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>lock_may_write</SPAN
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>Name</H2
>lock_may_write -- checks that the region is free of locks
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><CODE
><CODE
CLASS="FUNCDEF"
>int <TT
CLASS="FUNCTION"
>lock_may_write </TT
></CODE
>(struct inode * <TT
CLASS="PARAMETER"
><I
>inode</I
></TT
>, loff_t <TT
CLASS="PARAMETER"
><I
>start</I
></TT
>, unsigned long <TT
CLASS="PARAMETER"
><I
>len</I
></TT
>);</CODE
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>Arguments</H2
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><DT
><TT
CLASS="PARAMETER"
><I
>inode</I
></TT
></DT
><DD
><P
> the inode that is being written
</P
></DD
><DT
><TT
CLASS="PARAMETER"
><I
>start</I
></TT
></DT
><DD
><P
> the first byte to write
</P
></DD
><DT
><TT
CLASS="PARAMETER"
><I
>len</I
></TT
></DT
><DD
><P
> the number of bytes to write
</P
></DD
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><H2
>Description</H2
><P
> Emulates Windows locking requirements. Whole-file
mandatory locks (share modes) can prohibit a write and
byte-range POSIX locks can prohibit a write if they overlap.
</P
><P
> N.B. this function is only ever called
from knfsd and ownership of locks is never checked.
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