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 15struct xfs_trans; 16struct 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 40static inline uint 41xfs_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 */ 60struct 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 77enum xfs_apply_dqtrx_type { 78 XFS_APPLY_DQTRX_COMMIT = 0, 79 XFS_APPLY_DQTRX_UNRESERVE, 80}; 81 82/* 83 * Parameters for applying dqtrx changes to a dquot. The hook function arg 84 * parameter is enum xfs_apply_dqtrx_type. 85 */ 86struct xfs_apply_dqtrx_params { 87 uintptr_t tx_id; 88 xfs_ino_t ino; 89 xfs_dqtype_t q_type; 90 xfs_dqid_t q_id; 91}; 92 93#ifdef CONFIG_XFS_QUOTA 94extern void xfs_trans_dup_dqinfo(struct xfs_trans *, struct xfs_trans *); 95extern void xfs_trans_free_dqinfo(struct xfs_trans *); 96extern void xfs_trans_mod_dquot_byino(struct xfs_trans *, struct xfs_inode *, 97 uint, int64_t); 98extern void xfs_trans_apply_dquot_deltas(struct xfs_trans *); 99extern void xfs_trans_unreserve_and_mod_dquots(struct xfs_trans *); 100int xfs_trans_reserve_quota_nblks(struct xfs_trans *tp, struct xfs_inode *ip, 101 int64_t dblocks, int64_t rblocks, bool force); 102extern int xfs_trans_reserve_quota_bydquots(struct xfs_trans *, 103 struct xfs_mount *, struct xfs_dquot *, 104 struct xfs_dquot *, struct xfs_dquot *, int64_t, long, uint); 105int xfs_trans_reserve_quota_icreate(struct xfs_trans *tp, 106 struct xfs_dquot *udqp, struct xfs_dquot *gdqp, 107 struct xfs_dquot *pdqp, int64_t dblocks); 108 109extern int xfs_qm_vop_dqalloc(struct xfs_inode *, kuid_t, kgid_t, 110 prid_t, uint, struct xfs_dquot **, struct xfs_dquot **, 111 struct xfs_dquot **); 112extern void xfs_qm_vop_create_dqattach(struct xfs_trans *, struct xfs_inode *, 113 struct xfs_dquot *, struct xfs_dquot *, struct xfs_dquot *); 114extern int xfs_qm_vop_rename_dqattach(struct xfs_inode **); 115extern struct xfs_dquot *xfs_qm_vop_chown(struct xfs_trans *, 116 struct xfs_inode *, struct xfs_dquot **, struct xfs_dquot *); 117extern int xfs_qm_dqattach(struct xfs_inode *); 118extern int xfs_qm_dqattach_locked(struct xfs_inode *ip, bool doalloc); 119extern void xfs_qm_dqdetach(struct xfs_inode *); 120extern void xfs_qm_dqrele(struct xfs_dquot *); 121extern void xfs_qm_statvfs(struct xfs_inode *, struct kstatfs *); 122extern int xfs_qm_newmount(struct xfs_mount *, uint *, uint *); 123extern void xfs_qm_mount_quotas(struct xfs_mount *); 124extern void xfs_qm_unmount(struct xfs_mount *); 125extern void xfs_qm_unmount_quotas(struct xfs_mount *); 126bool xfs_inode_near_dquot_enforcement(struct xfs_inode *ip, xfs_dqtype_t type); 127 128# ifdef CONFIG_XFS_LIVE_HOOKS 129void xfs_trans_mod_ino_dquot(struct xfs_trans *tp, struct xfs_inode *ip, 130 struct xfs_dquot *dqp, unsigned int field, int64_t delta); 131 132struct xfs_quotainfo; 133 134struct xfs_dqtrx_hook { 135 struct xfs_hook mod_hook; 136 struct xfs_hook apply_hook; 137}; 138 139void xfs_dqtrx_hook_disable(void); 140void xfs_dqtrx_hook_enable(void); 141 142int xfs_dqtrx_hook_add(struct xfs_quotainfo *qi, struct xfs_dqtrx_hook *hook); 143void xfs_dqtrx_hook_del(struct xfs_quotainfo *qi, struct xfs_dqtrx_hook *hook); 144void xfs_dqtrx_hook_setup(struct xfs_dqtrx_hook *hook, notifier_fn_t mod_fn, 145 notifier_fn_t apply_fn); 146# else 147# define xfs_trans_mod_ino_dquot(tp, ip, dqp, field, delta) \ 148 xfs_trans_mod_dquot((tp), (dqp), (field), (delta)) 149# endif /* CONFIG_XFS_LIVE_HOOKS */ 150 151#else 152static inline int 153xfs_qm_vop_dqalloc(struct xfs_inode *ip, kuid_t kuid, kgid_t kgid, 154 prid_t prid, uint flags, struct xfs_dquot **udqp, 155 struct xfs_dquot **gdqp, struct xfs_dquot **pdqp) 156{ 157 *udqp = NULL; 158 *gdqp = NULL; 159 *pdqp = NULL; 160 return 0; 161} 162#define xfs_trans_dup_dqinfo(tp, tp2) 163#define xfs_trans_free_dqinfo(tp) 164static inline void xfs_trans_mod_dquot_byino(struct xfs_trans *tp, 165 struct xfs_inode *ip, uint field, int64_t delta) 166{ 167} 168#define xfs_trans_apply_dquot_deltas(tp) 169#define xfs_trans_unreserve_and_mod_dquots(tp) 170static inline int xfs_trans_reserve_quota_nblks(struct xfs_trans *tp, 171 struct xfs_inode *ip, int64_t dblocks, int64_t rblocks, 172 bool force) 173{ 174 return 0; 175} 176static inline int xfs_trans_reserve_quota_bydquots(struct xfs_trans *tp, 177 struct xfs_mount *mp, struct xfs_dquot *udqp, 178 struct xfs_dquot *gdqp, struct xfs_dquot *pdqp, 179 int64_t nblks, long nions, uint flags) 180{ 181 return 0; 182} 183 184static inline int 185xfs_trans_reserve_quota_icreate(struct xfs_trans *tp, struct xfs_dquot *udqp, 186 struct xfs_dquot *gdqp, struct xfs_dquot *pdqp, int64_t dblocks) 187{ 188 return 0; 189} 190 191#define xfs_qm_vop_create_dqattach(tp, ip, u, g, p) 192#define xfs_qm_vop_rename_dqattach(it) (0) 193#define xfs_qm_vop_chown(tp, ip, old, new) (NULL) 194#define xfs_qm_dqattach(ip) (0) 195#define xfs_qm_dqattach_locked(ip, fl) (0) 196#define xfs_qm_dqdetach(ip) 197#define xfs_qm_dqrele(d) do { (d) = (d); } while(0) 198#define xfs_qm_statvfs(ip, s) do { } while(0) 199#define xfs_qm_newmount(mp, a, b) (0) 200#define xfs_qm_mount_quotas(mp) 201#define xfs_qm_unmount(mp) 202#define xfs_qm_unmount_quotas(mp) 203#define xfs_inode_near_dquot_enforcement(ip, type) (false) 204 205# ifdef CONFIG_XFS_LIVE_HOOKS 206# define xfs_dqtrx_hook_enable() ((void)0) 207# define xfs_dqtrx_hook_disable() ((void)0) 208# endif /* CONFIG_XFS_LIVE_HOOKS */ 209 210#endif /* CONFIG_XFS_QUOTA */ 211 212static inline int 213xfs_quota_reserve_blkres(struct xfs_inode *ip, int64_t blocks) 214{ 215 return xfs_trans_reserve_quota_nblks(NULL, ip, blocks, 0, false); 216} 217 218static inline void 219xfs_quota_unreserve_blkres(struct xfs_inode *ip, uint64_t blocks) 220{ 221 /* don't return an error as unreserving quotas can't fail */ 222 xfs_quota_reserve_blkres(ip, -(int64_t)blocks); 223} 224 225extern int xfs_mount_reset_sbqflags(struct xfs_mount *); 226 227#endif /* __XFS_QUOTA_H__ */ 228