diff options
| author | Christian Brauner <brauner@kernel.org> | 2023-01-13 12:49:22 +0100 |
|---|---|---|
| committer | Christian Brauner (Microsoft) <brauner@kernel.org> | 2023-01-19 09:24:28 +0100 |
| commit | 4609e1f18e19c3b302e1eb4858334bca1532f780 (patch) | |
| tree | 1e050d9bce359b0d808dc9ee9273ef2d6d2eaebc /fs/ksmbd/smbacl.c | |
| parent | 8782a9aea3ab4d697ad67d1f8ebca38a4e1c24ab (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 'fs/ksmbd/smbacl.c')
| -rw-r--r-- | fs/ksmbd/smbacl.c | 15 |
1 files changed, 8 insertions, 7 deletions
diff --git a/fs/ksmbd/smbacl.c b/fs/ksmbd/smbacl.c index 6e144880eeff..31255290b435 100644 --- a/fs/ksmbd/smbacl.c +++ b/fs/ksmbd/smbacl.c @@ -1002,13 +1002,13 @@ int smb_inherit_dacl(struct ksmbd_conn *conn, struct smb_ntsd *parent_pntsd = NULL; struct smb_sid owner_sid, group_sid; struct dentry *parent = path->dentry->d_parent; - struct user_namespace *user_ns = mnt_user_ns(path->mnt); + struct mnt_idmap *idmap = mnt_idmap(path->mnt); int inherited_flags = 0, flags = 0, i, ace_cnt = 0, nt_size = 0, pdacl_size; int rc = 0, num_aces, dacloffset, pntsd_type, pntsd_size, acl_len, aces_size; char *aces_base; bool is_dir = S_ISDIR(d_inode(path->dentry)->i_mode); - pntsd_size = ksmbd_vfs_get_sd_xattr(conn, user_ns, + pntsd_size = ksmbd_vfs_get_sd_xattr(conn, idmap, parent, &parent_pntsd); if (pntsd_size <= 0) return -ENOENT; @@ -1162,7 +1162,7 @@ pass: pntsd_size += sizeof(struct smb_acl) + nt_size; } - ksmbd_vfs_set_sd_xattr(conn, user_ns, + ksmbd_vfs_set_sd_xattr(conn, idmap, path->dentry, pntsd, pntsd_size); kfree(pntsd); } @@ -1190,7 +1190,8 @@ bool smb_inherit_flags(int flags, bool is_dir) int smb_check_perm_dacl(struct ksmbd_conn *conn, const struct path *path, __le32 *pdaccess, int uid) { - struct user_namespace *user_ns = mnt_user_ns(path->mnt); + struct mnt_idmap *idmap = mnt_idmap(path->mnt); + struct user_namespace *user_ns = mnt_idmap_owner(idmap); struct smb_ntsd *pntsd = NULL; struct smb_acl *pdacl; struct posix_acl *posix_acls; @@ -1206,7 +1207,7 @@ int smb_check_perm_dacl(struct ksmbd_conn *conn, const struct path *path, unsigned short ace_size; ksmbd_debug(SMB, "check permission using windows acl\n"); - pntsd_size = ksmbd_vfs_get_sd_xattr(conn, user_ns, + pntsd_size = ksmbd_vfs_get_sd_xattr(conn, idmap, path->dentry, &pntsd); if (pntsd_size <= 0 || !pntsd) goto err_out; @@ -1415,8 +1416,8 @@ int set_info_sec(struct ksmbd_conn *conn, struct ksmbd_tree_connect *tcon, if (test_share_config_flag(tcon->share_conf, KSMBD_SHARE_FLAG_ACL_XATTR)) { /* Update WinACL in xattr */ - ksmbd_vfs_remove_sd_xattrs(user_ns, path->dentry); - ksmbd_vfs_set_sd_xattr(conn, user_ns, + ksmbd_vfs_remove_sd_xattrs(idmap, path->dentry); + ksmbd_vfs_set_sd_xattr(conn, idmap, path->dentry, pntsd, ntsd_len); } |