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bd45e9e3f6
When checksumming the encrypted bio on writes we need to know which logical address this checksum is for. At the point where we get the encrypted bio the bi_sector is the physical location on the target disk, so we need to save the original logical offset in the btrfs_bio. Then we can use this when checksumming the bio instead of the bio->iter.bi_sector. Note: The patch was taken from v5 of fscrypt patchset (https://lore.kernel.org/linux-btrfs/cover.1706116485.git.josef@toxicpanda.com/) which was handled over time by various people: Omar Sandoval, Sweet Tea Dorminy, Josef Bacik. Signed-off-by: Josef Bacik <josef@toxicpanda.com> Signed-off-by: Daniel Vacek <neelx@suse.com> Reviewed-by: David Sterba <dsterba@suse.com> [ add note ] Signed-off-by: David Sterba <dsterba@suse.com>
127 lines
3.4 KiB
C
127 lines
3.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright (C) 2007 Oracle. All rights reserved.
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* Copyright (C) 2022 Christoph Hellwig.
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*/
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#ifndef BTRFS_BIO_H
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#define BTRFS_BIO_H
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#include <linux/types.h>
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#include <linux/bio.h>
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#include <linux/workqueue.h>
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#include "tree-checker.h"
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struct btrfs_bio;
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struct btrfs_fs_info;
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struct btrfs_inode;
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#define BTRFS_BIO_INLINE_CSUM_SIZE 64
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typedef void (*btrfs_bio_end_io_t)(struct btrfs_bio *bbio);
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/*
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* Highlevel btrfs I/O structure. It is allocated by btrfs_bio_alloc and
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* passed to btrfs_submit_bbio() for mapping to the physical devices.
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*/
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struct btrfs_bio {
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/*
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* Inode and offset into it that this I/O operates on.
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*
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* If the inode is a data one, csum verification and read-repair
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* will be done automatically.
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* If the inode is a metadata one, everything is handled by the caller.
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*/
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struct btrfs_inode *inode;
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u64 file_offset;
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union {
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/*
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* For data reads: checksumming and original I/O information.
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* (for internal use in the btrfs_submit_bbio() machinery only)
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*/
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struct {
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u8 *csum;
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u8 csum_inline[BTRFS_BIO_INLINE_CSUM_SIZE];
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struct bvec_iter saved_iter;
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};
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/*
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* For data writes:
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* - ordered extent covering the bio
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* - pointer to the checksums for this bio
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* - original physical address from the allocator
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* (for zone append only)
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* - original logical address, used for checksumming fscrypt bios
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*/
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struct {
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struct btrfs_ordered_extent *ordered;
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struct btrfs_ordered_sum *sums;
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struct work_struct csum_work;
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struct completion csum_done;
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struct bvec_iter csum_saved_iter;
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u64 orig_physical;
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u64 orig_logical;
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};
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/* For metadata reads: parentness verification. */
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struct btrfs_tree_parent_check parent_check;
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};
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/* End I/O information supplied to btrfs_bio_alloc */
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btrfs_bio_end_io_t end_io;
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void *private;
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/* For internal use in read end I/O handling */
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unsigned int mirror_num;
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atomic_t pending_ios;
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struct work_struct end_io_work;
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/* Save the first error status of split bio. */
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blk_status_t status;
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/* Use the commit root to look up csums (data read bio only). */
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bool csum_search_commit_root;
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/*
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* Since scrub will reuse btree inode, we need this flag to distinguish
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* scrub bios.
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*/
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bool is_scrub;
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/* Whether the csum generation for data write is async. */
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bool async_csum;
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/*
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* This member must come last, bio_alloc_bioset will allocate enough
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* bytes for entire btrfs_bio but relies on bio being last.
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*/
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struct bio bio;
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};
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static inline struct btrfs_bio *btrfs_bio(struct bio *bio)
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{
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return container_of(bio, struct btrfs_bio, bio);
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}
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int __init btrfs_bioset_init(void);
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void __cold btrfs_bioset_exit(void);
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void btrfs_bio_init(struct btrfs_bio *bbio, struct btrfs_inode *inode, u64 file_offset,
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btrfs_bio_end_io_t end_io, void *private);
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struct btrfs_bio *btrfs_bio_alloc(unsigned int nr_vecs, blk_opf_t opf,
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struct btrfs_inode *inode, u64 file_offset,
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btrfs_bio_end_io_t end_io, void *private);
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void btrfs_bio_end_io(struct btrfs_bio *bbio, blk_status_t status);
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/* Submit using blkcg_punt_bio_submit. */
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#define REQ_BTRFS_CGROUP_PUNT REQ_FS_PRIVATE
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void btrfs_submit_bbio(struct btrfs_bio *bbio, int mirror_num);
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void btrfs_submit_repair_write(struct btrfs_bio *bbio, int mirror_num, bool dev_replace);
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int btrfs_repair_io_failure(struct btrfs_fs_info *fs_info, u64 ino, u64 fileoff,
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u32 length, u64 logical, const phys_addr_t paddrs[],
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unsigned int step, int mirror_num);
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#endif
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