--- /dev/null
+/******************************************************************************
+*******************************************************************************
+**
+** Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
+** Copyright (C) 2004-2011 Red Hat, Inc. All rights reserved.
+**
+** This copyrighted material is made available to anyone wishing to use,
+** modify, copy, or redistribute it subject to the terms and conditions
+** of the GNU General Public License v.2.
+**
+*******************************************************************************
+******************************************************************************/
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/configfs.h>
+#include <linux/slab.h>
+#include <linux/in.h>
+#include <linux/in6.h>
+#include <linux/dlmconstants.h>
+#include <net/ipv6.h>
+#include <net/sock.h>
+
+#include "config.h"
+#include "lowcomms.h"
+
+/*
+ * /config/dlm/<cluster>/spaces/<space>/nodes/<node>/nodeid
+ * /config/dlm/<cluster>/spaces/<space>/nodes/<node>/weight
+ * /config/dlm/<cluster>/comms/<comm>/nodeid
+ * /config/dlm/<cluster>/comms/<comm>/local
+ * /config/dlm/<cluster>/comms/<comm>/addr (write only)
+ * /config/dlm/<cluster>/comms/<comm>/addr_list (read only)
+ * The <cluster> level is useless, but I haven't figured out how to avoid it.
+ */
+
+static struct config_group *space_list;
+static struct config_group *comm_list;
+static struct dlm_comm *local_comm;
+static uint32_t dlm_comm_count;
+
+struct dlm_clusters;
+struct dlm_cluster;
+struct dlm_spaces;
+struct dlm_space;
+struct dlm_comms;
+struct dlm_comm;
+struct dlm_nodes;
+struct dlm_node;
+
+static struct config_group *make_cluster(struct config_group *, const char *);
+static void drop_cluster(struct config_group *, struct config_item *);
+static void release_cluster(struct config_item *);
+static struct config_group *make_space(struct config_group *, const char *);
+static void drop_space(struct config_group *, struct config_item *);
+static void release_space(struct config_item *);
+static struct config_item *make_comm(struct config_group *, const char *);
+static void drop_comm(struct config_group *, struct config_item *);
+static void release_comm(struct config_item *);
+static struct config_item *make_node(struct config_group *, const char *);
+static void drop_node(struct config_group *, struct config_item *);
+static void release_node(struct config_item *);
+
+static ssize_t show_cluster(struct config_item *i, struct configfs_attribute *a,
+ char *buf);
+static ssize_t store_cluster(struct config_item *i,
+ struct configfs_attribute *a,
+ const char *buf, size_t len);
+static ssize_t show_comm(struct config_item *i, struct configfs_attribute *a,
+ char *buf);
+static ssize_t store_comm(struct config_item *i, struct configfs_attribute *a,
+ const char *buf, size_t len);
+static ssize_t show_node(struct config_item *i, struct configfs_attribute *a,
+ char *buf);
+static ssize_t store_node(struct config_item *i, struct configfs_attribute *a,
+ const char *buf, size_t len);
+
+static ssize_t comm_nodeid_read(struct dlm_comm *cm, char *buf);
+static ssize_t comm_nodeid_write(struct dlm_comm *cm, const char *buf,
+ size_t len);
+static ssize_t comm_local_read(struct dlm_comm *cm, char *buf);
+static ssize_t comm_local_write(struct dlm_comm *cm, const char *buf,
+ size_t len);
+static ssize_t comm_addr_write(struct dlm_comm *cm, const char *buf,
+ size_t len);
+static ssize_t comm_addr_list_read(struct dlm_comm *cm, char *buf);
+static ssize_t node_nodeid_read(struct dlm_node *nd, char *buf);
+static ssize_t node_nodeid_write(struct dlm_node *nd, const char *buf,
+ size_t len);
+static ssize_t node_weight_read(struct dlm_node *nd, char *buf);
+static ssize_t node_weight_write(struct dlm_node *nd, const char *buf,
+ size_t len);
+
+struct dlm_cluster {
+ struct config_group group;
+ unsigned int cl_tcp_port;
+ unsigned int cl_buffer_size;
+ unsigned int cl_rsbtbl_size;
+ unsigned int cl_recover_timer;
+ unsigned int cl_toss_secs;
+ unsigned int cl_scan_secs;
+ unsigned int cl_log_debug;
+ unsigned int cl_protocol;
+ unsigned int cl_timewarn_cs;
+ unsigned int cl_waitwarn_us;
+ unsigned int cl_new_rsb_count;
+ unsigned int cl_recover_callbacks;
+ char cl_cluster_name[DLM_LOCKSPACE_LEN];
+};
+
+enum {
+ CLUSTER_ATTR_TCP_PORT = 0,
+ CLUSTER_ATTR_BUFFER_SIZE,
+ CLUSTER_ATTR_RSBTBL_SIZE,
+ CLUSTER_ATTR_RECOVER_TIMER,
+ CLUSTER_ATTR_TOSS_SECS,
+ CLUSTER_ATTR_SCAN_SECS,
+ CLUSTER_ATTR_LOG_DEBUG,
+ CLUSTER_ATTR_PROTOCOL,
+ CLUSTER_ATTR_TIMEWARN_CS,
+ CLUSTER_ATTR_WAITWARN_US,
+ CLUSTER_ATTR_NEW_RSB_COUNT,
+ CLUSTER_ATTR_RECOVER_CALLBACKS,
+ CLUSTER_ATTR_CLUSTER_NAME,
+};
+
+struct cluster_attribute {
+ struct configfs_attribute attr;
+ ssize_t (*show)(struct dlm_cluster *, char *);
+ ssize_t (*store)(struct dlm_cluster *, const char *, size_t);
+};
+
+static ssize_t cluster_cluster_name_read(struct dlm_cluster *cl, char *buf)
+{
+ return sprintf(buf, "%s\n", cl->cl_cluster_name);
+}
+
+static ssize_t cluster_cluster_name_write(struct dlm_cluster *cl,
+ const char *buf, size_t len)
+{
+ strlcpy(dlm_config.ci_cluster_name, buf,
+ sizeof(dlm_config.ci_cluster_name));
+ strlcpy(cl->cl_cluster_name, buf, sizeof(cl->cl_cluster_name));
+ return len;
+}
+
+static struct cluster_attribute cluster_attr_cluster_name = {
+ .attr = { .ca_owner = THIS_MODULE,
+ .ca_name = "cluster_name",
+ .ca_mode = S_IRUGO | S_IWUSR },
+ .show = cluster_cluster_name_read,
+ .store = cluster_cluster_name_write,
+};
+
+static ssize_t cluster_set(struct dlm_cluster *cl, unsigned int *cl_field,
+ int *info_field, int check_zero,
+ const char *buf, size_t len)
+{
+ unsigned int x;
+ int rc;
+
+ if (!capable(CAP_SYS_ADMIN))
+ return -EPERM;
+ rc = kstrtouint(buf, 0, &x);
+ if (rc)
+ return rc;
+
+ if (check_zero && !x)
+ return -EINVAL;
+
+ *cl_field = x;
+ *info_field = x;
+
+ return len;
+}
+
+#define CLUSTER_ATTR(name, check_zero) \
+static ssize_t name##_write(struct dlm_cluster *cl, const char *buf, size_t len) \
+{ \
+ return cluster_set(cl, &cl->cl_##name, &dlm_config.ci_##name, \
+ check_zero, buf, len); \
+} \
+static ssize_t name##_read(struct dlm_cluster *cl, char *buf) \
+{ \
+ return snprintf(buf, PAGE_SIZE, "%u\n", cl->cl_##name); \
+} \
+static struct cluster_attribute cluster_attr_##name = \
+__CONFIGFS_ATTR(name, 0644, name##_read, name##_write)
+
+CLUSTER_ATTR(tcp_port, 1);
+CLUSTER_ATTR(buffer_size, 1);
+CLUSTER_ATTR(rsbtbl_size, 1);
+CLUSTER_ATTR(recover_timer, 1);
+CLUSTER_ATTR(toss_secs, 1);
+CLUSTER_ATTR(scan_secs, 1);
+CLUSTER_ATTR(log_debug, 0);
+CLUSTER_ATTR(protocol, 0);
+CLUSTER_ATTR(timewarn_cs, 1);
+CLUSTER_ATTR(waitwarn_us, 0);
+CLUSTER_ATTR(new_rsb_count, 0);
+CLUSTER_ATTR(recover_callbacks, 0);
+
+static struct configfs_attribute *cluster_attrs[] = {
+ [CLUSTER_ATTR_TCP_PORT] = &cluster_attr_tcp_port.attr,
+ [CLUSTER_ATTR_BUFFER_SIZE] = &cluster_attr_buffer_size.attr,
+ [CLUSTER_ATTR_RSBTBL_SIZE] = &cluster_attr_rsbtbl_size.attr,
+ [CLUSTER_ATTR_RECOVER_TIMER] = &cluster_attr_recover_timer.attr,
+ [CLUSTER_ATTR_TOSS_SECS] = &cluster_attr_toss_secs.attr,
+ [CLUSTER_ATTR_SCAN_SECS] = &cluster_attr_scan_secs.attr,
+ [CLUSTER_ATTR_LOG_DEBUG] = &cluster_attr_log_debug.attr,
+ [CLUSTER_ATTR_PROTOCOL] = &cluster_attr_protocol.attr,
+ [CLUSTER_ATTR_TIMEWARN_CS] = &cluster_attr_timewarn_cs.attr,
+ [CLUSTER_ATTR_WAITWARN_US] = &cluster_attr_waitwarn_us.attr,
+ [CLUSTER_ATTR_NEW_RSB_COUNT] = &cluster_attr_new_rsb_count.attr,
+ [CLUSTER_ATTR_RECOVER_CALLBACKS] = &cluster_attr_recover_callbacks.attr,
+ [CLUSTER_ATTR_CLUSTER_NAME] = &cluster_attr_cluster_name.attr,
+ NULL,
+};
+
+enum {
+ COMM_ATTR_NODEID = 0,
+ COMM_ATTR_LOCAL,
+ COMM_ATTR_ADDR,
+ COMM_ATTR_ADDR_LIST,
+};
+
+struct comm_attribute {
+ struct configfs_attribute attr;
+ ssize_t (*show)(struct dlm_comm *, char *);
+ ssize_t (*store)(struct dlm_comm *, const char *, size_t);
+};
+
+static struct comm_attribute comm_attr_nodeid = {
+ .attr = { .ca_owner = THIS_MODULE,
+ .ca_name = "nodeid",
+ .ca_mode = S_IRUGO | S_IWUSR },
+ .show = comm_nodeid_read,
+ .store = comm_nodeid_write,
+};
+
+static struct comm_attribute comm_attr_local = {
+ .attr = { .ca_owner = THIS_MODULE,
+ .ca_name = "local",
+ .ca_mode = S_IRUGO | S_IWUSR },
+ .show = comm_local_read,
+ .store = comm_local_write,
+};
+
+static struct comm_attribute comm_attr_addr = {
+ .attr = { .ca_owner = THIS_MODULE,
+ .ca_name = "addr",
+ .ca_mode = S_IWUSR },
+ .store = comm_addr_write,
+};
+
+static struct comm_attribute comm_attr_addr_list = {
+ .attr = { .ca_owner = THIS_MODULE,
+ .ca_name = "addr_list",
+ .ca_mode = S_IRUGO },
+ .show = comm_addr_list_read,
+};
+
+static struct configfs_attribute *comm_attrs[] = {
+ [COMM_ATTR_NODEID] = &comm_attr_nodeid.attr,
+ [COMM_ATTR_LOCAL] = &comm_attr_local.attr,
+ [COMM_ATTR_ADDR] = &comm_attr_addr.attr,
+ [COMM_ATTR_ADDR_LIST] = &comm_attr_addr_list.attr,
+ NULL,
+};
+
+enum {
+ NODE_ATTR_NODEID = 0,
+ NODE_ATTR_WEIGHT,
+};
+
+struct node_attribute {
+ struct configfs_attribute attr;
+ ssize_t (*show)(struct dlm_node *, char *);
+ ssize_t (*store)(struct dlm_node *, const char *, size_t);
+};
+
+static struct node_attribute node_attr_nodeid = {
+ .attr = { .ca_owner = THIS_MODULE,
+ .ca_name = "nodeid",
+ .ca_mode = S_IRUGO | S_IWUSR },
+ .show = node_nodeid_read,
+ .store = node_nodeid_write,
+};
+
+static struct node_attribute node_attr_weight = {
+ .attr = { .ca_owner = THIS_MODULE,
+ .ca_name = "weight",
+ .ca_mode = S_IRUGO | S_IWUSR },
+ .show = node_weight_read,
+ .store = node_weight_write,
+};
+
+static struct configfs_attribute *node_attrs[] = {
+ [NODE_ATTR_NODEID] = &node_attr_nodeid.attr,
+ [NODE_ATTR_WEIGHT] = &node_attr_weight.attr,
+ NULL,
+};
+
+struct dlm_clusters {
+ struct configfs_subsystem subsys;
+};
+
+struct dlm_spaces {
+ struct config_group ss_group;
+};
+
+struct dlm_space {
+ struct config_group group;
+ struct list_head members;
+ struct mutex members_lock;
+ int members_count;
+};
+
+struct dlm_comms {
+ struct config_group cs_group;
+};
+
+struct dlm_comm {
+ struct config_item item;
+ int seq;
+ int nodeid;
+ int local;
+ int addr_count;
+ struct sockaddr_storage *addr[DLM_MAX_ADDR_COUNT];
+};
+
+struct dlm_nodes {
+ struct config_group ns_group;
+};
+
+struct dlm_node {
+ struct config_item item;
+ struct list_head list; /* space->members */
+ int nodeid;
+ int weight;
+ int new;
+ int comm_seq; /* copy of cm->seq when nd->nodeid is set */
+};
+
+static struct configfs_group_operations clusters_ops = {
+ .make_group = make_cluster,
+ .drop_item = drop_cluster,
+};
+
+static struct configfs_item_operations cluster_ops = {
+ .release = release_cluster,
+ .show_attribute = show_cluster,
+ .store_attribute = store_cluster,
+};
+
+static struct configfs_group_operations spaces_ops = {
+ .make_group = make_space,
+ .drop_item = drop_space,
+};
+
+static struct configfs_item_operations space_ops = {
+ .release = release_space,
+};
+
+static struct configfs_group_operations comms_ops = {
+ .make_item = make_comm,
+ .drop_item = drop_comm,
+};
+
+static struct configfs_item_operations comm_ops = {
+ .release = release_comm,
+ .show_attribute = show_comm,
+ .store_attribute = store_comm,
+};
+
+static struct configfs_group_operations nodes_ops = {
+ .make_item = make_node,
+ .drop_item = drop_node,
+};
+
+static struct configfs_item_operations node_ops = {
+ .release = release_node,
+ .show_attribute = show_node,
+ .store_attribute = store_node,
+};
+
+static struct config_item_type clusters_type = {
+ .ct_group_ops = &clusters_ops,
+ .ct_owner = THIS_MODULE,
+};
+
+static struct config_item_type cluster_type = {
+ .ct_item_ops = &cluster_ops,
+ .ct_attrs = cluster_attrs,
+ .ct_owner = THIS_MODULE,
+};
+
+static struct config_item_type spaces_type = {
+ .ct_group_ops = &spaces_ops,
+ .ct_owner = THIS_MODULE,
+};
+
+static struct config_item_type space_type = {
+ .ct_item_ops = &space_ops,
+ .ct_owner = THIS_MODULE,
+};
+
+static struct config_item_type comms_type = {
+ .ct_group_ops = &comms_ops,
+ .ct_owner = THIS_MODULE,
+};
+
+static struct config_item_type comm_type = {
+ .ct_item_ops = &comm_ops,
+ .ct_attrs = comm_attrs,
+ .ct_owner = THIS_MODULE,
+};
+
+static struct config_item_type nodes_type = {
+ .ct_group_ops = &nodes_ops,
+ .ct_owner = THIS_MODULE,
+};
+
+static struct config_item_type node_type = {
+ .ct_item_ops = &node_ops,
+ .ct_attrs = node_attrs,
+ .ct_owner = THIS_MODULE,
+};
+
+static struct dlm_cluster *config_item_to_cluster(struct config_item *i)
+{
+ return i ? container_of(to_config_group(i), struct dlm_cluster, group) :
+ NULL;
+}
+
+static struct dlm_space *config_item_to_space(struct config_item *i)
+{
+ return i ? container_of(to_config_group(i), struct dlm_space, group) :
+ NULL;
+}
+
+static struct dlm_comm *config_item_to_comm(struct config_item *i)
+{
+ return i ? container_of(i, struct dlm_comm, item) : NULL;
+}
+
+static struct dlm_node *config_item_to_node(struct config_item *i)
+{
+ return i ? container_of(i, struct dlm_node, item) : NULL;
+}
+
+static struct config_group *make_cluster(struct config_group *g,
+ const char *name)
+{
+ struct dlm_cluster *cl = NULL;
+ struct dlm_spaces *sps = NULL;
+ struct dlm_comms *cms = NULL;
+ void *gps = NULL;
+
+ cl = kzalloc(sizeof(struct dlm_cluster), GFP_NOFS);
+ gps = kcalloc(3, sizeof(struct config_group *), GFP_NOFS);
+ sps = kzalloc(sizeof(struct dlm_spaces), GFP_NOFS);
+ cms = kzalloc(sizeof(struct dlm_comms), GFP_NOFS);
+
+ if (!cl || !gps || !sps || !cms)
+ goto fail;
+
+ config_group_init_type_name(&cl->group, name, &cluster_type);
+ config_group_init_type_name(&sps->ss_group, "spaces", &spaces_type);
+ config_group_init_type_name(&cms->cs_group, "comms", &comms_type);
+
+ cl->group.default_groups = gps;
+ cl->group.default_groups[0] = &sps->ss_group;
+ cl->group.default_groups[1] = &cms->cs_group;
+ cl->group.default_groups[2] = NULL;
+
+ cl->cl_tcp_port = dlm_config.ci_tcp_port;
+ cl->cl_buffer_size = dlm_config.ci_buffer_size;
+ cl->cl_rsbtbl_size = dlm_config.ci_rsbtbl_size;
+ cl->cl_recover_timer = dlm_config.ci_recover_timer;
+ cl->cl_toss_secs = dlm_config.ci_toss_secs;
+ cl->cl_scan_secs = dlm_config.ci_scan_secs;
+ cl->cl_log_debug = dlm_config.ci_log_debug;
+ cl->cl_protocol = dlm_config.ci_protocol;
+ cl->cl_timewarn_cs = dlm_config.ci_timewarn_cs;
+ cl->cl_waitwarn_us = dlm_config.ci_waitwarn_us;
+ cl->cl_new_rsb_count = dlm_config.ci_new_rsb_count;
+ cl->cl_recover_callbacks = dlm_config.ci_recover_callbacks;
+ memcpy(cl->cl_cluster_name, dlm_config.ci_cluster_name,
+ DLM_LOCKSPACE_LEN);
+
+ space_list = &sps->ss_group;
+ comm_list = &cms->cs_group;
+ return &cl->group;
+
+ fail:
+ kfree(cl);
+ kfree(gps);
+ kfree(sps);
+ kfree(cms);
+ return ERR_PTR(-ENOMEM);
+}
+
+static void drop_cluster(struct config_group *g, struct config_item *i)
+{
+ struct dlm_cluster *cl = config_item_to_cluster(i);
+ struct config_item *tmp;
+ int j;
+
+ for (j = 0; cl->group.default_groups[j]; j++) {
+ tmp = &cl->group.default_groups[j]->cg_item;
+ cl->group.default_groups[j] = NULL;
+ config_item_put(tmp);
+ }
+
+ space_list = NULL;
+ comm_list = NULL;
+
+ config_item_put(i);
+}
+
+static void release_cluster(struct config_item *i)
+{
+ struct dlm_cluster *cl = config_item_to_cluster(i);
+ kfree(cl->group.default_groups);
+ kfree(cl);
+}
+
+static struct config_group *make_space(struct config_group *g, const char *name)
+{
+ struct dlm_space *sp = NULL;
+ struct dlm_nodes *nds = NULL;
+ void *gps = NULL;
+
+ sp = kzalloc(sizeof(struct dlm_space), GFP_NOFS);
+ gps = kcalloc(2, sizeof(struct config_group *), GFP_NOFS);
+ nds = kzalloc(sizeof(struct dlm_nodes), GFP_NOFS);
+
+ if (!sp || !gps || !nds)
+ goto fail;
+
+ config_group_init_type_name(&sp->group, name, &space_type);
+ config_group_init_type_name(&nds->ns_group, "nodes", &nodes_type);
+
+ sp->group.default_groups = gps;
+ sp->group.default_groups[0] = &nds->ns_group;
+ sp->group.default_groups[1] = NULL;
+
+ INIT_LIST_HEAD(&sp->members);
+ mutex_init(&sp->members_lock);
+ sp->members_count = 0;
+ return &sp->group;
+
+ fail:
+ kfree(sp);
+ kfree(gps);
+ kfree(nds);
+ return ERR_PTR(-ENOMEM);
+}
+
+static void drop_space(struct config_group *g, struct config_item *i)
+{
+ struct dlm_space *sp = config_item_to_space(i);
+ struct config_item *tmp;
+ int j;
+
+ /* assert list_empty(&sp->members) */
+
+ for (j = 0; sp->group.default_groups[j]; j++) {
+ tmp = &sp->group.default_groups[j]->cg_item;
+ sp->group.default_groups[j] = NULL;
+ config_item_put(tmp);
+ }
+
+ config_item_put(i);
+}
+
+static void release_space(struct config_item *i)
+{
+ struct dlm_space *sp = config_item_to_space(i);
+ kfree(sp->group.default_groups);
+ kfree(sp);
+}
+
+static struct config_item *make_comm(struct config_group *g, const char *name)
+{
+ struct dlm_comm *cm;
+
+ cm = kzalloc(sizeof(struct dlm_comm), GFP_NOFS);
+ if (!cm)
+ return ERR_PTR(-ENOMEM);
+
+ config_item_init_type_name(&cm->item, name, &comm_type);
+
+ cm->seq = dlm_comm_count++;
+ if (!cm->seq)
+ cm->seq = dlm_comm_count++;
+
+ cm->nodeid = -1;
+ cm->local = 0;
+ cm->addr_count = 0;
+ return &cm->item;
+}
+
+static void drop_comm(struct config_group *g, struct config_item *i)
+{
+ struct dlm_comm *cm = config_item_to_comm(i);
+ if (local_comm == cm)
+ local_comm = NULL;
+ dlm_lowcomms_close(cm->nodeid);
+ while (cm->addr_count--)
+ kfree(cm->addr[cm->addr_count]);
+ config_item_put(i);
+}
+
+static void release_comm(struct config_item *i)
+{
+ struct dlm_comm *cm = config_item_to_comm(i);
+ kfree(cm);
+}
+
+static struct config_item *make_node(struct config_group *g, const char *name)
+{
+ struct dlm_space *sp = config_item_to_space(g->cg_item.ci_parent);
+ struct dlm_node *nd;
+
+ nd = kzalloc(sizeof(struct dlm_node), GFP_NOFS);
+ if (!nd)
+ return ERR_PTR(-ENOMEM);
+
+ config_item_init_type_name(&nd->item, name, &node_type);
+ nd->nodeid = -1;
+ nd->weight = 1; /* default weight of 1 if none is set */
+ nd->new = 1; /* set to 0 once it's been read by dlm_nodeid_list() */
+
+ mutex_lock(&sp->members_lock);
+ list_add(&nd->list, &sp->members);
+ sp->members_count++;
+ mutex_unlock(&sp->members_lock);
+
+ return &nd->item;
+}
+
+static void drop_node(struct config_group *g, struct config_item *i)
+{
+ struct dlm_space *sp = config_item_to_space(g->cg_item.ci_parent);
+ struct dlm_node *nd = config_item_to_node(i);
+
+ mutex_lock(&sp->members_lock);
+ list_del(&nd->list);
+ sp->members_count--;
+ mutex_unlock(&sp->members_lock);
+
+ config_item_put(i);
+}
+
+static void release_node(struct config_item *i)
+{
+ struct dlm_node *nd = config_item_to_node(i);
+ kfree(nd);
+}
+
+static struct dlm_clusters clusters_root = {
+ .subsys = {
+ .su_group = {
+ .cg_item = {
+ .ci_namebuf = "dlm",
+ .ci_type = &clusters_type,
+ },
+ },
+ },
+};
+
+int __init dlm_config_init(void)
+{
+ config_group_init(&clusters_root.subsys.su_group);
+ mutex_init(&clusters_root.subsys.su_mutex);
+ return configfs_register_subsystem(&clusters_root.subsys);
+}
+
+void dlm_config_exit(void)
+{
+ configfs_unregister_subsystem(&clusters_root.subsys);
+}
+
+/*
+ * Functions for user space to read/write attributes
+ */
+
+static ssize_t show_cluster(struct config_item *i, struct configfs_attribute *a,
+ char *buf)
+{
+ struct dlm_cluster *cl = config_item_to_cluster(i);
+ struct cluster_attribute *cla =
+ container_of(a, struct cluster_attribute, attr);
+ return cla->show ? cla->show(cl, buf) : 0;
+}
+
+static ssize_t store_cluster(struct config_item *i,
+ struct configfs_attribute *a,
+ const char *buf, size_t len)
+{
+ struct dlm_cluster *cl = config_item_to_cluster(i);
+ struct cluster_attribute *cla =
+ container_of(a, struct cluster_attribute, attr);
+ return cla->store ? cla->store(cl, buf, len) : -EINVAL;
+}
+
+static ssize_t show_comm(struct config_item *i, struct configfs_attribute *a,
+ char *buf)
+{
+ struct dlm_comm *cm = config_item_to_comm(i);
+ struct comm_attribute *cma =
+ container_of(a, struct comm_attribute, attr);
+ return cma->show ? cma->show(cm, buf) : 0;
+}
+
+static ssize_t store_comm(struct config_item *i, struct configfs_attribute *a,
+ const char *buf, size_t len)
+{
+ struct dlm_comm *cm = config_item_to_comm(i);
+ struct comm_attribute *cma =
+ container_of(a, struct comm_attribute, attr);
+ return cma->store ? cma->store(cm, buf, len) : -EINVAL;
+}
+
+static ssize_t comm_nodeid_read(struct dlm_comm *cm, char *buf)
+{
+ return sprintf(buf, "%d\n", cm->nodeid);
+}
+
+static ssize_t comm_nodeid_write(struct dlm_comm *cm, const char *buf,
+ size_t len)
+{
+ int rc = kstrtoint(buf, 0, &cm->nodeid);
+
+ if (rc)
+ return rc;
+ return len;
+}
+
+static ssize_t comm_local_read(struct dlm_comm *cm, char *buf)
+{
+ return sprintf(buf, "%d\n", cm->local);
+}
+
+static ssize_t comm_local_write(struct dlm_comm *cm, const char *buf,
+ size_t len)
+{
+ int rc = kstrtoint(buf, 0, &cm->local);
+
+ if (rc)
+ return rc;
+ if (cm->local && !local_comm)
+ local_comm = cm;
+ return len;
+}
+
+static ssize_t comm_addr_write(struct dlm_comm *cm, const char *buf, size_t len)
+{
+ struct sockaddr_storage *addr;
+ int rv;
+
+ if (len != sizeof(struct sockaddr_storage))
+ return -EINVAL;
+
+ if (cm->addr_count >= DLM_MAX_ADDR_COUNT)
+ return -ENOSPC;
+
+ addr = kzalloc(sizeof(*addr), GFP_NOFS);
+ if (!addr)
+ return -ENOMEM;
+
+ memcpy(addr, buf, len);
+
+ rv = dlm_lowcomms_addr(cm->nodeid, addr, len);
+ if (rv) {
+ kfree(addr);
+ return rv;
+ }
+
+ cm->addr[cm->addr_count++] = addr;
+ return len;
+}
+
+static ssize_t comm_addr_list_read(struct dlm_comm *cm, char *buf)
+{
+ ssize_t s;
+ ssize_t allowance;
+ int i;
+ struct sockaddr_storage *addr;
+ struct sockaddr_in *addr_in;
+ struct sockaddr_in6 *addr_in6;
+
+ /* Taken from ip6_addr_string() defined in lib/vsprintf.c */
+ char buf0[sizeof("AF_INET6 xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:255.255.255.255\n")];
+
+
+ /* Derived from SIMPLE_ATTR_SIZE of fs/configfs/file.c */
+ allowance = 4096;
+ buf[0] = '\0';
+
+ for (i = 0; i < cm->addr_count; i++) {
+ addr = cm->addr[i];
+
+ switch(addr->ss_family) {
+ case AF_INET:
+ addr_in = (struct sockaddr_in *)addr;
+ s = sprintf(buf0, "AF_INET %pI4\n", &addr_in->sin_addr.s_addr);
+ break;
+ case AF_INET6:
+ addr_in6 = (struct sockaddr_in6 *)addr;
+ s = sprintf(buf0, "AF_INET6 %pI6\n", &addr_in6->sin6_addr);
+ break;
+ default:
+ s = sprintf(buf0, "%s\n", "<UNKNOWN>");
+ break;
+ }
+ allowance -= s;
+ if (allowance >= 0)
+ strcat(buf, buf0);
+ else {
+ allowance += s;
+ break;
+ }
+ }
+ return 4096 - allowance;
+}
+
+static ssize_t show_node(struct config_item *i, struct configfs_attribute *a,
+ char *buf)
+{
+ struct dlm_node *nd = config_item_to_node(i);
+ struct node_attribute *nda =
+ container_of(a, struct node_attribute, attr);
+ return nda->show ? nda->show(nd, buf) : 0;
+}
+
+static ssize_t store_node(struct config_item *i, struct configfs_attribute *a,
+ const char *buf, size_t len)
+{
+ struct dlm_node *nd = config_item_to_node(i);
+ struct node_attribute *nda =
+ container_of(a, struct node_attribute, attr);
+ return nda->store ? nda->store(nd, buf, len) : -EINVAL;
+}
+
+static ssize_t node_nodeid_read(struct dlm_node *nd, char *buf)
+{
+ return sprintf(buf, "%d\n", nd->nodeid);
+}
+
+static ssize_t node_nodeid_write(struct dlm_node *nd, const char *buf,
+ size_t len)
+{
+ uint32_t seq = 0;
+ int rc = kstrtoint(buf, 0, &nd->nodeid);
+
+ if (rc)
+ return rc;
+ dlm_comm_seq(nd->nodeid, &seq);
+ nd->comm_seq = seq;
+ return len;
+}
+
+static ssize_t node_weight_read(struct dlm_node *nd, char *buf)
+{
+ return sprintf(buf, "%d\n", nd->weight);
+}
+
+static ssize_t node_weight_write(struct dlm_node *nd, const char *buf,
+ size_t len)
+{
+ int rc = kstrtoint(buf, 0, &nd->weight);
+
+ if (rc)
+ return rc;
+ return len;
+}
+
+/*
+ * Functions for the dlm to get the info that's been configured
+ */
+
+static struct dlm_space *get_space(char *name)
+{
+ struct config_item *i;
+
+ if (!space_list)
+ return NULL;
+
+ mutex_lock(&space_list->cg_subsys->su_mutex);
+ i = config_group_find_item(space_list, name);
+ mutex_unlock(&space_list->cg_subsys->su_mutex);
+
+ return config_item_to_space(i);
+}
+
+static void put_space(struct dlm_space *sp)
+{
+ config_item_put(&sp->group.cg_item);
+}
+
+static struct dlm_comm *get_comm(int nodeid)
+{
+ struct config_item *i;
+ struct dlm_comm *cm = NULL;
+ int found = 0;
+
+ if (!comm_list)
+ return NULL;
+
+ mutex_lock(&clusters_root.subsys.su_mutex);
+
+ list_for_each_entry(i, &comm_list->cg_children, ci_entry) {
+ cm = config_item_to_comm(i);
+
+ if (cm->nodeid != nodeid)
+ continue;
+ found = 1;
+ config_item_get(i);
+ break;
+ }
+ mutex_unlock(&clusters_root.subsys.su_mutex);
+
+ if (!found)
+ cm = NULL;
+ return cm;
+}
+
+static void put_comm(struct dlm_comm *cm)
+{
+ config_item_put(&cm->item);
+}
+
+/* caller must free mem */
+int dlm_config_nodes(char *lsname, struct dlm_config_node **nodes_out,
+ int *count_out)
+{
+ struct dlm_space *sp;
+ struct dlm_node *nd;
+ struct dlm_config_node *nodes, *node;
+ int rv, count;
+
+ sp = get_space(lsname);
+ if (!sp)
+ return -EEXIST;
+
+ mutex_lock(&sp->members_lock);
+ if (!sp->members_count) {
+ rv = -EINVAL;
+ printk(KERN_ERR "dlm: zero members_count\n");
+ goto out;
+ }
+
+ count = sp->members_count;
+
+ nodes = kcalloc(count, sizeof(struct dlm_config_node), GFP_NOFS);
+ if (!nodes) {
+ rv = -ENOMEM;
+ goto out;
+ }
+
+ node = nodes;
+ list_for_each_entry(nd, &sp->members, list) {
+ node->nodeid = nd->nodeid;
+ node->weight = nd->weight;
+ node->new = nd->new;
+ node->comm_seq = nd->comm_seq;
+ node++;
+
+ nd->new = 0;
+ }
+
+ *count_out = count;
+ *nodes_out = nodes;
+ rv = 0;
+ out:
+ mutex_unlock(&sp->members_lock);
+ put_space(sp);
+ return rv;
+}
+
+int dlm_comm_seq(int nodeid, uint32_t *seq)
+{
+ struct dlm_comm *cm = get_comm(nodeid);
+ if (!cm)
+ return -EEXIST;
+ *seq = cm->seq;
+ put_comm(cm);
+ return 0;
+}
+
+int dlm_our_nodeid(void)
+{
+ return local_comm ? local_comm->nodeid : 0;
+}
+
+/* num 0 is first addr, num 1 is second addr */
+int dlm_our_addr(struct sockaddr_storage *addr, int num)
+{
+ if (!local_comm)
+ return -1;
+ if (num + 1 > local_comm->addr_count)
+ return -1;
+ memcpy(addr, local_comm->addr[num], sizeof(*addr));
+ return 0;
+}
+
+/* Config file defaults */
+#define DEFAULT_TCP_PORT 21064
+#define DEFAULT_BUFFER_SIZE 4096
+#define DEFAULT_RSBTBL_SIZE 1024
+#define DEFAULT_RECOVER_TIMER 5
+#define DEFAULT_TOSS_SECS 10
+#define DEFAULT_SCAN_SECS 5
+#define DEFAULT_LOG_DEBUG 0
+#define DEFAULT_PROTOCOL 0
+#define DEFAULT_TIMEWARN_CS 500 /* 5 sec = 500 centiseconds */
+#define DEFAULT_WAITWARN_US 0
+#define DEFAULT_NEW_RSB_COUNT 128
+#define DEFAULT_RECOVER_CALLBACKS 0
+#define DEFAULT_CLUSTER_NAME ""
+
+struct dlm_config_info dlm_config = {
+ .ci_tcp_port = DEFAULT_TCP_PORT,
+ .ci_buffer_size = DEFAULT_BUFFER_SIZE,
+ .ci_rsbtbl_size = DEFAULT_RSBTBL_SIZE,
+ .ci_recover_timer = DEFAULT_RECOVER_TIMER,
+ .ci_toss_secs = DEFAULT_TOSS_SECS,
+ .ci_scan_secs = DEFAULT_SCAN_SECS,
+ .ci_log_debug = DEFAULT_LOG_DEBUG,
+ .ci_protocol = DEFAULT_PROTOCOL,
+ .ci_timewarn_cs = DEFAULT_TIMEWARN_CS,
+ .ci_waitwarn_us = DEFAULT_WAITWARN_US,
+ .ci_new_rsb_count = DEFAULT_NEW_RSB_COUNT,
+ .ci_recover_callbacks = DEFAULT_RECOVER_CALLBACKS,
+ .ci_cluster_name = DEFAULT_CLUSTER_NAME
+};
+
Code Review / kvmfornfv.git / blobdiff