[Qemu-devel] [PATCH 46/50] qemu-option: Move the implied first name into QemuOptsList

[Markus Armbruster <armbru@redhat.com>]

We sometimes permit omitting the first option name, for example
-device foo is short for -device driver=foo.  The name to use
("driver" in the example) is passed as argument to qemu_opts_parse().
For each QemuOptsList, we use at most one such name.

Move the name into QemuOptsList, and pass whether to permit the
abbreviation.  This ensures continued consistency, and simplifies the
commit after next in this series.

Signed-off-by: Markus Armbruster <armbru@redhat.com>
---
 hw/pci-hotplug.c |    2 +-
 hw/qdev.c        |    2 +-
 hw/usb-net.c     |    2 +-
 net.c            |    4 ++--
 qemu-config.c    |    5 +++++
 qemu-option.c    |    7 ++++++-
 qemu-option.h    |    3 ++-
 vl.c             |   12 ++++++------
 8 files changed, 24 insertions(+), 13 deletions(-)

diff --git a/hw/pci-hotplug.c b/hw/pci-hotplug.c
index d608a85..eb3701b 100644
--- a/hw/pci-hotplug.c
+++ b/hw/pci-hotplug.c
@@ -54,7 +54,7 @@ static PCIDevice *qemu_pci_hot_add_nic(Monitor *mon,
         return NULL;
     }
 
-    opts = qemu_opts_parse(&qemu_net_opts, opts_str ? opts_str : "", NULL);
+    opts = qemu_opts_parse(&qemu_net_opts, opts_str ? opts_str : "", 0);
     if (!opts) {
         monitor_printf(mon, "parsing network options '%s' failed\n",
                        opts_str ? opts_str : "");
diff --git a/hw/qdev.c b/hw/qdev.c
index e3fcc75..1edfce8 100644
--- a/hw/qdev.c
+++ b/hw/qdev.c
@@ -767,7 +767,7 @@ void do_device_add(Monitor *mon, const QDict *qdict)
     QemuOpts *opts;
 
     opts = qemu_opts_parse(&qemu_device_opts,
-                           qdict_get_str(qdict, "config"), "driver");
+                           qdict_get_str(qdict, "config"), 1);
     if (opts) {
         if (qdev_device_help(opts) || qdev_device_add(opts) == NULL) {
             qemu_opts_del(opts);
diff --git a/hw/usb-net.c b/hw/usb-net.c
index 6875f11..4c17435 100644
--- a/hw/usb-net.c
+++ b/hw/usb-net.c
@@ -1478,7 +1478,7 @@ static USBDevice *usb_net_init(const char *cmdline)
     QemuOpts *opts;
     int idx;
 
-    opts = qemu_opts_parse(&qemu_net_opts, cmdline, NULL);
+    opts = qemu_opts_parse(&qemu_net_opts, cmdline, 0);
     if (!opts) {
         return NULL;
     }
diff --git a/net.c b/net.c
index 503af26..f9007cc 100644
--- a/net.c
+++ b/net.c
@@ -1156,7 +1156,7 @@ void net_host_device_add(Monitor *mon, const QDict *qdict)
         return;
     }
 
-    opts = qemu_opts_parse(&qemu_net_opts, opts_str ? opts_str : "", NULL);
+    opts = qemu_opts_parse(&qemu_net_opts, opts_str ? opts_str : "", 0);
     if (!opts) {
         monitor_printf(mon, "parsing network options '%s' failed\n",
                        opts_str ? opts_str : "");
@@ -1361,7 +1361,7 @@ int net_client_parse(QemuOptsList *opts_list, const char *optarg)
     }
 #endif
 
-    if (!qemu_opts_parse(opts_list, optarg, "type")) {
+    if (!qemu_opts_parse(opts_list, optarg, 1)) {
         return -1;
     }
 
diff --git a/qemu-config.c b/qemu-config.c
index ad130fb..a2e0193 100644
--- a/qemu-config.c
+++ b/qemu-config.c
@@ -86,6 +86,7 @@ QemuOptsList qemu_drive_opts = {
 
 QemuOptsList qemu_chardev_opts = {
     .name = "chardev",
+    .implied_opt_name = "backend",
     .head = QTAILQ_HEAD_INITIALIZER(qemu_chardev_opts.head),
     .desc = {
         {
@@ -152,6 +153,7 @@ QemuOptsList qemu_chardev_opts = {
 
 QemuOptsList qemu_device_opts = {
     .name = "device",
+    .implied_opt_name = "driver",
     .head = QTAILQ_HEAD_INITIALIZER(qemu_device_opts.head),
     .desc = {
         /*
@@ -165,6 +167,7 @@ QemuOptsList qemu_device_opts = {
 
 QemuOptsList qemu_netdev_opts = {
     .name = "netdev",
+    .implied_opt_name = "type",
     .head = QTAILQ_HEAD_INITIALIZER(qemu_netdev_opts.head),
     .desc = {
         /*
@@ -177,6 +180,7 @@ QemuOptsList qemu_netdev_opts = {
 
 QemuOptsList qemu_net_opts = {
     .name = "net",
+    .implied_opt_name = "type",
     .head = QTAILQ_HEAD_INITIALIZER(qemu_net_opts.head),
     .desc = {
         /*
@@ -227,6 +231,7 @@ QemuOptsList qemu_global_opts = {
 
 QemuOptsList qemu_mon_opts = {
     .name = "mon",
+    .implied_opt_name = "chardev",
     .head = QTAILQ_HEAD_INITIALIZER(qemu_mon_opts.head),
     .desc = {
         {
diff --git a/qemu-option.c b/qemu-option.c
index 24bb19b..dc340b8 100644
--- a/qemu-option.c
+++ b/qemu-option.c
@@ -753,12 +753,17 @@ int qemu_opts_do_parse(QemuOpts *opts, const char *params, const char *firstname
     return 0;
 }
 
-QemuOpts *qemu_opts_parse(QemuOptsList *list, const char *params, const char *firstname)
+QemuOpts *qemu_opts_parse(QemuOptsList *list, const char *params,
+                          int permit_abbrev)
 {
+    const char *firstname;
     char value[1024], *id = NULL;
     const char *p;
     QemuOpts *opts;
 
+    assert(!permit_abbrev || list->implied_opt_name);
+    firstname = permit_abbrev ? list->implied_opt_name : NULL;
+
     if (strncmp(params, "id=", 3) == 0) {
         get_opt_value(value, sizeof(value), params+3);
         id = qemu_strdup(value);
diff --git a/qemu-option.h b/qemu-option.h
index d735386..58136f3 100644
--- a/qemu-option.h
+++ b/qemu-option.h
@@ -97,6 +97,7 @@ typedef struct QemuOptDesc {
 
 struct QemuOptsList {
     const char *name;
+    const char *implied_opt_name;
     QTAILQ_HEAD(, QemuOpts) head;
     QemuOptDesc desc[];
 };
@@ -118,7 +119,7 @@ const char *qemu_opts_id(QemuOpts *opts);
 void qemu_opts_del(QemuOpts *opts);
 int qemu_opts_validate(QemuOpts *opts, const QemuOptDesc *desc);
 int qemu_opts_do_parse(QemuOpts *opts, const char *params, const char *firstname);
-QemuOpts *qemu_opts_parse(QemuOptsList *list, const char *params, const char *firstname);
+QemuOpts *qemu_opts_parse(QemuOptsList *list, const char *params, int permit_abbrev);
 QemuOpts *qemu_opts_from_qdict(QemuOptsList *list, const QDict *qdict);
 QDict *qemu_opts_to_qdict(QemuOpts *opts, QDict *qdict);
 
diff --git a/vl.c b/vl.c
index 1b58759..d52f5fd 100644
--- a/vl.c
+++ b/vl.c
@@ -1800,7 +1800,7 @@ QemuOpts *drive_add(const char *file, const char *fmt, ...)
     vsnprintf(optstr, sizeof(optstr), fmt, ap);
     va_end(ap);
 
-    opts = qemu_opts_parse(&qemu_drive_opts, optstr, NULL);
+    opts = qemu_opts_parse(&qemu_drive_opts, optstr, 0);
     if (!opts) {
         fprintf(stderr, "%s: huh? duplicate? (%s)\n",
                 __FUNCTION__, optstr);
@@ -4330,7 +4330,7 @@ static int balloon_parse(const char *arg)
     if (!strncmp(arg, "virtio", 6)) {
         if (arg[6] == ',') {
             /* have params -> parse them */
-            opts = qemu_opts_parse(&qemu_device_opts, arg+7, NULL);
+            opts = qemu_opts_parse(&qemu_device_opts, arg+7, 0);
             if (!opts)
                 return  -1;
         } else {
@@ -5317,7 +5317,7 @@ int main(int argc, char **argv, char **envp)
                 default_monitor = 0;
                 break;
             case QEMU_OPTION_mon:
-                opts = qemu_opts_parse(&qemu_mon_opts, optarg, "chardev");
+                opts = qemu_opts_parse(&qemu_mon_opts, optarg, 1);
                 if (!opts) {
                     fprintf(stderr, "parse error: %s\n", optarg);
                     exit(1);
@@ -5325,7 +5325,7 @@ int main(int argc, char **argv, char **envp)
                 default_monitor = 0;
                 break;
             case QEMU_OPTION_chardev:
-                opts = qemu_opts_parse(&qemu_chardev_opts, optarg, "backend");
+                opts = qemu_opts_parse(&qemu_chardev_opts, optarg, 1);
                 if (!opts) {
                     fprintf(stderr, "parse error: %s\n", optarg);
                     exit(1);
@@ -5419,7 +5419,7 @@ int main(int argc, char **argv, char **envp)
                 add_device_config(DEV_USB, optarg);
                 break;
             case QEMU_OPTION_device:
-                if (!qemu_opts_parse(&qemu_device_opts, optarg, "driver")) {
+                if (!qemu_opts_parse(&qemu_device_opts, optarg, 1)) {
                     exit(1);
                 }
                 break;
@@ -5528,7 +5528,7 @@ int main(int argc, char **argv, char **envp)
                 configure_rtc_date_offset(optarg, 1);
                 break;
             case QEMU_OPTION_rtc:
-                opts = qemu_opts_parse(&qemu_rtc_opts, optarg, NULL);
+                opts = qemu_opts_parse(&qemu_rtc_opts, optarg, 0);
                 if (!opts) {
                     fprintf(stderr, "parse error: %s\n", optarg);
                     exit(1);
-- 
1.6.6.1