qemu-img: Use user_creatable_process_cmdline() for --object
This switches qemu-img from a QemuOpts-based parser for --object to
user_creatable_process_cmdline() which uses a keyval parser and enforces
the QAPI schema.
Apart from being a cleanup, this makes non-scalar properties accessible.
As a side effect, fix wrong exit codes in the object parsing error path
of 'qemu-img compare'. This was broken in commit 334c43e2c3 because
&error_fatal exits with an exit code of 1, while it should have been 2.
Document that exit code 0 is also returned when just requested help was
printed instead of comparing images. This is preexisting behaviour that
isn't changed by this patch, though another instance of it is added with
'--object help'.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Acked-by: Peter Krempa <pkrempa@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
diff --git a/docs/tools/qemu-img.rst b/docs/tools/qemu-img.rst
index b615aa8..c9efcfa 100644
--- a/docs/tools/qemu-img.rst
+++ b/docs/tools/qemu-img.rst
@@ -404,7 +404,7 @@
The following table sumarizes all exit codes of the compare subcommand:
0
- Images are identical
+ Images are identical (or requested help was printed)
1
Images differ
2
diff --git a/qemu-img.c b/qemu-img.c
index e2952fe..babb557 100644
--- a/qemu-img.c
+++ b/qemu-img.c
@@ -226,23 +226,6 @@
exit(EXIT_SUCCESS);
}
-static QemuOptsList qemu_object_opts = {
- .name = "object",
- .implied_opt_name = "qom-type",
- .head = QTAILQ_HEAD_INITIALIZER(qemu_object_opts.head),
- .desc = {
- { }
- },
-};
-
-static bool qemu_img_object_print_help(const char *type, QemuOpts *opts)
-{
- if (user_creatable_print_help(type, opts)) {
- exit(0);
- }
- return true;
-}
-
/*
* Is @optarg safe for accumulate_options()?
* It is when multiple of them can be joined together separated by ','.
@@ -566,14 +549,9 @@
case 'u':
flags |= BDRV_O_NO_BACKING;
break;
- case OPTION_OBJECT: {
- QemuOpts *opts;
- opts = qemu_opts_parse_noisily(&qemu_object_opts,
- optarg, true);
- if (!opts) {
- goto fail;
- }
- } break;
+ case OPTION_OBJECT:
+ user_creatable_process_cmdline(optarg);
+ break;
}
}
@@ -589,12 +567,6 @@
}
optind++;
- if (qemu_opts_foreach(&qemu_object_opts,
- user_creatable_add_opts_foreach,
- qemu_img_object_print_help, &error_fatal)) {
- goto fail;
- }
-
/* Get image size, if specified */
if (optind < argc) {
int64_t sval;
@@ -804,14 +776,9 @@
case 'U':
force_share = true;
break;
- case OPTION_OBJECT: {
- QemuOpts *opts;
- opts = qemu_opts_parse_noisily(&qemu_object_opts,
- optarg, true);
- if (!opts) {
- return 1;
- }
- } break;
+ case OPTION_OBJECT:
+ user_creatable_process_cmdline(optarg);
+ break;
case OPTION_IMAGE_OPTS:
image_opts = true;
break;
@@ -831,12 +798,6 @@
return 1;
}
- if (qemu_opts_foreach(&qemu_object_opts,
- user_creatable_add_opts_foreach,
- qemu_img_object_print_help, &error_fatal)) {
- return 1;
- }
-
ret = bdrv_parse_cache_mode(cache, &flags, &writethrough);
if (ret < 0) {
error_report("Invalid source cache option: %s", cache);
@@ -1034,14 +995,9 @@
return 1;
}
break;
- case OPTION_OBJECT: {
- QemuOpts *opts;
- opts = qemu_opts_parse_noisily(&qemu_object_opts,
- optarg, true);
- if (!opts) {
- return 1;
- }
- } break;
+ case OPTION_OBJECT:
+ user_creatable_process_cmdline(optarg);
+ break;
case OPTION_IMAGE_OPTS:
image_opts = true;
break;
@@ -1058,12 +1014,6 @@
}
filename = argv[optind++];
- if (qemu_opts_foreach(&qemu_object_opts,
- user_creatable_add_opts_foreach,
- qemu_img_object_print_help, &error_fatal)) {
- return 1;
- }
-
flags = BDRV_O_RDWR | BDRV_O_UNMAP;
ret = bdrv_parse_cache_mode(cache, &flags, &writethrough);
if (ret < 0) {
@@ -1353,7 +1303,7 @@
/*
* Compares two images. Exit codes:
*
- * 0 - Images are identical
+ * 0 - Images are identical or the requested help was printed
* 1 - Images differ
* >1 - Error occurred
*/
@@ -1423,15 +1373,21 @@
case 'U':
force_share = true;
break;
- case OPTION_OBJECT: {
- QemuOpts *opts;
- opts = qemu_opts_parse_noisily(&qemu_object_opts,
- optarg, true);
- if (!opts) {
- ret = 2;
- goto out4;
+ case OPTION_OBJECT:
+ {
+ Error *local_err = NULL;
+
+ if (!user_creatable_add_from_str(optarg, &local_err)) {
+ if (local_err) {
+ error_report_err(local_err);
+ exit(2);
+ } else {
+ /* Help was printed */
+ exit(EXIT_SUCCESS);
+ }
+ }
+ break;
}
- } break;
case OPTION_IMAGE_OPTS:
image_opts = true;
break;
@@ -1450,13 +1406,6 @@
filename1 = argv[optind++];
filename2 = argv[optind++];
- if (qemu_opts_foreach(&qemu_object_opts,
- user_creatable_add_opts_foreach,
- qemu_img_object_print_help, &error_fatal)) {
- ret = 2;
- goto out4;
- }
-
/* Initialize before goto out */
qemu_progress_init(progress, 2.0);
@@ -1641,7 +1590,6 @@
blk_unref(blk1);
out3:
qemu_progress_end();
-out4:
return ret;
}
@@ -2342,15 +2290,9 @@
goto fail_getopt;
}
break;
- case OPTION_OBJECT: {
- QemuOpts *object_opts;
- object_opts = qemu_opts_parse_noisily(&qemu_object_opts,
- optarg, true);
- if (!object_opts) {
- goto fail_getopt;
- }
+ case OPTION_OBJECT:
+ user_creatable_process_cmdline(optarg);
break;
- }
case OPTION_IMAGE_OPTS:
image_opts = true;
break;
@@ -2378,12 +2320,6 @@
out_fmt = "raw";
}
- if (qemu_opts_foreach(&qemu_object_opts,
- user_creatable_add_opts_foreach,
- qemu_img_object_print_help, &error_fatal)) {
- goto fail_getopt;
- }
-
if (s.compressed && s.copy_range) {
error_report("Cannot enable copy offloading when -c is used");
goto fail_getopt;
@@ -2971,14 +2907,9 @@
case OPTION_BACKING_CHAIN:
chain = true;
break;
- case OPTION_OBJECT: {
- QemuOpts *opts;
- opts = qemu_opts_parse_noisily(&qemu_object_opts,
- optarg, true);
- if (!opts) {
- return 1;
- }
- } break;
+ case OPTION_OBJECT:
+ user_creatable_process_cmdline(optarg);
+ break;
case OPTION_IMAGE_OPTS:
image_opts = true;
break;
@@ -2998,12 +2929,6 @@
return 1;
}
- if (qemu_opts_foreach(&qemu_object_opts,
- user_creatable_add_opts_foreach,
- qemu_img_object_print_help, &error_fatal)) {
- return 1;
- }
-
list = collect_image_info_list(image_opts, filename, fmt, chain,
force_share);
if (!list) {
@@ -3213,14 +3138,9 @@
return 1;
}
break;
- case OPTION_OBJECT: {
- QemuOpts *opts;
- opts = qemu_opts_parse_noisily(&qemu_object_opts,
- optarg, true);
- if (!opts) {
- return 1;
- }
- } break;
+ case OPTION_OBJECT:
+ user_creatable_process_cmdline(optarg);
+ break;
case OPTION_IMAGE_OPTS:
image_opts = true;
break;
@@ -3240,12 +3160,6 @@
return 1;
}
- if (qemu_opts_foreach(&qemu_object_opts,
- user_creatable_add_opts_foreach,
- qemu_img_object_print_help, &error_fatal)) {
- return 1;
- }
-
blk = img_open(image_opts, filename, fmt, 0, false, false, force_share);
if (!blk) {
return 1;
@@ -3384,14 +3298,9 @@
case 'U':
force_share = true;
break;
- case OPTION_OBJECT: {
- QemuOpts *opts;
- opts = qemu_opts_parse_noisily(&qemu_object_opts,
- optarg, true);
- if (!opts) {
- return 1;
- }
- } break;
+ case OPTION_OBJECT:
+ user_creatable_process_cmdline(optarg);
+ break;
case OPTION_IMAGE_OPTS:
image_opts = true;
break;
@@ -3403,12 +3312,6 @@
}
filename = argv[optind++];
- if (qemu_opts_foreach(&qemu_object_opts,
- user_creatable_add_opts_foreach,
- qemu_img_object_print_help, &error_fatal)) {
- return 1;
- }
-
/* Open the image */
blk = img_open(image_opts, filename, NULL, bdrv_oflags, false, quiet,
force_share);
@@ -3542,14 +3445,9 @@
case 'q':
quiet = true;
break;
- case OPTION_OBJECT: {
- QemuOpts *opts;
- opts = qemu_opts_parse_noisily(&qemu_object_opts,
- optarg, true);
- if (!opts) {
- return 1;
- }
- } break;
+ case OPTION_OBJECT:
+ user_creatable_process_cmdline(optarg);
+ break;
case OPTION_IMAGE_OPTS:
image_opts = true;
break;
@@ -3571,12 +3469,6 @@
}
filename = argv[optind++];
- if (qemu_opts_foreach(&qemu_object_opts,
- user_creatable_add_opts_foreach,
- qemu_img_object_print_help, &error_fatal)) {
- return 1;
- }
-
qemu_progress_init(progress, 2.0);
qemu_progress_print(0, 100);
@@ -3967,14 +3859,9 @@
case 'q':
quiet = true;
break;
- case OPTION_OBJECT: {
- QemuOpts *opts;
- opts = qemu_opts_parse_noisily(&qemu_object_opts,
- optarg, true);
- if (!opts) {
- return 1;
- }
- } break;
+ case OPTION_OBJECT:
+ user_creatable_process_cmdline(optarg);
+ break;
case OPTION_IMAGE_OPTS:
image_opts = true;
break;
@@ -3996,12 +3883,6 @@
}
filename = argv[optind++];
- if (qemu_opts_foreach(&qemu_object_opts,
- user_creatable_add_opts_foreach,
- qemu_img_object_print_help, &error_fatal)) {
- return 1;
- }
-
/* Choose grow, shrink, or absolute resize mode */
switch (size[0]) {
case '+':
@@ -4181,12 +4062,7 @@
quiet = true;
break;
case OPTION_OBJECT:
- opts = qemu_opts_parse_noisily(&qemu_object_opts,
- optarg, true);
- if (!opts) {
- ret = -1;
- goto out_no_progress;
- }
+ user_creatable_process_cmdline(optarg);
break;
case OPTION_IMAGE_OPTS:
image_opts = true;
@@ -4201,13 +4077,6 @@
error_exit("Must specify options (-o)");
}
- if (qemu_opts_foreach(&qemu_object_opts,
- user_creatable_add_opts_foreach,
- qemu_img_object_print_help, &error_fatal)) {
- ret = -1;
- goto out_no_progress;
- }
-
if (quiet) {
progress = false;
}
@@ -4760,10 +4629,7 @@
merge = true;
break;
case OPTION_OBJECT:
- opts = qemu_opts_parse_noisily(&qemu_object_opts, optarg, true);
- if (!opts) {
- goto out;
- }
+ user_creatable_process_cmdline(optarg);
break;
case OPTION_IMAGE_OPTS:
image_opts = true;
@@ -4771,12 +4637,6 @@
}
}
- if (qemu_opts_foreach(&qemu_object_opts,
- user_creatable_add_opts_foreach,
- qemu_img_object_print_help, &error_fatal)) {
- goto out;
- }
-
if (QSIMPLEQ_EMPTY(&actions)) {
error_report("Need at least one of --add, --remove, --clear, "
"--enable, --disable, or --merge");
@@ -5034,10 +4894,7 @@
force_share = true;
break;
case OPTION_OBJECT:
- if (!qemu_opts_parse_noisily(&qemu_object_opts, optarg, true)) {
- ret = -1;
- goto out;
- }
+ user_creatable_process_cmdline(optarg);
break;
case OPTION_IMAGE_OPTS:
image_opts = true;
@@ -5084,13 +4941,6 @@
goto out;
}
- if (qemu_opts_foreach(&qemu_object_opts,
- user_creatable_add_opts_foreach,
- qemu_img_object_print_help, &error_fatal)) {
- ret = -1;
- goto out;
- }
-
blk1 = img_open(image_opts, in.filename, fmt, 0, false, false,
force_share);
@@ -5311,11 +5161,7 @@
force_share = true;
break;
case OPTION_OBJECT:
- object_opts = qemu_opts_parse_noisily(&qemu_object_opts,
- optarg, true);
- if (!object_opts) {
- goto out;
- }
+ user_creatable_process_cmdline(optarg);
break;
case OPTION_IMAGE_OPTS:
image_opts = true;
@@ -5345,12 +5191,6 @@
}
}
- if (qemu_opts_foreach(&qemu_object_opts,
- user_creatable_add_opts_foreach,
- qemu_img_object_print_help, &error_fatal)) {
- goto out;
- }
-
if (argc - optind > 1) {
error_report("At most one filename argument is allowed.");
goto out;
@@ -5490,7 +5330,6 @@
error_exit("Not enough arguments");
}
- qemu_add_opts(&qemu_object_opts);
qemu_add_opts(&qemu_source_opts);
qemu_add_opts(&qemu_trace_opts);
