]>
Commit | Line | Data |
---|---|---|
6c98cd4e KS |
1 | /* |
2 | * sufile.h - NILFS segment usage file. | |
3 | * | |
4 | * Copyright (C) 2006-2008 Nippon Telegraph and Telephone Corporation. | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software | |
18 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
19 | * | |
20 | * Written by Koji Sato <koji@osrg.net>. | |
21 | */ | |
22 | ||
23 | #ifndef _NILFS_SUFILE_H | |
24 | #define _NILFS_SUFILE_H | |
25 | ||
26 | #include <linux/fs.h> | |
27 | #include <linux/buffer_head.h> | |
28 | #include <linux/nilfs2_fs.h> | |
29 | #include "mdt.h" | |
30 | ||
6c98cd4e KS |
31 | |
32 | static inline unsigned long nilfs_sufile_get_nsegments(struct inode *sufile) | |
33 | { | |
34 | return NILFS_MDT(sufile)->mi_nilfs->ns_nsegments; | |
35 | } | |
36 | ||
ef7d4757 RK |
37 | unsigned long nilfs_sufile_get_ncleansegs(struct inode *sufile); |
38 | ||
6c98cd4e | 39 | int nilfs_sufile_alloc(struct inode *, __u64 *); |
61a189e9 | 40 | int nilfs_sufile_mark_dirty(struct inode *sufile, __u64 segnum); |
071ec54d RK |
41 | int nilfs_sufile_set_segment_usage(struct inode *sufile, __u64 segnum, |
42 | unsigned long nblocks, time_t modtime); | |
6c98cd4e | 43 | int nilfs_sufile_get_stat(struct inode *, struct nilfs_sustat *); |
003ff182 | 44 | ssize_t nilfs_sufile_get_suinfo(struct inode *, __u64, void *, unsigned, |
6c98cd4e KS |
45 | size_t); |
46 | ||
dda54f4b RK |
47 | int nilfs_sufile_updatev(struct inode *, __u64 *, size_t, int, size_t *, |
48 | void (*dofunc)(struct inode *, __u64, | |
49 | struct buffer_head *, | |
50 | struct buffer_head *)); | |
a703018f RK |
51 | int nilfs_sufile_update(struct inode *, __u64, int, |
52 | void (*dofunc)(struct inode *, __u64, | |
53 | struct buffer_head *, | |
54 | struct buffer_head *)); | |
c85399c2 RK |
55 | void nilfs_sufile_do_scrap(struct inode *, __u64, struct buffer_head *, |
56 | struct buffer_head *); | |
a703018f RK |
57 | void nilfs_sufile_do_free(struct inode *, __u64, struct buffer_head *, |
58 | struct buffer_head *); | |
071cb4b8 RK |
59 | void nilfs_sufile_do_cancel_free(struct inode *, __u64, struct buffer_head *, |
60 | struct buffer_head *); | |
a703018f RK |
61 | void nilfs_sufile_do_set_error(struct inode *, __u64, struct buffer_head *, |
62 | struct buffer_head *); | |
63 | ||
8707df38 | 64 | int nilfs_sufile_read(struct inode *sufile, struct nilfs_inode *raw_inode); |
79739565 RK |
65 | struct inode *nilfs_sufile_new(struct the_nilfs *nilfs, size_t susize); |
66 | ||
c85399c2 RK |
67 | /** |
68 | * nilfs_sufile_scrap - make a segment garbage | |
69 | * @sufile: inode of segment usage file | |
70 | * @segnum: segment number to be freed | |
71 | */ | |
72 | static inline int nilfs_sufile_scrap(struct inode *sufile, __u64 segnum) | |
73 | { | |
74 | return nilfs_sufile_update(sufile, segnum, 1, nilfs_sufile_do_scrap); | |
75 | } | |
76 | ||
a703018f RK |
77 | /** |
78 | * nilfs_sufile_free - free segment | |
79 | * @sufile: inode of segment usage file | |
80 | * @segnum: segment number to be freed | |
81 | */ | |
82 | static inline int nilfs_sufile_free(struct inode *sufile, __u64 segnum) | |
83 | { | |
84 | return nilfs_sufile_update(sufile, segnum, 0, nilfs_sufile_do_free); | |
85 | } | |
86 | ||
071cb4b8 RK |
87 | /** |
88 | * nilfs_sufile_freev - free segments | |
89 | * @sufile: inode of segment usage file | |
90 | * @segnumv: array of segment numbers | |
91 | * @nsegs: size of @segnumv array | |
92 | * @ndone: place to store the number of freed segments | |
93 | */ | |
94 | static inline int nilfs_sufile_freev(struct inode *sufile, __u64 *segnumv, | |
95 | size_t nsegs, size_t *ndone) | |
96 | { | |
97 | return nilfs_sufile_updatev(sufile, segnumv, nsegs, 0, ndone, | |
98 | nilfs_sufile_do_free); | |
99 | } | |
100 | ||
101 | /** | |
102 | * nilfs_sufile_cancel_freev - reallocate freeing segments | |
103 | * @sufile: inode of segment usage file | |
104 | * @segnumv: array of segment numbers | |
105 | * @nsegs: size of @segnumv array | |
106 | * @ndone: place to store the number of cancelled segments | |
107 | * | |
108 | * Return Value: On success, 0 is returned. On error, a negative error codes | |
109 | * is returned. | |
110 | */ | |
111 | static inline int nilfs_sufile_cancel_freev(struct inode *sufile, | |
112 | __u64 *segnumv, size_t nsegs, | |
113 | size_t *ndone) | |
114 | { | |
115 | return nilfs_sufile_updatev(sufile, segnumv, nsegs, 0, ndone, | |
116 | nilfs_sufile_do_cancel_free); | |
117 | } | |
118 | ||
a703018f RK |
119 | /** |
120 | * nilfs_sufile_set_error - mark a segment as erroneous | |
121 | * @sufile: inode of segment usage file | |
122 | * @segnum: segment number | |
123 | * | |
124 | * Description: nilfs_sufile_set_error() marks the segment specified by | |
125 | * @segnum as erroneous. The error segment will never be used again. | |
126 | * | |
127 | * Return Value: On success, 0 is returned. On error, one of the following | |
128 | * negative error codes is returned. | |
129 | * | |
130 | * %-EIO - I/O error. | |
131 | * | |
132 | * %-ENOMEM - Insufficient amount of memory available. | |
133 | * | |
134 | * %-EINVAL - Invalid segment usage number. | |
135 | */ | |
136 | static inline int nilfs_sufile_set_error(struct inode *sufile, __u64 segnum) | |
137 | { | |
138 | return nilfs_sufile_update(sufile, segnum, 0, | |
139 | nilfs_sufile_do_set_error); | |
140 | } | |
6c98cd4e KS |
141 | |
142 | #endif /* _NILFS_SUFILE_H */ |