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authorChristian Brauner <brauner@kernel.org>2023-01-13 12:49:22 +0100
committerChristian Brauner (Microsoft) <brauner@kernel.org>2023-01-19 09:24:28 +0100
commit4609e1f18e19c3b302e1eb4858334bca1532f780 (patch)
tree1e050d9bce359b0d808dc9ee9273ef2d6d2eaebc /Documentation/filesystems/locking.rst
parent8782a9aea3ab4d697ad67d1f8ebca38a4e1c24ab (diff)
fs: port ->permission() 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/locking.rst')
-rw-r--r--Documentation/filesystems/locking.rst2
1 files changed, 1 insertions, 1 deletions
diff --git a/Documentation/filesystems/locking.rst b/Documentation/filesystems/locking.rst
index fb23ffc0792c..d2750085a1f5 100644
--- a/Documentation/filesystems/locking.rst
+++ b/Documentation/filesystems/locking.rst
@@ -69,7 +69,7 @@ prototypes::
int (*readlink) (struct dentry *, char __user *,int);
const char *(*get_link) (struct dentry *, struct inode *, struct delayed_call *);
void (*truncate) (struct inode *);
- int (*permission) (struct inode *, int, unsigned int);
+ int (*permission) (struct mnt_idmap *, struct inode *, int, unsigned int);
struct posix_acl * (*get_inode_acl)(struct inode *, int, bool);
int (*setattr) (struct mnt_idmap *, struct dentry *, struct iattr *);
int (*getattr) (struct mnt_idmap *, const struct path *, struct kstat *, u32, unsigned int);