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os-posix: Allow 'chroot' via '-run-with' and deprecate the old '-chroot' option

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We recently introduced "-run-with" for options that influence the
runtime behavior of QEMU. This option has the big advantage that it
can group related options (so that it is easier for the users to spot
them) and that the options become introspectable via QMP this way.
So let's start moving more switches into this option group, starting
with "-chroot" now.

Reviewed-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
Reviewed-by: Michael Tokarev <mjt@tls.msk.ru>
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Message-Id: <20230703074447.17044-1-thuth@redhat.com>
Signed-off-by: Thomas Huth <thuth@redhat.com>
This commit is contained in:
Thomas Huth
2023-07-03 09:44:47 +02:00
parent bc55e2eaa6
commit 9ffcbe2a60
4 changed files with 52 additions and 27 deletions
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35
os-posix.c
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@ -38,6 +38,7 @@
#include "qemu/cutils.h"
#include "qemu/config-file.h"
#include "qemu/option.h"
#include "qemu/module.h"
#ifdef CONFIG_LINUX
#include <sys/prctl.h>
@ -148,6 +149,7 @@ int os_parse_cmd_args(int index, const char *optarg)
}
break;
case QEMU_OPTION_chroot:
warn_report("option is deprecated, use '-run-with chroot=...' instead");
chroot_dir = optarg;
break;
case QEMU_OPTION_daemonize:
@ -158,18 +160,25 @@ int os_parse_cmd_args(int index, const char *optarg)
case QEMU_OPTION_asyncteardown:
init_async_teardown();
break;
#endif
case QEMU_OPTION_run_with: {
const char *str;
QemuOpts *opts = qemu_opts_parse_noisily(qemu_find_opts("run-with"),
optarg, false);
if (!opts) {
exit(1);
}
#if defined(CONFIG_LINUX)
if (qemu_opt_get_bool(opts, "async-teardown", false)) {
init_async_teardown();
}
#endif
str = qemu_opt_get(opts, "chroot");
if (str) {
chroot_dir = str;
}
break;
}
#endif
default:
return -1;
}
@ -348,3 +357,27 @@ int os_mlock(void)
return -ENOSYS;
#endif
}
static QemuOptsList qemu_run_with_opts = {
.name = "run-with",
.head = QTAILQ_HEAD_INITIALIZER(qemu_run_with_opts.head),
.desc = {
#if defined(CONFIG_LINUX)
{
.name = "async-teardown",
.type = QEMU_OPT_BOOL,
},
#endif
{
.name = "chroot",
.type = QEMU_OPT_STRING,
},
{ /* end of list */ }
},
};
static void register_runwith(void)
{
qemu_add_opts(&qemu_run_with_opts);
}
opts_init(register_runwith);