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Message-Id: <1253749920-18673-70-git-send-email-orenl@librato.com>
Date: Wed, 23 Sep 2009 19:51:49 -0400
From: Oren Laadan <orenl@...rato.com>
To: Andrew Morton <akpm@...ux-foundation.org>
Cc: Linus Torvalds <torvalds@...l.org>,
containers@...ts.linux-foundation.org,
linux-kernel@...r.kernel.org, linux-mm@...ck.org,
linux-api@...r.kernel.org, Serge Hallyn <serue@...ibm.com>,
Ingo Molnar <mingo@...e.hu>,
Pavel Emelyanov <xemul@...nvz.org>,
Oren Laadan <orenl@...rato.com>,
Oren Laadan <orenl@...columbia.edu>
Subject: [PATCH v18 69/80] c/r: introduce checkpoint/restore methods to struct proto_ops
This adds new 'proto_ops' function for checkpointing and restoring
sockets. This allows the checkpoint/restart code to compile nicely
when, e.g., AF_UNIX sockets are selected as a module.
It also adds a function 'collecting' a socket for leak-detection
during full-container checkpoint. This is useful for those sockets
that hold references to other "collectable" objects. Two examples are
AF_UNIX buffers which reference the socket of origin, and sockets that
have file descriptors in-transit.
Signed-off-by: Oren Laadan <orenl@...columbia.edu>
---
include/linux/net.h | 9 +++++++++
1 files changed, 9 insertions(+), 0 deletions(-)
diff --git a/include/linux/net.h b/include/linux/net.h
index 4fc2ffd..b99f350 100644
--- a/include/linux/net.h
+++ b/include/linux/net.h
@@ -147,6 +147,9 @@ struct sockaddr;
struct msghdr;
struct module;
+struct ckpt_ctx;
+struct ckpt_hdr_socket;
+
struct proto_ops {
int family;
struct module *owner;
@@ -191,6 +194,12 @@ struct proto_ops {
int offset, size_t size, int flags);
ssize_t (*splice_read)(struct socket *sock, loff_t *ppos,
struct pipe_inode_info *pipe, size_t len, unsigned int flags);
+ int (*checkpoint)(struct ckpt_ctx *ctx,
+ struct socket *sock);
+ int (*collect)(struct ckpt_ctx *ctx,
+ struct socket *sock);
+ int (*restore)(struct ckpt_ctx *ctx, struct socket *sock,
+ struct ckpt_hdr_socket *h);
};
struct net_proto_family {
--
1.6.0.4
--
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