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
  21 struct gfs2_rgrpd;
  22 struct gfs2_sbd;
  23 struct gfs2_holder;
  24
  25 extern void gfs2_rgrp_verify(struct gfs2_rgrpd *rgd);
  26
  27 extern struct gfs2_rgrpd *gfs2_blk2rgrpd(struct gfs2_sbd *sdp, u64 blk, bool exact);
  28 extern struct gfs2_rgrpd *gfs2_rgrpd_get_first(struct gfs2_sbd *sdp);
  29 extern struct gfs2_rgrpd *gfs2_rgrpd_get_next(struct gfs2_rgrpd *rgd);
  30
  31 extern void gfs2_clear_rgrpd(struct gfs2_sbd *sdp);
  32 extern int gfs2_rindex_update(struct gfs2_sbd *sdp);
  33 extern void gfs2_free_clones(struct gfs2_rgrpd *rgd);
  34 extern int gfs2_rgrp_go_lock(struct gfs2_holder *gh);
  35 extern void gfs2_rgrp_brelse(struct gfs2_rgrpd *rgd);
  36 extern void gfs2_rgrp_go_unlock(struct gfs2_holder *gh);
  37
  38 extern struct gfs2_alloc *gfs2_alloc_get(struct gfs2_inode *ip);
  39
  40 #define GFS2_AF_ORLOV 1
  41 extern int gfs2_inplace_reserve(struct gfs2_inode *ip,
  42                                 struct gfs2_alloc_parms *ap);
  43 extern void gfs2_inplace_release(struct gfs2_inode *ip);
  44
  45 extern int gfs2_alloc_blocks(struct gfs2_inode *ip, u64 *bn, unsigned int *n,
  46                              bool dinode, u64 *generation);
  47
  48 extern int gfs2_rsqa_alloc(struct gfs2_inode *ip);
  49 extern void gfs2_rs_deltree(struct gfs2_blkreserv *rs);
  50 extern void gfs2_rsqa_delete(struct gfs2_inode *ip, atomic_t *wcount);
  51 extern void __gfs2_free_blocks(struct gfs2_inode *ip, struct gfs2_rgrpd *rgd,
  52                                u64 bstart, u32 blen, int meta);
  53 extern void gfs2_free_meta(struct gfs2_inode *ip, struct gfs2_rgrpd *rgd,
  54                            u64 bstart, u32 blen);
  55 extern void gfs2_free_di(struct gfs2_rgrpd *rgd, struct gfs2_inode *ip);
  56 extern void gfs2_unlink_di(struct inode *inode);
  57 extern int gfs2_check_blk_type(struct gfs2_sbd *sdp, u64 no_addr,
  58                                unsigned int type);
  59
  60 struct gfs2_rgrp_list {
  61         unsigned int rl_rgrps;
  62         unsigned int rl_space;
  63         struct gfs2_rgrpd **rl_rgd;
  64         struct gfs2_holder *rl_ghs;
  65 };
  66
  67 extern void gfs2_rlist_add(struct gfs2_inode *ip, struct gfs2_rgrp_list *rlist,
  68                            u64 block);
  69 extern void gfs2_rlist_alloc(struct gfs2_rgrp_list *rlist);
  70 extern void gfs2_rlist_free(struct gfs2_rgrp_list *rlist);
  71 extern u64 gfs2_ri_total(struct gfs2_sbd *sdp);
  72 extern void gfs2_rgrp_dump(struct seq_file *seq, struct gfs2_glock *gl,
  73                            const char *fs_id_buf);
  74 extern int gfs2_rgrp_send_discards(struct gfs2_sbd *sdp, u64 offset,
  75                                    struct buffer_head *bh,
  76                                    const struct gfs2_bitmap *bi, unsigned minlen, u64 *ptrimmed);
  77 extern int gfs2_fitrim(struct file *filp, void __user *argp);
  78
  79 /* This is how to tell if a reservation is in the rgrp tree: */
  80 static inline bool gfs2_rs_active(const struct gfs2_blkreserv *rs)
  81 {
  82         return rs && !RB_EMPTY_NODE(&rs->rs_node);
  83 }
  84
  85 static inline int rgrp_contains_block(struct gfs2_rgrpd *rgd, u64 block)
  86 {
  87         u64 first = rgd->rd_data0;
  88         u64 last = first + rgd->rd_data;
  89         return first <= block && block < last;
  90 }
  91
  92 extern void check_and_update_goal(struct gfs2_inode *ip);
  93 #endif /* __RGRP_DOT_H__ */