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| author | Pavel Shilovsky <piastry@etersoft.ru> | 2012-11-22 17:07:16 +0400 |
|---|---|---|
| committer | Steve French <smfrench@gmail.com> | 2012-12-05 13:27:29 -0600 |
| commit | b8db928b765b4b0fe1aec3eb7f1741fedbed9a33 (patch) | |
| tree | d2a9a40b73af32f7d5be942eea8f716b904c5eae /fs/cifs/file.c | |
| parent | 9ec3c882879d3777914d34c0143c7d5b87dbb5ea (diff) | |
| download | op-kernel-dev-b8db928b765b4b0fe1aec3eb7f1741fedbed9a33.zip op-kernel-dev-b8db928b765b4b0fe1aec3eb7f1741fedbed9a33.tar.gz | |
CIFS: Separate pushing mandatory locks and lock_sem handling
Reviewed-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Pavel Shilovsky <piastry@etersoft.ru>
Signed-off-by: Steve French <smfrench@gmail.com>
Diffstat (limited to 'fs/cifs/file.c')
| -rw-r--r-- | fs/cifs/file.c | 39 |
1 files changed, 10 insertions, 29 deletions
diff --git a/fs/cifs/file.c b/fs/cifs/file.c index 5fbbf99e..1747cbf 100644 --- a/fs/cifs/file.c +++ b/fs/cifs/file.c @@ -948,7 +948,6 @@ cifs_push_mandatory_locks(struct cifsFileInfo *cfile) int rc = 0, stored_rc; struct cifsLockInfo *li, *tmp; struct cifs_tcon *tcon; - struct cifsInodeInfo *cinode = CIFS_I(cfile->dentry->d_inode); unsigned int num, max_num, max_buf; LOCKING_ANDX_RANGE *buf, *cur; int types[] = {LOCKING_ANDX_LARGE_FILES, @@ -958,21 +957,12 @@ cifs_push_mandatory_locks(struct cifsFileInfo *cfile) xid = get_xid(); tcon = tlink_tcon(cfile->tlink); - /* we are going to update can_cache_brlcks here - need a write access */ - down_write(&cinode->lock_sem); - if (!cinode->can_cache_brlcks) { - up_write(&cinode->lock_sem); - free_xid(xid); - return rc; - } - /* * Accessing maxBuf is racy with cifs_reconnect - need to store value * and check it for zero before using. */ max_buf = tcon->ses->server->maxBuf; if (!max_buf) { - up_write(&cinode->lock_sem); free_xid(xid); return -EINVAL; } @@ -981,7 +971,6 @@ cifs_push_mandatory_locks(struct cifsFileInfo *cfile) sizeof(LOCKING_ANDX_RANGE); buf = kzalloc(max_num * sizeof(LOCKING_ANDX_RANGE), GFP_KERNEL); if (!buf) { - up_write(&cinode->lock_sem); free_xid(xid); return -ENOMEM; } @@ -1018,9 +1007,6 @@ cifs_push_mandatory_locks(struct cifsFileInfo *cfile) } } - cinode->can_cache_brlcks = false; - up_write(&cinode->lock_sem); - kfree(buf); free_xid(xid); return rc; @@ -1041,7 +1027,7 @@ struct lock_to_push { }; static int -cifs_push_posix_locks_locked(struct cifsFileInfo *cfile) +cifs_push_posix_locks(struct cifsFileInfo *cfile) { struct cifs_tcon *tcon = tlink_tcon(cfile->tlink); struct file_lock *flock, **before; @@ -1129,9 +1115,11 @@ err_out: } static int -cifs_push_posix_locks(struct cifsFileInfo *cfile) +cifs_push_locks(struct cifsFileInfo *cfile) { + struct cifs_sb_info *cifs_sb = CIFS_SB(cfile->dentry->d_sb); struct cifsInodeInfo *cinode = CIFS_I(cfile->dentry->d_inode); + struct cifs_tcon *tcon = tlink_tcon(cfile->tlink); int rc = 0; /* we are going to update can_cache_brlcks here - need a write access */ @@ -1140,24 +1128,17 @@ cifs_push_posix_locks(struct cifsFileInfo *cfile) up_write(&cinode->lock_sem); return rc; } - rc = cifs_push_posix_locks_locked(cfile); - cinode->can_cache_brlcks = false; - up_write(&cinode->lock_sem); - return rc; -} - -static int -cifs_push_locks(struct cifsFileInfo *cfile) -{ - struct cifs_sb_info *cifs_sb = CIFS_SB(cfile->dentry->d_sb); - struct cifs_tcon *tcon = tlink_tcon(cfile->tlink); if (cap_unix(tcon->ses) && (CIFS_UNIX_FCNTL_CAP & le64_to_cpu(tcon->fsUnixInfo.Capability)) && ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOPOSIXBRL) == 0)) - return cifs_push_posix_locks(cfile); + rc = cifs_push_posix_locks(cfile); + else + rc = tcon->ses->server->ops->push_mand_locks(cfile); - return tcon->ses->server->ops->push_mand_locks(cfile); + cinode->can_cache_brlcks = false; + up_write(&cinode->lock_sem); + return rc; } static void |
