1 /******************************************************************************
2 *******************************************************************************
4 ** Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
5 ** Copyright (C) 2004-2011 Red Hat, Inc. All rights reserved.
7 ** This copyrighted material is made available to anyone wishing to use,
8 ** modify, copy, or redistribute it subject to the terms and conditions
9 ** of the GNU General Public License v.2.
11 *******************************************************************************
12 ******************************************************************************/
14 #include <linux/kernel.h>
15 #include <linux/module.h>
16 #include <linux/configfs.h>
17 #include <linux/slab.h>
19 #include <linux/in6.h>
20 #include <linux/dlmconstants.h>
28 * /config/dlm/<cluster>/spaces/<space>/nodes/<node>/nodeid
29 * /config/dlm/<cluster>/spaces/<space>/nodes/<node>/weight
30 * /config/dlm/<cluster>/comms/<comm>/nodeid
31 * /config/dlm/<cluster>/comms/<comm>/local
32 * /config/dlm/<cluster>/comms/<comm>/addr (write only)
33 * /config/dlm/<cluster>/comms/<comm>/addr_list (read only)
34 * The <cluster> level is useless, but I haven't figured out how to avoid it.
37 static struct config_group *space_list;
38 static struct config_group *comm_list;
39 static struct dlm_comm *local_comm;
40 static uint32_t dlm_comm_count;
51 static struct config_group *make_cluster(struct config_group *, const char *);
52 static void drop_cluster(struct config_group *, struct config_item *);
53 static void release_cluster(struct config_item *);
54 static struct config_group *make_space(struct config_group *, const char *);
55 static void drop_space(struct config_group *, struct config_item *);
56 static void release_space(struct config_item *);
57 static struct config_item *make_comm(struct config_group *, const char *);
58 static void drop_comm(struct config_group *, struct config_item *);
59 static void release_comm(struct config_item *);
60 static struct config_item *make_node(struct config_group *, const char *);
61 static void drop_node(struct config_group *, struct config_item *);
62 static void release_node(struct config_item *);
64 static struct configfs_attribute *comm_attrs[];
65 static struct configfs_attribute *node_attrs[];
68 struct config_group group;
69 unsigned int cl_tcp_port;
70 unsigned int cl_buffer_size;
71 unsigned int cl_rsbtbl_size;
72 unsigned int cl_recover_timer;
73 unsigned int cl_toss_secs;
74 unsigned int cl_scan_secs;
75 unsigned int cl_log_debug;
76 unsigned int cl_log_info;
77 unsigned int cl_protocol;
78 unsigned int cl_timewarn_cs;
79 unsigned int cl_waitwarn_us;
80 unsigned int cl_new_rsb_count;
81 unsigned int cl_recover_callbacks;
82 char cl_cluster_name[DLM_LOCKSPACE_LEN];
84 struct dlm_spaces *sps;
85 struct dlm_comms *cms;
88 static struct dlm_cluster *config_item_to_cluster(struct config_item *i)
90 return i ? container_of(to_config_group(i), struct dlm_cluster, group) :
95 CLUSTER_ATTR_TCP_PORT = 0,
96 CLUSTER_ATTR_BUFFER_SIZE,
97 CLUSTER_ATTR_RSBTBL_SIZE,
98 CLUSTER_ATTR_RECOVER_TIMER,
99 CLUSTER_ATTR_TOSS_SECS,
100 CLUSTER_ATTR_SCAN_SECS,
101 CLUSTER_ATTR_LOG_DEBUG,
102 CLUSTER_ATTR_LOG_INFO,
103 CLUSTER_ATTR_PROTOCOL,
104 CLUSTER_ATTR_TIMEWARN_CS,
105 CLUSTER_ATTR_WAITWARN_US,
106 CLUSTER_ATTR_NEW_RSB_COUNT,
107 CLUSTER_ATTR_RECOVER_CALLBACKS,
108 CLUSTER_ATTR_CLUSTER_NAME,
111 static ssize_t cluster_cluster_name_show(struct config_item *item, char *buf)
113 struct dlm_cluster *cl = config_item_to_cluster(item);
114 return sprintf(buf, "%s\n", cl->cl_cluster_name);
117 static ssize_t cluster_cluster_name_store(struct config_item *item,
118 const char *buf, size_t len)
120 struct dlm_cluster *cl = config_item_to_cluster(item);
122 strlcpy(dlm_config.ci_cluster_name, buf,
123 sizeof(dlm_config.ci_cluster_name));
124 strlcpy(cl->cl_cluster_name, buf, sizeof(cl->cl_cluster_name));
128 CONFIGFS_ATTR(cluster_, cluster_name);
130 static ssize_t cluster_set(struct dlm_cluster *cl, unsigned int *cl_field,
131 int *info_field, int check_zero,
132 const char *buf, size_t len)
137 if (!capable(CAP_SYS_ADMIN))
139 rc = kstrtouint(buf, 0, &x);
143 if (check_zero && !x)
152 #define CLUSTER_ATTR(name, check_zero) \
153 static ssize_t cluster_##name##_store(struct config_item *item, \
154 const char *buf, size_t len) \
156 struct dlm_cluster *cl = config_item_to_cluster(item); \
157 return cluster_set(cl, &cl->cl_##name, &dlm_config.ci_##name, \
158 check_zero, buf, len); \
160 static ssize_t cluster_##name##_show(struct config_item *item, char *buf) \
162 struct dlm_cluster *cl = config_item_to_cluster(item); \
163 return snprintf(buf, PAGE_SIZE, "%u\n", cl->cl_##name); \
165 CONFIGFS_ATTR(cluster_, name);
167 CLUSTER_ATTR(tcp_port, 1);
168 CLUSTER_ATTR(buffer_size, 1);
169 CLUSTER_ATTR(rsbtbl_size, 1);
170 CLUSTER_ATTR(recover_timer, 1);
171 CLUSTER_ATTR(toss_secs, 1);
172 CLUSTER_ATTR(scan_secs, 1);
173 CLUSTER_ATTR(log_debug, 0);
174 CLUSTER_ATTR(log_info, 0);
175 CLUSTER_ATTR(protocol, 0);
176 CLUSTER_ATTR(timewarn_cs, 1);
177 CLUSTER_ATTR(waitwarn_us, 0);
178 CLUSTER_ATTR(new_rsb_count, 0);
179 CLUSTER_ATTR(recover_callbacks, 0);
181 static struct configfs_attribute *cluster_attrs[] = {
182 [CLUSTER_ATTR_TCP_PORT] = &cluster_attr_tcp_port,
183 [CLUSTER_ATTR_BUFFER_SIZE] = &cluster_attr_buffer_size,
184 [CLUSTER_ATTR_RSBTBL_SIZE] = &cluster_attr_rsbtbl_size,
185 [CLUSTER_ATTR_RECOVER_TIMER] = &cluster_attr_recover_timer,
186 [CLUSTER_ATTR_TOSS_SECS] = &cluster_attr_toss_secs,
187 [CLUSTER_ATTR_SCAN_SECS] = &cluster_attr_scan_secs,
188 [CLUSTER_ATTR_LOG_DEBUG] = &cluster_attr_log_debug,
189 [CLUSTER_ATTR_LOG_INFO] = &cluster_attr_log_info,
190 [CLUSTER_ATTR_PROTOCOL] = &cluster_attr_protocol,
191 [CLUSTER_ATTR_TIMEWARN_CS] = &cluster_attr_timewarn_cs,
192 [CLUSTER_ATTR_WAITWARN_US] = &cluster_attr_waitwarn_us,
193 [CLUSTER_ATTR_NEW_RSB_COUNT] = &cluster_attr_new_rsb_count,
194 [CLUSTER_ATTR_RECOVER_CALLBACKS] = &cluster_attr_recover_callbacks,
195 [CLUSTER_ATTR_CLUSTER_NAME] = &cluster_attr_cluster_name,
200 COMM_ATTR_NODEID = 0,
207 NODE_ATTR_NODEID = 0,
211 struct dlm_clusters {
212 struct configfs_subsystem subsys;
216 struct config_group ss_group;
220 struct config_group group;
221 struct list_head members;
222 struct mutex members_lock;
224 struct dlm_nodes *nds;
228 struct config_group cs_group;
232 struct config_item item;
237 struct sockaddr_storage *addr[DLM_MAX_ADDR_COUNT];
241 struct config_group ns_group;
245 struct config_item item;
246 struct list_head list; /* space->members */
250 int comm_seq; /* copy of cm->seq when nd->nodeid is set */
253 static struct configfs_group_operations clusters_ops = {
254 .make_group = make_cluster,
255 .drop_item = drop_cluster,
258 static struct configfs_item_operations cluster_ops = {
259 .release = release_cluster,
262 static struct configfs_group_operations spaces_ops = {
263 .make_group = make_space,
264 .drop_item = drop_space,
267 static struct configfs_item_operations space_ops = {
268 .release = release_space,
271 static struct configfs_group_operations comms_ops = {
272 .make_item = make_comm,
273 .drop_item = drop_comm,
276 static struct configfs_item_operations comm_ops = {
277 .release = release_comm,
280 static struct configfs_group_operations nodes_ops = {
281 .make_item = make_node,
282 .drop_item = drop_node,
285 static struct configfs_item_operations node_ops = {
286 .release = release_node,
289 static struct config_item_type clusters_type = {
290 .ct_group_ops = &clusters_ops,
291 .ct_owner = THIS_MODULE,
294 static struct config_item_type cluster_type = {
295 .ct_item_ops = &cluster_ops,
296 .ct_attrs = cluster_attrs,
297 .ct_owner = THIS_MODULE,
300 static struct config_item_type spaces_type = {
301 .ct_group_ops = &spaces_ops,
302 .ct_owner = THIS_MODULE,
305 static struct config_item_type space_type = {
306 .ct_item_ops = &space_ops,
307 .ct_owner = THIS_MODULE,
310 static struct config_item_type comms_type = {
311 .ct_group_ops = &comms_ops,
312 .ct_owner = THIS_MODULE,
315 static struct config_item_type comm_type = {
316 .ct_item_ops = &comm_ops,
317 .ct_attrs = comm_attrs,
318 .ct_owner = THIS_MODULE,
321 static struct config_item_type nodes_type = {
322 .ct_group_ops = &nodes_ops,
323 .ct_owner = THIS_MODULE,
326 static struct config_item_type node_type = {
327 .ct_item_ops = &node_ops,
328 .ct_attrs = node_attrs,
329 .ct_owner = THIS_MODULE,
332 static struct dlm_space *config_item_to_space(struct config_item *i)
334 return i ? container_of(to_config_group(i), struct dlm_space, group) :
338 static struct dlm_comm *config_item_to_comm(struct config_item *i)
340 return i ? container_of(i, struct dlm_comm, item) : NULL;
343 static struct dlm_node *config_item_to_node(struct config_item *i)
345 return i ? container_of(i, struct dlm_node, item) : NULL;
348 static struct config_group *make_cluster(struct config_group *g,
351 struct dlm_cluster *cl = NULL;
352 struct dlm_spaces *sps = NULL;
353 struct dlm_comms *cms = NULL;
355 cl = kzalloc(sizeof(struct dlm_cluster), GFP_NOFS);
356 sps = kzalloc(sizeof(struct dlm_spaces), GFP_NOFS);
357 cms = kzalloc(sizeof(struct dlm_comms), GFP_NOFS);
359 if (!cl || !sps || !cms)
365 config_group_init_type_name(&cl->group, name, &cluster_type);
366 config_group_init_type_name(&sps->ss_group, "spaces", &spaces_type);
367 config_group_init_type_name(&cms->cs_group, "comms", &comms_type);
369 configfs_add_default_group(&sps->ss_group, &cl->group);
370 configfs_add_default_group(&cms->cs_group, &cl->group);
372 cl->cl_tcp_port = dlm_config.ci_tcp_port;
373 cl->cl_buffer_size = dlm_config.ci_buffer_size;
374 cl->cl_rsbtbl_size = dlm_config.ci_rsbtbl_size;
375 cl->cl_recover_timer = dlm_config.ci_recover_timer;
376 cl->cl_toss_secs = dlm_config.ci_toss_secs;
377 cl->cl_scan_secs = dlm_config.ci_scan_secs;
378 cl->cl_log_debug = dlm_config.ci_log_debug;
379 cl->cl_log_info = dlm_config.ci_log_info;
380 cl->cl_protocol = dlm_config.ci_protocol;
381 cl->cl_timewarn_cs = dlm_config.ci_timewarn_cs;
382 cl->cl_waitwarn_us = dlm_config.ci_waitwarn_us;
383 cl->cl_new_rsb_count = dlm_config.ci_new_rsb_count;
384 cl->cl_recover_callbacks = dlm_config.ci_recover_callbacks;
385 memcpy(cl->cl_cluster_name, dlm_config.ci_cluster_name,
388 space_list = &sps->ss_group;
389 comm_list = &cms->cs_group;
396 return ERR_PTR(-ENOMEM);
399 static void drop_cluster(struct config_group *g, struct config_item *i)
401 struct dlm_cluster *cl = config_item_to_cluster(i);
403 configfs_remove_default_groups(&cl->group);
411 static void release_cluster(struct config_item *i)
413 struct dlm_cluster *cl = config_item_to_cluster(i);
420 static struct config_group *make_space(struct config_group *g, const char *name)
422 struct dlm_space *sp = NULL;
423 struct dlm_nodes *nds = NULL;
425 sp = kzalloc(sizeof(struct dlm_space), GFP_NOFS);
426 nds = kzalloc(sizeof(struct dlm_nodes), GFP_NOFS);
431 config_group_init_type_name(&sp->group, name, &space_type);
433 config_group_init_type_name(&nds->ns_group, "nodes", &nodes_type);
434 configfs_add_default_group(&nds->ns_group, &sp->group);
436 INIT_LIST_HEAD(&sp->members);
437 mutex_init(&sp->members_lock);
438 sp->members_count = 0;
445 return ERR_PTR(-ENOMEM);
448 static void drop_space(struct config_group *g, struct config_item *i)
450 struct dlm_space *sp = config_item_to_space(i);
452 /* assert list_empty(&sp->members) */
454 configfs_remove_default_groups(&sp->group);
458 static void release_space(struct config_item *i)
460 struct dlm_space *sp = config_item_to_space(i);
465 static struct config_item *make_comm(struct config_group *g, const char *name)
469 cm = kzalloc(sizeof(struct dlm_comm), GFP_NOFS);
471 return ERR_PTR(-ENOMEM);
473 config_item_init_type_name(&cm->item, name, &comm_type);
475 cm->seq = dlm_comm_count++;
477 cm->seq = dlm_comm_count++;
485 static void drop_comm(struct config_group *g, struct config_item *i)
487 struct dlm_comm *cm = config_item_to_comm(i);
488 if (local_comm == cm)
490 dlm_lowcomms_close(cm->nodeid);
491 while (cm->addr_count--)
492 kfree(cm->addr[cm->addr_count]);
496 static void release_comm(struct config_item *i)
498 struct dlm_comm *cm = config_item_to_comm(i);
502 static struct config_item *make_node(struct config_group *g, const char *name)
504 struct dlm_space *sp = config_item_to_space(g->cg_item.ci_parent);
507 nd = kzalloc(sizeof(struct dlm_node), GFP_NOFS);
509 return ERR_PTR(-ENOMEM);
511 config_item_init_type_name(&nd->item, name, &node_type);
513 nd->weight = 1; /* default weight of 1 if none is set */
514 nd->new = 1; /* set to 0 once it's been read by dlm_nodeid_list() */
516 mutex_lock(&sp->members_lock);
517 list_add(&nd->list, &sp->members);
519 mutex_unlock(&sp->members_lock);
524 static void drop_node(struct config_group *g, struct config_item *i)
526 struct dlm_space *sp = config_item_to_space(g->cg_item.ci_parent);
527 struct dlm_node *nd = config_item_to_node(i);
529 mutex_lock(&sp->members_lock);
532 mutex_unlock(&sp->members_lock);
537 static void release_node(struct config_item *i)
539 struct dlm_node *nd = config_item_to_node(i);
543 static struct dlm_clusters clusters_root = {
548 .ci_type = &clusters_type,
554 int __init dlm_config_init(void)
556 config_group_init(&clusters_root.subsys.su_group);
557 mutex_init(&clusters_root.subsys.su_mutex);
558 return configfs_register_subsystem(&clusters_root.subsys);
561 void dlm_config_exit(void)
563 configfs_unregister_subsystem(&clusters_root.subsys);
567 * Functions for user space to read/write attributes
570 static ssize_t comm_nodeid_show(struct config_item *item, char *buf)
572 return sprintf(buf, "%d\n", config_item_to_comm(item)->nodeid);
575 static ssize_t comm_nodeid_store(struct config_item *item, const char *buf,
578 int rc = kstrtoint(buf, 0, &config_item_to_comm(item)->nodeid);
585 static ssize_t comm_local_show(struct config_item *item, char *buf)
587 return sprintf(buf, "%d\n", config_item_to_comm(item)->local);
590 static ssize_t comm_local_store(struct config_item *item, const char *buf,
593 struct dlm_comm *cm = config_item_to_comm(item);
594 int rc = kstrtoint(buf, 0, &cm->local);
598 if (cm->local && !local_comm)
603 static ssize_t comm_addr_store(struct config_item *item, const char *buf,
606 struct dlm_comm *cm = config_item_to_comm(item);
607 struct sockaddr_storage *addr;
610 if (len != sizeof(struct sockaddr_storage))
613 if (cm->addr_count >= DLM_MAX_ADDR_COUNT)
616 addr = kzalloc(sizeof(*addr), GFP_NOFS);
620 memcpy(addr, buf, len);
622 rv = dlm_lowcomms_addr(cm->nodeid, addr, len);
628 cm->addr[cm->addr_count++] = addr;
632 static ssize_t comm_addr_list_show(struct config_item *item, char *buf)
634 struct dlm_comm *cm = config_item_to_comm(item);
638 struct sockaddr_storage *addr;
639 struct sockaddr_in *addr_in;
640 struct sockaddr_in6 *addr_in6;
642 /* Taken from ip6_addr_string() defined in lib/vsprintf.c */
643 char buf0[sizeof("AF_INET6 xxxx:xxxx:xxxx:xxxx:xxxx:xxxx:255.255.255.255\n")];
646 /* Derived from SIMPLE_ATTR_SIZE of fs/configfs/file.c */
650 for (i = 0; i < cm->addr_count; i++) {
653 switch(addr->ss_family) {
655 addr_in = (struct sockaddr_in *)addr;
656 s = sprintf(buf0, "AF_INET %pI4\n", &addr_in->sin_addr.s_addr);
659 addr_in6 = (struct sockaddr_in6 *)addr;
660 s = sprintf(buf0, "AF_INET6 %pI6\n", &addr_in6->sin6_addr);
663 s = sprintf(buf0, "%s\n", "<UNKNOWN>");
674 return 4096 - allowance;
677 CONFIGFS_ATTR(comm_, nodeid);
678 CONFIGFS_ATTR(comm_, local);
679 CONFIGFS_ATTR_WO(comm_, addr);
680 CONFIGFS_ATTR_RO(comm_, addr_list);
682 static struct configfs_attribute *comm_attrs[] = {
683 [COMM_ATTR_NODEID] = &comm_attr_nodeid,
684 [COMM_ATTR_LOCAL] = &comm_attr_local,
685 [COMM_ATTR_ADDR] = &comm_attr_addr,
686 [COMM_ATTR_ADDR_LIST] = &comm_attr_addr_list,
690 static ssize_t node_nodeid_show(struct config_item *item, char *buf)
692 return sprintf(buf, "%d\n", config_item_to_node(item)->nodeid);
695 static ssize_t node_nodeid_store(struct config_item *item, const char *buf,
698 struct dlm_node *nd = config_item_to_node(item);
700 int rc = kstrtoint(buf, 0, &nd->nodeid);
704 dlm_comm_seq(nd->nodeid, &seq);
709 static ssize_t node_weight_show(struct config_item *item, char *buf)
711 return sprintf(buf, "%d\n", config_item_to_node(item)->weight);
714 static ssize_t node_weight_store(struct config_item *item, const char *buf,
717 int rc = kstrtoint(buf, 0, &config_item_to_node(item)->weight);
724 CONFIGFS_ATTR(node_, nodeid);
725 CONFIGFS_ATTR(node_, weight);
727 static struct configfs_attribute *node_attrs[] = {
728 [NODE_ATTR_NODEID] = &node_attr_nodeid,
729 [NODE_ATTR_WEIGHT] = &node_attr_weight,
734 * Functions for the dlm to get the info that's been configured
737 static struct dlm_space *get_space(char *name)
739 struct config_item *i;
744 mutex_lock(&space_list->cg_subsys->su_mutex);
745 i = config_group_find_item(space_list, name);
746 mutex_unlock(&space_list->cg_subsys->su_mutex);
748 return config_item_to_space(i);
751 static void put_space(struct dlm_space *sp)
753 config_item_put(&sp->group.cg_item);
756 static struct dlm_comm *get_comm(int nodeid)
758 struct config_item *i;
759 struct dlm_comm *cm = NULL;
765 mutex_lock(&clusters_root.subsys.su_mutex);
767 list_for_each_entry(i, &comm_list->cg_children, ci_entry) {
768 cm = config_item_to_comm(i);
770 if (cm->nodeid != nodeid)
776 mutex_unlock(&clusters_root.subsys.su_mutex);
783 static void put_comm(struct dlm_comm *cm)
785 config_item_put(&cm->item);
788 /* caller must free mem */
789 int dlm_config_nodes(char *lsname, struct dlm_config_node **nodes_out,
792 struct dlm_space *sp;
794 struct dlm_config_node *nodes, *node;
797 sp = get_space(lsname);
801 mutex_lock(&sp->members_lock);
802 if (!sp->members_count) {
804 printk(KERN_ERR "dlm: zero members_count\n");
808 count = sp->members_count;
810 nodes = kcalloc(count, sizeof(struct dlm_config_node), GFP_NOFS);
817 list_for_each_entry(nd, &sp->members, list) {
818 node->nodeid = nd->nodeid;
819 node->weight = nd->weight;
821 node->comm_seq = nd->comm_seq;
831 mutex_unlock(&sp->members_lock);
836 int dlm_comm_seq(int nodeid, uint32_t *seq)
838 struct dlm_comm *cm = get_comm(nodeid);
846 int dlm_our_nodeid(void)
848 return local_comm ? local_comm->nodeid : 0;
851 /* num 0 is first addr, num 1 is second addr */
852 int dlm_our_addr(struct sockaddr_storage *addr, int num)
856 if (num + 1 > local_comm->addr_count)
858 memcpy(addr, local_comm->addr[num], sizeof(*addr));
862 /* Config file defaults */
863 #define DEFAULT_TCP_PORT 21064
864 #define DEFAULT_BUFFER_SIZE 4096
865 #define DEFAULT_RSBTBL_SIZE 1024
866 #define DEFAULT_RECOVER_TIMER 5
867 #define DEFAULT_TOSS_SECS 10
868 #define DEFAULT_SCAN_SECS 5
869 #define DEFAULT_LOG_DEBUG 0
870 #define DEFAULT_LOG_INFO 1
871 #define DEFAULT_PROTOCOL 0
872 #define DEFAULT_TIMEWARN_CS 500 /* 5 sec = 500 centiseconds */
873 #define DEFAULT_WAITWARN_US 0
874 #define DEFAULT_NEW_RSB_COUNT 128
875 #define DEFAULT_RECOVER_CALLBACKS 0
876 #define DEFAULT_CLUSTER_NAME ""
878 struct dlm_config_info dlm_config = {
879 .ci_tcp_port = DEFAULT_TCP_PORT,
880 .ci_buffer_size = DEFAULT_BUFFER_SIZE,
881 .ci_rsbtbl_size = DEFAULT_RSBTBL_SIZE,
882 .ci_recover_timer = DEFAULT_RECOVER_TIMER,
883 .ci_toss_secs = DEFAULT_TOSS_SECS,
884 .ci_scan_secs = DEFAULT_SCAN_SECS,
885 .ci_log_debug = DEFAULT_LOG_DEBUG,
886 .ci_log_info = DEFAULT_LOG_INFO,
887 .ci_protocol = DEFAULT_PROTOCOL,
888 .ci_timewarn_cs = DEFAULT_TIMEWARN_CS,
889 .ci_waitwarn_us = DEFAULT_WAITWARN_US,
890 .ci_new_rsb_count = DEFAULT_NEW_RSB_COUNT,
891 .ci_recover_callbacks = DEFAULT_RECOVER_CALLBACKS,
892 .ci_cluster_name = DEFAULT_CLUSTER_NAME