fs/xfs/libxfs/xfs_quota_defs.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_DEFS_H__
   7 #define __XFS_QUOTA_DEFS_H__
   8
   9 /*
  10  * Quota definitions shared between user and kernel source trees.
  11  */
  12
  13 /*
  14  * Even though users may not have quota limits occupying all 64-bits,
  15  * they may need 64-bit accounting. Hence, 64-bit quota-counters,
  16  * and quota-limits. This is a waste in the common case, but hey ...
  17  */
  18 typedef uint64_t        xfs_qcnt_t;
  19 typedef uint16_t        xfs_qwarncnt_t;
  20
  21 /*
  22  * flags for q_flags field in the dquot.
  23  */
  24 #define XFS_DQ_USER             0x0001          /* a user quota */
  25 #define XFS_DQ_PROJ             0x0002          /* project quota */
  26 #define XFS_DQ_GROUP            0x0004          /* a group quota */
  27 #define XFS_DQ_DIRTY            0x0008          /* dquot is dirty */
  28 #define XFS_DQ_FREEING          0x0010          /* dquot is being torn down */
  29
  30 #define XFS_DQ_ALLTYPES         (XFS_DQ_USER|XFS_DQ_PROJ|XFS_DQ_GROUP)
  31
  32 #define XFS_DQ_FLAGS \
  33         { XFS_DQ_USER,          "USER" }, \
  34         { XFS_DQ_PROJ,          "PROJ" }, \
  35         { XFS_DQ_GROUP,         "GROUP" }, \
  36         { XFS_DQ_DIRTY,         "DIRTY" }, \
  37         { XFS_DQ_FREEING,       "FREEING" }
  38
  39 /*
  40  * We have the possibility of all three quota types being active at once, and
  41  * hence free space modification requires modification of all three current
  42  * dquots in a single transaction. For this case we need to have a reservation
  43  * of at least 3 dquots.
  44  *
  45  * However, a chmod operation can change both UID and GID in a single
  46  * transaction, resulting in requiring {old, new} x {uid, gid} dquots to be
  47  * modified. Hence for this case we need to reserve space for at least 4 dquots.
  48  *
  49  * And in the worst case, there's a rename operation that can be modifying up to
  50  * 4 inodes with dquots attached to them. In reality, the only inodes that can
  51  * have their dquots modified are the source and destination directory inodes
  52  * due to directory name creation and removal. That can require space allocation
  53  * and/or freeing on both directory inodes, and hence all three dquots on each
  54  * inode can be modified. And if the directories are world writeable, all the
  55  * dquots can be unique and so 6 dquots can be modified....
  56  *
  57  * And, of course, we also need to take into account the dquot log format item
  58  * used to describe each dquot.
  59  */
  60 #define XFS_DQUOT_LOGRES(mp)    \
  61         ((sizeof(struct xfs_dq_logformat) + sizeof(struct xfs_disk_dquot)) * 6)
  62
  63 #define XFS_IS_QUOTA_RUNNING(mp)        ((mp)->m_qflags & XFS_ALL_QUOTA_ACCT)
  64 #define XFS_IS_UQUOTA_RUNNING(mp)       ((mp)->m_qflags & XFS_UQUOTA_ACCT)
  65 #define XFS_IS_PQUOTA_RUNNING(mp)       ((mp)->m_qflags & XFS_PQUOTA_ACCT)
  66 #define XFS_IS_GQUOTA_RUNNING(mp)       ((mp)->m_qflags & XFS_GQUOTA_ACCT)
  67 #define XFS_IS_UQUOTA_ENFORCED(mp)      ((mp)->m_qflags & XFS_UQUOTA_ENFD)
  68 #define XFS_IS_GQUOTA_ENFORCED(mp)      ((mp)->m_qflags & XFS_GQUOTA_ENFD)
  69 #define XFS_IS_PQUOTA_ENFORCED(mp)      ((mp)->m_qflags & XFS_PQUOTA_ENFD)
  70
  71 /*
  72  * Incore only flags for quotaoff - these bits get cleared when quota(s)
  73  * are in the process of getting turned off. These flags are in m_qflags but
  74  * never in sb_qflags.
  75  */
  76 #define XFS_UQUOTA_ACTIVE       0x1000  /* uquotas are being turned off */
  77 #define XFS_GQUOTA_ACTIVE       0x2000  /* gquotas are being turned off */
  78 #define XFS_PQUOTA_ACTIVE       0x4000  /* pquotas are being turned off */
  79 #define XFS_ALL_QUOTA_ACTIVE    \
  80         (XFS_UQUOTA_ACTIVE | XFS_GQUOTA_ACTIVE | XFS_PQUOTA_ACTIVE)
  81
  82 /*
  83  * Checking XFS_IS_*QUOTA_ON() while holding any inode lock guarantees
  84  * quota will be not be switched off as long as that inode lock is held.
  85  */
  86 #define XFS_IS_QUOTA_ON(mp)     ((mp)->m_qflags & (XFS_UQUOTA_ACTIVE | \
  87                                                    XFS_GQUOTA_ACTIVE | \
  88                                                    XFS_PQUOTA_ACTIVE))
  89 #define XFS_IS_UQUOTA_ON(mp)    ((mp)->m_qflags & XFS_UQUOTA_ACTIVE)
  90 #define XFS_IS_GQUOTA_ON(mp)    ((mp)->m_qflags & XFS_GQUOTA_ACTIVE)
  91 #define XFS_IS_PQUOTA_ON(mp)    ((mp)->m_qflags & XFS_PQUOTA_ACTIVE)
  92
  93 /*
  94  * Flags to tell various functions what to do. Not all of these are meaningful
  95  * to a single function. None of these XFS_QMOPT_* flags are meant to have
  96  * persistent values (ie. their values can and will change between versions)
  97  */
  98 #define XFS_QMOPT_UQUOTA        0x0000004 /* user dquot requested */
  99 #define XFS_QMOPT_PQUOTA        0x0000008 /* project dquot requested */
 100 #define XFS_QMOPT_FORCE_RES     0x0000010 /* ignore quota limits */
 101 #define XFS_QMOPT_SBVERSION     0x0000040 /* change superblock version num */
 102 #define XFS_QMOPT_GQUOTA        0x0002000 /* group dquot requested */
 103 #define XFS_QMOPT_ENOSPC        0x0004000 /* enospc instead of edquot (prj) */
 104
 105 /*
 106  * flags to xfs_trans_mod_dquot to indicate which field needs to be
 107  * modified.
 108  */
 109 #define XFS_QMOPT_RES_REGBLKS   0x0010000
 110 #define XFS_QMOPT_RES_RTBLKS    0x0020000
 111 #define XFS_QMOPT_BCOUNT        0x0040000
 112 #define XFS_QMOPT_ICOUNT        0x0080000
 113 #define XFS_QMOPT_RTBCOUNT      0x0100000
 114 #define XFS_QMOPT_DELBCOUNT     0x0200000
 115 #define XFS_QMOPT_DELRTBCOUNT   0x0400000
 116 #define XFS_QMOPT_RES_INOS      0x0800000
 117
 118 /*
 119  * flags for dqalloc.
 120  */
 121 #define XFS_QMOPT_INHERIT       0x1000000
 122
 123 /*
 124  * flags to xfs_trans_mod_dquot.
 125  */
 126 #define XFS_TRANS_DQ_RES_BLKS   XFS_QMOPT_RES_REGBLKS
 127 #define XFS_TRANS_DQ_RES_RTBLKS XFS_QMOPT_RES_RTBLKS
 128 #define XFS_TRANS_DQ_RES_INOS   XFS_QMOPT_RES_INOS
 129 #define XFS_TRANS_DQ_BCOUNT     XFS_QMOPT_BCOUNT
 130 #define XFS_TRANS_DQ_DELBCOUNT  XFS_QMOPT_DELBCOUNT
 131 #define XFS_TRANS_DQ_ICOUNT     XFS_QMOPT_ICOUNT
 132 #define XFS_TRANS_DQ_RTBCOUNT   XFS_QMOPT_RTBCOUNT
 133 #define XFS_TRANS_DQ_DELRTBCOUNT XFS_QMOPT_DELRTBCOUNT
 134
 135
 136 #define XFS_QMOPT_QUOTALL       \
 137                 (XFS_QMOPT_UQUOTA | XFS_QMOPT_PQUOTA | XFS_QMOPT_GQUOTA)
 138 #define XFS_QMOPT_RESBLK_MASK   (XFS_QMOPT_RES_REGBLKS | XFS_QMOPT_RES_RTBLKS)
 139
 140 extern xfs_failaddr_t xfs_dquot_verify(struct xfs_mount *mp,
 141                 struct xfs_disk_dquot *ddq, xfs_dqid_t id, uint type);
 142 extern xfs_failaddr_t xfs_dqblk_verify(struct xfs_mount *mp,
 143                 struct xfs_dqblk *dqb, xfs_dqid_t id, uint type);
 144 extern int xfs_calc_dquots_per_chunk(unsigned int nbblks);
 145 extern void xfs_dqblk_repair(struct xfs_mount *mp, struct xfs_dqblk *dqb,
 146                 xfs_dqid_t id, uint type);
 147
 148 #endif  /* __XFS_QUOTA_H__ */