-/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
- * vim:expandtab:shiftwidth=8:tabstop=8:
+/*
+ * GPL HEADER START
*
- * Copyright (c) 2002, 2003 Cluster File Systems, Inc.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
- * This file is part of the Lustre file system, http://www.lustre.org
- * Lustre is a trademark of Cluster File Systems, Inc.
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 only,
+ * 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.
+ * This program 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 version 2 for more details (a copy is included
+ * in the LICENSE file that accompanied this code).
*
- * 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
+ * version 2 along with this program; If not, see
+ * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
*
- * 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.
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
*
+ * GPL HEADER END
+ */
+/*
+ * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Use is subject to license terms.
+ *
+ * Copyright (c) 2012, 2015, Intel Corporation.
+ */
+/*
+ * This file is part of Lustre, http://www.lustre.org/
+ * Lustre is a trademark of Sun Microsystems, Inc.
*/
#define DEBUG_SUBSYSTEM S_RPC
-#ifndef __KERNEL__
-#include <liblustre.h>
-#endif
#include <obd_support.h>
#include <lustre_net.h>
#include <lustre_lib.h>
#include <obd.h>
+#include <obd_class.h>
#include "ptlrpc_internal.h"
+/**
+ * Helper function. Sends \a len bytes from \a base at offset \a offset
+ * over \a conn connection to portal \a portal.
+ * Returns 0 on success or error code.
+ */
static int ptl_send_buf (lnet_handle_md_t *mdh, void *base, int len,
lnet_ack_req_t ack, struct ptlrpc_cb_id *cbid,
- struct ptlrpc_connection *conn, int portal, __u64 xid)
+ struct ptlrpc_connection *conn, int portal, __u64 xid,
+ unsigned int offset)
{
int rc;
lnet_md_t md;
RETURN (-ENOMEM);
}
- CDEBUG(D_NET, "Sending %d bytes to portal %d, xid "LPD64"\n",
- len, portal, xid);
+ CDEBUG(D_NET, "Sending %d bytes to portal %d, xid "LPD64", offset %u\n",
+ len, portal, xid, offset);
rc = LNetPut (conn->c_self, *mdh, ack,
- conn->c_peer, portal, xid, 0, 0);
+ conn->c_peer, portal, xid, offset, 0);
if (unlikely(rc != 0)) {
int rc2;
/* We're going to get an UNLINK event when I unlink below,
RETURN (0);
}
-int ptlrpc_start_bulk_transfer (struct ptlrpc_bulk_desc *desc)
+static void mdunlink_iterate_helper(lnet_handle_md_t *bd_mds, int count)
{
- struct ptlrpc_connection *conn = desc->bd_export->exp_connection;
- int rc;
- int rc2;
- lnet_md_t md;
- __u64 xid;
- ENTRY;
+ int i;
- if (OBD_FAIL_CHECK(OBD_FAIL_PTLRPC_BULK_PUT_NET))
- RETURN(0);
-
- /* NB no locking required until desc is on the network */
- LASSERT (!desc->bd_network_rw);
- LASSERT (desc->bd_type == BULK_PUT_SOURCE ||
- desc->bd_type == BULK_GET_SINK);
- desc->bd_success = 0;
-
- md.user_ptr = &desc->bd_cbid;
- md.eq_handle = ptlrpc_eq_h;
- md.threshold = 2; /* SENT and ACK/REPLY */
- md.options = PTLRPC_MD_OPTIONS;
- ptlrpc_fill_bulk_md(&md, desc);
-
- LASSERT (desc->bd_cbid.cbid_fn == server_bulk_callback);
- LASSERT (desc->bd_cbid.cbid_arg == desc);
+ for (i = 0; i < count; i++)
+ LNetMDUnlink(bd_mds[i]);
+}
- /* NB total length may be 0 for a read past EOF, so we send a 0
- * length bulk, since the client expects a bulk event. */
+#ifdef HAVE_SERVER_SUPPORT
+/**
+ * Prepare bulk descriptor for specified incoming request \a req that
+ * can fit \a nfrags * pages. \a type is bulk type. \a portal is where
+ * the bulk to be sent. Used on server-side after request was already
+ * received.
+ * Returns pointer to newly allocatrd initialized bulk descriptor or NULL on
+ * error.
+ */
+struct ptlrpc_bulk_desc *ptlrpc_prep_bulk_exp(struct ptlrpc_request *req,
+ unsigned nfrags, unsigned max_brw,
+ unsigned int type,
+ unsigned portal,
+ const struct ptlrpc_bulk_frag_ops
+ *ops)
+{
+ struct obd_export *exp = req->rq_export;
+ struct ptlrpc_bulk_desc *desc;
- rc = LNetMDBind(md, LNET_UNLINK, &desc->bd_md_h);
- if (rc != 0) {
- CERROR("LNetMDBind failed: %d\n", rc);
- LASSERT (rc == -ENOMEM);
- RETURN(-ENOMEM);
- }
+ ENTRY;
+ LASSERT(ptlrpc_is_bulk_op_active(type));
- /* Client's bulk and reply matchbits are the same */
- xid = desc->bd_req->rq_xid;
- CDEBUG(D_NET, "Transferring %u pages %u bytes via portal %d "
- "id %s xid "LPX64"\n", desc->bd_iov_count,
- desc->bd_nob, desc->bd_portal,
- libcfs_id2str(conn->c_peer), xid);
+ desc = ptlrpc_new_bulk(nfrags, max_brw, type, portal, ops);
+ if (desc == NULL)
+ RETURN(NULL);
- /* Network is about to get at the memory */
- desc->bd_network_rw = 1;
+ desc->bd_export = class_export_get(exp);
+ desc->bd_req = req;
- if (desc->bd_type == BULK_PUT_SOURCE)
- rc = LNetPut (conn->c_self, desc->bd_md_h, LNET_ACK_REQ,
- conn->c_peer, desc->bd_portal, xid, 0, 0);
- else
- rc = LNetGet (conn->c_self, desc->bd_md_h,
- conn->c_peer, desc->bd_portal, xid, 0);
+ desc->bd_cbid.cbid_fn = server_bulk_callback;
+ desc->bd_cbid.cbid_arg = desc;
- if (rc != 0) {
- /* Can't send, so we unlink the MD bound above. The UNLINK
- * event this creates will signal completion with failure,
- * so we return SUCCESS here! */
- CERROR("Transfer(%s, %d, "LPX64") failed: %d\n",
- libcfs_id2str(conn->c_peer), desc->bd_portal, xid, rc);
- rc2 = LNetMDUnlink(desc->bd_md_h);
- LASSERT (rc2 == 0);
- }
+ /* NB we don't assign rq_bulk here; server-side requests are
+ * re-used, and the handler frees the bulk desc explicitly. */
- RETURN(0);
+ return desc;
}
+EXPORT_SYMBOL(ptlrpc_prep_bulk_exp);
-void ptlrpc_abort_bulk (struct ptlrpc_bulk_desc *desc)
+/**
+ * Starts bulk transfer for descriptor \a desc on the server.
+ * Returns 0 on success or error code.
+ */
+int ptlrpc_start_bulk_transfer(struct ptlrpc_bulk_desc *desc)
{
- /* Server side bulk abort. Idempotent. Not thread-safe (i.e. only
- * serialises with completion callback) */
- struct l_wait_info lwi;
- int rc;
-
- LASSERT (!in_interrupt ()); /* might sleep */
-
- if (!ptlrpc_bulk_active(desc)) /* completed or */
- return; /* never started */
-
- /* Do not send any meaningful data over the wire for evicted clients */
- if (desc->bd_export && desc->bd_export->exp_failed)
- ptl_rpc_wipe_bulk_pages(desc);
-
- /* The unlink ensures the callback happens ASAP and is the last
- * one. If it fails, it must be because completion just happened,
- * but we must still l_wait_event() in this case, to give liblustre
- * a chance to run server_bulk_callback()*/
-
- LNetMDUnlink (desc->bd_md_h);
-
- 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(desc->bd_waitq,
- !ptlrpc_bulk_active(desc), &lwi);
- if (rc == 0)
- return;
+ struct obd_export *exp = desc->bd_export;
+ struct ptlrpc_connection *conn = exp->exp_connection;
+ int rc = 0;
+ __u64 mbits;
+ int posted_md;
+ int total_md;
+ lnet_md_t md;
+ ENTRY;
+
+ if (OBD_FAIL_CHECK(OBD_FAIL_PTLRPC_BULK_PUT_NET))
+ RETURN(0);
+
+ /* NB no locking required until desc is on the network */
+ LASSERT(desc->bd_md_count == 0);
+ LASSERT(ptlrpc_is_bulk_op_active(desc->bd_type));
+
+ LASSERT(desc->bd_cbid.cbid_fn == server_bulk_callback);
+ LASSERT(desc->bd_cbid.cbid_arg == desc);
+
+ /* NB total length may be 0 for a read past EOF, so we send 0
+ * length bulks, since the client expects bulk events.
+ *
+ * The client may not need all of the bulk mbits for the RPC. The RPC
+ * used the mbits of the highest bulk mbits needed, and the server masks
+ * off high bits to get bulk count for this RPC. LU-1431 */
+ mbits = desc->bd_req->rq_mbits & ~((__u64)desc->bd_md_max_brw - 1);
+ total_md = desc->bd_req->rq_mbits - mbits + 1;
+
+ desc->bd_md_count = total_md;
+ desc->bd_failure = 0;
+
+ md.user_ptr = &desc->bd_cbid;
+ md.eq_handle = ptlrpc_eq_h;
+ md.threshold = 2; /* SENT and ACK/REPLY */
+
+ for (posted_md = 0; posted_md < total_md; mbits++) {
+ md.options = PTLRPC_MD_OPTIONS;
+
+ /* NB it's assumed that source and sink buffer frags are
+ * page-aligned. Otherwise we'd have to send client bulk
+ * sizes over and split server buffer accordingly */
+ ptlrpc_fill_bulk_md(&md, desc, posted_md);
+ rc = LNetMDBind(md, LNET_UNLINK, &desc->bd_mds[posted_md]);
+ if (rc != 0) {
+ CERROR("%s: LNetMDBind failed for MD %u: rc = %d\n",
+ exp->exp_obd->obd_name, posted_md, rc);
+ LASSERT(rc == -ENOMEM);
+ if (posted_md == 0) {
+ desc->bd_md_count = 0;
+ RETURN(-ENOMEM);
+ }
+ break;
+ }
+
+ /* LU-6441: last md is not sent and desc->bd_md_count == 1 */
+ if (OBD_FAIL_CHECK_ORSET(OBD_FAIL_PTLRPC_CLIENT_BULK_CB3,
+ CFS_FAIL_ONCE) &&
+ posted_md == desc->bd_md_max_brw - 1) {
+ posted_md++;
+ continue;
+ }
+
+ /* Network is about to get at the memory */
+ if (ptlrpc_is_bulk_put_source(desc->bd_type))
+ rc = LNetPut(conn->c_self, desc->bd_mds[posted_md],
+ LNET_ACK_REQ, conn->c_peer,
+ desc->bd_portal, mbits, 0, 0);
+ else
+ rc = LNetGet(conn->c_self, desc->bd_mds[posted_md],
+ conn->c_peer, desc->bd_portal, mbits, 0);
+
+ posted_md++;
+ if (rc != 0) {
+ CERROR("%s: failed bulk transfer with %s:%u x"LPU64": "
+ "rc = %d\n", exp->exp_obd->obd_name,
+ libcfs_id2str(conn->c_peer), desc->bd_portal,
+ mbits, rc);
+ break;
+ }
+ }
+
+ if (rc != 0) {
+ /* Can't send, so we unlink the MD bound above. The UNLINK
+ * event this creates will signal completion with failure,
+ * so we return SUCCESS here! */
+ spin_lock(&desc->bd_lock);
+ desc->bd_md_count -= total_md - posted_md;
+ spin_unlock(&desc->bd_lock);
+ LASSERT(desc->bd_md_count >= 0);
+
+ mdunlink_iterate_helper(desc->bd_mds, posted_md);
+ RETURN(0);
+ }
+
+ CDEBUG(D_NET, "Transferring %u pages %u bytes via portal %d "
+ "id %s mbits "LPX64"-"LPX64"\n", desc->bd_iov_count,
+ desc->bd_nob, desc->bd_portal, libcfs_id2str(conn->c_peer),
+ mbits - posted_md, mbits - 1);
+
+ RETURN(0);
+}
- LASSERT(rc == -ETIMEDOUT);
- CWARN("Unexpectedly long timeout: desc %p\n", desc);
- }
+/**
+ * Server side bulk abort. Idempotent. Not thread-safe (i.e. only
+ * serialises with completion callback)
+ */
+void ptlrpc_abort_bulk(struct ptlrpc_bulk_desc *desc)
+{
+ struct l_wait_info lwi;
+ int rc;
+
+ LASSERT(!in_interrupt()); /* might sleep */
+
+ if (!ptlrpc_server_bulk_active(desc)) /* completed or */
+ return; /* never started */
+
+ /* We used to poison the pages with 0xab here because we did not want to
+ * send any meaningful data over the wire for evicted clients (bug 9297)
+ * However, this is no longer safe now that we use the page cache on the
+ * OSS (bug 20560) */
+
+ /* The unlink ensures the callback happens ASAP and is the last
+ * one. If it fails, it must be because completion just happened,
+ * but we must still l_wait_event() in this case, to give liblustre
+ * a chance to run server_bulk_callback()*/
+ mdunlink_iterate_helper(desc->bd_mds, desc->bd_md_max_brw);
+
+ for (;;) {
+ /* Network access will complete in finite time but the HUGE
+ * timeout lets us CWARN for visibility of sluggish NALs */
+ lwi = LWI_TIMEOUT_INTERVAL(cfs_time_seconds(LONG_UNLINK),
+ cfs_time_seconds(1), NULL, NULL);
+ rc = l_wait_event(desc->bd_waitq,
+ !ptlrpc_server_bulk_active(desc), &lwi);
+ if (rc == 0)
+ return;
+
+ LASSERT(rc == -ETIMEDOUT);
+ CWARN("Unexpectedly long timeout: desc %p\n", desc);
+ }
}
+#endif /* HAVE_SERVER_SUPPORT */
-int ptlrpc_register_bulk (struct ptlrpc_request *req)
+/**
+ * Register bulk at the sender for later transfer.
+ * Returns 0 on success or error code.
+ */
+int ptlrpc_register_bulk(struct ptlrpc_request *req)
{
- struct ptlrpc_bulk_desc *desc = req->rq_bulk;
- lnet_process_id_t peer;
- int rc;
- int rc2;
- lnet_handle_me_t me_h;
- lnet_md_t md;
- ENTRY;
+ struct ptlrpc_bulk_desc *desc = req->rq_bulk;
+ lnet_process_id_t peer;
+ int rc = 0;
+ int rc2;
+ int posted_md;
+ int total_md;
+ __u64 mbits;
+ lnet_handle_me_t me_h;
+ lnet_md_t md;
+ ENTRY;
if (OBD_FAIL_CHECK(OBD_FAIL_PTLRPC_BULK_GET_NET))
RETURN(0);
- /* NB no locking required until desc is on the network */
- LASSERT (desc->bd_nob > 0);
- LASSERT (!desc->bd_network_rw);
- LASSERT (desc->bd_iov_count <= PTLRPC_MAX_BRW_PAGES);
- LASSERT (desc->bd_req != NULL);
- LASSERT (desc->bd_type == BULK_PUT_SINK ||
- desc->bd_type == BULK_GET_SOURCE);
-
- desc->bd_success = 0;
-
- peer = desc->bd_import->imp_connection->c_peer;
-
- md.user_ptr = &desc->bd_cbid;
- md.eq_handle = ptlrpc_eq_h;
- md.threshold = 1; /* PUT or GET */
- md.options = PTLRPC_MD_OPTIONS |
- ((desc->bd_type == BULK_GET_SOURCE) ?
- LNET_MD_OP_GET : LNET_MD_OP_PUT);
- ptlrpc_fill_bulk_md(&md, desc);
-
- LASSERT (desc->bd_cbid.cbid_fn == client_bulk_callback);
- LASSERT (desc->bd_cbid.cbid_arg == desc);
-
- /* XXX Registering the same xid on retried bulk makes my head
- * explode trying to understand how the original request's bulk
- * might interfere with the retried request -eeb */
- LASSERTF (!desc->bd_registered || req->rq_xid != desc->bd_last_xid,
- "registered: %d rq_xid: "LPU64" bd_last_xid: "LPU64"\n",
- desc->bd_registered, req->rq_xid, desc->bd_last_xid);
- desc->bd_registered = 1;
- desc->bd_last_xid = req->rq_xid;
-
- rc = LNetMEAttach(desc->bd_portal, peer,
- req->rq_xid, 0, LNET_UNLINK, LNET_INS_AFTER, &me_h);
- if (rc != 0) {
- CERROR("LNetMEAttach failed: %d\n", rc);
- LASSERT (rc == -ENOMEM);
- RETURN (-ENOMEM);
- }
-
- /* About to let the network at it... */
- desc->bd_network_rw = 1;
- rc = LNetMDAttach(me_h, md, LNET_UNLINK, &desc->bd_md_h);
- if (rc != 0) {
- CERROR("LNetMDAttach failed: %d\n", rc);
- LASSERT (rc == -ENOMEM);
- desc->bd_network_rw = 0;
- rc2 = LNetMEUnlink (me_h);
- LASSERT (rc2 == 0);
- RETURN (-ENOMEM);
- }
-
- CDEBUG(D_NET, "Setup bulk %s buffers: %u pages %u bytes, xid "LPX64", "
- "portal %u\n",
- desc->bd_type == BULK_GET_SOURCE ? "get-source" : "put-sink",
- desc->bd_iov_count, desc->bd_nob,
- req->rq_xid, desc->bd_portal);
- RETURN(0);
+ /* NB no locking required until desc is on the network */
+ LASSERT(desc->bd_nob > 0);
+ LASSERT(desc->bd_md_count == 0);
+ LASSERT(desc->bd_md_max_brw <= PTLRPC_BULK_OPS_COUNT);
+ LASSERT(desc->bd_iov_count <= PTLRPC_MAX_BRW_PAGES);
+ LASSERT(desc->bd_req != NULL);
+ LASSERT(ptlrpc_is_bulk_op_passive(desc->bd_type));
+
+ /* cleanup the state of the bulk for it will be reused */
+ if (req->rq_resend || req->rq_send_state == LUSTRE_IMP_REPLAY)
+ desc->bd_nob_transferred = 0;
+ else
+ LASSERT(desc->bd_nob_transferred == 0);
+
+ desc->bd_failure = 0;
+
+ peer = desc->bd_import->imp_connection->c_peer;
+
+ LASSERT(desc->bd_cbid.cbid_fn == client_bulk_callback);
+ LASSERT(desc->bd_cbid.cbid_arg == desc);
+
+ total_md = (desc->bd_iov_count + LNET_MAX_IOV - 1) / LNET_MAX_IOV;
+ /* rq_mbits is matchbits of the final bulk */
+ mbits = req->rq_mbits - total_md + 1;
+
+ LASSERTF(mbits == (req->rq_mbits & PTLRPC_BULK_OPS_MASK),
+ "first mbits = x"LPU64", last mbits = x"LPU64"\n",
+ mbits, req->rq_mbits);
+ LASSERTF(!(desc->bd_registered &&
+ req->rq_send_state != LUSTRE_IMP_REPLAY) ||
+ mbits != desc->bd_last_mbits,
+ "registered: %d rq_mbits: "LPU64" bd_last_mbits: "LPU64"\n",
+ desc->bd_registered, mbits, desc->bd_last_mbits);
+
+ desc->bd_registered = 1;
+ desc->bd_last_mbits = mbits;
+ desc->bd_md_count = total_md;
+ md.user_ptr = &desc->bd_cbid;
+ md.eq_handle = ptlrpc_eq_h;
+ md.threshold = 1; /* PUT or GET */
+
+ for (posted_md = 0; posted_md < total_md; posted_md++, mbits++) {
+ md.options = PTLRPC_MD_OPTIONS |
+ (ptlrpc_is_bulk_op_get(desc->bd_type) ?
+ LNET_MD_OP_GET : LNET_MD_OP_PUT);
+ ptlrpc_fill_bulk_md(&md, desc, posted_md);
+
+ rc = LNetMEAttach(desc->bd_portal, peer, mbits, 0,
+ LNET_UNLINK, LNET_INS_AFTER, &me_h);
+ if (rc != 0) {
+ CERROR("%s: LNetMEAttach failed x"LPU64"/%d: rc = %d\n",
+ desc->bd_import->imp_obd->obd_name, mbits,
+ posted_md, rc);
+ break;
+ }
+
+ /* About to let the network at it... */
+ rc = LNetMDAttach(me_h, md, LNET_UNLINK,
+ &desc->bd_mds[posted_md]);
+ if (rc != 0) {
+ CERROR("%s: LNetMDAttach failed x"LPU64"/%d: rc = %d\n",
+ desc->bd_import->imp_obd->obd_name, mbits,
+ posted_md, rc);
+ rc2 = LNetMEUnlink(me_h);
+ LASSERT(rc2 == 0);
+ break;
+ }
+ }
+
+ if (rc != 0) {
+ LASSERT(rc == -ENOMEM);
+ spin_lock(&desc->bd_lock);
+ desc->bd_md_count -= total_md - posted_md;
+ spin_unlock(&desc->bd_lock);
+ LASSERT(desc->bd_md_count >= 0);
+ mdunlink_iterate_helper(desc->bd_mds, desc->bd_md_max_brw);
+ req->rq_status = -ENOMEM;
+ RETURN(-ENOMEM);
+ }
+
+ spin_lock(&desc->bd_lock);
+ /* Holler if peer manages to touch buffers before he knows the mbits */
+ if (desc->bd_md_count != total_md)
+ CWARN("%s: Peer %s touched %d buffers while I registered\n",
+ desc->bd_import->imp_obd->obd_name, libcfs_id2str(peer),
+ total_md - desc->bd_md_count);
+ spin_unlock(&desc->bd_lock);
+
+ CDEBUG(D_NET, "Setup %u bulk %s buffers: %u pages %u bytes, "
+ "mbits x"LPX64"-"LPX64", portal %u\n", desc->bd_md_count,
+ ptlrpc_is_bulk_op_get(desc->bd_type) ? "get-source" : "put-sink",
+ desc->bd_iov_count, desc->bd_nob,
+ desc->bd_last_mbits, req->rq_mbits, desc->bd_portal);
+
+ RETURN(0);
}
-void ptlrpc_unregister_bulk (struct ptlrpc_request *req)
+/**
+ * Disconnect a bulk desc from the network. Idempotent. Not
+ * thread-safe (i.e. only interlocks with completion callback).
+ * Returns 1 on success or 0 if network unregistration failed for whatever
+ * reason.
+ */
+int ptlrpc_unregister_bulk(struct ptlrpc_request *req, int async)
{
- /* Disconnect a bulk desc from the network. Idempotent. Not
- * thread-safe (i.e. only interlocks with completion callback). */
- struct ptlrpc_bulk_desc *desc = req->rq_bulk;
- cfs_waitq_t *wq;
- struct l_wait_info lwi;
- int rc;
+ struct ptlrpc_bulk_desc *desc = req->rq_bulk;
+ struct l_wait_info lwi;
+ int rc;
+ ENTRY;
- LASSERT (!in_interrupt ()); /* might sleep */
+ LASSERT(!in_interrupt()); /* might sleep */
- if (!ptlrpc_bulk_active(desc)) /* completed or */
- return; /* never registered */
+ /* Let's setup deadline for reply unlink. */
+ if (OBD_FAIL_CHECK(OBD_FAIL_PTLRPC_LONG_BULK_UNLINK) &&
+ async && req->rq_bulk_deadline == 0)
+ req->rq_bulk_deadline = cfs_time_current_sec() + LONG_UNLINK;
- LASSERT (desc->bd_req == req); /* bd_req NULL until registered */
+ if (ptlrpc_client_bulk_active(req) == 0) /* completed or */
+ RETURN(1); /* never registered */
- /* the unlink ensures the callback happens ASAP and is the last
- * one. If it fails, it must be because completion just happened,
- * but we must still l_wait_event() in this case to give liblustre
- * a chance to run client_bulk_callback() */
+ LASSERT(desc->bd_req == req); /* bd_req NULL until registered */
- LNetMDUnlink (desc->bd_md_h);
+ /* the unlink ensures the callback happens ASAP and is the last
+ * one. If it fails, it must be because completion just happened,
+ * but we must still l_wait_event() in this case to give liblustre
+ * a chance to run client_bulk_callback() */
+ mdunlink_iterate_helper(desc->bd_mds, desc->bd_md_max_brw);
- if (req->rq_set != NULL)
- wq = &req->rq_set->set_waitq;
- else
- wq = &req->rq_reply_waitq;
+ if (ptlrpc_client_bulk_active(req) == 0) /* completed or */
+ RETURN(1); /* never registered */
+
+ /* Move to "Unregistering" phase as bulk was not unlinked yet. */
+ ptlrpc_rqphase_move(req, RQ_PHASE_UNREGISTERING);
+
+ /* Do not wait for unlink to finish. */
+ if (async)
+ RETURN(0);
for (;;) {
+ /* The wq argument is ignored by user-space wait_event macros */
+ wait_queue_head_t *wq = (req->rq_set != NULL) ?
+ &req->rq_set->set_waitq :
+ &req->rq_reply_waitq;
/* 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_bulk_active(desc), &lwi);
- if (rc == 0)
- return;
+ lwi = LWI_TIMEOUT_INTERVAL(cfs_time_seconds(LONG_UNLINK),
+ cfs_time_seconds(1), NULL, NULL);
+ rc = l_wait_event(*wq, !ptlrpc_client_bulk_active(req), &lwi);
+ if (rc == 0) {
+ ptlrpc_rqphase_move(req, req->rq_next_phase);
+ RETURN(1);
+ }
- LASSERT (rc == -ETIMEDOUT);
- DEBUG_REQ(D_WARNING,req,"Unexpectedly long timeout: desc %p",
+ LASSERT(rc == -ETIMEDOUT);
+ DEBUG_REQ(D_WARNING, req, "Unexpectedly long timeout: desc %p",
desc);
}
+ RETURN(0);
+}
+
+static void ptlrpc_at_set_reply(struct ptlrpc_request *req, int flags)
+{
+ struct ptlrpc_service_part *svcpt = req->rq_rqbd->rqbd_svcpt;
+ struct ptlrpc_service *svc = svcpt->scp_service;
+ int service_time = max_t(int, cfs_time_current_sec() -
+ req->rq_arrival_time.tv_sec, 1);
+
+ if (!(flags & PTLRPC_REPLY_EARLY) &&
+ (req->rq_type != PTL_RPC_MSG_ERR) &&
+ (req->rq_reqmsg != NULL) &&
+ !(lustre_msg_get_flags(req->rq_reqmsg) &
+ (MSG_RESENT | MSG_REPLAY |
+ MSG_REQ_REPLAY_DONE | MSG_LOCK_REPLAY_DONE))) {
+ /* early replies, errors and recovery requests don't count
+ * toward our service time estimate */
+ int oldse = at_measured(&svcpt->scp_at_estimate, service_time);
+
+ if (oldse != 0) {
+ DEBUG_REQ(D_ADAPTTO, req,
+ "svc %s changed estimate from %d to %d",
+ svc->srv_name, oldse,
+ at_get(&svcpt->scp_at_estimate));
+ }
+ }
+ /* Report actual service time for client latency calc */
+ lustre_msg_set_service_time(req->rq_repmsg, service_time);
+ /* Report service time estimate for future client reqs, but report 0
+ * (to be ignored by client) if it's an error reply during recovery.
+ * (bz15815) */
+ if (req->rq_type == PTL_RPC_MSG_ERR &&
+ (req->rq_export == NULL || req->rq_export->exp_obd->obd_recovering))
+ lustre_msg_set_timeout(req->rq_repmsg, 0);
+ else
+ lustre_msg_set_timeout(req->rq_repmsg,
+ at_get(&svcpt->scp_at_estimate));
+
+ if (req->rq_reqmsg &&
+ !(lustre_msghdr_get_flags(req->rq_reqmsg) & MSGHDR_AT_SUPPORT)) {
+ CDEBUG(D_ADAPTTO, "No early reply support: flags=%#x "
+ "req_flags=%#x magic=%x/%x len=%d\n",
+ flags, lustre_msg_get_flags(req->rq_reqmsg),
+ lustre_msg_get_magic(req->rq_reqmsg),
+ lustre_msg_get_magic(req->rq_repmsg), req->rq_replen);
+ }
}
-int ptlrpc_send_reply (struct ptlrpc_request *req, int may_be_difficult)
+/**
+ * Send request reply from request \a req reply buffer.
+ * \a flags defines reply types
+ * Returns 0 on success or error code
+ */
+int ptlrpc_send_reply(struct ptlrpc_request *req, int flags)
{
- struct ptlrpc_service *svc = req->rq_rqbd->rqbd_service;
struct ptlrpc_reply_state *rs = req->rq_reply_state;
struct ptlrpc_connection *conn;
int rc;
LASSERT (req->rq_no_reply == 0);
LASSERT (req->rq_reqbuf != NULL);
LASSERT (rs != NULL);
- LASSERT (may_be_difficult || !rs->rs_difficult);
+ LASSERT ((flags & PTLRPC_REPLY_MAYBE_DIFFICULT) || !rs->rs_difficult);
LASSERT (req->rq_repmsg != NULL);
LASSERT (req->rq_repmsg == rs->rs_msg);
LASSERT (rs->rs_cb_id.cbid_fn == reply_out_callback);
LASSERT (rs->rs_cb_id.cbid_arg == rs);
+ /* There may be no rq_export during failover */
+
if (unlikely(req->rq_export && req->rq_export->exp_obd &&
req->rq_export->exp_obd->obd_fail)) {
/* Failed obd's only send ENODEV */
req->rq_export->exp_obd->obd_minor);
}
+ /* In order to keep interoprability with the client (< 2.3) which
+ * doesn't have pb_jobid in ptlrpc_body, We have to shrink the
+ * ptlrpc_body in reply buffer to ptlrpc_body_v2, otherwise, the
+ * reply buffer on client will be overflow.
+ *
+ * XXX Remove this whenver we drop the interoprability with such client.
+ */
+ req->rq_replen = lustre_shrink_msg(req->rq_repmsg, 0,
+ sizeof(struct ptlrpc_body_v2), 1);
+
if (req->rq_type != PTL_RPC_MSG_ERR)
req->rq_type = PTL_RPC_MSG_REPLY;
lustre_msg_set_type(req->rq_repmsg, req->rq_type);
- lustre_msg_set_status(req->rq_repmsg, req->rq_status);
+ lustre_msg_set_status(req->rq_repmsg,
+ ptlrpc_status_hton(req->rq_status));
lustre_msg_set_opc(req->rq_repmsg,
req->rq_reqmsg ? lustre_msg_get_opc(req->rq_reqmsg) : 0);
target_pack_pool_reply(req);
+ ptlrpc_at_set_reply(req, flags);
+
if (req->rq_export == NULL || req->rq_export->exp_connection == NULL)
- conn = ptlrpc_get_connection(req->rq_peer, req->rq_self, NULL);
+ conn = ptlrpc_connection_get(req->rq_peer, req->rq_self, NULL);
else
conn = ptlrpc_connection_addref(req->rq_export->exp_connection);
CERROR("not replying on NULL connection\n"); /* bug 9635 */
return -ENOTCONN;
}
- atomic_inc (&svc->srv_outstanding_replies);
ptlrpc_rs_addref(rs); /* +1 ref for the network */
rc = sptlrpc_svc_wrap_reply(req);
if (unlikely(rc))
goto out;
+ req->rq_sent = cfs_time_current_sec();
+
rc = ptl_send_buf (&rs->rs_md_h, rs->rs_repbuf, rs->rs_repdata_len,
- rs->rs_difficult ? LNET_ACK_REQ : LNET_NOACK_REQ,
- &rs->rs_cb_id, conn,
- svc->srv_rep_portal, req->rq_xid);
+ (rs->rs_difficult && !rs->rs_no_ack) ?
+ LNET_ACK_REQ : LNET_NOACK_REQ,
+ &rs->rs_cb_id, conn,
+ ptlrpc_req2svc(req)->srv_rep_portal,
+ req->rq_xid, req->rq_reply_off);
out:
- if (unlikely(rc != 0)) {
- atomic_dec (&svc->srv_outstanding_replies);
- ptlrpc_rs_decref(rs);
- }
- ptlrpc_put_connection(conn);
+ if (unlikely(rc != 0))
+ ptlrpc_req_drop_rs(req);
+ ptlrpc_connection_put(conn);
return rc;
}
return (ptlrpc_send_reply(req, 0));
}
-int ptlrpc_error(struct ptlrpc_request *req)
+/**
+ * For request \a req send an error reply back. Create empty
+ * reply buffers if necessary.
+ */
+int ptlrpc_send_error(struct ptlrpc_request *req, int may_be_difficult)
{
int rc;
ENTRY;
RETURN(rc);
}
- req->rq_type = PTL_RPC_MSG_ERR;
+ if (req->rq_status != -ENOSPC && req->rq_status != -EACCES &&
+ req->rq_status != -EPERM && req->rq_status != -ENOENT &&
+ req->rq_status != -EINPROGRESS && req->rq_status != -EDQUOT)
+ req->rq_type = PTL_RPC_MSG_ERR;
- rc = ptlrpc_send_reply(req, 0);
+ rc = ptlrpc_send_reply(req, may_be_difficult);
RETURN(rc);
}
+int ptlrpc_error(struct ptlrpc_request *req)
+{
+ return ptlrpc_send_error(req, 0);
+}
+
+/**
+ * Send request \a request.
+ * if \a noreply is set, don't expect any reply back and don't set up
+ * reply buffers.
+ * Returns 0 on success or error code.
+ */
int ptl_send_rpc(struct ptlrpc_request *request, int noreply)
{
int rc;
int rc2;
+ int mpflag = 0;
struct ptlrpc_connection *connection;
lnet_handle_me_t reply_me_h;
lnet_md_t reply_md;
- struct obd_device *obd = request->rq_import->imp_obd;
+ struct obd_import *imp = request->rq_import;
+ struct obd_device *obd = imp->imp_obd;
ENTRY;
if (OBD_FAIL_CHECK(OBD_FAIL_PTLRPC_DROP_RPC))
RETURN(0);
- LASSERT (request->rq_type == PTL_RPC_MSG_REQUEST);
+ LASSERT(request->rq_type == PTL_RPC_MSG_REQUEST);
+ LASSERT(request->rq_wait_ctx == 0);
/* If this is a re-transmit, we're required to have disengaged
* cleanly from the previous attempt */
- LASSERT (!request->rq_receiving_reply);
-
- if (request->rq_import->imp_obd &&
- request->rq_import->imp_obd->obd_fail) {
- CDEBUG(D_HA, "muting rpc for failed imp obd %s\n",
- request->rq_import->imp_obd->obd_name);
- /* this prevents us from waiting in ptlrpc_queue_wait */
- request->rq_err = 1;
+ LASSERT(!request->rq_receiving_reply);
+ LASSERT(!((lustre_msg_get_flags(request->rq_reqmsg) & MSG_REPLAY) &&
+ (imp->imp_state == LUSTRE_IMP_FULL)));
+
+ if (unlikely(obd != NULL && obd->obd_fail)) {
+ CDEBUG(D_HA, "muting rpc for failed imp obd %s\n",
+ obd->obd_name);
+ /* this prevents us from waiting in ptlrpc_queue_wait */
+ spin_lock(&request->rq_lock);
+ request->rq_err = 1;
+ spin_unlock(&request->rq_lock);
+ request->rq_status = -ENODEV;
RETURN(-ENODEV);
}
- connection = request->rq_import->imp_connection;
-
- lustre_msg_set_handle(request->rq_reqmsg,
- &request->rq_import->imp_remote_handle);
- lustre_msg_set_type(request->rq_reqmsg, PTL_RPC_MSG_REQUEST);
- lustre_msg_set_conn_cnt(request->rq_reqmsg,
- request->rq_import->imp_conn_cnt);
-
- rc = sptlrpc_cli_wrap_request(request);
- if (rc)
- RETURN(rc);
+ connection = imp->imp_connection;
+
+ lustre_msg_set_handle(request->rq_reqmsg,
+ &imp->imp_remote_handle);
+ lustre_msg_set_type(request->rq_reqmsg, PTL_RPC_MSG_REQUEST);
+ lustre_msg_set_conn_cnt(request->rq_reqmsg,
+ imp->imp_conn_cnt);
+ lustre_msghdr_set_flags(request->rq_reqmsg,
+ imp->imp_msghdr_flags);
+
+ /* If it's the first time to resend the request for EINPROGRESS,
+ * we need to allocate a new XID (see after_reply()), it's different
+ * from the resend for reply timeout. */
+ if (request->rq_nr_resend != 0 &&
+ list_empty(&request->rq_unreplied_list)) {
+ __u64 min_xid = 0;
+ /* resend for EINPROGRESS, allocate new xid to avoid reply
+ * reconstruction */
+ spin_lock(&imp->imp_lock);
+ ptlrpc_assign_next_xid_nolock(request);
+ min_xid = ptlrpc_known_replied_xid(imp);
+ spin_unlock(&imp->imp_lock);
+
+ lustre_msg_set_last_xid(request->rq_reqmsg, min_xid);
+ DEBUG_REQ(D_RPCTRACE, request, "Allocating new xid for "
+ "resend on EINPROGRESS");
+ }
+
+ if (request->rq_bulk != NULL) {
+ ptlrpc_set_bulk_mbits(request);
+ lustre_msg_set_mbits(request->rq_reqmsg, request->rq_mbits);
+ }
+
+ if (list_empty(&request->rq_unreplied_list) ||
+ request->rq_xid <= imp->imp_known_replied_xid) {
+ DEBUG_REQ(D_ERROR, request, "xid: "LPU64", replied: "LPU64", "
+ "list_empty:%d\n", request->rq_xid,
+ imp->imp_known_replied_xid,
+ list_empty(&request->rq_unreplied_list));
+ LBUG();
+ }
+
+ /** For enabled AT all request should have AT_SUPPORT in the
+ * FULL import state when OBD_CONNECT_AT is set */
+ LASSERT(AT_OFF || imp->imp_state != LUSTRE_IMP_FULL ||
+ (imp->imp_msghdr_flags & MSGHDR_AT_SUPPORT) ||
+ !(imp->imp_connect_data.ocd_connect_flags &
+ OBD_CONNECT_AT));
+
+ if (request->rq_resend) {
+ lustre_msg_add_flags(request->rq_reqmsg, MSG_RESENT);
+ if (request->rq_resend_cb != NULL)
+ request->rq_resend_cb(request, &request->rq_async_args);
+ }
+ if (request->rq_memalloc)
+ mpflag = cfs_memory_pressure_get_and_set();
+
+ rc = sptlrpc_cli_wrap_request(request);
+ if (rc == -ENOMEM)
+ /* set rq_sent so that this request is treated
+ * as a delayed send in the upper layers */
+ request->rq_sent = cfs_time_current_sec();
+ if (rc)
+ GOTO(out, rc);
/* bulk register should be done after wrap_request() */
if (request->rq_bulk != NULL) {
rc = ptlrpc_register_bulk (request);
if (rc != 0)
- RETURN(rc);
+ GOTO(out, rc);
}
if (!noreply) {
LASSERT (request->rq_replen != 0);
if (request->rq_repbuf == NULL) {
+ LASSERT(request->rq_repdata == NULL);
+ LASSERT(request->rq_repmsg == NULL);
rc = sptlrpc_cli_alloc_repbuf(request,
request->rq_replen);
- if (rc)
+ if (rc) {
+ /* this prevents us from looping in
+ * ptlrpc_queue_wait */
+ spin_lock(&request->rq_lock);
+ request->rq_err = 1;
+ spin_unlock(&request->rq_lock);
+ request->rq_status = rc;
GOTO(cleanup_bulk, rc);
+ }
+ } else {
+ request->rq_repdata = NULL;
+ request->rq_repmsg = NULL;
}
rc = LNetMEAttach(request->rq_reply_portal,/*XXX FIXME bug 249*/
}
}
- spin_lock(&request->rq_lock);
- /* If the MD attach succeeds, there _will_ be a reply_in callback */
- request->rq_receiving_reply = !noreply;
- /* Clear any flags that may be present from previous sends. */
+ spin_lock(&request->rq_lock);
+ /* We are responsible for unlinking the reply buffer */
+ request->rq_reply_unlinked = noreply;
+ request->rq_receiving_reply = !noreply;
+ /* Clear any flags that may be present from previous sends. */
+ request->rq_req_unlinked = 0;
request->rq_replied = 0;
request->rq_err = 0;
request->rq_timedout = 0;
request->rq_net_err = 0;
request->rq_resend = 0;
request->rq_restart = 0;
- spin_unlock(&request->rq_lock);
+ request->rq_reply_truncated = 0;
+ spin_unlock(&request->rq_lock);
if (!noreply) {
reply_md.start = request->rq_repbuf;
reply_md.length = request->rq_repbuf_len;
- reply_md.threshold = 1;
- reply_md.options = PTLRPC_MD_OPTIONS | LNET_MD_OP_PUT;
+ /* Allow multiple early replies */
+ reply_md.threshold = LNET_MD_THRESH_INF;
+ /* Manage remote for early replies */
+ reply_md.options = PTLRPC_MD_OPTIONS | LNET_MD_OP_PUT |
+ LNET_MD_MANAGE_REMOTE |
+ LNET_MD_TRUNCATE; /* allow to make EOVERFLOW error */;
reply_md.user_ptr = &request->rq_reply_cbid;
reply_md.eq_handle = ptlrpc_eq_h;
- rc = LNetMDAttach(reply_me_h, reply_md, LNET_UNLINK,
- &request->rq_reply_md_h);
+ /* We must see the unlink callback to set rq_reply_unlinked,
+ * so we can't auto-unlink */
+ rc = LNetMDAttach(reply_me_h, reply_md, LNET_RETAIN,
+ &request->rq_reply_md_h);
if (rc != 0) {
CERROR("LNetMDAttach failed: %d\n", rc);
LASSERT (rc == -ENOMEM);
- spin_lock(&request->rq_lock);
- /* ...but the MD attach didn't succeed... */
- request->rq_receiving_reply = 0;
- spin_unlock(&request->rq_lock);
- GOTO(cleanup_me, rc -ENOMEM);
+ spin_lock(&request->rq_lock);
+ /* ...but the MD attach didn't succeed... */
+ request->rq_receiving_reply = 0;
+ spin_unlock(&request->rq_lock);
+ GOTO(cleanup_me, rc = -ENOMEM);
}
CDEBUG(D_NET, "Setup reply buffer: %u bytes, xid "LPU64
request->rq_reply_portal);
}
- /* add references on request and import for request_out_callback */
+ /* add references on request for request_out_callback */
ptlrpc_request_addref(request);
- atomic_inc(&request->rq_import->imp_inflight);
- if (obd->obd_svc_stats != NULL)
- lprocfs_counter_add(obd->obd_svc_stats, PTLRPC_REQACTIVE_CNTR,
- request->rq_import->imp_inflight.counter);
+ if (obd != NULL && obd->obd_svc_stats != NULL)
+ lprocfs_counter_add(obd->obd_svc_stats, PTLRPC_REQACTIVE_CNTR,
+ atomic_read(&imp->imp_inflight));
+
+ OBD_FAIL_TIMEOUT(OBD_FAIL_PTLRPC_DELAY_SEND, request->rq_timeout + 5);
+
+ do_gettimeofday(&request->rq_sent_tv);
+ request->rq_sent = cfs_time_current_sec();
+ /* We give the server rq_timeout secs to process the req, and
+ add the network latency for our local timeout. */
+ request->rq_deadline = request->rq_sent + request->rq_timeout +
+ ptlrpc_at_get_net_latency(request);
- OBD_FAIL_TIMEOUT(OBD_FAIL_PTLRPC_DELAY_SEND, request->rq_timeout + 5);
+ ptlrpc_pinger_sending_on_import(imp);
- request->rq_sent = CURRENT_SECONDS;
- do_gettimeofday(&request->rq_arrival_time);
- ptlrpc_pinger_sending_on_import(request->rq_import);
+ DEBUG_REQ(D_INFO, request, "send flg=%x",
+ lustre_msg_get_flags(request->rq_reqmsg));
rc = ptl_send_buf(&request->rq_req_md_h,
request->rq_reqbuf, request->rq_reqdata_len,
LNET_NOACK_REQ, &request->rq_req_cbid,
connection,
request->rq_request_portal,
- request->rq_xid);
- if (rc == 0) {
- ptlrpc_lprocfs_rpc_sent(request);
- RETURN(rc);
- }
+ request->rq_xid, 0);
+ if (likely(rc == 0))
+ GOTO(out, rc);
- /* drop request_out_callback refs, we couldn't start the send */
- atomic_dec(&request->rq_import->imp_inflight);
+ request->rq_req_unlinked = 1;
ptlrpc_req_finished(request);
-
if (noreply)
- RETURN(rc);
- else
- GOTO(cleanup_me, rc);
+ GOTO(out, rc);
+
cleanup_me:
/* MEUnlink is safe; the PUT didn't even get off the ground, and
* nobody apart from the PUT's target has the right nid+XID to
rc2 = LNetMEUnlink(reply_me_h);
LASSERT (rc2 == 0);
/* UNLINKED callback called synchronously */
- LASSERT (!request->rq_receiving_reply);
+ LASSERT(!request->rq_receiving_reply);
cleanup_bulk:
- if (request->rq_bulk != NULL)
- ptlrpc_unregister_bulk(request);
-
+ /* We do sync unlink here as there was no real transfer here so
+ * the chance to have long unlink to sluggish net is smaller here. */
+ ptlrpc_unregister_bulk(request, 0);
+ out:
+ if (request->rq_memalloc)
+ cfs_memory_pressure_restore(mpflag);
return rc;
}
+EXPORT_SYMBOL(ptl_send_rpc);
-int ptlrpc_register_rqbd (struct ptlrpc_request_buffer_desc *rqbd)
+/**
+ * Register request buffer descriptor for request receiving.
+ */
+int ptlrpc_register_rqbd(struct ptlrpc_request_buffer_desc *rqbd)
{
- struct ptlrpc_service *service = rqbd->rqbd_service;
- static lnet_process_id_t match_id = {LNET_NID_ANY, LNET_PID_ANY};
- int rc;
+ struct ptlrpc_service *service = rqbd->rqbd_svcpt->scp_service;
+ static lnet_process_id_t match_id = {LNET_NID_ANY, LNET_PID_ANY};
+ int rc;
lnet_md_t md;
lnet_handle_me_t me_h;
if (OBD_FAIL_CHECK(OBD_FAIL_PTLRPC_RQBD))
return (-ENOMEM);
- rc = LNetMEAttach(service->srv_req_portal,
- match_id, 0, ~0, LNET_UNLINK, LNET_INS_AFTER, &me_h);
+ /* NB: CPT affinity service should use new LNet flag LNET_INS_LOCAL,
+ * which means buffer can only be attached on local CPT, and LND
+ * threads can find it by grabbing a local lock */
+ rc = LNetMEAttach(service->srv_req_portal,
+ match_id, 0, ~0, LNET_UNLINK,
+ rqbd->rqbd_svcpt->scp_cpt >= 0 ?
+ LNET_INS_LOCAL : LNET_INS_AFTER, &me_h);
if (rc != 0) {
CERROR("LNetMEAttach failed: %d\n", rc);
return (-ENOMEM);
git://git.whamcloud.com / fs / lustre-release.git / blobdiff