/******************************************************************************
*******************************************************************************
**
-** Copyright (C) 2005-2007 Red Hat, Inc. All rights reserved.
+** Copyright (C) 2005-2008 Red Hat, Inc. All rights reserved.
**
** This copyrighted material is made available to anyone wishing to use,
** modify, copy, or redistribute it subject to the terms and conditions
static int receive_extralen(struct dlm_message *ms);
static void do_purge(struct dlm_ls *ls, int nodeid, int pid);
static void del_timeout(struct dlm_lkb *lkb);
-void dlm_timeout_warn(struct dlm_lkb *lkb);
/*
* Lock compatibilty matrix - thanks Steve
{
struct dlm_rsb *r;
- r = allocate_rsb(ls, len);
+ r = dlm_allocate_rsb(ls, len);
if (!r)
return NULL;
error = _search_rsb(ls, name, namelen, bucket, 0, &tmp);
if (!error) {
write_unlock(&ls->ls_rsbtbl[bucket].lock);
- free_rsb(r);
+ dlm_free_rsb(r);
r = tmp;
goto out;
}
list_move(&r->res_hashchain, &ls->ls_rsbtbl[r->res_bucket].toss);
r->res_toss_time = jiffies;
if (r->res_lvbptr) {
- free_lvb(r->res_lvbptr);
+ dlm_free_lvb(r->res_lvbptr);
r->res_lvbptr = NULL;
}
}
uint32_t lkid = 0;
uint16_t bucket;
- lkb = allocate_lkb(ls);
+ lkb = dlm_allocate_lkb(ls);
if (!lkb)
return -ENOMEM;
/* for local/process lkbs, lvbptr points to caller's lksb */
if (lkb->lkb_lvbptr && is_master_copy(lkb))
- free_lvb(lkb->lkb_lvbptr);
- free_lkb(lkb);
+ dlm_free_lvb(lkb->lkb_lvbptr);
+ dlm_free_lkb(lkb);
return 1;
} else {
write_unlock(&ls->ls_lkbtbl[bucket].lock);
if (is_master(r))
dir_remove(r);
- free_rsb(r);
+ dlm_free_rsb(r);
count++;
} else {
write_unlock(&ls->ls_rsbtbl[b].lock);
return;
if (!r->res_lvbptr)
- r->res_lvbptr = allocate_lvb(r->res_ls);
+ r->res_lvbptr = dlm_allocate_lvb(r->res_ls);
if (!r->res_lvbptr)
return;
return;
if (!r->res_lvbptr)
- r->res_lvbptr = allocate_lvb(r->res_ls);
+ r->res_lvbptr = dlm_allocate_lvb(r->res_ls);
if (!r->res_lvbptr)
return;
with a deadlk here, we'd have to generate something like grant_lock with
the deadlk error.) */
-/* returns the highest requested mode of all blocked conversions */
+/* Returns the highest requested mode of all blocked conversions; sets
+ cw if there's a blocked conversion to DLM_LOCK_CW. */
-static int grant_pending_convert(struct dlm_rsb *r, int high)
+static int grant_pending_convert(struct dlm_rsb *r, int high, int *cw)
{
struct dlm_lkb *lkb, *s;
int hi, demoted, quit, grant_restart, demote_restart;
}
hi = max_t(int, lkb->lkb_rqmode, hi);
+
+ if (cw && lkb->lkb_rqmode == DLM_LOCK_CW)
+ *cw = 1;
}
if (grant_restart)
return max_t(int, high, hi);
}
-static int grant_pending_wait(struct dlm_rsb *r, int high)
+static int grant_pending_wait(struct dlm_rsb *r, int high, int *cw)
{
struct dlm_lkb *lkb, *s;
list_for_each_entry_safe(lkb, s, &r->res_waitqueue, lkb_statequeue) {
if (can_be_granted(r, lkb, 0, NULL))
grant_lock_pending(r, lkb);
- else
+ else {
high = max_t(int, lkb->lkb_rqmode, high);
+ if (lkb->lkb_rqmode == DLM_LOCK_CW)
+ *cw = 1;
+ }
}
return high;
}
+/* cw of 1 means there's a lock with a rqmode of DLM_LOCK_CW that's blocked
+ on either the convert or waiting queue.
+ high is the largest rqmode of all locks blocked on the convert or
+ waiting queue. */
+
+static int lock_requires_bast(struct dlm_lkb *gr, int high, int cw)
+{
+ if (gr->lkb_grmode == DLM_LOCK_PR && cw) {
+ if (gr->lkb_highbast < DLM_LOCK_EX)
+ return 1;
+ return 0;
+ }
+
+ if (gr->lkb_highbast < high &&
+ !__dlm_compat_matrix[gr->lkb_grmode+1][high+1])
+ return 1;
+ return 0;
+}
+
static void grant_pending_locks(struct dlm_rsb *r)
{
struct dlm_lkb *lkb, *s;
int high = DLM_LOCK_IV;
+ int cw = 0;
DLM_ASSERT(is_master(r), dlm_dump_rsb(r););
- high = grant_pending_convert(r, high);
- high = grant_pending_wait(r, high);
+ high = grant_pending_convert(r, high, &cw);
+ high = grant_pending_wait(r, high, &cw);
if (high == DLM_LOCK_IV)
return;
/*
* If there are locks left on the wait/convert queue then send blocking
* ASTs to granted locks based on the largest requested mode (high)
- * found above. FIXME: highbast < high comparison not valid for PR/CW.
+ * found above.
*/
list_for_each_entry_safe(lkb, s, &r->res_grantqueue, lkb_statequeue) {
- if (lkb->lkb_bastaddr && (lkb->lkb_highbast < high) &&
- !__dlm_compat_matrix[lkb->lkb_grmode+1][high+1]) {
- queue_bast(r, lkb, high);
+ if (lkb->lkb_bastaddr && lock_requires_bast(lkb, high, cw)) {
+ if (cw && high == DLM_LOCK_PR)
+ queue_bast(r, lkb, DLM_LOCK_CW);
+ else
+ queue_bast(r, lkb, high);
lkb->lkb_highbast = high;
}
}
}
+static int modes_require_bast(struct dlm_lkb *gr, struct dlm_lkb *rq)
+{
+ if ((gr->lkb_grmode == DLM_LOCK_PR && rq->lkb_rqmode == DLM_LOCK_CW) ||
+ (gr->lkb_grmode == DLM_LOCK_CW && rq->lkb_rqmode == DLM_LOCK_PR)) {
+ if (gr->lkb_highbast < DLM_LOCK_EX)
+ return 1;
+ return 0;
+ }
+
+ if (gr->lkb_highbast < rq->lkb_rqmode && !modes_compat(gr, rq))
+ return 1;
+ return 0;
+}
+
static void send_bast_queue(struct dlm_rsb *r, struct list_head *head,
struct dlm_lkb *lkb)
{
struct dlm_lkb *gr;
list_for_each_entry(gr, head, lkb_statequeue) {
- if (gr->lkb_bastaddr &&
- gr->lkb_highbast < lkb->lkb_rqmode &&
- !modes_compat(gr, lkb)) {
+ if (gr->lkb_bastaddr && modes_require_bast(gr, lkb)) {
queue_bast(r, gr, lkb->lkb_rqmode);
gr->lkb_highbast = lkb->lkb_rqmode;
}
break;
case -EAGAIN:
- /* the remote master didn't queue our NOQUEUE request;
- make a waiting lkb the first_lkid */
+ case -EBADR:
+ case -ENOTBLK:
+ /* the remote request failed and won't be retried (it was
+ a NOQUEUE, or has been canceled/unlocked); make a waiting
+ lkb the first_lkid */
r->res_first_lkid = 0;
/* an lkb may be waiting for an rsb lookup to complete where the
lookup was initiated by another lock */
- if (args->flags & (DLM_LKF_CANCEL | DLM_LKF_FORCEUNLOCK)) {
- if (!list_empty(&lkb->lkb_rsb_lookup)) {
+ if (!list_empty(&lkb->lkb_rsb_lookup)) {
+ if (args->flags & (DLM_LKF_CANCEL | DLM_LKF_FORCEUNLOCK)) {
log_debug(ls, "unlock on rsb_lookup %x", lkb->lkb_id);
list_del_init(&lkb->lkb_rsb_lookup);
queue_cast(lkb->lkb_resource, lkb,
args->flags & DLM_LKF_CANCEL ?
-DLM_ECANCEL : -DLM_EUNLOCK);
unhold_lkb(lkb); /* undoes create_lkb() */
- rv = -EBUSY;
- goto out;
}
+ /* caller changes -EBUSY to 0 for CANCEL and FORCEUNLOCK */
+ rv = -EBUSY;
+ goto out;
}
/* cancel not allowed with another cancel/unlock in progress */
before we try again to grant this one. */
if (is_demoted(lkb)) {
- grant_pending_convert(r, DLM_LOCK_IV);
+ grant_pending_convert(r, DLM_LOCK_IV, NULL);
if (_can_be_granted(r, lkb, 1)) {
grant_lock(r, lkb);
queue_cast(r, lkb, 0);
if (lkb->lkb_exflags & DLM_LKF_VALBLK) {
if (!lkb->lkb_lvbptr)
- lkb->lkb_lvbptr = allocate_lvb(ls);
+ lkb->lkb_lvbptr = dlm_allocate_lvb(ls);
if (!lkb->lkb_lvbptr)
return -ENOMEM;
len = receive_extralen(ms);
lkb->lkb_bastaddr = (void *) (long) (ms->m_asts & AST_BAST);
lkb->lkb_astaddr = (void *) (long) (ms->m_asts & AST_COMP);
- DLM_ASSERT(is_master_copy(lkb), dlm_print_lkb(lkb););
-
if (lkb->lkb_exflags & DLM_LKF_VALBLK) {
/* lkb was just created so there won't be an lvb yet */
- lkb->lkb_lvbptr = allocate_lvb(ls);
+ lkb->lkb_lvbptr = dlm_allocate_lvb(ls);
if (!lkb->lkb_lvbptr)
return -ENOMEM;
}
static int receive_convert_args(struct dlm_ls *ls, struct dlm_lkb *lkb,
struct dlm_message *ms)
{
- if (lkb->lkb_nodeid != ms->m_header.h_nodeid) {
- log_error(ls, "convert_args nodeid %d %d lkid %x %x",
- lkb->lkb_nodeid, ms->m_header.h_nodeid,
- lkb->lkb_id, lkb->lkb_remid);
- return -EINVAL;
- }
-
- if (!is_master_copy(lkb))
- return -EINVAL;
-
if (lkb->lkb_status != DLM_LKSTS_GRANTED)
return -EBUSY;
static int receive_unlock_args(struct dlm_ls *ls, struct dlm_lkb *lkb,
struct dlm_message *ms)
{
- if (!is_master_copy(lkb))
- return -EINVAL;
if (receive_lvb(ls, lkb, ms))
return -ENOMEM;
return 0;
lkb->lkb_remid = ms->m_lkid;
}
+/* This is called after the rsb is locked so that we can safely inspect
+ fields in the lkb. */
+
+static int validate_message(struct dlm_lkb *lkb, struct dlm_message *ms)
+{
+ int from = ms->m_header.h_nodeid;
+ int error = 0;
+
+ switch (ms->m_type) {
+ case DLM_MSG_CONVERT:
+ case DLM_MSG_UNLOCK:
+ case DLM_MSG_CANCEL:
+ if (!is_master_copy(lkb) || lkb->lkb_nodeid != from)
+ error = -EINVAL;
+ break;
+
+ case DLM_MSG_CONVERT_REPLY:
+ case DLM_MSG_UNLOCK_REPLY:
+ case DLM_MSG_CANCEL_REPLY:
+ case DLM_MSG_GRANT:
+ case DLM_MSG_BAST:
+ if (!is_process_copy(lkb) || lkb->lkb_nodeid != from)
+ error = -EINVAL;
+ break;
+
+ case DLM_MSG_REQUEST_REPLY:
+ if (!is_process_copy(lkb))
+ error = -EINVAL;
+ else if (lkb->lkb_nodeid != -1 && lkb->lkb_nodeid != from)
+ error = -EINVAL;
+ break;
+
+ default:
+ error = -EINVAL;
+ }
+
+ if (error)
+ log_error(lkb->lkb_resource->res_ls,
+ "ignore invalid message %d from %d %x %x %x %d",
+ ms->m_type, from, lkb->lkb_id, lkb->lkb_remid,
+ lkb->lkb_flags, lkb->lkb_nodeid);
+ return error;
+}
+
static void receive_request(struct dlm_ls *ls, struct dlm_message *ms)
{
struct dlm_lkb *lkb;
hold_rsb(r);
lock_rsb(r);
+ error = validate_message(lkb, ms);
+ if (error)
+ goto out;
+
receive_flags(lkb, ms);
error = receive_convert_args(ls, lkb, ms);
if (error)
- goto out;
+ goto out_reply;
reply = !down_conversion(lkb);
error = do_convert(r, lkb);
- out:
+ out_reply:
if (reply)
send_convert_reply(r, lkb, error);
-
+ out:
unlock_rsb(r);
put_rsb(r);
dlm_put_lkb(lkb);
hold_rsb(r);
lock_rsb(r);
+ error = validate_message(lkb, ms);
+ if (error)
+ goto out;
+
receive_flags(lkb, ms);
error = receive_unlock_args(ls, lkb, ms);
if (error)
- goto out;
+ goto out_reply;
error = do_unlock(r, lkb);
- out:
+ out_reply:
send_unlock_reply(r, lkb, error);
-
+ out:
unlock_rsb(r);
put_rsb(r);
dlm_put_lkb(lkb);
hold_rsb(r);
lock_rsb(r);
+ error = validate_message(lkb, ms);
+ if (error)
+ goto out;
+
error = do_cancel(r, lkb);
send_cancel_reply(r, lkb, error);
-
+ out:
unlock_rsb(r);
put_rsb(r);
dlm_put_lkb(lkb);
error = find_lkb(ls, ms->m_remid, &lkb);
if (error) {
- log_error(ls, "receive_grant no lkb");
+ log_debug(ls, "receive_grant from %d no lkb %x",
+ ms->m_header.h_nodeid, ms->m_remid);
return;
}
- DLM_ASSERT(is_process_copy(lkb), dlm_print_lkb(lkb););
r = lkb->lkb_resource;
hold_rsb(r);
lock_rsb(r);
+ error = validate_message(lkb, ms);
+ if (error)
+ goto out;
+
receive_flags_reply(lkb, ms);
if (is_altmode(lkb))
munge_altmode(lkb, ms);
grant_lock_pc(r, lkb, ms);
queue_cast(r, lkb, 0);
-
+ out:
unlock_rsb(r);
put_rsb(r);
dlm_put_lkb(lkb);
error = find_lkb(ls, ms->m_remid, &lkb);
if (error) {
- log_error(ls, "receive_bast no lkb");
+ log_debug(ls, "receive_bast from %d no lkb %x",
+ ms->m_header.h_nodeid, ms->m_remid);
return;
}
- DLM_ASSERT(is_process_copy(lkb), dlm_print_lkb(lkb););
r = lkb->lkb_resource;
hold_rsb(r);
lock_rsb(r);
- queue_bast(r, lkb, ms->m_bastmode);
+ error = validate_message(lkb, ms);
+ if (error)
+ goto out;
+ queue_bast(r, lkb, ms->m_bastmode);
+ out:
unlock_rsb(r);
put_rsb(r);
dlm_put_lkb(lkb);
error = find_lkb(ls, ms->m_remid, &lkb);
if (error) {
- log_error(ls, "receive_request_reply no lkb");
+ log_debug(ls, "receive_request_reply from %d no lkb %x",
+ ms->m_header.h_nodeid, ms->m_remid);
return;
}
- DLM_ASSERT(is_process_copy(lkb), dlm_print_lkb(lkb););
r = lkb->lkb_resource;
hold_rsb(r);
lock_rsb(r);
+ error = validate_message(lkb, ms);
+ if (error)
+ goto out;
+
mstype = lkb->lkb_wait_type;
error = remove_from_waiters(lkb, DLM_MSG_REQUEST_REPLY);
if (error)
if (is_overlap(lkb)) {
/* we'll ignore error in cancel/unlock reply */
queue_cast_overlap(r, lkb);
+ confirm_master(r, result);
unhold_lkb(lkb); /* undoes create_lkb() */
} else
_request_lock(r, lkb);
hold_rsb(r);
lock_rsb(r);
+ error = validate_message(lkb, ms);
+ if (error)
+ goto out;
+
/* stub reply can happen with waiters_mutex held */
error = remove_from_waiters_ms(lkb, ms);
if (error)
error = find_lkb(ls, ms->m_remid, &lkb);
if (error) {
- log_error(ls, "receive_convert_reply no lkb");
+ log_debug(ls, "receive_convert_reply from %d no lkb %x",
+ ms->m_header.h_nodeid, ms->m_remid);
return;
}
- DLM_ASSERT(is_process_copy(lkb), dlm_print_lkb(lkb););
_receive_convert_reply(lkb, ms);
dlm_put_lkb(lkb);
hold_rsb(r);
lock_rsb(r);
+ error = validate_message(lkb, ms);
+ if (error)
+ goto out;
+
/* stub reply can happen with waiters_mutex held */
error = remove_from_waiters_ms(lkb, ms);
if (error)
error = find_lkb(ls, ms->m_remid, &lkb);
if (error) {
- log_error(ls, "receive_unlock_reply no lkb");
+ log_debug(ls, "receive_unlock_reply from %d no lkb %x",
+ ms->m_header.h_nodeid, ms->m_remid);
return;
}
- DLM_ASSERT(is_process_copy(lkb), dlm_print_lkb(lkb););
_receive_unlock_reply(lkb, ms);
dlm_put_lkb(lkb);
hold_rsb(r);
lock_rsb(r);
+ error = validate_message(lkb, ms);
+ if (error)
+ goto out;
+
/* stub reply can happen with waiters_mutex held */
error = remove_from_waiters_ms(lkb, ms);
if (error)
error = find_lkb(ls, ms->m_remid, &lkb);
if (error) {
- log_error(ls, "receive_cancel_reply no lkb");
+ log_debug(ls, "receive_cancel_reply from %d no lkb %x",
+ ms->m_header.h_nodeid, ms->m_remid);
return;
}
- DLM_ASSERT(is_process_copy(lkb), dlm_print_lkb(lkb););
_receive_cancel_reply(lkb, ms);
dlm_put_lkb(lkb);
dlm_put_lkb(lkb);
}
-int dlm_receive_message(struct dlm_header *hd, int nodeid, int recovery)
+static void _receive_message(struct dlm_ls *ls, struct dlm_message *ms)
{
- struct dlm_message *ms = (struct dlm_message *) hd;
- struct dlm_ls *ls;
- int error = 0;
-
- if (!recovery)
- dlm_message_in(ms);
-
- ls = dlm_find_lockspace_global(hd->h_lockspace);
- if (!ls) {
- log_print("drop message %d from %d for unknown lockspace %d",
- ms->m_type, nodeid, hd->h_lockspace);
- return -EINVAL;
- }
-
- /* recovery may have just ended leaving a bunch of backed-up requests
- in the requestqueue; wait while dlm_recoverd clears them */
-
- if (!recovery)
- dlm_wait_requestqueue(ls);
-
- /* recovery may have just started while there were a bunch of
- in-flight requests -- save them in requestqueue to be processed
- after recovery. we can't let dlm_recvd block on the recovery
- lock. if dlm_recoverd is calling this function to clear the
- requestqueue, it needs to be interrupted (-EINTR) if another
- recovery operation is starting. */
-
- while (1) {
- if (dlm_locking_stopped(ls)) {
- if (recovery) {
- error = -EINTR;
- goto out;
- }
- error = dlm_add_requestqueue(ls, nodeid, hd);
- if (error == -EAGAIN)
- continue;
- else {
- error = -EINTR;
- goto out;
- }
- }
-
- if (dlm_lock_recovery_try(ls))
- break;
- schedule();
+ if (!dlm_is_member(ls, ms->m_header.h_nodeid)) {
+ log_debug(ls, "ignore non-member message %d from %d %x %x %d",
+ ms->m_type, ms->m_header.h_nodeid, ms->m_lkid,
+ ms->m_remid, ms->m_result);
+ return;
}
switch (ms->m_type) {
log_error(ls, "unknown message type %d", ms->m_type);
}
- dlm_unlock_recovery(ls);
- out:
- dlm_put_lockspace(ls);
dlm_astd_wake();
- return error;
}
+/* If the lockspace is in recovery mode (locking stopped), then normal
+ messages are saved on the requestqueue for processing after recovery is
+ done. When not in recovery mode, we wait for dlm_recoverd to drain saved
+ messages off the requestqueue before we process new ones. This occurs right
+ after recovery completes when we transition from saving all messages on
+ requestqueue, to processing all the saved messages, to processing new
+ messages as they arrive. */
-/*
- * Recovery related
- */
+static void dlm_receive_message(struct dlm_ls *ls, struct dlm_message *ms,
+ int nodeid)
+{
+ if (dlm_locking_stopped(ls)) {
+ dlm_add_requestqueue(ls, nodeid, (struct dlm_header *) ms);
+ } else {
+ dlm_wait_requestqueue(ls);
+ _receive_message(ls, ms);
+ }
+}
+
+/* This is called by dlm_recoverd to process messages that were saved on
+ the requestqueue. */
+
+void dlm_receive_message_saved(struct dlm_ls *ls, struct dlm_message *ms)
+{
+ _receive_message(ls, ms);
+}
+
+/* This is called by the midcomms layer when something is received for
+ the lockspace. It could be either a MSG (normal message sent as part of
+ standard locking activity) or an RCOM (recovery message sent as part of
+ lockspace recovery). */
+
+void dlm_receive_buffer(struct dlm_header *hd, int nodeid)
+{
+ struct dlm_message *ms = (struct dlm_message *) hd;
+ struct dlm_rcom *rc = (struct dlm_rcom *) hd;
+ struct dlm_ls *ls;
+ int type = 0;
+
+ switch (hd->h_cmd) {
+ case DLM_MSG:
+ dlm_message_in(ms);
+ type = ms->m_type;
+ break;
+ case DLM_RCOM:
+ dlm_rcom_in(rc);
+ type = rc->rc_type;
+ break;
+ default:
+ log_print("invalid h_cmd %d from %u", hd->h_cmd, nodeid);
+ return;
+ }
+
+ if (hd->h_nodeid != nodeid) {
+ log_print("invalid h_nodeid %d from %d lockspace %x",
+ hd->h_nodeid, nodeid, hd->h_lockspace);
+ return;
+ }
+
+ ls = dlm_find_lockspace_global(hd->h_lockspace);
+ if (!ls) {
+ log_print("invalid h_lockspace %x from %d cmd %d type %d",
+ hd->h_lockspace, nodeid, hd->h_cmd, type);
+
+ if (hd->h_cmd == DLM_RCOM && type == DLM_RCOM_STATUS)
+ dlm_send_ls_not_ready(nodeid, rc);
+ return;
+ }
+
+ /* this rwsem allows dlm_ls_stop() to wait for all dlm_recv threads to
+ be inactive (in this ls) before transitioning to recovery mode */
+
+ down_read(&ls->ls_recv_active);
+ if (hd->h_cmd == DLM_MSG)
+ dlm_receive_message(ls, ms, nodeid);
+ else
+ dlm_receive_rcom(ls, rc, nodeid);
+ up_read(&ls->ls_recv_active);
+
+ dlm_put_lockspace(ls);
+}
static void recover_convert_waiter(struct dlm_ls *ls, struct dlm_lkb *lkb)
{
ls->ls_stub_ms.m_type = DLM_MSG_CONVERT_REPLY;
ls->ls_stub_ms.m_result = -EINPROGRESS;
ls->ls_stub_ms.m_flags = lkb->lkb_flags;
+ ls->ls_stub_ms.m_header.h_nodeid = lkb->lkb_nodeid;
_receive_convert_reply(lkb, &ls->ls_stub_ms);
/* Same special case as in receive_rcom_lock_args() */
void dlm_recover_waiters_pre(struct dlm_ls *ls)
{
struct dlm_lkb *lkb, *safe;
+ int wait_type, stub_unlock_result, stub_cancel_result;
mutex_lock(&ls->ls_waiters_mutex);
if (!waiter_needs_recovery(ls, lkb))
continue;
- switch (lkb->lkb_wait_type) {
+ wait_type = lkb->lkb_wait_type;
+ stub_unlock_result = -DLM_EUNLOCK;
+ stub_cancel_result = -DLM_ECANCEL;
+
+ /* Main reply may have been received leaving a zero wait_type,
+ but a reply for the overlapping op may not have been
+ received. In that case we need to fake the appropriate
+ reply for the overlap op. */
+
+ if (!wait_type) {
+ if (is_overlap_cancel(lkb)) {
+ wait_type = DLM_MSG_CANCEL;
+ if (lkb->lkb_grmode == DLM_LOCK_IV)
+ stub_cancel_result = 0;
+ }
+ if (is_overlap_unlock(lkb)) {
+ wait_type = DLM_MSG_UNLOCK;
+ if (lkb->lkb_grmode == DLM_LOCK_IV)
+ stub_unlock_result = -ENOENT;
+ }
+
+ log_debug(ls, "rwpre overlap %x %x %d %d %d",
+ lkb->lkb_id, lkb->lkb_flags, wait_type,
+ stub_cancel_result, stub_unlock_result);
+ }
+
+ switch (wait_type) {
case DLM_MSG_REQUEST:
lkb->lkb_flags |= DLM_IFL_RESEND;
case DLM_MSG_UNLOCK:
hold_lkb(lkb);
ls->ls_stub_ms.m_type = DLM_MSG_UNLOCK_REPLY;
- ls->ls_stub_ms.m_result = -DLM_EUNLOCK;
+ ls->ls_stub_ms.m_result = stub_unlock_result;
ls->ls_stub_ms.m_flags = lkb->lkb_flags;
+ ls->ls_stub_ms.m_header.h_nodeid = lkb->lkb_nodeid;
_receive_unlock_reply(lkb, &ls->ls_stub_ms);
dlm_put_lkb(lkb);
break;
case DLM_MSG_CANCEL:
hold_lkb(lkb);
ls->ls_stub_ms.m_type = DLM_MSG_CANCEL_REPLY;
- ls->ls_stub_ms.m_result = -DLM_ECANCEL;
+ ls->ls_stub_ms.m_result = stub_cancel_result;
ls->ls_stub_ms.m_flags = lkb->lkb_flags;
+ ls->ls_stub_ms.m_header.h_nodeid = lkb->lkb_nodeid;
_receive_cancel_reply(lkb, &ls->ls_stub_ms);
dlm_put_lkb(lkb);
break;
default:
- log_error(ls, "invalid lkb wait_type %d",
- lkb->lkb_wait_type);
+ log_error(ls, "invalid lkb wait_type %d %d",
+ lkb->lkb_wait_type, wait_type);
}
schedule();
}
lkb->lkb_astaddr = (void *) (long) (rl->rl_asts & AST_COMP);
if (lkb->lkb_exflags & DLM_LKF_VALBLK) {
- lkb->lkb_lvbptr = allocate_lvb(ls);
+ lkb->lkb_lvbptr = dlm_allocate_lvb(ls);
if (!lkb->lkb_lvbptr)
return -ENOMEM;
lvblen = rc->rc_header.h_length - sizeof(struct dlm_rcom) -
put_rsb(r);
out:
if (error)
- log_print("recover_master_copy %d %x", error, rl->rl_lkid);
+ log_debug(ls, "recover_master_copy %d %x", error, rl->rl_lkid);
rl->rl_result = error;
return error;
}
}
}
- /* After ua is attached to lkb it will be freed by free_lkb().
+ /* After ua is attached to lkb it will be freed by dlm_free_lkb().
When DLM_IFL_USER is set, the dlm knows that this is a userspace
lock and that lkb_astparam is the dlm_user_args structure. */
if (lvb_in && ua->lksb.sb_lvbptr)
memcpy(ua->lksb.sb_lvbptr, lvb_in, DLM_USER_LVB_LEN);
- ua->castparam = ua_tmp->castparam;
+ if (ua_tmp->castparam)
+ ua->castparam = ua_tmp->castparam;
ua->user_lksb = ua_tmp->user_lksb;
error = set_unlock_args(flags, ua, &args);
goto out;
ua = (struct dlm_user_args *)lkb->lkb_astparam;
- ua->castparam = ua_tmp->castparam;
+ if (ua_tmp->castparam)
+ ua->castparam = ua_tmp->castparam;
ua->user_lksb = ua_tmp->user_lksb;
error = set_unlock_args(flags, ua, &args);
}
list_for_each_entry_safe(lkb, safe, &proc->asts, lkb_astqueue) {
+ lkb->lkb_ast_type = 0;
list_del(&lkb->lkb_astqueue);
dlm_put_lkb(lkb);
}
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff