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| author | Sage Weil <sage@newdream.net> | 2011-05-25 14:56:12 -0700 |
|---|---|---|
| committer | Sage Weil <sage@newdream.net> | 2011-06-07 21:36:45 -0700 |
| commit | 0c1f91f27140cf3b6e38dc4e892adac241c73a20 (patch) | |
| tree | 5058e4c66a16e2c1d808ce66317ef2c9fdb21590 /fs | |
| parent | 0e98728fa32d338907631349a8cc2afa07c0cb9a (diff) | |
| download | linux-0c1f91f27140cf3b6e38dc4e892adac241c73a20.tar.gz linux-0c1f91f27140cf3b6e38dc4e892adac241c73a20.tar.bz2 linux-0c1f91f27140cf3b6e38dc4e892adac241c73a20.zip | |
ceph: unwind canceled flock state
If we request a lock and then abort (e.g., ^C), we need to send a matching
unlock request to the MDS to unwind our lock attempt to avoid indefinitely
blocking other clients.
Reported-by: Brian Chrisman <brchrisman@gmail.com>
Signed-off-by: Sage Weil <sage@newdream.net>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/ceph/locks.c | 26 |
1 files changed, 16 insertions, 10 deletions
diff --git a/fs/ceph/locks.c b/fs/ceph/locks.c index 7f0f72c53f7e..80576d05d687 100644 --- a/fs/ceph/locks.c +++ b/fs/ceph/locks.c @@ -33,11 +33,10 @@ static int ceph_lock_message(u8 lock_type, u16 operation, struct file *file, length = fl->fl_end - fl->fl_start + 1; dout("ceph_lock_message: rule: %d, op: %d, pid: %llu, start: %llu, " - "length: %llu, wait: %d, type`: %d", (int)lock_type, + "length: %llu, wait: %d, type: %d", (int)lock_type, (int)operation, (u64)fl->fl_pid, fl->fl_start, length, wait, fl->fl_type); - req->r_args.filelock_change.rule = lock_type; req->r_args.filelock_change.type = cmd; req->r_args.filelock_change.pid = cpu_to_le64((u64)fl->fl_pid); @@ -71,7 +70,7 @@ static int ceph_lock_message(u8 lock_type, u16 operation, struct file *file, } ceph_mdsc_put_request(req); dout("ceph_lock_message: rule: %d, op: %d, pid: %llu, start: %llu, " - "length: %llu, wait: %d, type`: %d, err code %d", (int)lock_type, + "length: %llu, wait: %d, type: %d, err code %d", (int)lock_type, (int)operation, (u64)fl->fl_pid, fl->fl_start, length, wait, fl->fl_type, err); return err; @@ -110,16 +109,20 @@ int ceph_lock(struct file *file, int cmd, struct file_lock *fl) dout("mds locked, locking locally"); err = posix_lock_file(file, fl, NULL); if (err && (CEPH_MDS_OP_SETFILELOCK == op)) { - /* undo! This should only happen if the kernel detects - * local deadlock. */ + /* undo! This should only happen if + * the kernel detects local + * deadlock. */ ceph_lock_message(CEPH_LOCK_FCNTL, op, file, CEPH_LOCK_UNLOCK, 0, fl); - dout("got %d on posix_lock_file, undid lock", err); + dout("got %d on posix_lock_file, undid lock", + err); } } - } else { - dout("mds returned error code %d", err); + } else if (err == -ERESTARTSYS) { + dout("undoing lock\n"); + ceph_lock_message(CEPH_LOCK_FCNTL, op, file, + CEPH_LOCK_UNLOCK, 0, fl); } return err; } @@ -156,8 +159,11 @@ int ceph_flock(struct file *file, int cmd, struct file_lock *fl) file, CEPH_LOCK_UNLOCK, 0, fl); dout("got %d on flock_lock_file_wait, undid lock", err); } - } else { - dout("mds error code %d", err); + } else if (err == -ERESTARTSYS) { + dout("undoing lock\n"); + ceph_lock_message(CEPH_LOCK_FLOCK, + CEPH_MDS_OP_SETFILELOCK, + file, CEPH_LOCK_UNLOCK, 0, fl); } return err; } |