btrfs-progs: Allow btrfs-debug-tree to print human readable qgroup status flag.

Now btrfs-debug-tree can print qgroup status flag as ON|INCONSISTENT
instead of 0x5.

BTW, this patch helped us to find a bug that INCONSISTENT flag is never
cleared in kernel.

Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
[renamed to qgroup_flags_to_str]
Signed-off-by: David Sterba <dsterba@suse.cz>

diff --git a/print-tree.c b/print-tree.c
index 30adc1a..b471a96 100644 (file)
--- a/print-tree.c
+++ b/print-tree.c
@@ -203,6 +203,20 @@ static void bg_flags_to_str(u64 flags, char *ret)
        }
 }
 
+/* Caller should ensure sizeof(*ret)>= 26 "OFF|SCANNING|INCONSISTENT" */
+static void qgroup_flags_to_str(u64 flags, char *ret)
+{
+       if (flags & BTRFS_QGROUP_STATUS_FLAG_ON)
+               strcpy(ret, "ON");
+       else
+               strcpy(ret, "OFF");
+
+       if (flags & BTRFS_QGROUP_STATUS_FLAG_RESCAN)
+               strcat(ret, "|SCANNING");
+       if (flags & BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT)
+               strcat(ret, "|INCONSISTENT");
+}
+
 void print_chunk(struct extent_buffer *eb, struct btrfs_chunk *chunk)
 {
        int num_stripes = btrfs_chunk_num_stripes(eb, chunk);
@@ -801,7 +815,7 @@ void btrfs_print_leaf(struct btrfs_root *root, struct extent_buffer *l)
        u32 nr = btrfs_header_nritems(l);
        u64 objectid;
        u32 type;
-       char bg_flags_str[32];
+       char flags_str[32];
 
        printf("leaf %llu items %d free space %d generation %llu owner %llu\n",
                (unsigned long long)btrfs_header_bytenr(l), nr,
@@ -920,13 +934,13 @@ void btrfs_print_leaf(struct btrfs_root *root, struct extent_buffer *l)
                                            struct btrfs_block_group_item);
                        read_extent_buffer(l, &bg_item, (unsigned long)bi,
                                           sizeof(bg_item));
-                       memset(bg_flags_str, 0, sizeof(bg_flags_str));
+                       memset(flags_str, 0, sizeof(flags_str));
                        bg_flags_to_str(btrfs_block_group_flags(&bg_item),
-                                       bg_flags_str);
+                                       flags_str);
                        printf("\t\tblock group used %llu chunk_objectid %llu flags %s\n",
                               (unsigned long long)btrfs_block_group_used(&bg_item),
                               (unsigned long long)btrfs_block_group_chunk_objectid(&bg_item),
-                              bg_flags_str);
+                              flags_str);
                        break;
                case BTRFS_CHUNK_ITEM_KEY:
                        print_chunk(l, btrfs_item_ptr(l, i, struct btrfs_chunk));
@@ -953,14 +967,16 @@ void btrfs_print_leaf(struct btrfs_root *root, struct extent_buffer *l)
                case BTRFS_QGROUP_STATUS_KEY:
                        qg_status = btrfs_item_ptr(l, i,
                                        struct btrfs_qgroup_status_item);
-                       printf("\t\tversion %llu generation %llu flags %#llx "
+                       memset(flags_str, 0, sizeof(flags_str));
+                       qgroup_flags_to_str(btrfs_qgroup_status_flags(l, qg_status),
+                                       flags_str);
+                       printf("\t\tversion %llu generation %llu flags %s "
                                "scan %lld\n",
                                (unsigned long long)
                                btrfs_qgroup_status_version(l, qg_status),
                                (unsigned long long)
                                btrfs_qgroup_status_generation(l, qg_status),
-                               (unsigned long long)
-                               btrfs_qgroup_status_flags(l, qg_status),
+                               flags_str,
                                (unsigned long long)
                                btrfs_qgroup_status_scan(l, qg_status));
                        break;