From 5c0a0fc81f4dc786b42c4fc9c7c72ba635406ab5 Mon Sep 17 00:00:00 2001 From: Ying Xue Date: Fri, 18 Oct 2013 07:23:14 +0200 Subject: [PATCH 1/8] tipc: don't use memcpy to copy from user space tipc_msg_build() calls skb_copy_to_linear_data_offset() to copy data from user space to kernel space. However, the latter function does in its turn call memcpy() to perform the actual copying. This poses an obvious security and robustness risk, since memcpy() never makes any validity check on the pointer it is copying from. To correct this, we the replace the offending function call with a call to memcpy_fromiovecend(), which uses copy_from_user() to perform the copying. Signed-off-by: Ying Xue Reviewed-by: Paul Gortmaker Signed-off-by: Jon Maloy Signed-off-by: David S. Miller --- net/tipc/msg.c | 22 +++++++++------------- 1 file changed, 9 insertions(+), 13 deletions(-) diff --git a/net/tipc/msg.c b/net/tipc/msg.c index ced60e2fc4f7..1e76d91e5691 100644 --- a/net/tipc/msg.c +++ b/net/tipc/msg.c @@ -76,10 +76,11 @@ int tipc_msg_build(struct tipc_msg *hdr, struct iovec const *msg_sect, u32 num_sect, unsigned int total_len, int max_size, struct sk_buff **buf) { - int dsz, sz, hsz, pos, res, cnt; + int dsz, sz, hsz; + unsigned char *to; dsz = total_len; - pos = hsz = msg_hdr_sz(hdr); + hsz = msg_hdr_sz(hdr); sz = hsz + dsz; msg_set_size(hdr, sz); if (unlikely(sz > max_size)) { @@ -91,16 +92,11 @@ int tipc_msg_build(struct tipc_msg *hdr, struct iovec const *msg_sect, if (!(*buf)) return -ENOMEM; skb_copy_to_linear_data(*buf, hdr, hsz); - for (res = 1, cnt = 0; res && (cnt < num_sect); cnt++) { - skb_copy_to_linear_data_offset(*buf, pos, - msg_sect[cnt].iov_base, - msg_sect[cnt].iov_len); - pos += msg_sect[cnt].iov_len; + to = (*buf)->data + hsz; + if (total_len && memcpy_fromiovecend(to, msg_sect, 0, dsz)) { + kfree_skb(*buf); + *buf = NULL; + return -EFAULT; } - if (likely(res)) - return dsz; - - kfree_skb(*buf); - *buf = NULL; - return -EFAULT; + return dsz; } From 9446b87addd90a067b21c726aedd3c42694c1780 Mon Sep 17 00:00:00 2001 From: Ying Xue Date: Fri, 18 Oct 2013 07:23:15 +0200 Subject: [PATCH 2/8] tipc: remove iovec length parameter from all sending functions tipc_msg_build() now copies message data from iovec to skb_buff using memcpy_fromiovecend(), which doesn't need to be passed the iovec length to perform the copying. So we remove the parameter indicating iovec length in all functions where TIPC messages are built and sent. Signed-off-by: Ying Xue Reviewed-by: Paul Gortmaker Signed-off-by: Jon Maloy Signed-off-by: David S. Miller --- net/tipc/link.c | 25 +++++++----------- net/tipc/link.h | 4 +-- net/tipc/msg.c | 7 +++-- net/tipc/msg.h | 3 +-- net/tipc/port.c | 66 +++++++++++++++++++---------------------------- net/tipc/port.h | 16 +++++------- net/tipc/socket.c | 6 +---- 7 files changed, 49 insertions(+), 78 deletions(-) diff --git a/net/tipc/link.c b/net/tipc/link.c index 0cc3d9015c5d..b02a6dc4efe4 100644 --- a/net/tipc/link.c +++ b/net/tipc/link.c @@ -97,8 +97,7 @@ static int link_recv_changeover_msg(struct tipc_link **l_ptr, static void link_set_supervision_props(struct tipc_link *l_ptr, u32 tolerance); static int link_send_sections_long(struct tipc_port *sender, struct iovec const *msg_sect, - u32 num_sect, unsigned int total_len, - u32 destnode); + unsigned int len, u32 destnode); static void link_state_event(struct tipc_link *l_ptr, u32 event); static void link_reset_statistics(struct tipc_link *l_ptr); static void link_print(struct tipc_link *l_ptr, const char *str); @@ -1065,8 +1064,7 @@ static int link_send_buf_fast(struct tipc_link *l_ptr, struct sk_buff *buf, */ int tipc_link_send_sections_fast(struct tipc_port *sender, struct iovec const *msg_sect, - const u32 num_sect, unsigned int total_len, - u32 destaddr) + unsigned int len, u32 destaddr) { struct tipc_msg *hdr = &sender->phdr; struct tipc_link *l_ptr; @@ -1080,8 +1078,7 @@ again: * Try building message using port's max_pkt hint. * (Must not hold any locks while building message.) */ - res = tipc_msg_build(hdr, msg_sect, num_sect, total_len, - sender->max_pkt, &buf); + res = tipc_msg_build(hdr, msg_sect, len, sender->max_pkt, &buf); /* Exit if build request was invalid */ if (unlikely(res < 0)) return res; @@ -1121,8 +1118,7 @@ exit: if ((msg_hdr_sz(hdr) + res) <= sender->max_pkt) goto again; - return link_send_sections_long(sender, msg_sect, - num_sect, total_len, + return link_send_sections_long(sender, msg_sect, len, destaddr); } tipc_node_unlock(node); @@ -1133,8 +1129,8 @@ exit: if (buf) return tipc_reject_msg(buf, TIPC_ERR_NO_NODE); if (res >= 0) - return tipc_port_reject_sections(sender, hdr, msg_sect, num_sect, - total_len, TIPC_ERR_NO_NODE); + return tipc_port_reject_sections(sender, hdr, msg_sect, + len, TIPC_ERR_NO_NODE); return res; } @@ -1154,13 +1150,12 @@ exit: */ static int link_send_sections_long(struct tipc_port *sender, struct iovec const *msg_sect, - u32 num_sect, unsigned int total_len, - u32 destaddr) + unsigned int len, u32 destaddr) { struct tipc_link *l_ptr; struct tipc_node *node; struct tipc_msg *hdr = &sender->phdr; - u32 dsz = total_len; + u32 dsz = len; u32 max_pkt, fragm_sz, rest; struct tipc_msg fragm_hdr; struct sk_buff *buf, *buf_chain, *prev; @@ -1283,8 +1278,8 @@ reject: buf = buf_chain->next; kfree_skb(buf_chain); } - return tipc_port_reject_sections(sender, hdr, msg_sect, num_sect, - total_len, TIPC_ERR_NO_NODE); + return tipc_port_reject_sections(sender, hdr, msg_sect, + len, TIPC_ERR_NO_NODE); } /* Append chain of fragments to send queue & send them */ diff --git a/net/tipc/link.h b/net/tipc/link.h index c048ed1cbd76..55cf8554a08b 100644 --- a/net/tipc/link.h +++ b/net/tipc/link.h @@ -227,9 +227,7 @@ int tipc_link_send_buf(struct tipc_link *l_ptr, struct sk_buff *buf); u32 tipc_link_get_max_pkt(u32 dest, u32 selector); int tipc_link_send_sections_fast(struct tipc_port *sender, struct iovec const *msg_sect, - const u32 num_sect, - unsigned int total_len, - u32 destnode); + unsigned int len, u32 destnode); void tipc_link_recv_bundle(struct sk_buff *buf); int tipc_link_recv_fragment(struct sk_buff **pending, struct sk_buff **fb, diff --git a/net/tipc/msg.c b/net/tipc/msg.c index 1e76d91e5691..e525f8ce1dee 100644 --- a/net/tipc/msg.c +++ b/net/tipc/msg.c @@ -73,13 +73,12 @@ void tipc_msg_init(struct tipc_msg *m, u32 user, u32 type, u32 hsize, * Returns message data size or errno */ int tipc_msg_build(struct tipc_msg *hdr, struct iovec const *msg_sect, - u32 num_sect, unsigned int total_len, int max_size, - struct sk_buff **buf) + unsigned int len, int max_size, struct sk_buff **buf) { int dsz, sz, hsz; unsigned char *to; - dsz = total_len; + dsz = len; hsz = msg_hdr_sz(hdr); sz = hsz + dsz; msg_set_size(hdr, sz); @@ -93,7 +92,7 @@ int tipc_msg_build(struct tipc_msg *hdr, struct iovec const *msg_sect, return -ENOMEM; skb_copy_to_linear_data(*buf, hdr, hsz); to = (*buf)->data + hsz; - if (total_len && memcpy_fromiovecend(to, msg_sect, 0, dsz)) { + if (len && memcpy_fromiovecend(to, msg_sect, 0, dsz)) { kfree_skb(*buf); *buf = NULL; return -EFAULT; diff --git a/net/tipc/msg.h b/net/tipc/msg.h index 5e4ccf5c27df..559b73a9bf35 100644 --- a/net/tipc/msg.h +++ b/net/tipc/msg.h @@ -722,6 +722,5 @@ u32 tipc_msg_tot_importance(struct tipc_msg *m); void tipc_msg_init(struct tipc_msg *m, u32 user, u32 type, u32 hsize, u32 destnode); int tipc_msg_build(struct tipc_msg *hdr, struct iovec const *msg_sect, - u32 num_sect, unsigned int total_len, int max_size, - struct sk_buff **buf); + unsigned int len, int max_size, struct sk_buff **buf); #endif diff --git a/net/tipc/port.c b/net/tipc/port.c index b3ed2fcab4fb..c081a7632302 100644 --- a/net/tipc/port.c +++ b/net/tipc/port.c @@ -90,8 +90,7 @@ int tipc_port_peer_msg(struct tipc_port *p_ptr, struct tipc_msg *msg) * tipc_multicast - send a multicast message to local and remote destinations */ int tipc_multicast(u32 ref, struct tipc_name_seq const *seq, - u32 num_sect, struct iovec const *msg_sect, - unsigned int total_len) + struct iovec const *msg_sect, unsigned int len) { struct tipc_msg *hdr; struct sk_buff *buf; @@ -114,8 +113,7 @@ int tipc_multicast(u32 ref, struct tipc_name_seq const *seq, msg_set_namelower(hdr, seq->lower); msg_set_nameupper(hdr, seq->upper); msg_set_hdr_sz(hdr, MCAST_H_SIZE); - res = tipc_msg_build(hdr, msg_sect, num_sect, total_len, MAX_MSG_SIZE, - &buf); + res = tipc_msg_build(hdr, msg_sect, len, MAX_MSG_SIZE, &buf); if (unlikely(!buf)) return res; @@ -436,14 +434,13 @@ exit: } int tipc_port_reject_sections(struct tipc_port *p_ptr, struct tipc_msg *hdr, - struct iovec const *msg_sect, u32 num_sect, - unsigned int total_len, int err) + struct iovec const *msg_sect, unsigned int len, + int err) { struct sk_buff *buf; int res; - res = tipc_msg_build(hdr, msg_sect, num_sect, total_len, MAX_MSG_SIZE, - &buf); + res = tipc_msg_build(hdr, msg_sect, len, MAX_MSG_SIZE, &buf); if (!buf) return res; @@ -918,15 +915,14 @@ int tipc_port_recv_msg(struct sk_buff *buf) * tipc_port_recv_sections(): Concatenate and deliver sectioned * message for this node. */ -static int tipc_port_recv_sections(struct tipc_port *sender, unsigned int num_sect, +static int tipc_port_recv_sections(struct tipc_port *sender, struct iovec const *msg_sect, - unsigned int total_len) + unsigned int len) { struct sk_buff *buf; int res; - res = tipc_msg_build(&sender->phdr, msg_sect, num_sect, total_len, - MAX_MSG_SIZE, &buf); + res = tipc_msg_build(&sender->phdr, msg_sect, len, MAX_MSG_SIZE, &buf); if (likely(buf)) tipc_port_recv_msg(buf); return res; @@ -935,8 +931,7 @@ static int tipc_port_recv_sections(struct tipc_port *sender, unsigned int num_se /** * tipc_send - send message sections on connection */ -int tipc_send(u32 ref, unsigned int num_sect, struct iovec const *msg_sect, - unsigned int total_len) +int tipc_send(u32 ref, struct iovec const *msg_sect, unsigned int len) { struct tipc_port *p_ptr; u32 destnode; @@ -950,11 +945,10 @@ int tipc_send(u32 ref, unsigned int num_sect, struct iovec const *msg_sect, if (!tipc_port_congested(p_ptr)) { destnode = port_peernode(p_ptr); if (likely(!in_own_node(destnode))) - res = tipc_link_send_sections_fast(p_ptr, msg_sect, num_sect, - total_len, destnode); + res = tipc_link_send_sections_fast(p_ptr, msg_sect, + len, destnode); else - res = tipc_port_recv_sections(p_ptr, num_sect, msg_sect, - total_len); + res = tipc_port_recv_sections(p_ptr, msg_sect, len); if (likely(res != -ELINKCONG)) { p_ptr->congested = 0; @@ -965,7 +959,7 @@ int tipc_send(u32 ref, unsigned int num_sect, struct iovec const *msg_sect, } if (port_unreliable(p_ptr)) { p_ptr->congested = 0; - return total_len; + return len; } return -ELINKCONG; } @@ -974,8 +968,7 @@ int tipc_send(u32 ref, unsigned int num_sect, struct iovec const *msg_sect, * tipc_send2name - send message sections to port name */ int tipc_send2name(u32 ref, struct tipc_name const *name, unsigned int domain, - unsigned int num_sect, struct iovec const *msg_sect, - unsigned int total_len) + struct iovec const *msg_sect, unsigned int len) { struct tipc_port *p_ptr; struct tipc_msg *msg; @@ -999,36 +992,32 @@ int tipc_send2name(u32 ref, struct tipc_name const *name, unsigned int domain, if (likely(destport || destnode)) { if (likely(in_own_node(destnode))) - res = tipc_port_recv_sections(p_ptr, num_sect, - msg_sect, total_len); + res = tipc_port_recv_sections(p_ptr, msg_sect, len); else if (tipc_own_addr) res = tipc_link_send_sections_fast(p_ptr, msg_sect, - num_sect, total_len, - destnode); + len, destnode); else res = tipc_port_reject_sections(p_ptr, msg, msg_sect, - num_sect, total_len, - TIPC_ERR_NO_NODE); + len, TIPC_ERR_NO_NODE); if (likely(res != -ELINKCONG)) { if (res > 0) p_ptr->sent++; return res; } if (port_unreliable(p_ptr)) { - return total_len; + return len; } return -ELINKCONG; } - return tipc_port_reject_sections(p_ptr, msg, msg_sect, num_sect, - total_len, TIPC_ERR_NO_NAME); + return tipc_port_reject_sections(p_ptr, msg, msg_sect, len, + TIPC_ERR_NO_NAME); } /** * tipc_send2port - send message sections to port identity */ int tipc_send2port(u32 ref, struct tipc_portid const *dest, - unsigned int num_sect, struct iovec const *msg_sect, - unsigned int total_len) + struct iovec const *msg_sect, unsigned int len) { struct tipc_port *p_ptr; struct tipc_msg *msg; @@ -1046,21 +1035,20 @@ int tipc_send2port(u32 ref, struct tipc_portid const *dest, msg_set_hdr_sz(msg, BASIC_H_SIZE); if (in_own_node(dest->node)) - res = tipc_port_recv_sections(p_ptr, num_sect, msg_sect, - total_len); + res = tipc_port_recv_sections(p_ptr, msg_sect, len); else if (tipc_own_addr) - res = tipc_link_send_sections_fast(p_ptr, msg_sect, num_sect, - total_len, dest->node); + res = tipc_link_send_sections_fast(p_ptr, msg_sect, len, + dest->node); else - res = tipc_port_reject_sections(p_ptr, msg, msg_sect, num_sect, - total_len, TIPC_ERR_NO_NODE); + res = tipc_port_reject_sections(p_ptr, msg, msg_sect, len, + TIPC_ERR_NO_NODE); if (likely(res != -ELINKCONG)) { if (res > 0) p_ptr->sent++; return res; } if (port_unreliable(p_ptr)) { - return total_len; + return len; } return -ELINKCONG; } diff --git a/net/tipc/port.h b/net/tipc/port.h index 5a7026b9c345..912253597343 100644 --- a/net/tipc/port.h +++ b/net/tipc/port.h @@ -151,24 +151,20 @@ int tipc_port_peer_msg(struct tipc_port *p_ptr, struct tipc_msg *msg); * TIPC messaging routines */ int tipc_port_recv_msg(struct sk_buff *buf); -int tipc_send(u32 portref, unsigned int num_sect, struct iovec const *msg_sect, - unsigned int total_len); +int tipc_send(u32 portref, struct iovec const *msg_sect, unsigned int len); int tipc_send2name(u32 portref, struct tipc_name const *name, u32 domain, - unsigned int num_sect, struct iovec const *msg_sect, - unsigned int total_len); + struct iovec const *msg_sect, unsigned int len); int tipc_send2port(u32 portref, struct tipc_portid const *dest, - unsigned int num_sect, struct iovec const *msg_sect, - unsigned int total_len); + struct iovec const *msg_sect, unsigned int len); int tipc_multicast(u32 portref, struct tipc_name_seq const *seq, - unsigned int section_count, struct iovec const *msg, - unsigned int total_len); + struct iovec const *msg, unsigned int len); int tipc_port_reject_sections(struct tipc_port *p_ptr, struct tipc_msg *hdr, - struct iovec const *msg_sect, u32 num_sect, - unsigned int total_len, int err); + struct iovec const *msg_sect, unsigned int len, + int err); struct sk_buff *tipc_port_get_ports(void); void tipc_port_recv_proto_msg(struct sk_buff *buf); void tipc_port_recv_mcast(struct sk_buff *buf, struct tipc_port_list *dp); diff --git a/net/tipc/socket.c b/net/tipc/socket.c index 6cc7ddd2fb7c..d224382d8270 100644 --- a/net/tipc/socket.c +++ b/net/tipc/socket.c @@ -622,13 +622,11 @@ static int send_msg(struct kiocb *iocb, struct socket *sock, res = tipc_send2name(tport->ref, &dest->addr.name.name, dest->addr.name.domain, - m->msg_iovlen, m->msg_iov, total_len); } else if (dest->addrtype == TIPC_ADDR_ID) { res = tipc_send2port(tport->ref, &dest->addr.id, - m->msg_iovlen, m->msg_iov, total_len); } else if (dest->addrtype == TIPC_ADDR_MCAST) { @@ -641,7 +639,6 @@ static int send_msg(struct kiocb *iocb, struct socket *sock, break; res = tipc_multicast(tport->ref, &dest->addr.nameseq, - m->msg_iovlen, m->msg_iov, total_len); } @@ -707,8 +704,7 @@ static int send_packet(struct kiocb *iocb, struct socket *sock, break; } - res = tipc_send(tport->ref, m->msg_iovlen, m->msg_iov, - total_len); + res = tipc_send(tport->ref, m->msg_iov, total_len); if (likely(res != -ELINKCONG)) break; if (timeout_val <= 0L) { From 4068243208d605b046479e25c253379069a05fed Mon Sep 17 00:00:00 2001 From: Ying Xue Date: Fri, 18 Oct 2013 07:23:16 +0200 Subject: [PATCH 3/8] tipc: silence sparse warnings MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Eliminate below sparse warnings: net/tipc/link.c:1210:37: warning: cast removes address space of expression net/tipc/link.c:1218:59: warning: incorrect type in argument 2 (different address spaces) net/tipc/link.c:1218:59: expected void const [noderef] *from net/tipc/link.c:1218:59: got unsigned char const [usertype] *[assigned] sect_crs net/tipc/socket.c:341:49: warning: Using plain integer as NULL pointer net/tipc/socket.c:1371:36: warning: Using plain integer as NULL pointer net/tipc/socket.c:1694:57: warning: Using plain integer as NULL pointer Signed-off-by: Ying Xue Signed-off-by: Andreas Bofjäll Reviewed-by: Paul Gortmaker Signed-off-by: Jon Maloy Signed-off-by: David S. Miller --- net/tipc/link.c | 4 ++-- net/tipc/socket.c | 6 +++--- 2 files changed, 5 insertions(+), 5 deletions(-) diff --git a/net/tipc/link.c b/net/tipc/link.c index b02a6dc4efe4..be73a1fa7c65 100644 --- a/net/tipc/link.c +++ b/net/tipc/link.c @@ -1160,7 +1160,7 @@ static int link_send_sections_long(struct tipc_port *sender, struct tipc_msg fragm_hdr; struct sk_buff *buf, *buf_chain, *prev; u32 fragm_crs, fragm_rest, hsz, sect_rest; - const unchar *sect_crs; + const unchar __user *sect_crs; int curr_sect; u32 fragm_no; int res = 0; @@ -1202,7 +1202,7 @@ again: if (!sect_rest) { sect_rest = msg_sect[++curr_sect].iov_len; - sect_crs = (const unchar *)msg_sect[curr_sect].iov_base; + sect_crs = msg_sect[curr_sect].iov_base; } if (sect_rest < fragm_rest) diff --git a/net/tipc/socket.c b/net/tipc/socket.c index d224382d8270..3906527259d1 100644 --- a/net/tipc/socket.c +++ b/net/tipc/socket.c @@ -338,7 +338,7 @@ static int release(struct socket *sock) buf = __skb_dequeue(&sk->sk_receive_queue); if (buf == NULL) break; - if (TIPC_SKB_CB(buf)->handle != 0) + if (TIPC_SKB_CB(buf)->handle != NULL) kfree_skb(buf); else { if ((sock->state == SS_CONNECTING) || @@ -1364,7 +1364,7 @@ static u32 filter_rcv(struct sock *sk, struct sk_buff *buf) return TIPC_ERR_OVERLOAD; /* Enqueue message */ - TIPC_SKB_CB(buf)->handle = 0; + TIPC_SKB_CB(buf)->handle = NULL; __skb_queue_tail(&sk->sk_receive_queue, buf); skb_set_owner_r(buf, sk); @@ -1687,7 +1687,7 @@ restart: /* Disconnect and send a 'FIN+' or 'FIN-' message to peer */ buf = __skb_dequeue(&sk->sk_receive_queue); if (buf) { - if (TIPC_SKB_CB(buf)->handle != 0) { + if (TIPC_SKB_CB(buf)->handle != NULL) { kfree_skb(buf); goto restart; } From 4babbaa8a1ecf1cb76de5e1635417c7472190ef5 Mon Sep 17 00:00:00 2001 From: Ying Xue Date: Fri, 18 Oct 2013 07:23:17 +0200 Subject: [PATCH 4/8] tipc: make bearer and media naming consistent TIPC 'bearer' exists as an abstract concept, while 'media' is deemed a specific implementation of a bearer, such as Ethernet or Infiniband media. When a component inside TIPC wants to control a specific media, it only needs to access the generic bearer API to achieve this. However, in the current media implementations, the 'bearer' name is also extensively used in media specific function and variable names. This may create confusion, so we choose to replace the term 'bearer' with 'media' in all function names, variable names, and prefixes where this is what really is meant. Note that this change is cosmetic only, and no runtime behaviour changes are made here. Signed-off-by: Ying Xue Reviewed-by: Paul Gortmaker Signed-off-by: Jon Maloy Signed-off-by: David S. Miller --- net/tipc/bearer.c | 4 ++-- net/tipc/bearer.h | 8 +++---- net/tipc/eth_media.c | 56 ++++++++++++++++++++++---------------------- net/tipc/ib_media.c | 46 ++++++++++++++++++------------------ 4 files changed, 57 insertions(+), 57 deletions(-) diff --git a/net/tipc/bearer.c b/net/tipc/bearer.c index 609c30c80816..09faa5520079 100644 --- a/net/tipc/bearer.c +++ b/net/tipc/bearer.c @@ -387,7 +387,7 @@ restart: b_ptr = &tipc_bearers[bearer_id]; strcpy(b_ptr->name, name); - res = m_ptr->enable_bearer(b_ptr); + res = m_ptr->enable_media(b_ptr); if (res) { pr_warn("Bearer <%s> rejected, enable failure (%d)\n", name, -res); @@ -465,7 +465,7 @@ static void bearer_disable(struct tipc_bearer *b_ptr) pr_info("Disabling bearer <%s>\n", b_ptr->name); spin_lock_bh(&b_ptr->lock); b_ptr->blocked = 1; - b_ptr->media->disable_bearer(b_ptr); + b_ptr->media->disable_media(b_ptr); list_for_each_entry_safe(l_ptr, temp_l_ptr, &b_ptr->links, link_list) { tipc_link_delete(l_ptr); } diff --git a/net/tipc/bearer.h b/net/tipc/bearer.h index 09c869adcfcf..f800e63980cf 100644 --- a/net/tipc/bearer.h +++ b/net/tipc/bearer.h @@ -75,8 +75,8 @@ struct tipc_bearer; /** * struct tipc_media - TIPC media information available to internal users * @send_msg: routine which handles buffer transmission - * @enable_bearer: routine which enables a bearer - * @disable_bearer: routine which disables a bearer + * @enable_media: routine which enables a media + * @disable_media: routine which disables a media * @addr2str: routine which converts media address to string * @addr2msg: routine which converts media address to protocol message area * @msg2addr: routine which converts media address from protocol message area @@ -91,8 +91,8 @@ struct tipc_media { int (*send_msg)(struct sk_buff *buf, struct tipc_bearer *b_ptr, struct tipc_media_addr *dest); - int (*enable_bearer)(struct tipc_bearer *b_ptr); - void (*disable_bearer)(struct tipc_bearer *b_ptr); + int (*enable_media)(struct tipc_bearer *b_ptr); + void (*disable_media)(struct tipc_bearer *b_ptr); int (*addr2str)(struct tipc_media_addr *a, char *str_buf, int str_size); int (*addr2msg)(struct tipc_media_addr *a, char *msg_area); int (*msg2addr)(const struct tipc_bearer *b_ptr, diff --git a/net/tipc/eth_media.c b/net/tipc/eth_media.c index 40ea40cf6204..e048d491cc0b 100644 --- a/net/tipc/eth_media.c +++ b/net/tipc/eth_media.c @@ -2,7 +2,7 @@ * net/tipc/eth_media.c: Ethernet bearer support for TIPC * * Copyright (c) 2001-2007, Ericsson AB - * Copyright (c) 2005-2008, 2011, Wind River Systems + * Copyright (c) 2005-2008, 2011-2013, Wind River Systems * All rights reserved. * * Redistribution and use in source and binary forms, with or without @@ -37,19 +37,19 @@ #include "core.h" #include "bearer.h" -#define MAX_ETH_BEARERS MAX_BEARERS +#define MAX_ETH_MEDIA MAX_BEARERS #define ETH_ADDR_OFFSET 4 /* message header offset of MAC address */ /** - * struct eth_bearer - Ethernet bearer data structure + * struct eth_media - Ethernet bearer data structure * @bearer: ptr to associated "generic" bearer structure * @dev: ptr to associated Ethernet network device * @tipc_packet_type: used in binding TIPC to Ethernet driver * @setup: work item used when enabling bearer * @cleanup: work item used when disabling bearer */ -struct eth_bearer { +struct eth_media { struct tipc_bearer *bearer; struct net_device *dev; struct packet_type tipc_packet_type; @@ -58,7 +58,7 @@ struct eth_bearer { }; static struct tipc_media eth_media_info; -static struct eth_bearer eth_bearers[MAX_ETH_BEARERS]; +static struct eth_media eth_media_array[MAX_ETH_MEDIA]; static int eth_started; static int recv_notification(struct notifier_block *nb, unsigned long evt, @@ -100,7 +100,7 @@ static int send_msg(struct sk_buff *buf, struct tipc_bearer *tb_ptr, if (!clone) return 0; - dev = ((struct eth_bearer *)(tb_ptr->usr_handle))->dev; + dev = ((struct eth_media *)(tb_ptr->usr_handle))->dev; delta = dev->hard_header_len - skb_headroom(buf); if ((delta > 0) && @@ -128,7 +128,7 @@ static int send_msg(struct sk_buff *buf, struct tipc_bearer *tb_ptr, static int recv_msg(struct sk_buff *buf, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev) { - struct eth_bearer *eb_ptr = (struct eth_bearer *)pt->af_packet_priv; + struct eth_media *eb_ptr = (struct eth_media *)pt->af_packet_priv; if (!net_eq(dev_net(dev), &init_net)) { kfree_skb(buf); @@ -147,24 +147,24 @@ static int recv_msg(struct sk_buff *buf, struct net_device *dev, } /** - * setup_bearer - setup association between Ethernet bearer and interface + * setup_media - setup association between Ethernet bearer and interface */ -static void setup_bearer(struct work_struct *work) +static void setup_media(struct work_struct *work) { - struct eth_bearer *eb_ptr = - container_of(work, struct eth_bearer, setup); + struct eth_media *eb_ptr = + container_of(work, struct eth_media, setup); dev_add_pack(&eb_ptr->tipc_packet_type); } /** - * enable_bearer - attach TIPC bearer to an Ethernet interface + * enable_media - attach TIPC bearer to an Ethernet interface */ -static int enable_bearer(struct tipc_bearer *tb_ptr) +static int enable_media(struct tipc_bearer *tb_ptr) { struct net_device *dev; - struct eth_bearer *eb_ptr = ð_bearers[0]; - struct eth_bearer *stop = ð_bearers[MAX_ETH_BEARERS]; + struct eth_media *eb_ptr = ð_media_array[0]; + struct eth_media *stop = ð_media_array[MAX_ETH_MEDIA]; char *driver_name = strchr((const char *)tb_ptr->name, ':') + 1; int pending_dev = 0; @@ -188,7 +188,7 @@ static int enable_bearer(struct tipc_bearer *tb_ptr) eb_ptr->tipc_packet_type.func = recv_msg; eb_ptr->tipc_packet_type.af_packet_priv = eb_ptr; INIT_LIST_HEAD(&(eb_ptr->tipc_packet_type.list)); - INIT_WORK(&eb_ptr->setup, setup_bearer); + INIT_WORK(&eb_ptr->setup, setup_media); schedule_work(&eb_ptr->setup); /* Associate TIPC bearer with Ethernet bearer */ @@ -205,14 +205,14 @@ static int enable_bearer(struct tipc_bearer *tb_ptr) } /** - * cleanup_bearer - break association between Ethernet bearer and interface + * cleanup_media - break association between Ethernet bearer and interface * * This routine must be invoked from a work queue because it can sleep. */ -static void cleanup_bearer(struct work_struct *work) +static void cleanup_media(struct work_struct *work) { - struct eth_bearer *eb_ptr = - container_of(work, struct eth_bearer, cleanup); + struct eth_media *eb_ptr = + container_of(work, struct eth_media, cleanup); dev_remove_pack(&eb_ptr->tipc_packet_type); dev_put(eb_ptr->dev); @@ -220,18 +220,18 @@ static void cleanup_bearer(struct work_struct *work) } /** - * disable_bearer - detach TIPC bearer from an Ethernet interface + * disable_media - detach TIPC bearer from an Ethernet interface * * Mark Ethernet bearer as inactive so that incoming buffers are thrown away, * then get worker thread to complete bearer cleanup. (Can't do cleanup * here because cleanup code needs to sleep and caller holds spinlocks.) */ -static void disable_bearer(struct tipc_bearer *tb_ptr) +static void disable_media(struct tipc_bearer *tb_ptr) { - struct eth_bearer *eb_ptr = (struct eth_bearer *)tb_ptr->usr_handle; + struct eth_media *eb_ptr = (struct eth_media *)tb_ptr->usr_handle; eb_ptr->bearer = NULL; - INIT_WORK(&eb_ptr->cleanup, cleanup_bearer); + INIT_WORK(&eb_ptr->cleanup, cleanup_media); schedule_work(&eb_ptr->cleanup); } @@ -245,8 +245,8 @@ static int recv_notification(struct notifier_block *nb, unsigned long evt, void *ptr) { struct net_device *dev = netdev_notifier_info_to_dev(ptr); - struct eth_bearer *eb_ptr = ð_bearers[0]; - struct eth_bearer *stop = ð_bearers[MAX_ETH_BEARERS]; + struct eth_media *eb_ptr = ð_media_array[0]; + struct eth_media *stop = ð_media_array[MAX_ETH_MEDIA]; if (!net_eq(dev_net(dev), &init_net)) return NOTIFY_DONE; @@ -327,8 +327,8 @@ static int eth_msg2addr(const struct tipc_bearer *tb_ptr, */ static struct tipc_media eth_media_info = { .send_msg = send_msg, - .enable_bearer = enable_bearer, - .disable_bearer = disable_bearer, + .enable_media = enable_media, + .disable_media = disable_media, .addr2str = eth_addr2str, .addr2msg = eth_addr2msg, .msg2addr = eth_msg2addr, diff --git a/net/tipc/ib_media.c b/net/tipc/ib_media.c index 9934a32bfa87..5545145ccffa 100644 --- a/net/tipc/ib_media.c +++ b/net/tipc/ib_media.c @@ -42,17 +42,17 @@ #include "core.h" #include "bearer.h" -#define MAX_IB_BEARERS MAX_BEARERS +#define MAX_IB_MEDIA MAX_BEARERS /** - * struct ib_bearer - Infiniband bearer data structure + * struct ib_media - Infiniband media data structure * @bearer: ptr to associated "generic" bearer structure * @dev: ptr to associated Infiniband network device * @tipc_packet_type: used in binding TIPC to Infiniband driver * @cleanup: work item used when disabling bearer */ -struct ib_bearer { +struct ib_media { struct tipc_bearer *bearer; struct net_device *dev; struct packet_type tipc_packet_type; @@ -61,7 +61,7 @@ struct ib_bearer { }; static struct tipc_media ib_media_info; -static struct ib_bearer ib_bearers[MAX_IB_BEARERS]; +static struct ib_media ib_media_array[MAX_IB_MEDIA]; static int ib_started; /** @@ -93,7 +93,7 @@ static int send_msg(struct sk_buff *buf, struct tipc_bearer *tb_ptr, if (!clone) return 0; - dev = ((struct ib_bearer *)(tb_ptr->usr_handle))->dev; + dev = ((struct ib_media *)(tb_ptr->usr_handle))->dev; delta = dev->hard_header_len - skb_headroom(buf); if ((delta > 0) && @@ -121,7 +121,7 @@ static int send_msg(struct sk_buff *buf, struct tipc_bearer *tb_ptr, static int recv_msg(struct sk_buff *buf, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev) { - struct ib_bearer *ib_ptr = (struct ib_bearer *)pt->af_packet_priv; + struct ib_media *ib_ptr = (struct ib_media *)pt->af_packet_priv; if (!net_eq(dev_net(dev), &init_net)) { kfree_skb(buf); @@ -142,22 +142,22 @@ static int recv_msg(struct sk_buff *buf, struct net_device *dev, /** * setup_bearer - setup association between InfiniBand bearer and interface */ -static void setup_bearer(struct work_struct *work) +static void setup_media(struct work_struct *work) { - struct ib_bearer *ib_ptr = - container_of(work, struct ib_bearer, setup); + struct ib_media *ib_ptr = + container_of(work, struct ib_media, setup); dev_add_pack(&ib_ptr->tipc_packet_type); } /** - * enable_bearer - attach TIPC bearer to an InfiniBand interface + * enable_media - attach TIPC bearer to an InfiniBand interface */ -static int enable_bearer(struct tipc_bearer *tb_ptr) +static int enable_media(struct tipc_bearer *tb_ptr) { struct net_device *dev; - struct ib_bearer *ib_ptr = &ib_bearers[0]; - struct ib_bearer *stop = &ib_bearers[MAX_IB_BEARERS]; + struct ib_media *ib_ptr = &ib_media_array[0]; + struct ib_media *stop = &ib_media_array[MAX_IB_MEDIA]; char *driver_name = strchr((const char *)tb_ptr->name, ':') + 1; int pending_dev = 0; @@ -181,7 +181,7 @@ static int enable_bearer(struct tipc_bearer *tb_ptr) ib_ptr->tipc_packet_type.func = recv_msg; ib_ptr->tipc_packet_type.af_packet_priv = ib_ptr; INIT_LIST_HEAD(&(ib_ptr->tipc_packet_type.list)); - INIT_WORK(&ib_ptr->setup, setup_bearer); + INIT_WORK(&ib_ptr->setup, setup_media); schedule_work(&ib_ptr->setup); /* Associate TIPC bearer with InfiniBand bearer */ @@ -204,8 +204,8 @@ static int enable_bearer(struct tipc_bearer *tb_ptr) */ static void cleanup_bearer(struct work_struct *work) { - struct ib_bearer *ib_ptr = - container_of(work, struct ib_bearer, cleanup); + struct ib_media *ib_ptr = + container_of(work, struct ib_media, cleanup); dev_remove_pack(&ib_ptr->tipc_packet_type); dev_put(ib_ptr->dev); @@ -213,15 +213,15 @@ static void cleanup_bearer(struct work_struct *work) } /** - * disable_bearer - detach TIPC bearer from an InfiniBand interface + * disable_media - detach TIPC bearer from an InfiniBand interface * * Mark InfiniBand bearer as inactive so that incoming buffers are thrown away, * then get worker thread to complete bearer cleanup. (Can't do cleanup * here because cleanup code needs to sleep and caller holds spinlocks.) */ -static void disable_bearer(struct tipc_bearer *tb_ptr) +static void disable_media(struct tipc_bearer *tb_ptr) { - struct ib_bearer *ib_ptr = (struct ib_bearer *)tb_ptr->usr_handle; + struct ib_media *ib_ptr = (struct ib_media *)tb_ptr->usr_handle; ib_ptr->bearer = NULL; INIT_WORK(&ib_ptr->cleanup, cleanup_bearer); @@ -238,8 +238,8 @@ static int recv_notification(struct notifier_block *nb, unsigned long evt, void *ptr) { struct net_device *dev = netdev_notifier_info_to_dev(ptr); - struct ib_bearer *ib_ptr = &ib_bearers[0]; - struct ib_bearer *stop = &ib_bearers[MAX_IB_BEARERS]; + struct ib_media *ib_ptr = &ib_media_array[0]; + struct ib_media *stop = &ib_media_array[MAX_IB_MEDIA]; if (!net_eq(dev_net(dev), &init_net)) return NOTIFY_DONE; @@ -323,8 +323,8 @@ static int ib_msg2addr(const struct tipc_bearer *tb_ptr, */ static struct tipc_media ib_media_info = { .send_msg = send_msg, - .enable_bearer = enable_bearer, - .disable_bearer = disable_bearer, + .enable_media = enable_media, + .disable_media = disable_media, .addr2str = ib_addr2str, .addr2msg = ib_addr2msg, .msg2addr = ib_msg2addr, From f2875c3cc4769d07bab3bc6e51c386840a7de280 Mon Sep 17 00:00:00 2001 From: Ying Xue Date: Fri, 18 Oct 2013 07:23:18 +0200 Subject: [PATCH 5/8] tipc: avoid unnecessary lookup for tipc bearer instance tipc_block_bearer() currently takes a bearer name (const char*) as argument. This requires the function to make a lookup to find the pointer to the corresponding bearer struct. In the current code base this is not necessary, since the only two callers (tipc_continue(),recv_notification()) already have validated copies of this pointer, and hence can pass it directly in the function call. We change tipc_block_bearer() to directly take struct tipc_bearer* as argument instead. Signed-off-by: Ying Xue Reviewed-by: Paul Gortmaker Signed-off-by: Jon Maloy Signed-off-by: David S. Miller --- net/tipc/bearer.c | 14 +++----------- net/tipc/bearer.h | 2 +- net/tipc/eth_media.c | 6 +++--- net/tipc/ib_media.c | 6 +++--- 4 files changed, 10 insertions(+), 18 deletions(-) diff --git a/net/tipc/bearer.c b/net/tipc/bearer.c index 09faa5520079..3f9707a16d06 100644 --- a/net/tipc/bearer.c +++ b/net/tipc/bearer.c @@ -420,23 +420,15 @@ exit: } /** - * tipc_block_bearer - Block the bearer with the given name, and reset all its links + * tipc_block_bearer - Block the bearer, and reset all its links */ -int tipc_block_bearer(const char *name) +int tipc_block_bearer(struct tipc_bearer *b_ptr) { - struct tipc_bearer *b_ptr = NULL; struct tipc_link *l_ptr; struct tipc_link *temp_l_ptr; read_lock_bh(&tipc_net_lock); - b_ptr = tipc_bearer_find(name); - if (!b_ptr) { - pr_warn("Attempt to block unknown bearer <%s>\n", name); - read_unlock_bh(&tipc_net_lock); - return -EINVAL; - } - - pr_info("Blocking bearer <%s>\n", name); + pr_info("Blocking bearer <%s>\n", b_ptr->name); spin_lock_bh(&b_ptr->lock); b_ptr->blocked = 1; list_for_each_entry_safe(l_ptr, temp_l_ptr, &b_ptr->links, link_list) { diff --git a/net/tipc/bearer.h b/net/tipc/bearer.h index f800e63980cf..e5e04be6fffa 100644 --- a/net/tipc/bearer.h +++ b/net/tipc/bearer.h @@ -163,7 +163,7 @@ int tipc_register_media(struct tipc_media *m_ptr); void tipc_recv_msg(struct sk_buff *buf, struct tipc_bearer *tb_ptr); -int tipc_block_bearer(const char *name); +int tipc_block_bearer(struct tipc_bearer *b_ptr); void tipc_continue(struct tipc_bearer *tb_ptr); int tipc_enable_bearer(const char *bearer_name, u32 disc_domain, u32 priority); diff --git a/net/tipc/eth_media.c b/net/tipc/eth_media.c index e048d491cc0b..c36c938306a1 100644 --- a/net/tipc/eth_media.c +++ b/net/tipc/eth_media.c @@ -265,17 +265,17 @@ static int recv_notification(struct notifier_block *nb, unsigned long evt, if (netif_carrier_ok(dev)) tipc_continue(eb_ptr->bearer); else - tipc_block_bearer(eb_ptr->bearer->name); + tipc_block_bearer(eb_ptr->bearer); break; case NETDEV_UP: tipc_continue(eb_ptr->bearer); break; case NETDEV_DOWN: - tipc_block_bearer(eb_ptr->bearer->name); + tipc_block_bearer(eb_ptr->bearer); break; case NETDEV_CHANGEMTU: case NETDEV_CHANGEADDR: - tipc_block_bearer(eb_ptr->bearer->name); + tipc_block_bearer(eb_ptr->bearer); tipc_continue(eb_ptr->bearer); break; case NETDEV_UNREGISTER: diff --git a/net/tipc/ib_media.c b/net/tipc/ib_media.c index 5545145ccffa..20b1aa464321 100644 --- a/net/tipc/ib_media.c +++ b/net/tipc/ib_media.c @@ -258,17 +258,17 @@ static int recv_notification(struct notifier_block *nb, unsigned long evt, if (netif_carrier_ok(dev)) tipc_continue(ib_ptr->bearer); else - tipc_block_bearer(ib_ptr->bearer->name); + tipc_block_bearer(ib_ptr->bearer); break; case NETDEV_UP: tipc_continue(ib_ptr->bearer); break; case NETDEV_DOWN: - tipc_block_bearer(ib_ptr->bearer->name); + tipc_block_bearer(ib_ptr->bearer); break; case NETDEV_CHANGEMTU: case NETDEV_CHANGEADDR: - tipc_block_bearer(ib_ptr->bearer->name); + tipc_block_bearer(ib_ptr->bearer); tipc_continue(ib_ptr->bearer); break; case NETDEV_UNREGISTER: From 679815834857d5305dae108a03addccf16d86868 Mon Sep 17 00:00:00 2001 From: Ying Xue Date: Fri, 18 Oct 2013 07:23:19 +0200 Subject: [PATCH 6/8] tipc: correct return value of recv_msg routine Currently, rcv_msg() always returns zero on a packet delivery upcall from net_device. To make its behavior more compliant with the way this API should be used, we change this to let it return NET_RX_SUCCESS (which is zero anyway) when it is able to handle the packet, and NET_RX_DROP otherwise. The latter does not imply any functional change, it only enables the driver to keep more accurate statistics about the fate of delivered packets. Signed-off-by: Ying Xue Reviewed-by: Paul Gortmaker Signed-off-by: Jon Maloy Signed-off-by: David S. Miller --- net/tipc/eth_media.c | 6 +++--- net/tipc/ib_media.c | 6 +++--- 2 files changed, 6 insertions(+), 6 deletions(-) diff --git a/net/tipc/eth_media.c b/net/tipc/eth_media.c index c36c938306a1..f80d59f5a161 100644 --- a/net/tipc/eth_media.c +++ b/net/tipc/eth_media.c @@ -132,18 +132,18 @@ static int recv_msg(struct sk_buff *buf, struct net_device *dev, if (!net_eq(dev_net(dev), &init_net)) { kfree_skb(buf); - return 0; + return NET_RX_DROP; } if (likely(eb_ptr->bearer)) { if (likely(buf->pkt_type <= PACKET_BROADCAST)) { buf->next = NULL; tipc_recv_msg(buf, eb_ptr->bearer); - return 0; + return NET_RX_SUCCESS; } } kfree_skb(buf); - return 0; + return NET_RX_DROP; } /** diff --git a/net/tipc/ib_media.c b/net/tipc/ib_media.c index 20b1aa464321..c13989297464 100644 --- a/net/tipc/ib_media.c +++ b/net/tipc/ib_media.c @@ -125,18 +125,18 @@ static int recv_msg(struct sk_buff *buf, struct net_device *dev, if (!net_eq(dev_net(dev), &init_net)) { kfree_skb(buf); - return 0; + return NET_RX_DROP; } if (likely(ib_ptr->bearer)) { if (likely(buf->pkt_type <= PACKET_BROADCAST)) { buf->next = NULL; tipc_recv_msg(buf, ib_ptr->bearer); - return 0; + return NET_RX_SUCCESS; } } kfree_skb(buf); - return 0; + return NET_RX_DROP; } /** From 636c0371a737c27510df867161fb8100c2f086bd Mon Sep 17 00:00:00 2001 From: Ying Xue Date: Fri, 18 Oct 2013 07:23:20 +0200 Subject: [PATCH 7/8] tipc: correct return value of link_cmd_set_value routine link_cmd_set_value() takes commands for link, bearer and media related configuration. Genereally the function returns 0 when a command is recognized, and -EINVAL when it is not. However, in the switch for link related commands it returns 0 even when the command is unrecognized. This will sometimes make it look as if a failed configuration command has been successful, but has otherwise no negative effects. We remove this anomaly by returning -EINVAL even for link commands. We also rework all three switches to make them conforming to common kernel coding style. Signed-off-by: Ying Xue Reviewed-by: Paul Gortmaker Signed-off-by: Jon Maloy Signed-off-by: David S. Miller --- net/tipc/link.c | 28 +++++++++++++++++++--------- 1 file changed, 19 insertions(+), 9 deletions(-) diff --git a/net/tipc/link.c b/net/tipc/link.c index be73a1fa7c65..223bbc87e451 100644 --- a/net/tipc/link.c +++ b/net/tipc/link.c @@ -2641,6 +2641,7 @@ static int link_cmd_set_value(const char *name, u32 new_value, u16 cmd) struct tipc_link *l_ptr; struct tipc_bearer *b_ptr; struct tipc_media *m_ptr; + int res = 0; l_ptr = link_find_link(name, &node); if (l_ptr) { @@ -2663,9 +2664,12 @@ static int link_cmd_set_value(const char *name, u32 new_value, u16 cmd) case TIPC_CMD_SET_LINK_WINDOW: tipc_link_set_queue_limits(l_ptr, new_value); break; + default: + res = -EINVAL; + break; } tipc_node_unlock(node); - return 0; + return res; } b_ptr = tipc_bearer_find(name); @@ -2673,15 +2677,18 @@ static int link_cmd_set_value(const char *name, u32 new_value, u16 cmd) switch (cmd) { case TIPC_CMD_SET_LINK_TOL: b_ptr->tolerance = new_value; - return 0; + break; case TIPC_CMD_SET_LINK_PRI: b_ptr->priority = new_value; - return 0; + break; case TIPC_CMD_SET_LINK_WINDOW: b_ptr->window = new_value; - return 0; + break; + default: + res = -EINVAL; + break; } - return -EINVAL; + return res; } m_ptr = tipc_media_find(name); @@ -2690,15 +2697,18 @@ static int link_cmd_set_value(const char *name, u32 new_value, u16 cmd) switch (cmd) { case TIPC_CMD_SET_LINK_TOL: m_ptr->tolerance = new_value; - return 0; + break; case TIPC_CMD_SET_LINK_PRI: m_ptr->priority = new_value; - return 0; + break; case TIPC_CMD_SET_LINK_WINDOW: m_ptr->window = new_value; - return 0; + break; + default: + res = -EINVAL; + break; } - return -EINVAL; + return res; } struct sk_buff *tipc_link_cmd_config(const void *req_tlv_area, int req_tlv_space, From bbfbe47cc99ce093708aaf28b7f2c08d28045c67 Mon Sep 17 00:00:00 2001 From: Erik Hugne Date: Fri, 18 Oct 2013 07:23:21 +0200 Subject: [PATCH 8/8] tipc: simplify the link lookup routine When checking statistics or changing parameters on a link, the link_find_link function is used to locate the link with a given name. The complex method of deconstructing the name into local and remote address/interface is error prone and may fail if the interface names contains special characters. We change the lookup method to iterate over the list of nodes and compare the link names. Signed-off-by: Erik Hugne Reviewed-by: Paul Gortmaker Signed-off-by: Jon Maloy Signed-off-by: David S. Miller --- net/tipc/link.c | 110 ++++++------------------------------------------ 1 file changed, 13 insertions(+), 97 deletions(-) diff --git a/net/tipc/link.c b/net/tipc/link.c index 223bbc87e451..e8153f64d2d6 100644 --- a/net/tipc/link.c +++ b/net/tipc/link.c @@ -75,20 +75,6 @@ static const char *link_unk_evt = "Unknown link event "; */ #define START_CHANGEOVER 100000u -/** - * struct tipc_link_name - deconstructed link name - * @addr_local: network address of node at this end - * @if_local: name of interface at this end - * @addr_peer: network address of node at far end - * @if_peer: name of interface at far end - */ -struct tipc_link_name { - u32 addr_local; - char if_local[TIPC_MAX_IF_NAME]; - u32 addr_peer; - char if_peer[TIPC_MAX_IF_NAME]; -}; - static void link_handle_out_of_seq_msg(struct tipc_link *l_ptr, struct sk_buff *buf); static void link_recv_proto_msg(struct tipc_link *l_ptr, struct sk_buff *buf); @@ -159,72 +145,6 @@ int tipc_link_is_active(struct tipc_link *l_ptr) (l_ptr->owner->active_links[1] == l_ptr); } -/** - * link_name_validate - validate & (optionally) deconstruct tipc_link name - * @name: ptr to link name string - * @name_parts: ptr to area for link name components (or NULL if not needed) - * - * Returns 1 if link name is valid, otherwise 0. - */ -static int link_name_validate(const char *name, - struct tipc_link_name *name_parts) -{ - char name_copy[TIPC_MAX_LINK_NAME]; - char *addr_local; - char *if_local; - char *addr_peer; - char *if_peer; - char dummy; - u32 z_local, c_local, n_local; - u32 z_peer, c_peer, n_peer; - u32 if_local_len; - u32 if_peer_len; - - /* copy link name & ensure length is OK */ - name_copy[TIPC_MAX_LINK_NAME - 1] = 0; - /* need above in case non-Posix strncpy() doesn't pad with nulls */ - strncpy(name_copy, name, TIPC_MAX_LINK_NAME); - if (name_copy[TIPC_MAX_LINK_NAME - 1] != 0) - return 0; - - /* ensure all component parts of link name are present */ - addr_local = name_copy; - if_local = strchr(addr_local, ':'); - if (if_local == NULL) - return 0; - *(if_local++) = 0; - addr_peer = strchr(if_local, '-'); - if (addr_peer == NULL) - return 0; - *(addr_peer++) = 0; - if_local_len = addr_peer - if_local; - if_peer = strchr(addr_peer, ':'); - if (if_peer == NULL) - return 0; - *(if_peer++) = 0; - if_peer_len = strlen(if_peer) + 1; - - /* validate component parts of link name */ - if ((sscanf(addr_local, "%u.%u.%u%c", - &z_local, &c_local, &n_local, &dummy) != 3) || - (sscanf(addr_peer, "%u.%u.%u%c", - &z_peer, &c_peer, &n_peer, &dummy) != 3) || - (z_local > 255) || (c_local > 4095) || (n_local > 4095) || - (z_peer > 255) || (c_peer > 4095) || (n_peer > 4095) || - (if_local_len <= 1) || (if_local_len > TIPC_MAX_IF_NAME) || - (if_peer_len <= 1) || (if_peer_len > TIPC_MAX_IF_NAME)) - return 0; - - /* return link name components, if necessary */ - if (name_parts) { - name_parts->addr_local = tipc_addr(z_local, c_local, n_local); - strcpy(name_parts->if_local, if_local); - name_parts->addr_peer = tipc_addr(z_peer, c_peer, n_peer); - strcpy(name_parts->if_peer, if_peer); - } - return 1; -} - /** * link_timeout - handle expiration of link timer * @l_ptr: pointer to link @@ -2580,25 +2500,21 @@ void tipc_link_set_queue_limits(struct tipc_link *l_ptr, u32 window) static struct tipc_link *link_find_link(const char *name, struct tipc_node **node) { - struct tipc_link_name link_name_parts; - struct tipc_bearer *b_ptr; struct tipc_link *l_ptr; + struct tipc_node *n_ptr; + int i; - if (!link_name_validate(name, &link_name_parts)) - return NULL; - - b_ptr = tipc_bearer_find_interface(link_name_parts.if_local); - if (!b_ptr) - return NULL; - - *node = tipc_node_find(link_name_parts.addr_peer); - if (!*node) - return NULL; - - l_ptr = (*node)->links[b_ptr->identity]; - if (!l_ptr || strcmp(l_ptr->name, name)) - return NULL; - + list_for_each_entry(n_ptr, &tipc_node_list, list) { + for (i = 0; i < MAX_BEARERS; i++) { + l_ptr = n_ptr->links[i]; + if (l_ptr && !strcmp(l_ptr->name, name)) + goto found; + } + } + l_ptr = NULL; + n_ptr = NULL; +found: + *node = n_ptr; return l_ptr; }