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authorChristian Brauner <brauner@kernel.org>2023-01-13 14:49:17 +0300
committerChristian Brauner (Microsoft) <brauner@kernel.org>2023-01-19 11:24:26 +0300
commite18275ae55e07a2937e48134589c2f4c1d99a369 (patch)
tree2e280f1962c08fb1ea5b23510a70ab2ba3120675 /Documentation/filesystems
parent5ebb29bee8d5fc173b774e0755be8cb335503ee3 (diff)
downloadlinux-e18275ae55e07a2937e48134589c2f4c1d99a369.tar.xz
fs: port ->rename() to pass mnt_idmap
Convert to struct mnt_idmap. Last cycle we merged the necessary infrastructure in 256c8aed2b42 ("fs: introduce dedicated idmap type for mounts"). This is just the conversion to struct mnt_idmap. Currently we still pass around the plain namespace that was attached to a mount. This is in general pretty convenient but it makes it easy to conflate namespaces that are relevant on the filesystem with namespaces that are relevent on the mount level. Especially for non-vfs developers without detailed knowledge in this area this can be a potential source for bugs. Once the conversion to struct mnt_idmap is done all helpers down to the really low-level helpers will take a struct mnt_idmap argument instead of two namespace arguments. This way it becomes impossible to conflate the two eliminating the possibility of any bugs. All of the vfs and all filesystems only operate on struct mnt_idmap. Acked-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Christian Brauner (Microsoft) <brauner@kernel.org>
Diffstat (limited to 'Documentation/filesystems')
-rw-r--r--Documentation/filesystems/locking.rst2
-rw-r--r--Documentation/filesystems/vfs.rst2
2 files changed, 2 insertions, 2 deletions
diff --git a/Documentation/filesystems/locking.rst b/Documentation/filesystems/locking.rst
index 9605928c11b5..c63890845d95 100644
--- a/Documentation/filesystems/locking.rst
+++ b/Documentation/filesystems/locking.rst
@@ -64,7 +64,7 @@ prototypes::
int (*mkdir) (struct mnt_idmap *, struct inode *,struct dentry *,umode_t);
int (*rmdir) (struct inode *,struct dentry *);
int (*mknod) (struct mnt_idmap *, struct inode *,struct dentry *,umode_t,dev_t);
- int (*rename) (struct inode *, struct dentry *,
+ int (*rename) (struct mnt_idmap *, struct inode *, struct dentry *,
struct inode *, struct dentry *, unsigned int);
int (*readlink) (struct dentry *, char __user *,int);
const char *(*get_link) (struct dentry *, struct inode *, struct delayed_call *);
diff --git a/Documentation/filesystems/vfs.rst b/Documentation/filesystems/vfs.rst
index e2cb36f15ce4..263fcc57b71f 100644
--- a/Documentation/filesystems/vfs.rst
+++ b/Documentation/filesystems/vfs.rst
@@ -429,7 +429,7 @@ As of kernel 2.6.22, the following members are defined:
int (*mkdir) (struct mnt_idmap *, struct inode *,struct dentry *,umode_t);
int (*rmdir) (struct inode *,struct dentry *);
int (*mknod) (struct mnt_idmap *, struct inode *,struct dentry *,umode_t,dev_t);
- int (*rename) (struct user_namespace *, struct inode *, struct dentry *,
+ int (*rename) (struct mnt_idmap *, struct inode *, struct dentry *,
struct inode *, struct dentry *, unsigned int);
int (*readlink) (struct dentry *, char __user *,int);
const char *(*get_link) (struct dentry *, struct inode *,