linux-kernel - [PATCH 09/79] ext4: switch to simple_follow

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Date:	Tue,  5 May 2015 06:21:43 +0100
From:	Al Viro <viro@...IV.linux.org.uk>
To:	Linus Torvalds <torvalds@...ux-foundation.org>
Cc:	Neil Brown <neilb@...e.de>, Christoph Hellwig <hch@...radead.org>,
	linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org
Subject: [PATCH 09/79] ext4: switch to simple_follow_link()

From: Al Viro <viro@...iv.linux.org.uk>

for fast symlinks only, of course...

Signed-off-by: Al Viro <viro@...iv.linux.org.uk>
---
 fs/ext4/inode.c   | 1 +
 fs/ext4/namei.c   | 4 +++-
 fs/ext4/symlink.c | 9 +--------
 3 files changed, 5 insertions(+), 9 deletions(-)

diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index a320558..aba562b 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -4219,6 +4219,7 @@ struct inode *ext4_iget(struct super_block *sb, unsigned long ino)
 			BUILD_BUG();
 #endif
 		} 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 84b1920..99017eb 100644
--- a/fs/ext4/namei.c
+++ b/fs/ext4/namei.c
@@ -3311,8 +3311,10 @@ 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 4ea5a01..1720a13 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,
-- 
2.1.4

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