[Qemu-devel] [PATCH 2/9] chardev: fix QemuOpts lifecycle

[Gerd Hoffmann <kraxel@redhat.com>]

qemu_chr_new_from_opts handles QemuOpts release now, so callers don't
have to worry.  It will either be saved in CharDriverState, then
released in qemu_chr_delete, or in the error case released instantly.

Signed-off-by: Gerd Hoffmann <kraxel@redhat.com>
---
 qemu-char.c |   15 ++++++++++-----
 qemu-char.h |    1 +
 2 files changed, 11 insertions(+), 5 deletions(-)

diff --git a/qemu-char.c b/qemu-char.c
index 713eae9..9bb3a6b 100644
--- a/qemu-char.c
+++ b/qemu-char.c
@@ -2777,13 +2777,13 @@ CharDriverState *qemu_chr_new_from_opts(QemuOpts *opts,
 
     if (qemu_opts_id(opts) == NULL) {
         error_setg(errp, "chardev: no id specified\n");
-        return NULL;
+        goto err;
     }
 
     if (qemu_opt_get(opts, "backend") == NULL) {
         error_setg(errp, "chardev: \"%s\" missing backend\n",
                    qemu_opts_id(opts));
-        return NULL;
+        goto err;
     }
     for (i = 0; i < ARRAY_SIZE(backend_table); i++) {
         if (strcmp(backend_table[i].name, qemu_opt_get(opts, "backend")) == 0)
@@ -2792,14 +2792,14 @@ CharDriverState *qemu_chr_new_from_opts(QemuOpts *opts,
     if (i == ARRAY_SIZE(backend_table)) {
         error_setg(errp, "chardev: backend \"%s\" not found\n",
                    qemu_opt_get(opts, "backend"));
-        return NULL;
+        goto err;
     }
 
     chr = backend_table[i].open(opts);
     if (!chr) {
         error_setg(errp, "chardev: opening backend \"%s\" failed\n",
                    qemu_opt_get(opts, "backend"));
-        return NULL;
+        goto err;
     }
 
     if (!chr->filename)
@@ -2820,7 +2820,12 @@ CharDriverState *qemu_chr_new_from_opts(QemuOpts *opts,
         chr->avail_connections = 1;
     }
     chr->label = g_strdup(qemu_opts_id(opts));
+    chr->opts = opts;
     return chr;
+
+err:
+    qemu_opts_del(opts);
+    return NULL;
 }
 
 CharDriverState *qemu_chr_new(const char *label, const char *filename, void (*init)(struct CharDriverState *s))
@@ -2846,7 +2851,6 @@ CharDriverState *qemu_chr_new(const char *label, const char *filename, void (*in
     if (chr && qemu_opt_get_bool(opts, "mux", 0)) {
         monitor_init(chr, MONITOR_USE_READLINE);
     }
-    qemu_opts_del(opts);
     return chr;
 }
 
@@ -2878,6 +2882,7 @@ void qemu_chr_delete(CharDriverState *chr)
         chr->chr_close(chr);
     g_free(chr->filename);
     g_free(chr->label);
+    qemu_opts_del(chr->opts);
     g_free(chr);
 }
 
diff --git a/qemu-char.h b/qemu-char.h
index d7eed34..f984071 100644
--- a/qemu-char.h
+++ b/qemu-char.h
@@ -75,6 +75,7 @@ struct CharDriverState {
     char *filename;
     int opened;
     int avail_connections;
+    QemuOpts *opts;
     QTAILQ_ENTRY(CharDriverState) next;
 };
 
-- 
1.7.1