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Linux kernel mirror (for testing)
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linux
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;
16
17/*
18 * This check is done typically without holding the inode lock;
19 * that may seem racy, but it is harmless in the context that it is used.
20 * The inode cannot go inactive as long a reference is kept, and
21 * therefore if dquot(s) were attached, they'll stay consistent.
22 * If, for example, the ownership of the inode changes while
23 * we didn't have the inode locked, the appropriate dquot(s) will be
24 * attached atomically.
25 */
26#define XFS_NOT_DQATTACHED(mp, ip) \
27 ((XFS_IS_UQUOTA_ON(mp) && (ip)->i_udquot == NULL) || \
28 (XFS_IS_GQUOTA_ON(mp) && (ip)->i_gdquot == NULL) || \
29 (XFS_IS_PQUOTA_ON(mp) && (ip)->i_pdquot == NULL))
30
31#define XFS_QM_NEED_QUOTACHECK(mp) \
32 ((XFS_IS_UQUOTA_ON(mp) && \
33 (mp->m_sb.sb_qflags & XFS_UQUOTA_CHKD) == 0) || \
34 (XFS_IS_GQUOTA_ON(mp) && \
35 (mp->m_sb.sb_qflags & XFS_GQUOTA_CHKD) == 0) || \
36 (XFS_IS_PQUOTA_ON(mp) && \
37 (mp->m_sb.sb_qflags & XFS_PQUOTA_CHKD) == 0))
38
39static inline uint
40xfs_quota_chkd_flag(
41 uint dqtype)
42{
43 switch (dqtype) {
44 case XFS_DQ_USER:
45 return XFS_UQUOTA_CHKD;
46 case XFS_DQ_GROUP:
47 return XFS_GQUOTA_CHKD;
48 case XFS_DQ_PROJ:
49 return XFS_PQUOTA_CHKD;
50 default:
51 return 0;
52 }
53}
54
55/*
56 * The structure kept inside the xfs_trans_t keep track of dquot changes
57 * within a transaction and apply them later.
58 */
59typedef struct xfs_dqtrx {
60 struct xfs_dquot *qt_dquot; /* the dquot this refers to */
61 ulong qt_blk_res; /* blks reserved on a dquot */
62 ulong qt_ino_res; /* inode reserved on a dquot */
63 ulong qt_ino_res_used; /* inodes used from the reservation */
64 long qt_bcount_delta; /* dquot blk count changes */
65 long qt_delbcnt_delta; /* delayed dquot blk count changes */
66 long qt_icount_delta; /* dquot inode count changes */
67 ulong qt_rtblk_res; /* # blks reserved on a dquot */
68 ulong qt_rtblk_res_used;/* # blks used from reservation */
69 long qt_rtbcount_delta;/* dquot realtime blk changes */
70 long qt_delrtb_delta; /* delayed RT blk count changes */
71} xfs_dqtrx_t;
72
73#ifdef CONFIG_XFS_QUOTA
74extern void xfs_trans_dup_dqinfo(struct xfs_trans *, struct xfs_trans *);
75extern void xfs_trans_free_dqinfo(struct xfs_trans *);
76extern void xfs_trans_mod_dquot_byino(struct xfs_trans *, struct xfs_inode *,
77 uint, long);
78extern void xfs_trans_apply_dquot_deltas(struct xfs_trans *);
79extern void xfs_trans_unreserve_and_mod_dquots(struct xfs_trans *);
80extern int xfs_trans_reserve_quota_nblks(struct xfs_trans *,
81 struct xfs_inode *, long, long, uint);
82extern int xfs_trans_reserve_quota_bydquots(struct xfs_trans *,
83 struct xfs_mount *, struct xfs_dquot *,
84 struct xfs_dquot *, struct xfs_dquot *, long, long, uint);
85
86extern int xfs_qm_vop_dqalloc(struct xfs_inode *, xfs_dqid_t, xfs_dqid_t,
87 prid_t, uint, struct xfs_dquot **, struct xfs_dquot **,
88 struct xfs_dquot **);
89extern void xfs_qm_vop_create_dqattach(struct xfs_trans *, struct xfs_inode *,
90 struct xfs_dquot *, struct xfs_dquot *, struct xfs_dquot *);
91extern int xfs_qm_vop_rename_dqattach(struct xfs_inode **);
92extern struct xfs_dquot *xfs_qm_vop_chown(struct xfs_trans *,
93 struct xfs_inode *, struct xfs_dquot **, struct xfs_dquot *);
94extern int xfs_qm_vop_chown_reserve(struct xfs_trans *, struct xfs_inode *,
95 struct xfs_dquot *, struct xfs_dquot *,
96 struct xfs_dquot *, uint);
97extern int xfs_qm_dqattach(struct xfs_inode *);
98extern int xfs_qm_dqattach_locked(struct xfs_inode *ip, bool doalloc);
99extern void xfs_qm_dqdetach(struct xfs_inode *);
100extern void xfs_qm_dqrele(struct xfs_dquot *);
101extern void xfs_qm_statvfs(struct xfs_inode *, struct kstatfs *);
102extern int xfs_qm_newmount(struct xfs_mount *, uint *, uint *);
103extern void xfs_qm_mount_quotas(struct xfs_mount *);
104extern void xfs_qm_unmount(struct xfs_mount *);
105extern void xfs_qm_unmount_quotas(struct xfs_mount *);
106
107#else
108static inline int
109xfs_qm_vop_dqalloc(struct xfs_inode *ip, xfs_dqid_t uid, xfs_dqid_t gid,
110 prid_t prid, uint flags, struct xfs_dquot **udqp,
111 struct xfs_dquot **gdqp, struct xfs_dquot **pdqp)
112{
113 *udqp = NULL;
114 *gdqp = NULL;
115 *pdqp = NULL;
116 return 0;
117}
118#define xfs_trans_dup_dqinfo(tp, tp2)
119#define xfs_trans_free_dqinfo(tp)
120#define xfs_trans_mod_dquot_byino(tp, ip, fields, delta)
121#define xfs_trans_apply_dquot_deltas(tp)
122#define xfs_trans_unreserve_and_mod_dquots(tp)
123static inline int xfs_trans_reserve_quota_nblks(struct xfs_trans *tp,
124 struct xfs_inode *ip, long nblks, long ninos, uint flags)
125{
126 return 0;
127}
128static inline int xfs_trans_reserve_quota_bydquots(struct xfs_trans *tp,
129 struct xfs_mount *mp, struct xfs_dquot *udqp,
130 struct xfs_dquot *gdqp, struct xfs_dquot *pdqp,
131 long nblks, long nions, uint flags)
132{
133 return 0;
134}
135#define xfs_qm_vop_create_dqattach(tp, ip, u, g, p)
136#define xfs_qm_vop_rename_dqattach(it) (0)
137#define xfs_qm_vop_chown(tp, ip, old, new) (NULL)
138#define xfs_qm_vop_chown_reserve(tp, ip, u, g, p, fl) (0)
139#define xfs_qm_dqattach(ip) (0)
140#define xfs_qm_dqattach_locked(ip, fl) (0)
141#define xfs_qm_dqdetach(ip)
142#define xfs_qm_dqrele(d)
143#define xfs_qm_statvfs(ip, s)
144#define xfs_qm_newmount(mp, a, b) (0)
145#define xfs_qm_mount_quotas(mp)
146#define xfs_qm_unmount(mp)
147#define xfs_qm_unmount_quotas(mp)
148#endif /* CONFIG_XFS_QUOTA */
149
150#define xfs_trans_unreserve_quota_nblks(tp, ip, nblks, ninos, flags) \
151 xfs_trans_reserve_quota_nblks(tp, ip, -(nblks), -(ninos), flags)
152#define xfs_trans_reserve_quota(tp, mp, ud, gd, pd, nb, ni, f) \
153 xfs_trans_reserve_quota_bydquots(tp, mp, ud, gd, pd, nb, ni, \
154 f | XFS_QMOPT_RES_REGBLKS)
155
156extern int xfs_mount_reset_sbqflags(struct xfs_mount *);
157
158#endif /* __XFS_QUOTA_H__ */