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Diffstat (limited to 'cmd/zed/agents/zfs_mod.c')
| -rw-r--r-- | cmd/zed/agents/zfs_mod.c | 956 |
1 files changed, 956 insertions, 0 deletions
diff --git a/cmd/zed/agents/zfs_mod.c b/cmd/zed/agents/zfs_mod.c new file mode 100644 index 000000000000..8d0a3b420086 --- /dev/null +++ b/cmd/zed/agents/zfs_mod.c @@ -0,0 +1,956 @@ +/* + * 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) 2007, 2010, Oracle and/or its affiliates. All rights reserved. + * Copyright (c) 2012 by Delphix. All rights reserved. + * Copyright 2014 Nexenta Systems, Inc. All rights reserved. + * Copyright (c) 2016, 2017, Intel Corporation. + * Copyright (c) 2017 Open-E, Inc. All Rights Reserved. + */ + +/* + * ZFS syseventd module. + * + * file origin: openzfs/usr/src/cmd/syseventd/modules/zfs_mod/zfs_mod.c + * + * The purpose of this module is to identify when devices are added to the + * system, and appropriately online or replace the affected vdevs. + * + * When a device is added to the system: + * + * 1. Search for any vdevs whose devid matches that of the newly added + * device. + * + * 2. If no vdevs are found, then search for any vdevs whose udev path + * matches that of the new device. + * + * 3. If no vdevs match by either method, then ignore the event. + * + * 4. Attempt to online the device with a flag to indicate that it should + * be unspared when resilvering completes. If this succeeds, then the + * same device was inserted and we should continue normally. + * + * 5. If the pool does not have the 'autoreplace' property set, attempt to + * online the device again without the unspare flag, which will + * generate a FMA fault. + * + * 6. If the pool has the 'autoreplace' property set, and the matching vdev + * is a whole disk, then label the new disk and attempt a 'zpool + * replace'. + * + * The module responds to EC_DEV_ADD events. The special ESC_ZFS_VDEV_CHECK + * event indicates that a device failed to open during pool load, but the + * autoreplace property was set. In this case, we deferred the associated + * FMA fault until our module had a chance to process the autoreplace logic. + * If the device could not be replaced, then the second online attempt will + * trigger the FMA fault that we skipped earlier. + * + * ZFS on Linux porting notes: + * Linux udev provides a disk insert for both the disk and the partition + * + */ + +#include <ctype.h> +#include <fcntl.h> +#include <libnvpair.h> +#include <libzfs.h> +#include <libzutil.h> +#include <limits.h> +#include <stddef.h> +#include <stdlib.h> +#include <string.h> +#include <syslog.h> +#include <sys/list.h> +#include <sys/sunddi.h> +#include <sys/sysevent/eventdefs.h> +#include <sys/sysevent/dev.h> +#include <thread_pool.h> +#include <pthread.h> +#include <unistd.h> +#include <errno.h> +#include "zfs_agents.h" +#include "../zed_log.h" + +#define DEV_BYID_PATH "/dev/disk/by-id/" +#define DEV_BYPATH_PATH "/dev/disk/by-path/" +#define DEV_BYVDEV_PATH "/dev/disk/by-vdev/" + +typedef void (*zfs_process_func_t)(zpool_handle_t *, nvlist_t *, boolean_t); + +libzfs_handle_t *g_zfshdl; +list_t g_pool_list; /* list of unavailable pools at initialization */ +list_t g_device_list; /* list of disks with asynchronous label request */ +tpool_t *g_tpool; +boolean_t g_enumeration_done; +pthread_t g_zfs_tid; /* zfs_enum_pools() thread */ + +typedef struct unavailpool { + zpool_handle_t *uap_zhp; + list_node_t uap_node; +} unavailpool_t; + +typedef struct pendingdev { + char pd_physpath[128]; + list_node_t pd_node; +} pendingdev_t; + +static int +zfs_toplevel_state(zpool_handle_t *zhp) +{ + nvlist_t *nvroot; + vdev_stat_t *vs; + unsigned int c; + + verify(nvlist_lookup_nvlist(zpool_get_config(zhp, NULL), + ZPOOL_CONFIG_VDEV_TREE, &nvroot) == 0); + verify(nvlist_lookup_uint64_array(nvroot, ZPOOL_CONFIG_VDEV_STATS, + (uint64_t **)&vs, &c) == 0); + return (vs->vs_state); +} + +static int +zfs_unavail_pool(zpool_handle_t *zhp, void *data) +{ + zed_log_msg(LOG_INFO, "zfs_unavail_pool: examining '%s' (state %d)", + zpool_get_name(zhp), (int)zfs_toplevel_state(zhp)); + + if (zfs_toplevel_state(zhp) < VDEV_STATE_DEGRADED) { + unavailpool_t *uap; + uap = malloc(sizeof (unavailpool_t)); + uap->uap_zhp = zhp; + list_insert_tail((list_t *)data, uap); + } else { + zpool_close(zhp); + } + return (0); +} + +/* + * Two stage replace on Linux + * since we get disk notifications + * we can wait for partitioned disk slice to show up! + * + * First stage tags the disk, initiates async partitioning, and returns + * Second stage finds the tag and proceeds to ZFS labeling/replace + * + * disk-add --> label-disk + tag-disk --> partition-add --> zpool_vdev_attach + * + * 1. physical match with no fs, no partition + * tag it top, partition disk + * + * 2. physical match again, see partition and tag + * + */ + +/* + * The device associated with the given vdev (either by devid or physical path) + * has been added to the system. If 'isdisk' is set, then we only attempt a + * replacement if it's a whole disk. This also implies that we should label the + * disk first. + * + * First, we attempt to online the device (making sure to undo any spare + * operation when finished). If this succeeds, then we're done. If it fails, + * and the new state is VDEV_CANT_OPEN, it indicates that the device was opened, + * but that the label was not what we expected. If the 'autoreplace' property + * is enabled, then we relabel the disk (if specified), and attempt a 'zpool + * replace'. If the online is successful, but the new state is something else + * (REMOVED or FAULTED), it indicates that we're out of sync or in some sort of + * race, and we should avoid attempting to relabel the disk. + * + * Also can arrive here from a ESC_ZFS_VDEV_CHECK event + */ +static void +zfs_process_add(zpool_handle_t *zhp, nvlist_t *vdev, boolean_t labeled) +{ + char *path; + vdev_state_t newstate; + nvlist_t *nvroot, *newvd; + pendingdev_t *device; + uint64_t wholedisk = 0ULL; + uint64_t offline = 0ULL; + uint64_t guid = 0ULL; + char *physpath = NULL, *new_devid = NULL, *enc_sysfs_path = NULL; + char rawpath[PATH_MAX], fullpath[PATH_MAX]; + char devpath[PATH_MAX]; + int ret; + boolean_t is_dm = B_FALSE; + boolean_t is_sd = B_FALSE; + uint_t c; + vdev_stat_t *vs; + + if (nvlist_lookup_string(vdev, ZPOOL_CONFIG_PATH, &path) != 0) + return; + + /* Skip healthy disks */ + verify(nvlist_lookup_uint64_array(vdev, ZPOOL_CONFIG_VDEV_STATS, + (uint64_t **)&vs, &c) == 0); + if (vs->vs_state == VDEV_STATE_HEALTHY) { + zed_log_msg(LOG_INFO, "%s: %s is already healthy, skip it.", + __func__, path); + return; + } + + (void) nvlist_lookup_string(vdev, ZPOOL_CONFIG_PHYS_PATH, &physpath); + (void) nvlist_lookup_string(vdev, ZPOOL_CONFIG_VDEV_ENC_SYSFS_PATH, + &enc_sysfs_path); + (void) nvlist_lookup_uint64(vdev, ZPOOL_CONFIG_WHOLE_DISK, &wholedisk); + (void) nvlist_lookup_uint64(vdev, ZPOOL_CONFIG_OFFLINE, &offline); + (void) nvlist_lookup_uint64(vdev, ZPOOL_CONFIG_GUID, &guid); + + if (offline) + return; /* don't intervene if it was taken offline */ + + is_dm = zfs_dev_is_dm(path); + zed_log_msg(LOG_INFO, "zfs_process_add: pool '%s' vdev '%s', phys '%s'" + " wholedisk %d, %s dm (guid %llu)", zpool_get_name(zhp), path, + physpath ? physpath : "NULL", wholedisk, is_dm ? "is" : "not", + (long long unsigned int)guid); + + /* + * The VDEV guid is preferred for identification (gets passed in path) + */ + if (guid != 0) { + (void) snprintf(fullpath, sizeof (fullpath), "%llu", + (long long unsigned int)guid); + } else { + /* + * otherwise use path sans partition suffix for whole disks + */ + (void) strlcpy(fullpath, path, sizeof (fullpath)); + if (wholedisk) { + char *spath = zfs_strip_partition(fullpath); + if (!spath) { + zed_log_msg(LOG_INFO, "%s: Can't alloc", + __func__); + return; + } + + (void) strlcpy(fullpath, spath, sizeof (fullpath)); + free(spath); + } + } + + /* + * Attempt to online the device. + */ + if (zpool_vdev_online(zhp, fullpath, + ZFS_ONLINE_CHECKREMOVE | ZFS_ONLINE_UNSPARE, &newstate) == 0 && + (newstate == VDEV_STATE_HEALTHY || + newstate == VDEV_STATE_DEGRADED)) { + zed_log_msg(LOG_INFO, " zpool_vdev_online: vdev %s is %s", + fullpath, (newstate == VDEV_STATE_HEALTHY) ? + "HEALTHY" : "DEGRADED"); + return; + } + + /* + * vdev_id alias rule for using scsi_debug devices (FMA automated + * testing) + */ + if (physpath != NULL && strcmp("scsidebug", physpath) == 0) + is_sd = B_TRUE; + + /* + * If the pool doesn't have the autoreplace property set, then use + * vdev online to trigger a FMA fault by posting an ereport. + */ + if (!zpool_get_prop_int(zhp, ZPOOL_PROP_AUTOREPLACE, NULL) || + !(wholedisk || is_dm) || (physpath == NULL)) { + (void) zpool_vdev_online(zhp, fullpath, ZFS_ONLINE_FORCEFAULT, + &newstate); + zed_log_msg(LOG_INFO, "Pool's autoreplace is not enabled or " + "not a whole disk for '%s'", fullpath); + return; + } + + /* + * Convert physical path into its current device node. Rawpath + * needs to be /dev/disk/by-vdev for a scsi_debug device since + * /dev/disk/by-path will not be present. + */ + (void) snprintf(rawpath, sizeof (rawpath), "%s%s", + is_sd ? DEV_BYVDEV_PATH : DEV_BYPATH_PATH, physpath); + + if (realpath(rawpath, devpath) == NULL && !is_dm) { + zed_log_msg(LOG_INFO, " realpath: %s failed (%s)", + rawpath, strerror(errno)); + + (void) zpool_vdev_online(zhp, fullpath, ZFS_ONLINE_FORCEFAULT, + &newstate); + + zed_log_msg(LOG_INFO, " zpool_vdev_online: %s FORCEFAULT (%s)", + fullpath, libzfs_error_description(g_zfshdl)); + return; + } + + /* Only autoreplace bad disks */ + if ((vs->vs_state != VDEV_STATE_DEGRADED) && + (vs->vs_state != VDEV_STATE_FAULTED) && + (vs->vs_state != VDEV_STATE_CANT_OPEN)) { + return; + } + + nvlist_lookup_string(vdev, "new_devid", &new_devid); + + if (is_dm) { + /* Don't label device mapper or multipath disks. */ + } else if (!labeled) { + /* + * we're auto-replacing a raw disk, so label it first + */ + char *leafname; + + /* + * If this is a request to label a whole disk, then attempt to + * write out the label. Before we can label the disk, we need + * to map the physical string that was matched on to the under + * lying device node. + * + * If any part of this process fails, then do a force online + * to trigger a ZFS fault for the device (and any hot spare + * replacement). + */ + leafname = strrchr(devpath, '/') + 1; + + /* + * If this is a request to label a whole disk, then attempt to + * write out the label. + */ + if (zpool_label_disk(g_zfshdl, zhp, leafname) != 0) { + zed_log_msg(LOG_INFO, " zpool_label_disk: could not " + "label '%s' (%s)", leafname, + libzfs_error_description(g_zfshdl)); + + (void) zpool_vdev_online(zhp, fullpath, + ZFS_ONLINE_FORCEFAULT, &newstate); + return; + } + + /* + * The disk labeling is asynchronous on Linux. Just record + * this label request and return as there will be another + * disk add event for the partition after the labeling is + * completed. + */ + device = malloc(sizeof (pendingdev_t)); + (void) strlcpy(device->pd_physpath, physpath, + sizeof (device->pd_physpath)); + list_insert_tail(&g_device_list, device); + + zed_log_msg(LOG_INFO, " zpool_label_disk: async '%s' (%llu)", + leafname, (u_longlong_t)guid); + + return; /* resumes at EC_DEV_ADD.ESC_DISK for partition */ + + } else /* labeled */ { + boolean_t found = B_FALSE; + /* + * match up with request above to label the disk + */ + for (device = list_head(&g_device_list); device != NULL; + device = list_next(&g_device_list, device)) { + if (strcmp(physpath, device->pd_physpath) == 0) { + list_remove(&g_device_list, device); + free(device); + found = B_TRUE; + break; + } + zed_log_msg(LOG_INFO, "zpool_label_disk: %s != %s", + physpath, device->pd_physpath); + } + if (!found) { + /* unexpected partition slice encountered */ + zed_log_msg(LOG_INFO, "labeled disk %s unexpected here", + fullpath); + (void) zpool_vdev_online(zhp, fullpath, + ZFS_ONLINE_FORCEFAULT, &newstate); + return; + } + + zed_log_msg(LOG_INFO, " zpool_label_disk: resume '%s' (%llu)", + physpath, (u_longlong_t)guid); + + (void) snprintf(devpath, sizeof (devpath), "%s%s", + DEV_BYID_PATH, new_devid); + } + + /* + * Construct the root vdev to pass to zpool_vdev_attach(). While adding + * the entire vdev structure is harmless, we construct a reduced set of + * path/physpath/wholedisk to keep it simple. + */ + if (nvlist_alloc(&nvroot, NV_UNIQUE_NAME, 0) != 0) { + zed_log_msg(LOG_WARNING, "zfs_mod: nvlist_alloc out of memory"); + return; + } + if (nvlist_alloc(&newvd, NV_UNIQUE_NAME, 0) != 0) { + zed_log_msg(LOG_WARNING, "zfs_mod: nvlist_alloc out of memory"); + nvlist_free(nvroot); + return; + } + + if (nvlist_add_string(newvd, ZPOOL_CONFIG_TYPE, VDEV_TYPE_DISK) != 0 || + nvlist_add_string(newvd, ZPOOL_CONFIG_PATH, path) != 0 || + nvlist_add_string(newvd, ZPOOL_CONFIG_DEVID, new_devid) != 0 || + (physpath != NULL && nvlist_add_string(newvd, + ZPOOL_CONFIG_PHYS_PATH, physpath) != 0) || + (enc_sysfs_path != NULL && nvlist_add_string(newvd, + ZPOOL_CONFIG_VDEV_ENC_SYSFS_PATH, enc_sysfs_path) != 0) || + nvlist_add_uint64(newvd, ZPOOL_CONFIG_WHOLE_DISK, wholedisk) != 0 || + nvlist_add_string(nvroot, ZPOOL_CONFIG_TYPE, VDEV_TYPE_ROOT) != 0 || + nvlist_add_nvlist_array(nvroot, ZPOOL_CONFIG_CHILDREN, &newvd, + 1) != 0) { + zed_log_msg(LOG_WARNING, "zfs_mod: unable to add nvlist pairs"); + nvlist_free(newvd); + nvlist_free(nvroot); + return; + } + + nvlist_free(newvd); + + /* + * Wait for udev to verify the links exist, then auto-replace + * the leaf disk at same physical location. + */ + if (zpool_label_disk_wait(path, 3000) != 0) { + zed_log_msg(LOG_WARNING, "zfs_mod: expected replacement " + "disk %s is missing", path); + nvlist_free(nvroot); + return; + } + + ret = zpool_vdev_attach(zhp, fullpath, path, nvroot, B_TRUE, B_FALSE); + + zed_log_msg(LOG_INFO, " zpool_vdev_replace: %s with %s (%s)", + fullpath, path, (ret == 0) ? "no errors" : + libzfs_error_description(g_zfshdl)); + + nvlist_free(nvroot); +} + +/* + * Utility functions to find a vdev matching given criteria. + */ +typedef struct dev_data { + const char *dd_compare; + const char *dd_prop; + zfs_process_func_t dd_func; + boolean_t dd_found; + boolean_t dd_islabeled; + uint64_t dd_pool_guid; + uint64_t dd_vdev_guid; + const char *dd_new_devid; +} dev_data_t; + +static void +zfs_iter_vdev(zpool_handle_t *zhp, nvlist_t *nvl, void *data) +{ + dev_data_t *dp = data; + char *path = NULL; + uint_t c, children; + nvlist_t **child; + + /* + * First iterate over any children. + */ + if (nvlist_lookup_nvlist_array(nvl, ZPOOL_CONFIG_CHILDREN, + &child, &children) == 0) { + for (c = 0; c < children; c++) + zfs_iter_vdev(zhp, child[c], data); + } + + /* + * Iterate over any spares and cache devices + */ + if (nvlist_lookup_nvlist_array(nvl, ZPOOL_CONFIG_SPARES, + &child, &children) == 0) { + for (c = 0; c < children; c++) + zfs_iter_vdev(zhp, child[c], data); + } + if (nvlist_lookup_nvlist_array(nvl, ZPOOL_CONFIG_L2CACHE, + &child, &children) == 0) { + for (c = 0; c < children; c++) + zfs_iter_vdev(zhp, child[c], data); + } + + /* once a vdev was matched and processed there is nothing left to do */ + if (dp->dd_found) + return; + + /* + * Match by GUID if available otherwise fallback to devid or physical + */ + if (dp->dd_vdev_guid != 0) { + uint64_t guid; + + if (nvlist_lookup_uint64(nvl, ZPOOL_CONFIG_GUID, + &guid) != 0 || guid != dp->dd_vdev_guid) { + return; + } + zed_log_msg(LOG_INFO, " zfs_iter_vdev: matched on %llu", guid); + dp->dd_found = B_TRUE; + + } else if (dp->dd_compare != NULL) { + /* + * NOTE: On Linux there is an event for partition, so unlike + * illumos, substring matching is not required to accommodate + * the partition suffix. An exact match will be present in + * the dp->dd_compare value. + */ + if (nvlist_lookup_string(nvl, dp->dd_prop, &path) != 0 || + strcmp(dp->dd_compare, path) != 0) + return; + + zed_log_msg(LOG_INFO, " zfs_iter_vdev: matched %s on %s", + dp->dd_prop, path); + dp->dd_found = B_TRUE; + + /* pass the new devid for use by replacing code */ + if (dp->dd_new_devid != NULL) { + (void) nvlist_add_string(nvl, "new_devid", + dp->dd_new_devid); + } + } + + (dp->dd_func)(zhp, nvl, dp->dd_islabeled); +} + +static void +zfs_enable_ds(void *arg) +{ + unavailpool_t *pool = (unavailpool_t *)arg; + + (void) zpool_enable_datasets(pool->uap_zhp, NULL, 0); + zpool_close(pool->uap_zhp); + free(pool); +} + +static int +zfs_iter_pool(zpool_handle_t *zhp, void *data) +{ + nvlist_t *config, *nvl; + dev_data_t *dp = data; + uint64_t pool_guid; + unavailpool_t *pool; + + zed_log_msg(LOG_INFO, "zfs_iter_pool: evaluating vdevs on %s (by %s)", + zpool_get_name(zhp), dp->dd_vdev_guid ? "GUID" : dp->dd_prop); + + /* + * For each vdev in this pool, look for a match to apply dd_func + */ + if ((config = zpool_get_config(zhp, NULL)) != NULL) { + if (dp->dd_pool_guid == 0 || + (nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID, + &pool_guid) == 0 && pool_guid == dp->dd_pool_guid)) { + (void) nvlist_lookup_nvlist(config, + ZPOOL_CONFIG_VDEV_TREE, &nvl); + zfs_iter_vdev(zhp, nvl, data); + } + } + + /* + * if this pool was originally unavailable, + * then enable its datasets asynchronously + */ + if (g_enumeration_done) { + for (pool = list_head(&g_pool_list); pool != NULL; + pool = list_next(&g_pool_list, pool)) { + + if (strcmp(zpool_get_name(zhp), + zpool_get_name(pool->uap_zhp))) + continue; + if (zfs_toplevel_state(zhp) >= VDEV_STATE_DEGRADED) { + list_remove(&g_pool_list, pool); + (void) tpool_dispatch(g_tpool, zfs_enable_ds, + pool); + break; + } + } + } + + zpool_close(zhp); + return (dp->dd_found); /* cease iteration after a match */ +} + +/* + * Given a physical device location, iterate over all + * (pool, vdev) pairs which correspond to that location. + */ +static boolean_t +devphys_iter(const char *physical, const char *devid, zfs_process_func_t func, + boolean_t is_slice) +{ + dev_data_t data = { 0 }; + + data.dd_compare = physical; + data.dd_func = func; + data.dd_prop = ZPOOL_CONFIG_PHYS_PATH; + data.dd_found = B_FALSE; + data.dd_islabeled = is_slice; + data.dd_new_devid = devid; /* used by auto replace code */ + + (void) zpool_iter(g_zfshdl, zfs_iter_pool, &data); + + return (data.dd_found); +} + +/* + * Given a device identifier, find any vdevs with a matching devid. + * On Linux we can match devid directly which is always a whole disk. + */ +static boolean_t +devid_iter(const char *devid, zfs_process_func_t func, boolean_t is_slice) +{ + dev_data_t data = { 0 }; + + data.dd_compare = devid; + data.dd_func = func; + data.dd_prop = ZPOOL_CONFIG_DEVID; + data.dd_found = B_FALSE; + data.dd_islabeled = is_slice; + data.dd_new_devid = devid; + + (void) zpool_iter(g_zfshdl, zfs_iter_pool, &data); + + return (data.dd_found); +} + +/* + * Handle a EC_DEV_ADD.ESC_DISK event. + * + * illumos + * Expects: DEV_PHYS_PATH string in schema + * Matches: vdev's ZPOOL_CONFIG_PHYS_PATH or ZPOOL_CONFIG_DEVID + * + * path: '/dev/dsk/c0t1d0s0' (persistent) + * devid: 'id1,sd@SATA_____Hitachi_HDS72101______JP2940HZ3H74MC/a' + * phys_path: '/pci@0,0/pci103c,1609@11/disk@1,0:a' + * + * linux + * provides: DEV_PHYS_PATH and DEV_IDENTIFIER strings in schema + * Matches: vdev's ZPOOL_CONFIG_PHYS_PATH or ZPOOL_CONFIG_DEVID + * + * path: '/dev/sdc1' (not persistent) + * devid: 'ata-SAMSUNG_HD204UI_S2HGJD2Z805891-part1' + * phys_path: 'pci-0000:04:00.0-sas-0x4433221106000000-lun-0' + */ +static int +zfs_deliver_add(nvlist_t *nvl, boolean_t is_lofi) +{ + char *devpath = NULL, *devid; + boolean_t is_slice; + + /* + * Expecting a devid string and an optional physical location + */ + if (nvlist_lookup_string(nvl, DEV_IDENTIFIER, &devid) != 0) + return (-1); + + (void) nvlist_lookup_string(nvl, DEV_PHYS_PATH, &devpath); + + is_slice = (nvlist_lookup_boolean(nvl, DEV_IS_PART) == 0); + + zed_log_msg(LOG_INFO, "zfs_deliver_add: adding %s (%s) (is_slice %d)", + devid, devpath ? devpath : "NULL", is_slice); + + /* + * Iterate over all vdevs looking for a match in the following order: + * 1. ZPOOL_CONFIG_DEVID (identifies the unique disk) + * 2. ZPOOL_CONFIG_PHYS_PATH (identifies disk physical location). + * + * For disks, we only want to pay attention to vdevs marked as whole + * disks or are a multipath device. + */ + if (!devid_iter(devid, zfs_process_add, is_slice) && devpath != NULL) + (void) devphys_iter(devpath, devid, zfs_process_add, is_slice); + + return (0); +} + +/* + * Called when we receive a VDEV_CHECK event, which indicates a device could not + * be opened during initial pool open, but the autoreplace property was set on + * the pool. In this case, we treat it as if it were an add event. + */ +static int +zfs_deliver_check(nvlist_t *nvl) +{ + dev_data_t data = { 0 }; + + if (nvlist_lookup_uint64(nvl, ZFS_EV_POOL_GUID, + &data.dd_pool_guid) != 0 || + nvlist_lookup_uint64(nvl, ZFS_EV_VDEV_GUID, + &data.dd_vdev_guid) != 0 || + data.dd_vdev_guid == 0) + return (0); + + zed_log_msg(LOG_INFO, "zfs_deliver_check: pool '%llu', vdev %llu", + data.dd_pool_guid, data.dd_vdev_guid); + + data.dd_func = zfs_process_add; + + (void) zpool_iter(g_zfshdl, zfs_iter_pool, &data); + + return (0); +} + +static int +zfsdle_vdev_online(zpool_handle_t *zhp, void *data) +{ + char *devname = data; + boolean_t avail_spare, l2cache; + nvlist_t *tgt; + int error; + + zed_log_msg(LOG_INFO, "zfsdle_vdev_online: searching for '%s' in '%s'", + devname, zpool_get_name(zhp)); + + if ((tgt = zpool_find_vdev_by_physpath(zhp, devname, + &avail_spare, &l2cache, NULL)) != NULL) { + char *path, fullpath[MAXPATHLEN]; + uint64_t wholedisk; + + error = nvlist_lookup_string(tgt, ZPOOL_CONFIG_PATH, &path); + if (error) { + zpool_close(zhp); + return (0); + } + + error = nvlist_lookup_uint64(tgt, ZPOOL_CONFIG_WHOLE_DISK, + &wholedisk); + if (error) + wholedisk = 0; + + if (wholedisk) { + path = strrchr(path, '/'); + if (path != NULL) { + path = zfs_strip_partition(path + 1); + if (path == NULL) { + zpool_close(zhp); + return (0); + } + } else { + zpool_close(zhp); + return (0); + } + + (void) strlcpy(fullpath, path, sizeof (fullpath)); + free(path); + + /* + * We need to reopen the pool associated with this + * device so that the kernel can update the size of + * the expanded device. When expanding there is no + * need to restart the scrub from the beginning. + */ + boolean_t scrub_restart = B_FALSE; + (void) zpool_reopen_one(zhp, &scrub_restart); + } else { + (void) strlcpy(fullpath, path, sizeof (fullpath)); + } + + if (zpool_get_prop_int(zhp, ZPOOL_PROP_AUTOEXPAND, NULL)) { + vdev_state_t newstate; + + if (zpool_get_state(zhp) != POOL_STATE_UNAVAIL) { + error = zpool_vdev_online(zhp, fullpath, 0, + &newstate); + zed_log_msg(LOG_INFO, "zfsdle_vdev_online: " + "setting device '%s' to ONLINE state " + "in pool '%s': %d", fullpath, + zpool_get_name(zhp), error); + } + } + zpool_close(zhp); + return (1); + } + zpool_close(zhp); + return (0); +} + +/* + * This function handles the ESC_DEV_DLE device change event. Use the + * provided vdev guid when looking up a disk or partition, when the guid + * is not present assume the entire disk is owned by ZFS and append the + * expected -part1 partition information then lookup by physical path. + */ +static int +zfs_deliver_dle(nvlist_t *nvl) +{ + char *devname, name[MAXPATHLEN]; + uint64_t guid; + + if (nvlist_lookup_uint64(nvl, ZFS_EV_VDEV_GUID, &guid) == 0) { + sprintf(name, "%llu", (u_longlong_t)guid); + } else if (nvlist_lookup_string(nvl, DEV_PHYS_PATH, &devname) == 0) { + strlcpy(name, devname, MAXPATHLEN); + zfs_append_partition(name, MAXPATHLEN); + } else { + zed_log_msg(LOG_INFO, "zfs_deliver_dle: no guid or physpath"); + } + + if (zpool_iter(g_zfshdl, zfsdle_vdev_online, name) != 1) { + zed_log_msg(LOG_INFO, "zfs_deliver_dle: device '%s' not " + "found", name); + return (1); + } + + return (0); +} + +/* + * syseventd daemon module event handler + * + * Handles syseventd daemon zfs device related events: + * + * EC_DEV_ADD.ESC_DISK + * EC_DEV_STATUS.ESC_DEV_DLE + * EC_ZFS.ESC_ZFS_VDEV_CHECK + * + * Note: assumes only one thread active at a time (not thread safe) + */ +static int +zfs_slm_deliver_event(const char *class, const char *subclass, nvlist_t *nvl) +{ + int ret; + boolean_t is_lofi = B_FALSE, is_check = B_FALSE, is_dle = B_FALSE; + + if (strcmp(class, EC_DEV_ADD) == 0) { + /* + * We're mainly interested in disk additions, but we also listen + * for new loop devices, to allow for simplified testing. + */ + if (strcmp(subclass, ESC_DISK) == 0) + is_lofi = B_FALSE; + else if (strcmp(subclass, ESC_LOFI) == 0) + is_lofi = B_TRUE; + else + return (0); + + is_check = B_FALSE; + } else if (strcmp(class, EC_ZFS) == 0 && + strcmp(subclass, ESC_ZFS_VDEV_CHECK) == 0) { + /* + * This event signifies that a device failed to open + * during pool load, but the 'autoreplace' property was + * set, so we should pretend it's just been added. + */ + is_check = B_TRUE; + } else if (strcmp(class, EC_DEV_STATUS) == 0 && + strcmp(subclass, ESC_DEV_DLE) == 0) { + is_dle = B_TRUE; + } else { + return (0); + } + + if (is_dle) + ret = zfs_deliver_dle(nvl); + else if (is_check) + ret = zfs_deliver_check(nvl); + else + ret = zfs_deliver_add(nvl, is_lofi); + + return (ret); +} + +/*ARGSUSED*/ +static void * +zfs_enum_pools(void *arg) +{ + (void) zpool_iter(g_zfshdl, zfs_unavail_pool, (void *)&g_pool_list); + /* + * Linux - instead of using a thread pool, each list entry + * will spawn a thread when an unavailable pool transitions + * to available. zfs_slm_fini will wait for these threads. + */ + g_enumeration_done = B_TRUE; + return (NULL); +} + +/* + * called from zed daemon at startup + * + * sent messages from zevents or udev monitor + * + * For now, each agent has its own libzfs instance + */ +int +zfs_slm_init() +{ + if ((g_zfshdl = libzfs_init()) == NULL) + return (-1); + + /* + * collect a list of unavailable pools (asynchronously, + * since this can take a while) + */ + list_create(&g_pool_list, sizeof (struct unavailpool), + offsetof(struct unavailpool, uap_node)); + + if (pthread_create(&g_zfs_tid, NULL, zfs_enum_pools, NULL) != 0) { + list_destroy(&g_pool_list); + libzfs_fini(g_zfshdl); + return (-1); + } + + list_create(&g_device_list, sizeof (struct pendingdev), + offsetof(struct pendingdev, pd_node)); + + return (0); +} + +void +zfs_slm_fini() +{ + unavailpool_t *pool; + pendingdev_t *device; + + /* wait for zfs_enum_pools thread to complete */ + (void) pthread_join(g_zfs_tid, NULL); + /* destroy the thread pool */ + if (g_tpool != NULL) { + tpool_wait(g_tpool); + tpool_destroy(g_tpool); + } + + while ((pool = (list_head(&g_pool_list))) != NULL) { + list_remove(&g_pool_list, pool); + zpool_close(pool->uap_zhp); + free(pool); + } + list_destroy(&g_pool_list); + + while ((device = (list_head(&g_device_list))) != NULL) { + list_remove(&g_device_list, device); + free(device); + } + list_destroy(&g_device_list); + + libzfs_fini(g_zfshdl); +} + +void +zfs_slm_event(const char *class, const char *subclass, nvlist_t *nvl) +{ + zed_log_msg(LOG_INFO, "zfs_slm_event: %s.%s", class, subclass); + (void) zfs_slm_deliver_event(class, subclass, nvl); +} |