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e8dc6bdf9e
openwrt-xburst/obsolete-buildroot/sources/openwrt-wrt54g-linux.patch
mbm 9570c4f6c5 squashfs-2.0 
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@37 3c298f89-4303-0410-b956-a3cf2f4a3e73
2004-05-26 01:28:41 +00:00

5239 lines
166 KiB
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diff -Nurb src/linux/linux.orig/Makefile src/linux/linux/Makefile
--- src/linux/linux.orig/Makefile 2003-10-14 04:00:10.000000000 -0400
+++ src/linux/linux/Makefile 2004-05-25 21:12:24.000000000 -0400
@@ -17,7 +17,7 @@
FINDHPATH = $(HPATH)/asm $(HPATH)/linux $(HPATH)/scsi $(HPATH)/net $(HPATH)/math-emu
HOSTCC = gcc
-HOSTCFLAGS = -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer
+HOSTCFLAGS = -Wall -Wstrict-prototypes -Os -fomit-frame-pointer
CROSS_COMPILE =
@@ -88,7 +88,7 @@
CPPFLAGS := -D__KERNEL__ -I$(HPATH)
-CFLAGS := $(CPPFLAGS) -Wall -Wstrict-prototypes -Wno-trigraphs -O2 \
+CFLAGS := $(CPPFLAGS) -Wall -Wstrict-prototypes -Wno-trigraphs -Os \
-fno-strict-aliasing -fno-common
# Turn on -pg to instrument the kernel with calls to mcount().
diff -Nurb src/linux/linux.orig/arch/mips/brcm-boards/bcm947xx/setup.c src/linux/linux/arch/mips/brcm-boards/bcm947xx/setup.c
--- src/linux/linux.orig/arch/mips/brcm-boards/bcm947xx/setup.c 2003-11-11 09:08:46.000000000 -0500
+++ src/linux/linux/arch/mips/brcm-boards/bcm947xx/setup.c 2004-05-25 21:12:24.000000000 -0400
@@ -27,6 +27,7 @@
#include <linux/ext2_fs.h>
#include <linux/romfs_fs.h>
#include <linux/cramfs_fs.h>
+#include <linux/squashfs_fs.h>
#endif
#include <typedefs.h>
@@ -160,37 +161,38 @@
#ifdef CONFIG_MTD_PARTITIONS
static struct mtd_partition bcm947xx_parts[] = {
- { name: "pmon", offset: 0, size: 0, /*mask_flags: MTD_WRITEABLE,*/ },
+ { name: "pmon", offset: 0, size: 0, mask_flags: MTD_WRITEABLE, },
{ name: "linux", offset: 0, size: 0, },
{ name: "rootfs", offset: 0, size: 0, /*mask_flags: MTD_WRITEABLE,*/ },
{ name: "nvram", offset: 0, size: 0, },
+ { name: "OpenWrt", offset: 0, size: 0, },
{ name: NULL, },
};
-struct mtd_partition * __init
-init_mtd_partitions(struct mtd_info *mtd, size_t size)
+
+static int __init
+find_root(struct mtd_info *mtd, size_t size, struct mtd_partition *part)
{
- struct minix_super_block *minixsb;
- struct ext2_super_block *ext2sb;
- struct romfs_super_block *romfsb;
struct cramfs_super *cramfsb;
+ struct squashfs_super_block *squashfsb;
struct trx_header *trx;
+
unsigned char buf[512];
int off;
size_t len;
- minixsb = (struct minix_super_block *) buf;
- ext2sb = (struct ext2_super_block *) buf;
- romfsb = (struct romfs_super_block *) buf;
cramfsb = (struct cramfs_super *) buf;
+ squashfsb = (struct squashfs_super_block *) buf;
trx = (struct trx_header *) buf;
- /* Look at every 64 KB boundary */
- for (off = 0; off < size; off += (64 * 1024)) {
+ part->offset = 0;
+ part->size = 0;
+
+ for (off = 0; off < size; off += mtd->erasesize) {
memset(buf, 0xe5, sizeof(buf));
/*
- * Read block 0 to test for romfs and cramfs superblock
+ * Read block 0 to test for cramfs superblock
*/
if (MTD_READ(mtd, off, sizeof(buf), &len, buf) ||
len != sizeof(buf))
@@ -198,75 +200,105 @@
/* Try looking at TRX header for rootfs offset */
if (le32_to_cpu(trx->magic) == TRX_MAGIC) {
- bcm947xx_parts[1].offset = off;
if (le32_to_cpu(trx->offsets[1]) > off)
off = le32_to_cpu(trx->offsets[1]);
continue;
}
- /* romfs is at block zero too */
- if (romfsb->word0 == ROMSB_WORD0 &&
- romfsb->word1 == ROMSB_WORD1) {
- printk(KERN_NOTICE
- "%s: romfs filesystem found at block %d\n",
- mtd->name, off / BLOCK_SIZE);
- goto done;
- }
-
- /* so is cramfs */
+ /* need to find cramfs */
if (cramfsb->magic == CRAMFS_MAGIC) {
printk(KERN_NOTICE
"%s: cramfs filesystem found at block %d\n",
mtd->name, off / BLOCK_SIZE);
- goto done;
- }
- /*
- * Read block 1 to test for minix and ext2 superblock
- */
- if (MTD_READ(mtd, off + BLOCK_SIZE, sizeof(buf), &len, buf) ||
- len != sizeof(buf))
- continue;
-
- /* Try minix */
- if (minixsb->s_magic == MINIX_SUPER_MAGIC ||
- minixsb->s_magic == MINIX_SUPER_MAGIC2) {
- printk(KERN_NOTICE
- "%s: Minix filesystem found at block %d\n",
- mtd->name, off / BLOCK_SIZE);
+ part->size = cramfsb->size;
goto done;
}
- /* Try ext2 */
- if (ext2sb->s_magic == cpu_to_le16(EXT2_SUPER_MAGIC)) {
+ /* or squashfs */
+ if (squashfsb->s_magic == SQUASHFS_MAGIC) {
printk(KERN_NOTICE
- "%s: ext2 filesystem found at block %d\n",
+ "%s: squashfs filesystem found at block %d\n",
mtd->name, off / BLOCK_SIZE);
+ part->size = squashfsb->bytes_used+2048;
goto done;
}
- }
+ }
printk(KERN_NOTICE
- "%s: Couldn't find valid ROM disk image\n",
+ "%s: Couldn't find valid cramfs image\n",
mtd->name);
+ return -1;
+
+done:
+ part->offset = off;
+ return 0;
+}
+
+
+struct mtd_partition * __init
+init_mtd_partitions(struct mtd_info *mtd, size_t size)
+{
+
+ bcm947xx_parts[0].offset=0;
+ bcm947xx_parts[0].size=256*1024;
- done:
/* Find and size nvram */
bcm947xx_parts[3].offset = size - ROUNDUP(NVRAM_SPACE, mtd->erasesize);
bcm947xx_parts[3].size = size - bcm947xx_parts[3].offset;
/* Find and size rootfs */
- if (off < size) {
- bcm947xx_parts[2].offset = off;
- bcm947xx_parts[2].size = bcm947xx_parts[3].offset - bcm947xx_parts[2].offset;
- }
+ //if (off < size) {
+ // bcm947xx_parts[2].offset = off;
+ // bcm947xx_parts[2].size = bcm947xx_parts[3].offset - bcm947xx_parts[2].offset;
+ //}
+
+ /* Find and size rootfs */
+ find_root(mtd,size,&bcm947xx_parts[2]);
+
+
/* Size linux (kernel and rootfs) */
+ bcm947xx_parts[1].offset = bcm947xx_parts[0].size;
bcm947xx_parts[1].size = bcm947xx_parts[3].offset - bcm947xx_parts[1].offset;
+
+
+ /* calculate leftover flash, and assign it to the jffs partition */
+ size_t spot;
+ size_t len;
+ size_t mask;
+ // get the offset to the end of the root_fs
+ spot=bcm947xx_parts[2].offset+bcm947xx_parts[2].size;
+ // round it up to an erase size boundary
+ spot+=mtd->erasesize-1;
+ // mask the number to the boundary
+ mask=mtd->erasesize;
+ mask=mask-1;
+ mask=mask^0xffffffff;
+ spot&=mask;
+ // length = flashsize - start position - nvram size
+ len=size-spot;
+ len=len-bcm947xx_parts[3].size;
+
+
+ bcm947xx_parts[4].offset = spot;
+ bcm947xx_parts[4].size = len;
+
+
+
+
/* Size pmon */
bcm947xx_parts[0].size = bcm947xx_parts[1].offset - bcm947xx_parts[0].offset;
+ //int x;
+ //for(x=0; x<5; x++) {
+ // printk(KERN_NOTICE
+ // "Partition %d mask_flags %08x\n",
+ // x,bcm947xx_parts[x].mask_flags);
+ //}
+
+
return bcm947xx_parts;
}
diff -Nurb src/linux/linux.orig/drivers/mtd/maps/bcm947xx-flash.c src/linux/linux/drivers/mtd/maps/bcm947xx-flash.c
--- src/linux/linux.orig/drivers/mtd/maps/bcm947xx-flash.c 2003-11-08 04:35:52.000000000 -0500
+++ src/linux/linux/drivers/mtd/maps/bcm947xx-flash.c 2004-05-25 21:12:24.000000000 -0400
@@ -82,7 +82,21 @@
void bcm947xx_map_copy_from(struct map_info *map, void *to, unsigned long from, ssize_t len)
{
+ //memcpy_fromio(to, map->map_priv_1 + from, len);
+ if (len==1) {
memcpy_fromio(to, map->map_priv_1 + from, len);
+ } else {
+ int i;
+ u16 *dest = (u16 *) to;
+ u16 *src = (u16 *) (map->map_priv_1 + from);
+
+ for (i = 0; i < (len / 2); i++) {
+ dest[i] = src[i];
+ }
+
+ if (len & 1)
+ *((u8 *)dest+len-1) = src[i] & 0xff;
+ }
}
void bcm947xx_map_write8(struct map_info *map, __u8 d, unsigned long adr)
diff -Nurb src/linux/linux.orig/drivers/net/Makefile src/linux/linux/drivers/net/Makefile
--- src/linux/linux.orig/drivers/net/Makefile 2004-02-12 21:35:15.000000000 -0500
+++ src/linux/linux/drivers/net/Makefile 2004-05-25 21:12:24.000000000 -0400
@@ -25,7 +25,7 @@
list-multi := rcpci.o
rcpci-objs := rcpci45.o rclanmtl.o
-subdir-m += mac
+# subdir-m += mac
subdir-m += diag
ifeq ($(CONFIG_HW_QOS),y)
diff -Nurb src/linux/linux.orig/fs/Config.in src/linux/linux/fs/Config.in
--- src/linux/linux.orig/fs/Config.in 2003-07-04 04:12:05.000000000 -0400
+++ src/linux/linux/fs/Config.in 2004-05-25 21:13:03.000000000 -0400
@@ -47,6 +47,7 @@
int 'JFFS2 debugging verbosity (0 = quiet, 2 = noisy)' CONFIG_JFFS2_FS_DEBUG 0
fi
tristate 'Compressed ROM file system support' CONFIG_CRAMFS
+tristate 'Squashed file system support' CONFIG_SQUASHFS
bool 'Virtual memory file system support (former shm fs)' CONFIG_TMPFS
define_bool CONFIG_RAMFS y
diff -Nurb src/linux/linux.orig/fs/Makefile src/linux/linux/fs/Makefile
--- src/linux/linux.orig/fs/Makefile 2003-07-04 04:12:05.000000000 -0400
+++ src/linux/linux/fs/Makefile 2004-05-25 21:13:03.000000000 -0400
@@ -68,6 +68,7 @@
subdir-$(CONFIG_SUN_OPENPROMFS) += openpromfs
subdir-$(CONFIG_BEFS_FS) += befs
subdir-$(CONFIG_JFS_FS) += jfs
+subdir-$(CONFIG_SQUASHFS) += squashfs
obj-$(CONFIG_BINFMT_AOUT) += binfmt_aout.o
diff -Nurb src/linux/linux.orig/fs/squashfs/Makefile src/linux/linux/fs/squashfs/Makefile
--- src/linux/linux.orig/fs/squashfs/Makefile 1969-12-31 19:00:00.000000000 -0500
+++ src/linux/linux/fs/squashfs/Makefile 2004-05-25 21:13:03.000000000 -0400
@@ -0,0 +1,11 @@
+#
+# Makefile for the linux squashfs routines.
+#
+
+O_TARGET := squashfs.o
+
+obj-y := inode.o
+
+obj-m := $(O_TARGET)
+
+include $(TOPDIR)/Rules.make
diff -Nurb src/linux/linux.orig/fs/squashfs/inode.c src/linux/linux/fs/squashfs/inode.c
--- src/linux/linux.orig/fs/squashfs/inode.c 1969-12-31 19:00:00.000000000 -0500
+++ src/linux/linux/fs/squashfs/inode.c 2004-05-25 21:13:03.000000000 -0400
@@ -0,0 +1,1515 @@
+/*
+ * Squashfs - a compressed read only filesystem for Linux
+ *
+ * Copyright (c) 2002, 2003, 2004 Phillip Lougher <plougher@users.sourceforge.net>
+ *
+ * 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,
+ * 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, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ * Squashfs - a compressed read only filesystem for Linux
+ *
+ * inode.c
+ */
+
+#define SQUASHFS_1_0_COMPATIBILITY
+
+#include <linux/types.h>
+#include <linux/squashfs_fs.h>
+#include <linux/module.h>
+#include <linux/errno.h>
+#include <linux/slab.h>
+#include <linux/fs.h>
+#include <linux/locks.h>
+#include <linux/init.h>
+#include <linux/dcache.h>
+#include <asm/uaccess.h>
+#include <linux/wait.h>
+#include <asm/semaphore.h>
+#include <linux/zlib.h>
+#include <linux/blkdev.h>
+#include <linux/vmalloc.h>
+
+#ifdef SQUASHFS_TRACE
+#define TRACE(s, args...) printk(KERN_NOTICE "SQUASHFS: "s, ## args)
+#else
+#define TRACE(s, args...) {}
+#endif
+
+#define ERROR(s, args...) printk(KERN_ERR "SQUASHFS error: "s, ## args)
+
+#define SERROR(s, args...) if(!silent) printk(KERN_ERR "SQUASHFS error: "s, ## args)
+#define WARNING(s, args...) printk(KERN_WARNING "SQUASHFS: "s, ## args)
+
+static struct super_block *squashfs_read_super(struct super_block *, void *, int);
+static void squashfs_put_super(struct super_block *);
+static int squashfs_statfs(struct super_block *, struct statfs *);
+static int squashfs_symlink_readpage(struct file *file, struct page *page);
+static int squashfs_readpage(struct file *file, struct page *page);
+static int squashfs_readpage4K(struct file *file, struct page *page);
+static int squashfs_readdir(struct file *, void *, filldir_t);
+static struct dentry *squashfs_lookup(struct inode *, struct dentry *);
+static unsigned int read_data(struct super_block *s, char *buffer,
+ unsigned int index, unsigned int length, int, unsigned int *next_index);
+static int squashfs_get_cached_block(struct super_block *s, char *buffer,
+ unsigned int block, unsigned int offset, int length,
+ unsigned int *next_block, unsigned int *next_offset);
+static struct inode *squashfs_iget(struct super_block *s, squashfs_inode inode);
+static unsigned int read_blocklist(struct inode *inode, int index, int readahead_blks,
+ char *block_list, char **block_p, unsigned int *bsize);
+static void squashfs_put_super(struct super_block *s);
+
+#ifdef SQUASHFS_1_0_COMPATIBILITY
+static int squashfs_readpage_lessthan4K(struct file *file, struct page *page);
+static struct inode *squashfs_iget_1(struct super_block *s, squashfs_inode inode);
+static unsigned int read_blocklist_1(struct inode *inode, int index, int readahead_blks,
+ char *block_list, char **block_p, unsigned int *bsize);
+#endif
+
+DECLARE_MUTEX(read_data_mutex);
+
+static z_stream stream;
+
+static DECLARE_FSTYPE_DEV(squashfs_fs_type, "squashfs", squashfs_read_super);
+
+static unsigned char squashfs_filetype_table[] = {
+ DT_UNKNOWN, DT_DIR, DT_REG, DT_LNK, DT_BLK, DT_CHR, DT_FIFO, DT_SOCK
+};
+
+static struct super_operations squashfs_ops = {
+ statfs: squashfs_statfs,
+ put_super: squashfs_put_super,
+};
+
+static struct address_space_operations squashfs_symlink_aops = {
+ readpage: squashfs_symlink_readpage
+};
+
+static struct address_space_operations squashfs_aops = {
+ readpage: squashfs_readpage
+};
+
+static struct address_space_operations squashfs_aops_4K = {
+ readpage: squashfs_readpage4K
+};
+
+#ifdef SQUASHFS_1_0_COMPATIBILITY
+static struct address_space_operations squashfs_aops_lessthan4K = {
+ readpage: squashfs_readpage_lessthan4K
+};
+#endif
+
+static struct file_operations squashfs_dir_ops = {
+ read: generic_read_dir,
+ readdir: squashfs_readdir
+};
+
+static struct inode_operations squashfs_dir_inode_ops = {
+ lookup: squashfs_lookup
+};
+
+
+static unsigned int read_data(struct super_block *s, char *buffer,
+ unsigned int index, unsigned int length, int datablock, unsigned int *next_index)
+{
+ squashfs_sb_info *msBlk = &s->u.squashfs_sb;
+ struct buffer_head *bh[((SQUASHFS_FILE_MAX_SIZE - 1) >> msBlk->devblksize_log2) + 2];
+ unsigned int offset = index & ((1 << msBlk->devblksize_log2) - 1);
+ unsigned int cur_index = index >> msBlk->devblksize_log2;
+ int bytes, avail_bytes, b, k;
+ char *c_buffer;
+ unsigned int compressed;
+ unsigned int c_byte = length;
+
+ if(c_byte) {
+ bytes = msBlk->devblksize - offset;
+ if(datablock) {
+ c_buffer = (compressed = SQUASHFS_COMPRESSED_BLOCK(c_byte)) ? msBlk->read_data : buffer;
+ c_byte = SQUASHFS_COMPRESSED_SIZE_BLOCK(c_byte);
+ } else {
+ c_buffer = (compressed = SQUASHFS_COMPRESSED(c_byte)) ? msBlk->read_data : buffer;
+ c_byte = SQUASHFS_COMPRESSED_SIZE(c_byte);
+ }
+
+ TRACE("Block @ 0x%x, %scompressed size %d\n", index, compressed ? "" : "un", (unsigned int) c_byte);
+
+ if(!(bh[0] = sb_getblk(s, cur_index)))
+ goto block_release;
+ for(b = 1; bytes < c_byte; b++) {
+ if(!(bh[b] = sb_getblk(s, ++cur_index)))
+ goto block_release;
+ bytes += msBlk->devblksize;
+ }
+ ll_rw_block(READ, b, bh);
+ } else {
+ unsigned short temp;
+ if(!(bh[0] = sb_bread(s, cur_index)))
+ goto read_failure;
+
+ if(msBlk->devblksize - offset == 1) {
+ if(msBlk->swap)
+ ((unsigned char *) &temp)[1] = *((unsigned char *) (bh[0]->b_data + offset));
+ else
+ ((unsigned char *) &temp)[0] = *((unsigned char *) (bh[0]->b_data + offset));
+ brelse(bh[0]);
+ if(!(bh[0] = sb_bread(s, ++cur_index)))
+ goto read_failure;
+ if(msBlk->swap)
+ ((unsigned char *) &temp)[0] = *((unsigned char *) bh[0]->b_data);
+ else
+ ((unsigned char *) &temp)[1] = *((unsigned char *) bh[0]->b_data);
+ c_byte = temp;
+ offset = 1;
+ }
+ else {
+ if(msBlk->swap) {
+ unsigned short temp;
+ ((unsigned char *) &temp)[1] = *((unsigned char *) (bh[0]->b_data + offset));
+ ((unsigned char *) &temp)[0] = *((unsigned char *) (bh[0]->b_data + offset + 1));
+ c_byte = temp;
+ } else
+ c_byte = *((unsigned short *) (bh[0]->b_data + offset));
+ offset += 2;
+ }
+ if(SQUASHFS_CHECK_DATA(msBlk->sBlk.flags)) {
+ if(offset == msBlk->devblksize) {
+ brelse(bh[0]);
+ if(!(bh[0] = sb_bread(s, ++cur_index)))
+ goto read_failure;
+ offset = 0;
+ }
+ if(*((unsigned char *) (bh[0]->b_data + offset)) != SQUASHFS_MARKER_BYTE) {
+ ERROR("Metadata block marker corrupt @ %x\n", index);
+ brelse(bh[0]);
+ return 0;
+ }
+ offset ++;
+ }
+
+ bytes = msBlk->devblksize - offset;
+ if(datablock) {
+ c_buffer = (compressed = SQUASHFS_COMPRESSED_BLOCK(c_byte)) ? msBlk->read_data : buffer;
+ c_byte = SQUASHFS_COMPRESSED_SIZE_BLOCK(c_byte);
+ } else {
+ c_buffer = (compressed = SQUASHFS_COMPRESSED(c_byte)) ? msBlk->read_data : buffer;
+ c_byte = SQUASHFS_COMPRESSED_SIZE(c_byte);
+ }
+
+ TRACE("Block @ 0x%x, %scompressed size %d\n", index, compressed ? "" : "un", (unsigned int) c_byte);
+
+ for(b = 1; bytes < c_byte; b++) {
+ if(!(bh[b] = sb_getblk(s, ++cur_index)))
+ goto block_release;
+ bytes += msBlk->devblksize;
+ }
+ ll_rw_block(READ, b - 1, bh + 1);
+ }
+
+ if(compressed)
+ down(&read_data_mutex);
+
+ for(bytes = 0, k = 0; k < b; k++) {
+ avail_bytes = (c_byte - bytes) > (msBlk->devblksize - offset) ? msBlk->devblksize - offset : c_byte - bytes;
+ wait_on_buffer(bh[k]);
+ memcpy(c_buffer + bytes, bh[k]->b_data + offset, avail_bytes);
+ bytes += avail_bytes;
+ offset = 0;
+ brelse(bh[k]);
+ }
+
+ /*
+ * uncompress block
+ */
+ if(compressed) {
+ int zlib_err;
+
+ stream.next_in = c_buffer;
+ stream.avail_in = c_byte;
+ stream.next_out = buffer;
+ stream.avail_out = msBlk->read_size;
+ if(((zlib_err = zlib_inflateInit(&stream)) != Z_OK) ||
+ ((zlib_err = zlib_inflate(&stream, Z_FINISH)) != Z_STREAM_END) ||
+ ((zlib_err = zlib_inflateEnd(&stream)) != Z_OK)) {
+ ERROR("zlib_fs returned unexpected result 0x%x\n", zlib_err);
+ bytes = 0;
+ } else
+ bytes = stream.total_out;
+ up(&read_data_mutex);
+ }
+
+ if(next_index)
+ *next_index = index + c_byte + (length ? 0 : (SQUASHFS_CHECK_DATA(msBlk->sBlk.flags) ? 3 : 2));
+
+ return bytes;
+
+block_release:
+ while(--b >= 0) brelse(bh[b]);
+
+read_failure:
+ ERROR("sb_bread failed reading block 0x%x\n", cur_index);
+ return 0;
+}
+
+
+static int squashfs_get_cached_block(struct super_block *s, char *buffer,
+ unsigned int block, unsigned int offset, int length,
+ unsigned int *next_block, unsigned int *next_offset)
+{
+ squashfs_sb_info *msBlk = &s->u.squashfs_sb;
+ int n, i, bytes, return_length = length;
+ unsigned int next_index;
+
+ TRACE("Entered squashfs_get_cached_block [%x:%x]\n", block, offset);
+
+ for(;;) {
+ for(i = 0; i < SQUASHFS_CACHED_BLKS; i++)
+ if(msBlk->block_cache[i].block == block)
+ break;
+
+ down(&msBlk->block_cache_mutex);
+ if(i == SQUASHFS_CACHED_BLKS) {
+ /* read inode header block */
+ for(i = msBlk->next_cache, n = SQUASHFS_CACHED_BLKS; n ; n --, i = (i + 1) % SQUASHFS_CACHED_BLKS)
+ if(msBlk->block_cache[i].block != SQUASHFS_USED_BLK)
+ break;
+ if(n == 0) {
+ up(&msBlk->block_cache_mutex);
+ sleep_on(&msBlk->waitq);
+ continue;
+ }
+ msBlk->next_cache = (i + 1) % SQUASHFS_CACHED_BLKS;
+
+ if(msBlk->block_cache[i].block == SQUASHFS_INVALID_BLK) {
+ if(!(msBlk->block_cache[i].data = (unsigned char *)
+ kmalloc(SQUASHFS_METADATA_SIZE, GFP_KERNEL))) {
+ ERROR("Failed to allocate cache block\n");
+ up(&msBlk->block_cache_mutex);
+ return 0;
+ }
+ }
+
+ msBlk->block_cache[i].block = SQUASHFS_USED_BLK;
+ up(&msBlk->block_cache_mutex);
+ if(!(msBlk->block_cache[i].length = read_data(s, msBlk->block_cache[i].data, block, 0, 0,
+ &next_index))) {
+ ERROR("Unable to read cache block [%x:%x]\n", block, offset);
+ return 0;
+ }
+ down(&msBlk->block_cache_mutex);
+ wake_up(&msBlk->waitq);
+ msBlk->block_cache[i].block = block;
+ msBlk->block_cache[i].next_index = next_index;
+ TRACE("Read cache block [%x:%x]\n", block, offset);
+ }
+
+ if(msBlk->block_cache[i].block != block) {
+ up(&msBlk->block_cache_mutex);
+ continue;
+ }
+
+ if((bytes = msBlk->block_cache[i].length - offset) >= length) {
+ if(buffer)
+ memcpy(buffer, msBlk->block_cache[i].data + offset, length);
+ if(msBlk->block_cache[i].length - offset == length) {
+ *next_block = msBlk->block_cache[i].next_index;
+ *next_offset = 0;
+ } else {
+ *next_block = block;
+ *next_offset = offset + length;
+ }
+
+ up(&msBlk->block_cache_mutex);
+ return return_length;
+ } else {
+ if(buffer) {
+ memcpy(buffer, msBlk->block_cache[i].data + offset, bytes);
+ buffer += bytes;
+ }
+ block = msBlk->block_cache[i].next_index;
+ up(&msBlk->block_cache_mutex);
+ length -= bytes;
+ offset = 0;
+ }
+ }
+}
+
+
+static int get_fragment_location(struct super_block *s, unsigned int fragment, unsigned int *fragment_start_block, unsigned int *fragment_size)
+{
+ squashfs_sb_info *msBlk = &s->u.squashfs_sb;
+ unsigned int start_block = msBlk->fragment_index[SQUASHFS_FRAGMENT_INDEX(fragment)];
+ int offset = SQUASHFS_FRAGMENT_INDEX_OFFSET(fragment);
+ squashfs_fragment_entry fragment_entry;
+
+ if(msBlk->swap) {
+ squashfs_fragment_entry sfragment_entry;
+
+ if(!squashfs_get_cached_block(s, (char *) &sfragment_entry, start_block, offset,
+ sizeof(sfragment_entry), &start_block, &offset))
+ return 0;
+ SQUASHFS_SWAP_FRAGMENT_ENTRY(&fragment_entry, &sfragment_entry);
+ } else
+ if(!squashfs_get_cached_block(s, (char *) &fragment_entry, start_block, offset,
+ sizeof(fragment_entry), &start_block, &offset))
+ return 0;
+
+ *fragment_start_block = fragment_entry.start_block;
+ *fragment_size = fragment_entry.size;
+
+ return 1;
+}
+
+
+void release_cached_fragment(squashfs_sb_info *msBlk, struct squashfs_fragment_cache *fragment)
+{
+ down(&msBlk->fragment_mutex);
+ fragment->locked --;
+ wake_up(&msBlk->fragment_wait_queue);
+ up(&msBlk->fragment_mutex);
+}
+
+
+struct squashfs_fragment_cache *get_cached_fragment(struct super_block *s, unsigned int start_block, int length)
+{
+ int i, n;
+ squashfs_sb_info *msBlk = &s->u.squashfs_sb;
+
+ for(;;) {
+ down(&msBlk->fragment_mutex);
+ for(i = 0; i < SQUASHFS_CACHED_FRAGMENTS && msBlk->fragment[i].block != start_block; i++);
+ if(i == SQUASHFS_CACHED_FRAGMENTS) {
+ for(i = msBlk->next_fragment, n = SQUASHFS_CACHED_FRAGMENTS;
+ n && msBlk->fragment[i].locked; n--, i = (i + 1) % SQUASHFS_CACHED_FRAGMENTS);
+
+ if(n == 0) {
+ up(&msBlk->fragment_mutex);
+ sleep_on(&msBlk->fragment_wait_queue);
+ continue;
+ }
+ msBlk->next_fragment = (msBlk->next_fragment + 1) % SQUASHFS_CACHED_FRAGMENTS;
+
+ if(msBlk->fragment[i].data == NULL)
+ if(!(msBlk->fragment[i].data = (unsigned char *)
+ kmalloc(SQUASHFS_FILE_MAX_SIZE, GFP_KERNEL))) {
+ ERROR("Failed to allocate fragment cache block\n");
+ up(&msBlk->fragment_mutex);
+ return NULL;
+ }
+
+ msBlk->fragment[i].block = SQUASHFS_INVALID_BLK;
+ msBlk->fragment[i].locked = 1;
+ up(&msBlk->fragment_mutex);
+ if(!(msBlk->fragment[i].length = read_data(s, msBlk->fragment[i].data, start_block, length,
+ 1, NULL))) {
+ ERROR("Unable to read fragment cache block [%x]\n", start_block);
+ msBlk->fragment[i].locked = 0;
+ return NULL;
+ }
+ msBlk->fragment[i].block = start_block;
+ TRACE("New fragment %d, start block %d, locked %d\n", i, msBlk->fragment[i].block, msBlk->fragment[i].locked);
+ return &msBlk->fragment[i];
+ }
+
+ msBlk->fragment[i].locked ++;
+ up(&msBlk->fragment_mutex);
+
+ TRACE("Got fragment %d, start block %d, locked %d\n", i, msBlk->fragment[i].block, msBlk->fragment[i].locked);
+ return &msBlk->fragment[i];
+ }
+}
+
+
+#ifdef SQUASHFS_1_0_COMPATIBILITY
+static struct inode *squashfs_iget_1(struct super_block *s, squashfs_inode inode)
+{
+ struct inode *i = new_inode(s);
+ squashfs_sb_info *msBlk = &s->u.squashfs_sb;
+ squashfs_super_block *sBlk = &msBlk->sBlk;
+ unsigned int block = SQUASHFS_INODE_BLK(inode) + sBlk->inode_table_start;
+ unsigned int offset = SQUASHFS_INODE_OFFSET(inode);
+ unsigned int next_block, next_offset;
+ squashfs_base_inode_header_1 inodeb;
+
+ TRACE("Entered squashfs_iget_1\n");
+
+ if(msBlk->swap) {
+ squashfs_base_inode_header_1 sinodeb;
+
+ if(!squashfs_get_cached_block(s, (char *) &sinodeb, block, offset,
+ sizeof(sinodeb), &next_block, &next_offset))
+ goto failed_read;
+ SQUASHFS_SWAP_BASE_INODE_HEADER_1(&inodeb, &sinodeb, sizeof(sinodeb));
+ } else
+ if(!squashfs_get_cached_block(s, (char *) &inodeb, block, offset,
+ sizeof(inodeb), &next_block, &next_offset))
+ goto failed_read;
+
+ i->i_nlink = 1;
+
+ i->i_mtime = sBlk->mkfs_time;
+ i->i_atime = sBlk->mkfs_time;
+ i->i_ctime = sBlk->mkfs_time;
+
+ if(inodeb.inode_type != SQUASHFS_IPC_TYPE)
+ i->i_uid = msBlk->uid[((inodeb.inode_type - 1) / SQUASHFS_TYPES) * 16 + inodeb.uid];
+ i->i_ino = SQUASHFS_MK_VFS_INODE(block - sBlk->inode_table_start, offset);
+
+ i->i_mode = inodeb.mode;
+
+ switch(inodeb.inode_type == SQUASHFS_IPC_TYPE ? SQUASHFS_IPC_TYPE : (inodeb.inode_type - 1) % SQUASHFS_TYPES + 1) {
+ case SQUASHFS_FILE_TYPE: {
+ squashfs_reg_inode_header_1 inodep;
+
+ if(msBlk->swap) {
+ squashfs_reg_inode_header_1 sinodep;
+
+ if(!squashfs_get_cached_block(s, (char *) &sinodep, block, offset, sizeof(sinodep),
+ &next_block, &next_offset))
+ goto failed_read;
+ SQUASHFS_SWAP_REG_INODE_HEADER_1(&inodep, &sinodep);
+ } else
+ if(!squashfs_get_cached_block(s, (char *) &inodep, block, offset, sizeof(inodep),
+ &next_block, &next_offset))
+ goto failed_read;
+
+ i->i_size = inodep.file_size;
+ i->i_fop = &generic_ro_fops;
+ if(sBlk->block_size > 4096)
+ i->i_data.a_ops = &squashfs_aops;
+ else if(sBlk->block_size == 4096)
+ i->i_data.a_ops = &squashfs_aops_4K;
+ else
+ i->i_data.a_ops = &squashfs_aops_lessthan4K;
+ i->i_mode |= S_IFREG;
+ i->i_mtime = inodep.mtime;
+ i->i_atime = inodep.mtime;
+ i->i_ctime = inodep.mtime;
+ i->i_blocks = ((i->i_size - 1) >> 9) + 1;
+ i->i_blksize = PAGE_CACHE_SIZE;
+ i->u.squashfs_i.fragment_start_block = SQUASHFS_INVALID_BLK;
+ i->u.squashfs_i.fragment_offset = 0;
+ i->u.squashfs_i.start_block = inodep.start_block;
+ i->u.squashfs_i.block_list_start = next_block;
+ i->u.squashfs_i.offset = next_offset;
+ TRACE("File inode %x:%x, start_block %x, block_list_start %x, offset %x\n",
+ SQUASHFS_INODE_BLK(inode), offset, inodep.start_block, next_block, next_offset);
+ break;
+ }
+ case SQUASHFS_DIR_TYPE: {
+ squashfs_dir_inode_header_1 inodep;
+
+ if(msBlk->swap) {
+ squashfs_dir_inode_header_1 sinodep;
+
+ if(!squashfs_get_cached_block(s, (char *) &sinodep, block, offset, sizeof(sinodep),
+ &next_block, &next_offset))
+ goto failed_read;
+ SQUASHFS_SWAP_DIR_INODE_HEADER_1(&inodep, &sinodep);
+ } else
+ if(!squashfs_get_cached_block(s, (char *) &inodep, block, offset, sizeof(inodep),
+ &next_block, &next_offset))
+ goto failed_read;
+
+ i->i_size = inodep.file_size;
+ i->i_op = &squashfs_dir_inode_ops;
+ i->i_fop = &squashfs_dir_ops;
+ i->i_mode |= S_IFDIR;
+ i->i_mtime = inodep.mtime;
+ i->i_atime = inodep.mtime;
+ i->i_ctime = inodep.mtime;
+ i->u.squashfs_i.start_block = inodep.start_block;
+ i->u.squashfs_i.offset = inodep.offset;
+ TRACE("Directory inode %x:%x, start_block %x, offset %x\n", SQUASHFS_INODE_BLK(inode), offset,
+ inodep.start_block, inodep.offset);
+ break;
+ }
+ case SQUASHFS_SYMLINK_TYPE: {
+ squashfs_symlink_inode_header_1 inodep;
+
+ if(msBlk->swap) {
+ squashfs_symlink_inode_header_1 sinodep;
+
+ if(!squashfs_get_cached_block(s, (char *) &sinodep, block, offset, sizeof(sinodep),
+ &next_block, &next_offset))
+ goto failed_read;
+ SQUASHFS_SWAP_SYMLINK_INODE_HEADER_1(&inodep, &sinodep);
+ } else
+ if(!squashfs_get_cached_block(s, (char *) &inodep, block, offset, sizeof(inodep),
+ &next_block, &next_offset))
+ goto failed_read;
+
+ i->i_size = inodep.symlink_size;
+ i->i_op = &page_symlink_inode_operations;
+ i->i_data.a_ops = &squashfs_symlink_aops;
+ i->i_mode |= S_IFLNK;
+ i->u.squashfs_i.start_block = next_block;
+ i->u.squashfs_i.offset = next_offset;
+ TRACE("Symbolic link inode %x:%x, start_block %x, offset %x\n",
+ SQUASHFS_INODE_BLK(inode), offset, next_block, next_offset);
+ break;
+ }
+ case SQUASHFS_BLKDEV_TYPE:
+ case SQUASHFS_CHRDEV_TYPE: {
+ squashfs_dev_inode_header_1 inodep;
+
+ if(msBlk->swap) {
+ squashfs_dev_inode_header_1 sinodep;
+
+ if(!squashfs_get_cached_block(s, (char *) &sinodep, block, offset, sizeof(sinodep),
+ &next_block, &next_offset))
+ goto failed_read;
+ SQUASHFS_SWAP_DEV_INODE_HEADER_1(&inodep, &sinodep);
+ } else
+ if(!squashfs_get_cached_block(s, (char *) &inodep, block, offset, sizeof(inodep),
+ &next_block, &next_offset))
+ goto failed_read;
+
+ i->i_size = 0;
+ i->i_mode |= (inodeb.inode_type == SQUASHFS_CHRDEV_TYPE) ? S_IFCHR : S_IFBLK;
+ init_special_inode(i, i->i_mode, inodep.rdev);
+ TRACE("Device inode %x:%x, rdev %x\n", SQUASHFS_INODE_BLK(inode), offset, inodep.rdev);
+ break;
+ }
+ case SQUASHFS_IPC_TYPE: {
+ squashfs_ipc_inode_header_1 inodep;
+
+ if(msBlk->swap) {
+ squashfs_ipc_inode_header_1 sinodep;
+
+ if(!squashfs_get_cached_block(s, (char *) &sinodep, block, offset, sizeof(sinodep),
+ &next_block, &next_offset))
+ goto failed_read;
+ SQUASHFS_SWAP_IPC_INODE_HEADER_1(&inodep, &sinodep);
+ } else
+ if(!squashfs_get_cached_block(s, (char *) &inodep, block, offset, sizeof(inodep),
+ &next_block, &next_offset))
+ goto failed_read;
+
+ i->i_size = 0;
+ i->i_mode |= (inodep.type == SQUASHFS_FIFO_TYPE) ? S_IFIFO : S_IFSOCK;
+ i->i_uid = msBlk->uid[inodep.offset * 16 + inodeb.uid];
+ init_special_inode(i, i->i_mode, 0);
+ break;
+ }
+ default:
+ ERROR("Unknown inode type %d in squashfs_iget!\n", inodeb.inode_type);
+ goto failed_read1;
+ }
+
+ if(inodeb.guid == SQUASHFS_GUIDS)
+ i->i_gid = i->i_uid;
+ else
+ i->i_gid = msBlk->guid[inodeb.guid];
+
+ return i;
+
+failed_read:
+ ERROR("Unable to read inode [%x:%x]\n", block, offset);
+
+failed_read1:
+ return NULL;
+}
+#endif
+
+
+static struct inode *squashfs_iget(struct super_block *s, squashfs_inode inode)
+{
+ struct inode *i = new_inode(s);
+ squashfs_sb_info *msBlk = &s->u.squashfs_sb;
+ squashfs_super_block *sBlk = &msBlk->sBlk;
+ unsigned int block = SQUASHFS_INODE_BLK(inode) + sBlk->inode_table_start;
+ unsigned int offset = SQUASHFS_INODE_OFFSET(inode);
+ unsigned int next_block, next_offset;
+ squashfs_base_inode_header inodeb;
+
+ TRACE("Entered squashfs_iget\n");
+
+ if(msBlk->swap) {
+ squashfs_base_inode_header sinodeb;
+
+ if(!squashfs_get_cached_block(s, (char *) &sinodeb, block, offset,
+ sizeof(sinodeb), &next_block, &next_offset))
+ goto failed_read;
+ SQUASHFS_SWAP_BASE_INODE_HEADER(&inodeb, &sinodeb, sizeof(sinodeb));
+ } else
+ if(!squashfs_get_cached_block(s, (char *) &inodeb, block, offset,
+ sizeof(inodeb), &next_block, &next_offset))
+ goto failed_read;
+
+ i->i_nlink = 1;
+
+ i->i_mtime = sBlk->mkfs_time;
+ i->i_atime = sBlk->mkfs_time;
+ i->i_ctime = sBlk->mkfs_time;
+
+ if(inodeb.inode_type != SQUASHFS_IPC_TYPE)
+ i->i_uid = msBlk->uid[((inodeb.inode_type - 1) / SQUASHFS_TYPES) * 16 + inodeb.uid];
+ i->i_ino = SQUASHFS_MK_VFS_INODE(block - sBlk->inode_table_start, offset);
+
+ i->i_mode = inodeb.mode;
+
+ switch(inodeb.inode_type) {
+ case SQUASHFS_FILE_TYPE: {
+ squashfs_reg_inode_header inodep;
+
+ if(msBlk->swap) {
+ squashfs_reg_inode_header sinodep;
+
+ if(!squashfs_get_cached_block(s, (char *) &sinodep, block, offset, sizeof(sinodep),
+ &next_block, &next_offset))
+ goto failed_read;
+ SQUASHFS_SWAP_REG_INODE_HEADER(&inodep, &sinodep);
+ } else
+ if(!squashfs_get_cached_block(s, (char *) &inodep, block, offset, sizeof(inodep),
+ &next_block, &next_offset))
+ goto failed_read;
+
+ i->u.squashfs_i.fragment_start_block = SQUASHFS_INVALID_BLK;
+ if(inodep.fragment != SQUASHFS_INVALID_BLK && !get_fragment_location(s, inodep.fragment,
+ &i->u.squashfs_i.fragment_start_block, &i->u.squashfs_i.fragment_size))
+ goto failed_read;
+
+ i->u.squashfs_i.fragment_offset = inodep.offset;
+ i->i_size = inodep.file_size;
+ i->i_fop = &generic_ro_fops;
+ if(sBlk->block_size > 4096)
+ i->i_data.a_ops = &squashfs_aops;
+ else
+ i->i_data.a_ops = &squashfs_aops_4K;
+ i->i_mode |= S_IFREG;
+ i->i_mtime = inodep.mtime;
+ i->i_atime = inodep.mtime;
+ i->i_ctime = inodep.mtime;
+ i->i_blocks = ((i->i_size - 1) >> 9) + 1;
+ i->i_blksize = PAGE_CACHE_SIZE;
+ i->u.squashfs_i.start_block = inodep.start_block;
+ i->u.squashfs_i.block_list_start = next_block;
+ i->u.squashfs_i.offset = next_offset;
+ TRACE("File inode %x:%x, start_block %x, block_list_start %x, offset %x fragment_index %x fragment_offset %x\n",
+ SQUASHFS_INODE_BLK(inode), offset, inodep.start_block, next_block, next_offset, inodep.fragment, inodep.offset);
+ break;
+ }
+ case SQUASHFS_DIR_TYPE: {
+ squashfs_dir_inode_header inodep;
+
+ if(msBlk->swap) {
+ squashfs_dir_inode_header sinodep;
+
+ if(!squashfs_get_cached_block(s, (char *) &sinodep, block, offset, sizeof(sinodep),
+ &next_block, &next_offset))
+ goto failed_read;
+ SQUASHFS_SWAP_DIR_INODE_HEADER(&inodep, &sinodep);
+ } else
+ if(!squashfs_get_cached_block(s, (char *) &inodep, block, offset, sizeof(inodep),
+ &next_block, &next_offset))
+ goto failed_read;
+
+ i->i_size = inodep.file_size;
+ i->i_op = &squashfs_dir_inode_ops;
+ i->i_fop = &squashfs_dir_ops;
+ i->i_mode |= S_IFDIR;
+ i->i_mtime = inodep.mtime;
+ i->i_atime = inodep.mtime;
+ i->i_ctime = inodep.mtime;
+ i->u.squashfs_i.start_block = inodep.start_block;
+ i->u.squashfs_i.offset = inodep.offset;
+ TRACE("Directory inode %x:%x, start_block %x, offset %x\n", SQUASHFS_INODE_BLK(inode), offset,
+ inodep.start_block, inodep.offset);
+ break;
+ }
+ case SQUASHFS_SYMLINK_TYPE: {
+ squashfs_symlink_inode_header inodep;
+
+ if(msBlk->swap) {
+ squashfs_symlink_inode_header sinodep;
+
+ if(!squashfs_get_cached_block(s, (char *) &sinodep, block, offset, sizeof(sinodep),
+ &next_block, &next_offset))
+ goto failed_read;
+ SQUASHFS_SWAP_SYMLINK_INODE_HEADER(&inodep, &sinodep);
+ } else
+ if(!squashfs_get_cached_block(s, (char *) &inodep, block, offset, sizeof(inodep),
+ &next_block, &next_offset))
+ goto failed_read;
+
+ i->i_size = inodep.symlink_size;
+ i->i_op = &page_symlink_inode_operations;
+ i->i_data.a_ops = &squashfs_symlink_aops;
+ i->i_mode |= S_IFLNK;
+ i->u.squashfs_i.start_block = next_block;
+ i->u.squashfs_i.offset = next_offset;
+ TRACE("Symbolic link inode %x:%x, start_block %x, offset %x\n",
+ SQUASHFS_INODE_BLK(inode), offset, next_block, next_offset);
+ break;
+ }
+ case SQUASHFS_BLKDEV_TYPE:
+ case SQUASHFS_CHRDEV_TYPE: {
+ squashfs_dev_inode_header inodep;
+
+ if(msBlk->swap) {
+ squashfs_dev_inode_header sinodep;
+
+ if(!squashfs_get_cached_block(s, (char *) &sinodep, block, offset, sizeof(sinodep),
+ &next_block, &next_offset))
+ goto failed_read;
+ SQUASHFS_SWAP_DEV_INODE_HEADER(&inodep, &sinodep);
+ } else
+ if(!squashfs_get_cached_block(s, (char *) &inodep, block, offset, sizeof(inodep),
+ &next_block, &next_offset))
+ goto failed_read;
+
+ i->i_size = 0;
+ i->i_mode |= (inodeb.inode_type == SQUASHFS_CHRDEV_TYPE) ? S_IFCHR : S_IFBLK;
+ init_special_inode(i, i->i_mode, inodep.rdev);
+ TRACE("Device inode %x:%x, rdev %x\n", SQUASHFS_INODE_BLK(inode), offset, inodep.rdev);
+ break;
+ }
+ case SQUASHFS_FIFO_TYPE:
+ case SQUASHFS_SOCKET_TYPE: {
+ i->i_size = 0;
+ i->i_mode |= (inodeb.inode_type == SQUASHFS_FIFO_TYPE) ? S_IFIFO : S_IFSOCK;
+ init_special_inode(i, i->i_mode, 0);
+ break;
+ }
+ default:
+ ERROR("Unknown inode type %d in squashfs_iget!\n", inodeb.inode_type);
+ goto failed_read1;
+ }
+
+ if(inodeb.guid == SQUASHFS_GUIDS)
+ i->i_gid = i->i_uid;
+ else
+ i->i_gid = msBlk->guid[inodeb.guid];
+
+ return i;
+
+failed_read:
+ ERROR("Unable to read inode [%x:%x]\n", block, offset);
+
+failed_read1:
+ return NULL;
+}
+
+
+static struct super_block *squashfs_read_super(struct super_block *s,
+ void *data, int silent)
+{
+ kdev_t dev = s->s_dev;
+ squashfs_sb_info *msBlk = &s->u.squashfs_sb;
+ squashfs_super_block *sBlk = &msBlk->sBlk;
+ int i;
+
+ TRACE("Entered squashfs_read_superblock\n");
+
+ msBlk->devblksize = get_hardsect_size(dev);
+ if(msBlk->devblksize < BLOCK_SIZE)
+ msBlk->devblksize = BLOCK_SIZE;
+ msBlk->devblksize_log2 = ffz(~msBlk->devblksize);
+ set_blocksize(dev, msBlk->devblksize);
+ s->s_blocksize = msBlk->devblksize;
+ s->s_blocksize_bits = msBlk->devblksize_log2;
+
+ init_MUTEX(&msBlk->read_page_mutex);
+ init_MUTEX(&msBlk->block_cache_mutex);
+ init_MUTEX(&msBlk->fragment_mutex);
+
+ init_waitqueue_head(&msBlk->waitq);
+ init_waitqueue_head(&msBlk->fragment_wait_queue);
+
+ if(!read_data(s, (char *) sBlk, SQUASHFS_START, sizeof(squashfs_super_block) | SQUASHFS_COMPRESSED_BIT, 0, NULL)) {
+ SERROR("unable to read superblock\n");
+ goto failed_mount;
+ }
+
+ /* Check it is a SQUASHFS superblock */
+ msBlk->swap = 0;
+ if((s->s_magic = sBlk->s_magic) != SQUASHFS_MAGIC) {
+ if(sBlk->s_magic == SQUASHFS_MAGIC_SWAP) {
+ squashfs_super_block sblk;
+ WARNING("Mounting a different endian SQUASHFS filesystem on %s\n", bdevname(dev));
+ SQUASHFS_SWAP_SUPER_BLOCK(&sblk, sBlk);
+ memcpy(sBlk, &sblk, sizeof(squashfs_super_block));
+ msBlk->swap = 1;
+ } else {
+ SERROR("Can't find a SQUASHFS superblock on %s\n", bdevname(dev));
+ goto failed_mount;
+ }
+ }
+
+ /* Check the MAJOR & MINOR versions */
+#ifdef SQUASHFS_1_0_COMPATIBILITY
+ if((sBlk->s_major != 1) && (sBlk->s_major != 2 || sBlk->s_minor > SQUASHFS_MINOR)) {
+ SERROR("Major/Minor mismatch, filesystem is (%d:%d), I support (1 : x) or (2 : <= %d)\n",
+ sBlk->s_major, sBlk->s_minor, SQUASHFS_MINOR);
+ goto failed_mount;
+ }
+ if(sBlk->s_major == 1)
+ sBlk->block_size = sBlk->block_size_1;
+#else
+ if(sBlk->s_major != SQUASHFS_MAJOR || sBlk->s_minor > SQUASHFS_MINOR) {
+ SERROR("Major/Minor mismatch, filesystem is (%d:%d), I support (%d: <= %d)\n",
+ sBlk->s_major, sBlk->s_minor, SQUASHFS_MAJOR, SQUASHFS_MINOR);
+ goto failed_mount;
+ }
+#endif
+
+ TRACE("Found valid superblock on %s\n", bdevname(dev));
+ TRACE("Inodes are %scompressed\n", SQUASHFS_UNCOMPRESSED_INODES(sBlk->flags) ? "un" : "");
+ TRACE("Data is %scompressed\n", SQUASHFS_UNCOMPRESSED_DATA(sBlk->flags) ? "un" : "");
+ TRACE("Check data is %s present in the filesystem\n", SQUASHFS_CHECK_DATA(sBlk->flags) ? "" : "not");
+ TRACE("Filesystem size %d bytes\n", sBlk->bytes_used);
+ TRACE("Block size %d\n", sBlk->block_size);
+ TRACE("Number of inodes %d\n", sBlk->inodes);
+ if(sBlk->s_major > 1)
+ TRACE("Number of fragments %d\n", sBlk->fragments);
+ TRACE("Number of uids %d\n", sBlk->no_uids);
+ TRACE("Number of gids %d\n", sBlk->no_guids);
+ TRACE("sBlk->inode_table_start %x\n", sBlk->inode_table_start);
+ TRACE("sBlk->directory_table_start %x\n", sBlk->directory_table_start);
+ if(sBlk->s_major > 1)
+ TRACE("sBlk->fragment_table_start %x\n", sBlk->fragment_table_start);
+ TRACE("sBlk->uid_start %x\n", sBlk->uid_start);
+
+ s->s_flags |= MS_RDONLY;
+ s->s_op = &squashfs_ops;
+
+ /* Init inode_table block pointer array */
+ if(!(msBlk->block_cache = (squashfs_cache *) kmalloc(sizeof(squashfs_cache) * SQUASHFS_CACHED_BLKS, GFP_KERNEL))) {
+ ERROR("Failed to allocate block cache\n");
+ goto failed_mount;
+ }
+
+ for(i = 0; i < SQUASHFS_CACHED_BLKS; i++)
+ msBlk->block_cache[i].block = SQUASHFS_INVALID_BLK;
+
+ msBlk->next_cache = 0;
+
+ /* Allocate read_data block */
+ msBlk->read_size = (sBlk->block_size < SQUASHFS_METADATA_SIZE) ? SQUASHFS_METADATA_SIZE : sBlk->block_size;
+ if(!(msBlk->read_data = (char *) kmalloc(msBlk->read_size, GFP_KERNEL))) {
+ ERROR("Failed to allocate read_data block\n");
+ goto failed_mount1;
+ }
+
+ /* Allocate read_page block */
+ if(sBlk->block_size > PAGE_CACHE_SIZE &&
+ !(msBlk->read_page = (char *) kmalloc(sBlk->block_size, GFP_KERNEL))) {
+ ERROR("Failed to allocate read_page block\n");
+ goto failed_mount2;
+ }
+
+ /* Allocate uid and gid tables */
+ if(!(msBlk->uid = (squashfs_uid *) kmalloc((sBlk->no_uids +
+ sBlk->no_guids) * sizeof(squashfs_uid), GFP_KERNEL))) {
+ ERROR("Failed to allocate uid/gid table\n");
+ goto failed_mount3;
+ }
+ msBlk->guid = msBlk->uid + sBlk->no_uids;
+
+ if(msBlk->swap) {
+ squashfs_uid suid[sBlk->no_uids + sBlk->no_guids];
+
+ if(!read_data(s, (char *) &suid, sBlk->uid_start, ((sBlk->no_uids + sBlk->no_guids) *
+ sizeof(squashfs_uid)) | SQUASHFS_COMPRESSED_BIT, 0, NULL)) {
+ SERROR("unable to read uid/gid table\n");
+ goto failed_mount4;
+ }
+ SQUASHFS_SWAP_DATA(msBlk->uid, suid, (sBlk->no_uids + sBlk->no_guids), (sizeof(squashfs_uid) * 8));
+ } else
+ if(!read_data(s, (char *) msBlk->uid, sBlk->uid_start, ((sBlk->no_uids + sBlk->no_guids) *
+ sizeof(squashfs_uid)) | SQUASHFS_COMPRESSED_BIT, 0, NULL)) {
+ SERROR("unable to read uid/gid table\n");
+ goto failed_mount4;
+ }
+
+
+#ifdef SQUASHFS_1_0_COMPATIBILITY
+ if(sBlk->s_major == 1) {
+ msBlk->iget = squashfs_iget_1;
+ msBlk->read_blocklist = read_blocklist_1;
+ msBlk->fragment = (struct squashfs_fragment_cache *) msBlk->fragment_index = NULL;
+ goto allocate_root;
+ }
+#endif
+ msBlk->iget = squashfs_iget;
+ msBlk->read_blocklist = read_blocklist;
+
+ if(!(msBlk->fragment = (struct squashfs_fragment_cache *) kmalloc(sizeof(struct squashfs_fragment_cache) * SQUASHFS_CACHED_FRAGMENTS, GFP_KERNEL))) {
+ ERROR("Failed to allocate fragment block cache\n");
+ goto failed_mount4;
+ }
+
+ for(i = 0; i < SQUASHFS_CACHED_FRAGMENTS; i++) {
+ msBlk->fragment[i].locked = 0;
+ msBlk->fragment[i].block = SQUASHFS_INVALID_BLK;
+ msBlk->fragment[i].data = NULL;
+ }
+
+ msBlk->next_fragment = 0;
+
+ /* Allocate fragment index table */
+ if(!(msBlk->fragment_index = (squashfs_fragment_index *) kmalloc(SQUASHFS_FRAGMENT_INDEX_BYTES(sBlk->fragments), GFP_KERNEL))) {
+ ERROR("Failed to allocate uid/gid table\n");
+ goto failed_mount5;
+ }
+
+ if(SQUASHFS_FRAGMENT_INDEX_BYTES(sBlk->fragments) &&
+ !read_data(s, (char *) msBlk->fragment_index, sBlk->fragment_table_start,
+ SQUASHFS_FRAGMENT_INDEX_BYTES(sBlk->fragments) | SQUASHFS_COMPRESSED_BIT, 0, NULL)) {
+ SERROR("unable to read fragment index table\n");
+ goto failed_mount6;
+ }
+
+ if(msBlk->swap) {
+ int i;
+ squashfs_fragment_index fragment;
+
+ for(i = 0; i < SQUASHFS_FRAGMENT_INDEXES(sBlk->fragments); i++) {
+ SQUASHFS_SWAP_FRAGMENT_INDEXES((&fragment), &msBlk->fragment_index[i], 1);
+ msBlk->fragment_index[i] = fragment;
+ }
+ }
+
+#ifdef SQUASHFS_1_0_COMPATIBILITY
+allocate_root:
+#endif
+ if(!(s->s_root = d_alloc_root((msBlk->iget)(s, sBlk->root_inode)))) {
+ ERROR("Root inode create failed\n");
+ goto failed_mount5;
+ }
+
+ TRACE("Leaving squashfs_read_super\n");
+ return s;
+
+failed_mount6:
+ kfree(msBlk->fragment_index);
+failed_mount5:
+ kfree(msBlk->fragment);
+failed_mount4:
+ kfree(msBlk->uid);
+failed_mount3:
+ kfree(msBlk->read_page);
+failed_mount2:
+ kfree(msBlk->read_data);
+failed_mount1:
+ kfree(msBlk->block_cache);
+failed_mount:
+ return NULL;
+}
+
+
+static int squashfs_statfs(struct super_block *s, struct statfs *buf)
+{
+ squashfs_super_block *sBlk = &s->u.squashfs_sb.sBlk;
+
+ TRACE("Entered squashfs_statfs\n");
+ buf->f_type = SQUASHFS_MAGIC;
+ buf->f_bsize = sBlk->block_size;
+ buf->f_blocks = ((sBlk->bytes_used - 1) >> sBlk->block_log) + 1;
+ buf->f_bfree = buf->f_bavail = 0;
+ buf->f_files = sBlk->inodes;
+ buf->f_ffree = 0;
+ buf->f_namelen = SQUASHFS_NAME_LEN;
+ return 0;
+}
+
+
+static int squashfs_symlink_readpage(struct file *file, struct page *page)
+{
+ struct inode *inode = page->mapping->host;
+ int index = page->index << PAGE_CACHE_SHIFT, length, bytes;
+ int block = inode->u.squashfs_i.start_block;
+ int offset = inode->u.squashfs_i.offset;
+ void *pageaddr = kmap(page);
+
+ TRACE("Entered squashfs_symlink_readpage, page index %x, start block %x, offset %x\n",
+ (unsigned int) page->index, inode->u.squashfs_i.start_block, inode->u.squashfs_i.offset);
+
+ for(length = 0; length < index; length += bytes) {
+ if(!(bytes = squashfs_get_cached_block(inode->i_sb, NULL, block, offset,
+ PAGE_CACHE_SIZE, &block, &offset))) {
+ ERROR("Unable to read symbolic link [%x:%x]\n", block, offset);
+ goto skip_read;
+ }
+ }
+
+ if(length != index) {
+ ERROR("(squashfs_symlink_readpage) length != index\n");
+ bytes = 0;
+ goto skip_read;
+ }
+
+ bytes = (inode->i_size - length) > PAGE_CACHE_SIZE ? PAGE_CACHE_SIZE : inode->i_size - length;
+ if(!(bytes = squashfs_get_cached_block(inode->i_sb, pageaddr, block, offset, bytes, &block, &offset)))
+ ERROR("Unable to read symbolic link [%x:%x]\n", block, offset);
+
+skip_read:
+ memset(pageaddr + bytes, 0, PAGE_CACHE_SIZE - bytes);
+ kunmap(page);
+ flush_dcache_page(page);
+ SetPageUptodate(page);
+ UnlockPage(page);
+
+ return 0;
+}
+
+
+#define SIZE 256
+
+#ifdef SQUASHFS_1_0_COMPATIBILITY
+static unsigned int read_blocklist_1(struct inode *inode, int index, int readahead_blks,
+ char *block_list, char **block_p, unsigned int *bsize)
+{
+ squashfs_sb_info *msBlk = &inode->i_sb->u.squashfs_sb;
+ unsigned short *block_listp;
+ int i = 0;
+ int block_ptr = inode->u.squashfs_i.block_list_start;
+ int offset = inode->u.squashfs_i.offset;
+ int block = inode->u.squashfs_i.start_block;
+
+ for(;;) {
+ int blocks = (index + readahead_blks - i);
+ if(blocks > (SIZE >> 1)) {
+ if((index - i) <= (SIZE >> 1))
+ blocks = index - i;
+ else
+ blocks = SIZE >> 1;
+ }
+
+ if(msBlk->swap) {
+ unsigned char sblock_list[SIZE];
+ if(!squashfs_get_cached_block(inode->i_sb, (char *) sblock_list, block_ptr, offset, blocks << 1, &block_ptr, &offset)) {
+ ERROR("Unable to read block list [%d:%x]\n", block_ptr, offset);
+ return 0;
+ }
+ SQUASHFS_SWAP_SHORTS(((unsigned short *)block_list), ((unsigned short *)sblock_list), blocks);
+ } else
+ if(!squashfs_get_cached_block(inode->i_sb, (char *) block_list, block_ptr, offset, blocks << 1, &block_ptr, &offset)) {
+ ERROR("Unable to read block list [%d:%x]\n", block_ptr, offset);
+ return 0;
+ }
+ for(block_listp = (unsigned short *) block_list; i < index && blocks; i ++, block_listp ++, blocks --)
+ block += SQUASHFS_COMPRESSED_SIZE(*block_listp);
+ if(blocks >= readahead_blks)
+ break;
+ }
+
+ if(bsize)
+ *bsize = SQUASHFS_COMPRESSED_SIZE(*block_listp) | (!SQUASHFS_COMPRESSED(*block_listp) ? SQUASHFS_COMPRESSED_BIT_BLOCK : 0);
+ else
+ (unsigned short *) *block_p = block_listp;
+ return block;
+}
+#endif
+
+
+
+static unsigned int read_blocklist(struct inode *inode, int index, int readahead_blks,
+ char *block_list, char **block_p, unsigned int *bsize)
+{
+ squashfs_sb_info *msBlk = &inode->i_sb->u.squashfs_sb;
+ unsigned int *block_listp;
+ int i = 0;
+ int block_ptr = inode->u.squashfs_i.block_list_start;
+ int offset = inode->u.squashfs_i.offset;
+ int block = inode->u.squashfs_i.start_block;
+
+ for(;;) {
+ int blocks = (index + readahead_blks - i);
+ if(blocks > (SIZE >> 2)) {
+ if((index - i) <= (SIZE >> 2))
+ blocks = index - i;
+ else
+ blocks = SIZE >> 2;
+ }
+
+ if(msBlk->swap) {
+ unsigned char sblock_list[SIZE];
+ if(!squashfs_get_cached_block(inode->i_sb, (char *) sblock_list, block_ptr, offset, blocks << 2, &block_ptr, &offset)) {
+ ERROR("Unable to read block list [%d:%x]\n", block_ptr, offset);
+ return 0;
+ }
+ SQUASHFS_SWAP_INTS(((unsigned int *)block_list), ((unsigned int *)sblock_list), blocks);
+ } else
+ if(!squashfs_get_cached_block(inode->i_sb, (char *) block_list, block_ptr, offset, blocks << 2, &block_ptr, &offset)) {
+ ERROR("Unable to read block list [%d:%x]\n", block_ptr, offset);
+ return 0;
+ }
+ for(block_listp = (unsigned int *) block_list; i < index && blocks; i ++, block_listp ++, blocks --)
+ block += SQUASHFS_COMPRESSED_SIZE_BLOCK(*block_listp);
+ if(blocks >= readahead_blks)
+ break;
+ }
+
+ *bsize = *block_listp;
+ return block;
+}
+
+
+static int squashfs_readpage(struct file *file, struct page *page)
+{
+ struct inode *inode = page->mapping->host;
+ squashfs_sb_info *msBlk = &inode->i_sb->u.squashfs_sb;
+ squashfs_super_block *sBlk = &msBlk->sBlk;
+ unsigned char block_list[SIZE];
+ unsigned int bsize, block, i = 0, bytes = 0, byte_offset = 0;
+ int index = page->index >> (sBlk->block_log - PAGE_CACHE_SHIFT);
+ void *pageaddr = kmap(page);
+ struct squashfs_fragment_cache *fragment;
+ char *data_ptr = msBlk->read_page;
+
+ int mask = (1 << (sBlk->block_log - PAGE_CACHE_SHIFT)) - 1;
+ int start_index = page->index & ~mask;
+ int end_index = start_index | mask;
+
+ TRACE("Entered squashfs_readpage, page index %x, start block %x\n", (unsigned int) page->index,
+ inode->u.squashfs_i.start_block);
+
+ if(inode->u.squashfs_i.fragment_start_block == SQUASHFS_INVALID_BLK || index < (inode->i_size >> sBlk->block_log)) {
+ if((block = (msBlk->read_blocklist)(inode, index, 1, block_list, NULL, &bsize)) == 0)
+ goto skip_read;
+
+ down(&msBlk->read_page_mutex);
+ if(!(bytes = read_data(inode->i_sb, msBlk->read_page, block, bsize, 1, NULL))) {
+ ERROR("Unable to read page, block %x, size %x\n", block, bsize);
+ up(&msBlk->read_page_mutex);
+ goto skip_read;
+ }
+ } else {
+ if((fragment = get_cached_fragment(inode->i_sb, inode->u.squashfs_i.fragment_start_block, inode->u.squashfs_i.fragment_size)) == NULL) {
+ ERROR("Unable to read page, block %x, size %x\n", inode->u.squashfs_i.fragment_start_block, (int) inode->u.squashfs_i.fragment_size);
+ goto skip_read;
+ }
+ bytes = inode->u.squashfs_i.fragment_offset + (inode->i_size & (sBlk->block_size - 1));
+ byte_offset = inode->u.squashfs_i.fragment_offset;
+ data_ptr = fragment->data;
+ }
+
+ for(i = start_index; i <= end_index && byte_offset < bytes; i++, byte_offset += PAGE_CACHE_SIZE) {
+ struct page *push_page;
+ int available_bytes = (bytes - byte_offset) > PAGE_CACHE_SIZE ? PAGE_CACHE_SIZE : bytes - byte_offset;
+
+ TRACE("bytes %d, i %d, byte_offset %d, available_bytes %d\n", bytes, i, byte_offset, available_bytes);
+
+ if(i == page->index) {
+ memcpy(pageaddr, data_ptr + byte_offset, available_bytes);
+ memset(pageaddr + available_bytes, 0, PAGE_CACHE_SIZE - available_bytes);
+ kunmap(page);
+ flush_dcache_page(page);
+ SetPageUptodate(page);
+ UnlockPage(page);
+ } else if((push_page = grab_cache_page_nowait(page->mapping, i))) {
+ void *pageaddr = kmap(push_page);
+ memcpy(pageaddr, data_ptr + byte_offset, available_bytes);
+ memset(pageaddr + available_bytes, 0, PAGE_CACHE_SIZE - available_bytes);
+ kunmap(push_page);
+ flush_dcache_page(push_page);
+ SetPageUptodate(push_page);
+ UnlockPage(push_page);
+ page_cache_release(push_page);
+ }
+ }
+
+ if(inode->u.squashfs_i.fragment_start_block == SQUASHFS_INVALID_BLK || index < (inode->i_size >> sBlk->block_log))
+ up(&msBlk->read_page_mutex);
+ else
+ release_cached_fragment(msBlk, fragment);
+
+ return 0;
+
+skip_read:
+ memset(pageaddr + bytes, 0, PAGE_CACHE_SIZE - bytes);
+ kunmap(page);
+ flush_dcache_page(page);
+ SetPageUptodate(page);
+ UnlockPage(page);
+
+ return 0;
+}
+
+
+static int squashfs_readpage4K(struct file *file, struct page *page)
+{
+ struct inode *inode = page->mapping->host;
+ squashfs_sb_info *msBlk = &inode->i_sb->u.squashfs_sb;
+ squashfs_super_block *sBlk = &msBlk->sBlk;
+ unsigned char block_list[SIZE];
+ unsigned int bsize, block, bytes = 0;
+ void *pageaddr = kmap(page);
+
+ TRACE("Entered squashfs_readpage4K, page index %x, start block %x\n", (unsigned int) page->index,
+ inode->u.squashfs_i.start_block);
+
+ if(page->index < (inode->i_size >> sBlk->block_log)) {
+ block = (msBlk->read_blocklist)(inode, page->index, 1, block_list, NULL, &bsize);
+
+ if(!(bytes = read_data(inode->i_sb, pageaddr, block, bsize, 1, NULL)))
+ ERROR("Unable to read page, block %x, size %x\n", block, bsize);
+ } else {
+ struct squashfs_fragment_cache *fragment;
+
+ if((fragment = get_cached_fragment(inode->i_sb, inode->u.squashfs_i.fragment_start_block, inode->u.squashfs_i.fragment_size)) == NULL)
+ ERROR("Unable to read page, block %x, size %x\n", inode->u.squashfs_i.fragment_start_block, (int) inode->u.squashfs_i.fragment_size);
+ else {
+ bytes = inode->i_size & (sBlk->block_size - 1);
+ memcpy(pageaddr, fragment->data + inode->u.squashfs_i.fragment_offset, bytes);
+ release_cached_fragment(msBlk, fragment);
+ }
+ }
+
+ memset(pageaddr + bytes, 0, PAGE_CACHE_SIZE - bytes);
+ kunmap(page);
+ flush_dcache_page(page);
+ SetPageUptodate(page);
+ UnlockPage(page);
+
+ return 0;
+}
+
+
+#ifdef SQUASHFS_1_0_COMPATIBILITY
+static int squashfs_readpage_lessthan4K(struct file *file, struct page *page)
+{
+ struct inode *inode = page->mapping->host;
+ squashfs_sb_info *msBlk = &inode->i_sb->u.squashfs_sb;
+ squashfs_super_block *sBlk = &msBlk->sBlk;
+ unsigned char block_list[SIZE];
+ unsigned short *block_listp, block, bytes = 0;
+ int index = page->index << (PAGE_CACHE_SHIFT - sBlk->block_log);
+ int file_blocks = ((inode->i_size - 1) >> sBlk->block_log) + 1;
+ int readahead_blks = 1 << (PAGE_CACHE_SHIFT - sBlk->block_log);
+ void *pageaddr = kmap(page);
+
+ int i_end = index + (1 << (PAGE_CACHE_SHIFT - sBlk->block_log));
+ int byte;
+
+ TRACE("Entered squashfs_readpage_lessthan4K, page index %x, start block %x\n", (unsigned int) page->index,
+ inode->u.squashfs_i.start_block);
+
+ block = read_blocklist_1(inode, index, readahead_blks, block_list, (char **) &block_listp, NULL);
+
+ if(i_end > file_blocks)
+ i_end = file_blocks;
+
+ while(index < i_end) {
+ if(!(byte = read_data(inode->i_sb, pageaddr, block, *block_listp, 0, NULL))) {
+ ERROR("Unable to read page, block %x, size %x\n", block, *block_listp);
+ goto skip_read;
+ }
+ block += SQUASHFS_COMPRESSED_SIZE(*block_listp);
+ pageaddr += byte;
+ bytes += byte;
+ index ++;
+ block_listp ++;
+ }
+
+skip_read:
+ memset(pageaddr, 0, PAGE_CACHE_SIZE - bytes);
+ kunmap(page);
+ flush_dcache_page(page);
+ SetPageUptodate(page);
+ UnlockPage(page);
+
+ return 0;
+}
+#endif
+
+
+static int squashfs_readdir(struct file *file, void *dirent, filldir_t filldir)
+{
+ struct inode *i = file->f_dentry->d_inode;
+ squashfs_sb_info *msBlk = &i->i_sb->u.squashfs_sb;
+ squashfs_super_block *sBlk = &msBlk->sBlk;
+ int next_block = i->u.squashfs_i.start_block + sBlk->directory_table_start, next_offset =
+ i->u.squashfs_i.offset, length = 0, dirs_read = 0, dir_count;
+ squashfs_dir_header dirh;
+ char buffer[sizeof(squashfs_dir_entry) + SQUASHFS_NAME_LEN + 1];
+ squashfs_dir_entry *dire = (squashfs_dir_entry *) buffer;
+
+ TRACE("Entered squashfs_readdir [%x:%x]\n", next_block, next_offset);
+
+ while(length < i->i_size) {
+ /* read directory header */
+ if(msBlk->swap) {
+ squashfs_dir_header sdirh;
+ if(!squashfs_get_cached_block(i->i_sb, (char *) &sdirh, next_block,
+ next_offset, sizeof(sdirh), &next_block, &next_offset))
+ goto failed_read;
+ length += sizeof(sdirh);
+ SQUASHFS_SWAP_DIR_HEADER(&dirh, &sdirh);
+ } else {
+ if(!squashfs_get_cached_block(i->i_sb, (char *) &dirh, next_block,
+ next_offset, sizeof(dirh), &next_block, &next_offset))
+ goto failed_read;
+ length += sizeof(dirh);
+ }
+
+ dir_count = dirh.count + 1;
+ while(dir_count--) {
+ if(msBlk->swap) {
+ squashfs_dir_entry sdire;
+ if(!squashfs_get_cached_block(i->i_sb, (char *) &sdire, next_block,
+ next_offset, sizeof(sdire), &next_block, &next_offset))
+ goto failed_read;
+ length += sizeof(sdire);
+ SQUASHFS_SWAP_DIR_ENTRY(dire, &sdire);
+ } else {
+ if(!squashfs_get_cached_block(i->i_sb, (char *) dire, next_block,
+ next_offset, sizeof(*dire), &next_block, &next_offset))
+ goto failed_read;
+ length += sizeof(*dire);
+ }
+
+ if(!squashfs_get_cached_block(i->i_sb, dire->name, next_block,
+ next_offset, dire->size + 1, &next_block, &next_offset))
+ goto failed_read;
+ length += dire->size + 1;
+
+ if(file->f_pos >= length)
+ continue;
+
+ dire->name[dire->size + 1] = '\0';
+
+ TRACE("Calling filldir(%x, %s, %d, %d, %x:%x, %d)\n", (unsigned int) dirent,
+ dire->name, dire->size + 1, (int) file->f_pos,
+ dirh.start_block, dire->offset, squashfs_filetype_table[dire->type]);
+
+ if(filldir(dirent, dire->name, dire->size + 1, file->f_pos, SQUASHFS_MK_VFS_INODE(dirh.start_block,
+ dire->offset), squashfs_filetype_table[dire->type]) < 0) {
+ TRACE("Filldir returned less than 0\n");
+ return dirs_read;
+ }
+
+ file->f_pos = length;
+ dirs_read ++;
+ }
+ }
+
+ return dirs_read;
+
+failed_read:
+ ERROR("Unable to read directory block [%x:%x]\n", next_block, next_offset);
+ return 0;
+}
+
+
+static struct dentry *squashfs_lookup(struct inode *i, struct dentry *dentry)
+{
+ const char *name =dentry->d_name.name;
+ int len = dentry->d_name.len;
+ struct inode *inode = NULL;
+ squashfs_sb_info *msBlk = &i->i_sb->u.squashfs_sb;
+ squashfs_super_block *sBlk = &msBlk->sBlk;
+ int next_block = i->u.squashfs_i.start_block + sBlk->directory_table_start, next_offset =
+ i->u.squashfs_i.offset, length = 0, dir_count;
+ squashfs_dir_header dirh;
+ char buffer[sizeof(squashfs_dir_entry) + SQUASHFS_NAME_LEN];
+ squashfs_dir_entry *dire = (squashfs_dir_entry *) buffer;
+
+ TRACE("Entered squashfs_lookup [%x:%x]\n", next_block, next_offset);
+
+ while(length < i->i_size) {
+ /* read directory header */
+ if(msBlk->swap) {
+ squashfs_dir_header sdirh;
+ if(!squashfs_get_cached_block(i->i_sb, (char *) &sdirh, next_block, next_offset,
+ sizeof(sdirh), &next_block, &next_offset))
+ goto failed_read;
+ length += sizeof(sdirh);
+ SQUASHFS_SWAP_DIR_HEADER(&dirh, &sdirh);
+ } else {
+ if(!squashfs_get_cached_block(i->i_sb, (char *) &dirh, next_block, next_offset,
+ sizeof(dirh), &next_block, &next_offset))
+ goto failed_read;
+ length += sizeof(dirh);
+ }
+
+ dir_count = dirh.count + 1;
+ while(dir_count--) {
+ if(msBlk->swap) {
+ squashfs_dir_entry sdire;
+ if(!squashfs_get_cached_block(i->i_sb, (char *) &sdire,
+ next_block,next_offset, sizeof(sdire), &next_block, &next_offset))
+ goto failed_read;
+ length += sizeof(sdire);
+ SQUASHFS_SWAP_DIR_ENTRY(dire, &sdire);
+ } else {
+ if(!squashfs_get_cached_block(i->i_sb, (char *) dire,
+ next_block,next_offset, sizeof(*dire), &next_block, &next_offset))
+ goto failed_read;
+ length += sizeof(*dire);
+ }
+
+ if(!squashfs_get_cached_block(i->i_sb, dire->name,
+ next_block, next_offset, dire->size + 1, &next_block, &next_offset))
+ goto failed_read;
+ length += dire->size + 1;
+
+ if((len == dire->size + 1) && !strncmp(name, dire->name, len)) {
+ squashfs_inode ino = SQUASHFS_MKINODE(dirh.start_block, dire->offset);
+
+ TRACE("calling squashfs_iget for directory entry %s, inode %x:%x\n",
+ name, dirh.start_block, dire->offset);
+
+ inode = (msBlk->iget)(i->i_sb, ino);
+
+ goto exit_loop;
+ }
+ }
+ }
+
+exit_loop:
+ d_add(dentry, inode);
+ return ERR_PTR(0);
+
+failed_read:
+ ERROR("Unable to read directory block [%x:%x]\n", next_block, next_offset);
+ goto exit_loop;
+}
+
+
+static void squashfs_put_super(struct super_block *s)
+{
+ if(s->u.squashfs_sb.block_cache) kfree(s->u.squashfs_sb.block_cache);
+ if(s->u.squashfs_sb.read_data) kfree(s->u.squashfs_sb.read_data);
+ if(s->u.squashfs_sb.read_page) kfree(s->u.squashfs_sb.read_page);
+ if(s->u.squashfs_sb.uid) kfree(s->u.squashfs_sb.uid);
+ s->u.squashfs_sb.block_cache = (void *) s->u.squashfs_sb.uid =
+ s->u.squashfs_sb.read_data = s->u.squashfs_sb.read_page = NULL;
+}
+
+
+static int __init init_squashfs_fs(void)
+{
+
+ if(!(stream.workspace = (char *) vmalloc(zlib_inflate_workspacesize()))) {
+ ERROR("Failed to allocate zlib workspace\n");
+ return -ENOMEM;
+ }
+ return register_filesystem(&squashfs_fs_type);
+}
+
+
+static void __exit exit_squashfs_fs(void)
+{
+ vfree(stream.workspace);
+ unregister_filesystem(&squashfs_fs_type);
+}
+
+
+EXPORT_NO_SYMBOLS;
+
+module_init(init_squashfs_fs);
+module_exit(exit_squashfs_fs);
+MODULE_DESCRIPTION("squashfs, a compressed read-only filesystem");
+MODULE_AUTHOR("Phillip Lougher <plougher@users.sourceforge.net>");
+MODULE_LICENSE("GPL");
diff -Nurb src/linux/linux.orig/include/linux/fs.h src/linux/linux/include/linux/fs.h
--- src/linux/linux.orig/include/linux/fs.h 2003-07-04 04:12:25.000000000 -0400
+++ src/linux/linux/include/linux/fs.h 2004-05-25 21:13:03.000000000 -0400
@@ -313,6 +313,7 @@
#include <linux/usbdev_fs_i.h>
#include <linux/jffs2_fs_i.h>
#include <linux/cramfs_fs_sb.h>
+#include <linux/squashfs_fs_i.h>
/*
* Attribute flags. These should be or-ed together to figure out what
@@ -503,6 +504,7 @@
struct socket socket_i;
struct usbdev_inode_info usbdev_i;
struct jffs2_inode_info jffs2_i;
+ struct squashfs_inode_info squashfs_i;
void *generic_ip;
} u;
};
@@ -697,6 +699,7 @@
#include <linux/usbdev_fs_sb.h>
#include <linux/cramfs_fs_sb.h>
#include <linux/jffs2_fs_sb.h>
+#include <linux/squashfs_fs_sb.h>
extern struct list_head super_blocks;
extern spinlock_t sb_lock;
@@ -755,6 +758,7 @@
struct usbdev_sb_info usbdevfs_sb;
struct jffs2_sb_info jffs2_sb;
struct cramfs_sb_info cramfs_sb;
+ struct squashfs_sb_info squashfs_sb;
void *generic_sbp;
} u;
/*
diff -Nurb src/linux/linux.orig/include/linux/fs.h.orig src/linux/linux/include/linux/fs.h.orig
--- src/linux/linux.orig/include/linux/fs.h.orig 1969-12-31 19:00:00.000000000 -0500
+++ src/linux/linux/include/linux/fs.h.orig 2004-05-25 21:12:42.000000000 -0400
@@ -0,0 +1,1626 @@
+#ifndef _LINUX_FS_H
+#define _LINUX_FS_H
+
+/*
+ * This file has definitions for some important file table
+ * structures etc.
+ */
+
+#include <linux/config.h>
+#include <linux/linkage.h>
+#include <linux/limits.h>
+#include <linux/wait.h>
+#include <linux/types.h>
+#include <linux/vfs.h>
+#include <linux/net.h>
+#include <linux/kdev_t.h>
+#include <linux/ioctl.h>
+#include <linux/list.h>
+#include <linux/dcache.h>
+#include <linux/stat.h>
+#include <linux/cache.h>
+#include <linux/stddef.h>
+#include <linux/string.h>
+
+#include <asm/atomic.h>
+#include <asm/bitops.h>
+
+struct poll_table_struct;
+
+
+/*
+ * It's silly to have NR_OPEN bigger than NR_FILE, but you can change
+ * the file limit at runtime and only root can increase the per-process
+ * nr_file rlimit, so it's safe to set up a ridiculously high absolute
+ * upper limit on files-per-process.
+ *
+ * Some programs (notably those using select()) may have to be
+ * recompiled to take full advantage of the new limits..
+ */
+
+/* Fixed constants first: */
+#undef NR_OPEN
+#define NR_OPEN (1024*1024) /* Absolute upper limit on fd num */
+#define INR_OPEN 1024 /* Initial setting for nfile rlimits */
+
+#define BLOCK_SIZE_BITS 10
+#define BLOCK_SIZE (1<<BLOCK_SIZE_BITS)
+
+/* And dynamically-tunable limits and defaults: */
+struct files_stat_struct {
+ int nr_files; /* read only */
+ int nr_free_files; /* read only */
+ int max_files; /* tunable */
+};
+extern struct files_stat_struct files_stat;
+
+struct inodes_stat_t {
+ int nr_inodes;
+ int nr_unused;
+ int dummy[5];
+};
+extern struct inodes_stat_t inodes_stat;
+
+extern int leases_enable, dir_notify_enable, lease_break_time;
+
+#define NR_FILE 8192 /* this can well be larger on a larger system */
+#define NR_RESERVED_FILES 10 /* reserved for root */
+#define NR_SUPER 256
+
+#define MAY_EXEC 1
+#define MAY_WRITE 2
+#define MAY_READ 4
+
+#define FMODE_READ 1
+#define FMODE_WRITE 2
+
+#define READ 0
+#define WRITE 1
+#define READA 2 /* read-ahead - don't block if no resources */
+#define SPECIAL 4 /* For non-blockdevice requests in request queue */
+
+#define SEL_IN 1
+#define SEL_OUT 2
+#define SEL_EX 4
+
+/* public flags for file_system_type */
+#define FS_REQUIRES_DEV 1
+#define FS_NO_DCACHE 2 /* Only dcache the necessary things. */
+#define FS_NO_PRELIM 4 /* prevent preloading of dentries, even if
+ * FS_NO_DCACHE is not set.
+ */
+#define FS_SINGLE 8 /* Filesystem that can have only one superblock */
+#define FS_NOMOUNT 16 /* Never mount from userland */
+#define FS_LITTER 32 /* Keeps the tree in dcache */
+#define FS_ODD_RENAME 32768 /* Temporary stuff; will go away as soon
+ * as nfs_rename() will be cleaned up
+ */
+/*
+ * These are the fs-independent mount-flags: up to 32 flags are supported
+ */
+#define MS_RDONLY 1 /* Mount read-only */
+#define MS_NOSUID 2 /* Ignore suid and sgid bits */
+#define MS_NODEV 4 /* Disallow access to device special files */
+#define MS_NOEXEC 8 /* Disallow program execution */
+#define MS_SYNCHRONOUS 16 /* Writes are synced at once */
+#define MS_REMOUNT 32 /* Alter flags of a mounted FS */
+#define MS_MANDLOCK 64 /* Allow mandatory locks on an FS */
+#define MS_NOATIME 1024 /* Do not update access times. */
+#define MS_NODIRATIME 2048 /* Do not update directory access times */
+#define MS_BIND 4096
+#define MS_MOVE 8192
+#define MS_REC 16384
+#define MS_VERBOSE 32768
+#define MS_ACTIVE (1<<30)
+#define MS_NOUSER (1<<31)
+
+/*
+ * Superblock flags that can be altered by MS_REMOUNT
+ */
+#define MS_RMT_MASK (MS_RDONLY|MS_SYNCHRONOUS|MS_MANDLOCK|MS_NOATIME|\
+ MS_NODIRATIME)
+
+/*
+ * Old magic mount flag and mask
+ */
+#define MS_MGC_VAL 0xC0ED0000
+#define MS_MGC_MSK 0xffff0000
+
+/* Inode flags - they have nothing to superblock flags now */
+
+#define S_SYNC 1 /* Writes are synced at once */
+#define S_NOATIME 2 /* Do not update access times */
+#define S_QUOTA 4 /* Quota initialized for file */
+#define S_APPEND 8 /* Append-only file */
+#define S_IMMUTABLE 16 /* Immutable file */
+#define S_DEAD 32 /* removed, but still open directory */
+#define S_NOQUOTA 64 /* Inode is not counted to quota */
+
+/*
+ * Note that nosuid etc flags are inode-specific: setting some file-system
+ * flags just means all the inodes inherit those flags by default. It might be
+ * possible to override it selectively if you really wanted to with some
+ * ioctl() that is not currently implemented.
+ *
+ * Exception: MS_RDONLY is always applied to the entire file system.
+ *
+ * Unfortunately, it is possible to change a filesystems flags with it mounted
+ * with files in use. This means that all of the inodes will not have their
+ * i_flags updated. Hence, i_flags no longer inherit the superblock mount
+ * flags, so these have to be checked separately. -- rmk@arm.uk.linux.org
+ */
+#define __IS_FLG(inode,flg) ((inode)->i_sb->s_flags & (flg))
+
+#define IS_RDONLY(inode) ((inode)->i_sb->s_flags & MS_RDONLY)
+#define IS_SYNC(inode) (__IS_FLG(inode, MS_SYNCHRONOUS) || ((inode)->i_flags & S_SYNC))
+#define IS_MANDLOCK(inode) __IS_FLG(inode, MS_MANDLOCK)
+
+#define IS_QUOTAINIT(inode) ((inode)->i_flags & S_QUOTA)
+#define IS_NOQUOTA(inode) ((inode)->i_flags & S_NOQUOTA)
+#define IS_APPEND(inode) ((inode)->i_flags & S_APPEND)
+#define IS_IMMUTABLE(inode) ((inode)->i_flags & S_IMMUTABLE)
+#define IS_NOATIME(inode) (__IS_FLG(inode, MS_NOATIME) || ((inode)->i_flags & S_NOATIME))
+#define IS_NODIRATIME(inode) __IS_FLG(inode, MS_NODIRATIME)
+
+#define IS_DEADDIR(inode) ((inode)->i_flags & S_DEAD)
+
+/* the read-only stuff doesn't really belong here, but any other place is
+ probably as bad and I don't want to create yet another include file. */
+
+#define BLKROSET _IO(0x12,93) /* set device read-only (0 = read-write) */
+#define BLKROGET _IO(0x12,94) /* get read-only status (0 = read_write) */
+#define BLKRRPART _IO(0x12,95) /* re-read partition table */
+#define BLKGETSIZE _IO(0x12,96) /* return device size /512 (long *arg) */
+#define BLKFLSBUF _IO(0x12,97) /* flush buffer cache */
+#define BLKRASET _IO(0x12,98) /* Set read ahead for block device */
+#define BLKRAGET _IO(0x12,99) /* get current read ahead setting */
+#define BLKFRASET _IO(0x12,100)/* set filesystem (mm/filemap.c) read-ahead */
+#define BLKFRAGET _IO(0x12,101)/* get filesystem (mm/filemap.c) read-ahead */
+#define BLKSECTSET _IO(0x12,102)/* set max sectors per request (ll_rw_blk.c) */
+#define BLKSECTGET _IO(0x12,103)/* get max sectors per request (ll_rw_blk.c) */
+#define BLKSSZGET _IO(0x12,104)/* get block device sector size */
+/* A jump here: 108-111 have been used for various private purposes. */
+#define BLKBSZGET _IOR(0x12,112,sizeof(int))
+#define BLKBSZSET _IOW(0x12,113,sizeof(int))
+#define BLKGETSIZE64 _IOR(0x12,114,sizeof(u64)) /* return device size in bytes (u64 *arg) */
+
+#define BMAP_IOCTL 1 /* obsolete - kept for compatibility */
+#define FIBMAP _IO(0x00,1) /* bmap access */
+#define FIGETBSZ _IO(0x00,2) /* get the block size used for bmap */
+
+#ifdef __KERNEL__
+
+#include <asm/semaphore.h>
+#include <asm/byteorder.h>
+
+extern void update_atime (struct inode *);
+#define UPDATE_ATIME(inode) update_atime (inode)
+
+extern void buffer_init(unsigned long);
+extern void inode_init(unsigned long);
+extern void mnt_init(unsigned long);
+extern void files_init(unsigned long mempages);
+
+/* bh state bits */
+enum bh_state_bits {
+ BH_Uptodate, /* 1 if the buffer contains valid data */
+ BH_Dirty, /* 1 if the buffer is dirty */
+ BH_Lock, /* 1 if the buffer is locked */
+ BH_Req, /* 0 if the buffer has been invalidated */
+ BH_Mapped, /* 1 if the buffer has a disk mapping */
+ BH_New, /* 1 if the buffer is new and not yet written out */
+ BH_Async, /* 1 if the buffer is under end_buffer_io_async I/O */
+ BH_Wait_IO, /* 1 if we should write out this buffer */
+ BH_Launder, /* 1 if we can throttle on this buffer */
+ BH_JBD, /* 1 if it has an attached journal_head */
+
+ BH_PrivateStart,/* not a state bit, but the first bit available
+ * for private allocation by other entities
+ */
+};
+
+#define MAX_BUF_PER_PAGE (PAGE_CACHE_SIZE / 512)
+
+/*
+ * Try to keep the most commonly used fields in single cache lines (16
+ * bytes) to improve performance. This ordering should be
+ * particularly beneficial on 32-bit processors.
+ *
+ * We use the first 16 bytes for the data which is used in searches
+ * over the block hash lists (ie. getblk() and friends).
+ *
+ * The second 16 bytes we use for lru buffer scans, as used by
+ * sync_buffers() and refill_freelist(). -- sct
+ */
+struct buffer_head {
+ /* First cache line: */
+ struct buffer_head *b_next; /* Hash queue list */
+ unsigned long b_blocknr; /* block number */
+ unsigned short b_size; /* block size */
+ unsigned short b_list; /* List that this buffer appears */
+ kdev_t b_dev; /* device (B_FREE = free) */
+
+ atomic_t b_count; /* users using this block */
+ kdev_t b_rdev; /* Real device */
+ unsigned long b_state; /* buffer state bitmap (see above) */
+ unsigned long b_flushtime; /* Time when (dirty) buffer should be written */
+
+ struct buffer_head *b_next_free;/* lru/free list linkage */
+ struct buffer_head *b_prev_free;/* doubly linked list of buffers */
+ struct buffer_head *b_this_page;/* circular list of buffers in one page */
+ struct buffer_head *b_reqnext; /* request queue */
+
+ struct buffer_head **b_pprev; /* doubly linked list of hash-queue */
+ char * b_data; /* pointer to data block */
+ struct page *b_page; /* the page this bh is mapped to */
+ void (*b_end_io)(struct buffer_head *bh, int uptodate); /* I/O completion */
+ void *b_private; /* reserved for b_end_io */
+
+ unsigned long b_rsector; /* Real buffer location on disk */
+ wait_queue_head_t b_wait;
+
+ struct inode * b_inode;
+ struct list_head b_inode_buffers; /* doubly linked list of inode dirty buffers */
+};
+
+typedef void (bh_end_io_t)(struct buffer_head *bh, int uptodate);
+void init_buffer(struct buffer_head *, bh_end_io_t *, void *);
+
+#define __buffer_state(bh, state) (((bh)->b_state & (1UL << BH_##state)) != 0)
+
+#define buffer_uptodate(bh) __buffer_state(bh,Uptodate)
+#define buffer_dirty(bh) __buffer_state(bh,Dirty)
+#define buffer_locked(bh) __buffer_state(bh,Lock)
+#define buffer_req(bh) __buffer_state(bh,Req)
+#define buffer_mapped(bh) __buffer_state(bh,Mapped)
+#define buffer_new(bh) __buffer_state(bh,New)
+#define buffer_async(bh) __buffer_state(bh,Async)
+#define buffer_launder(bh) __buffer_state(bh,Launder)
+
+#define bh_offset(bh) ((unsigned long)(bh)->b_data & ~PAGE_MASK)
+
+extern void set_bh_page(struct buffer_head *bh, struct page *page, unsigned long offset);
+
+#define touch_buffer(bh) mark_page_accessed(bh->b_page)
+
+
+#include <linux/pipe_fs_i.h>
+#include <linux/minix_fs_i.h>
+#include <linux/ext2_fs_i.h>
+#include <linux/ext3_fs_i.h>
+#include <linux/hpfs_fs_i.h>
+#include <linux/ntfs_fs_i.h>
+#include <linux/msdos_fs_i.h>
+#include <linux/umsdos_fs_i.h>
+#include <linux/iso_fs_i.h>
+#include <linux/nfs_fs_i.h>
+#include <linux/sysv_fs_i.h>
+#include <linux/affs_fs_i.h>
+#include <linux/ufs_fs_i.h>
+#include <linux/efs_fs_i.h>
+#include <linux/coda_fs_i.h>
+#include <linux/romfs_fs_i.h>
+#include <linux/shmem_fs.h>
+#include <linux/smb_fs_i.h>
+#include <linux/hfs_fs_i.h>
+#include <linux/adfs_fs_i.h>
+#include <linux/qnx4_fs_i.h>
+#include <linux/reiserfs_fs_i.h>
+#include <linux/bfs_fs_i.h>
+#include <linux/udf_fs_i.h>
+#include <linux/ncp_fs_i.h>
+#include <linux/proc_fs_i.h>
+#include <linux/usbdev_fs_i.h>
+#include <linux/jffs2_fs_i.h>
+#include <linux/cramfs_fs_sb.h>
+
+/*
+ * Attribute flags. These should be or-ed together to figure out what
+ * has been changed!
+ */
+#define ATTR_MODE 1
+#define ATTR_UID 2
+#define ATTR_GID 4
+#define ATTR_SIZE 8
+#define ATTR_ATIME 16
+#define ATTR_MTIME 32
+#define ATTR_CTIME 64
+#define ATTR_ATIME_SET 128
+#define ATTR_MTIME_SET 256
+#define ATTR_FORCE 512 /* Not a change, but a change it */
+#define ATTR_ATTR_FLAG 1024
+
+/*
+ * This is the Inode Attributes structure, used for notify_change(). It
+ * uses the above definitions as flags, to know which values have changed.
+ * Also, in this manner, a Filesystem can look at only the values it cares
+ * about. Basically, these are the attributes that the VFS layer can
+ * request to change from the FS layer.
+ *
+ * Derek Atkins <warlord@MIT.EDU> 94-10-20
+ */
+struct iattr {
+ unsigned int ia_valid;
+ umode_t ia_mode;
+ uid_t ia_uid;
+ gid_t ia_gid;
+ loff_t ia_size;
+ time_t ia_atime;
+ time_t ia_mtime;
+ time_t ia_ctime;
+ unsigned int ia_attr_flags;
+};
+
+/*
+ * This is the inode attributes flag definitions
+ */
+#define ATTR_FLAG_SYNCRONOUS 1 /* Syncronous write */
+#define ATTR_FLAG_NOATIME 2 /* Don't update atime */
+#define ATTR_FLAG_APPEND 4 /* Append-only file */
+#define ATTR_FLAG_IMMUTABLE 8 /* Immutable file */
+#define ATTR_FLAG_NODIRATIME 16 /* Don't update atime for directory */
+
+/*
+ * Includes for diskquotas and mount structures.
+ */
+#include <linux/quota.h>
+#include <linux/mount.h>
+
+/*
+ * oh the beauties of C type declarations.
+ */
+struct page;
+struct address_space;
+struct kiobuf;
+
+struct address_space_operations {
+ int (*writepage)(struct page *);
+ int (*readpage)(struct file *, struct page *);
+ int (*sync_page)(struct page *);
+ /*
+ * ext3 requires that a successful prepare_write() call be followed
+ * by a commit_write() call - they must be balanced
+ */
+ int (*prepare_write)(struct file *, struct page *, unsigned, unsigned);
+ int (*commit_write)(struct file *, struct page *, unsigned, unsigned);
+ /* Unfortunately this kludge is needed for FIBMAP. Don't use it */
+ int (*bmap)(struct address_space *, long);
+ int (*flushpage) (struct page *, unsigned long);
+ int (*releasepage) (struct page *, int);
+#define KERNEL_HAS_O_DIRECT /* this is for modules out of the kernel */
+ int (*direct_IO)(int, struct inode *, struct kiobuf *, unsigned long, int);
+};
+
+struct address_space {
+ struct list_head clean_pages; /* list of clean pages */
+ struct list_head dirty_pages; /* list of dirty pages */
+ struct list_head locked_pages; /* list of locked pages */
+ unsigned long nrpages; /* number of total pages */
+ struct address_space_operations *a_ops; /* methods */
+ struct inode *host; /* owner: inode, block_device */
+ struct vm_area_struct *i_mmap; /* list of private mappings */
+ struct vm_area_struct *i_mmap_shared; /* list of shared mappings */
+ spinlock_t i_shared_lock; /* and spinlock protecting it */
+ int gfp_mask; /* how to allocate the pages */
+};
+
+struct char_device {
+ struct list_head hash;
+ atomic_t count;
+ dev_t dev;
+ atomic_t openers;
+ struct semaphore sem;
+};
+
+struct block_device {
+ struct list_head bd_hash;
+ atomic_t bd_count;
+ struct inode * bd_inode;
+ dev_t bd_dev; /* not a kdev_t - it's a search key */
+ int bd_openers;
+ const struct block_device_operations *bd_op;
+ struct semaphore bd_sem; /* open/close mutex */
+ struct list_head bd_inodes;
+};
+
+struct inode {
+ struct list_head i_hash;
+ struct list_head i_list;
+ struct list_head i_dentry;
+
+ struct list_head i_dirty_buffers;
+ struct list_head i_dirty_data_buffers;
+
+ unsigned long i_ino;
+ atomic_t i_count;
+ kdev_t i_dev;
+ umode_t i_mode;
+ nlink_t i_nlink;
+ uid_t i_uid;
+ gid_t i_gid;
+ kdev_t i_rdev;
+ loff_t i_size;
+ time_t i_atime;
+ time_t i_mtime;
+ time_t i_ctime;
+ unsigned int i_blkbits;
+ unsigned long i_blksize;
+ unsigned long i_blocks;
+ unsigned long i_version;
+ struct semaphore i_sem;
+ struct semaphore i_zombie;
+ struct inode_operations *i_op;
+ struct file_operations *i_fop; /* former ->i_op->default_file_ops */
+ struct super_block *i_sb;
+ wait_queue_head_t i_wait;
+ struct file_lock *i_flock;
+ struct address_space *i_mapping;
+ struct address_space i_data;
+ struct dquot *i_dquot[MAXQUOTAS];
+ /* These three should probably be a union */
+ struct list_head i_devices;
+ struct pipe_inode_info *i_pipe;
+ struct block_device *i_bdev;
+ struct char_device *i_cdev;
+
+ unsigned long i_dnotify_mask; /* Directory notify events */
+ struct dnotify_struct *i_dnotify; /* for directory notifications */
+
+ unsigned long i_state;
+
+ unsigned int i_flags;
+ unsigned char i_sock;
+
+ atomic_t i_writecount;
+ unsigned int i_attr_flags;
+ __u32 i_generation;
+ union {
+ struct minix_inode_info minix_i;
+ struct ext2_inode_info ext2_i;
+ struct ext3_inode_info ext3_i;
+ struct hpfs_inode_info hpfs_i;
+ struct ntfs_inode_info ntfs_i;
+ struct msdos_inode_info msdos_i;
+ struct umsdos_inode_info umsdos_i;
+ struct iso_inode_info isofs_i;
+ struct nfs_inode_info nfs_i;
+ struct sysv_inode_info sysv_i;
+ struct affs_inode_info affs_i;
+ struct ufs_inode_info ufs_i;
+ struct efs_inode_info efs_i;
+ struct romfs_inode_info romfs_i;
+ struct shmem_inode_info shmem_i;
+ struct coda_inode_info coda_i;
+ struct smb_inode_info smbfs_i;
+ struct hfs_inode_info hfs_i;
+ struct adfs_inode_info adfs_i;
+ struct qnx4_inode_info qnx4_i;
+ struct reiserfs_inode_info reiserfs_i;
+ struct bfs_inode_info bfs_i;
+ struct udf_inode_info udf_i;
+ struct ncp_inode_info ncpfs_i;
+ struct proc_inode_info proc_i;
+ struct socket socket_i;
+ struct usbdev_inode_info usbdev_i;
+ struct jffs2_inode_info jffs2_i;
+ void *generic_ip;
+ } u;
+};
+
+struct fown_struct {
+ int pid; /* pid or -pgrp where SIGIO should be sent */
+ uid_t uid, euid; /* uid/euid of process setting the owner */
+ int signum; /* posix.1b rt signal to be delivered on IO */
+};
+
+struct file {
+ struct list_head f_list;
+ struct dentry *f_dentry;
+ struct vfsmount *f_vfsmnt;
+ struct file_operations *f_op;
+ atomic_t f_count;
+ unsigned int f_flags;
+ mode_t f_mode;
+ loff_t f_pos;
+ unsigned long f_reada, f_ramax, f_raend, f_ralen, f_rawin;
+ struct fown_struct f_owner;
+ unsigned int f_uid, f_gid;
+ int f_error;
+
+ unsigned long f_version;
+
+ /* needed for tty driver, and maybe others */
+ void *private_data;
+
+ /* preallocated helper kiobuf to speedup O_DIRECT */
+ struct kiobuf *f_iobuf;
+ long f_iobuf_lock;
+};
+extern spinlock_t files_lock;
+#define file_list_lock() spin_lock(&files_lock);
+#define file_list_unlock() spin_unlock(&files_lock);
+
+#define get_file(x) atomic_inc(&(x)->f_count)
+#define file_count(x) atomic_read(&(x)->f_count)
+
+extern int init_private_file(struct file *, struct dentry *, int);
+
+#define MAX_NON_LFS ((1UL<<31) - 1)
+
+/* Page cache limit. The filesystems should put that into their s_maxbytes
+ limits, otherwise bad things can happen in VM. */
+#if BITS_PER_LONG==32
+#define MAX_LFS_FILESIZE (((u64)PAGE_CACHE_SIZE << (BITS_PER_LONG-1))-1)
+#elif BITS_PER_LONG==64
+#define MAX_LFS_FILESIZE 0x7fffffffffffffff
+#endif
+
+#define FL_POSIX 1
+#define FL_FLOCK 2
+#define FL_BROKEN 4 /* broken flock() emulation */
+#define FL_ACCESS 8 /* for processes suspended by mandatory locking */
+#define FL_LOCKD 16 /* lock held by rpc.lockd */
+#define FL_LEASE 32 /* lease held on this file */
+
+/*
+ * The POSIX file lock owner is determined by
+ * the "struct files_struct" in the thread group
+ * (or NULL for no owner - BSD locks).
+ *
+ * Lockd stuffs a "host" pointer into this.
+ */
+typedef struct files_struct *fl_owner_t;
+
+struct file_lock {
+ struct file_lock *fl_next; /* singly linked list for this inode */
+ struct list_head fl_link; /* doubly linked list of all locks */
+ struct list_head fl_block; /* circular list of blocked processes */
+ fl_owner_t fl_owner;
+ unsigned int fl_pid;
+ wait_queue_head_t fl_wait;
+ struct file *fl_file;
+ unsigned char fl_flags;
+ unsigned char fl_type;
+ loff_t fl_start;
+ loff_t fl_end;
+
+ void (*fl_notify)(struct file_lock *); /* unblock callback */
+ void (*fl_insert)(struct file_lock *); /* lock insertion callback */
+ void (*fl_remove)(struct file_lock *); /* lock removal callback */
+
+ struct fasync_struct * fl_fasync; /* for lease break notifications */
+ unsigned long fl_break_time; /* for nonblocking lease breaks */
+
+ union {
+ struct nfs_lock_info nfs_fl;
+ } fl_u;
+};
+
+/* The following constant reflects the upper bound of the file/locking space */
+#ifndef OFFSET_MAX
+#define INT_LIMIT(x) (~((x)1 << (sizeof(x)*8 - 1)))
+#define OFFSET_MAX INT_LIMIT(loff_t)
+#define OFFT_OFFSET_MAX INT_LIMIT(off_t)
+#endif
+
+extern struct list_head file_lock_list;
+
+#include <linux/fcntl.h>
+
+extern int fcntl_getlk(unsigned int, struct flock *);
+extern int fcntl_setlk(unsigned int, unsigned int, struct flock *);
+
+extern int fcntl_getlk64(unsigned int, struct flock64 *);
+extern int fcntl_setlk64(unsigned int, unsigned int, struct flock64 *);
+
+/* fs/locks.c */
+extern void locks_init_lock(struct file_lock *);
+extern void locks_copy_lock(struct file_lock *, struct file_lock *);
+extern void locks_remove_posix(struct file *, fl_owner_t);
+extern void locks_remove_flock(struct file *);
+extern struct file_lock *posix_test_lock(struct file *, struct file_lock *);
+extern int posix_lock_file(struct file *, struct file_lock *, unsigned int);
+extern void posix_block_lock(struct file_lock *, struct file_lock *);
+extern void posix_unblock_lock(struct file_lock *);
+extern int posix_locks_deadlock(struct file_lock *, struct file_lock *);
+extern int __get_lease(struct inode *inode, unsigned int flags);
+extern time_t lease_get_mtime(struct inode *);
+extern int lock_may_read(struct inode *, loff_t start, unsigned long count);
+extern int lock_may_write(struct inode *, loff_t start, unsigned long count);
+
+struct fasync_struct {
+ int magic;
+ int fa_fd;
+ struct fasync_struct *fa_next; /* singly linked list */
+ struct file *fa_file;
+};
+
+#define FASYNC_MAGIC 0x4601
+
+/* SMP safe fasync helpers: */
+extern int fasync_helper(int, struct file *, int, struct fasync_struct **);
+/* can be called from interrupts */
+extern void kill_fasync(struct fasync_struct **, int, int);
+/* only for net: no internal synchronization */
+extern void __kill_fasync(struct fasync_struct *, int, int);
+
+struct nameidata {
+ struct dentry *dentry;
+ struct vfsmount *mnt;
+ struct qstr last;
+ unsigned int flags;
+ int last_type;
+};
+
+#define DQUOT_USR_ENABLED 0x01 /* User diskquotas enabled */
+#define DQUOT_GRP_ENABLED 0x02 /* Group diskquotas enabled */
+
+struct quota_mount_options
+{
+ unsigned int flags; /* Flags for diskquotas on this device */
+ struct semaphore dqio_sem; /* lock device while I/O in progress */
+ struct semaphore dqoff_sem; /* serialize quota_off() and quota_on() on device */
+ struct file *files[MAXQUOTAS]; /* fp's to quotafiles */
+ time_t inode_expire[MAXQUOTAS]; /* expiretime for inode-quota */
+ time_t block_expire[MAXQUOTAS]; /* expiretime for block-quota */
+ char rsquash[MAXQUOTAS]; /* for quotas threat root as any other user */
+};
+
+/*
+ * Umount options
+ */
+
+#define MNT_FORCE 0x00000001 /* Attempt to forcibily umount */
+#define MNT_DETACH 0x00000002 /* Just detach from the tree */
+
+#include <linux/minix_fs_sb.h>
+#include <linux/ext2_fs_sb.h>
+#include <linux/ext3_fs_sb.h>
+#include <linux/hpfs_fs_sb.h>
+#include <linux/ntfs_fs_sb.h>
+#include <linux/msdos_fs_sb.h>
+#include <linux/iso_fs_sb.h>
+#include <linux/nfs_fs_sb.h>
+#include <linux/sysv_fs_sb.h>
+#include <linux/affs_fs_sb.h>
+#include <linux/ufs_fs_sb.h>
+#include <linux/efs_fs_sb.h>
+#include <linux/romfs_fs_sb.h>
+#include <linux/smb_fs_sb.h>
+#include <linux/hfs_fs_sb.h>
+#include <linux/adfs_fs_sb.h>
+#include <linux/qnx4_fs_sb.h>
+#include <linux/reiserfs_fs_sb.h>
+#include <linux/bfs_fs_sb.h>
+#include <linux/udf_fs_sb.h>
+#include <linux/ncp_fs_sb.h>
+#include <linux/usbdev_fs_sb.h>
+#include <linux/cramfs_fs_sb.h>
+#include <linux/jffs2_fs_sb.h>
+
+extern struct list_head super_blocks;
+extern spinlock_t sb_lock;
+
+#define sb_entry(list) list_entry((list), struct super_block, s_list)
+#define S_BIAS (1<<30)
+struct super_block {
+ struct list_head s_list; /* Keep this first */
+ kdev_t s_dev;
+ unsigned long s_blocksize;
+ unsigned char s_blocksize_bits;
+ unsigned char s_dirt;
+ unsigned long long s_maxbytes; /* Max file size */
+ struct file_system_type *s_type;
+ struct super_operations *s_op;
+ struct dquot_operations *dq_op;
+ unsigned long s_flags;
+ unsigned long s_magic;
+ struct dentry *s_root;
+ struct rw_semaphore s_umount;
+ struct semaphore s_lock;
+ int s_count;
+ atomic_t s_active;
+
+ struct list_head s_dirty; /* dirty inodes */
+ struct list_head s_locked_inodes;/* inodes being synced */
+ struct list_head s_files;
+
+ struct block_device *s_bdev;
+ struct list_head s_instances;
+ struct quota_mount_options s_dquot; /* Diskquota specific options */
+
+ union {
+ struct minix_sb_info minix_sb;
+ struct ext2_sb_info ext2_sb;
+ struct ext3_sb_info ext3_sb;
+ struct hpfs_sb_info hpfs_sb;
+ struct ntfs_sb_info ntfs_sb;
+ struct msdos_sb_info msdos_sb;
+ struct isofs_sb_info isofs_sb;
+ struct nfs_sb_info nfs_sb;
+ struct sysv_sb_info sysv_sb;
+ struct affs_sb_info affs_sb;
+ struct ufs_sb_info ufs_sb;
+ struct efs_sb_info efs_sb;
+ struct shmem_sb_info shmem_sb;
+ struct romfs_sb_info romfs_sb;
+ struct smb_sb_info smbfs_sb;
+ struct hfs_sb_info hfs_sb;
+ struct adfs_sb_info adfs_sb;
+ struct qnx4_sb_info qnx4_sb;
+ struct reiserfs_sb_info reiserfs_sb;
+ struct bfs_sb_info bfs_sb;
+ struct udf_sb_info udf_sb;
+ struct ncp_sb_info ncpfs_sb;
+ struct usbdev_sb_info usbdevfs_sb;
+ struct jffs2_sb_info jffs2_sb;
+ struct cramfs_sb_info cramfs_sb;
+ void *generic_sbp;
+ } u;
+ /*
+ * The next field is for VFS *only*. No filesystems have any business
+ * even looking at it. You had been warned.
+ */
+ struct semaphore s_vfs_rename_sem; /* Kludge */
+
+ /* The next field is used by knfsd when converting a (inode number based)
+ * file handle into a dentry. As it builds a path in the dcache tree from
+ * the bottom up, there may for a time be a subpath of dentrys which is not
+ * connected to the main tree. This semaphore ensure that there is only ever
+ * one such free path per filesystem. Note that unconnected files (or other
+ * non-directories) are allowed, but not unconnected diretories.
+ */
+ struct semaphore s_nfsd_free_path_sem;
+};
+
+/*
+ * VFS helper functions..
+ */
+extern int vfs_create(struct inode *, struct dentry *, int);
+extern int vfs_mkdir(struct inode *, struct dentry *, int);
+extern int vfs_mknod(struct inode *, struct dentry *, int, dev_t);
+extern int vfs_symlink(struct inode *, struct dentry *, const char *);
+extern int vfs_link(struct dentry *, struct inode *, struct dentry *);
+extern int vfs_rmdir(struct inode *, struct dentry *);
+extern int vfs_unlink(struct inode *, struct dentry *);
+extern int vfs_rename(struct inode *, struct dentry *, struct inode *, struct dentry *);
+
+/*
+ * File types
+ */
+#define DT_UNKNOWN 0
+#define DT_FIFO 1
+#define DT_CHR 2
+#define DT_DIR 4
+#define DT_BLK 6
+#define DT_REG 8
+#define DT_LNK 10
+#define DT_SOCK 12
+#define DT_WHT 14
+
+/*
+ * This is the "filldir" function type, used by readdir() to let
+ * the kernel specify what kind of dirent layout it wants to have.
+ * This allows the kernel to read directories into kernel space or
+ * to have different dirent layouts depending on the binary type.
+ */
+typedef int (*filldir_t)(void *, const char *, int, loff_t, ino_t, unsigned);
+
+struct block_device_operations {
+ int (*open) (struct inode *, struct file *);
+ int (*release) (struct inode *, struct file *);
+ int (*ioctl) (struct inode *, struct file *, unsigned, unsigned long);
+ int (*check_media_change) (kdev_t);
+ int (*revalidate) (kdev_t);
+ struct module *owner;
+};
+
+/*
+ * NOTE:
+ * read, write, poll, fsync, readv, writev can be called
+ * without the big kernel lock held in all filesystems.
+ */
+struct file_operations {
+ struct module *owner;
+ loff_t (*llseek) (struct file *, loff_t, int);
+ ssize_t (*read) (struct file *, char *, size_t, loff_t *);
+ ssize_t (*write) (struct file *, const char *, size_t, loff_t *);
+ int (*readdir) (struct file *, void *, filldir_t);
+ unsigned int (*poll) (struct file *, struct poll_table_struct *);
+ int (*ioctl) (struct inode *, struct file *, unsigned int, unsigned long);
+ int (*mmap) (struct file *, struct vm_area_struct *);
+ int (*open) (struct inode *, struct file *);
+ int (*flush) (struct file *);
+ int (*release) (struct inode *, struct file *);
+ int (*fsync) (struct file *, struct dentry *, int datasync);
+ int (*fasync) (int, struct file *, int);
+ int (*lock) (struct file *, int, struct file_lock *);
+ ssize_t (*readv) (struct file *, const struct iovec *, unsigned long, loff_t *);
+ ssize_t (*writev) (struct file *, const struct iovec *, unsigned long, loff_t *);
+ ssize_t (*sendpage) (struct file *, struct page *, int, size_t, loff_t *, int);
+ unsigned long (*get_unmapped_area)(struct file *, unsigned long, unsigned long, unsigned long, unsigned long);
+};
+
+struct inode_operations {
+ int (*create) (struct inode *,struct dentry *,int);
+ struct dentry * (*lookup) (struct inode *,struct dentry *);
+ int (*link) (struct dentry *,struct inode *,struct dentry *);
+ int (*unlink) (struct inode *,struct dentry *);
+ int (*symlink) (struct inode *,struct dentry *,const char *);
+ int (*mkdir) (struct inode *,struct dentry *,int);
+ int (*rmdir) (struct inode *,struct dentry *);
+ int (*mknod) (struct inode *,struct dentry *,int,int);
+ int (*rename) (struct inode *, struct dentry *,
+ struct inode *, struct dentry *);
+ int (*readlink) (struct dentry *, char *,int);
+ int (*follow_link) (struct dentry *, struct nameidata *);
+ void (*truncate) (struct inode *);
+ int (*permission) (struct inode *, int);
+ int (*revalidate) (struct dentry *);
+ int (*setattr) (struct dentry *, struct iattr *);
+ int (*getattr) (struct dentry *, struct iattr *);
+ int (*setxattr) (struct dentry *, const char *, void *, size_t, int);
+ ssize_t (*getxattr) (struct dentry *, const char *, void *, size_t);
+ ssize_t (*listxattr) (struct dentry *, char *, size_t);
+ int (*removexattr) (struct dentry *, const char *);
+};
+
+struct seq_file;
+
+/*
+ * NOTE: write_inode, delete_inode, clear_inode, put_inode can be called
+ * without the big kernel lock held in all filesystems.
+ */
+struct super_operations {
+ void (*read_inode) (struct inode *);
+
+ /* reiserfs kludge. reiserfs needs 64 bits of information to
+ ** find an inode. We are using the read_inode2 call to get
+ ** that information. We don't like this, and are waiting on some
+ ** VFS changes for the real solution.
+ ** iget4 calls read_inode2, iff it is defined
+ */
+ void (*read_inode2) (struct inode *, void *) ;
+ void (*dirty_inode) (struct inode *);
+ void (*write_inode) (struct inode *, int);
+ void (*put_inode) (struct inode *);
+ void (*delete_inode) (struct inode *);
+ void (*put_super) (struct super_block *);
+ void (*write_super) (struct super_block *);
+ void (*write_super_lockfs) (struct super_block *);
+ void (*unlockfs) (struct super_block *);
+ int (*statfs) (struct super_block *, struct statfs *);
+ int (*remount_fs) (struct super_block *, int *, char *);
+ void (*clear_inode) (struct inode *);
+ void (*umount_begin) (struct super_block *);
+
+ /* Following are for knfsd to interact with "interesting" filesystems
+ * Currently just reiserfs, but possibly FAT and others later
+ *
+ * fh_to_dentry is given a filehandle fragement with length, and a type flag
+ * and must return a dentry for the referenced object or, if "parent" is
+ * set, a dentry for the parent of the object.
+ * If a dentry cannot be found, a "root" dentry should be created and
+ * flaged as DCACHE_NFSD_DISCONNECTED. nfsd_iget is an example implementation.
+ *
+ * dentry_to_fh is given a dentry and must generate the filesys specific
+ * part of the file handle. Available length is passed in *lenp and used
+ * length should be returned therein.
+ * If need_parent is set, then dentry_to_fh should encode sufficient information
+ * to find the (current) parent.
+ * dentry_to_fh should return a 1byte "type" which will be passed back in
+ * the fhtype arguement to fh_to_dentry. Type of 0 is reserved.
+ * If filesystem was exportable before the introduction of fh_to_dentry,
+ * types 1 and 2 should be used is that same way as the generic code.
+ * Type 255 means error.
+ *
+ * Lengths are in units of 4bytes, not bytes.
+ */
+ struct dentry * (*fh_to_dentry)(struct super_block *sb, __u32 *fh, int len, int fhtype, int parent);
+ int (*dentry_to_fh)(struct dentry *, __u32 *fh, int *lenp, int need_parent);
+ int (*show_options)(struct seq_file *, struct vfsmount *);
+};
+
+/* Inode state bits.. */
+#define I_DIRTY_SYNC 1 /* Not dirty enough for O_DATASYNC */
+#define I_DIRTY_DATASYNC 2 /* Data-related inode changes pending */
+#define I_DIRTY_PAGES 4 /* Data-related inode changes pending */
+#define I_LOCK 8
+#define I_FREEING 16
+#define I_CLEAR 32
+
+#define I_DIRTY (I_DIRTY_SYNC | I_DIRTY_DATASYNC | I_DIRTY_PAGES)
+
+extern void __mark_inode_dirty(struct inode *, int);
+static inline void mark_inode_dirty(struct inode *inode)
+{
+ __mark_inode_dirty(inode, I_DIRTY);
+}
+
+static inline void mark_inode_dirty_sync(struct inode *inode)
+{
+ __mark_inode_dirty(inode, I_DIRTY_SYNC);
+}
+
+static inline void mark_inode_dirty_pages(struct inode *inode)
+{
+ __mark_inode_dirty(inode, I_DIRTY_PAGES);
+}
+
+struct dquot_operations {
+ void (*initialize) (struct inode *, short);
+ void (*drop) (struct inode *);
+ int (*alloc_block) (struct inode *, unsigned long, char);
+ int (*alloc_inode) (const struct inode *, unsigned long);
+ void (*free_block) (struct inode *, unsigned long);
+ void (*free_inode) (const struct inode *, unsigned long);
+ int (*transfer) (struct inode *, struct iattr *);
+};
+
+struct file_system_type {
+ const char *name;
+ int fs_flags;
+ struct super_block *(*read_super) (struct super_block *, void *, int);
+ struct module *owner;
+ struct file_system_type * next;
+ struct list_head fs_supers;
+};
+
+#define DECLARE_FSTYPE(var,type,read,flags) \
+struct file_system_type var = { \
+ name: type, \
+ read_super: read, \
+ fs_flags: flags, \
+ owner: THIS_MODULE, \
+}
+
+#define DECLARE_FSTYPE_DEV(var,type,read) \
+ DECLARE_FSTYPE(var,type,read,FS_REQUIRES_DEV)
+
+/* Alas, no aliases. Too much hassle with bringing module.h everywhere */
+#define fops_get(fops) \
+ (((fops) && (fops)->owner) \
+ ? ( try_inc_mod_count((fops)->owner) ? (fops) : NULL ) \
+ : (fops))
+
+#define fops_put(fops) \
+do { \
+ if ((fops) && (fops)->owner) \
+ __MOD_DEC_USE_COUNT((fops)->owner); \
+} while(0)
+
+extern int register_filesystem(struct file_system_type *);
+extern int unregister_filesystem(struct file_system_type *);
+extern struct vfsmount *kern_mount(struct file_system_type *);
+extern int may_umount(struct vfsmount *);
+extern long do_mount(char *, char *, char *, unsigned long, void *);
+
+#define kern_umount mntput
+
+extern int vfs_statfs(struct super_block *, struct statfs *);
+
+/* Return value for VFS lock functions - tells locks.c to lock conventionally
+ * REALLY kosha for root NFS and nfs_lock
+ */
+#define LOCK_USE_CLNT 1
+
+#define FLOCK_VERIFY_READ 1
+#define FLOCK_VERIFY_WRITE 2
+
+extern int locks_mandatory_locked(struct inode *);
+extern int locks_mandatory_area(int, struct inode *, struct file *, loff_t, size_t);
+
+/*
+ * Candidates for mandatory locking have the setgid bit set
+ * but no group execute bit - an otherwise meaningless combination.
+ */
+#define MANDATORY_LOCK(inode) \
+ (IS_MANDLOCK(inode) && ((inode)->i_mode & (S_ISGID | S_IXGRP)) == S_ISGID)
+
+static inline int locks_verify_locked(struct inode *inode)
+{
+ if (MANDATORY_LOCK(inode))
+ return locks_mandatory_locked(inode);
+ return 0;
+}
+
+static inline int locks_verify_area(int read_write, struct inode *inode,
+ struct file *filp, loff_t offset,
+ size_t count)
+{
+ if (inode->i_flock && MANDATORY_LOCK(inode))
+ return locks_mandatory_area(read_write, inode, filp, offset, count);
+ return 0;
+}
+
+static inline int locks_verify_truncate(struct inode *inode,
+ struct file *filp,
+ loff_t size)
+{
+ if (inode->i_flock && MANDATORY_LOCK(inode))
+ return locks_mandatory_area(
+ FLOCK_VERIFY_WRITE, inode, filp,
+ size < inode->i_size ? size : inode->i_size,
+ (size < inode->i_size ? inode->i_size - size
+ : size - inode->i_size)
+ );
+ return 0;
+}
+
+static inline int get_lease(struct inode *inode, unsigned int mode)
+{
+ if (inode->i_flock)
+ return __get_lease(inode, mode);
+ return 0;
+}
+
+/* fs/open.c */
+
+asmlinkage long sys_open(const char *, int, int);
+asmlinkage long sys_close(unsigned int); /* yes, it's really unsigned */
+extern int do_truncate(struct dentry *, loff_t start);
+
+extern struct file *filp_open(const char *, int, int);
+extern struct file * dentry_open(struct dentry *, struct vfsmount *, int);
+extern int filp_close(struct file *, fl_owner_t id);
+extern char * getname(const char *);
+
+/* fs/dcache.c */
+extern void vfs_caches_init(unsigned long);
+
+#define __getname() kmem_cache_alloc(names_cachep, SLAB_KERNEL)
+#define putname(name) kmem_cache_free(names_cachep, (void *)(name))
+
+enum {BDEV_FILE, BDEV_SWAP, BDEV_FS, BDEV_RAW};
+extern int register_blkdev(unsigned int, const char *, struct block_device_operations *);
+extern int unregister_blkdev(unsigned int, const char *);
+extern struct block_device *bdget(dev_t);
+extern int bd_acquire(struct inode *inode);
+extern void bd_forget(struct inode *inode);
+extern void bdput(struct block_device *);
+extern struct char_device *cdget(dev_t);
+extern void cdput(struct char_device *);
+extern int blkdev_open(struct inode *, struct file *);
+extern int blkdev_close(struct inode *, struct file *);
+extern struct file_operations def_blk_fops;
+extern struct address_space_operations def_blk_aops;
+extern struct file_operations def_fifo_fops;
+extern int ioctl_by_bdev(struct block_device *, unsigned, unsigned long);
+extern int blkdev_get(struct block_device *, mode_t, unsigned, int);
+extern int blkdev_put(struct block_device *, int);
+
+/* fs/devices.c */
+extern const struct block_device_operations *get_blkfops(unsigned int);
+extern int register_chrdev(unsigned int, const char *, struct file_operations *);
+extern int unregister_chrdev(unsigned int, const char *);
+extern int chrdev_open(struct inode *, struct file *);
+extern const char * bdevname(kdev_t);
+extern const char * cdevname(kdev_t);
+extern const char * kdevname(kdev_t);
+extern void init_special_inode(struct inode *, umode_t, int);
+
+/* Invalid inode operations -- fs/bad_inode.c */
+extern void make_bad_inode(struct inode *);
+extern int is_bad_inode(struct inode *);
+
+extern struct file_operations read_fifo_fops;
+extern struct file_operations write_fifo_fops;
+extern struct file_operations rdwr_fifo_fops;
+extern struct file_operations read_pipe_fops;
+extern struct file_operations write_pipe_fops;
+extern struct file_operations rdwr_pipe_fops;
+
+extern int fs_may_remount_ro(struct super_block *);
+
+extern int FASTCALL(try_to_free_buffers(struct page *, unsigned int));
+extern void refile_buffer(struct buffer_head * buf);
+extern void create_empty_buffers(struct page *, kdev_t, unsigned long);
+extern void end_buffer_io_sync(struct buffer_head *bh, int uptodate);
+
+/* reiserfs_writepage needs this */
+extern void set_buffer_async_io(struct buffer_head *bh) ;
+
+#define BUF_CLEAN 0
+#define BUF_LOCKED 1 /* Buffers scheduled for write */
+#define BUF_DIRTY 2 /* Dirty buffers, not yet scheduled for write */
+#define NR_LIST 3
+
+static inline void get_bh(struct buffer_head * bh)
+{
+ atomic_inc(&(bh)->b_count);
+}
+
+static inline void put_bh(struct buffer_head *bh)
+{
+ smp_mb__before_atomic_dec();
+ atomic_dec(&bh->b_count);
+}
+
+/*
+ * This is called by bh->b_end_io() handlers when I/O has completed.
+ */
+static inline void mark_buffer_uptodate(struct buffer_head * bh, int on)
+{
+ if (on)
+ set_bit(BH_Uptodate, &bh->b_state);
+ else
+ clear_bit(BH_Uptodate, &bh->b_state);
+}
+
+#define atomic_set_buffer_clean(bh) test_and_clear_bit(BH_Dirty, &(bh)->b_state)
+
+static inline void __mark_buffer_clean(struct buffer_head *bh)
+{
+ refile_buffer(bh);
+}
+
+static inline void mark_buffer_clean(struct buffer_head * bh)
+{
+ if (atomic_set_buffer_clean(bh))
+ __mark_buffer_clean(bh);
+}
+
+extern void FASTCALL(__mark_dirty(struct buffer_head *bh));
+extern void FASTCALL(__mark_buffer_dirty(struct buffer_head *bh));
+extern void FASTCALL(mark_buffer_dirty(struct buffer_head *bh));
+extern void FASTCALL(buffer_insert_inode_queue(struct buffer_head *, struct inode *));
+extern void FASTCALL(buffer_insert_inode_data_queue(struct buffer_head *, struct inode *));
+
+static inline int atomic_set_buffer_dirty(struct buffer_head *bh)
+{
+ return test_and_set_bit(BH_Dirty, &bh->b_state);
+}
+
+static inline void mark_buffer_async(struct buffer_head * bh, int on)
+{
+ if (on)
+ set_bit(BH_Async, &bh->b_state);
+ else
+ clear_bit(BH_Async, &bh->b_state);
+}
+
+/*
+ * If an error happens during the make_request, this function
+ * has to be recalled. It marks the buffer as clean and not
+ * uptodate, and it notifys the upper layer about the end
+ * of the I/O.
+ */
+static inline void buffer_IO_error(struct buffer_head * bh)
+{
+ mark_buffer_clean(bh);
+ /*
+ * b_end_io has to clear the BH_Uptodate bitflag in the error case!
+ */
+ bh->b_end_io(bh, 0);
+}
+
+static inline void mark_buffer_dirty_inode(struct buffer_head *bh, struct inode *inode)
+{
+ mark_buffer_dirty(bh);
+ buffer_insert_inode_queue(bh, inode);
+}
+
+extern void set_buffer_flushtime(struct buffer_head *);
+extern void balance_dirty(void);
+extern int check_disk_change(kdev_t);
+extern int invalidate_inodes(struct super_block *);
+extern int invalidate_device(kdev_t, int);
+extern void invalidate_inode_pages(struct inode *);
+extern void invalidate_inode_pages2(struct address_space *);
+extern void invalidate_inode_buffers(struct inode *);
+#define invalidate_buffers(dev) __invalidate_buffers((dev), 0)
+#define destroy_buffers(dev) __invalidate_buffers((dev), 1)
+extern void invalidate_bdev(struct block_device *, int);
+extern void __invalidate_buffers(kdev_t dev, int);
+extern void sync_inodes(kdev_t);
+extern void sync_unlocked_inodes(void);
+extern void write_inode_now(struct inode *, int);
+extern int sync_buffers(kdev_t, int);
+extern void sync_dev(kdev_t);
+extern int fsync_dev(kdev_t);
+extern int fsync_super(struct super_block *);
+extern int fsync_no_super(kdev_t);
+extern void sync_inodes_sb(struct super_block *);
+extern int fsync_buffers_list(struct list_head *);
+static inline int fsync_inode_buffers(struct inode *inode)
+{
+ return fsync_buffers_list(&inode->i_dirty_buffers);
+}
+static inline int fsync_inode_data_buffers(struct inode *inode)
+{
+ return fsync_buffers_list(&inode->i_dirty_data_buffers);
+}
+extern int inode_has_buffers(struct inode *);
+extern int filemap_fdatasync(struct address_space *);
+extern int filemap_fdatawait(struct address_space *);
+extern void sync_supers(kdev_t);
+extern int bmap(struct inode *, int);
+extern int notify_change(struct dentry *, struct iattr *);
+extern int permission(struct inode *, int);
+extern int vfs_permission(struct inode *, int);
+extern int get_write_access(struct inode *);
+extern int deny_write_access(struct file *);
+static inline void put_write_access(struct inode * inode)
+{
+ atomic_dec(&inode->i_writecount);
+}
+static inline void allow_write_access(struct file *file)
+{
+ if (file)
+ atomic_inc(&file->f_dentry->d_inode->i_writecount);
+}
+extern int do_pipe(int *);
+
+extern int open_namei(const char *, int, int, struct nameidata *);
+
+extern int kernel_read(struct file *, unsigned long, char *, unsigned long);
+extern struct file * open_exec(const char *);
+
+/* fs/dcache.c -- generic fs support functions */
+extern int is_subdir(struct dentry *, struct dentry *);
+extern ino_t find_inode_number(struct dentry *, struct qstr *);
+
+/*
+ * Kernel pointers have redundant information, so we can use a
+ * scheme where we can return either an error code or a dentry
+ * pointer with the same return value.
+ *
+ * This should be a per-architecture thing, to allow different
+ * error and pointer decisions.
+ */
+static inline void *ERR_PTR(long error)
+{
+ return (void *) error;
+}
+
+static inline long PTR_ERR(const void *ptr)
+{
+ return (long) ptr;
+}
+
+static inline long IS_ERR(const void *ptr)
+{
+ return (unsigned long)ptr > (unsigned long)-1000L;
+}
+
+/*
+ * The bitmask for a lookup event:
+ * - follow links at the end
+ * - require a directory
+ * - ending slashes ok even for nonexistent files
+ * - internal "there are more path compnents" flag
+ */
+#define LOOKUP_FOLLOW (1)
+#define LOOKUP_DIRECTORY (2)
+#define LOOKUP_CONTINUE (4)
+#define LOOKUP_POSITIVE (8)
+#define LOOKUP_PARENT (16)
+#define LOOKUP_NOALT (32)
+/*
+ * Type of the last component on LOOKUP_PARENT
+ */
+enum {LAST_NORM, LAST_ROOT, LAST_DOT, LAST_DOTDOT, LAST_BIND};
+
+/*
+ * "descriptor" for what we're up to with a read for sendfile().
+ * This allows us to use the same read code yet
+ * have multiple different users of the data that
+ * we read from a file.
+ *
+ * The simplest case just copies the data to user
+ * mode.
+ */
+typedef struct {
+ size_t written;
+ size_t count;
+ char * buf;
+ int error;
+} read_descriptor_t;
+
+typedef int (*read_actor_t)(read_descriptor_t *, struct page *, unsigned long, unsigned long);
+
+/* needed for stackable file system support */
+extern loff_t default_llseek(struct file *file, loff_t offset, int origin);
+
+extern int FASTCALL(__user_walk(const char *, unsigned, struct nameidata *));
+extern int FASTCALL(path_init(const char *, unsigned, struct nameidata *));
+extern int FASTCALL(path_walk(const char *, struct nameidata *));
+extern int FASTCALL(path_lookup(const char *, unsigned, struct nameidata *));
+extern int FASTCALL(link_path_walk(const char *, struct nameidata *));
+extern void path_release(struct nameidata *);
+extern int follow_down(struct vfsmount **, struct dentry **);
+extern int follow_up(struct vfsmount **, struct dentry **);
+extern struct dentry * lookup_one_len(const char *, struct dentry *, int);
+extern struct dentry * lookup_hash(struct qstr *, struct dentry *);
+#define user_path_walk(name,nd) __user_walk(name, LOOKUP_FOLLOW|LOOKUP_POSITIVE, nd)
+#define user_path_walk_link(name,nd) __user_walk(name, LOOKUP_POSITIVE, nd)
+
+extern void iput(struct inode *);
+extern void force_delete(struct inode *);
+extern struct inode * igrab(struct inode *);
+extern ino_t iunique(struct super_block *, ino_t);
+
+typedef int (*find_inode_t)(struct inode *, unsigned long, void *);
+extern struct inode * iget4(struct super_block *, unsigned long, find_inode_t, void *);
+static inline struct inode *iget(struct super_block *sb, unsigned long ino)
+{
+ return iget4(sb, ino, NULL, NULL);
+}
+
+extern void clear_inode(struct inode *);
+extern struct inode * get_empty_inode(void);
+
+static inline struct inode * new_inode(struct super_block *sb)
+{
+ struct inode *inode = get_empty_inode();
+ if (inode) {
+ inode->i_sb = sb;
+ inode->i_dev = sb->s_dev;
+ inode->i_blkbits = sb->s_blocksize_bits;
+ }
+ return inode;
+}
+extern void remove_suid(struct inode *inode);
+
+extern void insert_inode_hash(struct inode *);
+extern void remove_inode_hash(struct inode *);
+extern struct file * get_empty_filp(void);
+extern void file_move(struct file *f, struct list_head *list);
+extern struct buffer_head * get_hash_table(kdev_t, int, int);
+extern struct buffer_head * getblk(kdev_t, int, int);
+extern void ll_rw_block(int, int, struct buffer_head * bh[]);
+extern void submit_bh(int, struct buffer_head *);
+extern int is_read_only(kdev_t);
+extern void __brelse(struct buffer_head *);
+static inline void brelse(struct buffer_head *buf)
+{
+ if (buf)
+ __brelse(buf);
+}
+extern void __bforget(struct buffer_head *);
+static inline void bforget(struct buffer_head *buf)
+{
+ if (buf)
+ __bforget(buf);
+}
+extern int set_blocksize(kdev_t, int);
+extern int sb_set_blocksize(struct super_block *, int);
+extern int sb_min_blocksize(struct super_block *, int);
+extern struct buffer_head * bread(kdev_t, int, int);
+static inline struct buffer_head * sb_bread(struct super_block *sb, int block)
+{
+ return bread(sb->s_dev, block, sb->s_blocksize);
+}
+static inline struct buffer_head * sb_getblk(struct super_block *sb, int block)
+{
+ return getblk(sb->s_dev, block, sb->s_blocksize);
+}
+static inline struct buffer_head * sb_get_hash_table(struct super_block *sb, int block)
+{
+ return get_hash_table(sb->s_dev, block, sb->s_blocksize);
+}
+extern void wakeup_bdflush(void);
+extern void put_unused_buffer_head(struct buffer_head * bh);
+extern struct buffer_head * get_unused_buffer_head(int async);
+
+extern int brw_page(int, struct page *, kdev_t, int [], int);
+
+typedef int (get_block_t)(struct inode*,long,struct buffer_head*,int);
+
+/* Generic buffer handling for block filesystems.. */
+extern int try_to_release_page(struct page * page, int gfp_mask);
+extern int discard_bh_page(struct page *, unsigned long, int);
+#define block_flushpage(page, offset) discard_bh_page(page, offset, 1)
+#define block_invalidate_page(page) discard_bh_page(page, 0, 0)
+extern int block_symlink(struct inode *, const char *, int);
+extern int block_write_full_page(struct page*, get_block_t*);
+extern int block_read_full_page(struct page*, get_block_t*);
+extern int block_prepare_write(struct page*, unsigned, unsigned, get_block_t*);
+extern int cont_prepare_write(struct page*, unsigned, unsigned, get_block_t*,
+ unsigned long *);
+extern int generic_cont_expand(struct inode *inode, loff_t size) ;
+extern int block_commit_write(struct page *page, unsigned from, unsigned to);
+extern int block_sync_page(struct page *);
+
+int generic_block_bmap(struct address_space *, long, get_block_t *);
+int generic_commit_write(struct file *, struct page *, unsigned, unsigned);
+int block_truncate_page(struct address_space *, loff_t, get_block_t *);
+extern int generic_direct_IO(int, struct inode *, struct kiobuf *, unsigned long, int, get_block_t *);
+extern int waitfor_one_page(struct page *);
+extern int writeout_one_page(struct page *);
+
+extern int generic_file_mmap(struct file *, struct vm_area_struct *);
+extern int file_read_actor(read_descriptor_t * desc, struct page *page, unsigned long offset, unsigned long size);
+extern ssize_t generic_file_read(struct file *, char *, size_t, loff_t *);
+extern ssize_t generic_file_write(struct file *, const char *, size_t, loff_t *);
+extern void do_generic_file_read(struct file *, loff_t *, read_descriptor_t *, read_actor_t);
+extern loff_t no_llseek(struct file *file, loff_t offset, int origin);
+extern loff_t generic_file_llseek(struct file *file, loff_t offset, int origin);
+extern ssize_t generic_read_dir(struct file *, char *, size_t, loff_t *);
+extern int generic_file_open(struct inode * inode, struct file * filp);
+
+extern struct file_operations generic_ro_fops;
+
+extern int vfs_readlink(struct dentry *, char *, int, const char *);
+extern int vfs_follow_link(struct nameidata *, const char *);
+extern int page_readlink(struct dentry *, char *, int);
+extern int page_follow_link(struct dentry *, struct nameidata *);
+extern struct inode_operations page_symlink_inode_operations;
+
+extern int vfs_readdir(struct file *, filldir_t, void *);
+extern int dcache_dir_open(struct inode *, struct file *);
+extern int dcache_dir_close(struct inode *, struct file *);
+extern loff_t dcache_dir_lseek(struct file *, loff_t, int);
+extern int dcache_dir_fsync(struct file *, struct dentry *, int);
+extern int dcache_readdir(struct file *, void *, filldir_t);
+extern struct file_operations dcache_dir_ops;
+
+extern struct file_system_type *get_fs_type(const char *name);
+extern struct super_block *get_super(kdev_t);
+extern void drop_super(struct super_block *sb);
+static inline int is_mounted(kdev_t dev)
+{
+ struct super_block *sb = get_super(dev);
+ if (sb) {
+ drop_super(sb);
+ return 1;
+ }
+ return 0;
+}
+unsigned long generate_cluster(kdev_t, int b[], int);
+unsigned long generate_cluster_swab32(kdev_t, int b[], int);
+extern kdev_t ROOT_DEV;
+extern char root_device_name[];
+
+
+extern void show_buffers(void);
+
+#ifdef CONFIG_BLK_DEV_INITRD
+extern unsigned int real_root_dev;
+#endif
+
+extern ssize_t char_read(struct file *, char *, size_t, loff_t *);
+extern ssize_t block_read(struct file *, char *, size_t, loff_t *);
+extern int read_ahead[];
+
+extern ssize_t char_write(struct file *, const char *, size_t, loff_t *);
+extern ssize_t block_write(struct file *, const char *, size_t, loff_t *);
+
+extern int file_fsync(struct file *, struct dentry *, int);
+extern int generic_buffer_fdatasync(struct inode *inode, unsigned long start_idx, unsigned long end_idx);
+extern int generic_osync_inode(struct inode *, int);
+#define OSYNC_METADATA (1<<0)
+#define OSYNC_DATA (1<<1)
+#define OSYNC_INODE (1<<2)
+
+extern int inode_change_ok(struct inode *, struct iattr *);
+extern int inode_setattr(struct inode *, struct iattr *);
+
+/*
+ * Common dentry functions for inclusion in the VFS
+ * or in other stackable file systems. Some of these
+ * functions were in linux/fs/ C (VFS) files.
+ *
+ */
+
+/*
+ * Locking the parent is needed to:
+ * - serialize directory operations
+ * - make sure the parent doesn't change from
+ * under us in the middle of an operation.
+ *
+ * NOTE! Right now we'd rather use a "struct inode"
+ * for this, but as I expect things to move toward
+ * using dentries instead for most things it is
+ * probably better to start with the conceptually
+ * better interface of relying on a path of dentries.
+ */
+static inline struct dentry *lock_parent(struct dentry *dentry)
+{
+ struct dentry *dir = dget(dentry->d_parent);
+
+ down(&dir->d_inode->i_sem);
+ return dir;
+}
+
+static inline struct dentry *get_parent(struct dentry *dentry)
+{
+ return dget(dentry->d_parent);
+}
+
+static inline void unlock_dir(struct dentry *dir)
+{
+ up(&dir->d_inode->i_sem);
+ dput(dir);
+}
+
+/*
+ * Whee.. Deadlock country. Happily there are only two VFS
+ * operations that does this..
+ */
+static inline void double_down(struct semaphore *s1, struct semaphore *s2)
+{
+ if (s1 != s2) {
+ if ((unsigned long) s1 < (unsigned long) s2) {
+ struct semaphore *tmp = s2;
+ s2 = s1; s1 = tmp;
+ }
+ down(s1);
+ }
+ down(s2);
+}
+
+/*
+ * Ewwwwwwww... _triple_ lock. We are guaranteed that the 3rd argument is
+ * not equal to 1st and not equal to 2nd - the first case (target is parent of
+ * source) would be already caught, the second is plain impossible (target is
+ * its own parent and that case would be caught even earlier). Very messy.
+ * I _think_ that it works, but no warranties - please, look it through.
+ * Pox on bloody lusers who mandated overwriting rename() for directories...
+ */
+
+static inline void triple_down(struct semaphore *s1,
+ struct semaphore *s2,
+ struct semaphore *s3)
+{
+ if (s1 != s2) {
+ if ((unsigned long) s1 < (unsigned long) s2) {
+ if ((unsigned long) s1 < (unsigned long) s3) {
+ struct semaphore *tmp = s3;
+ s3 = s1; s1 = tmp;
+ }
+ if ((unsigned long) s1 < (unsigned long) s2) {
+ struct semaphore *tmp = s2;
+ s2 = s1; s1 = tmp;
+ }
+ } else {
+ if ((unsigned long) s1 < (unsigned long) s3) {
+ struct semaphore *tmp = s3;
+ s3 = s1; s1 = tmp;
+ }
+ if ((unsigned long) s2 < (unsigned long) s3) {
+ struct semaphore *tmp = s3;
+ s3 = s2; s2 = tmp;
+ }
+ }
+ down(s1);
+ } else if ((unsigned long) s2 < (unsigned long) s3) {
+ struct semaphore *tmp = s3;
+ s3 = s2; s2 = tmp;
+ }
+ down(s2);
+ down(s3);
+}
+
+static inline void double_up(struct semaphore *s1, struct semaphore *s2)
+{
+ up(s1);
+ if (s1 != s2)
+ up(s2);
+}
+
+static inline void triple_up(struct semaphore *s1,
+ struct semaphore *s2,
+ struct semaphore *s3)
+{
+ up(s1);
+ if (s1 != s2)
+ up(s2);
+ up(s3);
+}
+
+static inline void double_lock(struct dentry *d1, struct dentry *d2)
+{
+ double_down(&d1->d_inode->i_sem, &d2->d_inode->i_sem);
+}
+
+static inline void double_unlock(struct dentry *d1, struct dentry *d2)
+{
+ double_up(&d1->d_inode->i_sem,&d2->d_inode->i_sem);
+ dput(d1);
+ dput(d2);
+}
+
+#endif /* __KERNEL__ */
+
+#endif /* _LINUX_FS_H */
diff -Nurb src/linux/linux.orig/include/linux/squashfs_fs.h src/linux/linux/include/linux/squashfs_fs.h
--- src/linux/linux.orig/include/linux/squashfs_fs.h 1969-12-31 19:00:00.000000000 -0500
+++ src/linux/linux/include/linux/squashfs_fs.h 2004-05-25 21:13:03.000000000 -0400
@@ -0,0 +1,474 @@
+#ifndef SQUASHFS_FS
+#define SQUASHFS_FS
+/*
+ * Squashfs
+ *
+ * Copyright (c) 2002, 2003, 2004 Phillip Lougher <plougher@users.sourceforge.net>
+ *
+ * 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,
+ * 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, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ * squashfs_fs.h
+ */
+
+#define SQUASHFS_MAJOR 2
+#define SQUASHFS_MINOR 0
+#define SQUASHFS_MAGIC 0x73717368
+#define SQUASHFS_MAGIC_SWAP 0x68737173
+#define SQUASHFS_START 0
+
+/* size of metadata (inode and directory) blocks */
+#define SQUASHFS_METADATA_SIZE 8192
+#define SQUASHFS_METADATA_LOG 13
+
+/* default size of data blocks */
+#define SQUASHFS_FILE_SIZE 65536
+#define SQUASHFS_FILE_LOG 16
+
+#define SQUASHFS_FILE_MAX_SIZE 65536
+
+/* Max number of uids and gids */
+#define SQUASHFS_UIDS 256
+#define SQUASHFS_GUIDS 255
+
+/* Max length of filename (not 255) */
+#define SQUASHFS_NAME_LEN 256
+
+#define SQUASHFS_INVALID ((long long) 0xffffffffffff)
+#define SQUASHFS_INVALID_BLK ((long long) 0xffffffff)
+#define SQUASHFS_USED_BLK ((long long) 0xfffffffe)
+
+/* Filesystem flags */
+#define SQUASHFS_NOI 0
+#define SQUASHFS_NOD 1
+#define SQUASHFS_CHECK 2
+#define SQUASHFS_NOF 3
+#define SQUASHFS_NO_FRAG 4
+#define SQUASHFS_ALWAYS_FRAG 5
+#define SQUASHFS_DUPLICATE 6
+#define SQUASHFS_BIT(flag, bit) ((flag >> bit) & 1)
+#define SQUASHFS_UNCOMPRESSED_INODES(flags) SQUASHFS_BIT(flags, SQUASHFS_NOI)
+#define SQUASHFS_UNCOMPRESSED_DATA(flags) SQUASHFS_BIT(flags, SQUASHFS_NOD)
+#define SQUASHFS_UNCOMPRESSED_FRAGMENTS(flags) SQUASHFS_BIT(flags, SQUASHFS_NOF)
+#define SQUASHFS_NO_FRAGMENTS(flags) SQUASHFS_BIT(flags, SQUASHFS_NO_FRAG)
+#define SQUASHFS_ALWAYS_FRAGMENTS(flags) SQUASHFS_BIT(flags, SQUASHFS_ALWAYS_FRAG)
+#define SQUASHFS_DUPLICATES(flags) SQUASHFS_BIT(flags, SQUASHFS_DUPLICATE)
+#define SQUASHFS_CHECK_DATA(flags) SQUASHFS_BIT(flags, SQUASHFS_CHECK)
+#define SQUASHFS_MKFLAGS(noi, nod, check_data, nof, no_frag, always_frag, duplicate_checking) (noi | (nod << 1) | (check_data << 2) | (nof << 3) | (no_frag << 4) | (always_frag << 5) | (duplicate_checking << 6))
+
+/* Max number of types and file types */
+#define SQUASHFS_DIR_TYPE 1
+#define SQUASHFS_FILE_TYPE 2
+#define SQUASHFS_SYMLINK_TYPE 3
+#define SQUASHFS_BLKDEV_TYPE 4
+#define SQUASHFS_CHRDEV_TYPE 5
+#define SQUASHFS_FIFO_TYPE 6
+#define SQUASHFS_SOCKET_TYPE 7
+
+/* 1.0 filesystem type definitions */
+#define SQUASHFS_TYPES 5
+#define SQUASHFS_IPC_TYPE 0
+
+/* Flag whether block is compressed or uncompressed, bit is set if block is uncompressed */
+#define SQUASHFS_COMPRESSED_BIT (1 << 15)
+#define SQUASHFS_COMPRESSED_SIZE(B) (((B) & ~SQUASHFS_COMPRESSED_BIT) ? \
+ (B) & ~SQUASHFS_COMPRESSED_BIT : SQUASHFS_COMPRESSED_BIT)
+
+#define SQUASHFS_COMPRESSED(B) (!((B) & SQUASHFS_COMPRESSED_BIT))
+
+#define SQUASHFS_COMPRESSED_BIT_BLOCK (1 << 24)
+#define SQUASHFS_COMPRESSED_SIZE_BLOCK(B) (((B) & ~SQUASHFS_COMPRESSED_BIT_BLOCK) ? \
+ (B) & ~SQUASHFS_COMPRESSED_BIT_BLOCK : SQUASHFS_COMPRESSED_BIT_BLOCK)
+
+#define SQUASHFS_COMPRESSED_BLOCK(B) (!((B) & SQUASHFS_COMPRESSED_BIT_BLOCK))
+
+/*
+ * Inode number ops. Inodes consist of a compressed block number, and an uncompressed
+ * offset within that block
+ */
+#define SQUASHFS_INODE_BLK(a) ((unsigned int) ((a) >> 16))
+#define SQUASHFS_INODE_OFFSET(a) ((unsigned int) ((a) & 0xffff))
+#define SQUASHFS_MKINODE(A, B) ((squashfs_inode)(((squashfs_inode) (A) << 16)\
+ + (B)))
+
+/* Compute 32 bit VFS inode number from squashfs inode number */
+#define SQUASHFS_MK_VFS_INODE(a, b) ((unsigned int) (((a) << 8) + ((b) >> 2) + 1))
+
+/* Translate between VFS mode and squashfs mode */
+#define SQUASHFS_MODE(a) ((a) & 0xfff)
+
+/* fragment and fragment table defines */
+typedef unsigned int squashfs_fragment_index;
+#define SQUASHFS_FRAGMENT_BYTES(A) (A * sizeof(squashfs_fragment_entry))
+#define SQUASHFS_FRAGMENT_INDEX(A) (SQUASHFS_FRAGMENT_BYTES(A) / SQUASHFS_METADATA_SIZE)
+#define SQUASHFS_FRAGMENT_INDEX_OFFSET(A) (SQUASHFS_FRAGMENT_BYTES(A) % SQUASHFS_METADATA_SIZE)
+#define SQUASHFS_FRAGMENT_INDEXES(A) ((SQUASHFS_FRAGMENT_BYTES(A) + SQUASHFS_METADATA_SIZE - 1) / SQUASHFS_METADATA_SIZE)
+#define SQUASHFS_FRAGMENT_INDEX_BYTES(A) (SQUASHFS_FRAGMENT_INDEXES(A) * sizeof(squashfs_fragment_index))
+#define SQUASHFS_CACHED_FRAGMENTS 3
+
+/* cached data constants for filesystem */
+#define SQUASHFS_CACHED_BLKS 8
+
+#define SQUASHFS_MAX_FILE_SIZE_LOG 32
+#define SQUASHFS_MAX_FILE_SIZE ((long long) 1 << (SQUASHFS_MAX_FILE_SIZE_LOG - 1))
+
+#define SQUASHFS_MARKER_BYTE 0xff
+
+/*
+ * definitions for structures on disk
+ */
+
+typedef unsigned int squashfs_block;
+typedef long long squashfs_inode;
+
+typedef unsigned int squashfs_uid;
+
+typedef struct squashfs_super_block {
+ unsigned int s_magic;
+ unsigned int inodes;
+ unsigned int bytes_used;
+ unsigned int uid_start;
+ unsigned int guid_start;
+ unsigned int inode_table_start;
+ unsigned int directory_table_start;
+ unsigned int s_major:16;
+ unsigned int s_minor:16;
+ unsigned int block_size_1:16;
+ unsigned int block_log:16;
+ unsigned int flags:8;
+ unsigned int no_uids:8;
+ unsigned int no_guids:8;
+ time_t mkfs_time /* time of filesystem creation */;
+ squashfs_inode root_inode;
+ unsigned int block_size;
+ unsigned int fragments;
+ unsigned int fragment_table_start;
+} __attribute__ ((packed)) squashfs_super_block;
+
+typedef struct {
+ unsigned int inode_type:4;
+ unsigned int mode:12; /* protection */
+ unsigned int uid:8; /* index into uid table */
+ unsigned int guid:8; /* index into guid table */
+} __attribute__ ((packed)) squashfs_base_inode_header;
+
+typedef squashfs_base_inode_header squashfs_ipc_inode_header;
+
+typedef struct {
+ unsigned int inode_type:4;
+ unsigned int mode:12; /* protection */
+ unsigned int uid:8; /* index into uid table */
+ unsigned int guid:8; /* index into guid table */
+ unsigned short rdev;
+} __attribute__ ((packed)) squashfs_dev_inode_header;
+
+typedef struct {
+ unsigned int inode_type:4;
+ unsigned int mode:12; /* protection */
+ unsigned int uid:8; /* index into uid table */
+ unsigned int guid:8; /* index into guid table */
+ unsigned short symlink_size;
+ char symlink[0];
+} __attribute__ ((packed)) squashfs_symlink_inode_header;
+
+typedef struct {
+ unsigned int inode_type:4;
+ unsigned int mode:12; /* protection */
+ unsigned int uid:8; /* index into uid table */
+ unsigned int guid:8; /* index into guid table */
+ time_t mtime;
+ squashfs_block start_block;
+ unsigned int fragment;
+ unsigned int offset;
+ unsigned int file_size:SQUASHFS_MAX_FILE_SIZE_LOG;
+ unsigned short block_list[0];
+} __attribute__ ((packed)) squashfs_reg_inode_header;
+
+typedef struct {
+ unsigned int inode_type:4;
+ unsigned int mode:12; /* protection */
+ unsigned int uid:8; /* index into uid table */
+ unsigned int guid:8; /* index into guid table */
+ unsigned int file_size:19;
+ unsigned int offset:13;
+ time_t mtime;
+ unsigned int start_block:24;
+} __attribute__ ((packed)) squashfs_dir_inode_header;
+
+typedef union {
+ squashfs_base_inode_header base;
+ squashfs_dev_inode_header dev;
+ squashfs_symlink_inode_header symlink;
+ squashfs_reg_inode_header reg;
+ squashfs_dir_inode_header dir;
+ squashfs_ipc_inode_header ipc;
+} squashfs_inode_header;
+
+typedef struct {
+ unsigned int offset:13;
+ unsigned int type:3;
+ unsigned int size:8;
+ char name[0];
+} __attribute__ ((packed)) squashfs_dir_entry;
+
+typedef struct {
+ unsigned int count:8;
+ unsigned int start_block:24;
+} __attribute__ ((packed)) squashfs_dir_header;
+
+
+typedef struct {
+ unsigned int start_block;
+ unsigned int size;
+} __attribute__ ((packed)) squashfs_fragment_entry;
+
+extern int squashfs_uncompress_block(void *d, int dstlen, void *s, int srclen);
+extern int squashfs_uncompress_init(void);
+extern int squashfs_uncompress_exit(void);
+
+/*
+ * macros to convert each packed bitfield structure from little endian to big
+ * endian and vice versa. These are needed when creating or using a filesystem on a
+ * machine with different byte ordering to the target architecture.
+ *
+ */
+
+#define SQUASHFS_SWAP_SUPER_BLOCK(s, d) {\
+ SQUASHFS_MEMSET(s, d, sizeof(squashfs_super_block));\
+ SQUASHFS_SWAP((s)->s_magic, d, 0, 32);\
+ SQUASHFS_SWAP((s)->inodes, d, 32, 32);\
+ SQUASHFS_SWAP((s)->bytes_used, d, 64, 32);\
+ SQUASHFS_SWAP((s)->uid_start, d, 96, 32);\
+ SQUASHFS_SWAP((s)->guid_start, d, 128, 32);\
+ SQUASHFS_SWAP((s)->inode_table_start, d, 160, 32);\
+ SQUASHFS_SWAP((s)->directory_table_start, d, 192, 32);\
+ SQUASHFS_SWAP((s)->s_major, d, 224, 16);\
+ SQUASHFS_SWAP((s)->s_minor, d, 240, 16);\
+ SQUASHFS_SWAP((s)->block_size_1, d, 256, 16);\
+ SQUASHFS_SWAP((s)->block_log, d, 272, 16);\
+ SQUASHFS_SWAP((s)->flags, d, 288, 8);\
+ SQUASHFS_SWAP((s)->no_uids, d, 296, 8);\
+ SQUASHFS_SWAP((s)->no_guids, d, 304, 8);\
+ SQUASHFS_SWAP((s)->mkfs_time, d, 312, 32);\
+ SQUASHFS_SWAP((s)->root_inode, d, 344, 64);\
+ SQUASHFS_SWAP((s)->block_size, d, 408, 32);\
+ SQUASHFS_SWAP((s)->fragments, d, 440, 32);\
+ SQUASHFS_SWAP((s)->fragment_table_start, d, 472, 32);\
+}
+
+#define SQUASHFS_SWAP_BASE_INODE_HEADER(s, d, n) {\
+ SQUASHFS_MEMSET(s, d, n);\
+ SQUASHFS_SWAP((s)->inode_type, d, 0, 4);\
+ SQUASHFS_SWAP((s)->mode, d, 4, 12);\
+ SQUASHFS_SWAP((s)->uid, d, 16, 8);\
+ SQUASHFS_SWAP((s)->guid, d, 24, 8);\
+}
+
+#define SQUASHFS_SWAP_IPC_INODE_HEADER(s, d) SQUASHFS_SWAP_BASE_INODE_HEADER(s, d, sizeof(squashfs_ipc_inode_header))
+
+#define SQUASHFS_SWAP_DEV_INODE_HEADER(s, d) {\
+ SQUASHFS_SWAP_BASE_INODE_HEADER(s, d, sizeof(squashfs_dev_inode_header));\
+ SQUASHFS_SWAP((s)->rdev, d, 32, 16);\
+}
+
+#define SQUASHFS_SWAP_SYMLINK_INODE_HEADER(s, d) {\
+ SQUASHFS_SWAP_BASE_INODE_HEADER(s, d, sizeof(squashfs_symlink_inode_header));\
+ SQUASHFS_SWAP((s)->symlink_size, d, 32, 16);\
+}
+
+#define SQUASHFS_SWAP_REG_INODE_HEADER(s, d) {\
+ SQUASHFS_SWAP_BASE_INODE_HEADER(s, d, sizeof(squashfs_reg_inode_header));\
+ SQUASHFS_SWAP((s)->mtime, d, 32, 32);\
+ SQUASHFS_SWAP((s)->start_block, d, 64, 32);\
+ SQUASHFS_SWAP((s)->fragment, d, 96, 32);\
+ SQUASHFS_SWAP((s)->offset, d, 128, 32);\
+ SQUASHFS_SWAP((s)->file_size, d, 160, SQUASHFS_MAX_FILE_SIZE_LOG);\
+}
+
+#define SQUASHFS_SWAP_DIR_INODE_HEADER(s, d) {\
+ SQUASHFS_SWAP_BASE_INODE_HEADER(s, d, sizeof(squashfs_dir_inode_header));\
+ SQUASHFS_SWAP((s)->file_size, d, 32, 19);\
+ SQUASHFS_SWAP((s)->offset, d, 51, 13);\
+ SQUASHFS_SWAP((s)->mtime, d, 64, 32);\
+ SQUASHFS_SWAP((s)->start_block, d, 96, 24);\
+}
+
+#define SQUASHFS_SWAP_DIR_HEADER(s, d) {\
+ SQUASHFS_MEMSET(s, d, sizeof(squashfs_dir_header));\
+ SQUASHFS_SWAP((s)->count, d, 0, 8);\
+ SQUASHFS_SWAP((s)->start_block, d, 8, 24);\
+}
+
+#define SQUASHFS_SWAP_DIR_ENTRY(s, d) {\
+ SQUASHFS_MEMSET(s, d, sizeof(squashfs_dir_entry));\
+ SQUASHFS_SWAP((s)->offset, d, 0, 13);\
+ SQUASHFS_SWAP((s)->type, d, 13, 3);\
+ SQUASHFS_SWAP((s)->size, d, 16, 8);\
+}
+
+#define SQUASHFS_SWAP_FRAGMENT_ENTRY(s, d) {\
+ SQUASHFS_MEMSET(s, d, sizeof(squashfs_fragment_entry));\
+ SQUASHFS_SWAP((s)->start_block, d, 0, 32);\
+ SQUASHFS_SWAP((s)->size, d, 32, 32);\
+}
+
+#define SQUASHFS_SWAP_SHORTS(s, d, n) {\
+ int entry;\
+ int bit_position;\
+ SQUASHFS_MEMSET(s, d, n * 2);\
+ for(entry = 0, bit_position = 0; entry < n; entry++, bit_position += 16)\
+ SQUASHFS_SWAP(s[entry], d, bit_position, 16);\
+}
+
+#define SQUASHFS_SWAP_INTS(s, d, n) {\
+ int entry;\
+ int bit_position;\
+ SQUASHFS_MEMSET(s, d, n * 4);\
+ for(entry = 0, bit_position = 0; entry < n; entry++, bit_position += 32)\
+ SQUASHFS_SWAP(s[entry], d, bit_position, 32);\
+}
+
+#define SQUASHFS_SWAP_DATA(s, d, n, bits) {\
+ int entry;\
+ int bit_position;\
+ SQUASHFS_MEMSET(s, d, n * bits / 8);\
+ for(entry = 0, bit_position = 0; entry < n; entry++, bit_position += bits)\
+ SQUASHFS_SWAP(s[entry], d, bit_position, bits);\
+}
+
+#define SQUASHFS_SWAP_FRAGMENT_INDEXES(s, d, n) SQUASHFS_SWAP_INTS(s, d, n)
+
+#ifdef SQUASHFS_1_0_COMPATIBILITY
+typedef struct {
+ unsigned int inode_type:4;
+ unsigned int mode:12; /* protection */
+ unsigned int uid:4; /* index into uid table */
+ unsigned int guid:4; /* index into guid table */
+} __attribute__ ((packed)) squashfs_base_inode_header_1;
+
+typedef struct {
+ unsigned int inode_type:4;
+ unsigned int mode:12; /* protection */
+ unsigned int uid:4; /* index into uid table */
+ unsigned int guid:4; /* index into guid table */
+ unsigned int type:4;
+ unsigned int offset:4;
+} __attribute__ ((packed)) squashfs_ipc_inode_header_1;
+
+typedef struct {
+ unsigned int inode_type:4;
+ unsigned int mode:12; /* protection */
+ unsigned int uid:4; /* index into uid table */
+ unsigned int guid:4; /* index into guid table */
+ unsigned short rdev;
+} __attribute__ ((packed)) squashfs_dev_inode_header_1;
+
+typedef struct {
+ unsigned int inode_type:4;
+ unsigned int mode:12; /* protection */
+ unsigned int uid:4; /* index into uid table */
+ unsigned int guid:4; /* index into guid table */
+ unsigned short symlink_size;
+ char symlink[0];
+} __attribute__ ((packed)) squashfs_symlink_inode_header_1;
+
+typedef struct {
+ unsigned int inode_type:4;
+ unsigned int mode:12; /* protection */
+ unsigned int uid:4; /* index into uid table */
+ unsigned int guid:4; /* index into guid table */
+ time_t mtime;
+ squashfs_block start_block;
+ unsigned int file_size:SQUASHFS_MAX_FILE_SIZE_LOG;
+ unsigned short block_list[0];
+} __attribute__ ((packed)) squashfs_reg_inode_header_1;
+
+typedef struct {
+ unsigned int inode_type:4;
+ unsigned int mode:12; /* protection */
+ unsigned int uid:4; /* index into uid table */
+ unsigned int guid:4; /* index into guid table */
+ unsigned int file_size:19;
+ unsigned int offset:13;
+ time_t mtime;
+ unsigned int start_block:24;
+} __attribute__ ((packed)) squashfs_dir_inode_header_1;
+
+#define SQUASHFS_SWAP_BASE_INODE_HEADER_1(s, d, n) {\
+ SQUASHFS_MEMSET(s, d, n);\
+ SQUASHFS_SWAP((s)->inode_type, d, 0, 4);\
+ SQUASHFS_SWAP((s)->mode, d, 4, 12);\
+ SQUASHFS_SWAP((s)->uid, d, 16, 4);\
+ SQUASHFS_SWAP((s)->guid, d, 20, 4);\
+}
+
+#define SQUASHFS_SWAP_IPC_INODE_HEADER_1(s, d) {\
+ SQUASHFS_SWAP_BASE_INODE_HEADER_1(s, d, sizeof(squashfs_ipc_inode_header_1));\
+ SQUASHFS_SWAP((s)->type, d, 24, 4);\
+ SQUASHFS_SWAP((s)->offset, d, 28, 4);\
+}
+
+#define SQUASHFS_SWAP_DEV_INODE_HEADER_1(s, d) {\
+ SQUASHFS_SWAP_BASE_INODE_HEADER_1(s, d, sizeof(squashfs_dev_inode_header_1));\
+ SQUASHFS_SWAP((s)->rdev, d, 24, 16);\
+}
+
+#define SQUASHFS_SWAP_SYMLINK_INODE_HEADER_1(s, d) {\
+ SQUASHFS_SWAP_BASE_INODE_HEADER(s, d, sizeof(squashfs_symlink_inode_header_1));\
+ SQUASHFS_SWAP((s)->symlink_size, d, 24, 16);\
+}
+
+#define SQUASHFS_SWAP_REG_INODE_HEADER_1(s, d) {\
+ SQUASHFS_SWAP_BASE_INODE_HEADER(s, d, sizeof(squashfs_reg_inode_header_1));\
+ SQUASHFS_SWAP((s)->mtime, d, 24, 32);\
+ SQUASHFS_SWAP((s)->start_block, d, 56, 32);\
+ SQUASHFS_SWAP((s)->file_size, d, 88, SQUASHFS_MAX_FILE_SIZE_LOG);\
+}
+
+#define SQUASHFS_SWAP_DIR_INODE_HEADER_1(s, d) {\
+ SQUASHFS_SWAP_BASE_INODE_HEADER(s, d, sizeof(squashfs_dir_inode_header_1));\
+ SQUASHFS_SWAP((s)->file_size, d, 24, 19);\
+ SQUASHFS_SWAP((s)->offset, d, 43, 13);\
+ SQUASHFS_SWAP((s)->mtime, d, 56, 32);\
+ SQUASHFS_SWAP((s)->start_block, d, 88, 24);\
+}
+#endif
+
+#ifdef __KERNEL__
+/*
+ * macros used to swap each structure entry, taking into account
+ * bitfields and different bitfield placing conventions on differing architectures
+ */
+#include <asm/byteorder.h>
+#ifdef __BIG_ENDIAN
+ /* convert from little endian to big endian */
+#define SQUASHFS_SWAP(value, p, pos, tbits) _SQUASHFS_SWAP(value, p, pos, tbits, b_pos)
+#else
+ /* convert from big endian to little endian */
+#define SQUASHFS_SWAP(value, p, pos, tbits) _SQUASHFS_SWAP(value, p, pos, tbits, 64 - tbits - b_pos)
+#endif
+
+#define _SQUASHFS_SWAP(value, p, pos, tbits, SHIFT) {\
+ int bits;\
+ int b_pos = pos % 8;\
+ unsigned long long val = 0;\
+ unsigned char *s = (unsigned char *)p + (pos / 8);\
+ unsigned char *d = ((unsigned char *) &val) + 7;\
+ for(bits = 0; bits < (tbits + b_pos); bits += 8) \
+ *d-- = *s++;\
+ value = (val >> (SHIFT))/* & ((1 << tbits) - 1)*/;\
+}
+#define SQUASHFS_MEMSET(s, d, n) memset(s, 0, n);
+#endif
+#endif
diff -Nurb src/linux/linux.orig/include/linux/squashfs_fs_i.h src/linux/linux/include/linux/squashfs_fs_i.h
--- src/linux/linux.orig/include/linux/squashfs_fs_i.h 1969-12-31 19:00:00.000000000 -0500
+++ src/linux/linux/include/linux/squashfs_fs_i.h 2004-05-25 21:13:03.000000000 -0400
@@ -0,0 +1,33 @@
+#ifndef SQUASHFS_FS_I
+#define SQUASHFS_FS_I
+/*
+ * Squashfs
+ *
+ * Copyright (c) 2002, 2003, 2004 Phillip Lougher <plougher@users.sourceforge.net>
+ *
+ * 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,
+ * 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, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ * squashfs_fs_i.h
+ */
+
+typedef struct squashfs_inode_info {
+ unsigned int start_block;
+ unsigned int block_list_start;
+ unsigned int offset;
+ unsigned int fragment_start_block;
+ unsigned int fragment_size;
+ unsigned int fragment_offset;
+ } squashfs_inode_info;
+#endif
diff -Nurb src/linux/linux.orig/include/linux/squashfs_fs_sb.h src/linux/linux/include/linux/squashfs_fs_sb.h
--- src/linux/linux.orig/include/linux/squashfs_fs_sb.h 1969-12-31 19:00:00.000000000 -0500
+++ src/linux/linux/include/linux/squashfs_fs_sb.h 2004-05-25 21:13:03.000000000 -0400
@@ -0,0 +1,65 @@
+#ifndef SQUASHFS_FS_SB
+#define SQUASHFS_FS_SB
+/*
+ * Squashfs
+ *
+ * Copyright (c) 2002, 2003, 2004 Phillip Lougher <plougher@users.sourceforge.net>
+ *
+ * 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,
+ * 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, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ * squashfs_fs_sb.h
+ */
+
+#include <linux/squashfs_fs.h>
+
+typedef struct {
+ unsigned int block;
+ int length;
+ unsigned int next_index;
+ char *data;
+ } squashfs_cache;
+
+struct squashfs_fragment_cache {
+ unsigned int block;
+ int length;
+ unsigned int locked;
+ char *data;
+ };
+
+typedef struct squashfs_sb_info {
+ squashfs_super_block sBlk;
+ int devblksize;
+ int devblksize_log2;
+ int swap;
+ squashfs_cache *block_cache;
+ struct squashfs_fragment_cache *fragment;
+ int next_cache;
+ int next_fragment;
+ squashfs_uid *uid;
+ squashfs_uid *guid;
+ squashfs_fragment_index *fragment_index;
+ unsigned int read_size;
+ char *read_data;
+ char *read_page;
+ struct semaphore read_page_mutex;
+ struct semaphore block_cache_mutex;
+ struct semaphore fragment_mutex;
+ wait_queue_head_t waitq;
+ wait_queue_head_t fragment_wait_queue;
+ struct inode *(*iget)(struct super_block *s, squashfs_inode inode);
+ unsigned int (*read_blocklist)(struct inode *inode, int index, int readahead_blks,
+ char *block_list, char **block_p, unsigned int *bsize);
+ } squashfs_sb_info;
+#endif
diff -Nurb src/linux/linux.orig/init/do_mounts.c src/linux/linux/init/do_mounts.c
--- src/linux/linux.orig/init/do_mounts.c 2003-11-08 03:13:20.000000000 -0500
+++ src/linux/linux/init/do_mounts.c 2004-05-25 21:13:03.000000000 -0400
@@ -16,6 +16,7 @@
#include <linux/ext2_fs.h>
#include <linux/romfs_fs.h>
#include <linux/cramfs_fs.h>
+#include <linux/squashfs_fs.h>
#undef BUILD_CRAMDISK
@@ -470,6 +471,7 @@
* ext2
* romfs
* gzip
+ * squashfs
*/
static int __init
identify_ramdisk_image(int fd, int start_block)
@@ -479,6 +481,7 @@
struct ext2_super_block *ext2sb;
struct romfs_super_block *romfsb;
struct cramfs_super *cramfsb;
+ struct squashfs_super_block *squashfsb;
int nblocks = -1;
unsigned char *buf;
@@ -490,6 +493,7 @@
ext2sb = (struct ext2_super_block *) buf;
romfsb = (struct romfs_super_block *) buf;
cramfsb = (struct cramfs_super *) buf;
+ squashfsb = (struct squashfs_super_block *) buf;
memset(buf, 0xe5, size);
/*
@@ -536,6 +540,15 @@
goto done;
}
+ /* squashfs is at block zero too */
+ if (squashfsb->s_magic == SQUASHFS_MAGIC) {
+ printk(KERN_NOTICE
+ "RAMDISK: squashfs filesystem found at block %d\n",
+ start_block);
+ nblocks = (squashfsb->bytes_used+BLOCK_SIZE-1)>>BLOCK_SIZE_BITS;
+ goto done;
+ }
+
/*
* Read block 1 to test for minix and ext2 superblock
*/
diff -Nurb src/linux/linux.orig/init/do_mounts.c.orig src/linux/linux/init/do_mounts.c.orig
--- src/linux/linux.orig/init/do_mounts.c.orig 1969-12-31 19:00:00.000000000 -0500
+++ src/linux/linux/init/do_mounts.c.orig 2004-05-25 21:12:42.000000000 -0400
@@ -0,0 +1,1083 @@
+#define __KERNEL_SYSCALLS__
+#include <linux/config.h>
+#include <linux/slab.h>
+#include <linux/devfs_fs_kernel.h>
+#include <linux/unistd.h>
+#include <linux/ctype.h>
+#include <linux/blk.h>
+#include <linux/fd.h>
+#include <linux/tty.h>
+#include <linux/init.h>
+
+#include <linux/nfs_fs.h>
+#include <linux/nfs_fs_sb.h>
+#include <linux/nfs_mount.h>
+#include <linux/minix_fs.h>
+#include <linux/ext2_fs.h>
+#include <linux/romfs_fs.h>
+#include <linux/cramfs_fs.h>
+#include <linux/squashfs_fs.h>
+
+#undef BUILD_CRAMDISK
+
+extern int get_filesystem_list(char * buf);
+
+extern asmlinkage long sys_mount(char *dev_name, char *dir_name, char *type,
+ unsigned long flags, void *data);
+extern asmlinkage long sys_mkdir(const char *name, int mode);
+extern asmlinkage long sys_chdir(const char *name);
+extern asmlinkage long sys_fchdir(int fd);
+extern asmlinkage long sys_chroot(const char *name);
+extern asmlinkage long sys_unlink(const char *name);
+extern asmlinkage long sys_symlink(const char *old, const char *new);
+extern asmlinkage long sys_mknod(const char *name, int mode, dev_t dev);
+extern asmlinkage long sys_umount(char *name, int flags);
+extern asmlinkage long sys_ioctl(int fd, int cmd, unsigned long arg);
+
+#ifdef CONFIG_BLK_DEV_INITRD
+unsigned int real_root_dev; /* do_proc_dointvec cannot handle kdev_t */
+static int __initdata mount_initrd = 1;
+
+static int __init no_initrd(char *str)
+{
+ mount_initrd = 0;
+ return 1;
+}
+
+__setup("noinitrd", no_initrd);
+#else
+static int __initdata mount_initrd = 0;
+#endif
+
+int __initdata rd_doload; /* 1 = load RAM disk, 0 = don't load */
+
+int root_mountflags = MS_RDONLY | MS_VERBOSE;
+static char root_device_name[64];
+
+/* this is initialized in init/main.c */
+kdev_t ROOT_DEV;
+
+static int do_devfs = 0;
+
+static int __init load_ramdisk(char *str)
+{
+ rd_doload = simple_strtol(str,NULL,0) & 3;
+ return 1;
+}
+__setup("load_ramdisk=", load_ramdisk);
+
+static int __init readonly(char *str)
+{
+ if (*str)
+ return 0;
+ root_mountflags |= MS_RDONLY;
+ return 1;
+}
+
+static int __init readwrite(char *str)
+{
+ if (*str)
+ return 0;
+ root_mountflags &= ~MS_RDONLY;
+ return 1;
+}
+
+__setup("ro", readonly);
+__setup("rw", readwrite);
+
+static struct dev_name_struct {
+ const char *name;
+ const int num;
+} root_dev_names[] __initdata = {
+ { "nfs", 0x00ff },
+ { "hda", 0x0300 },
+ { "hdb", 0x0340 },
+ { "loop", 0x0700 },
+ { "hdc", 0x1600 },
+ { "hdd", 0x1640 },
+ { "hde", 0x2100 },
+ { "hdf", 0x2140 },
+ { "hdg", 0x2200 },
+ { "hdh", 0x2240 },
+ { "hdi", 0x3800 },
+ { "hdj", 0x3840 },
+ { "hdk", 0x3900 },
+ { "hdl", 0x3940 },
+ { "hdm", 0x5800 },
+ { "hdn", 0x5840 },
+ { "hdo", 0x5900 },
+ { "hdp", 0x5940 },
+ { "hdq", 0x5A00 },
+ { "hdr", 0x5A40 },
+ { "hds", 0x5B00 },
+ { "hdt", 0x5B40 },
+ { "sda", 0x0800 },
+ { "sdb", 0x0810 },
+ { "sdc", 0x0820 },
+ { "sdd", 0x0830 },
+ { "sde", 0x0840 },
+ { "sdf", 0x0850 },
+ { "sdg", 0x0860 },
+ { "sdh", 0x0870 },
+ { "sdi", 0x0880 },
+ { "sdj", 0x0890 },
+ { "sdk", 0x08a0 },
+ { "sdl", 0x08b0 },
+ { "sdm", 0x08c0 },
+ { "sdn", 0x08d0 },
+ { "sdo", 0x08e0 },
+ { "sdp", 0x08f0 },
+ { "ada", 0x1c00 },
+ { "adb", 0x1c10 },
+ { "adc", 0x1c20 },
+ { "add", 0x1c30 },
+ { "ade", 0x1c40 },
+ { "fd", 0x0200 },
+ { "md", 0x0900 },
+ { "xda", 0x0d00 },
+ { "xdb", 0x0d40 },
+ { "ram", 0x0100 },
+ { "scd", 0x0b00 },
+ { "mcd", 0x1700 },
+ { "cdu535", 0x1800 },
+ { "sonycd", 0x1800 },
+ { "aztcd", 0x1d00 },
+ { "cm206cd", 0x2000 },
+ { "gscd", 0x1000 },
+ { "sbpcd", 0x1900 },
+ { "eda", 0x2400 },
+ { "edb", 0x2440 },
+ { "pda", 0x2d00 },
+ { "pdb", 0x2d10 },
+ { "pdc", 0x2d20 },
+ { "pdd", 0x2d30 },
+ { "pcd", 0x2e00 },
+ { "pf", 0x2f00 },
+ { "apblock", APBLOCK_MAJOR << 8},
+ { "ddv", DDV_MAJOR << 8},
+ { "jsfd", JSFD_MAJOR << 8},
+#if defined(CONFIG_ARCH_S390)
+ { "dasda", (DASD_MAJOR << MINORBITS) },
+ { "dasdb", (DASD_MAJOR << MINORBITS) + (1 << 2) },
+ { "dasdc", (DASD_MAJOR << MINORBITS) + (2 << 2) },
+ { "dasdd", (DASD_MAJOR << MINORBITS) + (3 << 2) },
+ { "dasde", (DASD_MAJOR << MINORBITS) + (4 << 2) },
+ { "dasdf", (DASD_MAJOR << MINORBITS) + (5 << 2) },
+ { "dasdg", (DASD_MAJOR << MINORBITS) + (6 << 2) },
+ { "dasdh", (DASD_MAJOR << MINORBITS) + (7 << 2) },
+#endif
+#if defined(CONFIG_BLK_CPQ_DA) || defined(CONFIG_BLK_CPQ_DA_MODULE)
+ { "ida/c0d0p",0x4800 },
+ { "ida/c0d1p",0x4810 },
+ { "ida/c0d2p",0x4820 },
+ { "ida/c0d3p",0x4830 },
+ { "ida/c0d4p",0x4840 },
+ { "ida/c0d5p",0x4850 },
+ { "ida/c0d6p",0x4860 },
+ { "ida/c0d7p",0x4870 },
+ { "ida/c0d8p",0x4880 },
+ { "ida/c0d9p",0x4890 },
+ { "ida/c0d10p",0x48A0 },
+ { "ida/c0d11p",0x48B0 },
+ { "ida/c0d12p",0x48C0 },
+ { "ida/c0d13p",0x48D0 },
+ { "ida/c0d14p",0x48E0 },
+ { "ida/c0d15p",0x48F0 },
+ { "ida/c1d0p",0x4900 },
+ { "ida/c2d0p",0x4A00 },
+ { "ida/c3d0p",0x4B00 },
+ { "ida/c4d0p",0x4C00 },
+ { "ida/c5d0p",0x4D00 },
+ { "ida/c6d0p",0x4E00 },
+ { "ida/c7d0p",0x4F00 },
+#endif
+#if defined(CONFIG_BLK_CPQ_CISS_DA) || defined(CONFIG_BLK_CPQ_CISS_DA_MODULE)
+ { "cciss/c0d0p",0x6800 },
+ { "cciss/c0d1p",0x6810 },
+ { "cciss/c0d2p",0x6820 },
+ { "cciss/c0d3p",0x6830 },
+ { "cciss/c0d4p",0x6840 },
+ { "cciss/c0d5p",0x6850 },
+ { "cciss/c0d6p",0x6860 },
+ { "cciss/c0d7p",0x6870 },
+ { "cciss/c0d8p",0x6880 },
+ { "cciss/c0d9p",0x6890 },
+ { "cciss/c0d10p",0x68A0 },
+ { "cciss/c0d11p",0x68B0 },
+ { "cciss/c0d12p",0x68C0 },
+ { "cciss/c0d13p",0x68D0 },
+ { "cciss/c0d14p",0x68E0 },
+ { "cciss/c0d15p",0x68F0 },
+ { "cciss/c1d0p",0x6900 },
+ { "cciss/c2d0p",0x6A00 },
+ { "cciss/c3d0p",0x6B00 },
+ { "cciss/c4d0p",0x6C00 },
+ { "cciss/c5d0p",0x6D00 },
+ { "cciss/c6d0p",0x6E00 },
+ { "cciss/c7d0p",0x6F00 },
+#endif
+ { "ataraid/d0p",0x7200 },
+ { "ataraid/d1p",0x7210 },
+ { "ataraid/d2p",0x7220 },
+ { "ataraid/d3p",0x7230 },
+ { "ataraid/d4p",0x7240 },
+ { "ataraid/d5p",0x7250 },
+ { "ataraid/d6p",0x7260 },
+ { "ataraid/d7p",0x7270 },
+ { "ataraid/d8p",0x7280 },
+ { "ataraid/d9p",0x7290 },
+ { "ataraid/d10p",0x72A0 },
+ { "ataraid/d11p",0x72B0 },
+ { "ataraid/d12p",0x72C0 },
+ { "ataraid/d13p",0x72D0 },
+ { "ataraid/d14p",0x72E0 },
+ { "ataraid/d15p",0x72F0 },
+ { "nftla", 0x5d00 },
+ { "nftlb", 0x5d10 },
+ { "nftlc", 0x5d20 },
+ { "nftld", 0x5d30 },
+ { "ftla", 0x2c00 },
+ { "ftlb", 0x2c08 },
+ { "ftlc", 0x2c10 },
+ { "ftld", 0x2c18 },
+#if defined(CONFIG_MTD_BLOCK) || defined(CONFIG_MTD_BLOCK_RO)
+ { "mtdblock", 0x1f00 },
+ { "mtdblock0",0x1f00 },
+ { "mtdblock1",0x1f01 },
+ { "mtdblock2",0x1f02 },
+ { "mtdblock3",0x1f03 },
+#endif
+#ifdef CONFIG_BLK_DEV_DUMMY
+ { "dummy",0x2000 },
+#endif
+ { NULL, 0 }
+};
+
+kdev_t __init name_to_kdev_t(char *line)
+{
+ int base = 0, offs;
+ char *end;
+
+ if (strncmp(line,"/dev/",5) == 0) {
+ struct dev_name_struct *dev = root_dev_names;
+ line += 5;
+ do {
+ int len = strlen(dev->name);
+ if (strncmp(line,dev->name,len) == 0) {
+ line += len;
+ base = dev->num;
+ break;
+ }
+ dev++;
+ } while (dev->name);
+ }
+ offs = simple_strtoul(line, &end, base?10:16);
+ if (*end)
+ offs = 0;
+ return to_kdev_t(base + offs);
+}
+
+static int __init root_dev_setup(char *line)
+{
+ int i;
+ char ch;
+
+ ROOT_DEV = name_to_kdev_t(line);
+ memset (root_device_name, 0, sizeof root_device_name);
+ if (strncmp (line, "/dev/", 5) == 0) line += 5;
+ for (i = 0; i < sizeof root_device_name - 1; ++i)
+ {
+ ch = line[i];
+ if ( isspace (ch) || (ch == ',') || (ch == '\0') ) break;
+ root_device_name[i] = ch;
+ }
+ return 1;
+}
+
+__setup("root=", root_dev_setup);
+
+static char * __initdata root_mount_data;
+static int __init root_data_setup(char *str)
+{
+ root_mount_data = str;
+ return 1;
+}
+
+static char * __initdata root_fs_names;
+static int __init fs_names_setup(char *str)
+{
+ root_fs_names = str;
+ return 1;
+}
+
+__setup("rootflags=", root_data_setup);
+__setup("rootfstype=", fs_names_setup);
+
+static void __init get_fs_names(char *page)
+{
+ char *s = page;
+
+ if (root_fs_names) {
+ strcpy(page, root_fs_names);
+ while (*s++) {
+ if (s[-1] == ',')
+ s[-1] = '\0';
+ }
+ } else {
+ int len = get_filesystem_list(page);
+ char *p, *next;
+
+ page[len] = '\0';
+ for (p = page-1; p; p = next) {
+ next = strchr(++p, '\n');
+ if (*p++ != '\t')
+ continue;
+ while ((*s++ = *p++) != '\n')
+ ;
+ s[-1] = '\0';
+ }
+ }
+ *s = '\0';
+}
+static void __init mount_block_root(char *name, int flags)
+{
+ char *fs_names = __getname();
+ char *p;
+
+ get_fs_names(fs_names);
+retry:
+ for (p = fs_names; *p; p += strlen(p)+1) {
+ int err = sys_mount(name, "/root", p, flags, root_mount_data);
+ switch (err) {
+ case 0:
+ goto out;
+ case -EACCES:
+ flags |= MS_RDONLY;
+ goto retry;
+ case -EINVAL:
+ continue;
+ }
+ /*
+ * Allow the user to distinguish between failed open
+ * and bad superblock on root device.
+ */
+ printk ("VFS: Cannot open root device \"%s\" or %s\n",
+ root_device_name, kdevname (ROOT_DEV));
+ printk ("Please append a correct \"root=\" boot option\n");
+ panic("VFS: Unable to mount root fs on %s",
+ kdevname(ROOT_DEV));
+ }
+ panic("VFS: Unable to mount root fs on %s", kdevname(ROOT_DEV));
+out:
+ putname(fs_names);
+ sys_chdir("/root");
+ ROOT_DEV = current->fs->pwdmnt->mnt_sb->s_dev;
+ printk("VFS: Mounted root (%s filesystem)%s.\n",
+ current->fs->pwdmnt->mnt_sb->s_type->name,
+ (current->fs->pwdmnt->mnt_sb->s_flags & MS_RDONLY) ? " readonly" : "");
+}
+
+#ifdef CONFIG_ROOT_NFS
+static int __init mount_nfs_root(void)
+{
+ void *data = nfs_root_data();
+
+ if (data && sys_mount("/dev/root","/root","nfs",root_mountflags,data) == 0)
+ return 1;
+ return 0;
+}
+#endif
+
+static int __init create_dev(char *name, kdev_t dev, char *devfs_name)
+{
+ void *handle;
+ char path[64];
+ int n;
+
+ sys_unlink(name);
+ if (!do_devfs)
+ return sys_mknod(name, S_IFBLK|0600, kdev_t_to_nr(dev));
+
+ handle = devfs_find_handle(NULL, dev ? NULL : devfs_name,
+ MAJOR(dev), MINOR(dev), DEVFS_SPECIAL_BLK, 1);
+ if (!handle)
+ return -1;
+ n = devfs_generate_path(handle, path + 5, sizeof (path) - 5);
+ if (n < 0)
+ return -1;
+ return sys_symlink(path + n + 5, name);
+}
+
+#if defined(CONFIG_BLK_DEV_RAM) || defined(CONFIG_BLK_DEV_FD)
+static void __init change_floppy(char *fmt, ...)
+{
+ struct termios termios;
+ char buf[80];
+ char c;
+ int fd;
+ va_list args;
+ va_start(args, fmt);
+ vsprintf(buf, fmt, args);
+ va_end(args);
+ fd = open("/dev/root", O_RDWR | O_NDELAY, 0);
+ if (fd >= 0) {
+ sys_ioctl(fd, FDEJECT, 0);
+ close(fd);
+ }
+ printk(KERN_NOTICE "VFS: Insert %s and press ENTER\n", buf);
+ fd = open("/dev/console", O_RDWR, 0);
+ if (fd >= 0) {
+ sys_ioctl(fd, TCGETS, (long)&termios);
+ termios.c_lflag &= ~ICANON;
+ sys_ioctl(fd, TCSETSF, (long)&termios);
+ read(fd, &c, 1);
+ termios.c_lflag |= ICANON;
+ sys_ioctl(fd, TCSETSF, (long)&termios);
+ close(fd);
+ }
+}
+#endif
+
+#ifdef CONFIG_BLK_DEV_RAM
+
+int __initdata rd_prompt = 1; /* 1 = prompt for RAM disk, 0 = don't prompt */
+
+static int __init prompt_ramdisk(char *str)
+{
+ rd_prompt = simple_strtol(str,NULL,0) & 1;
+ return 1;
+}
+__setup("prompt_ramdisk=", prompt_ramdisk);
+
+int __initdata rd_image_start; /* starting block # of image */
+
+static int __init ramdisk_start_setup(char *str)
+{
+ rd_image_start = simple_strtol(str,NULL,0);
+ return 1;
+}
+__setup("ramdisk_start=", ramdisk_start_setup);
+
+static int __init crd_load(int in_fd, int out_fd);
+
+/*
+ * This routine tries to find a RAM disk image to load, and returns the
+ * number of blocks to read for a non-compressed image, 0 if the image
+ * is a compressed image, and -1 if an image with the right magic
+ * numbers could not be found.
+ *
+ * We currently check for the following magic numbers:
+ * minix
+ * ext2
+ * romfs
+ * gzip
+ */
+static int __init
+identify_ramdisk_image(int fd, int start_block)
+{
+ const int size = 512;
+ struct minix_super_block *minixsb;
+ struct ext2_super_block *ext2sb;
+ struct romfs_super_block *romfsb;
+ struct cramfs_super *cramfsb;
+ struct squashfs_super_block *squashfsb;
+ int nblocks = -1;
+ unsigned char *buf;
+
+ buf = kmalloc(size, GFP_KERNEL);
+ if (buf == 0)
+ return -1;
+
+ minixsb = (struct minix_super_block *) buf;
+ ext2sb = (struct ext2_super_block *) buf;
+ romfsb = (struct romfs_super_block *) buf;
+ cramfsb = (struct cramfs_super *) buf;
+ squashfsb = (struct squashfs_super_block *) buf;
+ memset(buf, 0xe5, size);
+
+ /*
+ * Read block 0 to test for gzipped kernel
+ */
+ lseek(fd, start_block * BLOCK_SIZE, 0);
+ read(fd, buf, size);
+
+ /*
+ * If it matches the gzip magic numbers, return -1
+ */
+ if (buf[0] == 037 && ((buf[1] == 0213) || (buf[1] == 0236))) {
+ printk(KERN_NOTICE
+ "RAMDISK: Compressed image found at block %d\n",
+ start_block);
+ nblocks = 0;
+ goto done;
+ }
+
+#ifdef CONFIG_BLK_DEV_INITRD
+ /*
+ * Fallback if size cannot be determined by superblock
+ */
+ nblocks = (initrd_end-initrd_start+BLOCK_SIZE-1)>>BLOCK_SIZE_BITS;
+#endif
+
+ /* romfs is at block zero too */
+ if (romfsb->word0 == ROMSB_WORD0 &&
+ romfsb->word1 == ROMSB_WORD1) {
+ printk(KERN_NOTICE
+ "RAMDISK: romfs filesystem found at block %d\n",
+ start_block);
+ nblocks = (ntohl(romfsb->size)+BLOCK_SIZE-1)>>BLOCK_SIZE_BITS;
+ goto done;
+ }
+
+ /* so is cramfs */
+ if (cramfsb->magic == CRAMFS_MAGIC) {
+ printk(KERN_NOTICE
+ "RAMDISK: cramfs filesystem found at block %d\n",
+ start_block);
+ if (cramfsb->flags & CRAMFS_FLAG_FSID_VERSION_2)
+ nblocks = (cramfsb->size+BLOCK_SIZE-1)>>BLOCK_SIZE_BITS;
+ goto done;
+ }
+
+ /*
+ * Read block 1 to test for minix and ext2 superblock
+ */
+ lseek(fd, (start_block+1) * BLOCK_SIZE, 0);
+ read(fd, buf, size);
+
+ /* Try minix */
+ if (minixsb->s_magic == MINIX_SUPER_MAGIC ||
+ minixsb->s_magic == MINIX_SUPER_MAGIC2) {
+ printk(KERN_NOTICE
+ "RAMDISK: Minix filesystem found at block %d\n",
+ start_block);
+ nblocks = minixsb->s_nzones << minixsb->s_log_zone_size;
+ goto done;
+ }
+
+ /* Try ext2 */
+ if (ext2sb->s_magic == cpu_to_le16(EXT2_SUPER_MAGIC)) {
+ printk(KERN_NOTICE
+ "RAMDISK: ext2 filesystem found at block %d\n",
+ start_block);
+ nblocks = le32_to_cpu(ext2sb->s_blocks_count);
+ goto done;
+ }
+
+ printk(KERN_NOTICE
+ "RAMDISK: Couldn't find valid RAM disk image starting at %d.\n",
+ start_block);
+ nblocks = -1;
+
+done:
+ lseek(fd, start_block * BLOCK_SIZE, 0);
+ kfree(buf);
+ return nblocks;
+}
+#endif
+
+static int __init rd_load_image(char *from)
+{
+ int res = 0;
+
+#ifdef CONFIG_BLK_DEV_RAM
+ int in_fd, out_fd;
+ unsigned long rd_blocks, devblocks;
+ int nblocks, i;
+ char *buf;
+ unsigned short rotate = 0;
+#if !defined(CONFIG_ARCH_S390) && !defined(CONFIG_PPC_ISERIES)
+ char rotator[4] = { '|' , '/' , '-' , '\\' };
+#endif
+
+ out_fd = open("/dev/ram", O_RDWR, 0);
+ if (out_fd < 0)
+ goto out;
+
+ in_fd = open(from, O_RDONLY, 0);
+ if (in_fd < 0)
+ goto noclose_input;
+
+ nblocks = identify_ramdisk_image(in_fd, rd_image_start);
+ if (nblocks < 0)
+ goto done;
+
+ if (nblocks == 0) {
+#ifdef BUILD_CRAMDISK
+ if (crd_load(in_fd, out_fd) == 0)
+ goto successful_load;
+#else
+ printk(KERN_NOTICE
+ "RAMDISK: Kernel does not support compressed "
+ "RAM disk images\n");
+#endif
+ goto done;
+ }
+
+ /*
+ * NOTE NOTE: nblocks suppose that the blocksize is BLOCK_SIZE, so
+ * rd_load_image will work only with filesystem BLOCK_SIZE wide!
+ * So make sure to use 1k blocksize while generating ext2fs
+ * ramdisk-images.
+ */
+ if (sys_ioctl(out_fd, BLKGETSIZE, (unsigned long)&rd_blocks) < 0)
+ rd_blocks = 0;
+ else
+ rd_blocks >>= 1;
+
+ if (nblocks > rd_blocks) {
+ printk("RAMDISK: image too big! (%d/%d blocks)\n",
+ nblocks, rd_blocks);
+ goto done;
+ }
+
+ /*
+ * OK, time to copy in the data
+ */
+ buf = kmalloc(BLOCK_SIZE, GFP_KERNEL);
+ if (buf == 0) {
+ printk(KERN_ERR "RAMDISK: could not allocate buffer\n");
+ goto done;
+ }
+
+ if (sys_ioctl(in_fd, BLKGETSIZE, (unsigned long)&devblocks) < 0)
+ devblocks = 0;
+ else
+ devblocks >>= 1;
+
+ if (strcmp(from, "/dev/initrd") == 0)
+ devblocks = nblocks;
+
+ if (devblocks == 0) {
+ printk(KERN_ERR "RAMDISK: could not determine device size\n");
+ goto done;
+ }
+
+ printk(KERN_NOTICE "RAMDISK: Loading %d blocks [%d disk%s] into ram disk... ",
+ nblocks, ((nblocks-1)/devblocks)+1, nblocks>devblocks ? "s" : "");
+ for (i=0; i < nblocks; i++) {
+ if (i && (i % devblocks == 0)) {
+ printk("done disk #%d.\n", i/devblocks);
+ rotate = 0;
+ if (close(in_fd)) {
+ printk("Error closing the disk.\n");
+ goto noclose_input;
+ }
+ change_floppy("disk #%d", i/devblocks+1);
+ in_fd = open(from, O_RDONLY, 0);
+ if (in_fd < 0) {
+ printk("Error opening disk.\n");
+ goto noclose_input;
+ }
+ printk("Loading disk #%d... ", i/devblocks+1);
+ }
+ read(in_fd, buf, BLOCK_SIZE);
+ write(out_fd, buf, BLOCK_SIZE);
+#if !defined(CONFIG_ARCH_S390) && !defined(CONFIG_PPC_ISERIES)
+ if (!(i % 16)) {
+ printk("%c\b", rotator[rotate & 0x3]);
+ rotate++;
+ }
+#endif
+ }
+ printk("done.\n");
+ kfree(buf);
+
+successful_load:
+ res = 1;
+done:
+ close(in_fd);
+noclose_input:
+ close(out_fd);
+out:
+ sys_unlink("/dev/ram");
+#endif
+ return res;
+}
+
+static int __init rd_load_disk(int n)
+{
+#ifdef CONFIG_BLK_DEV_RAM
+ if (rd_prompt)
+ change_floppy("root floppy disk to be loaded into RAM disk");
+ create_dev("/dev/ram", MKDEV(RAMDISK_MAJOR, n), NULL);
+#endif
+ return rd_load_image("/dev/root");
+}
+
+#ifdef CONFIG_DEVFS_FS
+
+static void __init convert_name(char *prefix, char *name, char *p, int part)
+{
+ int host, bus, target, lun;
+ char dest[64];
+ char src[64];
+ char *base = p - 1;
+
+ /* Decode "c#b#t#u#" */
+ if (*p++ != 'c')
+ return;
+ host = simple_strtol(p, &p, 10);
+ if (*p++ != 'b')
+ return;
+ bus = simple_strtol(p, &p, 10);
+ if (*p++ != 't')
+ return;
+ target = simple_strtol(p, &p, 10);
+ if (*p++ != 'u')
+ return;
+ lun = simple_strtol(p, &p, 10);
+ if (!part)
+ sprintf(dest, "%s/host%d/bus%d/target%d/lun%d",
+ prefix, host, bus, target, lun);
+ else if (*p++ == 'p')
+ sprintf(dest, "%s/host%d/bus%d/target%d/lun%d/part%s",
+ prefix, host, bus, target, lun, p);
+ else
+ sprintf(dest, "%s/host%d/bus%d/target%d/lun%d/disc",
+ prefix, host, bus, target, lun);
+ *base = '\0';
+ sprintf(src, "/dev/%s", name);
+ sys_mkdir(src, 0755);
+ *base = '/';
+ sprintf(src, "/dev/%s", name);
+ sys_symlink(dest, src);
+}
+
+static void __init devfs_make_root(char *name)
+{
+
+ if (!strncmp(name, "sd/", 3))
+ convert_name("../scsi", name, name+3, 1);
+ else if (!strncmp(name, "sr/", 3))
+ convert_name("../scsi", name, name+3, 0);
+ else if (!strncmp(name, "ide/hd/", 7))
+ convert_name("..", name, name + 7, 1);
+ else if (!strncmp(name, "ide/cd/", 7))
+ convert_name("..", name, name + 7, 0);
+}
+#else
+static void __init devfs_make_root(char *name)
+{
+}
+#endif
+
+static void __init mount_root(void)
+{
+#ifdef CONFIG_ROOT_NFS
+ if (MAJOR(ROOT_DEV) == UNNAMED_MAJOR) {
+ if (mount_nfs_root()) {
+ sys_chdir("/root");
+ ROOT_DEV = current->fs->pwdmnt->mnt_sb->s_dev;
+ printk("VFS: Mounted root (nfs filesystem).\n");
+ return;
+ }
+ printk(KERN_ERR "VFS: Unable to mount root fs via NFS, trying floppy.\n");
+ ROOT_DEV = MKDEV(FLOPPY_MAJOR, 0);
+ }
+#endif
+ devfs_make_root(root_device_name);
+ create_dev("/dev/root", ROOT_DEV, root_device_name);
+#ifdef CONFIG_BLK_DEV_FD
+ if (MAJOR(ROOT_DEV) == FLOPPY_MAJOR) {
+ /* rd_doload is 2 for a dual initrd/ramload setup */
+ if (rd_doload==2) {
+ if (rd_load_disk(1)) {
+ ROOT_DEV = MKDEV(RAMDISK_MAJOR, 1);
+ create_dev("/dev/root", ROOT_DEV, NULL);
+ }
+ } else
+ change_floppy("root floppy");
+ }
+#endif
+#if defined(CONFIG_MTD_BLOCK) || defined(CONFIG_MTD_BLOCK_RO)
+ if (MAJOR(ROOT_DEV) == 31) {
+ /* rd_doload is for a ramload setup */
+ if (rd_doload) {
+ if (rd_load_disk(0)) {
+ ROOT_DEV = MKDEV(RAMDISK_MAJOR, 0);
+ create_dev("/dev/root", ROOT_DEV, NULL);
+ }
+ }
+ }
+#endif
+ mount_block_root("/dev/root", root_mountflags);
+}
+
+#ifdef CONFIG_BLK_DEV_INITRD
+static int old_fd, root_fd;
+static int do_linuxrc(void * shell)
+{
+ static char *argv[] = { "linuxrc", NULL, };
+ extern char * envp_init[];
+
+ close(old_fd);
+ close(root_fd);
+ close(0);
+ close(1);
+ close(2);
+ setsid();
+ (void) open("/dev/console",O_RDWR,0);
+ (void) dup(0);
+ (void) dup(0);
+ return execve(shell, argv, envp_init);
+}
+
+#endif
+
+static void __init handle_initrd(void)
+{
+#ifdef CONFIG_BLK_DEV_INITRD
+ int ram0 = kdev_t_to_nr(MKDEV(RAMDISK_MAJOR,0));
+ int error;
+ int i, pid;
+
+ create_dev("/dev/root.old", ram0, NULL);
+ /* mount initrd on rootfs' /root */
+ mount_block_root("/dev/root.old", root_mountflags & ~MS_RDONLY);
+ sys_mkdir("/old", 0700);
+ root_fd = open("/", 0, 0);
+ old_fd = open("/old", 0, 0);
+ /* move initrd over / and chdir/chroot in initrd root */
+ sys_chdir("/root");
+ sys_mount(".", "/", NULL, MS_MOVE, NULL);
+ sys_chroot(".");
+ mount_devfs_fs ();
+
+ pid = kernel_thread(do_linuxrc, "/linuxrc", SIGCHLD);
+ if (pid > 0) {
+ while (pid != wait(&i))
+ yield();
+ }
+
+ /* move initrd to rootfs' /old */
+ sys_fchdir(old_fd);
+ sys_mount("/", ".", NULL, MS_MOVE, NULL);
+ /* switch root and cwd back to / of rootfs */
+ sys_fchdir(root_fd);
+ sys_chroot(".");
+ sys_umount("/old/dev", 0);
+
+ if (real_root_dev == ram0) {
+ sys_chdir("/old");
+ return;
+ }
+
+ ROOT_DEV = real_root_dev;
+ mount_root();
+
+ printk(KERN_NOTICE "Trying to move old root to /initrd ... ");
+ error = sys_mount("/old", "/root/initrd", NULL, MS_MOVE, NULL);
+ if (!error)
+ printk("okay\n");
+ else {
+ int fd = open("/dev/root.old", O_RDWR, 0);
+ printk("failed\n");
+ printk(KERN_NOTICE "Unmounting old root\n");
+ sys_umount("/old", MNT_DETACH);
+ printk(KERN_NOTICE "Trying to free ramdisk memory ... ");
+ if (fd < 0) {
+ error = fd;
+ } else {
+ error = sys_ioctl(fd, BLKFLSBUF, 0);
+ close(fd);
+ }
+ printk(!error ? "okay\n" : "failed\n");
+ }
+#endif
+}
+
+static int __init initrd_load(void)
+{
+#ifdef CONFIG_BLK_DEV_INITRD
+ create_dev("/dev/ram", MKDEV(RAMDISK_MAJOR, 0), NULL);
+ create_dev("/dev/initrd", MKDEV(RAMDISK_MAJOR, INITRD_MINOR), NULL);
+#endif
+ return rd_load_image("/dev/initrd");
+}
+
+/*
+ * Prepare the namespace - decide what/where to mount, load ramdisks, etc.
+ */
+void prepare_namespace(void)
+{
+ int is_floppy = MAJOR(ROOT_DEV) == FLOPPY_MAJOR;
+#ifdef CONFIG_ALL_PPC
+ extern void arch_discover_root(void);
+ arch_discover_root();
+#endif /* CONFIG_ALL_PPC */
+#ifdef CONFIG_BLK_DEV_INITRD
+ if (!initrd_start)
+ mount_initrd = 0;
+ real_root_dev = ROOT_DEV;
+#endif
+ sys_mkdir("/dev", 0700);
+ sys_mkdir("/root", 0700);
+ sys_mknod("/dev/console", S_IFCHR|0600, MKDEV(TTYAUX_MAJOR, 1));
+#ifdef CONFIG_DEVFS_FS
+ sys_mount("devfs", "/dev", "devfs", 0, NULL);
+ do_devfs = 1;
+#endif
+
+ create_dev("/dev/root", ROOT_DEV, NULL);
+ if (mount_initrd) {
+ if (initrd_load() && ROOT_DEV != MKDEV(RAMDISK_MAJOR, 0)) {
+ handle_initrd();
+ goto out;
+ }
+ } else if (is_floppy && rd_doload && rd_load_disk(0))
+ ROOT_DEV = MKDEV(RAMDISK_MAJOR, 0);
+ mount_root();
+out:
+ sys_umount("/dev", 0);
+ sys_mount(".", "/", NULL, MS_MOVE, NULL);
+ sys_chroot(".");
+ mount_devfs_fs ();
+}
+
+#if defined(BUILD_CRAMDISK) && defined(CONFIG_BLK_DEV_RAM)
+
+/*
+ * gzip declarations
+ */
+
+#define OF(args) args
+
+#ifndef memzero
+#define memzero(s, n) memset ((s), 0, (n))
+#endif
+
+typedef unsigned char uch;
+typedef unsigned short ush;
+typedef unsigned long ulg;
+
+#define INBUFSIZ 4096
+#define WSIZE 0x8000 /* window size--must be a power of two, and */
+ /* at least 32K for zip's deflate method */
+
+static uch *inbuf;
+static uch *window;
+
+static unsigned insize; /* valid bytes in inbuf */
+static unsigned inptr; /* index of next byte to be processed in inbuf */
+static unsigned outcnt; /* bytes in output buffer */
+static int exit_code;
+static long bytes_out;
+static int crd_infd, crd_outfd;
+
+#define get_byte() (inptr < insize ? inbuf[inptr++] : fill_inbuf())
+
+/* Diagnostic functions (stubbed out) */
+#define Assert(cond,msg)
+#define Trace(x)
+#define Tracev(x)
+#define Tracevv(x)
+#define Tracec(c,x)
+#define Tracecv(c,x)
+
+#define STATIC static
+
+static int fill_inbuf(void);
+static void flush_window(void);
+static void *malloc(int size);
+static void free(void *where);
+static void error(char *m);
+static void gzip_mark(void **);
+static void gzip_release(void **);
+
+#include "../lib/inflate.c"
+
+static void __init *malloc(int size)
+{
+ return kmalloc(size, GFP_KERNEL);
+}
+
+static void __init free(void *where)
+{
+ kfree(where);
+}
+
+static void __init gzip_mark(void **ptr)
+{
+}
+
+static void __init gzip_release(void **ptr)
+{
+}
+
+
+/* ===========================================================================
+ * Fill the input buffer. This is called only when the buffer is empty
+ * and at least one byte is really needed.
+ */
+static int __init fill_inbuf(void)
+{
+ if (exit_code) return -1;
+
+ insize = read(crd_infd, inbuf, INBUFSIZ);
+ if (insize == 0) return -1;
+
+ inptr = 1;
+
+ return inbuf[0];
+}
+
+/* ===========================================================================
+ * Write the output window window[0..outcnt-1] and update crc and bytes_out.
+ * (Used for the decompressed data only.)
+ */
+static void __init flush_window(void)
+{
+ ulg c = crc; /* temporary variable */
+ unsigned n;
+ uch *in, ch;
+
+ write(crd_outfd, window, outcnt);
+ in = window;
+ for (n = 0; n < outcnt; n++) {
+ ch = *in++;
+ c = crc_32_tab[((int)c ^ ch) & 0xff] ^ (c >> 8);
+ }
+ crc = c;
+ bytes_out += (ulg)outcnt;
+ outcnt = 0;
+}
+
+static void __init error(char *x)
+{
+ printk(KERN_ERR "%s", x);
+ exit_code = 1;
+}
+
+static int __init crd_load(int in_fd, int out_fd)
+{
+ int result;
+
+ insize = 0; /* valid bytes in inbuf */
+ inptr = 0; /* index of next byte to be processed in inbuf */
+ outcnt = 0; /* bytes in output buffer */
+ exit_code = 0;
+ bytes_out = 0;
+ crc = (ulg)0xffffffffL; /* shift register contents */
+
+ crd_infd = in_fd;
+ crd_outfd = out_fd;
+ inbuf = kmalloc(INBUFSIZ, GFP_KERNEL);
+ if (inbuf == 0) {
+ printk(KERN_ERR "RAMDISK: Couldn't allocate gzip buffer\n");
+ return -1;
+ }
+ window = kmalloc(WSIZE, GFP_KERNEL);
+ if (window == 0) {
+ printk(KERN_ERR "RAMDISK: Couldn't allocate gzip window\n");
+ kfree(inbuf);
+ return -1;
+ }
+ makecrc();
+ result = gunzip();
+ kfree(inbuf);
+ kfree(window);
+ return result;
+}
+
+#endif /* BUILD_CRAMDISK && CONFIG_BLK_DEV_RAM */
diff -Nurb src/linux/linux.orig/kernel/ksyms.c src/linux/linux/kernel/ksyms.c
--- src/linux/linux.orig/kernel/ksyms.c 2003-07-04 04:12:28.000000000 -0400
+++ src/linux/linux/kernel/ksyms.c 2004-05-25 21:12:24.000000000 -0400
@@ -482,9 +482,9 @@
EXPORT_SYMBOL(simple_strtoull);
EXPORT_SYMBOL(system_utsname); /* UTS data */
EXPORT_SYMBOL(uts_sem); /* UTS semaphore */
-#ifndef __mips__
+//#ifndef __mips__ //bite me. -mbm.
EXPORT_SYMBOL(sys_call_table);
-#endif
+//#endif
EXPORT_SYMBOL(machine_restart);
EXPORT_SYMBOL(machine_halt);
EXPORT_SYMBOL(machine_power_off);
diff -Nurb src/linux/linux.orig/lib/Config.in src/linux/linux/lib/Config.in
--- src/linux/linux.orig/lib/Config.in 2003-07-04 04:12:29.000000000 -0400
+++ src/linux/linux/lib/Config.in 2004-05-25 21:13:03.000000000 -0400
@@ -8,12 +8,14 @@
# Do we need the compression support?
#
if [ "$CONFIG_CRAMFS" = "y" -o \
+ "$CONFIG_SQUASHFS" = "y" -o \
"$CONFIG_PPP_DEFLATE" = "y" -o \
"$CONFIG_JFFS2_FS" = "y" -o \
"$CONFIG_ZISOFS_FS" = "y" ]; then
define_tristate CONFIG_ZLIB_INFLATE y
else
if [ "$CONFIG_CRAMFS" = "m" -o \
+ "$CONFIG_SQUASHFS" = "m" -o \
"$CONFIG_PPP_DEFLATE" = "m" -o \
"$CONFIG_JFFS2_FS" = "m" -o \
"$CONFIG_ZISOFS_FS" = "m" ]; then
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