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TOMOYO Linux Cross Reference
Linux/fs/xfs/libxfs/xfs_quota_defs.h

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  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 beeing 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 
120 /*
121  * flags to xfs_trans_mod_dquot to indicate which field needs to be
122  * modified.
123  */
124 #define XFS_QMOPT_RES_REGBLKS   0x0010000
125 #define XFS_QMOPT_RES_RTBLKS    0x0020000
126 #define XFS_QMOPT_BCOUNT        0x0040000
127 #define XFS_QMOPT_ICOUNT        0x0080000
128 #define XFS_QMOPT_RTBCOUNT      0x0100000
129 #define XFS_QMOPT_DELBCOUNT     0x0200000
130 #define XFS_QMOPT_DELRTBCOUNT   0x0400000
131 #define XFS_QMOPT_RES_INOS      0x0800000
132 
133 /*
134  * flags for dqalloc.
135  */
136 #define XFS_QMOPT_INHERIT       0x1000000
137 
138 /*
139  * flags to xfs_trans_mod_dquot.
140  */
141 #define XFS_TRANS_DQ_RES_BLKS   XFS_QMOPT_RES_REGBLKS
142 #define XFS_TRANS_DQ_RES_RTBLKS XFS_QMOPT_RES_RTBLKS
143 #define XFS_TRANS_DQ_RES_INOS   XFS_QMOPT_RES_INOS
144 #define XFS_TRANS_DQ_BCOUNT     XFS_QMOPT_BCOUNT
145 #define XFS_TRANS_DQ_DELBCOUNT  XFS_QMOPT_DELBCOUNT
146 #define XFS_TRANS_DQ_ICOUNT     XFS_QMOPT_ICOUNT
147 #define XFS_TRANS_DQ_RTBCOUNT   XFS_QMOPT_RTBCOUNT
148 #define XFS_TRANS_DQ_DELRTBCOUNT XFS_QMOPT_DELRTBCOUNT
149 
150 
151 #define XFS_QMOPT_QUOTALL       \
152                 (XFS_QMOPT_UQUOTA | XFS_QMOPT_PQUOTA | XFS_QMOPT_GQUOTA)
153 #define XFS_QMOPT_RESBLK_MASK   (XFS_QMOPT_RES_REGBLKS | XFS_QMOPT_RES_RTBLKS)
154 
155 extern int xfs_dqcheck(struct xfs_mount *mp, xfs_disk_dquot_t *ddq,
156                        xfs_dqid_t id, uint type, uint flags, char *str);
157 extern int xfs_calc_dquots_per_chunk(unsigned int nbblks);
158 
159 #endif  /* __XFS_QUOTA_H__ */
160 

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