fs/ocfs2/aops.h

   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 int ocfs2_prepare_write_nolock(struct inode *inode, struct page *page,
  26                                unsigned from, unsigned to);
  27
  28 handle_t *ocfs2_start_walk_page_trans(struct inode *inode,
  29                                                          struct page *page,
  30                                                          unsigned from,
  31                                                          unsigned to);
  32
  33 int ocfs2_map_page_blocks(struct page *page, u64 *p_blkno,
  34                           struct inode *inode, unsigned int from,
  35                           unsigned int to, int new);
  36
  37 void ocfs2_unlock_and_free_pages(struct page **pages, int num_pages);
  38
  39 int walk_page_buffers(  handle_t *handle,
  40                         struct buffer_head *head,
  41                         unsigned from,
  42                         unsigned to,
  43                         int *partial,
  44                         int (*fn)(      handle_t *handle,
  45                                         struct buffer_head *bh));
  46
  47 int ocfs2_write_begin(struct file *file, struct address_space *mapping,
  48                       loff_t pos, unsigned len, unsigned flags,
  49                       struct page **pagep, void **fsdata);
  50
  51 int ocfs2_write_end(struct file *file, struct address_space *mapping,
  52                     loff_t pos, unsigned len, unsigned copied,
  53                     struct page *page, void *fsdata);
  54
  55 int ocfs2_write_end_nolock(struct address_space *mapping,
  56                            loff_t pos, unsigned len, unsigned copied,
  57                            struct page *page, void *fsdata);
  58
  59 int ocfs2_write_begin_nolock(struct address_space *mapping,
  60                              loff_t pos, unsigned len, unsigned flags,
  61                              struct page **pagep, void **fsdata,
  62                              struct buffer_head *di_bh, struct page *mmap_page);
  63
  64 /* all ocfs2_dio_end_io()'s fault */
  65 #define ocfs2_iocb_is_rw_locked(iocb) \
  66         test_bit(0, (unsigned long *)&iocb->private)
  67 static inline void ocfs2_iocb_set_rw_locked(struct kiocb *iocb, int level)
  68 {
  69         set_bit(0, (unsigned long *)&iocb->private);
  70         if (level)
  71                 set_bit(1, (unsigned long *)&iocb->private);
  72         else
  73                 clear_bit(1, (unsigned long *)&iocb->private);
  74 }
  75 #define ocfs2_iocb_clear_rw_locked(iocb) \
  76         clear_bit(0, (unsigned long *)&iocb->private)
  77 #define ocfs2_iocb_rw_locked_level(iocb) \
  78         test_bit(1, (unsigned long *)&iocb->private)
  79 #endif /* OCFS2_FILE_H */