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| author | Akinobu Mita <akinobu.mita@gmail.com> | 2023-03-27 23:37:33 +0900 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2023-04-13 07:38:55 -0600 |
| commit | bb4c19e030f45c5416f1eb4daa94fbaf7165e9ea (patch) | |
| tree | 9be9082ef9a9633d70b4055c73a9dd7edc238212 /Documentation/fault-injection | |
| parent | 4668c7a2940d134bea50058e138591b97485c5da (diff) | |
| download | linux-bb4c19e030f45c5416f1eb4daa94fbaf7165e9ea.tar.gz | |
block: null_blk: make fault-injection dynamically configurable per device
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>
Diffstat (limited to 'Documentation/fault-injection')
| -rw-r--r-- | Documentation/fault-injection/fault-injection.rst | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/Documentation/fault-injection/fault-injection.rst b/Documentation/fault-injection/fault-injection.rst index 08e420e109739f..b64809514b0f78 100644 --- a/Documentation/fault-injection/fault-injection.rst +++ b/Documentation/fault-injection/fault-injection.rst @@ -52,6 +52,14 @@ Available fault injection capabilities status code is NVME_SC_INVALID_OPCODE with no retry. The status code and retry flag can be set via the debugfs. +- Null test block driver fault injection + + inject IO timeouts by setting config items under + /sys/kernel/config/nullb/<disk>/timeout_inject, + inject requeue requests by setting config items under + /sys/kernel/config/nullb/<disk>/requeue_inject, and + inject init_hctx() errors by setting config items under + /sys/kernel/config/nullb/<disk>/init_hctx_fault_inject. Configure fault-injection capabilities behavior ----------------------------------------------- |