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>
diff --git a/lib/test_bpf.c b/lib/test_bpf.c
index 5f48623..89e0345 100644
--- a/lib/test_bpf.c
+++ b/lib/test_bpf.c
@@ -1761,9 +1761,9 @@
return len + 1;
}
-static struct sk_filter *generate_filter(int which, int *err)
+static struct bpf_prog *generate_filter(int which, int *err)
{
- struct sk_filter *fp;
+ struct bpf_prog *fp;
struct sock_fprog_kern fprog;
unsigned int flen = probe_filter_length(tests[which].u.insns);
__u8 test_type = tests[which].aux & TEST_TYPE_MASK;
@@ -1773,7 +1773,7 @@
fprog.filter = tests[which].u.insns;
fprog.len = flen;
- *err = sk_unattached_filter_create(&fp, &fprog);
+ *err = bpf_prog_create(&fp, &fprog);
if (tests[which].aux & FLAG_EXPECTED_FAIL) {
if (*err == -EINVAL) {
pr_cont("PASS\n");
@@ -1798,7 +1798,7 @@
break;
case INTERNAL:
- fp = kzalloc(sk_filter_size(flen), GFP_KERNEL);
+ fp = kzalloc(bpf_prog_size(flen), GFP_KERNEL);
if (fp == NULL) {
pr_cont("UNEXPECTED_FAIL no memory left\n");
*err = -ENOMEM;
@@ -1809,7 +1809,7 @@
memcpy(fp->insnsi, tests[which].u.insns_int,
fp->len * sizeof(struct bpf_insn));
- sk_filter_select_runtime(fp);
+ bpf_prog_select_runtime(fp);
break;
}
@@ -1817,21 +1817,21 @@
return fp;
}
-static void release_filter(struct sk_filter *fp, int which)
+static void release_filter(struct bpf_prog *fp, int which)
{
__u8 test_type = tests[which].aux & TEST_TYPE_MASK;
switch (test_type) {
case CLASSIC:
- sk_unattached_filter_destroy(fp);
+ bpf_prog_destroy(fp);
break;
case INTERNAL:
- sk_filter_free(fp);
+ bpf_prog_free(fp);
break;
}
}
-static int __run_one(const struct sk_filter *fp, const void *data,
+static int __run_one(const struct bpf_prog *fp, const void *data,
int runs, u64 *duration)
{
u64 start, finish;
@@ -1840,7 +1840,7 @@
start = ktime_to_us(ktime_get());
for (i = 0; i < runs; i++)
- ret = SK_RUN_FILTER(fp, data);
+ ret = BPF_PROG_RUN(fp, data);
finish = ktime_to_us(ktime_get());
@@ -1850,7 +1850,7 @@
return ret;
}
-static int run_one(const struct sk_filter *fp, struct bpf_test *test)
+static int run_one(const struct bpf_prog *fp, struct bpf_test *test)
{
int err_cnt = 0, i, runs = MAX_TESTRUNS;
@@ -1884,7 +1884,7 @@
int i, err_cnt = 0, pass_cnt = 0;
for (i = 0; i < ARRAY_SIZE(tests); i++) {
- struct sk_filter *fp;
+ struct bpf_prog *fp;
int err;
pr_info("#%d %s ", i, tests[i].descr);