d95d559950
Backport ipxe to support FirstBurstLength OBS-URL: https://build.opensuse.org/request/show/501556 OBS-URL: https://build.opensuse.org/package/show/Virtualization/qemu?expand=0&rev=344
80 lines
3.1 KiB
Diff
80 lines
3.1 KiB
Diff
From 08a98a925917dc2445d098c3ce9a2d2d8b8acda4 Mon Sep 17 00:00:00 2001
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From: Michael Brown <mcb30@ipxe.org>
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Date: Wed, 3 May 2017 13:01:11 +0100
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Subject: [PATCH 2/2] [iscsi] Always send FirstBurstLength parameter
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As of kernel 4.11, the LIO target will propose a value for
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FirstBurstLength if the initiator did not do so. This is entirely
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redundant in our case, since FirstBurstLength is defined by RFC 3720
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to be
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"Irrelevant when: ( InitialR2T=Yes and ImmediateData=No )"
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and we already enforce both InitialR2T=Yes and ImmediateData=No in our
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initial proposal. However, LIO (arguably correctly) complains when we
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do not respond to its redundant proposal of an already-irrelevant
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value.
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Fix by always proposing the default value for FirstBurstLength.
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Debugged-by: Patrick Seeburger <info@8bit.de>
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Tested-by: Patrick Seeburger <info@8bit.de>
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Signed-off-by: Michael Brown <mcb30@ipxe.org>
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[BR: BSC#1040476]
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Signed-off-by: Liang Yan <lyan@suse.com>
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---
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src/net/tcp/iscsi.c | 14 ++++++++++----
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1 file changed, 10 insertions(+), 4 deletions(-)
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diff --git a/src/net/tcp/iscsi.c b/src/net/tcp/iscsi.c
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index 6da8570c..aa30efda 100644
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--- a/src/net/tcp/iscsi.c
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+++ b/src/net/tcp/iscsi.c
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@@ -434,12 +434,12 @@ static int iscsi_tx_data_out ( struct iscsi_session *iscsi ) {
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*
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* HeaderDigest=None
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* DataDigest=None
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- * MaxConnections is irrelevant; we make only one connection anyway [4]
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+ * MaxConnections=1 (irrelevant; we make only one connection anyway) [4]
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* InitialR2T=Yes [1]
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- * ImmediateData is irrelevant; we never send immediate data [4]
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+ * ImmediateData=No (irrelevant; we never send immediate data) [4]
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* MaxRecvDataSegmentLength=8192 (default; we don't care) [3]
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* MaxBurstLength=262144 (default; we don't care) [3]
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- * FirstBurstLength=262144 (default; we don't care)
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+ * FirstBurstLength=65536 (irrelevant due to other settings) [5]
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* DefaultTime2Wait=0 [2]
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* DefaultTime2Retain=0 [2]
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* MaxOutstandingR2T=1
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@@ -464,6 +464,11 @@ static int iscsi_tx_data_out ( struct iscsi_session *iscsi ) {
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* these parameters, but some targets (notably a QNAP TS-639Pro) fail
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* unless they are supplied, so we explicitly specify the default
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* values.
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+ *
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+ * [5] FirstBurstLength is defined to be irrelevant since we already
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+ * force InitialR2T=Yes and ImmediateData=No, but some targets
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+ * (notably LIO as of kernel 4.11) fail unless it is specified, so we
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+ * explicitly specify the default value.
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*/
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static int iscsi_build_login_request_strings ( struct iscsi_session *iscsi,
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void *data, size_t len ) {
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@@ -526,13 +531,14 @@ static int iscsi_build_login_request_strings ( struct iscsi_session *iscsi,
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"ImmediateData=No%c"
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"MaxRecvDataSegmentLength=8192%c"
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"MaxBurstLength=262144%c"
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+ "FirstBurstLength=65536%c"
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"DefaultTime2Wait=0%c"
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"DefaultTime2Retain=0%c"
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"MaxOutstandingR2T=1%c"
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"DataPDUInOrder=Yes%c"
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"DataSequenceInOrder=Yes%c"
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"ErrorRecoveryLevel=0%c",
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- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 );
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+ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 );
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}
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return used;
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--
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2.13.0
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