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