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| author | Daniel Borkmann <daniel@iogearbox.net> | 2025-07-31 02:47:30 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-09-09 19:56:18 +0300 |
| commit | 3eeefeb9d62d3f35871eb74810a526b89652dadf (patch) | |
| tree | 5138d1ad9ecf0075b6a8f9934312831cb7d198e9 /include/linux | |
| parent | 355bd0b51d2fc0a2c9d0789c77269e4476637428 (diff) | |
| download | linux-3eeefeb9d62d3f35871eb74810a526b89652dadf.tar.xz | |
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/linux')
| -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 17de12a98f85..0a097087f0a7 100644 --- a/include/linux/bpf.h +++ b/include/linux/bpf.h @@ -300,6 +300,7 @@ 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) |