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1// SPDX-License-Identifier: GPL-2.02/*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 functions13 */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, and22 * therefore if dquot(s) were attached, they'll stay consistent.23 * If, for example, the ownership of the inode changes while24 * we didn't have the inode locked, the appropriate dquot(s) will be25 * 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 uint41xfs_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 changes58 * 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 arg84 * 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_QUOTA94extern 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_HOOKS129void 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# else147# 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#else152static inline int153xfs_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 int185xfs_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_HOOKS206# 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 int213xfs_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 void219xfs_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