Merge tag 'exfat-for-5.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/linkinjeon/exfat

Pull exfat updates from Namjae Jeon:

 - Add keep_last_dots mount option to allow access to paths with
   trailing dots

 - Avoid repetitive volume dirty bit set/clear to improve storage life
   time

* tag 'exfat-for-5.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/linkinjeon/exfat:
  exfat: do not clear VolumeDirty in writeback
  exfat: allow access to paths with trailing dots

1 files changed, 9 insertions, 8 deletions

diff --git a/fs/exfat/super.c b/fs/exfat/super.c
index 9f892903419a..8ca21e7917d1 100644
--- a/fs/exfat/super.c
+++ b/fs/exfat/super.c
@@ -100,7 +100,6 @@ static int exfat_set_vol_flags(struct super_block *sb, unsigned short new_flags)
 {
 	struct exfat_sb_info *sbi = EXFAT_SB(sb);
 	struct boot_sector *p_boot = (struct boot_sector *)sbi->boot_bh->b_data;
-	bool sync;
 
 	/* retain persistent-flags */
 	new_flags |= sbi->vol_flags_persistent;
@@ -119,16 +118,11 @@ static int exfat_set_vol_flags(struct super_block *sb, unsigned short new_flags)
 
 	p_boot->vol_flags = cpu_to_le16(new_flags);
 
-	if ((new_flags & VOLUME_DIRTY) && !buffer_dirty(sbi->boot_bh))
-		sync = true;
-	else
-		sync = false;
-
 	set_buffer_uptodate(sbi->boot_bh);
 	mark_buffer_dirty(sbi->boot_bh);
 
-	if (sync)
-		sync_dirty_buffer(sbi->boot_bh);
+	__sync_dirty_buffer(sbi->boot_bh, REQ_SYNC | REQ_FUA | REQ_PREFLUSH);
+
 	return 0;
 }
 
@@ -174,6 +168,8 @@ 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 +213,7 @@ enum {
 	Opt_charset,
 	Opt_errors,
 	Opt_discard,
+	Opt_keep_last_dots,
 	Opt_time_offset,
 
 	/* Deprecated options */
@@ -243,6 +240,7 @@ 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 +295,9 @@ 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