diff options
Diffstat (limited to 'sys/boot/efi/boot1/zfs_module.c')
| -rw-r--r-- | sys/boot/efi/boot1/zfs_module.c | 199 |
1 files changed, 199 insertions, 0 deletions
diff --git a/sys/boot/efi/boot1/zfs_module.c b/sys/boot/efi/boot1/zfs_module.c new file mode 100644 index 0000000..96eec33 --- /dev/null +++ b/sys/boot/efi/boot1/zfs_module.c @@ -0,0 +1,199 @@ +/*- + * Copyright (c) 2015 Eric McCorkle + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + * + * $FreeBSD$ + */ +#include <stddef.h> +#include <stdarg.h> +#include <stdbool.h> +#include <sys/cdefs.h> +#include <sys/param.h> +#include <sys/queue.h> +#include <efi.h> + +#include "boot_module.h" + +#include "libzfs.h" +#include "zfsimpl.c" + +static dev_info_t *devices; + +static int +vdev_read(vdev_t *vdev, void *priv, off_t off, void *buf, size_t bytes) +{ + dev_info_t *devinfo; + off_t lba; + EFI_STATUS status; + + devinfo = (dev_info_t *)priv; + lba = off / devinfo->dev->Media->BlockSize; + + status = devinfo->dev->ReadBlocks(devinfo->dev, + devinfo->dev->Media->MediaId, lba, bytes, buf); + if (status != EFI_SUCCESS) { + DPRINTF("vdev_read: failed dev: %p, id: %u, lba: %zu, size: %zu," + " status: %lu\n", devinfo->dev, + devinfo->dev->Media->MediaId, lba, bytes, + EFI_ERROR_CODE(status)); + return (-1); + } + + return (0); +} + +static EFI_STATUS +probe(dev_info_t *dev) +{ + spa_t *spa; + dev_info_t *tdev; + EFI_STATUS status; + + /* ZFS consumes the dev on success so we need a copy. */ + if ((status = bs->AllocatePool(EfiLoaderData, sizeof(*dev), + (void**)&tdev)) != EFI_SUCCESS) { + DPRINTF("Failed to allocate tdev (%lu)\n", + EFI_ERROR_CODE(status)); + return (status); + } + memcpy(tdev, dev, sizeof(*dev)); + + if (vdev_probe(vdev_read, tdev, &spa) != 0) { + (void)bs->FreePool(tdev); + return (EFI_UNSUPPORTED); + } + + dev->devdata = spa; + add_device(&devices, dev); + + return (EFI_SUCCESS); +} + +static EFI_STATUS +try_load(dev_info_t *devinfo, const char *loader_path, void **bufp, size_t *bufsize) +{ + spa_t *spa; + struct zfsmount zfsmount; + dnode_phys_t dn; + struct stat st; + int err; + void *buf; + EFI_STATUS status; + + spa = devinfo->devdata; + if (zfs_spa_init(spa) != 0) { + /* Init failed, don't report this loudly. */ + return (EFI_NOT_FOUND); + } + + if (zfs_mount(spa, 0, &zfsmount) != 0) { + /* Mount failed, don't report this loudly. */ + return (EFI_NOT_FOUND); + } + + if ((err = zfs_lookup(&zfsmount, loader_path, &dn)) != 0) { + printf("Failed to lookup %s on pool %s (%d)\n", loader_path, + spa->spa_name, err); + return (EFI_INVALID_PARAMETER); + } + + if ((err = zfs_dnode_stat(spa, &dn, &st)) != 0) { + printf("Failed to lookup %s on pool %s (%d)\n", loader_path, + spa->spa_name, err); + return (EFI_INVALID_PARAMETER); + } + + if ((status = bs->AllocatePool(EfiLoaderData, (UINTN)st.st_size, &buf)) + != EFI_SUCCESS) { + printf("Failed to allocate load buffer for pool %s (%lu)\n", + spa->spa_name, EFI_ERROR_CODE(status)); + return (EFI_INVALID_PARAMETER); + } + + if ((err = dnode_read(spa, &dn, 0, buf, st.st_size)) != 0) { + printf("Failed to read node from %s (%d)\n", spa->spa_name, + err); + (void)bs->FreePool(buf); + return (EFI_INVALID_PARAMETER); + } + + *bufsize = st.st_size; + *bufp = buf; + + return (EFI_SUCCESS); +} + +static EFI_STATUS +load(const char *loader_path, dev_info_t **devinfop, void **bufp, + size_t *bufsize) +{ + dev_info_t *devinfo; + EFI_STATUS status; + + for (devinfo = devices; devinfo != NULL; devinfo = devinfo->next) { + status = try_load(devinfo, loader_path, bufp, bufsize); + if (status == EFI_SUCCESS) { + *devinfop = devinfo; + return (EFI_SUCCESS); + } else if (status != EFI_NOT_FOUND) { + return (status); + } + } + + return (EFI_NOT_FOUND); +} + +static void +status() +{ + spa_t *spa; + + spa = STAILQ_FIRST(&zfs_pools); + if (spa == NULL) { + printf("%s found no pools\n", zfs_module.name); + return; + } + + printf("%s found the following pools:", zfs_module.name); + STAILQ_FOREACH(spa, &zfs_pools, spa_link) + printf(" %s", spa->spa_name); + + printf("\n"); +} + +static void +init() +{ + + zfs_init(); +} + +const boot_module_t zfs_module = +{ + .name = "ZFS", + .init = init, + .probe = probe, + .load = load, + .status = status +}; |
