Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) /* SPDX-License-Identifier: GPL-2.0-or-later */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) /* -*- mode: c; c-basic-offset: 8; -*-
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3)  * vim: noexpandtab sw=8 ts=8 sts=0:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5)  * ocfs2_buffer_head.h
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7)  * Buffer cache handling functions defined
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9)  * Copyright (C) 2002, 2004 Oracle.  All rights reserved.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #ifndef OCFS2_BUFFER_HEAD_IO_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #define OCFS2_BUFFER_HEAD_IO_H
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/buffer_head.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) int ocfs2_write_block(struct ocfs2_super          *osb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) 		      struct buffer_head  *bh,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) 		      struct ocfs2_caching_info   *ci);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) int ocfs2_read_blocks_sync(struct ocfs2_super *osb, u64 block,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) 			   unsigned int nr, struct buffer_head *bhs[]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24)  * If not NULL, validate() will be called on a buffer that is freshly
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25)  * read from disk.  It will not be called if the buffer was in cache.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26)  * Note that if validate() is being used for this buffer, it needs to
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27)  * be set even for a READAHEAD call, as it marks the buffer for later
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28)  * validation.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) int ocfs2_read_blocks(struct ocfs2_caching_info *ci, u64 block, int nr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) 		      struct buffer_head *bhs[], int flags,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) 		      int (*validate)(struct super_block *sb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) 				      struct buffer_head *bh));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) int ocfs2_write_super_or_backup(struct ocfs2_super *osb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) 				struct buffer_head *bh);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) #define OCFS2_BH_IGNORE_CACHE      1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) #define OCFS2_BH_READAHEAD         8
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) static inline int ocfs2_read_block(struct ocfs2_caching_info *ci, u64 off,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) 				   struct buffer_head **bh,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) 				   int (*validate)(struct super_block *sb,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) 						   struct buffer_head *bh))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) 	int status = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) 	if (bh == NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) 		printk("ocfs2: bh == NULL\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) 		status = -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) 		goto bail;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) 	status = ocfs2_read_blocks(ci, off, 1, bh, 0, validate);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) bail:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) 	return status;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) #endif /* OCFS2_BUFFER_HEAD_IO_H */