From fd4a0edf2a3d781c6ae07d2810776ce22302ee1c Mon Sep 17 00:00:00 2001 From: Miklos Szeredi Date: Fri, 9 Dec 2016 16:45:04 +0100 Subject: vfs: replace calling i_op->readlink with vfs_readlink() Also check d_is_symlink() in callers instead of inode->i_op->readlink because following patches will allow NULL ->readlink for symlinks. Signed-off-by: Miklos Szeredi --- fs/namei.c | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) (limited to 'fs/namei.c') diff --git a/fs/namei.c b/fs/namei.c index 5b4eed221530..12a4159de72a 100644 --- a/fs/namei.c +++ b/fs/namei.c @@ -4668,6 +4668,27 @@ int generic_readlink(struct dentry *dentry, char __user *buffer, int buflen) } EXPORT_SYMBOL(generic_readlink); +/** + * vfs_readlink - copy symlink body into userspace buffer + * @dentry: dentry on which to get symbolic link + * @buffer: user memory pointer + * @buflen: size of buffer + * + * Does not touch atime. That's up to the caller if necessary + * + * Does not call security hook. + */ +int vfs_readlink(struct dentry *dentry, char __user *buffer, int buflen) +{ + struct inode *inode = d_inode(dentry); + + if (!inode->i_op->readlink) + return -EINVAL; + + return inode->i_op->readlink(dentry, buffer, buflen); +} +EXPORT_SYMBOL(vfs_readlink); + /** * vfs_get_link - get symlink body * @dentry: dentry on which to get symbolic link -- cgit v1.2.3-59-g8ed1b