The algorithm pre-allocates a cm_id since allocation cannot be done while
holding the cm.lock spinlock, however it doesn't free it on one error
path, leading to a memory leak.
Linux commit:
c14dfddbd869bf0c2bafb7ef260c41d9cebbcfec
PR: 264248
MFC after: 1 week
Sponsored by: NVIDIA Networking
If ib_dma_mapping_error() returns non-zero value,
ib_mad_post_receive_mads() will jump out of loops and return -ENOMEM
without freeing mad_priv. Fix this memory-leak problem by freeing
mad_priv in this case.
Linux commit:
a17f4bed811c60712d8131883cdba11a105d0161
PR: 264057
MFC after: 1 week
Sponsored by: NVIDIA Networking
Since c67f3b8b78 the sockbuf mutexes belong to the containing socket,
and socket buffers just point to it. In 74a68313b5 macros that access
this mutex directly were added. Go over the core socket code and
eliminate code that reaches the mutex by dereferencing the sockbuf
compatibility pointer.
This change requires a KPI change, as some functions were given the
sockbuf pointer only without any hint if it is a receive or send buffer.
This change doesn't cover the whole kernel, many protocols still use
compatibility pointers internally. However, it allows operation of a
protocol that doesn't use them.
Reviewed by: markj
Differential revision: https://reviews.freebsd.org/D35152
Backport from Linux 5.17 (drivers/infiniband/hw/mlx5/fs.c)
This fixes creating flow rules from user-space after the
kernel space update based on Linux 5.7-rc1 .
Sponsored by: NVIDIA Networking
There left only three modules that used dom_init(). And netipsec
was the last one to use dom_destroy().
Differential revision: https://reviews.freebsd.org/D33540
In preparation for moving sockbuf locks into the containing socket,
provide alternative macros for the sockbuf I/O locks:
SOCK_IO_SEND_(UN)LOCK() and SOCK_IO_RECV_(UN)LOCK(). These operate on a
socket rather than a socket buffer. Note that these locks are used only
to prevent concurrent readers and writters from interleaving I/O.
When locking for I/O, return an error if the socket is a listening
socket. Currently the check is racy since the sockbuf sx locks are
destroyed during the transition to a listening socket, but that will no
longer be true after some follow-up changes.
Modify a few places to check for errors from
sblock()/SOCK_IO_(SEND|RECV)_LOCK() where they were not before. In
particular, add checks to sendfile() and sorflush().
Reviewed by: tuexen, gallatin
MFC after: 1 month
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D31657
Implement kernel support for RFC 5549/8950.
* Relax control plane restrictions and allow specifying IPv6 gateways
for IPv4 routes. This behavior is controlled by the
net.route.rib_route_ipv6_nexthop sysctl (on by default).
* Always pass final destination in ro->ro_dst in ip_forward().
* Use ro->ro_dst to exract packet family inside if_output() routines.
Consistently use RO_GET_FAMILY() macro to handle ro=NULL case.
* Pass extracted family to nd6_resolve() to get the LLE with proper encap.
It leverages recent lltable changes committed in c541bd368f.
Presence of the functionality can be checked using ipv4_rfc5549_support feature(3).
Example usage:
route add -net 192.0.0.0/24 -inet6 fe80::5054:ff:fe14:e319%vtnet0
Differential Revision: https://reviews.freebsd.org/D30398
MFC after: 2 weeks
Currently we use pre-calculated headers inside LLE entries as prepend data
for `if_output` functions. Using these headers allows saving some
CPU cycles/memory accesses on the fast path.
However, this approach makes adding L2 header for IPv4 traffic with IPv6
nexthops more complex, as it is not possible to store multiple
pre-calculated headers inside lle. Additionally, the solution space is
limited by the fact that PCB caching saves LLEs in addition to the nexthop.
Thus, add support for creating special "child" LLEs for the purpose of holding
custom family encaps and store mbufs pending resolution. To simplify handling
of those LLEs, store them in a linked-list inside a "parent" (e.g. normal) LLE.
Such LLEs are not visible when iterating LLE table. Their lifecycle is bound
to the "parent" LLE - it is not possible to delete "child" when parent is alive.
Furthermore, "child" LLEs are static (RTF_STATIC), avoding complex state
machine used by the standard LLEs.
nd6_lookup() and nd6_resolve() now accepts an additional argument, family,
allowing to return such child LLEs. This change uses `LLE_SF()` macro which
packs family and flags in a single int field. This is done to simplify merging
back to stable/. Once this code lands, most of the cases will be converted to
use a dedicated `family` parameter.
Differential Revision: https://reviews.freebsd.org/D31379
MFC after: 2 weeks
Overview:
This is the first stage of a RDMA stack upgrade introducing kernel
changes only based on Linux 5.7-rc1.
This patch is based on about four main areas of work:
- Update of the IB uobjects system:
- The memory holding so-called AH, CQ, PD, SRQ and UCONTEXT objects
is now managed by ibcore. This also require some changes in the
kernel verbs API. The updated verbs changes are typically about
initialize and deinitialize objects, and remove allocation and
free of memory.
- Update of the uverbs IOCTL framework:
- The parsing and handling of user-space commands has been
completely refactored to integrate with the updated IB uobjects
system.
- Various changes and updates to the generic uverbs interfaces in
device drivers including the new uAPI surface.
- The mlx5_ib_devx.c in mlx5ib and related mlx5 core changes.
Dependencies:
- The mlx4ib driver code has been updated with the minimum changes
needed.
- The mlx5ib driver code has been updated with the minimum changes
needed including DV support.
Compatibility:
- All user-space facing APIs are backwards compatible after this
change.
- All kernel-space facing RDMA APIs are backwards compatible after
this change, with exception of ib_create_ah() and ib_destroy_ah()
which takes a new flag.
- The "ib_device_ops" structure exist, but only contains the driver ID
and some structure sizes.
Differences from Linux:
- Infiniband drivers must use the INIT_IB_DEVICE_OPS() macro to set
the sizes needed for allocating various IB objects, when adding
IB device instances.
Security:
- PRIV_NET_RAW is needed to use raw ethernet transmit features.
- PRIV_DRIVER is needed to use other privileged operations.
Based on upstream Linux, Torvalds (5.7-rc1):
8632e9b5645bbc2331d21d892b0d6961c1a08429
MFC after: 1 week
Reviewed by: kib
Differential Revision: https://reviews.freebsd.org/D31149
Sponsored by: NVIDIA Networking
Call infiniband_ifdetach() early to stop ifioctl(9) calls from user-space
during device removal. Also make sure that ifioctl(9) calls are blocked from
executing until the device is fully initialized. Ideally we would delay the
infiniband_ifattach() call, but because part of the initialization is to update
the link level address, that is not possible without more significant changes.
MFC after: 1 week
Reviewed by: kib
Sponsored by: Mellanox Technologies // NVIDIA Networking
Since neither ib_post_send() nor ib_post_recv() modify the data structure
their second argument points at, declare that argument const. This change
makes it necessary to declare the 'bad_wr' argument const too and also to
modify all ULPs that call ib_post_send(), ib_post_recv() or
ib_post_srq_recv(). This patch does not change any functionality but makes
it possible for the compiler to verify whether the
ib_post_(send|recv|srq_recv) really do not modify the posted work request.
Linux commit:
f696bf6d64b195b83ca1bdb7cd33c999c9dcf514
7bb1fafc2f163ad03a2007295bb2f57cfdbfb630
d34ac5cd3a73aacd11009c4fc3ba15d7ea62c411
MFC after: 1 week
Reviewed by: kib
Sponsored by: Mellanox Technologies // NVIDIA Networking
Expose ib_ucontext from a given ib_uverbs_file. Drivers that use the ioctl(9)
API may have the ib_uverbs_file and need a way to get the related ib_ucontext
from it, this is enabled by this patch.
Downstream patches from this series will use it.
Linux commit:
7dc08dcfc8c86cb4457e383734ff6844ddaff876
MFC after: 1 week
Reviewed by: kib
Sponsored by: Mellanox Technologies // NVIDIA Networking
We get a harmless warning about the fact that we use the result of a
multiplication as a condition in INIT_UDATA_BUF_OR_NULL():
uverbs_main.c: In function 'ib_uverbs_write':
error: '*' in boolean context, suggest '&&' instead [-Werror=int-in-bool-context]
This avoids the problem by using an inline function in place of
the macro.
After changing INIT_UDATA_BUF_OR_NULL() to an inline function,
do the same change to INIT_UDATA() for consistency.
Using an inline function gives us better type safety here among other
issues with macros. I'm using u64_to_user_ptr() to convert the user
pointer to simplify the logic rather than adding lots of new type casts.
Linux commit:
12f727721eee61b3d19dedb95cb893b2baa9fe41
40a203396cc1c239f2e71c47c66ed03097123d2c
MFC after: 1 week
Reviewed by: kib
Sponsored by: Mellanox Technologies // NVIDIA Networking
All callers to ib_modify_qp_is_ok() provides enum ib_qp_state makes the
checks of out-of-scope redundant. Let's remove them together with updating
function signature to return boolean result.
While at it remove unused "ll" parameter from ib_modify_qp_is_ok().
Linux commit:
19b1f54099b6ee334acbfbcfbdffd1d1f057216d
d31131bba5a1630304c55ea775c48cc84912ab59
MFC after: 1 week
Reviewed by: kib
Sponsored by: Mellanox Technologies // NVIDIA Networking
Add new member rate_limit to ib_qp_attr which holds the packet pacing
rate in kbps, 0 means unlimited.
IB_QP_RATE_LIMIT is added to ib_attr_mask and could be used by RAW
QPs when changing QP state from RTR to RTS, RTS to RTS.
Linux commit:
528e5a1bd3f0e9b760cb3a1062fce7513712a15d
MFC after: 1 week
Reviewed by: kib
Sponsored by: Mellanox Technologies // NVIDIA Networking
Add the new rates that were added to Infiniband spec as part of
HDR and 2x support.
Linux commit:
a5a5d1993696419e7d5357fc3128e53d219d382e
MFC after: 1 week
Reviewed by: kib
Sponsored by: Mellanox Technologies // NVIDIA Networking
There is a race condition between ucma_close() and ucma_resolve_ip():
CPU0 CPU1
ucma_resolve_ip(): ucma_close():
ctx = ucma_get_ctx(file, cmd.id);
list_for_each_entry_safe(ctx, tmp, &file->ctx_list, list) {
mutex_lock(&mut);
idr_remove(&ctx_idr, ctx->id);
mutex_unlock(&mut);
...
mutex_lock(&mut);
if (!ctx->closing) {
mutex_unlock(&mut);
rdma_destroy_id(ctx->cm_id);
...
ucma_free_ctx(ctx);
}
ret = rdma_resolve_addr();
ucma_put_ctx(ctx);
Before idr_remove(), ucma_get_ctx() could still find the ctx
and after rdma_destroy_id(), rdma_resolve_addr() may still
access id_priv pointer. Also, ucma_put_ctx() may use ctx after
ucma_free_ctx() too.
ucma_close() should call ucma_put_ctx() too which tests the
refcnt and waits for the last one releasing it. The similar
pattern is already used by ucma_destroy_id().
Linux commit:
5fe23f262e0548ca7f19fb79f89059a60d087d22
MFC after: 1 week
Reviewed by: kib
Sponsored by: Mellanox Technologies // NVIDIA Networking
Define new option in 'rdma_set_option' to override calculated QP timeout
when requested to provide QP attributes to modify a QP.
At the same time, pack tos_set to be bitfield.
Linux commit:
2c1619edef61a03cb516efaa81750784c3071d10
MFC after: 1 week
Reviewed by: kib
Sponsored by: Mellanox Technologies // NVIDIA Networking
When IPoIB receives an SM LID change event, it reacts by flushing its
path record cache and rejoining multicast groups. This is the same
behavior it performs when it receives a reregistration event. This
behavior is unnecessary as an SM may have database backup or
synchronization mechanisms which permit the SM location or LID to change
without loss of multicast membership and without impact to path records.
Both opensm and the OPA FM issue reregistration events if a new SM is
started (or restarted with a new config) or an SM event occurs which
results in loss of multicast membership records by the SM (such as
opensm failover) or the SM encounters new nodes with Active ports (such
as after joining 2 fabrics by connecting switches via ISLs). Hence this
event can be depended on as the trigger for IPoIB cache and multicast
flushing.
It appears that some drivers, such as qib, and hfi1 issue the
IB_EVENT_SM_CHANGE but other drivers such as mlx4 and mlx5 do not.
Empirical testing on Mellanox EDR using ibv_asyncwatch has confirmed
that Mellanox EDR HCAs do not generate SM change events and that opensm
does generate reregistration.
An SM LID change event is generated by the mentioned drivers to reflect
that sm_lid and/or sm_sl in the local port info has changed. The intent
of this event is to permit applications and ULPs which have a local copy
of this information (or an address handle using it) to update their
information.
The intent is that the reregistration event (caused by the SM via a bit
in Set(PortInfo)) be used to inform nodes that they need to rejoin
multicast groups, resubscribe for notices and potentially update path
records.
When an SM migrates or fails over, a SM LID change event can occur. In
response IPoIB discards path records and multicast membership and loses
connectivity until these records are restored via SA requests. In very
large fabrics, it may take minutes for the SM to be ready and for the SA
responses to be supplied. This can result in undesirable and
unnecessary IPoIB connectivity impacts. It also can result in an
unnecessary storm of SA queries from all nodes in a cluster potentially
followed by yet another storm if the SM issues the reregistration
request.
The fact the Mellanox HCAs do not even generate this event, is further
evidence that on modern IB fabrics there will be no ill side effects
from the proposed changes below to reduce the reaction by 3 kernel
components to this event. So these changes should be benign for Mellanox
IB fabrics and will benefit OPA fabrics while also making ib_core and
ULP behavor "correct" as intended by the IBTA spec and kernel RDMA event
APIs.
Address these issues by removing IB_EVENT_SM_CHANGE handling from ipoib.
IPoIB does not locally store sm_lid nor sm_sl, so it does not need to do
anything on SM LID change. IPoIB makes use of other ib_core components
to issue SA requests for it and those components correctly track SM LID
and SM LID changes.
Also in ib_core multicast handling, remove the test for
IB_EVENT_SM_CHANGE. This code is moving all multicast groups to the
error state, which will trigger rejoins. This code is used by IPoIB as
well as the connection manager and other clients of multicast groups.
This kernel module centralizes group membership status and joins since a
node can only join a given group once but multiple ULPs or applications
may want to join the same group. It makes use of the sa_query.c
component in ib_core, which correctly trackes SM LID and SL. This
component does not track SM LID nor SL itself and hence need not react
to their changes.
Similarly in the ib_core cache code remove the handling for the
IB_EVENT_SM_CHANGE. In this function. The ib_cache_update function
which is ultimately called is updating local copies of the pkey table,
gid table and lmc. It does not update nor retain sm_lid nor sm_sl. As
such it does not need to be called on an SM LID change. It technically
also does not need to be called on a reregistration. The LID_CHANGE,
PKEY_CHANGE, GID_CHANGE and port state change events (PORT_ERR,
PORT_ACTICE) should be sufficient triggers.
It is worth noting that the alternative of simply having the hfi1 and
qib drivers not generate the SM LID change event was explored. While
this would duplicate what Mellanox drivers do now, it is not the correct
behavior and removes the ability for an SM to migrate without requiring
reregistration. Since both opensm and OPA SM have mechanisms to backup
or synchronize registration information, it is desirable to let them
perform SM migrations (with LID or SL changes) without requiring
reregistration when they deem it appropriate.
Linux commit:
ba7d8117f3cca8eb70d579fde3f9ec8cd6a28f39
MFC after: 1 week
Reviewed by: kib
Sponsored by: Mellanox Technologies // NVIDIA Networking
The prints after [k|v][m|z|c]alloc() functions are not needed,
because in case of failure, allocator will print their internal
error prints anyway.
Linux commit:
2716243212241855cd9070883779f6e58967dec5
MFC after: 1 week
Reviewed by: kib
Sponsored by: Mellanox Technologies // NVIDIA Networking
We encountered a use-after-free bug when unloading the driver:
BUG: KASAN: use-after-free in ib_mad_post_receive_mads+0xddc/0xed0 [ib_core]
Read of size 4 at addr ffff8882ca5aa868 by task kworker/u13:2/23862
Workqueue: ib-comp-unb-wq ib_cq_poll_work [ib_core]
Call Trace:
dump_stack+0x9a/0xeb
print_address_description+0xe3/0x2e0
ib_mad_post_receive_mads+0xddc/0xed0 [ib_core]
__kasan_report+0x15c/0x1df
ib_mad_post_receive_mads+0xddc/0xed0 [ib_core]
kasan_report+0xe/0x20
ib_mad_post_receive_mads+0xddc/0xed0 [ib_core]
find_mad_agent+0xa00/0xa00 [ib_core]
qlist_free_all+0x51/0xb0
mlx4_ib_sqp_comp_worker+0x1970/0x1970 [mlx4_ib]
quarantine_reduce+0x1fa/0x270
kasan_unpoison_shadow+0x30/0x40
ib_mad_recv_done+0xdf6/0x3000 [ib_core]
_raw_spin_unlock_irqrestore+0x46/0x70
ib_mad_send_done+0x1810/0x1810 [ib_core]
mlx4_ib_destroy_cq+0x2a0/0x2a0 [mlx4_ib]
_raw_spin_unlock_irqrestore+0x46/0x70
debug_object_deactivate+0x2b9/0x4a0
__ib_process_cq+0xe2/0x1d0 [ib_core]
ib_cq_poll_work+0x45/0xf0 [ib_core]
process_one_work+0x90c/0x1860
pwq_dec_nr_in_flight+0x320/0x320
worker_thread+0x87/0xbb0
__kthread_parkme+0xb6/0x180
process_one_work+0x1860/0x1860
kthread+0x320/0x3e0
kthread_park+0x120/0x120
ret_from_fork+0x24/0x30
...
Freed by task 31682:
save_stack+0x19/0x80
__kasan_slab_free+0x11d/0x160
kfree+0xf5/0x2f0
ib_mad_port_close+0x200/0x380 [ib_core]
ib_mad_remove_device+0xf0/0x230 [ib_core]
remove_client_context+0xa6/0xe0 [ib_core]
disable_device+0x14e/0x260 [ib_core]
__ib_unregister_device+0x79/0x150 [ib_core]
ib_unregister_device+0x21/0x30 [ib_core]
mlx4_ib_remove+0x162/0x690 [mlx4_ib]
mlx4_remove_device+0x204/0x2c0 [mlx4_core]
mlx4_unregister_interface+0x49/0x1d0 [mlx4_core]
mlx4_ib_cleanup+0xc/0x1d [mlx4_ib]
__x64_sys_delete_module+0x2d2/0x400
do_syscall_64+0x95/0x470
entry_SYSCALL_64_after_hwframe+0x49/0xbe
The problem was that the MAD PD was deallocated before the MAD CQ.
There was completion work pending for the CQ when the PD got deallocated.
When the mad completion handling reached procedure
ib_mad_post_receive_mads(), we got a use-after-free bug in the following
line of code in that procedure:
sg_list.lkey = qp_info->port_priv->pd->local_dma_lkey;
(the pd pointer in the above line is no longer valid, because the
pd has been deallocated).
We fix this by allocating the PD before the CQ in procedure
ib_mad_port_open(), and deallocating the PD after freeing the CQ
in procedure ib_mad_port_close().
Since the CQ completion work queue is flushed during ib_free_cq(),
no completions will be pending for that CQ when the PD is later
deallocated.
Note that freeing the CQ before deallocating the PD is the practice
in the ULPs.
Linux commit:
770b7d96cfff6a8bf6c9f261ba6f135dc9edf484
MFC after: 1 week
Reviewed by: kib
Sponsored by: Mellanox Technologies // NVIDIA Networking
When requested QP type is not supported for a {device, port}, return the
error right away before validating all parameters during mad agent
registration time.
Linux commit:
798bba01b44b0ddf8cd6e542635b37cc9a9b739c
MFC after: 1 week
Reviewed by: kib
Sponsored by: Mellanox Technologies // NVIDIA Networking
Before calling the driver's function let's make sure port is valid.
Linux commit:
9af3f5cf9d64a056eca53bc643f6288ad28bbbb5
MFC after: 1 week
Reviewed by: kib
Sponsored by: Mellanox Technologies // NVIDIA Networking
Currently access to hardware stats buffer isn't protected, this can
result in multiple writes and reads at the same time to the same
memory location. This can lead to providing an incorrect value to
the user. Add a mutex to protect against it.
Linux commit:
e945130b52bea65d15f9bdf54949d4cb7a88db7f
MFC after: 1 week
Reviewed by: kib
Sponsored by: Mellanox Technologies // NVIDIA Networking
If the provider driver (such as rdma_rxe) doesn't support PMA counters,
avoid exposing its directory similar to optional hw_counters directory.
If core fails to read the PMA counter, return an error so that user can
retry later if needed.
Linux commit:
0f6ef65d1c6ec8deb5d0f11f86631ec4cfe8f22e
MFC after: 1 week
Reviewed by: kib
Sponsored by: Mellanox Technologies // NVIDIA Networking
In order to improve readability, add ib_port_phys_state enum to replace
the use of magic numbers.
Linux commit:
72a7720fca37fec0daf295923f17ac5d88a613e1
MFC after: 1 week
Reviewed by: kib
Sponsored by: Mellanox Technologies // NVIDIA Networking
This patch fixes the case where 'lifespan' entry of the hw_counters
is not writable. Currently write callback is not exposed for for
the hw_counters sysfs operation. Due to this, modifying lifespan
value results into permission denied error in below example.
echo 10 > /sys/class/infiniband/mlx5_0/ports/1/hw_counters/lifespan
-bash: /sys/class/infiniband/mlx5_0/ports/1/hw_counters/lifespan:
Permission denied
This patch adds the hook to modify any attribute which implements
store() operation.
Linux commit:
79c4d80b43b8e43684894574a508a871f0c196bf
MFC after: 1 week
Reviewed by: kib
Sponsored by: Mellanox Technologies // NVIDIA Networking
From "InfiBand Architecture Specifications Volume 1":
A QP is said to have a stale connection when only one side has
connection information. A stale connection may result if the remote CM
had dropped the connection and sent a DREQ but the DREQ was never
received by the local CM. Alternatively the remote CM may have lost
all record of past connections because its node crashed and rebooted,
while the local CM did not become aware of the remote node's reboot
and therefore did not clean up stale connections.
And:
A local CM may receive a REQ/REP for a stale connection. It shall
abort the connection issuing REJ to the REQ/REP. It shall then issue
DREQ with "DREQ:remote QPN" set to the remote QPN from the REQ/REP.
This patch solves a problem with reuse of QPN. Current codebase, that
is IPoIB, relies on a REAP-mechanism to do cleanup of the structures
in CM. A problem with this is the timeconstants governing this
mechanism; they are up to 768 seconds and the interface may look
inresponsive in that period. Issuing a DREQ (and receiving a DREP)
does the necessary cleanup and the interface comes up.
Linux commit:
9315bc9a133011fdb084f2626b86db3ebb64661f
MFC after: 1 week
Reviewed by: kib
Sponsored by: Mellanox Technologies // NVIDIA Networking
The sysfs layout is created by CM incorrectly presented RDMA devices with
InfiniBand link layer. Layout of such devices represents device tree of
connections. By moving CM statistics to be under relevant port of IB
device, we will fix the following issues:
* Symlink name - It used device name instead of specific identifier.
* Target location - It was supposed to point to PCI-ID/infiniband_cm/
instead of PCI-ID/infiniband/
* Target name - It created extra device file under already existing
device folder, e.g. mlx5_0/mlx5_0
* Crash during boot with RDMA persistent naming patches.
sysfs: cannot create duplicate filename '/class/infiniband_cm/mlx5_0'
CPU: 29 PID: 433 Comm: modprobe Not tainted 5.0.0-rc5+ #178
Call Trace:
dump_stack+0xcc/0x180
sysfs_warn_dup.cold.3+0x17/0x2d
sysfs_do_create_link_sd.isra.2+0xd0/0xf0
device_add+0x7cb/0x1450
device_create_groups_vargs+0x1ae/0x220
device_create+0x93/0xc0
cm_add_one+0x38f/0xf60 [ib_cm]
add_client_context+0x167/0x210 [ib_core]
enable_device_and_get+0x230/0x3f0 [ib_core]
ib_register_device+0x823/0xbf0 [ib_core]
__mlx5_ib_add+0x45/0x150 [mlx5_ib]
mlx5_ib_add+0x1b3/0x5e0 [mlx5_ib]
mlx5_add_device+0x130/0x3a0 [mlx5_core]
mlx5_register_interface+0x1a9/0x270 [mlx5_core]
do_one_initcall+0x14f/0x5de
do_init_module+0x247/0x7c0
load_module+0x4c2f/0x60d0
entry_SYSCALL_64_after_hwframe+0x49/0xbe
After this change:
[leonro@server ~]$ ls -al /sys/class/infiniband/ibp0s12f0/ports/1/
drwxr-xr-x 2 root root 0 Mar 11 11:17 cm_rx_duplicates
drwxr-xr-x 2 root root 0 Mar 11 11:17 cm_rx_msgs
drwxr-xr-x 2 root root 0 Mar 11 11:17 cm_tx_msgs
drwxr-xr-x 2 root root 0 Mar 11 11:17 cm_tx_retries
Linux commit:
c87e65cfb97c7f325132a68288ed76ba7bdcd2c6
MFC after: 1 week
Reviewed by: kib
Sponsored by: Mellanox Technologies // NVIDIA Networking
In the process of moving the debug counters sysfs entries, the commit
mentioned below eliminated the cm_infiniband sysfs directory.
This sysfs directory was tied to the cm_port object allocated in procedure
cm_add_one().
Before the commit below, this cm_port object was freed via a call to
kobject_put(port->kobj) in procedure cm_remove_port_fs().
Since port no longer uses its kobj, kobject_put(port->kobj) was eliminated.
This, however, meant that kfree was never called for the cm_port buffers.
Fix this by adding explicit kfree(port) calls to functions cm_add_one()
and cm_remove_one().
Note that the kfree call in the first chunk below, in the cm_add_one error
flow, fixes an old, undetected memory leak.
Linux commit:
94635c36f3854934a46d9e812e028d4721bbb0e6
MFC after: 1 week
Reviewed by: kib
Sponsored by: Mellanox Technologies // NVIDIA Networking
Due to the below reasons, it is better to not support alternate path receive
messages for RoCE in near term.
1. Alternate path for RoCE is not supported at rdmacm layer.
2. It is not supported in uverbs/core layer for RoCE.
3. Alternate path for IPv6 for link local address cannot resolve route
determinstically without a valid incoming interface ID whose usecase
make sense only with dual port mode.
4. init_av_from_path while processing LAP messages for IB and RoCE can
lead to adding duplicate entry of AV into the port list, leads to list
corruption.
5. rdma-core userspace a well known userspace implementation has removed
support of libucm which use ucm.ko module, which is the only module that
can trigger alternate path related messages.
6. ucm kernel module is requested to be removed from the IB core in
the following patch, https://patchwork.kernel.org/patch/10268503/ .
Linux commit:
97c45c2c28cd291e06778d9d36a0f60ee74726bc
MFC after: 1 week
Reviewed by: kib
Sponsored by: Mellanox Technologies // NVIDIA Networking
During CM LAP processing, ah_attr is reinitialized on receiving
a LAP request. First likely during CM request processing.
ah_attr might get zeroed out if LAP processing fails.
Therefore, try to create a new ah_attr for the LAP message.
If the initialization fails, continue with older ah_attr.
If the initialization passes, consider the new ah_attr by
overwriting the older one.
Linux commit:
0e225dcb7681c0a8e52fb9dc68bd8ab973de4ca2
MFC after: 1 week
Reviewed by: kib
Sponsored by: Mellanox Technologies // NVIDIA Networking
rdma_reject_msg() returns a pointer to a string message associated with
the transport reject reason codes.
Linux commit:
77a5db13153906a7e00740b10b2730e53385c5a8
MFC after: 1 week
Reviewed by: kib
Sponsored by: Mellanox Technologies // NVIDIA Networking
In cm_form_tid(), a two bit message sequence number is OR'ed into bit
31-30 of the lower TID value.
After Linux commit f06d26537559 ("IB/cm: Randomize starting comm ID"), the
local_id is XOR'ed with a 32-bit random value. Hence, bit 31-30 in the
lower TID now has an arbitrarily value and it makes no sense to OR in
the message sequence number.
Adding to that, the evolution in use of IDR routines in cm_alloc_id()
has always had the possibility of returning a value with bit 30 set.
In addition, said bits are never checked.
Hence, remove the encoding and the corresponding enum.
Linux commit:
87a37ce9e400e40daee537ff95343e3c94743c6d
MFC after: 1 week
Reviewed by: kib
Sponsored by: Mellanox Technologies // NVIDIA Networking
Remove not needed error handling when destroying a CQ. The function in
question will later on be updated to return "void".
MFC after: 1 week
Reviewed by: kib
Sponsored by: Mellanox Technologies // NVIDIA Networking
Given all the code does operate on struct ifnet, the last step in this
longer series of changes now is to rename struct net_device to
struct ifnet (that is what it was defined to in the LinuxKPi code).
While mlx4 and OFED are "shared" code the decision was made years ago
to not write it based on the netdevice KPI but the native ifnet KPI
for most of it. This commit simply spells this out and with that
frees "struct netdevice" to be re-done on LinuxKPI to become a more
native/mixed implementation over time as needed by, e.g., wireless
drivers.
Sponsored by: The FreeBSD Foundation
MFC after: 10 days
Reviewed by: hselasky
Differential Revision: https://reviews.freebsd.org/D30515
