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 <stand.h> 33 34 #ifdef EFI_ZFS_BOOT 35 #include <libzfs.h> 36 #endif 37 38 #include <efi.h> 39 #include <efilib.h> 40 41 #include "efizfs.h" 42 43 #ifdef EFI_ZFS_BOOT 44 static zfsinfo_list_t zfsinfo; 45 46 uint64_t pool_guid; 47 48 static EFI_HANDLE preferred; 49 50 void 51 efizfs_set_preferred(EFI_HANDLE h) 52 { 53 preferred = h; 54 } 55 56 zfsinfo_list_t * 57 efizfs_get_zfsinfo_list(void) 58 { 59 return (&zfsinfo); 60 } 61 62 EFI_HANDLE 63 efizfs_get_handle_by_guid(uint64_t guid) 64 { 65 zfsinfo_t *zi; 66 67 STAILQ_FOREACH(zi, &zfsinfo, zi_link) { 68 if (zi->zi_pool_guid == guid) { 69 return (zi->zi_handle); 70 } 71 } 72 return (NULL); 73 } 74 75 bool 76 efizfs_get_guid_by_handle(EFI_HANDLE handle, uint64_t *guid) 77 { 78 zfsinfo_t *zi; 79 80 if (guid == NULL) 81 return (false); 82 STAILQ_FOREACH(zi, &zfsinfo, zi_link) { 83 if (zi->zi_handle == handle) { 84 *guid = zi->zi_pool_guid; 85 return (true); 86 } 87 } 88 return (false); 89 } 90 91 static void 92 insert_zfs(EFI_HANDLE handle, uint64_t guid) 93 { 94 zfsinfo_t *zi; 95 96 zi = malloc(sizeof(zfsinfo_t)); 97 zi->zi_handle = handle; 98 zi->zi_pool_guid = guid; 99 STAILQ_INSERT_TAIL(&zfsinfo, zi, zi_link); 100 } 101 102 void 103 efi_zfs_probe(void) 104 { 105 pdinfo_list_t *hdi; 106 pdinfo_t *hd, *pd = NULL; 107 char devname[SPECNAMELEN + 1]; 108 uint64_t guid; 109 110 hdi = efiblk_get_pdinfo_list(&efipart_hddev); 111 STAILQ_INIT(&zfsinfo); 112 113 /* 114 * Find the handle for the boot device. The boot1 did find the 115 * device with loader binary, now we need to search for the 116 * same device and if it is part of the zfs pool, we record the 117 * pool GUID for currdev setup. 118 */ 119 STAILQ_FOREACH(hd, hdi, pd_link) { 120 STAILQ_FOREACH(pd, &hd->pd_part, pd_link) { 121 snprintf(devname, sizeof(devname), "%s%dp%d:", 122 efipart_hddev.dv_name, hd->pd_unit, pd->pd_unit); 123 if (zfs_probe_dev(devname, &guid) == 0) { 124 insert_zfs(pd->pd_handle, guid); 125 if (pd->pd_handle == preferred) 126 pool_guid = guid; 127 } 128 129 } 130 } 131 } 132 #endif 133