diff options
| author | David Teigland <teigland@redhat.com> | 2006-07-18 11:24:04 -0500 |
|---|---|---|
| committer | Steven Whitehouse <swhiteho@redhat.com> | 2006-07-20 00:11:15 -0400 |
| commit | 34e22bed19013c77f942083e25cfc7adf6c71a8f (patch) | |
| tree | 18c44bb1e3e3d40fc04f61020497f935a97df576 | |
| parent | 3b4a0a74949cf4f87f7ca84cc0457eb5687b2923 (diff) | |
[DLM] fix leaking user locks
User NOQUEUE lock requests to a remote node that failed with -EAGAIN were
never being removed from a process's list of locks.
Signed-off-by: David Teigland <teigland@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
| -rw-r--r-- | fs/dlm/lock.c | 7 | ||||
| -rw-r--r-- | fs/dlm/user.c | 16 |
2 files changed, 20 insertions, 3 deletions
diff --git a/fs/dlm/lock.c b/fs/dlm/lock.c index 82e1ac25184..22744321816 100644 --- a/fs/dlm/lock.c +++ b/fs/dlm/lock.c @@ -526,6 +526,7 @@ static int create_lkb(struct dlm_ls *ls, struct dlm_lkb **lkb_ret) lkb->lkb_nodeid = -1; lkb->lkb_grmode = DLM_LOCK_IV; kref_init(&lkb->lkb_ref); + INIT_LIST_HEAD(&lkb->lkb_ownqueue); get_random_bytes(&bucket, sizeof(bucket)); bucket &= (ls->ls_lkbtbl_size - 1); @@ -3705,7 +3706,7 @@ int dlm_user_unlock(struct dlm_ls *ls, struct dlm_user_args *ua_tmp, goto out_put; spin_lock(&ua->proc->locks_spin); - list_del(&lkb->lkb_ownqueue); + list_del_init(&lkb->lkb_ownqueue); spin_unlock(&ua->proc->locks_spin); /* this removes the reference for the proc->locks list added by @@ -3749,7 +3750,7 @@ int dlm_user_cancel(struct dlm_ls *ls, struct dlm_user_args *ua_tmp, /* this lkb was removed from the WAITING queue */ if (lkb->lkb_grmode == DLM_LOCK_IV) { spin_lock(&ua->proc->locks_spin); - list_del(&lkb->lkb_ownqueue); + list_del_init(&lkb->lkb_ownqueue); spin_unlock(&ua->proc->locks_spin); unhold_lkb(lkb); } @@ -3817,7 +3818,7 @@ void dlm_clear_proc_locks(struct dlm_ls *ls, struct dlm_user_proc *proc) unhold_lkb(lkb); } - list_del(&lkb->lkb_ownqueue); + list_del_init(&lkb->lkb_ownqueue); if (lkb->lkb_exflags & DLM_LKF_PERSISTENT) { lkb->lkb_flags |= DLM_IFL_ORPHAN; diff --git a/fs/dlm/user.c b/fs/dlm/user.c index 1f05960a916..fd19caf9af9 100644 --- a/fs/dlm/user.c +++ b/fs/dlm/user.c @@ -133,6 +133,7 @@ void dlm_user_add_ast(struct dlm_lkb *lkb, int type) struct dlm_ls *ls; struct dlm_user_args *ua; struct dlm_user_proc *proc; + int remove_ownqueue = 0; /* dlm_clear_proc_locks() sets ORPHAN/DEAD flag on each lkb before dealing with it. We need to check this @@ -171,6 +172,14 @@ void dlm_user_add_ast(struct dlm_lkb *lkb, int type) wake_up_interruptible(&proc->wait); } + /* noqueue requests that fail may need to be removed from the + proc's locks list, there should be a better way of detecting + this situation than checking all these things... */ + + if (type == AST_COMP && lkb->lkb_grmode == DLM_LOCK_IV && + ua->lksb.sb_status == -EAGAIN && !list_empty(&lkb->lkb_ownqueue)) + remove_ownqueue = 1; + /* We want to copy the lvb to userspace when the completion ast is read if the status is 0, the lock has an lvb and lvb_ops says we should. We could probably have set_lvb_lock() @@ -185,6 +194,13 @@ void dlm_user_add_ast(struct dlm_lkb *lkb, int type) ua->update_user_lvb = 0; spin_unlock(&proc->asts_spin); + + if (remove_ownqueue) { + spin_lock(&ua->proc->locks_spin); + list_del_init(&lkb->lkb_ownqueue); + spin_unlock(&ua->proc->locks_spin); + dlm_put_lkb(lkb); + } out: mutex_unlock(&ls->ls_clear_proc_locks); } |