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 #include <linux/aio.h> 26 27 handle_t *ocfs2_start_walk_page_trans(struct inode *inode, 28 struct page *page, 29 unsigned from, 30 unsigned to); 31 32 int ocfs2_map_page_blocks(struct page *page, u64 *p_blkno, 33 struct inode *inode, unsigned int from, 34 unsigned int to, int new); 35 36 void ocfs2_unlock_and_free_pages(struct page **pages, int num_pages); 37 38 int walk_page_buffers( handle_t *handle, 39 struct buffer_head *head, 40 unsigned from, 41 unsigned to, 42 int *partial, 43 int (*fn)( handle_t *handle, 44 struct buffer_head *bh)); 45 46 int ocfs2_write_end_nolock(struct address_space *mapping, 47 loff_t pos, unsigned len, unsigned copied, 48 struct page *page, void *fsdata); 49 50 int ocfs2_write_begin_nolock(struct file *filp, 51 struct address_space *mapping, 52 loff_t pos, unsigned len, unsigned flags, 53 struct page **pagep, void **fsdata, 54 struct buffer_head *di_bh, struct page *mmap_page); 55 56 int ocfs2_read_inline_data(struct inode *inode, struct page *page, 57 struct buffer_head *di_bh); 58 int ocfs2_size_fits_inline_data(struct buffer_head *di_bh, u64 new_size); 59 60 int ocfs2_get_block(struct inode *inode, sector_t iblock, 61 struct buffer_head *bh_result, int create); 62 /* all ocfs2_dio_end_io()'s fault */ 63 #define ocfs2_iocb_is_rw_locked(iocb) \ 64 test_bit(0, (unsigned long *)&iocb->private) 65 static inline void ocfs2_iocb_set_rw_locked(struct kiocb *iocb, int level) 66 { 67 set_bit(0, (unsigned long *)&iocb->private); 68 if (level) 69 set_bit(1, (unsigned long *)&iocb->private); 70 else 71 clear_bit(1, (unsigned long *)&iocb->private); 72 } 73 74 /* 75 * Using a named enum representing lock types in terms of #N bit stored in 76 * iocb->private, which is going to be used for communication between 77 * ocfs2_dio_end_io() and ocfs2_file_aio_write/read(). 78 */ 79 enum ocfs2_iocb_lock_bits { 80 OCFS2_IOCB_RW_LOCK = 0, 81 OCFS2_IOCB_RW_LOCK_LEVEL, 82 OCFS2_IOCB_SEM, 83 OCFS2_IOCB_UNALIGNED_IO, 84 OCFS2_IOCB_NUM_LOCKS 85 }; 86 87 #define ocfs2_iocb_clear_rw_locked(iocb) \ 88 clear_bit(OCFS2_IOCB_RW_LOCK, (unsigned long *)&iocb->private) 89 #define ocfs2_iocb_rw_locked_level(iocb) \ 90 test_bit(OCFS2_IOCB_RW_LOCK_LEVEL, (unsigned long *)&iocb->private) 91 #define ocfs2_iocb_set_sem_locked(iocb) \ 92 set_bit(OCFS2_IOCB_SEM, (unsigned long *)&iocb->private) 93 #define ocfs2_iocb_clear_sem_locked(iocb) \ 94 clear_bit(OCFS2_IOCB_SEM, (unsigned long *)&iocb->private) 95 #define ocfs2_iocb_is_sem_locked(iocb) \ 96 test_bit(OCFS2_IOCB_SEM, (unsigned long *)&iocb->private) 97 98 #define ocfs2_iocb_set_unaligned_aio(iocb) \ 99 set_bit(OCFS2_IOCB_UNALIGNED_IO, (unsigned long *)&iocb->private) 100 #define ocfs2_iocb_clear_unaligned_aio(iocb) \ 101 clear_bit(OCFS2_IOCB_UNALIGNED_IO, (unsigned long *)&iocb->private) 102 #define ocfs2_iocb_is_unaligned_aio(iocb) \ 103 test_bit(OCFS2_IOCB_UNALIGNED_IO, (unsigned long *)&iocb->private) 104 105 #define OCFS2_IOEND_WQ_HASH_SZ 37 106 #define ocfs2_ioend_wq(v) (&ocfs2__ioend_wq[((unsigned long)(v)) %\ 107 OCFS2_IOEND_WQ_HASH_SZ]) 108 extern wait_queue_head_t ocfs2__ioend_wq[OCFS2_IOEND_WQ_HASH_SZ]; 109 110 #endif /* OCFS2_FILE_H */ 111