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https://github.com/xemu-project/xemu.git
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qemu-img: Add --force-share option to subcommands
This will force the opened images to allow sharing all permissions with other programs. Signed-off-by: Fam Zheng <famz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Fam Zheng
Kevin Wolf
parent
ffd1a5a25c
commit
335e993784
153
qemu-img.c
153
qemu-img.c
@ -28,6 +28,7 @@
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#include "qapi/qobject-output-visitor.h"
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#include "qapi/qmp/qerror.h"
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#include "qapi/qmp/qjson.h"
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#include "qapi/qmp/qbool.h"
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#include "qemu/cutils.h"
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#include "qemu/config-file.h"
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#include "qemu/option.h"
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@ -283,12 +284,20 @@ static int img_open_password(BlockBackend *blk, const char *filename,
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static BlockBackend *img_open_opts(const char *optstr,
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QemuOpts *opts, int flags, bool writethrough,
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bool quiet)
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bool quiet, bool force_share)
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{
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QDict *options;
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Error *local_err = NULL;
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BlockBackend *blk;
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options = qemu_opts_to_qdict(opts, NULL);
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if (force_share) {
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if (qdict_haskey(options, BDRV_OPT_FORCE_SHARE)
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&& !qdict_get_bool(options, BDRV_OPT_FORCE_SHARE)) {
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error_report("--force-share/-U conflicts with image options");
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return NULL;
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}
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qdict_put(options, BDRV_OPT_FORCE_SHARE, qbool_from_bool(true));
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}
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blk = blk_new_open(NULL, NULL, options, flags, &local_err);
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if (!blk) {
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error_reportf_err(local_err, "Could not open '%s': ", optstr);
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@ -305,17 +314,20 @@ static BlockBackend *img_open_opts(const char *optstr,
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static BlockBackend *img_open_file(const char *filename,
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const char *fmt, int flags,
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bool writethrough, bool quiet)
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bool writethrough, bool quiet,
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bool force_share)
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{
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BlockBackend *blk;
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Error *local_err = NULL;
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QDict *options = NULL;
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QDict *options = qdict_new();
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if (fmt) {
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options = qdict_new();
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qdict_put_str(options, "driver", fmt);
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}
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if (force_share) {
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qdict_put(options, BDRV_OPT_FORCE_SHARE, qbool_from_bool(true));
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}
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blk = blk_new_open(filename, NULL, options, flags, &local_err);
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if (!blk) {
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error_reportf_err(local_err, "Could not open '%s': ", filename);
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@ -334,7 +346,7 @@ static BlockBackend *img_open_file(const char *filename,
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static BlockBackend *img_open(bool image_opts,
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const char *filename,
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const char *fmt, int flags, bool writethrough,
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bool quiet)
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bool quiet, bool force_share)
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{
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BlockBackend *blk;
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if (image_opts) {
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@ -348,9 +360,11 @@ static BlockBackend *img_open(bool image_opts,
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if (!opts) {
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return NULL;
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}
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blk = img_open_opts(filename, opts, flags, writethrough, quiet);
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blk = img_open_opts(filename, opts, flags, writethrough, quiet,
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force_share);
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} else {
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blk = img_open_file(filename, fmt, flags, writethrough, quiet);
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blk = img_open_file(filename, fmt, flags, writethrough, quiet,
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force_share);
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}
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return blk;
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}
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@ -650,6 +664,7 @@ static int img_check(int argc, char **argv)
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ImageCheck *check;
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bool quiet = false;
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bool image_opts = false;
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bool force_share = false;
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fmt = NULL;
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output = NULL;
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@ -664,9 +679,10 @@ static int img_check(int argc, char **argv)
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{"output", required_argument, 0, OPTION_OUTPUT},
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{"object", required_argument, 0, OPTION_OBJECT},
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{"image-opts", no_argument, 0, OPTION_IMAGE_OPTS},
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{"force-share", no_argument, 0, 'U'},
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{0, 0, 0, 0}
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};
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c = getopt_long(argc, argv, ":hf:r:T:q",
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c = getopt_long(argc, argv, ":hf:r:T:qU",
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long_options, &option_index);
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if (c == -1) {
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break;
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@ -705,6 +721,9 @@ static int img_check(int argc, char **argv)
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case 'q':
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quiet = true;
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break;
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case 'U':
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force_share = true;
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break;
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case OPTION_OBJECT: {
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QemuOpts *opts;
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opts = qemu_opts_parse_noisily(&qemu_object_opts,
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@ -744,7 +763,8 @@ static int img_check(int argc, char **argv)
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return 1;
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}
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blk = img_open(image_opts, filename, fmt, flags, writethrough, quiet);
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blk = img_open(image_opts, filename, fmt, flags, writethrough, quiet,
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force_share);
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if (!blk) {
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return 1;
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}
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@ -947,7 +967,8 @@ static int img_commit(int argc, char **argv)
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return 1;
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}
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blk = img_open(image_opts, filename, fmt, flags, writethrough, quiet);
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blk = img_open(image_opts, filename, fmt, flags, writethrough, quiet,
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false);
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if (!blk) {
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return 1;
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}
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@ -1206,6 +1227,7 @@ static int img_compare(int argc, char **argv)
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int c, pnum;
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uint64_t progress_base;
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bool image_opts = false;
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bool force_share = false;
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cache = BDRV_DEFAULT_CACHE;
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for (;;) {
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@ -1213,9 +1235,10 @@ static int img_compare(int argc, char **argv)
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{"help", no_argument, 0, 'h'},
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{"object", required_argument, 0, OPTION_OBJECT},
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{"image-opts", no_argument, 0, OPTION_IMAGE_OPTS},
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{"force-share", no_argument, 0, 'U'},
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{0, 0, 0, 0}
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};
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c = getopt_long(argc, argv, ":hf:F:T:pqs",
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c = getopt_long(argc, argv, ":hf:F:T:pqsU",
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long_options, NULL);
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if (c == -1) {
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break;
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@ -1248,6 +1271,9 @@ static int img_compare(int argc, char **argv)
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case 's':
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strict = true;
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break;
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case 'U':
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force_share = true;
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break;
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case OPTION_OBJECT: {
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QemuOpts *opts;
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opts = qemu_opts_parse_noisily(&qemu_object_opts,
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@ -1293,13 +1319,15 @@ static int img_compare(int argc, char **argv)
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goto out3;
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}
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blk1 = img_open(image_opts, filename1, fmt1, flags, writethrough, quiet);
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blk1 = img_open(image_opts, filename1, fmt1, flags, writethrough, quiet,
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force_share);
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if (!blk1) {
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ret = 2;
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goto out3;
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}
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blk2 = img_open(image_opts, filename2, fmt2, flags, writethrough, quiet);
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blk2 = img_open(image_opts, filename2, fmt2, flags, writethrough, quiet,
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force_share);
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if (!blk2) {
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ret = 2;
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goto out2;
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@ -1902,6 +1930,7 @@ static int img_convert(int argc, char **argv)
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bool writethrough, src_writethrough, quiet = false, image_opts = false,
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skip_create = false, progress = false;
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int64_t ret = -EINVAL;
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bool force_share = false;
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ImgConvertState s = (ImgConvertState) {
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/* Need at least 4k of zeros for sparse detection */
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@ -1916,9 +1945,10 @@ static int img_convert(int argc, char **argv)
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{"help", no_argument, 0, 'h'},
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{"object", required_argument, 0, OPTION_OBJECT},
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{"image-opts", no_argument, 0, OPTION_IMAGE_OPTS},
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{"force-share", no_argument, 0, 'U'},
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{0, 0, 0, 0}
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};
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c = getopt_long(argc, argv, ":hf:O:B:ce6o:s:l:S:pt:T:qnm:W",
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c = getopt_long(argc, argv, ":hf:O:B:ce6o:s:l:S:pt:T:qnm:WU",
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long_options, NULL);
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if (c == -1) {
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break;
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@ -2021,6 +2051,9 @@ static int img_convert(int argc, char **argv)
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case 'W':
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s.wr_in_order = false;
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break;
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case 'U':
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force_share = true;
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break;
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case OPTION_OBJECT: {
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QemuOpts *object_opts;
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object_opts = qemu_opts_parse_noisily(&qemu_object_opts,
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@ -2080,7 +2113,8 @@ static int img_convert(int argc, char **argv)
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for (bs_i = 0; bs_i < s.src_num; bs_i++) {
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s.src[bs_i] = img_open(image_opts, argv[optind + bs_i],
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fmt, src_flags, src_writethrough, quiet);
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fmt, src_flags, src_writethrough, quiet,
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force_share);
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if (!s.src[bs_i]) {
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ret = -1;
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goto out;
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@ -2233,7 +2267,8 @@ static int img_convert(int argc, char **argv)
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* the bdrv_create() call which takes different params.
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* Not critical right now, so fix can wait...
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*/
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s.target = img_open_file(out_filename, out_fmt, flags, writethrough, quiet);
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s.target = img_open_file(out_filename, out_fmt, flags, writethrough, quiet,
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false);
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if (!s.target) {
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ret = -1;
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goto out;
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@ -2384,7 +2419,7 @@ static gboolean str_equal_func(gconstpointer a, gconstpointer b)
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static ImageInfoList *collect_image_info_list(bool image_opts,
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const char *filename,
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const char *fmt,
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bool chain)
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bool chain, bool force_share)
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{
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ImageInfoList *head = NULL;
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ImageInfoList **last = &head;
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@ -2407,7 +2442,8 @@ static ImageInfoList *collect_image_info_list(bool image_opts,
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g_hash_table_insert(filenames, (gpointer)filename, NULL);
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blk = img_open(image_opts, filename, fmt,
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BDRV_O_NO_BACKING | BDRV_O_NO_IO, false, false);
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BDRV_O_NO_BACKING | BDRV_O_NO_IO, false, false,
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force_share);
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if (!blk) {
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goto err;
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}
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@ -2459,6 +2495,7 @@ static int img_info(int argc, char **argv)
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const char *filename, *fmt, *output;
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ImageInfoList *list;
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bool image_opts = false;
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bool force_share = false;
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fmt = NULL;
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output = NULL;
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@ -2471,9 +2508,10 @@ static int img_info(int argc, char **argv)
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{"backing-chain", no_argument, 0, OPTION_BACKING_CHAIN},
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{"object", required_argument, 0, OPTION_OBJECT},
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{"image-opts", no_argument, 0, OPTION_IMAGE_OPTS},
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{"force-share", no_argument, 0, 'U'},
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{0, 0, 0, 0}
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};
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c = getopt_long(argc, argv, ":f:h",
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c = getopt_long(argc, argv, ":f:hU",
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long_options, &option_index);
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if (c == -1) {
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break;
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@ -2491,6 +2529,9 @@ static int img_info(int argc, char **argv)
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case 'f':
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fmt = optarg;
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break;
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case 'U':
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force_share = true;
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break;
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case OPTION_OUTPUT:
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output = optarg;
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break;
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@ -2530,7 +2571,8 @@ static int img_info(int argc, char **argv)
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return 1;
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}
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list = collect_image_info_list(image_opts, filename, fmt, chain);
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list = collect_image_info_list(image_opts, filename, fmt, chain,
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force_share);
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if (!list) {
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return 1;
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}
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@ -2676,6 +2718,7 @@ static int img_map(int argc, char **argv)
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MapEntry curr = { .length = 0 }, next;
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int ret = 0;
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bool image_opts = false;
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bool force_share = false;
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fmt = NULL;
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output = NULL;
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@ -2687,9 +2730,10 @@ static int img_map(int argc, char **argv)
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{"output", required_argument, 0, OPTION_OUTPUT},
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{"object", required_argument, 0, OPTION_OBJECT},
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{"image-opts", no_argument, 0, OPTION_IMAGE_OPTS},
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{"force-share", no_argument, 0, 'U'},
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{0, 0, 0, 0}
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};
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c = getopt_long(argc, argv, ":f:h",
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c = getopt_long(argc, argv, ":f:hU",
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long_options, &option_index);
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if (c == -1) {
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break;
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@ -2707,6 +2751,9 @@ static int img_map(int argc, char **argv)
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case 'f':
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fmt = optarg;
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break;
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case 'U':
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force_share = true;
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break;
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case OPTION_OUTPUT:
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output = optarg;
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break;
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@ -2743,7 +2790,7 @@ static int img_map(int argc, char **argv)
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return 1;
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}
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blk = img_open(image_opts, filename, fmt, 0, false, false);
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blk = img_open(image_opts, filename, fmt, 0, false, false, force_share);
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if (!blk) {
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return 1;
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}
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@ -2806,6 +2853,7 @@ static int img_snapshot(int argc, char **argv)
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bool quiet = false;
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Error *err = NULL;
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bool image_opts = false;
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bool force_share = false;
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bdrv_oflags = BDRV_O_RDWR;
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/* Parse commandline parameters */
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@ -2814,9 +2862,10 @@ static int img_snapshot(int argc, char **argv)
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{"help", no_argument, 0, 'h'},
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{"object", required_argument, 0, OPTION_OBJECT},
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{"image-opts", no_argument, 0, OPTION_IMAGE_OPTS},
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{"force-share", no_argument, 0, 'U'},
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{0, 0, 0, 0}
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};
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c = getopt_long(argc, argv, ":la:c:d:hq",
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c = getopt_long(argc, argv, ":la:c:d:hqU",
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long_options, NULL);
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if (c == -1) {
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break;
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@ -2866,6 +2915,9 @@ static int img_snapshot(int argc, char **argv)
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case 'q':
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quiet = true;
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break;
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case 'U':
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force_share = true;
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break;
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case OPTION_OBJECT: {
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QemuOpts *opts;
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opts = qemu_opts_parse_noisily(&qemu_object_opts,
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@ -2892,7 +2944,8 @@ static int img_snapshot(int argc, char **argv)
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}
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/* Open the image */
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blk = img_open(image_opts, filename, NULL, bdrv_oflags, false, quiet);
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blk = img_open(image_opts, filename, NULL, bdrv_oflags, false, quiet,
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force_share);
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if (!blk) {
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return 1;
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}
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@ -2956,6 +3009,7 @@ static int img_rebase(int argc, char **argv)
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int c, flags, src_flags, ret;
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bool writethrough, src_writethrough;
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int unsafe = 0;
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bool force_share = false;
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int progress = 0;
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bool quiet = false;
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Error *local_err = NULL;
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@ -2972,9 +3026,10 @@ static int img_rebase(int argc, char **argv)
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{"help", no_argument, 0, 'h'},
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{"object", required_argument, 0, OPTION_OBJECT},
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{"image-opts", no_argument, 0, OPTION_IMAGE_OPTS},
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{"force-share", no_argument, 0, 'U'},
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{0, 0, 0, 0}
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};
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c = getopt_long(argc, argv, ":hf:F:b:upt:T:q",
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c = getopt_long(argc, argv, ":hf:F:b:upt:T:qU",
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long_options, NULL);
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if (c == -1) {
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break;
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@ -3024,6 +3079,9 @@ static int img_rebase(int argc, char **argv)
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case OPTION_IMAGE_OPTS:
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image_opts = true;
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break;
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case 'U':
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force_share = true;
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break;
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}
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}
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@ -3072,7 +3130,8 @@ static int img_rebase(int argc, char **argv)
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* Ignore the old backing file for unsafe rebase in case we want to correct
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* the reference to a renamed or moved backing file.
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*/
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blk = img_open(image_opts, filename, fmt, flags, writethrough, quiet);
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blk = img_open(image_opts, filename, fmt, flags, writethrough, quiet,
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false);
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if (!blk) {
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ret = -1;
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goto out;
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@ -3097,6 +3156,13 @@ static int img_rebase(int argc, char **argv)
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qdict_put_str(options, "driver", bs->backing_format);
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}
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if (force_share) {
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if (!options) {
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options = qdict_new();
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}
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qdict_put(options, BDRV_OPT_FORCE_SHARE,
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qbool_from_bool(true));
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}
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bdrv_get_backing_filename(bs, backing_name, sizeof(backing_name));
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blk_old_backing = blk_new_open(backing_name, NULL,
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options, src_flags, &local_err);
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@ -3109,11 +3175,12 @@ static int img_rebase(int argc, char **argv)
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}
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if (out_baseimg[0]) {
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||||
options = qdict_new();
|
||||
if (out_basefmt) {
|
||||
options = qdict_new();
|
||||
qdict_put_str(options, "driver", out_basefmt);
|
||||
} else {
|
||||
options = NULL;
|
||||
}
|
||||
if (force_share) {
|
||||
qdict_put_bool(options, BDRV_OPT_FORCE_SHARE, true);
|
||||
}
|
||||
|
||||
blk_new_backing = blk_new_open(out_baseimg, NULL,
|
||||
@ -3419,7 +3486,8 @@ static int img_resize(int argc, char **argv)
|
||||
qemu_opts_del(param);
|
||||
|
||||
blk = img_open(image_opts, filename, fmt,
|
||||
BDRV_O_RDWR | BDRV_O_RESIZE, false, quiet);
|
||||
BDRV_O_RDWR | BDRV_O_RESIZE, false, quiet,
|
||||
false);
|
||||
if (!blk) {
|
||||
ret = -1;
|
||||
goto out;
|
||||
@ -3573,7 +3641,8 @@ static int img_amend(int argc, char **argv)
|
||||
goto out;
|
||||
}
|
||||
|
||||
blk = img_open(image_opts, filename, fmt, flags, writethrough, quiet);
|
||||
blk = img_open(image_opts, filename, fmt, flags, writethrough, quiet,
|
||||
false);
|
||||
if (!blk) {
|
||||
ret = -1;
|
||||
goto out;
|
||||
@ -3741,6 +3810,7 @@ static int img_bench(int argc, char **argv)
|
||||
bool writethrough = false;
|
||||
struct timeval t1, t2;
|
||||
int i;
|
||||
bool force_share = false;
|
||||
|
||||
for (;;) {
|
||||
static const struct option long_options[] = {
|
||||
@ -3749,9 +3819,10 @@ static int img_bench(int argc, char **argv)
|
||||
{"image-opts", no_argument, 0, OPTION_IMAGE_OPTS},
|
||||
{"pattern", required_argument, 0, OPTION_PATTERN},
|
||||
{"no-drain", no_argument, 0, OPTION_NO_DRAIN},
|
||||
{"force-share", no_argument, 0, 'U'},
|
||||
{0, 0, 0, 0}
|
||||
};
|
||||
c = getopt_long(argc, argv, ":hc:d:f:no:qs:S:t:w", long_options, NULL);
|
||||
c = getopt_long(argc, argv, ":hc:d:f:no:qs:S:t:wU", long_options, NULL);
|
||||
if (c == -1) {
|
||||
break;
|
||||
}
|
||||
@ -3845,6 +3916,9 @@ static int img_bench(int argc, char **argv)
|
||||
flags |= BDRV_O_RDWR;
|
||||
is_write = true;
|
||||
break;
|
||||
case 'U':
|
||||
force_share = true;
|
||||
break;
|
||||
case OPTION_PATTERN:
|
||||
{
|
||||
unsigned long res;
|
||||
@ -3892,7 +3966,8 @@ static int img_bench(int argc, char **argv)
|
||||
goto out;
|
||||
}
|
||||
|
||||
blk = img_open(image_opts, filename, fmt, flags, writethrough, quiet);
|
||||
blk = img_open(image_opts, filename, fmt, flags, writethrough, quiet,
|
||||
force_share);
|
||||
if (!blk) {
|
||||
ret = -1;
|
||||
goto out;
|
||||
@ -4059,6 +4134,7 @@ static int img_dd(int argc, char **argv)
|
||||
const char *fmt = NULL;
|
||||
int64_t size = 0;
|
||||
int64_t block_count = 0, out_pos, in_pos;
|
||||
bool force_share = false;
|
||||
struct DdInfo dd = {
|
||||
.flags = 0,
|
||||
.count = 0,
|
||||
@ -4087,10 +4163,11 @@ static int img_dd(int argc, char **argv)
|
||||
const struct option long_options[] = {
|
||||
{ "help", no_argument, 0, 'h'},
|
||||
{ "image-opts", no_argument, 0, OPTION_IMAGE_OPTS},
|
||||
{ "force-share", no_argument, 0, 'U'},
|
||||
{ 0, 0, 0, 0 }
|
||||
};
|
||||
|
||||
while ((c = getopt_long(argc, argv, ":hf:O:", long_options, NULL))) {
|
||||
while ((c = getopt_long(argc, argv, ":hf:O:U", long_options, NULL))) {
|
||||
if (c == EOF) {
|
||||
break;
|
||||
}
|
||||
@ -4110,6 +4187,9 @@ static int img_dd(int argc, char **argv)
|
||||
case 'h':
|
||||
help();
|
||||
break;
|
||||
case 'U':
|
||||
force_share = true;
|
||||
break;
|
||||
case OPTION_IMAGE_OPTS:
|
||||
image_opts = true;
|
||||
break;
|
||||
@ -4154,7 +4234,8 @@ static int img_dd(int argc, char **argv)
|
||||
ret = -1;
|
||||
goto out;
|
||||
}
|
||||
blk1 = img_open(image_opts, in.filename, fmt, 0, false, false);
|
||||
blk1 = img_open(image_opts, in.filename, fmt, 0, false, false,
|
||||
force_share);
|
||||
|
||||
if (!blk1) {
|
||||
ret = -1;
|
||||
@ -4222,7 +4303,7 @@ static int img_dd(int argc, char **argv)
|
||||
}
|
||||
|
||||
blk2 = img_open(image_opts, out.filename, out_fmt, BDRV_O_RDWR,
|
||||
false, false);
|
||||
false, false, false);
|
||||
|
||||
if (!blk2) {
|
||||
ret = -1;
|
||||
|
||||
Loading…
Reference in New Issue
Block a user