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| author | KP Singh <kpsingh@google.com> | 2020-08-25 21:29:17 +0300 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2020-08-26 01:00:04 +0300 |
| commit | 8ea636848aca35b9f97c5b5dee30225cf2dd0fe6 (patch) | |
| tree | fd26d1b828552b8e1e4dc53fe61e928cfeaf7f61 /security | |
| parent | 450af8d0f6be2e7dd2a528a3fb054bb726bf1747 (diff) | |
| download | linux-8ea636848aca35b9f97c5b5dee30225cf2dd0fe6.tar.xz | |
bpf: Implement bpf_local_storage for inodes
Similar to bpf_local_storage for sockets, add local storage for inodes.
The life-cycle of storage is managed with the life-cycle of the inode.
i.e. the storage is destroyed along with the owning inode.
The BPF LSM allocates an __rcu pointer to the bpf_local_storage in the
security blob which are now stackable and can co-exist with other LSMs.
Signed-off-by: KP Singh <kpsingh@google.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20200825182919.1118197-6-kpsingh@chromium.org
Diffstat (limited to 'security')
| -rw-r--r-- | security/bpf/hooks.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/security/bpf/hooks.c b/security/bpf/hooks.c index 32d32d485451..788667d582ae 100644 --- a/security/bpf/hooks.c +++ b/security/bpf/hooks.c @@ -11,6 +11,7 @@ static struct security_hook_list bpf_lsm_hooks[] __lsm_ro_after_init = { LSM_HOOK_INIT(NAME, bpf_lsm_##NAME), #include <linux/lsm_hook_defs.h> #undef LSM_HOOK + LSM_HOOK_INIT(inode_free_security, bpf_inode_storage_free), }; static int __init bpf_lsm_init(void) @@ -20,7 +21,12 @@ static int __init bpf_lsm_init(void) return 0; } +struct lsm_blob_sizes bpf_lsm_blob_sizes __lsm_ro_after_init = { + .lbs_inode = sizeof(struct bpf_storage_blob), +}; + DEFINE_LSM(bpf) = { .name = "bpf", .init = bpf_lsm_init, + .blobs = &bpf_lsm_blob_sizes }; |