NFSv4: ACL support for the NFSv4 client: write

 Client-side write support for NFSv4 ACLs.

 Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
 Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
---
 inode.c    |   11 ++++++++++-
 nfs4_fs.h  |    1 +
 nfs4proc.c |   24 ++++++++++++++++++++++++
 3 files changed, 35 insertions(+), 1 deletion(-)

Index: linux-2.6.11/fs/nfs/inode.c
===================================================================
--- linux-2.6.11.orig/fs/nfs/inode.c
+++ linux-2.6.11/fs/nfs/inode.c
@@ -1502,7 +1502,16 @@ int
 nfs4_setxattr(struct dentry *dentry, const char *key, const void *buf,
 		size_t buflen, int flags)
 {
-	return -EOPNOTSUPP;
+	struct inode *inode = dentry->d_inode;
+
+	if (strcmp(key, XATTR_NAME_NFSV4_ACL) != 0)
+		return -EINVAL;
+
+	if (!S_ISREG(inode->i_mode) &&
+	    (!S_ISDIR(inode->i_mode) || inode->i_mode & S_ISVTX))
+		return -EPERM;
+
+	return nfs4_proc_set_acl(inode, buf, buflen);
 }
 
 /* The getxattr man page suggests returning -ENODATA for unknown attributes,
Index: linux-2.6.11/fs/nfs/nfs4proc.c
===================================================================
--- linux-2.6.11.orig/fs/nfs/nfs4proc.c
+++ linux-2.6.11/fs/nfs/nfs4proc.c
@@ -2218,6 +2218,30 @@ nfs4_proc_get_acl(struct inode *inode, v
 	return ret;
 }
 
+int
+nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
+{
+	struct nfs_server *server = NFS_SERVER(inode);
+	struct page *pages[NFS4ACL_MAXPAGES];
+	struct nfs_setaclargs arg = {
+		.fh		= NFS_FH(inode),
+		.acl_pages	= pages,
+		.acl_len	= buflen,
+	};
+	struct rpc_message msg = {
+		.rpc_proc	= &nfs4_procedures[NFSPROC4_CLNT_SETACL],
+		.rpc_argp	= &arg,
+		.rpc_resp	= NULL,
+	};
+	int ret;
+
+	if (!nfs4_server_supports_acls(server))
+		return -EOPNOTSUPP;
+	buf_to_pages(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
+	ret = rpc_call_sync(NFS_SERVER(inode)->client, &msg, 0);
+	return ret;
+}
+
 static int
 nfs4_async_handle_error(struct rpc_task *task, struct nfs_server *server)
 {
Index: linux-2.6.11/fs/nfs/nfs4_fs.h
===================================================================
--- linux-2.6.11.orig/fs/nfs/nfs4_fs.h
+++ linux-2.6.11/fs/nfs/nfs4_fs.h
@@ -194,6 +194,7 @@ extern int nfs4_do_close(struct inode *i
 extern struct inode *nfs4_atomic_open(struct inode *, struct dentry *, struct nameidata *);
 extern int nfs4_open_revalidate(struct inode *, struct dentry *, int);
 extern ssize_t nfs4_proc_get_acl(struct inode *, void *buf, size_t buflen);
+extern int nfs4_proc_set_acl(struct inode *, const void *buf, size_t buflen);
 
 extern struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops;
 extern struct nfs4_state_recovery_ops nfs4_network_partition_recovery_ops;