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Message-ID: <20241112083700.356299-1-song@kernel.org>
Date: Tue, 12 Nov 2024 00:36:56 -0800
From: Song Liu <song@...nel.org>
To: bpf@...r.kernel.org,
linux-fsdevel@...r.kernel.org,
linux-kernel@...r.kernel.org,
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Song Liu <song@...nel.org>
Subject: [PATCH v2 bpf-next 0/4] Make inode storage available to tracing prog
bpf inode local storage can be useful beyond LSM programs. For example,
bcc/libbpf-tools file* can use inode local storage to simplify the logic.
This set makes inode local storage available to tracing program.
1/4 is missing change for bpf task local storage. 2/4 move inode local
storage from security blob to inode.
Similar to task local storage in tracing program, it is necessary to add
recursion prevention logic for inode local storage. Patch 3/4 adds such
logic, and 4/4 add a test for the recursion prevention logic.
Changes v1 => v2:
1. Rebase.
2. Fix send-email mistake.
Song Liu (4):
bpf: lsm: Remove hook to bpf_task_storage_free
bpf: Make bpf inode storage available to tracing program
bpf: Add recursion prevention logic for inode storage
selftest/bpf: Test inode local storage recursion prevention
fs/inode.c | 1 +
include/linux/bpf.h | 9 +
include/linux/bpf_lsm.h | 29 ---
include/linux/fs.h | 4 +
kernel/bpf/Makefile | 3 +-
kernel/bpf/bpf_inode_storage.c | 185 +++++++++++++-----
kernel/bpf/bpf_lsm.c | 4 -
kernel/trace/bpf_trace.c | 8 +
security/bpf/hooks.c | 7 -
tools/testing/selftests/bpf/DENYLIST.s390x | 1 +
.../bpf/prog_tests/inode_local_storage.c | 72 +++++++
.../bpf/progs/inode_storage_recursion.c | 90 +++++++++
12 files changed, 320 insertions(+), 93 deletions(-)
create mode 100644 tools/testing/selftests/bpf/prog_tests/inode_local_storage.c
create mode 100644 tools/testing/selftests/bpf/progs/inode_storage_recursion.c
--
2.43.5
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