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

/* SPDX-License-Identifier: GPL-2.0 */
/*
 *  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);
		fallthrough;	/* 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;
		}
		fallthrough;	/* 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);
		fallthrough;
	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;
		fallthrough;
	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_sgid == 0xFFFF)
			return fs32_to_cpu(sb, inode->ui_u3.ui_sun.ui_gid);
		fallthrough;
	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;
		fallthrough;
	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)))

static inline u64
ufs_freefrags(struct ufs_sb_private_info *uspi)
{
	return ufs_blkstofrags(uspi->cs_total.cs_nbfree) +
		uspi->cs_total.cs_nffree;
}

/*
 * 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)
{
	u8 mask;
	switch (uspi->s_fpb) {
	case 8:
	    	return (*ubh_get_addr (ubh, begin + block) == 0xff);
	case 4:
		mask = 0x0f << ((block & 0x01) << 2);
		return (*ubh_get_addr (ubh, begin + (block >> 1)) & mask) == mask;
	case 2:
		mask = 0x03 << ((block & 0x03) << 1);
		return (*ubh_get_addr (ubh, begin + (block >> 2)) & mask) == mask;
	case 1:
		mask = 0x01 << (block & 0x07);
		return (*ubh_get_addr (ubh, begin + (block >> 3)) & mask) == mask;
	}
	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;
}

static inline __fs32 ufs_get_seconds(struct super_block *sbp)
{
	time64_t now = ktime_get_real_seconds();

	/* Signed 32-bit interpretation wraps around in 2038, which
	 * happens in ufs1 inode stamps but not ufs2 using 64-bits
	 * stamps. For superblock and blockgroup, let's assume
	 * unsigned 32-bit stamps, which are good until y2106.
	 * Wrap around rather than clamp here to make the dirty
	 * file system detection work in the superblock stamp.
	 */
	return cpu_to_fs32(sbp, lower_32_bits(now));
}
Commit	Line	Data
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
1da177e4 LT	2	/*
	3	* linux/fs/ufs/util.h
	4	*
	5	* Copyright (C) 1998
	6	* Daniel Pirkl <[email protected]>
	7	* Charles University, Faculty of Mathematics and Physics
	8	*/
	9
	10	#include <linux/buffer_head.h>
	11	#include <linux/fs.h>
	12	#include "swab.h"
	13
	14
	15	/*
	16	* some useful macros
	17	*/
	18	#define in_range(b,first,len) ((b)>=(first)&&(b)<(first)+(len))
	19
	20	/*
9695ef16	21	* functions used for retyping
1da177e4	22	*/
9695ef16 ED	23	static inline struct ufs_buffer_head UCPI_UBH(struct ufs_cg_private_info cpi)
	24	{
	25	return &cpi->c_ubh;
	26	}
	27	static inline struct ufs_buffer_head USPI_UBH(struct ufs_sb_private_info spi)
	28	{
	29	return &spi->s_ubh;
	30	}
1da177e4 LT	31
	32
	33
	34	/*
	35	* macros used for accessing structures
	36	*/
	37	static inline s32
	38	ufs_get_fs_state(struct super_block sb, struct ufs_super_block_first usb1,
	39	struct ufs_super_block_third *usb3)
	40	{
	41	switch (UFS_SB(sb)->s_flags & UFS_ST_MASK) {
252e211e MF	42	case UFS_ST_SUNOS:
	43	if (fs32_to_cpu(sb, usb3->fs_postblformat) == UFS_42POSTBLFMT)
	44	return fs32_to_cpu(sb, usb1->fs_u0.fs_sun.fs_state);
df561f66	45	fallthrough; /* to UFS_ST_SUN */
1da177e4	46	case UFS_ST_SUN:
647b7e87	47	return fs32_to_cpu(sb, usb3->fs_un2.fs_sun.fs_state);
1da177e4 LT	48	case UFS_ST_SUNx86:
	49	return fs32_to_cpu(sb, usb1->fs_u1.fs_sunx86.fs_state);
	50	case UFS_ST_44BSD:
	51	default:
647b7e87	52	return fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_state);
1da177e4 LT	53	}
	54	}
	55
	56	static inline void
	57	ufs_set_fs_state(struct super_block sb, struct ufs_super_block_first usb1,
	58	struct ufs_super_block_third *usb3, s32 value)
	59	{
	60	switch (UFS_SB(sb)->s_flags & UFS_ST_MASK) {
252e211e	61	case UFS_ST_SUNOS:
f81e8a43	62	if (fs32_to_cpu(sb, usb3->fs_postblformat) == UFS_42POSTBLFMT) {
252e211e MF	63	usb1->fs_u0.fs_sun.fs_state = cpu_to_fs32(sb, value);
	64	break;
	65	}
df561f66	66	fallthrough; /* to UFS_ST_SUN */
1da177e4	67	case UFS_ST_SUN:
647b7e87	68	usb3->fs_un2.fs_sun.fs_state = cpu_to_fs32(sb, value);
1da177e4 LT	69	break;
	70	case UFS_ST_SUNx86:
	71	usb1->fs_u1.fs_sunx86.fs_state = cpu_to_fs32(sb, value);
	72	break;
	73	case UFS_ST_44BSD:
647b7e87	74	usb3->fs_un2.fs_44.fs_state = cpu_to_fs32(sb, value);
1da177e4 LT	75	break;
	76	}
	77	}
	78
	79	static inline u32
	80	ufs_get_fs_npsect(struct super_block sb, struct ufs_super_block_first usb1,
	81	struct ufs_super_block_third *usb3)
	82	{
	83	if ((UFS_SB(sb)->s_flags & UFS_ST_MASK) == UFS_ST_SUNx86)
647b7e87	84	return fs32_to_cpu(sb, usb3->fs_un2.fs_sunx86.fs_npsect);
1da177e4 LT	85	else
	86	return fs32_to_cpu(sb, usb1->fs_u1.fs_sun.fs_npsect);
	87	}
	88
	89	static inline u64
	90	ufs_get_fs_qbmask(struct super_block sb, struct ufs_super_block_third usb3)
	91	{
	92	__fs64 tmp;
	93
	94	switch (UFS_SB(sb)->s_flags & UFS_ST_MASK) {
252e211e	95	case UFS_ST_SUNOS:
1da177e4	96	case UFS_ST_SUN:
647b7e87 ED	97	((__fs32 *)&tmp)[0] = usb3->fs_un2.fs_sun.fs_qbmask[0];
647b7e87 ED	98	((__fs32 *)&tmp)[1] = usb3->fs_un2.fs_sun.fs_qbmask[1];
1da177e4 LT	99	break;
1da177e4 LT	100	case UFS_ST_SUNx86:
647b7e87 ED	101	((__fs32 *)&tmp)[0] = usb3->fs_un2.fs_sunx86.fs_qbmask[0];
647b7e87 ED	102	((__fs32 *)&tmp)[1] = usb3->fs_un2.fs_sunx86.fs_qbmask[1];
1da177e4 LT	103	break;
1da177e4 LT	104	case UFS_ST_44BSD:
647b7e87 ED	105	((__fs32 *)&tmp)[0] = usb3->fs_un2.fs_44.fs_qbmask[0];
647b7e87 ED	106	((__fs32 *)&tmp)[1] = usb3->fs_un2.fs_44.fs_qbmask[1];
1da177e4 LT	107	break;
	108	}
	109
	110	return fs64_to_cpu(sb, tmp);
	111	}
	112
	113	static inline u64
	114	ufs_get_fs_qfmask(struct super_block sb, struct ufs_super_block_third usb3)
	115	{
	116	__fs64 tmp;
	117
	118	switch (UFS_SB(sb)->s_flags & UFS_ST_MASK) {
252e211e	119	case UFS_ST_SUNOS:
1da177e4	120	case UFS_ST_SUN:
647b7e87 ED	121	((__fs32 *)&tmp)[0] = usb3->fs_un2.fs_sun.fs_qfmask[0];
647b7e87 ED	122	((__fs32 *)&tmp)[1] = usb3->fs_un2.fs_sun.fs_qfmask[1];
1da177e4 LT	123	break;
1da177e4 LT	124	case UFS_ST_SUNx86:
647b7e87 ED	125	((__fs32 *)&tmp)[0] = usb3->fs_un2.fs_sunx86.fs_qfmask[0];
647b7e87 ED	126	((__fs32 *)&tmp)[1] = usb3->fs_un2.fs_sunx86.fs_qfmask[1];
1da177e4 LT	127	break;
1da177e4 LT	128	case UFS_ST_44BSD:
647b7e87 ED	129	((__fs32 *)&tmp)[0] = usb3->fs_un2.fs_44.fs_qfmask[0];
647b7e87 ED	130	((__fs32 *)&tmp)[1] = usb3->fs_un2.fs_44.fs_qfmask[1];
1da177e4 LT	131	break;
	132	}
	133
	134	return fs64_to_cpu(sb, tmp);
	135	}
	136
	137	static inline u16
	138	ufs_get_de_namlen(struct super_block sb, struct ufs_dir_entry de)
	139	{
	140	if ((UFS_SB(sb)->s_flags & UFS_DE_MASK) == UFS_DE_OLD)
	141	return fs16_to_cpu(sb, de->d_u.d_namlen);
	142	else
	143	return de->d_u.d_44.d_namlen; /* XXX this seems wrong */
	144	}
	145
	146	static inline void
	147	ufs_set_de_namlen(struct super_block sb, struct ufs_dir_entry de, u16 value)
	148	{
	149	if ((UFS_SB(sb)->s_flags & UFS_DE_MASK) == UFS_DE_OLD)
	150	de->d_u.d_namlen = cpu_to_fs16(sb, value);
	151	else
	152	de->d_u.d_44.d_namlen = value; /* XXX this seems wrong */
	153	}
	154
	155	static inline void
	156	ufs_set_de_type(struct super_block sb, struct ufs_dir_entry de, int mode)
	157	{
	158	if ((UFS_SB(sb)->s_flags & UFS_DE_MASK) != UFS_DE_44BSD)
	159	return;
	160
	161	/*
	162	* TODO turn this into a table lookup
	163	*/
	164	switch (mode & S_IFMT) {
	165	case S_IFSOCK:
	166	de->d_u.d_44.d_type = DT_SOCK;
	167	break;
	168	case S_IFLNK:
	169	de->d_u.d_44.d_type = DT_LNK;
	170	break;
	171	case S_IFREG:
	172	de->d_u.d_44.d_type = DT_REG;
	173	break;
	174	case S_IFBLK:
	175	de->d_u.d_44.d_type = DT_BLK;
	176	break;
	177	case S_IFDIR:
	178	de->d_u.d_44.d_type = DT_DIR;
	179	break;
	180	case S_IFCHR:
	181	de->d_u.d_44.d_type = DT_CHR;
	182	break;
	183	case S_IFIFO:
	184	de->d_u.d_44.d_type = DT_FIFO;
	185	break;
	186	default:
	187	de->d_u.d_44.d_type = DT_UNKNOWN;
	188	}
	189	}
	190
	191	static inline u32
	192	ufs_get_inode_uid(struct super_block sb, struct ufs_inode inode)
	193	{
	194	switch (UFS_SB(sb)->s_flags & UFS_UID_MASK) {
1da177e4 LT	195	case UFS_UID_44BSD:
1da177e4 LT	196	return fs32_to_cpu(sb, inode->ui_u3.ui_44.ui_uid);
252e211e MF	197	case UFS_UID_EFT:
	198	if (inode->ui_u1.oldids.ui_suid == 0xFFFF)
	199	return fs32_to_cpu(sb, inode->ui_u3.ui_sun.ui_uid);
df561f66	200	fallthrough;
1da177e4 LT	201	default:
	202	return fs16_to_cpu(sb, inode->ui_u1.oldids.ui_suid);
	203	}
	204	}
	205
	206	static inline void
	207	ufs_set_inode_uid(struct super_block sb, struct ufs_inode inode, u32 value)
	208	{
	209	switch (UFS_SB(sb)->s_flags & UFS_UID_MASK) {
1da177e4 LT	210	case UFS_UID_44BSD:
1da177e4 LT	211	inode->ui_u3.ui_44.ui_uid = cpu_to_fs32(sb, value);
252e211e MF	212	inode->ui_u1.oldids.ui_suid = cpu_to_fs16(sb, value);
	213	break;
	214	case UFS_UID_EFT:
	215	inode->ui_u3.ui_sun.ui_uid = cpu_to_fs32(sb, value);
	216	if (value > 0xFFFF)
	217	value = 0xFFFF;
df561f66	218	fallthrough;
252e211e MF	219	default:
252e211e MF	220	inode->ui_u1.oldids.ui_suid = cpu_to_fs16(sb, value);
1da177e4 LT	221	break;
1da177e4 LT	222	}
1da177e4 LT	223	}
	224
	225	static inline u32
	226	ufs_get_inode_gid(struct super_block sb, struct ufs_inode inode)
	227	{
	228	switch (UFS_SB(sb)->s_flags & UFS_UID_MASK) {
1da177e4 LT	229	case UFS_UID_44BSD:
1da177e4 LT	230	return fs32_to_cpu(sb, inode->ui_u3.ui_44.ui_gid);
252e211e	231	case UFS_UID_EFT:
4e903604	232	if (inode->ui_u1.oldids.ui_sgid == 0xFFFF)
252e211e	233	return fs32_to_cpu(sb, inode->ui_u3.ui_sun.ui_gid);
df561f66	234	fallthrough;
1da177e4 LT	235	default:
	236	return fs16_to_cpu(sb, inode->ui_u1.oldids.ui_sgid);
	237	}
	238	}
	239
	240	static inline void
	241	ufs_set_inode_gid(struct super_block sb, struct ufs_inode inode, u32 value)
	242	{
	243	switch (UFS_SB(sb)->s_flags & UFS_UID_MASK) {
1da177e4 LT	244	case UFS_UID_44BSD:
1da177e4 LT	245	inode->ui_u3.ui_44.ui_gid = cpu_to_fs32(sb, value);
252e211e MF	246	inode->ui_u1.oldids.ui_sgid = cpu_to_fs16(sb, value);
	247	break;
	248	case UFS_UID_EFT:
	249	inode->ui_u3.ui_sun.ui_gid = cpu_to_fs32(sb, value);
	250	if (value > 0xFFFF)
	251	value = 0xFFFF;
df561f66	252	fallthrough;
252e211e MF	253	default:
252e211e MF	254	inode->ui_u1.oldids.ui_sgid = cpu_to_fs16(sb, value);
1da177e4 LT	255	break;
1da177e4 LT	256	}
1da177e4 LT	257	}
	258
	259	extern dev_t ufs_get_inode_dev(struct super_block , struct ufs_inode_info );
	260	extern void ufs_set_inode_dev(struct super_block , struct ufs_inode_info , dev_t);
f4e420dc	261	extern int ufs_prepare_chunk(struct page *page, loff_t pos, unsigned len);
1da177e4 LT	262
	263	/*
	264	* These functions manipulate ufs buffers
	265	*/
	266	#define ubh_bread(sb,fragment,size) _ubh_bread_(uspi,sb,fragment,size)
	267	extern struct ufs_buffer_head * _ubh_bread_(struct ufs_sb_private_info , struct super_block , u64 , u64);
	268	extern struct ufs_buffer_head * ubh_bread_uspi(struct ufs_sb_private_info , struct super_block , u64, u64);
	269	extern void ubh_brelse (struct ufs_buffer_head *);
	270	extern void ubh_brelse_uspi (struct ufs_sb_private_info *);
	271	extern void ubh_mark_buffer_dirty (struct ufs_buffer_head *);
	272	extern void ubh_mark_buffer_uptodate (struct ufs_buffer_head *, int);
9cb569d6	273	extern void ubh_sync_block(struct ufs_buffer_head *);
1da177e4 LT	274	extern void ubh_bforget (struct ufs_buffer_head *);
	275	extern int ubh_buffer_dirty (struct ufs_buffer_head *);
	276	#define ubh_ubhcpymem(mem,ubh,size) _ubh_ubhcpymem_(uspi,mem,ubh,size)
	277	extern void _ubh_ubhcpymem_(struct ufs_sb_private_info , unsigned char , struct ufs_buffer_head *, unsigned);
	278	#define ubh_memcpyubh(ubh,mem,size) _ubh_memcpyubh_(uspi,ubh,mem,size)
	279	extern void _ubh_memcpyubh_(struct ufs_sb_private_info , struct ufs_buffer_head , unsigned char *, unsigned);
	280
10e5dce0 ED	281	/* This functions works with cache pages*/
	282	extern struct page ufs_get_locked_page(struct address_space mapping,
	283	pgoff_t index);
	284	static inline void ufs_put_locked_page(struct page *page)
	285	{
	286	unlock_page(page);
09cbfeaf	287	put_page(page);
10e5dce0	288	}
1da177e4 LT	289
	290
	291	/*
7b4ee73e	292	* macros and inline function to get important structures from ufs_sb_private_info
1da177e4	293	*/
1da177e4	294
7b4ee73e E	295	static inline void get_usb_offset(struct ufs_sb_private_info uspi,
	296	unsigned int offset)
	297	{
	298	unsigned int index;
	299
	300	index = offset >> uspi->s_fshift;
	301	offset &= ~uspi->s_fmask;
	302	return uspi->s_ubh.bh[index]->b_data + offset;
	303	}
	304
	305	#define ubh_get_usb_first(uspi) \
	306	((struct ufs_super_block_first *)get_usb_offset((uspi), 0))
	307
	308	#define ubh_get_usb_second(uspi) \
	309	((struct ufs_super_block_second *)get_usb_offset((uspi), UFS_SECTOR_SIZE))
	310
	311	#define ubh_get_usb_third(uspi) \
	312	((struct ufs_super_block_third )get_usb_offset((uspi), 2UFS_SECTOR_SIZE))
1da177e4	313
1da177e4 LT	314
	315	#define ubh_get_ucg(ubh) \
	316	((struct ufs_cylinder_group *)((ubh)->bh[0]->b_data))
	317
	318
	319	/*
	320	* Extract byte from ufs_buffer_head
	321	* Extract the bits for a block from a map inside ufs_buffer_head
	322	*/
	323	#define ubh_get_addr8(ubh,begin) \
	324	((u8*)(ubh)->bh[(begin) >> uspi->s_fshift]->b_data + \
	325	((begin) & ~uspi->s_fmask))
	326
	327	#define ubh_get_addr16(ubh,begin) \
	328	(((__fs16*)((ubh)->bh[(begin) >> (uspi->s_fshift-1)]->b_data)) + \
71a3d1b4	329	((begin) & ((uspi->fsize>>1) - 1)))
1da177e4 LT	330
	331	#define ubh_get_addr32(ubh,begin) \
	332	(((__fs32*)((ubh)->bh[(begin) >> (uspi->s_fshift-2)]->b_data)) + \
	333	((begin) & ((uspi->s_fsize>>2) - 1)))
	334
54fb996a ED	335	#define ubh_get_addr64(ubh,begin) \
	336	(((__fs64*)((ubh)->bh[(begin) >> (uspi->s_fshift-3)]->b_data)) + \
	337	((begin) & ((uspi->s_fsize>>3) - 1)))
	338
1da177e4 LT	339	#define ubh_get_addr ubh_get_addr8
1da177e4 LT	340
54fb996a ED	341	static inline void ubh_get_data_ptr(struct ufs_sb_private_info uspi,
	342	struct ufs_buffer_head *ubh,
	343	u64 blk)
	344	{
	345	if (uspi->fs_magic == UFS2_MAGIC)
	346	return ubh_get_addr64(ubh, blk);
	347	else
	348	return ubh_get_addr32(ubh, blk);
	349	}
	350
1da177e4 LT	351	#define ubh_blkmap(ubh,begin,bit) \
	352	((*ubh_get_addr(ubh, (begin) + ((bit) >> 3)) >> ((bit) & 7)) & (0xff >> (UFS_MAXFRAG - uspi->s_fpb)))
	353
c596961d AV	354	static inline u64
c596961d AV	355	ufs_freefrags(struct ufs_sb_private_info *uspi)
ee3ffd6c ED	356	{
ee3ffd6c ED	357	return ufs_blkstofrags(uspi->cs_total.cs_nbfree) +
c596961d	358	uspi->cs_total.cs_nffree;
ee3ffd6c	359	}
1da177e4 LT	360
	361	/*
	362	* Macros to access cylinder group array structures
	363	*/
	364	#define ubh_cg_blktot(ucpi,cylno) \
9695ef16	365	(((__fs32)ubh_get_addr(UCPI_UBH(ucpi), (ucpi)->c_btotoff + ((cylno) << 2))))
1da177e4 LT	366
1da177e4 LT	367	#define ubh_cg_blks(ucpi,cylno,rpos) \
9695ef16	368	(((__fs16)ubh_get_addr(UCPI_UBH(ucpi), \
1da177e4 LT	369	(ucpi)->c_boff + (((cylno) * uspi->s_nrpos + (rpos)) << 1 ))))
	370
	371	/*
	372	* Bitmap operations
	373	* These functions work like classical bitmap operations.
	374	* The difference is that we don't have the whole bitmap
	375	* in one contiguous chunk of memory, but in several buffers.
	376	* The parameters of each function are super_block, ufs_buffer_head and
	377	* position of the beginning of the bitmap.
	378	*/
	379	#define ubh_setbit(ubh,begin,bit) \
	380	(*ubh_get_addr(ubh, (begin) + ((bit) >> 3)) \|= (1 << ((bit) & 7)))
	381
	382	#define ubh_clrbit(ubh,begin,bit) \
	383	(*ubh_get_addr (ubh, (begin) + ((bit) >> 3)) &= ~(1 << ((bit) & 7)))
	384
	385	#define ubh_isset(ubh,begin,bit) \
	386	(*ubh_get_addr (ubh, (begin) + ((bit) >> 3)) & (1 << ((bit) & 7)))
	387
	388	#define ubh_isclr(ubh,begin,bit) (!ubh_isset(ubh,begin,bit))
	389
	390	#define ubh_find_first_zero_bit(ubh,begin,size) _ubh_find_next_zero_bit_(uspi,ubh,begin,size,0)
	391
	392	#define ubh_find_next_zero_bit(ubh,begin,size,offset) _ubh_find_next_zero_bit_(uspi,ubh,begin,size,offset)
	393	static inline unsigned _ubh_find_next_zero_bit_(
	394	struct ufs_sb_private_info * uspi, struct ufs_buffer_head * ubh,
	395	unsigned begin, unsigned size, unsigned offset)
	396	{
	397	unsigned base, count, pos;
	398
	399	size -= offset;
	400	begin <<= 3;
	401	offset += begin;
	402	base = offset >> uspi->s_bpfshift;
	403	offset &= uspi->s_bpfmask;
	404	for (;;) {
	405	count = min_t(unsigned int, size + offset, uspi->s_bpf);
	406	size -= count - offset;
3cdc7125	407	pos = find_next_zero_bit_le(ubh->bh[base]->b_data, count, offset);
1da177e4 LT	408	if (pos < count \|\| !size)
	409	break;
	410	base++;
	411	offset = 0;
	412	}
	413	return (base << uspi->s_bpfshift) + pos - begin;
	414	}
	415
	416	static inline unsigned find_last_zero_bit (unsigned char * bitmap,
	417	unsigned size, unsigned offset)
	418	{
	419	unsigned bit, i;
	420	unsigned char * mapp;
	421	unsigned char map;
	422
	423	mapp = bitmap + (size >> 3);
	424	map = *mapp--;
	425	bit = 1 << (size & 7);
	426	for (i = size; i > offset; i--) {
	427	if ((map & bit) == 0)
	428	break;
	429	if ((i & 7) != 0) {
	430	bit >>= 1;
	431	} else {
	432	map = *mapp--;
	433	bit = 1 << 7;
	434	}
	435	}
	436	return i;
	437	}
	438
	439	#define ubh_find_last_zero_bit(ubh,begin,size,offset) _ubh_find_last_zero_bit_(uspi,ubh,begin,size,offset)
	440	static inline unsigned _ubh_find_last_zero_bit_(
	441	struct ufs_sb_private_info * uspi, struct ufs_buffer_head * ubh,
	442	unsigned begin, unsigned start, unsigned end)
	443	{
	444	unsigned base, count, pos, size;
	445
	446	size = start - end;
	447	begin <<= 3;
	448	start += begin;
	449	base = start >> uspi->s_bpfshift;
	450	start &= uspi->s_bpfmask;
	451	for (;;) {
	452	count = min_t(unsigned int,
	453	size + (uspi->s_bpf - start), uspi->s_bpf)
	454	- (uspi->s_bpf - start);
	455	size -= count;
	456	pos = find_last_zero_bit (ubh->bh[base]->b_data,
	457	start, start - count);
	458	if (pos > start - count \|\| !size)
	459	break;
	460	base--;
	461	start = uspi->s_bpf;
	462	}
	463	return (base << uspi->s_bpfshift) + pos - begin;
	464	}
	465
	466	#define ubh_isblockclear(ubh,begin,block) (!_ubh_isblockset_(uspi,ubh,begin,block))
	467
	468	#define ubh_isblockset(ubh,begin,block) _ubh_isblockset_(uspi,ubh,begin,block)
	469	static inline int _ubh_isblockset_(struct ufs_sb_private_info * uspi,
	470	struct ufs_buffer_head * ubh, unsigned begin, unsigned block)
	471	{
414cf718	472	u8 mask;
1da177e4 LT	473	switch (uspi->s_fpb) {
	474	case 8:
	475	return (*ubh_get_addr (ubh, begin + block) == 0xff);
	476	case 4:
414cf718 AV	477	mask = 0x0f << ((block & 0x01) << 2);
414cf718 AV	478	return (*ubh_get_addr (ubh, begin + (block >> 1)) & mask) == mask;
1da177e4	479	case 2:
414cf718 AV	480	mask = 0x03 << ((block & 0x03) << 1);
414cf718 AV	481	return (*ubh_get_addr (ubh, begin + (block >> 2)) & mask) == mask;
1da177e4	482	case 1:
414cf718 AV	483	mask = 0x01 << (block & 0x07);
414cf718 AV	484	return (*ubh_get_addr (ubh, begin + (block >> 3)) & mask) == mask;
1da177e4 LT	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	}
a3fda0ff AB	593
	594	static inline __fs32 ufs_get_seconds(struct super_block *sbp)
	595	{
	596	time64_t now = ktime_get_real_seconds();
	597
	598	/* Signed 32-bit interpretation wraps around in 2038, which
	599	* happens in ufs1 inode stamps but not ufs2 using 64-bits
	600	* stamps. For superblock and blockgroup, let's assume
	601	* unsigned 32-bit stamps, which are good until y2106.
	602	* Wrap around rather than clamp here to make the dirty
	603	* file system detection work in the superblock stamp.
	604	*/
	605	return cpu_to_fs32(sbp, lower_32_bits(now));
	606	}