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authorJeff Layton <jlayton@primarydata.com>2014-09-01 14:27:43 -0400
committerJeff Layton <jlayton@primarydata.com>2014-10-07 14:06:13 -0400
commit843c6b2f4cef384af8e0de6b7ac7191675030e3a (patch)
treebd40fa64f4a6a5b4a9bcd9f37fafcb32e0efc9da
parentc45198eda2794bb72601c9f96266d8b95db66dd5 (diff)
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.c6
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;