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vduse-blk: Add name option

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Currently we use 'id' option as the name of VDUSE device.
It's a bit confusing since we use one value for two different
purposes: the ID to identfy the export within QEMU (must be
distinct from any other exports in the same QEMU process, but
can overlap with names used by other processes), and the VDUSE
name to uniquely identify it on the host (must be distinct from
other VDUSE devices on the same host, but can overlap with other
export types like NBD in the same process). To make it clear,
this patch adds a separate 'name' option to specify the VDUSE
name for the vduse-blk export instead.

Signed-off-by: Xie Yongji <xieyongji@bytedance.com>
Message-Id: <20220614051532.92-7-xieyongji@bytedance.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Xie Yongji
2022-06-14 13:15:32 +08:00
committed by Kevin Wolf
parent 0862a087fd
commit 779d82e1d3
4 changed files with 13 additions and 11 deletions
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8
storage-daemon/qemu-storage-daemon.c
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@@ -123,12 +123,12 @@ static void help(void)
#endif /* CONFIG_VHOST_USER_BLK_SERVER */
#ifdef CONFIG_VDUSE_BLK_EXPORT
" --export [type=]vduse-blk,id=<id>,node-name=<node-name>\n"
" [,writable=on|off][,num-queues=<num-queues>]\n"
" [,queue-size=<queue-size>]\n"
" ,name=<vduse-name>[,writable=on|off]\n"
" [,num-queues=<num-queues>][,queue-size=<queue-size>]\n"
" [,logical-block-size=<logical-block-size>]\n"
" [,serial=<serial-number>]\n"
" export the specified block node as a vduse-blk\n"
" device using the id as the VDUSE device name\n"
" export the specified block node as a\n"
" vduse-blk device\n"
"\n"
#endif /* CONFIG_VDUSE_BLK_EXPORT */
" --monitor [chardev=]name[,mode=control][,pretty[=on|off]]\n"