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scsi: target: Add atomic support to target_core_iblock

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Make target_core_iblock use the LIO helper function to translate its
block_device atomic settings to LIO settings. If we then get a write
that LIO has indicated is atomic via the SCF_ATOMIC flag, we use the
REQ_ATOMIC flag to tell the block layer to perform an atomic write.

Signed-off-by: Mike Christie <michael.christie@oracle.com>
Signed-off-by: John Garry <john.g.garry@oracle.com>
Reviewed-by: John Garry <john.g.garry@oracle.com>
Link: https://patch.msgid.link/20251020103820.2917593-8-john.g.garry@oracle.com
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Mike Christie
2025-10-20 10:38:20 +00:00
committed by Martin K. Petersen
parent 2d9668883b
commit 8e62d8f4b1
1 changed files with 5 additions and 0 deletions
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5
drivers/target/target_core_iblock.c
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@@ -152,6 +152,8 @@ static int iblock_configure_device(struct se_device *dev)
if (bdev_nonrot(bd))
dev->dev_attrib.is_nonrot = 1;
target_configure_write_atomic_from_bdev(&dev->dev_attrib, bd);
bi = bdev_get_integrity(bd);
if (!bi)
return 0;
@@ -773,6 +775,9 @@ iblock_execute_rw(struct se_cmd *cmd, struct scatterlist *sgl, u32 sgl_nents,
else if (!bdev_write_cache(ib_dev->ibd_bd))
opf |= REQ_FUA;
}
if (cmd->se_cmd_flags & SCF_ATOMIC)
opf |= REQ_ATOMIC;
} else {
opf = REQ_OP_READ;
miter_dir = SG_MITER_FROM_SG;