2 * Module to work around a bug in Linux XFS:
3 * http://oss.sgi.com/bugzilla/show_bug.cgi?id=280
5 * Copyright (c) Volker Lendecke 2010
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License as published by
9 * the Free Software Foundation; either version 3 of the License, or
10 * (at your option) any later version.
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
17 * You should have received a copy of the GNU General Public License
18 * along with this program; if not, see <http://www.gnu.org/licenses/>.
22 #include "system/filesys.h"
23 #include "smbd/smbd.h"
25 static int linux_xfs_sgid_mkdirat(vfs_handle_struct *handle,
26 struct files_struct *dirfsp,
27 const struct smb_filename *smb_fname,
30 struct smb_filename *dname = NULL;
31 struct smb_filename *fname = NULL;
36 DEBUG(10, ("Calling linux_xfs_sgid_mkdirat(%s)\n",
37 smb_fname->base_name));
39 mkdir_res = SMB_VFS_NEXT_MKDIRAT(handle,
43 if (mkdir_res == -1) {
44 DEBUG(10, ("SMB_VFS_NEXT_MKDIRAT returned error: %s\n",
49 fname = full_path_from_dirfsp_atname(talloc_tos(),
56 status = SMB_VFS_PARENT_PATHNAME(handle->conn,
61 if (!NT_STATUS_IS_OK(status)) {
62 DBG_WARNING("SMB_VFS_PARENT_PATHNAME() failed with %s\n",
64 /* return success, we did the mkdir */
68 res = SMB_VFS_NEXT_STAT(handle, dname);
70 DBG_DEBUG("NEXT_STAT(%s) failed: %s\n",
71 smb_fname_str_dbg(dname),
73 /* return success, we did the mkdir */
76 if ((dname->st.st_ex_mode & S_ISGID) == 0) {
77 /* No SGID to inherit */
78 DEBUG(10, ("No SGID to inherit\n"));
84 res = SMB_VFS_NEXT_STAT(handle, fname);
86 DBG_NOTICE("Could not stat just created dir %s: %s\n",
87 smb_fname_str_dbg(fname),
89 /* return success, we did the mkdir */
93 fname->st.st_ex_mode |= S_ISGID;
94 fname->st.st_ex_mode &= ~S_IFDIR;
97 * Yes, we have to do this as root. If you do it as
98 * non-privileged user, XFS on Linux will just ignore us and
99 * return success. What can you do...
102 res = SMB_VFS_NEXT_FCHMOD(handle, smb_fname->fsp, fname->st.st_ex_mode);
106 DBG_NOTICE("CHMOD(%s, %o) failed: %s\n",
107 smb_fname_str_dbg(fname),
108 (int)fname->st.st_ex_mode,
110 /* return success, we did the mkdir */
119 static struct vfs_fn_pointers linux_xfs_sgid_fns = {
120 .mkdirat_fn = linux_xfs_sgid_mkdirat,
124 NTSTATUS vfs_linux_xfs_sgid_init(TALLOC_CTX *ctx)
126 return smb_register_vfs(SMB_VFS_INTERFACE_VERSION,
127 "linux_xfs_sgid", &linux_xfs_sgid_fns);