[linux.git] / fs / ufs / util.h

/*
 *  linux/fs/ufs/util.h
 *
 * Copyright (C) 1998 
 * Daniel Pirkl <[email protected]>
 * Charles University, Faculty of Mathematics and Physics
 */

#include <linux/buffer_head.h>
#include <linux/fs.h>
#include "swab.h"


/*
 * some useful macros
 */
#define in_range(b,first,len)	((b)>=(first)&&(b)<(first)+(len))

/*
 * functions used for retyping
 */
static inline struct ufs_buffer_head *UCPI_UBH(struct ufs_cg_private_info *cpi)
{
	return &cpi->c_ubh;
}
static inline struct ufs_buffer_head *USPI_UBH(struct ufs_sb_private_info *spi)
{
	return &spi->s_ubh;
}


/*
 * macros used for accessing structures
 */
static inline s32
ufs_get_fs_state(struct super_block *sb, struct ufs_super_block_first *usb1,
		 struct ufs_super_block_third *usb3)
{
	switch (UFS_SB(sb)->s_flags & UFS_ST_MASK) {
	case UFS_ST_SUNOS:
		if (fs32_to_cpu(sb, usb3->fs_postblformat) == UFS_42POSTBLFMT)
			return fs32_to_cpu(sb, usb1->fs_u0.fs_sun.fs_state);
		/* Fall Through to UFS_ST_SUN */
	case UFS_ST_SUN:
		return fs32_to_cpu(sb, usb3->fs_un2.fs_sun.fs_state);
	case UFS_ST_SUNx86:
		return fs32_to_cpu(sb, usb1->fs_u1.fs_sunx86.fs_state);
	case UFS_ST_44BSD:
	default:
		return fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_state);
	}
}

static inline void
ufs_set_fs_state(struct super_block *sb, struct ufs_super_block_first *usb1,
		 struct ufs_super_block_third *usb3, s32 value)
{
	switch (UFS_SB(sb)->s_flags & UFS_ST_MASK) {
	case UFS_ST_SUNOS:
		if (fs32_to_cpu(sb, usb3->fs_postblformat) == UFS_42POSTBLFMT) {
			usb1->fs_u0.fs_sun.fs_state = cpu_to_fs32(sb, value);
			break;
		}
		/* Fall Through to UFS_ST_SUN */
	case UFS_ST_SUN:
		usb3->fs_un2.fs_sun.fs_state = cpu_to_fs32(sb, value);
		break;
	case UFS_ST_SUNx86:
		usb1->fs_u1.fs_sunx86.fs_state = cpu_to_fs32(sb, value);
		break;
	case UFS_ST_44BSD:
		usb3->fs_un2.fs_44.fs_state = cpu_to_fs32(sb, value);
		break;
	}
}

static inline u32
ufs_get_fs_npsect(struct super_block *sb, struct ufs_super_block_first *usb1,
		  struct ufs_super_block_third *usb3)
{
	if ((UFS_SB(sb)->s_flags & UFS_ST_MASK) == UFS_ST_SUNx86)
		return fs32_to_cpu(sb, usb3->fs_un2.fs_sunx86.fs_npsect);
	else
		return fs32_to_cpu(sb, usb1->fs_u1.fs_sun.fs_npsect);
}

static inline u64
ufs_get_fs_qbmask(struct super_block *sb, struct ufs_super_block_third *usb3)
{
	__fs64 tmp;

	switch (UFS_SB(sb)->s_flags & UFS_ST_MASK) {
	case UFS_ST_SUNOS:
	case UFS_ST_SUN:
		((__fs32 *)&tmp)[0] = usb3->fs_un2.fs_sun.fs_qbmask[0];
		((__fs32 *)&tmp)[1] = usb3->fs_un2.fs_sun.fs_qbmask[1];
		break;
	case UFS_ST_SUNx86:
		((__fs32 *)&tmp)[0] = usb3->fs_un2.fs_sunx86.fs_qbmask[0];
		((__fs32 *)&tmp)[1] = usb3->fs_un2.fs_sunx86.fs_qbmask[1];
		break;
	case UFS_ST_44BSD:
		((__fs32 *)&tmp)[0] = usb3->fs_un2.fs_44.fs_qbmask[0];
		((__fs32 *)&tmp)[1] = usb3->fs_un2.fs_44.fs_qbmask[1];
		break;
	}

	return fs64_to_cpu(sb, tmp);
}

static inline u64
ufs_get_fs_qfmask(struct super_block *sb, struct ufs_super_block_third *usb3)
{
	__fs64 tmp;

	switch (UFS_SB(sb)->s_flags & UFS_ST_MASK) {
	case UFS_ST_SUNOS:
	case UFS_ST_SUN:
		((__fs32 *)&tmp)[0] = usb3->fs_un2.fs_sun.fs_qfmask[0];
		((__fs32 *)&tmp)[1] = usb3->fs_un2.fs_sun.fs_qfmask[1];
		break;
	case UFS_ST_SUNx86:
		((__fs32 *)&tmp)[0] = usb3->fs_un2.fs_sunx86.fs_qfmask[0];
		((__fs32 *)&tmp)[1] = usb3->fs_un2.fs_sunx86.fs_qfmask[1];
		break;
	case UFS_ST_44BSD:
		((__fs32 *)&tmp)[0] = usb3->fs_un2.fs_44.fs_qfmask[0];
		((__fs32 *)&tmp)[1] = usb3->fs_un2.fs_44.fs_qfmask[1];
		break;
	}

	return fs64_to_cpu(sb, tmp);
}

static inline u16
ufs_get_de_namlen(struct super_block *sb, struct ufs_dir_entry *de)
{
	if ((UFS_SB(sb)->s_flags & UFS_DE_MASK) == UFS_DE_OLD)
		return fs16_to_cpu(sb, de->d_u.d_namlen);
	else
		return de->d_u.d_44.d_namlen; /* XXX this seems wrong */
}

static inline void
ufs_set_de_namlen(struct super_block *sb, struct ufs_dir_entry *de, u16 value)
{
	if ((UFS_SB(sb)->s_flags & UFS_DE_MASK) == UFS_DE_OLD)
		de->d_u.d_namlen = cpu_to_fs16(sb, value);
	else
		de->d_u.d_44.d_namlen = value; /* XXX this seems wrong */
}

static inline void
ufs_set_de_type(struct super_block *sb, struct ufs_dir_entry *de, int mode)
{
	if ((UFS_SB(sb)->s_flags & UFS_DE_MASK) != UFS_DE_44BSD)
		return;

	/*
	 * TODO turn this into a table lookup
	 */
	switch (mode & S_IFMT) {
	case S_IFSOCK:
		de->d_u.d_44.d_type = DT_SOCK;
		break;
	case S_IFLNK:
		de->d_u.d_44.d_type = DT_LNK;
		break;
	case S_IFREG:
		de->d_u.d_44.d_type = DT_REG;
		break;
	case S_IFBLK:
		de->d_u.d_44.d_type = DT_BLK;
		break;
	case S_IFDIR:
		de->d_u.d_44.d_type = DT_DIR;
		break;
	case S_IFCHR:
		de->d_u.d_44.d_type = DT_CHR;
		break;
	case S_IFIFO:
		de->d_u.d_44.d_type = DT_FIFO;
		break;
	default:
		de->d_u.d_44.d_type = DT_UNKNOWN;
	}
}

static inline u32
ufs_get_inode_uid(struct super_block *sb, struct ufs_inode *inode)
{
	switch (UFS_SB(sb)->s_flags & UFS_UID_MASK) {
	case UFS_UID_44BSD:
		return fs32_to_cpu(sb, inode->ui_u3.ui_44.ui_uid);
	case UFS_UID_EFT:
		if (inode->ui_u1.oldids.ui_suid == 0xFFFF)
			return fs32_to_cpu(sb, inode->ui_u3.ui_sun.ui_uid);
		/* Fall through */
	default:
		return fs16_to_cpu(sb, inode->ui_u1.oldids.ui_suid);
	}
}

static inline void
ufs_set_inode_uid(struct super_block *sb, struct ufs_inode *inode, u32 value)
{
	switch (UFS_SB(sb)->s_flags & UFS_UID_MASK) {
	case UFS_UID_44BSD:
		inode->ui_u3.ui_44.ui_uid = cpu_to_fs32(sb, value);
		inode->ui_u1.oldids.ui_suid = cpu_to_fs16(sb, value);
		break;
	case UFS_UID_EFT:
		inode->ui_u3.ui_sun.ui_uid = cpu_to_fs32(sb, value);
		if (value > 0xFFFF)
			value = 0xFFFF;
		/* Fall through */
	default:
		inode->ui_u1.oldids.ui_suid = cpu_to_fs16(sb, value);
		break;
	}
}

static inline u32
ufs_get_inode_gid(struct super_block *sb, struct ufs_inode *inode)
{
	switch (UFS_SB(sb)->s_flags & UFS_UID_MASK) {
	case UFS_UID_44BSD:
		return fs32_to_cpu(sb, inode->ui_u3.ui_44.ui_gid);
	case UFS_UID_EFT:
		if (inode->ui_u1.oldids.ui_suid == 0xFFFF)
			return fs32_to_cpu(sb, inode->ui_u3.ui_sun.ui_gid);
		/* Fall through */
	default:
		return fs16_to_cpu(sb, inode->ui_u1.oldids.ui_sgid);
	}
}

static inline void
ufs_set_inode_gid(struct super_block *sb, struct ufs_inode *inode, u32 value)
{
	switch (UFS_SB(sb)->s_flags & UFS_UID_MASK) {
	case UFS_UID_44BSD:
		inode->ui_u3.ui_44.ui_gid = cpu_to_fs32(sb, value);
		inode->ui_u1.oldids.ui_sgid =  cpu_to_fs16(sb, value);
		break;
	case UFS_UID_EFT:
		inode->ui_u3.ui_sun.ui_gid = cpu_to_fs32(sb, value);
		if (value > 0xFFFF)
			value = 0xFFFF;
		/* Fall through */
	default:
		inode->ui_u1.oldids.ui_sgid =  cpu_to_fs16(sb, value);
		break;
	}
}

extern dev_t ufs_get_inode_dev(struct super_block *, struct ufs_inode_info *);
extern void ufs_set_inode_dev(struct super_block *, struct ufs_inode_info *, dev_t);
extern int ufs_prepare_chunk(struct page *page, loff_t pos, unsigned len);

/*
 * These functions manipulate ufs buffers
 */
#define ubh_bread(sb,fragment,size) _ubh_bread_(uspi,sb,fragment,size)  
extern struct ufs_buffer_head * _ubh_bread_(struct ufs_sb_private_info *, struct super_block *, u64 , u64);
extern struct ufs_buffer_head * ubh_bread_uspi(struct ufs_sb_private_info *, struct super_block *, u64, u64);
extern void ubh_brelse (struct ufs_buffer_head *);
extern void ubh_brelse_uspi (struct ufs_sb_private_info *);
extern void ubh_mark_buffer_dirty (struct ufs_buffer_head *);
extern void ubh_mark_buffer_uptodate (struct ufs_buffer_head *, int);
extern void ubh_sync_block(struct ufs_buffer_head *);
extern void ubh_bforget (struct ufs_buffer_head *);
extern int  ubh_buffer_dirty (struct ufs_buffer_head *);
#define ubh_ubhcpymem(mem,ubh,size) _ubh_ubhcpymem_(uspi,mem,ubh,size)
extern void _ubh_ubhcpymem_(struct ufs_sb_private_info *, unsigned char *, struct ufs_buffer_head *, unsigned);
#define ubh_memcpyubh(ubh,mem,size) _ubh_memcpyubh_(uspi,ubh,mem,size)
extern void _ubh_memcpyubh_(struct ufs_sb_private_info *, struct ufs_buffer_head *, unsigned char *, unsigned);

/* This functions works with cache pages*/
extern struct page *ufs_get_locked_page(struct address_space *mapping,
					pgoff_t index);
static inline void ufs_put_locked_page(struct page *page)
{
       unlock_page(page);
       put_page(page);
}


/*
 * macros and inline function to get important structures from ufs_sb_private_info
 */

static inline void *get_usb_offset(struct ufs_sb_private_info *uspi,
				   unsigned int offset)
{
	unsigned int index;
	
	index = offset >> uspi->s_fshift;
	offset &= ~uspi->s_fmask;
	return uspi->s_ubh.bh[index]->b_data + offset;
}

#define ubh_get_usb_first(uspi) \
	((struct ufs_super_block_first *)get_usb_offset((uspi), 0))

#define ubh_get_usb_second(uspi) \
	((struct ufs_super_block_second *)get_usb_offset((uspi), UFS_SECTOR_SIZE))

#define ubh_get_usb_third(uspi)	\
	((struct ufs_super_block_third *)get_usb_offset((uspi), 2*UFS_SECTOR_SIZE))


#define ubh_get_ucg(ubh) \
	((struct ufs_cylinder_group *)((ubh)->bh[0]->b_data))


/*
 * Extract byte from ufs_buffer_head
 * Extract the bits for a block from a map inside ufs_buffer_head
 */
#define ubh_get_addr8(ubh,begin) \
	((u8*)(ubh)->bh[(begin) >> uspi->s_fshift]->b_data + \
	((begin) & ~uspi->s_fmask))

#define ubh_get_addr16(ubh,begin) \
	(((__fs16*)((ubh)->bh[(begin) >> (uspi->s_fshift-1)]->b_data)) + \
	((begin) & ((uspi->fsize>>1) - 1)))

#define ubh_get_addr32(ubh,begin) \
	(((__fs32*)((ubh)->bh[(begin) >> (uspi->s_fshift-2)]->b_data)) + \
	((begin) & ((uspi->s_fsize>>2) - 1)))

#define ubh_get_addr64(ubh,begin) \
	(((__fs64*)((ubh)->bh[(begin) >> (uspi->s_fshift-3)]->b_data)) + \
	((begin) & ((uspi->s_fsize>>3) - 1)))

#define ubh_get_addr ubh_get_addr8

static inline void *ubh_get_data_ptr(struct ufs_sb_private_info *uspi,
				     struct ufs_buffer_head *ubh,
				     u64 blk)
{
	if (uspi->fs_magic == UFS2_MAGIC)
		return ubh_get_addr64(ubh, blk);
	else
		return ubh_get_addr32(ubh, blk);
}

#define ubh_blkmap(ubh,begin,bit) \
	((*ubh_get_addr(ubh, (begin) + ((bit) >> 3)) >> ((bit) & 7)) & (0xff >> (UFS_MAXFRAG - uspi->s_fpb)))

/*
 * Determine the number of available frags given a
 * percentage to hold in reserve.
 */
static inline u64
ufs_freespace(struct ufs_sb_private_info *uspi, int percentreserved)
{
	return ufs_blkstofrags(uspi->cs_total.cs_nbfree) +
		uspi->cs_total.cs_nffree -
		(uspi->s_dsize * (percentreserved) / 100);
}

/*
 * Macros to access cylinder group array structures
 */
#define ubh_cg_blktot(ucpi,cylno) \
	(*((__fs32*)ubh_get_addr(UCPI_UBH(ucpi), (ucpi)->c_btotoff + ((cylno) << 2))))

#define ubh_cg_blks(ucpi,cylno,rpos) \
	(*((__fs16*)ubh_get_addr(UCPI_UBH(ucpi), \
	(ucpi)->c_boff + (((cylno) * uspi->s_nrpos + (rpos)) << 1 ))))

/*
 * Bitmap operations
 * These functions work like classical bitmap operations.
 * The difference is that we don't have the whole bitmap
 * in one contiguous chunk of memory, but in several buffers.
 * The parameters of each function are super_block, ufs_buffer_head and
 * position of the beginning of the bitmap.
 */
#define ubh_setbit(ubh,begin,bit) \
	(*ubh_get_addr(ubh, (begin) + ((bit) >> 3)) |= (1 << ((bit) & 7)))

#define ubh_clrbit(ubh,begin,bit) \
	(*ubh_get_addr (ubh, (begin) + ((bit) >> 3)) &= ~(1 << ((bit) & 7)))

#define ubh_isset(ubh,begin,bit) \
	(*ubh_get_addr (ubh, (begin) + ((bit) >> 3)) & (1 << ((bit) & 7)))

#define ubh_isclr(ubh,begin,bit) (!ubh_isset(ubh,begin,bit))

#define ubh_find_first_zero_bit(ubh,begin,size) _ubh_find_next_zero_bit_(uspi,ubh,begin,size,0)

#define ubh_find_next_zero_bit(ubh,begin,size,offset) _ubh_find_next_zero_bit_(uspi,ubh,begin,size,offset)
static inline unsigned _ubh_find_next_zero_bit_(
	struct ufs_sb_private_info * uspi, struct ufs_buffer_head * ubh,
	unsigned begin, unsigned size, unsigned offset)
{
	unsigned base, count, pos;

	size -= offset;
	begin <<= 3;
	offset += begin;
	base = offset >> uspi->s_bpfshift;
	offset &= uspi->s_bpfmask;
	for (;;) {
		count = min_t(unsigned int, size + offset, uspi->s_bpf);
		size -= count - offset;
		pos = find_next_zero_bit_le(ubh->bh[base]->b_data, count, offset);
		if (pos < count || !size)
			break;
		base++;
		offset = 0;
	}
	return (base << uspi->s_bpfshift) + pos - begin;
} 	

static inline unsigned find_last_zero_bit (unsigned char * bitmap,
	unsigned size, unsigned offset)
{
	unsigned bit, i;
	unsigned char * mapp;
	unsigned char map;

	mapp = bitmap + (size >> 3);
	map = *mapp--;
	bit = 1 << (size & 7);
	for (i = size; i > offset; i--) {
		if ((map & bit) == 0)
			break;
		if ((i & 7) != 0) {
			bit >>= 1;
		} else {
			map = *mapp--;
			bit = 1 << 7;
		}
	}
	return i;
}

#define ubh_find_last_zero_bit(ubh,begin,size,offset) _ubh_find_last_zero_bit_(uspi,ubh,begin,size,offset)
static inline unsigned _ubh_find_last_zero_bit_(
	struct ufs_sb_private_info * uspi, struct ufs_buffer_head * ubh,
	unsigned begin, unsigned start, unsigned end)
{
	unsigned base, count, pos, size;

	size = start - end;
	begin <<= 3;
	start += begin;
	base = start >> uspi->s_bpfshift;
	start &= uspi->s_bpfmask;
	for (;;) {
		count = min_t(unsigned int,
			    size + (uspi->s_bpf - start), uspi->s_bpf)
			- (uspi->s_bpf - start);
		size -= count;
		pos = find_last_zero_bit (ubh->bh[base]->b_data,
			start, start - count);
		if (pos > start - count || !size)
			break;
		base--;
		start = uspi->s_bpf;
	}
	return (base << uspi->s_bpfshift) + pos - begin;
} 	

#define ubh_isblockclear(ubh,begin,block) (!_ubh_isblockset_(uspi,ubh,begin,block))

#define ubh_isblockset(ubh,begin,block) _ubh_isblockset_(uspi,ubh,begin,block)
static inline int _ubh_isblockset_(struct ufs_sb_private_info * uspi,
	struct ufs_buffer_head * ubh, unsigned begin, unsigned block)
{
	switch (uspi->s_fpb) {
	case 8:
	    	return (*ubh_get_addr (ubh, begin + block) == 0xff);
	case 4:
		return (*ubh_get_addr (ubh, begin + (block >> 1)) == (0x0f << ((block & 0x01) << 2)));
	case 2:
		return (*ubh_get_addr (ubh, begin + (block >> 2)) == (0x03 << ((block & 0x03) << 1)));
	case 1:
		return (*ubh_get_addr (ubh, begin + (block >> 3)) == (0x01 << (block & 0x07)));
	}
	return 0;	
}

#define ubh_clrblock(ubh,begin,block) _ubh_clrblock_(uspi,ubh,begin,block)
static inline void _ubh_clrblock_(struct ufs_sb_private_info * uspi,
	struct ufs_buffer_head * ubh, unsigned begin, unsigned block)
{
	switch (uspi->s_fpb) {
	case 8:
	    	*ubh_get_addr (ubh, begin + block) = 0x00;
	    	return; 
	case 4:
		*ubh_get_addr (ubh, begin + (block >> 1)) &= ~(0x0f << ((block & 0x01) << 2));
		return;
	case 2:
		*ubh_get_addr (ubh, begin + (block >> 2)) &= ~(0x03 << ((block & 0x03) << 1));
		return;
	case 1:
		*ubh_get_addr (ubh, begin + (block >> 3)) &= ~(0x01 << ((block & 0x07)));
		return;
	}
}

#define ubh_setblock(ubh,begin,block) _ubh_setblock_(uspi,ubh,begin,block)
static inline void _ubh_setblock_(struct ufs_sb_private_info * uspi,
	struct ufs_buffer_head * ubh, unsigned begin, unsigned block)
{
	switch (uspi->s_fpb) {
	case 8:
	    	*ubh_get_addr(ubh, begin + block) = 0xff;
	    	return;
	case 4:
		*ubh_get_addr(ubh, begin + (block >> 1)) |= (0x0f << ((block & 0x01) << 2));
		return;
	case 2:
		*ubh_get_addr(ubh, begin + (block >> 2)) |= (0x03 << ((block & 0x03) << 1));
		return;
	case 1:
		*ubh_get_addr(ubh, begin + (block >> 3)) |= (0x01 << ((block & 0x07)));
		return;
	}
}

static inline void ufs_fragacct (struct super_block * sb, unsigned blockmap,
	__fs32 * fraglist, int cnt)
{
	struct ufs_sb_private_info * uspi;
	unsigned fragsize, pos;
	
	uspi = UFS_SB(sb)->s_uspi;
	
	fragsize = 0;
	for (pos = 0; pos < uspi->s_fpb; pos++) {
		if (blockmap & (1 << pos)) {
			fragsize++;
		}
		else if (fragsize > 0) {
			fs32_add(sb, &fraglist[fragsize], cnt);
			fragsize = 0;
		}
	}
	if (fragsize > 0 && fragsize < uspi->s_fpb)
		fs32_add(sb, &fraglist[fragsize], cnt);
}

static inline void *ufs_get_direct_data_ptr(struct ufs_sb_private_info *uspi,
					    struct ufs_inode_info *ufsi,
					    unsigned blk)
{
	BUG_ON(blk > UFS_TIND_BLOCK);
	return uspi->fs_magic == UFS2_MAGIC ?
		(void *)&ufsi->i_u1.u2_i_data[blk] :
		(void *)&ufsi->i_u1.i_data[blk];
}

static inline u64 ufs_data_ptr_to_cpu(struct super_block *sb, void *p)
{
	return UFS_SB(sb)->s_uspi->fs_magic == UFS2_MAGIC ?
		fs64_to_cpu(sb, *(__fs64 *)p) :
		fs32_to_cpu(sb, *(__fs32 *)p);
}

static inline void ufs_cpu_to_data_ptr(struct super_block *sb, void *p, u64 val)
{
	if (UFS_SB(sb)->s_uspi->fs_magic == UFS2_MAGIC)
		*(__fs64 *)p = cpu_to_fs64(sb, val);
	else
		*(__fs32 *)p = cpu_to_fs32(sb, val);
}

static inline void ufs_data_ptr_clear(struct ufs_sb_private_info *uspi,
				      void *p)
{
	if (uspi->fs_magic == UFS2_MAGIC)
		*(__fs64 *)p = 0;
	else
		*(__fs32 *)p = 0;
}

static inline int ufs_is_data_ptr_zero(struct ufs_sb_private_info *uspi,
				       void *p)
{
	if (uspi->fs_magic == UFS2_MAGIC)
		return *(__fs64 *)p == 0;
	else
		return *(__fs32 *)p == 0;
}
Commit	Line	Data
1da177e4 LT	1	/*
	2	* linux/fs/ufs/util.h
	3	*
	4	* Copyright (C) 1998
	5	* Daniel Pirkl <[email protected]>
	6	* Charles University, Faculty of Mathematics and Physics
	7	*/
	8
	9	#include <linux/buffer_head.h>
	10	#include <linux/fs.h>
	11	#include "swab.h"
	12
	13
	14	/*
	15	* some useful macros
	16	*/
	17	#define in_range(b,first,len) ((b)>=(first)&&(b)<(first)+(len))
	18
	19	/*
9695ef16	20	* functions used for retyping
1da177e4	21	*/
9695ef16 ED	22	static inline struct ufs_buffer_head UCPI_UBH(struct ufs_cg_private_info cpi)
	23	{
	24	return &cpi->c_ubh;
	25	}
	26	static inline struct ufs_buffer_head USPI_UBH(struct ufs_sb_private_info spi)
	27	{
	28	return &spi->s_ubh;
	29	}
1da177e4 LT	30
	31
	32
	33	/*
	34	* macros used for accessing structures
	35	*/
	36	static inline s32
	37	ufs_get_fs_state(struct super_block sb, struct ufs_super_block_first usb1,
	38	struct ufs_super_block_third *usb3)
	39	{
	40	switch (UFS_SB(sb)->s_flags & UFS_ST_MASK) {
252e211e MF	41	case UFS_ST_SUNOS:
	42	if (fs32_to_cpu(sb, usb3->fs_postblformat) == UFS_42POSTBLFMT)
	43	return fs32_to_cpu(sb, usb1->fs_u0.fs_sun.fs_state);
	44	/* Fall Through to UFS_ST_SUN */
1da177e4	45	case UFS_ST_SUN:
647b7e87	46	return fs32_to_cpu(sb, usb3->fs_un2.fs_sun.fs_state);
1da177e4 LT	47	case UFS_ST_SUNx86:
	48	return fs32_to_cpu(sb, usb1->fs_u1.fs_sunx86.fs_state);
	49	case UFS_ST_44BSD:
	50	default:
647b7e87	51	return fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_state);
1da177e4 LT	52	}
	53	}
	54
	55	static inline void
	56	ufs_set_fs_state(struct super_block sb, struct ufs_super_block_first usb1,
	57	struct ufs_super_block_third *usb3, s32 value)
	58	{
	59	switch (UFS_SB(sb)->s_flags & UFS_ST_MASK) {
252e211e	60	case UFS_ST_SUNOS:
f81e8a43	61	if (fs32_to_cpu(sb, usb3->fs_postblformat) == UFS_42POSTBLFMT) {
252e211e MF	62	usb1->fs_u0.fs_sun.fs_state = cpu_to_fs32(sb, value);
	63	break;
	64	}
	65	/* Fall Through to UFS_ST_SUN */
1da177e4	66	case UFS_ST_SUN:
647b7e87	67	usb3->fs_un2.fs_sun.fs_state = cpu_to_fs32(sb, value);
1da177e4 LT	68	break;
	69	case UFS_ST_SUNx86:
	70	usb1->fs_u1.fs_sunx86.fs_state = cpu_to_fs32(sb, value);
	71	break;
	72	case UFS_ST_44BSD:
647b7e87	73	usb3->fs_un2.fs_44.fs_state = cpu_to_fs32(sb, value);
1da177e4 LT	74	break;
	75	}
	76	}
	77
	78	static inline u32
	79	ufs_get_fs_npsect(struct super_block sb, struct ufs_super_block_first usb1,
	80	struct ufs_super_block_third *usb3)
	81	{
	82	if ((UFS_SB(sb)->s_flags & UFS_ST_MASK) == UFS_ST_SUNx86)
647b7e87	83	return fs32_to_cpu(sb, usb3->fs_un2.fs_sunx86.fs_npsect);
1da177e4 LT	84	else
	85	return fs32_to_cpu(sb, usb1->fs_u1.fs_sun.fs_npsect);
	86	}
	87
	88	static inline u64
	89	ufs_get_fs_qbmask(struct super_block sb, struct ufs_super_block_third usb3)
	90	{
	91	__fs64 tmp;
	92
	93	switch (UFS_SB(sb)->s_flags & UFS_ST_MASK) {
252e211e	94	case UFS_ST_SUNOS:
1da177e4	95	case UFS_ST_SUN:
647b7e87 ED	96	((__fs32 *)&tmp)[0] = usb3->fs_un2.fs_sun.fs_qbmask[0];
647b7e87 ED	97	((__fs32 *)&tmp)[1] = usb3->fs_un2.fs_sun.fs_qbmask[1];
1da177e4 LT	98	break;
1da177e4 LT	99	case UFS_ST_SUNx86:
647b7e87 ED	100	((__fs32 *)&tmp)[0] = usb3->fs_un2.fs_sunx86.fs_qbmask[0];
647b7e87 ED	101	((__fs32 *)&tmp)[1] = usb3->fs_un2.fs_sunx86.fs_qbmask[1];
1da177e4 LT	102	break;
1da177e4 LT	103	case UFS_ST_44BSD:
647b7e87 ED	104	((__fs32 *)&tmp)[0] = usb3->fs_un2.fs_44.fs_qbmask[0];
647b7e87 ED	105	((__fs32 *)&tmp)[1] = usb3->fs_un2.fs_44.fs_qbmask[1];
1da177e4 LT	106	break;
	107	}
	108
	109	return fs64_to_cpu(sb, tmp);
	110	}
	111
	112	static inline u64
	113	ufs_get_fs_qfmask(struct super_block sb, struct ufs_super_block_third usb3)
	114	{
	115	__fs64 tmp;
	116
	117	switch (UFS_SB(sb)->s_flags & UFS_ST_MASK) {
252e211e	118	case UFS_ST_SUNOS:
1da177e4	119	case UFS_ST_SUN:
647b7e87 ED	120	((__fs32 *)&tmp)[0] = usb3->fs_un2.fs_sun.fs_qfmask[0];
647b7e87 ED	121	((__fs32 *)&tmp)[1] = usb3->fs_un2.fs_sun.fs_qfmask[1];
1da177e4 LT	122	break;
1da177e4 LT	123	case UFS_ST_SUNx86:
647b7e87 ED	124	((__fs32 *)&tmp)[0] = usb3->fs_un2.fs_sunx86.fs_qfmask[0];
647b7e87 ED	125	((__fs32 *)&tmp)[1] = usb3->fs_un2.fs_sunx86.fs_qfmask[1];
1da177e4 LT	126	break;
1da177e4 LT	127	case UFS_ST_44BSD:
647b7e87 ED	128	((__fs32 *)&tmp)[0] = usb3->fs_un2.fs_44.fs_qfmask[0];
647b7e87 ED	129	((__fs32 *)&tmp)[1] = usb3->fs_un2.fs_44.fs_qfmask[1];
1da177e4 LT	130	break;
	131	}
	132
	133	return fs64_to_cpu(sb, tmp);
	134	}
	135
	136	static inline u16
	137	ufs_get_de_namlen(struct super_block sb, struct ufs_dir_entry de)
	138	{
	139	if ((UFS_SB(sb)->s_flags & UFS_DE_MASK) == UFS_DE_OLD)
	140	return fs16_to_cpu(sb, de->d_u.d_namlen);
	141	else
	142	return de->d_u.d_44.d_namlen; /* XXX this seems wrong */
	143	}
	144
	145	static inline void
	146	ufs_set_de_namlen(struct super_block sb, struct ufs_dir_entry de, u16 value)
	147	{
	148	if ((UFS_SB(sb)->s_flags & UFS_DE_MASK) == UFS_DE_OLD)
	149	de->d_u.d_namlen = cpu_to_fs16(sb, value);
	150	else
	151	de->d_u.d_44.d_namlen = value; /* XXX this seems wrong */
	152	}
	153
	154	static inline void
	155	ufs_set_de_type(struct super_block sb, struct ufs_dir_entry de, int mode)
	156	{
	157	if ((UFS_SB(sb)->s_flags & UFS_DE_MASK) != UFS_DE_44BSD)
	158	return;
	159
	160	/*
	161	* TODO turn this into a table lookup
	162	*/
	163	switch (mode & S_IFMT) {
	164	case S_IFSOCK:
	165	de->d_u.d_44.d_type = DT_SOCK;
	166	break;
	167	case S_IFLNK:
	168	de->d_u.d_44.d_type = DT_LNK;
	169	break;
	170	case S_IFREG:
	171	de->d_u.d_44.d_type = DT_REG;
	172	break;
	173	case S_IFBLK:
	174	de->d_u.d_44.d_type = DT_BLK;
	175	break;
	176	case S_IFDIR:
	177	de->d_u.d_44.d_type = DT_DIR;
	178	break;
	179	case S_IFCHR:
	180	de->d_u.d_44.d_type = DT_CHR;
	181	break;
	182	case S_IFIFO:
	183	de->d_u.d_44.d_type = DT_FIFO;
	184	break;
	185	default:
	186	de->d_u.d_44.d_type = DT_UNKNOWN;
	187	}
	188	}
	189
	190	static inline u32
	191	ufs_get_inode_uid(struct super_block sb, struct ufs_inode inode)
	192	{
	193	switch (UFS_SB(sb)->s_flags & UFS_UID_MASK) {
1da177e4 LT	194	case UFS_UID_44BSD:
1da177e4 LT	195	return fs32_to_cpu(sb, inode->ui_u3.ui_44.ui_uid);
252e211e MF	196	case UFS_UID_EFT:
	197	if (inode->ui_u1.oldids.ui_suid == 0xFFFF)
	198	return fs32_to_cpu(sb, inode->ui_u3.ui_sun.ui_uid);
	199	/* Fall through */
1da177e4 LT	200	default:
	201	return fs16_to_cpu(sb, inode->ui_u1.oldids.ui_suid);
	202	}
	203	}
	204
	205	static inline void
	206	ufs_set_inode_uid(struct super_block sb, struct ufs_inode inode, u32 value)
	207	{
	208	switch (UFS_SB(sb)->s_flags & UFS_UID_MASK) {
1da177e4 LT	209	case UFS_UID_44BSD:
1da177e4 LT	210	inode->ui_u3.ui_44.ui_uid = cpu_to_fs32(sb, value);
252e211e MF	211	inode->ui_u1.oldids.ui_suid = cpu_to_fs16(sb, value);
	212	break;
	213	case UFS_UID_EFT:
	214	inode->ui_u3.ui_sun.ui_uid = cpu_to_fs32(sb, value);
	215	if (value > 0xFFFF)
	216	value = 0xFFFF;
	217	/* Fall through */
	218	default:
	219	inode->ui_u1.oldids.ui_suid = cpu_to_fs16(sb, value);
1da177e4 LT	220	break;
1da177e4 LT	221	}
1da177e4 LT	222	}
	223
	224	static inline u32
	225	ufs_get_inode_gid(struct super_block sb, struct ufs_inode inode)
	226	{
	227	switch (UFS_SB(sb)->s_flags & UFS_UID_MASK) {
1da177e4 LT	228	case UFS_UID_44BSD:
1da177e4 LT	229	return fs32_to_cpu(sb, inode->ui_u3.ui_44.ui_gid);
252e211e MF	230	case UFS_UID_EFT:
	231	if (inode->ui_u1.oldids.ui_suid == 0xFFFF)
	232	return fs32_to_cpu(sb, inode->ui_u3.ui_sun.ui_gid);
	233	/* Fall through */
1da177e4 LT	234	default:
	235	return fs16_to_cpu(sb, inode->ui_u1.oldids.ui_sgid);
	236	}
	237	}
	238
	239	static inline void
	240	ufs_set_inode_gid(struct super_block sb, struct ufs_inode inode, u32 value)
	241	{
	242	switch (UFS_SB(sb)->s_flags & UFS_UID_MASK) {
1da177e4 LT	243	case UFS_UID_44BSD:
1da177e4 LT	244	inode->ui_u3.ui_44.ui_gid = cpu_to_fs32(sb, value);
252e211e MF	245	inode->ui_u1.oldids.ui_sgid = cpu_to_fs16(sb, value);
	246	break;
	247	case UFS_UID_EFT:
	248	inode->ui_u3.ui_sun.ui_gid = cpu_to_fs32(sb, value);
	249	if (value > 0xFFFF)
	250	value = 0xFFFF;
	251	/* Fall through */
	252	default:
	253	inode->ui_u1.oldids.ui_sgid = cpu_to_fs16(sb, value);
1da177e4 LT	254	break;
1da177e4 LT	255	}
1da177e4 LT	256	}
	257
	258	extern dev_t ufs_get_inode_dev(struct super_block , struct ufs_inode_info );
	259	extern void ufs_set_inode_dev(struct super_block , struct ufs_inode_info , dev_t);
f4e420dc	260	extern int ufs_prepare_chunk(struct page *page, loff_t pos, unsigned len);
1da177e4 LT	261
	262	/*
	263	* These functions manipulate ufs buffers
	264	*/
	265	#define ubh_bread(sb,fragment,size) _ubh_bread_(uspi,sb,fragment,size)
	266	extern struct ufs_buffer_head * _ubh_bread_(struct ufs_sb_private_info , struct super_block , u64 , u64);
	267	extern struct ufs_buffer_head * ubh_bread_uspi(struct ufs_sb_private_info , struct super_block , u64, u64);
	268	extern void ubh_brelse (struct ufs_buffer_head *);
	269	extern void ubh_brelse_uspi (struct ufs_sb_private_info *);
	270	extern void ubh_mark_buffer_dirty (struct ufs_buffer_head *);
	271	extern void ubh_mark_buffer_uptodate (struct ufs_buffer_head *, int);
9cb569d6	272	extern void ubh_sync_block(struct ufs_buffer_head *);
1da177e4 LT	273	extern void ubh_bforget (struct ufs_buffer_head *);
	274	extern int ubh_buffer_dirty (struct ufs_buffer_head *);
	275	#define ubh_ubhcpymem(mem,ubh,size) _ubh_ubhcpymem_(uspi,mem,ubh,size)
	276	extern void _ubh_ubhcpymem_(struct ufs_sb_private_info , unsigned char , struct ufs_buffer_head *, unsigned);
	277	#define ubh_memcpyubh(ubh,mem,size) _ubh_memcpyubh_(uspi,ubh,mem,size)
	278	extern void _ubh_memcpyubh_(struct ufs_sb_private_info , struct ufs_buffer_head , unsigned char *, unsigned);
	279
10e5dce0 ED	280	/* This functions works with cache pages*/
	281	extern struct page ufs_get_locked_page(struct address_space mapping,
	282	pgoff_t index);
	283	static inline void ufs_put_locked_page(struct page *page)
	284	{
	285	unlock_page(page);
09cbfeaf	286	put_page(page);
10e5dce0	287	}
1da177e4 LT	288
	289
	290	/*
7b4ee73e	291	* macros and inline function to get important structures from ufs_sb_private_info
1da177e4	292	*/
1da177e4	293
7b4ee73e E	294	static inline void get_usb_offset(struct ufs_sb_private_info uspi,
	295	unsigned int offset)
	296	{
	297	unsigned int index;
	298
	299	index = offset >> uspi->s_fshift;
	300	offset &= ~uspi->s_fmask;
	301	return uspi->s_ubh.bh[index]->b_data + offset;
	302	}
	303
	304	#define ubh_get_usb_first(uspi) \
	305	((struct ufs_super_block_first *)get_usb_offset((uspi), 0))
	306
	307	#define ubh_get_usb_second(uspi) \
	308	((struct ufs_super_block_second *)get_usb_offset((uspi), UFS_SECTOR_SIZE))
	309
	310	#define ubh_get_usb_third(uspi) \
	311	((struct ufs_super_block_third )get_usb_offset((uspi), 2UFS_SECTOR_SIZE))
1da177e4	312
1da177e4 LT	313
	314	#define ubh_get_ucg(ubh) \
	315	((struct ufs_cylinder_group *)((ubh)->bh[0]->b_data))
	316
	317
	318	/*
	319	* Extract byte from ufs_buffer_head
	320	* Extract the bits for a block from a map inside ufs_buffer_head
	321	*/
	322	#define ubh_get_addr8(ubh,begin) \
	323	((u8*)(ubh)->bh[(begin) >> uspi->s_fshift]->b_data + \
	324	((begin) & ~uspi->s_fmask))
	325
	326	#define ubh_get_addr16(ubh,begin) \
	327	(((__fs16*)((ubh)->bh[(begin) >> (uspi->s_fshift-1)]->b_data)) + \
71a3d1b4	328	((begin) & ((uspi->fsize>>1) - 1)))
1da177e4 LT	329
	330	#define ubh_get_addr32(ubh,begin) \
	331	(((__fs32*)((ubh)->bh[(begin) >> (uspi->s_fshift-2)]->b_data)) + \
	332	((begin) & ((uspi->s_fsize>>2) - 1)))
	333
54fb996a ED	334	#define ubh_get_addr64(ubh,begin) \
	335	(((__fs64*)((ubh)->bh[(begin) >> (uspi->s_fshift-3)]->b_data)) + \
	336	((begin) & ((uspi->s_fsize>>3) - 1)))
	337
1da177e4 LT	338	#define ubh_get_addr ubh_get_addr8
1da177e4 LT	339
54fb996a ED	340	static inline void ubh_get_data_ptr(struct ufs_sb_private_info uspi,
	341	struct ufs_buffer_head *ubh,
	342	u64 blk)
	343	{
	344	if (uspi->fs_magic == UFS2_MAGIC)
	345	return ubh_get_addr64(ubh, blk);
	346	else
	347	return ubh_get_addr32(ubh, blk);
	348	}
	349
1da177e4 LT	350	#define ubh_blkmap(ubh,begin,bit) \
	351	((*ubh_get_addr(ubh, (begin) + ((bit) >> 3)) >> ((bit) & 7)) & (0xff >> (UFS_MAXFRAG - uspi->s_fpb)))
	352
1da177e4 LT	353	/*
	354	* Determine the number of available frags given a
	355	* percentage to hold in reserve.
	356	*/
ee3ffd6c ED	357	static inline u64
	358	ufs_freespace(struct ufs_sb_private_info *uspi, int percentreserved)
	359	{
	360	return ufs_blkstofrags(uspi->cs_total.cs_nbfree) +
	361	uspi->cs_total.cs_nffree -
	362	(uspi->s_dsize * (percentreserved) / 100);
	363	}
1da177e4 LT	364
	365	/*
	366	* Macros to access cylinder group array structures
	367	*/
	368	#define ubh_cg_blktot(ucpi,cylno) \
9695ef16	369	(((__fs32)ubh_get_addr(UCPI_UBH(ucpi), (ucpi)->c_btotoff + ((cylno) << 2))))
1da177e4 LT	370
1da177e4 LT	371	#define ubh_cg_blks(ucpi,cylno,rpos) \
9695ef16	372	(((__fs16)ubh_get_addr(UCPI_UBH(ucpi), \
1da177e4 LT	373	(ucpi)->c_boff + (((cylno) * uspi->s_nrpos + (rpos)) << 1 ))))
	374
	375	/*
	376	* Bitmap operations
	377	* These functions work like classical bitmap operations.
	378	* The difference is that we don't have the whole bitmap
	379	* in one contiguous chunk of memory, but in several buffers.
	380	* The parameters of each function are super_block, ufs_buffer_head and
	381	* position of the beginning of the bitmap.
	382	*/
	383	#define ubh_setbit(ubh,begin,bit) \
	384	(*ubh_get_addr(ubh, (begin) + ((bit) >> 3)) \|= (1 << ((bit) & 7)))
	385
	386	#define ubh_clrbit(ubh,begin,bit) \
	387	(*ubh_get_addr (ubh, (begin) + ((bit) >> 3)) &= ~(1 << ((bit) & 7)))
	388
	389	#define ubh_isset(ubh,begin,bit) \
	390	(*ubh_get_addr (ubh, (begin) + ((bit) >> 3)) & (1 << ((bit) & 7)))
	391
	392	#define ubh_isclr(ubh,begin,bit) (!ubh_isset(ubh,begin,bit))
	393
	394	#define ubh_find_first_zero_bit(ubh,begin,size) _ubh_find_next_zero_bit_(uspi,ubh,begin,size,0)
	395
	396	#define ubh_find_next_zero_bit(ubh,begin,size,offset) _ubh_find_next_zero_bit_(uspi,ubh,begin,size,offset)
	397	static inline unsigned _ubh_find_next_zero_bit_(
	398	struct ufs_sb_private_info * uspi, struct ufs_buffer_head * ubh,
	399	unsigned begin, unsigned size, unsigned offset)
	400	{
	401	unsigned base, count, pos;
	402
	403	size -= offset;
	404	begin <<= 3;
	405	offset += begin;
	406	base = offset >> uspi->s_bpfshift;
	407	offset &= uspi->s_bpfmask;
	408	for (;;) {
	409	count = min_t(unsigned int, size + offset, uspi->s_bpf);
	410	size -= count - offset;
3cdc7125	411	pos = find_next_zero_bit_le(ubh->bh[base]->b_data, count, offset);
1da177e4 LT	412	if (pos < count \|\| !size)
	413	break;
	414	base++;
	415	offset = 0;
	416	}
	417	return (base << uspi->s_bpfshift) + pos - begin;
	418	}
	419
	420	static inline unsigned find_last_zero_bit (unsigned char * bitmap,
	421	unsigned size, unsigned offset)
	422	{
	423	unsigned bit, i;
	424	unsigned char * mapp;
	425	unsigned char map;
	426
	427	mapp = bitmap + (size >> 3);
	428	map = *mapp--;
	429	bit = 1 << (size & 7);
	430	for (i = size; i > offset; i--) {
	431	if ((map & bit) == 0)
	432	break;
	433	if ((i & 7) != 0) {
	434	bit >>= 1;
	435	} else {
	436	map = *mapp--;
	437	bit = 1 << 7;
	438	}
	439	}
	440	return i;
	441	}
	442
	443	#define ubh_find_last_zero_bit(ubh,begin,size,offset) _ubh_find_last_zero_bit_(uspi,ubh,begin,size,offset)
	444	static inline unsigned _ubh_find_last_zero_bit_(
	445	struct ufs_sb_private_info * uspi, struct ufs_buffer_head * ubh,
	446	unsigned begin, unsigned start, unsigned end)
	447	{
	448	unsigned base, count, pos, size;
	449
	450	size = start - end;
	451	begin <<= 3;
	452	start += begin;
	453	base = start >> uspi->s_bpfshift;
	454	start &= uspi->s_bpfmask;
	455	for (;;) {
	456	count = min_t(unsigned int,
	457	size + (uspi->s_bpf - start), uspi->s_bpf)
	458	- (uspi->s_bpf - start);
	459	size -= count;
	460	pos = find_last_zero_bit (ubh->bh[base]->b_data,
	461	start, start - count);
	462	if (pos > start - count \|\| !size)
	463	break;
	464	base--;
	465	start = uspi->s_bpf;
	466	}
	467	return (base << uspi->s_bpfshift) + pos - begin;
	468	}
	469
	470	#define ubh_isblockclear(ubh,begin,block) (!_ubh_isblockset_(uspi,ubh,begin,block))
	471
	472	#define ubh_isblockset(ubh,begin,block) _ubh_isblockset_(uspi,ubh,begin,block)
	473	static inline int _ubh_isblockset_(struct ufs_sb_private_info * uspi,
	474	struct ufs_buffer_head * ubh, unsigned begin, unsigned block)
	475	{
476	switch (uspi->s_fpb) {
477	case 8:
478	return (*ubh_get_addr (ubh, begin + block) == 0xff);
479	case 4:
480	return (*ubh_get_addr (ubh, begin + (block >> 1)) == (0x0f << ((block & 0x01) << 2)));
481	case 2:
482	return (*ubh_get_addr (ubh, begin + (block >> 2)) == (0x03 << ((block & 0x03) << 1)));
483	case 1:
484	return (*ubh_get_addr (ubh, begin + (block >> 3)) == (0x01 << (block & 0x07)));
485	}
486	return 0;
487	}
488
489	#define ubh_clrblock(ubh,begin,block) _ubh_clrblock_(uspi,ubh,begin,block)
490	static inline void _ubh_clrblock_(struct ufs_sb_private_info * uspi,
491	struct ufs_buffer_head * ubh, unsigned begin, unsigned block)
492	{
493	switch (uspi->s_fpb) {
494	case 8:
495	*ubh_get_addr (ubh, begin + block) = 0x00;
496	return;
497	case 4:
498	*ubh_get_addr (ubh, begin + (block >> 1)) &= ~(0x0f << ((block & 0x01) << 2));
499	return;
500	case 2:
501	*ubh_get_addr (ubh, begin + (block >> 2)) &= ~(0x03 << ((block & 0x03) << 1));
502	return;
503	case 1:
504	*ubh_get_addr (ubh, begin + (block >> 3)) &= ~(0x01 << ((block & 0x07)));
505	return;
506	}
507	}
508
509	#define ubh_setblock(ubh,begin,block) _ubh_setblock_(uspi,ubh,begin,block)
510	static inline void _ubh_setblock_(struct ufs_sb_private_info * uspi,
511	struct ufs_buffer_head * ubh, unsigned begin, unsigned block)
512	{
513	switch (uspi->s_fpb) {
514	case 8:
515	*ubh_get_addr(ubh, begin + block) = 0xff;
516	return;
517	case 4:
518	*ubh_get_addr(ubh, begin + (block >> 1)) \|= (0x0f << ((block & 0x01) << 2));
519	return;
520	case 2:
521	*ubh_get_addr(ubh, begin + (block >> 2)) \|= (0x03 << ((block & 0x03) << 1));
522	return;
523	case 1:
524	*ubh_get_addr(ubh, begin + (block >> 3)) \|= (0x01 << ((block & 0x07)));
525	return;
526	}
527	}
528
529	static inline void ufs_fragacct (struct super_block * sb, unsigned blockmap,
530	__fs32 * fraglist, int cnt)
531	{
532	struct ufs_sb_private_info * uspi;
533	unsigned fragsize, pos;
534
535	uspi = UFS_SB(sb)->s_uspi;
536
537	fragsize = 0;
538	for (pos = 0; pos < uspi->s_fpb; pos++) {
539	if (blockmap & (1 << pos)) {
540	fragsize++;
541	}
542	else if (fragsize > 0) {
543	fs32_add(sb, &fraglist[fragsize], cnt);
544	fragsize = 0;
545	}
546	}
547	if (fragsize > 0 && fragsize < uspi->s_fpb)
548	fs32_add(sb, &fraglist[fragsize], cnt);
549	}
54fb996a ED	550
	551	static inline void ufs_get_direct_data_ptr(struct ufs_sb_private_info uspi,
	552	struct ufs_inode_info *ufsi,
	553	unsigned blk)
	554	{
	555	BUG_ON(blk > UFS_TIND_BLOCK);
	556	return uspi->fs_magic == UFS2_MAGIC ?
	557	(void *)&ufsi->i_u1.u2_i_data[blk] :
	558	(void *)&ufsi->i_u1.i_data[blk];
	559	}
	560
	561	static inline u64 ufs_data_ptr_to_cpu(struct super_block sb, void p)
	562	{
	563	return UFS_SB(sb)->s_uspi->fs_magic == UFS2_MAGIC ?
	564	fs64_to_cpu(sb, (__fs64 )p) :
	565	fs32_to_cpu(sb, (__fs32 )p);
	566	}
	567
	568	static inline void ufs_cpu_to_data_ptr(struct super_block sb, void p, u64 val)
	569	{
	570	if (UFS_SB(sb)->s_uspi->fs_magic == UFS2_MAGIC)
	571	(__fs64 )p = cpu_to_fs64(sb, val);
	572	else
	573	(__fs32 )p = cpu_to_fs32(sb, val);
	574	}
	575
	576	static inline void ufs_data_ptr_clear(struct ufs_sb_private_info *uspi,
	577	void *p)
	578	{
	579	if (uspi->fs_magic == UFS2_MAGIC)
	580	(__fs64 )p = 0;
	581	else
	582	(__fs32 )p = 0;
	583	}
	584
	585	static inline int ufs_is_data_ptr_zero(struct ufs_sb_private_info *uspi,
	586	void *p)
	587	{
	588	if (uspi->fs_magic == UFS2_MAGIC)
	589	return (__fs64 )p == 0;
	590	else
	591	return (__fs32 )p == 0;
	592	}