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qemu-io: Let command functions return error code 

This is basically what everything else in the qemu code base does, so we
can do it here, too.

Signed-off-by: Max Reitz <mreitz@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Message-id: 20180509194302.21585-3-mreitz@redhat.com
Signed-off-by: Max Reitz <mreitz@redhat.com>
This commit is contained in:
Max Reitz 2018-05-09 21:42:59 +02:00
parent b444d0e9d1
commit b32d7a39af
3 changed files with 232 additions and 157 deletions
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9
include/qemu-io.h
View File

@ -22,7 +22,12 @@
#define CMD_FLAG_GLOBAL ((int)0x80000000) /* don't iterate "args" */
typedef void (*cfunc_t)(BlockBackend *blk, int argc, char **argv);
/* Implement a qemu-io command.
* Operate on @blk using @argc/@argv as the command's arguments, and
* return 0 on success or negative errno on failure.
*/
typedef int (*cfunc_t)(BlockBackend *blk, int argc, char **argv);
typedef void (*helpfunc_t)(void);
typedef struct cmdinfo {
@ -41,7 +46,7 @@ typedef struct cmdinfo {
extern bool qemuio_misalign;
void qemuio_command(BlockBackend *blk, const char *cmd);
int qemuio_command(BlockBackend *blk, const char *cmd);
void qemuio_add_command(const cmdinfo_t *ci);
void qemuio_command_usage(const cmdinfo_t *ci);

346
qemu-io-cmds.c
View File

File diff suppressed because it is too large Load Diff

34
qemu-io.c
View File

@ -66,10 +66,11 @@ static int get_eof_char(void)
#endif
}
static void close_f(BlockBackend *blk, int argc, char **argv)
static int close_f(BlockBackend *blk, int argc, char **argv)
{
blk_unref(qemuio_blk);
qemuio_blk = NULL;
return 0;
}
static const cmdinfo_t close_cmd = {
@ -136,7 +137,7 @@ static void open_help(void)
"\n");
}
static void open_f(BlockBackend *blk, int argc, char **argv);
static int open_f(BlockBackend *blk, int argc, char **argv);
static const cmdinfo_t open_cmd = {
.name = "open",
@ -160,12 +161,13 @@ static QemuOptsList empty_opts = {
},
};
static void open_f(BlockBackend *blk, int argc, char **argv)
static int open_f(BlockBackend *blk, int argc, char **argv)
{
int flags = BDRV_O_UNMAP;
int readonly = 0;
bool writethrough = true;
int c;
int ret;
QemuOpts *qopts;
QDict *opts;
bool force_share = false;
@ -192,25 +194,25 @@ static void open_f(BlockBackend *blk, int argc, char **argv)
if (bdrv_parse_cache_mode(optarg, &flags, &writethrough) < 0) {
error_report("Invalid cache option: %s", optarg);
qemu_opts_reset(&empty_opts);
return;
return -EINVAL;
}
break;
case 'd':
if (bdrv_parse_discard_flags(optarg, &flags) < 0) {
error_report("Invalid discard option: %s", optarg);
qemu_opts_reset(&empty_opts);
return;
return -EINVAL;
}
break;
case 'o':
if (imageOpts) {
printf("--image-opts and 'open -o' are mutually exclusive\n");
qemu_opts_reset(&empty_opts);
return;
return -EINVAL;
}
if (!qemu_opts_parse_noisily(&empty_opts, optarg, false)) {
qemu_opts_reset(&empty_opts);
return;
return -EINVAL;
}
break;
case 'U':
@ -219,7 +221,7 @@ static void open_f(BlockBackend *blk, int argc, char **argv)
default:
qemu_opts_reset(&empty_opts);
qemuio_command_usage(&open_cmd);
return;
return -EINVAL;
}
}
@ -230,7 +232,7 @@ static void open_f(BlockBackend *blk, int argc, char **argv)
if (imageOpts && (optind == argc - 1)) {
if (!qemu_opts_parse_noisily(&empty_opts, argv[optind], false)) {
qemu_opts_reset(&empty_opts);
return;
return -EINVAL;
}
optind++;
}
@ -240,18 +242,26 @@ static void open_f(BlockBackend *blk, int argc, char **argv)
qemu_opts_reset(&empty_opts);
if (optind == argc - 1) {
openfile(argv[optind], flags, writethrough, force_share, opts);
ret = openfile(argv[optind], flags, writethrough, force_share, opts);
} else if (optind == argc) {
openfile(NULL, flags, writethrough, force_share, opts);
ret = openfile(NULL, flags, writethrough, force_share, opts);
} else {
qobject_unref(opts);
qemuio_command_usage(&open_cmd);
return -EINVAL;
}
if (ret) {
return -EINVAL;
}
return 0;
}
static void quit_f(BlockBackend *blk, int argc, char **argv)
static int quit_f(BlockBackend *blk, int argc, char **argv)
{
quit_qemu_io = true;
return 0;
}
static const cmdinfo_t quit_cmd = {