Merge git://git.kernel.org/pub/scm/linux/kernel/git/arjan/linux-2.6-async-for-30

[safe/jmp/linux-2.6] / init / initramfs.c

diff --git a/init/initramfs.c b/init/initramfs.c
index d3c56fc..619c1ba 100644 (file)
--- a/init/initramfs.c
+++ b/init/initramfs.c
@@ -383,11 +383,13 @@ static int __init write_buffer(char *buf, unsigned len)
        return len - count;
 }
 
-static void __init flush_buffer(char *buf, unsigned len)
+static int __init flush_buffer(void *bufv, unsigned len)
 {
+       char *buf = (char *) bufv;
        int written;
+       int origLen = len;
        if (message)
-               return;
+               return -1;
        while ((written = write_buffer(buf, len)) < len && !message) {
                char c = buf[written];
                if (c == '0') {
@@ -401,83 +403,27 @@ static void __init flush_buffer(char *buf, unsigned len)
                } else
                        error("junk in compressed archive");
        }
+       return origLen;
 }
 
-/*
- * 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 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 long bytes_out;
-
-#define get_byte()  (inptr < insize ? inbuf[inptr++] : -1)
-               
-/* 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
-#define INIT __init
-
-static void __init flush_window(void);
-static void __init error(char *m);
-
-#define NO_INFLATE_MALLOC
+static unsigned my_inptr;   /* index of next byte to be processed in inbuf */
 
-#include "../lib/inflate.c"
-
-/* ===========================================================================
- * 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;
-
-       flush_buffer(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;
-}
+#include <linux/decompress/generic.h>
 
 static char * __init unpack_to_rootfs(char *buf, unsigned len)
 {
        int written;
+       decompress_fn decompress;
+       const char *compress_name;
+       static __initdata char msg_buf[64];
+
        header_buf = kmalloc(110, GFP_KERNEL);
        symlink_buf = kmalloc(PATH_MAX + N_ALIGN(PATH_MAX) + 1, GFP_KERNEL);
        name_buf = kmalloc(N_ALIGN(PATH_MAX), GFP_KERNEL);
-       window = kmalloc(WSIZE, GFP_KERNEL);
-       if (!window || !header_buf || !symlink_buf || !name_buf)
+
+       if (!header_buf || !symlink_buf || !name_buf)
                panic("can't allocate buffers");
+
        state = Start;
        this_header = 0;
        message = NULL;
@@ -497,22 +443,25 @@ static char * __init unpack_to_rootfs(char *buf, unsigned len)
                        continue;
                }
                this_header = 0;
-               insize = len;
-               inbuf = buf;
-               inptr = 0;
-               outcnt = 0;             /* bytes in output buffer */
-               bytes_out = 0;
-               crc = (ulg)0xffffffffL; /* shift register contents */
-               makecrc();
-               gunzip();
+               decompress = decompress_method(buf, len, &compress_name);
+               if (decompress)
+                       decompress(buf, len, NULL, flush_buffer, NULL,
+                                  &my_inptr, error);
+               else if (compress_name) {
+                       if (!message) {
+                               snprintf(msg_buf, sizeof msg_buf,
+                                        "compression method %s not configured",
+                                        compress_name);
+                               message = msg_buf;
+                       }
+               }
                if (state != Reset)
-                       error("junk in gzipped archive");
-               this_header = saved_offset + inptr;
-               buf += inptr;
-               len -= inptr;
+                       error("junk in compressed archive");
+               this_header = saved_offset + my_inptr;
+               buf += my_inptr;
+               len -= my_inptr;
        }
        dir_utime();
-       kfree(window);
        kfree(name_buf);
        kfree(symlink_buf);
        kfree(header_buf);
@@ -618,7 +567,7 @@ static int __init populate_rootfs(void)
        char *err = unpack_to_rootfs(__initramfs_start,
                         __initramfs_end - __initramfs_start);
        if (err)
-               panic(err);
+               panic(err);     /* Failed to decompress INTERNAL initramfs */
        if (initrd_start) {
 #ifdef CONFIG_BLK_DEV_RAM
                int fd;
@@ -646,9 +595,12 @@ static int __init populate_rootfs(void)
                printk(KERN_INFO "Unpacking initramfs...");
                err = unpack_to_rootfs((char *)initrd_start,
                        initrd_end - initrd_start);
-               if (err)
-                       panic(err);
-               printk(" done\n");
+               if (err) {
+                       printk(" failed!\n");
+                       printk(KERN_EMERG "%s\n", err);
+               } else {
+                       printk(" done\n");
+               }
                free_initrd();
 #endif
        }