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libceph: enable ceph in a non-default network namespace

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Grab a reference on a network namespace of the 'rbd map' (in case of
rbd) or 'mount' (in case of ceph) process and use that to open sockets
instead of always using init_net and bailing if network namespace is
anything but init_net.  Be careful to not share struct ceph_client
instances between different namespaces and don't add any code in the
!CONFIG_NET_NS case.

This is based on a patch from Hong Zhiguo <zhiguohong@tencent.com>.

Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Reviewed-by: Sage Weil <sage@redhat.com>
This commit is contained in:
Ilya Dryomov
2015-06-25 17:47:45 +03:00
parent d770e558e2
commit 757856d2b9
3 changed files with 22 additions and 7 deletions
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3
include/linux/ceph/messenger.h
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@@ -8,6 +8,7 @@
#include <linux/radix-tree.h>
#include <linux/uio.h>
#include <linux/workqueue.h>
#include <net/net_namespace.h>
#include <linux/ceph/types.h>
#include <linux/ceph/buffer.h>
@@ -56,6 +57,7 @@ struct ceph_messenger {
struct ceph_entity_addr my_enc_addr;
atomic_t stopping;
possible_net_t net;
bool nocrc;
bool tcp_nodelay;
@@ -267,6 +269,7 @@ extern void ceph_messenger_init(struct ceph_messenger *msgr,
u64 required_features,
bool nocrc,
bool tcp_nodelay);
extern void ceph_messenger_fini(struct ceph_messenger *msgr);
extern void ceph_con_init(struct ceph_connection *con, void *private,
const struct ceph_connection_operations *ops,