| /* |
| * 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 2015 Nexenta Systems, Inc. All rights reserved. |
| * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. |
| * Copyright (c) 2012, 2018 by Delphix. All rights reserved. |
| * Copyright 2015 RackTop Systems. |
| * Copyright (c) 2016, Intel Corporation. |
| */ |
| |
| /* |
| * Pool import support functions. |
| * |
| * Used by zpool, ztest, zdb, and zhack to locate importable configs. Since |
| * these commands are expected to run in the global zone, we can assume |
| * that the devices are all readable when called. |
| * |
| * To import a pool, we rely on reading the configuration information from the |
| * ZFS label of each device. If we successfully read the label, then we |
| * organize the configuration information in the following hierarchy: |
| * |
| * pool guid -> toplevel vdev guid -> label txg |
| * |
| * Duplicate entries matching this same tuple will be discarded. Once we have |
| * examined every device, we pick the best label txg config for each toplevel |
| * vdev. We then arrange these toplevel vdevs into a complete pool config, and |
| * update any paths that have changed. Finally, we attempt to import the pool |
| * using our derived config, and record the results. |
| */ |
| |
| #include <ctype.h> |
| #include <devid.h> |
| #include <dirent.h> |
| #include <errno.h> |
| #include <libintl.h> |
| #include <libgen.h> |
| #ifdef HAVE_LIBUDEV |
| #include <libudev.h> |
| #include <sched.h> |
| #endif |
| #include <stddef.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <sys/stat.h> |
| #include <unistd.h> |
| #include <fcntl.h> |
| #include <sys/dktp/fdisk.h> |
| #include <sys/vdev_impl.h> |
| #include <sys/fs/zfs.h> |
| #include <sys/vdev_impl.h> |
| |
| #include <blkid/blkid.h> |
| #include <thread_pool.h> |
| #include <libzutil.h> |
| #include <libnvpair.h> |
| |
| #define IMPORT_ORDER_PREFERRED_1 1 |
| #define IMPORT_ORDER_PREFERRED_2 2 |
| #define IMPORT_ORDER_SCAN_OFFSET 10 |
| #define IMPORT_ORDER_DEFAULT 100 |
| #define DEFAULT_IMPORT_PATH_SIZE 9 |
| |
| #define EZFS_BADCACHE "invalid or missing cache file" |
| #define EZFS_BADPATH "must be an absolute path" |
| #define EZFS_NOMEM "out of memory" |
| #define EZFS_EACESS "some devices require root privileges" |
| |
| typedef struct libpc_handle { |
| boolean_t lpc_printerr; |
| boolean_t lpc_open_access_error; |
| boolean_t lpc_desc_active; |
| char lpc_desc[1024]; |
| const pool_config_ops_t *lpc_ops; |
| void *lpc_lib_handle; |
| } libpc_handle_t; |
| |
| /*PRINTFLIKE2*/ |
| static void |
| zfs_error_aux(libpc_handle_t *hdl, const char *fmt, ...) |
| { |
| va_list ap; |
| |
| va_start(ap, fmt); |
| |
| (void) vsnprintf(hdl->lpc_desc, sizeof (hdl->lpc_desc), fmt, ap); |
| hdl->lpc_desc_active = B_TRUE; |
| |
| va_end(ap); |
| } |
| |
| static void |
| zfs_verror(libpc_handle_t *hdl, const char *error, const char *fmt, va_list ap) |
| { |
| char action[1024]; |
| |
| (void) vsnprintf(action, sizeof (action), fmt, ap); |
| |
| if (hdl->lpc_desc_active) |
| hdl->lpc_desc_active = B_FALSE; |
| else |
| hdl->lpc_desc[0] = '\0'; |
| |
| if (hdl->lpc_printerr) { |
| if (hdl->lpc_desc[0] != '\0') |
| error = hdl->lpc_desc; |
| |
| (void) fprintf(stderr, "%s: %s\n", action, error); |
| } |
| } |
| |
| /*PRINTFLIKE3*/ |
| static int |
| zfs_error_fmt(libpc_handle_t *hdl, const char *error, const char *fmt, ...) |
| { |
| va_list ap; |
| |
| va_start(ap, fmt); |
| |
| zfs_verror(hdl, error, fmt, ap); |
| |
| va_end(ap); |
| |
| return (-1); |
| } |
| |
| static int |
| zfs_error(libpc_handle_t *hdl, const char *error, const char *msg) |
| { |
| return (zfs_error_fmt(hdl, error, "%s", msg)); |
| } |
| |
| static int |
| no_memory(libpc_handle_t *hdl) |
| { |
| zfs_error(hdl, EZFS_NOMEM, "internal error"); |
| exit(1); |
| } |
| |
| static void * |
| zfs_alloc(libpc_handle_t *hdl, size_t size) |
| { |
| void *data; |
| |
| if ((data = calloc(1, size)) == NULL) |
| (void) no_memory(hdl); |
| |
| return (data); |
| } |
| |
| static char * |
| zfs_strdup(libpc_handle_t *hdl, const char *str) |
| { |
| char *ret; |
| |
| if ((ret = strdup(str)) == NULL) |
| (void) no_memory(hdl); |
| |
| return (ret); |
| } |
| |
| /* |
| * Intermediate structures used to gather configuration information. |
| */ |
| typedef struct config_entry { |
| uint64_t ce_txg; |
| nvlist_t *ce_config; |
| struct config_entry *ce_next; |
| } config_entry_t; |
| |
| typedef struct vdev_entry { |
| uint64_t ve_guid; |
| config_entry_t *ve_configs; |
| struct vdev_entry *ve_next; |
| } vdev_entry_t; |
| |
| typedef struct pool_entry { |
| uint64_t pe_guid; |
| vdev_entry_t *pe_vdevs; |
| struct pool_entry *pe_next; |
| } pool_entry_t; |
| |
| typedef struct name_entry { |
| char *ne_name; |
| uint64_t ne_guid; |
| uint64_t ne_order; |
| uint64_t ne_num_labels; |
| struct name_entry *ne_next; |
| } name_entry_t; |
| |
| typedef struct pool_list { |
| pool_entry_t *pools; |
| name_entry_t *names; |
| } pool_list_t; |
| |
| #define ZVOL_ROOT "/dev/zvol" |
| #define DEV_BYID_PATH "/dev/disk/by-id/" |
| |
| /* |
| * Linux persistent device strings for vdev labels |
| * |
| * based on libudev for consistency with libudev disk add/remove events |
| */ |
| |
| typedef struct vdev_dev_strs { |
| char vds_devid[128]; |
| char vds_devphys[128]; |
| } vdev_dev_strs_t; |
| |
| #ifdef HAVE_LIBUDEV |
| /* |
| * Obtain the persistent device id string (describes what) |
| * |
| * used by ZED vdev matching for auto-{online,expand,replace} |
| */ |
| int |
| zfs_device_get_devid(struct udev_device *dev, char *bufptr, size_t buflen) |
| { |
| struct udev_list_entry *entry; |
| const char *bus; |
| char devbyid[MAXPATHLEN]; |
| |
| /* The bus based by-id path is preferred */ |
| bus = udev_device_get_property_value(dev, "ID_BUS"); |
| |
| if (bus == NULL) { |
| const char *dm_uuid; |
| |
| /* |
| * For multipath nodes use the persistent uuid based identifier |
| * |
| * Example: /dev/disk/by-id/dm-uuid-mpath-35000c5006304de3f |
| */ |
| dm_uuid = udev_device_get_property_value(dev, "DM_UUID"); |
| if (dm_uuid != NULL) { |
| (void) snprintf(bufptr, buflen, "dm-uuid-%s", dm_uuid); |
| return (0); |
| } |
| |
| /* |
| * For volumes use the persistent /dev/zvol/dataset identifier |
| */ |
| entry = udev_device_get_devlinks_list_entry(dev); |
| while (entry != NULL) { |
| const char *name; |
| |
| name = udev_list_entry_get_name(entry); |
| if (strncmp(name, ZVOL_ROOT, strlen(ZVOL_ROOT)) == 0) { |
| (void) strlcpy(bufptr, name, buflen); |
| return (0); |
| } |
| entry = udev_list_entry_get_next(entry); |
| } |
| |
| /* |
| * NVME 'by-id' symlinks are similar to bus case |
| */ |
| struct udev_device *parent; |
| |
| parent = udev_device_get_parent_with_subsystem_devtype(dev, |
| "nvme", NULL); |
| if (parent != NULL) |
| bus = "nvme"; /* continue with bus symlink search */ |
| else |
| return (ENODATA); |
| } |
| |
| /* |
| * locate the bus specific by-id link |
| */ |
| (void) snprintf(devbyid, sizeof (devbyid), "%s%s-", DEV_BYID_PATH, bus); |
| entry = udev_device_get_devlinks_list_entry(dev); |
| while (entry != NULL) { |
| const char *name; |
| |
| name = udev_list_entry_get_name(entry); |
| if (strncmp(name, devbyid, strlen(devbyid)) == 0) { |
| name += strlen(DEV_BYID_PATH); |
| (void) strlcpy(bufptr, name, buflen); |
| return (0); |
| } |
| entry = udev_list_entry_get_next(entry); |
| } |
| |
| return (ENODATA); |
| } |
| |
| /* |
| * Obtain the persistent physical location string (describes where) |
| * |
| * used by ZED vdev matching for auto-{online,expand,replace} |
| */ |
| int |
| zfs_device_get_physical(struct udev_device *dev, char *bufptr, size_t buflen) |
| { |
| const char *physpath = NULL; |
| struct udev_list_entry *entry; |
| |
| /* |
| * Normal disks use ID_PATH for their physical path. |
| */ |
| physpath = udev_device_get_property_value(dev, "ID_PATH"); |
| if (physpath != NULL && strlen(physpath) > 0) { |
| (void) strlcpy(bufptr, physpath, buflen); |
| return (0); |
| } |
| |
| /* |
| * Device mapper devices are virtual and don't have a physical |
| * path. For them we use ID_VDEV instead, which is setup via the |
| * /etc/vdev_id.conf file. ID_VDEV provides a persistent path |
| * to a virtual device. If you don't have vdev_id.conf setup, |
| * you cannot use multipath autoreplace with device mapper. |
| */ |
| physpath = udev_device_get_property_value(dev, "ID_VDEV"); |
| if (physpath != NULL && strlen(physpath) > 0) { |
| (void) strlcpy(bufptr, physpath, buflen); |
| return (0); |
| } |
| |
| /* |
| * For ZFS volumes use the persistent /dev/zvol/dataset identifier |
| */ |
| entry = udev_device_get_devlinks_list_entry(dev); |
| while (entry != NULL) { |
| physpath = udev_list_entry_get_name(entry); |
| if (strncmp(physpath, ZVOL_ROOT, strlen(ZVOL_ROOT)) == 0) { |
| (void) strlcpy(bufptr, physpath, buflen); |
| return (0); |
| } |
| entry = udev_list_entry_get_next(entry); |
| } |
| |
| /* |
| * For all other devices fallback to using the by-uuid name. |
| */ |
| entry = udev_device_get_devlinks_list_entry(dev); |
| while (entry != NULL) { |
| physpath = udev_list_entry_get_name(entry); |
| if (strncmp(physpath, "/dev/disk/by-uuid", 17) == 0) { |
| (void) strlcpy(bufptr, physpath, buflen); |
| return (0); |
| } |
| entry = udev_list_entry_get_next(entry); |
| } |
| |
| return (ENODATA); |
| } |
| |
| /* |
| * A disk is considered a multipath whole disk when: |
| * DEVNAME key value has "dm-" |
| * DM_NAME key value has "mpath" prefix |
| * DM_UUID key exists |
| * ID_PART_TABLE_TYPE key does not exist or is not gpt |
| */ |
| static boolean_t |
| udev_mpath_whole_disk(struct udev_device *dev) |
| { |
| const char *devname, *type, *uuid; |
| |
| devname = udev_device_get_property_value(dev, "DEVNAME"); |
| type = udev_device_get_property_value(dev, "ID_PART_TABLE_TYPE"); |
| uuid = udev_device_get_property_value(dev, "DM_UUID"); |
| |
| if ((devname != NULL && strncmp(devname, "/dev/dm-", 8) == 0) && |
| ((type == NULL) || (strcmp(type, "gpt") != 0)) && |
| (uuid != NULL)) { |
| return (B_TRUE); |
| } |
| |
| return (B_FALSE); |
| } |
| |
| static int |
| udev_device_is_ready(struct udev_device *dev) |
| { |
| #ifdef HAVE_LIBUDEV_UDEV_DEVICE_GET_IS_INITIALIZED |
| return (udev_device_get_is_initialized(dev)); |
| #else |
| /* wait for DEVLINKS property to be initialized */ |
| return (udev_device_get_property_value(dev, "DEVLINKS") != NULL); |
| #endif |
| } |
| #endif /* HAVE_LIBUDEV */ |
| |
| /* |
| * Wait up to timeout_ms for udev to set up the device node. The device is |
| * considered ready when libudev determines it has been initialized, all of |
| * the device links have been verified to exist, and it has been allowed to |
| * settle. At this point the device the device can be accessed reliably. |
| * Depending on the complexity of the udev rules this process could take |
| * several seconds. |
| */ |
| int |
| zpool_label_disk_wait(const char *path, int timeout_ms) |
| { |
| #ifdef HAVE_LIBUDEV |
| struct udev *udev; |
| struct udev_device *dev = NULL; |
| char nodepath[MAXPATHLEN]; |
| char *sysname = NULL; |
| int ret = ENODEV; |
| int settle_ms = 50; |
| long sleep_ms = 10; |
| hrtime_t start, settle; |
| |
| if ((udev = udev_new()) == NULL) |
| return (ENXIO); |
| |
| start = gethrtime(); |
| settle = 0; |
| |
| do { |
| if (sysname == NULL) { |
| if (realpath(path, nodepath) != NULL) { |
| sysname = strrchr(nodepath, '/') + 1; |
| } else { |
| (void) usleep(sleep_ms * MILLISEC); |
| continue; |
| } |
| } |
| |
| dev = udev_device_new_from_subsystem_sysname(udev, |
| "block", sysname); |
| if ((dev != NULL) && udev_device_is_ready(dev)) { |
| struct udev_list_entry *links, *link = NULL; |
| |
| ret = 0; |
| links = udev_device_get_devlinks_list_entry(dev); |
| |
| udev_list_entry_foreach(link, links) { |
| struct stat64 statbuf; |
| const char *name; |
| |
| name = udev_list_entry_get_name(link); |
| errno = 0; |
| if (stat64(name, &statbuf) == 0 && errno == 0) |
| continue; |
| |
| settle = 0; |
| ret = ENODEV; |
| break; |
| } |
| |
| if (ret == 0) { |
| if (settle == 0) { |
| settle = gethrtime(); |
| } else if (NSEC2MSEC(gethrtime() - settle) >= |
| settle_ms) { |
| udev_device_unref(dev); |
| break; |
| } |
| } |
| } |
| |
| udev_device_unref(dev); |
| (void) usleep(sleep_ms * MILLISEC); |
| |
| } while (NSEC2MSEC(gethrtime() - start) < timeout_ms); |
| |
| udev_unref(udev); |
| |
| return (ret); |
| #else |
| int settle_ms = 50; |
| long sleep_ms = 10; |
| hrtime_t start, settle; |
| struct stat64 statbuf; |
| |
| start = gethrtime(); |
| settle = 0; |
| |
| do { |
| errno = 0; |
| if ((stat64(path, &statbuf) == 0) && (errno == 0)) { |
| if (settle == 0) |
| settle = gethrtime(); |
| else if (NSEC2MSEC(gethrtime() - settle) >= settle_ms) |
| return (0); |
| } else if (errno != ENOENT) { |
| return (errno); |
| } |
| |
| usleep(sleep_ms * MILLISEC); |
| } while (NSEC2MSEC(gethrtime() - start) < timeout_ms); |
| |
| return (ENODEV); |
| #endif /* HAVE_LIBUDEV */ |
| } |
| |
| /* |
| * Encode the persistent devices strings |
| * used for the vdev disk label |
| */ |
| static int |
| encode_device_strings(const char *path, vdev_dev_strs_t *ds, |
| boolean_t wholedisk) |
| { |
| #ifdef HAVE_LIBUDEV |
| struct udev *udev; |
| struct udev_device *dev = NULL; |
| char nodepath[MAXPATHLEN]; |
| char *sysname; |
| int ret = ENODEV; |
| hrtime_t start; |
| |
| if ((udev = udev_new()) == NULL) |
| return (ENXIO); |
| |
| /* resolve path to a runtime device node instance */ |
| if (realpath(path, nodepath) == NULL) |
| goto no_dev; |
| |
| sysname = strrchr(nodepath, '/') + 1; |
| |
| /* |
| * Wait up to 3 seconds for udev to set up the device node context |
| */ |
| start = gethrtime(); |
| do { |
| dev = udev_device_new_from_subsystem_sysname(udev, "block", |
| sysname); |
| if (dev == NULL) |
| goto no_dev; |
| if (udev_device_is_ready(dev)) |
| break; /* udev ready */ |
| |
| udev_device_unref(dev); |
| dev = NULL; |
| |
| if (NSEC2MSEC(gethrtime() - start) < 10) |
| (void) sched_yield(); /* yield/busy wait up to 10ms */ |
| else |
| (void) usleep(10 * MILLISEC); |
| |
| } while (NSEC2MSEC(gethrtime() - start) < (3 * MILLISEC)); |
| |
| if (dev == NULL) |
| goto no_dev; |
| |
| /* |
| * Only whole disks require extra device strings |
| */ |
| if (!wholedisk && !udev_mpath_whole_disk(dev)) |
| goto no_dev; |
| |
| ret = zfs_device_get_devid(dev, ds->vds_devid, sizeof (ds->vds_devid)); |
| if (ret != 0) |
| goto no_dev_ref; |
| |
| /* physical location string (optional) */ |
| if (zfs_device_get_physical(dev, ds->vds_devphys, |
| sizeof (ds->vds_devphys)) != 0) { |
| ds->vds_devphys[0] = '\0'; /* empty string --> not available */ |
| } |
| |
| no_dev_ref: |
| udev_device_unref(dev); |
| no_dev: |
| udev_unref(udev); |
| |
| return (ret); |
| #else |
| return (ENOENT); |
| #endif |
| } |
| |
| /* |
| * Update a leaf vdev's persistent device strings (Linux only) |
| * |
| * - only applies for a dedicated leaf vdev (aka whole disk) |
| * - updated during pool create|add|attach|import |
| * - used for matching device matching during auto-{online,expand,replace} |
| * - stored in a leaf disk config label (i.e. alongside 'path' NVP) |
| * - these strings are currently not used in kernel (i.e. for vdev_disk_open) |
| * |
| * single device node example: |
| * devid: 'scsi-MG03SCA300_350000494a8cb3d67-part1' |
| * phys_path: 'pci-0000:04:00.0-sas-0x50000394a8cb3d67-lun-0' |
| * |
| * multipath device node example: |
| * devid: 'dm-uuid-mpath-35000c5006304de3f' |
| * |
| * We also store the enclosure sysfs path for turning on enclosure LEDs |
| * (if applicable): |
| * vdev_enc_sysfs_path: '/sys/class/enclosure/11:0:1:0/SLOT 4' |
| */ |
| void |
| update_vdev_config_dev_strs(nvlist_t *nv) |
| { |
| vdev_dev_strs_t vds; |
| char *env, *type, *path; |
| uint64_t wholedisk = 0; |
| char *upath, *spath; |
| |
| /* |
| * For the benefit of legacy ZFS implementations, allow |
| * for opting out of devid strings in the vdev label. |
| * |
| * example use: |
| * env ZFS_VDEV_DEVID_OPT_OUT=YES zpool import dozer |
| * |
| * explanation: |
| * Older ZFS on Linux implementations had issues when attempting to |
| * display pool config VDEV names if a "devid" NVP value is present |
| * in the pool's config. |
| * |
| * For example, a pool that originated on illumos platform would |
| * have a devid value in the config and "zpool status" would fail |
| * when listing the config. |
| * |
| * A pool can be stripped of any "devid" values on import or |
| * prevented from adding them on zpool create|add by setting |
| * ZFS_VDEV_DEVID_OPT_OUT. |
| */ |
| env = getenv("ZFS_VDEV_DEVID_OPT_OUT"); |
| if (env && (strtoul(env, NULL, 0) > 0 || |
| !strncasecmp(env, "YES", 3) || !strncasecmp(env, "ON", 2))) { |
| (void) nvlist_remove_all(nv, ZPOOL_CONFIG_DEVID); |
| (void) nvlist_remove_all(nv, ZPOOL_CONFIG_PHYS_PATH); |
| return; |
| } |
| |
| if (nvlist_lookup_string(nv, ZPOOL_CONFIG_TYPE, &type) != 0 || |
| strcmp(type, VDEV_TYPE_DISK) != 0) { |
| return; |
| } |
| if (nvlist_lookup_string(nv, ZPOOL_CONFIG_PATH, &path) != 0) |
| return; |
| (void) nvlist_lookup_uint64(nv, ZPOOL_CONFIG_WHOLE_DISK, &wholedisk); |
| |
| /* |
| * Update device string values in config nvlist |
| */ |
| if (encode_device_strings(path, &vds, (boolean_t)wholedisk) == 0) { |
| (void) nvlist_add_string(nv, ZPOOL_CONFIG_DEVID, vds.vds_devid); |
| if (vds.vds_devphys[0] != '\0') { |
| (void) nvlist_add_string(nv, ZPOOL_CONFIG_PHYS_PATH, |
| vds.vds_devphys); |
| } |
| |
| /* Add enclosure sysfs path (if disk is in an enclosure) */ |
| upath = zfs_get_underlying_path(path); |
| spath = zfs_get_enclosure_sysfs_path(upath); |
| if (spath) |
| nvlist_add_string(nv, ZPOOL_CONFIG_VDEV_ENC_SYSFS_PATH, |
| spath); |
| else |
| nvlist_remove_all(nv, ZPOOL_CONFIG_VDEV_ENC_SYSFS_PATH); |
| |
| free(upath); |
| free(spath); |
| } else { |
| /* clear out any stale entries */ |
| (void) nvlist_remove_all(nv, ZPOOL_CONFIG_DEVID); |
| (void) nvlist_remove_all(nv, ZPOOL_CONFIG_PHYS_PATH); |
| (void) nvlist_remove_all(nv, ZPOOL_CONFIG_VDEV_ENC_SYSFS_PATH); |
| } |
| } |
| |
| /* |
| * Go through and fix up any path and/or devid information for the given vdev |
| * configuration. |
| */ |
| static int |
| fix_paths(libpc_handle_t *hdl, nvlist_t *nv, name_entry_t *names) |
| { |
| nvlist_t **child; |
| uint_t c, children; |
| uint64_t guid; |
| name_entry_t *ne, *best; |
| char *path; |
| |
| if (nvlist_lookup_nvlist_array(nv, ZPOOL_CONFIG_CHILDREN, |
| &child, &children) == 0) { |
| for (c = 0; c < children; c++) |
| if (fix_paths(hdl, child[c], names) != 0) |
| return (-1); |
| return (0); |
| } |
| |
| /* |
| * This is a leaf (file or disk) vdev. In either case, go through |
| * the name list and see if we find a matching guid. If so, replace |
| * the path and see if we can calculate a new devid. |
| * |
| * There may be multiple names associated with a particular guid, in |
| * which case we have overlapping partitions or multiple paths to the |
| * same disk. In this case we prefer to use the path name which |
| * matches the ZPOOL_CONFIG_PATH. If no matching entry is found we |
| * use the lowest order device which corresponds to the first match |
| * while traversing the ZPOOL_IMPORT_PATH search path. |
| */ |
| verify(nvlist_lookup_uint64(nv, ZPOOL_CONFIG_GUID, &guid) == 0); |
| if (nvlist_lookup_string(nv, ZPOOL_CONFIG_PATH, &path) != 0) |
| path = NULL; |
| |
| best = NULL; |
| for (ne = names; ne != NULL; ne = ne->ne_next) { |
| if (ne->ne_guid == guid) { |
| if (path == NULL) { |
| best = ne; |
| break; |
| } |
| |
| if ((strlen(path) == strlen(ne->ne_name)) && |
| strncmp(path, ne->ne_name, strlen(path)) == 0) { |
| best = ne; |
| break; |
| } |
| |
| if (best == NULL) { |
| best = ne; |
| continue; |
| } |
| |
| /* Prefer paths with move vdev labels. */ |
| if (ne->ne_num_labels > best->ne_num_labels) { |
| best = ne; |
| continue; |
| } |
| |
| /* Prefer paths earlier in the search order. */ |
| if (ne->ne_num_labels == best->ne_num_labels && |
| ne->ne_order < best->ne_order) { |
| best = ne; |
| continue; |
| } |
| } |
| } |
| |
| if (best == NULL) |
| return (0); |
| |
| if (nvlist_add_string(nv, ZPOOL_CONFIG_PATH, best->ne_name) != 0) |
| return (-1); |
| |
| /* Linux only - update ZPOOL_CONFIG_DEVID and ZPOOL_CONFIG_PHYS_PATH */ |
| update_vdev_config_dev_strs(nv); |
| |
| return (0); |
| } |
| |
| /* |
| * Add the given configuration to the list of known devices. |
| */ |
| static int |
| add_config(libpc_handle_t *hdl, pool_list_t *pl, const char *path, |
| int order, int num_labels, nvlist_t *config) |
| { |
| uint64_t pool_guid, vdev_guid, top_guid, txg, state; |
| pool_entry_t *pe; |
| vdev_entry_t *ve; |
| config_entry_t *ce; |
| name_entry_t *ne; |
| |
| /* |
| * If this is a hot spare not currently in use or level 2 cache |
| * device, add it to the list of names to translate, but don't do |
| * anything else. |
| */ |
| if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_STATE, |
| &state) == 0 && |
| (state == POOL_STATE_SPARE || state == POOL_STATE_L2CACHE) && |
| nvlist_lookup_uint64(config, ZPOOL_CONFIG_GUID, &vdev_guid) == 0) { |
| if ((ne = zfs_alloc(hdl, sizeof (name_entry_t))) == NULL) |
| return (-1); |
| |
| if ((ne->ne_name = zfs_strdup(hdl, path)) == NULL) { |
| free(ne); |
| return (-1); |
| } |
| ne->ne_guid = vdev_guid; |
| ne->ne_order = order; |
| ne->ne_num_labels = num_labels; |
| ne->ne_next = pl->names; |
| pl->names = ne; |
| |
| return (0); |
| } |
| |
| /* |
| * If we have a valid config but cannot read any of these fields, then |
| * it means we have a half-initialized label. In vdev_label_init() |
| * we write a label with txg == 0 so that we can identify the device |
| * in case the user refers to the same disk later on. If we fail to |
| * create the pool, we'll be left with a label in this state |
| * which should not be considered part of a valid pool. |
| */ |
| if (nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID, |
| &pool_guid) != 0 || |
| nvlist_lookup_uint64(config, ZPOOL_CONFIG_GUID, |
| &vdev_guid) != 0 || |
| nvlist_lookup_uint64(config, ZPOOL_CONFIG_TOP_GUID, |
| &top_guid) != 0 || |
| nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_TXG, |
| &txg) != 0 || txg == 0) { |
| return (0); |
| } |
| |
| /* |
| * First, see if we know about this pool. If not, then add it to the |
| * list of known pools. |
| */ |
| for (pe = pl->pools; pe != NULL; pe = pe->pe_next) { |
| if (pe->pe_guid == pool_guid) |
| break; |
| } |
| |
| if (pe == NULL) { |
| if ((pe = zfs_alloc(hdl, sizeof (pool_entry_t))) == NULL) { |
| return (-1); |
| } |
| pe->pe_guid = pool_guid; |
| pe->pe_next = pl->pools; |
| pl->pools = pe; |
| } |
| |
| /* |
| * Second, see if we know about this toplevel vdev. Add it if its |
| * missing. |
| */ |
| for (ve = pe->pe_vdevs; ve != NULL; ve = ve->ve_next) { |
| if (ve->ve_guid == top_guid) |
| break; |
| } |
| |
| if (ve == NULL) { |
| if ((ve = zfs_alloc(hdl, sizeof (vdev_entry_t))) == NULL) { |
| return (-1); |
| } |
| ve->ve_guid = top_guid; |
| ve->ve_next = pe->pe_vdevs; |
| pe->pe_vdevs = ve; |
| } |
| |
| /* |
| * Third, see if we have a config with a matching transaction group. If |
| * so, then we do nothing. Otherwise, add it to the list of known |
| * configs. |
| */ |
| for (ce = ve->ve_configs; ce != NULL; ce = ce->ce_next) { |
| if (ce->ce_txg == txg) |
| break; |
| } |
| |
| if (ce == NULL) { |
| if ((ce = zfs_alloc(hdl, sizeof (config_entry_t))) == NULL) { |
| return (-1); |
| } |
| ce->ce_txg = txg; |
| ce->ce_config = fnvlist_dup(config); |
| ce->ce_next = ve->ve_configs; |
| ve->ve_configs = ce; |
| } |
| |
| /* |
| * At this point we've successfully added our config to the list of |
| * known configs. The last thing to do is add the vdev guid -> path |
| * mappings so that we can fix up the configuration as necessary before |
| * doing the import. |
| */ |
| if ((ne = zfs_alloc(hdl, sizeof (name_entry_t))) == NULL) |
| return (-1); |
| |
| if ((ne->ne_name = zfs_strdup(hdl, path)) == NULL) { |
| free(ne); |
| return (-1); |
| } |
| |
| ne->ne_guid = vdev_guid; |
| ne->ne_order = order; |
| ne->ne_num_labels = num_labels; |
| ne->ne_next = pl->names; |
| pl->names = ne; |
| |
| return (0); |
| } |
| |
| static int |
| pool_active(libpc_handle_t *hdl, const char *name, uint64_t guid, |
| boolean_t *isactive) |
| { |
| ASSERT(hdl->lpc_ops->pco_pool_active != NULL); |
| |
| int error = hdl->lpc_ops->pco_pool_active(hdl->lpc_lib_handle, name, |
| guid, isactive); |
| |
| return (error); |
| } |
| |
| static nvlist_t * |
| refresh_config(libpc_handle_t *hdl, nvlist_t *tryconfig) |
| { |
| ASSERT(hdl->lpc_ops->pco_refresh_config != NULL); |
| |
| return (hdl->lpc_ops->pco_refresh_config(hdl->lpc_lib_handle, |
| tryconfig)); |
| } |
| |
| /* |
| * Determine if the vdev id is a hole in the namespace. |
| */ |
| static boolean_t |
| vdev_is_hole(uint64_t *hole_array, uint_t holes, uint_t id) |
| { |
| int c; |
| |
| for (c = 0; c < holes; c++) { |
| |
| /* Top-level is a hole */ |
| if (hole_array[c] == id) |
| return (B_TRUE); |
| } |
| return (B_FALSE); |
| } |
| |
| /* |
| * Convert our list of pools into the definitive set of configurations. We |
| * start by picking the best config for each toplevel vdev. Once that's done, |
| * we assemble the toplevel vdevs into a full config for the pool. We make a |
| * pass to fix up any incorrect paths, and then add it to the main list to |
| * return to the user. |
| */ |
| static nvlist_t * |
| get_configs(libpc_handle_t *hdl, pool_list_t *pl, boolean_t active_ok, |
| nvlist_t *policy) |
| { |
| pool_entry_t *pe; |
| vdev_entry_t *ve; |
| config_entry_t *ce; |
| nvlist_t *ret = NULL, *config = NULL, *tmp = NULL, *nvtop, *nvroot; |
| nvlist_t **spares, **l2cache; |
| uint_t i, nspares, nl2cache; |
| boolean_t config_seen; |
| uint64_t best_txg; |
| char *name, *hostname = NULL; |
| uint64_t guid; |
| uint_t children = 0; |
| nvlist_t **child = NULL; |
| uint_t holes; |
| uint64_t *hole_array, max_id; |
| uint_t c; |
| boolean_t isactive; |
| uint64_t hostid; |
| nvlist_t *nvl; |
| boolean_t valid_top_config = B_FALSE; |
| |
| if (nvlist_alloc(&ret, 0, 0) != 0) |
| goto nomem; |
| |
| for (pe = pl->pools; pe != NULL; pe = pe->pe_next) { |
| uint64_t id, max_txg = 0; |
| |
| if (nvlist_alloc(&config, NV_UNIQUE_NAME, 0) != 0) |
| goto nomem; |
| config_seen = B_FALSE; |
| |
| /* |
| * Iterate over all toplevel vdevs. Grab the pool configuration |
| * from the first one we find, and then go through the rest and |
| * add them as necessary to the 'vdevs' member of the config. |
| */ |
| for (ve = pe->pe_vdevs; ve != NULL; ve = ve->ve_next) { |
| |
| /* |
| * Determine the best configuration for this vdev by |
| * selecting the config with the latest transaction |
| * group. |
| */ |
| best_txg = 0; |
| for (ce = ve->ve_configs; ce != NULL; |
| ce = ce->ce_next) { |
| |
| if (ce->ce_txg > best_txg) { |
| tmp = ce->ce_config; |
| best_txg = ce->ce_txg; |
| } |
| } |
| |
| /* |
| * We rely on the fact that the max txg for the |
| * pool will contain the most up-to-date information |
| * about the valid top-levels in the vdev namespace. |
| */ |
| if (best_txg > max_txg) { |
| (void) nvlist_remove(config, |
| ZPOOL_CONFIG_VDEV_CHILDREN, |
| DATA_TYPE_UINT64); |
| (void) nvlist_remove(config, |
| ZPOOL_CONFIG_HOLE_ARRAY, |
| DATA_TYPE_UINT64_ARRAY); |
| |
| max_txg = best_txg; |
| hole_array = NULL; |
| holes = 0; |
| max_id = 0; |
| valid_top_config = B_FALSE; |
| |
| if (nvlist_lookup_uint64(tmp, |
| ZPOOL_CONFIG_VDEV_CHILDREN, &max_id) == 0) { |
| verify(nvlist_add_uint64(config, |
| ZPOOL_CONFIG_VDEV_CHILDREN, |
| max_id) == 0); |
| valid_top_config = B_TRUE; |
| } |
| |
| if (nvlist_lookup_uint64_array(tmp, |
| ZPOOL_CONFIG_HOLE_ARRAY, &hole_array, |
| &holes) == 0) { |
| verify(nvlist_add_uint64_array(config, |
| ZPOOL_CONFIG_HOLE_ARRAY, |
| hole_array, holes) == 0); |
| } |
| } |
| |
| if (!config_seen) { |
| /* |
| * Copy the relevant pieces of data to the pool |
| * configuration: |
| * |
| * version |
| * pool guid |
| * name |
| * comment (if available) |
| * pool state |
| * hostid (if available) |
| * hostname (if available) |
| */ |
| uint64_t state, version; |
| char *comment = NULL; |
| |
| version = fnvlist_lookup_uint64(tmp, |
| ZPOOL_CONFIG_VERSION); |
| fnvlist_add_uint64(config, |
| ZPOOL_CONFIG_VERSION, version); |
| guid = fnvlist_lookup_uint64(tmp, |
| ZPOOL_CONFIG_POOL_GUID); |
| fnvlist_add_uint64(config, |
| ZPOOL_CONFIG_POOL_GUID, guid); |
| name = fnvlist_lookup_string(tmp, |
| ZPOOL_CONFIG_POOL_NAME); |
| fnvlist_add_string(config, |
| ZPOOL_CONFIG_POOL_NAME, name); |
| |
| if (nvlist_lookup_string(tmp, |
| ZPOOL_CONFIG_COMMENT, &comment) == 0) |
| fnvlist_add_string(config, |
| ZPOOL_CONFIG_COMMENT, comment); |
| |
| state = fnvlist_lookup_uint64(tmp, |
| ZPOOL_CONFIG_POOL_STATE); |
| fnvlist_add_uint64(config, |
| ZPOOL_CONFIG_POOL_STATE, state); |
| |
| hostid = 0; |
| if (nvlist_lookup_uint64(tmp, |
| ZPOOL_CONFIG_HOSTID, &hostid) == 0) { |
| fnvlist_add_uint64(config, |
| ZPOOL_CONFIG_HOSTID, hostid); |
| hostname = fnvlist_lookup_string(tmp, |
| ZPOOL_CONFIG_HOSTNAME); |
| fnvlist_add_string(config, |
| ZPOOL_CONFIG_HOSTNAME, hostname); |
| } |
| |
| config_seen = B_TRUE; |
| } |
| |
| /* |
| * Add this top-level vdev to the child array. |
| */ |
| verify(nvlist_lookup_nvlist(tmp, |
| ZPOOL_CONFIG_VDEV_TREE, &nvtop) == 0); |
| verify(nvlist_lookup_uint64(nvtop, ZPOOL_CONFIG_ID, |
| &id) == 0); |
| |
| if (id >= children) { |
| nvlist_t **newchild; |
| |
| newchild = zfs_alloc(hdl, (id + 1) * |
| sizeof (nvlist_t *)); |
| if (newchild == NULL) |
| goto nomem; |
| |
| for (c = 0; c < children; c++) |
| newchild[c] = child[c]; |
| |
| free(child); |
| child = newchild; |
| children = id + 1; |
| } |
| if (nvlist_dup(nvtop, &child[id], 0) != 0) |
| goto nomem; |
| |
| } |
| |
| /* |
| * If we have information about all the top-levels then |
| * clean up the nvlist which we've constructed. This |
| * means removing any extraneous devices that are |
| * beyond the valid range or adding devices to the end |
| * of our array which appear to be missing. |
| */ |
| if (valid_top_config) { |
| if (max_id < children) { |
| for (c = max_id; c < children; c++) |
| nvlist_free(child[c]); |
| children = max_id; |
| } else if (max_id > children) { |
| nvlist_t **newchild; |
| |
| newchild = zfs_alloc(hdl, (max_id) * |
| sizeof (nvlist_t *)); |
| if (newchild == NULL) |
| goto nomem; |
| |
| for (c = 0; c < children; c++) |
| newchild[c] = child[c]; |
| |
| free(child); |
| child = newchild; |
| children = max_id; |
| } |
| } |
| |
| verify(nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID, |
| &guid) == 0); |
| |
| /* |
| * The vdev namespace may contain holes as a result of |
| * device removal. We must add them back into the vdev |
| * tree before we process any missing devices. |
| */ |
| if (holes > 0) { |
| ASSERT(valid_top_config); |
| |
| for (c = 0; c < children; c++) { |
| nvlist_t *holey; |
| |
| if (child[c] != NULL || |
| !vdev_is_hole(hole_array, holes, c)) |
| continue; |
| |
| if (nvlist_alloc(&holey, NV_UNIQUE_NAME, |
| 0) != 0) |
| goto nomem; |
| |
| /* |
| * Holes in the namespace are treated as |
| * "hole" top-level vdevs and have a |
| * special flag set on them. |
| */ |
| if (nvlist_add_string(holey, |
| ZPOOL_CONFIG_TYPE, |
| VDEV_TYPE_HOLE) != 0 || |
| nvlist_add_uint64(holey, |
| ZPOOL_CONFIG_ID, c) != 0 || |
| nvlist_add_uint64(holey, |
| ZPOOL_CONFIG_GUID, 0ULL) != 0) { |
| nvlist_free(holey); |
| goto nomem; |
| } |
| child[c] = holey; |
| } |
| } |
| |
| /* |
| * Look for any missing top-level vdevs. If this is the case, |
| * create a faked up 'missing' vdev as a placeholder. We cannot |
| * simply compress the child array, because the kernel performs |
| * certain checks to make sure the vdev IDs match their location |
| * in the configuration. |
| */ |
| for (c = 0; c < children; c++) { |
| if (child[c] == NULL) { |
| nvlist_t *missing; |
| if (nvlist_alloc(&missing, NV_UNIQUE_NAME, |
| 0) != 0) |
| goto nomem; |
| if (nvlist_add_string(missing, |
| ZPOOL_CONFIG_TYPE, |
| VDEV_TYPE_MISSING) != 0 || |
| nvlist_add_uint64(missing, |
| ZPOOL_CONFIG_ID, c) != 0 || |
| nvlist_add_uint64(missing, |
| ZPOOL_CONFIG_GUID, 0ULL) != 0) { |
| nvlist_free(missing); |
| goto nomem; |
| } |
| child[c] = missing; |
| } |
| } |
| |
| /* |
| * Put all of this pool's top-level vdevs into a root vdev. |
| */ |
| if (nvlist_alloc(&nvroot, NV_UNIQUE_NAME, 0) != 0) |
| goto nomem; |
| if (nvlist_add_string(nvroot, ZPOOL_CONFIG_TYPE, |
| VDEV_TYPE_ROOT) != 0 || |
| nvlist_add_uint64(nvroot, ZPOOL_CONFIG_ID, 0ULL) != 0 || |
| nvlist_add_uint64(nvroot, ZPOOL_CONFIG_GUID, guid) != 0 || |
| nvlist_add_nvlist_array(nvroot, ZPOOL_CONFIG_CHILDREN, |
| child, children) != 0) { |
| nvlist_free(nvroot); |
| goto nomem; |
| } |
| |
| for (c = 0; c < children; c++) |
| nvlist_free(child[c]); |
| free(child); |
| children = 0; |
| child = NULL; |
| |
| /* |
| * Go through and fix up any paths and/or devids based on our |
| * known list of vdev GUID -> path mappings. |
| */ |
| if (fix_paths(hdl, nvroot, pl->names) != 0) { |
| nvlist_free(nvroot); |
| goto nomem; |
| } |
| |
| /* |
| * Add the root vdev to this pool's configuration. |
| */ |
| if (nvlist_add_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, |
| nvroot) != 0) { |
| nvlist_free(nvroot); |
| goto nomem; |
| } |
| nvlist_free(nvroot); |
| |
| /* |
| * zdb uses this path to report on active pools that were |
| * imported or created using -R. |
| */ |
| if (active_ok) |
| goto add_pool; |
| |
| /* |
| * Determine if this pool is currently active, in which case we |
| * can't actually import it. |
| */ |
| verify(nvlist_lookup_string(config, ZPOOL_CONFIG_POOL_NAME, |
| &name) == 0); |
| verify(nvlist_lookup_uint64(config, ZPOOL_CONFIG_POOL_GUID, |
| &guid) == 0); |
| |
| if (pool_active(hdl, name, guid, &isactive) != 0) |
| goto error; |
| |
| if (isactive) { |
| nvlist_free(config); |
| config = NULL; |
| continue; |
| } |
| |
| if (policy != NULL) { |
| if (nvlist_add_nvlist(config, ZPOOL_LOAD_POLICY, |
| policy) != 0) |
| goto nomem; |
| } |
| |
| if ((nvl = refresh_config(hdl, config)) == NULL) { |
| nvlist_free(config); |
| config = NULL; |
| continue; |
| } |
| |
| nvlist_free(config); |
| config = nvl; |
| |
| /* |
| * Go through and update the paths for spares, now that we have |
| * them. |
| */ |
| verify(nvlist_lookup_nvlist(config, ZPOOL_CONFIG_VDEV_TREE, |
| &nvroot) == 0); |
| if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_SPARES, |
| &spares, &nspares) == 0) { |
| for (i = 0; i < nspares; i++) { |
| if (fix_paths(hdl, spares[i], pl->names) != 0) |
| goto nomem; |
| } |
| } |
| |
| /* |
| * Update the paths for l2cache devices. |
| */ |
| if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_L2CACHE, |
| &l2cache, &nl2cache) == 0) { |
| for (i = 0; i < nl2cache; i++) { |
| if (fix_paths(hdl, l2cache[i], pl->names) != 0) |
| goto nomem; |
| } |
| } |
| |
| /* |
| * Restore the original information read from the actual label. |
| */ |
| (void) nvlist_remove(config, ZPOOL_CONFIG_HOSTID, |
| DATA_TYPE_UINT64); |
| (void) nvlist_remove(config, ZPOOL_CONFIG_HOSTNAME, |
| DATA_TYPE_STRING); |
| if (hostid != 0) { |
| verify(nvlist_add_uint64(config, ZPOOL_CONFIG_HOSTID, |
| hostid) == 0); |
| verify(nvlist_add_string(config, ZPOOL_CONFIG_HOSTNAME, |
| hostname) == 0); |
| } |
| |
| add_pool: |
| /* |
| * Add this pool to the list of configs. |
| */ |
| verify(nvlist_lookup_string(config, ZPOOL_CONFIG_POOL_NAME, |
| &name) == 0); |
| |
| if (nvlist_add_nvlist(ret, name, config) != 0) |
| goto nomem; |
| |
| nvlist_free(config); |
| config = NULL; |
| } |
| |
| return (ret); |
| |
| nomem: |
| (void) no_memory(hdl); |
| error: |
| nvlist_free(config); |
| nvlist_free(ret); |
| for (c = 0; c < children; c++) |
| nvlist_free(child[c]); |
| free(child); |
| |
| return (NULL); |
| } |
| |
| /* |
| * Return the offset of the given label. |
| */ |
| static uint64_t |
| label_offset(uint64_t size, int l) |
| { |
| ASSERT(P2PHASE_TYPED(size, sizeof (vdev_label_t), uint64_t) == 0); |
| return (l * sizeof (vdev_label_t) + (l < VDEV_LABELS / 2 ? |
| 0 : size - VDEV_LABELS * sizeof (vdev_label_t))); |
| } |
| |
| /* |
| * Given a file descriptor, read the label information and return an nvlist |
| * describing the configuration, if there is one. The number of valid |
| * labels found will be returned in num_labels when non-NULL. |
| */ |
| int |
| zpool_read_label(int fd, nvlist_t **config, int *num_labels) |
| { |
| struct stat64 statbuf; |
| int l, count = 0; |
| vdev_label_t *label; |
| nvlist_t *expected_config = NULL; |
| uint64_t expected_guid = 0, size; |
| int error; |
| |
| *config = NULL; |
| |
| if (fstat64_blk(fd, &statbuf) == -1) |
| return (0); |
| size = P2ALIGN_TYPED(statbuf.st_size, sizeof (vdev_label_t), uint64_t); |
| |
| error = posix_memalign((void **)&label, PAGESIZE, sizeof (*label)); |
| if (error) |
| return (-1); |
| |
| for (l = 0; l < VDEV_LABELS; l++) { |
| uint64_t state, guid, txg; |
| |
| if (pread64(fd, label, sizeof (vdev_label_t), |
| label_offset(size, l)) != sizeof (vdev_label_t)) |
| continue; |
| |
| if (nvlist_unpack(label->vl_vdev_phys.vp_nvlist, |
| sizeof (label->vl_vdev_phys.vp_nvlist), config, 0) != 0) |
| continue; |
| |
| if (nvlist_lookup_uint64(*config, ZPOOL_CONFIG_GUID, |
| &guid) != 0 || guid == 0) { |
| nvlist_free(*config); |
| continue; |
| } |
| |
| if (nvlist_lookup_uint64(*config, ZPOOL_CONFIG_POOL_STATE, |
| &state) != 0 || state > POOL_STATE_L2CACHE) { |
| nvlist_free(*config); |
| continue; |
| } |
| |
| if (state != POOL_STATE_SPARE && state != POOL_STATE_L2CACHE && |
| (nvlist_lookup_uint64(*config, ZPOOL_CONFIG_POOL_TXG, |
| &txg) != 0 || txg == 0)) { |
| nvlist_free(*config); |
| continue; |
| } |
| |
| if (expected_guid) { |
| if (expected_guid == guid) |
| count++; |
| |
| nvlist_free(*config); |
| } else { |
| expected_config = *config; |
| expected_guid = guid; |
| count++; |
| } |
| } |
| |
| if (num_labels != NULL) |
| *num_labels = count; |
| |
| free(label); |
| *config = expected_config; |
| |
| return (0); |
| } |
| |
| typedef struct rdsk_node { |
| char *rn_name; /* Full path to device */ |
| int rn_order; /* Preferred order (low to high) */ |
| int rn_num_labels; /* Number of valid labels */ |
| uint64_t rn_vdev_guid; /* Expected vdev guid when set */ |
| libpc_handle_t *rn_hdl; |
| nvlist_t *rn_config; /* Label config */ |
| avl_tree_t *rn_avl; |
| avl_node_t rn_node; |
| pthread_mutex_t *rn_lock; |
| boolean_t rn_labelpaths; |
| } rdsk_node_t; |
| |
| /* |
| * Sorted by full path and then vdev guid to allow for multiple entries with |
| * the same full path name. This is required because it's possible to |
| * have multiple block devices with labels that refer to the same |
| * ZPOOL_CONFIG_PATH yet have different vdev guids. In this case both |
| * entries need to be added to the cache. Scenarios where this can occur |
| * include overwritten pool labels, devices which are visible from multiple |
| * hosts and multipath devices. |
| */ |
| static int |
| slice_cache_compare(const void *arg1, const void *arg2) |
| { |
| const char *nm1 = ((rdsk_node_t *)arg1)->rn_name; |
| const char *nm2 = ((rdsk_node_t *)arg2)->rn_name; |
| uint64_t guid1 = ((rdsk_node_t *)arg1)->rn_vdev_guid; |
| uint64_t guid2 = ((rdsk_node_t *)arg2)->rn_vdev_guid; |
| int rv; |
| |
| rv = AVL_ISIGN(strcmp(nm1, nm2)); |
| if (rv) |
| return (rv); |
| |
| return (AVL_CMP(guid1, guid2)); |
| } |
| |
| static boolean_t |
| is_watchdog_dev(char *dev) |
| { |
| /* For 'watchdog' dev */ |
| if (strcmp(dev, "watchdog") == 0) |
| return (B_TRUE); |
| |
| /* For 'watchdog<digit><whatever> */ |
| if (strstr(dev, "watchdog") == dev && isdigit(dev[8])) |
| return (B_TRUE); |
| |
| return (B_FALSE); |
| } |
| |
| static int |
| label_paths_impl(libpc_handle_t *hdl, nvlist_t *nvroot, uint64_t pool_guid, |
| uint64_t vdev_guid, char **path, char **devid) |
| { |
| nvlist_t **child; |
| uint_t c, children; |
| uint64_t guid; |
| char *val; |
| int error; |
| |
| if (nvlist_lookup_nvlist_array(nvroot, ZPOOL_CONFIG_CHILDREN, |
| &child, &children) == 0) { |
| for (c = 0; c < children; c++) { |
| error = label_paths_impl(hdl, child[c], |
| pool_guid, vdev_guid, path, devid); |
| if (error) |
| return (error); |
| } |
| return (0); |
| } |
| |
| if (nvroot == NULL) |
| return (0); |
| |
| error = nvlist_lookup_uint64(nvroot, ZPOOL_CONFIG_GUID, &guid); |
| if ((error != 0) || (guid != vdev_guid)) |
| return (0); |
| |
| error = nvlist_lookup_string(nvroot, ZPOOL_CONFIG_PATH, &val); |
| if (error == 0) |
| *path = val; |
| |
| error = nvlist_lookup_string(nvroot, ZPOOL_CONFIG_DEVID, &val); |
| if (error == 0) |
| *devid = val; |
| |
| return (0); |
| } |
| |
| /* |
| * Given a disk label fetch the ZPOOL_CONFIG_PATH and ZPOOL_CONFIG_DEVID |
| * and store these strings as config_path and devid_path respectively. |
| * The returned pointers are only valid as long as label remains valid. |
| */ |
| static int |
| label_paths(libpc_handle_t *hdl, nvlist_t *label, char **path, char **devid) |
| { |
| nvlist_t *nvroot; |
| uint64_t pool_guid; |
| uint64_t vdev_guid; |
| |
| *path = NULL; |
| *devid = NULL; |
| |
| if (nvlist_lookup_nvlist(label, ZPOOL_CONFIG_VDEV_TREE, &nvroot) || |
| nvlist_lookup_uint64(label, ZPOOL_CONFIG_POOL_GUID, &pool_guid) || |
| nvlist_lookup_uint64(label, ZPOOL_CONFIG_GUID, &vdev_guid)) |
| return (ENOENT); |
| |
| return (label_paths_impl(hdl, nvroot, pool_guid, vdev_guid, path, |
| devid)); |
| } |
| |
| static void |
| zpool_open_func(void *arg) |
| { |
| rdsk_node_t *rn = arg; |
| libpc_handle_t *hdl = rn->rn_hdl; |
| struct stat64 statbuf; |
| nvlist_t *config; |
| char *bname, *dupname; |
| uint64_t vdev_guid = 0; |
| int error; |
| int num_labels = 0; |
| int fd; |
| |
| /* |
| * Skip devices with well known prefixes there can be side effects |
| * when opening devices which need to be avoided. |
| * |
| * hpet - High Precision Event Timer |
| * watchdog - Watchdog must be closed in a special way. |
| */ |
| dupname = zfs_strdup(hdl, rn->rn_name); |
| bname = basename(dupname); |
| error = ((strcmp(bname, "hpet") == 0) || is_watchdog_dev(bname)); |
| free(dupname); |
| if (error) |
| return; |
| |
| /* |
| * Ignore failed stats. We only want regular files and block devices. |
| */ |
| if (stat64(rn->rn_name, &statbuf) != 0 || |
| (!S_ISREG(statbuf.st_mode) && !S_ISBLK(statbuf.st_mode))) |
| return; |
| |
| /* |
| * Preferentially open using O_DIRECT to bypass the block device |
| * cache which may be stale for multipath devices. An EINVAL errno |
| * indicates O_DIRECT is unsupported so fallback to just O_RDONLY. |
| */ |
| fd = open(rn->rn_name, O_RDONLY | O_DIRECT); |
| if ((fd < 0) && (errno == EINVAL)) |
| fd = open(rn->rn_name, O_RDONLY); |
| |
| if ((fd < 0) && (errno == EACCES)) |
| hdl->lpc_open_access_error = B_TRUE; |
| |
| if (fd < 0) |
| return; |
| |
| /* |
| * This file is too small to hold a zpool |
| */ |
| if (S_ISREG(statbuf.st_mode) && statbuf.st_size < SPA_MINDEVSIZE) { |
| (void) close(fd); |
| return; |
| } |
| |
| error = zpool_read_label(fd, &config, &num_labels); |
| if (error != 0) { |
| (void) close(fd); |
| return; |
| } |
| |
| if (num_labels == 0) { |
| (void) close(fd); |
| nvlist_free(config); |
| return; |
| } |
| |
| /* |
| * Check that the vdev is for the expected guid. Additional entries |
| * are speculatively added based on the paths stored in the labels. |
| * Entries with valid paths but incorrect guids must be removed. |
| */ |
| error = nvlist_lookup_uint64(config, ZPOOL_CONFIG_GUID, &vdev_guid); |
| if (error || (rn->rn_vdev_guid && rn->rn_vdev_guid != vdev_guid)) { |
| (void) close(fd); |
| nvlist_free(config); |
| return; |
| } |
| |
| (void) close(fd); |
| |
| rn->rn_config = config; |
| rn->rn_num_labels = num_labels; |
| |
| /* |
| * Add additional entries for paths described by this label. |
| */ |
| if (rn->rn_labelpaths) { |
| char *path = NULL; |
| char *devid = NULL; |
| char *env = NULL; |
| rdsk_node_t *slice; |
| avl_index_t where; |
| int timeout; |
| int error; |
| |
| if (label_paths(rn->rn_hdl, rn->rn_config, &path, &devid)) |
| return; |
| |
| env = getenv("ZPOOL_IMPORT_UDEV_TIMEOUT_MS"); |
| if ((env == NULL) || sscanf(env, "%d", &timeout) != 1 || |
| timeout < 0) { |
| timeout = DISK_LABEL_WAIT; |
| } |
| |
| /* |
| * Allow devlinks to stabilize so all paths are available. |
| */ |
| zpool_label_disk_wait(rn->rn_name, timeout); |
| |
| if (path != NULL) { |
| slice = zfs_alloc(hdl, sizeof (rdsk_node_t)); |
| slice->rn_name = zfs_strdup(hdl, path); |
| slice->rn_vdev_guid = vdev_guid; |
| slice->rn_avl = rn->rn_avl; |
| slice->rn_hdl = hdl; |
| slice->rn_order = IMPORT_ORDER_PREFERRED_1; |
| slice->rn_labelpaths = B_FALSE; |
| pthread_mutex_lock(rn->rn_lock); |
| if (avl_find(rn->rn_avl, slice, &where)) { |
| pthread_mutex_unlock(rn->rn_lock); |
| free(slice->rn_name); |
| free(slice); |
| } else { |
| avl_insert(rn->rn_avl, slice, where); |
| pthread_mutex_unlock(rn->rn_lock); |
| zpool_open_func(slice); |
| } |
| } |
| |
| if (devid != NULL) { |
| slice = zfs_alloc(hdl, sizeof (rdsk_node_t)); |
| error = asprintf(&slice->rn_name, "%s%s", |
| DEV_BYID_PATH, devid); |
| if (error == -1) { |
| free(slice); |
| return; |
| } |
| |
| slice->rn_vdev_guid = vdev_guid; |
| slice->rn_avl = rn->rn_avl; |
| slice->rn_hdl = hdl; |
| slice->rn_order = IMPORT_ORDER_PREFERRED_2; |
| slice->rn_labelpaths = B_FALSE; |
| pthread_mutex_lock(rn->rn_lock); |
| if (avl_find(rn->rn_avl, slice, &where)) { |
| pthread_mutex_unlock(rn->rn_lock); |
| free(slice->rn_name); |
| free(slice); |
| } else { |
| avl_insert(rn->rn_avl, slice, where); |
| pthread_mutex_unlock(rn->rn_lock); |
| zpool_open_func(slice); |
| } |
| } |
| } |
| } |
| |
| static void |
| zpool_find_import_scan_add_slice(libpc_handle_t *hdl, pthread_mutex_t *lock, |
| avl_tree_t *cache, const char *path, const char *name, int order) |
| { |
| avl_index_t where; |
| rdsk_node_t *slice; |
| |
| slice = zfs_alloc(hdl, sizeof (rdsk_node_t)); |
| if (asprintf(&slice->rn_name, "%s/%s", path, name) == -1) { |
| free(slice); |
| return; |
| } |
| slice->rn_vdev_guid = 0; |
| slice->rn_lock = lock; |
| slice->rn_avl = cache; |
| slice->rn_hdl = hdl; |
| slice->rn_order = order + IMPORT_ORDER_SCAN_OFFSET; |
| slice->rn_labelpaths = B_FALSE; |
| |
| pthread_mutex_lock(lock); |
| if (avl_find(cache, slice, &where)) { |
| free(slice->rn_name); |
| free(slice); |
| } else { |
| avl_insert(cache, slice, where); |
| } |
| pthread_mutex_unlock(lock); |
| } |
| |
| static int |
| zpool_find_import_scan_dir(libpc_handle_t *hdl, pthread_mutex_t *lock, |
| avl_tree_t *cache, const char *dir, int order) |
| { |
| int error; |
| char path[MAXPATHLEN]; |
| struct dirent64 *dp; |
| DIR *dirp; |
| |
| if (realpath(dir, path) == NULL) { |
| error = errno; |
| if (error == ENOENT) |
| return (0); |
| |
| zfs_error_aux(hdl, strerror(error)); |
| (void) zfs_error_fmt(hdl, EZFS_BADPATH, dgettext( |
| TEXT_DOMAIN, "cannot resolve path '%s'"), dir); |
| return (error); |
| } |
| |
| dirp = opendir(path); |
| if (dirp == NULL) { |
| error = errno; |
| zfs_error_aux(hdl, strerror(error)); |
| (void) zfs_error_fmt(hdl, EZFS_BADPATH, |
| dgettext(TEXT_DOMAIN, "cannot open '%s'"), path); |
| return (error); |
| } |
| |
| while ((dp = readdir64(dirp)) != NULL) { |
| const char *name = dp->d_name; |
| if (name[0] == '.' && |
| (name[1] == 0 || (name[1] == '.' && name[2] == 0))) |
| continue; |
| |
| zpool_find_import_scan_add_slice(hdl, lock, cache, path, name, |
| order); |
| } |
| |
| (void) closedir(dirp); |
| return (0); |
| } |
| |
| static int |
| zpool_find_import_scan_path(libpc_handle_t *hdl, pthread_mutex_t *lock, |
| avl_tree_t *cache, const char *dir, int order) |
| { |
| int error = 0; |
| char path[MAXPATHLEN]; |
| char *d, *b; |
| char *dpath, *name; |
| |
| /* |
| * Separate the directory part and last part of the |
| * path. We do this so that we can get the realpath of |
| * the directory. We don't get the realpath on the |
| * whole path because if it's a symlink, we want the |
| * path of the symlink not where it points to. |
| */ |
| d = zfs_strdup(hdl, dir); |
| b = zfs_strdup(hdl, dir); |
| dpath = dirname(d); |
| name = basename(b); |
| |
| if (realpath(dpath, path) == NULL) { |
| error = errno; |
| if (error == ENOENT) { |
| error = 0; |
| goto out; |
| } |
| |
| zfs_error_aux(hdl, strerror(error)); |
| (void) zfs_error_fmt(hdl, EZFS_BADPATH, dgettext( |
| TEXT_DOMAIN, "cannot resolve path '%s'"), dir); |
| goto out; |
| } |
| |
| zpool_find_import_scan_add_slice(hdl, lock, cache, path, name, order); |
| |
| out: |
| free(b); |
| free(d); |
| return (error); |
| } |
| |
| /* |
| * Scan a list of directories for zfs devices. |
| */ |
| static int |
| zpool_find_import_scan(libpc_handle_t *hdl, pthread_mutex_t *lock, |
| avl_tree_t **slice_cache, char **dir, int dirs) |
| { |
| avl_tree_t *cache; |
| rdsk_node_t *slice; |
| void *cookie; |
| int i, error; |
| |
| *slice_cache = NULL; |
| cache = zfs_alloc(hdl, sizeof (avl_tree_t)); |
| avl_create(cache, slice_cache_compare, sizeof (rdsk_node_t), |
| offsetof(rdsk_node_t, rn_node)); |
| |
| for (i = 0; i < dirs; i++) { |
| struct stat sbuf; |
| |
| if (stat(dir[i], &sbuf) != 0) { |
| error = errno; |
| if (error == ENOENT) |
| continue; |
| |
| zfs_error_aux(hdl, strerror(error)); |
| (void) zfs_error_fmt(hdl, EZFS_BADPATH, dgettext( |
| TEXT_DOMAIN, "cannot resolve path '%s'"), dir[i]); |
| goto error; |
| } |
| |
| /* |
| * If dir[i] is a directory, we walk through it and add all |
| * the entry to the cache. If it's not a directory, we just |
| * add it to the cache. |
| */ |
| if (S_ISDIR(sbuf.st_mode)) { |
| if ((error = zpool_find_import_scan_dir(hdl, lock, |
| cache, dir[i], i)) != 0) |
| goto error; |
| } else { |
| if ((error = zpool_find_import_scan_path(hdl, lock, |
| cache, dir[i], i)) != 0) |
| goto error; |
| } |
| } |
| |
| *slice_cache = cache; |
| return (0); |
| |
| error: |
| cookie = NULL; |
| while ((slice = avl_destroy_nodes(cache, &cookie)) != NULL) { |
| free(slice->rn_name); |
| free(slice); |
| } |
| free(cache); |
| |
| return (error); |
| } |
| |
| static char * |
| zpool_default_import_path[DEFAULT_IMPORT_PATH_SIZE] = { |
| "/dev/disk/by-vdev", /* Custom rules, use first if they exist */ |
| "/dev/mapper", /* Use multipath devices before components */ |
| "/dev/disk/by-partlabel", /* Single unique entry set by user */ |
| "/dev/disk/by-partuuid", /* Generated partition uuid */ |
| "/dev/disk/by-label", /* Custom persistent labels */ |
| "/dev/disk/by-uuid", /* Single unique entry and persistent */ |
| "/dev/disk/by-id", /* May be multiple entries and persistent */ |
| "/dev/disk/by-path", /* Encodes physical location and persistent */ |
| "/dev" /* UNSAFE device names will change */ |
| }; |
| |
| const char * const * |
| zpool_default_search_paths(size_t *count) |
| { |
| *count = DEFAULT_IMPORT_PATH_SIZE; |
| return ((const char * const *)zpool_default_import_path); |
| } |
| |
| /* |
| * Given a full path to a device determine if that device appears in the |
| * import search path. If it does return the first match and store the |
| * index in the passed 'order' variable, otherwise return an error. |
| */ |
| static int |
| zfs_path_order(char *name, int *order) |
| { |
| int i = 0, error = ENOENT; |
| char *dir, *env, *envdup; |
| |
| env = getenv("ZPOOL_IMPORT_PATH"); |
| if (env) { |
| envdup = strdup(env); |
| dir = strtok(envdup, ":"); |
| while (dir) { |
| if (strncmp(name, dir, strlen(dir)) == 0) { |
| *order = i; |
| error = 0; |
| break; |
| } |
| dir = strtok(NULL, ":"); |
| i++; |
| } |
| free(envdup); |
| } else { |
| for (i = 0; i < DEFAULT_IMPORT_PATH_SIZE; i++) { |
| if (strncmp(name, zpool_default_import_path[i], |
| strlen(zpool_default_import_path[i])) == 0) { |
| *order = i; |
| error = 0; |
| break; |
| } |
| } |
| } |
| |
| return (error); |
| } |
| |
| /* |
| * Use libblkid to quickly enumerate all known zfs devices. |
| */ |
| static int |
| zpool_find_import_blkid(libpc_handle_t *hdl, pthread_mutex_t *lock, |
| avl_tree_t **slice_cache) |
| { |
| rdsk_node_t *slice; |
| blkid_cache cache; |
| blkid_dev_iterate iter; |
| blkid_dev dev; |
| avl_index_t where; |
| int error; |
| |
| *slice_cache = NULL; |
| |
| error = blkid_get_cache(&cache, NULL); |
| if (error != 0) |
| return (error); |
| |
| error = blkid_probe_all_new(cache); |
| if (error != 0) { |
| blkid_put_cache(cache); |
| return (error); |
| } |
| |
| iter = blkid_dev_iterate_begin(cache); |
| if (iter == NULL) { |
| blkid_put_cache(cache); |
| return (EINVAL); |
| } |
| |
| error = blkid_dev_set_search(iter, "TYPE", "zfs_member"); |
| if (error != 0) { |
| blkid_dev_iterate_end(iter); |
| blkid_put_cache(cache); |
| return (error); |
| } |
| |
| *slice_cache = zfs_alloc(hdl, sizeof (avl_tree_t)); |
| avl_create(*slice_cache, slice_cache_compare, sizeof (rdsk_node_t), |
| offsetof(rdsk_node_t, rn_node)); |
| |
| while (blkid_dev_next(iter, &dev) == 0) { |
| slice = zfs_alloc(hdl, sizeof (rdsk_node_t)); |
| slice->rn_name = zfs_strdup(hdl, blkid_dev_devname(dev)); |
| slice->rn_vdev_guid = 0; |
| slice->rn_lock = lock; |
| slice->rn_avl = *slice_cache; |
| slice->rn_hdl = hdl; |
| slice->rn_labelpaths = B_TRUE; |
| |
| error = zfs_path_order(slice->rn_name, &slice->rn_order); |
| if (error == 0) |
| slice->rn_order += IMPORT_ORDER_SCAN_OFFSET; |
| else |
| slice->rn_order = IMPORT_ORDER_DEFAULT; |
| |
| pthread_mutex_lock(lock); |
| if (avl_find(*slice_cache, slice, &where)) { |
| free(slice->rn_name); |
| free(slice); |
| } else { |
| avl_insert(*slice_cache, slice, where); |
| } |
| pthread_mutex_unlock(lock); |
| } |
| |
| blkid_dev_iterate_end(iter); |
| blkid_put_cache(cache); |
| |
| return (0); |
| } |
| |
| /* |
| * Given a list of directories to search, find all pools stored on disk. This |
| * includes partial pools which are not available to import. If no args are |
| * given (argc is 0), then the default directory (/dev/dsk) is searched. |
| * poolname or guid (but not both) are provided by the caller when trying |
| * to import a specific pool. |
| */ |
| static nvlist_t * |
| zpool_find_import_impl(libpc_handle_t *hdl, importargs_t *iarg) |
| { |
| nvlist_t *ret = NULL; |
| pool_list_t pools = { 0 }; |
| pool_entry_t *pe, *penext; |
| vdev_entry_t *ve, *venext; |
| config_entry_t *ce, *cenext; |
| name_entry_t *ne, *nenext; |
| pthread_mutex_t lock; |
| avl_tree_t *cache; |
| rdsk_node_t *slice; |
| void *cookie; |
| tpool_t *t; |
| |
| verify(iarg->poolname == NULL || iarg->guid == 0); |
| pthread_mutex_init(&lock, NULL); |
| |
| /* |
| * Locate pool member vdevs using libblkid or by directory scanning. |
| * On success a newly allocated AVL tree which is populated with an |
| * entry for each discovered vdev will be returned as the cache. |
| * It's the callers responsibility to consume and destroy this tree. |
| */ |
| if (iarg->scan || iarg->paths != 0) { |
| int dirs = iarg->paths; |
| char **dir = iarg->path; |
| |
| if (dirs == 0) { |
| dir = zpool_default_import_path; |
| dirs = DEFAULT_IMPORT_PATH_SIZE; |
| } |
| |
| if (zpool_find_import_scan(hdl, &lock, &cache, dir, dirs) != 0) |
| return (NULL); |
| } else { |
| if (zpool_find_import_blkid(hdl, &lock, &cache) != 0) |
| return (NULL); |
| } |
| |
| /* |
| * Create a thread pool to parallelize the process of reading and |
| * validating labels, a large number of threads can be used due to |
| * minimal contention. |
| */ |
| t = tpool_create(1, 2 * sysconf(_SC_NPROCESSORS_ONLN), 0, NULL); |
| for (slice = avl_first(cache); slice; |
| (slice = avl_walk(cache, slice, AVL_AFTER))) |
| (void) tpool_dispatch(t, zpool_open_func, slice); |
| |
| tpool_wait(t); |
| tpool_destroy(t); |
| |
| /* |
| * Process the cache, filtering out any entries which are not |
| * for the specified pool then adding matching label configs. |
| */ |
| cookie = NULL; |
| while ((slice = avl_destroy_nodes(cache, &cookie)) != NULL) { |
| if (slice->rn_config != NULL) { |
| nvlist_t *config = slice->rn_config; |
| boolean_t matched = B_TRUE; |
| boolean_t aux = B_FALSE; |
| int fd; |
| |
| /* |
| * Check if it's a spare or l2cache device. If it is, |
| * we need to skip the name and guid check since they |
| * don't exist on aux device label. |
| */ |
| if (iarg->poolname != NULL || iarg->guid != 0) { |
| uint64_t state; |
| aux = nvlist_lookup_uint64(config, |
| ZPOOL_CONFIG_POOL_STATE, &state) == 0 && |
| (state == POOL_STATE_SPARE || |
| state == POOL_STATE_L2CACHE); |
| } |
| |
| if (iarg->poolname != NULL && !aux) { |
| char *pname; |
| |
| matched = nvlist_lookup_string(config, |
| ZPOOL_CONFIG_POOL_NAME, &pname) == 0 && |
| strcmp(iarg->poolname, pname) == 0; |
| } else if (iarg->guid != 0 && !aux) { |
| uint64_t this_guid; |
| |
| matched = nvlist_lookup_uint64(config, |
| ZPOOL_CONFIG_POOL_GUID, &this_guid) == 0 && |
| iarg->guid == this_guid; |
| } |
| if (matched) { |
| /* |
| * Verify all remaining entries can be opened |
| * exclusively. This will prune all underlying |
| * multipath devices which otherwise could |
| * result in the vdev appearing as UNAVAIL. |
| * |
| * Under zdb, this step isn't required and |
| * would prevent a zdb -e of active pools with |
| * no cachefile. |
| */ |
| fd = open(slice->rn_name, O_RDONLY | O_EXCL); |
| if (fd >= 0 || iarg->can_be_active) { |
| if (fd >= 0) |
| close(fd); |
| add_config(hdl, &pools, |
| slice->rn_name, slice->rn_order, |
| slice->rn_num_labels, config); |
| } |
| } |
| nvlist_free(config); |
| } |
| free(slice->rn_name); |
| free(slice); |
| } |
| avl_destroy(cache); |
| free(cache); |
| pthread_mutex_destroy(&lock); |
| |
| ret = get_configs(hdl, &pools, iarg->can_be_active, iarg->policy); |
| |
| for (pe = pools.pools; pe != NULL; pe = penext) { |
| penext = pe->pe_next; |
| for (ve = pe->pe_vdevs; ve != NULL; ve = venext) { |
| venext = ve->ve_next; |
| for (ce = ve->ve_configs; ce != NULL; ce = cenext) { |
| cenext = ce->ce_next; |
| nvlist_free(ce->ce_config); |
| free(ce); |
| } |
| free(ve); |
| } |
| free(pe); |
| } |
| |
| for (ne = pools.names; ne != NULL; ne = nenext) { |
| nenext = ne->ne_next; |
| free(ne->ne_name); |
| free(ne); |
| } |
| |
| return (ret); |
| } |
| |
| /* |
| * Given a cache file, return the contents as a list of importable pools. |
| * poolname or guid (but not both) are provided by the caller when trying |
| * to import a specific pool. |
| */ |
| static nvlist_t * |
| zpool_find_import_cached(libpc_handle_t *hdl, const char *cachefile, |
| const char *poolname, uint64_t guid) |
| { |
| char *buf; |
| int fd; |
| struct stat64 statbuf; |
| nvlist_t *raw, *src, *dst; |
| nvlist_t *pools; |
| nvpair_t *elem; |
| char *name; |
| uint64_t this_guid; |
| boolean_t active; |
| |
| verify(poolname == NULL || guid == 0); |
| |
| if ((fd = open(cachefile, O_RDONLY)) < 0) { |
| zfs_error_aux(hdl, "%s", strerror(errno)); |
| (void) zfs_error(hdl, EZFS_BADCACHE, |
| dgettext(TEXT_DOMAIN, "failed to open cache file")); |
| return (NULL); |
| } |
| |
| if (fstat64(fd, &statbuf) != 0) { |
| zfs_error_aux(hdl, "%s", strerror(errno)); |
| (void) close(fd); |
| (void) zfs_error(hdl, EZFS_BADCACHE, |
| dgettext(TEXT_DOMAIN, "failed to get size of cache file")); |
| return (NULL); |
| } |
| |
| if ((buf = zfs_alloc(hdl, statbuf.st_size)) == NULL) { |
| (void) close(fd); |
| return (NULL); |
| } |
| |
| if (read(fd, buf, statbuf.st_size) != statbuf.st_size) { |
| (void) close(fd); |
| free(buf); |
| (void) zfs_error(hdl, EZFS_BADCACHE, |
| dgettext(TEXT_DOMAIN, |
| "failed to read cache file contents")); |
| return (NULL); |
| } |
| |
| (void) close(fd); |
| |
| if (nvlist_unpack(buf, statbuf.st_size, &raw, 0) != 0) { |
| free(buf); |
| (void) zfs_error(hdl, EZFS_BADCACHE, |
| dgettext(TEXT_DOMAIN, |
| "invalid or corrupt cache file contents")); |
| return (NULL); |
| } |
| |
| free(buf); |
| |
| /* |
| * Go through and get the current state of the pools and refresh their |
| * state. |
| */ |
| if (nvlist_alloc(&pools, 0, 0) != 0) { |
| (void) no_memory(hdl); |
| nvlist_free(raw); |
| return (NULL); |
| } |
| |
| elem = NULL; |
| while ((elem = nvlist_next_nvpair(raw, elem)) != NULL) { |
| src = fnvpair_value_nvlist(elem); |
| |
| name = fnvlist_lookup_string(src, ZPOOL_CONFIG_POOL_NAME); |
| if (poolname != NULL && strcmp(poolname, name) != 0) |
| continue; |
| |
| this_guid = fnvlist_lookup_uint64(src, ZPOOL_CONFIG_POOL_GUID); |
| if (guid != 0 && guid != this_guid) |
| continue; |
| |
| if (pool_active(hdl, name, this_guid, &active) != 0) { |
| nvlist_free(raw); |
| nvlist_free(pools); |
| return (NULL); |
| } |
| |
| if (active) |
| continue; |
| |
| if (nvlist_add_string(src, ZPOOL_CONFIG_CACHEFILE, |
| cachefile) != 0) { |
| (void) no_memory(hdl); |
| nvlist_free(raw); |
| nvlist_free(pools); |
| return (NULL); |
| } |
| |
| if ((dst = refresh_config(hdl, src)) == NULL) { |
| nvlist_free(raw); |
| nvlist_free(pools); |
| return (NULL); |
| } |
| |
| if (nvlist_add_nvlist(pools, nvpair_name(elem), dst) != 0) { |
| (void) no_memory(hdl); |
| nvlist_free(dst); |
| nvlist_free(raw); |
| nvlist_free(pools); |
| return (NULL); |
| } |
| nvlist_free(dst); |
| } |
| |
| nvlist_free(raw); |
| return (pools); |
| } |
| |
| nvlist_t * |
| zpool_search_import(void *hdl, importargs_t *import, |
| const pool_config_ops_t *pco) |
| { |
| libpc_handle_t handle = { 0 }; |
| nvlist_t *pools = NULL; |
| |
| handle.lpc_lib_handle = hdl; |
| handle.lpc_ops = pco; |
| handle.lpc_printerr = B_TRUE; |
| |
| verify(import->poolname == NULL || import->guid == 0); |
| |
| if (import->cachefile != NULL) |
| pools = zpool_find_import_cached(&handle, import->cachefile, |
| import->poolname, import->guid); |
| else |
| pools = zpool_find_import_impl(&handle, import); |
| |
| if ((pools == NULL || nvlist_empty(pools)) && |
| handle.lpc_open_access_error && geteuid() != 0) { |
| (void) zfs_error(&handle, EZFS_EACESS, dgettext(TEXT_DOMAIN, |
| "no pools found")); |
| } |
| |
| return (pools); |
| } |
| |
| static boolean_t |
| pool_match(nvlist_t *cfg, char *tgt) |
| { |
| uint64_t v, guid = strtoull(tgt, NULL, 0); |
| char *s; |
| |
| if (guid != 0) { |
| if (nvlist_lookup_uint64(cfg, ZPOOL_CONFIG_POOL_GUID, &v) == 0) |
| return (v == guid); |
| } else { |
| if (nvlist_lookup_string(cfg, ZPOOL_CONFIG_POOL_NAME, &s) == 0) |
| return (strcmp(s, tgt) == 0); |
| } |
| return (B_FALSE); |
| } |
| |
| int |
| zpool_find_config(void *hdl, const char *target, nvlist_t **configp, |
| importargs_t *args, const pool_config_ops_t *pco) |
| { |
| nvlist_t *pools; |
| nvlist_t *match = NULL; |
| nvlist_t *config = NULL; |
| char *name = NULL, *sepp = NULL; |
| char sep = '\0'; |
| int count = 0; |
| char *targetdup = strdup(target); |
| |
| *configp = NULL; |
| |
| if ((sepp = strpbrk(targetdup, "/@")) != NULL) { |
| sep = *sepp; |
| *sepp = '\0'; |
| } |
| |
| pools = zpool_search_import(hdl, args, pco); |
| |
| if (pools != NULL) { |
| nvpair_t *elem = NULL; |
| while ((elem = nvlist_next_nvpair(pools, elem)) != NULL) { |
| VERIFY0(nvpair_value_nvlist(elem, &config)); |
| if (pool_match(config, targetdup)) { |
| count++; |
| if (match != NULL) { |
| /* multiple matches found */ |
| continue; |
| } else { |
| match = config; |
| name = nvpair_name(elem); |
| } |
| } |
| } |
| } |
| |
| if (count == 0) { |
| free(targetdup); |
| return (ENOENT); |
| } |
| |
| if (count > 1) { |
| free(targetdup); |
| return (EINVAL); |
| } |
| |
| *configp = match; |
| free(targetdup); |
| |
| return (0); |
| } |