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qemu-img: Suppress unhelpful extra errors in convert, amend

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img_convert() and img_amend() use qemu_opts_do_parse(), which reports
errors with qerror_report_err().  Its error messages aren't helpful
here, the caller reports one that actually makes sense.  Reproducer:

    $ qemu-img convert -o backing_format=raw in.img out.img
    qemu-img: Invalid parameter 'backing_format'
    qemu-img: Invalid options for file format 'raw'

To fix, propagate errors through qemu_opts_do_parse().  This lifts the
error reporting into callers.  Drop it from img_convert() and
img_amend(), keep it in qemu_chr_parse_compat(), bdrv_img_create().

Since I'm touching qemu_opts_do_parse() anyway, write a function
comment for it.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
This commit is contained in:
Markus Armbruster 2015-02-12 18:37:11 +01:00
parent 4f81273dd9
commit dc523cd348
5 changed files with 40 additions and 22 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
block.c
View File

@ -5653,7 +5653,10 @@ void bdrv_img_create(const char *filename, const char *fmt,
/* Parse -o options */
if (options) {
if (qemu_opts_do_parse(opts, options, NULL) != 0) {
qemu_opts_do_parse(opts, options, NULL, &local_err);
if (local_err) {
error_report_err(local_err);
local_err = NULL;
error_setg(errp, "Invalid options for file format '%s'", fmt);
goto out;
}

3
include/qemu/option.h
View File

@ -115,7 +115,8 @@ const char *qemu_opts_id(QemuOpts *opts);
void qemu_opts_set_id(QemuOpts *opts, char *id);
void qemu_opts_del(QemuOpts *opts);
void qemu_opts_validate(QemuOpts *opts, const QemuOptDesc *desc, Error **errp);
int qemu_opts_do_parse(QemuOpts *opts, const char *params, const char *firstname);
void qemu_opts_do_parse(QemuOpts *opts, const char *params,
const char *firstname, Error **errp);
QemuOpts *qemu_opts_parse(QemuOptsList *list, const char *params, int permit_abbrev);
void qemu_opts_set_defaults(QemuOptsList *list, const char *params,
int permit_abbrev);

10
qemu-char.c
View File

@ -3379,8 +3379,11 @@ QemuOpts *qemu_chr_parse_compat(const char *label, const char *filename)
qemu_opt_set(opts, "host", host, &error_abort);
qemu_opt_set(opts, "port", port, &error_abort);
if (p[pos] == ',') {
if (qemu_opts_do_parse(opts, p+pos+1, NULL) != 0)
qemu_opts_do_parse(opts, p+pos+1, NULL, &local_err);
if (local_err) {
error_report_err(local_err);
goto fail;
}
}
if (strstart(filename, "telnet:", &p))
qemu_opt_set(opts, "telnet", "on", &error_abort);
@ -3411,8 +3414,11 @@ QemuOpts *qemu_chr_parse_compat(const char *label, const char *filename)
}
if (strstart(filename, "unix:", &p)) {
qemu_opt_set(opts, "backend", "socket", &error_abort);
if (qemu_opts_do_parse(opts, p, "path") != 0)
qemu_opts_do_parse(opts, p, "path", &local_err);
if (local_err) {
error_report_err(local_err);
goto fail;
}
return opts;
}
if (strstart(filename, "/dev/parport", NULL) ||

25
qemu-img.c
View File

@ -1550,10 +1550,14 @@ static int img_convert(int argc, char **argv)
create_opts = qemu_opts_append(create_opts, proto_drv->create_opts);
opts = qemu_opts_create(create_opts, NULL, 0, &error_abort);
if (options && qemu_opts_do_parse(opts, options, NULL)) {
error_report("Invalid options for file format '%s'", out_fmt);
ret = -1;
goto out;
if (options) {
qemu_opts_do_parse(opts, options, NULL, &local_err);
if (local_err) {
error_report("Invalid options for file format '%s'", out_fmt);
error_free(local_err);
ret = -1;
goto out;
}
}
qemu_opt_set_number(opts, BLOCK_OPT_SIZE, total_sectors * 512,
@ -2887,6 +2891,7 @@ static void amend_status_cb(BlockDriverState *bs,
static int img_amend(int argc, char **argv)
{
Error *err = NULL;
int c, ret = 0;
char *options = NULL;
QemuOptsList *create_opts = NULL;
@ -2992,10 +2997,14 @@ static int img_amend(int argc, char **argv)
create_opts = qemu_opts_append(create_opts, bs->drv->create_opts);
opts = qemu_opts_create(create_opts, NULL, 0, &error_abort);
if (options && qemu_opts_do_parse(opts, options, NULL)) {
error_report("Invalid options for file format '%s'", fmt);
ret = -1;
goto out;
if (options) {
qemu_opts_do_parse(opts, options, NULL, &err);
if (err) {
error_report("Invalid options for file format '%s'", fmt);
error_free(err);
ret = -1;
goto out;
}
}
/* In case the driver does not call amend_status_cb() */

19
util/qemu-option.c
View File

@ -799,17 +799,16 @@ static void opts_do_parse(QemuOpts *opts, const char *params,
}
}
int qemu_opts_do_parse(QemuOpts *opts, const char *params, const char *firstname)
/**
* Store options parsed from @params into @opts.
* If @firstname is non-null, the first key=value in @params may omit
* key=, and is treated as if key was @firstname.
* On error, store an error object through @errp if non-null.
*/
void qemu_opts_do_parse(QemuOpts *opts, const char *params,
const char *firstname, Error **errp)
{
Error *err = NULL;
opts_do_parse(opts, params, firstname, false, &err);
if (err) {
qerror_report_err(err);
error_free(err);
return -1;
}
return 0;
opts_do_parse(opts, params, firstname, false, errp);
}
static QemuOpts *opts_parse(QemuOptsList *list, const char *params,