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authorKP Singh <kpsingh@google.com>2020-08-25 20:29:17 +0200
committerAlexei Starovoitov <ast@kernel.org>2020-08-25 15:00:04 -0700
commit8ea636848aca35b9f97c5b5dee30225cf2dd0fe6 (patch)
treefd26d1b828552b8e1e4dc53fe61e928cfeaf7f61 /security/bpf/hooks.c
parent450af8d0f6be2e7dd2a528a3fb054bb726bf1747 (diff)
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/bpf/hooks.c')
-rw-r--r--security/bpf/hooks.c6
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
};