1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. 4 * Copyright (C) 2004-2008 Red Hat, Inc. All rights reserved. 5 */ 6 7 #ifndef __RGRP_DOT_H__ 8 #define __RGRP_DOT_H__ 9 10 #include <linux/slab.h> 11 #include <linux/uaccess.h> 12 13 /* Since each block in the file system is represented by two bits in the 14 * bitmap, one 64-bit word in the bitmap will represent 32 blocks. 15 * By reserving 32 blocks at a time, we can optimize / shortcut how we search 16 * through the bitmaps by looking a word at a time. 17 */ 18 #define RGRP_RSRV_MINBLKS 32 19 #define RGRP_RSRV_ADDBLKS 64 20 21 struct gfs2_rgrpd; 22 struct gfs2_sbd; 23 struct gfs2_holder; 24 25 extern void gfs2_rgrp_verify(struct gfs2_rgrpd *rgd); 26 27 extern struct gfs2_rgrpd *gfs2_blk2rgrpd(struct gfs2_sbd *sdp, u64 blk, bool exact); 28 extern struct gfs2_rgrpd *gfs2_rgrpd_get_first(struct gfs2_sbd *sdp); 29 extern struct gfs2_rgrpd *gfs2_rgrpd_get_next(struct gfs2_rgrpd *rgd); 30 31 extern void gfs2_clear_rgrpd(struct gfs2_sbd *sdp); 32 extern int gfs2_rindex_update(struct gfs2_sbd *sdp); 33 extern void gfs2_free_clones(struct gfs2_rgrpd *rgd); 34 extern int gfs2_rgrp_go_instantiate(struct gfs2_holder *gh); 35 extern void gfs2_rgrp_brelse(struct gfs2_rgrpd *rgd); 36 37 extern struct gfs2_alloc *gfs2_alloc_get(struct gfs2_inode *ip); 38 39 #define GFS2_AF_ORLOV 1 40 extern int gfs2_inplace_reserve(struct gfs2_inode *ip, 41 struct gfs2_alloc_parms *ap); 42 extern void gfs2_inplace_release(struct gfs2_inode *ip); 43 44 extern int gfs2_alloc_blocks(struct gfs2_inode *ip, u64 *bn, unsigned int *n, 45 bool dinode, u64 *generation); 46 47 extern void gfs2_rs_deltree(struct gfs2_blkreserv *rs); 48 extern void gfs2_rs_delete(struct gfs2_inode *ip, atomic_t *wcount); 49 extern void __gfs2_free_blocks(struct gfs2_inode *ip, struct gfs2_rgrpd *rgd, 50 u64 bstart, u32 blen, int meta); 51 extern void gfs2_free_meta(struct gfs2_inode *ip, struct gfs2_rgrpd *rgd, 52 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); 68 extern void gfs2_rlist_free(struct gfs2_rgrp_list *rlist); 69 extern u64 gfs2_ri_total(struct gfs2_sbd *sdp); 70 extern void gfs2_rgrp_dump(struct seq_file *seq, struct gfs2_rgrpd *rgd, 71 const char *fs_id_buf); 72 extern int gfs2_rgrp_send_discards(struct gfs2_sbd *sdp, u64 offset, 73 struct buffer_head *bh, 74 const struct gfs2_bitmap *bi, unsigned minlen, u64 *ptrimmed); 75 extern int gfs2_fitrim(struct file *filp, void __user *argp); 76 77 /* This is how to tell if a reservation is in the rgrp tree: */ 78 static inline bool gfs2_rs_active(const struct gfs2_blkreserv *rs) 79 { 80 return !RB_EMPTY_NODE(&rs->rs_node); 81 } 82 83 static inline int rgrp_contains_block(struct gfs2_rgrpd *rgd, u64 block) 84 { 85 u64 first = rgd->rd_data0; 86 u64 last = first + rgd->rd_data; 87 return first <= block && block < last; 88 } 89 90 extern void check_and_update_goal(struct gfs2_inode *ip); 91 92 extern void rgrp_lock_local(struct gfs2_rgrpd *rgd); 93 extern void rgrp_unlock_local(struct gfs2_rgrpd *rgd); 94 95 #endif /* __RGRP_DOT_H__ */ 96