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linux/drivers/infiniband/core
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Jason Gunthorpe 071ba4cc55 RDMA: Add rdma_connect_locked() 
There are two flows for handling RDMA_CM_EVENT_ROUTE_RESOLVED, either the
handler triggers a completion and another thread does rdma_connect() or
the handler directly calls rdma_connect().

In all cases rdma_connect() needs to hold the handler_mutex, but when
handler's are invoked this is already held by the core code. This causes
ULPs using the 2nd method to deadlock.

Provide a rdma_connect_locked() and have all ULPs call it from their
handlers.

Link: https://lore.kernel.org/r/0-v2-53c22d5c1405+33-rdma_connect_locking_jgg@nvidia.com
Reported-and-tested-by: Guoqing Jiang <guoqing.jiang@cloud.ionos.com>
Fixes: 2a7cec5381 ("RDMA/cma: Fix locking for the RDMA_CM_CONNECT state")
Acked-by: Santosh Shilimkar <santosh.shilimkar@oracle.com>
Acked-by: Jack Wang <jinpu.wang@cloud.ionos.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Max Gurtovoy <mgurtovoy@nvidia.com>
Reviewed-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
2020-10-28 09:14:49 -03:00
..
addr.c RDMA/addr: Fix race with netevent_callback()/rdma_addr_cancel() 2020-09-30 15:29:05 -03:00
agent.c RDMA: Mark if destroy address handle is in a sleepable context 2018-12-19 16:28:03 -07:00
agent.h
cache.c RDMA 5.10 pull request 2020-10-17 11:18:18 -07:00
cgroup.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 288 2019-06-05 17:36:37 +02:00
cm_msgs.h RDMA/cm: Remove CM message structs 2020-01-25 15:11:37 -04:00
cm_trace.c RDMA/cm: Replace pr_debug() call sites with tracepoints 2020-08-24 19:41:41 -03:00
cm_trace.h RDMA/cm: Add tracepoints to track MAD send operations 2020-08-24 19:41:41 -03:00
cm.c Linux 5.9-rc3 2020-08-31 12:28:12 -03:00
cma_configfs.c RDMA/core: Modify enum ib_gid_type and enum rdma_network_type 2020-10-01 21:20:11 -03:00
cma_priv.h RDMA/ucma: Extend ucma_connect to receive ECE parameters 2020-05-27 16:05:05 -03:00
cma_trace.c RDMA/cma: Add trace points in RDMA Connection Manager 2020-01-07 16:10:53 -04:00
cma_trace.h RDMA/core: Move the rdma_show_ib_cm_event() macro 2020-08-24 16:01:47 -03:00
cma.c RDMA: Add rdma_connect_locked() 2020-10-28 09:14:49 -03:00
core_priv.h RDMA/restrack: Improve readability in task name management 2020-09-22 19:47:35 -03:00
counters.c RDMA/restrack: Improve readability in task name management 2020-09-22 19:47:35 -03:00
cq.c RDMA/restrack: Improve readability in task name management 2020-09-22 19:47:35 -03:00
device.c RDMA: Explicitly pass in the dma_device to ib_register_device 2020-10-16 13:53:46 -03:00
ib_core_uverbs.c RDMA/core: Ensure that rdma_user_mmap_entry_remove() is a fence 2020-01-25 14:48:33 -04:00
iwcm.c RDMA/iwcm: Fix iwcm work deallocation 2020-03-04 14:28:25 -04:00
iwcm.h
iwpm_msg.c RDMA/iwpm: Delete unnecessary checks before the macro call "dev_kfree_skb" 2019-08-27 13:09:23 -03:00
iwpm_util.c RDMA/iwpm: Delete unnecessary checks before the macro call "dev_kfree_skb" 2019-08-27 13:09:23 -03:00
iwpm_util.h infiniband: fix core/ipwm_util.h kernel-doc warnings 2019-10-22 14:45:31 -03:00
lag.c RDMA/core: Consider flow label when building skb 2020-05-06 16:51:43 -03:00
mad_priv.h IB/mad: Change atomics to refcount API 2020-06-24 16:43:45 -03:00
mad_rmpp.c IB/mad: Delete RMPP_STATE_CANCELING state 2020-06-24 16:43:45 -03:00
mad_rmpp.h
mad.c RDMA 5.9 merge window pull request 2020-08-06 16:43:36 -07:00
Makefile RDMA/cm: Replace pr_debug() call sites with tracepoints 2020-08-24 19:41:41 -03:00
mr_pool.c Linux 5.2-rc6 2019-06-28 21:18:23 -03:00
multicast.c RDMA: Allow ib_client's to fail when add() is called 2020-05-06 11:57:33 -03:00
netlink.c IB/core: Avoid deadlock during netlink message handling 2019-10-24 20:49:37 -03:00
nldev.c RDMA/netlink: Remove CAP_NET_RAW check when dump a raw QP 2020-07-29 15:51:19 -03:00
opa_smi.h RDMA: Start use ib_device_ops 2018-12-12 07:40:16 -07:00
packer.c
rdma_core.c RDMA/core: Remove ucontext->closing 2020-09-30 15:27:19 -03:00
rdma_core.h IB/uverbs: Introduce create/destroy QP commands over ioctl 2020-05-21 20:39:36 -03:00
restrack.c RDMA/restrack: Improve readability in task name management 2020-09-22 19:47:35 -03:00
restrack.h RDMA/restrack: Improve readability in task name management 2020-09-22 19:47:35 -03:00
roce_gid_mgmt.c net: core: introduce struct netdev_nested_priv for nested interface infrastructure 2020-09-28 15:00:15 -07:00
rw.c treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
sa_query.c IB/sa: Resolv use-after-free in ib_nl_make_request() 2020-07-02 16:05:12 -03:00
sa.h
security.c RDMA/core: Ensure security pkey modify is not lost 2020-03-24 19:53:25 -03:00
smi.c
smi.h RDMA: Start use ib_device_ops 2018-12-12 07:40:16 -07:00
sysfs.c RDMA/core: Change rdma_get_gid_attr returned error code 2020-10-01 21:20:11 -03:00
trace.c RDMA/core: Clean up tracepoint headers 2020-07-06 14:54:46 -03:00
ucma.c RDMA/ucma: Fix use after free in destroy id flow 2020-10-16 14:07:08 -03:00
ud_header.c RDMA/core: Use sizeof_field() helper 2020-05-27 13:46:05 -03:00
umem_odp.c IB/core: Enable ODP sync without faulting 2020-10-01 16:44:05 -03:00
umem.c Merge branch 'dynamic_sg' into rdma.git for-next 2020-10-16 12:40:58 -03:00
user_mad.c RDMA: Allow ib_client's to fail when add() is called 2020-05-06 11:57:33 -03:00
uverbs_cmd.c RDMA/core: Align write and ioctl checks of QP types 2020-09-29 13:11:06 -03:00
uverbs_ioctl.c treewide: Use fallthrough pseudo-keyword 2020-08-23 17:36:59 -05:00
uverbs_main.c RDMA 5.10 pull request 2020-10-17 11:18:18 -07:00
uverbs_marshall.c
uverbs_std_types_async_fd.c RDMA/uverbs: Move IB_EVENT_DEVICE_FATAL to destroy_uobj 2020-05-12 17:02:25 -03:00
uverbs_std_types_counters.c RDMA: Make counters destroy symmetrical 2020-09-09 14:14:29 -03:00
uverbs_std_types_cq.c RDMA/restrack: Improve readability in task name management 2020-09-22 19:47:35 -03:00
uverbs_std_types_device.c RDMA/uverbs: Fix false error in query gid IOCTL 2020-10-26 19:29:26 -03:00
uverbs_std_types_dm.c IB: When attrs.udata/ufile is available use that instead of uobject 2019-04-08 13:05:25 -03:00
uverbs_std_types_flow_action.c IB: When attrs.udata/ufile is available use that instead of uobject 2019-04-08 13:05:25 -03:00
uverbs_std_types_mr.c RDMA/mlx5: Add missing srcu_read_lock in ODP implicit flow 2020-07-24 16:44:06 -03:00
uverbs_std_types_qp.c IB/uverbs: Introduce create/destroy QP commands over ioctl 2020-05-21 20:39:36 -03:00
uverbs_std_types_srq.c IB/uverbs: Introduce create/destroy SRQ commands over ioctl 2020-05-21 20:39:35 -03:00
uverbs_std_types_wq.c RDMA: Restore ability to return error for destroy WQ 2020-09-09 14:14:29 -03:00
uverbs_std_types.c RDMA: Convert RWQ table logic to ib_core allocation scheme 2020-09-17 14:04:33 -03:00
uverbs_uapi.c IB/uverbs: Introduce create/destroy QP commands over ioctl 2020-05-21 20:39:36 -03:00
uverbs.h IB/uverbs: Extend CQ to get its own asynchronous event FD 2020-05-21 20:34:53 -03:00
verbs.c RDMA/core: Modify enum ib_gid_type and enum rdma_network_type 2020-10-01 21:20:11 -03:00