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nvmet: add metadata characteristics for a namespace

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Fill those namespace fields from the block device format for adding
metadata (T10-PI) over fabric support with block devices.

Signed-off-by: Israel Rukshin <israelr@mellanox.com>
Signed-off-by: Max Gurtovoy <maxg@mellanox.com>
Reviewed-by: Martin K. Petersen <martin.petersen@oracle.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
This commit is contained in:
Israel Rukshin
2020-05-19 17:05:57 +03:00
committed by Christoph Hellwig
parent 5ec5d3bddc
commit d2d1c454a4
3 changed files with 26 additions and 0 deletions
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22
drivers/nvme/target/io-cmd-bdev.c
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@@ -47,6 +47,22 @@ void nvmet_bdev_set_limits(struct block_device *bdev, struct nvme_id_ns *id)
id->nows = to0based(ql->io_opt / ql->logical_block_size);
}
static void nvmet_bdev_ns_enable_integrity(struct nvmet_ns *ns)
{
struct blk_integrity *bi = bdev_get_integrity(ns->bdev);
if (bi) {
ns->metadata_size = bi->tuple_size;
if (bi->profile == &t10_pi_type1_crc)
ns->pi_type = NVME_NS_DPS_PI_TYPE1;
else if (bi->profile == &t10_pi_type3_crc)
ns->pi_type = NVME_NS_DPS_PI_TYPE3;
else
/* Unsupported metadata type */
ns->metadata_size = 0;
}
}
int nvmet_bdev_ns_enable(struct nvmet_ns *ns)
{
int ret;
@@ -64,6 +80,12 @@ int nvmet_bdev_ns_enable(struct nvmet_ns *ns)
}
ns->size = i_size_read(ns->bdev->bd_inode);
ns->blksize_shift = blksize_bits(bdev_logical_block_size(ns->bdev));
ns->pi_type = 0;
ns->metadata_size = 0;
if (IS_ENABLED(CONFIG_BLK_DEV_INTEGRITY_T10))
nvmet_bdev_ns_enable_integrity(ns);
return 0;
}