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63 lines
2.3 KiB
63 lines
2.3 KiB
/* |
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* Copyright (c) 2005-2006 Silicon Graphics, Inc. |
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* All Rights Reserved. |
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* |
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* This program is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU General Public License as |
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* published by the Free Software Foundation. |
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* |
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* This program is distributed in the hope that it would be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
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*/ |
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#ifndef __XFS_AOPS_H__ |
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#define __XFS_AOPS_H__ |
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extern mempool_t *xfs_ioend_pool; |
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/* |
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* Types of I/O for bmap clustering and I/O completion tracking. |
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*/ |
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enum { |
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XFS_IO_DIRECT = 0, /* special case for direct I/O ioends */ |
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XFS_IO_DELALLOC, /* covers delalloc region */ |
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XFS_IO_UNWRITTEN, /* covers allocated but uninitialized data */ |
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XFS_IO_OVERWRITE, /* covers already allocated extent */ |
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}; |
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#define XFS_IO_TYPES \ |
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{ 0, "" }, \ |
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{ XFS_IO_DELALLOC, "delalloc" }, \ |
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{ XFS_IO_UNWRITTEN, "unwritten" }, \ |
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{ XFS_IO_OVERWRITE, "overwrite" } |
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/* |
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* xfs_ioend struct manages large extent writes for XFS. |
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* It can manage several multi-page bio's at once. |
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*/ |
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typedef struct xfs_ioend { |
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struct xfs_ioend *io_list; /* next ioend in chain */ |
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unsigned int io_type; /* delalloc / unwritten */ |
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int io_error; /* I/O error code */ |
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atomic_t io_remaining; /* hold count */ |
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unsigned int io_isdirect : 1;/* direct I/O */ |
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struct inode *io_inode; /* file being written to */ |
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struct buffer_head *io_buffer_head;/* buffer linked list head */ |
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struct buffer_head *io_buffer_tail;/* buffer linked list tail */ |
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size_t io_size; /* size of the extent */ |
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xfs_off_t io_offset; /* offset in the file */ |
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struct work_struct io_work; /* xfsdatad work queue */ |
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struct xfs_trans *io_append_trans;/* xact. for size update */ |
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} xfs_ioend_t; |
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extern const struct address_space_operations xfs_address_space_operations; |
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extern int xfs_get_blocks(struct inode *, sector_t, struct buffer_head *, int); |
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extern void xfs_count_page_state(struct page *, int *, int *); |
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#endif /* __XFS_AOPS_H__ */
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