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The UDP reuseport conflict was a little bit tricky.
The net-next code, via bpf-next, extracted the reuseport handling
into a helper so that the BPF sk lookup code could invoke it.
At the same time, the logic for reuseport handling of unconnected
sockets changed via commit efc6b6f6c3113e8b203b9debfb72d81e0f3dcace
which changed the logic to carry on the reuseport result into the
rest of the lookup loop if we do not return immediately.
This requires moving the reuseport_has_conns() logic into the callers.
While we are here, get rid of inline directives as they do not belong
in foo.c files.
The other changes were cases of more straightforward overlapping
modifications.
Signed-off-by: David S. Miller <davem@davemloft.net>
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Pull networking fixes from David Miller:
1) Fix RCU locaking in iwlwifi, from Johannes Berg.
2) mt76 can access uninitialized NAPI struct, from Felix Fietkau.
3) Fix race in updating pause settings in bnxt_en, from Vasundhara
Volam.
4) Propagate error return properly during unbind failures in ax88172a,
from George Kennedy.
5) Fix memleak in adf7242_probe, from Liu Jian.
6) smc_drv_probe() can leak, from Wang Hai.
7) Don't muck with the carrier state if register_netdevice() fails in
the bonding driver, from Taehee Yoo.
8) Fix memleak in dpaa_eth_probe, from Liu Jian.
9) Need to check skb_put_padto() return value in hsr_fill_tag(), from
Murali Karicheri.
10) Don't lose ionic RSS hash settings across FW update, from Shannon
Nelson.
11) Fix clobbered SKB control block in act_ct, from Wen Xu.
12) Missing newlink in "tx_timeout" sysfs output, from Xiongfeng Wang.
13) IS_UDPLITE cleanup a long time ago, incorrectly handled
transformations involving UDPLITE_RECV_CC. From Miaohe Lin.
14) Unbalanced locking in netdevsim, from Taehee Yoo.
15) Suppress false-positive error messages in qed driver, from Alexander
Lobakin.
16) Out of bounds read in ax25_connect and ax25_sendmsg, from Peilin Ye.
17) Missing SKB release in cxgb4's uld_send(), from Navid Emamdoost.
18) Uninitialized value in geneve_changelink(), from Cong Wang.
19) Fix deadlock in xen-netfront, from Andera Righi.
19) flush_backlog() frees skbs with IRQs disabled, so should use
dev_kfree_skb_irq() instead of kfree_skb(). From Subash Abhinov
Kasiviswanathan.
* git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (111 commits)
drivers/net/wan: lapb: Corrected the usage of skb_cow
dev: Defer free of skbs in flush_backlog
qrtr: orphan socket in qrtr_release()
xen-netfront: fix potential deadlock in xennet_remove()
flow_offload: Move rhashtable inclusion to the source file
geneve: fix an uninitialized value in geneve_changelink()
bonding: check return value of register_netdevice() in bond_newlink()
tcp: allow at most one TLP probe per flight
AX.25: Prevent integer overflows in connect and sendmsg
cxgb4: add missing release on skb in uld_send()
net: atlantic: fix PTP on AQC10X
AX.25: Prevent out-of-bounds read in ax25_sendmsg()
sctp: shrink stream outq when fails to do addstream reconf
sctp: shrink stream outq only when new outcnt < old outcnt
AX.25: Fix out-of-bounds read in ax25_connect()
enetc: Remove the mdio bus on PF probe bailout
net: ethernet: ti: add NETIF_F_HW_TC hw feature flag for taprio offload
net: ethernet: ave: Fix error returns in ave_init
drivers/net/wan/x25_asy: Fix to make it work
ipvs: fix the connection sync failed in some cases
...
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IRQs are disabled when freeing skbs in input queue.
Use the IRQ safe variant to free skbs here.
Fixes: 145dd5f9c88f ("net: flush the softnet backlog in process context")
Signed-off-by: Subash Abhinov Kasiviswanathan <subashab@codeaurora.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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We have to detach sock from socket in qrtr_release(),
otherwise skb->sk may still reference to this socket
when the skb is released in tun->queue, particularly
sk->sk_wq still points to &sock->wq, which leads to
a UAF.
Reported-and-tested-by: syzbot+6720d64f31c081c2f708@syzkaller.appspotmail.com
Fixes: 28fb4e59a47d ("net: qrtr: Expose tunneling endpoint to user space")
Cc: Bjorn Andersson <bjorn.andersson@linaro.org>
Cc: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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l2tp_session_free called BUG_ON if the tunnel magic feather value wasn't
correct. The intent of this was to catch lifetime bugs; for example
early tunnel free due to incorrect use of reference counts.
Since the tunnel magic feather being wrong indicates either early free
or structure corruption, we can avoid doing more damage by simply
leaving the tunnel structure alone. If the tunnel refcount isn't
dropped when it should be, the tunnel instance will remain in the
kernel, resulting in the tunnel structure and socket leaking.
Signed-off-by: Tom Parkin <tparkin@katalix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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l2tp_session_free is only called by l2tp_session_dec_refcount when the
reference count reaches zero, so it's of limited value to validate the
reference count value in l2tp_session_free itself.
Signed-off-by: Tom Parkin <tparkin@katalix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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l2tp_session_queue_purge is used during session shutdown to drop any
skbs queued for reordering purposes according to L2TP dataplane rules.
The BUG_ON in this function checks the session magic feather in an
attempt to catch lifetime bugs.
Rather than crashing the kernel with a BUG_ON, we can simply WARN_ON and
refuse to do anything more -- in the worst case this could result in a
leak. However this is highly unlikely given that the session purge only
occurs from codepaths which have obtained the session by means of a lookup
via. the parent tunnel and which check the session "dead" flag to
protect against shutdown races.
While we're here, have l2tp_session_queue_purge return void rather than
an integer, since neither of the callsites checked the return value.
Signed-off-by: Tom Parkin <tparkin@katalix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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checkpatch advises that WARN_ON and recovery code are preferred over
BUG_ON which crashes the kernel.
l2tp_ppp has a BUG_ON check of struct seq_file's private pointer in
pppol2tp_seq_start prior to accessing data through that pointer.
Rather than crashing, we can simply bail out early and return NULL in
order to terminate the seq file processing in much the same way as we do
when reaching the end of tunnel/session instances to render.
Retain a WARN_ON to help trace possible bugs in this area.
Signed-off-by: Tom Parkin <tparkin@katalix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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checkpatch advises that WARN_ON and recovery code are preferred over
BUG_ON which crashes the kernel.
l2tp_ppp.c's BUG_ON checks of the l2tp session structure's "magic" field
occur in code paths where it's reasonably easy to recover:
* In the case of pppol2tp_sock_to_session, we can return NULL and the
caller will bail out appropriately. There is no change required to
any of the callsites of this function since they already handle
pppol2tp_sock_to_session returning NULL.
* In the case of pppol2tp_session_destruct we can just avoid
decrementing the reference count on the suspect session structure.
In the worst case scenario this results in a memory leak, which is
preferable to a crash.
Convert these uses of BUG_ON to WARN_ON accordingly.
Signed-off-by: Tom Parkin <tparkin@katalix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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l2tp_tunnel_closeall is only called from l2tp_core.c, and it's easy
to statically analyse the code path calling it to validate that it
should never be passed a NULL tunnel pointer.
Having a BUG_ON checking the tunnel pointer triggers a checkpatch
warning. Since the BUG_ON is of no value, remove it to avoid the
warning.
Signed-off-by: Tom Parkin <tparkin@katalix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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l2tp_session_queue_purge is only called from l2tp_core.c, and it's easy
to statically analyse the code paths calling it to validate that it
should never be passed a NULL session pointer.
Having a BUG_ON checking the session pointer triggers a checkpatch
warning. Since the BUG_ON is of no value, remove it to avoid the
warning.
Signed-off-by: Tom Parkin <tparkin@katalix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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l2tp_dfs_seq_start had a BUG_ON to catch a possible programming error in
l2tp_dfs_seq_open.
Since we can easily bail out of l2tp_dfs_seq_start, prefer to do that
and flag the error with a WARN_ON rather than crashing the kernel.
Signed-off-by: Tom Parkin <tparkin@katalix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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checkpatch warns about multiple assignments.
Update l2tp accordingly.
Signed-off-by: Tom Parkin <tparkin@katalix.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Extend the rfc 4884 read interface introduced for ipv4 in
commit eba75c587e81 ("icmp: support rfc 4884") to ipv6.
Add socket option SOL_IPV6/IPV6_RECVERR_RFC4884.
Changes v1->v2:
- make ipv6_icmp_error_rfc4884 static (file scope)
Signed-off-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The RFC 4884 spec is largely the same between IPv4 and IPv6.
Factor out the IPv4 specific parts in preparation for IPv6 support:
- icmp types supported
- icmp header size, and thus offset to original datagram start
- datagram length field offset in icmp(6)hdr.
- datagram length field word size: 4B for IPv4, 8B for IPv6.
Signed-off-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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1) Only accept packets with original datagram len field >= header len.
The extension header must start after the original datagram headers.
The embedded datagram len field is compared against the 128B minimum
stipulated by RFC 4884. It is unlikely that headers extend beyond
this. But as we know the exact header length, check explicitly.
2) Remove the check that datagram length must be <= 576B.
This is a send constraint. There is no value in testing this on rx.
Within private networks it may be known safe to send larger packets.
Process these packets.
This test was also too lax. It compared original datagram length
rather than entire icmp packet length. The stand-alone fix would be:
- if (hlen + skb->len > 576)
+ if (-skb_network_offset(skb) + skb->len > 576)
Fixes: eba75c587e81 ("icmp: support rfc 4884")
Signed-off-by: Willem de Bruijn <willemb@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The variable status is being initialized with a value that is never read
and it is being updated later with a new value. The initialization is
redundant and can be removed. Also put the variable declarations into
reverse christmas tree order.
Addresses-Coverity: ("Unused value")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The previous patch introduced a deadlock, this patch fixes it by making
sure the work is canceled without holding the global ovs lock. This is
done by moving the reorder processing one layer up to the netns level.
Fixes: eac87c413bf9 ("net: openvswitch: reorder masks array based on usage")
Reported-by: syzbot+2c4ff3614695f75ce26c@syzkaller.appspotmail.com
Reported-by: syzbot+bad6507e5db05017b008@syzkaller.appspotmail.com
Reviewed-by: Paolo <pabeni@redhat.com>
Signed-off-by: Eelco Chaudron <echaudro@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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This sockopt accepts two kinds of parameters, using struct
sctp_sack_info and struct sctp_assoc_value. The mentioned commit didn't
notice an implicit cast from the smaller (latter) struct to the bigger
one (former) when copying the data from the user space, which now leads
to an attempt to write beyond the buffer (because it assumes the storing
buffer is bigger than the parameter itself).
Fix it by allocating a sctp_sack_info on stack and filling it out based
on the small struct for the compat case.
Changelog stole from an earlier patch from Marcelo Ricardo Leitner.
Fixes: ebb25defdc17 ("sctp: pass a kernel pointer to sctp_setsockopt_delayed_ack")
Reported-by: syzbot+0e4699d000d8b874d8dc@syzkaller.appspotmail.com
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Marcelo Ricardo Leitner <marcelo.leitner@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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For architectures like x86 and arm64 we don't need the separate bit to
indicate that a pointer is a kernel pointer as the address spaces are
unified. That way the sockptr_t can be reduced to a union of two
pointers, which leads to nicer calling conventions.
The only caveat is that we need to check that users don't pass in kernel
address and thus gain access to kernel memory. Thus the USER_SOCKPTR
helper is replaced with a init_user_sockptr function that does this check
and returns an error if it fails.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Rework the remaining setsockopt code to pass a sockptr_t instead of a
plain user pointer. This removes the last remaining set_fs(KERNEL_DS)
outside of architecture specific code.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Stefan Schmidt <stefan@datenfreihafen.org> [ieee802154]
Acked-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Pass a sockptr_t to prepare for set_fs-less handling of the kernel
pointer from bpf-cgroup.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Pass a sockptr_t to prepare for set_fs-less handling of the kernel
pointer from bpf-cgroup.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Pass a sockptr_t to prepare for set_fs-less handling of the kernel
pointer from bpf-cgroup.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Pass a sockptr_t to prepare for set_fs-less handling of the kernel
pointer from bpf-cgroup.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Factour out a helper to set the IPv6 option headers from
do_ipv6_setsockopt.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Pass a sockptr_t to prepare for set_fs-less handling of the kernel
pointer from bpf-cgroup.
Note that the get case is pretty weird in that it actually copies data
back to userspace from setsockopt.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Split ipv6_flowlabel_opt into a subfunction for each action and a small
wrapper.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Pass a sockptr_t to prepare for set_fs-less handling of the kernel
pointer from bpf-cgroup.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Pass a sockptr_t to prepare for set_fs-less handling of the kernel
pointer from bpf-cgroup.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Use the sockptr_t type to merge the versions.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Pass a sockptr_t to prepare for set_fs-less handling of the kernel
pointer from bpf-cgroup.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
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This is mostly to prepare for cleaning up the callers, as bpfilter by
design can't handle kernel pointers.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Pass a sockptr_t to prepare for set_fs-less handling of the kernel
pointer from bpf-cgroup.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Pass a sockptr_t to prepare for set_fs-less handling of the kernel
pointer from bpf-cgroup.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Pass a sockptr_t to prepare for set_fs-less handling of the kernel
pointer from bpf-cgroup.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Pass a sockptr_t to prepare for set_fs-less handling of the kernel
pointer from bpf-cgroup.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Pass a sockptr_t to prepare for set_fs-less handling of the kernel
pointer from bpf-cgroup.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Pass a sockptr_t to prepare for set_fs-less handling of the kernel
pointer from bpf-cgroup.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Pass a sockptr_t to prepare for set_fs-less handling of the kernel
pointer from bpf-cgroup.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The bpfilter user mode helper processes the optval address using
process_vm_readv. Don't send it kernel addresses fed under
set_fs(KERNEL_DS) as that won't work.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Split __bpfilter_process_sockopt into a low-level send request routine and
the actual setsockopt hook to split the init time ping from the actual
setsockopt processing.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The __user doesn't make sense when casting to an integer type, just
switch to a uintptr_t cast which also removes the need for the __force.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Luc Van Oostenryck <luc.vanoostenryck@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Adding new cls flower keys for hash value and hash
mask and dissect the hash info from the skb into
the flow key towards flow classication.
Signed-off-by: Ariel Levkovich <lariel@mellanox.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Retreive a hash value from the SKB and store it
in the dissector key for future matching.
Signed-off-by: Ariel Levkovich <lariel@mellanox.com>
Reviewed-by: Jiri Pirko <jiri@mellanox.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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I noticed that touching linux/rhashtable.h causes lib/vsprintf.c to
be rebuilt. This dependency came through a bogus inclusion in the
file net/flow_offload.h. This patch moves it to the right place.
This patch also removes a lingering rhashtable inclusion in cls_api
created by the same commit.
Fixes: 4e481908c51b ("flow_offload: move tc indirect block to...")
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Pablo Neira Ayuso says:
====================
Netfilter/IPVS fixes for net
The following patchset contains Netfilter/IPVS fixes for net:
1) Fix NAT hook deletion when table is dormant, from Florian Westphal.
2) Fix IPVS sync stalls, from guodeqing.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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The purpose of this override is to give the user an indication of what
the number of the CPU port is (in DSA, the CPU port is a hardware
implementation detail and not a network interface capable of traffic).
However, it has always failed (by design) at providing this information
to the user in a reliable fashion.
Prior to commit 3369afba1e46 ("net: Call into DSA netdevice_ops
wrappers"), the behavior was to only override this callback if it was
not provided by the DSA master.
That was its first failure: if the DSA master itself was a DSA port or a
switchdev, then the user would not see the number of the CPU port in
/sys/class/net/eth0/phys_port_name, but the number of the DSA master
port within its respective physical switch.
But that was actually ok in a way. The commit mentioned above changed
that behavior, and now overrides the master's ndo_get_phys_port_name
unconditionally. That comes with problems of its own, which are worse in
a way.
The idea is that it's typical for switchdev users to have udev rules for
consistent interface naming. These are based, among other things, on
the phys_port_name attribute. If we let the DSA switch at the bottom
to start randomly overriding ndo_get_phys_port_name with its own CPU
port, we basically lose any predictability in interface naming, or even
uniqueness, for that matter.
So, there are reasons to let DSA override the master's callback (to
provide a consistent interface, a number which has a clear meaning and
must not be interpreted according to context), and there are reasons to
not let DSA override it (it breaks udev matching for the DSA master).
But, there is an alternative method for users to retrieve the number of
the CPU port of each DSA switch in the system:
$ devlink port
pci/0000:00:00.5/0: type eth netdev swp0 flavour physical port 0
pci/0000:00:00.5/2: type eth netdev swp2 flavour physical port 2
pci/0000:00:00.5/4: type notset flavour cpu port 4
spi/spi2.0/0: type eth netdev sw0p0 flavour physical port 0
spi/spi2.0/1: type eth netdev sw0p1 flavour physical port 1
spi/spi2.0/2: type eth netdev sw0p2 flavour physical port 2
spi/spi2.0/4: type notset flavour cpu port 4
spi/spi2.1/0: type eth netdev sw1p0 flavour physical port 0
spi/spi2.1/1: type eth netdev sw1p1 flavour physical port 1
spi/spi2.1/2: type eth netdev sw1p2 flavour physical port 2
spi/spi2.1/3: type eth netdev sw1p3 flavour physical port 3
spi/spi2.1/4: type notset flavour cpu port 4
So remove this duplicated, unreliable and troublesome method. From this
patch on, the phys_port_name attribute of the DSA master will only
contain information about itself (if at all). If the users need reliable
information about the CPU port they're probably using devlink anyway.
Signed-off-by: Vladimir Oltean <olteanv@gmail.com>
Acked-by: florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Previously TLP may send multiple probes of new data in one
flight. This happens when the sender is cwnd limited. After the
initial TLP containing new data is sent, the sender receives another
ACK that acks partial inflight. It may re-arm another TLP timer
to send more, if no further ACK returns before the next TLP timeout
(PTO) expires. The sender may send in theory a large amount of TLP
until send queue is depleted. This only happens if the sender sees
such irregular uncommon ACK pattern. But it is generally undesirable
behavior during congestion especially.
The original TLP design restrict only one TLP probe per inflight as
published in "Reducing Web Latency: the Virtue of Gentle Aggression",
SIGCOMM 2013. This patch changes TLP to send at most one probe
per inflight.
Note that if the sender is app-limited, TLP retransmits old data
and did not have this issue.
Signed-off-by: Yuchung Cheng <ycheng@google.com>
Signed-off-by: Neal Cardwell <ncardwell@google.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
|
