btrfs-progs: tune: factor out checksum change to own file
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
David Sterba
parent
44fecc5fd2
commit
3cf00a0a38
2
Makefile
2
Makefile
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@ -235,7 +235,7 @@ convert_objects = convert/main.o convert/common.o convert/source-fs.o \
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mkfs_objects = mkfs/main.o mkfs/common.o mkfs/rootdir.o
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image_objects = image/main.o image/sanitize.o
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tune_objects = tune/main.o tune/seeding.o tune/change-uuid.o tune/change-metadata-uuid.o \
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tune/convert-bgt.o
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tune/convert-bgt.o tune/change-csum.o
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all_objects = $(objects) $(cmds_objects) $(libbtrfs_objects) $(convert_objects) \
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$(mkfs_objects) $(image_objects) $(tune_objects) $(libbtrfsutil_objects)
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332
tune/change-csum.c
Normal file
332
tune/change-csum.c
Normal file
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@ -0,0 +1,332 @@
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/*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public
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* License v2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public
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* License along with this program; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 021110-1307, USA.
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*/
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#include "kerncompat.h"
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#include <errno.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include "kernel-shared/ctree.h"
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#include "kernel-shared/disk-io.h"
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#include "kernel-shared/extent_io.h"
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#include "kernel-shared/transaction.h"
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#include "common/messages.h"
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static int delete_csum_items(struct btrfs_trans_handle *trans,
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struct btrfs_fs_info *fs_info)
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{
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struct btrfs_root *root = btrfs_csum_root(fs_info, 0);
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struct btrfs_path path;
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struct btrfs_key key;
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int nr;
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int ret;
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btrfs_init_path(&path);
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key.objectid = BTRFS_EXTENT_CSUM_OBJECTID;
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key.type = BTRFS_EXTENT_CSUM_KEY;
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key.offset = 0;
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while (1) {
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ret = btrfs_search_slot(trans, root, &key, &path, -1, 1);
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if (ret < 0)
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goto out;
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nr = btrfs_header_nritems(path.nodes[0]);
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if (!nr)
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break;
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path.slots[0] = 0;
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ret = btrfs_del_items(trans, root, &path, 0, nr);
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if (ret)
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goto out;
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btrfs_release_path(&path);
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}
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ret = 0;
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out:
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btrfs_release_path(&path);
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return ret;
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}
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static int change_extents_csum(struct btrfs_fs_info *fs_info, int csum_type)
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{
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struct btrfs_root *root = btrfs_extent_root(fs_info, 0);
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struct btrfs_path path;
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struct btrfs_key key = {0, 0, 0};
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int ret = 0;
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btrfs_init_path(&path);
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/*
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* Here we don't use transaction as it will takes a lot of reserve
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* space, and that will make a near-full btrfs unable to change csums
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*/
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ret = btrfs_search_slot(NULL, root, &key, &path, 0, 0);
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if (ret < 0)
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goto out;
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while (1) {
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struct btrfs_extent_item *ei;
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struct extent_buffer *eb;
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u64 flags;
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u64 bytenr;
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btrfs_item_key_to_cpu(path.nodes[0], &key, path.slots[0]);
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if (key.type != BTRFS_EXTENT_ITEM_KEY &&
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key.type != BTRFS_METADATA_ITEM_KEY)
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goto next;
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ei = btrfs_item_ptr(path.nodes[0], path.slots[0],
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struct btrfs_extent_item);
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flags = btrfs_extent_flags(path.nodes[0], ei);
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if (!(flags & BTRFS_EXTENT_FLAG_TREE_BLOCK))
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goto next;
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bytenr = key.objectid;
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eb = read_tree_block(fs_info, bytenr, 0);
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if (IS_ERR(eb)) {
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error("failed to read tree block: %llu", bytenr);
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ret = PTR_ERR(eb);
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goto out;
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}
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/* Only rewrite block */
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/* printf("CSUM: start %llu\n", eb->start); */
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ret = write_tree_block(NULL, fs_info, eb);
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free_extent_buffer(eb);
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if (ret < 0) {
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error("failed to change csum of tree block: %llu", bytenr);
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goto out;
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}
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next:
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ret = btrfs_next_item(root, &path);
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if (ret < 0)
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goto out;
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if (ret > 0) {
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ret = 0;
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goto out;
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}
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}
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out:
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btrfs_release_path(&path);
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return ret;
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}
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static int change_devices_csum(struct btrfs_root *root, int csum_type)
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{
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struct btrfs_fs_info *fs_info = root->fs_info;
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struct btrfs_path path;
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struct btrfs_key key = {0, 0, 0};
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int ret = 0;
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btrfs_init_path(&path);
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/* No transaction again */
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ret = btrfs_search_slot(NULL, root, &key, &path, 0, 0);
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if (ret < 0)
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goto out;
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while (1) {
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btrfs_item_key_to_cpu(path.nodes[0], &key, path.slots[0]);
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if (key.type != BTRFS_DEV_ITEM_KEY ||
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key.objectid != BTRFS_DEV_ITEMS_OBJECTID)
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goto next;
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/* Only rewrite block */
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ret = write_tree_block(NULL, fs_info, path.nodes[0]);
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if (ret < 0)
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goto out;
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next:
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ret = btrfs_next_item(root, &path);
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if (ret < 0)
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goto out;
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if (ret > 0) {
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ret = 0;
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goto out;
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}
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}
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out:
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btrfs_release_path(&path);
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return ret;
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}
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static int populate_csum(struct btrfs_trans_handle *trans,
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struct btrfs_fs_info *fs_info, char *buf, u64 start,
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u64 len)
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{
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u64 offset = 0;
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u64 sectorsize;
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int ret = 0;
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while (offset < len) {
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sectorsize = fs_info->sectorsize;
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ret = read_data_from_disk(fs_info, buf, start + offset,
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§orsize, 0);
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if (ret)
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break;
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ret = btrfs_csum_file_block(trans, start + len, start + offset,
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buf, sectorsize);
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if (ret)
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break;
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offset += sectorsize;
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}
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return ret;
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}
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static int fill_csum_tree_from_extent(struct btrfs_fs_info *fs_info)
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{
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struct btrfs_root *extent_root = btrfs_extent_root(fs_info, 0);
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struct btrfs_trans_handle *trans;
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struct btrfs_path path;
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struct btrfs_extent_item *ei;
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struct extent_buffer *leaf;
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char *buf;
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struct btrfs_key key;
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int ret;
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trans = btrfs_start_transaction(extent_root, 1);
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if (trans == NULL) {
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/* fixme */
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printf("cannot start transaction\n");
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return -EINVAL;
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}
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btrfs_init_path(&path);
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key.objectid = 0;
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key.type = BTRFS_EXTENT_ITEM_KEY;
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key.offset = 0;
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ret = btrfs_search_slot(NULL, extent_root, &key, &path, 0, 0);
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if (ret < 0) {
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btrfs_release_path(&path);
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return ret;
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}
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buf = malloc(fs_info->sectorsize);
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if (!buf) {
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btrfs_release_path(&path);
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return -ENOMEM;
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}
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ret = delete_csum_items(trans, fs_info);
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if (ret) {
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error("unable to delete all checksum items: %d", ret);
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return -EIO;
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}
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while (1) {
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if (path.slots[0] >= btrfs_header_nritems(path.nodes[0])) {
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ret = btrfs_next_leaf(extent_root, &path);
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if (ret < 0)
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break;
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if (ret) {
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ret = 0;
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break;
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}
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}
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leaf = path.nodes[0];
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btrfs_item_key_to_cpu(leaf, &key, path.slots[0]);
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if (key.type != BTRFS_EXTENT_ITEM_KEY) {
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path.slots[0]++;
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continue;
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}
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ei = btrfs_item_ptr(leaf, path.slots[0], struct btrfs_extent_item);
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if (!(btrfs_extent_flags(leaf, ei) & BTRFS_EXTENT_FLAG_DATA)) {
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path.slots[0]++;
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continue;
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}
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ret = populate_csum(trans, fs_info, buf, key.objectid, key.offset);
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if (ret)
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break;
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path.slots[0]++;
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}
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btrfs_release_path(&path);
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free(buf);
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/* dont' commit if thre's error */
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ret = btrfs_commit_transaction(trans, extent_root);
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return ret;
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}
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int rewrite_checksums(struct btrfs_root *root, int csum_type)
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{
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struct btrfs_fs_info *fs_info = root->fs_info;
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struct btrfs_super_block *disk_super;
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struct btrfs_trans_handle *trans;
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u64 super_flags;
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int ret;
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disk_super = root->fs_info->super_copy;
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super_flags = btrfs_super_flags(disk_super);
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/* FIXME: Sanity checks */
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if (0) {
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error("UUID rewrite in progress, cannot change fsid");
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return 1;
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}
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fs_info->force_csum_type = csum_type;
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/* Step 1 sets the in progress flag, no other change to the sb */
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printf("Set superblock flag CHANGING_CSUM\n");
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trans = btrfs_start_transaction(root, 1);
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super_flags |= BTRFS_SUPER_FLAG_CHANGING_CSUM;
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btrfs_set_super_flags(disk_super, super_flags);
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ret = btrfs_commit_transaction(trans, root);
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if (ret < 0)
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return ret;
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/* Change extents first */
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printf("Change fsid in extents\n");
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ret = change_extents_csum(fs_info, csum_type);
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if (ret < 0) {
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error("failed to change csum of metadata: %d", ret);
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goto out;
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}
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/* Then devices */
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printf("Change csum in chunk tree\n");
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ret = change_devices_csum(fs_info->chunk_root, csum_type);
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if (ret < 0) {
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error("failed to change UUID of devices: %d", ret);
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goto out;
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}
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/* DATA */
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printf("Change csum of data blocks\n");
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ret = fill_csum_tree_from_extent(fs_info);
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if (ret < 0)
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goto out;
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/* Last, change fsid in super */
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ret = write_all_supers(fs_info);
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if (ret < 0)
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goto out;
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/* All checksums done, drop the flag, super block csum will get updated */
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printf("Clear superblock flag CHANGING_CSUM\n");
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super_flags = btrfs_super_flags(fs_info->super_copy);
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super_flags &= ~BTRFS_SUPER_FLAG_CHANGING_CSUM;
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btrfs_set_super_flags(fs_info->super_copy, super_flags);
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btrfs_set_super_csum_type(disk_super, csum_type);
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ret = write_all_supers(fs_info);
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printf("Checksum change finished\n");
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out:
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/* check errors */
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return ret;
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}
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307
tune/main.c
307
tune/main.c
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@ -47,313 +47,6 @@
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static char *device;
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static int force = 0;
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static int delete_csum_items(struct btrfs_trans_handle *trans,
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struct btrfs_fs_info *fs_info)
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{
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struct btrfs_root *root = btrfs_csum_root(fs_info, 0);
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struct btrfs_path path;
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struct btrfs_key key;
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int nr;
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int ret;
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btrfs_init_path(&path);
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key.objectid = BTRFS_EXTENT_CSUM_OBJECTID;
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key.type = BTRFS_EXTENT_CSUM_KEY;
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key.offset = 0;
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while (1) {
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ret = btrfs_search_slot(trans, root, &key, &path, -1, 1);
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if (ret < 0)
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goto out;
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nr = btrfs_header_nritems(path.nodes[0]);
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if (!nr)
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break;
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path.slots[0] = 0;
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ret = btrfs_del_items(trans, root, &path, 0, nr);
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if (ret)
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goto out;
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btrfs_release_path(&path);
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}
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ret = 0;
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out:
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btrfs_release_path(&path);
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return ret;
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}
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static int change_extents_csum(struct btrfs_fs_info *fs_info, int csum_type)
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{
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struct btrfs_root *root = btrfs_extent_root(fs_info, 0);
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struct btrfs_path path;
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struct btrfs_key key = {0, 0, 0};
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int ret = 0;
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btrfs_init_path(&path);
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/*
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* Here we don't use transaction as it will takes a lot of reserve
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* space, and that will make a near-full btrfs unable to change csums
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*/
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ret = btrfs_search_slot(NULL, root, &key, &path, 0, 0);
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if (ret < 0)
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goto out;
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while (1) {
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struct btrfs_extent_item *ei;
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struct extent_buffer *eb;
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u64 flags;
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u64 bytenr;
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btrfs_item_key_to_cpu(path.nodes[0], &key, path.slots[0]);
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if (key.type != BTRFS_EXTENT_ITEM_KEY &&
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key.type != BTRFS_METADATA_ITEM_KEY)
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goto next;
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ei = btrfs_item_ptr(path.nodes[0], path.slots[0],
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struct btrfs_extent_item);
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flags = btrfs_extent_flags(path.nodes[0], ei);
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if (!(flags & BTRFS_EXTENT_FLAG_TREE_BLOCK))
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goto next;
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bytenr = key.objectid;
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eb = read_tree_block(fs_info, bytenr, 0);
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if (IS_ERR(eb)) {
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error("failed to read tree block: %llu", bytenr);
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ret = PTR_ERR(eb);
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goto out;
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}
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/* Only rewrite block */
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/* printf("CSUM: start %llu\n", eb->start); */
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ret = write_tree_block(NULL, fs_info, eb);
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free_extent_buffer(eb);
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if (ret < 0) {
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error("failed to change csum of tree block: %llu", bytenr);
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goto out;
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}
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next:
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ret = btrfs_next_item(root, &path);
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if (ret < 0)
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goto out;
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if (ret > 0) {
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ret = 0;
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goto out;
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}
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}
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out:
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btrfs_release_path(&path);
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return ret;
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}
|
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static int change_devices_csum(struct btrfs_root *root, int csum_type)
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{
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struct btrfs_fs_info *fs_info = root->fs_info;
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struct btrfs_path path;
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struct btrfs_key key = {0, 0, 0};
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int ret = 0;
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|
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btrfs_init_path(&path);
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/* No transaction again */
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ret = btrfs_search_slot(NULL, root, &key, &path, 0, 0);
|
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if (ret < 0)
|
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goto out;
|
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|
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while (1) {
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btrfs_item_key_to_cpu(path.nodes[0], &key, path.slots[0]);
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if (key.type != BTRFS_DEV_ITEM_KEY ||
|
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key.objectid != BTRFS_DEV_ITEMS_OBJECTID)
|
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goto next;
|
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/* Only rewrite block */
|
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ret = write_tree_block(NULL, fs_info, path.nodes[0]);
|
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if (ret < 0)
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goto out;
|
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next:
|
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ret = btrfs_next_item(root, &path);
|
||||
if (ret < 0)
|
||||
goto out;
|
||||
if (ret > 0) {
|
||||
ret = 0;
|
||||
goto out;
|
||||
}
|
||||
}
|
||||
out:
|
||||
btrfs_release_path(&path);
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int populate_csum(struct btrfs_trans_handle *trans,
|
||||
struct btrfs_fs_info *fs_info, char *buf, u64 start,
|
||||
u64 len)
|
||||
{
|
||||
u64 offset = 0;
|
||||
u64 sectorsize;
|
||||
int ret = 0;
|
||||
|
||||
while (offset < len) {
|
||||
sectorsize = fs_info->sectorsize;
|
||||
ret = read_data_from_disk(fs_info, buf, start + offset,
|
||||
§orsize, 0);
|
||||
if (ret)
|
||||
break;
|
||||
ret = btrfs_csum_file_block(trans, start + len, start + offset,
|
||||
buf, sectorsize);
|
||||
if (ret)
|
||||
break;
|
||||
offset += sectorsize;
|
||||
}
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int fill_csum_tree_from_extent(struct btrfs_fs_info *fs_info)
|
||||
{
|
||||
struct btrfs_root *extent_root = btrfs_extent_root(fs_info, 0);
|
||||
struct btrfs_trans_handle *trans;
|
||||
struct btrfs_path path;
|
||||
struct btrfs_extent_item *ei;
|
||||
struct extent_buffer *leaf;
|
||||
char *buf;
|
||||
struct btrfs_key key;
|
||||
int ret;
|
||||
|
||||
trans = btrfs_start_transaction(extent_root, 1);
|
||||
if (trans == NULL) {
|
||||
/* fixme */
|
||||
printf("cannot start transaction\n");
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
btrfs_init_path(&path);
|
||||
key.objectid = 0;
|
||||
key.type = BTRFS_EXTENT_ITEM_KEY;
|
||||
key.offset = 0;
|
||||
ret = btrfs_search_slot(NULL, extent_root, &key, &path, 0, 0);
|
||||
if (ret < 0) {
|
||||
btrfs_release_path(&path);
|
||||
return ret;
|
||||
}
|
||||
|
||||
buf = malloc(fs_info->sectorsize);
|
||||
if (!buf) {
|
||||
btrfs_release_path(&path);
|
||||
return -ENOMEM;
|
||||
}
|
||||
|
||||
ret = delete_csum_items(trans, fs_info);
|
||||
if (ret) {
|
||||
error("unable to delete all checksum items: %d", ret);
|
||||
return -EIO;
|
||||
}
|
||||
|
||||
while (1) {
|
||||
if (path.slots[0] >= btrfs_header_nritems(path.nodes[0])) {
|
||||
ret = btrfs_next_leaf(extent_root, &path);
|
||||
if (ret < 0)
|
||||
break;
|
||||
if (ret) {
|
||||
ret = 0;
|
||||
break;
|
||||
}
|
||||
}
|
||||
leaf = path.nodes[0];
|
||||
|
||||
btrfs_item_key_to_cpu(leaf, &key, path.slots[0]);
|
||||
if (key.type != BTRFS_EXTENT_ITEM_KEY) {
|
||||
path.slots[0]++;
|
||||
continue;
|
||||
}
|
||||
|
||||
ei = btrfs_item_ptr(leaf, path.slots[0], struct btrfs_extent_item);
|
||||
if (!(btrfs_extent_flags(leaf, ei) & BTRFS_EXTENT_FLAG_DATA)) {
|
||||
path.slots[0]++;
|
||||
continue;
|
||||
}
|
||||
|
||||
ret = populate_csum(trans, fs_info, buf, key.objectid, key.offset);
|
||||
if (ret)
|
||||
break;
|
||||
path.slots[0]++;
|
||||
}
|
||||
|
||||
btrfs_release_path(&path);
|
||||
free(buf);
|
||||
|
||||
/* dont' commit if thre's error */
|
||||
ret = btrfs_commit_transaction(trans, extent_root);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int rewrite_checksums(struct btrfs_root *root, int csum_type)
|
||||
{
|
||||
struct btrfs_fs_info *fs_info = root->fs_info;
|
||||
struct btrfs_super_block *disk_super;
|
||||
struct btrfs_trans_handle *trans;
|
||||
u64 super_flags;
|
||||
int ret;
|
||||
|
||||
disk_super = root->fs_info->super_copy;
|
||||
super_flags = btrfs_super_flags(disk_super);
|
||||
|
||||
/* FIXME: Sanity checks */
|
||||
if (0) {
|
||||
error("UUID rewrite in progress, cannot change fsid");
|
||||
return 1;
|
||||
}
|
||||
|
||||
fs_info->force_csum_type = csum_type;
|
||||
|
||||
/* Step 1 sets the in progress flag, no other change to the sb */
|
||||
printf("Set superblock flag CHANGING_CSUM\n");
|
||||
trans = btrfs_start_transaction(root, 1);
|
||||
super_flags |= BTRFS_SUPER_FLAG_CHANGING_CSUM;
|
||||
btrfs_set_super_flags(disk_super, super_flags);
|
||||
ret = btrfs_commit_transaction(trans, root);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
/* Change extents first */
|
||||
printf("Change fsid in extents\n");
|
||||
ret = change_extents_csum(fs_info, csum_type);
|
||||
if (ret < 0) {
|
||||
error("failed to change csum of metadata: %d", ret);
|
||||
goto out;
|
||||
}
|
||||
|
||||
/* Then devices */
|
||||
printf("Change csum in chunk tree\n");
|
||||
ret = change_devices_csum(fs_info->chunk_root, csum_type);
|
||||
if (ret < 0) {
|
||||
error("failed to change UUID of devices: %d", ret);
|
||||
goto out;
|
||||
}
|
||||
|
||||
/* DATA */
|
||||
printf("Change csum of data blocks\n");
|
||||
ret = fill_csum_tree_from_extent(fs_info);
|
||||
if (ret < 0)
|
||||
goto out;
|
||||
|
||||
/* Last, change fsid in super */
|
||||
ret = write_all_supers(fs_info);
|
||||
if (ret < 0)
|
||||
goto out;
|
||||
|
||||
/* All checksums done, drop the flag, super block csum will get updated */
|
||||
printf("Clear superblock flag CHANGING_CSUM\n");
|
||||
super_flags = btrfs_super_flags(fs_info->super_copy);
|
||||
super_flags &= ~BTRFS_SUPER_FLAG_CHANGING_CSUM;
|
||||
btrfs_set_super_flags(fs_info->super_copy, super_flags);
|
||||
btrfs_set_super_csum_type(disk_super, csum_type);
|
||||
ret = write_all_supers(fs_info);
|
||||
printf("Checksum change finished\n");
|
||||
out:
|
||||
/* check errors */
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int set_super_incompat_flags(struct btrfs_root *root, u64 flags)
|
||||
{
|
||||
struct btrfs_trans_handle *trans;
|
||||
|
|
|
|||
|
|
@ -29,4 +29,6 @@ int set_metadata_uuid(struct btrfs_root *root, const char *uuid_string);
|
|||
|
||||
int convert_to_bg_tree(struct btrfs_fs_info *fs_info);
|
||||
|
||||
int rewrite_checksums(struct btrfs_root *root, int csum_type);
|
||||
|
||||
#endif
|
||||
|
|
|
|||
Loading…
Reference in a new issue