/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
* vim:expandtab:shiftwidth=8:tabstop=8:
*
- * Copyright (C) 2002 Cluster File Systems, Inc.
+ * Copyright (C) 2002, 2003 Cluster File Systems, Inc.
*
- * This code is issued under the GNU General Public License.
- * See the file COPYING in this distribution
+ * This file is part of Lustre, http://www.lustre.org.
*
- * by Cluster File Systems, Inc.
+ * Lustre is free software; you can redistribute it and/or
+ * modify it under the terms of version 2 of the GNU General Public
+ * License as published by the Free Software Foundation.
+ *
+ * Lustre is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Lustre; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#define DEBUG_SUBSYSTEM S_LDLM
+#ifndef __KERNEL__
+#include <signal.h>
+#include <liblustre.h>
+#endif
#include <linux/lustre_dlm.h>
+#include <linux/obd_class.h>
#include <linux/obd.h>
-int ldlm_completion_ast(struct ldlm_lock *lock, int flags)
+#include "ldlm_internal.h"
+
+static void interrupted_completion_wait(void *data)
+{
+}
+
+struct lock_wait_data {
+ struct ldlm_lock *lwd_lock;
+ int lwd_generation;
+};
+
+int ldlm_expired_completion_wait(void *data)
+{
+ struct lock_wait_data *lwd = data;
+ struct ldlm_lock *lock = lwd->lwd_lock;
+ struct obd_import *imp;
+ struct obd_device *obd;
+
+ if (lock->l_conn_export == NULL) {
+ static unsigned long next_dump = 0;
+
+ LDLM_ERROR(lock, "lock timed out; not entering recovery in "
+ "server code, just going back to sleep");
+ if (time_after(jiffies, next_dump)) {
+ ldlm_namespace_dump(lock->l_resource->lr_namespace);
+ if (next_dump == 0)
+ portals_debug_dumplog();
+ next_dump = jiffies + 300 * HZ;
+ }
+ RETURN(0);
+ }
+
+ obd = lock->l_conn_export->exp_obd;
+ imp = obd->u.cli.cl_import;
+ ptlrpc_fail_import(imp, lwd->lwd_generation);
+ LDLM_ERROR(lock, "lock timed out, entering recovery for %s@%s",
+ imp->imp_target_uuid.uuid,
+ imp->imp_connection->c_remote_uuid.uuid);
+
+ RETURN(0);
+}
+
+int ldlm_completion_ast(struct ldlm_lock *lock, int flags, void *data)
{
+ /* XXX ALLOCATE - 160 bytes */
+ struct lock_wait_data lwd;
+ unsigned long irqflags;
+ struct obd_device *obd;
+ struct obd_import *imp = NULL;
+ struct l_wait_info lwi;
+ int rc = 0;
ENTRY;
- if (flags & (LDLM_FL_BLOCK_WAIT | LDLM_FL_BLOCK_GRANTED |
- LDLM_FL_BLOCK_CONV)) {
- /* Go to sleep until the lock is granted. */
- /* FIXME: or cancelled. */
- LDLM_DEBUG(lock, "client-side enqueue returned a blocked lock,"
- " sleeping");
- ldlm_lock_dump(lock);
- ldlm_reprocess_all(lock->l_resource);
- wait_event(lock->l_waitq, (lock->l_req_mode ==
- lock->l_granted_mode));
- LDLM_DEBUG(lock, "client-side enqueue waking up: granted");
- } else if (flags == LDLM_FL_WAIT_NOREPROC) {
- wait_event(lock->l_waitq, (lock->l_req_mode ==
- lock->l_granted_mode));
- } else if (flags == 0) {
+ if (flags == LDLM_FL_WAIT_NOREPROC)
+ goto noreproc;
+
+ if (!(flags & (LDLM_FL_BLOCK_WAIT | LDLM_FL_BLOCK_GRANTED |
+ LDLM_FL_BLOCK_CONV))) {
wake_up(&lock->l_waitq);
+ RETURN(0);
+ }
+
+ LDLM_DEBUG(lock, "client-side enqueue returned a blocked lock, "
+ "sleeping");
+ ldlm_lock_dump(D_OTHER, lock, 0);
+ ldlm_reprocess_all(lock->l_resource);
+
+noreproc:
+
+ obd = class_exp2obd(lock->l_conn_export);
+
+ /* if this is a local lock, then there is no import */
+ if (obd != NULL)
+ imp = obd->u.cli.cl_import;
+
+ lwd.lwd_lock = lock;
+
+ if (flags & LDLM_FL_NO_TIMEOUT) {
+ LDLM_DEBUG(lock, "waiting indefinitely for group lock\n");
+ lwi = LWI_INTR(interrupted_completion_wait, &lwd);
+ } else {
+ lwi = LWI_TIMEOUT_INTR(obd_timeout * HZ,
+ ldlm_expired_completion_wait,
+ interrupted_completion_wait, &lwd);
+ }
+
+ if (imp != NULL) {
+ spin_lock_irqsave(&imp->imp_lock, irqflags);
+ lwd.lwd_generation = imp->imp_generation;
+ spin_unlock_irqrestore(&imp->imp_lock, irqflags);
+ }
+
+ /* Go to sleep until the lock is granted or cancelled. */
+ rc = l_wait_event(lock->l_waitq,
+ ((lock->l_req_mode == lock->l_granted_mode) ||
+ (lock->l_flags & LDLM_FL_FAILED)), &lwi);
+
+ if (lock->l_destroyed || lock->l_flags & LDLM_FL_FAILED) {
+ LDLM_DEBUG(lock, "client-side enqueue waking up: destroyed");
+ RETURN(-EIO);
+ }
+
+ if (rc) {
+ LDLM_DEBUG(lock, "client-side enqueue waking up: failed (%d)",
+ rc);
+ RETURN(rc);
}
+ LDLM_DEBUG(lock, "client-side enqueue waking up: granted");
RETURN(0);
}
static int ldlm_cli_enqueue_local(struct ldlm_namespace *ns,
- struct lustre_handle *parent_lockh,
- __u64 *res_id,
+ struct ldlm_res_id res_id,
__u32 type,
- void *cookie, int cookielen,
+ ldlm_policy_data_t *policy,
ldlm_mode_t mode,
int *flags,
- ldlm_completion_callback completion,
ldlm_blocking_callback blocking,
- void *data,
- __u32 data_len,
+ ldlm_completion_callback completion,
+ ldlm_glimpse_callback glimpse,
+ void *data, __u32 lvb_len,
+ void *lvb_swabber,
struct lustre_handle *lockh)
{
struct ldlm_lock *lock;
int err;
+ ENTRY;
if (ns->ns_client) {
- CERROR("Trying to cancel local lock\n");
+ CERROR("Trying to enqueue local lock in a shadow namespace\n");
LBUG();
}
- lock = ldlm_lock_create(ns, parent_lockh, res_id, type, mode, data, data_len);
+ lock = ldlm_lock_create(ns, NULL, res_id, type, mode, blocking,
+ completion, glimpse, data, lvb_len);
if (!lock)
GOTO(out_nolock, err = -ENOMEM);
LDLM_DEBUG(lock, "client-side local enqueue handler, new lock created");
ldlm_lock_addref_internal(lock, mode);
ldlm_lock2handle(lock, lockh);
- lock->l_connh = NULL;
+ lock->l_flags |= LDLM_FL_LOCAL;
+ lock->l_lvb_swabber = lvb_swabber;
+ if (policy != NULL)
+ memcpy(&lock->l_policy_data, policy, sizeof(*policy));
+ if (type == LDLM_EXTENT)
+ memcpy(&lock->l_req_extent, &policy->l_extent,
+ sizeof(policy->l_extent));
- err = ldlm_lock_enqueue(lock, cookie, cookielen, flags, completion,
- blocking);
+ err = ldlm_lock_enqueue(ns, &lock, policy, flags);
if (err != ELDLM_OK)
GOTO(out, err);
- if (type == LDLM_EXTENT)
- memcpy(cookie, &lock->l_extent, sizeof(lock->l_extent));
+ if (policy != NULL)
+ memcpy(policy, &lock->l_policy_data, sizeof(*policy));
if ((*flags) & LDLM_FL_LOCK_CHANGED)
- memcpy(res_id, lock->l_resource->lr_name, sizeof(*res_id));
+ memcpy(&res_id, &lock->l_resource->lr_name, sizeof(res_id));
LDLM_DEBUG_NOLOCK("client-side local enqueue handler END (lock %p)",
lock);
if (lock->l_completion_ast)
- lock->l_completion_ast(lock, *flags);
+ lock->l_completion_ast(lock, *flags, NULL);
LDLM_DEBUG(lock, "client-side local enqueue END");
EXIT;
return err;
}
-int ldlm_cli_enqueue(struct lustre_handle *connh,
+static void failed_lock_cleanup(struct ldlm_namespace *ns,
+ struct ldlm_lock *lock,
+ struct lustre_handle *lockh, int mode)
+{
+ /* Set a flag to prevent us from sending a CANCEL (bug 407) */
+ l_lock(&ns->ns_lock);
+ lock->l_flags |= LDLM_FL_LOCAL_ONLY;
+ LDLM_DEBUG(lock, "setting FL_LOCAL_ONLY");
+ l_unlock(&ns->ns_lock);
+
+ ldlm_lock_decref_and_cancel(lockh, mode);
+}
+
+int ldlm_cli_enqueue(struct obd_export *exp,
struct ptlrpc_request *req,
struct ldlm_namespace *ns,
- struct lustre_handle *parent_lock_handle,
- __u64 *res_id,
+ struct ldlm_res_id res_id,
__u32 type,
- void *cookie, int cookielen,
+ ldlm_policy_data_t *policy,
ldlm_mode_t mode,
int *flags,
- ldlm_completion_callback completion,
ldlm_blocking_callback blocking,
+ ldlm_completion_callback completion,
+ ldlm_glimpse_callback glimpse,
void *data,
- __u32 data_len,
+ void *lvb,
+ __u32 lvb_len,
+ void *lvb_swabber,
struct lustre_handle *lockh)
{
struct ldlm_lock *lock;
struct ldlm_request *body;
struct ldlm_reply *reply;
- int rc, size = sizeof(*body), req_passed_in = 1;
+ int rc, size[2] = {sizeof(*body), lvb_len}, req_passed_in = 1;
+ int is_replay = *flags & LDLM_FL_REPLAY;
+ int cleanup_phase = 0;
ENTRY;
- if (connh == NULL)
- return ldlm_cli_enqueue_local(ns, parent_lock_handle, res_id,
- type, cookie, cookielen, mode,
- flags, completion, blocking, data,
- data_len, lockh);
+ if (exp == NULL) {
+ LASSERT(!is_replay);
+ rc = ldlm_cli_enqueue_local(ns, res_id, type, policy, mode,
+ flags, blocking, completion,
+ glimpse, data, lvb_len, lvb_swabber,
+ lockh);
+ RETURN(rc);
+ }
- *flags = 0;
- lock = ldlm_lock_create(ns, parent_lock_handle, res_id, type, mode,
- data, data_len);
- if (lock == NULL)
- GOTO(out_nolock, rc = -ENOMEM);
- LDLM_DEBUG(lock, "client-side enqueue START");
- /* for the local lock, add the reference */
- ldlm_lock_addref_internal(lock, mode);
- ldlm_lock2handle(lock, lockh);
+ /* If we're replaying this lock, just check some invariants.
+ * If we're creating a new lock, get everything all setup nice. */
+ if (is_replay) {
+ lock = ldlm_handle2lock(lockh);
+ LDLM_DEBUG(lock, "client-side enqueue START");
+ LASSERT(exp == lock->l_conn_export);
+ } else {
+ lock = ldlm_lock_create(ns, NULL, res_id, type, mode, blocking,
+ completion, glimpse, data, lvb_len);
+ if (lock == NULL)
+ RETURN(-ENOMEM);
+ /* for the local lock, add the reference */
+ ldlm_lock_addref_internal(lock, mode);
+ ldlm_lock2handle(lock, lockh);
+ lock->l_lvb_swabber = lvb_swabber;
+ if (policy != NULL)
+ memcpy(&lock->l_policy_data, policy, sizeof(*policy));
+ if (type == LDLM_EXTENT)
+ memcpy(&lock->l_req_extent, &policy->l_extent,
+ sizeof(policy->l_extent));
+ LDLM_DEBUG(lock, "client-side enqueue START");
+ }
+
+ /* lock not sent to server yet */
+ cleanup_phase = 2;
if (req == NULL) {
- req = ptlrpc_prep_req(class_conn2cliimp(connh), LDLM_ENQUEUE, 1,
- &size, NULL);
- if (!req)
- GOTO(out, rc = -ENOMEM);
+ req = ptlrpc_prep_req(class_exp2cliimp(exp), LDLM_ENQUEUE, 1,
+ size, NULL);
+ if (req == NULL)
+ GOTO(cleanup, rc = -ENOMEM);
req_passed_in = 0;
} else if (req->rq_reqmsg->buflens[0] != sizeof(*body))
LBUG();
- /* Dump all of this data into the request buffer */
- body = lustre_msg_buf(req->rq_reqmsg, 0);
+ /* Dump lock data into the request buffer */
+ body = lustre_msg_buf(req->rq_reqmsg, 0, sizeof (*body));
ldlm_lock2desc(lock, &body->lock_desc);
- /* Phil: make this part of ldlm_lock2desc */
- if (type == LDLM_EXTENT)
- memcpy(&body->lock_desc.l_extent, cookie,
- sizeof(body->lock_desc.l_extent));
body->lock_flags = *flags;
memcpy(&body->lock_handle1, lockh, sizeof(*lockh));
- if (parent_lock_handle)
- memcpy(&body->lock_handle2, parent_lock_handle,
- sizeof(body->lock_handle2));
/* Continue as normal. */
if (!req_passed_in) {
- size = sizeof(*reply);
- req->rq_replen = lustre_msg_size(1, &size);
+ int buffers = 1;
+ if (lvb_len > 0)
+ buffers = 2;
+ size[0] = sizeof(*reply);
+ req->rq_replen = lustre_msg_size(buffers, size);
}
- lock->l_connh = connh;
+ lock->l_conn_export = exp;
lock->l_export = NULL;
+ lock->l_blocking_ast = blocking;
+ LDLM_DEBUG(lock, "sending request");
rc = ptlrpc_queue_wait(req);
- /* FIXME: status check here? */
- rc = ptlrpc_check_status(req, rc);
if (rc != ELDLM_OK) {
+ LASSERT(!is_replay);
LDLM_DEBUG(lock, "client-side enqueue END (%s)",
rc == ELDLM_LOCK_ABORTED ? "ABORTED" : "FAILED");
- ldlm_lock_decref(lockh, mode);
- /* FIXME: if we've already received a completion AST, this will
- * LBUG! */
- ldlm_lock_destroy(lock);
- GOTO(out, rc);
+ if (rc == ELDLM_LOCK_ABORTED) {
+ /* Before we return, swab the reply */
+ reply = lustre_swab_repbuf(req, 0, sizeof(*reply),
+ lustre_swab_ldlm_reply);
+ if (reply == NULL) {
+ CERROR("Can't unpack ldlm_reply\n");
+ rc = -EPROTO;
+ }
+ if (lvb_len) {
+ void *tmplvb;
+ tmplvb = lustre_swab_repbuf(req, 1, lvb_len,
+ lvb_swabber);
+ if (tmplvb == NULL)
+ GOTO(cleanup, rc = -EPROTO);
+ if (lvb != NULL)
+ memcpy(lvb, tmplvb, lvb_len);
+ }
+ }
+ GOTO(cleanup, rc);
}
- reply = lustre_msg_buf(req->rq_repmsg, 0);
+ reply = lustre_swab_repbuf(req, 0, sizeof(*reply),
+ lustre_swab_ldlm_reply);
+ if (reply == NULL) {
+ CERROR("Can't unpack ldlm_reply\n");
+ GOTO(cleanup, rc = -EPROTO);
+ }
+
+ /* XXX - Phil, wasn't sure if this shoiuld go before or after the
+ /* lustre_swab_repbuf() ? If we can't unpack the reply then we
+ /* don't know what occurred on the server so I think the safest
+ /* bet is to cleanup the lock as if it didn't make it ? */
+
+ /* lock enqueued on the server */
+ cleanup_phase = 1;
+
memcpy(&lock->l_remote_handle, &reply->lock_handle,
sizeof(lock->l_remote_handle));
- if (type == LDLM_EXTENT)
- memcpy(cookie, &reply->lock_extent, sizeof(reply->lock_extent));
*flags = reply->lock_flags;
- CDEBUG(D_INFO, "remote handle: %p, flags: %d\n",
- (void *)(unsigned long)reply->lock_handle.addr, *flags);
- CDEBUG(D_INFO, "extent: %Lu -> %Lu\n",
- (unsigned long long)reply->lock_extent.start,
- (unsigned long long)reply->lock_extent.end);
+ CDEBUG(D_INFO, "local: %p, remote cookie: "LPX64", flags: 0x%x\n",
+ lock, reply->lock_handle.cookie, *flags);
/* If enqueue returned a blocked lock but the completion handler has
* already run, then it fixed up the resource and we don't need to do it
* again. */
if ((*flags) & LDLM_FL_LOCK_CHANGED) {
- int newmode = reply->lock_mode;
+ int newmode = reply->lock_desc.l_req_mode;
+ LASSERT(!is_replay);
if (newmode && newmode != lock->l_req_mode) {
LDLM_DEBUG(lock, "server returned different mode %s",
ldlm_lockname[newmode]);
lock->l_req_mode = newmode;
}
- if (reply->lock_resource_name[0] !=
- lock->l_resource->lr_name[0]) {
+ if (reply->lock_desc.l_resource.lr_name.name[0] !=
+ lock->l_resource->lr_name.name[0] ||
+ reply->lock_desc.l_resource.lr_name.name[1] !=
+ lock->l_resource->lr_name.name[1]) {
CDEBUG(D_INFO, "remote intent success, locking %ld "
"instead of %ld\n",
- (long)reply->lock_resource_name[0],
- (long)lock->l_resource->lr_name[0]);
+ (long)reply->lock_desc.l_resource.lr_name.name[0],
+ (long)lock->l_resource->lr_name.name[0]);
- ldlm_lock_change_resource(lock,
- reply->lock_resource_name);
+ ldlm_lock_change_resource(ns, lock,
+ reply->lock_desc.l_resource.lr_name);
if (lock->l_resource == NULL) {
LBUG();
- RETURN(-ENOMEM);
+ GOTO(cleanup, rc = -ENOMEM);
}
LDLM_DEBUG(lock, "client-side enqueue, new resource");
}
+ if (policy != NULL)
+ memcpy(&lock->l_policy_data,
+ &reply->lock_desc.l_policy_data,
+ sizeof(reply->lock_desc.l_policy_data));
+ if (type != LDLM_PLAIN)
+ LDLM_DEBUG(lock,"client-side enqueue, new policy data");
}
- if (!req_passed_in)
- ptlrpc_free_req(req);
+ if ((*flags) & LDLM_FL_AST_SENT) {
+ l_lock(&ns->ns_lock);
+ lock->l_flags |= LDLM_FL_CBPENDING;
+ l_unlock(&ns->ns_lock);
+ LDLM_DEBUG(lock, "enqueue reply includes blocking AST");
+ }
- rc = ldlm_lock_enqueue(lock, cookie, cookielen, flags, completion,
- blocking);
- if (lock->l_completion_ast)
- lock->l_completion_ast(lock, *flags);
+ /* If the lock has already been granted by a completion AST, don't
+ * clobber the LVB with an older one. */
+ if (lvb_len && (lock->l_req_mode != lock->l_granted_mode)) {
+ void *tmplvb;
+ tmplvb = lustre_swab_repbuf(req, 1, lvb_len, lvb_swabber);
+ if (tmplvb == NULL)
+ GOTO(cleanup, rc = -EPROTO);
+ memcpy(lock->l_lvb_data, tmplvb, lvb_len);
+ }
+
+ if (!is_replay) {
+ rc = ldlm_lock_enqueue(ns, &lock, NULL, flags);
+ if (lock->l_completion_ast != NULL) {
+ int err = lock->l_completion_ast(lock, *flags, NULL);
+ if (!rc)
+ rc = err;
+ }
+ }
+
+ if (lvb_len && lvb != NULL) {
+ /* Copy the LVB here, and not earlier, because the completion
+ * AST (if any) can override what we got in the reply */
+ memcpy(lvb, lock->l_lvb_data, lvb_len);
+ }
LDLM_DEBUG(lock, "client-side enqueue END");
EXIT;
- out:
+cleanup:
+ switch (cleanup_phase) {
+ case 2:
+ if (rc)
+ failed_lock_cleanup(ns, lock, lockh, mode);
+ case 1:
+ if (!req_passed_in && req != NULL)
+ ptlrpc_req_finished(req);
+ }
+
LDLM_LOCK_PUT(lock);
- out_nolock:
return rc;
}
-int ldlm_match_or_enqueue(struct lustre_handle *connh,
- struct ptlrpc_request *req,
- struct ldlm_namespace *ns,
- struct lustre_handle *parent_lock_handle,
- __u64 *res_id,
- __u32 type,
- void *cookie, int cookielen,
- ldlm_mode_t mode,
- int *flags,
- ldlm_completion_callback completion,
- ldlm_blocking_callback blocking,
- void *data,
- __u32 data_len,
- struct lustre_handle *lockh)
-{
- int rc;
- ENTRY;
- rc = ldlm_lock_match(ns, res_id, type, cookie, cookielen, mode, lockh);
- if (rc == 0) {
- rc = ldlm_cli_enqueue(connh, req, ns,
- parent_lock_handle, res_id, type, cookie,
- cookielen, mode, flags, completion,
- blocking, data, data_len, lockh);
- if (rc != ELDLM_OK)
- CERROR("ldlm_cli_enqueue: err: %d\n", rc);
- RETURN(rc);
- } else
- RETURN(0);
-}
-
static int ldlm_cli_convert_local(struct ldlm_lock *lock, int new_mode,
int *flags)
{
-
+ ENTRY;
if (lock->l_resource->lr_namespace->ns_client) {
CERROR("Trying to cancel local lock\n");
LBUG();
RETURN(0);
}
+/* FIXME: one of ldlm_cli_convert or the server side should reject attempted
+ * conversion of locks which are on the waiting or converting queue */
int ldlm_cli_convert(struct lustre_handle *lockh, int new_mode, int *flags)
{
struct ldlm_request *body;
- struct lustre_handle *connh;
struct ldlm_reply *reply;
struct ldlm_lock *lock;
struct ldlm_resource *res;
RETURN(-EINVAL);
}
*flags = 0;
- connh = lock->l_connh;
- if (!connh)
- return ldlm_cli_convert_local(lock, new_mode, flags);
+ if (lock->l_conn_export == NULL)
+ RETURN(ldlm_cli_convert_local(lock, new_mode, flags));
LDLM_DEBUG(lock, "client-side convert");
- req = ptlrpc_prep_req(class_conn2cliimp(connh), LDLM_CONVERT, 1, &size,
- NULL);
+ req = ptlrpc_prep_req(class_exp2cliimp(lock->l_conn_export),
+ LDLM_CONVERT, 1, &size, NULL);
if (!req)
GOTO(out, rc = -ENOMEM);
- body = lustre_msg_buf(req->rq_reqmsg, 0);
+ body = lustre_msg_buf(req->rq_reqmsg, 0, sizeof (*body));
memcpy(&body->lock_handle1, &lock->l_remote_handle,
sizeof(body->lock_handle1));
req->rq_replen = lustre_msg_size(1, &size);
rc = ptlrpc_queue_wait(req);
- rc = ptlrpc_check_status(req, rc);
if (rc != ELDLM_OK)
GOTO(out, rc);
- reply = lustre_msg_buf(req->rq_repmsg, 0);
+ reply = lustre_swab_repbuf(req, 0, sizeof (*reply),
+ lustre_swab_ldlm_reply);
+ if (reply == NULL) {
+ CERROR ("Can't unpack ldlm_reply\n");
+ GOTO (out, rc = -EPROTO);
+ }
+
res = ldlm_lock_convert(lock, new_mode, &reply->lock_flags);
if (res != NULL)
ldlm_reprocess_all(res);
/* Go to sleep until the lock is granted. */
/* FIXME: or cancelled. */
if (lock->l_completion_ast)
- lock->l_completion_ast(lock, LDLM_FL_WAIT_NOREPROC);
+ lock->l_completion_ast(lock, LDLM_FL_WAIT_NOREPROC, NULL);
EXIT;
out:
LDLM_LOCK_PUT(lock);
- ptlrpc_free_req(req);
+ ptlrpc_req_finished(req);
return rc;
}
int rc = 0, size = sizeof(*body);
ENTRY;
- lock = ldlm_handle2lock(lockh);
- if (!lock) {
- /* It's possible that the decref that we did just before this
- * cancel was the last reader/writer, and caused a cancel before
- * we could call this function. If we want to make this
- * impossible (by adding a dec_and_cancel() or similar), then
- * we can put the LBUG back. */
- //LBUG();
- RETURN(-EINVAL);
- }
+ /* concurrent cancels on the same handle can happen */
+ lock = __ldlm_handle2lock(lockh, LDLM_FL_CANCELING);
+ if (lock == NULL)
+ RETURN(0);
+
+ if (lock->l_conn_export) {
+ int local_only;
+ struct obd_import *imp;
- if (lock->l_connh) {
LDLM_DEBUG(lock, "client-side cancel");
/* Set this flag to prevent others from getting new references*/
l_lock(&lock->l_resource->lr_namespace->ns_lock);
lock->l_flags |= LDLM_FL_CBPENDING;
+ local_only = (lock->l_flags & LDLM_FL_LOCAL_ONLY);
l_unlock(&lock->l_resource->lr_namespace->ns_lock);
+ ldlm_cancel_callback(lock);
+
+ if (local_only) {
+ CDEBUG(D_INFO, "not sending request (at caller's "
+ "instruction)\n");
+ goto local_cancel;
+ }
+
+ restart:
+ imp = class_exp2cliimp(lock->l_conn_export);
+ if (imp == NULL || imp->imp_invalid) {
+ CDEBUG(D_HA, "skipping cancel on invalid import %p\n",
+ imp);
+ goto local_cancel;
+ }
- req = ptlrpc_prep_req(class_conn2cliimp(lock->l_connh),
- LDLM_CANCEL, 1, &size, NULL);
+ req = ptlrpc_prep_req(imp, LDLM_CANCEL, 1, &size, NULL);
if (!req)
GOTO(out, rc = -ENOMEM);
+ req->rq_no_resend = 1;
- body = lustre_msg_buf(req->rq_reqmsg, 0);
+ /* XXX FIXME bug 249 */
+ req->rq_request_portal = LDLM_CANCEL_REQUEST_PORTAL;
+ req->rq_reply_portal = LDLM_CANCEL_REPLY_PORTAL;
+
+ body = lustre_msg_buf(req->rq_reqmsg, 0, sizeof (*body));
memcpy(&body->lock_handle1, &lock->l_remote_handle,
sizeof(body->lock_handle1));
req->rq_replen = lustre_msg_size(0, NULL);
rc = ptlrpc_queue_wait(req);
- rc = ptlrpc_check_status(req, rc);
- ptlrpc_free_req(req);
- if (rc != ELDLM_OK)
- GOTO(out, rc);
+ if (rc == ESTALE) {
+ char str[PTL_NALFMT_SIZE];
+ CERROR("client/server (nid %s) out of sync"
+ " -- not fatal\n",
+ ptlrpc_peernid2str(&req->rq_import->
+ imp_connection->c_peer, str));
+ } else if (rc == -ETIMEDOUT) {
+ ptlrpc_req_finished(req);
+ GOTO(restart, rc);
+ } else if (rc != ELDLM_OK) {
+ CERROR("Got rc %d from cancel RPC: canceling "
+ "anyway\n", rc);
+ }
+
+ ptlrpc_req_finished(req);
+ local_cancel:
ldlm_lock_cancel(lock);
} else {
- LDLM_DEBUG(lock, "client-side local cancel");
if (lock->l_resource->lr_namespace->ns_client) {
- CERROR("Trying to cancel local lock\n");
+ LDLM_ERROR(lock, "Trying to cancel local lock\n");
LBUG();
}
+ LDLM_DEBUG(lock, "client-side local cancel");
ldlm_lock_cancel(lock);
ldlm_reprocess_all(lock->l_resource);
LDLM_DEBUG(lock, "client-side local cancel handler END");
return rc;
}
-/* Cancel all locks on a given resource that have 0 readers/writers */
-int ldlm_cli_cancel_unused(struct ldlm_namespace *ns, __u64 *res_id)
+/* when called with LDLM_ASYNC the blocking callback will be handled
+ * in a thread and this function will return after the thread has been
+ * asked to call the callback. when called with LDLM_SYNC the blocking
+ * callback will be performed in this function. */
+int ldlm_cancel_lru(struct ldlm_namespace *ns, ldlm_sync_t sync)
+{
+ struct list_head *tmp, *next;
+ struct ldlm_lock *lock;
+ int count, rc = 0;
+ LIST_HEAD(cblist);
+ ENTRY;
+
+ l_lock(&ns->ns_lock);
+ count = ns->ns_nr_unused - ns->ns_max_unused;
+
+ if (count <= 0) {
+ l_unlock(&ns->ns_lock);
+ RETURN(0);
+ }
+
+ list_for_each_safe(tmp, next, &ns->ns_unused_list) {
+
+ lock = list_entry(tmp, struct ldlm_lock, l_lru);
+
+ LASSERT(!lock->l_readers && !lock->l_writers);
+
+ /* Setting the CBPENDING flag is a little misleading, but
+ * prevents an important race; namely, once CBPENDING is set,
+ * the lock can accumulate no more readers/writers. Since
+ * readers and writers are already zero here, ldlm_lock_decref
+ * won't see this flag and call l_blocking_ast */
+ lock->l_flags |= LDLM_FL_CBPENDING;
+
+ LDLM_LOCK_GET(lock); /* dropped by bl thread */
+ ldlm_lock_remove_from_lru(lock);
+ if (sync == LDLM_ASYNC)
+ ldlm_bl_to_thread(ns, NULL, lock);
+ else
+ list_add(&lock->l_lru, &cblist);
+
+ if (--count == 0)
+ break;
+ }
+ l_unlock(&ns->ns_lock);
+
+ list_for_each_safe(tmp, next, &cblist) {
+ lock = list_entry(tmp, struct ldlm_lock, l_lru);
+ list_del_init(&lock->l_lru);
+ ldlm_handle_bl_callback(ns, NULL, lock);
+ }
+ RETURN(rc);
+}
+
+static int ldlm_cli_cancel_unused_resource(struct ldlm_namespace *ns,
+ struct ldlm_res_id res_id, int flags,
+ void *opaque)
{
struct ldlm_resource *res;
struct list_head *tmp, *next, list = LIST_HEAD_INIT(list);
ENTRY;
res = ldlm_resource_get(ns, NULL, res_id, 0, 0);
- if (res == NULL)
- RETURN(-EINVAL);
+ if (res == NULL) {
+ /* This is not a problem. */
+ CDEBUG(D_INFO, "No resource "LPU64"\n", res_id.name[0]);
+ RETURN(0);
+ }
l_lock(&ns->ns_lock);
list_for_each(tmp, &res->lr_granted) {
struct ldlm_lock *lock;
lock = list_entry(tmp, struct ldlm_lock, l_res_link);
- if (lock->l_readers || lock->l_writers)
+ if (opaque != NULL && lock->l_ast_data != opaque) {
+ LDLM_ERROR(lock, "data %p doesn't match opaque %p",
+ lock->l_ast_data, opaque);
continue;
+ }
- /* Setting the CBPENDING flag is a little misleading, but
- * prevents an important race; namely, once CBPENDING is set,
- * the lock can accumulate no more readers/writers. Since
- * readers and writers are already zero here, ldlm_lock_decref
- * won't see this flag and call l_blocking_ast */
+ if (lock->l_readers || lock->l_writers) {
+ if (flags & LDLM_FL_CONFIG_CHANGE)
+ lock->l_flags |= LDLM_FL_CBPENDING;
+ else if (flags & LDLM_FL_WARN)
+ LDLM_ERROR(lock, "lock in use");
+ continue;
+ }
+
+ /* See CBPENDING comment in ldlm_cancel_lru */
lock->l_flags |= LDLM_FL_CBPENDING;
OBD_ALLOC(w, sizeof(*w));
LASSERT(w);
w->w_lock = LDLM_LOCK_GET(lock);
+
list_add(&w->w_list, &list);
}
l_unlock(&ns->ns_lock);
int rc;
w = list_entry(tmp, struct ldlm_ast_work, w_list);
- ldlm_lock2handle(w->w_lock, &lockh);
- rc = ldlm_cli_cancel(&lockh);
- if (rc != ELDLM_OK)
- CERROR("ldlm_cli_cancel: %d\n", rc);
-
- LDLM_LOCK_PUT(w->w_lock);
+ if (flags & LDLM_FL_LOCAL_ONLY) {
+ ldlm_lock_cancel(w->w_lock);
+ } else {
+ ldlm_lock2handle(w->w_lock, &lockh);
+ rc = ldlm_cli_cancel(&lockh);
+ if (rc != ELDLM_OK)
+ CERROR("ldlm_cli_cancel: %d\n", rc);
+ }
list_del(&w->w_list);
+ LDLM_LOCK_PUT(w->w_lock);
OBD_FREE(w, sizeof(*w));
}
- ldlm_resource_put(res);
+ ldlm_resource_putref(res);
RETURN(0);
}
+
+static inline int have_no_nsresource(struct ldlm_namespace *ns)
+{
+ int no_resource = 0;
+
+ spin_lock(&ns->ns_counter_lock);
+ if (ns->ns_resources == 0)
+ no_resource = 1;
+ spin_unlock(&ns->ns_counter_lock);
+
+ RETURN(no_resource);
+}
+
+/* Cancel all locks on a namespace (or a specific resource, if given)
+ * that have 0 readers/writers.
+ *
+ * If flags & LDLM_FL_LOCAL_ONLY, throw the locks away without trying
+ * to notify the server.
+ * If flags & LDLM_FL_NO_CALLBACK, don't run the cancel callback.
+ * If flags & LDLM_FL_WARN, print a warning if some locks are still in use.
+ * If flags & LDLM_FL_CONFIG_CHANGE, mark all locks as having a pending callback
+ */
+int ldlm_cli_cancel_unused(struct ldlm_namespace *ns,
+ struct ldlm_res_id *res_id, int flags, void *opaque)
+{
+ int i;
+ struct l_wait_info lwi = { 0 };
+ ENTRY;
+
+ if (ns == NULL)
+ RETURN(ELDLM_OK);
+
+ if (res_id)
+ RETURN(ldlm_cli_cancel_unused_resource(ns, *res_id, flags,
+ opaque));
+
+ l_lock(&ns->ns_lock);
+ for (i = 0; i < RES_HASH_SIZE; i++) {
+ struct list_head *tmp, *next;
+ list_for_each_safe(tmp, next, &(ns->ns_hash[i])) {
+ int rc;
+ struct ldlm_resource *res;
+ res = list_entry(tmp, struct ldlm_resource, lr_hash);
+ ldlm_resource_getref(res);
+ l_unlock(&ns->ns_lock);
+
+ rc = ldlm_cli_cancel_unused_resource(ns, res->lr_name,
+ flags, opaque);
+ if (rc)
+ CERROR("cancel_unused_res ("LPU64"): %d\n",
+ res->lr_name.name[0], rc);
+
+ l_lock(&ns->ns_lock);
+ next = tmp->next;
+ ldlm_resource_putref(res);
+ }
+ }
+ l_unlock(&ns->ns_lock);
+ if (flags & LDLM_FL_CONFIG_CHANGE)
+ l_wait_event(ns->ns_waitq, have_no_nsresource(ns), &lwi);
+
+ RETURN(ELDLM_OK);
+}
+
+/* Lock iterators. */
+
+int ldlm_resource_foreach(struct ldlm_resource *res, ldlm_iterator_t iter,
+ void *closure)
+{
+ struct list_head *tmp, *next;
+ struct ldlm_lock *lock;
+ int rc = LDLM_ITER_CONTINUE;
+ struct ldlm_namespace *ns = res->lr_namespace;
+
+ ENTRY;
+
+ if (!res)
+ RETURN(LDLM_ITER_CONTINUE);
+
+ l_lock(&ns->ns_lock);
+ list_for_each_safe(tmp, next, &res->lr_granted) {
+ lock = list_entry(tmp, struct ldlm_lock, l_res_link);
+
+ if (iter(lock, closure) == LDLM_ITER_STOP)
+ GOTO(out, rc = LDLM_ITER_STOP);
+ }
+
+ list_for_each_safe(tmp, next, &res->lr_converting) {
+ lock = list_entry(tmp, struct ldlm_lock, l_res_link);
+
+ if (iter(lock, closure) == LDLM_ITER_STOP)
+ GOTO(out, rc = LDLM_ITER_STOP);
+ }
+
+ list_for_each_safe(tmp, next, &res->lr_waiting) {
+ lock = list_entry(tmp, struct ldlm_lock, l_res_link);
+
+ if (iter(lock, closure) == LDLM_ITER_STOP)
+ GOTO(out, rc = LDLM_ITER_STOP);
+ }
+ out:
+ l_unlock(&ns->ns_lock);
+ RETURN(rc);
+}
+
+struct iter_helper_data {
+ ldlm_iterator_t iter;
+ void *closure;
+};
+
+static int ldlm_iter_helper(struct ldlm_lock *lock, void *closure)
+{
+ struct iter_helper_data *helper = closure;
+ return helper->iter(lock, helper->closure);
+}
+
+static int ldlm_res_iter_helper(struct ldlm_resource *res, void *closure)
+{
+ return ldlm_resource_foreach(res, ldlm_iter_helper, closure);
+}
+
+int ldlm_namespace_foreach(struct ldlm_namespace *ns, ldlm_iterator_t iter,
+ void *closure)
+{
+ struct iter_helper_data helper = { iter: iter, closure: closure };
+ return ldlm_namespace_foreach_res(ns, ldlm_res_iter_helper, &helper);
+}
+
+int ldlm_namespace_foreach_res(struct ldlm_namespace *ns,
+ ldlm_res_iterator_t iter, void *closure)
+{
+ int i, rc = LDLM_ITER_CONTINUE;
+
+ l_lock(&ns->ns_lock);
+ for (i = 0; i < RES_HASH_SIZE; i++) {
+ struct list_head *tmp, *next;
+ list_for_each_safe(tmp, next, &(ns->ns_hash[i])) {
+ struct ldlm_resource *res =
+ list_entry(tmp, struct ldlm_resource, lr_hash);
+
+ ldlm_resource_getref(res);
+ rc = iter(res, closure);
+ ldlm_resource_putref(res);
+ if (rc == LDLM_ITER_STOP)
+ GOTO(out, rc);
+ }
+ }
+ out:
+ l_unlock(&ns->ns_lock);
+ RETURN(rc);
+}
+
+/* non-blocking function to manipulate a lock whose cb_data is being put away.*/
+void ldlm_change_cbdata(struct ldlm_namespace *ns, struct ldlm_res_id *res_id,
+ ldlm_iterator_t iter, void *data)
+{
+ struct ldlm_resource *res;
+ ENTRY;
+
+ if (ns == NULL) {
+ CERROR("must pass in namespace");
+ LBUG();
+ }
+
+ res = ldlm_resource_get(ns, NULL, *res_id, 0, 0);
+ if (res == NULL) {
+ EXIT;
+ return;
+ }
+
+ l_lock(&ns->ns_lock);
+ ldlm_resource_foreach(res, iter, data);
+ l_unlock(&ns->ns_lock);
+ ldlm_resource_putref(res);
+ EXIT;
+}
+
+/* Lock replay */
+
+static int ldlm_chain_lock_for_replay(struct ldlm_lock *lock, void *closure)
+{
+ struct list_head *list = closure;
+
+ /* we use l_pending_chain here, because it's unused on clients. */
+ list_add(&lock->l_pending_chain, list);
+ return LDLM_ITER_CONTINUE;
+}
+
+static int replay_lock_interpret(struct ptlrpc_request *req,
+ void * data, int rc)
+{
+ struct ldlm_lock *lock;
+ struct ldlm_reply *reply;
+
+ atomic_dec(&req->rq_import->imp_replay_inflight);
+ if (rc != ELDLM_OK)
+ GOTO(out, rc);
+
+ lock = req->rq_async_args.pointer_arg[0];
+ LASSERT(lock != NULL);
+
+ reply = lustre_swab_repbuf(req, 0, sizeof (*reply),
+ lustre_swab_ldlm_reply);
+ if (reply == NULL) {
+ CERROR("Can't unpack ldlm_reply\n");
+ GOTO (out, rc = -EPROTO);
+ }
+
+ memcpy(&lock->l_remote_handle, &reply->lock_handle,
+ sizeof(lock->l_remote_handle));
+ LDLM_DEBUG(lock, "replayed lock:");
+ ptlrpc_import_recovery_state_machine(req->rq_import);
+ out:
+ RETURN(rc);
+}
+
+static int replay_one_lock(struct obd_import *imp, struct ldlm_lock *lock)
+{
+ struct ptlrpc_request *req;
+ struct ldlm_request *body;
+ struct ldlm_reply *reply;
+ int buffers = 1;
+ int size[2];
+ int flags;
+
+ /*
+ * If granted mode matches the requested mode, this lock is granted.
+ *
+ * If they differ, but we have a granted mode, then we were granted
+ * one mode and now want another: ergo, converting.
+ *
+ * If we haven't been granted anything and are on a resource list,
+ * then we're blocked/waiting.
+ *
+ * If we haven't been granted anything and we're NOT on a resource list,
+ * then we haven't got a reply yet and don't have a known disposition.
+ * This happens whenever a lock enqueue is the request that triggers
+ * recovery.
+ */
+ if (lock->l_granted_mode == lock->l_req_mode)
+ flags = LDLM_FL_REPLAY | LDLM_FL_BLOCK_GRANTED;
+ else if (lock->l_granted_mode)
+ flags = LDLM_FL_REPLAY | LDLM_FL_BLOCK_CONV;
+ else if (!list_empty(&lock->l_res_link))
+ flags = LDLM_FL_REPLAY | LDLM_FL_BLOCK_WAIT;
+ else
+ flags = LDLM_FL_REPLAY;
+
+ size[0] = sizeof(*body);
+ req = ptlrpc_prep_req(imp, LDLM_ENQUEUE, 1, size, NULL);
+ if (!req)
+ RETURN(-ENOMEM);
+
+ /* We're part of recovery, so don't wait for it. */
+ req->rq_send_state = LUSTRE_IMP_REPLAY_LOCKS;
+
+ body = lustre_msg_buf(req->rq_reqmsg, 0, sizeof (*body));
+ ldlm_lock2desc(lock, &body->lock_desc);
+ body->lock_flags = flags;
+
+ ldlm_lock2handle(lock, &body->lock_handle1);
+ size[0] = sizeof(*reply);
+ if (lock->l_lvb_len != 0) {
+ buffers = 2;
+ size[1] = lock->l_lvb_len;
+ }
+ req->rq_replen = lustre_msg_size(buffers, size);
+
+ LDLM_DEBUG(lock, "replaying lock:");
+
+ atomic_inc(&req->rq_import->imp_replay_inflight);
+ req->rq_async_args.pointer_arg[0] = lock;
+ req->rq_interpret_reply = replay_lock_interpret;
+ ptlrpcd_add_req(req);
+
+ RETURN(0);
+}
+
+int ldlm_replay_locks(struct obd_import *imp)
+{
+ struct ldlm_namespace *ns = imp->imp_obd->obd_namespace;
+ struct list_head list, *pos, *next;
+ struct ldlm_lock *lock;
+ int rc = 0;
+
+ ENTRY;
+ INIT_LIST_HEAD(&list);
+
+ LASSERT(atomic_read(&imp->imp_replay_inflight) == 0);
+ LASSERT(ns != NULL);
+
+ /* ensure this doesn't fall to 0 before all have been queued */
+ atomic_inc(&imp->imp_replay_inflight);
+
+ l_lock(&ns->ns_lock);
+ (void)ldlm_namespace_foreach(ns, ldlm_chain_lock_for_replay, &list);
+
+ list_for_each_safe(pos, next, &list) {
+ lock = list_entry(pos, struct ldlm_lock, l_pending_chain);
+ rc = replay_one_lock(imp, lock);
+ if (rc)
+ break; /* or try to do the rest? */
+ }
+ l_unlock(&ns->ns_lock);
+
+ atomic_dec(&imp->imp_replay_inflight);
+
+ RETURN(rc);
+}
git://git.whamcloud.com / fs / lustre-release.git / blobdiff