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lib/iscsi: Check data segment length separately for login request

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During login processing, only login request is accepted. So we
can move data segment length check from iscsi_check_data_segment_length()
to iscsi_op_login().

A few patches from this will inline data segment length check into
each opcode handler and then remove iscsi_check_data_segment_length().

Signed-off-by: Shuhei Matsumoto <shuhei.matsumoto.xt@hitachi.com>
Change-Id: I527ab27e8e0d69a067839b47635584d5262b0e49
Reviewed-on: https://review.gerrithub.io/c/spdk/spdk/+/470723
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Ben Walker <benjamin.walker@intel.com>
Reviewed-by: Jim Harris <james.r.harris@intel.com>
Reviewed-by: Paul Luse <paul.e.luse@intel.com>
Reviewed-by: Changpeng Liu <changpeng.liu@intel.com>
This commit is contained in:
Shuhei Matsumoto 2019-10-08 14:15:00 +09:00 committed by Changpeng Liu
parent f93770c25d
commit f8f49eba51
1 changed files with 9 additions and 8 deletions
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17
lib/iscsi/iscsi.c
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@ -376,7 +376,7 @@ static bool
iscsi_check_data_segment_length(struct spdk_iscsi_conn *conn,
struct spdk_iscsi_pdu *pdu, int data_len)
{
int max_segment_len;
int max_segment_len = 0;
/*
* Determine the maximum segment length expected for this PDU.
@ -391,13 +391,7 @@ iscsi_check_data_segment_length(struct spdk_iscsi_conn *conn,
* at runtime.
*/
if (conn->sess == NULL) {
/*
* If the connection does not yet have a session, then
* login is not complete and we use the 8KB default
* FirstBurstLength as our maximum data segment length
* value.
*/
max_segment_len = SPDK_ISCSI_FIRST_BURST_LENGTH;
return true;
} else if (pdu->bhs.opcode == ISCSI_OP_SCSI_DATAOUT ||
pdu->bhs.opcode == ISCSI_OP_NOPOUT) {
max_segment_len = SPDK_ISCSI_MAX_RECV_DATA_SEGMENT_LENGTH;
@ -2197,6 +2191,13 @@ iscsi_op_login(struct spdk_iscsi_conn *conn, struct spdk_iscsi_pdu *pdu)
return SPDK_ISCSI_CONNECTION_FATAL;
}
/* During login processing, use the 8KB default FirstBurstLength as
* our maximum data segment length value.
*/
if (pdu->data_segment_len > SPDK_ISCSI_FIRST_BURST_LENGTH) {
return iscsi_reject(conn, pdu, ISCSI_REASON_PROTOCOL_ERROR);
}
rsp_pdu = spdk_get_pdu();
if (rsp_pdu == NULL) {
return SPDK_ISCSI_CONNECTION_FATAL;