diff options
| author | Christian Brauner <brauner@kernel.org> | 2023-01-13 14:49:27 +0300 |
|---|---|---|
| committer | Christian Brauner (Microsoft) <brauner@kernel.org> | 2023-01-19 11:24:29 +0300 |
| commit | 9452e93e6dae862d7aeff2b11236d79bde6f9b66 (patch) | |
| tree | bba173c3d83e596048a8c8fb34b373a0d315704e /fs/f2fs | |
| parent | 01beba7957a26f9b7179127e8ad56bb5a0f56138 (diff) | |
| download | linux-9452e93e6dae862d7aeff2b11236d79bde6f9b66.tar.xz | |
fs: port privilege checking helpers to 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/f2fs')
| -rw-r--r-- | fs/f2fs/acl.c | 12 | ||||
| -rw-r--r-- | fs/f2fs/file.c | 2 |
2 files changed, 7 insertions, 7 deletions
diff --git a/fs/f2fs/acl.c b/fs/f2fs/acl.c index 6ced63bce4e4..dd5cea743036 100644 --- a/fs/f2fs/acl.c +++ b/fs/f2fs/acl.c @@ -204,11 +204,12 @@ struct posix_acl *f2fs_get_acl(struct inode *inode, int type, bool rcu) return __f2fs_get_acl(inode, type, NULL); } -static int f2fs_acl_update_mode(struct user_namespace *mnt_userns, +static int f2fs_acl_update_mode(struct mnt_idmap *idmap, struct inode *inode, umode_t *mode_p, struct posix_acl **acl) { umode_t mode = inode->i_mode; + struct user_namespace *mnt_userns = mnt_idmap_owner(idmap); int error; if (is_inode_flag_set(inode, FI_ACL_MODE)) @@ -220,13 +221,13 @@ static int f2fs_acl_update_mode(struct user_namespace *mnt_userns, if (error == 0) *acl = NULL; if (!vfsgid_in_group_p(i_gid_into_vfsgid(mnt_userns, inode)) && - !capable_wrt_inode_uidgid(mnt_userns, inode, CAP_FSETID)) + !capable_wrt_inode_uidgid(idmap, inode, CAP_FSETID)) mode &= ~S_ISGID; *mode_p = mode; return 0; } -static int __f2fs_set_acl(struct user_namespace *mnt_userns, +static int __f2fs_set_acl(struct mnt_idmap *idmap, struct inode *inode, int type, struct posix_acl *acl, struct page *ipage) { @@ -240,7 +241,7 @@ static int __f2fs_set_acl(struct user_namespace *mnt_userns, case ACL_TYPE_ACCESS: name_index = F2FS_XATTR_INDEX_POSIX_ACL_ACCESS; if (acl && !ipage) { - error = f2fs_acl_update_mode(mnt_userns, inode, + error = f2fs_acl_update_mode(idmap, inode, &mode, &acl); if (error) return error; @@ -279,13 +280,12 @@ static int __f2fs_set_acl(struct user_namespace *mnt_userns, int f2fs_set_acl(struct mnt_idmap *idmap, struct dentry *dentry, struct posix_acl *acl, int type) { - struct user_namespace *mnt_userns = mnt_idmap_owner(idmap); struct inode *inode = d_inode(dentry); if (unlikely(f2fs_cp_error(F2FS_I_SB(inode)))) return -EIO; - return __f2fs_set_acl(mnt_userns, inode, type, acl, NULL); + return __f2fs_set_acl(idmap, inode, type, acl, NULL); } /* diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c index 33e6334bc0c6..b1486bdc83fb 100644 --- a/fs/f2fs/file.c +++ b/fs/f2fs/file.c @@ -922,7 +922,7 @@ static void __setattr_copy(struct mnt_idmap *idmap, vfsgid_t vfsgid = i_gid_into_vfsgid(mnt_userns, inode); if (!vfsgid_in_group_p(vfsgid) && - !capable_wrt_inode_uidgid(mnt_userns, inode, CAP_FSETID)) + !capable_wrt_inode_uidgid(idmap, inode, CAP_FSETID)) mode &= ~S_ISGID; set_acl_inode(inode, mode); } |