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 #define RGRP_RSRV_ADDBLKS 64 24 25 struct gfs2_rgrpd; 26 struct gfs2_sbd; 27 struct gfs2_holder; 28 29 extern void gfs2_rgrp_verify(struct gfs2_rgrpd *rgd); 30 31 extern struct gfs2_rgrpd *gfs2_blk2rgrpd(struct gfs2_sbd *sdp, u64 blk, bool exact); 32 extern struct gfs2_rgrpd *gfs2_rgrpd_get_first(struct gfs2_sbd *sdp); 33 extern struct gfs2_rgrpd *gfs2_rgrpd_get_next(struct gfs2_rgrpd *rgd); 34 35 extern void gfs2_clear_rgrpd(struct gfs2_sbd *sdp); 36 extern int gfs2_rindex_update(struct gfs2_sbd *sdp); 37 extern void gfs2_free_clones(struct gfs2_rgrpd *rgd); 38 extern int gfs2_rgrp_go_lock(struct gfs2_holder *gh); 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, const struct gfs2_alloc_parms *ap); 45 extern void gfs2_inplace_release(struct gfs2_inode *ip); 46 47 extern int gfs2_alloc_blocks(struct gfs2_inode *ip, u64 *bn, unsigned int *n, 48 bool dinode, u64 *generation); 49 50 extern int gfs2_rs_alloc(struct gfs2_inode *ip); 51 extern void gfs2_rs_deltree(struct gfs2_blkreserv *rs); 52 extern void gfs2_rs_delete(struct gfs2_inode *ip, atomic_t *wcount); 53 extern void __gfs2_free_blocks(struct gfs2_inode *ip, u64 bstart, u32 blen, int meta); 54 extern void gfs2_free_meta(struct gfs2_inode *ip, u64 bstart, u32 blen); 55 extern void gfs2_free_di(struct gfs2_rgrpd *rgd, struct gfs2_inode *ip); 56 extern void gfs2_unlink_di(struct inode *inode); 57 extern int gfs2_check_blk_type(struct gfs2_sbd *sdp, u64 no_addr, 58 unsigned int type); 59 60 struct 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 67 extern void gfs2_rlist_add(struct gfs2_inode *ip, struct gfs2_rgrp_list *rlist, 68 u64 block); 69 extern void gfs2_rlist_alloc(struct gfs2_rgrp_list *rlist, unsigned int state); 70 extern void gfs2_rlist_free(struct gfs2_rgrp_list *rlist); 71 extern u64 gfs2_ri_total(struct gfs2_sbd *sdp); 72 extern void gfs2_rgrp_dump(struct seq_file *seq, const struct gfs2_glock *gl); 73 extern 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); 76 extern int gfs2_fitrim(struct file *filp, void __user *argp); 77 78 /* This is how to tell if a reservation is in the rgrp tree: */ 79 static inline bool gfs2_rs_active(struct gfs2_blkreserv *rs) 80 { 81 return rs && !RB_EMPTY_NODE(&rs->rs_node); 82 } 83 84 extern void check_and_update_goal(struct gfs2_inode *ip); 85 #endif /* __RGRP_DOT_H__ */ 86