[PATCH 0/2] NFS v4.2 support to both the server and client (take 4)

[PATCH 0/2] NFS v4.2 support to both the server and client (take 4)

[Steve Dickson]

Changes:
  * fixed typo in Kconfig 
  * Reworked verbiage in Kconfig file
  * Merged cases in nfs_callback_up_net()
  * Created a new nfs4_minor_version_ops structure for minor version 2
  * Correctly initialized minor number in nfsd_exchange_id()
  * Correct a comment in the nfs4_cb_conn structure.

These patches add v4.2 support to both the server and client. 
The v4.1 code is reused to support this new version. Main reason
for this new version is to enable features like Label NFS.

Note, these patches apply on top of the lNFS: 3.8-rc3 release
patches. Although the only conflict, if applied without those 
patches, would be in the Kconfig files 

Steve Dickson (2):
  NFSv4.2: Added NFS v4.2 support to the NFS client
  NFSDv4.2: Added NFS v4.2 support to the NFS server

 fs/nfs/Kconfig       | 33 +++++++++++++++++++--------------
 fs/nfs/callback.c    |  1 +
 fs/nfs/nfs4client.c  |  5 +++++
 fs/nfs/nfs4proc.c    | 15 +++++++++++++++
 fs/nfs/super.c       |  7 ++++++-
 fs/nfsd/nfs4state.c  |  2 +-
 fs/nfsd/nfs4xdr.c    |  1 +
 fs/nfsd/nfsd.h       |  2 +-
 fs/nfsd/state.h      |  2 +-
 include/linux/nfs4.h |  4 ++++
 10 files changed, 54 insertions(+), 18 deletions(-)

-- 
1.8.1.2

[PATCH 1/2] NFSv4.2: Added NFS v4.2 support to the NFS client

[Steve Dickson]

This enable NFSv4.2 support. To enable this code the
CONFIG_NFS_V4_2 Kconfig define needs to be set and
the -o v4.2 mount option need to be used.

Signed-off-by: Steve Dickson <steved@redhat.com>
---
 fs/nfs/Kconfig       | 33 +++++++++++++++++++--------------
 fs/nfs/callback.c    |  1 +
 fs/nfs/nfs4client.c  |  5 +++++
 fs/nfs/nfs4proc.c    | 15 +++++++++++++++
 fs/nfs/super.c       |  7 ++++++-
 include/linux/nfs4.h |  4 ++++
 6 files changed, 50 insertions(+), 15 deletions(-)

diff --git a/fs/nfs/Kconfig b/fs/nfs/Kconfig
index 3861a1f..ec33289 100644
--- a/fs/nfs/Kconfig
+++ b/fs/nfs/Kconfig
@@ -104,6 +104,23 @@ config NFS_V4_1
 
 	  If unsure, say N.
 
+config NFS_V4_2
+	bool "NFS client support for NFSv4.2"
+	depends on NFS_V4_1
+	help
+	  This option enables support for minor version 2 of the NFSv4 protocol
+	  in the kernel's NFS client.
+
+	  Say Y here if you want enable fine-grained security label attribute
+	  support for NFS version 4.  Security labels allow security modules like
+	  SELinux and Smack to label files to facilitate enforcement of their policies.
+	  Without this an NFSv4 mount will have the same label on each file.
+
+	  WARNING: there is still a chance of backwards-incompatible protocol changes.  
+	  For now we recommend "Y" only for developers and testers."
+
+	  If unsure, say N.
+
 config PNFS_FILE_LAYOUT
 	tristate
 	depends on NFS_V4_1
@@ -133,21 +150,9 @@ config NFS_V4_1_IMPLEMENTATION_ID_DOMAIN
 
 config NFS_V4_SECURITY_LABEL
 	bool "Provide Security Label support for NFSv4 client"
-	depends on NFS_V4 && SECURITY
-	help
-
-	Say Y here if you want enable fine-grained security label attribute
-	support for NFS version 4.  Security labels allow security modules like
-	SELinux and Smack to label files to facilitate enforcement of their policies.
-	Without this an NFSv4 mount will have the same label on each file.
-
-	If you do not wish to enable fine-grained security labels SELinux or
-	Smack policies on NFSv4 files, say N.
-
-	WARNING: there is still a chance of backwards-incompatible protocol changes.  
-	For now we recommend "Y" only for developers and testers."
+	depends on NFS_V4_2 && SECURITY
+	default y
 
-	If unsure, say N.
 
 config ROOT_NFS
 	bool "Root file system on NFS"
diff --git a/fs/nfs/callback.c b/fs/nfs/callback.c
index 5088b57..cb35747 100644
--- a/fs/nfs/callback.c
+++ b/fs/nfs/callback.c
@@ -279,6 +279,7 @@ static int nfs_callback_up_net(int minorversion, struct svc_serv *serv, struct n
 			ret = nfs4_callback_up_net(serv, net);
 			break;
 		case 1:
+		case 2:
 			ret = nfs41_callback_up_net(serv, net);
 			break;
 		default:
diff --git a/fs/nfs/nfs4client.c b/fs/nfs/nfs4client.c
index 2e9779b..2987fd6 100644
--- a/fs/nfs/nfs4client.c
+++ b/fs/nfs/nfs4client.c
@@ -66,6 +66,11 @@ struct nfs_client *nfs4_alloc_client(const struct nfs_client_initdata *cl_init)
 	if (err)
 		goto error;
 
+	if (cl_init->minorversion > NFS4_MAX_MINOR_VERSION) {
+		err = -EINVAL;
+		goto error;
+	}
+		
 	spin_lock_init(&clp->cl_lock);
 	INIT_DELAYED_WORK(&clp->cl_renewd, nfs4_renew_state);
 	rpc_init_wait_queue(&clp->cl_rpcwaitq, "NFS client");
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 30b3e44..826c48d 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -7131,11 +7131,26 @@ static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
 };
 #endif
 
+#if defined(CONFIG_NFS_V4_2)
+static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
+	.minor_version = 2,
+	.call_sync = nfs4_call_sync_sequence,
+	.match_stateid = nfs41_match_stateid,
+	.find_root_sec = nfs41_find_root_sec,
+	.reboot_recovery_ops = &nfs41_reboot_recovery_ops,
+	.nograce_recovery_ops = &nfs41_nograce_recovery_ops,
+	.state_renewal_ops = &nfs41_state_renewal_ops,
+};
+#endif
+
 const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
 	[0] = &nfs_v4_0_minor_ops,
 #if defined(CONFIG_NFS_V4_1)
 	[1] = &nfs_v4_1_minor_ops,
 #endif
+#if defined(CONFIG_NFS_V4_2)
+	[2] = &nfs_v4_2_minor_ops,
+#endif
 };
 
 const struct inode_operations nfs4_dir_inode_operations = {
diff --git a/fs/nfs/super.c b/fs/nfs/super.c
index 4e78f93..d35582c 100644
--- a/fs/nfs/super.c
+++ b/fs/nfs/super.c
@@ -269,7 +269,7 @@ static match_table_t nfs_local_lock_tokens = {
 
 enum {
 	Opt_vers_2, Opt_vers_3, Opt_vers_4, Opt_vers_4_0,
-	Opt_vers_4_1,
+	Opt_vers_4_1, Opt_vers_4_2,
 
 	Opt_vers_err
 };
@@ -280,6 +280,7 @@ static match_table_t nfs_vers_tokens = {
 	{ Opt_vers_4, "4" },
 	{ Opt_vers_4_0, "4.0" },
 	{ Opt_vers_4_1, "4.1" },
+	{ Opt_vers_4_2, "4.2" },
 
 	{ Opt_vers_err, NULL }
 };
@@ -1143,6 +1144,10 @@ static int nfs_parse_version_string(char *string,
 		mnt->version = 4;
 		mnt->minorversion = 1;
 		break;
+	case Opt_vers_4_2:
+		mnt->version = 4;
+		mnt->minorversion = 2;
+		break;
 	default:
 		return 0;
 	}
diff --git a/include/linux/nfs4.h b/include/linux/nfs4.h
index aab8bd8..e9c040a 100644
--- a/include/linux/nfs4.h
+++ b/include/linux/nfs4.h
@@ -394,11 +394,15 @@ enum lock_type4 {
 #define NFS4_VERSION 4
 #define NFS4_MINOR_VERSION 0
 
+#if defined(CONFIG_NFS_V4_2)
+#define NFS4_MAX_MINOR_VERSION 2
+#else
 #if defined(CONFIG_NFS_V4_1)
 #define NFS4_MAX_MINOR_VERSION 1
 #else
 #define NFS4_MAX_MINOR_VERSION 0
 #endif /* CONFIG_NFS_V4_1 */
+#endif /* CONFIG_NFS_V4_2 */
 
 #define NFS4_DEBUG 1
 
-- 
1.8.1.2

[PATCH 2/2] NFSDv4.2: Added NFS v4.2 support to the NFS server

[Steve Dickson]

This enable NFSv4.2 support for the server. To enable this
code do the following:
  echo "+4.2" >/proc/fs/nfsd/versions

after the nfsd kernel module is loaded.

Signed-off-by: Steve Dickson <steved@redhat.com>
---
 fs/nfsd/nfs4state.c | 2 +-
 fs/nfsd/nfs4xdr.c   | 1 +
 fs/nfsd/nfsd.h      | 2 +-
 fs/nfsd/state.h     | 2 +-
 4 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index ac8ed96..947c550 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -1678,7 +1678,7 @@ out_new:
 		status = nfserr_jukebox;
 		goto out;
 	}
-	new->cl_minorversion = 1;
+	new->cl_minorversion = cstate->minorversion;
 
 	gen_clid(new, nn);
 	add_to_unconfirmed(new);
diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c
index d2ae8db..86be853 100644
--- a/fs/nfsd/nfs4xdr.c
+++ b/fs/nfsd/nfs4xdr.c
@@ -1621,6 +1621,7 @@ struct nfsd4_minorversion_ops {
 static struct nfsd4_minorversion_ops nfsd4_minorversion[] = {
 	[0] = { nfsd4_dec_ops, ARRAY_SIZE(nfsd4_dec_ops) },
 	[1] = { nfsd41_dec_ops, ARRAY_SIZE(nfsd41_dec_ops) },
+	[2] = { nfsd41_dec_ops, ARRAY_SIZE(nfsd41_dec_ops) },
 };
 
 static __be32
diff --git a/fs/nfsd/nfsd.h b/fs/nfsd/nfsd.h
index 26a457b..0e3ccd1 100644
--- a/fs/nfsd/nfsd.h
+++ b/fs/nfsd/nfsd.h
@@ -24,7 +24,7 @@
 /*
  * nfsd version
  */
-#define NFSD_SUPPORTED_MINOR_VERSION	1
+#define NFSD_SUPPORTED_MINOR_VERSION	2
 /*
  * Maximum blocksizes supported by daemon under various circumstances.
  */
diff --git a/fs/nfsd/state.h b/fs/nfsd/state.h
index d1c229f..de9416b 100644
--- a/fs/nfsd/state.h
+++ b/fs/nfsd/state.h
@@ -108,7 +108,7 @@ struct nfs4_cb_conn {
 	u32                     cb_prog; /* used only in 4.0 case;
 					    per-session otherwise */
 	u32                     cb_ident;	/* minorversion 0 only */
-	struct svc_xprt		*cb_xprt;	/* minorversion 1 only */
+	struct svc_xprt		*cb_xprt;	/* minorversion >= 1 only */
 };
 
 static inline struct nfs4_delegation *delegstateid(struct nfs4_stid *s)
-- 
1.8.1.2

Re: [PATCH 2/2] NFSDv4.2: Added NFS v4.2 support to the NFS server

[J. Bruce Fields]

On Fri, Feb 22, 2013 at 12:09:41PM -0500, Steve Dickson wrote:
> This enable NFSv4.2 support for the server. To enable this
> code do the following:
>   echo "+4.2" >/proc/fs/nfsd/versions

Give it a config option and we're set....

--b.

> 
> after the nfsd kernel module is loaded.
> 
> Signed-off-by: Steve Dickson <steved@redhat.com>
> ---
>  fs/nfsd/nfs4state.c | 2 +-
>  fs/nfsd/nfs4xdr.c   | 1 +
>  fs/nfsd/nfsd.h      | 2 +-
>  fs/nfsd/state.h     | 2 +-
>  4 files changed, 4 insertions(+), 3 deletions(-)
> 
> diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
> index ac8ed96..947c550 100644
> --- a/fs/nfsd/nfs4state.c
> +++ b/fs/nfsd/nfs4state.c
> @@ -1678,7 +1678,7 @@ out_new:
>  		status = nfserr_jukebox;
>  		goto out;
>  	}
> -	new->cl_minorversion = 1;
> +	new->cl_minorversion = cstate->minorversion;
>  
>  	gen_clid(new, nn);
>  	add_to_unconfirmed(new);
> diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c
> index d2ae8db..86be853 100644
> --- a/fs/nfsd/nfs4xdr.c
> +++ b/fs/nfsd/nfs4xdr.c
> @@ -1621,6 +1621,7 @@ struct nfsd4_minorversion_ops {
>  static struct nfsd4_minorversion_ops nfsd4_minorversion[] = {
>  	[0] = { nfsd4_dec_ops, ARRAY_SIZE(nfsd4_dec_ops) },
>  	[1] = { nfsd41_dec_ops, ARRAY_SIZE(nfsd41_dec_ops) },
> +	[2] = { nfsd41_dec_ops, ARRAY_SIZE(nfsd41_dec_ops) },
>  };
>  
>  static __be32
> diff --git a/fs/nfsd/nfsd.h b/fs/nfsd/nfsd.h
> index 26a457b..0e3ccd1 100644
> --- a/fs/nfsd/nfsd.h
> +++ b/fs/nfsd/nfsd.h
> @@ -24,7 +24,7 @@
>  /*
>   * nfsd version
>   */
> -#define NFSD_SUPPORTED_MINOR_VERSION	1
> +#define NFSD_SUPPORTED_MINOR_VERSION	2
>  /*
>   * Maximum blocksizes supported by daemon under various circumstances.
>   */
> diff --git a/fs/nfsd/state.h b/fs/nfsd/state.h
> index d1c229f..de9416b 100644
> --- a/fs/nfsd/state.h
> +++ b/fs/nfsd/state.h
> @@ -108,7 +108,7 @@ struct nfs4_cb_conn {
>  	u32                     cb_prog; /* used only in 4.0 case;
>  					    per-session otherwise */
>  	u32                     cb_ident;	/* minorversion 0 only */
> -	struct svc_xprt		*cb_xprt;	/* minorversion 1 only */
> +	struct svc_xprt		*cb_xprt;	/* minorversion >= 1 only */
>  };
>  
>  static inline struct nfs4_delegation *delegstateid(struct nfs4_stid *s)
> -- 
> 1.8.1.2
> 
> --
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Re: [PATCH 2/2] NFSDv4.2: Added NFS v4.2 support to the NFS server

[J. Bruce Fields]

On Fri, Feb 22, 2013 at 01:05:15PM -0500, J. Bruce Fields wrote:
> On Fri, Feb 22, 2013 at 12:09:41PM -0500, Steve Dickson wrote:
> > This enable NFSv4.2 support for the server. To enable this
> > code do the following:
> >   echo "+4.2" >/proc/fs/nfsd/versions
> 
> Give it a config option and we're set....

Also, while you're testing these: worth firing up wireshark and checking
that "2"'s actually being sent in minorversion field, both on ordinary
compounds and on callbacks.

--b.

Re: [PATCH 2/2] NFSDv4.2: Added NFS v4.2 support to the NFS server

[Steve Dickson]

On 22/02/13 13:05, J. Bruce Fields wrote:
> On Fri, Feb 22, 2013 at 12:09:41PM -0500, Steve Dickson wrote:
>> > This enable NFSv4.2 support for the server. To enable this
>> > code do the following:
>> >   echo "+4.2" >/proc/fs/nfsd/versions
> Give it a config option and we're set....
I didn't a config option in fs/nfsd/Kconfig for 4.1 which is 
the reason I didn't add one for 4.2... Should I add both?

steved.

Re: [PATCH 2/2] NFSDv4.2: Added NFS v4.2 support to the NFS server

[J. Bruce Fields]

On Sat, Feb 23, 2013 at 07:43:43AM -0500, Steve Dickson wrote:
> 
> 
> On 22/02/13 13:05, J. Bruce Fields wrote:
> > On Fri, Feb 22, 2013 at 12:09:41PM -0500, Steve Dickson wrote:
> >> > This enable NFSv4.2 support for the server. To enable this
> >> > code do the following:
> >> >   echo "+4.2" >/proc/fs/nfsd/versions
> > Give it a config option and we're set....
> I didn't a config option in fs/nfsd/Kconfig for 4.1 which is 
> the reason I didn't add one for 4.2... Should I add both?

Well.... I guess if it defaults to off at runtime, and if there's a
config option for labeled NFS--maybe there's no harm to it.  At worst
somebody turns on 4.2 by option but hey it should be fully
spec-compliant as 4.2 is only optional stuff.

--b.

Re: [PATCH 2/2] NFSDv4.2: Added NFS v4.2 support to the NFS server

[J. Bruce Fields]

On Sat, Feb 23, 2013 at 08:00:56AM -0500, J. Bruce Fields wrote:
> On Sat, Feb 23, 2013 at 07:43:43AM -0500, Steve Dickson wrote:
> > 
> > 
> > On 22/02/13 13:05, J. Bruce Fields wrote:
> > > On Fri, Feb 22, 2013 at 12:09:41PM -0500, Steve Dickson wrote:
> > >> > This enable NFSv4.2 support for the server. To enable this
> > >> > code do the following:
> > >> >   echo "+4.2" >/proc/fs/nfsd/versions
> > > Give it a config option and we're set....
> > I didn't a config option in fs/nfsd/Kconfig for 4.1 which is 
> > the reason I didn't add one for 4.2... Should I add both?
> 
> Well.... I guess if it defaults to off at runtime, and if there's a
> config option for labeled NFS--maybe there's no harm to it.  At worst
> somebody turns on 4.2 by option but hey it should be fully
> spec-compliant as 4.2 is only optional stuff.

(In other words: OK, OK, never mind, we can do without!)

--b.

Re: [PATCH 2/2] NFSDv4.2: Added NFS v4.2 support to the NFS server

[Steve Dickson]

On 22/02/13 13:10, J. Bruce Fields wrote:
> On Fri, Feb 22, 2013 at 01:05:15PM -0500, J. Bruce Fields wrote:
>> On Fri, Feb 22, 2013 at 12:09:41PM -0500, Steve Dickson wrote:
>>> This enable NFSv4.2 support for the server. To enable this
>>> code do the following:
>>>   echo "+4.2" >/proc/fs/nfsd/versions
>>
>> Give it a config option and we're set....
> 
> Also, while you're testing these: worth firing up wireshark and checking
> that "2"'s actually being sent in minorversion field, both on ordinary
> compounds and on callbacks.
I just confirmed with these latest bits, minorversion is definitely getting
set to "2".

steved.