fs/xfs/libxfs/xfs_quota_defs.h

   1 /*
   2  * Copyright (c) 2000-2005 Silicon Graphics, Inc.
   3  * All Rights Reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public License as
   7  * published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it would be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  *
  14  * You should have received a copy of the GNU General Public License
  15  * along with this program; if not, write the Free Software Foundation,
  16  * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  17  */
  18 #ifndef __XFS_QUOTA_DEFS_H__
  19 #define __XFS_QUOTA_DEFS_H__
  20
  21 /*
  22  * Quota definitions shared between user and kernel source trees.
  23  */
  24
  25 /*
  26  * Even though users may not have quota limits occupying all 64-bits,
  27  * they may need 64-bit accounting. Hence, 64-bit quota-counters,
  28  * and quota-limits. This is a waste in the common case, but hey ...
  29  */
  30 typedef uint64_t        xfs_qcnt_t;
  31 typedef uint16_t        xfs_qwarncnt_t;
  32
  33 /*
  34  * flags for q_flags field in the dquot.
  35  */
  36 #define XFS_DQ_USER             0x0001          /* a user quota */
  37 #define XFS_DQ_PROJ             0x0002          /* project quota */
  38 #define XFS_DQ_GROUP            0x0004          /* a group quota */
  39 #define XFS_DQ_DIRTY            0x0008          /* dquot is dirty */
  40 #define XFS_DQ_FREEING          0x0010          /* dquot is being torn down */
  41
  42 #define XFS_DQ_ALLTYPES         (XFS_DQ_USER|XFS_DQ_PROJ|XFS_DQ_GROUP)
  43
  44 #define XFS_DQ_FLAGS \
  45         { XFS_DQ_USER,          "USER" }, \
  46         { XFS_DQ_PROJ,          "PROJ" }, \
  47         { XFS_DQ_GROUP,         "GROUP" }, \
  48         { XFS_DQ_DIRTY,         "DIRTY" }, \
  49         { XFS_DQ_FREEING,       "FREEING" }
  50
  51 /*
  52  * We have the possibility of all three quota types being active at once, and
  53  * hence free space modification requires modification of all three current
  54  * dquots in a single transaction. For this case we need to have a reservation
  55  * of at least 3 dquots.
  56  *
  57  * However, a chmod operation can change both UID and GID in a single
  58  * transaction, resulting in requiring {old, new} x {uid, gid} dquots to be
  59  * modified. Hence for this case we need to reserve space for at least 4 dquots.
  60  *
  61  * And in the worst case, there's a rename operation that can be modifying up to
  62  * 4 inodes with dquots attached to them. In reality, the only inodes that can
  63  * have their dquots modified are the source and destination directory inodes
  64  * due to directory name creation and removal. That can require space allocation
  65  * and/or freeing on both directory inodes, and hence all three dquots on each
  66  * inode can be modified. And if the directories are world writeable, all the
  67  * dquots can be unique and so 6 dquots can be modified....
  68  *
  69  * And, of course, we also need to take into account the dquot log format item
  70  * used to describe each dquot.
  71  */
  72 #define XFS_DQUOT_LOGRES(mp)    \
  73         ((sizeof(struct xfs_dq_logformat) + sizeof(struct xfs_disk_dquot)) * 6)
  74
  75 #define XFS_IS_QUOTA_RUNNING(mp)        ((mp)->m_qflags & XFS_ALL_QUOTA_ACCT)
  76 #define XFS_IS_UQUOTA_RUNNING(mp)       ((mp)->m_qflags & XFS_UQUOTA_ACCT)
  77 #define XFS_IS_PQUOTA_RUNNING(mp)       ((mp)->m_qflags & XFS_PQUOTA_ACCT)
  78 #define XFS_IS_GQUOTA_RUNNING(mp)       ((mp)->m_qflags & XFS_GQUOTA_ACCT)
  79 #define XFS_IS_UQUOTA_ENFORCED(mp)      ((mp)->m_qflags & XFS_UQUOTA_ENFD)
  80 #define XFS_IS_GQUOTA_ENFORCED(mp)      ((mp)->m_qflags & XFS_GQUOTA_ENFD)
  81 #define XFS_IS_PQUOTA_ENFORCED(mp)      ((mp)->m_qflags & XFS_PQUOTA_ENFD)
  82
  83 /*
  84  * Incore only flags for quotaoff - these bits get cleared when quota(s)
  85  * are in the process of getting turned off. These flags are in m_qflags but
  86  * never in sb_qflags.
  87  */
  88 #define XFS_UQUOTA_ACTIVE       0x1000  /* uquotas are being turned off */
  89 #define XFS_GQUOTA_ACTIVE       0x2000  /* gquotas are being turned off */
  90 #define XFS_PQUOTA_ACTIVE       0x4000  /* pquotas are being turned off */
  91 #define XFS_ALL_QUOTA_ACTIVE    \
  92         (XFS_UQUOTA_ACTIVE | XFS_GQUOTA_ACTIVE | XFS_PQUOTA_ACTIVE)
  93
  94 /*
  95  * Checking XFS_IS_*QUOTA_ON() while holding any inode lock guarantees
  96  * quota will be not be switched off as long as that inode lock is held.
  97  */
  98 #define XFS_IS_QUOTA_ON(mp)     ((mp)->m_qflags & (XFS_UQUOTA_ACTIVE | \
  99                                                    XFS_GQUOTA_ACTIVE | \
 100                                                    XFS_PQUOTA_ACTIVE))
 101 #define XFS_IS_UQUOTA_ON(mp)    ((mp)->m_qflags & XFS_UQUOTA_ACTIVE)
 102 #define XFS_IS_GQUOTA_ON(mp)    ((mp)->m_qflags & XFS_GQUOTA_ACTIVE)
 103 #define XFS_IS_PQUOTA_ON(mp)    ((mp)->m_qflags & XFS_PQUOTA_ACTIVE)
 104
 105 /*
 106  * Flags to tell various functions what to do. Not all of these are meaningful
 107  * to a single function. None of these XFS_QMOPT_* flags are meant to have
 108  * persistent values (ie. their values can and will change between versions)
 109  */
 110 #define XFS_QMOPT_DQALLOC       0x0000002 /* alloc dquot ondisk if needed */
 111 #define XFS_QMOPT_UQUOTA        0x0000004 /* user dquot requested */
 112 #define XFS_QMOPT_PQUOTA        0x0000008 /* project dquot requested */
 113 #define XFS_QMOPT_FORCE_RES     0x0000010 /* ignore quota limits */
 114 #define XFS_QMOPT_SBVERSION     0x0000040 /* change superblock version num */
 115 #define XFS_QMOPT_DOWARN        0x0000400 /* increase warning cnt if needed */
 116 #define XFS_QMOPT_DQREPAIR      0x0001000 /* repair dquot if damaged */
 117 #define XFS_QMOPT_GQUOTA        0x0002000 /* group dquot requested */
 118 #define XFS_QMOPT_ENOSPC        0x0004000 /* enospc instead of edquot (prj) */
 119 #define XFS_QMOPT_DQNEXT        0x0008000 /* return next dquot >= this ID */
 120
 121 /*
 122  * flags to xfs_trans_mod_dquot to indicate which field needs to be
 123  * modified.
 124  */
 125 #define XFS_QMOPT_RES_REGBLKS   0x0010000
 126 #define XFS_QMOPT_RES_RTBLKS    0x0020000
 127 #define XFS_QMOPT_BCOUNT        0x0040000
 128 #define XFS_QMOPT_ICOUNT        0x0080000
 129 #define XFS_QMOPT_RTBCOUNT      0x0100000
 130 #define XFS_QMOPT_DELBCOUNT     0x0200000
 131 #define XFS_QMOPT_DELRTBCOUNT   0x0400000
 132 #define XFS_QMOPT_RES_INOS      0x0800000
 133
 134 /*
 135  * flags for dqalloc.
 136  */
 137 #define XFS_QMOPT_INHERIT       0x1000000
 138
 139 /*
 140  * flags to xfs_trans_mod_dquot.
 141  */
 142 #define XFS_TRANS_DQ_RES_BLKS   XFS_QMOPT_RES_REGBLKS
 143 #define XFS_TRANS_DQ_RES_RTBLKS XFS_QMOPT_RES_RTBLKS
 144 #define XFS_TRANS_DQ_RES_INOS   XFS_QMOPT_RES_INOS
 145 #define XFS_TRANS_DQ_BCOUNT     XFS_QMOPT_BCOUNT
 146 #define XFS_TRANS_DQ_DELBCOUNT  XFS_QMOPT_DELBCOUNT
 147 #define XFS_TRANS_DQ_ICOUNT     XFS_QMOPT_ICOUNT
 148 #define XFS_TRANS_DQ_RTBCOUNT   XFS_QMOPT_RTBCOUNT
 149 #define XFS_TRANS_DQ_DELRTBCOUNT XFS_QMOPT_DELRTBCOUNT
 150
 151
 152 #define XFS_QMOPT_QUOTALL       \
 153                 (XFS_QMOPT_UQUOTA | XFS_QMOPT_PQUOTA | XFS_QMOPT_GQUOTA)
 154 #define XFS_QMOPT_RESBLK_MASK   (XFS_QMOPT_RES_REGBLKS | XFS_QMOPT_RES_RTBLKS)
 155
 156 extern int xfs_dqcheck(struct xfs_mount *mp, xfs_disk_dquot_t *ddq,
 157                        xfs_dqid_t id, uint type, uint flags, const char *str);
 158 extern int xfs_calc_dquots_per_chunk(unsigned int nbblks);
 159
 160 #endif  /* __XFS_QUOTA_H__ */