Merge remote-tracking branch 'drm/drm-next' into msm-next

Back-merge drm-next to (indirectly) get arm-smmu updates for making
stall-on-fault more reliable.

Signed-off-by: Rob Clark <robin.clark@oss

Merge remote-tracking branch 'drm/drm-next' into msm-next

Back-merge drm-next to (indirectly) get arm-smmu updates for making
stall-on-fault more reliable.

Signed-off-by: Rob Clark <robin.clark@oss.qualcomm.com>

show more ...

Merge drm/drm-next into drm-misc-next

Backmerging to forward to v6.16-rc1

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>

Merge drm/drm-next into drm-xe-next

Backmerging to bring in 6.16

Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>

Merge drm/drm-next into drm-intel-next

Sync to v6.16-rc1, among other things to get the fixed size GENMASK_U*()
and BIT_U*() macros.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>

Merge drm/drm-next into drm-intel-gt-next

Need to pull in a67221b5eb8d ("drm/i915/dp: Return min bpc supported by source instead of 0")
in order to fix build breakage on GCC 9.4.0 (from Ubuntu 20.04

Merge drm/drm-next into drm-intel-gt-next

Need to pull in a67221b5eb8d ("drm/i915/dp: Return min bpc supported by source instead of 0")
in order to fix build breakage on GCC 9.4.0 (from Ubuntu 20.04).

Signed-off-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>

show more ...

Merge drm/drm-next into drm-intel-next

Backmerge to sync with v6.15-rc, xe, and specifically async flip changes
in drm-misc.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>

Merge branch 'next' into for-linus

Prepare input updates for 6.16 merge window.

Merge tag 'v6.15-rc6' into next

Sync up with mainline to bring in xpad controller changes.

Merge tag 'net-next-6.16' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next

Pull networking updates from Paolo Abeni:
"Core:

- Implement the Device Memory TCP transmit path, allo

Merge tag 'net-next-6.16' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next

Pull networking updates from Paolo Abeni:
"Core:

- Implement the Device Memory TCP transmit path, allowing zero-copy
data transmission on top of TCP from e.g. GPU memory to the wire.

- Move all the IPv6 routing tables management outside the RTNL scope,
under its own lock and RCU. The route control path is now 3x times
faster.

- Convert queue related netlink ops to instance lock, reducing again
the scope of the RTNL lock. This improves the control plane
scalability.

- Refactor the software crc32c implementation, removing unneeded
abstraction layers and improving significantly the related
micro-benchmarks.

- Optimize the GRO engine for UDP-tunneled traffic, for a 10%
performance improvement in related stream tests.

- Cover more per-CPU storage with local nested BH locking; this is a
prep work to remove the current per-CPU lock in local_bh_disable()
on PREMPT_RT.

- Introduce and use nlmsg_payload helper, combining buffer bounds
verification with accessing payload carried by netlink messages.

Netfilter:

- Rewrite the procfs conntrack table implementation, improving
considerably the dump performance. A lot of user-space tools still
use this interface.

- Implement support for wildcard netdevice in netdev basechain and
flowtables.

- Integrate conntrack information into nft trace infrastructure.

- Export set count and backend name to userspace, for better
introspection.

BPF:

- BPF qdisc support: BPF-qdisc can be implemented with BPF struct_ops
programs and can be controlled in similar way to traditional qdiscs
using the "tc qdisc" command.

- Refactor the UDP socket iterator, addressing long standing issues
WRT duplicate hits or missed sockets.

Protocols:

- Improve TCP receive buffer auto-tuning and increase the default
upper bound for the receive buffer; overall this improves the
single flow maximum thoughput on 200Gbs link by over 60%.

- Add AFS GSSAPI security class to AF_RXRPC; it provides transport
security for connections to the AFS fileserver and VL server.

- Improve TCP multipath routing, so that the sources address always
matches the nexthop device.

- Introduce SO_PASSRIGHTS for AF_UNIX, to allow disabling SCM_RIGHTS,
and thus preventing DoS caused by passing around problematic FDs.

- Retire DCCP socket. DCCP only receives updates for bugs, and major
distros disable it by default. Its removal allows for better
organisation of TCP fields to reduce the number of cache lines hit
in the fast path.

- Extend TCP drop-reason support to cover PAWS checks.

Driver API:

- Reorganize PTP ioctl flag support to require an explicit opt-in for
the drivers, avoiding the problem of drivers not rejecting new
unsupported flags.

- Converted several device drivers to timestamping APIs.

- Introduce per-PHY ethtool dump helpers, improving the support for
dump operations targeting PHYs.

Tests and tooling:

- Add support for classic netlink in user space C codegen, so that
ynl-c can now read, create and modify links, routes addresses and
qdisc layer configuration.

- Add ynl sub-types for binary attributes, allowing ynl-c to output
known struct instead of raw binary data, clarifying the classic
netlink output.

- Extend MPTCP selftests to improve the code-coverage.

- Add tests for XDP tail adjustment in AF_XDP.

New hardware / drivers:

- OpenVPN virtual driver: offload OpenVPN data channels processing to
the kernel-space, increasing the data transfer throughput WRT the
user-space implementation.

- Renesas glue driver for the gigabit ethernet RZ/V2H(P) SoC.

- Broadcom asp-v3.0 ethernet driver.

- AMD Renoir ethernet device.

- ReakTek MT9888 2.5G ethernet PHY driver.

- Aeonsemi 10G C45 PHYs driver.

Drivers:

- Ethernet high-speed NICs:
- nVidia/Mellanox (mlx5):
- refactor the steering table handling to significantly
reduce the amount of memory used
- add support for complex matches in H/W flow steering
- improve flow streeing error handling
- convert to netdev instance locking
- Intel (100G, ice, igb, ixgbe, idpf):
- ice: add switchdev support for LLDP traffic over VF
- ixgbe: add firmware manipulation and regions devlink support
- igb: introduce support for frame transmission premption
- igb: adds persistent NAPI configuration
- idpf: introduce RDMA support
- idpf: add initial PTP support
- Meta (fbnic):
- extend hardware stats coverage
- add devlink dev flash support
- Broadcom (bnxt):
- add support for RX-side device memory TCP
- Wangxun (txgbe):
- implement support for udp tunnel offload
- complete PTP and SRIOV support for AML 25G/10G devices

- Ethernet NICs embedded and virtual:
- Google (gve):
- add device memory TCP TX support
- Amazon (ena):
- support persistent per-NAPI config
- Airoha:
- add H/W support for L2 traffic offload
- add per flow stats for flow offloading
- RealTek (rtl8211): add support for WoL magic packet
- Synopsys (stmmac):
- dwmac-socfpga 1000BaseX support
- add Loongson-2K3000 support
- introduce support for hardware-accelerated VLAN stripping
- Broadcom (bcmgenet):
- expose more H/W stats
- Freescale (enetc, dpaa2-eth):
- enetc: add MAC filter, VLAN filter RSS and loopback support
- dpaa2-eth: convert to H/W timestamping APIs
- vxlan: convert FDB table to rhashtable, for better scalabilty
- veth: apply qdisc backpressure on full ring to reduce TX drops

- Ethernet switches:
- Microchip (kzZ88x3): add ETS scheduler support

- Ethernet PHYs:
- RealTek (rtl8211):
- add support for WoL magic packet
- add support for PHY LEDs

- CAN:
- Adds RZ/G3E CANFD support to the rcar_canfd driver.
- Preparatory work for CAN-XL support.
- Add self-tests framework with support for CAN physical interfaces.

- WiFi:
- mac80211:
- scan improvements with multi-link operation (MLO)
- Qualcomm (ath12k):
- enable AHB support for IPQ5332
- add monitor interface support to QCN9274
- add multi-link operation support to WCN7850
- add 802.11d scan offload support to WCN7850
- monitor mode for WCN7850, better 6 GHz regulatory
- Qualcomm (ath11k):
- restore hibernation support
- MediaTek (mt76):
- WiFi-7 improvements
- implement support for mt7990
- Intel (iwlwifi):
- enhanced multi-link single-radio (EMLSR) support on 5 GHz links
- rework device configuration
- RealTek (rtw88):
- improve throughput for RTL8814AU
- RealTek (rtw89):
- add multi-link operation support
- STA/P2P concurrency improvements
- support different SAR configs by antenna

- Bluetooth:
- introduce HCI Driver protocol
- btintel_pcie: do not generate coredump for diagnostic events
- btusb: add HCI Drv commands for configuring altsetting
- btusb: add RTL8851BE device 0x0bda:0xb850
- btusb: add new VID/PID 13d3/3584 for MT7922
- btusb: add new VID/PID 13d3/3630 and 13d3/3613 for MT7925
- btnxpuart: implement host-wakeup feature"

* tag 'net-next-6.16' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1611 commits)
selftests/bpf: Fix bpf selftest build warning
selftests: netfilter: Fix skip of wildcard interface test
net: phy: mscc: Stop clearing the the UDPv4 checksum for L2 frames
net: openvswitch: Fix the dead loop of MPLS parse
calipso: Don't call calipso functions for AF_INET sk.
selftests/tc-testing: Add a test for HFSC eltree double add with reentrant enqueue behaviour on netem
net_sched: hfsc: Address reentrant enqueue adding class to eltree twice
octeontx2-pf: QOS: Refactor TC_HTB_LEAF_DEL_LAST callback
octeontx2-pf: QOS: Perform cache sync on send queue teardown
net: mana: Add support for Multi Vports on Bare metal
net: devmem: ncdevmem: remove unused variable
net: devmem: ksft: upgrade rx test to send 1K data
net: devmem: ksft: add 5 tuple FS support
net: devmem: ksft: add exit_wait to make rx test pass
net: devmem: ksft: add ipv4 support
net: devmem: preserve sockc_err
page_pool: fix ugly page_pool formatting
net: devmem: move list_add to net_devmem_bind_dmabuf.
selftests: netfilter: nft_queue.sh: include file transfer duration in log message
net: phy: mscc: Fix memory leak when using one step timestamping
...

show more ...

Merge remote-tracking branch 'drm-misc/drm-misc-next' into msm-next

Merge drm-misc-next to get commit Fixes: fec450ca15af ("drm/display:
hdmi: provide central data authority for ACR params").

Signe

Merge remote-tracking branch 'drm-misc/drm-misc-next' into msm-next

Merge drm-misc-next to get commit Fixes: fec450ca15af ("drm/display:
hdmi: provide central data authority for ACR params").

Signed-off-by: Rob Clark <robdclark@chromium.org>

show more ...

Merge drm/drm-next into drm-xe-next

Backmerge to bring in linux 6.15-rc.

Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>

Merge branch 'rxrpc-afs-add-afs-gssapi-security-class-to-af_rxrpc-and-kafs'

David Howells says:

====================
rxrpc, afs: Add AFS GSSAPI security class to AF_RXRPC and kafs

Here's a set of

Merge branch 'rxrpc-afs-add-afs-gssapi-security-class-to-af_rxrpc-and-kafs'

David Howells says:

====================
rxrpc, afs: Add AFS GSSAPI security class to AF_RXRPC and kafs

Here's a set of patches to add basic support for the AFS GSSAPI security
class to AF_RXRPC and kafs. It provides transport security for keys that
match the security index 6 (YFS) for connections to the AFS fileserver and
VL server.

Note that security index 4 (OpenAFS) can also be supported using this, but
it needs more work as it's slightly different.

The patches also provide the ability to secure the callback channel -
connections from the fileserver back to the client that are used to pass
file change notifications, amongst other things. When challenged by the
fileserver, kafs will generate a token specific to that server and include
it in the RESPONSE packet as the appdata. The server then extracts this
and uses it to send callback RPC calls back to the client.

It can also be used to provide transport security on the callback channel,
but a further set of patches is required to provide the token and key to
set that up when the client responds to the fileserver's challenge.

This makes use of the previously added crypto-krb5 library that is now
upstream (last commit fc0cf10c04f4).

This series of patches consist of the following parts:

(0) Update kdoc comments to remove some kdoc builder warnings.

(1) Push reponding to CHALLENGE packets over to recvmsg() or the kernel
equivalent so that the application layer can include user-defined
information in the RESPONSE packet. In a follow-up patch set, this
will allow the callback channel to be secured by the AFS filesystem.

(2) Add the AF_RXRPC RxGK security class that uses a key obtained from the
AFS GSS security service to do Kerberos 5-based encryption instead of
pcbc(fcrypt) and pcbc(des).

(3) Add support for callback channel encryption in kafs.

(4) Provide the test rxperf server module with some fixed krb5 keys.
====================

Link: https://patch.msgid.link/20250411095303.2316168-1-dhowells@redhat.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

show more ...

rxrpc: Add the security index for yfs-rxgk

Add the security index and abort codes for the YFS variant of rxgk.

Signed-off-by: David Howells <dhowells@redhat.com>
Link: https://patch.msgid.link/2025

rxrpc: Add the security index for yfs-rxgk

Add the security index and abort codes for the YFS variant of rxgk.

Signed-off-by: David Howells <dhowells@redhat.com>
Link: https://patch.msgid.link/20250411095303.2316168-6-dhowells@redhat.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

show more ...

Merge drm/drm-next into drm-misc-next

Backmerging to get v6.15-rc1 into drm-misc-next. Also fixes a
build issue when enabling CONFIG_DRM_SCHED_KUNIT_TEST.

Signed-off-by: Thomas Zimmermann <tzimmerm

Merge drm/drm-next into drm-misc-next

Backmerging to get v6.15-rc1 into drm-misc-next. Also fixes a
build issue when enabling CONFIG_DRM_SCHED_KUNIT_TEST.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>

show more ...

Merge tag 'v6.15-rc1' into x86/cpu, to refresh the branch with upstream changes

Signed-off-by: Ingo Molnar <mingo@kernel.org>

Merge tag 'v6.15-rc1' into x86/asm, to refresh the branch

Signed-off-by: Ingo Molnar <mingo@kernel.org>

Merge drm/drm-fixes into drm-misc-fixes

Backmerging to get updates from v6.15-rc1.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>

Merge tag 'v6.15-p1' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6

Pull crypto updates from Herbert Xu:
"API:
- Remove legacy compression interface
- Improve scatterwalk

Merge tag 'v6.15-p1' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6

Pull crypto updates from Herbert Xu:
"API:
- Remove legacy compression interface
- Improve scatterwalk API
- Add request chaining to ahash and acomp
- Add virtual address support to ahash and acomp
- Add folio support to acomp
- Remove NULL dst support from acomp

Algorithms:
- Library options are fuly hidden (selected by kernel users only)
- Add Kerberos5 algorithms
- Add VAES-based ctr(aes) on x86
- Ensure LZO respects output buffer length on compression
- Remove obsolete SIMD fallback code path from arm/ghash-ce

Drivers:
- Add support for PCI device 0x1134 in ccp
- Add support for rk3588's standalone TRNG in rockchip
- Add Inside Secure SafeXcel EIP-93 crypto engine support in eip93
- Fix bugs in tegra uncovered by multi-threaded self-test
- Fix corner cases in hisilicon/sec2

Others:
- Add SG_MITER_LOCAL to sg miter
- Convert ubifs, hibernate and xfrm_ipcomp from legacy API to acomp"

* tag 'v6.15-p1' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6: (187 commits)
crypto: testmgr - Add multibuffer acomp testing
crypto: acomp - Fix synchronous acomp chaining fallback
crypto: testmgr - Add multibuffer hash testing
crypto: hash - Fix synchronous ahash chaining fallback
crypto: arm/ghash-ce - Remove SIMD fallback code path
crypto: essiv - Replace memcpy() + NUL-termination with strscpy()
crypto: api - Call crypto_alg_put in crypto_unregister_alg
crypto: scompress - Fix incorrect stream freeing
crypto: lib/chacha - remove unused arch-specific init support
crypto: remove obsolete 'comp' compression API
crypto: compress_null - drop obsolete 'comp' implementation
crypto: cavium/zip - drop obsolete 'comp' implementation
crypto: zstd - drop obsolete 'comp' implementation
crypto: lzo - drop obsolete 'comp' implementation
crypto: lzo-rle - drop obsolete 'comp' implementation
crypto: lz4hc - drop obsolete 'comp' implementation
crypto: lz4 - drop obsolete 'comp' implementation
crypto: deflate - drop obsolete 'comp' implementation
crypto: 842 - drop obsolete 'comp' implementation
crypto: nx - Migrate to scomp API
...

show more ...

Merge tag 'crypto-krb5-20250303' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs.git

Pull Kerberos crypto library from David Howells:

crypto: Add Kerberos crypto lib

It does a c

Merge tag 'crypto-krb5-20250303' of git://git.kernel.org/pub/scm/linux/kernel/git/dhowells/linux-fs.git

Pull Kerberos crypto library from David Howells:

crypto: Add Kerberos crypto lib

It does a couple of things:

(1) Provide an AEAD crypto driver, krb5enc, that mirrors the authenc
driver, but that hashes the plaintext, not the ciphertext. This was
made a separate module rather than just being a part of the authenc
driver because it has to do all of the constituent operations in the
opposite order - which impacts the async op handling.

Testmgr data is provided for AES+SHA2 and Camellia combinations of
authenc and krb5enc used by the krb5 library. AES+SHA1 is not
provided as the RFCs don't contain usable test vectors.

(2) Provide a Kerberos 5 crypto library. This is an extract from the
sunrpc driver as that code can be shared between sunrpc/nfs and
rxrpc/afs. This provides encryption, decryption, get MIC and verify
MIC routines that use and wrap the crypto functions, along with some
functions to provide layout management.

This supports AES+SHA1, AES+SHA2 and Camellia encryption types.

Self-testing is provided that goes further than is possible with
testmgr, doing subkey derivation as well.

The patches were previously posted here:

https://lore.kernel.org/r/20250203142343.248839-1-dhowells@redhat.com/

as part of a larger series, but the networking guys would prefer these to
go through the crypto tree. If you want them reposting independently, I
can do that.

show more ...

crypto/krb5: Implement the Camellia enctypes from rfc6803

Implement the camellia128-cts-cmac and camellia256-cts-cmac enctypes from
rfc6803.

Note that the test vectors in rfc6803 for encryption are

crypto/krb5: Implement the Camellia enctypes from rfc6803

Implement the camellia128-cts-cmac and camellia256-cts-cmac enctypes from
rfc6803.

Note that the test vectors in rfc6803 for encryption are incomplete,
lacking the key usage number needed to derive Ke and Ki, and there are
errata for this:

https://www.rfc-editor.org/errata_search.php?rfc=6803

Signed-off-by: David Howells <dhowells@redhat.com>
cc: Herbert Xu <herbert@gondor.apana.org.au>
cc: "David S. Miller" <davem@davemloft.net>
cc: Chuck Lever <chuck.lever@oracle.com>
cc: Marc Dionne <marc.dionne@auristor.com>
cc: Eric Dumazet <edumazet@google.com>
cc: Jakub Kicinski <kuba@kernel.org>
cc: Paolo Abeni <pabeni@redhat.com>
cc: Simon Horman <horms@kernel.org>
cc: linux-afs@lists.infradead.org
cc: linux-nfs@vger.kernel.org
cc: linux-crypto@vger.kernel.org
cc: netdev@vger.kernel.org

show more ...

crypto/krb5: Implement the AES enctypes from rfc8009

Implement the aes128-cts-hmac-sha256-128 and aes256-cts-hmac-sha384-192
enctypes from rfc8009, overriding the rfc3961 kerberos 5 simplified crypt

crypto/krb5: Implement the AES enctypes from rfc8009

Implement the aes128-cts-hmac-sha256-128 and aes256-cts-hmac-sha384-192
enctypes from rfc8009, overriding the rfc3961 kerberos 5 simplified crypto
scheme.

Signed-off-by: David Howells <dhowells@redhat.com>
cc: Herbert Xu <herbert@gondor.apana.org.au>
cc: "David S. Miller" <davem@davemloft.net>
cc: Chuck Lever <chuck.lever@oracle.com>
cc: Marc Dionne <marc.dionne@auristor.com>
cc: Eric Dumazet <edumazet@google.com>
cc: Jakub Kicinski <kuba@kernel.org>
cc: Paolo Abeni <pabeni@redhat.com>
cc: Simon Horman <horms@kernel.org>
cc: linux-afs@lists.infradead.org
cc: linux-nfs@vger.kernel.org
cc: linux-crypto@vger.kernel.org
cc: netdev@vger.kernel.org

show more ...

crypto/krb5: Provide infrastructure and key derivation

Provide key derivation interface functions and a helper to implement the
PRF+ function from rfc4402.

Signed-off-by: David Howells <dhowells@re

crypto/krb5: Provide infrastructure and key derivation

Provide key derivation interface functions and a helper to implement the
PRF+ function from rfc4402.

Signed-off-by: David Howells <dhowells@redhat.com>
cc: Herbert Xu <herbert@gondor.apana.org.au>
cc: "David S. Miller" <davem@davemloft.net>
cc: Chuck Lever <chuck.lever@oracle.com>
cc: Marc Dionne <marc.dionne@auristor.com>
cc: Eric Dumazet <edumazet@google.com>
cc: Jakub Kicinski <kuba@kernel.org>
cc: Paolo Abeni <pabeni@redhat.com>
cc: Simon Horman <horms@kernel.org>
cc: linux-afs@lists.infradead.org
cc: linux-nfs@vger.kernel.org
cc: linux-crypto@vger.kernel.org
cc: netdev@vger.kernel.org

show more ...

crypto/krb5: Add an API to perform requests

Add an API by which users of the krb5 crypto library can perform crypto
requests, such as encrypt, decrypt, get_mic and verify_mic. These
functions take

crypto/krb5: Add an API to perform requests

Add an API by which users of the krb5 crypto library can perform crypto
requests, such as encrypt, decrypt, get_mic and verify_mic. These
functions take the previously prepared crypto objects to work on.

Signed-off-by: David Howells <dhowells@redhat.com>
cc: Herbert Xu <herbert@gondor.apana.org.au>
cc: "David S. Miller" <davem@davemloft.net>
cc: Chuck Lever <chuck.lever@oracle.com>
cc: Marc Dionne <marc.dionne@auristor.com>
cc: Eric Dumazet <edumazet@google.com>
cc: Jakub Kicinski <kuba@kernel.org>
cc: Paolo Abeni <pabeni@redhat.com>
cc: Simon Horman <horms@kernel.org>
cc: linux-afs@lists.infradead.org
cc: linux-nfs@vger.kernel.org
cc: linux-crypto@vger.kernel.org
cc: netdev@vger.kernel.org

show more ...

crypto/krb5: Add an API to alloc and prepare a crypto object

Add an API by which users of the krb5 crypto library can get an allocated
and keyed crypto object.

For encryption-mode operation, an AEA

crypto/krb5: Add an API to alloc and prepare a crypto object

Add an API by which users of the krb5 crypto library can get an allocated
and keyed crypto object.

For encryption-mode operation, an AEAD object is returned; for
checksum-mode operation, a synchronous hash object is returned.

Signed-off-by: David Howells <dhowells@redhat.com>
cc: Herbert Xu <herbert@gondor.apana.org.au>
cc: "David S. Miller" <davem@davemloft.net>
cc: Chuck Lever <chuck.lever@oracle.com>
cc: Marc Dionne <marc.dionne@auristor.com>
cc: Eric Dumazet <edumazet@google.com>
cc: Jakub Kicinski <kuba@kernel.org>
cc: Paolo Abeni <pabeni@redhat.com>
cc: Simon Horman <horms@kernel.org>
cc: linux-afs@lists.infradead.org
cc: linux-nfs@vger.kernel.org
cc: linux-crypto@vger.kernel.org
cc: netdev@vger.kernel.org

show more ...

crypto/krb5: Add an API to query the layout of the crypto section

Provide some functions to allow the called to find out about the layout of
the crypto section:

(1) Calculate, for a given size of

crypto/krb5: Add an API to query the layout of the crypto section

Provide some functions to allow the called to find out about the layout of
the crypto section:

(1) Calculate, for a given size of data, how big a buffer will be
required to hold it and where the data will be within it.

(2) Calculate, for an amount of buffer, what's the maximum size of data
that will fit therein, and where it will start.

(3) Determine where the data will be in a received message.

Signed-off-by: David Howells <dhowells@redhat.com>
cc: Herbert Xu <herbert@gondor.apana.org.au>
cc: "David S. Miller" <davem@davemloft.net>
cc: Chuck Lever <chuck.lever@oracle.com>
cc: Marc Dionne <marc.dionne@auristor.com>
cc: Eric Dumazet <edumazet@google.com>
cc: Jakub Kicinski <kuba@kernel.org>
cc: Paolo Abeni <pabeni@redhat.com>
cc: Simon Horman <horms@kernel.org>
cc: linux-afs@lists.infradead.org
cc: linux-nfs@vger.kernel.org
cc: linux-crypto@vger.kernel.org
cc: netdev@vger.kernel.org

show more ...