AcoSail/kernel_optimize_test
8
0
Fork 0
forked from luck/tmp_suning_uos_patched
Code Pull Requests Activity

ceph: remove duplicated filelock ref increase

Browse Source 
Inode i_filelock_ref is increased in ceph_lock or ceph_flock, but it is
increased again in ceph_lock_message. This results in this ref won't
become zero. If CEPH_I_ERROR_FILELOCK flag is set in
remove_session_caps once, this flag can't be cleared even if client is
back to normal. So further file lock will return EIO.

Signed-off-by: Zhi Zhang <zhang.david2011@gmail.com>
Reviewed-by: "Yan, Zheng" <zyan@redhat.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
This commit is contained in:
Zhi Zhang 2019-03-22 14:16:33 +08:00 committed by Ilya Dryomov
parent e93c9c99a6
commit 1b52931ca9
1 changed files with 0 additions and 13 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
fs/ceph/locks.c
View File

@ -237,15 +237,6 @@ int ceph_lock(struct file *file, int cmd, struct file_lock *fl)
spin_lock(&ci->i_ceph_lock);
if (ci->i_ceph_flags & CEPH_I_ERROR_FILELOCK) {
err = -EIO;
} else if (op == CEPH_MDS_OP_SETFILELOCK) {
/*
* increasing i_filelock_ref closes race window between
* handling request reply and adding file_lock struct to
* inode. Otherwise, i_auth_cap may get trimmed in the
* window. Caller function will decrease the counter.
*/
fl->fl_ops = &ceph_fl_lock_ops;
atomic_inc(&ci->i_filelock_ref);
}
spin_unlock(&ci->i_ceph_lock);
if (err < 0) {
@ -299,10 +290,6 @@ int ceph_flock(struct file *file, int cmd, struct file_lock *fl)
spin_lock(&ci->i_ceph_lock);
if (ci->i_ceph_flags & CEPH_I_ERROR_FILELOCK) {
err = -EIO;
} else {
/* see comment in ceph_lock */
fl->fl_ops = &ceph_fl_lock_ops;
atomic_inc(&ci->i_filelock_ref);
}
spin_unlock(&ci->i_ceph_lock);
if (err < 0) {