--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/include/linux/quota.h Sun Jan 11 20:20:11 2009 +0100
@@ -0,0 +1,362 @@
+/*
+ * 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.
+ */
+
+#ifndef _LINUX_QUOTA_
+#define _LINUX_QUOTA_
+
+#include <linux/errno.h>
+#include <linux/types.h>
+
+#define __DQUOT_VERSION__ "dquot_6.5.1"
+#define __DQUOT_NUM_VERSION__ 6*10000+5*100+1
+
+/* 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;
+};
+
+/*
+ * Definitions for quota netlink interface
+ */
+#define QUOTA_NL_NOWARN 0
+#define QUOTA_NL_IHARDWARN 1 /* Inode hardlimit reached */
+#define QUOTA_NL_ISOFTLONGWARN 2 /* Inode grace time expired */
+#define QUOTA_NL_ISOFTWARN 3 /* Inode softlimit reached */
+#define QUOTA_NL_BHARDWARN 4 /* Block hardlimit reached */
+#define QUOTA_NL_BSOFTLONGWARN 5 /* Block grace time expired */
+#define QUOTA_NL_BSOFTWARN 6 /* Block softlimit reached */
+#define QUOTA_NL_IHARDBELOW 7 /* Usage got below inode hardlimit */
+#define QUOTA_NL_ISOFTBELOW 8 /* Usage got below inode softlimit */
+#define QUOTA_NL_BHARDBELOW 9 /* Usage got below block hardlimit */
+#define QUOTA_NL_BSOFTBELOW 10 /* Usage got below block softlimit */
+
+enum {
+ QUOTA_NL_C_UNSPEC,
+ QUOTA_NL_C_WARNING,
+ __QUOTA_NL_C_MAX,
+};
+#define QUOTA_NL_C_MAX (__QUOTA_NL_C_MAX - 1)
+
+enum {
+ QUOTA_NL_A_UNSPEC,
+ QUOTA_NL_A_QTYPE,
+ QUOTA_NL_A_EXCESS_ID,
+ QUOTA_NL_A_WARNING,
+ QUOTA_NL_A_DEV_MAJOR,
+ QUOTA_NL_A_DEV_MINOR,
+ QUOTA_NL_A_CAUSED_ID,
+ __QUOTA_NL_A_MAX,
+};
+#define QUOTA_NL_A_MAX (__QUOTA_NL_A_MAX - 1)
+
+
+#ifdef __KERNEL__
+#include <linux/list.h>
+#include <linux/mutex.h>
+#include <linux/rwsem.h>
+#include <linux/spinlock.h>
+#include <linux/wait.h>
+
+#include <linux/dqblk_xfs.h>
+#include <linux/dqblk_v1.h>
+#include <linux/dqblk_v2.h>
+
+#include <asm/atomic.h>
+
+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_data_lock;
+
+/* Maximal numbers of writes for quota operation (insert/delete/update)
+ * (over VFS all formats) */
+#define DQUOT_INIT_ALLOC max(V1_INIT_ALLOC, V2_INIT_ALLOC)
+#define DQUOT_INIT_REWRITE max(V1_INIT_REWRITE, V2_INIT_REWRITE)
+#define DQUOT_DEL_ALLOC max(V1_DEL_ALLOC, V2_DEL_ALLOC)
+#define DQUOT_DEL_REWRITE max(V1_DEL_REWRITE, V2_DEL_REWRITE)
+
+/*
+ * 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;
+ int dqi_fmt_id; /* Id of the dqi_format - used when turning
+ * quotas on after remount RW */
+ struct list_head dqi_dirty_list; /* List of dirty dquots */
+ unsigned long dqi_flags;
+ unsigned int dqi_bgrace;
+ unsigned int dqi_igrace;
+ qsize_t dqi_maxblimit;
+ qsize_t dqi_maxilimit;
+ union {
+ struct v1_mem_dqinfo v1_i;
+ struct v2_mem_dqinfo v2_i;
+ } u;
+};
+
+struct super_block;
+
+#define DQF_MASK 0xffff /* Mask for format specific flags */
+#define DQF_INFO_DIRTY_B 16
+#define DQF_INFO_DIRTY (1 << DQF_INFO_DIRTY_B) /* Is info dirty? */
+
+extern void mark_info_dirty(struct super_block *sb, int type);
+static inline int info_dirty(struct mem_dqinfo *info)
+{
+ return test_bit(DQF_INFO_DIRTY_B, &info->dqi_flags);
+}
+
+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 DQ_MOD_B 0 /* dquot modified since read */
+#define DQ_BLKS_B 1 /* uid/gid has been warned about blk limit */
+#define DQ_INODES_B 2 /* uid/gid has been warned about inode limit */
+#define DQ_FAKE_B 3 /* no limits only usage */
+#define DQ_READ_B 4 /* dquot was read into memory */
+#define DQ_ACTIVE_B 5 /* dquot is active (dquot_release not called) */
+
+struct dquot {
+ struct hlist_node dq_hash; /* Hash list in memory */
+ struct list_head dq_inuse; /* List of all quotas */
+ struct list_head dq_free; /* Free list element */
+ struct list_head dq_dirty; /* List of dirty dquots */
+ struct mutex dq_lock; /* dquot IO lock */
+ atomic_t dq_count; /* Use count */
+ wait_queue_head_t dq_wait_unused; /* Wait queue for dquot to become unused */
+ 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 structure for one user */
+ int (*release_dqblk)(struct dquot *dquot); /* Called when last reference to dquot is being dropped */
+};
+
+/* Operations working with dquots */
+struct dquot_operations {
+ int (*initialize) (struct inode *, int);
+ int (*drop) (struct inode *);
+ int (*alloc_space) (struct inode *, qsize_t, int);
+ int (*alloc_inode) (const struct inode *, unsigned long);
+ int (*free_space) (struct inode *, qsize_t);
+ int (*free_inode) (const struct inode *, unsigned long);
+ int (*transfer) (struct inode *, struct iattr *);
+ int (*write_dquot) (struct dquot *); /* Ordinary dquot write */
+ int (*acquire_dquot) (struct dquot *); /* Quota is going to be created on disk */
+ int (*release_dquot) (struct dquot *); /* Quota is going to be deleted from disk */
+ int (*mark_dirty) (struct dquot *); /* Dquot is marked dirty */
+ int (*write_info) (struct super_block *, int); /* Write of quota "superblock" */
+};
+
+/* Operations handling requests from userspace */
+struct quotactl_ops {
+ int (*quota_on)(struct super_block *, int, int, char *, int);
+ int (*quota_off)(struct super_block *, int, 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 */
+#define DQUOT_USR_SUSPENDED 0x04 /* User diskquotas are off, but
+ * we have necessary info in
+ * memory to turn them on */
+#define DQUOT_GRP_SUSPENDED 0x08 /* The same for group quotas */
+
+struct quota_info {
+ unsigned int flags; /* Flags for diskquotas on this device */
+ struct mutex dqio_mutex; /* lock device while I/O in progress */
+ struct mutex dqonoff_mutex; /* Serialize quotaon & quotaoff */
+ struct rw_semaphore dqptr_sem; /* serialize ops using quota_info struct, pointers from inode to dquots */
+ struct inode *files[MAXQUOTAS]; /* inodes of quotafiles */
+ struct mem_dqinfo info[MAXQUOTAS]; /* Information for each quota type */
+ struct quota_format_ops *ops[MAXQUOTAS]; /* Operations for each type */
+};
+
+int register_quota_format(struct quota_format_type *fmt);
+void unregister_quota_format(struct quota_format_type *fmt);
+
+struct quota_module_name {
+ int qm_fmt_id;
+ char *qm_mod_name;
+};
+
+#define INIT_QUOTA_MODULE_NAMES {\
+ {QFMT_VFS_OLD, "quota_v1"},\
+ {QFMT_VFS_V0, "quota_v2"},\
+ {0, NULL}}
+
+#else
+
+# /* nodep */ include <sys/cdefs.h>
+
+__BEGIN_DECLS
+long quotactl __P ((unsigned int, const char *, int, caddr_t));
+__END_DECLS
+
+#endif /* __KERNEL__ */
+#endif /* _QUOTA_ */