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(try3-resend) Fix nfs_compat_user_ino64 so it doesn't cause problems if bit 31 or 63 are set in fileid

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The problem was use of an int32, which when converted to a uint64
is sign extended resulting in a fileid that doesn't fit in 32 bits
even though the intent of the function is to fit the fileid into
32 bits.

Signed-off-by: Frank Filz <ffilzlnx@us.ibm.com>
Reviewed-by: Jeff Layton <jlayton@redhat.com>
[Trond: Added an include for compat.h]
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Frank Filz 2010-12-02 19:31:23 +00:00 committed by Trond Myklebust
parent 43b7c3f051
commit 3fa0b4e201
1 changed files with 6 additions and 1 deletions
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7
fs/nfs/inode.c
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@ -37,6 +37,7 @@
#include <linux/inet.h>
#include <linux/nfs_xdr.h>
#include <linux/slab.h>
#include <linux/compat.h>
#include <asm/system.h>
#include <asm/uaccess.h>
@ -89,7 +90,11 @@ int nfs_wait_bit_killable(void *word)
*/
u64 nfs_compat_user_ino64(u64 fileid)
{
int ino;
#ifdef CONFIG_COMPAT
compat_ulong_t ino;
#else
unsigned long ino;
#endif
if (enable_ino64)
return fileid;