2 * Copyright (c) 1982, 1986 Regents of the University of California.
5 * This code is derived from software contributed to Berkeley by
6 * Robert Elz at The University of Melbourne.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
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17 * may be used to endorse or promote products derived from this software
18 * without specific prior written permission.
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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32 * Version: $Id: quota.h,v 2.0 1996/11/17 16:48:14 mvw Exp mvw $
38 #include <linux/errno.h>
39 #include <linux/types.h>
40 #include <linux/spinlock.h>
42 #define __DQUOT_VERSION__ "dquot_6.5.1"
43 #define __DQUOT_NUM_VERSION__ 6*10000+5*100+1
45 typedef __kernel_uid32_t qid_t; /* Type in which we store ids in memory */
46 typedef __u64 qsize_t; /* Type in which we store sizes */
48 extern spinlock_t dq_list_lock;
49 extern spinlock_t dq_data_lock;
51 /* Size of blocks in which are counted size limits */
52 #define QUOTABLOCK_BITS 10
53 #define QUOTABLOCK_SIZE (1 << QUOTABLOCK_BITS)
55 /* Conversion routines from and to quota blocks */
56 #define qb2kb(x) ((x) << (QUOTABLOCK_BITS-10))
57 #define kb2qb(x) ((x) >> (QUOTABLOCK_BITS-10))
58 #define toqb(x) (((x) + QUOTABLOCK_SIZE - 1) >> QUOTABLOCK_BITS)
61 #define USRQUOTA 0 /* element used for user quotas */
62 #define GRPQUOTA 1 /* element used for group quotas */
65 * Definitions for the default names of the quotas files.
67 #define INITQFNAMES { \
68 "user", /* USRQUOTA */ \
69 "group", /* GRPQUOTA */ \
74 * Command definitions for the 'quotactl' system call.
75 * The commands are broken into a main command defined below
76 * and a subcommand that is used to convey the type of
77 * quota that is being manipulated (see above).
79 #define SUBCMDMASK 0x00ff
81 #define QCMD(cmd, type) (((cmd) << SUBCMDSHIFT) | ((type) & SUBCMDMASK))
83 #define Q_SYNC 0x800001 /* sync disk copy of a filesystems quotas */
84 #define Q_QUOTAON 0x800002 /* turn quotas on */
85 #define Q_QUOTAOFF 0x800003 /* turn quotas off */
86 #define Q_GETFMT 0x800004 /* get quota format used on given filesystem */
87 #define Q_GETINFO 0x800005 /* get information about quota files */
88 #define Q_SETINFO 0x800006 /* set information about quota files */
89 #define Q_GETQUOTA 0x800007 /* get user quota structure */
90 #define Q_SETQUOTA 0x800008 /* set user quota structure */
93 * Quota structure used for communication with userspace via quotactl
94 * Following flags are used to specify which fields are valid
102 #define QIF_LIMITS (QIF_BLIMITS | QIF_ILIMITS)
103 #define QIF_USAGE (QIF_SPACE | QIF_INODES)
104 #define QIF_TIMES (QIF_BTIME | QIF_ITIME)
105 #define QIF_ALL (QIF_LIMITS | QIF_USAGE | QIF_TIMES)
108 __u64 dqb_bhardlimit;
109 __u64 dqb_bsoftlimit;
111 __u64 dqb_ihardlimit;
112 __u64 dqb_isoftlimit;
120 * Structure used for setting quota information about file via quotactl
121 * Following flags are used to specify which fields are valid
126 #define IIF_ALL (IIF_BGRACE | IIF_IGRACE | IIF_FLAGS)
137 #include <linux/dqblk_xfs.h>
138 #include <linux/dqblk_v1.h>
139 #include <linux/dqblk_v2.h>
142 * Data for one user/group kept in memory
145 __u32 dqb_bhardlimit; /* absolute limit on disk blks alloc */
146 __u32 dqb_bsoftlimit; /* preferred limit on disk blks */
147 qsize_t dqb_curspace; /* current used space */
148 __u32 dqb_ihardlimit; /* absolute limit on allocated inodes */
149 __u32 dqb_isoftlimit; /* preferred inode limit */
150 __u32 dqb_curinodes; /* current # allocated inodes */
151 time_t dqb_btime; /* time limit for excessive disk use */
152 time_t dqb_itime; /* time limit for excessive inode use */
156 * Data for one quotafile kept in memory
158 struct quota_format_type;
161 struct quota_format_type *dqi_format;
162 unsigned long dqi_flags;
163 unsigned int dqi_bgrace;
164 unsigned int dqi_igrace;
166 struct v1_mem_dqinfo v1_i;
167 struct v2_mem_dqinfo v2_i;
171 #define DQF_MASK 0xffff /* Mask for format specific flags */
172 #define DQF_INFO_DIRTY_B 16
173 #define DQF_ANY_DQUOT_DIRTY_B 17
174 #define DQF_INFO_DIRTY (1 << DQF_INFO_DIRTY_B) /* Is info dirty? */
175 #define DQF_ANY_DQUOT_DIRTY (1 << DQF_ANY_DQUOT_DIRTY B) /* Is any dquot dirty? */
177 extern inline void mark_info_dirty(struct mem_dqinfo *info)
179 set_bit(DQF_INFO_DIRTY_B, &info->dqi_flags);
182 #define info_dirty(info) test_bit(DQF_INFO_DIRTY_B, &(info)->dqi_flags)
183 #define info_any_dquot_dirty(info) test_bit(DQF_ANY_DQUOT_DIRTY_B, &(info)->dqi_flags)
184 #define info_any_dirty(info) (info_dirty(info) || info_any_dquot_dirty(info))
186 #define sb_dqopt(sb) (&(sb)->s_dquot)
194 int allocated_dquots;
199 extern struct dqstats dqstats;
201 #define NR_DQHASH 43 /* Just an arbitrary number */
205 #define DQ_INODES_B 2
208 #define DQ_MOD (1 << DQ_MOD_B) /* dquot modified since read */
209 #define DQ_BLKS (1 << DQ_BLKS_B) /* uid/gid has been warned about blk limit */
210 #define DQ_INODES (1 << DQ_INODES_B) /* uid/gid has been warned about inode limit */
211 #define DQ_FAKE (1 << DQ_FAKE_B) /* no limits only usage */
214 struct list_head dq_hash; /* Hash list in memory */
215 struct list_head dq_inuse; /* List of all quotas */
216 struct list_head dq_free; /* Free list element */
217 struct semaphore dq_lock; /* dquot IO lock */
218 atomic_t dq_count; /* Use count */
220 /* fields after this point are cleared when invalidating */
221 struct super_block *dq_sb; /* superblock this applies to */
222 unsigned int dq_id; /* ID this applies to (uid, gid) */
223 loff_t dq_off; /* Offset of dquot on disk */
224 unsigned long dq_flags; /* See DQ_* */
225 short dq_type; /* Type of quota */
226 struct mem_dqblk dq_dqb; /* Diskquota usage */
229 #define NODQUOT (struct dquot *)NULL
234 /* Operations which must be implemented by each quota format */
235 struct quota_format_ops {
236 int (*check_quota_file)(struct super_block *sb, int type); /* Detect whether file is in our format */
237 int (*read_file_info)(struct super_block *sb, int type); /* Read main info about file - called on quotaon() */
238 int (*write_file_info)(struct super_block *sb, int type); /* Write main info about file */
239 int (*free_file_info)(struct super_block *sb, int type); /* Called on quotaoff() */
240 int (*read_dqblk)(struct dquot *dquot); /* Read structure for one user */
241 int (*commit_dqblk)(struct dquot *dquot); /* Write (or delete) structure for one user */
244 /* Operations working with dquots */
245 struct dquot_operations {
246 void (*initialize) (struct inode *, int);
247 void (*drop) (struct inode *);
248 int (*alloc_space) (struct inode *, qsize_t, int);
249 int (*alloc_inode) (const struct inode *, unsigned long);
250 void (*free_space) (struct inode *, qsize_t);
251 void (*free_inode) (const struct inode *, unsigned long);
252 int (*transfer) (struct inode *, struct iattr *);
253 int (*sync_dquot) (struct dquot *);
256 /* Operations handling requests from userspace */
257 struct quotactl_ops {
258 int (*quota_on)(struct super_block *, int, int, char *);
259 int (*quota_off)(struct super_block *, int);
260 int (*quota_sync)(struct super_block *, int);
261 int (*get_info)(struct super_block *, int, struct if_dqinfo *);
262 int (*set_info)(struct super_block *, int, struct if_dqinfo *);
263 int (*get_dqblk)(struct super_block *, int, qid_t, struct if_dqblk *);
264 int (*set_dqblk)(struct super_block *, int, qid_t, struct if_dqblk *);
265 int (*get_xstate)(struct super_block *, struct fs_quota_stat *);
266 int (*set_xstate)(struct super_block *, unsigned int, int);
267 int (*get_xquota)(struct super_block *, int, qid_t, struct fs_disk_quota *);
268 int (*set_xquota)(struct super_block *, int, qid_t, struct fs_disk_quota *);
271 struct quota_format_type {
272 int qf_fmt_id; /* Quota format id */
273 struct quota_format_ops *qf_ops; /* Operations of format */
274 struct module *qf_owner; /* Module implementing quota format */
275 struct quota_format_type *qf_next;
278 #define DQUOT_USR_ENABLED 0x01 /* User diskquotas enabled */
279 #define DQUOT_GRP_ENABLED 0x02 /* Group diskquotas enabled */
282 unsigned int flags; /* Flags for diskquotas on this device */
283 struct semaphore dqio_sem; /* lock device while I/O in progress */
284 struct semaphore dqonoff_sem; /* Serialize quotaon & quotaoff */
285 struct rw_semaphore dqptr_sem; /* serialize ops using quota_info struct, pointers from inode to dquots */
286 struct file *files[MAXQUOTAS]; /* fp's to quotafiles */
287 struct mem_dqinfo info[MAXQUOTAS]; /* Information for each quota type */
288 struct quota_format_ops *ops[MAXQUOTAS]; /* Operations for each type */
291 /* Inline would be better but we need to dereference super_block which is not defined yet */
292 #define mark_dquot_dirty(dquot) do {\
293 set_bit(DQF_ANY_DQUOT_DIRTY_B, &(sb_dqopt((dquot)->dq_sb)->info[(dquot)->dq_type].dqi_flags));\
294 set_bit(DQ_MOD_B, &(dquot)->dq_flags);\
297 #define dquot_dirty(dquot) test_bit(DQ_MOD_B, &(dquot)->dq_flags)
299 #define sb_has_quota_enabled(sb, type) ((type)==USRQUOTA ? \
300 (sb_dqopt(sb)->flags & DQUOT_USR_ENABLED) : (sb_dqopt(sb)->flags & DQUOT_GRP_ENABLED))
302 #define sb_any_quota_enabled(sb) (sb_has_quota_enabled(sb, USRQUOTA) | \
303 sb_has_quota_enabled(sb, GRPQUOTA))
305 int register_quota_format(struct quota_format_type *fmt);
306 void unregister_quota_format(struct quota_format_type *fmt);
307 void init_dquot_operations(struct dquot_operations *fsdqops);
309 struct quota_module_name {
314 #define INIT_QUOTA_MODULE_NAMES {\
315 {QFMT_VFS_OLD, "quota_v1"},\
316 {QFMT_VFS_V0, "quota_v2"},\
321 # /* nodep */ include <sys/cdefs.h>
324 long quotactl __P ((unsigned int, const char *, int, caddr_t));
327 #endif /* __KERNEL__ */