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| author | Christian Brauner <brauner@kernel.org> | 2023-01-13 12:49:16 +0100 |
|---|---|---|
| committer | Christian Brauner (Microsoft) <brauner@kernel.org> | 2023-01-19 09:24:26 +0100 |
| commit | 5ebb29bee8d5fc173b774e0755be8cb335503ee3 (patch) | |
| tree | a49f4b53b0f9135c959c3e0ee4bf862501dd17a6 /fs/fuse | |
| parent | c54bd91e9eaba43f09aadc25b52ea869ff3b5587 (diff) | |
| download | linux-stable-5ebb29bee8d5fc173b774e0755be8cb335503ee3.tar.gz linux-stable-5ebb29bee8d5fc173b774e0755be8cb335503ee3.tar.bz2 linux-stable-5ebb29bee8d5fc173b774e0755be8cb335503ee3.zip | |
fs: port ->mknod() 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/fuse')
| -rw-r--r-- | fs/fuse/dir.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/fs/fuse/dir.c b/fs/fuse/dir.c index d007e504f4c6..f6aa799fb584 100644 --- a/fs/fuse/dir.c +++ b/fs/fuse/dir.c @@ -645,7 +645,7 @@ out_err: return err; } -static int fuse_mknod(struct user_namespace *, struct inode *, struct dentry *, +static int fuse_mknod(struct mnt_idmap *, struct inode *, struct dentry *, umode_t, dev_t); static int fuse_atomic_open(struct inode *dir, struct dentry *entry, struct file *file, unsigned flags, @@ -686,7 +686,7 @@ out_dput: return err; mknod: - err = fuse_mknod(&init_user_ns, dir, entry, mode, 0); + err = fuse_mknod(&nop_mnt_idmap, dir, entry, mode, 0); if (err) goto out_dput; no_open: @@ -773,7 +773,7 @@ static int create_new_entry(struct fuse_mount *fm, struct fuse_args *args, return err; } -static int fuse_mknod(struct user_namespace *mnt_userns, struct inode *dir, +static int fuse_mknod(struct mnt_idmap *idmap, struct inode *dir, struct dentry *entry, umode_t mode, dev_t rdev) { struct fuse_mknod_in inarg; @@ -799,7 +799,7 @@ static int fuse_mknod(struct user_namespace *mnt_userns, struct inode *dir, static int fuse_create(struct mnt_idmap *idmap, struct inode *dir, struct dentry *entry, umode_t mode, bool excl) { - return fuse_mknod(&init_user_ns, dir, entry, mode, 0); + return fuse_mknod(&nop_mnt_idmap, dir, entry, mode, 0); } static int fuse_tmpfile(struct user_namespace *mnt_userns, struct inode *dir, |