btrfs-progs: print-tree: show the compression method string

Signed-off-by: Wang Xiaoguang <wangxg.fnst@cn.fujitsu.com>
[ changed the format of unknown value ]
Signed-off-by: David Sterba <dsterba@suse.com>

diff --git a/print-tree.c b/print-tree.c
index 6704ff6..d0f37a5 100644 (file)
--- a/print-tree.c
+++ b/print-tree.c
@@ -285,19 +285,40 @@ static void print_uuids(struct extent_buffer *eb)
        printf("fs uuid %s\nchunk uuid %s\n", fs_uuid, chunk_uuid);
 }
 
+static void compress_type_to_str(u8 compress_type, char *ret)
+{
+       switch (compress_type) {
+       case BTRFS_COMPRESS_NONE:
+               strcpy(ret, "none");
+               break;
+       case BTRFS_COMPRESS_ZLIB:
+               strcpy(ret, "zlib");
+               break;
+       case BTRFS_COMPRESS_LZO:
+               strcpy(ret, "lzo");
+               break;
+       default:
+               sprintf(ret, "UNKNOWN.%d", compress_type);
+       }
+}
+
 static void print_file_extent_item(struct extent_buffer *eb,
                                   struct btrfs_item *item,
                                   int slot,
                                   struct btrfs_file_extent_item *fi)
 {
        int extent_type = btrfs_file_extent_type(eb, fi);
+       char compress_str[16];
+
+       compress_type_to_str(btrfs_file_extent_compression(eb, fi),
+                            compress_str);
 
        if (extent_type == BTRFS_FILE_EXTENT_INLINE) {
                printf("\t\tinline extent data size %u "
-                      "ram %u compress %d\n",
+                      "ram %u compress(%s)\n",
                  btrfs_file_extent_inline_item_len(eb, item),
                  btrfs_file_extent_inline_len(eb, slot, fi),
-                 btrfs_file_extent_compression(eb, fi));
+                 compress_str);
                return;
        }
        if (extent_type == BTRFS_FILE_EXTENT_PREALLOC) {
@@ -316,8 +337,7 @@ static void print_file_extent_item(struct extent_buffer *eb,
                (unsigned long long)btrfs_file_extent_offset(eb, fi),
                (unsigned long long)btrfs_file_extent_num_bytes(eb, fi),
                (unsigned long long)btrfs_file_extent_ram_bytes(eb, fi));
-       printf("\t\textent compression %d\n",
-              btrfs_file_extent_compression(eb, fi));
+       printf("\t\textent compression(%s)\n", compress_str);
 }
 
 /* Caller should ensure sizeof(*ret) >= 16("DATA|TREE_BLOCK") */