lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  PHC 
Open Source and information security mailing list archives
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [thread-next>] [day] [month] [year] [list]
Date:	Thu, 23 Sep 2010 14:53:28 -0700
From:	Matt Helsley <>
Cc:	Matt Helsley <>,
	"Theodore Ts'o" <>,
	Andreas Dilger <>,
	Jan Kara <>,,, Al Viro <>
Subject: [PATCH 2/6] [RFC] Create the .relink file_operation

Not all filesystems will necessarily be able to support relinking an
orphan inode back into the filesystem. Some offlist feedback suggested
that instead of overloading .link that relinking should be a separate
file operation for this reason.

Since .relink is a superset of .link make the VFS call .relink where
possible and .link otherwise.

The next commit will change ext3/4 to enable this operation.

Signed-off-by: Matt Helsley <>
Cc: Theodore Ts'o <>
Cc: Andreas Dilger <>
Cc: Jan Kara <>
Cc: Al Viro <>
 fs/namei.c         |    5 ++++-
 include/linux/fs.h |    1 +
 2 files changed, 5 insertions(+), 1 deletions(-)

diff --git a/fs/namei.c b/fs/namei.c
index a7dce91..eb279e3 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -2446,7 +2446,10 @@ int vfs_link(struct dentry *old_dentry, struct inode *dir, struct dentry *new_de
 		return error;
-	error = dir->i_op->link(old_dentry, dir, new_dentry);
+	if (dir->i_op->relink)
+		error = dir->i_op->relink(old_dentry, dir, new_dentry);
+	else
+		error = dir->i_op->link(old_dentry, dir, new_dentry);
 	if (!error)
 		fsnotify_link(dir, inode, new_dentry);
diff --git a/include/linux/fs.h b/include/linux/fs.h
index ee725ff..d932eb7 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -1528,6 +1528,7 @@ struct inode_operations {
 	int (*create) (struct inode *,struct dentry *,int, struct nameidata *);
 	struct dentry * (*lookup) (struct inode *,struct dentry *, struct nameidata *);
 	int (*link) (struct dentry *,struct inode *,struct dentry *);
+	int (*relink) (struct dentry *,struct inode *,struct dentry *);
 	int (*unlink) (struct inode *,struct dentry *);
 	int (*symlink) (struct inode *,struct dentry *,const char *);
 	int (*mkdir) (struct inode *,struct dentry *,int);

To unsubscribe from this list: send the line "unsubscribe linux-ext4" in
the body of a message to
More majordomo info at

Powered by blists - more mailing lists