zfs_module.c revision 294999
1/*- 2 * Copyright (c) 2015 Eric McCorkle 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD: stable/10/sys/boot/efi/boot1/zfs_module.c 294999 2016-01-28 17:24:40Z smh $ 27 */ 28#include <stddef.h> 29#include <stdarg.h> 30#include <stdbool.h> 31#include <sys/cdefs.h> 32#include <sys/param.h> 33#include <sys/queue.h> 34#include <efi.h> 35 36#include "boot_module.h" 37 38#include "libzfs.h" 39#include "zfsimpl.c" 40 41static dev_info_t *devices; 42 43static int 44vdev_read(vdev_t *vdev, void *priv, off_t off, void *buf, size_t bytes) 45{ 46 dev_info_t *devinfo; 47 off_t lba; 48 EFI_STATUS status; 49 50 devinfo = (dev_info_t *)priv; 51 lba = off / devinfo->dev->Media->BlockSize; 52 53 status = devinfo->dev->ReadBlocks(devinfo->dev, 54 devinfo->dev->Media->MediaId, lba, bytes, buf); 55 if (status != EFI_SUCCESS) { 56 DPRINTF("vdev_read: failed dev: %p, id: %u, lba: %zu, size: %zu," 57 " status: %lu\n", devinfo->dev, 58 devinfo->dev->Media->MediaId, lba, bytes, 59 EFI_ERROR_CODE(status)); 60 return (-1); 61 } 62 63 return (0); 64} 65 66static EFI_STATUS 67probe(dev_info_t *dev) 68{ 69 spa_t *spa; 70 dev_info_t *tdev; 71 EFI_STATUS status; 72 73 /* ZFS consumes the dev on success so we need a copy. */ 74 if ((status = bs->AllocatePool(EfiLoaderData, sizeof(*dev), 75 (void**)&tdev)) != EFI_SUCCESS) { 76 DPRINTF("Failed to allocate tdev (%lu)\n", 77 EFI_ERROR_CODE(status)); 78 return (status); 79 } 80 memcpy(tdev, dev, sizeof(*dev)); 81 82 if (vdev_probe(vdev_read, tdev, &spa) != 0) { 83 (void)bs->FreePool(tdev); 84 return (EFI_UNSUPPORTED); 85 } 86 87 dev->devdata = spa; 88 add_device(&devices, dev); 89 90 return (EFI_SUCCESS); 91} 92 93static EFI_STATUS 94try_load(dev_info_t *devinfo, const char *loader_path, void **bufp, size_t *bufsize) 95{ 96 spa_t *spa; 97 struct zfsmount zfsmount; 98 dnode_phys_t dn; 99 struct stat st; 100 int err; 101 void *buf; 102 EFI_STATUS status; 103 104 spa = devinfo->devdata; 105 if (zfs_spa_init(spa) != 0) { 106 /* Init failed, don't report this loudly. */ 107 return (EFI_NOT_FOUND); 108 } 109 110 if (zfs_mount(spa, 0, &zfsmount) != 0) { 111 /* Mount failed, don't report this loudly. */ 112 return (EFI_NOT_FOUND); 113 } 114 115 if ((err = zfs_lookup(&zfsmount, loader_path, &dn)) != 0) { 116 printf("Failed to lookup %s on pool %s (%d)\n", loader_path, 117 spa->spa_name, err); 118 return (EFI_INVALID_PARAMETER); 119 } 120 121 if ((err = zfs_dnode_stat(spa, &dn, &st)) != 0) { 122 printf("Failed to lookup %s on pool %s (%d)\n", loader_path, 123 spa->spa_name, err); 124 return (EFI_INVALID_PARAMETER); 125 } 126 127 if ((status = bs->AllocatePool(EfiLoaderData, (UINTN)st.st_size, &buf)) 128 != EFI_SUCCESS) { 129 printf("Failed to allocate load buffer for pool %s (%lu)\n", 130 spa->spa_name, EFI_ERROR_CODE(status)); 131 return (EFI_INVALID_PARAMETER); 132 } 133 134 if ((err = dnode_read(spa, &dn, 0, buf, st.st_size)) != 0) { 135 printf("Failed to read node from %s (%d)\n", spa->spa_name, 136 err); 137 (void)bs->FreePool(buf); 138 return (EFI_INVALID_PARAMETER); 139 } 140 141 *bufsize = st.st_size; 142 *bufp = buf; 143 144 return (EFI_SUCCESS); 145} 146 147static EFI_STATUS 148load(const char *loader_path, dev_info_t **devinfop, void **bufp, 149 size_t *bufsize) 150{ 151 dev_info_t *devinfo; 152 EFI_STATUS status; 153 154 for (devinfo = devices; devinfo != NULL; devinfo = devinfo->next) { 155 status = try_load(devinfo, loader_path, bufp, bufsize); 156 if (status == EFI_SUCCESS) { 157 *devinfop = devinfo; 158 return (EFI_SUCCESS); 159 } else if (status != EFI_NOT_FOUND) { 160 return (status); 161 } 162 } 163 164 return (EFI_NOT_FOUND); 165} 166 167static void 168status() 169{ 170 spa_t *spa; 171 172 spa = STAILQ_FIRST(&zfs_pools); 173 if (spa == NULL) { 174 printf("%s found no pools\n", zfs_module.name); 175 return; 176 } 177 178 printf("%s found the following pools:", zfs_module.name); 179 STAILQ_FOREACH(spa, &zfs_pools, spa_link) 180 printf(" %s", spa->spa_name); 181 182 printf("\n"); 183} 184 185static void 186init() 187{ 188 189 zfs_init(); 190} 191 192const boot_module_t zfs_module = 193{ 194 .name = "ZFS", 195 .init = init, 196 .probe = probe, 197 .load = load, 198 .status = status 199}; 200