Merge http://nfsclient.bkbits.net/linux-2.5

into home.transmeta.com:/home/torvalds/v2.5/linux

fs/nfs/Makefile

@@ -8,6 +8,7 @@ nfs-y 			:= dir.o file.o inode.o nfs2xdr.o pagelist.o \
 			   proc.o read.o symlink.o unlink.o write.o
 nfs-$(CONFIG_ROOT_NFS)	+= nfsroot.o mount_clnt.o      
 nfs-$(CONFIG_NFS_V3)	+= nfs3proc.o nfs3xdr.o
-nfs-$(CONFIG_NFS_V4)	+= nfs4proc.o nfs4xdr.o nfs4state.o nfs4renewd.o
+nfs-$(CONFIG_NFS_V4)	+= nfs4proc.o nfs4xdr.o nfs4state.o nfs4renewd.o \
+			   idmap.o
 nfs-$(CONFIG_NFS_DIRECTIO) += direct.o
 nfs-objs		:= $(nfs-y)

fs/nfs/dir.c

@@ -35,6 +35,7 @@
 #define NFS_PARANOIA 1
 /* #define NFS_DEBUG_VERBOSE 1 */
 
+static int nfs_opendir(struct inode *, struct file *);
 static int nfs_readdir(struct file *, void *, filldir_t);
 static struct dentry *nfs_lookup(struct inode *, struct dentry *);
 static int nfs_cached_lookup(struct inode *, struct dentry *,
@@ -52,7 +53,7 @@ static int nfs_rename(struct inode *, struct dentry *,
 struct file_operations nfs_dir_operations = {
 	.read		= generic_read_dir,
 	.readdir	= nfs_readdir,
-	.open		= nfs_open,
+	.open		= nfs_opendir,
 	.release	= nfs_release,
 };
 
@@ -71,6 +72,26 @@ struct inode_operations nfs_dir_inode_operations = {
 	.setattr	= nfs_setattr,
 };
 
+/*
+ * Open file
+ */
+static int
+nfs_opendir(struct inode *inode, struct file *filp)
+{
+	struct nfs_server *server = NFS_SERVER(inode);
+	int res = 0;
+
+	lock_kernel();
+	/* Do cto revalidation */
+	if (server->flags & NFS_MOUNT_NOCTO)
+		res = __nfs_revalidate_inode(server, inode);
+	/* Call generic open code in order to cache credentials */
+	if (!res)
+		res = nfs_open(inode, filp);
+	unlock_kernel();
+	return res;
+}
+
 typedef u32 * (*decode_dirent_t)(u32 *, struct nfs_entry *, int);
 typedef struct {
 	struct file	*file;

fs/nfs/file.c

@@ -34,6 +34,7 @@
 
 #define NFSDBG_FACILITY		NFSDBG_FILE
 
+static int nfs_file_open(struct inode *, struct file *);
 static int  nfs_file_mmap(struct file *, struct vm_area_struct *);
 static ssize_t nfs_file_sendfile(struct file *, loff_t *, size_t, read_actor_t, void *);
 static ssize_t nfs_file_read(struct kiocb *, char *, size_t, loff_t);
@@ -48,7 +49,7 @@ struct file_operations nfs_file_operations = {
 	.aio_read		= nfs_file_read,
 	.aio_write		= nfs_file_write,
 	.mmap		= nfs_file_mmap,
-	.open		= nfs_open,
+	.open		= nfs_file_open,
 	.flush		= nfs_file_flush,
 	.release	= nfs_release,
 	.fsync		= nfs_fsync,
@@ -67,6 +68,30 @@ struct inode_operations nfs_file_inode_operations = {
 # define IS_SWAPFILE(inode)	(0)
 #endif
 
+/*
+ * Open file
+ */
+static int
+nfs_file_open(struct inode *inode, struct file *filp)
+{
+	struct nfs_server *server = NFS_SERVER(inode);
+	int (*open)(struct inode *, struct file *);
+	int res = 0;
+
+	lock_kernel();
+	/* Do NFSv4 open() call */
+	if ((open = server->rpc_ops->file_open) != NULL)
+		res = open(inode, filp);
+	/* Do cto revalidation */
+	else if (server->flags & NFS_MOUNT_NOCTO)
+		res = __nfs_revalidate_inode(server, inode);
+	/* Call generic open code in order to cache credentials */
+	if (!res)
+		res = nfs_open(inode, filp);
+	unlock_kernel();
+	return res;
+}
+
 /*
  * Flush all dirty pages, and check for write errors.
  *

fs/nfs/inode.c

@@ -33,6 +33,7 @@
 #include <linux/smp_lock.h>
 #include <linux/seq_file.h>
 #include <linux/mount.h>
+#include <linux/nfs_idmap.h>
 #include <linux/vfs.h>
 
 #include <asm/system.h>
@@ -140,6 +141,10 @@ nfs_clear_inode(struct inode *inode)
 	cred = nfsi->cache_access.cred;
 	if (cred)
 		put_rpccred(cred);
+	/* Clean up the V4 state */
+	nfs4_put_shareowner(inode, nfsi->wo_owner);
+	nfs4_put_shareowner(inode, nfsi->ro_owner);
+	nfs4_put_shareowner(inode, nfsi->rw_owner);
 }
 
 void
@@ -148,6 +153,11 @@ nfs_put_super(struct super_block *sb)
 	struct nfs_server *server = NFS_SB(sb);
 	struct rpc_clnt	*rpc;
 
+#ifdef CONFIG_NFS_V4
+	if (server->idmap != NULL)
+		nfs_idmap_delete(server);
+#endif /* CONFIG_NFS_V4 */
+
 	if ((rpc = server->client) != NULL)
 		rpc_shutdown_client(rpc);
 
@@ -156,6 +166,7 @@ nfs_put_super(struct super_block *sb)
 	rpciod_down();		/* release rpciod */
 
 	destroy_nfsv4_state(server);
+
 	kfree(server->hostname);
 }
 
@@ -855,23 +866,13 @@ int nfs_open(struct inode *inode, struct file *filp)
 {
 	struct rpc_auth *auth;
 	struct rpc_cred *cred;
-	int err = 0;
 
-	lock_kernel();
-	/* Ensure that we revalidate the data cache */
-	if (NFS_SERVER(inode)->flags & NFS_MOUNT_NOCTO) {
-		err = __nfs_revalidate_inode(NFS_SERVER(inode),inode);
-		if (err)
-			goto out;
-	}
 	auth = NFS_CLIENT(inode)->cl_auth;
 	cred = rpcauth_lookupcred(auth, 0);
 	filp->private_data = cred;
 	if (filp->f_mode & FMODE_WRITE)
 		nfs_set_mmcred(inode, cred);
-out:
-	unlock_kernel();
-	return err;
+	return 0;
 }
 
 int nfs_release(struct inode *inode, struct file *filp)
@@ -1368,11 +1369,16 @@ static int nfs4_fill_super(struct super_block *sb, struct nfs4_mount_data *data,
 	if (create_nfsv4_state(server, data))
 		goto out_shutdown;
 
+	if ((server->idmap = nfs_idmap_new(server)) == NULL)
+		printk(KERN_WARNING "NFS: couldn't start IDmap\n");
+
 	err = nfs_sb_init(sb);
 	if (err == 0)
 		return 0;
 	rpciod_down();
 	destroy_nfsv4_state(server);
+	if (server->idmap != NULL)
+		nfs_idmap_delete(server);
 out_shutdown:
 	rpc_shutdown_client(server->client);
 out_fail:
@@ -1502,9 +1508,18 @@ static struct file_system_type nfs4_fs_type = {
 	.kill_sb	= nfs_kill_super,
 	.fs_flags	= FS_ODD_RENAME,
 };
+
+#define nfs4_zero_state(nfsi) \
+	do { \
+		(nfsi)->wo_owner = NULL; \
+		(nfsi)->ro_owner = NULL; \
+		(nfsi)->rw_owner = NULL; \
+	} while(0)
 #define register_nfs4fs() register_filesystem(&nfs4_fs_type)
 #define unregister_nfs4fs() unregister_filesystem(&nfs4_fs_type)
 #else
+#define nfs4_zero_state(nfsi) \
+	do { } while (0)
 #define register_nfs4fs() (0)
 #define unregister_nfs4fs()
 #endif
@@ -1526,6 +1541,7 @@ static struct inode *nfs_alloc_inode(struct super_block *sb)
 		return NULL;
 	nfsi->flags = 0;
 	nfsi->mm_cred = NULL;
+	nfs4_zero_state(nfsi);
 	return &nfsi->vfs_inode;
 }
 

fs/nfs/nfs4state.c

@@ -42,6 +42,16 @@
 #include <linux/slab.h>
 #include <linux/nfs_fs.h>
 
+/* This protects most of the client-side state. */
+static spinlock_t               state_spinlock = SPIN_LOCK_UNLOCKED;
+
+nfs4_stateid zero_stateid =
+	{ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
+
+nfs4_stateid one_stateid =
+	{ 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff };
+
+
 /*
  * nfs4_get_client(): returns an empty client structure
  * nfs4_put_client(): drops reference to client structure
@@ -54,11 +64,8 @@ nfs4_get_client(void)
 {
 	struct nfs4_client *clp;
 
-        if ((clp = kmalloc(sizeof(*clp), GFP_KERNEL))) {
-                atomic_set(&clp->cl_count, 1);
-                clp->cl_clientid = 0;
-                INIT_LIST_HEAD(&clp->cl_lockowners);
-        }
+	if ((clp = kmalloc(sizeof(*clp), GFP_KERNEL)))
+		memset(clp, 0, sizeof(nfs4_verifier));
 	return clp;
 }
 
@@ -66,12 +73,155 @@ void
 nfs4_put_client(struct nfs4_client *clp)
 {
 	BUG_ON(!clp);
-        BUG_ON(!atomic_read(&clp->cl_count));
-        
-        if (atomic_dec_and_test(&clp->cl_count)) {
-                BUG_ON(!list_empty(&clp->cl_lockowners));
 	kfree(clp);
+}
+
+static inline u32
+nfs4_alloc_lockowner_id(struct nfs4_client *clp)
+{
+	u32 res;
+
+	spin_lock(&state_spinlock);
+	res = clp->cl_lockowner_id ++;
+	spin_unlock(&state_spinlock);
+	return res;
+}
+
+/*
+ * nfs4_get_shareowner(): this is called on the OPEN or CREATE path to
+ * obtain a new shareowner.
+ *
+ * There are three shareowners (open_owner4 in rfc3010) per inode,
+ * one for each possible combination of share lock access. Since
+ * Linux does not support the deny access type, there are
+ * three (not 9) referenced by the nfs_inode:
+ *
+ * O_WRONLY: inode->wo_owner
+ * O_RDONLY: inode->ro_owner
+ * O_RDWR:   inode->rw_owner
+ *
+ * We create a new shareowner the first time a file is OPENed with
+ * one of the above shares. All other OPENs with a similar
+ * share use the single stateid associated with the inode.
+ *
+ */
+struct nfs4_shareowner *
+nfs4_get_shareowner(struct inode *dir)
+{
+	struct nfs4_client *clp;
+	struct nfs4_shareowner *sp;
+
+	sp = kmalloc(sizeof(*sp),GFP_KERNEL);
+	if (!sp)
+		return NULL;
+	clp = (NFS_SB(dir->i_sb))->nfs4_state;
+	BUG_ON(!clp);
+	init_MUTEX(&sp->so_sema);
+	sp->so_seqid = 0;                 /* arbitrary */
+	memset(sp->so_stateid, 0, sizeof(nfs4_stateid));
+	sp->so_id = nfs4_alloc_lockowner_id(clp);
+	return sp;
+}
+
+/*
+ * Called for each non-null inode shareowner in nfs_clear_inode, 
+ * or if nfs4_do_open fails.
+ */
+void
+nfs4_put_shareowner(struct inode *inode, struct nfs4_shareowner *sp)
+{
+	if (!sp)
+		return;
+	if (sp->so_flags & O_ACCMODE)
+		nfs4_do_close(inode, sp);
+        kfree(sp);
+}
+
+/*
+* Called with sp->so_sema held.
+*
+* Increment the seqid if the OPEN/OPEN_DOWNGRADE/CLOSE succeeded, or
+* failed with a seqid incrementing error -
+* see comments nfs_fs.h:seqid_mutating_error()
+*/
+void
+nfs4_increment_seqid(u32 status, struct nfs4_shareowner *sp)
+{
+	if (status == NFS_OK || seqid_mutating_err(status))
+		sp->so_seqid++;
+}
+
+/*
+* Called by nfs4_proc_open to set the appropriate stateid
+*/
+int
+nfs4_set_inode_share(struct inode * inode, struct nfs4_shareowner *sp, unsigned int open_flags)
+{
+	struct nfs_inode *nfsi = NFS_I(inode);
+
+	switch (open_flags & O_ACCMODE) {
+		case O_RDONLY:
+			if (!nfsi->ro_owner) {
+				nfsi->ro_owner = sp;
+				return 0;
+			}
+			break;
+		case O_WRONLY:
+			if (!nfsi->wo_owner) {
+				nfsi->wo_owner = sp;
+				return 0;
+			}
+			break;
+		case O_RDWR:
+			if (!nfsi->rw_owner) {
+				nfsi->rw_owner = sp;
+				return 0;
+			}
+	}
+	return -EBUSY;
+}
+
+/*
+* Boolean test to determine if an OPEN call goes on the wire.
+*
+* Called by nfs4_proc_open.
+*/
+int
+nfs4_test_shareowner(struct inode *inode, unsigned int open_flags)
+{
+	struct nfs_inode *nfsi = NFS_I(inode);
+
+	switch (open_flags & O_ACCMODE) {
+		case O_RDONLY:
+			if(nfsi->ro_owner)
+				return 0;
+			break;
+		case O_WRONLY:
+			if(nfsi->wo_owner)
+				return 0;
+			break;
+		case O_RDWR:
+			if(nfsi->rw_owner)
+				return 0;
+        }
+        return 1;
+}
+
+struct nfs4_shareowner *
+nfs4_get_inode_share(struct inode * inode, unsigned int open_flags)
+{
+	struct nfs_inode *nfsi = NFS_I(inode);
+
+	switch (open_flags & O_ACCMODE) {
+		case O_RDONLY:
+			return nfsi->ro_owner;
+		case O_WRONLY:
+			return nfsi->wo_owner;
+		case O_RDWR:
+			return nfsi->rw_owner;
 	}
+	/* Duh gcc warning if we don't... */
+	return NULL;
 }
 
 /*

include/linux/nfs4.h

@@ -206,6 +206,10 @@ enum {
 	NFSPROC4_CLNT_READ,
 	NFSPROC4_CLNT_WRITE,
 	NFSPROC4_CLNT_COMMIT,
+	NFSPROC4_CLNT_OPEN,
+	NFSPROC4_CLNT_OPEN_CONFIRM,
+	NFSPROC4_CLNT_CLOSE,
+	NFSPROC4_CLNT_SETATTR,
 };
 
 #endif

include/linux/nfs_fs.h

@@ -155,6 +155,13 @@ struct nfs_inode {
 
 	wait_queue_head_t	nfs_i_wait;
 
+#ifdef CONFIG_NFS_V4
+        /* NFSv4 state */
+	struct nfs4_shareowner   *ro_owner;
+	struct nfs4_shareowner   *wo_owner;
+	struct nfs4_shareowner   *rw_owner;
+#endif /* CONFIG_NFS_V4*/
+
 	struct inode		vfs_inode;
 };
 
@@ -435,28 +442,75 @@ extern void * nfs_root_data(void);
 #define NFS_JUKEBOX_RETRY_TIME (5 * HZ)
 
 #ifdef CONFIG_NFS_V4
+
+/*
+ * In a seqid-mutating op, this macro controls which error return
+ * values trigger incrementation of the seqid.
+ *
+ * from rfc 3010:
+ * The client MUST monotonically increment the sequence number for the
+ * CLOSE, LOCK, LOCKU, OPEN, OPEN_CONFIRM, and OPEN_DOWNGRADE
+ * operations.  This is true even in the event that the previous
+ * operation that used the sequence number received an error.  The only
+ * exception to this rule is if the previous operation received one of
+ * the following errors: NFSERR_STALE_CLIENTID, NFSERR_STALE_STATEID,
+ * NFSERR_BAD_STATEID, NFSERR_BAD_SEQID, NFSERR_BADXDR,
+ * NFSERR_RESOURCE, NFSERR_NOFILEHANDLE.
+ *
+ */
+#define seqid_mutating_err(err)       \
+(((err) != NFSERR_STALE_CLIENTID) &&  \
+ ((err) != NFSERR_STALE_STATEID)  &&  \
+ ((err) != NFSERR_BAD_STATEID)    &&  \
+ ((err) != NFSERR_BAD_SEQID)      &&  \
+ ((err) != NFSERR_BAD_XDR)        &&  \
+ ((err) != NFSERR_RESOURCE)       &&  \
+ ((err) != NFSERR_NOFILEHANDLE))
+
 struct nfs4_client {
-        atomic_t                cl_count;       /* refcount */
         u64                     cl_clientid;    /* constant */
 	nfs4_verifier           cl_confirm;     
 
-        /*
-         * Starts a list of lockowners, linked through lo_list.
-	 */
-        struct list_head        cl_lockowners;  /* protected by state_spinlock */
+	u32			cl_lockowner_id;
 };
 
+/*
+* The ->so_sema is held during all shareowner seqid-mutating operations:
+* OPEN, OPEN_DOWNGRADE, and CLOSE.
+* Its purpose is to properly serialize so_seqid, as mandated by
+* the protocol.
+*/
+struct nfs4_shareowner {
+	u32                  so_id;      /* 32-bit identifier, unique */
+	struct semaphore     so_sema;
+	u32                  so_seqid;   /* protected by so_sema */
+	nfs4_stateid         so_stateid; /* protected by so_sema */
+	unsigned int         so_flags;   /* protected by so_sema */
+};
+
+
 /* nfs4proc.c */
 extern int nfs4_proc_renew(struct nfs_server *server);
+extern int nfs4_do_close(struct inode *inode, struct nfs4_shareowner *sp);
 
 /* nfs4renewd.c */
 extern int nfs4_init_renewd(struct nfs_server *server);
-#endif /* CONFIG_NFS_V4 */
-
-#ifdef CONFIG_NFS_V4
 
+/* nfs4state.c */
 extern struct nfs4_client *nfs4_get_client(void);
 extern void nfs4_put_client(struct nfs4_client *clp);
+extern struct nfs4_shareowner * nfs4_get_shareowner(struct inode *inode);
+void nfs4_put_shareowner(struct inode *inode, struct nfs4_shareowner *sp);
+extern int nfs4_set_inode_share(struct inode * inode,
+                     struct nfs4_shareowner *sp, unsigned int flags);
+extern void nfs4_increment_seqid(u32 status, struct nfs4_shareowner *sp);
+extern int nfs4_test_shareowner(struct inode *inode, unsigned int open_flags);
+struct nfs4_shareowner * nfs4_get_inode_share(struct inode * inode, unsigned int open_flags);
+
+
+
+
+
 
 struct nfs4_mount_data;
 static inline int
@@ -481,6 +535,7 @@ destroy_nfsv4_state(struct nfs_server *server)
 #else
 #define create_nfsv4_state(server, data)  0
 #define destroy_nfsv4_state(server)       do { } while (0)
+#define nfs4_put_shareowner(inode, owner) do { } while (0)
 #endif
 
 #endif /* __KERNEL__ */

include/linux/nfs_fs_sb.h

@@ -36,6 +36,7 @@ struct nfs_server {
 	struct nfs4_client *	nfs4_state;	/* all NFSv4 state starts here */
 	unsigned long		lease_time;	/* in jiffies */
 	unsigned long		last_renewal;	/* in jiffies */
+	void                   *idmap;
 #endif
 };
 

include/linux/nfs_idmap.h

+/*
+ * include/linux/nfs_idmap.h
+ *
+ *  UID and GID to name mapping for clients.
+ *
+ *  Copyright (c) 2002 The Regents of the University of Michigan.
+ *  All rights reserved.
+ *
+ *  Marius Aamodt Eriksen <marius@umich.edu>
+ *
+ *  Redistribution and use in source and binary forms, with or without
+ *  modification, are permitted provided that the following conditions
+ *  are met:
+ *
+ *  1. Redistributions of source code must retain the above copyright
+ *     notice, this list of conditions and the following disclaimer.
+ *  2. Redistributions in binary form must reproduce the above copyright
+ *     notice, this list of conditions and the following disclaimer in the
+ *     documentation and/or other materials provided with the distribution.
+ *  3. Neither the name of the University nor the names of its
+ *     contributors may be used to endorse or promote products derived
+ *     from this software without specific prior written permission.
+ *
+ *  THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
+ *  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
+ *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ *  DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ *  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ *  CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ *  SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
+ *  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ *  LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ *  NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ *  SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef NFS_IDMAP_H
+#define NFS_IDMAP_H
+
+/* XXX from bits/utmp.h  */
+#define IDMAP_NAMESZ  128
+
+#define IDMAP_TYPE_USER  0
+#define IDMAP_TYPE_GROUP 1
+
+#define IDMAP_CONV_IDTONAME 0
+#define IDMAP_CONV_NAMETOID 1
+
+#define IDMAP_STATUS_INVALIDMSG 0x01
+#define IDMAP_STATUS_AGAIN      0x02
+#define IDMAP_STATUS_LOOKUPFAIL 0x04
+#define IDMAP_STATUS_SUCCESS    0x08
+
+struct idmap_msg {
+	u_int8_t  im_type;
+	u_int8_t  im_conv;
+	char      im_name[IDMAP_NAMESZ];
+	u_int32_t im_id;
+	u_int8_t  im_status;
+};
+
+#ifdef __KERNEL__
+void      *nfs_idmap_new(struct nfs_server *);
+void       nfs_idmap_delete(struct nfs_server *);
+int        nfs_idmap_id(struct nfs_server *, u_int8_t, char *, u_int,  uid_t *);
+int        nfs_idmap_name(struct nfs_server *, u_int8_t, uid_t, char *, u_int *);
+#endif /* __KERNEL__ */
+
+#endif /* NFS_IDMAP_H */

include/linux/nfs_xdr.h

@@ -87,6 +87,67 @@ struct nfs_pathconf {
 	__u32			max_namelen; /* max name length */
 };
 
+/*
+ * Arguments to the open call.
+ */
+struct nfs_openargs {
+	struct nfs_fh *         fh;
+	__u32                   seqid;
+	__u32                   share_access;
+	__u64                   clientid;
+	__u32                   id;
+	__u32                   opentype;
+	__u32                   createmode;
+	union {
+		struct iattr *  attrs;    /* UNCHECKED, GUARDED */
+		nfs4_verifier   verifier; /* EXCLUSIVE */
+	} u;
+	struct qstr *           name;
+	struct nfs4_getattr *   f_getattr;
+	struct nfs4_getattr *   d_getattr;
+	struct nfs_server *     server;	 /* Needed for ID mapping */
+};
+
+struct nfs_openres {
+	__u32                   status;
+	nfs4_stateid            stateid;
+	struct nfs_fh           fh;
+	struct nfs4_change_info * cinfo;
+	__u32                   rflags;
+	struct nfs4_getattr *   f_getattr;
+	struct nfs4_getattr *   d_getattr;
+	struct nfs_server *     server;
+};
+
+/*
+ * Arguments to the open_confirm call.
+ */
+struct nfs_open_confirmargs {
+	struct nfs_fh *         fh;
+	nfs4_stateid            stateid;
+	__u32                   seqid;
+};
+
+struct nfs_open_confirmres {
+	__u32                   status;
+	nfs4_stateid            stateid;
+};
+
+/*
+ * Arguments to the close call.
+ */
+struct nfs_closeargs {
+	struct nfs_fh *         fh;
+	nfs4_stateid            stateid;
+	__u32                   seqid;
+};
+
+struct nfs_closeres {
+	__u32                   status;
+	nfs4_stateid            stateid;
+};
+
+
 /*
  * Arguments to the read call.
  */
@@ -98,6 +159,7 @@ struct nfs_pathconf {
 
 struct nfs_readargs {
 	struct nfs_fh *		fh;
+	nfs4_stateid		stateid;
 	__u64			offset;
 	__u32			count;
 	unsigned int		pgbase;
@@ -120,6 +182,7 @@ struct nfs_readres {
 
 struct nfs_writeargs {
 	struct nfs_fh *		fh;
+	nfs4_stateid		stateid;
 	__u64			offset;
 	__u32			count;
 	enum nfs3_stable_how	stable;
@@ -182,6 +245,19 @@ struct nfs_renameargs {
 	unsigned int		tolen;
 };
 
+struct nfs_setattrargs {
+	struct nfs_fh *                 fh;
+	nfs4_stateid                    stateid;
+	struct iattr *                  iap;
+	struct nfs4_getattr *           attr;
+	struct nfs_server *             server; /* Needed for name mapping */
+};
+
+struct nfs_setattrres {
+	struct nfs4_getattr *           attr;
+	struct nfs_server *             server;
+};
+
 struct nfs_linkargs {
 	struct nfs_fh *		fromfh;
 	struct nfs_fh *		tofh;
@@ -597,6 +673,7 @@ struct nfs_rpc_ops {
 	void	(*read_setup)   (struct nfs_read_data *, unsigned int count);
 	void	(*write_setup)  (struct nfs_write_data *, unsigned int count, int how);
 	void	(*commit_setup) (struct nfs_write_data *, u64 start, u32 len, int how);
+	int	(*file_open)   (struct inode *, struct file *);
 };
 
 /*

net/sunrpc/xprt.c

@@ -625,7 +625,8 @@ skb_read_bits(skb_reader_t *desc, void *to, size_t len)
 {
 	if (len > desc->count)
 		len = desc->count;
-	skb_copy_bits(desc->skb, desc->offset, to, len);
+	if (skb_copy_bits(desc->skb, desc->offset, to, len))
+		return 0;
 	desc->count -= len;
 	desc->offset += len;
 	return len;
@@ -669,11 +670,15 @@ csum_partial_copy_to_xdr(struct xdr_buf *xdr, struct sk_buff *skb)
 		csum2 = skb_checksum(skb, desc.offset, skb->len - desc.offset, 0);
 		desc.csum = csum_block_add(desc.csum, csum2, desc.offset);
 	}
+	if (desc.count)
+		return -1;
 	if ((unsigned short)csum_fold(desc.csum))
 		return -1;
 	return 0;
 no_checksum:
 	xdr_partial_copy_from_skb(xdr, 0, &desc, skb_read_bits);
+	if (desc.count)
+		return -1;
 	return 0;
 }
 
@@ -750,7 +755,8 @@ tcp_copy_data(skb_reader_t *desc, void *p, size_t len)
 {
 	if (len > desc->count)
 		len = desc->count;
-	skb_copy_bits(desc->skb, desc->offset, p, len);
+	if (skb_copy_bits(desc->skb, desc->offset, p, len))
+		return 0;
 	desc->offset += len;
 	desc->count -= len;
 	return len;