| 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 | |
| 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 | static inline int nilfs_sufile_scrap(struct inode *sufile, __u64 segnum) |
| 63 | { |
| 64 | return nilfs_sufile_update(sufile, segnum, 1, nilfs_sufile_do_scrap); |
| 65 | } |
| 66 | |
| 67 | /** |
| 68 | * nilfs_sufile_free - free segment |
| 69 | * @sufile: inode of segment usage file |
| 70 | * @segnum: segment number to be freed |
| 71 | */ |
| 72 | static inline int nilfs_sufile_free(struct inode *sufile, __u64 segnum) |
| 73 | { |
| 74 | return nilfs_sufile_update(sufile, segnum, 0, nilfs_sufile_do_free); |
| 75 | } |
| 76 | |
| 77 | /** |
| 78 | * nilfs_sufile_freev - free segments |
| 79 | * @sufile: inode of segment usage file |
| 80 | * @segnumv: array of segment numbers |
| 81 | * @nsegs: size of @segnumv array |
| 82 | * @ndone: place to store the number of freed segments |
| 83 | */ |
| 84 | static inline int nilfs_sufile_freev(struct inode *sufile, __u64 *segnumv, |
| 85 | size_t nsegs, size_t *ndone) |
| 86 | { |
| 87 | return nilfs_sufile_updatev(sufile, segnumv, nsegs, 0, ndone, |
| 88 | nilfs_sufile_do_free); |
| 89 | } |
| 90 | |
| 91 | /** |
| 92 | * nilfs_sufile_cancel_freev - reallocate freeing segments |
| 93 | * @sufile: inode of segment usage file |
| 94 | * @segnumv: array of segment numbers |
| 95 | * @nsegs: size of @segnumv array |
| 96 | * @ndone: place to store the number of cancelled segments |
| 97 | * |
| 98 | * Return Value: On success, 0 is returned. On error, a negative error codes |
| 99 | * is returned. |
| 100 | */ |
| 101 | static inline int nilfs_sufile_cancel_freev(struct inode *sufile, |
| 102 | __u64 *segnumv, size_t nsegs, |
| 103 | size_t *ndone) |
| 104 | { |
| 105 | return nilfs_sufile_updatev(sufile, segnumv, nsegs, 0, ndone, |
| 106 | nilfs_sufile_do_cancel_free); |
| 107 | } |
| 108 | |
| 109 | /** |
| 110 | * nilfs_sufile_set_error - mark a segment as erroneous |
| 111 | * @sufile: inode of segment usage file |
| 112 | * @segnum: segment number |
| 113 | * |
| 114 | * Description: nilfs_sufile_set_error() marks the segment specified by |
| 115 | * @segnum as erroneous. The error segment will never be used again. |
| 116 | * |
| 117 | * Return Value: On success, 0 is returned. On error, one of the following |
| 118 | * negative error codes is returned. |
| 119 | * |
| 120 | * %-EIO - I/O error. |
| 121 | * |
| 122 | * %-ENOMEM - Insufficient amount of memory available. |
| 123 | * |
| 124 | * %-EINVAL - Invalid segment usage number. |
| 125 | */ |
| 126 | static inline int nilfs_sufile_set_error(struct inode *sufile, __u64 segnum) |
| 127 | { |
| 128 | return nilfs_sufile_update(sufile, segnum, 0, |
| 129 | nilfs_sufile_do_set_error); |
| 130 | } |
| 131 | |
| 132 | #endif /* _NILFS_SUFILE_H */ |