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Diffstat (limited to 'kernel/fs/gfs2/rgrp.h')
| -rw-r--r-- | kernel/fs/gfs2/rgrp.h | 86 |
1 files changed, 86 insertions, 0 deletions
diff --git a/kernel/fs/gfs2/rgrp.h b/kernel/fs/gfs2/rgrp.h new file mode 100644 index 000000000..68972ecfb --- /dev/null +++ b/kernel/fs/gfs2/rgrp.h @@ -0,0 +1,86 @@ +/* + * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. + * Copyright (C) 2004-2008 Red Hat, Inc. All rights reserved. + * + * This copyrighted material is made available to anyone wishing to use, + * modify, copy, or redistribute it subject to the terms and conditions + * of the GNU General Public License version 2. + */ + +#ifndef __RGRP_DOT_H__ +#define __RGRP_DOT_H__ + +#include <linux/slab.h> +#include <linux/uaccess.h> + +/* Since each block in the file system is represented by two bits in the + * bitmap, one 64-bit word in the bitmap will represent 32 blocks. + * By reserving 32 blocks at a time, we can optimize / shortcut how we search + * through the bitmaps by looking a word at a time. + */ +#define RGRP_RSRV_MINBYTES 8 +#define RGRP_RSRV_MINBLKS ((u32)(RGRP_RSRV_MINBYTES * GFS2_NBBY)) +#define RGRP_RSRV_ADDBLKS 64 + +struct gfs2_rgrpd; +struct gfs2_sbd; +struct gfs2_holder; + +extern void gfs2_rgrp_verify(struct gfs2_rgrpd *rgd); + +extern struct gfs2_rgrpd *gfs2_blk2rgrpd(struct gfs2_sbd *sdp, u64 blk, bool exact); +extern struct gfs2_rgrpd *gfs2_rgrpd_get_first(struct gfs2_sbd *sdp); +extern struct gfs2_rgrpd *gfs2_rgrpd_get_next(struct gfs2_rgrpd *rgd); + +extern void gfs2_clear_rgrpd(struct gfs2_sbd *sdp); +extern int gfs2_rindex_update(struct gfs2_sbd *sdp); +extern void gfs2_free_clones(struct gfs2_rgrpd *rgd); +extern int gfs2_rgrp_go_lock(struct gfs2_holder *gh); +extern void gfs2_rgrp_go_unlock(struct gfs2_holder *gh); + +extern struct gfs2_alloc *gfs2_alloc_get(struct gfs2_inode *ip); + +#define GFS2_AF_ORLOV 1 +extern int gfs2_inplace_reserve(struct gfs2_inode *ip, + struct gfs2_alloc_parms *ap); +extern void gfs2_inplace_release(struct gfs2_inode *ip); + +extern int gfs2_alloc_blocks(struct gfs2_inode *ip, u64 *bn, unsigned int *n, + bool dinode, u64 *generation); + +extern int gfs2_rs_alloc(struct gfs2_inode *ip); +extern void gfs2_rs_deltree(struct gfs2_blkreserv *rs); +extern void gfs2_rs_delete(struct gfs2_inode *ip, atomic_t *wcount); +extern void __gfs2_free_blocks(struct gfs2_inode *ip, u64 bstart, u32 blen, int meta); +extern void gfs2_free_meta(struct gfs2_inode *ip, u64 bstart, u32 blen); +extern void gfs2_free_di(struct gfs2_rgrpd *rgd, struct gfs2_inode *ip); +extern void gfs2_unlink_di(struct inode *inode); +extern int gfs2_check_blk_type(struct gfs2_sbd *sdp, u64 no_addr, + unsigned int type); + +struct gfs2_rgrp_list { + unsigned int rl_rgrps; + unsigned int rl_space; + struct gfs2_rgrpd **rl_rgd; + struct gfs2_holder *rl_ghs; +}; + +extern void gfs2_rlist_add(struct gfs2_inode *ip, struct gfs2_rgrp_list *rlist, + u64 block); +extern void gfs2_rlist_alloc(struct gfs2_rgrp_list *rlist, unsigned int state); +extern void gfs2_rlist_free(struct gfs2_rgrp_list *rlist); +extern u64 gfs2_ri_total(struct gfs2_sbd *sdp); +extern void gfs2_rgrp_dump(struct seq_file *seq, const struct gfs2_glock *gl); +extern int gfs2_rgrp_send_discards(struct gfs2_sbd *sdp, u64 offset, + struct buffer_head *bh, + const struct gfs2_bitmap *bi, unsigned minlen, u64 *ptrimmed); +extern int gfs2_fitrim(struct file *filp, void __user *argp); + +/* This is how to tell if a reservation is in the rgrp tree: */ +static inline bool gfs2_rs_active(struct gfs2_blkreserv *rs) +{ + return rs && !RB_EMPTY_NODE(&rs->rs_node); +} + +extern void check_and_update_goal(struct gfs2_inode *ip); +#endif /* __RGRP_DOT_H__ */ |