s3:modules/non_posix_acls: only stat if we do not have it cached
[kamenim/samba-autobuild/.git] / source3 / modules / non_posix_acls.c
1 /*
2    Unix SMB/CIFS implementation.
3    Access Control List handling
4    Copyright (C) Andrew Bartlett 2012.
5
6    This program is free software; you can redistribute it and/or modify
7    it under the terms of the GNU General Public License as published by
8    the Free Software Foundation; either version 3 of the License, or
9    (at your option) any later version.
10
11    This program is distributed in the hope that it will be useful,
12    but WITHOUT ANY WARRANTY; without even the implied warranty of
13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14    GNU General Public License for more details.
15
16    You should have received a copy of the GNU General Public License
17    along with this program.  If not, see <http://www.gnu.org/licenses/>.
18 */
19
20 #include "includes.h"
21 #include "../librpc/gen_ndr/ndr_xattr.h"
22 #include "modules/non_posix_acls.h"
23
24 int non_posix_sys_acl_blob_get_file_helper(vfs_handle_struct *handle,
25                                            const char *path_p,
26                                            DATA_BLOB acl_as_blob,
27                                            TALLOC_CTX *mem_ctx,
28                                            DATA_BLOB *blob)
29 {
30         int ret;
31         TALLOC_CTX *frame = talloc_stackframe();
32         struct xattr_sys_acl_hash_wrapper acl_wrapper = {};
33         struct smb_filename *smb_fname = NULL;
34         NTSTATUS status = create_synthetic_smb_fname_split(frame, path_p,
35                                                            NULL,
36                                                            &smb_fname);
37         if (!NT_STATUS_IS_OK(status)) {
38                 errno = map_errno_from_nt_status(status);
39                 TALLOC_FREE(frame);
40                 return -1;
41         }
42
43         acl_wrapper.acl_as_blob = acl_as_blob;
44
45         ret = smb_vfs_call_stat(handle, smb_fname);
46         if (ret == -1) {
47                 TALLOC_FREE(frame);
48                 return -1;
49         }
50
51         acl_wrapper.owner = smb_fname->st.st_ex_uid;
52         acl_wrapper.group = smb_fname->st.st_ex_gid;
53         acl_wrapper.mode = smb_fname->st.st_ex_mode;
54
55         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_push_struct_blob(blob, mem_ctx,
56                                                           &acl_wrapper,
57                                                           (ndr_push_flags_fn_t)ndr_push_xattr_sys_acl_hash_wrapper))) {
58                 errno = EINVAL;
59                 TALLOC_FREE(frame);
60                 return -1;
61         }
62
63         TALLOC_FREE(frame);
64         return 0;
65 }
66
67 int non_posix_sys_acl_blob_get_fd_helper(vfs_handle_struct *handle,
68                                          files_struct *fsp,
69                                          DATA_BLOB acl_as_blob,
70                                          TALLOC_CTX *mem_ctx,
71                                          DATA_BLOB *blob)
72 {
73         SMB_STRUCT_STAT sbuf;
74         TALLOC_CTX *frame;
75         struct xattr_sys_acl_hash_wrapper acl_wrapper;
76         int ret;
77
78         frame = talloc_stackframe();
79
80         acl_wrapper.acl_as_blob = acl_as_blob;
81
82         if (!VALID_STAT(fsp->fsp_name->st)) {
83                 ret = smb_vfs_call_fstat(handle, fsp, &sbuf);
84                 if (ret == -1) {
85                         TALLOC_FREE(frame);
86                         return -1;
87                 }
88         } else {
89                 sbuf = fsp->fsp_name->st;
90         }
91
92         acl_wrapper.owner = sbuf.st_ex_uid;
93         acl_wrapper.group = sbuf.st_ex_gid;
94         acl_wrapper.mode = sbuf.st_ex_mode;
95
96         if (!NDR_ERR_CODE_IS_SUCCESS(ndr_push_struct_blob(blob, mem_ctx,
97                                                           &acl_wrapper,
98                                                           (ndr_push_flags_fn_t)ndr_push_xattr_sys_acl_hash_wrapper))) {
99                 errno = EINVAL;
100                 TALLOC_FREE(frame);
101                 return -1;
102         }
103
104         TALLOC_FREE(frame);
105         return 0;
106 }