From: Akinobu Mita <akinobu.mita@xxxxxxxxx> Subject: fault-inject: add /proc/<pid>/fail-nth fail-nth interface is only created in /proc/self/task/<current-tid>/. This change also adds it in /proc/<pid>/. This makes shell based tool a bit simpler. $ bash -c "builtin echo 100 > /proc/self/fail-nth && exec ls /" Link: http://lkml.kernel.org/r/1491490561-10485-6-git-send-email-akinobu.mita@xxxxxxxxx Signed-off-by: Akinobu Mita <akinobu.mita@xxxxxxxxx> Cc: Dmitry Vyukov <dvyukov@xxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- Documentation/fault-injection/fault-injection.txt | 3 ++- fs/proc/base.c | 1 + 2 files changed, 3 insertions(+), 1 deletion(-) diff -puN Documentation/fault-injection/fault-injection.txt~fault-inject-add-proc-pid-fail-nth Documentation/fault-injection/fault-injection.txt --- a/Documentation/fault-injection/fault-injection.txt~fault-inject-add-proc-pid-fail-nth +++ a/Documentation/fault-injection/fault-injection.txt @@ -136,7 +136,8 @@ use the boot option: o proc entries -- /proc/self/task/<current-tid>/fail-nth: +- /proc/<pid>/fail-nth: +- /proc/self/task/<tid>/fail-nth: Write to this file of integer N makes N-th call in the task fail. Read from this file returns a integer value. A value of '0' indicates diff -puN fs/proc/base.c~fault-inject-add-proc-pid-fail-nth fs/proc/base.c --- a/fs/proc/base.c~fault-inject-add-proc-pid-fail-nth +++ a/fs/proc/base.c @@ -2962,6 +2962,7 @@ static const struct pid_entry tgid_base_ #endif #ifdef CONFIG_FAULT_INJECTION REG("make-it-fail", S_IRUGO|S_IWUSR, proc_fault_inject_operations), + REG("fail-nth", 0644, proc_fail_nth_operations), #endif #ifdef CONFIG_ELF_CORE REG("coredump_filter", S_IRUGO|S_IWUSR, proc_coredump_filter_operations), _ -- To unsubscribe from this list: send the line "unsubscribe mm-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
