filesystem support
git-svn-id: svn://svn.coreboot.org/coreboot/trunk@1398 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
diff --git a/src/stream/Config.lb b/src/stream/Config.lb
index 2656774..5596ab6 100644
--- a/src/stream/Config.lb
+++ b/src/stream/Config.lb
@@ -1,5 +1,6 @@
uses CONFIG_ROM_STREAM
uses CONFIG_IDE_STREAM
+uses CONFIG_FS_STREAM
if CONFIG_ROM_STREAM
object rom_stream.o
@@ -8,3 +9,8 @@
if CONFIG_IDE_STREAM
object ide_stream.o
end
+
+if CONFIG_FS_STREAM
+ object fs_stream.o
+ dir fs
+end
diff --git a/src/stream/fs/Config.lb b/src/stream/fs/Config.lb
new file mode 100644
index 0000000..43c18c5
--- /dev/null
+++ b/src/stream/fs/Config.lb
@@ -0,0 +1,10 @@
+object blockdev.o
+object vfs.o
+
+if CONFIG_FS_EXT2
+ object ext2fs.o
+end
+
+if CONFIG_FS_ISO9660
+ object iso9660.o
+end
diff --git a/src/stream/fs/blockdev.c b/src/stream/fs/blockdev.c
new file mode 100644
index 0000000..336f435
--- /dev/null
+++ b/src/stream/fs/blockdev.c
@@ -0,0 +1,401 @@
+#include <console/console.h>
+#include <fs/fs.h>
+#include <arch/io.h>
+#include <string.h>
+#include <pc80/ide.h>
+#include <arch/byteorder.h>
+
+#define NUM_CACHE 64
+static unsigned char buf_cache[NUM_CACHE][512];
+static unsigned long cache_sect[NUM_CACHE];
+
+static char dev_name[256];
+
+int dev_type = -1;
+int dev_drive = -1;
+unsigned long part_start;
+unsigned long part_length;
+int using_devsize;
+
+unsigned long long simple_strtoull(const char *cp,char **endp,unsigned int base)
+{
+ unsigned long long result = 0,value;
+
+ if (!base) {
+ base = 10;
+ if (*cp == '0') {
+ base = 8;
+ cp++;
+ if ((*cp == 'x') && isxdigit(cp[1])) {
+ cp++;
+ base = 16;
+ }
+ }
+ }
+ while (isxdigit(*cp) && (value = isdigit(*cp) ? *cp-'0' : (islower(*cp)
+ ? toupper(*cp) : *cp)-'A'+10) < base) {
+ result = result*base + value;
+ cp++;
+ }
+ if (endp)
+ *endp = (char *)cp;
+ return result;
+}
+
+unsigned long long strtoull_with_suffix(const char *cp,char **endp,unsigned int base)
+{
+ unsigned long long result;
+
+ if (!endp) {
+ return 0;
+ }
+ result = simple_strtoull(cp, endp, base);
+ switch (toupper(**endp)) {
+ case 'K':
+ result <<= 10;
+ ++*endp;
+ break;
+ case 'M':
+ result <<= 20;
+ ++*endp;
+ break;
+ case 'G':
+ result <<= 30;
+ ++*endp;
+ break;
+ }
+ return result;
+}
+
+unsigned int get_le32(const unsigned char *p)
+{
+ return ((unsigned int) p[0] << 0)
+ | ((unsigned int) p[1] << 8)
+ | ((unsigned int) p[2] << 16)
+ | ((unsigned int) p[3] << 24);
+}
+
+static inline int has_pc_part_magic(unsigned char *sect)
+{
+ return sect[510]==0x55 && sect[511]==0xAA;
+}
+
+static inline int is_pc_extended_part(unsigned char type)
+{
+ return type==5 || type==0xf || type==0x85;
+}
+
+/* IBM-PC/MS-DOS style partitioning scheme */
+static int open_pc_partition(int part, unsigned long *start_p,
+ unsigned long *length_p)
+{
+ /* Layout of PC partition table */
+ struct pc_partition {
+ unsigned char boot;
+ unsigned char head;
+ unsigned char sector;
+ unsigned char cyl;
+ unsigned char type;
+ unsigned char e_head;
+ unsigned char e_sector;
+ unsigned char e_cyl;
+ unsigned char start_sect[4]; /* unaligned little endian */
+ unsigned char nr_sects[4]; /* ditto */
+ } *p;
+ unsigned char buf[512];
+
+ /* PC partition probe */
+ if (!devread(0, 0, sizeof buf, buf)) {
+ printk_debug("device read failed\n");
+ return 0;
+ }
+ if (!has_pc_part_magic(buf)) {
+ printk_debug("pc partition magic number not found\n");
+ //printk_debug_hexdump(buf, 512);
+ return PARTITION_UNKNOWN;
+ }
+ p = (struct pc_partition *) (buf + 0x1be);
+ if (part < 4) {
+ /* Primary partition */
+ p += part;
+ if (p->type==0 || is_pc_extended_part(p->type)) {
+ printk_info("Partition %d does not exist\n", part+1);
+ return 0;
+ }
+ *start_p = get_le32(p->start_sect);
+ *length_p = get_le32(p->nr_sects);
+ return 1;
+ } else {
+ /* Extended partition */
+ int i;
+ int cur_part;
+ unsigned long ext_start, cur_table;
+ /* Search for the extended partition
+ * which contains logical partitions */
+ for (i = 0; i < 4; i++) {
+ if (is_pc_extended_part(p[i].type))
+ break;
+ }
+ if (i >= 4) {
+ printk_info("Extended partition not found\n");
+ return 0;
+ }
+ printk_debug("Extended partition at %d\n", i+1);
+ /* Visit each logical partition labels */
+ ext_start = get_le32(p[i].start_sect);
+ cur_table = ext_start;
+ cur_part = 4;
+ for (;;) {
+ printk_debug("cur_part=%d at %lu\n", cur_part, cur_table);
+ if (!devread(cur_table, 0, sizeof buf, buf))
+ return 0;
+ if (!has_pc_part_magic(buf)) {
+ printk_debug("no magic\n");
+ break;
+ }
+
+ p = (struct pc_partition *) (buf + 0x1be);
+ /* First entry is the logical partition */
+ if (cur_part == part) {
+ if (p->type==0) {
+ printk_info("Partition %d is empty\n", part+1);
+ return 0;
+ }
+ *start_p = cur_table + get_le32(p->start_sect);
+ *length_p = get_le32(p->nr_sects);
+ return 1;
+ }
+ /* Second entry is link to next partition */
+ if (!is_pc_extended_part(p[1].type)) {
+ printk_debug("no link\n");
+ break;
+ }
+ cur_table = ext_start + get_le32(p[1].start_sect);
+
+ cur_part++;
+ }
+ printk_info("Logical partition %d not exist\n", part+1);
+ return 0;
+ }
+}
+
+static void flush_cache(void)
+{
+ int i;
+ for (i = 0; i < NUM_CACHE; i++)
+ cache_sect[i] = (unsigned long) -1;
+}
+
+static int parse_device_name(const char *name, int *type, int *drive,
+ int *part, uint64_t *offset, uint64_t *length)
+{
+ *offset = *length = 0;
+
+ if (memcmp(name, "hd", 2) == 0) {
+ *type = DISK_IDE;
+ name += 2;
+ if (*name < 'a' || *name > 'z') {
+ printk_info("Invalid drive\n");
+ return 0;
+ }
+ *drive = *name - 'a';
+ name++;
+ } else if (memcmp(name, "mem", 3) == 0) {
+ *type = DISK_MEM;
+ name += 3;
+ *drive = 0;
+ } else {
+ printk_info("Unknown device type\n");
+ return 0;
+ }
+
+ *part = (int) simple_strtoull(name, (char **)&name, 0);
+
+ if (*name == '@') {
+ name++;
+ *offset = strtoull_with_suffix(name, (char **)&name, 0);
+ if (*name == ',')
+ *length = strtoull_with_suffix(name+1, (char **)&name, 0);
+ printk_debug("offset=%#Lx length=%#Lx\n", *offset, *length);
+ }
+
+ if (*name != '\0') {
+ printk_info("Can't parse device name\n");
+ return 0;
+ }
+
+ return 1;
+}
+
+int devopen(const char *name, int *reopen)
+{
+ int type, drive, part;
+ uint64_t offset, length;
+ uint32_t disk_size = 0;
+
+ /* Don't re-open the device that's already open */
+ if (strcmp(name, dev_name) == 0) {
+ printk_debug("already open\n");
+ *reopen = 1;
+ return 1;
+ }
+ *reopen = 0;
+
+ if (!parse_device_name(name, &type, &drive, &part, &offset, &length)) {
+ printk_debug("failed to parse device name: %s\n", name);
+ return 0;
+ }
+
+ /* Do simple sanity check first */
+ if (offset & 0x1ff) {
+ printk_info("Device offset must be multiple of 512\n");
+ return 0;
+ }
+ if (length & 0x1ff) {
+ printk_info("WARNING: length is rounded up to multiple of 512\n");
+ length = (length + 0x1ff) & ~0x1ff;
+ }
+
+ switch (type) {
+ case DISK_IDE:
+ if (ide_probe(drive) != 0) {
+ printk_debug("failed to open ide\n");
+ return 0;
+ }
+ disk_size = (uint32_t) -1; /* FIXME */
+ break;
+ case DISK_MEM:
+ disk_size = 1 << (32 - 9); /* 4GB/512-byte */
+ break;
+ default:
+ printk_info("Unknown device type %d\n", type);
+ return 0;
+ }
+
+ if (dev_type != type || dev_drive != drive)
+ flush_cache();
+
+ /* start with whole disk */
+ dev_type = type;
+ dev_drive = drive;
+ part_start = 0;
+ part_length = disk_size;
+ using_devsize = 1;
+
+ if (part != 0) {
+ /* partition is specified */
+ int ret;
+ ret = open_pc_partition(part - 1, &part_start, &part_length);
+ if (ret == PARTITION_UNKNOWN) {
+ ret = open_eltorito_image(part - 1, &part_start, &part_length);
+ if (ret == PARTITION_UNKNOWN) {
+ printk_info("Unrecognized partitioning scheme\n");
+ return 0;
+ }
+ }
+ if (ret == 0) {
+ printk_debug("can't open partition %d\n", part);
+ return 0;
+ }
+
+ printk_debug("Partition %d start %lu length %lu\n", part,
+ part_start, part_length);
+ }
+
+ if (offset) {
+ if (offset >= (uint64_t) part_length << 9) {
+ printk_info("Device offset is too high\n");
+ return 0;
+ }
+ part_start += offset >> 9;
+ part_length -= offset >> 9;
+ printk_debug("after offset: start %lu, length %lu\n", part_start, part_length);
+ }
+
+ if (length) {
+ if (length > (uint64_t) part_length << 9) {
+ printk_info("Specified length exceeds the size of device\n");
+ return 0;
+ }
+ part_length = length >> 9;
+ printk_debug("after length: length %lu\n", part_length);
+ using_devsize = 0;
+ }
+
+ strncpy(dev_name, name, sizeof dev_name-1);
+
+ return 1;
+}
+
+/* Read a sector from opened device with simple/stupid buffer cache */
+static void *read_sector(unsigned long sector)
+{
+ unsigned int hash;
+ void *buf;
+
+ /* If reading memory, just return the memory as the buffer */
+ if (dev_type == DISK_MEM) {
+ unsigned long phys = sector << 9;
+ //printk_debug("mem: %#lx\n", phys);
+ return (void *)phys;
+ }
+
+ /* Search in the cache */
+ hash = sector % NUM_CACHE;
+ buf = buf_cache[hash];
+ if (cache_sect[hash] != sector) {
+ cache_sect[hash] = (unsigned long) -1;
+ switch (dev_type) {
+ case DISK_IDE:
+ if (ide_read(dev_drive, sector, buf) != 0)
+ goto readerr;
+ break;
+ default:
+ printk_info("read_sector: device not open\n");
+ return 0;
+ }
+ cache_sect[hash] = sector;
+ }
+ return buf;
+
+readerr:
+ printk_info("Disk read error dev=%d drive=%d sector=%lu\n",
+ dev_type, dev_drive, sector);
+ dev_name[0] = '\0'; /* force re-open the device next time */
+ return 0;
+}
+
+int devread(unsigned long sector, unsigned long byte_offset,
+ unsigned long byte_len, void *buf)
+{
+ char *sector_buffer;
+ char *dest = buf;
+ unsigned long len;
+
+ sector += byte_offset >> 9;
+ byte_offset &= 0x1ff;
+
+ if (sector + ((byte_len + 0x1ff) >> 9) > part_length) {
+ printk_info("Attempt to read out of device/partition\n");
+ printk_debug("sector=%lu part_length=%lu byte_len=%lu\n",
+ sector, part_length, byte_len);
+ return 0;
+ }
+
+ while (byte_len > 0) {
+ sector_buffer = read_sector(part_start + sector);
+ if (!sector_buffer) {
+ printk_debug("read sector failed\n");
+ return 0;
+ }
+ len = 512 - byte_offset;
+ if (len > byte_len)
+ len = byte_len;
+ memcpy(dest, sector_buffer + byte_offset, len);
+ sector++;
+ byte_offset = 0;
+ byte_len -= len;
+ dest += len;
+ }
+ return 1;
+}
diff --git a/src/stream/fs/ext2fs.c b/src/stream/fs/ext2fs.c
new file mode 100644
index 0000000..e57a9f1
--- /dev/null
+++ b/src/stream/fs/ext2fs.c
@@ -0,0 +1,793 @@
+/*
+ * GRUB -- GRand Unified Bootloader
+ * Copyright (C) 1999, 2001 Free Software Foundation, Inc.
+ *
+ * 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 <console/console.h>
+#include <fs/fs.h>
+#include <string.h>
+#include <arch/byteorder.h>
+
+static int mapblock1, mapblock2;
+
+/* sizes are always in bytes, BLOCK values are always in DEV_BSIZE (sectors) */
+#define DEV_BSIZE 512
+
+/* include/linux/fs.h */
+#define BLOCK_SIZE 1024 /* initial block size for superblock read */
+/* made up, defaults to 1 but can be passed via mount_opts */
+#define WHICH_SUPER 1
+/* kind of from fs/ext2/super.c */
+#define SBLOCK (WHICH_SUPER * BLOCK_SIZE / DEV_BSIZE) /* = 2 */
+
+/* include/asm-i386/types.h */
+typedef __signed__ char __s8;
+typedef unsigned char __u8;
+typedef __signed__ short __s16;
+typedef unsigned short __u16;
+typedef __signed__ int __s32;
+typedef unsigned int __u32;
+
+/*
+ * Constants relative to the data blocks, from ext2_fs.h
+ */
+#define EXT2_NDIR_BLOCKS 12
+#define EXT2_IND_BLOCK EXT2_NDIR_BLOCKS
+#define EXT2_DIND_BLOCK (EXT2_IND_BLOCK + 1)
+#define EXT2_TIND_BLOCK (EXT2_DIND_BLOCK + 1)
+#define EXT2_N_BLOCKS (EXT2_TIND_BLOCK + 1)
+
+/* include/linux/ext2_fs.h */
+struct ext2_super_block
+ {
+ __u32 s_inodes_count; /* Inodes count */
+ __u32 s_blocks_count; /* Blocks count */
+ __u32 s_r_blocks_count; /* Reserved blocks count */
+ __u32 s_free_blocks_count; /* Free blocks count */
+ __u32 s_free_inodes_count; /* Free inodes count */
+ __u32 s_first_data_block; /* First Data Block */
+ __u32 s_log_block_size; /* Block size */
+ __s32 s_log_frag_size; /* Fragment size */
+ __u32 s_blocks_per_group; /* # Blocks per group */
+ __u32 s_frags_per_group; /* # Fragments per group */
+ __u32 s_inodes_per_group; /* # Inodes per group */
+ __u32 s_mtime; /* Mount time */
+ __u32 s_wtime; /* Write time */
+ __u16 s_mnt_count; /* Mount count */
+ __s16 s_max_mnt_count; /* Maximal mount count */
+ __u16 s_magic; /* Magic signature */
+ __u16 s_state; /* File system state */
+ __u16 s_errors; /* Behaviour when detecting errors */
+ __u16 s_pad;
+ __u32 s_lastcheck; /* time of last check */
+ __u32 s_checkinterval; /* max. time between checks */
+ __u32 s_creator_os; /* OS */
+ __u32 s_rev_level; /* Revision level */
+ __u16 s_def_resuid; /* Default uid for reserved blocks */
+ __u16 s_def_resgid; /* Default gid for reserved blocks */
+ __u32 s_reserved[235]; /* Padding to the end of the block */
+ };
+
+struct ext2_group_desc
+ {
+ __u32 bg_block_bitmap; /* Blocks bitmap block */
+ __u32 bg_inode_bitmap; /* Inodes bitmap block */
+ __u32 bg_inode_table; /* Inodes table block */
+ __u16 bg_free_blocks_count; /* Free blocks count */
+ __u16 bg_free_inodes_count; /* Free inodes count */
+ __u16 bg_used_dirs_count; /* Directories count */
+ __u16 bg_pad;
+ __u32 bg_reserved[3];
+ };
+
+struct ext2_inode
+ {
+ __u16 i_mode; /* File mode */
+ __u16 i_uid; /* Owner Uid */
+ __u32 i_size; /* 4: Size in bytes */
+ __u32 i_atime; /* Access time */
+ __u32 i_ctime; /* 12: Creation time */
+ __u32 i_mtime; /* Modification time */
+ __u32 i_dtime; /* 20: Deletion Time */
+ __u16 i_gid; /* Group Id */
+ __u16 i_links_count; /* 24: Links count */
+ __u32 i_blocks; /* Blocks count */
+ __u32 i_flags; /* 32: File flags */
+ union
+ {
+ struct
+ {
+ __u32 l_i_reserved1;
+ }
+ linux1;
+ struct
+ {
+ __u32 h_i_translator;
+ }
+ hurd1;
+ struct
+ {
+ __u32 m_i_reserved1;
+ }
+ masix1;
+ }
+ osd1; /* OS dependent 1 */
+ __u32 i_block[EXT2_N_BLOCKS]; /* 40: Pointers to blocks */
+ __u32 i_version; /* File version (for NFS) */
+ __u32 i_file_acl; /* File ACL */
+ __u32 i_dir_acl; /* Directory ACL */
+ __u32 i_faddr; /* Fragment address */
+ union
+ {
+ struct
+ {
+ __u8 l_i_frag; /* Fragment number */
+ __u8 l_i_fsize; /* Fragment size */
+ __u16 i_pad1;
+ __u32 l_i_reserved2[2];
+ }
+ linux2;
+ struct
+ {
+ __u8 h_i_frag; /* Fragment number */
+ __u8 h_i_fsize; /* Fragment size */
+ __u16 h_i_mode_high;
+ __u16 h_i_uid_high;
+ __u16 h_i_gid_high;
+ __u32 h_i_author;
+ }
+ hurd2;
+ struct
+ {
+ __u8 m_i_frag; /* Fragment number */
+ __u8 m_i_fsize; /* Fragment size */
+ __u16 m_pad1;
+ __u32 m_i_reserved2[2];
+ }
+ masix2;
+ }
+ osd2; /* OS dependent 2 */
+ };
+
+/* linux/limits.h */
+#define NAME_MAX 255 /* # chars in a file name */
+
+/* linux/posix_type.h */
+typedef long linux_off_t;
+
+/* linux/ext2fs.h */
+#define EXT2_NAME_LEN 255
+struct ext2_dir_entry
+ {
+ __u32 inode; /* Inode number */
+ __u16 rec_len; /* Directory entry length */
+ __u8 name_len; /* Name length */
+ __u8 file_type;
+ char name[EXT2_NAME_LEN]; /* File name */
+ };
+
+/* linux/ext2fs.h */
+/*
+ * EXT2_DIR_PAD defines the directory entries boundaries
+ *
+ * NOTE: It must be a multiple of 4
+ */
+#define EXT2_DIR_PAD 4
+#define EXT2_DIR_ROUND (EXT2_DIR_PAD - 1)
+#define EXT2_DIR_REC_LEN(name_len) (((name_len) + 8 + EXT2_DIR_ROUND) & \
+ ~EXT2_DIR_ROUND)
+
+
+/* ext2/super.c */
+#define log2(n) ffz(~(n))
+
+#define EXT2_SUPER_MAGIC 0xEF53 /* include/linux/ext2_fs.h */
+#define EXT2_ROOT_INO 2 /* include/linux/ext2_fs.h */
+#define PATH_MAX 1024 /* include/linux/limits.h */
+#define MAX_LINK_COUNT 5 /* number of symbolic links to follow */
+
+/* made up, these are pointers into FSYS_BUF */
+/* read once, always stays there: */
+#define SUPERBLOCK \
+ ((struct ext2_super_block *)(FSYS_BUF))
+#define GROUP_DESC \
+ ((struct ext2_group_desc *) \
+ ((int)SUPERBLOCK + sizeof(struct ext2_super_block)))
+#define INODE \
+ ((struct ext2_inode *)((int)GROUP_DESC + EXT2_BLOCK_SIZE(SUPERBLOCK)))
+#define DATABLOCK1 \
+ ((int)((int)INODE + sizeof(struct ext2_inode)))
+#define DATABLOCK2 \
+ ((int)((int)DATABLOCK1 + EXT2_BLOCK_SIZE(SUPERBLOCK)))
+
+/* linux/ext2_fs.h */
+#define EXT2_ADDR_PER_BLOCK(s) (EXT2_BLOCK_SIZE(s) / sizeof (__u32))
+#define EXT2_ADDR_PER_BLOCK_BITS(s) (log2(EXT2_ADDR_PER_BLOCK(s)))
+
+/* linux/ext2_fs.h */
+#define EXT2_BLOCK_SIZE_BITS(s) (le32_to_cpu((s)->s_log_block_size) + 10)
+/* kind of from ext2/super.c */
+#define EXT2_BLOCK_SIZE(s) (1 << EXT2_BLOCK_SIZE_BITS(s))
+/* linux/ext2fs.h */
+#define EXT2_DESC_PER_BLOCK(s) \
+ (EXT2_BLOCK_SIZE(s) / sizeof (struct ext2_group_desc))
+/* linux/stat.h */
+#define S_IFMT 00170000
+#define S_IFLNK 0120000
+#define S_IFREG 0100000
+#define S_IFDIR 0040000
+#define S_ISLNK(m) (((m) & S_IFMT) == S_IFLNK)
+#define S_ISREG(m) (((m) & S_IFMT) == S_IFREG)
+#define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR)
+
+/* include/asm-i386/bitops.h */
+/*
+ * ffz = Find First Zero in word. Undefined if no zero exists,
+ * so code should check against ~0UL first..
+ */
+#ifndef PPC
+static __inline__ unsigned long
+ffz (unsigned long word)
+{
+ __asm__ ("bsfl %1,%0"
+: "=r" (word)
+: "r" (~word));
+ return word;
+}
+#else /* !PPC */
+static __inline__ unsigned long
+ __ilog2(unsigned long x)
+{
+ unsigned long lz;
+
+ asm ("cntlzw %0,%1" : "=r" (lz) : "r" (x));
+ return 31 - lz;
+}
+static __inline__ unsigned long
+ffz(unsigned long x)
+{
+ if ((x = ~x) == 0)
+ return 32;
+ return __ilog2(x & -x);
+}
+#endif
+
+/* check filesystem types and read superblock into memory buffer */
+int
+ext2fs_mount (void)
+{
+ int retval = 1;
+
+ if ((((current_drive & 0x80) || (current_slice != 0))
+ && (current_slice != PC_SLICE_TYPE_EXT2FS)
+ && (current_slice != PC_SLICE_TYPE_LINUX_RAID)
+ && (! IS_PC_SLICE_TYPE_BSD_WITH_FS (current_slice, FS_EXT2FS))
+ && (! IS_PC_SLICE_TYPE_BSD_WITH_FS (current_slice, FS_OTHER)))
+ || part_length < (SBLOCK + (sizeof (struct ext2_super_block) / DEV_BSIZE))
+ || !devread (SBLOCK, 0, sizeof (struct ext2_super_block),
+ (char *) SUPERBLOCK)
+ || le16_to_cpu(SUPERBLOCK->s_magic) != EXT2_SUPER_MAGIC)
+ retval = 0;
+
+ return retval;
+}
+
+/* Takes a file system block number and reads it into BUFFER. */
+static int
+ext2_rdfsb (int fsblock, int buffer)
+{
+#ifdef E2DEBUG
+ printk_debug ("fsblock %d buffer %d\n", fsblock, buffer);
+#endif /* E2DEBUG */
+ return devread (fsblock * (EXT2_BLOCK_SIZE (SUPERBLOCK) / DEV_BSIZE), 0,
+ EXT2_BLOCK_SIZE (SUPERBLOCK), (char *) buffer);
+}
+
+/* from
+ ext2/inode.c:ext2_bmap()
+*/
+/* Maps LOGICAL_BLOCK (the file offset divided by the blocksize) into
+ a physical block (the location in the file system) via an inode. */
+static int
+ext2fs_block_map (int logical_block)
+{
+
+#ifdef E2DEBUG
+ unsigned char *i;
+ for (i = (unsigned char *) INODE;
+ i < ((unsigned char *) INODE + sizeof (struct ext2_inode));
+ i++)
+ {
+ printk_debug ("%c", "0123456789abcdef"[*i >> 4]);
+ printk_debug ("%c", "0123456789abcdef"[*i % 16]);
+ if (!((i + 1 - (unsigned char *) INODE) % 16))
+ {
+ printk_debug ("\n");
+ }
+ else
+ {
+ printk_debug (" ");
+ }
+ }
+ printk_debug ("logical block %d\n", logical_block);
+#endif /* E2DEBUG */
+
+ /* if it is directly pointed to by the inode, return that physical addr */
+ if (logical_block < EXT2_NDIR_BLOCKS)
+ {
+#ifdef E2DEBUG
+ printk_debug ("returning %d\n", (unsigned char *) (le32_to_cpu(INODE->i_block[logical_block])));
+ printk_debug ("returning %d\n", le32_to_cpu(INODE->i_block[logical_block]));
+#endif /* E2DEBUG */
+ return le32_to_cpu(INODE->i_block[logical_block]);
+ }
+ /* else */
+ logical_block -= EXT2_NDIR_BLOCKS;
+ /* try the indirect block */
+ if (logical_block < EXT2_ADDR_PER_BLOCK (SUPERBLOCK))
+ {
+ if (mapblock1 != 1
+ && !ext2_rdfsb (le32_to_cpu(INODE->i_block[EXT2_IND_BLOCK]), DATABLOCK1))
+ {
+ errnum = ERR_FSYS_CORRUPT;
+ return -1;
+ }
+ mapblock1 = 1;
+ return le32_to_cpu(((__u32 *) DATABLOCK1)[logical_block]);
+ }
+ /* else */
+ logical_block -= EXT2_ADDR_PER_BLOCK (SUPERBLOCK);
+ /* now try the double indirect block */
+ if (logical_block < (1 << (EXT2_ADDR_PER_BLOCK_BITS (SUPERBLOCK) * 2)))
+ {
+ int bnum;
+ if (mapblock1 != 2
+ && !ext2_rdfsb (le32_to_cpu(INODE->i_block[EXT2_DIND_BLOCK]), DATABLOCK1))
+ {
+ errnum = ERR_FSYS_CORRUPT;
+ return -1;
+ }
+ mapblock1 = 2;
+ if ((bnum = le32_to_cpu(((__u32 *) DATABLOCK1)
+ [logical_block >> EXT2_ADDR_PER_BLOCK_BITS (SUPERBLOCK)]))
+ != mapblock2
+ && !ext2_rdfsb (bnum, DATABLOCK2))
+ {
+ errnum = ERR_FSYS_CORRUPT;
+ return -1;
+ }
+ mapblock2 = bnum;
+ return le32_to_cpu(((__u32 *) DATABLOCK2)
+ [logical_block & (EXT2_ADDR_PER_BLOCK (SUPERBLOCK) - 1)]);
+ }
+ /* else */
+ mapblock2 = -1;
+ logical_block -= (1 << (EXT2_ADDR_PER_BLOCK_BITS (SUPERBLOCK) * 2));
+ if (mapblock1 != 3
+ && !ext2_rdfsb (le32_to_cpu(INODE->i_block[EXT2_TIND_BLOCK]), DATABLOCK1))
+ {
+ errnum = ERR_FSYS_CORRUPT;
+ return -1;
+ }
+ mapblock1 = 3;
+ if (!ext2_rdfsb (le32_to_cpu(((__u32 *) DATABLOCK1)
+ [logical_block >> (EXT2_ADDR_PER_BLOCK_BITS (SUPERBLOCK)
+ * 2)]),
+ DATABLOCK2))
+ {
+ errnum = ERR_FSYS_CORRUPT;
+ return -1;
+ }
+ if (!ext2_rdfsb (le32_to_cpu(((__u32 *) DATABLOCK2)
+ [(logical_block >> EXT2_ADDR_PER_BLOCK_BITS (SUPERBLOCK))
+ & (EXT2_ADDR_PER_BLOCK (SUPERBLOCK) - 1)]),
+ DATABLOCK2))
+ {
+ errnum = ERR_FSYS_CORRUPT;
+ return -1;
+ }
+ return le32_to_cpu(((__u32 *) DATABLOCK2)
+ [logical_block & (EXT2_ADDR_PER_BLOCK (SUPERBLOCK) - 1)]);
+}
+
+/* preconditions: all preconds of ext2fs_block_map */
+int
+ext2fs_read (char *buf, int len)
+{
+ int logical_block;
+ int offset;
+ int map;
+ int ret = 0;
+ int size = 0;
+
+#ifdef E2DEBUG
+ static char hexdigit[] = "0123456789abcdef";
+ unsigned char *i;
+ for (i = (unsigned char *) INODE;
+ i < ((unsigned char *) INODE + sizeof (struct ext2_inode));
+ i++)
+ {
+ printk_debug ("%c", hexdigit[*i >> 4]);
+ printk_debug ("%c", hexdigit[*i % 16]);
+ if (!((i + 1 - (unsigned char *) INODE) % 16))
+ {
+ printk_debug ("\n");
+ }
+ else
+ {
+ printk_debug (" ");
+ }
+ }
+#endif /* E2DEBUG */
+ while (len > 0)
+ {
+ /* find the (logical) block component of our location */
+ logical_block = filepos >> EXT2_BLOCK_SIZE_BITS (SUPERBLOCK);
+ offset = filepos & (EXT2_BLOCK_SIZE (SUPERBLOCK) - 1);
+ map = ext2fs_block_map (logical_block);
+#ifdef E2DEBUG
+ printk_debug ("map=%d\n", map);
+#endif /* E2DEBUG */
+ if (map < 0)
+ break;
+
+ size = EXT2_BLOCK_SIZE (SUPERBLOCK);
+ size -= offset;
+ if (size > len)
+ size = len;
+
+ disk_read_func = disk_read_hook;
+
+ devread (map * (EXT2_BLOCK_SIZE (SUPERBLOCK) / DEV_BSIZE),
+ offset, size, buf);
+
+ disk_read_func = 0;
+
+ buf += size;
+ len -= size;
+ filepos += size;
+ ret += size;
+ }
+
+ if (errnum)
+ ret = 0;
+
+ return ret;
+}
+
+
+/* Based on:
+ def_blk_fops points to
+ blkdev_open, which calls (I think):
+ sys_open()
+ do_open()
+ open_namei()
+ dir_namei() which accesses current->fs->root
+ fs->root was set during original mount:
+ (something)... which calls (I think):
+ ext2_read_super()
+ iget()
+ __iget()
+ read_inode()
+ ext2_read_inode()
+ uses desc_per_block_bits, which is set in ext2_read_super()
+ also uses group descriptors loaded during ext2_read_super()
+ lookup()
+ ext2_lookup()
+ ext2_find_entry()
+ ext2_getblk()
+
+*/
+
+/* preconditions: ext2fs_mount already executed, therefore supblk in buffer
+ * known as SUPERBLOCK
+ * returns: 0 if error, nonzero iff we were able to find the file successfully
+ * postconditions: on a nonzero return, buffer known as INODE contains the
+ * inode of the file we were trying to look up
+ * side effects: messes up GROUP_DESC buffer area
+ */
+int
+ext2fs_dir (char *dirname)
+{
+ int current_ino = EXT2_ROOT_INO; /* start at the root */
+ int updir_ino = current_ino; /* the parent of the current directory */
+ int group_id; /* which group the inode is in */
+ int group_desc; /* fs pointer to that group */
+ int desc; /* index within that group */
+ int ino_blk; /* fs pointer of the inode's information */
+ int str_chk = 0; /* used to hold the results of a string compare */
+ struct ext2_group_desc *gdp;
+ struct ext2_inode *raw_inode; /* inode info corresponding to current_ino */
+
+ char linkbuf[PATH_MAX]; /* buffer for following symbolic links */
+ int link_count = 0;
+
+ char *rest;
+ char ch; /* temp char holder */
+
+ int off; /* offset within block of directory entry (off mod blocksize) */
+ int loc; /* location within a directory */
+ int blk; /* which data blk within dir entry (off div blocksize) */
+ long map; /* fs pointer of a particular block from dir entry */
+ struct ext2_dir_entry *dp; /* pointer to directory entry */
+#ifdef E2DEBUG
+ unsigned char *i;
+#endif /* E2DEBUG */
+
+ /* loop invariants:
+ current_ino = inode to lookup
+ dirname = pointer to filename component we are cur looking up within
+ the directory known pointed to by current_ino (if any)
+ */
+
+ while (1)
+ {
+#ifdef E2DEBUG
+ printk_debug ("inode %d\n", current_ino);
+ printk_debug ("dirname=%s\n", dirname);
+#endif /* E2DEBUG */
+
+ /* look up an inode */
+ group_id = (current_ino - 1) / le32_to_cpu(SUPERBLOCK->s_inodes_per_group);
+ group_desc = group_id >> log2 (EXT2_DESC_PER_BLOCK (SUPERBLOCK));
+ desc = group_id & (EXT2_DESC_PER_BLOCK (SUPERBLOCK) - 1);
+#ifdef E2DEBUG
+ printk_debug ("ipg=%d, dpb=%d\n", le32_to_cpu(SUPERBLOCK->s_inodes_per_group),
+ EXT2_DESC_PER_BLOCK (SUPERBLOCK));
+ printk_debug ("group_id=%d group_desc=%d desc=%d\n", group_id, group_desc, desc);
+#endif /* E2DEBUG */
+ if (!ext2_rdfsb (
+ (WHICH_SUPER + group_desc + le32_to_cpu(SUPERBLOCK->s_first_data_block)),
+ (int) GROUP_DESC))
+ {
+ return 0;
+ }
+ gdp = GROUP_DESC;
+ ino_blk = le32_to_cpu(gdp[desc].bg_inode_table) +
+ (((current_ino - 1) % le32_to_cpu(SUPERBLOCK->s_inodes_per_group))
+ >> log2 (EXT2_BLOCK_SIZE (SUPERBLOCK) / sizeof (struct ext2_inode)));
+#ifdef E2DEBUG
+ printk_debug ("inode table fsblock=%d\n", ino_blk);
+#endif /* E2DEBUG */
+ if (!ext2_rdfsb (ino_blk, (int) INODE))
+ {
+ return 0;
+ }
+
+ /* reset indirect blocks! */
+ mapblock2 = mapblock1 = -1;
+
+ raw_inode = INODE +
+ ((current_ino - 1)
+ & (EXT2_BLOCK_SIZE (SUPERBLOCK) / sizeof (struct ext2_inode) - 1));
+#ifdef E2DEBUG
+ printk_debug ("ipb=%d, sizeof(inode)=%d\n",
+ (EXT2_BLOCK_SIZE (SUPERBLOCK) / sizeof (struct ext2_inode)),
+ sizeof (struct ext2_inode));
+ printk_debug ("inode=%x, raw_inode=%x\n", INODE, raw_inode);
+ printk_debug ("offset into inode table block=%d\n", (int) raw_inode - (int) INODE);
+ for (i = (unsigned char *) INODE; i <= (unsigned char *) raw_inode;
+ i++)
+ {
+ printk_debug ("%c", "0123456789abcdef"[*i >> 4]);
+ printk_debug ("%c", "0123456789abcdef"[*i % 16]);
+ if (!((i + 1 - (unsigned char *) INODE) % 16))
+ {
+ printk_debug ("\n");
+ }
+ else
+ {
+ printk_debug (" ");
+ }
+ }
+ printk_debug ("first word=%x\n", *((int *) raw_inode));
+#endif /* E2DEBUG */
+
+ /* copy inode to fixed location */
+ memmove ((void *) INODE, (void *) raw_inode, sizeof (struct ext2_inode));
+
+#ifdef E2DEBUG
+ printk_debug ("first word=%x\n", *((int *) INODE));
+#endif /* E2DEBUG */
+
+ /* If we've got a symbolic link, then chase it. */
+ if (S_ISLNK (le16_to_cpu(INODE->i_mode)))
+ {
+ int len;
+ if (++link_count > MAX_LINK_COUNT)
+ {
+ errnum = ERR_SYMLINK_LOOP;
+ return 0;
+ }
+
+ /* Find out how long our remaining name is. */
+ len = 0;
+ while (dirname[len] && !isspace (dirname[len]))
+ len++;
+
+ /* Get the symlink size. */
+ filemax = le32_to_cpu(INODE->i_size);
+ if (filemax + len > sizeof (linkbuf) - 2)
+ {
+ errnum = ERR_FILELENGTH;
+ return 0;
+ }
+
+ if (len)
+ {
+ /* Copy the remaining name to the end of the symlink data.
+ Note that DIRNAME and LINKBUF may overlap! */
+ memmove (linkbuf + filemax, dirname, len);
+ }
+ linkbuf[filemax + len] = '\0';
+
+ /* Read the symlink data. */
+ if (le32_to_cpu(INODE->i_blocks))
+ {
+ /* Read the necessary blocks, and reset the file pointer. */
+ len = file_read (linkbuf, filemax);
+ filepos = 0;
+ if (!len)
+ return 0;
+ }
+ else
+ {
+ /* Copy the data directly from the inode. */
+ len = filemax;
+ memmove (linkbuf, (char *) INODE->i_block, len);
+ }
+
+#ifdef E2DEBUG
+ printk_debug ("symlink=%s\n", linkbuf);
+#endif
+
+ dirname = linkbuf;
+ if (*dirname == '/')
+ {
+ /* It's an absolute link, so look it up in root. */
+ current_ino = EXT2_ROOT_INO;
+ updir_ino = current_ino;
+ }
+ else
+ {
+ /* Relative, so look it up in our parent directory. */
+ current_ino = updir_ino;
+ }
+
+ /* Try again using the new name. */
+ continue;
+ }
+
+ /* if end of filename, INODE points to the file's inode */
+ if (!*dirname || isspace (*dirname))
+ {
+ if (!S_ISREG (le16_to_cpu(INODE->i_mode)))
+ {
+ errnum = ERR_BAD_FILETYPE;
+ return 0;
+ }
+
+ filemax = le32_to_cpu(INODE->i_size);
+ return 1;
+ }
+
+ /* else we have to traverse a directory */
+ updir_ino = current_ino;
+
+ /* skip over slashes */
+ while (*dirname == '/')
+ dirname++;
+
+ /* if this isn't a directory of sufficient size to hold our file, abort */
+ if (!(le32_to_cpu(INODE->i_size)) || !S_ISDIR (le16_to_cpu(INODE->i_mode)))
+ {
+ errnum = ERR_BAD_FILETYPE;
+ return 0;
+ }
+
+ /* skip to next slash or end of filename (space) */
+ for (rest = dirname; (ch = *rest) && !isspace (ch) && ch != '/';
+ rest++);
+
+ /* look through this directory and find the next filename component */
+ /* invariant: rest points to slash after the next filename component */
+ *rest = 0;
+ loc = 0;
+
+ do
+ {
+
+#ifdef E2DEBUG
+ printk_debug ("dirname=%s, rest=%s, loc=%d\n", dirname, rest, loc);
+#endif /* E2DEBUG */
+
+ /* if our location/byte offset into the directory exceeds the size,
+ give up */
+ if (loc >= le32_to_cpu(INODE->i_size))
+ {
+ if (print_possibilities < 0)
+ {
+# if 0
+ putchar ('\n');
+# endif
+ }
+ else
+ {
+ errnum = ERR_FILE_NOT_FOUND;
+ *rest = ch;
+ }
+ return (print_possibilities < 0);
+ }
+
+ /* else, find the (logical) block component of our location */
+ blk = loc >> EXT2_BLOCK_SIZE_BITS (SUPERBLOCK);
+
+ /* we know which logical block of the directory entry we are looking
+ for, now we have to translate that to the physical (fs) block on
+ the disk */
+ map = ext2fs_block_map (blk);
+#ifdef E2DEBUG
+ printk_debug ("fs block=%d\n", map);
+#endif /* E2DEBUG */
+ mapblock2 = -1;
+ if ((map < 0) || !ext2_rdfsb (map, DATABLOCK2))
+ {
+ errnum = ERR_FSYS_CORRUPT;
+ *rest = ch;
+ return 0;
+ }
+ off = loc & (EXT2_BLOCK_SIZE (SUPERBLOCK) - 1);
+ dp = (struct ext2_dir_entry *) (DATABLOCK2 + off);
+ /* advance loc prematurely to next on-disk directory entry */
+ loc += le16_to_cpu(dp->rec_len);
+
+ /* NOTE: ext2fs filenames are NOT null-terminated */
+
+#ifdef E2DEBUG
+ printk_debug ("directory entry ino=%d\n", le32_to_cpu(dp->inode));
+ if (le32_to_cpu(dp->inode))
+ printk_debug ("entry=%s\n", dp->name);
+#endif /* E2DEBUG */
+
+ if (le32_to_cpu(dp->inode))
+ {
+ int saved_c = dp->name[dp->name_len];
+
+ dp->name[dp->name_len] = 0;
+ str_chk = substring (dirname, dp->name);
+
+# ifndef STAGE1_5
+ if (print_possibilities && ch != '/'
+ && (!*dirname || str_chk <= 0))
+ {
+ if (print_possibilities > 0)
+ print_possibilities = -print_possibilities;
+ print_a_completion (dp->name);
+ }
+# endif
+
+ dp->name[dp->name_len] = saved_c;
+ }
+
+ }
+ while (!le32_to_cpu(dp->inode) || (str_chk || (print_possibilities && ch != '/')));
+
+ current_ino = le32_to_cpu(dp->inode);
+ *(dirname = rest) = ch;
+ }
+ /* never get here */
+}
diff --git a/src/stream/fs/iso9660.c b/src/stream/fs/iso9660.c
new file mode 100644
index 0000000..489ea70
--- /dev/null
+++ b/src/stream/fs/iso9660.c
@@ -0,0 +1,337 @@
+/*
+ * ISO 9660 filesystem backend for GRUB (GRand Unified Bootloader)
+ * including Rock Ridge Extensions support
+ *
+ * Copyright (C) 1998, 1999 Kousuke Takai <tak@kmc.kyoto-u.ac.jp>
+ *
+ * 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.
+ */
+/*
+ * References:
+ * linux/fs/isofs/rock.[ch]
+ * mkisofs-1.11.1/diag/isoinfo.c
+ * mkisofs-1.11.1/iso9660.h
+ * (all are written by Eric Youngdale)
+ *
+ * Modifications by:
+ * Leonid Lisovskiy <lly@pisem.net> 2003
+ */
+
+/*
+ * Modified to make it work with FILO
+ * 2003-10 by SONE Takeshi
+ */
+
+#include <console/console.h>
+#include <fs/fs.h>
+#include <fs/iso9660.h>
+#include <string.h>
+
+struct iso_superblock {
+ unsigned long vol_sector;
+
+ unsigned long file_start;
+};
+
+#define ISO_SUPER ((struct iso_superblock *)(FSYS_BUF))
+#define PRIMDESC ((struct iso_primary_descriptor *)(FSYS_BUF + 2048))
+#define DIRREC ((struct iso_directory_record *)(FSYS_BUF + 4096))
+#define RRCONT_BUF ((unsigned char *)(FSYS_BUF + 6144))
+#define NAME_BUF ((unsigned char *)(FSYS_BUF + 8192))
+
+static int
+iso9660_devread (int sector, int byte_offset, int byte_len, char *buf)
+{
+ /* FILO uses 512-byte "soft" sector, and ISO-9660 uses 2048-byte
+ * CD-ROM sector */
+ return devread(sector<<2, byte_offset, byte_len, buf);
+}
+
+int
+iso9660_mount (void)
+{
+ unsigned int sector;
+
+ /*
+ * Because there is no defined slice type ID for ISO-9660 filesystem,
+ * this test will pass only either (1) if entire disk is used, or
+ * (2) if current partition is BSD style sub-partition whose ID is
+ * ISO-9660.
+ */
+ /*if ((current_partition != 0xFFFFFF)
+ && !IS_PC_SLICE_TYPE_BSD_WITH_FS(current_slice, FS_ISO9660))
+ return 0;*/
+
+ /*
+ * Currently, only FIRST session of MultiSession disks are supported !!!
+ */
+ for (sector = 16 ; sector < 32 ; sector++)
+ {
+ if (!iso9660_devread(sector, 0, sizeof(*PRIMDESC), (char *)PRIMDESC))
+ break;
+ /* check ISO_VD_PRIMARY and ISO_STANDARD_ID */
+ if (isonum_711(PRIMDESC->type) == ISO_VD_PRIMARY &&
+ !__builtin_memcmp(PRIMDESC->id, "CD001", 5))
+ {
+ ISO_SUPER->vol_sector = sector;
+ ISO_SUPER->file_start = 0;
+ fsmax = isonum_733(PRIMDESC->volume_space_size);
+ return 1;
+ }
+ }
+
+ return 0;
+}
+
+int
+iso9660_dir (char *dirname)
+{
+ struct iso_directory_record *idr;
+ RR_ptr_t rr_ptr;
+ struct rock_ridge *ce_ptr;
+ unsigned int pathlen;
+ int size;
+ unsigned int extent;
+ unsigned int rr_len;
+ unsigned char file_type;
+ unsigned char rr_flag;
+
+ idr = (struct iso_directory_record *)&PRIMDESC->root_directory_record;
+ ISO_SUPER->file_start = 0;
+
+ do
+ {
+ while (*dirname == '/') /* skip leading slashes */
+ dirname++;
+ /* pathlen = strcspn(dirname, "/\n\t "); */
+ for (pathlen = 0 ;
+ dirname[pathlen]
+ && !isspace(dirname[pathlen]) && dirname[pathlen] != '/' ;
+ pathlen++)
+ ;
+
+ size = isonum_733(idr->size);
+ extent = isonum_733(idr->extent);
+
+ while (size > 0)
+ {
+ if (!iso9660_devread(extent, 0, ISO_SECTOR_SIZE, (char *)DIRREC))
+ {
+ errnum = ERR_FSYS_CORRUPT;
+ return 0;
+ }
+ extent++;
+
+ idr = (struct iso_directory_record *)DIRREC;
+ for (; isonum_711(idr->length) > 0;
+ idr = (struct iso_directory_record *)((char *)idr + isonum_711(idr->length)) )
+ {
+ const char *name = idr->name;
+ unsigned int name_len = isonum_711(idr->name_len);
+
+ file_type = ((unsigned int)idr->flags & 2) ? ISO_DIRECTORY : ISO_REGULAR;
+ if (name_len == 1)
+ {
+ if ((name[0] == 0) || /* self */
+ (name[0] == 1)) /* parent */
+ continue;
+ }
+ if (name_len > 2 &&
+ name[name_len - 2] == ';' &&
+ name[name_len - 1] == '1')
+ {
+ name_len -= 2; /* truncate trailing file version */
+ if (name_len > 1 && name[name_len - 1] == '.')
+ name_len--; /* truncate trailing dot */
+ }
+
+ /*
+ * Parse Rock-Ridge extension
+ */
+ rr_len = (isonum_711(idr->length) - isonum_711(idr->name_len)
+ - (unsigned char)sizeof(struct iso_directory_record)
+ + (unsigned char)sizeof(idr->name));
+ rr_ptr.ptr = ((unsigned char *)idr + isonum_711(idr->name_len)
+ + sizeof(struct iso_directory_record)
+ - sizeof(idr->name));
+ if (rr_ptr.i & 1)
+ rr_ptr.i++, rr_len--;
+ ce_ptr = 0;
+ rr_flag = RR_FLAG_NM | RR_FLAG_PX;
+
+ while (rr_len >= 4)
+ {
+ if (rr_ptr.rr->version != 1)
+ {
+#ifndef STAGE1_5
+ if (debug)
+ printk_debug(
+ "Non-supported version (%d) RockRidge chunk "
+ "`%c%c'\n", rr_ptr.rr->version,
+ rr_ptr.rr->signature & 0xFF,
+ rr_ptr.rr->signature >> 8);
+#endif
+ }
+ else if (rr_ptr.rr->signature[0] == 'R'
+ && rr_ptr.rr->signature[1] == 'R'
+ && rr_ptr.rr->len >= 5)
+ rr_flag &= isonum_711(rr_ptr.rr->u.RR.flags);
+ else if (rr_ptr.rr->signature[0] == 'N'
+ && rr_ptr.rr->signature[1] == 'M')
+ {
+ name = rr_ptr.rr->u.NM.name;
+ name_len = rr_ptr.rr->len - 5;
+ rr_flag &= ~RR_FLAG_NM;
+ }
+ else if (rr_ptr.rr->signature[0] == 'P'
+ && rr_ptr.rr->signature[1] == 'X'
+ && rr_ptr.rr->len >= 36)
+ {
+ unsigned int mode = isonum_733(rr_ptr.rr->u.PX.mode);
+ file_type = ((mode & POSIX_S_IFMT)
+ == POSIX_S_IFREG
+ ? ISO_REGULAR
+ : ((mode & POSIX_S_IFMT)
+ == POSIX_S_IFDIR
+ ? ISO_DIRECTORY : ISO_OTHER));
+ rr_flag &= ~RR_FLAG_PX;
+ }
+ else if (rr_ptr.rr->signature[0] == 'C'
+ && rr_ptr.rr->signature[1] == 'E'
+ && rr_ptr.rr->len >= 28)
+ ce_ptr = rr_ptr.rr;
+ if (!rr_flag)
+ /*
+ * There is no more extension we expects...
+ */
+ break;
+ rr_len -= rr_ptr.rr->len;
+ rr_ptr.ptr += rr_ptr.rr->len;
+ if (rr_len < 4 && ce_ptr != 0)
+ {
+ /* preserve name before loading new extent. */
+ if( RRCONT_BUF <= (unsigned char *)name
+ && (unsigned char *)name < RRCONT_BUF + ISO_SECTOR_SIZE )
+ {
+ memcpy(NAME_BUF, name, name_len);
+ name = NAME_BUF;
+ }
+ rr_ptr.ptr = RRCONT_BUF + isonum_733(ce_ptr->u.CE.offset);
+ rr_len = isonum_733(ce_ptr->u.CE.size);
+ if (!iso9660_devread(isonum_733(ce_ptr->u.CE.extent), 0, ISO_SECTOR_SIZE, RRCONT_BUF))
+ {
+ errnum = 0; /* this is not fatal. */
+ break;
+ }
+ ce_ptr = 0;
+ }
+ } /* rr_len >= 4 */
+
+ filemax = MAXINT;
+ if (name_len >= pathlen
+ && !__builtin_memcmp(name, dirname, pathlen))
+ {
+ if (dirname[pathlen] == '/' || !print_possibilities)
+ {
+ /*
+ * DIRNAME is directory component of pathname,
+ * or we are to open a file.
+ */
+ if (pathlen == name_len)
+ {
+ if (dirname[pathlen] == '/')
+ {
+ if (file_type != ISO_DIRECTORY)
+ {
+ errnum = ERR_BAD_FILETYPE;
+ return 0;
+ }
+ goto next_dir_level;
+ }
+ if (file_type != ISO_REGULAR)
+ {
+ errnum = ERR_BAD_FILETYPE;
+ return 0;
+ }
+ ISO_SUPER->file_start = isonum_733(idr->extent);
+ filepos = 0;
+ filemax = isonum_733(idr->size);
+ return 1;
+ }
+ }
+ else /* Completion */
+ {
+#ifndef STAGE1_5
+ if (print_possibilities > 0)
+ print_possibilities = -print_possibilities;
+ memcpy(NAME_BUF, name, name_len);
+ NAME_BUF[name_len] = '\0';
+ print_a_completion (NAME_BUF);
+#endif
+ }
+ }
+ } /* for */
+
+ size -= ISO_SECTOR_SIZE;
+ } /* size>0 */
+
+ if (dirname[pathlen] == '/' || print_possibilities >= 0)
+ {
+ errnum = ERR_FILE_NOT_FOUND;
+ return 0;
+ }
+
+next_dir_level:
+ dirname += pathlen;
+
+ } while (*dirname == '/');
+
+ return 1;
+}
+
+int
+iso9660_read (char *buf, int len)
+{
+ int sector, blkoffset, size, ret;
+
+ if (ISO_SUPER->file_start == 0)
+ return 0;
+
+ ret = 0;
+ blkoffset = filepos & (ISO_SECTOR_SIZE - 1);
+ sector = filepos >> ISO_SECTOR_BITS;
+ while (len > 0)
+ {
+ size = ISO_SECTOR_SIZE - blkoffset;
+ if (size > len)
+ size = len;
+
+ disk_read_func = disk_read_hook;
+
+ if (!iso9660_devread(ISO_SUPER->file_start + sector, blkoffset, size, buf))
+ return 0;
+
+ disk_read_func = 0;
+
+ len -= size;
+ buf += size;
+ ret += size;
+ filepos += size;
+ sector++;
+ blkoffset = 0;
+ }
+
+ return ret;
+}
diff --git a/src/stream/fs/vfs.c b/src/stream/fs/vfs.c
new file mode 100644
index 0000000..401867c
--- /dev/null
+++ b/src/stream/fs/vfs.c
@@ -0,0 +1,190 @@
+/* Interface between GRUB's fs drivers and application code */
+
+#include <console/console.h>
+#include <fs/fs.h>
+#include <string.h>
+#include <stdlib.h>
+
+int filepos;
+int filemax;
+fs_error_t errnum;
+void (*disk_read_hook) (int, int, int);
+void (*disk_read_func) (int, int, int);
+char FSYS_BUF[FSYS_BUFLEN];
+int fsmax;
+
+struct fsys_entry {
+ char *name;
+ int (*mount_func) (void);
+ int (*read_func) (char *buf, int len);
+ int (*dir_func) (char *dirname);
+ void (*close_func) (void);
+ int (*embed_func) (int *start_sector, int needed_sectors);
+};
+
+struct fsys_entry fsys_table[] = {
+# ifdef CONFIG_FS_FAT
+ {"fat", fat_mount, fat_read, fat_dir, 0, 0},
+# endif
+# if CONFIG_FS_EXT2 == 1
+ {"ext2fs", ext2fs_mount, ext2fs_read, ext2fs_dir, 0, 0},
+# endif
+# ifdef CONFIG_FS_MINIX
+ {"minix", minix_mount, minix_read, minix_dir, 0, 0},
+# endif
+# ifdef CONFIG_FS_REISERFS
+ {"reiserfs", reiserfs_mount, reiserfs_read, reiserfs_dir, 0,
+ reiserfs_embed},
+# endif
+# ifdef CONFIG_FS_JFS
+ {"jfs", jfs_mount, jfs_read, jfs_dir, 0, jfs_embed},
+# endif
+# ifdef CONFIG_FS_XFS
+ {"xfs", xfs_mount, xfs_read, xfs_dir, 0, 0},
+# endif
+# if CONFIG_FS_ISO9660 == 1
+ {"iso9660", iso9660_mount, iso9660_read, iso9660_dir, 0, 0},
+# endif
+};
+
+/* NULLFS is used to read images from raw device */
+static int nullfs_dir(char *name)
+{
+ uint64_t dev_size;
+
+ if (name) {
+ printk_debug("can't have a named file\n");
+ return 0;
+ }
+
+ dev_size = (uint64_t) part_length << 9;
+ /* GRUB code doesn't like 2GB or bigger files */
+ if (dev_size > 0x7fffffff)
+ dev_size = 0x7fffffff;
+ filemax = dev_size;
+ return 1;
+}
+
+static int nullfs_read(char *buf, int len)
+{
+ if (devread(filepos>>9, filepos&0x1ff, len, buf)) {
+ filepos += len;
+ return len;
+ } else
+ return 0;
+}
+
+static struct fsys_entry nullfs =
+ {"nullfs", 0, nullfs_read, nullfs_dir, 0, 0};
+
+static struct fsys_entry *fsys;
+
+int mount_fs(void)
+{
+ int i;
+
+ for (i = 0; i < sizeof(fsys_table)/sizeof(fsys_table[0]); i++) {
+ if (fsys_table[i].mount_func()) {
+ fsys = &fsys_table[i];
+ printk_info("Mounted %s\n", fsys->name);
+ return 1;
+ }
+ }
+ fsys = 0;
+ printk_info("Unknown filesystem type\n");
+ return 0;
+}
+
+int file_open(const char *filename)
+{
+ char *dev = 0;
+ const char *path;
+ int len;
+ int retval = 0;
+ int reopen;
+
+ path = strchr(filename, ':');
+ if (path) {
+ len = path - filename;
+ path++;
+ dev = malloc(len + 1);
+ memcpy(dev, filename, len);
+ dev[len] = '\0';
+ } else {
+ /* No colon is given. Is this device or filename? */
+ if (filename[0] == '/') {
+ /* Anything starts with '/' must be a filename */
+ dev = 0;
+ path = filename;
+ } else {
+ dev = strdup(filename);
+ path = 0;
+ }
+ }
+ printk_debug("dev=%s, path=%s\n", dev, path);
+
+ if (dev && dev[0]) {
+ if (!devopen(dev, &reopen)) {
+ fsys = 0;
+ goto out;
+ }
+ if (!reopen)
+ fsys = 0;
+ }
+
+ if (path) {
+ if (!fsys || fsys==&nullfs) {
+ if (!mount_fs())
+ goto out;
+ }
+ using_devsize = 0;
+ if (!path[0]) {
+ printk_info("No filename is given\n");
+ goto out;
+ }
+ } else
+ fsys = &nullfs;
+
+ filepos = 0;
+ errnum = 0;
+ if (!fsys->dir_func((char *) path)) {
+ printk_info("File not found\n");
+ goto out;
+ }
+ retval = 1;
+out:
+ if (dev)
+ free(dev);
+ return retval;
+}
+
+int file_read(void *buf, unsigned long len)
+{
+ if (filepos < 0 || filepos > filemax)
+ filepos = filemax;
+ if (len < 0 || len > filemax-filepos)
+ len = filemax - filepos;
+ errnum = 0;
+ return fsys->read_func(buf, len);
+}
+
+int file_seek(unsigned long offset)
+{
+ filepos = offset;
+ return filepos;
+}
+
+unsigned long file_pos(void)
+{
+ return filepos;
+}
+
+unsigned long file_size(void)
+{
+ return filemax;
+}
+
+void file_close(void)
+{
+}
+
diff --git a/src/stream/fs_stream.c b/src/stream/fs_stream.c
new file mode 100644
index 0000000..7d911e6
--- /dev/null
+++ b/src/stream/fs_stream.c
@@ -0,0 +1,32 @@
+#include <console/console.h>
+#include <stdlib.h>
+#include <stddef.h>
+#include <stream/read_bytes.h>
+#include <string.h>
+#include <fs/fs.h>
+
+char *boot_file;
+
+int stream_init(void)
+{
+ return file_open(boot_file);
+}
+
+
+void stream_fini(void)
+{
+ return;
+}
+
+byte_offset_t stream_skip(byte_offset_t count)
+{
+ unsigned long pos = file_pos();
+ if (file_seek(count+pos) != count+pos)
+ return 0;
+ return count;
+}
+
+byte_offset_t stream_read(void *vdest, byte_offset_t count)
+{
+ return file_read(vdest, count);
+}
diff --git a/src/stream/ide_stream.c b/src/stream/ide_stream.c
index 0db2ac9..0dd9a91 100644
--- a/src/stream/ide_stream.c
+++ b/src/stream/ide_stream.c
@@ -4,10 +4,11 @@
#include <stream/read_bytes.h>
#include <delay.h>
#include <string.h>
+#include <pc80/ide.h>
-/* read a sector or a partial sector */
-extern int ide_read(int drive, unsigned long block, void * buffer);
-extern int ide_init(void);
+#ifndef IDE_BOOT_DRIVE
+#define IDE_BOOT_DRIVE 0
+#endif
static unsigned long offset;
int stream_init(void)
@@ -30,7 +31,7 @@
#else
offset = 0x7e00;
#endif
- res = ide_init();
+ res = ide_probe(IDE_BOOT_DRIVE);
delay(1);
return res;
}
@@ -40,27 +41,9 @@
return;
}
-#ifdef IDE_SWAB
-/* from string/swab.c */
-void
-swab (const char *from, char *to, int n)
-{
- n &= ~1;
- while (n > 1)
- {
- const char b0 = from[--n], b1 = from[--n];
- to[n] = b0;
- to[n + 1] = b1;
- }
-}
-#endif
-
static unsigned char buffer[512];
static unsigned int block_num = 0;
static unsigned int first_fill = 1;
-#ifndef IDE_BOOT_DRIVE
-#define IDE_BOOT_DRIVE 0
-#endif
static byte_offset_t stream_ide_read(void *vdest, byte_offset_t offset, byte_offset_t count)
{
byte_offset_t bytes = 0;
@@ -84,11 +67,7 @@
len = (count - bytes);
}
-#ifdef IDE_SWAB
- swab(buffer + byte_offset, dest, len);
-#else
memcpy(dest, buffer + byte_offset, len);
-#endif
offset += len;
bytes += len;