2 * Copyright (c) 2000-2003 Silicon Graphics, Inc. All Rights Reserved.
4 * This program is free software; you can redistribute it and/or modify it
5 * under the terms of version 2 of the GNU General Public License as
6 * published by the Free Software Foundation.
8 * This program is distributed in the hope that it would be useful, but
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10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
12 * Further, this software is distributed without any warranty that it is
13 * free of the rightful claim of any third person regarding infringement
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15 * otherwise, applies only to this software file. Patent licenses, if
16 * any, provided herein do not apply to combinations of this program with
17 * other software, or any other product whatsoever.
19 * You should have received a copy of the GNU General Public License along
20 * with this program; if not, write the Free Software Foundation, Inc., 59
21 * Temple Place - Suite 330, Boston MA 02111-1307, USA.
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40 * Maximum count of bmaps used by read and write paths.
42 #define XFS_MAX_RW_NBMAPS 4
45 * Counts of readahead buffers to use based on physical memory size.
46 * None of these should be more than XFS_MAX_RW_NBMAPS.
48 #define XFS_RW_NREADAHEAD_16MB 2
49 #define XFS_RW_NREADAHEAD_32MB 3
50 #define XFS_RW_NREADAHEAD_K32 4
51 #define XFS_RW_NREADAHEAD_K64 4
54 * Maximum size of a buffer that we\'ll map. Making this
55 * too big will degrade performance due to the number of
56 * pages which need to be gathered. Making it too small
57 * will prevent us from doing large I/O\'s to hardware that
60 * This is currently set to 512 KB.
62 #define XFS_MAX_BMAP_LEN_BB 1024
63 #define XFS_MAX_BMAP_LEN_BYTES 524288
66 * Convert the given file system block to a disk block.
67 * We have to treat it differently based on whether the
68 * file is a real time file or not, because the bmap code
71 #if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_FSB_TO_DB)
72 xfs_daddr_t xfs_fsb_to_db(struct xfs_inode *ip, xfs_fsblock_t fsb);
73 #define XFS_FSB_TO_DB(ip,fsb) xfs_fsb_to_db(ip,fsb)
75 #define XFS_FSB_TO_DB(ip,fsb) \
76 (((ip)->i_d.di_flags & XFS_DIFLAG_REALTIME) ? \
77 (xfs_daddr_t)XFS_FSB_TO_BB((ip)->i_mount, (fsb)) : \
78 XFS_FSB_TO_DADDR((ip)->i_mount, (fsb)))
81 #define XFS_FSB_TO_DB_IO(io,fsb) \
82 (((io)->io_flags & XFS_IOCORE_RT) ? \
83 XFS_FSB_TO_BB((io)->io_mount, (fsb)) : \
84 XFS_FSB_TO_DADDR((io)->io_mount, (fsb)))
87 * Prototypes for functions in xfs_rw.c.
91 xfs_write_clear_setuid(
92 struct xfs_inode *ip);
109 struct xfs_mount *mp,
110 xfs_buftarg_t *target,
114 struct xfs_buf **bpp);
119 struct xfs_mount *mp,
125 * Prototypes for functions in xfs_vnodeops.c.
131 vrwlock_t write_lock);
136 vrwlock_t write_lock);
139 xfs_change_file_space(
154 #endif /* __XFS_RW_H__ */