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1da177e4 | 1 | /* |
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2 | * Copyright (c) 2000-2003,2005 Silicon Graphics, Inc. |
3 | * All Rights Reserved. | |
1da177e4 | 4 | * |
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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 | |
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7 | * published by the Free Software Foundation. |
8 | * | |
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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. | |
1da177e4 | 13 | * |
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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 | |
1da177e4 LT |
17 | */ |
18 | #ifndef __XFS_RW_H__ | |
19 | #define __XFS_RW_H__ | |
20 | ||
21 | struct xfs_buf; | |
22 | struct xfs_inode; | |
23 | struct xfs_mount; | |
24 | ||
25 | /* | |
26 | * Maximum count of bmaps used by read and write paths. | |
27 | */ | |
28 | #define XFS_MAX_RW_NBMAPS 4 | |
29 | ||
30 | /* | |
31 | * Counts of readahead buffers to use based on physical memory size. | |
32 | * None of these should be more than XFS_MAX_RW_NBMAPS. | |
33 | */ | |
34 | #define XFS_RW_NREADAHEAD_16MB 2 | |
35 | #define XFS_RW_NREADAHEAD_32MB 3 | |
36 | #define XFS_RW_NREADAHEAD_K32 4 | |
37 | #define XFS_RW_NREADAHEAD_K64 4 | |
38 | ||
39 | /* | |
40 | * Maximum size of a buffer that we\'ll map. Making this | |
41 | * too big will degrade performance due to the number of | |
42 | * pages which need to be gathered. Making it too small | |
43 | * will prevent us from doing large I/O\'s to hardware that | |
44 | * needs it. | |
45 | * | |
46 | * This is currently set to 512 KB. | |
47 | */ | |
48 | #define XFS_MAX_BMAP_LEN_BB 1024 | |
49 | #define XFS_MAX_BMAP_LEN_BYTES 524288 | |
50 | ||
51 | /* | |
52 | * Convert the given file system block to a disk block. | |
53 | * We have to treat it differently based on whether the | |
54 | * file is a real time file or not, because the bmap code | |
55 | * does. | |
56 | */ | |
1da177e4 | 57 | #define XFS_FSB_TO_DB(ip,fsb) xfs_fsb_to_db(ip,fsb) |
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58 | static inline xfs_daddr_t |
59 | xfs_fsb_to_db(struct xfs_inode *ip, xfs_fsblock_t fsb) | |
60 | { | |
61 | return (((ip)->i_d.di_flags & XFS_DIFLAG_REALTIME) ? \ | |
1da177e4 | 62 | (xfs_daddr_t)XFS_FSB_TO_BB((ip)->i_mount, (fsb)) : \ |
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63 | XFS_FSB_TO_DADDR((ip)->i_mount, (fsb))); |
64 | } | |
65 | #define XFS_FSB_TO_DB_IO(io,fsb) xfs_fsb_to_db_io(io,fsb) | |
66 | static inline xfs_daddr_t | |
67 | xfs_fsb_to_db_io(struct xfs_iocore *io, xfs_fsblock_t fsb) | |
68 | { | |
69 | return (((io)->io_flags & XFS_IOCORE_RT) ? \ | |
1da177e4 | 70 | XFS_FSB_TO_BB((io)->io_mount, (fsb)) : \ |
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71 | XFS_FSB_TO_DADDR((io)->io_mount, (fsb))); |
72 | } | |
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73 | |
74 | /* | |
75 | * Prototypes for functions in xfs_rw.c. | |
76 | */ | |
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77 | extern int xfs_write_clear_setuid(struct xfs_inode *ip); |
78 | extern int xfs_bwrite(struct xfs_mount *mp, struct xfs_buf *bp); | |
79 | extern int xfs_bioerror(struct xfs_buf *bp); | |
80 | extern int xfs_bioerror_relse(struct xfs_buf *bp); | |
81 | extern int xfs_read_buf(struct xfs_mount *mp, xfs_buftarg_t *btp, | |
82 | xfs_daddr_t blkno, int len, uint flags, | |
83 | struct xfs_buf **bpp); | |
84 | extern void xfs_ioerror_alert(char *func, struct xfs_mount *mp, | |
85 | xfs_buf_t *bp, xfs_daddr_t blkno); | |
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86 | |
87 | /* | |
88 | * Prototypes for functions in xfs_vnodeops.c. | |
89 | */ | |
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90 | extern int xfs_rwlock(bhv_desc_t *bdp, vrwlock_t write_lock); |
91 | extern void xfs_rwunlock(bhv_desc_t *bdp, vrwlock_t write_lock); | |
bb19fba1 | 92 | extern int xfs_setattr(bhv_desc_t *bdp, vattr_t *vap, int flags, cred_t *credp); |
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93 | extern int xfs_change_file_space(bhv_desc_t *bdp, int cmd, xfs_flock64_t *bf, |
94 | xfs_off_t offset, cred_t *credp, int flags); | |
95 | extern int xfs_set_dmattrs(bhv_desc_t *bdp, u_int evmask, u_int16_t state, | |
96 | cred_t *credp); | |
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97 | |
98 | #endif /* __XFS_RW_H__ */ |