static NTSTATUS schedule_smb2_sendfile_read(struct smbd_smb2_request *smb2req,
struct smbd_smb2_read_state *state)
{
struct smbd_smb2_read_state *state_copy = NULL;
files_struct *fsp = state->fsp;
/*
* We cannot use sendfile if...
* We were not configured to do so OR
* Signing is active OR
* This is a compound SMB2 operation OR
* fsp is a STREAM file OR
* We're using a write cache OR
* It's not a regular file OR
* Requested offset is greater than file size OR
* there's not enough data in the file.
* Phew :-). Luckily this means most
* reads on most normal files. JRA.
*/
if (!lp__use_sendfile(SNUM(fsp->conn)) ||
smb2req->do_signing ||
smb2req->in.vector_count != 4 ||
(fsp->base_fsp != NULL) ||
(fsp->wcp != NULL) ||
(!S_ISREG(fsp->fsp_name->st.st_ex_mode)) ||
(state->in_offset >= fsp->fsp_name->st.st_ex_size) ||
(fsp->fsp_name->st.st_ex_size < state->in_offset +
state->in_length)) {
return NT_STATUS_RETRY;
}
/* We've already checked there's this amount of data
to read. */
state->out_data.length = state->in_length;
state->out_remaining = 0;
/* Make a copy of state attached to the smb2req. Attach
the destructor here as this will trigger the sendfile
call when the request is destroyed. */
state_copy = talloc(smb2req, struct smbd_smb2_read_state);
if (!state_copy) {
return NT_STATUS_NO_MEMORY;
}
*state_copy = *state;
talloc_set_destructor(state_copy, smb2_sendfile_send_data);
return NT_STATUS_OK;
}
static NTSTATUS schedule_smb2_sendfile_read(struct smbd_smb2_request *smb2req,
struct smbd_smb2_read_state *state)
{
files_struct *fsp = state->fsp;
/*
* We cannot use sendfile if...
* We were not configured to do so OR
* Signing is active OR
* This is a compound SMB2 operation OR
* fsp is a STREAM file OR
* We're using a write cache OR
* It's not a regular file OR
* Requested offset is greater than file size OR
* there's not enough data in the file.
* Phew :-). Luckily this means most
* reads on most normal files. JRA.
*/
if (!lp__use_sendfile(SNUM(fsp->conn)) ||
smb2req->do_signing ||
smb2req->do_encryption ||
smb2req->in.vector_count >= (2*SMBD_SMB2_NUM_IOV_PER_REQ) ||
(fsp->base_fsp != NULL) ||
(fsp->wcp != NULL) ||
(!S_ISREG(fsp->fsp_name->st.st_ex_mode)) ||
(state->in_offset >= fsp->fsp_name->st.st_ex_size) ||
(fsp->fsp_name->st.st_ex_size < state->in_offset + state->in_length))
{
return NT_STATUS_RETRY;
}
/* We've already checked there's this amount of data
to read. */
state->out_data.length = state->in_length;
state->out_remaining = 0;
state->out_headers = data_blob_const(state->_out_hdr_buf,
sizeof(state->_out_hdr_buf));
return NT_STATUS_OK;
}
