X-Git-Url: http://review.tizen.org/git/?a=blobdiff_plain;f=cmds-receive.c;h=68123a31cc5cf5afe2eed69f5fad956c2ffb6253;hb=f0a376df4733dc6f0f0cdc529f4e7df64806f3f6;hp=06e61773612dffbfbcc1fb97b342cf93786b1e5c;hpb=30c7b11f7f030756d97711cef86c9891efc1d3ee;p=platform%2Fupstream%2Fbtrfs-progs.git

diff --git a/cmds-receive.c b/cmds-receive.c
index 06e6177..68123a3 100644
--- a/cmds-receive.c
+++ b/cmds-receive.c
@@ -783,7 +783,24 @@ static int process_clone(const char *path, u64 offset, u64 len,
 						r->subvol_parent_name);
 			}
 		}*/
-		subvol_path = strdup(si->path);
+
+		/* strip the subvolume that we are receiving to from the start of subvol_path */
+		if (rctx->full_root_path) {
+			size_t root_len = strlen(rctx->full_root_path);
+			size_t sub_len = strlen(si->path);
+
+			if (sub_len > root_len &&
+			    strstr(si->path, rctx->full_root_path) == si->path &&
+			    si->path[root_len] == '/') {
+				subvol_path = strdup(si->path + root_len + 1);
+			} else {
+				error("clone: source subvol path %s unreachable from %s",
+					si->path, rctx->full_root_path);
+				goto out;
+			}
+		} else {
+			subvol_path = strdup(si->path);
+		}
 	}
 
 	ret = path_cat_out(full_clone_path, subvol_path, clone_path);
@@ -1074,7 +1091,7 @@ static int do_receive(struct btrfs_receive *rctx, const char *tomnt,
 	char *dest_dir_full_path;
 	char root_subvol_path[PATH_MAX];
 	int end = 0;
-	int count;
+	int iterations = 0;
 
 	dest_dir_full_path = realpath(tomnt, NULL);
 	if (!dest_dir_full_path) {
@@ -1169,7 +1186,6 @@ static int do_receive(struct btrfs_receive *rctx, const char *tomnt,
 	if (ret < 0)
 		goto out;
 
-	count = 0;
 	while (!end) {
 		if (rctx->cached_capabilities_len) {
 			if (g_verbose >= 3)
@@ -1183,22 +1199,28 @@ static int do_receive(struct btrfs_receive *rctx, const char *tomnt,
 							 rctx,
 							 rctx->honor_end_cmd,
 							 max_errors);
-		if (ret < 0)
-			goto out;
-		/* Empty stream is invalid */
-		if (ret && count == 0) {
-			error("empty stream is not considered valid");
-			ret = -EINVAL;
-			goto out;
+		if (ret < 0) {
+			if (ret != -ENODATA)
+				goto out;
+
+			/* Empty stream is invalid */
+			if (iterations == 0) {
+				error("empty stream is not considered valid");
+				ret = -EINVAL;
+				goto out;
+			}
+
+			ret = 1;
 		}
-		count++;
-		if (ret)
+		if (ret > 0)
 			end = 1;
 
 		close_inode_for_write(rctx);
 		ret = finish_subvol(rctx);
 		if (ret < 0)
 			goto out;
+
+		iterations++;
 	}
 	ret = 0;
 
@@ -1255,7 +1277,7 @@ int cmd_receive(int argc, char **argv)
 			{ NULL, 0, NULL, 0 }
 		};
 
-		c = getopt_long(argc, argv, "Cevf:m:", long_opts, NULL);
+		c = getopt_long(argc, argv, "Cevf:m:E:", long_opts, NULL);
 		if (c < 0)
 			break;
 
@@ -1308,7 +1330,7 @@ int cmd_receive(int argc, char **argv)
 	if (fromfile[0]) {
 		receive_fd = open(fromfile, O_RDONLY | O_NOATIME);
 		if (receive_fd < 0) {
-			error("cannot open %s: %s", fromfile, strerror(errno));
+			error("cannot open %s: %m", fromfile);
 			goto out;
 		}
 	}