bpf: tidy up internals of bpf key handling #9352
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added 3 commits
July 24, 2025 07:47
Since the only consumers of struct bpf_key are bpf scripts which call the bpf kfuncs which take struct bpf_key, only the implementing functions in bpf_trace.c should be reaching inside this structure. Enforce this by making the structure opaque in the header with a body that's only defined inside bpf_trace.c Signed-off-by: James Bottomley <[email protected]>
bpf_key.has_ref is used to distinguish between real key pointers and the fake key pointers that are used for system keyrings (to ensure the actual pointers to system keyrings are never visible outside certs/system_keyring.c). The keyrings subsystem has an exported function to do this, so use that in the bpf keyring code eliminating the need to store has_ref. Signed-off-by: James Bottomley <[email protected]>
Now that struct bpf_key is an opaque structure only containing a pointer to the key, make it an alias for the key itself and thus eliminate the need to allocate and free the container. Signed-off-by: James Bottomley <[email protected]>
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Upstream branch: 95993dc |
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At least one diff in series https://patchwork.kernel.org/project/netdevbpf/list/?series=985613 expired. Closing PR. |
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Pull request for series with
subject: bpf: tidy up internals of bpf key handling
version: 1
url: https://patchwork.kernel.org/project/netdevbpf/list/?series=985613