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| author | Akinobu Mita | 2017-07-14 23:50:00 +0200 |
|---|---|---|
| committer | Linus Torvalds | 2017-07-15 00:05:13 +0200 |
| commit | 168c42bc56d8d47f67f2a5206506cd4ba3c18475 (patch) | |
| tree | 7e82690179b0b796505e493452f04c60df3613d9 | |
| parent | fault-inject: simplify access check for fail-nth (diff) | |
| download | kernel-qcow2-linux-168c42bc56d8d47f67f2a5206506cd4ba3c18475.tar.gz kernel-qcow2-linux-168c42bc56d8d47f67f2a5206506cd4ba3c18475.tar.xz kernel-qcow2-linux-168c42bc56d8d47f67f2a5206506cd4ba3c18475.zip | |
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@gmail.com
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | Documentation/fault-injection/fault-injection.txt | 3 | ||||
| -rw-r--r-- | fs/proc/base.c | 1 |
2 files changed, 3 insertions, 1 deletions
diff --git a/Documentation/fault-injection/fault-injection.txt b/Documentation/fault-injection/fault-injection.txt index 370ddcbc2b44..918972babcd8 100644 --- a/Documentation/fault-injection/fault-injection.txt +++ b/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 --git a/fs/proc/base.c b/fs/proc/base.c index 872a3f28bfe4..719c2e943ea1 100644 --- a/fs/proc/base.c +++ b/fs/proc/base.c @@ -2962,6 +2962,7 @@ static const struct pid_entry tgid_base_stuff[] = { #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), |