JIRA: https://issues.redhat.com/browse/RHEL-77880
commit fc0856c3a32576fb21c494f38b9c6c8dc3bf58ab
Author: Sean Hefty <shefty@nvidia.com>
Date: Wed Nov 13 13:12:56 2024 +0200
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>
Signed-off-by: Kamal Heib <kheib@redhat.com>
JIRA: https://issues.redhat.com/browse/RHEL-77880
commit 1e5159219076ddb2e44338c667c83fd1bd43dfef
Author: Sean Hefty <shefty@nvidia.com>
Date: Wed Nov 13 13:12:55 2024 +0200
IB/cm: Do not hold reference on cm_id unless needed
Typically, when the CM sends a MAD it bumps a reference count
on the associated cm_id. There are some exceptions, such
as when the MAD is a direct response to a receive MAD. For
example, the CM may generate an MRA in response to a duplicate
REQ. But, in general, if a MAD may be sent as a result of
the user invoking an API call (e.g. ib_send_cm_rep(),
ib_send_cm_rtu(), etc.), a reference is taken on the cm_id.
This reference is necessary if the MAD requires a response.
The reference allows routing a response MAD back to the
cm_id, or, if no response is received, allows updating the
cm_id state to reflect the failure.
For MADs which do not generate a response from the
target, however, there's no need to hold a reference on the cm_id.
Such MADs will not be retried by the MAD layer and their
completions do not change the state of the cm_id.
There are 2 internal calls used to allocate MADs which take
a reference on the cm_id: cm_alloc_msg() and cm_alloc_priv_msg().
The latter calls the former. It turns out that all other places
where cm_alloc_msg() is called are for MADs that do not generate
a response from the target: sending an RTU, DREP, REJ, MRA, or
SIDR REP. In all of these cases, there's no need to hold a
reference on the cm_id.
The benefit of dropping unneeded references is that it allows
destruction of the cm_id to proceed immediately. Currently,
the cm_destroy_id() call blocks as long as there's a reference
held on the cm_id. Worse, is that cm_destroy_id() will send
MADs, which it then needs to complete. Sending the MADs is
beneficial, as they notify the peer that a connection is
being destroyed. However, since the MADs hold a reference
on the cm_id, they block destruction and cannot be retried.
Move cm_id referencing from cm_alloc_msg() to cm_alloc_priv_msg().
The latter should hold a reference on the cm_id in all cases but
one, which will be handled in a separate patch. cm_alloc_priv_msg()
is used when sending a REQ, REP, DREQ, and SIDR REQ, all of which
require a response.
Also, merge common code into cm_alloc_priv_msg() and combine the
freeing of all messages which do not need a response.
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/1f0f96acace72790ecf89087fc765dead960189e.1731495873.git.leon@kernel.org
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Kamal Heib <kheib@redhat.com>
JIRA: https://issues.redhat.com/browse/RHEL-77880
commit 0492458750c9fbd69cfc7baddd3ddcac77f2a0c8
Author: Sean Hefty <shefty@nvidia.com>
Date: Wed Nov 13 13:12:54 2024 +0200
IB/cm: Explicitly mark if a response MAD is a retransmission
In several situations the CM may send a reply to a received MAD
without the reply being directly linked with a cm_id. For
example, it may send a REJ in response to a REQ which does not
match a listener. Or, it may send a DREP in response to a DREQ
if the cm_id has already been destroyed. This can happen if the
original DREP was lost and the DREQ was retried.
When such a response MAD completes, it updates a counter tracking
how many MADs were retried. However, not all response MADs issued
directly by the CM may be retries. The REJ mentioned in the example
above is such a case. To distinguish between responses which were
retries versus those that are not, the send_handler performs the
following check: is a retry if the response is not associated with
a cm_id and the response is not a REJ message.
Replace this indirect method of checking if a response is a retry
with an explicit check. Note that these retries are generated
directly by the CM, rather than retried by the MAD layer.
This change will be needed by later changes which would otherwise
break the indirect check.
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/1ee6e2a68f8de1992b9da23aa1d7e3f9f25e0036.1731495873.git.leon@kernel.org
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Kamal Heib <kheib@redhat.com>
JIRA: https://issues.redhat.com/browse/RHEL-56247
commit b68e1acb5834ed1a2ad42d9d002815a8bae7c0b6
Author: Mark Zhang <markzhang@nvidia.com>
Date: Fri Mar 22 13:20:49 2024 +0200
RDMA/cm: Print the old state when cm_destroy_id gets timeout
The old state is helpful for debugging, as the current state is always
IB_CM_IDLE when timeout happens.
Fixes: 96d9cbe2f2ff ("RDMA/cm: add timeout to cm_destroy_id wait")
Signed-off-by: Mark Zhang <markzhang@nvidia.com>
Link: https://lore.kernel.org/r/20240322112049.2022994-1-markzhang@nvidia.com
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Kamal Heib <kheib@redhat.com>
JIRA: https://issues.redhat.com/browse/RHEL-56247
commit 96d9cbe2f2ff7abde021bac75eafaceabe9a51fa
Author: Manjunath Patil <manjunath.b.patil@oracle.com>
Date: Fri Mar 8 22:33:23 2024 -0800
RDMA/cm: add timeout to cm_destroy_id wait
Add timeout to cm_destroy_id, so that userspace can trigger any data
collection that would help in analyzing the cause of delay in destroying
the cm_id.
New noinline function helps dtrace/ebpf programs to hook on to it.
Existing functionality isn't changed except triggering a probe-able new
function at every timeout interval.
We have seen cases where CM messages stuck with MAD layer (either due to
software bug or faulty HCA), leading to cm_id getting stuck in the
following call stack. This patch helps in resolving such issues faster.
kernel: ... INFO: task XXXX:56778 blocked for more than 120 seconds.
...
Call Trace:
__schedule+0x2bc/0x895
schedule+0x36/0x7c
schedule_timeout+0x1f6/0x31f
? __slab_free+0x19c/0x2ba
wait_for_completion+0x12b/0x18a
? wake_up_q+0x80/0x73
cm_destroy_id+0x345/0x610 [ib_cm]
ib_destroy_cm_id+0x10/0x20 [ib_cm]
rdma_destroy_id+0xa8/0x300 [rdma_cm]
ucma_destroy_id+0x13e/0x190 [rdma_ucm]
ucma_write+0xe0/0x160 [rdma_ucm]
__vfs_write+0x3a/0x16d
vfs_write+0xb2/0x1a1
? syscall_trace_enter+0x1ce/0x2b8
SyS_write+0x5c/0xd3
do_syscall_64+0x79/0x1b9
entry_SYSCALL_64_after_hwframe+0x16d/0x0
Signed-off-by: Manjunath Patil <manjunath.b.patil@oracle.com>
Link: https://lore.kernel.org/r/20240309063323.458102-1-manjunath.b.patil@oracle.com
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Kamal Heib <kheib@redhat.com>
JIRA: https://issues.redhat.com/browse/RHEL-956
commit bd9de1badac7e4ff6780365d4aa38983f5e2a436
Author: Mark Zhang <markzhang@nvidia.com>
Date: Thu Mar 30 10:23:51 2023 +0300
RDMA/cm: Trace icm_send_rej event before the cm state is reset
Trace icm_send_rej event before the cm state is reset to idle, so that
correct cm state will be logged. For example when an incoming request is
rejected, the old trace log was:
icm_send_rej: local_id=961102742 remote_id=3829151631 state=IDLE reason=REJ_CONSUMER_DEFINED
With this patch:
icm_send_rej: local_id=312971016 remote_id=3778819983 state=MRA_REQ_SENT reason=REJ_CONSUMER_DEFINED
Fixes: 8dc105befe ("RDMA/cm: Add tracepoints to track MAD send operations")
Signed-off-by: Mark Zhang <markzhang@nvidia.com>
Link: https://lore.kernel.org/r/20230330072351.481200-1-markzhang@nvidia.com
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Kamal Heib <kheib@redhat.com>
Bugzilla: https://bugzilla.redhat.com/2168936
commit 8b4d379b399d19f4c803e565bfe13f07b66b5ad7
Author: Li Zhijian <lizhijian@fujitsu.com>
Date: Tue Dec 6 21:02:00 2022 +0800
RDMA/cm: Make QP FLUSHABLE for supported device
Similar to RDMA and Atomic qp attributes enabled by default in CM, enable
FLUSH attribute for supported device. That makes applications that are
built with rdma_create_ep, rdma_accept APIs have FLUSH qp attribute
natively so that user is able to request FLUSH operation simpler.
Note that, a FLUSH operation requires FLUSH are supported by both
device(HCA) and memory region(MR) and QP at the same time, so it's safe
to enable FLUSH qp attribute by default here.
FLUSH attribute can be disable by modify_qp() interface.
Link: https://lore.kernel.org/r/20221206130201.30986-10-lizhijian@fujitsu.com
Signed-off-by: Li Zhijian <lizhijian@fujitsu.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Kamal Heib <kheib@redhat.com>
Bugzilla: https://bugzilla.redhat.com/2168933
commit eb8336dbe373edd1ad6061c543e4ba6ea60f6cc9
Author: Mark Zhang <markzhang@nvidia.com>
Date: Thu Sep 8 13:09:03 2022 +0300
RDMA/cm: Use DLID from inbound/outbound PathRecords as the datapath DLID
In inter-subnet cases, when inbound/outbound PRs are available,
outbound_PR.dlid is used as the requestor's datapath DLID and
inbound_PR.dlid is used as the responder's DLID. The inbound_PR.dlid
is passed to responder side with the "ConnectReq.Primary_Local_Port_LID"
field. With this solution the PERMISSIVE_LID is no longer used in
Primary Local LID field.
Signed-off-by: Mark Zhang <markzhang@nvidia.com>
Reviewed-by: Mark Bloch <mbloch@nvidia.com>
Link: https://lore.kernel.org/r/b3f6cac685bce9dde37c610be82e2c19d9e51d9e.1662631201.git.leonro@nvidia.com
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Kamal Heib <kheib@redhat.com>
Bugzilla: https://bugzilla.redhat.com/2168933
commit 637ff8ea00a20dd731110c9cdbef0e41c050607d
Author: Mark Zhang <markzhang@nvidia.com>
Date: Fri Aug 19 12:08:59 2022 +0300
IB/cm: Refactor cm_insert_listen() and cm_find_listen()
Move the device and service_id match code at the top of
cm_insert_listen() and cm_find_listen() into the final else branch.
Link: https://lore.kernel.org/r/20220819090859.957943-4-markzhang@nvidia.com
Signed-off-by: Mark Zhang <markzhang@nvidia.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Kamal Heib <kheib@redhat.com>
Bugzilla: https://bugzilla.redhat.com/2168933
commit a461b746c5768b9b3001045cff2d508346f5f789
Author: Mark Zhang <markzhang@nvidia.com>
Date: Fri Aug 19 12:08:58 2022 +0300
IB/cm: remove cm_id_priv->id.service_mask and service_mask parameter of cm_init_listen()
The service_mask is always ~cpu_to_be64(0), so the result is always
a NOP when it is &'d with a service_id. Remove it for simplicity.
Link: https://lore.kernel.org/r/20220819090859.957943-3-markzhang@nvidia.com
Signed-off-by: Mark Zhang <markzhang@nvidia.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Kamal Heib <kheib@redhat.com>
Bugzilla: https://bugzilla.redhat.com/2168933
commit 91a3f14ec953f3224215dc867001b9a201785740
Author: Mark Zhang <markzhang@nvidia.com>
Date: Fri Aug 19 12:08:57 2022 +0300
IB/cm: Remove the service_mask parameter from ib_cm_listen()
Remove the service_mask parameter of ib_cm_listen(), as all callers
use 0.
Link: https://lore.kernel.org/r/20220819090859.957943-2-markzhang@nvidia.com
Signed-off-by: Mark Zhang <markzhang@nvidia.com>
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Kamal Heib <kheib@redhat.com>
Bugzilla: https://bugzilla.redhat.com/2120668
commit b7d95040c13f61a4a6a859c5355faf583eff9658
Author: Mark Zhang <markzhang@nvidia.com>
Date: Thu Sep 8 13:09:02 2022 +0300
RDMA/cm: Use SLID in the work completion as the DLID in responder side
The responder should always use WC's SLID as the dlid, to follow the
IB SPEC section "13.5.4.2 COMMON RESPONSE ACTIONS":
A responder always takes the following actions in constructing a
response packet:
- The SLID of the received packet is used as the DLID in the response
packet.
Fixes: ac3a949fb2 ("IB/CM: Set appropriate slid and dlid when handling CM request")
Signed-off-by: Mark Zhang <markzhang@nvidia.com>
Reviewed-by: Mark Bloch <mbloch@nvidia.com>
Link: https://lore.kernel.org/r/cd17c240231e059d2fc07c17dfe555d548b917eb.1662631201.git.leonro@nvidia.com
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Kamal Heib <kheib@redhat.com>
Bugzilla: http://bugzilla.redhat.com/2097326
commit 2990f223ffa7bb25422956b9f79f9176a5b38346
Author: Miaoqian Lin <linmq006@gmail.com>
Date: Tue Jun 21 09:25:44 2022 +0400
RDMA/cm: Fix memory leak in ib_cm_insert_listen
cm_alloc_id_priv() allocates resource for the cm_id_priv. When
cm_init_listen() fails it doesn't free it, leading to memory leak.
Add the missing error unwind.
Fixes: 98f67156a8 ("RDMA/cm: Simplify establishing a listen cm_id")
Link: https://lore.kernel.org/r/20220621052546.4821-1-linmq006@gmail.com
Signed-off-by: Miaoqian Lin <linmq006@gmail.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Kamal Heib <kheib@redhat.com>
Bugzilla: http://bugzilla.redhat.com/2056772
commit 107dd7beba403a363adfeb3ffe3734fe38a05cce
Author: Mark Zhang <markzhang@nvidia.com>
Date: Mon Apr 4 11:58:05 2022 +0300
IB/cm: Cancel mad on the DREQ event when the state is MRA_REP_RCVD
On the passive side when the disconnectReq event comes, if the current
state is MRA_REP_RCVD, it needs to cancel the MAD before entering the
DREQ_RCVD and TIMEWAIT states, otherwise the destroy_id may block until
this mad will reach timeout.
Fixes: a977049dac ("[PATCH] IB: Add the kernel CM implementation")
Link: https://lore.kernel.org/r/75261c00c1d82128b1d981af9ff46e994186e621.1649062436.git.leonro@nvidia.com
Signed-off-by: Mark Zhang <markzhang@nvidia.com>
Reviewed-by: Maor Gottlieb <maorg@nvidia.com>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Kamal Heib <kheib@redhat.com>
Bugzilla: http://bugzilla.redhat.com/2056771
commit b856101a1774b5f1c8c99e8dfdef802856520732
Author: Mark Zhang <markzhang@nvidia.com>
Date: Wed Jan 19 10:37:55 2022 +0200
IB/cm: Release previously acquired reference counter in the cm_id_priv
In failure flow, the reference counter acquired was not released,
and the following error was reported:
drivers/infiniband/core/cm.c:3373 cm_lap_handler() warn: inconsistent
refcounting 'cm_id_priv->refcount.refs.counter':
Fixes: 7345201c39 ("IB/cm: Improve the calling of cm_init_av_for_lap and cm_init_av_by_path")
Link: https://lore.kernel.org/r/7615f23bbb5c5b66d03f6fa13e1c99d51dae6916.1642581448.git.leonro@nvidia.com
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Mark Zhang <markzhang@nvidia.com>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Kamal Heib <kheib@redhat.com>
This code is trying to attach a list of counters grouped into 4 groups to
the ib_port sysfs. Instead of creating a bunch of kobjects simply express
everything naturally as an ib_port_attribute and add a single
attribute_groups list.
Remove all the naked kobject manipulations.
Link: https://lore.kernel.org/r/0d5a7241ee0fe66622de04fcbaafaf6a791d5c7c.1623427137.git.leonro@nvidia.com
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
It turns out this is only being used to store the LID for SIDR mode to
search the RB tree for request de-duplication. Store the LID value
directly and don't pretend it is a GID.
Link: https://lore.kernel.org/r/2e7c87b6f662c90c642fc1838e363ad3e6ef14a4.1623236345.git.leonro@nvidia.com
Reviewed-by: Mark Zhang <markzhang@nvidia.com>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
During cm_dev deregistration in cm_remove_one(), the cm_device and
cm_ports will be freed, after that they should not be accessed. The
mad_agent needs to be protected as well.
This patch adds a cm_device kref to protect cm_dev and cm_ports, and a
mad_agent_lock spinlock to protect mad_agent.
Link: https://lore.kernel.org/r/501ba7a2ff203dccd0e6755d3f93329772adce52.1622629024.git.leonro@nvidia.com
Signed-off-by: Mark Zhang <markzhang@nvidia.com>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
The cm_init_av_for_lap() and cm_init_av_by_path() function calls have the
following issues:
1. Both of them might sleep and should not be called under spinlock.
2. The access of cm_id_priv->av should be under cm_id_priv->lock, which
means it can't be initialized directly.
This patch splits the calling of 2 functions into two parts: first one
initializes an AV outside of the spinlock, the second one copies AV to
cm_id_priv->av under spinlock.
Fixes: e1444b5a16 ("IB/cm: Fix automatic path migration support")
Link: https://lore.kernel.org/r/038fb8ad932869b4548b0c7708cab7f76af06f18.1622629024.git.leonro@nvidia.com
Signed-off-by: Mark Zhang <markzhang@nvidia.com>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
This reverts commit 9db0ff53cb, which wasn't
a full fix and still causes to the following panic:
panic @ time 1605623870.843, thread 0xfffffeb63b552000: vm_fault_lookup: fault on nofault entry, addr: 0xfffffe811a94e000
time = 1605623870
cpuid = 9, TSC = 0xb7937acc1b6
Panic occurred in module kernel loaded at 0xffffffff80200000:Stack: --------------------------------------------------
kernel:vm_fault+0x19da
kernel:vm_fault_trap+0x6e
kernel:trap_pfault+0x1f1
kernel:trap+0x31e
kernel:cm_destroy_id+0x38c
kernel:rdma_destroy_id+0x127
kernel:sdp_shutdown_task+0x3ae
kernel:taskqueue_run_locked+0x10b
kernel:taskqueue_thread_loop+0x87
kernel:fork_exit+0x83
Link: https://lore.kernel.org/r/4346449a7cdacc7a4eedc89cb1b42d8434ec9814.1622629024.git.leonro@nvidia.com
Signed-off-by: Mark Zhang <markzhang@nvidia.com>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Now that all the free paths are explicit cm_free_msg() will only be called
for msgs's allocated with cm_alloc_msg(), so we can assume the context is
set. Place it after the allocation function it is paired with for clarity.
Also remove a bogus NULL assignment in one place after a cancel. This does
nothing other than disable completions to become events, but changing the
state already did that.
Link: https://lore.kernel.org/r/082fd3552be0d1a2c19b1c4cefb5f3f0e3e68e82.1622629024.git.leonro@nvidia.com
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
There are now three destroy functions for the cm_msg, and all places
except the general send completion handler use the correct function.
Fix cm_send_handler() to detect which kind of message is being completed
and destroy it using the correct function with the correct locking.
Link: https://lore.kernel.org/r/62a507195b8db85bb11228d0c6e7fa944204bf12.1622629024.git.leonro@nvidia.com
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
This is being used with two quite different flows, one attaches the
message to the priv and the other does not.
Ensure the message attach is consistently done under the spinlock and
ensure that the free on error always detaches the message from the
cm_id_priv, also always under lock.
This makes read/write to the cm_id_priv->msg consistently locked and
consistently NULL'd when the message is freed, even in all error paths.
Link: https://lore.kernel.org/r/f692b8c89eecb34fd82244f317e478bea6c97688.1622629024.git.leonro@nvidia.com
Signed-off-by: Mark Zhang <markzhang@nvidia.com>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
This is not a functional change, but it helps make the purpose of all the
cm_free_msg() calls clearer. In this case a response msg has a NULL
context[0], and is never placed in cm_id_priv->msg.
Link: https://lore.kernel.org/r/5cd53163be7df0a94f0d4ef7294546bc674fb74a.1622629024.git.leonro@nvidia.com
Signed-off-by: Mark Zhang <markzhang@nvidia.com>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
In cm_req_handler(), unify the check for RoCE and re-factor to avoid
one test.
Link: https://lore.kernel.org/r/1617705423-15570-1-git-send-email-haakon.bugge@oracle.com
Suggested-by: Jason Gunthorpe <jgg@nvidia.com>
Fixes: 8f97486024 ("IB/cm: Reduce dependency on gid attribute ndev check")
Fixes: 194f64a3ca ("RDMA/core: Fix corrupted SL on passive side")
Signed-off-by: Håkon Bugge <haakon.bugge@oracle.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Block comments should not use a trailing */ on a separate line and every
line of a block comment should start with an '*'.
Link: https://lore.kernel.org/r/1617783353-48249-7-git-send-email-liweihang@huawei.com
Signed-off-by: Wenpeng Liang <liangwenpeng@huawei.com>
Signed-off-by: Weihang Li <liweihang@huawei.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Do following cleanups about braces:
- Add the necessary braces to maintain context alignment.
- Fix the open '{' that is not on the same line as "switch".
- Remove braces that are not necessary for single statement blocks.
- Fix "else" that doesn't follow close brace '}'.
Link: https://lore.kernel.org/r/1617783353-48249-6-git-send-email-liweihang@huawei.com
Signed-off-by: Wenpeng Liang <liangwenpeng@huawei.com>
Signed-off-by: Weihang Li <liweihang@huawei.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Space is not required after '(', before ')', before ',' and between '*'
and symbol name of a definition.
Link: https://lore.kernel.org/r/1617783353-48249-5-git-send-email-liweihang@huawei.com
Signed-off-by: Wenpeng Liang <liangwenpeng@huawei.com>
Signed-off-by: Weihang Li <liweihang@huawei.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
On RoCE systems, a CM REQ contains a Primary Hop Limit > 1 and Primary
Subnet Local is zero.
In cm_req_handler(), the cm_process_routed_req() function is called. Since
the Primary Subnet Local value is zero in the request, and since this is
RoCE (Primary Local LID is permissive), the following statement will be
executed:
IBA_SET(CM_REQ_PRIMARY_SL, req_msg, wc->sl);
This corrupts SL in req_msg if it was different from zero. In other words,
a request to setup a connection using an SL != zero, will not be honored,
and a connection using SL zero will be created instead.
Fixed by not calling cm_process_routed_req() on RoCE systems, the
cm_process_route_req() is only for IB anyhow.
Fixes: 3971c9f6db ("IB/cm: Add interim support for routed paths")
Link: https://lore.kernel.org/r/1616420132-31005-1-git-send-email-haakon.bugge@oracle.com
Signed-off-by: Håkon Bugge <haakon.bugge@oracle.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Current code uses many different types when dealing with a port of a RDMA
device: u8, unsigned int and u32. Switch to u32 to clean up the logic.
This allows us to make (at least) the core view consistent and use the
same type. Unfortunately not all places can be converted. Many uverbs
functions expect port to be u8 so keep those places in order not to break
UAPIs. HW/Spec defined values must also not be changed.
With the switch to u32 we now can support devices with more than 255
ports. U32_MAX is reserved to make control logic a bit easier to deal
with. As a device with U32_MAX ports probably isn't going to happen any
time soon this seems like a non issue.
When a device with more than 255 ports is created uverbs will report the
RDMA device as having 255 ports as this is the max currently supported.
The verbs interface is not changed yet because the IBTA spec limits the
port size in too many places to be u8 and all applications that relies in
verbs won't be able to cope with this change. At this stage, we are
extending the interfaces that are using vendor channel solely
Once the limitation is lifted mlx5 in switchdev mode will be able to have
thousands of SFs created by the device. As the only instance of an RDMA
device that reports more than 255 ports will be a representor device and
it exposes itself as a RAW Ethernet only device CM/MAD/IPoIB and other
ULPs aren't effected by this change and their sysfs/interfaces that are
exposes to userspace can remain unchanged.
While here cleanup some alignment issues and remove unneeded sanity
checks (mainly in rdmavt),
Link: https://lore.kernel.org/r/20210301070420.439400-1-leon@kernel.org
Signed-off-by: Mark Bloch <mbloch@nvidia.com>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
ib_send_cm_sidr_rep() {
spin_lock_irqsave()
cm_send_sidr_rep_locked() {
...
spin_lock_irq()
....
spin_unlock_irq() <--- this will enable interrupts
}
spin_unlock_irqrestore()
}
spin_unlock_irqrestore() expects interrupts to be disabled but the
internal spin_unlock_irq() will always enable hard interrupts.
Fix this by replacing the internal spin_{lock,unlock}_irq() with
irqsave/restore variants.
It fixes the following kernel trace:
raw_local_irq_restore() called with IRQs enabled
WARNING: CPU: 2 PID: 20001 at kernel/locking/irqflag-debug.c:10 warn_bogus_irq_restore+0x1d/0x20
Call Trace:
_raw_spin_unlock_irqrestore+0x4e/0x50
ib_send_cm_sidr_rep+0x3a/0x50 [ib_cm]
cma_send_sidr_rep+0xa1/0x160 [rdma_cm]
rdma_accept+0x25e/0x350 [rdma_cm]
ucma_accept+0x132/0x1cc [rdma_ucm]
ucma_write+0xbf/0x140 [rdma_ucm]
vfs_write+0xc1/0x340
ksys_write+0xb3/0xe0
do_syscall_64+0x2d/0x40
entry_SYSCALL_64_after_hwframe+0x44/0xae
Fixes: 87c4c774cb ("RDMA/cm: Protect access to remote_sidr_table")
Link: https://lore.kernel.org/r/20210301081844.445823-1-leon@kernel.org
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
When RDMA device has 255 ports, loop iterator i overflows. Due to which
cm_add_one() port iterator loops infinitely. Use core provided port
iterator to avoid the infinite loop.
Fixes: a977049dac ("[PATCH] IB: Add the kernel CM implementation")
Link: https://lore.kernel.org/r/20210127150010.1876121-9-leon@kernel.org
Signed-off-by: Mark Bloch <mbloch@nvidia.com>
Signed-off-by: Parav Pandit <parav@nvidia.com>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
A smaller set of patches, nothing stands out as being particularly major
this cycle:
- Driver bug fixes and updates: bnxt_re, cxgb4, rxe, hns, i40iw, cxgb4,
mlx4 and mlx5
- Bug fixes and polishing for the new rts ULP
- Cleanup of uverbs checking for allowed driver operations
- Use sysfs_emit all over the place
- Lots of bug fixes and clarity improvements for hns
- hip09 support for hns
- NDR and 50/100Gb signaling rates
- Remove dma_virt_ops and go back to using the IB DMA wrappers
- mlx5 optimizations for contiguous DMA regions
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Merge tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma
Pull rdma updates from Jason Gunthorpe:
"A smaller set of patches, nothing stands out as being particularly
major this cycle. The biggest item would be the new HIP09 HW support
from HNS, otherwise it was pretty quiet for new work here:
- Driver bug fixes and updates: bnxt_re, cxgb4, rxe, hns, i40iw,
cxgb4, mlx4 and mlx5
- Bug fixes and polishing for the new rts ULP
- Cleanup of uverbs checking for allowed driver operations
- Use sysfs_emit all over the place
- Lots of bug fixes and clarity improvements for hns
- hip09 support for hns
- NDR and 50/100Gb signaling rates
- Remove dma_virt_ops and go back to using the IB DMA wrappers
- mlx5 optimizations for contiguous DMA regions"
* tag 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rdma/rdma: (147 commits)
RDMA/cma: Don't overwrite sgid_attr after device is released
RDMA/mlx5: Fix MR cache memory leak
RDMA/rxe: Use acquire/release for memory ordering
RDMA/hns: Simplify AEQE process for different types of queue
RDMA/hns: Fix inaccurate prints
RDMA/hns: Fix incorrect symbol types
RDMA/hns: Clear redundant variable initialization
RDMA/hns: Fix coding style issues
RDMA/hns: Remove unnecessary access right set during INIT2INIT
RDMA/hns: WARN_ON if get a reserved sl from users
RDMA/hns: Avoid filling sl in high 3 bits of vlan_id
RDMA/hns: Do shift on traffic class when using RoCEv2
RDMA/hns: Normalization the judgment of some features
RDMA/hns: Limit the length of data copied between kernel and userspace
RDMA/mlx4: Remove bogus dev_base_lock usage
RDMA/uverbs: Fix incorrect variable type
RDMA/core: Do not indicate device ready when device enablement fails
RDMA/core: Clean up cq pool mechanism
RDMA/core: Update kernel documentation for ib_create_named_qp()
MAINTAINERS: SOFT-ROCE: Change Zhu Yanjun's email address
...
The xarray is never mutated from an IRQ handler, only from work queues
under a spinlock_irq. Thus there is no reason for it be an IRQ type
xarray.
This was copied over from the original IDR code, but the recent rework put
the xarray inside another spinlock_irq which will unbalance the unlocking.
Fixes: c206f8bad1 ("RDMA/cm: Make it clearer how concurrency works in cm_req_handler()")
Link: https://lore.kernel.org/r/0-v1-808b6da3bd3f+1857-cm_xarray_no_irq_jgg@nvidia.com
Reported-by: Matthew Wilcox <willy@infradead.org>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
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Merge tag 'v5.9-rc3' into rdma.git for-next
Required due to dependencies in following patches.
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
In the interest of converging on a common instrumentation infrastructure,
modernize the pr_debug() call sites added by commit 119bf81793 ("IB/cm:
Add debug prints to ib_cm"). The new tracepoints appear in a new "ib_cma"
subsystem.
The conversion is somewhat mechanical. Someone more familiar with the
semantics of the recorded information might suggest additional data
capture.
Some benefits include:
- Tracepoints enable "always on" reporting of these errors
- The error records are structured and compact
- Tracepoints provide hooks for eBPF scripts
Sample output:
nfsd-1954 [003] 62.017901: icm_dreq_skipped: local_id=1998890974 remote_id=1129750393 state=DREQ_RCVD lap_state=LAP_UNINIT
Link: https://lore.kernel.org/r/159767239665.2968.10613294222688696646.stgit@klimt.1015granger.net
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Fix the following sparse error by adding annotation to
cm_queue_work_unlock() that it releases cm_id_priv->lock lock.
drivers/infiniband/core/cm.c:936:24: warning: context imbalance in
'cm_queue_work_unlock' - unexpected unlock
Fixes: e83f195aa4 ("RDMA/cm: Pull duplicated code into cm_queue_work_unlock()")
Link: https://lore.kernel.org/r/20200611130045.1994026-1-leon@kernel.org
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
If the cm_id state is IB_CM_REP_SENT when cm_destroy_id() is called, it
calls cm_send_rej_locked().
In cm_send_rej_locked(), it calls cm_enter_timewait() and the state is
changed to IB_CM_TIMEWAIT.
Now back to cm_destroy_id(), it breaks from the switch statement, and the
next call is WARN_ON(cm_id->state != IB_CM_IDLE).
This triggers a spurious warning. Instead, the code should goto retest
after returning from cm_send_rej_locked() to move the state to IDLE.
Fixes: 67b3c8dcea ("RDMA/cm: Make sure the cm_id is in the IB_CM_IDLE state in destroy")
Link: https://lore.kernel.org/r/1591191218-9446-1-git-send-email-ka-cheong.poon@oracle.com
Signed-off-by: Ka-Cheong Poon <ka-cheong.poon@oracle.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
ECE parameters are exchanged through REQ->REP/SIDR_REP messages, this
patch adds the data to provide to other side of CMID communication
channel.
Link: https://lore.kernel.org/r/20200526103304.196371-5-leon@kernel.org
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Kamal Heib
Wenpeng Liang
Jason Gunthorpe
Mark Zhang
Håkon Bugge
Mark Bloch
Saeed Mahameed
Parav Pandit
Linus Torvalds
Leon Romanovsky
Mauro Carvalho Chehab
Joe Perches
Chuck Lever
Gustavo A. R. Silva
Maor Gottlieb
Leon Romanovsky
Ka-Cheong Poon