diff options
Diffstat (limited to 'fs/ocfs2/dlmglue.c')
| -rw-r--r-- | fs/ocfs2/dlmglue.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/fs/ocfs2/dlmglue.c b/fs/ocfs2/dlmglue.c index f5643e3ff317..13fa809f4885 100644 --- a/fs/ocfs2/dlmglue.c +++ b/fs/ocfs2/dlmglue.c @@ -1764,6 +1764,27 @@ int ocfs2_rw_lock(struct inode *inode, int write) return status; } +int ocfs2_try_rw_lock(struct inode *inode, int write) +{ + int status, level; + struct ocfs2_lock_res *lockres; + struct ocfs2_super *osb = OCFS2_SB(inode->i_sb); + + mlog(0, "inode %llu try to take %s RW lock\n", + (unsigned long long)OCFS2_I(inode)->ip_blkno, + write ? "EXMODE" : "PRMODE"); + + if (ocfs2_mount_local(osb)) + return 0; + + lockres = &OCFS2_I(inode)->ip_rw_lockres; + + level = write ? DLM_LOCK_EX : DLM_LOCK_PR; + + status = ocfs2_cluster_lock(osb, lockres, level, DLM_LKF_NOQUEUE, 0); + return status; +} + void ocfs2_rw_unlock(struct inode *inode, int write) { int level = write ? DLM_LOCK_EX : DLM_LOCK_PR; |