2 * Copyright (c) 2015 Eric McCorkle
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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
30 #include <sys/param.h>
31 #include <sys/queue.h>
34 #include "boot_module.h"
39 static dev_info_t *devices;
41 static char zfs_bootonce[VDEV_PAD_SIZE];
44 ldi_get_size(void *priv)
46 dev_info_t *devinfo = priv;
48 return (devinfo->dev->Media->BlockSize *
49 (devinfo->dev->Media->LastBlock + 1));
53 vdev_read(vdev_t *vdev, void *priv, off_t off, void *buf, size_t bytes)
57 size_t size, remainder, rb_size, blksz;
58 char *bouncebuf = NULL, *rb_buf;
61 devinfo = (dev_info_t *)priv;
62 lba = off / devinfo->dev->Media->BlockSize;
63 remainder = off % devinfo->dev->Media->BlockSize;
69 * If we have remainder from off, we need to add remainder part.
70 * Since buffer must be multiple of the BlockSize, round it all up.
72 size = roundup2(bytes + remainder, devinfo->dev->Media->BlockSize);
74 if (remainder != 0 || size != bytes) {
75 rb_size = devinfo->dev->Media->BlockSize;
76 bouncebuf = malloc(rb_size);
77 if (bouncebuf == NULL) {
78 printf("vdev_read: out of memory\n");
82 blksz = rb_size - remainder;
86 status = devinfo->dev->ReadBlocks(devinfo->dev,
87 devinfo->dev->Media->MediaId, lba, rb_size, rb_buf);
88 if (EFI_ERROR(status))
92 if (bouncebuf != NULL)
93 memcpy(buf, rb_buf + remainder, blksz);
94 buf = (void *)((uintptr_t)buf + blksz);
106 DPRINTF("vdev_read: failed dev: %p, id: %u, lba: %ju, size: %zu,"
107 " rb_size: %zu, status: %lu\n", devinfo->dev,
108 devinfo->dev->Media->MediaId, (uintmax_t)lba, bytes, rb_size,
109 EFI_ERROR_CODE(status));
114 probe(dev_info_t *dev)
119 /* ZFS consumes the dev on success so we need a copy. */
120 tdev = malloc(sizeof(*dev));
122 DPRINTF("Failed to allocate tdev\n");
123 return (EFI_OUT_OF_RESOURCES);
125 memcpy(tdev, dev, sizeof(*dev));
127 if (vdev_probe(vdev_read, NULL, tdev, &spa) != 0) {
129 return (EFI_UNSUPPORTED);
133 add_device(&devices, dev);
135 return (EFI_SUCCESS);
139 load(const char *filepath, dev_info_t *devinfo, void **bufp, size_t *bufsize)
142 struct zfsmount zmount;
149 spa = devinfo->devdata;
153 CHAR16 *text = efi_devpath_name(devinfo->devpath);
154 DPRINTF("load: '%s' spa: '%s', devpath: %S\n", filepath,
155 spa->spa_name, text);
156 efi_free_devpath_name(text);
159 if ((err = zfs_spa_init(spa)) != 0) {
160 DPRINTF("Failed to load pool '%s' (%d)\n", spa->spa_name, err);
161 return (EFI_NOT_FOUND);
164 if (zfs_get_bootonce_spa(spa, OS_BOOTONCE, zfs_bootonce,
165 sizeof(zfs_bootonce)) == 0) {
167 * If bootonce attribute is present, use it as root dataset.
168 * Any attempt to use it should clear the 'once' flag. Prior
169 * to now, we'd not be able to clear it anyway. We don't care
170 * if we can't find the files to boot, or if there's a problem
171 * with it: we've tried to use it once we're able to mount the
174 * Note: the attribute is prefixed with "zfs:" and suffixed
179 if (zfs_bootonce[0] != 'z' || zfs_bootonce[1] != 'f' ||
180 zfs_bootonce[2] != 's' || zfs_bootonce[3] != ':' ||
181 (dname = strchr(&zfs_bootonce[4], '/')) == NULL ||
182 (end = strrchr(&zfs_bootonce[4], ':')) == NULL) {
183 printf("INVALID zfs bootonce: %s\n", zfs_bootonce);
184 *zfs_bootonce = '\0';
189 if (zfs_lookup_dataset(spa, dname, &rootobj) != 0) {
190 printf("zfs bootonce dataset %s NOT FOUND\n",
192 *zfs_bootonce = '\0';
195 printf("zfs bootonce: %s\n", zfs_bootonce);
199 *zfs_bootonce = '\0';
203 if ((err = zfs_mount_impl(spa, rootobj, &zmount)) != 0) {
204 printf("Failed to mount pool '%s' (%d)\n", spa->spa_name, err);
205 return (EFI_NOT_FOUND);
208 if ((err = zfs_lookup(&zmount, filepath, &dn)) != 0) {
210 DPRINTF("Failed to find '%s' on pool '%s' (%d)\n",
211 filepath, spa->spa_name, err);
212 return (EFI_NOT_FOUND);
214 printf("Failed to lookup '%s' on pool '%s' (%d)\n", filepath,
216 return (EFI_INVALID_PARAMETER);
219 if ((err = zfs_dnode_stat(spa, &dn, &st)) != 0) {
220 printf("Failed to stat '%s' on pool '%s' (%d)\n", filepath,
222 return (EFI_INVALID_PARAMETER);
225 buf = malloc(st.st_size);
227 printf("Failed to allocate load buffer %jd for pool '%s' for '%s' ",
228 (intmax_t)st.st_size, spa->spa_name, filepath);
229 return (EFI_INVALID_PARAMETER);
232 if ((err = dnode_read(spa, &dn, 0, buf, st.st_size)) != 0) {
233 printf("Failed to read node from %s (%d)\n", spa->spa_name,
236 return (EFI_INVALID_PARAMETER);
239 *bufsize = st.st_size;
242 return (EFI_SUCCESS);
250 spa = STAILQ_FIRST(&zfs_pools);
252 printf("%s found no pools\n", zfs_module.name);
256 printf("%s found the following pools:", zfs_module.name);
257 STAILQ_FOREACH(spa, &zfs_pools, spa_link)
258 printf(" %s", spa->spa_name);
266 char *rv = NULL; /* So we return NULL if asprintf fails */
268 if (*zfs_bootonce == '\0')
270 asprintf(&rv, "zfs-bootonce=%s", zfs_bootonce);
289 const boot_module_t zfs_module =
297 .extra_env = extra_env,