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[Qemu-devel] [PATCH 6/7] qemu-nbd: allow specifying image as a set of op
From: |
Daniel P. Berrange |
Subject: |
[Qemu-devel] [PATCH 6/7] qemu-nbd: allow specifying image as a set of options args |
Date: |
Tue, 22 Dec 2015 11:06:28 +0000 |
Currently qemu-nbd allows an image filename to be passed on the
command line, but does not have a way to set any options except
the format eg
qemu-nbd https://127.0.0.1/images/centos7.iso
qemu-nbd /home/berrange/demo.qcow2
This adds a --source arg (that is mutually exclusive with a
positional filename arg and -f arg) that accepts a full option
string, as well as the original syntax eg
qemu-nbd --source driver=http,url=https://127.0.0.1/images,sslverify=off
qemu-nbd --source https://127.0.0.1/images/centos7.iso
qemu-nbd --source file=/home/berrange/demo.qcow2
qemu-nbd --source /home/berrange/demo.qcow2
Signed-off-by: Daniel P. Berrange <address@hidden>
---
qemu-nbd.c | 57 ++++++++++++++++++++++++++++++++++++++++++++++++++-------
1 file changed, 50 insertions(+), 7 deletions(-)
diff --git a/qemu-nbd.c b/qemu-nbd.c
index b4b6681..0b9f99e 100644
--- a/qemu-nbd.c
+++ b/qemu-nbd.c
@@ -49,6 +49,7 @@
#define QEMU_NBD_OPT_DISCARD 3
#define QEMU_NBD_OPT_DETECT_ZEROES 4
#define QEMU_NBD_OPT_OBJECT 5
+#define QEMU_NBD_OPT_SOURCE 6
static NBDExport *exp;
static int verbose;
@@ -387,6 +388,16 @@ static SocketAddress *nbd_build_socket_address(const char
*sockpath,
}
+static QemuOptsList file_opts = {
+ .name = "file",
+ .implied_opt_name = "file",
+ .head = QTAILQ_HEAD_INITIALIZER(file_opts.head),
+ .desc = {
+ /* no elements => accept any params */
+ { /* end of list */ }
+ },
+};
+
static QemuOptsList qemu_object_opts = {
.name = "object",
.implied_opt_name = "qom-type",
@@ -486,6 +497,7 @@ int main(int argc, char **argv)
{ "persistent", 0, NULL, 't' },
{ "verbose", 0, NULL, 'v' },
{ "object", 1, NULL, QEMU_NBD_OPT_OBJECT },
+ { "source", 1, NULL, QEMU_NBD_OPT_SOURCE },
{ NULL, 0, NULL, 0 }
};
int ch;
@@ -657,13 +669,23 @@ int main(int argc, char **argv)
exit(1);
}
break;
+ case QEMU_NBD_OPT_SOURCE:
+ if (srcpath) {
+ errx(EXIT_FAILURE, "--source can only be used once");
+ }
+ if (!qemu_opts_parse_noisily(&file_opts, optarg, true)) {
+ qemu_opts_reset(&file_opts);
+ exit(EXIT_FAILURE);
+ }
+ srcpath = optarg;
+ break;
case '?':
errx(EXIT_FAILURE, "Try `%s --help' for more information.",
argv[0]);
}
}
- if ((argc - optind) != 1) {
+ if ((argc - optind) > 1) {
errx(EXIT_FAILURE, "Invalid number of argument.\n"
"Try `%s --help' for more information.",
argv[0]);
@@ -757,15 +779,36 @@ int main(int argc, char **argv)
bdrv_init();
atexit(bdrv_close_all);
- if (fmt) {
- options = qdict_new();
- qdict_put(options, "driver", qstring_from_str(fmt));
+ if (srcpath) {
+ char *file = NULL;
+ opts = qemu_opts_find(&file_opts, NULL);
+ if (fmt) {
+ errx(EXIT_FAILURE, "--source and -f are mutually exclusive");
+ }
+ if ((argc - optind) > 1) {
+ errx(EXIT_FAILURE, "--source and filename are mutually exclusive");
+ }
+ file = g_strdup(qemu_opt_get(opts, "file"));
+ qemu_opt_unset(opts, "file");
+ options = qemu_opts_to_qdict(opts, NULL);
+ qemu_opts_reset(&file_opts);
+ blk = blk_new_open("hda", file, NULL, options, flags, &local_err);
+ g_free(file);
+ } else {
+ if (fmt) {
+ options = qdict_new();
+ qdict_put(options, "driver", qstring_from_str(fmt));
+ }
+ if ((argc - optind) != 1) {
+ errx(EXIT_FAILURE, "one of --source or filename are expected");
+ }
+
+ srcpath = argv[optind];
+ blk = blk_new_open("hda", srcpath, NULL, options, flags, &local_err);
}
- srcpath = argv[optind];
- blk = blk_new_open("hda", srcpath, NULL, options, flags, &local_err);
if (!blk) {
- errx(EXIT_FAILURE, "Failed to blk_new_open '%s': %s", argv[optind],
+ errx(EXIT_FAILURE, "Failed to blk_new_open '%s': %s", srcpath,
error_get_pretty(local_err));
}
bs = blk_bs(blk);
--
2.5.0
[Qemu-devel] [PATCH 2/7] qemu-img: add support for --object command line arg, Daniel P. Berrange, 2015/12/22
[Qemu-devel] [PATCH 7/7] qemu-img: allow specifying image as a set of options args, Daniel P. Berrange, 2015/12/22