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authorAlexei Starovoitov <ast@plumgrid.com>2014-07-30 20:34:16 -0700
committerDavid S. Miller <davem@davemloft.net>2014-08-02 15:03:58 -0700
commit7ae457c1e5b45a1b826fad9d62b32191d2bdcfdb (patch)
treedcb1aba57530e6c9426a81758173ca146ffafcaf /kernel/seccomp.c
parent8fb575ca396bc31d9fa99c26336e2432b41d1bfc (diff)
downloadlinux-7ae457c1e5b45a1b826fad9d62b32191d2bdcfdb.tar.bz2
net: filter: split 'struct sk_filter' into socket and bpf parts
clean up names related to socket filtering and bpf in the following way: - everything that deals with sockets keeps 'sk_*' prefix - everything that is pure BPF is changed to 'bpf_*' prefix split 'struct sk_filter' into struct sk_filter { atomic_t refcnt; struct rcu_head rcu; struct bpf_prog *prog; }; and struct bpf_prog { u32 jited:1, len:31; struct sock_fprog_kern *orig_prog; unsigned int (*bpf_func)(const struct sk_buff *skb, const struct bpf_insn *filter); union { struct sock_filter insns[0]; struct bpf_insn insnsi[0]; struct work_struct work; }; }; so that 'struct bpf_prog' can be used independent of sockets and cleans up 'unattached' bpf use cases split SK_RUN_FILTER macro into: SK_RUN_FILTER to be used with 'struct sk_filter *' and BPF_PROG_RUN to be used with 'struct bpf_prog *' __sk_filter_release(struct sk_filter *) gains __bpf_prog_release(struct bpf_prog *) helper function also perform related renames for the functions that work with 'struct bpf_prog *', since they're on the same lines: sk_filter_size -> bpf_prog_size sk_filter_select_runtime -> bpf_prog_select_runtime sk_filter_free -> bpf_prog_free sk_unattached_filter_create -> bpf_prog_create sk_unattached_filter_destroy -> bpf_prog_destroy sk_store_orig_filter -> bpf_prog_store_orig_filter sk_release_orig_filter -> bpf_release_orig_filter __sk_migrate_filter -> bpf_migrate_filter __sk_prepare_filter -> bpf_prepare_filter API for attaching classic BPF to a socket stays the same: sk_attach_filter(prog, struct sock *)/sk_detach_filter(struct sock *) and SK_RUN_FILTER(struct sk_filter *, ctx) to execute a program which is used by sockets, tun, af_packet API for 'unattached' BPF programs becomes: bpf_prog_create(struct bpf_prog **)/bpf_prog_destroy(struct bpf_prog *) and BPF_PROG_RUN(struct bpf_prog *, ctx) to execute a program which is used by isdn, ppp, team, seccomp, ptp, xt_bpf, cls_bpf, test_bpf Signed-off-by: Alexei Starovoitov <ast@plumgrid.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'kernel/seccomp.c')
-rw-r--r--kernel/seccomp.c10
1 files changed, 5 insertions, 5 deletions
diff --git a/kernel/seccomp.c b/kernel/seccomp.c
index 33a3a97e2b58..2f3fa2cc2eac 100644
--- a/kernel/seccomp.c
+++ b/kernel/seccomp.c
@@ -54,7 +54,7 @@
struct seccomp_filter {
atomic_t usage;
struct seccomp_filter *prev;
- struct sk_filter *prog;
+ struct bpf_prog *prog;
};
/* Limit any path through the tree to 256KB worth of instructions. */
@@ -187,7 +187,7 @@ static u32 seccomp_run_filters(int syscall)
* value always takes priority (ignoring the DATA).
*/
for (f = current->seccomp.filter; f; f = f->prev) {
- u32 cur_ret = SK_RUN_FILTER(f->prog, (void *)&sd);
+ u32 cur_ret = BPF_PROG_RUN(f->prog, (void *)&sd);
if ((cur_ret & SECCOMP_RET_ACTION) < (ret & SECCOMP_RET_ACTION))
ret = cur_ret;
@@ -260,7 +260,7 @@ static long seccomp_attach_filter(struct sock_fprog *fprog)
if (!filter)
goto free_prog;
- filter->prog = kzalloc(sk_filter_size(new_len),
+ filter->prog = kzalloc(bpf_prog_size(new_len),
GFP_KERNEL|__GFP_NOWARN);
if (!filter->prog)
goto free_filter;
@@ -273,7 +273,7 @@ static long seccomp_attach_filter(struct sock_fprog *fprog)
atomic_set(&filter->usage, 1);
filter->prog->len = new_len;
- sk_filter_select_runtime(filter->prog);
+ bpf_prog_select_runtime(filter->prog);
/*
* If there is an existing filter, make it the prev and don't drop its
@@ -337,7 +337,7 @@ void put_seccomp_filter(struct task_struct *tsk)
while (orig && atomic_dec_and_test(&orig->usage)) {
struct seccomp_filter *freeme = orig;
orig = orig->prev;
- sk_filter_free(freeme->prog);
+ bpf_prog_free(freeme->prog);
kfree(freeme);
}
}