staging: exfat: remove symlink feature

Completely remove symlink codes and definitions.
In the previous patch, it was not completely removed.
Reviewed-by: Takahiro Mori <Mori.Takahiro@ab.MitsubishiElectric.co.jp>
Signed-off-by: Tetsuhiro Kohada <Kohada.Tetsuhiro@dc.MitsubishiElectric.co.jp>
Link: https://lore.kernel.org/r/20200227061559.4481-1-Kohada.Tetsuhiro@dc.MitsubishiElectric.co.jpSigned-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/exfat/exfat.h

@@ -63,7 +63,6 @@
 #define TYPE_VOLUME		0x0103
 #define TYPE_DIR		0x0104
 #define TYPE_FILE		0x011F
-#define TYPE_SYMLINK		0x015F
 #define TYPE_CRITICAL_SEC	0x0200
 #define TYPE_STREAM		0x0201
 #define TYPE_EXTEND		0x0202
@@ -198,13 +197,11 @@ static inline u16 get_row_index(u16 i)
 #define ATTR_VOLUME		0x0008
 #define ATTR_SUBDIR		0x0010
 #define ATTR_ARCHIVE		0x0020
-#define ATTR_SYMLINK		0x0040
 #define ATTR_EXTEND		0x000F
 #define ATTR_RWMASK		0x007E
 
 /* file creation modes */
 #define FM_REGULAR              0x00
-#define FM_SYMLINK              0x40
 
 #define NUM_UPCASE              2918
 

drivers/staging/exfat/exfat_core.c

@@ -844,9 +844,6 @@ static void exfat_set_entry_type(struct dentry_t *p_entry, u32 type)
 	} else if (type == TYPE_FILE) {
 		ep->type = 0x85;
 		SET16_A(ep->attr, ATTR_ARCHIVE);
-	} else if (type == TYPE_SYMLINK) {
-		ep->type = 0x85;
-		SET16_A(ep->attr, ATTR_ARCHIVE | ATTR_SYMLINK);
 	}
 }
 

drivers/staging/exfat/exfat_super.c

@@ -320,8 +320,6 @@ static inline mode_t exfat_make_mode(struct exfat_sb_info *sbi, u32 attr,
 
 	if (attr & ATTR_SUBDIR)
 		return (mode & ~sbi->options.fs_dmask) | S_IFDIR;
-	else if (attr & ATTR_SYMLINK)
-		return (mode & ~sbi->options.fs_dmask) | S_IFLNK;
 	else
 		return (mode & ~sbi->options.fs_fmask) | S_IFREG;
 }
@@ -2399,24 +2397,6 @@ static const struct inode_operations exfat_dir_inode_operations = {
 /*======================================================================*/
 /*  File Operations                                                     */
 /*======================================================================*/
-static const char *exfat_get_link(struct dentry *dentry, struct inode *inode,
-				  struct delayed_call *done)
-{
-	struct exfat_inode_info *ei = EXFAT_I(inode);
-
-	if (ei->target) {
-		char *cookie = ei->target;
-
-		if (cookie)
-			return (char *)(ei->target);
-	}
-	return NULL;
-}
-
-static const struct inode_operations exfat_symlink_inode_operations = {
-		.get_link = exfat_get_link,
-};
-
 static int exfat_file_release(struct inode *inode, struct file *filp)
 {
 	struct super_block *sb = inode->i_sb;
@@ -2688,13 +2668,6 @@ static int exfat_fill_inode(struct inode *inode, struct file_id_t *fid)
 		i_size_write(inode, info.Size);
 		EXFAT_I(inode)->mmu_private = i_size_read(inode);
 		set_nlink(inode, info.num_subdirs);
-	} else if (info.attr & ATTR_SYMLINK) { /* symbolic link */
-		inode->i_generation |= 1;
-		inode->i_mode = exfat_make_mode(sbi, info.attr, 0777);
-		inode->i_op = &exfat_symlink_inode_operations;
-
-		i_size_write(inode, info.Size);
-		EXFAT_I(inode)->mmu_private = i_size_read(inode);
 	} else { /* regular file */
 		inode->i_generation |= 1;
 		inode->i_mode = exfat_make_mode(sbi, info.attr, 0777);