diff options
Diffstat (limited to 'drivers/staging/lustre/lnet/lnet/router_proc.c')
| -rw-r--r-- | drivers/staging/lustre/lnet/lnet/router_proc.c | 950 |
1 files changed, 950 insertions, 0 deletions
diff --git a/drivers/staging/lustre/lnet/lnet/router_proc.c b/drivers/staging/lustre/lnet/lnet/router_proc.c new file mode 100644 index 000000000000..3084b0c75983 --- /dev/null +++ b/drivers/staging/lustre/lnet/lnet/router_proc.c @@ -0,0 +1,950 @@ +/* + * 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 <linux/libcfs/libcfs.h> +#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 ctl_table_header_t *lnet_table_header = NULL; + +#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(((MIN(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_lnet_stats(void *data, int write, + loff_t pos, void *buffer, int nob) +{ + int rc; + lnet_counters_t *ctrs; + int len; + char *tmpstr; + const int tmpsiz = 256; /* 7 %u and 4 LPU64 */ + + 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 "LPU64" "LPU64" " + LPU64" "LPU64, + 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; +} + +DECLARE_PROC_HANDLER(proc_lnet_stats); + +int LL_PROC_PROTO(proc_lnet_routes) +{ + const int tmpsiz = 256; + char *tmpstr; + char *s; + int rc = 0; + int len; + int ver; + int off; + + DECLARE_LL_PROC_PPOS_DECL; + + 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 %7s %s\n", + "net", "hops", "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; + lnet_nid_t nid = route->lr_gateway->lp_nid; + int alive = route->lr_gateway->lp_alive; + + s += snprintf(s, tmpstr + tmpsiz - s, + "%-8s %4u %7s %s\n", + libcfs_net2str(net), hops, + 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; +} + +int LL_PROC_PROTO(proc_lnet_routers) +{ + int rc = 0; + char *tmpstr; + char *s; + const int tmpsiz = 256; + int len; + int ver; + int off; + + DECLARE_LL_PROC_PPOS_DECL; + + 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; + cfs_time_t now = cfs_time_current(); + cfs_time_t 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; +} + +int LL_PROC_PROTO(proc_lnet_peers) +{ + 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)) { + cfs_time_t now = cfs_time_current(); + cfs_duration_t 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 *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; +} + +DECLARE_PROC_HANDLER(proc_lnet_buffers); + +int LL_PROC_PROTO(proc_lnet_nis) +{ + int tmpsiz = 128 * LNET_CPT_NUMBER; + int rc = 0; + char *tmpstr; + char *s; + int len; + + DECLARE_LL_PROC_PPOS_DECL; + + 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 = cfs_time_current_sec(); + 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 *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 (cfs_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; +} +DECLARE_PROC_HANDLER(proc_lnet_portal_rotor); + +static ctl_table_t lnet_table[] = { + /* + * NB No .strategy entries have been provided since sysctl(8) prefers + * to go via /proc for portability. + */ + { + INIT_CTL_NAME(PSDEV_LNET_STATS) + .procname = "stats", + .mode = 0644, + .proc_handler = &proc_lnet_stats, + }, + { + INIT_CTL_NAME(PSDEV_LNET_ROUTES) + .procname = "routes", + .mode = 0444, + .proc_handler = &proc_lnet_routes, + }, + { + INIT_CTL_NAME(PSDEV_LNET_ROUTERS) + .procname = "routers", + .mode = 0444, + .proc_handler = &proc_lnet_routers, + }, + { + INIT_CTL_NAME(PSDEV_LNET_PEERS) + .procname = "peers", + .mode = 0444, + .proc_handler = &proc_lnet_peers, + }, + { + INIT_CTL_NAME(PSDEV_LNET_PEERS) + .procname = "buffers", + .mode = 0444, + .proc_handler = &proc_lnet_buffers, + }, + { + INIT_CTL_NAME(PSDEV_LNET_NIS) + .procname = "nis", + .mode = 0444, + .proc_handler = &proc_lnet_nis, + }, + { + INIT_CTL_NAME(PSDEV_LNET_PTL_ROTOR) + .procname = "portal_rotor", + .mode = 0644, + .proc_handler = &proc_lnet_portal_rotor, + }, + { + INIT_CTL_NAME(0) + } +}; + +static ctl_table_t top_table[] = { + { + INIT_CTL_NAME(CTL_LNET) + .procname = "lnet", + .mode = 0555, + .data = NULL, + .maxlen = 0, + .child = lnet_table, + }, + { + INIT_CTL_NAME(0) + } +}; + +void +lnet_proc_init(void) +{ +#ifdef CONFIG_SYSCTL + if (lnet_table_header == NULL) + lnet_table_header = cfs_register_sysctl_table(top_table, 0); +#endif +} + +void +lnet_proc_fini(void) +{ +#ifdef CONFIG_SYSCTL + if (lnet_table_header != NULL) + unregister_sysctl_table(lnet_table_header); + + lnet_table_header = NULL; +#endif +} + +#else + +void +lnet_proc_init(void) +{ +} + +void +lnet_proc_fini(void) +{ +} + +#endif |