Hi Pauli, On Tue, Apr 29, 2025 at 10:29 AM Pauli Virtanen <pav@xxxxxx> wrote: > > ti, 2025-04-29 kello 17:26 +0300, Pauli Virtanen kirjoitti: > > Hi, > > > > ti, 2025-04-29 kello 11:35 +0800, Yang Li via B4 Relay kirjoitti: > > > From: Yang Li <yang.li@xxxxxxxxxxx> > > > > > > Application layer programs (like pipewire) need to use > > > iso timestamp information for audio synchronization. > > > > I think the timestamp should be put into CMSG, same ways as packet > > status is. The packet body should then always contain only the payload. > > Or, this maybe should instead use the SOF_TIMESTAMPING_RX_HARDWARE > mechanism, which would avoid adding a new API. Either that or we use BT_PKT_STATUS, does SOF_TIMESTAMPING_RX_HARDWARE requires the use of errqueue? > > > > > > Signed-off-by: Yang Li <yang.li@xxxxxxxxxxx> > > > --- > > > include/net/bluetooth/bluetooth.h | 4 ++- > > > net/bluetooth/iso.c | 58 +++++++++++++++++++++++++++++++++------ > > > 2 files changed, 52 insertions(+), 10 deletions(-) > > > > > > diff --git a/include/net/bluetooth/bluetooth.h b/include/net/bluetooth/bluetooth.h > > > index bbefde319f95..a102bd76647c 100644 > > > --- a/include/net/bluetooth/bluetooth.h > > > +++ b/include/net/bluetooth/bluetooth.h > > > @@ -242,6 +242,7 @@ struct bt_codecs { > > > #define BT_CODEC_MSBC 0x05 > > > > > > #define BT_ISO_BASE 20 > > > +#define BT_ISO_TS 21 > > > > > > __printf(1, 2) > > > void bt_info(const char *fmt, ...); > > > @@ -390,7 +391,8 @@ struct bt_sock { > > > enum { > > > BT_SK_DEFER_SETUP, > > > BT_SK_SUSPEND, > > > - BT_SK_PKT_STATUS > > > + BT_SK_PKT_STATUS, > > > + BT_SK_ISO_TS > > > }; > > > > > > struct bt_sock_list { > > > diff --git a/net/bluetooth/iso.c b/net/bluetooth/iso.c > > > index 2f348f48e99d..2c1fdea4b8c1 100644 > > > --- a/net/bluetooth/iso.c > > > +++ b/net/bluetooth/iso.c > > > @@ -1718,7 +1718,21 @@ static int iso_sock_setsockopt(struct socket *sock, int level, int optname, > > > iso_pi(sk)->base_len = optlen; > > > > > > break; > > > + case BT_ISO_TS: > > > + if (optlen != sizeof(opt)) { > > > + err = -EINVAL; > > > + break; > > > + } > > > > > > + err = copy_safe_from_sockptr(&opt, sizeof(opt), optval, optlen); > > > + if (err) > > > + break; > > > + > > > + if (opt) > > > + set_bit(BT_SK_ISO_TS, &bt_sk(sk)->flags); > > > + else > > > + clear_bit(BT_SK_ISO_TS, &bt_sk(sk)->flags); > > > + break; > > > default: > > > err = -ENOPROTOOPT; > > > break; > > > @@ -1789,7 +1803,16 @@ static int iso_sock_getsockopt(struct socket *sock, int level, int optname, > > > err = -EFAULT; > > > > > > break; > > > + case BT_ISO_TS: > > > + if (len < sizeof(u32)) { > > > + err = -EINVAL; > > > + break; > > > + } > > > > > > + if (put_user(test_bit(BT_SK_ISO_TS, &bt_sk(sk)->flags), > > > + (u32 __user *)optval)) > > > + err = -EFAULT; > > > + break; > > > default: > > > err = -ENOPROTOOPT; > > > break; > > > @@ -2271,13 +2294,21 @@ static void iso_disconn_cfm(struct hci_conn *hcon, __u8 reason) > > > void iso_recv(struct hci_conn *hcon, struct sk_buff *skb, u16 flags) > > > { > > > struct iso_conn *conn = hcon->iso_data; > > > + struct sock *sk; > > > __u16 pb, ts, len; > > > > > > if (!conn) > > > goto drop; > > > > > > - pb = hci_iso_flags_pb(flags); > > > - ts = hci_iso_flags_ts(flags); > > > + iso_conn_lock(conn); > > > + sk = conn->sk; > > > + iso_conn_unlock(conn); > > > + > > > + if (!sk) > > > + goto drop; > > > + > > > + pb = hci_iso_flags_pb(flags); > > > + ts = hci_iso_flags_ts(flags); > > > > > > BT_DBG("conn %p len %d pb 0x%x ts 0x%x", conn, skb->len, pb, ts); > > > > > > @@ -2294,17 +2325,26 @@ void iso_recv(struct hci_conn *hcon, struct sk_buff *skb, u16 flags) > > > if (ts) { > > > struct hci_iso_ts_data_hdr *hdr; > > > > > > - /* TODO: add timestamp to the packet? */ > > > - hdr = skb_pull_data(skb, HCI_ISO_TS_DATA_HDR_SIZE); > > > - if (!hdr) { > > > - BT_ERR("Frame is too short (len %d)", skb->len); > > > - goto drop; > > > - } > > > + if (test_bit(BT_SK_ISO_TS, &bt_sk(sk)->flags)) { > > > + hdr = (struct hci_iso_ts_data_hdr *)skb->data; > > > + len = hdr->slen + HCI_ISO_TS_DATA_HDR_SIZE; > > > + } else { > > > + hdr = skb_pull_data(skb, HCI_ISO_TS_DATA_HDR_SIZE); > > > + if (!hdr) { > > > + BT_ERR("Frame is too short (len %d)", skb->len); > > > + goto drop; > > > + } > > > > > > - len = __le16_to_cpu(hdr->slen); > > > + len = __le16_to_cpu(hdr->slen); > > > + } > > > } else { > > > struct hci_iso_data_hdr *hdr; > > > > > > + if (test_bit(BT_SK_ISO_TS, &bt_sk(sk)->flags)) { > > > + BT_ERR("Invalid option BT_SK_ISO_TS"); > > > + clear_bit(BT_SK_ISO_TS, &bt_sk(sk)->flags); > > > + } > > > + > > > hdr = skb_pull_data(skb, HCI_ISO_DATA_HDR_SIZE); > > > if (!hdr) { > > > BT_ERR("Frame is too short (len %d)", skb->len); > > > > > > --- > > > base-commit: 16b4f97defefd93cfaea017a7c3e8849322f7dde > > > change-id: 20250421-iso_ts-c82a300ae784 > > > > > > Best regards, -- Luiz Augusto von Dentz