Merge tag 'nfs-for-6.5-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfs

Pull NFS client updates from Trond Myklebust:
"Stable fixes and other bugfixes:

   - nfs: don't report STATX_BTIME in ->getattr

   - Revert 'NFSv4: Retry LOCK on OLD_STATEID during delegation return'
     since it breaks NFSv4 state recovery.

   - NFSv4.1: freeze the session table upon receiving NFS4ERR_BADSESSION

   - Fix the NFSv4.2 xattr cache shrinker_id

   - Force a ctime update after a NFSv4.2 SETXATTR call

  Features and cleanups:

   - NFS and RPC over TLS client code from Chuck Lever

   - Support for use of abstract unix socket addresses with the rpcbind
     daemon

   - Sysfs API to allow shutdown of the kernel RPC client and prevent
     umount() hangs if the server is known to be permanently down

   - XDR cleanups from Anna"

* tag 'nfs-for-6.5-1' of git://git.linux-nfs.org/projects/trondmy/linux-nfs: (33 commits)
  Revert "NFSv4: Retry LOCK on OLD_STATEID during delegation return"
  NFS: Don't cleanup sysfs superblock entry if uninitialized
  nfs: don't report STATX_BTIME in ->getattr
  NFSv4.1: freeze the session table upon receiving NFS4ERR_BADSESSION
  NFSv4.2: fix wrong shrinker_id
  NFSv4: Clean up some shutdown loops
  NFS: Cancel all existing RPC tasks when shutdown
  NFS: add sysfs shutdown knob
  NFS: add a sysfs link to the acl rpc_client
  NFS: add a sysfs link to the lockd rpc_client
  NFS: Add sysfs links to sunrpc clients for nfs_clients
  NFS: add superblock sysfs entries
  NFS: Make all of /sys/fs/nfs network-namespace unique
  NFS: Open-code the nfs_kset kset_create_and_add()
  NFS: rename nfs_client_kobj to nfs_net_kobj
  NFS: rename nfs_client_kset to nfs_kset
  NFS: Add an "xprtsec=" NFS mount option
  NFS: Have struct nfs_client carry a TLS policy field
  SUNRPC: Add a TCP-with-TLS RPC transport class
  SUNRPC: Capture CMSG metadata on client-side receive
  ...

1 files changed, 31 insertions, 8 deletions

diff --git a/net/sunrpc/rpcb_clnt.c b/net/sunrpc/rpcb_clnt.c
index 5a8e6d46809a..5988a5c5ff3f 100644
--- a/net/sunrpc/rpcb_clnt.c
+++ b/net/sunrpc/rpcb_clnt.c
@@ -36,6 +36,7 @@
 #include "netns.h"
 
 #define RPCBIND_SOCK_PATHNAME	"/var/run/rpcbind.sock"
+#define RPCBIND_SOCK_ABSTRACT_NAME "\0/run/rpcbind.sock"
 
 #define RPCBIND_PROGRAM		(100000u)
 #define RPCBIND_PORT		(111u)
@@ -216,21 +217,22 @@ static void rpcb_set_local(struct net *net, struct rpc_clnt *clnt,
 	sn->rpcb_users = 1;
 }
 
+/* Evaluate to actual length of the `sockaddr_un' structure.  */
+# define SUN_LEN(ptr) (offsetof(struct sockaddr_un, sun_path)		\
+		      + 1 + strlen((ptr)->sun_path + 1))
+
 /*
  * Returns zero on success, otherwise a negative errno value
  * is returned.
  */
-static int rpcb_create_local_unix(struct net *net)
+static int rpcb_create_af_local(struct net *net,
+				const struct sockaddr_un *addr)
 {
-	static const struct sockaddr_un rpcb_localaddr_rpcbind = {
-		.sun_family		= AF_LOCAL,
-		.sun_path		= RPCBIND_SOCK_PATHNAME,
-	};
 	struct rpc_create_args args = {
 		.net		= net,
 		.protocol	= XPRT_TRANSPORT_LOCAL,
-		.address	= (struct sockaddr *)&rpcb_localaddr_rpcbind,
-		.addrsize	= sizeof(rpcb_localaddr_rpcbind),
+		.address	= (struct sockaddr *)addr,
+		.addrsize	= SUN_LEN(addr),
 		.servername	= "localhost",
 		.program	= &rpcb_program,
 		.version	= RPCBVERS_2,
@@ -269,6 +271,26 @@ out:
 	return result;
 }
 
+static int rpcb_create_local_abstract(struct net *net)
+{
+	static const struct sockaddr_un rpcb_localaddr_abstract = {
+		.sun_family		= AF_LOCAL,
+		.sun_path		= RPCBIND_SOCK_ABSTRACT_NAME,
+	};
+
+	return rpcb_create_af_local(net, &rpcb_localaddr_abstract);
+}
+
+static int rpcb_create_local_unix(struct net *net)
+{
+	static const struct sockaddr_un rpcb_localaddr_unix = {
+		.sun_family		= AF_LOCAL,
+		.sun_path		= RPCBIND_SOCK_PATHNAME,
+	};
+
+	return rpcb_create_af_local(net, &rpcb_localaddr_unix);
+}
+
 /*
  * Returns zero on success, otherwise a negative errno value
  * is returned.
@@ -332,7 +354,8 @@ int rpcb_create_local(struct net *net)
 	if (rpcb_get_local(net))
 		goto out;
 
-	if (rpcb_create_local_unix(net) != 0)
+	if (rpcb_create_local_abstract(net) != 0 &&
+	    rpcb_create_local_unix(net) != 0)
 		result = rpcb_create_local_net(net);
 
 out: