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Date: Tue, 19 Apr 2016 20:58:25 +0800
From: Fam Zheng <famz@redhat.com>
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Subject: Re: [Qemu-devel] [PATCH for-2.7 v2 11/17] qemu-nbd: Add
 "--no-lock/-L" option
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To: "Denis V. Lunev" <den@openvz.org>
Cc: qemu-devel@nongnu.org, Kevin Wolf <kwolf@redhat.com>, Max Reitz <mreitz@redhat.com>, Jeff Cody <jcody@redhat.com>, Markus Armbruster <armbru@redhat.com>, Eric Blake <eblake@redhat.com>, John Snow <jsnow@redhat.com>, qemu-block@nongnu.org, berrange@redhat.com, pbonzini@redhat.com

On Sat, 04/16 17:32, Denis V. Lunev wrote:
> On 04/15/2016 06:28 AM, Fam Zheng wrote:
> >Signed-off-by: Fam Zheng <famz@redhat.com>
> >---
> >  qemu-nbd.c    | 6 +++++-
> >  qemu-nbd.texi | 2 ++
> >  2 files changed, 7 insertions(+), 1 deletion(-)
> >
> >diff --git a/qemu-nbd.c b/qemu-nbd.c
> >index b5751f8..37da7a9 100644
> >--- a/qemu-nbd.c
> >+++ b/qemu-nbd.c
> >@@ -464,7 +464,7 @@ int main(int argc, char **argv)
> >      off_t fd_size;
> >      QemuOpts *sn_opts = NULL;
> >      const char *sn_id_or_name = NULL;
> >-    const char *sopt = "hVb:o:p:rsnP:c:dvk:e:f:tl:x:";
> >+    const char *sopt = "hVb:o:p:rsnLP:c:dvk:e:f:tl:x:";
> >      struct option lopt[] = {
> >          { "help", no_argument, NULL, 'h' },
> >          { "version", no_argument, NULL, 'V' },
> >@@ -473,6 +473,7 @@ int main(int argc, char **argv)
> >          { "socket", required_argument, NULL, 'k' },
> >          { "offset", required_argument, NULL, 'o' },
> >          { "read-only", no_argument, NULL, 'r' },
> >+        { "no-lock", no_argument, NULL, 'L' },
> >          { "partition", required_argument, NULL, 'P' },
> >          { "connect", required_argument, NULL, 'c' },
> >          { "disconnect", no_argument, NULL, 'd' },
> >@@ -628,6 +629,9 @@ int main(int argc, char **argv)
> >              nbdflags |= NBD_FLAG_READ_ONLY;
> >              flags &= ~BDRV_O_RDWR;
> >              break;
> >+        case 'L':
> >+            flags |= BDRV_O_NO_LOCK;
> >+            break;
> >          case 'P':
> >              partition = strtol(optarg, &end, 0);
> >              if (*end) {
> >diff --git a/qemu-nbd.texi b/qemu-nbd.texi
> >index 9f23343..6b7b1d1 100644
> >--- a/qemu-nbd.texi
> >+++ b/qemu-nbd.texi
> >@@ -43,6 +43,8 @@ Force the use of the block driver for format @var{fmt} instead of
> >  auto-detecting
> >  @item -r, --read-only
> >  Export the disk as read-only
> >+@item -L, --no-lock
> >+Disable image locking
> >  @item -P, --partition=@var{num}
> >  Only expose partition @var{num}
> >  @item -s, --snapshot
> pls fix
> 
> static void usage(const char *name)
> {
>     (printf) (
> "Usage: %s [OPTIONS] FILE\n"
> 

Will do.

Fam