[Qemu-devel] [PULL 1/8] 9pfs: drop unused fmt strings in the proxy backend

[Greg Kurz]

The v9fs_request() function doesn't use its fmt argument: it passes literal
format strings to proxy_marshal() for all commands.

This patch simply drops the unused fmt argument and updates all callers
accordingly.

Signed-off-by: Greg Kurz <address@hidden>
Reviewed-by: Cédric Le Goater <address@hidden>
---
 hw/9pfs/9p-proxy.c | 67 ++++++++++++++++++++++++------------------------------
 1 file changed, 30 insertions(+), 37 deletions(-)

diff --git a/hw/9pfs/9p-proxy.c b/hw/9pfs/9p-proxy.c
index f265501eac1d..52bbf4f1b37c 100644
--- a/hw/9pfs/9p-proxy.c
+++ b/hw/9pfs/9p-proxy.c
@@ -294,8 +294,7 @@ static int v9fs_receive_status(V9fsProxy *proxy,
  * This request read by proxy helper process
  * returns 0 on success and -errno on error
  */
-static int v9fs_request(V9fsProxy *proxy, int type,
-                        void *response, const char *fmt, ...)
+static int v9fs_request(V9fsProxy *proxy, int type, void *response, ...)
 {
     dev_t rdev;
     va_list ap;
@@ -317,7 +316,7 @@ static int v9fs_request(V9fsProxy *proxy, int type,
     }
     iovec = &proxy->out_iovec;
     reply = &proxy->in_iovec;
-    va_start(ap, fmt);
+    va_start(ap, response);
     switch (type) {
     case T_OPEN:
         path = va_arg(ap, V9fsString *);
@@ -605,7 +604,7 @@ close_error:
 static int proxy_lstat(FsContext *fs_ctx, V9fsPath *fs_path, struct stat 
*stbuf)
 {
     int retval;
-    retval = v9fs_request(fs_ctx->private, T_LSTAT, stbuf, "s", fs_path);
+    retval = v9fs_request(fs_ctx->private, T_LSTAT, stbuf, fs_path);
     if (retval < 0) {
         errno = -retval;
         return -1;
@@ -617,8 +616,7 @@ static ssize_t proxy_readlink(FsContext *fs_ctx, V9fsPath 
*fs_path,
                               char *buf, size_t bufsz)
 {
     int retval;
-    retval = v9fs_request(fs_ctx->private, T_READLINK, buf, "sd",
-                          fs_path, bufsz);
+    retval = v9fs_request(fs_ctx->private, T_READLINK, buf, fs_path, bufsz);
     if (retval < 0) {
         errno = -retval;
         return -1;
@@ -639,7 +637,7 @@ static int proxy_closedir(FsContext *ctx, V9fsFidOpenState 
*fs)
 static int proxy_open(FsContext *ctx, V9fsPath *fs_path,
                       int flags, V9fsFidOpenState *fs)
 {
-    fs->fd = v9fs_request(ctx->private, T_OPEN, NULL, "sd", fs_path, flags);
+    fs->fd = v9fs_request(ctx->private, T_OPEN, NULL, fs_path, flags);
     if (fs->fd < 0) {
         errno = -fs->fd;
         fs->fd = -1;
@@ -653,7 +651,7 @@ static int proxy_opendir(FsContext *ctx,
     int serrno, fd;
 
     fs->dir.stream = NULL;
-    fd = v9fs_request(ctx->private, T_OPEN, NULL, "sd", fs_path, O_DIRECTORY);
+    fd = v9fs_request(ctx->private, T_OPEN, NULL, fs_path, O_DIRECTORY);
     if (fd < 0) {
         errno = -fd;
         return -1;
@@ -735,8 +733,8 @@ static ssize_t proxy_pwritev(FsContext *ctx, 
V9fsFidOpenState *fs,
 static int proxy_chmod(FsContext *fs_ctx, V9fsPath *fs_path, FsCred *credp)
 {
     int retval;
-    retval = v9fs_request(fs_ctx->private, T_CHMOD, NULL, "sd",
-                          fs_path, credp->fc_mode);
+    retval = v9fs_request(fs_ctx->private, T_CHMOD, NULL, fs_path,
+                          credp->fc_mode);
     if (retval < 0) {
         errno = -retval;
     }
@@ -752,8 +750,8 @@ static int proxy_mknod(FsContext *fs_ctx, V9fsPath 
*dir_path,
     v9fs_string_init(&fullname);
     v9fs_string_sprintf(&fullname, "%s/%s", dir_path->data, name);
 
-    retval = v9fs_request(fs_ctx->private, T_MKNOD, NULL, "sdqdd",
-                          &fullname, credp->fc_mode, credp->fc_rdev,
+    retval = v9fs_request(fs_ctx->private, T_MKNOD, NULL, &fullname,
+                          credp->fc_mode, credp->fc_rdev,
                           credp->fc_uid, credp->fc_gid);
     v9fs_string_free(&fullname);
     if (retval < 0) {
@@ -772,7 +770,7 @@ static int proxy_mkdir(FsContext *fs_ctx, V9fsPath 
*dir_path,
     v9fs_string_init(&fullname);
     v9fs_string_sprintf(&fullname, "%s/%s", dir_path->data, name);
 
-    retval = v9fs_request(fs_ctx->private, T_MKDIR, NULL, "sddd", &fullname,
+    retval = v9fs_request(fs_ctx->private, T_MKDIR, NULL, &fullname,
                           credp->fc_mode, credp->fc_uid, credp->fc_gid);
     v9fs_string_free(&fullname);
     if (retval < 0) {
@@ -804,9 +802,8 @@ static int proxy_open2(FsContext *fs_ctx, V9fsPath 
*dir_path, const char *name,
     v9fs_string_init(&fullname);
     v9fs_string_sprintf(&fullname, "%s/%s", dir_path->data, name);
 
-    fs->fd = v9fs_request(fs_ctx->private, T_CREATE, NULL, "sdddd",
-                          &fullname, flags, credp->fc_mode,
-                          credp->fc_uid, credp->fc_gid);
+    fs->fd = v9fs_request(fs_ctx->private, T_CREATE, NULL, &fullname, flags,
+                          credp->fc_mode, credp->fc_uid, credp->fc_gid);
     v9fs_string_free(&fullname);
     if (fs->fd < 0) {
         errno = -fs->fd;
@@ -827,8 +824,8 @@ static int proxy_symlink(FsContext *fs_ctx, const char 
*oldpath,
     v9fs_string_sprintf(&fullname, "%s/%s", dir_path->data, name);
     v9fs_string_sprintf(&target, "%s", oldpath);
 
-    retval = v9fs_request(fs_ctx->private, T_SYMLINK, NULL, "ssdd",
-                          &target, &fullname, credp->fc_uid, credp->fc_gid);
+    retval = v9fs_request(fs_ctx->private, T_SYMLINK, NULL, &target, &fullname,
+                          credp->fc_uid, credp->fc_gid);
     v9fs_string_free(&fullname);
     v9fs_string_free(&target);
     if (retval < 0) {
@@ -847,7 +844,7 @@ static int proxy_link(FsContext *ctx, V9fsPath *oldpath,
     v9fs_string_init(&newpath);
     v9fs_string_sprintf(&newpath, "%s/%s", dirpath->data, name);
 
-    retval = v9fs_request(ctx->private, T_LINK, NULL, "ss", oldpath, &newpath);
+    retval = v9fs_request(ctx->private, T_LINK, NULL, oldpath, &newpath);
     v9fs_string_free(&newpath);
     if (retval < 0) {
         errno = -retval;
@@ -860,7 +857,7 @@ static int proxy_truncate(FsContext *ctx, V9fsPath 
*fs_path, off_t size)
 {
     int retval;
 
-    retval = v9fs_request(ctx->private, T_TRUNCATE, NULL, "sq", fs_path, size);
+    retval = v9fs_request(ctx->private, T_TRUNCATE, NULL, fs_path, size);
     if (retval < 0) {
         errno = -retval;
         return -1;
@@ -879,8 +876,7 @@ static int proxy_rename(FsContext *ctx, const char *oldpath,
 
     v9fs_string_sprintf(&oldname, "%s", oldpath);
     v9fs_string_sprintf(&newname, "%s", newpath);
-    retval = v9fs_request(ctx->private, T_RENAME, NULL, "ss",
-                          &oldname, &newname);
+    retval = v9fs_request(ctx->private, T_RENAME, NULL, &oldname, &newname);
     v9fs_string_free(&oldname);
     v9fs_string_free(&newname);
     if (retval < 0) {
@@ -892,8 +888,8 @@ static int proxy_rename(FsContext *ctx, const char *oldpath,
 static int proxy_chown(FsContext *fs_ctx, V9fsPath *fs_path, FsCred *credp)
 {
     int retval;
-    retval = v9fs_request(fs_ctx->private, T_CHOWN, NULL, "sdd",
-                          fs_path, credp->fc_uid, credp->fc_gid);
+    retval = v9fs_request(fs_ctx->private, T_CHOWN, NULL, fs_path,
+                          credp->fc_uid, credp->fc_gid);
     if (retval < 0) {
         errno = -retval;
     }
@@ -904,8 +900,7 @@ static int proxy_utimensat(FsContext *s, V9fsPath *fs_path,
                            const struct timespec *buf)
 {
     int retval;
-    retval = v9fs_request(s->private, T_UTIME, NULL, "sqqqq",
-                          fs_path,
+    retval = v9fs_request(s->private, T_UTIME, NULL, fs_path,
                           buf[0].tv_sec, buf[0].tv_nsec,
                           buf[1].tv_sec, buf[1].tv_nsec);
     if (retval < 0) {
@@ -920,7 +915,7 @@ static int proxy_remove(FsContext *ctx, const char *path)
     V9fsString name;
     v9fs_string_init(&name);
     v9fs_string_sprintf(&name, "%s", path);
-    retval = v9fs_request(ctx->private, T_REMOVE, NULL, "s", &name);
+    retval = v9fs_request(ctx->private, T_REMOVE, NULL, &name);
     v9fs_string_free(&name);
     if (retval < 0) {
         errno = -retval;
@@ -949,7 +944,7 @@ static int proxy_fsync(FsContext *ctx, int fid_type,
 static int proxy_statfs(FsContext *s, V9fsPath *fs_path, struct statfs *stbuf)
 {
     int retval;
-    retval = v9fs_request(s->private, T_STATFS, stbuf, "s", fs_path);
+    retval = v9fs_request(s->private, T_STATFS, stbuf, fs_path);
     if (retval < 0) {
         errno = -retval;
         return -1;
@@ -965,8 +960,8 @@ static ssize_t proxy_lgetxattr(FsContext *ctx, V9fsPath 
*fs_path,
 
     v9fs_string_init(&xname);
     v9fs_string_sprintf(&xname, "%s", name);
-    retval = v9fs_request(ctx->private, T_LGETXATTR, value, "dss", size,
-                          fs_path, &xname);
+    retval = v9fs_request(ctx->private, T_LGETXATTR, value, size, fs_path,
+                          &xname);
     v9fs_string_free(&xname);
     if (retval < 0) {
         errno = -retval;
@@ -978,8 +973,7 @@ static ssize_t proxy_llistxattr(FsContext *ctx, V9fsPath 
*fs_path,
                                 void *value, size_t size)
 {
     int retval;
-    retval = v9fs_request(ctx->private, T_LLISTXATTR, value, "ds", size,
-                        fs_path);
+    retval = v9fs_request(ctx->private, T_LLISTXATTR, value, size, fs_path);
     if (retval < 0) {
         errno = -retval;
     }
@@ -1000,8 +994,8 @@ static int proxy_lsetxattr(FsContext *ctx, V9fsPath 
*fs_path, const char *name,
     xvalue.data = g_malloc(size);
     memcpy(xvalue.data, value, size);
 
-    retval = v9fs_request(ctx->private, T_LSETXATTR, value, "sssdd",
-                          fs_path, &xname, &xvalue, size, flags);
+    retval = v9fs_request(ctx->private, T_LSETXATTR, value, fs_path, &xname,
+                          &xvalue, size, flags);
     v9fs_string_free(&xname);
     v9fs_string_free(&xvalue);
     if (retval < 0) {
@@ -1018,8 +1012,7 @@ static int proxy_lremovexattr(FsContext *ctx, V9fsPath 
*fs_path,
 
     v9fs_string_init(&xname);
     v9fs_string_sprintf(&xname, "%s", name);
-    retval = v9fs_request(ctx->private, T_LREMOVEXATTR, NULL, "ss",
-                          fs_path, &xname);
+    retval = v9fs_request(ctx->private, T_LREMOVEXATTR, NULL, fs_path, &xname);
     v9fs_string_free(&xname);
     if (retval < 0) {
         errno = -retval;
@@ -1086,7 +1079,7 @@ static int proxy_ioc_getversion(FsContext *fs_ctx, 
V9fsPath *path,
         errno = ENOTTY;
         return -1;
     }
-    err = v9fs_request(fs_ctx->private, T_GETVERSION, st_gen, "s", path);
+    err = v9fs_request(fs_ctx->private, T_GETVERSION, st_gen, path);
     if (err < 0) {
         errno = -err;
         err = -1;
-- 
2.5.5