1 /* SPDX-License-Identifier: GPL-2.0+ */
2 /*
3 * NILFS segment usage file.
4 *
5 * Copyright (C) 2006-2008 Nippon Telegraph and Telephone Corporation.
6 *
7 * Written by Koji Sato.
8 */
9
10 #ifndef _NILFS_SUFILE_H
11 #define _NILFS_SUFILE_H
12
13 #include <linux/fs.h>
14 #include <linux/buffer_head.h>
15 #include "mdt.h"
16
17
nilfs_sufile_get_nsegments(struct inode * sufile)18 static inline unsigned long nilfs_sufile_get_nsegments(struct inode *sufile)
19 {
20 return ((struct the_nilfs *)sufile->i_sb->s_fs_info)->ns_nsegments;
21 }
22
23 unsigned long nilfs_sufile_get_ncleansegs(struct inode *sufile);
24
25 int nilfs_sufile_set_alloc_range(struct inode *sufile, __u64 start, __u64 end);
26 int nilfs_sufile_alloc(struct inode *, __u64 *);
27 int nilfs_sufile_mark_dirty(struct inode *sufile, __u64 segnum);
28 int nilfs_sufile_set_segment_usage(struct inode *sufile, __u64 segnum,
29 unsigned long nblocks, time64_t modtime);
30 int nilfs_sufile_get_stat(struct inode *, struct nilfs_sustat *);
31 ssize_t nilfs_sufile_get_suinfo(struct inode *, __u64, void *, unsigned int,
32 size_t);
33 ssize_t nilfs_sufile_set_suinfo(struct inode *, void *, unsigned int, size_t);
34
35 int nilfs_sufile_updatev(struct inode *, __u64 *, size_t, int, size_t *,
36 void (*dofunc)(struct inode *, __u64,
37 struct buffer_head *,
38 struct buffer_head *));
39 int nilfs_sufile_update(struct inode *, __u64, int,
40 void (*dofunc)(struct inode *, __u64,
41 struct buffer_head *,
42 struct buffer_head *));
43 void nilfs_sufile_do_scrap(struct inode *, __u64, struct buffer_head *,
44 struct buffer_head *);
45 void nilfs_sufile_do_free(struct inode *, __u64, struct buffer_head *,
46 struct buffer_head *);
47 void nilfs_sufile_do_cancel_free(struct inode *, __u64, struct buffer_head *,
48 struct buffer_head *);
49 void nilfs_sufile_do_set_error(struct inode *, __u64, struct buffer_head *,
50 struct buffer_head *);
51
52 int nilfs_sufile_resize(struct inode *sufile, __u64 newnsegs);
53 int nilfs_sufile_read(struct super_block *sb, size_t susize,
54 struct nilfs_inode *raw_inode, struct inode **inodep);
55 int nilfs_sufile_trim_fs(struct inode *sufile, struct fstrim_range *range);
56
57 /**
58 * nilfs_sufile_scrap - make a segment garbage
59 * @sufile: inode of segment usage file
60 * @segnum: segment number to be freed
61 *
62 * Return: 0 on success, or a negative error code on failure.
63 */
nilfs_sufile_scrap(struct inode * sufile,__u64 segnum)64 static inline int nilfs_sufile_scrap(struct inode *sufile, __u64 segnum)
65 {
66 return nilfs_sufile_update(sufile, segnum, 1, nilfs_sufile_do_scrap);
67 }
68
69 /**
70 * nilfs_sufile_free - free segment
71 * @sufile: inode of segment usage file
72 * @segnum: segment number to be freed
73 *
74 * Return: 0 on success, or a negative error code on failure.
75 */
nilfs_sufile_free(struct inode * sufile,__u64 segnum)76 static inline int nilfs_sufile_free(struct inode *sufile, __u64 segnum)
77 {
78 return nilfs_sufile_update(sufile, segnum, 0, nilfs_sufile_do_free);
79 }
80
81 /**
82 * nilfs_sufile_freev - free segments
83 * @sufile: inode of segment usage file
84 * @segnumv: array of segment numbers
85 * @nsegs: size of @segnumv array
86 * @ndone: place to store the number of freed segments
87 *
88 * Return: 0 on success, or a negative error code on failure.
89 */
nilfs_sufile_freev(struct inode * sufile,__u64 * segnumv,size_t nsegs,size_t * ndone)90 static inline int nilfs_sufile_freev(struct inode *sufile, __u64 *segnumv,
91 size_t nsegs, size_t *ndone)
92 {
93 return nilfs_sufile_updatev(sufile, segnumv, nsegs, 0, ndone,
94 nilfs_sufile_do_free);
95 }
96
97 /**
98 * nilfs_sufile_cancel_freev - reallocate freeing segments
99 * @sufile: inode of segment usage file
100 * @segnumv: array of segment numbers
101 * @nsegs: size of @segnumv array
102 * @ndone: place to store the number of cancelled segments
103 *
104 * Return: 0 on success, or a negative error code on failure.
105 */
nilfs_sufile_cancel_freev(struct inode * sufile,__u64 * segnumv,size_t nsegs,size_t * ndone)106 static inline int nilfs_sufile_cancel_freev(struct inode *sufile,
107 __u64 *segnumv, size_t nsegs,
108 size_t *ndone)
109 {
110 return nilfs_sufile_updatev(sufile, segnumv, nsegs, 0, ndone,
111 nilfs_sufile_do_cancel_free);
112 }
113
114 /**
115 * nilfs_sufile_set_error - mark a segment as erroneous
116 * @sufile: inode of segment usage file
117 * @segnum: segment number
118 *
119 * Description: nilfs_sufile_set_error() marks the segment specified by
120 * @segnum as erroneous. The error segment will never be used again.
121 *
122 * Return: 0 on success, or one of the following negative error codes on
123 * failure:
124 * * %-EINVAL - Invalid segment usage number.
125 * * %-EIO - I/O error (including metadata corruption).
126 * * %-ENOMEM - Insufficient memory available.
127 */
nilfs_sufile_set_error(struct inode * sufile,__u64 segnum)128 static inline int nilfs_sufile_set_error(struct inode *sufile, __u64 segnum)
129 {
130 return nilfs_sufile_update(sufile, segnum, 0,
131 nilfs_sufile_do_set_error);
132 }
133
134 #endif /* _NILFS_SUFILE_H */
135