Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755660AbbEEFXO (ORCPT ); Tue, 5 May 2015 01:23:14 -0400 Received: from zeniv.linux.org.uk ([195.92.253.2]:39628 "EHLO ZenIV.linux.org.uk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755562AbbEEFW4 (ORCPT ); Tue, 5 May 2015 01:22:56 -0400 From: Al Viro To: Linus Torvalds Cc: Neil Brown , Christoph Hellwig , linux-kernel@vger.kernel.org, linux-fsdevel@vger.kernel.org Subject: [PATCH 05/79] libfs: simple_follow_link() Date: Tue, 5 May 2015 06:21:39 +0100 Message-Id: <1430803373-4948-5-git-send-email-viro@ZenIV.linux.org.uk> X-Mailer: git-send-email 1.7.7.6 In-Reply-To: <20150505052205.GS889@ZenIV.linux.org.uk> References: <20150505052205.GS889@ZenIV.linux.org.uk> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2296 Lines: 74 From: Al Viro let "fast" symlinks store the pointer to the body into ->i_link and use simple_follow_link for ->follow_link() Signed-off-by: Al Viro --- fs/inode.c | 1 + fs/libfs.c | 13 +++++++++++++ include/linux/fs.h | 3 +++ 3 files changed, 17 insertions(+) diff --git a/fs/inode.c b/fs/inode.c index ea37cd1..952fb48 100644 --- a/fs/inode.c +++ b/fs/inode.c @@ -152,6 +152,7 @@ int inode_init_always(struct super_block *sb, struct inode *inode) inode->i_pipe = NULL; inode->i_bdev = NULL; inode->i_cdev = NULL; + inode->i_link = NULL; inode->i_rdev = 0; inode->dirtied_when = 0; diff --git a/fs/libfs.c b/fs/libfs.c index cb1fb4b..72e4e01 100644 --- a/fs/libfs.c +++ b/fs/libfs.c @@ -1093,3 +1093,16 @@ simple_nosetlease(struct file *filp, long arg, struct file_lock **flp, return -EINVAL; } EXPORT_SYMBOL(simple_nosetlease); + +void *simple_follow_link(struct dentry *dentry, struct nameidata *nd) +{ + nd_set_link(nd, d_inode(dentry)->i_link); + return NULL; +} +EXPORT_SYMBOL(simple_follow_link); + +const struct inode_operations simple_symlink_inode_operations = { + .follow_link = simple_follow_link, + .readlink = generic_readlink +}; +EXPORT_SYMBOL(simple_symlink_inode_operations); diff --git a/include/linux/fs.h b/include/linux/fs.h index 35ec87e..0ac758f 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -656,6 +656,7 @@ struct inode { struct pipe_inode_info *i_pipe; struct block_device *i_bdev; struct cdev *i_cdev; + char *i_link; }; __u32 i_generation; @@ -2721,6 +2722,8 @@ void __inode_sub_bytes(struct inode *inode, loff_t bytes); void inode_sub_bytes(struct inode *inode, loff_t bytes); loff_t inode_get_bytes(struct inode *inode); void inode_set_bytes(struct inode *inode, loff_t bytes); +void *simple_follow_link(struct dentry *, struct nameidata *); +extern const struct inode_operations simple_symlink_inode_operations; extern int iterate_dir(struct file *, struct dir_context *); -- 2.1.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/