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authorColy Li <colyli@suse.de>2020-02-01 22:42:35 +0800
committerJens Axboe <axboe@kernel.dk>2020-02-01 07:55:39 -0700
commit49d08d596e85f39ded48e85df362827cbab1f5ae (patch)
tree7e88c0de2e2898cfba9d41fede5424825d2b67b3 /drivers/md
parentd1c3cc34f5a78b38d2b809b289d912c3560545df (diff)
bcache: check return value of prio_read()
Now if prio_read() failed during starting a cache set, we can print out error message in run_cache_set() and handle the failure properly. Signed-off-by: Coly Li <colyli@suse.de> Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'drivers/md')
-rw-r--r--drivers/md/bcache/super.c21
1 files changed, 16 insertions, 5 deletions
diff --git a/drivers/md/bcache/super.c b/drivers/md/bcache/super.c
index 3dea1d5acd5c..2749daf09724 100644
--- a/drivers/md/bcache/super.c
+++ b/drivers/md/bcache/super.c
@@ -609,12 +609,13 @@ int bch_prio_write(struct cache *ca, bool wait)
return 0;
}
-static void prio_read(struct cache *ca, uint64_t bucket)
+static int prio_read(struct cache *ca, uint64_t bucket)
{
struct prio_set *p = ca->disk_buckets;
struct bucket_disk *d = p->data + prios_per_bucket(ca), *end = d;
struct bucket *b;
unsigned int bucket_nr = 0;
+ int ret = -EIO;
for (b = ca->buckets;
b < ca->buckets + ca->sb.nbuckets;
@@ -627,11 +628,15 @@ static void prio_read(struct cache *ca, uint64_t bucket)
prio_io(ca, bucket, REQ_OP_READ, 0);
if (p->csum !=
- bch_crc64(&p->magic, bucket_bytes(ca) - 8))
+ bch_crc64(&p->magic, bucket_bytes(ca) - 8)) {
pr_warn("bad csum reading priorities");
+ goto out;
+ }
- if (p->magic != pset_magic(&ca->sb))
+ if (p->magic != pset_magic(&ca->sb)) {
pr_warn("bad magic reading priorities");
+ goto out;
+ }
bucket = p->next_bucket;
d = p->data;
@@ -640,6 +645,10 @@ static void prio_read(struct cache *ca, uint64_t bucket)
b->prio = le16_to_cpu(d->prio);
b->gen = b->last_gc = d->gen;
}
+
+ ret = 0;
+out:
+ return ret;
}
/* Bcache device */
@@ -1873,8 +1882,10 @@ static int run_cache_set(struct cache_set *c)
j = &list_entry(journal.prev, struct journal_replay, list)->j;
err = "IO error reading priorities";
- for_each_cache(ca, c, i)
- prio_read(ca, j->prio_bucket[ca->sb.nr_this_dev]);
+ for_each_cache(ca, c, i) {
+ if (prio_read(ca, j->prio_bucket[ca->sb.nr_this_dev]))
+ goto err;
+ }
/*
* If prio_read() fails it'll call cache_set_error and we'll