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https://github.com/ibm-s390-linux/s390-tools.git
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2dbaf9f991
Add second filter stage to the udev rules: only continue with the toolset, if the system uses s390x IPL and if the current re-IPL target is from FCP. For the test, whether the next re-IPL target is planned to be done from FCP, a helper `chreipl-fcp-mpath-is-reipl-zfcp` is added, and the information in /sys/firmware/reipl/reipl_type is used. If either one or both of the tests are not true, the udev rules will exit. For debugging, the toolset can be built with the Make variable `D` set to 1 (e.g.: make D=1; make install D=1). This causes the toolset to write shell traces of the helper to $(DEBUGOUTDIR) (per default: /run/udev); otherwise no output is generated. `dbginfo.sh` will be changed to collect this data automatically. Reviewed-by: Steffen Maier <maier@linux.ibm.com> Signed-off-by: Benjamin Block <bblock@linux.ibm.com> Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>
26 lines
702 B
Bash
26 lines
702 B
Bash
#!/bin/bash
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# SPDX-License-Identifier: MIT
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#
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# chreipl-fcp-mpath: use multipath information to change FCP IPL target
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# (C) Copyright IBM Corp. 2021
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#
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# Uses the following system-utilities (and shell-builtins):
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# Those necessary for sourced library:
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# - chreipl-fcp-mpath-common.sh
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# Find out whether ReIPL is gonna happen from a SCSI volume attached via zFCP
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# shellcheck disable=SC2034
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declare -gr debug_trace_tag=00iriz
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# shellcheck disable=SC1091
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source '@chreiplzfcpmp-lib@' || exit 127
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declare reipl_type
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{ read -r reipl_type _ < /sys/firmware/reipl/reipl_type; } 2>/dev/null || exit 1
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if '@DEBUG@'; then declare -p reipl_type 1>&2; fi
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[ "${reipl_type}" = "fcp" ] || exit 2
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exit 0
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