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1  /*
2   *  linux/fs/ufs/util.h
3   *
4   * Copyright (C) 1998
5   * Daniel Pirkl <daniel.pirkl@email.cz>
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  /*
20   * functions used for retyping
21   */
UCPI_UBH(struct ufs_cg_private_info * cpi)22  static inline struct ufs_buffer_head *UCPI_UBH(struct ufs_cg_private_info *cpi)
23  {
24  	return &cpi->c_ubh;
25  }
USPI_UBH(struct ufs_sb_private_info * spi)26  static inline struct ufs_buffer_head *USPI_UBH(struct ufs_sb_private_info *spi)
27  {
28  	return &spi->s_ubh;
29  }
30  
31  
32  
33  /*
34   * macros used for accessing structures
35   */
36  static inline s32
ufs_get_fs_state(struct super_block * sb,struct ufs_super_block_first * usb1,struct ufs_super_block_third * usb3)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) {
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 */
45  	case UFS_ST_SUN:
46  		return fs32_to_cpu(sb, usb3->fs_un2.fs_sun.fs_state);
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:
51  		return fs32_to_cpu(sb, usb3->fs_un2.fs_44.fs_state);
52  	}
53  }
54  
55  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)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) {
60  	case UFS_ST_SUNOS:
61  		if (fs32_to_cpu(sb, usb3->fs_postblformat) == UFS_42POSTBLFMT) {
62  			usb1->fs_u0.fs_sun.fs_state = cpu_to_fs32(sb, value);
63  			break;
64  		}
65  		/* Fall Through to UFS_ST_SUN */
66  	case UFS_ST_SUN:
67  		usb3->fs_un2.fs_sun.fs_state = cpu_to_fs32(sb, value);
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:
73  		usb3->fs_un2.fs_44.fs_state = cpu_to_fs32(sb, value);
74  		break;
75  	}
76  }
77  
78  static inline u32
ufs_get_fs_npsect(struct super_block * sb,struct ufs_super_block_first * usb1,struct ufs_super_block_third * usb3)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)
83  		return fs32_to_cpu(sb, usb3->fs_un2.fs_sunx86.fs_npsect);
84  	else
85  		return fs32_to_cpu(sb, usb1->fs_u1.fs_sun.fs_npsect);
86  }
87  
88  static inline u64
ufs_get_fs_qbmask(struct super_block * sb,struct ufs_super_block_third * usb3)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) {
94  	case UFS_ST_SUNOS:
95  	case UFS_ST_SUN:
96  		((__fs32 *)&tmp)[0] = usb3->fs_un2.fs_sun.fs_qbmask[0];
97  		((__fs32 *)&tmp)[1] = usb3->fs_un2.fs_sun.fs_qbmask[1];
98  		break;
99  	case UFS_ST_SUNx86:
100  		((__fs32 *)&tmp)[0] = usb3->fs_un2.fs_sunx86.fs_qbmask[0];
101  		((__fs32 *)&tmp)[1] = usb3->fs_un2.fs_sunx86.fs_qbmask[1];
102  		break;
103  	case UFS_ST_44BSD:
104  		((__fs32 *)&tmp)[0] = usb3->fs_un2.fs_44.fs_qbmask[0];
105  		((__fs32 *)&tmp)[1] = usb3->fs_un2.fs_44.fs_qbmask[1];
106  		break;
107  	}
108  
109  	return fs64_to_cpu(sb, tmp);
110  }
111  
112  static inline u64
ufs_get_fs_qfmask(struct super_block * sb,struct ufs_super_block_third * usb3)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) {
118  	case UFS_ST_SUNOS:
119  	case UFS_ST_SUN:
120  		((__fs32 *)&tmp)[0] = usb3->fs_un2.fs_sun.fs_qfmask[0];
121  		((__fs32 *)&tmp)[1] = usb3->fs_un2.fs_sun.fs_qfmask[1];
122  		break;
123  	case UFS_ST_SUNx86:
124  		((__fs32 *)&tmp)[0] = usb3->fs_un2.fs_sunx86.fs_qfmask[0];
125  		((__fs32 *)&tmp)[1] = usb3->fs_un2.fs_sunx86.fs_qfmask[1];
126  		break;
127  	case UFS_ST_44BSD:
128  		((__fs32 *)&tmp)[0] = usb3->fs_un2.fs_44.fs_qfmask[0];
129  		((__fs32 *)&tmp)[1] = usb3->fs_un2.fs_44.fs_qfmask[1];
130  		break;
131  	}
132  
133  	return fs64_to_cpu(sb, tmp);
134  }
135  
136  static inline u16
ufs_get_de_namlen(struct super_block * sb,struct ufs_dir_entry * de)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
ufs_set_de_namlen(struct super_block * sb,struct ufs_dir_entry * de,u16 value)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
ufs_set_de_type(struct super_block * sb,struct ufs_dir_entry * de,int mode)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
ufs_get_inode_uid(struct super_block * sb,struct ufs_inode * inode)191  ufs_get_inode_uid(struct super_block *sb, struct ufs_inode *inode)
192  {
193  	switch (UFS_SB(sb)->s_flags & UFS_UID_MASK) {
194  	case UFS_UID_44BSD:
195  		return fs32_to_cpu(sb, inode->ui_u3.ui_44.ui_uid);
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 */
200  	default:
201  		return fs16_to_cpu(sb, inode->ui_u1.oldids.ui_suid);
202  	}
203  }
204  
205  static inline void
ufs_set_inode_uid(struct super_block * sb,struct ufs_inode * inode,u32 value)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) {
209  	case UFS_UID_44BSD:
210  		inode->ui_u3.ui_44.ui_uid = cpu_to_fs32(sb, value);
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);
220  		break;
221  	}
222  }
223  
224  static inline u32
ufs_get_inode_gid(struct super_block * sb,struct ufs_inode * inode)225  ufs_get_inode_gid(struct super_block *sb, struct ufs_inode *inode)
226  {
227  	switch (UFS_SB(sb)->s_flags & UFS_UID_MASK) {
228  	case UFS_UID_44BSD:
229  		return fs32_to_cpu(sb, inode->ui_u3.ui_44.ui_gid);
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 */
234  	default:
235  		return fs16_to_cpu(sb, inode->ui_u1.oldids.ui_sgid);
236  	}
237  }
238  
239  static inline void
ufs_set_inode_gid(struct super_block * sb,struct ufs_inode * inode,u32 value)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) {
243  	case UFS_UID_44BSD:
244  		inode->ui_u3.ui_44.ui_gid = cpu_to_fs32(sb, value);
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);
254  		break;
255  	}
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);
260  extern int ufs_prepare_chunk(struct page *page, loff_t pos, unsigned len);
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);
272  extern void ubh_sync_block(struct ufs_buffer_head *);
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  
280  /* This functions works with cache pages*/
281  extern struct page *ufs_get_locked_page(struct address_space *mapping,
282  					pgoff_t index);
ufs_put_locked_page(struct page * page)283  static inline void ufs_put_locked_page(struct page *page)
284  {
285         unlock_page(page);
286         page_cache_release(page);
287  }
288  
289  
290  /*
291   * macros and inline function to get important structures from ufs_sb_private_info
292   */
293  
get_usb_offset(struct ufs_sb_private_info * uspi,unsigned int offset)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), 2*UFS_SECTOR_SIZE))
312  
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)) + \
328  	((begin) & ((uspi->fsize>>1) - 1)))
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  
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  
338  #define ubh_get_addr ubh_get_addr8
339  
ubh_get_data_ptr(struct ufs_sb_private_info * uspi,struct ufs_buffer_head * ubh,u64 blk)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  
350  #define ubh_blkmap(ubh,begin,bit) \
351  	((*ubh_get_addr(ubh, (begin) + ((bit) >> 3)) >> ((bit) & 7)) & (0xff >> (UFS_MAXFRAG - uspi->s_fpb)))
352  
353  /*
354   * Determine the number of available frags given a
355   * percentage to hold in reserve.
356   */
357  static inline u64
ufs_freespace(struct ufs_sb_private_info * uspi,int percentreserved)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  }
364  
365  /*
366   * Macros to access cylinder group array structures
367   */
368  #define ubh_cg_blktot(ucpi,cylno) \
369  	(*((__fs32*)ubh_get_addr(UCPI_UBH(ucpi), (ucpi)->c_btotoff + ((cylno) << 2))))
370  
371  #define ubh_cg_blks(ucpi,cylno,rpos) \
372  	(*((__fs16*)ubh_get_addr(UCPI_UBH(ucpi), \
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)
_ubh_find_next_zero_bit_(struct ufs_sb_private_info * uspi,struct ufs_buffer_head * ubh,unsigned begin,unsigned size,unsigned 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;
411  		pos = find_next_zero_bit_le(ubh->bh[base]->b_data, count, offset);
412  		if (pos < count || !size)
413  			break;
414  		base++;
415  		offset = 0;
416  	}
417  	return (base << uspi->s_bpfshift) + pos - begin;
418  }
419  
find_last_zero_bit(unsigned char * bitmap,unsigned size,unsigned offset)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)
_ubh_find_last_zero_bit_(struct ufs_sb_private_info * uspi,struct ufs_buffer_head * ubh,unsigned begin,unsigned start,unsigned end)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)
_ubh_isblockset_(struct ufs_sb_private_info * uspi,struct ufs_buffer_head * ubh,unsigned begin,unsigned 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)
_ubh_clrblock_(struct ufs_sb_private_info * uspi,struct ufs_buffer_head * ubh,unsigned begin,unsigned 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)
_ubh_setblock_(struct ufs_sb_private_info * uspi,struct ufs_buffer_head * ubh,unsigned begin,unsigned 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  
ufs_fragacct(struct super_block * sb,unsigned blockmap,__fs32 * fraglist,int cnt)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  }
550  
ufs_get_direct_data_ptr(struct ufs_sb_private_info * uspi,struct ufs_inode_info * ufsi,unsigned blk)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  
ufs_data_ptr_to_cpu(struct super_block * sb,void * p)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  
ufs_cpu_to_data_ptr(struct super_block * sb,void * p,u64 val)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  
ufs_data_ptr_clear(struct ufs_sb_private_info * uspi,void * p)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  
ufs_is_data_ptr_zero(struct ufs_sb_private_info * uspi,void * p)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  }
593