cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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quota.h (2075B)

      1/* SPDX-License-Identifier: GPL-2.0-only */
      2/*
      3 * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
      4 * Copyright (C) 2004-2006 Red Hat, Inc.  All rights reserved.
      5 */
      6
      7#ifndef __QUOTA_DOT_H__
      8#define __QUOTA_DOT_H__
      9
     10#include <linux/list_lru.h>
     11
     12struct gfs2_inode;
     13struct gfs2_sbd;
     14
     15#define NO_UID_QUOTA_CHANGE INVALID_UID
     16#define NO_GID_QUOTA_CHANGE INVALID_GID
     17
     18extern int gfs2_qa_get(struct gfs2_inode *ip);
     19extern void gfs2_qa_put(struct gfs2_inode *ip);
     20extern int gfs2_quota_hold(struct gfs2_inode *ip, kuid_t uid, kgid_t gid);
     21extern void gfs2_quota_unhold(struct gfs2_inode *ip);
     22
     23extern int gfs2_quota_lock(struct gfs2_inode *ip, kuid_t uid, kgid_t gid);
     24extern void gfs2_quota_unlock(struct gfs2_inode *ip);
     25
     26extern int gfs2_quota_check(struct gfs2_inode *ip, kuid_t uid, kgid_t gid,
     27			    struct gfs2_alloc_parms *ap);
     28extern void gfs2_quota_change(struct gfs2_inode *ip, s64 change,
     29			      kuid_t uid, kgid_t gid);
     30
     31extern int gfs2_quota_sync(struct super_block *sb, int type);
     32extern int gfs2_quota_refresh(struct gfs2_sbd *sdp, struct kqid qid);
     33
     34extern int gfs2_quota_init(struct gfs2_sbd *sdp);
     35extern void gfs2_quota_cleanup(struct gfs2_sbd *sdp);
     36extern int gfs2_quotad(void *data);
     37
     38extern void gfs2_wake_up_statfs(struct gfs2_sbd *sdp);
     39
     40static inline int gfs2_quota_lock_check(struct gfs2_inode *ip,
     41					struct gfs2_alloc_parms *ap)
     42{
     43	struct gfs2_sbd *sdp = GFS2_SB(&ip->i_inode);
     44	int ret;
     45
     46	ap->allowed = UINT_MAX; /* Assume we are permitted a whole lot */
     47	if (capable(CAP_SYS_RESOURCE) ||
     48	    sdp->sd_args.ar_quota == GFS2_QUOTA_OFF)
     49		return 0;
     50	ret = gfs2_quota_lock(ip, NO_UID_QUOTA_CHANGE, NO_GID_QUOTA_CHANGE);
     51	if (ret)
     52		return ret;
     53	if (sdp->sd_args.ar_quota != GFS2_QUOTA_ON)
     54		return 0;
     55	ret = gfs2_quota_check(ip, ip->i_inode.i_uid, ip->i_inode.i_gid, ap);
     56	if (ret)
     57		gfs2_quota_unlock(ip);
     58	return ret;
     59}
     60
     61extern const struct quotactl_ops gfs2_quotactl_ops;
     62extern struct shrinker gfs2_qd_shrinker;
     63extern struct list_lru gfs2_qd_lru;
     64extern void __init gfs2_quota_hash_init(void);
     65
     66#endif /* __QUOTA_DOT_H__ */