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 struct xfs_buf;
  17
  18 /*
  19  * This check is done typically without holding the inode lock;
  20  * that may seem racy, but it is harmless in the context that it is used.
  21  * The inode cannot go inactive as long a reference is kept, and
  22  * therefore if dquot(s) were attached, they'll stay consistent.
  23  * If, for example, the ownership of the inode changes while
  24  * we didn't have the inode locked, the appropriate dquot(s) will be
  25  * attached atomically.
  26  */
  27 #define XFS_NOT_DQATTACHED(mp, ip) \
  28         ((XFS_IS_UQUOTA_ON(mp) && (ip)->i_udquot == NULL) || \
  29          (XFS_IS_GQUOTA_ON(mp) && (ip)->i_gdquot == NULL) || \
  30          (XFS_IS_PQUOTA_ON(mp) && (ip)->i_pdquot == NULL))
  31
  32 #define XFS_QM_NEED_QUOTACHECK(mp) \
  33         ((XFS_IS_UQUOTA_ON(mp) && \
  34                 (mp->m_sb.sb_qflags & XFS_UQUOTA_CHKD) == 0) || \
  35          (XFS_IS_GQUOTA_ON(mp) && \
  36                 (mp->m_sb.sb_qflags & XFS_GQUOTA_CHKD) == 0) || \
  37          (XFS_IS_PQUOTA_ON(mp) && \
  38                 (mp->m_sb.sb_qflags & XFS_PQUOTA_CHKD) == 0))
  39
  40 static inline uint
  41 xfs_quota_chkd_flag(
  42         xfs_dqtype_t            type)
  43 {
  44         switch (type) {
  45         case XFS_DQTYPE_USER:
  46                 return XFS_UQUOTA_CHKD;
  47         case XFS_DQTYPE_GROUP:
  48                 return XFS_GQUOTA_CHKD;
  49         case XFS_DQTYPE_PROJ:
  50                 return XFS_PQUOTA_CHKD;
  51         default:
  52                 return 0;
  53         }
  54 }
  55
  56 /*
  57  * The structure kept inside the xfs_trans_t keep track of dquot changes
  58  * within a transaction and apply them later.
  59  */
  60 struct xfs_dqtrx {
  61         struct xfs_dquot *qt_dquot;       /* the dquot this refers to */
  62
  63         uint64_t        qt_blk_res;       /* blks reserved on a dquot */
  64         int64_t         qt_bcount_delta;  /* dquot blk count changes */
  65         int64_t         qt_delbcnt_delta; /* delayed dquot blk count changes */
  66
  67         uint64_t        qt_rtblk_res;     /* # blks reserved on a dquot */
  68         uint64_t        qt_rtblk_res_used;/* # blks used from reservation */
  69         int64_t         qt_rtbcount_delta;/* dquot realtime blk changes */
  70         int64_t         qt_delrtb_delta;  /* delayed RT blk count changes */
  71
  72         uint64_t        qt_ino_res;       /* inode reserved on a dquot */
  73         uint64_t        qt_ino_res_used;  /* inodes used from the reservation */
  74         int64_t         qt_icount_delta;  /* dquot inode count changes */
  75 };
  76
  77 #ifdef CONFIG_XFS_QUOTA
  78 extern void xfs_trans_dup_dqinfo(struct xfs_trans *, struct xfs_trans *);
  79 extern void xfs_trans_free_dqinfo(struct xfs_trans *);
  80 extern void xfs_trans_mod_dquot_byino(struct xfs_trans *, struct xfs_inode *,
  81                 uint, int64_t);
  82 extern void xfs_trans_apply_dquot_deltas(struct xfs_trans *);
  83 extern void xfs_trans_unreserve_and_mod_dquots(struct xfs_trans *);
  84 int xfs_trans_reserve_quota_nblks(struct xfs_trans *tp, struct xfs_inode *ip,
  85                 int64_t dblocks, int64_t rblocks, bool force);
  86 extern int xfs_trans_reserve_quota_bydquots(struct xfs_trans *,
  87                 struct xfs_mount *, struct xfs_dquot *,
  88                 struct xfs_dquot *, struct xfs_dquot *, int64_t, long, uint);
  89 int xfs_trans_reserve_quota_icreate(struct xfs_trans *tp,
  90                 struct xfs_dquot *udqp, struct xfs_dquot *gdqp,
  91                 struct xfs_dquot *pdqp, int64_t dblocks);
  92
  93 extern int xfs_qm_vop_dqalloc(struct xfs_inode *, kuid_t, kgid_t,
  94                 prid_t, uint, struct xfs_dquot **, struct xfs_dquot **,
  95                 struct xfs_dquot **);
  96 extern void xfs_qm_vop_create_dqattach(struct xfs_trans *, struct xfs_inode *,
  97                 struct xfs_dquot *, struct xfs_dquot *, struct xfs_dquot *);
  98 extern int xfs_qm_vop_rename_dqattach(struct xfs_inode **);
  99 extern struct xfs_dquot *xfs_qm_vop_chown(struct xfs_trans *,
 100                 struct xfs_inode *, struct xfs_dquot **, struct xfs_dquot *);
 101 extern int xfs_qm_dqattach(struct xfs_inode *);
 102 extern int xfs_qm_dqattach_locked(struct xfs_inode *ip, bool doalloc);
 103 extern void xfs_qm_dqdetach(struct xfs_inode *);
 104 extern void xfs_qm_dqrele(struct xfs_dquot *);
 105 extern void xfs_qm_statvfs(struct xfs_inode *, struct kstatfs *);
 106 extern int xfs_qm_newmount(struct xfs_mount *, uint *, uint *);
 107 extern void xfs_qm_mount_quotas(struct xfs_mount *);
 108 extern void xfs_qm_unmount(struct xfs_mount *);
 109 extern void xfs_qm_unmount_quotas(struct xfs_mount *);
 110
 111 static inline int
 112 xfs_quota_reserve_blkres(struct xfs_inode *ip, int64_t blocks)
 113 {
 114         return xfs_trans_reserve_quota_nblks(NULL, ip, blocks, 0, false);
 115 }
 116 bool xfs_inode_near_dquot_enforcement(struct xfs_inode *ip, xfs_dqtype_t type);
 117 #else
 118 static inline int
 119 xfs_qm_vop_dqalloc(struct xfs_inode *ip, kuid_t kuid, kgid_t kgid,
 120                 prid_t prid, uint flags, struct xfs_dquot **udqp,
 121                 struct xfs_dquot **gdqp, struct xfs_dquot **pdqp)
 122 {
 123         *udqp = NULL;
 124         *gdqp = NULL;
 125         *pdqp = NULL;
 126         return 0;
 127 }
 128 #define xfs_trans_dup_dqinfo(tp, tp2)
 129 #define xfs_trans_free_dqinfo(tp)
 130 #define xfs_trans_mod_dquot_byino(tp, ip, fields, delta) do { } while (0)
 131 #define xfs_trans_apply_dquot_deltas(tp)
 132 #define xfs_trans_unreserve_and_mod_dquots(tp)
 133 static inline int xfs_trans_reserve_quota_nblks(struct xfs_trans *tp,
 134                 struct xfs_inode *ip, int64_t dblocks, int64_t rblocks,
 135                 bool force)
 136 {
 137         return 0;
 138 }
 139 static inline int xfs_trans_reserve_quota_bydquots(struct xfs_trans *tp,
 140                 struct xfs_mount *mp, struct xfs_dquot *udqp,
 141                 struct xfs_dquot *gdqp, struct xfs_dquot *pdqp,
 142                 int64_t nblks, long nions, uint flags)
 143 {
 144         return 0;
 145 }
 146
 147 static inline int
 148 xfs_quota_reserve_blkres(struct xfs_inode *ip, int64_t blocks)
 149 {
 150         return 0;
 151 }
 152
 153 static inline int
 154 xfs_trans_reserve_quota_icreate(struct xfs_trans *tp, struct xfs_dquot *udqp,
 155                 struct xfs_dquot *gdqp, struct xfs_dquot *pdqp, int64_t dblocks)
 156 {
 157         return 0;
 158 }
 159
 160 #define xfs_qm_vop_create_dqattach(tp, ip, u, g, p)
 161 #define xfs_qm_vop_rename_dqattach(it)                                  (0)
 162 #define xfs_qm_vop_chown(tp, ip, old, new)                              (NULL)
 163 #define xfs_qm_dqattach(ip)                                             (0)
 164 #define xfs_qm_dqattach_locked(ip, fl)                                  (0)
 165 #define xfs_qm_dqdetach(ip)
 166 #define xfs_qm_dqrele(d)                        do { (d) = (d); } while(0)
 167 #define xfs_qm_statvfs(ip, s)                   do { } while(0)
 168 #define xfs_qm_newmount(mp, a, b)                                       (0)
 169 #define xfs_qm_mount_quotas(mp)
 170 #define xfs_qm_unmount(mp)
 171 #define xfs_qm_unmount_quotas(mp)
 172 #define xfs_inode_near_dquot_enforcement(ip, type)                      (false)
 173 #endif /* CONFIG_XFS_QUOTA */
 174
 175 static inline int
 176 xfs_quota_unreserve_blkres(struct xfs_inode *ip, int64_t blocks)
 177 {
 178         return xfs_quota_reserve_blkres(ip, -blocks);
 179 }
 180
 181 extern int xfs_mount_reset_sbqflags(struct xfs_mount *);
 182
 183 #endif  /* __XFS_QUOTA_H__ */