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Diffstat (limited to 'drivers/md')
-rw-r--r--drivers/md/dm-mpath.c42
1 files changed, 36 insertions, 6 deletions
diff --git a/drivers/md/dm-mpath.c b/drivers/md/dm-mpath.c
index 6f0d90d4a54..32d0b878ecc 100644
--- a/drivers/md/dm-mpath.c
+++ b/drivers/md/dm-mpath.c
@@ -64,6 +64,7 @@ struct multipath {
spinlock_t lock;
const char *hw_handler_name;
+ char *hw_handler_params;
unsigned nr_priority_groups;
struct list_head priority_groups;
unsigned pg_init_required; /* pg_init needs calling? */
@@ -219,6 +220,7 @@ static void free_multipath(struct multipath *m)
}
kfree(m->hw_handler_name);
+ kfree(m->hw_handler_params);
mempool_destroy(m->mpio_pool);
kfree(m);
}
@@ -615,6 +617,17 @@ static struct pgpath *parse_path(struct arg_set *as, struct path_selector *ps,
dm_put_device(ti, p->path.dev);
goto bad;
}
+
+ if (m->hw_handler_params) {
+ r = scsi_dh_set_params(q, m->hw_handler_params);
+ if (r < 0) {
+ ti->error = "unable to set hardware "
+ "handler parameters";
+ scsi_dh_detach(q);
+ dm_put_device(ti, p->path.dev);
+ goto bad;
+ }
+ }
}
r = ps->type->add_path(ps, &p->path, as->argc, as->argv, &ti->error);
@@ -705,6 +718,7 @@ static struct priority_group *parse_priority_group(struct arg_set *as,
static int parse_hw_handler(struct arg_set *as, struct multipath *m)
{
unsigned hw_argc;
+ int ret;
struct dm_target *ti = m->ti;
static struct param _params[] = {
@@ -726,17 +740,33 @@ static int parse_hw_handler(struct arg_set *as, struct multipath *m)
request_module("scsi_dh_%s", m->hw_handler_name);
if (scsi_dh_handler_exist(m->hw_handler_name) == 0) {
ti->error = "unknown hardware handler type";
- kfree(m->hw_handler_name);
- m->hw_handler_name = NULL;
- return -EINVAL;
+ ret = -EINVAL;
+ goto fail;
}
- if (hw_argc > 1)
- DMWARN("Ignoring user-specified arguments for "
- "hardware handler \"%s\"", m->hw_handler_name);
+ if (hw_argc > 1) {
+ char *p;
+ int i, j, len = 4;
+
+ for (i = 0; i <= hw_argc - 2; i++)
+ len += strlen(as->argv[i]) + 1;
+ p = m->hw_handler_params = kzalloc(len, GFP_KERNEL);
+ if (!p) {
+ ti->error = "memory allocation failed";
+ ret = -ENOMEM;
+ goto fail;
+ }
+ j = sprintf(p, "%d", hw_argc - 1);
+ for (i = 0, p+=j+1; i <= hw_argc - 2; i++, p+=j+1)
+ j = sprintf(p, "%s", as->argv[i]);
+ }
consume(as, hw_argc - 1);
return 0;
+fail:
+ kfree(m->hw_handler_name);
+ m->hw_handler_name = NULL;
+ return ret;
}
static int parse_features(struct arg_set *as, struct multipath *m)