patch-2.1.32 linux/fs/nfs/nfs3xdr.c

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diff -u --recursive --new-file v2.1.31/linux/fs/nfs/nfs3xdr.c linux/fs/nfs/nfs3xdr.c
@@ -0,0 +1,669 @@
+/*
+ * linux/fs/nfs/nfs2xdr.c
+ *
+ * XDR functions to encode/decode NFSv3 RPC arguments and results.
+ * Note: this is incomplete!
+ *
+ * Copyright (C) 1996 Olaf Kirch
+ */
+
+#define NFS_NEED_XDR_TYPES
+
+#include <linux/param.h>
+#include <linux/sched.h>
+#include <linux/mm.h>
+#include <linux/malloc.h>
+#include <linux/nfs_fs.h>
+#include <linux/utsname.h>
+#include <linux/errno.h>
+#include <linux/string.h>
+#include <linux/in.h>
+#include <linux/pagemap.h>
+#include <linux/proc_fs.h>
+#include <linux/sunrpc/clnt.h>
+
+#ifdef RPC_DEBUG
+# define RPC_FACILITY		RPCDBG_NFS
+#endif
+
+#define QUADLEN(len)		(((len) + 3) >> 2)
+static int			nfs_stat_to_errno(int stat);
+
+/* Mapping from NFS error code to "errno" error code. */
+#define errno_NFSERR_IO		EIO
+
+/*
+ * Declare the space requirements for NFS arguments and replies as
+ * number of 32bit-words
+ */
+#define NFS_fhandle_sz		(1+16)
+#define NFS_sattr_sz		8
+#define NFS_filename_sz		1+(NFS_MAXNAMLEN>>2)
+#define NFS_path_sz		1+(NFS_MAXPATHLEN>>2)
+#define NFS_fattr_sz		17
+#define NFS_info_sz		5
+#define NFS_entry_sz		NFS_filename_sz+3
+
+#define NFS_enc_void_sz		0
+#define NFS_diropargs_sz	NFS_fhandle_sz+NFS_filename_sz
+#define NFS_sattrargs_sz	NFS_fhandle_sz+NFS_sattr_sz
+#define NFS_readargs_sz		NFS_fhandle_sz+3
+#define NFS_writeargs_sz	NFS_fhandle_sz+4
+#define NFS_createargs_sz	NFS_diropargs_sz+NFS_sattr_sz
+#define NFS_renameargs_sz	NFS_diropargs_sz+NFS_diropargs_sz
+#define NFS_linkargs_sz		NFS_fhandle_sz+NFS_diropargs_sz
+#define NFS_symlinkargs_sz	NFS_diropargs_sz+NFS_path_sz+NFS_sattr_sz
+#define NFS_readdirargs_sz	NFS_fhandle_sz+2
+
+#define NFS_dec_void_sz		0
+#define NFS_attrstat_sz		1+NFS_fattr_sz
+#define NFS_diropres_sz		1+NFS_fhandle_sz+NFS_fattr_sz
+#define NFS_readlinkres_sz	1+NFS_path_sz
+#define NFS_readres_sz		1+NFS_fattr_sz+1
+#define NFS_stat_sz		1
+#define NFS_readdirres_sz	1
+#define NFS_statfsres_sz	1+NFS_info_sz
+
+/*
+ * Common NFS XDR functions as inlines
+ */
+static inline u32 *
+xdr_encode_fhandle(u32 *p, struct nfs3_fh *fh)
+{
+	*p++ = htonl(fh->size);
+	memcpy(p, fh->data, fh->size);
+	return p + QUADLEN(fh->size);
+}
+
+static inline u32 *
+xdr_decode_fhandle(u32 *p, struct nfs3_fh *fh)
+{
+	if ((fh->size = ntohl(*p++)) <= NFS3_FHSIZE) {
+		memcpy(fh->data, p, fh->size);
+		return p + QUADLEN(fh->size);
+	}
+	return NULL;
+}
+
+static inline enum nfs_ftype
+xdr_decode_ftype(u32 type)
+{
+	return (type == NF3FIFO)? NFFIFO : (enum nfs_ftype) type;
+}
+
+static inline u32 *
+xdr_decode_string2(u32 *p, char **string, unsigned int *len,
+			unsigned int maxlen)
+{
+	*len = ntohl(*p++);
+	if (*len > maxlen)
+		return NULL;
+	*string = (char *) p;
+	return p + QUADLEN(*len);
+}
+
+static inline u32 *
+xdr_decode_fattr(u32 *p, struct nfs3_fattr *fattr)
+{
+	fattr->type = xdr_decode_ftype(ntohl(*p++));
+	fattr->mode = ntohl(*p++);
+	fattr->nlink = ntohl(*p++);
+	fattr->uid = ntohl(*p++);
+	fattr->gid = ntohl(*p++);
+	fattr->size = ((u64) ntohl(*p++) << 32) | ntohl(*p++);
+	fattr->used = ((u64) ntohl(*p++) << 32) | ntohl(*p++);
+	fattr->rdev_maj = ntohl(*p++);
+	fattr->rdev_min = ntohl(*p++);
+	fattr->fsid = ntohl(*p++);
+	fattr->fileid = ntohl(*p++);
+	fattr->atime.seconds = ntohl(*p++);
+	fattr->atime.useconds = ntohl(*p++);
+	fattr->mtime.seconds = ntohl(*p++);
+	fattr->mtime.useconds = ntohl(*p++);
+	fattr->ctime.seconds = ntohl(*p++);
+	fattr->ctime.useconds = ntohl(*p++);
+	return p;
+}
+
+static inline u32 *
+xdr_encode_sattr(u32 *p, struct nfs_sattr *sattr)
+{
+	*p++ = htonl(sattr->mode);
+	*p++ = htonl(sattr->uid);
+	*p++ = htonl(sattr->gid);
+	*p++ = htonl(sattr->size >> 32);
+	*p++ = htonl(sattr->size & 0xFFFFFFFF);
+	*p++ = htonl(sattr->atime.seconds);
+	*p++ = htonl(sattr->atime.useconds);
+	*p++ = htonl(sattr->mtime.seconds);
+	*p++ = htonl(sattr->mtime.useconds);
+	return p;
+}
+
+/*
+ * NFS encode functions
+ */
+/*
+ * Encode void argument
+ */
+static int
+nfs_xdr_enc_void(struct rpc_rqst *req, u32 *p, void *dummy)
+{
+	req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
+	return 0;
+}
+
+/*
+ * Encode file handle argument
+ * GETATTR, READLINK, STATFS
+ */
+static int
+nfs_xdr_fhandle(struct rpc_rqst *req, u32 *p, struct nfs3_fh *fh)
+{
+	p = xdr_encode_fhandle(p, fh);
+	req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
+	return 0;
+}
+
+/*
+ * Encode SETATTR arguments
+ */
+static int
+nfs_xdr_sattrargs(struct rpc_rqst *req, u32 *p, struct nfs_sattrargs *args)
+{
+	p = xdr_encode_fhandle(p, args->fh);
+	p = xdr_encode_sattr(p, args->sattr);
+	req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
+	return 0;
+}
+
+/*
+ * Encode directory ops argument
+ * LOOKUP, REMOVE, RMDIR
+ */
+static int
+nfs_xdr_diropargs(struct rpc_rqst *req, u32 *p, struct nfs_diropargs *args)
+{
+	p = xdr_encode_fhandle(p, args->fh);
+	p = xdr_encode_string(p, args->name);
+	req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
+	return 0;
+}
+
+/*
+ * Arguments to a READ call. Since we read data directly into the page
+ * cache, we also set up the reply iovec here so that iov[1] points
+ * exactly to the page wewant to fetch.
+ */
+static int
+nfs_xdr_readargs(struct rpc_rqst *req, u32 *p, struct nfs_readargs *args)
+{
+	struct rpc_auth	*auth = req->rq_task->tk_auth;
+	int		replen, buflen;
+
+	p = xdr_encode_fhandle(p, args->fh);
+	*p++ = htonl(args->offset);
+	*p++ = htonl(args->count);
+	*p++ = htonl(args->count);
+	req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
+
+#if 1
+	/* set up reply iovec */
+	replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS_readres_sz) << 2;
+	buflen = req->rq_rvec[0].iov_len;
+	req->rq_rvec[0].iov_len  = replen;
+	req->rq_rvec[1].iov_base = args->buffer;
+	req->rq_rvec[1].iov_len  = args->count;
+	req->rq_rvec[2].iov_base = (u8 *) req->rq_rvec[0].iov_base + replen;
+	req->rq_rvec[2].iov_len  = buflen - replen;
+	req->rq_rlen = args->count + buflen;
+	req->rq_rnr = 3;
+#else
+	replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS_readres_sz) << 2;
+	req->rq_rvec[0].iov_len  = replen;
+#endif
+
+	return 0;
+}
+
+/*
+ * Decode READ reply
+ */
+static int
+nfs_xdr_readres(struct rpc_rqst *req, u32 *p, struct nfs_readres *res)
+{
+	struct iovec *iov = req->rq_rvec;
+	int	status, count, recvd, hdrlen;
+
+	dprintk("RPC:      readres OK status %lx\n", ntohl(*p));
+	if ((status = ntohl(*p++)))
+		return -nfs_stat_to_errno(status);
+	p = xdr_decode_fattr(p, res->fattr);
+
+	count = ntohl(*p++);
+	hdrlen = (u8 *) p - (u8 *) iov->iov_base;
+	recvd = req->rq_rlen - hdrlen;
+	if (p != iov[2].iov_base) {
+		/* Unexpected reply header size. Punt.
+		 * XXX: Move iovec contents to align data on page
+		 * boundary and adjust RPC header size guess */
+		printk("NFS: Odd RPC header size in read reply: %d\n", hdrlen);
+		return -errno_NFSERR_IO;
+	}
+	if (count > recvd) {
+		printk("NFS: server cheating in read reply: "
+			"count %d > recvd %d\n", count, recvd);
+		count = recvd;
+	}
+
+	dprintk("RPC:      readres OK count %d\n", count);
+	if (count < res->count)
+		memset((u8 *)(iov[1].iov_base+count), 0, res->count-count);
+
+	return count;
+}
+
+
+/*
+ * Write arguments. Splice the buffer to be written into the iovec.
+ */
+static int
+nfs_xdr_writeargs(struct rpc_rqst *req, u32 *p, struct nfs_writeargs *args)
+{
+	p = xdr_encode_fhandle(p, args->fh);
+	*p++ = htonl(args->offset);
+	*p++ = htonl(args->offset);
+	*p++ = htonl(args->count);
+	*p++ = htonl(args->count);
+	req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
+
+	req->rq_svec[1].iov_base = (void *) args->buffer;
+	req->rq_svec[1].iov_len = args->count;
+	req->rq_slen += args->count;
+	req->rq_snr = 2;
+
+	return 0;
+}
+
+/*
+ * Encode create arguments
+ * CREATE, MKDIR
+ */
+static int
+nfs_xdr_createargs(struct rpc_rqst *req, u32 *p, struct nfs_createargs *args)
+{
+	p = xdr_encode_fhandle(p, args->fh);
+	p = xdr_encode_string(p, args->name);
+	p = xdr_encode_sattr(p, args->sattr);
+	req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
+	return 0;
+}
+
+/*
+ * Encode RENAME arguments
+ */
+static int
+nfs_xdr_renameargs(struct rpc_rqst *req, u32 *p, struct nfs_renameargs *args)
+{
+	p = xdr_encode_fhandle(p, args->fromfh);
+	p = xdr_encode_string(p, args->fromname);
+	p = xdr_encode_fhandle(p, args->tofh);
+	p = xdr_encode_string(p, args->toname);
+	req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
+	return 0;
+}
+
+/*
+ * Encode LINK arguments
+ */
+static int
+nfs_xdr_linkargs(struct rpc_rqst *req, u32 *p, struct nfs_linkargs *args)
+{
+	p = xdr_encode_fhandle(p, args->fromfh);
+	p = xdr_encode_fhandle(p, args->tofh);
+	p = xdr_encode_string(p, args->toname);
+	req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
+	return 0;
+}
+
+/*
+ * Encode SYMLINK arguments
+ */
+static int
+nfs_xdr_symlinkargs(struct rpc_rqst *req, u32 *p, struct nfs_symlinkargs *args)
+{
+	p = xdr_encode_fhandle(p, args->fromfh);
+	p = xdr_encode_string(p, args->fromname);
+	p = xdr_encode_string(p, args->topath);
+	p = xdr_encode_sattr(p, args->sattr);
+	req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
+	return 0;
+}
+
+/*
+ * Encode arguments to readdir call
+ */
+static int
+nfs_xdr_readdirargs(struct rpc_rqst *req, u32 *p, struct nfs_readdirargs *args)
+{
+	struct rpc_auth	*auth = req->rq_task->tk_auth;
+	int		replen;
+
+	p = xdr_encode_fhandle(p, args->fh);
+	*p++ = htonl(args->cookie);
+	*p++ = htonl(args->bufsiz);
+	req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
+
+	/* set up reply iovec */
+	replen = (RPC_REPHDRSIZE + auth->au_rslack + NFS_readdirres_sz) << 2;
+	/*
+	dprintk("RPC: readdirargs: slack is 4 * (%d + %d + %d) = %d\n",
+		RPC_REPHDRSIZE, auth->au_rslack, NFS_readdirres_sz, replen);
+	 */
+	req->rq_rvec[0].iov_len  = replen;
+	req->rq_rvec[1].iov_base = args->buffer;
+	req->rq_rvec[1].iov_len  = args->bufsiz;
+	req->rq_rlen = replen + args->bufsiz;
+	req->rq_rnr = 2;
+
+	/*
+	dprintk("RPC:      readdirargs set up reply vec:\n");
+	dprintk("          rvec[0] = %p/%d\n",
+			req->rq_rvec[0].iov_base,
+			req->rq_rvec[0].iov_len);
+	dprintk("          rvec[1] = %p/%d\n",
+			req->rq_rvec[1].iov_base,
+			req->rq_rvec[1].iov_len);
+	 */
+
+	return 0;
+}
+
+/*
+ * Decode the result of a readdir call. We decode the result in place
+ * to avoid a malloc of NFS_MAXNAMLEN+1 for each file name.
+ * After decoding, the layout in memory looks like this:
+ *	entry1 entry2 ... entryN <space> stringN ... string2 string1
+ * Note that the strings are not null-terminated so that the entire number
+ * of entries returned by the server should fit into the buffer.
+ */
+static int
+nfs_xdr_readdirres(struct rpc_rqst *req, u32 *p, struct nfs_readdirres *res)
+{
+	struct nfs_entry	*entry;
+	struct iovec		*iov = req->rq_rvec;
+	int			status, nr, len;
+	char			*string;
+	u32			*end;
+
+	if ((status = ntohl(*p++)))
+		return -nfs_stat_to_errno(status);
+	if ((void *) p != ((u8 *) iov->iov_base+iov->iov_len)) {
+		/* Unexpected reply header size. Punt. */
+		printk("NFS: Odd RPC header size in readdirres reply\n");
+		return -errno_NFSERR_IO;
+	}
+
+	p = (u32 *) iov[1].iov_base;
+	end = (u32 *) ((u8 *) p + iov[1].iov_len);
+
+	if (p != res->buffer) {
+		printk("NFS: p != res->buffer in %s:%d!!!\n",
+					__FILE__, __LINE__);
+		return -errno_NFSERR_IO;
+	}
+
+	string = (char *) res->buffer + res->bufsiz;
+	entry = (struct nfs_entry *) res->buffer;
+	for (nr = 0; *p++; nr++, entry++) {
+		entry->fileid = ntohl(*p++);
+
+		len = ntohl(*p++);
+		if ((p + QUADLEN(len) + 3) > end) {
+			printk(KERN_NOTICE
+				"NFS: short packet in readdir reply!\n");
+			break;
+		}
+		if (len > NFS_MAXNAMLEN) {
+			printk("NFS: giant filename in readdir (len %x)!\n",
+						len);
+			return -errno_NFSERR_IO;
+		}
+		string -= len;
+		if ((void *) (entry+1) > (void *) string) {
+			dprintk("NFS: shouldnothappen in readdirres_decode!\n");
+			break;	/* should not happen */
+		}
+
+		entry->name = string;
+		entry->length = len;
+		memmove(string, p, len);
+		p += QUADLEN(len);
+		entry->cookie = ntohl(*p++);
+		entry->eof = !p[0] && p[1];
+		/*
+		dprintk("NFS: decoded dirent %.*s cookie %d eof %d\n",
+			len, string, entry->cookie, entry->eof);
+		 */
+	}
+	return nr;
+}
+
+/*
+ * NFS XDR decode functions
+ */
+/*
+ * Decode void reply
+ */
+static int
+nfs_xdr_dec_void(struct rpc_rqst *req, u32 *p, void *dummy)
+{
+	return 0;
+}
+
+/*
+ * Decode simple status reply
+ */
+static int
+nfs_xdr_stat(struct rpc_rqst *req, u32 *p, void *dummy)
+{
+	int	status;
+
+	if ((status = ntohl(*p++)) != 0)
+		status = -nfs_stat_to_errno(status);
+	return status;
+}
+
+/*
+ * Decode attrstat reply
+ * GETATTR, SETATTR, WRITE
+ */
+static int
+nfs_xdr_attrstat(struct rpc_rqst *req, u32 *p, struct nfs_fattr *fattr)
+{
+	int	status;
+
+	dprintk("RPC:      attrstat status %lx\n", ntohl(*p));
+	if ((status = ntohl(*p++)))
+		return -nfs_stat_to_errno(status);
+	xdr_decode_fattr(p, fattr);
+	dprintk("RPC:      attrstat OK type %d mode %o dev %x ino %x\n",
+		fattr->type, fattr->mode, fattr->fsid, fattr->fileid);
+	return 0;
+}
+
+/*
+ * Decode diropres reply
+ * LOOKUP, CREATE, MKDIR
+ */
+static int
+nfs_xdr_diropres(struct rpc_rqst *req, u32 *p, struct nfs_diropok *res)
+{
+	int	status;
+
+	dprintk("RPC:      diropres status %lx\n", ntohl(*p));
+	if ((status = ntohl(*p++)))
+		return -nfs_stat_to_errno(status);
+	p = xdr_decode_fhandle(p, res->fh);
+	xdr_decode_fattr(p, res->fattr);
+	dprintk("RPC:      diropres OK type %x mode %o dev %x ino %x\n",
+		res->fattr->type, res->fattr->mode,
+		res->fattr->fsid, res->fattr->fileid);
+	return 0;
+}
+
+/*
+ * Decode READLINK reply
+ */
+static int
+nfs_xdr_readlinkres(struct rpc_rqst *req, u32 *p, struct nfs_readlinkres *res)
+{
+	int	status;
+
+	if ((status = ntohl(*p++)))
+		return -nfs_stat_to_errno(status);
+	xdr_decode_string2(p, res->string, res->lenp, res->maxlen);
+
+	/* Caller takes over the buffer here to avoid extra copy */
+	res->buffer = req->rq_task->tk_buffer;
+	req->rq_task->tk_buffer = NULL;
+	return 0;
+}
+
+/*
+ * Decode STATFS reply
+ */
+static int
+nfs_xdr_statfsres(struct rpc_rqst *req, u32 *p, struct nfs_fsinfo *res)
+{
+	int	status;
+
+	if ((status = ntohl(*p++)))
+		return -nfs_stat_to_errno(status);
+	res->tsize = ntohl(*p++);
+	res->bsize = ntohl(*p++);
+	res->blocks = ntohl(*p++);
+	res->bfree = ntohl(*p++);
+	res->bavail = ntohl(*p++);
+	return 0;
+}
+
+/*
+ * We need to translate between nfs status return values and
+ * the local errno values which may not be the same.
+ */
+static struct {
+	int stat;
+	int errno;
+} nfs_errtbl[] = {
+	{ NFS_OK,		0		},
+	{ NFSERR_PERM,		EPERM		},
+	{ NFSERR_NOENT,		ENOENT		},
+	{ NFSERR_IO,		errno_NFSERR_IO	},
+	{ NFSERR_NXIO,		ENXIO		},
+	{ NFSERR_EAGAIN,	EAGAIN		},
+	{ NFSERR_ACCES,		EACCES		},
+	{ NFSERR_EXIST,		EEXIST		},
+	{ NFSERR_NODEV,		ENODEV		},
+	{ NFSERR_NOTDIR,	ENOTDIR		},
+	{ NFSERR_ISDIR,		EISDIR		},
+	{ NFSERR_INVAL,		EINVAL		},
+	{ NFSERR_FBIG,		EFBIG		},
+	{ NFSERR_NOSPC,		ENOSPC		},
+	{ NFSERR_ROFS,		EROFS		},
+	{ NFSERR_NAMETOOLONG,	ENAMETOOLONG	},
+	{ NFSERR_NOTEMPTY,	ENOTEMPTY	},
+	{ NFSERR_DQUOT,		EDQUOT		},
+	{ NFSERR_STALE,		ESTALE		},
+#ifdef EWFLUSH
+	{ NFSERR_WFLUSH,	EWFLUSH		},
+#endif
+	{ -1,			EIO		}
+};
+
+static int
+nfs_stat_to_errno(int stat)
+{
+	int i;
+
+	for (i = 0; nfs_errtbl[i].stat != -1; i++) {
+		if (nfs_errtbl[i].stat == stat)
+			return nfs_errtbl[i].errno;
+	}
+	printk("nfs_stat_to_errno: bad nfs status return value: %d\n", stat);
+	return nfs_errtbl[i].errno;
+}
+
+#ifndef MAX
+# define MAX(a, b)	(((a) > (b))? (a) : (b))
+#endif
+
+#define PROC(proc, argtype, restype)	\
+    { "nfs_" #proc,					\
+      (kxdrproc_t) nfs_xdr_##argtype,			\
+      (kxdrproc_t) nfs_xdr_##restype,			\
+      MAX(NFS_##argtype##_sz,NFS_##restype##_sz) << 2	\
+    }
+
+static struct rpc_procinfo	nfs_procedures[18] = {
+    PROC(null,		enc_void,	dec_void),
+    PROC(getattr,	fhandle,	attrstat),
+    PROC(setattr,	sattrargs,	attrstat),
+    PROC(root,		enc_void,	dec_void),
+    PROC(lookup,	diropargs,	diropres),
+    PROC(readlink,	fhandle,	readlinkres),
+    PROC(read,		readargs,	readres),
+    PROC(writecache,	enc_void,	dec_void),
+    PROC(write,		writeargs,	attrstat),
+    PROC(create,	createargs,	diropres),
+    PROC(remove,	diropargs,	stat),
+    PROC(rename,	renameargs,	stat),
+    PROC(link,		linkargs,	stat),
+    PROC(symlink,	symlinkargs,	stat),
+    PROC(mkdir,		createargs,	diropres),
+    PROC(rmdir,		diropargs,	stat),
+    PROC(readdir,	readdirargs,	readdirres),
+    PROC(statfs,	fhandle,	statfsres),
+};
+
+static struct rpc_version	nfs_version2 = {
+	2,
+	sizeof(nfs_procedures)/sizeof(nfs_procedures[0]),
+	nfs_procedures
+};
+
+static struct rpc_version *	nfs_version[] = {
+	NULL,
+	NULL,
+	&nfs_version2
+};
+
+struct rpc_program	nfs_program = {
+	"nfs",
+	NFS_PROGRAM,
+	sizeof(nfs_version) / sizeof(nfs_version[0]),
+	nfs_version,
+	&nfs_rpcstat,
+};
+
+/*
+ * RPC stats support
+ */
+static int
+nfs_get_info(char *buffer, char **start, off_t offset, int length, int dummy)
+{
+	return rpcstat_get_info(&nfs_rpcstat, buffer, start, offset, length);
+}
+
+static struct proc_dir_entry	proc_nfsclnt = {
+	0, 3, "nfs",
+	S_IFREG | S_IRUGO, 1, 0, 0,
+	6, &proc_net_inode_operations,
+	nfs_get_info
+};
+
+struct rpc_stat			nfs_rpcstat = {
+	NULL,			/* next */
+	&proc_nfsclnt,		/* /proc/net directory entry */
+	&nfs_program,		/* RPC program */
+};

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TCL-scripts by Sam Shen, slshen@lbl.gov