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vhost_user_block: Consolidate the vhost-user-block backend syntax

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Rather than repeat syntax for the vhost-user-block backend in multiple
places store it in one place and reference it from the required places.

Signed-off-by: Rob Bradford <robert.bradford@intel.com>
This commit is contained in:
Rob Bradford 2020-05-08 16:11:00 +01:00 committed by Sebastien Boeuf
parent 3220292d45
commit f3f398eb44
3 changed files with 6 additions and 10 deletions
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6
src/bin/vhost_user_blk.rs
View File

@ -23,11 +23,7 @@ fn main() {
.arg(
Arg::with_name("block-backend")
.long("block-backend")
.help(
"vhost-user-block backend parameters \
\"path=<image_path>,socket=<socket_path>,num_queues=<number_of_queues>,\
readonly=true|false,direct=true|false,poll_queue=true|false\"",
)
.help(vhost_user_block::SYNTAX)
.takes_value(true)
.min_values(1),
)

6
src/main.rs
View File

@ -243,11 +243,7 @@ fn create_app<'a, 'b>(
.arg(
Arg::with_name("block-backend")
.long("block-backend")
.help(
"vhost-user-block backend parameters \
\"path=<image_path>,socket=<socket_path>,num_queues=<number_of_queues>,\
readonly=true|false,direct=true|false,poll_queue=true|false\"",
)
.help(vhost_user_block::SYNTAX)
.takes_value(true)
.conflicts_with_all(&["net-backend", "kernel"])
.min_values(1),

4
vhost_user_block/src/lib.rs
View File

@ -77,6 +77,10 @@ enum Error {
HandleEventUnknownEvent,
}
pub const SYNTAX: &str = "vhost-user-block backend parameters \
\"path=<image_path>,socket=<socket_path>,num_queues=<number_of_queues>,\
readonly=true|false,direct=true|false,poll_queue=true|false\"";
impl fmt::Display for Error {
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
write!(f, "vhost_user_block_error: {:?}", self)