Messages in this thread Patch in this message | ![/](/images/icornerl.gif) | | From | John Garry <> | Subject | [PATCH v3 05/15] block: Add REQ_ATOMIC flag | Date | Wed, 24 Jan 2024 11:38:31 +0000 |
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From: Himanshu Madhani <himanshu.madhani@oracle.com>
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 <himanshu.madhani@oracle.com> 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 f288c94374b3..cd7cceb8565d 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
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