/* * Module to work around a bug in Linux XFS: * http://oss.sgi.com/bugzilla/show_bug.cgi?id=280 * * Copyright (c) Volker Lendecke 2010 * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 3 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, see <http://www.gnu.org/licenses/>. */ #include "includes.h" static int linux_xfs_sgid_mkdir(vfs_handle_struct *handle, const char *path, mode_t mode) { struct smb_filename fname = { 0, }; int mkdir_res; int res; DEBUG(10, ("Calling linux_xfs_sgid_mkdir(%s)\n", path)); mkdir_res = SMB_VFS_NEXT_MKDIR(handle, path, mode); if (mkdir_res == -1) { DEBUG(10, ("SMB_VFS_NEXT_MKDIR returned error: %s\n", strerror(errno))); return mkdir_res; } if (!parent_dirname(talloc_tos(), path, &fname.base_name, NULL)) { DEBUG(1, ("parent_dirname failed\n")); /* return success, we did the mkdir */ return mkdir_res; } res = SMB_VFS_NEXT_STAT(handle, &fname); if (res == -1) { DEBUG(10, ("NEXT_STAT(%s) failed: %s\n", fname.base_name, strerror(errno))); /* return success, we did the mkdir */ return mkdir_res; } TALLOC_FREE(fname.base_name); if ((fname.st.st_ex_mode & S_ISGID) == 0) { /* No SGID to inherit */ DEBUG(10, ("No SGID to inherit\n")); return mkdir_res; } fname.base_name = discard_const_p(char, path); res = SMB_VFS_NEXT_STAT(handle, &fname); if (res == -1) { DEBUG(2, ("Could not stat just created dir %s: %s\n", path, strerror(errno))); /* return success, we did the mkdir */ return mkdir_res; } fname.st.st_ex_mode |= S_ISGID; fname.st.st_ex_mode &= ~S_IFDIR; /* * Yes, we have to do this as root. If you do it as * non-privileged user, XFS on Linux will just ignore us and * return success. What can you do... */ become_root(); res = SMB_VFS_NEXT_CHMOD(handle, path, fname.st.st_ex_mode); unbecome_root(); if (res == -1) { DEBUG(2, ("CHMOD(%s, %o) failed: %s\n", path, (int)fname.st.st_ex_mode, strerror(errno))); /* return success, we did the mkdir */ return mkdir_res; } return mkdir_res; } static int linux_xfs_sgid_chmod_acl(vfs_handle_struct *handle, const char *name, mode_t mode) { errno = ENOSYS; return -1; } static struct vfs_fn_pointers linux_xfs_sgid_fns = { .mkdir = linux_xfs_sgid_mkdir, .chmod_acl = linux_xfs_sgid_chmod_acl, }; NTSTATUS vfs_linux_xfs_sgid_init(void); NTSTATUS vfs_linux_xfs_sgid_init(void) { return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "linux_xfs_sgid", &linux_xfs_sgid_fns); }