diff --git a/fs/afs/Makefile b/fs/afs/Makefile
index 66bdc21..cca198b 100644
--- a/fs/afs/Makefile
+++ b/fs/afs/Makefile
@@ -15,6 +15,7 @@
 	mntpt.o \
 	proc.o \
 	rxrpc.o \
+	security.o \
 	server.o \
 	super.o \
 	vlclient.o \
diff --git a/fs/afs/afs.h b/fs/afs/afs.h
index b9d2d2c..d959092 100644
--- a/fs/afs/afs.h
+++ b/fs/afs/afs.h
@@ -14,6 +14,9 @@
 
 #include <linux/in.h>
 
+#define AFS_MAXCELLNAME	64		/* maximum length of a cell name */
+#define AFS_MAXVOLNAME	64		/* maximum length of a volume name */
+
 typedef unsigned			afs_volid_t;
 typedef unsigned			afs_vnodeid_t;
 typedef unsigned long long		afs_dataversion_t;
@@ -75,6 +78,26 @@
 };
 
 /*
+ * AFS security ACE access mask
+ */
+typedef u32 afs_access_t;
+#define AFS_ACE_READ		0x00000001U	/* - permission to read a file/dir */
+#define AFS_ACE_WRITE		0x00000002U	/* - permission to write/chmod a file */
+#define AFS_ACE_INSERT		0x00000004U	/* - permission to create dirent in a dir */
+#define AFS_ACE_LOOKUP		0x00000008U	/* - permission to lookup a file/dir in a dir */
+#define AFS_ACE_DELETE		0x00000010U	/* - permission to delete a dirent from a dir */
+#define AFS_ACE_LOCK		0x00000020U	/* - permission to lock a file */
+#define AFS_ACE_ADMINISTER	0x00000040U	/* - permission to change ACL */
+#define AFS_ACE_USER_A		0x01000000U	/* - 'A' user-defined permission */
+#define AFS_ACE_USER_B		0x02000000U	/* - 'B' user-defined permission */
+#define AFS_ACE_USER_C		0x04000000U	/* - 'C' user-defined permission */
+#define AFS_ACE_USER_D		0x08000000U	/* - 'D' user-defined permission */
+#define AFS_ACE_USER_E		0x10000000U	/* - 'E' user-defined permission */
+#define AFS_ACE_USER_F		0x20000000U	/* - 'F' user-defined permission */
+#define AFS_ACE_USER_G		0x40000000U	/* - 'G' user-defined permission */
+#define AFS_ACE_USER_H		0x80000000U	/* - 'H' user-defined permission */
+
+/*
  * AFS file status information
  */
 struct afs_file_status {
@@ -87,8 +110,8 @@
 	afs_dataversion_t	data_version;	/* current data version */
 	unsigned		author;		/* author ID */
 	unsigned		owner;		/* owner ID */
-	unsigned		caller_access;	/* access rights for authenticated caller */
-	unsigned		anon_access;	/* access rights for unauthenticated caller */
+	afs_access_t		caller_access;	/* access rights for authenticated caller */
+	afs_access_t		anon_access;	/* access rights for unauthenticated caller */
 	umode_t			mode;		/* UNIX mode */
 	struct afs_fid		parent;		/* parent file ID */
 	time_t			mtime_client;	/* last time client changed data */
diff --git a/fs/afs/callback.c b/fs/afs/callback.c
index 6112155..e674beb 100644
--- a/fs/afs/callback.c
+++ b/fs/afs/callback.c
@@ -72,7 +72,10 @@
 		return; /* someone else is dealing with it */
 
 	if (test_bit(AFS_VNODE_CB_BROKEN, &vnode->flags)) {
-		if (afs_vnode_fetch_status(vnode) < 0)
+		if (S_ISDIR(vnode->vfs_inode.i_mode))
+			afs_clear_permits(vnode);
+
+		if (afs_vnode_fetch_status(vnode, NULL, NULL) < 0)
 			goto out;
 
 		if (test_bit(AFS_VNODE_DELETED, &vnode->flags))
diff --git a/fs/afs/cell.c b/fs/afs/cell.c
index 733c602..9b1311a 100644
--- a/fs/afs/cell.c
+++ b/fs/afs/cell.c
@@ -11,6 +11,9 @@
 
 #include <linux/module.h>
 #include <linux/slab.h>
+#include <linux/key.h>
+#include <linux/ctype.h>
+#include <keys/rxrpc-type.h>
 #include "internal.h"
 
 DECLARE_RWSEM(afs_proc_cells_sem);
@@ -23,45 +26,43 @@
 static struct afs_cell *afs_cell_root;
 
 /*
- * create a cell record
- * - "name" is the name of the cell
- * - "vllist" is a colon separated list of IP addresses in "a.b.c.d" format
+ * allocate a cell record and fill in its name, VL server address list and
+ * allocate an anonymous key
  */
-struct afs_cell *afs_cell_create(const char *name, char *vllist)
+static struct afs_cell *afs_cell_alloc(const char *name, char *vllist)
 {
 	struct afs_cell *cell;
-	char *next;
+	size_t namelen;
+	char keyname[4 + AFS_MAXCELLNAME + 1], *cp, *dp, *next;
 	int ret;
 
 	_enter("%s,%s", name, vllist);
 
 	BUG_ON(!name); /* TODO: want to look up "this cell" in the cache */
 
+	namelen = strlen(name);
+	if (namelen > AFS_MAXCELLNAME)
+		return ERR_PTR(-ENAMETOOLONG);
+
 	/* allocate and initialise a cell record */
-	cell = kmalloc(sizeof(struct afs_cell) + strlen(name) + 1, GFP_KERNEL);
+	cell = kzalloc(sizeof(struct afs_cell) + namelen + 1, GFP_KERNEL);
 	if (!cell) {
 		_leave(" = -ENOMEM");
 		return ERR_PTR(-ENOMEM);
 	}
 
-	down_write(&afs_cells_sem);
+	memcpy(cell->name, name, namelen);
+	cell->name[namelen] = 0;
 
-	memset(cell, 0, sizeof(struct afs_cell));
 	atomic_set(&cell->usage, 1);
-
 	INIT_LIST_HEAD(&cell->link);
-
 	rwlock_init(&cell->servers_lock);
 	INIT_LIST_HEAD(&cell->servers);
-
 	init_rwsem(&cell->vl_sem);
 	INIT_LIST_HEAD(&cell->vl_list);
 	spin_lock_init(&cell->vl_lock);
 
-	strcpy(cell->name, name);
-
 	/* fill in the VL server list from the rest of the string */
-	ret = -EINVAL;
 	do {
 		unsigned a, b, c, d;
 
@@ -70,18 +71,73 @@
 			*next++ = 0;
 
 		if (sscanf(vllist, "%u.%u.%u.%u", &a, &b, &c, &d) != 4)
-			goto badaddr;
+			goto bad_address;
 
 		if (a > 255 || b > 255 || c > 255 || d > 255)
-			goto badaddr;
+			goto bad_address;
 
 		cell->vl_addrs[cell->vl_naddrs++].s_addr =
 			htonl((a << 24) | (b << 16) | (c << 8) | d);
 
-		if (cell->vl_naddrs >= AFS_CELL_MAX_ADDRS)
-			break;
+	} while (cell->vl_naddrs < AFS_CELL_MAX_ADDRS && (vllist = next));
 
-	} while ((vllist = next));
+	/* create a key to represent an anonymous user */
+	memcpy(keyname, "afs@", 4);
+	dp = keyname + 4;
+	cp = cell->name;
+	do {
+		*dp++ = toupper(*cp);
+	} while (*cp++);
+	cell->anonymous_key = key_alloc(&key_type_rxrpc, keyname, 0, 0, current,
+					KEY_POS_SEARCH, KEY_ALLOC_NOT_IN_QUOTA);
+	if (IS_ERR(cell->anonymous_key)) {
+		_debug("no key");
+		ret = PTR_ERR(cell->anonymous_key);
+		goto error;
+	}
+
+	ret = key_instantiate_and_link(cell->anonymous_key, NULL, 0,
+				       NULL, NULL);
+	if (ret < 0) {
+		_debug("instantiate failed");
+		goto error;
+	}
+
+	_debug("anon key %p{%x}",
+	       cell->anonymous_key, key_serial(cell->anonymous_key));
+
+	_leave(" = %p", cell);
+	return cell;
+
+bad_address:
+	printk(KERN_ERR "kAFS: bad VL server IP address\n");
+	ret = -EINVAL;
+error:
+	key_put(cell->anonymous_key);
+	kfree(cell);
+	_leave(" = %d", ret);
+	return ERR_PTR(ret);
+}
+
+/*
+ * create a cell record
+ * - "name" is the name of the cell
+ * - "vllist" is a colon separated list of IP addresses in "a.b.c.d" format
+ */
+struct afs_cell *afs_cell_create(const char *name, char *vllist)
+{
+	struct afs_cell *cell;
+	int ret;
+
+	_enter("%s,%s", name, vllist);
+
+	cell = afs_cell_alloc(name, vllist);
+	if (IS_ERR(cell)) {
+		_leave(" = %ld", PTR_ERR(cell));
+		return cell;
+	}
+
+	down_write(&afs_cells_sem);
 
 	/* add a proc directory for this cell */
 	ret = afs_proc_cell_setup(cell);
@@ -109,10 +165,9 @@
 	_leave(" = %p", cell);
 	return cell;
 
-badaddr:
-	printk(KERN_ERR "kAFS: bad VL server IP address\n");
 error:
 	up_write(&afs_cells_sem);
+	key_put(cell->anonymous_key);
 	kfree(cell);
 	_leave(" = %d", ret);
 	return ERR_PTR(ret);
@@ -301,6 +356,7 @@
 	cachefs_relinquish_cookie(cell->cache, 0);
 #endif
 
+	key_put(cell->anonymous_key);
 	kfree(cell);
 
 	_leave(" [destroyed]");
diff --git a/fs/afs/cmservice.c b/fs/afs/cmservice.c
index c714117..c3ec57a 100644
--- a/fs/afs/cmservice.c
+++ b/fs/afs/cmservice.c
@@ -28,6 +28,7 @@
  * CB.CallBack operation type
  */
 static const struct afs_call_type afs_SRXCBCallBack = {
+	.name		= "CB.CallBack",
 	.deliver	= afs_deliver_cb_callback,
 	.abort_to_error	= afs_abort_to_error,
 	.destructor	= afs_cm_destructor,
@@ -37,6 +38,7 @@
  * CB.InitCallBackState operation type
  */
 static const struct afs_call_type afs_SRXCBInitCallBackState = {
+	.name		= "CB.InitCallBackState",
 	.deliver	= afs_deliver_cb_init_call_back_state,
 	.abort_to_error	= afs_abort_to_error,
 	.destructor	= afs_cm_destructor,
@@ -46,6 +48,7 @@
  * CB.Probe operation type
  */
 static const struct afs_call_type afs_SRXCBProbe = {
+	.name		= "CB.Probe",
 	.deliver	= afs_deliver_cb_probe,
 	.abort_to_error	= afs_abort_to_error,
 	.destructor	= afs_cm_destructor,
diff --git a/fs/afs/dir.c b/fs/afs/dir.c
index d7697f6..8736841 100644
--- a/fs/afs/dir.c
+++ b/fs/afs/dir.c
@@ -15,6 +15,7 @@
 #include <linux/slab.h>
 #include <linux/fs.h>
 #include <linux/pagemap.h>
+#include <linux/ctype.h>
 #include "internal.h"
 
 static struct dentry *afs_dir_lookup(struct inode *dir, struct dentry *dentry,
@@ -28,11 +29,13 @@
 
 const struct file_operations afs_dir_file_operations = {
 	.open		= afs_dir_open,
+	.release	= afs_release,
 	.readdir	= afs_dir_readdir,
 };
 
 const struct inode_operations afs_dir_inode_operations = {
 	.lookup		= afs_dir_lookup,
+	.permission	= afs_permission,
 	.getattr	= afs_inode_getattr,
 #if 0 /* TODO */
 	.create		= afs_dir_create,
@@ -169,13 +172,17 @@
 /*
  * get a page into the pagecache
  */
-static struct page *afs_dir_get_page(struct inode *dir, unsigned long index)
+static struct page *afs_dir_get_page(struct inode *dir, unsigned long index,
+				     struct key *key)
 {
 	struct page *page;
+	struct file file = {
+		.private_data = key,
+	};
 
 	_enter("{%lu},%lu", dir->i_ino, index);
 
-	page = read_mapping_page(dir->i_mapping, index, NULL);
+	page = read_mapping_page(dir->i_mapping, index, &file);
 	if (!IS_ERR(page)) {
 		wait_on_page_locked(page);
 		kmap(page);
@@ -207,8 +214,7 @@
 	if (test_bit(AFS_VNODE_DELETED, &AFS_FS_I(inode)->flags))
 		return -ENOENT;
 
-	_leave(" = 0");
-	return 0;
+	return afs_open(inode, file);
 }
 
 /*
@@ -311,7 +317,7 @@
  * iterate through the data blob that lists the contents of an AFS directory
  */
 static int afs_dir_iterate(struct inode *dir, unsigned *fpos, void *cookie,
-			   filldir_t filldir)
+			   filldir_t filldir, struct key *key)
 {
 	union afs_dir_block *dblock;
 	struct afs_dir_page *dbuf;
@@ -336,7 +342,7 @@
 		blkoff = *fpos & ~(sizeof(union afs_dir_block) - 1);
 
 		/* fetch the appropriate page from the directory */
-		page = afs_dir_get_page(dir, blkoff / PAGE_SIZE);
+		page = afs_dir_get_page(dir, blkoff / PAGE_SIZE, key);
 		if (IS_ERR(page)) {
 			ret = PTR_ERR(page);
 			break;
@@ -381,9 +387,11 @@
 	_enter("{%Ld,{%lu}}",
 	       file->f_pos, file->f_path.dentry->d_inode->i_ino);
 
+	ASSERT(file->private_data != NULL);
+
 	fpos = file->f_pos;
 	ret = afs_dir_iterate(file->f_path.dentry->d_inode, &fpos,
-			      cookie, filldir);
+			      cookie, filldir, file->private_data);
 	file->f_pos = fpos;
 
 	_leave(" = %d", ret);
@@ -424,7 +432,7 @@
  * do a lookup in a directory
  */
 static int afs_do_lookup(struct inode *dir, struct dentry *dentry,
-			 struct afs_fid *fid)
+			 struct afs_fid *fid, struct key *key)
 {
 	struct afs_dir_lookup_cookie cookie;
 	struct afs_super_info *as;
@@ -442,7 +450,8 @@
 	cookie.found	= 0;
 
 	fpos = 0;
-	ret = afs_dir_iterate(dir, &fpos, &cookie, afs_dir_lookup_filldir);
+	ret = afs_dir_iterate(dir, &fpos, &cookie, afs_dir_lookup_filldir,
+			      key);
 	if (ret < 0) {
 		_leave(" = %d [iter]", ret);
 		return ret;
@@ -468,6 +477,7 @@
 	struct afs_vnode *vnode;
 	struct afs_fid fid;
 	struct inode *inode;
+	struct key *key;
 	int ret;
 
 	_enter("{%lu},%p{%s}", dir->i_ino, dentry, dentry->d_name.name);
@@ -483,14 +493,22 @@
 		return ERR_PTR(-ESTALE);
 	}
 
-	ret = afs_do_lookup(dir, dentry, &fid);
+	key = afs_request_key(vnode->volume->cell);
+	if (IS_ERR(key)) {
+		_leave(" = %ld [key]", PTR_ERR(key));
+		return ERR_PTR(PTR_ERR(key));
+	}
+
+	ret = afs_do_lookup(dir, dentry, &fid, key);
 	if (ret < 0) {
+		key_put(key);
 		_leave(" = %d [do]", ret);
 		return ERR_PTR(ret);
 	}
 
 	/* instantiate the dentry */
-	inode = afs_iget(dir->i_sb, &fid);
+	inode = afs_iget(dir->i_sb, key, &fid);
+	key_put(key);
 	if (IS_ERR(inode)) {
 		_leave(" = %ld", PTR_ERR(inode));
 		return ERR_PTR(PTR_ERR(inode));
@@ -559,6 +577,7 @@
 	struct afs_fid fid;
 	struct dentry *parent;
 	struct inode *inode, *dir;
+	struct key *key;
 	int ret;
 
 	vnode = AFS_FS_I(dentry->d_inode);
@@ -566,6 +585,10 @@
 	_enter("{sb=%p n=%s fl=%lx},",
 	       dentry->d_sb, dentry->d_name.name, vnode->flags);
 
+	key = afs_request_key(vnode->volume->cell);
+	if (IS_ERR(key))
+		key = NULL;
+
 	/* lock down the parent dentry so we can peer at it */
 	parent = dget_parent(dentry);
 
@@ -595,7 +618,7 @@
 		_debug("dir modified");
 
 		/* search the directory for this vnode */
-		ret = afs_do_lookup(dir, dentry, &fid);
+		ret = afs_do_lookup(dir, dentry, &fid, key);
 		if (ret == -ENOENT) {
 			_debug("%s: dirent not found", dentry->d_name.name);
 			goto not_found;
@@ -637,7 +660,7 @@
 	    test_bit(AFS_VNODE_CB_BROKEN, &vnode->flags)) {
 		_debug("%s: changed", dentry->d_name.name);
 		set_bit(AFS_VNODE_CB_BROKEN, &vnode->flags);
-		if (afs_vnode_fetch_status(vnode) < 0) {
+		if (afs_vnode_fetch_status(vnode, NULL, key) < 0) {
 			mutex_unlock(&vnode->cb_broken_lock);
 			goto out_bad;
 		}
@@ -667,6 +690,7 @@
 
 out_valid:
 	dput(parent);
+	key_put(key);
 	_leave(" = 1 [valid]");
 	return 1;
 
@@ -688,6 +712,7 @@
 	shrink_dcache_parent(dentry);
 	d_drop(dentry);
 	dput(parent);
+	key_put(key);
 
 	_leave(" = 0 [bad]");
 	return 0;
diff --git a/fs/afs/file.c b/fs/afs/file.c
index 6990327..101bbb8 100644
--- a/fs/afs/file.c
+++ b/fs/afs/file.c
@@ -17,17 +17,23 @@
 #include <linux/pagemap.h>
 #include "internal.h"
 
-#if 0
-static int afs_file_open(struct inode *inode, struct file *file);
-static int afs_file_release(struct inode *inode, struct file *file);
-#endif
-
 static int afs_file_readpage(struct file *file, struct page *page);
 static void afs_file_invalidatepage(struct page *page, unsigned long offset);
 static int afs_file_releasepage(struct page *page, gfp_t gfp_flags);
 
+const struct file_operations afs_file_operations = {
+	.open		= afs_open,
+	.release	= afs_release,
+	.llseek		= generic_file_llseek,
+	.read		= do_sync_read,
+	.aio_read	= generic_file_aio_read,
+	.mmap		= generic_file_readonly_mmap,
+	.sendfile	= generic_file_sendfile,
+};
+
 const struct inode_operations afs_file_inode_operations = {
 	.getattr	= afs_inode_getattr,
+	.permission	= afs_permission,
 };
 
 const struct address_space_operations afs_fs_aops = {
@@ -38,6 +44,41 @@
 };
 
 /*
+ * open an AFS file or directory and attach a key to it
+ */
+int afs_open(struct inode *inode, struct file *file)
+{
+	struct afs_vnode *vnode = AFS_FS_I(inode);
+	struct key *key;
+
+	_enter("{%x:%x},", vnode->fid.vid, vnode->fid.vnode);
+
+	key = afs_request_key(vnode->volume->cell);
+	if (IS_ERR(key)) {
+		_leave(" = %ld [key]", PTR_ERR(key));
+		return PTR_ERR(key);
+	}
+
+	file->private_data = key;
+	_leave(" = 0");
+	return 0;
+}
+
+/*
+ * release an AFS file or directory and discard its key
+ */
+int afs_release(struct inode *inode, struct file *file)
+{
+	struct afs_vnode *vnode = AFS_FS_I(inode);
+
+	_enter("{%x:%x},", vnode->fid.vid, vnode->fid.vnode);
+
+	key_put(file->private_data);
+	_leave(" = 0");
+	return 0;
+}
+
+/*
  * deal with notification that a page was read from the cache
  */
 #ifdef AFS_CACHING_SUPPORT
@@ -79,13 +120,18 @@
 {
 	struct afs_vnode *vnode;
 	struct inode *inode;
+	struct key *key;
 	size_t len;
 	off_t offset;
 	int ret;
 
 	inode = page->mapping->host;
 
-	_enter("{%lu},{%lu}", inode->i_ino, page->index);
+	ASSERT(file != NULL);
+	key = file->private_data;
+	ASSERT(key != NULL);
+
+	_enter("{%x},{%lu},{%lu}", key_serial(key), inode->i_ino, page->index);
 
 	vnode = AFS_FS_I(inode);
 
@@ -124,7 +170,7 @@
 
 		/* read the contents of the file from the server into the
 		 * page */
-		ret = afs_vnode_fetch_data(vnode, offset, len, page);
+		ret = afs_vnode_fetch_data(vnode, key, offset, len, page);
 		if (ret < 0) {
 			if (ret == -ENOENT) {
 				_debug("got NOENT from server"
diff --git a/fs/afs/fsclient.c b/fs/afs/fsclient.c
index 167ca61..321b489 100644
--- a/fs/afs/fsclient.c
+++ b/fs/afs/fsclient.c
@@ -148,6 +148,7 @@
  * FS.FetchStatus operation type
  */
 static const struct afs_call_type afs_RXFSFetchStatus = {
+	.name		= "FS.FetchStatus",
 	.deliver	= afs_deliver_fs_fetch_status,
 	.abort_to_error	= afs_abort_to_error,
 	.destructor	= afs_flat_call_destructor,
@@ -157,6 +158,7 @@
  * fetch the status information for a file
  */
 int afs_fs_fetch_file_status(struct afs_server *server,
+			     struct key *key,
 			     struct afs_vnode *vnode,
 			     struct afs_volsync *volsync,
 			     const struct afs_wait_mode *wait_mode)
@@ -164,12 +166,13 @@
 	struct afs_call *call;
 	__be32 *bp;
 
-	_enter("");
+	_enter(",%x,,,", key_serial(key));
 
 	call = afs_alloc_flat_call(&afs_RXFSFetchStatus, 16, 120);
 	if (!call)
 		return -ENOMEM;
 
+	call->key = key;
 	call->reply = vnode;
 	call->reply2 = volsync;
 	call->service_id = FS_SERVICE;
@@ -279,6 +282,7 @@
  * FS.FetchData operation type
  */
 static const struct afs_call_type afs_RXFSFetchData = {
+	.name		= "FS.FetchData",
 	.deliver	= afs_deliver_fs_fetch_data,
 	.abort_to_error	= afs_abort_to_error,
 	.destructor	= afs_flat_call_destructor,
@@ -288,6 +292,7 @@
  * fetch data from a file
  */
 int afs_fs_fetch_data(struct afs_server *server,
+		      struct key *key,
 		      struct afs_vnode *vnode,
 		      off_t offset, size_t length,
 		      struct page *buffer,
@@ -303,6 +308,7 @@
 	if (!call)
 		return -ENOMEM;
 
+	call->key = key;
 	call->reply = vnode;
 	call->reply2 = volsync;
 	call->reply3 = buffer;
@@ -338,6 +344,7 @@
  * FS.GiveUpCallBacks operation type
  */
 static const struct afs_call_type afs_RXFSGiveUpCallBacks = {
+	.name		= "FS.GiveUpCallBacks",
 	.deliver	= afs_deliver_fs_give_up_callbacks,
 	.abort_to_error	= afs_abort_to_error,
 	.destructor	= afs_flat_call_destructor,
diff --git a/fs/afs/inode.c b/fs/afs/inode.c
index 1886331..2273362 100644
--- a/fs/afs/inode.c
+++ b/fs/afs/inode.c
@@ -29,7 +29,7 @@
 /*
  * map the AFS file status to the inode member variables
  */
-static int afs_inode_map_status(struct afs_vnode *vnode)
+static int afs_inode_map_status(struct afs_vnode *vnode, struct key *key)
 {
 	struct inode *inode = AFS_VNODE_TO_I(vnode);
 
@@ -44,7 +44,7 @@
 	case AFS_FTYPE_FILE:
 		inode->i_mode	= S_IFREG | vnode->status.mode;
 		inode->i_op	= &afs_file_inode_operations;
-		inode->i_fop	= &generic_ro_fops;
+		inode->i_fop	= &afs_file_operations;
 		break;
 	case AFS_FTYPE_DIR:
 		inode->i_mode	= S_IFDIR | vnode->status.mode;
@@ -73,7 +73,7 @@
 
 	/* check to see whether a symbolic link is really a mountpoint */
 	if (vnode->status.type == AFS_FTYPE_SYMLINK) {
-		afs_mntpt_check_symlink(vnode);
+		afs_mntpt_check_symlink(vnode, key);
 
 		if (test_bit(AFS_VNODE_MOUNTPOINT, &vnode->flags)) {
 			inode->i_mode	= S_IFDIR | vnode->status.mode;
@@ -115,7 +115,8 @@
 /*
  * inode retrieval
  */
-inline struct inode *afs_iget(struct super_block *sb, struct afs_fid *fid)
+inline struct inode *afs_iget(struct super_block *sb, struct key *key,
+			      struct afs_fid *fid)
 {
 	struct afs_iget_data data = { .fid = *fid };
 	struct afs_super_info *as;
@@ -157,10 +158,10 @@
 
 	/* okay... it's a new inode */
 	set_bit(AFS_VNODE_CB_BROKEN, &vnode->flags);
-	ret = afs_vnode_fetch_status(vnode);
+	ret = afs_vnode_fetch_status(vnode, NULL, key);
 	if (ret < 0)
 		goto bad_inode;
-	ret = afs_inode_map_status(vnode);
+	ret = afs_inode_map_status(vnode, key);
 	if (ret < 0)
 		goto bad_inode;
 
@@ -201,6 +202,7 @@
  */
 void afs_clear_inode(struct inode *inode)
 {
+	struct afs_permits *permits;
 	struct afs_vnode *vnode;
 
 	vnode = AFS_FS_I(inode);
@@ -233,5 +235,12 @@
 	vnode->cache = NULL;
 #endif
 
+	mutex_lock(&vnode->permits_lock);
+	permits = vnode->permits;
+	rcu_assign_pointer(vnode->permits, NULL);
+	mutex_unlock(&vnode->permits_lock);
+	if (permits)
+		call_rcu(&permits->rcu, afs_zap_permits);
+
 	_leave("");
 }
diff --git a/fs/afs/internal.h b/fs/afs/internal.h
index afc6f0f..8bed242 100644
--- a/fs/afs/internal.h
+++ b/fs/afs/internal.h
@@ -15,6 +15,7 @@
 #include <linux/pagemap.h>
 #include <linux/skbuff.h>
 #include <linux/rxrpc.h>
+#include <linux/key.h>
 #include "afs.h"
 #include "afs_vl.h"
 
@@ -32,6 +33,17 @@
 	AFS_VL_UNCERTAIN,		/* uncertain state (update failed) */
 } __attribute__((packed)) afs_vlocation_state_t;
 
+struct afs_mount_params {
+	bool			rwpath;		/* T if the parent should be considered R/W */
+	bool			force;		/* T to force cell type */
+	afs_voltype_t		type;		/* type of volume requested */
+	int			volnamesz;	/* size of volume name */
+	const char		*volname;	/* name of volume to mount */
+	struct afs_cell		*cell;		/* cell in which to find volume */
+	struct afs_volume	*volume;	/* volume record */
+	struct key		*key;		/* key to use for secure mounting */
+};
+
 /*
  * definition of how to wait for the completion of an operation
  */
@@ -95,6 +107,8 @@
 };
 
 struct afs_call_type {
+	const char *name;
+
 	/* deliver request or reply data to an call
 	 * - returning an error will cause the call to be aborted
 	 */
@@ -128,8 +142,8 @@
  * entry in the cached cell catalogue
  */
 struct afs_cache_cell {
-	char			name[64];	/* cell name (padded with NULs) */
-	struct in_addr		vl_servers[15];	/* cached cell VL servers */
+	char		name[AFS_MAXCELLNAME];	/* cell name (padded with NULs) */
+	struct in_addr	vl_servers[15];		/* cached cell VL servers */
 };
 
 /*
@@ -138,6 +152,7 @@
 struct afs_cell {
 	atomic_t		usage;
 	struct list_head	link;		/* main cell list link */
+	struct key		*anonymous_key;	/* anonymous user key for this cell */
 	struct list_head	proc_link;	/* /proc cell list link */
 	struct proc_dir_entry	*proc_dir;	/* /proc dir for this cell */
 #ifdef AFS_CACHING_SUPPORT
@@ -163,7 +178,9 @@
  * entry in the cached volume location catalogue
  */
 struct afs_cache_vlocation {
-	uint8_t			name[64 + 1];	/* volume name (lowercase, padded with NULs) */
+	/* volume name (lowercase, padded with NULs) */
+	uint8_t			name[AFS_MAXVOLNAME + 1];
+
 	uint8_t			nservers;	/* number of entries used in servers[] */
 	uint8_t			vidmask;	/* voltype mask for vid[] */
 	uint8_t			srvtmask[8];	/* voltype masks for servers[] */
@@ -281,7 +298,8 @@
 #ifdef AFS_CACHING_SUPPORT
 	struct cachefs_cookie	*cache;		/* caching cookie */
 #endif
-
+	struct afs_permits	*permits;	/* cache of permits so far obtained */
+	struct mutex		permits_lock;	/* lock for altering permits list */
 	wait_queue_head_t	update_waitq;	/* status fetch waitqueue */
 	unsigned		update_cnt;	/* number of outstanding ops that will update the
 						 * status */
@@ -296,12 +314,13 @@
 #define AFS_VNODE_DIR_CHANGED	6		/* set if vnode's parent dir metadata changed */
 #define AFS_VNODE_DIR_MODIFIED	7		/* set if vnode's parent dir data modified */
 
+	long			acl_order;	/* ACL check count (callback break count) */
+
 	/* outstanding callback notification on this file */
 	struct rb_node		server_rb;	/* link in server->fs_vnodes */
 	struct rb_node		cb_promise;	/* link in server->cb_promises */
 	struct work_struct	cb_broken_work;	/* work to be done on callback break */
 	struct mutex		cb_broken_lock;	/* lock against multiple attempts to fix break */
-//	struct list_head	cb_hash_link;	/* link in master callback hash */
 	time_t			cb_expires;	/* time at which callback expires */
 	time_t			cb_expires_at;	/* time used to order cb_promise */
 	unsigned		cb_version;	/* callback version */
@@ -310,6 +329,23 @@
 	bool			cb_promised;	/* true if promise still holds */
 };
 
+/*
+ * cached security record for one user's attempt to access a vnode
+ */
+struct afs_permit {
+	struct key		*key;		/* RxRPC ticket holding a security context */
+	afs_access_t		access_mask;	/* access mask for this key */
+};
+
+/*
+ * cache of security records from attempts to access a vnode
+ */
+struct afs_permits {
+	struct rcu_head		rcu;		/* disposal procedure */
+	int			count;		/* number of records */
+	struct afs_permit	permits[0];	/* the permits so far examined */
+};
+
 /*****************************************************************************/
 /*
  * callback.c
@@ -352,11 +388,17 @@
 extern const struct inode_operations afs_dir_inode_operations;
 extern const struct file_operations afs_dir_file_operations;
 
+extern int afs_permission(struct inode *, int, struct nameidata *);
+
 /*
  * file.c
  */
 extern const struct address_space_operations afs_fs_aops;
 extern const struct inode_operations afs_file_inode_operations;
+extern const struct file_operations afs_file_operations;
+
+extern int afs_open(struct inode *, struct file *);
+extern int afs_release(struct inode *, struct file *);
 
 #ifdef AFS_CACHING_SUPPORT
 extern int afs_cache_get_page_cookie(struct page *, struct cachefs_page **);
@@ -365,22 +407,24 @@
 /*
  * fsclient.c
  */
-extern int afs_fs_fetch_file_status(struct afs_server *,
-				    struct afs_vnode *,
-				    struct afs_volsync *,
+extern int afs_fs_fetch_file_status(struct afs_server *, struct key *,
+				    struct afs_vnode *, struct afs_volsync *,
 				    const struct afs_wait_mode *);
 extern int afs_fs_give_up_callbacks(struct afs_server *,
 				    const struct afs_wait_mode *);
-extern int afs_fs_fetch_data(struct afs_server *, struct afs_vnode *, off_t,
-			     size_t, struct page *, struct afs_volsync *,
+extern int afs_fs_fetch_data(struct afs_server *, struct key *,
+			     struct afs_vnode *, off_t, size_t, struct page *,
+			     struct afs_volsync *,
 			     const struct afs_wait_mode *);
 
 /*
  * inode.c
  */
-extern struct inode *afs_iget(struct super_block *, struct afs_fid *);
+extern struct inode *afs_iget(struct super_block *, struct key *,
+			      struct afs_fid *);
 extern int afs_inode_getattr(struct vfsmount *, struct dentry *,
 			     struct kstat *);
+extern void afs_zap_permits(struct rcu_head *);
 extern void afs_clear_inode(struct inode *);
 
 /*
@@ -402,17 +446,11 @@
 extern const struct file_operations afs_mntpt_file_operations;
 extern unsigned long afs_mntpt_expiry_timeout;
 
-extern int afs_mntpt_check_symlink(struct afs_vnode *);
+extern int afs_mntpt_check_symlink(struct afs_vnode *, struct key *);
 extern void afs_mntpt_kill_timer(void);
 extern void afs_umount_begin(struct vfsmount *, int);
 
 /*
- * super.c
- */
-extern int afs_fs_init(void);
-extern void afs_fs_exit(void);
-
-/*
  * proc.c
  */
 extern int afs_proc_init(void);
@@ -436,6 +474,14 @@
 			    size_t);
 
 /*
+ * security.c
+ */
+extern void afs_clear_permits(struct afs_vnode *);
+extern void afs_cache_permit(struct afs_vnode *, struct key *, long);
+extern struct key *afs_request_key(struct afs_cell *);
+extern int afs_permission(struct inode *, int, struct nameidata *);
+
+/*
  * server.c
  */
 extern spinlock_t afs_server_peer_lock;
@@ -449,16 +495,23 @@
 extern void __exit afs_purge_servers(void);
 
 /*
+ * super.c
+ */
+extern int afs_fs_init(void);
+extern void afs_fs_exit(void);
+
+/*
  * vlclient.c
  */
 #ifdef AFS_CACHING_SUPPORT
 extern struct cachefs_index_def afs_vlocation_cache_index_def;
 #endif
 
-extern int afs_vl_get_entry_by_name(struct in_addr *, const char *,
-				    struct afs_cache_vlocation *,
+extern int afs_vl_get_entry_by_name(struct in_addr *, struct key *,
+				    const char *, struct afs_cache_vlocation *,
 				    const struct afs_wait_mode *);
-extern int afs_vl_get_entry_by_id(struct in_addr *, afs_volid_t, afs_voltype_t,
+extern int afs_vl_get_entry_by_id(struct in_addr *, struct key *,
+				  afs_volid_t, afs_voltype_t,
 				  struct afs_cache_vlocation *,
 				  const struct afs_wait_mode *);
 
@@ -469,6 +522,7 @@
 
 extern int __init afs_vlocation_update_init(void);
 extern struct afs_vlocation *afs_vlocation_lookup(struct afs_cell *,
+						  struct key *,
 						  const char *, size_t);
 extern void afs_put_vlocation(struct afs_vlocation *);
 extern void __exit afs_vlocation_purge(void);
@@ -492,9 +546,10 @@
 	return &vnode->vfs_inode;
 }
 
-extern int afs_vnode_fetch_status(struct afs_vnode *);
-extern int afs_vnode_fetch_data(struct afs_vnode *vnode, off_t, size_t,
-				struct page *);
+extern int afs_vnode_fetch_status(struct afs_vnode *, struct afs_vnode *,
+				  struct key *);
+extern int afs_vnode_fetch_data(struct afs_vnode *, struct key *,
+				off_t, size_t, struct page *);
 
 /*
  * volume.c
@@ -506,8 +561,7 @@
 #define afs_get_volume(V) do { atomic_inc(&(V)->usage); } while(0)
 
 extern void afs_put_volume(struct afs_volume *);
-extern struct afs_volume *afs_volume_lookup(const char *, struct afs_cell *,
-					    int);
+extern struct afs_volume *afs_volume_lookup(struct afs_mount_params *);
 extern struct afs_server *afs_volume_pick_fileserver(struct afs_vnode *);
 extern int afs_volume_release_fileserver(struct afs_vnode *,
 					 struct afs_server *, int);
diff --git a/fs/afs/mntpt.c b/fs/afs/mntpt.c
index 08c11a0..b905ae3 100644
--- a/fs/afs/mntpt.c
+++ b/fs/afs/mntpt.c
@@ -48,8 +48,11 @@
  * check a symbolic link to see whether it actually encodes a mountpoint
  * - sets the AFS_VNODE_MOUNTPOINT flag on the vnode appropriately
  */
-int afs_mntpt_check_symlink(struct afs_vnode *vnode)
+int afs_mntpt_check_symlink(struct afs_vnode *vnode, struct key *key)
 {
+	struct file file = {
+		.private_data = key,
+	};
 	struct page *page;
 	size_t size;
 	char *buf;
@@ -58,7 +61,7 @@
 	_enter("{%u,%u}", vnode->fid.vnode, vnode->fid.unique);
 
 	/* read the contents of the symlink into the pagecache */
-	page = read_mapping_page(AFS_VNODE_TO_I(vnode)->i_mapping, 0, NULL);
+	page = read_mapping_page(AFS_VNODE_TO_I(vnode)->i_mapping, 0, &file);
 	if (IS_ERR(page)) {
 		ret = PTR_ERR(page);
 		goto out;
@@ -214,7 +217,7 @@
 	struct vfsmount *newmnt;
 	int err;
 
-	_enter("%p{%s},{%s:%p{%s}}",
+	_enter("%p{%s},{%s:%p{%s},}",
 	       dentry,
 	       dentry->d_name.name,
 	       nd->mnt->mnt_devname,
@@ -234,7 +237,8 @@
 	err = do_add_mount(newmnt, nd, MNT_SHRINKABLE, &afs_vfsmounts);
 	switch (err) {
 	case 0:
-		path_release(nd);
+		mntput(nd->mnt);
+		dput(nd->dentry);
 		nd->mnt = newmnt;
 		nd->dentry = dget(newmnt->mnt_root);
 		schedule_delayed_work(&afs_mntpt_expiry_timer,
diff --git a/fs/afs/rxrpc.c b/fs/afs/rxrpc.c
index b927742..e86c527 100644
--- a/fs/afs/rxrpc.c
+++ b/fs/afs/rxrpc.c
@@ -17,6 +17,8 @@
 
 static struct socket *afs_socket; /* my RxRPC socket */
 static struct workqueue_struct *afs_async_calls;
+static atomic_t afs_outstanding_calls;
+static atomic_t afs_outstanding_skbs;
 
 static void afs_wake_up_call_waiter(struct afs_call *);
 static int afs_wait_for_call_to_complete(struct afs_call *);
@@ -45,6 +47,7 @@
 
 /* asynchronous incoming call initial processing */
 static const struct afs_call_type afs_RXCMxxxx = {
+	.name		= "CB.xxxx",
 	.deliver	= afs_deliver_cm_op_id,
 	.abort_to_error	= afs_abort_to_error,
 };
@@ -118,10 +121,67 @@
 
 	_debug("dework");
 	destroy_workqueue(afs_async_calls);
+
+	ASSERTCMP(atomic_read(&afs_outstanding_skbs), ==, 0);
+	ASSERTCMP(atomic_read(&afs_outstanding_calls), ==, 0);
 	_leave("");
 }
 
 /*
+ * note that the data in a socket buffer is now delivered and that the buffer
+ * should be freed
+ */
+static void afs_data_delivered(struct sk_buff *skb)
+{
+	if (!skb) {
+		_debug("DLVR NULL [%d]", atomic_read(&afs_outstanding_skbs));
+		dump_stack();
+	} else {
+		_debug("DLVR %p{%u} [%d]",
+		       skb, skb->mark, atomic_read(&afs_outstanding_skbs));
+		if (atomic_dec_return(&afs_outstanding_skbs) == -1)
+			BUG();
+		rxrpc_kernel_data_delivered(skb);
+	}
+}
+
+/*
+ * free a socket buffer
+ */
+static void afs_free_skb(struct sk_buff *skb)
+{
+	if (!skb) {
+		_debug("FREE NULL [%d]", atomic_read(&afs_outstanding_skbs));
+		dump_stack();
+	} else {
+		_debug("FREE %p{%u} [%d]",
+		       skb, skb->mark, atomic_read(&afs_outstanding_skbs));
+		if (atomic_dec_return(&afs_outstanding_skbs) == -1)
+			BUG();
+		rxrpc_kernel_free_skb(skb);
+	}
+}
+
+/*
+ * free a call
+ */
+static void afs_free_call(struct afs_call *call)
+{
+	_debug("DONE %p{%s} [%d]",
+	       call, call->type->name, atomic_read(&afs_outstanding_calls));
+	if (atomic_dec_return(&afs_outstanding_calls) == -1)
+		BUG();
+
+	ASSERTCMP(call->rxcall, ==, NULL);
+	ASSERT(!work_pending(&call->async_work));
+	ASSERT(skb_queue_empty(&call->rx_queue));
+	ASSERT(call->type->name != NULL);
+
+	kfree(call->request);
+	kfree(call);
+}
+
+/*
  * allocate a call with flat request and reply buffers
  */
 struct afs_call *afs_alloc_flat_call(const struct afs_call_type *type,
@@ -133,30 +193,32 @@
 	if (!call)
 		goto nomem_call;
 
-	if (request_size) {
-		call->request = kmalloc(request_size, GFP_NOFS);
-		if (!call->request)
-			goto nomem_request;
-	}
-
-	if (reply_size) {
-		call->buffer = kmalloc(reply_size, GFP_NOFS);
-		if (!call->buffer)
-			goto nomem_buffer;
-	}
+	_debug("CALL %p{%s} [%d]",
+	       call, type->name, atomic_read(&afs_outstanding_calls));
+	atomic_inc(&afs_outstanding_calls);
 
 	call->type = type;
 	call->request_size = request_size;
 	call->reply_max = reply_size;
 
+	if (request_size) {
+		call->request = kmalloc(request_size, GFP_NOFS);
+		if (!call->request)
+			goto nomem_free;
+	}
+
+	if (reply_size) {
+		call->buffer = kmalloc(reply_size, GFP_NOFS);
+		if (!call->buffer)
+			goto nomem_free;
+	}
+
 	init_waitqueue_head(&call->waitq);
 	skb_queue_head_init(&call->rx_queue);
 	return call;
 
-nomem_buffer:
-	kfree(call->request);
-nomem_request:
-	kfree(call);
+nomem_free:
+	afs_free_call(call);
 nomem_call:
 	return NULL;
 }
@@ -188,6 +250,12 @@
 
 	_enter("%x,{%d},", addr->s_addr, ntohs(call->port));
 
+	ASSERT(call->type != NULL);
+	ASSERT(call->type->name != NULL);
+
+	_debug("MAKE %p{%s} [%d]",
+	       call, call->type->name, atomic_read(&afs_outstanding_calls));
+
 	call->wait_mode = wait_mode;
 	INIT_WORK(&call->async_work, afs_process_async_call);
 
@@ -203,6 +271,7 @@
 	/* create a call */
 	rxcall = rxrpc_kernel_begin_call(afs_socket, &srx, call->key,
 					 (unsigned long) call, gfp);
+	call->key = NULL;
 	if (IS_ERR(rxcall)) {
 		ret = PTR_ERR(rxcall);
 		goto error_kill_call;
@@ -237,10 +306,10 @@
 error_do_abort:
 	rxrpc_kernel_abort_call(rxcall, RX_USER_ABORT);
 	rxrpc_kernel_end_call(rxcall);
+	call->rxcall = NULL;
 error_kill_call:
 	call->type->destructor(call);
-	ASSERT(skb_queue_empty(&call->rx_queue));
-	kfree(call);
+	afs_free_call(call);
 	_leave(" = %d", ret);
 	return ret;
 }
@@ -257,15 +326,19 @@
 
 	_enter("%p,,%u", call, skb->mark);
 
+	_debug("ICPT %p{%u} [%d]",
+	       skb, skb->mark, atomic_read(&afs_outstanding_skbs));
+
 	ASSERTCMP(sk, ==, afs_socket->sk);
+	atomic_inc(&afs_outstanding_skbs);
 
 	if (!call) {
 		/* its an incoming call for our callback service */
-		__skb_queue_tail(&afs_incoming_calls, skb);
+		skb_queue_tail(&afs_incoming_calls, skb);
 		schedule_work(&afs_collect_incoming_call_work);
 	} else {
 		/* route the messages directly to the appropriate call */
-		__skb_queue_tail(&call->rx_queue, skb);
+		skb_queue_tail(&call->rx_queue, skb);
 		call->wait_mode->rx_wakeup(call);
 	}
 
@@ -317,9 +390,9 @@
 				call->state = AFS_CALL_ERROR;
 				break;
 			}
-			rxrpc_kernel_data_delivered(skb);
+			afs_data_delivered(skb);
 			skb = NULL;
-			break;
+			continue;
 		case RXRPC_SKB_MARK_FINAL_ACK:
 			_debug("Rcv ACK");
 			call->state = AFS_CALL_COMPLETE;
@@ -350,19 +423,19 @@
 			break;
 		}
 
-		rxrpc_kernel_free_skb(skb);
+		afs_free_skb(skb);
 	}
 
 	/* make sure the queue is empty if the call is done with (we might have
 	 * aborted the call early because of an unmarshalling error) */
 	if (call->state >= AFS_CALL_COMPLETE) {
 		while ((skb = skb_dequeue(&call->rx_queue)))
-			rxrpc_kernel_free_skb(skb);
+			afs_free_skb(skb);
 		if (call->incoming) {
 			rxrpc_kernel_end_call(call->rxcall);
+			call->rxcall = NULL;
 			call->type->destructor(call);
-			ASSERT(skb_queue_empty(&call->rx_queue));
-			kfree(call);
+			afs_free_call(call);
 		}
 	}
 
@@ -409,14 +482,14 @@
 		_debug("call incomplete");
 		rxrpc_kernel_abort_call(call->rxcall, RX_CALL_DEAD);
 		while ((skb = skb_dequeue(&call->rx_queue)))
-			rxrpc_kernel_free_skb(skb);
+			afs_free_skb(skb);
 	}
 
 	_debug("call complete");
 	rxrpc_kernel_end_call(call->rxcall);
+	call->rxcall = NULL;
 	call->type->destructor(call);
-	ASSERT(skb_queue_empty(&call->rx_queue));
-	kfree(call);
+	afs_free_call(call);
 	_leave(" = %d", ret);
 	return ret;
 }
@@ -459,9 +532,7 @@
 
 	_enter("");
 
-	ASSERT(skb_queue_empty(&call->rx_queue));
-	ASSERT(!work_pending(&call->async_work));
-	kfree(call);
+	afs_free_call(call);
 
 	_leave("");
 }
@@ -489,6 +560,7 @@
 
 		/* kill the call */
 		rxrpc_kernel_end_call(call->rxcall);
+		call->rxcall = NULL;
 		if (call->type->destructor)
 			call->type->destructor(call);
 
@@ -526,7 +598,7 @@
 		_debug("new call");
 
 		/* don't need the notification */
-		rxrpc_kernel_free_skb(skb);
+		afs_free_skb(skb);
 
 		if (!call) {
 			call = kzalloc(sizeof(struct afs_call), GFP_KERNEL);
@@ -541,6 +613,11 @@
 			init_waitqueue_head(&call->waitq);
 			skb_queue_head_init(&call->rx_queue);
 			call->state = AFS_CALL_AWAIT_OP_ID;
+
+			_debug("CALL %p{%s} [%d]",
+			       call, call->type->name,
+			       atomic_read(&afs_outstanding_calls));
+			atomic_inc(&afs_outstanding_calls);
 		}
 
 		rxcall = rxrpc_kernel_accept_call(afs_socket,
@@ -551,7 +628,8 @@
 		}
 	}
 
-	kfree(call);
+	if (call)
+		afs_free_call(call);
 }
 
 /*
@@ -629,8 +707,7 @@
 		rxrpc_kernel_end_call(call->rxcall);
 		call->rxcall = NULL;
 		call->type->destructor(call);
-		ASSERT(skb_queue_empty(&call->rx_queue));
-		kfree(call);
+		afs_free_call(call);
 		_leave(" [error]");
 		return;
 	}
diff --git a/fs/afs/security.c b/fs/afs/security.c
new file mode 100644
index 0000000..cbdd7f7
--- /dev/null
+++ b/fs/afs/security.c
@@ -0,0 +1,345 @@
+/* AFS security handling
+ *
+ * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/fs.h>
+#include <linux/ctype.h>
+#include <keys/rxrpc-type.h>
+#include "internal.h"
+
+/*
+ * get a key
+ */
+struct key *afs_request_key(struct afs_cell *cell)
+{
+	struct key *key;
+
+	_enter("{%x}", key_serial(cell->anonymous_key));
+
+	_debug("key %s", cell->anonymous_key->description);
+	key = request_key(&key_type_rxrpc, cell->anonymous_key->description,
+			  NULL);
+	if (IS_ERR(key)) {
+		if (PTR_ERR(key) != -ENOKEY) {
+			_leave(" = %ld", PTR_ERR(key));
+			return key;
+		}
+
+		/* act as anonymous user */
+		_leave(" = {%x} [anon]", key_serial(cell->anonymous_key));
+		return key_get(cell->anonymous_key);
+	} else {
+		/* act as authorised user */
+		_leave(" = {%x} [auth]", key_serial(key));
+		return key;
+	}
+}
+
+/*
+ * dispose of a permits list
+ */
+void afs_zap_permits(struct rcu_head *rcu)
+{
+	struct afs_permits *permits =
+		container_of(rcu, struct afs_permits, rcu);
+	int loop;
+
+	_enter("{%d}", permits->count);
+
+	for (loop = permits->count - 1; loop >= 0; loop--)
+		key_put(permits->permits[loop].key);
+	kfree(permits);
+}
+
+/*
+ * dispose of a permits list in which all the key pointers have been copied
+ */
+static void afs_dispose_of_permits(struct rcu_head *rcu)
+{
+	struct afs_permits *permits =
+		container_of(rcu, struct afs_permits, rcu);
+
+	_enter("{%d}", permits->count);
+
+	kfree(permits);
+}
+
+/*
+ * get the authorising vnode - this is the specified inode itself if it's a
+ * directory or it's the parent directory if the specified inode is a file or
+ * symlink
+ * - the caller must release the ref on the inode
+ */
+static struct afs_vnode *afs_get_auth_inode(struct afs_vnode *vnode,
+					    struct key *key)
+{
+	struct afs_vnode *auth_vnode;
+	struct inode *auth_inode;
+
+	_enter("");
+
+	if (S_ISDIR(vnode->vfs_inode.i_mode)) {
+		auth_inode = igrab(&vnode->vfs_inode);
+		ASSERT(auth_inode != NULL);
+	} else {
+		auth_inode = afs_iget(vnode->vfs_inode.i_sb, key,
+				      &vnode->status.parent);
+		if (IS_ERR(auth_inode))
+			return ERR_PTR(PTR_ERR(auth_inode));
+	}
+
+	auth_vnode = AFS_FS_I(auth_inode);
+	_leave(" = {%x}", auth_vnode->fid.vnode);
+	return auth_vnode;
+}
+
+/*
+ * clear the permit cache on a directory vnode
+ */
+void afs_clear_permits(struct afs_vnode *vnode)
+{
+	struct afs_permits *permits;
+
+	_enter("{%x}", vnode->fid.vnode);
+
+	mutex_lock(&vnode->permits_lock);
+	permits = vnode->permits;
+	rcu_assign_pointer(vnode->permits, NULL);
+	mutex_unlock(&vnode->permits_lock);
+
+	if (permits)
+		call_rcu(&permits->rcu, afs_zap_permits);
+	_leave("");
+}
+
+/*
+ * add the result obtained for a vnode to its or its parent directory's cache
+ * for the key used to access it
+ */
+void afs_cache_permit(struct afs_vnode *vnode, struct key *key, long acl_order)
+{
+	struct afs_permits *permits, *xpermits;
+	struct afs_permit *permit;
+	struct afs_vnode *auth_vnode;
+	int count, loop;
+
+	_enter("{%x},%x,%lx", vnode->fid.vnode, key_serial(key), acl_order);
+
+	auth_vnode = afs_get_auth_inode(vnode, key);
+	if (IS_ERR(auth_vnode)) {
+		_leave(" [get error %ld]", PTR_ERR(auth_vnode));
+		return;
+	}
+
+	mutex_lock(&auth_vnode->permits_lock);
+
+	/* guard against a rename being detected whilst we waited for the
+	 * lock */
+	if (memcmp(&auth_vnode->fid, &vnode->status.parent,
+		   sizeof(struct afs_fid)) != 0) {
+		_debug("renamed");
+		goto out_unlock;
+	}
+
+	/* have to be careful as the directory's callback may be broken between
+	 * us receiving the status we're trying to cache and us getting the
+	 * lock to update the cache for the status */
+	if (auth_vnode->acl_order - acl_order > 0) {
+		_debug("ACL changed?");
+		goto out_unlock;
+	}
+
+	/* always update the anonymous mask */
+	_debug("anon access %x", vnode->status.anon_access);
+	auth_vnode->status.anon_access = vnode->status.anon_access;
+	if (key == vnode->volume->cell->anonymous_key)
+		goto out_unlock;
+
+	xpermits = auth_vnode->permits;
+	count = 0;
+	if (xpermits) {
+		/* see if the permit is already in the list
+		 * - if it is then we just amend the list
+		 */
+		count = xpermits->count;
+		permit = xpermits->permits;
+		for (loop = count; loop > 0; loop--) {
+			if (permit->key == key) {
+				permit->access_mask =
+					vnode->status.caller_access;
+				goto out_unlock;
+			}
+			permit++;
+		}
+	}
+
+	permits = kmalloc(sizeof(*permits) + sizeof(*permit) * (count + 1),
+			  GFP_NOFS);
+	if (!permits)
+		goto out_unlock;
+
+	memcpy(permits->permits, xpermits->permits,
+	       count * sizeof(struct afs_permit));
+
+	_debug("key %x access %x",
+	       key_serial(key), vnode->status.caller_access);
+	permits->permits[count].access_mask = vnode->status.caller_access;
+	permits->permits[count].key = key_get(key);
+	permits->count = count + 1;
+
+	rcu_assign_pointer(auth_vnode->permits, permits);
+	if (xpermits)
+		call_rcu(&xpermits->rcu, afs_dispose_of_permits);
+
+out_unlock:
+	mutex_unlock(&auth_vnode->permits_lock);
+	iput(&auth_vnode->vfs_inode);
+	_leave("");
+}
+
+/*
+ * check with the fileserver to see if the directory or parent directory is
+ * permitted to be accessed with this authorisation, and if so, what access it
+ * is granted
+ */
+static int afs_check_permit(struct afs_vnode *vnode, struct key *key,
+			    afs_access_t *_access)
+{
+	struct afs_permits *permits;
+	struct afs_permit *permit;
+	struct afs_vnode *auth_vnode;
+	bool valid;
+	int loop, ret;
+
+	_enter("");
+
+	auth_vnode = afs_get_auth_inode(vnode, key);
+	if (IS_ERR(auth_vnode)) {
+		*_access = 0;
+		_leave(" = %ld", PTR_ERR(auth_vnode));
+		return PTR_ERR(auth_vnode);
+	}
+
+	ASSERT(S_ISDIR(auth_vnode->vfs_inode.i_mode));
+
+	/* check the permits to see if we've got one yet */
+	if (key == auth_vnode->volume->cell->anonymous_key) {
+		_debug("anon");
+		*_access = auth_vnode->status.anon_access;
+		valid = true;
+	} else {
+		valid = false;
+		rcu_read_lock();
+		permits = rcu_dereference(auth_vnode->permits);
+		if (permits) {
+			permit = permits->permits;
+			for (loop = permits->count; loop > 0; loop--) {
+				if (permit->key == key) {
+					_debug("found in cache");
+					*_access = permit->access_mask;
+					valid = true;
+					break;
+				}
+				permit++;
+			}
+		}
+		rcu_read_unlock();
+	}
+
+	if (!valid) {
+		/* check the status on the file we're actually interested in
+		 * (the post-processing will cache the result on auth_vnode) */
+		_debug("no valid permit");
+
+		set_bit(AFS_VNODE_CB_BROKEN, &vnode->flags);
+		ret = afs_vnode_fetch_status(vnode, auth_vnode, key);
+		if (ret < 0) {
+			iput(&auth_vnode->vfs_inode);
+			*_access = 0;
+			_leave(" = %d", ret);
+			return ret;
+		}
+	}
+
+	*_access = vnode->status.caller_access;
+	iput(&auth_vnode->vfs_inode);
+	_leave(" = 0 [access %x]", *_access);
+	return 0;
+}
+
+/*
+ * check the permissions on an AFS file
+ * - AFS ACLs are attached to directories only, and a file is controlled by its
+ *   parent directory's ACL
+ */
+int afs_permission(struct inode *inode, int mask, struct nameidata *nd)
+{
+	struct afs_vnode *vnode = AFS_FS_I(inode);
+	afs_access_t access;
+	struct key *key;
+	int ret;
+
+	_enter("{%x:%x},%x,", vnode->fid.vid, vnode->fid.vnode, mask);
+
+	key = afs_request_key(vnode->volume->cell);
+	if (IS_ERR(key)) {
+		_leave(" = %ld [key]", PTR_ERR(key));
+		return PTR_ERR(key);
+	}
+
+	/* check the permits to see if we've got one yet */
+	ret = afs_check_permit(vnode, key, &access);
+	if (ret < 0) {
+		key_put(key);
+		_leave(" = %d [check]", ret);
+		return ret;
+	}
+
+	/* interpret the access mask */
+	_debug("REQ %x ACC %x on %s",
+	       mask, access, S_ISDIR(inode->i_mode) ? "dir" : "file");
+
+	if (S_ISDIR(inode->i_mode)) {
+		if (mask & MAY_EXEC) {
+			if (!(access & AFS_ACE_LOOKUP))
+				goto permission_denied;
+		} else if (mask & MAY_READ) {
+			if (!(access & AFS_ACE_READ))
+				goto permission_denied;
+		} else if (mask & MAY_WRITE) {
+			if (!(access & (AFS_ACE_DELETE | /* rmdir, unlink, rename from */
+					AFS_ACE_INSERT | /* create, mkdir, symlink, rename to */
+					AFS_ACE_WRITE))) /* chmod */
+				goto permission_denied;
+		} else {
+			BUG();
+		}
+	} else {
+		if (!(access & AFS_ACE_LOOKUP))
+			goto permission_denied;
+		if (mask & (MAY_EXEC | MAY_READ)) {
+			if (!(access & AFS_ACE_READ))
+				goto permission_denied;
+		} else if (mask & MAY_WRITE) {
+			if (!(access & AFS_ACE_WRITE))
+				goto permission_denied;
+		}
+	}
+
+	key_put(key);
+	return generic_permission(inode, mask, NULL);
+
+permission_denied:
+	key_put(key);
+	_leave(" = -EACCES");
+	return -EACCES;
+}
diff --git a/fs/afs/super.c b/fs/afs/super.c
index 77e6875..497350a 100644
--- a/fs/afs/super.c
+++ b/fs/afs/super.c
@@ -24,12 +24,6 @@
 
 #define AFS_FS_MAGIC 0x6B414653 /* 'kAFS' */
 
-struct afs_mount_params {
-	int			rwpath;
-	struct afs_cell		*default_cell;
-	struct afs_volume	*volume;
-};
-
 static void afs_i_init_once(void *foo, struct kmem_cache *cachep,
 			    unsigned long flags);
 
@@ -150,8 +144,8 @@
  * - this function has been shamelessly adapted from the ext3 fs which
  *   shamelessly adapted it from the msdos fs
  */
-static int afs_super_parse_options(struct afs_mount_params *params,
-				   char *options, const char **devname)
+static int afs_parse_options(struct afs_mount_params *params,
+			     char *options, const char **devname)
 {
 	struct afs_cell *cell;
 	char *key, *value;
@@ -183,8 +177,8 @@
 			cell = afs_cell_lookup(value, strlen(value));
 			if (IS_ERR(cell))
 				return PTR_ERR(cell);
-			afs_put_cell(params->default_cell);
-			params->default_cell = cell;
+			afs_put_cell(params->cell);
+			params->cell = cell;
 		} else {
 			printk("kAFS: Unknown mount option: '%s'\n",  key);
 			ret = -EINVAL;
@@ -199,6 +193,99 @@
 }
 
 /*
+ * parse a device name to get cell name, volume name, volume type and R/W
+ * selector
+ * - this can be one of the following:
+ *	"%[cell:]volume[.]"		R/W volume
+ *	"#[cell:]volume[.]"		R/O or R/W volume (rwpath=0),
+ *					 or R/W (rwpath=1) volume
+ *	"%[cell:]volume.readonly"	R/O volume
+ *	"#[cell:]volume.readonly"	R/O volume
+ *	"%[cell:]volume.backup"		Backup volume
+ *	"#[cell:]volume.backup"		Backup volume
+ */
+static int afs_parse_device_name(struct afs_mount_params *params,
+				 const char *name)
+{
+	struct afs_cell *cell;
+	const char *cellname, *suffix;
+	int cellnamesz;
+
+	_enter(",%s", name);
+
+	if (!name) {
+		printk(KERN_ERR "kAFS: no volume name specified\n");
+		return -EINVAL;
+	}
+
+	if ((name[0] != '%' && name[0] != '#') || !name[1]) {
+		printk(KERN_ERR "kAFS: unparsable volume name\n");
+		return -EINVAL;
+	}
+
+	/* determine the type of volume we're looking for */
+	params->type = AFSVL_ROVOL;
+	params->force = false;
+	if (params->rwpath || name[0] == '%') {
+		params->type = AFSVL_RWVOL;
+		params->force = true;
+	}
+	name++;
+
+	/* split the cell name out if there is one */
+	params->volname = strchr(name, ':');
+	if (params->volname) {
+		cellname = name;
+		cellnamesz = params->volname - name;
+		params->volname++;
+	} else {
+		params->volname = name;
+		cellname = NULL;
+		cellnamesz = 0;
+	}
+
+	/* the volume type is further affected by a possible suffix */
+	suffix = strrchr(params->volname, '.');
+	if (suffix) {
+		if (strcmp(suffix, ".readonly") == 0) {
+			params->type = AFSVL_ROVOL;
+			params->force = true;
+		} else if (strcmp(suffix, ".backup") == 0) {
+			params->type = AFSVL_BACKVOL;
+			params->force = true;
+		} else if (suffix[1] == 0) {
+		} else {
+			suffix = NULL;
+		}
+	}
+
+	params->volnamesz = suffix ?
+		suffix - params->volname : strlen(params->volname);
+
+	_debug("cell %*.*s [%p]",
+	       cellnamesz, cellnamesz, cellname ?: "", params->cell);
+
+	/* lookup the cell record */
+	if (cellname || !params->cell) {
+		cell = afs_cell_lookup(cellname, cellnamesz);
+		if (IS_ERR(cell)) {
+			printk(KERN_ERR "kAFS: unable to lookup cell '%s'\n",
+			       cellname ?: "");
+			return PTR_ERR(cell);
+		}
+		afs_put_cell(params->cell);
+		params->cell = cell;
+	}
+
+	_debug("CELL:%s [%p] VOLUME:%*.*s SUFFIX:%s TYPE:%d%s",
+	       params->cell->name, params->cell,
+	       params->volnamesz, params->volnamesz, params->volname,
+	       suffix ?: "-", params->type, params->force ? " FORCE" : "");
+
+	return 0;
+}
+
+/*
  * check a superblock to see if it's the one we're looking for
  */
 static int afs_test_super(struct super_block *sb, void *data)
@@ -244,7 +331,7 @@
 	fid.vid		= as->volume->vid;
 	fid.vnode	= 1;
 	fid.unique	= 1;
-	inode = afs_iget(sb, &fid);
+	inode = afs_iget(sb, params->key, &fid);
 	if (IS_ERR(inode))
 		goto error_inode;
 
@@ -285,31 +372,40 @@
 	struct afs_mount_params params;
 	struct super_block *sb;
 	struct afs_volume *vol;
+	struct key *key;
 	int ret;
 
 	_enter(",,%s,%p", dev_name, options);
 
 	memset(&params, 0, sizeof(params));
 
-	/* parse the options */
+	/* parse the options and device name */
 	if (options) {
-		ret = afs_super_parse_options(&params, options, &dev_name);
+		ret = afs_parse_options(&params, options, &dev_name);
 		if (ret < 0)
 			goto error;
-		if (!dev_name) {
-			printk("kAFS: no volume name specified\n");
-			ret = -EINVAL;
-			goto error;
-		}
 	}
 
+
+	ret = afs_parse_device_name(&params, dev_name);
+	if (ret < 0)
+		goto error;
+
+	/* try and do the mount securely */
+	key = afs_request_key(params.cell);
+	if (IS_ERR(key)) {
+		_leave(" = %ld [key]", PTR_ERR(key));
+		ret = PTR_ERR(key);
+		goto error;
+	}
+	params.key = key;
+
 	/* parse the device name */
-	vol = afs_volume_lookup(dev_name, params.default_cell, params.rwpath);
+	vol = afs_volume_lookup(&params);
 	if (IS_ERR(vol)) {
 		ret = PTR_ERR(vol);
 		goto error;
 	}
-
 	params.volume = vol;
 
 	/* allocate a deviceless superblock */
@@ -337,13 +433,14 @@
 
 	simple_set_mnt(mnt, sb);
 	afs_put_volume(params.volume);
-	afs_put_cell(params.default_cell);
+	afs_put_cell(params.cell);
 	_leave(" = 0 [%p]", sb);
 	return 0;
 
 error:
 	afs_put_volume(params.volume);
-	afs_put_cell(params.default_cell);
+	afs_put_cell(params.cell);
+	key_put(params.key);
 	_leave(" = %d", ret);
 	return ret;
 }
@@ -375,6 +472,7 @@
 		memset(vnode, 0, sizeof(*vnode));
 		inode_init_once(&vnode->vfs_inode);
 		init_waitqueue_head(&vnode->update_waitq);
+		mutex_init(&vnode->permits_lock);
 		spin_lock_init(&vnode->lock);
 		INIT_WORK(&vnode->cb_broken_work, afs_broken_callback_work);
 		mutex_init(&vnode->cb_broken_lock);
diff --git a/fs/afs/vlclient.c b/fs/afs/vlclient.c
index 0c7eba1..36c1306 100644
--- a/fs/afs/vlclient.c
+++ b/fs/afs/vlclient.c
@@ -127,6 +127,7 @@
  * VL.GetEntryByName operation type
  */
 static const struct afs_call_type afs_RXVLGetEntryByName = {
+	.name		= "VL.GetEntryByName",
 	.deliver	= afs_deliver_vl_get_entry_by_xxx,
 	.abort_to_error	= afs_vl_abort_to_error,
 	.destructor	= afs_flat_call_destructor,
@@ -136,6 +137,7 @@
  * VL.GetEntryById operation type
  */
 static const struct afs_call_type afs_RXVLGetEntryById = {
+	.name		= "VL.GetEntryById",
 	.deliver	= afs_deliver_vl_get_entry_by_xxx,
 	.abort_to_error	= afs_vl_abort_to_error,
 	.destructor	= afs_flat_call_destructor,
@@ -145,6 +147,7 @@
  * dispatch a get volume entry by name operation
  */
 int afs_vl_get_entry_by_name(struct in_addr *addr,
+			     struct key *key,
 			     const char *volname,
 			     struct afs_cache_vlocation *entry,
 			     const struct afs_wait_mode *wait_mode)
@@ -163,6 +166,7 @@
 	if (!call)
 		return -ENOMEM;
 
+	call->key = key;
 	call->reply = entry;
 	call->service_id = VL_SERVICE;
 	call->port = htons(AFS_VL_PORT);
@@ -183,6 +187,7 @@
  * dispatch a get volume entry by ID operation
  */
 int afs_vl_get_entry_by_id(struct in_addr *addr,
+			   struct key *key,
 			   afs_volid_t volid,
 			   afs_voltype_t voltype,
 			   struct afs_cache_vlocation *entry,
@@ -197,6 +202,7 @@
 	if (!call)
 		return -ENOMEM;
 
+	call->key = key;
 	call->reply = entry;
 	call->service_id = VL_SERVICE;
 	call->port = htons(AFS_VL_PORT);
diff --git a/fs/afs/vlocation.c b/fs/afs/vlocation.c
index 60cb2f4..7d9815e 100644
--- a/fs/afs/vlocation.c
+++ b/fs/afs/vlocation.c
@@ -33,6 +33,7 @@
  * about the volume in question
  */
 static int afs_vlocation_access_vl_by_name(struct afs_vlocation *vl,
+					   struct key *key,
 					   struct afs_cache_vlocation *vldb)
 {
 	struct afs_cell *cell = vl->cell;
@@ -49,7 +50,7 @@
 		_debug("CellServ[%hu]: %08x", cell->vl_curr_svix, addr.s_addr);
 
 		/* attempt to access the VL server */
-		ret = afs_vl_get_entry_by_name(&addr, vl->vldb.name, vldb,
+		ret = afs_vl_get_entry_by_name(&addr, key, vl->vldb.name, vldb,
 					       &afs_sync_call);
 		switch (ret) {
 		case 0:
@@ -86,6 +87,7 @@
  * about the volume in question
  */
 static int afs_vlocation_access_vl_by_id(struct afs_vlocation *vl,
+					 struct key *key,
 					 afs_volid_t volid,
 					 afs_voltype_t voltype,
 					 struct afs_cache_vlocation *vldb)
@@ -104,7 +106,7 @@
 		_debug("CellServ[%hu]: %08x", cell->vl_curr_svix, addr.s_addr);
 
 		/* attempt to access the VL server */
-		ret = afs_vl_get_entry_by_id(&addr, volid, voltype, vldb,
+		ret = afs_vl_get_entry_by_id(&addr, key, volid, voltype, vldb,
 					     &afs_sync_call);
 		switch (ret) {
 		case 0:
@@ -188,6 +190,7 @@
  * update record if we found it in the cache
  */
 static int afs_vlocation_update_record(struct afs_vlocation *vl,
+				       struct key *key,
 				       struct afs_cache_vlocation *vldb)
 {
 	afs_voltype_t voltype;
@@ -228,7 +231,7 @@
 	/* contact the server to make sure the volume is still available
 	 * - TODO: need to handle disconnected operation here
 	 */
-	ret = afs_vlocation_access_vl_by_id(vl, vid, voltype, vldb);
+	ret = afs_vlocation_access_vl_by_id(vl, key, vid, voltype, vldb);
 	switch (ret) {
 		/* net error */
 	default:
@@ -287,7 +290,8 @@
  * fill in a volume location record, consulting the cache and the VL server
  * both
  */
-static int afs_vlocation_fill_in_record(struct afs_vlocation *vl)
+static int afs_vlocation_fill_in_record(struct afs_vlocation *vl,
+					struct key *key)
 {
 	struct afs_cache_vlocation vldb;
 	int ret;
@@ -310,11 +314,11 @@
 		/* try to update a known volume in the cell VL databases by
 		 * ID as the name may have changed */
 		_debug("found in cache");
-		ret = afs_vlocation_update_record(vl, &vldb);
+		ret = afs_vlocation_update_record(vl, key, &vldb);
 	} else {
 		/* try to look up an unknown volume in the cell VL databases by
 		 * name */
-		ret = afs_vlocation_access_vl_by_name(vl, &vldb);
+		ret = afs_vlocation_access_vl_by_name(vl, key, &vldb);
 		if (ret < 0) {
 			printk("kAFS: failed to locate '%s' in cell '%s'\n",
 			       vl->vldb.name, vl->cell->name);
@@ -366,14 +370,16 @@
  * - insert/update in the local cache if did get a VL response
  */
 struct afs_vlocation *afs_vlocation_lookup(struct afs_cell *cell,
+					   struct key *key,
 					   const char *name,
 					   size_t namesz)
 {
 	struct afs_vlocation *vl;
 	int ret;
 
-	_enter("{%s},%*.*s,%zu",
-	       cell->name, (int) namesz, (int) namesz, name, namesz);
+	_enter("{%s},{%x},%*.*s,%zu",
+	       cell->name, key_serial(key),
+	       (int) namesz, (int) namesz, name, namesz);
 
 	if (namesz > sizeof(vl->vldb.name)) {
 		_leave(" = -ENAMETOOLONG");
@@ -405,7 +411,7 @@
 	up_write(&cell->vl_sem);
 
 fill_in_record:
-	ret = afs_vlocation_fill_in_record(vl);
+	ret = afs_vlocation_fill_in_record(vl, key);
 	if (ret < 0)
 		goto error_abandon;
 	vl->state = AFS_VL_VALID;
@@ -656,7 +662,7 @@
 	vl->upd_rej_cnt = 0;
 	vl->upd_busy_cnt = 0;
 
-	ret = afs_vlocation_update_record(vl, &vldb);
+	ret = afs_vlocation_update_record(vl, NULL, &vldb);
 	switch (ret) {
 	case 0:
 		afs_vlocation_apply_update(vl, &vldb);
diff --git a/fs/afs/vnode.c b/fs/afs/vnode.c
index d2ca139..1600976 100644
--- a/fs/afs/vnode.c
+++ b/fs/afs/vnode.c
@@ -238,9 +238,11 @@
  *   - there are any outstanding ops that will fetch the status
  * - TODO implement local caching
  */
-int afs_vnode_fetch_status(struct afs_vnode *vnode)
+int afs_vnode_fetch_status(struct afs_vnode *vnode,
+			   struct afs_vnode *auth_vnode, struct key *key)
 {
 	struct afs_server *server;
+	unsigned long acl_order;
 	int ret;
 
 	DECLARE_WAITQUEUE(myself, current);
@@ -260,6 +262,10 @@
 		return -ENOENT;
 	}
 
+	acl_order = 0;
+	if (auth_vnode)
+		acl_order = auth_vnode->acl_order;
+
 	spin_lock(&vnode->lock);
 
 	if (!test_bit(AFS_VNODE_CB_BROKEN, &vnode->flags) &&
@@ -324,12 +330,14 @@
 		_debug("USING SERVER: %p{%08x}",
 		       server, ntohl(server->addr.s_addr));
 
-		ret = afs_fs_fetch_file_status(server, vnode, NULL,
+		ret = afs_fs_fetch_file_status(server, key, vnode, NULL,
 					       &afs_sync_call);
 
 	} while (!afs_volume_release_fileserver(vnode, server, ret));
 
 	/* adjust the flags */
+	if (ret == 0 && auth_vnode)
+		afs_cache_permit(vnode, key, acl_order);
 	afs_vnode_finalise_status_update(vnode, server, ret);
 
 	_leave(" = %d", ret);
@@ -340,17 +348,18 @@
  * fetch file data from the volume
  * - TODO implement caching and server failover
  */
-int afs_vnode_fetch_data(struct afs_vnode *vnode, off_t offset, size_t length,
-			 struct page *page)
+int afs_vnode_fetch_data(struct afs_vnode *vnode, struct key *key,
+			 off_t offset, size_t length, struct page *page)
 {
 	struct afs_server *server;
 	int ret;
 
-	_enter("%s,{%u,%u,%u}",
+	_enter("%s{%u,%u,%u},%x,,,",
 	       vnode->volume->vlocation->vldb.name,
 	       vnode->fid.vid,
 	       vnode->fid.vnode,
-	       vnode->fid.unique);
+	       vnode->fid.unique,
+	       key_serial(key));
 
 	/* this op will fetch the status */
 	spin_lock(&vnode->lock);
@@ -367,8 +376,8 @@
 
 		_debug("USING SERVER: %08x\n", ntohl(server->addr.s_addr));
 
-		ret = afs_fs_fetch_data(server, vnode, offset, length, page,
-					NULL, &afs_sync_call);
+		ret = afs_fs_fetch_data(server, key, vnode, offset, length,
+					page, NULL, &afs_sync_call);
 
 	} while (!afs_volume_release_fileserver(vnode, server, ret));
 
diff --git a/fs/afs/volume.c b/fs/afs/volume.c
index 45491cf..15e1367 100644
--- a/fs/afs/volume.c
+++ b/fs/afs/volume.c
@@ -41,83 +41,20 @@
  * - Rule 3: If parent volume is R/W, then only mount R/W volume unless
  *           explicitly told otherwise
  */
-struct afs_volume *afs_volume_lookup(const char *name, struct afs_cell *cell,
-				     int rwpath)
+struct afs_volume *afs_volume_lookup(struct afs_mount_params *params)
 {
 	struct afs_vlocation *vlocation = NULL;
 	struct afs_volume *volume = NULL;
 	struct afs_server *server = NULL;
-	afs_voltype_t type;
-	const char *cellname, *volname, *suffix;
 	char srvtmask;
-	int force, ret, loop, cellnamesz, volnamesz;
+	int ret, loop;
 
-	_enter("%s,,%d,", name, rwpath);
-
-	if (!name || (name[0] != '%' && name[0] != '#') || !name[1]) {
-		printk("kAFS: unparsable volume name\n");
-		return ERR_PTR(-EINVAL);
-	}
-
-	/* determine the type of volume we're looking for */
-	force = 0;
-	type = AFSVL_ROVOL;
-
-	if (rwpath || name[0] == '%') {
-		type = AFSVL_RWVOL;
-		force = 1;
-	}
-
-	suffix = strrchr(name, '.');
-	if (suffix) {
-		if (strcmp(suffix, ".readonly") == 0) {
-			type = AFSVL_ROVOL;
-			force = 1;
-		} else if (strcmp(suffix, ".backup") == 0) {
-			type = AFSVL_BACKVOL;
-			force = 1;
-		} else if (suffix[1] == 0) {
-		} else {
-			suffix = NULL;
-		}
-	}
-
-	/* split the cell and volume names */
-	name++;
-	volname = strchr(name, ':');
-	if (volname) {
-		cellname = name;
-		cellnamesz = volname - name;
-		volname++;
-	} else {
-		volname = name;
-		cellname = NULL;
-		cellnamesz = 0;
-	}
-
-	volnamesz = suffix ? suffix - volname : strlen(volname);
-
-	_debug("CELL:%*.*s [%p] VOLUME:%*.*s SUFFIX:%s TYPE:%d%s",
-	       cellnamesz, cellnamesz, cellname ?: "", cell,
-	       volnamesz, volnamesz, volname, suffix ?: "-",
-	       type,
-	       force ? " FORCE" : "");
-
-	/* lookup the cell record */
-	if (cellname || !cell) {
-		cell = afs_cell_lookup(cellname, cellnamesz);
-		if (IS_ERR(cell)) {
-			ret = PTR_ERR(cell);
-			printk("kAFS: unable to lookup cell '%s'\n",
-			       cellname ?: "");
-			goto error;
-		}
-	} else {
-		afs_get_cell(cell);
-	}
+	_enter("{%*.*s,%d}",
+	       params->volnamesz, params->volnamesz, params->volname, params->rwpath);
 
 	/* lookup the volume location record */
-	vlocation = afs_vlocation_lookup(cell, volname, volnamesz);
+	vlocation = afs_vlocation_lookup(params->cell, params->key,
+					 params->volname, params->volnamesz);
 	if (IS_ERR(vlocation)) {
 		ret = PTR_ERR(vlocation);
 		vlocation = NULL;
@@ -126,30 +63,30 @@
 
 	/* make the final decision on the type we want */
 	ret = -ENOMEDIUM;
-	if (force && !(vlocation->vldb.vidmask & (1 << type)))
+	if (params->force && !(vlocation->vldb.vidmask & (1 << params->type)))
 		goto error;
 
 	srvtmask = 0;
 	for (loop = 0; loop < vlocation->vldb.nservers; loop++)
 		srvtmask |= vlocation->vldb.srvtmask[loop];
 
-	if (force) {
-		if (!(srvtmask & (1 << type)))
+	if (params->force) {
+		if (!(srvtmask & (1 << params->type)))
 			goto error;
 	} else if (srvtmask & AFS_VOL_VTM_RO) {
-		type = AFSVL_ROVOL;
+		params->type = AFSVL_ROVOL;
 	} else if (srvtmask & AFS_VOL_VTM_RW) {
-		type = AFSVL_RWVOL;
+		params->type = AFSVL_RWVOL;
 	} else {
 		goto error;
 	}
 
-	down_write(&cell->vl_sem);
+	down_write(&params->cell->vl_sem);
 
 	/* is the volume already active? */
-	if (vlocation->vols[type]) {
+	if (vlocation->vols[params->type]) {
 		/* yes - re-use it */
-		volume = vlocation->vols[type];
+		volume = vlocation->vols[params->type];
 		afs_get_volume(volume);
 		goto success;
 	}
@@ -163,10 +100,10 @@
 		goto error_up;
 
 	atomic_set(&volume->usage, 1);
-	volume->type		= type;
-	volume->type_force	= force;
-	volume->cell		= cell;
-	volume->vid		= vlocation->vldb.vid[type];
+	volume->type		= params->type;
+	volume->type_force	= params->force;
+	volume->cell		= params->cell;
+	volume->vid		= vlocation->vldb.vid[params->type];
 
 	init_rwsem(&volume->server_sem);
 
@@ -196,28 +133,26 @@
 	afs_get_vlocation(vlocation);
 	volume->vlocation = vlocation;
 
-	vlocation->vols[type] = volume;
+	vlocation->vols[volume->type] = volume;
 
 success:
 	_debug("kAFS selected %s volume %08x",
 	       afs_voltypes[volume->type], volume->vid);
-	up_write(&cell->vl_sem);
+	up_write(&params->cell->vl_sem);
 	afs_put_vlocation(vlocation);
-	afs_put_cell(cell);
 	_leave(" = %p", volume);
 	return volume;
 
 	/* clean up */
 error_up:
-	up_write(&cell->vl_sem);
+	up_write(&params->cell->vl_sem);
 error:
 	afs_put_vlocation(vlocation);
-	afs_put_cell(cell);
 	_leave(" = %d", ret);
 	return ERR_PTR(ret);
 
 error_discard:
-	up_write(&cell->vl_sem);
+	up_write(&params->cell->vl_sem);
 
 	for (loop = volume->nservers - 1; loop >= 0; loop--)
 		afs_put_server(volume->servers[loop]);