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lightnvm: pblk: support packed metadata

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pblk performs recovery of open lines by storing the LBA in the per LBA
metadata field. Recovery therefore only works for drives that has this
field.

This patch adds support for packed metadata, which store l2p mapping
for open lines in last sector of every write unit and enables drives
without per IO metadata to recover open lines.

After this patch, drives with OOB size <16B will use packed metadata
and metadata size larger than16B will continue to use the device per
IO metadata.

Reviewed-by: Javier González <javier@cnexlabs.com>
Signed-off-by: Igor Konopko <igor.j.konopko@intel.com>
Signed-off-by: Matias Bjørling <mb@lightnvm.io>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Igor Konopko
2018-12-11 20:16:26 +01:00
committed by Jens Axboe
parent a16816b9e4
commit 55d8ec3539
9 changed files with 122 additions and 20 deletions
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4
drivers/lightnvm/pblk-map.c
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@@ -96,7 +96,7 @@ int pblk_map_rq(struct pblk *pblk, struct nvm_rq *rqd, unsigned int sentry,
unsigned long *lun_bitmap, unsigned int valid_secs,
unsigned int off)
{
void *meta_list = rqd->meta_list;
void *meta_list = pblk_get_meta_for_writes(pblk, rqd);
void *meta_buffer;
struct ppa_addr *ppa_list = nvm_rq_to_ppa_list(rqd);
unsigned int map_secs;
@@ -125,7 +125,7 @@ int pblk_map_erase_rq(struct pblk *pblk, struct nvm_rq *rqd,
struct nvm_tgt_dev *dev = pblk->dev;
struct nvm_geo *geo = &dev->geo;
struct pblk_line_meta *lm = &pblk->lm;
void *meta_list = rqd->meta_list;
void *meta_list = pblk_get_meta_for_writes(pblk, rqd);
void *meta_buffer;
struct ppa_addr *ppa_list = nvm_rq_to_ppa_list(rqd);
struct pblk_line *e_line, *d_line;