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nbd: add a reconfigure netlink command

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We want to be able to reconnect dead connections to existing block
devices, so add a reconfigure netlink command.  We will also allow users
to change their timeout on the fly, but everything else will require a
disconnect and reconnect.  You won't be able to add more connections
either, simply replace dead connections with new more lively
connections.

Signed-off-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: Jens Axboe <axboe@fb.com>
This commit is contained in:
Josef Bacik 2017-04-06 17:02:01 -04:00 • committed by Jens Axboe
parent e46c7287b1
commit b7aa3d3938
2 changed files with 142 additions and 0 deletions
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1
include/uapi/linux/nbd-netlink.h
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@ -62,6 +62,7 @@ enum {
NBD_CMD_UNSPEC,
NBD_CMD_CONNECT,
NBD_CMD_DISCONNECT,
NBD_CMD_RECONFIGURE,
__NBD_CMD_MAX,
};
#define NBD_CMD_MAX (__NBD_CMD_MAX - 1)