#include <linux/slab.h>
#include <linux/compat.h>
#include <linux/freezer.h>
+#include <linux/crc32.h>
#include <asm/system.h>
#include <asm/uaccess.h>
return fh;
}
-/**
+#ifdef RPC_DEBUG
+/*
+ * _nfs_display_fhandle_hash - calculate the crc32 hash for the filehandle
+ * in the same way that wireshark does
+ *
+ * @fh: file handle
+ *
+ * For debugging only.
+ */
+u32 _nfs_display_fhandle_hash(const struct nfs_fh *fh)
+{
+ /* wireshark uses 32-bit AUTODIN crc and does a bitwise
+ * not on the result */
+ return ~crc32(0xFFFFFFFF, &fh->data[0], fh->size);
+}
+
+/*
* _nfs_display_fhandle - display an NFS file handle on the console
*
* @fh: file handle to display
*
* For debugging only.
*/
-#ifdef RPC_DEBUG
void _nfs_display_fhandle(const struct nfs_fh *fh, const char *caption)
{
unsigned short i;
return;
}
- printk(KERN_DEFAULT "%s at %p is %u bytes:\n", caption, fh, fh->size);
+ printk(KERN_DEFAULT "%s at %p is %u bytes, crc: 0x%08x:\n",
+ caption, fh, fh->size, _nfs_display_fhandle_hash(fh));
for (i = 0; i < fh->size; i += 16) {
__be32 *pos = (__be32 *)&fh->data[i];
}
#ifdef RPC_DEBUG
+extern u32 _nfs_display_fhandle_hash(const struct nfs_fh *fh);
+static inline u32 nfs_display_fhandle_hash(const struct nfs_fh *fh)
+{
+ return _nfs_display_fhandle_hash(fh);
+}
extern void _nfs_display_fhandle(const struct nfs_fh *fh, const char *caption);
#define nfs_display_fhandle(fh, caption) \
do { \
_nfs_display_fhandle(fh, caption); \
} while (0)
#else
+static inline u32 nfs_display_fhandle_hash(const struct nfs_fh *fh)
+{
+}
static inline void nfs_display_fhandle(const struct nfs_fh *fh,
const char *caption)
{