afs: Lay the groundwork for supporting network namespaces

Lay the groundwork for supporting network namespaces (netns) to the AFS
filesystem by moving various global features to a network-namespace struct
(afs_net) and providing an instance of this as a temporary global variable
that everything uses via accessor functions for the moment.

The following changes have been made:

 (1) Store the netns in the superblock info.  This will be obtained from
     the mounter's nsproxy on a manual mount and inherited from the parent
     superblock on an automount.

 (2) The cell list is made per-netns.  It can be viewed through
     /proc/net/afs/cells and also be modified by writing commands to that
     file.

 (3) The local workstation cell is set per-ns in /proc/net/afs/rootcell.
     This is unset by default.

 (4) The 'rootcell' module parameter, which sets a cell and VL server list
     modifies the init net namespace, thereby allowing an AFS root fs to be
     theoretically used.

 (5) The volume location lists and the file lock manager are made
     per-netns.

 (6) The AF_RXRPC socket and associated I/O bits are made per-ns.

The various workqueues remain global for the moment.

Changes still to be made:

 (1) /proc/fs/afs/ should be moved to /proc/net/afs/ and a symlink emplaced
     from the old name.

 (2) A per-netns subsys needs to be registered for AFS into which it can
     store its per-netns data.

 (3) Rather than the AF_RXRPC socket being opened on module init, it needs
     to be opened on the creation of a superblock in that netns.

 (4) The socket needs to be closed when the last superblock using it is
     destroyed and all outstanding client calls on it have been completed.
     This prevents a reference loop on the namespace.

 (5) It is possible that several namespaces will want to use AFS, in which
     case each one will need its own UDP port.  These can either be set
     through /proc/net/afs/cm_port or the kernel can pick one at random.
     The init_ns gets 7001 by default.

Other issues that need resolving:

 (1) The DNS keyring needs net-namespacing.

 (2) Where do upcalls go (eg. DNS request-key upcall)?

 (3) Need something like open_socket_in_file_ns() syscall so that AFS
     command line tools attempting to operate on an AFS file/volume have
     their RPC calls go to the right place.

Signed-off-by: David Howells <dhowells@redhat.com>

fs/afs/afs.h

@@ -72,6 +72,15 @@ struct afs_callback {
 
 #define AFSCBMAX 50	/* maximum callbacks transferred per bulk op */
 
+struct afs_uuid {
+	__be32		time_low;			/* low part of timestamp */
+	__be16		time_mid;			/* mid part of timestamp */
+	__be16		time_hi_and_version;		/* high part of timestamp and version  */
+	__u8		clock_seq_hi_and_reserved;	/* clock seq hi and variant */
+	__u8		clock_seq_low;			/* clock seq low */
+	__u8		node[6];			/* spatially unique node ID (MAC addr) */
+};
+
 /*
  * AFS volume information
  */

fs/afs/callback.c

@@ -28,9 +28,7 @@ unsigned afs_vnode_update_timeout = 10;
 	CIRC_SPACE((server)->cb_break_head, (server)->cb_break_tail,	\
 		   ARRAY_SIZE((server)->cb_break))
 
-//static void afs_callback_updater(struct work_struct *);
-
-static struct workqueue_struct *afs_callback_update_worker;
+struct workqueue_struct *afs_callback_update_worker;
 
 /*
  * allow the fileserver to request callback state (re-)initialisation
@@ -343,7 +341,7 @@ void afs_dispatch_give_up_callbacks(struct work_struct *work)
 	 *   had callbacks entirely, and the server will call us later to break
 	 *   them
 	 */
-	afs_fs_give_up_callbacks(server, true);
+	afs_fs_give_up_callbacks(server->cell->net, server, true);
 }
 
 /*
@@ -456,21 +454,3 @@ static void afs_callback_updater(struct work_struct *work)
 	afs_put_vnode(vl);
 }
 #endif
-
-/*
- * initialise the callback update process
- */
-int __init afs_callback_update_init(void)
-{
-	afs_callback_update_worker = alloc_ordered_workqueue("kafs_callbackd",
-							     WQ_MEM_RECLAIM);
-	return afs_callback_update_worker ? 0 : -ENOMEM;
-}
-
-/*
- * shut down the callback update process
- */
-void afs_callback_update_kill(void)
-{
-	destroy_workqueue(afs_callback_update_worker);
-}

fs/afs/cell.c

@@ -18,20 +18,12 @@
 #include <keys/rxrpc-type.h>
 #include "internal.h"
 
-DECLARE_RWSEM(afs_proc_cells_sem);
-LIST_HEAD(afs_proc_cells);
-
-static LIST_HEAD(afs_cells);
-static DEFINE_RWLOCK(afs_cells_lock);
-static DECLARE_RWSEM(afs_cells_sem); /* add/remove serialisation */
-static DECLARE_WAIT_QUEUE_HEAD(afs_cells_freeable_wq);
-static struct afs_cell *afs_cell_root;
-
 /*
  * allocate a cell record and fill in its name, VL server address list and
  * allocate an anonymous key
  */
-static struct afs_cell *afs_cell_alloc(const char *name, unsigned namelen,
+static struct afs_cell *afs_cell_alloc(struct afs_net *net,
+				       const char *name, unsigned namelen,
 				       char *vllist)
 {
 	struct afs_cell *cell;
@@ -62,6 +54,7 @@ static struct afs_cell *afs_cell_alloc(const char *name, unsigned namelen,
 
 	atomic_set(&cell->usage, 1);
 	INIT_LIST_HEAD(&cell->link);
+	cell->net = net;
 	rwlock_init(&cell->servers_lock);
 	INIT_LIST_HEAD(&cell->servers);
 	init_rwsem(&cell->vl_sem);
@@ -142,12 +135,14 @@ error:
 
 /*
  * afs_cell_crate() - create a cell record
+ * @net:	The network namespace
  * @name:	is the name of the cell.
  * @namsesz:	is the strlen of the cell name.
  * @vllist:	is a colon separated list of IP addresses in "a.b.c.d" format.
  * @retref:	is T to return the cell reference when the cell exists.
  */
-struct afs_cell *afs_cell_create(const char *name, unsigned namesz,
+struct afs_cell *afs_cell_create(struct afs_net *net,
+				 const char *name, unsigned namesz,
 				 char *vllist, bool retref)
 {
 	struct afs_cell *cell;
@@ -155,23 +150,23 @@ struct afs_cell *afs_cell_create(const char *name, unsigned namesz,
 
 	_enter("%*.*s,%s", namesz, namesz, name ?: "", vllist);
 
-	down_write(&afs_cells_sem);
-	read_lock(&afs_cells_lock);
-	list_for_each_entry(cell, &afs_cells, link) {
+	down_write(&net->cells_sem);
+	read_lock(&net->cells_lock);
+	list_for_each_entry(cell, &net->cells, link) {
 		if (strncasecmp(cell->name, name, namesz) == 0)
 			goto duplicate_name;
 	}
-	read_unlock(&afs_cells_lock);
+	read_unlock(&net->cells_lock);
 
-	cell = afs_cell_alloc(name, namesz, vllist);
+	cell = afs_cell_alloc(net, name, namesz, vllist);
 	if (IS_ERR(cell)) {
 		_leave(" = %ld", PTR_ERR(cell));
-		up_write(&afs_cells_sem);
+		up_write(&net->cells_sem);
 		return cell;
 	}
 
 	/* add a proc directory for this cell */
-	ret = afs_proc_cell_setup(cell);
+	ret = afs_proc_cell_setup(net, cell);
 	if (ret < 0)
 		goto error;
 
@@ -183,20 +178,20 @@ struct afs_cell *afs_cell_create(const char *name, unsigned namesz,
 #endif
 
 	/* add to the cell lists */
-	write_lock(&afs_cells_lock);
-	list_add_tail(&cell->link, &afs_cells);
-	write_unlock(&afs_cells_lock);
+	write_lock(&net->cells_lock);
+	list_add_tail(&cell->link, &net->cells);
+	write_unlock(&net->cells_lock);
 
-	down_write(&afs_proc_cells_sem);
-	list_add_tail(&cell->proc_link, &afs_proc_cells);
-	up_write(&afs_proc_cells_sem);
-	up_write(&afs_cells_sem);
+	down_write(&net->proc_cells_sem);
+	list_add_tail(&cell->proc_link, &net->proc_cells);
+	up_write(&net->proc_cells_sem);
+	up_write(&net->cells_sem);
 
 	_leave(" = %p", cell);
 	return cell;
 
 error:
-	up_write(&afs_cells_sem);
+	up_write(&net->cells_sem);
 	key_put(cell->anonymous_key);
 	kfree(cell);
 	_leave(" = %d", ret);
@@ -206,8 +201,8 @@ duplicate_name:
 	if (retref && !IS_ERR(cell))
 		afs_get_cell(cell);
 
-	read_unlock(&afs_cells_lock);
-	up_write(&afs_cells_sem);
+	read_unlock(&net->cells_lock);
+	up_write(&net->cells_sem);
 
 	if (retref) {
 		_leave(" = %p", cell);
@@ -223,7 +218,7 @@ duplicate_name:
  * - can be called with a module parameter string
  * - can be called from a write to /proc/fs/afs/rootcell
  */
-int afs_cell_init(char *rootcell)
+int afs_cell_init(struct afs_net *net, char *rootcell)
 {
 	struct afs_cell *old_root, *new_root;
 	char *cp;
@@ -245,17 +240,17 @@ int afs_cell_init(char *rootcell)
 		*cp++ = 0;
 
 	/* allocate a cell record for the root cell */
-	new_root = afs_cell_create(rootcell, strlen(rootcell), cp, false);
+	new_root = afs_cell_create(net, rootcell, strlen(rootcell), cp, false);
 	if (IS_ERR(new_root)) {
 		_leave(" = %ld", PTR_ERR(new_root));
 		return PTR_ERR(new_root);
 	}
 
 	/* install the new cell */
-	write_lock(&afs_cells_lock);
-	old_root = afs_cell_root;
-	afs_cell_root = new_root;
-	write_unlock(&afs_cells_lock);
+	write_lock(&net->cells_lock);
+	old_root = net->ws_cell;
+	net->ws_cell = new_root;
+	write_unlock(&net->cells_lock);
 	afs_put_cell(old_root);
 
 	_leave(" = 0");
@@ -265,19 +260,20 @@ int afs_cell_init(char *rootcell)
 /*
  * lookup a cell record
  */
-struct afs_cell *afs_cell_lookup(const char *name, unsigned namesz,
+struct afs_cell *afs_cell_lookup(struct afs_net *net,
+				 const char *name, unsigned namesz,
 				 bool dns_cell)
 {
 	struct afs_cell *cell;
 
 	_enter("\"%*.*s\",", namesz, namesz, name ?: "");
 
-	down_read(&afs_cells_sem);
-	read_lock(&afs_cells_lock);
+	down_read(&net->cells_sem);
+	read_lock(&net->cells_lock);
 
 	if (name) {
 		/* if the cell was named, look for it in the cell record list */
-		list_for_each_entry(cell, &afs_cells, link) {
+		list_for_each_entry(cell, &net->cells, link) {
 			if (strncmp(cell->name, name, namesz) == 0) {
 				afs_get_cell(cell);
 				goto found;
@@ -289,7 +285,7 @@ struct afs_cell *afs_cell_lookup(const char *name, unsigned namesz,
 	found:
 		;
 	} else {
-		cell = afs_cell_root;
+		cell = net->ws_cell;
 		if (!cell) {
 			/* this should not happen unless user tries to mount
 			 * when root cell is not set. Return an impossibly
@@ -304,16 +300,16 @@ struct afs_cell *afs_cell_lookup(const char *name, unsigned namesz,
 
 	}
 
-	read_unlock(&afs_cells_lock);
-	up_read(&afs_cells_sem);
+	read_unlock(&net->cells_lock);
+	up_read(&net->cells_sem);
 	_leave(" = %p", cell);
 	return cell;
 
 create_cell:
-	read_unlock(&afs_cells_lock);
-	up_read(&afs_cells_sem);
+	read_unlock(&net->cells_lock);
+	up_read(&net->cells_sem);
 
-	cell = afs_cell_create(name, namesz, NULL, true);
+	cell = afs_cell_create(net, name, namesz, NULL, true);
 
 	_leave(" = %p", cell);
 	return cell;
@@ -325,14 +321,14 @@ create_cell:
  */
 struct afs_cell *afs_get_cell_maybe(struct afs_cell *cell)
 {
-	write_lock(&afs_cells_lock);
+	write_lock(&net->cells_lock);
 
 	if (cell && !list_empty(&cell->link))
 		afs_get_cell(cell);
 	else
 		cell = NULL;
 
-	write_unlock(&afs_cells_lock);
+	write_unlock(&net->cells_lock);
 	return cell;
 }
 #endif  /*  0  */
@@ -351,10 +347,10 @@ void afs_put_cell(struct afs_cell *cell)
 
 	/* to prevent a race, the decrement and the dequeue must be effectively
 	 * atomic */
-	write_lock(&afs_cells_lock);
+	write_lock(&cell->net->cells_lock);
 
 	if (likely(!atomic_dec_and_test(&cell->usage))) {
-		write_unlock(&afs_cells_lock);
+		write_unlock(&cell->net->cells_lock);
 		_leave("");
 		return;
 	}
@@ -362,19 +358,19 @@ void afs_put_cell(struct afs_cell *cell)
 	ASSERT(list_empty(&cell->servers));
 	ASSERT(list_empty(&cell->vl_list));
 
-	write_unlock(&afs_cells_lock);
+	wake_up(&cell->net->cells_freeable_wq);
 
-	wake_up(&afs_cells_freeable_wq);
+	write_unlock(&cell->net->cells_lock);
 
 	_leave(" [unused]");
 }
 
 /*
  * destroy a cell record
- * - must be called with the afs_cells_sem write-locked
+ * - must be called with the net->cells_sem write-locked
  * - cell->link should have been broken by the caller
  */
-static void afs_cell_destroy(struct afs_cell *cell)
+static void afs_cell_destroy(struct afs_net *net, struct afs_cell *cell)
 {
 	_enter("%p{%d,%s}", cell, atomic_read(&cell->usage), cell->name);
 
@@ -387,14 +383,14 @@ static void afs_cell_destroy(struct afs_cell *cell)
 
 		_debug("wait for cell %s", cell->name);
 		set_current_state(TASK_UNINTERRUPTIBLE);
-		add_wait_queue(&afs_cells_freeable_wq, &myself);
+		add_wait_queue(&net->cells_freeable_wq, &myself);
 
 		while (atomic_read(&cell->usage) > 0) {
 			schedule();
 			set_current_state(TASK_UNINTERRUPTIBLE);
 		}
 
-		remove_wait_queue(&afs_cells_freeable_wq, &myself);
+		remove_wait_queue(&net->cells_freeable_wq, &myself);
 		set_current_state(TASK_RUNNING);
 	}
 
@@ -403,11 +399,11 @@ static void afs_cell_destroy(struct afs_cell *cell)
 	ASSERT(list_empty(&cell->servers));
 	ASSERT(list_empty(&cell->vl_list));
 
-	afs_proc_cell_remove(cell);
+	afs_proc_cell_remove(net, cell);
 
-	down_write(&afs_proc_cells_sem);
+	down_write(&net->proc_cells_sem);
 	list_del_init(&cell->proc_link);
-	up_write(&afs_proc_cells_sem);
+	up_write(&net->proc_cells_sem);
 
 #ifdef CONFIG_AFS_FSCACHE
 	fscache_relinquish_cookie(cell->cache, 0);
@@ -422,39 +418,39 @@ static void afs_cell_destroy(struct afs_cell *cell)
  * purge in-memory cell database on module unload or afs_init() failure
  * - the timeout daemon is stopped before calling this
  */
-void afs_cell_purge(void)
+void afs_cell_purge(struct afs_net *net)
 {
 	struct afs_cell *cell;
 
 	_enter("");
 
-	afs_put_cell(afs_cell_root);
+	afs_put_cell(net->ws_cell);
 
-	down_write(&afs_cells_sem);
+	down_write(&net->cells_sem);
 
-	while (!list_empty(&afs_cells)) {
+	while (!list_empty(&net->cells)) {
 		cell = NULL;
 
 		/* remove the next cell from the front of the list */
-		write_lock(&afs_cells_lock);
+		write_lock(&net->cells_lock);
 
-		if (!list_empty(&afs_cells)) {
-			cell = list_entry(afs_cells.next,
+		if (!list_empty(&net->cells)) {
+			cell = list_entry(net->cells.next,
 					  struct afs_cell, link);
 			list_del_init(&cell->link);
 		}
 
-		write_unlock(&afs_cells_lock);
+		write_unlock(&net->cells_lock);
 
 		if (cell) {
 			_debug("PURGING CELL %s (%d)",
 			       cell->name, atomic_read(&cell->usage));
 
 			/* now the cell should be left with no references */
-			afs_cell_destroy(cell);
+			afs_cell_destroy(net, cell);
 		}
 	}
 
-	up_write(&afs_cells_sem);
+	up_write(&net->cells_sem);
 	_leave("");
 }

fs/afs/cmservice.c

@@ -193,7 +193,7 @@ static int afs_deliver_cb_callback(struct afs_call *call)
 
 	switch (call->unmarshall) {
 	case 0:
-		rxrpc_kernel_get_peer(afs_socket, call->rxcall, &srx);
+		rxrpc_kernel_get_peer(call->net->socket, call->rxcall, &srx);
 		call->offset = 0;
 		call->unmarshall++;
 
@@ -290,7 +290,7 @@ static int afs_deliver_cb_callback(struct afs_call *call)
 
 	/* we'll need the file server record as that tells us which set of
 	 * vnodes to operate upon */
-	server = afs_find_server(&srx);
+	server = afs_find_server(call->net, &srx);
 	if (!server)
 		return -ENOTCONN;
 	call->server = server;
@@ -324,7 +324,7 @@ static int afs_deliver_cb_init_call_back_state(struct afs_call *call)
 
 	_enter("");
 
-	rxrpc_kernel_get_peer(afs_socket, call->rxcall, &srx);
+	rxrpc_kernel_get_peer(call->net->socket, call->rxcall, &srx);
 
 	ret = afs_extract_data(call, NULL, 0, false);
 	if (ret < 0)
@@ -335,7 +335,7 @@ static int afs_deliver_cb_init_call_back_state(struct afs_call *call)
 
 	/* we'll need the file server record as that tells us which set of
 	 * vnodes to operate upon */
-	server = afs_find_server(&srx);
+	server = afs_find_server(call->net, &srx);
 	if (!server)
 		return -ENOTCONN;
 	call->server = server;
@@ -357,7 +357,7 @@ static int afs_deliver_cb_init_call_back_state3(struct afs_call *call)
 
 	_enter("");
 
-	rxrpc_kernel_get_peer(afs_socket, call->rxcall, &srx);
+	rxrpc_kernel_get_peer(call->net->socket, call->rxcall, &srx);
 
 	_enter("{%u}", call->unmarshall);
 
@@ -407,7 +407,7 @@ static int afs_deliver_cb_init_call_back_state3(struct afs_call *call)
 
 	/* we'll need the file server record as that tells us which set of
 	 * vnodes to operate upon */
-	server = afs_find_server(&srx);
+	server = afs_find_server(call->net, &srx);
 	if (!server)
 		return -ENOTCONN;
 	call->server = server;
@@ -461,7 +461,7 @@ static void SRXAFSCB_ProbeUuid(struct work_struct *work)
 
 	_enter("");
 
-	if (memcmp(r, &afs_uuid, sizeof(afs_uuid)) == 0)
+	if (memcmp(r, &call->net->uuid, sizeof(call->net->uuid)) == 0)
 		reply.match = htonl(0);
 	else
 		reply.match = htonl(1);
@@ -568,13 +568,13 @@ static void SRXAFSCB_TellMeAboutYourself(struct work_struct *work)
 	memset(&reply, 0, sizeof(reply));
 	reply.ia.nifs = htonl(nifs);
 
-	reply.ia.uuid[0] = afs_uuid.time_low;
-	reply.ia.uuid[1] = htonl(ntohs(afs_uuid.time_mid));
-	reply.ia.uuid[2] = htonl(ntohs(afs_uuid.time_hi_and_version));
-	reply.ia.uuid[3] = htonl((s8) afs_uuid.clock_seq_hi_and_reserved);
-	reply.ia.uuid[4] = htonl((s8) afs_uuid.clock_seq_low);
+	reply.ia.uuid[0] = call->net->uuid.time_low;
+	reply.ia.uuid[1] = htonl(ntohs(call->net->uuid.time_mid));
+	reply.ia.uuid[2] = htonl(ntohs(call->net->uuid.time_hi_and_version));
+	reply.ia.uuid[3] = htonl((s8) call->net->uuid.clock_seq_hi_and_reserved);
+	reply.ia.uuid[4] = htonl((s8) call->net->uuid.clock_seq_low);
 	for (loop = 0; loop < 6; loop++)
-		reply.ia.uuid[loop + 5] = htonl((s8) afs_uuid.node[loop]);
+		reply.ia.uuid[loop + 5] = htonl((s8) call->net->uuid.node[loop]);
 
 	if (ifs) {
 		for (loop = 0; loop < nifs; loop++) {

fs/afs/flock.c

@@ -14,47 +14,16 @@
 #define AFS_LOCK_GRANTED	0
 #define AFS_LOCK_PENDING	1
 
+struct workqueue_struct *afs_lock_manager;
+
 static void afs_fl_copy_lock(struct file_lock *new, struct file_lock *fl);
 static void afs_fl_release_private(struct file_lock *fl);
 
-static struct workqueue_struct *afs_lock_manager;
-static DEFINE_MUTEX(afs_lock_manager_mutex);
-
 static const struct file_lock_operations afs_lock_ops = {
 	.fl_copy_lock		= afs_fl_copy_lock,
 	.fl_release_private	= afs_fl_release_private,
 };
 
-/*
- * initialise the lock manager thread if it isn't already running
- */
-static int afs_init_lock_manager(void)
-{
-	int ret;
-
-	ret = 0;
-	if (!afs_lock_manager) {
-		mutex_lock(&afs_lock_manager_mutex);
-		if (!afs_lock_manager) {
-			afs_lock_manager = alloc_workqueue("kafs_lockd",
-							   WQ_MEM_RECLAIM, 0);
-			if (!afs_lock_manager)
-				ret = -ENOMEM;
-		}
-		mutex_unlock(&afs_lock_manager_mutex);
-	}
-	return ret;
-}
-
-/*
- * destroy the lock manager thread if it's running
- */
-void __exit afs_kill_lock_manager(void)
-{
-	if (afs_lock_manager)
-		destroy_workqueue(afs_lock_manager);
-}
-
 /*
  * if the callback is broken on this vnode, then the lock may now be available
  */
@@ -264,10 +233,6 @@ static int afs_do_setlk(struct file *file, struct file_lock *fl)
 	if (fl->fl_start != 0 || fl->fl_end != OFFSET_MAX)
 		return -EINVAL;
 
-	ret = afs_init_lock_manager();
-	if (ret < 0)
-		return ret;
-
 	fl->fl_ops = &afs_lock_ops;
 	INIT_LIST_HEAD(&fl->fl_u.afs.link);
 	fl->fl_u.afs.state = AFS_LOCK_PENDING;

fs/afs/fsclient.c

@@ -284,12 +284,13 @@ int afs_fs_fetch_file_status(struct afs_server *server,
 			     bool async)
 {
 	struct afs_call *call;
+	struct afs_net *net = afs_v2net(vnode);
 	__be32 *bp;
 
 	_enter(",%x,{%x:%u},,",
 	       key_serial(key), vnode->fid.vid, vnode->fid.vnode);
 
-	call = afs_alloc_flat_call(&afs_RXFSFetchStatus, 16, (21 + 3 + 6) * 4);
+	call = afs_alloc_flat_call(net, &afs_RXFSFetchStatus, 16, (21 + 3 + 6) * 4);
 	if (!call)
 		return -ENOMEM;
 
@@ -490,11 +491,12 @@ static int afs_fs_fetch_data64(struct afs_server *server,
 			       bool async)
 {
 	struct afs_call *call;
+	struct afs_net *net = afs_v2net(vnode);
 	__be32 *bp;
 
 	_enter("");
 
-	call = afs_alloc_flat_call(&afs_RXFSFetchData64, 32, (21 + 3 + 6) * 4);
+	call = afs_alloc_flat_call(net, &afs_RXFSFetchData64, 32, (21 + 3 + 6) * 4);
 	if (!call)
 		return -ENOMEM;
 
@@ -531,6 +533,7 @@ int afs_fs_fetch_data(struct afs_server *server,
 		      bool async)
 {
 	struct afs_call *call;
+	struct afs_net *net = afs_v2net(vnode);
 	__be32 *bp;
 
 	if (upper_32_bits(req->pos) ||
@@ -540,7 +543,7 @@ int afs_fs_fetch_data(struct afs_server *server,
 
 	_enter("");
 
-	call = afs_alloc_flat_call(&afs_RXFSFetchData, 24, (21 + 3 + 6) * 4);
+	call = afs_alloc_flat_call(net, &afs_RXFSFetchData, 24, (21 + 3 + 6) * 4);
 	if (!call)
 		return -ENOMEM;
 
@@ -590,7 +593,8 @@ static const struct afs_call_type afs_RXFSGiveUpCallBacks = {
  * give up a set of callbacks
  * - the callbacks are held in the server->cb_break ring
  */
-int afs_fs_give_up_callbacks(struct afs_server *server,
+int afs_fs_give_up_callbacks(struct afs_net *net,
+			     struct afs_server *server,
 			     bool async)
 {
 	struct afs_call *call;
@@ -610,7 +614,7 @@ int afs_fs_give_up_callbacks(struct afs_server *server,
 
 	_debug("break %zu callbacks", ncallbacks);
 
-	call = afs_alloc_flat_call(&afs_RXFSGiveUpCallBacks,
+	call = afs_alloc_flat_call(net, &afs_RXFSGiveUpCallBacks,
 				   12 + ncallbacks * 6 * 4, 0);
 	if (!call)
 		return -ENOMEM;
@@ -699,6 +703,7 @@ int afs_fs_create(struct afs_server *server,
 		  bool async)
 {
 	struct afs_call *call;
+	struct afs_net *net = afs_v2net(vnode);
 	size_t namesz, reqsz, padsz;
 	__be32 *bp;
 
@@ -708,7 +713,7 @@ int afs_fs_create(struct afs_server *server,
 	padsz = (4 - (namesz & 3)) & 3;
 	reqsz = (5 * 4) + namesz + padsz + (6 * 4);
 
-	call = afs_alloc_flat_call(&afs_RXFSCreateXXXX, reqsz,
+	call = afs_alloc_flat_call(net, &afs_RXFSCreateXXXX, reqsz,
 				   (3 + 21 + 21 + 3 + 6) * 4);
 	if (!call)
 		return -ENOMEM;
@@ -789,6 +794,7 @@ int afs_fs_remove(struct afs_server *server,
 		  bool async)
 {
 	struct afs_call *call;
+	struct afs_net *net = afs_v2net(vnode);
 	size_t namesz, reqsz, padsz;
 	__be32 *bp;
 
@@ -798,7 +804,7 @@ int afs_fs_remove(struct afs_server *server,
 	padsz = (4 - (namesz & 3)) & 3;
 	reqsz = (5 * 4) + namesz + padsz;
 
-	call = afs_alloc_flat_call(&afs_RXFSRemoveXXXX, reqsz, (21 + 6) * 4);
+	call = afs_alloc_flat_call(net, &afs_RXFSRemoveXXXX, reqsz, (21 + 6) * 4);
 	if (!call)
 		return -ENOMEM;
 
@@ -870,6 +876,7 @@ int afs_fs_link(struct afs_server *server,
 		bool async)
 {
 	struct afs_call *call;
+	struct afs_net *net = afs_v2net(vnode);
 	size_t namesz, reqsz, padsz;
 	__be32 *bp;
 
@@ -879,7 +886,7 @@ int afs_fs_link(struct afs_server *server,
 	padsz = (4 - (namesz & 3)) & 3;
 	reqsz = (5 * 4) + namesz + padsz + (3 * 4);
 
-	call = afs_alloc_flat_call(&afs_RXFSLink, reqsz, (21 + 21 + 6) * 4);
+	call = afs_alloc_flat_call(net, &afs_RXFSLink, reqsz, (21 + 21 + 6) * 4);
 	if (!call)
 		return -ENOMEM;
 
@@ -958,6 +965,7 @@ int afs_fs_symlink(struct afs_server *server,
 		   bool async)
 {
 	struct afs_call *call;
+	struct afs_net *net = afs_v2net(vnode);
 	size_t namesz, reqsz, padsz, c_namesz, c_padsz;
 	__be32 *bp;
 
@@ -971,7 +979,7 @@ int afs_fs_symlink(struct afs_server *server,
 
 	reqsz = (6 * 4) + namesz + padsz + c_namesz + c_padsz + (6 * 4);
 
-	call = afs_alloc_flat_call(&afs_RXFSSymlink, reqsz,
+	call = afs_alloc_flat_call(net, &afs_RXFSSymlink, reqsz,
 				   (3 + 21 + 21 + 6) * 4);
 	if (!call)
 		return -ENOMEM;
@@ -1062,6 +1070,7 @@ int afs_fs_rename(struct afs_server *server,
 		  bool async)
 {
 	struct afs_call *call;
+	struct afs_net *net = afs_v2net(orig_dvnode);
 	size_t reqsz, o_namesz, o_padsz, n_namesz, n_padsz;
 	__be32 *bp;
 
@@ -1078,7 +1087,7 @@ int afs_fs_rename(struct afs_server *server,
 		(3 * 4) +
 		4 + n_namesz + n_padsz;
 
-	call = afs_alloc_flat_call(&afs_RXFSRename, reqsz, (21 + 21 + 6) * 4);
+	call = afs_alloc_flat_call(net, &afs_RXFSRename, reqsz, (21 + 21 + 6) * 4);
 	if (!call)
 		return -ENOMEM;
 
@@ -1172,12 +1181,13 @@ static int afs_fs_store_data64(struct afs_server *server,
 {
 	struct afs_vnode *vnode = wb->vnode;
 	struct afs_call *call;
+	struct afs_net *net = afs_v2net(vnode);
 	__be32 *bp;
 
 	_enter(",%x,{%x:%u},,",
 	       key_serial(wb->key), vnode->fid.vid, vnode->fid.vnode);
 
-	call = afs_alloc_flat_call(&afs_RXFSStoreData64,
+	call = afs_alloc_flat_call(net, &afs_RXFSStoreData64,
 				   (4 + 6 + 3 * 2) * 4,
 				   (21 + 6) * 4);
 	if (!call)
@@ -1230,6 +1240,7 @@ int afs_fs_store_data(struct afs_server *server, struct afs_writeback *wb,
 {
 	struct afs_vnode *vnode = wb->vnode;
 	struct afs_call *call;
+	struct afs_net *net = afs_v2net(vnode);
 	loff_t size, pos, i_size;
 	__be32 *bp;
 
@@ -1254,7 +1265,7 @@ int afs_fs_store_data(struct afs_server *server, struct afs_writeback *wb,
 		return afs_fs_store_data64(server, wb, first, last, offset, to,
 					   size, pos, i_size, async);
 
-	call = afs_alloc_flat_call(&afs_RXFSStoreData,
+	call = afs_alloc_flat_call(net, &afs_RXFSStoreData,
 				   (4 + 6 + 3) * 4,
 				   (21 + 6) * 4);
 	if (!call)
@@ -1356,6 +1367,7 @@ static int afs_fs_setattr_size64(struct afs_server *server, struct key *key,
 				 bool async)
 {
 	struct afs_call *call;
+	struct afs_net *net = afs_v2net(vnode);
 	__be32 *bp;
 
 	_enter(",%x,{%x:%u},,",
@@ -1363,7 +1375,7 @@ static int afs_fs_setattr_size64(struct afs_server *server, struct key *key,
 
 	ASSERT(attr->ia_valid & ATTR_SIZE);
 
-	call = afs_alloc_flat_call(&afs_RXFSStoreData64_as_Status,
+	call = afs_alloc_flat_call(net, &afs_RXFSStoreData64_as_Status,
 				   (4 + 6 + 3 * 2) * 4,
 				   (21 + 6) * 4);
 	if (!call)
@@ -1404,6 +1416,7 @@ static int afs_fs_setattr_size(struct afs_server *server, struct key *key,
 			       bool async)
 {
 	struct afs_call *call;
+	struct afs_net *net = afs_v2net(vnode);
 	__be32 *bp;
 
 	_enter(",%x,{%x:%u},,",
@@ -1414,7 +1427,7 @@ static int afs_fs_setattr_size(struct afs_server *server, struct key *key,
 		return afs_fs_setattr_size64(server, key, vnode, attr,
 					     async);
 
-	call = afs_alloc_flat_call(&afs_RXFSStoreData_as_Status,
+	call = afs_alloc_flat_call(net, &afs_RXFSStoreData_as_Status,
 				   (4 + 6 + 3) * 4,
 				   (21 + 6) * 4);
 	if (!call)
@@ -1452,6 +1465,7 @@ int afs_fs_setattr(struct afs_server *server, struct key *key,
 		   bool async)
 {
 	struct afs_call *call;
+	struct afs_net *net = afs_v2net(vnode);
 	__be32 *bp;
 
 	if (attr->ia_valid & ATTR_SIZE)
@@ -1461,7 +1475,7 @@ int afs_fs_setattr(struct afs_server *server, struct key *key,
 	_enter(",%x,{%x:%u},,",
 	       key_serial(key), vnode->fid.vid, vnode->fid.vnode);
 
-	call = afs_alloc_flat_call(&afs_RXFSStoreStatus,
+	call = afs_alloc_flat_call(net, &afs_RXFSStoreStatus,
 				   (4 + 6) * 4,
 				   (21 + 6) * 4);
 	if (!call)
@@ -1687,6 +1701,7 @@ int afs_fs_get_volume_status(struct afs_server *server,
 			     bool async)
 {
 	struct afs_call *call;
+	struct afs_net *net = afs_v2net(vnode);
 	__be32 *bp;
 	void *tmpbuf;
 
@@ -1696,7 +1711,7 @@ int afs_fs_get_volume_status(struct afs_server *server,
 	if (!tmpbuf)
 		return -ENOMEM;
 
-	call = afs_alloc_flat_call(&afs_RXFSGetVolumeStatus, 2 * 4, 12 * 4);
+	call = afs_alloc_flat_call(net, &afs_RXFSGetVolumeStatus, 2 * 4, 12 * 4);
 	if (!call) {
 		kfree(tmpbuf);
 		return -ENOMEM;
@@ -1779,11 +1794,12 @@ int afs_fs_set_lock(struct afs_server *server,
 		    bool async)
 {
 	struct afs_call *call;
+	struct afs_net *net = afs_v2net(vnode);
 	__be32 *bp;
 
 	_enter("");
 
-	call = afs_alloc_flat_call(&afs_RXFSSetLock, 5 * 4, 6 * 4);
+	call = afs_alloc_flat_call(net, &afs_RXFSSetLock, 5 * 4, 6 * 4);
 	if (!call)
 		return -ENOMEM;
 
@@ -1812,11 +1828,12 @@ int afs_fs_extend_lock(struct afs_server *server,
 		       bool async)
 {
 	struct afs_call *call;
+	struct afs_net *net = afs_v2net(vnode);
 	__be32 *bp;
 
 	_enter("");
 
-	call = afs_alloc_flat_call(&afs_RXFSExtendLock, 4 * 4, 6 * 4);
+	call = afs_alloc_flat_call(net, &afs_RXFSExtendLock, 4 * 4, 6 * 4);
 	if (!call)
 		return -ENOMEM;
 
@@ -1844,11 +1861,12 @@ int afs_fs_release_lock(struct afs_server *server,
 			bool async)
 {
 	struct afs_call *call;
+	struct afs_net *net = afs_v2net(vnode);
 	__be32 *bp;
 
 	_enter("");
 
-	call = afs_alloc_flat_call(&afs_RXFSReleaseLock, 4 * 4, 6 * 4);
+	call = afs_alloc_flat_call(net, &afs_RXFSReleaseLock, 4 * 4, 6 * 4);
 	if (!call)
 		return -ENOMEM;
 

fs/afs/internal.h

@@ -21,6 +21,7 @@
 #include <linux/fscache.h>
 #include <linux/backing-dev.h>
 #include <linux/uuid.h>
+#include <net/net_namespace.h>
 #include <net/af_rxrpc.h>
 
 #include "afs.h"
@@ -48,6 +49,7 @@ struct afs_mount_params {
 	afs_voltype_t		type;		/* type of volume requested */
 	int			volnamesz;	/* size of volume name */
 	const char		*volname;	/* name of volume to mount */
+	struct afs_net		*net;		/* Network namespace in effect */
 	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 */
@@ -62,6 +64,7 @@ enum afs_call_state {
 	AFS_CALL_AWAIT_ACK,	/* awaiting final ACK of incoming call */
 	AFS_CALL_COMPLETE,	/* Completed or failed */
 };
+
 /*
  * a record of an in-progress RxRPC call
  */
@@ -72,6 +75,7 @@ struct afs_call {
 	struct work_struct	work;		/* actual work processor */
 	struct rxrpc_call	*rxcall;	/* RxRPC call handle */
 	struct key		*key;		/* security for this call */
+	struct afs_net		*net;		/* The network namespace */
 	struct afs_server	*server;	/* server affected by incoming CM call */
 	void			*request;	/* request data (first part) */
 	struct address_space	*mapping;	/* page set */
@@ -173,6 +177,7 @@ struct afs_writeback {
  * - there's one superblock per volume
  */
 struct afs_super_info {
+	struct afs_net		*net;		/* Network namespace */
 	struct afs_volume	*volume;	/* volume record */
 	char			rwparent;	/* T if parent is R/W AFS volume */
 };
@@ -192,12 +197,62 @@ struct afs_cache_cell {
 	struct in_addr	vl_servers[15];		/* cached cell VL servers */
 };
 
+/*
+ * AFS network namespace record.
+ */
+struct afs_net {
+	struct afs_uuid		uuid;
+	bool			live;		/* F if this namespace is being removed */
+
+	/* AF_RXRPC I/O stuff */
+	struct socket		*socket;
+	struct afs_call		*spare_incoming_call;
+	struct work_struct	charge_preallocation_work;
+	struct mutex		socket_mutex;
+	atomic_t		nr_outstanding_calls;
+	atomic_t		nr_superblocks;
+
+	/* Cell database */
+	struct list_head	cells;
+	struct afs_cell		*ws_cell;
+	rwlock_t		cells_lock;
+	struct rw_semaphore	cells_sem;
+	wait_queue_head_t	cells_freeable_wq;
+
+	struct rw_semaphore	proc_cells_sem;
+	struct list_head	proc_cells;
+
+	/* Volume location database */
+	struct list_head	vl_updates;		/* VL records in need-update order */
+	struct list_head	vl_graveyard;		/* Inactive VL records */
+	struct delayed_work	vl_reaper;
+	struct delayed_work	vl_updater;
+	spinlock_t		vl_updates_lock;
+	spinlock_t		vl_graveyard_lock;
+
+	/* File locking renewal management */
+	struct mutex		lock_manager_mutex;
+
+	/* Server database */
+	struct rb_root		servers;		/* Active servers */
+	rwlock_t		servers_lock;
+	struct list_head	server_graveyard;	/* Inactive server LRU list */
+	spinlock_t		server_graveyard_lock;
+	struct delayed_work	server_reaper;
+
+	/* Misc */
+	struct proc_dir_entry	*proc_afs;		/* /proc/net/afs directory */
+};
+
+extern struct afs_net __afs_net;// Dummy AFS network namespace; TODO: replace with real netns
+
 /*
  * AFS cell record
  */
 struct afs_cell {
 	atomic_t		usage;
 	struct list_head	link;		/* main cell list link */
+	struct afs_net		*net;		/* The network namespace */
 	struct key		*anonymous_key;	/* anonymous user key for this cell */
 	struct list_head	proc_link;	/* /proc cell list link */
 #ifdef CONFIG_AFS_FSCACHE
@@ -411,15 +466,6 @@ struct afs_interface {
 	unsigned	mtu;		/* MTU of interface */
 };
 
-struct afs_uuid {
-	__be32		time_low;			/* low part of timestamp */
-	__be16		time_mid;			/* mid part of timestamp */
-	__be16		time_hi_and_version;		/* high part of timestamp and version  */
-	__u8		clock_seq_hi_and_reserved;	/* clock seq hi and variant */
-	__u8		clock_seq_low;			/* clock seq low */
-	__u8		node[6];			/* spatially unique node ID (MAC addr) */
-};
-
 /*****************************************************************************/
 /*
  * cache.c
@@ -440,6 +486,8 @@ extern struct fscache_cookie_def afs_vnode_cache_index_def;
 /*
  * callback.c
  */
+extern struct workqueue_struct *afs_callback_update_worker;
+
 extern void afs_init_callback_state(struct afs_server *);
 extern void afs_broken_callback_work(struct work_struct *);
 extern void afs_break_callbacks(struct afs_server *, size_t,
@@ -448,22 +496,17 @@ extern void afs_discard_callback_on_delete(struct afs_vnode *);
 extern void afs_give_up_callback(struct afs_vnode *);
 extern void afs_dispatch_give_up_callbacks(struct work_struct *);
 extern void afs_flush_callback_breaks(struct afs_server *);
-extern int __init afs_callback_update_init(void);
-extern void afs_callback_update_kill(void);
 
 /*
  * cell.c
  */
-extern struct rw_semaphore afs_proc_cells_sem;
-extern struct list_head afs_proc_cells;
-
 #define afs_get_cell(C) do { atomic_inc(&(C)->usage); } while(0)
-extern int afs_cell_init(char *);
-extern struct afs_cell *afs_cell_create(const char *, unsigned, char *, bool);
-extern struct afs_cell *afs_cell_lookup(const char *, unsigned, bool);
+extern int afs_cell_init(struct afs_net *, char *);
+extern struct afs_cell *afs_cell_create(struct afs_net *, const char *, unsigned, char *, bool);
+extern struct afs_cell *afs_cell_lookup(struct afs_net *, const char *, unsigned, bool);
 extern struct afs_cell *afs_grab_cell(struct afs_cell *);
 extern void afs_put_cell(struct afs_cell *);
-extern void afs_cell_purge(void);
+extern void __net_exit afs_cell_purge(struct afs_net *);
 
 /*
  * cmservice.c
@@ -492,7 +535,8 @@ extern void afs_put_read(struct afs_read *);
 /*
  * flock.c
  */
-extern void __exit afs_kill_lock_manager(void);
+extern struct workqueue_struct *afs_lock_manager;
+
 extern void afs_lock_work(struct work_struct *);
 extern void afs_lock_may_be_available(struct afs_vnode *);
 extern int afs_lock(struct file *, int, struct file_lock *);
@@ -504,7 +548,7 @@ extern int afs_flock(struct file *, int, struct file_lock *);
 extern int afs_fs_fetch_file_status(struct afs_server *, struct key *,
 				    struct afs_vnode *, struct afs_volsync *,
 				    bool);
-extern int afs_fs_give_up_callbacks(struct afs_server *, bool);
+extern int afs_fs_give_up_callbacks(struct afs_net *, struct afs_server *, bool);
 extern int afs_fs_fetch_data(struct afs_server *, struct key *,
 			     struct afs_vnode *, struct afs_read *, bool);
 extern int afs_fs_create(struct afs_server *, struct key *,
@@ -554,7 +598,35 @@ extern int afs_drop_inode(struct inode *);
  * main.c
  */
 extern struct workqueue_struct *afs_wq;
-extern struct afs_uuid afs_uuid;
+
+static inline struct afs_net *afs_d2net(struct dentry *dentry)
+{
+	return &__afs_net;
+}
+
+static inline struct afs_net *afs_i2net(struct inode *inode)
+{
+	return &__afs_net;
+}
+
+static inline struct afs_net *afs_v2net(struct afs_vnode *vnode)
+{
+	return &__afs_net;
+}
+
+static inline struct afs_net *afs_sock2net(struct sock *sk)
+{
+	return &__afs_net;
+}
+
+static inline struct afs_net *afs_get_net(struct afs_net *net)
+{
+	return net;
+}
+
+static inline void afs_put_net(struct afs_net *net)
+{
+}
 
 /*
  * misc.c
@@ -579,23 +651,24 @@ extern int afs_get_ipv4_interfaces(struct afs_interface *, size_t, bool);
 /*
  * proc.c
  */
-extern int afs_proc_init(void);
-extern void afs_proc_cleanup(void);
-extern int afs_proc_cell_setup(struct afs_cell *);
-extern void afs_proc_cell_remove(struct afs_cell *);
+extern int __net_init afs_proc_init(struct afs_net *);
+extern void __net_exit afs_proc_cleanup(struct afs_net *);
+extern int afs_proc_cell_setup(struct afs_net *, struct afs_cell *);
+extern void afs_proc_cell_remove(struct afs_net *, struct afs_cell *);
 
 /*
  * rxrpc.c
  */
-extern struct socket *afs_socket;
-extern atomic_t afs_outstanding_calls;
+extern struct workqueue_struct *afs_async_calls;
 
-extern int afs_open_socket(void);
-extern void afs_close_socket(void);
+extern int __net_init afs_open_socket(struct afs_net *);
+extern void __net_exit afs_close_socket(struct afs_net *);
+extern void afs_charge_preallocation(struct work_struct *);
 extern void afs_put_call(struct afs_call *);
 extern int afs_queue_call_work(struct afs_call *);
 extern int afs_make_call(struct in_addr *, struct afs_call *, gfp_t, bool);
-extern struct afs_call *afs_alloc_flat_call(const struct afs_call_type *,
+extern struct afs_call *afs_alloc_flat_call(struct afs_net *,
+					    const struct afs_call_type *,
 					    size_t, size_t);
 extern void afs_flat_call_destructor(struct afs_call *);
 extern void afs_send_empty_reply(struct afs_call *);
@@ -629,37 +702,45 @@ do {								\
 
 extern struct afs_server *afs_lookup_server(struct afs_cell *,
 					    const struct in_addr *);
-extern struct afs_server *afs_find_server(const struct sockaddr_rxrpc *);
+extern struct afs_server *afs_find_server(struct afs_net *,
+					  const struct sockaddr_rxrpc *);
 extern void afs_put_server(struct afs_server *);
-extern void __exit afs_purge_servers(void);
+extern void afs_reap_server(struct work_struct *);
+extern void __net_exit afs_purge_servers(struct afs_net *);
 
 /*
  * super.c
  */
-extern int afs_fs_init(void);
-extern void afs_fs_exit(void);
+extern int __init afs_fs_init(void);
+extern void __exit afs_fs_exit(void);
 
 /*
  * vlclient.c
  */
-extern int afs_vl_get_entry_by_name(struct in_addr *, struct key *,
+extern int afs_vl_get_entry_by_name(struct afs_net *,
+				    struct in_addr *, struct key *,
 				    const char *, struct afs_cache_vlocation *,
 				    bool);
-extern int afs_vl_get_entry_by_id(struct in_addr *, struct key *,
+extern int afs_vl_get_entry_by_id(struct afs_net *,
+				  struct in_addr *, struct key *,
 				  afs_volid_t, afs_voltype_t,
 				  struct afs_cache_vlocation *, bool);
 
 /*
  * vlocation.c
  */
+extern struct workqueue_struct *afs_vlocation_update_worker;
+
 #define afs_get_vlocation(V) do { atomic_inc(&(V)->usage); } while(0)
 
-extern int __init afs_vlocation_update_init(void);
-extern struct afs_vlocation *afs_vlocation_lookup(struct afs_cell *,
+extern struct afs_vlocation *afs_vlocation_lookup(struct afs_net *,
+						  struct afs_cell *,
 						  struct key *,
 						  const char *, size_t);
-extern void afs_put_vlocation(struct afs_vlocation *);
-extern void afs_vlocation_purge(void);
+extern void afs_put_vlocation(struct afs_net *, struct afs_vlocation *);
+extern void afs_vlocation_updater(struct work_struct *);
+extern void afs_vlocation_reaper(struct work_struct *);
+extern void __net_exit afs_vlocation_purge(struct afs_net *);
 
 /*
  * vnode.c
@@ -707,7 +788,7 @@ extern int afs_vnode_release_lock(struct afs_vnode *, struct key *);
  */
 #define afs_get_volume(V) do { atomic_inc(&(V)->usage); } while(0)
 
-extern void afs_put_volume(struct afs_volume *);
+extern void afs_put_volume(struct afs_net *, struct afs_volume *);
 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 *,

fs/afs/main.c

@@ -31,30 +31,104 @@ static char *rootcell;
 module_param(rootcell, charp, 0);
 MODULE_PARM_DESC(rootcell, "root AFS cell name and VL server IP addr list");
 
-struct afs_uuid afs_uuid;
 struct workqueue_struct *afs_wq;
+struct afs_net __afs_net;
+
+/*
+ * Initialise an AFS network namespace record.
+ */
+static int __net_init afs_net_init(struct afs_net *net)
+{
+	int ret;
+
+	net->live = true;
+	generate_random_uuid((unsigned char *)&net->uuid);
+
+	INIT_WORK(&net->charge_preallocation_work, afs_charge_preallocation);
+	mutex_init(&net->socket_mutex);
+	INIT_LIST_HEAD(&net->cells);
+	rwlock_init(&net->cells_lock);
+	init_rwsem(&net->cells_sem);
+	init_waitqueue_head(&net->cells_freeable_wq);
+	init_rwsem(&net->proc_cells_sem);
+	INIT_LIST_HEAD(&net->proc_cells);
+	INIT_LIST_HEAD(&net->vl_updates);
+	INIT_LIST_HEAD(&net->vl_graveyard);
+	INIT_DELAYED_WORK(&net->vl_reaper, afs_vlocation_reaper);
+	INIT_DELAYED_WORK(&net->vl_updater, afs_vlocation_updater);
+	spin_lock_init(&net->vl_updates_lock);
+	spin_lock_init(&net->vl_graveyard_lock);
+	net->servers = RB_ROOT;
+	rwlock_init(&net->servers_lock);
+	INIT_LIST_HEAD(&net->server_graveyard);
+	spin_lock_init(&net->server_graveyard_lock);
+	INIT_DELAYED_WORK(&net->server_reaper, afs_reap_server);
+
+	/* Register the /proc stuff */
+	ret = afs_proc_init(net);
+	if (ret < 0)
+		goto error_proc;
+
+	/* Initialise the cell DB */
+	ret = afs_cell_init(net, rootcell);
+	if (ret < 0)
+		goto error_cell_init;
+
+	/* Create the RxRPC transport */
+	ret = afs_open_socket(net);
+	if (ret < 0)
+		goto error_open_socket;
+
+	return 0;
+
+error_open_socket:
+	afs_vlocation_purge(net);
+	afs_cell_purge(net);
+error_cell_init:
+	afs_proc_cleanup(net);
+error_proc:
+	return ret;
+}
+
+/*
+ * Clean up and destroy an AFS network namespace record.
+ */
+static void __net_exit afs_net_exit(struct afs_net *net)
+{
+	net->live = false;
+	afs_close_socket(net);
+	afs_purge_servers(net);
+	afs_vlocation_purge(net);
+	afs_cell_purge(net);
+	afs_proc_cleanup(net);
+}
 
 /*
  * initialise the AFS client FS module
  */
 static int __init afs_init(void)
 {
-	int ret;
+	int ret = -ENOMEM;
 
 	printk(KERN_INFO "kAFS: Red Hat AFS client v0.1 registering.\n");
 
-	generate_random_uuid((unsigned char *)&afs_uuid);
-
-	/* create workqueue */
-	ret = -ENOMEM;
 	afs_wq = alloc_workqueue("afs", 0, 0);
 	if (!afs_wq)
-		return ret;
-
-	/* register the /proc stuff */
-	ret = afs_proc_init();
-	if (ret < 0)
-		goto error_proc;
+		goto error_afs_wq;
+	afs_async_calls = alloc_workqueue("kafsd", WQ_MEM_RECLAIM, 0);
+	if (!afs_async_calls)
+		goto error_async;
+	afs_vlocation_update_worker =
+		alloc_workqueue("kafs_vlupdated", WQ_MEM_RECLAIM, 0);
+	if (!afs_vlocation_update_worker)
+		goto error_vl_up;
+	afs_callback_update_worker =
+		alloc_ordered_workqueue("kafs_callbackd", WQ_MEM_RECLAIM);
+	if (!afs_callback_update_worker)
+		goto error_callback;
+	afs_lock_manager = alloc_workqueue("kafs_lockd", WQ_MEM_RECLAIM, 0);
+	if (!afs_lock_manager)
+		goto error_lockmgr;
 
 #ifdef CONFIG_AFS_FSCACHE
 	/* we want to be able to cache */
@@ -63,25 +137,9 @@ static int __init afs_init(void)
 		goto error_cache;
 #endif
 
-	/* initialise the cell DB */
-	ret = afs_cell_init(rootcell);
-	if (ret < 0)
-		goto error_cell_init;
-
-	/* initialise the VL update process */
-	ret = afs_vlocation_update_init();
-	if (ret < 0)
-		goto error_vl_update_init;
-
-	/* initialise the callback update process */
-	ret = afs_callback_update_init();
+	ret = afs_net_init(&__afs_net);
 	if (ret < 0)
-		goto error_callback_update_init;
-
-	/* create the RxRPC transport */
-	ret = afs_open_socket();
-	if (ret < 0)
-		goto error_open_socket;
+		goto error_net;
 
 	/* register the filesystems */
 	ret = afs_fs_init();
@@ -91,21 +149,22 @@ static int __init afs_init(void)
 	return ret;
 
 error_fs:
-	afs_close_socket();
-error_open_socket:
-	afs_callback_update_kill();
-error_callback_update_init:
-	afs_vlocation_purge();
-error_vl_update_init:
-	afs_cell_purge();
-error_cell_init:
+	afs_net_exit(&__afs_net);
+error_net:
 #ifdef CONFIG_AFS_FSCACHE
 	fscache_unregister_netfs(&afs_cache_netfs);
 error_cache:
 #endif
-	afs_proc_cleanup();
-error_proc:
+	destroy_workqueue(afs_lock_manager);
+error_lockmgr:
+	destroy_workqueue(afs_callback_update_worker);
+error_callback:
+	destroy_workqueue(afs_vlocation_update_worker);
+error_vl_up:
+	destroy_workqueue(afs_async_calls);
+error_async:
 	destroy_workqueue(afs_wq);
+error_afs_wq:
 	rcu_barrier();
 	printk(KERN_ERR "kAFS: failed to register: %d\n", ret);
 	return ret;
@@ -124,17 +183,15 @@ static void __exit afs_exit(void)
 	printk(KERN_INFO "kAFS: Red Hat AFS client v0.1 unregistering.\n");
 
 	afs_fs_exit();
-	afs_kill_lock_manager();
-	afs_close_socket();
-	afs_purge_servers();
-	afs_callback_update_kill();
-	afs_vlocation_purge();
-	destroy_workqueue(afs_wq);
-	afs_cell_purge();
+	afs_net_exit(&__afs_net);
 #ifdef CONFIG_AFS_FSCACHE
 	fscache_unregister_netfs(&afs_cache_netfs);
 #endif
-	afs_proc_cleanup();
+	destroy_workqueue(afs_lock_manager);
+	destroy_workqueue(afs_callback_update_worker);
+	destroy_workqueue(afs_vlocation_update_worker);
+	destroy_workqueue(afs_async_calls);
+	destroy_workqueue(afs_wq);
 	rcu_barrier();
 }
 

fs/afs/proc.c

@@ -17,8 +17,15 @@
 #include <linux/uaccess.h>
 #include "internal.h"
 
-static struct proc_dir_entry *proc_afs;
+static inline struct afs_net *afs_proc2net(struct file *f)
+{
+	return &__afs_net;
+}
 
+static inline struct afs_net *afs_seq2net(struct seq_file *m)
+{
+	return &__afs_net; // TODO: use seq_file_net(m)
+}
 
 static int afs_proc_cells_open(struct inode *inode, struct file *file);
 static void *afs_proc_cells_start(struct seq_file *p, loff_t *pos);
@@ -122,23 +129,23 @@ static const struct file_operations afs_proc_cell_servers_fops = {
 /*
  * initialise the /proc/fs/afs/ directory
  */
-int afs_proc_init(void)
+int afs_proc_init(struct afs_net *net)
 {
 	_enter("");
 
-	proc_afs = proc_mkdir("fs/afs", NULL);
-	if (!proc_afs)
+	net->proc_afs = proc_mkdir("fs/afs", NULL);
+	if (!net->proc_afs)
 		goto error_dir;
 
-	if (!proc_create("cells", 0644, proc_afs, &afs_proc_cells_fops) ||
-	    !proc_create("rootcell", 0644, proc_afs, &afs_proc_rootcell_fops))
+	if (!proc_create("cells", 0644, net->proc_afs, &afs_proc_cells_fops) ||
+	    !proc_create("rootcell", 0644, net->proc_afs, &afs_proc_rootcell_fops))
 		goto error_tree;
 
 	_leave(" = 0");
 	return 0;
 
 error_tree:
-	remove_proc_subtree("fs/afs", NULL);
+	proc_remove(net->proc_afs);
 error_dir:
 	_leave(" = -ENOMEM");
 	return -ENOMEM;
@@ -147,9 +154,10 @@ error_dir:
 /*
  * clean up the /proc/fs/afs/ directory
  */
-void afs_proc_cleanup(void)
+void afs_proc_cleanup(struct afs_net *net)
 {
-	remove_proc_subtree("fs/afs", NULL);
+	proc_remove(net->proc_afs);
+	net->proc_afs = NULL;
 }
 
 /*
@@ -176,25 +184,30 @@ static int afs_proc_cells_open(struct inode *inode, struct file *file)
  */
 static void *afs_proc_cells_start(struct seq_file *m, loff_t *_pos)
 {
-	/* lock the list against modification */
-	down_read(&afs_proc_cells_sem);
-	return seq_list_start_head(&afs_proc_cells, *_pos);
+	struct afs_net *net = afs_seq2net(m);
+
+	down_read(&net->proc_cells_sem);
+	return seq_list_start_head(&net->proc_cells, *_pos);
 }
 
 /*
  * move to next cell in cells list
  */
-static void *afs_proc_cells_next(struct seq_file *p, void *v, loff_t *pos)
+static void *afs_proc_cells_next(struct seq_file *m, void *v, loff_t *pos)
 {
-	return seq_list_next(v, &afs_proc_cells, pos);
+	struct afs_net *net = afs_seq2net(m);
+
+	return seq_list_next(v, &net->proc_cells, pos);
 }
 
 /*
  * clean up after reading from the cells list
  */
-static void afs_proc_cells_stop(struct seq_file *p, void *v)
+static void afs_proc_cells_stop(struct seq_file *m, void *v)
 {
-	up_read(&afs_proc_cells_sem);
+	struct afs_net *net = afs_seq2net(m);
+
+	up_read(&net->proc_cells_sem);
 }
 
 /*
@@ -203,8 +216,9 @@ static void afs_proc_cells_stop(struct seq_file *p, void *v)
 static int afs_proc_cells_show(struct seq_file *m, void *v)
 {
 	struct afs_cell *cell = list_entry(v, struct afs_cell, proc_link);
+	struct afs_net *net = afs_seq2net(m);
 
-	if (v == &afs_proc_cells) {
+	if (v == &net->proc_cells) {
 		/* display header on line 1 */
 		seq_puts(m, "USE NAME\n");
 		return 0;
@@ -223,6 +237,7 @@ static int afs_proc_cells_show(struct seq_file *m, void *v)
 static ssize_t afs_proc_cells_write(struct file *file, const char __user *buf,
 				    size_t size, loff_t *_pos)
 {
+	struct afs_net *net = afs_proc2net(file);
 	char *kbuf, *name, *args;
 	int ret;
 
@@ -264,7 +279,7 @@ static ssize_t afs_proc_cells_write(struct file *file, const char __user *buf,
 	if (strcmp(kbuf, "add") == 0) {
 		struct afs_cell *cell;
 
-		cell = afs_cell_create(name, strlen(name), args, false);
+		cell = afs_cell_create(net, name, strlen(name), args, false);
 		if (IS_ERR(cell)) {
 			ret = PTR_ERR(cell);
 			goto done;
@@ -303,6 +318,7 @@ static ssize_t afs_proc_rootcell_write(struct file *file,
 				       const char __user *buf,
 				       size_t size, loff_t *_pos)
 {
+	struct afs_net *net = afs_proc2net(file);
 	char *kbuf, *s;
 	int ret;
 
@@ -322,7 +338,7 @@ static ssize_t afs_proc_rootcell_write(struct file *file,
 	/* determine command to perform */
 	_debug("rootcell=%s", kbuf);
 
-	ret = afs_cell_init(kbuf);
+	ret = afs_cell_init(net, kbuf);
 	if (ret >= 0)
 		ret = size;	/* consume everything, always */
 
@@ -334,13 +350,13 @@ static ssize_t afs_proc_rootcell_write(struct file *file,
 /*
  * initialise /proc/fs/afs/<cell>/
  */
-int afs_proc_cell_setup(struct afs_cell *cell)
+int afs_proc_cell_setup(struct afs_net *net, struct afs_cell *cell)
 {
 	struct proc_dir_entry *dir;
 
 	_enter("%p{%s}", cell, cell->name);
 
-	dir = proc_mkdir(cell->name, proc_afs);
+	dir = proc_mkdir(cell->name, net->proc_afs);
 	if (!dir)
 		goto error_dir;
 
@@ -356,7 +372,7 @@ int afs_proc_cell_setup(struct afs_cell *cell)
 	return 0;
 
 error_tree:
-	remove_proc_subtree(cell->name, proc_afs);
+	remove_proc_subtree(cell->name, net->proc_afs);
 error_dir:
 	_leave(" = -ENOMEM");
 	return -ENOMEM;
@@ -365,11 +381,11 @@ error_dir:
 /*
  * remove /proc/fs/afs/<cell>/
  */
-void afs_proc_cell_remove(struct afs_cell *cell)
+void afs_proc_cell_remove(struct afs_net *net, struct afs_cell *cell)
 {
 	_enter("");
 
-	remove_proc_subtree(cell->name, proc_afs);
+	remove_proc_subtree(cell->name, net->proc_afs);
 
 	_leave("");
 }

fs/afs/rxrpc.c

@@ -17,10 +17,7 @@
 #include "internal.h"
 #include "afs_cm.h"
 
-struct socket *afs_socket; /* my RxRPC socket */
-static struct workqueue_struct *afs_async_calls;
-static struct afs_call *afs_spare_incoming_call;
-atomic_t afs_outstanding_calls;
+struct workqueue_struct *afs_async_calls;
 
 static void afs_wake_up_call_waiter(struct sock *, struct rxrpc_call *, unsigned long);
 static int afs_wait_for_call_to_complete(struct afs_call *);
@@ -37,15 +34,11 @@ static const struct afs_call_type afs_RXCMxxxx = {
 	.abort_to_error	= afs_abort_to_error,
 };
 
-static void afs_charge_preallocation(struct work_struct *);
-
-static DECLARE_WORK(afs_charge_preallocation_work, afs_charge_preallocation);
-
 /*
  * open an RxRPC socket and bind it to be a server for callback notifications
  * - the socket is left in blocking mode and non-blocking ops use MSG_DONTWAIT
  */
-int afs_open_socket(void)
+int afs_open_socket(struct afs_net *net)
 {
 	struct sockaddr_rxrpc srx;
 	struct socket *socket;
@@ -53,11 +46,6 @@ int afs_open_socket(void)
 
 	_enter("");
 
-	ret = -ENOMEM;
-	afs_async_calls = alloc_workqueue("kafsd", WQ_MEM_RECLAIM, 0);
-	if (!afs_async_calls)
-		goto error_0;
-
 	ret = sock_create_kern(&init_net, AF_RXRPC, SOCK_DGRAM, PF_INET, &socket);
 	if (ret < 0)
 		goto error_1;
@@ -85,16 +73,14 @@ int afs_open_socket(void)
 	if (ret < 0)
 		goto error_2;
 
-	afs_socket = socket;
-	afs_charge_preallocation(NULL);
+	net->socket = socket;
+	afs_charge_preallocation(&net->charge_preallocation_work);
 	_leave(" = 0");
 	return 0;
 
 error_2:
 	sock_release(socket);
 error_1:
-	destroy_workqueue(afs_async_calls);
-error_0:
 	_leave(" = %d", ret);
 	return ret;
 }
@@ -102,36 +88,36 @@ error_0:
 /*
  * close the RxRPC socket AFS was using
  */
-void afs_close_socket(void)
+void afs_close_socket(struct afs_net *net)
 {
 	_enter("");
 
-	kernel_listen(afs_socket, 0);
+	kernel_listen(net->socket, 0);
 	flush_workqueue(afs_async_calls);
 
-	if (afs_spare_incoming_call) {
-		afs_put_call(afs_spare_incoming_call);
-		afs_spare_incoming_call = NULL;
+	if (net->spare_incoming_call) {
+		afs_put_call(net->spare_incoming_call);
+		net->spare_incoming_call = NULL;
 	}
 
-	_debug("outstanding %u", atomic_read(&afs_outstanding_calls));
-	wait_on_atomic_t(&afs_outstanding_calls, atomic_t_wait,
+	_debug("outstanding %u", atomic_read(&net->nr_outstanding_calls));
+	wait_on_atomic_t(&net->nr_outstanding_calls, atomic_t_wait,
 			 TASK_UNINTERRUPTIBLE);
 	_debug("no outstanding calls");
 
-	kernel_sock_shutdown(afs_socket, SHUT_RDWR);
+	kernel_sock_shutdown(net->socket, SHUT_RDWR);
 	flush_workqueue(afs_async_calls);
-	sock_release(afs_socket);
+	sock_release(net->socket);
 
 	_debug("dework");
-	destroy_workqueue(afs_async_calls);
 	_leave("");
 }
 
 /*
  * Allocate a call.
  */
-static struct afs_call *afs_alloc_call(const struct afs_call_type *type,
+static struct afs_call *afs_alloc_call(struct afs_net *net,
+				       const struct afs_call_type *type,
 				       gfp_t gfp)
 {
 	struct afs_call *call;
@@ -142,11 +128,12 @@ static struct afs_call *afs_alloc_call(const struct afs_call_type *type,
 		return NULL;
 
 	call->type = type;
+	call->net = net;
 	atomic_set(&call->usage, 1);
 	INIT_WORK(&call->async_work, afs_process_async_call);
 	init_waitqueue_head(&call->waitq);
 
-	o = atomic_inc_return(&afs_outstanding_calls);
+	o = atomic_inc_return(&net->nr_outstanding_calls);
 	trace_afs_call(call, afs_call_trace_alloc, 1, o,
 		       __builtin_return_address(0));
 	return call;
@@ -157,8 +144,9 @@ static struct afs_call *afs_alloc_call(const struct afs_call_type *type,
  */
 void afs_put_call(struct afs_call *call)
 {
+	struct afs_net *net = call->net;
 	int n = atomic_dec_return(&call->usage);
-	int o = atomic_read(&afs_outstanding_calls);
+	int o = atomic_read(&net->nr_outstanding_calls);
 
 	trace_afs_call(call, afs_call_trace_put, n + 1, o,
 		       __builtin_return_address(0));
@@ -169,7 +157,7 @@ void afs_put_call(struct afs_call *call)
 		ASSERT(call->type->name != NULL);
 
 		if (call->rxcall) {
-			rxrpc_kernel_end_call(afs_socket, call->rxcall);
+			rxrpc_kernel_end_call(net->socket, call->rxcall);
 			call->rxcall = NULL;
 		}
 		if (call->type->destructor)
@@ -178,11 +166,11 @@ void afs_put_call(struct afs_call *call)
 		kfree(call->request);
 		kfree(call);
 
-		o = atomic_dec_return(&afs_outstanding_calls);
+		o = atomic_dec_return(&net->nr_outstanding_calls);
 		trace_afs_call(call, afs_call_trace_free, 0, o,
 			       __builtin_return_address(0));
 		if (o == 0)
-			wake_up_atomic_t(&afs_outstanding_calls);
+			wake_up_atomic_t(&net->nr_outstanding_calls);
 	}
 }
 
@@ -194,7 +182,7 @@ int afs_queue_call_work(struct afs_call *call)
 	int u = atomic_inc_return(&call->usage);
 
 	trace_afs_call(call, afs_call_trace_work, u,
-		       atomic_read(&afs_outstanding_calls),
+		       atomic_read(&call->net->nr_outstanding_calls),
 		       __builtin_return_address(0));
 
 	INIT_WORK(&call->work, call->type->work);
@@ -207,12 +195,13 @@ int afs_queue_call_work(struct afs_call *call)
 /*
  * allocate a call with flat request and reply buffers
  */
-struct afs_call *afs_alloc_flat_call(const struct afs_call_type *type,
+struct afs_call *afs_alloc_flat_call(struct afs_net *net,
+				     const struct afs_call_type *type,
 				     size_t request_size, size_t reply_max)
 {
 	struct afs_call *call;
 
-	call = afs_alloc_call(type, GFP_NOFS);
+	call = afs_alloc_call(net, type, GFP_NOFS);
 	if (!call)
 		goto nomem_call;
 
@@ -317,7 +306,7 @@ static int afs_send_pages(struct afs_call *call, struct msghdr *msg)
 		bytes = msg->msg_iter.count;
 		nr = msg->msg_iter.nr_segs;
 
-		ret = rxrpc_kernel_send_data(afs_socket, call->rxcall, msg,
+		ret = rxrpc_kernel_send_data(call->net->socket, call->rxcall, msg,
 					     bytes, afs_notify_end_request_tx);
 		for (loop = 0; loop < nr; loop++)
 			put_page(bv[loop].bv_page);
@@ -352,7 +341,7 @@ int afs_make_call(struct in_addr *addr, struct afs_call *call, gfp_t gfp,
 
 	_debug("____MAKE %p{%s,%x} [%d]____",
 	       call, call->type->name, key_serial(call->key),
-	       atomic_read(&afs_outstanding_calls));
+	       atomic_read(&call->net->nr_outstanding_calls));
 
 	call->async = async;
 
@@ -376,7 +365,7 @@ int afs_make_call(struct in_addr *addr, struct afs_call *call, gfp_t gfp,
 	}
 
 	/* create a call */
-	rxcall = rxrpc_kernel_begin_call(afs_socket, &srx, call->key,
+	rxcall = rxrpc_kernel_begin_call(call->net->socket, &srx, call->key,
 					 (unsigned long)call,
 					 tx_total_len, gfp,
 					 (async ?
@@ -410,7 +399,7 @@ int afs_make_call(struct in_addr *addr, struct afs_call *call, gfp_t gfp,
 	 */
 	if (!call->send_pages)
 		call->state = AFS_CALL_AWAIT_REPLY;
-	ret = rxrpc_kernel_send_data(afs_socket, rxcall,
+	ret = rxrpc_kernel_send_data(call->net->socket, rxcall,
 				     &msg, call->request_size,
 				     afs_notify_end_request_tx);
 	if (ret < 0)
@@ -432,13 +421,14 @@ int afs_make_call(struct in_addr *addr, struct afs_call *call, gfp_t gfp,
 error_do_abort:
 	call->state = AFS_CALL_COMPLETE;
 	if (ret != -ECONNABORTED) {
-		rxrpc_kernel_abort_call(afs_socket, rxcall, RX_USER_ABORT,
-					ret, "KSD");
+		rxrpc_kernel_abort_call(call->net->socket, rxcall,
+					RX_USER_ABORT, ret, "KSD");
 	} else {
 		abort_code = 0;
 		offset = 0;
-		rxrpc_kernel_recv_data(afs_socket, rxcall, NULL, 0, &offset,
-				       false, &abort_code, &call->service_id);
+		rxrpc_kernel_recv_data(call->net->socket, rxcall, NULL,
+				       0, &offset, false, &abort_code,
+				       &call->service_id);
 		ret = call->type->abort_to_error(abort_code);
 	}
 error_kill_call:
@@ -464,7 +454,8 @@ static void afs_deliver_to_call(struct afs_call *call)
 	       ) {
 		if (call->state == AFS_CALL_AWAIT_ACK) {
 			size_t offset = 0;
-			ret = rxrpc_kernel_recv_data(afs_socket, call->rxcall,
+			ret = rxrpc_kernel_recv_data(call->net->socket,
+						     call->rxcall,
 						     NULL, 0, &offset, false,
 						     &call->abort_code,
 						     &call->service_id);
@@ -492,12 +483,12 @@ static void afs_deliver_to_call(struct afs_call *call)
 			goto call_complete;
 		case -ENOTCONN:
 			abort_code = RX_CALL_DEAD;
-			rxrpc_kernel_abort_call(afs_socket, call->rxcall,
+			rxrpc_kernel_abort_call(call->net->socket, call->rxcall,
 						abort_code, ret, "KNC");
 			goto save_error;
 		case -ENOTSUPP:
 			abort_code = RXGEN_OPCODE;
-			rxrpc_kernel_abort_call(afs_socket, call->rxcall,
+			rxrpc_kernel_abort_call(call->net->socket, call->rxcall,
 						abort_code, ret, "KIV");
 			goto save_error;
 		case -ENODATA:
@@ -507,7 +498,7 @@ static void afs_deliver_to_call(struct afs_call *call)
 			abort_code = RXGEN_CC_UNMARSHAL;
 			if (call->state != AFS_CALL_AWAIT_REPLY)
 				abort_code = RXGEN_SS_UNMARSHAL;
-			rxrpc_kernel_abort_call(afs_socket, call->rxcall,
+			rxrpc_kernel_abort_call(call->net->socket, call->rxcall,
 						abort_code, -EBADMSG, "KUM");
 			goto save_error;
 		}
@@ -541,13 +532,13 @@ static int afs_wait_for_call_to_complete(struct afs_call *call)
 
 	_enter("");
 
-	rtt = rxrpc_kernel_get_rtt(afs_socket, call->rxcall);
+	rtt = rxrpc_kernel_get_rtt(call->net->socket, call->rxcall);
 	rtt2 = nsecs_to_jiffies64(rtt) * 2;
 	if (rtt2 < 2)
 		rtt2 = 2;
 
 	timeout = rtt2;
-	last_life = rxrpc_kernel_check_life(afs_socket, call->rxcall);
+	last_life = rxrpc_kernel_check_life(call->net->socket, call->rxcall);
 
 	add_wait_queue(&call->waitq, &myself);
 	for (;;) {
@@ -564,7 +555,7 @@ static int afs_wait_for_call_to_complete(struct afs_call *call)
 		if (call->state == AFS_CALL_COMPLETE)
 			break;
 
-		life = rxrpc_kernel_check_life(afs_socket, call->rxcall);
+		life = rxrpc_kernel_check_life(call->net->socket, call->rxcall);
 		if (timeout == 0 &&
 		    life == last_life && signal_pending(current))
 				break;
@@ -583,7 +574,7 @@ static int afs_wait_for_call_to_complete(struct afs_call *call)
 	/* Kill off the call if it's still live. */
 	if (call->state < AFS_CALL_COMPLETE) {
 		_debug("call interrupted");
-		rxrpc_kernel_abort_call(afs_socket, call->rxcall,
+		rxrpc_kernel_abort_call(call->net->socket, call->rxcall,
 					RX_USER_ABORT, -EINTR, "KWI");
 	}
 
@@ -621,7 +612,7 @@ static void afs_wake_up_async_call(struct sock *sk, struct rxrpc_call *rxcall,
 	u = __atomic_add_unless(&call->usage, 1, 0);
 	if (u != 0) {
 		trace_afs_call(call, afs_call_trace_wake, u,
-			       atomic_read(&afs_outstanding_calls),
+			       atomic_read(&call->net->nr_outstanding_calls),
 			       __builtin_return_address(0));
 
 		if (!queue_work(afs_async_calls, &call->async_work))
@@ -685,13 +676,15 @@ static void afs_rx_attach(struct rxrpc_call *rxcall, unsigned long user_call_ID)
 /*
  * Charge the incoming call preallocation.
  */
-static void afs_charge_preallocation(struct work_struct *work)
+void afs_charge_preallocation(struct work_struct *work)
 {
-	struct afs_call *call = afs_spare_incoming_call;
+	struct afs_net *net =
+		container_of(work, struct afs_net, charge_preallocation_work);
+	struct afs_call *call = net->spare_incoming_call;
 
 	for (;;) {
 		if (!call) {
-			call = afs_alloc_call(&afs_RXCMxxxx, GFP_KERNEL);
+			call = afs_alloc_call(net, &afs_RXCMxxxx, GFP_KERNEL);
 			if (!call)
 				break;
 
@@ -700,7 +693,7 @@ static void afs_charge_preallocation(struct work_struct *work)
 			init_waitqueue_head(&call->waitq);
 		}
 
-		if (rxrpc_kernel_charge_accept(afs_socket,
+		if (rxrpc_kernel_charge_accept(net->socket,
 					       afs_wake_up_async_call,
 					       afs_rx_attach,
 					       (unsigned long)call,
@@ -708,7 +701,7 @@ static void afs_charge_preallocation(struct work_struct *work)
 			break;
 		call = NULL;
 	}
-	afs_spare_incoming_call = call;
+	net->spare_incoming_call = call;
 }
 
 /*
@@ -729,7 +722,9 @@ static void afs_rx_discard_new_call(struct rxrpc_call *rxcall,
 static void afs_rx_new_call(struct sock *sk, struct rxrpc_call *rxcall,
 			    unsigned long user_call_ID)
 {
-	queue_work(afs_wq, &afs_charge_preallocation_work);
+	struct afs_net *net = afs_sock2net(sk);
+
+	queue_work(afs_wq, &net->charge_preallocation_work);
 }
 
 /*
@@ -784,11 +779,12 @@ static void afs_notify_end_reply_tx(struct sock *sock,
  */
 void afs_send_empty_reply(struct afs_call *call)
 {
+	struct afs_net *net = call->net;
 	struct msghdr msg;
 
 	_enter("");
 
-	rxrpc_kernel_set_tx_length(afs_socket, call->rxcall, 0);
+	rxrpc_kernel_set_tx_length(net->socket, call->rxcall, 0);
 
 	msg.msg_name		= NULL;
 	msg.msg_namelen		= 0;
@@ -798,7 +794,7 @@ void afs_send_empty_reply(struct afs_call *call)
 	msg.msg_flags		= 0;
 
 	call->state = AFS_CALL_AWAIT_ACK;
-	switch (rxrpc_kernel_send_data(afs_socket, call->rxcall, &msg, 0,
+	switch (rxrpc_kernel_send_data(net->socket, call->rxcall, &msg, 0,
 				       afs_notify_end_reply_tx)) {
 	case 0:
 		_leave(" [replied]");
@@ -806,7 +802,7 @@ void afs_send_empty_reply(struct afs_call *call)
 
 	case -ENOMEM:
 		_debug("oom");
-		rxrpc_kernel_abort_call(afs_socket, call->rxcall,
+		rxrpc_kernel_abort_call(net->socket, call->rxcall,
 					RX_USER_ABORT, -ENOMEM, "KOO");
 	default:
 		_leave(" [error]");
@@ -819,13 +815,14 @@ void afs_send_empty_reply(struct afs_call *call)
  */
 void afs_send_simple_reply(struct afs_call *call, const void *buf, size_t len)
 {
+	struct afs_net *net = call->net;
 	struct msghdr msg;
 	struct kvec iov[1];
 	int n;
 
 	_enter("");
 
-	rxrpc_kernel_set_tx_length(afs_socket, call->rxcall, len);
+	rxrpc_kernel_set_tx_length(net->socket, call->rxcall, len);
 
 	iov[0].iov_base		= (void *) buf;
 	iov[0].iov_len		= len;
@@ -837,7 +834,7 @@ void afs_send_simple_reply(struct afs_call *call, const void *buf, size_t len)
 	msg.msg_flags		= 0;
 
 	call->state = AFS_CALL_AWAIT_ACK;
-	n = rxrpc_kernel_send_data(afs_socket, call->rxcall, &msg, len,
+	n = rxrpc_kernel_send_data(net->socket, call->rxcall, &msg, len,
 				   afs_notify_end_reply_tx);
 	if (n >= 0) {
 		/* Success */
@@ -847,7 +844,7 @@ void afs_send_simple_reply(struct afs_call *call, const void *buf, size_t len)
 
 	if (n == -ENOMEM) {
 		_debug("oom");
-		rxrpc_kernel_abort_call(afs_socket, call->rxcall,
+		rxrpc_kernel_abort_call(net->socket, call->rxcall,
 					RX_USER_ABORT, -ENOMEM, "KOO");
 	}
 	_leave(" [error]");
@@ -859,6 +856,7 @@ void afs_send_simple_reply(struct afs_call *call, const void *buf, size_t len)
 int afs_extract_data(struct afs_call *call, void *buf, size_t count,
 		     bool want_more)
 {
+	struct afs_net *net = call->net;
 	int ret;
 
 	_enter("{%s,%zu},,%zu,%d",
@@ -866,7 +864,7 @@ int afs_extract_data(struct afs_call *call, void *buf, size_t count,
 
 	ASSERTCMP(call->offset, <=, count);
 
-	ret = rxrpc_kernel_recv_data(afs_socket, call->rxcall,
+	ret = rxrpc_kernel_recv_data(net->socket, call->rxcall,
 				     buf, count, &call->offset,
 				     want_more, &call->abort_code,
 				     &call->service_id);

fs/afs/server.c

@@ -15,32 +15,22 @@
 
 static unsigned afs_server_timeout = 10;	/* server timeout in seconds */
 
-static void afs_reap_server(struct work_struct *);
-
-/* tree of all the servers, indexed by IP address */
-static struct rb_root afs_servers = RB_ROOT;
-static DEFINE_RWLOCK(afs_servers_lock);
-
-/* LRU list of all the servers not currently in use */
-static LIST_HEAD(afs_server_graveyard);
-static DEFINE_SPINLOCK(afs_server_graveyard_lock);
-static DECLARE_DELAYED_WORK(afs_server_reaper, afs_reap_server);
-
 /*
  * install a server record in the master tree
  */
 static int afs_install_server(struct afs_server *server)
 {
 	struct afs_server *xserver;
+	struct afs_net *net = server->cell->net;
 	struct rb_node **pp, *p;
 	int ret;
 
 	_enter("%p", server);
 
-	write_lock(&afs_servers_lock);
+	write_lock(&net->servers_lock);
 
 	ret = -EEXIST;
-	pp = &afs_servers.rb_node;
+	pp = &net->servers.rb_node;
 	p = NULL;
 	while (*pp) {
 		p = *pp;
@@ -55,11 +45,11 @@ static int afs_install_server(struct afs_server *server)
 	}
 
 	rb_link_node(&server->master_rb, p, pp);
-	rb_insert_color(&server->master_rb, &afs_servers);
+	rb_insert_color(&server->master_rb, &net->servers);
 	ret = 0;
 
 error:
-	write_unlock(&afs_servers_lock);
+	write_unlock(&net->servers_lock);
 	return ret;
 }
 
@@ -150,9 +140,9 @@ found_server_quickly:
 	read_unlock(&cell->servers_lock);
 no_longer_unused:
 	if (!list_empty(&server->grave)) {
-		spin_lock(&afs_server_graveyard_lock);
+		spin_lock(&cell->net->server_graveyard_lock);
 		list_del_init(&server->grave);
-		spin_unlock(&afs_server_graveyard_lock);
+		spin_unlock(&cell->net->server_graveyard_lock);
 	}
 	_leave(" = %p{%d}", server, atomic_read(&server->usage));
 	return server;
@@ -178,7 +168,8 @@ server_in_two_cells:
 /*
  * look up a server by its IP address
  */
-struct afs_server *afs_find_server(const struct sockaddr_rxrpc *srx)
+struct afs_server *afs_find_server(struct afs_net *net,
+				   const struct sockaddr_rxrpc *srx)
 {
 	struct afs_server *server = NULL;
 	struct rb_node *p;
@@ -191,9 +182,9 @@ struct afs_server *afs_find_server(const struct sockaddr_rxrpc *srx)
 		return NULL;
 	}
 
-	read_lock(&afs_servers_lock);
+	read_lock(&net->servers_lock);
 
-	p = afs_servers.rb_node;
+	p = net->servers.rb_node;
 	while (p) {
 		server = rb_entry(p, struct afs_server, master_rb);
 
@@ -211,7 +202,7 @@ struct afs_server *afs_find_server(const struct sockaddr_rxrpc *srx)
 
 	server = NULL;
 found:
-	read_unlock(&afs_servers_lock);
+	read_unlock(&net->servers_lock);
 	ASSERTIFCMP(server, server->addr.s_addr, ==, addr.s_addr);
 	_leave(" = %p", server);
 	return server;
@@ -223,6 +214,8 @@ found:
  */
 void afs_put_server(struct afs_server *server)
 {
+	struct afs_net *net = server->cell->net;
+
 	if (!server)
 		return;
 
@@ -239,14 +232,14 @@ void afs_put_server(struct afs_server *server)
 
 	afs_flush_callback_breaks(server);
 
-	spin_lock(&afs_server_graveyard_lock);
+	spin_lock(&net->server_graveyard_lock);
 	if (atomic_read(&server->usage) == 0) {
-		list_move_tail(&server->grave, &afs_server_graveyard);
+		list_move_tail(&server->grave, &net->server_graveyard);
 		server->time_of_death = ktime_get_real_seconds();
-		queue_delayed_work(afs_wq, &afs_server_reaper,
-				   afs_server_timeout * HZ);
+		queue_delayed_work(afs_wq, &net->server_reaper,
+				   net->live ? afs_server_timeout * HZ : 0);
 	}
-	spin_unlock(&afs_server_graveyard_lock);
+	spin_unlock(&net->server_graveyard_lock);
 	_leave(" [dead]");
 }
 
@@ -272,42 +265,45 @@ static void afs_destroy_server(struct afs_server *server)
 /*
  * reap dead server records
  */
-static void afs_reap_server(struct work_struct *work)
+void afs_reap_server(struct work_struct *work)
 {
 	LIST_HEAD(corpses);
 	struct afs_server *server;
+	struct afs_net *net = container_of(work, struct afs_net, server_reaper.work);
 	unsigned long delay, expiry;
 	time64_t now;
 
 	now = ktime_get_real_seconds();
-	spin_lock(&afs_server_graveyard_lock);
+	spin_lock(&net->server_graveyard_lock);
 
-	while (!list_empty(&afs_server_graveyard)) {
-		server = list_entry(afs_server_graveyard.next,
+	while (!list_empty(&net->server_graveyard)) {
+		server = list_entry(net->server_graveyard.next,
 				    struct afs_server, grave);
 
 		/* the queue is ordered most dead first */
-		expiry = server->time_of_death + afs_server_timeout;
-		if (expiry > now) {
-			delay = (expiry - now) * HZ;
-			mod_delayed_work(afs_wq, &afs_server_reaper, delay);
-			break;
+		if (net->live) {
+			expiry = server->time_of_death + afs_server_timeout;
+			if (expiry > now) {
+				delay = (expiry - now) * HZ;
+				mod_delayed_work(afs_wq, &net->server_reaper, delay);
+				break;
+			}
 		}
 
 		write_lock(&server->cell->servers_lock);
-		write_lock(&afs_servers_lock);
+		write_lock(&net->servers_lock);
 		if (atomic_read(&server->usage) > 0) {
 			list_del_init(&server->grave);
 		} else {
 			list_move_tail(&server->grave, &corpses);
 			list_del_init(&server->link);
-			rb_erase(&server->master_rb, &afs_servers);
+			rb_erase(&server->master_rb, &net->servers);
 		}
-		write_unlock(&afs_servers_lock);
+		write_unlock(&net->servers_lock);
 		write_unlock(&server->cell->servers_lock);
 	}
 
-	spin_unlock(&afs_server_graveyard_lock);
+	spin_unlock(&net->server_graveyard_lock);
 
 	/* now reap the corpses we've extracted */
 	while (!list_empty(&corpses)) {
@@ -318,10 +314,10 @@ static void afs_reap_server(struct work_struct *work)
 }
 
 /*
- * discard all the server records for rmmod
+ * Discard all the server records from a net namespace when it is destroyed or
+ * the afs module is removed.
  */
-void __exit afs_purge_servers(void)
+void __net_exit afs_purge_servers(struct afs_net *net)
 {
-	afs_server_timeout = 0;
-	mod_delayed_work(afs_wq, &afs_server_reaper, 0);
+	mod_delayed_work(afs_wq, &net->server_reaper, 0);
 }

fs/afs/super.c

@@ -25,11 +25,10 @@
 #include <linux/statfs.h>
 #include <linux/sched.h>
 #include <linux/nsproxy.h>
+#include <linux/magic.h>
 #include <net/net_namespace.h>
 #include "internal.h"
 
-#define AFS_FS_MAGIC 0x6B414653 /* 'kAFS' */
-
 static void afs_i_init_once(void *foo);
 static struct dentry *afs_mount(struct file_system_type *fs_type,
 		      int flags, const char *dev_name, void *data);
@@ -201,7 +200,8 @@ static int afs_parse_options(struct afs_mount_params *params,
 		token = match_token(p, afs_options_list, args);
 		switch (token) {
 		case afs_opt_cell:
-			cell = afs_cell_lookup(args[0].from,
+			cell = afs_cell_lookup(params->net,
+					       args[0].from,
 					       args[0].to - args[0].from,
 					       false);
 			if (IS_ERR(cell))
@@ -308,7 +308,7 @@ static int afs_parse_device_name(struct afs_mount_params *params,
 
 	/* lookup the cell record */
 	if (cellname || !params->cell) {
-		cell = afs_cell_lookup(cellname, cellnamesz, true);
+		cell = afs_cell_lookup(params->net, cellname, cellnamesz, true);
 		if (IS_ERR(cell)) {
 			printk(KERN_ERR "kAFS: unable to lookup cell '%*.*s'\n",
 			       cellnamesz, cellnamesz, cellname ?: "");
@@ -334,7 +334,7 @@ static int afs_test_super(struct super_block *sb, void *data)
 	struct afs_super_info *as1 = data;
 	struct afs_super_info *as = sb->s_fs_info;
 
-	return as->volume == as1->volume;
+	return as->net == as1->net && as->volume == as1->volume;
 }
 
 static int afs_set_super(struct super_block *sb, void *data)
@@ -411,6 +411,7 @@ static struct dentry *afs_mount(struct file_system_type *fs_type,
 	_enter(",,%s,%p", dev_name, options);
 
 	memset(&params, 0, sizeof(params));
+	params.net = &__afs_net;
 
 	ret = -EINVAL;
 	if (current->nsproxy->net_ns != &init_net)
@@ -444,36 +445,32 @@ static struct dentry *afs_mount(struct file_system_type *fs_type,
 	}
 
 	/* allocate a superblock info record */
+	ret = -ENOMEM;
 	as = kzalloc(sizeof(struct afs_super_info), GFP_KERNEL);
-	if (!as) {
-		ret = -ENOMEM;
-		afs_put_volume(vol);
-		goto error;
-	}
+	if (!as)
+		goto error_vol;
+
+	as->net = afs_get_net(params.net);
 	as->volume = vol;
 
 	/* allocate a deviceless superblock */
 	sb = sget(fs_type, afs_test_super, afs_set_super, flags, as);
 	if (IS_ERR(sb)) {
 		ret = PTR_ERR(sb);
-		afs_put_volume(vol);
-		kfree(as);
-		goto error;
+		goto error_as;
 	}
 
 	if (!sb->s_root) {
 		/* initial superblock/root creation */
 		_debug("create");
 		ret = afs_fill_super(sb, &params);
-		if (ret < 0) {
-			deactivate_locked_super(sb);
-			goto error;
-		}
+		if (ret < 0)
+			goto error_sb;
 		sb->s_flags |= MS_ACTIVE;
 	} else {
 		_debug("reuse");
 		ASSERTCMP(sb->s_flags, &, MS_ACTIVE);
-		afs_put_volume(vol);
+		afs_put_volume(params.net, vol);
 		kfree(as);
 	}
 
@@ -482,6 +479,14 @@ static struct dentry *afs_mount(struct file_system_type *fs_type,
 	_leave(" = 0 [%p]", sb);
 	return dget(sb->s_root);
 
+error_sb:
+	deactivate_locked_super(sb);
+	goto error;
+error_as:
+	afs_put_net(as->net);
+	kfree(as);
+error_vol:
+	afs_put_volume(params.net, vol);
 error:
 	afs_put_cell(params.cell);
 	key_put(params.key);
@@ -493,8 +498,10 @@ error:
 static void afs_kill_super(struct super_block *sb)
 {
 	struct afs_super_info *as = sb->s_fs_info;
+	struct afs_net *net = as->net;
+
 	kill_anon_super(sb);
-	afs_put_volume(as->volume);
+	afs_put_volume(net, as->volume);
 	kfree(as);
 }
 

fs/afs/vlclient.c

@@ -143,7 +143,8 @@ static const struct afs_call_type afs_RXVLGetEntryById = {
 /*
  * dispatch a get volume entry by name operation
  */
-int afs_vl_get_entry_by_name(struct in_addr *addr,
+int afs_vl_get_entry_by_name(struct afs_net *net,
+			     struct in_addr *addr,
 			     struct key *key,
 			     const char *volname,
 			     struct afs_cache_vlocation *entry,
@@ -159,7 +160,7 @@ int afs_vl_get_entry_by_name(struct in_addr *addr,
 	padsz = (4 - (volnamesz & 3)) & 3;
 	reqsz = 8 + volnamesz + padsz;
 
-	call = afs_alloc_flat_call(&afs_RXVLGetEntryByName, reqsz, 384);
+	call = afs_alloc_flat_call(net, &afs_RXVLGetEntryByName, reqsz, 384);
 	if (!call)
 		return -ENOMEM;
 
@@ -183,7 +184,8 @@ int afs_vl_get_entry_by_name(struct in_addr *addr,
 /*
  * dispatch a get volume entry by ID operation
  */
-int afs_vl_get_entry_by_id(struct in_addr *addr,
+int afs_vl_get_entry_by_id(struct afs_net *net,
+			   struct in_addr *addr,
 			   struct key *key,
 			   afs_volid_t volid,
 			   afs_voltype_t voltype,
@@ -195,7 +197,7 @@ int afs_vl_get_entry_by_id(struct in_addr *addr,
 
 	_enter("");
 
-	call = afs_alloc_flat_call(&afs_RXVLGetEntryById, 12, 384);
+	call = afs_alloc_flat_call(net, &afs_RXVLGetEntryById, 12, 384);
 	if (!call)
 		return -ENOMEM;
 

fs/afs/vlocation.c

@@ -16,20 +16,11 @@
 #include <linux/sched.h>
 #include "internal.h"
 
+struct workqueue_struct *afs_vlocation_update_worker;
+
 static unsigned afs_vlocation_timeout = 10;	/* volume location timeout in seconds */
 static unsigned afs_vlocation_update_timeout = 10 * 60;
 
-static void afs_vlocation_reaper(struct work_struct *);
-static void afs_vlocation_updater(struct work_struct *);
-
-static LIST_HEAD(afs_vlocation_updates);
-static LIST_HEAD(afs_vlocation_graveyard);
-static DEFINE_SPINLOCK(afs_vlocation_updates_lock);
-static DEFINE_SPINLOCK(afs_vlocation_graveyard_lock);
-static DECLARE_DELAYED_WORK(afs_vlocation_reap, afs_vlocation_reaper);
-static DECLARE_DELAYED_WORK(afs_vlocation_update, afs_vlocation_updater);
-static struct workqueue_struct *afs_vlocation_update_worker;
-
 /*
  * iterate through the VL servers in a cell until one of them admits knowing
  * about the volume in question
@@ -52,8 +43,8 @@ static int afs_vlocation_access_vl_by_name(struct afs_vlocation *vl,
 		_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, key, vl->vldb.name, vldb,
-					       false);
+		ret = afs_vl_get_entry_by_name(cell->net, &addr, key,
+					       vl->vldb.name, vldb, false);
 		switch (ret) {
 		case 0:
 			goto out;
@@ -110,8 +101,8 @@ static int afs_vlocation_access_vl_by_id(struct afs_vlocation *vl,
 		_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, key, volid, voltype, vldb,
-					     false);
+		ret = afs_vl_get_entry_by_id(cell->net, &addr, key, volid,
+					     voltype, vldb, false);
 		switch (ret) {
 		case 0:
 			goto out;
@@ -335,7 +326,8 @@ static int afs_vlocation_fill_in_record(struct afs_vlocation *vl,
 /*
  * queue a vlocation record for updates
  */
-static void afs_vlocation_queue_for_updates(struct afs_vlocation *vl)
+static void afs_vlocation_queue_for_updates(struct afs_net *net,
+					    struct afs_vlocation *vl)
 {
 	struct afs_vlocation *xvl;
 
@@ -343,25 +335,25 @@ static void afs_vlocation_queue_for_updates(struct afs_vlocation *vl)
 	vl->update_at = ktime_get_real_seconds() +
 			afs_vlocation_update_timeout;
 
-	spin_lock(&afs_vlocation_updates_lock);
+	spin_lock(&net->vl_updates_lock);
 
-	if (!list_empty(&afs_vlocation_updates)) {
+	if (!list_empty(&net->vl_updates)) {
 		/* ... but wait at least 1 second more than the newest record
 		 * already queued so that we don't spam the VL server suddenly
 		 * with lots of requests
 		 */
-		xvl = list_entry(afs_vlocation_updates.prev,
+		xvl = list_entry(net->vl_updates.prev,
 				 struct afs_vlocation, update);
 		if (vl->update_at <= xvl->update_at)
 			vl->update_at = xvl->update_at + 1;
-	} else {
+	} else if (net->live) {
 		queue_delayed_work(afs_vlocation_update_worker,
-				   &afs_vlocation_update,
+				   &net->vl_updater,
 				   afs_vlocation_update_timeout * HZ);
 	}
 
-	list_add_tail(&vl->update, &afs_vlocation_updates);
-	spin_unlock(&afs_vlocation_updates_lock);
+	list_add_tail(&vl->update, &net->vl_updates);
+	spin_unlock(&net->vl_updates_lock);
 }
 
 /*
@@ -371,7 +363,8 @@ static void afs_vlocation_queue_for_updates(struct afs_vlocation *vl)
  * - lookup in the local cache if not able to find on the VL server
  * - insert/update in the local cache if did get a VL response
  */
-struct afs_vlocation *afs_vlocation_lookup(struct afs_cell *cell,
+struct afs_vlocation *afs_vlocation_lookup(struct afs_net *net,
+					   struct afs_cell *cell,
 					   struct key *key,
 					   const char *name,
 					   size_t namesz)
@@ -427,7 +420,7 @@ fill_in_record:
 #endif
 
 	/* schedule for regular updates */
-	afs_vlocation_queue_for_updates(vl);
+	afs_vlocation_queue_for_updates(net, vl);
 	goto success;
 
 found_in_memory:
@@ -436,9 +429,9 @@ found_in_memory:
 	atomic_inc(&vl->usage);
 	spin_unlock(&cell->vl_lock);
 	if (!list_empty(&vl->grave)) {
-		spin_lock(&afs_vlocation_graveyard_lock);
+		spin_lock(&net->vl_graveyard_lock);
 		list_del_init(&vl->grave);
-		spin_unlock(&afs_vlocation_graveyard_lock);
+		spin_unlock(&net->vl_graveyard_lock);
 	}
 	up_write(&cell->vl_sem);
 
@@ -481,7 +474,7 @@ error_abandon:
 	wake_up(&vl->waitq);
 error:
 	ASSERT(vl != NULL);
-	afs_put_vlocation(vl);
+	afs_put_vlocation(net, vl);
 	_leave(" = %d", ret);
 	return ERR_PTR(ret);
 }
@@ -489,7 +482,7 @@ error:
 /*
  * finish using a volume location record
  */
-void afs_put_vlocation(struct afs_vlocation *vl)
+void afs_put_vlocation(struct afs_net *net, struct afs_vlocation *vl)
 {
 	if (!vl)
 		return;
@@ -503,22 +496,22 @@ void afs_put_vlocation(struct afs_vlocation *vl)
 		return;
 	}
 
-	spin_lock(&afs_vlocation_graveyard_lock);
+	spin_lock(&net->vl_graveyard_lock);
 	if (atomic_read(&vl->usage) == 0) {
 		_debug("buried");
-		list_move_tail(&vl->grave, &afs_vlocation_graveyard);
+		list_move_tail(&vl->grave, &net->vl_graveyard);
 		vl->time_of_death = ktime_get_real_seconds();
-		queue_delayed_work(afs_wq, &afs_vlocation_reap,
+		queue_delayed_work(afs_wq, &net->vl_reaper,
 				   afs_vlocation_timeout * HZ);
 
 		/* suspend updates on this record */
 		if (!list_empty(&vl->update)) {
-			spin_lock(&afs_vlocation_updates_lock);
+			spin_lock(&net->vl_updates_lock);
 			list_del_init(&vl->update);
-			spin_unlock(&afs_vlocation_updates_lock);
+			spin_unlock(&net->vl_updates_lock);
 		}
 	}
-	spin_unlock(&afs_vlocation_graveyard_lock);
+	spin_unlock(&net->vl_graveyard_lock);
 	_leave(" [killed?]");
 }
 
@@ -539,31 +532,34 @@ static void afs_vlocation_destroy(struct afs_vlocation *vl)
 /*
  * reap dead volume location records
  */
-static void afs_vlocation_reaper(struct work_struct *work)
+void afs_vlocation_reaper(struct work_struct *work)
 {
 	LIST_HEAD(corpses);
 	struct afs_vlocation *vl;
+	struct afs_net *net = container_of(work, struct afs_net, vl_reaper.work);
 	unsigned long delay, expiry;
 	time64_t now;
 
 	_enter("");
 
 	now = ktime_get_real_seconds();
-	spin_lock(&afs_vlocation_graveyard_lock);
+	spin_lock(&net->vl_graveyard_lock);
 
-	while (!list_empty(&afs_vlocation_graveyard)) {
-		vl = list_entry(afs_vlocation_graveyard.next,
+	while (!list_empty(&net->vl_graveyard)) {
+		vl = list_entry(net->vl_graveyard.next,
 				struct afs_vlocation, grave);
 
 		_debug("check %p", vl);
 
 		/* the queue is ordered most dead first */
-		expiry = vl->time_of_death + afs_vlocation_timeout;
-		if (expiry > now) {
-			delay = (expiry - now) * HZ;
-			_debug("delay %lu", delay);
-			mod_delayed_work(afs_wq, &afs_vlocation_reap, delay);
-			break;
+		if (net->live) {
+			expiry = vl->time_of_death + afs_vlocation_timeout;
+			if (expiry > now) {
+				delay = (expiry - now) * HZ;
+				_debug("delay %lu", delay);
+				mod_delayed_work(afs_wq, &net->vl_reaper, delay);
+				break;
+			}
 		}
 
 		spin_lock(&vl->cell->vl_lock);
@@ -578,7 +574,7 @@ static void afs_vlocation_reaper(struct work_struct *work)
 		spin_unlock(&vl->cell->vl_lock);
 	}
 
-	spin_unlock(&afs_vlocation_graveyard_lock);
+	spin_unlock(&net->vl_graveyard_lock);
 
 	/* now reap the corpses we've extracted */
 	while (!list_empty(&corpses)) {
@@ -590,57 +586,47 @@ static void afs_vlocation_reaper(struct work_struct *work)
 	_leave("");
 }
 
-/*
- * initialise the VL update process
- */
-int __init afs_vlocation_update_init(void)
-{
-	afs_vlocation_update_worker = alloc_workqueue("kafs_vlupdated",
-						      WQ_MEM_RECLAIM, 0);
-	return afs_vlocation_update_worker ? 0 : -ENOMEM;
-}
-
 /*
  * discard all the volume location records for rmmod
  */
-void afs_vlocation_purge(void)
+void __net_exit afs_vlocation_purge(struct afs_net *net)
 {
-	afs_vlocation_timeout = 0;
-
-	spin_lock(&afs_vlocation_updates_lock);
-	list_del_init(&afs_vlocation_updates);
-	spin_unlock(&afs_vlocation_updates_lock);
-	mod_delayed_work(afs_vlocation_update_worker, &afs_vlocation_update, 0);
-	destroy_workqueue(afs_vlocation_update_worker);
-
-	mod_delayed_work(afs_wq, &afs_vlocation_reap, 0);
+	spin_lock(&net->vl_updates_lock);
+	list_del_init(&net->vl_updates);
+	spin_unlock(&net->vl_updates_lock);
+	mod_delayed_work(afs_vlocation_update_worker, &net->vl_updater, 0);
+	mod_delayed_work(afs_wq, &net->vl_reaper, 0);
 }
 
 /*
  * update a volume location
  */
-static void afs_vlocation_updater(struct work_struct *work)
+void afs_vlocation_updater(struct work_struct *work)
 {
 	struct afs_cache_vlocation vldb;
 	struct afs_vlocation *vl, *xvl;
+	struct afs_net *net = container_of(work, struct afs_net, vl_updater.work);
 	time64_t now;
 	long timeout;
 	int ret;
 
+	if (!net->live)
+		return;
+
 	_enter("");
 
 	now = ktime_get_real_seconds();
 
 	/* find a record to update */
-	spin_lock(&afs_vlocation_updates_lock);
+	spin_lock(&net->vl_updates_lock);
 	for (;;) {
-		if (list_empty(&afs_vlocation_updates)) {
-			spin_unlock(&afs_vlocation_updates_lock);
+		if (list_empty(&net->vl_updates) || !net->live) {
+			spin_unlock(&net->vl_updates_lock);
 			_leave(" [nothing]");
 			return;
 		}
 
-		vl = list_entry(afs_vlocation_updates.next,
+		vl = list_entry(net->vl_updates.next,
 				struct afs_vlocation, update);
 		if (atomic_read(&vl->usage) > 0)
 			break;
@@ -650,15 +636,15 @@ static void afs_vlocation_updater(struct work_struct *work)
 	timeout = vl->update_at - now;
 	if (timeout > 0) {
 		queue_delayed_work(afs_vlocation_update_worker,
-				   &afs_vlocation_update, timeout * HZ);
-		spin_unlock(&afs_vlocation_updates_lock);
+				   &net->vl_updater, timeout * HZ);
+		spin_unlock(&net->vl_updates_lock);
 		_leave(" [nothing]");
 		return;
 	}
 
 	list_del_init(&vl->update);
 	atomic_inc(&vl->usage);
-	spin_unlock(&afs_vlocation_updates_lock);
+	spin_unlock(&net->vl_updates_lock);
 
 	/* we can now perform the update */
 	_debug("update %s", vl->vldb.name);
@@ -688,18 +674,18 @@ static void afs_vlocation_updater(struct work_struct *work)
 	vl->update_at = ktime_get_real_seconds() +
 			afs_vlocation_update_timeout;
 
-	spin_lock(&afs_vlocation_updates_lock);
+	spin_lock(&net->vl_updates_lock);
 
-	if (!list_empty(&afs_vlocation_updates)) {
+	if (!list_empty(&net->vl_updates)) {
 		/* next update in 10 minutes, but wait at least 1 second more
 		 * than the newest record already queued so that we don't spam
 		 * the VL server suddenly with lots of requests
 		 */
-		xvl = list_entry(afs_vlocation_updates.prev,
+		xvl = list_entry(net->vl_updates.prev,
 				 struct afs_vlocation, update);
 		if (vl->update_at <= xvl->update_at)
 			vl->update_at = xvl->update_at + 1;
-		xvl = list_entry(afs_vlocation_updates.next,
+		xvl = list_entry(net->vl_updates.next,
 				 struct afs_vlocation, update);
 		timeout = xvl->update_at - now;
 		if (timeout < 0)
@@ -710,11 +696,10 @@ static void afs_vlocation_updater(struct work_struct *work)
 
 	ASSERT(list_empty(&vl->update));
 
-	list_add_tail(&vl->update, &afs_vlocation_updates);
+	list_add_tail(&vl->update, &net->vl_updates);
 
 	_debug("timeout %ld", timeout);
-	queue_delayed_work(afs_vlocation_update_worker,
-			   &afs_vlocation_update, timeout * HZ);
-	spin_unlock(&afs_vlocation_updates_lock);
-	afs_put_vlocation(vl);
+	queue_delayed_work(afs_vlocation_update_worker, &net->vl_updater, timeout * HZ);
+	spin_unlock(&net->vl_updates_lock);
+	afs_put_vlocation(net, vl);
 }

fs/afs/volume.c

@@ -54,7 +54,7 @@ struct afs_volume *afs_volume_lookup(struct afs_mount_params *params)
 	       params->volnamesz, params->volnamesz, params->volname, params->rwpath);
 
 	/* lookup the volume location record */
-	vlocation = afs_vlocation_lookup(params->cell, params->key,
+	vlocation = afs_vlocation_lookup(params->net, params->cell, params->key,
 					 params->volname, params->volnamesz);
 	if (IS_ERR(vlocation)) {
 		ret = PTR_ERR(vlocation);
@@ -138,7 +138,7 @@ success:
 	_debug("kAFS selected %s volume %08x",
 	       afs_voltypes[volume->type], volume->vid);
 	up_write(&params->cell->vl_sem);
-	afs_put_vlocation(vlocation);
+	afs_put_vlocation(params->net, vlocation);
 	_leave(" = %p", volume);
 	return volume;
 
@@ -146,7 +146,7 @@ success:
 error_up:
 	up_write(&params->cell->vl_sem);
 error:
-	afs_put_vlocation(vlocation);
+	afs_put_vlocation(params->net, vlocation);
 	_leave(" = %d", ret);
 	return ERR_PTR(ret);
 
@@ -163,7 +163,7 @@ error_discard:
 /*
  * destroy a volume record
  */
-void afs_put_volume(struct afs_volume *volume)
+void afs_put_volume(struct afs_net *net, struct afs_volume *volume)
 {
 	struct afs_vlocation *vlocation;
 	int loop;
@@ -195,7 +195,7 @@ void afs_put_volume(struct afs_volume *volume)
 #ifdef CONFIG_AFS_FSCACHE
 	fscache_relinquish_cookie(volume->cache, 0);
 #endif
-	afs_put_vlocation(vlocation);
+	afs_put_vlocation(net, vlocation);
 
 	for (loop = volume->nservers - 1; loop >= 0; loop--)
 		afs_put_server(volume->servers[loop]);

include/uapi/linux/magic.h

@@ -47,6 +47,7 @@
 #define OPENPROM_SUPER_MAGIC	0x9fa1
 #define QNX4_SUPER_MAGIC	0x002f		/* qnx4 fs detection */
 #define QNX6_SUPER_MAGIC	0x68191122	/* qnx6 fs detection */
+#define AFS_FS_MAGIC		0x6B414653
 
 #define REISERFS_SUPER_MAGIC	0x52654973	/* used by gcc */
 					/* used by file system utilities that