1/*
2 * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
3 * Copyright (C) 2004-2008 Red Hat, Inc.  All rights reserved.
4 *
5 * This copyrighted material is made available to anyone wishing to use,
6 * modify, copy, or redistribute it subject to the terms and conditions
7 * of the GNU General Public License version 2.
8 */
9
10#ifndef __RGRP_DOT_H__
11#define __RGRP_DOT_H__
12
13#include <linux/slab.h>
14#include <linux/uaccess.h>
15
16/* Since each block in the file system is represented by two bits in the
17 * bitmap, one 64-bit word in the bitmap will represent 32 blocks.
18 * By reserving 32 blocks at a time, we can optimize / shortcut how we search
19 * through the bitmaps by looking a word at a time.
20 */
21#define RGRP_RSRV_MINBYTES 8
22#define RGRP_RSRV_MINBLKS ((u32)(RGRP_RSRV_MINBYTES * GFS2_NBBY))
23#define RGRP_RSRV_ADDBLKS 64
24
25struct gfs2_rgrpd;
26struct gfs2_sbd;
27struct gfs2_holder;
28
29extern void gfs2_rgrp_verify(struct gfs2_rgrpd *rgd);
30
31extern struct gfs2_rgrpd *gfs2_blk2rgrpd(struct gfs2_sbd *sdp, u64 blk, bool exact);
32extern struct gfs2_rgrpd *gfs2_rgrpd_get_first(struct gfs2_sbd *sdp);
33extern struct gfs2_rgrpd *gfs2_rgrpd_get_next(struct gfs2_rgrpd *rgd);
34
35extern void gfs2_clear_rgrpd(struct gfs2_sbd *sdp);
36extern int gfs2_rindex_update(struct gfs2_sbd *sdp);
37extern void gfs2_free_clones(struct gfs2_rgrpd *rgd);
38extern int gfs2_rgrp_go_lock(struct gfs2_holder *gh);
39extern void gfs2_rgrp_go_unlock(struct gfs2_holder *gh);
40
41extern struct gfs2_alloc *gfs2_alloc_get(struct gfs2_inode *ip);
42
43#define GFS2_AF_ORLOV 1
44extern int gfs2_inplace_reserve(struct gfs2_inode *ip,
45				struct gfs2_alloc_parms *ap);
46extern void gfs2_inplace_release(struct gfs2_inode *ip);
47
48extern int gfs2_alloc_blocks(struct gfs2_inode *ip, u64 *bn, unsigned int *n,
49			     bool dinode, u64 *generation);
50
51extern int gfs2_rs_alloc(struct gfs2_inode *ip);
52extern void gfs2_rs_deltree(struct gfs2_blkreserv *rs);
53extern void gfs2_rs_delete(struct gfs2_inode *ip, atomic_t *wcount);
54extern void __gfs2_free_blocks(struct gfs2_inode *ip, u64 bstart, u32 blen, int meta);
55extern void gfs2_free_meta(struct gfs2_inode *ip, u64 bstart, u32 blen);
56extern void gfs2_free_di(struct gfs2_rgrpd *rgd, struct gfs2_inode *ip);
57extern void gfs2_unlink_di(struct inode *inode);
58extern int gfs2_check_blk_type(struct gfs2_sbd *sdp, u64 no_addr,
59			       unsigned int type);
60
61struct gfs2_rgrp_list {
62	unsigned int rl_rgrps;
63	unsigned int rl_space;
64	struct gfs2_rgrpd **rl_rgd;
65	struct gfs2_holder *rl_ghs;
66};
67
68extern void gfs2_rlist_add(struct gfs2_inode *ip, struct gfs2_rgrp_list *rlist,
69			   u64 block);
70extern void gfs2_rlist_alloc(struct gfs2_rgrp_list *rlist, unsigned int state);
71extern void gfs2_rlist_free(struct gfs2_rgrp_list *rlist);
72extern u64 gfs2_ri_total(struct gfs2_sbd *sdp);
73extern void gfs2_rgrp_dump(struct seq_file *seq, const struct gfs2_glock *gl);
74extern 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);
77extern int gfs2_fitrim(struct file *filp, void __user *argp);
78
79/* This is how to tell if a reservation is in the rgrp tree: */
80static inline bool gfs2_rs_active(struct gfs2_blkreserv *rs)
81{
82	return rs && !RB_EMPTY_NODE(&rs->rs_node);
83}
84
85extern void check_and_update_goal(struct gfs2_inode *ip);
86#endif /* __RGRP_DOT_H__ */
87