Squashfs: initrd support

Signed-off-by: Phillip Lougher <phillip@lougher.demon.co.uk>

diff --git a/init/do_mounts_rd.c b/init/do_mounts_rd.c
index a7c748f..0f0f0cf 100644 (file)
--- a/init/do_mounts_rd.c
+++ b/init/do_mounts_rd.c
@@ -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
         */