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
25 struct gfs2_rgrpd;
26 struct gfs2_sbd;
27 struct gfs2_holder;
28
29 extern void gfs2_rgrp_verify(struct gfs2_rgrpd *rgd);
30
31 extern struct gfs2_rgrpd *gfs2_blk2rgrpd(struct gfs2_sbd *sdp, u64 blk, bool exact);
32 extern struct gfs2_rgrpd *gfs2_rgrpd_get_first(struct gfs2_sbd *sdp);
33 extern struct gfs2_rgrpd *gfs2_rgrpd_get_next(struct gfs2_rgrpd *rgd);
34
35 extern void gfs2_clear_rgrpd(struct gfs2_sbd *sdp);
36 extern int gfs2_rindex_update(struct gfs2_sbd *sdp);
37 extern void gfs2_free_clones(struct gfs2_rgrpd *rgd);
38 extern int gfs2_rgrp_go_lock(struct gfs2_holder *gh);
39 extern void gfs2_rgrp_brelse(struct gfs2_rgrpd *rgd);
40 extern void gfs2_rgrp_go_unlock(struct gfs2_holder *gh);
41
42 extern struct gfs2_alloc *gfs2_alloc_get(struct gfs2_inode *ip);
43
44 #define GFS2_AF_ORLOV 1
45 extern int gfs2_inplace_reserve(struct gfs2_inode *ip,
46 struct gfs2_alloc_parms *ap);
47 extern void gfs2_inplace_release(struct gfs2_inode *ip);
48
49 extern int gfs2_alloc_blocks(struct gfs2_inode *ip, u64 *bn, unsigned int *n,
50 bool dinode, u64 *generation);
51
52 extern int gfs2_rsqa_alloc(struct gfs2_inode *ip);
53 extern void gfs2_rs_deltree(struct gfs2_blkreserv *rs);
54 extern void gfs2_rsqa_delete(struct gfs2_inode *ip, atomic_t *wcount);
55 extern void __gfs2_free_blocks(struct gfs2_inode *ip, u64 bstart, u32 blen, int meta);
56 extern void gfs2_free_meta(struct gfs2_inode *ip, u64 bstart, u32 blen);
57 extern void gfs2_free_di(struct gfs2_rgrpd *rgd, struct gfs2_inode *ip);
58 extern void gfs2_unlink_di(struct inode *inode);
59 extern int gfs2_check_blk_type(struct gfs2_sbd *sdp, u64 no_addr,
60 unsigned int type);
61
62 struct gfs2_rgrp_list {
63 unsigned int rl_rgrps;
64 unsigned int rl_space;
65 struct gfs2_rgrpd **rl_rgd;
66 struct gfs2_holder *rl_ghs;
67 };
68
69 extern void gfs2_rlist_add(struct gfs2_inode *ip, struct gfs2_rgrp_list *rlist,
70 u64 block);
71 extern void gfs2_rlist_alloc(struct gfs2_rgrp_list *rlist, unsigned int state);
72 extern void gfs2_rlist_free(struct gfs2_rgrp_list *rlist);
73 extern u64 gfs2_ri_total(struct gfs2_sbd *sdp);
74 extern void gfs2_rgrp_dump(struct seq_file *seq, const struct gfs2_glock *gl);
75 extern int gfs2_rgrp_send_discards(struct gfs2_sbd *sdp, u64 offset,
76 struct buffer_head *bh,
77 const struct gfs2_bitmap *bi, unsigned minlen, u64 *ptrimmed);
78 extern int gfs2_fitrim(struct file *filp, void __user *argp);
79
80 /* This is how to tell if a reservation is in the rgrp tree: */
gfs2_rs_active(const struct gfs2_blkreserv * rs)81 static inline bool gfs2_rs_active(const struct gfs2_blkreserv *rs)
82 {
83 return rs && !RB_EMPTY_NODE(&rs->rs_node);
84 }
85
rgrp_contains_block(struct gfs2_rgrpd * rgd,u64 block)86 static inline int rgrp_contains_block(struct gfs2_rgrpd *rgd, u64 block)
87 {
88 u64 first = rgd->rd_data0;
89 u64 last = first + rgd->rd_data;
90 return first <= block && block < last;
91 }
92
93 extern void check_and_update_goal(struct gfs2_inode *ip);
94 #endif /* __RGRP_DOT_H__ */
95