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path: root/drivers/md/bcache/super.c
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Diffstat (limited to 'drivers/md/bcache/super.c')
-rw-r--r--drivers/md/bcache/super.c29
1 files changed, 22 insertions, 7 deletions
diff --git a/drivers/md/bcache/super.c b/drivers/md/bcache/super.c
index 312895788036..f2273143b3cb 100644
--- a/drivers/md/bcache/super.c
+++ b/drivers/md/bcache/super.c
@@ -963,6 +963,7 @@ int bch_cached_dev_attach(struct cached_dev *dc, struct cache_set *c,
uint32_t rtime = cpu_to_le32(get_seconds());
struct uuid_entry *u;
char buf[BDEVNAME_SIZE];
+ struct cached_dev *exist_dc, *t;
bdevname(dc->bdev, buf);
@@ -987,6 +988,16 @@ int bch_cached_dev_attach(struct cached_dev *dc, struct cache_set *c,
return -EINVAL;
}
+ /* Check whether already attached */
+ list_for_each_entry_safe(exist_dc, t, &c->cached_devs, list) {
+ if (!memcmp(dc->sb.uuid, exist_dc->sb.uuid, 16)) {
+ pr_err("Tried to attach %s but duplicate UUID already attached",
+ buf);
+
+ return -EINVAL;
+ }
+ }
+
u = uuid_find(c, dc->sb.uuid);
if (u &&
@@ -1204,7 +1215,7 @@ static void register_bdev(struct cache_sb *sb, struct page *sb_page,
return;
err:
- pr_notice("error opening %s: %s", bdevname(bdev, name), err);
+ pr_notice("error %s: %s", bdevname(bdev, name), err);
bcache_device_stop(&dc->disk);
}
@@ -1274,7 +1285,7 @@ static int flash_devs_run(struct cache_set *c)
struct uuid_entry *u;
for (u = c->uuids;
- u < c->uuids + c->devices_max_used && !ret;
+ u < c->uuids + c->nr_uuids && !ret;
u++)
if (UUID_FLASH_ONLY(u))
ret = flash_dev_run(c, u);
@@ -1883,6 +1894,8 @@ static int register_cache(struct cache_sb *sb, struct page *sb_page,
const char *err = NULL; /* must be set for any error case */
int ret = 0;
+ bdevname(bdev, name);
+
memcpy(&ca->sb, sb, sizeof(struct cache_sb));
ca->bdev = bdev;
ca->bdev->bd_holder = ca;
@@ -1891,11 +1904,12 @@ static int register_cache(struct cache_sb *sb, struct page *sb_page,
bio_first_bvec_all(&ca->sb_bio)->bv_page = sb_page;
get_page(sb_page);
- if (blk_queue_discard(bdev_get_queue(ca->bdev)))
+ if (blk_queue_discard(bdev_get_queue(bdev)))
ca->discard = CACHE_DISCARD(&ca->sb);
ret = cache_alloc(ca);
if (ret != 0) {
+ blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL);
if (ret == -ENOMEM)
err = "cache_alloc(): -ENOMEM";
else
@@ -1918,14 +1932,14 @@ static int register_cache(struct cache_sb *sb, struct page *sb_page,
goto out;
}
- pr_info("registered cache device %s", bdevname(bdev, name));
+ pr_info("registered cache device %s", name);
out:
kobject_put(&ca->kobj);
err:
if (err)
- pr_notice("error opening %s: %s", bdevname(bdev, name), err);
+ pr_notice("error %s: %s", name, err);
return ret;
}
@@ -2014,6 +2028,7 @@ static ssize_t register_bcache(struct kobject *k, struct kobj_attribute *attr,
if (err)
goto err_close;
+ err = "failed to register device";
if (SB_IS_BDEV(sb)) {
struct cached_dev *dc = kzalloc(sizeof(*dc), GFP_KERNEL);
if (!dc)
@@ -2028,7 +2043,7 @@ static ssize_t register_bcache(struct kobject *k, struct kobj_attribute *attr,
goto err_close;
if (register_cache(sb, sb_page, bdev, ca) != 0)
- goto err_close;
+ goto err;
}
out:
if (sb_page)
@@ -2041,7 +2056,7 @@ out:
err_close:
blkdev_put(bdev, FMODE_READ|FMODE_WRITE|FMODE_EXCL);
err:
- pr_info("error opening %s: %s", path, err);
+ pr_info("error %s: %s", path, err);
ret = -EINVAL;
goto out;
}