aa5f0626f8
All we need for restore to work is the chunk root, the tree root and the fs root we want to restore from. So to do this we need to make a few adjustments 1) Make open_ctree_fs_info fail completely if it can't read the chunk tree. There is no sense in continuing if we can't read the chunk tree since we won't be able to translate logical to physical blocks. 2) Use open_ctree_fs_info in restore, and if we didn't load a tree root or fs root go ahead and try to set those up manually ourselves. This is related to work I did last year on restore, but it uses the open_ctree_fs_info instead of my open coded open_ctree. Thanks, Signed-off-by: Josef Bacik <jbacik@fusionio.com>
90 lines
3.6 KiB
C
90 lines
3.6 KiB
C
/*
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* Copyright (C) 2007 Oracle. All rights reserved.
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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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#ifndef __DISKIO__
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#define __DISKIO__
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#define BTRFS_SUPER_INFO_OFFSET (64 * 1024)
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#define BTRFS_SUPER_INFO_SIZE 4096
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#define BTRFS_SUPER_MIRROR_MAX 3
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#define BTRFS_SUPER_MIRROR_SHIFT 12
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static inline u64 btrfs_sb_offset(int mirror)
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{
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u64 start = 16 * 1024;
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if (mirror)
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return start << (BTRFS_SUPER_MIRROR_SHIFT * mirror);
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return BTRFS_SUPER_INFO_OFFSET;
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}
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struct btrfs_device;
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struct extent_buffer *read_tree_block(struct btrfs_root *root, u64 bytenr,
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u32 blocksize, u64 parent_transid);
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int readahead_tree_block(struct btrfs_root *root, u64 bytenr, u32 blocksize,
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u64 parent_transid);
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struct extent_buffer *btrfs_find_create_tree_block(struct btrfs_root *root,
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u64 bytenr, u32 blocksize);
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int __setup_root(u32 nodesize, u32 leafsize, u32 sectorsize,
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u32 stripesize, struct btrfs_root *root,
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struct btrfs_fs_info *fs_info, u64 objectid);
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int clean_tree_block(struct btrfs_trans_handle *trans,
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struct btrfs_root *root, struct extent_buffer *buf);
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struct btrfs_root *open_ctree(const char *filename, u64 sb_bytenr, int writes);
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struct btrfs_root *open_ctree_fd(int fp, const char *path, u64 sb_bytenr,
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int writes);
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struct btrfs_fs_info *open_ctree_fs_info(const char *filename,
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u64 sb_bytenr, u64 root_tree_bytenr,
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int writes, int partial);
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int close_ctree(struct btrfs_root *root);
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int write_all_supers(struct btrfs_root *root);
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int write_ctree_super(struct btrfs_trans_handle *trans,
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struct btrfs_root *root);
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int btrfs_read_dev_super(int fd, struct btrfs_super_block *sb, u64 sb_bytenr);
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int btrfs_map_bh_to_logical(struct btrfs_root *root, struct extent_buffer *bh,
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u64 logical);
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struct extent_buffer *btrfs_find_tree_block(struct btrfs_root *root,
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u64 bytenr, u32 blocksize);
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struct btrfs_root *btrfs_read_fs_root(struct btrfs_fs_info *fs_info,
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struct btrfs_key *location);
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struct btrfs_root *btrfs_read_fs_root_no_cache(struct btrfs_fs_info *fs_info,
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struct btrfs_key *location);
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int btrfs_free_fs_root(struct btrfs_fs_info *fs_info, struct btrfs_root *root);
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void btrfs_mark_buffer_dirty(struct extent_buffer *buf);
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int btrfs_buffer_uptodate(struct extent_buffer *buf, u64 parent_transid);
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int btrfs_set_buffer_uptodate(struct extent_buffer *buf);
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int wait_on_tree_block_writeback(struct btrfs_root *root,
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struct extent_buffer *buf);
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u32 btrfs_csum_data(struct btrfs_root *root, char *data, u32 seed, size_t len);
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void btrfs_csum_final(u32 crc, char *result);
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int btrfs_commit_transaction(struct btrfs_trans_handle *trans,
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struct btrfs_root *root);
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int btrfs_open_device(struct btrfs_device *dev);
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int csum_tree_block_size(struct extent_buffer *buf, u16 csum_sectorsize,
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int verify);
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int csum_tree_block(struct btrfs_root *root, struct extent_buffer *buf,
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int verify);
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int btrfs_read_buffer(struct extent_buffer *buf, u64 parent_transid);
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#endif
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/* raid6.c */
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void raid6_gen_syndrome(int disks, size_t bytes, void **ptrs);
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