freebsd-dev/module/zfs/zfs_fm.c
Brian Behlendorf 904ea2763e Add automatic hot spare functionality
When a vdev starts getting I/O or checksum errors it is now
possible to automatically rebuild to a hot spare device.

To cleanly support this functionality in a shell script some
additional information was added to all zevent ereports which
include a vdev.  This covers both io and checksum zevents but
may be used but other scripts.

In the Illumos FMA solution the same information is required
but it is retrieved through the libzfs library interface.
Specifically the following members were added:

  vdev_spare_paths  - List of vdev paths for all hot spares.
  vdev_spare_guids  - List of vdev guids for all hot spares.
  vdev_read_errors  - Read errors for the problematic vdev
  vdev_write_errors - Write errors for the problematic vdev
  vdev_cksum_errors - Checksum errors for the problematic vdev.

By default the required hot spare scripts are installed but this
functionality is disabled.  To enable hot sparing uncomment the
ZED_SPARE_ON_IO_ERRORS and ZED_SPARE_ON_CHECKSUM_ERRORS in the
/etc/zfs/zed.d/zed.rc configuration file.

These scripts do no add support for the autoexpand property. At
a minimum this requires adding a new udev rule to detect when
a new device is added to the system.  It also requires that the
autoexpand policy be ported from Illumos, see:

  https://github.com/illumos/illumos-gate/blob/master/usr/src/cmd/syseventd/modules/zfs_mod/zfs_mod.c

Support for detecting the correct name of a vdev when it's not
a whole disk was added by Turbo Fredriksson.

Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Chris Dunlap <cdunlap@llnl.gov>
Signed-off-by: Turbo Fredriksson <turbo@bayour.com>
Issue #2
2014-04-02 13:10:08 -07:00

934 lines
27 KiB
C

/*
* 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 2009 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
/*
* Copyright (c) 2012 by Delphix. All rights reserved.
*/
#include <sys/spa.h>
#include <sys/spa_impl.h>
#include <sys/vdev.h>
#include <sys/vdev_impl.h>
#include <sys/zio.h>
#include <sys/zio_checksum.h>
#include <sys/fm/fs/zfs.h>
#include <sys/fm/protocol.h>
#include <sys/fm/util.h>
#include <sys/sysevent.h>
/*
* This general routine is responsible for generating all the different ZFS
* ereports. The payload is dependent on the class, and which arguments are
* supplied to the function:
*
* EREPORT POOL VDEV IO
* block X X X
* data X X
* device X X
* pool X
*
* If we are in a loading state, all errors are chained together by the same
* SPA-wide ENA (Error Numeric Association).
*
* For isolated I/O requests, we get the ENA from the zio_t. The propagation
* gets very complicated due to RAID-Z, gang blocks, and vdev caching. We want
* to chain together all ereports associated with a logical piece of data. For
* read I/Os, there are basically three 'types' of I/O, which form a roughly
* layered diagram:
*
* +---------------+
* | Aggregate I/O | No associated logical data or device
* +---------------+
* |
* V
* +---------------+ Reads associated with a piece of logical data.
* | Read I/O | This includes reads on behalf of RAID-Z,
* +---------------+ mirrors, gang blocks, retries, etc.
* |
* V
* +---------------+ Reads associated with a particular device, but
* | Physical I/O | no logical data. Issued as part of vdev caching
* +---------------+ and I/O aggregation.
*
* Note that 'physical I/O' here is not the same terminology as used in the rest
* of ZIO. Typically, 'physical I/O' simply means that there is no attached
* blockpointer. But I/O with no associated block pointer can still be related
* to a logical piece of data (i.e. RAID-Z requests).
*
* Purely physical I/O always have unique ENAs. They are not related to a
* particular piece of logical data, and therefore cannot be chained together.
* We still generate an ereport, but the DE doesn't correlate it with any
* logical piece of data. When such an I/O fails, the delegated I/O requests
* will issue a retry, which will trigger the 'real' ereport with the correct
* ENA.
*
* We keep track of the ENA for a ZIO chain through the 'io_logical' member.
* When a new logical I/O is issued, we set this to point to itself. Child I/Os
* then inherit this pointer, so that when it is first set subsequent failures
* will use the same ENA. For vdev cache fill and queue aggregation I/O,
* this pointer is set to NULL, and no ereport will be generated (since it
* doesn't actually correspond to any particular device or piece of data,
* and the caller will always retry without caching or queueing anyway).
*
* For checksum errors, we want to include more information about the actual
* error which occurs. Accordingly, we build an ereport when the error is
* noticed, but instead of sending it in immediately, we hang it off of the
* io_cksum_report field of the logical IO. When the logical IO completes
* (successfully or not), zfs_ereport_finish_checksum() is called with the
* good and bad versions of the buffer (if available), and we annotate the
* ereport with information about the differences.
*/
#ifdef _KERNEL
static void
zfs_zevent_post_cb(nvlist_t *nvl, nvlist_t *detector)
{
if (nvl)
fm_nvlist_destroy(nvl, FM_NVA_FREE);
if (detector)
fm_nvlist_destroy(detector, FM_NVA_FREE);
}
static void
zfs_ereport_start(nvlist_t **ereport_out, nvlist_t **detector_out,
const char *subclass, spa_t *spa, vdev_t *vd, zio_t *zio,
uint64_t stateoroffset, uint64_t size)
{
nvlist_t *ereport, *detector;
uint64_t ena;
char class[64];
/*
* If we are doing a spa_tryimport() or in recovery mode,
* ignore errors.
*/
if (spa_load_state(spa) == SPA_LOAD_TRYIMPORT ||
spa_load_state(spa) == SPA_LOAD_RECOVER)
return;
/*
* If we are in the middle of opening a pool, and the previous attempt
* failed, don't bother logging any new ereports - we're just going to
* get the same diagnosis anyway.
*/
if (spa_load_state(spa) != SPA_LOAD_NONE &&
spa->spa_last_open_failed)
return;
if (zio != NULL) {
/*
* If this is not a read or write zio, ignore the error. This
* can occur if the DKIOCFLUSHWRITECACHE ioctl fails.
*/
if (zio->io_type != ZIO_TYPE_READ &&
zio->io_type != ZIO_TYPE_WRITE)
return;
if (vd != NULL) {
/*
* If the vdev has already been marked as failing due
* to a failed probe, then ignore any subsequent I/O
* errors, as the DE will automatically fault the vdev
* on the first such failure. This also catches cases
* where vdev_remove_wanted is set and the device has
* not yet been asynchronously placed into the REMOVED
* state.
*/
if (zio->io_vd == vd && !vdev_accessible(vd, zio))
return;
/*
* Ignore checksum errors for reads from DTL regions of
* leaf vdevs.
*/
if (zio->io_type == ZIO_TYPE_READ &&
zio->io_error == ECKSUM &&
vd->vdev_ops->vdev_op_leaf &&
vdev_dtl_contains(vd, DTL_MISSING, zio->io_txg, 1))
return;
}
}
/*
* For probe failure, we want to avoid posting ereports if we've
* already removed the device in the meantime.
*/
if (vd != NULL &&
strcmp(subclass, FM_EREPORT_ZFS_PROBE_FAILURE) == 0 &&
(vd->vdev_remove_wanted || vd->vdev_state == VDEV_STATE_REMOVED))
return;
if ((ereport = fm_nvlist_create(NULL)) == NULL)
return;
if ((detector = fm_nvlist_create(NULL)) == NULL) {
fm_nvlist_destroy(ereport, FM_NVA_FREE);
return;
}
/*
* Serialize ereport generation
*/
mutex_enter(&spa->spa_errlist_lock);
/*
* Determine the ENA to use for this event. If we are in a loading
* state, use a SPA-wide ENA. Otherwise, if we are in an I/O state, use
* a root zio-wide ENA. Otherwise, simply use a unique ENA.
*/
if (spa_load_state(spa) != SPA_LOAD_NONE) {
if (spa->spa_ena == 0)
spa->spa_ena = fm_ena_generate(0, FM_ENA_FMT1);
ena = spa->spa_ena;
} else if (zio != NULL && zio->io_logical != NULL) {
if (zio->io_logical->io_ena == 0)
zio->io_logical->io_ena =
fm_ena_generate(0, FM_ENA_FMT1);
ena = zio->io_logical->io_ena;
} else {
ena = fm_ena_generate(0, FM_ENA_FMT1);
}
/*
* Construct the full class, detector, and other standard FMA fields.
*/
(void) snprintf(class, sizeof (class), "%s.%s",
ZFS_ERROR_CLASS, subclass);
fm_fmri_zfs_set(detector, FM_ZFS_SCHEME_VERSION, spa_guid(spa),
vd != NULL ? vd->vdev_guid : 0);
fm_ereport_set(ereport, FM_EREPORT_VERSION, class, ena, detector, NULL);
/*
* Construct the per-ereport payload, depending on which parameters are
* passed in.
*/
/*
* Generic payload members common to all ereports.
*/
fm_payload_set(ereport, FM_EREPORT_PAYLOAD_ZFS_POOL,
DATA_TYPE_STRING, spa_name(spa), FM_EREPORT_PAYLOAD_ZFS_POOL_GUID,
DATA_TYPE_UINT64, spa_guid(spa),
FM_EREPORT_PAYLOAD_ZFS_POOL_CONTEXT, DATA_TYPE_INT32,
spa_load_state(spa), NULL);
if (spa != NULL) {
fm_payload_set(ereport, FM_EREPORT_PAYLOAD_ZFS_POOL_FAILMODE,
DATA_TYPE_STRING,
spa_get_failmode(spa) == ZIO_FAILURE_MODE_WAIT ?
FM_EREPORT_FAILMODE_WAIT :
spa_get_failmode(spa) == ZIO_FAILURE_MODE_CONTINUE ?
FM_EREPORT_FAILMODE_CONTINUE : FM_EREPORT_FAILMODE_PANIC,
NULL);
}
if (vd != NULL) {
vdev_t *pvd = vd->vdev_parent;
vdev_queue_t *vq = &vd->vdev_queue;
vdev_stat_t *vs = &vd->vdev_stat;
vdev_t *spare_vd;
uint64_t *spare_guids;
char **spare_paths;
int i, spare_count;
fm_payload_set(ereport, FM_EREPORT_PAYLOAD_ZFS_VDEV_GUID,
DATA_TYPE_UINT64, vd->vdev_guid,
FM_EREPORT_PAYLOAD_ZFS_VDEV_TYPE,
DATA_TYPE_STRING, vd->vdev_ops->vdev_op_type, NULL);
if (vd->vdev_path != NULL)
fm_payload_set(ereport,
FM_EREPORT_PAYLOAD_ZFS_VDEV_PATH,
DATA_TYPE_STRING, vd->vdev_path, NULL);
if (vd->vdev_devid != NULL)
fm_payload_set(ereport,
FM_EREPORT_PAYLOAD_ZFS_VDEV_DEVID,
DATA_TYPE_STRING, vd->vdev_devid, NULL);
if (vd->vdev_fru != NULL)
fm_payload_set(ereport,
FM_EREPORT_PAYLOAD_ZFS_VDEV_FRU,
DATA_TYPE_STRING, vd->vdev_fru, NULL);
if (vd->vdev_ashift)
fm_payload_set(ereport,
FM_EREPORT_PAYLOAD_ZFS_VDEV_ASHIFT,
DATA_TYPE_UINT64, vd->vdev_ashift, NULL);
if (vq != NULL) {
fm_payload_set(ereport,
FM_EREPORT_PAYLOAD_ZFS_VDEV_COMP_TS,
DATA_TYPE_UINT64, vq->vq_io_complete_ts, NULL);
fm_payload_set(ereport,
FM_EREPORT_PAYLOAD_ZFS_VDEV_DELTA_TS,
DATA_TYPE_UINT64, vq->vq_io_delta_ts, NULL);
}
if (vs != NULL) {
fm_payload_set(ereport,
FM_EREPORT_PAYLOAD_ZFS_VDEV_READ_ERRORS,
DATA_TYPE_UINT64, vs->vs_read_errors,
FM_EREPORT_PAYLOAD_ZFS_VDEV_WRITE_ERRORS,
DATA_TYPE_UINT64, vs->vs_write_errors,
FM_EREPORT_PAYLOAD_ZFS_VDEV_CKSUM_ERRORS,
DATA_TYPE_UINT64, vs->vs_checksum_errors, NULL);
}
if (pvd != NULL) {
fm_payload_set(ereport,
FM_EREPORT_PAYLOAD_ZFS_PARENT_GUID,
DATA_TYPE_UINT64, pvd->vdev_guid,
FM_EREPORT_PAYLOAD_ZFS_PARENT_TYPE,
DATA_TYPE_STRING, pvd->vdev_ops->vdev_op_type,
NULL);
if (pvd->vdev_path)
fm_payload_set(ereport,
FM_EREPORT_PAYLOAD_ZFS_PARENT_PATH,
DATA_TYPE_STRING, pvd->vdev_path, NULL);
if (pvd->vdev_devid)
fm_payload_set(ereport,
FM_EREPORT_PAYLOAD_ZFS_PARENT_DEVID,
DATA_TYPE_STRING, pvd->vdev_devid, NULL);
}
spare_count = spa->spa_spares.sav_count;
spare_paths = kmem_zalloc(sizeof (char *) * spare_count,
KM_PUSHPAGE);
spare_guids = kmem_zalloc(sizeof (uint64_t) * spare_count,
KM_PUSHPAGE);
for (i = 0; i < spare_count; i++) {
spare_vd = spa->spa_spares.sav_vdevs[i];
if (spare_vd) {
spare_paths[i] = spare_vd->vdev_path;
spare_guids[i] = spare_vd->vdev_guid;
}
}
fm_payload_set(ereport, FM_EREPORT_PAYLOAD_ZFS_VDEV_SPARE_PATHS,
DATA_TYPE_STRING_ARRAY, spare_count, spare_paths,
FM_EREPORT_PAYLOAD_ZFS_VDEV_SPARE_GUIDS,
DATA_TYPE_UINT64_ARRAY, spare_count, spare_guids, NULL);
kmem_free(spare_guids, sizeof (uint64_t) * spare_count);
kmem_free(spare_paths, sizeof (char *) * spare_count);
}
if (zio != NULL) {
/*
* Payload common to all I/Os.
*/
fm_payload_set(ereport, FM_EREPORT_PAYLOAD_ZFS_ZIO_ERR,
DATA_TYPE_INT32, zio->io_error, NULL);
fm_payload_set(ereport, FM_EREPORT_PAYLOAD_ZFS_ZIO_FLAGS,
DATA_TYPE_INT32, zio->io_flags, NULL);
fm_payload_set(ereport, FM_EREPORT_PAYLOAD_ZFS_ZIO_STAGE,
DATA_TYPE_UINT32, zio->io_stage, NULL);
fm_payload_set(ereport, FM_EREPORT_PAYLOAD_ZFS_ZIO_PIPELINE,
DATA_TYPE_UINT32, zio->io_pipeline, NULL);
fm_payload_set(ereport, FM_EREPORT_PAYLOAD_ZFS_ZIO_DELAY,
DATA_TYPE_UINT64, zio->io_delay, NULL);
fm_payload_set(ereport, FM_EREPORT_PAYLOAD_ZFS_ZIO_TIMESTAMP,
DATA_TYPE_UINT64, zio->io_timestamp, NULL);
fm_payload_set(ereport, FM_EREPORT_PAYLOAD_ZFS_ZIO_DELTA,
DATA_TYPE_UINT64, zio->io_delta, NULL);
/*
* If the 'size' parameter is non-zero, it indicates this is a
* RAID-Z or other I/O where the physical offset and length are
* provided for us, instead of within the zio_t.
*/
if (vd != NULL) {
if (size)
fm_payload_set(ereport,
FM_EREPORT_PAYLOAD_ZFS_ZIO_OFFSET,
DATA_TYPE_UINT64, stateoroffset,
FM_EREPORT_PAYLOAD_ZFS_ZIO_SIZE,
DATA_TYPE_UINT64, size, NULL);
else
fm_payload_set(ereport,
FM_EREPORT_PAYLOAD_ZFS_ZIO_OFFSET,
DATA_TYPE_UINT64, zio->io_offset,
FM_EREPORT_PAYLOAD_ZFS_ZIO_SIZE,
DATA_TYPE_UINT64, zio->io_size, NULL);
}
/*
* Payload for I/Os with corresponding logical information.
*/
if (zio->io_logical != NULL)
fm_payload_set(ereport,
FM_EREPORT_PAYLOAD_ZFS_ZIO_OBJSET,
DATA_TYPE_UINT64,
zio->io_logical->io_bookmark.zb_objset,
FM_EREPORT_PAYLOAD_ZFS_ZIO_OBJECT,
DATA_TYPE_UINT64,
zio->io_logical->io_bookmark.zb_object,
FM_EREPORT_PAYLOAD_ZFS_ZIO_LEVEL,
DATA_TYPE_INT64,
zio->io_logical->io_bookmark.zb_level,
FM_EREPORT_PAYLOAD_ZFS_ZIO_BLKID,
DATA_TYPE_UINT64,
zio->io_logical->io_bookmark.zb_blkid, NULL);
} else if (vd != NULL) {
/*
* If we have a vdev but no zio, this is a device fault, and the
* 'stateoroffset' parameter indicates the previous state of the
* vdev.
*/
fm_payload_set(ereport,
FM_EREPORT_PAYLOAD_ZFS_PREV_STATE,
DATA_TYPE_UINT64, stateoroffset, NULL);
}
mutex_exit(&spa->spa_errlist_lock);
*ereport_out = ereport;
*detector_out = detector;
}
/* if it's <= 128 bytes, save the corruption directly */
#define ZFM_MAX_INLINE (128 / sizeof (uint64_t))
#define MAX_RANGES 16
typedef struct zfs_ecksum_info {
/* histograms of set and cleared bits by bit number in a 64-bit word */
uint16_t zei_histogram_set[sizeof (uint64_t) * NBBY];
uint16_t zei_histogram_cleared[sizeof (uint64_t) * NBBY];
/* inline arrays of bits set and cleared. */
uint64_t zei_bits_set[ZFM_MAX_INLINE];
uint64_t zei_bits_cleared[ZFM_MAX_INLINE];
/*
* for each range, the number of bits set and cleared. The Hamming
* distance between the good and bad buffers is the sum of them all.
*/
uint32_t zei_range_sets[MAX_RANGES];
uint32_t zei_range_clears[MAX_RANGES];
struct zei_ranges {
uint32_t zr_start;
uint32_t zr_end;
} zei_ranges[MAX_RANGES];
size_t zei_range_count;
uint32_t zei_mingap;
uint32_t zei_allowed_mingap;
} zfs_ecksum_info_t;
static void
update_histogram(uint64_t value_arg, uint16_t *hist, uint32_t *count)
{
size_t i;
size_t bits = 0;
uint64_t value = BE_64(value_arg);
/* We store the bits in big-endian (largest-first) order */
for (i = 0; i < 64; i++) {
if (value & (1ull << i)) {
hist[63 - i]++;
++bits;
}
}
/* update the count of bits changed */
*count += bits;
}
/*
* We've now filled up the range array, and need to increase "mingap" and
* shrink the range list accordingly. zei_mingap is always the smallest
* distance between array entries, so we set the new_allowed_gap to be
* one greater than that. We then go through the list, joining together
* any ranges which are closer than the new_allowed_gap.
*
* By construction, there will be at least one. We also update zei_mingap
* to the new smallest gap, to prepare for our next invocation.
*/
static void
zei_shrink_ranges(zfs_ecksum_info_t *eip)
{
uint32_t mingap = UINT32_MAX;
uint32_t new_allowed_gap = eip->zei_mingap + 1;
size_t idx, output;
size_t max = eip->zei_range_count;
struct zei_ranges *r = eip->zei_ranges;
ASSERT3U(eip->zei_range_count, >, 0);
ASSERT3U(eip->zei_range_count, <=, MAX_RANGES);
output = idx = 0;
while (idx < max - 1) {
uint32_t start = r[idx].zr_start;
uint32_t end = r[idx].zr_end;
while (idx < max - 1) {
uint32_t nstart, nend, gap;
idx++;
nstart = r[idx].zr_start;
nend = r[idx].zr_end;
gap = nstart - end;
if (gap < new_allowed_gap) {
end = nend;
continue;
}
if (gap < mingap)
mingap = gap;
break;
}
r[output].zr_start = start;
r[output].zr_end = end;
output++;
}
ASSERT3U(output, <, eip->zei_range_count);
eip->zei_range_count = output;
eip->zei_mingap = mingap;
eip->zei_allowed_mingap = new_allowed_gap;
}
static void
zei_add_range(zfs_ecksum_info_t *eip, int start, int end)
{
struct zei_ranges *r = eip->zei_ranges;
size_t count = eip->zei_range_count;
if (count >= MAX_RANGES) {
zei_shrink_ranges(eip);
count = eip->zei_range_count;
}
if (count == 0) {
eip->zei_mingap = UINT32_MAX;
eip->zei_allowed_mingap = 1;
} else {
int gap = start - r[count - 1].zr_end;
if (gap < eip->zei_allowed_mingap) {
r[count - 1].zr_end = end;
return;
}
if (gap < eip->zei_mingap)
eip->zei_mingap = gap;
}
r[count].zr_start = start;
r[count].zr_end = end;
eip->zei_range_count++;
}
static size_t
zei_range_total_size(zfs_ecksum_info_t *eip)
{
struct zei_ranges *r = eip->zei_ranges;
size_t count = eip->zei_range_count;
size_t result = 0;
size_t idx;
for (idx = 0; idx < count; idx++)
result += (r[idx].zr_end - r[idx].zr_start);
return (result);
}
static zfs_ecksum_info_t *
annotate_ecksum(nvlist_t *ereport, zio_bad_cksum_t *info,
const uint8_t *goodbuf, const uint8_t *badbuf, size_t size,
boolean_t drop_if_identical)
{
const uint64_t *good = (const uint64_t *)goodbuf;
const uint64_t *bad = (const uint64_t *)badbuf;
uint64_t allset = 0;
uint64_t allcleared = 0;
size_t nui64s = size / sizeof (uint64_t);
size_t inline_size;
int no_inline = 0;
size_t idx;
size_t range;
size_t offset = 0;
ssize_t start = -1;
zfs_ecksum_info_t *eip = kmem_zalloc(sizeof (*eip), KM_PUSHPAGE);
/* don't do any annotation for injected checksum errors */
if (info != NULL && info->zbc_injected)
return (eip);
if (info != NULL && info->zbc_has_cksum) {
fm_payload_set(ereport,
FM_EREPORT_PAYLOAD_ZFS_CKSUM_EXPECTED,
DATA_TYPE_UINT64_ARRAY,
sizeof (info->zbc_expected) / sizeof (uint64_t),
(uint64_t *)&info->zbc_expected,
FM_EREPORT_PAYLOAD_ZFS_CKSUM_ACTUAL,
DATA_TYPE_UINT64_ARRAY,
sizeof (info->zbc_actual) / sizeof (uint64_t),
(uint64_t *)&info->zbc_actual,
FM_EREPORT_PAYLOAD_ZFS_CKSUM_ALGO,
DATA_TYPE_STRING,
info->zbc_checksum_name,
NULL);
if (info->zbc_byteswapped) {
fm_payload_set(ereport,
FM_EREPORT_PAYLOAD_ZFS_CKSUM_BYTESWAP,
DATA_TYPE_BOOLEAN, 1,
NULL);
}
}
if (badbuf == NULL || goodbuf == NULL)
return (eip);
ASSERT3U(nui64s, <=, UINT16_MAX);
ASSERT3U(size, ==, nui64s * sizeof (uint64_t));
ASSERT3U(size, <=, SPA_MAXBLOCKSIZE);
ASSERT3U(size, <=, UINT32_MAX);
/* build up the range list by comparing the two buffers. */
for (idx = 0; idx < nui64s; idx++) {
if (good[idx] == bad[idx]) {
if (start == -1)
continue;
zei_add_range(eip, start, idx);
start = -1;
} else {
if (start != -1)
continue;
start = idx;
}
}
if (start != -1)
zei_add_range(eip, start, idx);
/* See if it will fit in our inline buffers */
inline_size = zei_range_total_size(eip);
if (inline_size > ZFM_MAX_INLINE)
no_inline = 1;
/*
* If there is no change and we want to drop if the buffers are
* identical, do so.
*/
if (inline_size == 0 && drop_if_identical) {
kmem_free(eip, sizeof (*eip));
return (NULL);
}
/*
* Now walk through the ranges, filling in the details of the
* differences. Also convert our uint64_t-array offsets to byte
* offsets.
*/
for (range = 0; range < eip->zei_range_count; range++) {
size_t start = eip->zei_ranges[range].zr_start;
size_t end = eip->zei_ranges[range].zr_end;
for (idx = start; idx < end; idx++) {
uint64_t set, cleared;
// bits set in bad, but not in good
set = ((~good[idx]) & bad[idx]);
// bits set in good, but not in bad
cleared = (good[idx] & (~bad[idx]));
allset |= set;
allcleared |= cleared;
if (!no_inline) {
ASSERT3U(offset, <, inline_size);
eip->zei_bits_set[offset] = set;
eip->zei_bits_cleared[offset] = cleared;
offset++;
}
update_histogram(set, eip->zei_histogram_set,
&eip->zei_range_sets[range]);
update_histogram(cleared, eip->zei_histogram_cleared,
&eip->zei_range_clears[range]);
}
/* convert to byte offsets */
eip->zei_ranges[range].zr_start *= sizeof (uint64_t);
eip->zei_ranges[range].zr_end *= sizeof (uint64_t);
}
eip->zei_allowed_mingap *= sizeof (uint64_t);
inline_size *= sizeof (uint64_t);
/* fill in ereport */
fm_payload_set(ereport,
FM_EREPORT_PAYLOAD_ZFS_BAD_OFFSET_RANGES,
DATA_TYPE_UINT32_ARRAY, 2 * eip->zei_range_count,
(uint32_t *)eip->zei_ranges,
FM_EREPORT_PAYLOAD_ZFS_BAD_RANGE_MIN_GAP,
DATA_TYPE_UINT32, eip->zei_allowed_mingap,
FM_EREPORT_PAYLOAD_ZFS_BAD_RANGE_SETS,
DATA_TYPE_UINT32_ARRAY, eip->zei_range_count, eip->zei_range_sets,
FM_EREPORT_PAYLOAD_ZFS_BAD_RANGE_CLEARS,
DATA_TYPE_UINT32_ARRAY, eip->zei_range_count, eip->zei_range_clears,
NULL);
if (!no_inline) {
fm_payload_set(ereport,
FM_EREPORT_PAYLOAD_ZFS_BAD_SET_BITS,
DATA_TYPE_UINT8_ARRAY,
inline_size, (uint8_t *)eip->zei_bits_set,
FM_EREPORT_PAYLOAD_ZFS_BAD_CLEARED_BITS,
DATA_TYPE_UINT8_ARRAY,
inline_size, (uint8_t *)eip->zei_bits_cleared,
NULL);
} else {
fm_payload_set(ereport,
FM_EREPORT_PAYLOAD_ZFS_BAD_SET_HISTOGRAM,
DATA_TYPE_UINT16_ARRAY,
NBBY * sizeof (uint64_t), eip->zei_histogram_set,
FM_EREPORT_PAYLOAD_ZFS_BAD_CLEARED_HISTOGRAM,
DATA_TYPE_UINT16_ARRAY,
NBBY * sizeof (uint64_t), eip->zei_histogram_cleared,
NULL);
}
return (eip);
}
#endif
void
zfs_ereport_post(const char *subclass, spa_t *spa, vdev_t *vd, zio_t *zio,
uint64_t stateoroffset, uint64_t size)
{
#ifdef _KERNEL
nvlist_t *ereport = NULL;
nvlist_t *detector = NULL;
zfs_ereport_start(&ereport, &detector,
subclass, spa, vd, zio, stateoroffset, size);
if (ereport == NULL)
return;
/* Cleanup is handled by the callback function */
zfs_zevent_post(ereport, detector, zfs_zevent_post_cb);
#endif
}
void
zfs_ereport_start_checksum(spa_t *spa, vdev_t *vd,
struct zio *zio, uint64_t offset, uint64_t length, void *arg,
zio_bad_cksum_t *info)
{
zio_cksum_report_t *report = kmem_zalloc(sizeof (*report), KM_PUSHPAGE);
if (zio->io_vsd != NULL)
zio->io_vsd_ops->vsd_cksum_report(zio, report, arg);
else
zio_vsd_default_cksum_report(zio, report, arg);
/* copy the checksum failure information if it was provided */
if (info != NULL) {
report->zcr_ckinfo = kmem_zalloc(sizeof (*info), KM_PUSHPAGE);
bcopy(info, report->zcr_ckinfo, sizeof (*info));
}
report->zcr_align = 1ULL << vd->vdev_top->vdev_ashift;
report->zcr_length = length;
#ifdef _KERNEL
zfs_ereport_start(&report->zcr_ereport, &report->zcr_detector,
FM_EREPORT_ZFS_CHECKSUM, spa, vd, zio, offset, length);
if (report->zcr_ereport == NULL) {
report->zcr_free(report->zcr_cbdata, report->zcr_cbinfo);
if (report->zcr_ckinfo != NULL) {
kmem_free(report->zcr_ckinfo,
sizeof (*report->zcr_ckinfo));
}
kmem_free(report, sizeof (*report));
return;
}
#endif
mutex_enter(&spa->spa_errlist_lock);
report->zcr_next = zio->io_logical->io_cksum_report;
zio->io_logical->io_cksum_report = report;
mutex_exit(&spa->spa_errlist_lock);
}
void
zfs_ereport_finish_checksum(zio_cksum_report_t *report,
const void *good_data, const void *bad_data, boolean_t drop_if_identical)
{
#ifdef _KERNEL
zfs_ecksum_info_t *info = NULL;
info = annotate_ecksum(report->zcr_ereport, report->zcr_ckinfo,
good_data, bad_data, report->zcr_length, drop_if_identical);
if (info != NULL)
zfs_zevent_post(report->zcr_ereport,
report->zcr_detector, zfs_zevent_post_cb);
report->zcr_ereport = report->zcr_detector = NULL;
if (info != NULL)
kmem_free(info, sizeof (*info));
#endif
}
void
zfs_ereport_free_checksum(zio_cksum_report_t *rpt)
{
#ifdef _KERNEL
if (rpt->zcr_ereport != NULL) {
fm_nvlist_destroy(rpt->zcr_ereport,
FM_NVA_FREE);
fm_nvlist_destroy(rpt->zcr_detector,
FM_NVA_FREE);
}
#endif
rpt->zcr_free(rpt->zcr_cbdata, rpt->zcr_cbinfo);
if (rpt->zcr_ckinfo != NULL)
kmem_free(rpt->zcr_ckinfo, sizeof (*rpt->zcr_ckinfo));
kmem_free(rpt, sizeof (*rpt));
}
void
zfs_ereport_send_interim_checksum(zio_cksum_report_t *report)
{
#ifdef _KERNEL
zfs_zevent_post(report->zcr_ereport, report->zcr_detector, NULL);
#endif
}
void
zfs_ereport_post_checksum(spa_t *spa, vdev_t *vd,
struct zio *zio, uint64_t offset, uint64_t length,
const void *good_data, const void *bad_data, zio_bad_cksum_t *zbc)
{
#ifdef _KERNEL
nvlist_t *ereport = NULL;
nvlist_t *detector = NULL;
zfs_ecksum_info_t *info;
zfs_ereport_start(&ereport, &detector,
FM_EREPORT_ZFS_CHECKSUM, spa, vd, zio, offset, length);
if (ereport == NULL)
return;
info = annotate_ecksum(ereport, zbc, good_data, bad_data, length,
B_FALSE);
if (info != NULL) {
zfs_zevent_post(ereport, detector, zfs_zevent_post_cb);
kmem_free(info, sizeof (*info));
}
#endif
}
static void
zfs_post_common(spa_t *spa, vdev_t *vd, const char *name)
{
#ifdef _KERNEL
nvlist_t *resource;
char class[64];
if (spa_load_state(spa) == SPA_LOAD_TRYIMPORT)
return;
if ((resource = fm_nvlist_create(NULL)) == NULL)
return;
(void) snprintf(class, sizeof (class), "%s.%s.%s", FM_RSRC_RESOURCE,
ZFS_ERROR_CLASS, name);
VERIFY0(nvlist_add_uint8(resource, FM_VERSION, FM_RSRC_VERSION));
VERIFY0(nvlist_add_string(resource, FM_CLASS, class));
VERIFY0(nvlist_add_uint64(resource,
FM_EREPORT_PAYLOAD_ZFS_POOL_GUID, spa_guid(spa)));
VERIFY0(nvlist_add_int32(resource,
FM_EREPORT_PAYLOAD_ZFS_POOL_CONTEXT, spa_load_state(spa)));
if (vd) {
VERIFY0(nvlist_add_uint64(resource,
FM_EREPORT_PAYLOAD_ZFS_VDEV_GUID, vd->vdev_guid));
VERIFY0(nvlist_add_uint64(resource,
FM_EREPORT_PAYLOAD_ZFS_VDEV_STATE, vd->vdev_state));
}
zfs_zevent_post(resource, NULL, zfs_zevent_post_cb);
#endif
}
/*
* The 'resource.fs.zfs.removed' event is an internal signal that the given vdev
* has been removed from the system. This will cause the DE to ignore any
* recent I/O errors, inferring that they are due to the asynchronous device
* removal.
*/
void
zfs_post_remove(spa_t *spa, vdev_t *vd)
{
zfs_post_common(spa, vd, FM_EREPORT_RESOURCE_REMOVED);
}
/*
* The 'resource.fs.zfs.autoreplace' event is an internal signal that the pool
* has the 'autoreplace' property set, and therefore any broken vdevs will be
* handled by higher level logic, and no vdev fault should be generated.
*/
void
zfs_post_autoreplace(spa_t *spa, vdev_t *vd)
{
zfs_post_common(spa, vd, FM_EREPORT_RESOURCE_AUTOREPLACE);
}
/*
* The 'resource.fs.zfs.statechange' event is an internal signal that the
* given vdev has transitioned its state to DEGRADED or HEALTHY. This will
* cause the retire agent to repair any outstanding fault management cases
* open because the device was not found (fault.fs.zfs.device).
*/
void
zfs_post_state_change(spa_t *spa, vdev_t *vd)
{
zfs_post_common(spa, vd, FM_EREPORT_RESOURCE_STATECHANGE);
}
#if defined(_KERNEL) && defined(HAVE_SPL)
EXPORT_SYMBOL(zfs_ereport_post);
EXPORT_SYMBOL(zfs_ereport_post_checksum);
EXPORT_SYMBOL(zfs_post_remove);
EXPORT_SYMBOL(zfs_post_autoreplace);
EXPORT_SYMBOL(zfs_post_state_change);
#endif /* _KERNEL */