1 /*- 2 * Copyright (c) 2008-2010 Rui Paulo 3 * Copyright (c) 2006 Marcel Moolenaar 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28 #include <sys/cdefs.h> 29 __FBSDID("$FreeBSD$"); 30 31 #include <sys/param.h> 32 #include <sys/disk.h> 33 #include <stdint.h> 34 35 #ifdef EFI_ZFS_BOOT 36 #include <libzfs.h> 37 #endif 38 39 #include <efi.h> 40 #include <efilib.h> 41 42 #include "efizfs.h" 43 44 #ifdef EFI_ZFS_BOOT 45 static zfsinfo_list_t zfsinfo; 46 47 uint64_t pool_guid; 48 49 zfsinfo_list_t * 50 efizfs_get_zfsinfo_list(void) 51 { 52 return (&zfsinfo); 53 } 54 55 EFI_HANDLE 56 efizfs_get_handle_by_guid(uint64_t guid) 57 { 58 zfsinfo_t *zi; 59 60 STAILQ_FOREACH(zi, &zfsinfo, zi_link) { 61 if (zi->zi_pool_guid == guid) { 62 return (zi->zi_handle); 63 } 64 } 65 return (NULL); 66 } 67 68 static void 69 insert_zfs(EFI_HANDLE handle, uint64_t guid) 70 { 71 zfsinfo_t *zi; 72 73 zi = malloc(sizeof(zfsinfo_t)); 74 zi->zi_handle = handle; 75 zi->zi_pool_guid = guid; 76 STAILQ_INSERT_TAIL(&zfsinfo, zi, zi_link); 77 } 78 79 void 80 efi_zfs_probe(void) 81 { 82 pdinfo_list_t *hdi; 83 pdinfo_t *hd, *pd = NULL; 84 char devname[SPECNAMELEN + 1]; 85 uint64_t guid; 86 87 hdi = efiblk_get_pdinfo_list(&efipart_hddev); 88 STAILQ_INIT(&zfsinfo); 89 90 /* 91 * Find the handle for the boot device. The boot1 did find the 92 * device with loader binary, now we need to search for the 93 * same device and if it is part of the zfs pool, we record the 94 * pool GUID for currdev setup. 95 */ 96 STAILQ_FOREACH(hd, hdi, pd_link) { 97 STAILQ_FOREACH(pd, &hd->pd_part, pd_link) { 98 99 snprintf(devname, sizeof(devname), "%s%dp%d:", 100 efipart_hddev.dv_name, hd->pd_unit, pd->pd_unit); 101 102 if (zfs_probe_dev(devname, &guid) == 0) { 103 insert_zfs(pd->pd_handle, guid); 104 105 if (efi_zfs_is_preferred(pd->pd_handle)) 106 pool_guid = guid; 107 } 108 109 } 110 } 111 } 112 #endif 113