diff --git a/fs/coda/coda_fs_i.h b/fs/coda/coda_fs_i.h
index c99d574d1c43..1763ff95d865 100644
--- a/fs/coda/coda_fs_i.h
+++ b/fs/coda/coda_fs_i.h
@@ -40,6 +40,7 @@ struct coda_file_info {
 	int		   cfi_magic;	  /* magic number */
 	struct file	  *cfi_container; /* container file for this cnode */
 	unsigned int	   cfi_mapcount;  /* nr of times this file is mapped */
+	bool		   cfi_access_intent; /* is access intent supported */
 };
 
 /* flags */
diff --git a/fs/coda/coda_psdev.h b/fs/coda/coda_psdev.h
index 801423cbbdfc..52da08c770b0 100644
--- a/fs/coda/coda_psdev.h
+++ b/fs/coda/coda_psdev.h
@@ -83,6 +83,9 @@ int coda_downcall(struct venus_comm *vcp, int opcode, union outputArgs *out,
 		  size_t nbytes);
 int venus_fsync(struct super_block *sb, struct CodaFid *fid);
 int venus_statfs(struct dentry *dentry, struct kstatfs *sfs);
+int venus_access_intent(struct super_block *sb, struct CodaFid *fid,
+			bool *access_intent_supported,
+			size_t count, loff_t ppos, int type);
 
 /*
  * Statistics
diff --git a/fs/coda/file.c b/fs/coda/file.c
index 0dbd13ab72e3..128d63df5bfb 100644
--- a/fs/coda/file.c
+++ b/fs/coda/file.c
@@ -20,6 +20,7 @@
 #include <linux/string.h>
 #include <linux/slab.h>
 #include <linux/uaccess.h>
+#include <linux/uio.h>
 
 #include <linux/coda.h>
 #include "coda_psdev.h"
@@ -37,9 +38,25 @@ static ssize_t
 coda_file_read_iter(struct kiocb *iocb, struct iov_iter *to)
 {
 	struct file *coda_file = iocb->ki_filp;
+	struct inode *coda_inode = file_inode(coda_file);
 	struct coda_file_info *cfi = coda_ftoc(coda_file);
+	loff_t ki_pos = iocb->ki_pos;
+	size_t count = iov_iter_count(to);
+	ssize_t ret;
+
+	ret = venus_access_intent(coda_inode->i_sb, coda_i2f(coda_inode),
+				  &cfi->cfi_access_intent,
+				  count, ki_pos, CODA_ACCESS_TYPE_READ);
+	if (ret)
+		goto finish_read;
 
-	return vfs_iter_read(cfi->cfi_container, to, &iocb->ki_pos, 0);
+	ret = vfs_iter_read(cfi->cfi_container, to, &iocb->ki_pos, 0);
+
+finish_read:
+	venus_access_intent(coda_inode->i_sb, coda_i2f(coda_inode),
+			    &cfi->cfi_access_intent,
+			    count, ki_pos, CODA_ACCESS_TYPE_READ_FINISH);
+	return ret;
 }
 
 static ssize_t
@@ -48,10 +65,17 @@ coda_file_write_iter(struct kiocb *iocb, struct iov_iter *to)
 	struct file *coda_file = iocb->ki_filp;
 	struct inode *coda_inode = file_inode(coda_file);
 	struct coda_file_info *cfi = coda_ftoc(coda_file);
-	struct file *host_file;
+	struct file *host_file = cfi->cfi_container;
+	loff_t ki_pos = iocb->ki_pos;
+	size_t count = iov_iter_count(to);
 	ssize_t ret;
 
-	host_file = cfi->cfi_container;
+	ret = venus_access_intent(coda_inode->i_sb, coda_i2f(coda_inode),
+				  &cfi->cfi_access_intent,
+				  count, ki_pos, CODA_ACCESS_TYPE_WRITE);
+	if (ret)
+		goto finish_write;
+
 	file_start_write(host_file);
 	inode_lock(coda_inode);
 	ret = vfs_iter_write(cfi->cfi_container, to, &iocb->ki_pos, 0);
@@ -60,6 +84,11 @@ coda_file_write_iter(struct kiocb *iocb, struct iov_iter *to)
 	coda_inode->i_mtime = coda_inode->i_ctime = current_time(coda_inode);
 	inode_unlock(coda_inode);
 	file_end_write(host_file);
+
+finish_write:
+	venus_access_intent(coda_inode->i_sb, coda_i2f(coda_inode),
+			    &cfi->cfi_access_intent,
+			    count, ki_pos, CODA_ACCESS_TYPE_WRITE_FINISH);
 	return ret;
 }
 
@@ -94,29 +123,35 @@ coda_vm_close(struct vm_area_struct *vma)
 static int
 coda_file_mmap(struct file *coda_file, struct vm_area_struct *vma)
 {
-	struct coda_file_info *cfi;
+	struct inode *coda_inode = file_inode(coda_file);
+	struct coda_file_info *cfi = coda_ftoc(coda_file);
+	struct file *host_file = cfi->cfi_container;
+	struct inode *host_inode = file_inode(host_file);
 	struct coda_inode_info *cii;
-	struct file *host_file;
-	struct inode *coda_inode, *host_inode;
 	struct coda_vm_ops *cvm_ops;
+	loff_t ppos;
+	size_t count;
 	int ret;
 
-	cfi = coda_ftoc(coda_file);
-	host_file = cfi->cfi_container;
-
 	if (!host_file->f_op->mmap)
 		return -ENODEV;
 
 	if (WARN_ON(coda_file != vma->vm_file))
 		return -EIO;
 
+	count = vma->vm_end - vma->vm_start;
+	ppos = vma->vm_pgoff * PAGE_SIZE;
+
+	ret = venus_access_intent(coda_inode->i_sb, coda_i2f(coda_inode),
+				  &cfi->cfi_access_intent,
+				  count, ppos, CODA_ACCESS_TYPE_MMAP);
+	if (ret)
+		return ret;
+
 	cvm_ops = kmalloc(sizeof(struct coda_vm_ops), GFP_KERNEL);
 	if (!cvm_ops)
 		return -ENOMEM;
 
-	coda_inode = file_inode(coda_file);
-	host_inode = file_inode(host_file);
-
 	cii = ITOC(coda_inode);
 	spin_lock(&cii->c_lock);
 	coda_file->f_mapping = host_file->f_mapping;
@@ -188,6 +223,8 @@ int coda_open(struct inode *coda_inode, struct file *coda_file)
 	cfi->cfi_magic = CODA_MAGIC;
 	cfi->cfi_mapcount = 0;
 	cfi->cfi_container = host_file;
+	/* assume access intents are supported unless we hear otherwise */
+	cfi->cfi_access_intent = true;
 
 	BUG_ON(coda_file->private_data != NULL);
 	coda_file->private_data = cfi;
diff --git a/fs/coda/psdev.c b/fs/coda/psdev.c
index 482b7ba0339c..c2eb1a73f7d0 100644
--- a/fs/coda/psdev.c
+++ b/fs/coda/psdev.c
@@ -392,7 +392,7 @@ MODULE_AUTHOR("Jan Harkes, Peter J. Braam");
 MODULE_DESCRIPTION("Coda Distributed File System VFS interface");
 MODULE_ALIAS_CHARDEV_MAJOR(CODA_PSDEV_MAJOR);
 MODULE_LICENSE("GPL");
-MODULE_VERSION("6.11");
+MODULE_VERSION("7.0");
 
 static int __init init_coda(void)
 {
diff --git a/fs/coda/upcall.c b/fs/coda/upcall.c
index 15c0e4fdb0e3..eb3b1898da46 100644
--- a/fs/coda/upcall.c
+++ b/fs/coda/upcall.c
@@ -569,6 +569,47 @@ int venus_statfs(struct dentry *dentry, struct kstatfs *sfs)
         return error;
 }
 
+int venus_access_intent(struct super_block *sb, struct CodaFid *fid,
+			bool *access_intent_supported,
+			size_t count, loff_t ppos, int type)
+{
+	union inputArgs *inp;
+	union outputArgs *outp;
+	int insize, outsize, error;
+	bool finalizer =
+		type == CODA_ACCESS_TYPE_READ_FINISH ||
+		type == CODA_ACCESS_TYPE_WRITE_FINISH;
+
+	if (!*access_intent_supported && !finalizer)
+		return 0;
+
+	insize = SIZE(access_intent);
+	UPARG(CODA_ACCESS_INTENT);
+
+	inp->coda_access_intent.VFid = *fid;
+	inp->coda_access_intent.count = count;
+	inp->coda_access_intent.pos = ppos;
+	inp->coda_access_intent.type = type;
+
+	error = coda_upcall(coda_vcp(sb), insize,
+			    finalizer ? NULL : &outsize, inp);
+
+	/*
+	 * we have to free the request buffer for synchronous upcalls
+	 * or when asynchronous upcalls fail, but not when asynchronous
+	 * upcalls succeed
+	 */
+	if (!finalizer || error)
+		kvfree(inp);
+
+	/* Chunked access is not supported or an old Coda client */
+	if (error == -EOPNOTSUPP) {
+		*access_intent_supported = false;
+		error = 0;
+	}
+	return error;
+}
+
 /*
  * coda_upcall and coda_downcall routines.
  */
@@ -598,10 +639,12 @@ static void coda_unblock_signals(sigset_t *old)
  * has seen them,
  * - CODA_CLOSE or CODA_RELEASE upcall  (to avoid reference count problems)
  * - CODA_STORE				(to avoid data loss)
+ * - CODA_ACCESS_INTENT                 (to avoid reference count problems)
  */
 #define CODA_INTERRUPTIBLE(r) (!coda_hard && \
 			       (((r)->uc_opcode != CODA_CLOSE && \
 				 (r)->uc_opcode != CODA_STORE && \
+				 (r)->uc_opcode != CODA_ACCESS_INTENT && \
 				 (r)->uc_opcode != CODA_RELEASE) || \
 				(r)->uc_flags & CODA_REQ_READ))
 
@@ -687,21 +730,25 @@ static int coda_upcall(struct venus_comm *vcp,
 		goto exit;
 	}
 
+	buffer->ih.unique = ++vcp->vc_seq;
+
 	req->uc_data = (void *)buffer;
-	req->uc_flags = 0;
+	req->uc_flags = outSize ? 0 : CODA_REQ_ASYNC;
 	req->uc_inSize = inSize;
-	req->uc_outSize = *outSize ? *outSize : inSize;
-	req->uc_opcode = ((union inputArgs *)buffer)->ih.opcode;
-	req->uc_unique = ++vcp->vc_seq;
+	req->uc_outSize = (outSize && *outSize) ? *outSize : inSize;
+	req->uc_opcode = buffer->ih.opcode;
+	req->uc_unique = buffer->ih.unique;
 	init_waitqueue_head(&req->uc_sleep);
 
-	/* Fill in the common input args. */
-	((union inputArgs *)buffer)->ih.unique = req->uc_unique;
-
 	/* Append msg to pending queue and poke Venus. */
 	list_add_tail(&req->uc_chain, &vcp->vc_pending);
-
 	wake_up_interruptible(&vcp->vc_waitq);
+
+	if (req->uc_flags & CODA_REQ_ASYNC) {
+		mutex_unlock(&vcp->vc_mutex);
+		return 0;
+	}
+
 	/* We can be interrupted while we wait for Venus to process
 	 * our request.  If the interrupt occurs before Venus has read
 	 * the request, we dequeue and return. If it occurs after the
@@ -743,20 +790,20 @@ static int coda_upcall(struct venus_comm *vcp,
 	sig_req = kmalloc(sizeof(struct upc_req), GFP_KERNEL);
 	if (!sig_req) goto exit;
 
-	sig_req->uc_data = kvzalloc(sizeof(struct coda_in_hdr), GFP_KERNEL);
-	if (!sig_req->uc_data) {
+	sig_inputArgs = kvzalloc(sizeof(struct coda_in_hdr), GFP_KERNEL);
+	if (!sig_inputArgs) {
 		kfree(sig_req);
 		goto exit;
 	}
 
 	error = -EINTR;
-	sig_inputArgs = (union inputArgs *)sig_req->uc_data;
 	sig_inputArgs->ih.opcode = CODA_SIGNAL;
 	sig_inputArgs->ih.unique = req->uc_unique;
 
 	sig_req->uc_flags = CODA_REQ_ASYNC;
 	sig_req->uc_opcode = sig_inputArgs->ih.opcode;
 	sig_req->uc_unique = sig_inputArgs->ih.unique;
+	sig_req->uc_data = (void *)sig_inputArgs;
 	sig_req->uc_inSize = sizeof(struct coda_in_hdr);
 	sig_req->uc_outSize = sizeof(struct coda_in_hdr);
 
@@ -911,4 +958,3 @@ int coda_downcall(struct venus_comm *vcp, int opcode, union outputArgs *out,
 	iput(inode);
 	return 0;
 }
-
diff --git a/include/uapi/linux/coda.h b/include/uapi/linux/coda.h
index 5dba636b6e11..79ba2daea395 100644
--- a/include/uapi/linux/coda.h
+++ b/include/uapi/linux/coda.h
@@ -271,7 +271,8 @@ struct coda_statfs {
 #define CODA_STATFS	 34
 #define CODA_STORE	 35
 #define CODA_RELEASE	 36
-#define CODA_NCALLS 37
+#define CODA_ACCESS_INTENT 37
+#define CODA_NCALLS 38
 
 #define DOWNCALL(opcode) (opcode >= CODA_REPLACE && opcode <= CODA_PURGEFID)
 
@@ -281,8 +282,12 @@ struct coda_statfs {
 
 #define CIOC_KERNEL_VERSION _IOWR('c', 10, size_t)
 
+//      CODA_KERNEL_VERSION 0 /* don't care about kernel version number */
+//      CODA_KERNEL_VERSION 1 /* The old venus 4.6 compatible interface */
+//      CODA_KERNEL_VERSION 2 /* venus_lookup gets an extra parameter */
 //      CODA_KERNEL_VERSION 3 /* 128-bit file identifiers */
-#define CODA_KERNEL_VERSION 4 /* 64-bit timespec */
+//      CODA_KERNEL_VERSION 4 /* 64-bit timespec */
+#define CODA_KERNEL_VERSION 5 /* access intent support */
 
 /*
  *        Venus <-> Coda  RPC arguments
@@ -637,6 +642,25 @@ struct coda_statfs_out {
     struct coda_statfs stat;
 };
 
+#define CODA_ACCESS_TYPE_READ		1
+#define CODA_ACCESS_TYPE_WRITE		2
+#define CODA_ACCESS_TYPE_MMAP		3
+#define CODA_ACCESS_TYPE_READ_FINISH	4
+#define CODA_ACCESS_TYPE_WRITE_FINISH	5
+
+/* coda_access_intent: NO_OUT */
+struct coda_access_intent_in {
+	struct coda_in_hdr ih;
+	struct CodaFid VFid;
+	int count;
+	int pos;
+	int type;
+};
+
+struct coda_access_intent_out {
+	struct coda_out_hdr out;
+};
+
 /* 
  * Occasionally, we don't cache the fid returned by CODA_LOOKUP. 
  * For instance, if the fid is inconsistent. 
@@ -668,6 +692,7 @@ union inputArgs {
     struct coda_open_by_fd_in coda_open_by_fd;
     struct coda_open_by_path_in coda_open_by_path;
     struct coda_statfs_in coda_statfs;
+	struct coda_access_intent_in coda_access_intent;
 };
 
 union outputArgs {
