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1da177e4 LT |
1 | /* |
2 | * Copyright (c) 2000-2003 Silicon Graphics, Inc. All Rights Reserved. | |
3 | * | |
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. | |
7 | * | |
8 | * This program is distributed in the hope that it would be useful, but | |
9 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. | |
11 | * | |
12 | * Further, this software is distributed without any warranty that it is | |
13 | * free of the rightful claim of any third person regarding infringement | |
14 | * or the like. Any license provided herein, whether implied or | |
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. | |
18 | * | |
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. | |
22 | * | |
23 | * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy, | |
24 | * Mountain View, CA 94043, or: | |
25 | * | |
26 | * http://www.sgi.com | |
27 | * | |
28 | * For further information regarding this notice, see: | |
29 | * | |
30 | * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/ | |
31 | */ | |
32 | #ifndef __XFS_RW_H__ | |
33 | #define __XFS_RW_H__ | |
34 | ||
35 | struct xfs_buf; | |
36 | struct xfs_inode; | |
37 | struct xfs_mount; | |
38 | ||
39 | /* | |
40 | * Maximum count of bmaps used by read and write paths. | |
41 | */ | |
42 | #define XFS_MAX_RW_NBMAPS 4 | |
43 | ||
44 | /* | |
45 | * Counts of readahead buffers to use based on physical memory size. | |
46 | * None of these should be more than XFS_MAX_RW_NBMAPS. | |
47 | */ | |
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 | |
52 | ||
53 | /* | |
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 | |
58 | * needs it. | |
59 | * | |
60 | * This is currently set to 512 KB. | |
61 | */ | |
62 | #define XFS_MAX_BMAP_LEN_BB 1024 | |
63 | #define XFS_MAX_BMAP_LEN_BYTES 524288 | |
64 | ||
65 | /* | |
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 | |
69 | * does. | |
70 | */ | |
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) | |
74 | #else | |
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))) | |
79 | #endif | |
80 | ||
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))) | |
85 | ||
86 | /* | |
87 | * Prototypes for functions in xfs_rw.c. | |
88 | */ | |
89 | ||
90 | int | |
91 | xfs_write_clear_setuid( | |
92 | struct xfs_inode *ip); | |
93 | ||
94 | int | |
95 | xfs_bwrite( | |
96 | struct xfs_mount *mp, | |
97 | struct xfs_buf *bp); | |
98 | ||
99 | int | |
100 | xfs_bioerror( | |
101 | struct xfs_buf *b); | |
102 | ||
103 | int | |
104 | xfs_bioerror_relse( | |
105 | struct xfs_buf *b); | |
106 | ||
107 | int | |
108 | xfs_read_buf( | |
109 | struct xfs_mount *mp, | |
110 | xfs_buftarg_t *target, | |
111 | xfs_daddr_t blkno, | |
112 | int len, | |
113 | uint flags, | |
114 | struct xfs_buf **bpp); | |
115 | ||
116 | void | |
117 | xfs_ioerror_alert( | |
118 | char *func, | |
119 | struct xfs_mount *mp, | |
120 | xfs_buf_t *bp, | |
121 | xfs_daddr_t blkno); | |
122 | ||
123 | ||
124 | /* | |
125 | * Prototypes for functions in xfs_vnodeops.c. | |
126 | */ | |
127 | ||
128 | int | |
129 | xfs_rwlock( | |
130 | bhv_desc_t *bdp, | |
131 | vrwlock_t write_lock); | |
132 | ||
133 | void | |
134 | xfs_rwunlock( | |
135 | bhv_desc_t *bdp, | |
136 | vrwlock_t write_lock); | |
137 | ||
138 | int | |
139 | xfs_change_file_space( | |
140 | bhv_desc_t *bdp, | |
141 | int cmd, | |
142 | xfs_flock64_t *bf, | |
143 | xfs_off_t offset, | |
144 | cred_t *credp, | |
145 | int flags); | |
146 | ||
147 | int | |
148 | xfs_set_dmattrs( | |
149 | bhv_desc_t *bdp, | |
150 | u_int evmask, | |
151 | u_int16_t state, | |
152 | cred_t *credp); | |
153 | ||
154 | #endif /* __XFS_RW_H__ */ |