diff options
Diffstat (limited to 'arch/um/drivers/vector_user.c')
| -rw-r--r-- | arch/um/drivers/vector_user.c | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/arch/um/drivers/vector_user.c b/arch/um/drivers/vector_user.c index b16a5e5619d3..2ea67e6fd067 100644 --- a/arch/um/drivers/vector_user.c +++ b/arch/um/drivers/vector_user.c @@ -46,6 +46,9 @@ #define TRANS_FD "fd" #define TRANS_FD_LEN strlen(TRANS_FD) +#define TRANS_VDE "vde" +#define TRANS_VDE_LEN strlen(TRANS_VDE) + #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" @@ -434,6 +437,84 @@ fd_cleanup: return NULL; } +/* enough char to store an int type */ +#define ENOUGH(type) ((CHAR_BIT * sizeof(type) - 1) / 3 + 2) +#define ENOUGH_OCTAL(type) ((CHAR_BIT * sizeof(type) + 2) / 3) +/* vde_plug --descr xx --port2 xx --mod2 xx --group2 xx seqpacket://NN vnl (NULL) */ +#define VDE_MAX_ARGC 12 +#define VDE_SEQPACKET_HEAD "seqpacket://" +#define VDE_SEQPACKET_HEAD_LEN (sizeof(VDE_SEQPACKET_HEAD) - 1) +#define VDE_DEFAULT_DESCRIPTION "UML" + +static struct vector_fds *user_init_vde_fds(struct arglist *ifspec) +{ + char seqpacketvnl[VDE_SEQPACKET_HEAD_LEN + ENOUGH(int) + 1]; + char *argv[VDE_MAX_ARGC] = {"vde_plug"}; + int argc = 1; + int rv; + int sv[2]; + struct vector_fds *result = NULL; + + char *vnl = uml_vector_fetch_arg(ifspec,"vnl"); + char *descr = uml_vector_fetch_arg(ifspec,"descr"); + char *port = uml_vector_fetch_arg(ifspec,"port"); + char *mode = uml_vector_fetch_arg(ifspec,"mode"); + char *group = uml_vector_fetch_arg(ifspec,"group"); + if (descr == NULL) descr = VDE_DEFAULT_DESCRIPTION; + + argv[argc++] = "--descr"; + argv[argc++] = descr; + if (port != NULL) { + argv[argc++] = "--port2"; + argv[argc++] = port; + } + if (mode != NULL) { + argv[argc++] = "--mod2"; + argv[argc++] = mode; + } + if (group != NULL) { + argv[argc++] = "--group2"; + argv[argc++] = group; + } + argv[argc++] = seqpacketvnl; + argv[argc++] = vnl; + argv[argc++] = NULL; + + rv = socketpair(AF_UNIX, SOCK_SEQPACKET, 0, sv); + if (rv < 0) { + printk(UM_KERN_ERR "vde: seqpacket socketpair err %d", -errno); + return NULL; + } + rv = os_set_exec_close(sv[0]); + if (rv < 0) { + printk(UM_KERN_ERR "vde: seqpacket socketpair cloexec err %d", -errno); + goto vde_cleanup_sv; + } + snprintf(seqpacketvnl, sizeof(seqpacketvnl), VDE_SEQPACKET_HEAD "%d", sv[1]); + + run_helper(NULL, NULL, argv); + + close(sv[1]); + + result = uml_kmalloc(sizeof(struct vector_fds), UM_GFP_KERNEL); + if (result == NULL) { + printk(UM_KERN_ERR "fd open: allocation failed"); + goto vde_cleanup; + } + + result->rx_fd = sv[0]; + result->tx_fd = sv[0]; + result->remote_addr_size = 0; + result->remote_addr = NULL; + return result; + +vde_cleanup_sv: + close(sv[1]); +vde_cleanup: + close(sv[0]); + return NULL; +} + static struct vector_fds *user_init_raw_fds(struct arglist *ifspec) { int rxfd = -1, txfd = -1; @@ -673,6 +754,8 @@ struct vector_fds *uml_vector_user_open( return user_init_unix_fds(parsed, ID_BESS); if (strncmp(transport, TRANS_FD, TRANS_FD_LEN) == 0) return user_init_fd_fds(parsed); + if (strncmp(transport, TRANS_VDE, TRANS_VDE_LEN) == 0) + return user_init_vde_fds(parsed); return NULL; } |