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 */ 133