[PATCH] dlm, sctp: Do not allocate a fd for peeloff

[PATCH] dlm, sctp: Do not allocate a fd for peeloff

[Benjamin Poirier]

avoids allocating a fd that a) propagates to every kernel thread and
usermodehelper b) is not properly released.

References: http://article.gmane.org/gmane.linux.network.drbd/22529
Signed-off-by: Benjamin Poirier <bpoirier@suse.de>
---
 fs/dlm/lowcomms.c       |   28 ++++++++++++++--------------
 include/net/sctp/sctp.h |    1 +
 net/sctp/socket.c       |    5 +++--
 3 files changed, 18 insertions(+), 16 deletions(-)

diff --git a/fs/dlm/lowcomms.c b/fs/dlm/lowcomms.c
index 0b3109e..f6645b2 100644
--- a/fs/dlm/lowcomms.c
+++ b/fs/dlm/lowcomms.c
@@ -52,6 +52,7 @@
 #include <linux/mutex.h>
 #include <linux/sctp.h>
 #include <linux/slab.h>
+#include <net/sctp/sctp.h>
 #include <net/sctp/user.h>
 #include <net/ipv6.h>
 
@@ -474,9 +475,8 @@ static void process_sctp_notification(struct connection *con,
 			int prim_len, ret;
 			int addr_len;
 			struct connection *new_con;
-			sctp_peeloff_arg_t parg;
-			int parglen = sizeof(parg);
-			int err;
+			sctp_assoc_t associd;
+			struct sctp_association *asoc;
 
 			/*
 			 * We get this before any data for an association.
@@ -525,23 +525,23 @@ static void process_sctp_notification(struct connection *con,
 				return;
 
 			/* Peel off a new sock */
-			parg.associd = sn->sn_assoc_change.sac_assoc_id;
-			ret = kernel_getsockopt(con->sock, IPPROTO_SCTP,
-						SCTP_SOCKOPT_PEELOFF,
-						(void *)&parg, &parglen);
+			sctp_lock_sock(con->sock->sk);
+			associd = sn->sn_assoc_change.sac_assoc_id;
+			asoc = sctp_id2assoc(con->sock->sk, associd);
+			if (!asoc) {
+				log_print("sctp_id2assoc error");
+				sctp_release_sock(con->sock->sk);
+				return;
+			}
+			ret = sctp_do_peeloff(asoc, &new_con->sock);
+			sctp_release_sock(con->sock->sk);
 			if (ret < 0) {
 				log_print("Can't peel off a socket for "
 					  "connection %d to node %d: err=%d",
-					  parg.associd, nodeid, ret);
-				return;
-			}
-			new_con->sock = sockfd_lookup(parg.sd, &err);
-			if (!new_con->sock) {
-				log_print("sockfd_lookup error %d", err);
+					  associd, nodeid, ret);
 				return;
 			}
 			add_sock(new_con->sock, new_con);
-			sockfd_put(new_con->sock);
 
 			log_print("connecting to %d sctp association %d",
 				 nodeid, (int)sn->sn_assoc_change.sac_assoc_id);
diff --git a/include/net/sctp/sctp.h b/include/net/sctp/sctp.h
index d368561..31e36db 100644
--- a/include/net/sctp/sctp.h
+++ b/include/net/sctp/sctp.h
@@ -413,6 +413,7 @@ static inline sctp_assoc_t sctp_assoc2id(const struct sctp_association *asoc)
 /* Look up the association by its id.  */
 struct sctp_association *sctp_id2assoc(struct sock *sk, sctp_assoc_t id);
 
+int sctp_do_peeloff(struct sctp_association *asoc, struct socket **sockp);
 
 /* A macro to walk a list of skbs.  */
 #define sctp_skb_for_each(pos, head, tmp) \
diff --git a/net/sctp/socket.c b/net/sctp/socket.c
index 408ebd0..ae8944c 100644
--- a/net/sctp/socket.c
+++ b/net/sctp/socket.c
@@ -239,6 +239,7 @@ struct sctp_association *sctp_id2assoc(struct sock *sk, sctp_assoc_t id)
 
 	return asoc;
 }
+EXPORT_SYMBOL(sctp_id2assoc);
 
 /* Look up the transport from an address and an assoc id. If both address and
  * id are specified, the associations matching the address and the id should be
@@ -4170,8 +4171,7 @@ static int sctp_getsockopt_autoclose(struct sock *sk, int len, char __user *optv
 }
 
 /* Helper routine to branch off an association to a new socket.  */
-SCTP_STATIC int sctp_do_peeloff(struct sctp_association *asoc,
-				struct socket **sockp)
+int sctp_do_peeloff(struct sctp_association *asoc, struct socket **sockp)
 {
 	struct sock *sk = asoc->base.sk;
 	struct socket *sock;
@@ -4206,6 +4206,7 @@ SCTP_STATIC int sctp_do_peeloff(struct sctp_association *asoc,
 
 	return err;
 }
+EXPORT_SYMBOL(sctp_do_peeloff);
 
 static int sctp_getsockopt_peeloff(struct sock *sk, int len, char __user *optval, int __user *optlen)
 {
-- 
1.7.7

Re: [PATCH] dlm, sctp: Do not allocate a fd for peeloff

[Vladislav Yasevich]

On 03/07/2012 10:41 AM, Benjamin Poirier wrote:
> avoids allocating a fd that a) propagates to every kernel thread and
> usermodehelper b) is not properly released.
> 
> References: http://article.gmane.org/gmane.linux.network.drbd/22529
> Signed-off-by: Benjamin Poirier <bpoirier@suse.de>

It might make sense to change sctp_do_peeloff to take the association id as
the first argument and not do the mapping from id to association yourself.
It's a bit ugly to expose internal sctp structures outside of SCTP.

-vlad

> ---
>  fs/dlm/lowcomms.c       |   28 ++++++++++++++--------------
>  include/net/sctp/sctp.h |    1 +
>  net/sctp/socket.c       |    5 +++--
>  3 files changed, 18 insertions(+), 16 deletions(-)
> 
> diff --git a/fs/dlm/lowcomms.c b/fs/dlm/lowcomms.c
> index 0b3109e..f6645b2 100644
> --- a/fs/dlm/lowcomms.c
> +++ b/fs/dlm/lowcomms.c
> @@ -52,6 +52,7 @@
>  #include <linux/mutex.h>
>  #include <linux/sctp.h>
>  #include <linux/slab.h>
> +#include <net/sctp/sctp.h>
>  #include <net/sctp/user.h>
>  #include <net/ipv6.h>
>  
> @@ -474,9 +475,8 @@ static void process_sctp_notification(struct connection *con,
>  			int prim_len, ret;
>  			int addr_len;
>  			struct connection *new_con;
> -			sctp_peeloff_arg_t parg;
> -			int parglen = sizeof(parg);
> -			int err;
> +			sctp_assoc_t associd;
> +			struct sctp_association *asoc;
>  
>  			/*
>  			 * We get this before any data for an association.
> @@ -525,23 +525,23 @@ static void process_sctp_notification(struct connection *con,
>  				return;
>  
>  			/* Peel off a new sock */
> -			parg.associd = sn->sn_assoc_change.sac_assoc_id;
> -			ret = kernel_getsockopt(con->sock, IPPROTO_SCTP,
> -						SCTP_SOCKOPT_PEELOFF,
> -						(void *)&parg, &parglen);
> +			sctp_lock_sock(con->sock->sk);
> +			associd = sn->sn_assoc_change.sac_assoc_id;
> +			asoc = sctp_id2assoc(con->sock->sk, associd);
> +			if (!asoc) {
> +				log_print("sctp_id2assoc error");
> +				sctp_release_sock(con->sock->sk);
> +				return;
> +			}
> +			ret = sctp_do_peeloff(asoc, &new_con->sock);
> +			sctp_release_sock(con->sock->sk);
>  			if (ret < 0) {
>  				log_print("Can't peel off a socket for "
>  					  "connection %d to node %d: err=%d",
> -					  parg.associd, nodeid, ret);
> -				return;
> -			}
> -			new_con->sock = sockfd_lookup(parg.sd, &err);
> -			if (!new_con->sock) {
> -				log_print("sockfd_lookup error %d", err);
> +					  associd, nodeid, ret);
>  				return;
>  			}
>  			add_sock(new_con->sock, new_con);
> -			sockfd_put(new_con->sock);
>  
>  			log_print("connecting to %d sctp association %d",
>  				 nodeid, (int)sn->sn_assoc_change.sac_assoc_id);
> diff --git a/include/net/sctp/sctp.h b/include/net/sctp/sctp.h
> index d368561..31e36db 100644
> --- a/include/net/sctp/sctp.h
> +++ b/include/net/sctp/sctp.h
> @@ -413,6 +413,7 @@ static inline sctp_assoc_t sctp_assoc2id(const struct sctp_association *asoc)
>  /* Look up the association by its id.  */
>  struct sctp_association *sctp_id2assoc(struct sock *sk, sctp_assoc_t id);
>  
> +int sctp_do_peeloff(struct sctp_association *asoc, struct socket **sockp);
>  
>  /* A macro to walk a list of skbs.  */
>  #define sctp_skb_for_each(pos, head, tmp) \
> diff --git a/net/sctp/socket.c b/net/sctp/socket.c
> index 408ebd0..ae8944c 100644
> --- a/net/sctp/socket.c
> +++ b/net/sctp/socket.c
> @@ -239,6 +239,7 @@ struct sctp_association *sctp_id2assoc(struct sock *sk, sctp_assoc_t id)
>  
>  	return asoc;
>  }
> +EXPORT_SYMBOL(sctp_id2assoc);
>  
>  /* Look up the transport from an address and an assoc id. If both address and
>   * id are specified, the associations matching the address and the id should be
> @@ -4170,8 +4171,7 @@ static int sctp_getsockopt_autoclose(struct sock *sk, int len, char __user *optv
>  }
>  
>  /* Helper routine to branch off an association to a new socket.  */
> -SCTP_STATIC int sctp_do_peeloff(struct sctp_association *asoc,
> -				struct socket **sockp)
> +int sctp_do_peeloff(struct sctp_association *asoc, struct socket **sockp)
>  {
>  	struct sock *sk = asoc->base.sk;
>  	struct socket *sock;
> @@ -4206,6 +4206,7 @@ SCTP_STATIC int sctp_do_peeloff(struct sctp_association *asoc,
>  
>  	return err;
>  }
> +EXPORT_SYMBOL(sctp_do_peeloff);
>  
>  static int sctp_getsockopt_peeloff(struct sock *sk, int len, char __user *optval, int __user *optlen)
>  {

Re: [PATCH] dlm, sctp: Do not allocate a fd for peeloff

[David Miller]

From: Vladislav Yasevich <vladislav.yasevich@hp.com>
Date: Wed, 07 Mar 2012 11:29:20 -0500

> On 03/07/2012 10:41 AM, Benjamin Poirier wrote:
>> avoids allocating a fd that a) propagates to every kernel thread and
>> usermodehelper b) is not properly released.
>> 
>> References: http://article.gmane.org/gmane.linux.network.drbd/22529
>> Signed-off-by: Benjamin Poirier <bpoirier@suse.de>
> 
> It might make sense to change sctp_do_peeloff to take the association id as
> the first argument and not do the mapping from id to association yourself.
> It's a bit ugly to expose internal sctp structures outside of SCTP.

Agreed.

[PATCH v2 1/2] sctp: Export sctp_do_peeloff

[Benjamin Poirier]

lookup sctp_association within sctp_do_peeloff() to enable its use outside of
the sctp code with minimal knowledge of the former.

Signed-off-by: Benjamin Poirier <bpoirier@suse.de>

---
Changes from v1:
* make sctp_do_peeloff() take the assoc id as argument so that the dlm code
  doesn't need to do the id to struct lookup itself
* split those sctp changes to their own patch

 include/net/sctp/sctp.h |    1 +
 net/sctp/socket.c       |   24 +++++++++---------------
 2 files changed, 10 insertions(+), 15 deletions(-)

diff --git a/include/net/sctp/sctp.h b/include/net/sctp/sctp.h
index d368561..6ee44b2 100644
--- a/include/net/sctp/sctp.h
+++ b/include/net/sctp/sctp.h
@@ -413,6 +413,7 @@ static inline sctp_assoc_t sctp_assoc2id(const struct sctp_association *asoc)
 /* Look up the association by its id.  */
 struct sctp_association *sctp_id2assoc(struct sock *sk, sctp_assoc_t id);
 
+int sctp_do_peeloff(struct sock *sk, sctp_assoc_t id, struct socket **sockp);
 
 /* A macro to walk a list of skbs.  */
 #define sctp_skb_for_each(pos, head, tmp) \
diff --git a/net/sctp/socket.c b/net/sctp/socket.c
index 408ebd0..06b42b7 100644
--- a/net/sctp/socket.c
+++ b/net/sctp/socket.c
@@ -4170,14 +4170,16 @@ static int sctp_getsockopt_autoclose(struct sock *sk, int len, char __user *optv
 }
 
 /* Helper routine to branch off an association to a new socket.  */
-SCTP_STATIC int sctp_do_peeloff(struct sctp_association *asoc,
-				struct socket **sockp)
+int sctp_do_peeloff(struct sock *sk, sctp_assoc_t id, struct socket **sockp)
 {
-	struct sock *sk = asoc->base.sk;
+	struct sctp_association *asoc = sctp_id2assoc(sk, id);
 	struct socket *sock;
 	struct sctp_af *af;
 	int err = 0;
 
+	if (!asoc)
+		return -EINVAL;
+
 	/* An association cannot be branched off from an already peeled-off
 	 * socket, nor is this supported for tcp style sockets.
 	 */
@@ -4206,13 +4208,13 @@ SCTP_STATIC int sctp_do_peeloff(struct sctp_association *asoc,
 
 	return err;
 }
+EXPORT_SYMBOL(sctp_do_peeloff);
 
 static int sctp_getsockopt_peeloff(struct sock *sk, int len, char __user *optval, int __user *optlen)
 {
 	sctp_peeloff_arg_t peeloff;
 	struct socket *newsock;
 	int retval = 0;
-	struct sctp_association *asoc;
 
 	if (len < sizeof(sctp_peeloff_arg_t))
 		return -EINVAL;
@@ -4220,15 +4222,7 @@ static int sctp_getsockopt_peeloff(struct sock *sk, int len, char __user *optval
 	if (copy_from_user(&peeloff, optval, len))
 		return -EFAULT;
 
-	asoc = sctp_id2assoc(sk, peeloff.associd);
-	if (!asoc) {
-		retval = -EINVAL;
-		goto out;
-	}
-
-	SCTP_DEBUG_PRINTK("%s: sk: %p asoc: %p\n", __func__, sk, asoc);
-
-	retval = sctp_do_peeloff(asoc, &newsock);
+	retval = sctp_do_peeloff(sk, peeloff.associd, &newsock);
 	if (retval < 0)
 		goto out;
 
@@ -4239,8 +4233,8 @@ static int sctp_getsockopt_peeloff(struct sock *sk, int len, char __user *optval
 		goto out;
 	}
 
-	SCTP_DEBUG_PRINTK("%s: sk: %p asoc: %p newsk: %p sd: %d\n",
-			  __func__, sk, asoc, newsock->sk, retval);
+	SCTP_DEBUG_PRINTK("%s: sk: %p newsk: %p sd: %d\n",
+			  __func__, sk, newsock->sk, retval);
 
 	/* Return the fd mapped to the new socket.  */
 	peeloff.sd = retval;
-- 
1.7.7

[PATCH v2 2/2] dlm: Do not allocate a fd for peeloff

[Benjamin Poirier]

avoids allocating a fd that a) propagates to every kernel thread and
usermodehelper b) is not properly released.

References: http://article.gmane.org/gmane.linux.network.drbd/22529
Signed-off-by: Benjamin Poirier <bpoirier@suse.de>
---
 fs/dlm/lowcomms.c |   22 ++++++++--------------
 1 files changed, 8 insertions(+), 14 deletions(-)

diff --git a/fs/dlm/lowcomms.c b/fs/dlm/lowcomms.c
index 0b3109e..ca0c59a 100644
--- a/fs/dlm/lowcomms.c
+++ b/fs/dlm/lowcomms.c
@@ -52,6 +52,7 @@
 #include <linux/mutex.h>
 #include <linux/sctp.h>
 #include <linux/slab.h>
+#include <net/sctp/sctp.h>
 #include <net/sctp/user.h>
 #include <net/ipv6.h>
 
@@ -474,9 +475,6 @@ static void process_sctp_notification(struct connection *con,
 			int prim_len, ret;
 			int addr_len;
 			struct connection *new_con;
-			sctp_peeloff_arg_t parg;
-			int parglen = sizeof(parg);
-			int err;
 
 			/*
 			 * We get this before any data for an association.
@@ -525,23 +523,19 @@ static void process_sctp_notification(struct connection *con,
 				return;
 
 			/* Peel off a new sock */
-			parg.associd = sn->sn_assoc_change.sac_assoc_id;
-			ret = kernel_getsockopt(con->sock, IPPROTO_SCTP,
-						SCTP_SOCKOPT_PEELOFF,
-						(void *)&parg, &parglen);
+			sctp_lock_sock(con->sock->sk);
+			ret = sctp_do_peeloff(con->sock->sk,
+				sn->sn_assoc_change.sac_assoc_id,
+				&new_con->sock);
+			sctp_release_sock(con->sock->sk);
 			if (ret < 0) {
 				log_print("Can't peel off a socket for "
 					  "connection %d to node %d: err=%d",
-					  parg.associd, nodeid, ret);
-				return;
-			}
-			new_con->sock = sockfd_lookup(parg.sd, &err);
-			if (!new_con->sock) {
-				log_print("sockfd_lookup error %d", err);
+					  (int)sn->sn_assoc_change.sac_assoc_id,
+					  nodeid, ret);
 				return;
 			}
 			add_sock(new_con->sock, new_con);
-			sockfd_put(new_con->sock);
 
 			log_print("connecting to %d sctp association %d",
 				 nodeid, (int)sn->sn_assoc_change.sac_assoc_id);
-- 
1.7.7

Re: [PATCH v2 1/2] sctp: Export sctp_do_peeloff

[Vladislav Yasevich]

On 03/08/2012 10:55 AM, Benjamin Poirier wrote:
> lookup sctp_association within sctp_do_peeloff() to enable its use outside of
> the sctp code with minimal knowledge of the former.
> 
> Signed-off-by: Benjamin Poirier <bpoirier@suse.de>
> 

Acked-by: Vlad Yasevich <vladislav.yasevich@hp.com>

-vlad

> ---
> Changes from v1:
> * make sctp_do_peeloff() take the assoc id as argument so that the dlm code
>   doesn't need to do the id to struct lookup itself
> * split those sctp changes to their own patch
> 
>  include/net/sctp/sctp.h |    1 +
>  net/sctp/socket.c       |   24 +++++++++---------------
>  2 files changed, 10 insertions(+), 15 deletions(-)
> 
> diff --git a/include/net/sctp/sctp.h b/include/net/sctp/sctp.h
> index d368561..6ee44b2 100644
> --- a/include/net/sctp/sctp.h
> +++ b/include/net/sctp/sctp.h
> @@ -413,6 +413,7 @@ static inline sctp_assoc_t sctp_assoc2id(const struct sctp_association *asoc)
>  /* Look up the association by its id.  */
>  struct sctp_association *sctp_id2assoc(struct sock *sk, sctp_assoc_t id);
>  
> +int sctp_do_peeloff(struct sock *sk, sctp_assoc_t id, struct socket **sockp);
>  
>  /* A macro to walk a list of skbs.  */
>  #define sctp_skb_for_each(pos, head, tmp) \
> diff --git a/net/sctp/socket.c b/net/sctp/socket.c
> index 408ebd0..06b42b7 100644
> --- a/net/sctp/socket.c
> +++ b/net/sctp/socket.c
> @@ -4170,14 +4170,16 @@ static int sctp_getsockopt_autoclose(struct sock *sk, int len, char __user *optv
>  }
>  
>  /* Helper routine to branch off an association to a new socket.  */
> -SCTP_STATIC int sctp_do_peeloff(struct sctp_association *asoc,
> -				struct socket **sockp)
> +int sctp_do_peeloff(struct sock *sk, sctp_assoc_t id, struct socket **sockp)
>  {
> -	struct sock *sk = asoc->base.sk;
> +	struct sctp_association *asoc = sctp_id2assoc(sk, id);
>  	struct socket *sock;
>  	struct sctp_af *af;
>  	int err = 0;
>  
> +	if (!asoc)
> +		return -EINVAL;
> +
>  	/* An association cannot be branched off from an already peeled-off
>  	 * socket, nor is this supported for tcp style sockets.
>  	 */
> @@ -4206,13 +4208,13 @@ SCTP_STATIC int sctp_do_peeloff(struct sctp_association *asoc,
>  
>  	return err;
>  }
> +EXPORT_SYMBOL(sctp_do_peeloff);
>  
>  static int sctp_getsockopt_peeloff(struct sock *sk, int len, char __user *optval, int __user *optlen)
>  {
>  	sctp_peeloff_arg_t peeloff;
>  	struct socket *newsock;
>  	int retval = 0;
> -	struct sctp_association *asoc;
>  
>  	if (len < sizeof(sctp_peeloff_arg_t))
>  		return -EINVAL;
> @@ -4220,15 +4222,7 @@ static int sctp_getsockopt_peeloff(struct sock *sk, int len, char __user *optval
>  	if (copy_from_user(&peeloff, optval, len))
>  		return -EFAULT;
>  
> -	asoc = sctp_id2assoc(sk, peeloff.associd);
> -	if (!asoc) {
> -		retval = -EINVAL;
> -		goto out;
> -	}
> -
> -	SCTP_DEBUG_PRINTK("%s: sk: %p asoc: %p\n", __func__, sk, asoc);
> -
> -	retval = sctp_do_peeloff(asoc, &newsock);
> +	retval = sctp_do_peeloff(sk, peeloff.associd, &newsock);
>  	if (retval < 0)
>  		goto out;
>  
> @@ -4239,8 +4233,8 @@ static int sctp_getsockopt_peeloff(struct sock *sk, int len, char __user *optval
>  		goto out;
>  	}
>  
> -	SCTP_DEBUG_PRINTK("%s: sk: %p asoc: %p newsk: %p sd: %d\n",
> -			  __func__, sk, asoc, newsock->sk, retval);
> +	SCTP_DEBUG_PRINTK("%s: sk: %p newsk: %p sd: %d\n",
> +			  __func__, sk, newsock->sk, retval);
>  
>  	/* Return the fd mapped to the new socket.  */
>  	peeloff.sd = retval;

Re: [PATCH v2 2/2] dlm: Do not allocate a fd for peeloff

[Vladislav Yasevich]

On 03/08/2012 10:55 AM, Benjamin Poirier wrote:
> avoids allocating a fd that a) propagates to every kernel thread and
> usermodehelper b) is not properly released.
> 
> References: http://article.gmane.org/gmane.linux.network.drbd/22529
> Signed-off-by: Benjamin Poirier <bpoirier@suse.de>

Looks much better.

-vlad

> ---
>  fs/dlm/lowcomms.c |   22 ++++++++--------------
>  1 files changed, 8 insertions(+), 14 deletions(-)
> 
> diff --git a/fs/dlm/lowcomms.c b/fs/dlm/lowcomms.c
> index 0b3109e..ca0c59a 100644
> --- a/fs/dlm/lowcomms.c
> +++ b/fs/dlm/lowcomms.c
> @@ -52,6 +52,7 @@
>  #include <linux/mutex.h>
>  #include <linux/sctp.h>
>  #include <linux/slab.h>
> +#include <net/sctp/sctp.h>
>  #include <net/sctp/user.h>
>  #include <net/ipv6.h>
>  
> @@ -474,9 +475,6 @@ static void process_sctp_notification(struct connection *con,
>  			int prim_len, ret;
>  			int addr_len;
>  			struct connection *new_con;
> -			sctp_peeloff_arg_t parg;
> -			int parglen = sizeof(parg);
> -			int err;
>  
>  			/*
>  			 * We get this before any data for an association.
> @@ -525,23 +523,19 @@ static void process_sctp_notification(struct connection *con,
>  				return;
>  
>  			/* Peel off a new sock */
> -			parg.associd = sn->sn_assoc_change.sac_assoc_id;
> -			ret = kernel_getsockopt(con->sock, IPPROTO_SCTP,
> -						SCTP_SOCKOPT_PEELOFF,
> -						(void *)&parg, &parglen);
> +			sctp_lock_sock(con->sock->sk);
> +			ret = sctp_do_peeloff(con->sock->sk,
> +				sn->sn_assoc_change.sac_assoc_id,
> +				&new_con->sock);
> +			sctp_release_sock(con->sock->sk);
>  			if (ret < 0) {
>  				log_print("Can't peel off a socket for "
>  					  "connection %d to node %d: err=%d",
> -					  parg.associd, nodeid, ret);
> -				return;
> -			}
> -			new_con->sock = sockfd_lookup(parg.sd, &err);
> -			if (!new_con->sock) {
> -				log_print("sockfd_lookup error %d", err);
> +					  (int)sn->sn_assoc_change.sac_assoc_id,
> +					  nodeid, ret);
>  				return;
>  			}
>  			add_sock(new_con->sock, new_con);
> -			sockfd_put(new_con->sock);
>  
>  			log_print("connecting to %d sctp association %d",
>  				 nodeid, (int)sn->sn_assoc_change.sac_assoc_id);

Re: [PATCH v2 1/2] sctp: Export sctp_do_peeloff

[David Miller]

From: Vladislav Yasevich <vladislav.yasevich@hp.com>
Date: Thu, 08 Mar 2012 15:07:40 -0500

> On 03/08/2012 10:55 AM, Benjamin Poirier wrote:
>> lookup sctp_association within sctp_do_peeloff() to enable its use outside of
>> the sctp code with minimal knowledge of the former.
>> 
>> Signed-off-by: Benjamin Poirier <bpoirier@suse.de>
>> 
> 
> Acked-by: Vlad Yasevich <vladislav.yasevich@hp.com>

Applied to net-next.

Re: [PATCH v2 2/2] dlm: Do not allocate a fd for peeloff

[David Miller]

From: Vladislav Yasevich <vladislav.yasevich@hp.com>
Date: Thu, 08 Mar 2012 15:08:17 -0500

> On 03/08/2012 10:55 AM, Benjamin Poirier wrote:
>> avoids allocating a fd that a) propagates to every kernel thread and
>> usermodehelper b) is not properly released.
>> 
>> References: http://article.gmane.org/gmane.linux.network.drbd/22529
>> Signed-off-by: Benjamin Poirier <bpoirier@suse.de>
> 
> Looks much better.

Also applied to net-next, thanks.