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