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From 6d981002b5ccbcb4905e5fa45b4606cf4ddc9c9e Mon Sep 17 00:00:00 2001
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From: Amos Kong <akong@redhat.com>
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Date: Tue, 25 Feb 2014 07:56:50 +0100
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Subject: [PATCH 1/6] qmp: access the local QemuOptsLists for drive option
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RH-Author: Amos Kong <akong@redhat.com>
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Message-id: <1393315010-20614-1-git-send-email-akong@redhat.com>
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Patchwork-id: 57771
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O-Subject: [RHEL-7.0 qemu-kvm PATCH v3] qmp: access the local QemuOptsLists for drive option
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Bugzilla: 1026184
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RH-Acked-by: Paolo Bonzini <pbonzini@redhat.com>
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RH-Acked-by: Eduardo Habkost <ehabkost@redhat.com>
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RH-Acked-by: Fam Zheng <famz@redhat.com>
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Bugzilla: 1026184
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Brew: http://brewweb.devel.redhat.com/brew/taskinfo?taskID=7104270
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Currently we have three QemuOptsList (qemu_common_drive_opts,
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qemu_legacy_drive_opts, and qemu_drive_opts), only qemu_drive_opts
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is added to vm_config_groups[].
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This patch changes query-command-line-options to access three local
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QemuOptsLists for drive option, and merge the description items
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together.
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Signed-off-by: Amos Kong <akong@redhat.com>
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Signed-off-by: Kevin Wolf <kwolf@redhat.com>
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(cherry picked from commit 968854c8a106243eae7a68394ce1cb85dc138837)
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---
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v2: re-backport when patch is merged to mainline
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v3: rebase to latest qemu-kvm-rhel7
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---
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redo/fix query-command-line-options isn't finished, let's fix the
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blkdev issue in rhel7.0 by this backport.
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---
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 blockdev.c                 |    1 -
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 include/qemu/config-file.h |    1 +
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 include/sysemu/sysemu.h    |    2 +
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 util/qemu-config.c         |   77 +++++++++++++++++++++++++++++++++++++++++++-
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 vl.c                       |    3 ++
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 5 files changed, 82 insertions(+), 2 deletions(-)
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Signed-off-by: Miroslav Rezanina <mrezanin@redhat.com>
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---
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 blockdev.c                 |    1 -
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 include/qemu/config-file.h |    1 +
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 include/sysemu/sysemu.h    |    2 +
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 util/qemu-config.c         |   77 +++++++++++++++++++++++++++++++++++++++++++-
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 vl.c                       |    3 ++
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 5 files changed, 82 insertions(+), 2 deletions(-)
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diff --git a/blockdev.c b/blockdev.c
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index 80c6bb4..e51203c 100644
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--- a/blockdev.c
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+++ b/blockdev.c
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@@ -47,7 +47,6 @@
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 #include "sysemu/arch_init.h"
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 static QTAILQ_HEAD(drivelist, DriveInfo) drives = QTAILQ_HEAD_INITIALIZER(drives);
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-extern QemuOptsList qemu_common_drive_opts;
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 static const char *const if_name[IF_COUNT] = {
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     [IF_NONE] = "none",
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diff --git a/include/qemu/config-file.h b/include/qemu/config-file.h
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index ccfccae..3f92282 100644
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--- a/include/qemu/config-file.h
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+++ b/include/qemu/config-file.h
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@@ -9,6 +9,7 @@
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 QemuOptsList *qemu_find_opts(const char *group);
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 QemuOptsList *qemu_find_opts_err(const char *group, Error **errp);
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 void qemu_add_opts(QemuOptsList *list);
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+void qemu_add_drive_opts(QemuOptsList *list);
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 int qemu_set_option(const char *str);
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 int qemu_global_option(const char *str);
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 void qemu_add_globals(void);
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diff --git a/include/sysemu/sysemu.h b/include/sysemu/sysemu.h
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index c70d2dd..8dc0a4c 100644
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--- a/include/sysemu/sysemu.h
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+++ b/include/sysemu/sysemu.h
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@@ -191,6 +191,8 @@ QemuOpts *qemu_get_machine_opts(void);
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 bool usb_enabled(bool default_usb);
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+extern QemuOptsList qemu_legacy_drive_opts;
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+extern QemuOptsList qemu_common_drive_opts;
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 extern QemuOptsList qemu_drive_opts;
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 extern QemuOptsList qemu_simple_drive_opts;
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 extern QemuOptsList qemu_chardev_opts;
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diff --git a/util/qemu-config.c b/util/qemu-config.c
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index a59568d..04da942 100644
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--- a/util/qemu-config.c
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+++ b/util/qemu-config.c
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@@ -8,6 +8,7 @@
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 #include "qmp-commands.h"
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 static QemuOptsList *vm_config_groups[32];
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+static QemuOptsList *drive_config_groups[4];
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 static QemuOptsList *find_list(QemuOptsList **lists, const char *group,
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                                Error **errp)
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@@ -77,6 +78,59 @@ static CommandLineParameterInfoList *query_option_descs(const QemuOptDesc *desc)
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     return param_list;
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 }
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+/* remove repeated entry from the info list */
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+static void cleanup_infolist(CommandLineParameterInfoList *head)
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+{
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+    CommandLineParameterInfoList *pre_entry, *cur, *del_entry;
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+
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+    cur = head;
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+    while (cur->next) {
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+        pre_entry = head;
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+        while (pre_entry != cur->next) {
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+            if (!strcmp(pre_entry->value->name, cur->next->value->name)) {
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+                del_entry = cur->next;
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+                cur->next = cur->next->next;
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+                g_free(del_entry);
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+                break;
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+            }
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+            pre_entry = pre_entry->next;
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+        }
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+        cur = cur->next;
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+    }
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+}
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+
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+/* merge the description items of two parameter infolists */
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+static void connect_infolist(CommandLineParameterInfoList *head,
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+                             CommandLineParameterInfoList *new)
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+{
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+    CommandLineParameterInfoList *cur;
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+
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+    cur = head;
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+    while (cur->next) {
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+        cur = cur->next;
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+    }
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+    cur->next = new;
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+}
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+
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+/* access all the local QemuOptsLists for drive option */
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+static CommandLineParameterInfoList *get_drive_infolist(void)
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+{
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+    CommandLineParameterInfoList *head = NULL, *cur;
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+    int i;
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+
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+    for (i = 0; drive_config_groups[i] != NULL; i++) {
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+        if (!head) {
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+            head = query_option_descs(drive_config_groups[i]->desc);
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+        } else {
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+            cur = query_option_descs(drive_config_groups[i]->desc);
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+            connect_infolist(head, cur);
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+        }
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+    }
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+    cleanup_infolist(head);
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+
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+    return head;
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+}
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+
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 CommandLineOptionInfoList *qmp_query_command_line_options(bool has_option,
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                                                           const char *option,
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                                                           Error **errp)
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@@ -89,7 +143,12 @@ CommandLineOptionInfoList *qmp_query_command_line_options(bool has_option,
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         if (!has_option || !strcmp(option, vm_config_groups[i]->name)) {
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             info = g_malloc0(sizeof(*info));
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             info->option = g_strdup(vm_config_groups[i]->name);
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-            info->parameters = query_option_descs(vm_config_groups[i]->desc);
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+            if (!strcmp("drive", vm_config_groups[i]->name)) {
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+                info->parameters = get_drive_infolist();
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+            } else {
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+                info->parameters =
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+                    query_option_descs(vm_config_groups[i]->desc);
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+            }
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             entry = g_malloc0(sizeof(*entry));
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             entry->value = info;
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             entry->next = conf_list;
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@@ -109,6 +168,22 @@ QemuOptsList *qemu_find_opts_err(const char *group, Error **errp)
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     return find_list(vm_config_groups, group, errp);
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 }
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+void qemu_add_drive_opts(QemuOptsList *list)
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+{
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+    int entries, i;
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+
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+    entries = ARRAY_SIZE(drive_config_groups);
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+    entries--; /* keep list NULL terminated */
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+    for (i = 0; i < entries; i++) {
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+        if (drive_config_groups[i] == NULL) {
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+            drive_config_groups[i] = list;
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+            return;
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+        }
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+    }
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+    fprintf(stderr, "ran out of space in drive_config_groups");
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+    abort();
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+}
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+
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 void qemu_add_opts(QemuOptsList *list)
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 {
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     int entries, i;
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diff --git a/vl.c b/vl.c
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index deb5884..51300e7 100644
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--- a/vl.c
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+++ b/vl.c
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@@ -2851,6 +2851,9 @@ int main(int argc, char **argv, char **envp)
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     qemu_add_opts(&qemu_drive_opts);
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     qemu_add_opts(&qemu_simple_drive_opts);
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+    qemu_add_drive_opts(&qemu_legacy_drive_opts);
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+    qemu_add_drive_opts(&qemu_common_drive_opts);
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+    qemu_add_drive_opts(&qemu_drive_opts);
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     qemu_add_opts(&qemu_chardev_opts);
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     qemu_add_opts(&qemu_device_opts);
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     qemu_add_opts(&qemu_netdev_opts);
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-- 
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1.7.1
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