Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 1982, 1986 Regents of the University of California. |
| 3 | * All rights reserved. |
| 4 | * |
| 5 | * This code is derived from software contributed to Berkeley by |
| 6 | * Robert Elz at The University of Melbourne. |
| 7 | * |
| 8 | * Redistribution and use in source and binary forms, with or without |
| 9 | * modification, are permitted provided that the following conditions |
| 10 | * are met: |
| 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. |
| 19 | * |
| 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 |
| 30 | * SUCH DAMAGE. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 31 | */ |
| 32 | |
| 33 | #ifndef _LINUX_QUOTA_ |
| 34 | #define _LINUX_QUOTA_ |
| 35 | |
| 36 | #include <linux/errno.h> |
| 37 | #include <linux/types.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | |
Jan Kara | 571b46e | 2008-10-30 09:17:52 +0100 | [diff] [blame] | 39 | #define __DQUOT_VERSION__ "dquot_6.5.2" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | #define MAXQUOTAS 2 |
| 42 | #define USRQUOTA 0 /* element used for user quotas */ |
| 43 | #define GRPQUOTA 1 /* element used for group quotas */ |
| 44 | |
| 45 | /* |
| 46 | * Definitions for the default names of the quotas files. |
| 47 | */ |
| 48 | #define INITQFNAMES { \ |
| 49 | "user", /* USRQUOTA */ \ |
| 50 | "group", /* GRPQUOTA */ \ |
| 51 | "undefined", \ |
| 52 | }; |
| 53 | |
| 54 | /* |
| 55 | * Command definitions for the 'quotactl' system call. |
| 56 | * The commands are broken into a main command defined below |
| 57 | * and a subcommand that is used to convey the type of |
| 58 | * quota that is being manipulated (see above). |
| 59 | */ |
| 60 | #define SUBCMDMASK 0x00ff |
| 61 | #define SUBCMDSHIFT 8 |
| 62 | #define QCMD(cmd, type) (((cmd) << SUBCMDSHIFT) | ((type) & SUBCMDMASK)) |
| 63 | |
| 64 | #define Q_SYNC 0x800001 /* sync disk copy of a filesystems quotas */ |
| 65 | #define Q_QUOTAON 0x800002 /* turn quotas on */ |
| 66 | #define Q_QUOTAOFF 0x800003 /* turn quotas off */ |
| 67 | #define Q_GETFMT 0x800004 /* get quota format used on given filesystem */ |
| 68 | #define Q_GETINFO 0x800005 /* get information about quota files */ |
| 69 | #define Q_SETINFO 0x800006 /* set information about quota files */ |
| 70 | #define Q_GETQUOTA 0x800007 /* get user quota structure */ |
| 71 | #define Q_SETQUOTA 0x800008 /* set user quota structure */ |
| 72 | |
Jan Kara | 5cd9d5b | 2008-11-25 15:31:31 +0100 | [diff] [blame] | 73 | /* Quota format type IDs */ |
| 74 | #define QFMT_VFS_OLD 1 |
| 75 | #define QFMT_VFS_V0 2 |
Jan Kara | 3067393 | 2009-11-30 22:17:41 +0100 | [diff] [blame] | 76 | #define QFMT_OCFS2 3 |
Jan Kara | 498c601 | 2009-11-16 18:09:47 +0100 | [diff] [blame] | 77 | #define QFMT_VFS_V1 4 |
Jan Kara | 5cd9d5b | 2008-11-25 15:31:31 +0100 | [diff] [blame] | 78 | |
Jan Kara | 1209546 | 2008-08-20 14:45:12 +0200 | [diff] [blame] | 79 | /* Size of block in which space limits are passed through the quota |
| 80 | * interface */ |
| 81 | #define QIF_DQBLKSIZE_BITS 10 |
| 82 | #define QIF_DQBLKSIZE (1 << QIF_DQBLKSIZE_BITS) |
| 83 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 84 | /* |
| 85 | * Quota structure used for communication with userspace via quotactl |
| 86 | * Following flags are used to specify which fields are valid |
| 87 | */ |
Jan Kara | 4d59bce | 2008-10-02 16:48:10 +0200 | [diff] [blame] | 88 | enum { |
| 89 | QIF_BLIMITS_B = 0, |
| 90 | QIF_SPACE_B, |
| 91 | QIF_ILIMITS_B, |
| 92 | QIF_INODES_B, |
| 93 | QIF_BTIME_B, |
| 94 | QIF_ITIME_B, |
| 95 | }; |
| 96 | |
| 97 | #define QIF_BLIMITS (1 << QIF_BLIMITS_B) |
| 98 | #define QIF_SPACE (1 << QIF_SPACE_B) |
| 99 | #define QIF_ILIMITS (1 << QIF_ILIMITS_B) |
| 100 | #define QIF_INODES (1 << QIF_INODES_B) |
| 101 | #define QIF_BTIME (1 << QIF_BTIME_B) |
| 102 | #define QIF_ITIME (1 << QIF_ITIME_B) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 103 | #define QIF_LIMITS (QIF_BLIMITS | QIF_ILIMITS) |
| 104 | #define QIF_USAGE (QIF_SPACE | QIF_INODES) |
| 105 | #define QIF_TIMES (QIF_BTIME | QIF_ITIME) |
| 106 | #define QIF_ALL (QIF_LIMITS | QIF_USAGE | QIF_TIMES) |
| 107 | |
| 108 | struct if_dqblk { |
| 109 | __u64 dqb_bhardlimit; |
| 110 | __u64 dqb_bsoftlimit; |
| 111 | __u64 dqb_curspace; |
| 112 | __u64 dqb_ihardlimit; |
| 113 | __u64 dqb_isoftlimit; |
| 114 | __u64 dqb_curinodes; |
| 115 | __u64 dqb_btime; |
| 116 | __u64 dqb_itime; |
| 117 | __u32 dqb_valid; |
| 118 | }; |
| 119 | |
| 120 | /* |
| 121 | * Structure used for setting quota information about file via quotactl |
| 122 | * Following flags are used to specify which fields are valid |
| 123 | */ |
| 124 | #define IIF_BGRACE 1 |
| 125 | #define IIF_IGRACE 2 |
| 126 | #define IIF_FLAGS 4 |
| 127 | #define IIF_ALL (IIF_BGRACE | IIF_IGRACE | IIF_FLAGS) |
| 128 | |
| 129 | struct if_dqinfo { |
| 130 | __u64 dqi_bgrace; |
| 131 | __u64 dqi_igrace; |
| 132 | __u32 dqi_flags; |
| 133 | __u32 dqi_valid; |
| 134 | }; |
| 135 | |
Jan Kara | 8e89346 | 2007-10-16 23:29:31 -0700 | [diff] [blame] | 136 | /* |
| 137 | * Definitions for quota netlink interface |
| 138 | */ |
| 139 | #define QUOTA_NL_NOWARN 0 |
| 140 | #define QUOTA_NL_IHARDWARN 1 /* Inode hardlimit reached */ |
| 141 | #define QUOTA_NL_ISOFTLONGWARN 2 /* Inode grace time expired */ |
| 142 | #define QUOTA_NL_ISOFTWARN 3 /* Inode softlimit reached */ |
| 143 | #define QUOTA_NL_BHARDWARN 4 /* Block hardlimit reached */ |
| 144 | #define QUOTA_NL_BSOFTLONGWARN 5 /* Block grace time expired */ |
| 145 | #define QUOTA_NL_BSOFTWARN 6 /* Block softlimit reached */ |
Jan Kara | 657d3bf | 2008-07-25 01:46:52 -0700 | [diff] [blame] | 146 | #define QUOTA_NL_IHARDBELOW 7 /* Usage got below inode hardlimit */ |
| 147 | #define QUOTA_NL_ISOFTBELOW 8 /* Usage got below inode softlimit */ |
| 148 | #define QUOTA_NL_BHARDBELOW 9 /* Usage got below block hardlimit */ |
| 149 | #define QUOTA_NL_BSOFTBELOW 10 /* Usage got below block softlimit */ |
Jan Kara | 8e89346 | 2007-10-16 23:29:31 -0700 | [diff] [blame] | 150 | |
| 151 | enum { |
| 152 | QUOTA_NL_C_UNSPEC, |
| 153 | QUOTA_NL_C_WARNING, |
| 154 | __QUOTA_NL_C_MAX, |
| 155 | }; |
| 156 | #define QUOTA_NL_C_MAX (__QUOTA_NL_C_MAX - 1) |
| 157 | |
| 158 | enum { |
| 159 | QUOTA_NL_A_UNSPEC, |
| 160 | QUOTA_NL_A_QTYPE, |
| 161 | QUOTA_NL_A_EXCESS_ID, |
| 162 | QUOTA_NL_A_WARNING, |
| 163 | QUOTA_NL_A_DEV_MAJOR, |
| 164 | QUOTA_NL_A_DEV_MINOR, |
| 165 | QUOTA_NL_A_CAUSED_ID, |
| 166 | __QUOTA_NL_A_MAX, |
| 167 | }; |
| 168 | #define QUOTA_NL_A_MAX (__QUOTA_NL_A_MAX - 1) |
| 169 | |
| 170 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 171 | #ifdef __KERNEL__ |
Matthew Wilcox | 8b91de2 | 2008-02-26 09:53:20 -0500 | [diff] [blame] | 172 | #include <linux/list.h> |
David Woodhouse | 0409d3a | 2006-04-25 14:52:13 +0100 | [diff] [blame] | 173 | #include <linux/mutex.h> |
Matthew Wilcox | 8b91de2 | 2008-02-26 09:53:20 -0500 | [diff] [blame] | 174 | #include <linux/rwsem.h> |
| 175 | #include <linux/spinlock.h> |
| 176 | #include <linux/wait.h> |
Dmitry Monakhov | dde9588 | 2010-04-26 20:03:33 +0400 | [diff] [blame] | 177 | #include <linux/percpu.h> |
| 178 | #include <linux/smp.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 179 | |
| 180 | #include <linux/dqblk_xfs.h> |
| 181 | #include <linux/dqblk_v1.h> |
| 182 | #include <linux/dqblk_v2.h> |
| 183 | |
Matthew Wilcox | 8b91de2 | 2008-02-26 09:53:20 -0500 | [diff] [blame] | 184 | #include <asm/atomic.h> |
| 185 | |
Jan Kara | 74abb98 | 2008-07-25 01:46:51 -0700 | [diff] [blame] | 186 | typedef __kernel_uid32_t qid_t; /* Type in which we store ids in memory */ |
Jan Kara | db49d2d | 2008-10-01 18:21:39 +0200 | [diff] [blame] | 187 | typedef long long qsize_t; /* Type in which we store sizes */ |
Jan Kara | 74abb98 | 2008-07-25 01:46:51 -0700 | [diff] [blame] | 188 | |
Mike Frysinger | acd64b7 | 2007-05-08 00:31:51 -0700 | [diff] [blame] | 189 | extern spinlock_t dq_data_lock; |
| 190 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 191 | /* Maximal numbers of writes for quota operation (insert/delete/update) |
Jan Kara | 4e5117b | 2005-06-23 22:01:03 -0700 | [diff] [blame] | 192 | * (over VFS all formats) */ |
| 193 | #define DQUOT_INIT_ALLOC max(V1_INIT_ALLOC, V2_INIT_ALLOC) |
| 194 | #define DQUOT_INIT_REWRITE max(V1_INIT_REWRITE, V2_INIT_REWRITE) |
| 195 | #define DQUOT_DEL_ALLOC max(V1_DEL_ALLOC, V2_DEL_ALLOC) |
| 196 | #define DQUOT_DEL_REWRITE max(V1_DEL_REWRITE, V2_DEL_REWRITE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 197 | |
| 198 | /* |
| 199 | * Data for one user/group kept in memory |
| 200 | */ |
| 201 | struct mem_dqblk { |
Jan Kara | 1209546 | 2008-08-20 14:45:12 +0200 | [diff] [blame] | 202 | qsize_t dqb_bhardlimit; /* absolute limit on disk blks alloc */ |
| 203 | qsize_t dqb_bsoftlimit; /* preferred limit on disk blks */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 204 | qsize_t dqb_curspace; /* current used space */ |
Mingming Cao | f18df22 | 2009-01-13 16:43:09 +0100 | [diff] [blame] | 205 | qsize_t dqb_rsvspace; /* current reserved space for delalloc*/ |
Jan Kara | 1209546 | 2008-08-20 14:45:12 +0200 | [diff] [blame] | 206 | qsize_t dqb_ihardlimit; /* absolute limit on allocated inodes */ |
| 207 | qsize_t dqb_isoftlimit; /* preferred inode limit */ |
| 208 | qsize_t dqb_curinodes; /* current # allocated inodes */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 209 | time_t dqb_btime; /* time limit for excessive disk use */ |
| 210 | time_t dqb_itime; /* time limit for excessive inode use */ |
| 211 | }; |
| 212 | |
| 213 | /* |
| 214 | * Data for one quotafile kept in memory |
| 215 | */ |
| 216 | struct quota_format_type; |
| 217 | |
| 218 | struct mem_dqinfo { |
| 219 | struct quota_format_type *dqi_format; |
Jan Kara | 0ff5af8 | 2008-04-28 02:14:33 -0700 | [diff] [blame] | 220 | int dqi_fmt_id; /* Id of the dqi_format - used when turning |
| 221 | * quotas on after remount RW */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 222 | struct list_head dqi_dirty_list; /* List of dirty dquots */ |
| 223 | unsigned long dqi_flags; |
| 224 | unsigned int dqi_bgrace; |
| 225 | unsigned int dqi_igrace; |
Andrew Perepechko | 338bf9a | 2008-04-28 02:14:31 -0700 | [diff] [blame] | 226 | qsize_t dqi_maxblimit; |
| 227 | qsize_t dqi_maxilimit; |
Jan Kara | e3d4d56 | 2008-10-02 18:44:14 +0200 | [diff] [blame] | 228 | void *dqi_priv; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 229 | }; |
| 230 | |
| 231 | struct super_block; |
| 232 | |
| 233 | #define DQF_MASK 0xffff /* Mask for format specific flags */ |
| 234 | #define DQF_INFO_DIRTY_B 16 |
| 235 | #define DQF_INFO_DIRTY (1 << DQF_INFO_DIRTY_B) /* Is info dirty? */ |
| 236 | |
| 237 | extern void mark_info_dirty(struct super_block *sb, int type); |
Jan Kara | 03b0634 | 2008-07-25 01:46:52 -0700 | [diff] [blame] | 238 | static inline int info_dirty(struct mem_dqinfo *info) |
| 239 | { |
| 240 | return test_bit(DQF_INFO_DIRTY_B, &info->dqi_flags); |
| 241 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 242 | |
Dmitry Monakhov | dde9588 | 2010-04-26 20:03:33 +0400 | [diff] [blame] | 243 | enum { |
| 244 | DQST_LOOKUPS, |
| 245 | DQST_DROPS, |
| 246 | DQST_READS, |
| 247 | DQST_WRITES, |
| 248 | DQST_CACHE_HITS, |
| 249 | DQST_ALLOC_DQUOTS, |
| 250 | DQST_FREE_DQUOTS, |
| 251 | DQST_SYNCS, |
| 252 | _DQST_DQSTAT_LAST |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 253 | }; |
| 254 | |
Dmitry Monakhov | dde9588 | 2010-04-26 20:03:33 +0400 | [diff] [blame] | 255 | struct dqstats { |
| 256 | int stat[_DQST_DQSTAT_LAST]; |
| 257 | }; |
| 258 | |
| 259 | extern struct dqstats *dqstats_pcpu; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 260 | extern struct dqstats dqstats; |
| 261 | |
Dmitry Monakhov | dde9588 | 2010-04-26 20:03:33 +0400 | [diff] [blame] | 262 | static inline void dqstats_inc(unsigned int type) |
| 263 | { |
| 264 | #ifdef CONFIG_SMP |
| 265 | per_cpu_ptr(dqstats_pcpu, smp_processor_id())->stat[type]++; |
| 266 | #else |
| 267 | dqstats.stat[type]++; |
| 268 | #endif |
| 269 | } |
| 270 | |
| 271 | static inline void dqstats_dec(unsigned int type) |
| 272 | { |
| 273 | #ifdef CONFIG_SMP |
| 274 | per_cpu_ptr(dqstats_pcpu, smp_processor_id())->stat[type]--; |
| 275 | #else |
| 276 | dqstats.stat[type]--; |
| 277 | #endif |
| 278 | } |
| 279 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 280 | #define DQ_MOD_B 0 /* dquot modified since read */ |
| 281 | #define DQ_BLKS_B 1 /* uid/gid has been warned about blk limit */ |
| 282 | #define DQ_INODES_B 2 /* uid/gid has been warned about inode limit */ |
| 283 | #define DQ_FAKE_B 3 /* no limits only usage */ |
| 284 | #define DQ_READ_B 4 /* dquot was read into memory */ |
| 285 | #define DQ_ACTIVE_B 5 /* dquot is active (dquot_release not called) */ |
Jan Kara | 4d59bce | 2008-10-02 16:48:10 +0200 | [diff] [blame] | 286 | #define DQ_LASTSET_B 6 /* Following 6 bits (see QIF_) are reserved\ |
| 287 | * for the mask of entries set via SETQUOTA\ |
| 288 | * quotactl. They are set under dq_data_lock\ |
| 289 | * and the quota format handling dquot can\ |
| 290 | * clear them when it sees fit. */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 291 | |
| 292 | struct dquot { |
| 293 | struct hlist_node dq_hash; /* Hash list in memory */ |
| 294 | struct list_head dq_inuse; /* List of all quotas */ |
| 295 | struct list_head dq_free; /* Free list element */ |
| 296 | struct list_head dq_dirty; /* List of dirty dquots */ |
Ingo Molnar | d3be915 | 2006-03-23 03:00:29 -0800 | [diff] [blame] | 297 | struct mutex dq_lock; /* dquot IO lock */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 298 | atomic_t dq_count; /* Use count */ |
| 299 | wait_queue_head_t dq_wait_unused; /* Wait queue for dquot to become unused */ |
| 300 | struct super_block *dq_sb; /* superblock this applies to */ |
| 301 | unsigned int dq_id; /* ID this applies to (uid, gid) */ |
| 302 | loff_t dq_off; /* Offset of dquot on disk */ |
| 303 | unsigned long dq_flags; /* See DQ_* */ |
| 304 | short dq_type; /* Type of quota */ |
| 305 | struct mem_dqblk dq_dqb; /* Diskquota usage */ |
| 306 | }; |
| 307 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 308 | /* Operations which must be implemented by each quota format */ |
| 309 | struct quota_format_ops { |
| 310 | int (*check_quota_file)(struct super_block *sb, int type); /* Detect whether file is in our format */ |
| 311 | int (*read_file_info)(struct super_block *sb, int type); /* Read main info about file - called on quotaon() */ |
| 312 | int (*write_file_info)(struct super_block *sb, int type); /* Write main info about file */ |
| 313 | int (*free_file_info)(struct super_block *sb, int type); /* Called on quotaoff() */ |
| 314 | int (*read_dqblk)(struct dquot *dquot); /* Read structure for one user */ |
| 315 | int (*commit_dqblk)(struct dquot *dquot); /* Write structure for one user */ |
| 316 | int (*release_dqblk)(struct dquot *dquot); /* Called when last reference to dquot is being dropped */ |
| 317 | }; |
| 318 | |
| 319 | /* Operations working with dquots */ |
| 320 | struct dquot_operations { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 321 | int (*write_dquot) (struct dquot *); /* Ordinary dquot write */ |
Jan Kara | 74f783a | 2008-08-19 14:51:22 +0200 | [diff] [blame] | 322 | struct dquot *(*alloc_dquot)(struct super_block *, int); /* Allocate memory for new dquot */ |
| 323 | void (*destroy_dquot)(struct dquot *); /* Free memory for dquot */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 324 | int (*acquire_dquot) (struct dquot *); /* Quota is going to be created on disk */ |
| 325 | int (*release_dquot) (struct dquot *); /* Quota is going to be deleted from disk */ |
| 326 | int (*mark_dirty) (struct dquot *); /* Dquot is marked dirty */ |
| 327 | int (*write_info) (struct super_block *, int); /* Write of quota "superblock" */ |
Dmitry Monakhov | fd8fbfc | 2009-12-14 15:21:13 +0300 | [diff] [blame] | 328 | /* get reserved quota for delayed alloc, value returned is managed by |
| 329 | * quota code only */ |
| 330 | qsize_t *(*get_reserved_space) (struct inode *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 331 | }; |
| 332 | |
| 333 | /* Operations handling requests from userspace */ |
| 334 | struct quotactl_ops { |
Jan Kara | 0ff5af8 | 2008-04-28 02:14:33 -0700 | [diff] [blame] | 335 | int (*quota_on)(struct super_block *, int, int, char *, int); |
| 336 | int (*quota_off)(struct super_block *, int, int); |
Christoph Hellwig | 5fb324a | 2010-02-16 03:44:52 -0500 | [diff] [blame] | 337 | int (*quota_sync)(struct super_block *, int, int); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 338 | int (*get_info)(struct super_block *, int, struct if_dqinfo *); |
| 339 | int (*set_info)(struct super_block *, int, struct if_dqinfo *); |
| 340 | int (*get_dqblk)(struct super_block *, int, qid_t, struct if_dqblk *); |
| 341 | int (*set_dqblk)(struct super_block *, int, qid_t, struct if_dqblk *); |
| 342 | int (*get_xstate)(struct super_block *, struct fs_quota_stat *); |
| 343 | int (*set_xstate)(struct super_block *, unsigned int, int); |
| 344 | int (*get_xquota)(struct super_block *, int, qid_t, struct fs_disk_quota *); |
| 345 | int (*set_xquota)(struct super_block *, int, qid_t, struct fs_disk_quota *); |
| 346 | }; |
| 347 | |
| 348 | struct quota_format_type { |
| 349 | int qf_fmt_id; /* Quota format id */ |
Alexey Dobriyan | 1472da5 | 2009-10-16 15:26:03 +0400 | [diff] [blame] | 350 | const struct quota_format_ops *qf_ops; /* Operations of format */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 351 | struct module *qf_owner; /* Module implementing quota format */ |
| 352 | struct quota_format_type *qf_next; |
| 353 | }; |
| 354 | |
Jan Kara | f55abc0 | 2008-08-20 17:50:32 +0200 | [diff] [blame] | 355 | /* Quota state flags - they actually come in two flavors - for users and groups */ |
| 356 | enum { |
| 357 | _DQUOT_USAGE_ENABLED = 0, /* Track disk usage for users */ |
| 358 | _DQUOT_LIMITS_ENABLED, /* Enforce quota limits for users */ |
| 359 | _DQUOT_SUSPENDED, /* User diskquotas are off, but |
Jan Kara | 0ff5af8 | 2008-04-28 02:14:33 -0700 | [diff] [blame] | 360 | * we have necessary info in |
| 361 | * memory to turn them on */ |
Jan Kara | f55abc0 | 2008-08-20 17:50:32 +0200 | [diff] [blame] | 362 | _DQUOT_STATE_FLAGS |
| 363 | }; |
| 364 | #define DQUOT_USAGE_ENABLED (1 << _DQUOT_USAGE_ENABLED) |
| 365 | #define DQUOT_LIMITS_ENABLED (1 << _DQUOT_LIMITS_ENABLED) |
| 366 | #define DQUOT_SUSPENDED (1 << _DQUOT_SUSPENDED) |
| 367 | #define DQUOT_STATE_FLAGS (DQUOT_USAGE_ENABLED | DQUOT_LIMITS_ENABLED | \ |
| 368 | DQUOT_SUSPENDED) |
Jan Kara | ca785ec | 2008-09-30 17:53:37 +0200 | [diff] [blame] | 369 | /* Other quota flags */ |
Dmitry Monakhov | ad1e6e8 | 2010-02-16 08:31:49 +0300 | [diff] [blame] | 370 | #define DQUOT_STATE_LAST (_DQUOT_STATE_FLAGS * MAXQUOTAS) |
| 371 | #define DQUOT_QUOTA_SYS_FILE (1 << DQUOT_STATE_LAST) |
| 372 | /* Quota file is a special |
Jan Kara | ca785ec | 2008-09-30 17:53:37 +0200 | [diff] [blame] | 373 | * system file and user cannot |
| 374 | * touch it. Filesystem is |
| 375 | * responsible for setting |
| 376 | * S_NOQUOTA, S_NOATIME flags |
| 377 | */ |
Dmitry Monakhov | ad1e6e8 | 2010-02-16 08:31:49 +0300 | [diff] [blame] | 378 | #define DQUOT_NEGATIVE_USAGE (1 << (DQUOT_STATE_LAST + 1)) |
| 379 | /* Allow negative quota usage */ |
Jan Kara | f55abc0 | 2008-08-20 17:50:32 +0200 | [diff] [blame] | 380 | |
| 381 | static inline unsigned int dquot_state_flag(unsigned int flags, int type) |
| 382 | { |
Dmitry Monakhov | ad1e6e8 | 2010-02-16 08:31:49 +0300 | [diff] [blame] | 383 | return flags << _DQUOT_STATE_FLAGS * type; |
Jan Kara | f55abc0 | 2008-08-20 17:50:32 +0200 | [diff] [blame] | 384 | } |
| 385 | |
| 386 | static inline unsigned int dquot_generic_flag(unsigned int flags, int type) |
| 387 | { |
Dmitry Monakhov | ad1e6e8 | 2010-02-16 08:31:49 +0300 | [diff] [blame] | 388 | return (flags >> _DQUOT_STATE_FLAGS * type) & DQUOT_STATE_FLAGS; |
Jan Kara | f55abc0 | 2008-08-20 17:50:32 +0200 | [diff] [blame] | 389 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 390 | |
Steven Whitehouse | 86e931a | 2009-09-28 12:35:17 +0100 | [diff] [blame] | 391 | #ifdef CONFIG_QUOTA_NETLINK_INTERFACE |
| 392 | extern void quota_send_warning(short type, unsigned int id, dev_t dev, |
| 393 | const char warntype); |
| 394 | #else |
| 395 | static inline void quota_send_warning(short type, unsigned int id, dev_t dev, |
| 396 | const char warntype) |
| 397 | { |
| 398 | return; |
| 399 | } |
| 400 | #endif /* CONFIG_QUOTA_NETLINK_INTERFACE */ |
| 401 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 402 | struct quota_info { |
| 403 | unsigned int flags; /* Flags for diskquotas on this device */ |
Ingo Molnar | d3be915 | 2006-03-23 03:00:29 -0800 | [diff] [blame] | 404 | struct mutex dqio_mutex; /* lock device while I/O in progress */ |
| 405 | struct mutex dqonoff_mutex; /* Serialize quotaon & quotaoff */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 406 | struct rw_semaphore dqptr_sem; /* serialize ops using quota_info struct, pointers from inode to dquots */ |
| 407 | struct inode *files[MAXQUOTAS]; /* inodes of quotafiles */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 408 | struct mem_dqinfo info[MAXQUOTAS]; /* Information for each quota type */ |
Alexey Dobriyan | 1472da5 | 2009-10-16 15:26:03 +0400 | [diff] [blame] | 409 | const struct quota_format_ops *ops[MAXQUOTAS]; /* Operations for each type */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 410 | }; |
| 411 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 412 | int register_quota_format(struct quota_format_type *fmt); |
| 413 | void unregister_quota_format(struct quota_format_type *fmt); |
| 414 | |
| 415 | struct quota_module_name { |
| 416 | int qm_fmt_id; |
| 417 | char *qm_mod_name; |
| 418 | }; |
| 419 | |
| 420 | #define INIT_QUOTA_MODULE_NAMES {\ |
| 421 | {QFMT_VFS_OLD, "quota_v1"},\ |
| 422 | {QFMT_VFS_V0, "quota_v2"},\ |
| 423 | {0, NULL}} |
| 424 | |
| 425 | #else |
| 426 | |
| 427 | # /* nodep */ include <sys/cdefs.h> |
| 428 | |
| 429 | __BEGIN_DECLS |
| 430 | long quotactl __P ((unsigned int, const char *, int, caddr_t)); |
| 431 | __END_DECLS |
| 432 | |
| 433 | #endif /* __KERNEL__ */ |
| 434 | #endif /* _QUOTA_ */ |