Documentation/fault-injection/fault-injection.rst

34   /sys/block/<device>/make-it-fail or
35   /sys/block/<device>/<partition>/make-it-fail. (submit_bio_noacct())
40   debugfs entries under /sys/kernel/debug/mmc0/fail_mmc_request
46   under /sys/kernel/debug/fail_function. No boot option supported.
51   debugfs entries under /sys/kernel/debug/nvme*/fault_inject. The default
58   /sys/kernel/config/nullb/<disk>/timeout_inject,
60   /sys/kernel/config/nullb/<disk>/requeue_inject, and
62   /sys/kernel/config/nullb/<disk>/init_hctx_fault_inject.
73 - /sys/kernel/debug/fail*/probability:
81 	/sys/kernel/debug/fail*/interval for such testcases.
83 - /sys/kernel/debug/fail*/interval:
91 - /sys/kernel/debug/fail*/times:
96 - /sys/kernel/debug/fail*/space:
102 - /sys/kernel/debug/fail*/verbose
111 - /sys/kernel/debug/fail*/task-filter:
119 - /sys/kernel/debug/fail*/require-start,
120   /sys/kernel/debug/fail*/require-end,
121   /sys/kernel/debug/fail*/reject-start,
122   /sys/kernel/debug/fail*/reject-end:
131 - /sys/kernel/debug/fail*/stacktrace-depth:
137 - /sys/kernel/debug/fail_page_alloc/ignore-gfp-highmem:
144 - /sys/kernel/debug/failslab/cache-filter
150         Select the cache by writing '1' to /sys/kernel/slab/<cache>/failslab:
152 - /sys/kernel/debug/failslab/ignore-gfp-wait:
153 - /sys/kernel/debug/fail_page_alloc/ignore-gfp-wait:
160 - /sys/kernel/debug/fail_page_alloc/min-order:
165 - /sys/kernel/debug/fail_futex/ignore-private:
172 - /sys/kernel/debug/fail_sunrpc/ignore-client-disconnect:
179 - /sys/kernel/debug/fail_sunrpc/ignore-server-disconnect:
186 - /sys/kernel/debug/fail_sunrpc/ignore-cache-wait:
193 - /sys/kernel/debug/fail_function/inject:
202 - /sys/kernel/debug/fail_function/injectable:
211 - /sys/kernel/debug/fail_function/<function-name>/retval:
363     echo Y > /sys/kernel/debug/$FAILTYPE/task-filter
364     echo 10 > /sys/kernel/debug/$FAILTYPE/probability
365     echo 100 > /sys/kernel/debug/$FAILTYPE/interval
366     echo -1 > /sys/kernel/debug/$FAILTYPE/times
367     echo 0 > /sys/kernel/debug/$FAILTYPE/space
368     echo 2 > /sys/kernel/debug/$FAILTYPE/verbose
369     echo Y > /sys/kernel/debug/$FAILTYPE/ignore-gfp-wait
408     if [ ! -d /sys/module/$module/sections ]
414     cat /sys/module/$module/sections/.text > /sys/kernel/debug/$FAILTYPE/require-start
415     cat /sys/module/$module/sections/.data > /sys/kernel/debug/$FAILTYPE/require-end
417     echo N > /sys/kernel/debug/$FAILTYPE/task-filter
418     echo 10 > /sys/kernel/debug/$FAILTYPE/probability
419     echo 100 > /sys/kernel/debug/$FAILTYPE/interval
420     echo -1 > /sys/kernel/debug/$FAILTYPE/times
421     echo 0 > /sys/kernel/debug/$FAILTYPE/space
422     echo 2 > /sys/kernel/debug/$FAILTYPE/verbose
423     echo Y > /sys/kernel/debug/$FAILTYPE/ignore-gfp-wait
424     echo Y > /sys/kernel/debug/$FAILTYPE/ignore-gfp-highmem
425     echo 10 > /sys/kernel/debug/$FAILTYPE/stacktrace-depth
427     trap "echo 0 > /sys/kernel/debug/$FAILTYPE/probability" SIGINT SIGTERM EXIT
446     echo $FAILFUNC > /sys/kernel/debug/$FAILTYPE/inject
447     printf %#x -12 > /sys/kernel/debug/$FAILTYPE/$FAILFUNC/retval
448     echo N > /sys/kernel/debug/$FAILTYPE/task-filter
449     echo 100 > /sys/kernel/debug/$FAILTYPE/probability
450     echo 0 > /sys/kernel/debug/$FAILTYPE/interval
451     echo -1 > /sys/kernel/debug/$FAILTYPE/times
452     echo 0 > /sys/kernel/debug/$FAILTYPE/space
453     echo 1 > /sys/kernel/debug/$FAILTYPE/verbose
464     echo > /sys/kernel/debug/$FAILTYPE/inject
475     echo 1 > /sys/kernel/slab/skbuff_head_cache/failslab
477     echo 1 > /sys/kernel/debug/failslab/cache-filter
479     echo 1 > /sys/kernel/debug/failslab/times
480     echo 1 > /sys/kernel/debug/failslab/probability
517   #include <sys/types.h>
518   #include <sys/stat.h>
519   #include <sys/socket.h>
520   #include <sys/syscall.h>
533 	system("echo N > /sys/kernel/debug/failslab/ignore-gfp-wait");