/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
* vim:expandtab:shiftwidth=8:tabstop=8:
*
- * lib/lib-move.c
- * Data movement routines
+ * GPL HEADER START
+ *
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * 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.
+ *
+ * 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).
*
- * Copyright (c) 2001-2003 Cluster File Systems, Inc.
- * Copyright (c) 2001-2002 Sandia National Laboratories
+ * 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
*
- * This file is part of Lustre, http://www.sf.net/projects/lustre/
+ * 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.
*
- * 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.
+ * GPL HEADER END
+ */
+/*
+ * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Use is subject to license terms.
+ */
+/*
+ * This file is part of Lustre, http://www.lustre.org/
+ * Lustre is a trademark of Sun Microsystems, Inc.
*
- * 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.
+ * lnet/lnet/lib-move.c
*
- * 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.
+ * Data movement routines
*/
-#ifndef __KERNEL__
-# include <stdio.h>
-#else
-# define DEBUG_SUBSYSTEM S_PORTALS
-# include <linux/kp30.h>
-#endif
-#include <portals/p30.h>
-#include <portals/lib-p30.h>
+#define DEBUG_SUBSYSTEM S_LNET
+
+#include <lnet/lib-lnet.h>
+
+static int local_nid_dist_zero = 1;
+CFS_MODULE_PARM(local_nid_dist_zero, "i", int, 0444,
+ "Reserved");
/* forward ref */
-static void lib_commit_md (lib_nal_t *nal, lib_md_t *md, lib_msg_t *msg);
-
-static lib_md_t *
-lib_match_md(lib_nal_t *nal, int index, int op_mask,
- ptl_nid_t src_nid, ptl_pid_t src_pid,
- ptl_size_t rlength, ptl_size_t roffset,
- ptl_match_bits_t match_bits, lib_msg_t *msg,
- ptl_size_t *mlength_out, ptl_size_t *offset_out)
+static void lnet_commit_md (lnet_libmd_t *md, lnet_msg_t *msg);
+
+#define LNET_MATCHMD_NONE 0 /* Didn't match */
+#define LNET_MATCHMD_OK 1 /* Matched OK */
+#define LNET_MATCHMD_DROP 2 /* Must be discarded */
+
+static int
+lnet_try_match_md (int index, int op_mask, lnet_process_id_t src,
+ unsigned int rlength, unsigned int roffset,
+ __u64 match_bits, lnet_libmd_t *md, lnet_msg_t *msg,
+ unsigned int *mlength_out, unsigned int *offset_out)
{
- lib_ni_t *ni = &nal->libnal_ni;
- struct list_head *match_list = &ni->ni_portals.tbl[index];
- struct list_head *tmp;
- lib_me_t *me;
- lib_md_t *md;
- ptl_size_t mlength;
- ptl_size_t offset;
- ENTRY;
-
- CDEBUG (D_NET, "Request from "LPU64".%d of length %d into portal %d "
- "MB="LPX64"\n", src_nid, src_pid, rlength, index, match_bits);
-
- if (index < 0 || index >= ni->ni_portals.size) {
- CERROR("Invalid portal %d not in [0-%d]\n",
- index, ni->ni_portals.size);
- goto failed;
+ /* ALWAYS called holding the LNET_LOCK, and can't LNET_UNLOCK;
+ * lnet_match_blocked_msg() relies on this to avoid races */
+ unsigned int offset;
+ unsigned int mlength;
+ lnet_me_t *me = md->md_me;
+
+ /* mismatched MD op */
+ if ((md->md_options & op_mask) == 0)
+ return LNET_MATCHMD_NONE;
+
+ /* MD exhausted */
+ if (lnet_md_exhausted(md))
+ return LNET_MATCHMD_NONE;
+
+ /* mismatched ME nid/pid? */
+ if (me->me_match_id.nid != LNET_NID_ANY &&
+ me->me_match_id.nid != src.nid)
+ return LNET_MATCHMD_NONE;
+
+ if (me->me_match_id.pid != LNET_PID_ANY &&
+ me->me_match_id.pid != src.pid)
+ return LNET_MATCHMD_NONE;
+
+ /* mismatched ME matchbits? */
+ if (((me->me_match_bits ^ match_bits) & ~me->me_ignore_bits) != 0)
+ return LNET_MATCHMD_NONE;
+
+ /* Hurrah! This _is_ a match; check it out... */
+
+ if ((md->md_options & LNET_MD_MANAGE_REMOTE) == 0)
+ offset = md->md_offset;
+ else
+ offset = roffset;
+
+ if ((md->md_options & LNET_MD_MAX_SIZE) != 0) {
+ mlength = md->md_max_size;
+ LASSERT (md->md_offset + mlength <= md->md_length);
+ } else {
+ mlength = md->md_length - offset;
}
- list_for_each (tmp, match_list) {
- me = list_entry(tmp, lib_me_t, me_list);
- md = me->md;
+ if (rlength <= mlength) { /* fits in allowed space */
+ mlength = rlength;
+ } else if ((md->md_options & LNET_MD_TRUNCATE) == 0) {
+ /* this packet _really_ is too big */
+ CERROR("Matching packet from %s, match "LPU64
+ " length %d too big: %d left, %d allowed\n",
+ libcfs_id2str(src), match_bits, rlength,
+ md->md_length - offset, mlength);
- /* ME attached but MD not attached yet */
- if (md == NULL)
- continue;
+ return LNET_MATCHMD_DROP;
+ }
- LASSERT (me == md->me);
+ /* Commit to this ME/MD */
+ CDEBUG(D_NET, "Incoming %s index %x from %s of "
+ "length %d/%d into md "LPX64" [%d] + %d\n",
+ (op_mask == LNET_MD_OP_PUT) ? "put" : "get",
+ index, libcfs_id2str(src), mlength, rlength,
+ md->md_lh.lh_cookie, md->md_niov, offset);
+
+ lnet_commit_md(md, msg);
+ md->md_offset = offset + mlength;
+
+ /* NB Caller will set ev.type and ev.hdr_data */
+ msg->msg_ev.initiator = src;
+ msg->msg_ev.pt_index = index;
+ msg->msg_ev.match_bits = match_bits;
+ msg->msg_ev.rlength = rlength;
+ msg->msg_ev.mlength = mlength;
+ msg->msg_ev.offset = offset;
+
+ lnet_md_deconstruct(md, &msg->msg_ev.md);
+ lnet_md2handle(&msg->msg_ev.md_handle, md);
+
+ *offset_out = offset;
+ *mlength_out = mlength;
+
+ /* Auto-unlink NOW, so the ME gets unlinked if required.
+ * We bumped md->md_refcount above so the MD just gets flagged
+ * for unlink when it is finalized. */
+ if ((md->md_flags & LNET_MD_FLAG_AUTO_UNLINK) != 0 &&
+ lnet_md_exhausted(md)) {
+ lnet_md_unlink(md);
+ }
- /* mismatched MD op */
- if ((md->options & op_mask) == 0)
- continue;
+ return LNET_MATCHMD_OK;
+}
- /* MD exhausted */
- if (lib_md_exhausted(md))
- continue;
+static int
+lnet_match_md(int index, int op_mask, lnet_process_id_t src,
+ unsigned int rlength, unsigned int roffset,
+ __u64 match_bits, lnet_msg_t *msg,
+ unsigned int *mlength_out, unsigned int *offset_out,
+ lnet_libmd_t **md_out)
+{
+ lnet_portal_t *ptl = &the_lnet.ln_portals[index];
+ cfs_list_t *head;
+ lnet_me_t *me;
+ lnet_me_t *tmp;
+ lnet_libmd_t *md;
+ int rc;
- /* mismatched ME nid/pid? */
- if (me->match_id.nid != PTL_NID_ANY &&
- me->match_id.nid != src_nid)
- continue;
+ CDEBUG (D_NET, "Request from %s of length %d into portal %d "
+ "MB="LPX64"\n", libcfs_id2str(src), rlength, index, match_bits);
- if (me->match_id.pid != PTL_PID_ANY &&
- me->match_id.pid != src_pid)
- continue;
+ if (index < 0 || index >= the_lnet.ln_nportals) {
+ CERROR("Invalid portal %d not in [0-%d]\n",
+ index, the_lnet.ln_nportals);
+ return LNET_MATCHMD_DROP;
+ }
+
+ head = lnet_portal_me_head(index, src, match_bits);
+ if (head == NULL) /* nobody posted anything on this portal */
+ goto out;
- /* mismatched ME matchbits? */
- if (((me->match_bits ^ match_bits) & ~me->ignore_bits) != 0)
+ cfs_list_for_each_entry_safe_typed (me, tmp, head,
+ lnet_me_t, me_list) {
+ md = me->me_md;
+
+ /* ME attached but MD not attached yet */
+ if (md == NULL)
continue;
- /* Hurrah! This _is_ a match; check it out... */
+ LASSERT (me == md->md_me);
- if ((md->options & PTL_MD_MANAGE_REMOTE) == 0)
- offset = md->offset;
- else
- offset = roffset;
+ rc = lnet_try_match_md(index, op_mask, src, rlength,
+ roffset, match_bits, md, msg,
+ mlength_out, offset_out);
+ switch (rc) {
+ default:
+ LBUG();
- if ((md->options & PTL_MD_MAX_SIZE) != 0) {
- mlength = md->max_size;
- LASSERT (md->offset + mlength <= md->length);
- } else {
- mlength = md->length - offset;
- }
+ case LNET_MATCHMD_NONE:
+ continue;
+
+ case LNET_MATCHMD_OK:
+ *md_out = md;
+ return LNET_MATCHMD_OK;
- if (rlength <= mlength) { /* fits in allowed space */
- mlength = rlength;
- } else if ((md->options & PTL_MD_TRUNCATE) == 0) {
- /* this packet _really_ is too big */
- CERROR("Matching packet %d too big: %d left, "
- "%d allowed\n", rlength, md->length - offset,
- mlength);
- goto failed;
+ case LNET_MATCHMD_DROP:
+ return LNET_MATCHMD_DROP;
}
+ /* not reached */
+ }
+
+ out:
+ if (op_mask == LNET_MD_OP_GET ||
+ !lnet_portal_is_lazy(ptl))
+ return LNET_MATCHMD_DROP;
- /* Commit to this ME/MD */
- CDEBUG(D_NET, "Incoming %s index %x from "LPU64"/%u of "
- "length %d/%d into md "LPX64" [%d] + %d\n",
- (op_mask == PTL_MD_OP_PUT) ? "put" : "get",
- index, src_nid, src_pid, mlength, rlength,
- md->md_lh.lh_cookie, md->md_niov, offset);
-
- lib_commit_md(nal, md, msg);
- md->offset = offset + mlength;
-
- /* NB Caller sets ev.type and ev.hdr_data */
- msg->ev.initiator.nid = src_nid;
- msg->ev.initiator.pid = src_pid;
- msg->ev.portal = index;
- msg->ev.match_bits = match_bits;
- msg->ev.rlength = rlength;
- msg->ev.mlength = mlength;
- msg->ev.offset = offset;
-
- lib_md_deconstruct(nal, md, &msg->ev.mem_desc);
-
- *offset_out = offset;
- *mlength_out = mlength;
-
- /* Auto-unlink NOW, so the ME gets unlinked if required.
- * We bumped md->pending above so the MD just gets flagged
- * for unlink when it is finalized. */
- if ((md->md_flags & PTL_MD_FLAG_AUTO_UNLINK) != 0 &&
- lib_md_exhausted(md))
- lib_md_unlink(nal, md);
-
- RETURN (md);
- }
-
- failed:
- CERROR (LPU64": Dropping %s from "LPU64".%d portal %d match "LPX64
- " offset %d length %d: no match\n",
- ni->ni_pid.nid, (op_mask == PTL_MD_OP_GET) ? "GET" : "PUT",
- src_nid, src_pid, index, match_bits, roffset, rlength);
- RETURN(NULL);
+ return LNET_MATCHMD_NONE;
}
-int lib_api_fail_nid (nal_t *apinal, ptl_nid_t nid, unsigned int threshold)
+int
+lnet_fail_nid (lnet_nid_t nid, unsigned int threshold)
{
- lib_nal_t *nal = apinal->nal_data;
- lib_test_peer_t *tp;
- unsigned long flags;
- struct list_head *el;
- struct list_head *next;
- struct list_head cull;
-
+ lnet_test_peer_t *tp;
+ cfs_list_t *el;
+ cfs_list_t *next;
+ cfs_list_t cull;
+
+ LASSERT (the_lnet.ln_init);
+
if (threshold != 0) {
/* Adding a new entry */
- PORTAL_ALLOC(tp, sizeof(*tp));
+ LIBCFS_ALLOC(tp, sizeof(*tp));
if (tp == NULL)
- return PTL_NO_SPACE;
-
+ return -ENOMEM;
+
tp->tp_nid = nid;
tp->tp_threshold = threshold;
-
- LIB_LOCK(nal, flags);
- list_add_tail (&tp->tp_list, &nal->libnal_ni.ni_test_peers);
- LIB_UNLOCK(nal, flags);
- return PTL_OK;
+
+ LNET_LOCK();
+ cfs_list_add_tail (&tp->tp_list, &the_lnet.ln_test_peers);
+ LNET_UNLOCK();
+ return 0;
}
-
+
/* removing entries */
- INIT_LIST_HEAD (&cull);
-
- LIB_LOCK(nal, flags);
+ CFS_INIT_LIST_HEAD (&cull);
+
+ LNET_LOCK();
+
+ cfs_list_for_each_safe (el, next, &the_lnet.ln_test_peers) {
+ tp = cfs_list_entry (el, lnet_test_peer_t, tp_list);
- list_for_each_safe (el, next, &nal->libnal_ni.ni_test_peers) {
- tp = list_entry (el, lib_test_peer_t, tp_list);
-
if (tp->tp_threshold == 0 || /* needs culling anyway */
- nid == PTL_NID_ANY || /* removing all entries */
+ nid == LNET_NID_ANY || /* removing all entries */
tp->tp_nid == nid) /* matched this one */
{
- list_del (&tp->tp_list);
- list_add (&tp->tp_list, &cull);
+ cfs_list_del (&tp->tp_list);
+ cfs_list_add (&tp->tp_list, &cull);
}
}
-
- LIB_UNLOCK(nal, flags);
-
- while (!list_empty (&cull)) {
- tp = list_entry (cull.next, lib_test_peer_t, tp_list);
- list_del (&tp->tp_list);
- PORTAL_FREE(tp, sizeof (*tp));
+ LNET_UNLOCK();
+
+ while (!cfs_list_empty (&cull)) {
+ tp = cfs_list_entry (cull.next, lnet_test_peer_t, tp_list);
+
+ cfs_list_del (&tp->tp_list);
+ LIBCFS_FREE(tp, sizeof (*tp));
}
- return PTL_OK;
+ return 0;
}
static int
-fail_peer (lib_nal_t *nal, ptl_nid_t nid, int outgoing)
+fail_peer (lnet_nid_t nid, int outgoing)
{
- lib_test_peer_t *tp;
- struct list_head *el;
- struct list_head *next;
- unsigned long flags;
- struct list_head cull;
+ lnet_test_peer_t *tp;
+ cfs_list_t *el;
+ cfs_list_t *next;
+ cfs_list_t cull;
int fail = 0;
- INIT_LIST_HEAD (&cull);
-
- LIB_LOCK (nal, flags);
+ CFS_INIT_LIST_HEAD (&cull);
- list_for_each_safe (el, next, &nal->libnal_ni.ni_test_peers) {
- tp = list_entry (el, lib_test_peer_t, tp_list);
+ LNET_LOCK();
+
+ cfs_list_for_each_safe (el, next, &the_lnet.ln_test_peers) {
+ tp = cfs_list_entry (el, lnet_test_peer_t, tp_list);
if (tp->tp_threshold == 0) {
/* zombie entry */
/* only cull zombies on outgoing tests,
* since we may be at interrupt priority on
* incoming messages. */
- list_del (&tp->tp_list);
- list_add (&tp->tp_list, &cull);
+ cfs_list_del (&tp->tp_list);
+ cfs_list_add (&tp->tp_list, &cull);
}
continue;
}
-
- if (tp->tp_nid == PTL_NID_ANY || /* fail every peer */
+
+ if (tp->tp_nid == LNET_NID_ANY || /* fail every peer */
nid == tp->tp_nid) { /* fail this peer */
fail = 1;
-
- if (tp->tp_threshold != PTL_MD_THRESH_INF) {
+
+ if (tp->tp_threshold != LNET_MD_THRESH_INF) {
tp->tp_threshold--;
if (outgoing &&
tp->tp_threshold == 0) {
/* see above */
- list_del (&tp->tp_list);
- list_add (&tp->tp_list, &cull);
+ cfs_list_del (&tp->tp_list);
+ cfs_list_add (&tp->tp_list, &cull);
}
}
break;
}
}
-
- LIB_UNLOCK (nal, flags);
- while (!list_empty (&cull)) {
- tp = list_entry (cull.next, lib_test_peer_t, tp_list);
- list_del (&tp->tp_list);
-
- PORTAL_FREE(tp, sizeof (*tp));
+ LNET_UNLOCK ();
+
+ while (!cfs_list_empty (&cull)) {
+ tp = cfs_list_entry (cull.next, lnet_test_peer_t, tp_list);
+ cfs_list_del (&tp->tp_list);
+
+ LIBCFS_FREE(tp, sizeof (*tp));
}
return (fail);
}
-ptl_size_t
-lib_iov_nob (int niov, struct iovec *iov)
+unsigned int
+lnet_iov_nob (unsigned int niov, struct iovec *iov)
{
- ptl_size_t nob = 0;
-
+ unsigned int nob = 0;
+
while (niov-- > 0)
nob += (iov++)->iov_len;
-
+
return (nob);
}
void
-lib_copy_iov2buf (char *dest, int niov, struct iovec *iov,
- ptl_size_t offset, ptl_size_t len)
+lnet_copy_iov2iov (unsigned int ndiov, struct iovec *diov, unsigned int doffset,
+ unsigned int nsiov, struct iovec *siov, unsigned int soffset,
+ unsigned int nob)
{
- ptl_size_t nob;
+ /* NB diov, siov are READ-ONLY */
+ unsigned int this_nob;
- if (len == 0)
+ if (nob == 0)
return;
-
- /* skip complete frags before 'offset' */
- LASSERT (niov > 0);
- while (offset >= iov->iov_len) {
- offset -= iov->iov_len;
- iov++;
- niov--;
- LASSERT (niov > 0);
- }
-
- do {
- LASSERT (niov > 0);
- nob = MIN (iov->iov_len - offset, len);
- memcpy (dest, iov->iov_base + offset, nob);
-
- len -= nob;
- dest += nob;
- niov--;
- iov++;
- offset = 0;
- } while (len > 0);
-}
-
-void
-lib_copy_buf2iov (int niov, struct iovec *iov, ptl_size_t offset,
- char *src, ptl_size_t len)
-{
- ptl_size_t nob;
- if (len == 0)
- return;
+ /* skip complete frags before 'doffset' */
+ LASSERT (ndiov > 0);
+ while (doffset >= diov->iov_len) {
+ doffset -= diov->iov_len;
+ diov++;
+ ndiov--;
+ LASSERT (ndiov > 0);
+ }
- /* skip complete frags before 'offset' */
- LASSERT (niov > 0);
- while (offset >= iov->iov_len) {
- offset -= iov->iov_len;
- iov++;
- niov--;
- LASSERT (niov > 0);
+ /* skip complete frags before 'soffset' */
+ LASSERT (nsiov > 0);
+ while (soffset >= siov->iov_len) {
+ soffset -= siov->iov_len;
+ siov++;
+ nsiov--;
+ LASSERT (nsiov > 0);
}
-
+
do {
- LASSERT (niov > 0);
- nob = MIN (iov->iov_len - offset, len);
- memcpy (iov->iov_base + offset, src, nob);
-
- len -= nob;
- src += nob;
- niov--;
- iov++;
- offset = 0;
- } while (len > 0);
+ LASSERT (ndiov > 0);
+ LASSERT (nsiov > 0);
+ this_nob = MIN(diov->iov_len - doffset,
+ siov->iov_len - soffset);
+ this_nob = MIN(this_nob, nob);
+
+ memcpy ((char *)diov->iov_base + doffset,
+ (char *)siov->iov_base + soffset, this_nob);
+ nob -= this_nob;
+
+ if (diov->iov_len > doffset + this_nob) {
+ doffset += this_nob;
+ } else {
+ diov++;
+ ndiov--;
+ doffset = 0;
+ }
+
+ if (siov->iov_len > soffset + this_nob) {
+ soffset += this_nob;
+ } else {
+ siov++;
+ nsiov--;
+ soffset = 0;
+ }
+ } while (nob > 0);
}
int
-lib_extract_iov (int dst_niov, struct iovec *dst,
- int src_niov, struct iovec *src,
- ptl_size_t offset, ptl_size_t len)
+lnet_extract_iov (int dst_niov, struct iovec *dst,
+ int src_niov, struct iovec *src,
+ unsigned int offset, unsigned int len)
{
/* Initialise 'dst' to the subset of 'src' starting at 'offset',
* for exactly 'len' bytes, and return the number of entries.
* NB not destructive to 'src' */
- ptl_size_t frag_len;
- int niov;
+ unsigned int frag_len;
+ unsigned int niov;
if (len == 0) /* no data => */
return (0); /* no frags */
niov = 1;
for (;;) {
LASSERT (src_niov > 0);
- LASSERT (niov <= dst_niov);
-
+ LASSERT ((int)niov <= dst_niov);
+
frag_len = src->iov_len - offset;
dst->iov_base = ((char *)src->iov_base) + offset;
dst->iov_len = len;
return (niov);
}
-
+
dst->iov_len = frag_len;
len -= frag_len;
}
#ifndef __KERNEL__
-ptl_size_t
-lib_kiov_nob (int niov, ptl_kiov_t *kiov)
+unsigned int
+lnet_kiov_nob (unsigned int niov, lnet_kiov_t *kiov)
{
LASSERT (0);
return (0);
}
void
-lib_copy_kiov2buf (char *dest, int niov, ptl_kiov_t *kiov,
- ptl_size_t offset, ptl_size_t len)
+lnet_copy_kiov2kiov (unsigned int ndkiov, lnet_kiov_t *dkiov, unsigned int doffset,
+ unsigned int nskiov, lnet_kiov_t *skiov, unsigned int soffset,
+ unsigned int nob)
+{
+ LASSERT (0);
+}
+
+void
+lnet_copy_kiov2iov (unsigned int niov, struct iovec *iov, unsigned int iovoffset,
+ unsigned int nkiov, lnet_kiov_t *kiov, unsigned int kiovoffset,
+ unsigned int nob)
{
LASSERT (0);
}
void
-lib_copy_buf2kiov (int niov, ptl_kiov_t *kiov, ptl_size_t offset,
- char *src, ptl_size_t len)
+lnet_copy_iov2kiov (unsigned int nkiov, lnet_kiov_t *kiov, unsigned int kiovoffset,
+ unsigned int niov, struct iovec *iov, unsigned int iovoffset,
+ unsigned int nob)
{
LASSERT (0);
}
int
-lib_extract_kiov (int dst_niov, ptl_kiov_t *dst,
- int src_niov, ptl_kiov_t *src,
- ptl_size_t offset, ptl_size_t len)
+lnet_extract_kiov (int dst_niov, lnet_kiov_t *dst,
+ int src_niov, lnet_kiov_t *src,
+ unsigned int offset, unsigned int len)
{
LASSERT (0);
}
-#else
+#else /* __KERNEL__ */
-ptl_size_t
-lib_kiov_nob (int niov, ptl_kiov_t *kiov)
+unsigned int
+lnet_kiov_nob (unsigned int niov, lnet_kiov_t *kiov)
{
- ptl_size_t nob = 0;
+ unsigned int nob = 0;
while (niov-- > 0)
nob += (kiov++)->kiov_len;
}
void
-lib_copy_kiov2buf (char *dest, int niov, ptl_kiov_t *kiov,
- ptl_size_t offset, ptl_size_t len)
+lnet_copy_kiov2kiov (unsigned int ndiov, lnet_kiov_t *diov, unsigned int doffset,
+ unsigned int nsiov, lnet_kiov_t *siov, unsigned int soffset,
+ unsigned int nob)
+{
+ /* NB diov, siov are READ-ONLY */
+ unsigned int this_nob;
+ char *daddr = NULL;
+ char *saddr = NULL;
+
+ if (nob == 0)
+ return;
+
+ LASSERT (!cfs_in_interrupt ());
+
+ LASSERT (ndiov > 0);
+ while (doffset >= diov->kiov_len) {
+ doffset -= diov->kiov_len;
+ diov++;
+ ndiov--;
+ LASSERT (ndiov > 0);
+ }
+
+ LASSERT (nsiov > 0);
+ while (soffset >= siov->kiov_len) {
+ soffset -= siov->kiov_len;
+ siov++;
+ nsiov--;
+ LASSERT (nsiov > 0);
+ }
+
+ do {
+ LASSERT (ndiov > 0);
+ LASSERT (nsiov > 0);
+ this_nob = MIN(diov->kiov_len - doffset,
+ siov->kiov_len - soffset);
+ this_nob = MIN(this_nob, nob);
+
+ if (daddr == NULL)
+ daddr = ((char *)cfs_kmap(diov->kiov_page)) +
+ diov->kiov_offset + doffset;
+ if (saddr == NULL)
+ saddr = ((char *)cfs_kmap(siov->kiov_page)) +
+ siov->kiov_offset + soffset;
+
+ /* Vanishing risk of kmap deadlock when mapping 2 pages.
+ * However in practice at least one of the kiovs will be mapped
+ * kernel pages and the map/unmap will be NOOPs */
+
+ memcpy (daddr, saddr, this_nob);
+ nob -= this_nob;
+
+ if (diov->kiov_len > doffset + this_nob) {
+ daddr += this_nob;
+ doffset += this_nob;
+ } else {
+ cfs_kunmap(diov->kiov_page);
+ daddr = NULL;
+ diov++;
+ ndiov--;
+ doffset = 0;
+ }
+
+ if (siov->kiov_len > soffset + this_nob) {
+ saddr += this_nob;
+ soffset += this_nob;
+ } else {
+ cfs_kunmap(siov->kiov_page);
+ saddr = NULL;
+ siov++;
+ nsiov--;
+ soffset = 0;
+ }
+ } while (nob > 0);
+
+ if (daddr != NULL)
+ cfs_kunmap(diov->kiov_page);
+ if (saddr != NULL)
+ cfs_kunmap(siov->kiov_page);
+}
+
+void
+lnet_copy_kiov2iov (unsigned int niov, struct iovec *iov, unsigned int iovoffset,
+ unsigned int nkiov, lnet_kiov_t *kiov, unsigned int kiovoffset,
+ unsigned int nob)
{
- ptl_size_t nob;
- char *addr;
+ /* NB iov, kiov are READ-ONLY */
+ unsigned int this_nob;
+ char *addr = NULL;
- if (len == 0)
+ if (nob == 0)
return;
-
- LASSERT (!in_interrupt ());
+
+ LASSERT (!cfs_in_interrupt ());
LASSERT (niov > 0);
- while (offset > kiov->kiov_len) {
- offset -= kiov->kiov_len;
- kiov++;
+ while (iovoffset >= iov->iov_len) {
+ iovoffset -= iov->iov_len;
+ iov++;
niov--;
LASSERT (niov > 0);
}
-
- do{
- LASSERT (niov > 0);
- nob = MIN (kiov->kiov_len - offset, len);
-
- addr = ((char *)kmap (kiov->kiov_page)) + kiov->kiov_offset + offset;
- memcpy (dest, addr, nob);
- kunmap (kiov->kiov_page);
-
- len -= nob;
- dest += nob;
- niov--;
+
+ LASSERT (nkiov > 0);
+ while (kiovoffset >= kiov->kiov_len) {
+ kiovoffset -= kiov->kiov_len;
kiov++;
- offset = 0;
- } while (len > 0);
+ nkiov--;
+ LASSERT (nkiov > 0);
+ }
+
+ do {
+ LASSERT (niov > 0);
+ LASSERT (nkiov > 0);
+ this_nob = MIN(iov->iov_len - iovoffset,
+ kiov->kiov_len - kiovoffset);
+ this_nob = MIN(this_nob, nob);
+
+ if (addr == NULL)
+ addr = ((char *)cfs_kmap(kiov->kiov_page)) +
+ kiov->kiov_offset + kiovoffset;
+
+ memcpy ((char *)iov->iov_base + iovoffset, addr, this_nob);
+ nob -= this_nob;
+
+ if (iov->iov_len > iovoffset + this_nob) {
+ iovoffset += this_nob;
+ } else {
+ iov++;
+ niov--;
+ iovoffset = 0;
+ }
+
+ if (kiov->kiov_len > kiovoffset + this_nob) {
+ addr += this_nob;
+ kiovoffset += this_nob;
+ } else {
+ cfs_kunmap(kiov->kiov_page);
+ addr = NULL;
+ kiov++;
+ nkiov--;
+ kiovoffset = 0;
+ }
+
+ } while (nob > 0);
+
+ if (addr != NULL)
+ cfs_kunmap(kiov->kiov_page);
}
void
-lib_copy_buf2kiov (int niov, ptl_kiov_t *kiov, ptl_size_t offset,
- char *src, ptl_size_t len)
+lnet_copy_iov2kiov (unsigned int nkiov, lnet_kiov_t *kiov, unsigned int kiovoffset,
+ unsigned int niov, struct iovec *iov, unsigned int iovoffset,
+ unsigned int nob)
{
- ptl_size_t nob;
- char *addr;
+ /* NB kiov, iov are READ-ONLY */
+ unsigned int this_nob;
+ char *addr = NULL;
- if (len == 0)
+ if (nob == 0)
return;
- LASSERT (!in_interrupt ());
+ LASSERT (!cfs_in_interrupt ());
- LASSERT (niov > 0);
- while (offset >= kiov->kiov_len) {
- offset -= kiov->kiov_len;
+ LASSERT (nkiov > 0);
+ while (kiovoffset >= kiov->kiov_len) {
+ kiovoffset -= kiov->kiov_len;
kiov++;
+ nkiov--;
+ LASSERT (nkiov > 0);
+ }
+
+ LASSERT (niov > 0);
+ while (iovoffset >= iov->iov_len) {
+ iovoffset -= iov->iov_len;
+ iov++;
niov--;
LASSERT (niov > 0);
}
-
+
do {
+ LASSERT (nkiov > 0);
LASSERT (niov > 0);
- nob = MIN (kiov->kiov_len - offset, len);
-
- addr = ((char *)kmap (kiov->kiov_page)) + kiov->kiov_offset + offset;
- memcpy (addr, src, nob);
- kunmap (kiov->kiov_page);
-
- len -= nob;
- src += nob;
- niov--;
- kiov++;
- offset = 0;
- } while (len > 0);
+ this_nob = MIN(kiov->kiov_len - kiovoffset,
+ iov->iov_len - iovoffset);
+ this_nob = MIN(this_nob, nob);
+
+ if (addr == NULL)
+ addr = ((char *)cfs_kmap(kiov->kiov_page)) +
+ kiov->kiov_offset + kiovoffset;
+
+ memcpy (addr, (char *)iov->iov_base + iovoffset, this_nob);
+ nob -= this_nob;
+
+ if (kiov->kiov_len > kiovoffset + this_nob) {
+ addr += this_nob;
+ kiovoffset += this_nob;
+ } else {
+ cfs_kunmap(kiov->kiov_page);
+ addr = NULL;
+ kiov++;
+ nkiov--;
+ kiovoffset = 0;
+ }
+
+ if (iov->iov_len > iovoffset + this_nob) {
+ iovoffset += this_nob;
+ } else {
+ iov++;
+ niov--;
+ iovoffset = 0;
+ }
+ } while (nob > 0);
+
+ if (addr != NULL)
+ cfs_kunmap(kiov->kiov_page);
}
int
-lib_extract_kiov (int dst_niov, ptl_kiov_t *dst,
- int src_niov, ptl_kiov_t *src,
- ptl_size_t offset, ptl_size_t len)
+lnet_extract_kiov (int dst_niov, lnet_kiov_t *dst,
+ int src_niov, lnet_kiov_t *src,
+ unsigned int offset, unsigned int len)
{
/* Initialise 'dst' to the subset of 'src' starting at 'offset',
* for exactly 'len' bytes, and return the number of entries.
* NB not destructive to 'src' */
- ptl_size_t frag_len;
- int niov;
+ unsigned int frag_len;
+ unsigned int niov;
if (len == 0) /* no data => */
return (0); /* no frags */
niov = 1;
for (;;) {
LASSERT (src_niov > 0);
- LASSERT (niov <= dst_niov);
-
+ LASSERT ((int)niov <= dst_niov);
+
frag_len = src->kiov_len - offset;
dst->kiov_page = src->kiov_page;
dst->kiov_offset = src->kiov_offset + offset;
if (len <= frag_len) {
dst->kiov_len = len;
- LASSERT (dst->kiov_offset + dst->kiov_len <= PAGE_SIZE);
+ LASSERT (dst->kiov_offset + dst->kiov_len <= CFS_PAGE_SIZE);
return (niov);
}
dst->kiov_len = frag_len;
- LASSERT (dst->kiov_offset + dst->kiov_len <= PAGE_SIZE);
+ LASSERT (dst->kiov_offset + dst->kiov_len <= CFS_PAGE_SIZE);
len -= frag_len;
dst++;
}
#endif
-ptl_err_t
-lib_recv (lib_nal_t *nal, void *private, lib_msg_t *msg, lib_md_t *md,
- ptl_size_t offset, ptl_size_t mlen, ptl_size_t rlen)
+void
+lnet_ni_recv(lnet_ni_t *ni, void *private, lnet_msg_t *msg, int delayed,
+ unsigned int offset, unsigned int mlen, unsigned int rlen)
+{
+ unsigned int niov = 0;
+ struct iovec *iov = NULL;
+ lnet_kiov_t *kiov = NULL;
+ int rc;
+
+ LASSERT (!cfs_in_interrupt ());
+ LASSERT (mlen == 0 || msg != NULL);
+
+ if (msg != NULL) {
+ LASSERT(msg->msg_receiving);
+ LASSERT(!msg->msg_sending);
+ LASSERT(rlen == msg->msg_len);
+ LASSERT(mlen <= msg->msg_len);
+
+ msg->msg_wanted = mlen;
+ msg->msg_offset = offset;
+ msg->msg_receiving = 0;
+
+ if (mlen != 0) {
+ niov = msg->msg_niov;
+ iov = msg->msg_iov;
+ kiov = msg->msg_kiov;
+
+ LASSERT (niov > 0);
+ LASSERT ((iov == NULL) != (kiov == NULL));
+ }
+ }
+
+ rc = (ni->ni_lnd->lnd_recv)(ni, private, msg, delayed,
+ niov, iov, kiov, offset, mlen, rlen);
+ if (rc < 0)
+ lnet_finalize(ni, msg, rc);
+}
+
+int
+lnet_compare_routes(lnet_route_t *r1, lnet_route_t *r2)
{
- if (mlen == 0)
- return (nal->libnal_recv(nal, private, msg,
- 0, NULL,
- offset, mlen, rlen));
-
- if ((md->options & PTL_MD_KIOV) == 0)
- return (nal->libnal_recv(nal, private, msg,
- md->md_niov, md->md_iov.iov,
- offset, mlen, rlen));
-
- return (nal->libnal_recv_pages(nal, private, msg,
- md->md_niov, md->md_iov.kiov,
- offset, mlen, rlen));
+ lnet_peer_t *p1 = r1->lr_gateway;
+ lnet_peer_t *p2 = r2->lr_gateway;
+
+ if (r1->lr_hops < r2->lr_hops)
+ return 1;
+
+ if (r1->lr_hops > r2->lr_hops)
+ return -1;
+
+ if (p1->lp_txqnob < p2->lp_txqnob)
+ return 1;
+
+ if (p1->lp_txqnob > p2->lp_txqnob)
+ return -1;
+
+ if (p1->lp_txcredits > p2->lp_txcredits)
+ return 1;
+
+ if (p1->lp_txcredits < p2->lp_txcredits)
+ return -1;
+
+ return 0;
}
-ptl_err_t
-lib_send (lib_nal_t *nal, void *private, lib_msg_t *msg,
- ptl_hdr_t *hdr, int type, ptl_nid_t nid, ptl_pid_t pid,
- lib_md_t *md, ptl_size_t offset, ptl_size_t len)
+
+void
+lnet_setpayloadbuffer(lnet_msg_t *msg)
{
- if (len == 0)
- return (nal->libnal_send(nal, private, msg,
- hdr, type, nid, pid,
- 0, NULL,
- offset, len));
-
- if ((md->options & PTL_MD_KIOV) == 0)
- return (nal->libnal_send(nal, private, msg,
- hdr, type, nid, pid,
- md->md_niov, md->md_iov.iov,
- offset, len));
-
- return (nal->libnal_send_pages(nal, private, msg,
- hdr, type, nid, pid,
- md->md_niov, md->md_iov.kiov,
- offset, len));
+ lnet_libmd_t *md = msg->msg_md;
+
+ LASSERT (msg->msg_len > 0);
+ LASSERT (!msg->msg_routing);
+ LASSERT (md != NULL);
+ LASSERT (msg->msg_niov == 0);
+ LASSERT (msg->msg_iov == NULL);
+ LASSERT (msg->msg_kiov == NULL);
+
+ msg->msg_niov = md->md_niov;
+ if ((md->md_options & LNET_MD_KIOV) != 0)
+ msg->msg_kiov = md->md_iov.kiov;
+ else
+ msg->msg_iov = md->md_iov.iov;
}
-static void
-lib_commit_md (lib_nal_t *nal, lib_md_t *md, lib_msg_t *msg)
+void
+lnet_prep_send(lnet_msg_t *msg, int type, lnet_process_id_t target,
+ unsigned int offset, unsigned int len)
{
- /* ALWAYS called holding the LIB_LOCK */
- lib_counters_t *counters = &nal->libnal_ni.ni_counters;
+ msg->msg_type = type;
+ msg->msg_target = target;
+ msg->msg_len = len;
+ msg->msg_offset = offset;
+
+ if (len != 0)
+ lnet_setpayloadbuffer(msg);
+
+ memset (&msg->msg_hdr, 0, sizeof (msg->msg_hdr));
+ msg->msg_hdr.type = cpu_to_le32(type);
+ msg->msg_hdr.dest_nid = cpu_to_le64(target.nid);
+ msg->msg_hdr.dest_pid = cpu_to_le32(target.pid);
+ /* src_nid will be set later */
+ msg->msg_hdr.src_pid = cpu_to_le32(the_lnet.ln_pid);
+ msg->msg_hdr.payload_length = cpu_to_le32(len);
+}
- /* Here, we commit the MD to a network OP by marking it busy and
- * decrementing its threshold. Come what may, the network "owns"
- * the MD until a call to lib_finalize() signals completion. */
- msg->md = md;
-
- md->pending++;
- if (md->threshold != PTL_MD_THRESH_INF) {
- LASSERT (md->threshold > 0);
- md->threshold--;
- }
+void
+lnet_ni_send(lnet_ni_t *ni, lnet_msg_t *msg)
+{
+ void *priv = msg->msg_private;
+ int rc;
- counters->msgs_alloc++;
- if (counters->msgs_alloc > counters->msgs_max)
- counters->msgs_max = counters->msgs_alloc;
+ LASSERT (!cfs_in_interrupt ());
+ LASSERT (LNET_NETTYP(LNET_NIDNET(ni->ni_nid)) == LOLND ||
+ (msg->msg_txcredit && msg->msg_peertxcredit));
- list_add (&msg->msg_list, &nal->libnal_ni.ni_active_msgs);
+ rc = (ni->ni_lnd->lnd_send)(ni, priv, msg);
+ if (rc < 0)
+ lnet_finalize(ni, msg, rc);
}
-static void
-lib_drop_message (lib_nal_t *nal, void *private, ptl_hdr_t *hdr)
+int
+lnet_eager_recv_locked(lnet_msg_t *msg)
{
- unsigned long flags;
-
- /* CAVEAT EMPTOR: this only drops messages that we've not committed
- * to receive (init_msg() not called) and therefore can't cause an
- * event. */
-
- LIB_LOCK(nal, flags);
- nal->libnal_ni.ni_counters.drop_count++;
- nal->libnal_ni.ni_counters.drop_length += hdr->payload_length;
- LIB_UNLOCK(nal, flags);
-
- /* NULL msg => if NAL calls lib_finalize it will be a noop */
- (void) lib_recv(nal, private, NULL, NULL, 0, 0, hdr->payload_length);
+ lnet_peer_t *peer;
+ lnet_ni_t *ni;
+ int rc = 0;
+
+ LASSERT (!msg->msg_delayed);
+ msg->msg_delayed = 1;
+
+ LASSERT (msg->msg_receiving);
+ LASSERT (!msg->msg_sending);
+
+ peer = msg->msg_rxpeer;
+ ni = peer->lp_ni;
+
+ if (ni->ni_lnd->lnd_eager_recv != NULL) {
+ LNET_UNLOCK();
+
+ rc = (ni->ni_lnd->lnd_eager_recv)(ni, msg->msg_private, msg,
+ &msg->msg_private);
+ if (rc != 0) {
+ CERROR("recv from %s / send to %s aborted: "
+ "eager_recv failed %d\n",
+ libcfs_nid2str(peer->lp_nid),
+ libcfs_id2str(msg->msg_target), rc);
+ LASSERT (rc < 0); /* required by my callers */
+ }
+
+ LNET_LOCK();
+ }
+
+ return rc;
}
-/*
- * Incoming messages have a ptl_msg_t object associated with them
- * by the library. This object encapsulates the state of the
- * message and allows the NAL to do non-blocking receives or sends
- * of long messages.
- *
- */
-static ptl_err_t
-parse_put(lib_nal_t *nal, ptl_hdr_t *hdr, void *private, lib_msg_t *msg)
+/* NB: caller shall hold a ref on 'lp' as I'd drop LNET_LOCK */
+void
+lnet_ni_peer_alive(lnet_peer_t *lp)
{
- lib_ni_t *ni = &nal->libnal_ni;
- ptl_size_t mlength = 0;
- ptl_size_t offset = 0;
- ptl_err_t rc;
- lib_md_t *md;
- unsigned long flags;
-
- /* Convert put fields to host byte order */
- hdr->msg.put.match_bits = NTOH__u64 (hdr->msg.put.match_bits);
- hdr->msg.put.ptl_index = NTOH__u32 (hdr->msg.put.ptl_index);
- hdr->msg.put.offset = NTOH__u32 (hdr->msg.put.offset);
+ cfs_time_t last_alive = 0;
+ lnet_ni_t *ni = lp->lp_ni;
- LIB_LOCK(nal, flags);
+ LASSERT (lnet_peer_aliveness_enabled(lp));
+ LASSERT (ni->ni_lnd->lnd_query != NULL);
- md = lib_match_md(nal, hdr->msg.put.ptl_index, PTL_MD_OP_PUT,
- hdr->src_nid, hdr->src_pid,
- hdr->payload_length, hdr->msg.put.offset,
- hdr->msg.put.match_bits, msg,
- &mlength, &offset);
- if (md == NULL) {
- LIB_UNLOCK(nal, flags);
- return (PTL_FAIL);
- }
+ LNET_UNLOCK();
+ (ni->ni_lnd->lnd_query)(ni, lp->lp_nid, &last_alive);
+ LNET_LOCK();
- msg->ev.type = PTL_EVENT_PUT_END;
- msg->ev.hdr_data = hdr->msg.put.hdr_data;
+ lp->lp_last_query = cfs_time_current();
- if (!ptl_is_wire_handle_none(&hdr->msg.put.ack_wmd) &&
- !(md->options & PTL_MD_ACK_DISABLE)) {
- msg->ack_wmd = hdr->msg.put.ack_wmd;
- }
+ if (last_alive != 0) /* NI has updated timestamp */
+ lp->lp_last_alive = last_alive;
+ return;
+}
- ni->ni_counters.recv_count++;
- ni->ni_counters.recv_length += mlength;
+/* NB: always called with LNET_LOCK held */
+static inline int
+lnet_peer_is_alive (lnet_peer_t *lp, cfs_time_t now)
+{
+ int alive;
+ cfs_time_t deadline;
+
+ LASSERT (lnet_peer_aliveness_enabled(lp));
+
+ /* Trust lnet_notify() if it has more recent aliveness news, but
+ * ignore the initial assumed death (see lnet_peers_start_down()).
+ */
+ if (!lp->lp_alive && lp->lp_alive_count > 0 &&
+ cfs_time_aftereq(lp->lp_timestamp, lp->lp_last_alive))
+ return 0;
+
+ deadline = cfs_time_add(lp->lp_last_alive,
+ cfs_time_seconds(lp->lp_ni->ni_peertimeout));
+ alive = cfs_time_after(deadline, now);
+
+ /* Update obsolete lp_alive except for routers assumed to be dead
+ * initially, because router checker would update aliveness in this
+ * case, and moreover lp_last_alive at peer creation is assumed.
+ */
+ if (alive && !lp->lp_alive &&
+ !(lnet_isrouter(lp) && lp->lp_alive_count == 0))
+ lnet_notify_locked(lp, 0, 1, lp->lp_last_alive);
+
+ return alive;
+}
- LIB_UNLOCK(nal, flags);
- rc = lib_recv(nal, private, msg, md, offset, mlength,
- hdr->payload_length);
- if (rc != PTL_OK)
- CERROR(LPU64": error on receiving PUT from "LPU64": %d\n",
- ni->ni_pid.nid, hdr->src_nid, rc);
+/* NB: returns 1 when alive, 0 when dead, negative when error;
+ * may drop the LNET_LOCK */
+int
+lnet_peer_alive_locked (lnet_peer_t *lp)
+{
+ cfs_time_t now = cfs_time_current();
+
+ if (!lnet_peer_aliveness_enabled(lp))
+ return -ENODEV;
+
+ if (lnet_peer_is_alive(lp, now))
+ return 1;
+
+ /* Peer appears dead, but we should avoid frequent NI queries (at
+ * most once per lnet_queryinterval seconds). */
+ if (lp->lp_last_query != 0) {
+ static const int lnet_queryinterval = 1;
+
+ cfs_time_t next_query =
+ cfs_time_add(lp->lp_last_query,
+ cfs_time_seconds(lnet_queryinterval));
+
+ if (cfs_time_before(now, next_query)) {
+ if (lp->lp_alive)
+ CWARN("Unexpected aliveness of peer %s: "
+ "%d < %d (%d/%d)\n",
+ libcfs_nid2str(lp->lp_nid),
+ (int)now, (int)next_query,
+ lnet_queryinterval,
+ lp->lp_ni->ni_peertimeout);
+ return 0;
+ }
+ }
+
+ /* query NI for latest aliveness news */
+ lnet_ni_peer_alive(lp);
- return (rc);
+ if (lnet_peer_is_alive(lp, now))
+ return 1;
+
+ lnet_notify_locked(lp, 0, 0, lp->lp_last_alive);
+ return 0;
}
-static ptl_err_t
-parse_get(lib_nal_t *nal, ptl_hdr_t *hdr, void *private, lib_msg_t *msg)
+int
+lnet_post_send_locked (lnet_msg_t *msg, int do_send)
{
- lib_ni_t *ni = &nal->libnal_ni;
- ptl_size_t mlength = 0;
- ptl_size_t offset = 0;
- lib_md_t *md;
- ptl_hdr_t reply;
- unsigned long flags;
- int rc;
+ /* lnet_send is going to LNET_UNLOCK immediately after this, so it sets
+ * do_send FALSE and I don't do the unlock/send/lock bit. I return
+ * EAGAIN if msg blocked, EHOSTUNREACH if msg_txpeer appears dead, and
+ * 0 if sent or OK to send */
+ lnet_peer_t *lp = msg->msg_txpeer;
+ lnet_ni_t *ni = lp->lp_ni;
+
+ /* non-lnet_send() callers have checked before */
+ LASSERT (!do_send || msg->msg_delayed);
+ LASSERT (!msg->msg_receiving);
+
+ /* NB 'lp' is always the next hop */
+ if ((msg->msg_target.pid & LNET_PID_USERFLAG) == 0 &&
+ lnet_peer_alive_locked(lp) == 0) {
+ LNET_UNLOCK();
+
+ CDEBUG(D_NETERROR, "Dropping message for %s: peer not alive\n",
+ libcfs_id2str(msg->msg_target));
+ if (do_send)
+ lnet_finalize(ni, msg, -EHOSTUNREACH);
+
+ LNET_LOCK();
+ return EHOSTUNREACH;
+ }
- /* Convert get fields to host byte order */
- hdr->msg.get.match_bits = NTOH__u64 (hdr->msg.get.match_bits);
- hdr->msg.get.ptl_index = NTOH__u32 (hdr->msg.get.ptl_index);
- hdr->msg.get.sink_length = NTOH__u32 (hdr->msg.get.sink_length);
- hdr->msg.get.src_offset = NTOH__u32 (hdr->msg.get.src_offset);
+ if (!msg->msg_peertxcredit) {
+ LASSERT ((lp->lp_txcredits < 0) ==
+ !cfs_list_empty(&lp->lp_txq));
- LIB_LOCK(nal, flags);
+ msg->msg_peertxcredit = 1;
+ lp->lp_txqnob += msg->msg_len + sizeof(lnet_hdr_t);
+ lp->lp_txcredits--;
- md = lib_match_md(nal, hdr->msg.get.ptl_index, PTL_MD_OP_GET,
- hdr->src_nid, hdr->src_pid,
- hdr->msg.get.sink_length, hdr->msg.get.src_offset,
- hdr->msg.get.match_bits, msg,
- &mlength, &offset);
- if (md == NULL) {
- LIB_UNLOCK(nal, flags);
- return (PTL_FAIL);
+ if (lp->lp_txcredits < lp->lp_mintxcredits)
+ lp->lp_mintxcredits = lp->lp_txcredits;
+
+ if (lp->lp_txcredits < 0) {
+ msg->msg_delayed = 1;
+ cfs_list_add_tail(&msg->msg_list, &lp->lp_txq);
+ return EAGAIN;
+ }
}
- msg->ev.type = PTL_EVENT_GET_END;
- msg->ev.hdr_data = 0;
+ if (!msg->msg_txcredit) {
+ LASSERT ((ni->ni_txcredits < 0) ==
+ !cfs_list_empty(&ni->ni_txq));
- ni->ni_counters.send_count++;
- ni->ni_counters.send_length += mlength;
+ msg->msg_txcredit = 1;
+ ni->ni_txcredits--;
- LIB_UNLOCK(nal, flags);
+ if (ni->ni_txcredits < ni->ni_mintxcredits)
+ ni->ni_mintxcredits = ni->ni_txcredits;
- memset (&reply, 0, sizeof (reply));
- reply.type = HTON__u32 (PTL_MSG_REPLY);
- reply.dest_nid = HTON__u64 (hdr->src_nid);
- reply.dest_pid = HTON__u32 (hdr->src_pid);
- reply.src_nid = HTON__u64 (ni->ni_pid.nid);
- reply.src_pid = HTON__u32 (ni->ni_pid.pid);
- reply.payload_length = HTON__u32 (mlength);
+ if (ni->ni_txcredits < 0) {
+ msg->msg_delayed = 1;
+ cfs_list_add_tail(&msg->msg_list, &ni->ni_txq);
+ return EAGAIN;
+ }
+ }
- reply.msg.reply.dst_wmd = hdr->msg.get.return_wmd;
+ if (do_send) {
+ LNET_UNLOCK();
+ lnet_ni_send(ni, msg);
+ LNET_LOCK();
+ }
+ return 0;
+}
- /* NB call lib_send() _BEFORE_ lib_recv() completes the incoming
- * message. Some NALs _require_ this to implement optimized GET */
+#ifdef __KERNEL__
+static void
+lnet_commit_routedmsg (lnet_msg_t *msg)
+{
+ /* ALWAYS called holding the LNET_LOCK */
+ LASSERT (msg->msg_routing);
- rc = lib_send (nal, private, msg, &reply, PTL_MSG_REPLY,
- hdr->src_nid, hdr->src_pid, md, offset, mlength);
- if (rc != PTL_OK)
- CERROR(LPU64": Unable to send REPLY for GET from "LPU64": %d\n",
- ni->ni_pid.nid, hdr->src_nid, rc);
+ the_lnet.ln_counters.msgs_alloc++;
+ if (the_lnet.ln_counters.msgs_alloc >
+ the_lnet.ln_counters.msgs_max)
+ the_lnet.ln_counters.msgs_max =
+ the_lnet.ln_counters.msgs_alloc;
- /* Discard any junk after the hdr */
- (void) lib_recv(nal, private, NULL, NULL, 0, 0, hdr->payload_length);
+ the_lnet.ln_counters.route_count++;
+ the_lnet.ln_counters.route_length += msg->msg_len;
- return (rc);
+ LASSERT (!msg->msg_onactivelist);
+ msg->msg_onactivelist = 1;
+ cfs_list_add (&msg->msg_activelist, &the_lnet.ln_active_msgs);
}
-static ptl_err_t
-parse_reply(lib_nal_t *nal, ptl_hdr_t *hdr, void *private, lib_msg_t *msg)
+lnet_rtrbufpool_t *
+lnet_msg2bufpool(lnet_msg_t *msg)
{
- lib_ni_t *ni = &nal->libnal_ni;
- lib_md_t *md;
- int rlength;
- int length;
- unsigned long flags;
- ptl_err_t rc;
+ lnet_rtrbufpool_t *rbp = &the_lnet.ln_rtrpools[0];
- LIB_LOCK(nal, flags);
+ LASSERT (msg->msg_len <= LNET_MTU);
+ while (msg->msg_len > (unsigned int)rbp->rbp_npages * CFS_PAGE_SIZE) {
+ rbp++;
+ LASSERT (rbp < &the_lnet.ln_rtrpools[LNET_NRBPOOLS]);
+ }
- /* NB handles only looked up by creator (no flips) */
- md = ptl_wire_handle2md(&hdr->msg.reply.dst_wmd, nal);
- if (md == NULL || md->threshold == 0) {
- CERROR (LPU64": Dropping REPLY from "LPU64" for %s MD "LPX64"."LPX64"\n",
- ni->ni_pid.nid, hdr->src_nid,
- md == NULL ? "invalid" : "inactive",
- hdr->msg.reply.dst_wmd.wh_interface_cookie,
- hdr->msg.reply.dst_wmd.wh_object_cookie);
-
- LIB_UNLOCK(nal, flags);
- return (PTL_FAIL);
- }
-
- LASSERT (md->offset == 0);
-
- length = rlength = hdr->payload_length;
-
- if (length > md->length) {
- if ((md->options & PTL_MD_TRUNCATE) == 0) {
- CERROR (LPU64": Dropping REPLY from "LPU64
- " length %d for MD "LPX64" would overflow (%d)\n",
- ni->ni_pid.nid, hdr->src_nid, length,
- hdr->msg.reply.dst_wmd.wh_object_cookie,
- md->length);
- LIB_UNLOCK(nal, flags);
- return (PTL_FAIL);
+ return rbp;
+}
+
+int
+lnet_post_routed_recv_locked (lnet_msg_t *msg, int do_recv)
+{
+ /* lnet_parse is going to LNET_UNLOCK immediately after this, so it
+ * sets do_recv FALSE and I don't do the unlock/send/lock bit. I
+ * return EAGAIN if msg blocked and 0 if received or OK to receive */
+ lnet_peer_t *lp = msg->msg_rxpeer;
+ lnet_rtrbufpool_t *rbp;
+ lnet_rtrbuf_t *rb;
+
+ LASSERT (msg->msg_iov == NULL);
+ LASSERT (msg->msg_kiov == NULL);
+ LASSERT (msg->msg_niov == 0);
+ LASSERT (msg->msg_routing);
+ LASSERT (msg->msg_receiving);
+ LASSERT (!msg->msg_sending);
+
+ /* non-lnet_parse callers only send delayed messages */
+ LASSERT (!do_recv || msg->msg_delayed);
+
+ if (!msg->msg_peerrtrcredit) {
+ LASSERT ((lp->lp_rtrcredits < 0) ==
+ !cfs_list_empty(&lp->lp_rtrq));
+
+ msg->msg_peerrtrcredit = 1;
+ lp->lp_rtrcredits--;
+ if (lp->lp_rtrcredits < lp->lp_minrtrcredits)
+ lp->lp_minrtrcredits = lp->lp_rtrcredits;
+
+ if (lp->lp_rtrcredits < 0) {
+ /* must have checked eager_recv before here */
+ LASSERT (msg->msg_delayed);
+ cfs_list_add_tail(&msg->msg_list, &lp->lp_rtrq);
+ return EAGAIN;
}
- length = md->length;
}
- CDEBUG(D_NET, "Reply from "LPU64" of length %d/%d into md "LPX64"\n",
- hdr->src_nid, length, rlength,
- hdr->msg.reply.dst_wmd.wh_object_cookie);
+ rbp = lnet_msg2bufpool(msg);
- lib_commit_md(nal, md, msg);
+ if (!msg->msg_rtrcredit) {
+ LASSERT ((rbp->rbp_credits < 0) ==
+ !cfs_list_empty(&rbp->rbp_msgs));
- msg->ev.type = PTL_EVENT_REPLY_END;
- msg->ev.initiator.nid = hdr->src_nid;
- msg->ev.initiator.pid = hdr->src_pid;
- msg->ev.rlength = rlength;
- msg->ev.mlength = length;
- msg->ev.offset = 0;
+ msg->msg_rtrcredit = 1;
+ rbp->rbp_credits--;
+ if (rbp->rbp_credits < rbp->rbp_mincredits)
+ rbp->rbp_mincredits = rbp->rbp_credits;
- lib_md_deconstruct(nal, md, &msg->ev.mem_desc);
-
- ni->ni_counters.recv_count++;
- ni->ni_counters.recv_length += length;
+ if (rbp->rbp_credits < 0) {
+ /* must have checked eager_recv before here */
+ LASSERT (msg->msg_delayed);
+ cfs_list_add_tail(&msg->msg_list, &rbp->rbp_msgs);
+ return EAGAIN;
+ }
+ }
- LIB_UNLOCK(nal, flags);
+ LASSERT (!cfs_list_empty(&rbp->rbp_bufs));
+ rb = cfs_list_entry(rbp->rbp_bufs.next, lnet_rtrbuf_t, rb_list);
+ cfs_list_del(&rb->rb_list);
- rc = lib_recv(nal, private, msg, md, 0, length, rlength);
- if (rc != PTL_OK)
- CERROR(LPU64": error on receiving REPLY from "LPU64": %d\n",
- ni->ni_pid.nid, hdr->src_nid, rc);
+ msg->msg_niov = rbp->rbp_npages;
+ msg->msg_kiov = &rb->rb_kiov[0];
- return (rc);
+ if (do_recv) {
+ LNET_UNLOCK();
+ lnet_ni_recv(lp->lp_ni, msg->msg_private, msg, 1,
+ 0, msg->msg_len, msg->msg_len);
+ LNET_LOCK();
+ }
+ return 0;
}
+#endif
-static ptl_err_t
-parse_ack(lib_nal_t *nal, ptl_hdr_t *hdr, void *private, lib_msg_t *msg)
+void
+lnet_return_credits_locked (lnet_msg_t *msg)
{
- lib_ni_t *ni = &nal->libnal_ni;
- lib_md_t *md;
- unsigned long flags;
+ lnet_peer_t *txpeer = msg->msg_txpeer;
+ lnet_peer_t *rxpeer = msg->msg_rxpeer;
+ lnet_msg_t *msg2;
+ lnet_ni_t *ni;
- /* Convert ack fields to host byte order */
- hdr->msg.ack.match_bits = NTOH__u64 (hdr->msg.ack.match_bits);
- hdr->msg.ack.mlength = NTOH__u32 (hdr->msg.ack.mlength);
+ if (msg->msg_txcredit) {
+ /* give back NI txcredits */
+ msg->msg_txcredit = 0;
+ ni = txpeer->lp_ni;
- LIB_LOCK(nal, flags);
+ LASSERT((ni->ni_txcredits < 0) == !cfs_list_empty(&ni->ni_txq));
- /* NB handles only looked up by creator (no flips) */
- md = ptl_wire_handle2md(&hdr->msg.ack.dst_wmd, nal);
- if (md == NULL || md->threshold == 0) {
- CDEBUG(D_INFO, LPU64": Dropping ACK from "LPU64" to %s MD "
- LPX64"."LPX64"\n", ni->ni_pid.nid, hdr->src_nid,
- (md == NULL) ? "invalid" : "inactive",
- hdr->msg.ack.dst_wmd.wh_interface_cookie,
- hdr->msg.ack.dst_wmd.wh_object_cookie);
+ ni->ni_txcredits++;
+ if (ni->ni_txcredits <= 0) {
+ msg2 = cfs_list_entry(ni->ni_txq.next, lnet_msg_t,
+ msg_list);
+ cfs_list_del(&msg2->msg_list);
+
+ LASSERT(msg2->msg_txpeer->lp_ni == ni);
+ LASSERT(msg2->msg_delayed);
- LIB_UNLOCK(nal, flags);
- return (PTL_FAIL);
+ (void) lnet_post_send_locked(msg2, 1);
+ }
}
- CDEBUG(D_NET, LPU64": ACK from "LPU64" into md "LPX64"\n",
- ni->ni_pid.nid, hdr->src_nid,
- hdr->msg.ack.dst_wmd.wh_object_cookie);
+ if (msg->msg_peertxcredit) {
+ /* give back peer txcredits */
+ msg->msg_peertxcredit = 0;
- lib_commit_md(nal, md, msg);
+ LASSERT((txpeer->lp_txcredits < 0) ==
+ !cfs_list_empty(&txpeer->lp_txq));
- msg->ev.type = PTL_EVENT_ACK;
- msg->ev.initiator.nid = hdr->src_nid;
- msg->ev.initiator.pid = hdr->src_pid;
- msg->ev.mlength = hdr->msg.ack.mlength;
- msg->ev.match_bits = hdr->msg.ack.match_bits;
+ txpeer->lp_txqnob -= msg->msg_len + sizeof(lnet_hdr_t);
+ LASSERT (txpeer->lp_txqnob >= 0);
- lib_md_deconstruct(nal, md, &msg->ev.mem_desc);
+ txpeer->lp_txcredits++;
+ if (txpeer->lp_txcredits <= 0) {
+ msg2 = cfs_list_entry(txpeer->lp_txq.next,
+ lnet_msg_t, msg_list);
+ cfs_list_del(&msg2->msg_list);
- ni->ni_counters.recv_count++;
+ LASSERT (msg2->msg_txpeer == txpeer);
+ LASSERT (msg2->msg_delayed);
- LIB_UNLOCK(nal, flags);
-
- /* We have received and matched up the ack OK, create the
- * completion event now... */
- lib_finalize(nal, private, msg, PTL_OK);
+ (void) lnet_post_send_locked(msg2, 1);
+ }
+ }
- /* ...and now discard any junk after the hdr */
- (void) lib_recv(nal, private, NULL, NULL, 0, 0, hdr->payload_length);
-
- return (PTL_OK);
-}
+ if (txpeer != NULL) {
+ msg->msg_txpeer = NULL;
+ lnet_peer_decref_locked(txpeer);
+ }
-static char *
-hdr_type_string (ptl_hdr_t *hdr)
-{
- switch (hdr->type) {
- case PTL_MSG_ACK:
- return ("ACK");
- case PTL_MSG_PUT:
- return ("PUT");
- case PTL_MSG_GET:
- return ("GET");
- case PTL_MSG_REPLY:
- return ("REPLY");
- case PTL_MSG_HELLO:
- return ("HELLO");
- default:
- return ("<UNKNOWN>");
+#ifdef __KERNEL__
+ if (msg->msg_rtrcredit) {
+ /* give back global router credits */
+ lnet_rtrbuf_t *rb;
+ lnet_rtrbufpool_t *rbp;
+
+ /* NB If a msg ever blocks for a buffer in rbp_msgs, it stays
+ * there until it gets one allocated, or aborts the wait
+ * itself */
+ LASSERT (msg->msg_kiov != NULL);
+
+ rb = cfs_list_entry(msg->msg_kiov, lnet_rtrbuf_t, rb_kiov[0]);
+ rbp = rb->rb_pool;
+ LASSERT (rbp == lnet_msg2bufpool(msg));
+
+ msg->msg_kiov = NULL;
+ msg->msg_rtrcredit = 0;
+
+ LASSERT((rbp->rbp_credits < 0) ==
+ !cfs_list_empty(&rbp->rbp_msgs));
+ LASSERT((rbp->rbp_credits > 0) ==
+ !cfs_list_empty(&rbp->rbp_bufs));
+
+ cfs_list_add(&rb->rb_list, &rbp->rbp_bufs);
+ rbp->rbp_credits++;
+ if (rbp->rbp_credits <= 0) {
+ msg2 = cfs_list_entry(rbp->rbp_msgs.next,
+ lnet_msg_t, msg_list);
+ cfs_list_del(&msg2->msg_list);
+
+ (void) lnet_post_routed_recv_locked(msg2, 1);
+ }
}
-}
-void print_hdr(lib_nal_t *nal, ptl_hdr_t * hdr)
-{
- char *type_str = hdr_type_string (hdr);
+ if (msg->msg_peerrtrcredit) {
+ /* give back peer router credits */
+ msg->msg_peerrtrcredit = 0;
- CWARN("P3 Header at %p of type %s\n", hdr, type_str);
- CWARN(" From nid/pid "LPX64"/%u", hdr->src_nid, hdr->src_pid);
- CWARN(" To nid/pid "LPX64"/%u\n", hdr->dest_nid, hdr->dest_pid);
+ LASSERT((rxpeer->lp_rtrcredits < 0) ==
+ !cfs_list_empty(&rxpeer->lp_rtrq));
- switch (hdr->type) {
- default:
- break;
+ rxpeer->lp_rtrcredits++;
+ if (rxpeer->lp_rtrcredits <= 0) {
+ msg2 = cfs_list_entry(rxpeer->lp_rtrq.next,
+ lnet_msg_t, msg_list);
+ cfs_list_del(&msg2->msg_list);
- case PTL_MSG_PUT:
+ (void) lnet_post_routed_recv_locked(msg2, 1);
+ }
+ }
+#else
+ LASSERT (!msg->msg_rtrcredit);
+ LASSERT (!msg->msg_peerrtrcredit);
+#endif
+ if (rxpeer != NULL) {
+ msg->msg_rxpeer = NULL;
+ lnet_peer_decref_locked(rxpeer);
+ }
+}
+
+int
+lnet_send(lnet_nid_t src_nid, lnet_msg_t *msg)
+{
+ lnet_nid_t dst_nid = msg->msg_target.nid;
+ lnet_ni_t *src_ni;
+ lnet_ni_t *local_ni;
+ lnet_remotenet_t *rnet;
+ lnet_route_t *route;
+ lnet_route_t *best_route;
+ cfs_list_t *tmp;
+ lnet_peer_t *lp;
+ lnet_peer_t *lp2;
+ int rc;
+
+ LASSERT (msg->msg_txpeer == NULL);
+ LASSERT (!msg->msg_sending);
+ LASSERT (!msg->msg_target_is_router);
+ LASSERT (!msg->msg_receiving);
+
+ msg->msg_sending = 1;
+
+ /* NB! ni != NULL == interface pre-determined (ACK/REPLY) */
+
+ LNET_LOCK();
+
+ if (the_lnet.ln_shutdown) {
+ LNET_UNLOCK();
+ return -ESHUTDOWN;
+ }
+
+ if (src_nid == LNET_NID_ANY) {
+ src_ni = NULL;
+ } else {
+ src_ni = lnet_nid2ni_locked(src_nid);
+ if (src_ni == NULL) {
+ LNET_UNLOCK();
+ CERROR("Can't send to %s: src %s is not a local nid\n",
+ libcfs_nid2str(dst_nid), libcfs_nid2str(src_nid));
+ return -EINVAL;
+ }
+ LASSERT (!msg->msg_routing);
+ }
+
+ /* Is this for someone on a local network? */
+ local_ni = lnet_net2ni_locked(LNET_NIDNET(dst_nid));
+
+ if (local_ni != NULL) {
+ if (src_ni == NULL) {
+ src_ni = local_ni;
+ src_nid = src_ni->ni_nid;
+ } else if (src_ni == local_ni) {
+ lnet_ni_decref_locked(local_ni);
+ } else {
+ lnet_ni_decref_locked(local_ni);
+ lnet_ni_decref_locked(src_ni);
+ LNET_UNLOCK();
+ CERROR("No route to %s via from %s\n",
+ libcfs_nid2str(dst_nid), libcfs_nid2str(src_nid));
+ return -EINVAL;
+ }
+
+ LASSERT (src_nid != LNET_NID_ANY);
+
+ if (!msg->msg_routing)
+ msg->msg_hdr.src_nid = cpu_to_le64(src_nid);
+
+ if (src_ni == the_lnet.ln_loni) {
+ /* No send credit hassles with LOLND */
+ LNET_UNLOCK();
+ lnet_ni_send(src_ni, msg);
+ lnet_ni_decref(src_ni);
+ return 0;
+ }
+
+ rc = lnet_nid2peer_locked(&lp, dst_nid);
+ lnet_ni_decref_locked(src_ni); /* lp has ref on src_ni; lose mine */
+ if (rc != 0) {
+ LNET_UNLOCK();
+ CERROR("Error %d finding peer %s\n", rc,
+ libcfs_nid2str(dst_nid));
+ /* ENOMEM or shutting down */
+ return rc;
+ }
+ LASSERT (lp->lp_ni == src_ni);
+ } else {
+#ifndef __KERNEL__
+ LNET_UNLOCK();
+
+ /* NB
+ * - once application finishes computation, check here to update
+ * router states before it waits for pending IO in LNetEQPoll
+ * - recursion breaker: router checker sends no message
+ * to remote networks */
+ if (the_lnet.ln_rc_state == LNET_RC_STATE_RUNNING)
+ lnet_router_checker();
+
+ LNET_LOCK();
+#endif
+ /* sending to a remote network */
+ rnet = lnet_find_net_locked(LNET_NIDNET(dst_nid));
+ if (rnet == NULL) {
+ if (src_ni != NULL)
+ lnet_ni_decref_locked(src_ni);
+ LNET_UNLOCK();
+ CERROR("No route to %s\n", libcfs_id2str(msg->msg_target));
+ return -EHOSTUNREACH;
+ }
+
+ /* Find the best gateway I can use */
+ lp = NULL;
+ best_route = NULL;
+ cfs_list_for_each(tmp, &rnet->lrn_routes) {
+ route = cfs_list_entry(tmp, lnet_route_t, lr_list);
+ lp2 = route->lr_gateway;
+
+ if (lp2->lp_alive &&
+ lnet_router_down_ni(lp2, rnet->lrn_net) <= 0 &&
+ (src_ni == NULL || lp2->lp_ni == src_ni) &&
+ (lp == NULL ||
+ lnet_compare_routes(route, best_route) > 0)) {
+ best_route = route;
+ lp = lp2;
+ }
+ }
+
+ if (lp == NULL) {
+ if (src_ni != NULL)
+ lnet_ni_decref_locked(src_ni);
+ LNET_UNLOCK();
+
+ CERROR("No route to %s via %s (all routers down)\n",
+ libcfs_id2str(msg->msg_target),
+ libcfs_nid2str(src_nid));
+ return -EHOSTUNREACH;
+ }
+
+ /* Place selected route at the end of the route list to ensure
+ * fairness; everything else being equal... */
+ cfs_list_del(&best_route->lr_list);
+ cfs_list_add_tail(&best_route->lr_list, &rnet->lrn_routes);
+
+ if (src_ni == NULL) {
+ src_ni = lp->lp_ni;
+ src_nid = src_ni->ni_nid;
+ } else {
+ LASSERT (src_ni == lp->lp_ni);
+ lnet_ni_decref_locked(src_ni);
+ }
+
+ lnet_peer_addref_locked(lp);
+
+ LASSERT (src_nid != LNET_NID_ANY);
+
+ if (!msg->msg_routing) {
+ /* I'm the source and now I know which NI to send on */
+ msg->msg_hdr.src_nid = cpu_to_le64(src_nid);
+ }
+
+ msg->msg_target_is_router = 1;
+ msg->msg_target.nid = lp->lp_nid;
+ msg->msg_target.pid = LUSTRE_SRV_LNET_PID;
+ }
+
+ /* 'lp' is our best choice of peer */
+
+ LASSERT (!msg->msg_peertxcredit);
+ LASSERT (!msg->msg_txcredit);
+ LASSERT (msg->msg_txpeer == NULL);
+
+ msg->msg_txpeer = lp; /* msg takes my ref on lp */
+
+ rc = lnet_post_send_locked(msg, 0);
+ LNET_UNLOCK();
+
+ if (rc == EHOSTUNREACH)
+ return -EHOSTUNREACH;
+
+ if (rc == 0)
+ lnet_ni_send(src_ni, msg);
+
+ return 0;
+}
+
+static void
+lnet_commit_md (lnet_libmd_t *md, lnet_msg_t *msg)
+{
+ /* ALWAYS called holding the LNET_LOCK */
+ /* Here, we commit the MD to a network OP by marking it busy and
+ * decrementing its threshold. Come what may, the network "owns"
+ * the MD until a call to lnet_finalize() signals completion. */
+ LASSERT (!msg->msg_routing);
+
+ msg->msg_md = md;
+
+ md->md_refcount++;
+ if (md->md_threshold != LNET_MD_THRESH_INF) {
+ LASSERT (md->md_threshold > 0);
+ md->md_threshold--;
+ }
+
+ the_lnet.ln_counters.msgs_alloc++;
+ if (the_lnet.ln_counters.msgs_alloc >
+ the_lnet.ln_counters.msgs_max)
+ the_lnet.ln_counters.msgs_max =
+ the_lnet.ln_counters.msgs_alloc;
+
+ LASSERT (!msg->msg_onactivelist);
+ msg->msg_onactivelist = 1;
+ cfs_list_add (&msg->msg_activelist, &the_lnet.ln_active_msgs);
+}
+
+static void
+lnet_drop_message (lnet_ni_t *ni, void *private, unsigned int nob)
+{
+ LNET_LOCK();
+ the_lnet.ln_counters.drop_count++;
+ the_lnet.ln_counters.drop_length += nob;
+ LNET_UNLOCK();
+
+ lnet_ni_recv(ni, private, NULL, 0, 0, 0, nob);
+}
+
+static void
+lnet_drop_delayed_put(lnet_msg_t *msg, char *reason)
+{
+ lnet_process_id_t id = {0};
+
+ id.nid = msg->msg_hdr.src_nid;
+ id.pid = msg->msg_hdr.src_pid;
+
+ LASSERT (msg->msg_md == NULL);
+ LASSERT (msg->msg_delayed);
+ LASSERT (msg->msg_rxpeer != NULL);
+ LASSERT (msg->msg_hdr.type == LNET_MSG_PUT);
+
+ CWARN("Dropping delayed PUT from %s portal %d match "LPU64
+ " offset %d length %d: %s\n",
+ libcfs_id2str(id),
+ msg->msg_hdr.msg.put.ptl_index,
+ msg->msg_hdr.msg.put.match_bits,
+ msg->msg_hdr.msg.put.offset,
+ msg->msg_hdr.payload_length,
+ reason);
+
+ /* NB I can't drop msg's ref on msg_rxpeer until after I've
+ * called lnet_drop_message(), so I just hang onto msg as well
+ * until that's done */
+
+ lnet_drop_message(msg->msg_rxpeer->lp_ni,
+ msg->msg_private, msg->msg_len);
+
+ LNET_LOCK();
+
+ lnet_peer_decref_locked(msg->msg_rxpeer);
+ msg->msg_rxpeer = NULL;
+
+ lnet_msg_free(msg);
+
+ LNET_UNLOCK();
+}
+
+/**
+ * Turn on the lazy portal attribute. Use with caution!
+ *
+ * This portal attribute only affects incoming PUT requests to the portal,
+ * and is off by default. By default, if there's no matching MD for an
+ * incoming PUT request, it is simply dropped. With the lazy attribute on,
+ * such requests are queued indefinitely until either a matching MD is
+ * posted to the portal or the lazy attribute is turned off.
+ *
+ * It would prevent dropped requests, however it should be regarded as the
+ * last line of defense - i.e. users must keep a close watch on active
+ * buffers on a lazy portal and once it becomes too low post more buffers as
+ * soon as possible. This is because delayed requests usually have detrimental
+ * effects on underlying network connections. A few delayed requests often
+ * suffice to bring an underlying connection to a complete halt, due to flow
+ * control mechanisms.
+ *
+ * There's also a DOS attack risk. If users don't post match-all MDs on a
+ * lazy portal, a malicious peer can easily stop a service by sending some
+ * PUT requests with match bits that won't match any MD. A routed server is
+ * especially vulnerable since the connections to its neighbor routers are
+ * shared among all clients.
+ *
+ * \param portal Index of the portal to enable the lazy attribute on.
+ *
+ * \retval 0 On success.
+ * \retval -EINVAL If \a portal is not a valid index.
+ */
+int
+LNetSetLazyPortal(int portal)
+{
+ lnet_portal_t *ptl = &the_lnet.ln_portals[portal];
+
+ if (portal < 0 || portal >= the_lnet.ln_nportals)
+ return -EINVAL;
+
+ CDEBUG(D_NET, "Setting portal %d lazy\n", portal);
+
+ LNET_LOCK();
+ lnet_portal_setopt(ptl, LNET_PTL_LAZY);
+ LNET_UNLOCK();
+
+ return 0;
+}
+
+/**
+ * Turn off the lazy portal attribute. Delayed requests on the portal,
+ * if any, will be all dropped when this function returns.
+ *
+ * \param portal Index of the portal to disable the lazy attribute on.
+ *
+ * \retval 0 On success.
+ * \retval -EINVAL If \a portal is not a valid index.
+ */
+int
+LNetClearLazyPortal(int portal)
+{
+ cfs_list_t zombies;
+ lnet_portal_t *ptl = &the_lnet.ln_portals[portal];
+ lnet_msg_t *msg;
+
+ if (portal < 0 || portal >= the_lnet.ln_nportals)
+ return -EINVAL;
+
+ LNET_LOCK();
+
+ if (!lnet_portal_is_lazy(ptl)) {
+ LNET_UNLOCK();
+ return 0;
+ }
+
+ if (the_lnet.ln_shutdown)
+ CWARN ("Active lazy portal %d on exit\n", portal);
+ else
+ CDEBUG (D_NET, "clearing portal %d lazy\n", portal);
+
+ /* grab all the blocked messages atomically */
+ cfs_list_add(&zombies, &ptl->ptl_msgq);
+ cfs_list_del_init(&ptl->ptl_msgq);
+
+ ptl->ptl_msgq_version++;
+ lnet_portal_unsetopt(ptl, LNET_PTL_LAZY);
+
+ LNET_UNLOCK();
+
+ while (!cfs_list_empty(&zombies)) {
+ msg = cfs_list_entry(zombies.next, lnet_msg_t, msg_list);
+ cfs_list_del(&msg->msg_list);
+
+ lnet_drop_delayed_put(msg, "Clearing lazy portal attr");
+ }
+
+ return 0;
+}
+
+static void
+lnet_recv_put(lnet_libmd_t *md, lnet_msg_t *msg, int delayed,
+ unsigned int offset, unsigned int mlength)
+{
+ lnet_hdr_t *hdr = &msg->msg_hdr;
+
+ LNET_LOCK();
+
+ the_lnet.ln_counters.recv_count++;
+ the_lnet.ln_counters.recv_length += mlength;
+
+ LNET_UNLOCK();
+
+ if (mlength != 0)
+ lnet_setpayloadbuffer(msg);
+
+ msg->msg_ev.type = LNET_EVENT_PUT;
+ msg->msg_ev.target.pid = hdr->dest_pid;
+ msg->msg_ev.target.nid = hdr->dest_nid;
+ msg->msg_ev.hdr_data = hdr->msg.put.hdr_data;
+
+ /* Must I ACK? If so I'll grab the ack_wmd out of the header and put
+ * it back into the ACK during lnet_finalize() */
+ msg->msg_ack = (!lnet_is_wire_handle_none(&hdr->msg.put.ack_wmd) &&
+ (md->md_options & LNET_MD_ACK_DISABLE) == 0);
+
+ lnet_ni_recv(msg->msg_rxpeer->lp_ni,
+ msg->msg_private,
+ msg, delayed, offset, mlength,
+ hdr->payload_length);
+}
+
+/* called with LNET_LOCK held */
+void
+lnet_match_blocked_msg(lnet_libmd_t *md)
+{
+ CFS_LIST_HEAD (drops);
+ CFS_LIST_HEAD (matches);
+ cfs_list_t *tmp;
+ cfs_list_t *entry;
+ lnet_msg_t *msg;
+ lnet_portal_t *ptl;
+ lnet_me_t *me = md->md_me;
+
+ LASSERT (me->me_portal < (unsigned int)the_lnet.ln_nportals);
+
+ ptl = &the_lnet.ln_portals[me->me_portal];
+ if (!lnet_portal_is_lazy(ptl)) {
+ LASSERT (cfs_list_empty(&ptl->ptl_msgq));
+ return;
+ }
+
+ LASSERT (md->md_refcount == 0); /* a brand new MD */
+
+ cfs_list_for_each_safe (entry, tmp, &ptl->ptl_msgq) {
+ int rc;
+ int index;
+ unsigned int mlength;
+ unsigned int offset;
+ lnet_hdr_t *hdr;
+ lnet_process_id_t src;
+
+ msg = cfs_list_entry(entry, lnet_msg_t, msg_list);
+
+ LASSERT (msg->msg_delayed);
+
+ hdr = &msg->msg_hdr;
+ index = hdr->msg.put.ptl_index;
+
+ src.nid = hdr->src_nid;
+ src.pid = hdr->src_pid;
+
+ rc = lnet_try_match_md(index, LNET_MD_OP_PUT, src,
+ hdr->payload_length,
+ hdr->msg.put.offset,
+ hdr->msg.put.match_bits,
+ md, msg, &mlength, &offset);
+
+ if (rc == LNET_MATCHMD_NONE)
+ continue;
+
+ /* Hurrah! This _is_ a match */
+ cfs_list_del(&msg->msg_list);
+ ptl->ptl_msgq_version++;
+
+ if (rc == LNET_MATCHMD_OK) {
+ cfs_list_add_tail(&msg->msg_list, &matches);
+
+ CDEBUG(D_NET, "Resuming delayed PUT from %s portal %d "
+ "match "LPU64" offset %d length %d.\n",
+ libcfs_id2str(src),
+ hdr->msg.put.ptl_index,
+ hdr->msg.put.match_bits,
+ hdr->msg.put.offset,
+ hdr->payload_length);
+ } else {
+ LASSERT (rc == LNET_MATCHMD_DROP);
+
+ cfs_list_add_tail(&msg->msg_list, &drops);
+ }
+
+ if (lnet_md_exhausted(md))
+ break;
+ }
+
+ LNET_UNLOCK();
+
+ cfs_list_for_each_safe (entry, tmp, &drops) {
+ msg = cfs_list_entry(entry, lnet_msg_t, msg_list);
+
+ cfs_list_del(&msg->msg_list);
+
+ lnet_drop_delayed_put(msg, "Bad match");
+ }
+
+ cfs_list_for_each_safe (entry, tmp, &matches) {
+ msg = cfs_list_entry(entry, lnet_msg_t, msg_list);
+
+ cfs_list_del(&msg->msg_list);
+
+ /* md won't disappear under me, since each msg
+ * holds a ref on it */
+ lnet_recv_put(md, msg, 1,
+ msg->msg_ev.offset,
+ msg->msg_ev.mlength);
+ }
+
+ LNET_LOCK();
+}
+
+static int
+lnet_parse_put(lnet_ni_t *ni, lnet_msg_t *msg)
+{
+ int rc;
+ int index;
+ __u64 version;
+ lnet_hdr_t *hdr = &msg->msg_hdr;
+ unsigned int rlength = hdr->payload_length;
+ unsigned int mlength = 0;
+ unsigned int offset = 0;
+ lnet_process_id_t src= {0};
+ lnet_libmd_t *md;
+ lnet_portal_t *ptl;
+
+ src.nid = hdr->src_nid;
+ src.pid = hdr->src_pid;
+
+ /* Convert put fields to host byte order */
+ hdr->msg.put.match_bits = le64_to_cpu(hdr->msg.put.match_bits);
+ hdr->msg.put.ptl_index = le32_to_cpu(hdr->msg.put.ptl_index);
+ hdr->msg.put.offset = le32_to_cpu(hdr->msg.put.offset);
+
+ index = hdr->msg.put.ptl_index;
+
+ LNET_LOCK();
+
+ again:
+ rc = lnet_match_md(index, LNET_MD_OP_PUT, src,
+ rlength, hdr->msg.put.offset,
+ hdr->msg.put.match_bits, msg,
+ &mlength, &offset, &md);
+ switch (rc) {
+ default:
+ LBUG();
+
+ case LNET_MATCHMD_OK:
+ LNET_UNLOCK();
+ lnet_recv_put(md, msg, msg->msg_delayed, offset, mlength);
+ return 0;
+
+ case LNET_MATCHMD_NONE:
+ ptl = &the_lnet.ln_portals[index];
+ version = ptl->ptl_ml_version;
+
+ rc = 0;
+ if (!msg->msg_delayed)
+ rc = lnet_eager_recv_locked(msg);
+
+ if (rc == 0 &&
+ !the_lnet.ln_shutdown &&
+ lnet_portal_is_lazy(ptl)) {
+ if (version != ptl->ptl_ml_version)
+ goto again;
+
+ cfs_list_add_tail(&msg->msg_list, &ptl->ptl_msgq);
+ ptl->ptl_msgq_version++;
+ LNET_UNLOCK();
+
+ CDEBUG(D_NET, "Delaying PUT from %s portal %d match "
+ LPU64" offset %d length %d: no match \n",
+ libcfs_id2str(src), index,
+ hdr->msg.put.match_bits,
+ hdr->msg.put.offset, rlength);
+ return 0;
+ }
+ /* fall through */
+
+ case LNET_MATCHMD_DROP:
+ CDEBUG(D_NETERROR,
+ "Dropping PUT from %s portal %d match "LPU64
+ " offset %d length %d: %d\n",
+ libcfs_id2str(src), index,
+ hdr->msg.put.match_bits,
+ hdr->msg.put.offset, rlength, rc);
+ LNET_UNLOCK();
+
+ return ENOENT; /* +ve: OK but no match */
+ }
+}
+
+static int
+lnet_parse_get(lnet_ni_t *ni, lnet_msg_t *msg, int rdma_get)
+{
+ lnet_hdr_t *hdr = &msg->msg_hdr;
+ unsigned int mlength = 0;
+ unsigned int offset = 0;
+ lnet_process_id_t src = {0};
+ lnet_handle_wire_t reply_wmd;
+ lnet_libmd_t *md;
+ int rc;
+
+ src.nid = hdr->src_nid;
+ src.pid = hdr->src_pid;
+
+ /* Convert get fields to host byte order */
+ hdr->msg.get.match_bits = le64_to_cpu(hdr->msg.get.match_bits);
+ hdr->msg.get.ptl_index = le32_to_cpu(hdr->msg.get.ptl_index);
+ hdr->msg.get.sink_length = le32_to_cpu(hdr->msg.get.sink_length);
+ hdr->msg.get.src_offset = le32_to_cpu(hdr->msg.get.src_offset);
+
+ LNET_LOCK();
+
+ rc = lnet_match_md(hdr->msg.get.ptl_index, LNET_MD_OP_GET, src,
+ hdr->msg.get.sink_length, hdr->msg.get.src_offset,
+ hdr->msg.get.match_bits, msg,
+ &mlength, &offset, &md);
+ if (rc == LNET_MATCHMD_DROP) {
+ CDEBUG(D_NETERROR,
+ "Dropping GET from %s portal %d match "LPU64
+ " offset %d length %d\n",
+ libcfs_id2str(src),
+ hdr->msg.get.ptl_index,
+ hdr->msg.get.match_bits,
+ hdr->msg.get.src_offset,
+ hdr->msg.get.sink_length);
+ LNET_UNLOCK();
+ return ENOENT; /* +ve: OK but no match */
+ }
+
+ LASSERT (rc == LNET_MATCHMD_OK);
+
+ the_lnet.ln_counters.send_count++;
+ the_lnet.ln_counters.send_length += mlength;
+
+ LNET_UNLOCK();
+
+ msg->msg_ev.type = LNET_EVENT_GET;
+ msg->msg_ev.target.pid = hdr->dest_pid;
+ msg->msg_ev.target.nid = hdr->dest_nid;
+ msg->msg_ev.hdr_data = 0;
+
+ reply_wmd = hdr->msg.get.return_wmd;
+
+ lnet_prep_send(msg, LNET_MSG_REPLY, src, offset, mlength);
+
+ msg->msg_hdr.msg.reply.dst_wmd = reply_wmd;
+
+ if (rdma_get) {
+ /* The LND completes the REPLY from her recv procedure */
+ lnet_ni_recv(ni, msg->msg_private, msg, 0,
+ msg->msg_offset, msg->msg_len, msg->msg_len);
+ return 0;
+ }
+
+ lnet_ni_recv(ni, msg->msg_private, NULL, 0, 0, 0, 0);
+ msg->msg_receiving = 0;
+
+ rc = lnet_send(ni->ni_nid, msg);
+ if (rc < 0) {
+ /* didn't get as far as lnet_ni_send() */
+ CERROR("%s: Unable to send REPLY for GET from %s: %d\n",
+ libcfs_nid2str(ni->ni_nid), libcfs_id2str(src), rc);
+
+ lnet_finalize(ni, msg, rc);
+ }
+
+ return 0;
+}
+
+static int
+lnet_parse_reply(lnet_ni_t *ni, lnet_msg_t *msg)
+{
+ void *private = msg->msg_private;
+ lnet_hdr_t *hdr = &msg->msg_hdr;
+ lnet_process_id_t src = {0};
+ lnet_libmd_t *md;
+ int rlength;
+ int mlength;
+
+ LNET_LOCK();
+
+ src.nid = hdr->src_nid;
+ src.pid = hdr->src_pid;
+
+ /* NB handles only looked up by creator (no flips) */
+ md = lnet_wire_handle2md(&hdr->msg.reply.dst_wmd);
+ if (md == NULL || md->md_threshold == 0 || md->md_me != NULL) {
+ CDEBUG(D_NETERROR, "%s: Dropping REPLY from %s for %s "
+ "MD "LPX64"."LPX64"\n",
+ libcfs_nid2str(ni->ni_nid), libcfs_id2str(src),
+ (md == NULL) ? "invalid" : "inactive",
+ hdr->msg.reply.dst_wmd.wh_interface_cookie,
+ hdr->msg.reply.dst_wmd.wh_object_cookie);
+ if (md != NULL && md->md_me != NULL)
+ CERROR("REPLY MD also attached to portal %d\n",
+ md->md_me->me_portal);
+
+ LNET_UNLOCK();
+ return ENOENT; /* +ve: OK but no match */
+ }
+
+ LASSERT (md->md_offset == 0);
+
+ rlength = hdr->payload_length;
+ mlength = MIN(rlength, (int)md->md_length);
+
+ if (mlength < rlength &&
+ (md->md_options & LNET_MD_TRUNCATE) == 0) {
+ CDEBUG(D_NETERROR, "%s: Dropping REPLY from %s length %d "
+ "for MD "LPX64" would overflow (%d)\n",
+ libcfs_nid2str(ni->ni_nid), libcfs_id2str(src),
+ rlength, hdr->msg.reply.dst_wmd.wh_object_cookie,
+ mlength);
+ LNET_UNLOCK();
+ return ENOENT; /* +ve: OK but no match */
+ }
+
+ CDEBUG(D_NET, "%s: Reply from %s of length %d/%d into md "LPX64"\n",
+ libcfs_nid2str(ni->ni_nid), libcfs_id2str(src),
+ mlength, rlength, hdr->msg.reply.dst_wmd.wh_object_cookie);
+
+ lnet_commit_md(md, msg);
+
+ if (mlength != 0)
+ lnet_setpayloadbuffer(msg);
+
+ msg->msg_ev.type = LNET_EVENT_REPLY;
+ msg->msg_ev.target.pid = hdr->dest_pid;
+ msg->msg_ev.target.nid = hdr->dest_nid;
+ msg->msg_ev.initiator = src;
+ msg->msg_ev.rlength = rlength;
+ msg->msg_ev.mlength = mlength;
+ msg->msg_ev.offset = 0;
+
+ lnet_md_deconstruct(md, &msg->msg_ev.md);
+ lnet_md2handle(&msg->msg_ev.md_handle, md);
+
+ the_lnet.ln_counters.recv_count++;
+ the_lnet.ln_counters.recv_length += mlength;
+
+ LNET_UNLOCK();
+
+ lnet_ni_recv(ni, private, msg, 0, 0, mlength, rlength);
+ return 0;
+}
+
+static int
+lnet_parse_ack(lnet_ni_t *ni, lnet_msg_t *msg)
+{
+ lnet_hdr_t *hdr = &msg->msg_hdr;
+ lnet_process_id_t src = {0};
+ lnet_libmd_t *md;
+
+ src.nid = hdr->src_nid;
+ src.pid = hdr->src_pid;
+
+ /* Convert ack fields to host byte order */
+ hdr->msg.ack.match_bits = le64_to_cpu(hdr->msg.ack.match_bits);
+ hdr->msg.ack.mlength = le32_to_cpu(hdr->msg.ack.mlength);
+
+ LNET_LOCK();
+
+ /* NB handles only looked up by creator (no flips) */
+ md = lnet_wire_handle2md(&hdr->msg.ack.dst_wmd);
+ if (md == NULL || md->md_threshold == 0 || md->md_me != NULL) {
+ /* Don't moan; this is expected */
+ CDEBUG(D_NET,
+ "%s: Dropping ACK from %s to %s MD "LPX64"."LPX64"\n",
+ libcfs_nid2str(ni->ni_nid), libcfs_id2str(src),
+ (md == NULL) ? "invalid" : "inactive",
+ hdr->msg.ack.dst_wmd.wh_interface_cookie,
+ hdr->msg.ack.dst_wmd.wh_object_cookie);
+ if (md != NULL && md->md_me != NULL)
+ CERROR("Source MD also attached to portal %d\n",
+ md->md_me->me_portal);
+
+ LNET_UNLOCK();
+ return ENOENT; /* +ve! */
+ }
+
+ CDEBUG(D_NET, "%s: ACK from %s into md "LPX64"\n",
+ libcfs_nid2str(ni->ni_nid), libcfs_id2str(src),
+ hdr->msg.ack.dst_wmd.wh_object_cookie);
+
+ lnet_commit_md(md, msg);
+
+ msg->msg_ev.type = LNET_EVENT_ACK;
+ msg->msg_ev.target.pid = hdr->dest_pid;
+ msg->msg_ev.target.nid = hdr->dest_nid;
+ msg->msg_ev.initiator = src;
+ msg->msg_ev.mlength = hdr->msg.ack.mlength;
+ msg->msg_ev.match_bits = hdr->msg.ack.match_bits;
+
+ lnet_md_deconstruct(md, &msg->msg_ev.md);
+ lnet_md2handle(&msg->msg_ev.md_handle, md);
+
+ the_lnet.ln_counters.recv_count++;
+
+ LNET_UNLOCK();
+
+ lnet_ni_recv(ni, msg->msg_private, msg, 0, 0, 0, msg->msg_len);
+ return 0;
+}
+
+char *
+lnet_msgtyp2str (int type)
+{
+ switch (type) {
+ case LNET_MSG_ACK:
+ return ("ACK");
+ case LNET_MSG_PUT:
+ return ("PUT");
+ case LNET_MSG_GET:
+ return ("GET");
+ case LNET_MSG_REPLY:
+ return ("REPLY");
+ case LNET_MSG_HELLO:
+ return ("HELLO");
+ default:
+ return ("<UNKNOWN>");
+ }
+}
+
+void
+lnet_print_hdr(lnet_hdr_t * hdr)
+{
+ lnet_process_id_t src = {0};
+ lnet_process_id_t dst = {0};
+ char *type_str = lnet_msgtyp2str (hdr->type);
+
+ src.nid = hdr->src_nid;
+ src.pid = hdr->src_pid;
+
+ dst.nid = hdr->dest_nid;
+ dst.pid = hdr->dest_pid;
+
+ CWARN("P3 Header at %p of type %s\n", hdr, type_str);
+ CWARN(" From %s\n", libcfs_id2str(src));
+ CWARN(" To %s\n", libcfs_id2str(dst));
+
+ switch (hdr->type) {
+ default:
+ break;
+
+ case LNET_MSG_PUT:
CWARN(" Ptl index %d, ack md "LPX64"."LPX64", "
- "match bits "LPX64"\n",
+ "match bits "LPU64"\n",
hdr->msg.put.ptl_index,
hdr->msg.put.ack_wmd.wh_interface_cookie,
hdr->msg.put.ack_wmd.wh_object_cookie,
hdr->msg.put.hdr_data);
break;
- case PTL_MSG_GET:
+ case LNET_MSG_GET:
CWARN(" Ptl index %d, return md "LPX64"."LPX64", "
- "match bits "LPX64"\n", hdr->msg.get.ptl_index,
+ "match bits "LPU64"\n", hdr->msg.get.ptl_index,
hdr->msg.get.return_wmd.wh_interface_cookie,
hdr->msg.get.return_wmd.wh_object_cookie,
hdr->msg.get.match_bits);
hdr->msg.get.src_offset);
break;
- case PTL_MSG_ACK:
+ case LNET_MSG_ACK:
CWARN(" dst md "LPX64"."LPX64", "
"manipulated length %d\n",
hdr->msg.ack.dst_wmd.wh_interface_cookie,
hdr->msg.ack.mlength);
break;
- case PTL_MSG_REPLY:
+ case LNET_MSG_REPLY:
CWARN(" dst md "LPX64"."LPX64", "
"length %d\n",
hdr->msg.reply.dst_wmd.wh_interface_cookie,
hdr->payload_length);
}
-} /* end of print_hdr() */
-
+}
-ptl_err_t
-lib_parse(lib_nal_t *nal, ptl_hdr_t *hdr, void *private)
+int
+lnet_parse(lnet_ni_t *ni, lnet_hdr_t *hdr, lnet_nid_t from_nid,
+ void *private, int rdma_req)
{
- unsigned long flags;
- ptl_err_t rc;
- lib_msg_t *msg;
-
- /* NB we return PTL_OK if we manage to parse the header and believe
- * it looks OK. Anything that goes wrong with receiving the
- * message after that point is the responsibility of the NAL */
-
- /* convert common fields to host byte order */
- hdr->type = NTOH__u32 (hdr->type);
- hdr->src_nid = NTOH__u64 (hdr->src_nid);
- hdr->src_pid = NTOH__u32 (hdr->src_pid);
- hdr->dest_pid = NTOH__u32 (hdr->dest_pid);
- hdr->payload_length = NTOH__u32(hdr->payload_length);
-
- switch (hdr->type) {
- case PTL_MSG_HELLO: {
- /* dest_nid is really ptl_magicversion_t */
- ptl_magicversion_t *mv = (ptl_magicversion_t *)&hdr->dest_nid;
-
- mv->magic = NTOH__u32(mv->magic);
- mv->version_major = NTOH__u16(mv->version_major);
- mv->version_minor = NTOH__u16(mv->version_minor);
-
- if (mv->magic == PORTALS_PROTO_MAGIC &&
- mv->version_major == PORTALS_PROTO_VERSION_MAJOR &&
- mv->version_minor == PORTALS_PROTO_VERSION_MINOR) {
- CWARN (LPU64": Dropping unexpected HELLO message: "
- "magic %d, version %d.%d from "LPD64"\n",
- nal->libnal_ni.ni_pid.nid, mv->magic,
- mv->version_major, mv->version_minor,
- hdr->src_nid);
-
- /* it's good but we don't want it */
- lib_drop_message(nal, private, hdr);
- return PTL_OK;
+ int rc = 0;
+ int for_me;
+ lnet_msg_t *msg;
+ lnet_pid_t dest_pid;
+ lnet_nid_t dest_nid;
+ lnet_nid_t src_nid;
+ __u32 payload_length;
+ __u32 type;
+
+ LASSERT (!cfs_in_interrupt ());
+
+ type = le32_to_cpu(hdr->type);
+ src_nid = le64_to_cpu(hdr->src_nid);
+ dest_nid = le64_to_cpu(hdr->dest_nid);
+ dest_pid = le32_to_cpu(hdr->dest_pid);
+ payload_length = le32_to_cpu(hdr->payload_length);
+
+ for_me = (ni->ni_nid == dest_nid);
+
+ switch (type) {
+ case LNET_MSG_ACK:
+ case LNET_MSG_GET:
+ if (payload_length > 0) {
+ CERROR("%s, src %s: bad %s payload %d (0 expected)\n",
+ libcfs_nid2str(from_nid),
+ libcfs_nid2str(src_nid),
+ lnet_msgtyp2str(type), payload_length);
+ return -EPROTO;
}
+ break;
- /* we got garbage */
- CERROR (LPU64": Bad HELLO message: "
- "magic %d, version %d.%d from "LPD64"\n",
- nal->libnal_ni.ni_pid.nid, mv->magic,
- mv->version_major, mv->version_minor,
- hdr->src_nid);
- return PTL_FAIL;
- }
-
- case PTL_MSG_ACK:
- case PTL_MSG_PUT:
- case PTL_MSG_GET:
- case PTL_MSG_REPLY:
- hdr->dest_nid = NTOH__u64 (hdr->dest_nid);
- if (hdr->dest_nid != nal->libnal_ni.ni_pid.nid) {
- CERROR(LPU64": BAD dest NID in %s message from"
- LPU64" to "LPU64" (not me)\n",
- nal->libnal_ni.ni_pid.nid, hdr_type_string (hdr),
- hdr->src_nid, hdr->dest_nid);
- return PTL_FAIL;
+ case LNET_MSG_PUT:
+ case LNET_MSG_REPLY:
+ if (payload_length > (__u32)(for_me ? LNET_MAX_PAYLOAD : LNET_MTU)) {
+ CERROR("%s, src %s: bad %s payload %d "
+ "(%d max expected)\n",
+ libcfs_nid2str(from_nid),
+ libcfs_nid2str(src_nid),
+ lnet_msgtyp2str(type),
+ payload_length,
+ for_me ? LNET_MAX_PAYLOAD : LNET_MTU);
+ return -EPROTO;
}
break;
default:
- CERROR(LPU64": Bad message type 0x%x from "LPU64"\n",
- nal->libnal_ni.ni_pid.nid, hdr->type, hdr->src_nid);
- return PTL_FAIL;
+ CERROR("%s, src %s: Bad message type 0x%x\n",
+ libcfs_nid2str(from_nid),
+ libcfs_nid2str(src_nid), type);
+ return -EPROTO;
+ }
+
+ if (the_lnet.ln_routing) {
+ cfs_time_t now = cfs_time_current();
+
+ LNET_LOCK();
+
+ ni->ni_last_alive = now;
+ if (ni->ni_status != NULL &&
+ ni->ni_status->ns_status == LNET_NI_STATUS_DOWN)
+ ni->ni_status->ns_status = LNET_NI_STATUS_UP;
+
+ LNET_UNLOCK();
+ }
+
+ /* Regard a bad destination NID as a protocol error. Senders should
+ * know what they're doing; if they don't they're misconfigured, buggy
+ * or malicious so we chop them off at the knees :) */
+
+ if (!for_me) {
+ if (LNET_NIDNET(dest_nid) == LNET_NIDNET(ni->ni_nid)) {
+ /* should have gone direct */
+ CERROR ("%s, src %s: Bad dest nid %s "
+ "(should have been sent direct)\n",
+ libcfs_nid2str(from_nid),
+ libcfs_nid2str(src_nid),
+ libcfs_nid2str(dest_nid));
+ return -EPROTO;
+ }
+
+ if (lnet_islocalnid(dest_nid)) {
+ /* dest is another local NI; sender should have used
+ * this node's NID on its own network */
+ CERROR ("%s, src %s: Bad dest nid %s "
+ "(it's my nid but on a different network)\n",
+ libcfs_nid2str(from_nid),
+ libcfs_nid2str(src_nid),
+ libcfs_nid2str(dest_nid));
+ return -EPROTO;
+ }
+
+ if (rdma_req && type == LNET_MSG_GET) {
+ CERROR ("%s, src %s: Bad optimized GET for %s "
+ "(final destination must be me)\n",
+ libcfs_nid2str(from_nid),
+ libcfs_nid2str(src_nid),
+ libcfs_nid2str(dest_nid));
+ return -EPROTO;
+ }
+
+ if (!the_lnet.ln_routing) {
+ CERROR ("%s, src %s: Dropping message for %s "
+ "(routing not enabled)\n",
+ libcfs_nid2str(from_nid),
+ libcfs_nid2str(src_nid),
+ libcfs_nid2str(dest_nid));
+ goto drop;
+ }
}
- /* We've decided we're not receiving garbage since we can parse the
- * header. We will return PTL_OK come what may... */
+ /* Message looks OK; we're not going to return an error, so we MUST
+ * call back lnd_recv() come what may... */
- if (!list_empty (&nal->libnal_ni.ni_test_peers) && /* normally we don't */
- fail_peer (nal, hdr->src_nid, 0)) /* shall we now? */
+ if (!cfs_list_empty (&the_lnet.ln_test_peers) && /* normally we don't */
+ fail_peer (src_nid, 0)) /* shall we now? */
{
- CERROR(LPU64": Dropping incoming %s from "LPU64
- ": simulated failure\n",
- nal->libnal_ni.ni_pid.nid, hdr_type_string (hdr),
- hdr->src_nid);
- lib_drop_message(nal, private, hdr);
- return PTL_OK;
+ CERROR("%s, src %s: Dropping %s to simulate failure\n",
+ libcfs_nid2str(from_nid), libcfs_nid2str(src_nid),
+ lnet_msgtyp2str(type));
+ goto drop;
}
- msg = lib_msg_alloc(nal);
+ msg = lnet_msg_alloc();
if (msg == NULL) {
- CERROR(LPU64": Dropping incoming %s from "LPU64
- ": can't allocate a lib_msg_t\n",
- nal->libnal_ni.ni_pid.nid, hdr_type_string (hdr),
- hdr->src_nid);
- lib_drop_message(nal, private, hdr);
- return PTL_OK;
+ CERROR("%s, src %s: Dropping %s (out of memory)\n",
+ libcfs_nid2str(from_nid), libcfs_nid2str(src_nid),
+ lnet_msgtyp2str(type));
+ goto drop;
}
- switch (hdr->type) {
- case PTL_MSG_ACK:
- rc = parse_ack(nal, hdr, private, msg);
+ /* msg zeroed in lnet_msg_alloc; i.e. flags all clear, pointers NULL etc */
+
+ msg->msg_type = type;
+ msg->msg_private = private;
+ msg->msg_receiving = 1;
+ msg->msg_len = msg->msg_wanted = payload_length;
+ msg->msg_offset = 0;
+ msg->msg_hdr = *hdr;
+
+ LNET_LOCK();
+ rc = lnet_nid2peer_locked(&msg->msg_rxpeer, from_nid);
+ if (rc != 0) {
+ LNET_UNLOCK();
+ CERROR("%s, src %s: Dropping %s "
+ "(error %d looking up sender)\n",
+ libcfs_nid2str(from_nid), libcfs_nid2str(src_nid),
+ lnet_msgtyp2str(type), rc);
+ goto free_drop;
+ }
+ LNET_UNLOCK();
+
+#ifndef __KERNEL__
+ LASSERT (for_me);
+#else
+ if (!for_me) {
+ msg->msg_target.pid = dest_pid;
+ msg->msg_target.nid = dest_nid;
+ msg->msg_routing = 1;
+ msg->msg_offset = 0;
+
+ LNET_LOCK();
+ if (msg->msg_rxpeer->lp_rtrcredits <= 0 ||
+ lnet_msg2bufpool(msg)->rbp_credits <= 0) {
+ rc = lnet_eager_recv_locked(msg);
+ if (rc != 0) {
+ LNET_UNLOCK();
+ goto free_drop;
+ }
+ }
+ lnet_commit_routedmsg(msg);
+ rc = lnet_post_routed_recv_locked(msg, 0);
+ LNET_UNLOCK();
+
+ if (rc == 0)
+ lnet_ni_recv(ni, msg->msg_private, msg, 0,
+ 0, payload_length, payload_length);
+ return 0;
+ }
+#endif
+ /* convert common msg->hdr fields to host byteorder */
+ msg->msg_hdr.type = type;
+ msg->msg_hdr.src_nid = src_nid;
+ msg->msg_hdr.src_pid = le32_to_cpu(msg->msg_hdr.src_pid);
+ msg->msg_hdr.dest_nid = dest_nid;
+ msg->msg_hdr.dest_pid = dest_pid;
+ msg->msg_hdr.payload_length = payload_length;
+
+ msg->msg_ev.sender = from_nid;
+
+ switch (type) {
+ case LNET_MSG_ACK:
+ rc = lnet_parse_ack(ni, msg);
break;
- case PTL_MSG_PUT:
- rc = parse_put(nal, hdr, private, msg);
+ case LNET_MSG_PUT:
+ rc = lnet_parse_put(ni, msg);
break;
- case PTL_MSG_GET:
- rc = parse_get(nal, hdr, private, msg);
+ case LNET_MSG_GET:
+ rc = lnet_parse_get(ni, msg, rdma_req);
break;
- case PTL_MSG_REPLY:
- rc = parse_reply(nal, hdr, private, msg);
+ case LNET_MSG_REPLY:
+ rc = lnet_parse_reply(ni, msg);
break;
default:
LASSERT(0);
- rc = PTL_FAIL; /* no compiler warning please */
- break;
+ goto free_drop; /* prevent an unused label if !kernel */
}
-
- if (rc != PTL_OK) {
- if (msg->md != NULL) {
- /* committed... */
- lib_finalize(nal, private, msg, rc);
- } else {
- LIB_LOCK(nal, flags);
- lib_msg_free(nal, msg); /* expects LIB_LOCK held */
- LIB_UNLOCK(nal, flags);
- lib_drop_message(nal, private, hdr);
- }
+ if (rc == 0)
+ return 0;
+
+ LASSERT (rc == ENOENT);
+
+ free_drop:
+ LASSERT (msg->msg_md == NULL);
+ LNET_LOCK();
+ if (msg->msg_rxpeer != NULL) {
+ lnet_peer_decref_locked(msg->msg_rxpeer);
+ msg->msg_rxpeer = NULL;
}
+ lnet_msg_free(msg); /* expects LNET_LOCK held */
+ LNET_UNLOCK();
- return PTL_OK;
- /* That's "OK I can parse it", not "OK I like it" :) */
+ drop:
+ lnet_drop_message(ni, private, payload_length);
+ return 0;
}
-int
-lib_api_put(nal_t *apinal, ptl_handle_md_t *mdh,
- ptl_ack_req_t ack, ptl_process_id_t *id,
- ptl_pt_index_t portal, ptl_ac_index_t ac,
- ptl_match_bits_t match_bits,
- ptl_size_t offset, ptl_hdr_data_t hdr_data)
+/**
+ * Initiate an asynchronous PUT operation.
+ *
+ * There are several events associated with a PUT: completion of the send on
+ * the initiator node (LNET_EVENT_SEND), and when the send completes
+ * successfully, the receipt of an acknowledgment (LNET_EVENT_ACK) indicating
+ * that the operation was accepted by the target. The event LNET_EVENT_PUT is
+ * used at the target node to indicate the completion of incoming data
+ * delivery.
+ *
+ * The local events will be logged in the EQ associated with the MD pointed to
+ * by \a mdh handle. Using a MD without an associated EQ results in these
+ * events being discarded. In this case, the caller must have another
+ * mechanism (e.g., a higher level protocol) for determining when it is safe
+ * to modify the memory region associated with the MD.
+ *
+ * Note that LNet does not guarantee the order of LNET_EVENT_SEND and
+ * LNET_EVENT_ACK, though intuitively ACK should happen after SEND.
+ *
+ * \param self Indicates the NID of a local interface through which to send
+ * the PUT request. Use LNET_NID_ANY to let LNet choose one by itself.
+ * \param mdh A handle for the MD that describes the memory to be sent. The MD
+ * must be "free floating" (See LNetMDBind()).
+ * \param ack Controls whether an acknowledgment is requested.
+ * Acknowledgments are only sent when they are requested by the initiating
+ * process and the target MD enables them.
+ * \param target A process identifier for the target process.
+ * \param portal The index in the \a target's portal table.
+ * \param match_bits The match bits to use for MD selection at the target
+ * process.
+ * \param offset The offset into the target MD (only used when the target
+ * MD has the LNET_MD_MANAGE_REMOTE option set).
+ * \param hdr_data 64 bits of user data that can be included in the message
+ * header. This data is written to an event queue entry at the target if an
+ * EQ is present on the matching MD.
+ *
+ * \retval 0 Success, and only in this case events will be generated
+ * and logged to EQ (if it exists).
+ * \retval -EIO Simulated failure.
+ * \retval -ENOMEM Memory allocation failure.
+ * \retval -ENOENT Invalid MD object.
+ *
+ * \see lnet_event_t::hdr_data and lnet_event_kind_t.
+ */
+int
+LNetPut(lnet_nid_t self, lnet_handle_md_t mdh, lnet_ack_req_t ack,
+ lnet_process_id_t target, unsigned int portal,
+ __u64 match_bits, unsigned int offset,
+ __u64 hdr_data)
{
- lib_nal_t *nal = apinal->nal_data;
- lib_ni_t *ni = &nal->libnal_ni;
- lib_msg_t *msg;
- ptl_hdr_t hdr;
- lib_md_t *md;
- unsigned long flags;
+ lnet_msg_t *msg;
+ lnet_libmd_t *md;
int rc;
-
- if (!list_empty (&ni->ni_test_peers) && /* normally we don't */
- fail_peer (nal, id->nid, 1)) /* shall we now? */
+
+ LASSERT (the_lnet.ln_init);
+ LASSERT (the_lnet.ln_refcount > 0);
+
+ if (!cfs_list_empty (&the_lnet.ln_test_peers) && /* normally we don't */
+ fail_peer (target.nid, 1)) /* shall we now? */
{
- CERROR("Dropping PUT to "LPU64": simulated failure\n",
- id->nid);
- return PTL_PROCESS_INVALID;
+ CERROR("Dropping PUT to %s: simulated failure\n",
+ libcfs_id2str(target));
+ return -EIO;
}
- msg = lib_msg_alloc(nal);
+ msg = lnet_msg_alloc();
if (msg == NULL) {
- CERROR(LPU64": Dropping PUT to "LPU64": ENOMEM on lib_msg_t\n",
- ni->ni_pid.nid, id->nid);
- return PTL_NO_SPACE;
+ CERROR("Dropping PUT to %s: ENOMEM on lnet_msg_t\n",
+ libcfs_id2str(target));
+ return -ENOMEM;
}
+ msg->msg_vmflush = !!cfs_memory_pressure_get();
+
+ LNET_LOCK();
- LIB_LOCK(nal, flags);
+ md = lnet_handle2md(&mdh);
+ if (md == NULL || md->md_threshold == 0 || md->md_me != NULL) {
+ lnet_msg_free(msg);
- md = ptl_handle2md(mdh, nal);
- if (md == NULL || md->threshold == 0) {
- lib_msg_free(nal, msg);
- LIB_UNLOCK(nal, flags);
-
- return PTL_MD_INVALID;
+ CERROR("Dropping PUT ("LPU64":%d:%s): MD (%d) invalid\n",
+ match_bits, portal, libcfs_id2str(target),
+ md == NULL ? -1 : md->md_threshold);
+ if (md != NULL && md->md_me != NULL)
+ CERROR("Source MD also attached to portal %d\n",
+ md->md_me->me_portal);
+
+ LNET_UNLOCK();
+ return -ENOENT;
}
- CDEBUG(D_NET, "PtlPut -> "LPX64"\n", id->nid);
+ CDEBUG(D_NET, "LNetPut -> %s\n", libcfs_id2str(target));
+
+ lnet_commit_md(md, msg);
+
+ lnet_prep_send(msg, LNET_MSG_PUT, target, 0, md->md_length);
- memset (&hdr, 0, sizeof (hdr));
- hdr.type = HTON__u32 (PTL_MSG_PUT);
- hdr.dest_nid = HTON__u64 (id->nid);
- hdr.dest_pid = HTON__u32 (id->pid);
- hdr.src_nid = HTON__u64 (ni->ni_pid.nid);
- hdr.src_pid = HTON__u32 (ni->ni_pid.pid);
- hdr.payload_length = HTON__u32 (md->length);
+ msg->msg_hdr.msg.put.match_bits = cpu_to_le64(match_bits);
+ msg->msg_hdr.msg.put.ptl_index = cpu_to_le32(portal);
+ msg->msg_hdr.msg.put.offset = cpu_to_le32(offset);
+ msg->msg_hdr.msg.put.hdr_data = hdr_data;
/* NB handles only looked up by creator (no flips) */
- if (ack == PTL_ACK_REQ) {
- hdr.msg.put.ack_wmd.wh_interface_cookie = ni->ni_interface_cookie;
- hdr.msg.put.ack_wmd.wh_object_cookie = md->md_lh.lh_cookie;
+ if (ack == LNET_ACK_REQ) {
+ msg->msg_hdr.msg.put.ack_wmd.wh_interface_cookie =
+ the_lnet.ln_interface_cookie;
+ msg->msg_hdr.msg.put.ack_wmd.wh_object_cookie =
+ md->md_lh.lh_cookie;
} else {
- hdr.msg.put.ack_wmd = PTL_WIRE_HANDLE_NONE;
- }
-
- hdr.msg.put.match_bits = HTON__u64 (match_bits);
- hdr.msg.put.ptl_index = HTON__u32 (portal);
- hdr.msg.put.offset = HTON__u32 (offset);
- hdr.msg.put.hdr_data = hdr_data;
-
- lib_commit_md(nal, md, msg);
-
- msg->ev.type = PTL_EVENT_SEND_END;
- msg->ev.initiator.nid = ni->ni_pid.nid;
- msg->ev.initiator.pid = ni->ni_pid.pid;
- msg->ev.portal = portal;
- msg->ev.match_bits = match_bits;
- msg->ev.rlength = md->length;
- msg->ev.mlength = md->length;
- msg->ev.offset = offset;
- msg->ev.hdr_data = hdr_data;
-
- lib_md_deconstruct(nal, md, &msg->ev.mem_desc);
-
- ni->ni_counters.send_count++;
- ni->ni_counters.send_length += md->length;
-
- LIB_UNLOCK(nal, flags);
-
- rc = lib_send (nal, NULL, msg, &hdr, PTL_MSG_PUT,
- id->nid, id->pid, md, 0, md->length);
- if (rc != PTL_OK) {
- CERROR("Error sending PUT to "LPX64": %d\n",
- id->nid, rc);
- lib_finalize (nal, NULL, msg, rc);
- }
-
+ msg->msg_hdr.msg.put.ack_wmd.wh_interface_cookie =
+ LNET_WIRE_HANDLE_COOKIE_NONE;
+ msg->msg_hdr.msg.put.ack_wmd.wh_object_cookie =
+ LNET_WIRE_HANDLE_COOKIE_NONE;
+ }
+
+ msg->msg_ev.type = LNET_EVENT_SEND;
+ msg->msg_ev.initiator.nid = LNET_NID_ANY;
+ msg->msg_ev.initiator.pid = the_lnet.ln_pid;
+ msg->msg_ev.target = target;
+ msg->msg_ev.sender = LNET_NID_ANY;
+ msg->msg_ev.pt_index = portal;
+ msg->msg_ev.match_bits = match_bits;
+ msg->msg_ev.rlength = md->md_length;
+ msg->msg_ev.mlength = md->md_length;
+ msg->msg_ev.offset = offset;
+ msg->msg_ev.hdr_data = hdr_data;
+
+ lnet_md_deconstruct(md, &msg->msg_ev.md);
+ lnet_md2handle(&msg->msg_ev.md_handle, md);
+
+ the_lnet.ln_counters.send_count++;
+ the_lnet.ln_counters.send_length += md->md_length;
+
+ LNET_UNLOCK();
+
+ rc = lnet_send(self, msg);
+ if (rc != 0) {
+ CERROR("Error sending PUT to %s: %d\n",
+ libcfs_id2str(target), rc);
+ lnet_finalize (NULL, msg, rc);
+ }
+
/* completion will be signalled by an event */
- return PTL_OK;
+ return 0;
}
-lib_msg_t *
-lib_create_reply_msg (lib_nal_t *nal, ptl_nid_t peer_nid, lib_msg_t *getmsg)
+lnet_msg_t *
+lnet_create_reply_msg (lnet_ni_t *ni, lnet_msg_t *getmsg)
{
- /* The NAL can DMA direct to the GET md (i.e. no REPLY msg). This
- * returns a msg for the NAL to pass to lib_finalize() when the sink
+ /* The LND can DMA direct to the GET md (i.e. no REPLY msg). This
+ * returns a msg for the LND to pass to lnet_finalize() when the sink
* data has been received.
*
* CAVEAT EMPTOR: 'getmsg' is the original GET, which is freed when
- * lib_finalize() is called on it, so the NAL must call this first */
+ * lnet_finalize() is called on it, so the LND must call this first */
+
+ lnet_msg_t *msg = lnet_msg_alloc();
+ lnet_libmd_t *getmd = getmsg->msg_md;
+ lnet_process_id_t peer_id = getmsg->msg_target;
- lib_ni_t *ni = &nal->libnal_ni;
- lib_msg_t *msg = lib_msg_alloc(nal);
- lib_md_t *getmd = getmsg->md;
- unsigned long flags;
+ LASSERT (!getmsg->msg_target_is_router);
+ LASSERT (!getmsg->msg_routing);
- LIB_LOCK(nal, flags);
+ LNET_LOCK();
- LASSERT (getmd->pending > 0);
+ LASSERT (getmd->md_refcount > 0);
if (msg == NULL) {
- CERROR ("Dropping REPLY from "LPU64": can't allocate msg\n",
- peer_nid);
+ CERROR ("%s: Dropping REPLY from %s: can't allocate msg\n",
+ libcfs_nid2str(ni->ni_nid), libcfs_id2str(peer_id));
goto drop;
}
- if (getmd->threshold == 0) {
- CERROR ("Dropping REPLY from "LPU64" for inactive MD %p\n",
- peer_nid, getmd);
+ if (getmd->md_threshold == 0) {
+ CERROR ("%s: Dropping REPLY from %s for inactive MD %p\n",
+ libcfs_nid2str(ni->ni_nid), libcfs_id2str(peer_id),
+ getmd);
goto drop_msg;
}
- LASSERT (getmd->offset == 0);
+ LASSERT (getmd->md_offset == 0);
+
+ CDEBUG(D_NET, "%s: Reply from %s md %p\n",
+ libcfs_nid2str(ni->ni_nid), libcfs_id2str(peer_id), getmd);
- CDEBUG(D_NET, "Reply from "LPU64" md %p\n", peer_nid, getmd);
+ lnet_commit_md (getmd, msg);
- lib_commit_md (nal, getmd, msg);
+ msg->msg_type = LNET_MSG_GET; /* flag this msg as an "optimized" GET */
- msg->ev.type = PTL_EVENT_REPLY_END;
- msg->ev.initiator.nid = peer_nid;
- msg->ev.initiator.pid = 0; /* XXX FIXME!!! */
- msg->ev.rlength = msg->ev.mlength = getmd->length;
- msg->ev.offset = 0;
+ msg->msg_ev.type = LNET_EVENT_REPLY;
+ msg->msg_ev.initiator = peer_id;
+ msg->msg_ev.sender = peer_id.nid; /* optimized GETs can't be routed */
+ msg->msg_ev.rlength = msg->msg_ev.mlength = getmd->md_length;
+ msg->msg_ev.offset = 0;
- lib_md_deconstruct(nal, getmd, &msg->ev.mem_desc);
+ lnet_md_deconstruct(getmd, &msg->msg_ev.md);
+ lnet_md2handle(&msg->msg_ev.md_handle, getmd);
- ni->ni_counters.recv_count++;
- ni->ni_counters.recv_length += getmd->length;
+ the_lnet.ln_counters.recv_count++;
+ the_lnet.ln_counters.recv_length += getmd->md_length;
- LIB_UNLOCK(nal, flags);
+ LNET_UNLOCK();
return msg;
drop_msg:
- lib_msg_free(nal, msg);
+ lnet_msg_free(msg);
drop:
- nal->libnal_ni.ni_counters.drop_count++;
- nal->libnal_ni.ni_counters.drop_length += getmd->length;
+ the_lnet.ln_counters.drop_count++;
+ the_lnet.ln_counters.drop_length += getmd->md_length;
- LIB_UNLOCK (nal, flags);
+ LNET_UNLOCK ();
return NULL;
}
-int
-lib_api_get(nal_t *apinal, ptl_handle_md_t *mdh, ptl_process_id_t *id,
- ptl_pt_index_t portal, ptl_ac_index_t ac,
- ptl_match_bits_t match_bits, ptl_size_t offset)
+void
+lnet_set_reply_msg_len(lnet_ni_t *ni, lnet_msg_t *reply, unsigned int len)
+{
+ /* Set the REPLY length, now the RDMA that elides the REPLY message has
+ * completed and I know it. */
+ LASSERT (reply != NULL);
+ LASSERT (reply->msg_type == LNET_MSG_GET);
+ LASSERT (reply->msg_ev.type == LNET_EVENT_REPLY);
+
+ /* NB I trusted my peer to RDMA. If she tells me she's written beyond
+ * the end of my buffer, I might as well be dead. */
+ LASSERT (len <= reply->msg_ev.mlength);
+
+ reply->msg_ev.mlength = len;
+}
+
+/**
+ * Initiate an asynchronous GET operation.
+ *
+ * On the initiator node, an LNET_EVENT_SEND is logged when the GET request
+ * is sent, and an LNET_EVENT_REPLY is logged when the data returned from
+ * the target node in the REPLY has been written to local MD.
+ *
+ * On the target node, an LNET_EVENT_GET is logged when the GET request
+ * arrives and is accepted into a MD.
+ *
+ * \param self,target,portal,match_bits,offset See the discussion in LNetPut().
+ * \param mdh A handle for the MD that describes the memory into which the
+ * requested data will be received. The MD must be "free floating" (See LNetMDBind()).
+ *
+ * \retval 0 Success, and only in this case events will be generated
+ * and logged to EQ (if it exists) of the MD.
+ * \retval -EIO Simulated failure.
+ * \retval -ENOMEM Memory allocation failure.
+ * \retval -ENOENT Invalid MD object.
+ */
+int
+LNetGet(lnet_nid_t self, lnet_handle_md_t mdh,
+ lnet_process_id_t target, unsigned int portal,
+ __u64 match_bits, unsigned int offset)
{
- lib_nal_t *nal = apinal->nal_data;
- lib_ni_t *ni = &nal->libnal_ni;
- lib_msg_t *msg;
- ptl_hdr_t hdr;
- lib_md_t *md;
- unsigned long flags;
+ lnet_msg_t *msg;
+ lnet_libmd_t *md;
int rc;
-
- if (!list_empty (&ni->ni_test_peers) && /* normally we don't */
- fail_peer (nal, id->nid, 1)) /* shall we now? */
+
+ LASSERT (the_lnet.ln_init);
+ LASSERT (the_lnet.ln_refcount > 0);
+
+ if (!cfs_list_empty (&the_lnet.ln_test_peers) && /* normally we don't */
+ fail_peer (target.nid, 1)) /* shall we now? */
{
- CERROR("Dropping PUT to "LPX64": simulated failure\n",
- id->nid);
- return PTL_PROCESS_INVALID;
+ CERROR("Dropping GET to %s: simulated failure\n",
+ libcfs_id2str(target));
+ return -EIO;
}
- msg = lib_msg_alloc(nal);
+ msg = lnet_msg_alloc();
if (msg == NULL) {
- CERROR("Dropping GET to "LPU64": ENOMEM on lib_msg_t\n",
- id->nid);
- return PTL_NO_SPACE;
+ CERROR("Dropping GET to %s: ENOMEM on lnet_msg_t\n",
+ libcfs_id2str(target));
+ return -ENOMEM;
}
- LIB_LOCK(nal, flags);
+ LNET_LOCK();
+
+ md = lnet_handle2md(&mdh);
+ if (md == NULL || md->md_threshold == 0 || md->md_me != NULL) {
+ lnet_msg_free(msg);
- md = ptl_handle2md(mdh, nal);
- if (md == NULL || !md->threshold) {
- lib_msg_free(nal, msg);
- LIB_UNLOCK(nal, flags);
+ CERROR("Dropping GET ("LPU64":%d:%s): MD (%d) invalid\n",
+ match_bits, portal, libcfs_id2str(target),
+ md == NULL ? -1 : md->md_threshold);
+ if (md != NULL && md->md_me != NULL)
+ CERROR("REPLY MD also attached to portal %d\n",
+ md->md_me->me_portal);
- return PTL_MD_INVALID;
+ LNET_UNLOCK();
+ return -ENOENT;
}
- CDEBUG(D_NET, "PtlGet -> %Lu: %lu\n", (unsigned long long)id->nid,
- (unsigned long)id->pid);
+ CDEBUG(D_NET, "LNetGet -> %s\n", libcfs_id2str(target));
- memset (&hdr, 0, sizeof (hdr));
- hdr.type = HTON__u32 (PTL_MSG_GET);
- hdr.dest_nid = HTON__u64 (id->nid);
- hdr.dest_pid = HTON__u32 (id->pid);
- hdr.src_nid = HTON__u64 (ni->ni_pid.nid);
- hdr.src_pid = HTON__u32 (ni->ni_pid.pid);
- hdr.payload_length = 0;
+ lnet_commit_md(md, msg);
+
+ lnet_prep_send(msg, LNET_MSG_GET, target, 0, 0);
+
+ msg->msg_hdr.msg.get.match_bits = cpu_to_le64(match_bits);
+ msg->msg_hdr.msg.get.ptl_index = cpu_to_le32(portal);
+ msg->msg_hdr.msg.get.src_offset = cpu_to_le32(offset);
+ msg->msg_hdr.msg.get.sink_length = cpu_to_le32(md->md_length);
/* NB handles only looked up by creator (no flips) */
- hdr.msg.get.return_wmd.wh_interface_cookie = ni->ni_interface_cookie;
- hdr.msg.get.return_wmd.wh_object_cookie = md->md_lh.lh_cookie;
+ msg->msg_hdr.msg.get.return_wmd.wh_interface_cookie =
+ the_lnet.ln_interface_cookie;
+ msg->msg_hdr.msg.get.return_wmd.wh_object_cookie =
+ md->md_lh.lh_cookie;
+
+ msg->msg_ev.type = LNET_EVENT_SEND;
+ msg->msg_ev.initiator.nid = LNET_NID_ANY;
+ msg->msg_ev.initiator.pid = the_lnet.ln_pid;
+ msg->msg_ev.target = target;
+ msg->msg_ev.sender = LNET_NID_ANY;
+ msg->msg_ev.pt_index = portal;
+ msg->msg_ev.match_bits = match_bits;
+ msg->msg_ev.rlength = md->md_length;
+ msg->msg_ev.mlength = md->md_length;
+ msg->msg_ev.offset = offset;
+ msg->msg_ev.hdr_data = 0;
+
+ lnet_md_deconstruct(md, &msg->msg_ev.md);
+ lnet_md2handle(&msg->msg_ev.md_handle, md);
+
+ the_lnet.ln_counters.send_count++;
+
+ LNET_UNLOCK();
+
+ rc = lnet_send(self, msg);
+ if (rc < 0) {
+ CERROR("error sending GET to %s: %d\n",
+ libcfs_id2str(target), rc);
+ lnet_finalize (NULL, msg, rc);
+ }
+
+ /* completion will be signalled by an event */
+ return 0;
+}
- hdr.msg.get.match_bits = HTON__u64 (match_bits);
- hdr.msg.get.ptl_index = HTON__u32 (portal);
- hdr.msg.get.src_offset = HTON__u32 (offset);
- hdr.msg.get.sink_length = HTON__u32 (md->length);
+/**
+ * Calculate distance to node at \a dstnid.
+ *
+ * \param dstnid Target NID.
+ * \param srcnidp If not NULL, NID of the local interface to reach \a dstnid
+ * is saved here.
+ * \param orderp If not NULL, order of the route to reach \a dstnid is saved
+ * here.
+ *
+ * \retval 0 If \a dstnid belongs to a local interface, and reserved option
+ * local_nid_dist_zero is set, which is the default.
+ * \retval positives Distance to target NID, i.e. number of hops plus one.
+ * \retval -EHOSTUNREACH If \a dstnid is not reachable.
+ */
+int
+LNetDist (lnet_nid_t dstnid, lnet_nid_t *srcnidp, __u32 *orderp)
+{
+ cfs_list_t *e;
+ lnet_ni_t *ni;
+ lnet_remotenet_t *rnet;
+ __u32 dstnet = LNET_NIDNET(dstnid);
+ int hops;
+ __u32 order = 2;
+
+ /* if !local_nid_dist_zero, I don't return a distance of 0 ever
+ * (when lustre sees a distance of 0, it substitutes 0@lo), so I
+ * keep order 0 free for 0@lo and order 1 free for a local NID
+ * match */
+
+ LASSERT (the_lnet.ln_init);
+ LASSERT (the_lnet.ln_refcount > 0);
+
+ LNET_LOCK();
+
+ cfs_list_for_each (e, &the_lnet.ln_nis) {
+ ni = cfs_list_entry(e, lnet_ni_t, ni_list);
+
+ if (ni->ni_nid == dstnid) {
+ if (srcnidp != NULL)
+ *srcnidp = dstnid;
+ if (orderp != NULL) {
+ if (LNET_NETTYP(LNET_NIDNET(dstnid)) == LOLND)
+ *orderp = 0;
+ else
+ *orderp = 1;
+ }
+ LNET_UNLOCK();
- lib_commit_md(nal, md, msg);
+ return local_nid_dist_zero ? 0 : 1;
+ }
+
+ if (LNET_NIDNET(ni->ni_nid) == dstnet) {
+ if (srcnidp != NULL)
+ *srcnidp = ni->ni_nid;
+ if (orderp != NULL)
+ *orderp = order;
+ LNET_UNLOCK();
+ return 1;
+ }
- msg->ev.type = PTL_EVENT_SEND_END;
- msg->ev.initiator = ni->ni_pid;
- msg->ev.portal = portal;
- msg->ev.match_bits = match_bits;
- msg->ev.rlength = md->length;
- msg->ev.mlength = md->length;
- msg->ev.offset = offset;
- msg->ev.hdr_data = 0;
+ order++;
+ }
+
+ cfs_list_for_each (e, &the_lnet.ln_remote_nets) {
+ rnet = cfs_list_entry(e, lnet_remotenet_t, lrn_list);
- lib_md_deconstruct(nal, md, &msg->ev.mem_desc);
+ if (rnet->lrn_net == dstnet) {
+ lnet_route_t *route;
+ lnet_route_t *shortest = NULL;
- ni->ni_counters.send_count++;
+ LASSERT (!cfs_list_empty(&rnet->lrn_routes));
- LIB_UNLOCK(nal, flags);
+ cfs_list_for_each_entry(route, &rnet->lrn_routes,
+ lr_list) {
+ if (shortest == NULL ||
+ route->lr_hops < shortest->lr_hops)
+ shortest = route;
+ }
- rc = lib_send (nal, NULL, msg, &hdr, PTL_MSG_GET,
- id->nid, id->pid, NULL, 0, 0);
- if (rc != PTL_OK) {
- CERROR(LPU64": error sending GET to "LPU64": %d\n",
- ni->ni_pid.nid, id->nid, rc);
- lib_finalize (nal, NULL, msg, rc);
+ LASSERT (shortest != NULL);
+ hops = shortest->lr_hops;
+ if (srcnidp != NULL)
+ *srcnidp = shortest->lr_gateway->lp_ni->ni_nid;
+ if (orderp != NULL)
+ *orderp = order;
+ LNET_UNLOCK();
+ return hops + 1;
+ }
+ order++;
}
-
- /* completion will be signalled by an event */
- return PTL_OK;
+
+ LNET_UNLOCK();
+ return -EHOSTUNREACH;
}
-void lib_assert_wire_constants (void)
+/**
+ * Set the number of asynchronous messages expected from a target process.
+ *
+ * This function is only meaningful for userspace callers. It's a no-op when
+ * called from kernel.
+ *
+ * Asynchronous messages are those that can come from a target when the
+ * userspace process is not waiting for IO to complete; e.g., AST callbacks
+ * from Lustre servers. Specifying the expected number of such messages
+ * allows them to be eagerly received when user process is not running in
+ * LNet; otherwise network errors may occur.
+ *
+ * \param id Process ID of the target process.
+ * \param nasync Number of asynchronous messages expected from the target.
+ *
+ * \return 0 on success, and an error code otherwise.
+ */
+int
+LNetSetAsync(lnet_process_id_t id, int nasync)
{
- /* Wire protocol assertions generated by 'wirecheck'
- * running on Linux robert.bartonsoftware.com 2.4.20-18.9 #1 Thu May 29 06:54:41 EDT 2003 i68
- * with gcc version 3.2.2 20030222 (Red Hat Linux 3.2.2-5) */
-
-
- /* Constants... */
- LASSERT (PORTALS_PROTO_MAGIC == 0xeebc0ded);
- LASSERT (PORTALS_PROTO_VERSION_MAJOR == 0);
- LASSERT (PORTALS_PROTO_VERSION_MINOR == 3);
- LASSERT (PTL_MSG_ACK == 0);
- LASSERT (PTL_MSG_PUT == 1);
- LASSERT (PTL_MSG_GET == 2);
- LASSERT (PTL_MSG_REPLY == 3);
- LASSERT (PTL_MSG_HELLO == 4);
-
- /* Checks for struct ptl_handle_wire_t */
- LASSERT ((int)sizeof(ptl_handle_wire_t) == 16);
- LASSERT (offsetof(ptl_handle_wire_t, wh_interface_cookie) == 0);
- LASSERT ((int)sizeof(((ptl_handle_wire_t *)0)->wh_interface_cookie) == 8);
- LASSERT (offsetof(ptl_handle_wire_t, wh_object_cookie) == 8);
- LASSERT ((int)sizeof(((ptl_handle_wire_t *)0)->wh_object_cookie) == 8);
-
- /* Checks for struct ptl_magicversion_t */
- LASSERT ((int)sizeof(ptl_magicversion_t) == 8);
- LASSERT (offsetof(ptl_magicversion_t, magic) == 0);
- LASSERT ((int)sizeof(((ptl_magicversion_t *)0)->magic) == 4);
- LASSERT (offsetof(ptl_magicversion_t, version_major) == 4);
- LASSERT ((int)sizeof(((ptl_magicversion_t *)0)->version_major) == 2);
- LASSERT (offsetof(ptl_magicversion_t, version_minor) == 6);
- LASSERT ((int)sizeof(((ptl_magicversion_t *)0)->version_minor) == 2);
-
- /* Checks for struct ptl_hdr_t */
- LASSERT ((int)sizeof(ptl_hdr_t) == 72);
- LASSERT (offsetof(ptl_hdr_t, dest_nid) == 0);
- LASSERT ((int)sizeof(((ptl_hdr_t *)0)->dest_nid) == 8);
- LASSERT (offsetof(ptl_hdr_t, src_nid) == 8);
- LASSERT ((int)sizeof(((ptl_hdr_t *)0)->src_nid) == 8);
- LASSERT (offsetof(ptl_hdr_t, dest_pid) == 16);
- LASSERT ((int)sizeof(((ptl_hdr_t *)0)->dest_pid) == 4);
- LASSERT (offsetof(ptl_hdr_t, src_pid) == 20);
- LASSERT ((int)sizeof(((ptl_hdr_t *)0)->src_pid) == 4);
- LASSERT (offsetof(ptl_hdr_t, type) == 24);
- LASSERT ((int)sizeof(((ptl_hdr_t *)0)->type) == 4);
- LASSERT (offsetof(ptl_hdr_t, payload_length) == 28);
- LASSERT ((int)sizeof(((ptl_hdr_t *)0)->payload_length) == 4);
- LASSERT (offsetof(ptl_hdr_t, msg) == 32);
- LASSERT ((int)sizeof(((ptl_hdr_t *)0)->msg) == 40);
-
- /* Ack */
- LASSERT (offsetof(ptl_hdr_t, msg.ack.dst_wmd) == 32);
- LASSERT ((int)sizeof(((ptl_hdr_t *)0)->msg.ack.dst_wmd) == 16);
- LASSERT (offsetof(ptl_hdr_t, msg.ack.match_bits) == 48);
- LASSERT ((int)sizeof(((ptl_hdr_t *)0)->msg.ack.match_bits) == 8);
- LASSERT (offsetof(ptl_hdr_t, msg.ack.mlength) == 56);
- LASSERT ((int)sizeof(((ptl_hdr_t *)0)->msg.ack.mlength) == 4);
-
- /* Put */
- LASSERT (offsetof(ptl_hdr_t, msg.put.ack_wmd) == 32);
- LASSERT ((int)sizeof(((ptl_hdr_t *)0)->msg.put.ack_wmd) == 16);
- LASSERT (offsetof(ptl_hdr_t, msg.put.match_bits) == 48);
- LASSERT ((int)sizeof(((ptl_hdr_t *)0)->msg.put.match_bits) == 8);
- LASSERT (offsetof(ptl_hdr_t, msg.put.hdr_data) == 56);
- LASSERT ((int)sizeof(((ptl_hdr_t *)0)->msg.put.hdr_data) == 8);
- LASSERT (offsetof(ptl_hdr_t, msg.put.ptl_index) == 64);
- LASSERT ((int)sizeof(((ptl_hdr_t *)0)->msg.put.ptl_index) == 4);
- LASSERT (offsetof(ptl_hdr_t, msg.put.offset) == 68);
- LASSERT ((int)sizeof(((ptl_hdr_t *)0)->msg.put.offset) == 4);
-
- /* Get */
- LASSERT (offsetof(ptl_hdr_t, msg.get.return_wmd) == 32);
- LASSERT ((int)sizeof(((ptl_hdr_t *)0)->msg.get.return_wmd) == 16);
- LASSERT (offsetof(ptl_hdr_t, msg.get.match_bits) == 48);
- LASSERT ((int)sizeof(((ptl_hdr_t *)0)->msg.get.match_bits) == 8);
- LASSERT (offsetof(ptl_hdr_t, msg.get.ptl_index) == 56);
- LASSERT ((int)sizeof(((ptl_hdr_t *)0)->msg.get.ptl_index) == 4);
- LASSERT (offsetof(ptl_hdr_t, msg.get.src_offset) == 60);
- LASSERT ((int)sizeof(((ptl_hdr_t *)0)->msg.get.src_offset) == 4);
- LASSERT (offsetof(ptl_hdr_t, msg.get.sink_length) == 64);
- LASSERT ((int)sizeof(((ptl_hdr_t *)0)->msg.get.sink_length) == 4);
-
- /* Reply */
- LASSERT (offsetof(ptl_hdr_t, msg.reply.dst_wmd) == 32);
- LASSERT ((int)sizeof(((ptl_hdr_t *)0)->msg.reply.dst_wmd) == 16);
-
- /* Hello */
- LASSERT (offsetof(ptl_hdr_t, msg.hello.incarnation) == 32);
- LASSERT ((int)sizeof(((ptl_hdr_t *)0)->msg.hello.incarnation) == 8);
- LASSERT (offsetof(ptl_hdr_t, msg.hello.type) == 40);
- LASSERT ((int)sizeof(((ptl_hdr_t *)0)->msg.hello.type) == 4);
+#ifdef __KERNEL__
+ return 0;
+#else
+ lnet_ni_t *ni;
+ lnet_remotenet_t *rnet;
+ cfs_list_t *tmp;
+ lnet_route_t *route;
+ lnet_nid_t *nids;
+ int nnids;
+ int maxnids = 256;
+ int rc = 0;
+ int rc2;
+
+ /* Target on a local network? */
+ ni = lnet_net2ni(LNET_NIDNET(id.nid));
+ if (ni != NULL) {
+ if (ni->ni_lnd->lnd_setasync != NULL)
+ rc = (ni->ni_lnd->lnd_setasync)(ni, id, nasync);
+ lnet_ni_decref(ni);
+ return rc;
+ }
+
+ /* Target on a remote network: apply to routers */
+ again:
+ LIBCFS_ALLOC(nids, maxnids * sizeof(*nids));
+ if (nids == NULL)
+ return -ENOMEM;
+ nnids = 0;
+
+ /* Snapshot all the router NIDs */
+ LNET_LOCK();
+ rnet = lnet_find_net_locked(LNET_NIDNET(id.nid));
+ if (rnet != NULL) {
+ cfs_list_for_each(tmp, &rnet->lrn_routes) {
+ if (nnids == maxnids) {
+ LNET_UNLOCK();
+ LIBCFS_FREE(nids, maxnids * sizeof(*nids));
+ maxnids *= 2;
+ goto again;
+ }
+
+ route = cfs_list_entry(tmp, lnet_route_t, lr_list);
+ nids[nnids++] = route->lr_gateway->lp_nid;
+ }
+ }
+ LNET_UNLOCK();
+
+ /* set async on all the routers */
+ while (nnids-- > 0) {
+ id.pid = LUSTRE_SRV_LNET_PID;
+ id.nid = nids[nnids];
+
+ ni = lnet_net2ni(LNET_NIDNET(id.nid));
+ if (ni == NULL)
+ continue;
+
+ if (ni->ni_lnd->lnd_setasync != NULL) {
+ rc2 = (ni->ni_lnd->lnd_setasync)(ni, id, nasync);
+ if (rc2 != 0)
+ rc = rc2;
+ }
+ lnet_ni_decref(ni);
+ }
+
+ LIBCFS_FREE(nids, maxnids * sizeof(*nids));
+ return rc;
+#endif
}
git://git.whamcloud.com / fs / lustre-release.git / blobdiff