linux-stable/include/rdma
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
..
ib.h RDMA/include: Replace license text with SPDX tags 2020-07-29 14:48:36 -03:00
ib_addr.h RDMA/include: Replace license text with SPDX tags 2020-07-29 14:48:36 -03:00
ib_cache.h RDMA/core: Introduce new GID table query API 2020-10-01 21:20:11 -03:00
ib_cm.h RDMA/cm: Remove unused cm_class 2020-08-18 15:43:07 -03:00
ib_hdrs.h RDMA/include: Replace license text with SPDX tags 2020-07-29 14:48:36 -03:00
ib_mad.h RDMA/include: Replace license text with SPDX tags 2020-07-29 14:48:36 -03:00
ib_marshall.h RDMA/include: Replace license text with SPDX tags 2020-07-29 14:48:36 -03:00
ib_pack.h RDMA/include: Replace license text with SPDX tags 2020-07-29 14:48:36 -03:00
ib_pma.h RDMA/include: Replace license text with SPDX tags 2020-07-29 14:48:36 -03:00
ib_sa.h RDMA/include: Replace license text with SPDX tags 2020-07-29 14:48:36 -03:00
ib_smi.h RDMA/include: Replace license text with SPDX tags 2020-07-29 14:48:36 -03:00
ib_umem.h RDMA/mlx4: Use ib_umem_num_dma_blocks() 2020-09-11 10:24:54 -03:00
ib_umem_odp.h IB/core: Enable ODP sync without faulting 2020-10-01 16:44:05 -03:00
ib_verbs.h RDMA: Explicitly pass in the dma_device to ib_register_device 2020-10-16 13:53:46 -03:00
iba.h RDMA/cm: Add SET/GET implementations to hide IBA wire format 2020-01-25 15:05:59 -04:00
ibta_vol1_c12.h RDMA/cm: Add Enhanced Connection Establishment (ECE) bits 2020-05-27 16:05:05 -03:00
iw_cm.h RDMA/include: Replace license text with SPDX tags 2020-07-29 14:48:36 -03:00
iw_portmap.h RDMA/include: Replace license text with SPDX tags 2020-07-29 14:48:36 -03:00
lag.h RDMA/core: Add LAG functionality 2020-05-02 20:19:54 -03:00
mr_pool.h Linux 5.2-rc6 2019-06-28 21:18:23 -03:00
opa_addr.h RDMA/include: Replace license text with SPDX tags 2020-07-29 14:48:36 -03:00
opa_port_info.h RDMA/include: Replace license text with SPDX tags 2020-07-29 14:48:36 -03:00
opa_smi.h RDMA/include: Replace license text with SPDX tags 2020-07-29 14:48:36 -03:00
opa_vnic.h RDMA/include: Replace license text with SPDX tags 2020-07-29 14:48:36 -03:00
rdma_cm.h RDMA: Add rdma_connect_locked() 2020-10-28 09:14:49 -03:00
rdma_cm_ib.h RDMA/include: Replace license text with SPDX tags 2020-07-29 14:48:36 -03:00
rdma_counter.h RDMA/core: Make rdma_counter.h compile stand alone 2019-07-09 09:44:47 -03:00
rdma_netlink.h RDMA/include: Replace license text with SPDX tags 2020-07-29 14:48:36 -03:00
rdma_vt.h RDMA/include: Replace license text with SPDX tags 2020-07-29 14:48:36 -03:00
rdmavt_cq.h RDMA/include: Replace license text with SPDX tags 2020-07-29 14:48:36 -03:00
rdmavt_mr.h RDMA/include: Replace license text with SPDX tags 2020-07-29 14:48:36 -03:00
rdmavt_qp.h RDMA 5.9 merge window pull request 2020-08-06 16:43:36 -07:00
restrack.h RDMA/restrack: Improve readability in task name management 2020-09-22 19:47:35 -03:00
rw.h Linux 5.2-rc6 2019-06-28 21:18:23 -03:00
signature.h RDMA: Make most headers compile stand alone 2019-07-25 13:58:47 -03:00
tid_rdma_defs.h IB/hfi1: Build TID RDMA WRITE request 2019-02-05 18:07:43 -05:00
uverbs_ioctl.h RDMA/include: Replace license text with SPDX tags 2020-07-29 14:48:36 -03:00
uverbs_named_ioctl.h RDMA/include: Replace license text with SPDX tags 2020-07-29 14:48:36 -03:00
uverbs_std_types.h RDMA/include: Replace license text with SPDX tags 2020-07-29 14:48:36 -03:00
uverbs_types.h RDMA/include: Replace license text with SPDX tags 2020-07-29 14:48:36 -03:00