btrfs-progs: check: introduce function to query tree block level
[platform/upstream/btrfs-progs.git] / print-tree.c
index 761448d..9f9e11e 100644 (file)
@@ -24,6 +24,7 @@
 #include "ctree.h"
 #include "disk-io.h"
 #include "print-tree.h"
+#include "utils.h"
 
 
 static void print_dir_item_type(struct extent_buffer *eb,
@@ -159,65 +160,165 @@ static int print_inode_ref_item(struct extent_buffer *eb, struct btrfs_item *ite
        return 0;
 }
 
-static void print_chunk(struct extent_buffer *eb, struct btrfs_chunk *chunk)
+/* Caller should ensure sizeof(*ret)>=21 "DATA|METADATA|RAID10" */
+static void bg_flags_to_str(u64 flags, char *ret)
+{
+       int empty = 1;
+
+       if (flags & BTRFS_BLOCK_GROUP_DATA) {
+               empty = 0;
+               strcpy(ret, "DATA");
+       }
+       if (flags & BTRFS_BLOCK_GROUP_METADATA) {
+               if (!empty)
+                       strcat(ret, "|");
+               strcat(ret, "METADATA");
+       }
+       if (flags & BTRFS_BLOCK_GROUP_SYSTEM) {
+               if (!empty)
+                       strcat(ret, "|");
+               strcat(ret, "SYSTEM");
+       }
+       switch (flags & BTRFS_BLOCK_GROUP_PROFILE_MASK) {
+       case BTRFS_BLOCK_GROUP_RAID0:
+               strcat(ret, "|RAID0");
+               break;
+       case BTRFS_BLOCK_GROUP_RAID1:
+               strcat(ret, "|RAID1");
+               break;
+       case BTRFS_BLOCK_GROUP_DUP:
+               strcat(ret, "|DUP");
+               break;
+       case BTRFS_BLOCK_GROUP_RAID10:
+               strcat(ret, "|RAID10");
+               break;
+       case BTRFS_BLOCK_GROUP_RAID5:
+               strcat(ret, "|RAID5");
+               break;
+       case BTRFS_BLOCK_GROUP_RAID6:
+               strcat(ret, "|RAID6");
+               break;
+       default:
+               break;
+       }
+}
+
+/* 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);
        int i;
-       printf("\t\tchunk length %llu owner %llu type %llu num_stripes %d\n",
+       char chunk_flags_str[32] = {0};
+
+       bg_flags_to_str(btrfs_chunk_type(eb, chunk), chunk_flags_str);
+       printf("\t\tchunk length %llu owner %llu stripe_len %llu\n",
               (unsigned long long)btrfs_chunk_length(eb, chunk),
               (unsigned long long)btrfs_chunk_owner(eb, chunk),
-              (unsigned long long)btrfs_chunk_type(eb, chunk),
-              num_stripes);
+              (unsigned long long)btrfs_chunk_stripe_len(eb, chunk));
+       printf("\t\ttype %s num_stripes %d\n",
+              chunk_flags_str, num_stripes);
        for (i = 0 ; i < num_stripes ; i++) {
+               unsigned char dev_uuid[BTRFS_UUID_SIZE];
+               char str_dev_uuid[BTRFS_UUID_UNPARSED_SIZE];
+
+               read_extent_buffer(eb, dev_uuid,
+                       (unsigned long)btrfs_stripe_dev_uuid_nr(chunk, i),
+                       BTRFS_UUID_SIZE);
+               uuid_unparse(dev_uuid, str_dev_uuid);
                printf("\t\t\tstripe %d devid %llu offset %llu\n", i,
                      (unsigned long long)btrfs_stripe_devid_nr(eb, chunk, i),
                      (unsigned long long)btrfs_stripe_offset_nr(eb, chunk, i));
+               printf("\t\t\tdev uuid: %s\n", str_dev_uuid);
        }
 }
 
 static void print_dev_item(struct extent_buffer *eb,
                           struct btrfs_dev_item *dev_item)
 {
+       char disk_uuid_c[BTRFS_UUID_UNPARSED_SIZE];
+       u8 disk_uuid[BTRFS_UUID_SIZE];
+
+       read_extent_buffer(eb, disk_uuid,
+                          (unsigned long)btrfs_device_uuid(dev_item),
+                          BTRFS_UUID_SIZE);
+       uuid_unparse(disk_uuid, disk_uuid_c);
        printf("\t\tdev item devid %llu "
-              "total_bytes %llu bytes used %Lu\n",
+              "total_bytes %llu bytes used %Lu\n"
+              "\t\tdev uuid %s\n",
               (unsigned long long)btrfs_device_id(eb, dev_item),
               (unsigned long long)btrfs_device_total_bytes(eb, dev_item),
-              (unsigned long long)btrfs_device_bytes_used(eb, dev_item));
+              (unsigned long long)btrfs_device_bytes_used(eb, dev_item),
+              disk_uuid_c);
 }
 
 static void print_uuids(struct extent_buffer *eb)
 {
-       char fs_uuid[37];
-       char chunk_uuid[37];
+       char fs_uuid[BTRFS_UUID_UNPARSED_SIZE];
+       char chunk_uuid[BTRFS_UUID_UNPARSED_SIZE];
        u8 disk_uuid[BTRFS_UUID_SIZE];
 
-       read_extent_buffer(eb, disk_uuid, (unsigned long)btrfs_header_fsid(eb),
+       read_extent_buffer(eb, disk_uuid, btrfs_header_fsid(),
                           BTRFS_FSID_SIZE);
 
-       fs_uuid[36] = '\0';
+       fs_uuid[BTRFS_UUID_UNPARSED_SIZE - 1] = '\0';
        uuid_unparse(disk_uuid, fs_uuid);
 
        read_extent_buffer(eb, disk_uuid,
-                          (unsigned long)btrfs_header_chunk_tree_uuid(eb),
+                          btrfs_header_chunk_tree_uuid(eb),
                           BTRFS_UUID_SIZE);
 
-       chunk_uuid[36] = '\0';
+       chunk_uuid[BTRFS_UUID_UNPARSED_SIZE - 1] = '\0';
        uuid_unparse(disk_uuid, chunk_uuid);
        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, fi),
-                 btrfs_file_extent_compression(eb, fi));
+                 btrfs_file_extent_inline_len(eb, slot, fi),
+                 compress_str);
                return;
        }
        if (extent_type == BTRFS_FILE_EXTENT_PREALLOC) {
@@ -236,11 +337,32 @@ 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);
 }
 
-static void print_extent_item(struct extent_buffer *eb, int slot, int metadata)
+/* Caller should ensure sizeof(*ret) >= 16("DATA|TREE_BLOCK") */
+static void extent_flags_to_str(u64 flags, char *ret)
+{
+       int empty = 1;
+
+       if (flags & BTRFS_EXTENT_FLAG_DATA) {
+               empty = 0;
+               strcpy(ret, "DATA");
+       }
+       if (flags & BTRFS_EXTENT_FLAG_TREE_BLOCK) {
+               if (!empty) {
+                       empty = 0;
+                       strcat(ret, "|");
+               }
+               strcat(ret, "TREE_BLOCK");
+       }
+       if (flags & BTRFS_BLOCK_FLAG_FULL_BACKREF) {
+               strcat(ret, "|");
+               strcat(ret, "FULL_BACKREF");
+       }
+}
+
+void print_extent_item(struct extent_buffer *eb, int slot, int metadata)
 {
        struct btrfs_extent_item *ei;
        struct btrfs_extent_inline_ref *iref;
@@ -253,6 +375,7 @@ static void print_extent_item(struct extent_buffer *eb, int slot, int metadata)
        u32 item_size = btrfs_item_size_nr(eb, slot);
        u64 flags;
        u64 offset;
+       char flags_str[32] = {0};
 
        if (item_size < sizeof(*ei)) {
 #ifdef BTRFS_COMPAT_EXTENT_TREE_V0
@@ -269,11 +392,12 @@ static void print_extent_item(struct extent_buffer *eb, int slot, int metadata)
 
        ei = btrfs_item_ptr(eb, slot, struct btrfs_extent_item);
        flags = btrfs_extent_flags(eb, ei);
+       extent_flags_to_str(flags, flags_str);
 
-       printf("\t\textent refs %llu gen %llu flags %llu\n",
+       printf("\t\textent refs %llu gen %llu flags %s\n",
               (unsigned long long)btrfs_extent_refs(eb, ei),
               (unsigned long long)btrfs_extent_generation(eb, ei),
-              (unsigned long long)flags);
+              flags_str);
 
        if (flags & BTRFS_EXTENT_FLAG_TREE_BLOCK && !metadata) {
                struct btrfs_tree_block_info *info;
@@ -377,7 +501,7 @@ static void print_root(struct extent_buffer *leaf, int slot)
        struct btrfs_root_item *ri;
        struct btrfs_root_item root_item;
        int len;
-       char uuid_str[128];
+       char uuid_str[BTRFS_UUID_UNPARSED_SIZE];
 
        ri = btrfs_item_ptr(leaf, slot, struct btrfs_root_item);
        len = btrfs_item_size_nr(leaf, slot);
@@ -385,12 +509,13 @@ static void print_root(struct extent_buffer *leaf, int slot)
        memset(&root_item, 0, sizeof(root_item));
        read_extent_buffer(leaf, &root_item, (unsigned long)ri, len);
 
-       printf("\t\troot data bytenr %llu level %d dirid %llu refs %u gen %llu\n",
+       printf("\t\troot data bytenr %llu level %d dirid %llu refs %u gen %llu lastsnap %llu\n",
                (unsigned long long)btrfs_root_bytenr(&root_item),
                btrfs_root_level(&root_item),
                (unsigned long long)btrfs_root_dirid(&root_item),
                btrfs_root_refs(&root_item),
-               (unsigned long long)btrfs_root_generation(&root_item));
+               (unsigned long long)btrfs_root_generation(&root_item),
+               (unsigned long long)btrfs_root_last_snapshot(&root_item));
 
        if (root_item.generation == root_item.generation_v2) {
                uuid_unparse(root_item.uuid, uuid_str);
@@ -514,6 +639,15 @@ static void print_key_type(u64 objectid, u8 type)
        case BTRFS_BLOCK_GROUP_ITEM_KEY:
                printf("BLOCK_GROUP_ITEM");
                break;
+       case BTRFS_FREE_SPACE_INFO_KEY:
+               printf("FREE_SPACE_INFO");
+               break;
+       case BTRFS_FREE_SPACE_EXTENT_KEY:
+               printf("FREE_SPACE_EXTENT");
+               break;
+       case BTRFS_FREE_SPACE_BITMAP_KEY:
+               printf("FREE_SPACE_BITMAP");
+               break;
        case BTRFS_CHUNK_ITEM_KEY:
                printf("CHUNK_ITEM");
                break;
@@ -527,31 +661,31 @@ static void print_key_type(u64 objectid, u8 type)
                printf("BALANCE_ITEM");
                break;
        case BTRFS_DEV_REPLACE_KEY:
-               printf("DEV_REPLACE_ITEM");
+               printf("DEV_REPLACE");
                break;
        case BTRFS_STRING_ITEM_KEY:
                printf("STRING_ITEM");
                break;
        case BTRFS_QGROUP_STATUS_KEY:
-               printf("BTRFS_STATUS_KEY");
+               printf("QGROUP_STATUS");
                break;
        case BTRFS_QGROUP_RELATION_KEY:
-               printf("BTRFS_QGROUP_RELATION_KEY");
+               printf("QGROUP_RELATION");
                break;
        case BTRFS_QGROUP_INFO_KEY:
-               printf("BTRFS_QGROUP_INFO_KEY");
+               printf("QGROUP_INFO");
                break;
        case BTRFS_QGROUP_LIMIT_KEY:
-               printf("BTRFS_QGROUP_LIMIT_KEY");
+               printf("QGROUP_LIMIT");
                break;
        case BTRFS_DEV_STATS_KEY:
-               printf("DEV_STATS_ITEM");
+               printf("DEV_STATS");
                break;
        case BTRFS_UUID_KEY_SUBVOL:
-               printf("BTRFS_UUID_KEY_SUBVOL");
+               printf("UUID_KEY_SUBVOL");
                break;
        case BTRFS_UUID_KEY_RECEIVED_SUBVOL:
-               printf("BTRFS_UUID_KEY_RECEIVED_SUBVOL");
+               printf("UUID_KEY_RECEIVED_SUBVOL");
                break;
        default:
                printf("UNKNOWN.%d", type);
@@ -565,8 +699,8 @@ static void print_objectid(u64 objectid, u8 type)
                printf("%llu", (unsigned long long)objectid); /* device id */
                return;
        case BTRFS_QGROUP_RELATION_KEY:
-               printf("%llu/%llu", objectid >> 48,
-                       objectid & ((1ll << 48) - 1));
+               printf("%llu/%llu", btrfs_qgroup_level(objectid),
+                      btrfs_qgroup_subvid(objectid));
                return;
        case BTRFS_UUID_KEY_SUBVOL:
        case BTRFS_UUID_KEY_RECEIVED_SUBVOL:
@@ -632,6 +766,9 @@ static void print_objectid(u64 objectid, u8 type)
        case BTRFS_UUID_TREE_OBJECTID:
                printf("UUID_TREE");
                break;
+       case BTRFS_FREE_SPACE_TREE_OBJECTID:
+               printf("FREE_SPACE_TREE");
+               break;
        case BTRFS_MULTIPLE_OBJECTIDS:
                printf("MULTIPLE");
                break;
@@ -663,8 +800,8 @@ void btrfs_print_key(struct btrfs_disk_key *disk_key)
        case BTRFS_QGROUP_RELATION_KEY:
        case BTRFS_QGROUP_INFO_KEY:
        case BTRFS_QGROUP_LIMIT_KEY:
-               printf(" %llu/%llu)", (unsigned long long)(offset >> 48),
-                       (unsigned long long)(offset & ((1ll << 48) - 1)));
+               printf(" %llu/%llu)", btrfs_qgroup_level(offset),
+                      btrfs_qgroup_subvid(offset));
                break;
        case BTRFS_UUID_KEY_SUBVOL:
        case BTRFS_UUID_KEY_RECEIVED_SUBVOL:
@@ -688,11 +825,11 @@ static void print_uuid_item(struct extent_buffer *l, unsigned long offset,
                return;
        }
        while (item_size) {
-               u64 subvol_id;
+               __le64 subvol_id;
 
                read_extent_buffer(l, &subvol_id, offset, sizeof(u64));
-               subvol_id = le64_to_cpu(subvol_id);
-               printf("\t\tsubvol_id %llu\n", (unsigned long long)subvol_id);
+               printf("\t\tsubvol_id %llu\n",
+                       (unsigned long long)le64_to_cpu(subvol_id));
                item_size -= sizeof(u64);
                offset += sizeof(u64);
        }
@@ -714,6 +851,7 @@ void btrfs_print_leaf(struct btrfs_root *root, struct extent_buffer *l)
        struct btrfs_dev_extent *dev_extent;
        struct btrfs_disk_key disk_key;
        struct btrfs_block_group_item bg_item;
+       struct btrfs_free_space_info *free_info;
        struct btrfs_dir_log_item *dlog;
        struct btrfs_qgroup_info_item *qg_info;
        struct btrfs_qgroup_limit_item *qg_limit;
@@ -721,6 +859,7 @@ void btrfs_print_leaf(struct btrfs_root *root, struct extent_buffer *l)
        u32 nr = btrfs_header_nritems(l);
        u64 objectid;
        u32 type;
+       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,
@@ -730,7 +869,7 @@ void btrfs_print_leaf(struct btrfs_root *root, struct extent_buffer *l)
        print_uuids(l);
        fflush(stdout);
        for (i = 0 ; i < nr ; i++) {
-               item = btrfs_item_nr(l, i);
+               item = btrfs_item_nr(i);
                btrfs_item_key(l, &disk_key, i);
                objectid = btrfs_disk_key_objectid(&disk_key);
                type = btrfs_disk_key_type(&disk_key);
@@ -746,13 +885,20 @@ void btrfs_print_leaf(struct btrfs_root *root, struct extent_buffer *l)
                switch (type) {
                case BTRFS_INODE_ITEM_KEY:
                        ii = btrfs_item_ptr(l, i, struct btrfs_inode_item);
-                       printf("\t\tinode generation %llu transid %llu size %llu block group %llu mode %o links %u\n",
+                       printf("\t\tinode generation %llu transid %llu size %llu nbytes %llu\n"
+                              "\t\tblock group %llu mode %o links %u uid %u gid %u\n"
+                              "\t\trdev %llu flags 0x%llx\n",
                               (unsigned long long)btrfs_inode_generation(l, ii),
                               (unsigned long long)btrfs_inode_transid(l, ii),
                               (unsigned long long)btrfs_inode_size(l, ii),
+                              (unsigned long long)btrfs_inode_nbytes(l, ii),
                               (unsigned long long)btrfs_inode_block_group(l,ii),
                               btrfs_inode_mode(l, ii),
-                              btrfs_inode_nlink(l, ii));
+                              btrfs_inode_nlink(l, ii),
+                              btrfs_inode_uid(l, ii),
+                              btrfs_inode_gid(l, ii),
+                              (unsigned long long)btrfs_inode_rdev(l,ii),
+                              (unsigned long long)btrfs_inode_flags(l,ii));
                        break;
                case BTRFS_INODE_REF_KEY:
                        iref = btrfs_item_ptr(l, i, struct btrfs_inode_ref);
@@ -828,17 +974,32 @@ void btrfs_print_leaf(struct btrfs_root *root, struct extent_buffer *l)
                case BTRFS_EXTENT_DATA_KEY:
                        fi = btrfs_item_ptr(l, i,
                                            struct btrfs_file_extent_item);
-                       print_file_extent_item(l, item, fi);
+                       print_file_extent_item(l, item, i, fi);
                        break;
                case BTRFS_BLOCK_GROUP_ITEM_KEY:
                        bi = btrfs_item_ptr(l, i,
                                            struct btrfs_block_group_item);
                        read_extent_buffer(l, &bg_item, (unsigned long)bi,
                                           sizeof(bg_item));
-                       printf("\t\tblock group used %llu chunk_objectid %llu flags %llu\n",
+                       memset(flags_str, 0, sizeof(flags_str));
+                       bg_flags_to_str(btrfs_block_group_flags(&bg_item),
+                                       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),
-                              (unsigned long long)btrfs_block_group_flags(&bg_item));
+                              flags_str);
+                       break;
+               case BTRFS_FREE_SPACE_INFO_KEY:
+                       free_info = btrfs_item_ptr(l, i, struct btrfs_free_space_info);
+                       printf("\t\tfree space info extent count %u flags %u\n",
+                              (unsigned)btrfs_free_space_extent_count(l, free_info),
+                              (unsigned)btrfs_free_space_flags(l, free_info));
+                       break;
+               case BTRFS_FREE_SPACE_EXTENT_KEY:
+                       printf("\t\tfree space extent\n");
+                       break;
+               case BTRFS_FREE_SPACE_BITMAP_KEY:
+                       printf("\t\tfree space bitmap\n");
                        break;
                case BTRFS_CHUNK_ITEM_KEY:
                        print_chunk(l, btrfs_item_ptr(l, i, struct btrfs_chunk));
@@ -865,16 +1026,18 @@ 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),
+                               flags_str,
                                (unsigned long long)
-                               btrfs_qgroup_status_flags(l, qg_status),
-                               (unsigned long long)
-                               btrfs_qgroup_status_scan(l, qg_status));
+                               btrfs_qgroup_status_rescan(l, qg_status));
                        break;
                case BTRFS_QGROUP_RELATION_KEY:
                        break;
@@ -882,18 +1045,18 @@ void btrfs_print_leaf(struct btrfs_root *root, struct extent_buffer *l)
                        qg_info = btrfs_item_ptr(l, i,
                                                 struct btrfs_qgroup_info_item);
                        printf("\t\tgeneration %llu\n"
-                            "\t\treferenced %lld referenced compressed %lld\n"
-                            "\t\texclusive %lld exclusive compressed %lld\n",
+                            "\t\treferenced %llu referenced compressed %llu\n"
+                            "\t\texclusive %llu exclusive compressed %llu\n",
                               (unsigned long long)
                               btrfs_qgroup_info_generation(l, qg_info),
-                              (long long)
+                              (unsigned long long)
                               btrfs_qgroup_info_referenced(l, qg_info),
-                              (long long)
+                              (unsigned long long)
                               btrfs_qgroup_info_referenced_compressed(l,
                                                                       qg_info),
-                              (long long)
+                              (unsigned long long)
                               btrfs_qgroup_info_exclusive(l, qg_info),
-                              (long long)
+                              (unsigned long long)
                               btrfs_qgroup_info_exclusive_compressed(l,
                                                                      qg_info));
                        break;
@@ -955,7 +1118,7 @@ void btrfs_print_tree(struct btrfs_root *root, struct extent_buffer *eb, int fol
                (unsigned long long)btrfs_header_owner(eb));
        print_uuids(eb);
        fflush(stdout);
-       size = btrfs_level_size(root, btrfs_header_level(eb) - 1);
+       size = root->nodesize;
        for (i = 0; i < nr; i++) {
                u64 blocknr = btrfs_node_blockptr(eb, i);
                btrfs_node_key(eb, &disk_key, i);
@@ -976,7 +1139,7 @@ void btrfs_print_tree(struct btrfs_root *root, struct extent_buffer *eb, int fol
                                             btrfs_node_blockptr(eb, i),
                                             size,
                                             btrfs_node_ptr_generation(eb, i));
-               if (!next) {
+               if (!extent_buffer_uptodate(next)) {
                        fprintf(stderr, "failed to read %llu in tree %llu\n",
                                (unsigned long long)btrfs_node_blockptr(eb, i),
                                (unsigned long long)btrfs_header_owner(eb));