forked from luck/tmp_suning_uos_patched
328970de0e
Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version this program is distributed in the hope that it will be useful but without any warranty without even the implied warranty of merchantability or fitness for a particular purpose see the gnu general public license for more details you should have received a copy of the gnu general public license along with this program if not write to the free software foundation inc 59 temple place suite 330 boston ma 021110 1307 usa extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 84 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Richard Fontana <rfontana@redhat.com> Reviewed-by: Allison Randal <allison@lohutok.net> Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190524100844.756442981@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
61 lines
1.6 KiB
C
61 lines
1.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/* -*- mode: c; c-basic-offset: 8; -*-
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* vim: noexpandtab sw=8 ts=8 sts=0:
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*
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* ocfs2_buffer_head.h
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*
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* Buffer cache handling functions defined
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*
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* Copyright (C) 2002, 2004 Oracle. All rights reserved.
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*/
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#ifndef OCFS2_BUFFER_HEAD_IO_H
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#define OCFS2_BUFFER_HEAD_IO_H
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#include <linux/buffer_head.h>
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int ocfs2_write_block(struct ocfs2_super *osb,
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struct buffer_head *bh,
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struct ocfs2_caching_info *ci);
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int ocfs2_read_blocks_sync(struct ocfs2_super *osb, u64 block,
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unsigned int nr, struct buffer_head *bhs[]);
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/*
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* If not NULL, validate() will be called on a buffer that is freshly
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* read from disk. It will not be called if the buffer was in cache.
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* Note that if validate() is being used for this buffer, it needs to
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* be set even for a READAHEAD call, as it marks the buffer for later
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* validation.
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*/
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int ocfs2_read_blocks(struct ocfs2_caching_info *ci, u64 block, int nr,
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struct buffer_head *bhs[], int flags,
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int (*validate)(struct super_block *sb,
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struct buffer_head *bh));
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int ocfs2_write_super_or_backup(struct ocfs2_super *osb,
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struct buffer_head *bh);
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#define OCFS2_BH_IGNORE_CACHE 1
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#define OCFS2_BH_READAHEAD 8
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static inline int ocfs2_read_block(struct ocfs2_caching_info *ci, u64 off,
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struct buffer_head **bh,
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int (*validate)(struct super_block *sb,
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struct buffer_head *bh))
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{
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int status = 0;
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if (bh == NULL) {
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printk("ocfs2: bh == NULL\n");
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status = -EINVAL;
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goto bail;
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}
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status = ocfs2_read_blocks(ci, off, 1, bh, 0, validate);
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bail:
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return status;
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}
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#endif /* OCFS2_BUFFER_HEAD_IO_H */
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