David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. |
Bob Peterson | fe6c991 | 2008-01-28 11:13:02 -0600 | [diff] [blame] | 3 | * Copyright (C) 2004-2008 Red Hat, Inc. All rights reserved. |
David Teigland | b3b94fa | 2006-01-16 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 Whitehouse | e9fc2aa | 2006-09-01 11:05:15 -0400 | [diff] [blame] | 7 | * of the GNU General Public License version 2. |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 8 | */ |
| 9 | |
| 10 | #ifndef __RGRP_DOT_H__ |
| 11 | #define __RGRP_DOT_H__ |
| 12 | |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 13 | #include <linux/slab.h> |
Steven Whitehouse | 66fc061 | 2012-02-08 12:58:32 +0000 | [diff] [blame] | 14 | #include <linux/uaccess.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 15 | |
Bob Peterson | 8e2e004 | 2012-07-19 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 Whitehouse | f2f7ba5 | 2006-09-05 10:39:21 -0400 | [diff] [blame] | 24 | struct gfs2_rgrpd; |
| 25 | struct gfs2_sbd; |
| 26 | struct gfs2_holder; |
| 27 | |
Steven Whitehouse | 0901097 | 2009-05-20 10:48:47 +0100 | [diff] [blame] | 28 | extern void gfs2_rgrp_verify(struct gfs2_rgrpd *rgd); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 29 | |
Steven Whitehouse | 66fc061 | 2012-02-08 12:58:32 +0000 | [diff] [blame] | 30 | extern struct gfs2_rgrpd *gfs2_blk2rgrpd(struct gfs2_sbd *sdp, u64 blk, bool exact); |
Steven Whitehouse | 8339ee5 | 2011-08-31 16:38:29 +0100 | [diff] [blame] | 31 | extern struct gfs2_rgrpd *gfs2_rgrpd_get_first(struct gfs2_sbd *sdp); |
| 32 | extern struct gfs2_rgrpd *gfs2_rgrpd_get_next(struct gfs2_rgrpd *rgd); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 33 | |
Steven Whitehouse | 0901097 | 2009-05-20 10:48:47 +0100 | [diff] [blame] | 34 | extern void gfs2_clear_rgrpd(struct gfs2_sbd *sdp); |
Steven Whitehouse | 8339ee5 | 2011-08-31 16:38:29 +0100 | [diff] [blame] | 35 | extern int gfs2_rindex_update(struct gfs2_sbd *sdp); |
| 36 | extern void gfs2_free_clones(struct gfs2_rgrpd *rgd); |
Bob Peterson | 7c9ca62 | 2011-08-31 09:53:19 +0100 | [diff] [blame] | 37 | extern int gfs2_rgrp_go_lock(struct gfs2_holder *gh); |
| 38 | extern void gfs2_rgrp_go_unlock(struct gfs2_holder *gh); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 39 | |
Bob Peterson | 8e2e004 | 2012-07-19 08:12:40 -0400 | [diff] [blame] | 40 | extern struct gfs2_alloc *gfs2_alloc_get(struct gfs2_inode *ip); |
| 41 | |
Bob Peterson | 564e12b | 2011-11-21 13:36:17 -0500 | [diff] [blame] | 42 | extern int gfs2_inplace_reserve(struct gfs2_inode *ip, u32 requested); |
Steven Whitehouse | 0901097 | 2009-05-20 10:48:47 +0100 | [diff] [blame] | 43 | extern void gfs2_inplace_release(struct gfs2_inode *ip); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 44 | |
Bob Peterson | 6e87ed0 | 2011-11-18 10:58:32 -0500 | [diff] [blame] | 45 | extern int gfs2_alloc_blocks(struct gfs2_inode *ip, u64 *bn, unsigned int *n, |
| 46 | bool dinode, u64 *generation); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 47 | |
Bob Peterson | 0a305e4 | 2012-06-06 11:17:59 +0100 | [diff] [blame] | 48 | extern int gfs2_rs_alloc(struct gfs2_inode *ip); |
Bob Peterson | 8e2e004 | 2012-07-19 08:12:40 -0400 | [diff] [blame] | 49 | extern void gfs2_rs_deltree(struct gfs2_blkreserv *rs); |
Bob Peterson | 0a305e4 | 2012-06-06 11:17:59 +0100 | [diff] [blame] | 50 | extern void gfs2_rs_delete(struct gfs2_inode *ip); |
Eric Sandeen | 46fcb2e | 2011-06-23 10:39:34 -0500 | [diff] [blame] | 51 | extern void __gfs2_free_blocks(struct gfs2_inode *ip, u64 bstart, u32 blen, int meta); |
Steven Whitehouse | 0901097 | 2009-05-20 10:48:47 +0100 | [diff] [blame] | 52 | extern void gfs2_free_meta(struct gfs2_inode *ip, u64 bstart, u32 blen); |
| 53 | extern void gfs2_free_di(struct gfs2_rgrpd *rgd, struct gfs2_inode *ip); |
| 54 | extern void gfs2_unlink_di(struct inode *inode); |
Steven Whitehouse | acf7e24 | 2009-09-08 18:00:30 +0100 | [diff] [blame] | 55 | extern int gfs2_check_blk_type(struct gfs2_sbd *sdp, u64 no_addr, |
| 56 | unsigned int type); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 57 | |
| 58 | struct gfs2_rgrp_list { |
| 59 | unsigned int rl_rgrps; |
| 60 | unsigned int rl_space; |
| 61 | struct gfs2_rgrpd **rl_rgd; |
| 62 | struct gfs2_holder *rl_ghs; |
| 63 | }; |
| 64 | |
Steven Whitehouse | 70b0c36 | 2011-09-02 16:08:09 +0100 | [diff] [blame] | 65 | extern void gfs2_rlist_add(struct gfs2_inode *ip, struct gfs2_rgrp_list *rlist, |
Steven Whitehouse | 0901097 | 2009-05-20 10:48:47 +0100 | [diff] [blame] | 66 | u64 block); |
| 67 | extern void gfs2_rlist_alloc(struct gfs2_rgrp_list *rlist, unsigned int state); |
| 68 | extern void gfs2_rlist_free(struct gfs2_rgrp_list *rlist); |
| 69 | extern u64 gfs2_ri_total(struct gfs2_sbd *sdp); |
| 70 | extern int gfs2_rgrp_dump(struct seq_file *seq, const struct gfs2_glock *gl); |
Steven Whitehouse | 66fc061 | 2012-02-08 12:58:32 +0000 | [diff] [blame] | 71 | extern int gfs2_rgrp_send_discards(struct gfs2_sbd *sdp, u64 offset, |
| 72 | struct buffer_head *bh, |
| 73 | const struct gfs2_bitmap *bi, unsigned minlen, u64 *ptrimmed); |
| 74 | extern int gfs2_fitrim(struct file *filp, void __user *argp); |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 75 | |
Bob Peterson | 8e2e004 | 2012-07-19 08:12:40 -0400 | [diff] [blame] | 76 | /* This is how to tell if a multi-block reservation is "inplace" reserved: */ |
Bob Peterson | 0a305e4 | 2012-06-06 11:17:59 +0100 | [diff] [blame] | 77 | static inline int gfs2_mb_reserved(struct gfs2_inode *ip) |
| 78 | { |
| 79 | if (ip->i_res && ip->i_res->rs_requested) |
| 80 | return 1; |
| 81 | return 0; |
| 82 | } |
| 83 | |
Bob Peterson | 8e2e004 | 2012-07-19 08:12:40 -0400 | [diff] [blame] | 84 | /* This is how to tell if a multi-block reservation is in the rgrp tree: */ |
| 85 | static inline int gfs2_rs_active(struct gfs2_blkreserv *rs) |
| 86 | { |
| 87 | if (rs && rs->rs_bi) |
| 88 | return 1; |
| 89 | return 0; |
| 90 | } |
| 91 | |
| 92 | static inline u32 gfs2_bi2rgd_blk(const struct gfs2_bitmap *bi, u32 blk) |
| 93 | { |
| 94 | return (bi->bi_start * GFS2_NBBY) + blk; |
| 95 | } |
| 96 | |
| 97 | static inline u64 gfs2_rs_startblk(const struct gfs2_blkreserv *rs) |
| 98 | { |
| 99 | return gfs2_bi2rgd_blk(rs->rs_bi, rs->rs_biblk) + rs->rs_rgd->rd_data0; |
| 100 | } |
| 101 | |
David Teigland | b3b94fa | 2006-01-16 16:50:04 +0000 | [diff] [blame] | 102 | #endif /* __RGRP_DOT_H__ */ |