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__ */ 184