From d268fe24fff8366160c911ba5ec11ba5401631a5 Mon Sep 17 00:00:00 2001
From: Alan Cox <alan@linux.intel.com>
Date: Sun, 14 Dec 2014 22:09:16 +0000
Subject: [PATCH] fsck: bug fixes for big endian fsck on small endian box

Also change misc because a signed 16bit value swizzled gets 32bit extended
which tripped the sanity checker wrongly
---
 Standalone/fsck.c | 14 +++++++-------
 Standalone/util.c |  3 ++-
 2 files changed, 9 insertions(+), 8 deletions(-)

diff --git a/Standalone/fsck.c b/Standalone/fsck.c
index dbf3a018..379b02db 100644
--- a/Standalone/fsck.c
+++ b/Standalone/fsck.c
@@ -128,7 +128,7 @@ void pass1(void)
         if (ino.i_mode == 0)
             continue;
 
-        mode = swizzle16(ino.i_mode & F_MASK);
+        mode = swizzle16(ino.i_mode) & F_MASK;
         /* FIXME: named pipes.. */
 
         /* Check mode */
@@ -146,9 +146,9 @@ void pass1(void)
         ++icount;
         /* Check size */
 
-        if (swizzle16(ino.i_size) < 0) {
+        if (swizzle32(ino.i_size) < 0) {
             printf("Inode %d offset is negative with value of %ld. Fix? ",
-                    n, (long)ino.i_size);
+                    n, (long)swizzle32(ino.i_size));
             if (yes()) {
                 ino.i_size = 0;
                 iwrite(n, &ino);
@@ -163,15 +163,15 @@ void pass1(void)
                     (swizzle16(ino.i_addr[b]) < swizzle16(superblock.s_isize) ||
                             swizzle16(ino.i_addr[b]) >= swizzle16(superblock.s_fsize))) {
                     printf("Inode %d singly ind. blk %d out of range, val = %u. Zap? ",
-                            n, b, ino.i_addr[b]);
+                            n, b, swizzle16(ino.i_addr[b]));
                     if (yes()) {
                         ino.i_addr[b] = 0;
                         iwrite(n, &ino);
                     }
                 }
-                if (ino.i_addr[b] != 0 && swizzle16(ino.i_size) < 18*512) {
+                if (ino.i_addr[b] != 0 && swizzle32(ino.i_size) < 18*512) {
                     printf("Inode %d singly ind. blk %d past end of file, val = %u. Zap? ",
-                            n, b, ino.i_addr[b]);
+                            n, b, swizzle16(ino.i_addr[b]));
                     if (yes()) {
                         ino.i_addr[b] = 0;
                         iwrite(n, &ino);
@@ -200,7 +200,7 @@ void pass1(void)
                 }
             }
             /* Check the rest */
-            for (bno = 0; bno <= swizzle16(ino.i_size)/512; ++bno) {
+            for (bno = 0; bno <= swizzle32(ino.i_size)/512; ++bno) {
                 b = getblkno(&ino, bno);
 
                 if (b != 0 && (b < swizzle16(superblock.s_isize) || b >= swizzle16(superblock.s_fsize))) {
diff --git a/Standalone/util.c b/Standalone/util.c
index d6d48bce..5e820310 100644
--- a/Standalone/util.c
+++ b/Standalone/util.c
@@ -48,7 +48,8 @@ void panic(char *s)
 
 uint16_t swizzle16(uint32_t v)
 {
-	if (v & 0xFFFF0000UL) {
+        int top = v & 0xFFFF0000UL;
+	if (top && top != 0xFFFF0000) {
 		fprintf(stderr, "swizzle16 given a 32bit input\n");
 		exit(1);
 	}
-- 
2.34.1