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 void xfs_trans_unreserve_and_mod_dquots(struct xfs_trans *tp, 105 bool already_locked); 106 int xfs_trans_reserve_quota_nblks(struct xfs_trans *tp, struct xfs_inode *ip, 107 int64_t dblocks, int64_t rblocks, bool force); 108 extern int xfs_trans_reserve_quota_bydquots(struct xfs_trans *, 109 struct xfs_mount *, struct xfs_dquot *, 110 struct xfs_dquot *, struct xfs_dquot *, int64_t, long, uint); 111 int xfs_trans_reserve_quota_icreate(struct xfs_trans *tp, 112 struct xfs_dquot *udqp, struct xfs_dquot *gdqp, 113 struct xfs_dquot *pdqp, int64_t dblocks); 114 115 extern int xfs_qm_vop_dqalloc(struct xfs_inode *, kuid_t, kgid_t, 116 prid_t, uint, struct xfs_dquot **, struct xfs_dquot **, 117 struct xfs_dquot **); 118 extern void xfs_qm_vop_create_dqattach(struct xfs_trans *, struct xfs_inode *, 119 struct xfs_dquot *, struct xfs_dquot *, struct xfs_dquot *); 120 extern int xfs_qm_vop_rename_dqattach(struct xfs_inode **); 121 extern struct xfs_dquot *xfs_qm_vop_chown(struct xfs_trans *, 122 struct xfs_inode *, struct xfs_dquot **, struct xfs_dquot *); 123 extern int xfs_qm_dqattach(struct xfs_inode *); 124 extern int xfs_qm_dqattach_locked(struct xfs_inode *ip, bool doalloc); 125 extern void xfs_qm_dqdetach(struct xfs_inode *); 126 extern void xfs_qm_dqrele(struct xfs_dquot *); 127 extern void xfs_qm_statvfs(struct xfs_inode *, struct kstatfs *); 128 extern int xfs_qm_newmount(struct xfs_mount *, uint *, uint *); 129 void xfs_qm_resume_quotaon(struct xfs_mount *mp); 130 extern void xfs_qm_mount_quotas(struct xfs_mount *); 131 extern void xfs_qm_unmount(struct xfs_mount *); 132 extern void xfs_qm_unmount_quotas(struct xfs_mount *); 133 bool xfs_inode_near_dquot_enforcement(struct xfs_inode *ip, xfs_dqtype_t type); 134 int xfs_quota_reserve_blkres(struct xfs_inode *ip, int64_t blocks); 135 136 # ifdef CONFIG_XFS_LIVE_HOOKS 137 void xfs_trans_mod_ino_dquot(struct xfs_trans *tp, struct xfs_inode *ip, 138 struct xfs_dquot *dqp, unsigned int field, int64_t delta); 139 140 struct xfs_quotainfo; 141 142 struct xfs_dqtrx_hook { 143 struct xfs_hook mod_hook; 144 struct xfs_hook apply_hook; 145 }; 146 147 void xfs_dqtrx_hook_disable(void); 148 void xfs_dqtrx_hook_enable(void); 149 150 int xfs_dqtrx_hook_add(struct xfs_quotainfo *qi, struct xfs_dqtrx_hook *hook); 151 void xfs_dqtrx_hook_del(struct xfs_quotainfo *qi, struct xfs_dqtrx_hook *hook); 152 void xfs_dqtrx_hook_setup(struct xfs_dqtrx_hook *hook, notifier_fn_t mod_fn, 153 notifier_fn_t apply_fn); 154 # else 155 # define xfs_trans_mod_ino_dquot(tp, ip, dqp, field, delta) \ 156 xfs_trans_mod_dquot((tp), (dqp), (field), (delta)) 157 # endif /* CONFIG_XFS_LIVE_HOOKS */ 158 159 #else 160 static inline int 161 xfs_qm_vop_dqalloc(struct xfs_inode *ip, kuid_t kuid, kgid_t kgid, 162 prid_t prid, uint flags, struct xfs_dquot **udqp, 163 struct xfs_dquot **gdqp, struct xfs_dquot **pdqp) 164 { 165 *udqp = NULL; 166 *gdqp = NULL; 167 *pdqp = NULL; 168 return 0; 169 } 170 #define xfs_trans_dup_dqinfo(tp, tp2) 171 #define xfs_trans_free_dqinfo(tp) 172 static inline void xfs_trans_mod_dquot_byino(struct xfs_trans *tp, 173 struct xfs_inode *ip, uint field, int64_t delta) 174 { 175 } 176 #define xfs_trans_apply_dquot_deltas(tp) 177 #define xfs_trans_unreserve_and_mod_dquots(tp, a) 178 static inline int xfs_trans_reserve_quota_nblks(struct xfs_trans *tp, 179 struct xfs_inode *ip, int64_t dblocks, int64_t rblocks, 180 bool force) 181 { 182 return 0; 183 } 184 static inline int xfs_trans_reserve_quota_bydquots(struct xfs_trans *tp, 185 struct xfs_mount *mp, struct xfs_dquot *udqp, 186 struct xfs_dquot *gdqp, struct xfs_dquot *pdqp, 187 int64_t nblks, long nions, uint flags) 188 { 189 return 0; 190 } 191 192 static inline int 193 xfs_trans_reserve_quota_icreate(struct xfs_trans *tp, struct xfs_dquot *udqp, 194 struct xfs_dquot *gdqp, struct xfs_dquot *pdqp, int64_t dblocks) 195 { 196 return 0; 197 } 198 199 #define xfs_qm_vop_create_dqattach(tp, ip, u, g, p) 200 #define xfs_qm_vop_rename_dqattach(it) (0) 201 #define xfs_qm_vop_chown(tp, ip, old, new) (NULL) 202 #define xfs_qm_dqattach(ip) (0) 203 #define xfs_qm_dqattach_locked(ip, fl) (0) 204 #define xfs_qm_dqdetach(ip) 205 #define xfs_qm_dqrele(d) do { (d) = (d); } while(0) 206 #define xfs_qm_statvfs(ip, s) do { } while(0) 207 #define xfs_qm_newmount(mp, a, b) (0) 208 #define xfs_qm_resume_quotaon(mp) ((void)0) 209 #define xfs_qm_mount_quotas(mp) 210 #define xfs_qm_unmount(mp) 211 #define xfs_qm_unmount_quotas(mp) 212 #define xfs_inode_near_dquot_enforcement(ip, type) (false) 213 214 static inline int xfs_quota_reserve_blkres(struct xfs_inode *ip, int64_t blocks) 215 { 216 return 0; 217 } 218 219 # ifdef CONFIG_XFS_LIVE_HOOKS 220 # define xfs_dqtrx_hook_enable() ((void)0) 221 # define xfs_dqtrx_hook_disable() ((void)0) 222 # endif /* CONFIG_XFS_LIVE_HOOKS */ 223 224 #endif /* CONFIG_XFS_QUOTA */ 225 226 static inline void 227 xfs_quota_unreserve_blkres(struct xfs_inode *ip, uint64_t blocks) 228 { 229 /* don't return an error as unreserving quotas can't fail */ 230 xfs_quota_reserve_blkres(ip, -(int64_t)blocks); 231 } 232 233 extern int xfs_mount_reset_sbqflags(struct xfs_mount *); 234 235 #endif /* __XFS_QUOTA_H__ */ 236