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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>
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@ -113,15 +113,14 @@ static int pblk_submit_read_io(struct pblk *pblk, struct nvm_rq *rqd)
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return NVM_IO_OK;
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}
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static void pblk_read_check(struct pblk *pblk, struct nvm_rq *rqd,
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sector_t blba)
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static void pblk_read_check_seq(struct pblk *pblk, void *meta_list,
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sector_t blba, int nr_lbas)
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{
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struct pblk_sec_meta *meta_list = rqd->meta_list;
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int nr_lbas = rqd->nr_ppas;
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struct pblk_sec_meta *meta_lba_list = meta_list;
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int i;
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for (i = 0; i < nr_lbas; i++) {
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u64 lba = le64_to_cpu(meta_list[i].lba);
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u64 lba = le64_to_cpu(meta_lba_list[i].lba);
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if (lba == ADDR_EMPTY)
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continue;
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@ -130,6 +129,32 @@ static void pblk_read_check(struct pblk *pblk, struct nvm_rq *rqd,
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}
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}
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/*
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* There can be holes in the lba list.
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*/
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static void pblk_read_check_rand(struct pblk *pblk, void *meta_list,
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u64 *lba_list, int nr_lbas)
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{
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struct pblk_sec_meta *meta_lba_list = meta_list;
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int i, j;
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for (i = 0, j = 0; i < nr_lbas; i++) {
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u64 lba = lba_list[i];
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u64 meta_lba;
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if (lba == ADDR_EMPTY)
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continue;
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meta_lba = le64_to_cpu(meta_lba_list[j++].lba);
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if (lba != meta_lba) {
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pr_err("pblk: corrupted read LBA (%llu/%llu)\n",
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lba, meta_lba);
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WARN_ON(1);
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}
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}
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}
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static void pblk_read_put_rqd_kref(struct pblk *pblk, struct nvm_rq *rqd)
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{
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struct ppa_addr *ppa_list;
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@ -172,7 +197,7 @@ static void __pblk_end_io_read(struct pblk *pblk, struct nvm_rq *rqd,
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WARN_ONCE(bio->bi_status, "pblk: corrupted read error\n");
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#endif
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pblk_read_check(pblk, rqd, r_ctx->lba);
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pblk_read_check_seq(pblk, rqd->meta_list, r_ctx->lba, rqd->nr_ppas);
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bio_put(bio);
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if (r_ctx->private)
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@ -585,6 +610,8 @@ int pblk_submit_read_gc(struct pblk *pblk, struct pblk_gc_rq *gc_rq)
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goto err_free_bio;
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}
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pblk_read_check_rand(pblk, rqd.meta_list, gc_rq->lba_list, rqd.nr_ppas);
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atomic_dec(&pblk->inflight_io);
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if (rqd.error) {
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