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
31 #include <sys/cdefs.h>
32 #include <sys/param.h>
33 #include <sys/queue.h>
36 #include "boot_module.h"
41 static dev_info_t *devices;
43 static char zfs_bootonce[VDEV_PAD_SIZE];
46 ldi_get_size(void *priv)
48 dev_info_t *devinfo = priv;
50 return (devinfo->dev->Media->BlockSize *
51 (devinfo->dev->Media->LastBlock + 1));
55 vdev_read(vdev_t *vdev, void *priv, off_t off, void *buf, size_t bytes)
59 size_t size, remainder, rb_size, blksz;
60 char *bouncebuf = NULL, *rb_buf;
63 devinfo = (dev_info_t *)priv;
64 lba = off / devinfo->dev->Media->BlockSize;
65 remainder = off % devinfo->dev->Media->BlockSize;
71 * If we have remainder from off, we need to add remainder part.
72 * Since buffer must be multiple of the BlockSize, round it all up.
74 size = roundup2(bytes + remainder, devinfo->dev->Media->BlockSize);
76 if (remainder != 0 || size != bytes) {
77 rb_size = devinfo->dev->Media->BlockSize;
78 bouncebuf = malloc(rb_size);
79 if (bouncebuf == NULL) {
80 printf("vdev_read: out of memory\n");
84 blksz = rb_size - remainder;
88 status = devinfo->dev->ReadBlocks(devinfo->dev,
89 devinfo->dev->Media->MediaId, lba, rb_size, rb_buf);
90 if (EFI_ERROR(status))
94 if (bouncebuf != NULL)
95 memcpy(buf, rb_buf + remainder, blksz);
96 buf = (void *)((uintptr_t)buf + blksz);
108 DPRINTF("vdev_read: failed dev: %p, id: %u, lba: %ju, size: %zu,"
109 " rb_size: %zu, status: %lu\n", devinfo->dev,
110 devinfo->dev->Media->MediaId, (uintmax_t)lba, bytes, rb_size,
111 EFI_ERROR_CODE(status));
116 probe(dev_info_t *dev)
121 /* ZFS consumes the dev on success so we need a copy. */
122 tdev = malloc(sizeof(*dev));
124 DPRINTF("Failed to allocate tdev\n");
125 return (EFI_OUT_OF_RESOURCES);
127 memcpy(tdev, dev, sizeof(*dev));
129 if (vdev_probe(vdev_read, NULL, tdev, &spa) != 0) {
131 return (EFI_UNSUPPORTED);
135 add_device(&devices, dev);
137 return (EFI_SUCCESS);
141 load(const char *filepath, dev_info_t *devinfo, void **bufp, size_t *bufsize)
144 struct zfsmount zmount;
151 spa = devinfo->devdata;
155 CHAR16 *text = efi_devpath_name(devinfo->devpath);
156 DPRINTF("load: '%s' spa: '%s', devpath: %S\n", filepath,
157 spa->spa_name, text);
158 efi_free_devpath_name(text);
161 if ((err = zfs_spa_init(spa)) != 0) {
162 DPRINTF("Failed to load pool '%s' (%d)\n", spa->spa_name, err);
163 return (EFI_NOT_FOUND);
166 if (zfs_get_bootonce_spa(spa, OS_BOOTONCE, zfs_bootonce,
167 sizeof(zfs_bootonce)) == 0) {
169 * If bootonce attribute is present, use it as root dataset.
170 * Any attempt to use it should clear the 'once' flag. Prior
171 * to now, we'd not be able to clear it anyway. We don't care
172 * if we can't find the files to boot, or if there's a problem
173 * with it: we've tried to use it once we're able to mount the
176 * Note: the attribute is prefixed with "zfs:" and suffixed
181 if (zfs_bootonce[0] != 'z' || zfs_bootonce[1] != 'f' ||
182 zfs_bootonce[2] != 's' || zfs_bootonce[3] != ':' ||
183 (dname = strchr(&zfs_bootonce[4], '/')) == NULL ||
184 (end = strrchr(&zfs_bootonce[4], ':')) == NULL) {
185 printf("INVALID zfs bootonce: %s\n", zfs_bootonce);
186 *zfs_bootonce = '\0';
191 if (zfs_lookup_dataset(spa, dname, &rootobj) != 0) {
192 printf("zfs bootonce dataset %s NOT FOUND\n",
194 *zfs_bootonce = '\0';
197 printf("zfs bootonce: %s\n", zfs_bootonce);
201 *zfs_bootonce = '\0';
205 if ((err = zfs_mount_impl(spa, rootobj, &zmount)) != 0) {
206 printf("Failed to mount pool '%s' (%d)\n", spa->spa_name, err);
207 return (EFI_NOT_FOUND);
210 if ((err = zfs_lookup(&zmount, filepath, &dn)) != 0) {
212 DPRINTF("Failed to find '%s' on pool '%s' (%d)\n",
213 filepath, spa->spa_name, err);
214 return (EFI_NOT_FOUND);
216 printf("Failed to lookup '%s' on pool '%s' (%d)\n", filepath,
218 return (EFI_INVALID_PARAMETER);
221 if ((err = zfs_dnode_stat(spa, &dn, &st)) != 0) {
222 printf("Failed to stat '%s' on pool '%s' (%d)\n", filepath,
224 return (EFI_INVALID_PARAMETER);
227 buf = malloc(st.st_size);
229 printf("Failed to allocate load buffer %jd for pool '%s' for '%s' ",
230 (intmax_t)st.st_size, spa->spa_name, filepath);
231 return (EFI_INVALID_PARAMETER);
234 if ((err = dnode_read(spa, &dn, 0, buf, st.st_size)) != 0) {
235 printf("Failed to read node from %s (%d)\n", spa->spa_name,
238 return (EFI_INVALID_PARAMETER);
241 *bufsize = st.st_size;
244 return (EFI_SUCCESS);
252 spa = STAILQ_FIRST(&zfs_pools);
254 printf("%s found no pools\n", zfs_module.name);
258 printf("%s found the following pools:", zfs_module.name);
259 STAILQ_FOREACH(spa, &zfs_pools, spa_link)
260 printf(" %s", spa->spa_name);
268 char *rv = NULL; /* So we return NULL if asprintf fails */
270 if (*zfs_bootonce == '\0')
272 asprintf(&rv, "zfs-bootonce=%s", zfs_bootonce);
291 const boot_module_t zfs_module =
299 .extra_env = extra_env,