1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0-only */
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
4*4882a593Smuzhiyun * Copyright (C) 2004-2008 Red Hat, Inc. All rights reserved.
5*4882a593Smuzhiyun */
6*4882a593Smuzhiyun
7*4882a593Smuzhiyun #ifndef __RGRP_DOT_H__
8*4882a593Smuzhiyun #define __RGRP_DOT_H__
9*4882a593Smuzhiyun
10*4882a593Smuzhiyun #include <linux/slab.h>
11*4882a593Smuzhiyun #include <linux/uaccess.h>
12*4882a593Smuzhiyun
13*4882a593Smuzhiyun /* Since each block in the file system is represented by two bits in the
14*4882a593Smuzhiyun * bitmap, one 64-bit word in the bitmap will represent 32 blocks.
15*4882a593Smuzhiyun * By reserving 32 blocks at a time, we can optimize / shortcut how we search
16*4882a593Smuzhiyun * through the bitmaps by looking a word at a time.
17*4882a593Smuzhiyun */
18*4882a593Smuzhiyun #define RGRP_RSRV_MINBLKS 32
19*4882a593Smuzhiyun #define RGRP_RSRV_ADDBLKS 64
20*4882a593Smuzhiyun
21*4882a593Smuzhiyun struct gfs2_rgrpd;
22*4882a593Smuzhiyun struct gfs2_sbd;
23*4882a593Smuzhiyun struct gfs2_holder;
24*4882a593Smuzhiyun
25*4882a593Smuzhiyun extern void gfs2_rgrp_verify(struct gfs2_rgrpd *rgd);
26*4882a593Smuzhiyun
27*4882a593Smuzhiyun extern struct gfs2_rgrpd *gfs2_blk2rgrpd(struct gfs2_sbd *sdp, u64 blk, bool exact);
28*4882a593Smuzhiyun extern struct gfs2_rgrpd *gfs2_rgrpd_get_first(struct gfs2_sbd *sdp);
29*4882a593Smuzhiyun extern struct gfs2_rgrpd *gfs2_rgrpd_get_next(struct gfs2_rgrpd *rgd);
30*4882a593Smuzhiyun
31*4882a593Smuzhiyun extern void gfs2_clear_rgrpd(struct gfs2_sbd *sdp);
32*4882a593Smuzhiyun extern int gfs2_rindex_update(struct gfs2_sbd *sdp);
33*4882a593Smuzhiyun extern void gfs2_free_clones(struct gfs2_rgrpd *rgd);
34*4882a593Smuzhiyun extern int gfs2_rgrp_go_lock(struct gfs2_holder *gh);
35*4882a593Smuzhiyun extern void gfs2_rgrp_brelse(struct gfs2_rgrpd *rgd);
36*4882a593Smuzhiyun
37*4882a593Smuzhiyun extern struct gfs2_alloc *gfs2_alloc_get(struct gfs2_inode *ip);
38*4882a593Smuzhiyun
39*4882a593Smuzhiyun #define GFS2_AF_ORLOV 1
40*4882a593Smuzhiyun extern int gfs2_inplace_reserve(struct gfs2_inode *ip,
41*4882a593Smuzhiyun struct gfs2_alloc_parms *ap);
42*4882a593Smuzhiyun extern void gfs2_inplace_release(struct gfs2_inode *ip);
43*4882a593Smuzhiyun
44*4882a593Smuzhiyun extern int gfs2_alloc_blocks(struct gfs2_inode *ip, u64 *bn, unsigned int *n,
45*4882a593Smuzhiyun bool dinode, u64 *generation);
46*4882a593Smuzhiyun
47*4882a593Smuzhiyun extern void gfs2_rs_deltree(struct gfs2_blkreserv *rs);
48*4882a593Smuzhiyun extern void gfs2_rs_delete(struct gfs2_inode *ip);
49*4882a593Smuzhiyun extern void __gfs2_free_blocks(struct gfs2_inode *ip, struct gfs2_rgrpd *rgd,
50*4882a593Smuzhiyun u64 bstart, u32 blen, int meta);
51*4882a593Smuzhiyun extern void gfs2_free_meta(struct gfs2_inode *ip, struct gfs2_rgrpd *rgd,
52*4882a593Smuzhiyun u64 bstart, u32 blen);
53*4882a593Smuzhiyun extern void gfs2_free_di(struct gfs2_rgrpd *rgd, struct gfs2_inode *ip);
54*4882a593Smuzhiyun extern void gfs2_unlink_di(struct inode *inode);
55*4882a593Smuzhiyun extern int gfs2_check_blk_type(struct gfs2_sbd *sdp, u64 no_addr,
56*4882a593Smuzhiyun unsigned int type);
57*4882a593Smuzhiyun
58*4882a593Smuzhiyun struct gfs2_rgrp_list {
59*4882a593Smuzhiyun unsigned int rl_rgrps;
60*4882a593Smuzhiyun unsigned int rl_space;
61*4882a593Smuzhiyun struct gfs2_rgrpd **rl_rgd;
62*4882a593Smuzhiyun struct gfs2_holder *rl_ghs;
63*4882a593Smuzhiyun };
64*4882a593Smuzhiyun
65*4882a593Smuzhiyun extern void gfs2_rlist_add(struct gfs2_inode *ip, struct gfs2_rgrp_list *rlist,
66*4882a593Smuzhiyun u64 block);
67*4882a593Smuzhiyun extern void gfs2_rlist_alloc(struct gfs2_rgrp_list *rlist);
68*4882a593Smuzhiyun extern void gfs2_rlist_free(struct gfs2_rgrp_list *rlist);
69*4882a593Smuzhiyun extern u64 gfs2_ri_total(struct gfs2_sbd *sdp);
70*4882a593Smuzhiyun extern void gfs2_rgrp_dump(struct seq_file *seq, struct gfs2_rgrpd *rgd,
71*4882a593Smuzhiyun const char *fs_id_buf);
72*4882a593Smuzhiyun extern int gfs2_rgrp_send_discards(struct gfs2_sbd *sdp, u64 offset,
73*4882a593Smuzhiyun struct buffer_head *bh,
74*4882a593Smuzhiyun const struct gfs2_bitmap *bi, unsigned minlen, u64 *ptrimmed);
75*4882a593Smuzhiyun extern int gfs2_fitrim(struct file *filp, void __user *argp);
76*4882a593Smuzhiyun
77*4882a593Smuzhiyun /* This is how to tell if a reservation is in the rgrp tree: */
gfs2_rs_active(const struct gfs2_blkreserv * rs)78*4882a593Smuzhiyun static inline bool gfs2_rs_active(const struct gfs2_blkreserv *rs)
79*4882a593Smuzhiyun {
80*4882a593Smuzhiyun return rs && !RB_EMPTY_NODE(&rs->rs_node);
81*4882a593Smuzhiyun }
82*4882a593Smuzhiyun
rgrp_contains_block(struct gfs2_rgrpd * rgd,u64 block)83*4882a593Smuzhiyun static inline int rgrp_contains_block(struct gfs2_rgrpd *rgd, u64 block)
84*4882a593Smuzhiyun {
85*4882a593Smuzhiyun u64 first = rgd->rd_data0;
86*4882a593Smuzhiyun u64 last = first + rgd->rd_data;
87*4882a593Smuzhiyun return first <= block && block < last;
88*4882a593Smuzhiyun }
89*4882a593Smuzhiyun
90*4882a593Smuzhiyun extern void check_and_update_goal(struct gfs2_inode *ip);
91*4882a593Smuzhiyun #endif /* __RGRP_DOT_H__ */
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