diff options
Diffstat (limited to 'obsolete-buildroot/sources/openwrt/kernel/patches/120-openwrt.patch')
| -rw-r--r-- | obsolete-buildroot/sources/openwrt/kernel/patches/120-openwrt.patch | 2521 |
1 files changed, 2521 insertions, 0 deletions
diff --git a/obsolete-buildroot/sources/openwrt/kernel/patches/120-openwrt.patch b/obsolete-buildroot/sources/openwrt/kernel/patches/120-openwrt.patch new file mode 100644 index 000000000..37c1dd34f --- /dev/null +++ b/obsolete-buildroot/sources/openwrt/kernel/patches/120-openwrt.patch @@ -0,0 +1,2521 @@ +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/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/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 |