Support for the ib_srpt_target_<n> target port names was removed in 2015.
Update the documentation that still uses this target port name format.
Remove all references to the obsolete ib_srpt kernel module parameters
use_port_guid_in_session_name and use_node_guid_in_target_name. Remove
the references from srpt/README to target port name formats that are no
longer supported.
Change '---help---' into 'help'. See also Linux kernel commit f70f74d15ca8
("kconfig: remove '---help---' support") # v5.9.
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The previous commit removed support for building with clang. Restore support
for building with clang without breaking cross-compilation support.
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Use a workqueue for processing RDMA completions instead of creating one
kernel thread per RDMA channel. This change improves performance if the
number of RDMA channels is large by reducing the number of context
switches between kernel threads while processing RDMA completions. An
additional change is that srpt_set_ch_state() no longer wakes up the
RDMA completion context but that srpt_cm_rtu_recv() wakes up the RDMA
completion context instead.
See also https://github.com/bvanassche/scst/issues/33 .
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- Return EOPNOTSUPP instead of ENOTSUPP to user space.
- Do not terminate macro definitions with a trailing semicolon.
- Do not initialize static variables to zero.
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The latter name reflects better the role of this variable. Remove the
CPPFLAGS assignment from srpt/src/Kbuild because it is not useful.
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Since not all kernel header files are compatible with -Wextra, remove -Wextra.
To enable -Wextra, build SCST with W=1.
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Add -Wno-deprecated-declarations to the compiler flags for RHEL and CentOS.
Save the output of the build process such that it can be inspected easily.
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$(KBUILD_EXTRA_SYMBOLS) is not only used at compile time but also at link
time. Move the $(KBUILD_EXTRA_SYMBOLS) definitions such that it is
available both at compile time and at link time.
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While $(src) is always defined, $(KBUILD_EXTMOD) is only defined when
building code as an external module.
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Running fio at the initiator side with buffer size 1 MiB and when using
direct I/O triggers the following error with a ConnectX-3 and Linux kernel
v4.19 or later or CentOS 7.7 or later at the target side:
ib_srpt: RDMA t 4 for idx 20 failed with status 5. If this has not been triggered by a cable pull, please check the involved IB HCA's and cables.
This was observed with firmware version 2.42.5000 but this is probably
independent of the firmware version. Fix this by reducing the send SGE QP
limit. This patch increases ch->max_recv_sge for older kernel versions.
Reported-by: Chesnokov Gleb <Chesnokov.G@raidix.com>
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The path_rec pointer is set for IB and RoCE logins but not for iWARP
logins. Hence check the path_rec pointer before dereferencing it.
See also upstream commit cbca2442a096 ("RDMA/srpt: Fix handling of iWARP
logins") # v5.5.
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The scst_user device handler allocates its own data buffers. If ib_srpt
uses zero-copy mode, copy data as required between the device handler and
zero-copy buffer.
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