#define LNET_NRB_TINY (LNET_NRB_TINY_MIN * 4)
#define LNET_NRB_SMALL_MIN 4096 /* min value for each CPT */
#define LNET_NRB_SMALL (LNET_NRB_SMALL_MIN * 4)
+#define LNET_NRB_SMALL_PAGES 1
#define LNET_NRB_LARGE_MIN 256 /* min value for each CPT */
#define LNET_NRB_LARGE (LNET_NRB_LARGE_MIN * 4)
+#define LNET_NRB_LARGE_PAGES ((LNET_MTU + PAGE_CACHE_SIZE - 1) >> \
+ PAGE_CACHE_SHIFT)
static char *forwarding = "";
CFS_MODULE_PARM(forwarding, "s", charp, 0444,
lnet_add_route(__u32 net, unsigned int hops, lnet_nid_t gateway,
unsigned int priority)
{
- struct list_head *e;
- lnet_remotenet_t *rnet;
- lnet_remotenet_t *rnet2;
- lnet_route_t *route;
- lnet_ni_t *ni;
- int add_route;
- int rc;
+ struct list_head *e;
+ lnet_remotenet_t *rnet;
+ lnet_remotenet_t *rnet2;
+ lnet_route_t *route;
+ lnet_ni_t *ni;
+ int add_route;
+ int rc;
CDEBUG(D_NET, "Add route: net %s hops %u priority %u gw %s\n",
libcfs_net2str(net), hops, priority, libcfs_nid2str(gateway));
- if (gateway == LNET_NID_ANY ||
- LNET_NETTYP(LNET_NIDNET(gateway)) == LOLND ||
- net == LNET_NIDNET(LNET_NID_ANY) ||
- LNET_NETTYP(net) == LOLND ||
- LNET_NIDNET(gateway) == net ||
- hops < 1 || hops > 255)
- return (-EINVAL);
-
- if (lnet_islocalnet(net)) /* it's a local network */
- return 0; /* ignore the route entry */
-
- /* Assume net, route, all new */
- LIBCFS_ALLOC(route, sizeof(*route));
- LIBCFS_ALLOC(rnet, sizeof(*rnet));
- if (route == NULL || rnet == NULL) {
- CERROR("Out of memory creating route %s %d %s\n",
- libcfs_net2str(net), hops, libcfs_nid2str(gateway));
- if (route != NULL)
- LIBCFS_FREE(route, sizeof(*route));
- if (rnet != NULL)
- LIBCFS_FREE(rnet, sizeof(*rnet));
- return -ENOMEM;
- }
+ if (gateway == LNET_NID_ANY ||
+ LNET_NETTYP(LNET_NIDNET(gateway)) == LOLND ||
+ net == LNET_NIDNET(LNET_NID_ANY) ||
+ LNET_NETTYP(net) == LOLND ||
+ LNET_NIDNET(gateway) == net ||
+ hops < 1 || hops > 255)
+ return -EINVAL;
+
+ if (lnet_islocalnet(net)) /* it's a local network */
+ return 0; /* ignore the route entry */
+
+ /* Assume net, route, all new */
+ LIBCFS_ALLOC(route, sizeof(*route));
+ LIBCFS_ALLOC(rnet, sizeof(*rnet));
+ if (route == NULL || rnet == NULL) {
+ CERROR("Out of memory creating route %s %d %s\n",
+ libcfs_net2str(net), hops, libcfs_nid2str(gateway));
+ if (route != NULL)
+ LIBCFS_FREE(route, sizeof(*route));
+ if (rnet != NULL)
+ LIBCFS_FREE(rnet, sizeof(*rnet));
+ return -ENOMEM;
+ }
INIT_LIST_HEAD(&rnet->lrn_routes);
- rnet->lrn_net = net;
- route->lr_hops = hops;
+ rnet->lrn_net = net;
+ route->lr_hops = hops;
route->lr_net = net;
route->lr_priority = priority;
LIBCFS_FREE(route, sizeof(*route));
LIBCFS_FREE(rnet, sizeof(*rnet));
- if (rc == -EHOSTUNREACH) { /* gateway is not on a local net */
- return 0; /* ignore the route entry */
- } else {
- CERROR("Error %d creating route %s %d %s\n", rc,
- libcfs_net2str(net), hops,
- libcfs_nid2str(gateway));
- }
- return rc;
- }
+ if (rc == -EHOSTUNREACH) /* gateway is not on a local net. */
+ return 0; /* ignore the route entry */
+ CERROR("Error %d creating route %s %d %s\n", rc,
+ libcfs_net2str(net), hops,
+ libcfs_nid2str(gateway));
+ return rc;
+ }
- LASSERT (!the_lnet.ln_shutdown);
+ LASSERT(!the_lnet.ln_shutdown);
rnet2 = lnet_find_net_locked(net);
if (rnet2 == NULL) {
list_for_each(e, &rnet2->lrn_routes) {
lnet_route_t *route2 = list_entry(e, lnet_route_t, lr_list);
- if (route2->lr_gateway == route->lr_gateway) {
- add_route = 0;
- break;
- }
+ if (route2->lr_gateway == route->lr_gateway) {
+ add_route = 0;
+ break;
+ }
- /* our lookups must be true */
- LASSERT (route2->lr_gateway->lp_nid != gateway);
- }
+ /* our lookups must be true */
+ LASSERT(route2->lr_gateway->lp_nid != gateway);
+ }
- if (add_route) {
+ if (add_route) {
lnet_peer_addref_locked(route->lr_gateway); /* +1 for notify */
lnet_add_route_to_rnet(rnet2, route);
*hops = route->lr_hops;
*priority = route->lr_priority;
*gateway = route->lr_gateway->lp_nid;
- *alive = route->lr_gateway->lp_alive;
+ *alive =
+ route->lr_gateway->lp_alive &&
+ !route->lr_downis;
lnet_net_unlock(cpt);
return 0;
}
__swab32s(&info->pi_magic);
__swab32s(&info->pi_features);
- __swab32s(&info->pi_pid);
- __swab32s(&info->pi_nnis);
- for (i = 0; i < info->pi_nnis && i < LNET_MAX_RTR_NIS; i++) {
- stat = &info->pi_ni[i];
- __swab64s(&stat->ns_nid);
- __swab32s(&stat->ns_status);
- }
- return;
+ __swab32s(&info->pi_pid);
+ __swab32s(&info->pi_nnis);
+ for (i = 0; i < info->pi_nnis && i < LNET_MAX_RTR_NIS; i++) {
+ stat = &info->pi_ni[i];
+ __swab64s(&stat->ns_nid);
+ __swab32s(&stat->ns_status);
+ }
+ return;
}
/**
{
lnet_ping_info_t *info = rcd->rcd_pinginfo;
struct lnet_peer *gw = rcd->rcd_gateway;
- lnet_route_t *rtr;
+ lnet_route_t *rte;
if (!gw->lp_alive)
return;
if ((gw->lp_ping_feats & LNET_PING_FEAT_NI_STATUS) == 0)
return; /* can't carry NI status info */
- list_for_each_entry(rtr, &gw->lp_routes, lr_gwlist) {
+ list_for_each_entry(rte, &gw->lp_routes, lr_gwlist) {
int down = 0;
int up = 0;
int i;
+ if ((gw->lp_ping_feats & LNET_PING_FEAT_RTE_DISABLED) != 0) {
+ rte->lr_downis = 1;
+ continue;
+ }
+
for (i = 0; i < info->pi_nnis && i < LNET_MAX_RTR_NIS; i++) {
lnet_ni_status_t *stat = &info->pi_ni[i];
lnet_nid_t nid = stat->ns_nid;
}
if (stat->ns_status == LNET_NI_STATUS_UP) {
- if (LNET_NIDNET(nid) == rtr->lr_net) {
+ if (LNET_NIDNET(nid) == rte->lr_net) {
up = 1;
break;
}
}
if (up) { /* ignore downed NIs if NI for dest network is up */
- rtr->lr_downis = 0;
+ rte->lr_downis = 0;
continue;
}
- rtr->lr_downis = down;
+ rte->lr_downis = down;
}
}
lnet_rtrbuf_t *
lnet_new_rtrbuf(lnet_rtrbufpool_t *rbp, int cpt)
{
- int npages = rbp->rbp_npages;
- int sz = offsetof(lnet_rtrbuf_t, rb_kiov[npages]);
- struct page *page;
- lnet_rtrbuf_t *rb;
- int i;
+ int npages = rbp->rbp_npages;
+ int sz = offsetof(lnet_rtrbuf_t, rb_kiov[npages]);
+ struct page *page;
+ lnet_rtrbuf_t *rb;
+ int i;
LIBCFS_CPT_ALLOC(rb, lnet_cpt_table(), cpt, sz);
if (rb == NULL)
}
void
-lnet_rtrpool_free_bufs(lnet_rtrbufpool_t *rbp)
+lnet_rtrpool_free_bufs(lnet_rtrbufpool_t *rbp, int cpt)
{
- int npages = rbp->rbp_npages;
- int nbuffers = 0;
- lnet_rtrbuf_t *rb;
+ int npages = rbp->rbp_npages;
+ lnet_rtrbuf_t *rb;
+ struct list_head tmp;
if (rbp->rbp_nbuffers == 0) /* not initialized or already freed */
return;
- LASSERT(list_empty(&rbp->rbp_msgs));
- LASSERT(rbp->rbp_credits == rbp->rbp_nbuffers);
+ INIT_LIST_HEAD(&tmp);
- while (!list_empty(&rbp->rbp_bufs)) {
- LASSERT(rbp->rbp_credits > 0);
+ lnet_net_lock(cpt);
+ lnet_drop_routed_msgs_locked(&rbp->rbp_msgs, cpt);
+ list_splice_init(&rbp->rbp_bufs, &tmp);
+ rbp->rbp_nbuffers = rbp->rbp_credits = 0;
+ rbp->rbp_mincredits = 0;
+ lnet_net_unlock(cpt);
- rb = list_entry(rbp->rbp_bufs.next,
- lnet_rtrbuf_t, rb_list);
+ /* Free buffers on the free list. */
+ while (!list_empty(&tmp)) {
+ rb = list_entry(tmp.next, lnet_rtrbuf_t, rb_list);
list_del(&rb->rb_list);
lnet_destroy_rtrbuf(rb, npages);
- nbuffers++;
}
-
- LASSERT(rbp->rbp_nbuffers == nbuffers);
- LASSERT(rbp->rbp_credits == nbuffers);
-
- rbp->rbp_nbuffers = rbp->rbp_credits = 0;
}
-int
-lnet_rtrpool_alloc_bufs(lnet_rtrbufpool_t *rbp, int nbufs, int cpt)
+static int
+lnet_rtrpool_adjust_bufs(lnet_rtrbufpool_t *rbp, int nbufs, int cpt)
{
- lnet_rtrbuf_t *rb;
- int i;
+ struct list_head rb_list;
+ lnet_rtrbuf_t *rb;
+ int num_rb;
+ int num_buffers = 0;
+ int npages = rbp->rbp_npages;
- if (rbp->rbp_nbuffers != 0) {
- LASSERT (rbp->rbp_nbuffers == nbufs);
- return 0;
- }
+ /* If we are called for less buffers than already in the pool, we
+ * just lower the nbuffers number and excess buffers will be
+ * thrown away as they are returned to the free list. Credits
+ * then get adjusted as well. */
+ if (nbufs <= rbp->rbp_nbuffers) {
+ lnet_net_lock(cpt);
+ rbp->rbp_nbuffers = nbufs;
+ lnet_net_unlock(cpt);
+ return 0;
+ }
- for (i = 0; i < nbufs; i++) {
- rb = lnet_new_rtrbuf(rbp, cpt);
+ INIT_LIST_HEAD(&rb_list);
- if (rb == NULL) {
- CERROR("Failed to allocate %d router bufs of %d pages\n",
- nbufs, rbp->rbp_npages);
- return -ENOMEM;
- }
+ /* allocate the buffers on a local list first. If all buffers are
+ * allocated successfully then join this list to the rbp buffer
+ * list. If not then free all allocated buffers. */
+ num_rb = rbp->rbp_nbuffers;
- rbp->rbp_nbuffers++;
- rbp->rbp_credits++;
- rbp->rbp_mincredits++;
- list_add(&rb->rb_list, &rbp->rbp_bufs);
+ while (num_rb < nbufs) {
+ rb = lnet_new_rtrbuf(rbp, cpt);
+ if (rb == NULL) {
+ CERROR("Failed to allocate %d route bufs of %d pages\n",
+ nbufs, npages);
+ goto failed;
+ }
- /* No allocation "under fire" */
- /* Otherwise we'd need code to schedule blocked msgs etc */
- LASSERT(!the_lnet.ln_routing);
+ list_add(&rb->rb_list, &rb_list);
+ num_buffers++;
+ num_rb++;
}
- LASSERT(rbp->rbp_credits == nbufs);
+ lnet_net_lock(cpt);
+
+ list_splice_tail(&rb_list, &rbp->rbp_bufs);
+ rbp->rbp_nbuffers += num_buffers;
+ rbp->rbp_credits += num_buffers;
+ rbp->rbp_mincredits = rbp->rbp_credits;
+ /* We need to schedule blocked msg using the newly
+ * added buffers. */
+ while (!list_empty(&rbp->rbp_bufs) &&
+ !list_empty(&rbp->rbp_msgs))
+ lnet_schedule_blocked_locked(rbp);
+
+ lnet_net_unlock(cpt);
+
return 0;
+
+failed:
+ while (!list_empty(&rb_list)) {
+ rb = list_entry(rb_list.next, lnet_rtrbuf_t, rb_list);
+ list_del(&rb->rb_list);
+ lnet_destroy_rtrbuf(rb, npages);
+ }
+
+ return -ENOMEM;
}
void
}
void
-lnet_rtrpools_free(void)
+lnet_rtrpools_free(int keep_pools)
{
lnet_rtrbufpool_t *rtrp;
int i;
return;
cfs_percpt_for_each(rtrp, i, the_lnet.ln_rtrpools) {
- lnet_rtrpool_free_bufs(&rtrp[0]);
- lnet_rtrpool_free_bufs(&rtrp[1]);
- lnet_rtrpool_free_bufs(&rtrp[2]);
+ lnet_rtrpool_free_bufs(&rtrp[LNET_TINY_BUF_IDX], i);
+ lnet_rtrpool_free_bufs(&rtrp[LNET_SMALL_BUF_IDX], i);
+ lnet_rtrpool_free_bufs(&rtrp[LNET_LARGE_BUF_IDX], i);
}
- cfs_percpt_free(the_lnet.ln_rtrpools);
- the_lnet.ln_rtrpools = NULL;
+ if (!keep_pools) {
+ cfs_percpt_free(the_lnet.ln_rtrpools);
+ the_lnet.ln_rtrpools = NULL;
+ }
}
static int
-lnet_nrb_tiny_calculate(int npages)
+lnet_nrb_tiny_calculate(void)
{
int nrbs = LNET_NRB_TINY;
}
static int
-lnet_nrb_small_calculate(int npages)
+lnet_nrb_small_calculate(void)
{
int nrbs = LNET_NRB_SMALL;
}
static int
-lnet_nrb_large_calculate(int npages)
+lnet_nrb_large_calculate(void)
{
int nrbs = LNET_NRB_LARGE;
lnet_rtrpools_alloc(int im_a_router)
{
lnet_rtrbufpool_t *rtrp;
- int large_pages = (LNET_MTU + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT;
- int small_pages = 1;
int nrb_tiny;
int nrb_small;
int nrb_large;
int rc;
int i;
- if (!strcmp(forwarding, "")) {
- /* not set either way */
- if (!im_a_router)
- return 0;
- } else if (!strcmp(forwarding, "disabled")) {
- /* explicitly disabled */
- return 0;
- } else if (!strcmp(forwarding, "enabled")) {
- /* explicitly enabled */
- } else {
- LCONSOLE_ERROR_MSG(0x10b, "'forwarding' not set to either "
- "'enabled' or 'disabled'\n");
- return -EINVAL;
- }
+ if (!strcmp(forwarding, "")) {
+ /* not set either way */
+ if (!im_a_router)
+ return 0;
+ } else if (!strcmp(forwarding, "disabled")) {
+ /* explicitly disabled */
+ return 0;
+ } else if (!strcmp(forwarding, "enabled")) {
+ /* explicitly enabled */
+ } else {
+ LCONSOLE_ERROR_MSG(0x10b, "'forwarding' not set to either "
+ "'enabled' or 'disabled'\n");
+ return -EINVAL;
+ }
- nrb_tiny = lnet_nrb_tiny_calculate(0);
+ nrb_tiny = lnet_nrb_tiny_calculate();
if (nrb_tiny < 0)
return -EINVAL;
- nrb_small = lnet_nrb_small_calculate(small_pages);
+ nrb_small = lnet_nrb_small_calculate();
if (nrb_small < 0)
return -EINVAL;
- nrb_large = lnet_nrb_large_calculate(large_pages);
+ nrb_large = lnet_nrb_large_calculate();
if (nrb_large < 0)
return -EINVAL;
}
cfs_percpt_for_each(rtrp, i, the_lnet.ln_rtrpools) {
- lnet_rtrpool_init(&rtrp[0], 0);
- rc = lnet_rtrpool_alloc_bufs(&rtrp[0], nrb_tiny, i);
+ lnet_rtrpool_init(&rtrp[LNET_TINY_BUF_IDX], 0);
+ rc = lnet_rtrpool_adjust_bufs(&rtrp[LNET_TINY_BUF_IDX],
+ nrb_tiny, i);
if (rc != 0)
goto failed;
- lnet_rtrpool_init(&rtrp[1], small_pages);
- rc = lnet_rtrpool_alloc_bufs(&rtrp[1], nrb_small, i);
+ lnet_rtrpool_init(&rtrp[LNET_SMALL_BUF_IDX],
+ LNET_NRB_SMALL_PAGES);
+ rc = lnet_rtrpool_adjust_bufs(&rtrp[LNET_SMALL_BUF_IDX],
+ nrb_small, i);
if (rc != 0)
goto failed;
- lnet_rtrpool_init(&rtrp[2], large_pages);
- rc = lnet_rtrpool_alloc_bufs(&rtrp[2], nrb_large, i);
+ lnet_rtrpool_init(&rtrp[LNET_LARGE_BUF_IDX],
+ LNET_NRB_LARGE_PAGES);
+ rc = lnet_rtrpool_adjust_bufs(&rtrp[LNET_LARGE_BUF_IDX],
+ nrb_large, i);
if (rc != 0)
goto failed;
}
lnet_net_lock(LNET_LOCK_EX);
the_lnet.ln_routing = 1;
lnet_net_unlock(LNET_LOCK_EX);
-
return 0;
failed:
- lnet_rtrpools_free();
+ lnet_rtrpools_free(0);
return rc;
}
int
+lnet_rtrpools_adjust(int tiny, int small, int large)
+{
+ int nrb = 0;
+ int rc = 0;
+ int i;
+ lnet_rtrbufpool_t *rtrp;
+
+ /* this function doesn't revert the changes if adding new buffers
+ * failed. It's up to the user space caller to revert the
+ * changes. */
+
+ if (!the_lnet.ln_routing)
+ return 0;
+
+ /* If the provided values for each buffer pool are different than the
+ * configured values, we need to take action. */
+ if (tiny >= 0 && tiny != tiny_router_buffers) {
+ tiny_router_buffers = tiny;
+ nrb = lnet_nrb_tiny_calculate();
+ cfs_percpt_for_each(rtrp, i, the_lnet.ln_rtrpools) {
+ rc = lnet_rtrpool_adjust_bufs(&rtrp[LNET_TINY_BUF_IDX],
+ nrb, i);
+ if (rc != 0)
+ return rc;
+ }
+ }
+ if (small >= 0 && small != small_router_buffers) {
+ small_router_buffers = small;
+ nrb = lnet_nrb_small_calculate();
+ cfs_percpt_for_each(rtrp, i, the_lnet.ln_rtrpools) {
+ rc = lnet_rtrpool_adjust_bufs(&rtrp[LNET_SMALL_BUF_IDX],
+ nrb, i);
+ if (rc != 0)
+ return rc;
+ }
+ }
+ if (large >= 0 && large != large_router_buffers) {
+ large_router_buffers = large;
+ nrb = lnet_nrb_large_calculate();
+ cfs_percpt_for_each(rtrp, i, the_lnet.ln_rtrpools) {
+ rc = lnet_rtrpool_adjust_bufs(&rtrp[LNET_LARGE_BUF_IDX],
+ nrb, i);
+ if (rc != 0)
+ return rc;
+ }
+ }
+
+ return 0;
+}
+
+int
+lnet_rtrpools_enable(void)
+{
+ int rc;
+
+ if (the_lnet.ln_routing)
+ return 0;
+
+ if (the_lnet.ln_rtrpools == NULL)
+ /* If routing is turned off, and we have never
+ * initialized the pools before, just call the
+ * standard buffer pool allocation routine as
+ * if we are just configuring this for the first
+ * time. */
+ return lnet_rtrpools_alloc(1);
+
+ rc = lnet_rtrpools_adjust(0, 0, 0);
+ if (rc != 0)
+ return rc;
+
+ lnet_net_lock(LNET_LOCK_EX);
+ the_lnet.ln_routing = 1;
+
+ the_lnet.ln_ping_info->pi_features &= ~LNET_PING_FEAT_RTE_DISABLED;
+ lnet_net_unlock(LNET_LOCK_EX);
+
+ return 0;
+}
+
+void
+lnet_rtrpools_disable(void)
+{
+ if (!the_lnet.ln_routing)
+ return;
+
+ lnet_net_lock(LNET_LOCK_EX);
+ the_lnet.ln_routing = 0;
+ the_lnet.ln_ping_info->pi_features |= LNET_PING_FEAT_RTE_DISABLED;
+
+ tiny_router_buffers = 0;
+ small_router_buffers = 0;
+ large_router_buffers = 0;
+ lnet_net_unlock(LNET_LOCK_EX);
+ lnet_rtrpools_free(1);
+}
+
+int
lnet_notify(lnet_ni_t *ni, lnet_nid_t nid, int alive, cfs_time_t when)
{
struct lnet_peer *lp = NULL;
}
void
-lnet_rtrpools_free(void)
+lnet_rtrpools_free(int keep_pools)
{
}
git://git.whamcloud.com / fs / lustre-release.git / blobdiff