--- /dev/null
+/*
+ * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
+ *
+ * Copyright (c) 2011, 2012, Intel Corporation.
+ *
+ * This file is part of Portals
+ * http://sourceforge.net/projects/sandiaportals/
+ *
+ * Portals 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.
+ *
+ * Portals is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with Portals; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ */
+
+#define DEBUG_SUBSYSTEM S_LNET
+#include "../../include/linux/libcfs/libcfs.h"
+#include "../../include/linux/lnet/lib-lnet.h"
+
+#if defined(LNET_ROUTER)
+
+/* This is really lnet_proc.c. You might need to update sanity test 215
+ * if any file format is changed. */
+
+static struct ctl_table_header *lnet_table_header;
+
+#define CTL_LNET (0x100)
+enum {
+ PSDEV_LNET_STATS = 100,
+ PSDEV_LNET_ROUTES,
+ PSDEV_LNET_ROUTERS,
+ PSDEV_LNET_PEERS,
+ PSDEV_LNET_BUFFERS,
+ PSDEV_LNET_NIS,
+ PSDEV_LNET_PTL_ROTOR,
+};
+
+#define LNET_LOFFT_BITS (sizeof(loff_t) * 8)
+/*
+ * NB: max allowed LNET_CPT_BITS is 8 on 64-bit system and 2 on 32-bit system
+ */
+#define LNET_PROC_CPT_BITS (LNET_CPT_BITS + 1)
+/* change version, 16 bits or 8 bits */
+#define LNET_PROC_VER_BITS max_t(size_t, min_t(size_t, LNET_LOFFT_BITS, 64) / 4, 8)
+
+#define LNET_PROC_HASH_BITS LNET_PEER_HASH_BITS
+/*
+ * bits for peer hash offset
+ * NB: we don't use the highest bit of *ppos because it's signed
+ */
+#define LNET_PROC_HOFF_BITS (LNET_LOFFT_BITS - \
+ LNET_PROC_CPT_BITS - \
+ LNET_PROC_VER_BITS - \
+ LNET_PROC_HASH_BITS - 1)
+/* bits for hash index + position */
+#define LNET_PROC_HPOS_BITS (LNET_PROC_HASH_BITS + LNET_PROC_HOFF_BITS)
+/* bits for peer hash table + hash version */
+#define LNET_PROC_VPOS_BITS (LNET_PROC_HPOS_BITS + LNET_PROC_VER_BITS)
+
+#define LNET_PROC_CPT_MASK ((1ULL << LNET_PROC_CPT_BITS) - 1)
+#define LNET_PROC_VER_MASK ((1ULL << LNET_PROC_VER_BITS) - 1)
+#define LNET_PROC_HASH_MASK ((1ULL << LNET_PROC_HASH_BITS) - 1)
+#define LNET_PROC_HOFF_MASK ((1ULL << LNET_PROC_HOFF_BITS) - 1)
+
+#define LNET_PROC_CPT_GET(pos) \
+ (int)(((pos) >> LNET_PROC_VPOS_BITS) & LNET_PROC_CPT_MASK)
+
+#define LNET_PROC_VER_GET(pos) \
+ (int)(((pos) >> LNET_PROC_HPOS_BITS) & LNET_PROC_VER_MASK)
+
+#define LNET_PROC_HASH_GET(pos) \
+ (int)(((pos) >> LNET_PROC_HOFF_BITS) & LNET_PROC_HASH_MASK)
+
+#define LNET_PROC_HOFF_GET(pos) \
+ (int)((pos) & LNET_PROC_HOFF_MASK)
+
+#define LNET_PROC_POS_MAKE(cpt, ver, hash, off) \
+ (((((loff_t)(cpt)) & LNET_PROC_CPT_MASK) << LNET_PROC_VPOS_BITS) | \
+ ((((loff_t)(ver)) & LNET_PROC_VER_MASK) << LNET_PROC_HPOS_BITS) | \
+ ((((loff_t)(hash)) & LNET_PROC_HASH_MASK) << LNET_PROC_HOFF_BITS) | \
+ ((off) & LNET_PROC_HOFF_MASK))
+
+#define LNET_PROC_VERSION(v) ((unsigned int)((v) & LNET_PROC_VER_MASK))
+
+static int proc_call_handler(void *data, int write, loff_t *ppos,
+ void __user *buffer, size_t *lenp,
+ int (*handler)(void *data, int write,
+ loff_t pos, void __user *buffer, int len))
+{
+ int rc = handler(data, write, *ppos, buffer, *lenp);
+
+ if (rc < 0)
+ return rc;
+
+ if (write) {
+ *ppos += *lenp;
+ } else {
+ *lenp = rc;
+ *ppos += rc;
+ }
+ return 0;
+}
+
+static int __proc_lnet_stats(void *data, int write,
+ loff_t pos, void __user *buffer, int nob)
+{
+ int rc;
+ lnet_counters_t *ctrs;
+ int len;
+ char *tmpstr;
+ const int tmpsiz = 256; /* 7 %u and 4 %llu */
+
+ if (write) {
+ lnet_counters_reset();
+ return 0;
+ }
+
+ /* read */
+
+ LIBCFS_ALLOC(ctrs, sizeof(*ctrs));
+ if (ctrs == NULL)
+ return -ENOMEM;
+
+ LIBCFS_ALLOC(tmpstr, tmpsiz);
+ if (tmpstr == NULL) {
+ LIBCFS_FREE(ctrs, sizeof(*ctrs));
+ return -ENOMEM;
+ }
+
+ lnet_counters_get(ctrs);
+
+ len = snprintf(tmpstr, tmpsiz,
+ "%u %u %u %u %u %u %u %llu %llu %llu %llu",
+ ctrs->msgs_alloc, ctrs->msgs_max,
+ ctrs->errors,
+ ctrs->send_count, ctrs->recv_count,
+ ctrs->route_count, ctrs->drop_count,
+ ctrs->send_length, ctrs->recv_length,
+ ctrs->route_length, ctrs->drop_length);
+
+ if (pos >= min_t(int, len, strlen(tmpstr)))
+ rc = 0;
+ else
+ rc = cfs_trace_copyout_string(buffer, nob,
+ tmpstr + pos, "\n");
+
+ LIBCFS_FREE(tmpstr, tmpsiz);
+ LIBCFS_FREE(ctrs, sizeof(*ctrs));
+ return rc;
+}
+
+static int proc_lnet_stats(struct ctl_table *table, int write,
+ void __user *buffer, size_t *lenp, loff_t *ppos)
+{
+ return proc_call_handler(table->data, write, ppos, buffer, lenp,
+ __proc_lnet_stats);
+}
+
+static int proc_lnet_routes(struct ctl_table *table, int write,
+ void __user *buffer, size_t *lenp, loff_t *ppos)
+{
+ const int tmpsiz = 256;
+ char *tmpstr;
+ char *s;
+ int rc = 0;
+ int len;
+ int ver;
+ int off;
+
+ CLASSERT(sizeof(loff_t) >= 4);
+
+ off = LNET_PROC_HOFF_GET(*ppos);
+ ver = LNET_PROC_VER_GET(*ppos);
+
+ LASSERT(!write);
+
+ if (*lenp == 0)
+ return 0;
+
+ LIBCFS_ALLOC(tmpstr, tmpsiz);
+ if (tmpstr == NULL)
+ return -ENOMEM;
+
+ s = tmpstr; /* points to current position in tmpstr[] */
+
+ if (*ppos == 0) {
+ s += snprintf(s, tmpstr + tmpsiz - s, "Routing %s\n",
+ the_lnet.ln_routing ? "enabled" : "disabled");
+ LASSERT(tmpstr + tmpsiz - s > 0);
+
+ s += snprintf(s, tmpstr + tmpsiz - s, "%-8s %4s %8s %7s %s\n",
+ "net", "hops", "priority", "state", "router");
+ LASSERT(tmpstr + tmpsiz - s > 0);
+
+ lnet_net_lock(0);
+ ver = (unsigned int)the_lnet.ln_remote_nets_version;
+ lnet_net_unlock(0);
+ *ppos = LNET_PROC_POS_MAKE(0, ver, 0, off);
+ } else {
+ struct list_head *n;
+ struct list_head *r;
+ lnet_route_t *route = NULL;
+ lnet_remotenet_t *rnet = NULL;
+ int skip = off - 1;
+ struct list_head *rn_list;
+ int i;
+
+ lnet_net_lock(0);
+
+ if (ver != LNET_PROC_VERSION(the_lnet.ln_remote_nets_version)) {
+ lnet_net_unlock(0);
+ LIBCFS_FREE(tmpstr, tmpsiz);
+ return -ESTALE;
+ }
+
+ for (i = 0; i < LNET_REMOTE_NETS_HASH_SIZE && route == NULL;
+ i++) {
+ rn_list = &the_lnet.ln_remote_nets_hash[i];
+
+ n = rn_list->next;
+
+ while (n != rn_list && route == NULL) {
+ rnet = list_entry(n, lnet_remotenet_t,
+ lrn_list);
+
+ r = rnet->lrn_routes.next;
+
+ while (r != &rnet->lrn_routes) {
+ lnet_route_t *re =
+ list_entry(r, lnet_route_t,
+ lr_list);
+ if (skip == 0) {
+ route = re;
+ break;
+ }
+
+ skip--;
+ r = r->next;
+ }
+
+ n = n->next;
+ }
+ }
+
+ if (route != NULL) {
+ __u32 net = rnet->lrn_net;
+ unsigned int hops = route->lr_hops;
+ unsigned int priority = route->lr_priority;
+ lnet_nid_t nid = route->lr_gateway->lp_nid;
+ int alive = route->lr_gateway->lp_alive;
+
+ s += snprintf(s, tmpstr + tmpsiz - s,
+ "%-8s %4u %8u %7s %s\n",
+ libcfs_net2str(net), hops,
+ priority,
+ alive ? "up" : "down",
+ libcfs_nid2str(nid));
+ LASSERT(tmpstr + tmpsiz - s > 0);
+ }
+
+ lnet_net_unlock(0);
+ }
+
+ len = s - tmpstr; /* how many bytes was written */
+
+ if (len > *lenp) { /* linux-supplied buffer is too small */
+ rc = -EINVAL;
+ } else if (len > 0) { /* wrote something */
+ if (copy_to_user(buffer, tmpstr, len))
+ rc = -EFAULT;
+ else {
+ off += 1;
+ *ppos = LNET_PROC_POS_MAKE(0, ver, 0, off);
+ }
+ }
+
+ LIBCFS_FREE(tmpstr, tmpsiz);
+
+ if (rc == 0)
+ *lenp = len;
+
+ return rc;
+}
+
+static int proc_lnet_routers(struct ctl_table *table, int write,
+ void __user *buffer, size_t *lenp, loff_t *ppos)
+{
+ int rc = 0;
+ char *tmpstr;
+ char *s;
+ const int tmpsiz = 256;
+ int len;
+ int ver;
+ int off;
+
+ off = LNET_PROC_HOFF_GET(*ppos);
+ ver = LNET_PROC_VER_GET(*ppos);
+
+ LASSERT(!write);
+
+ if (*lenp == 0)
+ return 0;
+
+ LIBCFS_ALLOC(tmpstr, tmpsiz);
+ if (tmpstr == NULL)
+ return -ENOMEM;
+
+ s = tmpstr; /* points to current position in tmpstr[] */
+
+ if (*ppos == 0) {
+ s += snprintf(s, tmpstr + tmpsiz - s,
+ "%-4s %7s %9s %6s %12s %9s %8s %7s %s\n",
+ "ref", "rtr_ref", "alive_cnt", "state",
+ "last_ping", "ping_sent", "deadline",
+ "down_ni", "router");
+ LASSERT(tmpstr + tmpsiz - s > 0);
+
+ lnet_net_lock(0);
+ ver = (unsigned int)the_lnet.ln_routers_version;
+ lnet_net_unlock(0);
+ *ppos = LNET_PROC_POS_MAKE(0, ver, 0, off);
+ } else {
+ struct list_head *r;
+ struct lnet_peer *peer = NULL;
+ int skip = off - 1;
+
+ lnet_net_lock(0);
+
+ if (ver != LNET_PROC_VERSION(the_lnet.ln_routers_version)) {
+ lnet_net_unlock(0);
+
+ LIBCFS_FREE(tmpstr, tmpsiz);
+ return -ESTALE;
+ }
+
+ r = the_lnet.ln_routers.next;
+
+ while (r != &the_lnet.ln_routers) {
+ lnet_peer_t *lp = list_entry(r, lnet_peer_t,
+ lp_rtr_list);
+
+ if (skip == 0) {
+ peer = lp;
+ break;
+ }
+
+ skip--;
+ r = r->next;
+ }
+
+ if (peer != NULL) {
+ lnet_nid_t nid = peer->lp_nid;
+ unsigned long now = cfs_time_current();
+ unsigned long deadline = peer->lp_ping_deadline;
+ int nrefs = peer->lp_refcount;
+ int nrtrrefs = peer->lp_rtr_refcount;
+ int alive_cnt = peer->lp_alive_count;
+ int alive = peer->lp_alive;
+ int pingsent = !peer->lp_ping_notsent;
+ int last_ping = cfs_duration_sec(cfs_time_sub(now,
+ peer->lp_ping_timestamp));
+ int down_ni = 0;
+ lnet_route_t *rtr;
+
+ if ((peer->lp_ping_feats &
+ LNET_PING_FEAT_NI_STATUS) != 0) {
+ list_for_each_entry(rtr, &peer->lp_routes,
+ lr_gwlist) {
+ /* downis on any route should be the
+ * number of downis on the gateway */
+ if (rtr->lr_downis != 0) {
+ down_ni = rtr->lr_downis;
+ break;
+ }
+ }
+ }
+
+ if (deadline == 0)
+ s += snprintf(s, tmpstr + tmpsiz - s,
+ "%-4d %7d %9d %6s %12d %9d %8s %7d %s\n",
+ nrefs, nrtrrefs, alive_cnt,
+ alive ? "up" : "down", last_ping,
+ pingsent, "NA", down_ni,
+ libcfs_nid2str(nid));
+ else
+ s += snprintf(s, tmpstr + tmpsiz - s,
+ "%-4d %7d %9d %6s %12d %9d %8lu %7d %s\n",
+ nrefs, nrtrrefs, alive_cnt,
+ alive ? "up" : "down", last_ping,
+ pingsent,
+ cfs_duration_sec(cfs_time_sub(deadline, now)),
+ down_ni, libcfs_nid2str(nid));
+ LASSERT(tmpstr + tmpsiz - s > 0);
+ }
+
+ lnet_net_unlock(0);
+ }
+
+ len = s - tmpstr; /* how many bytes was written */
+
+ if (len > *lenp) { /* linux-supplied buffer is too small */
+ rc = -EINVAL;
+ } else if (len > 0) { /* wrote something */
+ if (copy_to_user(buffer, tmpstr, len))
+ rc = -EFAULT;
+ else {
+ off += 1;
+ *ppos = LNET_PROC_POS_MAKE(0, ver, 0, off);
+ }
+ }
+
+ LIBCFS_FREE(tmpstr, tmpsiz);
+
+ if (rc == 0)
+ *lenp = len;
+
+ return rc;
+}
+
+static int proc_lnet_peers(struct ctl_table *table, int write,
+ void __user *buffer, size_t *lenp, loff_t *ppos)
+{
+ const int tmpsiz = 256;
+ struct lnet_peer_table *ptable;
+ char *tmpstr;
+ char *s;
+ int cpt = LNET_PROC_CPT_GET(*ppos);
+ int ver = LNET_PROC_VER_GET(*ppos);
+ int hash = LNET_PROC_HASH_GET(*ppos);
+ int hoff = LNET_PROC_HOFF_GET(*ppos);
+ int rc = 0;
+ int len;
+
+ CLASSERT(LNET_PROC_HASH_BITS >= LNET_PEER_HASH_BITS);
+ LASSERT(!write);
+
+ if (*lenp == 0)
+ return 0;
+
+ if (cpt >= LNET_CPT_NUMBER) {
+ *lenp = 0;
+ return 0;
+ }
+
+ LIBCFS_ALLOC(tmpstr, tmpsiz);
+ if (tmpstr == NULL)
+ return -ENOMEM;
+
+ s = tmpstr; /* points to current position in tmpstr[] */
+
+ if (*ppos == 0) {
+ s += snprintf(s, tmpstr + tmpsiz - s,
+ "%-24s %4s %5s %5s %5s %5s %5s %5s %5s %s\n",
+ "nid", "refs", "state", "last", "max",
+ "rtr", "min", "tx", "min", "queue");
+ LASSERT(tmpstr + tmpsiz - s > 0);
+
+ hoff++;
+ } else {
+ struct lnet_peer *peer;
+ struct list_head *p;
+ int skip;
+ again:
+ p = NULL;
+ peer = NULL;
+ skip = hoff - 1;
+
+ lnet_net_lock(cpt);
+ ptable = the_lnet.ln_peer_tables[cpt];
+ if (hoff == 1)
+ ver = LNET_PROC_VERSION(ptable->pt_version);
+
+ if (ver != LNET_PROC_VERSION(ptable->pt_version)) {
+ lnet_net_unlock(cpt);
+ LIBCFS_FREE(tmpstr, tmpsiz);
+ return -ESTALE;
+ }
+
+ while (hash < LNET_PEER_HASH_SIZE) {
+ if (p == NULL)
+ p = ptable->pt_hash[hash].next;
+
+ while (p != &ptable->pt_hash[hash]) {
+ lnet_peer_t *lp = list_entry(p, lnet_peer_t,
+ lp_hashlist);
+ if (skip == 0) {
+ peer = lp;
+
+ /* minor optimization: start from idx+1
+ * on next iteration if we've just
+ * drained lp_hashlist */
+ if (lp->lp_hashlist.next ==
+ &ptable->pt_hash[hash]) {
+ hoff = 1;
+ hash++;
+ } else {
+ hoff++;
+ }
+
+ break;
+ }
+
+ skip--;
+ p = lp->lp_hashlist.next;
+ }
+
+ if (peer != NULL)
+ break;
+
+ p = NULL;
+ hoff = 1;
+ hash++;
+ }
+
+ if (peer != NULL) {
+ lnet_nid_t nid = peer->lp_nid;
+ int nrefs = peer->lp_refcount;
+ int lastalive = -1;
+ char *aliveness = "NA";
+ int maxcr = peer->lp_ni->ni_peertxcredits;
+ int txcr = peer->lp_txcredits;
+ int mintxcr = peer->lp_mintxcredits;
+ int rtrcr = peer->lp_rtrcredits;
+ int minrtrcr = peer->lp_minrtrcredits;
+ int txqnob = peer->lp_txqnob;
+
+ if (lnet_isrouter(peer) ||
+ lnet_peer_aliveness_enabled(peer))
+ aliveness = peer->lp_alive ? "up" : "down";
+
+ if (lnet_peer_aliveness_enabled(peer)) {
+ unsigned long now = cfs_time_current();
+ long delta;
+
+ delta = cfs_time_sub(now, peer->lp_last_alive);
+ lastalive = cfs_duration_sec(delta);
+
+ /* No need to mess up peers contents with
+ * arbitrarily long integers - it suffices to
+ * know that lastalive is more than 10000s old
+ */
+ if (lastalive >= 10000)
+ lastalive = 9999;
+ }
+
+ lnet_net_unlock(cpt);
+
+ s += snprintf(s, tmpstr + tmpsiz - s,
+ "%-24s %4d %5s %5d %5d %5d %5d %5d %5d %d\n",
+ libcfs_nid2str(nid), nrefs, aliveness,
+ lastalive, maxcr, rtrcr, minrtrcr, txcr,
+ mintxcr, txqnob);
+ LASSERT(tmpstr + tmpsiz - s > 0);
+
+ } else { /* peer is NULL */
+ lnet_net_unlock(cpt);
+ }
+
+ if (hash == LNET_PEER_HASH_SIZE) {
+ cpt++;
+ hash = 0;
+ hoff = 1;
+ if (peer == NULL && cpt < LNET_CPT_NUMBER)
+ goto again;
+ }
+ }
+
+ len = s - tmpstr; /* how many bytes was written */
+
+ if (len > *lenp) { /* linux-supplied buffer is too small */
+ rc = -EINVAL;
+ } else if (len > 0) { /* wrote something */
+ if (copy_to_user(buffer, tmpstr, len))
+ rc = -EFAULT;
+ else
+ *ppos = LNET_PROC_POS_MAKE(cpt, ver, hash, hoff);
+ }
+
+ LIBCFS_FREE(tmpstr, tmpsiz);
+
+ if (rc == 0)
+ *lenp = len;
+
+ return rc;
+}
+
+static int __proc_lnet_buffers(void *data, int write,
+ loff_t pos, void __user *buffer, int nob)
+{
+ char *s;
+ char *tmpstr;
+ int tmpsiz;
+ int idx;
+ int len;
+ int rc;
+ int i;
+
+ LASSERT(!write);
+
+ /* (4 %d) * 4 * LNET_CPT_NUMBER */
+ tmpsiz = 64 * (LNET_NRBPOOLS + 1) * LNET_CPT_NUMBER;
+ LIBCFS_ALLOC(tmpstr, tmpsiz);
+ if (tmpstr == NULL)
+ return -ENOMEM;
+
+ s = tmpstr; /* points to current position in tmpstr[] */
+
+ s += snprintf(s, tmpstr + tmpsiz - s,
+ "%5s %5s %7s %7s\n",
+ "pages", "count", "credits", "min");
+ LASSERT(tmpstr + tmpsiz - s > 0);
+
+ if (the_lnet.ln_rtrpools == NULL)
+ goto out; /* I'm not a router */
+
+ for (idx = 0; idx < LNET_NRBPOOLS; idx++) {
+ lnet_rtrbufpool_t *rbp;
+
+ lnet_net_lock(LNET_LOCK_EX);
+ cfs_percpt_for_each(rbp, i, the_lnet.ln_rtrpools) {
+ s += snprintf(s, tmpstr + tmpsiz - s,
+ "%5d %5d %7d %7d\n",
+ rbp[idx].rbp_npages,
+ rbp[idx].rbp_nbuffers,
+ rbp[idx].rbp_credits,
+ rbp[idx].rbp_mincredits);
+ LASSERT(tmpstr + tmpsiz - s > 0);
+ }
+ lnet_net_unlock(LNET_LOCK_EX);
+ }
+
+ out:
+ len = s - tmpstr;
+
+ if (pos >= min_t(int, len, strlen(tmpstr)))
+ rc = 0;
+ else
+ rc = cfs_trace_copyout_string(buffer, nob,
+ tmpstr + pos, NULL);
+
+ LIBCFS_FREE(tmpstr, tmpsiz);
+ return rc;
+}
+
+static int proc_lnet_buffers(struct ctl_table *table, int write,
+ void __user *buffer, size_t *lenp, loff_t *ppos)
+{
+ return proc_call_handler(table->data, write, ppos, buffer, lenp,
+ __proc_lnet_buffers);
+}
+
+static int proc_lnet_nis(struct ctl_table *table, int write,
+ void __user *buffer, size_t *lenp, loff_t *ppos)
+{
+ int tmpsiz = 128 * LNET_CPT_NUMBER;
+ int rc = 0;
+ char *tmpstr;
+ char *s;
+ int len;
+
+ LASSERT(!write);
+
+ if (*lenp == 0)
+ return 0;
+
+ LIBCFS_ALLOC(tmpstr, tmpsiz);
+ if (tmpstr == NULL)
+ return -ENOMEM;
+
+ s = tmpstr; /* points to current position in tmpstr[] */
+
+ if (*ppos == 0) {
+ s += snprintf(s, tmpstr + tmpsiz - s,
+ "%-24s %6s %5s %4s %4s %4s %5s %5s %5s\n",
+ "nid", "status", "alive", "refs", "peer",
+ "rtr", "max", "tx", "min");
+ LASSERT(tmpstr + tmpsiz - s > 0);
+ } else {
+ struct list_head *n;
+ lnet_ni_t *ni = NULL;
+ int skip = *ppos - 1;
+
+ lnet_net_lock(0);
+
+ n = the_lnet.ln_nis.next;
+
+ while (n != &the_lnet.ln_nis) {
+ lnet_ni_t *a_ni = list_entry(n, lnet_ni_t, ni_list);
+
+ if (skip == 0) {
+ ni = a_ni;
+ break;
+ }
+
+ skip--;
+ n = n->next;
+ }
+
+ if (ni != NULL) {
+ struct lnet_tx_queue *tq;
+ char *stat;
+ long now = get_seconds();
+ int last_alive = -1;
+ int i;
+ int j;
+
+ if (the_lnet.ln_routing)
+ last_alive = now - ni->ni_last_alive;
+
+ /* @lo forever alive */
+ if (ni->ni_lnd->lnd_type == LOLND)
+ last_alive = 0;
+
+ lnet_ni_lock(ni);
+ LASSERT(ni->ni_status != NULL);
+ stat = (ni->ni_status->ns_status ==
+ LNET_NI_STATUS_UP) ? "up" : "down";
+ lnet_ni_unlock(ni);
+
+ /* we actually output credits information for
+ * TX queue of each partition */
+ cfs_percpt_for_each(tq, i, ni->ni_tx_queues) {
+ for (j = 0; ni->ni_cpts != NULL &&
+ j < ni->ni_ncpts; j++) {
+ if (i == ni->ni_cpts[j])
+ break;
+ }
+
+ if (j == ni->ni_ncpts)
+ continue;
+
+ if (i != 0)
+ lnet_net_lock(i);
+
+ s += snprintf(s, tmpstr + tmpsiz - s,
+ "%-24s %6s %5d %4d %4d %4d %5d %5d %5d\n",
+ libcfs_nid2str(ni->ni_nid), stat,
+ last_alive, *ni->ni_refs[i],
+ ni->ni_peertxcredits,
+ ni->ni_peerrtrcredits,
+ tq->tq_credits_max,
+ tq->tq_credits, tq->tq_credits_min);
+ if (i != 0)
+ lnet_net_unlock(i);
+ }
+ LASSERT(tmpstr + tmpsiz - s > 0);
+ }
+
+ lnet_net_unlock(0);
+ }
+
+ len = s - tmpstr; /* how many bytes was written */
+
+ if (len > *lenp) { /* linux-supplied buffer is too small */
+ rc = -EINVAL;
+ } else if (len > 0) { /* wrote something */
+ if (copy_to_user(buffer, tmpstr, len))
+ rc = -EFAULT;
+ else
+ *ppos += 1;
+ }
+
+ LIBCFS_FREE(tmpstr, tmpsiz);
+
+ if (rc == 0)
+ *lenp = len;
+
+ return rc;
+}
+
+struct lnet_portal_rotors {
+ int pr_value;
+ const char *pr_name;
+ const char *pr_desc;
+};
+
+static struct lnet_portal_rotors portal_rotors[] = {
+ {
+ .pr_value = LNET_PTL_ROTOR_OFF,
+ .pr_name = "OFF",
+ .pr_desc = "Turn off message rotor for wildcard portals"
+ },
+ {
+ .pr_value = LNET_PTL_ROTOR_ON,
+ .pr_name = "ON",
+ .pr_desc = "round-robin dispatch all PUT messages for wildcard portals"
+ },
+ {
+ .pr_value = LNET_PTL_ROTOR_RR_RT,
+ .pr_name = "RR_RT",
+ .pr_desc = "round-robin dispatch routed PUT message for wildcard portals"
+ },
+ {
+ .pr_value = LNET_PTL_ROTOR_HASH_RT,
+ .pr_name = "HASH_RT",
+ .pr_desc = "dispatch routed PUT message by hashing source NID for wildcard portals"
+ },
+ {
+ .pr_value = -1,
+ .pr_name = NULL,
+ .pr_desc = NULL
+ },
+};
+
+extern int portal_rotor;
+
+static int __proc_lnet_portal_rotor(void *data, int write,
+ loff_t pos, void __user *buffer, int nob)
+{
+ const int buf_len = 128;
+ char *buf;
+ char *tmp;
+ int rc;
+ int i;
+
+ LIBCFS_ALLOC(buf, buf_len);
+ if (buf == NULL)
+ return -ENOMEM;
+
+ if (!write) {
+ lnet_res_lock(0);
+
+ for (i = 0; portal_rotors[i].pr_value >= 0; i++) {
+ if (portal_rotors[i].pr_value == portal_rotor)
+ break;
+ }
+
+ LASSERT(portal_rotors[i].pr_value == portal_rotor);
+ lnet_res_unlock(0);
+
+ rc = snprintf(buf, buf_len,
+ "{\n\tportals: all\n"
+ "\trotor: %s\n\tdescription: %s\n}",
+ portal_rotors[i].pr_name,
+ portal_rotors[i].pr_desc);
+
+ if (pos >= min_t(int, rc, buf_len)) {
+ rc = 0;
+ } else {
+ rc = cfs_trace_copyout_string(buffer, nob,
+ buf + pos, "\n");
+ }
+ goto out;
+ }
+
+ rc = cfs_trace_copyin_string(buf, buf_len, buffer, nob);
+ if (rc < 0)
+ goto out;
+
+ tmp = cfs_trimwhite(buf);
+
+ rc = -EINVAL;
+ lnet_res_lock(0);
+ for (i = 0; portal_rotors[i].pr_name != NULL; i++) {
+ if (strncasecmp(portal_rotors[i].pr_name, tmp,
+ strlen(portal_rotors[i].pr_name)) == 0) {
+ portal_rotor = portal_rotors[i].pr_value;
+ rc = 0;
+ break;
+ }
+ }
+ lnet_res_unlock(0);
+out:
+ LIBCFS_FREE(buf, buf_len);
+ return rc;
+}
+
+static int proc_lnet_portal_rotor(struct ctl_table *table, int write,
+ void __user *buffer, size_t *lenp,
+ loff_t *ppos)
+{
+ return proc_call_handler(table->data, write, ppos, buffer, lenp,
+ __proc_lnet_portal_rotor);
+}
+
+static struct ctl_table lnet_table[] = {
+ /*
+ * NB No .strategy entries have been provided since sysctl(8) prefers
+ * to go via /proc for portability.
+ */
+ {
+ .procname = "stats",
+ .mode = 0644,
+ .proc_handler = &proc_lnet_stats,
+ },
+ {
+ .procname = "routes",
+ .mode = 0444,
+ .proc_handler = &proc_lnet_routes,
+ },
+ {
+ .procname = "routers",
+ .mode = 0444,
+ .proc_handler = &proc_lnet_routers,
+ },
+ {
+ .procname = "peers",
+ .mode = 0444,
+ .proc_handler = &proc_lnet_peers,
+ },
+ {
+ .procname = "buffers",
+ .mode = 0444,
+ .proc_handler = &proc_lnet_buffers,
+ },
+ {
+ .procname = "nis",
+ .mode = 0444,
+ .proc_handler = &proc_lnet_nis,
+ },
+ {
+ .procname = "portal_rotor",
+ .mode = 0644,
+ .proc_handler = &proc_lnet_portal_rotor,
+ },
+ {
+ }
+};
+
+static struct ctl_table top_table[] = {
+ {
+ .procname = "lnet",
+ .mode = 0555,
+ .data = NULL,
+ .maxlen = 0,
+ .child = lnet_table,
+ },
+ {
+ }
+};
+
+void
+lnet_proc_init(void)
+{
+ if (lnet_table_header == NULL)
+ lnet_table_header = register_sysctl_table(top_table);
+}
+
+void
+lnet_proc_fini(void)
+{
+ if (lnet_table_header != NULL)
+ unregister_sysctl_table(lnet_table_header);
+
+ lnet_table_header = NULL;
+}
+
+#else
+
+void
+lnet_proc_init(void)
+{
+}
+
+void
+lnet_proc_fini(void)
+{
+}
+
+#endif
Code Review / kvmfornfv.git / blobdiff