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qemu-io: Add --force-share option 

Add --force-share/-U to program options and -U to open subcommand.

Signed-off-by: Fam Zheng <famz@redhat.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Fam Zheng 2017-05-03 00:35:41 +08:00 committed by Kevin Wolf
parent a8d16f9ca2
commit 459571f7b2
1 changed files with 34 additions and 8 deletions
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42
qemu-io.c
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@ -20,6 +20,7 @@
#include "qemu/readline.h"
#include "qemu/log.h"
#include "qapi/qmp/qstring.h"
#include "qapi/qmp/qbool.h"
#include "qom/object_interfaces.h"
#include "sysemu/block-backend.h"
#include "block/block_int.h"
@ -53,7 +54,8 @@ static const cmdinfo_t close_cmd = {
.oneline = "close the current open file",
};
static int openfile(char *name, int flags, bool writethrough, QDict *opts)
static int openfile(char *name, int flags, bool writethrough, bool force_share,
QDict *opts)
{
Error *local_err = NULL;
BlockDriverState *bs;
@ -64,6 +66,18 @@ static int openfile(char *name, int flags, bool writethrough, QDict *opts)
return 1;
}
if (force_share) {
if (!opts) {
opts = qdict_new();
}
if (qdict_haskey(opts, BDRV_OPT_FORCE_SHARE)
&& !qdict_get_bool(opts, BDRV_OPT_FORCE_SHARE)) {
error_report("-U conflicts with image options");
QDECREF(opts);
return 1;
}
qdict_put(opts, BDRV_OPT_FORCE_SHARE, qbool_from_bool(true));
}
qemuio_blk = blk_new_open(name, NULL, opts, flags, &local_err);
if (!qemuio_blk) {
error_reportf_err(local_err, "can't open%s%s: ",
@ -108,6 +122,7 @@ static void open_help(void)
" -r, -- open file read-only\n"
" -s, -- use snapshot file\n"
" -n, -- disable host cache, short for -t none\n"
" -U, -- force shared permissions\n"
" -k, -- use kernel AIO implementation (on Linux only)\n"
" -t, -- use the given cache mode for the image\n"
" -d, -- use the given discard mode for the image\n"
@ -124,7 +139,7 @@ static const cmdinfo_t open_cmd = {
.argmin = 1,
.argmax = -1,
.flags = CMD_NOFILE_OK,
.args = "[-rsnk] [-t cache] [-d discard] [-o options] [path]",
.args = "[-rsnkU] [-t cache] [-d discard] [-o options] [path]",
.oneline = "open the file specified by path",
.help = open_help,
};
@ -147,8 +162,9 @@ static int open_f(BlockBackend *blk, int argc, char **argv)
int c;
QemuOpts *qopts;
QDict *opts;
bool force_share = false;
while ((c = getopt(argc, argv, "snro:kt:d:")) != -1) {
while ((c = getopt(argc, argv, "snro:kt:d:U")) != -1) {
switch (c) {
case 's':
flags |= BDRV_O_SNAPSHOT;
@ -188,6 +204,9 @@ static int open_f(BlockBackend *blk, int argc, char **argv)
return 0;
}
break;
case 'U':
force_share = true;
break;
default:
qemu_opts_reset(&empty_opts);
return qemuio_command_usage(&open_cmd);
@ -211,9 +230,9 @@ static int open_f(BlockBackend *blk, int argc, char **argv)
qemu_opts_reset(&empty_opts);
if (optind == argc - 1) {
return openfile(argv[optind], flags, writethrough, opts);
return openfile(argv[optind], flags, writethrough, force_share, opts);
} else if (optind == argc) {
return openfile(NULL, flags, writethrough, opts);
return openfile(NULL, flags, writethrough, force_share, opts);
} else {
QDECREF(opts);
return qemuio_command_usage(&open_cmd);
@ -257,6 +276,7 @@ static void usage(const char *name)
" -T, --trace [[enable=]<pattern>][,events=<file>][,file=<file>]\n"
" specify tracing options\n"
" see qemu-img(1) man page for full description\n"
" -U, --force-share force shared permissions\n"
" -h, --help display this help and exit\n"
" -V, --version output version information and exit\n"
"\n"
@ -436,7 +456,7 @@ static QemuOptsList file_opts = {
int main(int argc, char **argv)
{
int readonly = 0;
const char *sopt = "hVc:d:f:rsnmkt:T:";
const char *sopt = "hVc:d:f:rsnmkt:T:U";
const struct option lopt[] = {
{ "help", no_argument, NULL, 'h' },
{ "version", no_argument, NULL, 'V' },
@ -452,6 +472,7 @@ int main(int argc, char **argv)
{ "trace", required_argument, NULL, 'T' },
{ "object", required_argument, NULL, OPTION_OBJECT },
{ "image-opts", no_argument, NULL, OPTION_IMAGE_OPTS },
{ "force-share", no_argument, 0, 'U'},
{ NULL, 0, NULL, 0 }
};
int c;
@ -462,6 +483,7 @@ int main(int argc, char **argv)
QDict *opts = NULL;
const char *format = NULL;
char *trace_file = NULL;
bool force_share = false;
#ifdef CONFIG_POSIX
signal(SIGPIPE, SIG_IGN);
@ -524,6 +546,9 @@ int main(int argc, char **argv)
case 'h':
usage(progname);
exit(0);
case 'U':
force_share = true;
break;
case OPTION_OBJECT: {
QemuOpts *qopts;
qopts = qemu_opts_parse_noisily(&qemu_object_opts,
@ -595,7 +620,7 @@ int main(int argc, char **argv)
exit(1);
}
opts = qemu_opts_to_qdict(qopts, NULL);
if (openfile(NULL, flags, writethrough, opts)) {
if (openfile(NULL, flags, writethrough, force_share, opts)) {
exit(1);
}
} else {
@ -603,7 +628,8 @@ int main(int argc, char **argv)
opts = qdict_new();
qdict_put_str(opts, "driver", format);
}
if (openfile(argv[optind], flags, writethrough, opts)) {
if (openfile(argv[optind], flags, writethrough,
force_share, opts)) {
exit(1);
}
}