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_MINBLKS 32 22 #define RGRP_RSRV_ADDBLKS 64 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_brelse(struct gfs2_rgrpd *rgd); 39 extern void gfs2_rgrp_go_unlock(struct gfs2_holder *gh); 40 41 extern struct gfs2_alloc *gfs2_alloc_get(struct gfs2_inode *ip); 42 43 #define GFS2_AF_ORLOV 1 44 extern int gfs2_inplace_reserve(struct gfs2_inode *ip, 45 struct gfs2_alloc_parms *ap); 46 extern void gfs2_inplace_release(struct gfs2_inode *ip); 47 48 extern int gfs2_alloc_blocks(struct gfs2_inode *ip, u64 *bn, unsigned int *n, 49 bool dinode, u64 *generation); 50 51 extern int gfs2_rsqa_alloc(struct gfs2_inode *ip); 52 extern void gfs2_rs_deltree(struct gfs2_blkreserv *rs); 53 extern void gfs2_rsqa_delete(struct gfs2_inode *ip, atomic_t *wcount); 54 extern void __gfs2_free_blocks(struct gfs2_inode *ip, struct gfs2_rgrpd *rgd, 55 u64 bstart, u32 blen, int meta); 56 extern void gfs2_free_meta(struct gfs2_inode *ip, struct gfs2_rgrpd *rgd, 57 u64 bstart, u32 blen); 58 extern void gfs2_free_di(struct gfs2_rgrpd *rgd, struct gfs2_inode *ip); 59 extern void gfs2_unlink_di(struct inode *inode); 60 extern int gfs2_check_blk_type(struct gfs2_sbd *sdp, u64 no_addr, 61 unsigned int type); 62 63 struct gfs2_rgrp_list { 64 unsigned int rl_rgrps; 65 unsigned int rl_space; 66 struct gfs2_rgrpd **rl_rgd; 67 struct gfs2_holder *rl_ghs; 68 }; 69 70 extern void gfs2_rlist_add(struct gfs2_inode *ip, struct gfs2_rgrp_list *rlist, 71 u64 block); 72 extern void gfs2_rlist_alloc(struct gfs2_rgrp_list *rlist); 73 extern void gfs2_rlist_free(struct gfs2_rgrp_list *rlist); 74 extern u64 gfs2_ri_total(struct gfs2_sbd *sdp); 75 extern void gfs2_rgrp_dump(struct seq_file *seq, struct gfs2_glock *gl); 76 extern int gfs2_rgrp_send_discards(struct gfs2_sbd *sdp, u64 offset, 77 struct buffer_head *bh, 78 const struct gfs2_bitmap *bi, unsigned minlen, u64 *ptrimmed); 79 extern int gfs2_fitrim(struct file *filp, void __user *argp); 80 81 /* This is how to tell if a reservation is in the rgrp tree: */ 82 static inline bool gfs2_rs_active(const struct gfs2_blkreserv *rs) 83 { 84 return rs && !RB_EMPTY_NODE(&rs->rs_node); 85 } 86 87 static inline int rgrp_contains_block(struct gfs2_rgrpd *rgd, u64 block) 88 { 89 u64 first = rgd->rd_data0; 90 u64 last = first + rgd->rd_data; 91 return first <= block && block < last; 92 } 93 94 extern void check_and_update_goal(struct gfs2_inode *ip); 95 #endif /* __RGRP_DOT_H__ */ 96