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This patch should fix the following bug: iscsi-scst: ***ERROR***: Sending data failed: initiator ..., write_size 0, write_state 1, res 0 iscsi-scst: ***CRITICAL ERROR***: 0 6 31 ------------[ cut here ]------------ kernel BUG at /usr/src/packages/BUILD/scst-3.7.0.8695/iscsi-scst/kernel/nthread.c:1517! invalid opcode: 0000 [#1] SMP NOPTI CPU: 12 PID: 997595 Comm: iscsiwr0_14 ... ... RIP: 0010:iscsi_send+0x877/0x8b0 [iscsi_scst] Call Trace: istwr+0x123/0x3b0 [iscsi_scst] kthread+0x120/0x136 ret_from_fork+0x24/0x36 ------------------------------------- What happens: - istwr() calls scst_do_job_wr(). - scst_do_job_wr() calls iscsi_send(). - iscsi_send() sets the 'res' variable to 0 during error in one of three possible places: iscsi_do_send(), tx_padding(), tx_ddigest(). - All of these functions call exit_tx() which sets conn->write_state to TX_END. - After iscsi_send() has completed for the current iteration, the next time it processes iscsi_conn with conn->write_state == TX_END, which will call BUG() in the switch default case. Therefore, remove the res == 0 check in iscsi_send() to handle TX_END state. Fixes: https://github.com/SCST-project/scst/issues/12
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/, srpt/, scst_local/ and fcst/.
- User space programs in the usr/ subdirectory, e.g. fileio_tgt.
- Various documentation in the doc/ subdirectory.
Instructions for building and installing SCST are available in the INSTALL.md file.
QLogic target driver
Two QLogic target drivers are included in the SCST project.
The default driver is located in qla2x00t-32gbit directory and it supports up to 32 Gb/s FC. 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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