yeahuh / rpms / qemu-kvm

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From 0ba83ccbe597ebcaca69a3363d8bc2a5dd74e0c7 Mon Sep 17 00:00:00 2001
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From: Max Reitz <mreitz@redhat.com>
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Date: Sun, 29 Dec 2013 22:06:53 +0100
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Subject: [PATCH 2/8] qemu-io: Let "open" pass options to block driver
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RH-Author: Max Reitz <mreitz@redhat.com>
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Message-id: <1388354817-3013-2-git-send-email-mreitz@redhat.com>
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Patchwork-id: 56443
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O-Subject: [RHEL-7.0 qemu-kvm PATCH 1/5] qemu-io: Let "open" pass options to block driver
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Bugzilla: 1004347
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RH-Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
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RH-Acked-by: Fam Zheng <famz@redhat.com>
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RH-Acked-by: Kevin Wolf <kwolf@redhat.com>
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BZ: 1004347
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Add an option to the open command to specify runtime options for the
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block driver used.
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Signed-off-by: Max Reitz <mreitz@redhat.com>
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Signed-off-by: Kevin Wolf <kwolf@redhat.com>
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(cherry picked from commit b543c5cdcb818ffed90cfc97aa8e297214650d84)
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Signed-off-by: Max Reitz <mreitz@redhat.com>
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Conflicts:
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	qemu-io.c
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Conflicts because 797ac58cb2093ab9192d8998a1fef85d87cc8661 has not been
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backported, which splits qemu-io-cmds.c from qemu-io.c.
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---
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 qemu-io.c | 39 +++++++++++++++++++++++++++++++--------
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 1 file changed, 31 insertions(+), 8 deletions(-)
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Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
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---
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 qemu-io.c |   39 +++++++++++++++++++++++++++++++--------
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 1 files changed, 31 insertions(+), 8 deletions(-)
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diff --git a/qemu-io.c b/qemu-io.c
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index 393c2c8..64b060c 100644
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--- a/qemu-io.c
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+++ b/qemu-io.c
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@@ -16,6 +16,8 @@
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 #include "qemu-common.h"
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 #include "qemu/main-loop.h"
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+#include "qemu/option.h"
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+#include "qemu/config-file.h"
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 #include "block/block_int.h"
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 #include "block/qapi.h"
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 #include "cmd.h"
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@@ -1771,7 +1773,7 @@ static const cmdinfo_t close_cmd = {
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     .oneline    = "close the current open file",
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 };
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-static int openfile(char *name, int flags, int growable)
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+static int openfile(char *name, int flags, int growable, QDict *opts)
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 {
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     Error *local_err = NULL;
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@@ -1781,7 +1783,7 @@ static int openfile(char *name, int flags, int growable)
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     }
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     if (growable) {
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-        if (bdrv_file_open(&bs, name, NULL, flags, &local_err)) {
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+        if (bdrv_file_open(&bs, name, opts, flags, &local_err)) {
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             fprintf(stderr, "%s: can't open device %s: %s\n", progname, name,
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                     error_get_pretty(local_err));
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             error_free(local_err);
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@@ -1790,7 +1792,7 @@ static int openfile(char *name, int flags, int growable)
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     } else {
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         bs = bdrv_new("hda");
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-        if (bdrv_open(bs, name, NULL, flags, NULL, &local_err) < 0) {
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+        if (bdrv_open(bs, name, opts, flags, NULL, &local_err) < 0) {
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             fprintf(stderr, "%s: can't open device %s: %s\n", progname, name,
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                     error_get_pretty(local_err));
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             error_free(local_err);
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@@ -1816,7 +1818,8 @@ static void open_help(void)
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 " -r, -- open file read-only\n"
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 " -s, -- use snapshot file\n"
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 " -n, -- disable host cache\n"
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-" -g, -- allow file to grow (only applies to protocols)"
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+" -g, -- allow file to grow (only applies to protocols)\n"
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+" -o, -- options to be given to the block driver"
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 "\n");
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 }
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@@ -1829,19 +1832,30 @@ static const cmdinfo_t open_cmd = {
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     .argmin     = 1,
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     .argmax     = -1,
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     .flags      = CMD_NOFILE_OK,
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-    .args       = "[-Crsn] [path]",
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+    .args       = "[-Crsn] [-o options] [path]",
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     .oneline    = "open the file specified by path",
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     .help       = open_help,
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 };
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+static QemuOptsList empty_opts = {
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+    .name = "drive",
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+    .head = QTAILQ_HEAD_INITIALIZER(empty_opts.head),
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+    .desc = {
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+        /* no elements => accept any params */
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+        { /* end of list */ }
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+    },
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+};
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+
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 static int open_f(int argc, char **argv)
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 {
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     int flags = 0;
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     int readonly = 0;
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     int growable = 0;
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     int c;
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+    QemuOpts *qopts;
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+    QDict *opts = NULL;
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-    while ((c = getopt(argc, argv, "snrg")) != EOF) {
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+    while ((c = getopt(argc, argv, "snrgo:")) != EOF) {
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         switch (c) {
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         case 's':
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             flags |= BDRV_O_SNAPSHOT;
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@@ -1855,6 +1869,15 @@ static int open_f(int argc, char **argv)
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         case 'g':
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             growable = 1;
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             break;
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+        case 'o':
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+            qopts = qemu_opts_parse(&empty_opts, optarg, 0);
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+            if (qopts == NULL) {
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+                printf("could not parse option list -- %s\n", optarg);
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+                return 0;
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+            }
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+            opts = qemu_opts_to_qdict(qopts, opts);
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+            qemu_opts_del(qopts);
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+            break;
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         default:
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             return command_usage(&open_cmd);
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         }
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@@ -1868,7 +1891,7 @@ static int open_f(int argc, char **argv)
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         return command_usage(&open_cmd);
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     }
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-    return openfile(argv[optind], flags, growable);
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+    return openfile(argv[optind], flags, growable, opts);
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 }
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 static int init_args_command(int index)
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@@ -2039,7 +2062,7 @@ int main(int argc, char **argv)
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     }
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     if ((argc - optind) == 1) {
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-        openfile(argv[optind], flags, growable);
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+        openfile(argv[optind], flags, growable, NULL);
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     }
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     command_loop();
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-- 
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1.7.1
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