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Date: Tue, 04 Dec 2012 14:29:27 +0300
From: Stanislav Kinsbursky <skinsbursky@...allels.com>
To: bfields@...ldses.org
Cc: linux-nfs@...r.kernel.org, Trond.Myklebust@...app.com,
linux-kernel@...r.kernel.org, devel@...nvz.org
Subject: [PATCH] nfsd: make NFSv4 recovery client tracking options per net
Pointer to client tracking operations - client_tracking_ops - have to be
containerized, because different environment can support different trackers
(for example, legacy tracker currently is not suported in container).
Signed-off-by: Stanislav Kinsbursky <skinsbursky@...allels.com>
---
fs/nfsd/netns.h | 2 ++
fs/nfsd/nfs4recover.c | 48 ++++++++++++++++++++++++++++--------------------
2 files changed, 30 insertions(+), 20 deletions(-)
diff --git a/fs/nfsd/netns.h b/fs/nfsd/netns.h
index 2c4b2e2..bca789d 100644
--- a/fs/nfsd/netns.h
+++ b/fs/nfsd/netns.h
@@ -35,6 +35,7 @@
#define SESSION_HASH_SIZE 512
struct cld_net;
+struct nfsd4_client_tracking_ops;
struct nfsd_net {
struct cld_net *cld_net;
@@ -87,6 +88,7 @@ struct nfsd_net {
struct file *rec_file;
bool in_grace;
+ struct nfsd4_client_tracking_ops *client_tracking_ops;
time_t nfsd4_lease;
time_t nfsd4_grace;
diff --git a/fs/nfsd/nfs4recover.c b/fs/nfsd/nfs4recover.c
index 359793f..ba6fdd4 100644
--- a/fs/nfsd/nfs4recover.c
+++ b/fs/nfsd/nfs4recover.c
@@ -63,7 +63,6 @@ struct nfsd4_client_tracking_ops {
/* Globals */
static char user_recovery_dirname[PATH_MAX] = "/var/lib/nfs/v4recovery";
-static struct nfsd4_client_tracking_ops *client_tracking_ops;
static int
nfs4_save_creds(const struct cred **original_creds)
@@ -1262,17 +1261,18 @@ nfsd4_client_tracking_init(struct net *net)
{
int status;
struct path path;
+ struct nfsd_net *nn = net_generic(net, nfsd_net_id);
/* just run the init if it the method is already decided */
- if (client_tracking_ops)
+ if (nn->client_tracking_ops)
goto do_init;
/*
* First, try a UMH upcall. It should succeed or fail quickly, so
* there's little harm in trying that first.
*/
- client_tracking_ops = &nfsd4_umh_tracking_ops;
- status = client_tracking_ops->init(net);
+ nn->client_tracking_ops = &nfsd4_umh_tracking_ops;
+ status = nn->client_tracking_ops->init(net);
if (!status)
return status;
@@ -1280,7 +1280,7 @@ nfsd4_client_tracking_init(struct net *net)
* See if the recoverydir exists and is a directory. If it is,
* then use the legacy ops.
*/
- client_tracking_ops = &nfsd4_legacy_tracking_ops;
+ nn->client_tracking_ops = &nfsd4_legacy_tracking_ops;
status = kern_path(nfs4_recoverydir(), LOOKUP_FOLLOW, &path);
if (!status) {
status = S_ISDIR(path.dentry->d_inode->i_mode);
@@ -1290,16 +1290,16 @@ nfsd4_client_tracking_init(struct net *net)
}
/* Finally, try to use nfsdcld */
- client_tracking_ops = &nfsd4_cld_tracking_ops;
+ nn->client_tracking_ops = &nfsd4_cld_tracking_ops;
printk(KERN_WARNING "NFSD: the nfsdcld client tracking upcall will be "
"removed in 3.10. Please transition to using "
"nfsdcltrack.\n");
do_init:
- status = client_tracking_ops->init(net);
+ status = nn->client_tracking_ops->init(net);
if (status) {
printk(KERN_WARNING "NFSD: Unable to initialize client "
"recovery tracking! (%d)\n", status);
- client_tracking_ops = NULL;
+ nn->client_tracking_ops = NULL;
}
return status;
}
@@ -1307,32 +1307,40 @@ do_init:
void
nfsd4_client_tracking_exit(struct net *net)
{
- if (client_tracking_ops) {
- if (client_tracking_ops->exit)
- client_tracking_ops->exit(net);
- client_tracking_ops = NULL;
+ struct nfsd_net *nn = net_generic(net, nfsd_net_id);
+
+ if (nn->client_tracking_ops) {
+ if (nn->client_tracking_ops->exit)
+ nn->client_tracking_ops->exit(net);
+ nn->client_tracking_ops = NULL;
}
}
void
nfsd4_client_record_create(struct nfs4_client *clp)
{
- if (client_tracking_ops)
- client_tracking_ops->create(clp);
+ struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
+
+ if (nn->client_tracking_ops)
+ nn->client_tracking_ops->create(clp);
}
void
nfsd4_client_record_remove(struct nfs4_client *clp)
{
- if (client_tracking_ops)
- client_tracking_ops->remove(clp);
+ struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
+
+ if (nn->client_tracking_ops)
+ nn->client_tracking_ops->remove(clp);
}
int
nfsd4_client_record_check(struct nfs4_client *clp)
{
- if (client_tracking_ops)
- return client_tracking_ops->check(clp);
+ struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
+
+ if (nn->client_tracking_ops)
+ return nn->client_tracking_ops->check(clp);
return -EOPNOTSUPP;
}
@@ -1340,8 +1348,8 @@ nfsd4_client_record_check(struct nfs4_client *clp)
void
nfsd4_record_grace_done(struct nfsd_net *nn, time_t boot_time)
{
- if (client_tracking_ops)
- client_tracking_ops->grace_done(nn, boot_time);
+ if (nn->client_tracking_ops)
+ nn->client_tracking_ops->grace_done(nn, boot_time);
}
static int
--
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