| /* |
| * Copyright (c) 1982, 1986 Regents of the University of California. |
| * All rights reserved. |
| * |
| * This code is derived from software contributed to Berkeley by |
| * Robert Elz at The University of Melbourne. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * 1. Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * 2. Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in the |
| * documentation and/or other materials provided with the distribution. |
| * 3. Neither the name of the University nor the names of its contributors |
| * may be used to endorse or promote products derived from this software |
| * without specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| * |
| * Version: $Id: quota.h,v 2.0 1996/11/17 16:48:14 mvw Exp mvw $ |
| */ |
| |
| #ifndef _LINUX_QUOTA_ |
| #define _LINUX_QUOTA_ |
| |
| #include <linux/errno.h> |
| #include <linux/types.h> |
| #include <linux/spinlock.h> |
| |
| #define __DQUOT_VERSION__ "dquot_6.5.1" |
| #define __DQUOT_NUM_VERSION__ 6*10000+5*100+1 |
| |
| typedef __kernel_uid32_t qid_t; /* Type in which we store ids in memory */ |
| typedef __u64 qsize_t; /* Type in which we store sizes */ |
| |
| extern spinlock_t dq_list_lock; |
| extern spinlock_t dq_data_lock; |
| |
| /* Size of blocks in which are counted size limits */ |
| #define QUOTABLOCK_BITS 10 |
| #define QUOTABLOCK_SIZE (1 << QUOTABLOCK_BITS) |
| |
| /* Conversion routines from and to quota blocks */ |
| #define qb2kb(x) ((x) << (QUOTABLOCK_BITS-10)) |
| #define kb2qb(x) ((x) >> (QUOTABLOCK_BITS-10)) |
| #define toqb(x) (((x) + QUOTABLOCK_SIZE - 1) >> QUOTABLOCK_BITS) |
| |
| #define MAXQUOTAS 2 |
| #define USRQUOTA 0 /* element used for user quotas */ |
| #define GRPQUOTA 1 /* element used for group quotas */ |
| |
| /* |
| * Definitions for the default names of the quotas files. |
| */ |
| #define INITQFNAMES { \ |
| "user", /* USRQUOTA */ \ |
| "group", /* GRPQUOTA */ \ |
| "undefined", \ |
| }; |
| |
| /* |
| * Command definitions for the 'quotactl' system call. |
| * The commands are broken into a main command defined below |
| * and a subcommand that is used to convey the type of |
| * quota that is being manipulated (see above). |
| */ |
| #define SUBCMDMASK 0x00ff |
| #define SUBCMDSHIFT 8 |
| #define QCMD(cmd, type) (((cmd) << SUBCMDSHIFT) | ((type) & SUBCMDMASK)) |
| |
| #define Q_SYNC 0x800001 /* sync disk copy of a filesystems quotas */ |
| #define Q_QUOTAON 0x800002 /* turn quotas on */ |
| #define Q_QUOTAOFF 0x800003 /* turn quotas off */ |
| #define Q_GETFMT 0x800004 /* get quota format used on given filesystem */ |
| #define Q_GETINFO 0x800005 /* get information about quota files */ |
| #define Q_SETINFO 0x800006 /* set information about quota files */ |
| #define Q_GETQUOTA 0x800007 /* get user quota structure */ |
| #define Q_SETQUOTA 0x800008 /* set user quota structure */ |
| |
| /* |
| * Quota structure used for communication with userspace via quotactl |
| * Following flags are used to specify which fields are valid |
| */ |
| #define QIF_BLIMITS 1 |
| #define QIF_SPACE 2 |
| #define QIF_ILIMITS 4 |
| #define QIF_INODES 8 |
| #define QIF_BTIME 16 |
| #define QIF_ITIME 32 |
| #define QIF_LIMITS (QIF_BLIMITS | QIF_ILIMITS) |
| #define QIF_USAGE (QIF_SPACE | QIF_INODES) |
| #define QIF_TIMES (QIF_BTIME | QIF_ITIME) |
| #define QIF_ALL (QIF_LIMITS | QIF_USAGE | QIF_TIMES) |
| |
| struct if_dqblk { |
| __u64 dqb_bhardlimit; |
| __u64 dqb_bsoftlimit; |
| __u64 dqb_curspace; |
| __u64 dqb_ihardlimit; |
| __u64 dqb_isoftlimit; |
| __u64 dqb_curinodes; |
| __u64 dqb_btime; |
| __u64 dqb_itime; |
| __u32 dqb_valid; |
| }; |
| |
| /* |
| * Structure used for setting quota information about file via quotactl |
| * Following flags are used to specify which fields are valid |
| */ |
| #define IIF_BGRACE 1 |
| #define IIF_IGRACE 2 |
| #define IIF_FLAGS 4 |
| #define IIF_ALL (IIF_BGRACE | IIF_IGRACE | IIF_FLAGS) |
| |
| struct if_dqinfo { |
| __u64 dqi_bgrace; |
| __u64 dqi_igrace; |
| __u32 dqi_flags; |
| __u32 dqi_valid; |
| }; |
| |
| #ifdef __KERNEL__ |
| |
| #include <linux/dqblk_xfs.h> |
| #include <linux/dqblk_v1.h> |
| #include <linux/dqblk_v2.h> |
| |
| /* |
| * Data for one user/group kept in memory |
| */ |
| struct mem_dqblk { |
| __u32 dqb_bhardlimit; /* absolute limit on disk blks alloc */ |
| __u32 dqb_bsoftlimit; /* preferred limit on disk blks */ |
| qsize_t dqb_curspace; /* current used space */ |
| __u32 dqb_ihardlimit; /* absolute limit on allocated inodes */ |
| __u32 dqb_isoftlimit; /* preferred inode limit */ |
| __u32 dqb_curinodes; /* current # allocated inodes */ |
| time_t dqb_btime; /* time limit for excessive disk use */ |
| time_t dqb_itime; /* time limit for excessive inode use */ |
| }; |
| |
| /* |
| * Data for one quotafile kept in memory |
| */ |
| struct quota_format_type; |
| |
| struct mem_dqinfo { |
| struct quota_format_type *dqi_format; |
| unsigned long dqi_flags; |
| unsigned int dqi_bgrace; |
| unsigned int dqi_igrace; |
| union { |
| struct v1_mem_dqinfo v1_i; |
| struct v2_mem_dqinfo v2_i; |
| } u; |
| }; |
| |
| #define DQF_MASK 0xffff /* Mask for format specific flags */ |
| #define DQF_INFO_DIRTY_B 16 |
| #define DQF_ANY_DQUOT_DIRTY_B 17 |
| #define DQF_INFO_DIRTY (1 << DQF_INFO_DIRTY_B) /* Is info dirty? */ |
| #define DQF_ANY_DQUOT_DIRTY (1 << DQF_ANY_DQUOT_DIRTY B) /* Is any dquot dirty? */ |
| |
| extern inline void mark_info_dirty(struct mem_dqinfo *info) |
| { |
| set_bit(DQF_INFO_DIRTY_B, &info->dqi_flags); |
| } |
| |
| #define info_dirty(info) test_bit(DQF_INFO_DIRTY_B, &(info)->dqi_flags) |
| #define info_any_dquot_dirty(info) test_bit(DQF_ANY_DQUOT_DIRTY_B, &(info)->dqi_flags) |
| #define info_any_dirty(info) (info_dirty(info) || info_any_dquot_dirty(info)) |
| |
| #define sb_dqopt(sb) (&(sb)->s_dquot) |
| |
| struct dqstats { |
| int lookups; |
| int drops; |
| int reads; |
| int writes; |
| int cache_hits; |
| int allocated_dquots; |
| int free_dquots; |
| int syncs; |
| }; |
| |
| extern struct dqstats dqstats; |
| |
| #define NR_DQHASH 43 /* Just an arbitrary number */ |
| |
| #define DQ_MOD_B 0 |
| #define DQ_BLKS_B 1 |
| #define DQ_INODES_B 2 |
| #define DQ_FAKE_B 3 |
| |
| #define DQ_MOD (1 << DQ_MOD_B) /* dquot modified since read */ |
| #define DQ_BLKS (1 << DQ_BLKS_B) /* uid/gid has been warned about blk limit */ |
| #define DQ_INODES (1 << DQ_INODES_B) /* uid/gid has been warned about inode limit */ |
| #define DQ_FAKE (1 << DQ_FAKE_B) /* no limits only usage */ |
| |
| struct dquot { |
| struct list_head dq_hash; /* Hash list in memory */ |
| struct list_head dq_inuse; /* List of all quotas */ |
| struct list_head dq_free; /* Free list element */ |
| struct semaphore dq_lock; /* dquot IO lock */ |
| atomic_t dq_count; /* Use count */ |
| |
| /* fields after this point are cleared when invalidating */ |
| struct super_block *dq_sb; /* superblock this applies to */ |
| unsigned int dq_id; /* ID this applies to (uid, gid) */ |
| loff_t dq_off; /* Offset of dquot on disk */ |
| unsigned long dq_flags; /* See DQ_* */ |
| short dq_type; /* Type of quota */ |
| struct mem_dqblk dq_dqb; /* Diskquota usage */ |
| }; |
| |
| #define NODQUOT (struct dquot *)NULL |
| |
| #define QUOTA_OK 0 |
| #define NO_QUOTA 1 |
| |
| /* Operations which must be implemented by each quota format */ |
| struct quota_format_ops { |
| int (*check_quota_file)(struct super_block *sb, int type); /* Detect whether file is in our format */ |
| int (*read_file_info)(struct super_block *sb, int type); /* Read main info about file - called on quotaon() */ |
| int (*write_file_info)(struct super_block *sb, int type); /* Write main info about file */ |
| int (*free_file_info)(struct super_block *sb, int type); /* Called on quotaoff() */ |
| int (*read_dqblk)(struct dquot *dquot); /* Read structure for one user */ |
| int (*commit_dqblk)(struct dquot *dquot); /* Write (or delete) structure for one user */ |
| }; |
| |
| /* Operations working with dquots */ |
| struct dquot_operations { |
| void (*initialize) (struct inode *, int); |
| void (*drop) (struct inode *); |
| int (*alloc_space) (struct inode *, qsize_t, int); |
| int (*alloc_inode) (const struct inode *, unsigned long); |
| void (*free_space) (struct inode *, qsize_t); |
| void (*free_inode) (const struct inode *, unsigned long); |
| int (*transfer) (struct inode *, struct iattr *); |
| }; |
| |
| /* Operations handling requests from userspace */ |
| struct quotactl_ops { |
| int (*quota_on)(struct super_block *, int, int, char *); |
| int (*quota_off)(struct super_block *, int); |
| int (*quota_sync)(struct super_block *, int); |
| int (*get_info)(struct super_block *, int, struct if_dqinfo *); |
| int (*set_info)(struct super_block *, int, struct if_dqinfo *); |
| int (*get_dqblk)(struct super_block *, int, qid_t, struct if_dqblk *); |
| int (*set_dqblk)(struct super_block *, int, qid_t, struct if_dqblk *); |
| int (*get_xstate)(struct super_block *, struct fs_quota_stat *); |
| int (*set_xstate)(struct super_block *, unsigned int, int); |
| int (*get_xquota)(struct super_block *, int, qid_t, struct fs_disk_quota *); |
| int (*set_xquota)(struct super_block *, int, qid_t, struct fs_disk_quota *); |
| }; |
| |
| struct quota_format_type { |
| int qf_fmt_id; /* Quota format id */ |
| struct quota_format_ops *qf_ops; /* Operations of format */ |
| struct module *qf_owner; /* Module implementing quota format */ |
| struct quota_format_type *qf_next; |
| }; |
| |
| #define DQUOT_USR_ENABLED 0x01 /* User diskquotas enabled */ |
| #define DQUOT_GRP_ENABLED 0x02 /* Group diskquotas enabled */ |
| |
| struct quota_info { |
| unsigned int flags; /* Flags for diskquotas on this device */ |
| struct semaphore dqio_sem; /* lock device while I/O in progress */ |
| struct rw_semaphore dqoff_sem; /* serialize quota_off() and quota_on() on device and ops using quota_info struct, pointers from inode to dquots */ |
| struct file *files[MAXQUOTAS]; /* fp's to quotafiles */ |
| struct mem_dqinfo info[MAXQUOTAS]; /* Information for each quota type */ |
| struct quota_format_ops *ops[MAXQUOTAS]; /* Operations for each type */ |
| }; |
| |
| /* Inline would be better but we need to dereference super_block which is not defined yet */ |
| #define mark_dquot_dirty(dquot) do {\ |
| set_bit(DQF_ANY_DQUOT_DIRTY_B, &(sb_dqopt((dquot)->dq_sb)->info[(dquot)->dq_type].dqi_flags));\ |
| set_bit(DQ_MOD_B, &(dquot)->dq_flags);\ |
| } while (0) |
| |
| #define dquot_dirty(dquot) test_bit(DQ_MOD_B, &(dquot)->dq_flags) |
| |
| #define sb_has_quota_enabled(sb, type) ((type)==USRQUOTA ? \ |
| (sb_dqopt(sb)->flags & DQUOT_USR_ENABLED) : (sb_dqopt(sb)->flags & DQUOT_GRP_ENABLED)) |
| |
| #define sb_any_quota_enabled(sb) (sb_has_quota_enabled(sb, USRQUOTA) | \ |
| sb_has_quota_enabled(sb, GRPQUOTA)) |
| |
| int register_quota_format(struct quota_format_type *fmt); |
| void unregister_quota_format(struct quota_format_type *fmt); |
| |
| #else |
| |
| # /* nodep */ include <sys/cdefs.h> |
| |
| __BEGIN_DECLS |
| long quotactl __P ((unsigned int, const char *, int, caddr_t)); |
| __END_DECLS |
| |
| #endif /* __KERNEL__ */ |
| #endif /* _QUOTA_ */ |