source3/modules/vfs_aixacl.c

   1 /*
   2    Unix SMB/Netbios implementation.
   3    VFS module to get and set posix acls
   4    Copyright (C) Jim McDonough <jmcd@us.ibm.com> 2006
   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 "system/filesys.h"
  22 #include "smbd/smbd.h"
  23 #include "vfs_aixacl_util.h"
  24
  25 SMB_ACL_T aixacl_sys_acl_get_fd(vfs_handle_struct *handle,
  26                                 files_struct *fsp,
  27                                 SMB_ACL_TYPE_T type,
  28                                 TALLOC_CTX *mem_ctx)
  29 {
  30
  31         struct acl *file_acl = (struct acl *)NULL;
  32         struct smb_acl_t *result = (struct smb_acl_t *)NULL;
  33
  34         int rc = 0;
  35         uid_t user_id;
  36
  37         /* AIX has no DEFAULT */
  38         if  ( type == SMB_ACL_TYPE_DEFAULT ) {
  39                 return NULL;
  40         }
  41
  42         /* Get the acl using fstatacl */
  43
  44         DEBUG(10,("Entering AIX sys_acl_get_fd\n"));
  45         DEBUG(10,("fd is %d\n",fsp_get_io_fd(fsp)));
  46         file_acl = (struct acl *)SMB_MALLOC(BUFSIZ);
  47
  48         if(file_acl == NULL) {
  49                 errno=ENOMEM;
  50                 DEBUG(0,("Error in AIX sys_acl_get_fd is %d\n",errno));
  51                 return(NULL);
  52         }
  53
  54         memset(file_acl,0,BUFSIZ);
  55
  56         rc = fstatacl(fsp_get_io_fd(fsp),0,file_acl,BUFSIZ);
  57         if( (rc == -1) && (errno == ENOSPC)) {
  58                 struct acl *new_acl = SMB_MALLOC(file_acl->acl_len + sizeof(struct acl));
  59                 if( new_acl == NULL) {
  60                         SAFE_FREE(file_acl);
  61                         errno = ENOMEM;
  62                         return NULL;
  63                 }
  64                 file_acl = new_acl;
  65                 rc = fstatacl(fsp_get_io_fd(fsp),0,file_acl,file_acl->acl_len + sizeof(struct acl));
  66                 if( rc == -1) {
  67                         DEBUG(0,("fstatacl returned %d with errno %d\n",rc,errno));
  68                         SAFE_FREE(file_acl);
  69                         return(NULL);
  70                 }
  71         }
  72
  73         DEBUG(10,("Got facl and returned it\n"));
  74
  75         result = aixacl_to_smbacl(file_acl, mem_ctx);
  76         SAFE_FREE(file_acl);
  77         return result;
  78
  79         /*errno = ENOTSUP;
  80         return NULL;*/
  81 }
  82
  83 int aixacl_sys_acl_set_fd(vfs_handle_struct *handle,
  84                             files_struct *fsp,
  85                             SMB_ACL_TYPE_T type,
  86                             SMB_ACL_T theacl)
  87 {
  88         struct acl *file_acl = NULL;
  89         unsigned int rc;
  90
  91         file_acl = aixacl_smb_to_aixacl(type, theacl);
  92         if (!file_acl)
  93                 return -1;
  94
  95         if (fsp->fsp_flags.is_pathref) {
  96                 /*
  97                  * This is no longer a handle based call.
  98                  */
  99                 return chacl(fsp->fsp_name->base_name,
 100                              file_acl,
 101                              file_acl->acl_len);
 102         }
 103
 104         rc = fchacl(fsp_get_io_fd(fsp),file_acl,file_acl->acl_len);
 105         DEBUG(10,("errno is %d\n",errno));
 106         DEBUG(10,("return code is %d\n",rc));
 107         SAFE_FREE(file_acl);
 108         DEBUG(10,("Exiting aixacl_sys_acl_set_fd\n"));
 109
 110         return rc;
 111 }
 112
 113 int aixacl_sys_acl_delete_def_fd(vfs_handle_struct *handle,
 114                                  files_struct *fsp)
 115 {
 116         return 0; /* otherwise you can't set acl at upper level */
 117 }
 118
 119 static struct vfs_fn_pointers vfs_aixacl_fns = {
 120         .sys_acl_get_fd_fn = aixacl_sys_acl_get_fd,
 121         .sys_acl_blob_get_fd_fn = posix_sys_acl_blob_get_fd,
 122         .sys_acl_set_fd_fn = aixacl_sys_acl_set_fd,
 123         .sys_acl_delete_def_fd_fn = aixacl_sys_acl_delete_def_fd,
 124 };
 125
 126 static_decl_vfs;
 127 NTSTATUS vfs_aixacl_init(TALLOC_CTX *ctx)
 128 {
 129         return smb_register_vfs(SMB_VFS_INTERFACE_VERSION, "aixacl",
 130                                 &vfs_aixacl_fns);
 131 }