Import of Linux/MIPS 2.1.36

1 files changed, 169 insertions, 914 deletions

diff --git a/fs/nfs/proc.c b/fs/nfs/proc.c
index ff71bd631..714101bb7 100644
--- a/fs/nfs/proc.c
+++ b/fs/nfs/proc.c
@@ -21,1017 +21,272 @@
  *  it decodes the packet.
  *
  *  Feel free to fix it and mail me the diffs if it worries you.
+ *
+ *  Completely rewritten to support the new RPC call interface;
+ *  rewrote and moved the entire XDR stuff to xdr.c
+ *  --Olaf Kirch June 1996
  */
 
-/*
- * Defining NFS_PROC_DEBUG causes a lookup of a file named
- * "xyzzy" to toggle debugging.  Just cd to an NFS-mounted
- * filesystem and type 'ls xyzzy' to turn on debugging.
- */
-
-#if 0
-#define NFS_PROC_DEBUG
-#endif
+#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/sunrpc/clnt.h>
+#include <linux/nfs_fs.h>
 
-#include <asm/uaccess.h>
-
-#ifdef NFS_PROC_DEBUG
-
-static int proc_debug = 0;
-#define PRINTK(format, args...) \
-	do {						\
-		if (proc_debug)				\
-			printk(format , ## args);	\
-	} while (0)
-
-#else /* !NFS_PROC_DEBUG */
-
-#define PRINTK(format, args...) do ; while (0)
-
-#endif /* !NFS_PROC_DEBUG */
-
-/* Mapping from NFS error code to "errno" error code. */
-#define errno_NFSERR_IO EIO
-
-static int *nfs_rpc_header(int *p, int procedure, int ruid);
-static int *nfs_rpc_verify(int *p);
-static int nfs_stat_to_errno(int stat);
-
-/*
- * Our memory allocation and release functions.
- */
- 
-#define NFS_SLACK_SPACE		1024	/* Total overkill */ 
-/* !!! Be careful, this constant is now also used in sock.c...
-   We should easily convert to not using it anymore for most cases... */
-
-static inline int *nfs_rpc_alloc(int size)
-{
-	int *i;
-
-	while (!(i = (int *)kmalloc(size+NFS_SLACK_SPACE,GFP_NFS))) {
-		schedule();
-	}
-	return i;
-}
-
-static inline void nfs_rpc_free(int *p)
-{
-	kfree((void *)p);
-}
+#include <asm/segment.h>
 
 /*
- * Here are a bunch of xdr encode/decode functions that convert
- * between machine dependent and xdr data formats.
+ * If NFS_DEBUG is defined, you can toggle NFS debugging by causing
+ * a lookup of "xyzzy". Just cd to an NFS-mounted filesystem and type
+ * 'ls xyzzy' to turn on debugging.
  */
+#ifdef NFS_DEBUG
+# define NFSDBG_FACILITY	NFSDBG_PROC
+#endif
 
-#define QUADLEN(len) (((len) + 3) >> 2)
-
-static inline int *xdr_encode_fhandle(int *p, struct nfs_fh *fhandle)
-{
-	*((struct nfs_fh *) p) = *fhandle;
-	return p + QUADLEN(sizeof(*fhandle));
-}
-
-static inline int *xdr_decode_fhandle(int *p, struct nfs_fh *fhandle)
-{
-	*fhandle = *((struct nfs_fh *) p);
-	return p + QUADLEN(sizeof(*fhandle));
-}
-
-static inline int *xdr_encode_string(int *p, const char *string)
-{
-	int len = strlen(string);
-	int quadlen = QUADLEN(len);
-
-	p[quadlen] = 0;
-	*p++ = htonl(len);
-	memcpy(p, string, len);
-	return p + quadlen;
-}
-
-static inline int *xdr_decode_string(int *p, char *string, unsigned int maxlen)
-{
-	unsigned int len = ntohl(*p++);
-	if (len > maxlen)
-		return NULL;
-	memcpy(string, p, len);
-	string[len] = '\0';
-	return p + QUADLEN(len);
-}
-
-static inline int *xdr_decode_string2(int *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 int *xdr_encode_data(int *p, const char *data, int len)
-{
-	int quadlen = QUADLEN(len);
-	
-	p[quadlen] = 0;
-	*p++ = htonl(len);
-	copy_from_user(p, data, len);
-	return p + quadlen;
-}
-
-static inline int *xdr_decode_data(int *p, char *data, int *lenp, int maxlen)
-{
-	unsigned len = *lenp = ntohl(*p++);
-	if (len > maxlen)
-		return NULL;
-	memcpy(data, p, len);
-	return p + QUADLEN(len);
-}
-
-static int *xdr_decode_fattr(int *p, struct nfs_fattr *fattr)
-{
-	fattr->type = (enum nfs_ftype) ntohl(*p++);
-	fattr->mode = ntohl(*p++);
-	fattr->nlink = ntohl(*p++);
-	fattr->uid = ntohl(*p++);
-	fattr->gid = ntohl(*p++);
-	fattr->size = ntohl(*p++);
-	fattr->blocksize = ntohl(*p++);
-	fattr->rdev = ntohl(*p++);
-	fattr->blocks = 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 int *xdr_encode_sattr(int *p, struct nfs_sattr *sattr)
-{
-	*p++ = htonl(sattr->mode);
-	*p++ = htonl(sattr->uid);
-	*p++ = htonl(sattr->gid);
-	*p++ = htonl(sattr->size);
-	*p++ = htonl(sattr->atime.seconds);
-	*p++ = htonl(sattr->atime.useconds);
-	*p++ = htonl(sattr->mtime.seconds);
-	*p++ = htonl(sattr->mtime.useconds);
-	return p;
-}
-
-static int *xdr_decode_entry(int *p, struct nfs_entry *entry)
-{
-	entry->fileid = ntohl(*p++);
-	if (!(p = xdr_decode_string(p, entry->name, NFS_MAXNAMLEN)))
-		return NULL;
-	entry->cookie = ntohl(*p++);
-	entry->eof = 0;
-	return p;
-}
-
-static int *xdr_decode_fsinfo(int *p, struct nfs_fsinfo *res)
-{
-	res->tsize = ntohl(*p++);
-	res->bsize = ntohl(*p++);
-	res->blocks = ntohl(*p++);
-	res->bfree = ntohl(*p++);
-	res->bavail = ntohl(*p++);
-	return p;
-}
 
 /*
  * One function for each procedure in the NFS protocol.
  */
-
-int nfs_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
-		     struct nfs_fattr *fattr)
+int
+nfs_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
+			struct nfs_fattr *fattr)
 {
-	int *p, *p0;
-	int status;
-	int ruid = 0;
+	int	status;
 
-	PRINTK("NFS call  getattr\n");
-	if (!(p0 = nfs_rpc_alloc(server->rsize)))
-		return -EIO;
-retry:
-	p = nfs_rpc_header(p0, NFSPROC_GETATTR, ruid);
-	p = xdr_encode_fhandle(p, fhandle);
-	if ((status = nfs_rpc_call(server, p0, p, server->rsize)) < 0) {
-		nfs_rpc_free(p0);
-		return status;
-	}
-	if (!(p = nfs_rpc_verify(p0)))
-		status = -errno_NFSERR_IO;
-	else if ((status = ntohl(*p++)) == NFS_OK) {
-		p = xdr_decode_fattr(p, fattr);
-		PRINTK("NFS reply getattr\n");
-		/* status = 0; */
-	}
-	else {
-		if (!ruid && current->fsuid == 0 && current->uid != 0) {
-			ruid = 1;
-			goto retry;
-		}
-		PRINTK("NFS reply getattr failed = %d\n", status);
-		status = -nfs_stat_to_errno(status);
-	}
-	nfs_rpc_free(p0);
+	dprintk("NFS call  getattr\n");
+	status = rpc_call(server->client, NFSPROC_GETATTR, fhandle, fattr, 0);
+	dprintk("NFS reply getattr\n");
 	return status;
 }
 
-int nfs_proc_setattr(struct nfs_server *server, struct nfs_fh *fhandle,
-		     struct nfs_sattr *sattr, struct nfs_fattr *fattr)
+int
+nfs_proc_setattr(struct nfs_server *server, struct nfs_fh *fhandle,
+			struct nfs_sattr *sattr, struct nfs_fattr *fattr)
 {
-	int *p, *p0;
-	int status;
-	int ruid = 0;
+	struct nfs_sattrargs	arg = { fhandle, sattr };
+	int	status;
 
-	PRINTK("NFS call  setattr\n");
-	if (!(p0 = nfs_rpc_alloc(server->wsize)))
-		return -EIO;
-retry:
-	p = nfs_rpc_header(p0, NFSPROC_SETATTR, ruid);
-	p = xdr_encode_fhandle(p, fhandle);
-	p = xdr_encode_sattr(p, sattr);
-	if ((status = nfs_rpc_call(server, p0, p, server->wsize)) < 0) {
-		nfs_rpc_free(p0);
-		return status;
-	}
-	if (!(p = nfs_rpc_verify(p0)))
-		status = -errno_NFSERR_IO;
-	else if ((status = ntohl(*p++)) == NFS_OK) {
-		p = xdr_decode_fattr(p, fattr);
-		PRINTK("NFS reply setattr\n");
-		/* status = 0; */
-	}
-	else {
-		if (!ruid && current->fsuid == 0 && current->uid != 0) {
-			ruid = 1;
-			goto retry;
-		}
-		PRINTK("NFS reply setattr failed = %d\n", status);
-		status = -nfs_stat_to_errno(status);
-	}
-	nfs_rpc_free(p0);
+	dprintk("NFS call  setattr\n");
+	status = rpc_call(server->client, NFSPROC_SETATTR, &arg, fattr, 0);
+	dprintk("NFS reply setattr\n");
 	return status;
 }
 
-int nfs_proc_lookup(struct nfs_server *server, struct nfs_fh *dir, const char *name,
+int
+nfs_proc_lookup(struct nfs_server *server, struct nfs_fh *dir, const char *name,
 		    struct nfs_fh *fhandle, struct nfs_fattr *fattr)
 {
-	int *p, *p0;
-	int status;
-	int ruid = 0;
+	struct nfs_diropargs	arg = { dir, name };
+	struct nfs_diropok	res = { fhandle, fattr };
+	int			status;
 
-	PRINTK("NFS call  lookup %s\n", name);
-#ifdef NFS_PROC_DEBUG
+	dprintk("NFS call  lookup %s\n", name);
+#ifdef RPC_DEBUG
 	if (!strcmp(name, "xyzzy"))
-		proc_debug = 1 - proc_debug;
+		nfs_debug = ~nfs_debug;
 #endif
-	if (!(p0 = nfs_rpc_alloc(server->rsize)))
-		return -EIO;
-retry:
-	p = nfs_rpc_header(p0, NFSPROC_LOOKUP, ruid);
-	p = xdr_encode_fhandle(p, dir);
-	p = xdr_encode_string(p, name);
-	if ((status = nfs_rpc_call(server, p0, p, server->rsize)) < 0) {
-		nfs_rpc_free(p0);
-		return status;
-	}
-	if (!(p = nfs_rpc_verify(p0)))
-		status = -errno_NFSERR_IO;
-	else if ((status = ntohl(*p++)) == NFS_OK) {
-		p = xdr_decode_fhandle(p, fhandle);
-		p = xdr_decode_fattr(p, fattr);
-		PRINTK("NFS reply lookup\n");
-		/* status = 0; */
-	}
-	else {
-		if (!ruid && current->fsuid == 0 && current->uid != 0) {
-			ruid = 1;
-			goto retry;
-		}
-		PRINTK("NFS reply lookup failed = %d\n", status);
-		status = -nfs_stat_to_errno(status);
-	}
-	nfs_rpc_free(p0);
+	status = rpc_call(server->client, NFSPROC_LOOKUP, &arg, &res, 0);
+	dprintk("NFS reply lookup: %d\n", status);
 	return status;
 }
 
-int nfs_proc_readlink(struct nfs_server *server, struct nfs_fh *fhandle,
-		int **p0, char **string, unsigned int *len, unsigned int maxlen)
+int
+nfs_proc_readlink(struct nfs_server *server, struct nfs_fh *fhandle,
+			void **p0, char **string, unsigned int *len,
+			unsigned int maxlen)
 {
-	int *p;
-	int status, ruid = 0;
+	struct nfs_readlinkres	res = { string, len, maxlen, NULL };
+	int			status;
 
-	PRINTK("NFS call  readlink\n");
-	if (!(*p0 = nfs_rpc_alloc(server->rsize)))
-		return -EIO;
-retry:
-	p = nfs_rpc_header(*p0, NFSPROC_READLINK, ruid);
-	p = xdr_encode_fhandle(p, fhandle);
-	if ((status = nfs_rpc_call(server, *p0, p, server->rsize)) < 0)
-		return status;
-	if (!(p = nfs_rpc_verify(*p0)))
-		status = -errno_NFSERR_IO;
-	else if ((status = ntohl(*p++)) == NFS_OK) {
-		if (!(p = xdr_decode_string2(p, string, len, maxlen))) {
-			printk("nfs_proc_readlink: giant pathname\n");
-			status = -errno_NFSERR_IO;
-		}
-		else	/* status = 0, */
-			PRINTK("NFS reply readlink\n");
-	}
-	else {
-		if (!ruid && current->fsuid == 0 && current->uid != 0) {
-			ruid = 1;
-			goto retry;
-		}
-		PRINTK("NFS reply readlink failed = %d\n", status);
-		status = -nfs_stat_to_errno(status);
-	}
+	dprintk("NFS call  readlink\n");
+	status = rpc_call(server->client, NFSPROC_READLINK, fhandle, &res, 0);
+	dprintk("NFS reply readlink: %d\n", status);
+	if (!status)
+		*p0 = res.buffer;
+	else if (res.buffer)
+		kfree(res.buffer);
 	return status;
 }
 
-int nfs_proc_read(struct nfs_server *server, struct nfs_fh *fhandle,
-	  int offset, int count, char *data, struct nfs_fattr *fattr)
-{
-	int *p, *p0;
-	int status;
-	int ruid = 0;
-	int len;
-
-	PRINTK("NFS call  read %d @ %d\n", count, offset);
-	if (!(p0 = nfs_rpc_alloc(server->rsize)))
-		return -EIO;
-retry:
-	p = nfs_rpc_header(p0, NFSPROC_READ, ruid);
-	p = xdr_encode_fhandle(p, fhandle);
-	*p++ = htonl(offset);
-	*p++ = htonl(count);
-	*p++ = htonl(count); /* traditional, could be any value */
-	if ((status = nfs_rpc_call(server, p0, p, server->rsize)) < 0) {
-		nfs_rpc_free(p0);
-		return status;
-	}
-	if (!(p = nfs_rpc_verify(p0)))
-		status = -errno_NFSERR_IO;
-	else if ((status = ntohl(*p++)) == NFS_OK) {
-		p = xdr_decode_fattr(p, fattr);
-		if (!(p = xdr_decode_data(p, data, &len, count))) {
-			printk("nfs_proc_read: giant data size\n"); 
-			status = -errno_NFSERR_IO;
-		}
-		else {
-			status = len;
-			PRINTK("NFS reply read %d\n", len);
-		}
-	}
-	else {
-		if (!ruid && current->fsuid == 0 && current->uid != 0) {
-			ruid = 1;
-			goto retry;
-		}
-		PRINTK("NFS reply read failed = %d\n", status);
-		status = -nfs_stat_to_errno(status);
-	}
-	nfs_rpc_free(p0);
+int
+nfs_proc_read(struct nfs_server *server, struct nfs_fh *fhandle, int swap,
+			  unsigned long offset, unsigned int count,
+			  void *buffer, struct nfs_fattr *fattr)
+{
+	struct nfs_readargs	arg = { fhandle, offset, count, buffer };
+	struct nfs_readres	res = { fattr, count };
+	int			status;
+
+	dprintk("NFS call  read %d @ %ld\n", count, offset);
+	status = rpc_call(server->client, NFSPROC_READ, &arg, &res,
+			swap? NFS_RPC_SWAPFLAGS : 0);
+	dprintk("NFS reply read: %d\n", status);
 	return status;
 }
 
 int
-nfs_proc_read_request(struct rpc_ioreq *req, struct nfs_server *server,
-			struct nfs_fh *fh, unsigned long offset,
-			unsigned long count, __u32 *buf)
+nfs_proc_write(struct nfs_server *server, struct nfs_fh *fhandle, int swap,
+			unsigned long offset, unsigned int count,
+			const void *buffer, struct nfs_fattr *fattr)
 {
-	__u32	*p, *p0;
-	int	len;
+	struct nfs_writeargs	arg = { fhandle, offset, count, buffer };
+	int			status;
 
-	PRINTK("NFS reqst read %ld @ %ld\n", count, offset);
-	if (!(p0 = nfs_rpc_alloc(NFS_SLACK_SPACE)))
-		return -EIO;
-
-	p = nfs_rpc_header(p0, NFSPROC_READ, 0);
-	p = xdr_encode_fhandle(p, fh);
-	*p++ = htonl(offset);
-	*p++ = htonl(count);
-	*p++ = htonl(count); /* traditional, could be any value */
-	req->rq_svec[0].iov_base = p0;
-	req->rq_svec[0].iov_len  = (p - p0) << 2;
-	req->rq_slen = (p - p0) << 2;
-	req->rq_snr = 1;
-
-	len = (6 + 1 + 17 + 1);		/* standard READ reply header */
-	req->rq_rvec[0].iov_base = p0;
-	req->rq_rvec[0].iov_len  = len << 2;
-	req->rq_rvec[1].iov_base = buf;
-	req->rq_rvec[1].iov_len  = count;
-	req->rq_rvec[2].iov_base = p0 + len;		/* spill buffer */
-	req->rq_rvec[2].iov_len  = (NFS_SLACK_SPACE - len) << 2;
-	req->rq_rlen = count + NFS_SLACK_SPACE;
-	req->rq_rnr = 3;
-
-	req->rq_addr = &server->toaddr;
-	req->rq_alen = sizeof(server->toaddr);
-
-	return rpc_transmit(server->rsock, req);
+	dprintk("NFS call  write %d @ %ld\n", count, offset);
+	status = rpc_call(server->client, NFSPROC_WRITE, &arg, fattr,
+			swap? (RPC_TASK_SWAPPER|RPC_TASK_ROOTCREDS) : 0);
+	dprintk("NFS reply read: %d\n", status);
+	return status < 0? status : count;
 }
 
 int
-nfs_proc_read_reply(struct rpc_ioreq *req, struct nfs_fattr *fattr)
+nfs_proc_create(struct nfs_server *server, struct nfs_fh *dir,
+			const char *name, struct nfs_sattr *sattr,
+			struct nfs_fh *fhandle, struct nfs_fattr *fattr)
 {
-	int		status;
-	__u32		*p0, *p;
-	int		count;
-
-	p0 = (__u32 *) req->rq_rvec[0].iov_base;
+	struct nfs_createargs	arg = { dir, name, sattr };
+	struct nfs_diropok	res = { fhandle, fattr };
+	int			status;
 
-	if (!(p = nfs_rpc_verify(p0))) {
-		/* Tell the upper layers to retry */
-		status = -EAGAIN;
-		/* status = -errno_NFSERR_IO; */
-	} else if ((status = ntohl(*p++)) == NFS_OK) {
-		p = xdr_decode_fattr(p, fattr);
-		count = ntohl(*p++);
-		if (p != req->rq_rvec[2].iov_base) {
-			/* unexpected RPC reply header size. punt.
-			 * fixme: move iovec contents to align data
-			 * on page boundary and adjust RPC header size
-			 * guess. */
-			status = -errno_NFSERR_IO;
-			PRINTK("NFS reply read odd header size %d\n",
-					(p - p0) << 2);
-		} else {
-			status = count;
-			PRINTK("NFS reply read %d\n", count);
-		}
-	}
-	else {
-		PRINTK("NFS reply read failed = %d\n", status);
-		status = -nfs_stat_to_errno(status);
-	}
-	nfs_rpc_free(p0);
-	return status;
-}
-
-int nfs_proc_write(struct inode * inode, int offset,
-		   int count, const char *data, struct nfs_fattr *fattr)
-{
-	int *p, *p0;
-	int status;
-	int ruid = 0;
-	void * kdata;	/* address of kernel copy */
-	struct nfs_server * server = NFS_SERVER(inode);
-	struct nfs_fh *fhandle = NFS_FH(inode);
-
-	PRINTK("NFS call  write %d @ %d\n", count, offset);
-	if (!(p0 = nfs_rpc_alloc(server->wsize)))
-		return -EIO;
-retry:
-	p = nfs_rpc_header(p0, NFSPROC_WRITE, ruid);
-	p = xdr_encode_fhandle(p, fhandle);
-	*p++ = htonl(offset); /* traditional, could be any value */
-	*p++ = htonl(offset);
-	*p++ = htonl(count); /* traditional, could be any value */
-	kdata = (void *) (p+1);	/* start of data in RPC buffer */
-	p = xdr_encode_data(p, data, count);
-	if ((status = nfs_rpc_call(server, p0, p, server->wsize)) < 0) {
-		nfs_rpc_free(p0);
-		return status;
-	}
-	if (!(p = nfs_rpc_verify(p0)))
-		status = -errno_NFSERR_IO;
-	else if ((status = ntohl(*p++)) == NFS_OK) {
-		update_vm_cache(inode, offset, kdata, count);
-		p = xdr_decode_fattr(p, fattr);
-		PRINTK("NFS reply write\n");
-		/* status = 0; */
-	}
-	else {
-		if (!ruid && current->fsuid == 0 && current->uid != 0) {
-			ruid = 1;
-			goto retry;
-		}
-		PRINTK("NFS reply write failed = %d\n", status);
-		status = -nfs_stat_to_errno(status);
-	}
-	nfs_rpc_free(p0);
+	dprintk("NFS call  create %s\n", name);
+	status = rpc_call(server->client, NFSPROC_CREATE, &arg, &res, 0);
+	dprintk("NFS reply create: %d\n", status);
 	return status;
 }
 
-int nfs_proc_create(struct nfs_server *server, struct nfs_fh *dir,
-		    const char *name, struct nfs_sattr *sattr,
-		    struct nfs_fh *fhandle, struct nfs_fattr *fattr)
-{
-	int *p, *p0;
-	int status;
-	int ruid = 0;
-
-	PRINTK("NFS call  create %s\n", name);
-	if (!(p0 = nfs_rpc_alloc(server->wsize)))
-		return -EIO;
-retry:
-	p = nfs_rpc_header(p0, NFSPROC_CREATE, ruid);
-	p = xdr_encode_fhandle(p, dir);
-	p = xdr_encode_string(p, name);
-	p = xdr_encode_sattr(p, sattr);
-	if ((status = nfs_rpc_call(server, p0, p, server->wsize)) < 0) {
-		nfs_rpc_free(p0);
-		return status;
-	}
-	if (!(p = nfs_rpc_verify(p0)))
-		status = -errno_NFSERR_IO;
-	else if ((status = ntohl(*p++)) == NFS_OK) {
-		p = xdr_decode_fhandle(p, fhandle);
-		p = xdr_decode_fattr(p, fattr);
-		PRINTK("NFS reply create\n");
-		/* status = 0; */
-	}
-	else {
-		if (!ruid && current->fsuid == 0 && current->uid != 0) {
-			ruid = 1;
-			goto retry;
-		}
-		PRINTK("NFS reply create failed = %d\n", status);
-		status = -nfs_stat_to_errno(status);
-	}
-	nfs_rpc_free(p0);
-	return status;
-}
-
-int nfs_proc_remove(struct nfs_server *server, struct nfs_fh *dir, const char *name)
-{
-	int *p, *p0;
-	int status;
-	int ruid = 0;
-
-	PRINTK("NFS call  remove %s\n", name);
-	if (!(p0 = nfs_rpc_alloc(server->wsize)))
-		return -EIO;
-retry:
-	p = nfs_rpc_header(p0, NFSPROC_REMOVE, ruid);
-	p = xdr_encode_fhandle(p, dir);
-	p = xdr_encode_string(p, name);
-	if ((status = nfs_rpc_call(server, p0, p, server->wsize)) < 0) {
-		nfs_rpc_free(p0);
-		return status;
-	}
-	if (!(p = nfs_rpc_verify(p0)))
-		status = -errno_NFSERR_IO;
-	else if ((status = ntohl(*p++)) == NFS_OK) {
-		PRINTK("NFS reply remove\n");
-		/* status = 0; */
-	}
-	else {
-		if (!ruid && current->fsuid == 0 && current->uid != 0) {
-			ruid = 1;
-			goto retry;
-		}
-		PRINTK("NFS reply remove failed = %d\n", status);
-		status = -nfs_stat_to_errno(status);
-	}
-	nfs_rpc_free(p0);
-	return status;
-}
-
-int nfs_proc_rename(struct nfs_server *server,
-		    struct nfs_fh *old_dir, const char *old_name,
-		    struct nfs_fh *new_dir, const char *new_name,
-		    int must_be_dir)
-{
-	int *p, *p0;
-	int status;
-	int ruid = 0;
-
-	/*
-	 * Disallow "rename()" with trailing slashes over NFS: getting
-	 * POSIX.1 behaviour is just too unlikely.
-	 */
-	if (must_be_dir)
-		return -EINVAL;
-	PRINTK("NFS call  rename %s -> %s\n", old_name, new_name);
-	if (!(p0 = nfs_rpc_alloc(server->wsize)))
-		return -EIO;
-retry:
-	p = nfs_rpc_header(p0, NFSPROC_RENAME, ruid);
-	p = xdr_encode_fhandle(p, old_dir);
-	p = xdr_encode_string(p, old_name);
-	p = xdr_encode_fhandle(p, new_dir);
-	p = xdr_encode_string(p, new_name);
-	if ((status = nfs_rpc_call(server, p0, p, server->wsize)) < 0) {
-		nfs_rpc_free(p0);
-		return status;
-	}
-	if (!(p = nfs_rpc_verify(p0)))
-		status = -errno_NFSERR_IO;
-	else if ((status = ntohl(*p++)) == NFS_OK) {
-		PRINTK("NFS reply rename\n");
-		/* status = 0; */
-	}
-	else {
-		if (!ruid && current->fsuid == 0 && current->uid != 0) {
-			ruid = 1;
-			goto retry;
-		}
-		PRINTK("NFS reply rename failed = %d\n", status);
-		status = -nfs_stat_to_errno(status);
-	}
-	nfs_rpc_free(p0);
-	return status;
-}
-
-int nfs_proc_link(struct nfs_server *server, struct nfs_fh *fhandle,
-		  struct nfs_fh *dir, const char *name)
+int
+nfs_proc_remove(struct nfs_server *server, struct nfs_fh *dir, const char *name)
 {
-	int *p, *p0;
-	int status;
-	int ruid = 0;
+	struct nfs_diropargs	arg = { dir, name };
+	int			status;
 
-	PRINTK("NFS call  link %s\n", name);
-	if (!(p0 = nfs_rpc_alloc(server->wsize)))
-		return -EIO;
-retry:
-	p = nfs_rpc_header(p0, NFSPROC_LINK, ruid);
-	p = xdr_encode_fhandle(p, fhandle);
-	p = xdr_encode_fhandle(p, dir);
-	p = xdr_encode_string(p, name);
-	if ((status = nfs_rpc_call(server, p0, p, server->wsize)) < 0) {
-		nfs_rpc_free(p0);
-		return status;
-	}
-	if (!(p = nfs_rpc_verify(p0)))
-		status = -errno_NFSERR_IO;
-	else if ((status = ntohl(*p++)) == NFS_OK) {
-		PRINTK("NFS reply link\n");
-		/* status = 0; */
-	}
-	else {
-		if (!ruid && current->fsuid == 0 && current->uid != 0) {
-			ruid = 1;
-			goto retry;
-		}
-		PRINTK("NFS reply link failed = %d\n", status);
-		status = -nfs_stat_to_errno(status);
-	}
-	nfs_rpc_free(p0);
+	dprintk("NFS call  remove %s\n", name);
+	status = rpc_call(server->client, NFSPROC_REMOVE, &arg, NULL, 0);
+	dprintk("NFS reply remove: %d\n", status);
 	return status;
 }
 
-int nfs_proc_symlink(struct nfs_server *server, struct nfs_fh *dir,
-		     const char *name, const char *path, struct nfs_sattr *sattr)
+int
+nfs_proc_rename(struct nfs_server *server,
+			struct nfs_fh *old_dir, const char *old_name,
+			struct nfs_fh *new_dir, const char *new_name)
 {
-	int *p, *p0;
-	int status;
-	int ruid = 0;
+	struct nfs_renameargs	arg = { old_dir, old_name, new_dir, new_name };
+	int			status;
 
-	PRINTK("NFS call  symlink %s -> %s\n", name, path);
-	if (!(p0 = nfs_rpc_alloc(server->wsize)))
-		return -EIO;
-retry:
-	p = nfs_rpc_header(p0, NFSPROC_SYMLINK, ruid);
-	p = xdr_encode_fhandle(p, dir);
-	p = xdr_encode_string(p, name);
-	p = xdr_encode_string(p, path);
-	p = xdr_encode_sattr(p, sattr);
-	if ((status = nfs_rpc_call(server, p0, p, server->wsize)) < 0) {
-		nfs_rpc_free(p0);
-		return status;
-	}
-	if (!(p = nfs_rpc_verify(p0)))
-		status = -errno_NFSERR_IO;
-	else if ((status = ntohl(*p++)) == NFS_OK) {
-		PRINTK("NFS reply symlink\n");
-		/* status = 0; */
-	}
-	else {
-		if (!ruid && current->fsuid == 0 && current->uid != 0) {
-			ruid = 1;
-			goto retry;
-		}
-		PRINTK("NFS reply symlink failed = %d\n", status);
-		status = -nfs_stat_to_errno(status);
-	}
-	nfs_rpc_free(p0);
+	dprintk("NFS call  rename %s -> %s\n", old_name, new_name);
+	status = rpc_call(server->client, NFSPROC_RENAME, &arg, NULL, 0);
+	dprintk("NFS reply rename: %d\n", status);
 	return status;
 }
 
-int nfs_proc_mkdir(struct nfs_server *server, struct nfs_fh *dir,
-		   const char *name, struct nfs_sattr *sattr,
-		   struct nfs_fh *fhandle, struct nfs_fattr *fattr)
+int
+nfs_proc_link(struct nfs_server *server, struct nfs_fh *fhandle,
+			struct nfs_fh *dir, const char *name)
 {
-	int *p, *p0;
-	int status;
-	int ruid = 0;
+	struct nfs_linkargs	arg = { fhandle, dir, name };
+	int			status;
 
-	PRINTK("NFS call  mkdir %s\n", name);
-	if (!(p0 = nfs_rpc_alloc(server->wsize)))
-		return -EIO;
-retry:
-	p = nfs_rpc_header(p0, NFSPROC_MKDIR, ruid);
-	p = xdr_encode_fhandle(p, dir);
-	p = xdr_encode_string(p, name);
-	p = xdr_encode_sattr(p, sattr);
-	if ((status = nfs_rpc_call(server, p0, p, server->wsize)) < 0) {
-		nfs_rpc_free(p0);
-		return status;
-	}
-	if (!(p = nfs_rpc_verify(p0)))
-		status = -errno_NFSERR_IO;
-	else if ((status = ntohl(*p++)) == NFS_OK) {
-		p = xdr_decode_fhandle(p, fhandle);
-		p = xdr_decode_fattr(p, fattr);
-		PRINTK("NFS reply mkdir\n");
-		/* status = 0; */
-	}
-	else {
-		if (!ruid && current->fsuid == 0 && current->uid != 0) {
-			ruid = 1;
-			goto retry;
-		}
-		PRINTK("NFS reply mkdir failed = %d\n", status);
-		status = -nfs_stat_to_errno(status);
-	}
-	nfs_rpc_free(p0);
+	dprintk("NFS call  link %s\n", name);
+	status = rpc_call(server->client, NFSPROC_LINK, &arg, NULL, 0);
+	dprintk("NFS reply link: %d\n", status);
 	return status;
 }
 
-int nfs_proc_rmdir(struct nfs_server *server, struct nfs_fh *dir, const char *name)
+int
+nfs_proc_symlink(struct nfs_server *server, struct nfs_fh *dir,
+			const char *name, const char *path,
+			struct nfs_sattr *sattr)
 {
-	int *p, *p0;
-	int status;
-	int ruid = 0;
+	struct nfs_symlinkargs	arg = { dir, name, path, sattr };
+	int			status;
 
-	PRINTK("NFS call  rmdir %s\n", name);
-	if (!(p0 = nfs_rpc_alloc(server->wsize)))
-		return -EIO;
-retry:
-	p = nfs_rpc_header(p0, NFSPROC_RMDIR, ruid);
-	p = xdr_encode_fhandle(p, dir);
-	p = xdr_encode_string(p, name);
-	if ((status = nfs_rpc_call(server, p0, p, server->wsize)) < 0) {
-		nfs_rpc_free(p0);
-		return status;
-	}
-	if (!(p = nfs_rpc_verify(p0)))
-		status = -errno_NFSERR_IO;
-	else if ((status = ntohl(*p++)) == NFS_OK) {
-		PRINTK("NFS reply rmdir\n");
-		/* status = 0; */
-	}
-	else {
-		if (!ruid && current->fsuid == 0 && current->uid != 0) {
-			ruid = 1;
-			goto retry;
-		}
-		PRINTK("NFS reply rmdir failed = %d\n", status);
-		status = -nfs_stat_to_errno(status);
-	}
-	nfs_rpc_free(p0);
+	dprintk("NFS call  symlink %s -> %s\n", name, path);
+	status = rpc_call(server->client, NFSPROC_SYMLINK, &arg, NULL, 0);
+	dprintk("NFS reply symlink: %d\n", status);
 	return status;
 }
 
-int nfs_proc_readdir(struct nfs_server *server, struct nfs_fh *fhandle,
-		     int cookie, int count, struct nfs_entry *entry)
+int
+nfs_proc_mkdir(struct nfs_server *server, struct nfs_fh *dir,
+			const char *name, struct nfs_sattr *sattr,
+			struct nfs_fh *fhandle, struct nfs_fattr *fattr)
 {
-	int *p, *p0;
-	int status;
-	int ruid = 0;
-	int i;
-	int size;
-	int eof;
+	struct nfs_createargs	arg = { dir, name, sattr };
+	struct nfs_diropok	res = { fhandle, fattr };
+	int			status;
 
-	PRINTK("NFS call  readdir %d @ %d\n", count, cookie);
-	size = server->rsize;
-	if (!(p0 = nfs_rpc_alloc(server->rsize)))
-		return -EIO;
-retry:
-	p = nfs_rpc_header(p0, NFSPROC_READDIR, ruid);
-	p = xdr_encode_fhandle(p, fhandle);
-	*p++ = htonl(cookie);
-	*p++ = htonl(size);
-	if ((status = nfs_rpc_call(server, p0, p, server->rsize)) < 0) {
-		nfs_rpc_free(p0);
-		return status;
-	}
-	if (!(p = nfs_rpc_verify(p0)))
-		status = -errno_NFSERR_IO;
-	else if ((status = ntohl(*p++)) == NFS_OK) {
-		for (i = 0; i < count && *p++; i++) {
-			if (!(p = xdr_decode_entry(p, entry++)))
-				break;
-		}
-		if (!p) {
-			printk("nfs_proc_readdir: giant filename\n");
-			status = -errno_NFSERR_IO;
-		}
-		else {
-			eof = (i == count && !*p++ && *p++)
-			      || (i < count && *p++);
-			if (eof && i)
-				entry[-1].eof = 1;
-			PRINTK("NFS reply readdir %d %s\n", i,
-			       eof ? "eof" : "");
-			status = i;
-		}
-	}
-	else {
-		if (!ruid && current->fsuid == 0 && current->uid != 0) {
-			ruid = 1;
-			goto retry;
-		}
-		PRINTK("NFS reply readdir failed = %d\n", status);
-		status = -nfs_stat_to_errno(status);
-	}
-	nfs_rpc_free(p0);
+	dprintk("NFS call  mkdir %s\n", name);
+	status = rpc_call(server->client, NFSPROC_MKDIR, &arg, &res, 0);
+	dprintk("NFS reply mkdir: %d\n", status);
 	return status;
 }
 
-int nfs_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
-		    struct nfs_fsinfo *res)
+int
+nfs_proc_rmdir(struct nfs_server *server, struct nfs_fh *dir, const char *name)
 {
-	int *p, *p0;
-	int status;
-	int ruid = 0;
+	struct nfs_diropargs	arg = { dir, name };
+	int			status;
 
-	PRINTK("NFS call  statfs\n");
-	if (!(p0 = nfs_rpc_alloc(server->rsize)))
-		return -EIO;
-retry:
-	p = nfs_rpc_header(p0, NFSPROC_STATFS, ruid);
-	p = xdr_encode_fhandle(p, fhandle);
-	if ((status = nfs_rpc_call(server, p0, p, server->rsize)) < 0) {
-		nfs_rpc_free(p0);
-		return status;
-	}
-	if (!(p = nfs_rpc_verify(p0)))
-		status = -errno_NFSERR_IO;
-	else if ((status = ntohl(*p++)) == NFS_OK) {
-		p = xdr_decode_fsinfo(p, res);
-		PRINTK("NFS reply statfs\n");
-		/* status = 0; */
-	}
-	else {
-		if (!ruid && current->fsuid == 0 && current->uid != 0) {
-			ruid = 1;
-			goto retry;
-		}
-		PRINTK("NFS reply statfs failed = %d\n", status);
-		status = -nfs_stat_to_errno(status);
-	}
-	nfs_rpc_free(p0);
+	dprintk("NFS call  rmdir %s\n", name);
+	status = rpc_call(server->client, NFSPROC_RMDIR, &arg, NULL, 0);
+	dprintk("NFS reply rmdir: %d\n", status);
 	return status;
 }
 
 /*
- * Here are a few RPC-assist functions.
+ * The READDIR implementation is somewhat hackish - we pass a temporary
+ * buffer to the encode function, which installs it in the receive
+ * iovec. The dirent buffer itself is passed in the result struct.
  */
-
-int *rpc_header(int *p, int procedure, int program, int version,
-					int uid, int gid,
-					int ngroup, gid_t *groups)
-{
-	int *p1;
-	static int xid = 0;
-	unsigned char *sys = (unsigned char *) system_utsname.nodename;
-
-	if (xid == 0) {
-		xid = CURRENT_TIME;
-		xid ^= (sys[3]<<24) | (sys[2]<<16) | (sys[1]<<8) | sys[0];
-	}
-	*p++ = htonl(++xid);
-	*p++ = htonl(RPC_CALL);
-	*p++ = htonl(RPC_VERSION);
-	*p++ = htonl(program);
-	*p++ = htonl(version);
-	*p++ = htonl(procedure);
-	*p++ = htonl(RPC_AUTH_UNIX);
-	p1 = p++;
-	*p++ = htonl(CURRENT_TIME); /* traditional, could be anything */
-	p = xdr_encode_string(p, (char *) sys);
-	*p++ = htonl(uid);
-	*p++ = htonl(gid);
-	if (ngroup > 16)
-		ngroup = 16;
-	*p++ = htonl(ngroup);
-	while (ngroup) {
-		*p++ = htonl(*groups);
-		groups++;
-		ngroup--;
-	}
-	*p1 = htonl((p - (p1 + 1)) << 2);
-	*p++ = htonl(RPC_AUTH_NULL);
-	*p++ = htonl(0);
-	return p;
-}
-
-
-static int *nfs_rpc_header(int *p, int procedure, int ruid)
-{
-	return rpc_header(p, procedure, NFS_PROGRAM, NFS_VERSION,
-			(ruid ? current->uid : current->fsuid),
-			current->egid, current->ngroups, current->groups);
-}
-
-
-int *rpc_verify(int *p)
+int
+nfs_proc_readdir(struct nfs_server *server, struct nfs_fh *fhandle,
+			u32 cookie, unsigned int size, struct nfs_entry *entry)
 {
-	unsigned int n;
+	struct nfs_readdirargs	arg;
+	struct nfs_readdirres	res;
+	void *			buffer;
+	int			status;
 
-	p++;
-	if ((n = ntohl(*p++)) != RPC_REPLY) {
-		printk("nfs_rpc_verify: not an RPC reply: %x\n", n);
-		return NULL;
-	}
-	if ((n = ntohl(*p++)) != RPC_MSG_ACCEPTED) {
-		printk("nfs_rpc_verify: RPC call rejected: %d\n", n);
-		return NULL;
-	}
-	switch (n = ntohl(*p++)) {
-	case RPC_AUTH_NULL: case RPC_AUTH_UNIX: case RPC_AUTH_SHORT:
-		break;
-	default:
-		printk("nfs_rpc_verify: bad RPC authentication type: %d\n", n);
-		return NULL;
-	}
-	if ((n = ntohl(*p++)) > 400) {
-		printk("nfs_rpc_verify: giant auth size\n");
-		return NULL;
-	}
-	p += QUADLEN(n);
-	if ((n = ntohl(*p++)) != RPC_SUCCESS) {
-		printk("nfs_rpc_verify: RPC call failed: %d\n", n);
-		return NULL;
+	/* First get a temp buffer for the readdir reply */
+	while (!(buffer = (void *) get_free_page(GFP_USER))) {
+		need_resched = 1;
+		schedule();
+		if (signalled())
+			return -ERESTARTSYS;
 	}
-	return p;
-}
 
+	arg.fh = fhandle;
+	arg.cookie = cookie;
+	arg.buffer = buffer;
+	arg.bufsiz = server->rsize < PAGE_SIZE? server->rsize : PAGE_SIZE;
+	res.buffer = entry;
+	res.bufsiz = size;
 
-static int *nfs_rpc_verify(int *p)
-{
-	return rpc_verify(p);
+	dprintk("NFS call  readdir %d\n", cookie);
+	status = rpc_call(server->client, NFSPROC_READDIR, &arg, &res, 0);
+	dprintk("NFS reply readdir: %d\n", status);
+	free_page((unsigned long) buffer);
+	return status;
 }
 
-
-/*
- * 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
+nfs_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
+			struct nfs_fsinfo *info)
 {
-	int i;
+	int	status;
 
-	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;
+	dprintk("NFS call  statfs\n");
+	status = rpc_call(server->client, NFSPROC_STATFS, fhandle, info, 0);
+	dprintk("NFS reply statfs: %d\n", status);
+	return status;
 }
-