/* struct smbd_smb2_read_state destructor. Send the SMB2_READ data. */
static int smb2_sendfile_send_data(struct smbd_smb2_read_state *state)
{
struct lock_struct lock;
uint32_t in_length = state->in_length;
uint64_t in_offset = state->in_offset;
files_struct *fsp = state->fsp;
ssize_t nread;
nread = SMB_VFS_SENDFILE(fsp->conn->sconn->sock,
fsp,
NULL,
in_offset,
in_length);
DEBUG(10,("smb2_sendfile_send_data: SMB_VFS_SENDFILE returned %d on file %s\n",
(int)nread,
fsp_str_dbg(fsp) ));
if (nread == -1) {
if (errno == ENOSYS || errno == EINTR) {
/*
* Special hack for broken systems with no working
* sendfile. Fake this up by doing read/write calls.
*/
set_use_sendfile(SNUM(fsp->conn), false);
nread = fake_sendfile(fsp, in_offset, in_length);
if (nread == -1) {
DEBUG(0,("smb2_sendfile_send_data: "
"fake_sendfile failed for "
"file %s (%s).\n",
fsp_str_dbg(fsp),
strerror(errno)));
exit_server_cleanly("smb2_sendfile_send_data: "
"fake_sendfile failed");
}
goto out;
}
DEBUG(0,("smb2_sendfile_send_data: sendfile failed for file "
"%s (%s). Terminating\n",
fsp_str_dbg(fsp),
strerror(errno)));
exit_server_cleanly("smb2_sendfile_send_data: sendfile failed");
} else if (nread == 0) {
/*
* Some sendfile implementations return 0 to indicate
* that there was a short read, but nothing was
* actually written to the socket. In this case,
* fallback to the normal read path so the header gets
* the correct byte count.
*/
DEBUG(3, ("send_file_readX: sendfile sent zero bytes "
"falling back to the normal read: %s\n",
fsp_str_dbg(fsp)));
nread = fake_sendfile(fsp, in_offset, in_length);
if (nread == -1) {
DEBUG(0,("smb2_sendfile_send_data: "
"fake_sendfile failed for file "
"%s (%s). Terminating\n",
fsp_str_dbg(fsp),
strerror(errno)));
exit_server_cleanly("smb2_sendfile_send_data: "
"fake_sendfile failed");
}
}
out:
if (nread < in_length) {
sendfile_short_send(fsp, nread, 0, in_length);
}
init_strict_lock_struct(fsp,
state->in_file_id_volatile,
in_offset,
in_length,
READ_LOCK,
&lock);
SMB_VFS_STRICT_UNLOCK(fsp->conn, fsp, &lock);
return 0;
}
/* struct smbd_smb2_read_state destructor. Send the SMB2_READ data. */
static int smb2_sendfile_send_data(struct smbd_smb2_read_state *state)
{
struct lock_struct lock;
uint32_t in_length = state->in_length;
uint64_t in_offset = state->in_offset;
files_struct *fsp = state->fsp;
const DATA_BLOB *hdr = state->smb2req->queue_entry.sendfile_header;
NTSTATUS *pstatus = state->smb2req->queue_entry.sendfile_status;
struct smbXsrv_connection *xconn = state->smb2req->xconn;
ssize_t nread;
ssize_t ret;
int saved_errno;
nread = SMB_VFS_SENDFILE(xconn->transport.sock,
fsp,
hdr,
in_offset,
in_length);
DEBUG(10,("smb2_sendfile_send_data: SMB_VFS_SENDFILE returned %d on file %s\n",
(int)nread,
fsp_str_dbg(fsp) ));
if (nread == -1) {
saved_errno = errno;
/*
* Returning ENOSYS means no data at all was sent.
Do this as a normal read. */
if (errno == ENOSYS) {
goto normal_read;
}
if (errno == EINTR) {
/*
* Special hack for broken Linux with no working sendfile. If we
* return EINTR we sent the header but not the rest of the data.
* Fake this up by doing read/write calls.
*/
set_use_sendfile(SNUM(fsp->conn), false);
nread = fake_sendfile(xconn, fsp, in_offset, in_length);
if (nread == -1) {
saved_errno = errno;
DEBUG(0,("smb2_sendfile_send_data: fake_sendfile "
"failed for file %s (%s) for client %s. "
"Terminating\n",
fsp_str_dbg(fsp), strerror(saved_errno),
smbXsrv_connection_dbg(xconn)));
*pstatus = map_nt_error_from_unix_common(saved_errno);
return 0;
}
goto out;
}
DEBUG(0,("smb2_sendfile_send_data: sendfile failed for file "
"%s (%s) for client %s. Terminating\n",
fsp_str_dbg(fsp), strerror(saved_errno),
smbXsrv_connection_dbg(xconn)));
*pstatus = map_nt_error_from_unix_common(saved_errno);
return 0;
} else if (nread == 0) {
/*
* Some sendfile implementations return 0 to indicate
* that there was a short read, but nothing was
* actually written to the socket. In this case,
* fallback to the normal read path so the header gets
* the correct byte count.
*/
DEBUG(3, ("send_file_readX: sendfile sent zero bytes "
"falling back to the normal read: %s\n",
fsp_str_dbg(fsp)));
goto normal_read;
}
/*
* We got a short read
*/
goto out;
normal_read:
/* Send out the header. */
ret = write_data(xconn->transport.sock,
(const char *)hdr->data, hdr->length);
if (ret != hdr->length) {
saved_errno = errno;
DEBUG(0,("smb2_sendfile_send_data: write_data failed for file "
"%s (%s) for client %s. Terminating\n",
fsp_str_dbg(fsp), strerror(saved_errno),
smbXsrv_connection_dbg(xconn)));
*pstatus = map_nt_error_from_unix_common(saved_errno);
return 0;
}
nread = fake_sendfile(xconn, fsp, in_offset, in_length);
if (nread == -1) {
saved_errno = errno;
DEBUG(0,("smb2_sendfile_send_data: fake_sendfile "
"failed for file %s (%s) for client %s. "
"Terminating\n",
fsp_str_dbg(fsp), strerror(saved_errno),
smbXsrv_connection_dbg(xconn)));
*pstatus = map_nt_error_from_unix_common(saved_errno);
return 0;
}
out:
if (nread < in_length) {
ret = sendfile_short_send(xconn, fsp, nread,
hdr->length, in_length);
if (ret == -1) {
saved_errno = errno;
DEBUG(0,("%s: sendfile_short_send "
"failed for file %s (%s) for client %s. "
"Terminating\n",
__func__,
fsp_str_dbg(fsp), strerror(saved_errno),
smbXsrv_connection_dbg(xconn)));
*pstatus = map_nt_error_from_unix_common(saved_errno);
return 0;
}
}
init_strict_lock_struct(fsp,
fsp->op->global->open_persistent_id,
in_offset,
in_length,
READ_LOCK,
&lock);
SMB_VFS_STRICT_UNLOCK(fsp->conn, fsp, &lock);
*pstatus = NT_STATUS_OK;
return 0;
}