LXR linux/fs/xfs/xfs

   1// SPDX-License-Identifier: GPL-2.0
   2/*
   3 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
   4 * All Rights Reserved.
   5 */
   6#ifndef __XFS_QUOTA_H__
   7#define __XFS_QUOTA_H__
   8
   9#include "xfs_quota_defs.h"
  10
  11/*
  12 * Kernel only quota definitions and functions
  13 */
  14
  15struct xfs_trans;
  16
  17/*
  18 * This check is done typically without holding the inode lock;
  19 * that may seem racy, but it is harmless in the context that it is used.
  20 * The inode cannot go inactive as long a reference is kept, and
  21 * therefore if dquot(s) were attached, they'll stay consistent.
  22 * If, for example, the ownership of the inode changes while
  23 * we didn't have the inode locked, the appropriate dquot(s) will be
  24 * attached atomically.
  25 */
  26#define XFS_NOT_DQATTACHED(mp, ip) \
  27        ((XFS_IS_UQUOTA_ON(mp) && (ip)->i_udquot == NULL) || \
  28         (XFS_IS_GQUOTA_ON(mp) && (ip)->i_gdquot == NULL) || \
  29         (XFS_IS_PQUOTA_ON(mp) && (ip)->i_pdquot == NULL))
  30
  31#define XFS_QM_NEED_QUOTACHECK(mp) \
  32        ((XFS_IS_UQUOTA_ON(mp) && \
  33                (mp->m_sb.sb_qflags & XFS_UQUOTA_CHKD) == 0) || \
  34         (XFS_IS_GQUOTA_ON(mp) && \
  35                (mp->m_sb.sb_qflags & XFS_GQUOTA_CHKD) == 0) || \
  36         (XFS_IS_PQUOTA_ON(mp) && \
  37                (mp->m_sb.sb_qflags & XFS_PQUOTA_CHKD) == 0))
  38
  39static inline uint
  40xfs_quota_chkd_flag(
  41        uint            dqtype)
  42{
  43        switch (dqtype) {
  44        case XFS_DQ_USER:
  45                return XFS_UQUOTA_CHKD;
  46        case XFS_DQ_GROUP:
  47                return XFS_GQUOTA_CHKD;
  48        case XFS_DQ_PROJ:
  49                return XFS_PQUOTA_CHKD;
  50        default:
  51                return 0;
  52        }
  53}
  54
  55/*
  56 * The structure kept inside the xfs_trans_t keep track of dquot changes
  57 * within a transaction and apply them later.
  58 */
  59struct xfs_dqtrx {
  60        struct xfs_dquot *qt_dquot;       /* the dquot this refers to */
  61
  62        uint64_t        qt_blk_res;       /* blks reserved on a dquot */
  63        int64_t         qt_bcount_delta;  /* dquot blk count changes */
  64        int64_t         qt_delbcnt_delta; /* delayed dquot blk count changes */
  65
  66        uint64_t        qt_rtblk_res;     /* # blks reserved on a dquot */
  67        uint64_t        qt_rtblk_res_used;/* # blks used from reservation */
  68        int64_t         qt_rtbcount_delta;/* dquot realtime blk changes */
  69        int64_t         qt_delrtb_delta;  /* delayed RT blk count changes */
  70
  71        uint64_t        qt_ino_res;       /* inode reserved on a dquot */
  72        uint64_t        qt_ino_res_used;  /* inodes used from the reservation */
  73        int64_t         qt_icount_delta;  /* dquot inode count changes */
  74};
  75
  76#ifdef CONFIG_XFS_QUOTA
  77extern void xfs_trans_dup_dqinfo(struct xfs_trans *, struct xfs_trans *);
  78extern void xfs_trans_free_dqinfo(struct xfs_trans *);
  79extern void xfs_trans_mod_dquot_byino(struct xfs_trans *, struct xfs_inode *,
  80                uint, int64_t);
  81extern void xfs_trans_apply_dquot_deltas(struct xfs_trans *);
  82extern void xfs_trans_unreserve_and_mod_dquots(struct xfs_trans *);
  83extern int xfs_trans_reserve_quota_nblks(struct xfs_trans *,
  84                struct xfs_inode *, int64_t, long, uint);
  85extern int xfs_trans_reserve_quota_bydquots(struct xfs_trans *,
  86                struct xfs_mount *, struct xfs_dquot *,
  87                struct xfs_dquot *, struct xfs_dquot *, int64_t, long, uint);
  88
  89extern int xfs_qm_vop_dqalloc(struct xfs_inode *, xfs_dqid_t, xfs_dqid_t,
  90                prid_t, uint, struct xfs_dquot **, struct xfs_dquot **,
  91                struct xfs_dquot **);
  92extern void xfs_qm_vop_create_dqattach(struct xfs_trans *, struct xfs_inode *,
  93                struct xfs_dquot *, struct xfs_dquot *, struct xfs_dquot *);
  94extern int xfs_qm_vop_rename_dqattach(struct xfs_inode **);
  95extern struct xfs_dquot *xfs_qm_vop_chown(struct xfs_trans *,
  96                struct xfs_inode *, struct xfs_dquot **, struct xfs_dquot *);
  97extern int xfs_qm_vop_chown_reserve(struct xfs_trans *, struct xfs_inode *,
  98                struct xfs_dquot *, struct xfs_dquot *,
  99                struct xfs_dquot *, uint);
 100extern int xfs_qm_dqattach(struct xfs_inode *);
 101extern int xfs_qm_dqattach_locked(struct xfs_inode *ip, bool doalloc);
 102extern void xfs_qm_dqdetach(struct xfs_inode *);
 103extern void xfs_qm_dqrele(struct xfs_dquot *);
 104extern void xfs_qm_statvfs(struct xfs_inode *, struct kstatfs *);
 105extern int xfs_qm_newmount(struct xfs_mount *, uint *, uint *);
 106extern void xfs_qm_mount_quotas(struct xfs_mount *);
 107extern void xfs_qm_unmount(struct xfs_mount *);
 108extern void xfs_qm_unmount_quotas(struct xfs_mount *);
 109
 110#else
 111static inline int
 112xfs_qm_vop_dqalloc(struct xfs_inode *ip, xfs_dqid_t uid, xfs_dqid_t gid,
 113                prid_t prid, uint flags, struct xfs_dquot **udqp,
 114                struct xfs_dquot **gdqp, struct xfs_dquot **pdqp)
 115{
 116        *udqp = NULL;
 117        *gdqp = NULL;
 118        *pdqp = NULL;
 119        return 0;
 120}
 121#define xfs_trans_dup_dqinfo(tp, tp2)
 122#define xfs_trans_free_dqinfo(tp)
 123#define xfs_trans_mod_dquot_byino(tp, ip, fields, delta)
 124#define xfs_trans_apply_dquot_deltas(tp)
 125#define xfs_trans_unreserve_and_mod_dquots(tp)
 126static inline int xfs_trans_reserve_quota_nblks(struct xfs_trans *tp,
 127                struct xfs_inode *ip, int64_t nblks, long ninos, uint flags)
 128{
 129        return 0;
 130}
 131static inline int xfs_trans_reserve_quota_bydquots(struct xfs_trans *tp,
 132                struct xfs_mount *mp, struct xfs_dquot *udqp,
 133                struct xfs_dquot *gdqp, struct xfs_dquot *pdqp,
 134                int64_t nblks, long nions, uint flags)
 135{
 136        return 0;
 137}
 138#define xfs_qm_vop_create_dqattach(tp, ip, u, g, p)
 139#define xfs_qm_vop_rename_dqattach(it)                                  (0)
 140#define xfs_qm_vop_chown(tp, ip, old, new)                              (NULL)
 141#define xfs_qm_vop_chown_reserve(tp, ip, u, g, p, fl)                   (0)
 142#define xfs_qm_dqattach(ip)                                             (0)
 143#define xfs_qm_dqattach_locked(ip, fl)                                  (0)
 144#define xfs_qm_dqdetach(ip)
 145#define xfs_qm_dqrele(d)
 146#define xfs_qm_statvfs(ip, s)
 147#define xfs_qm_newmount(mp, a, b)                                       (0)
 148#define xfs_qm_mount_quotas(mp)
 149#define xfs_qm_unmount(mp)
 150#define xfs_qm_unmount_quotas(mp)
 151#endif /* CONFIG_XFS_QUOTA */
 152
 153#define xfs_trans_unreserve_quota_nblks(tp, ip, nblks, ninos, flags) \
 154        xfs_trans_reserve_quota_nblks(tp, ip, -(nblks), -(ninos), flags)
 155#define xfs_trans_reserve_quota(tp, mp, ud, gd, pd, nb, ni, f) \
 156        xfs_trans_reserve_quota_bydquots(tp, mp, ud, gd, pd, nb, ni, \
 157                                f | XFS_QMOPT_RES_REGBLKS)
 158
 159extern int xfs_mount_reset_sbqflags(struct xfs_mount *);
 160
 161#endif  /* __XFS_QUOTA_H__ */
 162