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net: filter: rename sk_chk_filter() -> bpf_check_classic()

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trivial rename to indicate that this functions performs classic BPF checking

Signed-off-by: Alexei Starovoitov <ast@plumgrid.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Alexei Starovoitov 2014-07-30 20:34:14 -07:00 committed by David S. Miller
parent 009937e78a
commit 4df95ff488
5 changed files with 10 additions and 10 deletions
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2
Documentation/networking/filter.txt
View File

@ -591,7 +591,7 @@ sk_unattached_filter_destroy() for destroying it. The macro
SK_RUN_FILTER(filter, ctx) transparently invokes eBPF interpreter or JITed
code to run the filter. 'filter' is a pointer to struct sk_filter that we
got from sk_unattached_filter_create(), and 'ctx' the given context (e.g.
skb pointer). All constraints and restrictions from sk_chk_filter() apply
skb pointer). All constraints and restrictions from bpf_check_classic() apply
before a conversion to the new layout is being done behind the scenes!
Currently, the classic BPF format is being used for JITing on most of the

2
include/linux/filter.h
View File

@ -361,7 +361,7 @@ void sk_unattached_filter_destroy(struct sk_filter *fp);
int sk_attach_filter(struct sock_fprog *fprog, struct sock *sk);
int sk_detach_filter(struct sock *sk);
int sk_chk_filter(const struct sock_filter *filter, unsigned int flen);
int bpf_check_classic(const struct sock_filter *filter, unsigned int flen);
int sk_get_filter(struct sock *sk, struct sock_filter __user *filter,
unsigned int len);

2
kernel/bpf/core.c
View File

@ -18,7 +18,7 @@
* 2 of the License, or (at your option) any later version.
*
* Andi Kleen - Fix a few bad bugs and races.
* Kris Katterjohn - Added many additional checks in sk_chk_filter()
* Kris Katterjohn - Added many additional checks in bpf_check_classic()
*/
#include <linux/filter.h>
#include <linux/skbuff.h>

4
kernel/seccomp.c
View File

@ -87,7 +87,7 @@ static void populate_seccomp_data(struct seccomp_data *sd)
* @filter: filter to verify
* @flen: length of filter
*
* Takes a previously checked filter (by sk_chk_filter) and
* Takes a previously checked filter (by bpf_check_classic) and
* redirects all filter code that loads struct sk_buff data
* and related data through seccomp_bpf_load. It also
* enforces length and alignment checking of those loads.
@ -239,7 +239,7 @@ static long seccomp_attach_filter(struct sock_fprog *fprog)
goto free_prog;
/* Check and rewrite the fprog via the skb checker */
ret = sk_chk_filter(fp, fprog->len);
ret = bpf_check_classic(fp, fprog->len);
if (ret)
goto free_prog;

10
net/core/filter.c
View File

@ -18,7 +18,7 @@
* 2 of the License, or (at your option) any later version.
*
* Andi Kleen - Fix a few bad bugs and races.
* Kris Katterjohn - Added many additional checks in sk_chk_filter()
* Kris Katterjohn - Added many additional checks in bpf_check_classic()
*/
#include <linux/module.h>
@ -721,7 +721,7 @@ static bool chk_code_allowed(u16 code_to_probe)
}
/**
* sk_chk_filter - verify socket filter code
* bpf_check_classic - verify socket filter code
* @filter: filter to verify
* @flen: length of filter
*
@ -734,7 +734,7 @@ static bool chk_code_allowed(u16 code_to_probe)
*
* Returns 0 if the rule set is legal or -EINVAL if not.
*/
int sk_chk_filter(const struct sock_filter *filter, unsigned int flen)
int bpf_check_classic(const struct sock_filter *filter, unsigned int flen)
{
bool anc_found;
int pc;
@ -808,7 +808,7 @@ int sk_chk_filter(const struct sock_filter *filter, unsigned int flen)
return -EINVAL;
}
EXPORT_SYMBOL(sk_chk_filter);
EXPORT_SYMBOL(bpf_check_classic);
static int sk_store_orig_filter(struct sk_filter *fp,
const struct sock_fprog *fprog)
@ -968,7 +968,7 @@ static struct sk_filter *__sk_prepare_filter(struct sk_filter *fp)
fp->bpf_func = NULL;
fp->jited = 0;
err = sk_chk_filter(fp->insns, fp->len);
err = bpf_check_classic(fp->insns, fp->len);
if (err) {
__sk_filter_release(fp);
return ERR_PTR(err);