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/*
* 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"
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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_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 = {
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. mkdir_fn = linux_xfs_sgid_mkdir ,
. chmod_acl_fn = linux_xfs_sgid_chmod_acl ,
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} ;
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 ) ;
}