592 lines
16 KiB
C
592 lines
16 KiB
C
/*
|
|
* linux/fs/ufs/util.h
|
|
*
|
|
* Copyright (C) 1998
|
|
* Daniel Pirkl <daniel.pirkl@email.cz>
|
|
* 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)))
|
|
|
|
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;
|
|
}
|