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 #include <sys/param.h> 30 #include <stand.h> 31 32 #ifdef EFI_ZFS_BOOT 33 #include <libzfs.h> 34 #endif 35 36 #include <efi.h> 37 #include <efilib.h> 38 39 #include "efizfs.h" 40 41 #ifdef EFI_ZFS_BOOT 42 static zfsinfo_list_t zfsinfo; 43 44 uint64_t pool_guid; 45 46 zfsinfo_list_t * 47 efizfs_get_zfsinfo_list(void) 48 { 49 return (&zfsinfo); 50 } 51 52 EFI_HANDLE 53 efizfs_get_handle_by_guid(uint64_t guid) 54 { 55 zfsinfo_t *zi; 56 57 STAILQ_FOREACH(zi, &zfsinfo, zi_link) { 58 if (zi->zi_pool_guid == guid) { 59 return (zi->zi_handle); 60 } 61 } 62 return (NULL); 63 } 64 65 bool 66 efizfs_get_guid_by_handle(EFI_HANDLE handle, uint64_t *guid) 67 { 68 zfsinfo_t *zi; 69 70 if (guid == NULL) 71 return (false); 72 STAILQ_FOREACH(zi, &zfsinfo, zi_link) { 73 if (zi->zi_handle == handle) { 74 *guid = zi->zi_pool_guid; 75 return (true); 76 } 77 } 78 return (false); 79 } 80 81 static void 82 insert_zfs(EFI_HANDLE handle, uint64_t guid) 83 { 84 zfsinfo_t *zi; 85 86 zi = malloc(sizeof(zfsinfo_t)); 87 if (zi != NULL) { 88 zi->zi_handle = handle; 89 zi->zi_pool_guid = guid; 90 STAILQ_INSERT_TAIL(&zfsinfo, zi, zi_link); 91 } 92 } 93 94 void 95 efi_zfs_probe(void) 96 { 97 pdinfo_list_t *hdi; 98 pdinfo_t *hd, *pd = NULL; 99 char devname[SPECNAMELEN + 1]; 100 uint64_t guid; 101 102 hdi = efiblk_get_pdinfo_list(&efipart_hddev); 103 STAILQ_INIT(&zfsinfo); 104 105 /* 106 * Find the handle for the boot device. The boot1 did find the 107 * device with loader binary, now we need to search for the 108 * same device and if it is part of the zfs pool, we record the 109 * pool GUID for currdev setup. 110 */ 111 STAILQ_FOREACH(hd, hdi, pd_link) { 112 STAILQ_FOREACH(pd, &hd->pd_part, pd_link) { 113 snprintf(devname, sizeof(devname), "%s%dp%d:", 114 efipart_hddev.dv_name, hd->pd_unit, pd->pd_unit); 115 guid = 0; 116 if (zfs_probe_dev(devname, &guid, false) == 0) { 117 insert_zfs(pd->pd_handle, guid); 118 if (pd->pd_handle == boot_img->DeviceHandle) 119 pool_guid = guid; 120 } 121 122 } 123 } 124 } 125 #endif 126