aboutsummaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
Diffstat
-rw-r--r--fs/fat/dir.c2
-rw-r--r--fs/fat/inode.c27
-rw-r--r--fs/fat/misc.c10
-rw-r--r--fs/msdos/namei.c3
-rw-r--r--fs/vfat/namei.c2
-rw-r--r--include/linux/msdos_fs.h8
6 files changed, 35 insertions, 17 deletions
diff --git a/fs/fat/dir.c b/fs/fat/dir.c
index 4c35477bc94c..cd4a0162e10d 100644
--- a/fs/fat/dir.c
+++ b/fs/fat/dir.c
@@ -1101,7 +1101,7 @@ int fat_alloc_new_dir(struct inode *dir, struct timespec *ts)
goto error_free;
}
- fat_date_unix2dos(ts->tv_sec, &time, &date);
+ fat_date_unix2dos(ts->tv_sec, &time, &date, sbi->options.tz_utc);
de = (struct msdos_dir_entry *)bhs[0]->b_data;
/* filling the new directory slots ("." and ".." entries) */
diff --git a/fs/fat/inode.c b/fs/fat/inode.c
index 60deb5fd1188..23676f9d79ce 100644
--- a/fs/fat/inode.c
+++ b/fs/fat/inode.c
@@ -382,17 +382,20 @@ static int fat_fill_inode(struct inode *inode, struct msdos_dir_entry *de)
inode->i_blocks = ((inode->i_size + (sbi->cluster_size - 1))
& ~((loff_t)sbi->cluster_size - 1)) >> 9;
inode->i_mtime.tv_sec =
- date_dos2unix(le16_to_cpu(de->time), le16_to_cpu(de->date));
+ date_dos2unix(le16_to_cpu(de->time), le16_to_cpu(de->date),
+ sbi->options.tz_utc);
inode->i_mtime.tv_nsec = 0;
if (sbi->options.isvfat) {
int secs = de->ctime_cs / 100;
int csecs = de->ctime_cs % 100;
inode->i_ctime.tv_sec =
date_dos2unix(le16_to_cpu(de->ctime),
- le16_to_cpu(de->cdate)) + secs;
+ le16_to_cpu(de->cdate),
+ sbi->options.tz_utc) + secs;
inode->i_ctime.tv_nsec = csecs * 10000000;
inode->i_atime.tv_sec =
- date_dos2unix(0, le16_to_cpu(de->adate));
+ date_dos2unix(0, le16_to_cpu(de->adate),
+ sbi->options.tz_utc);
inode->i_atime.tv_nsec = 0;
} else
inode->i_ctime = inode->i_atime = inode->i_mtime;
@@ -591,11 +594,14 @@ retry:
raw_entry->attr = fat_attr(inode);
raw_entry->start = cpu_to_le16(MSDOS_I(inode)->i_logstart);
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);
+ fat_date_unix2dos(inode->i_mtime.tv_sec, &raw_entry->time,
+ &raw_entry->date, sbi->options.tz_utc);
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);
+ fat_date_unix2dos(inode->i_ctime.tv_sec, &raw_entry->ctime,
+ &raw_entry->cdate, sbi->options.tz_utc);
+ fat_date_unix2dos(inode->i_atime.tv_sec, &atime,
+ &raw_entry->adate, sbi->options.tz_utc);
raw_entry->ctime_cs = (inode->i_ctime.tv_sec & 1) * 100 +
inode->i_ctime.tv_nsec / 10000000;
}
@@ -836,6 +842,8 @@ static int fat_show_options(struct seq_file *m, struct vfsmount *mnt)
}
if (sbi->options.flush)
seq_puts(m, ",flush");
+ if (opts->tz_utc)
+ seq_puts(m, ",tz=UTC");
return 0;
}
@@ -848,7 +856,7 @@ enum {
Opt_charset, Opt_shortname_lower, Opt_shortname_win95,
Opt_shortname_winnt, Opt_shortname_mixed, Opt_utf8_no, Opt_utf8_yes,
Opt_uni_xl_no, Opt_uni_xl_yes, Opt_nonumtail_no, Opt_nonumtail_yes,
- Opt_obsolate, Opt_flush, Opt_err,
+ Opt_obsolate, Opt_flush, Opt_tz_utc, Opt_err,
};
static match_table_t fat_tokens = {
@@ -883,6 +891,7 @@ static match_table_t fat_tokens = {
{Opt_obsolate, "cvf_options=%100s"},
{Opt_obsolate, "posix"},
{Opt_flush, "flush"},
+ {Opt_tz_utc, "tz=UTC"},
{Opt_err, NULL},
};
static match_table_t msdos_tokens = {
@@ -947,6 +956,7 @@ static int parse_options(char *options, int is_vfat, int silent, int *debug,
opts->utf8 = opts->unicode_xlate = 0;
opts->numtail = 1;
opts->usefree = opts->nocase = 0;
+ opts->tz_utc = 0;
*debug = 0;
if (!options)
@@ -1036,6 +1046,9 @@ static int parse_options(char *options, int is_vfat, int silent, int *debug,
case Opt_flush:
opts->flush = 1;
break;
+ case Opt_tz_utc:
+ opts->tz_utc = 1;
+ break;
/* msdos specific */
case Opt_dots:
diff --git a/fs/fat/misc.c b/fs/fat/misc.c
index 61f23511eacf..79fb98ad36d4 100644
--- a/fs/fat/misc.c
+++ b/fs/fat/misc.c
@@ -142,7 +142,7 @@ static int day_n[] = {
};
/* Convert a MS-DOS time/date pair to a UNIX date (seconds since 1 1 70). */
-int date_dos2unix(unsigned short time, unsigned short date)
+int date_dos2unix(unsigned short time, unsigned short date, int tz_utc)
{
int month, year, secs;
@@ -156,16 +156,18 @@ int date_dos2unix(unsigned short time, unsigned short date)
((date & 31)-1+day_n[month]+(year/4)+year*365-((year & 3) == 0 &&
month < 2 ? 1 : 0)+3653);
/* days since 1.1.70 plus 80's leap day */
- secs += sys_tz.tz_minuteswest*60;
+ if (!tz_utc)
+ secs += sys_tz.tz_minuteswest*60;
return secs;
}
/* Convert linear UNIX date to a MS-DOS time/date pair. */
-void fat_date_unix2dos(int unix_date, __le16 *time, __le16 *date)
+void fat_date_unix2dos(int unix_date, __le16 *time, __le16 *date, int tz_utc)
{
int day, year, nl_day, month;
- unix_date -= sys_tz.tz_minuteswest*60;
+ if (!tz_utc)
+ unix_date -= sys_tz.tz_minuteswest*60;
/* Jan 1 GMT 00:00:00 1980. But what about another time zone? */
if (unix_date < 315532800)
diff --git a/fs/msdos/namei.c b/fs/msdos/namei.c
index e4ad6c6b753e..e844b9809d27 100644
--- a/fs/msdos/namei.c
+++ b/fs/msdos/namei.c
@@ -237,6 +237,7 @@ static int msdos_add_entry(struct inode *dir, const unsigned char *name,
int is_dir, int is_hid, int cluster,
struct timespec *ts, struct fat_slot_info *sinfo)
{
+ struct msdos_sb_info *sbi = MSDOS_SB(dir->i_sb);
struct msdos_dir_entry de;
__le16 time, date;
int err;
@@ -246,7 +247,7 @@ static int msdos_add_entry(struct inode *dir, const unsigned char *name,
if (is_hid)
de.attr |= ATTR_HIDDEN;
de.lcase = 0;
- fat_date_unix2dos(ts->tv_sec, &time, &date);
+ fat_date_unix2dos(ts->tv_sec, &time, &date, sbi->options.tz_utc);
de.cdate = de.adate = 0;
de.ctime = 0;
de.ctime_cs = 0;
diff --git a/fs/vfat/namei.c b/fs/vfat/namei.c
index b546ba69be82..155c10b4adbd 100644
--- a/fs/vfat/namei.c
+++ b/fs/vfat/namei.c
@@ -621,7 +621,7 @@ shortname:
memcpy(de->name, msdos_name, MSDOS_NAME);
de->attr = is_dir ? ATTR_DIR : ATTR_ARCH;
de->lcase = lcase;
- fat_date_unix2dos(ts->tv_sec, &time, &date);
+ fat_date_unix2dos(ts->tv_sec, &time, &date, sbi->options.tz_utc);
de->time = de->ctime = time;
de->date = de->cdate = de->adate = date;
de->ctime_cs = 0;
diff --git a/include/linux/msdos_fs.h b/include/linux/msdos_fs.h
index 3346c9c8f17a..ba63858056c7 100644
--- a/include/linux/msdos_fs.h
+++ b/include/linux/msdos_fs.h
@@ -203,7 +203,8 @@ struct fat_mount_options {
numtail:1, /* Does first alias have a numeric '~1' type tail? */
flush:1, /* write things quickly */
nocase:1, /* Does this need case conversion? 0=need case conversion*/
- usefree:1; /* Use free_clusters for FAT32 */
+ usefree:1, /* Use free_clusters for FAT32 */
+ tz_utc:1; /* Filesystem timestamps are in UTC */
};
#define FAT_HASH_BITS 8
@@ -434,8 +435,9 @@ extern int fat_flush_inodes(struct super_block *sb, struct inode *i1,
extern void fat_fs_panic(struct super_block *s, const char *fmt, ...);
extern void fat_clusters_flush(struct super_block *sb);
extern int fat_chain_add(struct inode *inode, int new_dclus, int nr_cluster);
-extern int date_dos2unix(unsigned short time, unsigned short date);
-extern void fat_date_unix2dos(int unix_date, __le16 *time, __le16 *date);
+extern int date_dos2unix(unsigned short time, unsigned short date, int tz_utc);
+extern void fat_date_unix2dos(int unix_date, __le16 *time, __le16 *date,
+ int tz_utc);
extern int fat_sync_bhs(struct buffer_head **bhs, int nr_bhs);
int fat_cache_init(void);
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.