From: Eric Blake <ebl...@redhat.com>
Although we have long supported 'qemu-img convert -o
backing_file=foo,backing_fmt=bar', the fact that we have a shortcut -B
for backing_file but none for backing_fmt has made it more likely that
users accidentally run into:
qemu-img: warning: Deprecated use of backing file without explicit backing
format
when using -B instead of -o. For similarity with other qemu-img
commands, such as create and compare, add '-F $fmt' as the shorthand
for '-o backing_fmt=$fmt'. Update iotest 122 for coverage of both
spellings.
Signed-off-by: Eric Blake <ebl...@redhat.com>
Message-Id: <20210913131735.1948339-1-ebl...@redhat.com>
Reviewed-by: Vladimir Sementsov-Ogievskiy <vsement...@virtuozzo.com>
Reviewed-by: Maxim Levitsky <mlevi...@redhat.com>
Signed-off-by: Hanna Reitz <hre...@redhat.com>
---
docs/tools/qemu-img.rst | 4 ++--
qemu-img.c | 10 +++++++---
qemu-img-cmds.hx | 2 +-
tests/qemu-iotests/122 | 2 +-
4 files changed, 11 insertions(+), 7 deletions(-)
diff --git a/docs/tools/qemu-img.rst b/docs/tools/qemu-img.rst
index fe6c30d509..d58980aef8 100644
--- a/docs/tools/qemu-img.rst
+++ b/docs/tools/qemu-img.rst
@@ -415,7 +415,7 @@ Command description:
4
Error on reading data
-.. option:: convert [--object OBJECTDEF] [--image-opts] [--target-image-opts]
[--target-is-zero] [--bitmaps [--skip-broken-bitmaps]] [-U] [-C] [-c] [-p] [-q]
[-n] [-f FMT] [-t CACHE] [-T SRC_CACHE] [-O OUTPUT_FMT] [-B BACKING_FILE] [-o
OPTIONS] [-l SNAPSHOT_PARAM] [-S SPARSE_SIZE] [-r RATE_LIMIT] [-m
NUM_COROUTINES] [-W] FILENAME [FILENAME2 [...]] OUTPUT_FILENAME
+.. option:: convert [--object OBJECTDEF] [--image-opts] [--target-image-opts]
[--target-is-zero] [--bitmaps [--skip-broken-bitmaps]] [-U] [-C] [-c] [-p] [-q]
[-n] [-f FMT] [-t CACHE] [-T SRC_CACHE] [-O OUTPUT_FMT] [-B BACKING_FILE [-F
backing_fmt]] [-o OPTIONS] [-l SNAPSHOT_PARAM] [-S SPARSE_SIZE] [-r RATE_LIMIT]
[-m NUM_COROUTINES] [-W] FILENAME [FILENAME2 [...]] OUTPUT_FILENAME
Convert the disk image *FILENAME* or a snapshot *SNAPSHOT_PARAM*
to disk image *OUTPUT_FILENAME* using format *OUTPUT_FMT*. It can
@@ -439,7 +439,7 @@ Command description:
You can use the *BACKING_FILE* option to force the output image to be
created as a copy on write image of the specified base image; the
*BACKING_FILE* should have the same content as the input's base image,
- however the path, image format, etc may differ.
+ however the path, image format (as given by *BACKING_FMT*), etc may differ.
If a relative path name is given, the backing file is looked up relative to
the directory containing *OUTPUT_FILENAME*.
diff --git a/qemu-img.c b/qemu-img.c
index e43a71a794..f036a1d428 100644
--- a/qemu-img.c
+++ b/qemu-img.c
@@ -2183,7 +2183,8 @@ static int img_convert(int argc, char **argv)
int c, bs_i, flags, src_flags = BDRV_O_NO_SHARE;
const char *fmt = NULL, *out_fmt = NULL, *cache = "unsafe",
*src_cache = BDRV_DEFAULT_CACHE, *out_baseimg = NULL,
- *out_filename, *out_baseimg_param, *snapshot_name = NULL;
+ *out_filename, *out_baseimg_param, *snapshot_name = NULL,
+ *backing_fmt = NULL;
BlockDriver *drv = NULL, *proto_drv = NULL;
BlockDriverInfo bdi;
BlockDriverState *out_bs;
@@ -2223,7 +2224,7 @@ static int img_convert(int argc, char **argv)
{"skip-broken-bitmaps", no_argument, 0, OPTION_SKIP_BROKEN},
{0, 0, 0, 0}
};
- c = getopt_long(argc, argv, ":hf:O:B:Cco:l:S:pt:T:qnm:WUr:",
+ c = getopt_long(argc, argv, ":hf:O:B:CcF:o:l:S:pt:T:qnm:WUr:",
long_options, NULL);
if (c == -1) {
break;
@@ -2253,6 +2254,9 @@ static int img_convert(int argc, char **argv)
case 'c':
s.compressed = true;
break;
+ case 'F':
+ backing_fmt = optarg;
+ break;
case 'o':
if (accumulate_options(&options, optarg) < 0) {
goto fail_getopt;
@@ -2521,7 +2525,7 @@ static int img_convert(int argc, char **argv)
qemu_opt_set_number(opts, BLOCK_OPT_SIZE,
s.total_sectors * BDRV_SECTOR_SIZE, &error_abort);
- ret = add_old_style_options(out_fmt, opts, out_baseimg, NULL);
+ ret = add_old_style_options(out_fmt, opts, out_baseimg, backing_fmt);
if (ret < 0) {
goto out;
}
diff --git a/qemu-img-cmds.hx b/qemu-img-cmds.hx
index b3620f29e5..4c4d94ab22 100644
--- a/qemu-img-cmds.hx
+++ b/qemu-img-cmds.hx
@@ -46,7 +46,7 @@ SRST
ERST
DEF("convert", img_convert,
- "convert [--object objectdef] [--image-opts] [--target-image-opts]
[--target-is-zero] [--bitmaps] [-U] [-C] [-c] [-p] [-q] [-n] [-f fmt] [-t
cache] [-T src_cache] [-O output_fmt] [-B backing_file] [-o options] [-l
snapshot_param] [-S sparse_size] [-r rate_limit] [-m num_coroutines] [-W]
[--salvage] filename [filename2 [...]] output_filename")
+ "convert [--object objectdef] [--image-opts] [--target-image-opts]
[--target-is-zero] [--bitmaps] [-U] [-C] [-c] [-p] [-q] [-n] [-f fmt] [-t
cache] [-T src_cache] [-O output_fmt] [-B backing_file [-F backing_fmt]] [-o
options] [-l snapshot_param] [-S sparse_size] [-r rate_limit] [-m
num_coroutines] [-W] [--salvage] filename [filename2 [...]] output_filename")
SRST
.. option:: convert [--object OBJECTDEF] [--image-opts] [--target-image-opts]
[--target-is-zero] [--bitmaps] [-U] [-C] [-c] [-p] [-q] [-n] [-f FMT] [-t
CACHE] [-T SRC_CACHE] [-O OUTPUT_FMT] [-B BACKING_FILE] [-o OPTIONS] [-l
SNAPSHOT_PARAM] [-S SPARSE_SIZE] [-r RATE_LIMIT] [-m NUM_COROUTINES] [-W]
[--salvage] FILENAME [FILENAME2 [...]] OUTPUT_FILENAME
ERST
diff --git a/tests/qemu-iotests/122 b/tests/qemu-iotests/122
index 5d550ed13e..efb260d822 100755
--- a/tests/qemu-iotests/122
+++ b/tests/qemu-iotests/122
@@ -67,7 +67,7 @@ echo
_make_test_img -b "$TEST_IMG".base -F $IMGFMT
$QEMU_IO -c "write -P 0 0 3M" "$TEST_IMG" 2>&1 | _filter_qemu_io |
_filter_testdir
-$QEMU_IMG convert -O $IMGFMT -B "$TEST_IMG".base -o backing_fmt=$IMGFMT \
+$QEMU_IMG convert -O $IMGFMT -B "$TEST_IMG".base -F $IMGFMT \
"$TEST_IMG" "$TEST_IMG".orig
$QEMU_IO -c "read -P 0 0 3M" "$TEST_IMG".orig 2>&1 | _filter_qemu_io |
_filter_testdir
$QEMU_IMG convert -O $IMGFMT -c -B "$TEST_IMG".base -o backing_fmt=$IMGFMT \
--
2.31.1
