tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
3 * All Rights Reserved.
4 *
5 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
7 * published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it would be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write the Free Software Foundation,
16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
17 */
18#ifndef __XFS_QUOTA_H__
19#define __XFS_QUOTA_H__
20
21#include "xfs_quota_defs.h"
22
23/*
24 * Kernel only quota definitions and functions
25 */
26
27struct xfs_trans;
28
29/*
30 * This check is done typically without holding the inode lock;
31 * that may seem racy, but it is harmless in the context that it is used.
32 * The inode cannot go inactive as long a reference is kept, and
33 * therefore if dquot(s) were attached, they'll stay consistent.
34 * If, for example, the ownership of the inode changes while
35 * we didn't have the inode locked, the appropriate dquot(s) will be
36 * attached atomically.
37 */
38#define XFS_NOT_DQATTACHED(mp, ip) \
39 ((XFS_IS_UQUOTA_ON(mp) && (ip)->i_udquot == NULL) || \
40 (XFS_IS_GQUOTA_ON(mp) && (ip)->i_gdquot == NULL) || \
41 (XFS_IS_PQUOTA_ON(mp) && (ip)->i_pdquot == NULL))
42
43#define XFS_QM_NEED_QUOTACHECK(mp) \
44 ((XFS_IS_UQUOTA_ON(mp) && \
45 (mp->m_sb.sb_qflags & XFS_UQUOTA_CHKD) == 0) || \
46 (XFS_IS_GQUOTA_ON(mp) && \
47 (mp->m_sb.sb_qflags & XFS_GQUOTA_CHKD) == 0) || \
48 (XFS_IS_PQUOTA_ON(mp) && \
49 (mp->m_sb.sb_qflags & XFS_PQUOTA_CHKD) == 0))
50
51/*
52 * The structure kept inside the xfs_trans_t keep track of dquot changes
53 * within a transaction and apply them later.
54 */
55typedef struct xfs_dqtrx {
56 struct xfs_dquot *qt_dquot; /* the dquot this refers to */
57 ulong qt_blk_res; /* blks reserved on a dquot */
58 ulong qt_ino_res; /* inode reserved on a dquot */
59 ulong qt_ino_res_used; /* inodes used from the reservation */
60 long qt_bcount_delta; /* dquot blk count changes */
61 long qt_delbcnt_delta; /* delayed dquot blk count changes */
62 long qt_icount_delta; /* dquot inode count changes */
63 ulong qt_rtblk_res; /* # blks reserved on a dquot */
64 ulong qt_rtblk_res_used;/* # blks used from reservation */
65 long qt_rtbcount_delta;/* dquot realtime blk changes */
66 long qt_delrtb_delta; /* delayed RT blk count changes */
67} xfs_dqtrx_t;
68
69#ifdef CONFIG_XFS_QUOTA
70extern void xfs_trans_dup_dqinfo(struct xfs_trans *, struct xfs_trans *);
71extern void xfs_trans_free_dqinfo(struct xfs_trans *);
72extern void xfs_trans_mod_dquot_byino(struct xfs_trans *, struct xfs_inode *,
73 uint, long);
74extern void xfs_trans_apply_dquot_deltas(struct xfs_trans *);
75extern void xfs_trans_unreserve_and_mod_dquots(struct xfs_trans *);
76extern int xfs_trans_reserve_quota_nblks(struct xfs_trans *,
77 struct xfs_inode *, long, long, uint);
78extern int xfs_trans_reserve_quota_bydquots(struct xfs_trans *,
79 struct xfs_mount *, struct xfs_dquot *,
80 struct xfs_dquot *, struct xfs_dquot *, long, long, uint);
81
82extern int xfs_qm_vop_dqalloc(struct xfs_inode *, xfs_dqid_t, xfs_dqid_t,
83 prid_t, uint, struct xfs_dquot **, struct xfs_dquot **,
84 struct xfs_dquot **);
85extern void xfs_qm_vop_create_dqattach(struct xfs_trans *, struct xfs_inode *,
86 struct xfs_dquot *, struct xfs_dquot *, struct xfs_dquot *);
87extern int xfs_qm_vop_rename_dqattach(struct xfs_inode **);
88extern struct xfs_dquot *xfs_qm_vop_chown(struct xfs_trans *,
89 struct xfs_inode *, struct xfs_dquot **, struct xfs_dquot *);
90extern int xfs_qm_vop_chown_reserve(struct xfs_trans *, struct xfs_inode *,
91 struct xfs_dquot *, struct xfs_dquot *,
92 struct xfs_dquot *, uint);
93extern int xfs_qm_dqattach(struct xfs_inode *, uint);
94extern int xfs_qm_dqattach_locked(struct xfs_inode *, uint);
95extern void xfs_qm_dqdetach(struct xfs_inode *);
96extern void xfs_qm_dqrele(struct xfs_dquot *);
97extern void xfs_qm_statvfs(struct xfs_inode *, struct kstatfs *);
98extern int xfs_qm_newmount(struct xfs_mount *, uint *, uint *);
99extern void xfs_qm_mount_quotas(struct xfs_mount *);
100extern void xfs_qm_unmount(struct xfs_mount *);
101extern void xfs_qm_unmount_quotas(struct xfs_mount *);
102
103#else
104static inline int
105xfs_qm_vop_dqalloc(struct xfs_inode *ip, xfs_dqid_t uid, xfs_dqid_t gid,
106 prid_t prid, uint flags, struct xfs_dquot **udqp,
107 struct xfs_dquot **gdqp, struct xfs_dquot **pdqp)
108{
109 *udqp = NULL;
110 *gdqp = NULL;
111 *pdqp = NULL;
112 return 0;
113}
114#define xfs_trans_dup_dqinfo(tp, tp2)
115#define xfs_trans_free_dqinfo(tp)
116#define xfs_trans_mod_dquot_byino(tp, ip, fields, delta)
117#define xfs_trans_apply_dquot_deltas(tp)
118#define xfs_trans_unreserve_and_mod_dquots(tp)
119static inline int xfs_trans_reserve_quota_nblks(struct xfs_trans *tp,
120 struct xfs_inode *ip, long nblks, long ninos, uint flags)
121{
122 return 0;
123}
124static inline int xfs_trans_reserve_quota_bydquots(struct xfs_trans *tp,
125 struct xfs_mount *mp, struct xfs_dquot *udqp,
126 struct xfs_dquot *gdqp, struct xfs_dquot *pdqp,
127 long nblks, long nions, uint flags)
128{
129 return 0;
130}
131#define xfs_qm_vop_create_dqattach(tp, ip, u, g, p)
132#define xfs_qm_vop_rename_dqattach(it) (0)
133#define xfs_qm_vop_chown(tp, ip, old, new) (NULL)
134#define xfs_qm_vop_chown_reserve(tp, ip, u, g, p, fl) (0)
135#define xfs_qm_dqattach(ip, fl) (0)
136#define xfs_qm_dqattach_locked(ip, fl) (0)
137#define xfs_qm_dqdetach(ip)
138#define xfs_qm_dqrele(d)
139#define xfs_qm_statvfs(ip, s)
140#define xfs_qm_newmount(mp, a, b) (0)
141#define xfs_qm_mount_quotas(mp)
142#define xfs_qm_unmount(mp)
143#define xfs_qm_unmount_quotas(mp)
144#endif /* CONFIG_XFS_QUOTA */
145
146#define xfs_trans_unreserve_quota_nblks(tp, ip, nblks, ninos, flags) \
147 xfs_trans_reserve_quota_nblks(tp, ip, -(nblks), -(ninos), flags)
148#define xfs_trans_reserve_quota(tp, mp, ud, gd, pd, nb, ni, f) \
149 xfs_trans_reserve_quota_bydquots(tp, mp, ud, gd, pd, nb, ni, \
150 f | XFS_QMOPT_RES_REGBLKS)
151
152extern int xfs_mount_reset_sbqflags(struct xfs_mount *);
153
154#endif /* __XFS_QUOTA_H__ */