1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 /* -*- mode: c; c-basic-offset: 8; -*- 3 * vim: noexpandtab sw=8 ts=8 sts=0: 4 * 5 * Copyright (C) 2002, 2004, 2005 Oracle. All rights reserved. 6 */ 7 8 #ifndef OCFS2_AOPS_H 9 #define OCFS2_AOPS_H 10 11 #include <linux/fs.h> 12 13 handle_t *ocfs2_start_walk_page_trans(struct inode *inode, 14 struct page *page, 15 unsigned from, 16 unsigned to); 17 18 int ocfs2_map_page_blocks(struct page *page, u64 *p_blkno, 19 struct inode *inode, unsigned int from, 20 unsigned int to, int new); 21 22 void ocfs2_unlock_and_free_pages(struct page **pages, int num_pages); 23 24 int walk_page_buffers( handle_t *handle, 25 struct buffer_head *head, 26 unsigned from, 27 unsigned to, 28 int *partial, 29 int (*fn)( handle_t *handle, 30 struct buffer_head *bh)); 31 32 int ocfs2_write_end_nolock(struct address_space *mapping, 33 loff_t pos, unsigned len, unsigned copied, void *fsdata); 34 35 typedef enum { 36 OCFS2_WRITE_BUFFER = 0, 37 OCFS2_WRITE_DIRECT, 38 OCFS2_WRITE_MMAP, 39 } ocfs2_write_type_t; 40 41 int ocfs2_write_begin_nolock(struct address_space *mapping, 42 loff_t pos, unsigned len, ocfs2_write_type_t type, 43 struct page **pagep, void **fsdata, 44 struct buffer_head *di_bh, struct page *mmap_page); 45 46 int ocfs2_read_inline_data(struct inode *inode, struct page *page, 47 struct buffer_head *di_bh); 48 int ocfs2_size_fits_inline_data(struct buffer_head *di_bh, u64 new_size); 49 50 int ocfs2_get_block(struct inode *inode, sector_t iblock, 51 struct buffer_head *bh_result, int create); 52 /* all ocfs2_dio_end_io()'s fault */ 53 #define ocfs2_iocb_is_rw_locked(iocb) \ 54 test_bit(0, (unsigned long *)&iocb->private) 55 static inline void ocfs2_iocb_set_rw_locked(struct kiocb *iocb, int level) 56 { 57 set_bit(0, (unsigned long *)&iocb->private); 58 if (level) 59 set_bit(1, (unsigned long *)&iocb->private); 60 else 61 clear_bit(1, (unsigned long *)&iocb->private); 62 } 63 64 /* 65 * Using a named enum representing lock types in terms of #N bit stored in 66 * iocb->private, which is going to be used for communication between 67 * ocfs2_dio_end_io() and ocfs2_file_write/read_iter(). 68 */ 69 enum ocfs2_iocb_lock_bits { 70 OCFS2_IOCB_RW_LOCK = 0, 71 OCFS2_IOCB_RW_LOCK_LEVEL, 72 OCFS2_IOCB_NUM_LOCKS 73 }; 74 75 #define ocfs2_iocb_clear_rw_locked(iocb) \ 76 clear_bit(OCFS2_IOCB_RW_LOCK, (unsigned long *)&iocb->private) 77 #define ocfs2_iocb_rw_locked_level(iocb) \ 78 test_bit(OCFS2_IOCB_RW_LOCK_LEVEL, (unsigned long *)&iocb->private) 79 80 #endif /* OCFS2_FILE_H */ 81