2022-10-04 15:36:20

by Hans Schultz

Subject: [PATCH v2 iproute2-next 2/4] bridge: fdb: show locked FDB entries flag in output

Signed-off-by: Hans Schultz <[email protected]>
---
bridge/fdb.c | 11 +++++++++--
1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/bridge/fdb.c b/bridge/fdb.c
index 5f71bde0..f1f0a5bb 100644
--- a/bridge/fdb.c
+++ b/bridge/fdb.c
@@ -93,7 +93,7 @@ static int state_a2n(unsigned int *s, const char *arg)
return 0;
}

-static void fdb_print_flags(FILE *fp, unsigned int flags)
+static void fdb_print_flags(FILE *fp, unsigned int flags, __u8 ext_flags)
{
open_json_array(PRINT_JSON,
is_json_context() ? "flags" : "");
@@ -116,6 +116,9 @@ static void fdb_print_flags(FILE *fp, unsigned int flags)
if (flags & NTF_STICKY)
print_string(PRINT_ANY, NULL, "%s ", "sticky");

+ if (ext_flags & NTF_EXT_LOCKED)
+ print_string(PRINT_ANY, NULL, "%s ", "locked");
+
close_json_array(PRINT_JSON, NULL);
}

@@ -144,6 +147,7 @@ int print_fdb(struct nlmsghdr *n, void *arg)
struct ndmsg *r = NLMSG_DATA(n);
int len = n->nlmsg_len;
struct rtattr *tb[NDA_MAX+1];
+ __u32 ext_flags = 0;
__u16 vid = 0;

if (n->nlmsg_type != RTM_NEWNEIGH && n->nlmsg_type != RTM_DELNEIGH) {
@@ -170,6 +174,9 @@ int print_fdb(struct nlmsghdr *n, void *arg)
parse_rtattr(tb, NDA_MAX, NDA_RTA(r),
n->nlmsg_len - NLMSG_LENGTH(sizeof(*r)));

+ if (tb[NDA_FLAGS_EXT])
+ ext_flags = rta_getattr_u32(tb[NDA_FLAGS_EXT]);
+
if (tb[NDA_VLAN])
vid = rta_getattr_u16(tb[NDA_VLAN]);

@@ -266,7 +273,7 @@ int print_fdb(struct nlmsghdr *n, void *arg)
if (show_stats && tb[NDA_CACHEINFO])
fdb_print_stats(fp, RTA_DATA(tb[NDA_CACHEINFO]));

- fdb_print_flags(fp, r->ndm_flags);
+ fdb_print_flags(fp, r->ndm_flags, ext_flags);


if (tb[NDA_MASTER])
--
2.34.1

2022-10-13 09:22:09

by Ido Schimmel

Subject: Re: [PATCH v2 iproute2-next 2/4] bridge: fdb: show locked FDB entries flag in output

On Tue, Oct 04, 2022 at 05:20:34PM +0200, Hans Schultz wrote:
> Signed-off-by: Hans Schultz <[email protected]>

Don't leave the commit message empty. Explain the change and include an
example output showing the "locked" flag.

> ---
> bridge/fdb.c | 11 +++++++++--

Still missing a description of the "locked" flag from the man page.
Something like:

"
locked - this entry was added by the kernel in response to a host trying
to communicate behind a bridge port with MAB enabled. User space can
authenticate the host by clearing the flag. The flag cannot be set by
user space.
"

> 1 file changed, 9 insertions(+), 2 deletions(-)
>
> diff --git a/bridge/fdb.c b/bridge/fdb.c
> index 5f71bde0..f1f0a5bb 100644
> --- a/bridge/fdb.c
> +++ b/bridge/fdb.c
> @@ -93,7 +93,7 @@ static int state_a2n(unsigned int *s, const char *arg)
> return 0;
> }
>
> -static void fdb_print_flags(FILE *fp, unsigned int flags)
> +static void fdb_print_flags(FILE *fp, unsigned int flags, __u8 ext_flags)

s/__u8/__u32/

> {
> open_json_array(PRINT_JSON,
> is_json_context() ? "flags" : "");
> @@ -116,6 +116,9 @@ static void fdb_print_flags(FILE *fp, unsigned int flags)
> if (flags & NTF_STICKY)
> print_string(PRINT_ANY, NULL, "%s ", "sticky");
>
> + if (ext_flags & NTF_EXT_LOCKED)
> + print_string(PRINT_ANY, NULL, "%s ", "locked");
> +
> close_json_array(PRINT_JSON, NULL);
> }
>
> @@ -144,6 +147,7 @@ int print_fdb(struct nlmsghdr *n, void *arg)
> struct ndmsg *r = NLMSG_DATA(n);
> int len = n->nlmsg_len;
> struct rtattr *tb[NDA_MAX+1];
> + __u32 ext_flags = 0;
> __u16 vid = 0;
>
> if (n->nlmsg_type != RTM_NEWNEIGH && n->nlmsg_type != RTM_DELNEIGH) {
> @@ -170,6 +174,9 @@ int print_fdb(struct nlmsghdr *n, void *arg)
> parse_rtattr(tb, NDA_MAX, NDA_RTA(r),
> n->nlmsg_len - NLMSG_LENGTH(sizeof(*r)));
>
> + if (tb[NDA_FLAGS_EXT])
> + ext_flags = rta_getattr_u32(tb[NDA_FLAGS_EXT]);
> +
> if (tb[NDA_VLAN])
> vid = rta_getattr_u16(tb[NDA_VLAN]);
>
> @@ -266,7 +273,7 @@ int print_fdb(struct nlmsghdr *n, void *arg)
> if (show_stats && tb[NDA_CACHEINFO])
> fdb_print_stats(fp, RTA_DATA(tb[NDA_CACHEINFO]));
>
> - fdb_print_flags(fp, r->ndm_flags);
> + fdb_print_flags(fp, r->ndm_flags, ext_flags);
>
>
> if (tb[NDA_MASTER])
> --
> 2.34.1
>