diff options
| 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 /drivers/block/null_blk/null_blk.h | |
| parent | fault-inject: allow configuration via configfs (diff) | |
| download | linux-bb4c19e030f45c5416f1eb4daa94fbaf7165e9ea.tar.gz linux-bb4c19e030f45c5416f1eb4daa94fbaf7165e9ea.zip | |
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 'drivers/block/null_blk/null_blk.h')
| -rw-r--r-- | drivers/block/null_blk/null_blk.h | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/drivers/block/null_blk/null_blk.h b/drivers/block/null_blk/null_blk.h index eb5972c50be8..929f659dd255 100644 --- a/drivers/block/null_blk/null_blk.h +++ b/drivers/block/null_blk/null_blk.h @@ -69,7 +69,12 @@ enum { struct nullb_device { struct nullb *nullb; - struct config_item item; + struct config_group group; +#ifdef CONFIG_BLK_DEV_NULL_BLK_FAULT_INJECTION + struct fault_config timeout_config; + struct fault_config requeue_config; + struct fault_config init_hctx_fault_config; +#endif struct radix_tree_root data; /* data stored in the disk */ struct radix_tree_root cache; /* disk cache data */ unsigned long flags; /* device flags */ |