forked from luck/tmp_suning_uos_patched
2147dbfd05
By using the generic list_lru code, we can now separate the per sb quota list locking from the lru locking. The lru lock is made into the inner-most lock. As a result of this new lock order, we may occasionally see items on the per-sb quota list which are "dead" so that the two places where we traverse that list are updated to take account of that. As a result of this patch, the gfs2 quota shrinker is now NUMA zone aware, and we are also laying the foundations for further improvments in due course. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com> Signed-off-by: Abhijith Das <adas@redhat.com> Tested-by: Abhijith Das <adas@redhat.com> Cc: Dave Chinner <dchinner@redhat.com>
62 lines
1.9 KiB
C
62 lines
1.9 KiB
C
/*
|
|
* Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
|
|
* Copyright (C) 2004-2006 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 __QUOTA_DOT_H__
|
|
#define __QUOTA_DOT_H__
|
|
|
|
#include <linux/list_lru.h>
|
|
|
|
struct gfs2_inode;
|
|
struct gfs2_sbd;
|
|
|
|
#define NO_UID_QUOTA_CHANGE INVALID_UID
|
|
#define NO_GID_QUOTA_CHANGE INVALID_GID
|
|
|
|
extern int gfs2_quota_hold(struct gfs2_inode *ip, kuid_t uid, kgid_t gid);
|
|
extern void gfs2_quota_unhold(struct gfs2_inode *ip);
|
|
|
|
extern int gfs2_quota_lock(struct gfs2_inode *ip, kuid_t uid, kgid_t gid);
|
|
extern void gfs2_quota_unlock(struct gfs2_inode *ip);
|
|
|
|
extern int gfs2_quota_check(struct gfs2_inode *ip, kuid_t uid, kgid_t gid);
|
|
extern void gfs2_quota_change(struct gfs2_inode *ip, s64 change,
|
|
kuid_t uid, kgid_t gid);
|
|
|
|
extern int gfs2_quota_sync(struct super_block *sb, int type);
|
|
extern int gfs2_quota_refresh(struct gfs2_sbd *sdp, struct kqid qid);
|
|
|
|
extern int gfs2_quota_init(struct gfs2_sbd *sdp);
|
|
extern void gfs2_quota_cleanup(struct gfs2_sbd *sdp);
|
|
extern int gfs2_quotad(void *data);
|
|
|
|
extern void gfs2_wake_up_statfs(struct gfs2_sbd *sdp);
|
|
|
|
static inline int gfs2_quota_lock_check(struct gfs2_inode *ip)
|
|
{
|
|
struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
|
|
int ret;
|
|
if (sdp->sd_args.ar_quota == GFS2_QUOTA_OFF)
|
|
return 0;
|
|
ret = gfs2_quota_lock(ip, NO_UID_QUOTA_CHANGE, NO_GID_QUOTA_CHANGE);
|
|
if (ret)
|
|
return ret;
|
|
if (sdp->sd_args.ar_quota != GFS2_QUOTA_ON)
|
|
return 0;
|
|
ret = gfs2_quota_check(ip, ip->i_inode.i_uid, ip->i_inode.i_gid);
|
|
if (ret)
|
|
gfs2_quota_unlock(ip);
|
|
return ret;
|
|
}
|
|
|
|
extern const struct quotactl_ops gfs2_quotactl_ops;
|
|
extern struct shrinker gfs2_qd_shrinker;
|
|
extern struct list_lru gfs2_qd_lru;
|
|
|
|
#endif /* __QUOTA_DOT_H__ */
|