Linux Kernel  3.7.1
 All Data Structures Namespaces Files Functions Variables Typedefs Enumerations Enumerator Macros Groups Pages
nfs.h
Go to the documentation of this file.
1 /*
2  * NFS protocol definitions
3  *
4  * This file contains constants mostly for Version 2 of the protocol,
5  * but also has a couple of NFSv3 bits in (notably the error codes).
6  */
7 #ifndef _LINUX_NFS_H
8 #define _LINUX_NFS_H
9 
10 #include <linux/sunrpc/msg_prot.h>
11 #include <linux/string.h>
12 #include <uapi/linux/nfs.h>
13 
14 /*
15  * This is the kernel NFS client file handle representation
16  */
17 #define NFS_MAXFHSIZE 128
18 struct nfs_fh {
19  unsigned short size;
20  unsigned char data[NFS_MAXFHSIZE];
21 };
22 
23 /*
24  * Returns a zero iff the size and data fields match.
25  * Checks only "size" bytes in the data field.
26  */
27 static inline int nfs_compare_fh(const struct nfs_fh *a, const struct nfs_fh *b)
28 {
29  return a->size != b->size || memcmp(a->data, b->data, a->size) != 0;
30 }
31 
32 static inline void nfs_copy_fh(struct nfs_fh *target, const struct nfs_fh *source)
33 {
34  target->size = source->size;
35  memcpy(target->data, source->data, source->size);
36 }
37 
38 
39 /*
40  * This is really a general kernel constant, but since nothing like
41  * this is defined in the kernel headers, I have to do it here.
42  */
43 #define NFS_OFFSET_MAX ((__s64)((~(__u64)0) >> 1))
44 
45 
50 };
51 #endif /* _LINUX_NFS_H */