[Qemu-devel] [PATCH 3/4] qemu-nbd: add doc for internal snapshot export

[Wenchao Xia <xiawenc@linux.vnet.ibm.com>]

Signed-off-by: Wenchao Xia <xiawenc@linux.vnet.ibm.com>
---
 qemu-nbd.c    |    2 ++
 qemu-nbd.texi |    3 +++
 2 files changed, 5 insertions(+), 0 deletions(-)

diff --git a/qemu-nbd.c b/qemu-nbd.c
index 46be2b2..8eeee33 100644
--- a/qemu-nbd.c
+++ b/qemu-nbd.c
@@ -80,6 +80,8 @@ static void usage(const char *name)
 "Block device options:\n"
 "  -r, --read-only      export read-only\n"
 "  -s, --snapshot       use snapshot file\n"
+"  -l, --snapshot-load  temporarily load an internal snapshot and export it as\n"
+"                       an read-only device, format is 'id=[ID],name=[NAME]'\n"
 "  -n, --nocache        disable host cache\n"
 "      --cache=MODE     set cache mode (none, writeback, ...)\n"
 #ifdef CONFIG_LINUX_AIO
diff --git a/qemu-nbd.texi b/qemu-nbd.texi
index 6055ec6..86e8e1b 100644
--- a/qemu-nbd.texi
+++ b/qemu-nbd.texi
@@ -28,6 +28,9 @@ Export QEMU disk image using NBD protocol.
   only expose partition @var{num}
 @item -s, --snapshot
   use snapshot file
+@item -l, --snapshot-load
+  temporarily load an internal snapshot and export it as
+  an read-only device, format is 'id=[ID],name=[NAME]'
 @item -n, --nocache
 @itemx --cache=@var{cache}
   set cache mode to be used with the file.  See the documentation of
-- 
1.7.1