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Date: Sun, 01 Feb 2015 13:55:59 +0100
From: Yann Droneaud <ydroneaud@...eya.com>
To: Shachar Raindel <raindel@...lanox.com>
Cc: roland@...nel.org, sean.hefty@...el.com,
linux-rdma@...r.kernel.org, netdev@...r.kernel.org,
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
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.
> +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 ...
Regards.
--
Yann Droneaud
OPTEYA
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