diff options
author | John W. Linville | 2013-04-24 10:54:20 -0400 |
---|---|---|
committer | John W. Linville | 2013-04-24 10:54:20 -0400 |
commit | 6ed0e321a0aef14a894e26658108bf7e895c36a6 (patch) | |
tree | f49428d68ebcb1beb757296ea1559079210babbe /net/nfc | |
parent | 3dec2246c2ff11beb24ca1950f074b2bcbc85953 (diff) | |
parent | b006ed545cbadf1ebd4683719554742d20dbcede (diff) |
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-next into for-davem
Diffstat (limited to 'net/nfc')
-rw-r--r-- | net/nfc/core.c | 43 | ||||
-rw-r--r-- | net/nfc/llcp/commands.c | 30 | ||||
-rw-r--r-- | net/nfc/llcp/llcp.c | 127 | ||||
-rw-r--r-- | net/nfc/llcp/llcp.h | 5 | ||||
-rw-r--r-- | net/nfc/llcp/sock.c | 43 |
5 files changed, 194 insertions, 54 deletions
diff --git a/net/nfc/core.c b/net/nfc/core.c index 6ceee8e181ca..40d2527693da 100644 --- a/net/nfc/core.c +++ b/net/nfc/core.c @@ -27,6 +27,7 @@ #include <linux/kernel.h> #include <linux/module.h> #include <linux/slab.h> +#include <linux/rfkill.h> #include <linux/nfc.h> #include <net/genetlink.h> @@ -58,6 +59,11 @@ int nfc_dev_up(struct nfc_dev *dev) device_lock(&dev->dev); + if (dev->rfkill && rfkill_blocked(dev->rfkill)) { + rc = -ERFKILL; + goto error; + } + if (!device_is_registered(&dev->dev)) { rc = -ENODEV; goto error; @@ -117,6 +123,24 @@ error: return rc; } +static int nfc_rfkill_set_block(void *data, bool blocked) +{ + struct nfc_dev *dev = data; + + pr_debug("%s blocked %d", dev_name(&dev->dev), blocked); + + if (!blocked) + return 0; + + nfc_dev_down(dev); + + return 0; +} + +static const struct rfkill_ops nfc_rfkill_ops = { + .set_block = nfc_rfkill_set_block, +}; + /** * nfc_start_poll - start polling for nfc targets * @@ -143,6 +167,11 @@ int nfc_start_poll(struct nfc_dev *dev, u32 im_protocols, u32 tm_protocols) goto error; } + if (!dev->dev_up) { + rc = -ENODEV; + goto error; + } + if (dev->polling) { rc = -EBUSY; goto error; @@ -835,6 +864,15 @@ int nfc_register_device(struct nfc_dev *dev) pr_debug("The userspace won't be notified that the device %s was added\n", dev_name(&dev->dev)); + dev->rfkill = rfkill_alloc(dev_name(&dev->dev), &dev->dev, + RFKILL_TYPE_NFC, &nfc_rfkill_ops, dev); + if (dev->rfkill) { + if (rfkill_register(dev->rfkill) < 0) { + rfkill_destroy(dev->rfkill); + dev->rfkill = NULL; + } + } + return 0; } EXPORT_SYMBOL(nfc_register_device); @@ -852,6 +890,11 @@ void nfc_unregister_device(struct nfc_dev *dev) id = dev->idx; + if (dev->rfkill) { + rfkill_unregister(dev->rfkill); + rfkill_destroy(dev->rfkill); + } + if (dev->ops->check_presence) { device_lock(&dev->dev); dev->shutting_down = true; diff --git a/net/nfc/llcp/commands.c b/net/nfc/llcp/commands.c index b75a9b3f9e89..094f7e27e910 100644 --- a/net/nfc/llcp/commands.c +++ b/net/nfc/llcp/commands.c @@ -420,7 +420,8 @@ int nfc_llcp_send_connect(struct nfc_llcp_sock *sock) } /* If the socket parameters are not set, use the local ones */ - miux = sock->miux > LLCP_MAX_MIUX ? local->miux : sock->miux; + miux = be16_to_cpu(sock->miux) > LLCP_MAX_MIUX ? + local->miux : sock->miux; rw = sock->rw > LLCP_MAX_RW ? local->rw : sock->rw; miux_tlv = nfc_llcp_build_tlv(LLCP_TLV_MIUX, (u8 *)&miux, 0, @@ -475,7 +476,8 @@ int nfc_llcp_send_cc(struct nfc_llcp_sock *sock) return -ENODEV; /* If the socket parameters are not set, use the local ones */ - miux = sock->miux > LLCP_MAX_MIUX ? local->miux : sock->miux; + miux = be16_to_cpu(sock->miux) > LLCP_MAX_MIUX ? + local->miux : sock->miux; rw = sock->rw > LLCP_MAX_RW ? local->rw : sock->rw; miux_tlv = nfc_llcp_build_tlv(LLCP_TLV_MIUX, (u8 *)&miux, 0, @@ -656,6 +658,7 @@ int nfc_llcp_send_i_frame(struct nfc_llcp_sock *sock, struct nfc_llcp_local *local; size_t frag_len = 0, remaining_len; u8 *msg_data, *msg_ptr; + u16 remote_miu; pr_debug("Send I frame len %zd\n", len); @@ -692,9 +695,11 @@ int nfc_llcp_send_i_frame(struct nfc_llcp_sock *sock, remaining_len = len; msg_ptr = msg_data; - while (remaining_len > 0) { + do { + remote_miu = sock->remote_miu > LLCP_MAX_MIU ? + local->remote_miu : sock->remote_miu; - frag_len = min_t(size_t, sock->remote_miu, remaining_len); + frag_len = min_t(size_t, remote_miu, remaining_len); pr_debug("Fragment %zd bytes remaining %zd", frag_len, remaining_len); @@ -706,7 +711,8 @@ int nfc_llcp_send_i_frame(struct nfc_llcp_sock *sock, skb_put(pdu, LLCP_SEQUENCE_SIZE); - memcpy(skb_put(pdu, frag_len), msg_ptr, frag_len); + if (likely(frag_len > 0)) + memcpy(skb_put(pdu, frag_len), msg_ptr, frag_len); skb_queue_tail(&sock->tx_queue, pdu); @@ -718,7 +724,7 @@ int nfc_llcp_send_i_frame(struct nfc_llcp_sock *sock, remaining_len -= frag_len; msg_ptr += frag_len; - } + } while (remaining_len > 0); kfree(msg_data); @@ -732,6 +738,7 @@ int nfc_llcp_send_ui_frame(struct nfc_llcp_sock *sock, u8 ssap, u8 dsap, struct nfc_llcp_local *local; size_t frag_len = 0, remaining_len; u8 *msg_ptr, *msg_data; + u16 remote_miu; int err; pr_debug("Send UI frame len %zd\n", len); @@ -752,9 +759,11 @@ int nfc_llcp_send_ui_frame(struct nfc_llcp_sock *sock, u8 ssap, u8 dsap, remaining_len = len; msg_ptr = msg_data; - while (remaining_len > 0) { + do { + remote_miu = sock->remote_miu > LLCP_MAX_MIU ? + local->remote_miu : sock->remote_miu; - frag_len = min_t(size_t, sock->remote_miu, remaining_len); + frag_len = min_t(size_t, remote_miu, remaining_len); pr_debug("Fragment %zd bytes remaining %zd", frag_len, remaining_len); @@ -768,14 +777,15 @@ int nfc_llcp_send_ui_frame(struct nfc_llcp_sock *sock, u8 ssap, u8 dsap, pdu = llcp_add_header(pdu, dsap, ssap, LLCP_PDU_UI); - memcpy(skb_put(pdu, frag_len), msg_ptr, frag_len); + if (likely(frag_len > 0)) + memcpy(skb_put(pdu, frag_len), msg_ptr, frag_len); /* No need to check for the peer RW for UI frames */ skb_queue_tail(&local->tx_queue, pdu); remaining_len -= frag_len; msg_ptr += frag_len; - } + } while (remaining_len > 0); kfree(msg_data); diff --git a/net/nfc/llcp/llcp.c b/net/nfc/llcp/llcp.c index 7de0368aff0c..9e483c8e52f8 100644 --- a/net/nfc/llcp/llcp.c +++ b/net/nfc/llcp/llcp.c @@ -31,6 +31,8 @@ static u8 llcp_magic[3] = {0x46, 0x66, 0x6d}; static struct list_head llcp_devices; +static void nfc_llcp_rx_skb(struct nfc_llcp_local *local, struct sk_buff *skb); + void nfc_llcp_sock_link(struct llcp_sock_list *l, struct sock *sk) { write_lock(&l->lock); @@ -45,6 +47,12 @@ void nfc_llcp_sock_unlink(struct llcp_sock_list *l, struct sock *sk) write_unlock(&l->lock); } +void nfc_llcp_socket_remote_param_init(struct nfc_llcp_sock *sock) +{ + sock->remote_rw = LLCP_DEFAULT_RW; + sock->remote_miu = LLCP_MAX_MIU + 1; +} + static void nfc_llcp_socket_purge(struct nfc_llcp_sock *sock) { struct nfc_llcp_local *local = sock->local; @@ -68,7 +76,7 @@ static void nfc_llcp_socket_purge(struct nfc_llcp_sock *sock) } } -static void nfc_llcp_socket_release(struct nfc_llcp_local *local, bool listen, +static void nfc_llcp_socket_release(struct nfc_llcp_local *local, bool device, int err) { struct sock *sk; @@ -108,21 +116,6 @@ static void nfc_llcp_socket_release(struct nfc_llcp_local *local, bool listen, bh_unlock_sock(accept_sk); } - - if (listen == true) { - bh_unlock_sock(sk); - continue; - } - } - - /* - * If we have a connection less socket bound, we keep it alive - * if the device is still present. - */ - if (sk->sk_state == LLCP_BOUND && sk->sk_type == SOCK_DGRAM && - listen == true) { - bh_unlock_sock(sk); - continue; } if (err) @@ -137,11 +130,8 @@ static void nfc_llcp_socket_release(struct nfc_llcp_local *local, bool listen, write_unlock(&local->sockets.lock); - /* - * If we want to keep the listening sockets alive, - * we don't touch the RAW ones. - */ - if (listen == true) + /* If we still have a device, we keep the RAW sockets alive */ + if (device == true) return; write_lock(&local->raw_sockets.lock); @@ -173,9 +163,9 @@ struct nfc_llcp_local *nfc_llcp_local_get(struct nfc_llcp_local *local) return local; } -static void local_cleanup(struct nfc_llcp_local *local, bool listen) +static void local_cleanup(struct nfc_llcp_local *local) { - nfc_llcp_socket_release(local, listen, ENXIO); + nfc_llcp_socket_release(local, false, ENXIO); del_timer_sync(&local->link_timer); skb_queue_purge(&local->tx_queue); cancel_work_sync(&local->tx_work); @@ -194,7 +184,7 @@ static void local_release(struct kref *ref) local = container_of(ref, struct nfc_llcp_local, ref); list_del(&local->list); - local_cleanup(local, false); + local_cleanup(local); kfree(local); } @@ -1116,6 +1106,12 @@ static void nfc_llcp_recv_disc(struct nfc_llcp_local *local, dsap = nfc_llcp_dsap(skb); ssap = nfc_llcp_ssap(skb); + if ((dsap == 0) && (ssap == 0)) { + pr_debug("Connection termination"); + nfc_dep_link_down(local->dev); + return; + } + llcp_sock = nfc_llcp_sock_get(local, dsap, ssap); if (llcp_sock == NULL) { nfc_llcp_send_dm(local, dsap, ssap, LLCP_DM_NOCONN); @@ -1349,19 +1345,54 @@ exit: nfc_llcp_send_snl_sdres(local, &llc_sdres_list, sdres_tlvs_len); } -static void nfc_llcp_rx_work(struct work_struct *work) +static void nfc_llcp_recv_agf(struct nfc_llcp_local *local, struct sk_buff *skb) { - struct nfc_llcp_local *local = container_of(work, struct nfc_llcp_local, - rx_work); - u8 dsap, ssap, ptype; - struct sk_buff *skb; + u8 ptype; + u16 pdu_len; + struct sk_buff *new_skb; - skb = local->rx_pending; - if (skb == NULL) { - pr_debug("No pending SKB\n"); + if (skb->len <= LLCP_HEADER_SIZE) { + pr_err("Malformed AGF PDU\n"); return; } + skb_pull(skb, LLCP_HEADER_SIZE); + + while (skb->len > LLCP_AGF_PDU_HEADER_SIZE) { + pdu_len = skb->data[0] << 8 | skb->data[1]; + + skb_pull(skb, LLCP_AGF_PDU_HEADER_SIZE); + + if (pdu_len < LLCP_HEADER_SIZE || pdu_len > skb->len) { + pr_err("Malformed AGF PDU\n"); + return; + } + + ptype = nfc_llcp_ptype(skb); + + if (ptype == LLCP_PDU_SYMM || ptype == LLCP_PDU_AGF) + goto next; + + new_skb = nfc_alloc_recv_skb(pdu_len, GFP_KERNEL); + if (new_skb == NULL) { + pr_err("Could not allocate PDU\n"); + return; + } + + memcpy(skb_put(new_skb, pdu_len), skb->data, pdu_len); + + nfc_llcp_rx_skb(local, new_skb); + + kfree_skb(new_skb); +next: + skb_pull(skb, pdu_len); + } +} + +static void nfc_llcp_rx_skb(struct nfc_llcp_local *local, struct sk_buff *skb) +{ + u8 dsap, ssap, ptype; + ptype = nfc_llcp_ptype(skb); dsap = nfc_llcp_dsap(skb); ssap = nfc_llcp_ssap(skb); @@ -1372,10 +1403,6 @@ static void nfc_llcp_rx_work(struct work_struct *work) print_hex_dump(KERN_DEBUG, "LLCP Rx: ", DUMP_PREFIX_OFFSET, 16, 1, skb->data, skb->len, true); - __net_timestamp(skb); - - nfc_llcp_send_to_raw_sock(local, skb, NFC_LLCP_DIRECTION_RX); - switch (ptype) { case LLCP_PDU_SYMM: pr_debug("SYMM\n"); @@ -1418,7 +1445,30 @@ static void nfc_llcp_rx_work(struct work_struct *work) nfc_llcp_recv_hdlc(local, skb); break; + case LLCP_PDU_AGF: + pr_debug("AGF frame\n"); + nfc_llcp_recv_agf(local, skb); + break; } +} + +static void nfc_llcp_rx_work(struct work_struct *work) +{ + struct nfc_llcp_local *local = container_of(work, struct nfc_llcp_local, + rx_work); + struct sk_buff *skb; + + skb = local->rx_pending; + if (skb == NULL) { + pr_debug("No pending SKB\n"); + return; + } + + __net_timestamp(skb); + + nfc_llcp_send_to_raw_sock(local, skb, NFC_LLCP_DIRECTION_RX); + + nfc_llcp_rx_skb(local, skb); schedule_work(&local->tx_work); kfree_skb(local->rx_pending); @@ -1466,6 +1516,9 @@ void nfc_llcp_mac_is_down(struct nfc_dev *dev) if (local == NULL) return; + local->remote_miu = LLCP_DEFAULT_MIU; + local->remote_lto = LLCP_DEFAULT_LTO; + /* Close and purge all existing sockets */ nfc_llcp_socket_release(local, true, 0); } @@ -1553,7 +1606,7 @@ void nfc_llcp_unregister_device(struct nfc_dev *dev) return; } - local_cleanup(local, false); + local_cleanup(local); nfc_llcp_local_put(local); } diff --git a/net/nfc/llcp/llcp.h b/net/nfc/llcp/llcp.h index 7e87a66b02ec..ff8c434f7df8 100644 --- a/net/nfc/llcp/llcp.h +++ b/net/nfc/llcp/llcp.h @@ -31,6 +31,7 @@ enum llcp_state { #define LLCP_MAX_LTO 0xff #define LLCP_MAX_RW 15 #define LLCP_MAX_MIUX 0x7ff +#define LLCP_MAX_MIU (LLCP_MAX_MIUX + 128) #define LLCP_WKS_NUM_SAP 16 #define LLCP_SDP_NUM_SAP 16 @@ -124,7 +125,7 @@ struct nfc_llcp_sock { char *service_name; size_t service_name_len; u8 rw; - u16 miux; + __be16 miux; /* Remote link parameters */ @@ -162,6 +163,7 @@ struct nfc_llcp_ui_cb { #define LLCP_HEADER_SIZE 2 #define LLCP_SEQUENCE_SIZE 1 +#define LLCP_AGF_PDU_HEADER_SIZE 2 /* LLCP versions: 1.1 is 1.0 plus SDP */ #define LLCP_VERSION_10 0x10 @@ -210,6 +212,7 @@ struct nfc_llcp_ui_cb { void nfc_llcp_sock_link(struct llcp_sock_list *l, struct sock *s); void nfc_llcp_sock_unlink(struct llcp_sock_list *l, struct sock *s); +void nfc_llcp_socket_remote_param_init(struct nfc_llcp_sock *sock); struct nfc_llcp_local *nfc_llcp_find_local(struct nfc_dev *dev); struct nfc_llcp_local *nfc_llcp_local_get(struct nfc_llcp_local *local); int nfc_llcp_local_put(struct nfc_llcp_local *local); diff --git a/net/nfc/llcp/sock.c b/net/nfc/llcp/sock.c index c1101e6de170..d6faa47c9bba 100644 --- a/net/nfc/llcp/sock.c +++ b/net/nfc/llcp/sock.c @@ -279,7 +279,7 @@ static int nfc_llcp_setsockopt(struct socket *sock, int level, int optname, break; } - llcp_sock->miux = (u16) opt; + llcp_sock->miux = cpu_to_be16((u16) opt); break; @@ -299,9 +299,12 @@ static int nfc_llcp_setsockopt(struct socket *sock, int level, int optname, static int nfc_llcp_getsockopt(struct socket *sock, int level, int optname, char __user *optval, int __user *optlen) { + struct nfc_llcp_local *local; struct sock *sk = sock->sk; struct nfc_llcp_sock *llcp_sock = nfc_llcp_sock(sk); int len, err = 0; + u16 miux, remote_miu; + u8 rw; pr_debug("%p optname %d\n", sk, optname); @@ -311,19 +314,48 @@ static int nfc_llcp_getsockopt(struct socket *sock, int level, int optname, if (get_user(len, optlen)) return -EFAULT; + local = llcp_sock->local; + if (!local) + return -ENODEV; + len = min_t(u32, len, sizeof(u32)); lock_sock(sk); switch (optname) { case NFC_LLCP_RW: - if (put_user(llcp_sock->rw, (u32 __user *) optval)) + rw = llcp_sock->rw > LLCP_MAX_RW ? local->rw : llcp_sock->rw; + if (put_user(rw, (u32 __user *) optval)) err = -EFAULT; break; case NFC_LLCP_MIUX: - if (put_user(llcp_sock->miux, (u32 __user *) optval)) + miux = be16_to_cpu(llcp_sock->miux) > LLCP_MAX_MIUX ? + be16_to_cpu(local->miux) : be16_to_cpu(llcp_sock->miux); + + if (put_user(miux, (u32 __user *) optval)) + err = -EFAULT; + + break; + + case NFC_LLCP_REMOTE_MIU: + remote_miu = llcp_sock->remote_miu > LLCP_MAX_MIU ? + local->remote_miu : llcp_sock->remote_miu; + + if (put_user(remote_miu, (u32 __user *) optval)) + err = -EFAULT; + + break; + + case NFC_LLCP_REMOTE_LTO: + if (put_user(local->remote_lto / 10, (u32 __user *) optval)) + err = -EFAULT; + + break; + + case NFC_LLCP_REMOTE_RW: + if (put_user(llcp_sock->remote_rw, (u32 __user *) optval)) err = -EFAULT; break; @@ -925,13 +957,12 @@ struct sock *nfc_llcp_sock_alloc(struct socket *sock, int type, gfp_t gfp) llcp_sock->ssap = 0; llcp_sock->dsap = LLCP_SAP_SDP; llcp_sock->rw = LLCP_MAX_RW + 1; - llcp_sock->miux = LLCP_MAX_MIUX + 1; - llcp_sock->remote_rw = LLCP_DEFAULT_RW; - llcp_sock->remote_miu = LLCP_DEFAULT_MIU; + llcp_sock->miux = cpu_to_be16(LLCP_MAX_MIUX + 1); llcp_sock->send_n = llcp_sock->send_ack_n = 0; llcp_sock->recv_n = llcp_sock->recv_ack_n = 0; llcp_sock->remote_ready = 1; llcp_sock->reserved_ssap = LLCP_SAP_MAX; + nfc_llcp_socket_remote_param_init(llcp_sock); skb_queue_head_init(&llcp_sock->tx_queue); skb_queue_head_init(&llcp_sock->tx_pending_queue); INIT_LIST_HEAD(&llcp_sock->accept_queue); |