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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
commit | 2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch) | |
tree | 848558de17fb3008cdf4d861b01ac7781903ce39 /fs/ufs/util.h | |
parent | Initial commit. (diff) | |
download | linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip |
Adding upstream version 6.1.76.upstream/6.1.76upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'fs/ufs/util.h')
-rw-r--r-- | fs/ufs/util.h | 606 |
1 files changed, 606 insertions, 0 deletions
diff --git a/fs/ufs/util.h b/fs/ufs/util.h new file mode 100644 index 000000000..4931bec1a --- /dev/null +++ b/fs/ufs/util.h @@ -0,0 +1,606 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * 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); + 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)); +} |