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Maciej Fijalkowski e1b204ec59 ice: allow hot-swapping XDP programs 
[ Upstream commit 469748429a ]

Currently ice driver's .ndo_bpf callback brings interface down and up
independently of XDP resources' presence. This is only needed when
either these resources have to be configured or removed. It means that
if one is switching XDP programs on-the-fly with running traffic,
packets will be dropped.

To avoid this, compare early on ice_xdp_setup_prog() state of incoming
bpf_prog pointer vs the bpf_prog pointer that is already assigned to
VSI. Do the swap in case VSI has bpf_prog and incoming one are non-NULL.

Lastly, while at it, put old bpf_prog *after* the update of Rx ring's
bpf_prog pointer. In theory previous code could expose us to a state
where Rx ring's bpf_prog would still be referring to old_prog that got
released with earlier bpf_prog_put().

Signed-off-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com>
Acked-by: Toke Høiland-Jørgensen <toke@redhat.com>
Reviewed-by: Alexander Lobakin <aleksander.lobakin@intel.com>
Tested-by: Chandan Kumar Rout <chandanx.rout@intel.com> (A Contingent Worker at Intel)
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Stable-dep-of: 04c7e14e5b ("ice: do not bring the VSI up, if it was down before the XDP setup")
Signed-off-by: Sasha Levin <sashal@kernel.org>
History 2024-09-12 11:10:22 +02:00
arch x86/kmsan: Fix hook for unaligned accesses 2024-09-12 11:10:19 +02:00
block block: remove the blk_flush_integrity call in blk_integrity_unregister 2024-09-08 07:53:11 +02:00
certs certs: Fix build error when PKCS#11 URI contains semicolon 2023-02-09 11:28:11 +01:00
crypto crypto: aead,cipher - zeroize key buffer after use 2024-07-11 12:47:05 +02:00
Documentation hwspinlock: Introduce hwspin_lock_bust() 2024-09-08 07:53:09 +02:00
drivers ice: allow hot-swapping XDP programs 2024-09-12 11:10:22 +02:00
fs cifs: Fix FALLOC_FL_ZERO_RANGE to preflush buffered part of target region 2024-09-12 11:10:21 +02:00
include regulator: core: Stub devm_regulator_bulk_get_const() if !CONFIG_REGULATOR 2024-09-12 11:10:21 +02:00
init rust: fix the default format for CONFIG_{RUSTC,BINDGEN}_VERSION_TEXT 2024-08-29 17:30:32 +02:00
io_uring io_uring: fix io_match_task must_hold 2024-08-03 08:49:53 +02:00
ipc sysctl: treewide: drop unused argument ctl_table_root::set_ownership(table) 2024-08-11 12:35:51 +02:00
kernel tracing: Avoid possible softlockup in tracing_iter_reset() 2024-09-12 11:10:18 +02:00
lib bitmap: introduce generic optimized bitmap_size() 2024-08-29 17:30:14 +02:00
LICENSES LICENSES/LGPL-2.1: Add LGPL-2.1-or-later as valid identifiers 2021-12-16 14:33:10 +01:00
mm x86/kaslr: Expose and use the end of the physical memory address space 2024-09-12 11:10:17 +02:00
net can: bcm: Remove proc entry when dev is unregistered. 2024-09-12 11:10:21 +02:00
rust rust: kbuild: fix export of bss symbols 2024-09-12 11:10:21 +02:00
samples bpf: Replace bpf_lpm_trie_key 0-length array with flexible array 2024-08-29 17:30:22 +02:00
scripts rust: work around bindgen 0.69.0 issue 2024-08-29 17:30:32 +02:00
security smack: unix sockets: fix accept()ed socket label 2024-09-12 11:10:19 +02:00
sound ALSA: hda: Add input value sanity checks to HDMI channel map controls 2024-09-12 11:10:19 +02:00
tools selftests: mptcp: join: cannot rm sf if closed 2024-09-08 07:53:03 +02:00
usr usr/gen_init_cpio.c: remove unnecessary -1 values from int file 2022-10-03 14:21:44 -07:00
virt KVM: Fix a data race on last_boosted_vcpu in kvm_vcpu_on_spin() 2024-06-27 13:46:21 +02:00
.clang-format inet: ping: use hlist_nulls rcu iterator during lookup 2022-12-01 12:42:46 +01:00
.cocciconfig scripts: add Linux .cocciconfig for coccinelle 2016-07-22 12:13:39 +02:00
.get_maintainer.ignore get_maintainer: add Alan to .get_maintainer.ignore 2022-08-20 15:17:44 -07:00
.gitattributes .gitattributes: use 'dts' diff driver for dts files 2019-12-04 19:44:11 -08:00
.gitignore Kbuild: add Rust support 2022-09-28 09:02:20 +02:00
.mailmap 9 hotfixes. 6 for MM, 3 for other areas. Four of these patches address 2022-12-10 17:10:52 -08:00
.rustfmt.toml rust: add .rustfmt.toml 2022-09-28 09:02:20 +02:00
COPYING COPYING: state that all contributions really are covered by this file 2020-02-10 13:32:20 -08:00
CREDITS MAINTAINERS: Remove Michal Marek from Kbuild maintainers 2022-11-16 14:53:00 +09:00
Kbuild Kbuild updates for v6.1 2022-10-10 12:00:45 -07:00
Kconfig kbuild: ensure full rebuild when the compiler is updated 2020-05-12 13:28:33 +09:00
MAINTAINERS MAINTAINERS: add leah to 6.1 MAINTAINERS file 2024-05-17 11:56:16 +02:00
Makefile Linux 6.1.109 2024-09-08 07:53:13 +02:00
README Drop all 00-INDEX files from Documentation/ 2018-09-09 15:08:58 -06:00

README 

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.