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staging: lustre: reflect down routes in /proc/sys/lnet/routes

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We consider routes "down" if the router is down or the router
NI for the target network is down. This should be reflected
in the output of /proc/sys/lnet/routes

Signed-off-by: Chris Horn <hornc@cray.com>
Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-3679
Reviewed-on: http://review.whamcloud.com/7857
Reviewed-by: Cory Spitz <spitzcor@cray.com>
Reviewed-by: Isaac Huang <he.huang@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Chris Horn 2016-02-15 10:25:46 -05:00 committed by Greg Kroah-Hartman
parent 4f0bedeccf
commit 4ee23a84bf
3 changed files with 15 additions and 4 deletions
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13
drivers/staging/lustre/include/linux/lnet/lib-lnet.h
View File

@ -64,6 +64,19 @@ extern lnet_t the_lnet; /* THE network */
/** exclusive lock */
#define LNET_LOCK_EX CFS_PERCPT_LOCK_EX
static inline int lnet_is_route_alive(lnet_route_t *route)
{
/* gateway is down */
if (!route->lr_gateway->lp_alive)
return 0;
/* no NI status, assume it's alive */
if ((route->lr_gateway->lp_ping_feats &
LNET_PING_FEAT_NI_STATUS) == 0)
return 1;
/* has NI status, check # down NIs */
return route->lr_downis == 0;
}
static inline int lnet_is_wire_handle_none(lnet_handle_wire_t *wh)
{
return (wh->wh_interface_cookie == LNET_WIRE_HANDLE_COOKIE_NONE &&

4
drivers/staging/lustre/lnet/lnet/lib-move.c
View File

@ -1156,9 +1156,7 @@ lnet_find_route_locked(lnet_ni_t *ni, lnet_nid_t target, lnet_nid_t rtr_nid)
list_for_each_entry(route, &rnet->lrn_routes, lr_list) {
lp = route->lr_gateway;
if (!lp->lp_alive || /* gateway is down */
((lp->lp_ping_feats & LNET_PING_FEAT_NI_STATUS) &&
route->lr_downis)) /* NI to target is down */
if (!lnet_is_route_alive(route))
continue;
if (ni && lp->lp_ni != ni)

2
drivers/staging/lustre/lnet/lnet/router_proc.c
View File

@ -242,7 +242,7 @@ static int proc_lnet_routes(struct ctl_table *table, int write,
unsigned int hops = route->lr_hops;
unsigned int priority = route->lr_priority;
lnet_nid_t nid = route->lr_gateway->lp_nid;
int alive = route->lr_gateway->lp_alive;
int alive = lnet_is_route_alive(route);
s += snprintf(s, tmpstr + tmpsiz - s,
"%-8s %4u %8u %7s %s\n",