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_IS_DQDETACHED(ip) \ 33 ((ip)->i_udquot == NULL && \ 34 (ip)->i_gdquot == NULL && \ 35 (ip)->i_pdquot == NULL) 36 37 #define XFS_QM_NEED_QUOTACHECK(mp) \ 38 ((XFS_IS_UQUOTA_ON(mp) && \ 39 (mp->m_sb.sb_qflags & XFS_UQUOTA_CHKD) == 0) || \ 40 (XFS_IS_GQUOTA_ON(mp) && \ 41 (mp->m_sb.sb_qflags & XFS_GQUOTA_CHKD) == 0) || \ 42 (XFS_IS_PQUOTA_ON(mp) && \ 43 (mp->m_sb.sb_qflags & XFS_PQUOTA_CHKD) == 0)) 44 45 static inline uint 46 xfs_quota_chkd_flag( 47 xfs_dqtype_t type) 48 { 49 switch (type) { 50 case XFS_DQTYPE_USER: 51 return XFS_UQUOTA_CHKD; 52 case XFS_DQTYPE_GROUP: 53 return XFS_GQUOTA_CHKD; 54 case XFS_DQTYPE_PROJ: 55 return XFS_PQUOTA_CHKD; 56 default: 57 return 0; 58 } 59 } 60 61 /* 62 * The structure kept inside the xfs_trans_t keep track of dquot changes 63 * within a transaction and apply them later. 64 */ 65 struct xfs_dqtrx { 66 struct xfs_dquot *qt_dquot; /* the dquot this refers to */ 67 68 uint64_t qt_blk_res; /* blks reserved on a dquot */ 69 int64_t qt_bcount_delta; /* dquot blk count changes */ 70 int64_t qt_delbcnt_delta; /* delayed dquot blk count changes */ 71 72 uint64_t qt_rtblk_res; /* # blks reserved on a dquot */ 73 uint64_t qt_rtblk_res_used;/* # blks used from reservation */ 74 int64_t qt_rtbcount_delta;/* dquot realtime blk changes */ 75 int64_t qt_delrtb_delta; /* delayed RT blk count changes */ 76 77 uint64_t qt_ino_res; /* inode reserved on a dquot */ 78 uint64_t qt_ino_res_used; /* inodes used from the reservation */ 79 int64_t qt_icount_delta; /* dquot inode count changes */ 80 }; 81 82 enum xfs_apply_dqtrx_type { 83 XFS_APPLY_DQTRX_COMMIT = 0, 84 XFS_APPLY_DQTRX_UNRESERVE, 85 }; 86 87 /* 88 * Parameters for applying dqtrx changes to a dquot. The hook function arg 89 * parameter is enum xfs_apply_dqtrx_type. 90 */ 91 struct xfs_apply_dqtrx_params { 92 uintptr_t tx_id; 93 xfs_ino_t ino; 94 xfs_dqtype_t q_type; 95 xfs_dqid_t q_id; 96 }; 97 98 #ifdef CONFIG_XFS_QUOTA 99 extern void xfs_trans_dup_dqinfo(struct xfs_trans *, struct xfs_trans *); 100 extern void xfs_trans_free_dqinfo(struct xfs_trans *); 101 extern void xfs_trans_mod_dquot_byino(struct xfs_trans *, struct xfs_inode *, 102 uint, int64_t); 103 extern void xfs_trans_apply_dquot_deltas(struct xfs_trans *); 104 extern void xfs_trans_unreserve_and_mod_dquots(struct xfs_trans *); 105 int xfs_trans_reserve_quota_nblks(struct xfs_trans *tp, struct xfs_inode *ip, 106 int64_t dblocks, int64_t rblocks, bool force); 107 extern int xfs_trans_reserve_quota_bydquots(struct xfs_trans *, 108 struct xfs_mount *, struct xfs_dquot *, 109 struct xfs_dquot *, struct xfs_dquot *, int64_t, long, uint); 110 int xfs_trans_reserve_quota_icreate(struct xfs_trans *tp, 111 struct xfs_dquot *udqp, struct xfs_dquot *gdqp, 112 struct xfs_dquot *pdqp, int64_t dblocks); 113 114 extern int xfs_qm_vop_dqalloc(struct xfs_inode *, kuid_t, kgid_t, 115 prid_t, uint, struct xfs_dquot **, struct xfs_dquot **, 116 struct xfs_dquot **); 117 extern void xfs_qm_vop_create_dqattach(struct xfs_trans *, struct xfs_inode *, 118 struct xfs_dquot *, struct xfs_dquot *, struct xfs_dquot *); 119 extern int xfs_qm_vop_rename_dqattach(struct xfs_inode **); 120 extern struct xfs_dquot *xfs_qm_vop_chown(struct xfs_trans *, 121 struct xfs_inode *, struct xfs_dquot **, struct xfs_dquot *); 122 extern int xfs_qm_dqattach(struct xfs_inode *); 123 extern int xfs_qm_dqattach_locked(struct xfs_inode *ip, bool doalloc); 124 extern void xfs_qm_dqdetach(struct xfs_inode *); 125 extern void xfs_qm_dqrele(struct xfs_dquot *); 126 extern void xfs_qm_statvfs(struct xfs_inode *, struct kstatfs *); 127 extern int xfs_qm_newmount(struct xfs_mount *, uint *, uint *); 128 void xfs_qm_resume_quotaon(struct xfs_mount *mp); 129 extern void xfs_qm_mount_quotas(struct xfs_mount *); 130 extern void xfs_qm_unmount(struct xfs_mount *); 131 extern void xfs_qm_unmount_quotas(struct xfs_mount *); 132 bool xfs_inode_near_dquot_enforcement(struct xfs_inode *ip, xfs_dqtype_t type); 133 int xfs_quota_reserve_blkres(struct xfs_inode *ip, int64_t blocks); 134 135 # ifdef CONFIG_XFS_LIVE_HOOKS 136 void xfs_trans_mod_ino_dquot(struct xfs_trans *tp, struct xfs_inode *ip, 137 struct xfs_dquot *dqp, unsigned int field, int64_t delta); 138 139 struct xfs_quotainfo; 140 141 struct xfs_dqtrx_hook { 142 struct xfs_hook mod_hook; 143 struct xfs_hook apply_hook; 144 }; 145 146 void xfs_dqtrx_hook_disable(void); 147 void xfs_dqtrx_hook_enable(void); 148 149 int xfs_dqtrx_hook_add(struct xfs_quotainfo *qi, struct xfs_dqtrx_hook *hook); 150 void xfs_dqtrx_hook_del(struct xfs_quotainfo *qi, struct xfs_dqtrx_hook *hook); 151 void xfs_dqtrx_hook_setup(struct xfs_dqtrx_hook *hook, notifier_fn_t mod_fn, 152 notifier_fn_t apply_fn); 153 # else 154 # define xfs_trans_mod_ino_dquot(tp, ip, dqp, field, delta) \ 155 xfs_trans_mod_dquot((tp), (dqp), (field), (delta)) 156 # endif /* CONFIG_XFS_LIVE_HOOKS */ 157 158 #else 159 static inline int 160 xfs_qm_vop_dqalloc(struct xfs_inode *ip, kuid_t kuid, kgid_t kgid, 161 prid_t prid, uint flags, struct xfs_dquot **udqp, 162 struct xfs_dquot **gdqp, struct xfs_dquot **pdqp) 163 { 164 *udqp = NULL; 165 *gdqp = NULL; 166 *pdqp = NULL; 167 return 0; 168 } 169 #define xfs_trans_dup_dqinfo(tp, tp2) 170 #define xfs_trans_free_dqinfo(tp) 171 static inline void xfs_trans_mod_dquot_byino(struct xfs_trans *tp, 172 struct xfs_inode *ip, uint field, int64_t delta) 173 { 174 } 175 #define xfs_trans_apply_dquot_deltas(tp) 176 #define xfs_trans_unreserve_and_mod_dquots(tp) 177 static inline int xfs_trans_reserve_quota_nblks(struct xfs_trans *tp, 178 struct xfs_inode *ip, int64_t dblocks, int64_t rblocks, 179 bool force) 180 { 181 return 0; 182 } 183 static inline int xfs_trans_reserve_quota_bydquots(struct xfs_trans *tp, 184 struct xfs_mount *mp, struct xfs_dquot *udqp, 185 struct xfs_dquot *gdqp, struct xfs_dquot *pdqp, 186 int64_t nblks, long nions, uint flags) 187 { 188 return 0; 189 } 190 191 static inline int 192 xfs_trans_reserve_quota_icreate(struct xfs_trans *tp, struct xfs_dquot *udqp, 193 struct xfs_dquot *gdqp, struct xfs_dquot *pdqp, int64_t dblocks) 194 { 195 return 0; 196 } 197 198 #define xfs_qm_vop_create_dqattach(tp, ip, u, g, p) 199 #define xfs_qm_vop_rename_dqattach(it) (0) 200 #define xfs_qm_vop_chown(tp, ip, old, new) (NULL) 201 #define xfs_qm_dqattach(ip) (0) 202 #define xfs_qm_dqattach_locked(ip, fl) (0) 203 #define xfs_qm_dqdetach(ip) 204 #define xfs_qm_dqrele(d) do { (d) = (d); } while(0) 205 #define xfs_qm_statvfs(ip, s) do { } while(0) 206 #define xfs_qm_newmount(mp, a, b) (0) 207 #define xfs_qm_resume_quotaon(mp) ((void)0) 208 #define xfs_qm_mount_quotas(mp) 209 #define xfs_qm_unmount(mp) 210 #define xfs_qm_unmount_quotas(mp) 211 #define xfs_inode_near_dquot_enforcement(ip, type) (false) 212 213 static inline int xfs_quota_reserve_blkres(struct xfs_inode *ip, int64_t blocks) 214 { 215 return 0; 216 } 217 218 # ifdef CONFIG_XFS_LIVE_HOOKS 219 # define xfs_dqtrx_hook_enable() ((void)0) 220 # define xfs_dqtrx_hook_disable() ((void)0) 221 # endif /* CONFIG_XFS_LIVE_HOOKS */ 222 223 #endif /* CONFIG_XFS_QUOTA */ 224 225 static inline void 226 xfs_quota_unreserve_blkres(struct xfs_inode *ip, uint64_t blocks) 227 { 228 /* don't return an error as unreserving quotas can't fail */ 229 xfs_quota_reserve_blkres(ip, -(int64_t)blocks); 230 } 231 232 extern int xfs_mount_reset_sbqflags(struct xfs_mount *); 233 234 #endif /* __XFS_QUOTA_H__ */ 235