Patch "nfs: make the rpc_stat per net namespace" has been added to the 5.4-stable tree

[Sasha Levin <sashal@xxxxxxxxxx>]

This is a note to let you know that I've just added the patch titled

    nfs: make the rpc_stat per net namespace

to the 5.4-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     nfs-make-the-rpc_stat-per-net-namespace.patch
and it can be found in the queue-5.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit 19fd9b51a1d242421d08d2798f3a321462f44a64
Author: Josef Bacik <josef@xxxxxxxxxxxxxx>
Date:   Thu Feb 15 14:57:32 2024 -0500

    nfs: make the rpc_stat per net namespace
    
    [ Upstream commit 1548036ef1204df65ca5a16e8b199c858cb80075 ]
    
    Now that we're exposing the rpc stats on a per-network namespace basis,
    move this struct into struct nfs_net and use that to make sure only the
    per-network namespace stats are exposed.
    
    Signed-off-by: Josef Bacik <josef@xxxxxxxxxxxxxx>
    Signed-off-by: Trond Myklebust <trond.myklebust@xxxxxxxxxxxxxxx>
    Stable-dep-of: 24457f1be29f ("nfs: Handle error of rpc_proc_register() in nfs_net_init().")
    Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>

diff --git a/fs/nfs/client.c b/fs/nfs/client.c
index 35abe63655a9d..323cef064f2a4 100644
--- a/fs/nfs/client.c
+++ b/fs/nfs/client.c
@@ -72,7 +72,6 @@ const struct rpc_program nfs_program = {
 	.number			= NFS_PROGRAM,
 	.nrvers			= ARRAY_SIZE(nfs_version),
 	.version		= nfs_version,
-	.stats			= &nfs_rpcstat,
 	.pipe_dir_name		= NFS_PIPE_DIRNAME,
 };
 
@@ -492,6 +491,7 @@ int nfs_create_rpc_client(struct nfs_client *clp,
 			  const struct nfs_client_initdata *cl_init,
 			  rpc_authflavor_t flavor)
 {
+	struct nfs_net		*nn = net_generic(clp->cl_net, nfs_net_id);
 	struct rpc_clnt		*clnt = NULL;
 	struct rpc_create_args args = {
 		.net		= clp->cl_net,
@@ -503,6 +503,7 @@ int nfs_create_rpc_client(struct nfs_client *clp,
 		.servername	= clp->cl_hostname,
 		.nodename	= cl_init->nodename,
 		.program	= &nfs_program,
+		.stats		= &nn->rpcstats,
 		.version	= clp->rpc_ops->version,
 		.authflavor	= flavor,
 		.cred		= cl_init->cred,
@@ -1077,6 +1078,8 @@ void nfs_clients_init(struct net *net)
 #endif
 	spin_lock_init(&nn->nfs_client_lock);
 	nn->boot_time = ktime_get_real();
+	memset(&nn->rpcstats, 0, sizeof(nn->rpcstats));
+	nn->rpcstats.program = &nfs_program;
 
 	nfs_netns_sysfs_setup(nn, net);
 }
diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c
index c154e7f98e6d8..96468ee4406fa 100644
--- a/fs/nfs/inode.c
+++ b/fs/nfs/inode.c
@@ -2178,8 +2178,10 @@ EXPORT_SYMBOL_GPL(nfs_net_id);
 
 static int nfs_net_init(struct net *net)
 {
+	struct nfs_net *nn = net_generic(net, nfs_net_id);
+
 	nfs_clients_init(net);
-	rpc_proc_register(net, &nfs_rpcstat);
+	rpc_proc_register(net, &nn->rpcstats);
 	return nfs_fs_proc_net_init(net);
 }
 
diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h
index fcd35c98a9377..fb28750da761f 100644
--- a/fs/nfs/internal.h
+++ b/fs/nfs/internal.h
@@ -405,8 +405,6 @@ struct dentry * nfs_xdev_mount_common(struct file_system_type *, int,
 void nfs_kill_super(struct super_block *);
 void nfs_fill_super(struct super_block *, struct nfs_mount_info *);
 
-extern struct rpc_stat nfs_rpcstat;
-
 extern int __init register_nfs_fs(void);
 extern void __exit unregister_nfs_fs(void);
 extern bool nfs_sb_active(struct super_block *sb);
diff --git a/fs/nfs/netns.h b/fs/nfs/netns.h
index c8374f74dce11..a68b21603ea9a 100644
--- a/fs/nfs/netns.h
+++ b/fs/nfs/netns.h
@@ -9,6 +9,7 @@
 #include <linux/nfs4.h>
 #include <net/net_namespace.h>
 #include <net/netns/generic.h>
+#include <linux/sunrpc/stats.h>
 
 struct bl_dev_msg {
 	int32_t status;
@@ -34,6 +35,7 @@ struct nfs_net {
 	struct nfs_netns_client *nfs_client;
 	spinlock_t nfs_client_lock;
 	ktime_t boot_time;
+	struct rpc_stat rpcstats;
 #ifdef CONFIG_PROC_FS
 	struct proc_dir_entry *proc_nfsfs;
 #endif