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path: root/drivers/infiniband/core/iwpm_msg.c
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Diffstat (limited to 'drivers/infiniband/core/iwpm_msg.c')
-rw-r--r--drivers/infiniband/core/iwpm_msg.c308
1 files changed, 200 insertions, 108 deletions
diff --git a/drivers/infiniband/core/iwpm_msg.c b/drivers/infiniband/core/iwpm_msg.c
index a0e7c16d8bd8..3c9a9869212b 100644
--- a/drivers/infiniband/core/iwpm_msg.c
+++ b/drivers/infiniband/core/iwpm_msg.c
@@ -34,19 +34,25 @@
#include "iwpm_util.h"
static const char iwpm_ulib_name[IWPM_ULIBNAME_SIZE] = "iWarpPortMapperUser";
-static int iwpm_ulib_version = 3;
+u16 iwpm_ulib_version = IWPM_UABI_VERSION_MIN;
static int iwpm_user_pid = IWPM_PID_UNDEFINED;
static atomic_t echo_nlmsg_seq;
+/**
+ * iwpm_valid_pid - Check if the userspace iwarp port mapper pid is valid
+ *
+ * Returns true if the pid is greater than zero, otherwise returns false
+ */
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
+/**
+ * iwpm_register_pid - Send a netlink query to userspace
+ * to get the iwarp port mapper pid
+ * @pm_msg: Contains driver info to send to the userspace port mapper
+ * @nl_client: The index of the netlink client
*
* nlmsg attributes:
* [IWPM_NLA_REG_PID_SEQ]
@@ -63,10 +69,6 @@ int iwpm_register_pid(struct iwpm_dev_data *pm_msg, u8 nl_client)
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_check_registration(nl_client, IWPM_REG_VALID) ||
iwpm_user_pid == IWPM_PID_UNAVAILABLE)
return 0;
@@ -101,10 +103,12 @@ int iwpm_register_pid(struct iwpm_dev_data *pm_msg, u8 nl_client)
if (ret)
goto pid_query_error;
+ nlmsg_end(skb, nlh);
+
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);
+ ret = rdma_nl_multicast(&init_net, skb, RDMA_NL_GROUP_IWPM, GFP_KERNEL);
if (ret) {
skb = NULL; /* skb is freed in the netlink send-op handling */
iwpm_user_pid = IWPM_PID_UNAVAILABLE;
@@ -115,21 +119,26 @@ int iwpm_register_pid(struct iwpm_dev_data *pm_msg, u8 nl_client)
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);
+ pr_info("%s: %s (client = %u)\n", __func__, err_str, nl_client);
+ 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
+/**
+ * iwpm_add_mapping - Send a netlink add mapping request to
+ * the userspace port mapper
+ * @pm_msg: Contains the local ip/tcp address info to send
+ * @nl_client: The index of the netlink client
+ *
* nlmsg attributes:
* [IWPM_NLA_MANAGE_MAPPING_SEQ]
* [IWPM_NLA_MANAGE_ADDR]
+ * [IWPM_NLA_MANAGE_FLAGS]
+ *
+ * If the request is successful, the pm_msg stores
+ * the port mapper response (mapped address info)
*/
int iwpm_add_mapping(struct iwpm_sa_data *pm_msg, u8 nl_client)
{
@@ -140,10 +149,6 @@ int iwpm_add_mapping(struct iwpm_sa_data *pm_msg, u8 nl_client)
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_valid_pid())
return 0;
if (!iwpm_check_registration(nl_client, IWPM_REG_VALID)) {
@@ -172,9 +177,23 @@ int iwpm_add_mapping(struct iwpm_sa_data *pm_msg, u8 nl_client)
&pm_msg->loc_addr, IWPM_NLA_MANAGE_ADDR);
if (ret)
goto add_mapping_error;
+
+ /* If flags are required and we're not V4, then return a quiet error */
+ if (pm_msg->flags && iwpm_ulib_version == IWPM_UABI_VERSION_MIN) {
+ ret = -EINVAL;
+ goto add_mapping_error_nowarn;
+ }
+ if (iwpm_ulib_version > IWPM_UABI_VERSION_MIN) {
+ ret = ibnl_put_attr(skb, nlh, sizeof(u32), &pm_msg->flags,
+ IWPM_NLA_MANAGE_FLAGS);
+ if (ret)
+ goto add_mapping_error;
+ }
+
+ nlmsg_end(skb, nlh);
nlmsg_request->req_buffer = pm_msg;
- ret = ibnl_unicast(skb, nlh, iwpm_user_pid);
+ ret = rdma_nl_unicast_wait(&init_net, skb, iwpm_user_pid);
if (ret) {
skb = NULL; /* skb is freed in the netlink send-op handling */
iwpm_user_pid = IWPM_PID_UNDEFINED;
@@ -184,22 +203,25 @@ int iwpm_add_mapping(struct iwpm_sa_data *pm_msg, u8 nl_client)
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);
+ pr_info("%s: %s (client = %u)\n", __func__, err_str, nl_client);
+add_mapping_error_nowarn:
+ 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
+/**
+ * iwpm_add_and_query_mapping - Process the port mapper response to
+ * iwpm_add_and_query_mapping request
+ * @pm_msg: Contains the local ip/tcp address info to send
+ * @nl_client: The index of the netlink client
+ *
* nlmsg attributes:
* [IWPM_NLA_QUERY_MAPPING_SEQ]
* [IWPM_NLA_QUERY_LOCAL_ADDR]
* [IWPM_NLA_QUERY_REMOTE_ADDR]
+ * [IWPM_NLA_QUERY_FLAGS]
*/
int iwpm_add_and_query_mapping(struct iwpm_sa_data *pm_msg, u8 nl_client)
{
@@ -210,10 +232,6 @@ int iwpm_add_and_query_mapping(struct iwpm_sa_data *pm_msg, u8 nl_client)
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_valid_pid())
return 0;
if (!iwpm_check_registration(nl_client, IWPM_REG_VALID)) {
@@ -249,9 +267,23 @@ int iwpm_add_and_query_mapping(struct iwpm_sa_data *pm_msg, u8 nl_client)
&pm_msg->rem_addr, IWPM_NLA_QUERY_REMOTE_ADDR);
if (ret)
goto query_mapping_error;
+
+ /* If flags are required and we're not V4, then return a quite error */
+ if (pm_msg->flags && iwpm_ulib_version == IWPM_UABI_VERSION_MIN) {
+ ret = -EINVAL;
+ goto query_mapping_error_nowarn;
+ }
+ if (iwpm_ulib_version > IWPM_UABI_VERSION_MIN) {
+ ret = ibnl_put_attr(skb, nlh, sizeof(u32), &pm_msg->flags,
+ IWPM_NLA_QUERY_FLAGS);
+ if (ret)
+ goto query_mapping_error;
+ }
+
+ nlmsg_end(skb, nlh);
nlmsg_request->req_buffer = pm_msg;
- ret = ibnl_unicast(skb, nlh, iwpm_user_pid);
+ ret = rdma_nl_unicast_wait(&init_net, skb, iwpm_user_pid);
if (ret) {
skb = NULL; /* skb is freed in the netlink send-op handling */
err_str = "Unable to send a nlmsg";
@@ -260,18 +292,21 @@ int iwpm_add_and_query_mapping(struct iwpm_sa_data *pm_msg, u8 nl_client)
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);
+ pr_info("%s: %s (client = %u)\n", __func__, err_str, nl_client);
+query_mapping_error_nowarn:
+ 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
+/**
+ * iwpm_remove_mapping - Send a netlink remove mapping request
+ * to the userspace port mapper
+ *
+ * @local_addr: Local ip/tcp address to remove
+ * @nl_client: The index of the netlink client
+ *
* nlmsg attributes:
* [IWPM_NLA_MANAGE_MAPPING_SEQ]
* [IWPM_NLA_MANAGE_ADDR]
@@ -284,10 +319,6 @@ int iwpm_remove_mapping(struct sockaddr_storage *local_addr, u8 nl_client)
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_valid_pid())
return 0;
if (iwpm_check_registration(nl_client, IWPM_REG_UNDEF)) {
@@ -312,7 +343,9 @@ int iwpm_remove_mapping(struct sockaddr_storage *local_addr, u8 nl_client)
if (ret)
goto remove_mapping_error;
- ret = ibnl_unicast(skb, nlh, iwpm_user_pid);
+ nlmsg_end(skb, nlh);
+
+ ret = rdma_nl_unicast_wait(&init_net, skb, iwpm_user_pid);
if (ret) {
skb = NULL; /* skb is freed in the netlink send-op handling */
iwpm_user_pid = IWPM_PID_UNDEFINED;
@@ -323,12 +356,11 @@ int iwpm_remove_mapping(struct sockaddr_storage *local_addr, u8 nl_client)
"remove_mapping: Local sockaddr:");
return 0;
remove_mapping_error:
- pr_info("%s: %s (client = %d)\n", __func__, err_str, nl_client);
+ pr_info("%s: %s (client = %u)\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] = {
@@ -341,9 +373,14 @@ static const struct nla_policy resp_reg_policy[IWPM_NLA_RREG_PID_MAX] = {
[IWPM_NLA_RREG_PID_ERR] = { .type = NLA_U16 }
};
-/*
- * iwpm_register_pid_cb - Process a port mapper response to
- * iwpm_register_pid()
+/**
+ * iwpm_register_pid_cb - Process the port mapper response to
+ * iwpm_register_pid query
+ * @skb: The socket buffer
+ * @cb: Contains the received message (payload and netlink header)
+ *
+ * If successful, the function receives the userspace port mapper pid
+ * which is used in future communication with the port mapper
*/
int iwpm_register_pid_cb(struct sk_buff *skb, struct netlink_callback *cb)
{
@@ -376,19 +413,22 @@ int iwpm_register_pid_cb(struct sk_buff *skb, struct netlink_callback *cb)
/* 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) {
+ iwpm_version < IWPM_UABI_VERSION_MIN) {
- pr_info("%s: Incorrect info (dev = %s name = %s version = %d)\n",
+ pr_info("%s: Incorrect info (dev = %s name = %s version = %u)\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;
+ iwpm_ulib_version = iwpm_version;
+ if (iwpm_ulib_version < IWPM_UABI_VERSION)
+ pr_warn_once("%s: Down level iwpmd/pid %d. Continuing...",
+ __func__, iwpm_user_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_registration(nl_client, IWPM_REG_VALID);
+ iwpm_set_registration(nl_client, IWPM_REG_VALID);
register_pid_response_exit:
nlmsg_request->request_done = 1;
/* always for found nlmsg_request */
@@ -397,19 +437,22 @@ register_pid_response_exit:
up(&nlmsg_request->sem);
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_NLA_RMANAGE_MAPPING_SEQ] = { .type = NLA_U32 },
+ [IWPM_NLA_RMANAGE_ADDR] = {
+ .len = sizeof(struct sockaddr_storage) },
+ [IWPM_NLA_RMANAGE_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()
+/**
+ * iwpm_add_mapping_cb - Process the port mapper response to
+ * iwpm_add_mapping request
+ * @skb: The socket buffer
+ * @cb: Contains the received message (payload and netlink header)
*/
int iwpm_add_mapping_cb(struct sk_buff *skb, struct netlink_callback *cb)
{
@@ -428,7 +471,7 @@ int iwpm_add_mapping_cb(struct sk_buff *skb, struct netlink_callback *cb)
atomic_set(&echo_nlmsg_seq, cb->nlh->nlmsg_seq);
- msg_seq = nla_get_u32(nltb[IWPM_NLA_MANAGE_MAPPING_SEQ]);
+ msg_seq = nla_get_u32(nltb[IWPM_NLA_RMANAGE_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",
@@ -437,9 +480,9 @@ int iwpm_add_mapping_cb(struct sk_buff *skb, struct netlink_callback *cb)
}
pm_msg = nlmsg_request->req_buffer;
local_sockaddr = (struct sockaddr_storage *)
- nla_data(nltb[IWPM_NLA_MANAGE_ADDR]);
+ nla_data(nltb[IWPM_NLA_RMANAGE_ADDR]);
mapped_sockaddr = (struct sockaddr_storage *)
- nla_data(nltb[IWPM_NLA_MANAGE_MAPPED_LOC_ADDR]);
+ nla_data(nltb[IWPM_NLA_RMANAGE_MAPPED_LOC_ADDR]);
if (iwpm_compare_sockaddr(local_sockaddr, &pm_msg->loc_addr)) {
nlmsg_request->err_code = IWPM_USER_LIB_INFO_ERR;
@@ -466,22 +509,28 @@ add_mapping_response_exit:
up(&nlmsg_request->sem);
return 0;
}
-EXPORT_SYMBOL(iwpm_add_mapping_cb);
/* netlink attribute policy for the response to add and query mapping request
- * and response with remote address info */
+ * and response with remote address info
+ */
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_SEQ] = { .type = NLA_U32 },
+ [IWPM_NLA_RQUERY_LOCAL_ADDR] = {
+ .len = sizeof(struct sockaddr_storage) },
+ [IWPM_NLA_RQUERY_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()
+/**
+ * iwpm_add_and_query_mapping_cb - Process the port mapper response to
+ * iwpm_add_and_query_mapping request
+ * @skb: The socket buffer
+ * @cb: Contains the received message (payload and netlink header)
*/
int iwpm_add_and_query_mapping_cb(struct sk_buff *skb,
struct netlink_callback *cb)
@@ -501,7 +550,7 @@ int iwpm_add_and_query_mapping_cb(struct sk_buff *skb,
return -EINVAL;
atomic_set(&echo_nlmsg_seq, cb->nlh->nlmsg_seq);
- msg_seq = nla_get_u32(nltb[IWPM_NLA_QUERY_MAPPING_SEQ]);
+ msg_seq = nla_get_u32(nltb[IWPM_NLA_RQUERY_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",
@@ -510,9 +559,9 @@ int iwpm_add_and_query_mapping_cb(struct sk_buff *skb,
}
pm_msg = nlmsg_request->req_buffer;
local_sockaddr = (struct sockaddr_storage *)
- nla_data(nltb[IWPM_NLA_QUERY_LOCAL_ADDR]);
+ nla_data(nltb[IWPM_NLA_RQUERY_LOCAL_ADDR]);
remote_sockaddr = (struct sockaddr_storage *)
- nla_data(nltb[IWPM_NLA_QUERY_REMOTE_ADDR]);
+ nla_data(nltb[IWPM_NLA_RQUERY_REMOTE_ADDR]);
mapped_loc_sockaddr = (struct sockaddr_storage *)
nla_data(nltb[IWPM_NLA_RQUERY_MAPPED_LOC_ADDR]);
mapped_rem_sockaddr = (struct sockaddr_storage *)
@@ -558,11 +607,14 @@ query_mapping_response_exit:
up(&nlmsg_request->sem);
return 0;
}
-EXPORT_SYMBOL(iwpm_add_and_query_mapping_cb);
-/*
- * iwpm_remote_info_cb - Process a port mapper message, containing
- * the remote connecting peer address info
+/**
+ * iwpm_remote_info_cb - Process remote connecting peer address info, which
+ * the port mapper has received from the connecting peer
+ * @skb: The socket buffer
+ * @cb: Contains the received message (payload and netlink header)
+ *
+ * Stores the IPv4/IPv6 address info in a hash table
*/
int iwpm_remote_info_cb(struct sk_buff *skb, struct netlink_callback *cb)
{
@@ -580,17 +632,12 @@ int iwpm_remote_info_cb(struct sk_buff *skb, struct netlink_callback *cb)
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;
- }
atomic_set(&echo_nlmsg_seq, cb->nlh->nlmsg_seq);
local_sockaddr = (struct sockaddr_storage *)
- nla_data(nltb[IWPM_NLA_QUERY_LOCAL_ADDR]);
+ nla_data(nltb[IWPM_NLA_RQUERY_LOCAL_ADDR]);
remote_sockaddr = (struct sockaddr_storage *)
- nla_data(nltb[IWPM_NLA_QUERY_REMOTE_ADDR]);
+ nla_data(nltb[IWPM_NLA_RQUERY_REMOTE_ADDR]);
mapped_loc_sockaddr = (struct sockaddr_storage *)
nla_data(nltb[IWPM_NLA_RQUERY_MAPPED_LOC_ADDR]);
mapped_rem_sockaddr = (struct sockaddr_storage *)
@@ -627,7 +674,6 @@ int iwpm_remote_info_cb(struct sk_buff *skb, struct netlink_callback *cb)
"remote_info: Mapped remote sockaddr:");
return ret;
}
-EXPORT_SYMBOL(iwpm_remote_info_cb);
/* netlink attribute policy for the received request for mapping info */
static const struct nla_policy resp_mapinfo_policy[IWPM_NLA_MAPINFO_REQ_MAX] = {
@@ -636,8 +682,14 @@ static const struct nla_policy resp_mapinfo_policy[IWPM_NLA_MAPINFO_REQ_MAX] = {
[IWPM_NLA_MAPINFO_ULIB_VER] = { .type = NLA_U16 }
};
-/*
- * iwpm_mapping_info_cb - Process a port mapper request for mapping info
+/**
+ * iwpm_mapping_info_cb - Process a notification that the userspace
+ * port mapper daemon is started
+ * @skb: The socket buffer
+ * @cb: Contains the received message (payload and netlink header)
+ *
+ * Using the received port mapper pid, send all the local mapping
+ * info records to the userspace port mapper
*/
int iwpm_mapping_info_cb(struct sk_buff *skb, struct netlink_callback *cb)
{
@@ -656,20 +708,20 @@ int iwpm_mapping_info_cb(struct sk_buff *skb, struct netlink_callback *cb)
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",
+ iwpm_version < IWPM_UABI_VERSION_MIN) {
+ pr_info("%s: Invalid port mapper name = %s version = %u\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_registration(nl_client, IWPM_REG_INCOMPL);
atomic_set(&echo_nlmsg_seq, cb->nlh->nlmsg_seq);
iwpm_user_pid = cb->nlh->nlmsg_pid;
+
+ if (iwpm_ulib_version < IWPM_UABI_VERSION)
+ pr_warn_once("%s: Down level iwpmd/pid %d. Continuing...",
+ __func__, iwpm_user_pid);
+
if (!iwpm_mapinfo_available())
return 0;
pr_debug("%s: iWarp Port Mapper (pid = %d) is available!\n",
@@ -677,7 +729,6 @@ int iwpm_mapping_info_cb(struct sk_buff *skb, struct netlink_callback *cb)
ret = iwpm_send_mapinfo(nl_client, iwpm_user_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] = {
@@ -686,9 +737,11 @@ static const struct nla_policy ack_mapinfo_policy[IWPM_NLA_MAPINFO_NUM_MAX] = {
[IWPM_NLA_MAPINFO_ACK_NUM] = { .type = NLA_U32 }
};
-/*
- * iwpm_ack_mapping_info_cb - Process a port mapper ack for
- * the provided mapping info records
+/**
+ * iwpm_ack_mapping_info_cb - Process the port mapper ack for
+ * the provided local mapping info records
+ * @skb: The socket buffer
+ * @cb: Contains the received message (payload and netlink header)
*/
int iwpm_ack_mapping_info_cb(struct sk_buff *skb, struct netlink_callback *cb)
{
@@ -707,7 +760,6 @@ int iwpm_ack_mapping_info_cb(struct sk_buff *skb, struct netlink_callback *cb)
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] = {
@@ -715,8 +767,11 @@ static const struct nla_policy map_error_policy[IWPM_NLA_ERR_MAX] = {
[IWPM_NLA_ERR_CODE] = { .type = NLA_U16 },
};
-/*
- * iwpm_mapping_error_cb - Process a port mapper error message
+/**
+ * iwpm_mapping_error_cb - Process port mapper notification for error
+ *
+ * @skb: The socket buffer
+ * @cb: Contains the received message (payload and netlink header)
*/
int iwpm_mapping_error_cb(struct sk_buff *skb, struct netlink_callback *cb)
{
@@ -751,4 +806,41 @@ int iwpm_mapping_error_cb(struct sk_buff *skb, struct netlink_callback *cb)
up(&nlmsg_request->sem);
return 0;
}
-EXPORT_SYMBOL(iwpm_mapping_error_cb);
+
+/* netlink attribute policy for the received hello request */
+static const struct nla_policy hello_policy[IWPM_NLA_HELLO_MAX] = {
+ [IWPM_NLA_HELLO_ABI_VERSION] = { .type = NLA_U16 }
+};
+
+/**
+ * iwpm_hello_cb - Process a hello message from iwpmd
+ *
+ * @skb: The socket buffer
+ * @cb: Contains the received message (payload and netlink header)
+ *
+ * Using the received port mapper pid, send the kernel's abi_version
+ * after adjusting it to support the iwpmd version.
+ */
+int iwpm_hello_cb(struct sk_buff *skb, struct netlink_callback *cb)
+{
+ struct nlattr *nltb[IWPM_NLA_HELLO_MAX];
+ const char *msg_type = "Hello request";
+ u8 nl_client;
+ u16 abi_version;
+ int ret = -EINVAL;
+
+ if (iwpm_parse_nlmsg(cb, IWPM_NLA_HELLO_MAX, hello_policy, nltb,
+ msg_type)) {
+ pr_info("%s: Unable to parse nlmsg\n", __func__);
+ return ret;
+ }
+ abi_version = nla_get_u16(nltb[IWPM_NLA_HELLO_ABI_VERSION]);
+ nl_client = RDMA_NL_GET_CLIENT(cb->nlh->nlmsg_type);
+ iwpm_set_registration(nl_client, IWPM_REG_INCOMPL);
+ atomic_set(&echo_nlmsg_seq, cb->nlh->nlmsg_seq);
+ iwpm_ulib_version = min_t(u16, IWPM_UABI_VERSION, abi_version);
+ pr_debug("Using ABI version %u\n", iwpm_ulib_version);
+ iwpm_user_pid = cb->nlh->nlmsg_pid;
+ ret = iwpm_send_hello(nl_client, iwpm_user_pid, iwpm_ulib_version);
+ return ret;
+}
generated by cgit (git 2.34.1) at 2025-12-25 11:30:42 +0000