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/*
* Copyright (c) 2004, 2005 Christophe Varoqui
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "checkers.h"
#include "util.h"
#include "memory.h"
#include "vector.h"
#include "structs.h"
#include "pgpolicies.h"
extern int
get_pgpolicy_id (char * str)
{
if (0 == strncmp(str, "failover", 8))
return FAILOVER;
if (0 == strncmp(str, "multibus", 8))
return MULTIBUS;
if (0 == strncmp(str, "group_by_serial", 15))
return GROUP_BY_SERIAL;
if (0 == strncmp(str, "group_by_prio", 13))
return GROUP_BY_PRIO;
if (0 == strncmp(str, "group_by_node_name", 18))
return GROUP_BY_NODE_NAME;
return -1;
}
extern int
get_pgpolicy_name (char * buff, int len, int id)
{
char * s;
switch (id) {
case FAILOVER:
s = "failover";
break;
case MULTIBUS:
s = "multibus";
break;
case GROUP_BY_SERIAL:
s = "group_by_serial";
break;
case GROUP_BY_PRIO:
s = "group_by_prio";
break;
case GROUP_BY_NODE_NAME:
s = "group_by_node_name";
break;
default:
s = "undefined";
break;
}
return snprintf(buff, POLICY_NAME_SIZE, "%s", s);
}
/*
* One path group per unique tgt_node_name present in the path vector
*/
extern int
group_by_node_name (struct multipath * mp) {
int i, j;
int * bitmap;
struct path * pp;
struct pathgroup * pgp;
struct path * pp2;
if (!mp->pg)
mp->pg = vector_alloc();
if (!mp->pg)
return 1;
/* init the bitmap */
bitmap = (int *)MALLOC(VECTOR_SIZE(mp->paths) * sizeof (int));
if (!bitmap)
goto out;
for (i = 0; i < VECTOR_SIZE(mp->paths); i++) {
if (bitmap[i])
continue;
pp = VECTOR_SLOT(mp->paths, i);
/* here, we really got a new pg */
pgp = alloc_pathgroup();
if (!pgp)
goto out1;
if (store_pathgroup(mp->pg, pgp))
goto out1;
/* feed the first path */
if (store_path(pgp->paths, pp))
goto out1;
bitmap[i] = 1;
for (j = i + 1; j < VECTOR_SIZE(mp->paths); j++) {
if (bitmap[j])
continue;
pp2 = VECTOR_SLOT(mp->paths, j);
if (!strncmp(pp->tgt_node_name, pp2->tgt_node_name,
NODE_NAME_SIZE)) {
if (store_path(pgp->paths, pp2))
goto out1;
bitmap[j] = 1;
}
}
}
FREE(bitmap);
free_pathvec(mp->paths, KEEP_PATHS);
mp->paths = NULL;
return 0;
out1:
FREE(bitmap);
out:
free_pgvec(mp->pg, KEEP_PATHS);
mp->pg = NULL;
return 1;
}
/*
* One path group per unique serial number present in the path vector
*/
extern int
group_by_serial (struct multipath * mp) {
int i, j;
int * bitmap;
struct path * pp;
struct pathgroup * pgp;
struct path * pp2;
if (!mp->pg)
mp->pg = vector_alloc();
if (!mp->pg)
return 1;
/* init the bitmap */
bitmap = (int *)MALLOC(VECTOR_SIZE(mp->paths) * sizeof (int));
if (!bitmap)
goto out;
for (i = 0; i < VECTOR_SIZE(mp->paths); i++) {
if (bitmap[i])
continue;
pp = VECTOR_SLOT(mp->paths, i);
/* here, we really got a new pg */
pgp = alloc_pathgroup();
if (!pgp)
goto out1;
if (store_pathgroup(mp->pg, pgp))
goto out1;
/* feed the first path */
if (store_path(pgp->paths, pp))
goto out1;
bitmap[i] = 1;
for (j = i + 1; j < VECTOR_SIZE(mp->paths); j++) {
if (bitmap[j])
continue;
pp2 = VECTOR_SLOT(mp->paths, j);
if (0 == strcmp(pp->serial, pp2->serial)) {
if (store_path(pgp->paths, pp2))
goto out1;
bitmap[j] = 1;
}
}
}
FREE(bitmap);
free_pathvec(mp->paths, KEEP_PATHS);
mp->paths = NULL;
return 0;
out1:
FREE(bitmap);
out:
free_pgvec(mp->pg, KEEP_PATHS);
mp->pg = NULL;
return 1;
}
extern int
one_path_per_group (struct multipath * mp)
{
int i;
struct path * pp;
struct pathgroup * pgp;
if (!mp->pg)
mp->pg = vector_alloc();
if (!mp->pg)
return 1;
for (i = 0; i < VECTOR_SIZE(mp->paths); i++) {
pp = VECTOR_SLOT(mp->paths, i);
pgp = alloc_pathgroup();
if (!pgp)
goto out;
if (store_pathgroup(mp->pg, pgp))
goto out;
if (store_path(pgp->paths, pp))
goto out;
}
free_pathvec(mp->paths, KEEP_PATHS);
mp->paths = NULL;
return 0;
out:
free_pgvec(mp->pg, KEEP_PATHS);
mp->pg = NULL;
return 1;
}
extern int
one_group (struct multipath * mp) /* aka multibus */
{
struct pathgroup * pgp;
if (VECTOR_SIZE(mp->paths) < 0)
return 0;
if (!mp->pg)
mp->pg = vector_alloc();
if (!mp->pg)
return 1;
if (VECTOR_SIZE(mp->paths) > 0) {
pgp = alloc_pathgroup();
if (!pgp)
goto out;
vector_free(pgp->paths);
pgp->paths = mp->paths;
mp->paths = NULL;
if (store_pathgroup(mp->pg, pgp))
goto out;
}
return 0;
out:
free_pgvec(mp->pg, KEEP_PATHS);
mp->pg = NULL;
return 1;
}
extern int
group_by_prio (struct multipath * mp)
{
int i;
unsigned int prio;
struct path * pp;
struct pathgroup * pgp;
if (!mp->pg)
mp->pg = vector_alloc();
if (!mp->pg)
return 1;
while (VECTOR_SIZE(mp->paths) > 0) {
pp = VECTOR_SLOT(mp->paths, 0);
prio = pp->priority;
/*
* Find the position to insert the new path group. All groups
* are ordered by the priority value (higher value first).
*/
vector_foreach_slot(mp->pg, pgp, i) {
pp = VECTOR_SLOT(pgp->paths, 0);
if (prio > pp->priority)
break;
}
/*
* Initialize the new path group.
*/
pgp = alloc_pathgroup();
if (!pgp)
goto out;
if (store_path(pgp->paths, VECTOR_SLOT(mp->paths, 0)))
goto out;
vector_del_slot(mp->paths, 0);
/*
* Store the new path group into the vector.
*/
if (i < VECTOR_SIZE(mp->pg)) {
if (!vector_insert_slot(mp->pg, i, pgp))
goto out;
} else {
if (store_pathgroup(mp->pg, pgp))
goto out;
}
/*
* add the other paths with the same prio
*/
vector_foreach_slot(mp->paths, pp, i) {
if (pp->priority == prio) {
if (store_path(pgp->paths, pp))
goto out;
vector_del_slot(mp->paths, i);
i--;
}
}
}
free_pathvec(mp->paths, KEEP_PATHS);
mp->paths = NULL;
return 0;
out:
free_pgvec(mp->pg, KEEP_PATHS);
mp->pg = NULL;
return 1;
}
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