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lightnvm: expose gennvm_mark_blk to targets

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Targets can update a block state when having a reference to an
in-memory virtual block. In the case that a target does not keep the
block metadata in memory, it does not have a way to update this
structure.

Therefore, expose gennvm_mark_blk() through the media managers
->mark_blk() callback and let targets update the state structure through
this callback.

Signed-off-by: Matias Bjørling <m@bjorling.me>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Matias Bjørling 2016-05-06 20:03:18 +02:00 committed by Jens Axboe
parent 976bdfcae3
commit 04a8aa173b
2 changed files with 18 additions and 13 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

27
drivers/lightnvm/gennvm.c
View File

@ -407,29 +407,28 @@ static void gennvm_put_blk(struct nvm_dev *dev, struct nvm_block *blk)
spin_unlock(&vlun->lock);
}
static void gennvm_blk_set_type(struct nvm_dev *dev, struct ppa_addr *ppa,
int type)
static void gennvm_mark_blk(struct nvm_dev *dev, struct ppa_addr ppa, int type)
{
struct gen_nvm *gn = dev->mp;
struct gen_lun *lun;
struct nvm_block *blk;
pr_debug("gennvm: ppa (ch: %u lun: %u blk: %u pg: %u) -> %u\n",
ppa->g.ch, ppa->g.lun, ppa->g.blk, ppa->g.pg, type);
ppa.g.ch, ppa.g.lun, ppa.g.blk, ppa.g.pg, type);
if (unlikely(ppa->g.ch > dev->nr_chnls ||
ppa->g.lun > dev->luns_per_chnl ||
ppa->g.blk > dev->blks_per_lun)) {
if (unlikely(ppa.g.ch > dev->nr_chnls ||
ppa.g.lun > dev->luns_per_chnl ||
ppa.g.blk > dev->blks_per_lun)) {
WARN_ON_ONCE(1);
pr_err("gennvm: ppa broken (ch: %u > %u lun: %u > %u blk: %u > %u",
ppa->g.ch, dev->nr_chnls,
ppa->g.lun, dev->luns_per_chnl,
ppa->g.blk, dev->blks_per_lun);
ppa.g.ch, dev->nr_chnls,
ppa.g.lun, dev->luns_per_chnl,
ppa.g.blk, dev->blks_per_lun);
return;
}
lun = &gn->luns[ppa->g.lun * ppa->g.ch];
blk = &lun->vlun.blocks[ppa->g.blk];
lun = &gn->luns[ppa.g.lun * ppa.g.ch];
blk = &lun->vlun.blocks[ppa.g.blk];
/* will be moved to bb list on put_blk from target */
blk->state = type;
@ -448,12 +447,12 @@ static void gennvm_mark_blk_bad(struct nvm_dev *dev, struct nvm_rq *rqd)
/* look up blocks and mark them as bad */
if (rqd->nr_pages == 1) {
gennvm_blk_set_type(dev, &rqd->ppa_addr, NVM_BLK_ST_BAD);
gennvm_mark_blk(dev, rqd->ppa_addr, NVM_BLK_ST_BAD);
return;
}
while ((bit = find_next_bit(comp_bits, max_secs, bit + 1)) < max_secs)
gennvm_blk_set_type(dev, &rqd->ppa_list[bit], NVM_BLK_ST_BAD);
gennvm_mark_blk(dev, rqd->ppa_list[bit], NVM_BLK_ST_BAD);
}
static void gennvm_end_io(struct nvm_rq *rqd)
@ -544,6 +543,8 @@ static struct nvmm_type gennvm = {
.submit_io = gennvm_submit_io,
.erase_blk = gennvm_erase_blk,
.mark_blk = gennvm_mark_blk,
.get_lun = gennvm_get_lun,
.reserve_lun = gennvm_reserve_lun,
.release_lun = gennvm_release_lun,

4
include/linux/lightnvm.h
View File

@ -467,6 +467,7 @@ typedef void (nvmm_flush_blk_fn)(struct nvm_dev *, struct nvm_block *);
typedef int (nvmm_submit_io_fn)(struct nvm_dev *, struct nvm_rq *);
typedef int (nvmm_erase_blk_fn)(struct nvm_dev *, struct nvm_block *,
unsigned long);
typedef void (nvmm_mark_blk_fn)(struct nvm_dev *, struct ppa_addr, int);
typedef struct nvm_lun *(nvmm_get_lun_fn)(struct nvm_dev *, int);
typedef int (nvmm_reserve_lun)(struct nvm_dev *, int);
typedef void (nvmm_release_lun)(struct nvm_dev *, int);
@ -494,6 +495,9 @@ struct nvmm_type {
nvmm_submit_io_fn *submit_io;
nvmm_erase_blk_fn *erase_blk;
/* Bad block mgmt */
nvmm_mark_blk_fn *mark_blk;
/* Configuration management */
nvmm_get_lun_fn *get_lun;
nvmm_reserve_lun *reserve_lun;