diff mbox series

[3/8] qemu-nbd: move srcpath into struct NbdClientOpts

Message ID 20230906093210.339585-4-den@openvz.org
State New
Headers show
Series qemu-nbd: Restore "qemu-nbd -v --fork" output | expand

Commit Message

Denis V. Lunev Sept. 6, 2023, 9:32 a.m. UTC 
We pass other parameters into nbd_client_thread() in this way. This patch
makes the code more consistent.

Signed-off-by: Denis V. Lunev <den@openvz.org>
CC: Eric Blake <eblake@redhat.com>
CC: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>
---
 qemu-nbd.c | 17 +++++++++--------
 1 file changed, 9 insertions(+), 8 deletions(-)

Comments

Eric Blake Sept. 7, 2023, 9:43 p.m. UTC | #1 
On Wed, Sep 06, 2023 at 11:32:05AM +0200, Denis V. Lunev wrote:
> We pass other parameters into nbd_client_thread() in this way. This patch
> makes the code more consistent.
> 
> Signed-off-by: Denis V. Lunev <den@openvz.org>
> CC: Eric Blake <eblake@redhat.com>
> CC: Vladimir Sementsov-Ogievskiy <vsementsov@yandex-team.ru>
> ---
>  qemu-nbd.c | 17 +++++++++--------
>  1 file changed, 9 insertions(+), 8 deletions(-)
> 

> @@ -1059,19 +1060,19 @@ int main(int argc, char **argv)
>      bdrv_init();
>      atexit(qemu_nbd_shutdown);
>  
> -    srcpath = argv[optind];
> +    opts.srcpath = argv[optind];
>      if (imageOpts) {
> -        QemuOpts *opts;
> +        QemuOpts *o;
>          if (fmt) {
>              error_report("--image-opts and -f are mutually exclusive");
>              exit(EXIT_FAILURE);
>          }
> -        opts = qemu_opts_parse_noisily(&file_opts, srcpath, true);
> -        if (!opts) {
> +        o = qemu_opts_parse_noisily(&file_opts, opts.srcpath, true);
> +        if (!o) {

Hmm - this would have been flagged by -Wshadow, and there are other
series working to clean up tree-wide issues that shadowing can cause.
Looking again, the shadowing was previously introduced before this
series, but only when HAVE_NBD_DEVICE was defined; then patch 2/8 made
the shadowing unconditional.  Reworking the series to clean up the
shadowing earlier in 2/8 is just churn, so I don't mind that it took
us to this point to notice it; however, I'm inclined to add a note to
the commit message that it is a (happy) side-effect.

Reviewed-by: Eric Blake <eblake@redhat.com>
diff mbox series

Patch

diff --git a/qemu-nbd.c b/qemu-nbd.c
index ebfae4d0b6..de6c2be590 100644
--- a/qemu-nbd.c
+++ b/qemu-nbd.c
@@ -73,7 +73,6 @@ 
 
 #define MBR_SIZE 512
 
-static char *srcpath;
 static SocketAddress *saddr;
 static int persistent = 0;
 static enum { RUNNING, TERMINATE, TERMINATED } state;
@@ -255,6 +254,7 @@  static int qemu_nbd_client_list(SocketAddress *saddr, QCryptoTLSCreds *tls,
 
 struct NbdClientOpts {
     char *device;
+    char *srcpath;
     bool fork_process;
     bool verbose;
 };
@@ -320,7 +320,7 @@  static void *nbd_client_thread(void *arg)
 
     if (opts->verbose && !opts->fork_process) {
         fprintf(stderr, "NBD device %s is now connected to %s\n",
-                opts->device, srcpath);
+                opts->device, opts->srcpath);
     } else {
         /* Close stderr so that the qemu-nbd process exits.  */
         if (dup2(STDOUT_FILENO, STDERR_FILENO) < 0) {
@@ -590,6 +590,7 @@  int main(int argc, char **argv)
         .fork_process = false,
         .verbose = false,
         .device = NULL,
+        .srcpath = NULL,
     };
 
 #ifdef CONFIG_POSIX
@@ -1059,19 +1060,19 @@  int main(int argc, char **argv)
     bdrv_init();
     atexit(qemu_nbd_shutdown);
 
-    srcpath = argv[optind];
+    opts.srcpath = argv[optind];
     if (imageOpts) {
-        QemuOpts *opts;
+        QemuOpts *o;
         if (fmt) {
             error_report("--image-opts and -f are mutually exclusive");
             exit(EXIT_FAILURE);
         }
-        opts = qemu_opts_parse_noisily(&file_opts, srcpath, true);
-        if (!opts) {
+        o = qemu_opts_parse_noisily(&file_opts, opts.srcpath, true);
+        if (!o) {
             qemu_opts_reset(&file_opts);
             exit(EXIT_FAILURE);
         }
-        options = qemu_opts_to_qdict(opts, NULL);
+        options = qemu_opts_to_qdict(o, NULL);
         qemu_opts_reset(&file_opts);
         blk = blk_new_open(NULL, NULL, options, flags, &local_err);
     } else {
@@ -1079,7 +1080,7 @@  int main(int argc, char **argv)
             options = qdict_new();
             qdict_put_str(options, "driver", fmt);
         }
-        blk = blk_new_open(srcpath, NULL, options, flags, &local_err);
+        blk = blk_new_open(opts.srcpath, NULL, options, flags, &local_err);
     }
 
     if (!blk) {