From: KP Singh <kpsingh@kernel.org>
To: bpf@vger.kernel.org
Cc: Alexei Starovoitov <ast@kernel.org>,
Daniel Borkmann <daniel@iogearbox.net>,
Andrii Nakryiko <andrii@kernel.org>,
"Paul E. McKenney" <paulmck@kernel.org>,
Martin KaFai Lau <kafai@fb.com>
Subject: [PATCH v3 bpf-next 0/2] Sleepable local storage
Date: Fri, 24 Dec 2021 15:29:14 +0000 [thread overview]
Message-ID: <20211224152916.1550677-1-kpsingh@kernel.org> (raw)
Local storage is currently unusable in sleepable helpers. One of the
important use cases of local_storage is to attach security (or
performance) contextual information to kernel objects in LSM / tracing
programs to be used later in the life-cyle of the object.
Sometimes this context can only be gathered from sleepable programs
(because it needs accesing __user pointers or helpers like
bpf_ima_inode_hash). Allowing local storage to be used from sleepable
programs allows such context to be managed with the benefits of
local_storage.
# v2 -> v3
* Fixed some RCU issues pointed by Martin
* Added Martin's ack
# v1 -> v2
* Generalize RCU checks (will send a separate patch for updating
non local storage code where this can be used).
* Add missing RCU lock checks from v1
KP Singh (2):
bpf: Allow bpf_local_storage to be used by sleepable programs
bpf/selftests: Update local storage selftest for sleepable programs
include/linux/bpf_local_storage.h | 5 ++
kernel/bpf/bpf_inode_storage.c | 6 ++-
kernel/bpf/bpf_local_storage.c | 50 ++++++++++++++-----
kernel/bpf/bpf_task_storage.c | 6 ++-
kernel/bpf/verifier.c | 3 ++
net/core/bpf_sk_storage.c | 8 ++-
.../bpf/prog_tests/test_local_storage.c | 20 +++-----
.../selftests/bpf/progs/local_storage.c | 24 ++-------
8 files changed, 73 insertions(+), 49 deletions(-)
--
2.34.1.448.ga2b2bfdf31-goog
next reply other threads:[~2021-12-24 15:29 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-12-24 15:29 KP Singh [this message]
2021-12-24 15:29 ` [PATCH v3 bpf-next 1/2] bpf: Allow bpf_local_storage to be used by sleepable programs KP Singh
2021-12-28 23:58 ` Martin KaFai Lau
2021-12-24 15:29 ` [PATCH v3 bpf-next 2/2] bpf/selftests: Update local storage selftest for " KP Singh
2021-12-30 2:02 ` [PATCH v3 bpf-next 0/2] Sleepable local storage Alexei Starovoitov
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