btrfs-progs: receive: use static buffer for root_subvol_path

Signed-off-by: David Sterba <dsterba@suse.cz>

diff --git a/cmds-receive.c b/cmds-receive.c
index 4148be2..eaccc8c 100644 (file)
--- a/cmds-receive.c
+++ b/cmds-receive.c
@@ -1038,7 +1038,7 @@ static int do_receive(struct btrfs_receive *r, const char *tomnt,
        u64 subvol_id;
        int ret;
        char *dest_dir_full_path;
-       char *root_subvol_path;
+       char root_subvol_path[PATH_MAX];
        int end = 0;
 
        dest_dir_full_path = realpath(tomnt, NULL);
@@ -1096,14 +1096,7 @@ static int do_receive(struct btrfs_receive *r, const char *tomnt,
                goto out;
        }
 
-       root_subvol_path = malloc(PATH_MAX);
-       if (!root_subvol_path) {
-               ret = -ENOMEM;
-               fprintf(stderr, "ERROR: couldn't allocate buffer for the root "
-                       "subvol path\n");
-               goto out;
-       }
-
+       root_subvol_path[0] = 0;
        ret = btrfs_subvolid_resolve(r->mnt_fd, root_subvol_path,
                                     PATH_MAX, subvol_id);
        if (ret) {
@@ -1117,8 +1110,6 @@ static int do_receive(struct btrfs_receive *r, const char *tomnt,
         */
        if (strlen(root_subvol_path))
                r->full_root_path = root_subvol_path;
-       else
-               free(root_subvol_path);
 
        if (r->dest_dir_chroot) {
                if (chroot(dest_dir_full_path)) {
@@ -1204,10 +1195,7 @@ out:
                close(r->dest_dir_fd);
                r->dest_dir_fd = -1;
        }
-       if (r->full_root_path) {
-               free(r->full_root_path);
-               r->full_root_path = NULL;
-       }
+
        return ret;
 }