Gleb Chesnokov
e4a191c109
Manual review found that isert_poll_cq forms &cq->wc[err] when ib_poll_cq returns a negative errno. This pointer formation already indexes outside the completion array, even if the following loop does not dereference it. No saved analyzer diagnostic directly reports it. Stop on nonpositive results before forming the end pointer and preserve the result for the caller. Keep the loop exit next to the poll result. Add the scst-ISER-cq KUnit suite to isert-scst.ko. Call the production polling function with a private ib_device poll callback and task-local stubs for the success and error completion handlers. Cover initial -EIO and -EINVAL results, an empty queue, full and short batches, and an error after completions. Check poll termination, completion order and dispatch to the correct handler. Negative-result cases also exercise kernel UBSAN bounds checking when CONFIG_UBSAN_BOUNDS is enabled. Include iSER in the existing KUnit module inventory and build it after iscsi-scst with the RDMA compatibility probes. Propagate the common KUnit flags through ordinary iSER builds as well, so analyzer builds include the suite. Extend tooling checks for module selection, dependency order, cleanup, private headers and in-tree source export.
Overview
This is the source code repository of the SCST project. SCST is a collection of Linux kernel drivers that implement SCSI target functionality. The SCST project includes:
- The SCST core in the scst/ subdirectory.
- A tool for loading, saving and modifying the SCST configuration in directory scstadmin/.
- Several SCSI target drivers in the directories iscsi-scst/, qla2x00t-32gbit/, qla2x00t/, srpt/, scst_local/ and fcst/.
- User space programs in the usr/ subdirectory, e.g. fileio_tgt.
- Various documentation in the doc/ subdirectory.
Documentation
- Building and installing SCST.
- Build options: Clang, cross-compilation, and kernel module signing.
- Configuration and administration: targets, devices,
LUNs, and
/etc/scst.conf. - Core and device handlers: operating modes, module parameters, and sysfs configuration.
- Target drivers: iSCSI, iSER, QLogic Fibre Channel, SRP, FCoE, and local loopback.
- Performance tuning.
- Clustered persistent reservations: synchronization through DLM.
- T10 protection information: data integrity modes and configuration.
- Developer references: architecture and userspace handler interface (SGML sources), and sysfs interface rules.
- Contributing: code style, commit conventions, local checks, and guides to KUnit and component testing.
Current master packages
Prebuilt x86_64 packages from the latest successfully published master
build are available in the rolling
master-rpm prerelease.
These are development snapshots, not SCST releases.
The snapshot contains RPM bundles for selected Rocky Linux and Oracle Linux
UEK kernels. It also contains Ubuntu LTS bundles with scst-dkms, scstadmin
and iscsi-scst binary packages and their Debian source package files. Exact
distribution releases and RPM kernel versions are included in the asset names.
Every .tar.gz bundle has a matching .sha256 file. The complete snapshot is
replaced after each successful package workflow for the current master
commit.
QLogic target driver
Two QLogic target drivers are included in the SCST project.
The default driver is located in the qla2x00t-32gbit directory. It is the newer one.
May anyone wish to switch back to the older driver that only supported up to
16 Gb/s adapters, it is located in qla2x00t directory. To make use of the
older driver build scst with environment variable QLA_32GBIT=no set.
Vladislav Bolkhovitin vst@vlnb.net, http://scst.sourceforge.net
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