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gerrit-public.fairphone.software / kernel / msm-4.9 / e92a0370575ab985bcdc3ba1520bf946521d62f1 / . / fs / gfs2 / rgrp.h
blob: c0ab33fa3eed1c2439da582a21eaf2eba9223455 [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);
Bob Peterson39b0f1e2015-06-05 08:38:57 -0500[diff] [blame]39extern void gfs2_rgrp_brelse(struct gfs2_rgrpd *rgd);
Bob Peterson7c9ca622011-08-31 09:53:19 +0100[diff] [blame]40extern void gfs2_rgrp_go_unlock(struct gfs2_holder *gh);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000[diff] [blame]41
Bob Peterson8e2e0042012-07-19 08:12:40 -0400[diff] [blame]42extern struct gfs2_alloc *gfs2_alloc_get(struct gfs2_inode *ip);
43
Steven Whitehouse9dbe9612012-10-31 10:37:10 +0000[diff] [blame]44#define GFS2_AF_ORLOV 1
Abhi Das25435e52015-03-18 12:04:37 -0500[diff] [blame]45extern int gfs2_inplace_reserve(struct gfs2_inode *ip,
46 struct gfs2_alloc_parms *ap);
Steven Whitehouse09010972009-05-20 10:48:47 +0100[diff] [blame]47extern void gfs2_inplace_release(struct gfs2_inode *ip);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000[diff] [blame]48
Bob Peterson6e87ed02011-11-18 10:58:32 -0500[diff] [blame]49extern int gfs2_alloc_blocks(struct gfs2_inode *ip, u64 *bn, unsigned int *n,
50 bool dinode, u64 *generation);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000[diff] [blame]51
Bob Peterson0a305e42012-06-06 11:17:59 +0100[diff] [blame]52extern int gfs2_rs_alloc(struct gfs2_inode *ip);
Bob Peterson20095212013-03-13 10:26:38 -0400[diff] [blame]53extern void gfs2_rs_deltree(struct gfs2_blkreserv *rs);
Steven Whitehouseaf5c2692013-09-27 12:49:33 +0100[diff] [blame]54extern void gfs2_rs_delete(struct gfs2_inode *ip, atomic_t *wcount);
Eric Sandeen46fcb2e2011-06-23 10:39:34 -0500[diff] [blame]55extern void __gfs2_free_blocks(struct gfs2_inode *ip, u64 bstart, u32 blen, int meta);
Steven Whitehouse09010972009-05-20 10:48:47 +0100[diff] [blame]56extern void gfs2_free_meta(struct gfs2_inode *ip, u64 bstart, u32 blen);
57extern void gfs2_free_di(struct gfs2_rgrpd *rgd, struct gfs2_inode *ip);
58extern void gfs2_unlink_di(struct inode *inode);
Steven Whitehouseacf7e242009-09-08 18:00:30 +0100[diff] [blame]59extern int gfs2_check_blk_type(struct gfs2_sbd *sdp, u64 no_addr,
60 unsigned int type);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000[diff] [blame]61
62struct 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
Steven Whitehouse70b0c362011-09-02 16:08:09 +0100[diff] [blame]69extern void gfs2_rlist_add(struct gfs2_inode *ip, struct gfs2_rgrp_list *rlist,
Steven Whitehouse09010972009-05-20 10:48:47 +0100[diff] [blame]70 u64 block);
71extern void gfs2_rlist_alloc(struct gfs2_rgrp_list *rlist, unsigned int state);
72extern void gfs2_rlist_free(struct gfs2_rgrp_list *rlist);
73extern u64 gfs2_ri_total(struct gfs2_sbd *sdp);
Steven Whitehouseac3beb62014-01-16 10:31:13 +0000[diff] [blame]74extern void gfs2_rgrp_dump(struct seq_file *seq, const struct gfs2_glock *gl);
Steven Whitehouse66fc0612012-02-08 12:58:32 +0000[diff] [blame]75extern 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);
78extern int gfs2_fitrim(struct file *filp, void __user *argp);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000[diff] [blame]79
Steven Whitehouse4a993fb2012-07-31 15:21:20 +0100[diff] [blame]80/* This is how to tell if a reservation is in the rgrp tree: */
81static inline bool gfs2_rs_active(struct gfs2_blkreserv *rs)
Bob Peterson8e2e0042012-07-19 08:12:40 -0400[diff] [blame]82{
Steven Whitehouse4a993fb2012-07-31 15:21:20 +0100[diff] [blame]83 return rs && !RB_EMPTY_NODE(&rs->rs_node);
Bob Peterson8e2e0042012-07-19 08:12:40 -0400[diff] [blame]84}
85
Abhi Das00a158b2014-09-18 21:40:28 -0500[diff] [blame]86extern void check_and_update_goal(struct gfs2_inode *ip);
David Teiglandb3b94fa2006-01-16 16:50:04 +0000[diff] [blame]87#endif /* __RGRP_DOT_H__ */