Notable upstream pull request merges:
#14744 Optimize check_filesystem() and process_error_log()
#14773 Allow zhack label repair to restore detached devices
#14794 zpool import -m also removing spare and cache when log device
is missing
#14805 Simplify and optimize random_int_between()
#14813 Enable the head_errlog feature to remove errors
#14816 Fix two abd_gang_add_gang() issues
#14817 Verify block pointers before writing them out
#14819 Add dmu_tx_hold_append() interface
#14823 Remove single parent assertion from zio_nowait()
#14824 Plug memory leak in zfsdev_state
#14825 Block cloning dbuf fixes
#14828 Remove duplicate code in l2arc_evict()
#14837 Fixes in head_errlog feature with encryption
#14839 Prevent panic during concurrent snapshot rollback and zvol read
#14853 zil: Don't expect zio_shrink() to succeed
Obtained from: OpenZFS
OpenZFS commit: e610766838
1027 lines
25 KiB
C
1027 lines
25 KiB
C
/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License (the "License").
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* You may not use this file except in compliance with the License.
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*
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* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
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* or https://opensource.org/licenses/CDDL-1.0.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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* If applicable, add the following below this CDDL HEADER, with the
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* fields enclosed by brackets "[]" replaced with your own identifying
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* information: Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*/
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/*
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* Copyright (c) 2011, 2015 by Delphix. All rights reserved.
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* Copyright (c) 2013 Steven Hartland. All rights reserved.
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*/
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/*
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* zhack is a debugging tool that can write changes to ZFS pool using libzpool
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* for testing purposes. Altering pools with zhack is unsupported and may
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* result in corrupted pools.
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*/
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#include <zfs_prop.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <ctype.h>
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#include <sys/stat.h>
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#include <sys/zfs_context.h>
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#include <sys/spa.h>
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#include <sys/spa_impl.h>
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#include <sys/dmu.h>
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#include <sys/zap.h>
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#include <sys/zfs_znode.h>
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#include <sys/dsl_synctask.h>
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#include <sys/vdev.h>
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#include <sys/vdev_impl.h>
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#include <sys/fs/zfs.h>
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#include <sys/dmu_objset.h>
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#include <sys/dsl_pool.h>
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#include <sys/zio_checksum.h>
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#include <sys/zio_compress.h>
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#include <sys/zfeature.h>
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#include <sys/dmu_tx.h>
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#include <zfeature_common.h>
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#include <libzutil.h>
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static importargs_t g_importargs;
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static char *g_pool;
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static boolean_t g_readonly;
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typedef enum {
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ZHACK_REPAIR_OP_UNKNOWN = 0,
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ZHACK_REPAIR_OP_CKSUM = (1 << 0),
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ZHACK_REPAIR_OP_UNDETACH = (1 << 1)
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} zhack_repair_op_t;
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static __attribute__((noreturn)) void
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usage(void)
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{
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(void) fprintf(stderr,
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"Usage: zhack [-c cachefile] [-d dir] <subcommand> <args> ...\n"
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"where <subcommand> <args> is one of the following:\n"
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"\n");
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(void) fprintf(stderr,
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" feature stat <pool>\n"
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" print information about enabled features\n"
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" feature enable [-r] [-d desc] <pool> <feature>\n"
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" add a new enabled feature to the pool\n"
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" -d <desc> sets the feature's description\n"
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" -r set read-only compatible flag for feature\n"
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" feature ref [-md] <pool> <feature>\n"
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" change the refcount on the given feature\n"
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" -d decrease instead of increase the refcount\n"
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" -m add the feature to the label if increasing refcount\n"
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"\n"
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" <feature> : should be a feature guid\n"
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"\n"
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" label repair <device>\n"
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" repair labels of a specified device according to options\n"
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" which may be combined to do their functions in one call\n"
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" -c repair corrupted label checksums\n"
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" -u restore the label on a detached device\n"
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"\n"
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" <device> : path to vdev\n");
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exit(1);
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}
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static __attribute__((format(printf, 3, 4))) __attribute__((noreturn)) void
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fatal(spa_t *spa, const void *tag, const char *fmt, ...)
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{
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va_list ap;
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if (spa != NULL) {
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spa_close(spa, tag);
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(void) spa_export(g_pool, NULL, B_TRUE, B_FALSE);
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}
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va_start(ap, fmt);
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(void) fputs("zhack: ", stderr);
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(void) vfprintf(stderr, fmt, ap);
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va_end(ap);
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(void) fputc('\n', stderr);
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exit(1);
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}
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static int
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space_delta_cb(dmu_object_type_t bonustype, const void *data,
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zfs_file_info_t *zoi)
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{
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(void) data, (void) zoi;
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/*
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* Is it a valid type of object to track?
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*/
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if (bonustype != DMU_OT_ZNODE && bonustype != DMU_OT_SA)
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return (ENOENT);
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(void) fprintf(stderr, "modifying object that needs user accounting");
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abort();
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}
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/*
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* Target is the dataset whose pool we want to open.
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*/
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static void
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zhack_import(char *target, boolean_t readonly)
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{
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nvlist_t *config;
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nvlist_t *props;
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int error;
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kernel_init(readonly ? SPA_MODE_READ :
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(SPA_MODE_READ | SPA_MODE_WRITE));
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dmu_objset_register_type(DMU_OST_ZFS, space_delta_cb);
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g_readonly = readonly;
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g_importargs.can_be_active = readonly;
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g_pool = strdup(target);
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libpc_handle_t lpch = {
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.lpc_lib_handle = NULL,
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.lpc_ops = &libzpool_config_ops,
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.lpc_printerr = B_TRUE
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};
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error = zpool_find_config(&lpch, target, &config, &g_importargs);
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if (error)
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fatal(NULL, FTAG, "cannot import '%s'", target);
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props = NULL;
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if (readonly) {
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VERIFY(nvlist_alloc(&props, NV_UNIQUE_NAME, 0) == 0);
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VERIFY(nvlist_add_uint64(props,
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zpool_prop_to_name(ZPOOL_PROP_READONLY), 1) == 0);
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}
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zfeature_checks_disable = B_TRUE;
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error = spa_import(target, config, props,
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(readonly ? ZFS_IMPORT_SKIP_MMP : ZFS_IMPORT_NORMAL));
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fnvlist_free(config);
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zfeature_checks_disable = B_FALSE;
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if (error == EEXIST)
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error = 0;
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if (error)
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fatal(NULL, FTAG, "can't import '%s': %s", target,
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strerror(error));
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}
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static void
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zhack_spa_open(char *target, boolean_t readonly, const void *tag, spa_t **spa)
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{
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int err;
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zhack_import(target, readonly);
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zfeature_checks_disable = B_TRUE;
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err = spa_open(target, spa, tag);
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zfeature_checks_disable = B_FALSE;
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if (err != 0)
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fatal(*spa, FTAG, "cannot open '%s': %s", target,
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strerror(err));
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if (spa_version(*spa) < SPA_VERSION_FEATURES) {
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fatal(*spa, FTAG, "'%s' has version %d, features not enabled",
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target, (int)spa_version(*spa));
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}
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}
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static void
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dump_obj(objset_t *os, uint64_t obj, const char *name)
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{
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zap_cursor_t zc;
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zap_attribute_t za;
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(void) printf("%s_obj:\n", name);
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for (zap_cursor_init(&zc, os, obj);
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zap_cursor_retrieve(&zc, &za) == 0;
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zap_cursor_advance(&zc)) {
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if (za.za_integer_length == 8) {
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ASSERT(za.za_num_integers == 1);
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(void) printf("\t%s = %llu\n",
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za.za_name, (u_longlong_t)za.za_first_integer);
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} else {
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ASSERT(za.za_integer_length == 1);
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char val[1024];
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VERIFY(zap_lookup(os, obj, za.za_name,
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1, sizeof (val), val) == 0);
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(void) printf("\t%s = %s\n", za.za_name, val);
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}
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}
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zap_cursor_fini(&zc);
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}
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static void
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dump_mos(spa_t *spa)
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{
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nvlist_t *nv = spa->spa_label_features;
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nvpair_t *pair;
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(void) printf("label config:\n");
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for (pair = nvlist_next_nvpair(nv, NULL);
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pair != NULL;
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pair = nvlist_next_nvpair(nv, pair)) {
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(void) printf("\t%s\n", nvpair_name(pair));
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}
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}
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static void
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zhack_do_feature_stat(int argc, char **argv)
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{
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spa_t *spa;
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objset_t *os;
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char *target;
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argc--;
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argv++;
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if (argc < 1) {
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(void) fprintf(stderr, "error: missing pool name\n");
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usage();
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}
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target = argv[0];
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zhack_spa_open(target, B_TRUE, FTAG, &spa);
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os = spa->spa_meta_objset;
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dump_obj(os, spa->spa_feat_for_read_obj, "for_read");
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dump_obj(os, spa->spa_feat_for_write_obj, "for_write");
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dump_obj(os, spa->spa_feat_desc_obj, "descriptions");
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if (spa_feature_is_active(spa, SPA_FEATURE_ENABLED_TXG)) {
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dump_obj(os, spa->spa_feat_enabled_txg_obj, "enabled_txg");
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}
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dump_mos(spa);
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spa_close(spa, FTAG);
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}
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static void
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zhack_feature_enable_sync(void *arg, dmu_tx_t *tx)
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{
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spa_t *spa = dmu_tx_pool(tx)->dp_spa;
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zfeature_info_t *feature = arg;
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feature_enable_sync(spa, feature, tx);
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spa_history_log_internal(spa, "zhack enable feature", tx,
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"name=%s flags=%u",
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feature->fi_guid, feature->fi_flags);
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}
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static void
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zhack_do_feature_enable(int argc, char **argv)
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{
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int c;
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char *desc, *target;
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spa_t *spa;
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objset_t *mos;
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zfeature_info_t feature;
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const spa_feature_t nodeps[] = { SPA_FEATURE_NONE };
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/*
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* Features are not added to the pool's label until their refcounts
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* are incremented, so fi_mos can just be left as false for now.
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*/
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desc = NULL;
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feature.fi_uname = "zhack";
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feature.fi_flags = 0;
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feature.fi_depends = nodeps;
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feature.fi_feature = SPA_FEATURE_NONE;
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optind = 1;
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while ((c = getopt(argc, argv, "+rd:")) != -1) {
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switch (c) {
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case 'r':
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feature.fi_flags |= ZFEATURE_FLAG_READONLY_COMPAT;
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break;
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case 'd':
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if (desc != NULL)
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free(desc);
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desc = strdup(optarg);
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break;
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default:
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usage();
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break;
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}
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}
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if (desc == NULL)
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desc = strdup("zhack injected");
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feature.fi_desc = desc;
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argc -= optind;
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argv += optind;
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if (argc < 2) {
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(void) fprintf(stderr, "error: missing feature or pool name\n");
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usage();
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}
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target = argv[0];
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feature.fi_guid = argv[1];
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if (!zfeature_is_valid_guid(feature.fi_guid))
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fatal(NULL, FTAG, "invalid feature guid: %s", feature.fi_guid);
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zhack_spa_open(target, B_FALSE, FTAG, &spa);
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mos = spa->spa_meta_objset;
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if (zfeature_is_supported(feature.fi_guid))
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fatal(spa, FTAG, "'%s' is a real feature, will not enable",
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feature.fi_guid);
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if (0 == zap_contains(mos, spa->spa_feat_desc_obj, feature.fi_guid))
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fatal(spa, FTAG, "feature already enabled: %s",
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feature.fi_guid);
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VERIFY0(dsl_sync_task(spa_name(spa), NULL,
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zhack_feature_enable_sync, &feature, 5, ZFS_SPACE_CHECK_NORMAL));
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spa_close(spa, FTAG);
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free(desc);
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}
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static void
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feature_incr_sync(void *arg, dmu_tx_t *tx)
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{
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spa_t *spa = dmu_tx_pool(tx)->dp_spa;
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zfeature_info_t *feature = arg;
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uint64_t refcount;
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VERIFY0(feature_get_refcount_from_disk(spa, feature, &refcount));
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feature_sync(spa, feature, refcount + 1, tx);
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spa_history_log_internal(spa, "zhack feature incr", tx,
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"name=%s", feature->fi_guid);
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}
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static void
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feature_decr_sync(void *arg, dmu_tx_t *tx)
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{
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spa_t *spa = dmu_tx_pool(tx)->dp_spa;
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zfeature_info_t *feature = arg;
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uint64_t refcount;
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VERIFY0(feature_get_refcount_from_disk(spa, feature, &refcount));
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feature_sync(spa, feature, refcount - 1, tx);
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spa_history_log_internal(spa, "zhack feature decr", tx,
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"name=%s", feature->fi_guid);
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}
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static void
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zhack_do_feature_ref(int argc, char **argv)
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{
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int c;
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char *target;
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boolean_t decr = B_FALSE;
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spa_t *spa;
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objset_t *mos;
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zfeature_info_t feature;
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const spa_feature_t nodeps[] = { SPA_FEATURE_NONE };
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/*
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* fi_desc does not matter here because it was written to disk
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* when the feature was enabled, but we need to properly set the
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* feature for read or write based on the information we read off
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* disk later.
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*/
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feature.fi_uname = "zhack";
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feature.fi_flags = 0;
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feature.fi_desc = NULL;
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feature.fi_depends = nodeps;
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feature.fi_feature = SPA_FEATURE_NONE;
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optind = 1;
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while ((c = getopt(argc, argv, "+md")) != -1) {
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switch (c) {
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case 'm':
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feature.fi_flags |= ZFEATURE_FLAG_MOS;
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break;
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case 'd':
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decr = B_TRUE;
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break;
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default:
|
|
usage();
|
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break;
|
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}
|
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}
|
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argc -= optind;
|
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argv += optind;
|
|
|
|
if (argc < 2) {
|
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(void) fprintf(stderr, "error: missing feature or pool name\n");
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usage();
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}
|
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target = argv[0];
|
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feature.fi_guid = argv[1];
|
|
|
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if (!zfeature_is_valid_guid(feature.fi_guid))
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fatal(NULL, FTAG, "invalid feature guid: %s", feature.fi_guid);
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zhack_spa_open(target, B_FALSE, FTAG, &spa);
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mos = spa->spa_meta_objset;
|
|
|
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if (zfeature_is_supported(feature.fi_guid)) {
|
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fatal(spa, FTAG,
|
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"'%s' is a real feature, will not change refcount",
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feature.fi_guid);
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}
|
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if (0 == zap_contains(mos, spa->spa_feat_for_read_obj,
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feature.fi_guid)) {
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feature.fi_flags &= ~ZFEATURE_FLAG_READONLY_COMPAT;
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} else if (0 == zap_contains(mos, spa->spa_feat_for_write_obj,
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feature.fi_guid)) {
|
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feature.fi_flags |= ZFEATURE_FLAG_READONLY_COMPAT;
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|
} else {
|
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fatal(spa, FTAG, "feature is not enabled: %s", feature.fi_guid);
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}
|
|
|
|
if (decr) {
|
|
uint64_t count;
|
|
if (feature_get_refcount_from_disk(spa, &feature,
|
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&count) == 0 && count == 0) {
|
|
fatal(spa, FTAG, "feature refcount already 0: %s",
|
|
feature.fi_guid);
|
|
}
|
|
}
|
|
|
|
VERIFY0(dsl_sync_task(spa_name(spa), NULL,
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|
decr ? feature_decr_sync : feature_incr_sync, &feature,
|
|
5, ZFS_SPACE_CHECK_NORMAL));
|
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|
|
spa_close(spa, FTAG);
|
|
}
|
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|
|
static int
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|
zhack_do_feature(int argc, char **argv)
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|
{
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|
char *subcommand;
|
|
|
|
argc--;
|
|
argv++;
|
|
if (argc == 0) {
|
|
(void) fprintf(stderr,
|
|
"error: no feature operation specified\n");
|
|
usage();
|
|
}
|
|
|
|
subcommand = argv[0];
|
|
if (strcmp(subcommand, "stat") == 0) {
|
|
zhack_do_feature_stat(argc, argv);
|
|
} else if (strcmp(subcommand, "enable") == 0) {
|
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zhack_do_feature_enable(argc, argv);
|
|
} else if (strcmp(subcommand, "ref") == 0) {
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|
zhack_do_feature_ref(argc, argv);
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|
} else {
|
|
(void) fprintf(stderr, "error: unknown subcommand: %s\n",
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subcommand);
|
|
usage();
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
#define ASHIFT_UBERBLOCK_SHIFT(ashift) \
|
|
MIN(MAX(ashift, UBERBLOCK_SHIFT), \
|
|
MAX_UBERBLOCK_SHIFT)
|
|
#define ASHIFT_UBERBLOCK_SIZE(ashift) \
|
|
(1ULL << ASHIFT_UBERBLOCK_SHIFT(ashift))
|
|
|
|
#define REPAIR_LABEL_STATUS_CKSUM (1 << 0)
|
|
#define REPAIR_LABEL_STATUS_UB (1 << 1)
|
|
|
|
static int
|
|
zhack_repair_read_label(const int fd, vdev_label_t *vl,
|
|
const uint64_t label_offset, const int l)
|
|
{
|
|
const int err = pread64(fd, vl, sizeof (vdev_label_t), label_offset);
|
|
|
|
if (err == -1) {
|
|
(void) fprintf(stderr,
|
|
"error: cannot read label %d: %s\n",
|
|
l, strerror(errno));
|
|
return (err);
|
|
} else if (err != sizeof (vdev_label_t)) {
|
|
(void) fprintf(stderr,
|
|
"error: bad label %d read size\n", l);
|
|
return (err);
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
static void
|
|
zhack_repair_calc_cksum(const int byteswap, void *data, const uint64_t offset,
|
|
const uint64_t abdsize, zio_eck_t *eck, zio_cksum_t *cksum)
|
|
{
|
|
zio_cksum_t verifier;
|
|
zio_cksum_t current_cksum;
|
|
zio_checksum_info_t *ci;
|
|
abd_t *abd;
|
|
|
|
ZIO_SET_CHECKSUM(&verifier, offset, 0, 0, 0);
|
|
|
|
if (byteswap)
|
|
byteswap_uint64_array(&verifier, sizeof (zio_cksum_t));
|
|
|
|
current_cksum = eck->zec_cksum;
|
|
eck->zec_cksum = verifier;
|
|
|
|
ci = &zio_checksum_table[ZIO_CHECKSUM_LABEL];
|
|
abd = abd_get_from_buf(data, abdsize);
|
|
ci->ci_func[byteswap](abd, abdsize, NULL, cksum);
|
|
abd_free(abd);
|
|
|
|
eck->zec_cksum = current_cksum;
|
|
}
|
|
|
|
static int
|
|
zhack_repair_check_label(uberblock_t *ub, const int l, const char **cfg_keys,
|
|
const size_t cfg_keys_len, nvlist_t *cfg, nvlist_t *vdev_tree_cfg,
|
|
uint64_t *ashift)
|
|
{
|
|
int err;
|
|
|
|
if (ub->ub_txg != 0) {
|
|
(void) fprintf(stderr,
|
|
"error: label %d: UB TXG of 0 expected, but got %"
|
|
PRIu64 "\n",
|
|
l, ub->ub_txg);
|
|
(void) fprintf(stderr, "It would appear the device was not "
|
|
"properly removed.\n");
|
|
return (1);
|
|
}
|
|
|
|
for (int i = 0; i < cfg_keys_len; i++) {
|
|
uint64_t val;
|
|
err = nvlist_lookup_uint64(cfg, cfg_keys[i], &val);
|
|
if (err) {
|
|
(void) fprintf(stderr,
|
|
"error: label %d, %d: "
|
|
"cannot find nvlist key %s\n",
|
|
l, i, cfg_keys[i]);
|
|
return (err);
|
|
}
|
|
}
|
|
|
|
err = nvlist_lookup_nvlist(cfg,
|
|
ZPOOL_CONFIG_VDEV_TREE, &vdev_tree_cfg);
|
|
if (err) {
|
|
(void) fprintf(stderr,
|
|
"error: label %d: cannot find nvlist key %s\n",
|
|
l, ZPOOL_CONFIG_VDEV_TREE);
|
|
return (err);
|
|
}
|
|
|
|
err = nvlist_lookup_uint64(vdev_tree_cfg,
|
|
ZPOOL_CONFIG_ASHIFT, ashift);
|
|
if (err) {
|
|
(void) fprintf(stderr,
|
|
"error: label %d: cannot find nvlist key %s\n",
|
|
l, ZPOOL_CONFIG_ASHIFT);
|
|
return (err);
|
|
}
|
|
|
|
if (*ashift == 0) {
|
|
(void) fprintf(stderr,
|
|
"error: label %d: nvlist key %s is zero\n",
|
|
l, ZPOOL_CONFIG_ASHIFT);
|
|
return (err);
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
zhack_repair_undetach(uberblock_t *ub, nvlist_t *cfg, const int l)
|
|
{
|
|
/*
|
|
* Uberblock root block pointer has valid birth TXG.
|
|
* Copying it to the label NVlist
|
|
*/
|
|
if (ub->ub_rootbp.blk_birth != 0) {
|
|
const uint64_t txg = ub->ub_rootbp.blk_birth;
|
|
ub->ub_txg = txg;
|
|
|
|
if (nvlist_remove_all(cfg, ZPOOL_CONFIG_CREATE_TXG) != 0) {
|
|
(void) fprintf(stderr,
|
|
"error: label %d: "
|
|
"Failed to remove pool creation TXG\n",
|
|
l);
|
|
return (1);
|
|
}
|
|
|
|
if (nvlist_remove_all(cfg, ZPOOL_CONFIG_POOL_TXG) != 0) {
|
|
(void) fprintf(stderr,
|
|
"error: label %d: Failed to remove pool TXG to "
|
|
"be replaced.\n",
|
|
l);
|
|
return (1);
|
|
}
|
|
|
|
if (nvlist_add_uint64(cfg, ZPOOL_CONFIG_POOL_TXG, txg) != 0) {
|
|
(void) fprintf(stderr,
|
|
"error: label %d: "
|
|
"Failed to add pool TXG of %" PRIu64 "\n",
|
|
l, txg);
|
|
return (1);
|
|
}
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
static boolean_t
|
|
zhack_repair_write_label(const int l, const int fd, const int byteswap,
|
|
void *data, zio_eck_t *eck, const uint64_t offset, const uint64_t abdsize)
|
|
{
|
|
zio_cksum_t actual_cksum;
|
|
zhack_repair_calc_cksum(byteswap, data, offset, abdsize, eck,
|
|
&actual_cksum);
|
|
zio_cksum_t expected_cksum = eck->zec_cksum;
|
|
ssize_t err;
|
|
|
|
if (ZIO_CHECKSUM_EQUAL(actual_cksum, expected_cksum))
|
|
return (B_FALSE);
|
|
|
|
eck->zec_cksum = actual_cksum;
|
|
|
|
err = pwrite64(fd, data, abdsize, offset);
|
|
if (err == -1) {
|
|
(void) fprintf(stderr, "error: cannot write label %d: %s\n",
|
|
l, strerror(errno));
|
|
return (B_FALSE);
|
|
} else if (err != abdsize) {
|
|
(void) fprintf(stderr, "error: bad write size label %d\n", l);
|
|
return (B_FALSE);
|
|
} else {
|
|
(void) fprintf(stderr,
|
|
"label %d: wrote %" PRIu64 " bytes at offset %" PRIu64 "\n",
|
|
l, abdsize, offset);
|
|
}
|
|
|
|
return (B_TRUE);
|
|
}
|
|
|
|
static void
|
|
zhack_repair_write_uberblock(vdev_label_t *vl, const int l,
|
|
const uint64_t ashift, const int fd, const int byteswap,
|
|
const uint64_t label_offset, uint32_t *labels_repaired)
|
|
{
|
|
void *ub_data =
|
|
(char *)vl + offsetof(vdev_label_t, vl_uberblock);
|
|
zio_eck_t *ub_eck =
|
|
(zio_eck_t *)
|
|
((char *)(ub_data) + (ASHIFT_UBERBLOCK_SIZE(ashift))) - 1;
|
|
|
|
if (ub_eck->zec_magic != 0) {
|
|
(void) fprintf(stderr,
|
|
"error: label %d: "
|
|
"Expected Uberblock checksum magic number to "
|
|
"be 0, but got %" PRIu64 "\n",
|
|
l, ub_eck->zec_magic);
|
|
(void) fprintf(stderr, "It would appear there's already "
|
|
"a checksum for the uberblock.\n");
|
|
return;
|
|
}
|
|
|
|
|
|
ub_eck->zec_magic = byteswap ? BSWAP_64(ZEC_MAGIC) : ZEC_MAGIC;
|
|
|
|
if (zhack_repair_write_label(l, fd, byteswap,
|
|
ub_data, ub_eck,
|
|
label_offset + offsetof(vdev_label_t, vl_uberblock),
|
|
ASHIFT_UBERBLOCK_SIZE(ashift)))
|
|
labels_repaired[l] |= REPAIR_LABEL_STATUS_UB;
|
|
}
|
|
|
|
static void
|
|
zhack_repair_print_cksum(FILE *stream, const zio_cksum_t *cksum)
|
|
{
|
|
(void) fprintf(stream,
|
|
"%016llx:%016llx:%016llx:%016llx",
|
|
(u_longlong_t)cksum->zc_word[0],
|
|
(u_longlong_t)cksum->zc_word[1],
|
|
(u_longlong_t)cksum->zc_word[2],
|
|
(u_longlong_t)cksum->zc_word[3]);
|
|
}
|
|
|
|
static int
|
|
zhack_repair_test_cksum(const int byteswap, void *vdev_data,
|
|
zio_eck_t *vdev_eck, const uint64_t vdev_phys_offset, const int l)
|
|
{
|
|
const zio_cksum_t expected_cksum = vdev_eck->zec_cksum;
|
|
zio_cksum_t actual_cksum;
|
|
zhack_repair_calc_cksum(byteswap, vdev_data, vdev_phys_offset,
|
|
VDEV_PHYS_SIZE, vdev_eck, &actual_cksum);
|
|
const uint64_t expected_magic = byteswap ?
|
|
BSWAP_64(ZEC_MAGIC) : ZEC_MAGIC;
|
|
const uint64_t actual_magic = vdev_eck->zec_magic;
|
|
int err = 0;
|
|
if (actual_magic != expected_magic) {
|
|
(void) fprintf(stderr, "error: label %d: "
|
|
"Expected "
|
|
"the nvlist checksum magic number to not be %"
|
|
PRIu64 " not %" PRIu64 "\n",
|
|
l, expected_magic, actual_magic);
|
|
err = ECKSUM;
|
|
}
|
|
if (!ZIO_CHECKSUM_EQUAL(actual_cksum, expected_cksum)) {
|
|
(void) fprintf(stderr, "error: label %d: "
|
|
"Expected the nvlist checksum to be ", l);
|
|
(void) zhack_repair_print_cksum(stderr,
|
|
&expected_cksum);
|
|
(void) fprintf(stderr, " not ");
|
|
zhack_repair_print_cksum(stderr, &actual_cksum);
|
|
(void) fprintf(stderr, "\n");
|
|
err = ECKSUM;
|
|
}
|
|
return (err);
|
|
}
|
|
|
|
static void
|
|
zhack_repair_one_label(const zhack_repair_op_t op, const int fd,
|
|
vdev_label_t *vl, const uint64_t label_offset, const int l,
|
|
uint32_t *labels_repaired)
|
|
{
|
|
ssize_t err;
|
|
uberblock_t *ub = (uberblock_t *)vl->vl_uberblock;
|
|
void *vdev_data =
|
|
(char *)vl + offsetof(vdev_label_t, vl_vdev_phys);
|
|
zio_eck_t *vdev_eck =
|
|
(zio_eck_t *)((char *)(vdev_data) + VDEV_PHYS_SIZE) - 1;
|
|
const uint64_t vdev_phys_offset =
|
|
label_offset + offsetof(vdev_label_t, vl_vdev_phys);
|
|
const char *cfg_keys[] = { ZPOOL_CONFIG_VERSION,
|
|
ZPOOL_CONFIG_POOL_STATE, ZPOOL_CONFIG_GUID };
|
|
nvlist_t *cfg;
|
|
nvlist_t *vdev_tree_cfg = NULL;
|
|
uint64_t ashift;
|
|
int byteswap;
|
|
|
|
err = zhack_repair_read_label(fd, vl, label_offset, l);
|
|
if (err)
|
|
return;
|
|
|
|
if (vdev_eck->zec_magic == 0) {
|
|
(void) fprintf(stderr, "error: label %d: "
|
|
"Expected the nvlist checksum magic number to not be zero"
|
|
"\n",
|
|
l);
|
|
(void) fprintf(stderr, "There should already be a checksum "
|
|
"for the label.\n");
|
|
return;
|
|
}
|
|
|
|
byteswap =
|
|
(vdev_eck->zec_magic == BSWAP_64((uint64_t)ZEC_MAGIC));
|
|
|
|
if (byteswap) {
|
|
byteswap_uint64_array(&vdev_eck->zec_cksum,
|
|
sizeof (zio_cksum_t));
|
|
vdev_eck->zec_magic = BSWAP_64(vdev_eck->zec_magic);
|
|
}
|
|
|
|
if ((op & ZHACK_REPAIR_OP_CKSUM) == 0 &&
|
|
zhack_repair_test_cksum(byteswap, vdev_data, vdev_eck,
|
|
vdev_phys_offset, l) != 0) {
|
|
(void) fprintf(stderr, "It would appear checksums are "
|
|
"corrupted. Try zhack repair label -c <device>\n");
|
|
return;
|
|
}
|
|
|
|
err = nvlist_unpack(vl->vl_vdev_phys.vp_nvlist,
|
|
VDEV_PHYS_SIZE - sizeof (zio_eck_t), &cfg, 0);
|
|
if (err) {
|
|
(void) fprintf(stderr,
|
|
"error: cannot unpack nvlist label %d\n", l);
|
|
return;
|
|
}
|
|
|
|
err = zhack_repair_check_label(ub,
|
|
l, cfg_keys, ARRAY_SIZE(cfg_keys), cfg, vdev_tree_cfg, &ashift);
|
|
if (err)
|
|
return;
|
|
|
|
if ((op & ZHACK_REPAIR_OP_UNDETACH) != 0) {
|
|
char *buf;
|
|
size_t buflen;
|
|
|
|
err = zhack_repair_undetach(ub, cfg, l);
|
|
if (err)
|
|
return;
|
|
|
|
buf = vl->vl_vdev_phys.vp_nvlist;
|
|
buflen = VDEV_PHYS_SIZE - sizeof (zio_eck_t);
|
|
if (nvlist_pack(cfg, &buf, &buflen, NV_ENCODE_XDR, 0) != 0) {
|
|
(void) fprintf(stderr,
|
|
"error: label %d: Failed to pack nvlist\n", l);
|
|
return;
|
|
}
|
|
|
|
zhack_repair_write_uberblock(vl,
|
|
l, ashift, fd, byteswap, label_offset, labels_repaired);
|
|
}
|
|
|
|
if (zhack_repair_write_label(l, fd, byteswap, vdev_data, vdev_eck,
|
|
vdev_phys_offset, VDEV_PHYS_SIZE))
|
|
labels_repaired[l] |= REPAIR_LABEL_STATUS_CKSUM;
|
|
|
|
fsync(fd);
|
|
}
|
|
|
|
static const char *
|
|
zhack_repair_label_status(const uint32_t label_status,
|
|
const uint32_t to_check)
|
|
{
|
|
return ((label_status & to_check) != 0 ? "repaired" : "skipped");
|
|
}
|
|
|
|
static int
|
|
zhack_label_repair(const zhack_repair_op_t op, const int argc, char **argv)
|
|
{
|
|
uint32_t labels_repaired[VDEV_LABELS] = {0};
|
|
vdev_label_t labels[VDEV_LABELS] = {{{0}}};
|
|
struct stat64 st;
|
|
int fd;
|
|
off_t filesize;
|
|
uint32_t repaired = 0;
|
|
|
|
abd_init();
|
|
|
|
if (argc < 1) {
|
|
(void) fprintf(stderr, "error: missing device\n");
|
|
usage();
|
|
}
|
|
|
|
if ((fd = open(argv[0], O_RDWR)) == -1)
|
|
fatal(NULL, FTAG, "cannot open '%s': %s", argv[0],
|
|
strerror(errno));
|
|
|
|
if (fstat64_blk(fd, &st) != 0)
|
|
fatal(NULL, FTAG, "cannot stat '%s': %s", argv[0],
|
|
strerror(errno));
|
|
|
|
filesize = st.st_size;
|
|
(void) fprintf(stderr, "Calculated filesize to be %jd\n",
|
|
(intmax_t)filesize);
|
|
|
|
if (filesize % sizeof (vdev_label_t) != 0)
|
|
filesize =
|
|
(filesize / sizeof (vdev_label_t)) * sizeof (vdev_label_t);
|
|
|
|
for (int l = 0; l < VDEV_LABELS; l++) {
|
|
zhack_repair_one_label(op, fd, &labels[l],
|
|
vdev_label_offset(filesize, l, 0), l, labels_repaired);
|
|
}
|
|
|
|
close(fd);
|
|
|
|
abd_fini();
|
|
|
|
for (int l = 0; l < VDEV_LABELS; l++) {
|
|
const uint32_t lr = labels_repaired[l];
|
|
(void) printf("label %d: ", l);
|
|
(void) printf("uberblock: %s ",
|
|
zhack_repair_label_status(lr, REPAIR_LABEL_STATUS_UB));
|
|
(void) printf("checksum: %s\n",
|
|
zhack_repair_label_status(lr, REPAIR_LABEL_STATUS_CKSUM));
|
|
repaired |= lr;
|
|
}
|
|
|
|
if (repaired > 0)
|
|
return (0);
|
|
|
|
return (1);
|
|
}
|
|
|
|
static int
|
|
zhack_do_label_repair(int argc, char **argv)
|
|
{
|
|
zhack_repair_op_t op = ZHACK_REPAIR_OP_UNKNOWN;
|
|
int c;
|
|
|
|
optind = 1;
|
|
while ((c = getopt(argc, argv, "+cu")) != -1) {
|
|
switch (c) {
|
|
case 'c':
|
|
op |= ZHACK_REPAIR_OP_CKSUM;
|
|
break;
|
|
case 'u':
|
|
op |= ZHACK_REPAIR_OP_UNDETACH;
|
|
break;
|
|
default:
|
|
usage();
|
|
break;
|
|
}
|
|
}
|
|
|
|
argc -= optind;
|
|
argv += optind;
|
|
|
|
if (op == ZHACK_REPAIR_OP_UNKNOWN)
|
|
op = ZHACK_REPAIR_OP_CKSUM;
|
|
|
|
return (zhack_label_repair(op, argc, argv));
|
|
}
|
|
|
|
static int
|
|
zhack_do_label(int argc, char **argv)
|
|
{
|
|
char *subcommand;
|
|
int err;
|
|
|
|
argc--;
|
|
argv++;
|
|
if (argc == 0) {
|
|
(void) fprintf(stderr,
|
|
"error: no label operation specified\n");
|
|
usage();
|
|
}
|
|
|
|
subcommand = argv[0];
|
|
if (strcmp(subcommand, "repair") == 0) {
|
|
err = zhack_do_label_repair(argc, argv);
|
|
} else {
|
|
(void) fprintf(stderr, "error: unknown subcommand: %s\n",
|
|
subcommand);
|
|
usage();
|
|
}
|
|
|
|
return (err);
|
|
}
|
|
|
|
#define MAX_NUM_PATHS 1024
|
|
|
|
int
|
|
main(int argc, char **argv)
|
|
{
|
|
char *path[MAX_NUM_PATHS];
|
|
const char *subcommand;
|
|
int rv = 0;
|
|
int c;
|
|
|
|
g_importargs.path = path;
|
|
|
|
dprintf_setup(&argc, argv);
|
|
zfs_prop_init();
|
|
|
|
while ((c = getopt(argc, argv, "+c:d:")) != -1) {
|
|
switch (c) {
|
|
case 'c':
|
|
g_importargs.cachefile = optarg;
|
|
break;
|
|
case 'd':
|
|
assert(g_importargs.paths < MAX_NUM_PATHS);
|
|
g_importargs.path[g_importargs.paths++] = optarg;
|
|
break;
|
|
default:
|
|
usage();
|
|
break;
|
|
}
|
|
}
|
|
|
|
argc -= optind;
|
|
argv += optind;
|
|
optind = 1;
|
|
|
|
if (argc == 0) {
|
|
(void) fprintf(stderr, "error: no command specified\n");
|
|
usage();
|
|
}
|
|
|
|
subcommand = argv[0];
|
|
|
|
if (strcmp(subcommand, "feature") == 0) {
|
|
rv = zhack_do_feature(argc, argv);
|
|
} else if (strcmp(subcommand, "label") == 0) {
|
|
return (zhack_do_label(argc, argv));
|
|
} else {
|
|
(void) fprintf(stderr, "error: unknown subcommand: %s\n",
|
|
subcommand);
|
|
usage();
|
|
}
|
|
|
|
if (!g_readonly && spa_export(g_pool, NULL, B_TRUE, B_FALSE) != 0) {
|
|
fatal(NULL, FTAG, "pool export failed; "
|
|
"changes may not be committed to disk\n");
|
|
}
|
|
|
|
kernel_fini();
|
|
|
|
return (rv);
|
|
}
|