diff options
Diffstat (limited to 'sys/net/bpf.c')
| -rw-r--r-- | sys/net/bpf.c | 62 |
1 files changed, 62 insertions, 0 deletions
diff --git a/sys/net/bpf.c b/sys/net/bpf.c index 54dd184..5f2ef71 100644 --- a/sys/net/bpf.c +++ b/sys/net/bpf.c @@ -39,6 +39,7 @@ __FBSDID("$FreeBSD$"); #include "opt_bpf.h" #include "opt_compat.h" +#include "opt_ddb.h" #include "opt_netgraph.h" #include <sys/types.h> @@ -67,6 +68,10 @@ __FBSDID("$FreeBSD$"); #include <sys/socket.h> +#ifdef DDB +#include <ddb/ddb.h> +#endif + #include <net/if.h> #include <net/if_var.h> #include <net/if_dl.h> @@ -2569,6 +2574,32 @@ bpfattach2(struct ifnet *ifp, u_int dlt, u_int hdrlen, struct bpf_if **driverp) if_printf(ifp, "bpf attached\n"); } +#ifdef VIMAGE +/* + * When moving interfaces between vnet instances we need a way to + * query the dlt and hdrlen before detach so we can re-attch the if_bpf + * after the vmove. We unfortunately have no device driver infrastructure + * to query the interface for these values after creation/attach, thus + * add this as a workaround. + */ +int +bpf_get_bp_params(struct bpf_if *bp, u_int *bif_dlt, u_int *bif_hdrlen) +{ + + if (bp == NULL) + return (ENXIO); + if (bif_dlt == NULL && bif_hdrlen == NULL) + return (0); + + if (bif_dlt != NULL) + *bif_dlt = bp->bif_dlt; + if (bif_hdrlen != NULL) + *bif_hdrlen = bp->bif_hdrlen; + + return (0); +} +#endif + /* * Detach bpf from an interface. This involves detaching each descriptor * associated with the interface. Notify each descriptor as it's detached @@ -2977,3 +3008,34 @@ bpf_validate(const struct bpf_insn *f, int len) } #endif /* !DEV_BPF && !NETGRAPH_BPF */ + +#ifdef DDB +static void +bpf_show_bpf_if(struct bpf_if *bpf_if) +{ + + if (bpf_if == NULL) + return; + db_printf("%p:\n", bpf_if); +#define BPF_DB_PRINTF(f, e) db_printf(" %s = " f "\n", #e, bpf_if->e); + /* bif_ext.bif_next */ + /* bif_ext.bif_dlist */ + BPF_DB_PRINTF("%#x", bif_dlt); + BPF_DB_PRINTF("%u", bif_hdrlen); + BPF_DB_PRINTF("%p", bif_ifp); + /* bif_lock */ + /* bif_wlist */ + BPF_DB_PRINTF("%#x", bif_flags); +} + +DB_SHOW_COMMAND(bpf_if, db_show_bpf_if) +{ + + if (!have_addr) { + db_printf("usage: show bpf_if <struct bpf_if *>\n"); + return; + } + + bpf_show_bpf_if((struct bpf_if *)addr); +} +#endif |
