mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-11-11 23:47:24 +00:00
e3427184f3
This version of btrfs_file_read() has the following new features: - Tries all mirrors - More handling on unaligned size - Better compressed extent handling The old implementation doesn't handle compressed extent with offset properly: we need to read out the whole compressed extent, then decompress the whole extent, and only then copy the requested part. Signed-off-by: Qu Wenruo <wqu@suse.com> Reviewed-by: Marek Behún <marek.behun@nic.cz>
75 lines
2.2 KiB
C
75 lines
2.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0+ */
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/*
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* BTRFS filesystem implementation for U-Boot
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*
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* 2017 Marek Behun, CZ.NIC, marek.behun@nic.cz
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*/
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#ifndef __BTRFS_BTRFS_H__
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#define __BTRFS_BTRFS_H__
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#include <linux/rbtree.h>
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#include "conv-funcs.h"
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struct btrfs_info {
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struct btrfs_super_block sb;
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struct __btrfs_root tree_root;
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struct __btrfs_root fs_root;
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struct __btrfs_root chunk_root;
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struct rb_root chunks_root;
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};
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extern struct btrfs_info btrfs_info;
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extern struct btrfs_fs_info *current_fs_info;
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/* dev.c */
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extern struct blk_desc *btrfs_blk_desc;
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extern struct disk_partition *btrfs_part_info;
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int btrfs_devread(u64, int, void *);
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/* chunk-map.c */
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u64 btrfs_map_logical_to_physical(u64);
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int btrfs_chunk_map_init(void);
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void btrfs_chunk_map_exit(void);
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int __btrfs_read_chunk_tree(void);
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/* compression.c */
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u32 btrfs_decompress(u8 type, const char *, u32, char *, u32);
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/* super.c */
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int btrfs_read_superblock(void);
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/* dir-item.c */
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int __btrfs_lookup_dir_item(const struct __btrfs_root *, u64, const char *, int,
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struct btrfs_dir_item *);
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/* root.c */
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int btrfs_find_root(u64, struct __btrfs_root *, struct btrfs_root_item *);
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u64 btrfs_lookup_root_ref(u64, struct btrfs_root_ref *, char *);
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/* inode.c */
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u64 __btrfs_lookup_inode_ref(struct __btrfs_root *, u64, struct btrfs_inode_ref *,
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char *);
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int __btrfs_lookup_inode(const struct __btrfs_root *, struct btrfs_key *,
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struct btrfs_inode_item *, struct __btrfs_root *);
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int __btrfs_readlink(const struct __btrfs_root *, u64, char *);
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int btrfs_readlink(struct btrfs_root *root, u64 ino, char *target);
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u64 __btrfs_lookup_path(struct __btrfs_root *, u64, const char *, u8 *,
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struct btrfs_inode_item *, int);
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u64 __btrfs_file_read(const struct __btrfs_root *, u64, u64, u64, char *);
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int btrfs_file_read(struct btrfs_root *root, u64 ino, u64 file_offset, u64 len,
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char *dest);
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/* subvolume.c */
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u64 btrfs_get_default_subvol_objectid(void);
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/* extent-io.c */
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u64 __btrfs_read_extent_inline(struct __btrfs_path *,
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struct btrfs_file_extent_item *, u64, u64,
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char *);
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u64 __btrfs_read_extent_reg(struct __btrfs_path *, struct btrfs_file_extent_item *,
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u64, u64, char *);
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#endif /* !__BTRFS_BTRFS_H__ */
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