LXR linux/fs/gfs2/rgrp.h

   1/* SPDX-License-Identifier: GPL-2.0-only */
   2/*
   3 * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
   4 * Copyright (C) 2004-2008 Red Hat, Inc.  All rights reserved.
   5 */
   6
   7#ifndef __RGRP_DOT_H__
   8#define __RGRP_DOT_H__
   9
  10#include <linux/slab.h>
  11#include <linux/uaccess.h>
  12
  13/* Since each block in the file system is represented by two bits in the
  14 * bitmap, one 64-bit word in the bitmap will represent 32 blocks.
  15 * By reserving 32 blocks at a time, we can optimize / shortcut how we search
  16 * through the bitmaps by looking a word at a time.
  17 */
  18#define RGRP_RSRV_MINBLKS 32
  19#define RGRP_RSRV_ADDBLKS 64
  20
  21struct gfs2_rgrpd;
  22struct gfs2_sbd;
  23struct gfs2_holder;
  24
  25extern void gfs2_rgrp_verify(struct gfs2_rgrpd *rgd);
  26
  27extern struct gfs2_rgrpd *gfs2_blk2rgrpd(struct gfs2_sbd *sdp, u64 blk, bool exact);
  28extern struct gfs2_rgrpd *gfs2_rgrpd_get_first(struct gfs2_sbd *sdp);
  29extern struct gfs2_rgrpd *gfs2_rgrpd_get_next(struct gfs2_rgrpd *rgd);
  30
  31extern void gfs2_clear_rgrpd(struct gfs2_sbd *sdp);
  32extern int gfs2_rindex_update(struct gfs2_sbd *sdp);
  33extern void gfs2_free_clones(struct gfs2_rgrpd *rgd);
  34extern int gfs2_rgrp_go_instantiate(struct gfs2_holder *gh);
  35extern void gfs2_rgrp_brelse(struct gfs2_rgrpd *rgd);
  36
  37extern struct gfs2_alloc *gfs2_alloc_get(struct gfs2_inode *ip);
  38
  39#define GFS2_AF_ORLOV 1
  40extern int gfs2_inplace_reserve(struct gfs2_inode *ip,
  41                                struct gfs2_alloc_parms *ap);
  42extern void gfs2_inplace_release(struct gfs2_inode *ip);
  43
  44extern int gfs2_alloc_blocks(struct gfs2_inode *ip, u64 *bn, unsigned int *n,
  45                             bool dinode, u64 *generation);
  46
  47extern void gfs2_rs_deltree(struct gfs2_blkreserv *rs);
  48extern void gfs2_rs_delete(struct gfs2_inode *ip);
  49extern void __gfs2_free_blocks(struct gfs2_inode *ip, struct gfs2_rgrpd *rgd,
  50                               u64 bstart, u32 blen, int meta);
  51extern void gfs2_free_meta(struct gfs2_inode *ip, struct gfs2_rgrpd *rgd,
  52                           u64 bstart, u32 blen);
  53extern void gfs2_free_di(struct gfs2_rgrpd *rgd, struct gfs2_inode *ip);
  54extern void gfs2_unlink_di(struct inode *inode);
  55extern int gfs2_check_blk_type(struct gfs2_sbd *sdp, u64 no_addr,
  56                               unsigned int type);
  57
  58struct gfs2_rgrp_list {
  59        unsigned int rl_rgrps;
  60        unsigned int rl_space;
  61        struct gfs2_rgrpd **rl_rgd;
  62        struct gfs2_holder *rl_ghs;
  63};
  64
  65extern void gfs2_rlist_add(struct gfs2_inode *ip, struct gfs2_rgrp_list *rlist,
  66                           u64 block);
  67extern void gfs2_rlist_alloc(struct gfs2_rgrp_list *rlist);
  68extern void gfs2_rlist_free(struct gfs2_rgrp_list *rlist);
  69extern u64 gfs2_ri_total(struct gfs2_sbd *sdp);
  70extern void gfs2_rgrp_dump(struct seq_file *seq, struct gfs2_rgrpd *rgd,
  71                           const char *fs_id_buf);
  72extern int gfs2_rgrp_send_discards(struct gfs2_sbd *sdp, u64 offset,
  73                                   struct buffer_head *bh,
  74                                   const struct gfs2_bitmap *bi, unsigned minlen, u64 *ptrimmed);
  75extern int gfs2_fitrim(struct file *filp, void __user *argp);
  76
  77/* This is how to tell if a reservation is in the rgrp tree: */
  78static inline bool gfs2_rs_active(const struct gfs2_blkreserv *rs)
  79{
  80        return !RB_EMPTY_NODE(&rs->rs_node);
  81}
  82
  83static inline int rgrp_contains_block(struct gfs2_rgrpd *rgd, u64 block)
  84{
  85        u64 first = rgd->rd_data0;
  86        u64 last = first + rgd->rd_data;
  87        return first <= block && block < last;
  88}
  89
  90extern void check_and_update_goal(struct gfs2_inode *ip);
  91
  92extern void rgrp_lock_local(struct gfs2_rgrpd *rgd);
  93extern void rgrp_unlock_local(struct gfs2_rgrpd *rgd);
  94
  95#endif /* __RGRP_DOT_H__ */
  96