Merge quota update from Jan Kara

arch/ia64/ia32/sys_ia32.c

@@ -3669,7 +3669,11 @@ getname32 (const char *filename)
 	return result;
 }
 
-struct dqblk32 {
+extern asmlinkage long sys_quotactl(int cmd, const char *special, int id, caddr_t addr);
+
+#ifdef CONFIG_QIFACE_COMPAT
+#ifdef CONFIG_QIFACE_V1
+struct user_dqblk32 {
 	__u32 dqb_bhardlimit;
 	__u32 dqb_bsoftlimit;
 	__u32 dqb_curblocks;
@@ -3679,49 +3683,82 @@ struct dqblk32 {
 	__kernel_time_t32 dqb_btime;
 	__kernel_time_t32 dqb_itime;
 };
+typedef struct v1c_mem_dqblk comp_dqblk_t;
 
-asmlinkage long
-sys32_quotactl (int cmd, unsigned int special, int id, struct dqblk32 *addr)
+#define Q_COMP_GETQUOTA Q_V1_GETQUOTA
+#define Q_COMP_SETQUOTA Q_V1_SETQUOTA
+#define Q_COMP_SETQLIM Q_V1_SETQLIM
+#define Q_COMP_SETUSE Q_V1_SETUSE
+#else
+struct user_dqblk32 {
+	__u32 dqb_ihardlimit;
+	__u32 dqb_isoftlimit;
+	__u32 dqb_curinodes;
+	__u32 dqb_bhardlimit;
+	__u32 dqb_bsoftlimit;
+	__u64 dqb_curspace;
+	__kernel_time_t32 dqb_btime;
+	__kernel_time_t32 dqb_itime;
+};
+typedef struct v2c_mem_dqblk comp_dqblk_t;
+
+#define Q_COMP_GETQUOTA Q_V2_GETQUOTA
+#define Q_COMP_SETQUOTA Q_V2_SETQUOTA
+#define Q_COMP_SETQLIM Q_V2_SETQLIM
+#define Q_COMP_SETUSE Q_V2_SETUSE
+#endif
+
+asmlinkage long sys32_quotactl(int cmd, const char *special, int id, caddr_t addr)
 {
-	extern asmlinkage long sys_quotactl (int, const char *, int, caddr_t);
 	int cmds = cmd >> SUBCMDSHIFT;
+	long err;
+	comp_dqblk_t d;
 	mm_segment_t old_fs;
-	struct dqblk d;
 	char *spec;
-	long err;
 	
 	switch (cmds) {
-	      case Q_GETQUOTA:
+		case Q_COMP_GETQUOTA:
 			break;
-	      case Q_SETQUOTA:
-	      case Q_SETUSE:
-	      case Q_SETQLIM:
-		if (copy_from_user (&d, addr, sizeof(struct dqblk32)))
+		case Q_COMP_SETQUOTA:
+		case Q_COMP_SETUSE:
+		case Q_COMP_SETQLIM:
+			if (copy_from_user(&d, (struct user_dqblk32 *)addr,
+					    sizeof (struct user_dqblk32)))
 				return -EFAULT;
-		d.dqb_itime = ((struct dqblk32 *)&d)->dqb_itime;
-		d.dqb_btime = ((struct dqblk32 *)&d)->dqb_btime;
+			d.dqb_itime = ((struct user_dqblk32 *)&d)->dqb_itime;
+			d.dqb_btime = ((struct user_dqblk32 *)&d)->dqb_btime;
 			break;
 	default:
-		return sys_quotactl(cmd, (void *) A(special), id, (caddr_t) addr);
+		return sys_quotactl(cmd, special, id, (__kernel_caddr_t)addr);
 	}
-	spec = getname32((void *) A(special));
+	spec = getname (special);
 	err = PTR_ERR(spec);
-	if (IS_ERR(spec))
+	if (IS_ERR(spec)) return err;
+	old_fs = get_fs();
+	set_fs (KERNEL_DS);
+	err = sys_quotactl(cmd, (const char *)spec, id, (__kernel_caddr_t)&d);
+	set_fs (old_fs);
+	putname (spec);
+	if (err)
 		return err;
-	old_fs = get_fs ();
-	set_fs(KERNEL_DS);
-	err = sys_quotactl(cmd, (const char *)spec, id, (caddr_t)&d);
-	set_fs(old_fs);
-	putname(spec);
-	if (cmds == Q_GETQUOTA) {
+	if (cmds == Q_COMP_GETQUOTA) {
 		__kernel_time_t b = d.dqb_btime, i = d.dqb_itime;
-		((struct dqblk32 *)&d)->dqb_itime = i;
-		((struct dqblk32 *)&d)->dqb_btime = b;
-		if (copy_to_user(addr, &d, sizeof(struct dqblk32)))
+		((struct user_dqblk32 *)&d)->dqb_itime = i;
+		((struct user_dqblk32 *)&d)->dqb_btime = b;
+		if (copy_to_user ((struct user_dqblk32 *)addr, &d,
+				  sizeof (struct user_dqblk32)))
 			return -EFAULT;
 	}
-	return err;
+	return 0;
+}
+
+#else
+/* No conversion needed for new interface */
+asmlinkage long sys32_quotactl(int cmd, const char *special, int id, caddr_t addr)
+{
+	return sys_quotactl(cmd, special, id, addr);
 }
+#endif
 
 asmlinkage long
 sys32_sched_rr_get_interval (pid_t pid, struct timespec32 *interval)

arch/s390x/kernel/linux32.c

@@ -897,7 +897,28 @@ asmlinkage long sys32_fcntl64(unsigned int fd, unsigned int cmd, unsigned long a
 	return sys32_fcntl(fd, cmd, arg);
 }
 
-struct mem_dqblk32 {
+extern asmlinkage int sys_quotactl(int cmd, const char *special, int id, caddr_t addr);
+
+#ifdef CONFIG_QIFACE_COMPAT
+#ifdef CONFIG_QIFACE_V1
+struct user_dqblk32 {
+	__u32 dqb_bhardlimit;
+	__u32 dqb_bsoftlimit;
+	__u32 dqb_curblocks;
+	__u32 dqb_ihardlimit;
+	__u32 dqb_isoftlimit;
+	__u32 dqb_curinodes;
+	__kernel_time_t32 dqb_btime;
+	__kernel_time_t32 dqb_itime;
+};
+typedef struct v1c_mem_dqblk comp_dqblk_t;
+
+#define Q_COMP_GETQUOTA Q_V1_GETQUOTA
+#define Q_COMP_SETQUOTA Q_V1_SETQUOTA
+#define Q_COMP_SETQLIM Q_V1_SETQLIM
+#define Q_COMP_SETUSE Q_V1_SETUSE
+#else
+struct user_dqblk32 {
 	__u32 dqb_ihardlimit;
 	__u32 dqb_isoftlimit;
 	__u32 dqb_curinodes;
@@ -907,54 +928,66 @@ struct mem_dqblk32 {
 	__kernel_time_t32 dqb_btime;
 	__kernel_time_t32 dqb_itime;
 };
+typedef struct v2c_mem_dqblk comp_dqblk_t;
 
-extern asmlinkage long sys_quotactl(int cmd, const char *special, int id, __kernel_caddr_t addr);
+#define Q_COMP_GETQUOTA Q_V2_GETQUOTA
+#define Q_COMP_SETQUOTA Q_V2_SETQUOTA
+#define Q_COMP_SETQLIM Q_V2_SETQLIM
+#define Q_COMP_SETUSE Q_V2_SETUSE
+#endif
 
-asmlinkage int sys32_quotactl(int cmd, const char *special, int id, unsigned long addr)
+asmlinkage int sys32_quotactl(int cmd, const char *special, int id, caddr_t addr)
 {
 	int cmds = cmd >> SUBCMDSHIFT;
 	int err;
-	struct mem_dqblk d;
+	comp_dqblk_t d;
 	mm_segment_t old_fs;
 	char *spec;
 	
 	switch (cmds) {
-	case Q_GETQUOTA:
+		case Q_COMP_GETQUOTA:
 			break;
-	case Q_SETQUOTA:
-	case Q_SETUSE:
-	case Q_SETQLIM:
-		if (copy_from_user (&d, (struct mem_dqblk32 *)addr,
-				    sizeof (struct mem_dqblk32)))
+		case Q_COMP_SETQUOTA:
+		case Q_COMP_SETUSE:
+		case Q_COMP_SETQLIM:
+			if (copy_from_user(&d, (struct user_dqblk32 *)addr,
+					    sizeof (struct user_dqblk32)))
 				return -EFAULT;
-		d.dqb_itime = ((struct mem_dqblk32 *)&d)->dqb_itime;
-		d.dqb_btime = ((struct mem_dqblk32 *)&d)->dqb_btime;
+			d.dqb_itime = ((struct user_dqblk32 *)&d)->dqb_itime;
+			d.dqb_btime = ((struct user_dqblk32 *)&d)->dqb_btime;
 			break;
 	default:
-		return sys_quotactl(cmd, special,
-				    id, (__kernel_caddr_t)addr);
+		return sys_quotactl(cmd, special, id, (__kernel_caddr_t)addr);
 	}
 	spec = getname (special);
 	err = PTR_ERR(spec);
 	if (IS_ERR(spec)) return err;
-	old_fs = get_fs ();
+	old_fs = get_fs();
 	set_fs (KERNEL_DS);
 	err = sys_quotactl(cmd, (const char *)spec, id, (__kernel_caddr_t)&d);
 	set_fs (old_fs);
 	putname (spec);
 	if (err)
 		return err;
-	if (cmds == Q_GETQUOTA) {
+	if (cmds == Q_COMP_GETQUOTA) {
 		__kernel_time_t b = d.dqb_btime, i = d.dqb_itime;
-		((struct mem_dqblk32 *)&d)->dqb_itime = i;
-		((struct mem_dqblk32 *)&d)->dqb_btime = b;
-		if (copy_to_user ((struct mem_dqblk32 *)addr, &d,
-				  sizeof (struct mem_dqblk32)))
+		((struct user_dqblk32 *)&d)->dqb_itime = i;
+		((struct user_dqblk32 *)&d)->dqb_btime = b;
+		if (copy_to_user ((struct user_dqblk32 *)addr, &d,
+				  sizeof (struct user_dqblk32)))
 			return -EFAULT;
 	}
 	return 0;
 }
 
+#else
+/* No conversion needed for new interface */
+asmlinkage int sys32_quotactl(int cmd, const char *special, int id, caddr_t addr)
+{
+	return sys_quotactl(cmd, special, id, addr);
+}
+#endif
+
 static inline int put_statfs (struct statfs32 *ubuf, struct statfs *kbuf)
 {
 	int err;

arch/sparc64/kernel/sys_sparc32.c

@@ -889,7 +889,11 @@ asmlinkage long sys32_fcntl64(unsigned int fd, unsigned int cmd, unsigned long a
 	return sys32_fcntl(fd, cmd, arg);
 }
 
-struct dqblk32 {
+extern asmlinkage int sys_quotactl(int cmd, const char *special, int id, caddr_t addr);
+
+#ifdef CONFIG_QIFACE_COMPAT
+#ifdef CONFIG_QIFACE_V1
+struct user_dqblk32 {
 	__u32 dqb_bhardlimit;
 	__u32 dqb_bsoftlimit;
 	__u32 dqb_curblocks;
@@ -899,52 +903,83 @@ struct dqblk32 {
 	__kernel_time_t32 dqb_btime;
 	__kernel_time_t32 dqb_itime;
 };
+typedef struct v1c_mem_dqblk comp_dqblk_t;
+
+#define Q_COMP_GETQUOTA Q_V1_GETQUOTA
+#define Q_COMP_SETQUOTA Q_V1_SETQUOTA
+#define Q_COMP_SETQLIM Q_V1_SETQLIM
+#define Q_COMP_SETUSE Q_V1_SETUSE
+#else
+struct user_dqblk32 {
+	__u32 dqb_ihardlimit;
+	__u32 dqb_isoftlimit;
+	__u32 dqb_curinodes;
+	__u32 dqb_bhardlimit;
+	__u32 dqb_bsoftlimit;
+	__u64 dqb_curspace;
+	__kernel_time_t32 dqb_btime;
+	__kernel_time_t32 dqb_itime;
+};
+typedef struct v2c_mem_dqblk comp_dqblk_t;
 
-extern asmlinkage int sys_quotactl(int cmd, const char *special, int id, caddr_t addr);
+#define Q_COMP_GETQUOTA Q_V2_GETQUOTA
+#define Q_COMP_SETQUOTA Q_V2_SETQUOTA
+#define Q_COMP_SETQLIM Q_V2_SETQLIM
+#define Q_COMP_SETUSE Q_V2_SETUSE
+#endif
 
-asmlinkage int sys32_quotactl(int cmd, const char *special, int id, unsigned long addr)
+asmlinkage int sys32_quotactl(int cmd, const char *special, int id, caddr_t addr)
 {
 	int cmds = cmd >> SUBCMDSHIFT;
 	int err;
-	struct dqblk d;
+	comp_dqblk_t d;
 	mm_segment_t old_fs;
 	char *spec;
 	
 	switch (cmds) {
-	case Q_GETQUOTA:
+		case Q_COMP_GETQUOTA:
 			break;
-	case Q_SETQUOTA:
-	case Q_SETUSE:
-	case Q_SETQLIM:
-		if (copy_from_user (&d, (struct dqblk32 *)addr,
-				    sizeof (struct dqblk32)))
+		case Q_COMP_SETQUOTA:
+		case Q_COMP_SETUSE:
+		case Q_COMP_SETQLIM:
+			if (copy_from_user(&d, (struct user_dqblk32 *)addr,
+					    sizeof (struct user_dqblk32)))
 				return -EFAULT;
-		d.dqb_itime = ((struct dqblk32 *)&d)->dqb_itime;
-		d.dqb_btime = ((struct dqblk32 *)&d)->dqb_btime;
+			d.dqb_itime = ((struct user_dqblk32 *)&d)->dqb_itime;
+			d.dqb_btime = ((struct user_dqblk32 *)&d)->dqb_btime;
 			break;
 	default:
-		return sys_quotactl(cmd, special,
-				    id, (caddr_t)addr);
+		return sys_quotactl(cmd, special, id, (__kernel_caddr_t)addr);
 	}
 	spec = getname (special);
 	err = PTR_ERR(spec);
 	if (IS_ERR(spec)) return err;
-	old_fs = get_fs ();
+	old_fs = get_fs();
 	set_fs (KERNEL_DS);
-	err = sys_quotactl(cmd, (const char *)spec, id, (caddr_t)&d);
+	err = sys_quotactl(cmd, (const char *)spec, id, (__kernel_caddr_t)&d);
 	set_fs (old_fs);
 	putname (spec);
-	if (cmds == Q_GETQUOTA) {
+	if (err)
+		return err;
+	if (cmds == Q_COMP_GETQUOTA) {
 		__kernel_time_t b = d.dqb_btime, i = d.dqb_itime;
-		((struct dqblk32 *)&d)->dqb_itime = i;
-		((struct dqblk32 *)&d)->dqb_btime = b;
-		if (copy_to_user ((struct dqblk32 *)addr, &d,
-				  sizeof (struct dqblk32)))
+		((struct user_dqblk32 *)&d)->dqb_itime = i;
+		((struct user_dqblk32 *)&d)->dqb_btime = b;
+		if (copy_to_user ((struct user_dqblk32 *)addr, &d,
+				  sizeof (struct user_dqblk32)))
 			return -EFAULT;
 	}
-	return err;
+	return 0;
 }
 
+#else
+/* No conversion needed for new interface */
+asmlinkage int sys32_quotactl(int cmd, const char *special, int id, caddr_t addr)
+{
+	return sys_quotactl(cmd, special, id, addr);
+}
+#endif
+
 static inline int put_statfs (struct statfs32 *ubuf, struct statfs *kbuf)
 {
 	int err;

arch/sparc64/kernel/systbls.S

@@ -194,7 +194,7 @@ sunos_sys_table:
 	.word sunos_getdirentries, sys32_statfs, sys32_fstatfs
 	.word sys_oldumount, sunos_nosys, sunos_nosys
 	.word sys_getdomainname, sys_setdomainname
-	.word sunos_nosys, sys32_quotactl, sunos_nosys
+	.word sunos_nosys, sys_quotactl, sunos_nosys
 	.word sunos_mount, sys_ustat, sunos_semsys
 	.word sunos_nosys, sunos_shmsys, sunos_audit
 	.word sunos_nosys, sunos_getdents, sys_setsid

fs/Config.help

 CONFIG_QUOTA
   If you say Y here, you will be able to set per user limits for disk
-  usage (also called disk quotas). Currently, it works only for the
-  ext2 file system. You need additional software in order to use quota
-  support; for details, read the Quota mini-HOWTO, available from
+  usage (also called disk quotas). Currently, it works for the
+  ext2, ext3, and reiserfs file system. You need additional software
+  in order to use quota support (you can download sources from
+  <http://www.sf.net/projects/linuxquota/>). For further details, read
+  the Quota mini-HOWTO, available from
   <http://www.linuxdoc.org/docs.html#howto>. Probably the quota
   support is only useful for multi user systems. If unsure, say N.
 
+CONFIG_QFMT_V1
+  This quota format was (is) used by kernels earlier than 2.4.??. If
+  you have quota working and you don't want to convert to new quota
+  format say Y here.
+
+CONFIG_QFMT_V2
+  This quota format allows using quotas with 32-bit UIDs/GIDs. If you
+  need this functionality say Y here. Note that you will need latest
+  quota utilities for new quota format with this kernel.
+
+CONFIG_QIFACE_COMPAT
+  This option will enable old quota interface in kernel.
+  If you have old quota tools (version <= 3.04) and you don't want to
+  upgrade them say Y here.
+
+CONFIG_QIFACE_V1
+  This is the oldest quota interface. It was used for old quota format.
+  If you have old quota tools and you use old quota format choose this
+  interface (if unsure, this interface is the best one to choose).
+
+CONFIG_QIFACE_V2
+  This quota interface was used by VFS v0 quota format. If you need
+  support for VFS v0 quota format (eg. you're using quota on ReiserFS)
+  and you don't want to upgrade quota tools, choose this interface.
+
 CONFIG_MINIX_FS
   Minix is a simple operating system used in many classes about OS's.
   The minix file system (method to organize files on a hard disk

fs/Config.in

@@ -5,6 +5,14 @@ mainmenu_option next_comment
 comment 'File systems'
 
 bool 'Quota support' CONFIG_QUOTA
+dep_tristate '  Old quota format support' CONFIG_QFMT_V1 $CONFIG_QUOTA
+dep_tristate '  VFS v0 quota format support' CONFIG_QFMT_V2 $CONFIG_QUOTA
+dep_mbool '  Compatible quota interfaces' CONFIG_QIFACE_COMPAT $CONFIG_QUOTA
+if [ "$CONFIG_QUOTA" = "y" -a "$CONFIG_QIFACE_COMPAT" = "y" ]; then
+   choice '    Compatible quota interfaces' \
+	"Original	CONFIG_QIFACE_V1 \
+	 VFSv0		CONFIG_QIFACE_V2" Original
+fi
 tristate 'Kernel automounter support' CONFIG_AUTOFS_FS
 tristate 'Kernel automounter version 4 support (also supports v3)' CONFIG_AUTOFS4_FS
 

fs/Makefile

@@ -7,7 +7,7 @@
 
 O_TARGET := fs.o
 
-export-objs :=	filesystems.o open.o dcache.o buffer.o bio.o inode.o
+export-objs :=	filesystems.o open.o dcache.o buffer.o bio.o inode.o dquot.o
 mod-subdirs :=	nls
 
 obj-y :=	open.o read_write.o devices.o file_table.o buffer.o \
@@ -15,7 +15,7 @@ obj-y :=	open.o read_write.o devices.o file_table.o buffer.o \
 		namei.o fcntl.o ioctl.o readdir.o select.o fifo.o locks.o \
 		dcache.o inode.o attr.o bad_inode.o file.o iobuf.o dnotify.o \
 		filesystems.o namespace.o seq_file.o xattr.o libfs.o \
-		fs-writeback.o
+		fs-writeback.o quota.o
 
 ifneq ($(CONFIG_NFSD),n)
 ifneq ($(CONFIG_NFSD),)
@@ -82,6 +82,8 @@ obj-y				+= binfmt_script.o
 obj-$(CONFIG_BINFMT_ELF)	+= binfmt_elf.o
 
 obj-$(CONFIG_QUOTA) += dquot.o
+obj-$(CONFIG_QFMT_V1) += quota_v1.o
+obj-$(CONFIG_QFMT_V2) += quota_v2.o
 
 # persistent filesystems
 obj-y += $(join $(subdir-y),$(subdir-y:%=/%.o))

fs/inode.c

@@ -99,6 +99,7 @@ static struct inode *alloc_inode(struct super_block *sb)
 		atomic_set(&inode->i_writecount, 0);
 		inode->i_size = 0;
 		inode->i_blocks = 0;
+		inode->i_bytes = 0;
 		inode->i_generation = 0;
 		memset(&inode->i_dquot, 0, sizeof(inode->i_dquot));
 		inode->i_pipe = NULL;
@@ -978,9 +979,9 @@ void update_atime (struct inode *inode)
 
 /* Functions back in dquot.c */
 void put_dquot_list(struct list_head *);
-int remove_inode_dquot_ref(struct inode *, short, struct list_head *);
+int remove_inode_dquot_ref(struct inode *, int, struct list_head *);
 
-void remove_dquot_ref(struct super_block *sb, short type)
+void remove_dquot_ref(struct super_block *sb, int type)
 {
 	struct inode *inode;
 	struct list_head *act_head;

fs/ioctl.c

@@ -102,6 +102,16 @@ asmlinkage long sys_ioctl(unsigned int fd, unsigned int cmd, unsigned long arg)
 				filp->f_flags &= ~FASYNC;
 			break;
 
+		case FIOQSIZE:
+			if (S_ISDIR(filp->f_dentry->d_inode->i_mode) ||
+			    S_ISREG(filp->f_dentry->d_inode->i_mode) ||
+			    S_ISLNK(filp->f_dentry->d_inode->i_mode)) {
+				loff_t res = inode_get_bytes(filp->f_dentry->d_inode);
+				error = copy_to_user((loff_t *)arg, &res, sizeof(res)) ? -EFAULT : 0;
+			}
+			else
+				error = -ENOTTY;
+			break;
 		default:
 			error = -ENOTTY;
 			if (S_ISREG(filp->f_dentry->d_inode->i_mode))

fs/quota_v1.c

+#include <linux/errno.h>
+#include <linux/fs.h>
+#include <linux/quota.h>
+#include <linux/dqblk_v1.h>
+#include <linux/quotaio_v1.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/module.h>
+
+#include <asm/uaccess.h>
+#include <asm/byteorder.h>
+
+static void v1_disk2mem_dqblk(struct mem_dqblk *m, struct v1_disk_dqblk *d)
+{
+	m->dqb_ihardlimit = d->dqb_ihardlimit;
+	m->dqb_isoftlimit = d->dqb_isoftlimit;
+	m->dqb_curinodes = d->dqb_curinodes;
+	m->dqb_bhardlimit = d->dqb_bhardlimit;
+	m->dqb_bsoftlimit = d->dqb_bsoftlimit;
+	m->dqb_curspace = d->dqb_curblocks << QUOTABLOCK_BITS;
+	m->dqb_itime = d->dqb_itime;
+	m->dqb_btime = d->dqb_btime;
+}
+
+static void v1_mem2disk_dqblk(struct v1_disk_dqblk *d, struct mem_dqblk *m)
+{
+	d->dqb_ihardlimit = m->dqb_ihardlimit;
+	d->dqb_isoftlimit = m->dqb_isoftlimit;
+	d->dqb_curinodes = m->dqb_curinodes;
+	d->dqb_bhardlimit = m->dqb_bhardlimit;
+	d->dqb_bsoftlimit = m->dqb_bsoftlimit;
+	d->dqb_curblocks = toqb(m->dqb_curspace);
+	d->dqb_itime = m->dqb_itime;
+	d->dqb_btime = m->dqb_btime;
+}
+
+static int v1_read_dqblk(struct dquot *dquot)
+{
+	int type = dquot->dq_type;
+	struct file *filp;
+	mm_segment_t fs;
+	loff_t offset;
+	struct v1_disk_dqblk dqblk;
+
+	filp = sb_dqopt(dquot->dq_sb)->files[type];
+	if (filp == (struct file *)NULL)
+		return -EINVAL;
+
+	/* Now we are sure filp is valid */
+	offset = v1_dqoff(dquot->dq_id);
+	fs = get_fs();
+	set_fs(KERNEL_DS);
+	filp->f_op->read(filp, (char *)&dqblk, sizeof(struct v1_disk_dqblk), &offset);
+	set_fs(fs);
+
+	v1_disk2mem_dqblk(&dquot->dq_dqb, &dqblk);
+	if (dquot->dq_dqb.dqb_bhardlimit == 0 && dquot->dq_dqb.dqb_bsoftlimit == 0 &&
+	    dquot->dq_dqb.dqb_ihardlimit == 0 && dquot->dq_dqb.dqb_isoftlimit == 0)
+		dquot->dq_flags |= DQ_FAKE;
+	dqstats.reads++;
+	return 0;
+}
+
+static int v1_commit_dqblk(struct dquot *dquot)
+{
+	short type = dquot->dq_type;
+	struct file *filp;
+	mm_segment_t fs;
+	loff_t offset;
+	ssize_t ret;
+	struct v1_disk_dqblk dqblk;
+
+	filp = sb_dqopt(dquot->dq_sb)->files[type];
+	offset = v1_dqoff(dquot->dq_id);
+	fs = get_fs();
+	set_fs(KERNEL_DS);
+
+	/*
+	 * Note: clear the DQ_MOD flag unconditionally,
+	 * so we don't loop forever on failure.
+	 */
+	v1_mem2disk_dqblk(&dqblk, &dquot->dq_dqb);
+	dquot->dq_flags &= ~DQ_MOD;
+	if (dquot->dq_id == 0) {
+		dqblk.dqb_btime = sb_dqopt(dquot->dq_sb)->info[type].dqi_bgrace;
+		dqblk.dqb_itime = sb_dqopt(dquot->dq_sb)->info[type].dqi_igrace;
+	}
+	ret = 0;
+	if (filp)
+		ret = filp->f_op->write(filp, (char *)&dqblk,
+					sizeof(struct v1_disk_dqblk), &offset);
+	if (ret != sizeof(struct v1_disk_dqblk)) {
+		printk(KERN_WARNING "VFS: dquota write failed on dev %s\n",
+			kdevname(dquot->dq_sb->s_dev));
+		if (ret >= 0)
+			ret = -EIO;
+		goto out;
+	}
+	ret = 0;
+
+out:
+	set_fs(fs);
+	dqstats.writes++;
+	return ret;
+}
+
+/* Magics of new quota format */
+#define V2_INITQMAGICS {\
+	0xd9c01f11,     /* USRQUOTA */\
+	0xd9c01927      /* GRPQUOTA */\
+}
+
+/* Header of new quota format */
+struct v2_disk_dqheader {
+	__u32 dqh_magic;        /* Magic number identifying file */
+	__u32 dqh_version;      /* File version */
+};
+
+static int v1_check_quota_file(struct super_block *sb, int type)
+{
+	struct file *f = sb_dqopt(sb)->files[type];
+	struct inode *inode = f->f_dentry->d_inode;
+	ulong blocks;
+	size_t off; 
+	struct v2_disk_dqheader dqhead;
+	mm_segment_t fs;
+	ssize_t size;
+	loff_t offset = 0;
+	static const uint quota_magics[] = V2_INITQMAGICS;
+
+	if (!inode->i_size)
+		return 0;
+	blocks = inode->i_size >> BLOCK_SIZE_BITS;
+	off = inode->i_size & (BLOCK_SIZE - 1);
+	if ((blocks % sizeof(struct v1_disk_dqblk) * BLOCK_SIZE + off) % sizeof(struct v1_disk_dqblk))
+		return 0;
+	/* Doublecheck whether we didn't get file with new format - with old quotactl() this could happen */
+	fs = get_fs();
+	set_fs(KERNEL_DS);
+	size = f->f_op->read(f, (char *)&dqhead, sizeof(struct v2_disk_dqheader), &offset);
+	set_fs(fs);
+	if (size != sizeof(struct v2_disk_dqheader))
+		return 1;	/* Probably not new format */
+	if (le32_to_cpu(dqhead.dqh_magic) != quota_magics[type])
+		return 1;	/* Definitely not new format */
+	printk(KERN_INFO "VFS: %s: Refusing to turn on old quota format on given file. It probably contains newer quota format.\n", kdevname(sb->s_dev));
+        return 0;		/* Seems like a new format file -> refuse it */
+}
+
+static int v1_read_file_info(struct super_block *sb, int type)
+{
+	struct quota_info *dqopt = sb_dqopt(sb);
+	mm_segment_t fs;
+	loff_t offset;
+	struct file *filp = dqopt->files[type];
+	struct v1_disk_dqblk dqblk;
+	int ret;
+
+	down(&dqopt->dqio_sem);
+	offset = v1_dqoff(0);
+	fs = get_fs();
+	set_fs(KERNEL_DS);
+	if ((ret = filp->f_op->read(filp, (char *)&dqblk, sizeof(struct v1_disk_dqblk), &offset)) != sizeof(struct v1_disk_dqblk)) {
+		if (ret >= 0)
+			ret = -EIO;
+		goto out;
+	}
+	ret = 0;
+	dqopt->info[type].dqi_igrace = dqblk.dqb_itime ? dqblk.dqb_itime : MAX_IQ_TIME;
+	dqopt->info[type].dqi_bgrace = dqblk.dqb_btime ? dqblk.dqb_btime : MAX_DQ_TIME;
+out:
+	up(&dqopt->dqio_sem);
+	set_fs(fs);
+	return ret;
+}
+
+static int v1_write_file_info(struct super_block *sb, int type)
+{
+	struct quota_info *dqopt = sb_dqopt(sb);
+	mm_segment_t fs;
+	struct file *filp = dqopt->files[type];
+	struct v1_disk_dqblk dqblk;
+	loff_t offset;
+	int ret;
+
+	down(&dqopt->dqio_sem);
+	dqopt->info[type].dqi_flags &= ~DQF_INFO_DIRTY;
+	offset = v1_dqoff(0);
+	fs = get_fs();
+	set_fs(KERNEL_DS);
+	if ((ret = filp->f_op->read(filp, (char *)&dqblk, sizeof(struct v1_disk_dqblk), &offset)) != sizeof(struct v1_disk_dqblk)) {
+		if (ret >= 0)
+			ret = -EIO;
+		goto out;
+	}
+	dqblk.dqb_itime = dqopt->info[type].dqi_igrace;
+	dqblk.dqb_btime = dqopt->info[type].dqi_bgrace;
+	offset = v1_dqoff(0);
+	ret = filp->f_op->write(filp, (char *)&dqblk, sizeof(struct v1_disk_dqblk), &offset);
+	if (ret == sizeof(struct v1_disk_dqblk))
+		ret = 0;
+	else if (ret > 0)
+		ret = -EIO;
+out:
+	up(&dqopt->dqio_sem);
+	set_fs(fs);
+	return ret;
+}
+
+static struct quota_format_ops v1_format_ops = {
+	check_quota_file:	v1_check_quota_file,
+	read_file_info:		v1_read_file_info,
+	write_file_info:	v1_write_file_info,
+	free_file_info:		NULL,
+	read_dqblk:		v1_read_dqblk,
+	commit_dqblk:		v1_commit_dqblk,
+};
+
+static struct quota_format_type v1_quota_format = {
+	qf_fmt_id:	QFMT_VFS_OLD,
+	qf_ops:		&v1_format_ops,
+	qf_owner:	THIS_MODULE
+};
+
+static int __init init_v1_quota_format(void)
+{
+        return register_quota_format(&v1_quota_format);
+}
+
+static void __exit exit_v1_quota_format(void)
+{
+        unregister_quota_format(&v1_quota_format);
+}
+
+EXPORT_NO_SYMBOLS;
+
+module_init(init_v1_quota_format);
+module_exit(exit_v1_quota_format);
+

fs/super.c

@@ -27,6 +27,7 @@
 #include <linux/devfs_fs_kernel.h>
 #include <linux/acct.h>
 #include <linux/blkdev.h>
+#include <linux/quotaops.h>
 #include <asm/uaccess.h>
 
 void get_filesystem(struct file_system_type *fs);
@@ -62,6 +63,8 @@ static struct super_block *alloc_super(void)
 		sema_init(&s->s_dquot.dqio_sem, 1);
 		sema_init(&s->s_dquot.dqoff_sem, 1);
 		s->s_maxbytes = MAX_NON_LFS;
+		s->dq_op = sb_dquot_ops;
+		s->s_qcop = sb_quotactl_ops;
 	}
 	return s;
 }

include/asm-alpha/ioctls.h

@@ -9,6 +9,7 @@
 #define FIONBIO		_IOW('f', 126, int)
 #define FIONREAD	_IOR('f', 127, int)
 #define TIOCINQ		FIONREAD
+#define FIOQSIZE	_IOR('f', 128, loff_t)
 
 #define TIOCGETP	_IOR('t', 8, struct sgttyb)
 #define TIOCSETP	_IOW('t', 9, struct sgttyb)

include/asm-cris/ioctls.h

@@ -69,6 +69,7 @@
 #define TIOCGICOUNT	0x545D	/* read serial port inline interrupt counts */
 #define TIOCGHAYESESP   0x545E  /* Get Hayes ESP configuration */
 #define TIOCSHAYESESP   0x545F  /* Set Hayes ESP configuration */
+#define FIOQSIZE	0x5460
 
 /* Used for packet mode */
 #define TIOCPKT_DATA		 0

include/asm-i386/ioctls.h

@@ -67,6 +67,7 @@
 #define TIOCGICOUNT	0x545D	/* read serial port inline interrupt counts */
 #define TIOCGHAYESESP   0x545E  /* Get Hayes ESP configuration */
 #define TIOCSHAYESESP   0x545F  /* Set Hayes ESP configuration */
+#define FIOQSIZE	0x5460
 
 /* Used for packet mode */
 #define TIOCPKT_DATA		 0

include/asm-ia64/ioctls.h

@@ -72,6 +72,7 @@
 #define TIOCGICOUNT	0x545D	/* read serial port inline interrupt counts */
 #define TIOCGHAYESESP   0x545E  /* Get Hayes ESP configuration */
 #define TIOCSHAYESESP   0x545F  /* Set Hayes ESP configuration */
+#define FIOQSIZE	0x5460
 
 /* Used for packet mode */
 #define TIOCPKT_DATA		 0

include/asm-m68k/ioctls.h

@@ -65,6 +65,7 @@
 
 #define TIOCMIWAIT	0x545C	/* wait for a change on serial input line(s) */
 #define TIOCGICOUNT	0x545D	/* read serial port inline interrupt counts */
+#define FIOQSIZE	0x545E
 
 /* Used for packet mode */
 #define TIOCPKT_DATA		 0

include/asm-parisc/ioctls.h

@@ -67,6 +67,7 @@
 #define TIOCGICOUNT	0x545D	/* read serial port inline interrupt counts */
 #define TIOCGHAYESESP   0x545E  /* Get Hayes ESP configuration */
 #define TIOCSHAYESESP   0x545F  /* Set Hayes ESP configuration */
+#define FIOQSIZE	0x5460	/* Get exact space used by quota */
 
 /* Used for packet mode */
 #define TIOCPKT_DATA		 0

include/asm-sh/ioctls.h

@@ -9,6 +9,7 @@
 #define FIONBIO		_IOW('f', 126, int)
 #define FIONREAD	_IOR('f', 127, int)
 #define TIOCINQ		FIONREAD
+#define FIOQSIZE	_IOR('f', 128, loff_t)
 
 #define TCGETS		0x5401
 #define TCSETS		0x5402

include/asm-sparc/ioctls.h

@@ -86,6 +86,7 @@
 #define FIONBIO		_IOW('f', 126, int)
 #define FIONREAD	_IOR('f', 127, int)
 #define TIOCINQ		FIONREAD
+#define FIOQSIZE	_IOR('f', 128, loff_t)
 
 /* SCARY Rutgers local SunOS kernel hackery, perhaps I will support it
  * someday.  This is completely bogus, I know...

include/asm-sparc64/ioctls.h

@@ -87,6 +87,7 @@
 #define FIONBIO		_IOW('f', 126, int)
 #define FIONREAD	_IOR('f', 127, int)
 #define TIOCINQ		FIONREAD
+#define FIOQSIZE	_IOR('f', 128, loff_t)
 
 /* SCARY Rutgers local SunOS kernel hackery, perhaps I will support it
  * someday.  This is completely bogus, I know...

include/linux/dqblk_v1.h

+/*
+ *	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 */

include/linux/dqblk_v2.h

+/*
+ *	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 */

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

include/linux/quotacompat.h

+/*
+ *	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

include/linux/quotaio_v1.h

+#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 */

include/linux/quotaio_v2.h

+/*
+ *	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 */

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_ */

include/linux/xqm.h

+/*
+ * 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 */