new file mode 100644
@@ -0,0 +1,519 @@
+/*
+ * InfiniBand Transport Layer
+ *
+ * Copyright (c) 2014 - 2017 ProfitBricks GmbH. All rights reserved.
+ * Authors: Fabian Holler <mail@fholler.de>
+ * Jack Wang <jinpu.wang@profitbricks.com>
+ * Kleber Souza <kleber.souza@profitbricks.com>
+ * Danil Kipnis <danil.kipnis@profitbricks.com>
+ * Roman Penyaev <roman.penyaev@profitbricks.com>
+ * Milind Dumbare <Milind.dumbare@gmail.com>
+ *
+ * Copyright (c) 2017 - 2018 ProfitBricks GmbH. All rights reserved.
+ * Authors: Danil Kipnis <danil.kipnis@profitbricks.com>
+ * Roman Penyaev <roman.penyaev@profitbricks.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#undef pr_fmt
+#define pr_fmt(fmt) KBUILD_MODNAME " L" __stringify(__LINE__) ": " fmt
+
+#include "ibtrs-pri.h"
+#include "ibtrs-clt.h"
+#include "ibtrs-log.h"
+
+static struct kobject *ibtrs_kobj;
+
+#define MIN_MAX_RECONN_ATT -1
+#define MAX_MAX_RECONN_ATT 9999
+
+static struct kobj_type ktype = {
+ .sysfs_ops = &kobj_sysfs_ops,
+};
+
+static ssize_t ibtrs_clt_max_reconn_attempts_show(struct kobject *kobj,
+ struct kobj_attribute *attr,
+ char *page)
+{
+ struct ibtrs_clt *clt;
+
+ clt = container_of(kobj, struct ibtrs_clt, kobj);
+
+ return sprintf(page, "%d\n", ibtrs_clt_get_max_reconnect_attempts(clt));
+}
+
+static ssize_t ibtrs_clt_max_reconn_attempts_store(struct kobject *kobj,
+ struct kobj_attribute *attr,
+ const char *buf,
+ size_t count)
+{
+ struct ibtrs_clt *clt;
+ int value;
+ int ret;
+
+ clt = container_of(kobj, struct ibtrs_clt, kobj);
+
+ ret = kstrtoint(buf, 10, &value);
+ if (unlikely(ret)) {
+ ibtrs_err(clt, "%s: failed to convert string '%s' to int\n",
+ attr->attr.name, buf);
+ return ret;
+ }
+ if (unlikely(value > MAX_MAX_RECONN_ATT ||
+ value < MIN_MAX_RECONN_ATT)) {
+ ibtrs_err(clt, "%s: invalid range"
+ " (provided: '%s', accepted: min: %d, max: %d)\n",
+ attr->attr.name, buf, MIN_MAX_RECONN_ATT,
+ MAX_MAX_RECONN_ATT);
+ return -EINVAL;
+ }
+ ibtrs_clt_set_max_reconnect_attempts(clt, value);
+
+ return count;
+}
+
+static struct kobj_attribute ibtrs_clt_max_reconnect_attempts_attr =
+ __ATTR(max_reconnect_attempts, 0644,
+ ibtrs_clt_max_reconn_attempts_show,
+ ibtrs_clt_max_reconn_attempts_store);
+
+static ssize_t ibtrs_clt_mp_policy_show(struct kobject *kobj,
+ struct kobj_attribute *attr,
+ char *page)
+{
+ struct ibtrs_clt *clt;
+
+ clt = container_of(kobj, struct ibtrs_clt, kobj);
+
+ switch (clt->mp_policy) {
+ case MP_POLICY_RR:
+ return sprintf(page, "round-robin (RR: %d)\n", clt->mp_policy);
+ case MP_POLICY_MIN_INFLIGHT:
+ return sprintf(page, "min-inflight (MI: %d)\n", clt->mp_policy);
+ default:
+ return sprintf(page, "Unknown (%d)\n", clt->mp_policy);
+ }
+}
+
+static ssize_t ibtrs_clt_mp_policy_store(struct kobject *kobj,
+ struct kobj_attribute *attr,
+ const char *buf,
+ size_t count)
+{
+ struct ibtrs_clt *clt;
+ int value;
+ int ret;
+
+ clt = container_of(kobj, struct ibtrs_clt, kobj);
+
+ ret = kstrtoint(buf, 10, &value);
+ if (!ret && (value == MP_POLICY_RR || value == MP_POLICY_MIN_INFLIGHT)) {
+ clt->mp_policy = value;
+ return count;
+ }
+
+ if (!strncasecmp(buf, "round-robin", 11) ||
+ !strncasecmp(buf, "rr", 2))
+ clt->mp_policy = MP_POLICY_RR;
+ else if (!strncasecmp(buf, "min-inflight", 12) ||
+ !strncasecmp(buf, "mi", 2))
+ clt->mp_policy = MP_POLICY_MIN_INFLIGHT;
+ else
+ return -EINVAL;
+
+ return count;
+}
+
+static struct kobj_attribute ibtrs_clt_mp_policy_attr =
+ __ATTR(mp_policy, 0644,
+ ibtrs_clt_mp_policy_show,
+ ibtrs_clt_mp_policy_store);
+
+static ssize_t ibtrs_clt_state_show(struct kobject *kobj,
+ struct kobj_attribute *attr, char *page)
+{
+ struct ibtrs_clt_sess *sess;
+
+ sess = container_of(kobj, struct ibtrs_clt_sess, kobj);
+ if (ibtrs_clt_sess_is_connected(sess))
+ return sprintf(page, "connected\n");
+
+ return sprintf(page, "disconnected\n");
+}
+
+static struct kobj_attribute ibtrs_clt_state_attr =
+ __ATTR(state, 0444, ibtrs_clt_state_show, NULL);
+
+static ssize_t ibtrs_clt_reconnect_show(struct kobject *kobj,
+ struct kobj_attribute *attr,
+ char *page)
+{
+ return scnprintf(page, PAGE_SIZE, "Usage: echo 1 > %s\n",
+ attr->attr.name);
+}
+
+static ssize_t ibtrs_clt_reconnect_store(struct kobject *kobj,
+ struct kobj_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct ibtrs_clt_sess *sess;
+ int ret;
+
+ sess = container_of(kobj, struct ibtrs_clt_sess, kobj);
+ if (!sysfs_streq(buf, "1")) {
+ ibtrs_err(sess, "%s: unknown value: '%s'\n",
+ attr->attr.name, buf);
+ return -EINVAL;
+ }
+ ret = ibtrs_clt_reconnect_from_sysfs(sess);
+ if (unlikely(ret))
+ return ret;
+
+ return count;
+}
+
+static struct kobj_attribute ibtrs_clt_reconnect_attr =
+ __ATTR(reconnect, 0644, ibtrs_clt_reconnect_show,
+ ibtrs_clt_reconnect_store);
+
+static ssize_t ibtrs_clt_disconnect_show(struct kobject *kobj,
+ struct kobj_attribute *attr,
+ char *page)
+{
+ return scnprintf(page, PAGE_SIZE, "Usage: echo 1 > %s\n",
+ attr->attr.name);
+}
+
+static ssize_t ibtrs_clt_disconnect_store(struct kobject *kobj,
+ struct kobj_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct ibtrs_clt_sess *sess;
+ int ret;
+
+ sess = container_of(kobj, struct ibtrs_clt_sess, kobj);
+ if (!sysfs_streq(buf, "1")) {
+ ibtrs_err(sess, "%s: unknown value: '%s'\n",
+ attr->attr.name, buf);
+ return -EINVAL;
+ }
+ ret = ibtrs_clt_disconnect_from_sysfs(sess);
+ if (unlikely(ret))
+ return ret;
+
+ return count;
+}
+
+static struct kobj_attribute ibtrs_clt_disconnect_attr =
+ __ATTR(disconnect, 0644, ibtrs_clt_disconnect_show,
+ ibtrs_clt_disconnect_store);
+
+static ssize_t ibtrs_clt_remove_path_show(struct kobject *kobj,
+ struct kobj_attribute *attr,
+ char *page)
+{
+ return scnprintf(page, PAGE_SIZE, "Usage: echo 1 > %s\n",
+ attr->attr.name);
+}
+
+static ssize_t ibtrs_clt_remove_path_store(struct kobject *kobj,
+ struct kobj_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct ibtrs_clt_sess *sess;
+ int ret;
+
+ sess = container_of(kobj, struct ibtrs_clt_sess, kobj);
+ if (!sysfs_streq(buf, "1")) {
+ ibtrs_err(sess, "%s: unknown value: '%s'\n",
+ attr->attr.name, buf);
+ return -EINVAL;
+ }
+ ret = ibtrs_clt_remove_path_from_sysfs(sess, &attr->attr);
+ if (unlikely(ret))
+ return ret;
+
+ return count;
+}
+
+static struct kobj_attribute ibtrs_clt_remove_path_attr =
+ __ATTR(remove_path, 0644, ibtrs_clt_remove_path_show,
+ ibtrs_clt_remove_path_store);
+
+static ssize_t ibtrs_clt_add_path_show(struct kobject *kobj,
+ struct kobj_attribute *attr, char *page)
+{
+ return scnprintf(page, PAGE_SIZE, "Usage: echo"
+ " [<source addr>,]<destination addr> > %s\n\n"
+ "*addr ::= [ ip:<ipv4|ipv6> | gid:<gid> ]\n",
+ attr->attr.name);
+}
+
+static ssize_t ibtrs_clt_add_path_store(struct kobject *kobj,
+ struct kobj_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct sockaddr_storage srcaddr, dstaddr;
+ struct ibtrs_addr addr = {
+ .src = (struct sockaddr *)&srcaddr,
+ .dst = (struct sockaddr *)&dstaddr
+ };
+ struct ibtrs_clt *clt;
+ const char *nl;
+ size_t len;
+ int err;
+
+ clt = container_of(kobj, struct ibtrs_clt, kobj);
+
+ nl = strchr(buf, '\n');
+ if (nl)
+ len = nl - buf;
+ else
+ len = count;
+ err = ibtrs_addr_to_sockaddr(buf, len, clt->port, &addr);
+ if (unlikely(err))
+ return -EINVAL;
+
+ err = ibtrs_clt_create_path_from_sysfs(clt, &addr);
+ if (unlikely(err))
+ return err;
+
+ return count;
+}
+
+static struct kobj_attribute ibtrs_clt_add_path_attr =
+ __ATTR(add_path, 0644, ibtrs_clt_add_path_show,
+ ibtrs_clt_add_path_store);
+
+STAT_ATTR(struct ibtrs_clt_sess, cpu_migration,
+ ibtrs_clt_stats_migration_cnt_to_str,
+ ibtrs_clt_reset_cpu_migr_stats);
+
+STAT_ATTR(struct ibtrs_clt_sess, sg_entries,
+ ibtrs_clt_stats_sg_list_distr_to_str,
+ ibtrs_clt_reset_sg_list_distr_stats);
+
+STAT_ATTR(struct ibtrs_clt_sess, reconnects,
+ ibtrs_clt_stats_reconnects_to_str,
+ ibtrs_clt_reset_reconnects_stat);
+
+STAT_ATTR(struct ibtrs_clt_sess, rdma_lat,
+ ibtrs_clt_stats_rdma_lat_distr_to_str,
+ ibtrs_clt_reset_rdma_lat_distr_stats);
+
+STAT_ATTR(struct ibtrs_clt_sess, wc_completion,
+ ibtrs_clt_stats_wc_completion_to_str,
+ ibtrs_clt_reset_wc_comp_stats);
+
+STAT_ATTR(struct ibtrs_clt_sess, rdma,
+ ibtrs_clt_stats_rdma_to_str,
+ ibtrs_clt_reset_rdma_stats);
+
+STAT_ATTR(struct ibtrs_clt_sess, reset_all,
+ ibtrs_clt_reset_all_help,
+ ibtrs_clt_reset_all_stats);
+
+static struct attribute *ibtrs_clt_stats_attrs[] = {
+ &sg_entries_attr.attr,
+ &cpu_migration_attr.attr,
+ &reconnects_attr.attr,
+ &rdma_lat_attr.attr,
+ &wc_completion_attr.attr,
+ &rdma_attr.attr,
+ &reset_all_attr.attr,
+ NULL,
+};
+
+static struct attribute_group ibtrs_clt_stats_attr_group = {
+ .attrs = ibtrs_clt_stats_attrs,
+};
+
+static int ibtrs_clt_create_stats_files(struct kobject *kobj,
+ struct kobject *kobj_stats)
+{
+ int ret;
+
+ ret = kobject_init_and_add(kobj_stats, &ktype, kobj, "stats");
+ if (ret) {
+ pr_err("Failed to init and add stats kobject, err: %d\n",
+ ret);
+ return ret;
+ }
+
+ ret = sysfs_create_group(kobj_stats, &ibtrs_clt_stats_attr_group);
+ if (ret) {
+ pr_err("failed to create stats sysfs group, err: %d\n",
+ ret);
+ goto err;
+ }
+
+ return 0;
+
+err:
+ kobject_del(kobj_stats);
+ kobject_put(kobj_stats);
+
+ return ret;
+}
+
+static struct attribute *ibtrs_clt_sess_attrs[] = {
+ &ibtrs_clt_state_attr.attr,
+ &ibtrs_clt_reconnect_attr.attr,
+ &ibtrs_clt_disconnect_attr.attr,
+ &ibtrs_clt_remove_path_attr.attr,
+ NULL,
+};
+
+static struct attribute_group ibtrs_clt_sess_attr_group = {
+ .attrs = ibtrs_clt_sess_attrs,
+};
+
+int ibtrs_clt_create_sess_files(struct ibtrs_clt_sess *sess)
+{
+ struct ibtrs_clt *clt = sess->clt;
+ char str[MAXHOSTNAMELEN];
+ int err;
+
+ sockaddr_to_str((struct sockaddr *)&sess->s.dst_addr, str, sizeof(str));
+
+ err = kobject_init_and_add(&sess->kobj, &ktype, &clt->kobj_paths,
+ "%s", str);
+ if (unlikely(err)) {
+ pr_err("kobject_init_and_add: %d\n", err);
+ return err;
+ }
+ err = sysfs_create_group(&sess->kobj, &ibtrs_clt_sess_attr_group);
+ if (unlikely(err)) {
+ pr_err("sysfs_create_group(): %d\n", err);
+ goto put_kobj;
+ }
+ err = ibtrs_clt_create_stats_files(&sess->kobj, &sess->kobj_stats);
+ if (unlikely(err))
+ goto put_kobj;
+
+ return 0;
+
+put_kobj:
+ kobject_del(&sess->kobj);
+ kobject_put(&sess->kobj);
+
+ return err;
+}
+
+static void ibtrs_sysfs_remove_file_self(struct kobject *kobj,
+ const struct attribute *attr)
+{
+ struct device_attribute dattr = {
+ .attr.name = attr->name
+ };
+ struct device *device;
+
+ /*
+ * Unfortunately original sysfs_remove_file_self() is not exported,
+ * so consider this as a hack to call self removal of a sysfs entry
+ * just using another "door".
+ */
+
+ device = container_of(kobj, typeof(*device), kobj);
+ device_remove_file_self(device, &dattr);
+}
+
+void ibtrs_clt_destroy_sess_files(struct ibtrs_clt_sess *sess,
+ const struct attribute *sysfs_self)
+{
+ if (sess->kobj.state_in_sysfs) {
+ kobject_del(&sess->kobj_stats);
+ kobject_put(&sess->kobj_stats);
+ if (sysfs_self)
+ /* To avoid deadlock firstly commit suicide */
+ ibtrs_sysfs_remove_file_self(&sess->kobj, sysfs_self);
+ kobject_del(&sess->kobj);
+ kobject_put(&sess->kobj);
+ }
+}
+
+static struct attribute *ibtrs_clt_attrs[] = {
+ &ibtrs_clt_max_reconnect_attempts_attr.attr,
+ &ibtrs_clt_mp_policy_attr.attr,
+ &ibtrs_clt_add_path_attr.attr,
+ NULL,
+};
+
+static struct attribute_group ibtrs_clt_attr_group = {
+ .attrs = ibtrs_clt_attrs,
+};
+
+int ibtrs_clt_create_sysfs_root_folders(struct ibtrs_clt *clt)
+{
+ int err;
+
+ err = kobject_init_and_add(&clt->kobj, &ktype, ibtrs_kobj,
+ "%s", clt->sessname);
+ if (unlikely(err)) {
+ pr_err("kobject_init_and_add(): %d\n", err);
+ return err;
+ }
+ err = kobject_init_and_add(&clt->kobj_paths, &ktype,
+ &clt->kobj, "paths");
+ if (unlikely(err)) {
+ pr_err("kobject_init_and_add(): %d\n", err);
+ goto put_kobj;
+ }
+
+ return 0;
+
+put_kobj:
+ kobject_del(&clt->kobj);
+ kobject_put(&clt->kobj);
+
+ return err;
+}
+
+int ibtrs_clt_create_sysfs_root_files(struct ibtrs_clt *clt)
+{
+ return sysfs_create_group(&clt->kobj, &ibtrs_clt_attr_group);
+}
+
+void ibtrs_clt_destroy_sysfs_root_folders(struct ibtrs_clt *clt)
+{
+ if (clt->kobj_paths.state_in_sysfs) {
+ kobject_del(&clt->kobj_paths);
+ kobject_put(&clt->kobj_paths);
+ }
+ if (clt->kobj.state_in_sysfs) {
+ kobject_del(&clt->kobj);
+ kobject_put(&clt->kobj);
+ }
+}
+
+void ibtrs_clt_destroy_sysfs_root_files(struct ibtrs_clt *clt)
+{
+ sysfs_remove_group(&clt->kobj, &ibtrs_clt_attr_group);
+}
+
+int ibtrs_clt_create_sysfs_module_files(void)
+{
+ ibtrs_kobj = kobject_create_and_add(KBUILD_MODNAME, kernel_kobj);
+ if (unlikely(!ibtrs_kobj))
+ return -ENOMEM;
+
+ return 0;
+}
+
+void ibtrs_clt_destroy_sysfs_module_files(void)
+{
+ kobject_del(ibtrs_kobj);
+ kobject_put(ibtrs_kobj);
+}
This is the sysfs interface to IBTRS sessions on client side: /sys/kernel/ibtrs_client/<SESS-NAME>/ *** IBTRS session created by ibtrs_clt_open() API call | |- max_reconnect_attempts | *** number of reconnect attempts for session | |- add_path | *** adds another connection path into IBTRS session | |- paths/<DEST-IP>/ *** established paths to server in a session | |- disconnect | *** disconnect path | |- reconnect | *** reconnect path | |- remove_path | *** remove current path | |- state | *** retrieve current path state | |- stats/ *** current path statistics | |- cpu_migration |- rdma |- rdma_lat |- reconnects |- reset_all |- sg_entries |- wc_completions Signed-off-by: Roman Pen <roman.penyaev@profitbricks.com> Signed-off-by: Danil Kipnis <danil.kipnis@profitbricks.com> Cc: Jack Wang <jinpu.wang@profitbricks.com> --- drivers/infiniband/ulp/ibtrs/ibtrs-clt-sysfs.c | 519 +++++++++++++++++++++++++ 1 file changed, 519 insertions(+)