[PATCH v4 7/9] fs/ntfs3: Add iocharset= mount option as alias for nls=

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Other fs drivers are using iocharset= mount option for specifying charset.
So add it also for ntfs3 and mark old nls= mount option as deprecated.

Signed-off-by: Kari Argillander <kari.argillander@xxxxxxxxx>
---
 Documentation/filesystems/ntfs3.rst |  4 ++--
 fs/ntfs3/super.c                    | 18 +++++++++++-------
 2 files changed, 13 insertions(+), 9 deletions(-)

diff --git a/Documentation/filesystems/ntfs3.rst b/Documentation/filesystems/ntfs3.rst
index af7158de6fde..ded706474825 100644
--- a/Documentation/filesystems/ntfs3.rst
+++ b/Documentation/filesystems/ntfs3.rst
@@ -32,12 +32,12 @@ generic ones.
 
 ===============================================================================
 
-nls=name		This option informs the driver how to interpret path
+iocharset=name		This option informs the driver how to interpret path
 			strings and translate them to Unicode and back. If
 			this option is not set, the default codepage will be
 			used (CONFIG_NLS_DEFAULT).
 			Examples:
-				'nls=utf8'
+				'iocharset=utf8'
 
 uid=
 gid=
diff --git a/fs/ntfs3/super.c b/fs/ntfs3/super.c
index 729ead6f2fac..503e2e23f711 100644
--- a/fs/ntfs3/super.c
+++ b/fs/ntfs3/super.c
@@ -226,7 +226,7 @@ enum Opt {
 	Opt_nohidden,
 	Opt_showmeta,
 	Opt_acl,
-	Opt_nls,
+	Opt_iocharset,
 	Opt_prealloc,
 	Opt_no_acs_rules,
 	Opt_err,
@@ -245,9 +245,13 @@ static const struct fs_parameter_spec ntfs_fs_parameters[] = {
 	fsparam_flag_no("hidden",		Opt_nohidden),
 	fsparam_flag_no("acl",			Opt_acl),
 	fsparam_flag_no("showmeta",		Opt_showmeta),
-	fsparam_string("nls",			Opt_nls),
 	fsparam_flag_no("prealloc",		Opt_prealloc),
 	fsparam_flag("no_acs_rules",		Opt_no_acs_rules),
+	fsparam_string("iocharset",		Opt_iocharset),
+
+	__fsparam(fs_param_is_string,
+		  "nls", Opt_iocharset,
+		  fs_param_deprecated, NULL),
 	{}
 };
 
@@ -346,7 +350,7 @@ static int ntfs_fs_parse_param(struct fs_context *fc,
 	case Opt_showmeta:
 		opts->showmeta = result.negated ? 0 : 1;
 		break;
-	case Opt_nls:
+	case Opt_iocharset:
 		kfree(opts->nls_name);
 		opts->nls_name = param->string;
 		param->string = NULL;
@@ -380,11 +384,11 @@ static int ntfs_fs_reconfigure(struct fs_context *fc)
 	new_opts->nls = ntfs_load_nls(new_opts->nls_name);
 	if (IS_ERR(new_opts->nls)) {
 		new_opts->nls = NULL;
-		errorf(fc, "ntfs3: Cannot load nls %s", new_opts->nls_name);
+		errorf(fc, "ntfs3: Cannot load iocharset %s", new_opts->nls_name);
 		return -EINVAL;
 	}
 	if (new_opts->nls != sbi->options->nls)
-		return invalf(fc, "ntfs3: Cannot use different nls when remounting!");
+		return invalf(fc, "ntfs3: Cannot use different iocharset when remounting!");
 
 	sync_filesystem(sb);
 
@@ -528,9 +532,9 @@ static int ntfs_show_options(struct seq_file *m, struct dentry *root)
 	if (opts->dmask)
 		seq_printf(m, ",dmask=%04o", ~opts->fs_dmask_inv);
 	if (opts->nls)
-		seq_printf(m, ",nls=%s", opts->nls->charset);
+		seq_printf(m, ",iocharset=%s", opts->nls->charset);
 	else
-		seq_puts(m, ",nls=utf8");
+		seq_puts(m, ",iocharset=utf8");
 	if (opts->sys_immutable)
 		seq_puts(m, ",sys_immutable");
 	if (opts->discard)
-- 
2.25.1




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