* 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
diff --git a/fs/Makefile b/fs/Makefile
index c773003..c750790 100644
--- a/fs/Makefile
+++ b/fs/Makefile
@@ -22,7 +22,7 @@
#
#
-SUBDIRS := jffs2 cramfs fdos fat
+SUBDIRS := jffs2 cramfs fdos fat reiserfs
.depend all:
@for dir in $(SUBDIRS) ; do \
diff --git a/fs/reiserfs/Makefile b/fs/reiserfs/Makefile
new file mode 100644
index 0000000..98a9a8d
--- /dev/null
+++ b/fs/reiserfs/Makefile
@@ -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
+
+#########################################################################
diff --git a/fs/reiserfs/dev.c b/fs/reiserfs/dev.c
new file mode 100644
index 0000000..72d62a6
--- /dev/null
+++ b/fs/reiserfs/dev.c
@@ -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 */
diff --git a/fs/reiserfs/mode_string.c b/fs/reiserfs/mode_string.c
new file mode 100644
index 0000000..b3f5389
--- /dev/null
+++ b/fs/reiserfs/mode_string.c
@@ -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 */
diff --git a/fs/reiserfs/reiserfs.c b/fs/reiserfs/reiserfs.c
new file mode 100644
index 0000000..ef4baf7
--- /dev/null
+++ b/fs/reiserfs/reiserfs.c
@@ -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 */
diff --git a/fs/reiserfs/reiserfs_private.h b/fs/reiserfs/reiserfs_private.h
new file mode 100644
index 0000000..295ce3b
--- /dev/null
+++ b/fs/reiserfs/reiserfs_private.h
@@ -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);