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staging/lustre/lnet: Add LNet Router Priority parameter 

This change adds a priority parameter to the route module settings.
This paramter can be >= 0. Like hops, the lower the prioirty number
the higher the priority.  So lower numbered priorities will be
selected over higher numbers.

Lustre-change: http://review.whamcloud.com/5663
Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-2934
Signed-off-by: Doug Oucharek <doug.s.oucharek@intel.com>
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Reviewed-by: Amir Shehata <amir.shehata@intel.com>
Reviewed-by: Isaac Huang <he.huang@intel.com>
Reviewed-by: Oleg Drokin <oleg.drokin@intel.com>
Signed-off-by: Peng Tao <bergwolf@gmail.com>
Signed-off-by: Andreas Dilger <andreas.dilger@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Doug Oucharek 2013-12-09 22:56:54 +08:00 committed by Greg Kroah-Hartman
parent 32d3b6de68
commit e75fb87f86
8 changed files with 72 additions and 21 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
drivers/staging/lustre/include/linux/libcfs/libcfs_ioctl.h
View File

@ -69,6 +69,7 @@ struct libcfs_ioctl_data {
char ioc_bulk[0];
};
#define ioc_priority ioc_u32[0]
struct libcfs_ioctl_hdr {
__u32 ioc_len;

5
drivers/staging/lustre/include/linux/lnet/lib-lnet.h
View File

@ -650,12 +650,13 @@ extern lnet_ni_t *lnet_net2ni(__u32 net);
int lnet_notify(lnet_ni_t *ni, lnet_nid_t peer, int alive, cfs_time_t when);
void lnet_notify_locked(lnet_peer_t *lp, int notifylnd, int alive, cfs_time_t when);
int lnet_add_route(__u32 net, unsigned int hops, lnet_nid_t gateway_nid);
int lnet_add_route(__u32 net, unsigned int hops, lnet_nid_t gateway_nid,
unsigned int priority);
int lnet_check_routes(void);
int lnet_del_route(__u32 net, lnet_nid_t gw_nid);
void lnet_destroy_routes(void);
int lnet_get_route(int idx, __u32 *net, __u32 *hops,
lnet_nid_t *gateway, __u32 *alive);
lnet_nid_t *gateway, __u32 *alive, __u32 *priority);
void lnet_proc_init(void);
void lnet_proc_fini(void);
int lnet_rtrpools_alloc(int im_a_router);

2
drivers/staging/lustre/include/linux/lnet/lib-types.h
View File

@ -478,7 +478,6 @@ typedef struct lnet_peer {
lnet_rc_data_t *lp_rcd; /* router checker state */
} lnet_peer_t;
/* peer hash size */
#define LNET_PEER_HASH_BITS 9
#define LNET_PEER_HASH_SIZE (1 << LNET_PEER_HASH_BITS)
@ -504,6 +503,7 @@ typedef struct {
int lr_seq; /* sequence for round-robin */
unsigned int lr_downis; /* number of down NIs */
unsigned int lr_hops; /* how far I am */
unsigned int lr_priority; /* route priority */
} lnet_route_t;
#define LNET_REMOTE_NETS_HASH_DEFAULT (1U << 7)

5
drivers/staging/lustre/lnet/lnet/api-ni.c
View File

@ -1436,7 +1436,7 @@ LNetCtl(unsigned int cmd, void *arg)
case IOC_LIBCFS_ADD_ROUTE:
rc = lnet_add_route(data->ioc_net, data->ioc_count,
data->ioc_nid);
data->ioc_nid, data->ioc_priority);
return (rc != 0) ? rc : lnet_check_routes();
case IOC_LIBCFS_DEL_ROUTE:
@ -1445,7 +1445,8 @@ LNetCtl(unsigned int cmd, void *arg)
case IOC_LIBCFS_GET_ROUTE:
return lnet_get_route(data->ioc_count,
&data->ioc_net, &data->ioc_count,
&data->ioc_nid, &data->ioc_flags);
&data->ioc_nid, &data->ioc_flags,
&data->ioc_priority);
case IOC_LIBCFS_NOTIFY_ROUTER:
return lnet_notify(NULL, data->ioc_nid, data->ioc_flags,
cfs_time_current() -

39
drivers/staging/lustre/lnet/lnet/config.c
View File

@ -603,6 +603,37 @@ lnet_parse_hops(char *str, unsigned int *hops)
*hops > 0 && *hops < 256);
}
#define LNET_PRIORITY_SEPARATOR (':')
int
lnet_parse_priority(char *str, unsigned int *priority, char **token)
{
int nob;
char *sep;
int len;
sep = strchr(str, LNET_PRIORITY_SEPARATOR);
if (sep == NULL) {
*priority = 0;
return 0;
}
len = strlen(sep + 1);
if ((sscanf((sep+1), "%u%n", priority, &nob) < 1) || (len != nob)) {
/* Update the caller's token pointer so it treats the found
priority as the token to report in the error message. */
*token += sep - str + 1;
return -1;
}
CDEBUG(D_NET, "gateway %s, priority %d, nob %d\n", str, *priority, nob);
/*
* Change priority separator to \0 to be able to parse NID
*/
*sep = '\0';
return 0;
}
int
lnet_parse_route(char *str, int *im_a_router)
@ -624,6 +655,7 @@ lnet_parse_route(char *str, int *im_a_router)
int myrc = -1;
unsigned int hops;
int got_hops = 0;
unsigned int priority = 0;
INIT_LIST_HEAD(&gateways);
INIT_LIST_HEAD(&nets);
@ -691,6 +723,11 @@ lnet_parse_route(char *str, int *im_a_router)
LNET_NETTYP(net) == LOLND)
goto token_error;
} else {
rc = lnet_parse_priority(ltb->ltb_text,
&priority, &token);
if (rc < 0)
goto token_error;
nid = libcfs_str2nid(ltb->ltb_text);
if (nid == LNET_NID_ANY ||
LNET_NETTYP(LNET_NIDNET(nid)) == LOLND)
@ -720,7 +757,7 @@ lnet_parse_route(char *str, int *im_a_router)
continue;
}
rc = lnet_add_route(net, hops, nid);
rc = lnet_add_route(net, hops, nid, priority);
if (rc != 0) {
CERROR("Can't create route to %s via %s\n",
libcfs_net2str(net),

6
drivers/staging/lustre/lnet/lnet/lib-move.c
View File

@ -1074,6 +1074,12 @@ lnet_compare_routes(lnet_route_t *r1, lnet_route_t *r2)
lnet_peer_t *p1 = r1->lr_gateway;
lnet_peer_t *p2 = r2->lr_gateway;
if (r1->lr_priority < r2->lr_priority)
return 1;
if (r1->lr_priority > r2->lr_priority)
return -1;
if (r1->lr_hops < r2->lr_hops)
return 1;

19
drivers/staging/lustre/lnet/lnet/router.c
View File

@ -301,7 +301,8 @@ lnet_add_route_to_rnet (lnet_remotenet_t *rnet, lnet_route_t *route)
}
int
lnet_add_route (__u32 net, unsigned int hops, lnet_nid_t gateway)
lnet_add_route(__u32 net, unsigned int hops, lnet_nid_t gateway,
unsigned int priority)
{
struct list_head *e;
lnet_remotenet_t *rnet;
@ -311,8 +312,8 @@ lnet_add_route (__u32 net, unsigned int hops, lnet_nid_t gateway)
int add_route;
int rc;
CDEBUG(D_NET, "Add route: net %s hops %u gw %s\n",
libcfs_net2str(net), hops, libcfs_nid2str(gateway));
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 ||
@ -342,6 +343,7 @@ lnet_add_route (__u32 net, unsigned int hops, lnet_nid_t gateway)
rnet->lrn_net = net;
route->lr_hops = hops;
route->lr_net = net;
route->lr_priority = priority;
lnet_net_lock(LNET_LOCK_EX);
@ -552,7 +554,7 @@ lnet_destroy_routes (void)
int
lnet_get_route(int idx, __u32 *net, __u32 *hops,
lnet_nid_t *gateway, __u32 *alive)
lnet_nid_t *gateway, __u32 *alive, __u32 *priority)
{
struct list_head *e1;
struct list_head *e2;
@ -574,10 +576,11 @@ lnet_get_route(int idx, __u32 *net, __u32 *hops,
lr_list);
if (idx-- == 0) {
*net = rnet->lrn_net;
*hops = route->lr_hops;
*gateway = route->lr_gateway->lp_nid;
*alive = route->lr_gateway->lp_alive;
*net = rnet->lrn_net;
*hops = route->lr_hops;
*priority = route->lr_priority;
*gateway = route->lr_gateway->lp_nid;
*alive = route->lr_gateway->lp_alive;
lnet_net_unlock(cpt);
return 0;
}

16
drivers/staging/lustre/lnet/lnet/router_proc.c
View File

@ -174,8 +174,8 @@ int LL_PROC_PROTO(proc_lnet_routes)
the_lnet.ln_routing ? "enabled" : "disabled");
LASSERT(tmpstr + tmpsiz - s > 0);
s += snprintf(s, tmpstr + tmpsiz - s, "%-8s %4s %7s %s\n",
"net", "hops", "state", "router");
s += snprintf(s, tmpstr + tmpsiz - s, "%-8s %4s %8s %7s %s\n",
"net", "hops", "priority", "state", "router");
LASSERT(tmpstr + tmpsiz - s > 0);
lnet_net_lock(0);
@ -229,14 +229,16 @@ int LL_PROC_PROTO(proc_lnet_routes)
}
if (route != NULL) {
__u32 net = rnet->lrn_net;
unsigned int hops = route->lr_hops;
lnet_nid_t nid = route->lr_gateway->lp_nid;
int alive = route->lr_gateway->lp_alive;
__u32 net = rnet->lrn_net;
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;
s += snprintf(s, tmpstr + tmpsiz - s,
"%-8s %4u %7s %s\n",
"%-8s %4u %8u %7s %s\n",
libcfs_net2str(net), hops,
priority,
alive ? "up" : "down",
libcfs_nid2str(nid));
LASSERT(tmpstr + tmpsiz - s > 0);