From: Al Viro <viro@zeniv.linux.org.uk>
Date: Sat, 2 May 2015 14:13:58 +0000 (-0400)
Subject: ext4: switch to simple_follow_link()
X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=75e7566bea0c9b2a257441b66294be94863ef929;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git

ext4: switch to simple_follow_link()

for fast symlinks only, of course...

Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---

diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 9f3baa25ec54..066fdd7a1e2c 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -4217,6 +4217,7 @@ struct inode *ext4_iget(struct super_block *sb, unsigned long ino)
 			inode->i_op = &ext4_encrypted_symlink_inode_operations;
 			ext4_set_aops(inode);
 		} else if (ext4_inode_is_fast_symlink(inode)) {
+			inode->i_link = (char *)ei->i_data;
 			inode->i_op = &ext4_fast_symlink_inode_operations;
 			nd_terminate_link(ei->i_data, inode->i_size,
 				sizeof(ei->i_data) - 1);
diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c
index 39f8e6502639..5fdb9f6aa869 100644
--- a/fs/ext4/namei.c
+++ b/fs/ext4/namei.c
@@ -3251,8 +3251,10 @@ static int ext4_symlink(struct inode *dir,
 	} else {
 		/* clear the extent format for fast symlink */
 		ext4_clear_inode_flag(inode, EXT4_INODE_EXTENTS);
-		if (!encryption_required)
+		if (!encryption_required) {
 			inode->i_op = &ext4_fast_symlink_inode_operations;
+			inode->i_link = (char *)&EXT4_I(inode)->i_data;
+		}
 		memcpy((char *)&EXT4_I(inode)->i_data, disk_link.name,
 		       disk_link.len);
 		inode->i_size = disk_link.len - 1;
diff --git a/fs/ext4/symlink.c b/fs/ext4/symlink.c
index 49575ff7a7bb..4264fb1e341a 100644
--- a/fs/ext4/symlink.c
+++ b/fs/ext4/symlink.c
@@ -106,13 +106,6 @@ const struct inode_operations ext4_encrypted_symlink_inode_operations = {
 };
 #endif
 
-static void *ext4_follow_fast_link(struct dentry *dentry, struct nameidata *nd)
-{
-	struct ext4_inode_info *ei = EXT4_I(d_inode(dentry));
-	nd_set_link(nd, (char *) ei->i_data);
-	return NULL;
-}
-
 const struct inode_operations ext4_symlink_inode_operations = {
 	.readlink	= generic_readlink,
 	.follow_link	= page_follow_link_light,
@@ -126,7 +119,7 @@ const struct inode_operations ext4_symlink_inode_operations = {
 
 const struct inode_operations ext4_fast_symlink_inode_operations = {
 	.readlink	= generic_readlink,
-	.follow_link    = ext4_follow_fast_link,
+	.follow_link    = simple_follow_link,
 	.setattr	= ext4_setattr,
 	.setxattr	= generic_setxattr,
 	.getxattr	= generic_getxattr,