This removes the staging driver in favour of the one being merged upstream in 5.7
Signed-off-by: Thomas Backlund <tmb@mageia.org>
---
MAINTAINERS | 6
drivers/staging/Kconfig | 2
drivers/staging/Makefile | 1
drivers/staging/exfat/Kconfig | 41 --
drivers/staging/exfat/Makefile | 10
drivers/staging/exfat/TODO | 69 ---
drivers/staging/exfat/exfat.h | 824 ----------------------------------------
drivers/staging/exfat/exfat_blkdev.c | 136 ------
drivers/staging/exfat/exfat_cache.c | 555 ---------------------------
drivers/staging/exfat/exfat_core.c | 2582 --------------------------------------------------------------------------------------------------------------------------------
drivers/staging/exfat/exfat_nls.c | 212 ----------
drivers/staging/exfat/exfat_super.c | 3883 -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
drivers/staging/exfat/exfat_upcase.c | 740 ------------------------------------
13 files changed, 9061 deletions(-)
diff -Nurp linux-5.6.3.orig/drivers/staging/exfat/exfat_blkdev.c linux-5.6.3/drivers/staging/exfat/exfat_blkdev.c
--- linux-5.6.3.orig/drivers/staging/exfat/exfat_blkdev.c 2020-03-30 01:25:41.000000000 +0300
+++ linux-5.6.3/drivers/staging/exfat/exfat_blkdev.c 1970-01-01 02:00:00.000000000 +0200
@@ -1,136 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * Copyright (C) 2012-2013 Samsung Electronics Co., Ltd.
- */
-
-#include <linux/blkdev.h>
-#include <linux/buffer_head.h>
-#include <linux/fs.h>
-#include "exfat.h"
-
-void exfat_bdev_open(struct super_block *sb)
-{
- struct bd_info_t *p_bd = &(EXFAT_SB(sb)->bd_info);
-
- if (p_bd->opened)
- return;
-
- p_bd->sector_size = bdev_logical_block_size(sb->s_bdev);
- p_bd->sector_size_bits = ilog2(p_bd->sector_size);
- p_bd->sector_size_mask = p_bd->sector_size - 1;
- p_bd->num_sectors = i_size_read(sb->s_bdev->bd_inode) >>
- p_bd->sector_size_bits;
- p_bd->opened = true;
-}
-
-void exfat_bdev_close(struct super_block *sb)
-{
- struct bd_info_t *p_bd = &(EXFAT_SB(sb)->bd_info);
-
- p_bd->opened = false;
-}
-
-int exfat_bdev_read(struct super_block *sb, sector_t secno, struct buffer_head **bh,
- u32 num_secs, bool read)
-{
- struct bd_info_t *p_bd = &(EXFAT_SB(sb)->bd_info);
- struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
-#ifdef CONFIG_STAGING_EXFAT_KERNEL_DEBUG
- struct exfat_sb_info *sbi = EXFAT_SB(sb);
- long flags = sbi->debug_flags;
-
- if (flags & EXFAT_DEBUGFLAGS_ERROR_RW)
- return -EIO;
-#endif /* CONFIG_STAGING_EXFAT_KERNEL_DEBUG */
-
- if (!p_bd->opened)
- return -ENODEV;
-
- if (*bh)
- __brelse(*bh);
-
- if (read)
- *bh = __bread(sb->s_bdev, secno,
- num_secs << p_bd->sector_size_bits);
- else
- *bh = __getblk(sb->s_bdev, secno,
- num_secs << p_bd->sector_size_bits);
-
- if (*bh)
- return 0;
-
- WARN(!p_fs->dev_ejected,
- "[EXFAT] No bh, device seems wrong or to be ejected.\n");
-
- return -EIO;
-}
-
-int exfat_bdev_write(struct super_block *sb, sector_t secno, struct buffer_head *bh,
- u32 num_secs, bool sync)
-{
- s32 count;
- struct buffer_head *bh2;
- struct bd_info_t *p_bd = &(EXFAT_SB(sb)->bd_info);
- struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
-#ifdef CONFIG_STAGING_EXFAT_KERNEL_DEBUG
- struct exfat_sb_info *sbi = EXFAT_SB(sb);
- long flags = sbi->debug_flags;
-
- if (flags & EXFAT_DEBUGFLAGS_ERROR_RW)
- return -EIO;
-#endif /* CONFIG_STAGING_EXFAT_KERNEL_DEBUG */
-
- if (!p_bd->opened)
- return -ENODEV;
-
- if (secno == bh->b_blocknr) {
- lock_buffer(bh);
- set_buffer_uptodate(bh);
- mark_buffer_dirty(bh);
- unlock_buffer(bh);
- if (sync && (sync_dirty_buffer(bh) != 0))
- return -EIO;
- } else {
- count = num_secs << p_bd->sector_size_bits;
-
- bh2 = __getblk(sb->s_bdev, secno, count);
- if (!bh2)
- goto no_bh;
-
- lock_buffer(bh2);
- memcpy(bh2->b_data, bh->b_data, count);
- set_buffer_uptodate(bh2);
- mark_buffer_dirty(bh2);
- unlock_buffer(bh2);
- if (sync && (sync_dirty_buffer(bh2) != 0)) {
- __brelse(bh2);
- goto no_bh;
- }
- __brelse(bh2);
- }
-
- return 0;
-
-no_bh:
- WARN(!p_fs->dev_ejected,
- "[EXFAT] No bh, device seems wrong or to be ejected.\n");
-
- return -EIO;
-}
-
-int exfat_bdev_sync(struct super_block *sb)
-{
- struct bd_info_t *p_bd = &(EXFAT_SB(sb)->bd_info);
-#ifdef CONFIG_STAGING_EXFAT_KERNEL_DEBUG
- struct exfat_sb_info *sbi = EXFAT_SB(sb);
- long flags = sbi->debug_flags;
-
- if (flags & EXFAT_DEBUGFLAGS_ERROR_RW)
- return -EIO;
-#endif /* CONFIG_STAGING_EXFAT_KERNEL_DEBUG */
-
- if (!p_bd->opened)
- return -ENODEV;
-
- return sync_blockdev(sb->s_bdev);
-}
diff -Nurp linux-5.6.3.orig/drivers/staging/exfat/exfat_cache.c linux-5.6.3/drivers/staging/exfat/exfat_cache.c
--- linux-5.6.3.orig/drivers/staging/exfat/exfat_cache.c 2020-03-30 01:25:41.000000000 +0300
+++ linux-5.6.3/drivers/staging/exfat/exfat_cache.c 1970-01-01 02:00:00.000000000 +0200
@@ -1,555 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * Copyright (C) 2012-2013 Samsung Electronics Co., Ltd.
- */
-
-#include <linux/buffer_head.h>
-#include <linux/fs.h>
-#include <linux/mutex.h>
-#include "exfat.h"
-
-#define LOCKBIT 0x01
-#define DIRTYBIT 0x02
-
-/* Local variables */
-static DEFINE_MUTEX(f_mutex);
-static DEFINE_MUTEX(b_mutex);
-
-static struct buf_cache_t *FAT_cache_find(struct super_block *sb, sector_t sec)
-{
- s32 off;
- struct buf_cache_t *bp, *hp;
- struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
-
- off = (sec +
- (sec >> p_fs->sectors_per_clu_bits)) & (FAT_CACHE_HASH_SIZE - 1);
-
- hp = &p_fs->FAT_cache_hash_list[off];
- for (bp = hp->hash_next; bp != hp; bp = bp->hash_next) {
- if ((bp->drv == p_fs->drv) && (bp->sec == sec)) {
- WARN(!bp->buf_bh,
- "[EXFAT] FAT_cache has no bh. It will make system panic.\n");
-
- touch_buffer(bp->buf_bh);
- return bp;
- }
- }
- return NULL;
-}
-
-static void push_to_mru(struct buf_cache_t *bp, struct buf_cache_t *list)
-{
- bp->next = list->next;
- bp->prev = list;
- list->next->prev = bp;
- list->next = bp;
-}
-
-static void push_to_lru(struct buf_cache_t *bp, struct buf_cache_t *list)
-{
- bp->prev = list->prev;
- bp->next = list;
- list->prev->next = bp;
- list->prev = bp;
-}
-
-static void move_to_mru(struct buf_cache_t *bp, struct buf_cache_t *list)
-{
- bp->prev->next = bp->next;
- bp->next->prev = bp->prev;
- push_to_mru(bp, list);
-}
-
-static void move_to_lru(struct buf_cache_t *bp, struct buf_cache_t *list)
-{
- bp->prev->next = bp->next;
- bp->next->prev = bp->prev;
- push_to_lru(bp, list);
-}
-
-static struct buf_cache_t *FAT_cache_get(struct super_block *sb, sector_t sec)
-{
- struct buf_cache_t *bp;
- struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
-
- bp = p_fs->FAT_cache_lru_list.prev;
-
- move_to_mru(bp, &p_fs->FAT_cache_lru_list);
- return bp;
-}
-
-static void FAT_cache_insert_hash(struct super_block *sb,
- struct buf_cache_t *bp)
-{
- s32 off;
- struct buf_cache_t *hp;
- struct fs_info_t *p_fs;
-
- p_fs = &(EXFAT_SB(sb)->fs_info);
- off = (bp->sec +
- (bp->sec >> p_fs->sectors_per_clu_bits)) &
- (FAT_CACHE_HASH_SIZE - 1);
-
- hp = &p_fs->FAT_cache_hash_list[off];
- bp->hash_next = hp->hash_next;
- bp->hash_prev = hp;
- hp->hash_next->hash_prev = bp;
- hp->hash_next = bp;
-}
-
-static void FAT_cache_remove_hash(struct buf_cache_t *bp)
-{
- (bp->hash_prev)->hash_next = bp->hash_next;
- (bp->hash_next)->hash_prev = bp->hash_prev;
-}
-
-static void buf_cache_insert_hash(struct super_block *sb,
- struct buf_cache_t *bp)
-{
- s32 off;
- struct buf_cache_t *hp;
- struct fs_info_t *p_fs;
-
- p_fs = &(EXFAT_SB(sb)->fs_info);
- off = (bp->sec +
- (bp->sec >> p_fs->sectors_per_clu_bits)) &
- (BUF_CACHE_HASH_SIZE - 1);
-
- hp = &p_fs->buf_cache_hash_list[off];
- bp->hash_next = hp->hash_next;
- bp->hash_prev = hp;
- hp->hash_next->hash_prev = bp;
- hp->hash_next = bp;
-}
-
-static void buf_cache_remove_hash(struct buf_cache_t *bp)
-{
- (bp->hash_prev)->hash_next = bp->hash_next;
- (bp->hash_next)->hash_prev = bp->hash_prev;
-}
-
-void exfat_buf_init(struct super_block *sb)
-{
- struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
-
- int i;
-
- /* LRU list */
- p_fs->FAT_cache_lru_list.next = &p_fs->FAT_cache_lru_list;
- p_fs->FAT_cache_lru_list.prev = &p_fs->FAT_cache_lru_list;
-
- for (i = 0; i < FAT_CACHE_SIZE; i++) {
- p_fs->FAT_cache_array[i].drv = -1;
- p_fs->FAT_cache_array[i].sec = ~0;
- p_fs->FAT_cache_array[i].flag = 0;
- p_fs->FAT_cache_array[i].buf_bh = NULL;
- p_fs->FAT_cache_array[i].prev = NULL;
- p_fs->FAT_cache_array[i].next = NULL;
- push_to_mru(&p_fs->FAT_cache_array[i],
- &p_fs->FAT_cache_lru_list);
- }
-
- p_fs->buf_cache_lru_list.next = &p_fs->buf_cache_lru_list;
- p_fs->buf_cache_lru_list.prev = &p_fs->buf_cache_lru_list;
-
- for (i = 0; i < BUF_CACHE_SIZE; i++) {
- p_fs->buf_cache_array[i].drv = -1;
- p_fs->buf_cache_array[i].sec = ~0;
- p_fs->buf_cache_array[i].flag = 0;
- p_fs->buf_cache_array[i].buf_bh = NULL;
- p_fs->buf_cache_array[i].prev = NULL;
- p_fs->buf_cache_array[i].next = NULL;
- push_to_mru(&p_fs->buf_cache_array[i],
- &p_fs->buf_cache_lru_list);
- }
-
- /* HASH list */
- for (i = 0; i < FAT_CACHE_HASH_SIZE; i++) {
- p_fs->FAT_cache_hash_list[i].drv = -1;
- p_fs->FAT_cache_hash_list[i].sec = ~0;
- p_fs->FAT_cache_hash_list[i].hash_next =
- &p_fs->FAT_cache_hash_list[i];
- p_fs->FAT_cache_hash_list[i].hash_prev =
- &p_fs->FAT_cache_hash_list[i];
- }
-
- for (i = 0; i < FAT_CACHE_SIZE; i++)
- FAT_cache_insert_hash(sb, &p_fs->FAT_cache_array[i]);
-
- for (i = 0; i < BUF_CACHE_HASH_SIZE; i++) {
- p_fs->buf_cache_hash_list[i].drv = -1;
- p_fs->buf_cache_hash_list[i].sec = ~0;
- p_fs->buf_cache_hash_list[i].hash_next =
- &p_fs->buf_cache_hash_list[i];
- p_fs->buf_cache_hash_list[i].hash_prev =
- &p_fs->buf_cache_hash_list[i];
- }
-
- for (i = 0; i < BUF_CACHE_SIZE; i++)
- buf_cache_insert_hash(sb, &p_fs->buf_cache_array[i]);
-}
-
-void exfat_buf_shutdown(struct super_block *sb)
-{
-}
-
-static int __exfat_fat_read(struct super_block *sb, u32 loc, u32 *content)
-{
- s32 off;
- u32 _content;
- sector_t sec;
- u8 *fat_sector, *fat_entry;
- struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
- struct bd_info_t *p_bd = &(EXFAT_SB(sb)->bd_info);
-
- sec = p_fs->FAT1_start_sector +
- (loc >> (p_bd->sector_size_bits - 2));
- off = (loc << 2) & p_bd->sector_size_mask;
-
- fat_sector = exfat_fat_getblk(sb, sec);
- if (!fat_sector)
- return -1;
-
- fat_entry = &fat_sector[off];
- _content = GET32_A(fat_entry);
-
- if (_content >= CLUSTER_32(0xFFFFFFF8)) {
- *content = CLUSTER_32(~0);
- return 0;
- }
- *content = CLUSTER_32(_content);
- return 0;
-}
-
-/* in : sb, loc
- * out: content
- * returns 0 on success
- * -1 on error
- */
-int exfat_fat_read(struct super_block *sb, u32 loc, u32 *content)
-{
- s32 ret;
-
- mutex_lock(&f_mutex);
- ret = __exfat_fat_read(sb, loc, content);
- mutex_unlock(&f_mutex);
-
- return ret;
-}
-
-static s32 __exfat_fat_write(struct super_block *sb, u32 loc, u32 content)
-{
- s32 off;
- sector_t sec;
- u8 *fat_sector, *fat_entry;
- struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
- struct bd_info_t *p_bd = &(EXFAT_SB(sb)->bd_info);
-
- sec = p_fs->FAT1_start_sector + (loc >>
- (p_bd->sector_size_bits - 2));
- off = (loc << 2) & p_bd->sector_size_mask;
-
- fat_sector = exfat_fat_getblk(sb, sec);
- if (!fat_sector)
- return -1;
-
- fat_entry = &fat_sector[off];
-
- SET32_A(fat_entry, content);
-
- exfat_fat_modify(sb, sec);
- return 0;
-}
-
-int exfat_fat_write(struct super_block *sb, u32 loc, u32 content)
-{
- s32 ret;
-
- mutex_lock(&f_mutex);
- ret = __exfat_fat_write(sb, loc, content);
- mutex_unlock(&f_mutex);
-
- return ret;
-}
-
-u8 *exfat_fat_getblk(struct super_block *sb, sector_t sec)
-{
- struct buf_cache_t *bp;
- struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
-
- bp = FAT_cache_find(sb, sec);
- if (bp) {
- move_to_mru(bp, &p_fs->FAT_cache_lru_list);
- return bp->buf_bh->b_data;
- }
-
- bp = FAT_cache_get(sb, sec);
-
- FAT_cache_remove_hash(bp);
-
- bp->drv = p_fs->drv;
- bp->sec = sec;
- bp->flag = 0;
-
- FAT_cache_insert_hash(sb, bp);
-
- if (sector_read(sb, sec, &bp->buf_bh, 1) != 0) {
- FAT_cache_remove_hash(bp);
- bp->drv = -1;
- bp->sec = ~0;
- bp->flag = 0;
- bp->buf_bh = NULL;
-
- move_to_lru(bp, &p_fs->FAT_cache_lru_list);
- return NULL;
- }
-
- return bp->buf_bh->b_data;
-}
-
-void exfat_fat_modify(struct super_block *sb, sector_t sec)
-{
- struct buf_cache_t *bp;
-
- bp = FAT_cache_find(sb, sec);
- if (bp)
- sector_write(sb, sec, bp->buf_bh, 0);
-}
-
-void exfat_fat_release_all(struct super_block *sb)
-{
- struct buf_cache_t *bp;
- struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
-
- mutex_lock(&f_mutex);
-
- bp = p_fs->FAT_cache_lru_list.next;
- while (bp != &p_fs->FAT_cache_lru_list) {
- if (bp->drv == p_fs->drv) {
- bp->drv = -1;
- bp->sec = ~0;
- bp->flag = 0;
-
- if (bp->buf_bh) {
- __brelse(bp->buf_bh);
- bp->buf_bh = NULL;
- }
- }
- bp = bp->next;
- }
-
- mutex_unlock(&f_mutex);
-}
-
-void exfat_fat_sync(struct super_block *sb)
-{
- struct buf_cache_t *bp;
- struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
-
- mutex_lock(&f_mutex);
-
- bp = p_fs->FAT_cache_lru_list.next;
- while (bp != &p_fs->FAT_cache_lru_list) {
- if ((bp->drv == p_fs->drv) && (bp->flag & DIRTYBIT)) {
- sync_dirty_buffer(bp->buf_bh);
- bp->flag &= ~(DIRTYBIT);
- }
- bp = bp->next;
- }
-
- mutex_unlock(&f_mutex);
-}
-
-static struct buf_cache_t *buf_cache_find(struct super_block *sb, sector_t sec)
-{
- s32 off;
- struct buf_cache_t *bp, *hp;
- struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
-
- off = (sec + (sec >> p_fs->sectors_per_clu_bits)) &
- (BUF_CACHE_HASH_SIZE - 1);
-
- hp = &p_fs->buf_cache_hash_list[off];
- for (bp = hp->hash_next; bp != hp; bp = bp->hash_next) {
- if ((bp->drv == p_fs->drv) && (bp->sec == sec)) {
- touch_buffer(bp->buf_bh);
- return bp;
- }
- }
- return NULL;
-}
-
-static struct buf_cache_t *buf_cache_get(struct super_block *sb, sector_t sec)
-{
- struct buf_cache_t *bp;
- struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
-
- bp = p_fs->buf_cache_lru_list.prev;
- while (bp->flag & LOCKBIT)
- bp = bp->prev;
-
- move_to_mru(bp, &p_fs->buf_cache_lru_list);
- return bp;
-}
-
-static u8 *__exfat_buf_getblk(struct super_block *sb, sector_t sec)
-{
- struct buf_cache_t *bp;
- struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
-
- bp = buf_cache_find(sb, sec);
- if (bp) {
- move_to_mru(bp, &p_fs->buf_cache_lru_list);
- return bp->buf_bh->b_data;
- }
-
- bp = buf_cache_get(sb, sec);
-
- buf_cache_remove_hash(bp);
-
- bp->drv = p_fs->drv;
- bp->sec = sec;
- bp->flag = 0;
-
- buf_cache_insert_hash(sb, bp);
-
- if (sector_read(sb, sec, &bp->buf_bh, 1) != 0) {
- buf_cache_remove_hash(bp);
- bp->drv = -1;
- bp->sec = ~0;
- bp->flag = 0;
- bp->buf_bh = NULL;
-
- move_to_lru(bp, &p_fs->buf_cache_lru_list);
- return NULL;
- }
-
- return bp->buf_bh->b_data;
-}
-
-u8 *exfat_buf_getblk(struct super_block *sb, sector_t sec)
-{
- u8 *buf;
-
- mutex_lock(&b_mutex);
- buf = __exfat_buf_getblk(sb, sec);
- mutex_unlock(&b_mutex);
-
- return buf;
-}
-
-void exfat_buf_modify(struct super_block *sb, sector_t sec)
-{
- struct buf_cache_t *bp;
-
- mutex_lock(&b_mutex);
-
- bp = buf_cache_find(sb, sec);
- if (likely(bp))
- sector_write(sb, sec, bp->buf_bh, 0);
-
- WARN(!bp, "[EXFAT] failed to find buffer_cache(sector:%llu).\n",
- (unsigned long long)sec);
-
- mutex_unlock(&b_mutex);
-}
-
-void exfat_buf_lock(struct super_block *sb, sector_t sec)
-{
- struct buf_cache_t *bp;
-
- mutex_lock(&b_mutex);
-
- bp = buf_cache_find(sb, sec);
- if (likely(bp))
- bp->flag |= LOCKBIT;
-
- WARN(!bp, "[EXFAT] failed to find buffer_cache(sector:%llu).\n",
- (unsigned long long)sec);
-
- mutex_unlock(&b_mutex);
-}
-
-void exfat_buf_unlock(struct super_block *sb, sector_t sec)
-{
- struct buf_cache_t *bp;
-
- mutex_lock(&b_mutex);
-
- bp = buf_cache_find(sb, sec);
- if (likely(bp))
- bp->flag &= ~(LOCKBIT);
-
- WARN(!bp, "[EXFAT] failed to find buffer_cache(sector:%llu).\n",
- (unsigned long long)sec);
-
- mutex_unlock(&b_mutex);
-}
-
-void exfat_buf_release(struct super_block *sb, sector_t sec)
-{
- struct buf_cache_t *bp;
- struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
-
- mutex_lock(&b_mutex);
-
- bp = buf_cache_find(sb, sec);
- if (likely(bp)) {
- bp->drv = -1;
- bp->sec = ~0;
- bp->flag = 0;
-
- if (bp->buf_bh) {
- __brelse(bp->buf_bh);
- bp->buf_bh = NULL;
- }
-
- move_to_lru(bp, &p_fs->buf_cache_lru_list);
- }
-
- mutex_unlock(&b_mutex);
-}
-
-void exfat_buf_release_all(struct super_block *sb)
-{
- struct buf_cache_t *bp;
- struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
-
- mutex_lock(&b_mutex);
-
- bp = p_fs->buf_cache_lru_list.next;
- while (bp != &p_fs->buf_cache_lru_list) {
- if (bp->drv == p_fs->drv) {
- bp->drv = -1;
- bp->sec = ~0;
- bp->flag = 0;
-
- if (bp->buf_bh) {
- __brelse(bp->buf_bh);
- bp->buf_bh = NULL;
- }
- }
- bp = bp->next;
- }
-
- mutex_unlock(&b_mutex);
-}
-
-void exfat_buf_sync(struct super_block *sb)
-{
- struct buf_cache_t *bp;
- struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
-
- mutex_lock(&b_mutex);
-
- bp = p_fs->buf_cache_lru_list.next;
- while (bp != &p_fs->buf_cache_lru_list) {
- if ((bp->drv == p_fs->drv) && (bp->flag & DIRTYBIT)) {
- sync_dirty_buffer(bp->buf_bh);
- bp->flag &= ~(DIRTYBIT);
- }
- bp = bp->next;
- }
-
- mutex_unlock(&b_mutex);
-}
diff -Nurp linux-5.6.3.orig/drivers/staging/exfat/exfat_core.c linux-5.6.3/drivers/staging/exfat/exfat_core.c
--- linux-5.6.3.orig/drivers/staging/exfat/exfat_core.c 2020-03-30 01:25:41.000000000 +0300
+++ linux-5.6.3/drivers/staging/exfat/exfat_core.c 1970-01-01 02:00:00.000000000 +0200
@@ -1,2582 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * Copyright (C) 2012-2013 Samsung Electronics Co., Ltd.
- */
-
-#include <linux/types.h>
-#include <linux/buffer_head.h>
-#include <linux/fs.h>
-#include <linux/mutex.h>
-#include <linux/blkdev.h>
-#include <linux/slab.h>
-#include "exfat.h"
-
-static void __set_sb_dirty(struct super_block *sb)
-{
- struct exfat_sb_info *sbi = EXFAT_SB(sb);
-
- sbi->s_dirt = 1;
-}
-
-static u8 name_buf[MAX_PATH_LENGTH * MAX_CHARSET_SIZE];
-
-static u8 free_bit[] = {
- 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0, 4, 0, 1, 0, 2, /* 0 ~ 19 */
- 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0, 5, 0, 1, 0, 2, 0, 1, 0, 3, /* 20 ~ 39 */
- 0, 1, 0, 2, 0, 1, 0, 4, 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, /* 40 ~ 59 */
- 0, 1, 0, 6, 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0, 4, /* 60 ~ 79 */
- 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0, 5, 0, 1, 0, 2, /* 80 ~ 99 */
- 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0, 4, 0, 1, 0, 2, 0, 1, 0, 3, /* 100 ~ 119 */
- 0, 1, 0, 2, 0, 1, 0, 7, 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, /* 120 ~ 139 */
- 0, 1, 0, 4, 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0, 5, /* 140 ~ 159 */
- 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0, 4, 0, 1, 0, 2, /* 160 ~ 179 */
- 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0, 6, 0, 1, 0, 2, 0, 1, 0, 3, /* 180 ~ 199 */
- 0, 1, 0, 2, 0, 1, 0, 4, 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, /* 200 ~ 219 */
- 0, 1, 0, 5, 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0, 4, /* 220 ~ 239 */
- 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0 /* 240 ~ 254 */
-};
-
-static u8 used_bit[] = {
- 0, 1, 1, 2, 1, 2, 2, 3, 1, 2, 2, 3, 2, 3, 3, 4, 1, 2, 2, 3, /* 0 ~ 19 */
- 2, 3, 3, 4, 2, 3, 3, 4, 3, 4, 4, 5, 1, 2, 2, 3, 2, 3, 3, 4, /* 20 ~ 39 */
- 2, 3, 3, 4, 3, 4, 4, 5, 2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, /* 40 ~ 59 */
- 4, 5, 5, 6, 1, 2, 2, 3, 2, 3, 3, 4, 2, 3, 3, 4, 3, 4, 4, 5, /* 60 ~ 79 */
- 2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6, 2, 3, 3, 4, /* 80 ~ 99 */
- 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6, 3, 4, 4, 5, 4, 5, 5, 6, /* 100 ~ 119 */
- 4, 5, 5, 6, 5, 6, 6, 7, 1, 2, 2, 3, 2, 3, 3, 4, 2, 3, 3, 4, /* 120 ~ 139 */
- 3, 4, 4, 5, 2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6, /* 140 ~ 159 */
- 2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6, 3, 4, 4, 5, /* 160 ~ 179 */
- 4, 5, 5, 6, 4, 5, 5, 6, 5, 6, 6, 7, 2, 3, 3, 4, 3, 4, 4, 5, /* 180 ~ 199 */
- 3, 4, 4, 5, 4, 5, 5, 6, 3, 4, 4, 5, 4, 5, 5, 6, 4, 5, 5, 6, /* 200 ~ 219 */
- 5, 6, 6, 7, 3, 4, 4, 5, 4, 5, 5, 6, 4, 5, 5, 6, 5, 6, 6, 7, /* 220 ~ 239 */
- 4, 5, 5, 6, 5, 6, 6, 7, 5, 6, 6, 7, 6, 7, 7, 8 /* 240 ~ 255 */
-};
-
-#define BITMAP_LOC(v) ((v) >> 3)
-#define BITMAP_SHIFT(v) ((v) & 0x07)
-
-static inline s32 exfat_bitmap_test(u8 *bitmap, int i)
-{
- u8 data;
-
- data = bitmap[BITMAP_LOC(i)];
- if ((data >> BITMAP_SHIFT(i)) & 0x01)
- return 1;
- return 0;
-}
-
-static inline void exfat_bitmap_set(u8 *bitmap, int i)
-{
- bitmap[BITMAP_LOC(i)] |= (0x01 << BITMAP_SHIFT(i));
-}
-
-static inline void exfat_bitmap_clear(u8 *bitmap, int i)
-{
- bitmap[BITMAP_LOC(i)] &= ~(0x01 << BITMAP_SHIFT(i));
-}
-
-/*
- * File System Management Functions
- */
-
-void fs_set_vol_flags(struct super_block *sb, u32 new_flag)
-{
- struct pbr_sector_t *p_pbr;
- struct bpbex_t *p_bpb;
- struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
-
- if (p_fs->vol_flag == new_flag)
- return;
-
- p_fs->vol_flag = new_flag;
-
- if (!p_fs->pbr_bh) {
- if (sector_read(sb, p_fs->PBR_sector,
- &p_fs->pbr_bh, 1) != 0)
- return;
- }
-
- p_pbr = (struct pbr_sector_t *)p_fs->pbr_bh->b_data;
- p_bpb = (struct bpbex_t *)p_pbr->bpb;
- SET16(p_bpb->vol_flags, (u16)new_flag);
-
- /* XXX duyoung
- * what can we do here? (cuz fs_set_vol_flags() is void)
- */
- if ((new_flag == VOL_DIRTY) && (!buffer_dirty(p_fs->pbr_bh)))
- sector_write(sb, p_fs->PBR_sector, p_fs->pbr_bh, 1);
- else
- sector_write(sb, p_fs->PBR_sector, p_fs->pbr_bh, 0);
-}
-
-void fs_error(struct super_block *sb)
-{
- struct exfat_mount_options *opts = &EXFAT_SB(sb)->options;
-
- if (opts->errors == EXFAT_ERRORS_PANIC) {
- panic("[EXFAT] Filesystem panic from previous error\n");
- } else if ((opts->errors == EXFAT_ERRORS_RO) && !sb_rdonly(sb)) {
- sb->s_flags |= SB_RDONLY;
- pr_err("[EXFAT] Filesystem has been set read-only\n");
- }
-}
-
-/*
- * Cluster Management Functions
- */
-
-static s32 clear_cluster(struct super_block *sb, u32 clu)
-{
- sector_t s, n;
- s32 ret = 0;
- struct buffer_head *tmp_bh = NULL;
- struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
- struct bd_info_t *p_bd = &(EXFAT_SB(sb)->bd_info);
-
- if (clu == CLUSTER_32(0)) { /* FAT16 root_dir */
- s = p_fs->root_start_sector;
- n = p_fs->data_start_sector;
- } else {
- s = START_SECTOR(clu);
- n = s + p_fs->sectors_per_clu;
- }
-
- for (; s < n; s++) {
- ret = sector_read(sb, s, &tmp_bh, 0);
- if (ret != 0)
- return ret;
-
- memset((char *)tmp_bh->b_data, 0x0, p_bd->sector_size);
- ret = sector_write(sb, s, tmp_bh, 0);
- if (ret != 0)
- break;
- }
-
- brelse(tmp_bh);
- return ret;
-}
-
-static s32 set_alloc_bitmap(struct super_block *sb, u32 clu)
-{
- int i, b;
- sector_t sector;
- struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
- struct bd_info_t *p_bd = &(EXFAT_SB(sb)->bd_info);
-
- i = clu >> (p_bd->sector_size_bits + 3);
- b = clu & ((p_bd->sector_size << 3) - 1);
-
- sector = START_SECTOR(p_fs->map_clu) + i;
-
- exfat_bitmap_set((u8 *)p_fs->vol_amap[i]->b_data, b);
-
- return sector_write(sb, sector, p_fs->vol_amap[i], 0);
-}
-
-static s32 clr_alloc_bitmap(struct super_block *sb, u32 clu)
-{
- int i, b;
- sector_t sector;
-#ifdef CONFIG_STAGING_EXFAT_DISCARD
- struct exfat_sb_info *sbi = EXFAT_SB(sb);
- struct exfat_mount_options *opts = &sbi->options;
- int ret;
-#endif /* CONFIG_STAGING_EXFAT_DISCARD */
- struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
- struct bd_info_t *p_bd = &(EXFAT_SB(sb)->bd_info);
-
- i = clu >> (p_bd->sector_size_bits + 3);
- b = clu & ((p_bd->sector_size << 3) - 1);
-
- sector = START_SECTOR(p_fs->map_clu) + i;
-
- exfat_bitmap_clear((u8 *)p_fs->vol_amap[i]->b_data, b);
-
-#ifdef CONFIG_STAGING_EXFAT_DISCARD
- if (opts->discard) {
- ret = sb_issue_discard(sb, START_SECTOR(clu),
- (1 << p_fs->sectors_per_clu_bits),
- GFP_NOFS, 0);
- if (ret == -EOPNOTSUPP) {
- pr_warn("discard not supported by device, disabling");
- opts->discard = 0;
- } else {
- return ret;
- }
- }
-#endif /* CONFIG_STAGING_EXFAT_DISCARD */
-
- return sector_write(sb, sector, p_fs->vol_amap[i], 0);
-}
-
-static u32 test_alloc_bitmap(struct super_block *sb, u32 clu)
-{
- int i, map_i, map_b;
- u32 clu_base, clu_free;
- u8 k, clu_mask;
- struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
- struct bd_info_t *p_bd = &(EXFAT_SB(sb)->bd_info);
-
- clu_base = (clu & ~(0x7)) + 2;
- clu_mask = (1 << (clu - clu_base + 2)) - 1;
-
- map_i = clu >> (p_bd->sector_size_bits + 3);
- map_b = (clu >> 3) & p_bd->sector_size_mask;
-
- for (i = 2; i < p_fs->num_clusters; i += 8) {
- k = *(((u8 *)p_fs->vol_amap[map_i]->b_data) + map_b);
- if (clu_mask > 0) {
- k |= clu_mask;
- clu_mask = 0;
- }
- if (k < 0xFF) {
- clu_free = clu_base + free_bit[k];
- if (clu_free < p_fs->num_clusters)
- return clu_free;
- }
- clu_base += 8;
-
- if (((++map_b) >= p_bd->sector_size) ||
- (clu_base >= p_fs->num_clusters)) {
- if ((++map_i) >= p_fs->map_sectors) {
- clu_base = 2;
- map_i = 0;
- }
- map_b = 0;
- }
- }
-
- return CLUSTER_32(~0);
-}
-
-s32 exfat_alloc_cluster(struct super_block *sb, s32 num_alloc,
- struct chain_t *p_chain)
-{
- s32 num_clusters = 0;
- u32 hint_clu, new_clu, last_clu = CLUSTER_32(~0);
- struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
-
- hint_clu = p_chain->dir;
- if (hint_clu == CLUSTER_32(~0)) {
- hint_clu = test_alloc_bitmap(sb, p_fs->clu_srch_ptr - 2);
- if (hint_clu == CLUSTER_32(~0))
- return 0;
- } else if (hint_clu >= p_fs->num_clusters) {
- hint_clu = 2;
- p_chain->flags = 0x01;
- }
-
- __set_sb_dirty(sb);
-
- p_chain->dir = CLUSTER_32(~0);
-
- while ((new_clu = test_alloc_bitmap(sb, hint_clu - 2)) != CLUSTER_32(~0)) {
- if (new_clu != hint_clu) {
- if (p_chain->flags == 0x03) {
- exfat_chain_cont_cluster(sb, p_chain->dir,
- num_clusters);
- p_chain->flags = 0x01;
- }
- }
-
- if (set_alloc_bitmap(sb, new_clu - 2) != 0)
- return -EIO;
-
- num_clusters++;
-
- if (p_chain->flags == 0x01) {
- if (exfat_fat_write(sb, new_clu, CLUSTER_32(~0)) < 0)
- return -EIO;
- }
-
- if (p_chain->dir == CLUSTER_32(~0)) {
- p_chain->dir = new_clu;
- } else {
- if (p_chain->flags == 0x01) {
- if (exfat_fat_write(sb, last_clu, new_clu) < 0)
- return -EIO;
- }
- }
- last_clu = new_clu;
-
- if ((--num_alloc) == 0) {
- p_fs->clu_srch_ptr = hint_clu;
- if (p_fs->used_clusters != UINT_MAX)
- p_fs->used_clusters += num_clusters;
-
- p_chain->size += num_clusters;
- return num_clusters;
- }
-
- hint_clu = new_clu + 1;
- if (hint_clu >= p_fs->num_clusters) {
- hint_clu = 2;
-
- if (p_chain->flags == 0x03) {
- exfat_chain_cont_cluster(sb, p_chain->dir,
- num_clusters);
- p_chain->flags = 0x01;
- }
- }
- }
-
- p_fs->clu_srch_ptr = hint_clu;
- if (p_fs->used_clusters != UINT_MAX)
- p_fs->used_clusters += num_clusters;
-
- p_chain->size += num_clusters;
- return num_clusters;
-}
-
-void exfat_free_cluster(struct super_block *sb, struct chain_t *p_chain,
- s32 do_relse)
-{
- s32 num_clusters = 0;
- u32 clu;
- struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
- int i;
- sector_t sector;
-
- if ((p_chain->dir == CLUSTER_32(0)) || (p_chain->dir == CLUSTER_32(~0)))
- return;
-
- if (p_chain->size <= 0) {
- pr_err("[EXFAT] free_cluster : skip free-req clu:%u, because of zero-size truncation\n",
- p_chain->dir);
- return;
- }
-
- __set_sb_dirty(sb);
- clu = p_chain->dir;
-
- if (p_chain->flags == 0x03) {
- do {
- if (do_relse) {
- sector = START_SECTOR(clu);
- for (i = 0; i < p_fs->sectors_per_clu; i++)
- exfat_buf_release(sb, sector + i);
- }
-
- if (clr_alloc_bitmap(sb, clu - 2) != 0)
- break;
- clu++;
-
- num_clusters++;
- } while (num_clusters < p_chain->size);
- } else {
- do {
- if (p_fs->dev_ejected)
- break;
-
- if (do_relse) {
- sector = START_SECTOR(clu);
- for (i = 0; i < p_fs->sectors_per_clu; i++)
- exfat_buf_release(sb, sector + i);
- }
-
- if (clr_alloc_bitmap(sb, clu - 2) != 0)
- break;
-
- if (exfat_fat_read(sb, clu, &clu) == -1)
- break;
- num_clusters++;
- } while ((clu != CLUSTER_32(0)) && (clu != CLUSTER_32(~0)));
- }
-
- if (p_fs->used_clusters != UINT_MAX)
- p_fs->used_clusters -= num_clusters;
-}
-
-static u32 find_last_cluster(struct super_block *sb, struct chain_t *p_chain)
-{
- u32 clu, next;
- struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
-
- clu = p_chain->dir;
-
- if (p_chain->flags == 0x03) {
- clu += p_chain->size - 1;
- } else {
- while ((exfat_fat_read(sb, clu, &next) == 0) &&
- (next != CLUSTER_32(~0))) {
- if (p_fs->dev_ejected)
- break;
- clu = next;
- }
- }
-
- return clu;
-}
-
-s32 count_num_clusters(struct super_block *sb, struct chain_t *p_chain)
-{
- int i, count = 0;
- u32 clu;
- struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
-
- if ((p_chain->dir == CLUSTER_32(0)) || (p_chain->dir == CLUSTER_32(~0)))
- return 0;
-
- clu = p_chain->dir;
-
- if (p_chain->flags == 0x03) {
- count = p_chain->size;
- } else {
- for (i = 2; i < p_fs->num_clusters; i++) {
- count++;
- if (exfat_fat_read(sb, clu, &clu) != 0)
- return 0;
- if (clu == CLUSTER_32(~0))
- break;
- }
- }
-
- return count;
-}
-
-s32 exfat_count_used_clusters(struct super_block *sb)
-{
- int i, map_i, map_b, count = 0;
- u8 k;
- struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
- struct bd_info_t *p_bd = &(EXFAT_SB(sb)->bd_info);
-
- map_i = 0;
- map_b = 0;
-
- for (i = 2; i < p_fs->num_clusters; i += 8) {
- k = *(((u8 *)p_fs->vol_amap[map_i]->b_data) + map_b);
- count += used_bit[k];
-
- if ((++map_b) >= p_bd->sector_size) {
- map_i++;
- map_b = 0;
- }
- }
-
- return count;
-}
-
-void exfat_chain_cont_cluster(struct super_block *sb, u32 chain, s32 len)
-{
- if (len == 0)
- return;
-
- while (len > 1) {
- if (exfat_fat_write(sb, chain, chain + 1) < 0)
- break;
- chain++;
- len--;
- }
- exfat_fat_write(sb, chain, CLUSTER_32(~0));
-}
-
-/*
- * Allocation Bitmap Management Functions
- */
-
-s32 load_alloc_bitmap(struct super_block *sb)
-{
- int i, j, ret;
- u32 map_size;
- u32 type;
- sector_t sector;
- struct chain_t clu;
- struct bmap_dentry_t *ep;
- struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
- struct bd_info_t *p_bd = &(EXFAT_SB(sb)->bd_info);
-
- clu.dir = p_fs->root_dir;
- clu.flags = 0x01;
-
- while (clu.dir != CLUSTER_32(~0)) {
- if (p_fs->dev_ejected)
- break;
-
- for (i = 0; i < p_fs->dentries_per_clu; i++) {
- ep = (struct bmap_dentry_t *)get_entry_in_dir(sb, &clu,
- i, NULL);
- if (!ep)
- return -ENOENT;
-
- type = exfat_get_entry_type((struct dentry_t *)ep);
-
- if (type == TYPE_UNUSED)
- break;
- if (type != TYPE_BITMAP)
- continue;
-
- if (ep->flags == 0x0) {
- p_fs->map_clu = GET32_A(ep->start_clu);
- map_size = (u32)GET64_A(ep->size);
-
- p_fs->map_sectors = ((map_size - 1) >> p_bd->sector_size_bits) + 1;
-
- p_fs->vol_amap = kmalloc_array(p_fs->map_sectors,
- sizeof(struct buffer_head *),
- GFP_KERNEL);
- if (!p_fs->vol_amap)
- return -ENOMEM;
-
- sector = START_SECTOR(p_fs->map_clu);
-
- for (j = 0; j < p_fs->map_sectors; j++) {
- p_fs->vol_amap[j] = NULL;
- ret = sector_read(sb, sector + j, &p_fs->vol_amap[j], 1);
- if (ret != 0) {
- /* release all buffers and free vol_amap */
- i = 0;
- while (i < j)
- brelse(p_fs->vol_amap[i++]);
-
- kfree(p_fs->vol_amap);
- p_fs->vol_amap = NULL;
- return ret;
- }
- }
-
- p_fs->pbr_bh = NULL;
- return 0;
- }
- }
-
- if (exfat_fat_read(sb, clu.dir, &clu.dir) != 0)
- return -EIO;
- }
-
- return -EFSCORRUPTED;
-}
-
-void free_alloc_bitmap(struct super_block *sb)
-{
- int i;
- struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
-
- brelse(p_fs->pbr_bh);
-
- for (i = 0; i < p_fs->map_sectors; i++)
- __brelse(p_fs->vol_amap[i]);
-
- kfree(p_fs->vol_amap);
- p_fs->vol_amap = NULL;
-}
-
-void sync_alloc_bitmap(struct super_block *sb)
-{
- int i;
- struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
-
- if (!p_fs->vol_amap)
- return;
-
- for (i = 0; i < p_fs->map_sectors; i++)
- sync_dirty_buffer(p_fs->vol_amap[i]);
-}
-
-/*
- * Upcase table Management Functions
- */
-static s32 __load_upcase_table(struct super_block *sb, sector_t sector,
- u32 num_sectors, u32 utbl_checksum)
-{
- int i, ret = -EINVAL;
- u32 j;
- struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
- struct bd_info_t *p_bd = &(EXFAT_SB(sb)->bd_info);
- struct buffer_head *tmp_bh = NULL;
- sector_t end_sector = num_sectors + sector;
-
- bool skip = false;
- u32 index = 0;
- u16 uni = 0;
- u16 **upcase_table;
-
- u32 checksum = 0;
-
- upcase_table = kmalloc_array(UTBL_COL_COUNT, sizeof(u16 *), GFP_KERNEL);
- p_fs->vol_utbl = upcase_table;
- if (!upcase_table)
- return -ENOMEM;
- memset(upcase_table, 0, UTBL_COL_COUNT * sizeof(u16 *));
-
- while (sector < end_sector) {
- ret = sector_read(sb, sector, &tmp_bh, 1);
- if (ret != 0) {
- pr_debug("sector read (0x%llX)fail\n",
- (unsigned long long)sector);
- goto error;
- }
- sector++;
-
- for (i = 0; i < p_bd->sector_size && index <= 0xFFFF; i += 2) {
- uni = GET16(((u8 *)tmp_bh->b_data) + i);
-
- checksum = ((checksum & 1) ? 0x80000000 : 0) +
- (checksum >> 1) + *(((u8 *)tmp_bh->b_data) +
- i);
- checksum = ((checksum & 1) ? 0x80000000 : 0) +
- (checksum >> 1) + *(((u8 *)tmp_bh->b_data) +
- (i + 1));
-
- if (skip) {
- pr_debug("skip from 0x%X ", index);
- index += uni;
- pr_debug("to 0x%X (amount of 0x%X)\n",
- index, uni);
- skip = false;
- } else if (uni == index) {
- index++;
- } else if (uni == 0xFFFF) {
- skip = true;
- } else { /* uni != index , uni != 0xFFFF */
- u16 col_index = get_col_index(index);
-
- if (!upcase_table[col_index]) {
- pr_debug("alloc = 0x%X\n", col_index);
- upcase_table[col_index] = kmalloc_array(UTBL_ROW_COUNT,
- sizeof(u16), GFP_KERNEL);
- if (!upcase_table[col_index]) {
- ret = -ENOMEM;
- goto error;
- }
-
- for (j = 0; j < UTBL_ROW_COUNT; j++)
- upcase_table[col_index][j] = (col_index << LOW_INDEX_BIT) | j;
- }
-
- upcase_table[col_index][get_row_index(index)] = uni;
- index++;
- }
- }
- }
- if (index >= 0xFFFF && utbl_checksum == checksum) {
- if (tmp_bh)
- brelse(tmp_bh);
- return 0;
- }
- ret = -EINVAL;
-error:
- if (tmp_bh)
- brelse(tmp_bh);
- free_upcase_table(sb);
- return ret;
-}
-
-static s32 __load_default_upcase_table(struct super_block *sb)
-{
- int i, ret = -EINVAL;
- u32 j;
- struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
-
- bool skip = false;
- u32 index = 0;
- u16 uni = 0;
- u16 **upcase_table;
-
- upcase_table = kmalloc_array(UTBL_COL_COUNT, sizeof(u16 *), GFP_KERNEL);
- p_fs->vol_utbl = upcase_table;
- if (!upcase_table)
- return -ENOMEM;
- memset(upcase_table, 0, UTBL_COL_COUNT * sizeof(u16 *));
-
- for (i = 0; index <= 0xFFFF && i < NUM_UPCASE * 2; i += 2) {
- uni = GET16(uni_upcase + i);
- if (skip) {
- pr_debug("skip from 0x%X ", index);
- index += uni;
- pr_debug("to 0x%X (amount of 0x%X)\n", index, uni);
- skip = false;
- } else if (uni == index) {
- index++;
- } else if (uni == 0xFFFF) {
- skip = true;
- } else { /* uni != index , uni != 0xFFFF */
- u16 col_index = get_col_index(index);
-
- if (!upcase_table[col_index]) {
- pr_debug("alloc = 0x%X\n", col_index);
- upcase_table[col_index] = kmalloc_array(UTBL_ROW_COUNT,
- sizeof(u16),
- GFP_KERNEL);
- if (!upcase_table[col_index]) {
- ret = -ENOMEM;
- goto error;
- }
-
- for (j = 0; j < UTBL_ROW_COUNT; j++)
- upcase_table[col_index][j] = (col_index << LOW_INDEX_BIT) | j;
- }
-
- upcase_table[col_index][get_row_index(index)] = uni;
- index++;
- }
- }
-
- if (index >= 0xFFFF)
- return 0;
-
-error:
- /* FATAL error: default upcase table has error */
- free_upcase_table(sb);
- return ret;
-}
-
-s32 load_upcase_table(struct super_block *sb)
-{
- int i;
- u32 tbl_clu, tbl_size;
- sector_t sector;
- u32 type, num_sectors;
- struct chain_t clu;
- struct case_dentry_t *ep;
- struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
- struct bd_info_t *p_bd = &(EXFAT_SB(sb)->bd_info);
-
- clu.dir = p_fs->root_dir;
- clu.flags = 0x01;
-
- if (p_fs->dev_ejected)
- return -EIO;
-
- while (clu.dir != CLUSTER_32(~0)) {
- for (i = 0; i < p_fs->dentries_per_clu; i++) {
- ep = (struct case_dentry_t *)get_entry_in_dir(sb, &clu,
- i, NULL);
- if (!ep)
- return -ENOENT;
-
- type = exfat_get_entry_type((struct dentry_t *)ep);
-
- if (type == TYPE_UNUSED)
- break;
- if (type != TYPE_UPCASE)
- continue;
-
- tbl_clu = GET32_A(ep->start_clu);
- tbl_size = (u32)GET64_A(ep->size);
-
- sector = START_SECTOR(tbl_clu);
- num_sectors = ((tbl_size - 1) >> p_bd->sector_size_bits) + 1;
- if (__load_upcase_table(sb, sector, num_sectors,
- GET32_A(ep->checksum)) != 0)
- break;
- return 0;
- }
- if (exfat_fat_read(sb, clu.dir, &clu.dir) != 0)
- return -EIO;
- }
- /* load default upcase table */
- return __load_default_upcase_table(sb);
-}
-
-void free_upcase_table(struct super_block *sb)
-{
- u32 i;
- struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
- u16 **upcase_table;
-
- upcase_table = p_fs->vol_utbl;
- for (i = 0; i < UTBL_COL_COUNT; i++)
- kfree(upcase_table[i]);
-
- kfree(p_fs->vol_utbl);
- p_fs->vol_utbl = NULL;
-}
-
-/*
- * Directory Entry Management Functions
- */
-
-u32 exfat_get_entry_type(struct dentry_t *p_entry)
-{
- struct file_dentry_t *ep = (struct file_dentry_t *)p_entry;
-
- if (ep->type == 0x0) {
- return TYPE_UNUSED;
- } else if (ep->type < 0x80) {
- return TYPE_DELETED;
- } else if (ep->type == 0x80) {
- return TYPE_INVALID;
- } else if (ep->type < 0xA0) {
- if (ep->type == 0x81) {
- return TYPE_BITMAP;
- } else if (ep->type == 0x82) {
- return TYPE_UPCASE;
- } else if (ep->type == 0x83) {
- return TYPE_VOLUME;
- } else if (ep->type == 0x85) {
- if (GET16_A(ep->attr) & ATTR_SUBDIR)
- return TYPE_DIR;
- else
- return TYPE_FILE;
- }
- return TYPE_CRITICAL_PRI;
- } else if (ep->type < 0xC0) {
- if (ep->type == 0xA0)
- return TYPE_GUID;
- else if (ep->type == 0xA1)
- return TYPE_PADDING;
- else if (ep->type == 0xA2)
- return TYPE_ACLTAB;
- return TYPE_BENIGN_PRI;
- } else if (ep->type < 0xE0) {
- if (ep->type == 0xC0)
- return TYPE_STREAM;
- else if (ep->type == 0xC1)
- return TYPE_EXTEND;
- else if (ep->type == 0xC2)
- return TYPE_ACL;
- return TYPE_CRITICAL_SEC;
- }
-
- return TYPE_BENIGN_SEC;
-}
-
-static void exfat_set_entry_type(struct dentry_t *p_entry, u32 type)
-{
- struct file_dentry_t *ep = (struct file_dentry_t *)p_entry;
-
- if (type == TYPE_UNUSED) {
- ep->type = 0x0;
- } else if (type == TYPE_DELETED) {
- ep->type &= ~0x80;
- } else if (type == TYPE_STREAM) {
- ep->type = 0xC0;
- } else if (type == TYPE_EXTEND) {
- ep->type = 0xC1;
- } else if (type == TYPE_BITMAP) {
- ep->type = 0x81;
- } else if (type == TYPE_UPCASE) {
- ep->type = 0x82;
- } else if (type == TYPE_VOLUME) {
- ep->type = 0x83;
- } else if (type == TYPE_DIR) {
- ep->type = 0x85;
- SET16_A(ep->attr, ATTR_SUBDIR);
- } else if (type == TYPE_FILE) {
- ep->type = 0x85;
- SET16_A(ep->attr, ATTR_ARCHIVE);
- } else if (type == TYPE_SYMLINK) {
- ep->type = 0x85;
- SET16_A(ep->attr, ATTR_ARCHIVE | ATTR_SYMLINK);
- }
-}
-
-u32 exfat_get_entry_attr(struct dentry_t *p_entry)
-{
- struct file_dentry_t *ep = (struct file_dentry_t *)p_entry;
-
- return (u32)GET16_A(ep->attr);
-}
-
-void exfat_set_entry_attr(struct dentry_t *p_entry, u32 attr)
-{
- struct file_dentry_t *ep = (struct file_dentry_t *)p_entry;
-
- SET16_A(ep->attr, (u16)attr);
-}
-
-u8 exfat_get_entry_flag(struct dentry_t *p_entry)
-{
- struct strm_dentry_t *ep = (struct strm_dentry_t *)p_entry;
-
- return ep->flags;
-}
-
-void exfat_set_entry_flag(struct dentry_t *p_entry, u8 flags)
-{
- struct strm_dentry_t *ep = (struct strm_dentry_t *)p_entry;
-
- ep->flags = flags;
-}
-
-u32 exfat_get_entry_clu0(struct dentry_t *p_entry)
-{
- struct strm_dentry_t *ep = (struct strm_dentry_t *)p_entry;
-
- return GET32_A(ep->start_clu);
-}
-
-void exfat_set_entry_clu0(struct dentry_t *p_entry, u32 start_clu)
-{
- struct strm_dentry_t *ep = (struct strm_dentry_t *)p_entry;
-
- SET32_A(ep->start_clu, start_clu);
-}
-
-u64 exfat_get_entry_size(struct dentry_t *p_entry)
-{
- struct strm_dentry_t *ep = (struct strm_dentry_t *)p_entry;
-
- return GET64_A(ep->valid_size);
-}
-
-void exfat_set_entry_size(struct dentry_t *p_entry, u64 size)
-{
- struct strm_dentry_t *ep = (struct strm_dentry_t *)p_entry;
-
- SET64_A(ep->valid_size, size);
- SET64_A(ep->size, size);
-}
-
-void exfat_get_entry_time(struct dentry_t *p_entry, struct timestamp_t *tp,
- u8 mode)
-{
- u16 t = 0x00, d = 0x21;
- struct file_dentry_t *ep = (struct file_dentry_t *)p_entry;
-
- switch (mode) {
- case TM_CREATE:
- t = GET16_A(ep->create_time);
- d = GET16_A(ep->create_date);
- break;
- case TM_MODIFY:
- t = GET16_A(ep->modify_time);
- d = GET16_A(ep->modify_date);
- break;
- case TM_ACCESS:
- t = GET16_A(ep->access_time);
- d = GET16_A(ep->access_date);
- break;
- }
-
- tp->sec = (t & 0x001F) << 1;
- tp->min = (t >> 5) & 0x003F;
- tp->hour = (t >> 11);
- tp->day = (d & 0x001F);
- tp->mon = (d >> 5) & 0x000F;
- tp->year = (d >> 9);
-}
-
-void exfat_set_entry_time(struct dentry_t *p_entry, struct timestamp_t *tp,
- u8 mode)
-{
- u16 t, d;
- struct file_dentry_t *ep = (struct file_dentry_t *)p_entry;
-
- t = (tp->hour << 11) | (tp->min << 5) | (tp->sec >> 1);
- d = (tp->year << 9) | (tp->mon << 5) | tp->day;
-
- switch (mode) {
- case TM_CREATE:
- SET16_A(ep->create_time, t);
- SET16_A(ep->create_date, d);
- break;
- case TM_MODIFY:
- SET16_A(ep->modify_time, t);
- SET16_A(ep->modify_date, d);
- break;
- case TM_ACCESS:
- SET16_A(ep->access_time, t);
- SET16_A(ep->access_date, d);
- break;
- }
-}
-
-static void init_file_entry(struct file_dentry_t *ep, u32 type)
-{
- struct timestamp_t tm, *tp;
-
- exfat_set_entry_type((struct dentry_t *)ep, type);
-
- tp = tm_current(&tm);
- exfat_set_entry_time((struct dentry_t *)ep, tp, TM_CREATE);
- exfat_set_entry_time((struct dentry_t *)ep, tp, TM_MODIFY);
- exfat_set_entry_time((struct dentry_t *)ep, tp, TM_ACCESS);
- ep->create_time_ms = 0;
- ep->modify_time_ms = 0;
- ep->access_time_ms = 0;
-}
-
-static void init_strm_entry(struct strm_dentry_t *ep, u8 flags, u32 start_clu, u64 size)
-{
- exfat_set_entry_type((struct dentry_t *)ep, TYPE_STREAM);
- ep->flags = flags;
- SET32_A(ep->start_clu, start_clu);
- SET64_A(ep->valid_size, size);
- SET64_A(ep->size, size);
-}
-
-static void init_name_entry(struct name_dentry_t *ep, u16 *uniname)
-{
- int i;
-
- exfat_set_entry_type((struct dentry_t *)ep, TYPE_EXTEND);
- ep->flags = 0x0;
-
- for (i = 0; i < 30; i++, i++) {
- SET16_A(ep->unicode_0_14 + i, *uniname);
- if (*uniname == 0x0)
- break;
- uniname++;
- }
-}
-
-static s32 exfat_init_dir_entry(struct super_block *sb, struct chain_t *p_dir,
- s32 entry, u32 type, u32 start_clu, u64 size)
-{
- sector_t sector;
- u8 flags;
- struct file_dentry_t *file_ep;
- struct strm_dentry_t *strm_ep;
-
- flags = (type == TYPE_FILE) ? 0x01 : 0x03;
-
- /* we cannot use get_entry_set_in_dir here because file ep is not initialized yet */
- file_ep = (struct file_dentry_t *)get_entry_in_dir(sb, p_dir, entry,
- §or);
- if (!file_ep)
- return -ENOENT;
-
- strm_ep = (struct strm_dentry_t *)get_entry_in_dir(sb, p_dir, entry + 1,
- §or);
- if (!strm_ep)
- return -ENOENT;
-
- init_file_entry(file_ep, type);
- exfat_buf_modify(sb, sector);
-
- init_strm_entry(strm_ep, flags, start_clu, size);
- exfat_buf_modify(sb, sector);
-
- return 0;
-}
-
-static s32 exfat_init_ext_entry(struct super_block *sb, struct chain_t *p_dir,
- s32 entry, s32 num_entries,
- struct uni_name_t *p_uniname,
- struct dos_name_t *p_dosname)
-{
- int i;
- sector_t sector;
- u16 *uniname = p_uniname->name;
- struct file_dentry_t *file_ep;
- struct strm_dentry_t *strm_ep;
- struct name_dentry_t *name_ep;
-
- file_ep = (struct file_dentry_t *)get_entry_in_dir(sb, p_dir, entry,
- §or);
- if (!file_ep)
- return -ENOENT;
-
- file_ep->num_ext = (u8)(num_entries - 1);
- exfat_buf_modify(sb, sector);
-
- strm_ep = (struct strm_dentry_t *)get_entry_in_dir(sb, p_dir, entry + 1,
- §or);
- if (!strm_ep)
- return -ENOENT;
-
- strm_ep->name_len = p_uniname->name_len;
- SET16_A(strm_ep->name_hash, p_uniname->name_hash);
- exfat_buf_modify(sb, sector);
-
- for (i = 2; i < num_entries; i++) {
- name_ep = (struct name_dentry_t *)get_entry_in_dir(sb, p_dir,
- entry + i,
- §or);
- if (!name_ep)
- return -ENOENT;
-
- init_name_entry(name_ep, uniname);
- exfat_buf_modify(sb, sector);
- uniname += 15;
- }
-
- update_dir_checksum(sb, p_dir, entry);
-
- return 0;
-}
-
-void exfat_delete_dir_entry(struct super_block *sb, struct chain_t *p_dir,
- s32 entry, s32 order, s32 num_entries)
-{
- int i;
- sector_t sector;
- struct dentry_t *ep;
-
- for (i = order; i < num_entries; i++) {
- ep = get_entry_in_dir(sb, p_dir, entry + i, §or);
- if (!ep)
- return;
-
- exfat_set_entry_type(ep, TYPE_DELETED);
- exfat_buf_modify(sb, sector);
- }
-}
-
-void update_dir_checksum(struct super_block *sb, struct chain_t *p_dir,
- s32 entry)
-{
- int i, num_entries;
- sector_t sector;
- u16 chksum;
- struct file_dentry_t *file_ep;
- struct dentry_t *ep;
-
- file_ep = (struct file_dentry_t *)get_entry_in_dir(sb, p_dir, entry,
- §or);
- if (!file_ep)
- return;
-
- exfat_buf_lock(sb, sector);
-
- num_entries = (s32)file_ep->num_ext + 1;
- chksum = calc_checksum_2byte((void *)file_ep, DENTRY_SIZE, 0,
- CS_DIR_ENTRY);
-
- for (i = 1; i < num_entries; i++) {
- ep = get_entry_in_dir(sb, p_dir, entry + i, NULL);
- if (!ep) {
- exfat_buf_unlock(sb, sector);
- return;
- }
-
- chksum = calc_checksum_2byte((void *)ep, DENTRY_SIZE, chksum,
- CS_DEFAULT);
- }
-
- SET16_A(file_ep->checksum, chksum);
- exfat_buf_modify(sb, sector);
- exfat_buf_unlock(sb, sector);
-}
-
-static s32 __write_partial_entries_in_entry_set(struct super_block *sb,
- struct entry_set_cache_t *es,
- sector_t sec, s32 off, u32 count)
-{
- s32 num_entries, buf_off = (off - es->offset);
- u32 remaining_byte_in_sector, copy_entries;
- struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
- struct bd_info_t *p_bd = &(EXFAT_SB(sb)->bd_info);
- u32 clu;
- u8 *buf, *esbuf = (u8 *)&es->__buf;
-
- pr_debug("%s entered es %p sec %llu off %d count %d\n",
- __func__, es, (unsigned long long)sec, off, count);
- num_entries = count;
-
- while (num_entries) {
- /* white per sector base */
- remaining_byte_in_sector = (1 << p_bd->sector_size_bits) - off;
- copy_entries = min_t(s32,
- remaining_byte_in_sector >> DENTRY_SIZE_BITS,
- num_entries);
- buf = exfat_buf_getblk(sb, sec);
- if (!buf)
- goto err_out;
- pr_debug("es->buf %p buf_off %u\n", esbuf, buf_off);
- pr_debug("copying %d entries from %p to sector %llu\n",
- copy_entries, (esbuf + buf_off),
- (unsigned long long)sec);
- memcpy(buf + off, esbuf + buf_off,
- copy_entries << DENTRY_SIZE_BITS);
- exfat_buf_modify(sb, sec);
- num_entries -= copy_entries;
-
- if (num_entries) {
- /* get next sector */
- if (IS_LAST_SECTOR_IN_CLUSTER(sec)) {
- clu = GET_CLUSTER_FROM_SECTOR(sec);
- if (es->alloc_flag == 0x03) {
- clu++;
- } else {
- if (exfat_fat_read(sb, clu, &clu) == -1)
- goto err_out;
- }
- sec = START_SECTOR(clu);
- } else {
- sec++;
- }
- off = 0;
- buf_off += copy_entries << DENTRY_SIZE_BITS;
- }
- }
-
- pr_debug("%s exited successfully\n", __func__);
- return 0;
-err_out:
- pr_debug("%s failed\n", __func__);
- return -EINVAL;
-}
-
-/* write back all entries in entry set */
-static s32 write_whole_entry_set(struct super_block *sb, struct entry_set_cache_t *es)
-{
- return __write_partial_entries_in_entry_set(sb, es, es->sector,
- es->offset,
- es->num_entries);
-}
-
-void update_dir_checksum_with_entry_set(struct super_block *sb,
- struct entry_set_cache_t *es)
-{
- struct dentry_t *ep;
- u16 chksum = 0;
- s32 chksum_type = CS_DIR_ENTRY, i;
-
- ep = (struct dentry_t *)&es->__buf;
- for (i = 0; i < es->num_entries; i++) {
- pr_debug("%s ep %p\n", __func__, ep);
- chksum = calc_checksum_2byte((void *)ep, DENTRY_SIZE, chksum,
- chksum_type);
- ep++;
- chksum_type = CS_DEFAULT;
- }
-
- ep = (struct dentry_t *)&es->__buf;
- SET16_A(((struct file_dentry_t *)ep)->checksum, chksum);
- write_whole_entry_set(sb, es);
-}
-
-static s32 _walk_fat_chain(struct super_block *sb, struct chain_t *p_dir,
- s32 byte_offset, u32 *clu)
-{
- struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
- s32 clu_offset;
- u32 cur_clu;
-
- clu_offset = byte_offset >> p_fs->cluster_size_bits;
- cur_clu = p_dir->dir;
-
- if (p_dir->flags == 0x03) {
- cur_clu += clu_offset;
- } else {
- while (clu_offset > 0) {
- if (exfat_fat_read(sb, cur_clu, &cur_clu) == -1)
- return -EIO;
- clu_offset--;
- }
- }
-
- if (clu)
- *clu = cur_clu;
- return 0;
-}
-
-static s32 find_location(struct super_block *sb, struct chain_t *p_dir, s32 entry,
- sector_t *sector, s32 *offset)
-{
- s32 off, ret;
- u32 clu = 0;
- struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
- struct bd_info_t *p_bd = &(EXFAT_SB(sb)->bd_info);
-
- off = entry << DENTRY_SIZE_BITS;
-
- if (p_dir->dir == CLUSTER_32(0)) { /* FAT16 root_dir */
- *offset = off & p_bd->sector_size_mask;
- *sector = off >> p_bd->sector_size_bits;
- *sector += p_fs->root_start_sector;
- } else {
- ret = _walk_fat_chain(sb, p_dir, off, &clu);
- if (ret != 0)
- return ret;
-
- /* byte offset in cluster */
- off &= p_fs->cluster_size - 1;
-
- /* byte offset in sector */
- *offset = off & p_bd->sector_size_mask;
-
- /* sector offset in cluster */
- *sector = off >> p_bd->sector_size_bits;
- *sector += START_SECTOR(clu);
- }
- return 0;
-}
-
-struct dentry_t *get_entry_in_dir(struct super_block *sb, struct chain_t *p_dir,
- s32 entry, sector_t *sector)
-{
- s32 off;
- sector_t sec;
- u8 *buf;
-
- if (find_location(sb, p_dir, entry, &sec, &off) != 0)
- return NULL;
-
- buf = exfat_buf_getblk(sb, sec);
-
- if (!buf)
- return NULL;
-
- if (sector)
- *sector = sec;
- return (struct dentry_t *)(buf + off);
-}
-
-/* returns a set of dentries for a file or dir.
- * Note that this is a copy (dump) of dentries so that user should call write_entry_set()
- * to apply changes made in this entry set to the real device.
- * in:
- * sb+p_dir+entry: indicates a file/dir
- * type: specifies how many dentries should be included.
- * out:
- * file_ep: will point the first dentry(= file dentry) on success
- * return:
- * pointer of entry set on success,
- * NULL on failure.
- */
-
-#define ES_MODE_STARTED 0
-#define ES_MODE_GET_FILE_ENTRY 1
-#define ES_MODE_GET_STRM_ENTRY 2
-#define ES_MODE_GET_NAME_ENTRY 3
-#define ES_MODE_GET_CRITICAL_SEC_ENTRY 4
-struct entry_set_cache_t *get_entry_set_in_dir(struct super_block *sb,
- struct chain_t *p_dir, s32 entry,
- u32 type,
- struct dentry_t **file_ep)
-{
- s32 off, ret, byte_offset;
- u32 clu = 0;
- sector_t sec;
- u32 entry_type;
- struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
- struct bd_info_t *p_bd = &(EXFAT_SB(sb)->bd_info);
- struct entry_set_cache_t *es = NULL;
- struct dentry_t *ep, *pos;
- u8 *buf;
- u8 num_entries;
- s32 mode = ES_MODE_STARTED;
- size_t bufsize;
-
- pr_debug("%s entered p_dir dir %u flags %x size %d\n",
- __func__, p_dir->dir, p_dir->flags, p_dir->size);
-
- byte_offset = entry << DENTRY_SIZE_BITS;
- ret = _walk_fat_chain(sb, p_dir, byte_offset, &clu);
- if (ret != 0)
- return NULL;
-
- /* byte offset in cluster */
- byte_offset &= p_fs->cluster_size - 1;
-
- /* byte offset in sector */
- off = byte_offset & p_bd->sector_size_mask;
-
- /* sector offset in cluster */
- sec = byte_offset >> p_bd->sector_size_bits;
- sec += START_SECTOR(clu);
-
- buf = exfat_buf_getblk(sb, sec);
- if (!buf)
- goto err_out;
-
- ep = (struct dentry_t *)(buf + off);
- entry_type = exfat_get_entry_type(ep);
-
- if ((entry_type != TYPE_FILE) && (entry_type != TYPE_DIR))
- goto err_out;
-
- if (type == ES_ALL_ENTRIES)
- num_entries = ((struct file_dentry_t *)ep)->num_ext + 1;
- else
- num_entries = type;
-
- bufsize = offsetof(struct entry_set_cache_t, __buf) + (num_entries) *
- sizeof(struct dentry_t);
- pr_debug("%s: trying to kmalloc %zx bytes for %d entries\n", __func__,
- bufsize, num_entries);
- es = kmalloc(bufsize, GFP_KERNEL);
- if (!es)
- goto err_out;
-
- es->num_entries = num_entries;
- es->sector = sec;
- es->offset = off;
- es->alloc_flag = p_dir->flags;
-
- pos = (struct dentry_t *)&es->__buf;
-
- while (num_entries) {
- /*
- * instead of copying whole sector, we will check every entry.
- * this will provide minimum stablity and consistency.
- */
- entry_type = exfat_get_entry_type(ep);
-
- if ((entry_type == TYPE_UNUSED) || (entry_type == TYPE_DELETED))
- goto err_out;
-
- switch (mode) {
- case ES_MODE_STARTED:
- if ((entry_type == TYPE_FILE) || (entry_type == TYPE_DIR))
- mode = ES_MODE_GET_FILE_ENTRY;
- else
- goto err_out;
- break;
- case ES_MODE_GET_FILE_ENTRY:
- if (entry_type == TYPE_STREAM)
- mode = ES_MODE_GET_STRM_ENTRY;
- else
- goto err_out;
- break;
- case ES_MODE_GET_STRM_ENTRY:
- if (entry_type == TYPE_EXTEND)
- mode = ES_MODE_GET_NAME_ENTRY;
- else
- goto err_out;
- break;
- case ES_MODE_GET_NAME_ENTRY:
- if (entry_type == TYPE_EXTEND)
- break;
- else if (entry_type == TYPE_STREAM)
- goto err_out;
- else if (entry_type & TYPE_CRITICAL_SEC)
- mode = ES_MODE_GET_CRITICAL_SEC_ENTRY;
- else
- goto err_out;
- break;
- case ES_MODE_GET_CRITICAL_SEC_ENTRY:
- if ((entry_type == TYPE_EXTEND) ||
- (entry_type == TYPE_STREAM))
- goto err_out;
- else if ((entry_type & TYPE_CRITICAL_SEC) !=
- TYPE_CRITICAL_SEC)
- goto err_out;
- break;
- }
-
- memcpy(pos, ep, sizeof(struct dentry_t));
-
- if (--num_entries == 0)
- break;
-
- if (((off + DENTRY_SIZE) & p_bd->sector_size_mask) <
- (off & p_bd->sector_size_mask)) {
- /* get the next sector */
- if (IS_LAST_SECTOR_IN_CLUSTER(sec)) {
- if (es->alloc_flag == 0x03) {
- clu++;
- } else {
- if (exfat_fat_read(sb, clu, &clu) == -1)
- goto err_out;
- }
- sec = START_SECTOR(clu);
- } else {
- sec++;
- }
- buf = exfat_buf_getblk(sb, sec);
- if (!buf)
- goto err_out;
- off = 0;
- ep = (struct dentry_t *)(buf);
- } else {
- ep++;
- off += DENTRY_SIZE;
- }
- pos++;
- }
-
- if (file_ep)
- *file_ep = (struct dentry_t *)&es->__buf;
-
- pr_debug("%s exiting es %p sec %llu offset %d flags %d, num_entries %u buf ptr %p\n",
- __func__, es, (unsigned long long)es->sector, es->offset,
- es->alloc_flag, es->num_entries, &es->__buf);
- return es;
-err_out:
- pr_debug("%s exited NULL (es %p)\n", __func__, es);
- kfree(es);
- return NULL;
-}
-
-void release_entry_set(struct entry_set_cache_t *es)
-{
- pr_debug("%s es=%p\n", __func__, es);
- kfree(es);
-}
-
-/* search EMPTY CONTINUOUS "num_entries" entries */
-static s32 search_deleted_or_unused_entry(struct super_block *sb,
- struct chain_t *p_dir,
- s32 num_entries)
-{
- int i, dentry, num_empty = 0;
- s32 dentries_per_clu;
- u32 type;
- struct chain_t clu;
- struct dentry_t *ep;
- struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
-
- if (p_dir->dir == CLUSTER_32(0)) /* FAT16 root_dir */
- dentries_per_clu = p_fs->dentries_in_root;
- else
- dentries_per_clu = p_fs->dentries_per_clu;
-
- if (p_fs->hint_uentry.dir == p_dir->dir) {
- if (p_fs->hint_uentry.entry == -1)
- return -1;
-
- clu.dir = p_fs->hint_uentry.clu.dir;
- clu.size = p_fs->hint_uentry.clu.size;
- clu.flags = p_fs->hint_uentry.clu.flags;
-
- dentry = p_fs->hint_uentry.entry;
- } else {
- p_fs->hint_uentry.entry = -1;
-
- clu.dir = p_dir->dir;
- clu.size = p_dir->size;
- clu.flags = p_dir->flags;
-
- dentry = 0;
- }
-
- while (clu.dir != CLUSTER_32(~0)) {
- if (p_fs->dev_ejected)
- break;
-
- if (p_dir->dir == CLUSTER_32(0)) /* FAT16 root_dir */
- i = dentry % dentries_per_clu;
- else
- i = dentry & (dentries_per_clu - 1);
-
- for (; i < dentries_per_clu; i++, dentry++) {
- ep = get_entry_in_dir(sb, &clu, i, NULL);
- if (!ep)
- return -1;
-
- type = exfat_get_entry_type(ep);
-
- if (type == TYPE_UNUSED) {
- num_empty++;
- if (p_fs->hint_uentry.entry == -1) {
- p_fs->hint_uentry.dir = p_dir->dir;
- p_fs->hint_uentry.entry = dentry;
-
- p_fs->hint_uentry.clu.dir = clu.dir;
- p_fs->hint_uentry.clu.size = clu.size;
- p_fs->hint_uentry.clu.flags = clu.flags;
- }
- } else if (type == TYPE_DELETED) {
- num_empty++;
- } else {
- num_empty = 0;
- }
-
- if (num_empty >= num_entries) {
- p_fs->hint_uentry.dir = CLUSTER_32(~0);
- p_fs->hint_uentry.entry = -1;
-
- if (p_fs->vol_type == EXFAT)
- return dentry - (num_entries - 1);
- else
- return dentry;
- }
- }
-
- if (p_dir->dir == CLUSTER_32(0))
- break; /* FAT16 root_dir */
-
- if (clu.flags == 0x03) {
- if ((--clu.size) > 0)
- clu.dir++;
- else
- clu.dir = CLUSTER_32(~0);
- } else {
- if (exfat_fat_read(sb, clu.dir, &clu.dir) != 0)
- return -1;
- }
- }
-
- return -1;
-}
-
-static s32 find_empty_entry(struct inode *inode, struct chain_t *p_dir, s32 num_entries)
-{
- s32 ret, dentry;
- u32 last_clu;
- sector_t sector;
- u64 size = 0;
- struct chain_t clu;
- struct dentry_t *ep = NULL;
- struct super_block *sb = inode->i_sb;
- struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
- struct file_id_t *fid = &(EXFAT_I(inode)->fid);
-
- if (p_dir->dir == CLUSTER_32(0)) /* FAT16 root_dir */
- return search_deleted_or_unused_entry(sb, p_dir, num_entries);
-
- while ((dentry = search_deleted_or_unused_entry(sb, p_dir, num_entries)) < 0) {
- if (p_fs->dev_ejected)
- break;
-
- if (p_dir->dir != p_fs->root_dir)
- size = i_size_read(inode);
-
- last_clu = find_last_cluster(sb, p_dir);
- clu.dir = last_clu + 1;
- clu.size = 0;
- clu.flags = p_dir->flags;
-
- /* (1) allocate a cluster */
- ret = exfat_alloc_cluster(sb, 1, &clu);
- if (ret < 1)
- return -EIO;
-
- if (clear_cluster(sb, clu.dir) != 0)
- return -EIO;
-
- /* (2) append to the FAT chain */
- if (clu.flags != p_dir->flags) {
- exfat_chain_cont_cluster(sb, p_dir->dir, p_dir->size);
- p_dir->flags = 0x01;
- p_fs->hint_uentry.clu.flags = 0x01;
- }
- if (clu.flags == 0x01)
- if (exfat_fat_write(sb, last_clu, clu.dir) < 0)
- return -EIO;
-
- if (p_fs->hint_uentry.entry == -1) {
- p_fs->hint_uentry.dir = p_dir->dir;
- p_fs->hint_uentry.entry = p_dir->size << (p_fs->cluster_size_bits - DENTRY_SIZE_BITS);
-
- p_fs->hint_uentry.clu.dir = clu.dir;
- p_fs->hint_uentry.clu.size = 0;
- p_fs->hint_uentry.clu.flags = clu.flags;
- }
- p_fs->hint_uentry.clu.size++;
- p_dir->size++;
-
- /* (3) update the directory entry */
- if (p_dir->dir != p_fs->root_dir) {
- size += p_fs->cluster_size;
-
- ep = get_entry_in_dir(sb, &fid->dir,
- fid->entry + 1, §or);
- if (!ep)
- return -ENOENT;
- exfat_set_entry_size(ep, size);
- exfat_set_entry_flag(ep, p_dir->flags);
- exfat_buf_modify(sb, sector);
-
- update_dir_checksum(sb, &fid->dir,
- fid->entry);
- }
-
- i_size_write(inode, i_size_read(inode) + p_fs->cluster_size);
- EXFAT_I(inode)->mmu_private += p_fs->cluster_size;
- EXFAT_I(inode)->fid.size += p_fs->cluster_size;
- EXFAT_I(inode)->fid.flags = p_dir->flags;
- inode->i_blocks += 1 << (p_fs->cluster_size_bits - 9);
- }
-
- return dentry;
-}
-
-static s32 extract_uni_name_from_name_entry(struct name_dentry_t *ep, u16 *uniname,
- s32 order)
-{
- int i, len = 0;
-
- for (i = 0; i < 30; i += 2) {
- *uniname = GET16_A(ep->unicode_0_14 + i);
- if (*uniname == 0x0)
- return len;
- uniname++;
- len++;
- }
-
- *uniname = 0x0;
- return len;
-}
-
-/* return values of exfat_find_dir_entry()
- * >= 0 : return dir entiry position with the name in dir
- * -1 : (root dir, ".") it is the root dir itself
- * -2 : entry with the name does not exist
- */
-s32 exfat_find_dir_entry(struct super_block *sb, struct chain_t *p_dir,
- struct uni_name_t *p_uniname, s32 num_entries,
- struct dos_name_t *p_dosname, u32 type)
-{
- int i = 0, dentry = 0, num_ext_entries = 0, len, step;
- s32 order = 0;
- bool is_feasible_entry = false;
- s32 dentries_per_clu, num_empty = 0;
- u32 entry_type;
- u16 entry_uniname[16], *uniname = NULL, unichar;
- struct chain_t clu;
- struct dentry_t *ep;
- struct file_dentry_t *file_ep;
- struct strm_dentry_t *strm_ep;
- struct name_dentry_t *name_ep;
- struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
-
- if (p_dir->dir == p_fs->root_dir) {
- if ((!nls_uniname_cmp(sb, p_uniname->name,
- (u16 *)UNI_CUR_DIR_NAME)) ||
- (!nls_uniname_cmp(sb, p_uniname->name,
- (u16 *)UNI_PAR_DIR_NAME)))
- return -1; // special case, root directory itself
- }
-
- if (p_dir->dir == CLUSTER_32(0)) /* FAT16 root_dir */
- dentries_per_clu = p_fs->dentries_in_root;
- else
- dentries_per_clu = p_fs->dentries_per_clu;
-
- clu.dir = p_dir->dir;
- clu.size = p_dir->size;
- clu.flags = p_dir->flags;
-
- p_fs->hint_uentry.dir = p_dir->dir;
- p_fs->hint_uentry.entry = -1;
-
- while (clu.dir != CLUSTER_32(~0)) {
- if (p_fs->dev_ejected)
- break;
-
- while (i < dentries_per_clu) {
- ep = get_entry_in_dir(sb, &clu, i, NULL);
- if (!ep)
- return -2;
-
- entry_type = exfat_get_entry_type(ep);
- step = 1;
-
- if ((entry_type == TYPE_UNUSED) || (entry_type == TYPE_DELETED)) {
- is_feasible_entry = false;
-
- if (p_fs->hint_uentry.entry == -1) {
- num_empty++;
-
- if (num_empty == 1) {
- p_fs->hint_uentry.clu.dir = clu.dir;
- p_fs->hint_uentry.clu.size = clu.size;
- p_fs->hint_uentry.clu.flags = clu.flags;
- }
- if ((num_empty >= num_entries) || (entry_type == TYPE_UNUSED))
- p_fs->hint_uentry.entry = dentry - (num_empty - 1);
- }
-
- if (entry_type == TYPE_UNUSED)
- return -2;
- } else {
- num_empty = 0;
-
- if ((entry_type == TYPE_FILE) || (entry_type == TYPE_DIR)) {
- file_ep = (struct file_dentry_t *)ep;
- if ((type == TYPE_ALL) || (type == entry_type)) {
- num_ext_entries = file_ep->num_ext;
- is_feasible_entry = true;
- } else {
- is_feasible_entry = false;
- step = file_ep->num_ext + 1;
- }
- } else if (entry_type == TYPE_STREAM) {
- if (is_feasible_entry) {
- strm_ep = (struct strm_dentry_t *)ep;
- if (p_uniname->name_hash == GET16_A(strm_ep->name_hash) &&
- p_uniname->name_len == strm_ep->name_len) {
- order = 1;
- } else {
- is_feasible_entry = false;
- step = num_ext_entries;
- }
- }
- } else if (entry_type == TYPE_EXTEND) {
- if (is_feasible_entry) {
- name_ep = (struct name_dentry_t *)ep;
-
- if ((++order) == 2)
- uniname = p_uniname->name;
- else
- uniname += 15;
-
- len = extract_uni_name_from_name_entry(name_ep,
- entry_uniname, order);
-
- unichar = *(uniname + len);
- *(uniname + len) = 0x0;
-
- if (nls_uniname_cmp(sb, uniname, entry_uniname)) {
- is_feasible_entry = false;
- step = num_ext_entries - order + 1;
- } else if (order == num_ext_entries) {
- p_fs->hint_uentry.dir = CLUSTER_32(~0);
- p_fs->hint_uentry.entry = -1;
- return dentry - (num_ext_entries);
- }
-
- *(uniname + len) = unichar;
- }
- } else {
- is_feasible_entry = false;
- }
- }
-
- i += step;
- dentry += step;
- }
-
- i -= dentries_per_clu;
-
- if (p_dir->dir == CLUSTER_32(0))
- break; /* FAT16 root_dir */
-
- if (clu.flags == 0x03) {
- if ((--clu.size) > 0)
- clu.dir++;
- else
- clu.dir = CLUSTER_32(~0);
- } else {
- if (exfat_fat_read(sb, clu.dir, &clu.dir) != 0)
- return -2;
- }
- }
-
- return -2;
-}
-
-s32 exfat_count_ext_entries(struct super_block *sb, struct chain_t *p_dir,
- s32 entry, struct dentry_t *p_entry)
-{
- int i, count = 0;
- u32 type;
- struct file_dentry_t *file_ep = (struct file_dentry_t *)p_entry;
- struct dentry_t *ext_ep;
-
- for (i = 0, entry++; i < file_ep->num_ext; i++, entry++) {
- ext_ep = get_entry_in_dir(sb, p_dir, entry, NULL);
- if (!ext_ep)
- return -1;
-
- type = exfat_get_entry_type(ext_ep);
- if ((type == TYPE_EXTEND) || (type == TYPE_STREAM))
- count++;
- else
- return count;
- }
-
- return count;
-}
-
-s32 count_dos_name_entries(struct super_block *sb, struct chain_t *p_dir,
- u32 type)
-{
- int i, count = 0;
- s32 dentries_per_clu;
- u32 entry_type;
- struct chain_t clu;
- struct dentry_t *ep;
- struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
-
- if (p_dir->dir == CLUSTER_32(0)) /* FAT16 root_dir */
- dentries_per_clu = p_fs->dentries_in_root;
- else
- dentries_per_clu = p_fs->dentries_per_clu;
-
- clu.dir = p_dir->dir;
- clu.size = p_dir->size;
- clu.flags = p_dir->flags;
-
- while (clu.dir != CLUSTER_32(~0)) {
- if (p_fs->dev_ejected)
- break;
-
- for (i = 0; i < dentries_per_clu; i++) {
- ep = get_entry_in_dir(sb, &clu, i, NULL);
- if (!ep)
- return -ENOENT;
-
- entry_type = exfat_get_entry_type(ep);
-
- if (entry_type == TYPE_UNUSED)
- return count;
- if (!(type & TYPE_CRITICAL_PRI) &&
- !(type & TYPE_BENIGN_PRI))
- continue;
-
- if ((type == TYPE_ALL) || (type == entry_type))
- count++;
- }
-
- if (p_dir->dir == CLUSTER_32(0))
- break; /* FAT16 root_dir */
-
- if (clu.flags == 0x03) {
- if ((--clu.size) > 0)
- clu.dir++;
- else
- clu.dir = CLUSTER_32(~0);
- } else {
- if (exfat_fat_read(sb, clu.dir, &clu.dir) != 0)
- return -EIO;
- }
- }
-
- return count;
-}
-
-bool is_dir_empty(struct super_block *sb, struct chain_t *p_dir)
-{
- int i, count = 0;
- s32 dentries_per_clu;
- u32 type;
- struct chain_t clu;
- struct dentry_t *ep;
- struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
-
- if (p_dir->dir == CLUSTER_32(0)) /* FAT16 root_dir */
- dentries_per_clu = p_fs->dentries_in_root;
- else
- dentries_per_clu = p_fs->dentries_per_clu;
-
- clu.dir = p_dir->dir;
- clu.size = p_dir->size;
- clu.flags = p_dir->flags;
-
- while (clu.dir != CLUSTER_32(~0)) {
- if (p_fs->dev_ejected)
- break;
-
- for (i = 0; i < dentries_per_clu; i++) {
- ep = get_entry_in_dir(sb, &clu, i, NULL);
- if (!ep)
- break;
-
- type = exfat_get_entry_type(ep);
-
- if (type == TYPE_UNUSED)
- return true;
- if ((type != TYPE_FILE) && (type != TYPE_DIR))
- continue;
-
- if (p_dir->dir == CLUSTER_32(0)) /* FAT16 root_dir */
- return false;
-
- if (p_fs->vol_type == EXFAT)
- return false;
- if ((p_dir->dir == p_fs->root_dir) || ((++count) > 2))
- return false;
- }
-
- if (p_dir->dir == CLUSTER_32(0))
- break; /* FAT16 root_dir */
-
- if (clu.flags == 0x03) {
- if ((--clu.size) > 0)
- clu.dir++;
- else
- clu.dir = CLUSTER_32(~0);
- }
- if (exfat_fat_read(sb, clu.dir, &clu.dir) != 0)
- break;
- }
-
- return true;
-}
-
-/*
- * Name Conversion Functions
- */
-
-/* input : dir, uni_name
- * output : num_of_entry, dos_name(format : aaaaaa~1.bbb)
- */
-s32 get_num_entries_and_dos_name(struct super_block *sb, struct chain_t *p_dir,
- struct uni_name_t *p_uniname, s32 *entries,
- struct dos_name_t *p_dosname)
-{
- s32 num_entries;
-
- num_entries = exfat_calc_num_entries(p_uniname);
- if (num_entries == 0)
- return -EINVAL;
-
- *entries = num_entries;
-
- return 0;
-}
-
-void exfat_get_uni_name_from_ext_entry(struct super_block *sb,
- struct chain_t *p_dir, s32 entry,
- u16 *uniname)
-{
- int i;
- struct dentry_t *ep;
- struct entry_set_cache_t *es;
-
- es = get_entry_set_in_dir(sb, p_dir, entry, ES_ALL_ENTRIES, &ep);
- if (!es || es->num_entries < 3) {
- if (es)
- release_entry_set(es);
- return;
- }
-
- ep += 2;
-
- /*
- * First entry : file entry
- * Second entry : stream-extension entry
- * Third entry : first file-name entry
- * So, the index of first file-name dentry should start from 2.
- */
- for (i = 2; i < es->num_entries; i++, ep++) {
- if (exfat_get_entry_type(ep) == TYPE_EXTEND)
- extract_uni_name_from_name_entry((struct name_dentry_t *)
- ep, uniname, i);
- else
- goto out;
- uniname += 15;
- }
-
-out:
- release_entry_set(es);
-}
-
-s32 exfat_calc_num_entries(struct uni_name_t *p_uniname)
-{
- s32 len;
-
- len = p_uniname->name_len;
- if (len == 0)
- return 0;
-
- /* 1 file entry + 1 stream entry + name entries */
- return (len - 1) / 15 + 3;
-}
-
-u16 calc_checksum_2byte(void *data, s32 len, u16 chksum, s32 type)
-{
- int i;
- u8 *c = (u8 *)data;
-
- switch (type) {
- case CS_DIR_ENTRY:
- for (i = 0; i < len; i++, c++) {
- if ((i == 2) || (i == 3))
- continue;
- chksum = (((chksum & 1) << 15) |
- ((chksum & 0xFFFE) >> 1)) + (u16)*c;
- }
- break;
- default
- :
- for (i = 0; i < len; i++, c++)
- chksum = (((chksum & 1) << 15) |
- ((chksum & 0xFFFE) >> 1)) + (u16)*c;
- }
-
- return chksum;
-}
-
-/*
- * Name Resolution Functions
- */
-
-/* return values of resolve_path()
- * > 0 : return the length of the path
- * < 0 : return error
- */
-s32 resolve_path(struct inode *inode, char *path, struct chain_t *p_dir,
- struct uni_name_t *p_uniname)
-{
- bool lossy = false;
- struct super_block *sb = inode->i_sb;
- struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
- struct file_id_t *fid = &(EXFAT_I(inode)->fid);
-
- if (strscpy(name_buf, path, sizeof(name_buf)) < 0)
- return -EINVAL;
-
- nls_cstring_to_uniname(sb, p_uniname, name_buf, &lossy);
- if (lossy)
- return -EINVAL;
-
- fid->size = i_size_read(inode);
-
- p_dir->dir = fid->start_clu;
- p_dir->size = (s32)(fid->size >> p_fs->cluster_size_bits);
- p_dir->flags = fid->flags;
-
- return 0;
-}
-
-s32 exfat_mount(struct super_block *sb, struct pbr_sector_t *p_pbr)
-{
- struct bpbex_t *p_bpb = (struct bpbex_t *)p_pbr->bpb;
- struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
- struct bd_info_t *p_bd = &(EXFAT_SB(sb)->bd_info);
-
- if (p_bpb->num_fats == 0)
- return -EFSCORRUPTED;
-
- p_fs->sectors_per_clu = 1 << p_bpb->sectors_per_clu_bits;
- p_fs->sectors_per_clu_bits = p_bpb->sectors_per_clu_bits;
- p_fs->cluster_size_bits = p_fs->sectors_per_clu_bits +
- p_bd->sector_size_bits;
- p_fs->cluster_size = 1 << p_fs->cluster_size_bits;
-
- p_fs->num_FAT_sectors = GET32(p_bpb->fat_length);
-
- p_fs->FAT1_start_sector = p_fs->PBR_sector + GET32(p_bpb->fat_offset);
- if (p_bpb->num_fats == 1)
- p_fs->FAT2_start_sector = p_fs->FAT1_start_sector;
- else
- p_fs->FAT2_start_sector = p_fs->FAT1_start_sector +
- p_fs->num_FAT_sectors;
-
- p_fs->root_start_sector = p_fs->PBR_sector + GET32(p_bpb->clu_offset);
- p_fs->data_start_sector = p_fs->root_start_sector;
-
- p_fs->num_sectors = GET64(p_bpb->vol_length);
- p_fs->num_clusters = GET32(p_bpb->clu_count) + 2;
- /* because the cluster index starts with 2 */
-
- p_fs->vol_type = EXFAT;
- p_fs->vol_id = GET32(p_bpb->vol_serial);
-
- p_fs->root_dir = GET32(p_bpb->root_cluster);
- p_fs->dentries_in_root = 0;
- p_fs->dentries_per_clu = 1 << (p_fs->cluster_size_bits -
- DENTRY_SIZE_BITS);
-
- p_fs->vol_flag = (u32)GET16(p_bpb->vol_flags);
- p_fs->clu_srch_ptr = 2;
- p_fs->used_clusters = UINT_MAX;
-
- return 0;
-}
-
-s32 create_dir(struct inode *inode, struct chain_t *p_dir,
- struct uni_name_t *p_uniname, struct file_id_t *fid)
-{
- s32 ret, dentry, num_entries;
- u64 size;
- struct chain_t clu;
- struct dos_name_t dos_name;
- struct super_block *sb = inode->i_sb;
- struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
-
- ret = get_num_entries_and_dos_name(sb, p_dir, p_uniname, &num_entries,
- &dos_name);
- if (ret)
- return ret;
-
- /* find_empty_entry must be called before alloc_cluster */
- dentry = find_empty_entry(inode, p_dir, num_entries);
- if (dentry < 0)
- return -ENOSPC;
-
- clu.dir = CLUSTER_32(~0);
- clu.size = 0;
- clu.flags = (p_fs->vol_type == EXFAT) ? 0x03 : 0x01;
-
- /* (1) allocate a cluster */
- ret = exfat_alloc_cluster(sb, 1, &clu);
- if (ret < 0)
- return ret;
- else if (ret == 0)
- return -ENOSPC;
-
- ret = clear_cluster(sb, clu.dir);
- if (ret != 0)
- return ret;
-
- size = p_fs->cluster_size;
-
- /* (2) update the directory entry */
- /* make sub-dir entry in parent directory */
- ret = exfat_init_dir_entry(sb, p_dir, dentry, TYPE_DIR, clu.dir,
- size);
- if (ret != 0)
- return ret;
-
- ret = exfat_init_ext_entry(sb, p_dir, dentry, num_entries, p_uniname,
- &dos_name);
- if (ret != 0)
- return ret;
-
- fid->dir.dir = p_dir->dir;
- fid->dir.size = p_dir->size;
- fid->dir.flags = p_dir->flags;
- fid->entry = dentry;
-
- fid->attr = ATTR_SUBDIR;
- fid->flags = (p_fs->vol_type == EXFAT) ? 0x03 : 0x01;
- fid->size = size;
- fid->start_clu = clu.dir;
-
- fid->type = TYPE_DIR;
- fid->rwoffset = 0;
- fid->hint_last_off = -1;
-
- return 0;
-}
-
-s32 create_file(struct inode *inode, struct chain_t *p_dir,
- struct uni_name_t *p_uniname, u8 mode, struct file_id_t *fid)
-{
- s32 ret, dentry, num_entries;
- struct dos_name_t dos_name;
- struct super_block *sb = inode->i_sb;
- struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
-
- ret = get_num_entries_and_dos_name(sb, p_dir, p_uniname, &num_entries,
- &dos_name);
- if (ret)
- return ret;
-
- /* find_empty_entry must be called before alloc_cluster() */
- dentry = find_empty_entry(inode, p_dir, num_entries);
- if (dentry < 0)
- return -ENOSPC;
-
- /* (1) update the directory entry */
- /* fill the dos name directory entry information of the created file.
- * the first cluster is not determined yet. (0)
- */
- ret = exfat_init_dir_entry(sb, p_dir, dentry, TYPE_FILE | mode,
- CLUSTER_32(0), 0);
- if (ret != 0)
- return ret;
-
- ret = exfat_init_ext_entry(sb, p_dir, dentry, num_entries, p_uniname,
- &dos_name);
- if (ret != 0)
- return ret;
-
- fid->dir.dir = p_dir->dir;
- fid->dir.size = p_dir->size;
- fid->dir.flags = p_dir->flags;
- fid->entry = dentry;
-
- fid->attr = ATTR_ARCHIVE | mode;
- fid->flags = (p_fs->vol_type == EXFAT) ? 0x03 : 0x01;
- fid->size = 0;
- fid->start_clu = CLUSTER_32(~0);
-
- fid->type = TYPE_FILE;
- fid->rwoffset = 0;
- fid->hint_last_off = -1;
-
- return 0;
-}
-
-void remove_file(struct inode *inode, struct chain_t *p_dir, s32 entry)
-{
- s32 num_entries;
- sector_t sector;
- struct dentry_t *ep;
- struct super_block *sb = inode->i_sb;
-
- ep = get_entry_in_dir(sb, p_dir, entry, §or);
- if (!ep)
- return;
-
- exfat_buf_lock(sb, sector);
-
- /* exfat_buf_lock() before call count_ext_entries() */
- num_entries = exfat_count_ext_entries(sb, p_dir, entry, ep);
- if (num_entries < 0) {
- exfat_buf_unlock(sb, sector);
- return;
- }
- num_entries++;
-
- exfat_buf_unlock(sb, sector);
-
- /* (1) update the directory entry */
- exfat_delete_dir_entry(sb, p_dir, entry, 0, num_entries);
-}
-
-s32 exfat_rename_file(struct inode *inode, struct chain_t *p_dir, s32 oldentry,
- struct uni_name_t *p_uniname, struct file_id_t *fid)
-{
- s32 ret, newentry = -1, num_old_entries, num_new_entries;
- sector_t sector_old, sector_new;
- struct dos_name_t dos_name;
- struct dentry_t *epold, *epnew;
- struct super_block *sb = inode->i_sb;
-
- epold = get_entry_in_dir(sb, p_dir, oldentry, §or_old);
- if (!epold)
- return -ENOENT;
-
- exfat_buf_lock(sb, sector_old);
-
- /* exfat_buf_lock() before call count_ext_entries() */
- num_old_entries = exfat_count_ext_entries(sb, p_dir, oldentry,
- epold);
- if (num_old_entries < 0) {
- exfat_buf_unlock(sb, sector_old);
- return -ENOENT;
- }
- num_old_entries++;
-
- ret = get_num_entries_and_dos_name(sb, p_dir, p_uniname,
- &num_new_entries, &dos_name);
- if (ret) {
- exfat_buf_unlock(sb, sector_old);
- return ret;
- }
-
- if (num_old_entries < num_new_entries) {
- newentry = find_empty_entry(inode, p_dir, num_new_entries);
- if (newentry < 0) {
- exfat_buf_unlock(sb, sector_old);
- return -ENOSPC;
- }
-
- epnew = get_entry_in_dir(sb, p_dir, newentry, §or_new);
- if (!epnew) {
- exfat_buf_unlock(sb, sector_old);
- return -ENOENT;
- }
-
- memcpy((void *)epnew, (void *)epold, DENTRY_SIZE);
- if (exfat_get_entry_type(epnew) == TYPE_FILE) {
- exfat_set_entry_attr(epnew,
- exfat_get_entry_attr(epnew) |
- ATTR_ARCHIVE);
- fid->attr |= ATTR_ARCHIVE;
- }
- exfat_buf_modify(sb, sector_new);
- exfat_buf_unlock(sb, sector_old);
-
- epold = get_entry_in_dir(sb, p_dir, oldentry + 1,
- §or_old);
- exfat_buf_lock(sb, sector_old);
- epnew = get_entry_in_dir(sb, p_dir, newentry + 1,
- §or_new);
-
- if (!epold || !epnew) {
- exfat_buf_unlock(sb, sector_old);
- return -ENOENT;
- }
-
- memcpy((void *)epnew, (void *)epold, DENTRY_SIZE);
- exfat_buf_modify(sb, sector_new);
- exfat_buf_unlock(sb, sector_old);
-
- ret = exfat_init_ext_entry(sb, p_dir, newentry,
- num_new_entries, p_uniname,
- &dos_name);
- if (ret != 0)
- return ret;
-
- exfat_delete_dir_entry(sb, p_dir, oldentry, 0,
- num_old_entries);
- fid->entry = newentry;
- } else {
- if (exfat_get_entry_type(epold) == TYPE_FILE) {
- exfat_set_entry_attr(epold,
- exfat_get_entry_attr(epold) |
- ATTR_ARCHIVE);
- fid->attr |= ATTR_ARCHIVE;
- }
- exfat_buf_modify(sb, sector_old);
- exfat_buf_unlock(sb, sector_old);
-
- ret = exfat_init_ext_entry(sb, p_dir, oldentry,
- num_new_entries, p_uniname,
- &dos_name);
- if (ret != 0)
- return ret;
-
- exfat_delete_dir_entry(sb, p_dir, oldentry, num_new_entries,
- num_old_entries);
- }
-
- return 0;
-}
-
-s32 move_file(struct inode *inode, struct chain_t *p_olddir, s32 oldentry,
- struct chain_t *p_newdir, struct uni_name_t *p_uniname,
- struct file_id_t *fid)
-{
- s32 ret, newentry, num_new_entries, num_old_entries;
- sector_t sector_mov, sector_new;
- struct dos_name_t dos_name;
- struct dentry_t *epmov, *epnew;
- struct super_block *sb = inode->i_sb;
-
- epmov = get_entry_in_dir(sb, p_olddir, oldentry, §or_mov);
- if (!epmov)
- return -ENOENT;
-
- /* check if the source and target directory is the same */
- if (exfat_get_entry_type(epmov) == TYPE_DIR &&
- exfat_get_entry_clu0(epmov) == p_newdir->dir)
- return -EINVAL;
-
- exfat_buf_lock(sb, sector_mov);
-
- /* exfat_buf_lock() before call count_ext_entries() */
- num_old_entries = exfat_count_ext_entries(sb, p_olddir, oldentry,
- epmov);
- if (num_old_entries < 0) {
- exfat_buf_unlock(sb, sector_mov);
- return -ENOENT;
- }
- num_old_entries++;
-
- ret = get_num_entries_and_dos_name(sb, p_newdir, p_uniname,
- &num_new_entries, &dos_name);
- if (ret) {
- exfat_buf_unlock(sb, sector_mov);
- return ret;
- }
-
- newentry = find_empty_entry(inode, p_newdir, num_new_entries);
- if (newentry < 0) {
- exfat_buf_unlock(sb, sector_mov);
- return -ENOSPC;
- }
-
- epnew = get_entry_in_dir(sb, p_newdir, newentry, §or_new);
- if (!epnew) {
- exfat_buf_unlock(sb, sector_mov);
- return -ENOENT;
- }
-
- memcpy((void *)epnew, (void *)epmov, DENTRY_SIZE);
- if (exfat_get_entry_type(epnew) == TYPE_FILE) {
- exfat_set_entry_attr(epnew, exfat_get_entry_attr(epnew) |
- ATTR_ARCHIVE);
- fid->attr |= ATTR_ARCHIVE;
- }
- exfat_buf_modify(sb, sector_new);
- exfat_buf_unlock(sb, sector_mov);
-
- epmov = get_entry_in_dir(sb, p_olddir, oldentry + 1,
- §or_mov);
- exfat_buf_lock(sb, sector_mov);
- epnew = get_entry_in_dir(sb, p_newdir, newentry + 1,
- §or_new);
- if (!epmov || !epnew) {
- exfat_buf_unlock(sb, sector_mov);
- return -ENOENT;
- }
-
- memcpy((void *)epnew, (void *)epmov, DENTRY_SIZE);
- exfat_buf_modify(sb, sector_new);
- exfat_buf_unlock(sb, sector_mov);
-
- ret = exfat_init_ext_entry(sb, p_newdir, newentry, num_new_entries,
- p_uniname, &dos_name);
- if (ret != 0)
- return ret;
-
- exfat_delete_dir_entry(sb, p_olddir, oldentry, 0, num_old_entries);
-
- fid->dir.dir = p_newdir->dir;
- fid->dir.size = p_newdir->size;
- fid->dir.flags = p_newdir->flags;
-
- fid->entry = newentry;
-
- return 0;
-}
-
-/*
- * Sector Read/Write Functions
- */
-
-int sector_read(struct super_block *sb, sector_t sec, struct buffer_head **bh,
- bool read)
-{
- s32 ret = -EIO;
- struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
-
- if ((sec >= (p_fs->PBR_sector + p_fs->num_sectors)) &&
- (p_fs->num_sectors > 0)) {
- pr_err("[EXFAT] %s: out of range error! (sec = %llu)\n",
- __func__, (unsigned long long)sec);
- fs_error(sb);
- return ret;
- }
-
- if (!p_fs->dev_ejected) {
- ret = exfat_bdev_read(sb, sec, bh, 1, read);
- if (ret != 0)
- p_fs->dev_ejected = 1;
- }
-
- return ret;
-}
-
-int sector_write(struct super_block *sb, sector_t sec, struct buffer_head *bh,
- bool sync)
-{
- s32 ret = -EIO;
- struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
-
- if (sec >= (p_fs->PBR_sector + p_fs->num_sectors) &&
- (p_fs->num_sectors > 0)) {
- pr_err("[EXFAT] %s: out of range error! (sec = %llu)\n",
- __func__, (unsigned long long)sec);
- fs_error(sb);
- return ret;
- }
-
- if (!bh) {
- pr_err("[EXFAT] %s: bh is NULL!\n", __func__);
- fs_error(sb);
- return ret;
- }
-
- if (!p_fs->dev_ejected) {
- ret = exfat_bdev_write(sb, sec, bh, 1, sync);
- if (ret != 0)
- p_fs->dev_ejected = 1;
- }
-
- return ret;
-}
-
-int multi_sector_read(struct super_block *sb, sector_t sec,
- struct buffer_head **bh, s32 num_secs, bool read)
-{
- s32 ret = -EIO;
- struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
-
- if (((sec + num_secs) > (p_fs->PBR_sector + p_fs->num_sectors)) &&
- (p_fs->num_sectors > 0)) {
- pr_err("[EXFAT] %s: out of range error! (sec = %llu, num_secs = %d)\n",
- __func__, (unsigned long long)sec, num_secs);
- fs_error(sb);
- return ret;
- }
-
- if (!p_fs->dev_ejected) {
- ret = exfat_bdev_read(sb, sec, bh, num_secs, read);
- if (ret != 0)
- p_fs->dev_ejected = 1;
- }
-
- return ret;
-}
-
-int multi_sector_write(struct super_block *sb, sector_t sec,
- struct buffer_head *bh, s32 num_secs, bool sync)
-{
- s32 ret = -EIO;
- struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
-
- if ((sec + num_secs) > (p_fs->PBR_sector + p_fs->num_sectors) &&
- (p_fs->num_sectors > 0)) {
- pr_err("[EXFAT] %s: out of range error! (sec = %llu, num_secs = %d)\n",
- __func__, (unsigned long long)sec, num_secs);
- fs_error(sb);
- return ret;
- }
- if (!bh) {
- pr_err("[EXFAT] %s: bh is NULL!\n", __func__);
- fs_error(sb);
- return ret;
- }
-
- if (!p_fs->dev_ejected) {
- ret = exfat_bdev_write(sb, sec, bh, num_secs, sync);
- if (ret != 0)
- p_fs->dev_ejected = 1;
- }
-
- return ret;
-}
diff -Nurp linux-5.6.3.orig/drivers/staging/exfat/exfat.h linux-5.6.3/drivers/staging/exfat/exfat.h
--- linux-5.6.3.orig/drivers/staging/exfat/exfat.h 2020-03-30 01:25:41.000000000 +0300
+++ linux-5.6.3/drivers/staging/exfat/exfat.h 1970-01-01 02:00:00.000000000 +0200
@@ -1,824 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0-or-later */
-/*
- * Copyright (C) 2012-2013 Samsung Electronics Co., Ltd.
- */
-
-#ifndef _EXFAT_H
-#define _EXFAT_H
-
-#include <linux/types.h>
-#include <linux/buffer_head.h>
-
-#ifdef CONFIG_STAGING_EXFAT_KERNEL_DEBUG
- /* For Debugging Purpose */
- /* IOCTL code 'f' used by
- * - file systems typically #0~0x1F
- * - embedded terminal devices #128~
- * - exts for debugging purpose #99
- * number 100 and 101 is available now but has possible conflicts
- */
-#define EXFAT_IOC_GET_DEBUGFLAGS _IOR('f', 100, long)
-#define EXFAT_IOC_SET_DEBUGFLAGS _IOW('f', 101, long)
-
-#define EXFAT_DEBUGFLAGS_INVALID_UMOUNT 0x01
-#define EXFAT_DEBUGFLAGS_ERROR_RW 0x02
-#endif /* CONFIG_STAGING_EXFAT_KERNEL_DEBUG */
-
-#ifdef CONFIG_STAGING_EXFAT_DEBUG_MSG
-#define DEBUG 1
-#else
-#undef DEBUG
-#endif
-
-#define EFSCORRUPTED EUCLEAN /* Filesystem is corrupted */
-
-#define DENTRY_SIZE 32 /* dir entry size */
-#define DENTRY_SIZE_BITS 5
-
-/* PBR entries */
-#define PBR_SIGNATURE 0xAA55
-#define EXT_SIGNATURE 0xAA550000
-#define VOL_LABEL "NO NAME " /* size should be 11 */
-#define OEM_NAME "MSWIN4.1" /* size should be 8 */
-#define STR_FAT12 "FAT12 " /* size should be 8 */
-#define STR_FAT16 "FAT16 " /* size should be 8 */
-#define STR_FAT32 "FAT32 " /* size should be 8 */
-#define STR_EXFAT "EXFAT " /* size should be 8 */
-#define VOL_CLEAN 0x0000
-#define VOL_DIRTY 0x0002
-
-/* max number of clusters */
-#define FAT12_THRESHOLD 4087 /* 2^12 - 1 + 2 (clu 0 & 1) */
-#define FAT16_THRESHOLD 65527 /* 2^16 - 1 + 2 */
-#define FAT32_THRESHOLD 268435457 /* 2^28 - 1 + 2 */
-#define EXFAT_THRESHOLD 268435457 /* 2^28 - 1 + 2 */
-
-/* file types */
-#define TYPE_UNUSED 0x0000
-#define TYPE_DELETED 0x0001
-#define TYPE_INVALID 0x0002
-#define TYPE_CRITICAL_PRI 0x0100
-#define TYPE_BITMAP 0x0101
-#define TYPE_UPCASE 0x0102
-#define TYPE_VOLUME 0x0103
-#define TYPE_DIR 0x0104
-#define TYPE_FILE 0x011F
-#define TYPE_SYMLINK 0x015F
-#define TYPE_CRITICAL_SEC 0x0200
-#define TYPE_STREAM 0x0201
-#define TYPE_EXTEND 0x0202
-#define TYPE_ACL 0x0203
-#define TYPE_BENIGN_PRI 0x0400
-#define TYPE_GUID 0x0401
-#define TYPE_PADDING 0x0402
-#define TYPE_ACLTAB 0x0403
-#define TYPE_BENIGN_SEC 0x0800
-#define TYPE_ALL 0x0FFF
-
-/* time modes */
-#define TM_CREATE 0
-#define TM_MODIFY 1
-#define TM_ACCESS 2
-
-/* checksum types */
-#define CS_DIR_ENTRY 0
-#define CS_PBR_SECTOR 1
-#define CS_DEFAULT 2
-
-#define CLUSTER_16(x) ((u16)(x))
-#define CLUSTER_32(x) ((u32)(x))
-
-#define START_SECTOR(x) \
- ((((sector_t)((x) - 2)) << p_fs->sectors_per_clu_bits) + \
- p_fs->data_start_sector)
-
-#define IS_LAST_SECTOR_IN_CLUSTER(sec) \
- ((((sec) - p_fs->data_start_sector + 1) & \
- ((1 << p_fs->sectors_per_clu_bits) - 1)) == 0)
-
-#define GET_CLUSTER_FROM_SECTOR(sec) \
- ((u32)((((sec) - p_fs->data_start_sector) >> \
- p_fs->sectors_per_clu_bits) + 2))
-
-#define GET16(p_src) \
- (((u16)(p_src)[0]) | (((u16)(p_src)[1]) << 8))
-#define GET32(p_src) \
- (((u32)(p_src)[0]) | (((u32)(p_src)[1]) << 8) | \
- (((u32)(p_src)[2]) << 16) | (((u32)(p_src)[3]) << 24))
-#define GET64(p_src) \
- (((u64)(p_src)[0]) | (((u64)(p_src)[1]) << 8) | \
- (((u64)(p_src)[2]) << 16) | (((u64)(p_src)[3]) << 24) | \
- (((u64)(p_src)[4]) << 32) | (((u64)(p_src)[5]) << 40) | \
- (((u64)(p_src)[6]) << 48) | (((u64)(p_src)[7]) << 56))
-
-#define SET16(p_dst, src) \
- do { \
- (p_dst)[0] = (u8)(src); \
- (p_dst)[1] = (u8)(((u16)(src)) >> 8); \
- } while (0)
-#define SET32(p_dst, src) \
- do { \
- (p_dst)[0] = (u8)(src); \
- (p_dst)[1] = (u8)(((u32)(src)) >> 8); \
- (p_dst)[2] = (u8)(((u32)(src)) >> 16); \
- (p_dst)[3] = (u8)(((u32)(src)) >> 24); \
- } while (0)
-#define SET64(p_dst, src) \
- do { \
- (p_dst)[0] = (u8)(src); \
- (p_dst)[1] = (u8)(((u64)(src)) >> 8); \
- (p_dst)[2] = (u8)(((u64)(src)) >> 16); \
- (p_dst)[3] = (u8)(((u64)(src)) >> 24); \
- (p_dst)[4] = (u8)(((u64)(src)) >> 32); \
- (p_dst)[5] = (u8)(((u64)(src)) >> 40); \
- (p_dst)[6] = (u8)(((u64)(src)) >> 48); \
- (p_dst)[7] = (u8)(((u64)(src)) >> 56); \
- } while (0)
-
-#ifdef __LITTLE_ENDIAN
-#define GET16_A(p_src) (*((u16 *)(p_src)))
-#define GET32_A(p_src) (*((u32 *)(p_src)))
-#define GET64_A(p_src) (*((u64 *)(p_src)))
-#define SET16_A(p_dst, src) (*((u16 *)(p_dst)) = (u16)(src))
-#define SET32_A(p_dst, src) (*((u32 *)(p_dst)) = (u32)(src))
-#define SET64_A(p_dst, src) (*((u64 *)(p_dst)) = (u64)(src))
-#else /* BIG_ENDIAN */
-#define GET16_A(p_src) GET16(p_src)
-#define GET32_A(p_src) GET32(p_src)
-#define GET64_A(p_src) GET64(p_src)
-#define SET16_A(p_dst, src) SET16(p_dst, src)
-#define SET32_A(p_dst, src) SET32(p_dst, src)
-#define SET64_A(p_dst, src) SET64(p_dst, src)
-#endif
-
-/* cache size (in number of sectors) */
-/* (should be an exponential value of 2) */
-#define FAT_CACHE_SIZE 128
-#define FAT_CACHE_HASH_SIZE 64
-#define BUF_CACHE_SIZE 256
-#define BUF_CACHE_HASH_SIZE 64
-
-/* Upcase table macro */
-#define HIGH_INDEX_BIT (8)
-#define HIGH_INDEX_MASK (0xFF00)
-#define LOW_INDEX_BIT (16 - HIGH_INDEX_BIT)
-#define UTBL_ROW_COUNT BIT(LOW_INDEX_BIT)
-#define UTBL_COL_COUNT BIT(HIGH_INDEX_BIT)
-
-static inline u16 get_col_index(u16 i)
-{
- return i >> LOW_INDEX_BIT;
-}
-
-static inline u16 get_row_index(u16 i)
-{
- return i & ~HIGH_INDEX_MASK;
-}
-
-#define EXFAT_SUPER_MAGIC (0x2011BAB0L)
-#define EXFAT_ROOT_INO 1
-
-/* FAT types */
-#define FAT12 0x01 /* FAT12 */
-#define FAT16 0x0E /* Win95 FAT16 (LBA) */
-#define FAT32 0x0C /* Win95 FAT32 (LBA) */
-#define EXFAT 0x07 /* exFAT */
-
-/* file name lengths */
-#define MAX_CHARSET_SIZE 3 /* max size of multi-byte character */
-#define MAX_PATH_DEPTH 15 /* max depth of path name */
-#define MAX_NAME_LENGTH 256 /* max len of filename including NULL */
-#define MAX_PATH_LENGTH 260 /* max len of pathname including NULL */
-#define DOS_NAME_LENGTH 11 /* DOS filename length excluding NULL */
-#define DOS_PATH_LENGTH 80 /* DOS pathname length excluding NULL */
-
-/* file attributes */
-#define ATTR_NORMAL 0x0000
-#define ATTR_READONLY 0x0001
-#define ATTR_HIDDEN 0x0002
-#define ATTR_SYSTEM 0x0004
-#define ATTR_VOLUME 0x0008
-#define ATTR_SUBDIR 0x0010
-#define ATTR_ARCHIVE 0x0020
-#define ATTR_SYMLINK 0x0040
-#define ATTR_EXTEND 0x000F
-#define ATTR_RWMASK 0x007E
-
-/* file creation modes */
-#define FM_REGULAR 0x00
-#define FM_SYMLINK 0x40
-
-#define NUM_UPCASE 2918
-
-#define DOS_CUR_DIR_NAME ". "
-#define DOS_PAR_DIR_NAME ".. "
-
-#ifdef __LITTLE_ENDIAN
-#define UNI_CUR_DIR_NAME ".\0"
-#define UNI_PAR_DIR_NAME ".\0.\0"
-#else
-#define UNI_CUR_DIR_NAME "\0."
-#define UNI_PAR_DIR_NAME "\0.\0."
-#endif
-
-struct date_time_t {
- u16 Year;
- u16 Month;
- u16 Day;
- u16 Hour;
- u16 Minute;
- u16 Second;
- u16 MilliSecond;
-};
-
-struct part_info_t {
- u32 Offset; /* start sector number of the partition */
- u32 Size; /* in sectors */
-};
-
-struct dev_info_t {
- u32 SecSize; /* sector size in bytes */
- u32 DevSize; /* block device size in sectors */
-};
-
-struct vol_info_t {
- u32 FatType;
- u32 ClusterSize;
- u32 NumClusters;
- u32 FreeClusters;
- u32 UsedClusters;
-};
-
-/* directory structure */
-struct chain_t {
- u32 dir;
- s32 size;
- u8 flags;
-};
-
-struct file_id_t {
- struct chain_t dir;
- s32 entry;
- u32 type;
- u32 attr;
- u32 start_clu;
- u64 size;
- u8 flags;
- s64 rwoffset;
- s32 hint_last_off;
- u32 hint_last_clu;
-};
-
-struct dir_entry_t {
- char Name[MAX_NAME_LENGTH * MAX_CHARSET_SIZE];
-
- /* used only for FAT12/16/32, not used for exFAT */
- char ShortName[DOS_NAME_LENGTH + 2];
-
- u32 Attr;
- u64 Size;
- u32 NumSubdirs;
- struct date_time_t CreateTimestamp;
- struct date_time_t ModifyTimestamp;
- struct date_time_t AccessTimestamp;
-};
-
-struct timestamp_t {
- u16 sec; /* 0 ~ 59 */
- u16 min; /* 0 ~ 59 */
- u16 hour; /* 0 ~ 23 */
- u16 day; /* 1 ~ 31 */
- u16 mon; /* 1 ~ 12 */
- u16 year; /* 0 ~ 127 (since 1980) */
-};
-
-/* MS_DOS FAT partition boot record (512 bytes) */
-struct pbr_sector_t {
- u8 jmp_boot[3];
- u8 oem_name[8];
- u8 bpb[109];
- u8 boot_code[390];
- u8 signature[2];
-};
-
-/* MS-DOS FAT12/16 BIOS parameter block (51 bytes) */
-struct bpb16_t {
- u8 sector_size[2];
- u8 sectors_per_clu;
- u8 num_reserved[2];
- u8 num_fats;
- u8 num_root_entries[2];
- u8 num_sectors[2];
- u8 media_type;
- u8 num_fat_sectors[2];
- u8 sectors_in_track[2];
- u8 num_heads[2];
- u8 num_hid_sectors[4];
- u8 num_huge_sectors[4];
-
- u8 phy_drv_no;
- u8 reserved;
- u8 ext_signature;
- u8 vol_serial[4];
- u8 vol_label[11];
- u8 vol_type[8];
-};
-
-/* MS-DOS FAT32 BIOS parameter block (79 bytes) */
-struct bpb32_t {
- u8 sector_size[2];
- u8 sectors_per_clu;
- u8 num_reserved[2];
- u8 num_fats;
- u8 num_root_entries[2];
- u8 num_sectors[2];
- u8 media_type;
- u8 num_fat_sectors[2];
- u8 sectors_in_track[2];
- u8 num_heads[2];
- u8 num_hid_sectors[4];
- u8 num_huge_sectors[4];
- u8 num_fat32_sectors[4];
- u8 ext_flags[2];
- u8 fs_version[2];
- u8 root_cluster[4];
- u8 fsinfo_sector[2];
- u8 backup_sector[2];
- u8 reserved[12];
-
- u8 phy_drv_no;
- u8 ext_reserved;
- u8 ext_signature;
- u8 vol_serial[4];
- u8 vol_label[11];
- u8 vol_type[8];
-};
-
-/* MS-DOS EXFAT BIOS parameter block (109 bytes) */
-struct bpbex_t {
- u8 reserved1[53];
- u8 vol_offset[8];
- u8 vol_length[8];
- u8 fat_offset[4];
- u8 fat_length[4];
- u8 clu_offset[4];
- u8 clu_count[4];
- u8 root_cluster[4];
- u8 vol_serial[4];
- u8 fs_version[2];
- u8 vol_flags[2];
- u8 sector_size_bits;
- u8 sectors_per_clu_bits;
- u8 num_fats;
- u8 phy_drv_no;
- u8 perc_in_use;
- u8 reserved2[7];
-};
-
-/* MS-DOS FAT file system information sector (512 bytes) */
-struct fsi_sector_t {
- u8 signature1[4];
- u8 reserved1[480];
- u8 signature2[4];
- u8 free_cluster[4];
- u8 next_cluster[4];
- u8 reserved2[14];
- u8 signature3[2];
-};
-
-/* MS-DOS FAT directory entry (32 bytes) */
-struct dentry_t {
- u8 dummy[32];
-};
-
-struct dos_dentry_t {
- u8 name[DOS_NAME_LENGTH];
- u8 attr;
- u8 lcase;
- u8 create_time_ms;
- u8 create_time[2];
- u8 create_date[2];
- u8 access_date[2];
- u8 start_clu_hi[2];
- u8 modify_time[2];
- u8 modify_date[2];
- u8 start_clu_lo[2];
- u8 size[4];
-};
-
-/* MS-DOS FAT extended directory entry (32 bytes) */
-struct ext_dentry_t {
- u8 order;
- u8 unicode_0_4[10];
- u8 attr;
- u8 sysid;
- u8 checksum;
- u8 unicode_5_10[12];
- u8 start_clu[2];
- u8 unicode_11_12[4];
-};
-
-/* MS-DOS EXFAT file directory entry (32 bytes) */
-struct file_dentry_t {
- u8 type;
- u8 num_ext;
- u8 checksum[2];
- u8 attr[2];
- u8 reserved1[2];
- u8 create_time[2];
- u8 create_date[2];
- u8 modify_time[2];
- u8 modify_date[2];
- u8 access_time[2];
- u8 access_date[2];
- u8 create_time_ms;
- u8 modify_time_ms;
- u8 access_time_ms;
- u8 reserved2[9];
-};
-
-/* MS-DOS EXFAT stream extension directory entry (32 bytes) */
-struct strm_dentry_t {
- u8 type;
- u8 flags;
- u8 reserved1;
- u8 name_len;
- u8 name_hash[2];
- u8 reserved2[2];
- u8 valid_size[8];
- u8 reserved3[4];
- u8 start_clu[4];
- u8 size[8];
-};
-
-/* MS-DOS EXFAT file name directory entry (32 bytes) */
-struct name_dentry_t {
- u8 type;
- u8 flags;
- u8 unicode_0_14[30];
-};
-
-/* MS-DOS EXFAT allocation bitmap directory entry (32 bytes) */
-struct bmap_dentry_t {
- u8 type;
- u8 flags;
- u8 reserved[18];
- u8 start_clu[4];
- u8 size[8];
-};
-
-/* MS-DOS EXFAT up-case table directory entry (32 bytes) */
-struct case_dentry_t {
- u8 type;
- u8 reserved1[3];
- u8 checksum[4];
- u8 reserved2[12];
- u8 start_clu[4];
- u8 size[8];
-};
-
-/* MS-DOS EXFAT volume label directory entry (32 bytes) */
-struct volm_dentry_t {
- u8 type;
- u8 label_len;
- u8 unicode_0_10[22];
- u8 reserved[8];
-};
-
-/* unused entry hint information */
-struct uentry_t {
- u32 dir;
- s32 entry;
- struct chain_t clu;
-};
-
-/* DOS name structure */
-struct dos_name_t {
- u8 name[DOS_NAME_LENGTH];
- u8 name_case;
-};
-
-/* unicode name structure */
-struct uni_name_t {
- u16 name[MAX_NAME_LENGTH];
- u16 name_hash;
- u8 name_len;
-};
-
-struct buf_cache_t {
- struct buf_cache_t *next;
- struct buf_cache_t *prev;
- struct buf_cache_t *hash_next;
- struct buf_cache_t *hash_prev;
- s32 drv;
- sector_t sec;
- u32 flag;
- struct buffer_head *buf_bh;
-};
-
-struct fs_info_t {
- u32 drv; /* drive ID */
- u32 vol_type; /* volume FAT type */
- u32 vol_id; /* volume serial number */
-
- u64 num_sectors; /* num of sectors in volume */
- u32 num_clusters; /* num of clusters in volume */
- u32 cluster_size; /* cluster size in bytes */
- u32 cluster_size_bits;
- u32 sectors_per_clu; /* cluster size in sectors */
- u32 sectors_per_clu_bits;
-
- u32 PBR_sector; /* PBR sector */
- u32 FAT1_start_sector; /* FAT1 start sector */
- u32 FAT2_start_sector; /* FAT2 start sector */
- u32 root_start_sector; /* root dir start sector */
- u32 data_start_sector; /* data area start sector */
- u32 num_FAT_sectors; /* num of FAT sectors */
-
- u32 root_dir; /* root dir cluster */
- u32 dentries_in_root; /* num of dentries in root dir */
- u32 dentries_per_clu; /* num of dentries per cluster */
-
- u32 vol_flag; /* volume dirty flag */
- struct buffer_head *pbr_bh; /* PBR sector */
-
- u32 map_clu; /* allocation bitmap start cluster */
- u32 map_sectors; /* num of allocation bitmap sectors */
- struct buffer_head **vol_amap; /* allocation bitmap */
-
- u16 **vol_utbl; /* upcase table */
-
- u32 clu_srch_ptr; /* cluster search pointer */
- u32 used_clusters; /* number of used clusters */
- struct uentry_t hint_uentry; /* unused entry hint information */
-
- u32 dev_ejected; /* block device operation error flag */
-
- struct mutex v_mutex;
-
- /* FAT cache */
- struct buf_cache_t FAT_cache_array[FAT_CACHE_SIZE];
- struct buf_cache_t FAT_cache_lru_list;
- struct buf_cache_t FAT_cache_hash_list[FAT_CACHE_HASH_SIZE];
-
- /* buf cache */
- struct buf_cache_t buf_cache_array[BUF_CACHE_SIZE];
- struct buf_cache_t buf_cache_lru_list;
- struct buf_cache_t buf_cache_hash_list[BUF_CACHE_HASH_SIZE];
-};
-
-#define ES_2_ENTRIES 2
-#define ES_3_ENTRIES 3
-#define ES_ALL_ENTRIES 0
-
-struct entry_set_cache_t {
- /* sector number that contains file_entry */
- sector_t sector;
-
- /* byte offset in the sector */
- s32 offset;
-
- /*
- * flag in stream entry.
- * 01 for cluster chain,
- * 03 for contig. clusteres.
- */
- s32 alloc_flag;
-
- u32 num_entries;
-
- /* __buf should be the last member */
- void *__buf;
-};
-
-#define EXFAT_ERRORS_CONT 1 /* ignore error and continue */
-#define EXFAT_ERRORS_PANIC 2 /* panic on error */
-#define EXFAT_ERRORS_RO 3 /* remount r/o on error */
-
-/* ioctl command */
-#define EXFAT_IOCTL_GET_VOLUME_ID _IOR('r', 0x12, __u32)
-
-struct exfat_mount_options {
- kuid_t fs_uid;
- kgid_t fs_gid;
- unsigned short fs_fmask;
- unsigned short fs_dmask;
-
- /* permission for setting the [am]time */
- unsigned short allow_utime;
-
- /* codepage for shortname conversions */
- unsigned short codepage;
-
- /* charset for filename input/display */
- char *iocharset;
-
- unsigned char casesensitive;
-
- /* on error: continue, panic, remount-ro */
- unsigned char errors;
-#ifdef CONFIG_STAGING_EXFAT_DISCARD
- /* flag on if -o dicard specified and device support discard() */
- unsigned char discard;
-#endif /* CONFIG_STAGING_EXFAT_DISCARD */
-};
-
-#define EXFAT_HASH_BITS 8
-#define EXFAT_HASH_SIZE BIT(EXFAT_HASH_BITS)
-
-/*
- * EXFAT file system in-core superblock data
- */
-struct bd_info_t {
- s32 sector_size; /* in bytes */
- s32 sector_size_bits;
- s32 sector_size_mask;
-
- /* total number of sectors in this block device */
- s32 num_sectors;
-
- /* opened or not */
- bool opened;
-};
-
-struct exfat_sb_info {
- struct fs_info_t fs_info;
- struct bd_info_t bd_info;
-
- struct exfat_mount_options options;
-
- int s_dirt;
- struct mutex s_lock;
- struct nls_table *nls_disk; /* Codepage used on disk */
- struct nls_table *nls_io; /* Charset used for input and display */
-
- struct inode *fat_inode;
-
- spinlock_t inode_hash_lock;
- struct hlist_head inode_hashtable[EXFAT_HASH_SIZE];
-#ifdef CONFIG_STAGING_EXFAT_KERNEL_DEBUG
- long debug_flags;
-#endif /* CONFIG_STAGING_EXFAT_KERNEL_DEBUG */
-};
-
-/*
- * EXFAT file system inode data in memory
- */
-struct exfat_inode_info {
- struct file_id_t fid;
- char *target;
- /* NOTE: mmu_private is 64bits, so must hold ->i_mutex to access */
- loff_t mmu_private; /* physically allocated size */
- loff_t i_pos; /* on-disk position of directory entry or 0 */
- struct hlist_node i_hash_fat; /* hash by i_location */
- struct rw_semaphore truncate_lock;
- struct inode vfs_inode;
- struct rw_semaphore i_alloc_sem; /* protect bmap against truncate */
-};
-
-#define EXFAT_SB(sb) ((struct exfat_sb_info *)((sb)->s_fs_info))
-
-static inline struct exfat_inode_info *EXFAT_I(struct inode *inode)
-{
- return container_of(inode, struct exfat_inode_info, vfs_inode);
-}
-
-/* NLS management function */
-u16 nls_upper(struct super_block *sb, u16 a);
-int nls_uniname_cmp(struct super_block *sb, u16 *a, u16 *b);
-void nls_uniname_to_cstring(struct super_block *sb, u8 *p_cstring,
- struct uni_name_t *p_uniname);
-void nls_cstring_to_uniname(struct super_block *sb,
- struct uni_name_t *p_uniname, u8 *p_cstring,
- bool *p_lossy);
-
-/* buffer cache management */
-void exfat_buf_init(struct super_block *sb);
-void exfat_buf_shutdown(struct super_block *sb);
-int exfat_fat_read(struct super_block *sb, u32 loc, u32 *content);
-s32 exfat_fat_write(struct super_block *sb, u32 loc, u32 content);
-u8 *exfat_fat_getblk(struct super_block *sb, sector_t sec);
-void exfat_fat_modify(struct super_block *sb, sector_t sec);
-void exfat_fat_release_all(struct super_block *sb);
-void exfat_fat_sync(struct super_block *sb);
-u8 *exfat_buf_getblk(struct super_block *sb, sector_t sec);
-void exfat_buf_modify(struct super_block *sb, sector_t sec);
-void exfat_buf_lock(struct super_block *sb, sector_t sec);
-void exfat_buf_unlock(struct super_block *sb, sector_t sec);
-void exfat_buf_release(struct super_block *sb, sector_t sec);
-void exfat_buf_release_all(struct super_block *sb);
-void exfat_buf_sync(struct super_block *sb);
-
-/* fs management functions */
-void fs_set_vol_flags(struct super_block *sb, u32 new_flag);
-void fs_error(struct super_block *sb);
-
-/* cluster management functions */
-s32 count_num_clusters(struct super_block *sb, struct chain_t *dir);
-void exfat_chain_cont_cluster(struct super_block *sb, u32 chain, s32 len);
-
-/* allocation bitmap management functions */
-s32 load_alloc_bitmap(struct super_block *sb);
-void free_alloc_bitmap(struct super_block *sb);
-void sync_alloc_bitmap(struct super_block *sb);
-
-/* upcase table management functions */
-s32 load_upcase_table(struct super_block *sb);
-void free_upcase_table(struct super_block *sb);
-
-/* dir entry management functions */
-struct timestamp_t *tm_current(struct timestamp_t *tm);
-
-struct dentry_t *get_entry_in_dir(struct super_block *sb, struct chain_t *p_dir,
- s32 entry, sector_t *sector);
-struct entry_set_cache_t *get_entry_set_in_dir(struct super_block *sb,
- struct chain_t *p_dir, s32 entry,
- u32 type,
- struct dentry_t **file_ep);
-void release_entry_set(struct entry_set_cache_t *es);
-s32 count_dos_name_entries(struct super_block *sb, struct chain_t *p_dir,
- u32 type);
-void update_dir_checksum(struct super_block *sb, struct chain_t *p_dir,
- s32 entry);
-void update_dir_checksum_with_entry_set(struct super_block *sb,
- struct entry_set_cache_t *es);
-bool is_dir_empty(struct super_block *sb, struct chain_t *p_dir);
-
-/* name conversion functions */
-s32 get_num_entries_and_dos_name(struct super_block *sb, struct chain_t *p_dir,
- struct uni_name_t *p_uniname, s32 *entries,
- struct dos_name_t *p_dosname);
-u16 calc_checksum_2byte(void *data, s32 len, u16 chksum, s32 type);
-
-/* name resolution functions */
-s32 resolve_path(struct inode *inode, char *path, struct chain_t *p_dir,
- struct uni_name_t *p_uniname);
-
-/* file operation functions */
-s32 exfat_mount(struct super_block *sb, struct pbr_sector_t *p_pbr);
-s32 create_dir(struct inode *inode, struct chain_t *p_dir,
- struct uni_name_t *p_uniname, struct file_id_t *fid);
-s32 create_file(struct inode *inode, struct chain_t *p_dir,
- struct uni_name_t *p_uniname, u8 mode, struct file_id_t *fid);
-void remove_file(struct inode *inode, struct chain_t *p_dir, s32 entry);
-s32 exfat_rename_file(struct inode *inode, struct chain_t *p_dir, s32 old_entry,
- struct uni_name_t *p_uniname, struct file_id_t *fid);
-s32 move_file(struct inode *inode, struct chain_t *p_olddir, s32 oldentry,
- struct chain_t *p_newdir, struct uni_name_t *p_uniname,
- struct file_id_t *fid);
-
-/* sector read/write functions */
-int sector_read(struct super_block *sb, sector_t sec,
- struct buffer_head **bh, bool read);
-int sector_write(struct super_block *sb, sector_t sec,
- struct buffer_head *bh, bool sync);
-int multi_sector_read(struct super_block *sb, sector_t sec,
- struct buffer_head **bh, s32 num_secs, bool read);
-int multi_sector_write(struct super_block *sb, sector_t sec,
- struct buffer_head *bh, s32 num_secs, bool sync);
-
-void exfat_bdev_open(struct super_block *sb);
-void exfat_bdev_close(struct super_block *sb);
-int exfat_bdev_read(struct super_block *sb, sector_t secno,
- struct buffer_head **bh, u32 num_secs, bool read);
-int exfat_bdev_write(struct super_block *sb, sector_t secno,
- struct buffer_head *bh, u32 num_secs, bool sync);
-int exfat_bdev_sync(struct super_block *sb);
-
-/* cluster operation functions */
-s32 exfat_alloc_cluster(struct super_block *sb, s32 num_alloc,
- struct chain_t *p_chain);
-void exfat_free_cluster(struct super_block *sb, struct chain_t *p_chain,
- s32 do_relse);
-s32 exfat_count_used_clusters(struct super_block *sb);
-
-/* dir operation functions */
-s32 exfat_find_dir_entry(struct super_block *sb, struct chain_t *p_dir,
- struct uni_name_t *p_uniname, s32 num_entries,
- struct dos_name_t *p_dosname, u32 type);
-void exfat_delete_dir_entry(struct super_block *sb, struct chain_t *p_dir,
- s32 entry, s32 order, s32 num_entries);
-void exfat_get_uni_name_from_ext_entry(struct super_block *sb,
- struct chain_t *p_dir, s32 entry,
- u16 *uniname);
-s32 exfat_count_ext_entries(struct super_block *sb, struct chain_t *p_dir,
- s32 entry, struct dentry_t *p_entry);
-s32 exfat_calc_num_entries(struct uni_name_t *p_uniname);
-
-/* dir entry getter/setter */
-u32 exfat_get_entry_type(struct dentry_t *p_entry);
-u32 exfat_get_entry_attr(struct dentry_t *p_entry);
-void exfat_set_entry_attr(struct dentry_t *p_entry, u32 attr);
-u8 exfat_get_entry_flag(struct dentry_t *p_entry);
-void exfat_set_entry_flag(struct dentry_t *p_entry, u8 flags);
-u32 exfat_get_entry_clu0(struct dentry_t *p_entry);
-void exfat_set_entry_clu0(struct dentry_t *p_entry, u32 start_clu);
-u64 exfat_get_entry_size(struct dentry_t *p_entry);
-void exfat_set_entry_size(struct dentry_t *p_entry, u64 size);
-void exfat_get_entry_time(struct dentry_t *p_entry, struct timestamp_t *tp,
- u8 mode);
-void exfat_set_entry_time(struct dentry_t *p_entry, struct timestamp_t *tp,
- u8 mode);
-
-extern const u8 uni_upcase[];
-#endif /* _EXFAT_H */
diff -Nurp linux-5.6.3.orig/drivers/staging/exfat/exfat_nls.c linux-5.6.3/drivers/staging/exfat/exfat_nls.c
--- linux-5.6.3.orig/drivers/staging/exfat/exfat_nls.c 2020-03-30 01:25:41.000000000 +0300
+++ linux-5.6.3/drivers/staging/exfat/exfat_nls.c 1970-01-01 02:00:00.000000000 +0200
@@ -1,212 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * Copyright (C) 2012-2013 Samsung Electronics Co., Ltd.
- */
-
-#include <linux/string.h>
-#include <linux/nls.h>
-#include "exfat.h"
-
-static u16 bad_uni_chars[] = {
- /* " * / : < > ? \ | */
- 0x0022, 0x002A, 0x002F, 0x003A,
- 0x003C, 0x003E, 0x003F, 0x005C, 0x007C,
- 0
-};
-
-static int convert_ch_to_uni(struct nls_table *nls, u16 *uni, u8 *ch,
- bool *lossy)
-{
- int len;
-
- *uni = 0x0;
-
- if (ch[0] < 0x80) {
- *uni = (u16)ch[0];
- return 1;
- }
-
- len = nls->char2uni(ch, NLS_MAX_CHARSET_SIZE, uni);
- if (len < 0) {
- /* conversion failed */
- pr_info("%s: fail to use nls\n", __func__);
- if (lossy)
- *lossy = true;
- *uni = (u16)'_';
- if (!strcmp(nls->charset, "utf8"))
- return 1;
- else
- return 2;
- }
-
- return len;
-}
-
-static int convert_uni_to_ch(struct nls_table *nls, u8 *ch, u16 uni,
- bool *lossy)
-{
- int len;
-
- ch[0] = 0x0;
-
- if (uni < 0x0080) {
- ch[0] = (u8)uni;
- return 1;
- }
-
- len = nls->uni2char(uni, ch, NLS_MAX_CHARSET_SIZE);
- if (len < 0) {
- /* conversion failed */
- pr_info("%s: fail to use nls\n", __func__);
- if (lossy)
- *lossy = true;
- ch[0] = '_';
- return 1;
- }
-
- return len;
-}
-
-u16 nls_upper(struct super_block *sb, u16 a)
-{
- struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
-
- if (EXFAT_SB(sb)->options.casesensitive)
- return a;
- if (p_fs->vol_utbl && p_fs->vol_utbl[get_col_index(a)])
- return p_fs->vol_utbl[get_col_index(a)][get_row_index(a)];
- else
- return a;
-}
-
-static u16 *nls_wstrchr(u16 *str, u16 wchar)
-{
- while (*str) {
- if (*(str++) == wchar)
- return str;
- }
-
- return NULL;
-}
-
-int nls_uniname_cmp(struct super_block *sb, u16 *a, u16 *b)
-{
- int i;
-
- for (i = 0; i < MAX_NAME_LENGTH; i++, a++, b++) {
- if (nls_upper(sb, *a) != nls_upper(sb, *b))
- return 1;
- if (*a == 0x0)
- return 0;
- }
- return 0;
-}
-
-void nls_uniname_to_cstring(struct super_block *sb, u8 *p_cstring,
- struct uni_name_t *p_uniname)
-{
- int i, j, len;
- u8 buf[MAX_CHARSET_SIZE];
- u16 *uniname = p_uniname->name;
- struct nls_table *nls = EXFAT_SB(sb)->nls_io;
-
- if (!nls) {
- len = utf16s_to_utf8s(uniname, MAX_NAME_LENGTH,
- UTF16_HOST_ENDIAN, p_cstring,
- MAX_NAME_LENGTH);
- p_cstring[len] = 0;
- return;
- }
-
- i = 0;
- while (i < (MAX_NAME_LENGTH - 1)) {
- if (*uniname == (u16)'\0')
- break;
-
- len = convert_uni_to_ch(nls, buf, *uniname, NULL);
-
- if (len > 1) {
- for (j = 0; j < len; j++)
- *p_cstring++ = (char)*(buf + j);
- } else { /* len == 1 */
- *p_cstring++ = (char)*buf;
- }
-
- uniname++;
- i++;
- }
-
- *p_cstring = '\0';
-}
-
-void nls_cstring_to_uniname(struct super_block *sb,
- struct uni_name_t *p_uniname, u8 *p_cstring,
- bool *p_lossy)
-{
- int i, j;
- bool lossy = false;
- u8 *end_of_name;
- u8 upname[MAX_NAME_LENGTH * 2];
- u16 *uniname = p_uniname->name;
- struct nls_table *nls = EXFAT_SB(sb)->nls_io;
-
- /* strip all trailing spaces */
- end_of_name = p_cstring + strlen(p_cstring);
-
- while (*(--end_of_name) == ' ') {
- if (end_of_name < p_cstring)
- break;
- }
- *(++end_of_name) = '\0';
-
- if (strcmp(p_cstring, ".") && strcmp(p_cstring, "..")) {
- /* strip all trailing periods */
- while (*(--end_of_name) == '.') {
- if (end_of_name < p_cstring)
- break;
- }
- *(++end_of_name) = '\0';
- }
-
- if (*p_cstring == '\0')
- lossy = true;
-
- if (!nls) {
- i = utf8s_to_utf16s(p_cstring, MAX_NAME_LENGTH,
- UTF16_HOST_ENDIAN, uniname,
- MAX_NAME_LENGTH);
- for (j = 0; j < i; j++)
- SET16_A(upname + j * 2, nls_upper(sb, uniname[j]));
- uniname[i] = '\0';
- } else {
- i = 0;
- j = 0;
- while (j < (MAX_NAME_LENGTH - 1)) {
- if (*(p_cstring + i) == '\0')
- break;
-
- i += convert_ch_to_uni(nls, uniname,
- (u8 *)(p_cstring + i), &lossy);
-
- if ((*uniname < 0x0020) ||
- nls_wstrchr(bad_uni_chars, *uniname))
- lossy = true;
-
- SET16_A(upname + j * 2, nls_upper(sb, *uniname));
-
- uniname++;
- j++;
- }
-
- if (*(p_cstring + i) != '\0')
- lossy = true;
- *uniname = (u16)'\0';
- }
-
- p_uniname->name_len = j;
- p_uniname->name_hash = calc_checksum_2byte(upname, j << 1, 0,
- CS_DEFAULT);
-
- if (p_lossy)
- *p_lossy = lossy;
-}
diff -Nurp linux-5.6.3.orig/drivers/staging/exfat/exfat_super.c linux-5.6.3/drivers/staging/exfat/exfat_super.c
--- linux-5.6.3.orig/drivers/staging/exfat/exfat_super.c 2020-03-30 01:25:41.000000000 +0300
+++ linux-5.6.3/drivers/staging/exfat/exfat_super.c 1970-01-01 02:00:00.000000000 +0200
@@ -1,3883 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * Copyright (C) 2012-2013 Samsung Electronics Co., Ltd.
- */
-
-#include <linux/module.h>
-#include <linux/init.h>
-#include <linux/time.h>
-#include <linux/slab.h>
-#include <linux/mm.h>
-#include <linux/seq_file.h>
-#include <linux/pagemap.h>
-#include <linux/mpage.h>
-#include <linux/buffer_head.h>
-#include <linux/exportfs.h>
-#include <linux/mount.h>
-#include <linux/vfs.h>
-#include <linux/aio.h>
-#include <linux/iversion.h>
-#include <linux/parser.h>
-#include <linux/uio.h>
-#include <linux/writeback.h>
-#include <linux/log2.h>
-#include <linux/hash.h>
-#include <linux/backing-dev.h>
-#include <linux/sched.h>
-#include <linux/fs_struct.h>
-#include <linux/namei.h>
-#include <linux/random.h>
-#include <linux/string.h>
-#include <linux/nls.h>
-#include <linux/mutex.h>
-#include <linux/swap.h>
-
-#define EXFAT_VERSION "1.3.0"
-
-#include "exfat.h"
-
-static struct kmem_cache *exfat_inode_cachep;
-
-static int exfat_default_codepage = CONFIG_STAGING_EXFAT_DEFAULT_CODEPAGE;
-static char exfat_default_iocharset[] = CONFIG_STAGING_EXFAT_DEFAULT_IOCHARSET;
-
-#define INC_IVERSION(x) (inode_inc_iversion(x))
-#define GET_IVERSION(x) (inode_peek_iversion_raw(x))
-#define SET_IVERSION(x, y) (inode_set_iversion(x, y))
-
-static struct inode *exfat_iget(struct super_block *sb, loff_t i_pos);
-static int exfat_sync_inode(struct inode *inode);
-static struct inode *exfat_build_inode(struct super_block *sb,
- struct file_id_t *fid, loff_t i_pos);
-static int exfat_write_inode(struct inode *inode,
- struct writeback_control *wbc);
-static void exfat_write_super(struct super_block *sb);
-
-#define UNIX_SECS_1980 315532800L
-#define UNIX_SECS_2108 4354819200L
-
-/* Convert a FAT time/date pair to a UNIX date (seconds since 1 1 70). */
-static void exfat_time_fat2unix(struct timespec64 *ts, struct date_time_t *tp)
-{
- ts->tv_sec = mktime64(tp->Year + 1980, tp->Month + 1, tp->Day,
- tp->Hour, tp->Minute, tp->Second);
-
- ts->tv_nsec = tp->MilliSecond * NSEC_PER_MSEC;
-}
-
-/* Convert linear UNIX date to a FAT time/date pair. */
-static void exfat_time_unix2fat(struct timespec64 *ts, struct date_time_t *tp)
-{
- time64_t second = ts->tv_sec;
- struct tm tm;
-
- time64_to_tm(second, 0, &tm);
-
- if (second < UNIX_SECS_1980) {
- tp->MilliSecond = 0;
- tp->Second = 0;
- tp->Minute = 0;
- tp->Hour = 0;
- tp->Day = 1;
- tp->Month = 1;
- tp->Year = 0;
- return;
- }
-
- if (second >= UNIX_SECS_2108) {
- tp->MilliSecond = 999;
- tp->Second = 59;
- tp->Minute = 59;
- tp->Hour = 23;
- tp->Day = 31;
- tp->Month = 12;
- tp->Year = 127;
- return;
- }
-
- tp->MilliSecond = ts->tv_nsec / NSEC_PER_MSEC;
- tp->Second = tm.tm_sec;
- tp->Minute = tm.tm_min;
- tp->Hour = tm.tm_hour;
- tp->Day = tm.tm_mday;
- tp->Month = tm.tm_mon + 1;
- tp->Year = tm.tm_year + 1900 - 1980;
-}
-
-struct timestamp_t *tm_current(struct timestamp_t *tp)
-{
- time64_t second = ktime_get_real_seconds();
- struct tm tm;
-
- time64_to_tm(second, 0, &tm);
-
- if (second < UNIX_SECS_1980) {
- tp->sec = 0;
- tp->min = 0;
- tp->hour = 0;
- tp->day = 1;
- tp->mon = 1;
- tp->year = 0;
- return tp;
- }
-
- if (second >= UNIX_SECS_2108) {
- tp->sec = 59;
- tp->min = 59;
- tp->hour = 23;
- tp->day = 31;
- tp->mon = 12;
- tp->year = 127;
- return tp;
- }
-
- tp->sec = tm.tm_sec;
- tp->min = tm.tm_min;
- tp->hour = tm.tm_hour;
- tp->day = tm.tm_mday;
- tp->mon = tm.tm_mon + 1;
- tp->year = tm.tm_year + 1900 - 1980;
-
- return tp;
-}
-
-static void __lock_super(struct super_block *sb)
-{
- struct exfat_sb_info *sbi = EXFAT_SB(sb);
-
- mutex_lock(&sbi->s_lock);
-}
-
-static void __unlock_super(struct super_block *sb)
-{
- struct exfat_sb_info *sbi = EXFAT_SB(sb);
-
- mutex_unlock(&sbi->s_lock);
-}
-
-static int __is_sb_dirty(struct super_block *sb)
-{
- struct exfat_sb_info *sbi = EXFAT_SB(sb);
-
- return sbi->s_dirt;
-}
-
-static void __set_sb_clean(struct super_block *sb)
-{
- struct exfat_sb_info *sbi = EXFAT_SB(sb);
-
- sbi->s_dirt = 0;
-}
-
-static int __exfat_revalidate(struct dentry *dentry)
-{
- return 0;
-}
-
-static int exfat_revalidate(struct dentry *dentry, unsigned int flags)
-{
- if (flags & LOOKUP_RCU)
- return -ECHILD;
-
- if (dentry->d_inode)
- return 1;
- return __exfat_revalidate(dentry);
-}
-
-static int exfat_revalidate_ci(struct dentry *dentry, unsigned int flags)
-{
- if (flags & LOOKUP_RCU)
- return -ECHILD;
-
- if (dentry->d_inode)
- return 1;
-
- if (!flags)
- return 0;
-
- if (flags & (LOOKUP_CREATE | LOOKUP_RENAME_TARGET))
- return 0;
-
- return __exfat_revalidate(dentry);
-}
-
-static unsigned int __exfat_striptail_len(unsigned int len, const char *name)
-{
- while (len && name[len - 1] == '.')
- len--;
- return len;
-}
-
-static unsigned int exfat_striptail_len(const struct qstr *qstr)
-{
- return __exfat_striptail_len(qstr->len, qstr->name);
-}
-
-static int exfat_d_hash(const struct dentry *dentry, struct qstr *qstr)
-{
- qstr->hash = full_name_hash(dentry, qstr->name,
- exfat_striptail_len(qstr));
- return 0;
-}
-
-static int exfat_d_hashi(const struct dentry *dentry, struct qstr *qstr)
-{
- struct super_block *sb = dentry->d_sb;
- const unsigned char *name;
- unsigned int len;
- unsigned long hash;
-
- name = qstr->name;
- len = exfat_striptail_len(qstr);
-
- hash = init_name_hash(dentry);
- while (len--)
- hash = partial_name_hash(nls_upper(sb, *name++), hash);
- qstr->hash = end_name_hash(hash);
-
- return 0;
-}
-
-static int exfat_cmpi(const struct dentry *dentry, unsigned int len,
- const char *str, const struct qstr *name)
-{
- struct nls_table *t = EXFAT_SB(dentry->d_sb)->nls_io;
- unsigned int alen, blen;
-
- alen = exfat_striptail_len(name);
- blen = __exfat_striptail_len(len, str);
- if (alen == blen) {
- if (!t) {
- if (strncasecmp(name->name, str, alen) == 0)
- return 0;
- } else {
- if (nls_strnicmp(t, name->name, str, alen) == 0)
- return 0;
- }
- }
- return 1;
-}
-
-static int exfat_cmp(const struct dentry *dentry, unsigned int len,
- const char *str, const struct qstr *name)
-{
- unsigned int alen, blen;
-
- alen = exfat_striptail_len(name);
- blen = __exfat_striptail_len(len, str);
- if (alen == blen) {
- if (strncmp(name->name, str, alen) == 0)
- return 0;
- }
- return 1;
-}
-
-static const struct dentry_operations exfat_ci_dentry_ops = {
- .d_revalidate = exfat_revalidate_ci,
- .d_hash = exfat_d_hashi,
- .d_compare = exfat_cmpi,
-};
-
-static const struct dentry_operations exfat_dentry_ops = {
- .d_revalidate = exfat_revalidate,
- .d_hash = exfat_d_hash,
- .d_compare = exfat_cmp,
-};
-
-static DEFINE_MUTEX(z_mutex);
-
-static inline void fs_sync(struct super_block *sb, bool do_sync)
-{
- if (do_sync)
- exfat_bdev_sync(sb);
-}
-
-/*
- * If ->i_mode can't hold S_IWUGO (i.e. ATTR_RO), we use ->i_attrs to
- * save ATTR_RO instead of ->i_mode.
- *
- * If it's directory and !sbi->options.rodir, ATTR_RO isn't read-only
- * bit, it's just used as flag for app.
- */
-static inline int exfat_mode_can_hold_ro(struct inode *inode)
-{
- struct exfat_sb_info *sbi = EXFAT_SB(inode->i_sb);
-
- if (S_ISDIR(inode->i_mode))
- return 0;
-
- if ((~sbi->options.fs_fmask) & 0222)
- return 1;
- return 0;
-}
-
-/* Convert attribute bits and a mask to the UNIX mode. */
-static inline mode_t exfat_make_mode(struct exfat_sb_info *sbi, u32 attr,
- mode_t mode)
-{
- if ((attr & ATTR_READONLY) && !(attr & ATTR_SUBDIR))
- mode &= ~0222;
-
- if (attr & ATTR_SUBDIR)
- return (mode & ~sbi->options.fs_dmask) | S_IFDIR;
- else if (attr & ATTR_SYMLINK)
- return (mode & ~sbi->options.fs_dmask) | S_IFLNK;
- else
- return (mode & ~sbi->options.fs_fmask) | S_IFREG;
-}
-
-/* Return the FAT attribute byte for this inode */
-static inline u32 exfat_make_attr(struct inode *inode)
-{
- if (exfat_mode_can_hold_ro(inode) && !(inode->i_mode & 0222))
- return (EXFAT_I(inode)->fid.attr) | ATTR_READONLY;
- else
- return EXFAT_I(inode)->fid.attr;
-}
-
-static inline void exfat_save_attr(struct inode *inode, u32 attr)
-{
- if (exfat_mode_can_hold_ro(inode))
- EXFAT_I(inode)->fid.attr = attr & ATTR_RWMASK;
- else
- EXFAT_I(inode)->fid.attr = attr & (ATTR_RWMASK | ATTR_READONLY);
-}
-
-static int ffsMountVol(struct super_block *sb)
-{
- int i, ret;
- struct pbr_sector_t *p_pbr;
- struct buffer_head *tmp_bh = NULL;
- struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
- struct bd_info_t *p_bd = &(EXFAT_SB(sb)->bd_info);
-
- pr_info("[EXFAT] trying to mount...\n");
-
- mutex_lock(&z_mutex);
-
- exfat_buf_init(sb);
-
- mutex_init(&p_fs->v_mutex);
- p_fs->dev_ejected = 0;
-
- /* open the block device */
- exfat_bdev_open(sb);
-
- if (p_bd->sector_size < sb->s_blocksize) {
- printk(KERN_INFO "EXFAT: mount failed - sector size %d less than blocksize %ld\n",
- p_bd->sector_size, sb->s_blocksize);
- ret = -EINVAL;
- goto out;
- }
- if (p_bd->sector_size > sb->s_blocksize)
- sb_set_blocksize(sb, p_bd->sector_size);
-
- /* read Sector 0 */
- if (sector_read(sb, 0, &tmp_bh, 1) != 0) {
- ret = -EIO;
- goto out;
- }
-
- p_fs->PBR_sector = 0;
-
- p_pbr = (struct pbr_sector_t *)tmp_bh->b_data;
-
- /* check the validity of PBR */
- if (GET16_A(p_pbr->signature) != PBR_SIGNATURE) {
- brelse(tmp_bh);
- exfat_bdev_close(sb);
- ret = -EFSCORRUPTED;
- goto out;
- }
-
- /* fill fs_struct */
- for (i = 0; i < 53; i++)
- if (p_pbr->bpb[i])
- break;
-
- if (i < 53) {
- /* Not sure how we'd get here, but complain if it does */
- ret = -EINVAL;
- pr_info("EXFAT: Attempted to mount VFAT filesystem\n");
- goto out;
- } else {
- ret = exfat_mount(sb, p_pbr);
- }
-
- brelse(tmp_bh);
-
- if (ret) {
- exfat_bdev_close(sb);
- goto out;
- }
-
- ret = load_alloc_bitmap(sb);
- if (ret) {
- exfat_bdev_close(sb);
- goto out;
- }
- ret = load_upcase_table(sb);
- if (ret) {
- free_alloc_bitmap(sb);
- exfat_bdev_close(sb);
- goto out;
- }
-
- if (p_fs->dev_ejected) {
- free_upcase_table(sb);
- free_alloc_bitmap(sb);
- exfat_bdev_close(sb);
- ret = -EIO;
- goto out;
- }
-
- pr_info("[EXFAT] mounted successfully\n");
-
-out:
- mutex_unlock(&z_mutex);
-
- return ret;
-}
-
-static int ffsUmountVol(struct super_block *sb)
-{
- struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
- int err = 0;
-
- pr_info("[EXFAT] trying to unmount...\n");
-
- mutex_lock(&z_mutex);
-
- /* acquire the lock for file system critical section */
- mutex_lock(&p_fs->v_mutex);
-
- fs_sync(sb, true);
- fs_set_vol_flags(sb, VOL_CLEAN);
-
- free_upcase_table(sb);
- free_alloc_bitmap(sb);
-
- exfat_fat_release_all(sb);
- exfat_buf_release_all(sb);
-
- /* close the block device */
- exfat_bdev_close(sb);
-
- if (p_fs->dev_ejected) {
- pr_info("[EXFAT] unmounted with media errors. Device is already ejected.\n");
- err = -EIO;
- }
-
- exfat_buf_shutdown(sb);
-
- /* release the lock for file system critical section */
- mutex_unlock(&p_fs->v_mutex);
- mutex_unlock(&z_mutex);
-
- pr_info("[EXFAT] unmounted successfully\n");
-
- return err;
-}
-
-static int ffsGetVolInfo(struct super_block *sb, struct vol_info_t *info)
-{
- int err = 0;
- struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
-
- /* check the validity of pointer parameters */
- if (!info)
- return -EINVAL;
-
- /* acquire the lock for file system critical section */
- mutex_lock(&p_fs->v_mutex);
-
- if (p_fs->used_clusters == UINT_MAX)
- p_fs->used_clusters = exfat_count_used_clusters(sb);
-
- info->FatType = p_fs->vol_type;
- info->ClusterSize = p_fs->cluster_size;
- info->NumClusters = p_fs->num_clusters - 2; /* clu 0 & 1 */
- info->UsedClusters = p_fs->used_clusters;
- info->FreeClusters = info->NumClusters - info->UsedClusters;
-
- if (p_fs->dev_ejected)
- err = -EIO;
-
- /* release the lock for file system critical section */
- mutex_unlock(&p_fs->v_mutex);
-
- return err;
-}
-
-static int ffsSyncVol(struct super_block *sb, bool do_sync)
-{
- int err = 0;
- struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
-
- /* acquire the lock for file system critical section */
- mutex_lock(&p_fs->v_mutex);
-
- /* synchronize the file system */
- fs_sync(sb, do_sync);
- fs_set_vol_flags(sb, VOL_CLEAN);
-
- if (p_fs->dev_ejected)
- err = -EIO;
-
- /* release the lock for file system critical section */
- mutex_unlock(&p_fs->v_mutex);
-
- return err;
-}
-
-/*----------------------------------------------------------------------*/
-/* File Operation Functions */
-/*----------------------------------------------------------------------*/
-
-static int ffsLookupFile(struct inode *inode, char *path, struct file_id_t *fid)
-{
- int ret, dentry, num_entries;
- struct chain_t dir;
- struct uni_name_t uni_name;
- struct dos_name_t dos_name;
- struct dentry_t *ep, *ep2;
- struct entry_set_cache_t *es = NULL;
- struct super_block *sb = inode->i_sb;
- struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
-
- pr_debug("%s entered\n", __func__);
-
- /* check the validity of pointer parameters */
- if (!fid || !path || (*path == '\0'))
- return -EINVAL;
-
- /* acquire the lock for file system critical section */
- mutex_lock(&p_fs->v_mutex);
-
- /* check the validity of directory name in the given pathname */
- ret = resolve_path(inode, path, &dir, &uni_name);
- if (ret)
- goto out;
-
- ret = get_num_entries_and_dos_name(sb, &dir, &uni_name, &num_entries,
- &dos_name);
- if (ret)
- goto out;
-
- /* search the file name for directories */
- dentry = exfat_find_dir_entry(sb, &dir, &uni_name, num_entries,
- &dos_name, TYPE_ALL);
- if (dentry < -1) {
- ret = -ENOENT;
- goto out;
- }
-
- fid->dir.dir = dir.dir;
- fid->dir.size = dir.size;
- fid->dir.flags = dir.flags;
- fid->entry = dentry;
-
- if (dentry == -1) {
- fid->type = TYPE_DIR;
- fid->rwoffset = 0;
- fid->hint_last_off = -1;
-
- fid->attr = ATTR_SUBDIR;
- fid->flags = 0x01;
- fid->size = 0;
- fid->start_clu = p_fs->root_dir;
- } else {
- es = get_entry_set_in_dir(sb, &dir, dentry,
- ES_2_ENTRIES, &ep);
- if (!es) {
- ret = -ENOENT;
- goto out;
- }
- ep2 = ep + 1;
-
- fid->type = exfat_get_entry_type(ep);
- fid->rwoffset = 0;
- fid->hint_last_off = -1;
- fid->attr = exfat_get_entry_attr(ep);
-
- fid->size = exfat_get_entry_size(ep2);
- if ((fid->type == TYPE_FILE) && (fid->size == 0)) {
- fid->flags = (p_fs->vol_type == EXFAT) ? 0x03 : 0x01;
- fid->start_clu = CLUSTER_32(~0);
- } else {
- fid->flags = exfat_get_entry_flag(ep2);
- fid->start_clu = exfat_get_entry_clu0(ep2);
- }
-
- release_entry_set(es);
- }
-
- if (p_fs->dev_ejected)
- ret = -EIO;
-out:
- /* release the lock for file system critical section */
- mutex_unlock(&p_fs->v_mutex);
-
- return ret;
-}
-
-static int ffsCreateFile(struct inode *inode, char *path, u8 mode,
- struct file_id_t *fid)
-{
- struct chain_t dir;
- struct uni_name_t uni_name;
- struct super_block *sb = inode->i_sb;
- struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
- int ret = 0;
-
- /* check the validity of pointer parameters */
- if (!fid || !path || (*path == '\0'))
- return -EINVAL;
-
- /* acquire the lock for file system critical section */
- mutex_lock(&p_fs->v_mutex);
-
- /* check the validity of directory name in the given pathname */
- ret = resolve_path(inode, path, &dir, &uni_name);
- if (ret)
- goto out;
-
- fs_set_vol_flags(sb, VOL_DIRTY);
-
- /* create a new file */
- ret = create_file(inode, &dir, &uni_name, mode, fid);
-
-#ifndef CONFIG_STAGING_EXFAT_DELAYED_SYNC
- fs_sync(sb, true);
- fs_set_vol_flags(sb, VOL_CLEAN);
-#endif
-
- if (p_fs->dev_ejected)
- ret = -EIO;
-
-out:
- /* release the lock for file system critical section */
- mutex_unlock(&p_fs->v_mutex);
-
- return ret;
-}
-
-static int ffsReadFile(struct inode *inode, struct file_id_t *fid, void *buffer,
- u64 count, u64 *rcount)
-{
- s32 offset, sec_offset, clu_offset;
- u32 clu;
- int ret = 0;
- sector_t LogSector;
- u64 oneblkread, read_bytes;
- struct buffer_head *tmp_bh = NULL;
- struct super_block *sb = inode->i_sb;
- struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
- struct bd_info_t *p_bd = &(EXFAT_SB(sb)->bd_info);
-
- /* check the validity of the given file id */
- if (!fid)
- return -EINVAL;
-
- /* check the validity of pointer parameters */
- if (!buffer)
- return -EINVAL;
-
- /* acquire the lock for file system critical section */
- mutex_lock(&p_fs->v_mutex);
-
- /* check if the given file ID is opened */
- if (fid->type != TYPE_FILE) {
- ret = -EPERM;
- goto out;
- }
-
- if (fid->rwoffset > fid->size)
- fid->rwoffset = fid->size;
-
- if (count > (fid->size - fid->rwoffset))
- count = fid->size - fid->rwoffset;
-
- if (count == 0) {
- if (rcount)
- *rcount = 0;
- ret = 0;
- goto out;
- }
-
- read_bytes = 0;
-
- while (count > 0) {
- clu_offset = (s32)(fid->rwoffset >> p_fs->cluster_size_bits);
- clu = fid->start_clu;
-
- if (fid->flags == 0x03) {
- clu += clu_offset;
- } else {
- /* hint information */
- if ((clu_offset > 0) && (fid->hint_last_off > 0) &&
- (clu_offset >= fid->hint_last_off)) {
- clu_offset -= fid->hint_last_off;
- clu = fid->hint_last_clu;
- }
-
- while (clu_offset > 0) {
- /* clu = exfat_fat_read(sb, clu); */
- if (exfat_fat_read(sb, clu, &clu) == -1) {
- ret = -EIO;
- goto out;
- }
-
- clu_offset--;
- }
- }
-
- /* hint information */
- fid->hint_last_off = (s32)(fid->rwoffset >>
- p_fs->cluster_size_bits);
- fid->hint_last_clu = clu;
-
- /* byte offset in cluster */
- offset = (s32)(fid->rwoffset & (p_fs->cluster_size - 1));
-
- /* sector offset in cluster */
- sec_offset = offset >> p_bd->sector_size_bits;
-
- /* byte offset in sector */
- offset &= p_bd->sector_size_mask;
-
- LogSector = START_SECTOR(clu) + sec_offset;
-
- oneblkread = (u64)(p_bd->sector_size - offset);
- if (oneblkread > count)
- oneblkread = count;
-
- if ((offset == 0) && (oneblkread == p_bd->sector_size)) {
- if (sector_read(sb, LogSector, &tmp_bh, 1) !=
- 0)
- goto err_out;
- memcpy((char *)buffer + read_bytes,
- (char *)tmp_bh->b_data, (s32)oneblkread);
- } else {
- if (sector_read(sb, LogSector, &tmp_bh, 1) !=
- 0)
- goto err_out;
- memcpy((char *)buffer + read_bytes,
- (char *)tmp_bh->b_data + offset,
- (s32)oneblkread);
- }
- count -= oneblkread;
- read_bytes += oneblkread;
- fid->rwoffset += oneblkread;
- }
- brelse(tmp_bh);
-
-/* How did this ever work and not leak a brlse()?? */
-err_out:
- /* set the size of read bytes */
- if (rcount)
- *rcount = read_bytes;
-
- if (p_fs->dev_ejected)
- ret = -EIO;
-
-out:
- /* release the lock for file system critical section */
- mutex_unlock(&p_fs->v_mutex);
-
- return ret;
-}
-
-static int ffsWriteFile(struct inode *inode, struct file_id_t *fid,
- void *buffer, u64 count, u64 *wcount)
-{
- bool modified = false;
- s32 offset, sec_offset, clu_offset;
- s32 num_clusters, num_alloc, num_alloced = (s32)~0;
- int ret = 0;
- u32 clu, last_clu;
- sector_t LogSector;
- u64 oneblkwrite, write_bytes;
- struct chain_t new_clu;
- struct timestamp_t tm;
- struct dentry_t *ep, *ep2;
- struct entry_set_cache_t *es = NULL;
- struct buffer_head *tmp_bh = NULL;
- struct super_block *sb = inode->i_sb;
- struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
- struct bd_info_t *p_bd = &(EXFAT_SB(sb)->bd_info);
-
- /* check the validity of the given file id */
- if (!fid)
- return -EINVAL;
-
- /* check the validity of pointer parameters */
- if (!buffer)
- return -EINVAL;
-
- /* acquire the lock for file system critical section */
- mutex_lock(&p_fs->v_mutex);
-
- /* check if the given file ID is opened */
- if (fid->type != TYPE_FILE) {
- ret = -EPERM;
- goto out;
- }
-
- if (fid->rwoffset > fid->size)
- fid->rwoffset = fid->size;
-
- if (count == 0) {
- if (wcount)
- *wcount = 0;
- ret = 0;
- goto out;
- }
-
- fs_set_vol_flags(sb, VOL_DIRTY);
-
- if (fid->size == 0)
- num_clusters = 0;
- else
- num_clusters = (s32)((fid->size - 1) >>
- p_fs->cluster_size_bits) + 1;
-
- write_bytes = 0;
-
- while (count > 0) {
- clu_offset = (s32)(fid->rwoffset >> p_fs->cluster_size_bits);
- clu = fid->start_clu;
- last_clu = fid->start_clu;
-
- if (fid->flags == 0x03) {
- if ((clu_offset > 0) && (clu != CLUSTER_32(~0))) {
- last_clu += clu_offset - 1;
-
- if (clu_offset == num_clusters)
- clu = CLUSTER_32(~0);
- else
- clu += clu_offset;
- }
- } else {
- /* hint information */
- if ((clu_offset > 0) && (fid->hint_last_off > 0) &&
- (clu_offset >= fid->hint_last_off)) {
- clu_offset -= fid->hint_last_off;
- clu = fid->hint_last_clu;
- }
-
- while ((clu_offset > 0) && (clu != CLUSTER_32(~0))) {
- last_clu = clu;
- /* clu = exfat_fat_read(sb, clu); */
- if (exfat_fat_read(sb, clu, &clu) == -1) {
- ret = -EIO;
- goto out;
- }
- clu_offset--;
- }
- }
-
- if (clu == CLUSTER_32(~0)) {
- num_alloc = (s32)((count - 1) >>
- p_fs->cluster_size_bits) + 1;
- new_clu.dir = (last_clu == CLUSTER_32(~0)) ?
- CLUSTER_32(~0) : last_clu + 1;
- new_clu.size = 0;
- new_clu.flags = fid->flags;
-
- /* (1) allocate a chain of clusters */
- num_alloced = exfat_alloc_cluster(sb,
- num_alloc,
- &new_clu);
- if (num_alloced == 0)
- break;
- if (num_alloced < 0) {
- ret = num_alloced;
- goto out;
- }
-
- /* (2) append to the FAT chain */
- if (last_clu == CLUSTER_32(~0)) {
- if (new_clu.flags == 0x01)
- fid->flags = 0x01;
- fid->start_clu = new_clu.dir;
- modified = true;
- } else {
- if (new_clu.flags != fid->flags) {
- exfat_chain_cont_cluster(sb,
- fid->start_clu,
- num_clusters);
- fid->flags = 0x01;
- modified = true;
- }
- if (new_clu.flags == 0x01)
- exfat_fat_write(sb, last_clu, new_clu.dir);
- }
-
- num_clusters += num_alloced;
- clu = new_clu.dir;
- }
-
- /* hint information */
- fid->hint_last_off = (s32)(fid->rwoffset >>
- p_fs->cluster_size_bits);
- fid->hint_last_clu = clu;
-
- /* byte offset in cluster */
- offset = (s32)(fid->rwoffset & (p_fs->cluster_size - 1));
-
- /* sector offset in cluster */
- sec_offset = offset >> p_bd->sector_size_bits;
-
- /* byte offset in sector */
- offset &= p_bd->sector_size_mask;
-
- LogSector = START_SECTOR(clu) + sec_offset;
-
- oneblkwrite = (u64)(p_bd->sector_size - offset);
- if (oneblkwrite > count)
- oneblkwrite = count;
-
- if ((offset == 0) && (oneblkwrite == p_bd->sector_size)) {
- if (sector_read(sb, LogSector, &tmp_bh, 0) !=
- 0)
- goto err_out;
- memcpy((char *)tmp_bh->b_data,
- (char *)buffer + write_bytes, (s32)oneblkwrite);
- if (sector_write(sb, LogSector, tmp_bh, 0) !=
- 0) {
- brelse(tmp_bh);
- goto err_out;
- }
- } else {
- if ((offset > 0) ||
- ((fid->rwoffset + oneblkwrite) < fid->size)) {
- if (sector_read(sb, LogSector, &tmp_bh, 1) !=
- 0)
- goto err_out;
- } else {
- if (sector_read(sb, LogSector, &tmp_bh, 0) !=
- 0)
- goto err_out;
- }
-
- memcpy((char *)tmp_bh->b_data + offset,
- (char *)buffer + write_bytes, (s32)oneblkwrite);
- if (sector_write(sb, LogSector, tmp_bh, 0) !=
- 0) {
- brelse(tmp_bh);
- goto err_out;
- }
- }
-
- count -= oneblkwrite;
- write_bytes += oneblkwrite;
- fid->rwoffset += oneblkwrite;
-
- fid->attr |= ATTR_ARCHIVE;
-
- if (fid->size < fid->rwoffset) {
- fid->size = fid->rwoffset;
- modified = true;
- }
- }
-
- brelse(tmp_bh);
-
- /* (3) update the direcoty entry */
- es = get_entry_set_in_dir(sb, &fid->dir, fid->entry,
- ES_ALL_ENTRIES, &ep);
- if (!es)
- goto err_out;
- ep2 = ep + 1;
-
- exfat_set_entry_time(ep, tm_current(&tm), TM_MODIFY);
- exfat_set_entry_attr(ep, fid->attr);
-
- if (modified) {
- if (exfat_get_entry_flag(ep2) != fid->flags)
- exfat_set_entry_flag(ep2, fid->flags);
-
- if (exfat_get_entry_size(ep2) != fid->size)
- exfat_set_entry_size(ep2, fid->size);
-
- if (exfat_get_entry_clu0(ep2) != fid->start_clu)
- exfat_set_entry_clu0(ep2, fid->start_clu);
- }
-
- update_dir_checksum_with_entry_set(sb, es);
- release_entry_set(es);
-
-#ifndef CONFIG_STAGING_EXFAT_DELAYED_SYNC
- fs_sync(sb, true);
- fs_set_vol_flags(sb, VOL_CLEAN);
-#endif
-
-err_out:
- /* set the size of written bytes */
- if (wcount)
- *wcount = write_bytes;
-
- if (num_alloced == 0)
- ret = -ENOSPC;
-
- else if (p_fs->dev_ejected)
- ret = -EIO;
-
-out:
- /* release the lock for file system critical section */
- mutex_unlock(&p_fs->v_mutex);
-
- return ret;
-}
-
-static int ffsTruncateFile(struct inode *inode, u64 old_size, u64 new_size)
-{
- s32 num_clusters;
- u32 last_clu = CLUSTER_32(0);
- int ret = 0;
- struct chain_t clu;
- struct timestamp_t tm;
- struct dentry_t *ep, *ep2;
- struct super_block *sb = inode->i_sb;
- struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
- struct file_id_t *fid = &(EXFAT_I(inode)->fid);
- struct entry_set_cache_t *es = NULL;
-
- pr_debug("%s entered (inode %p size %llu)\n", __func__, inode,
- new_size);
-
- /* acquire the lock for file system critical section */
- mutex_lock(&p_fs->v_mutex);
-
- /* check if the given file ID is opened */
- if (fid->type != TYPE_FILE) {
- ret = -EPERM;
- goto out;
- }
-
- if (fid->size != old_size) {
- pr_err("[EXFAT] truncate : can't skip it because of size-mismatch(old:%lld->fid:%lld).\n",
- old_size, fid->size);
- }
-
- if (old_size <= new_size) {
- ret = 0;
- goto out;
- }
-
- fs_set_vol_flags(sb, VOL_DIRTY);
-
- clu.dir = fid->start_clu;
- clu.size = (s32)((old_size - 1) >> p_fs->cluster_size_bits) + 1;
- clu.flags = fid->flags;
-
- if (new_size > 0) {
- num_clusters = (s32)((new_size - 1) >>
- p_fs->cluster_size_bits) + 1;
-
- if (clu.flags == 0x03) {
- clu.dir += num_clusters;
- } else {
- while (num_clusters > 0) {
- last_clu = clu.dir;
- if (exfat_fat_read(sb, clu.dir, &clu.dir) == -1) {
- ret = -EIO;
- goto out;
- }
- num_clusters--;
- }
- }
-
- clu.size -= num_clusters;
- }
-
- fid->size = new_size;
- fid->attr |= ATTR_ARCHIVE;
- if (new_size == 0) {
- fid->flags = (p_fs->vol_type == EXFAT) ? 0x03 : 0x01;
- fid->start_clu = CLUSTER_32(~0);
- }
-
- /* (1) update the directory entry */
- es = get_entry_set_in_dir(sb, &fid->dir, fid->entry,
- ES_ALL_ENTRIES, &ep);
- if (!es) {
- ret = -ENOENT;
- goto out;
- }
- ep2 = ep + 1;
-
- exfat_set_entry_time(ep, tm_current(&tm), TM_MODIFY);
- exfat_set_entry_attr(ep, fid->attr);
-
- exfat_set_entry_size(ep2, new_size);
- if (new_size == 0) {
- exfat_set_entry_flag(ep2, 0x01);
- exfat_set_entry_clu0(ep2, CLUSTER_32(0));
- }
-
- update_dir_checksum_with_entry_set(sb, es);
- release_entry_set(es);
-
- /* (2) cut off from the FAT chain */
- if (last_clu != CLUSTER_32(0)) {
- if (fid->flags == 0x01)
- exfat_fat_write(sb, last_clu, CLUSTER_32(~0));
- }
-
- /* (3) free the clusters */
- exfat_free_cluster(sb, &clu, 0);
-
- /* hint information */
- fid->hint_last_off = -1;
- if (fid->rwoffset > fid->size)
- fid->rwoffset = fid->size;
-
-#ifndef CONFIG_STAGING_EXFAT_DELAYED_SYNC
- fs_sync(sb, true);
- fs_set_vol_flags(sb, VOL_CLEAN);
-#endif
-
- if (p_fs->dev_ejected)
- ret = -EIO;
-
-out:
- pr_debug("%s exited (%d)\n", __func__, ret);
- /* release the lock for file system critical section */
- mutex_unlock(&p_fs->v_mutex);
-
- return ret;
-}
-
-static void update_parent_info(struct file_id_t *fid,
- struct inode *parent_inode)
-{
- struct fs_info_t *p_fs = &(EXFAT_SB(parent_inode->i_sb)->fs_info);
- struct file_id_t *parent_fid = &(EXFAT_I(parent_inode)->fid);
-
- if (unlikely((parent_fid->flags != fid->dir.flags) ||
- (parent_fid->size !=
- (fid->dir.size << p_fs->cluster_size_bits)) ||
- (parent_fid->start_clu != fid->dir.dir))) {
- fid->dir.dir = parent_fid->start_clu;
- fid->dir.flags = parent_fid->flags;
- fid->dir.size = ((parent_fid->size + (p_fs->cluster_size - 1))
- >> p_fs->cluster_size_bits);
- }
-}
-
-static int ffsMoveFile(struct inode *old_parent_inode, struct file_id_t *fid,
- struct inode *new_parent_inode, struct dentry *new_dentry)
-{
- s32 ret;
- s32 dentry;
- struct chain_t olddir, newdir;
- struct chain_t *p_dir = NULL;
- struct uni_name_t uni_name;
- struct dentry_t *ep;
- struct super_block *sb = old_parent_inode->i_sb;
- struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
- u8 *new_path = (u8 *)new_dentry->d_name.name;
- struct inode *new_inode = new_dentry->d_inode;
- int num_entries;
- struct file_id_t *new_fid = NULL;
- s32 new_entry = 0;
-
- /* check the validity of the given file id */
- if (!fid)
- return -EINVAL;
-
- /* check the validity of pointer parameters */
- if (!new_path || (*new_path == '\0'))
- return -EINVAL;
-
- /* acquire the lock for file system critical section */
- mutex_lock(&p_fs->v_mutex);
-
- update_parent_info(fid, old_parent_inode);
-
- olddir.dir = fid->dir.dir;
- olddir.size = fid->dir.size;
- olddir.flags = fid->dir.flags;
-
- dentry = fid->entry;
-
- /* check if the old file is "." or ".." */
- if (p_fs->vol_type != EXFAT) {
- if ((olddir.dir != p_fs->root_dir) && (dentry < 2)) {
- ret = -EPERM;
- goto out2;
- }
- }
-
- ep = get_entry_in_dir(sb, &olddir, dentry, NULL);
- if (!ep) {
- ret = -ENOENT;
- goto out2;
- }
-
- if (exfat_get_entry_attr(ep) & ATTR_READONLY) {
- ret = -EPERM;
- goto out2;
- }
-
- /* check whether new dir is existing directory and empty */
- if (new_inode) {
- u32 entry_type;
-
- ret = -ENOENT;
- new_fid = &EXFAT_I(new_inode)->fid;
-
- update_parent_info(new_fid, new_parent_inode);
-
- p_dir = &new_fid->dir;
- new_entry = new_fid->entry;
- ep = get_entry_in_dir(sb, p_dir, new_entry, NULL);
- if (!ep)
- goto out;
-
- entry_type = exfat_get_entry_type(ep);
-
- if (entry_type == TYPE_DIR) {
- struct chain_t new_clu;
-
- new_clu.dir = new_fid->start_clu;
- new_clu.size = (s32)((new_fid->size - 1) >>
- p_fs->cluster_size_bits) + 1;
- new_clu.flags = new_fid->flags;
-
- if (!is_dir_empty(sb, &new_clu)) {
- ret = -EEXIST;
- goto out;
- }
- }
- }
-
- /* check the validity of directory name in the given new pathname */
- ret = resolve_path(new_parent_inode, new_path, &newdir, &uni_name);
- if (ret)
- goto out2;
-
- fs_set_vol_flags(sb, VOL_DIRTY);
-
- if (olddir.dir == newdir.dir)
- ret = exfat_rename_file(new_parent_inode, &olddir, dentry,
- &uni_name, fid);
- else
- ret = move_file(new_parent_inode, &olddir, dentry, &newdir,
- &uni_name, fid);
-
- if ((ret == 0) && new_inode) {
- /* delete entries of new_dir */
- ep = get_entry_in_dir(sb, p_dir, new_entry, NULL);
- if (!ep)
- goto out;
-
- num_entries = exfat_count_ext_entries(sb, p_dir,
- new_entry, ep);
- if (num_entries < 0)
- goto out;
- exfat_delete_dir_entry(sb, p_dir, new_entry, 0,
- num_entries + 1);
- }
-out:
-#ifndef CONFIG_STAGING_EXFAT_DELAYED_SYNC
- fs_sync(sb, true);
- fs_set_vol_flags(sb, VOL_CLEAN);
-#endif
-
- if (p_fs->dev_ejected)
- ret = -EIO;
-out2:
- /* release the lock for file system critical section */
- mutex_unlock(&p_fs->v_mutex);
-
- return ret;
-}
-
-static int ffsRemoveFile(struct inode *inode, struct file_id_t *fid)
-{
- s32 dentry;
- int ret = 0;
- struct chain_t dir, clu_to_free;
- struct dentry_t *ep;
- struct super_block *sb = inode->i_sb;
- struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
-
- /* check the validity of the given file id */
- if (!fid)
- return -EINVAL;
-
- /* acquire the lock for file system critical section */
- mutex_lock(&p_fs->v_mutex);
-
- dir.dir = fid->dir.dir;
- dir.size = fid->dir.size;
- dir.flags = fid->dir.flags;
-
- dentry = fid->entry;
-
- ep = get_entry_in_dir(sb, &dir, dentry, NULL);
- if (!ep) {
- ret = -ENOENT;
- goto out;
- }
-
- if (exfat_get_entry_attr(ep) & ATTR_READONLY) {
- ret = -EPERM;
- goto out;
- }
- fs_set_vol_flags(sb, VOL_DIRTY);
-
- /* (1) update the directory entry */
- remove_file(inode, &dir, dentry);
-
- clu_to_free.dir = fid->start_clu;
- clu_to_free.size = (s32)((fid->size - 1) >> p_fs->cluster_size_bits) + 1;
- clu_to_free.flags = fid->flags;
-
- /* (2) free the clusters */
- exfat_free_cluster(sb, &clu_to_free, 0);
-
- fid->size = 0;
- fid->start_clu = CLUSTER_32(~0);
- fid->flags = (p_fs->vol_type == EXFAT) ? 0x03 : 0x01;
-
-#ifndef CONFIG_STAGING_EXFAT_DELAYED_SYNC
- fs_sync(sb, true);
- fs_set_vol_flags(sb, VOL_CLEAN);
-#endif
-
- if (p_fs->dev_ejected)
- ret = -EIO;
-out:
- /* release the lock for file system critical section */
- mutex_unlock(&p_fs->v_mutex);
-
- return ret;
-}
-
-#if 0
-/* Not currently wired up */
-static int ffsSetAttr(struct inode *inode, u32 attr)
-{
- u32 type;
- int ret = 0;
- sector_t sector = 0;
- struct dentry_t *ep;
- struct super_block *sb = inode->i_sb;
- struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
- struct file_id_t *fid = &(EXFAT_I(inode)->fid);
- u8 is_dir = (fid->type == TYPE_DIR) ? 1 : 0;
- struct entry_set_cache_t *es = NULL;
-
- if (fid->attr == attr) {
- if (p_fs->dev_ejected)
- return -EIO;
- return 0;
- }
-
- if (is_dir) {
- if ((fid->dir.dir == p_fs->root_dir) &&
- (fid->entry == -1)) {
- if (p_fs->dev_ejected)
- return -EIO;
- return 0;
- }
- }
-
- /* acquire the lock for file system critical section */
- mutex_lock(&p_fs->v_mutex);
-
- /* get the directory entry of given file */
- es = get_entry_set_in_dir(sb, &fid->dir, fid->entry,
- ES_ALL_ENTRIES, &ep);
- if (!es) {
- ret = -ENOENT;
- goto out;
- }
-
- type = exfat_get_entry_type(ep);
-
- if (((type == TYPE_FILE) && (attr & ATTR_SUBDIR)) ||
- ((type == TYPE_DIR) && (!(attr & ATTR_SUBDIR)))) {
- if (p_fs->dev_ejected)
- ret = -EIO;
- else
- ret = -EINVAL;
-
- release_entry_set(es);
- goto out;
- }
-
- fs_set_vol_flags(sb, VOL_DIRTY);
-
- /* set the file attribute */
- fid->attr = attr;
- exfat_set_entry_attr(ep, attr);
-
- update_dir_checksum_with_entry_set(sb, es);
- release_entry_set(es);
-
-#ifndef CONFIG_STAGING_EXFAT_DELAYED_SYNC
- fs_sync(sb, true);
- fs_set_vol_flags(sb, VOL_CLEAN);
-#endif
-
- if (p_fs->dev_ejected)
- ret = -EIO;
-out:
- /* release the lock for file system critical section */
- mutex_unlock(&p_fs->v_mutex);
-
- return ret;
-}
-#endif
-
-static int ffsReadStat(struct inode *inode, struct dir_entry_t *info)
-{
- s32 count;
- int ret = 0;
- struct chain_t dir;
- struct uni_name_t uni_name;
- struct timestamp_t tm;
- struct dentry_t *ep, *ep2;
- struct super_block *sb = inode->i_sb;
- struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
- struct file_id_t *fid = &(EXFAT_I(inode)->fid);
- struct entry_set_cache_t *es = NULL;
- u8 is_dir = (fid->type == TYPE_DIR) ? 1 : 0;
-
- pr_debug("%s entered\n", __func__);
-
- /* acquire the lock for file system critical section */
- mutex_lock(&p_fs->v_mutex);
-
- if (is_dir) {
- if ((fid->dir.dir == p_fs->root_dir) &&
- (fid->entry == -1)) {
- info->Attr = ATTR_SUBDIR;
- memset((char *)&info->CreateTimestamp, 0,
- sizeof(struct date_time_t));
- memset((char *)&info->ModifyTimestamp, 0,
- sizeof(struct date_time_t));
- memset((char *)&info->AccessTimestamp, 0,
- sizeof(struct date_time_t));
- strcpy(info->ShortName, ".");
- strcpy(info->Name, ".");
-
- dir.dir = p_fs->root_dir;
- dir.flags = 0x01;
-
- if (p_fs->root_dir == CLUSTER_32(0)) {
- /* FAT16 root_dir */
- info->Size = p_fs->dentries_in_root <<
- DENTRY_SIZE_BITS;
- } else {
- info->Size = count_num_clusters(sb, &dir) <<
- p_fs->cluster_size_bits;
- }
-
- count = count_dos_name_entries(sb, &dir, TYPE_DIR);
- if (count < 0) {
- ret = count; /* propagate error upward */
- goto out;
- }
- info->NumSubdirs = count;
-
- if (p_fs->dev_ejected)
- ret = -EIO;
- goto out;
- }
- }
-
- /* get the directory entry of given file or directory */
- es = get_entry_set_in_dir(sb, &fid->dir, fid->entry,
- ES_2_ENTRIES, &ep);
- if (!es) {
- ret = -ENOENT;
- goto out;
- }
- ep2 = ep + 1;
-
- /* set FILE_INFO structure using the acquired struct dentry_t */
- info->Attr = exfat_get_entry_attr(ep);
-
- exfat_get_entry_time(ep, &tm, TM_CREATE);
- info->CreateTimestamp.Year = tm.year;
- info->CreateTimestamp.Month = tm.mon;
- info->CreateTimestamp.Day = tm.day;
- info->CreateTimestamp.Hour = tm.hour;
- info->CreateTimestamp.Minute = tm.min;
- info->CreateTimestamp.Second = tm.sec;
- info->CreateTimestamp.MilliSecond = 0;
-
- exfat_get_entry_time(ep, &tm, TM_MODIFY);
- info->ModifyTimestamp.Year = tm.year;
- info->ModifyTimestamp.Month = tm.mon;
- info->ModifyTimestamp.Day = tm.day;
- info->ModifyTimestamp.Hour = tm.hour;
- info->ModifyTimestamp.Minute = tm.min;
- info->ModifyTimestamp.Second = tm.sec;
- info->ModifyTimestamp.MilliSecond = 0;
-
- memset((char *)&info->AccessTimestamp, 0, sizeof(struct date_time_t));
-
- *uni_name.name = 0x0;
- /* XXX this is very bad for exfat cuz name is already included in es.
- * API should be revised
- */
- exfat_get_uni_name_from_ext_entry(sb, &fid->dir, fid->entry,
- uni_name.name);
- nls_uniname_to_cstring(sb, info->Name, &uni_name);
-
- info->NumSubdirs = 2;
-
- info->Size = exfat_get_entry_size(ep2);
-
- release_entry_set(es);
-
- if (is_dir) {
- dir.dir = fid->start_clu;
- dir.flags = 0x01;
-
- if (info->Size == 0)
- info->Size = (u64)count_num_clusters(sb, &dir) <<
- p_fs->cluster_size_bits;
-
- count = count_dos_name_entries(sb, &dir, TYPE_DIR);
- if (count < 0) {
- ret = count; /* propagate error upward */
- goto out;
- }
- info->NumSubdirs += count;
- }
-
- if (p_fs->dev_ejected)
- ret = -EIO;
-
-out:
- /* release the lock for file system critical section */
- mutex_unlock(&p_fs->v_mutex);
-
- pr_debug("%s exited successfully\n", __func__);
- return ret;
-}
-
-static int ffsWriteStat(struct inode *inode, struct dir_entry_t *info)
-{
- int ret = 0;
- struct timestamp_t tm;
- struct dentry_t *ep, *ep2;
- struct entry_set_cache_t *es = NULL;
- struct super_block *sb = inode->i_sb;
- struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
- struct file_id_t *fid = &(EXFAT_I(inode)->fid);
- u8 is_dir = (fid->type == TYPE_DIR) ? 1 : 0;
-
- pr_debug("%s entered (inode %p info %p\n", __func__, inode, info);
-
- /* acquire the lock for file system critical section */
- mutex_lock(&p_fs->v_mutex);
-
- if (is_dir) {
- if ((fid->dir.dir == p_fs->root_dir) &&
- (fid->entry == -1)) {
- if (p_fs->dev_ejected)
- ret = -EIO;
- ret = 0;
- goto out;
- }
- }
-
- fs_set_vol_flags(sb, VOL_DIRTY);
-
- /* get the directory entry of given file or directory */
- es = get_entry_set_in_dir(sb, &fid->dir, fid->entry,
- ES_ALL_ENTRIES, &ep);
- if (!es) {
- ret = -ENOENT;
- goto out;
- }
- ep2 = ep + 1;
-
- exfat_set_entry_attr(ep, info->Attr);
-
- /* set FILE_INFO structure using the acquired struct dentry_t */
- tm.sec = info->CreateTimestamp.Second;
- tm.min = info->CreateTimestamp.Minute;
- tm.hour = info->CreateTimestamp.Hour;
- tm.day = info->CreateTimestamp.Day;
- tm.mon = info->CreateTimestamp.Month;
- tm.year = info->CreateTimestamp.Year;
- exfat_set_entry_time(ep, &tm, TM_CREATE);
-
- tm.sec = info->ModifyTimestamp.Second;
- tm.min = info->ModifyTimestamp.Minute;
- tm.hour = info->ModifyTimestamp.Hour;
- tm.day = info->ModifyTimestamp.Day;
- tm.mon = info->ModifyTimestamp.Month;
- tm.year = info->ModifyTimestamp.Year;
- exfat_set_entry_time(ep, &tm, TM_MODIFY);
-
- exfat_set_entry_size(ep2, info->Size);
-
- update_dir_checksum_with_entry_set(sb, es);
- release_entry_set(es);
-
- if (p_fs->dev_ejected)
- ret = -EIO;
-
-out:
- /* release the lock for file system critical section */
- mutex_unlock(&p_fs->v_mutex);
-
- pr_debug("%s exited (%d)\n", __func__, ret);
-
- return ret;
-}
-
-static int ffsMapCluster(struct inode *inode, s32 clu_offset, u32 *clu)
-{
- s32 num_clusters, num_alloced;
- bool modified = false;
- u32 last_clu;
- int ret = 0;
- struct chain_t new_clu;
- struct dentry_t *ep;
- struct entry_set_cache_t *es = NULL;
- struct super_block *sb = inode->i_sb;
- struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
- struct file_id_t *fid = &(EXFAT_I(inode)->fid);
-
- /* check the validity of pointer parameters */
- if (!clu)
- return -EINVAL;
-
- /* acquire the lock for file system critical section */
- mutex_lock(&p_fs->v_mutex);
-
- fid->rwoffset = (s64)(clu_offset) << p_fs->cluster_size_bits;
-
- if (EXFAT_I(inode)->mmu_private == 0)
- num_clusters = 0;
- else
- num_clusters = (s32)((EXFAT_I(inode)->mmu_private - 1) >>
- p_fs->cluster_size_bits) + 1;
-
- *clu = last_clu = fid->start_clu;
-
- if (fid->flags == 0x03) {
- if ((clu_offset > 0) && (*clu != CLUSTER_32(~0))) {
- last_clu += clu_offset - 1;
-
- if (clu_offset == num_clusters)
- *clu = CLUSTER_32(~0);
- else
- *clu += clu_offset;
- }
- } else {
- /* hint information */
- if ((clu_offset > 0) && (fid->hint_last_off > 0) &&
- (clu_offset >= fid->hint_last_off)) {
- clu_offset -= fid->hint_last_off;
- *clu = fid->hint_last_clu;
- }
-
- while ((clu_offset > 0) && (*clu != CLUSTER_32(~0))) {
- last_clu = *clu;
- if (exfat_fat_read(sb, *clu, clu) == -1) {
- ret = -EIO;
- goto out;
- }
- clu_offset--;
- }
- }
-
- if (*clu == CLUSTER_32(~0)) {
- fs_set_vol_flags(sb, VOL_DIRTY);
-
- new_clu.dir = (last_clu == CLUSTER_32(~0)) ? CLUSTER_32(~0) :
- last_clu + 1;
- new_clu.size = 0;
- new_clu.flags = fid->flags;
-
- /* (1) allocate a cluster */
- num_alloced = exfat_alloc_cluster(sb, 1, &new_clu);
- if (num_alloced < 0) {
- ret = -EIO;
- goto out;
- } else if (num_alloced == 0) {
- ret = -ENOSPC;
- goto out;
- }
-
- /* (2) append to the FAT chain */
- if (last_clu == CLUSTER_32(~0)) {
- if (new_clu.flags == 0x01)
- fid->flags = 0x01;
- fid->start_clu = new_clu.dir;
- modified = true;
- } else {
- if (new_clu.flags != fid->flags) {
- exfat_chain_cont_cluster(sb, fid->start_clu,
- num_clusters);
- fid->flags = 0x01;
- modified = true;
- }
- if (new_clu.flags == 0x01)
- exfat_fat_write(sb, last_clu, new_clu.dir);
- }
-
- num_clusters += num_alloced;
- *clu = new_clu.dir;
-
- es = get_entry_set_in_dir(sb, &fid->dir, fid->entry,
- ES_ALL_ENTRIES, &ep);
- if (!es) {
- ret = -ENOENT;
- goto out;
- }
- /* get stream entry */
- ep++;
-
- /* (3) update directory entry */
- if (modified) {
- if (exfat_get_entry_flag(ep) != fid->flags)
- exfat_set_entry_flag(ep, fid->flags);
-
- if (exfat_get_entry_clu0(ep) != fid->start_clu)
- exfat_set_entry_clu0(ep, fid->start_clu);
- }
-
- update_dir_checksum_with_entry_set(sb, es);
- release_entry_set(es);
-
- /* add number of new blocks to inode */
- inode->i_blocks += num_alloced << (p_fs->cluster_size_bits - 9);
- }
-
- /* hint information */
- fid->hint_last_off = (s32)(fid->rwoffset >> p_fs->cluster_size_bits);
- fid->hint_last_clu = *clu;
-
- if (p_fs->dev_ejected)
- ret = -EIO;
-
-out:
- /* release the lock for file system critical section */
- mutex_unlock(&p_fs->v_mutex);
-
- return ret;
-}
-
-/*----------------------------------------------------------------------*/
-/* Directory Operation Functions */
-/*----------------------------------------------------------------------*/
-
-static int ffsCreateDir(struct inode *inode, char *path, struct file_id_t *fid)
-{
- int ret = 0;
- struct chain_t dir;
- struct uni_name_t uni_name;
- struct super_block *sb = inode->i_sb;
- struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
-
- pr_debug("%s entered\n", __func__);
-
- /* check the validity of pointer parameters */
- if (!fid || !path || (*path == '\0'))
- return -EINVAL;
-
- /* acquire the lock for file system critical section */
- mutex_lock(&p_fs->v_mutex);
-
- /* check the validity of directory name in the given old pathname */
- ret = resolve_path(inode, path, &dir, &uni_name);
- if (ret)
- goto out;
-
- fs_set_vol_flags(sb, VOL_DIRTY);
-
- ret = create_dir(inode, &dir, &uni_name, fid);
-
-#ifndef CONFIG_STAGING_EXFAT_DELAYED_SYNC
- fs_sync(sb, true);
- fs_set_vol_flags(sb, VOL_CLEAN);
-#endif
-
- if (p_fs->dev_ejected)
- ret = -EIO;
-out:
- /* release the lock for file system critical section */
- mutex_unlock(&p_fs->v_mutex);
-
- return ret;
-}
-
-static int ffsReadDir(struct inode *inode, struct dir_entry_t *dir_entry)
-{
- int i, dentry, clu_offset;
- int ret = 0;
- s32 dentries_per_clu, dentries_per_clu_bits = 0;
- u32 type;
- sector_t sector;
- struct chain_t dir, clu;
- struct uni_name_t uni_name;
- struct timestamp_t tm;
- struct dentry_t *ep;
- struct super_block *sb = inode->i_sb;
- struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
- struct file_id_t *fid = &(EXFAT_I(inode)->fid);
-
- /* check the validity of pointer parameters */
- if (!dir_entry)
- return -EINVAL;
-
- /* check if the given file ID is opened */
- if (fid->type != TYPE_DIR)
- return -ENOTDIR;
-
- /* acquire the lock for file system critical section */
- mutex_lock(&p_fs->v_mutex);
-
- if (fid->entry == -1) {
- dir.dir = p_fs->root_dir;
- dir.flags = 0x01;
- } else {
- dir.dir = fid->start_clu;
- dir.size = (s32)(fid->size >> p_fs->cluster_size_bits);
- dir.flags = fid->flags;
- }
-
- dentry = (s32)fid->rwoffset;
-
- if (dir.dir == CLUSTER_32(0)) {
- /* FAT16 root_dir */
- dentries_per_clu = p_fs->dentries_in_root;
-
- if (dentry == dentries_per_clu) {
- clu.dir = CLUSTER_32(~0);
- } else {
- clu.dir = dir.dir;
- clu.size = dir.size;
- clu.flags = dir.flags;
- }
- } else {
- dentries_per_clu = p_fs->dentries_per_clu;
- dentries_per_clu_bits = ilog2(dentries_per_clu);
-
- clu_offset = dentry >> dentries_per_clu_bits;
- clu.dir = dir.dir;
- clu.size = dir.size;
- clu.flags = dir.flags;
-
- if (clu.flags == 0x03) {
- clu.dir += clu_offset;
- clu.size -= clu_offset;
- } else {
- /* hint_information */
- if ((clu_offset > 0) && (fid->hint_last_off > 0) &&
- (clu_offset >= fid->hint_last_off)) {
- clu_offset -= fid->hint_last_off;
- clu.dir = fid->hint_last_clu;
- }
-
- while (clu_offset > 0) {
- /* clu.dir = exfat_fat_read(sb, clu.dir); */
- if (exfat_fat_read(sb, clu.dir, &clu.dir) == -1) {
- ret = -EIO;
- goto out;
- }
- clu_offset--;
- }
- }
- }
-
- while (clu.dir != CLUSTER_32(~0)) {
- if (p_fs->dev_ejected)
- break;
-
- if (dir.dir == CLUSTER_32(0)) /* FAT16 root_dir */
- i = dentry % dentries_per_clu;
- else
- i = dentry & (dentries_per_clu - 1);
-
- for ( ; i < dentries_per_clu; i++, dentry++) {
- ep = get_entry_in_dir(sb, &clu, i, §or);
- if (!ep) {
- ret = -ENOENT;
- goto out;
- }
- type = exfat_get_entry_type(ep);
-
- if (type == TYPE_UNUSED)
- break;
-
- if ((type != TYPE_FILE) && (type != TYPE_DIR))
- continue;
-
- exfat_buf_lock(sb, sector);
- dir_entry->Attr = exfat_get_entry_attr(ep);
-
- exfat_get_entry_time(ep, &tm, TM_CREATE);
- dir_entry->CreateTimestamp.Year = tm.year;
- dir_entry->CreateTimestamp.Month = tm.mon;
- dir_entry->CreateTimestamp.Day = tm.day;
- dir_entry->CreateTimestamp.Hour = tm.hour;
- dir_entry->CreateTimestamp.Minute = tm.min;
- dir_entry->CreateTimestamp.Second = tm.sec;
- dir_entry->CreateTimestamp.MilliSecond = 0;
-
- exfat_get_entry_time(ep, &tm, TM_MODIFY);
- dir_entry->ModifyTimestamp.Year = tm.year;
- dir_entry->ModifyTimestamp.Month = tm.mon;
- dir_entry->ModifyTimestamp.Day = tm.day;
- dir_entry->ModifyTimestamp.Hour = tm.hour;
- dir_entry->ModifyTimestamp.Minute = tm.min;
- dir_entry->ModifyTimestamp.Second = tm.sec;
- dir_entry->ModifyTimestamp.MilliSecond = 0;
-
- memset((char *)&dir_entry->AccessTimestamp, 0,
- sizeof(struct date_time_t));
-
- *uni_name.name = 0x0;
- exfat_get_uni_name_from_ext_entry(sb, &dir, dentry,
- uni_name.name);
- nls_uniname_to_cstring(sb, dir_entry->Name, &uni_name);
- exfat_buf_unlock(sb, sector);
-
- ep = get_entry_in_dir(sb, &clu, i + 1, NULL);
- if (!ep) {
- ret = -ENOENT;
- goto out;
- }
-
- dir_entry->Size = exfat_get_entry_size(ep);
-
- /* hint information */
- if (dir.dir == CLUSTER_32(0)) { /* FAT16 root_dir */
- } else {
- fid->hint_last_off = dentry >>
- dentries_per_clu_bits;
- fid->hint_last_clu = clu.dir;
- }
-
- fid->rwoffset = (s64)(++dentry);
-
- if (p_fs->dev_ejected)
- ret = -EIO;
- goto out;
- }
-
- if (dir.dir == CLUSTER_32(0))
- break; /* FAT16 root_dir */
-
- if (clu.flags == 0x03) {
- if ((--clu.size) > 0)
- clu.dir++;
- else
- clu.dir = CLUSTER_32(~0);
- } else {
- /* clu.dir = exfat_fat_read(sb, clu.dir); */
- if (exfat_fat_read(sb, clu.dir, &clu.dir) == -1) {
- ret = -EIO;
- goto out;
- }
- }
- }
-
- *dir_entry->Name = '\0';
-
- fid->rwoffset = (s64)(++dentry);
-
- if (p_fs->dev_ejected)
- ret = -EIO;
-
-out:
- /* release the lock for file system critical section */
- mutex_unlock(&p_fs->v_mutex);
-
- return ret;
-}
-
-static int ffsRemoveDir(struct inode *inode, struct file_id_t *fid)
-{
- s32 dentry;
- int ret = 0;
- struct chain_t dir, clu_to_free;
- struct super_block *sb = inode->i_sb;
- struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
-
- /* check the validity of the given file id */
- if (!fid)
- return -EINVAL;
-
- dir.dir = fid->dir.dir;
- dir.size = fid->dir.size;
- dir.flags = fid->dir.flags;
-
- dentry = fid->entry;
-
- /* check if the file is "." or ".." */
- if (p_fs->vol_type != EXFAT) {
- if ((dir.dir != p_fs->root_dir) && (dentry < 2))
- return -EPERM;
- }
-
- /* acquire the lock for file system critical section */
- mutex_lock(&p_fs->v_mutex);
-
- clu_to_free.dir = fid->start_clu;
- clu_to_free.size = (s32)((fid->size - 1) >> p_fs->cluster_size_bits) + 1;
- clu_to_free.flags = fid->flags;
-
- if (!is_dir_empty(sb, &clu_to_free)) {
- ret = -ENOTEMPTY;
- goto out;
- }
-
- fs_set_vol_flags(sb, VOL_DIRTY);
-
- /* (1) update the directory entry */
- remove_file(inode, &dir, dentry);
-
- /* (2) free the clusters */
- exfat_free_cluster(sb, &clu_to_free, 1);
-
- fid->size = 0;
- fid->start_clu = CLUSTER_32(~0);
- fid->flags = (p_fs->vol_type == EXFAT) ? 0x03 : 0x01;
-
-#ifndef CONFIG_STAGING_EXFAT_DELAYED_SYNC
- fs_sync(sb, true);
- fs_set_vol_flags(sb, VOL_CLEAN);
-#endif
-
- if (p_fs->dev_ejected)
- ret = -EIO;
-
-out:
- /* release the lock for file system critical section */
- mutex_unlock(&p_fs->v_mutex);
-
- return ret;
-}
-
-/*======================================================================*/
-/* Directory Entry Operations */
-/*======================================================================*/
-
-static int exfat_readdir(struct file *filp, struct dir_context *ctx)
-{
- struct inode *inode = file_inode(filp);
- struct super_block *sb = inode->i_sb;
- struct exfat_sb_info *sbi = EXFAT_SB(sb);
- struct fs_info_t *p_fs = &sbi->fs_info;
- struct bd_info_t *p_bd = &(EXFAT_SB(sb)->bd_info);
- struct dir_entry_t de;
- unsigned long inum;
- loff_t cpos;
- int err = 0;
-
- __lock_super(sb);
-
- cpos = ctx->pos;
- /* Fake . and .. for the root directory. */
- if ((p_fs->vol_type == EXFAT) || (inode->i_ino == EXFAT_ROOT_INO)) {
- while (cpos < 2) {
- if (inode->i_ino == EXFAT_ROOT_INO)
- inum = EXFAT_ROOT_INO;
- else if (cpos == 0)
- inum = inode->i_ino;
- else /* (cpos == 1) */
- inum = parent_ino(filp->f_path.dentry);
-
- if (!dir_emit_dots(filp, ctx))
- goto out;
- cpos++;
- ctx->pos++;
- }
- if (cpos == 2)
- cpos = 0;
- }
- if (cpos & (DENTRY_SIZE - 1)) {
- err = -ENOENT;
- goto out;
- }
-
-get_new:
- EXFAT_I(inode)->fid.size = i_size_read(inode);
- EXFAT_I(inode)->fid.rwoffset = cpos >> DENTRY_SIZE_BITS;
-
- err = ffsReadDir(inode, &de);
- if (err) {
- /* at least we tried to read a sector
- * move cpos to next sector position (should be aligned)
- */
- if (err == -EIO) {
- cpos += 1 << p_bd->sector_size_bits;
- cpos &= ~((1 << p_bd->sector_size_bits) - 1);
- }
-
- goto end_of_dir;
- }
-
- cpos = EXFAT_I(inode)->fid.rwoffset << DENTRY_SIZE_BITS;
-
- if (!de.Name[0])
- goto end_of_dir;
-
- if (!memcmp(de.ShortName, DOS_CUR_DIR_NAME, DOS_NAME_LENGTH)) {
- inum = inode->i_ino;
- } else if (!memcmp(de.ShortName, DOS_PAR_DIR_NAME, DOS_NAME_LENGTH)) {
- inum = parent_ino(filp->f_path.dentry);
- } else {
- loff_t i_pos = ((loff_t)EXFAT_I(inode)->fid.start_clu << 32) |
- ((EXFAT_I(inode)->fid.rwoffset - 1) & 0xffffffff);
- struct inode *tmp = exfat_iget(sb, i_pos);
-
- if (tmp) {
- inum = tmp->i_ino;
- iput(tmp);
- } else {
- inum = iunique(sb, EXFAT_ROOT_INO);
- }
- }
-
- if (!dir_emit(ctx, de.Name, strlen(de.Name), inum,
- (de.Attr & ATTR_SUBDIR) ? DT_DIR : DT_REG))
- goto out;
-
- ctx->pos = cpos;
- goto get_new;
-
-end_of_dir:
- ctx->pos = cpos;
-out:
- __unlock_super(sb);
- return err;
-}
-
-static int exfat_ioctl_volume_id(struct inode *dir)
-{
- struct super_block *sb = dir->i_sb;
- struct exfat_sb_info *sbi = EXFAT_SB(sb);
- struct fs_info_t *p_fs = &sbi->fs_info;
-
- return p_fs->vol_id;
-}
-
-static long exfat_generic_ioctl(struct file *filp, unsigned int cmd,
- unsigned long arg)
-{
- struct inode *inode = filp->f_path.dentry->d_inode;
-#ifdef CONFIG_STAGING_EXFAT_KERNEL_DEBUG
- unsigned int flags;
-#endif /* CONFIG_STAGING_EXFAT_KERNEL_DEBUG */
-
- switch (cmd) {
- case EXFAT_IOCTL_GET_VOLUME_ID:
- return exfat_ioctl_volume_id(inode);
-#ifdef CONFIG_STAGING_EXFAT_KERNEL_DEBUG
- case EXFAT_IOC_GET_DEBUGFLAGS: {
- struct super_block *sb = inode->i_sb;
- struct exfat_sb_info *sbi = EXFAT_SB(sb);
-
- flags = sbi->debug_flags;
- return put_user(flags, (int __user *)arg);
- }
- case EXFAT_IOC_SET_DEBUGFLAGS: {
- struct super_block *sb = inode->i_sb;
- struct exfat_sb_info *sbi = EXFAT_SB(sb);
-
- if (!capable(CAP_SYS_ADMIN))
- return -EPERM;
-
- if (get_user(flags, (int __user *)arg))
- return -EFAULT;
-
- __lock_super(sb);
- sbi->debug_flags = flags;
- __unlock_super(sb);
-
- return 0;
- }
-#endif /* CONFIG_STAGING_EXFAT_KERNEL_DEBUG */
- default:
- return -ENOTTY; /* Inappropriate ioctl for device */
- }
-}
-
-static const struct file_operations exfat_dir_operations = {
- .llseek = generic_file_llseek,
- .read = generic_read_dir,
- .iterate = exfat_readdir,
- .unlocked_ioctl = exfat_generic_ioctl,
- .fsync = generic_file_fsync,
-};
-
-static int exfat_create(struct inode *dir, struct dentry *dentry, umode_t mode,
- bool excl)
-{
- struct super_block *sb = dir->i_sb;
- struct timespec64 curtime;
- struct inode *inode;
- struct file_id_t fid;
- loff_t i_pos;
- int err;
-
- __lock_super(sb);
-
- pr_debug("%s entered\n", __func__);
-
- err = ffsCreateFile(dir, (u8 *)dentry->d_name.name, FM_REGULAR, &fid);
- if (err)
- goto out;
-
- INC_IVERSION(dir);
- curtime = current_time(dir);
- dir->i_ctime = curtime;
- dir->i_mtime = curtime;
- dir->i_atime = curtime;
- if (IS_DIRSYNC(dir))
- (void)exfat_sync_inode(dir);
- else
- mark_inode_dirty(dir);
-
- i_pos = ((loff_t)fid.dir.dir << 32) | (fid.entry & 0xffffffff);
-
- inode = exfat_build_inode(sb, &fid, i_pos);
- if (IS_ERR(inode)) {
- err = PTR_ERR(inode);
- goto out;
- }
- INC_IVERSION(inode);
- curtime = current_time(inode);
- inode->i_mtime = curtime;
- inode->i_atime = curtime;
- inode->i_ctime = curtime;
- /*
- * timestamp is already written, so mark_inode_dirty() is unnecessary.
- */
-
- dentry->d_time = GET_IVERSION(dentry->d_parent->d_inode);
- d_instantiate(dentry, inode);
-
-out:
- __unlock_super(sb);
- pr_debug("%s exited\n", __func__);
- return err;
-}
-
-static int exfat_find(struct inode *dir, struct qstr *qname,
- struct file_id_t *fid)
-{
- int err;
-
- if (qname->len == 0)
- return -ENOENT;
-
- err = ffsLookupFile(dir, (u8 *)qname->name, fid);
- if (err)
- return -ENOENT;
-
- return 0;
-}
-
-static int exfat_d_anon_disconn(struct dentry *dentry)
-{
- return IS_ROOT(dentry) && (dentry->d_flags & DCACHE_DISCONNECTED);
-}
-
-static struct dentry *exfat_lookup(struct inode *dir, struct dentry *dentry,
- unsigned int flags)
-{
- struct super_block *sb = dir->i_sb;
- struct inode *inode;
- struct dentry *alias;
- int err;
- struct file_id_t fid;
- loff_t i_pos;
- u64 ret;
- mode_t i_mode;
-
- __lock_super(sb);
- pr_debug("%s entered\n", __func__);
- err = exfat_find(dir, &dentry->d_name, &fid);
- if (err) {
- if (err == -ENOENT) {
- inode = NULL;
- goto out;
- }
- goto error;
- }
-
- i_pos = ((loff_t)fid.dir.dir << 32) | (fid.entry & 0xffffffff);
- inode = exfat_build_inode(sb, &fid, i_pos);
- if (IS_ERR(inode)) {
- err = PTR_ERR(inode);
- goto error;
- }
-
- i_mode = inode->i_mode;
- if (S_ISLNK(i_mode) && !EXFAT_I(inode)->target) {
- EXFAT_I(inode)->target = kmalloc(i_size_read(inode) + 1,
- GFP_KERNEL);
- if (!EXFAT_I(inode)->target) {
- err = -ENOMEM;
- goto error;
- }
- ffsReadFile(dir, &fid, EXFAT_I(inode)->target,
- i_size_read(inode), &ret);
- *(EXFAT_I(inode)->target + i_size_read(inode)) = '\0';
- }
-
- alias = d_find_alias(inode);
- if (alias && !exfat_d_anon_disconn(alias)) {
- BUG_ON(d_unhashed(alias));
- if (!S_ISDIR(i_mode))
- d_move(alias, dentry);
- iput(inode);
- __unlock_super(sb);
- pr_debug("%s exited 1\n", __func__);
- return alias;
- }
- dput(alias);
-out:
- __unlock_super(sb);
- dentry->d_time = GET_IVERSION(dentry->d_parent->d_inode);
- dentry = d_splice_alias(inode, dentry);
- if (dentry)
- dentry->d_time = GET_IVERSION(dentry->d_parent->d_inode);
- pr_debug("%s exited 2\n", __func__);
- return dentry;
-
-error:
- __unlock_super(sb);
- pr_debug("%s exited 3\n", __func__);
- return ERR_PTR(err);
-}
-
-static inline unsigned long exfat_hash(loff_t i_pos)
-{
- return hash_32(i_pos, EXFAT_HASH_BITS);
-}
-
-static void exfat_attach(struct inode *inode, loff_t i_pos)
-{
- struct exfat_sb_info *sbi = EXFAT_SB(inode->i_sb);
- struct hlist_head *head = sbi->inode_hashtable + exfat_hash(i_pos);
-
- spin_lock(&sbi->inode_hash_lock);
- EXFAT_I(inode)->i_pos = i_pos;
- hlist_add_head(&EXFAT_I(inode)->i_hash_fat, head);
- spin_unlock(&sbi->inode_hash_lock);
-}
-
-static void exfat_detach(struct inode *inode)
-{
- struct exfat_sb_info *sbi = EXFAT_SB(inode->i_sb);
-
- spin_lock(&sbi->inode_hash_lock);
- hlist_del_init(&EXFAT_I(inode)->i_hash_fat);
- EXFAT_I(inode)->i_pos = 0;
- spin_unlock(&sbi->inode_hash_lock);
-}
-
-static int exfat_unlink(struct inode *dir, struct dentry *dentry)
-{
- struct inode *inode = dentry->d_inode;
- struct super_block *sb = dir->i_sb;
- struct timespec64 curtime;
- int err;
-
- __lock_super(sb);
-
- pr_debug("%s entered\n", __func__);
-
- EXFAT_I(inode)->fid.size = i_size_read(inode);
-
- err = ffsRemoveFile(dir, &(EXFAT_I(inode)->fid));
- if (err)
- goto out;
-
- INC_IVERSION(dir);
- curtime = current_time(dir);
- dir->i_mtime = curtime;
- dir->i_atime = curtime;
- if (IS_DIRSYNC(dir))
- (void)exfat_sync_inode(dir);
- else
- mark_inode_dirty(dir);
-
- clear_nlink(inode);
- curtime = current_time(inode);
- inode->i_mtime = curtime;
- inode->i_atime = curtime;
- exfat_detach(inode);
- remove_inode_hash(inode);
-
-out:
- __unlock_super(sb);
- pr_debug("%s exited\n", __func__);
- return err;
-}
-
-static int exfat_symlink(struct inode *dir, struct dentry *dentry,
- const char *target)
-{
- struct super_block *sb = dir->i_sb;
- struct timespec64 curtime;
- struct inode *inode;
- struct file_id_t fid;
- loff_t i_pos;
- int err;
- u64 len = (u64)strlen(target);
- u64 ret;
-
- __lock_super(sb);
-
- pr_debug("%s entered\n", __func__);
-
- err = ffsCreateFile(dir, (u8 *)dentry->d_name.name, FM_SYMLINK, &fid);
- if (err)
- goto out;
-
-
- err = ffsWriteFile(dir, &fid, (char *)target, len, &ret);
-
- if (err) {
- ffsRemoveFile(dir, &fid);
- goto out;
- }
-
- INC_IVERSION(dir);
- curtime = current_time(dir);
- dir->i_ctime = curtime;
- dir->i_mtime = curtime;
- dir->i_atime = curtime;
- if (IS_DIRSYNC(dir))
- (void)exfat_sync_inode(dir);
- else
- mark_inode_dirty(dir);
-
- i_pos = ((loff_t)fid.dir.dir << 32) | (fid.entry & 0xffffffff);
-
- inode = exfat_build_inode(sb, &fid, i_pos);
- if (IS_ERR(inode)) {
- err = PTR_ERR(inode);
- goto out;
- }
- INC_IVERSION(inode);
- curtime = current_time(inode);
- inode->i_mtime = curtime;
- inode->i_atime = curtime;
- inode->i_ctime = curtime;
- /* timestamp is already written, so mark_inode_dirty() is unneeded. */
-
- EXFAT_I(inode)->target = kmemdup(target, len + 1, GFP_KERNEL);
- if (!EXFAT_I(inode)->target) {
- err = -ENOMEM;
- goto out;
- }
-
- dentry->d_time = GET_IVERSION(dentry->d_parent->d_inode);
- d_instantiate(dentry, inode);
-
-out:
- __unlock_super(sb);
- pr_debug("%s exited\n", __func__);
- return err;
-}
-
-static int exfat_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
-{
- struct super_block *sb = dir->i_sb;
- struct timespec64 curtime;
- struct inode *inode;
- struct file_id_t fid;
- loff_t i_pos;
- int err;
-
- __lock_super(sb);
-
- pr_debug("%s entered\n", __func__);
-
- err = ffsCreateDir(dir, (u8 *)dentry->d_name.name, &fid);
- if (err)
- goto out;
-
- INC_IVERSION(dir);
- curtime = current_time(dir);
- dir->i_ctime = curtime;
- dir->i_mtime = curtime;
- dir->i_atime = curtime;
- if (IS_DIRSYNC(dir))
- (void)exfat_sync_inode(dir);
- else
- mark_inode_dirty(dir);
- inc_nlink(dir);
-
- i_pos = ((loff_t)fid.dir.dir << 32) | (fid.entry & 0xffffffff);
-
- inode = exfat_build_inode(sb, &fid, i_pos);
- if (IS_ERR(inode)) {
- err = PTR_ERR(inode);
- goto out;
- }
- INC_IVERSION(inode);
- curtime = current_time(inode);
- inode->i_mtime = curtime;
- inode->i_atime = curtime;
- inode->i_ctime = curtime;
- /* timestamp is already written, so mark_inode_dirty() is unneeded. */
-
- dentry->d_time = GET_IVERSION(dentry->d_parent->d_inode);
- d_instantiate(dentry, inode);
-
-out:
- __unlock_super(sb);
- pr_debug("%s exited\n", __func__);
- return err;
-}
-
-static int exfat_rmdir(struct inode *dir, struct dentry *dentry)
-{
- struct inode *inode = dentry->d_inode;
- struct super_block *sb = dir->i_sb;
- struct timespec64 curtime;
- int err;
-
- __lock_super(sb);
-
- pr_debug("%s entered\n", __func__);
-
- EXFAT_I(inode)->fid.size = i_size_read(inode);
-
- err = ffsRemoveDir(dir, &(EXFAT_I(inode)->fid));
- if (err)
- goto out;
-
- INC_IVERSION(dir);
- curtime = current_time(dir);
- dir->i_mtime = curtime;
- dir->i_atime = curtime;
- if (IS_DIRSYNC(dir))
- (void)exfat_sync_inode(dir);
- else
- mark_inode_dirty(dir);
- drop_nlink(dir);
-
- clear_nlink(inode);
- curtime = current_time(inode);
- inode->i_mtime = curtime;
- inode->i_atime = curtime;
- exfat_detach(inode);
- remove_inode_hash(inode);
-
-out:
- __unlock_super(sb);
- pr_debug("%s exited\n", __func__);
- return err;
-}
-
-static int exfat_rename(struct inode *old_dir, struct dentry *old_dentry,
- struct inode *new_dir, struct dentry *new_dentry,
- unsigned int flags)
-{
- struct inode *old_inode, *new_inode;
- struct super_block *sb = old_dir->i_sb;
- struct timespec64 curtime;
- loff_t i_pos;
- int err;
-
- if (flags)
- return -EINVAL;
-
- __lock_super(sb);
-
- pr_debug("%s entered\n", __func__);
-
- old_inode = old_dentry->d_inode;
- new_inode = new_dentry->d_inode;
-
- EXFAT_I(old_inode)->fid.size = i_size_read(old_inode);
-
- err = ffsMoveFile(old_dir, &(EXFAT_I(old_inode)->fid), new_dir,
- new_dentry);
- if (err)
- goto out;
-
- INC_IVERSION(new_dir);
- curtime = current_time(new_dir);
- new_dir->i_ctime = curtime;
- new_dir->i_mtime = curtime;
- new_dir->i_atime = curtime;
-
- if (IS_DIRSYNC(new_dir))
- (void)exfat_sync_inode(new_dir);
- else
- mark_inode_dirty(new_dir);
-
- i_pos = ((loff_t)EXFAT_I(old_inode)->fid.dir.dir << 32) |
- (EXFAT_I(old_inode)->fid.entry & 0xffffffff);
-
- exfat_detach(old_inode);
- exfat_attach(old_inode, i_pos);
- if (IS_DIRSYNC(new_dir))
- (void)exfat_sync_inode(old_inode);
- else
- mark_inode_dirty(old_inode);
-
- if ((S_ISDIR(old_inode->i_mode)) && (old_dir != new_dir)) {
- drop_nlink(old_dir);
- if (!new_inode)
- inc_nlink(new_dir);
- }
- INC_IVERSION(old_dir);
- curtime = current_time(old_dir);
- old_dir->i_ctime = curtime;
- old_dir->i_mtime = curtime;
- if (IS_DIRSYNC(old_dir))
- (void)exfat_sync_inode(old_dir);
- else
- mark_inode_dirty(old_dir);
-
- if (new_inode) {
- exfat_detach(new_inode);
- drop_nlink(new_inode);
- if (S_ISDIR(new_inode->i_mode))
- drop_nlink(new_inode);
- new_inode->i_ctime = current_time(new_inode);
- }
-
-out:
- __unlock_super(sb);
- pr_debug("%s exited\n", __func__);
- return err;
-}
-
-static int exfat_cont_expand(struct inode *inode, loff_t size)
-{
- struct address_space *mapping = inode->i_mapping;
- loff_t start = i_size_read(inode), count = size - i_size_read(inode);
- struct timespec64 curtime;
- int err, err2;
-
- err = generic_cont_expand_simple(inode, size);
- if (err != 0)
- return err;
-
- curtime = current_time(inode);
- inode->i_ctime = curtime;
- inode->i_mtime = curtime;
- mark_inode_dirty(inode);
-
- if (IS_SYNC(inode)) {
- err = filemap_fdatawrite_range(mapping, start,
- start + count - 1);
- err2 = sync_mapping_buffers(mapping);
- err = (err) ? (err) : (err2);
- err2 = write_inode_now(inode, 1);
- err = (err) ? (err) : (err2);
- if (!err)
- err = filemap_fdatawait_range(mapping, start,
- start + count - 1);
- }
- return err;
-}
-
-static int exfat_allow_set_time(struct exfat_sb_info *sbi, struct inode *inode)
-{
- mode_t allow_utime = sbi->options.allow_utime;
-
- if (!uid_eq(current_fsuid(), inode->i_uid)) {
- if (in_group_p(inode->i_gid))
- allow_utime >>= 3;
- if (allow_utime & MAY_WRITE)
- return 1;
- }
-
- /* use a default check */
- return 0;
-}
-
-static int exfat_sanitize_mode(const struct exfat_sb_info *sbi,
- struct inode *inode, umode_t *mode_ptr)
-{
- mode_t i_mode, mask, perm;
-
- i_mode = inode->i_mode;
-
- if (S_ISREG(i_mode) || S_ISLNK(i_mode))
- mask = sbi->options.fs_fmask;
- else
- mask = sbi->options.fs_dmask;
-
- perm = *mode_ptr & ~(S_IFMT | mask);
-
- /* Of the r and x bits, all (subject to umask) must be present.*/
- if ((perm & 0555) != (i_mode & 0555))
- return -EPERM;
-
- if (exfat_mode_can_hold_ro(inode)) {
- /*
- * Of the w bits, either all (subject to umask) or none must be
- * present.
- */
- if ((perm & 0222) && ((perm & 0222) != (0222 & ~mask)))
- return -EPERM;
- } else {
- /*
- * If exfat_mode_can_hold_ro(inode) is false, can't change w
- * bits.
- */
- if ((perm & 0222) != (0222 & ~mask))
- return -EPERM;
- }
-
- *mode_ptr &= S_IFMT | perm;
-
- return 0;
-}
-
-static void exfat_truncate(struct inode *inode, loff_t old_size)
-{
- struct super_block *sb = inode->i_sb;
- struct exfat_sb_info *sbi = EXFAT_SB(sb);
- struct fs_info_t *p_fs = &sbi->fs_info;
- struct timespec64 curtime;
- int err;
-
- __lock_super(sb);
-
- /*
- * This protects against truncating a file bigger than it was then
- * trying to write into the hole.
- */
- if (EXFAT_I(inode)->mmu_private > i_size_read(inode))
- EXFAT_I(inode)->mmu_private = i_size_read(inode);
-
- if (EXFAT_I(inode)->fid.start_clu == 0)
- goto out;
-
- err = ffsTruncateFile(inode, old_size, i_size_read(inode));
- if (err)
- goto out;
-
- curtime = current_time(inode);
- inode->i_ctime = curtime;
- inode->i_mtime = curtime;
- if (IS_DIRSYNC(inode))
- (void)exfat_sync_inode(inode);
- else
- mark_inode_dirty(inode);
-
- inode->i_blocks = ((i_size_read(inode) + (p_fs->cluster_size - 1)) &
- ~((loff_t)p_fs->cluster_size - 1)) >> 9;
-out:
- __unlock_super(sb);
-}
-
-static int exfat_setattr(struct dentry *dentry, struct iattr *attr)
-{
- struct exfat_sb_info *sbi = EXFAT_SB(dentry->d_sb);
- struct inode *inode = dentry->d_inode;
- unsigned int ia_valid;
- int error;
- loff_t old_size;
-
- pr_debug("%s entered\n", __func__);
-
- if ((attr->ia_valid & ATTR_SIZE) &&
- attr->ia_size > i_size_read(inode)) {
- error = exfat_cont_expand(inode, attr->ia_size);
- if (error || attr->ia_valid == ATTR_SIZE)
- return error;
- attr->ia_valid &= ~ATTR_SIZE;
- }
-
- ia_valid = attr->ia_valid;
-
- if ((ia_valid & (ATTR_MTIME_SET | ATTR_ATIME_SET | ATTR_TIMES_SET)) &&
- exfat_allow_set_time(sbi, inode)) {
- attr->ia_valid &= ~(ATTR_MTIME_SET |
- ATTR_ATIME_SET |
- ATTR_TIMES_SET);
- }
-
- error = setattr_prepare(dentry, attr);
- attr->ia_valid = ia_valid;
- if (error)
- return error;
-
- if (((attr->ia_valid & ATTR_UID) &&
- (!uid_eq(attr->ia_uid, sbi->options.fs_uid))) ||
- ((attr->ia_valid & ATTR_GID) &&
- (!gid_eq(attr->ia_gid, sbi->options.fs_gid))) ||
- ((attr->ia_valid & ATTR_MODE) &&
- (attr->ia_mode & ~(S_IFREG | S_IFLNK | S_IFDIR | 0777)))) {
- return -EPERM;
- }
-
- /*
- * We don't return -EPERM here. Yes, strange, but this is too
- * old behavior.
- */
- if (attr->ia_valid & ATTR_MODE) {
- if (exfat_sanitize_mode(sbi, inode, &attr->ia_mode) < 0)
- attr->ia_valid &= ~ATTR_MODE;
- }
-
- EXFAT_I(inode)->fid.size = i_size_read(inode);
-
- if (attr->ia_valid & ATTR_SIZE) {
- old_size = i_size_read(inode);
- down_write(&EXFAT_I(inode)->truncate_lock);
- truncate_setsize(inode, attr->ia_size);
- exfat_truncate(inode, old_size);
- up_write(&EXFAT_I(inode)->truncate_lock);
- }
- setattr_copy(inode, attr);
- mark_inode_dirty(inode);
-
- pr_debug("%s exited\n", __func__);
- return error;
-}
-
-static int exfat_getattr(const struct path *path, struct kstat *stat,
- u32 request_mask, unsigned int flags)
-{
- struct inode *inode = path->dentry->d_inode;
-
- pr_debug("%s entered\n", __func__);
-
- generic_fillattr(inode, stat);
- stat->blksize = EXFAT_SB(inode->i_sb)->fs_info.cluster_size;
-
- pr_debug("%s exited\n", __func__);
- return 0;
-}
-
-static const struct inode_operations exfat_dir_inode_operations = {
- .create = exfat_create,
- .lookup = exfat_lookup,
- .unlink = exfat_unlink,
- .symlink = exfat_symlink,
- .mkdir = exfat_mkdir,
- .rmdir = exfat_rmdir,
- .rename = exfat_rename,
- .setattr = exfat_setattr,
- .getattr = exfat_getattr,
-};
-
-/*======================================================================*/
-/* File Operations */
-/*======================================================================*/
-static const char *exfat_get_link(struct dentry *dentry, struct inode *inode,
- struct delayed_call *done)
-{
- struct exfat_inode_info *ei = EXFAT_I(inode);
-
- if (ei->target) {
- char *cookie = ei->target;
-
- if (cookie)
- return (char *)(ei->target);
- }
- return NULL;
-}
-
-static const struct inode_operations exfat_symlink_inode_operations = {
- .get_link = exfat_get_link,
-};
-
-static int exfat_file_release(struct inode *inode, struct file *filp)
-{
- struct super_block *sb = inode->i_sb;
-
- EXFAT_I(inode)->fid.size = i_size_read(inode);
- ffsSyncVol(sb, false);
- return 0;
-}
-
-static const struct file_operations exfat_file_operations = {
- .llseek = generic_file_llseek,
- .read_iter = generic_file_read_iter,
- .write_iter = generic_file_write_iter,
- .mmap = generic_file_mmap,
- .release = exfat_file_release,
- .unlocked_ioctl = exfat_generic_ioctl,
- .fsync = generic_file_fsync,
- .splice_read = generic_file_splice_read,
-};
-
-static const struct inode_operations exfat_file_inode_operations = {
- .setattr = exfat_setattr,
- .getattr = exfat_getattr,
-};
-
-/*======================================================================*/
-/* Address Space Operations */
-/*======================================================================*/
-
-static int exfat_bmap(struct inode *inode, sector_t sector, sector_t *phys,
- unsigned long *mapped_blocks, int *create)
-{
- struct super_block *sb = inode->i_sb;
- struct exfat_sb_info *sbi = EXFAT_SB(sb);
- struct fs_info_t *p_fs = &sbi->fs_info;
- const unsigned long blocksize = sb->s_blocksize;
- const unsigned char blocksize_bits = sb->s_blocksize_bits;
- sector_t last_block;
- int err, clu_offset, sec_offset;
- unsigned int cluster;
-
- *phys = 0;
- *mapped_blocks = 0;
-
- last_block = (i_size_read(inode) + (blocksize - 1)) >> blocksize_bits;
- if (sector >= last_block) {
- if (*create == 0)
- return 0;
- } else {
- *create = 0;
- }
-
- /* cluster offset */
- clu_offset = sector >> p_fs->sectors_per_clu_bits;
-
- /* sector offset in cluster */
- sec_offset = sector & (p_fs->sectors_per_clu - 1);
-
- EXFAT_I(inode)->fid.size = i_size_read(inode);
-
- err = ffsMapCluster(inode, clu_offset, &cluster);
-
- if (!err && (cluster != CLUSTER_32(~0))) {
- *phys = START_SECTOR(cluster) + sec_offset;
- *mapped_blocks = p_fs->sectors_per_clu - sec_offset;
- }
-
- return 0;
-}
-
-static int exfat_get_block(struct inode *inode, sector_t iblock,
- struct buffer_head *bh_result, int create)
-{
- struct super_block *sb = inode->i_sb;
- unsigned long max_blocks = bh_result->b_size >> inode->i_blkbits;
- int err;
- unsigned long mapped_blocks;
- sector_t phys;
-
- __lock_super(sb);
-
- err = exfat_bmap(inode, iblock, &phys, &mapped_blocks, &create);
- if (err) {
- __unlock_super(sb);
- return err;
- }
-
- if (phys) {
- max_blocks = min(mapped_blocks, max_blocks);
- if (create) {
- EXFAT_I(inode)->mmu_private += max_blocks <<
- sb->s_blocksize_bits;
- set_buffer_new(bh_result);
- }
- map_bh(bh_result, sb, phys);
- }
-
- bh_result->b_size = max_blocks << sb->s_blocksize_bits;
- __unlock_super(sb);
-
- return 0;
-}
-
-static int exfat_readpage(struct file *file, struct page *page)
-{
- return mpage_readpage(page, exfat_get_block);
-}
-
-static int exfat_readpages(struct file *file, struct address_space *mapping,
- struct list_head *pages, unsigned int nr_pages)
-{
- return mpage_readpages(mapping, pages, nr_pages, exfat_get_block);
-}
-
-static int exfat_writepage(struct page *page, struct writeback_control *wbc)
-{
- return block_write_full_page(page, exfat_get_block, wbc);
-}
-
-static int exfat_writepages(struct address_space *mapping,
- struct writeback_control *wbc)
-{
- return mpage_writepages(mapping, wbc, exfat_get_block);
-}
-
-static void exfat_write_failed(struct address_space *mapping, loff_t to)
-{
- struct inode *inode = mapping->host;
-
- if (to > i_size_read(inode)) {
- truncate_pagecache(inode, i_size_read(inode));
- EXFAT_I(inode)->fid.size = i_size_read(inode);
- exfat_truncate(inode, i_size_read(inode));
- }
-}
-
-static int exfat_write_begin(struct file *file, struct address_space *mapping,
- loff_t pos, unsigned int len, unsigned int flags,
- struct page **pagep, void **fsdata)
-{
- int ret;
-
- *pagep = NULL;
- ret = cont_write_begin(file, mapping, pos, len, flags, pagep, fsdata,
- exfat_get_block,
- &EXFAT_I(mapping->host)->mmu_private);
-
- if (ret < 0)
- exfat_write_failed(mapping, pos + len);
- return ret;
-}
-
-static int exfat_write_end(struct file *file, struct address_space *mapping,
- loff_t pos, unsigned int len, unsigned int copied,
- struct page *pagep, void *fsdata)
-{
- struct inode *inode = mapping->host;
- struct file_id_t *fid = &(EXFAT_I(inode)->fid);
- struct timespec64 curtime;
- int err;
-
- err = generic_write_end(file, mapping, pos, len, copied, pagep, fsdata);
-
- if (err < len)
- exfat_write_failed(mapping, pos + len);
-
- if (!(err < 0) && !(fid->attr & ATTR_ARCHIVE)) {
- curtime = current_time(inode);
- inode->i_mtime = curtime;
- inode->i_ctime = curtime;
- fid->attr |= ATTR_ARCHIVE;
- mark_inode_dirty(inode);
- }
- return err;
-}
-
-static ssize_t exfat_direct_IO(struct kiocb *iocb, struct iov_iter *iter)
-{
- struct inode *inode = iocb->ki_filp->f_mapping->host;
- struct address_space *mapping = iocb->ki_filp->f_mapping;
- ssize_t ret;
- int rw;
-
- rw = iov_iter_rw(iter);
-
- if (rw == WRITE) {
- if (EXFAT_I(inode)->mmu_private < iov_iter_count(iter))
- return 0;
- }
- ret = blockdev_direct_IO(iocb, inode, iter, exfat_get_block);
-
- if ((ret < 0) && (rw & WRITE))
- exfat_write_failed(mapping, iov_iter_count(iter));
- return ret;
-}
-
-static sector_t _exfat_bmap(struct address_space *mapping, sector_t block)
-{
- sector_t blocknr;
-
- /* exfat_get_cluster() assumes the requested blocknr isn't truncated. */
- down_read(&EXFAT_I(mapping->host)->truncate_lock);
- blocknr = generic_block_bmap(mapping, block, exfat_get_block);
- up_read(&EXFAT_I(mapping->host)->truncate_lock);
-
- return blocknr;
-}
-
-static const struct address_space_operations exfat_aops = {
- .readpage = exfat_readpage,
- .readpages = exfat_readpages,
- .writepage = exfat_writepage,
- .writepages = exfat_writepages,
- .write_begin = exfat_write_begin,
- .write_end = exfat_write_end,
- .direct_IO = exfat_direct_IO,
- .bmap = _exfat_bmap
-};
-
-/*======================================================================*/
-/* Super Operations */
-/*======================================================================*/
-
-static struct inode *exfat_iget(struct super_block *sb, loff_t i_pos)
-{
- struct exfat_sb_info *sbi = EXFAT_SB(sb);
- struct exfat_inode_info *info;
- struct hlist_head *head = sbi->inode_hashtable + exfat_hash(i_pos);
- struct inode *inode = NULL;
-
- spin_lock(&sbi->inode_hash_lock);
- hlist_for_each_entry(info, head, i_hash_fat) {
- BUG_ON(info->vfs_inode.i_sb != sb);
-
- if (i_pos != info->i_pos)
- continue;
- inode = igrab(&info->vfs_inode);
- if (inode)
- break;
- }
- spin_unlock(&sbi->inode_hash_lock);
- return inode;
-}
-
-/* doesn't deal with root inode */
-static int exfat_fill_inode(struct inode *inode, struct file_id_t *fid)
-{
- struct exfat_sb_info *sbi = EXFAT_SB(inode->i_sb);
- struct fs_info_t *p_fs = &sbi->fs_info;
- struct dir_entry_t info;
-
- memcpy(&(EXFAT_I(inode)->fid), fid, sizeof(struct file_id_t));
-
- ffsReadStat(inode, &info);
-
- EXFAT_I(inode)->i_pos = 0;
- EXFAT_I(inode)->target = NULL;
- inode->i_uid = sbi->options.fs_uid;
- inode->i_gid = sbi->options.fs_gid;
- INC_IVERSION(inode);
- inode->i_generation = prandom_u32();
-
- if (info.Attr & ATTR_SUBDIR) { /* directory */
- inode->i_generation &= ~1;
- inode->i_mode = exfat_make_mode(sbi, info.Attr, 0777);
- inode->i_op = &exfat_dir_inode_operations;
- inode->i_fop = &exfat_dir_operations;
-
- i_size_write(inode, info.Size);
- EXFAT_I(inode)->mmu_private = i_size_read(inode);
- set_nlink(inode, info.NumSubdirs);
- } else if (info.Attr & ATTR_SYMLINK) { /* symbolic link */
- inode->i_generation |= 1;
- inode->i_mode = exfat_make_mode(sbi, info.Attr, 0777);
- inode->i_op = &exfat_symlink_inode_operations;
-
- i_size_write(inode, info.Size);
- EXFAT_I(inode)->mmu_private = i_size_read(inode);
- } else { /* regular file */
- inode->i_generation |= 1;
- inode->i_mode = exfat_make_mode(sbi, info.Attr, 0777);
- inode->i_op = &exfat_file_inode_operations;
- inode->i_fop = &exfat_file_operations;
- inode->i_mapping->a_ops = &exfat_aops;
- inode->i_mapping->nrpages = 0;
-
- i_size_write(inode, info.Size);
- EXFAT_I(inode)->mmu_private = i_size_read(inode);
- }
- exfat_save_attr(inode, info.Attr);
-
- inode->i_blocks = ((i_size_read(inode) + (p_fs->cluster_size - 1))
- & ~((loff_t)p_fs->cluster_size - 1)) >> 9;
-
- exfat_time_fat2unix(&inode->i_mtime, &info.ModifyTimestamp);
- exfat_time_fat2unix(&inode->i_ctime, &info.CreateTimestamp);
- exfat_time_fat2unix(&inode->i_atime, &info.AccessTimestamp);
-
- return 0;
-}
-
-static struct inode *exfat_build_inode(struct super_block *sb,
- struct file_id_t *fid, loff_t i_pos)
-{
- struct inode *inode;
- int err;
-
- inode = exfat_iget(sb, i_pos);
- if (inode)
- goto out;
- inode = new_inode(sb);
- if (!inode) {
- inode = ERR_PTR(-ENOMEM);
- goto out;
- }
- inode->i_ino = iunique(sb, EXFAT_ROOT_INO);
- SET_IVERSION(inode, 1);
- err = exfat_fill_inode(inode, fid);
- if (err) {
- iput(inode);
- inode = ERR_PTR(err);
- goto out;
- }
- exfat_attach(inode, i_pos);
- insert_inode_hash(inode);
-out:
- return inode;
-}
-
-static int exfat_sync_inode(struct inode *inode)
-{
- return exfat_write_inode(inode, NULL);
-}
-
-static struct inode *exfat_alloc_inode(struct super_block *sb)
-{
- struct exfat_inode_info *ei;
-
- ei = kmem_cache_alloc(exfat_inode_cachep, GFP_NOFS);
- if (!ei)
- return NULL;
-
- init_rwsem(&ei->truncate_lock);
-
- return &ei->vfs_inode;
-}
-
-static void exfat_destroy_inode(struct inode *inode)
-{
- kfree(EXFAT_I(inode)->target);
- EXFAT_I(inode)->target = NULL;
-
- kmem_cache_free(exfat_inode_cachep, EXFAT_I(inode));
-}
-
-static int exfat_write_inode(struct inode *inode, struct writeback_control *wbc)
-{
- struct dir_entry_t info;
-
- if (inode->i_ino == EXFAT_ROOT_INO)
- return 0;
-
- info.Attr = exfat_make_attr(inode);
- info.Size = i_size_read(inode);
-
- exfat_time_unix2fat(&inode->i_mtime, &info.ModifyTimestamp);
- exfat_time_unix2fat(&inode->i_ctime, &info.CreateTimestamp);
- exfat_time_unix2fat(&inode->i_atime, &info.AccessTimestamp);
-
- ffsWriteStat(inode, &info);
-
- return 0;
-}
-
-static void exfat_evict_inode(struct inode *inode)
-{
- truncate_inode_pages(&inode->i_data, 0);
-
- if (!inode->i_nlink)
- i_size_write(inode, 0);
- invalidate_inode_buffers(inode);
- clear_inode(inode);
- exfat_detach(inode);
-
- remove_inode_hash(inode);
-}
-
-static void exfat_free_super(struct exfat_sb_info *sbi)
-{
- if (sbi->nls_disk)
- unload_nls(sbi->nls_disk);
- if (sbi->nls_io)
- unload_nls(sbi->nls_io);
- if (sbi->options.iocharset != exfat_default_iocharset)
- kfree(sbi->options.iocharset);
- /* mutex_init is in exfat_fill_super function. only for 3.7+ */
- mutex_destroy(&sbi->s_lock);
- kvfree(sbi);
-}
-
-static void exfat_put_super(struct super_block *sb)
-{
- struct exfat_sb_info *sbi = EXFAT_SB(sb);
-
- if (__is_sb_dirty(sb))
- exfat_write_super(sb);
-
- ffsUmountVol(sb);
-
- sb->s_fs_info = NULL;
- exfat_free_super(sbi);
-}
-
-static void exfat_write_super(struct super_block *sb)
-{
- __lock_super(sb);
-
- __set_sb_clean(sb);
-
- if (!sb_rdonly(sb))
- ffsSyncVol(sb, true);
-
- __unlock_super(sb);
-}
-
-static int exfat_sync_fs(struct super_block *sb, int wait)
-{
- int err = 0;
-
- if (__is_sb_dirty(sb)) {
- __lock_super(sb);
- __set_sb_clean(sb);
- err = ffsSyncVol(sb, true);
- __unlock_super(sb);
- }
-
- return err;
-}
-
-static int exfat_statfs(struct dentry *dentry, struct kstatfs *buf)
-{
- struct super_block *sb = dentry->d_sb;
- u64 id = huge_encode_dev(sb->s_bdev->bd_dev);
- struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
- struct vol_info_t info;
-
- if (p_fs->used_clusters == UINT_MAX) {
- if (ffsGetVolInfo(sb, &info) == -EIO)
- return -EIO;
-
- } else {
- info.FatType = p_fs->vol_type;
- info.ClusterSize = p_fs->cluster_size;
- info.NumClusters = p_fs->num_clusters - 2;
- info.UsedClusters = p_fs->used_clusters;
- info.FreeClusters = info.NumClusters - info.UsedClusters;
-
- if (p_fs->dev_ejected)
- pr_info("[EXFAT] statfs on device that is ejected\n");
- }
-
- buf->f_type = sb->s_magic;
- buf->f_bsize = info.ClusterSize;
- buf->f_blocks = info.NumClusters;
- buf->f_bfree = info.FreeClusters;
- buf->f_bavail = info.FreeClusters;
- buf->f_fsid.val[0] = (u32)id;
- buf->f_fsid.val[1] = (u32)(id >> 32);
- buf->f_namelen = 260;
-
- return 0;
-}
-
-static int exfat_remount(struct super_block *sb, int *flags, char *data)
-{
- *flags |= SB_NODIRATIME;
- return 0;
-}
-
-static int exfat_show_options(struct seq_file *m, struct dentry *root)
-{
- struct exfat_sb_info *sbi = EXFAT_SB(root->d_sb);
- struct exfat_mount_options *opts = &sbi->options;
-
- if (__kuid_val(opts->fs_uid))
- seq_printf(m, ",uid=%u", __kuid_val(opts->fs_uid));
- if (__kgid_val(opts->fs_gid))
- seq_printf(m, ",gid=%u", __kgid_val(opts->fs_gid));
- seq_printf(m, ",fmask=%04o", opts->fs_fmask);
- seq_printf(m, ",dmask=%04o", opts->fs_dmask);
- if (opts->allow_utime)
- seq_printf(m, ",allow_utime=%04o", opts->allow_utime);
- if (sbi->nls_disk)
- seq_printf(m, ",codepage=%s", sbi->nls_disk->charset);
- if (sbi->nls_io)
- seq_printf(m, ",iocharset=%s", sbi->nls_io->charset);
- seq_printf(m, ",namecase=%u", opts->casesensitive);
- if (opts->errors == EXFAT_ERRORS_CONT)
- seq_puts(m, ",errors=continue");
- else if (opts->errors == EXFAT_ERRORS_PANIC)
- seq_puts(m, ",errors=panic");
- else
- seq_puts(m, ",errors=remount-ro");
-#ifdef CONFIG_STAGING_EXFAT_DISCARD
- if (opts->discard)
- seq_puts(m, ",discard");
-#endif
- return 0;
-}
-
-static const struct super_operations exfat_sops = {
- .alloc_inode = exfat_alloc_inode,
- .destroy_inode = exfat_destroy_inode,
- .write_inode = exfat_write_inode,
- .evict_inode = exfat_evict_inode,
- .put_super = exfat_put_super,
- .sync_fs = exfat_sync_fs,
- .statfs = exfat_statfs,
- .remount_fs = exfat_remount,
- .show_options = exfat_show_options,
-};
-
-/*======================================================================*/
-/* Export Operations */
-/*======================================================================*/
-
-static struct inode *exfat_nfs_get_inode(struct super_block *sb, u64 ino,
- u32 generation)
-{
- struct inode *inode = NULL;
-
- if (ino < EXFAT_ROOT_INO)
- return inode;
- inode = ilookup(sb, ino);
-
- if (inode && generation && (inode->i_generation != generation)) {
- iput(inode);
- inode = NULL;
- }
-
- return inode;
-}
-
-static struct dentry *exfat_fh_to_dentry(struct super_block *sb,
- struct fid *fid, int fh_len,
- int fh_type)
-{
- return generic_fh_to_dentry(sb, fid, fh_len, fh_type,
- exfat_nfs_get_inode);
-}
-
-static struct dentry *exfat_fh_to_parent(struct super_block *sb,
- struct fid *fid, int fh_len,
- int fh_type)
-{
- return generic_fh_to_parent(sb, fid, fh_len, fh_type,
- exfat_nfs_get_inode);
-}
-
-static const struct export_operations exfat_export_ops = {
- .fh_to_dentry = exfat_fh_to_dentry,
- .fh_to_parent = exfat_fh_to_parent,
-};
-
-/*======================================================================*/
-/* Super Block Read Operations */
-/*======================================================================*/
-
-enum {
- Opt_uid,
- Opt_gid,
- Opt_umask,
- Opt_dmask,
- Opt_fmask,
- Opt_allow_utime,
- Opt_codepage,
- Opt_charset,
- Opt_namecase,
- Opt_debug,
- Opt_err_cont,
- Opt_err_panic,
- Opt_err_ro,
- Opt_utf8_hack,
- Opt_err,
-#ifdef CONFIG_STAGING_EXFAT_DISCARD
- Opt_discard,
-#endif /* EXFAT_CONFIG_DISCARD */
-};
-
-static const match_table_t exfat_tokens = {
- {Opt_uid, "uid=%u"},
- {Opt_gid, "gid=%u"},
- {Opt_umask, "umask=%o"},
- {Opt_dmask, "dmask=%o"},
- {Opt_fmask, "fmask=%o"},
- {Opt_allow_utime, "allow_utime=%o"},
- {Opt_codepage, "codepage=%u"},
- {Opt_charset, "iocharset=%s"},
- {Opt_namecase, "namecase=%u"},
- {Opt_debug, "debug"},
- {Opt_err_cont, "errors=continue"},
- {Opt_err_panic, "errors=panic"},
- {Opt_err_ro, "errors=remount-ro"},
- {Opt_utf8_hack, "utf8"},
-#ifdef CONFIG_STAGING_EXFAT_DISCARD
- {Opt_discard, "discard"},
-#endif /* CONFIG_STAGING_EXFAT_DISCARD */
- {Opt_err, NULL}
-};
-
-static int parse_options(char *options, int silent, int *debug,
- struct exfat_mount_options *opts)
-{
- char *p;
- substring_t args[MAX_OPT_ARGS];
- int option;
- char *iocharset;
-
- opts->fs_uid = current_uid();
- opts->fs_gid = current_gid();
- opts->fs_fmask = current->fs->umask;
- opts->fs_dmask = current->fs->umask;
- opts->allow_utime = U16_MAX;
- opts->codepage = exfat_default_codepage;
- opts->iocharset = exfat_default_iocharset;
- opts->casesensitive = 0;
- opts->errors = EXFAT_ERRORS_RO;
-#ifdef CONFIG_STAGING_EXFAT_DISCARD
- opts->discard = 0;
-#endif
- *debug = 0;
-
- if (!options)
- goto out;
-
- while ((p = strsep(&options, ","))) {
- int token;
-
- if (!*p)
- continue;
-
- token = match_token(p, exfat_tokens, args);
- switch (token) {
- case Opt_uid:
- if (match_int(&args[0], &option))
- return 0;
- opts->fs_uid = KUIDT_INIT(option);
- break;
- case Opt_gid:
- if (match_int(&args[0], &option))
- return 0;
- opts->fs_gid = KGIDT_INIT(option);
- break;
- case Opt_umask:
- case Opt_dmask:
- case Opt_fmask:
- if (match_octal(&args[0], &option))
- return 0;
- if (token != Opt_dmask)
- opts->fs_fmask = option;
- if (token != Opt_fmask)
- opts->fs_dmask = option;
- break;
- case Opt_allow_utime:
- if (match_octal(&args[0], &option))
- return 0;
- opts->allow_utime = option & 0022;
- break;
- case Opt_codepage:
- if (match_int(&args[0], &option))
- return 0;
- opts->codepage = option;
- break;
- case Opt_charset:
- if (opts->iocharset != exfat_default_iocharset)
- kfree(opts->iocharset);
- iocharset = match_strdup(&args[0]);
- if (!iocharset)
- return -ENOMEM;
- opts->iocharset = iocharset;
- break;
- case Opt_namecase:
- if (match_int(&args[0], &option))
- return 0;
- opts->casesensitive = option;
- break;
- case Opt_err_cont:
- opts->errors = EXFAT_ERRORS_CONT;
- break;
- case Opt_err_panic:
- opts->errors = EXFAT_ERRORS_PANIC;
- break;
- case Opt_err_ro:
- opts->errors = EXFAT_ERRORS_RO;
- break;
- case Opt_debug:
- *debug = 1;
- break;
-#ifdef CONFIG_STAGING_EXFAT_DISCARD
- case Opt_discard:
- opts->discard = 1;
- break;
-#endif /* CONFIG_STAGING_EXFAT_DISCARD */
- case Opt_utf8_hack:
- break;
- default:
- if (!silent)
- pr_err("[EXFAT] Unrecognized mount option %s or missing value\n",
- p);
- return -EINVAL;
- }
- }
-
-out:
- if (opts->allow_utime == U16_MAX)
- opts->allow_utime = ~opts->fs_dmask & 0022;
-
- return 0;
-}
-
-static void exfat_hash_init(struct super_block *sb)
-{
- struct exfat_sb_info *sbi = EXFAT_SB(sb);
- int i;
-
- spin_lock_init(&sbi->inode_hash_lock);
- for (i = 0; i < EXFAT_HASH_SIZE; i++)
- INIT_HLIST_HEAD(&sbi->inode_hashtable[i]);
-}
-
-static int exfat_read_root(struct inode *inode)
-{
- struct super_block *sb = inode->i_sb;
- struct exfat_sb_info *sbi = EXFAT_SB(sb);
- struct fs_info_t *p_fs = &sbi->fs_info;
- struct timespec64 curtime;
- struct dir_entry_t info;
-
- EXFAT_I(inode)->fid.dir.dir = p_fs->root_dir;
- EXFAT_I(inode)->fid.dir.flags = 0x01;
- EXFAT_I(inode)->fid.entry = -1;
- EXFAT_I(inode)->fid.start_clu = p_fs->root_dir;
- EXFAT_I(inode)->fid.flags = 0x01;
- EXFAT_I(inode)->fid.type = TYPE_DIR;
- EXFAT_I(inode)->fid.rwoffset = 0;
- EXFAT_I(inode)->fid.hint_last_off = -1;
-
- EXFAT_I(inode)->target = NULL;
-
- ffsReadStat(inode, &info);
-
- inode->i_uid = sbi->options.fs_uid;
- inode->i_gid = sbi->options.fs_gid;
- INC_IVERSION(inode);
- inode->i_generation = 0;
- inode->i_mode = exfat_make_mode(sbi, ATTR_SUBDIR, 0777);
- inode->i_op = &exfat_dir_inode_operations;
- inode->i_fop = &exfat_dir_operations;
-
- i_size_write(inode, info.Size);
- inode->i_blocks = ((i_size_read(inode) + (p_fs->cluster_size - 1))
- & ~((loff_t)p_fs->cluster_size - 1)) >> 9;
- EXFAT_I(inode)->i_pos = ((loff_t)p_fs->root_dir << 32) | 0xffffffff;
- EXFAT_I(inode)->mmu_private = i_size_read(inode);
-
- exfat_save_attr(inode, ATTR_SUBDIR);
- curtime = current_time(inode);
- inode->i_mtime = curtime;
- inode->i_atime = curtime;
- inode->i_ctime = curtime;
- set_nlink(inode, info.NumSubdirs + 2);
-
- return 0;
-}
-
-static void setup_dops(struct super_block *sb)
-{
- if (EXFAT_SB(sb)->options.casesensitive == 0)
- sb->s_d_op = &exfat_ci_dentry_ops;
- else
- sb->s_d_op = &exfat_dentry_ops;
-}
-
-static int exfat_fill_super(struct super_block *sb, void *data, int silent)
-{
- struct inode *root_inode = NULL;
- struct exfat_sb_info *sbi;
- int debug, ret;
- long error;
-
- /*
- * GFP_KERNEL is ok here, because while we do hold the
- * supeblock lock, memory pressure can't call back into
- * the filesystem, since we're only just about to mount
- * it and have no inodes etc active!
- */
- sbi = kvzalloc(sizeof(*sbi), GFP_KERNEL);
- if (!sbi)
- return -ENOMEM;
- mutex_init(&sbi->s_lock);
- sb->s_fs_info = sbi;
- sb->s_flags |= SB_NODIRATIME;
- sb->s_magic = EXFAT_SUPER_MAGIC;
- sb->s_op = &exfat_sops;
- sb->s_export_op = &exfat_export_ops;
-
- error = parse_options(data, silent, &debug, &sbi->options);
- if (error)
- goto out_fail;
-
- setup_dops(sb);
-
- error = -EIO;
- sb_min_blocksize(sb, 512);
- sb->s_maxbytes = 0x7fffffffffffffffLL; /* maximum file size */
-
- ret = ffsMountVol(sb);
- if (ret) {
- if (!silent)
- pr_err("[EXFAT] ffsMountVol failed\n");
-
- goto out_fail;
- }
-
- /* set up enough so that it can read an inode */
- exfat_hash_init(sb);
-
- /*
- * The low byte of FAT's first entry must have same value with
- * media-field. But in real world, too many devices is
- * writing wrong value. So, removed that validity check.
- *
- * if (FAT_FIRST_ENT(sb, media) != first)
- */
-
- sbi->nls_io = load_nls(sbi->options.iocharset);
-
- error = -ENOMEM;
- root_inode = new_inode(sb);
- if (!root_inode)
- goto out_fail2;
- root_inode->i_ino = EXFAT_ROOT_INO;
- SET_IVERSION(root_inode, 1);
-
- error = exfat_read_root(root_inode);
- if (error < 0)
- goto out_fail2;
- error = -ENOMEM;
- exfat_attach(root_inode, EXFAT_I(root_inode)->i_pos);
- insert_inode_hash(root_inode);
- sb->s_root = d_make_root(root_inode);
- if (!sb->s_root) {
- pr_err("[EXFAT] Getting the root inode failed\n");
- goto out_fail2;
- }
-
- return 0;
-
-out_fail2:
- ffsUmountVol(sb);
-out_fail:
- if (root_inode)
- iput(root_inode);
- sb->s_fs_info = NULL;
- exfat_free_super(sbi);
- return error;
-}
-
-static struct dentry *exfat_fs_mount(struct file_system_type *fs_type,
- int flags, const char *dev_name,
- void *data)
-{
- return mount_bdev(fs_type, flags, dev_name, data, exfat_fill_super);
-}
-
-static void init_once(void *foo)
-{
- struct exfat_inode_info *ei = (struct exfat_inode_info *)foo;
-
- INIT_HLIST_NODE(&ei->i_hash_fat);
- inode_init_once(&ei->vfs_inode);
-}
-
-static int __init exfat_init_inodecache(void)
-{
- exfat_inode_cachep = kmem_cache_create("exfat_inode_cache",
- sizeof(struct exfat_inode_info),
- 0,
- (SLAB_RECLAIM_ACCOUNT |
- SLAB_MEM_SPREAD),
- init_once);
- if (!exfat_inode_cachep)
- return -ENOMEM;
- return 0;
-}
-
-static void __exit exfat_destroy_inodecache(void)
-{
- /*
- * Make sure all delayed rcu free inodes are flushed before we
- * destroy cache.
- */
- rcu_barrier();
- kmem_cache_destroy(exfat_inode_cachep);
-}
-
-#ifdef CONFIG_STAGING_EXFAT_KERNEL_DEBUG
-static void exfat_debug_kill_sb(struct super_block *sb)
-{
- struct exfat_sb_info *sbi = EXFAT_SB(sb);
- struct block_device *bdev = sb->s_bdev;
- struct fs_info_t *p_fs = &(EXFAT_SB(sb)->fs_info);
-
- long flags;
-
- if (sbi) {
- flags = sbi->debug_flags;
-
- if (flags & EXFAT_DEBUGFLAGS_INVALID_UMOUNT) {
- /*
- * invalidate_bdev drops all device cache include
- * dirty. We use this to simulate device removal.
- */
- mutex_lock(&p_fs->v_mutex);
- exfat_fat_release_all(sb);
- exfat_buf_release_all(sb);
- mutex_unlock(&p_fs->v_mutex);
-
- invalidate_bdev(bdev);
- }
- }
-
- kill_block_super(sb);
-}
-#endif /* CONFIG_STAGING_EXFAT_KERNEL_DEBUG */
-
-static struct file_system_type exfat_fs_type = {
- .owner = THIS_MODULE,
- .name = "exfat",
- .mount = exfat_fs_mount,
-#ifdef CONFIG_STAGING_EXFAT_KERNEL_DEBUG
- .kill_sb = exfat_debug_kill_sb,
-#else
- .kill_sb = kill_block_super,
-#endif /* CONFIG_STAGING_EXFAT_KERNEL_DEBUG */
- .fs_flags = FS_REQUIRES_DEV,
-};
-
-static int __init init_exfat(void)
-{
- int err;
-
- BUILD_BUG_ON(sizeof(struct dentry_t) != DENTRY_SIZE);
- BUILD_BUG_ON(sizeof(struct dos_dentry_t) != DENTRY_SIZE);
- BUILD_BUG_ON(sizeof(struct ext_dentry_t) != DENTRY_SIZE);
- BUILD_BUG_ON(sizeof(struct file_dentry_t) != DENTRY_SIZE);
- BUILD_BUG_ON(sizeof(struct strm_dentry_t) != DENTRY_SIZE);
- BUILD_BUG_ON(sizeof(struct name_dentry_t) != DENTRY_SIZE);
- BUILD_BUG_ON(sizeof(struct bmap_dentry_t) != DENTRY_SIZE);
- BUILD_BUG_ON(sizeof(struct case_dentry_t) != DENTRY_SIZE);
- BUILD_BUG_ON(sizeof(struct volm_dentry_t) != DENTRY_SIZE);
-
- pr_info("exFAT: Version %s\n", EXFAT_VERSION);
-
- err = exfat_init_inodecache();
- if (err)
- return err;
-
- err = register_filesystem(&exfat_fs_type);
- if (err)
- return err;
-
- return 0;
-}
-
-static void __exit exit_exfat(void)
-{
- exfat_destroy_inodecache();
- unregister_filesystem(&exfat_fs_type);
-}
-
-module_init(init_exfat);
-module_exit(exit_exfat);
-
-MODULE_LICENSE("GPL");
-MODULE_DESCRIPTION("exFAT Filesystem Driver");
-MODULE_ALIAS_FS("exfat");
diff -Nurp linux-5.6.3.orig/drivers/staging/exfat/exfat_upcase.c linux-5.6.3/drivers/staging/exfat/exfat_upcase.c
--- linux-5.6.3.orig/drivers/staging/exfat/exfat_upcase.c 2020-03-30 01:25:41.000000000 +0300
+++ linux-5.6.3/drivers/staging/exfat/exfat_upcase.c 1970-01-01 02:00:00.000000000 +0200
@@ -1,740 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * Copyright (C) 2012-2013 Samsung Electronics Co., Ltd.
- */
-
-#include <linux/types.h>
-#include "exfat.h"
-
-const u8 uni_upcase[NUM_UPCASE << 1] = {
- 0x00, 0x00, 0x01, 0x00, 0x02, 0x00, 0x03, 0x00,
- 0x04, 0x00, 0x05, 0x00, 0x06, 0x00, 0x07, 0x00,
- 0x08, 0x00, 0x09, 0x00, 0x0A, 0x00, 0x0B, 0x00,
- 0x0C, 0x00, 0x0D, 0x00, 0x0E, 0x00, 0x0F, 0x00,
- 0x10, 0x00, 0x11, 0x00, 0x12, 0x00, 0x13, 0x00,
- 0x14, 0x00, 0x15, 0x00, 0x16, 0x00, 0x17, 0x00,
- 0x18, 0x00, 0x19, 0x00, 0x1A, 0x00, 0x1B, 0x00,
- 0x1C, 0x00, 0x1D, 0x00, 0x1E, 0x00, 0x1F, 0x00,
- 0x20, 0x00, 0x21, 0x00, 0x22, 0x00, 0x23, 0x00,
- 0x24, 0x00, 0x25, 0x00, 0x26, 0x00, 0x27, 0x00,
- 0x28, 0x00, 0x29, 0x00, 0x2A, 0x00, 0x2B, 0x00,
- 0x2C, 0x00, 0x2D, 0x00, 0x2E, 0x00, 0x2F, 0x00,
- 0x30, 0x00, 0x31, 0x00, 0x32, 0x00, 0x33, 0x00,
- 0x34, 0x00, 0x35, 0x00, 0x36, 0x00, 0x37, 0x00,
- 0x38, 0x00, 0x39, 0x00, 0x3A, 0x00, 0x3B, 0x00,
- 0x3C, 0x00, 0x3D, 0x00, 0x3E, 0x00, 0x3F, 0x00,
- 0x40, 0x00, 0x41, 0x00, 0x42, 0x00, 0x43, 0x00,
- 0x44, 0x00, 0x45, 0x00, 0x46, 0x00, 0x47, 0x00,
- 0x48, 0x00, 0x49, 0x00, 0x4A, 0x00, 0x4B, 0x00,
- 0x4C, 0x00, 0x4D, 0x00, 0x4E, 0x00, 0x4F, 0x00,
- 0x50, 0x00, 0x51, 0x00, 0x52, 0x00, 0x53, 0x00,
- 0x54, 0x00, 0x55, 0x00, 0x56, 0x00, 0x57, 0x00,
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- 0xFD, 0x2C, 0xFE, 0x2C, 0xFF, 0x2C, 0xA0, 0x10,
- 0xA1, 0x10, 0xA2, 0x10, 0xA3, 0x10, 0xA4, 0x10,
- 0xA5, 0x10, 0xA6, 0x10, 0xA7, 0x10, 0xA8, 0x10,
- 0xA9, 0x10, 0xAA, 0x10, 0xAB, 0x10, 0xAC, 0x10,
- 0xAD, 0x10, 0xAE, 0x10, 0xAF, 0x10, 0xB0, 0x10,
- 0xB1, 0x10, 0xB2, 0x10, 0xB3, 0x10, 0xB4, 0x10,
- 0xB5, 0x10, 0xB6, 0x10, 0xB7, 0x10, 0xB8, 0x10,
- 0xB9, 0x10, 0xBA, 0x10, 0xBB, 0x10, 0xBC, 0x10,
- 0xBD, 0x10, 0xBE, 0x10, 0xBF, 0x10, 0xC0, 0x10,
- 0xC1, 0x10, 0xC2, 0x10, 0xC3, 0x10, 0xC4, 0x10,
- 0xC5, 0x10, 0xFF, 0xFF, 0x1B, 0xD2, 0x21, 0xFF,
- 0x22, 0xFF, 0x23, 0xFF, 0x24, 0xFF, 0x25, 0xFF,
- 0x26, 0xFF, 0x27, 0xFF, 0x28, 0xFF, 0x29, 0xFF,
- 0x2A, 0xFF, 0x2B, 0xFF, 0x2C, 0xFF, 0x2D, 0xFF,
- 0x2E, 0xFF, 0x2F, 0xFF, 0x30, 0xFF, 0x31, 0xFF,
- 0x32, 0xFF, 0x33, 0xFF, 0x34, 0xFF, 0x35, 0xFF,
- 0x36, 0xFF, 0x37, 0xFF, 0x38, 0xFF, 0x39, 0xFF,
- 0x3A, 0xFF, 0x5B, 0xFF, 0x5C, 0xFF, 0x5D, 0xFF,
- 0x5E, 0xFF, 0x5F, 0xFF, 0x60, 0xFF, 0x61, 0xFF,
- 0x62, 0xFF, 0x63, 0xFF, 0x64, 0xFF, 0x65, 0xFF,
- 0x66, 0xFF, 0x67, 0xFF, 0x68, 0xFF, 0x69, 0xFF,
- 0x6A, 0xFF, 0x6B, 0xFF, 0x6C, 0xFF, 0x6D, 0xFF,
- 0x6E, 0xFF, 0x6F, 0xFF, 0x70, 0xFF, 0x71, 0xFF,
- 0x72, 0xFF, 0x73, 0xFF, 0x74, 0xFF, 0x75, 0xFF,
- 0x76, 0xFF, 0x77, 0xFF, 0x78, 0xFF, 0x79, 0xFF,
- 0x7A, 0xFF, 0x7B, 0xFF, 0x7C, 0xFF, 0x7D, 0xFF,
- 0x7E, 0xFF, 0x7F, 0xFF, 0x80, 0xFF, 0x81, 0xFF,
- 0x82, 0xFF, 0x83, 0xFF, 0x84, 0xFF, 0x85, 0xFF,
- 0x86, 0xFF, 0x87, 0xFF, 0x88, 0xFF, 0x89, 0xFF,
- 0x8A, 0xFF, 0x8B, 0xFF, 0x8C, 0xFF, 0x8D, 0xFF,
- 0x8E, 0xFF, 0x8F, 0xFF, 0x90, 0xFF, 0x91, 0xFF,
- 0x92, 0xFF, 0x93, 0xFF, 0x94, 0xFF, 0x95, 0xFF,
- 0x96, 0xFF, 0x97, 0xFF, 0x98, 0xFF, 0x99, 0xFF,
- 0x9A, 0xFF, 0x9B, 0xFF, 0x9C, 0xFF, 0x9D, 0xFF,
- 0x9E, 0xFF, 0x9F, 0xFF, 0xA0, 0xFF, 0xA1, 0xFF,
- 0xA2, 0xFF, 0xA3, 0xFF, 0xA4, 0xFF, 0xA5, 0xFF,
- 0xA6, 0xFF, 0xA7, 0xFF, 0xA8, 0xFF, 0xA9, 0xFF,
- 0xAA, 0xFF, 0xAB, 0xFF, 0xAC, 0xFF, 0xAD, 0xFF,
- 0xAE, 0xFF, 0xAF, 0xFF, 0xB0, 0xFF, 0xB1, 0xFF,
- 0xB2, 0xFF, 0xB3, 0xFF, 0xB4, 0xFF, 0xB5, 0xFF,
- 0xB6, 0xFF, 0xB7, 0xFF, 0xB8, 0xFF, 0xB9, 0xFF,
- 0xBA, 0xFF, 0xBB, 0xFF, 0xBC, 0xFF, 0xBD, 0xFF,
- 0xBE, 0xFF, 0xBF, 0xFF, 0xC0, 0xFF, 0xC1, 0xFF,
- 0xC2, 0xFF, 0xC3, 0xFF, 0xC4, 0xFF, 0xC5, 0xFF,
- 0xC6, 0xFF, 0xC7, 0xFF, 0xC8, 0xFF, 0xC9, 0xFF,
- 0xCA, 0xFF, 0xCB, 0xFF, 0xCC, 0xFF, 0xCD, 0xFF,
- 0xCE, 0xFF, 0xCF, 0xFF, 0xD0, 0xFF, 0xD1, 0xFF,
- 0xD2, 0xFF, 0xD3, 0xFF, 0xD4, 0xFF, 0xD5, 0xFF,
- 0xD6, 0xFF, 0xD7, 0xFF, 0xD8, 0xFF, 0xD9, 0xFF,
- 0xDA, 0xFF, 0xDB, 0xFF, 0xDC, 0xFF, 0xDD, 0xFF,
- 0xDE, 0xFF, 0xDF, 0xFF, 0xE0, 0xFF, 0xE1, 0xFF,
- 0xE2, 0xFF, 0xE3, 0xFF, 0xE4, 0xFF, 0xE5, 0xFF,
- 0xE6, 0xFF, 0xE7, 0xFF, 0xE8, 0xFF, 0xE9, 0xFF,
- 0xEA, 0xFF, 0xEB, 0xFF, 0xEC, 0xFF, 0xED, 0xFF,
- 0xEE, 0xFF, 0xEF, 0xFF, 0xF0, 0xFF, 0xF1, 0xFF,
- 0xF2, 0xFF, 0xF3, 0xFF, 0xF4, 0xFF, 0xF5, 0xFF,
- 0xF6, 0xFF, 0xF7, 0xFF, 0xF8, 0xFF, 0xF9, 0xFF,
- 0xFA, 0xFF, 0xFB, 0xFF, 0xFC, 0xFF, 0xFD, 0xFF,
- 0xFE, 0xFF, 0xFF, 0xFF
-};
diff -Nurp linux-5.6.3.orig/drivers/staging/exfat/Kconfig linux-5.6.3/drivers/staging/exfat/Kconfig
--- linux-5.6.3.orig/drivers/staging/exfat/Kconfig 2020-03-30 01:25:41.000000000 +0300
+++ linux-5.6.3/drivers/staging/exfat/Kconfig 1970-01-01 02:00:00.000000000 +0200
@@ -1,41 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0
-config STAGING_EXFAT_FS
- tristate "exFAT fs support"
- depends on BLOCK
- select NLS
- help
- This adds support for the exFAT file system.
-
-config STAGING_EXFAT_DISCARD
- bool "enable discard support"
- depends on STAGING_EXFAT_FS
- default y
-
-config STAGING_EXFAT_DELAYED_SYNC
- bool "enable delayed sync"
- depends on STAGING_EXFAT_FS
- default n
-
-config STAGING_EXFAT_KERNEL_DEBUG
- bool "enable kernel debug features via ioctl"
- depends on STAGING_EXFAT_FS
- default n
-
-config STAGING_EXFAT_DEBUG_MSG
- bool "print debug messages"
- depends on STAGING_EXFAT_FS
- default n
-
-config STAGING_EXFAT_DEFAULT_CODEPAGE
- int "Default codepage for exFAT"
- default 437
- depends on STAGING_EXFAT_FS
- help
- This option should be set to the codepage of your exFAT filesystems.
-
-config STAGING_EXFAT_DEFAULT_IOCHARSET
- string "Default iocharset for exFAT"
- default "utf8"
- depends on STAGING_EXFAT_FS
- help
- Set this to the default input/output character set you'd like exFAT to use.
diff -Nurp linux-5.6.3.orig/drivers/staging/exfat/Makefile linux-5.6.3/drivers/staging/exfat/Makefile
--- linux-5.6.3.orig/drivers/staging/exfat/Makefile 2020-03-30 01:25:41.000000000 +0300
+++ linux-5.6.3/drivers/staging/exfat/Makefile 1970-01-01 02:00:00.000000000 +0200
@@ -1,10 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0-or-later
-
-obj-$(CONFIG_STAGING_EXFAT_FS) += exfat.o
-
-exfat-y := exfat_core.o \
- exfat_super.o \
- exfat_blkdev.o \
- exfat_cache.o \
- exfat_nls.o \
- exfat_upcase.o
diff -Nurp linux-5.6.3.orig/drivers/staging/exfat/TODO linux-5.6.3/drivers/staging/exfat/TODO
--- linux-5.6.3.orig/drivers/staging/exfat/TODO 2020-03-30 01:25:41.000000000 +0300
+++ linux-5.6.3/drivers/staging/exfat/TODO 1970-01-01 02:00:00.000000000 +0200
@@ -1,69 +0,0 @@
-A laundry list of things that need looking at, most of which will
-require more work than the average checkpatch cleanup...
-
-Note that some of these entries may not be bugs - they're things
-that need to be looked at, and *possibly* fixed.
-
-Clean up the ffsCamelCase function names.
-
-Fix (thing)->flags to not use magic numbers - multiple offenders
-
-Sort out all the s32/u32/u8 nonsense - most of these should be plain int.
-
-exfat_core.c - ffsReadFile - the goto err_out seem to leak a brelse().
-same for ffsWriteFile.
-
-All the calls to fs_sync() need to be looked at, particularly in the
-context of EXFAT_DELAYED_SYNC. Currently, if that's defined, we only
-flush to disk when sync() gets called. We should be doing at least
-metadata flushes at appropriate times.
-
-ffsTruncateFile - if (old_size <= new_size) {
-That doesn't look right. How did it ever work? Are they relying on lazy
-block allocation when actual writes happen? If nothing else, it never
-does the 'fid->size = new_size' and do the inode update....
-
-ffsSetAttr() is just dangling in the breeze, not wired up at all...
-
-Convert global mutexes to a per-superblock mutex.
-
-Right now, we load exactly one UTF-8 table. Check to see
-if that plays nice with different codepage and iocharset values
-for simultanous mounts of different devices
-
-exfat_rmdir() checks for -EBUSY but ffsRemoveDir() doesn't return it.
-In fact, there's a complete lack of -EBUSY testing anywhere.
-
-There's probably a few missing checks for -EEXIST
-
-check return codes of sync_dirty_buffer()
-
-Why is remove_file doing a num_entries++??
-
-Double check a lot of can't-happen parameter checks (for null pointers for
-things that have only one call site and can't pass a null, etc).
-
-All the DEBUG stuff can probably be tossed, including the ioctl(). Either
-that, or convert to a proper fault-injection system.
-
-exfat_remount does exactly one thing. Fix to actually deal with remount
-options, particularly handling R/O correctly. For that matter, allow
-R/O mounts in the first place.
-
-Figure out why the VFAT code used multi_sector_(read|write) but the
-exfat code doesn't use it. The difference matters on SSDs with wear leveling.
-
-exfat_fat_sync(), exfat_buf_sync(), and sync_alloc_bitmap()
-aren't called anyplace....
-
-Create helper function for exfat_set_entry_time() and exfat_set_entry_type()
-because it's sort of ugly to be calling the same functionn directly and
-other code calling through the fs_func struc ponters...
-
-clean up the remaining vol_type checks, which are of two types:
-some are ?: operators with magic numbers, and the rest are places
-where we're doing stuff with '.' and '..'.
-
-Patches to:
- Greg Kroah-Hartman <gregkh@linuxfoundation.org>
- Valdis Kletnieks <valdis.kletnieks@vt.edu>
diff -Nurp linux-5.6.3.orig/drivers/staging/Kconfig linux-5.6.3/drivers/staging/Kconfig
--- linux-5.6.3.orig/drivers/staging/Kconfig 2020-03-30 01:25:41.000000000 +0300
+++ linux-5.6.3/drivers/staging/Kconfig 2020-04-10 13:23:50.104394573 +0300
@@ -115,8 +115,6 @@ source "drivers/staging/kpc2000/Kconfig"
source "drivers/staging/wusbcore/Kconfig"
source "drivers/staging/uwb/Kconfig"
-source "drivers/staging/exfat/Kconfig"
-
source "drivers/staging/qlge/Kconfig"
source "drivers/staging/hp/Kconfig"
diff -Nurp linux-5.6.3.orig/drivers/staging/Makefile linux-5.6.3/drivers/staging/Makefile
--- linux-5.6.3.orig/drivers/staging/Makefile 2020-03-30 01:25:41.000000000 +0300
+++ linux-5.6.3/drivers/staging/Makefile 2020-04-10 13:23:55.703656045 +0300
@@ -48,7 +48,6 @@ obj-$(CONFIG_FIELDBUS_DEV) += fieldb
obj-$(CONFIG_KPC2000) += kpc2000/
obj-$(CONFIG_UWB) += uwb/
obj-$(CONFIG_USB_WUSB) += wusbcore/
-obj-$(CONFIG_STAGING_EXFAT_FS) += exfat/
obj-$(CONFIG_QLGE) += qlge/
obj-$(CONFIG_NET_VENDOR_HP) += hp/
obj-$(CONFIG_WFX) += wfx/
diff -Nurp linux-5.6.3.orig/MAINTAINERS linux-5.6.3/MAINTAINERS
--- linux-5.6.3.orig/MAINTAINERS 2020-03-30 01:25:41.000000000 +0300
+++ linux-5.6.3/MAINTAINERS 2020-04-10 13:23:25.806260135 +0300
@@ -6304,12 +6304,6 @@ F: include/trace/events/mdio.h
F: include/uapi/linux/mdio.h
F: include/uapi/linux/mii.h
-EXFAT FILE SYSTEM
-M: Valdis Kletnieks <valdis.kletnieks@vt.edu>
-L: linux-fsdevel@vger.kernel.org
-S: Maintained
-F: drivers/staging/exfat/
-
EXT2 FILE SYSTEM
M: Jan Kara <jack@suse.com>
L: linux-ext4@vger.kernel.org
