/*
* check whether a file or directory is flagged as compressed.
*/
static NTSTATUS dos_mode_check_compressed(connection_struct *conn,
struct smb_filename *smb_fname,
bool *is_compressed)
{
NTSTATUS status;
uint16_t compression_fmt;
TALLOC_CTX *tmp_ctx = talloc_new(NULL);
if (tmp_ctx == NULL) {
status = NT_STATUS_NO_MEMORY;
goto err_out;
}
status = SMB_VFS_GET_COMPRESSION(conn, tmp_ctx, NULL, smb_fname,
&compression_fmt);
if (!NT_STATUS_IS_OK(status)) {
goto err_ctx_free;
}
if (compression_fmt == COMPRESSION_FORMAT_LZNT1) {
*is_compressed = true;
} else {
*is_compressed = false;
}
status = NT_STATUS_OK;
err_ctx_free:
talloc_free(tmp_ctx);
err_out:
return status;
}
static NTSTATUS fsctl_get_cmprn(TALLOC_CTX *mem_ctx,
struct tevent_context *ev,
struct files_struct *fsp,
size_t in_max_output,
DATA_BLOB *out_output)
{
struct compression_state cmpr_state;
enum ndr_err_code ndr_ret;
DATA_BLOB output;
NTSTATUS status;
if (fsp == NULL) {
return NT_STATUS_FILE_CLOSED;
}
/* Windows doesn't check for SEC_FILE_READ_ATTRIBUTE permission here */
if ((fsp->conn->fs_capabilities & FILE_FILE_COMPRESSION) == 0) {
DEBUG(4, ("FS does not advertise compression support\n"));
return NT_STATUS_NOT_SUPPORTED;
}
ZERO_STRUCT(cmpr_state);
status = SMB_VFS_GET_COMPRESSION(fsp->conn,
mem_ctx,
fsp,
NULL,
&cmpr_state.format);
if (!NT_STATUS_IS_OK(status)) {
return status;
}
ndr_ret = ndr_push_struct_blob(&output, mem_ctx,
&cmpr_state,
(ndr_push_flags_fn_t)ndr_push_compression_state);
if (ndr_ret != NDR_ERR_SUCCESS) {
return NT_STATUS_INTERNAL_ERROR;
}
if (in_max_output < output.length) {
DEBUG(1, ("max output %u too small for compression state %ld\n",
(unsigned int)in_max_output, (long int)output.length));
return NT_STATUS_INVALID_USER_BUFFER;
}
*out_output = output;
return NT_STATUS_OK;
}