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Message-ID: <AM3PR05MB09354C6DF6438B46B7157766DC3F0@AM3PR05MB0935.eurprd05.prod.outlook.com> Date: Sun, 1 Feb 2015 14:29:46 +0000 From: Shachar Raindel <raindel@...lanox.com> To: Yann Droneaud <ydroneaud@...eya.com> CC: "roland@...nel.org" <roland@...nel.org>, "sean.hefty@...el.com" <sean.hefty@...el.com>, "linux-rdma@...r.kernel.org" <linux-rdma@...r.kernel.org>, "netdev@...r.kernel.org" <netdev@...r.kernel.org>, Liran Liss <liranl@...lanox.com>, Guy Shapiro <guysh@...lanox.com>, Haggai Eran <haggaie@...lanox.com>, Yotam Kenneth <yotamke@...lanox.com> Subject: RE: [PATCH for-next 05/10] IB/cm,cma: Move RDMA IP CM private-data parsing code from ib_cma to ib_cm > -----Original Message----- > From: Yann Droneaud [mailto:ydroneaud@...eya.com] > Sent: Sunday, February 01, 2015 2:56 PM > To: Shachar Raindel > Cc: roland@...nel.org; sean.hefty@...el.com; linux-rdma@...r.kernel.org; > netdev@...r.kernel.org; Liran Liss; Guy Shapiro; Haggai Eran; Yotam > Kenneth > Subject: Re: [PATCH for-next 05/10] IB/cm,cma: Move RDMA IP CM private- > data parsing code from ib_cma to ib_cm > > Le dimanche 01 février 2015 à 13:28 +0200, Shachar Raindel a écrit : > > From: Guy Shapiro <guysh@...lanox.com> > > > > When receiving a connection request, ib_cm needs to associate the > request with > > a network namespace. To do this, it needs to know the request's > destination > > IP. For this the RDMA IP CM packet formatting functionality needs to > be > > exposed to ib_cm. > > > > This patch merely moves the RDMA IP CM data formatting and parsing > functions > > to be part of ib_cm. The following patch will utilize the new > knowledge to > > look-up the appropriate namespace. Each namespace maintains an > independent > > table of RDMA CM service IDs, allowing isolation and separation > between the > > network namespaces. > > > > When creating a new incoming connection ID, the code in > cm_save_ip_info can no > > longer rely on the listener's private data to find the port number, so > it > > reads it from the requested service ID. This required saving the > service ID in > > cm_format_paths_from_req. > > > > Signed-off-by: Guy Shapiro <guysh@...lanox.com> > > Signed-off-by: Haggai Eran <haggaie@...lanox.com> > > Signed-off-by: Yotam Kenneth <yotamke@...lanox.com> > > Signed-off-by: Shachar Raindel <raindel@...lanox.com> > > > > --- > > drivers/infiniband/core/cm.c | 167 > ++++++++++++++++++++++++++++++++++++++++++ > > drivers/infiniband/core/cma.c | 166 +++++---------------------------- > -------- > > include/rdma/ib_cm.h | 46 ++++++++++++ > > 3 files changed, 231 insertions(+), 148 deletions(-) > > > > diff --git a/drivers/infiniband/core/cm.c > b/drivers/infiniband/core/cm.c > > index 5a45cb76c43e..5cc1a4aa9728 100644 > > --- a/drivers/infiniband/core/cm.c > > +++ b/drivers/infiniband/core/cm.c > > @@ -51,6 +51,7 @@ > > > > #include <rdma/ib_cache.h> > > #include <rdma/ib_cm.h> > > +#include <rdma/ib.h> > > #include "cm_msgs.h" > > > > MODULE_AUTHOR("Sean Hefty"); > > @@ -701,6 +702,170 @@ static void cm_reject_sidr_req(struct > cm_id_private *cm_id_priv, > > ib_send_cm_sidr_rep(&cm_id_priv->id, ¶m); > > } > > > > +static inline u8 cm_get_ip_ver(struct cm_hdr *hdr) > > +{ > > + return hdr->ip_version >> 4; > > +} > > + > > +void cm_set_ip_ver(struct cm_hdr *hdr, u8 ip_ver) > > +{ > > + hdr->ip_version = (ip_ver << 4) | (hdr->ip_version & 0xF); > > +} > > +EXPORT_SYMBOL(cm_set_ip_ver); > > + > > That can be defined as an inline function in header. > While you are technically correct (the function is less than 3 lines, and therefore you can inline it), the performance gain from inlining it is negligible. At the same time, having a nice block where all of the RDMA IP CM protocol serialization lives make the code much easier to maintain. > > +int cm_format_hdr(void *hdr, int family, > > + struct sockaddr *src_addr, > > + struct sockaddr *dst_addr) > > +{ > > + struct cm_hdr *cm_hdr; > > + > > + cm_hdr = hdr; > > + cm_hdr->cm_version = RDMA_IP_CM_VERSION; > > + if (family == AF_INET) { > > + struct sockaddr_in *src4, *dst4; > > + > > + src4 = (struct sockaddr_in *)src_addr; > > + dst4 = (struct sockaddr_in *)dst_addr; > > + > > + cm_set_ip_ver(cm_hdr, 4); > > + cm_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr; > > + cm_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr; > > + cm_hdr->port = src4->sin_port; > > + } else if (family == AF_INET6) { > > + struct sockaddr_in6 *src6, *dst6; > > + > > + src6 = (struct sockaddr_in6 *)src_addr; > > + dst6 = (struct sockaddr_in6 *)dst_addr; > > + > > + cm_set_ip_ver(cm_hdr, 6); > > + cm_hdr->src_addr.ip6 = src6->sin6_addr; > > + cm_hdr->dst_addr.ip6 = dst6->sin6_addr; > > + cm_hdr->port = src6->sin6_port; > > + } > > + return 0; > > +} > > +EXPORT_SYMBOL(cm_format_hdr); > > + > > +static void cm_save_ib_info(struct sockaddr *src_addr, > > + struct sockaddr *dst_addr, > > + struct ib_sa_path_rec *path) > > +{ > > + struct sockaddr_ib *ib; > > + > > + if (src_addr) { > > + ib = (struct sockaddr_ib *)src_addr; > > + ib->sib_family = AF_IB; > > + ib->sib_pkey = path->pkey; > > + ib->sib_flowinfo = path->flow_label; > > + memcpy(&ib->sib_addr, &path->sgid, 16); > > + ib->sib_sid = path->service_id; > > + ib->sib_sid_mask = cpu_to_be64(0xffffffffffffffffULL); > > + ib->sib_scope_id = 0; > > + } > > + if (dst_addr) { > > + ib = (struct sockaddr_ib *)dst_addr; > > + ib->sib_family = AF_IB; > > + ib->sib_pkey = path->pkey; > > + ib->sib_flowinfo = path->flow_label; > > + memcpy(&ib->sib_addr, &path->dgid, 16); > > + } > > +} > > + > > +static void cm_save_ip6_info(struct sockaddr *src_addr, > > + struct sockaddr *dst_addr, > > + struct cm_hdr *hdr, > > + __be16 local_port) > > +{ > > + struct sockaddr_in6 *ip6; > > + > > + if (src_addr) { > > + ip6 = (struct sockaddr_in6 *)src_addr; > > + ip6->sin6_family = AF_INET6; > > + ip6->sin6_addr = hdr->dst_addr.ip6; > > + ip6->sin6_port = local_port; > > + } > > + > > + if (dst_addr) { > > + ip6 = (struct sockaddr_in6 *)dst_addr; > > + ip6->sin6_family = AF_INET6; > > + ip6->sin6_addr = hdr->src_addr.ip6; > > + ip6->sin6_port = hdr->port; > > + } > > +} > > + > > +static void cm_save_ip4_info(struct sockaddr *src_addr, > > + struct sockaddr *dst_addr, > > + struct cm_hdr *hdr, > > + __be16 local_port) > > +{ > > + struct sockaddr_in *ip4; > > + > > + if (src_addr) { > > + ip4 = (struct sockaddr_in *)src_addr; > > + ip4->sin_family = AF_INET; > > + ip4->sin_addr.s_addr = hdr->dst_addr.ip4.addr; > > + ip4->sin_port = local_port; > > + } > > + > > + if (dst_addr) { > > + ip4 = (struct sockaddr_in *)dst_addr; > > + ip4->sin_family = AF_INET; > > + ip4->sin_addr.s_addr = hdr->src_addr.ip4.addr; > > + ip4->sin_port = hdr->port; > > + } > > +} > > + > > +static __be16 cm_port_from_service_id(__be64 service_id) > > +{ > > + return htons(be64_to_cpu(service_id)); > > +} > > + > > +static int cm_save_ip_info(struct sockaddr *src_addr, > > + struct sockaddr *dst_addr, > > + struct cm_work *work) > > +{ > > + struct cm_hdr *hdr; > > + __be16 port; > > + > > + hdr = work->cm_event.private_data; > > + if (hdr->cm_version != RDMA_IP_CM_VERSION) > > + return -EINVAL; > > + > > + port = cm_port_from_service_id(work->path->service_id); > > + > > + switch (cm_get_ip_ver(hdr)) { > > + case 4: > > + cm_save_ip4_info(src_addr, dst_addr, hdr, port); > > + break; > > + case 6: > > + cm_save_ip6_info(src_addr, dst_addr, hdr, port); > > + break; > > + default: > > + return -EINVAL; > > + } > > + > > + return 0; > > +} > > + > > +int cm_save_net_info(struct sockaddr *src_addr, > > + struct sockaddr *dst_addr, > > + struct ib_cm_event *ib_event) > > +{ > > + struct cm_work *work = container_of(ib_event, struct cm_work, > cm_event); > > + > > + if ((rdma_port_get_link_layer(work->port->cm_dev->ib_device, > > + work->port->port_num) == > > + IB_LINK_LAYER_INFINIBAND) && > > + (ib_event->event == IB_CM_REQ_RECEIVED)) { > > + cm_save_ib_info(src_addr, dst_addr, > > + ib_event->param.req_rcvd.primary_path); > > + return 0; > > + } > > + > > + return cm_save_ip_info(src_addr, dst_addr, work); > > +} > > +EXPORT_SYMBOL(cm_save_net_info); > > + > > struct ib_cm_id *ib_create_cm_id(struct ib_device *device, > > ib_cm_handler cm_handler, > > void *context) > > @@ -1260,6 +1425,7 @@ static void cm_format_paths_from_req(struct > cm_req_msg *req_msg, > > primary_path->packet_life_time = > > cm_req_get_primary_local_ack_timeout(req_msg); > > primary_path->packet_life_time -= (primary_path->packet_life_time > > 0); > > + primary_path->service_id = req_msg->service_id; > > > > if (req_msg->alt_local_lid) { > > memset(alt_path, 0, sizeof *alt_path); > > @@ -1281,6 +1447,7 @@ static void cm_format_paths_from_req(struct > cm_req_msg *req_msg, > > alt_path->packet_life_time = > > cm_req_get_alt_local_ack_timeout(req_msg); > > alt_path->packet_life_time -= (alt_path->packet_life_time > > 0); > > + alt_path->service_id = req_msg->service_id; > > } > > } > > > > diff --git a/drivers/infiniband/core/cma.c > b/drivers/infiniband/core/cma.c > > index aeb2417ec928..9f6faeb1de5f 100644 > > --- a/drivers/infiniband/core/cma.c > > +++ b/drivers/infiniband/core/cma.c > > @@ -179,23 +179,8 @@ struct iboe_mcast_work { > > struct cma_multicast *mc; > > }; > > > > -union cma_ip_addr { > > - struct in6_addr ip6; > > - struct { > > - __be32 pad[3]; > > - __be32 addr; > > - } ip4; > > -}; > > > > -struct cma_hdr { > > - u8 cma_version; > > - u8 ip_version; /* IP version: 7:4 */ > > - __be16 port; > > - union cma_ip_addr src_addr; > > - union cma_ip_addr dst_addr; > > -}; > > > > -#define CMA_VERSION 0x00 > > > > static int cma_comp(struct rdma_id_private *id_priv, enum > rdma_cm_state comp) > > { > > @@ -234,16 +219,6 @@ static enum rdma_cm_state cma_exch(struct > rdma_id_private *id_priv, > > return old; > > } > > > > -static inline u8 cma_get_ip_ver(struct cma_hdr *hdr) > > -{ > > - return hdr->ip_version >> 4; > > -} > > - > > -static inline void cma_set_ip_ver(struct cma_hdr *hdr, u8 ip_ver) > > -{ > > - hdr->ip_version = (ip_ver << 4) | (hdr->ip_version & 0xF); > > -} > > - > > static void cma_attach_to_dev(struct rdma_id_private *id_priv, > > struct cma_device *cma_dev) > > { > > @@ -839,93 +814,9 @@ static inline int cma_any_port(struct sockaddr > *addr) > > return !cma_port(addr); > > } > > > > -static void cma_save_ib_info(struct rdma_cm_id *id, struct rdma_cm_id > *listen_id, > > - struct ib_sa_path_rec *path) > > -{ > > - struct sockaddr_ib *listen_ib, *ib; > > - > > - listen_ib = (struct sockaddr_ib *) &listen_id->route.addr.src_addr; > > - ib = (struct sockaddr_ib *) &id->route.addr.src_addr; > > - ib->sib_family = listen_ib->sib_family; > > - ib->sib_pkey = path->pkey; > > - ib->sib_flowinfo = path->flow_label; > > - memcpy(&ib->sib_addr, &path->sgid, 16); > > - ib->sib_sid = listen_ib->sib_sid; > > - ib->sib_sid_mask = cpu_to_be64(0xffffffffffffffffULL); > > - ib->sib_scope_id = listen_ib->sib_scope_id; > > - > > - ib = (struct sockaddr_ib *) &id->route.addr.dst_addr; > > - ib->sib_family = listen_ib->sib_family; > > - ib->sib_pkey = path->pkey; > > - ib->sib_flowinfo = path->flow_label; > > - memcpy(&ib->sib_addr, &path->dgid, 16); > > -} > > - > > -static void cma_save_ip4_info(struct rdma_cm_id *id, struct > rdma_cm_id *listen_id, > > - struct cma_hdr *hdr) > > -{ > > - struct sockaddr_in *listen4, *ip4; > > - > > - listen4 = (struct sockaddr_in *) &listen_id->route.addr.src_addr; > > - ip4 = (struct sockaddr_in *) &id->route.addr.src_addr; > > - ip4->sin_family = AF_INET; > > - ip4->sin_addr.s_addr = hdr->dst_addr.ip4.addr; > > - ip4->sin_port = listen4->sin_port; > > - > > - ip4 = (struct sockaddr_in *) &id->route.addr.dst_addr; > > - ip4->sin_family = AF_INET; > > - ip4->sin_addr.s_addr = hdr->src_addr.ip4.addr; > > - ip4->sin_port = hdr->port; > > -} > > - > > -static void cma_save_ip6_info(struct rdma_cm_id *id, struct > rdma_cm_id *listen_id, > > - struct cma_hdr *hdr) > > -{ > > - struct sockaddr_in6 *listen6, *ip6; > > - > > - listen6 = (struct sockaddr_in6 *) &listen_id->route.addr.src_addr; > > - ip6 = (struct sockaddr_in6 *) &id->route.addr.src_addr; > > - ip6->sin6_family = AF_INET6; > > - ip6->sin6_addr = hdr->dst_addr.ip6; > > - ip6->sin6_port = listen6->sin6_port; > > - > > - ip6 = (struct sockaddr_in6 *) &id->route.addr.dst_addr; > > - ip6->sin6_family = AF_INET6; > > - ip6->sin6_addr = hdr->src_addr.ip6; > > - ip6->sin6_port = hdr->port; > > -} > > - > > -static int cma_save_net_info(struct rdma_cm_id *id, struct rdma_cm_id > *listen_id, > > - struct ib_cm_event *ib_event) > > -{ > > - struct cma_hdr *hdr; > > - > > - if ((listen_id->route.addr.src_addr.ss_family == AF_IB) && > > - (ib_event->event == IB_CM_REQ_RECEIVED)) { > > - cma_save_ib_info(id, listen_id, ib_event- > >param.req_rcvd.primary_path); > > - return 0; > > - } > > - > > - hdr = ib_event->private_data; > > - if (hdr->cma_version != CMA_VERSION) > > - return -EINVAL; > > - > > - switch (cma_get_ip_ver(hdr)) { > > - case 4: > > - cma_save_ip4_info(id, listen_id, hdr); > > - break; > > - case 6: > > - cma_save_ip6_info(id, listen_id, hdr); > > - break; > > - default: > > - return -EINVAL; > > - } > > - return 0; > > -} > > - > > static inline int cma_user_data_offset(struct rdma_id_private > *id_priv) > > { > > - return cma_family(id_priv) == AF_IB ? 0 : sizeof(struct cma_hdr); > > + return cma_family(id_priv) == AF_IB ? 0 : sizeof(struct cm_hdr); > > } > > > > static void cma_cancel_route(struct rdma_id_private *id_priv) > > @@ -1195,7 +1086,9 @@ static struct rdma_id_private > *cma_new_conn_id(struct rdma_cm_id *listen_id, > > return NULL; > > > > id_priv = container_of(id, struct rdma_id_private, id); > > - if (cma_save_net_info(id, listen_id, ib_event)) > > + if (cm_save_net_info((struct sockaddr *)&id->route.addr.src_addr, > > + (struct sockaddr *)&id->route.addr.dst_addr, > > + ib_event)) > > goto err; > > > > rt = &id->route; > > @@ -1241,7 +1134,9 @@ static struct rdma_id_private > *cma_new_udp_id(struct rdma_cm_id *listen_id, > > return NULL; > > > > id_priv = container_of(id, struct rdma_id_private, id); > > - if (cma_save_net_info(id, listen_id, ib_event)) > > + if (cm_save_net_info((struct sockaddr *)&id->route.addr.src_addr, > > + (struct sockaddr *)&id->route.addr.dst_addr, > > + ib_event)) > > goto err; > > > > if (!cma_any_addr((struct sockaddr *) &id->route.addr.src_addr)) { > > @@ -1369,7 +1264,7 @@ EXPORT_SYMBOL(rdma_get_service_id); > > static void cma_set_compare_data(enum rdma_port_space ps, struct > sockaddr *addr, > > struct ib_cm_compare_data *compare) > > { > > - struct cma_hdr *cma_data, *cma_mask; > > + struct cm_hdr *cma_data, *cma_mask; > > __be32 ip4_addr; > > struct in6_addr ip6_addr; > > > > @@ -1380,8 +1275,8 @@ static void cma_set_compare_data(enum > rdma_port_space ps, struct sockaddr *addr, > > switch (addr->sa_family) { > > case AF_INET: > > ip4_addr = ((struct sockaddr_in *) addr)->sin_addr.s_addr; > > - cma_set_ip_ver(cma_data, 4); > > - cma_set_ip_ver(cma_mask, 0xF); > > + cm_set_ip_ver(cma_data, 4); > > + cm_set_ip_ver(cma_mask, 0xF); > > if (!cma_any_addr(addr)) { > > cma_data->dst_addr.ip4.addr = ip4_addr; > > cma_mask->dst_addr.ip4.addr = htonl(~0); > > @@ -1389,8 +1284,8 @@ static void cma_set_compare_data(enum > rdma_port_space ps, struct sockaddr *addr, > > break; > > case AF_INET6: > > ip6_addr = ((struct sockaddr_in6 *) addr)->sin6_addr; > > - cma_set_ip_ver(cma_data, 6); > > - cma_set_ip_ver(cma_mask, 0xF); > > + cm_set_ip_ver(cma_data, 6); > > + cm_set_ip_ver(cma_mask, 0xF); > > if (!cma_any_addr(addr)) { > > cma_data->dst_addr.ip6 = ip6_addr; > > memset(&cma_mask->dst_addr.ip6, 0xFF, > > @@ -2615,35 +2510,6 @@ err1: > > } > > EXPORT_SYMBOL(rdma_bind_addr); > > > > -static int cma_format_hdr(void *hdr, struct rdma_id_private *id_priv) > > -{ > > - struct cma_hdr *cma_hdr; > > - > > - cma_hdr = hdr; > > - cma_hdr->cma_version = CMA_VERSION; > > - if (cma_family(id_priv) == AF_INET) { > > - struct sockaddr_in *src4, *dst4; > > - > > - src4 = (struct sockaddr_in *) cma_src_addr(id_priv); > > - dst4 = (struct sockaddr_in *) cma_dst_addr(id_priv); > > - > > - cma_set_ip_ver(cma_hdr, 4); > > - cma_hdr->src_addr.ip4.addr = src4->sin_addr.s_addr; > > - cma_hdr->dst_addr.ip4.addr = dst4->sin_addr.s_addr; > > - cma_hdr->port = src4->sin_port; > > - } else if (cma_family(id_priv) == AF_INET6) { > > - struct sockaddr_in6 *src6, *dst6; > > - > > - src6 = (struct sockaddr_in6 *) cma_src_addr(id_priv); > > - dst6 = (struct sockaddr_in6 *) cma_dst_addr(id_priv); > > - > > - cma_set_ip_ver(cma_hdr, 6); > > - cma_hdr->src_addr.ip6 = src6->sin6_addr; > > - cma_hdr->dst_addr.ip6 = dst6->sin6_addr; > > - cma_hdr->port = src6->sin6_port; > > - } > > - return 0; > > -} > > > > static int cma_sidr_rep_handler(struct ib_cm_id *cm_id, > > struct ib_cm_event *ib_event) > > @@ -2731,7 +2597,9 @@ static int cma_resolve_ib_udp(struct > rdma_id_private *id_priv, > > conn_param->private_data_len); > > > > if (private_data) { > > - ret = cma_format_hdr(private_data, id_priv); > > + ret = cm_format_hdr(private_data, cma_family(id_priv), > > + cma_src_addr(id_priv), > > + cma_dst_addr(id_priv)); > > if (ret) > > goto out; > > req.private_data = private_data; > > @@ -2796,7 +2664,9 @@ static int cma_connect_ib(struct rdma_id_private > *id_priv, > > > > route = &id_priv->id.route; > > if (private_data) { > > - ret = cma_format_hdr(private_data, id_priv); > > + ret = cm_format_hdr(private_data, cma_family(id_priv), > > + cma_src_addr(id_priv), > > + cma_dst_addr(id_priv)); > > if (ret) > > goto out; > > req.private_data = private_data; > > diff --git a/include/rdma/ib_cm.h b/include/rdma/ib_cm.h > > index 0e3ff30647d5..e418a11afcfe 100644 > > --- a/include/rdma/ib_cm.h > > +++ b/include/rdma/ib_cm.h > > @@ -274,6 +274,52 @@ struct ib_cm_event { > > #define CM_LAP_ATTR_ID cpu_to_be16(0x0019) > > #define CM_APR_ATTR_ID cpu_to_be16(0x001A) > > > > +union cm_ip_addr { > > + struct in6_addr ip6; > > + struct { > > + __be32 pad[3]; > > + __be32 addr; > > + } ip4; > > +}; > > + > > +struct cm_hdr { > > + u8 cm_version; > > + u8 ip_version; /* IP version: 7:4 */ > > + __be16 port; > > + union cm_ip_addr src_addr; > > + union cm_ip_addr dst_addr; > > +}; > > + > > +#define RDMA_IP_CM_VERSION 0x00 > > + > > +/** > > + * cm_format_hdr - Fill in a cm_hdr struct according to connection > details > > + * @hdr: cm_hdr struct to fill > > + * @family: ip family of the addresses - AF_INET or AF_INTET6 > > + * @src_addr: source address of the connection > > + * @dst_addr: destination address of the connection > > + **/ > > +int cm_format_hdr(void *hdr, int family, > > + struct sockaddr *src_addr, > > + struct sockaddr *dst_addr); > > + > > +/** > > + * cm_save_net_info - saves ib connection event details > > + * @src_addr: source address of the connection > > + * @dst_addr: destination address of the connection > > + * @ib_event: ib event to take connection details from > > + **/ > > +int cm_save_net_info(struct sockaddr *src_addr, > > + struct sockaddr *dst_addr, > > + struct ib_cm_event *ib_event); > > + > > +/** > > + * cm_set_ip_ver - sets the ip version of a cm_hdr struct > > + * @hdr: cm_hdr struct to change > > + * @ip_ver: ip version to set - a 4 bit value > > + **/ > > +void cm_set_ip_ver(struct cm_hdr *hdr, u8 ip_ver); > > + > > /** > > * ib_cm_handler - User-defined callback to process communication > events. > > * @cm_id: Communication identifier associated with the reported > event. > > Every other symbols in ib_cm.h are prefixed by "ib_cm_", so I would > prefer having symbols moved from ib_cma.c to ib_cm.c be renamed, except > it would create a lot of code change ... > Sadly, ib_cm does not have such scheme for exported symbols as of time being: $ git checkout v3.19-rc6 Note: checking out 'v3.19-rc6' ... HEAD is now at 26bc420b... Linux 3.19-rc6 $ grep EXPORT drivers/infiniband/core/cm.c EXPORT_SYMBOL(ib_create_cm_id); EXPORT_SYMBOL(ib_destroy_cm_id); EXPORT_SYMBOL(ib_cm_listen); EXPORT_SYMBOL(ib_send_cm_req); EXPORT_SYMBOL(ib_send_cm_rep); EXPORT_SYMBOL(ib_send_cm_rtu); EXPORT_SYMBOL(ib_send_cm_dreq); EXPORT_SYMBOL(ib_send_cm_drep); EXPORT_SYMBOL(ib_send_cm_rej); EXPORT_SYMBOL(ib_send_cm_mra); EXPORT_SYMBOL(ib_send_cm_lap); EXPORT_SYMBOL(ib_send_cm_apr); EXPORT_SYMBOL(ib_send_cm_sidr_req); EXPORT_SYMBOL(ib_send_cm_sidr_rep); EXPORT_SYMBOL(ib_cm_notify); EXPORT_SYMBOL(ib_cm_init_qp_attr); EXPORT_SYMBOL(cm_class); I feel that going through changing the names will not be productive, especially considering the inconsistency that already exists in the ib_cm exported symbols names. On the other hand, patches to fix this naming inconsistency in ib_cm are welcome ;) Thanks, --Shachar
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