1 /* 2 * Copyright (c) 2005-2006 Silicon Graphics, Inc. 3 * All Rights Reserved. 4 * 5 * This program is free software; you can redistribute it and/or 6 * modify it under the terms of the GNU General Public License as 7 * published by the Free Software Foundation. 8 * 9 * This program is distributed in the hope that it would be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 * GNU General Public License for more details. 13 * 14 * You should have received a copy of the GNU General Public License 15 * along with this program; if not, write the Free Software Foundation, 16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 17 */ 18 #ifndef __XFS_AOPS_H__ 19 #define __XFS_AOPS_H__ 20 21 extern struct bio_set *xfs_ioend_bioset; 22 23 /* 24 * Types of I/O for bmap clustering and I/O completion tracking. 25 */ 26 enum { 27 XFS_IO_INVALID, /* initial state */ 28 XFS_IO_DELALLOC, /* covers delalloc region */ 29 XFS_IO_UNWRITTEN, /* covers allocated but uninitialized data */ 30 XFS_IO_OVERWRITE, /* covers already allocated extent */ 31 XFS_IO_COW, /* covers copy-on-write extent */ 32 }; 33 34 #define XFS_IO_TYPES \ 35 { XFS_IO_INVALID, "invalid" }, \ 36 { XFS_IO_DELALLOC, "delalloc" }, \ 37 { XFS_IO_UNWRITTEN, "unwritten" }, \ 38 { XFS_IO_OVERWRITE, "overwrite" }, \ 39 { XFS_IO_COW, "CoW" } 40 41 /* 42 * Structure for buffered I/O completions. 43 */ 44 struct xfs_ioend { 45 struct list_head io_list; /* next ioend in chain */ 46 unsigned int io_type; /* delalloc / unwritten */ 47 struct inode *io_inode; /* file being written to */ 48 size_t io_size; /* size of the extent */ 49 xfs_off_t io_offset; /* offset in the file */ 50 struct work_struct io_work; /* xfsdatad work queue */ 51 struct xfs_trans *io_append_trans;/* xact. for size update */ 52 struct bio *io_bio; /* bio being built */ 53 struct bio io_inline_bio; /* MUST BE LAST! */ 54 }; 55 56 extern const struct address_space_operations xfs_address_space_operations; 57 58 int xfs_setfilesize(struct xfs_inode *ip, xfs_off_t offset, size_t size); 59 60 extern void xfs_count_page_state(struct page *, int *, int *); 61 extern struct block_device *xfs_find_bdev_for_inode(struct inode *); 62 63 #endif /* __XFS_AOPS_H__ */ 64