diff options
Diffstat (limited to 'cmds-inspect-dump-tree.c')
| -rw-r--r-- | cmds-inspect-dump-tree.c | 551 |
1 files changed, 551 insertions, 0 deletions
diff --git a/cmds-inspect-dump-tree.c b/cmds-inspect-dump-tree.c new file mode 100644 index 00000000..5e206345 --- /dev/null +++ b/cmds-inspect-dump-tree.c @@ -0,0 +1,551 @@ +/* + * Copyright (C) 2007 Oracle. All rights reserved. + * + * This program is free software; you can redistribute it and/or + * modify it under the terms of the GNU General Public + * License v2 as published by the Free Software Foundation. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public + * License along with this program; if not, write to the + * Free Software Foundation, Inc., 59 Temple Place - Suite 330, + * Boston, MA 021110-1307, USA. + */ + +#include <stdio.h> +#include <stdlib.h> +#include <unistd.h> +#include <uuid/uuid.h> +#include <getopt.h> + +#include "kerncompat.h" +#include "radix-tree.h" +#include "ctree.h" +#include "disk-io.h" +#include "print-tree.h" +#include "transaction.h" +#include "volumes.h" +#include "commands.h" +#include "utils.h" +#include "cmds-inspect-dump-tree.h" + +static void print_extents(struct btrfs_root *root, struct extent_buffer *eb) +{ + int i; + u32 nr; + u32 size; + + if (!eb) + return; + + if (btrfs_is_leaf(eb)) { + btrfs_print_leaf(root, eb); + return; + } + + size = root->nodesize; + nr = btrfs_header_nritems(eb); + for (i = 0; i < nr; i++) { + struct extent_buffer *next = read_tree_block(root, + btrfs_node_blockptr(eb, i), + size, + btrfs_node_ptr_generation(eb, i)); + if (!extent_buffer_uptodate(next)) + continue; + if (btrfs_is_leaf(next) && + btrfs_header_level(eb) != 1) + BUG(); + if (btrfs_header_level(next) != + btrfs_header_level(eb) - 1) + BUG(); + print_extents(root, next); + free_extent_buffer(next); + } +} + +static void print_old_roots(struct btrfs_super_block *super) +{ + struct btrfs_root_backup *backup; + int i; + + for (i = 0; i < BTRFS_NUM_BACKUP_ROOTS; i++) { + backup = super->super_roots + i; + printf("btrfs root backup slot %d\n", i); + printf("\ttree root gen %llu block %llu\n", + (unsigned long long)btrfs_backup_tree_root_gen(backup), + (unsigned long long)btrfs_backup_tree_root(backup)); + + printf("\t\textent root gen %llu block %llu\n", + (unsigned long long)btrfs_backup_extent_root_gen(backup), + (unsigned long long)btrfs_backup_extent_root(backup)); + + printf("\t\tchunk root gen %llu block %llu\n", + (unsigned long long)btrfs_backup_chunk_root_gen(backup), + (unsigned long long)btrfs_backup_chunk_root(backup)); + + printf("\t\tdevice root gen %llu block %llu\n", + (unsigned long long)btrfs_backup_dev_root_gen(backup), + (unsigned long long)btrfs_backup_dev_root(backup)); + + printf("\t\tcsum root gen %llu block %llu\n", + (unsigned long long)btrfs_backup_csum_root_gen(backup), + (unsigned long long)btrfs_backup_csum_root(backup)); + + printf("\t\tfs root gen %llu block %llu\n", + (unsigned long long)btrfs_backup_fs_root_gen(backup), + (unsigned long long)btrfs_backup_fs_root(backup)); + + printf("\t\t%llu used %llu total %llu devices\n", + (unsigned long long)btrfs_backup_bytes_used(backup), + (unsigned long long)btrfs_backup_total_bytes(backup), + (unsigned long long)btrfs_backup_num_devices(backup)); + } +} + +/* + * Convert a tree name from various forms to the numerical id if possible + * Accepted forms: + * - case does not matter + * - same as the key name, BTRFS_ROOT_TREE_OBJECTID + * - dtto shortened, BTRFS_ROOT_TREE + * - dtto without prefix, ROOT_TREE + * - common name, ROOT, CHUNK, EXTENT, ... + * - dtto alias, DEVICE for DEV, CHECKSUM for CSUM + * + * Returns 0 if the tree id was not recognized. + */ +static u64 treeid_from_string(const char *str, const char **end) +{ + int match = 0; + int i; + u64 id; + static struct treename { + const char *name; + u64 id; + } tn[] = { + { "ROOT", BTRFS_ROOT_TREE_OBJECTID }, + { "EXTENT", BTRFS_EXTENT_TREE_OBJECTID }, + { "CHUNK", BTRFS_CHUNK_TREE_OBJECTID }, + { "DEVICE", BTRFS_DEV_TREE_OBJECTID }, + { "DEV", BTRFS_DEV_TREE_OBJECTID }, + { "FS_TREE", BTRFS_FS_TREE_OBJECTID }, + { "CSUM", BTRFS_CSUM_TREE_OBJECTID }, + { "CHECKSUM", BTRFS_CSUM_TREE_OBJECTID }, + { "QUOTA", BTRFS_QUOTA_TREE_OBJECTID }, + { "UUID", BTRFS_UUID_TREE_OBJECTID }, + { "FREE_SPACE", BTRFS_FREE_SPACE_TREE_OBJECTID }, + { "TREE_LOG_FIXUP", BTRFS_TREE_LOG_FIXUP_OBJECTID }, + { "TREE_LOG", BTRFS_TREE_LOG_OBJECTID }, + { "TREE_RELOC", BTRFS_TREE_RELOC_OBJECTID }, + { "DATA_RELOC", BTRFS_DATA_RELOC_TREE_OBJECTID } + }; + + if (strncasecmp("BTRFS_", str, strlen("BTRFS_")) == 0) + str += strlen("BTRFS_"); + + for (i = 0; i < ARRAY_SIZE(tn); i++) { + int len = strlen(tn[i].name); + + if (strncasecmp(tn[i].name, str, len) == 0) { + id = tn[i].id; + match = 1; + str += len; + break; + } + } + + if (!match) + return 0; + + if (strncasecmp("_TREE", str, strlen("_TREE")) == 0) + str += strlen("_TREE"); + + if (strncasecmp("_OBJECTID", str, strlen("_OBJECTID")) == 0) + str += strlen("_OBJECTID"); + + *end = str; + + return id; +} + +const char * const cmd_inspect_dump_tree_usage[] = { + "btrfs inspect-internal dump-tree [options] device", + "Dump tree structures from a given device", + "Dump tree structures from a given device in textual form, expand keys to human", + "readable equivalents where possible.", + "Note: contains file names, consider that if you're asked to send the dump", + "for analysis.", + "", + "-e|--extents print only extent info: extent and device trees", + "-d|--device print only device info: tree root, chunk and device trees", + "-r|--roots print only short root node info", + "-R|--backups same as --roots plus print backup root info", + "-u|--uuid print only the uuid tree", + "-b|--block <block_num> print info from the specified block only", + "-t|--tree <tree_id> print only tree with the given id (string or number)", + NULL +}; + +int cmd_inspect_dump_tree(int argc, char **argv) +{ + struct btrfs_root *root; + struct btrfs_fs_info *info; + struct btrfs_path path; + struct btrfs_key key; + struct btrfs_root_item ri; + struct extent_buffer *leaf; + struct btrfs_disk_key disk_key; + struct btrfs_key found_key; + char uuidbuf[BTRFS_UUID_UNPARSED_SIZE]; + int ret; + int slot; + int extent_only = 0; + int device_only = 0; + int uuid_tree_only = 0; + int roots_only = 0; + int root_backups = 0; + u64 block_only = 0; + struct btrfs_root *tree_root_scan; + u64 tree_id = 0; + + while (1) { + int c; + static const struct option long_options[] = { + { "extents", no_argument, NULL, 'e'}, + { "device", no_argument, NULL, 'd'}, + { "roots", no_argument, NULL, 'r'}, + { "backups", no_argument, NULL, 'R'}, + { "uuid", no_argument, NULL, 'u'}, + { "block", required_argument, NULL, 'b'}, + { "tree", required_argument, NULL, 't'}, + { NULL, 0, NULL, 0 } + }; + + c = getopt_long(argc, argv, "deb:rRut:", long_options, NULL); + if (c < 0) + break; + switch (c) { + case 'e': + extent_only = 1; + break; + case 'd': + device_only = 1; + break; + case 'r': + roots_only = 1; + break; + case 'u': + uuid_tree_only = 1; + break; + case 'R': + roots_only = 1; + root_backups = 1; + break; + case 'b': + block_only = arg_strtou64(optarg); + break; + case 't': + if (string_is_numerical(optarg)) { + tree_id = arg_strtou64(optarg); + } else { + const char *end = NULL; + + tree_id = treeid_from_string(optarg, &end); + + if (*end) { + error("unexpected tree id suffix of '%s': %s\n", + optarg, end); + exit(1); + } + } + if (!tree_id) { + error("unrecognized tree id: %s\n", + optarg); + exit(1); + } + break; + default: + usage(cmd_inspect_dump_tree_usage); + } + } + + if (check_argc_exact(argc - optind, 1)) + usage(cmd_inspect_dump_tree_usage); + + ret = check_arg_type(argv[optind]); + if (ret != BTRFS_ARG_BLKDEV && ret != BTRFS_ARG_REG) { + error("not a block device or regular file: %s", argv[optind]); + goto out; + } + + printf("%s\n", PACKAGE_STRING); + + info = open_ctree_fs_info(argv[optind], 0, 0, 0, OPEN_CTREE_PARTIAL); + if (!info) { + error("unable to open %s", argv[optind]); + goto out; + } + + root = info->fs_root; + if (!root) { + error("unable to open %s", argv[optind]); + goto out; + } + + if (block_only) { + leaf = read_tree_block(root, + block_only, + root->nodesize, 0); + + if (extent_buffer_uptodate(leaf) && + btrfs_header_level(leaf) != 0) { + free_extent_buffer(leaf); + leaf = NULL; + } + + if (!leaf) { + leaf = read_tree_block(root, + block_only, + root->nodesize, 0); + } + if (!extent_buffer_uptodate(leaf)) { + error("failed to read %llu", + (unsigned long long)block_only); + goto close_root; + } + btrfs_print_tree(root, leaf, 0); + free_extent_buffer(leaf); + goto close_root; + } + + if (!(extent_only || uuid_tree_only || tree_id)) { + if (roots_only) { + printf("root tree: %llu level %d\n", + (unsigned long long)info->tree_root->node->start, + btrfs_header_level(info->tree_root->node)); + printf("chunk tree: %llu level %d\n", + (unsigned long long)info->chunk_root->node->start, + btrfs_header_level(info->chunk_root->node)); + } else { + if (info->tree_root->node) { + printf("root tree\n"); + btrfs_print_tree(info->tree_root, + info->tree_root->node, 1); + } + + if (info->chunk_root->node) { + printf("chunk tree\n"); + btrfs_print_tree(info->chunk_root, + info->chunk_root->node, 1); + } + } + } + tree_root_scan = info->tree_root; + + btrfs_init_path(&path); +again: + if (!extent_buffer_uptodate(tree_root_scan->node)) + goto no_node; + + /* + * Tree's that are not pointed by the tree of tree roots + */ + if (tree_id && tree_id == BTRFS_ROOT_TREE_OBJECTID) { + if (!info->tree_root->node) { + error("cannot print root tree, invalid pointer"); + goto no_node; + } + printf("root tree\n"); + btrfs_print_tree(info->tree_root, info->tree_root->node, 1); + goto no_node; + } + + if (tree_id && tree_id == BTRFS_CHUNK_TREE_OBJECTID) { + if (!info->chunk_root->node) { + error("cannot print chunk tree, invalid pointer"); + goto no_node; + } + printf("chunk tree\n"); + btrfs_print_tree(info->chunk_root, info->chunk_root->node, 1); + goto no_node; + } + + key.offset = 0; + key.objectid = 0; + btrfs_set_key_type(&key, BTRFS_ROOT_ITEM_KEY); + ret = btrfs_search_slot(NULL, tree_root_scan, &key, &path, 0, 0); + BUG_ON(ret < 0); + while (1) { + leaf = path.nodes[0]; + slot = path.slots[0]; + if (slot >= btrfs_header_nritems(leaf)) { + ret = btrfs_next_leaf(tree_root_scan, &path); + if (ret != 0) + break; + leaf = path.nodes[0]; + slot = path.slots[0]; + } + btrfs_item_key(leaf, &disk_key, path.slots[0]); + btrfs_disk_key_to_cpu(&found_key, &disk_key); + if (btrfs_key_type(&found_key) == BTRFS_ROOT_ITEM_KEY) { + unsigned long offset; + struct extent_buffer *buf; + int skip = extent_only | device_only | uuid_tree_only; + + offset = btrfs_item_ptr_offset(leaf, slot); + read_extent_buffer(leaf, &ri, offset, sizeof(ri)); + buf = read_tree_block(tree_root_scan, + btrfs_root_bytenr(&ri), + tree_root_scan->nodesize, + 0); + if (!extent_buffer_uptodate(buf)) + goto next; + if (tree_id && found_key.objectid != tree_id) { + free_extent_buffer(buf); + goto next; + } + + switch (found_key.objectid) { + case BTRFS_ROOT_TREE_OBJECTID: + if (!skip) + printf("root"); + break; + case BTRFS_EXTENT_TREE_OBJECTID: + if (!device_only && !uuid_tree_only) + skip = 0; + if (!skip) + printf("extent"); + break; + case BTRFS_CHUNK_TREE_OBJECTID: + if (!skip) { + printf("chunk"); + } + break; + case BTRFS_DEV_TREE_OBJECTID: + if (!uuid_tree_only) + skip = 0; + if (!skip) + printf("device"); + break; + case BTRFS_FS_TREE_OBJECTID: + if (!skip) { + printf("fs"); + } + break; + case BTRFS_ROOT_TREE_DIR_OBJECTID: + skip = 0; + printf("directory"); + break; + case BTRFS_CSUM_TREE_OBJECTID: + if (!skip) { + printf("checksum"); + } + break; + case BTRFS_ORPHAN_OBJECTID: + if (!skip) { + printf("orphan"); + } + break; + case BTRFS_TREE_LOG_OBJECTID: + if (!skip) { + printf("log"); + } + break; + case BTRFS_TREE_LOG_FIXUP_OBJECTID: + if (!skip) { + printf("log fixup"); + } + break; + case BTRFS_TREE_RELOC_OBJECTID: + if (!skip) { + printf("reloc"); + } + break; + case BTRFS_DATA_RELOC_TREE_OBJECTID: + if (!skip) { + printf("data reloc"); + } + break; + case BTRFS_EXTENT_CSUM_OBJECTID: + if (!skip) { + printf("extent checksum"); + } + break; + case BTRFS_QUOTA_TREE_OBJECTID: + if (!skip) { + printf("quota"); + } + break; + case BTRFS_UUID_TREE_OBJECTID: + if (!extent_only && !device_only) + skip = 0; + if (!skip) + printf("uuid"); + break; + case BTRFS_FREE_SPACE_TREE_OBJECTID: + if (!skip) + printf("free space"); + break; + case BTRFS_MULTIPLE_OBJECTIDS: + if (!skip) { + printf("multiple"); + } + break; + default: + if (!skip) { + printf("file"); + } + } + if (extent_only && !skip) { + printf(" tree "); + btrfs_print_key(&disk_key); + printf("\n"); + print_extents(tree_root_scan, buf); + } else if (!skip) { + printf(" tree "); + btrfs_print_key(&disk_key); + if (roots_only) { + printf(" %llu level %d\n", + (unsigned long long)buf->start, + btrfs_header_level(buf)); + } else { + printf(" \n"); + btrfs_print_tree(tree_root_scan, buf, 1); + } + } + free_extent_buffer(buf); + } +next: + path.slots[0]++; + } +no_node: + btrfs_release_path(&path); + + if (tree_root_scan == info->tree_root && + info->log_root_tree) { + tree_root_scan = info->log_root_tree; + goto again; + } + + if (extent_only || device_only || uuid_tree_only) + goto close_root; + + if (root_backups) + print_old_roots(info->super_copy); + + printf("total bytes %llu\n", + (unsigned long long)btrfs_super_total_bytes(info->super_copy)); + printf("bytes used %llu\n", + (unsigned long long)btrfs_super_bytes_used(info->super_copy)); + uuidbuf[BTRFS_UUID_UNPARSED_SIZE - 1] = '\0'; + uuid_unparse(info->super_copy->fsid, uuidbuf); + printf("uuid %s\n", uuidbuf); +close_root: + ret = close_ctree(root); +out: + return !!ret; +} |