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-rw-r--r--fs/ufs/util.h600
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diff --git a/fs/ufs/util.h b/fs/ufs/util.h
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+++ b/fs/ufs/util.h
@@ -0,0 +1,600 @@
+/* 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"
+
+/*
+ * 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));
+}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-02 09:00:02 +0000