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4173581876
According to SUSv3: [EACCES] Permission denied. An attempt was made to access a file in a way forbidden by its file access permissions. [EPERM] Operation not permitted. An attempt was made to perform an operation limited to processes with appropriate privileges or to the owner of a file or other resource. So -EPERM should be returned if capability checks fails. Strictly speaking this is an API change since the error code user sees is altered. Signed-off-by: Zhao Hongjiang <zhaohongjiang@huawei.com> Acked-by: Jan Kara <jack@suse.cz> Acked-by: Steven Whitehouse <swhiteho@redhat.com> Acked-by: Ian Kent <raven@themaw.net> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
1026 lines
26 KiB
C
1026 lines
26 KiB
C
/******************************************************************************
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*******************************************************************************
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**
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** Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
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** Copyright (C) 2004-2011 Red Hat, Inc. All rights reserved.
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**
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** This copyrighted material is made available to anyone wishing to use,
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** modify, copy, or redistribute it subject to the terms and conditions
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** of the GNU General Public License v.2.
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**
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*******************************************************************************
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******************************************************************************/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/configfs.h>
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#include <linux/slab.h>
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#include <linux/in.h>
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#include <linux/in6.h>
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#include <linux/dlmconstants.h>
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#include <net/ipv6.h>
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#include <net/sock.h>
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#include "config.h"
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#include "lowcomms.h"
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/*
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* /config/dlm/<cluster>/spaces/<space>/nodes/<node>/nodeid
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* /config/dlm/<cluster>/spaces/<space>/nodes/<node>/weight
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* /config/dlm/<cluster>/comms/<comm>/nodeid
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* /config/dlm/<cluster>/comms/<comm>/local
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* /config/dlm/<cluster>/comms/<comm>/addr (write only)
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* /config/dlm/<cluster>/comms/<comm>/addr_list (read only)
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* The <cluster> level is useless, but I haven't figured out how to avoid it.
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*/
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static struct config_group *space_list;
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static struct config_group *comm_list;
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static struct dlm_comm *local_comm;
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static uint32_t dlm_comm_count;
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struct dlm_clusters;
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struct dlm_cluster;
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struct dlm_spaces;
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struct dlm_space;
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struct dlm_comms;
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struct dlm_comm;
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struct dlm_nodes;
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struct dlm_node;
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static struct config_group *make_cluster(struct config_group *, const char *);
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static void drop_cluster(struct config_group *, struct config_item *);
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static void release_cluster(struct config_item *);
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static struct config_group *make_space(struct config_group *, const char *);
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static void drop_space(struct config_group *, struct config_item *);
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static void release_space(struct config_item *);
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static struct config_item *make_comm(struct config_group *, const char *);
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static void drop_comm(struct config_group *, struct config_item *);
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static void release_comm(struct config_item *);
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static struct config_item *make_node(struct config_group *, const char *);
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static void drop_node(struct config_group *, struct config_item *);
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static void release_node(struct config_item *);
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static ssize_t show_cluster(struct config_item *i, struct configfs_attribute *a,
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char *buf);
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static ssize_t store_cluster(struct config_item *i,
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struct configfs_attribute *a,
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const char *buf, size_t len);
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static ssize_t show_comm(struct config_item *i, struct configfs_attribute *a,
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char *buf);
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static ssize_t store_comm(struct config_item *i, struct configfs_attribute *a,
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const char *buf, size_t len);
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static ssize_t show_node(struct config_item *i, struct configfs_attribute *a,
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char *buf);
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static ssize_t store_node(struct config_item *i, struct configfs_attribute *a,
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const char *buf, size_t len);
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static ssize_t comm_nodeid_read(struct dlm_comm *cm, char *buf);
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static ssize_t comm_nodeid_write(struct dlm_comm *cm, const char *buf,
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size_t len);
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static ssize_t comm_local_read(struct dlm_comm *cm, char *buf);
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static ssize_t comm_local_write(struct dlm_comm *cm, const char *buf,
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size_t len);
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static ssize_t comm_addr_write(struct dlm_comm *cm, const char *buf,
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size_t len);
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static ssize_t comm_addr_list_read(struct dlm_comm *cm, char *buf);
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static ssize_t node_nodeid_read(struct dlm_node *nd, char *buf);
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static ssize_t node_nodeid_write(struct dlm_node *nd, const char *buf,
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size_t len);
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static ssize_t node_weight_read(struct dlm_node *nd, char *buf);
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static ssize_t node_weight_write(struct dlm_node *nd, const char *buf,
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size_t len);
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struct dlm_cluster {
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struct config_group group;
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unsigned int cl_tcp_port;
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unsigned int cl_buffer_size;
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unsigned int cl_rsbtbl_size;
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unsigned int cl_recover_timer;
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unsigned int cl_toss_secs;
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unsigned int cl_scan_secs;
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unsigned int cl_log_debug;
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unsigned int cl_protocol;
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unsigned int cl_timewarn_cs;
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unsigned int cl_waitwarn_us;
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unsigned int cl_new_rsb_count;
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unsigned int cl_recover_callbacks;
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char cl_cluster_name[DLM_LOCKSPACE_LEN];
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};
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enum {
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CLUSTER_ATTR_TCP_PORT = 0,
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CLUSTER_ATTR_BUFFER_SIZE,
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CLUSTER_ATTR_RSBTBL_SIZE,
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CLUSTER_ATTR_RECOVER_TIMER,
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CLUSTER_ATTR_TOSS_SECS,
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CLUSTER_ATTR_SCAN_SECS,
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CLUSTER_ATTR_LOG_DEBUG,
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CLUSTER_ATTR_PROTOCOL,
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CLUSTER_ATTR_TIMEWARN_CS,
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CLUSTER_ATTR_WAITWARN_US,
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CLUSTER_ATTR_NEW_RSB_COUNT,
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CLUSTER_ATTR_RECOVER_CALLBACKS,
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CLUSTER_ATTR_CLUSTER_NAME,
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};
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struct cluster_attribute {
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struct configfs_attribute attr;
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ssize_t (*show)(struct dlm_cluster *, char *);
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ssize_t (*store)(struct dlm_cluster *, const char *, size_t);
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};
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static ssize_t cluster_cluster_name_read(struct dlm_cluster *cl, char *buf)
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{
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return sprintf(buf, "%s\n", cl->cl_cluster_name);
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}
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static ssize_t cluster_cluster_name_write(struct dlm_cluster *cl,
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const char *buf, size_t len)
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{
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strncpy(dlm_config.ci_cluster_name, buf, DLM_LOCKSPACE_LEN);
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strncpy(cl->cl_cluster_name, buf, DLM_LOCKSPACE_LEN);
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return len;
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}
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static struct cluster_attribute cluster_attr_cluster_name = {
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.attr = { .ca_owner = THIS_MODULE,
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.ca_name = "cluster_name",
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.ca_mode = S_IRUGO | S_IWUSR },
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.show = cluster_cluster_name_read,
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.store = cluster_cluster_name_write,
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};
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static ssize_t cluster_set(struct dlm_cluster *cl, unsigned int *cl_field,
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int *info_field, int check_zero,
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const char *buf, size_t len)
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{
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unsigned int x;
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if (!capable(CAP_SYS_ADMIN))
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return -EPERM;
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x = simple_strtoul(buf, NULL, 0);
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if (check_zero && !x)
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return -EINVAL;
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*cl_field = x;
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*info_field = x;
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return len;
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}
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#define CLUSTER_ATTR(name, check_zero) \
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static ssize_t name##_write(struct dlm_cluster *cl, const char *buf, size_t len) \
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{ \
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return cluster_set(cl, &cl->cl_##name, &dlm_config.ci_##name, \
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check_zero, buf, len); \
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} \
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static ssize_t name##_read(struct dlm_cluster *cl, char *buf) \
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{ \
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return snprintf(buf, PAGE_SIZE, "%u\n", cl->cl_##name); \
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} \
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static struct cluster_attribute cluster_attr_##name = \
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__CONFIGFS_ATTR(name, 0644, name##_read, name##_write)
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CLUSTER_ATTR(tcp_port, 1);
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CLUSTER_ATTR(buffer_size, 1);
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CLUSTER_ATTR(rsbtbl_size, 1);
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CLUSTER_ATTR(recover_timer, 1);
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CLUSTER_ATTR(toss_secs, 1);
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CLUSTER_ATTR(scan_secs, 1);
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CLUSTER_ATTR(log_debug, 0);
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CLUSTER_ATTR(protocol, 0);
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CLUSTER_ATTR(timewarn_cs, 1);
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CLUSTER_ATTR(waitwarn_us, 0);
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CLUSTER_ATTR(new_rsb_count, 0);
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CLUSTER_ATTR(recover_callbacks, 0);
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static struct configfs_attribute *cluster_attrs[] = {
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[CLUSTER_ATTR_TCP_PORT] = &cluster_attr_tcp_port.attr,
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[CLUSTER_ATTR_BUFFER_SIZE] = &cluster_attr_buffer_size.attr,
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[CLUSTER_ATTR_RSBTBL_SIZE] = &cluster_attr_rsbtbl_size.attr,
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[CLUSTER_ATTR_RECOVER_TIMER] = &cluster_attr_recover_timer.attr,
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[CLUSTER_ATTR_TOSS_SECS] = &cluster_attr_toss_secs.attr,
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[CLUSTER_ATTR_SCAN_SECS] = &cluster_attr_scan_secs.attr,
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[CLUSTER_ATTR_LOG_DEBUG] = &cluster_attr_log_debug.attr,
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[CLUSTER_ATTR_PROTOCOL] = &cluster_attr_protocol.attr,
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[CLUSTER_ATTR_TIMEWARN_CS] = &cluster_attr_timewarn_cs.attr,
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[CLUSTER_ATTR_WAITWARN_US] = &cluster_attr_waitwarn_us.attr,
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[CLUSTER_ATTR_NEW_RSB_COUNT] = &cluster_attr_new_rsb_count.attr,
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[CLUSTER_ATTR_RECOVER_CALLBACKS] = &cluster_attr_recover_callbacks.attr,
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[CLUSTER_ATTR_CLUSTER_NAME] = &cluster_attr_cluster_name.attr,
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NULL,
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};
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enum {
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COMM_ATTR_NODEID = 0,
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COMM_ATTR_LOCAL,
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COMM_ATTR_ADDR,
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COMM_ATTR_ADDR_LIST,
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};
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struct comm_attribute {
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struct configfs_attribute attr;
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ssize_t (*show)(struct dlm_comm *, char *);
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ssize_t (*store)(struct dlm_comm *, const char *, size_t);
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};
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static struct comm_attribute comm_attr_nodeid = {
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.attr = { .ca_owner = THIS_MODULE,
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.ca_name = "nodeid",
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.ca_mode = S_IRUGO | S_IWUSR },
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.show = comm_nodeid_read,
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.store = comm_nodeid_write,
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};
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static struct comm_attribute comm_attr_local = {
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.attr = { .ca_owner = THIS_MODULE,
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.ca_name = "local",
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.ca_mode = S_IRUGO | S_IWUSR },
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.show = comm_local_read,
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.store = comm_local_write,
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};
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static struct comm_attribute comm_attr_addr = {
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.attr = { .ca_owner = THIS_MODULE,
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.ca_name = "addr",
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.ca_mode = S_IWUSR },
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.store = comm_addr_write,
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};
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static struct comm_attribute comm_attr_addr_list = {
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.attr = { .ca_owner = THIS_MODULE,
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.ca_name = "addr_list",
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.ca_mode = S_IRUGO },
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.show = comm_addr_list_read,
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};
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static struct configfs_attribute *comm_attrs[] = {
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[COMM_ATTR_NODEID] = &comm_attr_nodeid.attr,
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[COMM_ATTR_LOCAL] = &comm_attr_local.attr,
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[COMM_ATTR_ADDR] = &comm_attr_addr.attr,
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[COMM_ATTR_ADDR_LIST] = &comm_attr_addr_list.attr,
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NULL,
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};
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enum {
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NODE_ATTR_NODEID = 0,
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NODE_ATTR_WEIGHT,
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};
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struct node_attribute {
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struct configfs_attribute attr;
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ssize_t (*show)(struct dlm_node *, char *);
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ssize_t (*store)(struct dlm_node *, const char *, size_t);
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};
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static struct node_attribute node_attr_nodeid = {
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.attr = { .ca_owner = THIS_MODULE,
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.ca_name = "nodeid",
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.ca_mode = S_IRUGO | S_IWUSR },
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.show = node_nodeid_read,
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.store = node_nodeid_write,
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};
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static struct node_attribute node_attr_weight = {
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.attr = { .ca_owner = THIS_MODULE,
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.ca_name = "weight",
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.ca_mode = S_IRUGO | S_IWUSR },
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.show = node_weight_read,
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.store = node_weight_write,
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};
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static struct configfs_attribute *node_attrs[] = {
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[NODE_ATTR_NODEID] = &node_attr_nodeid.attr,
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[NODE_ATTR_WEIGHT] = &node_attr_weight.attr,
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NULL,
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};
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struct dlm_clusters {
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struct configfs_subsystem subsys;
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};
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struct dlm_spaces {
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struct config_group ss_group;
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};
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struct dlm_space {
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struct config_group group;
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struct list_head members;
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struct mutex members_lock;
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int members_count;
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};
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struct dlm_comms {
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struct config_group cs_group;
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};
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struct dlm_comm {
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struct config_item item;
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int seq;
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int nodeid;
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int local;
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int addr_count;
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struct sockaddr_storage *addr[DLM_MAX_ADDR_COUNT];
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};
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struct dlm_nodes {
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struct config_group ns_group;
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};
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struct dlm_node {
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struct config_item item;
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struct list_head list; /* space->members */
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int nodeid;
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int weight;
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int new;
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int comm_seq; /* copy of cm->seq when nd->nodeid is set */
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};
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static struct configfs_group_operations clusters_ops = {
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.make_group = make_cluster,
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.drop_item = drop_cluster,
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};
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static struct configfs_item_operations cluster_ops = {
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.release = release_cluster,
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.show_attribute = show_cluster,
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.store_attribute = store_cluster,
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};
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static struct configfs_group_operations spaces_ops = {
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.make_group = make_space,
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.drop_item = drop_space,
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};
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static struct configfs_item_operations space_ops = {
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.release = release_space,
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};
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static struct configfs_group_operations comms_ops = {
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.make_item = make_comm,
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.drop_item = drop_comm,
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};
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static struct configfs_item_operations comm_ops = {
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.release = release_comm,
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.show_attribute = show_comm,
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.store_attribute = store_comm,
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};
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static struct configfs_group_operations nodes_ops = {
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.make_item = make_node,
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.drop_item = drop_node,
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};
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static struct configfs_item_operations node_ops = {
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.release = release_node,
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.show_attribute = show_node,
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.store_attribute = store_node,
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};
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static struct config_item_type clusters_type = {
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.ct_group_ops = &clusters_ops,
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.ct_owner = THIS_MODULE,
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};
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static struct config_item_type cluster_type = {
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.ct_item_ops = &cluster_ops,
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.ct_attrs = cluster_attrs,
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.ct_owner = THIS_MODULE,
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};
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static struct config_item_type spaces_type = {
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.ct_group_ops = &spaces_ops,
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.ct_owner = THIS_MODULE,
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};
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static struct config_item_type space_type = {
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.ct_item_ops = &space_ops,
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.ct_owner = THIS_MODULE,
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};
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static struct config_item_type comms_type = {
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.ct_group_ops = &comms_ops,
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.ct_owner = THIS_MODULE,
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};
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static struct config_item_type comm_type = {
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.ct_item_ops = &comm_ops,
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.ct_attrs = comm_attrs,
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.ct_owner = THIS_MODULE,
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};
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|
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static struct config_item_type nodes_type = {
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.ct_group_ops = &nodes_ops,
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.ct_owner = THIS_MODULE,
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};
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static struct config_item_type node_type = {
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.ct_item_ops = &node_ops,
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.ct_attrs = node_attrs,
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.ct_owner = THIS_MODULE,
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};
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|
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static struct dlm_cluster *config_item_to_cluster(struct config_item *i)
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{
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return i ? container_of(to_config_group(i), struct dlm_cluster, group) :
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NULL;
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}
|
|
|
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static struct dlm_space *config_item_to_space(struct config_item *i)
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{
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return i ? container_of(to_config_group(i), struct dlm_space, group) :
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NULL;
|
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}
|
|
|
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static struct dlm_comm *config_item_to_comm(struct config_item *i)
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{
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return i ? container_of(i, struct dlm_comm, item) : NULL;
|
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}
|
|
|
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static struct dlm_node *config_item_to_node(struct config_item *i)
|
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{
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return i ? container_of(i, struct dlm_node, item) : NULL;
|
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}
|
|
|
|
static struct config_group *make_cluster(struct config_group *g,
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const char *name)
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{
|
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struct dlm_cluster *cl = NULL;
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struct dlm_spaces *sps = NULL;
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struct dlm_comms *cms = NULL;
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void *gps = NULL;
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|
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cl = kzalloc(sizeof(struct dlm_cluster), GFP_NOFS);
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gps = kcalloc(3, sizeof(struct config_group *), GFP_NOFS);
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sps = kzalloc(sizeof(struct dlm_spaces), GFP_NOFS);
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cms = kzalloc(sizeof(struct dlm_comms), GFP_NOFS);
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|
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if (!cl || !gps || !sps || !cms)
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goto fail;
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|
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config_group_init_type_name(&cl->group, name, &cluster_type);
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config_group_init_type_name(&sps->ss_group, "spaces", &spaces_type);
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config_group_init_type_name(&cms->cs_group, "comms", &comms_type);
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|
|
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)
|
|
{
|
|
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;
|
|
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;
|
|
nd->nodeid = simple_strtol(buf, NULL, 0);
|
|
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)
|
|
{
|
|
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 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
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#define DEFAULT_TOSS_SECS 10
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#define DEFAULT_SCAN_SECS 5
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#define DEFAULT_LOG_DEBUG 0
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#define DEFAULT_PROTOCOL 0
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#define DEFAULT_TIMEWARN_CS 500 /* 5 sec = 500 centiseconds */
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#define DEFAULT_WAITWARN_US 0
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#define DEFAULT_NEW_RSB_COUNT 128
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#define DEFAULT_RECOVER_CALLBACKS 0
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#define DEFAULT_CLUSTER_NAME ""
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struct dlm_config_info dlm_config = {
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.ci_tcp_port = DEFAULT_TCP_PORT,
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.ci_buffer_size = DEFAULT_BUFFER_SIZE,
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.ci_rsbtbl_size = DEFAULT_RSBTBL_SIZE,
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.ci_recover_timer = DEFAULT_RECOVER_TIMER,
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.ci_toss_secs = DEFAULT_TOSS_SECS,
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.ci_scan_secs = DEFAULT_SCAN_SECS,
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.ci_log_debug = DEFAULT_LOG_DEBUG,
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.ci_protocol = DEFAULT_PROTOCOL,
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.ci_timewarn_cs = DEFAULT_TIMEWARN_CS,
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.ci_waitwarn_us = DEFAULT_WAITWARN_US,
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.ci_new_rsb_count = DEFAULT_NEW_RSB_COUNT,
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.ci_recover_callbacks = DEFAULT_RECOVER_CALLBACKS,
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.ci_cluster_name = DEFAULT_CLUSTER_NAME
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};
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