static void new_break_message_smb1(files_struct *fsp, int cmd,
char result[SMB1_BREAK_MESSAGE_LENGTH])
{
memset(result,'\0',smb_size);
srv_set_message(result,8,0,true);
SCVAL(result,smb_com,SMBlockingX);
SSVAL(result,smb_tid,fsp->conn->cnum);
SSVAL(result,smb_pid,0xFFFF);
SSVAL(result,smb_uid,0);
SSVAL(result,smb_mid,0xFFFF);
SCVAL(result,smb_vwv0,0xFF);
SSVAL(result,smb_vwv2,fsp->fnum);
SCVAL(result,smb_vwv3,LOCKING_ANDX_OPLOCK_RELEASE);
SCVAL(result,smb_vwv3+1,cmd);
}
void reply_pipe_read_and_X(struct smb_request *req)
{
smb_np_struct *p = get_rpc_pipe_p(SVAL(req->inbuf,smb_vwv2));
int smb_maxcnt = SVAL(req->inbuf,smb_vwv5);
int smb_mincnt = SVAL(req->inbuf,smb_vwv6);
int nread = -1;
char *data;
bool unused;
/* we don't use the offset given to use for pipe reads. This
is deliberate, instead we always return the next lump of
data on the pipe */
#if 0
uint32 smb_offs = IVAL(req->inbuf,smb_vwv3);
#endif
if (!p) {
reply_doserror(req, ERRDOS, ERRbadfid);
return;
}
reply_outbuf(req, 12, smb_maxcnt);
data = smb_buf(req->outbuf);
nread = read_from_pipe(p, data, smb_maxcnt, &unused);
if (nread < 0) {
reply_doserror(req, ERRDOS, ERRnoaccess);
return;
}
srv_set_message((char *)req->outbuf, 12, nread, False);
SSVAL(req->outbuf,smb_vwv5,nread);
SSVAL(req->outbuf,smb_vwv6,smb_offset(data,req->outbuf));
SSVAL(smb_buf(req->outbuf),-2,nread);
DEBUG(3,("readX-IPC pnum=%04x min=%d max=%d nread=%d\n",
p->pnum, smb_mincnt, smb_maxcnt, nread));
chain_reply(req);
}
NTSTATUS schedule_aio_write_and_X(connection_struct *conn,
struct smb_request *smbreq,
files_struct *fsp, const char *data,
SMB_OFF_T startpos,
size_t numtowrite)
{
struct aio_extra *aio_ex;
SMB_STRUCT_AIOCB *a;
size_t bufsize;
size_t min_aio_write_size = lp_aio_write_size(SNUM(conn));
int ret;
/* Ensure aio is initialized. */
if (!initialize_async_io_handler()) {
return NT_STATUS_RETRY;
}
if (fsp->base_fsp != NULL) {
/* No AIO on streams yet */
DEBUG(10, ("AIO on streams not yet supported\n"));
return NT_STATUS_RETRY;
}
if ((!min_aio_write_size || (numtowrite < min_aio_write_size))
&& !SMB_VFS_AIO_FORCE(fsp)) {
/* Too small a write for aio request. */
DEBUG(10,("schedule_aio_write_and_X: write size (%u) too "
"small for minimum aio_write of %u\n",
(unsigned int)numtowrite,
(unsigned int)min_aio_write_size ));
return NT_STATUS_RETRY;
}
/* Only do this on non-chained and non-chaining writes not using the
* write cache. */
if (req_is_in_chain(smbreq) || (lp_write_cache_size(SNUM(conn)) != 0)) {
return NT_STATUS_RETRY;
}
if (outstanding_aio_calls >= aio_pending_size) {
DEBUG(3,("schedule_aio_write_and_X: Already have %d aio "
"activities outstanding.\n",
outstanding_aio_calls ));
DEBUG(10,("schedule_aio_write_and_X: failed to schedule "
"aio_write for file %s, offset %.0f, len = %u "
"(mid = %u)\n",
fsp_str_dbg(fsp), (double)startpos,
(unsigned int)numtowrite,
(unsigned int)smbreq->mid ));
return NT_STATUS_RETRY;
}
bufsize = smb_size + 6*2;
if (!(aio_ex = create_aio_extra(NULL, fsp, bufsize))) {
DEBUG(0,("schedule_aio_write_and_X: malloc fail.\n"));
return NT_STATUS_NO_MEMORY;
}
aio_ex->handle_completion = handle_aio_write_complete;
aio_ex->write_through = BITSETW(smbreq->vwv+7,0);
construct_reply_common_req(smbreq, (char *)aio_ex->outbuf.data);
srv_set_message((char *)aio_ex->outbuf.data, 6, 0, True);
SCVAL(aio_ex->outbuf.data,smb_vwv0,0xFF); /* Never a chained reply. */
init_strict_lock_struct(fsp, (uint64_t)smbreq->smbpid,
(uint64_t)startpos, (uint64_t)numtowrite, WRITE_LOCK,
&aio_ex->lock);
/* Take the lock until the AIO completes. */
if (!SMB_VFS_STRICT_LOCK(conn, fsp, &aio_ex->lock)) {
TALLOC_FREE(aio_ex);
return NT_STATUS_FILE_LOCK_CONFLICT;
}
a = &aio_ex->acb;
/* Now set up the aio record for the write call. */
a->aio_fildes = fsp->fh->fd;
a->aio_buf = discard_const_p(char, data);
a->aio_nbytes = numtowrite;
a->aio_offset = startpos;
a->aio_sigevent.sigev_notify = SIGEV_SIGNAL;
a->aio_sigevent.sigev_signo = RT_SIGNAL_AIO;
a->aio_sigevent.sigev_value.sival_ptr = aio_ex;
ret = SMB_VFS_AIO_WRITE(fsp, a);
if (ret == -1) {
DEBUG(3,("schedule_aio_wrote_and_X: aio_write failed. "
"Error %s\n", strerror(errno) ));
SMB_VFS_STRICT_UNLOCK(conn, fsp, &aio_ex->lock);
TALLOC_FREE(aio_ex);
return NT_STATUS_RETRY;
}
outstanding_aio_calls++;
aio_ex->smbreq = talloc_move(aio_ex, &smbreq);
/* This should actually be improved to span the write. */
contend_level2_oplocks_begin(fsp, LEVEL2_CONTEND_WRITE);
contend_level2_oplocks_end(fsp, LEVEL2_CONTEND_WRITE);
if (!aio_ex->write_through && !lp_syncalways(SNUM(fsp->conn))
&& fsp->aio_write_behind) {
/* Lie to the client and immediately claim we finished the
* write. */
SSVAL(aio_ex->outbuf.data,smb_vwv2,numtowrite);
SSVAL(aio_ex->outbuf.data,smb_vwv4,(numtowrite>>16)&1);
show_msg((char *)aio_ex->outbuf.data);
if (!srv_send_smb(aio_ex->smbreq->sconn,
(char *)aio_ex->outbuf.data,
true, aio_ex->smbreq->seqnum+1,
IS_CONN_ENCRYPTED(fsp->conn),
&aio_ex->smbreq->pcd)) {
exit_server_cleanly("schedule_aio_write_and_X: "
"srv_send_smb failed.");
}
DEBUG(10,("schedule_aio_write_and_X: scheduled aio_write "
"behind for file %s\n", fsp_str_dbg(fsp)));
}
NTSTATUS schedule_aio_read_and_X(connection_struct *conn,
struct smb_request *smbreq,
files_struct *fsp, SMB_OFF_T startpos,
size_t smb_maxcnt)
{
struct aio_extra *aio_ex;
SMB_STRUCT_AIOCB *a;
size_t bufsize;
size_t min_aio_read_size = lp_aio_read_size(SNUM(conn));
int ret;
/* Ensure aio is initialized. */
if (!initialize_async_io_handler()) {
return NT_STATUS_RETRY;
}
if (fsp->base_fsp != NULL) {
/* No AIO on streams yet */
DEBUG(10, ("AIO on streams not yet supported\n"));
return NT_STATUS_RETRY;
}
if ((!min_aio_read_size || (smb_maxcnt < min_aio_read_size))
&& !SMB_VFS_AIO_FORCE(fsp)) {
/* Too small a read for aio request. */
DEBUG(10,("schedule_aio_read_and_X: read size (%u) too small "
"for minimum aio_read of %u\n",
(unsigned int)smb_maxcnt,
(unsigned int)min_aio_read_size ));
return NT_STATUS_RETRY;
}
/* Only do this on non-chained and non-chaining reads not using the
* write cache. */
if (req_is_in_chain(smbreq) || (lp_write_cache_size(SNUM(conn)) != 0)) {
return NT_STATUS_RETRY;
}
if (outstanding_aio_calls >= aio_pending_size) {
DEBUG(10,("schedule_aio_read_and_X: Already have %d aio "
"activities outstanding.\n",
outstanding_aio_calls ));
return NT_STATUS_RETRY;
}
/* The following is safe from integer wrap as we've already checked
smb_maxcnt is 128k or less. Wct is 12 for read replies */
bufsize = smb_size + 12 * 2 + smb_maxcnt;
if ((aio_ex = create_aio_extra(NULL, fsp, bufsize)) == NULL) {
DEBUG(10,("schedule_aio_read_and_X: malloc fail.\n"));
return NT_STATUS_NO_MEMORY;
}
aio_ex->handle_completion = handle_aio_read_complete;
construct_reply_common_req(smbreq, (char *)aio_ex->outbuf.data);
srv_set_message((char *)aio_ex->outbuf.data, 12, 0, True);
SCVAL(aio_ex->outbuf.data,smb_vwv0,0xFF); /* Never a chained reply. */
init_strict_lock_struct(fsp, (uint64_t)smbreq->smbpid,
(uint64_t)startpos, (uint64_t)smb_maxcnt, READ_LOCK,
&aio_ex->lock);
/* Take the lock until the AIO completes. */
if (!SMB_VFS_STRICT_LOCK(conn, fsp, &aio_ex->lock)) {
TALLOC_FREE(aio_ex);
return NT_STATUS_FILE_LOCK_CONFLICT;
}
a = &aio_ex->acb;
/* Now set up the aio record for the read call. */
a->aio_fildes = fsp->fh->fd;
a->aio_buf = smb_buf(aio_ex->outbuf.data);
a->aio_nbytes = smb_maxcnt;
a->aio_offset = startpos;
a->aio_sigevent.sigev_notify = SIGEV_SIGNAL;
a->aio_sigevent.sigev_signo = RT_SIGNAL_AIO;
a->aio_sigevent.sigev_value.sival_ptr = aio_ex;
ret = SMB_VFS_AIO_READ(fsp, a);
if (ret == -1) {
DEBUG(0,("schedule_aio_read_and_X: aio_read failed. "
"Error %s\n", strerror(errno) ));
SMB_VFS_STRICT_UNLOCK(conn, fsp, &aio_ex->lock);
TALLOC_FREE(aio_ex);
return NT_STATUS_RETRY;
}
outstanding_aio_calls++;
aio_ex->smbreq = talloc_move(aio_ex, &smbreq);
DEBUG(10,("schedule_aio_read_and_X: scheduled aio_read for file %s, "
"offset %.0f, len = %u (mid = %u)\n",
fsp_str_dbg(fsp), (double)startpos, (unsigned int)smb_maxcnt,
(unsigned int)aio_ex->smbreq->mid ));
return NT_STATUS_OK;
}
