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lightnvm: pblk: fail gracefully on line alloc. failure 

In the event of a line failing to allocate, fail gracefully and stop the
pipeline to avoid more write failing in the same place.

Signed-off-by: Javier González <javier@cnexlabs.com>
Signed-off-by: Matias Bjørling <mb@lightnvm.io>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Javier González 2018-06-01 15:04:15 +02:00 committed by Jens Axboe
parent 84e92c131a
commit 2deeefc02d
2 changed files with 29 additions and 9 deletions
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5
drivers/lightnvm/pblk-init.c
View File

@ -1047,6 +1047,11 @@ static int pblk_lines_init(struct pblk *pblk)
nr_free_chks += pblk_setup_line_meta(pblk, line, chunk_meta, i);
}
if (!nr_free_chks) {
pr_err("pblk: too many bad blocks prevent for sane instance\n");
return -EINTR;
}
pblk_set_provision(pblk, nr_free_chks);
kfree(chunk_meta);

33
drivers/lightnvm/pblk-map.c
View File

@ -18,11 +18,11 @@
#include "pblk.h"
static void pblk_map_page_data(struct pblk *pblk, unsigned int sentry,
struct ppa_addr *ppa_list,
unsigned long *lun_bitmap,
struct pblk_sec_meta *meta_list,
unsigned int valid_secs)
static int pblk_map_page_data(struct pblk *pblk, unsigned int sentry,
struct ppa_addr *ppa_list,
unsigned long *lun_bitmap,
struct pblk_sec_meta *meta_list,
unsigned int valid_secs)
{
struct pblk_line *line = pblk_line_get_data(pblk);
struct pblk_emeta *emeta;
@ -35,8 +35,14 @@ static void pblk_map_page_data(struct pblk *pblk, unsigned int sentry,
if (pblk_line_is_full(line)) {
struct pblk_line *prev_line = line;
/* If we cannot allocate a new line, make sure to store metadata
* on current line and then fail
*/
line = pblk_line_replace_data(pblk);
pblk_line_close_meta(pblk, prev_line);
if (!line)
return -EINTR;
}
emeta = line->emeta;
@ -74,6 +80,7 @@ static void pblk_map_page_data(struct pblk *pblk, unsigned int sentry,
}
pblk_down_rq(pblk, ppa_list, nr_secs, lun_bitmap);
return 0;
}
void pblk_map_rq(struct pblk *pblk, struct nvm_rq *rqd, unsigned int sentry,
@ -87,8 +94,12 @@ void pblk_map_rq(struct pblk *pblk, struct nvm_rq *rqd, unsigned int sentry,
for (i = off; i < rqd->nr_ppas; i += min) {
map_secs = (i + min > valid_secs) ? (valid_secs % min) : min;
pblk_map_page_data(pblk, sentry + i, &rqd->ppa_list[i],
lun_bitmap, &meta_list[i], map_secs);
if (pblk_map_page_data(pblk, sentry + i, &rqd->ppa_list[i],
lun_bitmap, &meta_list[i], map_secs)) {
bio_put(rqd->bio);
pblk_free_rqd(pblk, rqd, PBLK_WRITE);
pblk_pipeline_stop(pblk);
}
}
}
@ -108,8 +119,12 @@ void pblk_map_erase_rq(struct pblk *pblk, struct nvm_rq *rqd,
for (i = 0; i < rqd->nr_ppas; i += min) {
map_secs = (i + min > valid_secs) ? (valid_secs % min) : min;
pblk_map_page_data(pblk, sentry + i, &rqd->ppa_list[i],
lun_bitmap, &meta_list[i], map_secs);
if (pblk_map_page_data(pblk, sentry + i, &rqd->ppa_list[i],
lun_bitmap, &meta_list[i], map_secs)) {
bio_put(rqd->bio);
pblk_free_rqd(pblk, rqd, PBLK_WRITE);
pblk_pipeline_stop(pblk);
}
erase_lun = pblk_ppa_to_pos(geo, rqd->ppa_list[i]);