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| author | Javier González <javier@cnexlabs.com> | 2017-10-13 15:46:22 +0300 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2017-10-13 17:34:57 +0300 |
| commit | a4809fee4e774fdf3296cc69c22ce6e6acef36b2 (patch) | |
| tree | 6d0e2d6834b43dade6027d30f2fda792e00fe132 /drivers/lightnvm/pblk.h | |
| parent | 26532ee52b77185b095d29b54c83386f737a74ba (diff) | |
| download | linux-a4809fee4e774fdf3296cc69c22ce6e6acef36b2.tar.xz | |
lightnvm: pblk: check lba sanity on read path
As part of pblk's recovery scheme, we store the lba mapped to each
physical sector on the device's out-of-bound (OOB) area.
On the read path, we can use this information to validate that the data
being delivered to the upper layers corresponds to the lba being
requested. The cost of this check is an extra copy on the DMA region on
the device and an extra comparison in the host, given that (i) the OOB
area is being read together with the data in the media, and (ii) the DMA
region allocated for the ppa list can be reused for the metadata stored
on the OOB area.
Signed-off-by: Javier González <javier@cnexlabs.com>
Signed-off-by: Matias Bjørling <m@bjorling.me>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'drivers/lightnvm/pblk.h')
| -rw-r--r-- | drivers/lightnvm/pblk.h | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/drivers/lightnvm/pblk.h b/drivers/lightnvm/pblk.h index 12a20f800c26..4a51e6d4d036 100644 --- a/drivers/lightnvm/pblk.h +++ b/drivers/lightnvm/pblk.h @@ -99,6 +99,7 @@ enum { }; #define pblk_dma_meta_size (sizeof(struct pblk_sec_meta) * PBLK_MAX_REQ_ADDRS) +#define pblk_dma_ppa_size (sizeof(u64) * PBLK_MAX_REQ_ADDRS) /* write buffer completion context */ struct pblk_c_ctx { @@ -110,9 +111,10 @@ struct pblk_c_ctx { unsigned int nr_padded; }; -/* generic context */ +/* read context */ struct pblk_g_ctx { void *private; + u64 lba; }; /* Pad context */ |