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authorJavier González <javier@cnexlabs.com>2017-10-13 15:46:13 +0300
committerJens Axboe <axboe@kernel.dk>2017-10-13 17:34:57 +0300
commit84454e6de56bb5c8629c41ed09aaf5750ff56f5f (patch)
treeb2dfec1367aa8ca849c103a6b5c5ccfe4386403a /drivers/lightnvm
parent9f6cb13bb40bd9067498e908a3272aba998c0309 (diff)
downloadlinux-84454e6de56bb5c8629c41ed09aaf5750ff56f5f.tar.xz
lightnvm: pblk: refactor read lba sanity check
Refactor lba sanity check on read path to avoid code duplication. Signed-off-by: Javier González <javier@cnexlabs.com> Signed-off-by: Matias Bjørling <m@bjorling.me> Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'drivers/lightnvm')
-rw-r--r--drivers/lightnvm/pblk-read.c29
1 files changed, 10 insertions, 19 deletions
diff --git a/drivers/lightnvm/pblk-read.c b/drivers/lightnvm/pblk-read.c
index d2b6e2a7d7d5..eaaf9d55ba97 100644
--- a/drivers/lightnvm/pblk-read.c
+++ b/drivers/lightnvm/pblk-read.c
@@ -39,21 +39,14 @@ static int pblk_read_from_cache(struct pblk *pblk, struct bio *bio,
}
static void pblk_read_ppalist_rq(struct pblk *pblk, struct nvm_rq *rqd,
- unsigned long *read_bitmap)
+ sector_t blba, unsigned long *read_bitmap)
{
struct bio *bio = rqd->bio;
struct ppa_addr ppas[PBLK_MAX_REQ_ADDRS];
- sector_t blba = pblk_get_lba(bio);
int nr_secs = rqd->nr_ppas;
bool advanced_bio = false;
int i, j = 0;
- /* logic error: lba out-of-bounds. Ignore read request */
- if (blba + nr_secs >= pblk->rl.nr_secs) {
- WARN(1, "pblk: read lbas out of bounds\n");
- return;
- }
-
pblk_lookup_l2p_seq(pblk, ppas, blba, nr_secs);
for (i = 0; i < nr_secs; i++) {
@@ -259,17 +252,10 @@ err:
}
static void pblk_read_rq(struct pblk *pblk, struct nvm_rq *rqd,
- unsigned long *read_bitmap)
+ sector_t lba, unsigned long *read_bitmap)
{
struct bio *bio = rqd->bio;
struct ppa_addr ppa;
- sector_t lba = pblk_get_lba(bio);
-
- /* logic error: lba out-of-bounds. Ignore read request */
- if (lba >= pblk->rl.nr_secs) {
- WARN(1, "pblk: read lba out of bounds\n");
- return;
- }
pblk_lookup_l2p_seq(pblk, &ppa, lba, 1);
@@ -305,14 +291,19 @@ retry:
int pblk_submit_read(struct pblk *pblk, struct bio *bio)
{
struct nvm_tgt_dev *dev = pblk->dev;
+ sector_t blba = pblk_get_lba(bio);
unsigned int nr_secs = pblk_get_secs(bio);
struct nvm_rq *rqd;
unsigned long read_bitmap; /* Max 64 ppas per request */
unsigned int bio_init_idx;
int ret = NVM_IO_ERR;
- if (nr_secs > PBLK_MAX_REQ_ADDRS)
+ /* logic error: lba out-of-bounds. Ignore read request */
+ if (blba >= pblk->rl.nr_secs || nr_secs > PBLK_MAX_REQ_ADDRS) {
+ WARN(1, "pblk: read lba out of bounds (lba:%llu, nr:%d)\n",
+ (unsigned long long)blba, nr_secs);
return NVM_IO_ERR;
+ }
bitmap_zero(&read_bitmap, nr_secs);
@@ -340,9 +331,9 @@ int pblk_submit_read(struct pblk *pblk, struct bio *bio)
rqd->ppa_list = rqd->meta_list + pblk_dma_meta_size;
rqd->dma_ppa_list = rqd->dma_meta_list + pblk_dma_meta_size;
- pblk_read_ppalist_rq(pblk, rqd, &read_bitmap);
+ pblk_read_ppalist_rq(pblk, rqd, blba, &read_bitmap);
} else {
- pblk_read_rq(pblk, rqd, &read_bitmap);
+ pblk_read_rq(pblk, rqd, blba, &read_bitmap);
}
bio_get(bio);