/* -*- 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 file is part of Lustre, http://www.lustre.org.
+ * This file is part of the Lustre file system, http://www.lustre.org
+ * Lustre is a trademark of 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.
+ * You may have signed or agreed to another license before downloading
+ * this software. If so, you are bound by the terms and conditions
+ * of that agreement, and the following does not apply to you. See the
+ * LICENSE file included with this distribution for more information.
*
- * 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.
+ * If you did not agree to a different license, then this copy of Lustre
+ * is open source 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.
*
- * 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.
+ * In either case, 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
+ * license text for more details.
*
*/
#define DEBUG_SUBSYSTEM S_RPC
+#ifndef __KERNEL__
+#include <errno.h>
+#include <signal.h>
+#include <liblustre.h>
+#endif
+
+#include <obd_support.h>
+#include <obd_class.h>
+#include <lustre_lib.h>
+#include <lustre_ha.h>
+#include <lustre_import.h>
+#include <lustre_req_layout.h>
-#include <linux/obd_support.h>
-#include <linux/obd_class.h>
-#include <linux/lustre_lib.h>
-#include <linux/lustre_ha.h>
-#include <linux/lustre_import.h>
+#include "ptlrpc_internal.h"
void ptlrpc_init_client(int req_portal, int rep_portal, char *name,
struct ptlrpc_client *cl)
cl->cli_name = name;
}
-__u8 *ptlrpc_req_to_uuid(struct ptlrpc_request *req)
-{
- return req->rq_connection->c_remote_uuid;
-}
-
-struct ptlrpc_connection *ptlrpc_uuid_to_connection(obd_uuid_t uuid)
+struct ptlrpc_connection *ptlrpc_uuid_to_connection(struct obd_uuid *uuid)
{
struct ptlrpc_connection *c;
- struct lustre_peer peer;
- int err;
+ lnet_nid_t self;
+ lnet_process_id_t peer;
+ int err;
- err = kportal_uuid_to_peer(uuid, &peer);
+ err = ptlrpc_uuid_to_peer(uuid, &peer, &self);
if (err != 0) {
- CERROR("cannot find peer %s!\n", uuid);
+ CERROR("cannot find peer %s!\n", uuid->uuid);
return NULL;
}
- c = ptlrpc_get_connection(&peer, uuid);
+ c = ptlrpc_get_connection(peer, self, uuid);
if (c) {
- memcpy(c->c_remote_uuid, uuid, sizeof(c->c_remote_uuid));
- c->c_epoch++;
+ memcpy(c->c_remote_uuid.uuid,
+ uuid->uuid, sizeof(c->c_remote_uuid.uuid));
}
- CDEBUG(D_INFO, "%s -> %p\n", uuid, c);
+ CDEBUG(D_INFO, "%s -> %p\n", uuid->uuid, c);
return c;
}
-void ptlrpc_readdress_connection(struct ptlrpc_connection *conn,obd_uuid_t uuid)
+void ptlrpc_readdress_connection(struct ptlrpc_connection *conn,
+ struct obd_uuid *uuid)
{
- struct lustre_peer peer;
- int err;
+ lnet_nid_t self;
+ lnet_process_id_t peer;
+ int err;
- err = kportal_uuid_to_peer(uuid, &peer);
+ err = ptlrpc_uuid_to_peer(uuid, &peer, &self);
if (err != 0) {
- CERROR("cannot find peer %s!\n", uuid);
+ CERROR("cannot find peer %s!\n", uuid->uuid);
return;
}
- memcpy(&conn->c_peer, &peer, sizeof(peer));
+ conn->c_peer = peer;
+ conn->c_self = self;
return;
}
-struct ptlrpc_bulk_desc *ptlrpc_prep_bulk(struct ptlrpc_connection *conn)
+static inline struct ptlrpc_bulk_desc *new_bulk(int npages, int type, int portal)
{
struct ptlrpc_bulk_desc *desc;
- OBD_ALLOC(desc, sizeof(*desc));
- if (desc != NULL) {
- desc->bd_connection = ptlrpc_connection_addref(conn);
- atomic_set(&desc->bd_refcount, 1);
- init_waitqueue_head(&desc->bd_waitq);
- INIT_LIST_HEAD(&desc->bd_page_list);
- INIT_LIST_HEAD(&desc->bd_set_chain);
- ptl_set_inv_handle(&desc->bd_md_h);
- ptl_set_inv_handle(&desc->bd_me_h);
- }
+ OBD_ALLOC(desc, offsetof (struct ptlrpc_bulk_desc, bd_iov[npages]));
+ if (!desc)
+ return NULL;
+
+ spin_lock_init(&desc->bd_lock);
+ cfs_waitq_init(&desc->bd_waitq);
+ desc->bd_max_iov = npages;
+ desc->bd_iov_count = 0;
+ desc->bd_md_h = LNET_INVALID_HANDLE;
+ desc->bd_portal = portal;
+ desc->bd_type = type;
return desc;
}
-int ptlrpc_bulk_error(struct ptlrpc_bulk_desc *desc)
+struct ptlrpc_bulk_desc *ptlrpc_prep_bulk_imp (struct ptlrpc_request *req,
+ int npages, int type, int portal)
{
- int rc = 0;
- if (desc->bd_flags & PTL_RPC_FL_TIMEOUT) {
- rc = (desc->bd_flags & PTL_RPC_FL_INTR ? -ERESTARTSYS :
- -ETIMEDOUT);
- }
- return rc;
+ struct obd_import *imp = req->rq_import;
+ struct ptlrpc_bulk_desc *desc;
+
+ ENTRY;
+ LASSERT(type == BULK_PUT_SINK || type == BULK_GET_SOURCE);
+ desc = new_bulk(npages, type, portal);
+ if (desc == NULL)
+ RETURN(NULL);
+
+ desc->bd_import_generation = req->rq_import_generation;
+ desc->bd_import = class_import_get(imp);
+ desc->bd_req = req;
+
+ desc->bd_cbid.cbid_fn = client_bulk_callback;
+ desc->bd_cbid.cbid_arg = desc;
+
+ /* This makes req own desc, and free it when she frees herself */
+ req->rq_bulk = desc;
+
+ return desc;
}
-struct ptlrpc_bulk_page *ptlrpc_prep_bulk_page(struct ptlrpc_bulk_desc *desc)
+struct ptlrpc_bulk_desc *ptlrpc_prep_bulk_exp(struct ptlrpc_request *req,
+ int npages, int type, int portal)
{
- struct ptlrpc_bulk_page *bulk;
+ struct obd_export *exp = req->rq_export;
+ struct ptlrpc_bulk_desc *desc;
- OBD_ALLOC(bulk, sizeof(*bulk));
- if (bulk != NULL) {
- bulk->bp_desc = desc;
- list_add_tail(&bulk->bp_link, &desc->bd_page_list);
- desc->bd_page_count++;
- }
- return bulk;
+ ENTRY;
+ LASSERT(type == BULK_PUT_SOURCE || type == BULK_GET_SINK);
+
+ desc = new_bulk(npages, type, portal);
+ if (desc == NULL)
+ RETURN(NULL);
+
+ desc->bd_export = class_export_get(exp);
+ desc->bd_req = req;
+
+ desc->bd_cbid.cbid_fn = server_bulk_callback;
+ desc->bd_cbid.cbid_arg = desc;
+
+ /* NB we don't assign rq_bulk here; server-side requests are
+ * re-used, and the handler frees the bulk desc explicitly. */
+
+ return desc;
+}
+
+void ptlrpc_prep_bulk_page(struct ptlrpc_bulk_desc *desc,
+ cfs_page_t *page, int pageoffset, int len)
+{
+ LASSERT(desc->bd_iov_count < desc->bd_max_iov);
+ LASSERT(page != NULL);
+ LASSERT(pageoffset >= 0);
+ LASSERT(len > 0);
+ LASSERT(pageoffset + len <= CFS_PAGE_SIZE);
+
+ desc->bd_nob += len;
+
+ ptlrpc_add_bulk_page(desc, page, pageoffset, len);
}
void ptlrpc_free_bulk(struct ptlrpc_bulk_desc *desc)
{
- struct list_head *tmp, *next;
ENTRY;
- if (desc == NULL) {
- EXIT;
+
+ LASSERT(desc != NULL);
+ LASSERT(desc->bd_iov_count != LI_POISON); /* not freed already */
+ LASSERT(!desc->bd_network_rw); /* network hands off or */
+ LASSERT((desc->bd_export != NULL) ^ (desc->bd_import != NULL));
+
+ sptlrpc_enc_pool_put_pages(desc);
+
+ if (desc->bd_export)
+ class_export_put(desc->bd_export);
+ else
+ class_import_put(desc->bd_import);
+
+ OBD_FREE(desc, offsetof(struct ptlrpc_bulk_desc,
+ bd_iov[desc->bd_max_iov]));
+ EXIT;
+}
+
+void ptlrpc_free_rq_pool(struct ptlrpc_request_pool *pool)
+{
+ struct list_head *l, *tmp;
+ struct ptlrpc_request *req;
+
+ if (!pool)
return;
+
+ list_for_each_safe(l, tmp, &pool->prp_req_list) {
+ req = list_entry(l, struct ptlrpc_request, rq_list);
+ list_del(&req->rq_list);
+ LASSERT(req->rq_reqbuf);
+ LASSERT(req->rq_reqbuf_len == pool->prp_rq_size);
+ OBD_FREE(req->rq_reqbuf, pool->prp_rq_size);
+ OBD_FREE(req, sizeof(*req));
}
+ OBD_FREE(pool, sizeof(*pool));
+}
+
+void ptlrpc_add_rqs_to_pool(struct ptlrpc_request_pool *pool, int num_rq)
+{
+ int i;
+ int size = 1;
+
+ while (size < pool->prp_rq_size + SPTLRPC_MAX_PAYLOAD)
+ size <<= 1;
+
+ LASSERTF(list_empty(&pool->prp_req_list) || size == pool->prp_rq_size,
+ "Trying to change pool size with nonempty pool "
+ "from %d to %d bytes\n", pool->prp_rq_size, size);
+
+ spin_lock(&pool->prp_lock);
+ pool->prp_rq_size = size;
+ for (i = 0; i < num_rq; i++) {
+ struct ptlrpc_request *req;
+ struct lustre_msg *msg;
+
+ spin_unlock(&pool->prp_lock);
+ OBD_ALLOC(req, sizeof(struct ptlrpc_request));
+ if (!req)
+ return;
+ OBD_ALLOC_GFP(msg, size, CFS_ALLOC_STD);
+ if (!msg) {
+ OBD_FREE(req, sizeof(struct ptlrpc_request));
+ return;
+ }
+ req->rq_reqbuf = msg;
+ req->rq_reqbuf_len = size;
+ req->rq_pool = pool;
+ spin_lock(&pool->prp_lock);
+ list_add_tail(&req->rq_list, &pool->prp_req_list);
+ }
+ spin_unlock(&pool->prp_lock);
+ return;
+}
+
+struct ptlrpc_request_pool *ptlrpc_init_rq_pool(int num_rq, int msgsize,
+ void (*populate_pool)(struct ptlrpc_request_pool *, int))
+{
+ struct ptlrpc_request_pool *pool;
+
+ OBD_ALLOC(pool, sizeof (struct ptlrpc_request_pool));
+ if (!pool)
+ return NULL;
+
+ /* Request next power of two for the allocation, because internally
+ kernel would do exactly this */
+
+ spin_lock_init(&pool->prp_lock);
+ CFS_INIT_LIST_HEAD(&pool->prp_req_list);
+ pool->prp_rq_size = msgsize;
+ pool->prp_populate = populate_pool;
- LASSERT(list_empty(&desc->bd_set_chain));
+ populate_pool(pool, num_rq);
- list_for_each_safe(tmp, next, &desc->bd_page_list) {
- struct ptlrpc_bulk_page *bulk;
- bulk = list_entry(tmp, struct ptlrpc_bulk_page, bp_link);
- ptlrpc_free_bulk_page(bulk);
+ if (list_empty(&pool->prp_req_list)) {
+ /* have not allocated a single request for the pool */
+ OBD_FREE(pool, sizeof (struct ptlrpc_request_pool));
+ pool = NULL;
}
+ return pool;
+}
- ptlrpc_put_connection(desc->bd_connection);
+static struct ptlrpc_request *ptlrpc_prep_req_from_pool(struct ptlrpc_request_pool *pool)
+{
+ struct ptlrpc_request *request;
+ struct lustre_msg *reqbuf;
- OBD_FREE(desc, sizeof(*desc));
- EXIT;
+ if (!pool)
+ return NULL;
+
+ spin_lock(&pool->prp_lock);
+
+ /* See if we have anything in a pool, and bail out if nothing,
+ * in writeout path, where this matters, this is safe to do, because
+ * nothing is lost in this case, and when some in-flight requests
+ * complete, this code will be called again. */
+ if (unlikely(list_empty(&pool->prp_req_list))) {
+ spin_unlock(&pool->prp_lock);
+ return NULL;
+ }
+
+ request = list_entry(pool->prp_req_list.next, struct ptlrpc_request,
+ rq_list);
+ list_del(&request->rq_list);
+ spin_unlock(&pool->prp_lock);
+
+ LASSERT(request->rq_reqbuf);
+ LASSERT(request->rq_pool);
+
+ reqbuf = request->rq_reqbuf;
+ memset(request, 0, sizeof(*request));
+ request->rq_reqbuf = reqbuf;
+ request->rq_reqbuf_len = pool->prp_rq_size;
+ request->rq_pool = pool;
+ return request;
}
-void ptlrpc_free_bulk_page(struct ptlrpc_bulk_page *bulk)
+static void __ptlrpc_free_req_to_pool(struct ptlrpc_request *request)
{
+ struct ptlrpc_request_pool *pool = request->rq_pool;
+
+ spin_lock(&pool->prp_lock);
+ LASSERT(list_empty(&request->rq_list));
+ list_add_tail(&request->rq_list, &pool->prp_req_list);
+ spin_unlock(&pool->prp_lock);
+}
+
+static int __ptlrpc_request_bufs_pack(struct ptlrpc_request *request,
+ __u32 version, int opcode,
+ int count, int *lengths, char **bufs,
+ struct ptlrpc_cli_ctx *ctx)
+{
+ struct obd_import *imp = request->rq_import;
+ int rc;
ENTRY;
- if (bulk == NULL) {
- EXIT;
- return;
+
+ if (unlikely(ctx))
+ request->rq_cli_ctx = sptlrpc_cli_ctx_get(ctx);
+ else {
+ rc = sptlrpc_req_get_ctx(request);
+ if (rc)
+ GOTO(out_free, rc);
}
- list_del(&bulk->bp_link);
- bulk->bp_desc->bd_page_count--;
- OBD_FREE(bulk, sizeof(*bulk));
- EXIT;
+ sptlrpc_req_set_flavor(request, opcode);
+
+ rc = lustre_pack_request(request, imp->imp_msg_magic, count,
+ lengths, bufs);
+ if (rc) {
+ LASSERT(!request->rq_pool);
+ GOTO(out_ctx, rc);
+ }
+
+ lustre_msg_add_version(request->rq_reqmsg, version);
+
+ if (imp->imp_server_timeout)
+ request->rq_timeout = obd_timeout / 2;
+ else
+ request->rq_timeout = obd_timeout;
+ request->rq_send_state = LUSTRE_IMP_FULL;
+ request->rq_type = PTL_RPC_MSG_REQUEST;
+ request->rq_export = NULL;
+
+ request->rq_req_cbid.cbid_fn = request_out_callback;
+ request->rq_req_cbid.cbid_arg = request;
+
+ request->rq_reply_cbid.cbid_fn = reply_in_callback;
+ request->rq_reply_cbid.cbid_arg = request;
+
+ request->rq_phase = RQ_PHASE_NEW;
+
+ /* XXX FIXME bug 249 */
+ request->rq_request_portal = imp->imp_client->cli_request_portal;
+ request->rq_reply_portal = imp->imp_client->cli_reply_portal;
+
+ spin_lock_init(&request->rq_lock);
+ CFS_INIT_LIST_HEAD(&request->rq_list);
+ CFS_INIT_LIST_HEAD(&request->rq_replay_list);
+ CFS_INIT_LIST_HEAD(&request->rq_mod_list);
+ CFS_INIT_LIST_HEAD(&request->rq_ctx_chain);
+ CFS_INIT_LIST_HEAD(&request->rq_set_chain);
+ CFS_INIT_LIST_HEAD(&request->rq_history_list);
+ cfs_waitq_init(&request->rq_reply_waitq);
+ request->rq_xid = ptlrpc_next_xid();
+ atomic_set(&request->rq_refcount, 1);
+
+ lustre_msg_set_opc(request->rq_reqmsg, opcode);
+ lustre_msg_set_flags(request->rq_reqmsg, 0);
+
+ RETURN(0);
+out_ctx:
+ sptlrpc_cli_ctx_put(request->rq_cli_ctx, 1);
+out_free:
+ class_import_put(imp);
+ return rc;
+}
+
+int ptlrpc_request_bufs_pack(struct ptlrpc_request *request,
+ __u32 version, int opcode, char **bufs,
+ struct ptlrpc_cli_ctx *ctx)
+{
+ int count;
+
+ count = req_capsule_filled_sizes(&request->rq_pill, RCL_CLIENT);
+ return __ptlrpc_request_bufs_pack(request, version, opcode, count,
+ request->rq_pill.rc_area[RCL_CLIENT],
+ bufs, ctx);
+}
+EXPORT_SYMBOL(ptlrpc_request_bufs_pack);
+
+int ptlrpc_request_pack(struct ptlrpc_request *request,
+ __u32 version, int opcode)
+{
+ return ptlrpc_request_bufs_pack(request, version, opcode, NULL, NULL);
+}
+
+static inline
+struct ptlrpc_request *__ptlrpc_request_alloc(struct obd_import *imp,
+ struct ptlrpc_request_pool *pool)
+{
+ struct ptlrpc_request *request = NULL;
+
+ if (pool)
+ request = ptlrpc_prep_req_from_pool(pool);
+
+ if (!request)
+ OBD_ALLOC_PTR(request);
+
+ if (request) {
+ LASSERT((unsigned long)imp > 0x1000);
+ LASSERT(imp != LP_POISON);
+ LASSERT((unsigned long)imp->imp_client > 0x1000);
+ LASSERT(imp->imp_client != LP_POISON);
+
+ request->rq_import = class_import_get(imp);
+ } else {
+ CERROR("request allocation out of memory\n");
+ }
+
+ return request;
}
-static int ll_sync_brw_timeout(void *data)
+static struct ptlrpc_request *
+ptlrpc_request_alloc_internal(struct obd_import *imp,
+ struct ptlrpc_request_pool * pool,
+ const struct req_format *format)
+{
+ struct ptlrpc_request *request;
+
+ request = __ptlrpc_request_alloc(imp, pool);
+ if (request == NULL)
+ return NULL;
+
+ req_capsule_init(&request->rq_pill, request, RCL_CLIENT);
+ req_capsule_set(&request->rq_pill, format);
+ return request;
+}
+
+struct ptlrpc_request *ptlrpc_request_alloc(struct obd_import *imp,
+ const struct req_format *format)
+{
+ return ptlrpc_request_alloc_internal(imp, NULL, format);
+}
+
+struct ptlrpc_request *ptlrpc_request_alloc_pool(struct obd_import *imp,
+ struct ptlrpc_request_pool * pool,
+ const struct req_format *format)
+{
+ return ptlrpc_request_alloc_internal(imp, pool, format);
+}
+
+void ptlrpc_request_free(struct ptlrpc_request *request)
+{
+ if (request->rq_pool)
+ __ptlrpc_free_req_to_pool(request);
+ else
+ OBD_FREE_PTR(request);
+}
+
+struct ptlrpc_request *ptlrpc_request_alloc_pack(struct obd_import *imp,
+ const struct req_format *format,
+ __u32 version, int opcode)
+{
+ struct ptlrpc_request *req = ptlrpc_request_alloc(imp, format);
+ int rc;
+
+ if (req) {
+ rc = ptlrpc_request_pack(req, version, opcode);
+ if (rc) {
+ ptlrpc_request_free(req);
+ req = NULL;
+ }
+ }
+ return req;
+}
+
+struct ptlrpc_request *
+ptlrpc_prep_req_pool(struct obd_import *imp,
+ __u32 version, int opcode,
+ int count, int *lengths, char **bufs,
+ struct ptlrpc_request_pool *pool)
+{
+ struct ptlrpc_request *request;
+ int rc;
+
+ request = __ptlrpc_request_alloc(imp, pool);
+ if (!request)
+ return NULL;
+
+ rc = __ptlrpc_request_bufs_pack(request, version, opcode, count,
+ lengths, bufs, NULL);
+ if (rc) {
+ ptlrpc_request_free(request);
+ request = NULL;
+ }
+ return request;
+}
+
+struct ptlrpc_request *
+ptlrpc_prep_req(struct obd_import *imp, __u32 version, int opcode, int count,
+ int *lengths, char **bufs)
+{
+ return ptlrpc_prep_req_pool(imp, version, opcode, count, lengths, bufs,
+ NULL);
+}
+
+struct ptlrpc_request_set *ptlrpc_prep_set(void)
+{
+ struct ptlrpc_request_set *set;
+
+ ENTRY;
+ OBD_ALLOC(set, sizeof *set);
+ if (!set)
+ RETURN(NULL);
+ CFS_INIT_LIST_HEAD(&set->set_requests);
+ cfs_waitq_init(&set->set_waitq);
+ set->set_remaining = 0;
+ spin_lock_init(&set->set_new_req_lock);
+ CFS_INIT_LIST_HEAD(&set->set_new_requests);
+ CFS_INIT_LIST_HEAD(&set->set_cblist);
+
+ RETURN(set);
+}
+
+/* Finish with this set; opposite of prep_set. */
+void ptlrpc_set_destroy(struct ptlrpc_request_set *set)
{
- struct obd_brw_set *set = data;
struct list_head *tmp;
- int failed = 0;
+ struct list_head *next;
+ int expected_phase;
+ int n = 0;
ENTRY;
- LASSERT(set);
+ /* Requests on the set should either all be completed, or all be new */
+ expected_phase = (set->set_remaining == 0) ?
+ RQ_PHASE_COMPLETE : RQ_PHASE_NEW;
+ list_for_each (tmp, &set->set_requests) {
+ struct ptlrpc_request *req =
+ list_entry(tmp, struct ptlrpc_request, rq_set_chain);
- set->brw_flags |= PTL_RPC_FL_TIMEOUT;
+ LASSERT(req->rq_phase == expected_phase);
+ n++;
+ }
- list_for_each(tmp, &set->brw_desc_head) {
- struct ptlrpc_bulk_desc *desc =
- list_entry(tmp, struct ptlrpc_bulk_desc, bd_set_chain);
+ LASSERT(set->set_remaining == 0 || set->set_remaining == n);
- /* Skip descriptors that were completed successfully. */
- if (desc->bd_flags & (PTL_BULK_FL_RCVD | PTL_BULK_FL_SENT))
- continue;
+ list_for_each_safe(tmp, next, &set->set_requests) {
+ struct ptlrpc_request *req =
+ list_entry(tmp, struct ptlrpc_request, rq_set_chain);
+ list_del_init(&req->rq_set_chain);
- LASSERT(desc->bd_connection);
+ LASSERT(req->rq_phase == expected_phase);
- /* If PtlMDUnlink succeeds, then it hasn't completed yet. If it
- * fails, the bulk finished _just_ in time (after the timeout
- * fired but before we got this far) and we'll let it live.
- */
- if (PtlMDUnlink(desc->bd_md_h) != 0) {
- CERROR("Near-miss on OST %s -- need to adjust "
- "obd_timeout?\n",
- desc->bd_connection->c_remote_uuid);
- continue;
- }
+ if (req->rq_phase == RQ_PHASE_NEW) {
- CERROR("IO of %d pages to/from %s:%d (conn %p) timed out\n",
- desc->bd_page_count, desc->bd_connection->c_remote_uuid,
- desc->bd_portal, desc->bd_connection);
+ if (req->rq_interpret_reply != NULL) {
+ int (*interpreter)(struct ptlrpc_request *,
+ void *, int) =
+ req->rq_interpret_reply;
- /* This one will "never" arrive, don't wait for it. */
- if (atomic_dec_and_test(&set->brw_refcount))
- wake_up(&set->brw_waitq);
+ /* higher level (i.e. LOV) failed;
+ * let the sub reqs clean up */
+ req->rq_status = -EBADR;
+ interpreter(req, &req->rq_async_args,
+ req->rq_status);
+ }
+ set->set_remaining--;
+ }
- if (class_signal_connection_failure)
- class_signal_connection_failure(desc->bd_connection);
- else
- failed = 1;
+ req->rq_set = NULL;
+ ptlrpc_req_finished (req);
}
- /* 0 = We go back to sleep, until we're resumed or interrupted */
- /* 1 = We can't be recovered, just abort the syscall with -ETIMEDOUT */
- RETURN(failed);
+ LASSERT(set->set_remaining == 0);
+
+ OBD_FREE(set, sizeof(*set));
+ EXIT;
+}
+
+int ptlrpc_set_add_cb(struct ptlrpc_request_set *set,
+ set_interpreter_func fn, void *data)
+{
+ struct ptlrpc_set_cbdata *cbdata;
+
+ OBD_ALLOC_PTR(cbdata);
+ if (cbdata == NULL)
+ RETURN(-ENOMEM);
+
+ cbdata->psc_interpret = fn;
+ cbdata->psc_data = data;
+ list_add_tail(&cbdata->psc_item, &set->set_cblist);
+
+ RETURN(0);
+}
+
+void ptlrpc_set_add_req(struct ptlrpc_request_set *set,
+ struct ptlrpc_request *req)
+{
+ /* The set takes over the caller's request reference */
+ list_add_tail(&req->rq_set_chain, &set->set_requests);
+ req->rq_set = set;
+ set->set_remaining++;
+
+ atomic_inc(&req->rq_import->imp_inflight);
}
-static int ll_sync_brw_intr(void *data)
+/* lock so many callers can add things, the context that owns the set
+ * is supposed to notice these and move them into the set proper. */
+void ptlrpc_set_add_new_req(struct ptlrpc_request_set *set,
+ struct ptlrpc_request *req)
{
- struct obd_brw_set *set = data;
+ spin_lock(&set->set_new_req_lock);
+ /* The set takes over the caller's request reference */
+ list_add_tail(&req->rq_set_chain, &set->set_new_requests);
+ req->rq_set = set;
+ spin_unlock(&set->set_new_req_lock);
+}
+/*
+ * Based on the current state of the import, determine if the request
+ * can be sent, is an error, or should be delayed.
+ *
+ * Returns true if this request should be delayed. If false, and
+ * *status is set, then the request can not be sent and *status is the
+ * error code. If false and status is 0, then request can be sent.
+ *
+ * The imp->imp_lock must be held.
+ */
+static int ptlrpc_import_delay_req(struct obd_import *imp,
+ struct ptlrpc_request *req, int *status)
+{
+ int delay = 0;
ENTRY;
- set->brw_flags |= PTL_RPC_FL_INTR;
- RETURN(1); /* ignored, as of this writing */
+
+ LASSERT (status != NULL);
+ *status = 0;
+
+ if (req->rq_ctx_init || req->rq_ctx_fini) {
+ /* always allow ctx init/fini rpc go through */
+ } else if (imp->imp_state == LUSTRE_IMP_NEW) {
+ DEBUG_REQ(D_ERROR, req, "Uninitialized import.");
+ *status = -EIO;
+ LBUG();
+ } else if (imp->imp_state == LUSTRE_IMP_CLOSED) {
+ DEBUG_REQ(D_ERROR, req, "IMP_CLOSED ");
+ *status = -EIO;
+ } else if (req->rq_send_state == LUSTRE_IMP_CONNECTING &&
+ imp->imp_state == LUSTRE_IMP_CONNECTING) {
+ /* allow CONNECT even if import is invalid */ ;
+ if (atomic_read(&imp->imp_inval_count) != 0) {
+ DEBUG_REQ(D_ERROR, req, "invalidate in flight");
+ *status = -EIO;
+ }
+
+ } else if ((imp->imp_invalid && (!imp->imp_recon_bk)) ||
+ imp->imp_obd->obd_no_recov) {
+ /* If the import has been invalidated (such as by an OST
+ * failure), and if the import(MGC) tried all of its connection
+ * list (Bug 13464), the request must fail with -ESHUTDOWN.
+ * This indicates the requests should be discarded; an -EIO
+ * may result in a resend of the request. */
+ if (!imp->imp_deactive)
+ DEBUG_REQ(D_ERROR, req, "IMP_INVALID");
+ *status = -ESHUTDOWN; /* bz 12940 */
+ } else if (req->rq_import_generation != imp->imp_generation) {
+ DEBUG_REQ(D_ERROR, req, "req wrong generation:");
+ *status = -EIO;
+ } else if (req->rq_send_state != imp->imp_state) {
+ /* invalidate in progress - any requests should be drop */
+ if (atomic_read(&imp->imp_inval_count) != 0) {
+ DEBUG_REQ(D_ERROR, req, "invalidate in flight");
+ *status = -EIO;
+ } else if (imp->imp_dlm_fake || req->rq_no_delay) {
+ *status = -EWOULDBLOCK;
+ } else {
+ delay = 1;
+ }
+ }
+
+ RETURN(delay);
}
-int ll_brw_sync_wait(struct obd_brw_set *set, int phase)
+static int ptlrpc_check_reply(struct ptlrpc_request *req)
{
- struct l_wait_info lwi;
- struct list_head *tmp, *next;
int rc = 0;
ENTRY;
- switch(phase) {
- case CB_PHASE_START:
- lwi = LWI_TIMEOUT_INTR(obd_timeout * HZ, ll_sync_brw_timeout,
- ll_sync_brw_intr, set);
- rc = l_wait_event(set->brw_waitq,
- atomic_read(&set->brw_refcount) == 0, &lwi);
-
- list_for_each_safe(tmp, next, &set->brw_desc_head) {
- struct ptlrpc_bulk_desc *desc =
- list_entry(tmp, struct ptlrpc_bulk_desc,
- bd_set_chain);
- list_del_init(&desc->bd_set_chain);
- ptlrpc_bulk_decref(desc);
+ /* serialise with network callback */
+ spin_lock(&req->rq_lock);
+
+ if (req->rq_replied)
+ GOTO(out, rc = 1);
+
+ if (req->rq_net_err && !req->rq_timedout) {
+ spin_unlock(&req->rq_lock);
+ rc = ptlrpc_expire_one_request(req);
+ spin_lock(&req->rq_lock);
+ GOTO(out, rc);
+ }
+
+ if (req->rq_err)
+ GOTO(out, rc = 1);
+
+ if (req->rq_resend)
+ GOTO(out, rc = 1);
+
+ if (req->rq_restart)
+ GOTO(out, rc = 1);
+ EXIT;
+ out:
+ spin_unlock(&req->rq_lock);
+ DEBUG_REQ(D_NET, req, "rc = %d for", rc);
+ return rc;
+}
+
+static int ptlrpc_check_status(struct ptlrpc_request *req)
+{
+ int err;
+ ENTRY;
+
+ err = lustre_msg_get_status(req->rq_repmsg);
+ if (lustre_msg_get_type(req->rq_repmsg) == PTL_RPC_MSG_ERR) {
+ struct obd_import *imp = req->rq_import;
+ __u32 opc = lustre_msg_get_opc(req->rq_reqmsg);
+ LCONSOLE_ERROR_MSG(0x011,"an error occurred while communicating"
+ " with %s. The %s operation failed with %d\n",
+ libcfs_nid2str(imp->imp_connection->c_peer.nid),
+ ll_opcode2str(opc), err);
+ RETURN(err < 0 ? err : -EINVAL);
+ }
+
+ if (err < 0) {
+ DEBUG_REQ(D_INFO, req, "status is %d", err);
+ } else if (err > 0) {
+ /* XXX: translate this error from net to host */
+ DEBUG_REQ(D_INFO, req, "status is %d", err);
+ }
+
+ RETURN(err);
+}
+
+static int after_reply(struct ptlrpc_request *req)
+{
+ struct obd_import *imp = req->rq_import;
+ struct obd_device *obd = req->rq_import->imp_obd;
+ int rc;
+ struct timeval work_start;
+ long timediff;
+ ENTRY;
+
+ LASSERT(!req->rq_receiving_reply);
+ LASSERT(obd);
+ LASSERT(req->rq_nob_received <= req->rq_repbuf_len);
+
+ /* NB Until this point, the whole of the incoming message,
+ * including buflens, status etc is in the sender's byte order. */
+
+ /* Clear reply swab mask; this is a new reply in sender's byte order */
+ req->rq_rep_swab_mask = 0;
+
+ rc = sptlrpc_cli_unwrap_reply(req);
+ if (rc) {
+ DEBUG_REQ(D_ERROR, req, "unwrap reply failed (%d):", rc);
+ RETURN(rc);
+ }
+
+ /* security layer unwrap might ask resend this request */
+ if (req->rq_resend)
+ RETURN(0);
+
+ rc = lustre_unpack_msg(req->rq_repmsg, req->rq_replen);
+ if (rc) {
+ DEBUG_REQ(D_ERROR, req, "unpack_rep failed: %d", rc);
+ RETURN(-EPROTO);
+ }
+
+ rc = lustre_unpack_rep_ptlrpc_body(req, MSG_PTLRPC_BODY_OFF);
+ if (rc) {
+ DEBUG_REQ(D_ERROR, req, "unpack ptlrpc body failed: %d", rc);
+ RETURN(-EPROTO);
+ }
+
+ do_gettimeofday(&work_start);
+ timediff = cfs_timeval_sub(&work_start, &req->rq_arrival_time, NULL);
+ if (obd->obd_svc_stats != NULL)
+ lprocfs_counter_add(obd->obd_svc_stats, PTLRPC_REQWAIT_CNTR,
+ timediff);
+
+ if (lustre_msg_get_type(req->rq_repmsg) != PTL_RPC_MSG_REPLY &&
+ lustre_msg_get_type(req->rq_repmsg) != PTL_RPC_MSG_ERR) {
+ DEBUG_REQ(D_ERROR, req, "invalid packet received (type=%u)",
+ lustre_msg_get_type(req->rq_repmsg));
+ RETURN(-EPROTO);
+ }
+
+ rc = ptlrpc_check_status(req);
+ imp->imp_connect_error = rc;
+
+ if (rc) {
+ /* Either we've been evicted, or the server has failed for
+ * some reason. Try to reconnect, and if that fails, punt to
+ * the upcall. */
+ if (ll_rpc_recoverable_error(rc)) {
+ if (req->rq_send_state != LUSTRE_IMP_FULL ||
+ imp->imp_obd->obd_no_recov || imp->imp_dlm_fake) {
+ RETURN(rc);
+ }
+ ptlrpc_request_handle_notconn(req);
+ RETURN(rc);
+ }
+ } else {
+ /* Let's look if server send slv. Do it only for RPC with
+ * rc == 0. */
+ if (imp->imp_obd->obd_namespace) {
+ /* Disconnect rpc is sent when namespace is already
+ * destroyed. Let's check this and will not try update
+ * pool. */
+ ldlm_cli_update_pool(req);
}
- break;
- case CB_PHASE_FINISH:
- if (atomic_dec_and_test(&set->brw_refcount))
- wake_up(&set->brw_waitq);
- break;
- default:
- LBUG();
+ }
+
+ /* Store transno in reqmsg for replay. */
+ req->rq_transno = lustre_msg_get_transno(req->rq_repmsg);
+ lustre_msg_set_transno(req->rq_reqmsg, req->rq_transno);
+
+ if (req->rq_import->imp_replayable) {
+ spin_lock(&imp->imp_lock);
+ /* no point in adding already-committed requests to the replay
+ * list, we will just remove them immediately. b=9829 */
+ if (req->rq_transno != 0 &&
+ (req->rq_transno >
+ lustre_msg_get_last_committed(req->rq_repmsg) ||
+ req->rq_replay))
+ ptlrpc_retain_replayable_request(req, imp);
+ else if (req->rq_commit_cb != NULL) {
+ spin_unlock(&imp->imp_lock);
+ req->rq_commit_cb(req);
+ spin_lock(&imp->imp_lock);
+ }
+
+ /* Replay-enabled imports return commit-status information. */
+ if (lustre_msg_get_last_committed(req->rq_repmsg)) {
+ imp->imp_peer_committed_transno =
+ lustre_msg_get_last_committed(req->rq_repmsg);
+ }
+ ptlrpc_free_committed(imp);
+ spin_unlock(&imp->imp_lock);
}
RETURN(rc);
}
-struct ptlrpc_request *ptlrpc_prep_req(struct obd_import *imp, int opcode,
- int count, int *lengths, char **bufs)
+static int ptlrpc_send_new_req(struct ptlrpc_request *req)
{
- struct ptlrpc_connection *conn = imp->imp_connection;
- struct ptlrpc_request *request;
+ struct obd_import *imp;
int rc;
ENTRY;
- OBD_ALLOC(request, sizeof(*request));
- if (!request) {
- CERROR("request allocation out of memory\n");
- RETURN(NULL);
+ LASSERT(req->rq_phase == RQ_PHASE_NEW);
+ if (req->rq_sent && (req->rq_sent > cfs_time_current_sec()))
+ RETURN (0);
+
+ req->rq_phase = RQ_PHASE_RPC;
+
+ imp = req->rq_import;
+ spin_lock(&imp->imp_lock);
+
+ req->rq_import_generation = imp->imp_generation;
+
+ if (ptlrpc_import_delay_req(imp, req, &rc)) {
+ spin_lock (&req->rq_lock);
+ req->rq_waiting = 1;
+ spin_unlock (&req->rq_lock);
+
+ DEBUG_REQ(D_HA, req, "req from PID %d waiting for recovery: "
+ "(%s != %s)",
+ lustre_msg_get_status(req->rq_reqmsg) ,
+ ptlrpc_import_state_name(req->rq_send_state),
+ ptlrpc_import_state_name(imp->imp_state));
+ LASSERT(list_empty (&req->rq_list));
+
+ list_add_tail(&req->rq_list, &imp->imp_delayed_list);
+ spin_unlock(&imp->imp_lock);
+ RETURN(0);
}
- rc = lustre_pack_msg(count, lengths, bufs,
- &request->rq_reqlen, &request->rq_reqmsg);
+ if (rc != 0) {
+ spin_unlock(&imp->imp_lock);
+ req->rq_status = rc;
+ req->rq_phase = RQ_PHASE_INTERPRET;
+ RETURN(rc);
+ }
+
+ /* XXX this is the same as ptlrpc_queue_wait */
+ LASSERT(list_empty(&req->rq_list));
+ list_add_tail(&req->rq_list, &imp->imp_sending_list);
+ spin_unlock(&imp->imp_lock);
+
+ lustre_msg_set_status(req->rq_reqmsg, cfs_curproc_pid());
+
+ rc = sptlrpc_req_refresh_ctx(req, -1);
if (rc) {
- CERROR("cannot pack request %d\n", rc);
- OBD_FREE(request, sizeof(*request));
- RETURN(NULL);
+ if (req->rq_err) {
+ req->rq_status = rc;
+ RETURN(1);
+ } else {
+ /* here begins timeout counting */
+ req->rq_sent = cfs_time_current_sec();
+ req->rq_wait_ctx = 1;
+ RETURN(0);
+ }
}
- request->rq_level = LUSTRE_CONN_FULL;
- request->rq_type = PTL_RPC_MSG_REQUEST;
- request->rq_import = imp;
+ CDEBUG(D_RPCTRACE, "Sending RPC pname:cluuid:pid:xid:nid:opc"
+ " %s:%s:%d:"LPU64":%s:%d\n", cfs_curproc_comm(),
+ imp->imp_obd->obd_uuid.uuid,
+ lustre_msg_get_status(req->rq_reqmsg), req->rq_xid,
+ libcfs_nid2str(imp->imp_connection->c_peer.nid),
+ lustre_msg_get_opc(req->rq_reqmsg));
- /* XXX FIXME bug 625069 */
- request->rq_request_portal = imp->imp_client->cli_request_portal;
- request->rq_reply_portal = imp->imp_client->cli_reply_portal;
+ rc = ptl_send_rpc(req, 0);
+ if (rc) {
+ DEBUG_REQ(D_HA, req, "send failed (%d); expect timeout", rc);
+ req->rq_net_err = 1;
+ RETURN(rc);
+ }
+ RETURN(0);
+}
+
+/* this sends any unsent RPCs in @set and returns TRUE if all are sent */
+int ptlrpc_check_set(struct ptlrpc_request_set *set)
+{
+ struct list_head *tmp;
+ int force_timer_recalc = 0;
+ ENTRY;
- request->rq_connection = ptlrpc_connection_addref(conn);
+ if (set->set_remaining == 0)
+ RETURN(1);
- INIT_LIST_HEAD(&request->rq_list);
- atomic_set(&request->rq_refcount, 1);
+ list_for_each(tmp, &set->set_requests) {
+ struct ptlrpc_request *req =
+ list_entry(tmp, struct ptlrpc_request, rq_set_chain);
+ struct obd_import *imp = req->rq_import;
+ int rc = 0;
+
+ if (req->rq_phase == RQ_PHASE_NEW &&
+ ptlrpc_send_new_req(req)) {
+ force_timer_recalc = 1;
+ }
+ /* delayed send - skip */
+ if (req->rq_phase == RQ_PHASE_NEW && req->rq_sent)
+ continue;
+
+ if (!(req->rq_phase == RQ_PHASE_RPC ||
+ req->rq_phase == RQ_PHASE_BULK ||
+ req->rq_phase == RQ_PHASE_INTERPRET ||
+ req->rq_phase == RQ_PHASE_COMPLETE)) {
+ DEBUG_REQ(D_ERROR, req, "bad phase %x", req->rq_phase);
+ LBUG();
+ }
+
+ if (req->rq_phase == RQ_PHASE_COMPLETE)
+ continue;
+
+ if (req->rq_phase == RQ_PHASE_INTERPRET)
+ GOTO(interpret, req->rq_status);
+
+ if (req->rq_net_err && !req->rq_timedout)
+ ptlrpc_expire_one_request(req);
+
+ if (req->rq_err) {
+ ptlrpc_unregister_reply(req);
+ req->rq_replied = 0;
+ if (req->rq_status == 0)
+ req->rq_status = -EIO;
+ req->rq_phase = RQ_PHASE_INTERPRET;
+
+ spin_lock(&imp->imp_lock);
+ list_del_init(&req->rq_list);
+ spin_unlock(&imp->imp_lock);
+
+ GOTO(interpret, req->rq_status);
+ }
+
+ /* ptlrpc_queue_wait->l_wait_event guarantees that rq_intr
+ * will only be set after rq_timedout, but the oig waiting
+ * path sets rq_intr irrespective of whether ptlrpcd has
+ * seen a timeout. our policy is to only interpret
+ * interrupted rpcs after they have timed out */
+ if (req->rq_intr && (req->rq_timedout || req->rq_waiting ||
+ req->rq_wait_ctx)) {
+ /* NB could be on delayed list */
+ ptlrpc_unregister_reply(req);
+ req->rq_status = -EINTR;
+ req->rq_phase = RQ_PHASE_INTERPRET;
+
+ spin_lock(&imp->imp_lock);
+ list_del_init(&req->rq_list);
+ spin_unlock(&imp->imp_lock);
+
+ GOTO(interpret, req->rq_status);
+ }
+
+ if (req->rq_phase == RQ_PHASE_RPC) {
+ if (req->rq_timedout || req->rq_resend ||
+ req->rq_waiting || req->rq_wait_ctx) {
+ int status;
+
+ /* rq_wait_ctx is only touched in ptlrpcd,
+ * no lock needed here.
+ */
+ if (req->rq_wait_ctx)
+ goto check_ctx;
+
+ ptlrpc_unregister_reply(req);
+
+ spin_lock(&imp->imp_lock);
+
+ if (ptlrpc_import_delay_req(imp, req, &status)){
+ spin_unlock(&imp->imp_lock);
+ continue;
+ }
+
+ list_del_init(&req->rq_list);
+ if (status != 0) {
+ req->rq_status = status;
+ req->rq_phase = RQ_PHASE_INTERPRET;
+ spin_unlock(&imp->imp_lock);
+ GOTO(interpret, req->rq_status);
+ }
+ if (req->rq_no_resend && !req->rq_wait_ctx) {
+ req->rq_status = -ENOTCONN;
+ req->rq_phase = RQ_PHASE_INTERPRET;
+ spin_unlock(&imp->imp_lock);
+ GOTO(interpret, req->rq_status);
+ }
+ list_add_tail(&req->rq_list,
+ &imp->imp_sending_list);
+
+ spin_unlock(&imp->imp_lock);
+
+ req->rq_waiting = 0;
+ if (req->rq_resend) {
+ lustre_msg_add_flags(req->rq_reqmsg,
+ MSG_RESENT);
+ if (req->rq_bulk) {
+ __u64 old_xid = req->rq_xid;
+
+ ptlrpc_unregister_bulk (req);
+
+ /* ensure previous bulk fails */
+ req->rq_xid = ptlrpc_next_xid();
+ CDEBUG(D_HA, "resend bulk "
+ "old x"LPU64
+ " new x"LPU64"\n",
+ old_xid, req->rq_xid);
+ }
+ }
+check_ctx:
+ status = sptlrpc_req_refresh_ctx(req, -1);
+ if (status) {
+ if (req->rq_err) {
+ req->rq_status = status;
+ force_timer_recalc = 1;
+ }
+ if (!req->rq_wait_ctx) {
+ /* begins timeout counting */
+ req->rq_sent = cfs_time_current_sec();
+ req->rq_wait_ctx = 1;
+ }
+ continue;
+ } else {
+ req->rq_sent = 0;
+ req->rq_wait_ctx = 0;
+ }
+
+ rc = ptl_send_rpc(req, 0);
+ if (rc) {
+ DEBUG_REQ(D_HA, req, "send failed (%d)",
+ rc);
+ force_timer_recalc = 1;
+ req->rq_net_err = 1;
+ }
+ /* need to reset the timeout */
+ force_timer_recalc = 1;
+ }
+
+ /* Still waiting for a reply? */
+ if (ptlrpc_client_receiving_reply(req))
+ continue;
+
+ /* Did we actually receive a reply? */
+ if (!ptlrpc_client_replied(req))
+ continue;
+
+ spin_lock(&imp->imp_lock);
+ list_del_init(&req->rq_list);
+ spin_unlock(&imp->imp_lock);
+
+ req->rq_status = after_reply(req);
+ if (req->rq_resend) {
+ /* Add this req to the delayed list so
+ it can be errored if the import is
+ evicted after recovery. */
+ spin_lock(&imp->imp_lock);
+ list_add_tail(&req->rq_list,
+ &imp->imp_delayed_list);
+ spin_unlock(&imp->imp_lock);
+ continue;
+ }
+
+ /* If there is no bulk associated with this request,
+ * then we're done and should let the interpreter
+ * process the reply. Similarly if the RPC returned
+ * an error, and therefore the bulk will never arrive.
+ */
+ if (req->rq_bulk == NULL || req->rq_status != 0) {
+ req->rq_phase = RQ_PHASE_INTERPRET;
+ GOTO(interpret, req->rq_status);
+ }
+
+ req->rq_phase = RQ_PHASE_BULK;
+ }
+
+ LASSERT(req->rq_phase == RQ_PHASE_BULK);
+ if (ptlrpc_bulk_active(req->rq_bulk))
+ continue;
+
+ if (!req->rq_bulk->bd_success) {
+ /* The RPC reply arrived OK, but the bulk screwed
+ * up! Dead wierd since the server told us the RPC
+ * was good after getting the REPLY for her GET or
+ * the ACK for her PUT. */
+ DEBUG_REQ(D_ERROR, req, "bulk transfer failed");
+ LBUG();
+ }
+
+ req->rq_phase = RQ_PHASE_INTERPRET;
+
+ interpret:
+ LASSERT(req->rq_phase == RQ_PHASE_INTERPRET);
+ LASSERT(!req->rq_receiving_reply);
+
+ ptlrpc_unregister_reply(req);
+ if (req->rq_bulk != NULL)
+ ptlrpc_unregister_bulk (req);
+
+ if (req->rq_interpret_reply != NULL) {
+ int (*interpreter)(struct ptlrpc_request *,void *,int) =
+ req->rq_interpret_reply;
+ req->rq_status = interpreter(req, &req->rq_async_args,
+ req->rq_status);
+ }
+ req->rq_phase = RQ_PHASE_COMPLETE;
+
+ CDEBUG(D_RPCTRACE, "Completed RPC pname:cluuid:pid:xid:nid:"
+ "opc %s:%s:%d:"LPU64":%s:%d\n", cfs_curproc_comm(),
+ imp->imp_obd->obd_uuid.uuid,
+ lustre_msg_get_status(req->rq_reqmsg), req->rq_xid,
+ libcfs_nid2str(imp->imp_connection->c_peer.nid),
+ lustre_msg_get_opc(req->rq_reqmsg));
+
+ atomic_dec(&imp->imp_inflight);
+ set->set_remaining--;
+ cfs_waitq_signal(&imp->imp_recovery_waitq);
+ }
+
+ /* If we hit an error, we want to recover promptly. */
+ RETURN(set->set_remaining == 0 || force_timer_recalc);
+}
+
+int ptlrpc_expire_one_request(struct ptlrpc_request *req)
+{
+ struct obd_import *imp = req->rq_import;
+ int rc = 0;
+ ENTRY;
+
+ DEBUG_REQ(D_ERROR|D_NETERROR, req, "%s (sent at %lu, "CFS_DURATION_T"s ago)",
+ req->rq_net_err ? "network error" : "timeout",
+ (long)req->rq_sent, cfs_time_current_sec() - req->rq_sent);
+
+ if (imp != NULL && obd_debug_peer_on_timeout)
+ LNetCtl(IOC_LIBCFS_DEBUG_PEER, &imp->imp_connection->c_peer);
+
+ spin_lock(&req->rq_lock);
+ req->rq_timedout = 1;
+ req->rq_wait_ctx = 0;
+ spin_unlock(&req->rq_lock);
+
+ ptlrpc_unregister_reply (req);
+
+ if (obd_dump_on_timeout)
+ libcfs_debug_dumplog();
+
+ if (req->rq_bulk != NULL)
+ ptlrpc_unregister_bulk (req);
+
+ if (imp == NULL) {
+ DEBUG_REQ(D_HA, req, "NULL import: already cleaned up?");
+ RETURN(1);
+ }
+
+ /* The DLM server doesn't want recovery run on its imports. */
+ if (imp->imp_dlm_fake)
+ RETURN(1);
+
+ /* If this request is for recovery or other primordial tasks,
+ * then error it out here. */
+ if (req->rq_ctx_init || req->rq_ctx_fini ||
+ req->rq_send_state != LUSTRE_IMP_FULL ||
+ imp->imp_obd->obd_no_recov) {
+ spin_lock(&req->rq_lock);
+ req->rq_status = -ETIMEDOUT;
+ req->rq_err = 1;
+ spin_unlock(&req->rq_lock);
+ RETURN(1);
+ }
+
+ /* if request can't be resend we can't wait answer after timeout */
+ if (req->rq_no_resend) {
+ DEBUG_REQ(D_RPCTRACE, req, "TIMEOUT-NORESEND:");
+ rc = 1;
+ }
+
+ ptlrpc_fail_import(imp, lustre_msg_get_conn_cnt(req->rq_reqmsg));
+
+ RETURN(rc);
+}
+
+int ptlrpc_expired_set(void *data)
+{
+ struct ptlrpc_request_set *set = data;
+ struct list_head *tmp;
+ time_t now = cfs_time_current_sec();
+ ENTRY;
+
+ LASSERT(set != NULL);
+
+ /* A timeout expired; see which reqs it applies to... */
+ list_for_each (tmp, &set->set_requests) {
+ struct ptlrpc_request *req =
+ list_entry(tmp, struct ptlrpc_request, rq_set_chain);
+
+ /* request in-flight? */
+ if (!((req->rq_phase == RQ_PHASE_RPC && !req->rq_waiting &&
+ !req->rq_resend) ||
+ (req->rq_phase == RQ_PHASE_BULK)))
+ continue;
+
+ if (req->rq_timedout || /* already dealt with */
+ req->rq_sent + req->rq_timeout > now) /* not expired */
+ continue;
+
+ /* deal with this guy */
+ ptlrpc_expire_one_request (req);
+ }
+
+ /* When waiting for a whole set, we always to break out of the
+ * sleep so we can recalculate the timeout, or enable interrupts
+ * iff everyone's timed out.
+ */
+ RETURN(1);
+}
+
+void ptlrpc_mark_interrupted(struct ptlrpc_request *req)
+{
+ spin_lock(&req->rq_lock);
+ req->rq_intr = 1;
+ spin_unlock(&req->rq_lock);
+}
+
+void ptlrpc_interrupted_set(void *data)
+{
+ struct ptlrpc_request_set *set = data;
+ struct list_head *tmp;
+
+ LASSERT(set != NULL);
+ CERROR("INTERRUPTED SET %p\n", set);
+
+ list_for_each(tmp, &set->set_requests) {
+ struct ptlrpc_request *req =
+ list_entry(tmp, struct ptlrpc_request, rq_set_chain);
+
+ if (req->rq_phase != RQ_PHASE_RPC)
+ continue;
+
+ ptlrpc_mark_interrupted(req);
+ }
+}
+
+int ptlrpc_set_next_timeout(struct ptlrpc_request_set *set)
+{
+ struct list_head *tmp;
+ time_t now = cfs_time_current_sec();
+ time_t deadline;
+ int timeout = 0;
+ struct ptlrpc_request *req;
+ ENTRY;
+
+ SIGNAL_MASK_ASSERT(); /* XXX BUG 1511 */
+
+ list_for_each(tmp, &set->set_requests) {
+ req = list_entry(tmp, struct ptlrpc_request, rq_set_chain);
+
+ /* request in-flight? */
+ if (!((req->rq_phase == RQ_PHASE_RPC && !req->rq_waiting) ||
+ (req->rq_phase == RQ_PHASE_BULK) ||
+ (req->rq_phase == RQ_PHASE_NEW)))
+ continue;
+
+ if (req->rq_timedout) /* already timed out */
+ continue;
+
+ if (req->rq_phase == RQ_PHASE_NEW)
+ deadline = req->rq_sent;
+ else
+ deadline = req->rq_sent + req->rq_timeout;
+
+ if (deadline <= now) /* actually expired already */
+ timeout = 1; /* ASAP */
+ else if (timeout == 0 || timeout > deadline - now)
+ timeout = deadline - now;
+ }
+ RETURN(timeout);
+}
+
+int ptlrpc_set_wait(struct ptlrpc_request_set *set)
+{
+ struct list_head *tmp;
+ struct ptlrpc_request *req;
+ struct l_wait_info lwi;
+ int rc, timeout;
+ ENTRY;
+
+ if (list_empty(&set->set_requests))
+ RETURN(0);
+
+ list_for_each(tmp, &set->set_requests) {
+ req = list_entry(tmp, struct ptlrpc_request, rq_set_chain);
+ if (req->rq_phase == RQ_PHASE_NEW)
+ (void)ptlrpc_send_new_req(req);
+ }
- spin_lock(&imp->imp_lock);
- request->rq_xid = HTON__u32(++imp->imp_last_xid);
- spin_unlock(&imp->imp_lock);
+ do {
+ timeout = ptlrpc_set_next_timeout(set);
+
+ /* wait until all complete, interrupted, or an in-flight
+ * req times out */
+ CDEBUG(D_RPCTRACE, "set %p going to sleep for %d seconds\n",
+ set, timeout);
+ lwi = LWI_TIMEOUT_INTR(cfs_time_seconds(timeout ? timeout : 1),
+ ptlrpc_expired_set,
+ ptlrpc_interrupted_set, set);
+ rc = l_wait_event(set->set_waitq, ptlrpc_check_set(set), &lwi);
+
+ LASSERT(rc == 0 || rc == -EINTR || rc == -ETIMEDOUT);
+
+ /* -EINTR => all requests have been flagged rq_intr so next
+ * check completes.
+ * -ETIMEOUTD => someone timed out. When all reqs have
+ * timed out, signals are enabled allowing completion with
+ * EINTR.
+ * I don't really care if we go once more round the loop in
+ * the error cases -eeb. */
+ } while (rc != 0 || set->set_remaining != 0);
+
+ LASSERT(set->set_remaining == 0);
+
+ rc = 0;
+ list_for_each(tmp, &set->set_requests) {
+ req = list_entry(tmp, struct ptlrpc_request, rq_set_chain);
+
+ LASSERT(req->rq_phase == RQ_PHASE_COMPLETE);
+ if (req->rq_status != 0)
+ rc = req->rq_status;
+ }
- request->rq_reqmsg->magic = PTLRPC_MSG_MAGIC;
- request->rq_reqmsg->version = PTLRPC_MSG_VERSION;
- request->rq_reqmsg->opc = HTON__u32(opcode);
- request->rq_reqmsg->flags = 0;
+ if (set->set_interpret != NULL) {
+ int (*interpreter)(struct ptlrpc_request_set *set,void *,int) =
+ set->set_interpret;
+ rc = interpreter (set, set->set_arg, rc);
+ } else {
+ struct ptlrpc_set_cbdata *cbdata, *n;
+ int err;
+
+ list_for_each_entry_safe(cbdata, n,
+ &set->set_cblist, psc_item) {
+ list_del_init(&cbdata->psc_item);
+ err = cbdata->psc_interpret(set, cbdata->psc_data, rc);
+ if (err && !rc)
+ rc = err;
+ OBD_FREE_PTR(cbdata);
+ }
+ }
- ptlrpc_hdl2req(request, &imp->imp_handle);
- RETURN(request);
+ RETURN(rc);
}
static void __ptlrpc_free_req(struct ptlrpc_request *request, int locked)
return;
}
- if (atomic_read(&request->rq_refcount) != 0) {
- CERROR("freeing request %p (%d->%s:%d) with refcount %d\n",
- request, request->rq_reqmsg->opc,
- request->rq_connection->c_remote_uuid,
- request->rq_import->imp_client->cli_request_portal,
- request->rq_refcount);
- /* LBUG(); */
- }
+ LASSERTF(!request->rq_receiving_reply, "req %p\n", request);
+ LASSERTF(request->rq_rqbd == NULL, "req %p\n",request);/* client-side */
+ LASSERTF(list_empty(&request->rq_list), "req %p\n", request);
+ LASSERTF(list_empty(&request->rq_set_chain), "req %p\n", request);
+ LASSERT(request->rq_cli_ctx);
- if (request->rq_repmsg != NULL) {
- OBD_FREE(request->rq_repmsg, request->rq_replen);
- request->rq_repmsg = NULL;
- request->rq_reply_md.start = NULL;
- }
- if (request->rq_reqmsg != NULL) {
- OBD_FREE(request->rq_reqmsg, request->rq_reqlen);
- request->rq_reqmsg = NULL;
- }
+ req_capsule_fini(&request->rq_pill);
- if (request->rq_import) {
+ /* We must take it off the imp_replay_list first. Otherwise, we'll set
+ * request->rq_reqmsg to NULL while osc_close is dereferencing it. */
+ if (request->rq_import != NULL) {
if (!locked)
spin_lock(&request->rq_import->imp_lock);
- list_del_init(&request->rq_list);
+ list_del_init(&request->rq_mod_list);
+ list_del_init(&request->rq_replay_list);
if (!locked)
spin_unlock(&request->rq_import->imp_lock);
}
+ LASSERTF(list_empty(&request->rq_replay_list), "req %p\n", request);
+
+ if (atomic_read(&request->rq_refcount) != 0) {
+ DEBUG_REQ(D_ERROR, request,
+ "freeing request with nonzero refcount");
+ LBUG();
+ }
- ptlrpc_put_connection(request->rq_connection);
- OBD_FREE(request, sizeof(*request));
+ if (request->rq_repbuf != NULL)
+ sptlrpc_cli_free_repbuf(request);
+ if (request->rq_export != NULL) {
+ class_export_put(request->rq_export);
+ request->rq_export = NULL;
+ }
+ if (request->rq_import != NULL) {
+ class_import_put(request->rq_import);
+ request->rq_import = NULL;
+ }
+ if (request->rq_bulk != NULL)
+ ptlrpc_free_bulk(request->rq_bulk);
+
+ if (request->rq_reqbuf != NULL || request->rq_clrbuf != NULL)
+ sptlrpc_cli_free_reqbuf(request);
+
+ sptlrpc_req_put_ctx(request, !locked);
+
+ if (request->rq_pool)
+ __ptlrpc_free_req_to_pool(request);
+ else
+ OBD_FREE(request, sizeof(*request));
EXIT;
}
__ptlrpc_free_req(request, 0);
}
+static int __ptlrpc_req_finished(struct ptlrpc_request *request, int locked);
+void ptlrpc_req_finished_with_imp_lock(struct ptlrpc_request *request)
+{
+ LASSERT_SPIN_LOCKED(&request->rq_import->imp_lock);
+ (void)__ptlrpc_req_finished(request, 1);
+}
+
static int __ptlrpc_req_finished(struct ptlrpc_request *request, int locked)
{
ENTRY;
if (request == NULL)
RETURN(1);
+ if (request == LP_POISON ||
+ request->rq_reqmsg == LP_POISON) {
+ CERROR("dereferencing freed request (bug 575)\n");
+ LBUG();
+ RETURN(1);
+ }
+
+ DEBUG_REQ(D_INFO, request, "refcount now %u",
+ atomic_read(&request->rq_refcount) - 1);
+
if (atomic_dec_and_test(&request->rq_refcount)) {
__ptlrpc_free_req(request, locked);
RETURN(1);
}
- DEBUG_REQ(D_INFO, request, "refcount now %u",
- atomic_read(&request->rq_refcount));
RETURN(0);
}
__ptlrpc_req_finished(request, 0);
}
-static int ptlrpc_check_reply(struct ptlrpc_request *req)
+__u64 ptlrpc_req_xid(struct ptlrpc_request *request)
{
- int rc = 0;
-
- ENTRY;
- if (req->rq_repmsg != NULL) {
- req->rq_transno = NTOH__u64(req->rq_repmsg->transno);
- req->rq_flags |= PTL_RPC_FL_REPLIED;
- GOTO(out, rc = 1);
- }
-
- if (req->rq_flags & PTL_RPC_FL_RESEND) {
- DEBUG_REQ(D_ERROR, req, "RESEND:");
- GOTO(out, rc = 1);
- }
-
- if (req->rq_flags & PTL_RPC_FL_ERR) {
- DEBUG_REQ(D_ERROR, req, "ABORTED:");
- GOTO(out, rc = 1);
- }
-
- if (req->rq_flags & PTL_RPC_FL_RESTART) {
- DEBUG_REQ(D_ERROR, req, "RESTART:");
- GOTO(out, rc = 1);
- }
- out:
- DEBUG_REQ(D_NET, req, "rc = %d for", rc);
- return rc;
+ return request->rq_xid;
}
+EXPORT_SYMBOL(ptlrpc_req_xid);
-static int ptlrpc_check_status(struct ptlrpc_request *req)
+/* Disengage the client's reply buffer from the network
+ * NB does _NOT_ unregister any client-side bulk.
+ * IDEMPOTENT, but _not_ safe against concurrent callers.
+ * The request owner (i.e. the thread doing the I/O) must call...
+ */
+void ptlrpc_unregister_reply (struct ptlrpc_request *request)
{
- int err;
- ENTRY;
+ int rc;
+ cfs_waitq_t *wq;
+ struct l_wait_info lwi;
- err = req->rq_repmsg->status;
- if (req->rq_repmsg->type == NTOH__u32(PTL_RPC_MSG_ERR)) {
- CERROR("req->rq_repmsg->type == PTL_RPC_MSG_ERR\n");
- RETURN(err ? err : -EINVAL);
- }
+ LASSERT(!in_interrupt ()); /* might sleep */
- if (err != 0) {
- if (err < 0)
- CDEBUG(D_INFO, "req->rq_repmsg->status is %d\n", err);
- else
- CDEBUG(D_INFO, "req->rq_repmsg->status is %d\n", err);
- }
+ if (!ptlrpc_client_receiving_reply(request))
+ return;
- RETURN(err);
-}
+ LNetMDUnlink (request->rq_reply_md_h);
-static void ptlrpc_cleanup_request_buf(struct ptlrpc_request *request)
-{
- OBD_FREE(request->rq_reqmsg, request->rq_reqlen);
- request->rq_reqmsg = NULL;
- request->rq_reqlen = 0;
-}
+ /* We have to l_wait_event() whatever the result, to give liblustre
+ * a chance to run reply_in_callback() */
-/* Abort this request and cleanup any resources associated with it. */
-static int ptlrpc_abort(struct ptlrpc_request *request)
-{
- /* First remove the ME for the reply; in theory, this means
- * that we can tear down the buffer safely. */
- PtlMEUnlink(request->rq_reply_me_h);
- OBD_FREE(request->rq_reply_md.start, request->rq_replen);
- request->rq_repmsg = NULL;
- request->rq_replen = 0;
- return 0;
+ if (request->rq_set != NULL)
+ wq = &request->rq_set->set_waitq;
+ else
+ wq = &request->rq_reply_waitq;
+
+ for (;;) {
+ /* Network access will complete in finite time but the HUGE
+ * timeout lets us CWARN for visibility of sluggish NALs */
+ lwi = LWI_TIMEOUT(cfs_time_seconds(300), NULL, NULL);
+ rc = l_wait_event (*wq, !ptlrpc_client_receiving_reply(request), &lwi);
+ if (rc == 0)
+ return;
+
+ LASSERT (rc == -ETIMEDOUT);
+ DEBUG_REQ(D_WARNING, request, "Unexpectedly long timeout");
+ }
}
/* caller must hold imp->imp_lock */
{
struct list_head *tmp, *saved;
struct ptlrpc_request *req;
+ struct ptlrpc_request *last_req = NULL; /* temporary fire escape */
+ ENTRY;
+
+ LASSERT(imp != NULL);
+
+ LASSERT_SPIN_LOCKED(&imp->imp_lock);
+
+
+ if (imp->imp_peer_committed_transno == imp->imp_last_transno_checked &&
+ imp->imp_generation == imp->imp_last_generation_checked) {
+ CDEBUG(D_RPCTRACE, "%s: skip recheck: last_committed "LPU64"\n",
+ imp->imp_obd->obd_name, imp->imp_peer_committed_transno);
+ return;
+ }
+
+ CDEBUG(D_RPCTRACE, "%s: committing for last_committed "LPU64" gen %d\n",
+ imp->imp_obd->obd_name, imp->imp_peer_committed_transno,
+ imp->imp_generation);
+ imp->imp_last_transno_checked = imp->imp_peer_committed_transno;
+ imp->imp_last_generation_checked = imp->imp_generation;
list_for_each_safe(tmp, saved, &imp->imp_replay_list) {
- req = list_entry(tmp, struct ptlrpc_request, rq_list);
+ req = list_entry(tmp, struct ptlrpc_request, rq_replay_list);
- if (req->rq_flags & PTL_RPC_FL_REPLAY) {
- DEBUG_REQ(D_HA, req, "keeping (FL_REPLAY)");
+ /* XXX ok to remove when 1357 resolved - rread 05/29/03 */
+ LASSERT(req != last_req);
+ last_req = req;
+
+ if (req->rq_import_generation < imp->imp_generation) {
+ DEBUG_REQ(D_RPCTRACE, req, "free request with old gen");
+ GOTO(free_req, 0);
+ }
+
+ if (req->rq_replay) {
+ DEBUG_REQ(D_RPCTRACE, req, "keeping (FL_REPLAY)");
continue;
}
/* not yet committed */
- if (req->rq_transno > imp->imp_peer_committed_transno)
+ if (req->rq_transno > imp->imp_peer_committed_transno) {
+ DEBUG_REQ(D_RPCTRACE, req, "stopping search");
break;
+ }
- DEBUG_REQ(D_HA, req, "committing (last_committed %Lu)",
+ DEBUG_REQ(D_RPCTRACE, req, "commit (last_committed "LPU64")",
imp->imp_peer_committed_transno);
+free_req:
+ spin_lock(&req->rq_lock);
+ req->rq_replay = 0;
+ spin_unlock(&req->rq_lock);
+ if (req->rq_commit_cb != NULL)
+ req->rq_commit_cb(req);
+ list_del_init(&req->rq_replay_list);
__ptlrpc_req_finished(req, 1);
}
void ptlrpc_cleanup_client(struct obd_import *imp)
{
- struct list_head *tmp, *saved;
- struct ptlrpc_request *req;
- struct ptlrpc_connection *conn = imp->imp_connection;
ENTRY;
-
- LASSERT(conn);
-
- spin_lock(&imp->imp_lock);
- list_for_each_safe(tmp, saved, &imp->imp_replay_list) {
- req = list_entry(tmp, struct ptlrpc_request, rq_list);
-
- /* XXX we should make sure that nobody's sleeping on these! */
- DEBUG_REQ(D_HA, req, "cleaning up from sending list");
- list_del_init(&req->rq_list);
- req->rq_import = NULL;
- __ptlrpc_req_finished(req, 0);
- }
- spin_unlock(&imp->imp_lock);
-
EXIT;
return;
}
-void ptlrpc_continue_req(struct ptlrpc_request *req)
-{
- ENTRY;
- DEBUG_REQ(D_HA, req, "continuing delayed request");
- req->rq_reqmsg->addr = req->rq_import->imp_handle.addr;
- req->rq_reqmsg->cookie = req->rq_import->imp_handle.cookie;
- wake_up(&req->rq_wait_for_rep);
- EXIT;
-}
-
void ptlrpc_resend_req(struct ptlrpc_request *req)
{
- ENTRY;
- DEBUG_REQ(D_HA, req, "resending");
- req->rq_reqmsg->addr = req->rq_import->imp_handle.addr;
- req->rq_reqmsg->cookie = req->rq_import->imp_handle.cookie;
+ DEBUG_REQ(D_HA, req, "going to resend");
+ lustre_msg_set_handle(req->rq_reqmsg, &(struct lustre_handle){ 0 });
req->rq_status = -EAGAIN;
- req->rq_level = LUSTRE_CONN_RECOVD;
- req->rq_flags |= PTL_RPC_FL_RESEND;
- req->rq_flags &= ~PTL_RPC_FL_TIMEOUT;
- wake_up(&req->rq_wait_for_rep);
- EXIT;
+
+ spin_lock(&req->rq_lock);
+ req->rq_resend = 1;
+ req->rq_net_err = 0;
+ req->rq_timedout = 0;
+ if (req->rq_bulk) {
+ __u64 old_xid = req->rq_xid;
+
+ /* ensure previous bulk fails */
+ req->rq_xid = ptlrpc_next_xid();
+ CDEBUG(D_HA, "resend bulk old x"LPU64" new x"LPU64"\n",
+ old_xid, req->rq_xid);
+ }
+ ptlrpc_wake_client_req(req);
+ spin_unlock(&req->rq_lock);
}
+/* XXX: this function and rq_status are currently unused */
void ptlrpc_restart_req(struct ptlrpc_request *req)
{
- ENTRY;
DEBUG_REQ(D_HA, req, "restarting (possibly-)completed request");
req->rq_status = -ERESTARTSYS;
- req->rq_flags |= PTL_RPC_FL_RESTART;
- req->rq_flags &= ~PTL_RPC_FL_TIMEOUT;
- wake_up(&req->rq_wait_for_rep);
- EXIT;
+
+ spin_lock(&req->rq_lock);
+ req->rq_restart = 1;
+ req->rq_timedout = 0;
+ ptlrpc_wake_client_req(req);
+ spin_unlock(&req->rq_lock);
}
static int expired_request(void *data)
{
struct ptlrpc_request *req = data;
-
ENTRY;
- if (!req) {
- CERROR("NULL req!");
- LBUG();
- RETURN(0);
- }
-
- DEBUG_REQ(D_ERROR, req, "timeout");
- req->rq_flags |= PTL_RPC_FL_TIMEOUT;
-
- if (!req->rq_import) {
- DEBUG_REQ(D_ERROR, req, "NULL import");
- LBUG();
- RETURN(0);
- }
- if (!req->rq_import->imp_connection) {
- DEBUG_REQ(D_ERROR, req, "NULL connection");
- LBUG();
- RETURN(0);
- }
-
- if (!req->rq_import->imp_connection->c_recovd_data.rd_recovd)
+ /* some failure can suspend regular timeouts */
+ if (ptlrpc_check_suspend())
RETURN(1);
- req->rq_timeout = 0;
- recovd_conn_fail(req->rq_import->imp_connection);
-
-#if 0
- /* If this request is for recovery or other primordial tasks,
- * don't go back to sleep.
- */
- if (req->rq_level < LUSTRE_CONN_FULL)
- RETURN(1);
-#endif
- RETURN(0);
+ RETURN(ptlrpc_expire_one_request(req));
}
-static int interrupted_request(void *data)
+static void interrupted_request(void *data)
{
struct ptlrpc_request *req = data;
+ DEBUG_REQ(D_HA, req, "request interrupted");
+ spin_lock(&req->rq_lock);
+ req->rq_intr = 1;
+ spin_unlock(&req->rq_lock);
+}
+
+struct ptlrpc_request *ptlrpc_request_addref(struct ptlrpc_request *req)
+{
ENTRY;
- req->rq_flags |= PTL_RPC_FL_INTR;
- RETURN(1); /* ignored, as of this writing */
+ atomic_inc(&req->rq_refcount);
+ RETURN(req);
}
-/* If the import has been invalidated (such as by an OST failure), the
- * request must fail with -EIO.
- *
- * Must be called with imp_lock held, will drop it if it returns -EIO.
- */
-#define EIO_IF_INVALID(req) \
-if (req->rq_import->imp_flags & IMP_INVALID) { \
- DEBUG_REQ(D_ERROR, req, "IMP_INVALID:"); \
- spin_unlock(&imp->imp_lock); \
- RETURN(-EIO); \
+void ptlrpc_retain_replayable_request(struct ptlrpc_request *req,
+ struct obd_import *imp)
+{
+ struct list_head *tmp;
+
+ LASSERT_SPIN_LOCKED(&imp->imp_lock);
+
+ /* clear this for new requests that were resent as well
+ as resent replayed requests. */
+ lustre_msg_clear_flags(req->rq_reqmsg, MSG_RESENT);
+
+ /* don't re-add requests that have been replayed */
+ if (!list_empty(&req->rq_replay_list))
+ return;
+
+ lustre_msg_add_flags(req->rq_reqmsg, MSG_REPLAY);
+
+ LASSERT(imp->imp_replayable);
+ /* Balanced in ptlrpc_free_committed, usually. */
+ ptlrpc_request_addref(req);
+ list_for_each_prev(tmp, &imp->imp_replay_list) {
+ struct ptlrpc_request *iter =
+ list_entry(tmp, struct ptlrpc_request, rq_replay_list);
+
+ /* We may have duplicate transnos if we create and then
+ * open a file, or for closes retained if to match creating
+ * opens, so use req->rq_xid as a secondary key.
+ * (See bugs 684, 685, and 428.)
+ * XXX no longer needed, but all opens need transnos!
+ */
+ if (iter->rq_transno > req->rq_transno)
+ continue;
+
+ if (iter->rq_transno == req->rq_transno) {
+ LASSERT(iter->rq_xid != req->rq_xid);
+ if (iter->rq_xid > req->rq_xid)
+ continue;
+ }
+
+ list_add(&req->rq_replay_list, &iter->rq_replay_list);
+ return;
+ }
+
+ list_add_tail(&req->rq_replay_list, &imp->imp_replay_list);
}
int ptlrpc_queue_wait(struct ptlrpc_request *req)
{
int rc = 0;
+ int brc;
struct l_wait_info lwi;
struct obd_import *imp = req->rq_import;
- struct ptlrpc_connection *conn = imp->imp_connection;
+ cfs_duration_t timeout = 0;
ENTRY;
- init_waitqueue_head(&req->rq_wait_for_rep);
+ LASSERT(req->rq_set == NULL);
+ LASSERT(!req->rq_receiving_reply);
+ atomic_inc(&imp->imp_inflight);
/* for distributed debugging */
- req->rq_reqmsg->status = HTON__u32(current->pid);
- CDEBUG(D_RPCTRACE, "Sending RPC pid:xid:nid:opc %d:"LPU64":%x:%d\n",
- NTOH__u32(req->rq_reqmsg->status), req->rq_xid,
- conn->c_peer.peer_nid, NTOH__u32(req->rq_reqmsg->opc));
+ lustre_msg_set_status(req->rq_reqmsg, cfs_curproc_pid());
+ LASSERT(imp->imp_obd != NULL);
+ CDEBUG(D_RPCTRACE, "Sending RPC pname:cluuid:pid:xid:nid:opc "
+ "%s:%s:%d:"LPU64":%s:%d\n", cfs_curproc_comm(),
+ imp->imp_obd->obd_uuid.uuid,
+ lustre_msg_get_status(req->rq_reqmsg), req->rq_xid,
+ libcfs_nid2str(imp->imp_connection->c_peer.nid),
+ lustre_msg_get_opc(req->rq_reqmsg));
+
+ /* Mark phase here for a little debug help */
+ req->rq_phase = RQ_PHASE_RPC;
- if (req->rq_level > imp->imp_level) {
- spin_lock(&imp->imp_lock);
- EIO_IF_INVALID(req);
+ spin_lock(&imp->imp_lock);
+ req->rq_import_generation = imp->imp_generation;
+restart:
+ if (ptlrpc_import_delay_req(imp, req, &rc)) {
list_del(&req->rq_list);
+
list_add_tail(&req->rq_list, &imp->imp_delayed_list);
spin_unlock(&imp->imp_lock);
- DEBUG_REQ(D_HA, req, "\"%s\" waiting for recovery: (%d < %d)",
- current->comm, req->rq_level, imp->imp_level);
- lwi = LWI_INTR(NULL, NULL);
- rc = l_wait_event(req->rq_wait_for_rep,
- (req->rq_level <= imp->imp_level) ||
- (req->rq_flags & PTL_RPC_FL_ERR), &lwi);
+ DEBUG_REQ(D_HA, req, "\"%s\" waiting for recovery: (%s != %s)",
+ cfs_curproc_comm(),
+ ptlrpc_import_state_name(req->rq_send_state),
+ ptlrpc_import_state_name(imp->imp_state));
+ lwi = LWI_INTR(interrupted_request, req);
+ rc = l_wait_event(req->rq_reply_waitq,
+ (req->rq_send_state == imp->imp_state ||
+ req->rq_err || req->rq_intr),
+ &lwi);
+ DEBUG_REQ(D_HA, req, "\"%s\" awake: (%s == %s or %d/%d == 1)",
+ cfs_curproc_comm(),
+ ptlrpc_import_state_name(imp->imp_state),
+ ptlrpc_import_state_name(req->rq_send_state),
+ req->rq_err, req->rq_intr);
spin_lock(&imp->imp_lock);
list_del_init(&req->rq_list);
+
+ if (req->rq_err) {
+ rc = -EIO;
+ }
+ else if (req->rq_intr) {
+ rc = -EINTR;
+ }
+ else if (req->rq_no_resend) {
+ spin_unlock(&imp->imp_lock);
+ GOTO(out, rc = -ETIMEDOUT);
+ }
+ else {
+ GOTO(restart, rc);
+ }
+ }
+
+ if (rc != 0) {
+ list_del_init(&req->rq_list);
spin_unlock(&imp->imp_lock);
+ req->rq_status = rc; // XXX this ok?
+ GOTO(out, rc);
+ }
- if (req->rq_flags & PTL_RPC_FL_ERR)
- RETURN(-EIO);
+ if (req->rq_resend) {
+ lustre_msg_add_flags(req->rq_reqmsg, MSG_RESENT);
- if (rc)
- RETURN(rc);
+ if (req->rq_bulk != NULL) {
+ ptlrpc_unregister_bulk (req);
+
+ /* bulk requests are supposed to be
+ * idempotent, so we are free to bump the xid
+ * here, which we need to do before
+ * registering the bulk again (bug 6371).
+ * print the old xid first for sanity.
+ */
+ DEBUG_REQ(D_HA, req, "bumping xid for bulk: ");
+ req->rq_xid = ptlrpc_next_xid();
+ }
- CERROR("process %d resumed\n", current->pid);
+ DEBUG_REQ(D_HA, req, "resending: ");
}
- resend:
- req->rq_timeout = obd_timeout;
- spin_lock(&imp->imp_lock);
- EIO_IF_INVALID(req);
+ /* XXX this is the same as ptlrpc_set_wait */
LASSERT(list_empty(&req->rq_list));
list_add_tail(&req->rq_list, &imp->imp_sending_list);
spin_unlock(&imp->imp_lock);
- rc = ptl_send_rpc(req);
+
+ rc = sptlrpc_req_refresh_ctx(req, 0);
+ if (rc) {
+ if (req->rq_err) {
+ /* we got fatal ctx refresh error, directly jump out
+ * thus we can pass back the actual error code.
+ */
+ spin_lock(&imp->imp_lock);
+ list_del_init(&req->rq_list);
+ spin_unlock(&imp->imp_lock);
+
+ CERROR("Failed to refresh ctx of req %p: %d\n", req, rc);
+ GOTO(out, rc);
+ }
+ /* simulating we got error during send rpc */
+ goto after_send;
+ }
+
+ rc = ptl_send_rpc(req, 0);
if (rc) {
- CDEBUG(D_HA, "error %d, opcode %d, need recovery\n", rc,
- req->rq_reqmsg->opc);
- /* sleep for a jiffy, then trigger recovery */
- lwi = LWI_TIMEOUT_INTR(1, expired_request,
- interrupted_request, req);
+ DEBUG_REQ(D_HA, req, "send failed (%d); recovering", rc);
+ timeout = CFS_TICK;
} else {
- DEBUG_REQ(D_NET, req, "-- sleeping");
- lwi = LWI_TIMEOUT_INTR(req->rq_timeout * HZ, expired_request,
- interrupted_request, req);
+ timeout = cfs_timeout_cap(cfs_time_seconds(req->rq_timeout));
+ DEBUG_REQ(D_NET, req,
+ "-- sleeping for "CFS_DURATION_T" jiffies", timeout);
}
- l_wait_event(req->rq_wait_for_rep, ptlrpc_check_reply(req), &lwi);
- DEBUG_REQ(D_NET, req, "-- done sleeping");
+repeat:
+ lwi = LWI_TIMEOUT_INTR(timeout, expired_request, interrupted_request,
+ req);
+ rc = l_wait_event(req->rq_reply_waitq, ptlrpc_check_reply(req), &lwi);
+ if (rc == -ETIMEDOUT && ptlrpc_check_and_wait_suspend(req))
+ goto repeat;
+
+after_send:
+ CDEBUG(D_RPCTRACE, "Completed RPC pname:cluuid:pid:xid:nid:opc "
+ "%s:%s:%d:"LPU64":%s:%d\n", cfs_curproc_comm(),
+ imp->imp_obd->obd_uuid.uuid,
+ lustre_msg_get_status(req->rq_reqmsg), req->rq_xid,
+ libcfs_nid2str(imp->imp_connection->c_peer.nid),
+ lustre_msg_get_opc(req->rq_reqmsg));
spin_lock(&imp->imp_lock);
list_del_init(&req->rq_list);
spin_unlock(&imp->imp_lock);
- if (req->rq_flags & PTL_RPC_FL_ERR) {
- ptlrpc_abort(req);
+ /* If the reply was received normally, this just grabs the spinlock
+ * (ensuring the reply callback has returned), sees that
+ * req->rq_receiving_reply is clear and returns. */
+ ptlrpc_unregister_reply (req);
+
+ if (req->rq_err)
GOTO(out, rc = -EIO);
- }
- /* Don't resend if we were interrupted. */
- if ((req->rq_flags & (PTL_RPC_FL_RESEND | PTL_RPC_FL_INTR)) ==
- PTL_RPC_FL_RESEND) {
- req->rq_flags &= ~PTL_RPC_FL_RESEND;
- DEBUG_REQ(D_HA, req, "resending: ");
- goto resend;
+ /* Resend if we need to, unless we were interrupted. */
+ if (req->rq_resend && !req->rq_intr) {
+ /* ...unless we were specifically told otherwise. */
+ if (req->rq_no_resend)
+ GOTO(out, rc = -ETIMEDOUT);
+ spin_lock(&imp->imp_lock);
+ goto restart;
}
- if (req->rq_flags & PTL_RPC_FL_INTR) {
- if (!(req->rq_flags & PTL_RPC_FL_TIMEOUT))
- LBUG(); /* should only be interrupted if we timed out */
- /* Clean up the dangling reply buffers */
- ptlrpc_abort(req);
+ if (req->rq_intr) {
+ /* Should only be interrupted if we timed out. */
+ if (!req->rq_timedout)
+ DEBUG_REQ(D_ERROR, req,
+ "rq_intr set but rq_timedout not");
GOTO(out, rc = -EINTR);
}
- if (req->rq_flags & PTL_RPC_FL_TIMEOUT)
+ if (req->rq_timedout) { /* non-recoverable timeout */
GOTO(out, rc = -ETIMEDOUT);
+ }
- if (!(req->rq_flags & PTL_RPC_FL_REPLIED))
+ if (!req->rq_replied) {
+ /* How can this be? -eeb */
+ DEBUG_REQ(D_ERROR, req, "!rq_replied: ");
+ LBUG();
GOTO(out, rc = req->rq_status);
+ }
- rc = lustre_unpack_msg(req->rq_repmsg, req->rq_replen);
- if (rc) {
- CERROR("unpack_rep failed: %d\n", rc);
- GOTO(out, rc);
+ rc = after_reply(req);
+ /* NB may return +ve success rc */
+ if (req->rq_resend) {
+ spin_lock(&imp->imp_lock);
+ goto restart;
}
-#if 0
- /* FIXME: Enable when BlueArc makes new release */
- if (req->rq_repmsg->type != PTL_RPC_MSG_REPLY &&
- req->rq_repmsg->type != PTL_RPC_MSG_ERR) {
- CERROR("invalid packet type received (type=%u)\n",
- req->rq_repmsg->type);
- LBUG();
- GOTO(out, rc = -EINVAL);
+
+ out:
+ if (req->rq_bulk != NULL) {
+ if (rc >= 0) {
+ /* success so far. Note that anything going wrong
+ * with bulk now, is EXTREMELY strange, since the
+ * server must have believed that the bulk
+ * tranferred OK before she replied with success to
+ * me. */
+ lwi = LWI_TIMEOUT(timeout, NULL, NULL);
+ brc = l_wait_event(req->rq_reply_waitq,
+ !ptlrpc_bulk_active(req->rq_bulk),
+ &lwi);
+ LASSERT(brc == 0 || brc == -ETIMEDOUT);
+ if (brc != 0) {
+ LASSERT(brc == -ETIMEDOUT);
+ DEBUG_REQ(D_ERROR, req, "bulk timed out");
+ rc = brc;
+ } else if (!req->rq_bulk->bd_success) {
+ DEBUG_REQ(D_ERROR, req, "bulk transfer failed");
+ rc = -EIO;
+ }
+ }
+ if (rc < 0)
+ ptlrpc_unregister_bulk (req);
}
-#endif
- CDEBUG(D_NET, "got rep "LPU64"\n", req->rq_xid);
- if (req->rq_repmsg->status == 0)
- CDEBUG(D_NET, "--> buf %p len %d status %d\n", req->rq_repmsg,
- req->rq_replen, req->rq_repmsg->status);
+ LASSERT(!req->rq_receiving_reply);
+ req->rq_phase = RQ_PHASE_INTERPRET;
- if (req->rq_import->imp_flags & IMP_REPLAYABLE) {
- spin_lock(&imp->imp_lock);
- if (req->rq_flags & PTL_RPC_FL_REPLAY || req->rq_transno != 0) {
- /* Balanced in ptlrpc_free_committed, usually. */
- atomic_inc(&req->rq_refcount);
- list_add_tail(&req->rq_list, &imp->imp_replay_list);
- }
+ atomic_dec(&imp->imp_inflight);
+ cfs_waitq_signal(&imp->imp_recovery_waitq);
+ RETURN(rc);
+}
- if (req->rq_transno > imp->imp_max_transno) {
- imp->imp_max_transno = req->rq_transno;
- } else if (req->rq_transno != 0 &&
- imp->imp_level == LUSTRE_CONN_FULL) {
- CERROR("got transno "LPD64" after "LPD64": recovery "
- "may not work\n", req->rq_transno,
- imp->imp_max_transno);
- }
+struct ptlrpc_replay_async_args {
+ int praa_old_state;
+ int praa_old_status;
+};
- /* Replay-enabled imports return commit-status information. */
- imp->imp_peer_last_xid = req->rq_repmsg->last_xid;
- imp->imp_peer_committed_transno =
- req->rq_repmsg->last_committed;
- spin_unlock(&imp->imp_lock);
- ptlrpc_free_committed(imp);
+static int ptlrpc_replay_interpret(struct ptlrpc_request *req,
+ void * data, int rc)
+{
+ struct ptlrpc_replay_async_args *aa = data;
+ struct obd_import *imp = req->rq_import;
+
+ ENTRY;
+ atomic_dec(&imp->imp_replay_inflight);
+
+ if (!req->rq_replied) {
+ CERROR("request replay timed out, restarting recovery\n");
+ GOTO(out, rc = -ETIMEDOUT);
}
- rc = ptlrpc_check_status(req);
+ if (lustre_msg_get_type(req->rq_repmsg) == PTL_RPC_MSG_ERR &&
+ (lustre_msg_get_status(req->rq_repmsg) == -ENOTCONN ||
+ lustre_msg_get_status(req->rq_repmsg) == -ENODEV))
+ GOTO(out, rc = lustre_msg_get_status(req->rq_repmsg));
- EXIT;
+ /* The transno had better not change over replay. */
+ LASSERT(lustre_msg_get_transno(req->rq_reqmsg) ==
+ lustre_msg_get_transno(req->rq_repmsg));
+
+ DEBUG_REQ(D_HA, req, "got rep");
+
+ /* let the callback do fixups, possibly including in the request */
+ if (req->rq_replay_cb)
+ req->rq_replay_cb(req);
+
+ if (req->rq_replied &&
+ lustre_msg_get_status(req->rq_repmsg) != aa->praa_old_status) {
+ DEBUG_REQ(D_ERROR, req, "status %d, old was %d",
+ lustre_msg_get_status(req->rq_repmsg),
+ aa->praa_old_status);
+ } else {
+ /* Put it back for re-replay. */
+ lustre_msg_set_status(req->rq_repmsg, aa->praa_old_status);
+ }
+
+ /*
+ * Errors while replay can set transno to 0, but
+ * imp_last_replay_transno shouldn't be set to 0 anyway
+ */
+ if (req->rq_transno > 0) {
+ spin_lock(&imp->imp_lock);
+ LASSERT(req->rq_transno <= imp->imp_last_replay_transno);
+ imp->imp_last_replay_transno = req->rq_transno;
+ spin_unlock(&imp->imp_lock);
+ } else
+ CERROR("Transno is 0 during replay!\n");
+ /* continue with recovery */
+ rc = ptlrpc_import_recovery_state_machine(imp);
out:
- return rc;
-}
+ req->rq_send_state = aa->praa_old_state;
-#undef EIO_IF_INVALID
+ if (rc != 0)
+ /* this replay failed, so restart recovery */
+ ptlrpc_connect_import(imp, NULL);
+
+ RETURN(rc);
+}
int ptlrpc_replay_req(struct ptlrpc_request *req)
{
- int rc = 0, old_level, old_status = 0;
- // struct ptlrpc_client *cli = req->rq_import->imp_client;
- struct l_wait_info lwi;
+ struct ptlrpc_replay_async_args *aa;
ENTRY;
- init_waitqueue_head(&req->rq_wait_for_rep);
- DEBUG_REQ(D_NET, req, "");
+ LASSERT(req->rq_import->imp_state == LUSTRE_IMP_REPLAY);
- req->rq_timeout = obd_timeout;
- req->rq_reqmsg->addr = req->rq_import->imp_handle.addr;
- req->rq_reqmsg->cookie = req->rq_import->imp_handle.cookie;
+ /* Not handling automatic bulk replay yet (or ever?) */
+ LASSERT(req->rq_bulk == NULL);
- /* temporarily set request to RECOVD level (reset at out:) */
- old_level = req->rq_level;
- if (req->rq_flags & PTL_RPC_FL_REPLIED)
- old_status = req->rq_repmsg->status;
- req->rq_level = LUSTRE_CONN_RECOVD;
- rc = ptl_send_rpc(req);
- if (rc) {
- CERROR("error %d, opcode %d\n", rc, req->rq_reqmsg->opc);
- ptlrpc_cleanup_request_buf(req);
- // up(&cli->cli_rpc_sem);
- GOTO(out, rc = -rc);
- }
+ DEBUG_REQ(D_HA, req, "REPLAY");
- CDEBUG(D_OTHER, "-- sleeping\n");
- lwi = LWI_INTR(NULL, NULL); /* XXX needs timeout, nested recovery */
- l_wait_event(req->rq_wait_for_rep, ptlrpc_check_reply(req), &lwi);
- CDEBUG(D_OTHER, "-- done\n");
+ LASSERT (sizeof (*aa) <= sizeof (req->rq_async_args));
+ aa = (struct ptlrpc_replay_async_args *)&req->rq_async_args;
+ memset(aa, 0, sizeof *aa);
- // up(&cli->cli_rpc_sem);
+ /* Prepare request to be resent with ptlrpcd */
+ aa->praa_old_state = req->rq_send_state;
+ req->rq_send_state = LUSTRE_IMP_REPLAY;
+ req->rq_phase = RQ_PHASE_NEW;
+ aa->praa_old_status = lustre_msg_get_status(req->rq_repmsg);
+ req->rq_status = 0;
- if (!(req->rq_flags & PTL_RPC_FL_REPLIED)) {
- CERROR("Unknown reason for wakeup\n");
- /* XXX Phil - I end up here when I kill obdctl */
- ptlrpc_abort(req);
- GOTO(out, rc = -EINTR);
- }
+ req->rq_interpret_reply = ptlrpc_replay_interpret;
+ atomic_inc(&req->rq_import->imp_replay_inflight);
+ ptlrpc_request_addref(req); /* ptlrpcd needs a ref */
- rc = lustre_unpack_msg(req->rq_repmsg, req->rq_replen);
- if (rc) {
- CERROR("unpack_rep failed: %d\n", rc);
- GOTO(out, rc);
+ ptlrpcd_add_req(req);
+ RETURN(0);
+}
+
+void ptlrpc_abort_inflight(struct obd_import *imp)
+{
+ struct list_head *tmp, *n;
+ ENTRY;
+
+ /* Make sure that no new requests get processed for this import.
+ * ptlrpc_{queue,set}_wait must (and does) hold imp_lock while testing
+ * this flag and then putting requests on sending_list or delayed_list.
+ */
+ spin_lock(&imp->imp_lock);
+
+ /* XXX locking? Maybe we should remove each request with the list
+ * locked? Also, how do we know if the requests on the list are
+ * being freed at this time?
+ */
+ list_for_each_safe(tmp, n, &imp->imp_sending_list) {
+ struct ptlrpc_request *req =
+ list_entry(tmp, struct ptlrpc_request, rq_list);
+
+ DEBUG_REQ(D_RPCTRACE, req, "inflight");
+
+ spin_lock (&req->rq_lock);
+ if (req->rq_import_generation < imp->imp_generation) {
+ req->rq_err = 1;
+ ptlrpc_wake_client_req(req);
+ }
+ spin_unlock (&req->rq_lock);
}
- CDEBUG(D_NET, "got rep "LPD64"\n", req->rq_xid);
+ list_for_each_safe(tmp, n, &imp->imp_delayed_list) {
+ struct ptlrpc_request *req =
+ list_entry(tmp, struct ptlrpc_request, rq_list);
- /* let the callback do fixups, possibly including in the request */
- if (req->rq_replay_cb)
- req->rq_replay_cb(req);
+ DEBUG_REQ(D_RPCTRACE, req, "aborting waiting req");
- if ((req->rq_flags & PTL_RPC_FL_REPLIED) &&
- req->rq_repmsg->status != old_status) {
- DEBUG_REQ(D_HA, req, "status %d, old was %d",
- req->rq_repmsg->status, old_status);
+ spin_lock (&req->rq_lock);
+ if (req->rq_import_generation < imp->imp_generation) {
+ req->rq_err = 1;
+ ptlrpc_wake_client_req(req);
+ }
+ spin_unlock (&req->rq_lock);
}
- out:
- req->rq_level = old_level;
- RETURN(rc);
+ /* Last chance to free reqs left on the replay list, but we
+ * will still leak reqs that haven't committed. */
+ if (imp->imp_replayable)
+ ptlrpc_free_committed(imp);
+
+ spin_unlock(&imp->imp_lock);
+
+ EXIT;
+}
+
+static __u64 ptlrpc_last_xid = 0;
+spinlock_t ptlrpc_last_xid_lock;
+
+__u64 ptlrpc_next_xid(void)
+{
+ __u64 tmp;
+ spin_lock(&ptlrpc_last_xid_lock);
+ tmp = ++ptlrpc_last_xid;
+ spin_unlock(&ptlrpc_last_xid_lock);
+ return tmp;
+}
+
+__u64 ptlrpc_sample_next_xid(void)
+{
+ __u64 tmp;
+ spin_lock(&ptlrpc_last_xid_lock);
+ tmp = ptlrpc_last_xid + 1;
+ spin_unlock(&ptlrpc_last_xid_lock);
+ return tmp;
}
+EXPORT_SYMBOL(ptlrpc_sample_next_xid);
git://git.whamcloud.com / fs / lustre-release.git / blobdiff