Merge quota update from Jan Kara

9 files changed, 683 insertions, 124 deletions

diff --git a/include/linux/dqblk_v1.h b/include/linux/dqblk_v1.h
new file mode 100644
index 000000000000..42fbf4797156
--- /dev/null
+++ b/include/linux/dqblk_v1.h
@@ -0,0 +1,18 @@
+/*
+ *	File with in-memory structures of old quota format
+ */
+
+#ifndef _LINUX_DQBLK_V1_H
+#define _LINUX_DQBLK_V1_H
+
+/* Id of quota format */
+#define QFMT_VFS_OLD 1
+
+/* Root squash turned on */
+#define V1_DQF_RSQUASH 1
+
+/* Special information about quotafile */
+struct v1_mem_dqinfo {
+};
+
+#endif	/* _LINUX_DQBLK_V1_H */
diff --git a/include/linux/dqblk_v2.h b/include/linux/dqblk_v2.h
new file mode 100644
index 000000000000..4a6c5f6867bb
--- /dev/null
+++ b/include/linux/dqblk_v2.h
@@ -0,0 +1,20 @@
+/*
+ *	Definitions of structures for vfsv0 quota format
+ */
+
+#ifndef _LINUX_DQBLK_V2_H
+#define _LINUX_DQBLK_V2_H
+
+#include <linux/types.h>
+
+/* id numbers of quota format */
+#define QFMT_VFS_V0 2
+
+/* Inmemory copy of version specific information */
+struct v2_mem_dqinfo {
+	unsigned int dqi_blocks;
+	unsigned int dqi_free_blk;
+	unsigned int dqi_free_entry;
+};
+
+#endif /* _LINUX_DQBLK_V2_H */
diff --git a/include/linux/fs.h b/include/linux/fs.h
index bb2e243a1713..df5c5fdb0c6f 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -368,6 +368,7 @@ struct inode {
 	unsigned long		i_blksize;
 	unsigned long		i_blocks;
 	unsigned long		i_version;
+	unsigned short          i_bytes;
 	struct semaphore	i_sem;
 	struct inode_operations	*i_op;
 	struct file_operations	*i_fop;	/* former ->i_op->default_file_ops */
@@ -425,6 +426,39 @@ struct fown_struct {
 	int signum;		/* posix.1b rt signal to be delivered on IO */
 };
 
+static inline void inode_add_bytes(struct inode *inode, loff_t bytes)
+{
+	inode->i_blocks += bytes >> 9;
+	bytes &= 511;
+	inode->i_bytes += bytes;
+	if (inode->i_bytes >= 512) {
+		inode->i_blocks++;
+		inode->i_bytes -= 512;
+	}
+}
+
+static inline void inode_sub_bytes(struct inode *inode, loff_t bytes)
+{
+	inode->i_blocks -= bytes >> 9;
+	bytes &= 511;
+	if (inode->i_bytes < bytes) {
+		inode->i_blocks--;
+		inode->i_bytes += 512;
+	}
+	inode->i_bytes -= bytes;
+}
+
+static inline loff_t inode_get_bytes(struct inode *inode)
+{
+	return (((loff_t)inode->i_blocks) << 9) + inode->i_bytes;
+}
+
+static inline void inode_set_bytes(struct inode *inode, loff_t bytes)
+{
+	inode->i_blocks = bytes >> 9;
+	inode->i_bytes = bytes & 511;
+}
+
 /*
  * Track a single file's readahead state
  */
@@ -581,20 +615,6 @@ struct nameidata {
 	struct vfsmount *old_mnt;
 };
 
-#define DQUOT_USR_ENABLED	0x01		/* User diskquotas enabled */
-#define DQUOT_GRP_ENABLED	0x02		/* Group diskquotas enabled */
-
-struct quota_mount_options
-{
-	unsigned int flags;			/* Flags for diskquotas on this device */
-	struct semaphore dqio_sem;		/* lock device while I/O in progress */
-	struct semaphore dqoff_sem;		/* serialize quota_off() and quota_on() on device */
-	struct file *files[MAXQUOTAS];		/* fp's to quotafiles */
-	time_t inode_expire[MAXQUOTAS];		/* expiretime for inode-quota */
-	time_t block_expire[MAXQUOTAS];		/* expiretime for block-quota */
-	char rsquash[MAXQUOTAS];		/* for quotas threat root as any other user */
-};
-
 /*
  *	Umount options
  */
@@ -624,6 +644,7 @@ struct super_block {
 	struct file_system_type	*s_type;
 	struct super_operations	*s_op;
 	struct dquot_operations	*dq_op;
+ 	struct quotactl_ops	*s_qcop;
 	struct export_operations *s_export_op;
 	unsigned long		s_flags;
 	unsigned long		s_magic;
@@ -642,7 +663,7 @@ struct super_block {
 
 	struct block_device	*s_bdev;
 	struct list_head	s_instances;
-	struct quota_mount_options s_dquot;	/* Diskquota specific options */
+	struct quota_info	s_dquot;	/* Diskquota specific options */
 
 	char s_id[32];				/* Informational name */
 
@@ -809,16 +830,6 @@ static inline void mark_inode_dirty_sync(struct inode *inode)
 	__mark_inode_dirty(inode, I_DIRTY_SYNC);
 }
 
-struct dquot_operations {
-	void (*initialize) (struct inode *, short);
-	void (*drop) (struct inode *);
-	int (*alloc_block) (struct inode *, unsigned long, char);
-	int (*alloc_inode) (const struct inode *, unsigned long);
-	void (*free_block) (struct inode *, unsigned long);
-	void (*free_inode) (const struct inode *, unsigned long);
-	int (*transfer) (struct inode *, struct iattr *);
-};
-
 
 /**
  * &export_operations - for nfsd to communicate with file systems
diff --git a/include/linux/quota.h b/include/linux/quota.h
index b2d5de7368f6..0a36a5e59caf 100644
--- a/include/linux/quota.h
+++ b/include/linux/quota.h
@@ -40,30 +40,22 @@
 #define _LINUX_QUOTA_
 
 #include <linux/errno.h>
+#include <linux/types.h>
 
-/*
- * Convert diskblocks to blocks and the other way around.
- */
-#define dbtob(num) (num << BLOCK_SIZE_BITS)
-#define btodb(num) (num >> BLOCK_SIZE_BITS)
+#define __DQUOT_VERSION__	"dquot_6.5.1"
+#define __DQUOT_NUM_VERSION__	6*10000+5*100+1
 
-/*
- * Convert count of filesystem blocks to diskquota blocks, meant
- * for filesystems where i_blksize != BLOCK_SIZE
- */
-#define fs_to_dq_blocks(num, blksize) (((num) * (blksize)) / BLOCK_SIZE)
+typedef __kernel_uid32_t qid_t; /* Type in which we store ids in memory */
+typedef __u64 qsize_t;          /* Type in which we store sizes */
 
-/*
- * Definitions for disk quotas imposed on the average user
- * (big brother finally hits Linux).
- *
- * The following constants define the amount of time given a user
- * before the soft limits are treated as hard limits (usually resulting
- * in an allocation failure). The timer is started when the user crosses
- * their soft limit, it is reset when they go below their soft limit.
- */
-#define MAX_IQ_TIME  604800	/* (7*24*60*60) 1 week */
-#define MAX_DQ_TIME  604800	/* (7*24*60*60) 1 week */
+/* 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 */
@@ -78,9 +70,6 @@
 	"undefined", \
 };
 
-#define QUOTAFILENAME "quota"
-#define QUOTAGROUP "staff"
-
 /*
  * Command definitions for the 'quotactl' system call.
  * The commands are broken into a main command defined below
@@ -91,45 +80,111 @@
 #define SUBCMDSHIFT 8
 #define QCMD(cmd, type)  (((cmd) << SUBCMDSHIFT) | ((type) & SUBCMDMASK))
 
-#define Q_QUOTAON  0x0100	/* enable quotas */
-#define Q_QUOTAOFF 0x0200	/* disable quotas */
-#define Q_GETQUOTA 0x0300	/* get limits and usage */
-#define Q_SETQUOTA 0x0400	/* set limits and usage */
-#define Q_SETUSE   0x0500	/* set usage */
-#define Q_SYNC     0x0600	/* sync disk copy of a filesystems quotas */
-#define Q_SETQLIM  0x0700	/* set limits */
-#define Q_GETSTATS 0x0800	/* get collected stats */
-#define Q_RSQUASH  0x1000	/* set root_squash option */
+#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;
+};
 
 /*
- * The following structure defines the format of the disk quota file
- * (as it appears on disk) - the file is an array of these structures
- * indexed by user or group number.
+ * Structure used for setting quota information about file via quotactl
+ * Following flags are used to specify which fields are valid
  */
-struct dqblk {
+#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/xqm.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 */
-	__u32 dqb_curblocks;	/* current block count */
+	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 */
+	time_t dqb_btime;	/* time limit for excessive disk use */
+	time_t dqb_itime;	/* time limit for excessive inode use */
 };
 
 /*
- * Shorthand notation.
+ * Data for one quotafile kept in memory
  */
-#define	dq_bhardlimit	dq_dqb.dqb_bhardlimit
-#define	dq_bsoftlimit	dq_dqb.dqb_bsoftlimit
-#define	dq_curblocks	dq_dqb.dqb_curblocks
-#define	dq_ihardlimit	dq_dqb.dqb_ihardlimit
-#define	dq_isoftlimit	dq_dqb.dqb_isoftlimit
-#define	dq_curinodes	dq_dqb.dqb_curinodes
-#define	dq_btime	dq_dqb.dqb_btime
-#define	dq_itime	dq_dqb.dqb_itime
+struct quota_format_type;
+
+struct mem_dqinfo {
+	struct quota_format_type *dqi_format;
+	int 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 0x10000  /* Is info dirty? */
+#define DQF_ANY_DQUOT_DIRTY 0x20000	/* Is any dquot dirty? */
+
+extern inline void mark_info_dirty(struct mem_dqinfo *info)
+{
+	info->dqi_flags |= DQF_INFO_DIRTY;
+}
 
-#define dqoff(UID)      ((loff_t)((UID) * sizeof (struct dqblk)))
+#define info_dirty(info) ((info)->dqi_flags & DQF_INFO_DIRTY)
+
+#define info_any_dirty(info) ((info)->dqi_flags & DQF_INFO_DIRTY ||\
+			      (info)->dqi_flags & DQF_ANY_DQUOT_DIRTY)
+
+#define sb_dqopt(sb) (&(sb)->s_dquot)
+
+extern int nr_dquots, nr_free_dquots;
 
 struct dqstats {
 	__u32 lookups;
@@ -142,9 +197,7 @@ struct dqstats {
 	__u32 syncs;
 };
 
-#ifdef __KERNEL__
-
-extern int dquot_root_squash;
+extern struct dqstats dqstats;
 
 #define NR_DQHASH 43            /* Just an arbitrary number */
 
@@ -161,36 +214,112 @@ struct dquot {
 	struct list_head dq_free;	/* Free list element */
 	wait_queue_head_t dq_wait_lock;	/* Pointer to waitqueue on dquot lock */
 	wait_queue_head_t dq_wait_free;	/* Pointer to waitqueue for quota to be unused */
-	int dq_count;			/* Reference count */
+	int dq_count;			/* Use count */
+	int dq_dup_ref;			/* Number of duplicated refences */
 
 	/* 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 */
 	short dq_type;			/* Type of quota */
 	short dq_flags;			/* See DQ_* */
 	unsigned long dq_referenced;	/* Number of times this dquot was 
 					   referenced during its lifetime */
-	struct dqblk dq_dqb;		/* Diskquota usage */
+	struct mem_dqblk dq_dqb;	/* Diskquota usage */
 };
 
 #define NODQUOT (struct dquot *)NULL
 
-/*
- * Flags used for set_dqblk.
- */
-#define SET_QUOTA         0x02
-#define SET_USE           0x04
-#define SET_QLIMIT        0x08
-
 #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 semaphore dqoff_sem;		/* serialize quota_off() and quota_on() on device */
+	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 {\
+	dquot->dq_flags |= DQ_MOD;\
+	sb_dqopt(dquot->dq_sb)->info[dquot->dq_type].dqi_flags |= DQF_ANY_DQUOT_DIRTY;\
+} while (0)
+
+#define dquot_dirty(dquot) ((dquot)->dq_flags & DQ_MOD)
+
+static inline int is_enabled(struct quota_info *dqopt, int type)
+{
+	switch (type) {
+		case USRQUOTA:
+			return dqopt->flags & DQUOT_USR_ENABLED;
+		case GRPQUOTA:
+			return dqopt->flags & DQUOT_GRP_ENABLED;
+	}
+	return 0;
+}
+
+#define sb_any_quota_enabled(sb) (is_enabled(sb_dqopt(sb), USRQUOTA) | is_enabled(sb_dqopt(sb), GRPQUOTA))
+
+#define sb_has_quota_enabled(sb, type) (is_enabled(sb_dqopt(sb), type))
+
+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 ((int, const char *, int, caddr_t));
+long quotactl __P ((unsigned int, const char *, int, caddr_t));
 __END_DECLS
 
 #endif /* __KERNEL__ */
diff --git a/include/linux/quotacompat.h b/include/linux/quotacompat.h
new file mode 100644
index 000000000000..484aac17efc9
--- /dev/null
+++ b/include/linux/quotacompat.h
@@ -0,0 +1,86 @@
+/*
+ *	Definition of symbols used for backward compatible interface
+ */
+
+#ifndef _LINUX_QUOTACOMPAT_
+#define _LINUX_QUOTACOMPAT_
+
+#include <linux/types.h>
+#include <linux/quota.h>
+
+struct v1c_mem_dqblk {
+	__u32 dqb_bhardlimit;	/* absolute limit on disk blks alloc */
+	__u32 dqb_bsoftlimit;	/* preferred limit on disk blks */
+	__u32 dqb_curblocks;	/* current block count */
+	__u32 dqb_ihardlimit;	/* maximum # 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 files */
+};
+
+struct v1c_dqstats {
+	__u32 lookups;
+	__u32 drops;
+	__u32 reads;
+	__u32 writes;
+	__u32 cache_hits;
+	__u32 allocated_dquots;
+	__u32 free_dquots;
+	__u32 syncs;
+};
+
+struct v2c_mem_dqblk {
+	unsigned int dqb_ihardlimit;
+	unsigned int dqb_isoftlimit;
+	unsigned int dqb_curinodes;
+	unsigned int dqb_bhardlimit;
+	unsigned int dqb_bsoftlimit;
+	qsize_t dqb_curspace;
+	__kernel_time_t dqb_btime;
+	__kernel_time_t dqb_itime;
+};
+
+struct v2c_mem_dqinfo {
+	unsigned int dqi_bgrace;
+	unsigned int dqi_igrace;
+	unsigned int dqi_flags;
+	unsigned int dqi_blocks;
+	unsigned int dqi_free_blk;
+	unsigned int dqi_free_entry;
+};
+
+struct v2c_dqstats {
+	__u32 lookups;
+	__u32 drops;
+	__u32 reads;
+	__u32 writes;
+	__u32 cache_hits;
+	__u32 allocated_dquots;
+	__u32 free_dquots;
+	__u32 syncs;
+	__u32 version;
+};
+
+#define Q_COMP_QUOTAON  0x0100	/* enable quotas */
+#define Q_COMP_QUOTAOFF 0x0200	/* disable quotas */
+#define Q_COMP_SYNC     0x0600	/* sync disk copy of a filesystems quotas */
+
+#define Q_V1_GETQUOTA 0x0300	/* get limits and usage */
+#define Q_V1_SETQUOTA 0x0400	/* set limits and usage */
+#define Q_V1_SETUSE   0x0500	/* set usage */
+#define Q_V1_SETQLIM  0x0700	/* set limits */
+#define Q_V1_GETSTATS 0x0800	/* get collected stats */
+#define Q_V1_RSQUASH  0x1000	/* set root_squash option */
+
+#define Q_V2_SETQLIM  0x0700	/* set limits */
+#define Q_V2_GETINFO  0x0900	/* get info about quotas - graces, flags... */
+#define Q_V2_SETINFO  0x0A00	/* set info about quotas */
+#define Q_V2_SETGRACE 0x0B00	/* set inode and block grace */
+#define Q_V2_SETFLAGS 0x0C00	/* set flags for quota */
+#define Q_V2_GETQUOTA 0x0D00	/* get limits and usage */
+#define Q_V2_SETQUOTA 0x0E00	/* set limits and usage */
+#define Q_V2_SETUSE   0x0F00	/* set usage */
+#define Q_V2_GETSTATS 0x1100	/* get collected stats */
+
+#endif
diff --git a/include/linux/quotaio_v1.h b/include/linux/quotaio_v1.h
new file mode 100644
index 000000000000..746654b5de70
--- /dev/null
+++ b/include/linux/quotaio_v1.h
@@ -0,0 +1,33 @@
+#ifndef _LINUX_QUOTAIO_V1_H
+#define _LINUX_QUOTAIO_V1_H
+
+#include <linux/types.h>
+
+/*
+ * The following constants define the amount of time given a user
+ * before the soft limits are treated as hard limits (usually resulting
+ * in an allocation failure). The timer is started when the user crosses
+ * their soft limit, it is reset when they go below their soft limit.
+ */
+#define MAX_IQ_TIME  604800	/* (7*24*60*60) 1 week */
+#define MAX_DQ_TIME  604800	/* (7*24*60*60) 1 week */
+
+/*
+ * The following structure defines the format of the disk quota file
+ * (as it appears on disk) - the file is an array of these structures
+ * indexed by user or group number.
+ */
+struct v1_disk_dqblk {
+	__u32 dqb_bhardlimit;	/* absolute limit on disk blks alloc */
+	__u32 dqb_bsoftlimit;	/* preferred limit on disk blks */
+	__u32 dqb_curblocks;	/* current block count */
+	__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 */
+};
+
+#define v1_dqoff(UID)      ((loff_t)((UID) * sizeof (struct v1_disk_dqblk)))
+
+#endif	/* _LINUX_QUOTAIO_V1_H */
diff --git a/include/linux/quotaio_v2.h b/include/linux/quotaio_v2.h
new file mode 100644
index 000000000000..da4e02730bc8
--- /dev/null
+++ b/include/linux/quotaio_v2.h
@@ -0,0 +1,79 @@
+/*
+ *	Definitions of structures for vfsv0 quota format
+ */
+
+#ifndef _LINUX_QUOTAIO_V2_H
+#define _LINUX_QUOTAIO_V2_H
+
+#include <linux/types.h>
+#include <linux/quota.h>
+
+/*
+ * Definitions of magics and versions of current quota files
+ */
+#define V2_INITQMAGICS {\
+	0xd9c01f11,	/* USRQUOTA */\
+	0xd9c01927	/* GRPQUOTA */\
+}
+
+#define V2_INITQVERSIONS {\
+	0,		/* USRQUOTA */\
+	0		/* GRPQUOTA */\
+}
+
+/*
+ * The following structure defines the format of the disk quota file
+ * (as it appears on disk) - the file is a radix tree whose leaves point
+ * to blocks of these structures.
+ */
+struct v2_disk_dqblk {
+	__u32 dqb_id;		/* id this quota applies to */
+	__u32 dqb_ihardlimit;	/* absolute limit on allocated inodes */
+	__u32 dqb_isoftlimit;	/* preferred inode limit */
+	__u32 dqb_curinodes;	/* current # allocated inodes */
+	__u32 dqb_bhardlimit;	/* absolute limit on disk space (in QUOTABLOCK_SIZE) */
+	__u32 dqb_bsoftlimit;	/* preferred limit on disk space (in QUOTABLOCK_SIZE) */
+	__u64 dqb_curspace;	/* current space occupied (in bytes) */
+	__u64 dqb_btime;	/* time limit for excessive disk use */
+	__u64 dqb_itime;	/* time limit for excessive inode use */
+};
+
+/*
+ * Here are header structures as written on disk and their in-memory copies
+ */
+/* First generic header */
+struct v2_disk_dqheader {
+	__u32 dqh_magic;	/* Magic number identifying file */
+	__u32 dqh_version;	/* File version */
+};
+
+/* Header with type and version specific information */
+struct v2_disk_dqinfo {
+	__u32 dqi_bgrace;	/* Time before block soft limit becomes hard limit */
+	__u32 dqi_igrace;	/* Time before inode soft limit becomes hard limit */
+	__u32 dqi_flags;	/* Flags for quotafile (DQF_*) */
+	__u32 dqi_blocks;	/* Number of blocks in file */
+	__u32 dqi_free_blk;	/* Number of first free block in the list */
+	__u32 dqi_free_entry;	/* Number of block with at least one free entry */
+};
+
+/*
+ *  Structure of header of block with quota structures. It is padded to 16 bytes so
+ *  there will be space for exactly 18 quota-entries in a block
+ */
+struct v2_disk_dqdbheader {
+	__u32 dqdh_next_free;	/* Number of next block with free entry */
+	__u32 dqdh_prev_free;	/* Number of previous block with free entry */
+	__u16 dqdh_entries;	/* Number of valid entries in block */
+	__u16 dqdh_pad1;
+	__u32 dqdh_pad2;
+};
+
+#define V2_DQINFOOFF	sizeof(struct v2_disk_dqheader)	/* Offset of info header in file */
+#define V2_DQBLKSIZE_BITS	10
+#define V2_DQBLKSIZE	(1 << V2_DQBLKSIZE_BITS)	/* Size of block with quota structures */
+#define V2_DQTREEOFF	1		/* Offset of tree in file in blocks */
+#define V2_DQTREEDEPTH	4		/* Depth of quota tree */
+#define V2_DQSTRINBLK	((V2_DQBLKSIZE - sizeof(struct v2_disk_dqdbheader)) / sizeof(struct v2_disk_dqblk))	/* Number of entries in one blocks */
+
+#endif /* _LINUX_QUOTAIO_V2_H */
diff --git a/include/linux/quotaops.h b/include/linux/quotaops.h
index 0a1df9e1fe56..31b24e37c159 100644
--- a/include/linux/quotaops.h
+++ b/include/linux/quotaops.h
@@ -20,15 +20,15 @@
 /*
  * declaration of quota_function calls in kernel.
  */
-extern void dquot_initialize(struct inode *inode, short type);
+extern void sync_dquots(struct super_block *sb, int type);
+
+extern void dquot_initialize(struct inode *inode, int type);
 extern void dquot_drop(struct inode *inode);
-extern int  quota_off(struct super_block *sb, short type);
-extern int  sync_dquots(struct super_block *sb, short type);
 
-extern int  dquot_alloc_block(struct inode *inode, unsigned long number, char prealloc);
+extern int  dquot_alloc_space(struct inode *inode, qsize_t number, int prealloc);
 extern int  dquot_alloc_inode(const struct inode *inode, unsigned long number);
 
-extern void dquot_free_block(struct inode *inode, unsigned long number);
+extern void dquot_free_space(struct inode *inode, qsize_t number);
 extern void dquot_free_inode(const struct inode *inode, unsigned long number);
 
 extern int  dquot_transfer(struct inode *inode, struct iattr *iattr);
@@ -36,7 +36,11 @@ extern int  dquot_transfer(struct inode *inode, struct iattr *iattr);
 /*
  * Operations supported for diskquotas.
  */
-#define sb_any_quota_enabled(sb) ((sb)->s_dquot.flags & (DQUOT_USR_ENABLED | DQUOT_GRP_ENABLED))
+extern struct dquot_operations dquot_operations;
+extern struct quotactl_ops vfs_quotactl_ops;
+
+#define sb_dquot_ops (&dquot_operations)
+#define sb_quotactl_ops (&vfs_quotactl_ops)
 
 static __inline__ void DQUOT_INIT(struct inode *inode)
 {
@@ -59,50 +63,50 @@ static __inline__ void DQUOT_DROP(struct inode *inode)
 	unlock_kernel();
 }
 
-static __inline__ int DQUOT_PREALLOC_BLOCK_NODIRTY(struct inode *inode, int nr)
+static __inline__ int DQUOT_PREALLOC_SPACE_NODIRTY(struct inode *inode, qsize_t nr)
 {
 	lock_kernel();
 	if (sb_any_quota_enabled(inode->i_sb)) {
-		/* Number of used blocks is updated in alloc_block() */
-		if (inode->i_sb->dq_op->alloc_block(inode, fs_to_dq_blocks(nr, inode->i_sb->s_blocksize), 1) == NO_QUOTA) {
+		/* Used space is updated in alloc_space() */
+		if (inode->i_sb->dq_op->alloc_space(inode, nr, 1) == NO_QUOTA) {
 			unlock_kernel();
 			return 1;
 		}
 	}
 	else
-		inode->i_blocks += nr << (inode->i_sb->s_blocksize_bits - 9);
+		inode_add_bytes(inode, nr);
 	unlock_kernel();
 	return 0;
 }
 
-static __inline__ int DQUOT_PREALLOC_BLOCK(struct inode *inode, int nr)
+static __inline__ int DQUOT_PREALLOC_SPACE(struct inode *inode, qsize_t nr)
 {
 	int ret;
-        if (!(ret =  DQUOT_PREALLOC_BLOCK_NODIRTY(inode, nr)))
+        if (!(ret =  DQUOT_PREALLOC_SPACE_NODIRTY(inode, nr)))
 		mark_inode_dirty(inode);
 	return ret;
 }
 
-static __inline__ int DQUOT_ALLOC_BLOCK_NODIRTY(struct inode *inode, int nr)
+static __inline__ int DQUOT_ALLOC_SPACE_NODIRTY(struct inode *inode, qsize_t nr)
 {
 	lock_kernel();
 	if (sb_any_quota_enabled(inode->i_sb)) {
-		/* Number of used blocks is updated in alloc_block() */
-		if (inode->i_sb->dq_op->alloc_block(inode, fs_to_dq_blocks(nr, inode->i_sb->s_blocksize), 0) == NO_QUOTA) {
+		/* Used space is updated in alloc_space() */
+		if (inode->i_sb->dq_op->alloc_space(inode, nr, 0) == NO_QUOTA) {
 			unlock_kernel();
 			return 1;
 		}
 	}
 	else
-		inode->i_blocks += nr << (inode->i_sb->s_blocksize_bits - 9);
+		inode_add_bytes(inode, nr);
 	unlock_kernel();
 	return 0;
 }
 
-static __inline__ int DQUOT_ALLOC_BLOCK(struct inode *inode, int nr)
+static __inline__ int DQUOT_ALLOC_SPACE(struct inode *inode, qsize_t nr)
 {
 	int ret;
-	if (!(ret = DQUOT_ALLOC_BLOCK_NODIRTY(inode, nr)))
+	if (!(ret = DQUOT_ALLOC_SPACE_NODIRTY(inode, nr)))
 		mark_inode_dirty(inode);
 	return ret;
 }
@@ -121,19 +125,19 @@ static __inline__ int DQUOT_ALLOC_INODE(struct inode *inode)
 	return 0;
 }
 
-static __inline__ void DQUOT_FREE_BLOCK_NODIRTY(struct inode *inode, int nr)
+static __inline__ void DQUOT_FREE_SPACE_NODIRTY(struct inode *inode, qsize_t nr)
 {
 	lock_kernel();
 	if (sb_any_quota_enabled(inode->i_sb))
-		inode->i_sb->dq_op->free_block(inode, fs_to_dq_blocks(nr, inode->i_sb->s_blocksize));
+		inode->i_sb->dq_op->free_space(inode, nr);
 	else
-		inode->i_blocks -= nr << (inode->i_sb->s_blocksize_bits - 9);
+		inode_sub_bytes(inode, nr);
 	unlock_kernel();
 }
 
-static __inline__ void DQUOT_FREE_BLOCK(struct inode *inode, int nr)
+static __inline__ void DQUOT_FREE_SPACE(struct inode *inode, qsize_t nr)
 {
-	DQUOT_FREE_BLOCK_NODIRTY(inode, nr);
+	DQUOT_FREE_SPACE_NODIRTY(inode, nr);
 	mark_inode_dirty(inode);
 }
 
@@ -160,13 +164,25 @@ static __inline__ int DQUOT_TRANSFER(struct inode *inode, struct iattr *iattr)
 }
 
 #define DQUOT_SYNC(sb)	sync_dquots(sb, -1)
-#define DQUOT_OFF(sb)	quota_off(sb, -1)
+
+static __inline__ int DQUOT_OFF(struct super_block *sb)
+{
+	int ret = -ENOSYS;
+
+	lock_kernel();
+	if (sb->s_qcop && sb->s_qcop->quota_off)
+		ret = sb->s_qcop->quota_off(sb, -1);
+	unlock_kernel();
+	return ret;
+}
 
 #else
 
 /*
  * NO-OP when quota not configured.
  */
+#define sb_dquot_ops				(NULL)
+#define sb_quotactl_ops				(NULL)
 #define DQUOT_INIT(inode)			do { } while(0)
 #define DQUOT_DROP(inode)			do { } while(0)
 #define DQUOT_ALLOC_INODE(inode)		(0)
@@ -174,48 +190,56 @@ static __inline__ int DQUOT_TRANSFER(struct inode *inode, struct iattr *iattr)
 #define DQUOT_SYNC(sb)				do { } while(0)
 #define DQUOT_OFF(sb)				do { } while(0)
 #define DQUOT_TRANSFER(inode, iattr)		(0)
-extern __inline__ int DQUOT_PREALLOC_BLOCK_NODIRTY(struct inode *inode, int nr)
+extern __inline__ int DQUOT_PREALLOC_SPACE_NODIRTY(struct inode *inode, qsize_t nr)
 {
 	lock_kernel();
-	inode->i_blocks += nr << (inode->i_sb->s_blocksize_bits - 9);
+	inode_add_bytes(inode, nr);
 	unlock_kernel();
 	return 0;
 }
 
-extern __inline__ int DQUOT_PREALLOC_BLOCK(struct inode *inode, int nr)
+extern __inline__ int DQUOT_PREALLOC_SPACE(struct inode *inode, qsize_t nr)
 {
-	DQUOT_PREALLOC_BLOCK_NODIRTY(inode, nr);
+	DQUOT_PREALLOC_SPACE_NODIRTY(inode, nr);
 	mark_inode_dirty(inode);
 	return 0;
 }
 
-extern __inline__ int DQUOT_ALLOC_BLOCK_NODIRTY(struct inode *inode, int nr)
+extern __inline__ int DQUOT_ALLOC_SPACE_NODIRTY(struct inode *inode, qsize_t nr)
 {
 	lock_kernel();
-	inode->i_blocks += nr << (inode->i_sb->s_blocksize_bits - 9);
+	inode_add_bytes(inode, nr);
 	unlock_kernel();
 	return 0;
 }
 
-extern __inline__ int DQUOT_ALLOC_BLOCK(struct inode *inode, int nr)
+extern __inline__ int DQUOT_ALLOC_SPACE(struct inode *inode, qsize_t nr)
 {
-	DQUOT_ALLOC_BLOCK_NODIRTY(inode, nr);
+	DQUOT_ALLOC_SPACE_NODIRTY(inode, nr);
 	mark_inode_dirty(inode);
 	return 0;
 }
 
-extern __inline__ void DQUOT_FREE_BLOCK_NODIRTY(struct inode *inode, int nr)
+extern __inline__ void DQUOT_FREE_SPACE_NODIRTY(struct inode *inode, qsize_t nr)
 {
 	lock_kernel();
-	inode->i_blocks -= nr << (inode->i_sb->s_blocksize_bits - 9);
+	inode_sub_bytes(inode, nr);
 	unlock_kernel();
 }
 
-extern __inline__ void DQUOT_FREE_BLOCK(struct inode *inode, int nr)
+extern __inline__ void DQUOT_FREE_SPACE(struct inode *inode, qsize_t nr)
 {
-	DQUOT_FREE_BLOCK_NODIRTY(inode, nr);
+	DQUOT_FREE_SPACE_NODIRTY(inode, nr);
 	mark_inode_dirty(inode);
 }	
 
 #endif /* CONFIG_QUOTA */
+
+#define DQUOT_PREALLOC_BLOCK_NODIRTY(inode, nr)	DQUOT_PREALLOC_SPACE_NODIRTY(inode, ((qsize_t)(nr)) << (inode)->i_sb->s_blocksize_bits)
+#define DQUOT_PREALLOC_BLOCK(inode, nr)	DQUOT_PREALLOC_SPACE(inode, ((qsize_t)(nr)) << (inode)->i_sb->s_blocksize_bits)
+#define DQUOT_ALLOC_BLOCK_NODIRTY(inode, nr) DQUOT_ALLOC_SPACE_NODIRTY(inode, ((qsize_t)(nr)) << (inode)->i_sb->s_blocksize_bits)
+#define DQUOT_ALLOC_BLOCK(inode, nr) DQUOT_ALLOC_SPACE(inode, ((qsize_t)(nr)) << (inode)->i_sb->s_blocksize_bits)
+#define DQUOT_FREE_BLOCK_NODIRTY(inode, nr) DQUOT_FREE_SPACE_NODIRTY(inode, ((qsize_t)(nr)) << (inode)->i_sb->s_blocksize_bits)
+#define DQUOT_FREE_BLOCK(inode, nr) DQUOT_FREE_SPACE(inode, ((qsize_t)(nr)) << (inode)->i_sb->s_blocksize_bits)
+
 #endif /* _LINUX_QUOTAOPS_ */
diff --git a/include/linux/xqm.h b/include/linux/xqm.h
new file mode 100644
index 000000000000..d077bc18a424
--- /dev/null
+++ b/include/linux/xqm.h
@@ -0,0 +1,159 @@
+/*
+ * Copyright (c) 1995-2001 Silicon Graphics, Inc.  All Rights Reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of version 2.1 of the GNU Lesser General Public License
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it would be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * Further, this software is distributed without any warranty that it is
+ * free of the rightful claim of any third person regarding infringement
+ * or the like.  Any license provided herein, whether implied or
+ * otherwise, applies only to this software file.  Patent licenses, if
+ * any, provided herein do not apply to combinations of this program with
+ * other software, or any other product whatsoever.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this program; if not, write the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston MA 02111-1307,
+ * USA.
+ *
+ * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
+ * Mountain View, CA  94043, or:
+ *
+ * http://www.sgi.com
+ *
+ * For further information regarding this notice, see:
+ *
+ * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
+ */
+#ifndef _LINUX_XQM_H
+#define _LINUX_XQM_H
+
+#include <linux/types.h>
+
+/*
+ * Disk quota - quotactl(2) commands for the XFS Quota Manager (XQM).
+ */
+
+#define XQM_CMD(x)	(('X'<<8)+(x))	/* note: forms first QCMD argument */
+#define Q_XQUOTAON	XQM_CMD(0x1)	/* enable accounting/enforcement */
+#define Q_XQUOTAOFF	XQM_CMD(0x2)	/* disable accounting/enforcement */
+#define Q_XGETQUOTA	XQM_CMD(0x3)	/* get disk limits and usage */
+#define Q_XSETQLIM	XQM_CMD(0x4)	/* set disk limits */
+#define Q_XGETQSTAT	XQM_CMD(0x5)	/* get quota subsystem status */
+#define Q_XQUOTARM	XQM_CMD(0x6)	/* free disk space used by dquots */
+
+/*
+ * fs_disk_quota structure:
+ *
+ * This contains the current quota information regarding a user/proj/group.
+ * It is 64-bit aligned, and all the blk units are in BBs (Basic Blocks) of
+ * 512 bytes.
+ */
+#define FS_DQUOT_VERSION	1	/* fs_disk_quota.d_version */
+typedef struct fs_disk_quota {
+	__s8		d_version;	/* version of this structure */
+	__s8		d_flags;	/* XFS_{USER,PROJ,GROUP}_QUOTA */
+	__u16		d_fieldmask;	/* field specifier */
+	__u32		d_id;		/* user, project, or group ID */
+	__u64		d_blk_hardlimit;/* absolute limit on disk blks */
+	__u64		d_blk_softlimit;/* preferred limit on disk blks */
+	__u64		d_ino_hardlimit;/* maximum # allocated inodes */
+	__u64		d_ino_softlimit;/* preferred inode limit */
+	__u64		d_bcount;	/* # disk blocks owned by the user */
+	__u64		d_icount;	/* # inodes owned by the user */
+	__s32		d_itimer;	/* zero if within inode limits */
+					/* if not, we refuse service */
+	__s32		d_btimer;	/* similar to above; for disk blocks */
+	__u16	  	d_iwarns;       /* # warnings issued wrt num inodes */
+	__u16	  	d_bwarns;       /* # warnings issued wrt disk blocks */
+	__s32		d_padding2;	/* padding2 - for future use */
+	__u64		d_rtb_hardlimit;/* absolute limit on realtime blks */
+	__u64		d_rtb_softlimit;/* preferred limit on RT disk blks */
+	__u64		d_rtbcount;	/* # realtime blocks owned */
+	__s32		d_rtbtimer;	/* similar to above; for RT disk blks */
+	__u16	  	d_rtbwarns;     /* # warnings issued wrt RT disk blks */
+	__s16		d_padding3;	/* padding3 - for future use */	
+	char		d_padding4[8];	/* yet more padding */
+} fs_disk_quota_t;
+
+/*
+ * These fields are sent to Q_XSETQLIM to specify fields that need to change.
+ */
+#define FS_DQ_ISOFT	(1<<0)
+#define FS_DQ_IHARD	(1<<1)
+#define FS_DQ_BSOFT	(1<<2)
+#define FS_DQ_BHARD 	(1<<3)
+#define FS_DQ_RTBSOFT	(1<<4)
+#define FS_DQ_RTBHARD	(1<<5)
+#define FS_DQ_LIMIT_MASK	(FS_DQ_ISOFT | FS_DQ_IHARD | FS_DQ_BSOFT | \
+				 FS_DQ_BHARD | FS_DQ_RTBSOFT | FS_DQ_RTBHARD)
+/*
+ * These timers can only be set in super user's dquot. For others, timers are
+ * automatically started and stopped. Superusers timer values set the limits
+ * for the rest.  In case these values are zero, the DQ_{F,B}TIMELIMIT values
+ * defined below are used. 
+ * These values also apply only to the d_fieldmask field for Q_XSETQLIM.
+ */
+#define FS_DQ_BTIMER	(1<<6)
+#define FS_DQ_ITIMER	(1<<7)
+#define FS_DQ_RTBTIMER 	(1<<8)
+#define FS_DQ_TIMER_MASK	(FS_DQ_BTIMER | FS_DQ_ITIMER | FS_DQ_RTBTIMER)
+
+/*
+ * The following constants define the default amount of time given a user
+ * before the soft limits are treated as hard limits (usually resulting
+ * in an allocation failure).  These may be modified by the quotactl(2)
+ * system call with the Q_XSETQLIM command.
+ */
+#define	DQ_FTIMELIMIT	(7 * 24*60*60)		/* 1 week */
+#define	DQ_BTIMELIMIT	(7 * 24*60*60)		/* 1 week */
+
+/*
+ * Various flags related to quotactl(2).  Only relevant to XFS filesystems.
+ */
+#define XFS_QUOTA_UDQ_ACCT	(1<<0)  /* user quota accounting */
+#define XFS_QUOTA_UDQ_ENFD	(1<<1)  /* user quota limits enforcement */
+#define XFS_QUOTA_GDQ_ACCT	(1<<2)  /* group quota accounting */
+#define XFS_QUOTA_GDQ_ENFD	(1<<3)  /* group quota limits enforcement */
+
+#define XFS_USER_QUOTA		(1<<0)	/* user quota type */
+#define XFS_PROJ_QUOTA		(1<<1)	/* (IRIX) project quota type */
+#define XFS_GROUP_QUOTA		(1<<2)	/* group quota type */
+
+/*
+ * fs_quota_stat is the struct returned in Q_XGETQSTAT for a given file system.
+ * Provides a centralized way to get meta infomation about the quota subsystem.
+ * eg. space taken up for user and group quotas, number of dquots currently
+ * incore.
+ */
+#define FS_QSTAT_VERSION	1	/* fs_quota_stat.qs_version */
+
+/*
+ * Some basic infomation about 'quota files'.
+ */
+typedef struct fs_qfilestat {
+	__u64		qfs_ino;	/* inode number */
+	__u64		qfs_nblks;	/* number of BBs 512-byte-blks */
+	__u32		qfs_nextents;	/* number of extents */
+} fs_qfilestat_t;
+
+typedef struct fs_quota_stat {
+	__s8		qs_version;	/* version number for future changes */
+	__u16		qs_flags;	/* XFS_QUOTA_{U,P,G}DQ_{ACCT,ENFD} */
+	__s8		qs_pad;		/* unused */
+	fs_qfilestat_t	qs_uquota;	/* user quota storage information */
+	fs_qfilestat_t	qs_gquota;	/* group quota storage information */
+	__u32		qs_incoredqs;	/* number of dquots incore */
+	__s32		qs_btimelimit;  /* limit for blks timer */	
+	__s32		qs_itimelimit;  /* limit for inodes timer */	
+	__s32		qs_rtbtimelimit;/* limit for rt blks timer */	
+	__u16		qs_bwarnlimit;	/* limit for num warnings */
+	__u16		qs_iwarnlimit;	/* limit for num warnings */
+} fs_quota_stat_t;
+
+#endif	/* _LINUX_XQM_H */