fs/xfs/xfs_quota.h

   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
  15 struct 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
  39 static inline uint
  40 xfs_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  */
  59 typedef struct xfs_dqtrx {
  60         struct xfs_dquot *qt_dquot;       /* the dquot this refers to */
  61         ulong           qt_blk_res;       /* blks reserved on a dquot */
  62         ulong           qt_ino_res;       /* inode reserved on a dquot */
  63         ulong           qt_ino_res_used;  /* inodes used from the reservation */
  64         long            qt_bcount_delta;  /* dquot blk count changes */
  65         long            qt_delbcnt_delta; /* delayed dquot blk count changes */
  66         long            qt_icount_delta;  /* dquot inode count changes */
  67         ulong           qt_rtblk_res;     /* # blks reserved on a dquot */
  68         ulong           qt_rtblk_res_used;/* # blks used from reservation */
  69         long            qt_rtbcount_delta;/* dquot realtime blk changes */
  70         long            qt_delrtb_delta;  /* delayed RT blk count changes */
  71 } xfs_dqtrx_t;
  72
  73 #ifdef CONFIG_XFS_QUOTA
  74 extern void xfs_trans_dup_dqinfo(struct xfs_trans *, struct xfs_trans *);
  75 extern void xfs_trans_free_dqinfo(struct xfs_trans *);
  76 extern void xfs_trans_mod_dquot_byino(struct xfs_trans *, struct xfs_inode *,
  77                 uint, long);
  78 extern void xfs_trans_apply_dquot_deltas(struct xfs_trans *);
  79 extern void xfs_trans_unreserve_and_mod_dquots(struct xfs_trans *);
  80 extern int xfs_trans_reserve_quota_nblks(struct xfs_trans *,
  81                 struct xfs_inode *, long, long, uint);
  82 extern int xfs_trans_reserve_quota_bydquots(struct xfs_trans *,
  83                 struct xfs_mount *, struct xfs_dquot *,
  84                 struct xfs_dquot *, struct xfs_dquot *, long, long, uint);
  85
  86 extern int xfs_qm_vop_dqalloc(struct xfs_inode *, xfs_dqid_t, xfs_dqid_t,
  87                 prid_t, uint, struct xfs_dquot **, struct xfs_dquot **,
  88                 struct xfs_dquot **);
  89 extern void xfs_qm_vop_create_dqattach(struct xfs_trans *, struct xfs_inode *,
  90                 struct xfs_dquot *, struct xfs_dquot *, struct xfs_dquot *);
  91 extern int xfs_qm_vop_rename_dqattach(struct xfs_inode **);
  92 extern struct xfs_dquot *xfs_qm_vop_chown(struct xfs_trans *,
  93                 struct xfs_inode *, struct xfs_dquot **, struct xfs_dquot *);
  94 extern int xfs_qm_vop_chown_reserve(struct xfs_trans *, struct xfs_inode *,
  95                 struct xfs_dquot *, struct xfs_dquot *,
  96                 struct xfs_dquot *, uint);
  97 extern int xfs_qm_dqattach(struct xfs_inode *);
  98 extern int xfs_qm_dqattach_locked(struct xfs_inode *ip, bool doalloc);
  99 extern void xfs_qm_dqdetach(struct xfs_inode *);
 100 extern void xfs_qm_dqrele(struct xfs_dquot *);
 101 extern void xfs_qm_statvfs(struct xfs_inode *, struct kstatfs *);
 102 extern int xfs_qm_newmount(struct xfs_mount *, uint *, uint *);
 103 extern void xfs_qm_mount_quotas(struct xfs_mount *);
 104 extern void xfs_qm_unmount(struct xfs_mount *);
 105 extern void xfs_qm_unmount_quotas(struct xfs_mount *);
 106
 107 #else
 108 static inline int
 109 xfs_qm_vop_dqalloc(struct xfs_inode *ip, xfs_dqid_t uid, xfs_dqid_t gid,
 110                 prid_t prid, uint flags, struct xfs_dquot **udqp,
 111                 struct xfs_dquot **gdqp, struct xfs_dquot **pdqp)
 112 {
 113         *udqp = NULL;
 114         *gdqp = NULL;
 115         *pdqp = NULL;
 116         return 0;
 117 }
 118 #define xfs_trans_dup_dqinfo(tp, tp2)
 119 #define xfs_trans_free_dqinfo(tp)
 120 #define xfs_trans_mod_dquot_byino(tp, ip, fields, delta)
 121 #define xfs_trans_apply_dquot_deltas(tp)
 122 #define xfs_trans_unreserve_and_mod_dquots(tp)
 123 static inline int xfs_trans_reserve_quota_nblks(struct xfs_trans *tp,
 124                 struct xfs_inode *ip, long nblks, long ninos, uint flags)
 125 {
 126         return 0;
 127 }
 128 static inline int xfs_trans_reserve_quota_bydquots(struct xfs_trans *tp,
 129                 struct xfs_mount *mp, struct xfs_dquot *udqp,
 130                 struct xfs_dquot *gdqp, struct xfs_dquot *pdqp,
 131                 long nblks, long nions, uint flags)
 132 {
 133         return 0;
 134 }
 135 #define xfs_qm_vop_create_dqattach(tp, ip, u, g, p)
 136 #define xfs_qm_vop_rename_dqattach(it)                                  (0)
 137 #define xfs_qm_vop_chown(tp, ip, old, new)                              (NULL)
 138 #define xfs_qm_vop_chown_reserve(tp, ip, u, g, p, fl)                   (0)
 139 #define xfs_qm_dqattach(ip)                                             (0)
 140 #define xfs_qm_dqattach_locked(ip, fl)                                  (0)
 141 #define xfs_qm_dqdetach(ip)
 142 #define xfs_qm_dqrele(d)
 143 #define xfs_qm_statvfs(ip, s)
 144 #define xfs_qm_newmount(mp, a, b)                                       (0)
 145 #define xfs_qm_mount_quotas(mp)
 146 #define xfs_qm_unmount(mp)
 147 #define xfs_qm_unmount_quotas(mp)
 148 #endif /* CONFIG_XFS_QUOTA */
 149
 150 #define xfs_trans_unreserve_quota_nblks(tp, ip, nblks, ninos, flags) \
 151         xfs_trans_reserve_quota_nblks(tp, ip, -(nblks), -(ninos), flags)
 152 #define xfs_trans_reserve_quota(tp, mp, ud, gd, pd, nb, ni, f) \
 153         xfs_trans_reserve_quota_bydquots(tp, mp, ud, gd, pd, nb, ni, \
 154                                 f | XFS_QMOPT_RES_REGBLKS)
 155
 156 extern int xfs_mount_reset_sbqflags(struct xfs_mount *);
 157
 158 #endif  /* __XFS_QUOTA_H__ */