diff options
Diffstat (limited to 'drivers/md/bcache/request.c')
| -rw-r--r-- | drivers/md/bcache/request.c | 22 |
1 files changed, 20 insertions, 2 deletions
diff --git a/drivers/md/bcache/request.c b/drivers/md/bcache/request.c index cce02f19e6c7..fcdb59f9ca91 100644 --- a/drivers/md/bcache/request.c +++ b/drivers/md/bcache/request.c @@ -255,6 +255,24 @@ static void bch_data_insert_keys(struct closure *cl) closure_return(cl); } +static int bch_keylist_realloc(struct keylist *l, unsigned u64s, + struct cache_set *c) +{ + size_t oldsize = bch_keylist_nkeys(l); + size_t newsize = oldsize + u64s; + + /* + * The journalling code doesn't handle the case where the keys to insert + * is bigger than an empty write: If we just return -ENOMEM here, + * bio_insert() and bio_invalidate() will insert the keys created so far + * and finish the rest when the keylist is empty. + */ + if (newsize * sizeof(uint64_t) > block_bytes(c) - sizeof(struct jset)) + return -ENOMEM; + + return __bch_keylist_realloc(l, u64s); +} + static void bch_data_invalidate(struct closure *cl) { struct data_insert_op *op = container_of(cl, struct data_insert_op, cl); @@ -267,7 +285,7 @@ static void bch_data_invalidate(struct closure *cl) unsigned sectors = min(bio_sectors(bio), 1U << (KEY_SIZE_BITS - 1)); - if (bch_keylist_realloc(&op->insert_keys, 0, op->c)) + if (bch_keylist_realloc(&op->insert_keys, 2, op->c)) goto out; bio->bi_iter.bi_sector += sectors; @@ -357,7 +375,7 @@ static void bch_data_insert_start(struct closure *cl) /* 1 for the device pointer and 1 for the chksum */ if (bch_keylist_realloc(&op->insert_keys, - 1 + (op->csum ? 1 : 0), + 3 + (op->csum ? 1 : 0), op->c)) continue_at(cl, bch_data_insert_keys, bcache_wq); |