LXR linux/fs/nilfs2/sufile.h

   1/* SPDX-License-Identifier: GPL-2.0+ */
   2/*
   3 * sufile.h - 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
  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 garbage
  59 * @sufile: inode of segment usage file
  60 * @segnum: segment number to be freed
  61 */
  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 segment
  69 * @sufile: inode of segment usage file
  70 * @segnum: segment number to be freed
  71 */
  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 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 */
  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 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 */
 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 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 */
 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