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authorMax Reitz <mreitz@redhat.com>2013-10-11 14:02:10 +0200
committerKevin Wolf <kwolf@redhat.com>2013-10-11 16:50:02 +0200
commitb543c5cdcb818ffed90cfc97aa8e297214650d84 (patch)
tree265d644263722e01aba3b1b29d22723f053e3ecd /qemu-io.c
parent899f1ae219d5eaa96a53c996026cb0178d62a86d (diff)
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qemu-io: Let "open" pass options to block driver
Add an option to the open command to specify runtime options for the block driver used. Signed-off-by: Max Reitz <mreitz@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Diffstat (limited to 'qemu-io.c')
-rw-r--r--qemu-io.c39
1 files changed, 31 insertions, 8 deletions
diff --git a/qemu-io.c b/qemu-io.c
index f4b8efc..3b3340a 100644
--- a/qemu-io.c
+++ b/qemu-io.c
@@ -16,6 +16,8 @@
#include "qemu-io.h"
#include "qemu/main-loop.h"
+#include "qemu/option.h"
+#include "qemu/config-file.h"
#include "block/block_int.h"
#include "trace/control.h"
@@ -44,7 +46,7 @@ static const cmdinfo_t close_cmd = {
.oneline = "close the current open file",
};
-static int openfile(char *name, int flags, int growable)
+static int openfile(char *name, int flags, int growable, QDict *opts)
{
Error *local_err = NULL;
@@ -54,7 +56,7 @@ static int openfile(char *name, int flags, int growable)
}
if (growable) {
- if (bdrv_file_open(&qemuio_bs, name, NULL, flags, &local_err)) {
+ if (bdrv_file_open(&qemuio_bs, name, opts, flags, &local_err)) {
fprintf(stderr, "%s: can't open device %s: %s\n", progname, name,
error_get_pretty(local_err));
error_free(local_err);
@@ -63,7 +65,7 @@ static int openfile(char *name, int flags, int growable)
} else {
qemuio_bs = bdrv_new("hda");
- if (bdrv_open(qemuio_bs, name, NULL, flags, NULL, &local_err) < 0) {
+ if (bdrv_open(qemuio_bs, name, opts, flags, NULL, &local_err) < 0) {
fprintf(stderr, "%s: can't open device %s: %s\n", progname, name,
error_get_pretty(local_err));
error_free(local_err);
@@ -89,7 +91,8 @@ static void open_help(void)
" -r, -- open file read-only\n"
" -s, -- use snapshot file\n"
" -n, -- disable host cache\n"
-" -g, -- allow file to grow (only applies to protocols)"
+" -g, -- allow file to grow (only applies to protocols)\n"
+" -o, -- options to be given to the block driver"
"\n");
}
@@ -102,19 +105,30 @@ static const cmdinfo_t open_cmd = {
.argmin = 1,
.argmax = -1,
.flags = CMD_NOFILE_OK,
- .args = "[-Crsn] [path]",
+ .args = "[-Crsn] [-o options] [path]",
.oneline = "open the file specified by path",
.help = open_help,
};
+static QemuOptsList empty_opts = {
+ .name = "drive",
+ .head = QTAILQ_HEAD_INITIALIZER(empty_opts.head),
+ .desc = {
+ /* no elements => accept any params */
+ { /* end of list */ }
+ },
+};
+
static int open_f(BlockDriverState *bs, int argc, char **argv)
{
int flags = 0;
int readonly = 0;
int growable = 0;
int c;
+ QemuOpts *qopts;
+ QDict *opts = NULL;
- while ((c = getopt(argc, argv, "snrg")) != EOF) {
+ while ((c = getopt(argc, argv, "snrgo:")) != EOF) {
switch (c) {
case 's':
flags |= BDRV_O_SNAPSHOT;
@@ -128,6 +142,15 @@ static int open_f(BlockDriverState *bs, int argc, char **argv)
case 'g':
growable = 1;
break;
+ case 'o':
+ qopts = qemu_opts_parse(&empty_opts, optarg, 0);
+ if (qopts == NULL) {
+ printf("could not parse option list -- %s\n", optarg);
+ return 0;
+ }
+ opts = qemu_opts_to_qdict(qopts, opts);
+ qemu_opts_del(qopts);
+ break;
default:
return qemuio_command_usage(&open_cmd);
}
@@ -141,7 +164,7 @@ static int open_f(BlockDriverState *bs, int argc, char **argv)
return qemuio_command_usage(&open_cmd);
}
- return openfile(argv[optind], flags, growable);
+ return openfile(argv[optind], flags, growable, opts);
}
static int quit_f(BlockDriverState *bs, int argc, char **argv)
@@ -418,7 +441,7 @@ int main(int argc, char **argv)
}
if ((argc - optind) == 1) {
- openfile(argv[optind], flags, growable);
+ openfile(argv[optind], flags, growable, NULL);
}
command_loop();