diff options
| author | Jeff Layton <jlayton@primarydata.com> | 2014-09-01 22:27:43 +0400 |
|---|---|---|
| committer | Jeff Layton <jlayton@primarydata.com> | 2014-10-07 22:06:13 +0400 |
| commit | 843c6b2f4cef384af8e0de6b7ac7191675030e3a (patch) | |
| tree | bd40fa64f4a6a5b4a9bcd9f37fafcb32e0efc9da | |
| parent | c45198eda2794bb72601c9f96266d8b95db66dd5 (diff) | |
| download | linux-843c6b2f4cef384af8e0de6b7ac7191675030e3a.tar.xz | |
locks: remove i_have_this_lease check from __break_lease
I think that the intent of this code was to ensure that a process won't
deadlock if it has one fd open with a lease on it and then breaks that
lease by opening another fd. In that case it'll treat the __break_lease
call as if it were non-blocking.
This seems wrong -- the process could (for instance) be multithreaded
and managing different fds via different threads. I also don't see any
mention of this limitation in the (somewhat sketchy) documentation.
Remove the check and the non-blocking behavior when i_have_this_lease
is true.
Signed-off-by: Jeff Layton <jlayton@primarydata.com>
| -rw-r--r-- | fs/locks.c | 6 |
1 files changed, 2 insertions, 4 deletions
diff --git a/fs/locks.c b/fs/locks.c index c0f789dfa655..4e8cf5da2868 100644 --- a/fs/locks.c +++ b/fs/locks.c @@ -1370,7 +1370,6 @@ int __break_lease(struct inode *inode, unsigned int mode, unsigned int type) struct file_lock *new_fl, *flock; struct file_lock *fl; unsigned long break_time; - int i_have_this_lease = 0; bool lease_conflict = false; int want_write = (mode & O_ACCMODE) != O_RDONLY; LIST_HEAD(dispose); @@ -1391,8 +1390,7 @@ int __break_lease(struct inode *inode, unsigned int mode, unsigned int type) for (fl = flock; fl && IS_LEASE(fl); fl = fl->fl_next) { if (leases_conflict(fl, new_fl)) { lease_conflict = true; - if (fl->fl_owner == current->files) - i_have_this_lease = 1; + break; } } if (!lease_conflict) @@ -1422,7 +1420,7 @@ int __break_lease(struct inode *inode, unsigned int mode, unsigned int type) fl->fl_lmops->lm_break(fl); } - if (i_have_this_lease || (mode & O_NONBLOCK)) { + if (mode & O_NONBLOCK) { trace_break_lease_noblock(inode, new_fl); error = -EWOULDBLOCK; goto out; |