| /****************************************************************************** |
| ******************************************************************************* |
| ** |
| ** Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. |
| ** Copyright (C) 2004-2008 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/in.h> |
| #include <linux/in6.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 |
| * 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; |
| |
| 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 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_lkbtbl_size; |
| unsigned int cl_dirtbl_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; |
| }; |
| |
| enum { |
| CLUSTER_ATTR_TCP_PORT = 0, |
| CLUSTER_ATTR_BUFFER_SIZE, |
| CLUSTER_ATTR_RSBTBL_SIZE, |
| CLUSTER_ATTR_LKBTBL_SIZE, |
| CLUSTER_ATTR_DIRTBL_SIZE, |
| CLUSTER_ATTR_RECOVER_TIMER, |
| CLUSTER_ATTR_TOSS_SECS, |
| CLUSTER_ATTR_SCAN_SECS, |
| CLUSTER_ATTR_LOG_DEBUG, |
| CLUSTER_ATTR_PROTOCOL, |
| CLUSTER_ATTR_TIMEWARN_CS, |
| }; |
| |
| 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_set(struct dlm_cluster *cl, unsigned int *cl_field, |
| int *info_field, int check_zero, |
| const char *buf, size_t len) |
| { |
| unsigned int x; |
| |
| if (!capable(CAP_SYS_ADMIN)) |
| return -EACCES; |
| |
| x = simple_strtoul(buf, NULL, 0); |
| |
| 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(lkbtbl_size, 1); |
| CLUSTER_ATTR(dirtbl_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); |
| |
| 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_LKBTBL_SIZE] = &cluster_attr_lkbtbl_size.attr, |
| [CLUSTER_ATTR_DIRTBL_SIZE] = &cluster_attr_dirtbl_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, |
| NULL, |
| }; |
| |
| enum { |
| COMM_ATTR_NODEID = 0, |
| COMM_ATTR_LOCAL, |
| COMM_ATTR_ADDR, |
| }; |
| |
| 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_IRUGO | S_IWUSR }, |
| .store = comm_addr_write, |
| }; |
| |
| 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, |
| 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 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; |
| }; |
| |
| 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_KERNEL); |
| gps = kcalloc(3, sizeof(struct config_group *), GFP_KERNEL); |
| sps = kzalloc(sizeof(struct dlm_spaces), GFP_KERNEL); |
| cms = kzalloc(sizeof(struct dlm_comms), GFP_KERNEL); |
| |
| 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_lkbtbl_size = dlm_config.ci_lkbtbl_size; |
| cl->cl_dirtbl_size = dlm_config.ci_dirtbl_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; |
| |
| 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_KERNEL); |
| gps = kcalloc(2, sizeof(struct config_group *), GFP_KERNEL); |
| nds = kzalloc(sizeof(struct dlm_nodes), GFP_KERNEL); |
| |
| 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_KERNEL); |
| if (!cm) |
| return ERR_PTR(-ENOMEM); |
| |
| config_item_init_type_name(&cm->item, name, &comm_type); |
| 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_KERNEL); |
| 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) |
| { |
| cm->nodeid = simple_strtol(buf, NULL, 0); |
| 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) |
| { |
| cm->local= simple_strtol(buf, NULL, 0); |
| 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; |
| |
| if (len != sizeof(struct sockaddr_storage)) |
| return -EINVAL; |
| |
| if (cm->addr_count >= DLM_MAX_ADDR_COUNT) |
| return -ENOSPC; |
| |
| addr = kzalloc(sizeof(*addr), GFP_KERNEL); |
| if (!addr) |
| return -ENOMEM; |
| |
| memcpy(addr, buf, len); |
| cm->addr[cm->addr_count++] = addr; |
| return len; |
| } |
| |
| 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) |
| { |
| nd->nodeid = simple_strtol(buf, NULL, 0); |
| 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) |
| { |
| nd->weight = simple_strtol(buf, NULL, 0); |
| 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 int addr_compare(struct sockaddr_storage *x, struct sockaddr_storage *y) |
| { |
| switch (x->ss_family) { |
| case AF_INET: { |
| struct sockaddr_in *sinx = (struct sockaddr_in *)x; |
| struct sockaddr_in *siny = (struct sockaddr_in *)y; |
| if (sinx->sin_addr.s_addr != siny->sin_addr.s_addr) |
| return 0; |
| if (sinx->sin_port != siny->sin_port) |
| return 0; |
| break; |
| } |
| case AF_INET6: { |
| struct sockaddr_in6 *sinx = (struct sockaddr_in6 *)x; |
| struct sockaddr_in6 *siny = (struct sockaddr_in6 *)y; |
| if (!ipv6_addr_equal(&sinx->sin6_addr, &siny->sin6_addr)) |
| return 0; |
| if (sinx->sin6_port != siny->sin6_port) |
| return 0; |
| break; |
| } |
| default: |
| return 0; |
| } |
| return 1; |
| } |
| |
| static struct dlm_comm *get_comm(int nodeid, struct sockaddr_storage *addr) |
| { |
| 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 (nodeid) { |
| if (cm->nodeid != nodeid) |
| continue; |
| found = 1; |
| config_item_get(i); |
| break; |
| } else { |
| if (!cm->addr_count || !addr_compare(cm->addr[0], addr)) |
| 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_nodeid_list(char *lsname, int **ids_out, int *ids_count_out, |
| int **new_out, int *new_count_out) |
| { |
| struct dlm_space *sp; |
| struct dlm_node *nd; |
| int i = 0, rv = 0, ids_count = 0, new_count = 0; |
| int *ids, *new; |
| |
| 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; |
| } |
| |
| ids_count = sp->members_count; |
| |
| ids = kcalloc(ids_count, sizeof(int), GFP_KERNEL); |
| if (!ids) { |
| rv = -ENOMEM; |
| goto out; |
| } |
| |
| list_for_each_entry(nd, &sp->members, list) { |
| ids[i++] = nd->nodeid; |
| if (nd->new) |
| new_count++; |
| } |
| |
| if (ids_count != i) |
| printk(KERN_ERR "dlm: bad nodeid count %d %d\n", ids_count, i); |
| |
| if (!new_count) |
| goto out_ids; |
| |
| new = kcalloc(new_count, sizeof(int), GFP_KERNEL); |
| if (!new) { |
| kfree(ids); |
| rv = -ENOMEM; |
| goto out; |
| } |
| |
| i = 0; |
| list_for_each_entry(nd, &sp->members, list) { |
| if (nd->new) { |
| new[i++] = nd->nodeid; |
| nd->new = 0; |
| } |
| } |
| *new_count_out = new_count; |
| *new_out = new; |
| |
| out_ids: |
| *ids_count_out = ids_count; |
| *ids_out = ids; |
| out: |
| mutex_unlock(&sp->members_lock); |
| put_space(sp); |
| return rv; |
| } |
| |
| int dlm_node_weight(char *lsname, int nodeid) |
| { |
| struct dlm_space *sp; |
| struct dlm_node *nd; |
| int w = -EEXIST; |
| |
| sp = get_space(lsname); |
| if (!sp) |
| goto out; |
| |
| mutex_lock(&sp->members_lock); |
| list_for_each_entry(nd, &sp->members, list) { |
| if (nd->nodeid != nodeid) |
| continue; |
| w = nd->weight; |
| break; |
| } |
| mutex_unlock(&sp->members_lock); |
| put_space(sp); |
| out: |
| return w; |
| } |
| |
| int dlm_nodeid_to_addr(int nodeid, struct sockaddr_storage *addr) |
| { |
| struct dlm_comm *cm = get_comm(nodeid, NULL); |
| if (!cm) |
| return -EEXIST; |
| if (!cm->addr_count) |
| return -ENOENT; |
| memcpy(addr, cm->addr[0], sizeof(*addr)); |
| put_comm(cm); |
| return 0; |
| } |
| |
| int dlm_addr_to_nodeid(struct sockaddr_storage *addr, int *nodeid) |
| { |
| struct dlm_comm *cm = get_comm(0, addr); |
| if (!cm) |
| return -EEXIST; |
| *nodeid = cm->nodeid; |
| 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 256 |
| #define DEFAULT_LKBTBL_SIZE 1024 |
| #define DEFAULT_DIRTBL_SIZE 512 |
| #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 */ |
| |
| 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_lkbtbl_size = DEFAULT_LKBTBL_SIZE, |
| .ci_dirtbl_size = DEFAULT_DIRTBL_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 |
| }; |
| |