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author | Javier González <javier@cnexlabs.com> | 2017-10-13 14:46:13 +0200 |
---|---|---|
committer | Jens Axboe <axboe@kernel.dk> | 2017-10-13 08:34:57 -0600 |
commit | 84454e6de56bb5c8629c41ed09aaf5750ff56f5f (patch) | |
tree | b2dfec1367aa8ca849c103a6b5c5ccfe4386403a /drivers/lightnvm/pblk-read.c | |
parent | 9f6cb13bb40bd9067498e908a3272aba998c0309 (diff) | |
download | linux-84454e6de56bb5c8629c41ed09aaf5750ff56f5f.tar.gz linux-84454e6de56bb5c8629c41ed09aaf5750ff56f5f.tar.bz2 linux-84454e6de56bb5c8629c41ed09aaf5750ff56f5f.zip |
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/pblk-read.c')
-rw-r--r-- | drivers/lightnvm/pblk-read.c | 29 |
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); |