The attempt to join multicast group without ensuring that CMA device
exists will lead to the following crash reported by syzkaller.
Linux commit:
7688f2c3bbf55e52388e37ac5d63ca471a7712e1
MFC after: 1 week
Sponsored by: Mellanox Technologies
Prior to access UCMA commands, the context should be initialized
and connected to CM_ID with ucma_create_id(). In case user skips
this step, he can provide non-valid ctx without CM_ID and cause
to multiple NULL dereferences.
Also there are situations where the create_id can be raced with
other user access, ensure that the context is only shared to
other threads once it is fully initialized to avoid the races.
Linux commit:
e8980d67d6017c8eee8f9c35f782c4bd68e004c9
MFC after: 1 week
Sponsored by: Mellanox Technologies
When receiving a PCP change all GID entries are reloaded.
This ensures the relevant GID entries use prio tagging,
by setting VLAN present and VLAN ID to zero.
The priority for prio tagged traffic is set using the regular
rdma_set_service_type() function.
Fake the real network device to have a VLAN ID of zero
when prio tagging is enabled. This is logic is hidden inside
the rdma_vlan_dev_vlan_id() function which must always be used
to retrieve the VLAN ID throughout all of ibcore and the
infiniband network drivers.
The VLAN presence information then propagates through all
of ibcore and so incoming connections will have the VLAN
bit set. The incoming VLAN ID is then checked against the
return value of rdma_vlan_dev_vlan_id().
MFC after: 1 week
Sponsored by: Mellanox Technologies
cma_iboe_set_mgid() is updated to reflect the RoCEv2 GID check.
Linux commit:
5c181bda77f409d89ad513528eccac5f3a416474
MFC after: 1 week
Sponsored by: Mellanox Technologies
RoCEv2 Annex states that for RoCEv2 over IPv4, the corresponding
IPv4 address is encoded into the GID according to the following rule:
GID= :ffff:<IPv4 address>
Remove the 0xff0e prefix for RoCEv2 packets with IPv4 and leave it
zeroed and change rdma_is_multicast_addr() to consider the new logic.
Linux commit:
be1d325a335840a86c133a56c6a911c368bac0fd
1c3aea2bc8f0b2e5b57375ead40457ff75a3a2ec
MFC after: 1 week
Sponsored by: Mellanox Technologies
The Infiniband spec defines "A multicast address is defined by a
MGID and a MLID" (section 10.5).
Add check to verify that the MLID value is in the correct address
range.
RoCE Annex (A16.9.10/11) declares that during attach (detach) QP to a
multicast group, if the QP is associated with a RoCE port, the
multicast group MLID is unused and is ignored.
During attach or detach multicast, when the QP is associated with a
port, it is enough to check the port's link layer and validate the
LID only if it is Infiniband. Otherwise, avoid validating the
multicast LID.
Linux commit:
8561eae60ff9417a50fa1fb2b83ae950dc5c1e21
5236333592244557a19694a51337df6ac018f0a7
MFC after: 1 week
Sponsored by: Mellanox Technologies
Implement a more generic solution for detecting loopback.
The problem was that the default netdevice was resolved
for loopback also when VLAN was used. Use real network
device instead of loopback device for bound device
interface.
How to test:
ucmatose -b 127.0.0.1 -p 20090
ucmatose -s 5.6.5.1 -p 20090
Note that RDMA treats the IPv4 and IPv6 loopback
addresses like any address.
MFC after: 1 week
Sponsored by: Mellanox Technologies
A list of MGID/MLID pairs is built when doing a multicast attach. When
the multicast detach is called, the list is searched, and regardless of
the search outcome, the driver detach is called.
If an MGID/MLID pair is not on the list, driver detach should not be
called, and an error should be returned. Calling the driver without
removing an MGID/MLID pair from the list can leave the core and driver
out of sync.
Linux commit:
20c7840a77ddcb2ed2fbd66e8197db2868495751
MFC after: 1 week
Sponsored by: Mellanox Technologies
When two handlers used the same object in the old schema, we blocked
the process in the kernel. The new schema just returns -EBUSY. This
could lead to different behaviour in applications between the old
schema and the new schema. In most cases, using such handlers
concurrently could lead to crashing the process. For example, if
thread A destroys a QP and thread B modifies it, we could have the
destruction happens before the modification. In this case, we are
accessing freed memory which could lead to crashing the process.
This is true for most cases. However, attaching and detaching
a multicast address from QP concurrently is safe. Therefore, we
preserve the original behaviour by adding a lock there.
Linux commit:
f48b726920d96dcd1860df06143bdea7d6d7dcc3
MFC after: 1 week
Sponsored by: Mellanox Technologies
When resolving an IP address in ibcore, only update the source address
upon normal completion. The ibcore address resolve function does not
care about the scope ID value of the IPv6 link-local addresses and expects
this information has already been extracted into the bound_dev_if field.
Because the same IPv6 link-local address can exist on multiple interfaces
the ibcore address resolver gets confused and returns ENETUNREACH.
Instead of updating both source address and bound_dev_if just keep the
address set to any address until resolving completes. For the sake of code
symmetry a similar change has been applied to the IPv4 address resolve path.
MFC after: 1 week
Sponsored by: Mellanox Technologies
When setting a large address resolve timeout it was observed that the
address resolving would succeed at the timeout and not when the address
was available. Make sure the address resolving requests are processed no
slower than one time every second.
While at it use "int" for jiffies instead of "unsigned long" to match
FreeBSD ticks.
MFC after: 1 week
Sponsored by: Mellanox Technologies
VERSREQ < 7.+ physically will not work with new config(8) due to major bump,
which is why I bumped it in the first place... Back to the original version
The ESXi NFSv4.1 client will generate warning messages when the reason for
not issuing a delegation is two. Two refers to a resource limit and I do
not see why it would be considered invalid. However it probably was not the
best choice of reason for not issuing a delegation.
This patch changes the reasons used to ones that the ESXi client doesn't
complain about. This change does not affect the FreeBSD client and does
not appear to affect behaviour of the Linux NFSv4.1 client.
RFC5661 defines these "reasons" but does not give any guidance w.r.t. which
ones are more appropriate to return to a client.
Tested by: andreas.nagy@frequentis.com
PR: 226650
MFC after: 2 weeks
config-generated hints.c/env.c from r335998 and later are incompatible with
earlier kernels due to no longer setting envmode/hintmode. A minor bump for
this is insufficient, as matching major version with a later minor version
is still viewed as backwards-compatible.
This was an MI kernel change, soo all VERSREQ's are bumped.
On arm64 compiler will create PC-relative loads and stores for static data.
This means it doesn't emit a relocation. Unfortunately the in-kernel linker
expects there to be one for DPCPU defines so it can modify its value so the
code will use the correct DPCPU region.
To workaround the lack of a relocation with static data remove it when
building modules on arm64. The kernel is unaffected as it doesn't rely on
modifying these relocations to find the data.
PR: 225684
Reported by: Johannes Lundberg <johalun0@gmail.com>
Reported by: Jose Luis Duran <jlduran@gmail.com>
Reported by: Greg V <greg@unrelenting.technology>
Reviewed by: bz
Sponsored by: ABT Systems Ltd
Differential Revision: https://reviews.freebsd.org/D16145
The armv8crypto module includes arm_neon.h for the compiler intrinsic
functions. This includes the userland stdint.h file that doesn't exist in
the kernel. Fix this by providing an empty stdint.h to be used when we
include arm_neon.h.
Sponsored by: DARPA, AFRL
Differential Revision: https://reviews.freebsd.org/D16254
ig4(4) does not support suspend/resume but present on the hardware where
such functionality is critical, like laptops. Remove PNP info to avoid
breaking suspend/resume on the systems where ig4(4) load is not explicitly
requested by the user.
PR: 229791
Reported by: Ali Abdallah
Without this, the support for transparent superpage promotion on i386
was left disabled.
Reviewed by: alc, kib
Differential Revision: https://reviews.freebsd.org/D16279
A_SETPOLICY is supposed to work with either 64 or 32-bit values, but due to a
typo the 64-bit version has never worked correctly.
Submitted by: aniketp
Reviewed by: asomers, cem
MFC after: 2 weeks
Sponsored by: Google, Inc. (GSoC 2018)
Differential Revision: https://reviews.freebsd.org/D16222
so that a reference from a concurrently destroyed mapping is observed
during the current scan.
Reviewed by: kib, markj
MFC after: 1 week
Differential Revision: https://reviews.freebsd.org/D16277
- Ever since the workaround for the silicon bug of TSO4 causing MAC hangs
was committed in r295133, CSUM_TSO always got disabled unconditionally
by em(4) on the first invocation of em_init_locked(). However, even with
that problem fixed, it turned out that for at least e. g. 82579 not all
necessary TSO workarounds are in place, still causing MAC hangs even at
Gigabit speed. Thus, for stable/11, TSO usage was deliberately disabled
in r323292 (r323293 for stable/10) for the EM-class by default, allowing
users to turn it on if it happens to work with their particular EM MAC
in a Gigabit-only environment.
In head, the TSO workaround for speeds other than Gigabit was lost with
the conversion to iflib(9) in r311849 (possibly along with another one
or two TSO workarounds). Yet at the same time, for EM-class MACs TSO4
got enabled by default again, causing device hangs. Therefore, change the
default for this hardware class back to have TSO4 off, allowing users
to turn it on manually if it happens to work in their environment as
we do in stable/{10,11}. An alternative would be to add a whitelist of
EM-class devices where TSO4 actually is reliable with the workarounds in
place, but given that the advantage of TSO at Gigabit speed is rather
limited - especially with the overhead of these workarounds -, that's
really not worth it. [1]
This change includes the addition of an isc_capabilities to struct
if_softc_ctx so iflib(9) can also handle interface capabilities that
shouldn't be enabled by default which is used to handle the default-off
capabilities of e1000 as suggested by shurd@ and moving their handling
from em_setup_interface() to em_if_attach_pre() accordingly.
- Although 82543 support TSO4 in theory, the former lem(4) didn't have
support for TSO4, presumably because TSO4 is even more broken in the
LEM-class of MACs than the later EM ones. Still, TSO4 for LEM-class
devices was enabled as part of the conversion to iflib(9) in r311849,
causing device hangs. So revert back to the pre-r311849 behavior of
not supporting TSO4 for LEM-class at all, which includes not creating
a TSO DMA tag in iflib(9) for devices not having IFCAP_TSO4 set. [2]
- In fact, the FreeBSD TCP stack can handle a TSO size of IP_MAXPACKET
(65535) rather than FREEBSD_TSO_SIZE_MAX (65518). However, the TSO
DMA must have a maxsize of the maximum TSO size plus the size of a
VLAN header for software VLAN tagging. The iflib(9) converted em(4),
thus, first correctly sets scctx->isc_tx_tso_size_max to EM_TSO_SIZE
in em_if_attach_pre(), but later on overrides it with IP_MAXPACKET
in em_setup_interface() (apparently, left-over from pre-iflib(9)
times). So remove the later and correct iflib(9) to correctly cap
the maximum TSO size reported to the stack at IP_MAXPACKET. While at
it, let iflib(9) use if_sethwtsomax*().
This change includes the addition of isc_tso_max{seg,}size DMA engine
constraints for the TSO DMA tag to struct if_shared_ctx and letting
iflib_txsd_alloc() automatically adjust the maxsize of that tag in case
IFCAP_VLAN_MTU is supported as requested by shurd@.
- Move the if_setifheaderlen(9) call for adjusting the maximum Ethernet
header length from {ixgbe,ixl,ixlv,ixv,em}_setup_interface() to iflib(9)
so adjustment is automatically done in case IFCAP_VLAN_MTU is supported.
As a consequence, this adjustment now is also done in case of bnxt(4)
which missed it previously.
- Move the reduction of the maximum TSO segment count reported to the
stack by the number of m_pullup(9) calls (which in the worst case,
can add another mbuf and, thus, the requirement for another DMA
segment each) in the transmit path for performance reasons from
em_setup_interface() to iflib_txsd_alloc() as these pull-ups are now
done in iflib_parse_header() rather than in the no longer existing
em_xmit(). Moreover, this optimization applies to all drivers using
iflib(9) and not just em(4); all in-tree iflib(9) consumers still
have enough room to handle full size TSO packets. Also, reduce the
adjustment to the maximum number of m_pullup(9)'s now performed in
iflib_parse_header().
- Prior to the conversion of em(4)/igb(4)/lem(4) and ixl(4) to iflib(9)
in r311849 and r335338 respectively, these drivers didn't enable
IFCAP_VLAN_HWFILTER by default due to VLAN events not being passed
through by lagg(4). With iflib(9), IFCAP_VLAN_HWFILTER was turned on
by default but also lagg(4) was fixed in that regard in r203548. So
just remove the now redundant and defunct IFCAP_VLAN_HWFILTER handling
in {em,ixl,ixlv}_setup_interface().
- Nuke other redundant IFCAP_* setting in {em,ixl,ixlv}_setup_interface()
which is (more completely) already done in {em,ixl,ixlv}_if_attach_pre()
now.
- Remove some redundant/dead setting of scctx->isc_tx_csum_flags in
em_if_attach_pre().
- Remove some IFCAP_* duplicated either directly or indirectly (e. g.
via IFCAP_HWCSUM) in {EM,IGB,IXL}_CAPS.
- Don't bother to fiddle with IFCAP_HWSTATS in ixgbe(4)/ixgbev(4) as
iflib(9) adds that capability unconditionally.
- Remove some unused macros from em(4).
- Bump __FreeBSD_version as some of the above changes require the modules
of drivers using iflib(9) to be recompiled.
Okayed by: sbruno@ at 201806 DevSummit Transport Working Group [1]
Reviewed by: sbruno (earlier version), erj
PR: 219428 (part of; comment #10) [1], 220997 (part of; comment #3) [2]
Differential Revision: https://reviews.freebsd.org/D15720
When a NFSv4.1 client mount using pNFS detects a failure trying to do a
Renew (actually just a Sequence operation), the code would simply try
again and again and again every 30sec.
This would tie up the "nfscl" thread, which should also be doing other
things like Renews on other DSs and the MDS.
This patch adds code which closes down the TCP connection and marks it
defunct when Renew detects an failure to communicate with the DS, so
further Renews will not be attempted until a new working TCP connection to
the DS is established.
It also makes the call to nfscl_cancelreqs() unconditional, since
nfscl_cancelreqs() checks the NFSCLDS_SAMECONN flag and does so while holding
the lock.
This fix only applies to the NFSv4.1 client whne using pNFS and without it
the only effect would have been an "nfscl" thread busy doing Renew attempts
on an unresponsive DS.
MFC after: 2 weeks
events are passed through by lagg(4) ever since r203548. Deactivation of
this capability by default due to lagg(4) was already not done for ixgbev(4)
and has been - although inadvertently - broken when em(4)/igb(4)/lem(4) and
ixl(4) were converted to iflib(9) in r311849 and r335338 respectively.
Reviewed by: erj
Differential Revision: https://reviews.freebsd.org/D15720 (part of)
Simple fix to address panics relating to setting IPV6_TCLASS
with setsockopt(). The premise of this change is that it is
ok to call malloc with M_NOWAIT while holding a lock on the
in6p.
If it later turns out that it is not ok, then major surgery
will be required, as ip6_setpktopt() will have to be fixed
(as it also calls malloc with M_NOWAIT) which pulls in the
ip6_pcbopts(), ip6_setpktopts(), ip6_setpktopt() call chain.
Submitted by: Jason Eggnet
Reviewed by: rrs, transport, sbruno
Sponsored by: Limelight Networks
Differential Revision: https://reviews.freebsd.org/D16201
Doing so ensures that all threads sharing the pmap have a consistent
view of the mapping. This fixes the problem described in the commit
log message for r329254 without the overhead of an extra page fault
in the common case. (Now that all pmap_enter() implementations are
similarly modified, the workaround added in r329254 can be removed,
reducing the overhead of COW faults.)
With this change we can reuse the PV entry from the old mapping,
potentially avoiding a call to reclaim_pv_chunk(). Otherwise, there is
nothing preventing the old PV entry from being reclaimed. In rare
cases this could result in the PTE's page table page being freed,
leading to a use-after-free of the page when the updated PTE is written
following the allocation of the PV entry for the new mapping.
Reviewed by: br, markj
MFC after: 3 weeks
Differential Revision: https://reviews.freebsd.org/D16261
Without this patch, the client side NFSv4.1 pNFS code erroneously did writes
and commits to both DS mirrors using the TCP connection of the first one.
For my test setup this worked, since I have both DSs running on the same
machine, but it would have failed when the DSs are on separate machines.
This patch fixes the code to use the correct TCP connection for each DS.
This patch should only affect the NFSv4.1 client when using "pnfs" mounts
to mirrored DSs.
MFC after: 2 weeks
add support for explicitly requesting that pmap_enter() create a 2 or 4 MB
page mapping. (Essentially, this feature allows the machine-independent
layer to create superpage mappings preemptively, and not wait for automatic
promotion to occur.)
Export pmap_ps_enabled() to the machine-independent layer.
Add a flag to pmap_pv_insert_pde() that specifies whether it should fail or
reclaim a PV entry when one is not available.
Refactor pmap_enter_pde() into two functions, one by the same name, that is
a general-purpose function for creating PDE PG_PS mappings, and another,
pmap_enter_4mpage(), that is used to prefault 2 or 4 MB read- and/or
execute-only mappings for execve(2), mmap(2), and shmat(2).
Reviewed by: kib
Tested by: pho
Differential Revision: https://reviews.freebsd.org/D16246
In some cases it seems that the PHY mode can only be identified by
matching against the corresponding device node name in the FDT. r334880
broke this for the case where the node name contains a unit address.
Fix the problem by allowing a match in that case.
Reviewed by: andrew, sbruno
Tested by: sbruno
Differential Revision: https://reviews.freebsd.org/D16259
