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https://github.com/samba-team/samba.git
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97c12be097
Signed-off-by: Jeremy Allison <jra@samba.org> Reviewed-by: Ralph Boehme <slow@samba.org>
129 lines
3.3 KiB
C
129 lines
3.3 KiB
C
/*
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* Module to work around a bug in Linux XFS:
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* http://oss.sgi.com/bugzilla/show_bug.cgi?id=280
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*
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* Copyright (c) Volker Lendecke 2010
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see <http://www.gnu.org/licenses/>.
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*/
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#include "includes.h"
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#include "system/filesys.h"
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#include "smbd/smbd.h"
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static int linux_xfs_sgid_mkdirat(vfs_handle_struct *handle,
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struct files_struct *dirfsp,
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const struct smb_filename *smb_fname,
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mode_t mode)
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{
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struct smb_filename *dname = NULL;
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struct smb_filename *fname = NULL;
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int mkdir_res;
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int res;
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NTSTATUS status;
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DEBUG(10, ("Calling linux_xfs_sgid_mkdirat(%s)\n",
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smb_fname->base_name));
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mkdir_res = SMB_VFS_NEXT_MKDIRAT(handle,
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dirfsp,
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smb_fname,
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mode);
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if (mkdir_res == -1) {
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DEBUG(10, ("SMB_VFS_NEXT_MKDIRAT returned error: %s\n",
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strerror(errno)));
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return mkdir_res;
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}
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fname = full_path_from_dirfsp_atname(talloc_tos(),
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dirfsp,
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smb_fname);
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if (fname == NULL) {
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return -1;
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}
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status = SMB_VFS_PARENT_PATHNAME(handle->conn,
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talloc_tos(),
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fname,
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&dname,
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NULL);
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if (!NT_STATUS_IS_OK(status)) {
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DBG_WARNING("SMB_VFS_PARENT_PATHNAME() failed with %s\n",
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nt_errstr(status));
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/* return success, we did the mkdir */
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return mkdir_res;
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}
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res = SMB_VFS_NEXT_STAT(handle, dname);
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if (res == -1) {
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DBG_DEBUG("NEXT_STAT(%s) failed: %s\n",
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smb_fname_str_dbg(dname),
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strerror(errno));
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/* return success, we did the mkdir */
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return mkdir_res;
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}
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if ((dname->st.st_ex_mode & S_ISGID) == 0) {
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/* No SGID to inherit */
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DEBUG(10, ("No SGID to inherit\n"));
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TALLOC_FREE(dname);
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return mkdir_res;
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}
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TALLOC_FREE(dname);
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res = SMB_VFS_NEXT_STAT(handle, fname);
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if (res == -1) {
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DBG_NOTICE("Could not stat just created dir %s: %s\n",
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smb_fname_str_dbg(fname),
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strerror(errno));
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/* return success, we did the mkdir */
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TALLOC_FREE(fname);
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return mkdir_res;
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}
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fname->st.st_ex_mode |= S_ISGID;
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fname->st.st_ex_mode &= ~S_IFDIR;
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/*
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* Yes, we have to do this as root. If you do it as
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* non-privileged user, XFS on Linux will just ignore us and
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* return success. What can you do...
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*/
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become_root();
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res = SMB_VFS_NEXT_FCHMOD(handle, smb_fname->fsp, fname->st.st_ex_mode);
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unbecome_root();
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if (res == -1) {
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DBG_NOTICE("CHMOD(%s, %o) failed: %s\n",
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smb_fname_str_dbg(fname),
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(int)fname->st.st_ex_mode,
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strerror(errno));
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/* return success, we did the mkdir */
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TALLOC_FREE(fname);
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return mkdir_res;
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}
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TALLOC_FREE(fname);
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return mkdir_res;
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}
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static struct vfs_fn_pointers linux_xfs_sgid_fns = {
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.mkdirat_fn = linux_xfs_sgid_mkdirat,
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};
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static_decl_vfs;
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NTSTATUS vfs_linux_xfs_sgid_init(TALLOC_CTX *ctx)
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{
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return smb_register_vfs(SMB_VFS_INTERFACE_VERSION,
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"linux_xfs_sgid", &linux_xfs_sgid_fns);
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}
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