1/* SPDX-License-Identifier: LGPL-2.1+ WITH Linux-syscall-note */
2/*
3 * Copyright (c) 1995-2001,2004 Silicon Graphics, Inc. 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 Lesser General Public License
7 * as published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it will 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 Lesser General Public License for more details.
13 *
14 * You should have received a copy of the GNU Lesset General Public License
15 * along with this program; if not, write to the Free Software Foundation,
16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
17 */
18#ifndef _LINUX_DQBLK_XFS_H
19#define _LINUX_DQBLK_XFS_H
20
21#include <linux/types.h>
22
23/*
24 * Disk quota - quotactl(2) commands for the XFS Quota Manager (XQM).
25 */
26
27#define XQM_CMD(x) (('X'<<8)+(x)) /* note: forms first QCMD argument */
28#define XQM_COMMAND(x) (((x) & (0xff<<8)) == ('X'<<8)) /* test if for XFS */
29
30#define XQM_USRQUOTA 0 /* system call user quota type */
31#define XQM_GRPQUOTA 1 /* system call group quota type */
32#define XQM_PRJQUOTA 2 /* system call project quota type */
33#define XQM_MAXQUOTAS 3
34
35#define Q_XQUOTAON XQM_CMD(1) /* enable accounting/enforcement */
36#define Q_XQUOTAOFF XQM_CMD(2) /* disable accounting/enforcement */
37#define Q_XGETQUOTA XQM_CMD(3) /* get disk limits and usage */
38#define Q_XSETQLIM XQM_CMD(4) /* set disk limits */
39#define Q_XGETQSTAT XQM_CMD(5) /* get quota subsystem status */
40#define Q_XQUOTARM XQM_CMD(6) /* free disk space used by dquots */
41#define Q_XQUOTASYNC XQM_CMD(7) /* delalloc flush, updates dquots */
42#define Q_XGETQSTATV XQM_CMD(8) /* newer version of get quota */
43#define Q_XGETNEXTQUOTA XQM_CMD(9) /* get disk limits and usage >= ID */
44
45/*
46 * fs_disk_quota structure:
47 *
48 * This contains the current quota information regarding a user/proj/group.
49 * It is 64-bit aligned, and all the blk units are in BBs (Basic Blocks) of
50 * 512 bytes.
51 */
52#define FS_DQUOT_VERSION 1 /* fs_disk_quota.d_version */
53typedef struct fs_disk_quota {
54 __s8 d_version; /* version of this structure */
55 __s8 d_flags; /* FS_{USER,PROJ,GROUP}_QUOTA */
56 __u16 d_fieldmask; /* field specifier */
57 __u32 d_id; /* user, project, or group ID */
58 __u64 d_blk_hardlimit;/* absolute limit on disk blks */
59 __u64 d_blk_softlimit;/* preferred limit on disk blks */
60 __u64 d_ino_hardlimit;/* maximum # allocated inodes */
61 __u64 d_ino_softlimit;/* preferred inode limit */
62 __u64 d_bcount; /* # disk blocks owned by the user */
63 __u64 d_icount; /* # inodes owned by the user */
64 __s32 d_itimer; /* Zero if within inode limits. If
65 * not, we refuse service at this time
66 * (in seconds since Unix epoch) */
67 __s32 d_btimer; /* similar to above; for disk blocks */
68 __u16 d_iwarns; /* # warnings issued wrt num inodes */
69 __u16 d_bwarns; /* # warnings issued wrt disk blocks */
70 __s8 d_itimer_hi; /* upper 8 bits of timer values */
71 __s8 d_btimer_hi;
72 __s8 d_rtbtimer_hi;
73 __s8 d_padding2; /* padding2 - for future use */
74 __u64 d_rtb_hardlimit;/* absolute limit on realtime blks */
75 __u64 d_rtb_softlimit;/* preferred limit on RT disk blks */
76 __u64 d_rtbcount; /* # realtime blocks owned */
77 __s32 d_rtbtimer; /* similar to above; for RT disk blks */
78 __u16 d_rtbwarns; /* # warnings issued wrt RT disk blks */
79 __s16 d_padding3; /* padding3 - for future use */
80 char d_padding4[8]; /* yet more padding */
81} fs_disk_quota_t;
82
83/*
84 * These fields are sent to Q_XSETQLIM to specify fields that need to change.
85 */
86#define FS_DQ_ISOFT (1<<0)
87#define FS_DQ_IHARD (1<<1)
88#define FS_DQ_BSOFT (1<<2)
89#define FS_DQ_BHARD (1<<3)
90#define FS_DQ_RTBSOFT (1<<4)
91#define FS_DQ_RTBHARD (1<<5)
92#define FS_DQ_LIMIT_MASK (FS_DQ_ISOFT | FS_DQ_IHARD | FS_DQ_BSOFT | \
93 FS_DQ_BHARD | FS_DQ_RTBSOFT | FS_DQ_RTBHARD)
94/*
95 * These timers can only be set in super user's dquot. For others, timers are
96 * automatically started and stopped. Superusers timer values set the limits
97 * for the rest. In case these values are zero, the DQ_{F,B}TIMELIMIT values
98 * defined below are used.
99 * These values also apply only to the d_fieldmask field for Q_XSETQLIM.
100 */
101#define FS_DQ_BTIMER (1<<6)
102#define FS_DQ_ITIMER (1<<7)
103#define FS_DQ_RTBTIMER (1<<8)
104#define FS_DQ_TIMER_MASK (FS_DQ_BTIMER | FS_DQ_ITIMER | FS_DQ_RTBTIMER)
105
106/*
107 * Warning counts are set in both super user's dquot and others. For others,
108 * warnings are set/cleared by the administrators (or automatically by going
109 * below the soft limit). Superusers warning values set the warning limits
110 * for the rest. In case these values are zero, the DQ_{F,B}WARNLIMIT values
111 * defined below are used.
112 * These values also apply only to the d_fieldmask field for Q_XSETQLIM.
113 */
114#define FS_DQ_BWARNS (1<<9)
115#define FS_DQ_IWARNS (1<<10)
116#define FS_DQ_RTBWARNS (1<<11)
117#define FS_DQ_WARNS_MASK (FS_DQ_BWARNS | FS_DQ_IWARNS | FS_DQ_RTBWARNS)
118
119/*
120 * Accounting values. These can only be set for filesystem with
121 * non-transactional quotas that require quotacheck(8) in userspace.
122 */
123#define FS_DQ_BCOUNT (1<<12)
124#define FS_DQ_ICOUNT (1<<13)
125#define FS_DQ_RTBCOUNT (1<<14)
126#define FS_DQ_ACCT_MASK (FS_DQ_BCOUNT | FS_DQ_ICOUNT | FS_DQ_RTBCOUNT)
127
128/*
129 * Quota expiration timestamps are 40-bit signed integers, with the upper 8
130 * bits encoded in the _hi fields.
131 */
132#define FS_DQ_BIGTIME (1<<15)
133
134/*
135 * Various flags related to quotactl(2).
136 */
137#define FS_QUOTA_UDQ_ACCT (1<<0) /* user quota accounting */
138#define FS_QUOTA_UDQ_ENFD (1<<1) /* user quota limits enforcement */
139#define FS_QUOTA_GDQ_ACCT (1<<2) /* group quota accounting */
140#define FS_QUOTA_GDQ_ENFD (1<<3) /* group quota limits enforcement */
141#define FS_QUOTA_PDQ_ACCT (1<<4) /* project quota accounting */
142#define FS_QUOTA_PDQ_ENFD (1<<5) /* project quota limits enforcement */
143
144#define FS_USER_QUOTA (1<<0) /* user quota type */
145#define FS_PROJ_QUOTA (1<<1) /* project quota type */
146#define FS_GROUP_QUOTA (1<<2) /* group quota type */
147
148/*
149 * fs_quota_stat is the struct returned in Q_XGETQSTAT for a given file system.
150 * Provides a centralized way to get meta information about the quota subsystem.
151 * eg. space taken up for user and group quotas, number of dquots currently
152 * incore.
153 */
154#define FS_QSTAT_VERSION 1 /* fs_quota_stat.qs_version */
155
156/*
157 * Some basic information about 'quota files'.
158 */
159typedef struct fs_qfilestat {
160 __u64 qfs_ino; /* inode number */
161 __u64 qfs_nblks; /* number of BBs 512-byte-blks */
162 __u32 qfs_nextents; /* number of extents */
163} fs_qfilestat_t;
164
165typedef struct fs_quota_stat {
166 __s8 qs_version; /* version number for future changes */
167 __u16 qs_flags; /* FS_QUOTA_{U,P,G}DQ_{ACCT,ENFD} */
168 __s8 qs_pad; /* unused */
169 fs_qfilestat_t qs_uquota; /* user quota storage information */
170 fs_qfilestat_t qs_gquota; /* group quota storage information */
171 __u32 qs_incoredqs; /* number of dquots incore */
172 __s32 qs_btimelimit; /* limit for blks timer */
173 __s32 qs_itimelimit; /* limit for inodes timer */
174 __s32 qs_rtbtimelimit;/* limit for rt blks timer */
175 __u16 qs_bwarnlimit; /* limit for num warnings */
176 __u16 qs_iwarnlimit; /* limit for num warnings */
177} fs_quota_stat_t;
178
179/*
180 * fs_quota_statv is used by Q_XGETQSTATV for a given file system. It provides
181 * a centralized way to get meta information about the quota subsystem. eg.
182 * space taken up for user, group, and project quotas, number of dquots
183 * currently incore.
184 *
185 * This version has proper versioning support with appropriate padding for
186 * future expansions, and ability to expand for future without creating any
187 * backward compatibility issues.
188 *
189 * Q_XGETQSTATV uses the passed in value of the requested version via
190 * fs_quota_statv.qs_version to determine the return data layout of
191 * fs_quota_statv. The kernel will fill the data fields relevant to that
192 * version.
193 *
194 * If kernel does not support user space caller specified version, EINVAL will
195 * be returned. User space caller can then reduce the version number and retry
196 * the same command.
197 */
198#define FS_QSTATV_VERSION1 1 /* fs_quota_statv.qs_version */
199/*
200 * Some basic information about 'quota files' for Q_XGETQSTATV command
201 */
202struct fs_qfilestatv {
203 __u64 qfs_ino; /* inode number */
204 __u64 qfs_nblks; /* number of BBs 512-byte-blks */
205 __u32 qfs_nextents; /* number of extents */
206 __u32 qfs_pad; /* pad for 8-byte alignment */
207};
208
209struct fs_quota_statv {
210 __s8 qs_version; /* version for future changes */
211 __u8 qs_pad1; /* pad for 16bit alignment */
212 __u16 qs_flags; /* FS_QUOTA_.* flags */
213 __u32 qs_incoredqs; /* number of dquots incore */
214 struct fs_qfilestatv qs_uquota; /* user quota information */
215 struct fs_qfilestatv qs_gquota; /* group quota information */
216 struct fs_qfilestatv qs_pquota; /* project quota information */
217 __s32 qs_btimelimit; /* limit for blks timer */
218 __s32 qs_itimelimit; /* limit for inodes timer */
219 __s32 qs_rtbtimelimit;/* limit for rt blks timer */
220 __u16 qs_bwarnlimit; /* limit for num warnings */
221 __u16 qs_iwarnlimit; /* limit for num warnings */
222 __u16 qs_rtbwarnlimit;/* limit for rt blks warnings */
223 __u16 qs_pad3;
224 __u32 qs_pad4;
225 __u64 qs_pad2[7]; /* for future proofing */
226};
227
228#endif /* _LINUX_DQBLK_XFS_H */