Sean Hefty fc0856c3a3 IB/cm: Rework sending DREQ when destroying a cm_id ... A DREQ is sent in 2 situations: 1. When requested by the user. This DREQ has to wait for a DREP, which will be routed to the user. 2. When the cm_id is destroyed. This DREQ is generated by the CM to notify the peer that the connection has been destroyed. In the latter case, any DREP that is received will be discarded. There's no need to hold a reference on the cm_id. Today, both situations are covered by the same function: cm_send_dreq_locked(). When invoked in the cm_id destroy path, the cm_id reference would be held until the DREQ completes, blocking the destruction. Because it could take several seconds to minutes before the DREQ receives a DREP, the destroy call posts a send for the DREQ then immediately cancels the MAD. However, cancellation is not immediate in the MAD layer. There could still be a delay before the MAD layer returns the DREQ to the CM. Moreover, the only guarantee is that the DREQ will be sent at most once. Introduce a separate flow for sending a DREQ when destroying the cm_id. The new flow will not hold a reference on the cm_id, allowing it to be cleaned up immediately. The cancellation trick is no longer needed. The MAD layer will send the DREQ exactly once. Signed-off-by: Sean Hefty <shefty@nvidia.com> Signed-off-by: Or Har-Toov <ohartoov@nvidia.com> Signed-off-by: Vlad Dumitrescu <vdumitrescu@nvidia.com> Link: https://patch.msgid.link/a288a098b8e0550305755fd4a7937431699317f4.1731495873.git.leon@kernel.org Signed-off-by: Leon Romanovsky <leon@kernel.org>		2024-11-17 04:51:49 -05:00
..
addr.c	inet: introduce dst_rtable() helper	2024-04-30 18:32:38 -07:00
agent.c	RDMA/core: Create GSI QP only when CM is supported	2024-07-01 15:38:05 +03:00
agent.h
cache.c	IB/core: Fix ib_cache_setup_one error flow cleanup	2024-09-04 10:33:09 +03:00
cgroup.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 288	2019-06-05 17:36:37 +02:00
cm_msgs.h	RDMA/core: Add necessary spaces	2021-04-12 14:52:22 -03:00
cm_trace.c	RDMA/cm: Replace pr_debug() call sites with tracepoints	2020-08-24 19:41:41 -03:00
cm_trace.h	trace: Relocate event helper files	2022-12-10 11:01:12 -05:00
cm.c	IB/cm: Rework sending DREQ when destroying a cm_id	2024-11-17 04:51:49 -05:00
cma_configfs.c	RDMA/cma: Fix truncation compilation warning in make_cma_ports	2023-09-18 11:52:10 +03:00
cma_priv.h	RDMA/core: Add an rb_tree that stores cm_ids sorted by ifindex and remote IP	2022-06-16 09:54:35 +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	tracing/treewide: Remove second parameter of __assign_str()	2024-05-22 20:14:47 -04:00
cma.c	RDMA/cma: Fix kmemleak in rdma_core observed during blktests nvme/rdma use siw	2024-05-12 13:04:11 +03:00
core_priv.h	RDMA/core: Remove unused declaration rdma_resolve_ip_route()	2024-08-19 15:19:52 -03:00
counters.c	RDMA/counter: Add optional counter support	2021-10-12 12:48:05 -03:00
cq.c	RDMA/core: Delete useless module.h include	2022-01-28 13:03:12 -04:00
device.c	RDMA/nldev: Add IB device and net device rename events	2024-11-04 06:57:21 -05:00
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 WARNING:at_kernel/workqueue.c:#check_flush_dependency	2024-08-23 11:44:43 -03:00
iwcm.h	RDMA/core: Use refcount_t instead of atomic_t on refcount of iwcm_id_private	2021-06-08 14:35:44 -03:00
iwpm_msg.c	RDMA/iwpm: Rely on the rdma_nl_[un]register() to ensure that requests are valid	2021-07-30 10:01:41 -03:00
iwpm_util.c	RDMA: Remove unnecessary NULL values	2023-08-07 16:56:57 +03:00
iwpm_util.h	RDMA/core: Delete useless module.h include	2022-01-28 13:03:12 -04:00
lag.c	RDMA/core: Remove NULL check before dev_{put, hold}	2024-05-05 15:12:35 +03:00
mad_priv.h	RDMA/core: Remove refcount from struct ib_mad_snoop_private	2021-06-08 14:43:28 -03:00
mad_rmpp.c	RDMA/core: Remove redundant spaces	2021-04-12 14:56:48 -03:00
mad_rmpp.h
mad.c	RDMA/mad: Simplify an alloc_ordered_workqueue() invocation	2024-08-23 11:37:49 -03:00
Makefile	RDMA/umem: Support importing dma-buf as user memory region	2021-01-20 16:07:52 -04:00
mr_pool.c	Linux 5.2-rc6	2019-06-28 21:18:23 -03:00
multicast.c	RDMA/core: Use refcount_t instead of atomic_t on refcount of mcast_port	2021-06-08 14:45:07 -03:00
netlink.c	RDMA/nldev: Add support for RDMA monitoring	2024-09-13 08:29:14 +03:00
nldev.c	RDMA/nldev: Add IB device and net device rename events	2024-11-04 06:57:21 -05:00
opa_smi.h	RDMA: Support more than 255 rdma ports	2021-03-26 09:31:21 -03:00
packer.c
rdma_core.c	RDMA/core: Move ib_uverbs_file struct to uverbs_types.h	2024-11-04 06:57:21 -05:00
rdma_core.h	IB/uverbs: Introduce create/destroy QP commands over ioctl	2020-05-21 20:39:36 -03:00
restrack.c	RDMA/core: Add an option to display driver-specific QPs in the rdmatool	2024-04-30 11:19:29 +03:00
restrack.h	RDMA/restrack: Improve readability in task name management	2020-09-22 19:47:35 -03:00
roce_gid_mgmt.c	RDMA/core: Implement RoCE GID port rescan and export delete function	2024-11-04 06:57:21 -05:00
rw.c	RDMA/core: Fix a couple of obvious typos in comments	2023-10-04 21:55:44 +03:00
sa_query.c	treewide: correct the typo 'retun'	2024-09-09 16:47:43 -07:00
sa.h	RDMA: Support more than 255 rdma ports	2021-03-26 09:31:21 -03:00
security.c	IB/core: Removed port validity check from ib_get_cached_subnet_prefix	2021-06-21 20:49:32 -03:00
smi.c	RDMA: Support more than 255 rdma ports	2021-03-26 09:31:21 -03:00
smi.h	RDMA: Support more than 255 rdma ports	2021-03-26 09:31:21 -03:00
sysfs.c	IB/core: Add support for XDR link speed	2023-09-26 12:38:39 +03:00
trace.c	RDMA/core: Clean up tracepoint headers	2020-07-06 14:54:46 -03:00
ucma.c	[tree-wide] finally take no_llseek out	2024-09-27 08:18:43 -07:00
ud_header.c	RDMA/core: Fix incorrect print format specifier	2021-06-21 15:38:30 -03:00
umem_dmabuf.c	RDMA/umem: Introduce an option to revoke DMABUF umem	2024-08-11 11:12:49 +03:00
umem_odp.c	Linux 6.0	2022-10-06 19:48:45 -03:00
umem.c	RDMA/core: Fix umem iterator when PAGE_SIZE is greater then HCA pgsz	2023-12-04 20:02:41 -04:00
user_mad.c	[tree-wide] finally take no_llseek out	2024-09-27 08:18:43 -07:00
uverbs_cmd.c	struct fd: representation change	2024-08-12 22:01:05 -04:00
uverbs_ioctl.c	RDMA/uverbs: Avoid -Wflex-array-member-not-at-end warnings	2024-03-03 15:38:44 +02:00
uverbs_main.c	RDMA/core: Provide rdma_user_mmap_disassociate() to disassociate mmap pages	2024-10-07 08:53:23 +03:00
uverbs_marshall.c	RDMA/core: Don't infoleak GRH fields	2022-01-05 16:30:19 -04:00
uverbs_std_types_async_fd.c	RDMA/core: Make FD destroy callback void	2020-11-12 12:32:17 -04:00
uverbs_std_types_counters.c	IB/uverbs: Fix an potential error pointer dereference	2023-08-07 16:49:59 +03:00
uverbs_std_types_cq.c	RDMA: Pass entire uverbs attr bundle to create cq function	2024-06-27 16:28:21 -03:00
uverbs_std_types_device.c	IB/core: Add support for XDR link speed	2023-09-26 12:38:39 +03:00
uverbs_std_types_dm.c	RDMA/core: Postpone uobject cleanup on failure till FD close	2020-11-12 12:32:17 -04:00
uverbs_std_types_flow_action.c	RDMA/core: Delete IPsec flow action logic from the core	2022-04-09 08:25:06 +03:00
uverbs_std_types_mr.c	RDMA: Pass uverbs_attr_bundle as part of '.reg_user_mr_dmabuf' API	2024-08-11 11:12:50 +03:00
uverbs_std_types_qp.c	IB/uverbs: fix the typo of optional	2022-10-19 09:46:45 +03:00
uverbs_std_types_srq.c	RDMA/core: Postpone uobject cleanup on failure till FD close	2020-11-12 12:32:17 -04:00
uverbs_std_types_wq.c	RDMA/core: Postpone uobject cleanup on failure till FD close	2020-11-12 12:32:17 -04:00
uverbs_std_types.c	RDMA/core: Make FD destroy callback void	2020-11-12 12:32:17 -04:00
uverbs_uapi.c	RDMA/uverbs: Check for null return of kmalloc_array	2022-01-05 14:16:53 -04:00
uverbs.h	RDMA/core: Move ib_uverbs_file struct to uverbs_types.h	2024-11-04 06:57:21 -05:00
verbs.c	IB/core: add support for draining Shared receive queues	2024-06-26 10:53:29 -03:00