Currently, all of the grace period handling is part of lockd. Eventually
though we'd like to be able to build v4-only servers, at which point
we'll need to put all of this elsewhere.
Move the code itself into fs/nfs_common and have it build a grace.ko
module. Then, rejigger the Kconfig options so that both nfsd and lockd
enable it automatically.
Signed-off-by: Jeff Layton <jlayton@xxxxxxxxxxxxxxx>
---
fs/Kconfig | 6 +++-
fs/lockd/Makefile | 2 +-
fs/lockd/netns.h | 1 -
fs/lockd/svc.c | 1 -
fs/nfs_common/Makefile | 3 +-
fs/{lockd => nfs_common}/grace.c | 68 ++++++++++++++++++++++++++++++++++------
fs/nfsd/Kconfig | 1 +
include/linux/proc_fs.h | 2 ++
8 files changed, 69 insertions(+), 15 deletions(-)
rename fs/{lockd => nfs_common}/grace.c (50%)
diff --git a/fs/Kconfig b/fs/Kconfig
index 312393f32948..db5dc1598716 100644
--- a/fs/Kconfig
+++ b/fs/Kconfig
@@ -233,9 +233,13 @@ if NETWORK_FILESYSTEMS
source "fs/nfs/Kconfig"
source "fs/nfsd/Kconfig"
+config GRACE_PERIOD
+ tristate
+
config LOCKD
tristate
depends on FILE_LOCKING
+ select GRACE_PERIOD
config LOCKD_V4
bool
@@ -249,7 +253,7 @@ config NFS_ACL_SUPPORT
config NFS_COMMON
bool
- depends on NFSD || NFS_FS
+ depends on NFSD || NFS_FS || LOCKD
default y
source "net/sunrpc/Kconfig"
diff --git a/fs/lockd/Makefile b/fs/lockd/Makefile
index ca58d64374ca..6a0b351ce30e 100644
--- a/fs/lockd/Makefile
+++ b/fs/lockd/Makefile
@@ -5,6 +5,6 @@
obj-$(CONFIG_LOCKD) += lockd.o
lockd-objs-y := clntlock.o clntproc.o clntxdr.o host.o svc.o svclock.o \
- svcshare.o svcproc.o svcsubs.o mon.o xdr.o grace.o
+ svcshare.o svcproc.o svcsubs.o mon.o xdr.o
lockd-objs-$(CONFIG_LOCKD_V4) += clnt4xdr.o xdr4.o svc4proc.o
lockd-objs := $(lockd-objs-y)
diff --git a/fs/lockd/netns.h b/fs/lockd/netns.h
index 5010b55628b4..097bfa3adb1c 100644
--- a/fs/lockd/netns.h
+++ b/fs/lockd/netns.h
@@ -11,7 +11,6 @@ struct lockd_net {
struct delayed_work grace_period_end;
struct lock_manager lockd_manager;
- struct list_head grace_list;
spinlock_t nsm_clnt_lock;
unsigned int nsm_users;
diff --git a/fs/lockd/svc.c b/fs/lockd/svc.c
index 8f27c93f8d2e..3599c9ca28ae 100644
--- a/fs/lockd/svc.c
+++ b/fs/lockd/svc.c
@@ -583,7 +583,6 @@ static int lockd_init_net(struct net *net)
struct lockd_net *ln = net_generic(net, lockd_net_id);
INIT_DELAYED_WORK(&ln->grace_period_end, grace_ender);
- INIT_LIST_HEAD(&ln->grace_list);
spin_lock_init(&ln->nsm_clnt_lock);
return 0;
}
diff --git a/fs/nfs_common/Makefile b/fs/nfs_common/Makefile
index f689ed82af3a..d153ca3ea577 100644
--- a/fs/nfs_common/Makefile
+++ b/fs/nfs_common/Makefile
@@ -3,5 +3,6 @@
#
obj-$(CONFIG_NFS_ACL_SUPPORT) += nfs_acl.o
-
nfs_acl-objs := nfsacl.o
+
+obj-$(CONFIG_GRACE_PERIOD) += grace.o
diff --git a/fs/lockd/grace.c b/fs/nfs_common/grace.c
similarity index 50%
rename from fs/lockd/grace.c
rename to fs/nfs_common/grace.c
index 6d1ee7204c88..ae6e58ea4de5 100644
--- a/fs/lockd/grace.c
+++ b/fs/nfs_common/grace.c
@@ -1,17 +1,20 @@
/*
* Common code for control of lockd and nfsv4 grace periods.
+ *
+ * Transplanted from lockd code
*/
#include <linux/module.h>
-#include <linux/lockd/bind.h>
#include <net/net_namespace.h>
+#include <net/netns/generic.h>
+#include <linux/fs.h>
-#include "netns.h"
-
+static int grace_net_id;
static DEFINE_SPINLOCK(grace_lock);
/**
* locks_start_grace
+ * @net: net namespace that this lock manager belongs to
* @lm: who this grace period is for
*
* A grace period is a period during which locks should not be given
@@ -21,18 +24,20 @@ static DEFINE_SPINLOCK(grace_lock);
*
* This function is called to start a grace period.
*/
-void locks_start_grace(struct net *net, struct lock_manager *lm)
+void
+locks_start_grace(struct net *net, struct lock_manager *lm)
{
- struct lockd_net *ln = net_generic(net, lockd_net_id);
+ struct list_head *grace_list = net_generic(net, grace_net_id);
spin_lock(&grace_lock);
- list_add(&lm->list, &ln->grace_list);
+ list_add(&lm->list, grace_list);
spin_unlock(&grace_lock);
}
EXPORT_SYMBOL_GPL(locks_start_grace);
/**
* locks_end_grace
+ * @net: net namespace that this lock manager belongs to
* @lm: who this grace period is for
*
* Call this function to state that the given lock manager is ready to
@@ -41,7 +46,8 @@ EXPORT_SYMBOL_GPL(locks_start_grace);
* Note that callers count on it being safe to call this more than once,
* and the second call should be a no-op.
*/
-void locks_end_grace(struct lock_manager *lm)
+void
+locks_end_grace(struct lock_manager *lm)
{
spin_lock(&grace_lock);
list_del_init(&lm->list);
@@ -56,10 +62,52 @@ EXPORT_SYMBOL_GPL(locks_end_grace);
* to answer ordinary lock requests, and when they should accept only
* lock reclaims.
*/
-int locks_in_grace(struct net *net)
+int
+locks_in_grace(struct net *net)
{
- struct lockd_net *ln = net_generic(net, lockd_net_id);
+ struct list_head *grace_list = net_generic(net, grace_net_id);
- return !list_empty(&ln->grace_list);
+ return !list_empty(grace_list);
}
EXPORT_SYMBOL_GPL(locks_in_grace);
+
+static int __net_init
+grace_init_net(struct net *net)
+{
+ struct list_head *grace_list = net_generic(net, grace_net_id);
+
+ INIT_LIST_HEAD(grace_list);
+ return 0;
+}
+
+static void __net_exit
+grace_exit_net(struct net *net)
+{
+ struct list_head *grace_list = net_generic(net, grace_net_id);
+
+ BUG_ON(!list_empty(grace_list));
+}
+
+static struct pernet_operations grace_net_ops = {
+ .init = grace_init_net,
+ .exit = grace_exit_net,
+ .id = &grace_net_id,
+ .size = sizeof(struct list_head),
+};
+
+static int __init
+init_grace(void)
+{
+ return register_pernet_subsys(&grace_net_ops);
+}
+
+static void __exit
+exit_grace(void)
+{
+ unregister_pernet_subsys(&grace_net_ops);
+}
+
+MODULE_AUTHOR("Jeff Layton <jlayton@xxxxxxxxxxxxxxx>");
+MODULE_LICENSE("GPL");
+module_init(init_grace)
+module_exit(exit_grace)
diff --git a/fs/nfsd/Kconfig b/fs/nfsd/Kconfig
index f994e750e0d1..4fa98764de21 100644
--- a/fs/nfsd/Kconfig
+++ b/fs/nfsd/Kconfig
@@ -71,6 +71,7 @@ config NFSD_V4
select FS_POSIX_ACL
select SUNRPC_GSS
select CRYPTO
+ select GRACE_PERIOD
help
This option enables support in your system's NFS server for
version 4 of the NFS protocol (RFC 3530).
diff --git a/include/linux/proc_fs.h b/include/linux/proc_fs.h
index 9d117f61d976..b97bf2ef996e 100644
--- a/include/linux/proc_fs.h
+++ b/include/linux/proc_fs.h
@@ -74,6 +74,8 @@ static inline int remove_proc_subtree(const char *name, struct proc_dir_entry *p
#endif /* CONFIG_PROC_FS */
+struct net;
+
static inline struct proc_dir_entry *proc_net_mkdir(
struct net *net, const char *name, struct proc_dir_entry *parent)
{
--
1.9.3
--
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