source3/smbd/smb2_ioctl_filesys.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    Core SMB2 server
   4
   5    Copyright (C) Stefan Metzmacher 2009
   6    Copyright (C) David Disseldorp 2013
   7
   8    This program is free software; you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation; either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    This program is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  20 */
  21
  22 #include "includes.h"
  23 #include "smbd/smbd.h"
  24 #include "smbd/globals.h"
  25 #include "../libcli/smb/smb_common.h"
  26 #include "../libcli/security/security.h"
  27 #include "../lib/util/tevent_ntstatus.h"
  28 #include "rpc_server/srv_pipe_hnd.h"
  29 #include "include/ntioctl.h"
  30 #include "../librpc/ndr/libndr.h"
  31 #include "librpc/gen_ndr/ndr_ioctl.h"
  32 #include "smb2_ioctl_private.h"
  33
  34 static NTSTATUS fsctl_get_cmprn(TALLOC_CTX *mem_ctx,
  35                                 struct tevent_context *ev,
  36                                 struct files_struct *fsp,
  37                                 size_t in_max_output,
  38                                 DATA_BLOB *out_output)
  39 {
  40         struct compression_state cmpr_state;
  41         enum ndr_err_code ndr_ret;
  42         DATA_BLOB output;
  43         NTSTATUS status;
  44
  45         if (fsp == NULL) {
  46                 return NT_STATUS_FILE_CLOSED;
  47         }
  48
  49         /* Windows doesn't check for SEC_FILE_READ_ATTRIBUTE permission here */
  50
  51         if ((fsp->conn->fs_capabilities & FILE_FILE_COMPRESSION) == 0) {
  52                 DEBUG(4, ("FS does not advertise compression support\n"));
  53                 return NT_STATUS_NOT_SUPPORTED;
  54         }
  55
  56         ZERO_STRUCT(cmpr_state);
  57         status = SMB_VFS_GET_COMPRESSION(fsp->conn,
  58                                          mem_ctx,
  59                                          fsp,
  60                                          NULL,
  61                                          &cmpr_state.format);
  62         if (!NT_STATUS_IS_OK(status)) {
  63                 return status;
  64         }
  65
  66         ndr_ret = ndr_push_struct_blob(&output, mem_ctx,
  67                                        &cmpr_state,
  68                         (ndr_push_flags_fn_t)ndr_push_compression_state);
  69         if (ndr_ret != NDR_ERR_SUCCESS) {
  70                 return NT_STATUS_INTERNAL_ERROR;
  71         }
  72
  73         if (in_max_output < output.length) {
  74                 DEBUG(1, ("max output %u too small for compression state %ld\n",
  75                       (unsigned int)in_max_output, (long int)output.length));
  76                 return NT_STATUS_INVALID_USER_BUFFER;
  77         }
  78         *out_output = output;
  79
  80         return NT_STATUS_OK;
  81 }
  82
  83 static NTSTATUS fsctl_set_cmprn(TALLOC_CTX *mem_ctx,
  84                                 struct tevent_context *ev,
  85                                 struct files_struct *fsp,
  86                                 DATA_BLOB *in_input)
  87 {
  88         struct compression_state cmpr_state;
  89         enum ndr_err_code ndr_ret;
  90         NTSTATUS status;
  91
  92         if (fsp == NULL) {
  93                 return NT_STATUS_FILE_CLOSED;
  94         }
  95
  96         /* WRITE_DATA permission is required, WRITE_ATTRIBUTES is not */
  97         status = check_access(fsp->conn, fsp, NULL,
  98                               FILE_WRITE_DATA);
  99         if (!NT_STATUS_IS_OK(status)) {
 100                 return status;
 101         }
 102
 103         if ((fsp->conn->fs_capabilities & FILE_FILE_COMPRESSION) == 0) {
 104                 DEBUG(4, ("FS does not advertise compression support\n"));
 105                 return NT_STATUS_NOT_SUPPORTED;
 106         }
 107
 108         ndr_ret = ndr_pull_struct_blob(in_input, mem_ctx, &cmpr_state,
 109                         (ndr_pull_flags_fn_t)ndr_pull_compression_state);
 110         if (ndr_ret != NDR_ERR_SUCCESS) {
 111                 DEBUG(0, ("failed to unmarshall set compression req\n"));
 112                 return NT_STATUS_INVALID_PARAMETER;
 113         }
 114
 115         status = SMB_VFS_SET_COMPRESSION(fsp->conn,
 116                                          mem_ctx,
 117                                          fsp,
 118                                          cmpr_state.format);
 119         if (!NT_STATUS_IS_OK(status)) {
 120                 return status;
 121         }
 122
 123         return NT_STATUS_OK;
 124 }
 125
 126 struct tevent_req *smb2_ioctl_filesys(uint32_t ctl_code,
 127                                       struct tevent_context *ev,
 128                                       struct tevent_req *req,
 129                                       struct smbd_smb2_ioctl_state *state)
 130 {
 131         NTSTATUS status;
 132
 133         switch (ctl_code) {
 134         case FSCTL_GET_COMPRESSION:
 135                 status = fsctl_get_cmprn(state, ev, state->fsp,
 136                                          state->in_max_output,
 137                                          &state->out_output);
 138                 if (!tevent_req_nterror(req, status)) {
 139                         tevent_req_done(req);
 140                 }
 141                 return tevent_req_post(req, ev);
 142                 break;
 143         case FSCTL_SET_COMPRESSION:
 144                 status = fsctl_set_cmprn(state, ev, state->fsp,
 145                                          &state->in_input);
 146                 if (!tevent_req_nterror(req, status)) {
 147                         tevent_req_done(req);
 148                 }
 149                 return tevent_req_post(req, ev);
 150                 break;
 151         default: {
 152                 uint8_t *out_data = NULL;
 153                 uint32_t out_data_len = 0;
 154
 155                 if (state->fsp == NULL) {
 156                         status = NT_STATUS_NOT_SUPPORTED;
 157                 } else {
 158                         status = SMB_VFS_FSCTL(state->fsp,
 159                                                state,
 160                                                ctl_code,
 161                                                state->smbreq->flags2,
 162                                                state->in_input.data,
 163                                                state->in_input.length,
 164                                                &out_data,
 165                                                state->in_max_output,
 166                                                &out_data_len);
 167                         state->out_output = data_blob_const(out_data, out_data_len);
 168                         if (NT_STATUS_IS_OK(status)) {
 169                                 tevent_req_done(req);
 170                                 return tevent_req_post(req, ev);
 171                         }
 172                 }
 173
 174                 if (NT_STATUS_EQUAL(status, NT_STATUS_NOT_SUPPORTED)) {
 175                         if (IS_IPC(state->smbreq->conn)) {
 176                                 status = NT_STATUS_FS_DRIVER_REQUIRED;
 177                         } else {
 178                                 status = NT_STATUS_INVALID_DEVICE_REQUEST;
 179                         }
 180                 }
 181
 182                 tevent_req_nterror(req, status);
 183                 return tevent_req_post(req, ev);
 184                 break;
 185         }
 186         }
 187
 188         tevent_req_nterror(req, NT_STATUS_INTERNAL_ERROR);
 189         return tevent_req_post(req, ev);
 190 }