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authorChristian Brauner <brauner@kernel.org>2023-01-13 14:49:13 +0300
committerChristian Brauner (Microsoft) <brauner@kernel.org>2023-01-19 11:24:25 +0300
commit6c960e68aaed335a0040f16654f3c5e5bfcf9249 (patch)
treec904d5109336fc0d205117643a95166dee54e58a /fs/9p
parentb74d24f7a74ffd2d42ca883d84b7422b8d545901 (diff)
downloadlinux-6c960e68aaed335a0040f16654f3c5e5bfcf9249.tar.xz
fs: port ->create() 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 'fs/9p')
-rw-r--r--fs/9p/vfs_inode.c4
-rw-r--r--fs/9p/vfs_inode_dotl.c5
2 files changed, 5 insertions, 4 deletions
diff --git a/fs/9p/vfs_inode.c b/fs/9p/vfs_inode.c
index ee47b2bb3712..693afb66c0c1 100644
--- a/fs/9p/vfs_inode.c
+++ b/fs/9p/vfs_inode.c
@@ -672,7 +672,7 @@ error:
/**
* v9fs_vfs_create - VFS hook to create a regular file
- * @mnt_userns: The user namespace of the mount
+ * @idmap: idmap of the mount
* @dir: The parent directory
* @dentry: The name of file to be created
* @mode: The UNIX file mode to set
@@ -684,7 +684,7 @@ error:
*/
static int
-v9fs_vfs_create(struct user_namespace *mnt_userns, struct inode *dir,
+v9fs_vfs_create(struct mnt_idmap *idmap, struct inode *dir,
struct dentry *dentry, umode_t mode, bool excl)
{
struct v9fs_session_info *v9ses = v9fs_inode2v9ses(dir);
diff --git a/fs/9p/vfs_inode_dotl.c b/fs/9p/vfs_inode_dotl.c
index 08ec5e7b628d..6f651d5757a5 100644
--- a/fs/9p/vfs_inode_dotl.c
+++ b/fs/9p/vfs_inode_dotl.c
@@ -211,7 +211,7 @@ int v9fs_open_to_dotl_flags(int flags)
/**
* v9fs_vfs_create_dotl - VFS hook to create files for 9P2000.L protocol.
- * @mnt_userns: The user namespace of the mount
+ * @idmap: The user namespace of the mount
* @dir: directory inode that is being created
* @dentry: dentry that is being deleted
* @omode: create permissions
@@ -219,9 +219,10 @@ int v9fs_open_to_dotl_flags(int flags)
*
*/
static int
-v9fs_vfs_create_dotl(struct user_namespace *mnt_userns, struct inode *dir,
+v9fs_vfs_create_dotl(struct mnt_idmap *idmap, struct inode *dir,
struct dentry *dentry, umode_t omode, bool excl)
{
+ struct user_namespace *mnt_userns = mnt_idmap_owner(idmap);
return v9fs_vfs_mknod_dotl(mnt_userns, dir, dentry, omode, 0);
}