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gerrit-public.fairphone.software / kernel / msm-4.9 / 0d12e05799e91465f6a0a9c0a983d06d40efdaf6 / . / fs / gfs2 / rgrp.h
blob: b104f4af3afdb8c2ef2f3c4f938aeca09c3bc912 [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))
Bob Peterson1a855032014-10-29 08:02:30 -0500[diff] [blame]23#define RGRP_RSRV_ADDBLKS 64
Bob Peterson8e2e0042012-07-19 08:12:40 -0400[diff] [blame]24
Steven Whitehousef2f7ba52006-09-05 10:39:21 -0400[diff] [blame]25struct gfs2_rgrpd;
26struct gfs2_sbd;
27struct gfs2_holder;
28
Steven Whitehouse09010972009-05-20 10:48:47 +0100[diff] [blame]29extern void gfs2_rgrp_verify(struct gfs2_rgrpd *rgd);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000[diff] [blame]30
Steven Whitehouse66fc0612012-02-08 12:58:32 +0000[diff] [blame]31extern struct gfs2_rgrpd *gfs2_blk2rgrpd(struct gfs2_sbd *sdp, u64 blk, bool exact);
Steven Whitehouse8339ee52011-08-31 16:38:29 +0100[diff] [blame]32extern struct gfs2_rgrpd *gfs2_rgrpd_get_first(struct gfs2_sbd *sdp);
33extern struct gfs2_rgrpd *gfs2_rgrpd_get_next(struct gfs2_rgrpd *rgd);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000[diff] [blame]34
Steven Whitehouse09010972009-05-20 10:48:47 +0100[diff] [blame]35extern void gfs2_clear_rgrpd(struct gfs2_sbd *sdp);
Steven Whitehouse8339ee52011-08-31 16:38:29 +0100[diff] [blame]36extern int gfs2_rindex_update(struct gfs2_sbd *sdp);
37extern void gfs2_free_clones(struct gfs2_rgrpd *rgd);
Bob Peterson7c9ca622011-08-31 09:53:19 +0100[diff] [blame]38extern int gfs2_rgrp_go_lock(struct gfs2_holder *gh);
39extern void gfs2_rgrp_go_unlock(struct gfs2_holder *gh);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000[diff] [blame]40
Bob Peterson8e2e0042012-07-19 08:12:40 -0400[diff] [blame]41extern struct gfs2_alloc *gfs2_alloc_get(struct gfs2_inode *ip);
42
Steven Whitehouse9dbe9612012-10-31 10:37:10 +0000[diff] [blame]43#define GFS2_AF_ORLOV 1
Steven Whitehouse7b9cff42013-10-02 11:13:25 +0100[diff] [blame]44extern int gfs2_inplace_reserve(struct gfs2_inode *ip, const struct gfs2_alloc_parms *ap);
Steven Whitehouse09010972009-05-20 10:48:47 +0100[diff] [blame]45extern void gfs2_inplace_release(struct gfs2_inode *ip);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000[diff] [blame]46
Bob Peterson6e87ed02011-11-18 10:58:32 -0500[diff] [blame]47extern int gfs2_alloc_blocks(struct gfs2_inode *ip, u64 *bn, unsigned int *n,
48 bool dinode, u64 *generation);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000[diff] [blame]49
Bob Peterson0a305e42012-06-06 11:17:59 +0100[diff] [blame]50extern int gfs2_rs_alloc(struct gfs2_inode *ip);
Bob Peterson20095212013-03-13 10:26:38 -0400[diff] [blame]51extern void gfs2_rs_deltree(struct gfs2_blkreserv *rs);
Steven Whitehouseaf5c2692013-09-27 12:49:33 +0100[diff] [blame]52extern void gfs2_rs_delete(struct gfs2_inode *ip, atomic_t *wcount);
Eric Sandeen46fcb2e2011-06-23 10:39:34 -0500[diff] [blame]53extern void __gfs2_free_blocks(struct gfs2_inode *ip, u64 bstart, u32 blen, int meta);
Steven Whitehouse09010972009-05-20 10:48:47 +0100[diff] [blame]54extern void gfs2_free_meta(struct gfs2_inode *ip, u64 bstart, u32 blen);
55extern void gfs2_free_di(struct gfs2_rgrpd *rgd, struct gfs2_inode *ip);
56extern void gfs2_unlink_di(struct inode *inode);
Steven Whitehouseacf7e242009-09-08 18:00:30 +0100[diff] [blame]57extern int gfs2_check_blk_type(struct gfs2_sbd *sdp, u64 no_addr,
58 unsigned int type);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000[diff] [blame]59
60struct 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
Steven Whitehouse70b0c362011-09-02 16:08:09 +0100[diff] [blame]67extern void gfs2_rlist_add(struct gfs2_inode *ip, struct gfs2_rgrp_list *rlist,
Steven Whitehouse09010972009-05-20 10:48:47 +0100[diff] [blame]68 u64 block);
69extern void gfs2_rlist_alloc(struct gfs2_rgrp_list *rlist, unsigned int state);
70extern void gfs2_rlist_free(struct gfs2_rgrp_list *rlist);
71extern u64 gfs2_ri_total(struct gfs2_sbd *sdp);
Steven Whitehouseac3beb62014-01-16 10:31:13 +0000[diff] [blame]72extern void gfs2_rgrp_dump(struct seq_file *seq, const struct gfs2_glock *gl);
Steven Whitehouse66fc0612012-02-08 12:58:32 +0000[diff] [blame]73extern int gfs2_rgrp_send_discards(struct gfs2_sbd *sdp, u64 offset,
74 struct buffer_head *bh,
75 const struct gfs2_bitmap *bi, unsigned minlen, u64 *ptrimmed);
76extern int gfs2_fitrim(struct file *filp, void __user *argp);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000[diff] [blame]77
Steven Whitehouse4a993fb2012-07-31 15:21:20 +0100[diff] [blame]78/* This is how to tell if a reservation is in the rgrp tree: */
79static inline bool gfs2_rs_active(struct gfs2_blkreserv *rs)
Bob Peterson8e2e0042012-07-19 08:12:40 -0400[diff] [blame]80{
Steven Whitehouse4a993fb2012-07-31 15:21:20 +0100[diff] [blame]81 return rs && !RB_EMPTY_NODE(&rs->rs_node);
Bob Peterson8e2e0042012-07-19 08:12:40 -0400[diff] [blame]82}
83
Abhi Das00a158b2014-09-18 21:40:28 -0500[diff] [blame]84extern void check_and_update_goal(struct gfs2_inode *ip);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000[diff] [blame]85#endif /* __RGRP_DOT_H__ */