This has 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@xxxxxxxxxx>
---
drivers/target/target_core_iblock.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/drivers/target/target_core_iblock.c b/drivers/target/target_core_iblock.c
index 3a191bc35e04..afcd62f81d20 100644
--- a/drivers/target/target_core_iblock.c
+++ b/drivers/target/target_core_iblock.c
@@ -147,6 +147,8 @@ 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;
@@ -762,6 +764,9 @@ 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;
--
2.34.1
