struct lnet_res_container **recs;
int rc = 0;
+ if (requested_pid == LNET_PID_ANY) {
+ /* Don't instantiate LNET just for me */
+ return -ENETDOWN;
+ }
+
LASSERT(!the_lnet.ln_refcount);
the_lnet.ln_routing = 0;
return count;
}
+static lnet_ping_info_t *
+lnet_ping_info_create(int num_ni)
+{
+ lnet_ping_info_t *ping_info;
+ unsigned int infosz;
+
+ infosz = offsetof(lnet_ping_info_t, pi_ni[num_ni]);
+ LIBCFS_ALLOC(ping_info, infosz);
+ if (!ping_info) {
+ CERROR("Can't allocate ping info[%d]\n", num_ni);
+ return NULL;
+ }
+
+ 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;
+
+ return ping_info;
+}
+
+static inline int
+lnet_get_ni_count(void)
+{
+ struct lnet_ni *ni;
+ int count = 0;
+
+ lnet_net_lock(0);
+
+ list_for_each_entry(ni, &the_lnet.ln_nis, ni_list)
+ count++;
+
+ lnet_net_unlock(0);
+
+ return count;
+}
+
+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]));
+}
+
+static void
+lnet_ping_info_destroy(void)
+{
+ struct lnet_ni *ni;
+
+ lnet_net_lock(LNET_LOCK_EX);
+
+ list_for_each_entry(ni, &the_lnet.ln_nis, ni_list) {
+ lnet_ni_lock(ni);
+ ni->ni_status = NULL;
+ lnet_ni_unlock(ni);
+ }
+
+ lnet_ping_info_free(the_lnet.ln_ping_info);
+ the_lnet.ln_ping_info = NULL;
+
+ lnet_net_unlock(LNET_LOCK_EX);
+}
+
+static void
+lnet_ping_event_handler(lnet_event_t *event)
+{
+ lnet_ping_info_t *pinfo = event->md.user_ptr;
+
+ if (event->unlinked)
+ pinfo->pi_features = LNET_PING_FEAT_INVAL;
+}
+
+static int
+lnet_ping_info_setup(lnet_ping_info_t **ppinfo, lnet_handle_md_t *md_handle,
+ int ni_count, bool set_eq)
+{
+ lnet_process_id_t id = {LNET_NID_ANY, LNET_PID_ANY};
+ lnet_handle_me_t me_handle;
+ lnet_md_t md = {0};
+ int rc, rc2;
+
+ if (set_eq) {
+ rc = LNetEQAlloc(0, lnet_ping_event_handler,
+ &the_lnet.ln_ping_target_eq);
+ if (rc) {
+ CERROR("Can't allocate ping EQ: %d\n", rc);
+ return rc;
+ }
+ }
+
+ *ppinfo = lnet_ping_info_create(ni_count);
+ if (!*ppinfo) {
+ rc = -ENOMEM;
+ goto failed_0;
+ }
+
+ rc = LNetMEAttach(LNET_RESERVED_PORTAL, id,
+ LNET_PROTO_PING_MATCHBITS, 0,
+ LNET_UNLINK, LNET_INS_AFTER,
+ &me_handle);
+ if (rc) {
+ CERROR("Can't create ping ME: %d\n", rc);
+ goto failed_1;
+ }
+
+ /* 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) {
+ CERROR("Can't attach ping MD: %d\n", rc);
+ goto failed_2;
+ }
+
+ return 0;
+
+failed_2:
+ rc2 = LNetMEUnlink(me_handle);
+ LASSERT(!rc2);
+failed_1:
+ lnet_ping_info_free(*ppinfo);
+ *ppinfo = NULL;
+failed_0:
+ if (set_eq)
+ LNetEQFree(the_lnet.ln_ping_target_eq);
+ return rc;
+}
+
+static void
+lnet_ping_md_unlink(lnet_ping_info_t *pinfo, lnet_handle_md_t *md_handle)
+{
+ sigset_t blocked = cfs_block_allsigs();
+
+ LNetMDUnlink(*md_handle);
+ LNetInvalidateHandle(md_handle);
+
+ /* 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");
+ set_current_state(TASK_UNINTERRUPTIBLE);
+ schedule_timeout(cfs_time_seconds(1));
+ }
+
+ cfs_restore_sigs(blocked);
+}
+
+static void
+lnet_ping_info_install_locked(lnet_ping_info_t *ping_info)
+{
+ lnet_ni_status_t *ns;
+ lnet_ni_t *ni;
+ int i = 0;
+
+ list_for_each_entry(ni, &the_lnet.ln_nis, ni_list) {
+ LASSERT(i < ping_info->pi_nnis);
+
+ ns = &ping_info->pi_ni[i];
+
+ ns->ns_nid = ni->ni_nid;
+
+ lnet_ni_lock(ni);
+ ns->ns_status = (ni->ni_status) ?
+ ni->ni_status->ns_status : LNET_NI_STATUS_UP;
+ ni->ni_status = ns;
+ lnet_ni_unlock(ni);
+
+ i++;
+ }
+}
+
+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;
+
+ /* switch the NIs to point to the new ping info created */
+ lnet_net_lock(LNET_LOCK_EX);
+
+ if (!the_lnet.ln_routing)
+ pinfo->pi_features |= LNET_PING_FEAT_RTE_DISABLED;
+ lnet_ping_info_install_locked(pinfo);
+
+ if (the_lnet.ln_ping_info) {
+ 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;
+
+ lnet_net_unlock(LNET_LOCK_EX);
+
+ if (old_pinfo) {
+ /* unlink the old ping info */
+ lnet_ping_md_unlink(old_pinfo, &old_md);
+ lnet_ping_info_free(old_pinfo);
+ }
+}
+
+static void
+lnet_ping_target_fini(void)
+{
+ int rc;
+
+ lnet_ping_md_unlink(the_lnet.ln_ping_info,
+ &the_lnet.ln_ping_target_md);
+
+ rc = LNetEQFree(the_lnet.ln_ping_target_eq);
+ LASSERT(!rc);
+
+ lnet_ping_info_destroy();
+}
+
static int
lnet_ni_tq_credits(lnet_ni_t *ni)
{
}
static void
-lnet_shutdown_lndnis(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)
+ continue;
+ /* still busy, add it back to zombie list */
+ list_add(&ni->ni_list, &the_lnet.ln_nis_zombie);
+ break;
+ }
+
+ 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));
+ }
+ set_current_state(TASK_UNINTERRUPTIBLE);
+ schedule_timeout(cfs_time_seconds(1));
+ lnet_net_lock(LNET_LOCK_EX);
+ continue;
+ }
+
+ ni->ni_lnd->lnd_refcount--;
+ lnet_net_unlock(LNET_LOCK_EX);
+
+ islo = ni->ni_lnd->lnd_type == LOLND;
+
+ LASSERT(!in_interrupt());
+ ni->ni_lnd->lnd_shutdown(ni);
+
+ /*
+ * can't deref lnd anymore now; it might have unregistered
+ * itself...
+ */
+ if (!islo)
+ CDEBUG(D_LNI, "Removed LNI %s\n",
+ libcfs_nid2str(ni->ni_nid));
+
+ lnet_ni_free(ni);
+ i = 2;
+
+ lnet_net_lock(LNET_LOCK_EX);
+ }
+}
+
+static void
+lnet_shutdown_lndnis(void)
+{
+ lnet_ni_t *ni;
+ int i;
+
/* NB called holding the global mutex */
/* All quiet on the API front */
lnet_peer_tables_cleanup(NULL);
lnet_net_lock(LNET_LOCK_EX);
- /*
- * 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)
- continue;
- /* still busy, add it back to zombie list */
- list_add(&ni->ni_list, &the_lnet.ln_nis_zombie);
- break;
- }
+ lnet_clear_zombies_nis_locked();
+ the_lnet.ln_shutdown = 0;
+ lnet_net_unlock(LNET_LOCK_EX);
+}
- 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));
- }
- set_current_state(TASK_UNINTERRUPTIBLE);
- schedule_timeout(cfs_time_seconds(1));
- lnet_net_lock(LNET_LOCK_EX);
- continue;
- }
+int
+lnet_shutdown_lndni(__u32 net)
+{
+ lnet_ping_info_t *pinfo;
+ lnet_handle_md_t md_handle;
+ lnet_ni_t *found_ni = NULL;
+ int ni_count;
+ int rc;
- ni->ni_lnd->lnd_refcount--;
- lnet_net_unlock(LNET_LOCK_EX);
+ if (LNET_NETTYP(net) == LOLND)
+ return -EINVAL;
- islo = ni->ni_lnd->lnd_type == LOLND;
+ ni_count = lnet_get_ni_count();
- LASSERT(!in_interrupt());
- ni->ni_lnd->lnd_shutdown(ni);
+ /* create and link a new ping info, before removing the old one */
+ rc = lnet_ping_info_setup(&pinfo, &md_handle, ni_count - 1, false);
+ if (rc)
+ return rc;
- /*
- * can't deref lnd anymore now; it might have unregistered
- * itself...
- */
- if (!islo)
- CDEBUG(D_LNI, "Removed LNI %s\n",
- libcfs_nid2str(ni->ni_nid));
+ /* proceed with shutting down the NI */
+ lnet_net_lock(LNET_LOCK_EX);
- lnet_ni_free(ni);
- i = 2;
+ found_ni = lnet_net2ni_locked(net, 0);
+ if (!found_ni) {
+ lnet_net_unlock(LNET_LOCK_EX);
+ lnet_ping_md_unlink(pinfo, &md_handle);
+ lnet_ping_info_free(pinfo);
+ return -EINVAL;
+ }
- lnet_net_lock(LNET_LOCK_EX);
+ /*
+ * decrement the reference counter on found_ni which was
+ * incremented when we called lnet_net2ni_locked()
+ */
+ lnet_ni_decref_locked(found_ni, 0);
+ /* Move ni to zombie list so nobody can find it anymore */
+ list_move(&found_ni->ni_list, &the_lnet.ln_nis_zombie);
+
+ /* Drop the lock reference for the ln_nis ref. */
+ lnet_ni_decref_locked(found_ni, 0);
+
+ if (!list_empty(&found_ni->ni_cptlist)) {
+ list_del_init(&found_ni->ni_cptlist);
+ lnet_ni_decref_locked(found_ni, 0);
}
- the_lnet.ln_shutdown = 0;
lnet_net_unlock(LNET_LOCK_EX);
+
+ /* Do peer table cleanup for this ni */
+ lnet_peer_tables_cleanup(found_ni);
+
+ lnet_net_lock(LNET_LOCK_EX);
+ lnet_clear_zombies_nis_locked();
+ lnet_net_unlock(LNET_LOCK_EX);
+
+ lnet_ping_target_update(pinfo, md_handle);
+
+ return 0;
}
static int
-lnet_startup_lndnis(void)
+lnet_startup_lndnis(struct list_head *nilist, __s32 peer_timeout,
+ __s32 peer_cr, __s32 peer_buf_cr, __s32 credits,
+ int *ni_count)
{
lnd_t *lnd;
struct lnet_ni *ni;
struct lnet_tx_queue *tq;
- struct list_head nilist;
int i;
int rc = 0;
__u32 lnd_type;
- int nicount = 0;
- char *nets = lnet_get_networks();
-
- INIT_LIST_HEAD(&nilist);
-
- if (!nets)
- goto failed;
-
- rc = lnet_parse_networks(&nilist, nets);
- if (rc)
- goto failed;
- while (!list_empty(&nilist)) {
- ni = list_entry(nilist.next, lnet_ni_t, ni_list);
+ while (!list_empty(nilist)) {
+ ni = list_entry(nilist->next, lnet_ni_t, ni_list);
lnd_type = LNET_NETTYP(LNET_NIDNET(ni->ni_nid));
- LASSERT(libcfs_isknown_lnd(lnd_type));
+ if (!libcfs_isknown_lnd(lnd_type))
+ goto failed;
if (lnd_type == CIBLND ||
lnd_type == OPENIBLND ||
goto failed;
}
+ /* Make sure this new NI is unique. */
+ lnet_net_lock(LNET_LOCK_EX);
+ if (!lnet_net_unique(LNET_NIDNET(ni->ni_nid),
+ &the_lnet.ln_nis)) {
+ if (lnd_type == LOLND) {
+ lnet_net_unlock(LNET_LOCK_EX);
+ list_del(&ni->ni_list);
+ lnet_ni_free(ni);
+ continue;
+ }
+
+ CERROR("Net %s is not unique\n",
+ libcfs_net2str(LNET_NIDNET(ni->ni_nid)));
+ lnet_net_unlock(LNET_LOCK_EX);
+ goto failed;
+ }
+ lnet_net_unlock(LNET_LOCK_EX);
+
mutex_lock(&the_lnet.ln_lnd_mutex);
lnd = lnet_find_lnd_by_type(lnd_type);
goto failed;
}
+ /*
+ * 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);
list_del(&ni->ni_list);
lnet_net_unlock(LNET_LOCK_EX);
+ /* increment the ni_count here to account for the LOLND as
+ * well. If we increment past this point then the number
+ * of count will be missing the LOLND, and then ping and
+ * will not report the LOLND
+ */
+ if (ni_count)
+ (*ni_count)++;
+
if (lnd->lnd_type == LOLND) {
lnet_ni_addref(ni);
LASSERT(!the_lnet.ln_loni);
libcfs_nid2str(ni->ni_nid), ni->ni_peertxcredits,
lnet_ni_tq_credits(ni) * LNET_CPT_NUMBER,
ni->ni_peerrtrcredits, ni->ni_peertimeout);
-
- nicount++;
- }
-
- if (the_lnet.ln_eq_waitni && 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;
}
return 0;
-
- failed:
- lnet_shutdown_lndnis();
-
- while (!list_empty(&nilist)) {
- ni = list_entry(nilist.next, lnet_ni_t, ni_list);
+failed:
+ while (!list_empty(nilist)) {
+ ni = list_entry(nilist->next, lnet_ni_t, ni_list);
list_del(&ni->ni_list);
lnet_ni_free(ni);
}
-
- return -ENETDOWN;
+ return -EINVAL;
}
/**
{
int im_a_router = 0;
int rc;
+ int ni_count = 0;
+ int lnd_type;
+ struct lnet_ni *ni;
+ lnet_ping_info_t *pinfo;
+ lnet_handle_md_t md_handle;
+ struct list_head net_head;
+ char *nets;
+
+ INIT_LIST_HEAD(&net_head);
mutex_lock(&the_lnet.ln_api_mutex);
if (the_lnet.ln_refcount > 0) {
rc = the_lnet.ln_refcount++;
- goto out;
+ 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;
- }
+ nets = lnet_get_networks();
rc = lnet_prepare(requested_pid);
if (rc)
goto failed0;
- rc = lnet_startup_lndnis();
+ rc = lnet_parse_networks(&net_head, nets);
+ if (rc < 0)
+ goto failed1;
+
+ rc = lnet_startup_lndnis(&net_head, -1, -1, -1, -1, &ni_count);
if (rc)
goto failed1;
+ if (the_lnet.ln_eq_waitni && 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));
+ goto failed2;
+ }
+
rc = lnet_parse_routes(lnet_get_routes(), &im_a_router);
if (rc)
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();
+ rc = lnet_ping_info_setup(&pinfo, &md_handle, ni_count, true);
if (rc)
goto failed3;
+ lnet_ping_target_update(pinfo, md_handle);
+
rc = lnet_router_checker_start();
if (rc)
goto failed4;
lnet_router_debugfs_init();
- goto out;
+
+ mutex_unlock(&the_lnet.ln_api_mutex);
+
+ return 0;
failed4:
- lnet_ping_target_fini();
- failed3:
the_lnet.ln_refcount = 0;
+ lnet_ping_md_unlink(pinfo, &md_handle);
+ lnet_ping_info_free(pinfo);
+ failed3:
lnet_acceptor_stop();
+ rc = LNetEQFree(the_lnet.ln_ping_target_eq);
+ LASSERT(!rc);
failed2:
lnet_destroy_routes();
lnet_shutdown_lndnis();
lnet_unprepare();
failed0:
LASSERT(rc < 0);
- out:
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;
}
EXPORT_SYMBOL(LNetNIInit);
}
EXPORT_SYMBOL(LNetNIFini);
+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;
+
+ 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;
+
+ mutex_lock(&the_lnet.ln_api_mutex);
+
+ if (rc > 1) {
+ rc = -EINVAL; /* only add one interface per call */
+ goto failed0;
+ }
+
+ rc = lnet_ping_info_setup(&pinfo, &md_handle, 1 + lnet_get_ni_count(),
+ false);
+ if (rc)
+ goto failed0;
+
+ rc = lnet_startup_lndnis(&net_head, peer_timeout, peer_cr,
+ peer_buf_cr, credits, NULL);
+ if (rc)
+ goto failed1;
+
+ lnet_ping_target_update(pinfo, md_handle);
+ mutex_unlock(&the_lnet.ln_api_mutex);
+
+ return 0;
+
+failed1:
+ lnet_ping_md_unlink(pinfo, &md_handle);
+ lnet_ping_info_free(pinfo);
+failed0:
+ 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)
+{
+ int rc;
+
+ mutex_lock(&the_lnet.ln_api_mutex);
+ rc = lnet_shutdown_lndni(net);
+ mutex_unlock(&the_lnet.ln_api_mutex);
+
+ return rc;
+}
+
/**
* LNet ioctl handler.
*
unsigned long secs_passed;
LASSERT(the_lnet.ln_init);
- LASSERT(the_lnet.ln_refcount > 0);
switch (cmd) {
case IOC_LIBCFS_GET_NI:
return lnet_fail_nid(data->ioc_nid, data->ioc_count);
case IOC_LIBCFS_ADD_ROUTE:
+ mutex_lock(&the_lnet.ln_api_mutex);
rc = lnet_add_route(data->ioc_net, data->ioc_count,
data->ioc_nid, data->ioc_priority);
- return (rc) ? rc : lnet_check_routes();
+ mutex_unlock(&the_lnet.ln_api_mutex);
+ return rc ? rc : lnet_check_routes();
case IOC_LIBCFS_DEL_ROUTE:
- return lnet_del_route(data->ioc_net, data->ioc_nid);
+ mutex_lock(&the_lnet.ln_api_mutex);
+ rc = lnet_del_route(data->ioc_net, data->ioc_nid);
+ mutex_unlock(&the_lnet.ln_api_mutex);
+ return rc;
case IOC_LIBCFS_GET_ROUTE:
return lnet_get_route(data->ioc_count,
}
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);
- }
-
- infosz = offsetof(lnet_ping_info_t, pi_ni[n]);
- LIBCFS_ALLOC(pinfo, infosz);
- if (!pinfo) {
- 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_features = LNET_PING_FEAT_NI_STATUS;
- if (!the_lnet.ln_routing)
- pinfo->pi_features |= LNET_PING_FEAT_RTE_DISABLED;
-
- for (i = 0; i < n; i++) {
- lnet_ni_status_t *ns = &pinfo->pi_ni[i];
-
- rc = LNetGetId(i, &id);
- LASSERT(!rc);
-
- ns->ns_nid = id.nid;
- ns->ns_status = LNET_NI_STATUS_UP;
-
- lnet_net_lock(0);
-
- ni = lnet_nid2ni_locked(id.nid, 0);
- LASSERT(ni);
-
- lnet_ni_lock(ni);
- LASSERT(!ni->ni_status);
- ni->ni_status = ns;
- lnet_ni_unlock(ni);
-
- lnet_ni_decref_locked(ni, 0);
- lnet_net_unlock(0);
- }
-
- the_lnet.ln_ping_info = pinfo;
- return 0;
-}
-
-static void
-lnet_destroy_ping_info(void)
-{
- struct lnet_ni *ni;
-
- lnet_net_lock(0);
-
- list_for_each_entry(ni, &the_lnet.ln_nis, ni_list) {
- lnet_ni_lock(ni);
- ni->ni_status = NULL;
- lnet_ni_unlock(ni);
- }
-
- lnet_net_unlock(0);
-
- 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;
-}
-
-int
-lnet_ping_target_init(void)
-{
- lnet_md_t md = { NULL };
- lnet_handle_me_t meh;
- lnet_process_id_t id;
- int rc;
- int rc2;
- int infosz;
-
- rc = lnet_create_ping_info();
- if (rc)
- 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) {
- 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) {
- 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) {
- CERROR("Can't attach ping MD: %d\n", rc);
- goto failed_2;
- }
-
- return 0;
-
- failed_2:
- rc2 = LNetMEUnlink(meh);
- LASSERT(!rc2);
- failed_1:
- rc2 = LNetEQFree(the_lnet.ln_ping_target_eq);
- LASSERT(!rc2);
- failed_0:
- lnet_destroy_ping_info();
- return rc;
-}
-
-void
-lnet_ping_target_fini(void)
-{
- lnet_event_t event;
- int rc;
- int which;
- int timeout_ms = 1000;
- 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) {
- /* timed out: provide a diagnostic */
- CWARN("Still waiting for ping MD to unlink\n");
- timeout_ms *= 2;
- continue;
- }
-
- /* Got a valid event */
- if (event.unlinked)
- break;
- }
-
- rc = LNetEQFree(the_lnet.ln_ping_target_eq);
- LASSERT(!rc);
- lnet_destroy_ping_info();
- cfs_restore_sigs(blocked);
-}
-
static int lnet_ping(lnet_process_id_t id, int timeout_ms,
lnet_process_id_t __user *ids, int n_ids)
{
int unlinked = 0;
int replied = 0;
const int a_long_time = 60000; /* mS */
- int infosz = offsetof(lnet_ping_info_t, pi_ni[n_ids]);
+ int infosz;
lnet_ping_info_t *info;
lnet_process_id_t tmpid;
int i;
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! */
projects / deliverable / linux.git / commitdiff
