[PATCH 05/21] block: Add REQ_ATOMIC flag
From: John Garry <john.g.garry@oracle.com>
Date: 2023-09-29 10:33:31
Also in:
linux-block, linux-fsdevel, linux-nvme, linux-xfs, lkml
Subsystem:
block layer, the rest · Maintainers:
Jens Axboe, Linus Torvalds
From: Himanshu Madhani <redacted> Add flag REQ_ATOMIC, meaning an atomic operation. This should only be used in conjunction with REQ_OP_WRITE. We will not add a special "request atomic write" operation, as to try to avoid maintenance effort for an operation which is almost the same as REQ_OP_WRITE. Signed-off-by: Himanshu Madhani <redacted> Signed-off-by: John Garry <john.g.garry@oracle.com> --- include/linux/blk_types.h | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/include/linux/blk_types.h b/include/linux/blk_types.h
index d5c5e59ddbd2..4ef5ca64adb4 100644
--- a/include/linux/blk_types.h
+++ b/include/linux/blk_types.h@@ -422,6 +422,7 @@ enum req_flag_bits { __REQ_DRV, /* for driver use */ __REQ_FS_PRIVATE, /* for file system (submitter) use */ + __REQ_ATOMIC, /* for atomic write operations */ /* * Command specific flags, keep last: */
@@ -448,6 +449,7 @@ enum req_flag_bits { #define REQ_RAHEAD (__force blk_opf_t)(1ULL << __REQ_RAHEAD) #define REQ_BACKGROUND (__force blk_opf_t)(1ULL << __REQ_BACKGROUND) #define REQ_NOWAIT (__force blk_opf_t)(1ULL << __REQ_NOWAIT) +#define REQ_ATOMIC (__force blk_opf_t)(1ULL << __REQ_ATOMIC) #define REQ_POLLED (__force blk_opf_t)(1ULL << __REQ_POLLED) #define REQ_ALLOC_CACHE (__force blk_opf_t)(1ULL << __REQ_ALLOC_CACHE) #define REQ_SWAP (__force blk_opf_t)(1ULL << __REQ_SWAP)
--
2.31.1