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lightnvm: pblk: refactor emeta consistency check 

Currently pblk_recov_get_lba list does two separate things:
it checks the consistency of the emeta and extracts the lba list.

This patch separates the consistency check to make the code easier
to read and to prepare for version checks of the line emeta
persistent data format version.

Signed-off-by: Hans Holmberg <hans.holmberg@cnexlabs.com>
Signed-off-by: Javier González <javier@cnexlabs.com>
Signed-off-by: Matias Bjørling <m@bjorling.me>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Hans Holmberg 2018-01-05 14:16:08 +01:00 committed by Jens Axboe
parent d6d3ec2a3b
commit 06bc072b3f
3 changed files with 19 additions and 7 deletions
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9
drivers/lightnvm/pblk-gc.c
View File

@ -169,7 +169,14 @@ static void pblk_gc_line_prepare_ws(struct work_struct *work)
* the line untouched. TODO: Implement a recovery routine that scans and
* moves all sectors on the line.
*/
lba_list = pblk_recov_get_lba_list(pblk, emeta_buf);
ret = pblk_recov_check_emeta(pblk, emeta_buf);
if (ret) {
pr_err("pblk: inconsistent emeta (line %d)\n", line->id);
goto fail_free_emeta;
}
lba_list = emeta_to_lbas(pblk, emeta_buf);
if (!lba_list) {
pr_err("pblk: could not interpret emeta (line %d)\n", line->id);
goto fail_free_emeta;

15
drivers/lightnvm/pblk-recovery.c
View File

@ -111,18 +111,18 @@ int pblk_recov_setup_rq(struct pblk *pblk, struct pblk_c_ctx *c_ctx,
return 0;
}
__le64 *pblk_recov_get_lba_list(struct pblk *pblk, struct line_emeta *emeta_buf)
int pblk_recov_check_emeta(struct pblk *pblk, struct line_emeta *emeta_buf)
{
u32 crc;
crc = pblk_calc_emeta_crc(pblk, emeta_buf);
if (le32_to_cpu(emeta_buf->crc) != crc)
return NULL;
return 1;
if (le32_to_cpu(emeta_buf->header.identifier) != PBLK_MAGIC)
return NULL;
return 1;
return emeta_to_lbas(pblk, emeta_buf);
return 0;
}
static int pblk_recov_l2p_from_emeta(struct pblk *pblk, struct pblk_line *line)
@ -137,7 +137,7 @@ static int pblk_recov_l2p_from_emeta(struct pblk *pblk, struct pblk_line *line)
u64 nr_valid_lbas, nr_lbas = 0;
u64 i;
lba_list = pblk_recov_get_lba_list(pblk, emeta_buf);
lba_list = emeta_to_lbas(pblk, emeta_buf);
if (!lba_list)
return 1;
@ -938,6 +938,11 @@ struct pblk_line *pblk_recov_l2p(struct pblk *pblk)
goto next;
}
if (pblk_recov_check_emeta(pblk, line->emeta->buf)) {
pblk_recov_l2p_from_oob(pblk, line);
goto next;
}
if (pblk_recov_l2p_from_emeta(pblk, line))
pblk_recov_l2p_from_oob(pblk, line);

2
drivers/lightnvm/pblk.h
View File

@ -808,7 +808,7 @@ int pblk_submit_read_gc(struct pblk *pblk, struct pblk_gc_rq *gc_rq);
void pblk_submit_rec(struct work_struct *work);
struct pblk_line *pblk_recov_l2p(struct pblk *pblk);
int pblk_recov_pad(struct pblk *pblk);
__le64 *pblk_recov_get_lba_list(struct pblk *pblk, struct line_emeta *emeta);
int pblk_recov_check_emeta(struct pblk *pblk, struct line_emeta *emeta);
int pblk_recov_setup_rq(struct pblk *pblk, struct pblk_c_ctx *c_ctx,
struct pblk_rec_ctx *recovery, u64 *comp_bits,
unsigned int comp);