[uml-devel] patch for mounting large COW filesystems

[Derrick M. <dm...@ya...>]

Hello,

I encountered a problem trying to mount a 4GB COW
filesystem with user mode Linux.  I tracked down the
problem and was able to fix it.  Enjoy. :-)

Cheers,
Derrick Moser

--- arch/um/drivers/ubd_user.c.org	2003-03-04
21:51:32.000000000 -0600
+++ arch/um/drivers/ubd_user.c	2003-03-04
21:52:11.000000000 -0600
@@ -149,17 +149,17 @@
 
 static int same_backing_files(char *from_cmdline,
char *from_cow, char *cow)
 {
-	struct stat buf1, buf2;
+	struct stat64 buf1, buf2;
 
 	if(from_cmdline == NULL) return(1);
 	if(!strcmp(from_cmdline, from_cow)) return(1);
 
-	if(stat(from_cmdline, &buf1) < 0){
+	if(stat64(from_cmdline, &buf1) < 0){
 		printk("Couldn't stat '%s', errno = %d\n",
from_cmdline, 
 		       errno);
 		return(1);
 	}
-	if(stat(from_cow, &buf2) < 0){
+	if(stat64(from_cow, &buf2) < 0){
 		printk("Couldn't stat '%s', errno = %d\n",
from_cow, errno);
 		return(1);
 	}
--- arch/um/kernel/mem_user.c.org	2003-03-04
21:56:03.000000000 -0600
+++ arch/um/kernel/mem_user.c	2003-03-04
21:56:31.000000000 -0600
@@ -122,7 +122,7 @@
 
 static int __init parse_iomem(char *str, int *add)
 {
-	struct stat buf;
+	struct stat64 buf;
 	char *file, *driver;
 	int fd;
 
@@ -140,7 +140,7 @@
 		       errno);
 		return(1);
 	}
-	if(fstat(fd, &buf) < 0) {
+	if(fstat64(fd, &buf) < 0) {
 		printf("parse_iomem - cannot fstat file, errno =
%d\n", errno);
 		return(1);
 	}


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