fa60ce2cb4
The section "19) Editor modelines and other cruft" in Documentation/process/coding-style.rst clearly says, "Do not include any of these in source files." I recently receive a patch to explicitly add a new one. Let's do treewide cleanups, otherwise some people follow the existing code and attempt to upstream their favoriate editor setups. It is even nicer if scripts/checkpatch.pl can check it. If we like to impose coding style in an editor-independent manner, I think editorconfig (patch [1]) is a saner solution. [1] https://lore.kernel.org/lkml/20200703073143.423557-1-danny@kdrag0n.dev/ Link: https://lkml.kernel.org/r/20210324054457.1477489-1-masahiroy@kernel.org Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org> Reviewed-by: Miguel Ojeda <ojeda@kernel.org> [auxdisplay] Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
95 lines
3.2 KiB
C
95 lines
3.2 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* blockcheck.h
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*
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* Checksum and ECC codes for the OCFS2 userspace library.
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*
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* Copyright (C) 2004, 2008 Oracle. All rights reserved.
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*/
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#ifndef OCFS2_BLOCKCHECK_H
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#define OCFS2_BLOCKCHECK_H
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/* Count errors and error correction from blockcheck.c */
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struct ocfs2_blockcheck_stats {
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spinlock_t b_lock;
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u64 b_check_count; /* Number of blocks we've checked */
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u64 b_failure_count; /* Number of failed checksums */
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u64 b_recover_count; /* Number of blocks fixed by ecc */
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/*
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* debugfs entries, used if this is passed to
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* ocfs2_blockcheck_stats_debugfs_install()
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*/
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struct dentry *b_debug_dir; /* Parent of the debugfs files */
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};
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/* High level block API */
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void ocfs2_compute_meta_ecc(struct super_block *sb, void *data,
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struct ocfs2_block_check *bc);
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int ocfs2_validate_meta_ecc(struct super_block *sb, void *data,
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struct ocfs2_block_check *bc);
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void ocfs2_compute_meta_ecc_bhs(struct super_block *sb,
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struct buffer_head **bhs, int nr,
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struct ocfs2_block_check *bc);
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int ocfs2_validate_meta_ecc_bhs(struct super_block *sb,
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struct buffer_head **bhs, int nr,
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struct ocfs2_block_check *bc);
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/* Lower level API */
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void ocfs2_block_check_compute(void *data, size_t blocksize,
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struct ocfs2_block_check *bc);
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int ocfs2_block_check_validate(void *data, size_t blocksize,
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struct ocfs2_block_check *bc,
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struct ocfs2_blockcheck_stats *stats);
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void ocfs2_block_check_compute_bhs(struct buffer_head **bhs, int nr,
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struct ocfs2_block_check *bc);
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int ocfs2_block_check_validate_bhs(struct buffer_head **bhs, int nr,
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struct ocfs2_block_check *bc,
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struct ocfs2_blockcheck_stats *stats);
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/* Debug Initialization */
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void ocfs2_blockcheck_stats_debugfs_install(struct ocfs2_blockcheck_stats *stats,
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struct dentry *parent);
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void ocfs2_blockcheck_stats_debugfs_remove(struct ocfs2_blockcheck_stats *stats);
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/*
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* Hamming code functions
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*/
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/*
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* Encoding hamming code parity bits for a buffer.
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*
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* This is the low level encoder function. It can be called across
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* multiple hunks just like the crc32 code. 'd' is the number of bits
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* _in_this_hunk_. nr is the bit offset of this hunk. So, if you had
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* two 512B buffers, you would do it like so:
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*
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* parity = ocfs2_hamming_encode(0, buf1, 512 * 8, 0);
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* parity = ocfs2_hamming_encode(parity, buf2, 512 * 8, 512 * 8);
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*
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* If you just have one buffer, use ocfs2_hamming_encode_block().
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*/
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u32 ocfs2_hamming_encode(u32 parity, void *data, unsigned int d,
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unsigned int nr);
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/*
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* Fix a buffer with a bit error. The 'fix' is the original parity
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* xor'd with the parity calculated now.
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*
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* Like ocfs2_hamming_encode(), this can handle hunks. nr is the bit
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* offset of the current hunk. If bit to be fixed is not part of the
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* current hunk, this does nothing.
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*
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* If you only have one buffer, use ocfs2_hamming_fix_block().
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*/
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void ocfs2_hamming_fix(void *data, unsigned int d, unsigned int nr,
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unsigned int fix);
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/* Convenience wrappers for a single buffer of data */
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extern u32 ocfs2_hamming_encode_block(void *data, unsigned int blocksize);
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extern void ocfs2_hamming_fix_block(void *data, unsigned int blocksize,
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unsigned int fix);
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#endif
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