1 files changed, 70 insertions, 0 deletions

diff --git a/fs/nfs/callback.h b/fs/nfs/callback.h
new file mode 100644
index 000000000000..a0db2d4f9415
--- /dev/null
+++ b/fs/nfs/callback.h
@@ -0,0 +1,70 @@
+/*
+ * linux/fs/nfs/callback.h
+ *
+ * Copyright (C) 2004 Trond Myklebust
+ *
+ * NFSv4 callback definitions
+ */
+#ifndef __LINUX_FS_NFS_CALLBACK_H
+#define __LINUX_FS_NFS_CALLBACK_H
+
+#define NFS4_CALLBACK 0x40000000
+#define NFS4_CALLBACK_XDRSIZE 2048
+#define NFS4_CALLBACK_BUFSIZE (1024 + NFS4_CALLBACK_XDRSIZE)
+
+enum nfs4_callback_procnum {
+        CB_NULL = 0,
+        CB_COMPOUND = 1,
+};
+
+enum nfs4_callback_opnum {
+        OP_CB_GETATTR = 3,
+        OP_CB_RECALL  = 4,
+        OP_CB_ILLEGAL = 10044,
+};
+
+struct cb_compound_hdr_arg {
+        int taglen;
+        const char *tag;
+        unsigned int callback_ident;
+        unsigned nops;
+};
+
+struct cb_compound_hdr_res {
+        uint32_t *status;
+        int taglen;
+        const char *tag;
+        uint32_t *nops;
+};
+
+struct cb_getattrargs {
+        struct sockaddr_in *addr;
+        struct nfs_fh fh;
+        uint32_t bitmap[2];
+};
+
+struct cb_getattrres {
+        uint32_t status;
+        uint32_t bitmap[2];
+        uint64_t size;
+        uint64_t change_attr;
+        struct timespec ctime;
+        struct timespec mtime;
+};
+
+struct cb_recallargs {
+        struct sockaddr_in *addr;
+        struct nfs_fh fh;
+        nfs4_stateid stateid;
+        uint32_t truncate;
+};
+
+extern unsigned nfs4_callback_getattr(struct cb_getattrargs *args, struct cb_getattrres *res);
+extern unsigned nfs4_callback_recall(struct cb_recallargs *args, void *dummy);
+
+extern int nfs_callback_up(void);
+extern int nfs_callback_down(void);
+
+extern unsigned short nfs_callback_tcpport;
+
+#endif /* __LINUX_FS_NFS_CALLBACK_H */