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gerrit-public.fairphone.software / kernel / msm-4.9 / 2c3de1c2d7d68c6ba4c1ecd82c68285f34d9609e / . / fs / gfs2 / rgrp.h
blob: 842185853f6b2a990f37359590afebd6e61ddc2c [file] [log] [blame]
David Teiglandb3b94fa2006-01-16 16:50:04 +0000[diff] [blame]1/*
2 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
Bob Petersonfe6c9912008-01-28 11:13:02 -0600[diff] [blame]3 * Copyright (C) 2004-2008 Red Hat, Inc. All rights reserved.
David Teiglandb3b94fa2006-01-16 16:50:04 +0000[diff] [blame]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
Steven Whitehousee9fc2aa2006-09-01 11:05:15 -0400[diff] [blame]7 * of the GNU General Public License version 2.
David Teiglandb3b94fa2006-01-16 16:50:04 +0000[diff] [blame]8 */
9
10#ifndef __RGRP_DOT_H__
11#define __RGRP_DOT_H__
12
Tejun Heo5a0e3ad2010-03-24 17:04:11 +0900[diff] [blame]13#include <linux/slab.h>
Steven Whitehouse66fc0612012-02-08 12:58:32 +0000[diff] [blame]14#include <linux/uaccess.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +0900[diff] [blame]15
Bob Peterson8e2e0042012-07-19 08:12:40 -0400[diff] [blame]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
Steven Whitehousef2f7ba52006-09-05 10:39:21 -0400[diff] [blame]24struct gfs2_rgrpd;
25struct gfs2_sbd;
26struct gfs2_holder;
27
Steven Whitehouse09010972009-05-20 10:48:47 +0100[diff] [blame]28extern void gfs2_rgrp_verify(struct gfs2_rgrpd *rgd);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000[diff] [blame]29
Steven Whitehouse66fc0612012-02-08 12:58:32 +0000[diff] [blame]30extern struct gfs2_rgrpd *gfs2_blk2rgrpd(struct gfs2_sbd *sdp, u64 blk, bool exact);
Steven Whitehouse8339ee52011-08-31 16:38:29 +0100[diff] [blame]31extern struct gfs2_rgrpd *gfs2_rgrpd_get_first(struct gfs2_sbd *sdp);
32extern struct gfs2_rgrpd *gfs2_rgrpd_get_next(struct gfs2_rgrpd *rgd);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000[diff] [blame]33
Steven Whitehouse09010972009-05-20 10:48:47 +0100[diff] [blame]34extern void gfs2_clear_rgrpd(struct gfs2_sbd *sdp);
Steven Whitehouse8339ee52011-08-31 16:38:29 +0100[diff] [blame]35extern int gfs2_rindex_update(struct gfs2_sbd *sdp);
36extern void gfs2_free_clones(struct gfs2_rgrpd *rgd);
Bob Peterson7c9ca622011-08-31 09:53:19 +0100[diff] [blame]37extern int gfs2_rgrp_go_lock(struct gfs2_holder *gh);
38extern void gfs2_rgrp_go_unlock(struct gfs2_holder *gh);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000[diff] [blame]39
Bob Peterson8e2e0042012-07-19 08:12:40 -0400[diff] [blame]40extern struct gfs2_alloc *gfs2_alloc_get(struct gfs2_inode *ip);
41
Steven Whitehouse9dbe9612012-10-31 10:37:10 +0000[diff] [blame]42#define GFS2_AF_ORLOV 1
43extern int gfs2_inplace_reserve(struct gfs2_inode *ip, u32 requested, u32 flags);
Steven Whitehouse09010972009-05-20 10:48:47 +0100[diff] [blame]44extern void gfs2_inplace_release(struct gfs2_inode *ip);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000[diff] [blame]45
Bob Peterson6e87ed02011-11-18 10:58:32 -0500[diff] [blame]46extern int gfs2_alloc_blocks(struct gfs2_inode *ip, u64 *bn, unsigned int *n,
47 bool dinode, u64 *generation);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000[diff] [blame]48
Bob Peterson0a305e42012-06-06 11:17:59 +0100[diff] [blame]49extern int gfs2_rs_alloc(struct gfs2_inode *ip);
Steven Whitehouse4a993fb2012-07-31 15:21:20 +0100[diff] [blame]50extern void gfs2_rs_deltree(struct gfs2_inode *ip, struct gfs2_blkreserv *rs);
Bob Peterson0a305e42012-06-06 11:17:59 +0100[diff] [blame]51extern void gfs2_rs_delete(struct gfs2_inode *ip);
Eric Sandeen46fcb2e2011-06-23 10:39:34 -0500[diff] [blame]52extern void __gfs2_free_blocks(struct gfs2_inode *ip, u64 bstart, u32 blen, int meta);
Steven Whitehouse09010972009-05-20 10:48:47 +0100[diff] [blame]53extern void gfs2_free_meta(struct gfs2_inode *ip, u64 bstart, u32 blen);
54extern void gfs2_free_di(struct gfs2_rgrpd *rgd, struct gfs2_inode *ip);
55extern void gfs2_unlink_di(struct inode *inode);
Steven Whitehouseacf7e242009-09-08 18:00:30 +0100[diff] [blame]56extern int gfs2_check_blk_type(struct gfs2_sbd *sdp, u64 no_addr,
57 unsigned int type);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000[diff] [blame]58
59struct gfs2_rgrp_list {
60 unsigned int rl_rgrps;
61 unsigned int rl_space;
62 struct gfs2_rgrpd **rl_rgd;
63 struct gfs2_holder *rl_ghs;
64};
65
Steven Whitehouse70b0c362011-09-02 16:08:09 +0100[diff] [blame]66extern void gfs2_rlist_add(struct gfs2_inode *ip, struct gfs2_rgrp_list *rlist,
Steven Whitehouse09010972009-05-20 10:48:47 +0100[diff] [blame]67 u64 block);
68extern void gfs2_rlist_alloc(struct gfs2_rgrp_list *rlist, unsigned int state);
69extern void gfs2_rlist_free(struct gfs2_rgrp_list *rlist);
70extern u64 gfs2_ri_total(struct gfs2_sbd *sdp);
71extern int gfs2_rgrp_dump(struct seq_file *seq, const struct gfs2_glock *gl);
Steven Whitehouse66fc0612012-02-08 12:58:32 +0000[diff] [blame]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);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000[diff] [blame]76
Steven Whitehouse4a993fb2012-07-31 15:21:20 +0100[diff] [blame]77/* This is how to tell if a reservation is in the rgrp tree: */
78static inline bool gfs2_rs_active(struct gfs2_blkreserv *rs)
Bob Peterson8e2e0042012-07-19 08:12:40 -0400[diff] [blame]79{
Steven Whitehouse4a993fb2012-07-31 15:21:20 +0100[diff] [blame]80 return rs && !RB_EMPTY_NODE(&rs->rs_node);
Bob Peterson8e2e0042012-07-19 08:12:40 -0400[diff] [blame]81}
82
David Teiglandb3b94fa2006-01-16 16:50:04 +0000[diff] [blame]83#endif /* __RGRP_DOT_H__ */