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* Patch by Pavel Bartusek, 21 Mar 2004

Browse Source 
Add Reiserfs support

* Patch by Hinko Kocevar, 20 Mar 2004
  - Add auto-release for SMSC LAN91c111 driver
  - Add save/restore of PTR and PNR regs as suggested in datasheet
master
wdenk 21 years ago
parent 6fb6af6dc9
commit 518e2e1ae3
15 changed files with 2239 additions and 8 deletions
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
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  1. 7
      CHANGELOG
  2. 5
      CREDITS
  3. 3
      Makefile
  4. 2
      common/Makefile
  5. 277
      common/cmd_reiser.c
  6. 42
      drivers/smc91111.c
  7. 3
      drivers/smc91111.h
  8. 2
      fs/Makefile
  9. 48
      fs/reiserfs/Makefile
  10. 123
      fs/reiserfs/dev.c
  11. 143
      fs/reiserfs/mode_string.c
  12. 986
      fs/reiserfs/reiserfs.c
  13. 521
      fs/reiserfs/reiserfs_private.h
  14. 2
      include/cmd_confdefs.h
  15. 83
      include/reiserfs.h

7
CHANGELOG
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@ -2,6 +2,13 @@
Changes for U-Boot 1.0.2:
======================================================================
* Patch by Pavel Bartusek, 21 Mar 2004
Add Reiserfs support
* Patch by Hinko Kocevar, 20 Mar 2004
- Add auto-release for SMSC LAN91c111 driver
- Add save/restore of PTR and PNR regs as suggested in datasheet
* Patch by Stephen Williams, 19 March 2004
Increase speed of sector reads from SystemACE,
shorten poll timeout and remove a useless reset

5
CREDITS
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@ -38,6 +38,11 @@ N: Jerry van Baren
E: <vanbaren@cideas.com>
D: BedBug port to 603e core (MPC82xx). Code for enhanced memory test.
N: Pavel Bartusek
E: <pba@sysgo.com>
D: Reiserfs support
W: http://www.elinos.com
N: Andre Beaudin
E: <andre.beaudin@colubris.com>
D: PCMCIA, Ethernet, TFTP

3
Makefile
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@ -99,7 +99,8 @@ LIBS = lib_generic/libgeneric.a
LIBS += board/$(BOARDDIR)/lib$(BOARD).a
LIBS += cpu/$(CPU)/lib$(CPU).a
LIBS += lib_$(ARCH)/lib$(ARCH).a
LIBS += fs/cramfs/libcramfs.a fs/fat/libfat.a fs/fdos/libfdos.a fs/jffs2/libjffs2.a
LIBS += fs/cramfs/libcramfs.a fs/fat/libfat.a fs/fdos/libfdos.a fs/jffs2/libjffs2.a \
fs/reiserfs/libreiserfs.a
LIBS += net/libnet.a
LIBS += disk/libdisk.a
LIBS += rtc/librtc.a

2
common/Makefile
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@ -39,7 +39,7 @@ COBJS = main.o ACEX1K.o altera.o bedbug.o \
cmd_mem.o cmd_mii.o cmd_misc.o cmd_mmc.o \
cmd_nand.o cmd_net.o cmd_nvedit.o \
cmd_pci.o cmd_pcmcia.o cmd_portio.o \
cmd_reginfo.o cmd_scsi.o cmd_spi.o cmd_usb.o cmd_vfd.o \
cmd_reginfo.o cmd_reiser.o cmd_scsi.o cmd_spi.o cmd_usb.o cmd_vfd.o \
command.o console.o devices.o dlmalloc.o docecc.o \
environment.o env_common.o \
env_dataflash.o env_flash.o env_eeprom.o env_nvram.o env_nowhere.o exports.o \

277
common/cmd_reiser.c
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@ -0,0 +1,277 @@
/*
* (C) Copyright 2003 - 2004
* Sysgo Real-Time Solutions, AG <www.elinos.com>
* Pavel Bartusek <pba@sysgo.com>
*
* See file CREDITS for list of people who contributed to this
* project.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of
* the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307 USA
*
*/
/*
* Reiserfs support
*/
#include <common.h>
#if (CONFIG_COMMANDS & CFG_CMD_REISER)
#include <config.h>
#include <command.h>
#include <image.h>
#include <linux/ctype.h>
#include <asm/byteorder.h>
#include <reiserfs.h>
#ifndef CONFIG_DOS_PARTITION
#error DOS partition support must be selected
#endif
/* #define REISER_DEBUG */
#ifdef REISER_DEBUG
#define PRINTF(fmt,args...) printf (fmt ,##args)
#else
#define PRINTF(fmt,args...)
#endif
static block_dev_desc_t *get_dev (char* ifname, int dev)
{
#if (CONFIG_COMMANDS & CFG_CMD_IDE)
if (strncmp(ifname,"ide",3)==0) {
extern block_dev_desc_t * ide_get_dev(int dev);
return((dev >= CFG_IDE_MAXDEVICE) ? NULL : ide_get_dev(dev));
}
#endif
#if (CONFIG_COMMANDS & CFG_CMD_SCSI)
if (strncmp(ifname,"scsi",4)==0) {
extern block_dev_desc_t * scsi_get_dev(int dev);
return((dev >= CFG_SCSI_MAXDEVICE) ? NULL : scsi_get_dev(dev));
}
#endif
#if ((CONFIG_COMMANDS & CFG_CMD_USB) && defined(CONFIG_USB_STORAGE))
if (strncmp(ifname,"usb",3)==0) {
extern block_dev_desc_t * usb_stor_get_dev(int dev);
return((dev >= USB_MAX_STOR_DEV) ? NULL : usb_stor_get_dev(dev));
}
#endif
#if defined(CONFIG_MMC)
if (strncmp(ifname,"mmc",3)==0) {
extern block_dev_desc_t * mmc_get_dev(int dev);
return((dev >= 1) ? NULL : mmc_get_dev(dev));
}
#endif
#if defined(CONFIG_SYSTEMACE)
if (strcmp(ifname,"ace")==0) {
extern block_dev_desc_t * systemace_get_dev(int dev);
return((dev >= 1) ? NULL : systemace_get_dev(dev));
}
#endif
return NULL;
}
int do_reiserls (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
{
char *filename = "/";
int dev=0;
int part=1;
char *ep;
block_dev_desc_t *dev_desc=NULL;
int part_length;
if (argc < 3) {
printf ("Usage:\n%s\n", cmdtp->usage);
return 1;
}
dev = (int)simple_strtoul (argv[2], &ep, 16);
dev_desc=get_dev(argv[1],dev);
if (dev_desc == NULL) {
printf ("\n** Block device %s %d not supported\n", argv[1], dev);
return 1;
}
if (*ep) {
if (*ep != ':') {
puts ("\n** Invalid boot device, use `dev[:part]' **\n");
return 1;
}
part = (int)simple_strtoul(++ep, NULL, 16);
}
if (argc == 4) {
filename = argv[3];
}
PRINTF("Using device %s %d:%d, directory: %s\n", argv[1], dev, part, filename);
if ((part_length = reiserfs_set_blk_dev(dev_desc, part)) == 0) {
printf ("** Bad partition - %s %d:%d **\n", argv[1], dev, part);
return 1;
}
if (!reiserfs_mount(part_length)) {
printf ("** Bad Reisefs partition or disk - %s %d:%d **\n", argv[1], dev, part);
return 1;
}
if (reiserfs_ls (filename)) {
printf ("** Error reiserfs_ls() **\n");
return 1;
};
return 0;
}
U_BOOT_CMD(
reiserls, 4, 1, do_reiserls,
"reiserls- list files in a directory (default /)\n",
"<interface> <dev[:part]> [directory]\n"
" - list files from 'dev' on 'interface' in a 'directory'\n"
);
/******************************************************************************
* Reiserfs boot command intepreter. Derived from diskboot
*/
int do_reiserload (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
{
char *filename = NULL;
char *ep;
int dev, part = 0;
ulong addr = 0, part_length, filelen;
disk_partition_t info;
block_dev_desc_t *dev_desc = NULL;
char buf [12];
unsigned long count;
char *addr_str;
switch (argc) {
case 3:
addr_str = getenv("loadaddr");
if (addr_str != NULL) {
addr = simple_strtoul (addr_str, NULL, 16);
} else {
addr = CFG_LOAD_ADDR;
}
filename = getenv ("bootfile");
count = 0;
break;
case 4:
addr = simple_strtoul (argv[3], NULL, 16);
filename = getenv ("bootfile");
count = 0;
break;
case 5:
addr = simple_strtoul (argv[3], NULL, 16);
filename = argv[4];
count = 0;
break;
case 6:
addr = simple_strtoul (argv[3], NULL, 16);
filename = argv[4];
count = simple_strtoul (argv[5], NULL, 16);
break;
default:
printf ("Usage:\n%s\n", cmdtp->usage);
return 1;
}
if (!filename) {
puts ("\n** No boot file defined **\n");
return 1;
}
dev = (int)simple_strtoul (argv[2], &ep, 16);
dev_desc=get_dev(argv[1],dev);
if (dev_desc==NULL) {
printf ("\n** Block device %s %d not supported\n", argv[1], dev);
return 1;
}
if (*ep) {
if (*ep != ':') {
puts ("\n** Invalid boot device, use `dev[:part]' **\n");
return 1;
}
part = (int)simple_strtoul(++ep, NULL, 16);
}
PRINTF("Using device %s%d, partition %d\n", argv[1], dev, part);
if (part != 0) {
if (get_partition_info (&dev_desc[dev], part, &info)) {
printf ("** Bad partition %d **\n", part);
return 1;
}
if (strncmp(info.type, BOOT_PART_TYPE, sizeof(info.type)) != 0) {
printf ("\n** Invalid partition type \"%.32s\""
" (expect \"" BOOT_PART_TYPE "\")\n",
info.type);
return 1;
}
PRINTF ("\nLoading from block device %s device %d, partition %d: "
"Name: %.32s Type: %.32s File:%s\n",
argv[1], dev, part, info.name, info.type, filename);
} else {
PRINTF ("\nLoading from block device %s device %d, File:%s\n",
argv[1], dev, filename);
}
if ((part_length = reiserfs_set_blk_dev(dev_desc, part)) == 0) {
printf ("** Bad partition - %s %d:%d **\n", argv[1], dev, part);
return 1;
}
if (!reiserfs_mount(part_length)) {
printf ("** Bad Reisefs partition or disk - %s %d:%d **\n", argv[1], dev, part);
return 1;
}
filelen = reiserfs_open(filename);
if (filelen < 0) {
printf("** File not found %s\n", filename);
return 1;
}
if ((count < filelen) && (count != 0)) {
filelen = count;
}
if (reiserfs_read((char *)addr, filelen) != filelen) {
printf("\n** Unable to read \"%s\" from %s %d:%d **\n", filename, argv[1], dev, part);
return 1;
}
/* Loading ok, update default load address */
load_addr = addr;
printf ("\n%ld bytes read\n", filelen);
sprintf(buf, "%lX", filelen);
setenv("filesize", buf);
return filelen;
}
U_BOOT_CMD(
reiserload, 6, 0, do_reiserload,
"reiserload- load binary file from a Reiser filesystem\n",
"<interface> <dev[:part]> [addr] [filename] [bytes]\n"
" - load binary file 'filename' from 'dev' on 'interface'\n"
" to address 'addr' from dos filesystem\n"
);
#endif /* CONFIG_COMMANDS & CFG_CMD_REISER */

42
drivers/smc91111.c
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@ -481,7 +481,13 @@ static int smc_send_packet (volatile void *packet, int packet_length)
int try = 0;
int time_out;
byte status;
byte saved_pnr;
word saved_ptr;
/* save PTR and PNR registers before manipulation */
SMC_SELECT_BANK (2);
saved_pnr = SMC_inb( PN_REG );
saved_ptr = SMC_inw( PTR_REG );
PRINTK3 ("%s:smc_hardware_send_packet\n", SMC_DEV_NAME);
@ -559,6 +565,10 @@ again:
/* we have a packet address, so tell the card to use it */
SMC_outb (packet_no, PN_REG);
/* do not write new ptr value if Write data fifo not empty */
while ( saved_ptr & PTR_NOTEMPTY )
printf ("Write data fifo not empty!\n");
/* point to the beginning of the packet */
SMC_outw (PTR_AUTOINC, PTR_REG);
@ -607,12 +617,15 @@ again:
SMC_outw (MC_ENQUEUE, MMU_CMD_REG);
/* poll for TX INT */
if (poll4int (IM_TX_INT, SMC_TX_TIMEOUT)) {
/* if (poll4int (IM_TX_INT, SMC_TX_TIMEOUT)) { */
/* poll for TX_EMPTY INT - autorelease enabled */
if (poll4int(IM_TX_EMPTY_INT, SMC_TX_TIMEOUT)) {
/* sending failed */
PRINTK2 ("%s: TX timeout, sending failed...\n", SMC_DEV_NAME);
/* release packet */
SMC_outw (MC_FREEPKT, MMU_CMD_REG);
/* no need to release, MMU does that now */
/* SMC_outw (MC_FREEPKT, MMU_CMD_REG); */
/* wait for MMU getting ready (low) */
while (SMC_inw (MMU_CMD_REG) & MC_BUSY) {
@ -625,12 +638,14 @@ again:
return 0;
} else {
/* ack. int */
SMC_outb (IM_TX_INT, SMC91111_INT_REG);
SMC_outb (IM_TX_EMPTY_INT, SMC91111_INT_REG);
/* SMC_outb (IM_TX_INT, SMC91111_INT_REG); */
PRINTK2 ("%s: Sent packet of length %d \n", SMC_DEV_NAME,
length);
/* release packet */
SMC_outw (MC_FREEPKT, MMU_CMD_REG);
/* no need to release, MMU does that now */
/* SMC_outw (MC_FREEPKT, MMU_CMD_REG); */
/* wait for MMU getting ready (low) */
while (SMC_inw (MMU_CMD_REG) & MC_BUSY) {
@ -642,6 +657,10 @@ again:
}
/* restore previously saved registers */
SMC_outb( saved_pnr, PN_REG );
SMC_outw( saved_ptr, PTR_REG );
return length;
}
@ -730,8 +749,14 @@ static int smc_rcv()
#ifdef USE_32_BIT
dword stat_len;
#endif
byte saved_pnr;
word saved_ptr;
SMC_SELECT_BANK(2);
/* save PTR and PTR registers */
saved_pnr = SMC_inb( PN_REG );
saved_ptr = SMC_inw( PTR_REG );
packet_number = SMC_inw( RXFIFO_REG );
if ( packet_number & RXFIFO_REMPTY ) {
@ -810,6 +835,10 @@ static int smc_rcv()
while ( SMC_inw( MMU_CMD_REG ) & MC_BUSY )
udelay(1); /* Wait until not busy */
/* restore saved registers */
SMC_outb( saved_pnr, PN_REG );
SMC_outw( saved_ptr, PTR_REG );
if (!is_error) {
/* Pass the packet up to the protocol layers. */
NetReceive(NetRxPackets[0], packet_length);
@ -1252,6 +1281,11 @@ static void smc_phy_configure ()
/* Update our Auto-Neg Advertisement Register */
smc_write_phy_register (PHY_AD_REG, my_ad_caps);
/* Read the register back. Without this, it appears that when */
/* auto-negotiation is restarted, sometimes it isn't ready and */
/* the link does not come up. */
smc_read_phy_register(PHY_AD_REG);
PRINTK2 ("%s:phy caps=%x\n", SMC_DEV_NAME, my_phy_caps);
PRINTK2 ("%s:phy advertised caps=%x\n", SMC_DEV_NAME, my_ad_caps);

3
drivers/smc91111.h
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@ -378,7 +378,7 @@ typedef unsigned long int dword;
#define CTL_EEPROM_SELECT 0x0004 /* Controls EEPROM reload & store */
#define CTL_RELOAD 0x0002 /* When set reads EEPROM into registers */
#define CTL_STORE 0x0001 /* When set stores registers into EEPROM */
#define CTL_DEFAULT (0x1210)
#define CTL_DEFAULT (0x1A10) /* Autorelease enabled*/
/* MMU Command Register */
/* BANK 2 */
@ -423,6 +423,7 @@ typedef unsigned long int dword;
#define PTR_RCV 0x8000 /* 1=Receive area, 0=Transmit area */
#define PTR_AUTOINC 0x4000 /* Auto increment the pointer on each access */
#define PTR_READ 0x2000 /* When 1 the operation is a read */
#define PTR_NOTEMPTY 0x0800 /* When 1 _do not_ write fifo DATA REG */
/* Data Register */

2
fs/Makefile
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@ -22,7 +22,7 @@
#
#
SUBDIRS := jffs2 cramfs fdos fat
SUBDIRS := jffs2 cramfs fdos fat reiserfs
.depend all:
@for dir in $(SUBDIRS) ; do \

48
fs/reiserfs/Makefile
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@ -0,0 +1,48 @@
#
# (C) Copyright 2003
# Pavel Bartusek, Sysgo Real-Time Solutions AG, pba@sysgo.de
#
#
# See file CREDITS for list of people who contributed to this
# project.
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License as
# published by the Free Software Foundation; either version 2 of
# the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place, Suite 330, Boston,
# MA 02111-1307 USA
#
include $(TOPDIR)/config.mk
LIB = libreiserfs.a
AOBJS =
COBJS = reiserfs.o dev.o mode_string.o
OBJS = $(AOBJS) $(COBJS)
#CPPFLAGS +=
all: $(LIB) $(AOBJS)
$(LIB): .depend $(OBJS)
$(AR) crv $@ $(OBJS)
#########################################################################
.depend: Makefile $(AOBJS:.o=.S) $(COBJS:.o=.c)
$(CC) -M $(CFLAGS) $(AOBJS:.o=.S) $(COBJS:.o=.c) > $@
sinclude .depend
#########################################################################

123
fs/reiserfs/dev.c
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@ -0,0 +1,123 @@
/*
* (C) Copyright 2003 - 2004
* Sysgo AG, <www.elinos.com>, Pavel Bartusek <pba@sysgo.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <common.h>
#if (CONFIG_COMMANDS & CFG_CMD_REISER)
#include <config.h>
#include <reiserfs.h>
#include "reiserfs_private.h"
static block_dev_desc_t *reiserfs_block_dev_desc;
static disk_partition_t part_info;
int reiserfs_set_blk_dev(block_dev_desc_t *rbdd, int part)
{
reiserfs_block_dev_desc = rbdd;
if (part == 0) {
/* disk doesn't use partition table */
part_info.start = 0;
part_info.size = rbdd->lba;
part_info.blksz = rbdd->blksz;
} else {
if (get_partition_info (reiserfs_block_dev_desc, part, &part_info)) {
return 0;
}
}
return (part_info.size);
}
int reiserfs_devread (int sector, int byte_offset, int byte_len, char *buf)
{
char sec_buf[SECTOR_SIZE];
unsigned block_len;
/*
unsigned len = byte_len;
u8 *start = buf;
*/
/*
* Check partition boundaries
*/
if (sector < 0
|| ((sector + ((byte_offset + byte_len - 1) >> SECTOR_BITS))
>= part_info.size)) {
// errnum = ERR_OUTSIDE_PART;
printf (" ** reiserfs_devread() read outside partition\n");
return 0;
}
/*
* Get the read to the beginning of a partition.
*/
sector += byte_offset >> SECTOR_BITS;
byte_offset &= SECTOR_SIZE - 1;
#if defined(DEBUG)
printf (" <%d, %d, %d> ", sector, byte_offset, byte_len);
#endif
if (reiserfs_block_dev_desc == NULL)
return 0;
if (byte_offset != 0) {
/* read first part which isn't aligned with start of sector */
if (reiserfs_block_dev_desc->block_read(reiserfs_block_dev_desc->dev,
part_info.start+sector, 1, (unsigned long *)sec_buf) != 1) {
printf (" ** reiserfs_devread() read error\n");
return 0;
}
memcpy(buf, sec_buf+byte_offset, min(SECTOR_SIZE-byte_offset, byte_len));
buf+=min(SECTOR_SIZE-byte_offset, byte_len);
byte_len-=min(SECTOR_SIZE-byte_offset, byte_len);
sector++;
}
/* read sector aligned part */
block_len = byte_len & ~(SECTOR_SIZE-1);
if (reiserfs_block_dev_desc->block_read(reiserfs_block_dev_desc->dev,
part_info.start+sector, block_len/SECTOR_SIZE, (unsigned long *)buf) !=
block_len/SECTOR_SIZE) {
printf (" ** reiserfs_devread() read error - block\n");
return 0;
}
buf+=block_len;
byte_len-=block_len;
sector+= block_len/SECTOR_SIZE;
if ( byte_len != 0 ) {
/* read rest of data which are not in whole sector */
if (reiserfs_block_dev_desc->block_read(reiserfs_block_dev_desc->dev,
part_info.start+sector, 1, (unsigned long *)sec_buf) != 1) {
printf (" ** reiserfs_devread() read error - last part\n");
return 0;
}
memcpy(buf, sec_buf, byte_len);
}
return 1;
}
#endif /* CFG_CMD_REISERFS */

143
fs/reiserfs/mode_string.c
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@ -0,0 +1,143 @@
/* vi: set sw=4 ts=4: */
/*
* mode_string implementation for busybox
*
* Copyright (C) 2003 Manuel Novoa III <mjn3@codepoet.org>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
/* Aug 13, 2003
* Fix a bug reported by junkio@cox.net involving the mode_chars index.
*/
#include <common.h>
#if (CONFIG_COMMANDS & CFG_CMD_REISER)
#include <linux/stat.h>
#if ( S_ISUID != 04000 ) || ( S_ISGID != 02000 ) || ( S_ISVTX != 01000 ) \
|| ( S_IRUSR != 00400 ) || ( S_IWUSR != 00200 ) || ( S_IXUSR != 00100 ) \
|| ( S_IRGRP != 00040 ) || ( S_IWGRP != 00020 ) || ( S_IXGRP != 00010 ) \
|| ( S_IROTH != 00004 ) || ( S_IWOTH != 00002 ) || ( S_IXOTH != 00001 )
#error permission bitflag value assumption(s) violated!
#endif
#if ( S_IFSOCK!= 0140000 ) || ( S_IFLNK != 0120000 ) \
|| ( S_IFREG != 0100000 ) || ( S_IFBLK != 0060000 ) \
|| ( S_IFDIR != 0040000 ) || ( S_IFCHR != 0020000 ) \
|| ( S_IFIFO != 0010000 )
#warning mode type bitflag value assumption(s) violated! falling back to larger version
#if (S_IRWXU | S_IRWXG | S_IRWXO | S_ISUID | S_ISGID | S_ISVTX) == 07777
#undef mode_t
#define mode_t unsigned short
#endif
static const mode_t mode_flags[] = {
S_IRUSR, S_IWUSR, S_IXUSR, S_ISUID,
S_IRGRP, S_IWGRP, S_IXGRP, S_ISGID,
S_IROTH, S_IWOTH, S_IXOTH, S_ISVTX
};
/* The static const char arrays below are duplicated for the two cases
* because moving them ahead of the mode_flags declaration cause a text
* size increase with the gcc version I'm using. */
/* The previous version used "0pcCd?bB-?l?s???". However, the '0', 'C',
* and 'B' types don't appear to be available on linux. So I removed them. */
static const char type_chars[16] = "?pc?d?b?-?l?s???";
/* 0123456789abcdef */
static const char mode_chars[7] = "rwxSTst";
const char *bb_mode_string(int mode)
{
static char buf[12];
char *p = buf;
int i, j, k;
*p = type_chars[ (mode >> 12) & 0xf ];
i = 0;
do {
j = k = 0;
do {
*++p = '-';
if (mode & mode_flags[i+j]) {
*p = mode_chars[j];
k = j;
}
} while (++j < 3);
if (mode & mode_flags[i+j]) {
*p = mode_chars[3 + (k & 2) + ((i&8) >> 3)];
}
i += 4;
} while (i < 12);
/* Note: We don't bother with nul termination because bss initialization
* should have taken care of that for us. If the user scribbled in buf
* memory, they deserve whatever happens. But we'll at least assert. */
if (buf[10] != 0) return NULL;
return buf;
}
#else
/* The previous version used "0pcCd?bB-?l?s???". However, the '0', 'C',
* and 'B' types don't appear to be available on linux. So I removed them. */
//static const char type_chars[16] = "?pc?d?b?-?l?s???";
static const char type_chars[16] = "?pc?d?b?-?l?s???";
/* 0123456789abcdef */
static const char mode_chars[7] = "rwxSTst";
const char *bb_mode_string(int mode)
{
static char buf[12];
char *p = buf;
int i, j, k, m;
*p = type_chars[ (mode >> 12) & 0xf ];
i = 0;
m = 0400;
do {
j = k = 0;
do {
*++p = '-';
if (mode & m) {
*p = mode_chars[j];
k = j;
}
m >>= 1;
} while (++j < 3);
++i;
if (mode & (010000 >> i)) {
*p = mode_chars[3 + (k & 2) + (i == 3)];
}
} while (i < 3);
/* Note: We don't bother with nul termination because bss initialization
* should have taken care of that for us. If the user scribbled in buf
* memory, they deserve whatever happens. But we'll at least assert. */
if (buf[10] != 0) return NULL;
return buf;
}
#endif
#endif /* CFG_CMD_REISER */

986
fs/reiserfs/reiserfs.c
Unescape View File

@ -0,0 +1,986 @@
/*
* Copyright 2000-2002 by Hans Reiser, licensing governed by reiserfs/README
*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2000, 2001 Free Software Foundation, Inc.
*
* (C) Copyright 2003 - 2004
* Sysgo AG, <www.elinos.com>, Pavel Bartusek <pba@sysgo.com>
*
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/* An implementation for the ReiserFS filesystem ported from GRUB.
* Some parts of this code (mainly the structures and defines) are
* from the original reiser fs code, as found in the linux kernel.
*/
#include <common.h>
#if (CONFIG_COMMANDS & CFG_CMD_REISER)
#include <malloc.h>
#include <linux/ctype.h>
#include <linux/time.h>
#include <asm/byteorder.h>
#include <reiserfs.h>
#include "reiserfs_private.h"
#undef REISERDEBUG
/* Some parts of this code (mainly the structures and defines) are
* from the original reiser fs code, as found in the linux kernel.
*/
static char fsys_buf[FSYS_BUFLEN];
static reiserfs_error_t errnum = ERR_NONE;
static int print_possibilities;
static unsigned int filepos, filemax;
static int
substring (const char *s1, const char *s2)
{
while (*s1 == *s2)
{
/* The strings match exactly. */
if (! *(s1++))
return 0;
s2 ++;
}
/* S1 is a substring of S2. */
if (*s1 == 0)
return -1;
/* S1 isn't a substring. */
return 1;
}
static void sd_print_item (struct item_head * ih, char * item)
{
char filetime[30];
time_t ttime;
if (stat_data_v1 (ih)) {
struct stat_data_v1 * sd = (struct stat_data_v1 *)item;
ttime = sd_v1_mtime(sd);
ctime_r(&ttime, filetime);
printf ("%-10s %4hd %6d %6d %9d %24.24s",
bb_mode_string(sd_v1_mode(sd)), sd_v1_nlink(sd),sd_v1_uid(sd), sd_v1_gid(sd),
sd_v1_size(sd), filetime);
} else {
struct stat_data * sd = (struct stat_data *)item;
ttime = sd_v2_mtime(sd);
ctime_r(&ttime, filetime);
printf ("%-10s %4d %6d %6d %9d %24.24s",
bb_mode_string(sd_v2_mode(sd)), sd_v2_nlink(sd),sd_v2_uid(sd),sd_v2_gid(sd),
(__u32) sd_v2_size(sd), filetime);
}
}
static int
journal_read (int block, int len, char *buffer)
{
return reiserfs_devread ((INFO->journal_block + block) << INFO->blocksize_shift,
0, len, buffer);
}
/* Read a block from ReiserFS file system, taking the journal into
* account. If the block nr is in the journal, the block from the
* journal taken.
*/
static int
block_read (unsigned int blockNr, int start, int len, char *buffer)
{
int transactions = INFO->journal_transactions;
int desc_block = INFO->journal_first_desc;
int journal_mask = INFO->journal_block_count - 1;
int translatedNr = blockNr;
__u32 *journal_table = JOURNAL_START;
while (transactions-- > 0)
{
int i = 0;
int j_len;
if (__le32_to_cpu(*journal_table) != 0xffffffff)
{
/* Search for the blockNr in cached journal */
j_len = __le32_to_cpu(*journal_table++);
while (i++ < j_len)
{
if (__le32_to_cpu(*journal_table++) == blockNr)
{
journal_table += j_len - i;
goto found;
}
}
}
else
{
/* This is the end of cached journal marker. The remaining
* transactions are still on disk.
*/
struct reiserfs_journal_desc desc;
struct reiserfs_journal_commit commit;
if (! journal_read (desc_block, sizeof (desc), (char *) &desc))
return 0;
j_len = __le32_to_cpu(desc.j_len);
while (i < j_len && i < JOURNAL_TRANS_HALF)
if (__le32_to_cpu(desc.j_realblock[i++]) == blockNr)
goto found;
if (j_len >= JOURNAL_TRANS_HALF)
{
int commit_block = (desc_block + 1 + j_len) & journal_mask;
if (! journal_read (commit_block,
sizeof (commit), (char *) &commit))
return 0;
while (i < j_len)
if (__le32_to_cpu(commit.j_realblock[i++ - JOURNAL_TRANS_HALF]) == blockNr)
goto found;
}
}
goto not_found;
found:
translatedNr = INFO->journal_block + ((desc_block + i) & journal_mask);
#ifdef REISERDEBUG
printf ("block_read: block %d is mapped to journal block %d.\n",
blockNr, translatedNr - INFO->journal_block);
#endif
/* We must continue the search, as this block may be overwritten
* in later transactions.
*/
not_found:
desc_block = (desc_block + 2 + j_len) & journal_mask;
}
return reiserfs_devread (translatedNr << INFO->blocksize_shift, start, len, buffer);
}
/* Init the journal data structure. We try to cache as much as
* possible in the JOURNAL_START-JOURNAL_END space, but if it is full
* we can still read the rest from the disk on demand.
*
* The first number of valid transactions and the descriptor block of the
* first valid transaction are held in INFO. The transactions are all
* adjacent, but we must take care of the journal wrap around.
*/
static int
journal_init (void)
{
unsigned int block_count = INFO->journal_block_count;
unsigned int desc_block;
unsigned int commit_block;
unsigned int next_trans_id;
struct reiserfs_journal_header header;
struct reiserfs_journal_desc desc;
struct reiserfs_journal_commit commit;
__u32 *journal_table = JOURNAL_START;
journal_read (block_count, sizeof (header), (char *) &header);
desc_block = __le32_to_cpu(header.j_first_unflushed_offset);
if (desc_block >= block_count)
return 0;
INFO->journal_first_desc = desc_block;
next_trans_id = __le32_to_cpu(header.j_last_flush_trans_id) + 1;
#ifdef REISERDEBUG
printf ("journal_init: last flushed %d\n",
__le32_to_cpu(header.j_last_flush_trans_id));
#endif
while (1)
{
journal_read (desc_block, sizeof (desc), (char *) &desc);
if (substring (JOURNAL_DESC_MAGIC, desc.j_magic) > 0
|| __le32_to_cpu(desc.j_trans_id) != next_trans_id
|| __le32_to_cpu(desc.j_mount_id) != __le32_to_cpu(header.j_mount_id))
/* no more valid transactions */
break;
commit_block = (desc_block + __le32_to_cpu(desc.j_len) + 1) & (block_count - 1);
journal_read (commit_block, sizeof (commit), (char *) &commit);
if (__le32_to_cpu(desc.j_trans_id) != commit.j_trans_id
|| __le32_to_cpu(desc.j_len) != __le32_to_cpu(commit.j_len))
/* no more valid transactions */
break;
#ifdef REISERDEBUG
printf ("Found valid transaction %d/%d at %d.\n",
__le32_to_cpu(desc.j_trans_id), __le32_to_cpu(desc.j_mount_id), desc_block);
#endif
next_trans_id++;
if (journal_table < JOURNAL_END)
{
if ((journal_table + 1 + __le32_to_cpu(desc.j_len)) >= JOURNAL_END)
{
/* The table is almost full; mark the end of the cached
* journal.*/
*journal_table = __cpu_to_le32(0xffffffff);
journal_table = JOURNAL_END;
}
else
{
unsigned int i;
/* Cache the length and the realblock numbers in the table.
* The block number of descriptor can easily be computed.
* and need not to be stored here.
*/
/* both are in the little endian format */
*journal_table++ = desc.j_len;
for (i = 0; i < __le32_to_cpu(desc.j_len) && i < JOURNAL_TRANS_HALF; i++)
{
/* both are in the little endian format */
*journal_table++ = desc.j_realblock[i];
#ifdef REISERDEBUG
printf ("block %d is in journal %d.\n",
__le32_to_cpu(desc.j_realblock[i]), desc_block);
#endif
}
for ( ; i < __le32_to_cpu(desc.j_len); i++)
{
/* both are in the little endian format */
*journal_table++ = commit.j_realblock[i-JOURNAL_TRANS_HALF];
#ifdef REISERDEBUG
printf ("block %d is in journal %d.\n",
__le32_to_cpu(commit.j_realblock[i-JOURNAL_TRANS_HALF]),
desc_block);
#endif
}
}
}
desc_block = (commit_block + 1) & (block_count - 1);
}
#ifdef REISERDEBUG
printf ("Transaction %d/%d at %d isn't valid.\n",
__le32_to_cpu(desc.j_trans_id), __le32_to_cpu(desc.j_mount_id), desc_block);
#endif
INFO->journal_transactions
= next_trans_id - __le32_to_cpu(header.j_last_flush_trans_id) - 1;
return errnum == 0;
}
/* check filesystem types and read superblock into memory buffer */
int
reiserfs_mount (unsigned part_length)
{
struct reiserfs_super_block super;
int superblock = REISERFS_DISK_OFFSET_IN_BYTES >> SECTOR_BITS;
if (part_length < superblock + (sizeof (super) >> SECTOR_BITS)
|| ! reiserfs_devread (superblock, 0, sizeof (struct reiserfs_super_block),
(char *) &super)
|| (substring (REISER3FS_SUPER_MAGIC_STRING, super.s_magic) > 0
&& substring (REISER2FS_SUPER_MAGIC_STRING, super.s_magic) > 0
&& substring (REISERFS_SUPER_MAGIC_STRING, super.s_magic) > 0)
|| (/* check that this is not a copy inside the journal log */
sb_journal_block(&super) * sb_blocksize(&super)
<= REISERFS_DISK_OFFSET_IN_BYTES))
{
/* Try old super block position */
superblock = REISERFS_OLD_DISK_OFFSET_IN_BYTES >> SECTOR_BITS;
if (part_length < superblock + (sizeof (super) >> SECTOR_BITS)
|| ! reiserfs_devread (superblock, 0, sizeof (struct reiserfs_super_block),
(char *) &super))
return 0;
if (substring (REISER2FS_SUPER_MAGIC_STRING, super.s_magic) > 0
&& substring (REISERFS_SUPER_MAGIC_STRING, super.s_magic) > 0)
{
/* pre journaling super block ? */
if (substring (REISERFS_SUPER_MAGIC_STRING,
(char*) ((int) &super + 20)) > 0)
return 0;
set_sb_blocksize(&super, REISERFS_OLD_BLOCKSIZE);
set_sb_journal_block(&super, 0);
set_sb_version(&super, 0);
}
}
/* check the version number. */
if (sb_version(&super) > REISERFS_MAX_SUPPORTED_VERSION)
return 0;
INFO->version = sb_version(&super);
INFO->blocksize = sb_blocksize(&super);
INFO->fullblocksize_shift = log2 (sb_blocksize(&super));
INFO->blocksize_shift = INFO->fullblocksize_shift - SECTOR_BITS;
INFO->cached_slots =
(FSYSREISER_CACHE_SIZE >> INFO->fullblocksize_shift) - 1;
#ifdef REISERDEBUG
printf ("reiserfs_mount: version=%d, blocksize=%d\n",
INFO->version, INFO->blocksize);
#endif /* REISERDEBUG */
/* Clear node cache. */
memset (INFO->blocks, 0, sizeof (INFO->blocks));
if (sb_blocksize(&super) < FSYSREISER_MIN_BLOCKSIZE
|| sb_blocksize(&super) > FSYSREISER_MAX_BLOCKSIZE
|| (SECTOR_SIZE << INFO->blocksize_shift) != sb_blocksize(&super))
return 0;
/* Initialize journal code. If something fails we end with zero
* journal_transactions, so we don't access the journal at all.
*/
INFO->journal_transactions = 0;
if (sb_journal_block(&super) != 0 && super.s_journal_dev == 0)
{
INFO->journal_block = sb_journal_block(&super);
INFO->journal_block_count = sb_journal_size(&super);
if (is_power_of_two (INFO->journal_block_count))
journal_init ();
/* Read in super block again, maybe it is in the journal */
block_read (superblock >> INFO->blocksize_shift,
0, sizeof (struct reiserfs_super_block), (char *) &super);
}
if (! block_read (sb_root_block(&super), 0, INFO->blocksize, (char*) ROOT))
return 0;
INFO->tree_depth = __le16_to_cpu(BLOCKHEAD (ROOT)->blk_level);
#ifdef REISERDEBUG
printf ("root read_in: block=%d, depth=%d\n",
sb_root_block(&super), INFO->tree_depth);
#endif /* REISERDEBUG */
if (INFO->tree_depth >= MAX_HEIGHT)
return 0;
if (INFO->tree_depth == DISK_LEAF_NODE_LEVEL)
{
/* There is only one node in the whole filesystem,
* which is simultanously leaf and root */
memcpy (LEAF, ROOT, INFO->blocksize);
}
return 1;
}
/***************** TREE ACCESSING METHODS *****************************/
/* I assume you are familiar with the ReiserFS tree, if not go to
* http://www.namesys.com/content_table.html
*
* My tree node cache is organized as following
* 0 ROOT node
* 1 LEAF node (if the ROOT is also a LEAF it is copied here
* 2-n other nodes on current path from bottom to top.
* if there is not enough space in the cache, the top most are
* omitted.
*
* I have only two methods to find a key in the tree:
* search_stat(dir_id, objectid) searches for the stat entry (always
* the first entry) of an object.
* next_key() gets the next key in tree order.
*
* This means, that I can only sequential reads of files are
* efficient, but this really doesn't hurt for grub.
*/
/* Read in the node at the current path and depth into the node cache.
* You must set INFO->blocks[depth] before.
*/
static char *
read_tree_node (unsigned int blockNr, int depth)
{
char* cache = CACHE(depth);
int num_cached = INFO->cached_slots;
if (depth < num_cached)
{
/* This is the cached part of the path. Check if same block is
* needed.
*/
if (blockNr == INFO->blocks[depth])
return cache;
}
else
cache = CACHE(num_cached);
#ifdef REISERDEBUG
printf (" next read_in: block=%d (depth=%d)\n",
blockNr, depth);
#endif /* REISERDEBUG */
if (! block_read (blockNr, 0, INFO->blocksize, cache))
return 0;
/* Make sure it has the right node level */
if (__le16_to_cpu(BLOCKHEAD (cache)->blk_level) != depth)
{
errnum = ERR_FSYS_CORRUPT;
return 0;
}
INFO->blocks[depth] = blockNr;
return cache;
}
/* Get the next key, i.e. the key following the last retrieved key in
* tree order. INFO->current_ih and
* INFO->current_info are adapted accordingly. */
static int
next_key (void)
{
int depth;
struct item_head *ih = INFO->current_ih + 1;
char *cache;
#ifdef REISERDEBUG
printf ("next_key:\n old ih: key %d:%d:%d:%d version:%d\n",
__le32_to_cpu(INFO->current_ih->ih_key.k_dir_id),
__le32_to_cpu(INFO->current_ih->ih_key.k_objectid),
__le32_to_cpu(INFO->current_ih->ih_key.u.v1.k_offset),
__le32_to_cpu(INFO->current_ih->ih_key.u.v1.k_uniqueness),
__le16_to_cpu(INFO->current_ih->ih_version));
#endif /* REISERDEBUG */
if (ih == &ITEMHEAD[__le16_to_cpu(BLOCKHEAD (LEAF)->blk_nr_item)])
{
depth = DISK_LEAF_NODE_LEVEL;
/* The last item, was the last in the leaf node.
* Read in the next block
*/
do
{
if (depth == INFO->tree_depth)
{
/* There are no more keys at all.
* Return a dummy item with MAX_KEY */
ih = (struct item_head *) &BLOCKHEAD (LEAF)->blk_right_delim_key;
goto found;
}
depth++;
#ifdef REISERDEBUG
printf (" depth=%d, i=%d\n", depth, INFO->next_key_nr[depth]);
#endif /* REISERDEBUG */
}
while (INFO->next_key_nr[depth] == 0);
if (depth == INFO->tree_depth)
cache = ROOT;
else if (depth <= INFO->cached_slots)
cache = CACHE (depth);
else
{
cache = read_tree_node (INFO->blocks[depth], depth);
if (! cache)
return 0;
}
do
{
int nr_item = __le16_to_cpu(BLOCKHEAD (cache)->blk_nr_item);
int key_nr = INFO->next_key_nr[depth]++;
#ifdef REISERDEBUG
printf (" depth=%d, i=%d/%d\n", depth, key_nr, nr_item);
#endif /* REISERDEBUG */
if (key_nr == nr_item)
/* This is the last item in this block, set the next_key_nr to 0 */
INFO->next_key_nr[depth] = 0;
cache = read_tree_node (dc_block_number(&(DC (cache)[key_nr])), --depth);
if (! cache)
return 0;
}
while (depth > DISK_LEAF_NODE_LEVEL);
ih = ITEMHEAD;
}
found:
INFO->current_ih = ih;
INFO->current_item = &LEAF[__le16_to_cpu(ih->ih_item_location)];
#ifdef REISERDEBUG
printf (" new ih: key %d:%d:%d:%d version:%d\n",
__le32_to_cpu(INFO->current_ih->ih_key.k_dir_id),
__le32_to_cpu(INFO->current_ih->ih_key.k_objectid),
__le32_to_cpu(INFO->current_ih->ih_key.u.v1.k_offset),
__le32_to_cpu(INFO->current_ih->ih_key.u.v1.k_uniqueness),
__le16_to_cpu(INFO->current_ih->ih_version));
#endif /* REISERDEBUG */
return 1;
}
/* preconditions: reiserfs_mount already executed, therefore
* INFO block is valid
* returns: 0 if error (errnum is set),
* nonzero iff we were able to find the key successfully.
* postconditions: on a nonzero return, the current_ih and
* current_item fields describe the key that equals the
* searched key. INFO->next_key contains the next key after
* the searched key.
* side effects: messes around with the cache.
*/
static int
search_stat (__u32 dir_id, __u32 objectid)
{
char *cache;
int depth;
int nr_item;
int i;
struct item_head *ih;
#ifdef REISERDEBUG
printf ("search_stat:\n key %d:%d:0:0\n", dir_id, objectid);
#endif /* REISERDEBUG */
depth = INFO->tree_depth;
cache = ROOT;
while (depth > DISK_LEAF_NODE_LEVEL)
{
struct key *key;
nr_item = __le16_to_cpu(BLOCKHEAD (cache)->blk_nr_item);
key = KEY (cache);
for (i = 0; i < nr_item; i++)
{
if (__le32_to_cpu(key->k_dir_id) > dir_id
|| (__le32_to_cpu(key->k_dir_id) == dir_id
&& (__le32_to_cpu(key->k_objectid) > objectid
|| (__le32_to_cpu(key->k_objectid) == objectid
&& (__le32_to_cpu(key->u.v1.k_offset)
| __le32_to_cpu(key->u.v1.k_uniqueness)) > 0))))
break;
key++;
}
#ifdef REISERDEBUG
printf (" depth=%d, i=%d/%d\n", depth, i, nr_item);
#endif /* REISERDEBUG */
INFO->next_key_nr[depth] = (i == nr_item) ? 0 : i+1;
cache = read_tree_node (dc_block_number(&(DC (cache)[i])), --depth);
if (! cache)
return 0;
}
/* cache == LEAF */
nr_item = __le16_to_cpu(BLOCKHEAD (LEAF)->blk_nr_item);
ih = ITEMHEAD;
for (i = 0; i < nr_item; i++)
{
if (__le32_to_cpu(ih->ih_key.k_dir_id) == dir_id
&& __le32_to_cpu(ih->ih_key.k_objectid) == objectid
&& __le32_to_cpu(ih->ih_key.u.v1.k_offset) == 0
&& __le32_to_cpu(ih->ih_key.u.v1.k_uniqueness) == 0)
{
#ifdef REISERDEBUG
printf (" depth=%d, i=%d/%d\n", depth, i, nr_item);
#endif /* REISERDEBUG */
INFO->current_ih = ih;
INFO->current_item = &LEAF[__le16_to_cpu(ih->ih_item_location)];
return 1;
}
ih++;
}
errnum = ERR_FSYS_CORRUPT;
return 0;
}
int
reiserfs_read (char *buf, unsigned len)
{
unsigned int blocksize;
unsigned int offset;
unsigned int to_read;
char *prev_buf = buf;
#ifdef REISERDEBUG
printf ("reiserfs_read: filepos=%d len=%d, offset=%Lx\n",
filepos, len, (__u64) IH_KEY_OFFSET (INFO->current_ih) - 1);
#endif /* REISERDEBUG */
if (__le32_to_cpu(INFO->current_ih->ih_key.k_objectid) != INFO->fileinfo.k_objectid
|| IH_KEY_OFFSET (INFO->current_ih) > filepos + 1)
{
search_stat (INFO->fileinfo.k_dir_id, INFO->fileinfo.k_objectid);
goto get_next_key;
}
while (! errnum)
{
if (__le32_to_cpu(INFO->current_ih->ih_key.k_objectid) != INFO->fileinfo.k_objectid) {
break;
}
offset = filepos - IH_KEY_OFFSET (INFO->current_ih) + 1;
blocksize = __le16_to_cpu(INFO->current_ih->ih_item_len);
#ifdef REISERDEBUG
printf (" loop: filepos=%d len=%d, offset=%d blocksize=%d\n",
filepos, len, offset, blocksize);
#endif /* REISERDEBUG */
if (IH_KEY_ISTYPE(INFO->current_ih, TYPE_DIRECT)
&& offset < blocksize)
{
#ifdef REISERDEBUG
printf ("direct_read: offset=%d, blocksize=%d\n",
offset, blocksize);
#endif /* REISERDEBUG */
to_read = blocksize - offset;
if (to_read > len)
to_read = len;
memcpy (buf, INFO->current_item + offset, to_read);
goto update_buf_len;
}
else if (IH_KEY_ISTYPE(INFO->current_ih, TYPE_INDIRECT))
{
blocksize = (blocksize >> 2) << INFO->fullblocksize_shift;
#ifdef REISERDEBUG
printf ("indirect_read: offset=%d, blocksize=%d\n",
offset, blocksize);
#endif /* REISERDEBUG */
while (offset < blocksize)
{
__u32 blocknr = __le32_to_cpu(((__u32 *) INFO->current_item)
[offset >> INFO->fullblocksize_shift]);
int blk_offset = offset & (INFO->blocksize-1);
to_read = INFO->blocksize - blk_offset;
if (to_read > len)
to_read = len;
/* Journal is only for meta data. Data blocks can be read
* directly without using block_read
*/
reiserfs_devread (blocknr << INFO->blocksize_shift,
blk_offset, to_read, buf);
update_buf_len:
len -= to_read;
buf += to_read;
offset += to_read;
filepos += to_read;
if (len == 0)
goto done;
}
}
get_next_key:
next_key ();
}
done:
return errnum ? 0 : buf - prev_buf;
}
/* preconditions: reiserfs_mount already executed, therefore
* INFO block is valid
* returns: 0 if error, nonzero iff we were able to find the file successfully
* postconditions: on a nonzero return, INFO->fileinfo contains the info
* of the file we were trying to look up, filepos is 0 and filemax is
* the size of the file.
*/
static int
reiserfs_dir (char *dirname)
{
struct reiserfs_de_head *de_head;
char *rest, ch;
__u32 dir_id, objectid, parent_dir_id = 0, parent_objectid = 0;
#ifndef STAGE1_5
int do_possibilities = 0;
#endif /* ! STAGE1_5 */
char linkbuf[PATH_MAX]; /* buffer for following symbolic links */
int link_count = 0;
int mode;
dir_id = REISERFS_ROOT_PARENT_OBJECTID;
objectid = REISERFS_ROOT_OBJECTID;
while (1)
{
#ifdef REISERDEBUG
printf ("dirname=%s\n", dirname);
#endif /* REISERDEBUG */
/* Search for the stat info first. */
if (! search_stat (dir_id, objectid))
return 0;
#ifdef REISERDEBUG
printf ("sd_mode=%x sd_size=%d\n",
stat_data_v1(INFO->current_ih) ? sd_v1_mode((struct stat_data_v1 *) INFO->current_item) :
sd_v2_mode((struct stat_data *) (INFO->current_item)),
stat_data_v1(INFO->current_ih) ? sd_v1_size((struct stat_data_v1 *) INFO->current_item) :
sd_v2_size((struct stat_data *) INFO->current_item)
);
#endif /* REISERDEBUG */
mode = stat_data_v1(INFO->current_ih) ?
sd_v1_mode((struct stat_data_v1 *) INFO->current_item) :
sd_v2_mode((struct stat_data *) INFO->current_item);
/* If we've got a symbolic link, then chase it. */
if (S_ISLNK (mode))
{
unsigned int len;
if (++link_count > MAX_LINK_COUNT)
{
errnum = ERR_SYMLINK_LOOP;
return 0;
}
/* Get the symlink size. */
filemax = stat_data_v1(INFO->current_ih) ?
sd_v1_size((struct stat_data_v1 *) INFO->current_item) :
sd_v2_size((struct stat_data *) INFO->current_item);
/* Find out how long our remaining name is. */
len = 0;
while (dirname[len] && !isspace (dirname[len]))
len++;
if (filemax + len > sizeof (linkbuf) - 1)
{
errnum = ERR_FILELENGTH;
return 0;
}
/* Copy the remaining name to the end of the symlink data.
Note that DIRNAME and LINKBUF may overlap! */
memmove (linkbuf + filemax, dirname, len+1);
INFO->fileinfo.k_dir_id = dir_id;
INFO->fileinfo.k_objectid = objectid;
filepos = 0;
if (! next_key ()
|| reiserfs_read (linkbuf, filemax) != filemax)
{
if (! errnum)
errnum = ERR_FSYS_CORRUPT;
return 0;
}
#ifdef REISERDEBUG
printf ("symlink=%s\n", linkbuf);
#endif /* REISERDEBUG */
dirname = linkbuf;
if (*dirname == '/')
{
/* It's an absolute link, so look it up in root. */
dir_id = REISERFS_ROOT_PARENT_OBJECTID;
objectid = REISERFS_ROOT_OBJECTID;
}
else
{
/* Relative, so look it up in our parent directory. */
dir_id = parent_dir_id;
objectid = parent_objectid;
}
/* Now lookup the new name. */
continue;
}
/* if we have a real file (and we're not just printing possibilities),
then this is where we want to exit */
if (! *dirname || isspace (*dirname))
{
if (! S_ISREG (mode))
{
errnum = ERR_BAD_FILETYPE;
return 0;
}
filepos = 0;
filemax = stat_data_v1(INFO->current_ih) ?
sd_v1_size((struct stat_data_v1 *) INFO->current_item) :
sd_v2_size((struct stat_data *) INFO->current_item);
#if 0
/* If this is a new stat data and size is > 4GB set filemax to
* maximum
*/
if (__le16_to_cpu(INFO->current_ih->ih_version) == ITEM_VERSION_2
&& sd_size_hi((struct stat_data *) INFO->current_item) > 0)
filemax = 0xffffffff;
#endif
INFO->fileinfo.k_dir_id = dir_id;
INFO->fileinfo.k_objectid = objectid;
return next_key ();
}
/* continue with the file/directory name interpretation */
while (*dirname == '/')
dirname++;
if (! S_ISDIR (mode))
{
errnum = ERR_BAD_FILETYPE;
return 0;
}
for (rest = dirname; (ch = *rest) && ! isspace (ch) && ch != '/'; rest++);
*rest = 0;
# ifndef STAGE1_5
if (print_possibilities && ch != '/')
do_possibilities = 1;
# endif /* ! STAGE1_5 */
while (1)
{
char *name_end;
int num_entries;
if (! next_key ())
return 0;
#ifdef REISERDEBUG
printf ("ih: key %d:%d:%d:%d version:%d\n",
__le32_to_cpu(INFO->current_ih->ih_key.k_dir_id),
__le32_to_cpu(INFO->current_ih->ih_key.k_objectid),
__le32_to_cpu(INFO->current_ih->ih_key.u.v1.k_offset),
__le32_to_cpu(INFO->current_ih->ih_key.u.v1.k_uniqueness),
__le16_to_cpu(INFO->current_ih->ih_version));
#endif /* REISERDEBUG */
if (__le32_to_cpu(INFO->current_ih->ih_key.k_objectid) != objectid)
break;
name_end = INFO->current_item + __le16_to_cpu(INFO->current_ih->ih_item_len);
de_head = (struct reiserfs_de_head *) INFO->current_item;
num_entries = __le16_to_cpu(INFO->current_ih->u.ih_entry_count);
while (num_entries > 0)
{
char *filename = INFO->current_item + deh_location(de_head);
char tmp = *name_end;
if ((deh_state(de_head) & DEH_Visible))
{
int cmp;
/* Directory names in ReiserFS are not null
* terminated. We write a temporary 0 behind it.
* NOTE: that this may overwrite the first block in
* the tree cache. That doesn't hurt as long as we
* don't call next_key () in between.
*/
*name_end = 0;
cmp = substring (dirname, filename);
*name_end = tmp;
# ifndef STAGE1_5
if (do_possibilities)
{
if (cmp <= 0)
{
char fn[PATH_MAX];
struct fsys_reiser_info info_save;
if (print_possibilities > 0)
print_possibilities = -print_possibilities;
*name_end = 0;
strcpy(fn, filename);
*name_end = tmp;
/* If NAME is "." or "..", do not count it. */
if (strcmp (fn, ".") != 0 && strcmp (fn, "..") != 0) {
memcpy(&info_save, INFO, sizeof(struct fsys_reiser_info));
search_stat (deh_dir_id(de_head), deh_objectid(de_head));
sd_print_item(INFO->current_ih, INFO->current_item);
printf(" %s\n", fn);
search_stat (dir_id, objectid);
memcpy(INFO, &info_save, sizeof(struct fsys_reiser_info));
}
}
}
else
# endif /* ! STAGE1_5 */
if (cmp == 0)
goto found;
}
/* The beginning of this name marks the end of the next name.
*/
name_end = filename;
de_head++;
num_entries--;
}
}
# ifndef STAGE1_5
if (print_possibilities < 0)
return 1;
# endif /* ! STAGE1_5 */
errnum = ERR_FILE_NOT_FOUND;
*rest = ch;
return 0;
found:
*rest = ch;
dirname = rest;
parent_dir_id = dir_id;
parent_objectid = objectid;
dir_id = deh_dir_id(de_head);
objectid = deh_objectid(de_head);
}
}
/*
* U-Boot interface functions
*/
/*
* List given directory
*
* RETURN: 0 - OK, else grub_error_t errnum
*/
int
reiserfs_ls (char *dirname)
{
char *dir_slash;
int res;
errnum = 0;
dir_slash = malloc(strlen(dirname) + 1);
if (dir_slash == NULL) {
return ERR_NUMBER_OVERFLOW;
}
strcpy(dir_slash, dirname);
/* add "/" to the directory name */
strcat(dir_slash, "/");
print_possibilities = 1;
res = reiserfs_dir (dir_slash);
free(dir_slash);
if (!res || errnum) {
return errnum;
}
return 0;
}
/*
* Open file for reading
*
* RETURN: >0 - OK, size of opened file
* <0 - ERROR -grub_error_t errnum
*/
int
reiserfs_open (char *filename)
{
/* open the file */
errnum = 0;
print_possibilities = 0;
if (!reiserfs_dir (filename) || errnum) {
return -errnum;
}
return filemax;
}
#endif /* CFG_CMD_REISER */

521
fs/reiserfs/reiserfs_private.h
Unescape View File

@ -0,0 +1,521 @@
/*
* Copyright 2000-2002 by Hans Reiser, licensing governed by reiserfs/README
*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2000, 2001 Free Software Foundation, Inc.
*
* (C) Copyright 2003 - 2004
* Sysgo AG, <www.elinos.com>, Pavel Bartusek <pba@sysgo.com>
*
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/* An implementation for the ReiserFS filesystem ported from GRUB.
* Some parts of this code (mainly the structures and defines) are
* from the original reiser fs code, as found in the linux kernel.
*/
#ifndef __BYTE_ORDER
#if defined(__LITTLE_ENDIAN) && !defined(__BIG_ENDIAN)
#define __BYTE_ORDER __LITTLE_ENDIAN
#elif defined(__BIG_ENDIAN) && !defined(__LITTLE_ENDIAN)
#define __BYTE_ORDER __BIG_ENDIAN
#else
#error "unable to define __BYTE_ORDER"
#endif
#endif /* not __BYTE_ORDER */
#define FSYS_BUFLEN 0x8000
#define FSYS_BUF fsys_buf
/* This is the new super block of a journaling reiserfs system */
struct reiserfs_super_block
{
__u32 s_block_count; /* blocks count */
__u32 s_free_blocks; /* free blocks count */
__u32 s_root_block; /* root block number */
__u32 s_journal_block; /* journal block number */
__u32 s_journal_dev; /* journal device number */
__u32 s_journal_size; /* size of the journal on FS creation. used to make sure they don't overflow it */
__u32 s_journal_trans_max; /* max number of blocks in a transaction. */
__u32 s_journal_magic; /* random value made on fs creation */
__u32 s_journal_max_batch; /* max number of blocks to batch into a trans */
__u32 s_journal_max_commit_age; /* in seconds, how old can an async commit be */
__u32 s_journal_max_trans_age; /* in seconds, how old can a transaction be */
__u16 s_blocksize; /* block size */
__u16 s_oid_maxsize; /* max size of object id array */
__u16 s_oid_cursize; /* current size of object id array */
__u16 s_state; /* valid or error */
char s_magic[16]; /* reiserfs magic string indicates that file system is reiserfs */
__u16 s_tree_height; /* height of disk tree */
__u16 s_bmap_nr; /* amount of bitmap blocks needed to address each block of file system */
__u16 s_version;
char s_unused[128]; /* zero filled by mkreiserfs */
};
#define sb_root_block(sbp) (__le32_to_cpu((sbp)->s_root_block))
#define sb_journal_block(sbp) (__le32_to_cpu((sbp)->s_journal_block))
#define set_sb_journal_block(sbp,v) ((sbp)->s_journal_block = __cpu_to_le32(v))
#define sb_journal_size(sbp) (__le32_to_cpu((sbp)->s_journal_size))
#define sb_blocksize(sbp) (__le16_to_cpu((sbp)->s_blocksize))
#define set_sb_blocksize(sbp,v) ((sbp)->s_blocksize = __cpu_to_le16(v))
#define sb_version(sbp) (__le16_to_cpu((sbp)->s_version))
#define set_sb_version(sbp,v) ((sbp)->s_version = __cpu_to_le16(v))
#define REISERFS_MAX_SUPPORTED_VERSION 2
#define REISERFS_SUPER_MAGIC_STRING "ReIsErFs"
#define REISER2FS_SUPER_MAGIC_STRING "ReIsEr2Fs"
#define REISER3FS_SUPER_MAGIC_STRING "ReIsEr3Fs"
#define MAX_HEIGHT 7
/* must be correct to keep the desc and commit structs at 4k */
#define JOURNAL_TRANS_HALF 1018
/* first block written in a commit. */
struct reiserfs_journal_desc {
__u32 j_trans_id; /* id of commit */
__u32 j_len; /* length of commit. len +1 is the commit block */
__u32 j_mount_id; /* mount id of this trans*/
__u32 j_realblock[JOURNAL_TRANS_HALF]; /* real locations for the first blocks */
char j_magic[12];
};
/* last block written in a commit */
struct reiserfs_journal_commit {
__u32 j_trans_id; /* must match j_trans_id from the desc block */
__u32 j_len; /* ditto */
__u32 j_realblock[JOURNAL_TRANS_HALF]; /* real locations for the last blocks */
char j_digest[16]; /* md5 sum of all the blocks involved, including desc and commit. not used, kill it */
};
/* this header block gets written whenever a transaction is considered
fully flushed, and is more recent than the last fully flushed
transaction.
fully flushed means all the log blocks and all the real blocks are
on disk, and this transaction does not need to be replayed.
*/
struct reiserfs_journal_header {
/* id of last fully flushed transaction */
__u32 j_last_flush_trans_id;
/* offset in the log of where to start replay after a crash */
__u32 j_first_unflushed_offset;
/* mount id to detect very old transactions */
__u32 j_mount_id;
};
/* magic string to find desc blocks in the journal */
#define JOURNAL_DESC_MAGIC "ReIsErLB"
/*
* directories use this key as well as old files
*/
struct offset_v1
{
/*
* for regular files this is the offset to the first byte of the
* body, contained in the object-item, as measured from the start of
* the entire body of the object.
*
* for directory entries, k_offset consists of hash derived from
* hashing the name and using few bits (23 or more) of the resulting
* hash, and generation number that allows distinguishing names with
* hash collisions. If number of collisions overflows generation
* number, we return EEXIST. High order bit is 0 always
*/
__u32 k_offset;
__u32 k_uniqueness;
};
struct offset_v2 {
/*
* for regular files this is the offset to the first byte of the
* body, contained in the object-item, as measured from the start of
* the entire body of the object.
*
* for directory entries, k_offset consists of hash derived from
* hashing the name and using few bits (23 or more) of the resulting
* hash, and generation number that allows distinguishing names with
* hash collisions. If number of collisions overflows generation
* number, we return EEXIST. High order bit is 0 always
*/
#if defined(__LITTLE_ENDIAN_BITFIELD)
/* little endian version */
__u64 k_offset:60;
__u64 k_type: 4;
#elif defined(__BIG_ENDIAN_BITFIELD)
/* big endian version */
__u64 k_type: 4;
__u64 k_offset:60;
#else
#error "__LITTLE_ENDIAN_BITFIELD or __BIG_ENDIAN_BITFIELD must be defined"
#endif
} __attribute__ ((__packed__));
#define TYPE_MAXTYPE 3
#define TYPE_ANY 15
#if (__BYTE_ORDER == __BIG_ENDIAN)
typedef union {
struct offset_v2 offset_v2;
__u64 linear;
} __attribute__ ((__packed__)) offset_v2_esafe_overlay;
static inline __u16 offset_v2_k_type( const struct offset_v2 *v2 )
{
offset_v2_esafe_overlay tmp = *(const offset_v2_esafe_overlay *)v2;
tmp.linear = __le64_to_cpu( tmp.linear );
return (tmp.offset_v2.k_type <= TYPE_MAXTYPE)?tmp.offset_v2.k_type:TYPE_ANY;
}
static inline loff_t offset_v2_k_offset( const struct offset_v2 *v2 )
{
offset_v2_esafe_overlay tmp = *(const offset_v2_esafe_overlay *)v2;
tmp.linear = __le64_to_cpu( tmp.linear );
return tmp.offset_v2.k_offset;
}
#elif (__BYTE_ORDER == __LITTLE_ENDIAN)
# define offset_v2_k_type(v2) ((v2)->k_type)
# define offset_v2_k_offset(v2) ((v2)->k_offset)
#else
#error "__BYTE_ORDER must be __LITTLE_ENDIAN or __BIG_ENDIAN"
#endif
struct key
{
/* packing locality: by default parent directory object id */
__u32 k_dir_id;
/* object identifier */
__u32 k_objectid;
/* the offset and node type (old and new form) */
union
{
struct offset_v1 v1;
struct offset_v2 v2;
}
u;
};
#define KEY_SIZE (sizeof (struct key))
/* Header of a disk block. More precisely, header of a formatted leaf
or internal node, and not the header of an unformatted node. */
struct block_head
{
__u16 blk_level; /* Level of a block in the tree. */
__u16 blk_nr_item; /* Number of keys/items in a block. */
__u16 blk_free_space; /* Block free space in bytes. */
struct key blk_right_delim_key; /* Right delimiting key for this block (supported for leaf level nodes
only) */
};
#define BLKH_SIZE (sizeof (struct block_head))
#define DISK_LEAF_NODE_LEVEL 1 /* Leaf node level. */
struct item_head
{
/* Everything in the tree is found by searching for it based on
* its key.*/
struct key ih_key;
union {
/* The free space in the last unformatted node of an
indirect item if this is an indirect item. This
equals 0xFFFF iff this is a direct item or stat data
item. Note that the key, not this field, is used to
determine the item type, and thus which field this
union contains. */
__u16 ih_free_space;
/* Iff this is a directory item, this field equals the
number of directory entries in the directory item. */
__u16 ih_entry_count;
} __attribute__ ((__packed__)) u;
__u16 ih_item_len; /* total size of the item body */
__u16 ih_item_location; /* an offset to the item body
* within the block */
__u16 ih_version; /* 0 for all old items, 2 for new
ones. Highest bit is set by fsck
temporary, cleaned after all
done */
} __attribute__ ((__packed__));
/* size of item header */
#define IH_SIZE (sizeof (struct item_head))
#define ITEM_VERSION_1 0
#define ITEM_VERSION_2 1
#define ih_version(ih) (__le16_to_cpu((ih)->ih_version))
#define IH_KEY_OFFSET(ih) (ih_version(ih) == ITEM_VERSION_1 \
? __le32_to_cpu((ih)->ih_key.u.v1.k_offset) \
: offset_v2_k_offset(&((ih)->ih_key.u.v2)))
#define IH_KEY_ISTYPE(ih, type) (ih_version(ih) == ITEM_VERSION_1 \
? __le32_to_cpu((ih)->ih_key.u.v1.k_uniqueness) == V1_##type \
: offset_v2_k_type(&((ih)->ih_key.u.v2)) == V2_##type)
/***************************************************************************/
/* DISK CHILD */
/***************************************************************************/
/* Disk child pointer: The pointer from an internal node of the tree
to a node that is on disk. */
struct disk_child {
__u32 dc_block_number; /* Disk child's block number. */
__u16 dc_size; /* Disk child's used space. */
__u16 dc_reserved;
};
#define DC_SIZE (sizeof(struct disk_child))
#define dc_block_number(dc_p) (__le32_to_cpu((dc_p)->dc_block_number))
//
// old stat data is 32 bytes long. We are going to distinguish new one by
// different size
//
struct stat_data_v1
{
__u16 sd_mode; /* file type, permissions */
__u16 sd_nlink; /* number of hard links */
__u16 sd_uid; /* owner */
__u16 sd_gid; /* group */
__u32 sd_size; /* file size */
__u32 sd_atime; /* time of last access */
__u32 sd_mtime; /* time file was last modified */
__u32 sd_ctime; /* time inode (stat data) was last changed (except changes to sd_atime and sd_mtime) */
union {
__u32 sd_rdev;
__u32 sd_blocks; /* number of blocks file uses */
} __attribute__ ((__packed__)) u;
__u32 sd_first_direct_byte; /* first byte of file which is stored
in a direct item: except that if it
equals 1 it is a symlink and if it
equals ~(__u32)0 there is no
direct item. The existence of this
field really grates on me. Let's
replace it with a macro based on
sd_size and our tail suppression
policy. Someday. -Hans */
} __attribute__ ((__packed__));
#define stat_data_v1(ih) (ih_version(ih) == ITEM_VERSION_1)
//#define sd_v1_mode(sdp) (__le16_to_cpu((sdp)->sd_mode))
#define sd_v1_mode(sdp) ((sdp)->sd_mode)
#define sd_v1_nlink(sdp) (__le16_to_cpu((sdp)->sd_nlink))
#define sd_v1_uid(sdp) (__le16_to_cpu((sdp)->sd_uid))
#define sd_v1_gid(sdp) (__le16_to_cpu((sdp)->sd_gid))
#define sd_v1_size(sdp) (__le32_to_cpu((sdp)->sd_size))
#define sd_v1_mtime(sdp) (__le32_to_cpu((sdp)->sd_mtime))
/* Stat Data on disk (reiserfs version of UFS disk inode minus the
address blocks) */
struct stat_data {
__u16 sd_mode; /* file type, permissions */
__u16 sd_attrs; /* persistent inode flags */
__u32 sd_nlink; /* number of hard links */
__u64 sd_size; /* file size */
__u32 sd_uid; /* owner */
__u32 sd_gid; /* group */
__u32 sd_atime; /* time of last access */
__u32 sd_mtime; /* time file was last modified */
__u32 sd_ctime; /* time inode (stat data) was last changed (except changes to sd_atime and sd_mtime) */
__u32 sd_blocks;
union {
__u32 sd_rdev;
__u32 sd_generation;
//__u32 sd_first_direct_byte;
/* first byte of file which is stored in a
direct item: except that if it equals 1
it is a symlink and if it equals
~(__u32)0 there is no direct item. The
existence of this field really grates
on me. Let's replace it with a macro
based on sd_size and our tail
suppression policy? */
} __attribute__ ((__packed__)) u;
} __attribute__ ((__packed__));
#define stat_data_v2(ih) (ih_version(ih) == ITEM_VERSION_2)
#define sd_v2_mode(sdp) (__le16_to_cpu((sdp)->sd_mode))
#define sd_v2_nlink(sdp) (__le32_to_cpu((sdp)->sd_nlink))
#define sd_v2_size(sdp) (__le64_to_cpu((sdp)->sd_size))
#define sd_v2_uid(sdp) (__le32_to_cpu((sdp)->sd_uid))
#define sd_v2_gid(sdp) (__le32_to_cpu((sdp)->sd_gid))
#define sd_v2_mtime(sdp) (__le32_to_cpu((sdp)->sd_mtime))
#define sd_mode(sdp) (__le16_to_cpu((sdp)->sd_mode))
#define sd_size(sdp) (__le32_to_cpu((sdp)->sd_size))
#define sd_size_hi(sdp) (__le32_to_cpu((sdp)->sd_size_hi))
struct reiserfs_de_head
{
__u32 deh_offset; /* third component of the directory entry key */
__u32 deh_dir_id; /* objectid of the parent directory of the
object, that is referenced by directory entry */
__u32 deh_objectid;/* objectid of the object, that is referenced by
directory entry */
__u16 deh_location;/* offset of name in the whole item */
__u16 deh_state; /* whether 1) entry contains stat data (for
future), and 2) whether entry is hidden
(unlinked) */
};
#define DEH_SIZE (sizeof (struct reiserfs_de_head))
#define deh_offset(p_deh) (__le32_to_cpu((p_deh)->deh_offset))
#define deh_dir_id(p_deh) (__le32_to_cpu((p_deh)->deh_dir_id))
#define deh_objectid(p_deh) (__le32_to_cpu((p_deh)->deh_objectid))
#define deh_location(p_deh) (__le16_to_cpu((p_deh)->deh_location))
#define deh_state(p_deh) (__le16_to_cpu((p_deh)->deh_state))
#define DEH_Statdata (1 << 0) /* not used now */
#define DEH_Visible (1 << 2)
#define SD_OFFSET 0
#define SD_UNIQUENESS 0
#define DOT_OFFSET 1
#define DOT_DOT_OFFSET 2
#define DIRENTRY_UNIQUENESS 500
#define V1_TYPE_STAT_DATA 0x0
#define V1_TYPE_DIRECT 0xffffffff
#define V1_TYPE_INDIRECT 0xfffffffe
#define V1_TYPE_DIRECTORY_MAX 0xfffffffd
#define V2_TYPE_STAT_DATA 0
#define V2_TYPE_INDIRECT 1
#define V2_TYPE_DIRECT 2
#define V2_TYPE_DIRENTRY 3
#define REISERFS_ROOT_OBJECTID 2
#define REISERFS_ROOT_PARENT_OBJECTID 1
#define REISERFS_DISK_OFFSET_IN_BYTES (64 * 1024)
/* the spot for the super in versions 3.5 - 3.5.11 (inclusive) */
#define REISERFS_OLD_DISK_OFFSET_IN_BYTES (8 * 1024)
#define REISERFS_OLD_BLOCKSIZE 4096
#define S_ISREG(mode) (((mode) & 0170000) == 0100000)
#define S_ISDIR(mode) (((mode) & 0170000) == 0040000)
#define S_ISLNK(mode) (((mode) & 0170000) == 0120000)
#define PATH_MAX 1024 /* include/linux/limits.h */
#define MAX_LINK_COUNT 5 /* number of symbolic links to follow */
/* The size of the node cache */
#define FSYSREISER_CACHE_SIZE 24*1024
#define FSYSREISER_MIN_BLOCKSIZE SECTOR_SIZE
#define FSYSREISER_MAX_BLOCKSIZE FSYSREISER_CACHE_SIZE / 3
/* Info about currently opened file */
struct fsys_reiser_fileinfo
{
__u32 k_dir_id;
__u32 k_objectid;
};
/* In memory info about the currently mounted filesystem */
struct fsys_reiser_info
{
/* The last read item head */
struct item_head *current_ih;
/* The last read item */
char *current_item;
/* The information for the currently opened file */
struct fsys_reiser_fileinfo fileinfo;
/* The start of the journal */
__u32 journal_block;
/* The size of the journal */
__u32 journal_block_count;
/* The first valid descriptor block in journal
(relative to journal_block) */
__u32 journal_first_desc;
/* The ReiserFS version. */
__u16 version;
/* The current depth of the reiser tree. */
__u16 tree_depth;
/* SECTOR_SIZE << blocksize_shift == blocksize. */
__u8 blocksize_shift;
/* 1 << full_blocksize_shift == blocksize. */
__u8 fullblocksize_shift;
/* The reiserfs block size (must be a power of 2) */
__u16 blocksize;
/* The number of cached tree nodes */
__u16 cached_slots;
/* The number of valid transactions in journal */
__u16 journal_transactions;
unsigned int blocks[MAX_HEIGHT];
unsigned int next_key_nr[MAX_HEIGHT];
};
/* The cached s+tree blocks in FSYS_BUF, see below
* for a more detailed description.
*/
#define ROOT ((char *) ((int) FSYS_BUF))
#define CACHE(i) (ROOT + ((i) << INFO->fullblocksize_shift))
#define LEAF CACHE (DISK_LEAF_NODE_LEVEL)
#define BLOCKHEAD(cache) ((struct block_head *) cache)
#define ITEMHEAD ((struct item_head *) ((int) LEAF + BLKH_SIZE))
#define KEY(cache) ((struct key *) ((int) cache + BLKH_SIZE))
#define DC(cache) ((struct disk_child *) \
((int) cache + BLKH_SIZE + KEY_SIZE * nr_item))
/* The fsys_reiser_info block.
*/
#define INFO \
((struct fsys_reiser_info *) ((int) FSYS_BUF + FSYSREISER_CACHE_SIZE))
/*
* The journal cache. For each transaction it contains the number of
* blocks followed by the real block numbers of this transaction.
*
* If the block numbers of some transaction won't fit in this space,
* this list is stopped with a 0xffffffff marker and the remaining
* uncommitted transactions aren't cached.
*/
#define JOURNAL_START ((__u32 *) (INFO + 1))
#define JOURNAL_END ((__u32 *) (FSYS_BUF + FSYS_BUFLEN))
static __inline__ unsigned long
log2 (unsigned long word)
{
#ifdef __I386__
__asm__ ("bsfl %1,%0"
: "=r" (word)
: "r" (word));
return word;
#else
int i;
for(i=0; i<(8*sizeof(word)); i++)
if ((1<<i) & word)
return i;
return 0;
#endif
}
static __inline__ int
is_power_of_two (unsigned long word)
{
return (word & -word) == word;
}
extern const char *bb_mode_string(int mode);
extern int reiserfs_devread (int sector, int byte_offset, int byte_len, char *buf);

2
include/cmd_confdefs.h
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@ -87,6 +87,7 @@
#define CFG_CMD_IMLS 0x0020000000000000U /* List all found images */
#define CFG_CMD_ITEST 0x0040000000000000U /* Integer (and string) test */
#define CFG_CMD_NFS 0x0080000000000000U /* NFS support */
#define CFG_CMD_REISER 0x0100000000000000U /* Reiserfs support */
#define CFG_CMD_ALL 0xFFFFFFFFFFFFFFFFU /* ALL commands */
@ -124,6 +125,7 @@
CFG_CMD_PING | \
CFG_CMD_PORTIO | \
CFG_CMD_REGINFO | \
CFG_CMD_REISER | \
CFG_CMD_SAVES | \
CFG_CMD_SCSI | \
CFG_CMD_SDRAM | \

83
include/reiserfs.h
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@ -0,0 +1,83 @@
/*
* Copyright 2000-2002 by Hans Reiser, licensing governed by reiserfs/README
*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2000, 2001 Free Software Foundation, Inc.
*
* (C) Copyright 2003 Sysgo Real-Time Solutions, AG <www.elinos.com>
* Pavel Bartusek <pba@sysgo.de>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/* An implementation for the ReiserFS filesystem ported from GRUB.
* Some parts of this code (mainly the structures and defines) are
* from the original reiser fs code, as found in the linux kernel.
*/
#define SECTOR_SIZE 0x200
#define SECTOR_BITS 9
/* Error codes */
typedef enum
{
ERR_NONE = 0,
ERR_BAD_FILENAME,
ERR_BAD_FILETYPE,
ERR_BAD_GZIP_DATA,
ERR_BAD_GZIP_HEADER,
ERR_BAD_PART_TABLE,
ERR_BAD_VERSION,
ERR_BELOW_1MB,
ERR_BOOT_COMMAND,
ERR_BOOT_FAILURE,
ERR_BOOT_FEATURES,
ERR_DEV_FORMAT,
ERR_DEV_VALUES,
ERR_EXEC_FORMAT,
ERR_FILELENGTH,
ERR_FILE_NOT_FOUND,
ERR_FSYS_CORRUPT,
ERR_FSYS_MOUNT,
ERR_GEOM,
ERR_NEED_LX_KERNEL,
ERR_NEED_MB_KERNEL,
ERR_NO_DISK,
ERR_NO_PART,
ERR_NUMBER_PARSING,
ERR_OUTSIDE_PART,
ERR_READ,
ERR_SYMLINK_LOOP,
ERR_UNRECOGNIZED,
ERR_WONT_FIT,
ERR_WRITE,
ERR_BAD_ARGUMENT,
ERR_UNALIGNED,
ERR_PRIVILEGED,
ERR_DEV_NEED_INIT,
ERR_NO_DISK_SPACE,
ERR_NUMBER_OVERFLOW,
MAX_ERR_NUM
} reiserfs_error_t;
extern int reiserfs_set_blk_dev(block_dev_desc_t *rbdd, int part);
extern int reiserfs_ls (char *dirname);
extern int reiserfs_open (char *filename);
extern int reiserfs_read (char *buf, unsigned len);
extern int reiserfs_mount (unsigned part_length);
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