cxgbei needs the ability to return different limits based on the
connection (e.g. if the connection is over a T5 adapter or a T6
adapter as well as factoring in the MTU).
This change plumbs through the changes in the ioctls without changing
any of the backends. The limits callback passed to icl_register now
accepts a second socket argument which holds the integer file
descriptor. To support ABI compatiblity for old binaries, the
callback should return "global" values if the socket fd is zero.
The CTL_ISCSI_LIMITS argument used with CTL_ISCSI by ctld(8) now
accepts the socket fd in a field that was previously part of a
reserved spare field. Old binaries zero this request which results in
passing a socket fd of 0 to the limits callback.
The ISCSIDREQUEST ioctl no longer returns limits. Instead, iscsid(8)
invokes a new ISCSIDLIMITS ioctl after establishing the connection via
connect(2). For ABI compat, if the old ISCSIDREQUEST is invoked, the
global limits are still fetched (with a socket fd of 0) and returned.
Reviewed by: mav
Sponsored by: Chelsio Communications
Differential Revision: https://reviews.freebsd.org/D34928
This reduces duplication in the two lists and makes it clearer which
ioctls are needed in the ICL_KERNEL_PROXY case.
Reviewed by: mav
Sponsored by: Chelsio Communications
Differential Revision: https://reviews.freebsd.org/D34927
The OID "kern.iscsi.login_timeout" references an integer and
not a string.
Sponsored by: NetApp, Inc.
Differential Revision: https://reviews.freebsd.org/D34380
Add per-Session configurable ping (SCSI NOP) and login timeouts.
Remove the torn down, old iSCSI session quickly, when performing a reconnect.
Reviewed By: trasz
Sponsored by: NetApp, Inc.
Differential Revision: https://reviews.freebsd.org/D34198
Text requests and responses can span multiple PDUs. In that case, the
sender sets the Continue bit in non-final PDUs and the Final bit in
the last PDU. The receiver responds to non-final PDUs with an empty
text PDU.
To support this, add a more abstract API in libiscsi which accepts and
receives key sets rather than PDUs. These routines internally send or
receive one or more PDUs. Use these new functions to replace the
handling of TextRequest and TextResponse PDUs in discovery sessions in
both ctld and iscsid.
Note that there is not currently a use case for large Text requests
and those are still always sent as a single PDU. However, discovery
sessions can return a text response listing targets that spans
multiple PDUs, so the new API supports sending and receiving multi-PDU
responses.
Reported by: Jithesh Arakkan @ Chelsio
Reviewed by: mav
Sponsored by: Chelsio Communications
Differential Revision: https://reviews.freebsd.org/D33548
If a "raw" IPv6 address (denoted by a leading '[') is used as a target
address, then 'arg' is incremented by one to skip over the '['.
However, this meant that at the end of the function the wrong address
was passed to free(). With malloc junking enabled and given suitably
small strings, malloc() would happily overwrite the correct number of
bytes with junk, but off by one byte overwriting the byte after the
allocation.
This manifested as the first byte of the 'HeaderDigest' key being
overwritten causing the key name on the wire to be sent as
'\x5eaderDigest' which the target rejected.
Reported by: Jithesh Arakkan @ Chelsio
Found with: ASAN (via WITH_ASAN=yes)
Sponsored by: Chelsio Communications
This will be used in future changes to support large text requests
spanning multiple PDUs.
Provide wrapper functions keys_load/save_pdu that operate use a PDU's
data buffer.
Reviewed by: mav
Sponsored by: Chelsio Communications
Differential Revision: https://reviews.freebsd.org/D33547
Move some of the code duplicated between ctld(8) and iscsid(8) into a
libiscsiutil library.
Sharing the low-level PDU code did require having a
'struct connection' base class with a method table to permit separate
initiator vs target behavior (e.g. in handling proxy PDUs).
Reviewed by: mav, emaste
Sponsored by: Chelsio Communications
Differential Revision: https://reviews.freebsd.org/D33544
Previously we updated the conection's conn_max_recv_data_segment_length
only when we received a response containing MaxRecvDataSegmentLength
from the target. If the target did not send MaxRecvDataSegmentLength
then we left conn_max_recv_data_segment_length at the default (i.e.,
8192). A target could then send more data than that defult (up to our
advertised maximum), and we would drop the connection.
RFC 7143 specifies that MaxRecvDataSegmentLength is Declarative, not
negotiated. Just set conn_max_recv_data_segment_length to our
advertised value in login_negotiate().
PR: 259355
Reviewed by: mav
MFC after: 1 week
Fixes: a15fbc904a ("Alike to r312190 decouple iSCSI...")
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D32605
Foundation copyrights, approved by emaste@. It does not include
files which carry other people's copyrights; if you're one
of those people, feel free to make similar change.
Reviewed by: emaste, imp, gbe (manpages)
Differential Revision: https://reviews.freebsd.org/D26980
Make the Ethernet PCP codepoint configurable
for L2 local traffic, to allow lower latency for
iSCSI block IO. This addresses the initiator
side only.
Reviewed by: mav, trasz, bcr
Sponsored by: NetApp, Inc.
Differential Revision: https://reviews.freebsd.org/D26739
It does not change anything immediately, but allows further support of
Command Priority, Status Qualifier and new task management functions.
MFC after: 1 month
Sponsored by: iXsystems, Inc.
Allow the DSCP codepoint also to be configurable
for the traffic in the direction from the initiator
to the target, such that writes and any requests
are also treated in the appropriate QoS class.
Reviewed by: mav
MFC after: 2 weeks
Sponsored by: NetApp, Inc.
Differential Revision: https://reviews.freebsd.org/D26714
the wrong length to strlcpy(3). It looks like it could overflow into
the next field, isc_user, which is properly long to accomodate for it;
I don't think it could cause any harm other than breaking the connection.
Reviewed by: mav
MFC after: 2 weeks
Sponsored by: NetApp, Inc.
Sponsored by: Klara, Inc.
Differential Revision: https://reviews.freebsd.org/D26247
Mainly focus on files that use BSD 2-Clause license, however the tool I
was using misidentified many licenses so this was mostly a manual - error
prone - task.
The Software Package Data Exchange (SPDX) group provides a specification
to make it easier for automated tools to detect and summarize well known
opensource licenses. We are gradually adopting the specification, noting
that the tags are considered only advisory and do not, in any way,
superceed or replace the license texts.
No functional change intended.
Connection parameters should remain at defaults until negotiated.
While there, remove sythetic limits, applied if kernel provided none.
iscsid has no own limitations, no configuration and no any idea what
values are good. Assume kernel knows what it requests.
Decouple the send and receive limits on the amount of data in a single
iSCSI PDU. MaxRecvDataSegmentLength is declarative, not negotiated, and
is direction-specific so there is no reason for both ends to limit
themselves to the same min(initiator, target) value in both directions.
Allow iSCSI drivers to report their send, receive, first burst, and max
burst limits explicitly instead of using hardcoded values or trying to
derive all of them from the receive limit (which was the only limit
reported by the drivers prior to this change).
Display the send and receive limits separately in the userspace iSCSI
utilities.
Reviewed by: jpaetzel@ (earlier version), trasz@
Sponsored by: Chelsio Communications
Differential Revision: https://reviews.freebsd.org/D7279
rework might be needed to support asymetrical limits, but this should be
ok for now.
Obtained from: Mellanox Technologies (earlier version)
MFC after: 1 month
Sponsored by: The FreeBSD Foundation
This is not properly respecting WITHOUT or ARCH dependencies in target/.
Doing so requires a massive effort to rework targets/ to do so. A
better approach will be to either include the SUBDIR Makefiles directly
and map to DIRDEPS or just dynamically lookup the SUBDIR. These lose
the benefit of having a userland/lib, userland/libexec, etc, though and
results in a massive package. The current implementation of targets/ is
very unmaintainable.
Currently rescue/rescue and sys/modules are still not connected.
Sponsored by: EMC / Isilon Storage Division
initiator iSCSI offload. Pass maximum data segment size supported by
chosen offload module to iscsid(8), and make iscsid(8) not try to negotiate
anything larger than that.
MFC after: 1 month
Sponsored by: The FreeBSD Foundation
While we don't support MCS, hole in received sequence numbers may mean
only PDU loss. While we don't support lost PDU recovery, terminate the
connection to avoid stuck commands.
While there, improve handling of sequence numbers wrap after 2^32 PDUs.
MFC after: 2 weeks
