On Mon, 7 Nov 2011 16:11:24 +0300
Pavel Shilovsky <piastry@xxxxxxxxxxx> wrote:
> Signed-off-by: Pavel Shilovsky <piastry@xxxxxxxxxxx>
> ---
> fs/cifs/file.c | 26 ++++++++++++++++++++++++++
> 1 files changed, 26 insertions(+), 0 deletions(-)
>
> diff --git a/fs/cifs/file.c b/fs/cifs/file.c
> index cf0b153..4dd9283 100644
> --- a/fs/cifs/file.c
> +++ b/fs/cifs/file.c
> @@ -702,6 +702,13 @@ cifs_find_lock_conflict(struct cifsInodeInfo *cinode, struct cifsLockInfo *lock,
> lock->type, lock->netfid, conf_lock);
> }
>
> +/*
> + * Check if there is another lock that prevents us to set the lock (mandatory
> + * style). If such a lock exists, update the flock structure with its
> + * properties. Otherwise, set the flock type to F_UNLCK if we can cache brlocks
> + * or leave it the same if we can't. Returns 0 if we don't need to request to
> + * the server or 1 otherwise.
> + */
> static int
> cifs_lock_test(struct cifsInodeInfo *cinode, __u64 offset, __u64 length,
> __u8 type, __u16 netfid, struct file_lock *flock)
> @@ -739,6 +746,12 @@ cifs_lock_add(struct cifsInodeInfo *cinode, struct cifsLockInfo *lock)
> mutex_unlock(&cinode->lock_mutex);
> }
>
> +/*
> + * Set the byte-range lock (mandatory style). Returns:
> + * 1) 0, if we set the lock and don't need to request to the server;
> + * 2) 1, if no locks prevent us but we need to request to the server;
> + * 3) -EACCESS, if there is a lock that prevents us and wait is false.
> + */
> static int
> cifs_lock_add_if(struct cifsInodeInfo *cinode, struct cifsLockInfo *lock,
> bool wait)
> @@ -778,6 +791,13 @@ try_again:
> return rc;
> }
>
> +/*
> + * Check if there is another lock that prevents us to set the lock (posix
> + * style). If such a lock exists, update the flock structure with its
> + * properties. Otherwise, set the flock type to F_UNLCK if we can cache brlocks
> + * or leave it the same if we can't. Returns 0 if we don't need to request to
> + * the server or 1 otherwise.
> + */
> static int
> cifs_posix_lock_test(struct file *file, struct file_lock *flock)
> {
> @@ -800,6 +820,12 @@ cifs_posix_lock_test(struct file *file, struct file_lock *flock)
> return rc;
> }
>
> +/*
> + * Set the byte-range lock (posix style). Returns:
> + * 1) 0, if we set the lock and don't need to request to the server;
> + * 2) 1, if we need to request to the server;
> + * 3) <0, if the error occurs while setting the lock.
> + */
> static int
> cifs_posix_lock_set(struct file *file, struct file_lock *flock)
> {
Thanks for doing that.
Acked-by: Jeff Layton <jlayton@xxxxxxxxx>
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