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The null_blk driver has multiple driver-specific fault injection mechanisms. Each fault injection configuration can only be specified by a module parameter and cannot be reconfigured without reloading the driver. Also, each configuration is common to all devices and is initialized every time a new device is added. This change adds the following subdirectories for each null_blk device. /sys/kernel/config/nullb/<disk>/timeout_inject /sys/kernel/config/nullb/<disk>/requeue_inject /sys/kernel/config/nullb/<disk>/init_hctx_fault_inject Each fault injection attribute can be dynamically set per device by a corresponding file in these directories. Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Link: https://lore.kernel.org/r/20230327143733.14599-3-akinobu.mita@gmail.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
12 lines
317 B
Text
12 lines
317 B
Text
# SPDX-License-Identifier: GPL-2.0
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#
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# Null block device driver configuration
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#
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config BLK_DEV_NULL_BLK
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tristate "Null test block driver"
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select CONFIGFS_FS
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config BLK_DEV_NULL_BLK_FAULT_INJECTION
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bool "Support fault injection for Null test block driver"
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depends on BLK_DEV_NULL_BLK && FAULT_INJECTION_CONFIGFS
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