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| author | Daniel Borkmann <daniel@iogearbox.net> | 2025-07-31 01:47:30 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-09-09 18:58:01 +0200 |
| commit | 963e79f6bdac506023d35b3c14a2d8c15348a381 (patch) | |
| tree | c6d67b65aeed10e41a0703cf1c1b7dbd65832682 /include | |
| parent | b0c51e95f54e5f4e13a7ada6629125b0bc427a96 (diff) | |
| download | linux-963e79f6bdac506023d35b3c14a2d8c15348a381.tar.gz linux-963e79f6bdac506023d35b3c14a2d8c15348a381.tar.bz2 linux-963e79f6bdac506023d35b3c14a2d8c15348a381.zip | |
bpf: Add cookie object to bpf maps
[ Upstream commit 12df58ad294253ac1d8df0c9bb9cf726397a671d ]
Add a cookie to BPF maps to uniquely identify BPF maps for the timespan
when the node is up. This is different to comparing a pointer or BPF map
id which could get rolled over and reused.
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/r/20250730234733.530041-1-daniel@iogearbox.net
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/bpf.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/bpf.h b/include/linux/bpf.h index 1150a595aa54..fcf48bd74600 100644 --- a/include/linux/bpf.h +++ b/include/linux/bpf.h @@ -306,6 +306,7 @@ struct bpf_map { bool free_after_rcu_gp; atomic64_t sleepable_refcnt; s64 __percpu *elem_count; + u64 cookie; /* write-once */ }; static inline const char *btf_field_type_name(enum btf_field_type type) |