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Add initial support for booting from ZFS on sparc64. At least on Sun Fire

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V100, the firmware is known to be broken and not allowing to simultaneously
open disk devices, causing attempts to boot from a mirror or RAIDZ to cause
a crash. This will be worked around later. The firmwares of newer sun4u models
don't seem to exhibit this problem though.

Steps for ZFS booting:

1. create VTOC8 label
# gpart create -s vtoc8 da0

2. add partitions, f.e.:
# gpart add -t freebsd-zfs -s 60g da0
# gpart add -t freebsd-swap da0
resulting in something like:
# gpart show
=>        0  143331930  da0  VTOC8  (68G)
          0  125821080    1  freebsd-zfs  (60G)
  125821080   17510850    2  freebsd-swap  (8.4G)

3. create zpool
# zpool create bunker da0a
or for mirror/RAIDZ (after preparing additional disks as in steps 1. + 2.):
# zpool create bunker mirror da0a da1a
# zpool create bunker raidz da0a da1a da2a ...

4. set bootfs
# zpool set bootfs=bunker bunker

5. install zfsboot
# zpool export bunker
# gpart bootcode -p /boot/zfsboot da0

6. write zfsloader to the ZFS Boot Block (so far, there's no dedicated tool
for this, so dd(1) has to be used for this purpose)
When using mirror/RAIDZ, step 4. and the dd(1) invocation should be repeated
for the additional disks in order to be able to boot from another disk in
case of failure.
# sysctl kern.geom.debugflags=0x10
# dd if=/boot/zfsloader of=/dev/da0a bs=512 oseek=1024 conv=notrunc
# zpool import bunker

7. install system on ZFS filesystem
Don't forget to set 'zfs_load="YES"' and vfs.root.mountfrom="zfs:bunker" in
loader.conf as well as 'zfs_enable="YES"'in rc.conf.

8. copy zpool.cache to the ZFS filesystem
cp -p /boot/zfs/zpool.cache /bunker/boot/zfs/zpool.cache

9. set mountpoint
# zfs set mountpoint=/ bunker

10. Now, given that aliases for all disks in the zpool exists (check with
the `devalias` command on the boot monitor prompt) and disk0 corresponds
to da0 (likewise for additional disks), the system can be booted from the
ZFS with:
{1} ok boot disk0

PR:             165025
Submitted by:   Gavin Mu
This commit is contained in:
Marius Strobl 2012-05-01 17:16:01 +00:00
parent e2a35695f8
commit 2d75b8321f
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=234898
9 changed files with 282 additions and 44 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

22
sys/boot/ofw/libofw/devicename.c
View File

@ -28,6 +28,8 @@
__FBSDID("$FreeBSD$");
#include <stand.h>
#include "bootstrap.h"
#include "libofw.h"
static int ofw_parsedev(struct ofw_devdesc **, const char *, const char **);
@ -76,6 +78,7 @@ ofw_parsedev(struct ofw_devdesc **dev, const char *devspec, const char **path)
phandle_t handle;
const char *p;
const char *s;
char *ep;
char name[256];
char type[64];
int len;
@ -87,9 +90,10 @@ ofw_parsedev(struct ofw_devdesc **dev, const char *devspec, const char **path)
len = s - devspec;
bcopy(devspec, name, len);
name[len] = '\0';
if ((handle = OF_finddevice(name)) == -1)
break;
if (OF_getprop(handle, "device_type", type, sizeof(type)) == -1)
if ((handle = OF_finddevice(name)) == -1) {
bcopy(name, type, len);
type[len] = '\0';
} else if (OF_getprop(handle, "device_type", type, sizeof(type)) == -1)
continue;
for (i = 0; (dv = devsw[i]) != NULL; i++) {
if (strncmp(dv->dv_name, type, strlen(dv->dv_name)) == 0)
@ -109,6 +113,18 @@ ofw_parsedev(struct ofw_devdesc **dev, const char *devspec, const char **path)
strcpy(idev->d_path, name);
idev->d_dev = dv;
idev->d_type = dv->dv_type;
if (idev->d_type == DEVT_ZFS) {
idev->d_unit = 0;
p = name + strlen(dv->dv_name);
if (*p && (*p != ':')) {
idev->d_unit = strtol(p, &ep, 0);
if (ep == p) {
free(idev);
return (EUNIT);
}
}
}
if (dev == NULL) {
free(idev);
} else {

2
sys/boot/sparc64/Makefile
View File

@ -1,5 +1,5 @@
# $FreeBSD$
SUBDIR= boot1 loader
SUBDIR= boot1 loader zfsboot zfsloader
.include <bsd.subdir.mk>

9
sys/boot/sparc64/boot1/Makefile
View File

@ -3,22 +3,23 @@
PROG= boot1.elf
INTERNALPROG=
NO_MAN=
FILES= boot1
FILES?= boot1
SRCS= _start.s boot1.c
CLEANFILES+=boot1 boot1.aout
BOOTBLOCKBASE= 0x4000
CFLAGS= -mcmodel=medlow -Os -I${.CURDIR}/../../common
CFLAGS+=-mcmodel=medlow -Os -I${.CURDIR}/../../common
LDFLAGS=-Ttext ${BOOTBLOCKBASE} -Wl,-N
# Construct boot1. sunlabel expects it to contain zeroed-out space for the
# label, and to be of the correct size.
boot1: boot1.aout
@set -- `ls -l boot1.aout`; x=$$((7680-$$5)); \
echo "$$x bytes available"; test $$x -ge 0
dd if=/dev/zero of=${.TARGET} bs=512 count=16
dd if=boot1.aout of=${.TARGET} bs=512 oseek=1 conv=notrunc
CLEANFILES= boot1.aout
boot1.aout: boot1.elf
elf2aout -o ${.TARGET} ${.ALLSRC}

138
sys/boot/sparc64/boot1/boot1.c
View File

@ -20,11 +20,13 @@ __FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/dirent.h>
#include <machine/elf.h>
#include <machine/stdarg.h>
#define _PATH_LOADER "/boot/loader"
#define _PATH_KERNEL "/boot/kernel/kernel"
#define _PATH_LOADER "/boot/loader"
#define _PATH_KERNEL "/boot/kernel/kernel"
#define READ_BUF_SIZE 8192
typedef int putc_func_t(char c, void *arg);
typedef int32_t ofwh_t;
@ -45,17 +47,21 @@ static ofwh_t bootdev;
static uint32_t fs_off;
int main(int ac, char **av);
static void exit(int) __dead2;
static void load(const char *);
static int dskread(void *, u_int64_t, int);
static void usage(void);
#ifdef ZFSBOOT
static void loadzfs(void);
static int zbread(char *buf, off_t off, size_t bytes);
#else
static void load(const char *);
#endif
static void bcopy(const void *src, void *dst, size_t len);
static void bzero(void *b, size_t len);
static int mount(const char *device);
static int dskread(void *buf, u_int64_t lba, int nblk);
static void panic(const char *fmt, ...) __dead2;
static int printf(const char *fmt, ...);
@ -312,8 +318,6 @@ strcmp(const char *s1, const char *s2)
return ((u_char)*s1 - (u_char)*s2);
}
#include "ufsread.c"
int
main(int ac, char **av)
{
@ -335,14 +339,22 @@ main(int ac, char **av)
}
}
printf(" \n>> FreeBSD/sparc64 boot block\n"
" Boot path: %s\n"
" Boot loader: %s\n", bootpath, path);
#ifdef ZFSBOOT
printf(" \n>> FreeBSD/sparc64 ZFS boot block\n Boot path: %s\n",
bootpath);
#else
printf(" \n>> FreeBSD/sparc64 boot block\n Boot path: %s\n"
" Boot loader: %s\n", "", bootpath, path);
#endif
if (mount(bootpath) == -1)
panic("mount");
#ifdef ZFSBOOT
loadzfs();
#else
load(path);
#endif
return (1);
}
@ -361,24 +373,86 @@ exit(int code)
ofw_exit();
}
static struct dmadat __dmadat;
#ifdef ZFSBOOT
#define VDEV_BOOT_OFFSET (2 * 256 * 1024)
static char zbuf[READ_BUF_SIZE];
static int
mount(const char *device)
zbread(char *buf, off_t off, size_t bytes)
{
size_t len;
off_t poff;
off_t soff;
char *p;
unsigned int nb;
unsigned int lb;
dmadat = &__dmadat;
if ((bootdev = ofw_open(device)) == -1) {
printf("mount: can't open device\n");
return (-1);
p = buf;
soff = VDEV_BOOT_OFFSET + off;
lb = (soff + bytes + DEV_BSIZE - 1) / DEV_BSIZE;
poff = soff;
while (poff < soff + bytes) {
nb = lb - poff / DEV_BSIZE;
if (nb > READ_BUF_SIZE / DEV_BSIZE)
nb = READ_BUF_SIZE / DEV_BSIZE;
if (dskread(zbuf, poff / DEV_BSIZE, nb))
break;
if ((poff / DEV_BSIZE + nb) * DEV_BSIZE > soff + bytes)
len = soff + bytes - poff;
else
len = (poff / DEV_BSIZE + nb) * DEV_BSIZE - poff;
memcpy(p, zbuf + poff % DEV_BSIZE, len);
p += len;
poff += len;
}
if (fsread(0, NULL, 0)) {
printf("mount: can't read superblock\n");
return (-1);
}
return (0);
return (poff - soff);
}
static void
loadzfs(void)
{
Elf64_Ehdr eh;
Elf64_Phdr ph;
caddr_t p;
ino_t ino;
int i;
if (zbread((char *)&eh, 0, sizeof(eh)) != sizeof(eh)) {
printf("Can't read elf header\n");
return;
}
if (!IS_ELF(eh)) {
printf("Not an ELF file\n");
return;
}
for (i = 0; i < eh.e_phnum; i++) {
fs_off = eh.e_phoff + i * eh.e_phentsize;
if (zbread((char *)&ph, fs_off, sizeof(ph)) != sizeof(ph)) {
printf("Can't read program header %d\n", i);
return;
}
if (ph.p_type != PT_LOAD)
continue;
fs_off = ph.p_offset;
p = (caddr_t)ph.p_vaddr;
if (zbread(p, fs_off, ph.p_filesz) != ph.p_filesz) {
printf("Can't read content of section %d\n", i);
return;
}
if (ph.p_filesz != ph.p_memsz)
bzero(p + ph.p_filesz, ph.p_memsz - ph.p_filesz);
}
ofw_close(bootdev);
(*(void (*)(int, int, int, int, ofwfp_t))eh.e_entry)(0, 0, 0, 0, ofw);
}
#else
#include "ufsread.c"
static struct dmadat __dmadat;
static void
load(const char *fname)
{
@ -421,6 +495,26 @@ load(const char *fname)
(*(void (*)(int, int, int, int, ofwfp_t))eh.e_entry)(0, 0, 0, 0, ofw);
}
#endif /* ZFSBOOT */
static int
mount(const char *device)
{
if ((bootdev = ofw_open(device)) == -1) {
printf("mount: can't open device\n");
return (-1);
}
#ifndef ZFSBOOT
dmadat = &__dmadat;
if (fsread(0, NULL, 0)) {
printf("mount: can't read superblock\n");
return (-1);
}
#endif
return (0);
}
static int
dskread(void *buf, u_int64_t lba, int nblk)
{

22
sys/boot/sparc64/loader/Makefile
View File

@ -3,8 +3,8 @@
.include <bsd.own.mk>
MK_SSP= no
PROG= loader
NEWVERSWHAT= "bootstrap loader" sparc64
PROG?= loader
NEWVERSWHAT?= "bootstrap loader" sparc64
INSTALLFLAGS= -b
# Architecture-specific loader code
@ -13,12 +13,17 @@ SRCS= locore.S main.c metadata.c vers.c
LOADER_DISK_SUPPORT?= yes
LOADER_UFS_SUPPORT?= yes
LOADER_CD9660_SUPPORT?= yes
LOADER_ZFS_SUPPORT?= no
LOADER_NET_SUPPORT?= yes
LOADER_NFS_SUPPORT?= yes
LOADER_TFTP_SUPPORT?= yes
LOADER_GZIP_SUPPORT?= yes
LOADER_BZIP2_SUPPORT?= no
LOADER_DEBUG?= no
.if ${LOADER_DEBUG} == "yes"
CFLAGS+= -DLOADER_DEBUG
.endif
.if ${LOADER_DISK_SUPPORT} == "yes"
CFLAGS+= -DLOADER_DISK_SUPPORT
.endif
@ -28,6 +33,11 @@ CFLAGS+= -DLOADER_UFS_SUPPORT
.if ${LOADER_CD9660_SUPPORT} == "yes"
CFLAGS+= -DLOADER_CD9660_SUPPORT
.endif
.if ${LOADER_ZFS_SUPPORT} == "yes"
CFLAGS+= -DLOADER_ZFS_SUPPORT
CFLAGS+= -I${.CURDIR}/../../zfs
CFLAGS+= -I${.CURDIR}/../../../cddl/boot/zfs
.endif
.if ${LOADER_GZIP_SUPPORT} == "yes"
CFLAGS+= -DLOADER_GZIP_SUPPORT
.endif
@ -47,7 +57,8 @@ CFLAGS+= -DLOADER_TFTP_SUPPORT
.if ${MK_FORTH} != "no"
# Enable BootForth
BOOT_FORTH= yes
CFLAGS+= -DBOOT_FORTH -I${.CURDIR}/../../ficl -I${.CURDIR}/../../ficl/sparc64
CFLAGS+= -DBOOT_FORTH -I${.CURDIR}/../../ficl
CFLAGS+= -I${.CURDIR}/../../ficl/sparc64
LIBFICL= ${.OBJDIR}/../../ficl/libficl.a
.endif
@ -75,8 +86,9 @@ CFLAGS+= -I${.CURDIR}/../../../../lib/libstand/
DPADD= ${LIBFICL} ${LIBOFW} ${LIBSTAND}
LDADD= ${LIBFICL} ${LIBOFW} -lstand
vers.c: ${.CURDIR}/../../common/newvers.sh ${.CURDIR}/version
sh ${.CURDIR}/../../common/newvers.sh ${.CURDIR}/version ${NEWVERSWHAT}
vers.c: ${.CURDIR}/../../common/newvers.sh ${.CURDIR}/../loader/version
sh ${.CURDIR}/../../common/newvers.sh ${.CURDIR}/../loader/version \
${NEWVERSWHAT}
loader.help: help.common help.sparc64
cat ${.ALLSRC} | \

109
sys/boot/sparc64/loader/main.c
View File

@ -51,6 +51,9 @@ __FBSDID("$FreeBSD$");
#include <sys/linker.h>
#include <sys/queue.h>
#include <sys/types.h>
#ifdef LOADER_ZFS_SUPPORT
#include <sys/vtoc.h>
#endif
#include <vm/vm.h>
#include <machine/asi.h>
@ -143,6 +146,11 @@ static vm_offset_t heapva;
static phandle_t root;
#ifdef LOADER_ZFS_SUPPORT
static int zfs_dev_init(void);
#include "zfs.c"
#endif
/*
* Machine dependent structures that the machine independent
* loader part uses.
@ -153,6 +161,9 @@ struct devsw *devsw[] = {
#endif
#ifdef LOADER_NET_SUPPORT
&netdev,
#endif
#ifdef LOADER_ZFS_SUPPORT
&zfs_dev,
#endif
0
};
@ -166,6 +177,7 @@ struct file_format *file_formats[] = {
&sparc64_elf,
0
};
struct fs_ops *file_system[] = {
#ifdef LOADER_UFS_SUPPORT
&ufs_fsops,
@ -173,6 +185,9 @@ struct fs_ops *file_system[] = {
#ifdef LOADER_CD9660_SUPPORT
&cd9660_fsops,
#endif
#ifdef LOADER_ZFS_SUPPORT
&zfs_fsops,
#endif
#ifdef LOADER_ZIP_SUPPORT
&zipfs_fsops,
#endif
@ -721,6 +736,82 @@ tlb_init_sun4u(void)
panic("%s: can't allocate TLB store", __func__);
}
#ifdef LOADER_ZFS_SUPPORT
static int
zfs_dev_init(void)
{
struct vtoc8 vtoc;
char devname[512];
spa_t *spa;
vdev_t *vdev;
uint64_t guid;
int fd, part, unit;
zfs_init();
guid = 0;
/* Get the GUID of the ZFS pool on the boot device. */
fd = open(getenv("currdev"), O_RDONLY);
if (fd != -1) {
if (vdev_probe(vdev_read, (void *)(uintptr_t) fd, &spa) == 0)
guid = spa->spa_guid;
close(fd);
}
/* Clean up the environment to let ZFS work. */
while ((vdev = STAILQ_FIRST(&zfs_vdevs)) != NULL) {
STAILQ_REMOVE_HEAD(&zfs_vdevs, v_alllink);
free(vdev);
}
while ((spa = STAILQ_FIRST(&zfs_pools)) != NULL) {
STAILQ_REMOVE_HEAD(&zfs_pools, spa_link);
free(spa);
}
for (unit = 0; unit < MAXBDDEV; unit++) {
/* Find freebsd-zfs slices in the VTOC. */
sprintf(devname, "disk%d:", unit);
fd = open(devname, O_RDONLY);
if (fd == -1)
continue;
lseek(fd, 0, SEEK_SET);
if (read(fd, &vtoc, sizeof(vtoc)) != sizeof(vtoc)) {
close(fd);
continue;
}
close(fd);
for (part = 0; part < 8; part++) {
if (part == 2 || vtoc.part[part].tag !=
VTOC_TAG_FREEBSD_ZFS)
continue;
sprintf(devname, "disk%d:%c", unit, part + 'a');
fd = open(devname, O_RDONLY);
if (fd == -1)
break;
if (vdev_probe(vdev_read, (void*)(uintptr_t) fd, 0))
close(fd);
}
}
if (guid != 0) {
unit = zfs_guid_to_unit(guid);
if (unit >= 0) {
/* Update the environment for ZFS. */
sprintf(devname, "zfs%d", unit);
env_setenv("currdev", EV_VOLATILE, devname,
ofw_setcurrdev, env_nounset);
env_setenv("loaddev", EV_VOLATILE, devname,
env_noset, env_nounset);
}
}
return (0);
}
#endif /* LOADER_ZFS_SUPPORT */
int
main(int (*openfirm)(void *))
{
@ -755,14 +846,6 @@ main(int (*openfirm)(void *))
mmu_ops->tlb_init();
/*
* Initialize devices.
*/
for (dp = devsw; *dp != 0; dp++) {
if ((*dp)->dv_init != 0)
(*dp)->dv_init();
}
/*
* Set up the current device.
*/
@ -780,7 +863,8 @@ main(int (*openfirm)(void *))
* needs to be altered.
*/
if (bootpath[strlen(bootpath) - 2] == ':' &&
bootpath[strlen(bootpath) - 1] == 'f') {
bootpath[strlen(bootpath) - 1] == 'f' &&
strstr(bootpath, "cdrom")) {
bootpath[strlen(bootpath) - 1] = 'a';
printf("Boot path set to %s\n", bootpath);
}
@ -790,6 +874,13 @@ main(int (*openfirm)(void *))
env_setenv("loaddev", EV_VOLATILE, bootpath,
env_noset, env_nounset);
/*
* Initialize devices.
*/
for (dp = devsw; *dp != 0; dp++)
if ((*dp)->dv_init != 0)
(*dp)->dv_init();
printf("\n");
printf("%s, Revision %s\n", bootprog_name, bootprog_rev);
printf("(%s, %s)\n", bootprog_maker, bootprog_date);

13
sys/boot/sparc64/zfsboot/Makefile Normal file
View File

@ -0,0 +1,13 @@
# $FreeBSD$
.PATH: ${.CURDIR}/../boot1
PROGNAME= zfsboot
CFLAGS+= -DZFSBOOT
FILES= zfsboot
CLEANFILES+= zfsboot
zfsboot: boot1
ln -s ${.ALLSRC} ${.TARGET}
.include "${.CURDIR}/../boot1/Makefile"

9
sys/boot/sparc64/zfsloader/Makefile Normal file
View File

@ -0,0 +1,9 @@
# $FreeBSD$
.PATH: ${.CURDIR}/../loader
PROG= zfsloader
NEWVERSWHAT= "ZFS enabled bootstrap loader" sparc64
LOADER_ZFS_SUPPORT=yes
.include "${.CURDIR}/../loader/Makefile"

2
sys/boot/zfs/zfs.c
View File

@ -399,6 +399,7 @@ zfs_guid_to_unit(uint64_t guid)
return (-1);
}
#if defined(__amd64__) || defined(__i386__)
static int
zfs_dev_init(void)
{
@ -441,6 +442,7 @@ zfs_dev_init(void)
return (0);
}
#endif
/*
* Print information about ZFS pools