diff options
| author | Alexander Aring | 2023-05-19 11:21:27 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman | 2023-07-23 13:49:38 +0200 |
| commit | adeaef5a00dcfe023b0ecae3272ef0fd556efbaf (patch) | |
| tree | ec9967e3ab94cd6f08602410122a034a166eaddc /fs/dlm | |
| parent | 2a37d73395a51238a324a94b64bba734417ff2f8 (diff) | |
fs: dlm: make F_SETLK use unkillable wait_event
commit 0f2b1cb89ccdbdcedf7143f4153a4da700a05f48 upstream.
While a non-waiting posix lock request (F_SETLK) is waiting for
user space processing (in dlm_controld), wait for that processing
to complete with an unkillable wait_event(). This makes F_SETLK
behave the same way for F_RDLCK, F_WRLCK and F_UNLCK. F_SETLKW
continues to use wait_event_killable().
Cc: stable@vger.kernel.org
Signed-off-by: Alexander Aring <aahringo@redhat.com>
Signed-off-by: David Teigland <teigland@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs/dlm')
| -rw-r--r-- | fs/dlm/plock.c | 38 |
1 files changed, 21 insertions, 17 deletions
diff --git a/fs/dlm/plock.c b/fs/dlm/plock.c index 7754d66ea9d8..0df24702125e 100644 --- a/fs/dlm/plock.c +++ b/fs/dlm/plock.c @@ -154,25 +154,29 @@ int dlm_posix_lock(dlm_lockspace_t *lockspace, u64 number, struct file *file, send_op(op); - rv = wait_event_killable(recv_wq, (op->done != 0)); - if (rv == -ERESTARTSYS) { - spin_lock(&ops_lock); - /* recheck under ops_lock if we got a done != 0, - * if so this interrupt case should be ignored - */ - if (op->done != 0) { + if (op->info.wait) { + rv = wait_event_killable(recv_wq, (op->done != 0)); + if (rv == -ERESTARTSYS) { + spin_lock(&ops_lock); + /* recheck under ops_lock if we got a done != 0, + * if so this interrupt case should be ignored + */ + if (op->done != 0) { + spin_unlock(&ops_lock); + goto do_lock_wait; + } + list_del(&op->list); spin_unlock(&ops_lock); - goto do_lock_wait; - } - list_del(&op->list); - spin_unlock(&ops_lock); - log_debug(ls, "%s: wait interrupted %x %llx pid %d", - __func__, ls->ls_global_id, - (unsigned long long)number, op->info.pid); - do_unlock_close(&op->info); - dlm_release_plock_op(op); - goto out; + log_debug(ls, "%s: wait interrupted %x %llx pid %d", + __func__, ls->ls_global_id, + (unsigned long long)number, op->info.pid); + do_unlock_close(&op->info); + dlm_release_plock_op(op); + goto out; + } + } else { + wait_event(recv_wq, (op->done != 0)); } do_lock_wait: |