[PATCH 5/5] cifs: Remove unicode parameter from parse_reparse_point() function

["Pali Rohár" <pali@kernel.org>]

This parameter is always true, so remove it and also remove dead code which
is never called (for all false code paths).

Signed-off-by: Pali Rohár <pali@kernel.org>
---
 fs/smb/client/cifsproto.h |  2 +-
 fs/smb/client/reparse.c   | 25 +++++++++++--------------
 fs/smb/client/smb1ops.c   |  2 +-
 fs/smb/client/smb2file.c  |  1 -
 fs/smb/client/smb2proto.h |  2 +-
 5 files changed, 14 insertions(+), 18 deletions(-)

diff --git a/fs/smb/client/cifsproto.h b/fs/smb/client/cifsproto.h
index a7906c193647..31445d40f179 100644
--- a/fs/smb/client/cifsproto.h
+++ b/fs/smb/client/cifsproto.h
@@ -667,7 +667,7 @@ char *extract_sharename(const char *unc);
 int parse_reparse_point(struct reparse_data_buffer *buf,
 			u32 plen, struct cifs_sb_info *cifs_sb,
 			const char *full_path,
-			bool unicode, struct cifs_open_info_data *data);
+			struct cifs_open_info_data *data);
 int __cifs_sfu_make_node(unsigned int xid, struct inode *inode,
 			 struct dentry *dentry, struct cifs_tcon *tcon,
 			 const char *full_path, umode_t mode, dev_t dev,
diff --git a/fs/smb/client/reparse.c b/fs/smb/client/reparse.c
index 3de91331c96c..50720142813e 100644
--- a/fs/smb/client/reparse.c
+++ b/fs/smb/client/reparse.c
@@ -775,7 +775,7 @@ static int parse_reparse_posix(struct reparse_posix_data *buf,
 }
 
 int smb2_parse_native_symlink(char **target, const char *buf, unsigned int len,
-			      bool unicode, bool relative,
+			      bool relative,
 			      const char *full_path,
 			      struct cifs_sb_info *cifs_sb)
 {
@@ -789,26 +789,24 @@ int smb2_parse_native_symlink(char **target, const char *buf, unsigned int len,
 	int rc;
 	int i;
 
-	/* Check that length it valid for unicode/non-unicode mode */
-	if (!len || (unicode && (len % 2))) {
+	/* Check that length it valid */
+	if (!len || (len % 2)) {
 		cifs_dbg(VFS, "srv returned malformed symlink buffer\n");
 		rc = -EIO;
 		goto out;
 	}
 
 	/*
-	 * Check that buffer does not contain UTF-16 null codepoint in unicode
-	 * mode or null byte in non-unicode mode because Linux cannot process
-	 * symlink with null byte.
+	 * Check that buffer does not contain UTF-16 null codepoint
+	 * because Linux cannot process symlink with null byte.
 	 */
-	if ((unicode && UniStrnlen((wchar_t *)buf, len/2) != len/2) ||
-	    (!unicode && strnlen(buf, len) != len)) {
+	if (UniStrnlen((wchar_t *)buf, len/2) != len/2) {
 		cifs_dbg(VFS, "srv returned null byte in native symlink target location\n");
 		rc = -EIO;
 		goto out;
 	}
 
-	smb_target = cifs_strndup_from_utf16(buf, len, unicode, cifs_sb->local_nls);
+	smb_target = cifs_strndup_from_utf16(buf, len, true, cifs_sb->local_nls);
 	if (!smb_target) {
 		rc = -ENOMEM;
 		goto out;
@@ -985,7 +983,7 @@ int smb2_parse_native_symlink(char **target, const char *buf, unsigned int len,
 }
 
 static int parse_reparse_native_symlink(struct reparse_symlink_data_buffer *sym,
-				 u32 plen, bool unicode,
+				 u32 plen,
 				 struct cifs_sb_info *cifs_sb,
 				 const char *full_path,
 				 struct cifs_open_info_data *data)
@@ -1005,7 +1003,6 @@ static int parse_reparse_native_symlink(struct reparse_symlink_data_buffer *sym,
 	return smb2_parse_native_symlink(&data->symlink_target,
 					 sym->PathBuffer + offs,
 					 len,
-					 unicode,
 					 le32_to_cpu(sym->Flags) & SYMLINK_FLAG_RELATIVE,
 					 full_path,
 					 cifs_sb);
@@ -1060,7 +1057,7 @@ static int parse_reparse_wsl_symlink(struct reparse_wsl_symlink_data_buffer *buf
 int parse_reparse_point(struct reparse_data_buffer *buf,
 			u32 plen, struct cifs_sb_info *cifs_sb,
 			const char *full_path,
-			bool unicode, struct cifs_open_info_data *data)
+			struct cifs_open_info_data *data)
 {
 	struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
 
@@ -1074,7 +1071,7 @@ int parse_reparse_point(struct reparse_data_buffer *buf,
 	case IO_REPARSE_TAG_SYMLINK:
 		return parse_reparse_native_symlink(
 			(struct reparse_symlink_data_buffer *)buf,
-			plen, unicode, cifs_sb, full_path, data);
+			plen, cifs_sb, full_path, data);
 	case IO_REPARSE_TAG_LX_SYMLINK:
 		return parse_reparse_wsl_symlink(
 			(struct reparse_wsl_symlink_data_buffer *)buf,
@@ -1108,7 +1105,7 @@ int smb2_parse_reparse_point(struct cifs_sb_info *cifs_sb,
 
 	buf = (struct reparse_data_buffer *)((u8 *)io +
 					     le32_to_cpu(io->OutputOffset));
-	return parse_reparse_point(buf, plen, cifs_sb, full_path, true, data);
+	return parse_reparse_point(buf, plen, cifs_sb, full_path, data);
 }
 
 static void wsl_to_fattr(struct cifs_open_info_data *data,
diff --git a/fs/smb/client/smb1ops.c b/fs/smb/client/smb1ops.c
index f552951cfc04..3667fb94cbf5 100644
--- a/fs/smb/client/smb1ops.c
+++ b/fs/smb/client/smb1ops.c
@@ -1004,7 +1004,7 @@ static int cifs_parse_reparse_point(struct cifs_sb_info *cifs_sb,
 
 	buf = (struct reparse_data_buffer *)((__u8 *)&io->hdr.Protocol +
 					     le32_to_cpu(io->DataOffset));
-	return parse_reparse_point(buf, plen, cifs_sb, full_path, true, data);
+	return parse_reparse_point(buf, plen, cifs_sb, full_path, data);
 }
 
 static bool
diff --git a/fs/smb/client/smb2file.c b/fs/smb/client/smb2file.c
index 91b8d00fb88e..b0037058e8d9 100644
--- a/fs/smb/client/smb2file.c
+++ b/fs/smb/client/smb2file.c
@@ -132,7 +132,6 @@ int smb2_parse_symlink_response(struct cifs_sb_info *cifs_sb, const struct kvec
 	return smb2_parse_native_symlink(path,
 					 (char *)sym->PathBuffer + sub_offs,
 					 sub_len,
-					 true,
 					 le32_to_cpu(sym->Flags) & SYMLINK_FLAG_RELATIVE,
 					 full_path,
 					 cifs_sb);
diff --git a/fs/smb/client/smb2proto.h b/fs/smb/client/smb2proto.h
index 5390d5a61039..c62493c0afc7 100644
--- a/fs/smb/client/smb2proto.h
+++ b/fs/smb/client/smb2proto.h
@@ -115,7 +115,7 @@ extern int smb3_query_mf_symlink(unsigned int xid, struct cifs_tcon *tcon,
 			  unsigned int *pbytes_read);
 int smb2_fix_symlink_target_type(char **target, bool directory, struct cifs_sb_info *cifs_sb);
 int smb2_parse_native_symlink(char **target, const char *buf, unsigned int len,
-			      bool unicode, bool relative,
+			      bool relative,
 			      const char *full_path,
 			      struct cifs_sb_info *cifs_sb);
 int smb2_parse_symlink_response(struct cifs_sb_info *cifs_sb,
-- 
2.20.1