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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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a097dc7e24
Before this patch, multi-block reservation structures were allocated from a special slab. This patch folds the structure into the gfs2_inode structure. The disadvantage is that the gfs2_inode needs more memory, even when a file is opened read-only. The advantages are: (a) we don't need the special slab and the extra time it takes to allocate and deallocate from it. (b) we no longer need to worry that the structure exists for things like quota management. (c) This also allows us to remove the calls to get_write_access and put_write_access since we know the structure will exist. Signed-off-by: Bob Peterson <rpeterso@redhat.com>
88 lines
3.3 KiB
C
88 lines
3.3 KiB
C
/*
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* Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
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* Copyright (C) 2004-2008 Red Hat, Inc. All rights reserved.
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*
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* This copyrighted material is made available to anyone wishing to use,
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* modify, copy, or redistribute it subject to the terms and conditions
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* of the GNU General Public License version 2.
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*/
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#ifndef __RGRP_DOT_H__
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#define __RGRP_DOT_H__
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#include <linux/slab.h>
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#include <linux/uaccess.h>
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/* Since each block in the file system is represented by two bits in the
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* bitmap, one 64-bit word in the bitmap will represent 32 blocks.
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* By reserving 32 blocks at a time, we can optimize / shortcut how we search
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* through the bitmaps by looking a word at a time.
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*/
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#define RGRP_RSRV_MINBYTES 8
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#define RGRP_RSRV_MINBLKS ((u32)(RGRP_RSRV_MINBYTES * GFS2_NBBY))
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#define RGRP_RSRV_ADDBLKS 64
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struct gfs2_rgrpd;
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struct gfs2_sbd;
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struct gfs2_holder;
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extern void gfs2_rgrp_verify(struct gfs2_rgrpd *rgd);
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extern struct gfs2_rgrpd *gfs2_blk2rgrpd(struct gfs2_sbd *sdp, u64 blk, bool exact);
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extern struct gfs2_rgrpd *gfs2_rgrpd_get_first(struct gfs2_sbd *sdp);
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extern struct gfs2_rgrpd *gfs2_rgrpd_get_next(struct gfs2_rgrpd *rgd);
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extern void gfs2_clear_rgrpd(struct gfs2_sbd *sdp);
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extern int gfs2_rindex_update(struct gfs2_sbd *sdp);
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extern void gfs2_free_clones(struct gfs2_rgrpd *rgd);
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extern int gfs2_rgrp_go_lock(struct gfs2_holder *gh);
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extern void gfs2_rgrp_brelse(struct gfs2_rgrpd *rgd);
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extern void gfs2_rgrp_go_unlock(struct gfs2_holder *gh);
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extern struct gfs2_alloc *gfs2_alloc_get(struct gfs2_inode *ip);
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#define GFS2_AF_ORLOV 1
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extern int gfs2_inplace_reserve(struct gfs2_inode *ip,
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struct gfs2_alloc_parms *ap);
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extern void gfs2_inplace_release(struct gfs2_inode *ip);
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extern int gfs2_alloc_blocks(struct gfs2_inode *ip, u64 *bn, unsigned int *n,
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bool dinode, u64 *generation);
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extern int gfs2_rsqa_alloc(struct gfs2_inode *ip);
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extern void gfs2_rs_deltree(struct gfs2_blkreserv *rs);
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extern void gfs2_rsqa_delete(struct gfs2_inode *ip, atomic_t *wcount);
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extern void __gfs2_free_blocks(struct gfs2_inode *ip, u64 bstart, u32 blen, int meta);
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extern void gfs2_free_meta(struct gfs2_inode *ip, u64 bstart, u32 blen);
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extern void gfs2_free_di(struct gfs2_rgrpd *rgd, struct gfs2_inode *ip);
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extern void gfs2_unlink_di(struct inode *inode);
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extern int gfs2_check_blk_type(struct gfs2_sbd *sdp, u64 no_addr,
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unsigned int type);
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struct gfs2_rgrp_list {
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unsigned int rl_rgrps;
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unsigned int rl_space;
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struct gfs2_rgrpd **rl_rgd;
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struct gfs2_holder *rl_ghs;
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};
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extern void gfs2_rlist_add(struct gfs2_inode *ip, struct gfs2_rgrp_list *rlist,
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u64 block);
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extern void gfs2_rlist_alloc(struct gfs2_rgrp_list *rlist, unsigned int state);
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extern void gfs2_rlist_free(struct gfs2_rgrp_list *rlist);
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extern u64 gfs2_ri_total(struct gfs2_sbd *sdp);
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extern void gfs2_rgrp_dump(struct seq_file *seq, const struct gfs2_glock *gl);
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extern int gfs2_rgrp_send_discards(struct gfs2_sbd *sdp, u64 offset,
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struct buffer_head *bh,
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const struct gfs2_bitmap *bi, unsigned minlen, u64 *ptrimmed);
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extern int gfs2_fitrim(struct file *filp, void __user *argp);
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/* This is how to tell if a reservation is in the rgrp tree: */
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static inline bool gfs2_rs_active(const struct gfs2_blkreserv *rs)
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{
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return rs && !RB_EMPTY_NODE(&rs->rs_node);
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}
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extern void check_and_update_goal(struct gfs2_inode *ip);
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#endif /* __RGRP_DOT_H__ */
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