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-rw-r--r--fs/dlm/lock.c101
1 files changed, 101 insertions, 0 deletions
diff --git a/fs/dlm/lock.c b/fs/dlm/lock.c
index 7807958846c..9d26b3a3967 100644
--- a/fs/dlm/lock.c
+++ b/fs/dlm/lock.c
@@ -85,6 +85,7 @@ static int _request_lock(struct dlm_rsb *r, struct dlm_lkb *lkb);
static void __receive_convert_reply(struct dlm_rsb *r, struct dlm_lkb *lkb,
struct dlm_message *ms);
static int receive_extralen(struct dlm_message *ms);
+static void do_purge(struct dlm_ls *ls, int nodeid, int pid);
/*
* Lock compatibilty matrix - thanks Steve
@@ -2987,6 +2988,11 @@ static void receive_remove(struct dlm_ls *ls, struct dlm_message *ms)
dlm_dir_remove_entry(ls, from_nodeid, ms->m_extra, len);
}
+static void receive_purge(struct dlm_ls *ls, struct dlm_message *ms)
+{
+ do_purge(ls, ms->m_nodeid, ms->m_pid);
+}
+
static void receive_request_reply(struct dlm_ls *ls, struct dlm_message *ms)
{
struct dlm_lkb *lkb;
@@ -3409,6 +3415,12 @@ int dlm_receive_message(struct dlm_header *hd, int nodeid, int recovery)
receive_lookup_reply(ls, ms);
break;
+ /* other messages */
+
+ case DLM_MSG_PURGE:
+ receive_purge(ls, ms);
+ break;
+
default:
log_error(ls, "unknown message type %d", ms->m_type);
}
@@ -4260,3 +4272,92 @@ void dlm_clear_proc_locks(struct dlm_ls *ls, struct dlm_user_proc *proc)
unlock_recovery(ls);
}
+static void purge_proc_locks(struct dlm_ls *ls, struct dlm_user_proc *proc)
+{
+ struct dlm_lkb *lkb, *safe;
+
+ while (1) {
+ lkb = NULL;
+ spin_lock(&proc->locks_spin);
+ if (!list_empty(&proc->locks)) {
+ lkb = list_entry(proc->locks.next, struct dlm_lkb,
+ lkb_ownqueue);
+ list_del_init(&lkb->lkb_ownqueue);
+ }
+ spin_unlock(&proc->locks_spin);
+
+ if (!lkb)
+ break;
+
+ lkb->lkb_flags |= DLM_IFL_DEAD;
+ unlock_proc_lock(ls, lkb);
+ dlm_put_lkb(lkb); /* ref from proc->locks list */
+ }
+
+ spin_lock(&proc->locks_spin);
+ list_for_each_entry_safe(lkb, safe, &proc->unlocking, lkb_ownqueue) {
+ list_del_init(&lkb->lkb_ownqueue);
+ lkb->lkb_flags |= DLM_IFL_DEAD;
+ dlm_put_lkb(lkb);
+ }
+ spin_unlock(&proc->locks_spin);
+
+ spin_lock(&proc->asts_spin);
+ list_for_each_entry_safe(lkb, safe, &proc->asts, lkb_astqueue) {
+ list_del(&lkb->lkb_astqueue);
+ dlm_put_lkb(lkb);
+ }
+ spin_unlock(&proc->asts_spin);
+}
+
+/* pid of 0 means purge all orphans */
+
+static void do_purge(struct dlm_ls *ls, int nodeid, int pid)
+{
+ struct dlm_lkb *lkb, *safe;
+
+ mutex_lock(&ls->ls_orphans_mutex);
+ list_for_each_entry_safe(lkb, safe, &ls->ls_orphans, lkb_ownqueue) {
+ if (pid && lkb->lkb_ownpid != pid)
+ continue;
+ unlock_proc_lock(ls, lkb);
+ list_del_init(&lkb->lkb_ownqueue);
+ dlm_put_lkb(lkb);
+ }
+ mutex_unlock(&ls->ls_orphans_mutex);
+}
+
+static int send_purge(struct dlm_ls *ls, int nodeid, int pid)
+{
+ struct dlm_message *ms;
+ struct dlm_mhandle *mh;
+ int error;
+
+ error = _create_message(ls, sizeof(struct dlm_message), nodeid,
+ DLM_MSG_PURGE, &ms, &mh);
+ if (error)
+ return error;
+ ms->m_nodeid = nodeid;
+ ms->m_pid = pid;
+
+ return send_message(mh, ms);
+}
+
+int dlm_user_purge(struct dlm_ls *ls, struct dlm_user_proc *proc,
+ int nodeid, int pid)
+{
+ int error = 0;
+
+ if (nodeid != dlm_our_nodeid()) {
+ error = send_purge(ls, nodeid, pid);
+ } else {
+ lock_recovery(ls);
+ if (pid == current->pid)
+ purge_proc_locks(ls, proc);
+ else
+ do_purge(ls, nodeid, pid);
+ unlock_recovery(ls);
+ }
+ return error;
+}
+