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[PATCH] fat: fix adate 

During a forensic analysis on the fat file system, I found than the result for
the last access date on this file system was different between the stat
command and the istat command (package tct-utils).

The istat command display a true date (the right windows date) but the stat
primitive (so stat, find, ls command) displays a wrong date.

Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Stephane Kardas 2005-09-21 09:55:45 -07:00 committed by Linus Torvalds
parent 89d7cbf73e
commit 62a36c43c8
1 changed files with 8 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
fs/fat/inode.c
View File

@ -300,9 +300,9 @@ static int fat_fill_inode(struct inode *inode, struct msdos_dir_entry *de)
inode->i_blksize = sbi->cluster_size;
inode->i_blocks = ((inode->i_size + (sbi->cluster_size - 1))
& ~((loff_t)sbi->cluster_size - 1)) >> 9;
inode->i_mtime.tv_sec = inode->i_atime.tv_sec =
inode->i_mtime.tv_sec =
date_dos2unix(le16_to_cpu(de->time), le16_to_cpu(de->date));
inode->i_mtime.tv_nsec = inode->i_atime.tv_nsec = 0;
inode->i_mtime.tv_nsec = 0;
if (sbi->options.isvfat) {
int secs = de->ctime_cs / 100;
int csecs = de->ctime_cs % 100;
@ -310,8 +310,11 @@ static int fat_fill_inode(struct inode *inode, struct msdos_dir_entry *de)
date_dos2unix(le16_to_cpu(de->ctime),
le16_to_cpu(de->cdate)) + secs;
inode->i_ctime.tv_nsec = csecs * 10000000;
inode->i_atime.tv_sec =
date_dos2unix(le16_to_cpu(0), le16_to_cpu(de->adate));
inode->i_atime.tv_nsec = 0;
} else
inode->i_ctime = inode->i_mtime;
inode->i_ctime = inode->i_atime = inode->i_mtime;
return 0;
}
@ -513,7 +516,9 @@ retry:
raw_entry->starthi = cpu_to_le16(MSDOS_I(inode)->i_logstart >> 16);
fat_date_unix2dos(inode->i_mtime.tv_sec, &raw_entry->time, &raw_entry->date);
if (sbi->options.isvfat) {
__le16 atime;
fat_date_unix2dos(inode->i_ctime.tv_sec,&raw_entry->ctime,&raw_entry->cdate);
fat_date_unix2dos(inode->i_atime.tv_sec,&atime,&raw_entry->adate);
raw_entry->ctime_cs = (inode->i_ctime.tv_sec & 1) * 100 +
inode->i_ctime.tv_nsec / 10000000;
}