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- /*
- * Copyright (c) 2005-2006 Silicon Graphics, Inc.
- * 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.
- *
- * This program is distributed in the hope that it would 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 the Free Software Foundation,
- * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- */
- #ifndef __XFS_AOPS_H__
- #define __XFS_AOPS_H__
- extern mempool_t *xfs_ioend_pool;
- /*
- * Types of I/O for bmap clustering and I/O completion tracking.
- */
- enum {
- IO_DIRECT = 0, /* special case for direct I/O ioends */
- IO_DELALLOC, /* mapping covers delalloc region */
- IO_UNWRITTEN, /* mapping covers allocated but uninitialized data */
- IO_OVERWRITE, /* mapping covers already allocated extent */
- };
- #define XFS_IO_TYPES \
- { 0, "" }, \
- { IO_DELALLOC, "delalloc" }, \
- { IO_UNWRITTEN, "unwritten" }, \
- { IO_OVERWRITE, "overwrite" }
- /*
- * xfs_ioend struct manages large extent writes for XFS.
- * It can manage several multi-page bio's at once.
- */
- typedef struct xfs_ioend {
- struct xfs_ioend *io_list; /* next ioend in chain */
- unsigned int io_type; /* delalloc / unwritten */
- int io_error; /* I/O error code */
- atomic_t io_remaining; /* hold count */
- unsigned int io_isasync : 1; /* needs aio_complete */
- unsigned int io_isdirect : 1;/* direct I/O */
- struct inode *io_inode; /* file being written to */
- struct buffer_head *io_buffer_head;/* buffer linked list head */
- struct buffer_head *io_buffer_tail;/* buffer linked list tail */
- size_t io_size; /* size of the extent */
- xfs_off_t io_offset; /* offset in the file */
- struct work_struct io_work; /* xfsdatad work queue */
- struct xfs_trans *io_append_trans;/* xact. for size update */
- struct kiocb *io_iocb;
- int io_result;
- } xfs_ioend_t;
- extern const struct address_space_operations xfs_address_space_operations;
- extern int xfs_get_blocks(struct inode *, sector_t, struct buffer_head *, int);
- extern void xfs_count_page_state(struct page *, int *, int *);
- #endif /* __XFS_AOPS_H__ */
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