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| author |   Shaun McDowell <shaunjmcdowell@gmail.com> | 2017-05-25 23:55:54 -0400 |
|---|---|---|
| committer |   Jens Axboe <axboe@fb.com> | 2017-05-30 08:20:25 -0600 |
| commit | 685c9b24ad5090e7a74781c4784fc12e0a04a176 (patch) | |
| tree | 76b566b20b4629798098ed02242dc0f61ff9a0eb /include/uapi/linux/nbd.h | |
| parent | blk-mq: make per-sw-queue bio merge as default .bio_merge (diff) | |
| download | linux-dev-685c9b24ad5090e7a74781c4784fc12e0a04a176.tar.xz linux-dev-685c9b24ad5090e7a74781c4784fc12e0a04a176.zip | |
nbd: add FUA op support
NBD userland client and server have FUA (forced unit access) support
and flags defined. Make NBD kernel module recognize NBD_FLAG_SEND_FUA,
enable FUA on the queue, and forward FUA requests to the server.
Signed-off-by: Shaun McDowell <shaunjmcdowell@gmail.com>
Reviewed-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to '')
| -rw-r--r-- | include/uapi/linux/nbd.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/uapi/linux/nbd.h b/include/uapi/linux/nbd.h index 155e33f81913..a50527ebf671 100644 --- a/include/uapi/linux/nbd.h +++ b/include/uapi/linux/nbd.h @@ -41,10 +41,14 @@ enum { #define NBD_FLAG_HAS_FLAGS (1 << 0) /* nbd-server supports flags */ #define NBD_FLAG_READ_ONLY (1 << 1) /* device is read-only */ #define NBD_FLAG_SEND_FLUSH (1 << 2) /* can flush writeback cache */ +#define NBD_FLAG_SEND_FUA (1 << 3) /* send FUA (forced unit access) */ /* there is a gap here to match userspace */ #define NBD_FLAG_SEND_TRIM (1 << 5) /* send trim/discard */ #define NBD_FLAG_CAN_MULTI_CONN (1 << 8) /* Server supports multiple connections per export. */ +/* values for cmd flags in the upper 16 bits of request type */ +#define NBD_CMD_FLAG_FUA (1 << 16) /* FUA (forced unit access) op */ + /* These are client behavior specific flags. */ #define NBD_CFLAG_DESTROY_ON_DISCONNECT (1 << 0) /* delete the nbd device on disconnect. */ |