c/mirror_zfs
1
0
Fork 0
mirror of https://git.proxmox.com/git/mirror_zfs.git synced 2026-05-22 10:37:35 +03:00
Code Issues Packages Projects Releases Wiki Activity

Inject zinject(8) a percentage amount of dev errs

Browse Source 
In the original form of device error injection, it was an all or nothing
situation.  To help simulate intermittent error conditions, you can now
specify a real number percentage value. This is also very useful for our
ZFS fault diagnosis testing and for injecting intermittent errors during
load testing.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Don Brady <don.brady@intel.com>
Closes #6227
This commit is contained in:
Don Brady
2017-06-16 18:21:11 -06:00
committed by Brian Behlendorf
parent 05a5357a6c
commit 0241e491a0
4 changed files with 76 additions and 20 deletions
Download Patch File Download Diff File Expand all files Collapse all files
cmd/zinject/zinject.c
+38 -10
View File
@@ -21,6 +21,7 @@
/*
* Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2012, 2015 by Delphix. All rights reserved.
* Copyright (c) 2017, Intel Corporation.
*/
/*
@@ -124,7 +125,7 @@
* cache.
*
* The '-f' flag controls the frequency of errors injected, expressed as a
* integer percentage between 1 and 100. The default is 100.
* real number percentage between 0.0001 and 100. The default is 100.
*
* The this form is responsible for actually injecting the handler into the
* framework. It takes the arguments described above, translates them to the
@@ -230,11 +231,13 @@ usage(void)
"\t\tspa_vdev_exit() will trigger a panic.\n"
"\n"
"\tzinject -d device [-e errno] [-L <nvlist|uber|pad1|pad2>] [-F]\n"
"\t [-T <read|write|free|claim|all> pool\n"
"\t [-T <read|write|free|claim|all>] [-f frequency] pool\n"
"\t\tInject a fault into a particular device or the device's\n"
"\t\tlabel. Label injection can either be 'nvlist', 'uber',\n "
"\t\t'pad1', or 'pad2'.\n"
"\t\t'errno' can be 'nxio' (the default), 'io', or 'dtl'.\n"
"\t\t'frequency' is a value between 0.0001 and 100.0 that limits\n"
"\t\tdevice error injection to a percentage of the IOs.\n"
"\n"
"\tzinject -d device -A <degrade|fault> -D <delay secs> pool\n"
"\t\tPerform a specific action on a particular device.\n"
@@ -305,7 +308,7 @@ usage(void)
"\t\t-u\tUnload the associated pool. Can be specified with only\n"
"\t\t\ta pool object.\n"
"\t\t-f\tOnly inject errors a fraction of the time. Expressed as\n"
"\t\t\ta percentage between 1 and 100.\n"
"\t\t\ta percentage between 0.0001 and 100.\n"
"\n"
"\t-t data\t\tInject an error into the plain file contents of a\n"
"\t\t\tfile. The object must be specified as a complete path\n"
@@ -645,6 +648,27 @@ parse_delay(char *str, uint64_t *delay, uint64_t *nlanes)
return (0);
}
static int
parse_frequency(const char *str, uint32_t *percent)
{
double val;
char *post;
val = strtod(str, &post);
if (post == NULL || *post != '\0')
return (EINVAL);
/* valid range is [0.0001, 100.0] */
val /= 100.0f;
if (val < 0.000001f || val > 1.0f)
return (ERANGE);
/* convert to an integer for use by kernel */
*percent = ((uint32_t)(val * ZI_PERCENTAGE_MAX));
return (0);
}
int
main(int argc, char **argv)
{
@@ -760,10 +784,12 @@ main(int argc, char **argv)
}
break;
case 'f':
record.zi_freq = atoi(optarg);
if (record.zi_freq < 1 || record.zi_freq > 100) {
(void) fprintf(stderr, "frequency range must "
"be in the range (0, 100]\n");
ret = parse_frequency(optarg, &record.zi_freq);
if (ret != 0) {
(void) fprintf(stderr, "%sfrequency value must "
"be in the range [0.0001, 100.0]\n",
ret == EINVAL ? "invalid value: " :
ret == ERANGE ? "out of range: " : "");
libzfs_fini(g_zfs);
return (1);
}
@@ -898,7 +924,8 @@ main(int argc, char **argv)
* '-c' is invalid with any other options.
*/
if (raw != NULL || range != NULL || type != TYPE_INVAL ||
level != 0 || record.zi_cmd != ZINJECT_UNINITIALIZED) {
level != 0 || record.zi_cmd != ZINJECT_UNINITIALIZED ||
record.zi_freq > 0) {
(void) fprintf(stderr, "cancel (-c) incompatible with "
"any other options\n");
usage();
@@ -972,7 +999,8 @@ main(int argc, char **argv)
} else if (raw != NULL) {
if (range != NULL || type != TYPE_INVAL || level != 0 ||
record.zi_cmd != ZINJECT_UNINITIALIZED) {
record.zi_cmd != ZINJECT_UNINITIALIZED ||
record.zi_freq > 0) {
(void) fprintf(stderr, "raw (-b) format with "
"any other options\n");
usage();
@@ -1007,7 +1035,7 @@ main(int argc, char **argv)
error = EIO;
} else if (record.zi_cmd == ZINJECT_PANIC) {
if (raw != NULL || range != NULL || type != TYPE_INVAL ||
level != 0 || device != NULL) {
level != 0 || device != NULL || record.zi_freq > 0) {
(void) fprintf(stderr, "panic (-p) incompatible with "
"other options\n");
usage();