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Squashfs: initrd support

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Signed-off-by: Phillip Lougher <phillip@lougher.demon.co.uk>
This commit is contained in:
Phillip Lougher 2009-01-05 08:46:28 +00:00
parent 6ab5c1ca71
commit b8fed87d32
1 changed files with 14 additions and 0 deletions
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14
init/do_mounts_rd.c
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@ -9,6 +9,7 @@
#include <linux/string.h>
#include "do_mounts.h"
#include "../fs/squashfs/squashfs_fs.h"
int __initdata rd_prompt = 1;/* 1 = prompt for RAM disk, 0 = don't prompt */
@ -41,6 +42,7 @@ static int __init crd_load(int in_fd, int out_fd);
* ext2
* romfs
* cramfs
* squashfs
* gzip
*/
static int __init
@ -51,6 +53,7 @@ identify_ramdisk_image(int fd, int start_block)
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;
@ -62,6 +65,7 @@ identify_ramdisk_image(int fd, int start_block)
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);
/*
@ -99,6 +103,16 @@ identify_ramdisk_image(int fd, int start_block)
goto done;
}
/* squashfs is at block zero too */
if (le32_to_cpu(squashfsb->s_magic) == SQUASHFS_MAGIC) {
printk(KERN_NOTICE
"RAMDISK: squashfs filesystem found at block %d\n",
start_block);
nblocks = (le64_to_cpu(squashfsb->bytes_used) + BLOCK_SIZE - 1)
>> BLOCK_SIZE_BITS;
goto done;
}
/*
* Read block 1 to test for minix and ext2 superblock
*/