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 24 struct gfs2_rgrpd; 25 struct gfs2_sbd; 26 struct gfs2_holder; 27 28 extern void gfs2_rgrp_verify(struct gfs2_rgrpd *rgd); 29 30 extern struct gfs2_rgrpd *gfs2_blk2rgrpd(struct gfs2_sbd *sdp, u64 blk, bool exact); 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); 33 34 extern void gfs2_clear_rgrpd(struct gfs2_sbd *sdp); 35 extern int gfs2_rindex_update(struct gfs2_sbd *sdp); 36 extern void gfs2_free_clones(struct gfs2_rgrpd *rgd); 37 extern int gfs2_rgrp_go_lock(struct gfs2_holder *gh); 38 extern void gfs2_rgrp_go_unlock(struct gfs2_holder *gh); 39 40 extern struct gfs2_alloc *gfs2_alloc_get(struct gfs2_inode *ip); 41 42 extern int gfs2_inplace_reserve(struct gfs2_inode *ip, u32 requested); 43 extern void gfs2_inplace_release(struct gfs2_inode *ip); 44 45 extern int gfs2_alloc_blocks(struct gfs2_inode *ip, u64 *bn, unsigned int *n, 46 bool dinode, u64 *generation); 47 48 extern int gfs2_rs_alloc(struct gfs2_inode *ip); 49 extern void gfs2_rs_deltree(struct gfs2_blkreserv *rs); 50 extern void gfs2_rs_delete(struct gfs2_inode *ip); 51 extern void __gfs2_free_blocks(struct gfs2_inode *ip, u64 bstart, u32 blen, int meta); 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); 55 extern int gfs2_check_blk_type(struct gfs2_sbd *sdp, u64 no_addr, 56 unsigned int type); 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 65 extern void gfs2_rlist_add(struct gfs2_inode *ip, struct gfs2_rgrp_list *rlist, 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); 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); 75 76 /* This is how to tell if a multi-block reservation is "inplace" reserved: */ 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 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 } 101 102 #endif /* __RGRP_DOT_H__ */ 103