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authorJavier González <javier@javigon.com>2018-06-01 15:04:17 +0200
committerJens Axboe <axboe@kernel.dk>2018-06-01 07:43:53 -0600
commit310df58229f69382c0c4c9e9003790b71b8a7a55 (patch)
tree3b073778d28dfb4d1a8ecdbf6ca8ff0b1dc5e39e /drivers/lightnvm
parentlightnvm: pblk: recheck for bad lines at runtime (diff)
downloadlinux-dev-310df58229f69382c0c4c9e9003790b71b8a7a55.tar.xz
linux-dev-310df58229f69382c0c4c9e9003790b71b8a7a55.zip
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.c39
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) {