path: root/init/initramfs.c
diff options
authorYinghai Lu <yinghai@kernel.org>2014-08-08 14:23:14 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2014-08-08 15:57:26 -0700
commitd97b07c54f34e88352ebe676beb798c8f59ac588 (patch)
tree3b864aca26ab13d9fdcdca3d1bdabc69830cea01 /init/initramfs.c
parent38747439914c468ecba70b492b54dc4ef0b50453 (diff)
initramfs: support initramfs that is bigger than 2GiB
Now with 64bit bzImage and kexec tools, we support ramdisk that size is bigger than 2g, as we could put it above 4G. Found compressed initramfs image could not be decompressed properly. It turns out that image length is int during decompress detection, and it will become < 0 when length is more than 2G. Furthermore, during decompressing len as int is used for inbuf count, that has problem too. Change len to long, that should be ok as on 32 bit platform long is 32bits. Tested with following compressed initramfs image as root with kexec. gzip, bzip2, xz, lzma, lzop, lz4. run time for populate_rootfs(): size name Nehalem-EX Westmere-EX Ivybridge-EX 9034400256 root_img : 26s 24s 30s 3561095057 root_img.lz4 : 28s 27s 27s 3459554629 root_img.lzo : 29s 29s 28s 3219399480 root_img.gz : 64s 62s 49s 2251594592 root_img.xz : 262s 260s 183s 2226366598 root_img.lzma: 386s 376s 277s 2901482513 root_img.bz2 : 635s 599s Signed-off-by: Yinghai Lu <yinghai@kernel.org> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Rashika Kheria <rashika.kheria@gmail.com> Cc: Josh Triplett <josh@joshtriplett.org> Cc: Kyungsik Lee <kyungsik.lee@lge.com> Cc: P J P <ppandit@redhat.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Tetsuo Handa <penguin-kernel@i-love.sakura.ne.jp> Cc: "Daniel M. Weeks" <dan@danweeks.net> Cc: Alexandre Courbot <acourbot@nvidia.com> Cc: Jan Beulich <JBeulich@suse.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'init/initramfs.c')
1 files changed, 11 insertions, 11 deletions
diff --git a/init/initramfs.c b/init/initramfs.c
index 4f276b6a167b..a7566031242e 100644
--- a/init/initramfs.c
+++ b/init/initramfs.c
@@ -197,7 +197,7 @@ static __initdata enum state {
} state, next_state;
static __initdata char *victim;
-static __initdata unsigned count;
+static unsigned long count __initdata;
static __initdata loff_t this_header, next_header;
static inline void __init eat(unsigned n)
@@ -209,7 +209,7 @@ static inline void __init eat(unsigned n)
static __initdata char *vcollected;
static __initdata char *collected;
-static __initdata int remains;
+static long remains __initdata;
static __initdata char *collect;
static void __init read_into(char *buf, unsigned size, enum state next)
@@ -236,7 +236,7 @@ static int __init do_start(void)
static int __init do_collect(void)
- unsigned n = remains;
+ unsigned long n = remains;
if (count < n)
n = count;
memcpy(collect, victim, n);
@@ -407,7 +407,7 @@ static __initdata int (*actions[])(void) = {
[Reset] = do_reset,
-static int __init write_buffer(char *buf, unsigned len)
+static long __init write_buffer(char *buf, unsigned long len)
count = len;
victim = buf;
@@ -417,11 +417,11 @@ static int __init write_buffer(char *buf, unsigned len)
return len - count;
-static int __init flush_buffer(void *bufv, unsigned len)
+static long __init flush_buffer(void *bufv, unsigned long len)
char *buf = (char *) bufv;
- int written;
- int origLen = len;
+ long written;
+ long origLen = len;
if (message)
return -1;
while ((written = write_buffer(buf, len)) < len && !message) {
@@ -440,13 +440,13 @@ static int __init flush_buffer(void *bufv, unsigned len)
return origLen;
-static unsigned my_inptr; /* index of next byte to be processed in inbuf */
+static unsigned long my_inptr; /* index of next byte to be processed in inbuf */
#include <linux/decompress/generic.h>
-static char * __init unpack_to_rootfs(char *buf, unsigned len)
+static char * __init unpack_to_rootfs(char *buf, unsigned long len)
- int written, res;
+ long written;
decompress_fn decompress;
const char *compress_name;
static __initdata char msg_buf[64];
@@ -480,7 +480,7 @@ static char * __init unpack_to_rootfs(char *buf, unsigned len)
decompress = decompress_method(buf, len, &compress_name);
pr_debug("Detected %s compressed data\n", compress_name);
if (decompress) {
- res = decompress(buf, len, NULL, flush_buffer, NULL,
+ int res = decompress(buf, len, NULL, flush_buffer, NULL,
&my_inptr, error);
if (res)
error("decompressor failed");

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