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This patch adds the following features:
- Support for XDP_TX and XDP_DROP action when using xdp_buff
with frags
- Support for freeing all frags attached to an xdp_buff
- Cleanup of TX ring buffers after transmits complete
- Slight change in definition of bnxt_sw_tx_bd since nr_frags
and RX producer may both need to be used
- Clear out skb_shared_info at the end of the buffer
v2: Fix uninitialized variable warning in bnxt_xdp_buff_frags_free().
Signed-off-by: Andy Gospodarek <gospo@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Since we have an xdp_buff with frags there needs to be a way to
convert that into a valid sk_buff in the event that XDP_PASS is
the resulting operation. This adds a new rx_skb_func when the
netdev has an MTU that prevents the packets from sitting in a
single page.
This also make sure that GRO/LRO stay disabled even when using
the aggregation ring for large buffers.
v3: Use BNXT_PAGE_MODE_BUF_SIZE for build_skb
Signed-off-by: Andy Gospodarek <gospo@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
If we are using aggregation rings with XDP enabled, allocate page
buffers for the aggregation rings from the page_pool.
Signed-off-by: Andy Gospodarek <gospo@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Modify ring header data split and jumbo parameters to account
for the fact that the design for XDP multibuffer puts close to
the first 4k of data in a page and the remaining portions of
the packet go in the aggregation ring.
v3: Simplified code around initial buffer size calculation
Signed-off-by: Andy Gospodarek <gospo@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Set the pfmemaloc flag in the xdp buff so that this can be
copied to the skb if needed for an XDP_PASS action.
Signed-off-by: Andy Gospodarek <gospo@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This patch adds a new function that will read pages from the
aggregation ring and create an xdp_buff with frags based on
the entries in the aggregation ring.
Signed-off-by: Andy Gospodarek <gospo@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Clarify that this is reading buffers from the aggregation ring.
Signed-off-by: Andy Gospodarek <gospo@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Rather than operating on an sk_buff, add frags from the aggregation
ring into the frags of an skb_shared_info. This will allow the
caller to use either an sk_buff or xdp_buff.
Signed-off-by: Andy Gospodarek <gospo@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This will be used to determine if bnxt_rx_xdp should be called
rather than calling it every time.
Signed-off-by: Andy Gospodarek <gospo@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Move initialization of xdp_buff outside of bnxt_rx_xdp to prepare
for allowing bnxt_rx_xdp to operate on multibuffer xdp_buffs.
v2: Fix uninitalized variables warning in bnxt_xdp.c.
v3: Add new define BNXT_PAGE_MODE_BUF_SIZE
Signed-off-by: Andy Gospodarek <gospo@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Jakub Kicinski says:
====================
tls: rx: random refactoring part 1
TLS Rx refactoring. Part 1 of 3. A couple of features to follow.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
Instead of tls_device poking into internals of the message
return 1 from tls_device_decrypted() if the device handled
the decryption.
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Use early return and a jump label to remove two indentation levels.
No functional changes.
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
We inform the applications that data is available when
the record is received. Decryption happens inline inside
recvmsg or splice call. Generating another wakeup inside
the decryption handler seems pointless as someone must
be actively reading the socket if we are executing this
code.
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
The padding length TLS 1.3 logic is searching for content_type from
the end of text. IMHO the code is easier to parse if we calculate
offset and decrement it rather than try to maintain positive offset
from the end of the record called "back".
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
TLS 1.3 has to strip padding, and it starts out 16 bytes
from the end of the record. Make it clear this is because
of the auth tag.
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
We set the record type in tls_read_size(), can as well init
the tlm->decrypted field there.
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Similar justification to previous change, the information
about decryption status belongs in the skb.
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Original TLS implementation was handling one record at a time.
It stashed the type of the record inside tls context (per socket
structure) for convenience. When async crypto support was added
[1] the author had to use skb->cb to store the type per-message.
The use of skb->cb overlaps with strparser, however, so a hybrid
approach was taken where type is stored in context while parsing
(since we parse a message at a time) but once parsed its copied
to skb->cb.
Recently a workaround for sockmaps [2] exposed the previously
private struct _strp_msg and started a trend of adding user
fields directly in strparser's header. This is cleaner than
storing information about an skb in the context.
This change is not strictly necessary, but IMHO the ownership
of the context field is confusing. Information naturally
belongs to the skb.
[1] commit 94524d8fc9 ("net/tls: Add support for async decryption of tls records")
[2] commit b2c4618162 ("bpf, sockmap: sk_skb data_end access incorrect when src_reg = dst_reg")
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Pointless else branch after goto makes the code harder to refactor
down the line.
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
'recv_end:' checks num_async and decrypted, and is then followed
by the 'end' label. Since we know that decrypted and num_async
are 0 at the start we can jump to 'end'.
Move the init of decrypted and num_async to let the compiler
catch if I'm wrong.
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
There is no need to increment the module refcount again, its enough to
obtain one reference per object, i.e. take a reference on object
creation and put it on object destruction.
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This allows code re-use in the followup patch.
No functional changes intended.
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
This makes it easier for a followup patch to only expose ecache
related parts of nf_conntrack_net structure.
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
That being useful for debugging purposes.
Notice that the packet descriptor is in "private" guest memory, so
that Hyper-V can not tamper with it.
While at it, remove two unnecessary u64-casts.
Signed-off-by: Andrea Parri (Microsoft) <parri.andrea@gmail.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
The define for_each_pci_dev(d) is:
while ((d = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, d)) != NULL)
Thus, the list iterator 'd' is always non-NULL so it doesn't need to
be checked. So just remove the unnecessary NULL check. Also remove the
unnecessary initializer because the list iterator is always initialized.
Signed-off-by: Xiaomeng Tong <xiam0nd.tong@gmail.com>
Link: https://lore.kernel.org/r/20220406015921.29267-1-xiam0nd.tong@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Even if an IOMMU might be present for some PCI segment in the system,
that doesn't necessarily mean it provides translation for the device
we care about. It appears that what we care about here is specifically
whether DMA mapping ops involve any IOMMU overhead or not, so check for
translation actually being active for our device.
Signed-off-by: Robin Murphy <robin.murphy@arm.com>
Acked-by: Edward Cree <ecree.xilinx@gmail.com>
Link: https://lore.kernel.org/r/7350f957944ecfce6cce90f422e3992a1f428775.1649166055.git.robin.murphy@arm.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
As noted in the original commit 685343fc3b ("net: add
name_assign_type netdev attribute")
... when the kernel has given the interface a name using global
device enumeration based on order of discovery (ethX, wlanY, etc)
... are labelled NET_NAME_ENUM.
That describes this case, so set the default for the devices here to
NET_NAME_ENUM. Current popular network setup tools like systemd use
this only to warn if you're setting static settings on interfaces that
might change, so it is expected this only leads to better user
information, but not changing of interfaces, etc.
Signed-off-by: Ian Wienand <iwienand@redhat.com>
Link: https://lore.kernel.org/r/20220406093635.1601506-1-iwienand@redhat.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
BPF_USDT_ARG_REG_DEREF handling always reads 8 bytes, regardless of
the actual argument size. On little-endian the relevant argument bits
end up in the lower bits of val, and later on the code that handles
all the argument types expects them to be there.
On big-endian they end up in the upper bits of val, breaking that
expectation. Fix by right-shifting val on big-endian.
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20220407214411.257260-3-iii@linux.ibm.com
Fix several typos and references to non-existing headers.
Also use __BYTE_ORDER__ instead of __BYTE_ORDER for consistency with
the rest of the bpf code - see commit 45f2bebc80 ("libbpf: Fix
endianness detection in BPF_CORE_READ_BITFIELD_PROBED()") for
rationale).
Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20220407214411.257260-2-iii@linux.ibm.com
The congestion status of a tcp flow may be updated since there
is congestion between tcp sender and receiver. It makes sense to
add tracepoint for congestion status set function to summate cc
status duration and evaluate the performance of network
and congestion algorithm. the backgound of this patch is below.
Link: https://github.com/iovisor/bcc/pull/3899
Signed-off-by: Ping Gan <jacky_gam_2001@163.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Link: https://lore.kernel.org/r/20220406010956.19656-1-jacky_gam_2001@163.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Increment rx_otherhost_dropped counter when packet dropped due to
mismatched dest MAC addr.
An example when this drop can occur is when manually crafting raw
packets that will be consumed by a user space application via a tap
device. For testing purposes local traffic was generated using trafgen
for the client and netcat to start a server
Tested: Created 2 netns, sent 1 packet using trafgen from 1 to the other
with "{eth(daddr=$INCORRECT_MAC...}", verified that iproute2 showed the
counter was incremented. (Also had to modify iproute2 to show the stat,
additional patch for that coming next.)
Signed-off-by: Jeffrey Ji <jeffreyji@google.com>
Reviewed-by: Brian Vazquez <brianvv@google.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Link: https://lore.kernel.org/r/20220406172600.1141083-1-jeffreyjilinux@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Jakub Kicinski says:
====================
net: create a net/core/ internal header
We are adding stuff to netdevice.h which really should be
local to net/core/. Create a net/core/dev.h header and use it.
Minor cleanups precede.
====================
Link: https://lore.kernel.org/r/20220406213754.731066-1-kuba@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
There's a number of functions and static variables used
under net/core/ but not from the outside. We currently
dump most of them into netdevice.h. That bad for many
reasons:
- netdevice.h is very cluttered, hard to figure out
what the APIs are;
- netdevice.h is very long;
- we have to touch netdevice.h more which causes expensive
incremental builds.
Create a header under net/core/ and move some declarations.
The new header is also a bit of a catch-all but that's
fine, if we create more specific headers people will
likely over-think where their declaration fit best.
And end up putting them in netdevice.h, again.
More work should be done on splitting netdevice.h into more
targeted headers, but that'd be more time consuming so small
steps.
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
We have a bunch of functions which are only used under
net/core/ yet they get exported. Remove the exports.
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Following patch will hide that typedef. There seems to be
no strong reason for hyperv to use it, so let's not.
Acked-by: Wei Liu <wei.liu@kernel.org>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
As reported by Naresh:
perf build errors on i386 [1] on Linux next-20220407 [2]
usdt.c:1181:5: error: "__x86_64__" is not defined, evaluates to 0
[-Werror=undef]
1181 | #if __x86_64__
| ^~~~~~~~~~
usdt.c:1196:5: error: "__x86_64__" is not defined, evaluates to 0
[-Werror=undef]
1196 | #if __x86_64__
| ^~~~~~~~~~
cc1: all warnings being treated as errors
Use #ifdef instead of #if to avoid this.
Fixes: 4c59e584d1 ("libbpf: Add x86-specific USDT arg spec parsing logic")
Reported-by: Naresh Kamboju <naresh.kamboju@linaro.org>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20220407203842.3019904-1-andrii@kernel.org
Alan Maguire says:
====================
Follow-up series to [1] to address some suggestions from Andrii to
improve parsing and make it more robust (patches 1, 2) and to improve
validation of u[ret]probe firing by validating expected argument
and return values (patch 3).
[1] https://lore.kernel.org/bpf/164903521182.13106.12656654142629368774.git-patchwork-notify@kernel.org/
Changes since v1:
- split library name, auto-attach parsing into separate patches (Andrii, patches 1, 2)
- made str_has_sfx() static inline, avoided repeated strlen()s by storing lengths,
used strlen() instead of strnlen() (Andrii, patch 1)
- fixed sscanf() arg to use %li, switched logging to use "prog '%s'" format,
used direct strcmp() on probe_type instead of prefix check (Andrii, patch 2)
- switched auto-attach tests to log parameter/return values to be checked by
user-space side of tests. Needed to add pid filtering to avoid capturing
stray malloc()s (Andrii, patch 3)
====================
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
uprobe/uretprobe tests don't do any validation of arguments/return values,
and without this we can't be sure we are attached to the right function,
or that we are indeed attached to a uprobe or uretprobe. To fix this
record argument and return value for auto-attached functions and ensure
these match expectations. Also need to filter by pid to ensure we do
not pick up stray malloc()s since auto-attach traces libc system-wide.
Suggested-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Alan Maguire <alan.maguire@oracle.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/1649245431-29956-4-git-send-email-alan.maguire@oracle.com
For uprobe auto-attach, the parsing can be simplified for the SEC()
name to a single sscanf(); the return value of the sscanf can then
be used to distinguish between sections that simply specify
"u[ret]probe" (and thus cannot auto-attach), those that specify
"u[ret]probe/binary_path:function+offset" etc.
Suggested-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Alan Maguire <alan.maguire@oracle.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/1649245431-29956-3-git-send-email-alan.maguire@oracle.com
In the process of doing path resolution for uprobe attach, libraries are
identified by matching a ".so" substring in the binary_path.
This matches a lot of patterns that do not conform to library.so[.version]
format, so instead match a ".so" _suffix_, and if that fails match a
".so." substring for the versioned library case.
Suggested-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Alan Maguire <alan.maguire@oracle.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/1649245431-29956-2-git-send-email-alan.maguire@oracle.com
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Merge tag 'random-5.18-rc2-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/crng/random
Pull random number generator fixes from Jason Donenfeld:
- Another fixup to the fast_init/crng_init split, this time in how much
entropy is being credited, from Jan Varho.
- As discussed, we now opportunistically call try_to_generate_entropy()
in /dev/urandom reads, as a replacement for the reverted commit. I
opted to not do the more invasive wait_for_random_bytes() change at
least for now, preferring to do something smaller and more obvious
for the time being, but maybe that can be revisited as things evolve
later.
- Userspace can use FUSE or userfaultfd or simply move a process to
idle priority in order to make a read from the random device never
complete, which breaks forward secrecy, fixed by overwriting
sensitive bytes early on in the function.
- Jann Horn noticed that /dev/urandom reads were only checking for
pending signals if need_resched() was true, a bug going back to the
genesis commit, now fixed by always checking for signal_pending() and
calling cond_resched(). This explains various noticeable signal
delivery delays I've seen in programs over the years that do long
reads from /dev/urandom.
- In order to be more like other devices (e.g. /dev/zero) and to
mitigate the impact of fixing the above bug, which has been around
forever (users have never really needed to check the return value of
read() for medium-sized reads and so perhaps many didn't), we now
move signal checking to the bottom part of the loop, and do so every
PAGE_SIZE-bytes.
* tag 'random-5.18-rc2-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/crng/random:
random: check for signals every PAGE_SIZE chunk of /dev/[u]random
random: check for signal_pending() outside of need_resched() check
random: do not allow user to keep crng key around on stack
random: opportunistically initialize on /dev/urandom reads
random: do not split fast init input in add_hwgenerator_randomness()
A small set of fixes for 5.18-rc2:
* Fix a compilation warning due to an uninitialized variable in
ata_sff_lost_interrupt(), from me.
* Fix invalid internal command tag handling in the sata_dwc_460ex
driver, from Christian.
* Disable READ LOG DMA EXT with Samsung 840 EVO SSDs as this command
causes the drives to hang, from Christian.
* Change the config option CONFIG_SATA_LPM_POLICY back to its original
name CONFIG_SATA_LPM_MOBILE_POLICY to avoid potential problems with
users losing their configuration (as discussed during the merge
window), from Mario.
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Merge tag 'ata-5.18-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/dlemoal/libata
Pull ata fixes from Damien Le Moal:
- Fix a compilation warning due to an uninitialized variable in
ata_sff_lost_interrupt(), from me.
- Fix invalid internal command tag handling in the sata_dwc_460ex
driver, from Christian.
- Disable READ LOG DMA EXT with Samsung 840 EVO SSDs as this command
causes the drives to hang, from Christian.
- Change the config option CONFIG_SATA_LPM_POLICY back to its original
name CONFIG_SATA_LPM_MOBILE_POLICY to avoid potential problems with
users losing their configuration (as discussed during the merge
window), from Mario.
* tag 'ata-5.18-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/dlemoal/libata:
ata: ahci: Rename CONFIG_SATA_LPM_POLICY configuration item back
ata: libata-core: Disable READ LOG DMA EXT for Samsung 840 EVOs
ata: sata_dwc_460ex: Fix crash due to OOB write
ata: libata-sff: Fix compilation warning in ata_sff_lost_interrupt()
Trade text size for rodata size and replace tons of nested if-elses
to the const mask match based structs. The almost entire
ice_find_dummy_packet() now becomes just one plain while-increment
loop. The order in ice_dummy_pkt_profiles[] should be same with the
if-elses order previously, as masks become less and less strict
through the array to follow the original code flow.
Apart from removing 80 locs of 4-level if-elses, it brings a solid
text size optimization:
add/remove: 0/1 grow/shrink: 1/1 up/down: 2/-1058 (-1056)
Function old new delta
ice_fill_adv_dummy_packet 289 291 +2
ice_adv_add_update_vsi_list 201 - -201
ice_add_adv_rule 2950 2093 -857
Total: Before=414512, After=413456, chg -0.25%
add/remove: 53/52 grow/shrink: 0/0 up/down: 4660/-3988 (672)
RO Data old new delta
ice_dummy_pkt_profiles - 672 +672
Total: Before=37895, After=38567, chg +1.77%
Signed-off-by: Alexander Lobakin <alexandr.lobakin@intel.com>
Reviewed-by: Michal Swiatkowski <michal.swiatkowski@linux.intel.com>
Tested-by: Marcin Szycik <marcin.szycik@linux.intel.com>
Tested-by: Sandeep Penigalapati <sandeep.penigalapati@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Declarations of dummy/template packet headers and offsets can be
minified to improve readability and simplify adding new templates.
Move all the repetitive constructions into two macros and let them
do the name and type expansions.
Linewrap removal is yet another positive side effect.
Signed-off-by: Alexander Lobakin <alexandr.lobakin@intel.com>
Reviewed-by: Michal Swiatkowski <michal.swiatkowski@linux.intel.com>
Tested-by: Marcin Szycik <marcin.szycik@linux.intel.com>
Tested-by: Sandeep Penigalapati <sandeep.penigalapati@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
