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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>
66 lines
2.1 KiB
C
66 lines
2.1 KiB
C
/*
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* Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
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* Copyright (C) 2004-2006 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 __QUOTA_DOT_H__
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#define __QUOTA_DOT_H__
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#include <linux/list_lru.h>
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struct gfs2_inode;
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struct gfs2_sbd;
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#define NO_UID_QUOTA_CHANGE INVALID_UID
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#define NO_GID_QUOTA_CHANGE INVALID_GID
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extern int gfs2_qa_alloc(struct gfs2_inode *ip);
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extern void gfs2_qa_delete(struct gfs2_inode *ip, atomic_t *wcount);
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extern int gfs2_quota_hold(struct gfs2_inode *ip, kuid_t uid, kgid_t gid);
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extern void gfs2_quota_unhold(struct gfs2_inode *ip);
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extern int gfs2_quota_lock(struct gfs2_inode *ip, kuid_t uid, kgid_t gid);
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extern void gfs2_quota_unlock(struct gfs2_inode *ip);
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extern int gfs2_quota_check(struct gfs2_inode *ip, kuid_t uid, kgid_t gid,
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struct gfs2_alloc_parms *ap);
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extern void gfs2_quota_change(struct gfs2_inode *ip, s64 change,
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kuid_t uid, kgid_t gid);
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extern int gfs2_quota_sync(struct super_block *sb, int type);
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extern int gfs2_quota_refresh(struct gfs2_sbd *sdp, struct kqid qid);
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extern int gfs2_quota_init(struct gfs2_sbd *sdp);
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extern void gfs2_quota_cleanup(struct gfs2_sbd *sdp);
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extern int gfs2_quotad(void *data);
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extern void gfs2_wake_up_statfs(struct gfs2_sbd *sdp);
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static inline int gfs2_quota_lock_check(struct gfs2_inode *ip,
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struct gfs2_alloc_parms *ap)
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{
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struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
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int ret;
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if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF)
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return 0;
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ret = gfs2_quota_lock(ip, NO_UID_QUOTA_CHANGE, NO_GID_QUOTA_CHANGE);
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if (ret)
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return ret;
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if (sdp->sd_args.ar_quota != GFS2_QUOTA_ON)
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return 0;
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ret = gfs2_quota_check(ip, ip->i_inode.i_uid, ip->i_inode.i_gid, ap);
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if (ret)
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gfs2_quota_unlock(ip);
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return ret;
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}
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extern const struct quotactl_ops gfs2_quotactl_ops;
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extern struct shrinker gfs2_qd_shrinker;
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extern struct list_lru gfs2_qd_lru;
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extern void __init gfs2_quota_hash_init(void);
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#endif /* __QUOTA_DOT_H__ */
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