Date: Sat, 23 May 2009 19:54:18 +0000 (UTC) From: Kip Macy <kmacy@FreeBSD.org> To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-7@freebsd.org Subject: svn commit: r192665 - in stable/7/sys/boot: . common i386 i386/libi386 i386/loader i386/zfsboot zfs Message-ID: <200905231954.n4NJsIKj066434@svn.freebsd.org>
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Author: kmacy Date: Sat May 23 19:54:18 2009 New Revision: 192665 URL: http://svn.freebsd.org/changeset/base/192665 Log: Import ZFS loader support missed in the initial MFC set LOADER_ZFS_SUPPORT=Y in make.conf to enable Added: stable/7/sys/boot/i386/zfsboot/Makefile (contents, props changed) stable/7/sys/boot/i386/zfsboot/zfsldr.S (contents, props changed) stable/7/sys/boot/zfs/Makefile (contents, props changed) stable/7/sys/boot/zfs/zfs.c (contents, props changed) Modified: stable/7/sys/boot/Makefile stable/7/sys/boot/common/bootstrap.h stable/7/sys/boot/i386/Makefile stable/7/sys/boot/i386/libi386/bootinfo32.c stable/7/sys/boot/i386/libi386/devicename.c stable/7/sys/boot/i386/loader/Makefile stable/7/sys/boot/i386/loader/conf.c stable/7/sys/boot/i386/loader/main.c Modified: stable/7/sys/boot/Makefile ============================================================================== --- stable/7/sys/boot/Makefile Sat May 23 19:42:23 2009 (r192664) +++ stable/7/sys/boot/Makefile Sat May 23 19:54:18 2009 (r192665) @@ -17,6 +17,10 @@ SUBDIR+= efi SUBDIR+= ofw .endif +.if defined(LOADER_ZFS_SUPPORT) +SUBDIR+= zfs +.endif + # Pick the machine-dependent subdir based on the target architecture. SUBDIR+= ${MACHINE:S/amd64/i386/:S/sun4v/sparc64/} Modified: stable/7/sys/boot/common/bootstrap.h ============================================================================== --- stable/7/sys/boot/common/bootstrap.h Sat May 23 19:42:23 2009 (r192664) +++ stable/7/sys/boot/common/bootstrap.h Sat May 23 19:54:18 2009 (r192665) @@ -43,6 +43,7 @@ struct devdesc #define DEVT_DISK 1 #define DEVT_NET 2 #define DEVT_CD 3 +#define DEVT_ZFS 4 int d_unit; }; Modified: stable/7/sys/boot/i386/Makefile ============================================================================== --- stable/7/sys/boot/i386/Makefile Sat May 23 19:42:23 2009 (r192664) +++ stable/7/sys/boot/i386/Makefile Sat May 23 19:54:18 2009 (r192665) @@ -1,7 +1,7 @@ # $FreeBSD$ -SUBDIR= mbr pmbr boot0 boot0sio btx boot2 cdboot gptboot kgzldr \ - libi386 libfirewire loader +SUBDIR= mbr pmbr boot0 boot0sio btx boot2 cdboot gptboot zfsboot \ + kgzldr libi386 libfirewire loader # special boot programs, 'self-extracting boot2+loader' SUBDIR+= pxeldr Modified: stable/7/sys/boot/i386/libi386/bootinfo32.c ============================================================================== --- stable/7/sys/boot/i386/libi386/bootinfo32.c Sat May 23 19:42:23 2009 (r192664) +++ stable/7/sys/boot/i386/libi386/bootinfo32.c Sat May 23 19:54:18 2009 (r192665) @@ -183,6 +183,7 @@ bi_load32(char *args, int *howtop, int * break; case DEVT_NET: + case DEVT_ZFS: break; default: Modified: stable/7/sys/boot/i386/libi386/devicename.c ============================================================================== --- stable/7/sys/boot/i386/libi386/devicename.c Sat May 23 19:42:23 2009 (r192664) +++ stable/7/sys/boot/i386/libi386/devicename.c Sat May 23 19:54:18 2009 (r192665) @@ -171,6 +171,7 @@ i386_parsedev(struct i386_devdesc **dev, case DEVT_CD: case DEVT_NET: + case DEVT_ZFS: unit = 0; if (*np && (*np != ':')) { @@ -246,6 +247,7 @@ i386_fmtdev(void *vdev) break; case DEVT_NET: + case DEVT_ZFS: sprintf(buf, "%s%d:", dev->d_dev->dv_name, dev->d_unit); break; } Modified: stable/7/sys/boot/i386/loader/Makefile ============================================================================== --- stable/7/sys/boot/i386/loader/Makefile Sat May 23 19:42:23 2009 (r192664) +++ stable/7/sys/boot/i386/loader/Makefile Sat May 23 19:54:18 2009 (r192665) @@ -15,6 +15,12 @@ CFLAGS+= -DLOADER_FIREWIRE_SUPPORT LIBFIREWIRE= ${.OBJDIR}/../libfirewire/libfirewire.a .endif +# Put LOADER_ZFS_SUPPORT=yes in /etc/make.conf for ZFS support +.if defined(LOADER_ZFS_SUPPORT) +CFLAGS+= -DLOADER_ZFS_SUPPORT +LIBZFS= ${.OBJDIR}/../../zfs/libzfsboot.a +.endif + # Enable PXE TFTP or NFS support, not both. .if defined(LOADER_TFTP_SUPPORT) CFLAGS+= -DLOADER_TFTP_SUPPORT @@ -99,8 +105,8 @@ FILES+= loader.rc # XXX crt0.o needs to be first for pxeboot(8) to work OBJS= ${BTXCRT} -DPADD= ${LIBFICL} ${LIBFIREWIRE} ${LIBI386} ${LIBSTAND} -LDADD= ${LIBFICL} ${LIBFIREWIRE} ${LIBI386} -lstand +DPADD= ${LIBFICL} ${LIBFIREWIRE} ${LIBZFS} ${LIBI386} ${LIBSTAND} +LDADD= ${LIBFICL} ${LIBFIREWIRE} ${LIBZFS} ${LIBI386} -lstand .include <bsd.prog.mk> Modified: stable/7/sys/boot/i386/loader/conf.c ============================================================================== --- stable/7/sys/boot/i386/loader/conf.c Sat May 23 19:42:23 2009 (r192664) +++ stable/7/sys/boot/i386/loader/conf.c Sat May 23 19:54:18 2009 (r192665) @@ -50,6 +50,10 @@ __FBSDID("$FreeBSD$"); extern struct devsw fwohci; #endif +#if defined(LOADER_ZFS_SUPPORT) +extern struct devsw zfs_dev; +#endif + /* Exported for libstand */ struct devsw *devsw[] = { &bioscd, @@ -60,15 +64,25 @@ struct devsw *devsw[] = { #if defined(LOADER_FIREWIRE_SUPPORT) &fwohci, #endif +#if defined(LOADER_ZFS_SUPPORT) + &zfs_dev, +#endif NULL }; +#if defined(LOADER_ZFS_SUPPORT) +extern struct fs_ops zfs_fsops; +#endif + struct fs_ops *file_system[] = { &ufs_fsops, &ext2fs_fsops, &dosfs_fsops, &cd9660_fsops, &splitfs_fsops, +#if defined(LOADER_ZFS_SUPPORT) + &zfs_fsops, +#endif #ifdef LOADER_GZIP_SUPPORT &gzipfs_fsops, #endif Modified: stable/7/sys/boot/i386/loader/main.c ============================================================================== --- stable/7/sys/boot/i386/loader/main.c Sat May 23 19:42:23 2009 (r192664) +++ stable/7/sys/boot/i386/loader/main.c Sat May 23 19:54:18 2009 (r192665) @@ -44,6 +44,7 @@ __FBSDID("$FreeBSD$"); #define KARGS_FLAGS_CD 0x1 #define KARGS_FLAGS_PXE 0x2 +#define KARGS_FLAGS_ZFS 0x4 /* Arguments passed in from the boot1/boot2 loader */ static struct @@ -51,8 +52,13 @@ static struct u_int32_t howto; u_int32_t bootdev; u_int32_t bootflags; - u_int32_t pxeinfo; - u_int32_t res2; + union { + struct { + u_int32_t pxeinfo; + u_int32_t res2; + }; + uint64_t zfspool; + }; u_int32_t bootinfo; } *kargs; @@ -96,7 +102,7 @@ main(void) */ bios_getmem(); -#if defined(LOADER_BZIP2_SUPPORT) || defined(LOADER_FIREWIRE_SUPPORT) || defined(LOADER_GPT_SUPPORT) +#if defined(LOADER_BZIP2_SUPPORT) || defined(LOADER_FIREWIRE_SUPPORT) || defined(LOADER_GPT_SUPPORT) || defined(LOADER_ZFS_SUPPORT) heap_top = PTOV(memtop_copyin); memtop_copyin -= 0x300000; heap_bottom = PTOV(memtop_copyin); @@ -145,6 +151,14 @@ main(void) bc_add(initial_bootdev); } + archsw.arch_autoload = i386_autoload; + archsw.arch_getdev = i386_getdev; + archsw.arch_copyin = i386_copyin; + archsw.arch_copyout = i386_copyout; + archsw.arch_readin = i386_readin; + archsw.arch_isainb = isa_inb; + archsw.arch_isaoutb = isa_outb; + /* * March through the device switch probing for things. */ @@ -172,14 +186,6 @@ main(void) bios_getsmap(); - archsw.arch_autoload = i386_autoload; - archsw.arch_getdev = i386_getdev; - archsw.arch_copyin = i386_copyin; - archsw.arch_copyout = i386_copyout; - archsw.arch_readin = i386_readin; - archsw.arch_isainb = isa_inb; - archsw.arch_isaoutb = isa_outb; - interact(); /* doesn't return */ /* if we ever get here, it is an error */ @@ -252,6 +258,29 @@ extract_currdev(void) i386_setcurrdev, env_nounset); env_setenv("loaddev", EV_VOLATILE, i386_fmtdev(&new_currdev), env_noset, env_nounset); + +#ifdef LOADER_ZFS_SUPPORT + /* + * If we were started from a ZFS-aware boot2, we can work out + * which ZFS pool we are booting from. + */ + if (kargs->bootflags & KARGS_FLAGS_ZFS) { + /* + * Dig out the pool guid and convert it to a 'unit number' + */ + uint64_t guid; + int unit; + char devname[32]; + extern int zfs_guid_to_unit(uint64_t); + + guid = kargs->zfspool; + unit = zfs_guid_to_unit(guid); + if (unit >= 0) { + sprintf(devname, "zfs%d", unit); + setenv("currdev", devname, 1); + } + } +#endif } COMMAND_SET(reboot, "reboot", "reboot the system", command_reboot); Added: stable/7/sys/boot/i386/zfsboot/Makefile ============================================================================== --- /dev/null 00:00:00 1970 (empty, because file is newly added) +++ stable/7/sys/boot/i386/zfsboot/Makefile Sat May 23 19:54:18 2009 (r192665) @@ -0,0 +1,108 @@ +# $FreeBSD$ + +.PATH: ${.CURDIR}/../boot2 + +FILES= zfsboot + +NM?= nm + +# A value of 0x80 enables LBA support. +BOOT_BOOT1_FLAGS?= 0x80 + +BOOT_COMCONSOLE_PORT?= 0x3f8 +BOOT_COMCONSOLE_SPEED?= 9600 +B2SIOFMT?= 0x3 + +REL1= 0x700 +ORG1= 0x7c00 +ORG2= 0x2000 + +CFLAGS= -Os -g \ + -fno-guess-branch-probability \ + -fomit-frame-pointer \ + -fno-unit-at-a-time \ + -mno-align-long-strings \ + -mrtd \ + -mno-mmx -mno-3dnow -mno-sse -mno-sse2 -mno-sse3 \ + -DBOOT2 \ + -DFLAGS=${BOOT_BOOT1_FLAGS} \ + -DSIOPRT=${BOOT_COMCONSOLE_PORT} \ + -DSIOFMT=${B2SIOFMT} \ + -DSIOSPD=${BOOT_COMCONSOLE_SPEED} \ + -I${.CURDIR}/../../zfs \ + -I${.CURDIR}/../../../cddl/boot/zfs \ + -I${.CURDIR}/../btx/lib -I. \ + -I${.CURDIR}/../boot2 \ + -Wall -Waggregate-return -Wbad-function-cast -Wcast-align \ + -Wmissing-declarations -Wmissing-prototypes -Wnested-externs \ + -Wpointer-arith -Wshadow -Wstrict-prototypes -Wwrite-strings \ + -Winline --param max-inline-insns-single=100 + +LDFLAGS=-static -N --gc-sections + +# Pick up ../Makefile.inc early. +.include <bsd.init.mk> + +CLEANFILES= zfsboot + +zfsboot: zfsboot1 zfsboot2 + cat zfsboot1 zfsboot2 > zfsboot + +CLEANFILES+= zfsboot1 zfsldr.out zfsldr.o + +zfsboot1: zfsldr.out + objcopy -S -O binary zfsldr.out ${.TARGET} + +zfsldr.out: zfsldr.o + ${LD} ${LDFLAGS} -e start -Ttext ${ORG1} -o ${.TARGET} zfsldr.o + +CLEANFILES+= zfsboot2 zfsboot.ld zfsboot.ldr zfsboot.bin zfsboot.out \ + zfsboot.o zfsboot.s zfsboot.s.tmp zfsboot.h sio.o + +# We currently allow 32768 bytes for zfsboot - in practice it could be +# any size up to 3.5Mb but keeping it fixed size simplifies zfsldr. +# +BOOT2SIZE= 32768 + +zfsboot2: zfsboot.ld + @set -- `ls -l zfsboot.ld`; x=$$((${BOOT2SIZE}-$$5)); \ + echo "$$x bytes available"; test $$x -ge 0 + dd if=zfsboot.ld of=${.TARGET} obs=${BOOT2SIZE} conv=osync + +zfsboot.ld: zfsboot.ldr zfsboot.bin ${BTXKERN} + btxld -v -E ${ORG2} -f bin -b ${BTXKERN} -l zfsboot.ldr \ + -o ${.TARGET} -P 1 zfsboot.bin + +zfsboot.ldr: + cp /dev/null ${.TARGET} + +zfsboot.bin: zfsboot.out + objcopy -S -O binary zfsboot.out ${.TARGET} + +zfsboot.out: ${BTXCRT} zfsboot.o sio.o + ${LD} ${LDFLAGS} -Ttext ${ORG2} -o ${.TARGET} ${.ALLSRC} ${LIBSTAND} + +zfsboot.o: zfsboot.s + +SRCS= zfsboot.c zfsboot.h + +zfsboot.s: zfsboot.c zfsboot.h ${.CURDIR}/../../zfs/zfsimpl.c + ${CC} ${CFLAGS} -S -o zfsboot.s.tmp ${.CURDIR}/zfsboot.c + sed -e '/align/d' -e '/nop/d' < zfsboot.s.tmp > zfsboot.s + rm -f zfsboot.s.tmp + +zfsboot.h: zfsldr.out + ${NM} -t d ${.ALLSRC} | awk '/([0-9])+ T xread/ \ + { x = $$1 - ORG1; \ + printf("#define XREADORG %#x\n", REL1 + x) }' \ + ORG1=`printf "%d" ${ORG1}` \ + REL1=`printf "%d" ${REL1}` > ${.TARGET} + +.if ${MACHINE_ARCH} == "amd64" +beforedepend zfsboot.s: machine +CLEANFILES+= machine +machine: + ln -sf ${.CURDIR}/../../../i386/include machine +.endif + +.include <bsd.prog.mk> Added: stable/7/sys/boot/i386/zfsboot/zfsldr.S ============================================================================== --- /dev/null 00:00:00 1970 (empty, because file is newly added) +++ stable/7/sys/boot/i386/zfsboot/zfsldr.S Sat May 23 19:54:18 2009 (r192665) @@ -0,0 +1,402 @@ +/* + * Copyright (c) 1998 Robert Nordier + * All rights reserved. + * + * Redistribution and use in source and binary forms are freely + * permitted provided that the above copyright notice and this + * paragraph and the following disclaimer are duplicated in all + * such forms. + * + * This software is provided "AS IS" and without any express or + * implied warranties, including, without limitation, the implied + * warranties of merchantability and fitness for a particular + * purpose. + * + * $FreeBSD$ + */ + +/* Memory Locations */ + .set MEM_REL,0x700 # Relocation address + .set MEM_ARG,0x900 # Arguments + .set MEM_ORG,0x7c00 # Origin + .set MEM_BUF,0x8000 # Load area + .set MEM_BTX,0x9000 # BTX start + .set MEM_JMP,0x9010 # BTX entry point + .set MEM_USR,0xa000 # Client start + .set BDA_BOOT,0x472 # Boot howto flag + +/* Partition Constants */ + .set PRT_OFF,0x1be # Partition offset + .set PRT_NUM,0x4 # Partitions + .set PRT_BSD,0xa5 # Partition type + +/* Flag Bits */ + .set FL_PACKET,0x80 # Packet mode + +/* Misc. Constants */ + .set SIZ_PAG,0x1000 # Page size + .set SIZ_SEC,0x200 # Sector size + + .set NSECT,0x40 + .globl start + .globl xread + .code16 + +start: jmp main # Start recognizably + +/* + * This is the start of a standard BIOS Parameter Block (BPB). Most bootable + * FAT disks have this at the start of their MBR. While normal BIOS's will + * work fine without this section, IBM's El Torito emulation "fixes" up the + * BPB by writing into the memory copy of the MBR. Rather than have data + * written into our xread routine, we'll define a BPB to work around it. + * The data marked with (T) indicates a field required for a ThinkPad to + * recognize the disk and (W) indicates fields written from IBM BIOS code. + * The use of the BPB is based on what OpenBSD and NetBSD implemented in + * their boot code but the required fields were determined by trial and error. + * + * Note: If additional space is needed in boot1, one solution would be to + * move the "prompt" message data (below) to replace the OEM ID. + */ + .org 0x03, 0x00 +oemid: .space 0x08, 0x00 # OEM ID + + .org 0x0b, 0x00 +bpb: .word 512 # sector size (T) + .byte 0 # sectors/clustor + .word 0 # reserved sectors + .byte 0 # number of FATs + .word 0 # root entries + .word 0 # small sectors + .byte 0 # media type (W) + .word 0 # sectors/fat + .word 18 # sectors per track (T) + .word 2 # number of heads (T) + .long 0 # hidden sectors (W) + .long 0 # large sectors + + .org 0x24, 0x00 +ebpb: .byte 0 # BIOS physical drive number (W) + + .org 0x25,0x90 +/* + * Trampoline used by boot2 to call read to read data from the disk via + * the BIOS. Call with: + * + * %cx:%ax - long - LBA to read in + * %es:(%bx) - caddr_t - buffer to read data into + * %dl - byte - drive to read from + * %dh - byte - num sectors to read + */ + +xread: push %ss # Address + pop %ds # data +/* + * Setup an EDD disk packet and pass it to read + */ +xread.1: # Starting + pushl $0x0 # absolute + push %cx # block + push %ax # number + push %es # Address of + push %bx # transfer buffer + xor %ax,%ax # Number of + movb %dh,%al # blocks to + push %ax # transfer + push $0x10 # Size of packet + mov %sp,%bp # Packet pointer + callw read # Read from disk + lea 0x10(%bp),%sp # Clear stack + lret # To far caller +/* + * Load the rest of boot2 and BTX up, copy the parts to the right locations, + * and start it all up. + */ + +/* + * Setup the segment registers to flat addressing (segment 0) and setup the + * stack to end just below the start of our code. + */ +main: cld # String ops inc + xor %cx,%cx # Zero + mov %cx,%es # Address + mov %cx,%ds # data + mov %cx,%ss # Set up + mov $start,%sp # stack +/* + * Relocate ourself to MEM_REL. Since %cx == 0, the inc %ch sets + * %cx == 0x100. + */ + mov %sp,%si # Source + mov $MEM_REL,%di # Destination + incb %ch # Word count + rep # Copy + movsw # code +/* + * If we are on a hard drive, then load the MBR and look for the first + * FreeBSD slice. We use the fake partition entry below that points to + * the MBR when we call nread. The first pass looks for the first active + * FreeBSD slice. The second pass looks for the first non-active FreeBSD + * slice if the first one fails. + */ + mov $part4,%si # Partition + cmpb $0x80,%dl # Hard drive? + jb main.4 # No + movb $0x1,%dh # Block count + callw nread # Read MBR + mov $0x1,%cx # Two passes +main.1: mov $MEM_BUF+PRT_OFF,%si # Partition table + movb $0x1,%dh # Partition +main.2: cmpb $PRT_BSD,0x4(%si) # Our partition type? + jne main.3 # No + jcxz main.5 # If second pass + testb $0x80,(%si) # Active? + jnz main.5 # Yes +main.3: add $0x10,%si # Next entry + incb %dh # Partition + cmpb $0x1+PRT_NUM,%dh # In table? + jb main.2 # Yes + dec %cx # Do two + jcxz main.1 # passes +/* + * If we get here, we didn't find any FreeBSD slices at all, so print an + * error message and die. + */ + mov $msg_part,%si # Message + jmp error # Error +/* + * Floppies use partition 0 of drive 0. + */ +main.4: xor %dx,%dx # Partition:drive + +/* + * Ok, we have a slice and drive in %dx now, so use that to locate and + * load boot2. %si references the start of the slice we are looking + * for, so go ahead and load up the 64 sectors starting at sector 1024 + * (i.e. after the two vdev labels). We don't have do anything fancy + * here to allow for an extra copy of boot1 and a partition table + * (compare to this section of the UFS bootstrap) so we just load it + * all at 0x8000. The first part of boot2 is BTX, which wants to run + * at 0x9000. The boot2.bin binary starts right after the end of BTX, + * so we have to figure out where the start of it is and then move the + * binary to 0xc000. After we have moved the client, we relocate BTX + * itself to 0x9000 - doing it in this order means that none of the + * memcpy regions overlap which would corrupt the copy. Normally, BTX + * clients start at MEM_USR, or 0xa000, but when we use btxld to + * create boot2, we use an entry point of 0x2000. That entry point is + * relative to MEM_USR; thus boot2.bin starts at 0xc000. + * + * The load area and the target area for the client overlap so we have + * to use a decrementing string move. We also play segment register + * games with the destination address for the move so that the client + * can be larger than 16k (which would overflow the zero segment since + * the client starts at 0xc000). Relocating BTX is easy since the load + * area and target area do not overlap. + */ +main.5: mov %dx,MEM_ARG # Save args + movb $NSECT,%dh # Sector count + movw $1024,%ax # Offset to boot2 + callw nread.1 # Read disk +main.6: mov $MEM_BUF,%si # BTX (before reloc) + mov 0xa(%si),%bx # Get BTX length and set + mov $NSECT*SIZ_SEC-1,%di # Size of load area (less one) + mov %di,%si # End of load + add $MEM_BUF,%si # area + sub %bx,%di # End of client, 0xc000 rel + mov %di,%cx # Size of + inc %cx # client + mov $(MEM_USR+2*SIZ_PAG)>>4,%dx # Segment + mov %dx,%es # addressing 0xc000 + std # Move with decrement + rep # Relocate + movsb # client + mov %ds,%dx # Back to + mov %dx,%es # zero segment + mov $MEM_BUF,%si # BTX (before reloc) + mov $MEM_BTX,%di # BTX + mov %bx,%cx # Get BTX length + cld # Increment this time + rep # Relocate + movsb # BTX + +/* + * Enable A20 so we can access memory above 1 meg. + * Use the zero-valued %cx as a timeout for embedded hardware which do not + * have a keyboard controller. + */ +seta20: cli # Disable interrupts +seta20.1: dec %cx # Timeout? + jz seta20.3 # Yes + inb $0x64,%al # Get status + testb $0x2,%al # Busy? + jnz seta20.1 # Yes + movb $0xd1,%al # Command: Write + outb %al,$0x64 # output port +seta20.2: inb $0x64,%al # Get status + testb $0x2,%al # Busy? + jnz seta20.2 # Yes + movb $0xdf,%al # Enable + outb %al,$0x60 # A20 +seta20.3: sti # Enable interrupts + + jmp start+MEM_JMP-MEM_ORG # Start BTX + + +/* + * Trampoline used to call read from within boot1. + */ +nread: xor %ax,%ax # Sector offset in partition +nread.1: mov $MEM_BUF,%bx # Transfer buffer + add 0x8(%si),%ax # Get + mov 0xa(%si),%cx # LBA + push %cs # Read from + callw xread.1 # disk + jnc return # If success, return + mov $msg_read,%si # Otherwise, set the error + # message and fall through to + # the error routine +/* + * Print out the error message pointed to by %ds:(%si) followed + * by a prompt, wait for a keypress, and then reboot the machine. + */ +error: callw putstr # Display message + mov $prompt,%si # Display + callw putstr # prompt + xorb %ah,%ah # BIOS: Get + int $0x16 # keypress + movw $0x1234, BDA_BOOT # Do a warm boot + ljmp $0xffff,$0x0 # reboot the machine +/* + * Display a null-terminated string using the BIOS output. + */ +putstr.0: mov $0x7,%bx # Page:attribute + movb $0xe,%ah # BIOS: Display + int $0x10 # character +putstr: lodsb # Get char + testb %al,%al # End of string? + jne putstr.0 # No + +/* + * Overused return code. ereturn is used to return an error from the + * read function. Since we assume putstr succeeds, we (ab)use the + * same code when we return from putstr. + */ +ereturn: movb $0x1,%ah # Invalid + stc # argument +return: retw # To caller +/* + * Reads sectors from the disk. If EDD is enabled, then check if it is + * installed and use it if it is. If it is not installed or not enabled, then + * fall back to using CHS. Since we use a LBA, if we are using CHS, we have to + * fetch the drive parameters from the BIOS and divide it out ourselves. + * Call with: + * + * %dl - byte - drive number + * stack - 10 bytes - EDD Packet + */ +read: testb $FL_PACKET,%cs:MEM_REL+flags-start # LBA support enabled? + jz read.1 # No, use CHS + cmpb $0x80,%dl # Hard drive? + jb read.1 # No, use CHS + mov $0x55aa,%bx # Magic + push %dx # Save + movb $0x41,%ah # BIOS: Check + int $0x13 # extensions present + pop %dx # Restore + jc read.1 # If error, use CHS + cmp $0xaa55,%bx # Magic? + jne read.1 # No, so use CHS + testb $0x1,%cl # Packet interface? + jz read.1 # No, so use CHS + mov %bp,%si # Disk packet + movb $0x42,%ah # BIOS: Extended + int $0x13 # read + retw # To caller +#if 0 +read.1: push %dx # Save + movb $0x8,%ah # BIOS: Get drive + int $0x13 # parameters + movb %dh,%ch # Max head number + pop %dx # Restore + jc return # If error + andb $0x3f,%cl # Sectors per track + jz ereturn # If zero + cli # Disable interrupts + mov 0x8(%bp),%eax # Get LBA + push %dx # Save + movzbl %cl,%ebx # Divide by + xor %edx,%edx # sectors + div %ebx # per track + movb %ch,%bl # Max head number + movb %dl,%ch # Sector number + inc %bx # Divide by + xorb %dl,%dl # number + div %ebx # of heads + movb %dl,%bh # Head number + pop %dx # Restore + cmpl $0x3ff,%eax # Cylinder number supportable? + sti # Enable interrupts + ja ereturn # No, return an error + xchgb %al,%ah # Set up cylinder + rorb $0x2,%al # number + orb %ch,%al # Merge + inc %ax # sector + xchg %ax,%cx # number + movb %bh,%dh # Head number + subb %ah,%al # Sectors this track + mov 0x2(%bp),%ah # Blocks to read + cmpb %ah,%al # To read + jb read.2 # this +#ifdef TRACK_AT_A_TIME + movb %ah,%al # track +#else + movb $1,%al # one sector +#endif +read.2: mov $0x5,%di # Try count +read.3: les 0x4(%bp),%bx # Transfer buffer + push %ax # Save + movb $0x2,%ah # BIOS: Read + int $0x13 # from disk + pop %bx # Restore + jnc read.4 # If success + dec %di # Retry? + jz read.6 # No + xorb %ah,%ah # BIOS: Reset + int $0x13 # disk system + xchg %bx,%ax # Block count + jmp read.3 # Continue +read.4: movzbw %bl,%ax # Sectors read + add %ax,0x8(%bp) # Adjust + jnc read.5 # LBA, + incw 0xa(%bp) # transfer +read.5: shlb %bl # buffer + add %bl,0x5(%bp) # pointer, + sub %al,0x2(%bp) # block count + ja read.1 # If not done +read.6: retw # To caller +#else +read.1: mov $msg_chs,%si + jmp error +msg_chs: .asciz "CHS not supported" +#endif + +/* Messages */ + +msg_read: .asciz "Read" +msg_part: .asciz "Boot" + +prompt: .asciz " error\r\n" + +flags: .byte FLAGS # Flags + + .org PRT_OFF,0x90 + +/* Partition table */ + + .fill 0x30,0x1,0x0 +part4: .byte 0x80, 0x00, 0x01, 0x00 + .byte 0xa5, 0xfe, 0xff, 0xff + .byte 0x00, 0x00, 0x00, 0x00 + .byte 0x50, 0xc3, 0x00, 0x00 # 50000 sectors long, bleh + + .word 0xaa55 # Magic number Added: stable/7/sys/boot/zfs/Makefile ============================================================================== --- /dev/null 00:00:00 1970 (empty, because file is newly added) +++ stable/7/sys/boot/zfs/Makefile Sat May 23 19:54:18 2009 (r192665) @@ -0,0 +1,39 @@ +# $FreeBSD$ + +LIB= zfsboot +INTERNALLIB= + +SRCS+= zfs.c + +CFLAGS+= -I${.CURDIR}/../common -I${.CURDIR}/../.. -I. +CFLAGS+= -I${.CURDIR}/../../../lib/libstand +CFLAGS+= -I${.CURDIR}/../../cddl/boot/zfs + +CFLAGS+= -ffreestanding +.if ${MACHINE_ARCH} == "i386" || ${MACHINE_ARCH} == "amd64" +CFLAGS+= -mpreferred-stack-boundary=2 +CFLAGS+= -mno-mmx -mno-3dnow -mno-sse -mno-sse2 +.endif +.if ${MACHINE_ARCH} == "i386" +CFLAGS+= -mno-sse3 +.endif +.if ${MACHINE_ARCH} == "powerpc" || ${MACHINE_ARCH} == "arm" +CFLAGS+= -msoft-float +.endif +.if ${MACHINE_ARCH} == "amd64" +CFLAGS+= -m32 -march=i386 +.endif + +CFLAGS+= -Wformat -Wall + +.if ${MACHINE_ARCH} == "amd64" +CLEANFILES+= machine +machine: + ln -sf ${.CURDIR}/../../i386/include machine +.endif + +.include <bsd.lib.mk> + +.if ${MACHINE_ARCH} == "amd64" +beforedepend ${OBJS}: machine +.endif Added: stable/7/sys/boot/zfs/zfs.c ============================================================================== --- /dev/null 00:00:00 1970 (empty, because file is newly added) +++ stable/7/sys/boot/zfs/zfs.c Sat May 23 19:54:18 2009 (r192665) @@ -0,0 +1,518 @@ +/*- + * Copyright (c) 2007 Doug Rabson + * 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 <sys/cdefs.h> +__FBSDID("$FreeBSD$"); + +/* + * Stand-alone file reading package. + */ + +#include <sys/param.h> +#include <sys/disklabel.h> +#include <sys/time.h> +#include <sys/queue.h> +#include <stddef.h> +#include <stdarg.h> +#include <string.h> +#include <stand.h> +#include <bootstrap.h> + +#include "zfsimpl.c" + +static int zfs_open(const char *path, struct open_file *f); +static int zfs_write(struct open_file *f, void *buf, size_t size, size_t *resid); +static int zfs_close(struct open_file *f); +static int zfs_read(struct open_file *f, void *buf, size_t size, size_t *resid); +static off_t zfs_seek(struct open_file *f, off_t offset, int where); +static int zfs_stat(struct open_file *f, struct stat *sb); +static int zfs_readdir(struct open_file *f, struct dirent *d); + +struct devsw zfs_dev; + +struct fs_ops zfs_fsops = { + "zfs", + zfs_open, + zfs_close, + zfs_read, + zfs_write, + zfs_seek, + zfs_stat, + zfs_readdir +}; + +/* + * In-core open file. + */ +struct file { + off_t f_seekp; /* seek pointer */ + dnode_phys_t f_dnode; + uint64_t f_zap_type; /* zap type for readdir */ + uint64_t f_num_leafs; /* number of fzap leaf blocks */ + zap_leaf_phys_t *f_zap_leaf; /* zap leaf buffer */ +}; + +/* + * Open a file. + */ +static int +zfs_open(const char *upath, struct open_file *f) +{ + spa_t *spa = (spa_t *) f->f_devdata; + struct file *fp; + int rc; + + if (f->f_dev != &zfs_dev) + return (EINVAL); + + rc = zfs_mount_pool(spa); + if (rc) + return (rc); + + /* allocate file system specific data structure */ + fp = malloc(sizeof(struct file)); + bzero(fp, sizeof(struct file)); + f->f_fsdata = (void *)fp; + + if (spa->spa_root_objset.os_type != DMU_OST_ZFS) { + printf("Unexpected object set type %lld\n", + spa->spa_root_objset.os_type); + rc = EIO; + goto out; + } + + rc = zfs_lookup(spa, upath, &fp->f_dnode); + if (rc) + goto out; + + fp->f_seekp = 0; +out: + if (rc) { + f->f_fsdata = NULL; + free(fp); + } + return (rc); +} + +static int +zfs_close(struct open_file *f) +{ + struct file *fp = (struct file *)f->f_fsdata; + + dnode_cache_obj = 0; + f->f_fsdata = (void *)0; + if (fp == (struct file *)0) + return (0); + + free(fp); + return (0); +} + +/* + * Copy a portion of a file into kernel memory. + * Cross block boundaries when necessary. + */ +static int +zfs_read(struct open_file *f, void *start, size_t size, size_t *resid /* out */) +{ + spa_t *spa = (spa_t *) f->f_devdata; + struct file *fp = (struct file *)f->f_fsdata; + const znode_phys_t *zp = (const znode_phys_t *) fp->f_dnode.dn_bonus; + size_t n; + int rc; + + n = size; + if (fp->f_seekp + n > zp->zp_size) + n = zp->zp_size - fp->f_seekp; + + rc = dnode_read(spa, &fp->f_dnode, fp->f_seekp, start, n); + if (rc) + return (rc); + + if (0) { + int i; + for (i = 0; i < n; i++) + putchar(((char*) start)[i]); + } + fp->f_seekp += n; + if (resid) + *resid = size - n; + + return (0); +} + +/* + * Don't be silly - the bootstrap has no business writing anything. + */ +static int +zfs_write(struct open_file *f, void *start, size_t size, size_t *resid /* out */) +{ + + return (EROFS); +} + +static off_t +zfs_seek(struct open_file *f, off_t offset, int where) +{ + struct file *fp = (struct file *)f->f_fsdata; + znode_phys_t *zp = (znode_phys_t *) fp->f_dnode.dn_bonus; + + switch (where) { + case SEEK_SET: + fp->f_seekp = offset; + break; + case SEEK_CUR: + fp->f_seekp += offset; + break; + case SEEK_END: + fp->f_seekp = zp->zp_size - offset; + break; + default: + errno = EINVAL; + return (-1); + } + return (fp->f_seekp); +} + +static int +zfs_stat(struct open_file *f, struct stat *sb) +{ + struct file *fp = (struct file *)f->f_fsdata; + znode_phys_t *zp = (znode_phys_t *) fp->f_dnode.dn_bonus; + + /* only important stuff */ + sb->st_mode = zp->zp_mode; + sb->st_uid = zp->zp_uid; + sb->st_gid = zp->zp_gid; + sb->st_size = zp->zp_size; + + return (0); +} + *** DIFF OUTPUT TRUNCATED AT 1000 LINES ***
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