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The taprio qdisc does not currently pass the mqprio queue configuration
down to the offloading device driver. So the driver cannot act upon the
TXQ counts/offsets per TC, or upon the prio->tc map. It was probably
assumed that the driver only wants to offload num_tc (see
TC_MQPRIO_HW_OFFLOAD_TCS), which it can get from netdev_get_num_tc(),
but there's clearly more to the mqprio configuration than that.
I've considered 2 mechanisms to remedy that. First is to pass a struct
tc_mqprio_qopt_offload as part of the tc_taprio_qopt_offload. The second
is to make taprio actually call TC_SETUP_QDISC_MQPRIO, *in addition to*
TC_SETUP_QDISC_TAPRIO.
The difference is that in the first case, existing drivers (offloading
or not) all ignore taprio's mqprio portion currently, whereas in the
second case, we could control whether to call TC_SETUP_QDISC_MQPRIO,
based on a new capability. The question is which approach would be
better.
I'm afraid that calling TC_SETUP_QDISC_MQPRIO unconditionally (not based
on a taprio capability bit) would risk introducing regressions. For
example, taprio doesn't populate (or validate) qopt->hw, as well as
mqprio.flags, mqprio.shaper, mqprio.min_rate, mqprio.max_rate.
In comparison, adding a capability is functionally equivalent to just
passing the mqprio in a way that drivers can ignore it, except it's
slightly more complicated to use it (need to set the capability).
Ultimately, what made me go for the "mqprio in taprio" variant was that
it's easier for offloading drivers to interpret the mqprio qopt slightly
differently when it comes from taprio vs when it comes from mqprio,
should that ever become necessary.
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Simon Horman <simon.horman@corigine.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The taprio qdisc will need to reconstruct a struct tc_mqprio_qopt from
netdev settings once more in a future patch, but this code was already
written twice, once in taprio and once in mqprio.
Refactor the code to a helper in the common mqprio library.
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Simon Horman <simon.horman@corigine.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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There is a lot of code in taprio which is "borrowed" from mqprio.
It makes sense to put a stop to the "borrowing" and start actually
reusing code.
Because taprio and mqprio are built as part of different kernel modules,
code reuse can only take place either by writing it as static inline
(limiting), putting it in sch_generic.o (not generic enough), or
creating a third auto-selectable kernel module which only holds library
code. I opted for the third variant.
In a previous change, mqprio gained support for reverse TC:TXQ mappings,
something which taprio still denies. Make taprio use the same validation
logic so that it supports this configuration as well.
The taprio code didn't enforce TXQ overlaps in txtime-assist mode and
that looks intentional, even if I've no idea why that might be. Preserve
that, but add a comment.
There isn't any dedicated MAINTAINERS entry for mqprio, so nothing to
update there.
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Simon Horman <simon.horman@corigine.com>
Reviewed-by: Gerhard Engleder <gerhard@engleder-embedded.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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To make mqprio more user-friendly, create netlink extended ack messages
which say exactly what is wrong about the queue counts. This uses the
new support for printf-formatted extack messages.
Example:
$ tc qdisc add dev eno0 root handle 1: mqprio num_tc 8 \
map 0 1 2 3 4 5 6 7 queues 3@0 1@1 1@2 1@3 1@4 1@5 1@6 1@7 hw 0
Error: sch_mqprio: TC 0 queues 3@0 overlap with TC 1 queues 1@1.
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Reviewed-by: Simon Horman <simon.horman@corigine.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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mqprio_parse_opt() proudly has a comment:
/* If hardware offload is requested we will leave it to the device
* to either populate the queue counts itself or to validate the
* provided queue counts.
*/
Unfortunately some device drivers did not get this memo, and don't
validate the queue counts, or populate them.
In case drivers don't want to populate the queue counts themselves, just
act upon the requested configuration, it makes sense to introduce a tc
capability, and make mqprio query it, so they don't have to do the
validation themselves.
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Reviewed-by: Simon Horman <simon.horman@corigine.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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By imposing that the last TXQ of TC i is smaller than the first TXQ of
any TC j (j := i+1 .. n), mqprio imposes a strict ordering condition for
the TXQ indices (they must increase as TCs increase).
Claudiu points out that the complexity of the TXQ count validation is
too high for this logic, i.e. instead of iterating over j, it is
sufficient that the TXQ indices of TC i and i + 1 are ordered, and that
will eventually ensure global ordering.
This is true, however it doesn't appear to me that is what the code
really intended to do. Instead, based on the comments, it just wanted to
check for overlaps (and this isn't how one does that).
So the following mqprio configuration, which I had recommended to
Vinicius more than once for igb/igc (to account for the fact that on
this hardware, lower numbered TXQs have higher dequeue priority than
higher ones):
num_tc 4 map 0 1 2 3 queues 1@3 1@2 1@1 1@0
is in fact denied today by mqprio.
The full story is that in fact, it's only denied with "hw 0"; if
hardware offloading is requested, mqprio defers TXQ range overlap
validation to the device driver (a strange decision in itself).
This is most certainly a bug, but it's not one that has any merit for
being fixed on "stable" as far as I can tell. This is because mqprio
always rejected a configuration which was in fact valid, and this has
shaped the way in which mqprio configuration scripts got built for
various hardware (see igb/igc in the link below). Therefore, one could
consider it to be merely an improvement for mqprio to allow reverse
TC:TXQ mappings.
Link: https://patchwork.kernel.org/project/netdevbpf/patch/20230130173145.475943-9-vladimir.oltean@nxp.com/#25188310
Link: https://patchwork.kernel.org/project/netdevbpf/patch/20230128010719.2182346-6-vladimir.oltean@nxp.com/#25186442
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Simon Horman <simon.horman@corigine.com>
Reviewed-by: Gerhard Engleder <gerhard@engleder-embedded.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Since mqprio is a scheduler and not a classifier, move its offload
structure to pkt_sched.h, where struct tc_taprio_qopt_offload also lies.
Also update some header inclusions in drivers that access this
structure, to the best of my abilities.
Cc: Igor Russkikh <irusskikh@marvell.com>
Cc: Yisen Zhuang <yisen.zhuang@huawei.com>
Cc: Salil Mehta <salil.mehta@huawei.com>
Cc: Jesse Brandeburg <jesse.brandeburg@intel.com>
Cc: Tony Nguyen <anthony.l.nguyen@intel.com>
Cc: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Cc: Saeed Mahameed <saeedm@nvidia.com>
Cc: Leon Romanovsky <leon@kernel.org>
Cc: Horatiu Vultur <horatiu.vultur@microchip.com>
Cc: Lars Povlsen <lars.povlsen@microchip.com>
Cc: Steen Hegelund <Steen.Hegelund@microchip.com>
Cc: Daniel Machon <daniel.machon@microchip.com>
Cc: UNGLinuxDriver@microchip.com
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Simon Horman <simon.horman@corigine.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Some more logic will be added to mqprio offloading, so split that code
up from mqprio_init(), which is already large, and create a new
function, mqprio_enable_offload(), similar to taprio_enable_offload().
Also create the opposite function mqprio_disable_offload().
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Reviewed-by: Simon Horman <simon.horman@corigine.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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mqprio_init() is quite large and unwieldy to add more code to.
Split the netlink attribute parsing to a dedicated function.
Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Reviewed-by: Simon Horman <simon.horman@corigine.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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IRQs are currently requested before the netdevice is registered
and a proper name is assigned to the device. Changing interrupt
name to avoid using the format string in the name.
Interrupt name before change: eth%d-ntfy-block.<blk_id>
Interrupt name after change: gve-ntfy-blk<blk_id>@pci:<pci_name>
Signed-off-by: Praveen Kaligineedi <pkaligineedi@google.com>
Reviewed-by: Jeroen de Borst <jeroendb@google.com>
Acked-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/tnguy/next-queue
Tony Nguyen says:
====================
net: implement devlink reload in ice
Michal Swiatkowski says:
This is a part of changes done in patchset [0]. Resource management is
kind of controversial part, so I split it into two patchsets.
It is the first one, covering refactor and implement reload API call.
The refactor will unblock some of the patches needed by SIOV or
subfunction.
Most of this patchset is about implementing driver reload mechanism.
Part of code from probe and rebuild is used to not duplicate code.
To allow this reuse probe and rebuild path are split into smaller
functions.
Patch "ice: split ice_vsi_setup into smaller functions" changes
boolean variable in function call to integer and adds define
for it. Instead of having the function called with true/false now it
can be called with readable defines ICE_VSI_FLAG_INIT or
ICE_VSI_FLAG_NO_INIT. It was suggested by Jacob Keller and probably this
mechanism will be implemented across ice driver in follow up patchset.
Previously the code was reviewed here [0].
[0] https://lore.kernel.org/netdev/Y3ckRWtAtZU1BdXm@unreal/T/#m3bb8feba0a62f9b4cd54cd94917b7e2143fc2ecd
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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First user of skb_poison_list is in kfree_skb_list_reason, to catch bugs
earlier like introduced in commit eedade12f4cb ("net: kfree_skb_list use
kmem_cache_free_bulk"). For completeness mentioned bug have been fixed in
commit f72ff8b81ebc ("net: fix kfree_skb_list use of skb_mark_not_on_list").
In case of a bug like mentioned commit we would have seen OOPS with:
general protection fault, probably for non-canonical address 0xdead000000000870
And content of one the registers e.g. R13: dead000000000800
In this case skb->len is at offset 112 bytes (0x70) why fault happens at
0x800+0x70 = 0x870
Signed-off-by: Jesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Jiawen Wu says:
====================
Wangxun interrupt and RxTx support
Configure interrupt, setup RxTx ring, support to receive and transmit
packets.
change log:
v3:
- Use upper_32_bits() to avoid compile warning.
- Remove useless codes.
v2:
- Andrew Lunn: https://lore.kernel.org/netdev/Y86kDphvyHj21IxK@lunn.ch/
- Add a judgment when allocate dma for descriptor.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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Add enable and disable operation process for ngbe open/close.
Clean Rx and Tx ring interrupts, process packets in the data path.
Signed-off-by: Mengyuan Lou <mengyuanlou@net-swift.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Clean Rx and Tx ring interrupts, process packets in the data path.
Signed-off-by: Jiawen Wu <jiawenwu@trustnetic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Support to transmit packets without hardware features.
Signed-off-by: Mengyuan Lou <mengyuanlou@net-swift.com>
Signed-off-by: Jiawen Wu <jiawenwu@trustnetic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Clean all queues associated with a q_vector, to simple receive packets
without hardware features.
Signed-off-by: Jiawen Wu <jiawenwu@trustnetic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Improve the configuration of Rx and Tx ring, set Rx flags and implement
ndo_set_rx_mode ops.
Signed-off-by: Jiawen Wu <jiawenwu@trustnetic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Setup Rx and Tx descriptors for specefic rings.
Signed-off-by: Jiawen Wu <jiawenwu@trustnetic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Configure hardware for preparing to process packets. Including configure
receive and transmit unit of the MAC layer, and setup the specific rings.
Signed-off-by: Jiawen Wu <jiawenwu@trustnetic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Determine proper interrupt scheme to enable and handle interrupt.
Signed-off-by: Jiawen Wu <jiawenwu@trustnetic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Add request_irq for tx/rx rings and misc other events.
If the application is successful, config vertors for interrupts.
Enable some base interrupts mask in ngbe_irq_enable.
Signed-off-by: Mengyuan Lou <mengyuanlou@net-swift.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Add irq flow functions for ngbe and txgbe.
Alloc pcie msix irqs for drivers, otherwise fall back to msi/legacy.
Signed-off-by: Mengyuan Lou <mengyuanlou@net-swift.com>
Signed-off-by: Jiawen Wu <jiawenwu@trustnetic.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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We use BH context only for synchronization, so we don't care if it's
actually serving softirq or not.
As a side node, in case of threaded NAPI, in_serving_softirq() will
return false because it's in process context with BH off, making
page_pool_recycle_in_cache() unreachable.
Signed-off-by: Qingfang DENG <qingfang.deng@siflower.com.cn>
Tested-by: Felix Fietkau <nbd@nbd.name>
Signed-off-by: David S. Miller <davem@davemloft.net>
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git://git.kernel.org/pub/scm/linux/kernel/git/saeed/linux
Saeed Mahameed says:
====================
mlx5-updates-2023-02-04
This series provides misc updates to mlx5 driver:
1) Trivial LAG code cleanup patches from Roi
2) Rahul improves mlx5's documentation structure
Separates the documentation into multiple pages related to different
components in the device driver. Adds Kconfig parameters, devlink
parameters, and tracepoints that were previously introduced but not added
to the documentation. Introduces a new page on ethtool statistics counters
with information about counters previously implemented in the mlx5_core
driver but not documented in the kernel tree.
3) From Raed, policy/state selector support for IPSec.
4) From Fragos, add support for XDR speed in IPoIB mlx5 netdev
5) Few more misc cleanups and trivial changes
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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To easily audit the code, better to keep the device stop()
sequence to be mirror of the device open() sequence.
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Signed-off-by: Parav Pandit <parav@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Petr Machata says:
====================
bridge: Limit number of MDB entries per port, port-vlan
The MDB maintained by the bridge is limited. When the bridge is configured
for IGMP / MLD snooping, a buggy or malicious client can easily exhaust its
capacity. In SW datapath, the capacity is configurable through the
IFLA_BR_MCAST_HASH_MAX parameter, but ultimately is finite. Obviously a
similar limit exists in the HW datapath for purposes of offloading.
In order to prevent the issue of unilateral exhaustion of MDB resources,
introduce two parameters in each of two contexts:
- Per-port and (when BROPT_MCAST_VLAN_SNOOPING_ENABLED is enabled)
per-port-VLAN number of MDB entries that the port is member in.
- Per-port and (when BROPT_MCAST_VLAN_SNOOPING_ENABLED is enabled)
per-port-VLAN maximum permitted number of MDB entries, or 0 for
no limit.
Per-port number of entries keeps track of the total number of MDB entries
configured on a given port. The per-port-VLAN value then keeps track of the
subset of MDB entries configured specifically for the given VLAN, on that
port. The number is adjusted as port_groups are created and deleted, and
therefore under multicast lock.
A maximum value, if non-zero, then places a limit on the number of entries
that can be configured in a given context. Attempts to add entries above
the maximum are rejected.
Rejection reason of netlink-based requests to add MDB entries is
communicated through extack. This channel is unavailable for rejections
triggered from the control path. To address this lack of visibility, the
patchset adds a tracepoint, bridge:br_mdb_full:
# perf record -e bridge:br_mdb_full &
# [...]
# perf script | cut -d: -f4-
dev v2 af 2 src ::ffff:0.0.0.0 grp ::ffff:239.1.1.112/00:00:00:00:00:00 vid 0
dev v2 af 10 src :: grp ff0e::112/00:00:00:00:00:00 vid 0
dev v2 af 2 src ::ffff:0.0.0.0 grp ::ffff:239.1.1.112/00:00:00:00:00:00 vid 10
dev v2 af 10 src 2001:db8:1::1 grp ff0e::1/00:00:00:00:00:00 vid 10
dev v2 af 2 src ::ffff:192.0.2.1 grp ::ffff:239.1.1.1/00:00:00:00:00:00 vid 10
Another option to consume the tracepoint is e.g. through the bpftrace tool:
# bpftrace -e ' tracepoint:bridge:br_mdb_full /args->af != 0/ {
printf("dev %s src %s grp %s vid %u\n",
str(args->dev), ntop(args->src),
ntop(args->grp), args->vid);
}
tracepoint:bridge:br_mdb_full /args->af == 0/ {
printf("dev %s grp %s vid %u\n",
str(args->dev),
macaddr(args->grpmac), args->vid);
}'
This tracepoint is triggered for mcast_hash_max exhaustions as well.
The following is an example of how the feature is used. A more extensive
example is available in patch #8:
# bridge vlan set dev v1 vid 1 mcast_max_groups 1
# bridge mdb add dev br port v1 grp 230.1.2.3 temp vid 1
# bridge mdb add dev br port v1 grp 230.1.2.4 temp vid 1
Error: bridge: Port-VLAN is already in 1 groups, and mcast_max_groups=1.
The patchset progresses as follows:
- In patch #1, set strict_start_type at two bridge-related policies. The
reason is we are adding a new attribute to one of these, and want the new
attribute to be parsed strictly. The other was adjusted for completeness'
sake.
- In patches #2 to #5, br_mdb and br_multicast code is adjusted to make the
following additions smoother.
- In patch #6, add the tracepoint.
- In patch #7, the code to maintain number of MDB entries is added as
struct net_bridge_mcast_port::mdb_n_entries. The maximum is added, too,
as struct net_bridge_mcast_port::mdb_max_entries, however at this point
there is no way to set the value yet, and since 0 is treated as "no
limit", the functionality doesn't change at this point. Note however,
that mcast_hash_max violations already do trigger at this point.
- In patch #8, netlink plumbing is added: reading of number of entries, and
reading and writing of maximum.
The per-port values are passed through RTM_NEWLINK / RTM_GETLINK messages
in IFLA_BRPORT_MCAST_N_GROUPS and _MAX_GROUPS, inside IFLA_PROTINFO nest.
The per-port-vlan values are passed through RTM_GETVLAN / RTM_NEWVLAN
messages in BRIDGE_VLANDB_ENTRY_MCAST_N_GROUPS, _MAX_GROUPS, inside
BRIDGE_VLANDB_ENTRY.
The following patches deal with the selftest:
- Patches #9 and #10 clean up and move around some selftest code.
- Patches #11 to #14 add helpers and generalize the existing IGMP / MLD
support to allow generating packets with configurable group addresses and
varying source lists for (S,G) memberships.
- Patch #15 adds code to generate IGMP leave and MLD done packets.
- Patch #16 finally adds the selftest itself.
v3:
- Patch #7:
- Access mdb_max_/_n_entries through READ_/WRITE_ONCE
- Move extack setting to br_multicast_port_ngroups_inc_one().
Since we use NL_SET_ERR_MSG_FMT_MOD, the correct context
(port / port-vlan) can be passed through an argument.
This also removes the need for more READ/WRITE_ONCE's
at the extack-setting site.
- Patch #8:
- Move the br_multicast_port_ctx_vlan_disabled() check
out to the _vlan_ helpers callers. Thus these helpers
cannot fail, which makes them very similar to the
_port_ helpers. Have them take the MC context directly
and unify them.
v2:
- Cover letter:
- Add an example of a bpftrace-based probe script
- Patch #6:
- Report IPv4 as an IPv6-mapped address through the IPv6 buffer
as well, to save ring buffer space.
- Patch #7:
- In br_multicast_port_ngroups_inc_one(), bounce
if n>=max, not if n==max
- Adjust extack messages to mention ngroups, now
that the bounces appear when n>=max, not n==max
- In __br_multicast_enable_port_ctx(), do not reset
max to 0. Also do not count number of entries by
going through _inc, as that would end up incorrectly
bouncing the entries.
- Patch #8:
- Drop locks around accesses in
br_multicast_{port,vlan}_ngroups_{get,set_max}(),
- Drop bounces due to max<n in
br_multicast_{port,vlan}_ngroups_set_max().
- Patch #12:
- In the comment at payload_template_calc_checksum(),
s/%#02x/%02x/, that's the mausezahn payload format.
- Patch #16:
- Adjust the tests that check setting max below n and
reset of max on VLAN snooping enablement
- Make test naming uniform
- Enable testing of control path (IGMP/MLD) in
mcast_vlan_snooping bridge
- Reorganize the code so that test instances (per bridge
type and configuration type) always come right after
the test, in order of {d,q,qvs}{4,6}{cfg,ctl}.
Then groups of selftests are at the end of the file.
Similarly adjust invocation order of the tests.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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Add a suite covering mcast_n_groups and mcast_max_groups bridge features.
Signed-off-by: Petr Machata <petrm@nvidia.com>
Acked-by: Nikolay Aleksandrov <razor@blackwall.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The testsuite that checks for mcast_max_groups functionality will need to
wipe the added groups as well. Add helpers to build an IGMP or MLD packets
announcing that host is leaving a given group.
Signed-off-by: Petr Machata <petrm@nvidia.com>
Acked-by: Nikolay Aleksandrov <razor@blackwall.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The testsuite that checks for mcast_max_groups functionality will need
to generate IGMP and MLD packets with configurable number of (S,G)
addresses. To that end, further extend igmpv3_is_in_get() and
mldv2_is_in_get() to allow a list of IP addresses instead of one
address.
Signed-off-by: Petr Machata <petrm@nvidia.com>
Acked-by: Nikolay Aleksandrov <razor@blackwall.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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In order to generate IGMPv3 and MLDv2 packets on the fly, the
functions that generate these packets need to be able to generate
packets for different groups and different sources. Generating MLDv2
packets further needs the source address of the packet for purposes of
checksum calculation. Add the necessary parameters, and generate the
payload accordingly by dispatching to helpers added in the previous
patches.
Adjust the sole client, bridge_mdb.sh, as well.
Signed-off-by: Petr Machata <petrm@nvidia.com>
Acked-by: Nikolay Aleksandrov <razor@blackwall.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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In order to generate IGMPv3 and MLDv2 packets on the fly, we will need
helpers to calculate the packet checksum.
The approach presented in this patch revolves around payload templates
for mausezahn. These are mausezahn-like payload strings (01:23:45:...)
with possibly one 2-byte sequence replaced with the word PAYLOAD. The
main function is payload_template_calc_checksum(), which calculates
RFC 1071 checksum of the message. There are further helpers to then
convert the checksum to the payload format, and to expand it.
For IPv6, MLDv2 message checksum is computed using a pseudoheader that
differs from the header used in the payload itself. The fact that the
two messages are different means that the checksum needs to be
returned as a separate quantity, instead of being expanded in-place in
the payload itself. Furthermore, the pseudoheader includes a length of
the message. Much like the checksum, this needs to be expanded in
mausezahn format. And likewise for number of addresses for (S,G)
entries. Thus we have several places where a computed quantity needs
to be presented in the payload format. Add a helper u16_to_bytes(),
which will be used in all these cases.
Signed-off-by: Petr Machata <petrm@nvidia.com>
Acked-by: Nikolay Aleksandrov <razor@blackwall.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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In order to generate IGMPv3 and MLDv2 packets on the fly, we will need
helpers to expand IPv4 and IPv6 addresses given as parameters in
mausezahn payload notation. Add helpers that do it.
Signed-off-by: Petr Machata <petrm@nvidia.com>
Acked-by: Nikolay Aleksandrov <razor@blackwall.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Add the letter missing from the word "INCLUDE".
Signed-off-by: Petr Machata <petrm@nvidia.com>
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
Acked-by: Nikolay Aleksandrov <razor@blackwall.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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These functions will be helpful for other testsuites as well. Extract them
to a common place.
Signed-off-by: Petr Machata <petrm@nvidia.com>
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
Acked-by: Nikolay Aleksandrov <razor@blackwall.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The previous patch added accounting for number of MDB entries per port and
per port-VLAN, and the logic to verify that these values stay within
configured bounds. However it didn't provide means to actually configure
those bounds or read the occupancy. This patch does that.
Two new netlink attributes are added for the MDB occupancy:
IFLA_BRPORT_MCAST_N_GROUPS for the per-port occupancy and
BRIDGE_VLANDB_ENTRY_MCAST_N_GROUPS for the per-port-VLAN occupancy.
And another two for the maximum number of MDB entries:
IFLA_BRPORT_MCAST_MAX_GROUPS for the per-port maximum, and
BRIDGE_VLANDB_ENTRY_MCAST_MAX_GROUPS for the per-port-VLAN one.
Note that the two new IFLA_BRPORT_ attributes prompt bumping of
RTNL_SLAVE_MAX_TYPE to size the slave attribute tables large enough.
The new attributes are used like this:
# ip link add name br up type bridge vlan_filtering 1 mcast_snooping 1 \
mcast_vlan_snooping 1 mcast_querier 1
# ip link set dev v1 master br
# bridge vlan add dev v1 vid 2
# bridge vlan set dev v1 vid 1 mcast_max_groups 1
# bridge mdb add dev br port v1 grp 230.1.2.3 temp vid 1
# bridge mdb add dev br port v1 grp 230.1.2.4 temp vid 1
Error: bridge: Port-VLAN is already in 1 groups, and mcast_max_groups=1.
# bridge link set dev v1 mcast_max_groups 1
# bridge mdb add dev br port v1 grp 230.1.2.3 temp vid 2
Error: bridge: Port is already in 1 groups, and mcast_max_groups=1.
# bridge -d link show
5: v1@v2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 master br [...]
[...] mcast_n_groups 1 mcast_max_groups 1
# bridge -d vlan show
port vlan-id
br 1 PVID Egress Untagged
state forwarding mcast_router 1
v1 1 PVID Egress Untagged
[...] mcast_n_groups 1 mcast_max_groups 1
2
[...] mcast_n_groups 0 mcast_max_groups 0
Signed-off-by: Petr Machata <petrm@nvidia.com>
Acked-by: Nikolay Aleksandrov <razor@blackwall.org>
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The MDB maintained by the bridge is limited. When the bridge is configured
for IGMP / MLD snooping, a buggy or malicious client can easily exhaust its
capacity. In SW datapath, the capacity is configurable through the
IFLA_BR_MCAST_HASH_MAX parameter, but ultimately is finite. Obviously a
similar limit exists in the HW datapath for purposes of offloading.
In order to prevent the issue of unilateral exhaustion of MDB resources,
introduce two parameters in each of two contexts:
- Per-port and per-port-VLAN number of MDB entries that the port
is member in.
- Per-port and (when BROPT_MCAST_VLAN_SNOOPING_ENABLED is enabled)
per-port-VLAN maximum permitted number of MDB entries, or 0 for
no limit.
The per-port multicast context is used for tracking of MDB entries for the
port as a whole. This is available for all bridges.
The per-port-VLAN multicast context is then only available on
VLAN-filtering bridges on VLANs that have multicast snooping on.
With these changes in place, it will be possible to configure MDB limit for
bridge as a whole, or any one port as a whole, or any single port-VLAN.
Note that unlike the global limit, exhaustion of the per-port and
per-port-VLAN maximums does not cause disablement of multicast snooping.
It is also permitted to configure the local limit larger than hash_max,
even though that is not useful.
In this patch, introduce only the accounting for number of entries, and the
max field itself, but not the means to toggle the max. The next patch
introduces the netlink APIs to toggle and read the values.
Signed-off-by: Petr Machata <petrm@nvidia.com>
Acked-by: Nikolay Aleksandrov <razor@blackwall.org>
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The following patch will add two more maximum MDB allowances to the global
one, mcast_hash_max, that exists today. In all these cases, attempts to add
MDB entries above the configured maximums through netlink, fail noisily and
obviously. Such visibility is missing when adding entries through the
control plane traffic, by IGMP or MLD packets.
To improve visibility in those cases, add a trace point that reports the
violation, including the relevant netdevice (be it a slave or the bridge
itself), and the MDB entry parameters:
# perf record -e bridge:br_mdb_full &
# [...]
# perf script | cut -d: -f4-
dev v2 af 2 src ::ffff:0.0.0.0 grp ::ffff:239.1.1.112/00:00:00:00:00:00 vid 0
dev v2 af 10 src :: grp ff0e::112/00:00:00:00:00:00 vid 0
dev v2 af 2 src ::ffff:0.0.0.0 grp ::ffff:239.1.1.112/00:00:00:00:00:00 vid 10
dev v2 af 10 src 2001:db8:1::1 grp ff0e::1/00:00:00:00:00:00 vid 10
dev v2 af 2 src ::ffff:192.0.2.1 grp ::ffff:239.1.1.1/00:00:00:00:00:00 vid 10
CC: Steven Rostedt <rostedt@goodmis.org>
CC: linux-trace-kernel@vger.kernel.org
Signed-off-by: Petr Machata <petrm@nvidia.com>
Reviewed-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Acked-by: Nikolay Aleksandrov <razor@blackwall.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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This function is getting more to clean up in the following patches.
Structuring the cleanups in one labeled block will allow reusing the same
cleanup from several places.
Signed-off-by: Petr Machata <petrm@nvidia.com>
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
Acked-by: Nikolay Aleksandrov <razor@blackwall.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Since cleaning up the effects of br_multicast_new_port_group() just
consists of delisting and freeing the memory, the function
br_mdb_add_group_star_g() inlines the corresponding code. In the following
patches, number of per-port and per-port-VLAN MDB entries is going to be
maintained, and that counter will have to be updated. Because that logic
is going to be hidden in the br_multicast module, introduce a new hook
intended to again remove a newly-created group.
Signed-off-by: Petr Machata <petrm@nvidia.com>
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
Acked-by: Nikolay Aleksandrov <razor@blackwall.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Now that br_multicast_new_port_group() takes an extack argument, move
setting the extack there. The downside is that the error messages end
up being less specific (the function cannot distinguish between (S,G)
and (*,G) groups). However, the alternative is to check in the caller
whether the callee set the extack, and if it didn't, set it. But that
is only done when the callee is not exactly known. (E.g. in case of a
notifier invocation.)
Signed-off-by: Petr Machata <petrm@nvidia.com>
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
Acked-by: Nikolay Aleksandrov <razor@blackwall.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Make it possible to set an extack in br_multicast_new_port_group().
Eventually, this function will check for per-port and per-port-vlan
MDB maximums, and will use the extack to communicate the reason for
the bounce.
Signed-off-by: Petr Machata <petrm@nvidia.com>
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
Acked-by: Nikolay Aleksandrov <razor@blackwall.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Make any attributes newly-added to br_port_policy or vlan_tunnel_policy
parsed strictly, to prevent userspace from passing garbage. Note that this
patchset only touches the former policy. The latter was adjusted for
completeness' sake. There do not appear to be other _deprecated calls
with non-NULL policies.
Suggested-by: Ido Schimmel <idosch@nvidia.com>
Signed-off-by: Petr Machata <petrm@nvidia.com>
Reviewed-by: Ido Schimmel <idosch@nvidia.com>
Acked-by: Nikolay Aleksandrov <razor@blackwall.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Daniel Machon says:
====================
net: Add support for PSFP in Sparx5
================================================================================
Add support for Per-Stream Filtering and Policing (802.1Q-2018, 8.6.5.1).
================================================================================
The VCAP CLM (VCAP IS0 ingress classifier) classifies streams,
identified by ISDX (Ingress Service Index, frame metadata), and maps
ISDX to streams.
Flow meters are also classified by ISDX, and implemented using service
policers (Service Dual Leacky Buckets, SDLB). Leacky buckets are linked
together in a leak chain of a leak group. Leak groups a preconfigured to serve
buckets within a certain rate interval.
Stream gates are time-based policers used by PSFP. Frames are dropped
based on the gate state (OPEN/ CLOSE), whose state will be altered based
on the Gate Control List (GCL) and current PTP time. Apart from
time-based policing, stream gates can alter egress queue selection for
the frames that pass through the Gate. This is done through Internal
Priority Selector (IPS). Stream gates are mapped from stream filters.
Support for tc actions gate and police, have been added to the VCAP IS0 set of
supported actions.
Examples:
// tc filter with gate action
$ tc filter add dev eth1 ingress chain 1100000 prio 1 handle 1001 protocol \
802.1q flower skip_sw vlan_id 100 action gate base-time 0 sched-entry open \
700000 7 8m sched-entry close 300000 action goto chain 1200000
// tc filter with police action
$ tc filter add dev eth1 ingress chain 1100000 prio 1 handle 1002 protocol \
802.1q flower skip_sw vlan_id 100 action police rate 1gbit burst 8096 \
conform-exceed drop action goto chain 1200000
================================================================================
Patches
================================================================================
Patch #1: Adds new register needed for PSFP.
Patch #2: Adds resource pools to control PSFP needed chip resources.
Patch #3: Adds support for SDLB's needed for flow-meters.
Patch #4: Adds support for service policers.
Patch #5: Adds support for PSFP flow-meters, using service policers.
Patch #6: Adds a new function to calculate basetime, required by flow-meters.
Patch #7: Adds support for PSFP stream gates.
Patch #8: Adds support for PSFP stream filters.
Patch #9: Adds a function to initialize flow-meters, stream gates and stream
filters.
Patch #10: Adds the required flower code to configure PSFP using the tc command.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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Add support for tc actions gate and police, in order to implement
support for configuring PSFP through tc.
Signed-off-by: Daniel Machon <daniel.machon@microchip.com>
Reviewed-by: Simon Horman <simon.horman@corigine.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Initialize the SDLB's, stream gates and stream filters.
Signed-off-by: Daniel Machon <daniel.machon@microchip.com>
Reviewed-by: Simon Horman <simon.horman@corigine.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Add support for configuring PSFP stream filters (IEEE 802.1Q-2018,
8.6.5.1.1).
The VCAP CLM (VCAP IS0 ingress classifier) classifies streams,
identified by ISDX (Ingress Service Index, frame metadata), and maps
ISDX to streams.
Signed-off-by: Daniel Machon <daniel.machon@microchip.com>
Reviewed-by: Simon Horman <simon.horman@corigine.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Add support for configuring PSFP stream gates (IEEE 802.1Q-2018,
8.6.5.1.2).
Stream gates are time-based policers used by PSFP. Frames are dropped
based on the gate state (OPEN/ CLOSE), whose state will be altered based
on the Gate Control List (GCL) and current PTP time. Apart from
time-based policing, stream gates can alter egress queue selection for
the frames that pass through the Gate. This is done through Internal
Priority Selector (IPS). Stream gates are mapped from stream filters.
Signed-off-by: Daniel Machon <daniel.machon@microchip.com>
Reviewed-by: Simon Horman <simon.horman@corigine.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Add a new function for calculating PTP basetime, required by the stream
gate scheduler to calculate gate state (open / close).
Signed-off-by: Daniel Machon <daniel.machon@microchip.com>
Reviewed-by: Simon Horman <simon.horman@corigine.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Add support for configuring PSFP flow-meters (IEEE 802.1Q-2018,
8.6.5.1.3).
The VCAP CLM (VCAP IS0 ingress classifier) classifies streams,
identified by ISDX (Ingress Service Index, frame metadata), and maps
ISDX to flow-meters. SDLB's provide the flow-meter parameters.
Signed-off-by: Daniel Machon <daniel.machon@microchip.com>
Reviewed-by: Simon Horman <simon.horman@corigine.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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