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.
16 * 3. Neither the name of the University nor the names of its contributors
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
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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>
41 #define __DQUOT_VERSION__ "dquot_6.5.1"
42 #define __DQUOT_NUM_VERSION__ 6*10000+5*100+1
44 /* Size of blocks in which are counted size limits */
45 #define QUOTABLOCK_BITS 10
46 #define QUOTABLOCK_SIZE (1 << QUOTABLOCK_BITS)
48 /* Conversion routines from and to quota blocks */
49 #define qb2kb(x) ((x) << (QUOTABLOCK_BITS-10))
50 #define kb2qb(x) ((x) >> (QUOTABLOCK_BITS-10))
51 #define toqb(x) (((x) + QUOTABLOCK_SIZE - 1) >> QUOTABLOCK_BITS)
54 #define USRQUOTA 0 /* element used for user quotas */
55 #define GRPQUOTA 1 /* element used for group quotas */
58 * Definitions for the default names of the quotas files.
60 #define INITQFNAMES { \
61 "user", /* USRQUOTA */ \
62 "group", /* GRPQUOTA */ \
67 * Command definitions for the 'quotactl' system call.
68 * The commands are broken into a main command defined below
69 * and a subcommand that is used to convey the type of
70 * quota that is being manipulated (see above).
72 #define SUBCMDMASK 0x00ff
74 #define QCMD(cmd, type) (((cmd) << SUBCMDSHIFT) | ((type) & SUBCMDMASK))
76 #define Q_SYNC 0x800001 /* sync disk copy of a filesystems quotas */
77 #define Q_QUOTAON 0x800002 /* turn quotas on */
78 #define Q_QUOTAOFF 0x800003 /* turn quotas off */
79 #define Q_GETFMT 0x800004 /* get quota format used on given filesystem */
80 #define Q_GETINFO 0x800005 /* get information about quota files */
81 #define Q_SETINFO 0x800006 /* set information about quota files */
82 #define Q_GETQUOTA 0x800007 /* get user quota structure */
83 #define Q_SETQUOTA 0x800008 /* set user quota structure */
86 * Quota structure used for communication with userspace via quotactl
87 * Following flags are used to specify which fields are valid
95 #define QIF_LIMITS (QIF_BLIMITS | QIF_ILIMITS)
96 #define QIF_USAGE (QIF_SPACE | QIF_INODES)
97 #define QIF_TIMES (QIF_BTIME | QIF_ITIME)
98 #define QIF_ALL (QIF_LIMITS | QIF_USAGE | QIF_TIMES)
101 __u64 dqb_bhardlimit;
102 __u64 dqb_bsoftlimit;
104 __u64 dqb_ihardlimit;
105 __u64 dqb_isoftlimit;
113 * Structure used for setting quota information about file via quotactl
114 * Following flags are used to specify which fields are valid
119 #define IIF_ALL (IIF_BGRACE | IIF_IGRACE | IIF_FLAGS)
129 * Definitions for quota netlink interface
131 #define QUOTA_NL_NOWARN 0
132 #define QUOTA_NL_IHARDWARN 1 /* Inode hardlimit reached */
133 #define QUOTA_NL_ISOFTLONGWARN 2 /* Inode grace time expired */
134 #define QUOTA_NL_ISOFTWARN 3 /* Inode softlimit reached */
135 #define QUOTA_NL_BHARDWARN 4 /* Block hardlimit reached */
136 #define QUOTA_NL_BSOFTLONGWARN 5 /* Block grace time expired */
137 #define QUOTA_NL_BSOFTWARN 6 /* Block softlimit reached */
138 #define QUOTA_NL_IHARDBELOW 7 /* Usage got below inode hardlimit */
139 #define QUOTA_NL_ISOFTBELOW 8 /* Usage got below inode softlimit */
140 #define QUOTA_NL_BHARDBELOW 9 /* Usage got below block hardlimit */
141 #define QUOTA_NL_BSOFTBELOW 10 /* Usage got below block softlimit */
148 #define QUOTA_NL_C_MAX (__QUOTA_NL_C_MAX - 1)
153 QUOTA_NL_A_EXCESS_ID,
155 QUOTA_NL_A_DEV_MAJOR,
156 QUOTA_NL_A_DEV_MINOR,
157 QUOTA_NL_A_CAUSED_ID,
160 #define QUOTA_NL_A_MAX (__QUOTA_NL_A_MAX - 1)
164 #include <linux/list.h>
165 #include <linux/mutex.h>
166 #include <linux/rwsem.h>
167 #include <linux/spinlock.h>
168 #include <linux/wait.h>
170 #include <linux/dqblk_xfs.h>
171 #include <linux/dqblk_v1.h>
172 #include <linux/dqblk_v2.h>
174 #include <asm/atomic.h>
176 typedef __kernel_uid32_t qid_t; /* Type in which we store ids in memory */
177 typedef __u64 qsize_t; /* Type in which we store sizes */
179 extern spinlock_t dq_data_lock;
181 /* Maximal numbers of writes for quota operation (insert/delete/update)
182 * (over VFS all formats) */
183 #define DQUOT_INIT_ALLOC max(V1_INIT_ALLOC, V2_INIT_ALLOC)
184 #define DQUOT_INIT_REWRITE max(V1_INIT_REWRITE, V2_INIT_REWRITE)
185 #define DQUOT_DEL_ALLOC max(V1_DEL_ALLOC, V2_DEL_ALLOC)
186 #define DQUOT_DEL_REWRITE max(V1_DEL_REWRITE, V2_DEL_REWRITE)
189 * Data for one user/group kept in memory
192 __u32 dqb_bhardlimit; /* absolute limit on disk blks alloc */
193 __u32 dqb_bsoftlimit; /* preferred limit on disk blks */
194 qsize_t dqb_curspace; /* current used space */
195 __u32 dqb_ihardlimit; /* absolute limit on allocated inodes */
196 __u32 dqb_isoftlimit; /* preferred inode limit */
197 __u32 dqb_curinodes; /* current # allocated inodes */
198 time_t dqb_btime; /* time limit for excessive disk use */
199 time_t dqb_itime; /* time limit for excessive inode use */
203 * Data for one quotafile kept in memory
205 struct quota_format_type;
208 struct quota_format_type *dqi_format;
209 int dqi_fmt_id; /* Id of the dqi_format - used when turning
210 * quotas on after remount RW */
211 struct list_head dqi_dirty_list; /* List of dirty dquots */
212 unsigned long dqi_flags;
213 unsigned int dqi_bgrace;
214 unsigned int dqi_igrace;
215 qsize_t dqi_maxblimit;
216 qsize_t dqi_maxilimit;
218 struct v1_mem_dqinfo v1_i;
219 struct v2_mem_dqinfo v2_i;
225 #define DQF_MASK 0xffff /* Mask for format specific flags */
226 #define DQF_INFO_DIRTY_B 16
227 #define DQF_INFO_DIRTY (1 << DQF_INFO_DIRTY_B) /* Is info dirty? */
229 extern void mark_info_dirty(struct super_block *sb, int type);
230 static inline int info_dirty(struct mem_dqinfo *info)
232 return test_bit(DQF_INFO_DIRTY_B, &info->dqi_flags);
241 int allocated_dquots;
246 extern struct dqstats dqstats;
248 #define DQ_MOD_B 0 /* dquot modified since read */
249 #define DQ_BLKS_B 1 /* uid/gid has been warned about blk limit */
250 #define DQ_INODES_B 2 /* uid/gid has been warned about inode limit */
251 #define DQ_FAKE_B 3 /* no limits only usage */
252 #define DQ_READ_B 4 /* dquot was read into memory */
253 #define DQ_ACTIVE_B 5 /* dquot is active (dquot_release not called) */
256 struct hlist_node dq_hash; /* Hash list in memory */
257 struct list_head dq_inuse; /* List of all quotas */
258 struct list_head dq_free; /* Free list element */
259 struct list_head dq_dirty; /* List of dirty dquots */
260 struct mutex dq_lock; /* dquot IO lock */
261 atomic_t dq_count; /* Use count */
262 wait_queue_head_t dq_wait_unused; /* Wait queue for dquot to become unused */
263 struct super_block *dq_sb; /* superblock this applies to */
264 unsigned int dq_id; /* ID this applies to (uid, gid) */
265 loff_t dq_off; /* Offset of dquot on disk */
266 unsigned long dq_flags; /* See DQ_* */
267 short dq_type; /* Type of quota */
268 struct mem_dqblk dq_dqb; /* Diskquota usage */
271 #define NODQUOT (struct dquot *)NULL
276 /* Operations which must be implemented by each quota format */
277 struct quota_format_ops {
278 int (*check_quota_file)(struct super_block *sb, int type); /* Detect whether file is in our format */
279 int (*read_file_info)(struct super_block *sb, int type); /* Read main info about file - called on quotaon() */
280 int (*write_file_info)(struct super_block *sb, int type); /* Write main info about file */
281 int (*free_file_info)(struct super_block *sb, int type); /* Called on quotaoff() */
282 int (*read_dqblk)(struct dquot *dquot); /* Read structure for one user */
283 int (*commit_dqblk)(struct dquot *dquot); /* Write structure for one user */
284 int (*release_dqblk)(struct dquot *dquot); /* Called when last reference to dquot is being dropped */
287 /* Operations working with dquots */
288 struct dquot_operations {
289 int (*initialize) (struct inode *, int);
290 int (*drop) (struct inode *);
291 int (*alloc_space) (struct inode *, qsize_t, int);
292 int (*alloc_inode) (const struct inode *, unsigned long);
293 int (*free_space) (struct inode *, qsize_t);
294 int (*free_inode) (const struct inode *, unsigned long);
295 int (*transfer) (struct inode *, struct iattr *);
296 int (*write_dquot) (struct dquot *); /* Ordinary dquot write */
297 int (*acquire_dquot) (struct dquot *); /* Quota is going to be created on disk */
298 int (*release_dquot) (struct dquot *); /* Quota is going to be deleted from disk */
299 int (*mark_dirty) (struct dquot *); /* Dquot is marked dirty */
300 int (*write_info) (struct super_block *, int); /* Write of quota "superblock" */
303 /* Operations handling requests from userspace */
304 struct quotactl_ops {
305 int (*quota_on)(struct super_block *, int, int, char *, int);
306 int (*quota_off)(struct super_block *, int, int);
307 int (*quota_sync)(struct super_block *, int);
308 int (*get_info)(struct super_block *, int, struct if_dqinfo *);
309 int (*set_info)(struct super_block *, int, struct if_dqinfo *);
310 int (*get_dqblk)(struct super_block *, int, qid_t, struct if_dqblk *);
311 int (*set_dqblk)(struct super_block *, int, qid_t, struct if_dqblk *);
312 int (*get_xstate)(struct super_block *, struct fs_quota_stat *);
313 int (*set_xstate)(struct super_block *, unsigned int, int);
314 int (*get_xquota)(struct super_block *, int, qid_t, struct fs_disk_quota *);
315 int (*set_xquota)(struct super_block *, int, qid_t, struct fs_disk_quota *);
318 struct quota_format_type {
319 int qf_fmt_id; /* Quota format id */
320 struct quota_format_ops *qf_ops; /* Operations of format */
321 struct module *qf_owner; /* Module implementing quota format */
322 struct quota_format_type *qf_next;
325 #define DQUOT_USR_ENABLED 0x01 /* User diskquotas enabled */
326 #define DQUOT_GRP_ENABLED 0x02 /* Group diskquotas enabled */
327 #define DQUOT_USR_SUSPENDED 0x04 /* User diskquotas are off, but
328 * we have necessary info in
329 * memory to turn them on */
330 #define DQUOT_GRP_SUSPENDED 0x08 /* The same for group quotas */
333 unsigned int flags; /* Flags for diskquotas on this device */
334 struct mutex dqio_mutex; /* lock device while I/O in progress */
335 struct mutex dqonoff_mutex; /* Serialize quotaon & quotaoff */
336 struct rw_semaphore dqptr_sem; /* serialize ops using quota_info struct, pointers from inode to dquots */
337 struct inode *files[MAXQUOTAS]; /* inodes of quotafiles */
338 struct mem_dqinfo info[MAXQUOTAS]; /* Information for each quota type */
339 struct quota_format_ops *ops[MAXQUOTAS]; /* Operations for each type */
342 int register_quota_format(struct quota_format_type *fmt);
343 void unregister_quota_format(struct quota_format_type *fmt);
345 struct quota_module_name {
350 #define INIT_QUOTA_MODULE_NAMES {\
351 {QFMT_VFS_OLD, "quota_v1"},\
352 {QFMT_VFS_V0, "quota_v2"},\
357 # /* nodep */ include <sys/cdefs.h>
360 long quotactl __P ((unsigned int, const char *, int, caddr_t));
363 #endif /* __KERNEL__ */