![Linus Torvalds](/assets/img/avatar_default.png)
- Add ocrdma hardware driver for Emulex IB-over-Ethernet adapters - Add generic and mlx4 support for "raw" QPs: allow suitably privileged applications to send and receive arbitrary packets directly to/from the hardware - Add "doorbell drop" handling to the cxgb4 driver - A fairly large batch of qib hardware driver changes - A few fixes for lockdep-detected issues - A few other miscellaneous fixes and cleanups -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.11 (GNU/Linux) iQIcBAABCAAGBQJPumbZAAoJEENa44ZhAt0h8LgP/0fXe7Szm3n6P6UvMAVqkagM 4PpreH3mpWUFpzqeQE1JPDtgx700R6aPipbHqgIN+k61RWMpLjICGcNx7iwxn1I+ zqdquGygWgjceLz+BLVlk+iBmJt3vZ3fPRAXc7fdP+jhIarWkNIOy1pXWTUuRvED jL8jIaxhCcgAVzm/zNyt6IPxkaHvCz7K9wqmpyU0dsO9OyPdGvWA9+CkGXwmOCPq mxSVhWnfGsMkPBsL7EgTC5KP/ox2PKq6rFgysmVVS+rKCpP0L8BEVQyGX3Gf8KA8 yV+KdTi9ofDnFrv6R7Wz0v7HRUih8GRssakzBu7Y7HLfK1M/QwMG0GUAibXGZObc vUXuQ3uRJ/cIzMPXqKeGYwpb5t+TmxyjhWu44OjCUQkNau91+9BSbA69S88KXc49 aTJiCZlhPuGf4uGMWJJuPLcE2xO2QCZj+8ckL2STYrIip6GWlCH02kJaQmRkuWH2 UhMOeJDBC4nvh4EQT/WwHpGzyhkavE2ayfo5YemxBJXo+P5Mdbf7WIDRQDLUEeQH F8sPoccH4hDiAorN/SkTsm14jVTP7oWW1M40Ont59Nhbgm88MsVkvjoneHnfBvbD HjK92soCWnYTAoREfj0G4xUxZgMdOZcezWrX0rx5LJ8Ju9y4zAi3cKGr7lg6hs4X syKfN0VjiDRtJ+pxayi3 =yWfr -----END PGP SIGNATURE----- Merge tag 'rdma-for-3.5' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband Pull InfiniBand/RDMA changes from Roland Dreier: - Add ocrdma hardware driver for Emulex IB-over-Ethernet adapters - Add generic and mlx4 support for "raw" QPs: allow suitably privileged applications to send and receive arbitrary packets directly to/from the hardware - Add "doorbell drop" handling to the cxgb4 driver - A fairly large batch of qib hardware driver changes - A few fixes for lockdep-detected issues - A few other miscellaneous fixes and cleanups Fix up trivial conflict in drivers/net/ethernet/emulex/benet/be.h. * tag 'rdma-for-3.5' of git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband: (53 commits) RDMA/cxgb4: Include vmalloc.h for vmalloc and vfree IB/mlx4: Fix mlx4_ib_add() error flow IB/core: Fix IB_SA_COMP_MASK macro IB/iser: Fix error flow in iser ep connection establishment IB/mlx4: Increase the number of vectors (EQs) available for ULPs RDMA/cxgb4: Add query_qp support RDMA/cxgb4: Remove kfifo usage RDMA/cxgb4: Use vmalloc() for debugfs QP dump RDMA/cxgb4: DB Drop Recovery for RDMA and LLD queues RDMA/cxgb4: Disable interrupts in c4iw_ev_dispatch() RDMA/cxgb4: Add DB Overflow Avoidance RDMA/cxgb4: Add debugfs RDMA memory stats cxgb4: DB Drop Recovery for RDMA and LLD queues cxgb4: Common platform specific changes for DB Drop Recovery cxgb4: Detect DB FULL events and notify RDMA ULD RDMA/cxgb4: Drop peer_abort when no endpoint found RDMA/cxgb4: Always wake up waiters in c4iw_peer_abort_intr() mlx4_core: Change bitmap allocator to work in round-robin fashion RDMA/nes: Don't call event handler if pointer is NULL RDMA/nes: Fix for the ORD value of the connecting peer ...
3509 lines
88 KiB
C
3509 lines
88 KiB
C
/*
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* Copyright (c) 2005 Voltaire Inc. All rights reserved.
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* Copyright (c) 2002-2005, Network Appliance, Inc. All rights reserved.
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* Copyright (c) 1999-2005, Mellanox Technologies, Inc. All rights reserved.
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* Copyright (c) 2005-2006 Intel Corporation. All rights reserved.
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*
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* This software is available to you under a choice of one of two
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* licenses. You may choose to be licensed under the terms of the GNU
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* General Public License (GPL) Version 2, available from the file
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* COPYING in the main directory of this source tree, or the
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* OpenIB.org BSD license below:
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*
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* Redistribution and use in source and binary forms, with or
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* without modification, are permitted provided that the following
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* conditions are met:
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*
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* - Redistributions of source code must retain the above
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* copyright notice, this list of conditions and the following
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* disclaimer.
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*
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* - Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials
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* provided with the distribution.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* SOFTWARE.
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*/
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#include <linux/completion.h>
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#include <linux/in.h>
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#include <linux/in6.h>
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#include <linux/mutex.h>
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#include <linux/random.h>
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#include <linux/idr.h>
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#include <linux/inetdevice.h>
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#include <linux/slab.h>
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#include <linux/module.h>
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#include <net/route.h>
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#include <net/tcp.h>
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#include <net/ipv6.h>
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#include <rdma/rdma_cm.h>
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#include <rdma/rdma_cm_ib.h>
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#include <rdma/rdma_netlink.h>
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#include <rdma/ib_cache.h>
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#include <rdma/ib_cm.h>
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#include <rdma/ib_sa.h>
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#include <rdma/iw_cm.h>
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MODULE_AUTHOR("Sean Hefty");
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MODULE_DESCRIPTION("Generic RDMA CM Agent");
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MODULE_LICENSE("Dual BSD/GPL");
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#define CMA_CM_RESPONSE_TIMEOUT 20
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#define CMA_MAX_CM_RETRIES 15
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#define CMA_CM_MRA_SETTING (IB_CM_MRA_FLAG_DELAY | 24)
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#define CMA_IBOE_PACKET_LIFETIME 18
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static void cma_add_one(struct ib_device *device);
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static void cma_remove_one(struct ib_device *device);
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static struct ib_client cma_client = {
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.name = "cma",
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.add = cma_add_one,
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.remove = cma_remove_one
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};
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static struct ib_sa_client sa_client;
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static struct rdma_addr_client addr_client;
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static LIST_HEAD(dev_list);
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static LIST_HEAD(listen_any_list);
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static DEFINE_MUTEX(lock);
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static struct workqueue_struct *cma_wq;
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static DEFINE_IDR(sdp_ps);
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static DEFINE_IDR(tcp_ps);
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static DEFINE_IDR(udp_ps);
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static DEFINE_IDR(ipoib_ps);
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static DEFINE_IDR(ib_ps);
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struct cma_device {
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struct list_head list;
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struct ib_device *device;
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struct completion comp;
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atomic_t refcount;
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struct list_head id_list;
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};
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struct rdma_bind_list {
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struct idr *ps;
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struct hlist_head owners;
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unsigned short port;
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};
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/*
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* Device removal can occur at anytime, so we need extra handling to
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* serialize notifying the user of device removal with other callbacks.
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* We do this by disabling removal notification while a callback is in process,
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* and reporting it after the callback completes.
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*/
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struct rdma_id_private {
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struct rdma_cm_id id;
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struct rdma_bind_list *bind_list;
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struct hlist_node node;
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struct list_head list; /* listen_any_list or cma_device.list */
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struct list_head listen_list; /* per device listens */
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struct cma_device *cma_dev;
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struct list_head mc_list;
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int internal_id;
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enum rdma_cm_state state;
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spinlock_t lock;
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struct mutex qp_mutex;
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struct completion comp;
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atomic_t refcount;
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struct mutex handler_mutex;
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int backlog;
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int timeout_ms;
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struct ib_sa_query *query;
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int query_id;
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union {
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struct ib_cm_id *ib;
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struct iw_cm_id *iw;
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} cm_id;
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u32 seq_num;
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u32 qkey;
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u32 qp_num;
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pid_t owner;
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u8 srq;
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u8 tos;
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u8 reuseaddr;
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};
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struct cma_multicast {
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struct rdma_id_private *id_priv;
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union {
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struct ib_sa_multicast *ib;
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} multicast;
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struct list_head list;
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void *context;
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struct sockaddr_storage addr;
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struct kref mcref;
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};
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struct cma_work {
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struct work_struct work;
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struct rdma_id_private *id;
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enum rdma_cm_state old_state;
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enum rdma_cm_state new_state;
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struct rdma_cm_event event;
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};
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struct cma_ndev_work {
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struct work_struct work;
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struct rdma_id_private *id;
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struct rdma_cm_event event;
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};
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struct iboe_mcast_work {
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struct work_struct work;
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struct rdma_id_private *id;
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struct cma_multicast *mc;
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};
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union cma_ip_addr {
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struct in6_addr ip6;
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struct {
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__be32 pad[3];
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__be32 addr;
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} ip4;
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};
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struct cma_hdr {
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u8 cma_version;
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u8 ip_version; /* IP version: 7:4 */
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__be16 port;
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union cma_ip_addr src_addr;
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union cma_ip_addr dst_addr;
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};
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struct sdp_hh {
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u8 bsdh[16];
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u8 sdp_version; /* Major version: 7:4 */
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u8 ip_version; /* IP version: 7:4 */
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u8 sdp_specific1[10];
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__be16 port;
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__be16 sdp_specific2;
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union cma_ip_addr src_addr;
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union cma_ip_addr dst_addr;
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};
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struct sdp_hah {
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u8 bsdh[16];
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u8 sdp_version;
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};
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#define CMA_VERSION 0x00
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#define SDP_MAJ_VERSION 0x2
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static int cma_comp(struct rdma_id_private *id_priv, enum rdma_cm_state comp)
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{
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unsigned long flags;
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int ret;
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spin_lock_irqsave(&id_priv->lock, flags);
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ret = (id_priv->state == comp);
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spin_unlock_irqrestore(&id_priv->lock, flags);
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return ret;
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}
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static int cma_comp_exch(struct rdma_id_private *id_priv,
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enum rdma_cm_state comp, enum rdma_cm_state exch)
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{
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unsigned long flags;
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int ret;
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spin_lock_irqsave(&id_priv->lock, flags);
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if ((ret = (id_priv->state == comp)))
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id_priv->state = exch;
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spin_unlock_irqrestore(&id_priv->lock, flags);
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return ret;
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}
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static enum rdma_cm_state cma_exch(struct rdma_id_private *id_priv,
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enum rdma_cm_state exch)
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{
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unsigned long flags;
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enum rdma_cm_state old;
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spin_lock_irqsave(&id_priv->lock, flags);
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old = id_priv->state;
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id_priv->state = exch;
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spin_unlock_irqrestore(&id_priv->lock, flags);
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return old;
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}
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static inline u8 cma_get_ip_ver(struct cma_hdr *hdr)
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{
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return hdr->ip_version >> 4;
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}
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static inline void cma_set_ip_ver(struct cma_hdr *hdr, u8 ip_ver)
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{
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hdr->ip_version = (ip_ver << 4) | (hdr->ip_version & 0xF);
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}
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static inline u8 sdp_get_majv(u8 sdp_version)
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{
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return sdp_version >> 4;
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}
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static inline u8 sdp_get_ip_ver(struct sdp_hh *hh)
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{
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return hh->ip_version >> 4;
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}
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static inline void sdp_set_ip_ver(struct sdp_hh *hh, u8 ip_ver)
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{
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hh->ip_version = (ip_ver << 4) | (hh->ip_version & 0xF);
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}
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static void cma_attach_to_dev(struct rdma_id_private *id_priv,
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struct cma_device *cma_dev)
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{
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atomic_inc(&cma_dev->refcount);
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id_priv->cma_dev = cma_dev;
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id_priv->id.device = cma_dev->device;
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id_priv->id.route.addr.dev_addr.transport =
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rdma_node_get_transport(cma_dev->device->node_type);
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list_add_tail(&id_priv->list, &cma_dev->id_list);
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}
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static inline void cma_deref_dev(struct cma_device *cma_dev)
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{
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if (atomic_dec_and_test(&cma_dev->refcount))
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complete(&cma_dev->comp);
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}
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static inline void release_mc(struct kref *kref)
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{
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struct cma_multicast *mc = container_of(kref, struct cma_multicast, mcref);
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kfree(mc->multicast.ib);
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kfree(mc);
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}
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static void cma_release_dev(struct rdma_id_private *id_priv)
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{
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mutex_lock(&lock);
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list_del(&id_priv->list);
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cma_deref_dev(id_priv->cma_dev);
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id_priv->cma_dev = NULL;
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mutex_unlock(&lock);
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}
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static int cma_set_qkey(struct rdma_id_private *id_priv)
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{
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struct ib_sa_mcmember_rec rec;
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int ret = 0;
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if (id_priv->qkey)
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return 0;
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switch (id_priv->id.ps) {
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case RDMA_PS_UDP:
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id_priv->qkey = RDMA_UDP_QKEY;
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break;
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case RDMA_PS_IPOIB:
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ib_addr_get_mgid(&id_priv->id.route.addr.dev_addr, &rec.mgid);
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ret = ib_sa_get_mcmember_rec(id_priv->id.device,
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id_priv->id.port_num, &rec.mgid,
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&rec);
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if (!ret)
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id_priv->qkey = be32_to_cpu(rec.qkey);
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break;
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default:
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break;
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}
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return ret;
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}
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static int find_gid_port(struct ib_device *device, union ib_gid *gid, u8 port_num)
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{
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int i;
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int err;
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struct ib_port_attr props;
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union ib_gid tmp;
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err = ib_query_port(device, port_num, &props);
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if (err)
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return 1;
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for (i = 0; i < props.gid_tbl_len; ++i) {
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err = ib_query_gid(device, port_num, i, &tmp);
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if (err)
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return 1;
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if (!memcmp(&tmp, gid, sizeof tmp))
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return 0;
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}
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return -EAGAIN;
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}
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static int cma_acquire_dev(struct rdma_id_private *id_priv)
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{
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struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
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struct cma_device *cma_dev;
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union ib_gid gid, iboe_gid;
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int ret = -ENODEV;
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u8 port;
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enum rdma_link_layer dev_ll = dev_addr->dev_type == ARPHRD_INFINIBAND ?
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IB_LINK_LAYER_INFINIBAND : IB_LINK_LAYER_ETHERNET;
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if (dev_ll != IB_LINK_LAYER_INFINIBAND &&
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id_priv->id.ps == RDMA_PS_IPOIB)
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return -EINVAL;
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mutex_lock(&lock);
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iboe_addr_get_sgid(dev_addr, &iboe_gid);
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memcpy(&gid, dev_addr->src_dev_addr +
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rdma_addr_gid_offset(dev_addr), sizeof gid);
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list_for_each_entry(cma_dev, &dev_list, list) {
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for (port = 1; port <= cma_dev->device->phys_port_cnt; ++port) {
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if (rdma_port_get_link_layer(cma_dev->device, port) == dev_ll) {
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if (rdma_node_get_transport(cma_dev->device->node_type) == RDMA_TRANSPORT_IB &&
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rdma_port_get_link_layer(cma_dev->device, port) == IB_LINK_LAYER_ETHERNET)
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ret = find_gid_port(cma_dev->device, &iboe_gid, port);
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else
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ret = find_gid_port(cma_dev->device, &gid, port);
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if (!ret) {
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id_priv->id.port_num = port;
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goto out;
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} else if (ret == 1)
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break;
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}
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}
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}
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out:
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if (!ret)
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cma_attach_to_dev(id_priv, cma_dev);
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mutex_unlock(&lock);
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return ret;
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}
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static void cma_deref_id(struct rdma_id_private *id_priv)
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{
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if (atomic_dec_and_test(&id_priv->refcount))
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complete(&id_priv->comp);
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}
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static int cma_disable_callback(struct rdma_id_private *id_priv,
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enum rdma_cm_state state)
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{
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mutex_lock(&id_priv->handler_mutex);
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if (id_priv->state != state) {
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mutex_unlock(&id_priv->handler_mutex);
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return -EINVAL;
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}
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return 0;
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}
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|
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struct rdma_cm_id *rdma_create_id(rdma_cm_event_handler event_handler,
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void *context, enum rdma_port_space ps,
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enum ib_qp_type qp_type)
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{
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struct rdma_id_private *id_priv;
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|
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id_priv = kzalloc(sizeof *id_priv, GFP_KERNEL);
|
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if (!id_priv)
|
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return ERR_PTR(-ENOMEM);
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|
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id_priv->owner = task_pid_nr(current);
|
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id_priv->state = RDMA_CM_IDLE;
|
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id_priv->id.context = context;
|
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id_priv->id.event_handler = event_handler;
|
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id_priv->id.ps = ps;
|
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id_priv->id.qp_type = qp_type;
|
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spin_lock_init(&id_priv->lock);
|
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mutex_init(&id_priv->qp_mutex);
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init_completion(&id_priv->comp);
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|
atomic_set(&id_priv->refcount, 1);
|
|
mutex_init(&id_priv->handler_mutex);
|
|
INIT_LIST_HEAD(&id_priv->listen_list);
|
|
INIT_LIST_HEAD(&id_priv->mc_list);
|
|
get_random_bytes(&id_priv->seq_num, sizeof id_priv->seq_num);
|
|
|
|
return &id_priv->id;
|
|
}
|
|
EXPORT_SYMBOL(rdma_create_id);
|
|
|
|
static int cma_init_ud_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
|
|
{
|
|
struct ib_qp_attr qp_attr;
|
|
int qp_attr_mask, ret;
|
|
|
|
qp_attr.qp_state = IB_QPS_INIT;
|
|
ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = ib_modify_qp(qp, &qp_attr, qp_attr_mask);
|
|
if (ret)
|
|
return ret;
|
|
|
|
qp_attr.qp_state = IB_QPS_RTR;
|
|
ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE);
|
|
if (ret)
|
|
return ret;
|
|
|
|
qp_attr.qp_state = IB_QPS_RTS;
|
|
qp_attr.sq_psn = 0;
|
|
ret = ib_modify_qp(qp, &qp_attr, IB_QP_STATE | IB_QP_SQ_PSN);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int cma_init_conn_qp(struct rdma_id_private *id_priv, struct ib_qp *qp)
|
|
{
|
|
struct ib_qp_attr qp_attr;
|
|
int qp_attr_mask, ret;
|
|
|
|
qp_attr.qp_state = IB_QPS_INIT;
|
|
ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
|
|
if (ret)
|
|
return ret;
|
|
|
|
return ib_modify_qp(qp, &qp_attr, qp_attr_mask);
|
|
}
|
|
|
|
int rdma_create_qp(struct rdma_cm_id *id, struct ib_pd *pd,
|
|
struct ib_qp_init_attr *qp_init_attr)
|
|
{
|
|
struct rdma_id_private *id_priv;
|
|
struct ib_qp *qp;
|
|
int ret;
|
|
|
|
id_priv = container_of(id, struct rdma_id_private, id);
|
|
if (id->device != pd->device)
|
|
return -EINVAL;
|
|
|
|
qp = ib_create_qp(pd, qp_init_attr);
|
|
if (IS_ERR(qp))
|
|
return PTR_ERR(qp);
|
|
|
|
if (id->qp_type == IB_QPT_UD)
|
|
ret = cma_init_ud_qp(id_priv, qp);
|
|
else
|
|
ret = cma_init_conn_qp(id_priv, qp);
|
|
if (ret)
|
|
goto err;
|
|
|
|
id->qp = qp;
|
|
id_priv->qp_num = qp->qp_num;
|
|
id_priv->srq = (qp->srq != NULL);
|
|
return 0;
|
|
err:
|
|
ib_destroy_qp(qp);
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(rdma_create_qp);
|
|
|
|
void rdma_destroy_qp(struct rdma_cm_id *id)
|
|
{
|
|
struct rdma_id_private *id_priv;
|
|
|
|
id_priv = container_of(id, struct rdma_id_private, id);
|
|
mutex_lock(&id_priv->qp_mutex);
|
|
ib_destroy_qp(id_priv->id.qp);
|
|
id_priv->id.qp = NULL;
|
|
mutex_unlock(&id_priv->qp_mutex);
|
|
}
|
|
EXPORT_SYMBOL(rdma_destroy_qp);
|
|
|
|
static int cma_modify_qp_rtr(struct rdma_id_private *id_priv,
|
|
struct rdma_conn_param *conn_param)
|
|
{
|
|
struct ib_qp_attr qp_attr;
|
|
int qp_attr_mask, ret;
|
|
|
|
mutex_lock(&id_priv->qp_mutex);
|
|
if (!id_priv->id.qp) {
|
|
ret = 0;
|
|
goto out;
|
|
}
|
|
|
|
/* Need to update QP attributes from default values. */
|
|
qp_attr.qp_state = IB_QPS_INIT;
|
|
ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
|
|
if (ret)
|
|
goto out;
|
|
|
|
ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
|
|
if (ret)
|
|
goto out;
|
|
|
|
qp_attr.qp_state = IB_QPS_RTR;
|
|
ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
|
|
if (ret)
|
|
goto out;
|
|
|
|
if (conn_param)
|
|
qp_attr.max_dest_rd_atomic = conn_param->responder_resources;
|
|
ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
|
|
out:
|
|
mutex_unlock(&id_priv->qp_mutex);
|
|
return ret;
|
|
}
|
|
|
|
static int cma_modify_qp_rts(struct rdma_id_private *id_priv,
|
|
struct rdma_conn_param *conn_param)
|
|
{
|
|
struct ib_qp_attr qp_attr;
|
|
int qp_attr_mask, ret;
|
|
|
|
mutex_lock(&id_priv->qp_mutex);
|
|
if (!id_priv->id.qp) {
|
|
ret = 0;
|
|
goto out;
|
|
}
|
|
|
|
qp_attr.qp_state = IB_QPS_RTS;
|
|
ret = rdma_init_qp_attr(&id_priv->id, &qp_attr, &qp_attr_mask);
|
|
if (ret)
|
|
goto out;
|
|
|
|
if (conn_param)
|
|
qp_attr.max_rd_atomic = conn_param->initiator_depth;
|
|
ret = ib_modify_qp(id_priv->id.qp, &qp_attr, qp_attr_mask);
|
|
out:
|
|
mutex_unlock(&id_priv->qp_mutex);
|
|
return ret;
|
|
}
|
|
|
|
static int cma_modify_qp_err(struct rdma_id_private *id_priv)
|
|
{
|
|
struct ib_qp_attr qp_attr;
|
|
int ret;
|
|
|
|
mutex_lock(&id_priv->qp_mutex);
|
|
if (!id_priv->id.qp) {
|
|
ret = 0;
|
|
goto out;
|
|
}
|
|
|
|
qp_attr.qp_state = IB_QPS_ERR;
|
|
ret = ib_modify_qp(id_priv->id.qp, &qp_attr, IB_QP_STATE);
|
|
out:
|
|
mutex_unlock(&id_priv->qp_mutex);
|
|
return ret;
|
|
}
|
|
|
|
static int cma_ib_init_qp_attr(struct rdma_id_private *id_priv,
|
|
struct ib_qp_attr *qp_attr, int *qp_attr_mask)
|
|
{
|
|
struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
|
|
int ret;
|
|
u16 pkey;
|
|
|
|
if (rdma_port_get_link_layer(id_priv->id.device, id_priv->id.port_num) ==
|
|
IB_LINK_LAYER_INFINIBAND)
|
|
pkey = ib_addr_get_pkey(dev_addr);
|
|
else
|
|
pkey = 0xffff;
|
|
|
|
ret = ib_find_cached_pkey(id_priv->id.device, id_priv->id.port_num,
|
|
pkey, &qp_attr->pkey_index);
|
|
if (ret)
|
|
return ret;
|
|
|
|
qp_attr->port_num = id_priv->id.port_num;
|
|
*qp_attr_mask = IB_QP_STATE | IB_QP_PKEY_INDEX | IB_QP_PORT;
|
|
|
|
if (id_priv->id.qp_type == IB_QPT_UD) {
|
|
ret = cma_set_qkey(id_priv);
|
|
if (ret)
|
|
return ret;
|
|
|
|
qp_attr->qkey = id_priv->qkey;
|
|
*qp_attr_mask |= IB_QP_QKEY;
|
|
} else {
|
|
qp_attr->qp_access_flags = 0;
|
|
*qp_attr_mask |= IB_QP_ACCESS_FLAGS;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
int rdma_init_qp_attr(struct rdma_cm_id *id, struct ib_qp_attr *qp_attr,
|
|
int *qp_attr_mask)
|
|
{
|
|
struct rdma_id_private *id_priv;
|
|
int ret = 0;
|
|
|
|
id_priv = container_of(id, struct rdma_id_private, id);
|
|
switch (rdma_node_get_transport(id_priv->id.device->node_type)) {
|
|
case RDMA_TRANSPORT_IB:
|
|
if (!id_priv->cm_id.ib || (id_priv->id.qp_type == IB_QPT_UD))
|
|
ret = cma_ib_init_qp_attr(id_priv, qp_attr, qp_attr_mask);
|
|
else
|
|
ret = ib_cm_init_qp_attr(id_priv->cm_id.ib, qp_attr,
|
|
qp_attr_mask);
|
|
if (qp_attr->qp_state == IB_QPS_RTR)
|
|
qp_attr->rq_psn = id_priv->seq_num;
|
|
break;
|
|
case RDMA_TRANSPORT_IWARP:
|
|
if (!id_priv->cm_id.iw) {
|
|
qp_attr->qp_access_flags = 0;
|
|
*qp_attr_mask = IB_QP_STATE | IB_QP_ACCESS_FLAGS;
|
|
} else
|
|
ret = iw_cm_init_qp_attr(id_priv->cm_id.iw, qp_attr,
|
|
qp_attr_mask);
|
|
break;
|
|
default:
|
|
ret = -ENOSYS;
|
|
break;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(rdma_init_qp_attr);
|
|
|
|
static inline int cma_zero_addr(struct sockaddr *addr)
|
|
{
|
|
struct in6_addr *ip6;
|
|
|
|
if (addr->sa_family == AF_INET)
|
|
return ipv4_is_zeronet(
|
|
((struct sockaddr_in *)addr)->sin_addr.s_addr);
|
|
else {
|
|
ip6 = &((struct sockaddr_in6 *) addr)->sin6_addr;
|
|
return (ip6->s6_addr32[0] | ip6->s6_addr32[1] |
|
|
ip6->s6_addr32[2] | ip6->s6_addr32[3]) == 0;
|
|
}
|
|
}
|
|
|
|
static inline int cma_loopback_addr(struct sockaddr *addr)
|
|
{
|
|
if (addr->sa_family == AF_INET)
|
|
return ipv4_is_loopback(
|
|
((struct sockaddr_in *) addr)->sin_addr.s_addr);
|
|
else
|
|
return ipv6_addr_loopback(
|
|
&((struct sockaddr_in6 *) addr)->sin6_addr);
|
|
}
|
|
|
|
static inline int cma_any_addr(struct sockaddr *addr)
|
|
{
|
|
return cma_zero_addr(addr) || cma_loopback_addr(addr);
|
|
}
|
|
|
|
static int cma_addr_cmp(struct sockaddr *src, struct sockaddr *dst)
|
|
{
|
|
if (src->sa_family != dst->sa_family)
|
|
return -1;
|
|
|
|
switch (src->sa_family) {
|
|
case AF_INET:
|
|
return ((struct sockaddr_in *) src)->sin_addr.s_addr !=
|
|
((struct sockaddr_in *) dst)->sin_addr.s_addr;
|
|
default:
|
|
return ipv6_addr_cmp(&((struct sockaddr_in6 *) src)->sin6_addr,
|
|
&((struct sockaddr_in6 *) dst)->sin6_addr);
|
|
}
|
|
}
|
|
|
|
static inline __be16 cma_port(struct sockaddr *addr)
|
|
{
|
|
if (addr->sa_family == AF_INET)
|
|
return ((struct sockaddr_in *) addr)->sin_port;
|
|
else
|
|
return ((struct sockaddr_in6 *) addr)->sin6_port;
|
|
}
|
|
|
|
static inline int cma_any_port(struct sockaddr *addr)
|
|
{
|
|
return !cma_port(addr);
|
|
}
|
|
|
|
static int cma_get_net_info(void *hdr, enum rdma_port_space ps,
|
|
u8 *ip_ver, __be16 *port,
|
|
union cma_ip_addr **src, union cma_ip_addr **dst)
|
|
{
|
|
switch (ps) {
|
|
case RDMA_PS_SDP:
|
|
if (sdp_get_majv(((struct sdp_hh *) hdr)->sdp_version) !=
|
|
SDP_MAJ_VERSION)
|
|
return -EINVAL;
|
|
|
|
*ip_ver = sdp_get_ip_ver(hdr);
|
|
*port = ((struct sdp_hh *) hdr)->port;
|
|
*src = &((struct sdp_hh *) hdr)->src_addr;
|
|
*dst = &((struct sdp_hh *) hdr)->dst_addr;
|
|
break;
|
|
default:
|
|
if (((struct cma_hdr *) hdr)->cma_version != CMA_VERSION)
|
|
return -EINVAL;
|
|
|
|
*ip_ver = cma_get_ip_ver(hdr);
|
|
*port = ((struct cma_hdr *) hdr)->port;
|
|
*src = &((struct cma_hdr *) hdr)->src_addr;
|
|
*dst = &((struct cma_hdr *) hdr)->dst_addr;
|
|
break;
|
|
}
|
|
|
|
if (*ip_ver != 4 && *ip_ver != 6)
|
|
return -EINVAL;
|
|
return 0;
|
|
}
|
|
|
|
static void cma_save_net_info(struct rdma_addr *addr,
|
|
struct rdma_addr *listen_addr,
|
|
u8 ip_ver, __be16 port,
|
|
union cma_ip_addr *src, union cma_ip_addr *dst)
|
|
{
|
|
struct sockaddr_in *listen4, *ip4;
|
|
struct sockaddr_in6 *listen6, *ip6;
|
|
|
|
switch (ip_ver) {
|
|
case 4:
|
|
listen4 = (struct sockaddr_in *) &listen_addr->src_addr;
|
|
ip4 = (struct sockaddr_in *) &addr->src_addr;
|
|
ip4->sin_family = listen4->sin_family;
|
|
ip4->sin_addr.s_addr = dst->ip4.addr;
|
|
ip4->sin_port = listen4->sin_port;
|
|
|
|
ip4 = (struct sockaddr_in *) &addr->dst_addr;
|
|
ip4->sin_family = listen4->sin_family;
|
|
ip4->sin_addr.s_addr = src->ip4.addr;
|
|
ip4->sin_port = port;
|
|
break;
|
|
case 6:
|
|
listen6 = (struct sockaddr_in6 *) &listen_addr->src_addr;
|
|
ip6 = (struct sockaddr_in6 *) &addr->src_addr;
|
|
ip6->sin6_family = listen6->sin6_family;
|
|
ip6->sin6_addr = dst->ip6;
|
|
ip6->sin6_port = listen6->sin6_port;
|
|
|
|
ip6 = (struct sockaddr_in6 *) &addr->dst_addr;
|
|
ip6->sin6_family = listen6->sin6_family;
|
|
ip6->sin6_addr = src->ip6;
|
|
ip6->sin6_port = port;
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
static inline int cma_user_data_offset(enum rdma_port_space ps)
|
|
{
|
|
switch (ps) {
|
|
case RDMA_PS_SDP:
|
|
return 0;
|
|
default:
|
|
return sizeof(struct cma_hdr);
|
|
}
|
|
}
|
|
|
|
static void cma_cancel_route(struct rdma_id_private *id_priv)
|
|
{
|
|
switch (rdma_port_get_link_layer(id_priv->id.device, id_priv->id.port_num)) {
|
|
case IB_LINK_LAYER_INFINIBAND:
|
|
if (id_priv->query)
|
|
ib_sa_cancel_query(id_priv->query_id, id_priv->query);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void cma_cancel_listens(struct rdma_id_private *id_priv)
|
|
{
|
|
struct rdma_id_private *dev_id_priv;
|
|
|
|
/*
|
|
* Remove from listen_any_list to prevent added devices from spawning
|
|
* additional listen requests.
|
|
*/
|
|
mutex_lock(&lock);
|
|
list_del(&id_priv->list);
|
|
|
|
while (!list_empty(&id_priv->listen_list)) {
|
|
dev_id_priv = list_entry(id_priv->listen_list.next,
|
|
struct rdma_id_private, listen_list);
|
|
/* sync with device removal to avoid duplicate destruction */
|
|
list_del_init(&dev_id_priv->list);
|
|
list_del(&dev_id_priv->listen_list);
|
|
mutex_unlock(&lock);
|
|
|
|
rdma_destroy_id(&dev_id_priv->id);
|
|
mutex_lock(&lock);
|
|
}
|
|
mutex_unlock(&lock);
|
|
}
|
|
|
|
static void cma_cancel_operation(struct rdma_id_private *id_priv,
|
|
enum rdma_cm_state state)
|
|
{
|
|
switch (state) {
|
|
case RDMA_CM_ADDR_QUERY:
|
|
rdma_addr_cancel(&id_priv->id.route.addr.dev_addr);
|
|
break;
|
|
case RDMA_CM_ROUTE_QUERY:
|
|
cma_cancel_route(id_priv);
|
|
break;
|
|
case RDMA_CM_LISTEN:
|
|
if (cma_any_addr((struct sockaddr *) &id_priv->id.route.addr.src_addr)
|
|
&& !id_priv->cma_dev)
|
|
cma_cancel_listens(id_priv);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void cma_release_port(struct rdma_id_private *id_priv)
|
|
{
|
|
struct rdma_bind_list *bind_list = id_priv->bind_list;
|
|
|
|
if (!bind_list)
|
|
return;
|
|
|
|
mutex_lock(&lock);
|
|
hlist_del(&id_priv->node);
|
|
if (hlist_empty(&bind_list->owners)) {
|
|
idr_remove(bind_list->ps, bind_list->port);
|
|
kfree(bind_list);
|
|
}
|
|
mutex_unlock(&lock);
|
|
}
|
|
|
|
static void cma_leave_mc_groups(struct rdma_id_private *id_priv)
|
|
{
|
|
struct cma_multicast *mc;
|
|
|
|
while (!list_empty(&id_priv->mc_list)) {
|
|
mc = container_of(id_priv->mc_list.next,
|
|
struct cma_multicast, list);
|
|
list_del(&mc->list);
|
|
switch (rdma_port_get_link_layer(id_priv->cma_dev->device, id_priv->id.port_num)) {
|
|
case IB_LINK_LAYER_INFINIBAND:
|
|
ib_sa_free_multicast(mc->multicast.ib);
|
|
kfree(mc);
|
|
break;
|
|
case IB_LINK_LAYER_ETHERNET:
|
|
kref_put(&mc->mcref, release_mc);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
void rdma_destroy_id(struct rdma_cm_id *id)
|
|
{
|
|
struct rdma_id_private *id_priv;
|
|
enum rdma_cm_state state;
|
|
|
|
id_priv = container_of(id, struct rdma_id_private, id);
|
|
state = cma_exch(id_priv, RDMA_CM_DESTROYING);
|
|
cma_cancel_operation(id_priv, state);
|
|
|
|
/*
|
|
* Wait for any active callback to finish. New callbacks will find
|
|
* the id_priv state set to destroying and abort.
|
|
*/
|
|
mutex_lock(&id_priv->handler_mutex);
|
|
mutex_unlock(&id_priv->handler_mutex);
|
|
|
|
if (id_priv->cma_dev) {
|
|
switch (rdma_node_get_transport(id_priv->id.device->node_type)) {
|
|
case RDMA_TRANSPORT_IB:
|
|
if (id_priv->cm_id.ib)
|
|
ib_destroy_cm_id(id_priv->cm_id.ib);
|
|
break;
|
|
case RDMA_TRANSPORT_IWARP:
|
|
if (id_priv->cm_id.iw)
|
|
iw_destroy_cm_id(id_priv->cm_id.iw);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
cma_leave_mc_groups(id_priv);
|
|
cma_release_dev(id_priv);
|
|
}
|
|
|
|
cma_release_port(id_priv);
|
|
cma_deref_id(id_priv);
|
|
wait_for_completion(&id_priv->comp);
|
|
|
|
if (id_priv->internal_id)
|
|
cma_deref_id(id_priv->id.context);
|
|
|
|
kfree(id_priv->id.route.path_rec);
|
|
kfree(id_priv);
|
|
}
|
|
EXPORT_SYMBOL(rdma_destroy_id);
|
|
|
|
static int cma_rep_recv(struct rdma_id_private *id_priv)
|
|
{
|
|
int ret;
|
|
|
|
ret = cma_modify_qp_rtr(id_priv, NULL);
|
|
if (ret)
|
|
goto reject;
|
|
|
|
ret = cma_modify_qp_rts(id_priv, NULL);
|
|
if (ret)
|
|
goto reject;
|
|
|
|
ret = ib_send_cm_rtu(id_priv->cm_id.ib, NULL, 0);
|
|
if (ret)
|
|
goto reject;
|
|
|
|
return 0;
|
|
reject:
|
|
cma_modify_qp_err(id_priv);
|
|
ib_send_cm_rej(id_priv->cm_id.ib, IB_CM_REJ_CONSUMER_DEFINED,
|
|
NULL, 0, NULL, 0);
|
|
return ret;
|
|
}
|
|
|
|
static int cma_verify_rep(struct rdma_id_private *id_priv, void *data)
|
|
{
|
|
if (id_priv->id.ps == RDMA_PS_SDP &&
|
|
sdp_get_majv(((struct sdp_hah *) data)->sdp_version) !=
|
|
SDP_MAJ_VERSION)
|
|
return -EINVAL;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void cma_set_rep_event_data(struct rdma_cm_event *event,
|
|
struct ib_cm_rep_event_param *rep_data,
|
|
void *private_data)
|
|
{
|
|
event->param.conn.private_data = private_data;
|
|
event->param.conn.private_data_len = IB_CM_REP_PRIVATE_DATA_SIZE;
|
|
event->param.conn.responder_resources = rep_data->responder_resources;
|
|
event->param.conn.initiator_depth = rep_data->initiator_depth;
|
|
event->param.conn.flow_control = rep_data->flow_control;
|
|
event->param.conn.rnr_retry_count = rep_data->rnr_retry_count;
|
|
event->param.conn.srq = rep_data->srq;
|
|
event->param.conn.qp_num = rep_data->remote_qpn;
|
|
}
|
|
|
|
static int cma_ib_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
|
|
{
|
|
struct rdma_id_private *id_priv = cm_id->context;
|
|
struct rdma_cm_event event;
|
|
int ret = 0;
|
|
|
|
if ((ib_event->event != IB_CM_TIMEWAIT_EXIT &&
|
|
cma_disable_callback(id_priv, RDMA_CM_CONNECT)) ||
|
|
(ib_event->event == IB_CM_TIMEWAIT_EXIT &&
|
|
cma_disable_callback(id_priv, RDMA_CM_DISCONNECT)))
|
|
return 0;
|
|
|
|
memset(&event, 0, sizeof event);
|
|
switch (ib_event->event) {
|
|
case IB_CM_REQ_ERROR:
|
|
case IB_CM_REP_ERROR:
|
|
event.event = RDMA_CM_EVENT_UNREACHABLE;
|
|
event.status = -ETIMEDOUT;
|
|
break;
|
|
case IB_CM_REP_RECEIVED:
|
|
event.status = cma_verify_rep(id_priv, ib_event->private_data);
|
|
if (event.status)
|
|
event.event = RDMA_CM_EVENT_CONNECT_ERROR;
|
|
else if (id_priv->id.qp && id_priv->id.ps != RDMA_PS_SDP) {
|
|
event.status = cma_rep_recv(id_priv);
|
|
event.event = event.status ? RDMA_CM_EVENT_CONNECT_ERROR :
|
|
RDMA_CM_EVENT_ESTABLISHED;
|
|
} else
|
|
event.event = RDMA_CM_EVENT_CONNECT_RESPONSE;
|
|
cma_set_rep_event_data(&event, &ib_event->param.rep_rcvd,
|
|
ib_event->private_data);
|
|
break;
|
|
case IB_CM_RTU_RECEIVED:
|
|
case IB_CM_USER_ESTABLISHED:
|
|
event.event = RDMA_CM_EVENT_ESTABLISHED;
|
|
break;
|
|
case IB_CM_DREQ_ERROR:
|
|
event.status = -ETIMEDOUT; /* fall through */
|
|
case IB_CM_DREQ_RECEIVED:
|
|
case IB_CM_DREP_RECEIVED:
|
|
if (!cma_comp_exch(id_priv, RDMA_CM_CONNECT,
|
|
RDMA_CM_DISCONNECT))
|
|
goto out;
|
|
event.event = RDMA_CM_EVENT_DISCONNECTED;
|
|
break;
|
|
case IB_CM_TIMEWAIT_EXIT:
|
|
event.event = RDMA_CM_EVENT_TIMEWAIT_EXIT;
|
|
break;
|
|
case IB_CM_MRA_RECEIVED:
|
|
/* ignore event */
|
|
goto out;
|
|
case IB_CM_REJ_RECEIVED:
|
|
cma_modify_qp_err(id_priv);
|
|
event.status = ib_event->param.rej_rcvd.reason;
|
|
event.event = RDMA_CM_EVENT_REJECTED;
|
|
event.param.conn.private_data = ib_event->private_data;
|
|
event.param.conn.private_data_len = IB_CM_REJ_PRIVATE_DATA_SIZE;
|
|
break;
|
|
default:
|
|
printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d\n",
|
|
ib_event->event);
|
|
goto out;
|
|
}
|
|
|
|
ret = id_priv->id.event_handler(&id_priv->id, &event);
|
|
if (ret) {
|
|
/* Destroy the CM ID by returning a non-zero value. */
|
|
id_priv->cm_id.ib = NULL;
|
|
cma_exch(id_priv, RDMA_CM_DESTROYING);
|
|
mutex_unlock(&id_priv->handler_mutex);
|
|
rdma_destroy_id(&id_priv->id);
|
|
return ret;
|
|
}
|
|
out:
|
|
mutex_unlock(&id_priv->handler_mutex);
|
|
return ret;
|
|
}
|
|
|
|
static struct rdma_id_private *cma_new_conn_id(struct rdma_cm_id *listen_id,
|
|
struct ib_cm_event *ib_event)
|
|
{
|
|
struct rdma_id_private *id_priv;
|
|
struct rdma_cm_id *id;
|
|
struct rdma_route *rt;
|
|
union cma_ip_addr *src, *dst;
|
|
__be16 port;
|
|
u8 ip_ver;
|
|
int ret;
|
|
|
|
if (cma_get_net_info(ib_event->private_data, listen_id->ps,
|
|
&ip_ver, &port, &src, &dst))
|
|
return NULL;
|
|
|
|
id = rdma_create_id(listen_id->event_handler, listen_id->context,
|
|
listen_id->ps, ib_event->param.req_rcvd.qp_type);
|
|
if (IS_ERR(id))
|
|
return NULL;
|
|
|
|
cma_save_net_info(&id->route.addr, &listen_id->route.addr,
|
|
ip_ver, port, src, dst);
|
|
|
|
rt = &id->route;
|
|
rt->num_paths = ib_event->param.req_rcvd.alternate_path ? 2 : 1;
|
|
rt->path_rec = kmalloc(sizeof *rt->path_rec * rt->num_paths,
|
|
GFP_KERNEL);
|
|
if (!rt->path_rec)
|
|
goto err;
|
|
|
|
rt->path_rec[0] = *ib_event->param.req_rcvd.primary_path;
|
|
if (rt->num_paths == 2)
|
|
rt->path_rec[1] = *ib_event->param.req_rcvd.alternate_path;
|
|
|
|
if (cma_any_addr((struct sockaddr *) &rt->addr.src_addr)) {
|
|
rt->addr.dev_addr.dev_type = ARPHRD_INFINIBAND;
|
|
rdma_addr_set_sgid(&rt->addr.dev_addr, &rt->path_rec[0].sgid);
|
|
ib_addr_set_pkey(&rt->addr.dev_addr, be16_to_cpu(rt->path_rec[0].pkey));
|
|
} else {
|
|
ret = rdma_translate_ip((struct sockaddr *) &rt->addr.src_addr,
|
|
&rt->addr.dev_addr);
|
|
if (ret)
|
|
goto err;
|
|
}
|
|
rdma_addr_set_dgid(&rt->addr.dev_addr, &rt->path_rec[0].dgid);
|
|
|
|
id_priv = container_of(id, struct rdma_id_private, id);
|
|
id_priv->state = RDMA_CM_CONNECT;
|
|
return id_priv;
|
|
|
|
err:
|
|
rdma_destroy_id(id);
|
|
return NULL;
|
|
}
|
|
|
|
static struct rdma_id_private *cma_new_udp_id(struct rdma_cm_id *listen_id,
|
|
struct ib_cm_event *ib_event)
|
|
{
|
|
struct rdma_id_private *id_priv;
|
|
struct rdma_cm_id *id;
|
|
union cma_ip_addr *src, *dst;
|
|
__be16 port;
|
|
u8 ip_ver;
|
|
int ret;
|
|
|
|
id = rdma_create_id(listen_id->event_handler, listen_id->context,
|
|
listen_id->ps, IB_QPT_UD);
|
|
if (IS_ERR(id))
|
|
return NULL;
|
|
|
|
|
|
if (cma_get_net_info(ib_event->private_data, listen_id->ps,
|
|
&ip_ver, &port, &src, &dst))
|
|
goto err;
|
|
|
|
cma_save_net_info(&id->route.addr, &listen_id->route.addr,
|
|
ip_ver, port, src, dst);
|
|
|
|
if (!cma_any_addr((struct sockaddr *) &id->route.addr.src_addr)) {
|
|
ret = rdma_translate_ip((struct sockaddr *) &id->route.addr.src_addr,
|
|
&id->route.addr.dev_addr);
|
|
if (ret)
|
|
goto err;
|
|
}
|
|
|
|
id_priv = container_of(id, struct rdma_id_private, id);
|
|
id_priv->state = RDMA_CM_CONNECT;
|
|
return id_priv;
|
|
err:
|
|
rdma_destroy_id(id);
|
|
return NULL;
|
|
}
|
|
|
|
static void cma_set_req_event_data(struct rdma_cm_event *event,
|
|
struct ib_cm_req_event_param *req_data,
|
|
void *private_data, int offset)
|
|
{
|
|
event->param.conn.private_data = private_data + offset;
|
|
event->param.conn.private_data_len = IB_CM_REQ_PRIVATE_DATA_SIZE - offset;
|
|
event->param.conn.responder_resources = req_data->responder_resources;
|
|
event->param.conn.initiator_depth = req_data->initiator_depth;
|
|
event->param.conn.flow_control = req_data->flow_control;
|
|
event->param.conn.retry_count = req_data->retry_count;
|
|
event->param.conn.rnr_retry_count = req_data->rnr_retry_count;
|
|
event->param.conn.srq = req_data->srq;
|
|
event->param.conn.qp_num = req_data->remote_qpn;
|
|
}
|
|
|
|
static int cma_check_req_qp_type(struct rdma_cm_id *id, struct ib_cm_event *ib_event)
|
|
{
|
|
return (((ib_event->event == IB_CM_REQ_RECEIVED) ||
|
|
(ib_event->param.req_rcvd.qp_type == id->qp_type)) ||
|
|
((ib_event->event == IB_CM_SIDR_REQ_RECEIVED) &&
|
|
(id->qp_type == IB_QPT_UD)) ||
|
|
(!id->qp_type));
|
|
}
|
|
|
|
static int cma_req_handler(struct ib_cm_id *cm_id, struct ib_cm_event *ib_event)
|
|
{
|
|
struct rdma_id_private *listen_id, *conn_id;
|
|
struct rdma_cm_event event;
|
|
int offset, ret;
|
|
|
|
listen_id = cm_id->context;
|
|
if (!cma_check_req_qp_type(&listen_id->id, ib_event))
|
|
return -EINVAL;
|
|
|
|
if (cma_disable_callback(listen_id, RDMA_CM_LISTEN))
|
|
return -ECONNABORTED;
|
|
|
|
memset(&event, 0, sizeof event);
|
|
offset = cma_user_data_offset(listen_id->id.ps);
|
|
event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
|
|
if (ib_event->event == IB_CM_SIDR_REQ_RECEIVED) {
|
|
conn_id = cma_new_udp_id(&listen_id->id, ib_event);
|
|
event.param.ud.private_data = ib_event->private_data + offset;
|
|
event.param.ud.private_data_len =
|
|
IB_CM_SIDR_REQ_PRIVATE_DATA_SIZE - offset;
|
|
} else {
|
|
conn_id = cma_new_conn_id(&listen_id->id, ib_event);
|
|
cma_set_req_event_data(&event, &ib_event->param.req_rcvd,
|
|
ib_event->private_data, offset);
|
|
}
|
|
if (!conn_id) {
|
|
ret = -ENOMEM;
|
|
goto err1;
|
|
}
|
|
|
|
mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING);
|
|
ret = cma_acquire_dev(conn_id);
|
|
if (ret)
|
|
goto err2;
|
|
|
|
conn_id->cm_id.ib = cm_id;
|
|
cm_id->context = conn_id;
|
|
cm_id->cm_handler = cma_ib_handler;
|
|
|
|
/*
|
|
* Protect against the user destroying conn_id from another thread
|
|
* until we're done accessing it.
|
|
*/
|
|
atomic_inc(&conn_id->refcount);
|
|
ret = conn_id->id.event_handler(&conn_id->id, &event);
|
|
if (ret)
|
|
goto err3;
|
|
|
|
/*
|
|
* Acquire mutex to prevent user executing rdma_destroy_id()
|
|
* while we're accessing the cm_id.
|
|
*/
|
|
mutex_lock(&lock);
|
|
if (cma_comp(conn_id, RDMA_CM_CONNECT) && (conn_id->id.qp_type != IB_QPT_UD))
|
|
ib_send_cm_mra(cm_id, CMA_CM_MRA_SETTING, NULL, 0);
|
|
mutex_unlock(&lock);
|
|
mutex_unlock(&conn_id->handler_mutex);
|
|
mutex_unlock(&listen_id->handler_mutex);
|
|
cma_deref_id(conn_id);
|
|
return 0;
|
|
|
|
err3:
|
|
cma_deref_id(conn_id);
|
|
/* Destroy the CM ID by returning a non-zero value. */
|
|
conn_id->cm_id.ib = NULL;
|
|
err2:
|
|
cma_exch(conn_id, RDMA_CM_DESTROYING);
|
|
mutex_unlock(&conn_id->handler_mutex);
|
|
err1:
|
|
mutex_unlock(&listen_id->handler_mutex);
|
|
if (conn_id)
|
|
rdma_destroy_id(&conn_id->id);
|
|
return ret;
|
|
}
|
|
|
|
static __be64 cma_get_service_id(enum rdma_port_space ps, struct sockaddr *addr)
|
|
{
|
|
return cpu_to_be64(((u64)ps << 16) + be16_to_cpu(cma_port(addr)));
|
|
}
|
|
|
|
static void cma_set_compare_data(enum rdma_port_space ps, struct sockaddr *addr,
|
|
struct ib_cm_compare_data *compare)
|
|
{
|
|
struct cma_hdr *cma_data, *cma_mask;
|
|
struct sdp_hh *sdp_data, *sdp_mask;
|
|
__be32 ip4_addr;
|
|
struct in6_addr ip6_addr;
|
|
|
|
memset(compare, 0, sizeof *compare);
|
|
cma_data = (void *) compare->data;
|
|
cma_mask = (void *) compare->mask;
|
|
sdp_data = (void *) compare->data;
|
|
sdp_mask = (void *) compare->mask;
|
|
|
|
switch (addr->sa_family) {
|
|
case AF_INET:
|
|
ip4_addr = ((struct sockaddr_in *) addr)->sin_addr.s_addr;
|
|
if (ps == RDMA_PS_SDP) {
|
|
sdp_set_ip_ver(sdp_data, 4);
|
|
sdp_set_ip_ver(sdp_mask, 0xF);
|
|
sdp_data->dst_addr.ip4.addr = ip4_addr;
|
|
sdp_mask->dst_addr.ip4.addr = htonl(~0);
|
|
} else {
|
|
cma_set_ip_ver(cma_data, 4);
|
|
cma_set_ip_ver(cma_mask, 0xF);
|
|
cma_data->dst_addr.ip4.addr = ip4_addr;
|
|
cma_mask->dst_addr.ip4.addr = htonl(~0);
|
|
}
|
|
break;
|
|
case AF_INET6:
|
|
ip6_addr = ((struct sockaddr_in6 *) addr)->sin6_addr;
|
|
if (ps == RDMA_PS_SDP) {
|
|
sdp_set_ip_ver(sdp_data, 6);
|
|
sdp_set_ip_ver(sdp_mask, 0xF);
|
|
sdp_data->dst_addr.ip6 = ip6_addr;
|
|
memset(&sdp_mask->dst_addr.ip6, 0xFF,
|
|
sizeof sdp_mask->dst_addr.ip6);
|
|
} else {
|
|
cma_set_ip_ver(cma_data, 6);
|
|
cma_set_ip_ver(cma_mask, 0xF);
|
|
cma_data->dst_addr.ip6 = ip6_addr;
|
|
memset(&cma_mask->dst_addr.ip6, 0xFF,
|
|
sizeof cma_mask->dst_addr.ip6);
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
static int cma_iw_handler(struct iw_cm_id *iw_id, struct iw_cm_event *iw_event)
|
|
{
|
|
struct rdma_id_private *id_priv = iw_id->context;
|
|
struct rdma_cm_event event;
|
|
struct sockaddr_in *sin;
|
|
int ret = 0;
|
|
|
|
if (cma_disable_callback(id_priv, RDMA_CM_CONNECT))
|
|
return 0;
|
|
|
|
memset(&event, 0, sizeof event);
|
|
switch (iw_event->event) {
|
|
case IW_CM_EVENT_CLOSE:
|
|
event.event = RDMA_CM_EVENT_DISCONNECTED;
|
|
break;
|
|
case IW_CM_EVENT_CONNECT_REPLY:
|
|
sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
|
|
*sin = iw_event->local_addr;
|
|
sin = (struct sockaddr_in *) &id_priv->id.route.addr.dst_addr;
|
|
*sin = iw_event->remote_addr;
|
|
switch (iw_event->status) {
|
|
case 0:
|
|
event.event = RDMA_CM_EVENT_ESTABLISHED;
|
|
event.param.conn.initiator_depth = iw_event->ird;
|
|
event.param.conn.responder_resources = iw_event->ord;
|
|
break;
|
|
case -ECONNRESET:
|
|
case -ECONNREFUSED:
|
|
event.event = RDMA_CM_EVENT_REJECTED;
|
|
break;
|
|
case -ETIMEDOUT:
|
|
event.event = RDMA_CM_EVENT_UNREACHABLE;
|
|
break;
|
|
default:
|
|
event.event = RDMA_CM_EVENT_CONNECT_ERROR;
|
|
break;
|
|
}
|
|
break;
|
|
case IW_CM_EVENT_ESTABLISHED:
|
|
event.event = RDMA_CM_EVENT_ESTABLISHED;
|
|
event.param.conn.initiator_depth = iw_event->ird;
|
|
event.param.conn.responder_resources = iw_event->ord;
|
|
break;
|
|
default:
|
|
BUG_ON(1);
|
|
}
|
|
|
|
event.status = iw_event->status;
|
|
event.param.conn.private_data = iw_event->private_data;
|
|
event.param.conn.private_data_len = iw_event->private_data_len;
|
|
ret = id_priv->id.event_handler(&id_priv->id, &event);
|
|
if (ret) {
|
|
/* Destroy the CM ID by returning a non-zero value. */
|
|
id_priv->cm_id.iw = NULL;
|
|
cma_exch(id_priv, RDMA_CM_DESTROYING);
|
|
mutex_unlock(&id_priv->handler_mutex);
|
|
rdma_destroy_id(&id_priv->id);
|
|
return ret;
|
|
}
|
|
|
|
mutex_unlock(&id_priv->handler_mutex);
|
|
return ret;
|
|
}
|
|
|
|
static int iw_conn_req_handler(struct iw_cm_id *cm_id,
|
|
struct iw_cm_event *iw_event)
|
|
{
|
|
struct rdma_cm_id *new_cm_id;
|
|
struct rdma_id_private *listen_id, *conn_id;
|
|
struct sockaddr_in *sin;
|
|
struct net_device *dev = NULL;
|
|
struct rdma_cm_event event;
|
|
int ret;
|
|
struct ib_device_attr attr;
|
|
|
|
listen_id = cm_id->context;
|
|
if (cma_disable_callback(listen_id, RDMA_CM_LISTEN))
|
|
return -ECONNABORTED;
|
|
|
|
/* Create a new RDMA id for the new IW CM ID */
|
|
new_cm_id = rdma_create_id(listen_id->id.event_handler,
|
|
listen_id->id.context,
|
|
RDMA_PS_TCP, IB_QPT_RC);
|
|
if (IS_ERR(new_cm_id)) {
|
|
ret = -ENOMEM;
|
|
goto out;
|
|
}
|
|
conn_id = container_of(new_cm_id, struct rdma_id_private, id);
|
|
mutex_lock_nested(&conn_id->handler_mutex, SINGLE_DEPTH_NESTING);
|
|
conn_id->state = RDMA_CM_CONNECT;
|
|
|
|
dev = ip_dev_find(&init_net, iw_event->local_addr.sin_addr.s_addr);
|
|
if (!dev) {
|
|
ret = -EADDRNOTAVAIL;
|
|
mutex_unlock(&conn_id->handler_mutex);
|
|
rdma_destroy_id(new_cm_id);
|
|
goto out;
|
|
}
|
|
ret = rdma_copy_addr(&conn_id->id.route.addr.dev_addr, dev, NULL);
|
|
if (ret) {
|
|
mutex_unlock(&conn_id->handler_mutex);
|
|
rdma_destroy_id(new_cm_id);
|
|
goto out;
|
|
}
|
|
|
|
ret = cma_acquire_dev(conn_id);
|
|
if (ret) {
|
|
mutex_unlock(&conn_id->handler_mutex);
|
|
rdma_destroy_id(new_cm_id);
|
|
goto out;
|
|
}
|
|
|
|
conn_id->cm_id.iw = cm_id;
|
|
cm_id->context = conn_id;
|
|
cm_id->cm_handler = cma_iw_handler;
|
|
|
|
sin = (struct sockaddr_in *) &new_cm_id->route.addr.src_addr;
|
|
*sin = iw_event->local_addr;
|
|
sin = (struct sockaddr_in *) &new_cm_id->route.addr.dst_addr;
|
|
*sin = iw_event->remote_addr;
|
|
|
|
ret = ib_query_device(conn_id->id.device, &attr);
|
|
if (ret) {
|
|
mutex_unlock(&conn_id->handler_mutex);
|
|
rdma_destroy_id(new_cm_id);
|
|
goto out;
|
|
}
|
|
|
|
memset(&event, 0, sizeof event);
|
|
event.event = RDMA_CM_EVENT_CONNECT_REQUEST;
|
|
event.param.conn.private_data = iw_event->private_data;
|
|
event.param.conn.private_data_len = iw_event->private_data_len;
|
|
event.param.conn.initiator_depth = iw_event->ird;
|
|
event.param.conn.responder_resources = iw_event->ord;
|
|
|
|
/*
|
|
* Protect against the user destroying conn_id from another thread
|
|
* until we're done accessing it.
|
|
*/
|
|
atomic_inc(&conn_id->refcount);
|
|
ret = conn_id->id.event_handler(&conn_id->id, &event);
|
|
if (ret) {
|
|
/* User wants to destroy the CM ID */
|
|
conn_id->cm_id.iw = NULL;
|
|
cma_exch(conn_id, RDMA_CM_DESTROYING);
|
|
mutex_unlock(&conn_id->handler_mutex);
|
|
cma_deref_id(conn_id);
|
|
rdma_destroy_id(&conn_id->id);
|
|
goto out;
|
|
}
|
|
|
|
mutex_unlock(&conn_id->handler_mutex);
|
|
cma_deref_id(conn_id);
|
|
|
|
out:
|
|
if (dev)
|
|
dev_put(dev);
|
|
mutex_unlock(&listen_id->handler_mutex);
|
|
return ret;
|
|
}
|
|
|
|
static int cma_ib_listen(struct rdma_id_private *id_priv)
|
|
{
|
|
struct ib_cm_compare_data compare_data;
|
|
struct sockaddr *addr;
|
|
struct ib_cm_id *id;
|
|
__be64 svc_id;
|
|
int ret;
|
|
|
|
id = ib_create_cm_id(id_priv->id.device, cma_req_handler, id_priv);
|
|
if (IS_ERR(id))
|
|
return PTR_ERR(id);
|
|
|
|
id_priv->cm_id.ib = id;
|
|
|
|
addr = (struct sockaddr *) &id_priv->id.route.addr.src_addr;
|
|
svc_id = cma_get_service_id(id_priv->id.ps, addr);
|
|
if (cma_any_addr(addr))
|
|
ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, NULL);
|
|
else {
|
|
cma_set_compare_data(id_priv->id.ps, addr, &compare_data);
|
|
ret = ib_cm_listen(id_priv->cm_id.ib, svc_id, 0, &compare_data);
|
|
}
|
|
|
|
if (ret) {
|
|
ib_destroy_cm_id(id_priv->cm_id.ib);
|
|
id_priv->cm_id.ib = NULL;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int cma_iw_listen(struct rdma_id_private *id_priv, int backlog)
|
|
{
|
|
int ret;
|
|
struct sockaddr_in *sin;
|
|
struct iw_cm_id *id;
|
|
|
|
id = iw_create_cm_id(id_priv->id.device,
|
|
iw_conn_req_handler,
|
|
id_priv);
|
|
if (IS_ERR(id))
|
|
return PTR_ERR(id);
|
|
|
|
id_priv->cm_id.iw = id;
|
|
|
|
sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
|
|
id_priv->cm_id.iw->local_addr = *sin;
|
|
|
|
ret = iw_cm_listen(id_priv->cm_id.iw, backlog);
|
|
|
|
if (ret) {
|
|
iw_destroy_cm_id(id_priv->cm_id.iw);
|
|
id_priv->cm_id.iw = NULL;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int cma_listen_handler(struct rdma_cm_id *id,
|
|
struct rdma_cm_event *event)
|
|
{
|
|
struct rdma_id_private *id_priv = id->context;
|
|
|
|
id->context = id_priv->id.context;
|
|
id->event_handler = id_priv->id.event_handler;
|
|
return id_priv->id.event_handler(id, event);
|
|
}
|
|
|
|
static void cma_listen_on_dev(struct rdma_id_private *id_priv,
|
|
struct cma_device *cma_dev)
|
|
{
|
|
struct rdma_id_private *dev_id_priv;
|
|
struct rdma_cm_id *id;
|
|
int ret;
|
|
|
|
id = rdma_create_id(cma_listen_handler, id_priv, id_priv->id.ps,
|
|
id_priv->id.qp_type);
|
|
if (IS_ERR(id))
|
|
return;
|
|
|
|
dev_id_priv = container_of(id, struct rdma_id_private, id);
|
|
|
|
dev_id_priv->state = RDMA_CM_ADDR_BOUND;
|
|
memcpy(&id->route.addr.src_addr, &id_priv->id.route.addr.src_addr,
|
|
ip_addr_size((struct sockaddr *) &id_priv->id.route.addr.src_addr));
|
|
|
|
cma_attach_to_dev(dev_id_priv, cma_dev);
|
|
list_add_tail(&dev_id_priv->listen_list, &id_priv->listen_list);
|
|
atomic_inc(&id_priv->refcount);
|
|
dev_id_priv->internal_id = 1;
|
|
|
|
ret = rdma_listen(id, id_priv->backlog);
|
|
if (ret)
|
|
printk(KERN_WARNING "RDMA CMA: cma_listen_on_dev, error %d, "
|
|
"listening on device %s\n", ret, cma_dev->device->name);
|
|
}
|
|
|
|
static void cma_listen_on_all(struct rdma_id_private *id_priv)
|
|
{
|
|
struct cma_device *cma_dev;
|
|
|
|
mutex_lock(&lock);
|
|
list_add_tail(&id_priv->list, &listen_any_list);
|
|
list_for_each_entry(cma_dev, &dev_list, list)
|
|
cma_listen_on_dev(id_priv, cma_dev);
|
|
mutex_unlock(&lock);
|
|
}
|
|
|
|
void rdma_set_service_type(struct rdma_cm_id *id, int tos)
|
|
{
|
|
struct rdma_id_private *id_priv;
|
|
|
|
id_priv = container_of(id, struct rdma_id_private, id);
|
|
id_priv->tos = (u8) tos;
|
|
}
|
|
EXPORT_SYMBOL(rdma_set_service_type);
|
|
|
|
static void cma_query_handler(int status, struct ib_sa_path_rec *path_rec,
|
|
void *context)
|
|
{
|
|
struct cma_work *work = context;
|
|
struct rdma_route *route;
|
|
|
|
route = &work->id->id.route;
|
|
|
|
if (!status) {
|
|
route->num_paths = 1;
|
|
*route->path_rec = *path_rec;
|
|
} else {
|
|
work->old_state = RDMA_CM_ROUTE_QUERY;
|
|
work->new_state = RDMA_CM_ADDR_RESOLVED;
|
|
work->event.event = RDMA_CM_EVENT_ROUTE_ERROR;
|
|
work->event.status = status;
|
|
}
|
|
|
|
queue_work(cma_wq, &work->work);
|
|
}
|
|
|
|
static int cma_query_ib_route(struct rdma_id_private *id_priv, int timeout_ms,
|
|
struct cma_work *work)
|
|
{
|
|
struct rdma_addr *addr = &id_priv->id.route.addr;
|
|
struct ib_sa_path_rec path_rec;
|
|
ib_sa_comp_mask comp_mask;
|
|
struct sockaddr_in6 *sin6;
|
|
|
|
memset(&path_rec, 0, sizeof path_rec);
|
|
rdma_addr_get_sgid(&addr->dev_addr, &path_rec.sgid);
|
|
rdma_addr_get_dgid(&addr->dev_addr, &path_rec.dgid);
|
|
path_rec.pkey = cpu_to_be16(ib_addr_get_pkey(&addr->dev_addr));
|
|
path_rec.numb_path = 1;
|
|
path_rec.reversible = 1;
|
|
path_rec.service_id = cma_get_service_id(id_priv->id.ps,
|
|
(struct sockaddr *) &addr->dst_addr);
|
|
|
|
comp_mask = IB_SA_PATH_REC_DGID | IB_SA_PATH_REC_SGID |
|
|
IB_SA_PATH_REC_PKEY | IB_SA_PATH_REC_NUMB_PATH |
|
|
IB_SA_PATH_REC_REVERSIBLE | IB_SA_PATH_REC_SERVICE_ID;
|
|
|
|
if (addr->src_addr.ss_family == AF_INET) {
|
|
path_rec.qos_class = cpu_to_be16((u16) id_priv->tos);
|
|
comp_mask |= IB_SA_PATH_REC_QOS_CLASS;
|
|
} else {
|
|
sin6 = (struct sockaddr_in6 *) &addr->src_addr;
|
|
path_rec.traffic_class = (u8) (be32_to_cpu(sin6->sin6_flowinfo) >> 20);
|
|
comp_mask |= IB_SA_PATH_REC_TRAFFIC_CLASS;
|
|
}
|
|
|
|
id_priv->query_id = ib_sa_path_rec_get(&sa_client, id_priv->id.device,
|
|
id_priv->id.port_num, &path_rec,
|
|
comp_mask, timeout_ms,
|
|
GFP_KERNEL, cma_query_handler,
|
|
work, &id_priv->query);
|
|
|
|
return (id_priv->query_id < 0) ? id_priv->query_id : 0;
|
|
}
|
|
|
|
static void cma_work_handler(struct work_struct *_work)
|
|
{
|
|
struct cma_work *work = container_of(_work, struct cma_work, work);
|
|
struct rdma_id_private *id_priv = work->id;
|
|
int destroy = 0;
|
|
|
|
mutex_lock(&id_priv->handler_mutex);
|
|
if (!cma_comp_exch(id_priv, work->old_state, work->new_state))
|
|
goto out;
|
|
|
|
if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
|
|
cma_exch(id_priv, RDMA_CM_DESTROYING);
|
|
destroy = 1;
|
|
}
|
|
out:
|
|
mutex_unlock(&id_priv->handler_mutex);
|
|
cma_deref_id(id_priv);
|
|
if (destroy)
|
|
rdma_destroy_id(&id_priv->id);
|
|
kfree(work);
|
|
}
|
|
|
|
static void cma_ndev_work_handler(struct work_struct *_work)
|
|
{
|
|
struct cma_ndev_work *work = container_of(_work, struct cma_ndev_work, work);
|
|
struct rdma_id_private *id_priv = work->id;
|
|
int destroy = 0;
|
|
|
|
mutex_lock(&id_priv->handler_mutex);
|
|
if (id_priv->state == RDMA_CM_DESTROYING ||
|
|
id_priv->state == RDMA_CM_DEVICE_REMOVAL)
|
|
goto out;
|
|
|
|
if (id_priv->id.event_handler(&id_priv->id, &work->event)) {
|
|
cma_exch(id_priv, RDMA_CM_DESTROYING);
|
|
destroy = 1;
|
|
}
|
|
|
|
out:
|
|
mutex_unlock(&id_priv->handler_mutex);
|
|
cma_deref_id(id_priv);
|
|
if (destroy)
|
|
rdma_destroy_id(&id_priv->id);
|
|
kfree(work);
|
|
}
|
|
|
|
static int cma_resolve_ib_route(struct rdma_id_private *id_priv, int timeout_ms)
|
|
{
|
|
struct rdma_route *route = &id_priv->id.route;
|
|
struct cma_work *work;
|
|
int ret;
|
|
|
|
work = kzalloc(sizeof *work, GFP_KERNEL);
|
|
if (!work)
|
|
return -ENOMEM;
|
|
|
|
work->id = id_priv;
|
|
INIT_WORK(&work->work, cma_work_handler);
|
|
work->old_state = RDMA_CM_ROUTE_QUERY;
|
|
work->new_state = RDMA_CM_ROUTE_RESOLVED;
|
|
work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
|
|
|
|
route->path_rec = kmalloc(sizeof *route->path_rec, GFP_KERNEL);
|
|
if (!route->path_rec) {
|
|
ret = -ENOMEM;
|
|
goto err1;
|
|
}
|
|
|
|
ret = cma_query_ib_route(id_priv, timeout_ms, work);
|
|
if (ret)
|
|
goto err2;
|
|
|
|
return 0;
|
|
err2:
|
|
kfree(route->path_rec);
|
|
route->path_rec = NULL;
|
|
err1:
|
|
kfree(work);
|
|
return ret;
|
|
}
|
|
|
|
int rdma_set_ib_paths(struct rdma_cm_id *id,
|
|
struct ib_sa_path_rec *path_rec, int num_paths)
|
|
{
|
|
struct rdma_id_private *id_priv;
|
|
int ret;
|
|
|
|
id_priv = container_of(id, struct rdma_id_private, id);
|
|
if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED,
|
|
RDMA_CM_ROUTE_RESOLVED))
|
|
return -EINVAL;
|
|
|
|
id->route.path_rec = kmemdup(path_rec, sizeof *path_rec * num_paths,
|
|
GFP_KERNEL);
|
|
if (!id->route.path_rec) {
|
|
ret = -ENOMEM;
|
|
goto err;
|
|
}
|
|
|
|
id->route.num_paths = num_paths;
|
|
return 0;
|
|
err:
|
|
cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_ADDR_RESOLVED);
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(rdma_set_ib_paths);
|
|
|
|
static int cma_resolve_iw_route(struct rdma_id_private *id_priv, int timeout_ms)
|
|
{
|
|
struct cma_work *work;
|
|
|
|
work = kzalloc(sizeof *work, GFP_KERNEL);
|
|
if (!work)
|
|
return -ENOMEM;
|
|
|
|
work->id = id_priv;
|
|
INIT_WORK(&work->work, cma_work_handler);
|
|
work->old_state = RDMA_CM_ROUTE_QUERY;
|
|
work->new_state = RDMA_CM_ROUTE_RESOLVED;
|
|
work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
|
|
queue_work(cma_wq, &work->work);
|
|
return 0;
|
|
}
|
|
|
|
static int cma_resolve_iboe_route(struct rdma_id_private *id_priv)
|
|
{
|
|
struct rdma_route *route = &id_priv->id.route;
|
|
struct rdma_addr *addr = &route->addr;
|
|
struct cma_work *work;
|
|
int ret;
|
|
struct sockaddr_in *src_addr = (struct sockaddr_in *)&route->addr.src_addr;
|
|
struct sockaddr_in *dst_addr = (struct sockaddr_in *)&route->addr.dst_addr;
|
|
struct net_device *ndev = NULL;
|
|
u16 vid;
|
|
|
|
if (src_addr->sin_family != dst_addr->sin_family)
|
|
return -EINVAL;
|
|
|
|
work = kzalloc(sizeof *work, GFP_KERNEL);
|
|
if (!work)
|
|
return -ENOMEM;
|
|
|
|
work->id = id_priv;
|
|
INIT_WORK(&work->work, cma_work_handler);
|
|
|
|
route->path_rec = kzalloc(sizeof *route->path_rec, GFP_KERNEL);
|
|
if (!route->path_rec) {
|
|
ret = -ENOMEM;
|
|
goto err1;
|
|
}
|
|
|
|
route->num_paths = 1;
|
|
|
|
if (addr->dev_addr.bound_dev_if)
|
|
ndev = dev_get_by_index(&init_net, addr->dev_addr.bound_dev_if);
|
|
if (!ndev) {
|
|
ret = -ENODEV;
|
|
goto err2;
|
|
}
|
|
|
|
vid = rdma_vlan_dev_vlan_id(ndev);
|
|
|
|
iboe_mac_vlan_to_ll(&route->path_rec->sgid, addr->dev_addr.src_dev_addr, vid);
|
|
iboe_mac_vlan_to_ll(&route->path_rec->dgid, addr->dev_addr.dst_dev_addr, vid);
|
|
|
|
route->path_rec->hop_limit = 1;
|
|
route->path_rec->reversible = 1;
|
|
route->path_rec->pkey = cpu_to_be16(0xffff);
|
|
route->path_rec->mtu_selector = IB_SA_EQ;
|
|
route->path_rec->sl = netdev_get_prio_tc_map(
|
|
ndev->priv_flags & IFF_802_1Q_VLAN ?
|
|
vlan_dev_real_dev(ndev) : ndev,
|
|
rt_tos2priority(id_priv->tos));
|
|
|
|
route->path_rec->mtu = iboe_get_mtu(ndev->mtu);
|
|
route->path_rec->rate_selector = IB_SA_EQ;
|
|
route->path_rec->rate = iboe_get_rate(ndev);
|
|
dev_put(ndev);
|
|
route->path_rec->packet_life_time_selector = IB_SA_EQ;
|
|
route->path_rec->packet_life_time = CMA_IBOE_PACKET_LIFETIME;
|
|
if (!route->path_rec->mtu) {
|
|
ret = -EINVAL;
|
|
goto err2;
|
|
}
|
|
|
|
work->old_state = RDMA_CM_ROUTE_QUERY;
|
|
work->new_state = RDMA_CM_ROUTE_RESOLVED;
|
|
work->event.event = RDMA_CM_EVENT_ROUTE_RESOLVED;
|
|
work->event.status = 0;
|
|
|
|
queue_work(cma_wq, &work->work);
|
|
|
|
return 0;
|
|
|
|
err2:
|
|
kfree(route->path_rec);
|
|
route->path_rec = NULL;
|
|
err1:
|
|
kfree(work);
|
|
return ret;
|
|
}
|
|
|
|
int rdma_resolve_route(struct rdma_cm_id *id, int timeout_ms)
|
|
{
|
|
struct rdma_id_private *id_priv;
|
|
int ret;
|
|
|
|
id_priv = container_of(id, struct rdma_id_private, id);
|
|
if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED, RDMA_CM_ROUTE_QUERY))
|
|
return -EINVAL;
|
|
|
|
atomic_inc(&id_priv->refcount);
|
|
switch (rdma_node_get_transport(id->device->node_type)) {
|
|
case RDMA_TRANSPORT_IB:
|
|
switch (rdma_port_get_link_layer(id->device, id->port_num)) {
|
|
case IB_LINK_LAYER_INFINIBAND:
|
|
ret = cma_resolve_ib_route(id_priv, timeout_ms);
|
|
break;
|
|
case IB_LINK_LAYER_ETHERNET:
|
|
ret = cma_resolve_iboe_route(id_priv);
|
|
break;
|
|
default:
|
|
ret = -ENOSYS;
|
|
}
|
|
break;
|
|
case RDMA_TRANSPORT_IWARP:
|
|
ret = cma_resolve_iw_route(id_priv, timeout_ms);
|
|
break;
|
|
default:
|
|
ret = -ENOSYS;
|
|
break;
|
|
}
|
|
if (ret)
|
|
goto err;
|
|
|
|
return 0;
|
|
err:
|
|
cma_comp_exch(id_priv, RDMA_CM_ROUTE_QUERY, RDMA_CM_ADDR_RESOLVED);
|
|
cma_deref_id(id_priv);
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(rdma_resolve_route);
|
|
|
|
static int cma_bind_loopback(struct rdma_id_private *id_priv)
|
|
{
|
|
struct cma_device *cma_dev;
|
|
struct ib_port_attr port_attr;
|
|
union ib_gid gid;
|
|
u16 pkey;
|
|
int ret;
|
|
u8 p;
|
|
|
|
mutex_lock(&lock);
|
|
if (list_empty(&dev_list)) {
|
|
ret = -ENODEV;
|
|
goto out;
|
|
}
|
|
list_for_each_entry(cma_dev, &dev_list, list)
|
|
for (p = 1; p <= cma_dev->device->phys_port_cnt; ++p)
|
|
if (!ib_query_port(cma_dev->device, p, &port_attr) &&
|
|
port_attr.state == IB_PORT_ACTIVE)
|
|
goto port_found;
|
|
|
|
p = 1;
|
|
cma_dev = list_entry(dev_list.next, struct cma_device, list);
|
|
|
|
port_found:
|
|
ret = ib_get_cached_gid(cma_dev->device, p, 0, &gid);
|
|
if (ret)
|
|
goto out;
|
|
|
|
ret = ib_get_cached_pkey(cma_dev->device, p, 0, &pkey);
|
|
if (ret)
|
|
goto out;
|
|
|
|
id_priv->id.route.addr.dev_addr.dev_type =
|
|
(rdma_port_get_link_layer(cma_dev->device, p) == IB_LINK_LAYER_INFINIBAND) ?
|
|
ARPHRD_INFINIBAND : ARPHRD_ETHER;
|
|
|
|
rdma_addr_set_sgid(&id_priv->id.route.addr.dev_addr, &gid);
|
|
ib_addr_set_pkey(&id_priv->id.route.addr.dev_addr, pkey);
|
|
id_priv->id.port_num = p;
|
|
cma_attach_to_dev(id_priv, cma_dev);
|
|
out:
|
|
mutex_unlock(&lock);
|
|
return ret;
|
|
}
|
|
|
|
static void addr_handler(int status, struct sockaddr *src_addr,
|
|
struct rdma_dev_addr *dev_addr, void *context)
|
|
{
|
|
struct rdma_id_private *id_priv = context;
|
|
struct rdma_cm_event event;
|
|
|
|
memset(&event, 0, sizeof event);
|
|
mutex_lock(&id_priv->handler_mutex);
|
|
if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY,
|
|
RDMA_CM_ADDR_RESOLVED))
|
|
goto out;
|
|
|
|
if (!status && !id_priv->cma_dev)
|
|
status = cma_acquire_dev(id_priv);
|
|
|
|
if (status) {
|
|
if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_RESOLVED,
|
|
RDMA_CM_ADDR_BOUND))
|
|
goto out;
|
|
event.event = RDMA_CM_EVENT_ADDR_ERROR;
|
|
event.status = status;
|
|
} else {
|
|
memcpy(&id_priv->id.route.addr.src_addr, src_addr,
|
|
ip_addr_size(src_addr));
|
|
event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
|
|
}
|
|
|
|
if (id_priv->id.event_handler(&id_priv->id, &event)) {
|
|
cma_exch(id_priv, RDMA_CM_DESTROYING);
|
|
mutex_unlock(&id_priv->handler_mutex);
|
|
cma_deref_id(id_priv);
|
|
rdma_destroy_id(&id_priv->id);
|
|
return;
|
|
}
|
|
out:
|
|
mutex_unlock(&id_priv->handler_mutex);
|
|
cma_deref_id(id_priv);
|
|
}
|
|
|
|
static int cma_resolve_loopback(struct rdma_id_private *id_priv)
|
|
{
|
|
struct cma_work *work;
|
|
struct sockaddr *src, *dst;
|
|
union ib_gid gid;
|
|
int ret;
|
|
|
|
work = kzalloc(sizeof *work, GFP_KERNEL);
|
|
if (!work)
|
|
return -ENOMEM;
|
|
|
|
if (!id_priv->cma_dev) {
|
|
ret = cma_bind_loopback(id_priv);
|
|
if (ret)
|
|
goto err;
|
|
}
|
|
|
|
rdma_addr_get_sgid(&id_priv->id.route.addr.dev_addr, &gid);
|
|
rdma_addr_set_dgid(&id_priv->id.route.addr.dev_addr, &gid);
|
|
|
|
src = (struct sockaddr *) &id_priv->id.route.addr.src_addr;
|
|
if (cma_zero_addr(src)) {
|
|
dst = (struct sockaddr *) &id_priv->id.route.addr.dst_addr;
|
|
if ((src->sa_family = dst->sa_family) == AF_INET) {
|
|
((struct sockaddr_in *)src)->sin_addr =
|
|
((struct sockaddr_in *)dst)->sin_addr;
|
|
} else {
|
|
((struct sockaddr_in6 *)src)->sin6_addr =
|
|
((struct sockaddr_in6 *)dst)->sin6_addr;
|
|
}
|
|
}
|
|
|
|
work->id = id_priv;
|
|
INIT_WORK(&work->work, cma_work_handler);
|
|
work->old_state = RDMA_CM_ADDR_QUERY;
|
|
work->new_state = RDMA_CM_ADDR_RESOLVED;
|
|
work->event.event = RDMA_CM_EVENT_ADDR_RESOLVED;
|
|
queue_work(cma_wq, &work->work);
|
|
return 0;
|
|
err:
|
|
kfree(work);
|
|
return ret;
|
|
}
|
|
|
|
static int cma_bind_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
|
|
struct sockaddr *dst_addr)
|
|
{
|
|
if (!src_addr || !src_addr->sa_family) {
|
|
src_addr = (struct sockaddr *) &id->route.addr.src_addr;
|
|
if ((src_addr->sa_family = dst_addr->sa_family) == AF_INET6) {
|
|
((struct sockaddr_in6 *) src_addr)->sin6_scope_id =
|
|
((struct sockaddr_in6 *) dst_addr)->sin6_scope_id;
|
|
}
|
|
}
|
|
return rdma_bind_addr(id, src_addr);
|
|
}
|
|
|
|
int rdma_resolve_addr(struct rdma_cm_id *id, struct sockaddr *src_addr,
|
|
struct sockaddr *dst_addr, int timeout_ms)
|
|
{
|
|
struct rdma_id_private *id_priv;
|
|
int ret;
|
|
|
|
id_priv = container_of(id, struct rdma_id_private, id);
|
|
if (id_priv->state == RDMA_CM_IDLE) {
|
|
ret = cma_bind_addr(id, src_addr, dst_addr);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_ADDR_QUERY))
|
|
return -EINVAL;
|
|
|
|
atomic_inc(&id_priv->refcount);
|
|
memcpy(&id->route.addr.dst_addr, dst_addr, ip_addr_size(dst_addr));
|
|
if (cma_any_addr(dst_addr))
|
|
ret = cma_resolve_loopback(id_priv);
|
|
else
|
|
ret = rdma_resolve_ip(&addr_client, (struct sockaddr *) &id->route.addr.src_addr,
|
|
dst_addr, &id->route.addr.dev_addr,
|
|
timeout_ms, addr_handler, id_priv);
|
|
if (ret)
|
|
goto err;
|
|
|
|
return 0;
|
|
err:
|
|
cma_comp_exch(id_priv, RDMA_CM_ADDR_QUERY, RDMA_CM_ADDR_BOUND);
|
|
cma_deref_id(id_priv);
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(rdma_resolve_addr);
|
|
|
|
int rdma_set_reuseaddr(struct rdma_cm_id *id, int reuse)
|
|
{
|
|
struct rdma_id_private *id_priv;
|
|
unsigned long flags;
|
|
int ret;
|
|
|
|
id_priv = container_of(id, struct rdma_id_private, id);
|
|
spin_lock_irqsave(&id_priv->lock, flags);
|
|
if (id_priv->state == RDMA_CM_IDLE) {
|
|
id_priv->reuseaddr = reuse;
|
|
ret = 0;
|
|
} else {
|
|
ret = -EINVAL;
|
|
}
|
|
spin_unlock_irqrestore(&id_priv->lock, flags);
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(rdma_set_reuseaddr);
|
|
|
|
static void cma_bind_port(struct rdma_bind_list *bind_list,
|
|
struct rdma_id_private *id_priv)
|
|
{
|
|
struct sockaddr_in *sin;
|
|
|
|
sin = (struct sockaddr_in *) &id_priv->id.route.addr.src_addr;
|
|
sin->sin_port = htons(bind_list->port);
|
|
id_priv->bind_list = bind_list;
|
|
hlist_add_head(&id_priv->node, &bind_list->owners);
|
|
}
|
|
|
|
static int cma_alloc_port(struct idr *ps, struct rdma_id_private *id_priv,
|
|
unsigned short snum)
|
|
{
|
|
struct rdma_bind_list *bind_list;
|
|
int port, ret;
|
|
|
|
bind_list = kzalloc(sizeof *bind_list, GFP_KERNEL);
|
|
if (!bind_list)
|
|
return -ENOMEM;
|
|
|
|
do {
|
|
ret = idr_get_new_above(ps, bind_list, snum, &port);
|
|
} while ((ret == -EAGAIN) && idr_pre_get(ps, GFP_KERNEL));
|
|
|
|
if (ret)
|
|
goto err1;
|
|
|
|
if (port != snum) {
|
|
ret = -EADDRNOTAVAIL;
|
|
goto err2;
|
|
}
|
|
|
|
bind_list->ps = ps;
|
|
bind_list->port = (unsigned short) port;
|
|
cma_bind_port(bind_list, id_priv);
|
|
return 0;
|
|
err2:
|
|
idr_remove(ps, port);
|
|
err1:
|
|
kfree(bind_list);
|
|
return ret;
|
|
}
|
|
|
|
static int cma_alloc_any_port(struct idr *ps, struct rdma_id_private *id_priv)
|
|
{
|
|
static unsigned int last_used_port;
|
|
int low, high, remaining;
|
|
unsigned int rover;
|
|
|
|
inet_get_local_port_range(&low, &high);
|
|
remaining = (high - low) + 1;
|
|
rover = net_random() % remaining + low;
|
|
retry:
|
|
if (last_used_port != rover &&
|
|
!idr_find(ps, (unsigned short) rover)) {
|
|
int ret = cma_alloc_port(ps, id_priv, rover);
|
|
/*
|
|
* Remember previously used port number in order to avoid
|
|
* re-using same port immediately after it is closed.
|
|
*/
|
|
if (!ret)
|
|
last_used_port = rover;
|
|
if (ret != -EADDRNOTAVAIL)
|
|
return ret;
|
|
}
|
|
if (--remaining) {
|
|
rover++;
|
|
if ((rover < low) || (rover > high))
|
|
rover = low;
|
|
goto retry;
|
|
}
|
|
return -EADDRNOTAVAIL;
|
|
}
|
|
|
|
/*
|
|
* Check that the requested port is available. This is called when trying to
|
|
* bind to a specific port, or when trying to listen on a bound port. In
|
|
* the latter case, the provided id_priv may already be on the bind_list, but
|
|
* we still need to check that it's okay to start listening.
|
|
*/
|
|
static int cma_check_port(struct rdma_bind_list *bind_list,
|
|
struct rdma_id_private *id_priv, uint8_t reuseaddr)
|
|
{
|
|
struct rdma_id_private *cur_id;
|
|
struct sockaddr *addr, *cur_addr;
|
|
struct hlist_node *node;
|
|
|
|
addr = (struct sockaddr *) &id_priv->id.route.addr.src_addr;
|
|
if (cma_any_addr(addr) && !reuseaddr)
|
|
return -EADDRNOTAVAIL;
|
|
|
|
hlist_for_each_entry(cur_id, node, &bind_list->owners, node) {
|
|
if (id_priv == cur_id)
|
|
continue;
|
|
|
|
if ((cur_id->state == RDMA_CM_LISTEN) ||
|
|
!reuseaddr || !cur_id->reuseaddr) {
|
|
cur_addr = (struct sockaddr *) &cur_id->id.route.addr.src_addr;
|
|
if (cma_any_addr(cur_addr))
|
|
return -EADDRNOTAVAIL;
|
|
|
|
if (!cma_addr_cmp(addr, cur_addr))
|
|
return -EADDRINUSE;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int cma_use_port(struct idr *ps, struct rdma_id_private *id_priv)
|
|
{
|
|
struct rdma_bind_list *bind_list;
|
|
unsigned short snum;
|
|
int ret;
|
|
|
|
snum = ntohs(cma_port((struct sockaddr *) &id_priv->id.route.addr.src_addr));
|
|
if (snum < PROT_SOCK && !capable(CAP_NET_BIND_SERVICE))
|
|
return -EACCES;
|
|
|
|
bind_list = idr_find(ps, snum);
|
|
if (!bind_list) {
|
|
ret = cma_alloc_port(ps, id_priv, snum);
|
|
} else {
|
|
ret = cma_check_port(bind_list, id_priv, id_priv->reuseaddr);
|
|
if (!ret)
|
|
cma_bind_port(bind_list, id_priv);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static int cma_bind_listen(struct rdma_id_private *id_priv)
|
|
{
|
|
struct rdma_bind_list *bind_list = id_priv->bind_list;
|
|
int ret = 0;
|
|
|
|
mutex_lock(&lock);
|
|
if (bind_list->owners.first->next)
|
|
ret = cma_check_port(bind_list, id_priv, 0);
|
|
mutex_unlock(&lock);
|
|
return ret;
|
|
}
|
|
|
|
static int cma_get_port(struct rdma_id_private *id_priv)
|
|
{
|
|
struct idr *ps;
|
|
int ret;
|
|
|
|
switch (id_priv->id.ps) {
|
|
case RDMA_PS_SDP:
|
|
ps = &sdp_ps;
|
|
break;
|
|
case RDMA_PS_TCP:
|
|
ps = &tcp_ps;
|
|
break;
|
|
case RDMA_PS_UDP:
|
|
ps = &udp_ps;
|
|
break;
|
|
case RDMA_PS_IPOIB:
|
|
ps = &ipoib_ps;
|
|
break;
|
|
case RDMA_PS_IB:
|
|
ps = &ib_ps;
|
|
break;
|
|
default:
|
|
return -EPROTONOSUPPORT;
|
|
}
|
|
|
|
mutex_lock(&lock);
|
|
if (cma_any_port((struct sockaddr *) &id_priv->id.route.addr.src_addr))
|
|
ret = cma_alloc_any_port(ps, id_priv);
|
|
else
|
|
ret = cma_use_port(ps, id_priv);
|
|
mutex_unlock(&lock);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int cma_check_linklocal(struct rdma_dev_addr *dev_addr,
|
|
struct sockaddr *addr)
|
|
{
|
|
#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
|
|
struct sockaddr_in6 *sin6;
|
|
|
|
if (addr->sa_family != AF_INET6)
|
|
return 0;
|
|
|
|
sin6 = (struct sockaddr_in6 *) addr;
|
|
if ((ipv6_addr_type(&sin6->sin6_addr) & IPV6_ADDR_LINKLOCAL) &&
|
|
!sin6->sin6_scope_id)
|
|
return -EINVAL;
|
|
|
|
dev_addr->bound_dev_if = sin6->sin6_scope_id;
|
|
#endif
|
|
return 0;
|
|
}
|
|
|
|
int rdma_listen(struct rdma_cm_id *id, int backlog)
|
|
{
|
|
struct rdma_id_private *id_priv;
|
|
int ret;
|
|
|
|
id_priv = container_of(id, struct rdma_id_private, id);
|
|
if (id_priv->state == RDMA_CM_IDLE) {
|
|
((struct sockaddr *) &id->route.addr.src_addr)->sa_family = AF_INET;
|
|
ret = rdma_bind_addr(id, (struct sockaddr *) &id->route.addr.src_addr);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
if (!cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_LISTEN))
|
|
return -EINVAL;
|
|
|
|
if (id_priv->reuseaddr) {
|
|
ret = cma_bind_listen(id_priv);
|
|
if (ret)
|
|
goto err;
|
|
}
|
|
|
|
id_priv->backlog = backlog;
|
|
if (id->device) {
|
|
switch (rdma_node_get_transport(id->device->node_type)) {
|
|
case RDMA_TRANSPORT_IB:
|
|
ret = cma_ib_listen(id_priv);
|
|
if (ret)
|
|
goto err;
|
|
break;
|
|
case RDMA_TRANSPORT_IWARP:
|
|
ret = cma_iw_listen(id_priv, backlog);
|
|
if (ret)
|
|
goto err;
|
|
break;
|
|
default:
|
|
ret = -ENOSYS;
|
|
goto err;
|
|
}
|
|
} else
|
|
cma_listen_on_all(id_priv);
|
|
|
|
return 0;
|
|
err:
|
|
id_priv->backlog = 0;
|
|
cma_comp_exch(id_priv, RDMA_CM_LISTEN, RDMA_CM_ADDR_BOUND);
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(rdma_listen);
|
|
|
|
int rdma_bind_addr(struct rdma_cm_id *id, struct sockaddr *addr)
|
|
{
|
|
struct rdma_id_private *id_priv;
|
|
int ret;
|
|
|
|
if (addr->sa_family != AF_INET && addr->sa_family != AF_INET6)
|
|
return -EAFNOSUPPORT;
|
|
|
|
id_priv = container_of(id, struct rdma_id_private, id);
|
|
if (!cma_comp_exch(id_priv, RDMA_CM_IDLE, RDMA_CM_ADDR_BOUND))
|
|
return -EINVAL;
|
|
|
|
ret = cma_check_linklocal(&id->route.addr.dev_addr, addr);
|
|
if (ret)
|
|
goto err1;
|
|
|
|
if (!cma_any_addr(addr)) {
|
|
ret = rdma_translate_ip(addr, &id->route.addr.dev_addr);
|
|
if (ret)
|
|
goto err1;
|
|
|
|
ret = cma_acquire_dev(id_priv);
|
|
if (ret)
|
|
goto err1;
|
|
}
|
|
|
|
memcpy(&id->route.addr.src_addr, addr, ip_addr_size(addr));
|
|
ret = cma_get_port(id_priv);
|
|
if (ret)
|
|
goto err2;
|
|
|
|
return 0;
|
|
err2:
|
|
if (id_priv->cma_dev)
|
|
cma_release_dev(id_priv);
|
|
err1:
|
|
cma_comp_exch(id_priv, RDMA_CM_ADDR_BOUND, RDMA_CM_IDLE);
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(rdma_bind_addr);
|
|
|
|
static int cma_format_hdr(void *hdr, enum rdma_port_space ps,
|
|
struct rdma_route *route)
|
|
{
|
|
struct cma_hdr *cma_hdr;
|
|
struct sdp_hh *sdp_hdr;
|
|
|
|
if (route->addr.src_addr.ss_family == AF_INET) {
|
|
struct sockaddr_in *src4, *dst4;
|
|
|
|
src4 = (struct sockaddr_in *) &route->addr.src_addr;
|
|
dst4 = (struct sockaddr_in *) &route->addr.dst_addr;
|
|
|
|
switch (ps) {
|
|
case RDMA_PS_SDP:
|
|
sdp_hdr = hdr;
|
|
if (sdp_get_majv(sdp_hdr->sdp_version) != SDP_MAJ_VERSION)
|
|
return -EINVAL;
|
|
sdp_set_ip_ver(sdp_hdr, 4);
|
|
sdp_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr;
|
|
sdp_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr;
|
|
sdp_hdr->port = src4->sin_port;
|
|
break;
|
|
default:
|
|
cma_hdr = hdr;
|
|
cma_hdr->cma_version = CMA_VERSION;
|
|
cma_set_ip_ver(cma_hdr, 4);
|
|
cma_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr;
|
|
cma_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr;
|
|
cma_hdr->port = src4->sin_port;
|
|
break;
|
|
}
|
|
} else {
|
|
struct sockaddr_in6 *src6, *dst6;
|
|
|
|
src6 = (struct sockaddr_in6 *) &route->addr.src_addr;
|
|
dst6 = (struct sockaddr_in6 *) &route->addr.dst_addr;
|
|
|
|
switch (ps) {
|
|
case RDMA_PS_SDP:
|
|
sdp_hdr = hdr;
|
|
if (sdp_get_majv(sdp_hdr->sdp_version) != SDP_MAJ_VERSION)
|
|
return -EINVAL;
|
|
sdp_set_ip_ver(sdp_hdr, 6);
|
|
sdp_hdr->src_addr.ip6 = src6->sin6_addr;
|
|
sdp_hdr->dst_addr.ip6 = dst6->sin6_addr;
|
|
sdp_hdr->port = src6->sin6_port;
|
|
break;
|
|
default:
|
|
cma_hdr = hdr;
|
|
cma_hdr->cma_version = CMA_VERSION;
|
|
cma_set_ip_ver(cma_hdr, 6);
|
|
cma_hdr->src_addr.ip6 = src6->sin6_addr;
|
|
cma_hdr->dst_addr.ip6 = dst6->sin6_addr;
|
|
cma_hdr->port = src6->sin6_port;
|
|
break;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int cma_sidr_rep_handler(struct ib_cm_id *cm_id,
|
|
struct ib_cm_event *ib_event)
|
|
{
|
|
struct rdma_id_private *id_priv = cm_id->context;
|
|
struct rdma_cm_event event;
|
|
struct ib_cm_sidr_rep_event_param *rep = &ib_event->param.sidr_rep_rcvd;
|
|
int ret = 0;
|
|
|
|
if (cma_disable_callback(id_priv, RDMA_CM_CONNECT))
|
|
return 0;
|
|
|
|
memset(&event, 0, sizeof event);
|
|
switch (ib_event->event) {
|
|
case IB_CM_SIDR_REQ_ERROR:
|
|
event.event = RDMA_CM_EVENT_UNREACHABLE;
|
|
event.status = -ETIMEDOUT;
|
|
break;
|
|
case IB_CM_SIDR_REP_RECEIVED:
|
|
event.param.ud.private_data = ib_event->private_data;
|
|
event.param.ud.private_data_len = IB_CM_SIDR_REP_PRIVATE_DATA_SIZE;
|
|
if (rep->status != IB_SIDR_SUCCESS) {
|
|
event.event = RDMA_CM_EVENT_UNREACHABLE;
|
|
event.status = ib_event->param.sidr_rep_rcvd.status;
|
|
break;
|
|
}
|
|
ret = cma_set_qkey(id_priv);
|
|
if (ret) {
|
|
event.event = RDMA_CM_EVENT_ADDR_ERROR;
|
|
event.status = -EINVAL;
|
|
break;
|
|
}
|
|
if (id_priv->qkey != rep->qkey) {
|
|
event.event = RDMA_CM_EVENT_UNREACHABLE;
|
|
event.status = -EINVAL;
|
|
break;
|
|
}
|
|
ib_init_ah_from_path(id_priv->id.device, id_priv->id.port_num,
|
|
id_priv->id.route.path_rec,
|
|
&event.param.ud.ah_attr);
|
|
event.param.ud.qp_num = rep->qpn;
|
|
event.param.ud.qkey = rep->qkey;
|
|
event.event = RDMA_CM_EVENT_ESTABLISHED;
|
|
event.status = 0;
|
|
break;
|
|
default:
|
|
printk(KERN_ERR "RDMA CMA: unexpected IB CM event: %d\n",
|
|
ib_event->event);
|
|
goto out;
|
|
}
|
|
|
|
ret = id_priv->id.event_handler(&id_priv->id, &event);
|
|
if (ret) {
|
|
/* Destroy the CM ID by returning a non-zero value. */
|
|
id_priv->cm_id.ib = NULL;
|
|
cma_exch(id_priv, RDMA_CM_DESTROYING);
|
|
mutex_unlock(&id_priv->handler_mutex);
|
|
rdma_destroy_id(&id_priv->id);
|
|
return ret;
|
|
}
|
|
out:
|
|
mutex_unlock(&id_priv->handler_mutex);
|
|
return ret;
|
|
}
|
|
|
|
static int cma_resolve_ib_udp(struct rdma_id_private *id_priv,
|
|
struct rdma_conn_param *conn_param)
|
|
{
|
|
struct ib_cm_sidr_req_param req;
|
|
struct rdma_route *route;
|
|
struct ib_cm_id *id;
|
|
int ret;
|
|
|
|
req.private_data_len = sizeof(struct cma_hdr) +
|
|
conn_param->private_data_len;
|
|
if (req.private_data_len < conn_param->private_data_len)
|
|
return -EINVAL;
|
|
|
|
req.private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
|
|
if (!req.private_data)
|
|
return -ENOMEM;
|
|
|
|
if (conn_param->private_data && conn_param->private_data_len)
|
|
memcpy((void *) req.private_data + sizeof(struct cma_hdr),
|
|
conn_param->private_data, conn_param->private_data_len);
|
|
|
|
route = &id_priv->id.route;
|
|
ret = cma_format_hdr((void *) req.private_data, id_priv->id.ps, route);
|
|
if (ret)
|
|
goto out;
|
|
|
|
id = ib_create_cm_id(id_priv->id.device, cma_sidr_rep_handler,
|
|
id_priv);
|
|
if (IS_ERR(id)) {
|
|
ret = PTR_ERR(id);
|
|
goto out;
|
|
}
|
|
id_priv->cm_id.ib = id;
|
|
|
|
req.path = route->path_rec;
|
|
req.service_id = cma_get_service_id(id_priv->id.ps,
|
|
(struct sockaddr *) &route->addr.dst_addr);
|
|
req.timeout_ms = 1 << (CMA_CM_RESPONSE_TIMEOUT - 8);
|
|
req.max_cm_retries = CMA_MAX_CM_RETRIES;
|
|
|
|
ret = ib_send_cm_sidr_req(id_priv->cm_id.ib, &req);
|
|
if (ret) {
|
|
ib_destroy_cm_id(id_priv->cm_id.ib);
|
|
id_priv->cm_id.ib = NULL;
|
|
}
|
|
out:
|
|
kfree(req.private_data);
|
|
return ret;
|
|
}
|
|
|
|
static int cma_connect_ib(struct rdma_id_private *id_priv,
|
|
struct rdma_conn_param *conn_param)
|
|
{
|
|
struct ib_cm_req_param req;
|
|
struct rdma_route *route;
|
|
void *private_data;
|
|
struct ib_cm_id *id;
|
|
int offset, ret;
|
|
|
|
memset(&req, 0, sizeof req);
|
|
offset = cma_user_data_offset(id_priv->id.ps);
|
|
req.private_data_len = offset + conn_param->private_data_len;
|
|
if (req.private_data_len < conn_param->private_data_len)
|
|
return -EINVAL;
|
|
|
|
private_data = kzalloc(req.private_data_len, GFP_ATOMIC);
|
|
if (!private_data)
|
|
return -ENOMEM;
|
|
|
|
if (conn_param->private_data && conn_param->private_data_len)
|
|
memcpy(private_data + offset, conn_param->private_data,
|
|
conn_param->private_data_len);
|
|
|
|
id = ib_create_cm_id(id_priv->id.device, cma_ib_handler, id_priv);
|
|
if (IS_ERR(id)) {
|
|
ret = PTR_ERR(id);
|
|
goto out;
|
|
}
|
|
id_priv->cm_id.ib = id;
|
|
|
|
route = &id_priv->id.route;
|
|
ret = cma_format_hdr(private_data, id_priv->id.ps, route);
|
|
if (ret)
|
|
goto out;
|
|
req.private_data = private_data;
|
|
|
|
req.primary_path = &route->path_rec[0];
|
|
if (route->num_paths == 2)
|
|
req.alternate_path = &route->path_rec[1];
|
|
|
|
req.service_id = cma_get_service_id(id_priv->id.ps,
|
|
(struct sockaddr *) &route->addr.dst_addr);
|
|
req.qp_num = id_priv->qp_num;
|
|
req.qp_type = id_priv->id.qp_type;
|
|
req.starting_psn = id_priv->seq_num;
|
|
req.responder_resources = conn_param->responder_resources;
|
|
req.initiator_depth = conn_param->initiator_depth;
|
|
req.flow_control = conn_param->flow_control;
|
|
req.retry_count = conn_param->retry_count;
|
|
req.rnr_retry_count = conn_param->rnr_retry_count;
|
|
req.remote_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
|
|
req.local_cm_response_timeout = CMA_CM_RESPONSE_TIMEOUT;
|
|
req.max_cm_retries = CMA_MAX_CM_RETRIES;
|
|
req.srq = id_priv->srq ? 1 : 0;
|
|
|
|
ret = ib_send_cm_req(id_priv->cm_id.ib, &req);
|
|
out:
|
|
if (ret && !IS_ERR(id)) {
|
|
ib_destroy_cm_id(id);
|
|
id_priv->cm_id.ib = NULL;
|
|
}
|
|
|
|
kfree(private_data);
|
|
return ret;
|
|
}
|
|
|
|
static int cma_connect_iw(struct rdma_id_private *id_priv,
|
|
struct rdma_conn_param *conn_param)
|
|
{
|
|
struct iw_cm_id *cm_id;
|
|
struct sockaddr_in* sin;
|
|
int ret;
|
|
struct iw_cm_conn_param iw_param;
|
|
|
|
cm_id = iw_create_cm_id(id_priv->id.device, cma_iw_handler, id_priv);
|
|
if (IS_ERR(cm_id))
|
|
return PTR_ERR(cm_id);
|
|
|
|
id_priv->cm_id.iw = cm_id;
|
|
|
|
sin = (struct sockaddr_in*) &id_priv->id.route.addr.src_addr;
|
|
cm_id->local_addr = *sin;
|
|
|
|
sin = (struct sockaddr_in*) &id_priv->id.route.addr.dst_addr;
|
|
cm_id->remote_addr = *sin;
|
|
|
|
ret = cma_modify_qp_rtr(id_priv, conn_param);
|
|
if (ret)
|
|
goto out;
|
|
|
|
if (conn_param) {
|
|
iw_param.ord = conn_param->initiator_depth;
|
|
iw_param.ird = conn_param->responder_resources;
|
|
iw_param.private_data = conn_param->private_data;
|
|
iw_param.private_data_len = conn_param->private_data_len;
|
|
iw_param.qpn = id_priv->id.qp ? id_priv->qp_num : conn_param->qp_num;
|
|
} else {
|
|
memset(&iw_param, 0, sizeof iw_param);
|
|
iw_param.qpn = id_priv->qp_num;
|
|
}
|
|
ret = iw_cm_connect(cm_id, &iw_param);
|
|
out:
|
|
if (ret) {
|
|
iw_destroy_cm_id(cm_id);
|
|
id_priv->cm_id.iw = NULL;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
int rdma_connect(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
|
|
{
|
|
struct rdma_id_private *id_priv;
|
|
int ret;
|
|
|
|
id_priv = container_of(id, struct rdma_id_private, id);
|
|
if (!cma_comp_exch(id_priv, RDMA_CM_ROUTE_RESOLVED, RDMA_CM_CONNECT))
|
|
return -EINVAL;
|
|
|
|
if (!id->qp) {
|
|
id_priv->qp_num = conn_param->qp_num;
|
|
id_priv->srq = conn_param->srq;
|
|
}
|
|
|
|
switch (rdma_node_get_transport(id->device->node_type)) {
|
|
case RDMA_TRANSPORT_IB:
|
|
if (id->qp_type == IB_QPT_UD)
|
|
ret = cma_resolve_ib_udp(id_priv, conn_param);
|
|
else
|
|
ret = cma_connect_ib(id_priv, conn_param);
|
|
break;
|
|
case RDMA_TRANSPORT_IWARP:
|
|
ret = cma_connect_iw(id_priv, conn_param);
|
|
break;
|
|
default:
|
|
ret = -ENOSYS;
|
|
break;
|
|
}
|
|
if (ret)
|
|
goto err;
|
|
|
|
return 0;
|
|
err:
|
|
cma_comp_exch(id_priv, RDMA_CM_CONNECT, RDMA_CM_ROUTE_RESOLVED);
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(rdma_connect);
|
|
|
|
static int cma_accept_ib(struct rdma_id_private *id_priv,
|
|
struct rdma_conn_param *conn_param)
|
|
{
|
|
struct ib_cm_rep_param rep;
|
|
int ret;
|
|
|
|
ret = cma_modify_qp_rtr(id_priv, conn_param);
|
|
if (ret)
|
|
goto out;
|
|
|
|
ret = cma_modify_qp_rts(id_priv, conn_param);
|
|
if (ret)
|
|
goto out;
|
|
|
|
memset(&rep, 0, sizeof rep);
|
|
rep.qp_num = id_priv->qp_num;
|
|
rep.starting_psn = id_priv->seq_num;
|
|
rep.private_data = conn_param->private_data;
|
|
rep.private_data_len = conn_param->private_data_len;
|
|
rep.responder_resources = conn_param->responder_resources;
|
|
rep.initiator_depth = conn_param->initiator_depth;
|
|
rep.failover_accepted = 0;
|
|
rep.flow_control = conn_param->flow_control;
|
|
rep.rnr_retry_count = conn_param->rnr_retry_count;
|
|
rep.srq = id_priv->srq ? 1 : 0;
|
|
|
|
ret = ib_send_cm_rep(id_priv->cm_id.ib, &rep);
|
|
out:
|
|
return ret;
|
|
}
|
|
|
|
static int cma_accept_iw(struct rdma_id_private *id_priv,
|
|
struct rdma_conn_param *conn_param)
|
|
{
|
|
struct iw_cm_conn_param iw_param;
|
|
int ret;
|
|
|
|
ret = cma_modify_qp_rtr(id_priv, conn_param);
|
|
if (ret)
|
|
return ret;
|
|
|
|
iw_param.ord = conn_param->initiator_depth;
|
|
iw_param.ird = conn_param->responder_resources;
|
|
iw_param.private_data = conn_param->private_data;
|
|
iw_param.private_data_len = conn_param->private_data_len;
|
|
if (id_priv->id.qp) {
|
|
iw_param.qpn = id_priv->qp_num;
|
|
} else
|
|
iw_param.qpn = conn_param->qp_num;
|
|
|
|
return iw_cm_accept(id_priv->cm_id.iw, &iw_param);
|
|
}
|
|
|
|
static int cma_send_sidr_rep(struct rdma_id_private *id_priv,
|
|
enum ib_cm_sidr_status status,
|
|
const void *private_data, int private_data_len)
|
|
{
|
|
struct ib_cm_sidr_rep_param rep;
|
|
int ret;
|
|
|
|
memset(&rep, 0, sizeof rep);
|
|
rep.status = status;
|
|
if (status == IB_SIDR_SUCCESS) {
|
|
ret = cma_set_qkey(id_priv);
|
|
if (ret)
|
|
return ret;
|
|
rep.qp_num = id_priv->qp_num;
|
|
rep.qkey = id_priv->qkey;
|
|
}
|
|
rep.private_data = private_data;
|
|
rep.private_data_len = private_data_len;
|
|
|
|
return ib_send_cm_sidr_rep(id_priv->cm_id.ib, &rep);
|
|
}
|
|
|
|
int rdma_accept(struct rdma_cm_id *id, struct rdma_conn_param *conn_param)
|
|
{
|
|
struct rdma_id_private *id_priv;
|
|
int ret;
|
|
|
|
id_priv = container_of(id, struct rdma_id_private, id);
|
|
|
|
id_priv->owner = task_pid_nr(current);
|
|
|
|
if (!cma_comp(id_priv, RDMA_CM_CONNECT))
|
|
return -EINVAL;
|
|
|
|
if (!id->qp && conn_param) {
|
|
id_priv->qp_num = conn_param->qp_num;
|
|
id_priv->srq = conn_param->srq;
|
|
}
|
|
|
|
switch (rdma_node_get_transport(id->device->node_type)) {
|
|
case RDMA_TRANSPORT_IB:
|
|
if (id->qp_type == IB_QPT_UD) {
|
|
if (conn_param)
|
|
ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS,
|
|
conn_param->private_data,
|
|
conn_param->private_data_len);
|
|
else
|
|
ret = cma_send_sidr_rep(id_priv, IB_SIDR_SUCCESS,
|
|
NULL, 0);
|
|
} else {
|
|
if (conn_param)
|
|
ret = cma_accept_ib(id_priv, conn_param);
|
|
else
|
|
ret = cma_rep_recv(id_priv);
|
|
}
|
|
break;
|
|
case RDMA_TRANSPORT_IWARP:
|
|
ret = cma_accept_iw(id_priv, conn_param);
|
|
break;
|
|
default:
|
|
ret = -ENOSYS;
|
|
break;
|
|
}
|
|
|
|
if (ret)
|
|
goto reject;
|
|
|
|
return 0;
|
|
reject:
|
|
cma_modify_qp_err(id_priv);
|
|
rdma_reject(id, NULL, 0);
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(rdma_accept);
|
|
|
|
int rdma_notify(struct rdma_cm_id *id, enum ib_event_type event)
|
|
{
|
|
struct rdma_id_private *id_priv;
|
|
int ret;
|
|
|
|
id_priv = container_of(id, struct rdma_id_private, id);
|
|
if (!id_priv->cm_id.ib)
|
|
return -EINVAL;
|
|
|
|
switch (id->device->node_type) {
|
|
case RDMA_NODE_IB_CA:
|
|
ret = ib_cm_notify(id_priv->cm_id.ib, event);
|
|
break;
|
|
default:
|
|
ret = 0;
|
|
break;
|
|
}
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(rdma_notify);
|
|
|
|
int rdma_reject(struct rdma_cm_id *id, const void *private_data,
|
|
u8 private_data_len)
|
|
{
|
|
struct rdma_id_private *id_priv;
|
|
int ret;
|
|
|
|
id_priv = container_of(id, struct rdma_id_private, id);
|
|
if (!id_priv->cm_id.ib)
|
|
return -EINVAL;
|
|
|
|
switch (rdma_node_get_transport(id->device->node_type)) {
|
|
case RDMA_TRANSPORT_IB:
|
|
if (id->qp_type == IB_QPT_UD)
|
|
ret = cma_send_sidr_rep(id_priv, IB_SIDR_REJECT,
|
|
private_data, private_data_len);
|
|
else
|
|
ret = ib_send_cm_rej(id_priv->cm_id.ib,
|
|
IB_CM_REJ_CONSUMER_DEFINED, NULL,
|
|
0, private_data, private_data_len);
|
|
break;
|
|
case RDMA_TRANSPORT_IWARP:
|
|
ret = iw_cm_reject(id_priv->cm_id.iw,
|
|
private_data, private_data_len);
|
|
break;
|
|
default:
|
|
ret = -ENOSYS;
|
|
break;
|
|
}
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(rdma_reject);
|
|
|
|
int rdma_disconnect(struct rdma_cm_id *id)
|
|
{
|
|
struct rdma_id_private *id_priv;
|
|
int ret;
|
|
|
|
id_priv = container_of(id, struct rdma_id_private, id);
|
|
if (!id_priv->cm_id.ib)
|
|
return -EINVAL;
|
|
|
|
switch (rdma_node_get_transport(id->device->node_type)) {
|
|
case RDMA_TRANSPORT_IB:
|
|
ret = cma_modify_qp_err(id_priv);
|
|
if (ret)
|
|
goto out;
|
|
/* Initiate or respond to a disconnect. */
|
|
if (ib_send_cm_dreq(id_priv->cm_id.ib, NULL, 0))
|
|
ib_send_cm_drep(id_priv->cm_id.ib, NULL, 0);
|
|
break;
|
|
case RDMA_TRANSPORT_IWARP:
|
|
ret = iw_cm_disconnect(id_priv->cm_id.iw, 0);
|
|
break;
|
|
default:
|
|
ret = -EINVAL;
|
|
break;
|
|
}
|
|
out:
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(rdma_disconnect);
|
|
|
|
static int cma_ib_mc_handler(int status, struct ib_sa_multicast *multicast)
|
|
{
|
|
struct rdma_id_private *id_priv;
|
|
struct cma_multicast *mc = multicast->context;
|
|
struct rdma_cm_event event;
|
|
int ret;
|
|
|
|
id_priv = mc->id_priv;
|
|
if (cma_disable_callback(id_priv, RDMA_CM_ADDR_BOUND) &&
|
|
cma_disable_callback(id_priv, RDMA_CM_ADDR_RESOLVED))
|
|
return 0;
|
|
|
|
mutex_lock(&id_priv->qp_mutex);
|
|
if (!status && id_priv->id.qp)
|
|
status = ib_attach_mcast(id_priv->id.qp, &multicast->rec.mgid,
|
|
be16_to_cpu(multicast->rec.mlid));
|
|
mutex_unlock(&id_priv->qp_mutex);
|
|
|
|
memset(&event, 0, sizeof event);
|
|
event.status = status;
|
|
event.param.ud.private_data = mc->context;
|
|
if (!status) {
|
|
event.event = RDMA_CM_EVENT_MULTICAST_JOIN;
|
|
ib_init_ah_from_mcmember(id_priv->id.device,
|
|
id_priv->id.port_num, &multicast->rec,
|
|
&event.param.ud.ah_attr);
|
|
event.param.ud.qp_num = 0xFFFFFF;
|
|
event.param.ud.qkey = be32_to_cpu(multicast->rec.qkey);
|
|
} else
|
|
event.event = RDMA_CM_EVENT_MULTICAST_ERROR;
|
|
|
|
ret = id_priv->id.event_handler(&id_priv->id, &event);
|
|
if (ret) {
|
|
cma_exch(id_priv, RDMA_CM_DESTROYING);
|
|
mutex_unlock(&id_priv->handler_mutex);
|
|
rdma_destroy_id(&id_priv->id);
|
|
return 0;
|
|
}
|
|
|
|
mutex_unlock(&id_priv->handler_mutex);
|
|
return 0;
|
|
}
|
|
|
|
static void cma_set_mgid(struct rdma_id_private *id_priv,
|
|
struct sockaddr *addr, union ib_gid *mgid)
|
|
{
|
|
unsigned char mc_map[MAX_ADDR_LEN];
|
|
struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
|
|
struct sockaddr_in *sin = (struct sockaddr_in *) addr;
|
|
struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *) addr;
|
|
|
|
if (cma_any_addr(addr)) {
|
|
memset(mgid, 0, sizeof *mgid);
|
|
} else if ((addr->sa_family == AF_INET6) &&
|
|
((be32_to_cpu(sin6->sin6_addr.s6_addr32[0]) & 0xFFF0FFFF) ==
|
|
0xFF10A01B)) {
|
|
/* IPv6 address is an SA assigned MGID. */
|
|
memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
|
|
} else if ((addr->sa_family == AF_INET6)) {
|
|
ipv6_ib_mc_map(&sin6->sin6_addr, dev_addr->broadcast, mc_map);
|
|
if (id_priv->id.ps == RDMA_PS_UDP)
|
|
mc_map[7] = 0x01; /* Use RDMA CM signature */
|
|
*mgid = *(union ib_gid *) (mc_map + 4);
|
|
} else {
|
|
ip_ib_mc_map(sin->sin_addr.s_addr, dev_addr->broadcast, mc_map);
|
|
if (id_priv->id.ps == RDMA_PS_UDP)
|
|
mc_map[7] = 0x01; /* Use RDMA CM signature */
|
|
*mgid = *(union ib_gid *) (mc_map + 4);
|
|
}
|
|
}
|
|
|
|
static int cma_join_ib_multicast(struct rdma_id_private *id_priv,
|
|
struct cma_multicast *mc)
|
|
{
|
|
struct ib_sa_mcmember_rec rec;
|
|
struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
|
|
ib_sa_comp_mask comp_mask;
|
|
int ret;
|
|
|
|
ib_addr_get_mgid(dev_addr, &rec.mgid);
|
|
ret = ib_sa_get_mcmember_rec(id_priv->id.device, id_priv->id.port_num,
|
|
&rec.mgid, &rec);
|
|
if (ret)
|
|
return ret;
|
|
|
|
cma_set_mgid(id_priv, (struct sockaddr *) &mc->addr, &rec.mgid);
|
|
if (id_priv->id.ps == RDMA_PS_UDP)
|
|
rec.qkey = cpu_to_be32(RDMA_UDP_QKEY);
|
|
rdma_addr_get_sgid(dev_addr, &rec.port_gid);
|
|
rec.pkey = cpu_to_be16(ib_addr_get_pkey(dev_addr));
|
|
rec.join_state = 1;
|
|
|
|
comp_mask = IB_SA_MCMEMBER_REC_MGID | IB_SA_MCMEMBER_REC_PORT_GID |
|
|
IB_SA_MCMEMBER_REC_PKEY | IB_SA_MCMEMBER_REC_JOIN_STATE |
|
|
IB_SA_MCMEMBER_REC_QKEY | IB_SA_MCMEMBER_REC_SL |
|
|
IB_SA_MCMEMBER_REC_FLOW_LABEL |
|
|
IB_SA_MCMEMBER_REC_TRAFFIC_CLASS;
|
|
|
|
if (id_priv->id.ps == RDMA_PS_IPOIB)
|
|
comp_mask |= IB_SA_MCMEMBER_REC_RATE |
|
|
IB_SA_MCMEMBER_REC_RATE_SELECTOR;
|
|
|
|
mc->multicast.ib = ib_sa_join_multicast(&sa_client, id_priv->id.device,
|
|
id_priv->id.port_num, &rec,
|
|
comp_mask, GFP_KERNEL,
|
|
cma_ib_mc_handler, mc);
|
|
if (IS_ERR(mc->multicast.ib))
|
|
return PTR_ERR(mc->multicast.ib);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void iboe_mcast_work_handler(struct work_struct *work)
|
|
{
|
|
struct iboe_mcast_work *mw = container_of(work, struct iboe_mcast_work, work);
|
|
struct cma_multicast *mc = mw->mc;
|
|
struct ib_sa_multicast *m = mc->multicast.ib;
|
|
|
|
mc->multicast.ib->context = mc;
|
|
cma_ib_mc_handler(0, m);
|
|
kref_put(&mc->mcref, release_mc);
|
|
kfree(mw);
|
|
}
|
|
|
|
static void cma_iboe_set_mgid(struct sockaddr *addr, union ib_gid *mgid)
|
|
{
|
|
struct sockaddr_in *sin = (struct sockaddr_in *)addr;
|
|
struct sockaddr_in6 *sin6 = (struct sockaddr_in6 *)addr;
|
|
|
|
if (cma_any_addr(addr)) {
|
|
memset(mgid, 0, sizeof *mgid);
|
|
} else if (addr->sa_family == AF_INET6) {
|
|
memcpy(mgid, &sin6->sin6_addr, sizeof *mgid);
|
|
} else {
|
|
mgid->raw[0] = 0xff;
|
|
mgid->raw[1] = 0x0e;
|
|
mgid->raw[2] = 0;
|
|
mgid->raw[3] = 0;
|
|
mgid->raw[4] = 0;
|
|
mgid->raw[5] = 0;
|
|
mgid->raw[6] = 0;
|
|
mgid->raw[7] = 0;
|
|
mgid->raw[8] = 0;
|
|
mgid->raw[9] = 0;
|
|
mgid->raw[10] = 0xff;
|
|
mgid->raw[11] = 0xff;
|
|
*(__be32 *)(&mgid->raw[12]) = sin->sin_addr.s_addr;
|
|
}
|
|
}
|
|
|
|
static int cma_iboe_join_multicast(struct rdma_id_private *id_priv,
|
|
struct cma_multicast *mc)
|
|
{
|
|
struct iboe_mcast_work *work;
|
|
struct rdma_dev_addr *dev_addr = &id_priv->id.route.addr.dev_addr;
|
|
int err;
|
|
struct sockaddr *addr = (struct sockaddr *)&mc->addr;
|
|
struct net_device *ndev = NULL;
|
|
|
|
if (cma_zero_addr((struct sockaddr *)&mc->addr))
|
|
return -EINVAL;
|
|
|
|
work = kzalloc(sizeof *work, GFP_KERNEL);
|
|
if (!work)
|
|
return -ENOMEM;
|
|
|
|
mc->multicast.ib = kzalloc(sizeof(struct ib_sa_multicast), GFP_KERNEL);
|
|
if (!mc->multicast.ib) {
|
|
err = -ENOMEM;
|
|
goto out1;
|
|
}
|
|
|
|
cma_iboe_set_mgid(addr, &mc->multicast.ib->rec.mgid);
|
|
|
|
mc->multicast.ib->rec.pkey = cpu_to_be16(0xffff);
|
|
if (id_priv->id.ps == RDMA_PS_UDP)
|
|
mc->multicast.ib->rec.qkey = cpu_to_be32(RDMA_UDP_QKEY);
|
|
|
|
if (dev_addr->bound_dev_if)
|
|
ndev = dev_get_by_index(&init_net, dev_addr->bound_dev_if);
|
|
if (!ndev) {
|
|
err = -ENODEV;
|
|
goto out2;
|
|
}
|
|
mc->multicast.ib->rec.rate = iboe_get_rate(ndev);
|
|
mc->multicast.ib->rec.hop_limit = 1;
|
|
mc->multicast.ib->rec.mtu = iboe_get_mtu(ndev->mtu);
|
|
dev_put(ndev);
|
|
if (!mc->multicast.ib->rec.mtu) {
|
|
err = -EINVAL;
|
|
goto out2;
|
|
}
|
|
iboe_addr_get_sgid(dev_addr, &mc->multicast.ib->rec.port_gid);
|
|
work->id = id_priv;
|
|
work->mc = mc;
|
|
INIT_WORK(&work->work, iboe_mcast_work_handler);
|
|
kref_get(&mc->mcref);
|
|
queue_work(cma_wq, &work->work);
|
|
|
|
return 0;
|
|
|
|
out2:
|
|
kfree(mc->multicast.ib);
|
|
out1:
|
|
kfree(work);
|
|
return err;
|
|
}
|
|
|
|
int rdma_join_multicast(struct rdma_cm_id *id, struct sockaddr *addr,
|
|
void *context)
|
|
{
|
|
struct rdma_id_private *id_priv;
|
|
struct cma_multicast *mc;
|
|
int ret;
|
|
|
|
id_priv = container_of(id, struct rdma_id_private, id);
|
|
if (!cma_comp(id_priv, RDMA_CM_ADDR_BOUND) &&
|
|
!cma_comp(id_priv, RDMA_CM_ADDR_RESOLVED))
|
|
return -EINVAL;
|
|
|
|
mc = kmalloc(sizeof *mc, GFP_KERNEL);
|
|
if (!mc)
|
|
return -ENOMEM;
|
|
|
|
memcpy(&mc->addr, addr, ip_addr_size(addr));
|
|
mc->context = context;
|
|
mc->id_priv = id_priv;
|
|
|
|
spin_lock(&id_priv->lock);
|
|
list_add(&mc->list, &id_priv->mc_list);
|
|
spin_unlock(&id_priv->lock);
|
|
|
|
switch (rdma_node_get_transport(id->device->node_type)) {
|
|
case RDMA_TRANSPORT_IB:
|
|
switch (rdma_port_get_link_layer(id->device, id->port_num)) {
|
|
case IB_LINK_LAYER_INFINIBAND:
|
|
ret = cma_join_ib_multicast(id_priv, mc);
|
|
break;
|
|
case IB_LINK_LAYER_ETHERNET:
|
|
kref_init(&mc->mcref);
|
|
ret = cma_iboe_join_multicast(id_priv, mc);
|
|
break;
|
|
default:
|
|
ret = -EINVAL;
|
|
}
|
|
break;
|
|
default:
|
|
ret = -ENOSYS;
|
|
break;
|
|
}
|
|
|
|
if (ret) {
|
|
spin_lock_irq(&id_priv->lock);
|
|
list_del(&mc->list);
|
|
spin_unlock_irq(&id_priv->lock);
|
|
kfree(mc);
|
|
}
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL(rdma_join_multicast);
|
|
|
|
void rdma_leave_multicast(struct rdma_cm_id *id, struct sockaddr *addr)
|
|
{
|
|
struct rdma_id_private *id_priv;
|
|
struct cma_multicast *mc;
|
|
|
|
id_priv = container_of(id, struct rdma_id_private, id);
|
|
spin_lock_irq(&id_priv->lock);
|
|
list_for_each_entry(mc, &id_priv->mc_list, list) {
|
|
if (!memcmp(&mc->addr, addr, ip_addr_size(addr))) {
|
|
list_del(&mc->list);
|
|
spin_unlock_irq(&id_priv->lock);
|
|
|
|
if (id->qp)
|
|
ib_detach_mcast(id->qp,
|
|
&mc->multicast.ib->rec.mgid,
|
|
be16_to_cpu(mc->multicast.ib->rec.mlid));
|
|
if (rdma_node_get_transport(id_priv->cma_dev->device->node_type) == RDMA_TRANSPORT_IB) {
|
|
switch (rdma_port_get_link_layer(id->device, id->port_num)) {
|
|
case IB_LINK_LAYER_INFINIBAND:
|
|
ib_sa_free_multicast(mc->multicast.ib);
|
|
kfree(mc);
|
|
break;
|
|
case IB_LINK_LAYER_ETHERNET:
|
|
kref_put(&mc->mcref, release_mc);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
return;
|
|
}
|
|
}
|
|
spin_unlock_irq(&id_priv->lock);
|
|
}
|
|
EXPORT_SYMBOL(rdma_leave_multicast);
|
|
|
|
static int cma_netdev_change(struct net_device *ndev, struct rdma_id_private *id_priv)
|
|
{
|
|
struct rdma_dev_addr *dev_addr;
|
|
struct cma_ndev_work *work;
|
|
|
|
dev_addr = &id_priv->id.route.addr.dev_addr;
|
|
|
|
if ((dev_addr->bound_dev_if == ndev->ifindex) &&
|
|
memcmp(dev_addr->src_dev_addr, ndev->dev_addr, ndev->addr_len)) {
|
|
printk(KERN_INFO "RDMA CM addr change for ndev %s used by id %p\n",
|
|
ndev->name, &id_priv->id);
|
|
work = kzalloc(sizeof *work, GFP_KERNEL);
|
|
if (!work)
|
|
return -ENOMEM;
|
|
|
|
INIT_WORK(&work->work, cma_ndev_work_handler);
|
|
work->id = id_priv;
|
|
work->event.event = RDMA_CM_EVENT_ADDR_CHANGE;
|
|
atomic_inc(&id_priv->refcount);
|
|
queue_work(cma_wq, &work->work);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int cma_netdev_callback(struct notifier_block *self, unsigned long event,
|
|
void *ctx)
|
|
{
|
|
struct net_device *ndev = (struct net_device *)ctx;
|
|
struct cma_device *cma_dev;
|
|
struct rdma_id_private *id_priv;
|
|
int ret = NOTIFY_DONE;
|
|
|
|
if (dev_net(ndev) != &init_net)
|
|
return NOTIFY_DONE;
|
|
|
|
if (event != NETDEV_BONDING_FAILOVER)
|
|
return NOTIFY_DONE;
|
|
|
|
if (!(ndev->flags & IFF_MASTER) || !(ndev->priv_flags & IFF_BONDING))
|
|
return NOTIFY_DONE;
|
|
|
|
mutex_lock(&lock);
|
|
list_for_each_entry(cma_dev, &dev_list, list)
|
|
list_for_each_entry(id_priv, &cma_dev->id_list, list) {
|
|
ret = cma_netdev_change(ndev, id_priv);
|
|
if (ret)
|
|
goto out;
|
|
}
|
|
|
|
out:
|
|
mutex_unlock(&lock);
|
|
return ret;
|
|
}
|
|
|
|
static struct notifier_block cma_nb = {
|
|
.notifier_call = cma_netdev_callback
|
|
};
|
|
|
|
static void cma_add_one(struct ib_device *device)
|
|
{
|
|
struct cma_device *cma_dev;
|
|
struct rdma_id_private *id_priv;
|
|
|
|
cma_dev = kmalloc(sizeof *cma_dev, GFP_KERNEL);
|
|
if (!cma_dev)
|
|
return;
|
|
|
|
cma_dev->device = device;
|
|
|
|
init_completion(&cma_dev->comp);
|
|
atomic_set(&cma_dev->refcount, 1);
|
|
INIT_LIST_HEAD(&cma_dev->id_list);
|
|
ib_set_client_data(device, &cma_client, cma_dev);
|
|
|
|
mutex_lock(&lock);
|
|
list_add_tail(&cma_dev->list, &dev_list);
|
|
list_for_each_entry(id_priv, &listen_any_list, list)
|
|
cma_listen_on_dev(id_priv, cma_dev);
|
|
mutex_unlock(&lock);
|
|
}
|
|
|
|
static int cma_remove_id_dev(struct rdma_id_private *id_priv)
|
|
{
|
|
struct rdma_cm_event event;
|
|
enum rdma_cm_state state;
|
|
int ret = 0;
|
|
|
|
/* Record that we want to remove the device */
|
|
state = cma_exch(id_priv, RDMA_CM_DEVICE_REMOVAL);
|
|
if (state == RDMA_CM_DESTROYING)
|
|
return 0;
|
|
|
|
cma_cancel_operation(id_priv, state);
|
|
mutex_lock(&id_priv->handler_mutex);
|
|
|
|
/* Check for destruction from another callback. */
|
|
if (!cma_comp(id_priv, RDMA_CM_DEVICE_REMOVAL))
|
|
goto out;
|
|
|
|
memset(&event, 0, sizeof event);
|
|
event.event = RDMA_CM_EVENT_DEVICE_REMOVAL;
|
|
ret = id_priv->id.event_handler(&id_priv->id, &event);
|
|
out:
|
|
mutex_unlock(&id_priv->handler_mutex);
|
|
return ret;
|
|
}
|
|
|
|
static void cma_process_remove(struct cma_device *cma_dev)
|
|
{
|
|
struct rdma_id_private *id_priv;
|
|
int ret;
|
|
|
|
mutex_lock(&lock);
|
|
while (!list_empty(&cma_dev->id_list)) {
|
|
id_priv = list_entry(cma_dev->id_list.next,
|
|
struct rdma_id_private, list);
|
|
|
|
list_del(&id_priv->listen_list);
|
|
list_del_init(&id_priv->list);
|
|
atomic_inc(&id_priv->refcount);
|
|
mutex_unlock(&lock);
|
|
|
|
ret = id_priv->internal_id ? 1 : cma_remove_id_dev(id_priv);
|
|
cma_deref_id(id_priv);
|
|
if (ret)
|
|
rdma_destroy_id(&id_priv->id);
|
|
|
|
mutex_lock(&lock);
|
|
}
|
|
mutex_unlock(&lock);
|
|
|
|
cma_deref_dev(cma_dev);
|
|
wait_for_completion(&cma_dev->comp);
|
|
}
|
|
|
|
static void cma_remove_one(struct ib_device *device)
|
|
{
|
|
struct cma_device *cma_dev;
|
|
|
|
cma_dev = ib_get_client_data(device, &cma_client);
|
|
if (!cma_dev)
|
|
return;
|
|
|
|
mutex_lock(&lock);
|
|
list_del(&cma_dev->list);
|
|
mutex_unlock(&lock);
|
|
|
|
cma_process_remove(cma_dev);
|
|
kfree(cma_dev);
|
|
}
|
|
|
|
static int cma_get_id_stats(struct sk_buff *skb, struct netlink_callback *cb)
|
|
{
|
|
struct nlmsghdr *nlh;
|
|
struct rdma_cm_id_stats *id_stats;
|
|
struct rdma_id_private *id_priv;
|
|
struct rdma_cm_id *id = NULL;
|
|
struct cma_device *cma_dev;
|
|
int i_dev = 0, i_id = 0;
|
|
|
|
/*
|
|
* We export all of the IDs as a sequence of messages. Each
|
|
* ID gets its own netlink message.
|
|
*/
|
|
mutex_lock(&lock);
|
|
|
|
list_for_each_entry(cma_dev, &dev_list, list) {
|
|
if (i_dev < cb->args[0]) {
|
|
i_dev++;
|
|
continue;
|
|
}
|
|
|
|
i_id = 0;
|
|
list_for_each_entry(id_priv, &cma_dev->id_list, list) {
|
|
if (i_id < cb->args[1]) {
|
|
i_id++;
|
|
continue;
|
|
}
|
|
|
|
id_stats = ibnl_put_msg(skb, &nlh, cb->nlh->nlmsg_seq,
|
|
sizeof *id_stats, RDMA_NL_RDMA_CM,
|
|
RDMA_NL_RDMA_CM_ID_STATS);
|
|
if (!id_stats)
|
|
goto out;
|
|
|
|
memset(id_stats, 0, sizeof *id_stats);
|
|
id = &id_priv->id;
|
|
id_stats->node_type = id->route.addr.dev_addr.dev_type;
|
|
id_stats->port_num = id->port_num;
|
|
id_stats->bound_dev_if =
|
|
id->route.addr.dev_addr.bound_dev_if;
|
|
|
|
if (id->route.addr.src_addr.ss_family == AF_INET) {
|
|
if (ibnl_put_attr(skb, nlh,
|
|
sizeof(struct sockaddr_in),
|
|
&id->route.addr.src_addr,
|
|
RDMA_NL_RDMA_CM_ATTR_SRC_ADDR)) {
|
|
goto out;
|
|
}
|
|
if (ibnl_put_attr(skb, nlh,
|
|
sizeof(struct sockaddr_in),
|
|
&id->route.addr.dst_addr,
|
|
RDMA_NL_RDMA_CM_ATTR_DST_ADDR)) {
|
|
goto out;
|
|
}
|
|
} else if (id->route.addr.src_addr.ss_family == AF_INET6) {
|
|
if (ibnl_put_attr(skb, nlh,
|
|
sizeof(struct sockaddr_in6),
|
|
&id->route.addr.src_addr,
|
|
RDMA_NL_RDMA_CM_ATTR_SRC_ADDR)) {
|
|
goto out;
|
|
}
|
|
if (ibnl_put_attr(skb, nlh,
|
|
sizeof(struct sockaddr_in6),
|
|
&id->route.addr.dst_addr,
|
|
RDMA_NL_RDMA_CM_ATTR_DST_ADDR)) {
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
id_stats->pid = id_priv->owner;
|
|
id_stats->port_space = id->ps;
|
|
id_stats->cm_state = id_priv->state;
|
|
id_stats->qp_num = id_priv->qp_num;
|
|
id_stats->qp_type = id->qp_type;
|
|
|
|
i_id++;
|
|
}
|
|
|
|
cb->args[1] = 0;
|
|
i_dev++;
|
|
}
|
|
|
|
out:
|
|
mutex_unlock(&lock);
|
|
cb->args[0] = i_dev;
|
|
cb->args[1] = i_id;
|
|
|
|
return skb->len;
|
|
}
|
|
|
|
static const struct ibnl_client_cbs cma_cb_table[] = {
|
|
[RDMA_NL_RDMA_CM_ID_STATS] = { .dump = cma_get_id_stats },
|
|
};
|
|
|
|
static int __init cma_init(void)
|
|
{
|
|
int ret;
|
|
|
|
cma_wq = create_singlethread_workqueue("rdma_cm");
|
|
if (!cma_wq)
|
|
return -ENOMEM;
|
|
|
|
ib_sa_register_client(&sa_client);
|
|
rdma_addr_register_client(&addr_client);
|
|
register_netdevice_notifier(&cma_nb);
|
|
|
|
ret = ib_register_client(&cma_client);
|
|
if (ret)
|
|
goto err;
|
|
|
|
if (ibnl_add_client(RDMA_NL_RDMA_CM, RDMA_NL_RDMA_CM_NUM_OPS, cma_cb_table))
|
|
printk(KERN_WARNING "RDMA CMA: failed to add netlink callback\n");
|
|
|
|
return 0;
|
|
|
|
err:
|
|
unregister_netdevice_notifier(&cma_nb);
|
|
rdma_addr_unregister_client(&addr_client);
|
|
ib_sa_unregister_client(&sa_client);
|
|
destroy_workqueue(cma_wq);
|
|
return ret;
|
|
}
|
|
|
|
static void __exit cma_cleanup(void)
|
|
{
|
|
ibnl_remove_client(RDMA_NL_RDMA_CM);
|
|
ib_unregister_client(&cma_client);
|
|
unregister_netdevice_notifier(&cma_nb);
|
|
rdma_addr_unregister_client(&addr_client);
|
|
ib_sa_unregister_client(&sa_client);
|
|
destroy_workqueue(cma_wq);
|
|
idr_destroy(&sdp_ps);
|
|
idr_destroy(&tcp_ps);
|
|
idr_destroy(&udp_ps);
|
|
idr_destroy(&ipoib_ps);
|
|
idr_destroy(&ib_ps);
|
|
}
|
|
|
|
module_init(cma_init);
|
|
module_exit(cma_cleanup);
|