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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_H11#define _NILFS_SUFILE_H12 13#include <linux/fs.h>14#include <linux/buffer_head.h>15#include "mdt.h"16 17 18static 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 23unsigned long nilfs_sufile_get_ncleansegs(struct inode *sufile);24 25int nilfs_sufile_set_alloc_range(struct inode *sufile, __u64 start, __u64 end);26int nilfs_sufile_alloc(struct inode *, __u64 *);27int nilfs_sufile_mark_dirty(struct inode *sufile, __u64 segnum);28int nilfs_sufile_set_segment_usage(struct inode *sufile, __u64 segnum,29 unsigned long nblocks, time64_t modtime);30int nilfs_sufile_get_stat(struct inode *, struct nilfs_sustat *);31ssize_t nilfs_sufile_get_suinfo(struct inode *, __u64, void *, unsigned int,32 size_t);33ssize_t nilfs_sufile_set_suinfo(struct inode *, void *, unsigned int, size_t);34 35int 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 *));39int nilfs_sufile_update(struct inode *, __u64, int,40 void (*dofunc)(struct inode *, __u64,41 struct buffer_head *,42 struct buffer_head *));43void nilfs_sufile_do_scrap(struct inode *, __u64, struct buffer_head *,44 struct buffer_head *);45void nilfs_sufile_do_free(struct inode *, __u64, struct buffer_head *,46 struct buffer_head *);47void nilfs_sufile_do_cancel_free(struct inode *, __u64, struct buffer_head *,48 struct buffer_head *);49void nilfs_sufile_do_set_error(struct inode *, __u64, struct buffer_head *,50 struct buffer_head *);51 52int nilfs_sufile_resize(struct inode *sufile, __u64 newnsegs);53int nilfs_sufile_read(struct super_block *sb, size_t susize,54 struct nilfs_inode *raw_inode, struct inode **inodep);55int nilfs_sufile_trim_fs(struct inode *sufile, struct fstrim_range *range);56 57/**58 * nilfs_sufile_scrap - make a segment garbage59 * @sufile: inode of segment usage file60 * @segnum: segment number to be freed61 */62static 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 segment69 * @sufile: inode of segment usage file70 * @segnum: segment number to be freed71 */72static 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 segments79 * @sufile: inode of segment usage file80 * @segnumv: array of segment numbers81 * @nsegs: size of @segnumv array82 * @ndone: place to store the number of freed segments83 */84static 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 segments93 * @sufile: inode of segment usage file94 * @segnumv: array of segment numbers95 * @nsegs: size of @segnumv array96 * @ndone: place to store the number of cancelled segments97 *98 * Return Value: On success, 0 is returned. On error, a negative error codes99 * is returned.100 */101static 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 erroneous111 * @sufile: inode of segment usage file112 * @segnum: segment number113 *114 * Description: nilfs_sufile_set_error() marks the segment specified by115 * @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 following118 * 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 */126static 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