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ztest.c
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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2011, 2018 by Delphix. All rights reserved.
* Copyright 2011 Nexenta Systems, Inc. All rights reserved.
* Copyright (c) 2013 Steven Hartland. All rights reserved.
* Copyright (c) 2014 Integros [integros.com]
* Copyright 2017 Joyent, Inc.
* Copyright (c) 2017, Intel Corporation.
*/
/*
* The objective of this program is to provide a DMU/ZAP/SPA stress test
* that runs entirely in userland, is easy to use, and easy to extend.
*
* The overall design of the ztest program is as follows:
*
* (1) For each major functional area (e.g. adding vdevs to a pool,
* creating and destroying datasets, reading and writing objects, etc)
* we have a simple routine to test that functionality. These
* individual routines do not have to do anything "stressful".
*
* (2) We turn these simple functionality tests into a stress test by
* running them all in parallel, with as many threads as desired,
* and spread across as many datasets, objects, and vdevs as desired.
*
* (3) While all this is happening, we inject faults into the pool to
* verify that self-healing data really works.
*
* (4) Every time we open a dataset, we change its checksum and compression
* functions. Thus even individual objects vary from block to block
* in which checksum they use and whether they're compressed.
*
* (5) To verify that we never lose on-disk consistency after a crash,
* we run the entire test in a child of the main process.
* At random times, the child self-immolates with a SIGKILL.
* This is the software equivalent of pulling the power cord.
* The parent then runs the test again, using the existing
* storage pool, as many times as desired. If backwards compatibility
* testing is enabled ztest will sometimes run the "older" version
* of ztest after a SIGKILL.
*
* (6) To verify that we don't have future leaks or temporal incursions,
* many of the functional tests record the transaction group number
* as part of their data. When reading old data, they verify that
* the transaction group number is less than the current, open txg.
* If you add a new test, please do this if applicable.
*
* (7) Threads are created with a reduced stack size, for sanity checking.
* Therefore, it's important not to allocate huge buffers on the stack.
*
* When run with no arguments, ztest runs for about five minutes and
* produces no output if successful. To get a little bit of information,
* specify -V. To get more information, specify -VV, and so on.
*
* To turn this into an overnight stress test, use -T to specify run time.
*
* You can ask more vdevs [-v], datasets [-d], or threads [-t]
* to increase the pool capacity, fanout, and overall stress level.
*
* Use the -k option to set the desired frequency of kills.
*
* When ztest invokes itself it passes all relevant information through a
* temporary file which is mmap-ed in the child process. This allows shared
* memory to survive the exec syscall. The ztest_shared_hdr_t struct is always
* stored at offset 0 of this file and contains information on the size and
* number of shared structures in the file. The information stored in this file
* must remain backwards compatible with older versions of ztest so that
* ztest can invoke them during backwards compatibility testing (-B).
*/
#include <sys/zfs_context.h>
#include <sys/spa.h>
#include <sys/dmu.h>
#include <sys/txg.h>
#include <sys/dbuf.h>
#include <sys/zap.h>
#include <sys/dmu_objset.h>
#include <sys/poll.h>
#include <sys/stat.h>
#include <sys/time.h>
#include <sys/wait.h>
#include <sys/mman.h>
#include <sys/resource.h>
#include <sys/zio.h>
#include <sys/zil.h>
#include <sys/zil_impl.h>
#include <sys/vdev_draid.h>
#include <sys/vdev_impl.h>
#include <sys/vdev_file.h>
#include <sys/vdev_initialize.h>
#include <sys/vdev_raidz.h>
#include <sys/vdev_trim.h>
#include <sys/spa_impl.h>
#include <sys/metaslab_impl.h>
#include <sys/dsl_prop.h>
#include <sys/dsl_dataset.h>
#include <sys/dsl_destroy.h>
#include <sys/dsl_scan.h>
#include <sys/zio_checksum.h>
#include <sys/zfs_refcount.h>
#include <sys/zfeature.h>
#include <sys/dsl_userhold.h>
#include <sys/abd.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <getopt.h>
#include <signal.h>
#include <umem.h>
#include <ctype.h>
#include <math.h>
#include <sys/fs/zfs.h>
#include <zfs_fletcher.h>
#include <libnvpair.h>
#include <libzutil.h>
#include <sys/crypto/icp.h>
#if (__GLIBC__ && !__UCLIBC__)
#include <execinfo.h> /* for backtrace() */
#endif
static int ztest_fd_data = -1;
static int ztest_fd_rand = -1;
typedef struct ztest_shared_hdr {
uint64_t zh_hdr_size;
uint64_t zh_opts_size;
uint64_t zh_size;
uint64_t zh_stats_size;
uint64_t zh_stats_count;
uint64_t zh_ds_size;
uint64_t zh_ds_count;
} ztest_shared_hdr_t;
static ztest_shared_hdr_t *ztest_shared_hdr;
enum ztest_class_state {
ZTEST_VDEV_CLASS_OFF,
ZTEST_VDEV_CLASS_ON,
ZTEST_VDEV_CLASS_RND
};
#define ZO_GVARS_MAX_ARGLEN ((size_t)64)
#define ZO_GVARS_MAX_COUNT ((size_t)10)
typedef struct ztest_shared_opts {
char zo_pool[ZFS_MAX_DATASET_NAME_LEN];
char zo_dir[ZFS_MAX_DATASET_NAME_LEN];
char zo_alt_ztest[MAXNAMELEN];
char zo_alt_libpath[MAXNAMELEN];
uint64_t zo_vdevs;
uint64_t zo_vdevtime;
size_t zo_vdev_size;
int zo_ashift;
int zo_mirrors;
int zo_raid_children;
int zo_raid_parity;
char zo_raid_type[8];
int zo_draid_data;
int zo_draid_spares;
int zo_datasets;
int zo_threads;
uint64_t zo_passtime;
uint64_t zo_killrate;
int zo_verbose;
int zo_init;
uint64_t zo_time;
uint64_t zo_maxloops;
uint64_t zo_metaslab_force_ganging;
int zo_mmp_test;
int zo_special_vdevs;
int zo_dump_dbgmsg;
int zo_gvars_count;
char zo_gvars[ZO_GVARS_MAX_COUNT][ZO_GVARS_MAX_ARGLEN];
} ztest_shared_opts_t;
/* Default values for command line options. */
#define DEFAULT_POOL "ztest"
#define DEFAULT_VDEV_DIR "/tmp"
#define DEFAULT_VDEV_COUNT 5
#define DEFAULT_VDEV_SIZE (SPA_MINDEVSIZE * 4) /* 256m default size */
#define DEFAULT_VDEV_SIZE_STR "256M"
#define DEFAULT_ASHIFT SPA_MINBLOCKSHIFT
#define DEFAULT_MIRRORS 2
#define DEFAULT_RAID_CHILDREN 4
#define DEFAULT_RAID_PARITY 1
#define DEFAULT_DRAID_DATA 4
#define DEFAULT_DRAID_SPARES 1
#define DEFAULT_DATASETS_COUNT 7
#define DEFAULT_THREADS 23
#define DEFAULT_RUN_TIME 300 /* 300 seconds */
#define DEFAULT_RUN_TIME_STR "300 sec"
#define DEFAULT_PASS_TIME 60 /* 60 seconds */
#define DEFAULT_PASS_TIME_STR "60 sec"
#define DEFAULT_KILL_RATE 70 /* 70% kill rate */
#define DEFAULT_KILLRATE_STR "70%"
#define DEFAULT_INITS 1
#define DEFAULT_MAX_LOOPS 50 /* 5 minutes */
#define DEFAULT_FORCE_GANGING (64 << 10)
#define DEFAULT_FORCE_GANGING_STR "64K"
/* Simplifying assumption: -1 is not a valid default. */
#define NO_DEFAULT -1
static const ztest_shared_opts_t ztest_opts_defaults = {
.zo_pool = DEFAULT_POOL,
.zo_dir = DEFAULT_VDEV_DIR,
.zo_alt_ztest = { '\0' },
.zo_alt_libpath = { '\0' },
.zo_vdevs = DEFAULT_VDEV_COUNT,
.zo_ashift = DEFAULT_ASHIFT,
.zo_mirrors = DEFAULT_MIRRORS,
.zo_raid_children = DEFAULT_RAID_CHILDREN,
.zo_raid_parity = DEFAULT_RAID_PARITY,
.zo_raid_type = VDEV_TYPE_RAIDZ,
.zo_vdev_size = DEFAULT_VDEV_SIZE,
.zo_draid_data = DEFAULT_DRAID_DATA, /* data drives */
.zo_draid_spares = DEFAULT_DRAID_SPARES, /* distributed spares */
.zo_datasets = DEFAULT_DATASETS_COUNT,
.zo_threads = DEFAULT_THREADS,
.zo_passtime = DEFAULT_PASS_TIME,
.zo_killrate = DEFAULT_KILL_RATE,
.zo_verbose = 0,
.zo_mmp_test = 0,
.zo_init = DEFAULT_INITS,
.zo_time = DEFAULT_RUN_TIME,
.zo_maxloops = DEFAULT_MAX_LOOPS, /* max loops during spa_freeze() */
.zo_metaslab_force_ganging = DEFAULT_FORCE_GANGING,
.zo_special_vdevs = ZTEST_VDEV_CLASS_RND,
.zo_gvars_count = 0,
};
extern uint64_t metaslab_force_ganging;
extern uint64_t metaslab_df_alloc_threshold;
extern unsigned long zfs_deadman_synctime_ms;
extern int metaslab_preload_limit;
extern boolean_t zfs_compressed_arc_enabled;
extern int zfs_abd_scatter_enabled;
extern int dmu_object_alloc_chunk_shift;
extern boolean_t zfs_force_some_double_word_sm_entries;
extern unsigned long zio_decompress_fail_fraction;
extern unsigned long zfs_reconstruct_indirect_damage_fraction;
static ztest_shared_opts_t *ztest_shared_opts;
static ztest_shared_opts_t ztest_opts;
static char *ztest_wkeydata = "abcdefghijklmnopqrstuvwxyz012345";
typedef struct ztest_shared_ds {
uint64_t zd_seq;
} ztest_shared_ds_t;
static ztest_shared_ds_t *ztest_shared_ds;
#define ZTEST_GET_SHARED_DS(d) (&ztest_shared_ds[d])
#define BT_MAGIC 0x123456789abcdefULL
#define MAXFAULTS(zs) \
(MAX((zs)->zs_mirrors, 1) * (ztest_opts.zo_raid_parity + 1) - 1)
enum ztest_io_type {
ZTEST_IO_WRITE_TAG,
ZTEST_IO_WRITE_PATTERN,
ZTEST_IO_WRITE_ZEROES,
ZTEST_IO_TRUNCATE,
ZTEST_IO_SETATTR,
ZTEST_IO_REWRITE,
ZTEST_IO_TYPES
};
typedef struct ztest_block_tag {
uint64_t bt_magic;
uint64_t bt_objset;
uint64_t bt_object;
uint64_t bt_dnodesize;
uint64_t bt_offset;
uint64_t bt_gen;
uint64_t bt_txg;
uint64_t bt_crtxg;
} ztest_block_tag_t;
typedef struct bufwad {
uint64_t bw_index;
uint64_t bw_txg;
uint64_t bw_data;
} bufwad_t;
/*
* It would be better to use a rangelock_t per object. Unfortunately
* the rangelock_t is not a drop-in replacement for rl_t, because we
* still need to map from object ID to rangelock_t.
*/
typedef enum {
RL_READER,
RL_WRITER,
RL_APPEND
} rl_type_t;
typedef struct rll {
void *rll_writer;
int rll_readers;
kmutex_t rll_lock;
kcondvar_t rll_cv;
} rll_t;
typedef struct rl {
uint64_t rl_object;
uint64_t rl_offset;
uint64_t rl_size;
rll_t *rl_lock;
} rl_t;
#define ZTEST_RANGE_LOCKS 64
#define ZTEST_OBJECT_LOCKS 64
/*
* Object descriptor. Used as a template for object lookup/create/remove.
*/
typedef struct ztest_od {
uint64_t od_dir;
uint64_t od_object;
dmu_object_type_t od_type;
dmu_object_type_t od_crtype;
uint64_t od_blocksize;
uint64_t od_crblocksize;
uint64_t od_crdnodesize;
uint64_t od_gen;
uint64_t od_crgen;
char od_name[ZFS_MAX_DATASET_NAME_LEN];
} ztest_od_t;
/*
* Per-dataset state.
*/
typedef struct ztest_ds {
ztest_shared_ds_t *zd_shared;
objset_t *zd_os;
pthread_rwlock_t zd_zilog_lock;
zilog_t *zd_zilog;
ztest_od_t *zd_od; /* debugging aid */
char zd_name[ZFS_MAX_DATASET_NAME_LEN];
kmutex_t zd_dirobj_lock;
rll_t zd_object_lock[ZTEST_OBJECT_LOCKS];
rll_t zd_range_lock[ZTEST_RANGE_LOCKS];
} ztest_ds_t;
/*
* Per-iteration state.
*/
typedef void ztest_func_t(ztest_ds_t *zd, uint64_t id);
typedef struct ztest_info {
ztest_func_t *zi_func; /* test function */
uint64_t zi_iters; /* iterations per execution */
uint64_t *zi_interval; /* execute every <interval> seconds */
const char *zi_funcname; /* name of test function */
} ztest_info_t;
typedef struct ztest_shared_callstate {
uint64_t zc_count; /* per-pass count */
uint64_t zc_time; /* per-pass time */
uint64_t zc_next; /* next time to call this function */
} ztest_shared_callstate_t;
static ztest_shared_callstate_t *ztest_shared_callstate;
#define ZTEST_GET_SHARED_CALLSTATE(c) (&ztest_shared_callstate[c])
ztest_func_t ztest_dmu_read_write;
ztest_func_t ztest_dmu_write_parallel;
ztest_func_t ztest_dmu_object_alloc_free;
ztest_func_t ztest_dmu_object_next_chunk;
ztest_func_t ztest_dmu_commit_callbacks;
ztest_func_t ztest_zap;
ztest_func_t ztest_zap_parallel;
ztest_func_t ztest_zil_commit;
ztest_func_t ztest_zil_remount;
ztest_func_t ztest_dmu_read_write_zcopy;
ztest_func_t ztest_dmu_objset_create_destroy;
ztest_func_t ztest_dmu_prealloc;
ztest_func_t ztest_fzap;
ztest_func_t ztest_dmu_snapshot_create_destroy;
ztest_func_t ztest_dsl_prop_get_set;
ztest_func_t ztest_spa_prop_get_set;
ztest_func_t ztest_spa_create_destroy;
ztest_func_t ztest_fault_inject;
ztest_func_t ztest_dmu_snapshot_hold;
ztest_func_t ztest_mmp_enable_disable;
ztest_func_t ztest_scrub;
ztest_func_t ztest_dsl_dataset_promote_busy;
ztest_func_t ztest_vdev_attach_detach;
ztest_func_t ztest_vdev_LUN_growth;
ztest_func_t ztest_vdev_add_remove;
ztest_func_t ztest_vdev_class_add;
ztest_func_t ztest_vdev_aux_add_remove;
ztest_func_t ztest_split_pool;
ztest_func_t ztest_reguid;
ztest_func_t ztest_spa_upgrade;
ztest_func_t ztest_device_removal;
ztest_func_t ztest_spa_checkpoint_create_discard;
ztest_func_t ztest_initialize;
ztest_func_t ztest_trim;
ztest_func_t ztest_fletcher;
ztest_func_t ztest_fletcher_incr;
ztest_func_t ztest_verify_dnode_bt;
uint64_t zopt_always = 0ULL * NANOSEC; /* all the time */
uint64_t zopt_incessant = 1ULL * NANOSEC / 10; /* every 1/10 second */
uint64_t zopt_often = 1ULL * NANOSEC; /* every second */
uint64_t zopt_sometimes = 10ULL * NANOSEC; /* every 10 seconds */
uint64_t zopt_rarely = 60ULL * NANOSEC; /* every 60 seconds */
#define ZTI_INIT(func, iters, interval) \
{ .zi_func = (func), \
.zi_iters = (iters), \
.zi_interval = (interval), \
.zi_funcname = # func }
ztest_info_t ztest_info[] = {
ZTI_INIT(ztest_dmu_read_write, 1, &zopt_always),
ZTI_INIT(ztest_dmu_write_parallel, 10, &zopt_always),
ZTI_INIT(ztest_dmu_object_alloc_free, 1, &zopt_always),
ZTI_INIT(ztest_dmu_object_next_chunk, 1, &zopt_sometimes),
ZTI_INIT(ztest_dmu_commit_callbacks, 1, &zopt_always),
ZTI_INIT(ztest_zap, 30, &zopt_always),
ZTI_INIT(ztest_zap_parallel, 100, &zopt_always),
ZTI_INIT(ztest_split_pool, 1, &zopt_always),
ZTI_INIT(ztest_zil_commit, 1, &zopt_incessant),
ZTI_INIT(ztest_zil_remount, 1, &zopt_sometimes),
ZTI_INIT(ztest_dmu_read_write_zcopy, 1, &zopt_often),
ZTI_INIT(ztest_dmu_objset_create_destroy, 1, &zopt_often),
ZTI_INIT(ztest_dsl_prop_get_set, 1, &zopt_often),
ZTI_INIT(ztest_spa_prop_get_set, 1, &zopt_sometimes),
#if 0
ZTI_INIT(ztest_dmu_prealloc, 1, &zopt_sometimes),
#endif
ZTI_INIT(ztest_fzap, 1, &zopt_sometimes),
ZTI_INIT(ztest_dmu_snapshot_create_destroy, 1, &zopt_sometimes),
ZTI_INIT(ztest_spa_create_destroy, 1, &zopt_sometimes),
ZTI_INIT(ztest_fault_inject, 1, &zopt_sometimes),
ZTI_INIT(ztest_dmu_snapshot_hold, 1, &zopt_sometimes),
ZTI_INIT(ztest_mmp_enable_disable, 1, &zopt_sometimes),
ZTI_INIT(ztest_reguid, 1, &zopt_rarely),
ZTI_INIT(ztest_scrub, 1, &zopt_rarely),
ZTI_INIT(ztest_spa_upgrade, 1, &zopt_rarely),
ZTI_INIT(ztest_dsl_dataset_promote_busy, 1, &zopt_rarely),
ZTI_INIT(ztest_vdev_attach_detach, 1, &zopt_sometimes),
ZTI_INIT(ztest_vdev_LUN_growth, 1, &zopt_rarely),
ZTI_INIT(ztest_vdev_add_remove, 1, &ztest_opts.zo_vdevtime),
ZTI_INIT(ztest_vdev_class_add, 1, &ztest_opts.zo_vdevtime),
ZTI_INIT(ztest_vdev_aux_add_remove, 1, &ztest_opts.zo_vdevtime),
ZTI_INIT(ztest_device_removal, 1, &zopt_sometimes),
ZTI_INIT(ztest_spa_checkpoint_create_discard, 1, &zopt_rarely),
ZTI_INIT(ztest_initialize, 1, &zopt_sometimes),
ZTI_INIT(ztest_trim, 1, &zopt_sometimes),
ZTI_INIT(ztest_fletcher, 1, &zopt_rarely),
ZTI_INIT(ztest_fletcher_incr, 1, &zopt_rarely),
ZTI_INIT(ztest_verify_dnode_bt, 1, &zopt_sometimes),
};
#define ZTEST_FUNCS (sizeof (ztest_info) / sizeof (ztest_info_t))
/*
* The following struct is used to hold a list of uncalled commit callbacks.
* The callbacks are ordered by txg number.
*/
typedef struct ztest_cb_list {
kmutex_t zcl_callbacks_lock;
list_t zcl_callbacks;
} ztest_cb_list_t;
/*
* Stuff we need to share writably between parent and child.
*/
typedef struct ztest_shared {
boolean_t zs_do_init;
hrtime_t zs_proc_start;
hrtime_t zs_proc_stop;
hrtime_t zs_thread_start;
hrtime_t zs_thread_stop;
hrtime_t zs_thread_kill;
uint64_t zs_enospc_count;
uint64_t zs_vdev_next_leaf;
uint64_t zs_vdev_aux;
uint64_t zs_alloc;
uint64_t zs_space;
uint64_t zs_splits;
uint64_t zs_mirrors;
uint64_t zs_metaslab_sz;
uint64_t zs_metaslab_df_alloc_threshold;
uint64_t zs_guid;
} ztest_shared_t;
#define ID_PARALLEL -1ULL
static char ztest_dev_template[] = "%s/%s.%llua";
static char ztest_aux_template[] = "%s/%s.%s.%llu";
ztest_shared_t *ztest_shared;
static spa_t *ztest_spa = NULL;
static ztest_ds_t *ztest_ds;
static kmutex_t ztest_vdev_lock;
static boolean_t ztest_device_removal_active = B_FALSE;
static boolean_t ztest_pool_scrubbed = B_FALSE;
static kmutex_t ztest_checkpoint_lock;
/*
* The ztest_name_lock protects the pool and dataset namespace used by
* the individual tests. To modify the namespace, consumers must grab
* this lock as writer. Grabbing the lock as reader will ensure that the
* namespace does not change while the lock is held.
*/
static pthread_rwlock_t ztest_name_lock;
static boolean_t ztest_dump_core = B_TRUE;
static boolean_t ztest_exiting;
/* Global commit callback list */
static ztest_cb_list_t zcl;
/* Commit cb delay */
static uint64_t zc_min_txg_delay = UINT64_MAX;
static int zc_cb_counter = 0;
/*
* Minimum number of commit callbacks that need to be registered for us to check
* whether the minimum txg delay is acceptable.
*/
#define ZTEST_COMMIT_CB_MIN_REG 100
/*
* If a number of txgs equal to this threshold have been created after a commit
* callback has been registered but not called, then we assume there is an
* implementation bug.
*/
#define ZTEST_COMMIT_CB_THRESH (TXG_CONCURRENT_STATES + 1000)
enum ztest_object {
ZTEST_META_DNODE = 0,
ZTEST_DIROBJ,
ZTEST_OBJECTS
};
static void usage(boolean_t) __NORETURN;
static int ztest_scrub_impl(spa_t *spa);
/*
* These libumem hooks provide a reasonable set of defaults for the allocator's
* debugging facilities.
*/
const char *
_umem_debug_init(void)
{
return ("default,verbose"); /* $UMEM_DEBUG setting */
}
const char *
_umem_logging_init(void)
{
return ("fail,contents"); /* $UMEM_LOGGING setting */
}
static void
dump_debug_buffer(void)
{
ssize_t ret __attribute__((unused));
if (!ztest_opts.zo_dump_dbgmsg)
return;
/*
* We use write() instead of printf() so that this function
* is safe to call from a signal handler.
*/
ret = write(STDOUT_FILENO, "\n", 1);
zfs_dbgmsg_print("ztest");
}
#define BACKTRACE_SZ 100
static void sig_handler(int signo)
{
struct sigaction action;
#if (__GLIBC__ && !__UCLIBC__) /* backtrace() is a GNU extension */
int nptrs;
void *buffer[BACKTRACE_SZ];
nptrs = backtrace(buffer, BACKTRACE_SZ);
backtrace_symbols_fd(buffer, nptrs, STDERR_FILENO);
#endif
dump_debug_buffer();
/*
* Restore default action and re-raise signal so SIGSEGV and
* SIGABRT can trigger a core dump.
*/
action.sa_handler = SIG_DFL;
sigemptyset(&action.sa_mask);
action.sa_flags = 0;
(void) sigaction(signo, &action, NULL);
raise(signo);
}
#define FATAL_MSG_SZ 1024
char *fatal_msg;
static void
fatal(int do_perror, char *message, ...)
{
va_list args;
int save_errno = errno;
char *buf;
(void) fflush(stdout);
buf = umem_alloc(FATAL_MSG_SZ, UMEM_NOFAIL);
va_start(args, message);
(void) sprintf(buf, "ztest: ");
/* LINTED */
(void) vsprintf(buf + strlen(buf), message, args);
va_end(args);
if (do_perror) {
(void) snprintf(buf + strlen(buf), FATAL_MSG_SZ - strlen(buf),
": %s", strerror(save_errno));
}
(void) fprintf(stderr, "%s\n", buf);
fatal_msg = buf; /* to ease debugging */
if (ztest_dump_core)
abort();
else
dump_debug_buffer();
exit(3);
}
static int
str2shift(const char *buf)
{
const char *ends = "BKMGTPEZ";
int i;
if (buf[0] == '\0')
return (0);
for (i = 0; i < strlen(ends); i++) {
if (toupper(buf[0]) == ends[i])
break;
}
if (i == strlen(ends)) {
(void) fprintf(stderr, "ztest: invalid bytes suffix: %s\n",
buf);
usage(B_FALSE);
}
if (buf[1] == '\0' || (toupper(buf[1]) == 'B' && buf[2] == '\0')) {
return (10*i);
}
(void) fprintf(stderr, "ztest: invalid bytes suffix: %s\n", buf);
usage(B_FALSE);
/* NOTREACHED */
}
static uint64_t
nicenumtoull(const char *buf)
{
char *end;
uint64_t val;
val = strtoull(buf, &end, 0);
if (end == buf) {
(void) fprintf(stderr, "ztest: bad numeric value: %s\n", buf);
usage(B_FALSE);
} else if (end[0] == '.') {
double fval = strtod(buf, &end);
fval *= pow(2, str2shift(end));
/*
* UINT64_MAX is not exactly representable as a double.
* The closest representation is UINT64_MAX + 1, so we
* use a >= comparison instead of > for the bounds check.
*/
if (fval >= (double)UINT64_MAX) {
(void) fprintf(stderr, "ztest: value too large: %s\n",
buf);
usage(B_FALSE);
}
val = (uint64_t)fval;
} else {
int shift = str2shift(end);
if (shift >= 64 || (val << shift) >> shift != val) {
(void) fprintf(stderr, "ztest: value too large: %s\n",
buf);
usage(B_FALSE);
}
val <<= shift;
}
return (val);
}
typedef struct ztest_option {
const char short_opt;
const char *long_opt;
const char *long_opt_param;
const char *comment;
unsigned int default_int;
char *default_str;
} ztest_option_t;
/*
* The following option_table is used for generating the usage info as well as
* the long and short option information for calling getopt_long().
*/
static ztest_option_t option_table[] = {
{ 'v', "vdevs", "INTEGER", "Number of vdevs", DEFAULT_VDEV_COUNT,
NULL},
{ 's', "vdev-size", "INTEGER", "Size of each vdev",
NO_DEFAULT, DEFAULT_VDEV_SIZE_STR},
{ 'a', "alignment-shift", "INTEGER",
"Alignment shift; use 0 for random", DEFAULT_ASHIFT, NULL},
{ 'm', "mirror-copies", "INTEGER", "Number of mirror copies",
DEFAULT_MIRRORS, NULL},
{ 'r', "raid-disks", "INTEGER", "Number of raidz/draid disks",
DEFAULT_RAID_CHILDREN, NULL},
{ 'R', "raid-parity", "INTEGER", "Raid parity",
DEFAULT_RAID_PARITY, NULL},
{ 'K', "raid-kind", "raidz|draid|random", "Raid kind",
NO_DEFAULT, "random"},
{ 'D', "draid-data", "INTEGER", "Number of draid data drives",
DEFAULT_DRAID_DATA, NULL},
{ 'S', "draid-spares", "INTEGER", "Number of draid spares",
DEFAULT_DRAID_SPARES, NULL},
{ 'd', "datasets", "INTEGER", "Number of datasets",
DEFAULT_DATASETS_COUNT, NULL},
{ 't', "threads", "INTEGER", "Number of ztest threads",
DEFAULT_THREADS, NULL},
{ 'g', "gang-block-threshold", "INTEGER",
"Metaslab gang block threshold",
NO_DEFAULT, DEFAULT_FORCE_GANGING_STR},
{ 'i', "init-count", "INTEGER", "Number of times to initialize pool",
DEFAULT_INITS, NULL},
{ 'k', "kill-percentage", "INTEGER", "Kill percentage",
NO_DEFAULT, DEFAULT_KILLRATE_STR},
{ 'p', "pool-name", "STRING", "Pool name",
NO_DEFAULT, DEFAULT_POOL},
{ 'f', "vdev-file-directory", "PATH", "File directory for vdev files",
NO_DEFAULT, DEFAULT_VDEV_DIR},
{ 'M', "multi-host", NULL,
"Multi-host; simulate pool imported on remote host",
NO_DEFAULT, NULL},
{ 'E', "use-existing-pool", NULL,
"Use existing pool instead of creating new one", NO_DEFAULT, NULL},
{ 'T', "run-time", "INTEGER", "Total run time",
NO_DEFAULT, DEFAULT_RUN_TIME_STR},
{ 'P', "pass-time", "INTEGER", "Time per pass",
NO_DEFAULT, DEFAULT_PASS_TIME_STR},
{ 'F', "freeze-loops", "INTEGER", "Max loops in spa_freeze()",
DEFAULT_MAX_LOOPS, NULL},
{ 'B', "alt-ztest", "PATH", "Alternate ztest path",
NO_DEFAULT, NULL},
{ 'C', "vdev-class-state", "on|off|random", "vdev class state",
NO_DEFAULT, "random"},
{ 'o', "option", "\"OPTION=INTEGER\"",
"Set global variable to an unsigned 32-bit integer value",
NO_DEFAULT, NULL},
{ 'G', "dump-debug-msg", NULL,
"Dump zfs_dbgmsg buffer before exiting due to an error",
NO_DEFAULT, NULL},
{ 'V', "verbose", NULL,
"Verbose (use multiple times for ever more verbosity)",
NO_DEFAULT, NULL},
{ 'h', "help", NULL, "Show this help",
NO_DEFAULT, NULL},
{0, 0, 0, 0, 0, 0}
};
static struct option *long_opts = NULL;
static char *short_opts = NULL;
static void
init_options(void)
{
ASSERT3P(long_opts, ==, NULL);
ASSERT3P(short_opts, ==, NULL);
int count = sizeof (option_table) / sizeof (option_table[0]);
long_opts = umem_alloc(sizeof (struct option) * count, UMEM_NOFAIL);
short_opts = umem_alloc(sizeof (char) * 2 * count, UMEM_NOFAIL);
int short_opt_index = 0;
for (int i = 0; i < count; i++) {
long_opts[i].val = option_table[i].short_opt;
long_opts[i].name = option_table[i].long_opt;
long_opts[i].has_arg = option_table[i].long_opt_param != NULL
? required_argument : no_argument;
long_opts[i].flag = NULL;
short_opts[short_opt_index++] = option_table[i].short_opt;
if (option_table[i].long_opt_param != NULL) {
short_opts[short_opt_index++] = ':';
}
}
}
static void
fini_options(void)
{
int count = sizeof (option_table) / sizeof (option_table[0]);
umem_free(long_opts, sizeof (struct option) * count);
umem_free(short_opts, sizeof (char) * 2 * count);
long_opts = NULL;
short_opts = NULL;
}
static void
usage(boolean_t requested)
{
char option[80];
FILE *fp = requested ? stdout : stderr;
(void) fprintf(fp, "Usage: %s [OPTIONS...]\n", DEFAULT_POOL);
for (int i = 0; option_table[i].short_opt != 0; i++) {
if (option_table[i].long_opt_param != NULL) {
(void) sprintf(option, " -%c --%s=%s",
option_table[i].short_opt,
option_table[i].long_opt,
option_table[i].long_opt_param);
} else {
(void) sprintf(option, " -%c --%s",
option_table[i].short_opt,
option_table[i].long_opt);
}
(void) fprintf(fp, " %-40s%s", option,
option_table[i].comment);
if (option_table[i].long_opt_param != NULL) {
if (option_table[i].default_str != NULL) {
(void) fprintf(fp, " (default: %s)",
option_table[i].default_str);
} else if (option_table[i].default_int != NO_DEFAULT) {
(void) fprintf(fp, " (default: %u)",
option_table[i].default_int);
}
}
(void) fprintf(fp, "\n");
}
exit(requested ? 0 : 1);
}
static uint64_t
ztest_random(uint64_t range)
{
uint64_t r;
ASSERT3S(ztest_fd_rand, >=, 0);
if (range == 0)
return (0);
if (read(ztest_fd_rand, &r, sizeof (r)) != sizeof (r))
fatal(1, "short read from /dev/urandom");
return (r % range);
}
static void
ztest_parse_name_value(const char *input, ztest_shared_opts_t *zo)
{
char name[32];
char *value;
int state = ZTEST_VDEV_CLASS_RND;
(void) strlcpy(name, input, sizeof (name));
value = strchr(name, '=');
if (value == NULL) {
(void) fprintf(stderr, "missing value in property=value "
"'-C' argument (%s)\n", input);
usage(B_FALSE);
}
*(value) = '\0';
value++;
if (strcmp(value, "on") == 0) {
state = ZTEST_VDEV_CLASS_ON;
} else if (strcmp(value, "off") == 0) {
state = ZTEST_VDEV_CLASS_OFF;
} else if (strcmp(value, "random") == 0) {
state = ZTEST_VDEV_CLASS_RND;
} else {
(void) fprintf(stderr, "invalid property value '%s'\n", value);
usage(B_FALSE);
}
if (strcmp(name, "special") == 0) {
zo->zo_special_vdevs = state;
} else {
(void) fprintf(stderr, "invalid property name '%s'\n", name);
usage(B_FALSE);
}
if (zo->zo_verbose >= 3)
(void) printf("%s vdev state is '%s'\n", name, value);
}
static void
process_options(int argc, char **argv)
{
char *path;
ztest_shared_opts_t *zo = &ztest_opts;
int opt;
uint64_t value;
char altdir[MAXNAMELEN] = { 0 };
char raid_kind[8] = { "random" };
bcopy(&ztest_opts_defaults, zo, sizeof (*zo));
init_options();
while ((opt = getopt_long(argc, argv, short_opts, long_opts,
NULL)) != EOF) {
value = 0;
switch (opt) {
case 'v':
case 's':
case 'a':
case 'm':
case 'r':
case 'R':
case 'D':
case 'S':
case 'd':
case 't':
case 'g':
case 'i':
case 'k':
case 'T':
case 'P':
case 'F':
value = nicenumtoull(optarg);
}
switch (opt) {
case 'v':
zo->zo_vdevs = value;
break;
case 's':
zo->zo_vdev_size = MAX(SPA_MINDEVSIZE, value);
break;
case 'a':
zo->zo_ashift = value;
break;
case 'm':
zo->zo_mirrors = value;
break;
case 'r':
zo->zo_raid_children = MAX(1, value);
break;
case 'R':
zo->zo_raid_parity = MIN(MAX(value, 1), 3);
break;
case 'K':
(void) strlcpy(raid_kind, optarg, sizeof (raid_kind));
break;
case 'D':
zo->zo_draid_data = MAX(1, value);
break;
case 'S':
zo->zo_draid_spares = MAX(1, value);
break;
case 'd':
zo->zo_datasets = MAX(1, value);
break;
case 't':
zo->zo_threads = MAX(1, value);
break;
case 'g':
zo->zo_metaslab_force_ganging =
MAX(SPA_MINBLOCKSIZE << 1, value);
break;
case 'i':
zo->zo_init = value;
break;
case 'k':