From 8e62d8f4b159ae80b4db5b5e46db0c5fec58c4a2 Mon Sep 17 00:00:00 2001 From: Mike Christie Date: Mon, 20 Oct 2025 10:38:20 +0000 Subject: [PATCH] scsi: target: Add atomic support to target_core_iblock 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 Signed-off-by: John Garry Reviewed-by: John Garry Link: https://patch.msgid.link/20251020103820.2917593-8-john.g.garry@oracle.com Signed-off-by: Martin K. Petersen --- 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 281612b9830f8..8ec7b534ad760 100644 --- a/drivers/target/target_core_iblock.c +++ b/drivers/target/target_core_iblock.c @@ -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; -- 2.47.3