457c899653991 (Thomas Gleixner 2019-05-19 13:08:55 +0100 1) // SPDX-License-Identifier: GPL-2.0-only
6ff1cb355e628 (Akinobu Mita 2006-12-08 02:39:43 -0800 2) #include <linux/kernel.h>
6ff1cb355e628 (Akinobu Mita 2006-12-08 02:39:43 -0800 3) #include <linux/init.h>
6ff1cb355e628 (Akinobu Mita 2006-12-08 02:39:43 -0800 4) #include <linux/random.h>
d43c36dc6b357 (Alexey Dobriyan 2009-10-07 17:09:06 +0400 5) #include <linux/sched.h>
6ff1cb355e628 (Akinobu Mita 2006-12-08 02:39:43 -0800 6) #include <linux/stat.h>
6ff1cb355e628 (Akinobu Mita 2006-12-08 02:39:43 -0800 7) #include <linux/types.h>
6ff1cb355e628 (Akinobu Mita 2006-12-08 02:39:43 -0800 8) #include <linux/fs.h>
8bc3bcc93a2b4 (Paul Gortmaker 2011-11-16 21:29:17 -0500 9) #include <linux/export.h>
f4f154fd920b2 (Akinobu Mita 2006-12-08 02:39:47 -0800 10) #include <linux/interrupt.h>
329409aeda064 (Akinobu Mita 2006-12-08 02:39:48 -0800 11) #include <linux/stacktrace.h>
6ff1cb355e628 (Akinobu Mita 2006-12-08 02:39:43 -0800 12) #include <linux/fault-inject.h>
6ff1cb355e628 (Akinobu Mita 2006-12-08 02:39:43 -0800 13)
6ff1cb355e628 (Akinobu Mita 2006-12-08 02:39:43 -0800 14) /*
6ff1cb355e628 (Akinobu Mita 2006-12-08 02:39:43 -0800 15) * setup_fault_attr() is a helper function for various __setup handlers, so it
6ff1cb355e628 (Akinobu Mita 2006-12-08 02:39:43 -0800 16) * returns 0 on error, because that is what __setup handlers do.
6ff1cb355e628 (Akinobu Mita 2006-12-08 02:39:43 -0800 17) */
6cba00eaa95c1 (Per Forlin 2011-09-13 23:03:28 +0200 18) int setup_fault_attr(struct fault_attr *attr, char *str)
6ff1cb355e628 (Akinobu Mita 2006-12-08 02:39:43 -0800 19) {
6ff1cb355e628 (Akinobu Mita 2006-12-08 02:39:43 -0800 20) unsigned long probability;
6ff1cb355e628 (Akinobu Mita 2006-12-08 02:39:43 -0800 21) unsigned long interval;
6ff1cb355e628 (Akinobu Mita 2006-12-08 02:39:43 -0800 22) int times;
6ff1cb355e628 (Akinobu Mita 2006-12-08 02:39:43 -0800 23) int space;
6ff1cb355e628 (Akinobu Mita 2006-12-08 02:39:43 -0800 24)
6ff1cb355e628 (Akinobu Mita 2006-12-08 02:39:43 -0800 25) /* "<interval>,<probability>,<space>,<times>" */
6ff1cb355e628 (Akinobu Mita 2006-12-08 02:39:43 -0800 26) if (sscanf(str, "%lu,%lu,%d,%d",
6ff1cb355e628 (Akinobu Mita 2006-12-08 02:39:43 -0800 27) &interval, &probability, &space, ×) < 4) {
6ff1cb355e628 (Akinobu Mita 2006-12-08 02:39:43 -0800 28) printk(KERN_WARNING
6ff1cb355e628 (Akinobu Mita 2006-12-08 02:39:43 -0800 29) "FAULT_INJECTION: failed to parse arguments\n");
6ff1cb355e628 (Akinobu Mita 2006-12-08 02:39:43 -0800 30) return 0;
6ff1cb355e628 (Akinobu Mita 2006-12-08 02:39:43 -0800 31) }
6ff1cb355e628 (Akinobu Mita 2006-12-08 02:39:43 -0800 32)
6ff1cb355e628 (Akinobu Mita 2006-12-08 02:39:43 -0800 33) attr->probability = probability;
6ff1cb355e628 (Akinobu Mita 2006-12-08 02:39:43 -0800 34) attr->interval = interval;
6ff1cb355e628 (Akinobu Mita 2006-12-08 02:39:43 -0800 35) atomic_set(&attr->times, times);
6ff1cb355e628 (Akinobu Mita 2006-12-08 02:39:43 -0800 36) atomic_set(&attr->space, space);
6ff1cb355e628 (Akinobu Mita 2006-12-08 02:39:43 -0800 37)
6ff1cb355e628 (Akinobu Mita 2006-12-08 02:39:43 -0800 38) return 1;
6ff1cb355e628 (Akinobu Mita 2006-12-08 02:39:43 -0800 39) }
6cba00eaa95c1 (Per Forlin 2011-09-13 23:03:28 +0200 40) EXPORT_SYMBOL_GPL(setup_fault_attr);
6ff1cb355e628 (Akinobu Mita 2006-12-08 02:39:43 -0800 41)
6ff1cb355e628 (Akinobu Mita 2006-12-08 02:39:43 -0800 42) static void fail_dump(struct fault_attr *attr)
6ff1cb355e628 (Akinobu Mita 2006-12-08 02:39:43 -0800 43) {
6adc4a22f20bb (Dmitry Monakhov 2014-12-12 16:58:00 -0800 44) if (attr->verbose > 0 && __ratelimit(&attr->ratelimit_state)) {
6adc4a22f20bb (Dmitry Monakhov 2014-12-12 16:58:00 -0800 45) printk(KERN_NOTICE "FAULT_INJECTION: forcing a failure.\n"
6adc4a22f20bb (Dmitry Monakhov 2014-12-12 16:58:00 -0800 46) "name %pd, interval %lu, probability %lu, "
6adc4a22f20bb (Dmitry Monakhov 2014-12-12 16:58:00 -0800 47) "space %d, times %d\n", attr->dname,
bb387002693ed (Florian Westphal 2015-10-22 13:32:27 -0700 48) attr->interval, attr->probability,
6adc4a22f20bb (Dmitry Monakhov 2014-12-12 16:58:00 -0800 49) atomic_read(&attr->space),
6adc4a22f20bb (Dmitry Monakhov 2014-12-12 16:58:00 -0800 50) atomic_read(&attr->times));
6adc4a22f20bb (Dmitry Monakhov 2014-12-12 16:58:00 -0800 51) if (attr->verbose > 1)
6adc4a22f20bb (Dmitry Monakhov 2014-12-12 16:58:00 -0800 52) dump_stack();
6adc4a22f20bb (Dmitry Monakhov 2014-12-12 16:58:00 -0800 53) }
6ff1cb355e628 (Akinobu Mita 2006-12-08 02:39:43 -0800 54) }
6ff1cb355e628 (Akinobu Mita 2006-12-08 02:39:43 -0800 55)
6ff1cb355e628 (Akinobu Mita 2006-12-08 02:39:43 -0800 56) #define atomic_dec_not_zero(v) atomic_add_unless((v), -1, 0)
6ff1cb355e628 (Akinobu Mita 2006-12-08 02:39:43 -0800 57)
08b3df2d16cbe (Don Mullis 2006-12-08 02:39:51 -0800 58) static bool fail_task(struct fault_attr *attr, struct task_struct *task)
f4f154fd920b2 (Akinobu Mita 2006-12-08 02:39:47 -0800 59) {
f2ad37da80541 (Dmitry Vyukov 2017-05-08 15:56:51 -0700 60) return in_task() && task->make_it_fail;
f4f154fd920b2 (Akinobu Mita 2006-12-08 02:39:47 -0800 61) }
f4f154fd920b2 (Akinobu Mita 2006-12-08 02:39:47 -0800 62)
a124c28ef85d9 (Don Mullis 2006-12-08 02:39:52 -0800 63) #define MAX_STACK_TRACE_DEPTH 32
a124c28ef85d9 (Don Mullis 2006-12-08 02:39:52 -0800 64)
1df49008f4dde (Akinobu Mita 2007-02-20 13:57:56 -0800 65) #ifdef CONFIG_FAULT_INJECTION_STACKTRACE_FILTER
329409aeda064 (Akinobu Mita 2006-12-08 02:39:48 -0800 66)
08b3df2d16cbe (Don Mullis 2006-12-08 02:39:51 -0800 67) static bool fail_stacktrace(struct fault_attr *attr)
329409aeda064 (Akinobu Mita 2006-12-08 02:39:48 -0800 68) {
329409aeda064 (Akinobu Mita 2006-12-08 02:39:48 -0800 69) int depth = attr->stacktrace_depth;
329409aeda064 (Akinobu Mita 2006-12-08 02:39:48 -0800 70) unsigned long entries[MAX_STACK_TRACE_DEPTH];
30191250c2b3e (Thomas Gleixner 2019-04-25 11:45:04 +0200 71) int n, nr_entries;
329409aeda064 (Akinobu Mita 2006-12-08 02:39:48 -0800 72) bool found = (attr->require_start == 0 && attr->require_end == ULONG_MAX);
329409aeda064 (Akinobu Mita 2006-12-08 02:39:48 -0800 73)
329409aeda064 (Akinobu Mita 2006-12-08 02:39:48 -0800 74) if (depth == 0)
329409aeda064 (Akinobu Mita 2006-12-08 02:39:48 -0800 75) return found;
329409aeda064 (Akinobu Mita 2006-12-08 02:39:48 -0800 76)
30191250c2b3e (Thomas Gleixner 2019-04-25 11:45:04 +0200 77) nr_entries = stack_trace_save(entries, depth, 1);
30191250c2b3e (Thomas Gleixner 2019-04-25 11:45:04 +0200 78) for (n = 0; n < nr_entries; n++) {
329409aeda064 (Akinobu Mita 2006-12-08 02:39:48 -0800 79) if (attr->reject_start <= entries[n] &&
329409aeda064 (Akinobu Mita 2006-12-08 02:39:48 -0800 80) entries[n] < attr->reject_end)
08b3df2d16cbe (Don Mullis 2006-12-08 02:39:51 -0800 81) return false;
329409aeda064 (Akinobu Mita 2006-12-08 02:39:48 -0800 82) if (attr->require_start <= entries[n] &&
329409aeda064 (Akinobu Mita 2006-12-08 02:39:48 -0800 83) entries[n] < attr->require_end)
08b3df2d16cbe (Don Mullis 2006-12-08 02:39:51 -0800 84) found = true;
329409aeda064 (Akinobu Mita 2006-12-08 02:39:48 -0800 85) }
329409aeda064 (Akinobu Mita 2006-12-08 02:39:48 -0800 86) return found;
329409aeda064 (Akinobu Mita 2006-12-08 02:39:48 -0800 87) }
329409aeda064 (Akinobu Mita 2006-12-08 02:39:48 -0800 88)
329409aeda064 (Akinobu Mita 2006-12-08 02:39:48 -0800 89) #else
329409aeda064 (Akinobu Mita 2006-12-08 02:39:48 -0800 90)
08b3df2d16cbe (Don Mullis 2006-12-08 02:39:51 -0800 91) static inline bool fail_stacktrace(struct fault_attr *attr)
329409aeda064 (Akinobu Mita 2006-12-08 02:39:48 -0800 92) {
1df49008f4dde (Akinobu Mita 2007-02-20 13:57:56 -0800 93) return true;
329409aeda064 (Akinobu Mita 2006-12-08 02:39:48 -0800 94) }
329409aeda064 (Akinobu Mita 2006-12-08 02:39:48 -0800 95)
1df49008f4dde (Akinobu Mita 2007-02-20 13:57:56 -0800 96) #endif /* CONFIG_FAULT_INJECTION_STACKTRACE_FILTER */
329409aeda064 (Akinobu Mita 2006-12-08 02:39:48 -0800 97)
6ff1cb355e628 (Akinobu Mita 2006-12-08 02:39:43 -0800 98) /*
6ff1cb355e628 (Akinobu Mita 2006-12-08 02:39:43 -0800 99) * This code is stolen from failmalloc-1.0
6ff1cb355e628 (Akinobu Mita 2006-12-08 02:39:43 -0800 100) * http://www.nongnu.org/failmalloc/
6ff1cb355e628 (Akinobu Mita 2006-12-08 02:39:43 -0800 101) */
6ff1cb355e628 (Akinobu Mita 2006-12-08 02:39:43 -0800 102)
08b3df2d16cbe (Don Mullis 2006-12-08 02:39:51 -0800 103) bool should_fail(struct fault_attr *attr, ssize_t size)
6ff1cb355e628 (Akinobu Mita 2006-12-08 02:39:43 -0800 104) {
1203c8e6fb0aa (Akinobu Mita 2017-07-14 14:49:57 -0700 105) if (in_task()) {
1203c8e6fb0aa (Akinobu Mita 2017-07-14 14:49:57 -0700 106) unsigned int fail_nth = READ_ONCE(current->fail_nth);
1203c8e6fb0aa (Akinobu Mita 2017-07-14 14:49:57 -0700 107)
9eeb52ae712e7 (Akinobu Mita 2017-08-10 15:23:53 -0700 108) if (fail_nth) {
9b4fb5cec031f (Will Deacon 2019-12-19 17:40:21 +0000 109) fail_nth--;
9b4fb5cec031f (Will Deacon 2019-12-19 17:40:21 +0000 110) WRITE_ONCE(current->fail_nth, fail_nth);
9b4fb5cec031f (Will Deacon 2019-12-19 17:40:21 +0000 111) if (!fail_nth)
9eeb52ae712e7 (Akinobu Mita 2017-08-10 15:23:53 -0700 112) goto fail;
1203c8e6fb0aa (Akinobu Mita 2017-07-14 14:49:57 -0700 113)
9eeb52ae712e7 (Akinobu Mita 2017-08-10 15:23:53 -0700 114) return false;
9eeb52ae712e7 (Akinobu Mita 2017-08-10 15:23:53 -0700 115) }
e41d58185f144 (Dmitry Vyukov 2017-07-12 14:34:35 -0700 116) }
e41d58185f144 (Dmitry Vyukov 2017-07-12 14:34:35 -0700 117)
f39cdaebb89dc (Anton Blanchard 2012-06-20 12:53:03 -0700 118) /* No need to check any other properties if the probability is 0 */
f39cdaebb89dc (Anton Blanchard 2012-06-20 12:53:03 -0700 119) if (attr->probability == 0)
f39cdaebb89dc (Anton Blanchard 2012-06-20 12:53:03 -0700 120) return false;
f39cdaebb89dc (Anton Blanchard 2012-06-20 12:53:03 -0700 121)
f4f154fd920b2 (Akinobu Mita 2006-12-08 02:39:47 -0800 122) if (attr->task_filter && !fail_task(attr, current))
08b3df2d16cbe (Don Mullis 2006-12-08 02:39:51 -0800 123) return false;
f4f154fd920b2 (Akinobu Mita 2006-12-08 02:39:47 -0800 124)
6ff1cb355e628 (Akinobu Mita 2006-12-08 02:39:43 -0800 125) if (atomic_read(&attr->times) == 0)
08b3df2d16cbe (Don Mullis 2006-12-08 02:39:51 -0800 126) return false;
6ff1cb355e628 (Akinobu Mita 2006-12-08 02:39:43 -0800 127)
6ff1cb355e628 (Akinobu Mita 2006-12-08 02:39:43 -0800 128) if (atomic_read(&attr->space) > size) {
6ff1cb355e628 (Akinobu Mita 2006-12-08 02:39:43 -0800 129) atomic_sub(size, &attr->space);
08b3df2d16cbe (Don Mullis 2006-12-08 02:39:51 -0800 130) return false;
6ff1cb355e628 (Akinobu Mita 2006-12-08 02:39:43 -0800 131) }
6ff1cb355e628 (Akinobu Mita 2006-12-08 02:39:43 -0800 132)
6ff1cb355e628 (Akinobu Mita 2006-12-08 02:39:43 -0800 133) if (attr->interval > 1) {
6ff1cb355e628 (Akinobu Mita 2006-12-08 02:39:43 -0800 134) attr->count++;
6ff1cb355e628 (Akinobu Mita 2006-12-08 02:39:43 -0800 135) if (attr->count % attr->interval)
08b3df2d16cbe (Don Mullis 2006-12-08 02:39:51 -0800 136) return false;
6ff1cb355e628 (Akinobu Mita 2006-12-08 02:39:43 -0800 137) }
6ff1cb355e628 (Akinobu Mita 2006-12-08 02:39:43 -0800 138)
f39fee5f11f7a (Akinobu Mita 2013-04-29 16:21:28 -0700 139) if (attr->probability <= prandom_u32() % 100)
f1729c28a37e4 (Don Mullis 2006-12-08 02:39:53 -0800 140) return false;
6ff1cb355e628 (Akinobu Mita 2006-12-08 02:39:43 -0800 141)
f1729c28a37e4 (Don Mullis 2006-12-08 02:39:53 -0800 142) if (!fail_stacktrace(attr))
f1729c28a37e4 (Don Mullis 2006-12-08 02:39:53 -0800 143) return false;
6ff1cb355e628 (Akinobu Mita 2006-12-08 02:39:43 -0800 144)
e41d58185f144 (Dmitry Vyukov 2017-07-12 14:34:35 -0700 145) fail:
6ff1cb355e628 (Akinobu Mita 2006-12-08 02:39:43 -0800 146) fail_dump(attr);
6ff1cb355e628 (Akinobu Mita 2006-12-08 02:39:43 -0800 147)
6ff1cb355e628 (Akinobu Mita 2006-12-08 02:39:43 -0800 148) if (atomic_read(&attr->times) != -1)
6ff1cb355e628 (Akinobu Mita 2006-12-08 02:39:43 -0800 149) atomic_dec_not_zero(&attr->times);
6ff1cb355e628 (Akinobu Mita 2006-12-08 02:39:43 -0800 150)
08b3df2d16cbe (Don Mullis 2006-12-08 02:39:51 -0800 151) return true;
6ff1cb355e628 (Akinobu Mita 2006-12-08 02:39:43 -0800 152) }
df87ecbf19109 (Per Forlin 2011-08-19 14:52:36 +0200 153) EXPORT_SYMBOL_GPL(should_fail);
6ff1cb355e628 (Akinobu Mita 2006-12-08 02:39:43 -0800 154)
6ff1cb355e628 (Akinobu Mita 2006-12-08 02:39:43 -0800 155) #ifdef CONFIG_FAULT_INJECTION_DEBUG_FS
6ff1cb355e628 (Akinobu Mita 2006-12-08 02:39:43 -0800 156)
8b88b0998e35d (Christoph Hellwig 2008-02-08 04:20:26 -0800 157) static int debugfs_ul_set(void *data, u64 val)
6ff1cb355e628 (Akinobu Mita 2006-12-08 02:39:43 -0800 158) {
6ff1cb355e628 (Akinobu Mita 2006-12-08 02:39:43 -0800 159) *(unsigned long *)data = val;
8b88b0998e35d (Christoph Hellwig 2008-02-08 04:20:26 -0800 160) return 0;
6ff1cb355e628 (Akinobu Mita 2006-12-08 02:39:43 -0800 161) }
6ff1cb355e628 (Akinobu Mita 2006-12-08 02:39:43 -0800 162)
8b88b0998e35d (Christoph Hellwig 2008-02-08 04:20:26 -0800 163) static int debugfs_ul_get(void *data, u64 *val)
6ff1cb355e628 (Akinobu Mita 2006-12-08 02:39:43 -0800 164) {
8b88b0998e35d (Christoph Hellwig 2008-02-08 04:20:26 -0800 165) *val = *(unsigned long *)data;
8b88b0998e35d (Christoph Hellwig 2008-02-08 04:20:26 -0800 166) return 0;
6ff1cb355e628 (Akinobu Mita 2006-12-08 02:39:43 -0800 167) }
6ff1cb355e628 (Akinobu Mita 2006-12-08 02:39:43 -0800 168)
6ff1cb355e628 (Akinobu Mita 2006-12-08 02:39:43 -0800 169) DEFINE_SIMPLE_ATTRIBUTE(fops_ul, debugfs_ul_get, debugfs_ul_set, "%llu\n");
6ff1cb355e628 (Akinobu Mita 2006-12-08 02:39:43 -0800 170)
053cf51040ed0 (Greg Kroah-Hartman 2019-06-12 11:58:28 +0200 171) static void debugfs_create_ul(const char *name, umode_t mode,
053cf51040ed0 (Greg Kroah-Hartman 2019-06-12 11:58:28 +0200 172) struct dentry *parent, unsigned long *value)
6ff1cb355e628 (Akinobu Mita 2006-12-08 02:39:43 -0800 173) {
053cf51040ed0 (Greg Kroah-Hartman 2019-06-12 11:58:28 +0200 174) debugfs_create_file(name, mode, parent, value, &fops_ul);
6ff1cb355e628 (Akinobu Mita 2006-12-08 02:39:43 -0800 175) }
6ff1cb355e628 (Akinobu Mita 2006-12-08 02:39:43 -0800 176)
6ddb23c78aeef (Stephen Rothwell 2007-07-23 18:43:55 -0700 177) #ifdef CONFIG_FAULT_INJECTION_STACKTRACE_FILTER
a124c28ef85d9 (Don Mullis 2006-12-08 02:39:52 -0800 178)
8307fc257cf39 (Akinobu Mita 2011-07-26 16:09:01 -0700 179) static int debugfs_stacktrace_depth_set(void *data, u64 val)
8307fc257cf39 (Akinobu Mita 2011-07-26 16:09:01 -0700 180) {
8307fc257cf39 (Akinobu Mita 2011-07-26 16:09:01 -0700 181) *(unsigned long *)data =
8307fc257cf39 (Akinobu Mita 2011-07-26 16:09:01 -0700 182) min_t(unsigned long, val, MAX_STACK_TRACE_DEPTH);
8307fc257cf39 (Akinobu Mita 2011-07-26 16:09:01 -0700 183)
8307fc257cf39 (Akinobu Mita 2011-07-26 16:09:01 -0700 184) return 0;
8307fc257cf39 (Akinobu Mita 2011-07-26 16:09:01 -0700 185) }
8307fc257cf39 (Akinobu Mita 2011-07-26 16:09:01 -0700 186)
8307fc257cf39 (Akinobu Mita 2011-07-26 16:09:01 -0700 187) DEFINE_SIMPLE_ATTRIBUTE(fops_stacktrace_depth, debugfs_ul_get,
8307fc257cf39 (Akinobu Mita 2011-07-26 16:09:01 -0700 188) debugfs_stacktrace_depth_set, "%llu\n");
8307fc257cf39 (Akinobu Mita 2011-07-26 16:09:01 -0700 189)
053cf51040ed0 (Greg Kroah-Hartman 2019-06-12 11:58:28 +0200 190) static void debugfs_create_stacktrace_depth(const char *name, umode_t mode,
053cf51040ed0 (Greg Kroah-Hartman 2019-06-12 11:58:28 +0200 191) struct dentry *parent,
053cf51040ed0 (Greg Kroah-Hartman 2019-06-12 11:58:28 +0200 192) unsigned long *value)
a124c28ef85d9 (Don Mullis 2006-12-08 02:39:52 -0800 193) {
053cf51040ed0 (Greg Kroah-Hartman 2019-06-12 11:58:28 +0200 194) debugfs_create_file(name, mode, parent, value, &fops_stacktrace_depth);
a124c28ef85d9 (Don Mullis 2006-12-08 02:39:52 -0800 195) }
8307fc257cf39 (Akinobu Mita 2011-07-26 16:09:01 -0700 196)
6ddb23c78aeef (Stephen Rothwell 2007-07-23 18:43:55 -0700 197) #endif /* CONFIG_FAULT_INJECTION_STACKTRACE_FILTER */
a124c28ef85d9 (Don Mullis 2006-12-08 02:39:52 -0800 198)
dd48c085c1cdf (Akinobu Mita 2011-08-03 16:21:01 -0700 199) struct dentry *fault_create_debugfs_attr(const char *name,
dd48c085c1cdf (Akinobu Mita 2011-08-03 16:21:01 -0700 200) struct dentry *parent, struct fault_attr *attr)
6ff1cb355e628 (Akinobu Mita 2006-12-08 02:39:43 -0800 201) {
f4ae40a6a50a9 (Al Viro 2011-07-24 04:33:43 -0400 202) umode_t mode = S_IFREG | S_IRUSR | S_IWUSR;
6ff1cb355e628 (Akinobu Mita 2006-12-08 02:39:43 -0800 203) struct dentry *dir;
6ff1cb355e628 (Akinobu Mita 2006-12-08 02:39:43 -0800 204)
dd48c085c1cdf (Akinobu Mita 2011-08-03 16:21:01 -0700 205) dir = debugfs_create_dir(name, parent);
053cf51040ed0 (Greg Kroah-Hartman 2019-06-12 11:58:28 +0200 206) if (IS_ERR(dir))
053cf51040ed0 (Greg Kroah-Hartman 2019-06-12 11:58:28 +0200 207) return dir;
053cf51040ed0 (Greg Kroah-Hartman 2019-06-12 11:58:28 +0200 208)
053cf51040ed0 (Greg Kroah-Hartman 2019-06-12 11:58:28 +0200 209) debugfs_create_ul("probability", mode, dir, &attr->probability);
053cf51040ed0 (Greg Kroah-Hartman 2019-06-12 11:58:28 +0200 210) debugfs_create_ul("interval", mode, dir, &attr->interval);
053cf51040ed0 (Greg Kroah-Hartman 2019-06-12 11:58:28 +0200 211) debugfs_create_atomic_t("times", mode, dir, &attr->times);
053cf51040ed0 (Greg Kroah-Hartman 2019-06-12 11:58:28 +0200 212) debugfs_create_atomic_t("space", mode, dir, &attr->space);
053cf51040ed0 (Greg Kroah-Hartman 2019-06-12 11:58:28 +0200 213) debugfs_create_ul("verbose", mode, dir, &attr->verbose);
053cf51040ed0 (Greg Kroah-Hartman 2019-06-12 11:58:28 +0200 214) debugfs_create_u32("verbose_ratelimit_interval_ms", mode, dir,
053cf51040ed0 (Greg Kroah-Hartman 2019-06-12 11:58:28 +0200 215) &attr->ratelimit_state.interval);
053cf51040ed0 (Greg Kroah-Hartman 2019-06-12 11:58:28 +0200 216) debugfs_create_u32("verbose_ratelimit_burst", mode, dir,
053cf51040ed0 (Greg Kroah-Hartman 2019-06-12 11:58:28 +0200 217) &attr->ratelimit_state.burst);
053cf51040ed0 (Greg Kroah-Hartman 2019-06-12 11:58:28 +0200 218) debugfs_create_bool("task-filter", mode, dir, &attr->task_filter);
1df49008f4dde (Akinobu Mita 2007-02-20 13:57:56 -0800 219)
1df49008f4dde (Akinobu Mita 2007-02-20 13:57:56 -0800 220) #ifdef CONFIG_FAULT_INJECTION_STACKTRACE_FILTER
053cf51040ed0 (Greg Kroah-Hartman 2019-06-12 11:58:28 +0200 221) debugfs_create_stacktrace_depth("stacktrace-depth", mode, dir,
053cf51040ed0 (Greg Kroah-Hartman 2019-06-12 11:58:28 +0200 222) &attr->stacktrace_depth);
053cf51040ed0 (Greg Kroah-Hartman 2019-06-12 11:58:28 +0200 223) debugfs_create_ul("require-start", mode, dir, &attr->require_start);
053cf51040ed0 (Greg Kroah-Hartman 2019-06-12 11:58:28 +0200 224) debugfs_create_ul("require-end", mode, dir, &attr->require_end);
053cf51040ed0 (Greg Kroah-Hartman 2019-06-12 11:58:28 +0200 225) debugfs_create_ul("reject-start", mode, dir, &attr->reject_start);
053cf51040ed0 (Greg Kroah-Hartman 2019-06-12 11:58:28 +0200 226) debugfs_create_ul("reject-end", mode, dir, &attr->reject_end);
1df49008f4dde (Akinobu Mita 2007-02-20 13:57:56 -0800 227) #endif /* CONFIG_FAULT_INJECTION_STACKTRACE_FILTER */
1df49008f4dde (Akinobu Mita 2007-02-20 13:57:56 -0800 228)
6adc4a22f20bb (Dmitry Monakhov 2014-12-12 16:58:00 -0800 229) attr->dname = dget(dir);
dd48c085c1cdf (Akinobu Mita 2011-08-03 16:21:01 -0700 230) return dir;
6ff1cb355e628 (Akinobu Mita 2006-12-08 02:39:43 -0800 231) }
df87ecbf19109 (Per Forlin 2011-08-19 14:52:36 +0200 232) EXPORT_SYMBOL_GPL(fault_create_debugfs_attr);
6ff1cb355e628 (Akinobu Mita 2006-12-08 02:39:43 -0800 233)
6ff1cb355e628 (Akinobu Mita 2006-12-08 02:39:43 -0800 234) #endif /* CONFIG_FAULT_INJECTION_DEBUG_FS */
VisionFive2 Linux kernel
StarFive Tech Linux Kernel for VisionFive (JH7110) boards (mirror)
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