diff options
| author |   Coly Li <colyli@suse.de> | 2020-02-01 22:42:35 +0800 |
|---|---|---|
| committer |   Jens Axboe <axboe@kernel.dk> | 2020-02-01 07:55:39 -0700 |
| commit | 49d08d596e85f39ded48e85df362827cbab1f5ae (patch) | |
| tree | 7e88c0de2e2898cfba9d41fede5424825d2b67b3 /drivers/md | |
| parent | bcache: fix incorrect data type usage in btree_flush_write() (diff) | |
| download | linux-dev-49d08d596e85f39ded48e85df362827cbab1f5ae.tar.xz linux-dev-49d08d596e85f39ded48e85df362827cbab1f5ae.zip | |
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.c | 21 |
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 |