/* -*- mode: c; c-basic-offset: 8; -*- * vim: noexpandtab sw=8 ts=8 sts=0: * * Copyright (C) 2002, 2004, 2005 Oracle. All rights reserved. * * 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. */ #ifndef OCFS2_AOPS_H #define OCFS2_AOPS_H #include <linux/aio.h> handle_t *ocfs2_start_walk_page_trans(struct inode *inode, struct page *page, unsigned from, unsigned to); int ocfs2_map_page_blocks(struct page *page, u64 *p_blkno, struct inode *inode, unsigned int from, unsigned int to, int new); void ocfs2_unlock_and_free_pages(struct page **pages, int num_pages); int walk_page_buffers( handle_t *handle, struct buffer_head *head, unsigned from, unsigned to, int *partial, int (*fn)( handle_t *handle, struct buffer_head *bh)); int ocfs2_write_end_nolock(struct address_space *mapping, loff_t pos, unsigned len, unsigned copied, struct page *page, void *fsdata); int ocfs2_write_begin_nolock(struct file *filp, struct address_space *mapping, loff_t pos, unsigned len, unsigned flags, struct page **pagep, void **fsdata, struct buffer_head *di_bh, struct page *mmap_page); int ocfs2_read_inline_data(struct inode *inode, struct page *page, struct buffer_head *di_bh); int ocfs2_size_fits_inline_data(struct buffer_head *di_bh, u64 new_size); int ocfs2_get_block(struct inode *inode, sector_t iblock, struct buffer_head *bh_result, int create); /* all ocfs2_dio_end_io()'s fault */ #define ocfs2_iocb_is_rw_locked(iocb) \ test_bit(0, (unsigned long *)&iocb->private) static inline void ocfs2_iocb_set_rw_locked(struct kiocb *iocb, int level) { set_bit(0, (unsigned long *)&iocb->private); if (level) set_bit(1, (unsigned long *)&iocb->private); else clear_bit(1, (unsigned long *)&iocb->private); } /* * Using a named enum representing lock types in terms of #N bit stored in * iocb->private, which is going to be used for communication between * ocfs2_dio_end_io() and ocfs2_file_aio_write/read(). */ enum ocfs2_iocb_lock_bits { OCFS2_IOCB_RW_LOCK = 0, OCFS2_IOCB_RW_LOCK_LEVEL, OCFS2_IOCB_SEM, OCFS2_IOCB_UNALIGNED_IO, OCFS2_IOCB_NUM_LOCKS }; #define ocfs2_iocb_clear_rw_locked(iocb) \ clear_bit(OCFS2_IOCB_RW_LOCK, (unsigned long *)&iocb->private) #define ocfs2_iocb_rw_locked_level(iocb) \ test_bit(OCFS2_IOCB_RW_LOCK_LEVEL, (unsigned long *)&iocb->private) #define ocfs2_iocb_set_sem_locked(iocb) \ set_bit(OCFS2_IOCB_SEM, (unsigned long *)&iocb->private) #define ocfs2_iocb_clear_sem_locked(iocb) \ clear_bit(OCFS2_IOCB_SEM, (unsigned long *)&iocb->private) #define ocfs2_iocb_is_sem_locked(iocb) \ test_bit(OCFS2_IOCB_SEM, (unsigned long *)&iocb->private) #define ocfs2_iocb_set_unaligned_aio(iocb) \ set_bit(OCFS2_IOCB_UNALIGNED_IO, (unsigned long *)&iocb->private) #define ocfs2_iocb_clear_unaligned_aio(iocb) \ clear_bit(OCFS2_IOCB_UNALIGNED_IO, (unsigned long *)&iocb->private) #define ocfs2_iocb_is_unaligned_aio(iocb) \ test_bit(OCFS2_IOCB_UNALIGNED_IO, (unsigned long *)&iocb->private) #define OCFS2_IOEND_WQ_HASH_SZ 37 #define ocfs2_ioend_wq(v) (&ocfs2__ioend_wq[((unsigned long)(v)) %\ OCFS2_IOEND_WQ_HASH_SZ]) extern wait_queue_head_t ocfs2__ioend_wq[OCFS2_IOEND_WQ_HASH_SZ]; #endif /* OCFS2_FILE_H */