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Subject[PATCH v3 1/2] exfat: add keep_last_dots mount option
Date
The "keep_last_dots" mount option will, in a
subsequent commit, control whether or not trailing periods '.' are stripped
from path components during file lookup or file creation.

Suggested-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Vasant Karasulli <vkarasulli@suse.de>
Co-developed-by: David Disseldorp <ddiss@suse.de>
Signed-off-by: David Disseldorp <ddiss@suse.de>
---
fs/exfat/exfat_fs.h | 3 ++-
fs/exfat/super.c | 7 +++++++
2 files changed, 9 insertions(+), 1 deletion(-)

diff --git a/fs/exfat/exfat_fs.h b/fs/exfat/exfat_fs.h
index 619e5b4bed10..c6800b880920 100644
--- a/fs/exfat/exfat_fs.h
+++ b/fs/exfat/exfat_fs.h
@@ -203,7 +203,8 @@ struct exfat_mount_options {
/* on error: continue, panic, remount-ro */
enum exfat_error_mode errors;
unsigned utf8:1, /* Use of UTF-8 character set */
- discard:1; /* Issue discard requests on deletions */
+ discard:1, /* Issue discard requests on deletions */
+ keep_last_dots:1; /* Keep trailing periods in paths */
int time_offset; /* Offset of timestamps from UTC (in minutes) */
};

diff --git a/fs/exfat/super.c b/fs/exfat/super.c
index 8c9fb7dcec16..4c3f80ed17b1 100644
--- a/fs/exfat/super.c
+++ b/fs/exfat/super.c
@@ -174,6 +174,8 @@ static int exfat_show_options(struct seq_file *m, struct dentry *root)
seq_puts(m, ",errors=remount-ro");
if (opts->discard)
seq_puts(m, ",discard");
+ if (opts->keep_last_dots)
+ seq_puts(m, ",keep_last_dots");
if (opts->time_offset)
seq_printf(m, ",time_offset=%d", opts->time_offset);
return 0;
@@ -217,6 +219,7 @@ enum {
Opt_charset,
Opt_errors,
Opt_discard,
+ Opt_keep_last_dots,
Opt_time_offset,

/* Deprecated options */
@@ -243,6 +246,7 @@ static const struct fs_parameter_spec exfat_parameters[] = {
fsparam_string("iocharset", Opt_charset),
fsparam_enum("errors", Opt_errors, exfat_param_enums),
fsparam_flag("discard", Opt_discard),
+ fsparam_flag("keep_last_dots", Opt_keep_last_dots),
fsparam_s32("time_offset", Opt_time_offset),
__fsparam(NULL, "utf8", Opt_utf8, fs_param_deprecated,
NULL),
@@ -297,6 +301,9 @@ static int exfat_parse_param(struct fs_context *fc, struct fs_parameter *param)
case Opt_discard:
opts->discard = 1;
break;
+ case Opt_keep_last_dots:
+ opts->keep_last_dots = 1;
+ break;
case Opt_time_offset:
/*
* Make the limit 24 just in case someone invents something
--
2.32.0
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