diff options
| author | Josef Bacik <josef@toxicpanda.com> | 2017-04-06 17:02:07 -0400 |
|---|---|---|
| committer | Jens Axboe <axboe@fb.com> | 2017-04-17 09:58:42 -0600 |
| commit | a2c97909f97ef32b76e856572fba4f77e1885fe6 (patch) | |
| tree | 93693ce1eb0141806a19c307b92b6d5e11bbab0e /include | |
| parent | c6a4759ea0c9a7e7661f34f6943dafb1c6ae1b1c (diff) | |
nbd: add a flag to destroy an nbd device on disconnect
For ease of management it would be nice for users to specify that the
device node for a nbd device is destroyed once it is disconnected and
there are no more users. Add a client flag and enable this operation to
happen.
Signed-off-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/uapi/linux/nbd.h | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/include/uapi/linux/nbd.h b/include/uapi/linux/nbd.h index c91c642ea900..155e33f81913 100644 --- a/include/uapi/linux/nbd.h +++ b/include/uapi/linux/nbd.h @@ -37,7 +37,7 @@ enum { NBD_CMD_TRIM = 4 }; -/* values for flags field */ +/* values for flags field, these are server interaction specific. */ #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 */ @@ -45,6 +45,10 @@ enum { #define NBD_FLAG_SEND_TRIM (1 << 5) /* send trim/discard */ #define NBD_FLAG_CAN_MULTI_CONN (1 << 8) /* Server supports multiple connections per export. */ +/* These are client behavior specific flags. */ +#define NBD_CFLAG_DESTROY_ON_DISCONNECT (1 << 0) /* delete the nbd device on + disconnect. */ + /* userspace doesn't need the nbd_device structure */ /* These are sent over the network in the request/reply magic fields */ |