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Fix vector raw inintialization logic

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Vector RAW in UML needs to BPF filter its own MAC only
if QDISC_BYPASS has failed. If QDISC_BYPASS is successful, the
frames originated locally are not visible to readers on the
raw socket.

Signed-off-by: Anton Ivanov <anton.ivanov@cambridgegreys.com>
Signed-off-by: Richard Weinberger <richard@nod.at>
This commit is contained in:
Anton Ivanov
2018-03-05 13:29:05 +00:00
committed by Richard Weinberger
parent ce471fdbc6
commit e40238dedb
4 changed files with 21 additions and 10 deletions
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22
arch/um/drivers/vector_user.c
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@@ -41,7 +41,6 @@
#define TRANS_RAW "raw"
#define TRANS_RAW_LEN strlen(TRANS_RAW)
#define QDISC_FAIL "user_init_raw: could not disable qdisc on interface"
#define VNET_HDR_FAIL "could not enable vnet headers on fd %d"
#define TUN_GET_F_FAIL "tapraw: TUNGETFEATURES failed: %s"
#define L2TPV3_BIND_FAIL "l2tpv3_open : could not bind socket err=%i"
@@ -212,8 +211,6 @@ static struct vector_fds *user_init_raw_fds(struct arglist *ifspec)
int err = -ENOMEM;
char *iface;
struct vector_fds *result = NULL;
int optval = 1;
iface = uml_vector_fetch_arg(ifspec, TOKEN_IFNAME);
if (iface == NULL)
@@ -256,12 +253,6 @@ static struct vector_fds *user_init_raw_fds(struct arglist *ifspec)
goto cleanup;
}
if (setsockopt(txfd,
SOL_PACKET, PACKET_QDISC_BYPASS,
&optval, sizeof(optval)) != 0) {
printk(UM_KERN_INFO QDISC_FAIL);
}
result = uml_kmalloc(sizeof(struct vector_fds), UM_GFP_KERNEL);
if (result != NULL) {
result->rx_fd = rxfd;
@@ -281,6 +272,19 @@ cleanup:
return NULL;
}
bool uml_raw_enable_qdisc_bypass(int fd)
{
int optval = 1;
if (setsockopt(fd,
SOL_PACKET, PACKET_QDISC_BYPASS,
&optval, sizeof(optval)) != 0) {
return false;
}
return true;
}
bool uml_raw_enable_vnet_headers(int fd)
{
int optval = 1;