1 /* -*- mode: c; c-basic-offset: 8; -*- 2 * vim: noexpandtab sw=8 ts=8 sts=0: 3 * 4 * Copyright (C) 2002, 2004, 2005 Oracle. All rights reserved. 5 * 6 * This program is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU General Public 8 * License as published by the Free Software Foundation; either 9 * version 2 of the License, or (at your option) any later version. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 14 * General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public 17 * License along with this program; if not, write to the 18 * Free Software Foundation, Inc., 59 Temple Place - Suite 330, 19 * Boston, MA 021110-1307, USA. 20 */ 21 22 #ifndef OCFS2_AOPS_H 23 #define OCFS2_AOPS_H 24 25 handle_t *ocfs2_start_walk_page_trans(struct inode *inode, 26 struct page *page, 27 unsigned from, 28 unsigned to); 29 30 int ocfs2_map_page_blocks(struct page *page, u64 *p_blkno, 31 struct inode *inode, unsigned int from, 32 unsigned int to, int new); 33 34 void ocfs2_unlock_and_free_pages(struct page **pages, int num_pages); 35 36 int walk_page_buffers( handle_t *handle, 37 struct buffer_head *head, 38 unsigned from, 39 unsigned to, 40 int *partial, 41 int (*fn)( handle_t *handle, 42 struct buffer_head *bh)); 43 44 int ocfs2_write_end_nolock(struct address_space *mapping, 45 loff_t pos, unsigned len, unsigned copied, 46 struct page *page, void *fsdata); 47 48 int ocfs2_write_begin_nolock(struct file *filp, 49 struct address_space *mapping, 50 loff_t pos, unsigned len, unsigned flags, 51 struct page **pagep, void **fsdata, 52 struct buffer_head *di_bh, struct page *mmap_page); 53 54 int ocfs2_read_inline_data(struct inode *inode, struct page *page, 55 struct buffer_head *di_bh); 56 int ocfs2_size_fits_inline_data(struct buffer_head *di_bh, u64 new_size); 57 58 int ocfs2_get_block(struct inode *inode, sector_t iblock, 59 struct buffer_head *bh_result, int create); 60 /* all ocfs2_dio_end_io()'s fault */ 61 #define ocfs2_iocb_is_rw_locked(iocb) \ 62 test_bit(0, (unsigned long *)&iocb->private) 63 static inline void ocfs2_iocb_set_rw_locked(struct kiocb *iocb, int level) 64 { 65 set_bit(0, (unsigned long *)&iocb->private); 66 if (level) 67 set_bit(1, (unsigned long *)&iocb->private); 68 else 69 clear_bit(1, (unsigned long *)&iocb->private); 70 } 71 72 /* 73 * Using a named enum representing lock types in terms of #N bit stored in 74 * iocb->private, which is going to be used for communication between 75 * ocfs2_dio_end_io() and ocfs2_file_aio_write/read(). 76 */ 77 enum ocfs2_iocb_lock_bits { 78 OCFS2_IOCB_RW_LOCK = 0, 79 OCFS2_IOCB_RW_LOCK_LEVEL, 80 OCFS2_IOCB_SEM, 81 OCFS2_IOCB_UNALIGNED_IO, 82 OCFS2_IOCB_NUM_LOCKS 83 }; 84 85 #define ocfs2_iocb_clear_rw_locked(iocb) \ 86 clear_bit(OCFS2_IOCB_RW_LOCK, (unsigned long *)&iocb->private) 87 #define ocfs2_iocb_rw_locked_level(iocb) \ 88 test_bit(OCFS2_IOCB_RW_LOCK_LEVEL, (unsigned long *)&iocb->private) 89 #define ocfs2_iocb_set_sem_locked(iocb) \ 90 set_bit(OCFS2_IOCB_SEM, (unsigned long *)&iocb->private) 91 #define ocfs2_iocb_clear_sem_locked(iocb) \ 92 clear_bit(OCFS2_IOCB_SEM, (unsigned long *)&iocb->private) 93 #define ocfs2_iocb_is_sem_locked(iocb) \ 94 test_bit(OCFS2_IOCB_SEM, (unsigned long *)&iocb->private) 95 96 #define ocfs2_iocb_set_unaligned_aio(iocb) \ 97 set_bit(OCFS2_IOCB_UNALIGNED_IO, (unsigned long *)&iocb->private) 98 #define ocfs2_iocb_clear_unaligned_aio(iocb) \ 99 clear_bit(OCFS2_IOCB_UNALIGNED_IO, (unsigned long *)&iocb->private) 100 #define ocfs2_iocb_is_unaligned_aio(iocb) \ 101 test_bit(OCFS2_IOCB_UNALIGNED_IO, (unsigned long *)&iocb->private) 102 103 #define OCFS2_IOEND_WQ_HASH_SZ 37 104 #define ocfs2_ioend_wq(v) (&ocfs2__ioend_wq[((unsigned long)(v)) %\ 105 OCFS2_IOEND_WQ_HASH_SZ]) 106 extern wait_queue_head_t ocfs2__ioend_wq[OCFS2_IOEND_WQ_HASH_SZ]; 107 108 #endif /* OCFS2_FILE_H */ 109