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authorChung-Chiang Cheng <cccheng@synology.com>2022-04-06 12:55:52 +0300
committerNamjae Jeon <linkinjeon@kernel.org>2022-05-23 05:17:29 +0300
commit9b002894b4c252169abc26720452bf3746114b20 (patch)
tree079800f257f77d6057d9d4b917159d6754a957eb /fs/exfat/super.c
parentd8dad2588addd1d861ce19e7df3b702330f0c7e3 (diff)
downloadlinux-9b002894b4c252169abc26720452bf3746114b20.tar.xz
exfat: introduce mount option 'sys_tz'
EXFAT_TZ_VALID bit in {create,modify,access}_tz is corresponding to OffsetValid field in exfat specification [1]. When this bit isn't set, timestamps should be treated as having the same UTC offset as the current local time. Currently, there is an option 'time_offset' for users to specify the UTC offset for this issue. This patch introduces a new mount option 'sys_tz' to use system timezone as time offset. Link: [1] https://docs.microsoft.com/en-us/windows/win32/fileio/exfat-specification#74102-offsetvalid-field Signed-off-by: Chung-Chiang Cheng <cccheng@synology.com> Acked-by: Sungjong Seo <sj1557.seo@samsung.com> Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>
Diffstat (limited to 'fs/exfat/super.c')
-rw-r--r--fs/exfat/super.c9
1 files changed, 8 insertions, 1 deletions
diff --git a/fs/exfat/super.c b/fs/exfat/super.c
index 8ca21e7917d1..3e0f67b2103e 100644
--- a/fs/exfat/super.c
+++ b/fs/exfat/super.c
@@ -170,7 +170,9 @@ static int exfat_show_options(struct seq_file *m, struct dentry *root)
seq_puts(m, ",discard");
if (opts->keep_last_dots)
seq_puts(m, ",keep_last_dots");
- if (opts->time_offset)
+ if (opts->sys_tz)
+ seq_puts(m, ",sys_tz");
+ else if (opts->time_offset)
seq_printf(m, ",time_offset=%d", opts->time_offset);
return 0;
}
@@ -214,6 +216,7 @@ enum {
Opt_errors,
Opt_discard,
Opt_keep_last_dots,
+ Opt_sys_tz,
Opt_time_offset,
/* Deprecated options */
@@ -241,6 +244,7 @@ static const struct fs_parameter_spec exfat_parameters[] = {
fsparam_enum("errors", Opt_errors, exfat_param_enums),
fsparam_flag("discard", Opt_discard),
fsparam_flag("keep_last_dots", Opt_keep_last_dots),
+ fsparam_flag("sys_tz", Opt_sys_tz),
fsparam_s32("time_offset", Opt_time_offset),
__fsparam(NULL, "utf8", Opt_utf8, fs_param_deprecated,
NULL),
@@ -298,6 +302,9 @@ static int exfat_parse_param(struct fs_context *fc, struct fs_parameter *param)
case Opt_keep_last_dots:
opts->keep_last_dots = 1;
break;
+ case Opt_sys_tz:
+ opts->sys_tz = 1;
+ break;
case Opt_time_offset:
/*
* Make the limit 24 just in case someone invents something