* Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
* Use is subject to license terms.
*
- * Copyright (c) 2011, Whamcloud, Inc.
+ * Copyright (c) 2011, 2014, Intel Corporation.
*/
/*
* This file is part of Lustre, http://www.lustre.org/
#define DEBUG_SUBSYSTEM S_LNET
#include <lnet/lib-lnet.h>
+#include <lnet/lib-dlc.h>
+#ifdef __KERNEL__
+#include <linux/log2.h>
+#endif
#ifdef __KERNEL__
#define D_LNI D_CONSOLE
#endif
lnet_t the_lnet; /* THE state of the network */
+EXPORT_SYMBOL(the_lnet);
#ifdef __KERNEL__
CFS_MODULE_PARM(routes, "s", charp, 0444,
"routes to non-local networks");
-char *
+static int rnet_htable_size = LNET_REMOTE_NETS_HASH_DEFAULT;
+CFS_MODULE_PARM(rnet_htable_size, "i", int, 0444,
+ "size of remote network hash table");
+
+static int lnet_ping(lnet_process_id_t id, int timeout_ms,
+ lnet_process_id_t *ids, int n_ids);
+
+static char *
lnet_get_routes(void)
{
return routes;
}
-char *
+static char *
lnet_get_networks(void)
{
- char *nets;
- int rc;
+ char *nets;
+ int rc;
- if (*networks != 0 && *ip2nets != 0) {
- LCONSOLE_ERROR_MSG(0x101, "Please specify EITHER 'networks' or "
- "'ip2nets' but not both at once\n");
- return NULL;
- }
+ if (*networks != 0 && *ip2nets != 0) {
+ LCONSOLE_ERROR_MSG(0x101, "Please specify EITHER 'networks' or "
+ "'ip2nets' but not both at once\n");
+ return NULL;
+ }
- if (*ip2nets != 0) {
- rc = lnet_parse_ip2nets(&nets, ip2nets);
- return (rc == 0) ? nets : NULL;
- }
+ if (*ip2nets != 0) {
+ rc = lnet_parse_ip2nets(&nets, ip2nets);
+ return (rc == 0) ? nets : NULL;
+ }
- if (*networks != 0)
- return networks;
+ if (*networks != 0)
+ return networks;
- return "tcp";
+ return "tcp";
}
-void
+static void
lnet_init_locks(void)
{
- cfs_spin_lock_init(&the_lnet.ln_lock);
- cfs_spin_lock_init(&the_lnet.ln_eq_wait_lock);
- cfs_waitq_init(&the_lnet.ln_eq_waitq);
- cfs_mutex_init(&the_lnet.ln_lnd_mutex);
- cfs_mutex_init(&the_lnet.ln_api_mutex);
+ spin_lock_init(&the_lnet.ln_eq_wait_lock);
+ init_waitqueue_head(&the_lnet.ln_eq_waitq);
+ mutex_init(&the_lnet.ln_lnd_mutex);
+ mutex_init(&the_lnet.ln_api_mutex);
}
-void
+static void
lnet_fini_locks(void)
{
}
#else
-char *
+static char *
lnet_get_routes(void)
{
char *str = getenv("LNET_ROUTES");
return (str == NULL) ? "" : str;
}
-char *
+static char *
lnet_get_networks (void)
{
- static char default_networks[256];
- char *networks = getenv ("LNET_NETWORKS");
- char *ip2nets = getenv ("LNET_IP2NETS");
- char *str;
- char *sep;
- int len;
- int nob;
- int rc;
- cfs_list_t *tmp;
-
-#ifdef NOT_YET
- if (networks != NULL && ip2nets != NULL) {
- LCONSOLE_ERROR_MSG(0x103, "Please set EITHER 'LNET_NETWORKS' or"
- " 'LNET_IP2NETS' but not both at once\n");
- return NULL;
- }
+ static char default_networks[256];
+ char *networks = getenv("LNET_NETWORKS");
+ char *str;
+ char *sep;
+ int len;
+ int nob;
+ struct list_head *tmp;
- if (ip2nets != NULL) {
- rc = lnet_parse_ip2nets(&networks, ip2nets);
- return (rc == 0) ? networks : NULL;
- }
-#else
- SET_BUT_UNUSED(ip2nets);
- SET_BUT_UNUSED(rc);
-#endif
- if (networks != NULL)
- return networks;
+ if (networks != NULL)
+ return networks;
/* In userland, the default 'networks=' is the list of known net types */
-
len = sizeof(default_networks);
str = default_networks;
*str = 0;
sep = "";
- cfs_list_for_each (tmp, &the_lnet.ln_lnds) {
- lnd_t *lnd = cfs_list_entry(tmp, lnd_t, lnd_list);
+ list_for_each(tmp, &the_lnet.ln_lnds) {
+ lnd_t *lnd = list_entry(tmp, lnd_t, lnd_list);
- nob = snprintf(str, len, "%s%s", sep,
- libcfs_lnd2str(lnd->lnd_type));
- len -= nob;
- if (len < 0) {
- /* overflowed the string; leave it where it was */
- *str = 0;
- break;
- }
-
- str += nob;
- sep = ",";
- }
+ nob = snprintf(str, len, "%s%s", sep,
+ libcfs_lnd2str(lnd->lnd_type));
+ if (nob >= len) {
+ /* overflowed the string; leave it where it was */
+ *str = 0;
+ break;
+ }
+ len -= nob;
+ str += nob;
+ sep = ",";
+ }
- return default_networks;
+ return default_networks;
}
# ifndef HAVE_LIBPTHREAD
-void lnet_init_locks(void)
+static void lnet_init_locks(void)
{
- the_lnet.ln_lock = 0;
the_lnet.ln_eq_wait_lock = 0;
the_lnet.ln_lnd_mutex = 0;
the_lnet.ln_api_mutex = 0;
}
-void lnet_fini_locks(void)
+static void lnet_fini_locks(void)
{
LASSERT(the_lnet.ln_api_mutex == 0);
LASSERT(the_lnet.ln_lnd_mutex == 0);
- LASSERT(the_lnet.ln_lock == 0);
LASSERT(the_lnet.ln_eq_wait_lock == 0);
}
# else
-void lnet_init_locks(void)
+static void lnet_init_locks(void)
{
pthread_cond_init(&the_lnet.ln_eq_cond, NULL);
- pthread_mutex_init(&the_lnet.ln_lock, NULL);
pthread_mutex_init(&the_lnet.ln_eq_wait_lock, NULL);
pthread_mutex_init(&the_lnet.ln_lnd_mutex, NULL);
pthread_mutex_init(&the_lnet.ln_api_mutex, NULL);
}
-void lnet_fini_locks(void)
+static void lnet_fini_locks(void)
{
pthread_mutex_destroy(&the_lnet.ln_api_mutex);
pthread_mutex_destroy(&the_lnet.ln_lnd_mutex);
- pthread_mutex_destroy(&the_lnet.ln_lock);
pthread_mutex_destroy(&the_lnet.ln_eq_wait_lock);
pthread_cond_destroy(&the_lnet.ln_eq_cond);
}
#endif
static int
-lnet_create_locks(void)
+lnet_create_remote_nets_table(void)
{
- lnet_init_locks();
+ int i;
+ struct list_head *hash;
+
+ LASSERT(the_lnet.ln_remote_nets_hash == NULL);
+ LASSERT(the_lnet.ln_remote_nets_hbits > 0);
+ LIBCFS_ALLOC(hash, LNET_REMOTE_NETS_HASH_SIZE * sizeof(*hash));
+ if (hash == NULL) {
+ CERROR("Failed to create remote nets hash table\n");
+ return -ENOMEM;
+ }
- the_lnet.ln_res_lock = cfs_percpt_lock_alloc(lnet_cpt_table());
- if (the_lnet.ln_res_lock != NULL)
- return 0;
+ for (i = 0; i < LNET_REMOTE_NETS_HASH_SIZE; i++)
+ INIT_LIST_HEAD(&hash[i]);
+ the_lnet.ln_remote_nets_hash = hash;
+ return 0;
+}
- lnet_fini_locks();
- return -ENOMEM;
+static void
+lnet_destroy_remote_nets_table(void)
+{
+ int i;
+
+ if (the_lnet.ln_remote_nets_hash == NULL)
+ return;
+
+ for (i = 0; i < LNET_REMOTE_NETS_HASH_SIZE; i++)
+ LASSERT(list_empty(&the_lnet.ln_remote_nets_hash[i]));
+
+ LIBCFS_FREE(the_lnet.ln_remote_nets_hash,
+ LNET_REMOTE_NETS_HASH_SIZE *
+ sizeof(the_lnet.ln_remote_nets_hash[0]));
+ the_lnet.ln_remote_nets_hash = NULL;
}
static void
the_lnet.ln_res_lock = NULL;
}
+ if (the_lnet.ln_net_lock != NULL) {
+ cfs_percpt_lock_free(the_lnet.ln_net_lock);
+ the_lnet.ln_net_lock = NULL;
+ }
+
lnet_fini_locks();
}
-void lnet_assert_wire_constants (void)
+static int
+lnet_create_locks(void)
+{
+ lnet_init_locks();
+
+ the_lnet.ln_res_lock = cfs_percpt_lock_alloc(lnet_cpt_table());
+ if (the_lnet.ln_res_lock == NULL)
+ goto failed;
+
+ the_lnet.ln_net_lock = cfs_percpt_lock_alloc(lnet_cpt_table());
+ if (the_lnet.ln_net_lock == NULL)
+ goto failed;
+
+ return 0;
+
+ failed:
+ lnet_destroy_locks();
+ return -ENOMEM;
+}
+
+static void lnet_assert_wire_constants(void)
{
/* Wire protocol assertions generated by 'wirecheck'
* running on Linux robert.bartonsoftware.com 2.6.8-1.521
CLASSERT ((int)sizeof(((lnet_hdr_t *)0)->msg.hello.type) == 4);
}
-lnd_t *
+static lnd_t *
lnet_find_lnd_by_type (int type)
{
- lnd_t *lnd;
- cfs_list_t *tmp;
+ lnd_t *lnd;
+ struct list_head *tmp;
- /* holding lnd mutex */
- cfs_list_for_each (tmp, &the_lnet.ln_lnds) {
- lnd = cfs_list_entry(tmp, lnd_t, lnd_list);
+ /* holding lnd mutex */
+ list_for_each(tmp, &the_lnet.ln_lnds) {
+ lnd = list_entry(tmp, lnd_t, lnd_list);
- if ((int)lnd->lnd_type == type)
- return lnd;
- }
-
- return NULL;
+ if ((int)lnd->lnd_type == type)
+ return lnd;
+ }
+ return NULL;
}
void
lnet_register_lnd (lnd_t *lnd)
{
- LNET_MUTEX_LOCK(&the_lnet.ln_lnd_mutex);
+ LNET_MUTEX_LOCK(&the_lnet.ln_lnd_mutex);
- LASSERT (the_lnet.ln_init);
- LASSERT (libcfs_isknown_lnd(lnd->lnd_type));
- LASSERT (lnet_find_lnd_by_type(lnd->lnd_type) == NULL);
+ LASSERT(the_lnet.ln_init);
+ LASSERT(libcfs_isknown_lnd(lnd->lnd_type));
+ LASSERT(lnet_find_lnd_by_type(lnd->lnd_type) == NULL);
- cfs_list_add_tail (&lnd->lnd_list, &the_lnet.ln_lnds);
- lnd->lnd_refcount = 0;
+ list_add_tail(&lnd->lnd_list, &the_lnet.ln_lnds);
+ lnd->lnd_refcount = 0;
- CDEBUG(D_NET, "%s LND registered\n", libcfs_lnd2str(lnd->lnd_type));
+ CDEBUG(D_NET, "%s LND registered\n", libcfs_lnd2str(lnd->lnd_type));
- LNET_MUTEX_UNLOCK(&the_lnet.ln_lnd_mutex);
+ LNET_MUTEX_UNLOCK(&the_lnet.ln_lnd_mutex);
}
+EXPORT_SYMBOL(lnet_register_lnd);
void
lnet_unregister_lnd (lnd_t *lnd)
{
- LNET_MUTEX_LOCK(&the_lnet.ln_lnd_mutex);
+ LNET_MUTEX_LOCK(&the_lnet.ln_lnd_mutex);
- LASSERT (the_lnet.ln_init);
- LASSERT (lnet_find_lnd_by_type(lnd->lnd_type) == lnd);
- LASSERT (lnd->lnd_refcount == 0);
+ LASSERT(the_lnet.ln_init);
+ LASSERT(lnet_find_lnd_by_type(lnd->lnd_type) == lnd);
+ LASSERT(lnd->lnd_refcount == 0);
- cfs_list_del (&lnd->lnd_list);
- CDEBUG(D_NET, "%s LND unregistered\n", libcfs_lnd2str(lnd->lnd_type));
+ list_del(&lnd->lnd_list);
+ CDEBUG(D_NET, "%s LND unregistered\n", libcfs_lnd2str(lnd->lnd_type));
- LNET_MUTEX_UNLOCK(&the_lnet.ln_lnd_mutex);
+ LNET_MUTEX_UNLOCK(&the_lnet.ln_lnd_mutex);
}
+EXPORT_SYMBOL(lnet_unregister_lnd);
void
lnet_counters_get(lnet_counters_t *counters)
{
lnet_counters_t *ctr;
+ int i;
memset(counters, 0, sizeof(*counters));
- LNET_LOCK();
- ctr = the_lnet.ln_counters;
- do { /* iterate over counters of all CPTs in upcoming patches */
+ lnet_net_lock(LNET_LOCK_EX);
+
+ cfs_percpt_for_each(ctr, i, the_lnet.ln_counters) {
counters->msgs_max += ctr->msgs_max;
counters->msgs_alloc += ctr->msgs_alloc;
counters->errors += ctr->errors;
counters->send_count += ctr->send_count;
counters->recv_count += ctr->recv_count;
counters->route_count += ctr->route_count;
- counters->drop_length += ctr->drop_length;
+ counters->drop_count += ctr->drop_count;
counters->send_length += ctr->send_length;
counters->recv_length += ctr->recv_length;
counters->route_length += ctr->route_length;
counters->drop_length += ctr->drop_length;
- } while (0);
- LNET_UNLOCK();
+ }
+ lnet_net_unlock(LNET_LOCK_EX);
}
EXPORT_SYMBOL(lnet_counters_get);
lnet_counters_reset(void)
{
lnet_counters_t *counters;
+ int i;
+
+ lnet_net_lock(LNET_LOCK_EX);
- LNET_LOCK();
- counters = the_lnet.ln_counters;
- do { /* iterate over counters of all CPTs in upcoming patches */
+ cfs_percpt_for_each(counters, i, the_lnet.ln_counters)
memset(counters, 0, sizeof(lnet_counters_t));
- } while (0);
- LNET_UNLOCK();
+
+ lnet_net_unlock(LNET_LOCK_EX);
}
EXPORT_SYMBOL(lnet_counters_reset);
#ifdef LNET_USE_LIB_FREELIST
int
-lnet_freelist_init (lnet_freelist_t *fl, int n, int size)
+lnet_freelist_init(lnet_freelist_t *fl, int n, int size)
{
char *space;
if (space == NULL)
return (-ENOMEM);
- CFS_INIT_LIST_HEAD (&fl->fl_list);
- fl->fl_objs = space;
- fl->fl_nobjs = n;
- fl->fl_objsize = size;
+ INIT_LIST_HEAD(&fl->fl_list);
+ fl->fl_objs = space;
+ fl->fl_nobjs = n;
+ fl->fl_objsize = size;
- do
- {
- memset (space, 0, size);
- cfs_list_add ((cfs_list_t *)space, &fl->fl_list);
- space += size;
- } while (--n != 0);
+ do {
+ list_add((struct list_head *)space, &fl->fl_list);
+ space += size;
+ } while (--n != 0);
- return (0);
+ return 0;
}
void
-lnet_freelist_fini (lnet_freelist_t *fl)
+lnet_freelist_fini(lnet_freelist_t *fl)
{
- cfs_list_t *el;
- int count;
+ struct list_head *el;
+ int count;
if (fl->fl_nobjs == 0)
return;
#endif /* LNET_USE_LIB_FREELIST */
-__u64
-lnet_create_interface_cookie (void)
+static __u64 lnet_create_interface_cookie(void)
{
- /* NB the interface cookie in wire handles guards against delayed
- * replies and ACKs appearing valid after reboot. Initialisation time,
- * even if it's only implemented to millisecond resolution is probably
- * easily good enough. */
- struct timeval tv;
- __u64 cookie;
+ /* NB the interface cookie in wire handles guards against delayed
+ * replies and ACKs appearing valid after reboot. Initialisation time,
+ * even if it's only implemented to millisecond resolution is probably
+ * easily good enough. */
+ struct timeval tv;
+ __u64 cookie;
#ifndef __KERNEL__
- int rc = gettimeofday (&tv, NULL);
- LASSERT (rc == 0);
+ int rc = gettimeofday (&tv, NULL);
+ LASSERT (rc == 0);
#else
- cfs_gettimeofday(&tv);
+ do_gettimeofday(&tv);
#endif
- cookie = tv.tv_sec;
- cookie *= 1000000;
- cookie += tv.tv_usec;
- return cookie;
+ cookie = tv.tv_sec;
+ cookie *= 1000000;
+ cookie += tv.tv_usec;
+ return cookie;
}
static char *
}
}
-void
+static void
lnet_res_container_cleanup(struct lnet_res_container *rec)
{
int count = 0;
- if (rec->rec_type == 0) /* not set yet, it's a uninitialized */
+ if (rec->rec_type == 0) /* not set yet, it's uninitialized */
return;
- while (!cfs_list_empty(&rec->rec_active)) {
- cfs_list_t *e = rec->rec_active.next;
+ while (!list_empty(&rec->rec_active)) {
+ struct list_head *e = rec->rec_active.next;
- cfs_list_del_init(e);
+ list_del_init(e);
if (rec->rec_type == LNET_COOKIE_TYPE_EQ) {
- lnet_eq_free(cfs_list_entry(e, lnet_eq_t, eq_list));
+ lnet_eq_free(list_entry(e, lnet_eq_t, eq_list));
} else if (rec->rec_type == LNET_COOKIE_TYPE_MD) {
- lnet_md_free(cfs_list_entry(e, lnet_libmd_t, md_list));
+ lnet_md_free(list_entry(e, lnet_libmd_t, md_list));
} else { /* NB: Active MEs should be attached on portals */
LBUG();
rec->rec_type = 0; /* mark it as finalized */
}
-int
+static int
lnet_res_container_setup(struct lnet_res_container *rec,
int cpt, int type, int objnum, int objsz)
{
LASSERT(rec->rec_type == 0);
rec->rec_type = type;
- CFS_INIT_LIST_HEAD(&rec->rec_active);
+ INIT_LIST_HEAD(&rec->rec_active);
#ifdef LNET_USE_LIB_FREELIST
memset(&rec->rec_freelist, 0, sizeof(rec->rec_freelist));
}
for (i = 0; i < LNET_LH_HASH_SIZE; i++)
- CFS_INIT_LIST_HEAD(&rec->rec_lh_hash[i]);
+ INIT_LIST_HEAD(&rec->rec_lh_hash[i]);
return 0;
lnet_res_lh_lookup(struct lnet_res_container *rec, __u64 cookie)
{
/* ALWAYS called with lnet_res_lock held */
- cfs_list_t *head;
+ struct list_head *head;
lnet_libhandle_t *lh;
unsigned int hash;
- if ((cookie & (LNET_COOKIE_TYPES - 1)) != rec->rec_type)
+ if ((cookie & LNET_COOKIE_MASK) != rec->rec_type)
return NULL;
hash = cookie >> (LNET_COOKIE_TYPE_BITS + LNET_CPT_BITS);
head = &rec->rec_lh_hash[hash & LNET_LH_HASH_MASK];
- cfs_list_for_each_entry(lh, head, lh_hash_chain) {
+ list_for_each_entry(lh, head, lh_hash_chain) {
if (lh->lh_cookie == cookie)
return lh;
}
hash = (lh->lh_cookie >> ibits) & LNET_LH_HASH_MASK;
- cfs_list_add(&lh->lh_hash_chain, &rec->rec_lh_hash[hash]);
+ list_add(&lh->lh_hash_chain, &rec->rec_lh_hash[hash]);
}
#ifndef __KERNEL__
}
#endif
-int lnet_unprepare(void);
+static int lnet_unprepare(void);
-int
+static int
lnet_prepare(lnet_pid_t requested_pid)
{
- /* Prepare to bring up the network */
+ /* Prepare to bring up the network */
struct lnet_res_container **recs;
int rc = 0;
- LASSERT (the_lnet.ln_refcount == 0);
+ if (requested_pid == LNET_PID_ANY) {
+ /* Don't instantiate LNET just for me */
+ return -ENETDOWN;
+ }
+
+ LASSERT(the_lnet.ln_refcount == 0);
- the_lnet.ln_routing = 0;
+ the_lnet.ln_routing = 0;
#ifdef __KERNEL__
- LASSERT ((requested_pid & LNET_PID_USERFLAG) == 0);
- the_lnet.ln_pid = requested_pid;
+ LASSERT((requested_pid & LNET_PID_USERFLAG) == 0);
+ the_lnet.ln_pid = requested_pid;
#else
- if (the_lnet.ln_server_mode_flag) {/* server case (uOSS) */
- LASSERT ((requested_pid & LNET_PID_USERFLAG) == 0);
-
- if (cfs_curproc_uid())/* Only root can run user-space server */
- return -EPERM;
- the_lnet.ln_pid = requested_pid;
-
- } else {/* client case (liblustre) */
-
- /* My PID must be unique on this node and flag I'm userspace */
- the_lnet.ln_pid = getpid() | LNET_PID_USERFLAG;
- }
+ if (the_lnet.ln_server_mode_flag) {/* server case (uOSS) */
+ LASSERT ((requested_pid & LNET_PID_USERFLAG) == 0);
+ /* Only root can run user-space server */
+ if (current_uid() != 0)
+ return -EPERM;
+ the_lnet.ln_pid = requested_pid;
+
+ } else {/* client case (liblustre) */
+ /* My PID must be unique on this node and flag I'm userspace */
+ the_lnet.ln_pid = getpid() | LNET_PID_USERFLAG;
+ }
#endif
- CFS_INIT_LIST_HEAD(&the_lnet.ln_test_peers);
- CFS_INIT_LIST_HEAD(&the_lnet.ln_nis);
- CFS_INIT_LIST_HEAD(&the_lnet.ln_zombie_nis);
- CFS_INIT_LIST_HEAD(&the_lnet.ln_remote_nets);
- CFS_INIT_LIST_HEAD(&the_lnet.ln_routers);
+ INIT_LIST_HEAD(&the_lnet.ln_test_peers);
+ INIT_LIST_HEAD(&the_lnet.ln_nis);
+ INIT_LIST_HEAD(&the_lnet.ln_nis_cpt);
+ INIT_LIST_HEAD(&the_lnet.ln_nis_zombie);
+ INIT_LIST_HEAD(&the_lnet.ln_routers);
+ INIT_LIST_HEAD(&the_lnet.ln_drop_rules);
+ INIT_LIST_HEAD(&the_lnet.ln_delay_rules);
+
+ rc = lnet_create_remote_nets_table();
+ if (rc != 0)
+ goto failed;
the_lnet.ln_interface_cookie = lnet_create_interface_cookie();
- LIBCFS_ALLOC(the_lnet.ln_counters, sizeof(lnet_counters_t));
+ the_lnet.ln_counters = cfs_percpt_alloc(lnet_cpt_table(),
+ sizeof(lnet_counters_t));
if (the_lnet.ln_counters == NULL) {
CERROR("Failed to allocate counters for LNet\n");
rc = -ENOMEM;
goto failed;
}
- rc = lnet_peer_table_create();
+ rc = lnet_peer_tables_create();
if (rc != 0)
goto failed;
- /* NB: we will have instance of message container per CPT soon */
- rc = lnet_msg_container_setup(&the_lnet.ln_msg_container);
+ rc = lnet_msg_containers_create();
if (rc != 0)
goto failed;
recs = lnet_res_containers_create(LNET_COOKIE_TYPE_ME, LNET_FL_MAX_MES,
sizeof(lnet_me_t));
- if (recs == NULL)
+ if (recs == NULL) {
+ rc = -ENOMEM;
goto failed;
+ }
the_lnet.ln_me_containers = recs;
- /* NB: we will have instance of MD container per CPT soon */
recs = lnet_res_containers_create(LNET_COOKIE_TYPE_MD, LNET_FL_MAX_MDS,
sizeof(lnet_libmd_t));
- if (recs == NULL)
+ if (recs == NULL) {
+ rc = -ENOMEM;
goto failed;
+ }
the_lnet.ln_md_containers = recs;
return rc;
}
-int
+static int
lnet_unprepare (void)
{
- /* NB no LNET_LOCK since this is the last reference. All LND instances
- * have shut down already, so it is safe to unlink and free all
- * descriptors, even those that appear committed to a network op (eg MD
- * with non-zero pending count) */
+ /* NB no LNET_LOCK since this is the last reference. All LND instances
+ * have shut down already, so it is safe to unlink and free all
+ * descriptors, even those that appear committed to a network op (eg MD
+ * with non-zero pending count) */
- lnet_fail_nid(LNET_NID_ANY, 0);
+ lnet_fail_nid(LNET_NID_ANY, 0);
- LASSERT (cfs_list_empty(&the_lnet.ln_test_peers));
- LASSERT (the_lnet.ln_refcount == 0);
- LASSERT (cfs_list_empty(&the_lnet.ln_nis));
- LASSERT (cfs_list_empty(&the_lnet.ln_zombie_nis));
- LASSERT (the_lnet.ln_nzombie_nis == 0);
+ LASSERT(the_lnet.ln_refcount == 0);
+ LASSERT(list_empty(&the_lnet.ln_test_peers));
+ LASSERT(list_empty(&the_lnet.ln_nis));
+ LASSERT(list_empty(&the_lnet.ln_nis_cpt));
+ LASSERT(list_empty(&the_lnet.ln_nis_zombie));
lnet_portals_destroy();
lnet_res_container_cleanup(&the_lnet.ln_eq_container);
- lnet_msg_container_cleanup(&the_lnet.ln_msg_container);
- lnet_peer_table_destroy();
- lnet_rtrpools_free();
+ lnet_msg_containers_destroy();
+ lnet_peer_tables_destroy();
+ lnet_rtrpools_free(0);
if (the_lnet.ln_counters != NULL) {
- LIBCFS_FREE(the_lnet.ln_counters, sizeof(lnet_counters_t));
+ cfs_percpt_free(the_lnet.ln_counters);
the_lnet.ln_counters = NULL;
}
+ lnet_destroy_remote_nets_table();
return 0;
}
lnet_ni_t *
-lnet_net2ni_locked (__u32 net)
+lnet_net2ni_locked(__u32 net, int cpt)
{
- cfs_list_t *tmp;
- lnet_ni_t *ni;
+ struct list_head *tmp;
+ lnet_ni_t *ni;
- cfs_list_for_each (tmp, &the_lnet.ln_nis) {
- ni = cfs_list_entry(tmp, lnet_ni_t, ni_list);
+ LASSERT(cpt != LNET_LOCK_EX);
- if (LNET_NIDNET(ni->ni_nid) == net) {
- lnet_ni_addref_locked(ni);
- return ni;
- }
- }
+ list_for_each(tmp, &the_lnet.ln_nis) {
+ ni = list_entry(tmp, lnet_ni_t, ni_list);
+
+ if (LNET_NIDNET(ni->ni_nid) == net) {
+ lnet_ni_addref_locked(ni, cpt);
+ return ni;
+ }
+ }
- return NULL;
+ return NULL;
+}
+
+lnet_ni_t *
+lnet_net2ni(__u32 net)
+{
+ lnet_ni_t *ni;
+
+ lnet_net_lock(0);
+ ni = lnet_net2ni_locked(net, 0);
+ lnet_net_unlock(0);
+
+ return ni;
}
+EXPORT_SYMBOL(lnet_net2ni);
-unsigned int
-lnet_nid_cpt_hash(lnet_nid_t nid)
+static unsigned int
+lnet_nid_cpt_hash(lnet_nid_t nid, unsigned int number)
{
__u64 key = nid;
unsigned int val;
- val = cfs_hash_long(key, LNET_CPT_BITS);
+ LASSERT(number >= 1 && number <= LNET_CPT_NUMBER);
+
+ if (number == 1)
+ return 0;
+
+ val = hash_long(key, LNET_CPT_BITS);
/* NB: LNET_CP_NUMBER doesn't have to be PO2 */
- if (val < LNET_CPT_NUMBER)
+ if (val < number)
return val;
- return (unsigned int)((key + val + (val >> 1)) % LNET_CPT_NUMBER);
+ return (unsigned int)(key + val + (val >> 1)) % number;
+}
+
+int
+lnet_cpt_of_nid_locked(lnet_nid_t nid)
+{
+ struct lnet_ni *ni;
+
+ /* must called with hold of lnet_net_lock */
+ if (LNET_CPT_NUMBER == 1)
+ return 0; /* the only one */
+
+ /* take lnet_net_lock(any) would be OK */
+ if (!list_empty(&the_lnet.ln_nis_cpt)) {
+ list_for_each_entry(ni, &the_lnet.ln_nis_cpt, ni_cptlist) {
+ if (LNET_NIDNET(ni->ni_nid) != LNET_NIDNET(nid))
+ continue;
+
+ LASSERT(ni->ni_cpts != NULL);
+ return ni->ni_cpts[lnet_nid_cpt_hash
+ (nid, ni->ni_ncpts)];
+ }
+ }
+
+ return lnet_nid_cpt_hash(nid, LNET_CPT_NUMBER);
}
int
lnet_cpt_of_nid(lnet_nid_t nid)
{
+ int cpt;
+ int cpt2;
+
if (LNET_CPT_NUMBER == 1)
return 0; /* the only one */
- return lnet_nid_cpt_hash(nid);
+ if (list_empty(&the_lnet.ln_nis_cpt))
+ return lnet_nid_cpt_hash(nid, LNET_CPT_NUMBER);
+
+ cpt = lnet_net_lock_current();
+ cpt2 = lnet_cpt_of_nid_locked(nid);
+ lnet_net_unlock(cpt);
+
+ return cpt2;
}
EXPORT_SYMBOL(lnet_cpt_of_nid);
int
-lnet_islocalnet (__u32 net)
+lnet_islocalnet(__u32 net)
{
- lnet_ni_t *ni;
+ struct lnet_ni *ni;
+ int cpt;
- LNET_LOCK();
- ni = lnet_net2ni_locked(net);
- if (ni != NULL)
- lnet_ni_decref_locked(ni);
- LNET_UNLOCK();
+ cpt = lnet_net_lock_current();
- return ni != NULL;
+ ni = lnet_net2ni_locked(net, cpt);
+ if (ni != NULL)
+ lnet_ni_decref_locked(ni, cpt);
+
+ lnet_net_unlock(cpt);
+
+ return ni != NULL;
}
lnet_ni_t *
-lnet_nid2ni_locked (lnet_nid_t nid)
+lnet_nid2ni_locked(lnet_nid_t nid, int cpt)
{
- cfs_list_t *tmp;
- lnet_ni_t *ni;
+ struct lnet_ni *ni;
+ struct list_head *tmp;
- cfs_list_for_each (tmp, &the_lnet.ln_nis) {
- ni = cfs_list_entry(tmp, lnet_ni_t, ni_list);
+ LASSERT(cpt != LNET_LOCK_EX);
- if (ni->ni_nid == nid) {
- lnet_ni_addref_locked(ni);
- return ni;
- }
- }
+ list_for_each(tmp, &the_lnet.ln_nis) {
+ ni = list_entry(tmp, lnet_ni_t, ni_list);
+
+ if (ni->ni_nid == nid) {
+ lnet_ni_addref_locked(ni, cpt);
+ return ni;
+ }
+ }
- return NULL;
+ return NULL;
}
int
-lnet_islocalnid (lnet_nid_t nid)
+lnet_islocalnid(lnet_nid_t nid)
{
- lnet_ni_t *ni;
+ struct lnet_ni *ni;
+ int cpt;
- LNET_LOCK();
- ni = lnet_nid2ni_locked(nid);
- if (ni != NULL)
- lnet_ni_decref_locked(ni);
- LNET_UNLOCK();
+ cpt = lnet_net_lock_current();
+ ni = lnet_nid2ni_locked(nid, cpt);
+ if (ni != NULL)
+ lnet_ni_decref_locked(ni, cpt);
+ lnet_net_unlock(cpt);
- return ni != NULL;
+ return ni != NULL;
}
int
lnet_count_acceptor_nis (void)
{
- /* Return the # of NIs that need the acceptor. */
- int count = 0;
+ /* Return the # of NIs that need the acceptor. */
+ int count = 0;
#if defined(__KERNEL__) || defined(HAVE_LIBPTHREAD)
- cfs_list_t *tmp;
- lnet_ni_t *ni;
+ struct list_head *tmp;
+ struct lnet_ni *ni;
+ int cpt;
- LNET_LOCK();
- cfs_list_for_each (tmp, &the_lnet.ln_nis) {
- ni = cfs_list_entry(tmp, lnet_ni_t, ni_list);
+ cpt = lnet_net_lock_current();
+ list_for_each(tmp, &the_lnet.ln_nis) {
+ ni = list_entry(tmp, lnet_ni_t, ni_list);
- if (ni->ni_lnd->lnd_accept != NULL)
- count++;
- }
+ if (ni->ni_lnd->lnd_accept != NULL)
+ count++;
+ }
- LNET_UNLOCK();
+ lnet_net_unlock(cpt);
#endif /* defined(__KERNEL__) || defined(HAVE_LIBPTHREAD) */
- return count;
+ return count;
}
-void
-lnet_shutdown_lndnis (void)
+static lnet_ping_info_t *
+lnet_ping_info_create(int num_ni)
{
- int i;
- int islo;
- lnet_ni_t *ni;
+ lnet_ping_info_t *ping_info;
+ unsigned int infosz;
- /* NB called holding the global mutex */
+ infosz = offsetof(lnet_ping_info_t, pi_ni[num_ni]);
+ LIBCFS_ALLOC(ping_info, infosz);
+ if (ping_info == NULL) {
+ CERROR("Can't allocate ping info[%d]\n", num_ni);
+ return NULL;
+ }
- /* All quiet on the API front */
- LASSERT (!the_lnet.ln_shutdown);
- LASSERT (the_lnet.ln_refcount == 0);
- LASSERT (cfs_list_empty(&the_lnet.ln_zombie_nis));
- LASSERT (the_lnet.ln_nzombie_nis == 0);
- LASSERT (cfs_list_empty(&the_lnet.ln_remote_nets));
+ ping_info->pi_nnis = num_ni;
+ ping_info->pi_pid = the_lnet.ln_pid;
+ ping_info->pi_magic = LNET_PROTO_PING_MAGIC;
+ ping_info->pi_features = LNET_PING_FEAT_NI_STATUS;
- LNET_LOCK();
- the_lnet.ln_shutdown = 1; /* flag shutdown */
+ return ping_info;
+}
- /* Unlink NIs from the global table */
- while (!cfs_list_empty(&the_lnet.ln_nis)) {
- ni = cfs_list_entry(the_lnet.ln_nis.next,
- lnet_ni_t, ni_list);
- cfs_list_del (&ni->ni_list);
+static inline int
+lnet_get_ni_count(void)
+{
+ struct lnet_ni *ni;
+ int count = 0;
- the_lnet.ln_nzombie_nis++;
- lnet_ni_decref_locked(ni); /* drop ln_nis' ref */
- }
+ lnet_net_lock(0);
- /* Drop the cached eqwait NI. */
- if (the_lnet.ln_eq_waitni != NULL) {
- lnet_ni_decref_locked(the_lnet.ln_eq_waitni);
- the_lnet.ln_eq_waitni = NULL;
- }
+ list_for_each_entry(ni, &the_lnet.ln_nis, ni_list)
+ count++;
- /* Drop the cached loopback NI. */
- if (the_lnet.ln_loni != NULL) {
- lnet_ni_decref_locked(the_lnet.ln_loni);
- the_lnet.ln_loni = NULL;
- }
+ lnet_net_unlock(0);
- LNET_UNLOCK();
+ return count;
+}
- /* Clear lazy portals and drop delayed messages which hold refs
- * on their lnet_msg_t::msg_rxpeer */
- for (i = 0; i < the_lnet.ln_nportals; i++)
- LNetClearLazyPortal(i);
+static inline void
+lnet_ping_info_free(lnet_ping_info_t *pinfo)
+{
+ LIBCFS_FREE(pinfo,
+ offsetof(lnet_ping_info_t,
+ pi_ni[pinfo->pi_nnis]));
+}
- /* Clear the peer table and wait for all peers to go (they hold refs on
- * their NIs) */
- lnet_peer_table_cleanup();
+static void
+lnet_ping_info_destroy(void)
+{
+ struct lnet_ni *ni;
- LNET_LOCK();
- /* Now wait for the NI's I just nuked to show up on ln_zombie_nis
- * and shut them down in guaranteed thread context */
- i = 2;
- while (the_lnet.ln_nzombie_nis != 0) {
+ lnet_net_lock(LNET_LOCK_EX);
- while (cfs_list_empty(&the_lnet.ln_zombie_nis)) {
- LNET_UNLOCK();
- ++i;
- if ((i & (-i)) == i)
- CDEBUG(D_WARNING,"Waiting for %d zombie NIs\n",
- the_lnet.ln_nzombie_nis);
- cfs_pause(cfs_time_seconds(1));
- LNET_LOCK();
- }
+ list_for_each_entry(ni, &the_lnet.ln_nis, ni_list) {
+ lnet_ni_lock(ni);
+ ni->ni_status = NULL;
+ lnet_ni_unlock(ni);
+ }
- ni = cfs_list_entry(the_lnet.ln_zombie_nis.next,
- lnet_ni_t, ni_list);
- cfs_list_del(&ni->ni_list);
- ni->ni_lnd->lnd_refcount--;
+ lnet_ping_info_free(the_lnet.ln_ping_info);
+ the_lnet.ln_ping_info = NULL;
- LNET_UNLOCK();
+ lnet_net_unlock(LNET_LOCK_EX);
+}
- islo = ni->ni_lnd->lnd_type == LOLND;
+static void
+lnet_ping_event_handler(lnet_event_t *event)
+{
+ lnet_ping_info_t *pinfo = event->md.user_ptr;
- LASSERT (!cfs_in_interrupt ());
- (ni->ni_lnd->lnd_shutdown)(ni);
+ if (event->unlinked)
+ pinfo->pi_features = LNET_PING_FEAT_INVAL;
+}
- /* can't deref lnd anymore now; it might have unregistered
- * itself... */
+static int
+lnet_ping_info_setup(lnet_ping_info_t **ppinfo, lnet_handle_md_t *md_handle,
+ int ni_count, bool set_eq)
+{
+ lnet_handle_me_t me_handle;
+ lnet_process_id_t id = {LNET_NID_ANY, LNET_PID_ANY};
+ lnet_md_t md = {NULL};
+ int rc, rc2;
+
+ if (set_eq) {
+ rc = LNetEQAlloc(0, lnet_ping_event_handler,
+ &the_lnet.ln_ping_target_eq);
+ if (rc != 0) {
+ CERROR("Can't allocate ping EQ: %d\n", rc);
+ return rc;
+ }
+ }
- if (!islo)
- CDEBUG(D_LNI, "Removed LNI %s\n",
- libcfs_nid2str(ni->ni_nid));
+ *ppinfo = lnet_ping_info_create(ni_count);
+ if (*ppinfo == NULL) {
+ rc = -ENOMEM;
+ goto failed_0;
+ }
- LIBCFS_FREE(ni, sizeof(*ni));
+ rc = LNetMEAttach(LNET_RESERVED_PORTAL, id,
+ LNET_PROTO_PING_MATCHBITS, 0,
+ LNET_UNLINK, LNET_INS_AFTER,
+ &me_handle);
+ if (rc != 0) {
+ CERROR("Can't create ping ME: %d\n", rc);
+ goto failed_1;
+ }
- LNET_LOCK();
- the_lnet.ln_nzombie_nis--;
- }
+ /* initialize md content */
+ md.start = *ppinfo;
+ md.length = offsetof(lnet_ping_info_t,
+ pi_ni[(*ppinfo)->pi_nnis]);
+ md.threshold = LNET_MD_THRESH_INF;
+ md.max_size = 0;
+ md.options = LNET_MD_OP_GET | LNET_MD_TRUNCATE |
+ LNET_MD_MANAGE_REMOTE;
+ md.user_ptr = NULL;
+ md.eq_handle = the_lnet.ln_ping_target_eq;
+ md.user_ptr = *ppinfo;
+
+ rc = LNetMDAttach(me_handle, md, LNET_RETAIN, md_handle);
+ if (rc != 0) {
+ CERROR("Can't attach ping MD: %d\n", rc);
+ goto failed_2;
+ }
- the_lnet.ln_shutdown = 0;
- LNET_UNLOCK();
+ return 0;
- if (the_lnet.ln_network_tokens != NULL) {
- LIBCFS_FREE(the_lnet.ln_network_tokens,
- the_lnet.ln_network_tokens_nob);
- the_lnet.ln_network_tokens = NULL;
- }
+failed_2:
+ rc2 = LNetMEUnlink(me_handle);
+ LASSERT(rc2 == 0);
+failed_1:
+ lnet_ping_info_free(*ppinfo);
+ *ppinfo = NULL;
+failed_0:
+ if (set_eq)
+ LNetEQFree(the_lnet.ln_ping_target_eq);
+ return rc;
}
-int
-lnet_startup_lndnis (void)
+static void
+lnet_ping_md_unlink(lnet_ping_info_t *pinfo, lnet_handle_md_t *md_handle)
{
- lnd_t *lnd;
- lnet_ni_t *ni;
- cfs_list_t nilist;
- int rc = 0;
- int lnd_type;
- int nicount = 0;
- char *nets = lnet_get_networks();
+ sigset_t blocked = cfs_block_allsigs();
- CFS_INIT_LIST_HEAD(&nilist);
+ LNetMDUnlink(*md_handle);
+ LNetInvalidateHandle(md_handle);
- if (nets == NULL)
- goto failed;
+ /* NB md could be busy; this just starts the unlink */
+ while (pinfo->pi_features != LNET_PING_FEAT_INVAL) {
+ CDEBUG(D_NET, "Still waiting for ping MD to unlink\n");
+ cfs_pause(cfs_time_seconds(1));
+ }
- rc = lnet_parse_networks(&nilist, nets);
- if (rc != 0)
- goto failed;
+ cfs_restore_sigs(blocked);
+}
- while (!cfs_list_empty(&nilist)) {
- ni = cfs_list_entry(nilist.next, lnet_ni_t, ni_list);
- lnd_type = LNET_NETTYP(LNET_NIDNET(ni->ni_nid));
+static void
+lnet_ping_info_install_locked(lnet_ping_info_t *ping_info)
+{
+ int i;
+ lnet_ni_t *ni;
+ lnet_ni_status_t *ns;
- LASSERT (libcfs_isknown_lnd(lnd_type));
+ i = 0;
+ list_for_each_entry(ni, &the_lnet.ln_nis, ni_list) {
+ LASSERT(i < ping_info->pi_nnis);
- if (lnd_type == CIBLND ||
- lnd_type == OPENIBLND ||
- lnd_type == IIBLND ||
- lnd_type == VIBLND) {
- CERROR("LND %s obsoleted\n",
- libcfs_lnd2str(lnd_type));
- goto failed;
- }
+ ns = &ping_info->pi_ni[i];
- LNET_MUTEX_LOCK(&the_lnet.ln_lnd_mutex);
- lnd = lnet_find_lnd_by_type(lnd_type);
+ ns->ns_nid = ni->ni_nid;
-#ifdef __KERNEL__
- if (lnd == NULL) {
- LNET_MUTEX_UNLOCK(&the_lnet.ln_lnd_mutex);
- rc = cfs_request_module("%s",
- libcfs_lnd2modname(lnd_type));
- LNET_MUTEX_LOCK(&the_lnet.ln_lnd_mutex);
-
- lnd = lnet_find_lnd_by_type(lnd_type);
- if (lnd == NULL) {
- LNET_MUTEX_UNLOCK(&the_lnet.ln_lnd_mutex);
- CERROR("Can't load LND %s, module %s, rc=%d\n",
- libcfs_lnd2str(lnd_type),
- libcfs_lnd2modname(lnd_type), rc);
-#ifndef HAVE_MODULE_LOADING_SUPPORT
- LCONSOLE_ERROR_MSG(0x104, "Your kernel must be "
- "compiled with kernel module "
- "loading support.");
-#endif
- goto failed;
- }
- }
-#else
- if (lnd == NULL) {
- LNET_MUTEX_UNLOCK(&the_lnet.ln_lnd_mutex);
- CERROR("LND %s not supported\n",
- libcfs_lnd2str(lnd_type));
- goto failed;
- }
-#endif
+ lnet_ni_lock(ni);
+ ns->ns_status = (ni->ni_status != NULL) ?
+ ni->ni_status->ns_status : LNET_NI_STATUS_UP;
+ ni->ni_status = ns;
+ lnet_ni_unlock(ni);
- ni->ni_refcount = 1;
+ i++;
+ }
+}
- LNET_LOCK();
- lnd->lnd_refcount++;
- LNET_UNLOCK();
+static void
+lnet_ping_target_update(lnet_ping_info_t *pinfo, lnet_handle_md_t md_handle)
+{
+ lnet_ping_info_t *old_pinfo = NULL;
+ lnet_handle_md_t old_md;
- ni->ni_lnd = lnd;
+ /* switch the NIs to point to the new ping info created */
+ lnet_net_lock(LNET_LOCK_EX);
- rc = (lnd->lnd_startup)(ni);
+ if (!the_lnet.ln_routing)
+ pinfo->pi_features |= LNET_PING_FEAT_RTE_DISABLED;
+ lnet_ping_info_install_locked(pinfo);
- LNET_MUTEX_UNLOCK(&the_lnet.ln_lnd_mutex);
+ if (the_lnet.ln_ping_info != NULL) {
+ old_pinfo = the_lnet.ln_ping_info;
+ old_md = the_lnet.ln_ping_target_md;
+ }
+ the_lnet.ln_ping_target_md = md_handle;
+ the_lnet.ln_ping_info = pinfo;
- if (rc != 0) {
- LCONSOLE_ERROR_MSG(0x105, "Error %d starting up LNI %s"
- "\n",
- rc, libcfs_lnd2str(lnd->lnd_type));
- LNET_LOCK();
- lnd->lnd_refcount--;
- LNET_UNLOCK();
- goto failed;
- }
+ lnet_net_unlock(LNET_LOCK_EX);
- LASSERT (ni->ni_peertimeout <= 0 || lnd->lnd_query != NULL);
+ if (old_pinfo != NULL) {
+ /* unlink the old ping info */
+ lnet_ping_md_unlink(old_pinfo, &old_md);
+ lnet_ping_info_free(old_pinfo);
+ }
+}
- cfs_list_del(&ni->ni_list);
+static void
+lnet_ping_target_fini(void)
+{
+ int rc;
- LNET_LOCK();
- cfs_list_add_tail(&ni->ni_list, &the_lnet.ln_nis);
- LNET_UNLOCK();
+ lnet_ping_md_unlink(the_lnet.ln_ping_info,
+ &the_lnet.ln_ping_target_md);
- if (lnd->lnd_type == LOLND) {
- lnet_ni_addref(ni);
- LASSERT (the_lnet.ln_loni == NULL);
- the_lnet.ln_loni = ni;
- continue;
- }
+ rc = LNetEQFree(the_lnet.ln_ping_target_eq);
+ LASSERT(rc == 0);
-#ifndef __KERNEL__
- if (lnd->lnd_wait != NULL) {
- if (the_lnet.ln_eq_waitni == NULL) {
- lnet_ni_addref(ni);
- the_lnet.ln_eq_waitni = ni;
- }
- } else {
-# ifndef HAVE_LIBPTHREAD
- LCONSOLE_ERROR_MSG(0x106, "LND %s not supported in a "
- "single-threaded runtime\n",
- libcfs_lnd2str(lnd_type));
- goto failed;
-# endif
- }
-#endif
- if (ni->ni_peertxcredits == 0 ||
- ni->ni_maxtxcredits == 0) {
- LCONSOLE_ERROR_MSG(0x107, "LNI %s has no %scredits\n",
- libcfs_lnd2str(lnd->lnd_type),
- ni->ni_peertxcredits == 0 ?
- "" : "per-peer ");
- goto failed;
- }
-
- ni->ni_txcredits = ni->ni_mintxcredits = ni->ni_maxtxcredits;
-
- CDEBUG(D_LNI, "Added LNI %s [%d/%d/%d/%d]\n",
- libcfs_nid2str(ni->ni_nid),
- ni->ni_peertxcredits, ni->ni_txcredits,
- ni->ni_peerrtrcredits, ni->ni_peertimeout);
-
- nicount++;
- }
+ lnet_ping_info_destroy();
+}
- if (the_lnet.ln_eq_waitni != NULL && nicount > 1) {
- lnd_type = the_lnet.ln_eq_waitni->ni_lnd->lnd_type;
- LCONSOLE_ERROR_MSG(0x109, "LND %s can only run single-network"
- "\n",
- libcfs_lnd2str(lnd_type));
- goto failed;
- }
+static int
+lnet_ni_tq_credits(lnet_ni_t *ni)
+{
+ int credits;
- return 0;
+ LASSERT(ni->ni_ncpts >= 1);
- failed:
- lnet_shutdown_lndnis();
+ if (ni->ni_ncpts == 1)
+ return ni->ni_maxtxcredits;
- while (!cfs_list_empty(&nilist)) {
- ni = cfs_list_entry(nilist.next, lnet_ni_t, ni_list);
- cfs_list_del(&ni->ni_list);
- LIBCFS_FREE(ni, sizeof(*ni));
- }
+ credits = ni->ni_maxtxcredits / ni->ni_ncpts;
+ credits = max(credits, 8 * ni->ni_peertxcredits);
+ credits = min(credits, ni->ni_maxtxcredits);
- return -ENETDOWN;
+ return credits;
}
-/**
- * Initialize LNet library.
- *
- * Only userspace program needs to call this function - it's automatically
- * called in the kernel at module loading time. Caller has to call LNetFini()
- * after a call to LNetInit(), if and only if the latter returned 0. It must
- * be called exactly once.
- *
- * \return 0 on success, and -ve on failures.
- */
-int
-LNetInit(void)
+static void
+lnet_ni_unlink_locked(lnet_ni_t *ni)
{
- int rc;
+ if (!list_empty(&ni->ni_cptlist)) {
+ list_del_init(&ni->ni_cptlist);
+ lnet_ni_decref_locked(ni, 0);
+ }
+
+ /* move it to zombie list and nobody can find it anymore */
+ LASSERT(!list_empty(&ni->ni_list));
+ list_move(&ni->ni_list, &the_lnet.ln_nis_zombie);
+ lnet_ni_decref_locked(ni, 0); /* drop ln_nis' ref */
+}
- lnet_assert_wire_constants ();
- LASSERT (!the_lnet.ln_init);
+static void
+lnet_clear_zombies_nis_locked(void)
+{
+ int i;
+ int islo;
+ lnet_ni_t *ni;
+
+ /* Now wait for the NI's I just nuked to show up on ln_zombie_nis
+ * and shut them down in guaranteed thread context */
+ i = 2;
+ while (!list_empty(&the_lnet.ln_nis_zombie)) {
+ int *ref;
+ int j;
+
+ ni = list_entry(the_lnet.ln_nis_zombie.next,
+ lnet_ni_t, ni_list);
+ list_del_init(&ni->ni_list);
+ cfs_percpt_for_each(ref, j, ni->ni_refs) {
+ if (*ref == 0)
+ continue;
+ /* still busy, add it back to zombie list */
+ list_add(&ni->ni_list, &the_lnet.ln_nis_zombie);
+ break;
+ }
- memset(&the_lnet, 0, sizeof(the_lnet));
+ if (!list_empty(&ni->ni_list)) {
+ lnet_net_unlock(LNET_LOCK_EX);
+ ++i;
+ if ((i & (-i)) == i) {
+ CDEBUG(D_WARNING,
+ "Waiting for zombie LNI %s\n",
+ libcfs_nid2str(ni->ni_nid));
+ }
+ cfs_pause(cfs_time_seconds(1));
+ lnet_net_lock(LNET_LOCK_EX);
+ continue;
+ }
- /* refer to global cfs_cpt_table for now */
- the_lnet.ln_cpt_table = cfs_cpt_table;
- the_lnet.ln_cpt_number = cfs_cpt_number(cfs_cpt_table);
+ ni->ni_lnd->lnd_refcount--;
+ lnet_net_unlock(LNET_LOCK_EX);
- LASSERT(the_lnet.ln_cpt_number > 0);
- if (the_lnet.ln_cpt_number > LNET_CPT_MAX) {
- /* we are under risk of consuming all lh_cookie */
- CERROR("Can't have %d CPTs for LNet (max allowed is %d), "
- "please change setting of CPT-table and retry\n",
- the_lnet.ln_cpt_number, LNET_CPT_MAX);
- return -1;
- }
+ islo = ni->ni_lnd->lnd_type == LOLND;
- while ((1 << the_lnet.ln_cpt_bits) < the_lnet.ln_cpt_number)
- the_lnet.ln_cpt_bits++;
+ LASSERT(!in_interrupt());
+ (ni->ni_lnd->lnd_shutdown)(ni);
- rc = lnet_create_locks();
- if (rc != 0) {
- CERROR("Can't create LNet global locks: %d\n", rc);
- return -1;
- }
+ /* can't deref lnd anymore now; it might have unregistered
+ * itself... */
- the_lnet.ln_refcount = 0;
- the_lnet.ln_init = 1;
- LNetInvalidateHandle(&the_lnet.ln_rc_eqh);
- CFS_INIT_LIST_HEAD(&the_lnet.ln_lnds);
- CFS_INIT_LIST_HEAD(&the_lnet.ln_rcd_zombie);
- CFS_INIT_LIST_HEAD(&the_lnet.ln_rcd_deathrow);
+ if (!islo)
+ CDEBUG(D_LNI, "Removed LNI %s\n",
+ libcfs_nid2str(ni->ni_nid));
-#ifdef __KERNEL__
- /* All LNDs apart from the LOLND are in separate modules. They
- * register themselves when their module loads, and unregister
- * themselves when their module is unloaded. */
-#else
- /* Register LNDs
- * NB the order here determines default 'networks=' order */
-# ifdef CRAY_XT3
- LNET_REGISTER_ULND(the_ptllnd);
-# endif
-# ifdef HAVE_LIBPTHREAD
- LNET_REGISTER_ULND(the_tcplnd);
-# endif
-#endif
- lnet_register_lnd(&the_lolnd);
- return 0;
+ lnet_ni_free(ni);
+ i = 2;
+ lnet_net_lock(LNET_LOCK_EX);
+ }
}
+static void
+lnet_shutdown_lndnis(void)
+{
+ int i;
+ lnet_ni_t *ni;
+
+ /* NB called holding the global mutex */
+
+ /* All quiet on the API front */
+ LASSERT(!the_lnet.ln_shutdown);
+ LASSERT(the_lnet.ln_refcount == 0);
+ LASSERT(list_empty(&the_lnet.ln_nis_zombie));
+
+ lnet_net_lock(LNET_LOCK_EX);
+ the_lnet.ln_shutdown = 1; /* flag shutdown */
+
+ /* Unlink NIs from the global table */
+ while (!list_empty(&the_lnet.ln_nis)) {
+ ni = list_entry(the_lnet.ln_nis.next,
+ lnet_ni_t, ni_list);
+ lnet_ni_unlink_locked(ni);
+ }
+
+ /* Drop the cached eqwait NI. */
+ if (the_lnet.ln_eq_waitni != NULL) {
+ lnet_ni_decref_locked(the_lnet.ln_eq_waitni, 0);
+ the_lnet.ln_eq_waitni = NULL;
+ }
+
+ /* Drop the cached loopback NI. */
+ if (the_lnet.ln_loni != NULL) {
+ lnet_ni_decref_locked(the_lnet.ln_loni, 0);
+ the_lnet.ln_loni = NULL;
+ }
+
+ lnet_net_unlock(LNET_LOCK_EX);
+
+ /* Clear lazy portals and drop delayed messages which hold refs
+ * on their lnet_msg_t::msg_rxpeer */
+ for (i = 0; i < the_lnet.ln_nportals; i++)
+ LNetClearLazyPortal(i);
+
+ /* Clear the peer table and wait for all peers to go (they hold refs on
+ * their NIs) */
+ lnet_peer_tables_cleanup(NULL);
+
+ lnet_net_lock(LNET_LOCK_EX);
+
+ lnet_clear_zombies_nis_locked();
+ the_lnet.ln_shutdown = 0;
+ lnet_net_unlock(LNET_LOCK_EX);
+}
+
+/* shutdown down the NI and release refcount */
+static void
+lnet_shutdown_lndni(struct lnet_ni *ni)
+{
+ lnet_net_lock(LNET_LOCK_EX);
+ lnet_ni_unlink_locked(ni);
+ lnet_net_unlock(LNET_LOCK_EX);
+
+ /* Do peer table cleanup for this ni */
+ lnet_peer_tables_cleanup(ni);
+
+ lnet_net_lock(LNET_LOCK_EX);
+ lnet_clear_zombies_nis_locked();
+ lnet_net_unlock(LNET_LOCK_EX);
+}
+
+static int
+lnet_startup_lndni(struct lnet_ni *ni, __s32 peer_timeout,
+ __s32 peer_cr, __s32 peer_buf_cr, __s32 credits)
+{
+ int rc = -EINVAL;
+ int lnd_type;
+ lnd_t *lnd;
+ struct lnet_tx_queue *tq;
+ int i;
+
+ lnd_type = LNET_NETTYP(LNET_NIDNET(ni->ni_nid));
+
+ LASSERT(libcfs_isknown_lnd(lnd_type));
+
+ if (lnd_type == CIBLND || lnd_type == OPENIBLND ||
+ lnd_type == IIBLND || lnd_type == VIBLND) {
+ CERROR("LND %s obsoleted\n", libcfs_lnd2str(lnd_type));
+ goto failed0;
+ }
+
+ /* Make sure this new NI is unique. */
+ lnet_net_lock(LNET_LOCK_EX);
+ rc = lnet_net_unique(LNET_NIDNET(ni->ni_nid), &the_lnet.ln_nis);
+ lnet_net_unlock(LNET_LOCK_EX);
+
+ if (!rc) {
+ if (lnd_type == LOLND) {
+ lnet_ni_free(ni);
+ return 0;
+ }
+
+ CERROR("Net %s is not unique\n",
+ libcfs_net2str(LNET_NIDNET(ni->ni_nid)));
+
+ rc = -EEXIST;
+ goto failed0;
+ }
+
+ LNET_MUTEX_LOCK(&the_lnet.ln_lnd_mutex);
+ lnd = lnet_find_lnd_by_type(lnd_type);
+
+#ifdef __KERNEL__
+ if (lnd == NULL) {
+ LNET_MUTEX_UNLOCK(&the_lnet.ln_lnd_mutex);
+ rc = request_module("%s", libcfs_lnd2modname(lnd_type));
+ LNET_MUTEX_LOCK(&the_lnet.ln_lnd_mutex);
+
+ lnd = lnet_find_lnd_by_type(lnd_type);
+ if (lnd == NULL) {
+ LNET_MUTEX_UNLOCK(&the_lnet.ln_lnd_mutex);
+ CERROR("Can't load LND %s, module %s, rc=%d\n",
+ libcfs_lnd2str(lnd_type),
+ libcfs_lnd2modname(lnd_type), rc);
+#ifndef HAVE_MODULE_LOADING_SUPPORT
+ LCONSOLE_ERROR_MSG(0x104, "Your kernel must be "
+ "compiled with kernel module "
+ "loading support.");
+#endif
+ rc = -EINVAL;
+ goto failed0;
+ }
+ }
+#else
+ if (lnd == NULL) {
+ LNET_MUTEX_UNLOCK(&the_lnet.ln_lnd_mutex);
+ CERROR("LND %s not supported\n",
+ libcfs_lnd2str(lnd_type));
+ goto failed0;
+ }
+#endif
+
+ lnet_net_lock(LNET_LOCK_EX);
+ lnd->lnd_refcount++;
+ lnet_net_unlock(LNET_LOCK_EX);
+
+ ni->ni_lnd = lnd;
+
+ rc = (lnd->lnd_startup)(ni);
+
+ LNET_MUTEX_UNLOCK(&the_lnet.ln_lnd_mutex);
+
+ if (rc != 0) {
+ LCONSOLE_ERROR_MSG(0x105, "Error %d starting up LNI %s\n",
+ rc, libcfs_lnd2str(lnd->lnd_type));
+ lnet_net_lock(LNET_LOCK_EX);
+ lnd->lnd_refcount--;
+ lnet_net_unlock(LNET_LOCK_EX);
+ goto failed0;
+ }
+
+ /* If given some LND tunable parameters, parse those now to
+ * override the values in the NI structure. */
+ if (peer_buf_cr >= 0)
+ ni->ni_peerrtrcredits = peer_buf_cr;
+ if (peer_timeout >= 0)
+ ni->ni_peertimeout = peer_timeout;
+ /*
+ * TODO
+ * Note: For now, don't allow the user to change
+ * peertxcredits as this number is used in the
+ * IB LND to control queue depth.
+ * if (peer_cr != -1)
+ * ni->ni_peertxcredits = peer_cr;
+ */
+ if (credits >= 0)
+ ni->ni_maxtxcredits = credits;
+
+ LASSERT(ni->ni_peertimeout <= 0 || lnd->lnd_query != NULL);
+
+ lnet_net_lock(LNET_LOCK_EX);
+ /* refcount for ln_nis */
+ lnet_ni_addref_locked(ni, 0);
+ list_add_tail(&ni->ni_list, &the_lnet.ln_nis);
+ if (ni->ni_cpts != NULL) {
+ lnet_ni_addref_locked(ni, 0);
+ list_add_tail(&ni->ni_cptlist, &the_lnet.ln_nis_cpt);
+ }
+
+ lnet_net_unlock(LNET_LOCK_EX);
+
+ if (lnd->lnd_type == LOLND) {
+ lnet_ni_addref(ni);
+ LASSERT(the_lnet.ln_loni == NULL);
+ the_lnet.ln_loni = ni;
+ return 0;
+ }
+
+#ifndef __KERNEL__
+ if (lnd->lnd_wait != NULL) {
+ if (the_lnet.ln_eq_waitni == NULL) {
+ lnet_ni_addref(ni);
+ the_lnet.ln_eq_waitni = ni;
+ }
+ } else {
+# ifndef HAVE_LIBPTHREAD
+ LCONSOLE_ERROR_MSG(0x106, "LND %s not supported in a "
+ "single-threaded runtime\n",
+ libcfs_lnd2str(lnd_type));
+ /* shutdown the NI since if we get here then it must've already
+ * been started
+ */
+ lnet_shutdown_lndni(ni);
+ return -EINVAL;
+# endif
+ }
+#endif
+ if (ni->ni_peertxcredits == 0 || ni->ni_maxtxcredits == 0) {
+ LCONSOLE_ERROR_MSG(0x107, "LNI %s has no %scredits\n",
+ libcfs_lnd2str(lnd->lnd_type),
+ ni->ni_peertxcredits == 0 ?
+ "" : "per-peer ");
+ /* shutdown the NI since if we get here then it must've already
+ * been started
+ */
+ lnet_shutdown_lndni(ni);
+ return -EINVAL;
+ }
+
+ cfs_percpt_for_each(tq, i, ni->ni_tx_queues) {
+ tq->tq_credits_min =
+ tq->tq_credits_max =
+ tq->tq_credits = lnet_ni_tq_credits(ni);
+ }
+
+ CDEBUG(D_LNI, "Added LNI %s [%d/%d/%d/%d]\n",
+ libcfs_nid2str(ni->ni_nid), ni->ni_peertxcredits,
+ lnet_ni_tq_credits(ni) * LNET_CPT_NUMBER,
+ ni->ni_peerrtrcredits, ni->ni_peertimeout);
+
+ return 0;
+failed0:
+ lnet_ni_free(ni);
+ return rc;
+}
+
+static int
+lnet_startup_lndnis(struct list_head *nilist)
+{
+ struct lnet_ni *ni;
+ int rc;
+ int lnd_type;
+ int ni_count = 0;
+
+ while (!list_empty(nilist)) {
+ ni = list_entry(nilist->next, lnet_ni_t, ni_list);
+ list_del(&ni->ni_list);
+ rc = lnet_startup_lndni(ni, -1, -1, -1, -1);
+
+ if (rc < 0)
+ goto failed;
+
+ ni_count++;
+ }
+
+ if (the_lnet.ln_eq_waitni != NULL && ni_count > 1) {
+ lnd_type = the_lnet.ln_eq_waitni->ni_lnd->lnd_type;
+ LCONSOLE_ERROR_MSG(0x109, "LND %s can only run single-network"
+ "\n",
+ libcfs_lnd2str(lnd_type));
+ rc = -EINVAL;
+ goto failed;
+ }
+
+ return ni_count;
+failed:
+ lnet_shutdown_lndnis();
+
+ return rc;
+}
+
+/**
+ * Initialize LNet library.
+ *
+ * Only userspace program needs to call this function - it's automatically
+ * called in the kernel at module loading time. Caller has to call LNetFini()
+ * after a call to LNetInit(), if and only if the latter returned 0. It must
+ * be called exactly once.
+ *
+ * \return 0 on success, and -ve on failures.
+ */
+int
+LNetInit(void)
+{
+ int rc;
+
+ lnet_assert_wire_constants();
+ LASSERT(!the_lnet.ln_init);
+
+ memset(&the_lnet, 0, sizeof(the_lnet));
+
+ /* refer to global cfs_cpt_table for now */
+ the_lnet.ln_cpt_table = cfs_cpt_table;
+ the_lnet.ln_cpt_number = cfs_cpt_number(cfs_cpt_table);
+
+ LASSERT(the_lnet.ln_cpt_number > 0);
+ if (the_lnet.ln_cpt_number > LNET_CPT_MAX) {
+ /* we are under risk of consuming all lh_cookie */
+ CERROR("Can't have %d CPTs for LNet (max allowed is %d), "
+ "please change setting of CPT-table and retry\n",
+ the_lnet.ln_cpt_number, LNET_CPT_MAX);
+ return -1;
+ }
+
+ while ((1 << the_lnet.ln_cpt_bits) < the_lnet.ln_cpt_number)
+ the_lnet.ln_cpt_bits++;
+
+ rc = lnet_create_locks();
+ if (rc != 0) {
+ CERROR("Can't create LNet global locks: %d\n", rc);
+ return -1;
+ }
+
+ the_lnet.ln_refcount = 0;
+ the_lnet.ln_init = 1;
+ LNetInvalidateHandle(&the_lnet.ln_rc_eqh);
+ INIT_LIST_HEAD(&the_lnet.ln_lnds);
+ INIT_LIST_HEAD(&the_lnet.ln_rcd_zombie);
+ INIT_LIST_HEAD(&the_lnet.ln_rcd_deathrow);
+
+#ifdef __KERNEL__
+ /* The hash table size is the number of bits it takes to express the set
+ * ln_num_routes, minus 1 (better to under estimate than over so we
+ * don't waste memory). */
+ if (rnet_htable_size <= 0)
+ rnet_htable_size = LNET_REMOTE_NETS_HASH_DEFAULT;
+ else if (rnet_htable_size > LNET_REMOTE_NETS_HASH_MAX)
+ rnet_htable_size = LNET_REMOTE_NETS_HASH_MAX;
+ the_lnet.ln_remote_nets_hbits = max_t(int, 1,
+ order_base_2(rnet_htable_size) - 1);
+
+ /* All LNDs apart from the LOLND are in separate modules. They
+ * register themselves when their module loads, and unregister
+ * themselves when their module is unloaded. */
+#else
+ the_lnet.ln_remote_nets_hbits = 8;
+
+ /* Register LNDs
+ * NB the order here determines default 'networks=' order */
+# ifdef HAVE_LIBPTHREAD
+ LNET_REGISTER_ULND(the_tcplnd);
+# endif
+#endif
+ lnet_register_lnd(&the_lolnd);
+ return 0;
+}
+EXPORT_SYMBOL(LNetInit);
+
/**
* Finalize LNet library.
*
LASSERT(the_lnet.ln_init);
LASSERT(the_lnet.ln_refcount == 0);
- while (!cfs_list_empty(&the_lnet.ln_lnds))
- lnet_unregister_lnd(cfs_list_entry(the_lnet.ln_lnds.next,
- lnd_t, lnd_list));
+ while (!list_empty(&the_lnet.ln_lnds))
+ lnet_unregister_lnd(list_entry(the_lnet.ln_lnds.next,
+ lnd_t, lnd_list));
lnet_destroy_locks();
the_lnet.ln_init = 0;
}
+EXPORT_SYMBOL(LNetFini);
/**
* Set LNet PID and start LNet interfaces, routing, and forwarding.
int
LNetNIInit(lnet_pid_t requested_pid)
{
- int im_a_router = 0;
- int rc;
+ int im_a_router = 0;
+ int rc;
+ int ni_count;
+ lnet_ping_info_t *pinfo;
+ lnet_handle_md_t md_handle;
+ struct list_head net_head;
- LNET_MUTEX_LOCK(&the_lnet.ln_api_mutex);
+ INIT_LIST_HEAD(&net_head);
- LASSERT (the_lnet.ln_init);
- CDEBUG(D_OTHER, "refs %d\n", the_lnet.ln_refcount);
+ LNET_MUTEX_LOCK(&the_lnet.ln_api_mutex);
- if (the_lnet.ln_refcount > 0) {
- rc = the_lnet.ln_refcount++;
- goto out;
- }
+ LASSERT(the_lnet.ln_init);
+ CDEBUG(D_OTHER, "refs %d\n", the_lnet.ln_refcount);
- lnet_get_tunables();
+ if (the_lnet.ln_refcount > 0) {
+ rc = the_lnet.ln_refcount++;
+ LNET_MUTEX_UNLOCK(&the_lnet.ln_api_mutex);
+ return rc;
+ }
- if (requested_pid == LNET_PID_ANY) {
- /* Don't instantiate LNET just for me */
- rc = -ENETDOWN;
- goto failed0;
- }
+ rc = lnet_prepare(requested_pid);
+ if (rc != 0) {
+ LNET_MUTEX_UNLOCK(&the_lnet.ln_api_mutex);
+ return rc;
+ }
- rc = lnet_prepare(requested_pid);
- if (rc != 0)
- goto failed0;
-
- rc = lnet_startup_lndnis();
- if (rc != 0)
- goto failed1;
-
- rc = lnet_parse_routes(lnet_get_routes(), &im_a_router);
- if (rc != 0)
- goto failed2;
-
- rc = lnet_check_routes();
- if (rc != 0)
- goto failed2;
-
- rc = lnet_rtrpools_alloc(im_a_router);
- if (rc != 0)
- goto failed2;
-
- rc = lnet_acceptor_start();
- if (rc != 0)
- goto failed2;
-
- the_lnet.ln_refcount = 1;
- /* Now I may use my own API functions... */
-
- /* NB router checker needs the_lnet.ln_ping_info in
- * lnet_router_checker -> lnet_update_ni_status_locked */
- rc = lnet_ping_target_init();
- if (rc != 0)
- goto failed3;
-
- rc = lnet_router_checker_start();
- if (rc != 0)
- goto failed4;
-
- lnet_proc_init();
- goto out;
-
- failed4:
- lnet_ping_target_fini();
- failed3:
- the_lnet.ln_refcount = 0;
- lnet_acceptor_stop();
- failed2:
- lnet_destroy_routes();
- lnet_shutdown_lndnis();
- failed1:
- lnet_unprepare();
- failed0:
- LASSERT (rc < 0);
- out:
- LNET_MUTEX_UNLOCK(&the_lnet.ln_api_mutex);
- return rc;
+ /* Add in the loopback network */
+ if (lnet_ni_alloc(LNET_MKNET(LOLND, 0), NULL, &net_head) == NULL) {
+ rc = -ENOMEM;
+ goto failed0;
+ }
+
+ /* If LNet is being initialized via DLC it is possible
+ * that the user requests not to load module parameters (ones which
+ * are supported by DLC) on initialization. Therefore, make sure not
+ * to load networks, routes and forwarding from module parameters
+ * in this case. On cleanup in case of failure only clean up
+ * routes if it has been loaded */
+ if (!the_lnet.ln_nis_from_mod_params) {
+ rc = lnet_parse_networks(&net_head,
+ lnet_get_networks());
+ if (rc < 0)
+ goto failed0;
+ }
+
+ ni_count = lnet_startup_lndnis(&net_head);
+ if (ni_count < 0) {
+ rc = ni_count;
+ goto failed0;
+ }
+
+ if (!the_lnet.ln_nis_from_mod_params) {
+ rc = lnet_parse_routes(lnet_get_routes(), &im_a_router);
+ if (rc != 0)
+ goto failed1;
+
+ rc = lnet_check_routes();
+ if (rc != 0)
+ goto failed2;
+
+ rc = lnet_rtrpools_alloc(im_a_router);
+ if (rc != 0)
+ goto failed2;
+ }
+
+ rc = lnet_acceptor_start();
+ if (rc != 0)
+ goto failed2;
+ the_lnet.ln_refcount = 1;
+ /* Now I may use my own API functions... */
+
+ rc = lnet_ping_info_setup(&pinfo, &md_handle, ni_count, true);
+ if (rc != 0)
+ goto failed3;
+
+ lnet_ping_target_update(pinfo, md_handle);
+
+ rc = lnet_router_checker_start();
+ if (rc != 0)
+ goto failed4;
+
+ lnet_fault_init();
+ lnet_proc_init();
+
+ LNET_MUTEX_UNLOCK(&the_lnet.ln_api_mutex);
+
+ return 0;
+
+failed4:
+ lnet_ping_target_fini();
+failed3:
+ the_lnet.ln_refcount = 0;
+ lnet_acceptor_stop();
+failed2:
+ if (!the_lnet.ln_nis_from_mod_params)
+ lnet_destroy_routes();
+failed1:
+ lnet_shutdown_lndnis();
+failed0:
+ lnet_unprepare();
+ LASSERT(rc < 0);
+ LNET_MUTEX_UNLOCK(&the_lnet.ln_api_mutex);
+ while (!list_empty(&net_head)) {
+ struct lnet_ni *ni;
+ ni = list_entry(net_head.next, struct lnet_ni, ni_list);
+ list_del_init(&ni->ni_list);
+ lnet_ni_free(ni);
+ }
+ return rc;
}
+EXPORT_SYMBOL(LNetNIInit);
/**
* Stop LNet interfaces, routing, and forwarding.
if (the_lnet.ln_refcount != 1) {
the_lnet.ln_refcount--;
} else {
- LASSERT (!the_lnet.ln_niinit_self);
+ LASSERT(!the_lnet.ln_niinit_self);
+
+ lnet_fault_fini();
lnet_proc_fini();
lnet_router_checker_stop();
LNET_MUTEX_UNLOCK(&the_lnet.ln_api_mutex);
return 0;
}
+EXPORT_SYMBOL(LNetNIFini);
+
+/**
+ * Grabs the ni data from the ni structure and fills the out
+ * parameters
+ *
+ * \param[in] ni network interface structure
+ * \param[out] cpt_count the number of cpts the ni is on
+ * \param[out] nid Network Interface ID
+ * \param[out] peer_timeout NI peer timeout
+ * \param[out] peer_tx_crdits NI peer transmit credits
+ * \param[out] peer_rtr_credits NI peer router credits
+ * \param[out] max_tx_credits NI max transmit credit
+ * \param[out] net_config Network configuration
+ */
+static void
+lnet_fill_ni_info(struct lnet_ni *ni, __u32 *cpt_count, __u64 *nid,
+ int *peer_timeout, int *peer_tx_credits,
+ int *peer_rtr_credits, int *max_tx_credits,
+ struct lnet_ioctl_net_config *net_config)
+{
+ int i;
+
+ if (ni == NULL)
+ return;
+
+ if (net_config == NULL)
+ return;
+
+ CLASSERT(ARRAY_SIZE(ni->ni_interfaces) ==
+ ARRAY_SIZE(net_config->ni_interfaces));
+
+ if (ni->ni_interfaces[0] != NULL) {
+ for (i = 0; i < ARRAY_SIZE(ni->ni_interfaces); i++) {
+ if (ni->ni_interfaces[i] != NULL) {
+ strncpy(net_config->ni_interfaces[i],
+ ni->ni_interfaces[i],
+ sizeof(net_config->ni_interfaces[i]));
+ }
+ }
+ }
+
+ *nid = ni->ni_nid;
+ *peer_timeout = ni->ni_peertimeout;
+ *peer_tx_credits = ni->ni_peertxcredits;
+ *peer_rtr_credits = ni->ni_peerrtrcredits;
+ *max_tx_credits = ni->ni_maxtxcredits;
+
+ net_config->ni_status = ni->ni_status->ns_status;
+
+ for (i = 0;
+ ni->ni_cpts != NULL && i < ni->ni_ncpts &&
+ i < LNET_MAX_SHOW_NUM_CPT;
+ i++)
+ net_config->ni_cpts[i] = ni->ni_cpts[i];
+
+ *cpt_count = ni->ni_ncpts;
+}
+
+int
+lnet_get_net_config(int idx, __u32 *cpt_count, __u64 *nid, int *peer_timeout,
+ int *peer_tx_credits, int *peer_rtr_credits,
+ int *max_tx_credits,
+ struct lnet_ioctl_net_config *net_config)
+{
+ struct lnet_ni *ni;
+ struct list_head *tmp;
+ int cpt;
+ int rc = -ENOENT;
+
+ cpt = lnet_net_lock_current();
+
+ list_for_each(tmp, &the_lnet.ln_nis) {
+ ni = list_entry(tmp, lnet_ni_t, ni_list);
+ if (idx-- == 0) {
+ rc = 0;
+ lnet_ni_lock(ni);
+ lnet_fill_ni_info(ni, cpt_count, nid, peer_timeout,
+ peer_tx_credits, peer_rtr_credits,
+ max_tx_credits, net_config);
+ lnet_ni_unlock(ni);
+ break;
+ }
+ }
+
+ lnet_net_unlock(cpt);
+ return rc;
+}
+
+int
+lnet_dyn_add_ni(lnet_pid_t requested_pid, char *nets,
+ __s32 peer_timeout, __s32 peer_cr, __s32 peer_buf_cr,
+ __s32 credits)
+{
+ lnet_ping_info_t *pinfo;
+ lnet_handle_md_t md_handle;
+ struct lnet_ni *ni;
+ struct list_head net_head;
+ int rc;
+ lnet_remotenet_t *rnet;
+
+ INIT_LIST_HEAD(&net_head);
+
+ /* Create a ni structure for the network string */
+ rc = lnet_parse_networks(&net_head, nets);
+ if (rc <= 0)
+ return rc == 0 ? -EINVAL : rc;
+
+ LNET_MUTEX_LOCK(&the_lnet.ln_api_mutex);
+
+ if (rc > 1) {
+ rc = -EINVAL; /* only add one interface per call */
+ goto failed0;
+ }
+
+ ni = list_entry(net_head.next, struct lnet_ni, ni_list);
+
+ lnet_net_lock(LNET_LOCK_EX);
+ rnet = lnet_find_net_locked(LNET_NIDNET(ni->ni_nid));
+ lnet_net_unlock(LNET_LOCK_EX);
+ /* make sure that the net added doesn't invalidate the current
+ * configuration LNet is keeping */
+ if (rnet != NULL) {
+ CERROR("Adding net %s will invalidate routing configuration\n",
+ nets);
+ rc = -EUSERS;
+ goto failed0;
+ }
+
+ rc = lnet_ping_info_setup(&pinfo, &md_handle, 1 + lnet_get_ni_count(),
+ false);
+ if (rc != 0)
+ goto failed0;
+
+ list_del_init(&ni->ni_list);
+
+ rc = lnet_startup_lndni(ni, peer_timeout, peer_cr,
+ peer_buf_cr, credits);
+ if (rc != 0)
+ goto failed1;
+
+ if (ni->ni_lnd->lnd_accept != NULL) {
+ rc = lnet_acceptor_start();
+ if (rc < 0) {
+ /* shutdown the ni that we just started */
+ CERROR("Failed to start up acceptor thread\n");
+ lnet_shutdown_lndni(ni);
+ goto failed1;
+ }
+ }
+
+ lnet_ping_target_update(pinfo, md_handle);
+ LNET_MUTEX_UNLOCK(&the_lnet.ln_api_mutex);
+
+ return 0;
+
+failed1:
+ lnet_ping_md_unlink(pinfo, &md_handle);
+ lnet_ping_info_free(pinfo);
+failed0:
+ LNET_MUTEX_UNLOCK(&the_lnet.ln_api_mutex);
+ while (!list_empty(&net_head)) {
+ ni = list_entry(net_head.next, struct lnet_ni, ni_list);
+ list_del_init(&ni->ni_list);
+ lnet_ni_free(ni);
+ }
+ return rc;
+}
+
+int
+lnet_dyn_del_ni(__u32 net)
+{
+ lnet_ni_t *ni;
+ lnet_ping_info_t *pinfo;
+ lnet_handle_md_t md_handle;
+ int rc;
+
+ /* don't allow userspace to shutdown the LOLND */
+ if (LNET_NETTYP(net) == LOLND)
+ return -EINVAL;
+
+ LNET_MUTEX_LOCK(&the_lnet.ln_api_mutex);
+ /* create and link a new ping info, before removing the old one */
+ rc = lnet_ping_info_setup(&pinfo, &md_handle,
+ lnet_get_ni_count() - 1, false);
+ if (rc != 0)
+ goto out;
+
+ ni = lnet_net2ni(net);
+ if (ni == NULL) {
+ rc = -EINVAL;
+ goto failed;
+ }
+
+ /* decrement the reference counter taken by lnet_net2ni() */
+ lnet_ni_decref_locked(ni, 0);
+
+ lnet_shutdown_lndni(ni);
+
+ if (lnet_count_acceptor_nis() == 0)
+ lnet_acceptor_stop();
+
+ lnet_ping_target_update(pinfo, md_handle);
+ goto out;
+failed:
+ lnet_ping_md_unlink(pinfo, &md_handle);
+ lnet_ping_info_free(pinfo);
+out:
+ LNET_MUTEX_UNLOCK(&the_lnet.ln_api_mutex);
+
+ return rc;
+}
/**
* This is an ugly hack to export IOC_LIBCFS_DEBUG_PEER and
int
LNetCtl(unsigned int cmd, void *arg)
{
- struct libcfs_ioctl_data *data = arg;
- lnet_process_id_t id = {0};
- lnet_ni_t *ni;
- int rc;
+ struct libcfs_ioctl_data *data = arg;
+ struct lnet_ioctl_config_data *config;
+ lnet_process_id_t id = {0};
+ lnet_ni_t *ni;
+ int rc;
+
+ CLASSERT(LIBCFS_IOC_DATA_MAX >= sizeof(struct lnet_ioctl_net_config) +
+ sizeof(struct lnet_ioctl_config_data));
+ LASSERT(the_lnet.ln_init);
- LASSERT (the_lnet.ln_init);
- LASSERT (the_lnet.ln_refcount > 0);
+ switch (cmd) {
+ case IOC_LIBCFS_GET_NI:
+ rc = LNetGetId(data->ioc_count, &id);
+ data->ioc_nid = id.nid;
+ return rc;
+
+ case IOC_LIBCFS_FAIL_NID:
+ return lnet_fail_nid(data->ioc_nid, data->ioc_count);
+
+ case IOC_LIBCFS_ADD_ROUTE:
+ config = arg;
+
+ if (config->cfg_hdr.ioc_len < sizeof(*config))
+ return -EINVAL;
+
+ LNET_MUTEX_LOCK(&the_lnet.ln_api_mutex);
+ rc = lnet_add_route(config->cfg_net,
+ config->cfg_config_u.cfg_route.rtr_hop,
+ config->cfg_nid,
+ config->cfg_config_u.cfg_route.
+ rtr_priority);
+ if (rc == 0) {
+ rc = lnet_check_routes();
+ if (rc != 0)
+ lnet_del_route(config->cfg_net,
+ config->cfg_nid);
+ }
+ LNET_MUTEX_UNLOCK(&the_lnet.ln_api_mutex);
+ return rc;
+
+ case IOC_LIBCFS_DEL_ROUTE:
+ config = arg;
+
+ if (config->cfg_hdr.ioc_len < sizeof(*config))
+ return -EINVAL;
+
+ LNET_MUTEX_LOCK(&the_lnet.ln_api_mutex);
+ rc = lnet_del_route(config->cfg_net, config->cfg_nid);
+ LNET_MUTEX_UNLOCK(&the_lnet.ln_api_mutex);
+ return rc;
+
+ case IOC_LIBCFS_GET_ROUTE:
+ config = arg;
+
+ if (config->cfg_hdr.ioc_len < sizeof(*config))
+ return -EINVAL;
+
+ return lnet_get_route(config->cfg_count,
+ &config->cfg_net,
+ &config->cfg_config_u.cfg_route.rtr_hop,
+ &config->cfg_nid,
+ &config->cfg_config_u.cfg_route.rtr_flags,
+ &config->cfg_config_u.cfg_route.
+ rtr_priority);
+
+ case IOC_LIBCFS_GET_NET: {
+ struct lnet_ioctl_net_config *net_config;
+ size_t total = sizeof(*config) + sizeof(*net_config);
+
+ config = arg;
+
+ if (config->cfg_hdr.ioc_len < total)
+ return -EINVAL;
+
+ net_config = (struct lnet_ioctl_net_config *)
+ config->cfg_bulk;
+ if (config == NULL || net_config == NULL)
+ return -1;
+
+ return lnet_get_net_config(config->cfg_count,
+ &config->cfg_ncpts,
+ &config->cfg_nid,
+ &config->cfg_config_u.
+ cfg_net.net_peer_timeout,
+ &config->cfg_config_u.cfg_net.
+ net_peer_tx_credits,
+ &config->cfg_config_u.cfg_net.
+ net_peer_rtr_credits,
+ &config->cfg_config_u.cfg_net.
+ net_max_tx_credits,
+ net_config);
+ }
- switch (cmd) {
- case IOC_LIBCFS_GET_NI:
- rc = LNetGetId(data->ioc_count, &id);
- data->ioc_nid = id.nid;
- return rc;
-
- case IOC_LIBCFS_FAIL_NID:
- return lnet_fail_nid(data->ioc_nid, data->ioc_count);
-
- case IOC_LIBCFS_ADD_ROUTE:
- rc = lnet_add_route(data->ioc_net, data->ioc_count,
- data->ioc_nid);
- return (rc != 0) ? rc : lnet_check_routes();
-
- case IOC_LIBCFS_DEL_ROUTE:
- return lnet_del_route(data->ioc_net, data->ioc_nid);
-
- case IOC_LIBCFS_GET_ROUTE:
- return lnet_get_route(data->ioc_count,
- &data->ioc_net, &data->ioc_count,
- &data->ioc_nid, &data->ioc_flags);
- case IOC_LIBCFS_NOTIFY_ROUTER:
- return lnet_notify(NULL, data->ioc_nid, data->ioc_flags,
- cfs_time_current() -
- cfs_time_seconds(cfs_time_current_sec() -
- (time_t)data->ioc_u64[0]));
-
- case IOC_LIBCFS_PORTALS_COMPATIBILITY:
- /* This can be removed once lustre stops calling it */
- return 0;
-
- case IOC_LIBCFS_LNET_DIST:
- rc = LNetDist(data->ioc_nid, &data->ioc_nid, &data->ioc_u32[1]);
- if (rc < 0 && rc != -EHOSTUNREACH)
- return rc;
-
- data->ioc_u32[0] = rc;
- return 0;
-
- case IOC_LIBCFS_TESTPROTOCOMPAT:
- LNET_LOCK();
- the_lnet.ln_testprotocompat = data->ioc_flags;
- LNET_UNLOCK();
- return 0;
-
- case IOC_LIBCFS_PING:
- id.nid = data->ioc_nid;
- id.pid = data->ioc_u32[0];
- rc = lnet_ping(id, data->ioc_u32[1], /* timeout */
- (lnet_process_id_t *)data->ioc_pbuf1,
- data->ioc_plen1/sizeof(lnet_process_id_t));
- if (rc < 0)
- return rc;
- data->ioc_count = rc;
- return 0;
-
- case IOC_LIBCFS_DEBUG_PEER: {
- /* CAVEAT EMPTOR: this one designed for calling directly; not
- * via an ioctl */
- id = *((lnet_process_id_t *) arg);
-
- lnet_debug_peer(id.nid);
-
- ni = lnet_net2ni(LNET_NIDNET(id.nid));
- if (ni == NULL) {
- CDEBUG(D_WARNING, "No NI for %s\n", libcfs_id2str(id));
- } else {
- if (ni->ni_lnd->lnd_ctl == NULL) {
- CDEBUG(D_WARNING, "No ctl for %s\n",
- libcfs_id2str(id));
- } else {
- (void)ni->ni_lnd->lnd_ctl(ni, cmd, arg);
- }
-
- lnet_ni_decref(ni);
- }
- return 0;
- }
+ case IOC_LIBCFS_GET_LNET_STATS:
+ {
+ struct lnet_ioctl_lnet_stats *lnet_stats = arg;
+
+ if (lnet_stats->st_hdr.ioc_len < sizeof(*lnet_stats))
+ return -EINVAL;
+
+ lnet_counters_get(&lnet_stats->st_cntrs);
+ return 0;
+ }
- default:
- ni = lnet_net2ni(data->ioc_net);
- if (ni == NULL)
- return -EINVAL;
+#if defined(__KERNEL__) && defined(LNET_ROUTER)
+ case IOC_LIBCFS_CONFIG_RTR:
+ config = arg;
- if (ni->ni_lnd->lnd_ctl == NULL)
- rc = -EINVAL;
- else
- rc = ni->ni_lnd->lnd_ctl(ni, cmd, arg);
+ if (config->cfg_hdr.ioc_len < sizeof(*config))
+ return -EINVAL;
- lnet_ni_decref(ni);
- return rc;
- }
- /* not reached */
+ LNET_MUTEX_LOCK(&the_lnet.ln_api_mutex);
+ if (config->cfg_config_u.cfg_buffers.buf_enable) {
+ rc = lnet_rtrpools_enable();
+ LNET_MUTEX_UNLOCK(&the_lnet.ln_api_mutex);
+ return rc;
+ }
+ lnet_rtrpools_disable();
+ LNET_MUTEX_UNLOCK(&the_lnet.ln_api_mutex);
+ return 0;
+
+ case IOC_LIBCFS_ADD_BUF:
+ config = arg;
+
+ if (config->cfg_hdr.ioc_len < sizeof(*config))
+ return -EINVAL;
+
+ LNET_MUTEX_LOCK(&the_lnet.ln_api_mutex);
+ rc = lnet_rtrpools_adjust(config->cfg_config_u.cfg_buffers.
+ buf_tiny,
+ config->cfg_config_u.cfg_buffers.
+ buf_small,
+ config->cfg_config_u.cfg_buffers.
+ buf_large);
+ LNET_MUTEX_UNLOCK(&the_lnet.ln_api_mutex);
+ return rc;
+#endif
+
+ case IOC_LIBCFS_GET_BUF: {
+ struct lnet_ioctl_pool_cfg *pool_cfg;
+ size_t total = sizeof(*config) + sizeof(*pool_cfg);
+
+ config = arg;
+
+ if (config->cfg_hdr.ioc_len < total)
+ return -EINVAL;
+
+ pool_cfg = (struct lnet_ioctl_pool_cfg *)config->cfg_bulk;
+ return lnet_get_rtr_pool_cfg(config->cfg_count, pool_cfg);
+ }
+
+ case IOC_LIBCFS_GET_PEER_INFO: {
+ struct lnet_ioctl_peer *peer_info = arg;
+
+ if (peer_info->pr_hdr.ioc_len < sizeof(*peer_info))
+ return -EINVAL;
+
+ return lnet_get_peer_info(
+ peer_info->pr_count,
+ &peer_info->pr_nid,
+ peer_info->pr_lnd_u.pr_peer_credits.cr_aliveness,
+ &peer_info->pr_lnd_u.pr_peer_credits.cr_ncpt,
+ &peer_info->pr_lnd_u.pr_peer_credits.cr_refcount,
+ &peer_info->pr_lnd_u.pr_peer_credits.cr_ni_peer_tx_credits,
+ &peer_info->pr_lnd_u.pr_peer_credits.cr_peer_tx_credits,
+ &peer_info->pr_lnd_u.pr_peer_credits.cr_peer_rtr_credits,
+ &peer_info->pr_lnd_u.pr_peer_credits.cr_peer_min_rtr_credits,
+ &peer_info->pr_lnd_u.pr_peer_credits.cr_peer_tx_qnob);
+ }
+
+ case IOC_LIBCFS_NOTIFY_ROUTER:
+ return lnet_notify(NULL, data->ioc_nid, data->ioc_flags,
+ cfs_time_current() -
+ cfs_time_seconds(cfs_time_current_sec() -
+ (time_t)data->ioc_u64[0]));
+
+ case IOC_LIBCFS_PORTALS_COMPATIBILITY:
+ /* This can be removed once lustre stops calling it */
+ return 0;
+
+ case IOC_LIBCFS_LNET_DIST:
+ rc = LNetDist(data->ioc_nid, &data->ioc_nid, &data->ioc_u32[1]);
+ if (rc < 0 && rc != -EHOSTUNREACH)
+ return rc;
+
+ data->ioc_u32[0] = rc;
+ return 0;
+
+ case IOC_LIBCFS_TESTPROTOCOMPAT:
+ lnet_net_lock(LNET_LOCK_EX);
+ the_lnet.ln_testprotocompat = data->ioc_flags;
+ lnet_net_unlock(LNET_LOCK_EX);
+ return 0;
+
+ case IOC_LIBCFS_LNET_FAULT:
+ return lnet_fault_ctl(data->ioc_flags, data);
+
+ case IOC_LIBCFS_PING:
+ id.nid = data->ioc_nid;
+ id.pid = data->ioc_u32[0];
+ rc = lnet_ping(id, data->ioc_u32[1], /* timeout */
+ (lnet_process_id_t __user *)data->ioc_pbuf1,
+ data->ioc_plen1/sizeof(lnet_process_id_t));
+ if (rc < 0)
+ return rc;
+ data->ioc_count = rc;
+ return 0;
+
+ case IOC_LIBCFS_DEBUG_PEER: {
+ /* CAVEAT EMPTOR: this one designed for calling directly; not
+ * via an ioctl */
+ id = *((lnet_process_id_t *) arg);
+
+ lnet_debug_peer(id.nid);
+
+ ni = lnet_net2ni(LNET_NIDNET(id.nid));
+ if (ni == NULL) {
+ CDEBUG(D_WARNING, "No NI for %s\n", libcfs_id2str(id));
+ } else {
+ if (ni->ni_lnd->lnd_ctl == NULL) {
+ CDEBUG(D_WARNING, "No ctl for %s\n",
+ libcfs_id2str(id));
+ } else {
+ (void)ni->ni_lnd->lnd_ctl(ni, cmd, arg);
+ }
+
+ lnet_ni_decref(ni);
+ }
+ return 0;
+ }
+
+ default:
+ ni = lnet_net2ni(data->ioc_net);
+ if (ni == NULL)
+ return -EINVAL;
+
+ if (ni->ni_lnd->lnd_ctl == NULL)
+ rc = -EINVAL;
+ else
+ rc = ni->ni_lnd->lnd_ctl(ni, cmd, arg);
+
+ lnet_ni_decref(ni);
+ return rc;
+ }
+ /* not reached */
}
+EXPORT_SYMBOL(LNetCtl);
/**
* Retrieve the lnet_process_id_t ID of LNet interface at \a index. Note that
int
LNetGetId(unsigned int index, lnet_process_id_t *id)
{
- lnet_ni_t *ni;
- cfs_list_t *tmp;
- int rc = -ENOENT;
+ struct lnet_ni *ni;
+ struct list_head *tmp;
+ int cpt;
+ int rc = -ENOENT;
- LASSERT (the_lnet.ln_init);
- LASSERT (the_lnet.ln_refcount > 0);
-
- LNET_LOCK();
+ LASSERT(the_lnet.ln_init);
+ LASSERT(the_lnet.ln_refcount > 0);
- cfs_list_for_each(tmp, &the_lnet.ln_nis) {
- if (index-- != 0)
- continue;
+ cpt = lnet_net_lock_current();
- ni = cfs_list_entry(tmp, lnet_ni_t, ni_list);
+ list_for_each(tmp, &the_lnet.ln_nis) {
+ if (index-- != 0)
+ continue;
- id->nid = ni->ni_nid;
- id->pid = the_lnet.ln_pid;
- rc = 0;
- break;
- }
+ ni = list_entry(tmp, lnet_ni_t, ni_list);
- LNET_UNLOCK();
+ id->nid = ni->ni_nid;
+ id->pid = the_lnet.ln_pid;
+ rc = 0;
+ break;
+ }
- return rc;
+ lnet_net_unlock(cpt);
+ return rc;
}
+EXPORT_SYMBOL(LNetGetId);
/**
* Print a string representation of handle \a h into buffer \a str of
{
snprintf(str, len, LPX64, h.cookie);
}
+EXPORT_SYMBOL(LNetSnprintHandle);
static int
-lnet_create_ping_info(void)
-{
- int i;
- int n;
- int rc;
- unsigned int infosz;
- lnet_ni_t *ni;
- lnet_process_id_t id;
- lnet_ping_info_t *pinfo;
-
- for (n = 0; ; n++) {
- rc = LNetGetId(n, &id);
- if (rc == -ENOENT)
- break;
-
- LASSERT (rc == 0);
- }
-
- infosz = offsetof(lnet_ping_info_t, pi_ni[n]);
- LIBCFS_ALLOC(pinfo, infosz);
- if (pinfo == NULL) {
- CERROR("Can't allocate ping info[%d]\n", n);
- return -ENOMEM;
- }
-
- pinfo->pi_nnis = n;
- pinfo->pi_pid = the_lnet.ln_pid;
- pinfo->pi_magic = LNET_PROTO_PING_MAGIC;
- pinfo->pi_version = LNET_PROTO_PING_VERSION;
-
- for (i = 0; i < n; i++) {
- lnet_ni_status_t *ns = &pinfo->pi_ni[i];
-
- rc = LNetGetId(i, &id);
- LASSERT (rc == 0);
-
- ns->ns_nid = id.nid;
- ns->ns_status = LNET_NI_STATUS_UP;
-
- LNET_LOCK();
-
- ni = lnet_nid2ni_locked(id.nid);
- LASSERT (ni != NULL);
- LASSERT (ni->ni_status == NULL);
- ni->ni_status = ns;
- lnet_ni_decref_locked(ni);
-
- LNET_UNLOCK();
- }
-
- the_lnet.ln_ping_info = pinfo;
- return 0;
-}
-
-static void
-lnet_destroy_ping_info(void)
-{
- lnet_ni_t *ni;
-
- LNET_LOCK();
-
- cfs_list_for_each_entry (ni, &the_lnet.ln_nis, ni_list) {
- ni->ni_status = NULL;
- }
-
- LNET_UNLOCK();
-
- LIBCFS_FREE(the_lnet.ln_ping_info,
- offsetof(lnet_ping_info_t,
- pi_ni[the_lnet.ln_ping_info->pi_nnis]));
- the_lnet.ln_ping_info = NULL;
- return;
-}
-
-int
-lnet_ping_target_init(void)
-{
- lnet_md_t md = {0};
- lnet_handle_me_t meh;
- lnet_process_id_t id;
- int rc;
- int rc2;
- int infosz;
-
- rc = lnet_create_ping_info();
- if (rc != 0)
- return rc;
-
- /* We can have a tiny EQ since we only need to see the unlink event on
- * teardown, which by definition is the last one! */
- rc = LNetEQAlloc(2, LNET_EQ_HANDLER_NONE, &the_lnet.ln_ping_target_eq);
- if (rc != 0) {
- CERROR("Can't allocate ping EQ: %d\n", rc);
- goto failed_0;
- }
-
- memset(&id, 0, sizeof(lnet_process_id_t));
- id.nid = LNET_NID_ANY;
- id.pid = LNET_PID_ANY;
-
- rc = LNetMEAttach(LNET_RESERVED_PORTAL, id,
- LNET_PROTO_PING_MATCHBITS, 0,
- LNET_UNLINK, LNET_INS_AFTER,
- &meh);
- if (rc != 0) {
- CERROR("Can't create ping ME: %d\n", rc);
- goto failed_1;
- }
-
- /* initialize md content */
- infosz = offsetof(lnet_ping_info_t,
- pi_ni[the_lnet.ln_ping_info->pi_nnis]);
- md.start = the_lnet.ln_ping_info;
- md.length = infosz;
- md.threshold = LNET_MD_THRESH_INF;
- md.max_size = 0;
- md.options = LNET_MD_OP_GET | LNET_MD_TRUNCATE |
- LNET_MD_MANAGE_REMOTE;
- md.user_ptr = NULL;
- md.eq_handle = the_lnet.ln_ping_target_eq;
-
- rc = LNetMDAttach(meh, md,
- LNET_RETAIN,
- &the_lnet.ln_ping_target_md);
- if (rc != 0) {
- CERROR("Can't attach ping MD: %d\n", rc);
- goto failed_2;
- }
-
- return 0;
-
- failed_2:
- rc2 = LNetMEUnlink(meh);
- LASSERT (rc2 == 0);
- failed_1:
- rc2 = LNetEQFree(the_lnet.ln_ping_target_eq);
- LASSERT (rc2 == 0);
- failed_0:
- lnet_destroy_ping_info();
- return rc;
-}
-
-void
-lnet_ping_target_fini(void)
+lnet_ping(lnet_process_id_t id, int timeout_ms, lnet_process_id_t __user *ids,
+ int n_ids)
{
- lnet_event_t event;
- int rc;
- int which;
- int timeout_ms = 1000;
- cfs_sigset_t blocked = cfs_block_allsigs();
-
- LNetMDUnlink(the_lnet.ln_ping_target_md);
- /* NB md could be busy; this just starts the unlink */
-
- for (;;) {
- rc = LNetEQPoll(&the_lnet.ln_ping_target_eq, 1,
- timeout_ms, &event, &which);
-
- /* I expect overflow... */
- LASSERT (rc >= 0 || rc == -EOVERFLOW);
-
- if (rc == 0) {
- /* timed out: provide a diagnostic */
- CWARN("Still waiting for ping MD to unlink\n");
- timeout_ms *= 2;
- continue;
- }
+ lnet_handle_eq_t eqh;
+ lnet_handle_md_t mdh;
+ lnet_event_t event;
+ lnet_md_t md = { NULL };
+ int which;
+ int unlinked = 0;
+ int replied = 0;
+ const int a_long_time = 60000; /* mS */
+ int infosz;
+ lnet_ping_info_t *info;
+ lnet_process_id_t tmpid;
+ int i;
+ int nob;
+ int rc;
+ int rc2;
+ sigset_t blocked;
+
+ infosz = offsetof(lnet_ping_info_t, pi_ni[n_ids]);
+
+ if (n_ids <= 0 ||
+ id.nid == LNET_NID_ANY ||
+ timeout_ms > 500000 || /* arbitrary limit! */
+ n_ids > 20) /* arbitrary limit! */
+ return -EINVAL;
+
+ if (id.pid == LNET_PID_ANY)
+ id.pid = LNET_PID_LUSTRE;
+
+ LIBCFS_ALLOC(info, infosz);
+ if (info == NULL)
+ return -ENOMEM;
+
+ /* NB 2 events max (including any unlink event) */
+ rc = LNetEQAlloc(2, LNET_EQ_HANDLER_NONE, &eqh);
+ if (rc != 0) {
+ CERROR("Can't allocate EQ: %d\n", rc);
+ goto out_0;
+ }
- /* Got a valid event */
- if (event.unlinked)
- break;
- }
+ /* initialize md content */
+ md.start = info;
+ md.length = infosz;
+ md.threshold = 2; /*GET/REPLY*/
+ md.max_size = 0;
+ md.options = LNET_MD_TRUNCATE;
+ md.user_ptr = NULL;
+ md.eq_handle = eqh;
- rc = LNetEQFree(the_lnet.ln_ping_target_eq);
- LASSERT (rc == 0);
- lnet_destroy_ping_info();
- cfs_restore_sigs(blocked);
-}
+ rc = LNetMDBind(md, LNET_UNLINK, &mdh);
+ if (rc != 0) {
+ CERROR("Can't bind MD: %d\n", rc);
+ goto out_1;
+ }
-int
-lnet_ping (lnet_process_id_t id, int timeout_ms, lnet_process_id_t *ids, int n_ids)
-{
- lnet_handle_eq_t eqh;
- lnet_handle_md_t mdh;
- lnet_event_t event;
- lnet_md_t md = {0};
- int which;
- int unlinked = 0;
- int replied = 0;
- const int a_long_time = 60000; /* mS */
- int infosz = offsetof(lnet_ping_info_t, pi_ni[n_ids]);
- lnet_ping_info_t *info;
- lnet_process_id_t tmpid;
- int i;
- int nob;
- int rc;
- int rc2;
- cfs_sigset_t blocked;
-
- if (n_ids <= 0 ||
- id.nid == LNET_NID_ANY ||
- timeout_ms > 500000 || /* arbitrary limit! */
- n_ids > 20) /* arbitrary limit! */
- return -EINVAL;
-
- if (id.pid == LNET_PID_ANY)
- id.pid = LUSTRE_SRV_LNET_PID;
-
- LIBCFS_ALLOC(info, infosz);
- if (info == NULL)
- return -ENOMEM;
-
- /* NB 2 events max (including any unlink event) */
- rc = LNetEQAlloc(2, LNET_EQ_HANDLER_NONE, &eqh);
- if (rc != 0) {
- CERROR("Can't allocate EQ: %d\n", rc);
- goto out_0;
- }
+ rc = LNetGet(LNET_NID_ANY, mdh, id,
+ LNET_RESERVED_PORTAL,
+ LNET_PROTO_PING_MATCHBITS, 0);
- /* initialize md content */
- md.start = info;
- md.length = infosz;
- md.threshold = 2; /*GET/REPLY*/
- md.max_size = 0;
- md.options = LNET_MD_TRUNCATE;
- md.user_ptr = NULL;
- md.eq_handle = eqh;
-
- rc = LNetMDBind(md, LNET_UNLINK, &mdh);
- if (rc != 0) {
- CERROR("Can't bind MD: %d\n", rc);
- goto out_1;
- }
+ if (rc != 0) {
+ /* Don't CERROR; this could be deliberate! */
- rc = LNetGet(LNET_NID_ANY, mdh, id,
- LNET_RESERVED_PORTAL,
- LNET_PROTO_PING_MATCHBITS, 0);
+ rc2 = LNetMDUnlink(mdh);
+ LASSERT(rc2 == 0);
- if (rc != 0) {
- /* Don't CERROR; this could be deliberate! */
+ /* NB must wait for the UNLINK event below... */
+ unlinked = 1;
+ timeout_ms = a_long_time;
+ }
- rc2 = LNetMDUnlink(mdh);
- LASSERT (rc2 == 0);
+ do {
+ /* MUST block for unlink to complete */
+ if (unlinked)
+ blocked = cfs_block_allsigs();
+
+ rc2 = LNetEQPoll(&eqh, 1, timeout_ms, &event, &which);
+
+ if (unlinked)
+ cfs_restore_sigs(blocked);
+
+ CDEBUG(D_NET, "poll %d(%d %d)%s\n", rc2,
+ (rc2 <= 0) ? -1 : event.type,
+ (rc2 <= 0) ? -1 : event.status,
+ (rc2 > 0 && event.unlinked) ? " unlinked" : "");
+
+ LASSERT(rc2 != -EOVERFLOW); /* can't miss anything */
+
+ if (rc2 <= 0 || event.status != 0) {
+ /* timeout or error */
+ if (!replied && rc == 0)
+ rc = (rc2 < 0) ? rc2 :
+ (rc2 == 0) ? -ETIMEDOUT :
+ event.status;
+
+ if (!unlinked) {
+ /* Ensure completion in finite time... */
+ LNetMDUnlink(mdh);
+ /* No assertion (racing with network) */
+ unlinked = 1;
+ timeout_ms = a_long_time;
+ } else if (rc2 == 0) {
+ /* timed out waiting for unlink */
+ CWARN("ping %s: late network completion\n",
+ libcfs_id2str(id));
+ }
+ } else if (event.type == LNET_EVENT_REPLY) {
+ replied = 1;
+ rc = event.mlength;
+ }
- /* NB must wait for the UNLINK event below... */
- unlinked = 1;
- timeout_ms = a_long_time;
- }
+ } while (rc2 <= 0 || !event.unlinked);
- do {
- /* MUST block for unlink to complete */
- if (unlinked)
- blocked = cfs_block_allsigs();
-
- rc2 = LNetEQPoll(&eqh, 1, timeout_ms, &event, &which);
-
- if (unlinked)
- cfs_restore_sigs(blocked);
-
- CDEBUG(D_NET, "poll %d(%d %d)%s\n", rc2,
- (rc2 <= 0) ? -1 : event.type,
- (rc2 <= 0) ? -1 : event.status,
- (rc2 > 0 && event.unlinked) ? " unlinked" : "");
-
- LASSERT (rc2 != -EOVERFLOW); /* can't miss anything */
-
- if (rc2 <= 0 || event.status != 0) {
- /* timeout or error */
- if (!replied && rc == 0)
- rc = (rc2 < 0) ? rc2 :
- (rc2 == 0) ? -ETIMEDOUT :
- event.status;
-
- if (!unlinked) {
- /* Ensure completion in finite time... */
- LNetMDUnlink(mdh);
- /* No assertion (racing with network) */
- unlinked = 1;
- timeout_ms = a_long_time;
- } else if (rc2 == 0) {
- /* timed out waiting for unlink */
- CWARN("ping %s: late network completion\n",
- libcfs_id2str(id));
- }
- } else if (event.type == LNET_EVENT_REPLY) {
- replied = 1;
- rc = event.mlength;
- }
-
- } while (rc2 <= 0 || !event.unlinked);
-
- if (!replied) {
- if (rc >= 0)
- CWARN("%s: Unexpected rc >= 0 but no reply!\n",
- libcfs_id2str(id));
- rc = -EIO;
- goto out_1;
- }
+ if (!replied) {
+ if (rc >= 0)
+ CWARN("%s: Unexpected rc >= 0 but no reply!\n",
+ libcfs_id2str(id));
+ rc = -EIO;
+ goto out_1;
+ }
- nob = rc;
- LASSERT (nob >= 0 && nob <= infosz);
+ nob = rc;
+ LASSERT(nob >= 0 && nob <= infosz);
- rc = -EPROTO; /* if I can't parse... */
+ rc = -EPROTO; /* if I can't parse... */
- if (nob < 8) {
- /* can't check magic/version */
- CERROR("%s: ping info too short %d\n",
- libcfs_id2str(id), nob);
- goto out_1;
- }
+ if (nob < 8) {
+ /* can't check magic/version */
+ CERROR("%s: ping info too short %d\n",
+ libcfs_id2str(id), nob);
+ goto out_1;
+ }
- if (info->pi_magic == __swab32(LNET_PROTO_PING_MAGIC)) {
- lnet_swap_pinginfo(info);
- } else if (info->pi_magic != LNET_PROTO_PING_MAGIC) {
- CERROR("%s: Unexpected magic %08x\n",
- libcfs_id2str(id), info->pi_magic);
- goto out_1;
- }
+ if (info->pi_magic == __swab32(LNET_PROTO_PING_MAGIC)) {
+ lnet_swap_pinginfo(info);
+ } else if (info->pi_magic != LNET_PROTO_PING_MAGIC) {
+ CERROR("%s: Unexpected magic %08x\n",
+ libcfs_id2str(id), info->pi_magic);
+ goto out_1;
+ }
- if (info->pi_version != LNET_PROTO_PING_VERSION) {
- CERROR("%s: Unexpected version 0x%x\n",
- libcfs_id2str(id), info->pi_version);
- goto out_1;
- }
+ if ((info->pi_features & LNET_PING_FEAT_NI_STATUS) == 0) {
+ CERROR("%s: ping w/o NI status: 0x%x\n",
+ libcfs_id2str(id), info->pi_features);
+ goto out_1;
+ }
- if (nob < offsetof(lnet_ping_info_t, pi_ni[0])) {
- CERROR("%s: Short reply %d(%d min)\n", libcfs_id2str(id),
- nob, (int)offsetof(lnet_ping_info_t, pi_ni[0]));
- goto out_1;
- }
+ if (nob < offsetof(lnet_ping_info_t, pi_ni[0])) {
+ CERROR("%s: Short reply %d(%d min)\n", libcfs_id2str(id),
+ nob, (int)offsetof(lnet_ping_info_t, pi_ni[0]));
+ goto out_1;
+ }
- if (info->pi_nnis < n_ids)
- n_ids = info->pi_nnis;
+ if (info->pi_nnis < n_ids)
+ n_ids = info->pi_nnis;
- if (nob < offsetof(lnet_ping_info_t, pi_ni[n_ids])) {
- CERROR("%s: Short reply %d(%d expected)\n", libcfs_id2str(id),
- nob, (int)offsetof(lnet_ping_info_t, pi_ni[n_ids]));
- goto out_1;
- }
+ if (nob < offsetof(lnet_ping_info_t, pi_ni[n_ids])) {
+ CERROR("%s: Short reply %d(%d expected)\n", libcfs_id2str(id),
+ nob, (int)offsetof(lnet_ping_info_t, pi_ni[n_ids]));
+ goto out_1;
+ }
- rc = -EFAULT; /* If I SEGV... */
+ rc = -EFAULT; /* If I SEGV... */
- for (i = 0; i < n_ids; i++) {
- tmpid.pid = info->pi_pid;
- tmpid.nid = info->pi_ni[i].ns_nid;
-#ifdef __KERNEL__
- if (cfs_copy_to_user(&ids[i], &tmpid, sizeof(tmpid)))
- goto out_1;
-#else
- ids[i] = tmpid;
-#endif
- }
- rc = info->pi_nnis;
+ for (i = 0; i < n_ids; i++) {
+ tmpid.pid = info->pi_pid;
+ tmpid.nid = info->pi_ni[i].ns_nid;
+ if (copy_to_user(&ids[i], &tmpid, sizeof(tmpid)))
+ goto out_1;
+ }
+ rc = info->pi_nnis;
out_1:
- rc2 = LNetEQFree(eqh);
- if (rc2 != 0)
- CERROR("rc2 %d\n", rc2);
- LASSERT (rc2 == 0);
+ rc2 = LNetEQFree(eqh);
+ if (rc2 != 0)
+ CERROR("rc2 %d\n", rc2);
+ LASSERT(rc2 == 0);
out_0:
- LIBCFS_FREE(info, infosz);
- return rc;
+ LIBCFS_FREE(info, infosz);
+ return rc;
}
git://git.whamcloud.com / fs / lustre-release.git / blobdiff