diff options
| author | Javier González <javier@javigon.com> | 2018-06-01 16:04:17 +0300 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2018-06-01 16:43:53 +0300 |
| commit | 310df58229f69382c0c4c9e9003790b71b8a7a55 (patch) | |
| tree | 3b073778d28dfb4d1a8ecdbf6ca8ff0b1dc5e39e /drivers/lightnvm | |
| parent | 1d8b33e05cea69a1b0b7f2f2a7c102b6583a984f (diff) | |
| download | linux-310df58229f69382c0c4c9e9003790b71b8a7a55.tar.xz | |
lightnvm: pblk: check read lba on gc path
Check that the lba stored in the LBA metadata is correct in the GC path
too. This requires a new helper function to check random reads in the
vector read.
Signed-off-by: Javier González <javier@cnexlabs.com>
Signed-off-by: Matias Bjørling <mb@lightnvm.io>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'drivers/lightnvm')
| -rw-r--r-- | drivers/lightnvm/pblk-read.c | 39 |
1 files changed, 33 insertions, 6 deletions
diff --git a/drivers/lightnvm/pblk-read.c b/drivers/lightnvm/pblk-read.c index c844ffb6aead..f3cc61b87a4f 100644 --- a/drivers/lightnvm/pblk-read.c +++ b/drivers/lightnvm/pblk-read.c @@ -113,15 +113,14 @@ static int pblk_submit_read_io(struct pblk *pblk, struct nvm_rq *rqd) return NVM_IO_OK; } -static void pblk_read_check(struct pblk *pblk, struct nvm_rq *rqd, - sector_t blba) +static void pblk_read_check_seq(struct pblk *pblk, void *meta_list, + sector_t blba, int nr_lbas) { - struct pblk_sec_meta *meta_list = rqd->meta_list; - int nr_lbas = rqd->nr_ppas; + struct pblk_sec_meta *meta_lba_list = meta_list; int i; for (i = 0; i < nr_lbas; i++) { - u64 lba = le64_to_cpu(meta_list[i].lba); + u64 lba = le64_to_cpu(meta_lba_list[i].lba); if (lba == ADDR_EMPTY) continue; @@ -130,6 +129,32 @@ static void pblk_read_check(struct pblk *pblk, struct nvm_rq *rqd, } } +/* + * There can be holes in the lba list. + */ +static void pblk_read_check_rand(struct pblk *pblk, void *meta_list, + u64 *lba_list, int nr_lbas) +{ + struct pblk_sec_meta *meta_lba_list = meta_list; + int i, j; + + for (i = 0, j = 0; i < nr_lbas; i++) { + u64 lba = lba_list[i]; + u64 meta_lba; + + if (lba == ADDR_EMPTY) + continue; + + meta_lba = le64_to_cpu(meta_lba_list[j++].lba); + + if (lba != meta_lba) { + pr_err("pblk: corrupted read LBA (%llu/%llu)\n", + lba, meta_lba); + WARN_ON(1); + } + } +} + static void pblk_read_put_rqd_kref(struct pblk *pblk, struct nvm_rq *rqd) { struct ppa_addr *ppa_list; @@ -172,7 +197,7 @@ static void __pblk_end_io_read(struct pblk *pblk, struct nvm_rq *rqd, WARN_ONCE(bio->bi_status, "pblk: corrupted read error\n"); #endif - pblk_read_check(pblk, rqd, r_ctx->lba); + pblk_read_check_seq(pblk, rqd->meta_list, r_ctx->lba, rqd->nr_ppas); bio_put(bio); if (r_ctx->private) @@ -585,6 +610,8 @@ int pblk_submit_read_gc(struct pblk *pblk, struct pblk_gc_rq *gc_rq) goto err_free_bio; } + pblk_read_check_rand(pblk, rqd.meta_list, gc_rq->lba_list, rqd.nr_ppas); + atomic_dec(&pblk->inflight_io); if (rqd.error) { |