cifs: add support for flock

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The flock system call locks the whole file rather than a byte
range and so is currently emulated by various other file systems
by simply sending a byte range lock for the whole file.
Add flock handling for cifs.ko in similar way.

xfstest generic/504 passes with this as well

Signed-off-by: Steve French <stfrench@microsoft.com>
Reviewed-by: Pavel Shilovsky <pshilov@microsoft.com>
Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com>

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This commit is contained in:

Steve French 2019-07-16 18:55:38 -05:00

parent be1bf978e5

commit d0677992d2

3 changed files with 55 additions and 1 deletions

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3

fs/cifs/cifsfs.c

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1

fs/cifs/cifsfs.h

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52

fs/cifs/file.c

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