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lightnvm: pblk: check read lba on gc path

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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>
This commit is contained in:
Javier González 2018-06-01 15:04:17 +02:00 committed by Jens Axboe
parent 1d8b33e05c
commit 310df58229
1 changed files with 33 additions and 6 deletions
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39
drivers/lightnvm/pblk-read.c
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@ -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) {