diff options
Diffstat (limited to 'drivers/infiniband/core')
| -rw-r--r-- | drivers/infiniband/core/Makefile | 2 | ||||
| -rw-r--r-- | drivers/infiniband/core/cma.c | 3 | ||||
| -rw-r--r-- | drivers/infiniband/core/iwpm_msg.c | 685 | ||||
| -rw-r--r-- | drivers/infiniband/core/iwpm_util.c | 607 | ||||
| -rw-r--r-- | drivers/infiniband/core/iwpm_util.h | 238 | ||||
| -rw-r--r-- | drivers/infiniband/core/netlink.c | 18 | ||||
| -rw-r--r-- | drivers/infiniband/core/sa_query.c | 2 | ||||
| -rw-r--r-- | drivers/infiniband/core/sysfs.c | 85 | ||||
| -rw-r--r-- | drivers/infiniband/core/user_mad.c | 75 | ||||
| -rw-r--r-- | drivers/infiniband/core/verbs.c | 8 |
10 files changed, 1643 insertions, 80 deletions
diff --git a/drivers/infiniband/core/Makefile b/drivers/infiniband/core/Makefile index 3ab3865544b..ffd0af6734a 100644 --- a/drivers/infiniband/core/Makefile +++ b/drivers/infiniband/core/Makefile @@ -18,7 +18,7 @@ ib_sa-y := sa_query.o multicast.o ib_cm-y := cm.o -iw_cm-y := iwcm.o +iw_cm-y := iwcm.o iwpm_util.o iwpm_msg.o rdma_cm-y := cma.o diff --git a/drivers/infiniband/core/cma.c b/drivers/infiniband/core/cma.c index 42c3058e6e9..d570030d899 100644 --- a/drivers/infiniband/core/cma.c +++ b/drivers/infiniband/core/cma.c @@ -3607,7 +3607,8 @@ static int cma_get_id_stats(struct sk_buff *skb, struct netlink_callback *cb) id_stats = ibnl_put_msg(skb, &nlh, cb->nlh->nlmsg_seq, sizeof *id_stats, RDMA_NL_RDMA_CM, - RDMA_NL_RDMA_CM_ID_STATS); + RDMA_NL_RDMA_CM_ID_STATS, + NLM_F_MULTI); if (!id_stats) goto out; diff --git a/drivers/infiniband/core/iwpm_msg.c b/drivers/infiniband/core/iwpm_msg.c new file mode 100644 index 00000000000..b85ddbc979e --- /dev/null +++ b/drivers/infiniband/core/iwpm_msg.c @@ -0,0 +1,685 @@ +/* + * Copyright (c) 2014 Intel Corporation. All rights reserved. + * Copyright (c) 2014 Chelsio, Inc. All rights reserved. + * + * This software is available to you under a choice of one of two + * licenses. You may choose to be licensed under the terms of the GNU + * General Public License (GPL) Version 2, available from the file + * COPYING in the main directory of this source tree, or the + * OpenIB.org BSD license below: + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * - Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * - Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +#include "iwpm_util.h" + +static const char iwpm_ulib_name[] = "iWarpPortMapperUser"; +static int iwpm_ulib_version = 3; +static int iwpm_user_pid = IWPM_PID_UNDEFINED; +static atomic_t echo_nlmsg_seq; + +int iwpm_valid_pid(void) +{ + return iwpm_user_pid > 0; +} +EXPORT_SYMBOL(iwpm_valid_pid); + +/* + * iwpm_register_pid - Send a netlink query to user space + * for the iwarp port mapper pid + * + * nlmsg attributes: + * [IWPM_NLA_REG_PID_SEQ] + * [IWPM_NLA_REG_IF_NAME] + * [IWPM_NLA_REG_IBDEV_NAME] + * [IWPM_NLA_REG_ULIB_NAME] + */ +int iwpm_register_pid(struct iwpm_dev_data *pm_msg, u8 nl_client) +{ + struct sk_buff *skb = NULL; + struct iwpm_nlmsg_request *nlmsg_request = NULL; + struct nlmsghdr *nlh; + u32 msg_seq; + const char *err_str = ""; + int ret = -EINVAL; + + if (!iwpm_valid_client(nl_client)) { + err_str = "Invalid port mapper client"; + goto pid_query_error; + } + if (iwpm_registered_client(nl_client)) + return 0; + skb = iwpm_create_nlmsg(RDMA_NL_IWPM_REG_PID, &nlh, nl_client); + if (!skb) { + err_str = "Unable to create a nlmsg"; + goto pid_query_error; + } + nlh->nlmsg_seq = iwpm_get_nlmsg_seq(); + nlmsg_request = iwpm_get_nlmsg_request(nlh->nlmsg_seq, nl_client, GFP_KERNEL); + if (!nlmsg_request) { + err_str = "Unable to allocate netlink request"; + goto pid_query_error; + } + msg_seq = atomic_read(&echo_nlmsg_seq); + + /* fill in the pid request message */ + err_str = "Unable to put attribute of the nlmsg"; + ret = ibnl_put_attr(skb, nlh, sizeof(u32), &msg_seq, IWPM_NLA_REG_PID_SEQ); + if (ret) + goto pid_query_error; + ret = ibnl_put_attr(skb, nlh, IWPM_IFNAME_SIZE, + pm_msg->if_name, IWPM_NLA_REG_IF_NAME); + if (ret) + goto pid_query_error; + ret = ibnl_put_attr(skb, nlh, IWPM_DEVNAME_SIZE, + pm_msg->dev_name, IWPM_NLA_REG_IBDEV_NAME); + if (ret) + goto pid_query_error; + ret = ibnl_put_attr(skb, nlh, IWPM_ULIBNAME_SIZE, + (char *)iwpm_ulib_name, IWPM_NLA_REG_ULIB_NAME); + if (ret) + goto pid_query_error; + + pr_debug("%s: Multicasting a nlmsg (dev = %s ifname = %s iwpm = %s)\n", + __func__, pm_msg->dev_name, pm_msg->if_name, iwpm_ulib_name); + + ret = ibnl_multicast(skb, nlh, RDMA_NL_GROUP_IWPM, GFP_KERNEL); + if (ret) { + skb = NULL; /* skb is freed in the netlink send-op handling */ + iwpm_set_registered(nl_client, 1); + iwpm_user_pid = IWPM_PID_UNAVAILABLE; + err_str = "Unable to send a nlmsg"; + goto pid_query_error; + } + nlmsg_request->req_buffer = pm_msg; + ret = iwpm_wait_complete_req(nlmsg_request); + return ret; +pid_query_error: + pr_info("%s: %s (client = %d)\n", __func__, err_str, nl_client); + if (skb) + dev_kfree_skb(skb); + if (nlmsg_request) + iwpm_free_nlmsg_request(&nlmsg_request->kref); + return ret; +} +EXPORT_SYMBOL(iwpm_register_pid); + +/* + * iwpm_add_mapping - Send a netlink add mapping message + * to the port mapper + * nlmsg attributes: + * [IWPM_NLA_MANAGE_MAPPING_SEQ] + * [IWPM_NLA_MANAGE_ADDR] + */ +int iwpm_add_mapping(struct iwpm_sa_data *pm_msg, u8 nl_client) +{ + struct sk_buff *skb = NULL; + struct iwpm_nlmsg_request *nlmsg_request = NULL; + struct nlmsghdr *nlh; + u32 msg_seq; + const char *err_str = ""; + int ret = -EINVAL; + + if (!iwpm_valid_client(nl_client)) { + err_str = "Invalid port mapper client"; + goto add_mapping_error; + } + if (!iwpm_registered_client(nl_client)) { + err_str = "Unregistered port mapper client"; + goto add_mapping_error; + } + if (!iwpm_valid_pid()) + return 0; + skb = iwpm_create_nlmsg(RDMA_NL_IWPM_ADD_MAPPING, &nlh, nl_client); + if (!skb) { + err_str = "Unable to create a nlmsg"; + goto add_mapping_error; + } + nlh->nlmsg_seq = iwpm_get_nlmsg_seq(); + nlmsg_request = iwpm_get_nlmsg_request(nlh->nlmsg_seq, nl_client, GFP_KERNEL); + if (!nlmsg_request) { + err_str = "Unable to allocate netlink request"; + goto add_mapping_error; + } + msg_seq = atomic_read(&echo_nlmsg_seq); + /* fill in the add mapping message */ + err_str = "Unable to put attribute of the nlmsg"; + ret = ibnl_put_attr(skb, nlh, sizeof(u32), &msg_seq, + IWPM_NLA_MANAGE_MAPPING_SEQ); + if (ret) + goto add_mapping_error; + ret = ibnl_put_attr(skb, nlh, sizeof(struct sockaddr_storage), + &pm_msg->loc_addr, IWPM_NLA_MANAGE_ADDR); + if (ret) + goto add_mapping_error; + nlmsg_request->req_buffer = pm_msg; + + ret = ibnl_unicast(skb, nlh, iwpm_user_pid); + if (ret) { + skb = NULL; /* skb is freed in the netlink send-op handling */ + iwpm_user_pid = IWPM_PID_UNDEFINED; + err_str = "Unable to send a nlmsg"; + goto add_mapping_error; + } + ret = iwpm_wait_complete_req(nlmsg_request); + return ret; +add_mapping_error: + pr_info("%s: %s (client = %d)\n", __func__, err_str, nl_client); + if (skb) + dev_kfree_skb(skb); + if (nlmsg_request) + iwpm_free_nlmsg_request(&nlmsg_request->kref); + return ret; +} +EXPORT_SYMBOL(iwpm_add_mapping); + +/* + * iwpm_add_and_query_mapping - Send a netlink add and query + * mapping message to the port mapper + * nlmsg attributes: + * [IWPM_NLA_QUERY_MAPPING_SEQ] + * [IWPM_NLA_QUERY_LOCAL_ADDR] + * [IWPM_NLA_QUERY_REMOTE_ADDR] + */ +int iwpm_add_and_query_mapping(struct iwpm_sa_data *pm_msg, u8 nl_client) +{ + struct sk_buff *skb = NULL; + struct iwpm_nlmsg_request *nlmsg_request = NULL; + struct nlmsghdr *nlh; + u32 msg_seq; + const char *err_str = ""; + int ret = -EINVAL; + + if (!iwpm_valid_client(nl_client)) { + err_str = "Invalid port mapper client"; + goto query_mapping_error; + } + if (!iwpm_registered_client(nl_client)) { + err_str = "Unregistered port mapper client"; + goto query_mapping_error; + } + if (!iwpm_valid_pid()) + return 0; + ret = -ENOMEM; + skb = iwpm_create_nlmsg(RDMA_NL_IWPM_QUERY_MAPPING, &nlh, nl_client); + if (!skb) { + err_str = "Unable to create a nlmsg"; + goto query_mapping_error; + } + nlh->nlmsg_seq = iwpm_get_nlmsg_seq(); + nlmsg_request = iwpm_get_nlmsg_request(nlh->nlmsg_seq, + nl_client, GFP_KERNEL); + if (!nlmsg_request) { + err_str = "Unable to allocate netlink request"; + goto query_mapping_error; + } + msg_seq = atomic_read(&echo_nlmsg_seq); + + /* fill in the query message */ + err_str = "Unable to put attribute of the nlmsg"; + ret = ibnl_put_attr(skb, nlh, sizeof(u32), &msg_seq, + IWPM_NLA_QUERY_MAPPING_SEQ); + if (ret) + goto query_mapping_error; + ret = ibnl_put_attr(skb, nlh, sizeof(struct sockaddr_storage), + &pm_msg->loc_addr, IWPM_NLA_QUERY_LOCAL_ADDR); + if (ret) + goto query_mapping_error; + ret = ibnl_put_attr(skb, nlh, sizeof(struct sockaddr_storage), + &pm_msg->rem_addr, IWPM_NLA_QUERY_REMOTE_ADDR); + if (ret) + goto query_mapping_error; + nlmsg_request->req_buffer = pm_msg; + + ret = ibnl_unicast(skb, nlh, iwpm_user_pid); + if (ret) { + skb = NULL; /* skb is freed in the netlink send-op handling */ + err_str = "Unable to send a nlmsg"; + goto query_mapping_error; + } + ret = iwpm_wait_complete_req(nlmsg_request); + return ret; +query_mapping_error: + pr_info("%s: %s (client = %d)\n", __func__, err_str, nl_client); + if (skb) + dev_kfree_skb(skb); + if (nlmsg_request) + iwpm_free_nlmsg_request(&nlmsg_request->kref); + return ret; +} +EXPORT_SYMBOL(iwpm_add_and_query_mapping); + +/* + * iwpm_remove_mapping - Send a netlink remove mapping message + * to the port mapper + * nlmsg attributes: + * [IWPM_NLA_MANAGE_MAPPING_SEQ] + * [IWPM_NLA_MANAGE_ADDR] + */ +int iwpm_remove_mapping(struct sockaddr_storage *local_addr, u8 nl_client) +{ + struct sk_buff *skb = NULL; + struct nlmsghdr *nlh; + u32 msg_seq; + const char *err_str = ""; + int ret = -EINVAL; + + if (!iwpm_valid_client(nl_client)) { + err_str = "Invalid port mapper client"; + goto remove_mapping_error; + } + if (!iwpm_registered_client(nl_client)) { + err_str = "Unregistered port mapper client"; + goto remove_mapping_error; + } + if (!iwpm_valid_pid()) + return 0; + skb = iwpm_create_nlmsg(RDMA_NL_IWPM_REMOVE_MAPPING, &nlh, nl_client); + if (!skb) { + ret = -ENOMEM; + err_str = "Unable to create a nlmsg"; + goto remove_mapping_error; + } + msg_seq = atomic_read(&echo_nlmsg_seq); + nlh->nlmsg_seq = iwpm_get_nlmsg_seq(); + err_str = "Unable to put attribute of the nlmsg"; + ret = ibnl_put_attr(skb, nlh, sizeof(u32), &msg_seq, + IWPM_NLA_MANAGE_MAPPING_SEQ); + if (ret) + goto remove_mapping_error; + ret = ibnl_put_attr(skb, nlh, sizeof(struct sockaddr_storage), + local_addr, IWPM_NLA_MANAGE_ADDR); + if (ret) + goto remove_mapping_error; + + ret = ibnl_unicast(skb, nlh, iwpm_user_pid); + if (ret) { + skb = NULL; /* skb is freed in the netlink send-op handling */ + iwpm_user_pid = IWPM_PID_UNDEFINED; + err_str = "Unable to send a nlmsg"; + goto remove_mapping_error; + } + iwpm_print_sockaddr(local_addr, + "remove_mapping: Local sockaddr:"); + return 0; +remove_mapping_error: + pr_info("%s: %s (client = %d)\n", __func__, err_str, nl_client); + if (skb) + dev_kfree_skb_any(skb); + return ret; +} +EXPORT_SYMBOL(iwpm_remove_mapping); + +/* netlink attribute policy for the received response to register pid request */ +static const struct nla_policy resp_reg_policy[IWPM_NLA_RREG_PID_MAX] = { + [IWPM_NLA_RREG_PID_SEQ] = { .type = NLA_U32 }, + [IWPM_NLA_RREG_IBDEV_NAME] = { .type = NLA_STRING, + .len = IWPM_DEVNAME_SIZE - 1 }, + [IWPM_NLA_RREG_ULIB_NAME] = { .type = NLA_STRING, + .len = IWPM_ULIBNAME_SIZE - 1 }, + [IWPM_NLA_RREG_ULIB_VER] = { .type = NLA_U16 }, + [IWPM_NLA_RREG_PID_ERR] = { .type = NLA_U16 } +}; + +/* + * iwpm_register_pid_cb - Process a port mapper response to + * iwpm_register_pid() + */ +int iwpm_register_pid_cb(struct sk_buff *skb, struct netlink_callback *cb) +{ + struct iwpm_nlmsg_request *nlmsg_request = NULL; + struct nlattr *nltb[IWPM_NLA_RREG_PID_MAX]; + struct iwpm_dev_data *pm_msg; + char *dev_name, *iwpm_name; + u32 msg_seq; + u8 nl_client; + u16 iwpm_version; + const char *msg_type = "Register Pid response"; + + if (iwpm_parse_nlmsg(cb, IWPM_NLA_RREG_PID_MAX, + resp_reg_policy, nltb, msg_type)) + return -EINVAL; + + msg_seq = nla_get_u32(nltb[IWPM_NLA_RREG_PID_SEQ]); + nlmsg_request = iwpm_find_nlmsg_request(msg_seq); + if (!nlmsg_request) { + pr_info("%s: Could not find a matching request (seq = %u)\n", + __func__, msg_seq); + return -EINVAL; + } + pm_msg = nlmsg_request->req_buffer; + nl_client = nlmsg_request->nl_client; + dev_name = (char *)nla_data(nltb[IWPM_NLA_RREG_IBDEV_NAME]); + iwpm_name = (char *)nla_data(nltb[IWPM_NLA_RREG_ULIB_NAME]); + iwpm_version = nla_get_u16(nltb[IWPM_NLA_RREG_ULIB_VER]); + + /* check device name, ulib name and version */ + if (strcmp(pm_msg->dev_name, dev_name) || + strcmp(iwpm_ulib_name, iwpm_name) || + iwpm_version != iwpm_ulib_version) { + + pr_info("%s: Incorrect info (dev = %s name = %s version = %d)\n", + __func__, dev_name, iwpm_name, iwpm_version); + nlmsg_request->err_code = IWPM_USER_LIB_INFO_ERR; + goto register_pid_response_exit; + } + iwpm_user_pid = cb->nlh->nlmsg_pid; + atomic_set(&echo_nlmsg_seq, cb->nlh->nlmsg_seq); + pr_debug("%s: iWarp Port Mapper (pid = %d) is available!\n", + __func__, iwpm_user_pid); + if (iwpm_valid_client(nl_client)) + iwpm_set_registered(nl_client, 1); +register_pid_response_exit: + nlmsg_request->request_done = 1; + /* always for found nlmsg_request */ + kref_put(&nlmsg_request->kref, iwpm_free_nlmsg_request); + barrier(); + wake_up(&nlmsg_request->waitq); + return 0; +} +EXPORT_SYMBOL(iwpm_register_pid_cb); + +/* netlink attribute policy for the received response to add mapping request */ +static const struct nla_policy resp_add_policy[IWPM_NLA_RMANAGE_MAPPING_MAX] = { + [IWPM_NLA_MANAGE_MAPPING_SEQ] = { .type = NLA_U32 }, + [IWPM_NLA_MANAGE_ADDR] = { .len = sizeof(struct sockaddr_storage) }, + [IWPM_NLA_MANAGE_MAPPED_LOC_ADDR] = { .len = sizeof(struct sockaddr_storage) }, + [IWPM_NLA_RMANAGE_MAPPING_ERR] = { .type = NLA_U16 } +}; + +/* + * iwpm_add_mapping_cb - Process a port mapper response to + * iwpm_add_mapping() + */ +int iwpm_add_mapping_cb(struct sk_buff *skb, struct netlink_callback *cb) +{ + struct iwpm_sa_data *pm_msg; + struct iwpm_nlmsg_request *nlmsg_request = NULL; + struct nlattr *nltb[IWPM_NLA_RMANAGE_MAPPING_MAX]; + struct sockaddr_storage *local_sockaddr; + struct sockaddr_storage *mapped_sockaddr; + const char *msg_type; + u32 msg_seq; + + msg_type = "Add Mapping response"; + if (iwpm_parse_nlmsg(cb, IWPM_NLA_RMANAGE_MAPPING_MAX, + resp_add_policy, nltb, msg_type)) + return -EINVAL; + + atomic_set(&echo_nlmsg_seq, cb->nlh->nlmsg_seq); + + msg_seq = nla_get_u32(nltb[IWPM_NLA_MANAGE_MAPPING_SEQ]); + nlmsg_request = iwpm_find_nlmsg_request(msg_seq); + if (!nlmsg_request) { + pr_info("%s: Could not find a matching request (seq = %u)\n", + __func__, msg_seq); + return -EINVAL; + } + pm_msg = nlmsg_request->req_buffer; + local_sockaddr = (struct sockaddr_storage *) + nla_data(nltb[IWPM_NLA_MANAGE_ADDR]); + mapped_sockaddr = (struct sockaddr_storage *) + nla_data(nltb[IWPM_NLA_MANAGE_MAPPED_LOC_ADDR]); + + if (iwpm_compare_sockaddr(local_sockaddr, &pm_msg->loc_addr)) { + nlmsg_request->err_code = IWPM_USER_LIB_INFO_ERR; + goto add_mapping_response_exit; + } + if (mapped_sockaddr->ss_family != local_sockaddr->ss_family) { + pr_info("%s: Sockaddr family doesn't match the requested one\n", + __func__); + nlmsg_request->err_code = IWPM_USER_LIB_INFO_ERR; + goto add_mapping_response_exit; + } + memcpy(&pm_msg->mapped_loc_addr, mapped_sockaddr, + sizeof(*mapped_sockaddr)); + iwpm_print_sockaddr(&pm_msg->loc_addr, + "add_mapping: Local sockaddr:"); + iwpm_print_sockaddr(&pm_msg->mapped_loc_addr, + "add_mapping: Mapped local sockaddr:"); + +add_mapping_response_exit: + nlmsg_request->request_done = 1; + /* always for found request */ + kref_put(&nlmsg_request->kref, iwpm_free_nlmsg_request); + barrier(); + wake_up(&nlmsg_request->waitq); + return 0; +} +EXPORT_SYMBOL(iwpm_add_mapping_cb); + +/* netlink attribute policy for the response to add and query mapping request */ +static const struct nla_policy resp_query_policy[IWPM_NLA_RQUERY_MAPPING_MAX] = { + [IWPM_NLA_QUERY_MAPPING_SEQ] = { .type = NLA_U32 }, + [IWPM_NLA_QUERY_LOCAL_ADDR] = { .len = sizeof(struct sockaddr_storage) }, + [IWPM_NLA_QUERY_REMOTE_ADDR] = { .len = sizeof(struct sockaddr_storage) }, + [IWPM_NLA_RQUERY_MAPPED_LOC_ADDR] = { .len = sizeof(struct sockaddr_storage) }, + [IWPM_NLA_RQUERY_MAPPED_REM_ADDR] = { .len = sizeof(struct sockaddr_storage) }, + [IWPM_NLA_RQUERY_MAPPING_ERR] = { .type = NLA_U16 } +}; + +/* + * iwpm_add_and_query_mapping_cb - Process a port mapper response to + * iwpm_add_and_query_mapping() + */ +int iwpm_add_and_query_mapping_cb(struct sk_buff *skb, + struct netlink_callback *cb) +{ + struct iwpm_sa_data *pm_msg; + struct iwpm_nlmsg_request *nlmsg_request = NULL; + struct nlattr *nltb[IWPM_NLA_RQUERY_MAPPING_MAX]; + struct sockaddr_storage *local_sockaddr, *remote_sockaddr; + struct sockaddr_storage *mapped_loc_sockaddr, *mapped_rem_sockaddr; + const char *msg_type; + u32 msg_seq; + u16 err_code; + + msg_type = "Query Mapping response"; + if (iwpm_parse_nlmsg(cb, IWPM_NLA_RQUERY_MAPPING_MAX, + resp_query_policy, nltb, msg_type)) + return -EINVAL; + atomic_set(&echo_nlmsg_seq, cb->nlh->nlmsg_seq); + + msg_seq = nla_get_u32(nltb[IWPM_NLA_QUERY_MAPPING_SEQ]); + nlmsg_request = iwpm_find_nlmsg_request(msg_seq); + if (!nlmsg_request) { + pr_info("%s: Could not find a matching request (seq = %u)\n", + __func__, msg_seq); + return -EINVAL; + } + pm_msg = nlmsg_request->req_buffer; + local_sockaddr = (struct sockaddr_storage *) + nla_data(nltb[IWPM_NLA_QUERY_LOCAL_ADDR]); + remote_sockaddr = (struct sockaddr_storage *) + nla_data(nltb[IWPM_NLA_QUERY_REMOTE_ADDR]); + mapped_loc_sockaddr = (struct sockaddr_storage *) + nla_data(nltb[IWPM_NLA_RQUERY_MAPPED_LOC_ADDR]); + mapped_rem_sockaddr = (struct sockaddr_storage *) + nla_data(nltb[IWPM_NLA_RQUERY_MAPPED_REM_ADDR]); + + err_code = nla_get_u16(nltb[IWPM_NLA_RQUERY_MAPPING_ERR]); + if (err_code == IWPM_REMOTE_QUERY_REJECT) { + pr_info("%s: Received a Reject (pid = %u, echo seq = %u)\n", + __func__, cb->nlh->nlmsg_pid, msg_seq); + nlmsg_request->err_code = IWPM_REMOTE_QUERY_REJECT; + } + if (iwpm_compare_sockaddr(local_sockaddr, &pm_msg->loc_addr) || + iwpm_compare_sockaddr(remote_sockaddr, &pm_msg->rem_addr)) { + pr_info("%s: Incorrect local sockaddr\n", __func__); + nlmsg_request->err_code = IWPM_USER_LIB_INFO_ERR; + goto query_mapping_response_exit; + } + if (mapped_loc_sockaddr->ss_family != local_sockaddr->ss_family || + mapped_rem_sockaddr->ss_family != remote_sockaddr->ss_family) { + pr_info("%s: Sockaddr family doesn't match the requested one\n", + __func__); + nlmsg_request->err_code = IWPM_USER_LIB_INFO_ERR; + goto query_mapping_response_exit; + } + memcpy(&pm_msg->mapped_loc_addr, mapped_loc_sockaddr, + sizeof(*mapped_loc_sockaddr)); + memcpy(&pm_msg->mapped_rem_addr, mapped_rem_sockaddr, + sizeof(*mapped_rem_sockaddr)); + + iwpm_print_sockaddr(&pm_msg->loc_addr, + "query_mapping: Local sockaddr:"); + iwpm_print_sockaddr(&pm_msg->mapped_loc_addr, + "query_mapping: Mapped local sockaddr:"); + iwpm_print_sockaddr(&pm_msg->rem_addr, + "query_mapping: Remote sockaddr:"); + iwpm_print_sockaddr(&pm_msg->mapped_rem_addr, + "query_mapping: Mapped remote sockaddr:"); +query_mapping_response_exit: + nlmsg_request->request_done = 1; + /* always for found request */ + kref_put(&nlmsg_request->kref, iwpm_free_nlmsg_request); + barrier(); + wake_up(&nlmsg_request->waitq); + return 0; +} +EXPORT_SYMBOL(iwpm_add_and_query_mapping_cb); + +/* netlink attribute policy for the received request for mapping info */ +static const struct nla_policy resp_mapinfo_policy[IWPM_NLA_MAPINFO_REQ_MAX] = { + [IWPM_NLA_MAPINFO_ULIB_NAME] = { .type = NLA_STRING, + .len = IWPM_ULIBNAME_SIZE - 1 }, + [IWPM_NLA_MAPINFO_ULIB_VER] = { .type = NLA_U16 } +}; + +/* + * iwpm_mapping_info_cb - Process a port mapper request for mapping info + */ +int iwpm_mapping_info_cb(struct sk_buff *skb, struct netlink_callback *cb) +{ + struct nlattr *nltb[IWPM_NLA_MAPINFO_REQ_MAX]; + const char *msg_type = "Mapping Info response"; + int iwpm_pid; + u8 nl_client; + char *iwpm_name; + u16 iwpm_version; + int ret = -EINVAL; + + if (iwpm_parse_nlmsg(cb, IWPM_NLA_MAPINFO_REQ_MAX, + resp_mapinfo_policy, nltb, msg_type)) { + pr_info("%s: Unable to parse nlmsg\n", __func__); + return ret; + } + iwpm_name = (char *)nla_data(nltb[IWPM_NLA_MAPINFO_ULIB_NAME]); + iwpm_version = nla_get_u16(nltb[IWPM_NLA_MAPINFO_ULIB_VER]); + if (strcmp(iwpm_ulib_name, iwpm_name) || + iwpm_version != iwpm_ulib_version) { + pr_info("%s: Invalid port mapper name = %s version = %d\n", + __func__, iwpm_name, iwpm_version); + return ret; + } + nl_client = RDMA_NL_GET_CLIENT(cb->nlh->nlmsg_type); + if (!iwpm_valid_client(nl_client)) { + pr_info("%s: Invalid port mapper client = %d\n", + __func__, nl_client); + return ret; + } + iwpm_set_registered(nl_client, 0); + atomic_set(&echo_nlmsg_seq, cb->nlh->nlmsg_seq); + if (!iwpm_mapinfo_available()) + return 0; + iwpm_pid = cb->nlh->nlmsg_pid; + pr_debug("%s: iWarp Port Mapper (pid = %d) is available!\n", + __func__, iwpm_pid); + ret = iwpm_send_mapinfo(nl_client, iwpm_pid); + return ret; +} +EXPORT_SYMBOL(iwpm_mapping_info_cb); + +/* netlink attribute policy for the received mapping info ack */ +static const struct nla_policy ack_mapinfo_policy[IWPM_NLA_MAPINFO_NUM_MAX] = { + [IWPM_NLA_MAPINFO_SEQ] = { .type = NLA_U32 }, + [IWPM_NLA_MAPINFO_SEND_NUM] = { .type = NLA_U32 }, + [IWPM_NLA_MAPINFO_ACK_NUM] = { .type = NLA_U32 } +}; + +/* + * iwpm_ack_mapping_info_cb - Process a port mapper ack for + * the provided mapping info records + */ +int iwpm_ack_mapping_info_cb(struct sk_buff *skb, struct netlink_callback *cb) +{ + struct nlattr *nltb[IWPM_NLA_MAPINFO_NUM_MAX]; + u32 mapinfo_send, mapinfo_ack; + const char *msg_type = "Mapping Info Ack"; + + if (iwpm_parse_nlmsg(cb, IWPM_NLA_MAPINFO_NUM_MAX, + ack_mapinfo_policy, nltb, msg_type)) + return -EINVAL; + mapinfo_send = nla_get_u32(nltb[IWPM_NLA_MAPINFO_SEND_NUM]); + mapinfo_ack = nla_get_u32(nltb[IWPM_NLA_MAPINFO_ACK_NUM]); + if (mapinfo_ack != mapinfo_send) + pr_info("%s: Invalid mapinfo number (sent = %u ack-ed = %u)\n", + __func__, mapinfo_send, mapinfo_ack); + atomic_set(&echo_nlmsg_seq, cb->nlh->nlmsg_seq); + return 0; +} +EXPORT_SYMBOL(iwpm_ack_mapping_info_cb); + +/* netlink attribute policy for the received port mapper error message */ +static const struct nla_policy map_error_policy[IWPM_NLA_ERR_MAX] = { + [IWPM_NLA_ERR_SEQ] = { .type = NLA_U32 }, + [IWPM_NLA_ERR_CODE] = { .type = NLA_U16 }, +}; + +/* + * iwpm_mapping_error_cb - Process a port mapper error message + */ +int iwpm_mapping_error_cb(struct sk_buff *skb, struct netlink_callback *cb) +{ + struct iwpm_nlmsg_request *nlmsg_request = NULL; + int nl_client = RDMA_NL_GET_CLIENT(cb->nlh->nlmsg_type); + struct nlattr *nltb[IWPM_NLA_ERR_MAX]; + u32 msg_seq; + u16 err_code; + const char *msg_type = "Mapping Error Msg"; + + if (iwpm_parse_nlmsg(cb, IWPM_NLA_ERR_MAX, + map_error_policy, nltb, msg_type)) + return -EINVAL; + + msg_seq = nla_get_u32(nltb[IWPM_NLA_ERR_SEQ]); + err_code = nla_get_u16(nltb[IWPM_NLA_ERR_CODE]); + pr_info("%s: Received msg seq = %u err code = %u client = %d\n", + __func__, msg_seq, err_code, nl_client); + /* look for nlmsg_request */ + nlmsg_request = iwpm_find_nlmsg_request(msg_seq); + if (!nlmsg_request) { + /* not all errors have associated requests */ + pr_debug("Could not find matching req (seq = %u)\n", msg_seq); + return 0; + } + atomic_set(&echo_nlmsg_seq, cb->nlh->nlmsg_seq); + nlmsg_request->err_code = err_code; + nlmsg_request->request_done = 1; + /* always for found request */ + kref_put(&nlmsg_request->kref, iwpm_free_nlmsg_request); + barrier(); + wake_up(&nlmsg_request->waitq); + return 0; +} +EXPORT_SYMBOL(iwpm_mapping_error_cb); diff --git a/drivers/infiniband/core/iwpm_util.c b/drivers/infiniband/core/iwpm_util.c new file mode 100644 index 00000000000..69e9f84c160 --- /dev/null +++ b/drivers/infiniband/core/iwpm_util.c @@ -0,0 +1,607 @@ +/* + * Copyright (c) 2014 Chelsio, Inc. All rights reserved. + * Copyright (c) 2014 Intel Corporation. All rights reserved. + * + * This software is available to you under a choice of one of two + * licenses. You may choose to be licensed under the terms of the GNU + * General Public License (GPL) Version 2, available from the file + * COPYING in the main directory of this source tree, or the + * OpenIB.org BSD license below: + * + * Redistribution and use in source and binary forms, with or + * without modification, are permitted provided that the following + * conditions are met: + * + * - Redistributions of source code must retain the above + * copyright notice, this list of conditions and the following + * disclaimer. + * + * - Redistributions in binary form must reproduce the above + * copyright notice, this list of conditions and the following + * disclaimer in the documentation and/or other materials + * provided with the distribution. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND + * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS + * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN + * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN + * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE + * SOFTWARE. + */ + +#include "iwpm_util.h" + +#define IWPM_HASH_BUCKET_SIZE 512 +#define IWPM_HASH_BUCKET_MASK (IWPM_HASH_BUCKET_SIZE - 1) + +static LIST_HEAD(iwpm_nlmsg_req_list); +static DEFINE_SPINLOCK(iwpm_nlmsg_req_lock); + +static struct hlist_head *iwpm_hash_bucket; +static DEFINE_SPINLOCK(iwpm_mapinfo_lock); + +static DEFINE_MUTEX(iwpm_admin_lock); +static struct iwpm_admin_data iwpm_admin; + +int iwpm_init(u8 nl_client) +{ + if (iwpm_valid_client(nl_client)) + return -EINVAL; + mutex_lock(&iwpm_admin_lock); + if (atomic_read(&iwpm_admin.refcount) == 0) { + iwpm_hash_bucket = kzalloc(IWPM_HASH_BUCKET_SIZE * + sizeof(struct hlist_head), GFP_KERNEL); + if (!iwpm_hash_bucket) { + mutex_unlock(&iwpm_admin_lock); + pr_err("%s Unable to create mapinfo hash table\n", __func__); + return -ENOMEM; + } + } + atomic_inc(&iwpm_admin.refcount); + mutex_unlock(&iwpm_admin_lock); + iwpm_set_valid(nl_client, 1); + return 0; +} +EXPORT_SYMBOL(iwpm_init); + +static void free_hash_bucket(void); + +int iwpm_exit(u8 nl_client) +{ + + if (!iwpm_valid_client(nl_client)) + return -EINVAL; + mutex_lock(&iwpm_admin_lock); + if (atomic_read(&iwpm_admin.refcount) == 0) { + mutex_unlock(&iwpm_admin_lock); + pr_err("%s Incorrect usage - negative refcount\n", __func__); + return -EINVAL; + } + if (atomic_dec_and_test(&iwpm_admin.refcount)) { + free_hash_bucket(); + pr_debug("%s: Mapinfo hash table is destroyed\n", __func__); + } + mutex_unlock(&iwpm_admin_lock); + iwpm_set_valid(nl_client, 0); + return 0; +} +EXPORT_SYMBOL(iwpm_exit); + +static struct hlist_head *get_hash_bucket_head(struct sockaddr_storage *, + struct sockaddr_storage *); + +int iwpm_create_mapinfo(struct sockaddr_storage *local_sockaddr, + struct sockaddr_storage *mapped_sockaddr, + u8 nl_client) +{ + struct hlist_head *hash_bucket_head; + struct iwpm_mapping_info *map_info; + unsigned long flags; + + if (!iwpm_valid_client(nl_client)) + return -EINVAL; + map_info = kzalloc(sizeof(struct iwpm_mapping_info), GFP_KERNEL); + if (!map_info) { + pr_err("%s: Unable to allocate a mapping info\n", __func__); + return -ENOMEM; + } + memcpy(&map_info->local_sockaddr, local_sockaddr, + sizeof(struct sockaddr_storage)); + memcpy(&map_info->mapped_sockaddr, mapped_sockaddr, + sizeof(struct sockaddr_storage)); + map_info->nl_client = nl_client; + + spin_lock_irqsave(&iwpm_mapinfo_lock, flags); + if (iwpm_hash_bucket) { + hash_bucket_head = get_hash_bucket_head( + &map_info->local_sockaddr, + &map_info->mapped_sockaddr); + hlist_add_head(&map_info->hlist_node, hash_bucket_head); + } + spin_unlock_irqrestore(&iwpm_mapinfo_lock, flags); + return 0; +} +EXPORT_SYMBOL(iwpm_create_mapinfo); + +int iwpm_remove_mapinfo(struct sockaddr_storage *local_sockaddr, + struct sockaddr_storage *mapped_local_addr) +{ + struct hlist_node *tmp_hlist_node; + struct hlist_head *hash_bucket_head; + struct iwpm_mapping_info *map_info = NULL; + unsigned long flags; + int ret = -EINVAL; + + spin_lock_irqsave(&iwpm_mapinfo_lock, flags); + if (iwpm_hash_bucket) { + hash_bucket_head = get_hash_bucket_head( + local_sockaddr, + mapped_local_addr); + hlist_for_each_entry_safe(map_info, tmp_hlist_node, + hash_bucket_head, hlist_node) { + + if (!iwpm_compare_sockaddr(&map_info->mapped_sockaddr, + mapped_local_addr)) { + + hlist_del_init(&map_info->hlist_node); + kfree(map_info); + ret = 0; + break; + } + } + } + spin_unlock_irqrestore(&iwpm_mapinfo_lock, flags); + return ret; +} +EXPORT_SYMBOL(iwpm_remove_mapinfo); + +static void free_hash_bucket(void) +{ + struct hlist_node *tmp_hlist_node; + struct iwpm_mapping_info *map_info; + unsigned long flags; + int i; + + /* remove all the mapinfo data from the list */ + spin_lock_irqsave(&iwpm_mapinfo_lock, flags); + for (i = 0; i < IWPM_HASH_BUCKET_SIZE; i++) { + hlist_for_each_entry_safe(map_info, tmp_hlist_node, + &iwpm_hash_bucket[i], hlist_node) { + + hlist_del_init(&map_info->hlist_node); + kfree(map_info); + } + } + /* free the hash list */ + kfree(iwpm_hash_bucket); + iwpm_hash_bucket = NULL; + spin_unlock_irqrestore(&iwpm_mapinfo_lock, flags); +} + +struct iwpm_nlmsg_request *iwpm_get_nlmsg_request(__u32 nlmsg_seq, + u8 nl_client, gfp_t gfp) +{ + struct iwpm_nlmsg_request *nlmsg_request = NULL; + unsigned long flags; + + nlmsg_request = kzalloc(sizeof(struct iwpm_nlmsg_request), gfp); + if (!nlmsg_request) { + pr_err("%s Unable to allocate a nlmsg_request\n", __func__); + return NULL; + } + spin_lock_irqsave(&iwpm_nlmsg_req_lock, flags); + list_add_tail(&nlmsg_request->inprocess_list, &iwpm_nlmsg_req_list); + spin_unlock_irqrestore(&iwpm_nlmsg_req_lock, flags); + + kref_init(&nlmsg_request->kref); + kref_get(&nlmsg_request->kref); + nlmsg_request->nlmsg_seq = nlmsg_seq; + nlmsg_request->nl_client = nl_client; + nlmsg_request->request_done = 0; + nlmsg_request->err_code = 0; + return nlmsg_request; +} + +void iwpm_free_nlmsg_request(struct kref *kref) +{ + struct iwpm_nlmsg_request *nlmsg_request; + unsigned long flags; + + nlmsg_request = container_of(kref, struct iwpm_nlmsg_request, kref); + + spin_lock_irqsave(&iwpm_nlmsg_req_lock, flags); + list_del_init(&nlmsg_request->inprocess_list); + spin_unlock_irqrestore(&iwpm_nlmsg_req_lock, flags); + + if (!nlmsg_request->request_done) + pr_debug("%s Freeing incomplete nlmsg request (seq = %u).\n", + __func__, nlmsg_request->nlmsg_seq); + kfree(nlmsg_request); +} + +struct iwpm_nlmsg_request *iwpm_find_nlmsg_request(__u32 echo_seq) +{ + struct iwpm_nlmsg_request *nlmsg_request; + struct iwpm_nlmsg_request *found_request = NULL; + unsigned long flags; + + spin_lock_irqsave(&iwpm_nlmsg_req_lock, flags); + list_for_each_entry(nlmsg_request, &iwpm_nlmsg_req_list, + inprocess_list) { + if (nlmsg_request->nlmsg_seq == echo_seq) { + found_request = nlmsg_request; + kref_get(&nlmsg_request->kref); + break; + } + } + spin_unlock_irqrestore(&iwpm_nlmsg_req_lock, flags); + return found_request; +} + +int iwpm_wait_complete_req(struct iwpm_nlmsg_request *nlmsg_request) +{ + int ret; + init_waitqueue_head(&nlmsg_request->waitq); + + ret = wait_event_timeout(nlmsg_request->waitq, + (nlmsg_request->request_done != 0), IWPM_NL_TIMEOUT); + if (!ret) { + ret = -EINVAL; + pr_info("%s: Timeout %d sec for netlink request (seq = %u)\n", + __func__, (IWPM_NL_TIMEOUT/HZ), nlmsg_request->nlmsg_seq); + } else { + ret = nlmsg_request->err_code; + } + kref_put(&nlmsg_request->kref, iwpm_free_nlmsg_request); + return ret; +} + +int iw |