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[DLM] expose dlm_config_info fields in configfs 

Make the dlm_config_info values readable and writeable via configfs
entries.

Signed-off-by: David Teigland <teigland@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
This commit is contained in:
David Teigland 2007-01-09 09:46:02 -06:00 committed by Steven Whitehouse
parent 99fc64874a
commit d200778e12
1 changed files with 132 additions and 4 deletions
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136
fs/dlm/config.c
View File

@ -54,6 +54,11 @@ static struct config_item *make_node(struct config_group *, const char *);
static void drop_node(struct config_group *, struct config_item *); static void drop_node(struct config_group *, struct config_item *);
static void release_node(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, static ssize_t show_comm(struct config_item *i, struct configfs_attribute *a,
char *buf); char *buf);
static ssize_t store_comm(struct config_item *i, struct configfs_attribute *a, static ssize_t store_comm(struct config_item *i, struct configfs_attribute *a,
@ -73,6 +78,101 @@ static ssize_t node_nodeid_write(struct node *nd, const char *buf, size_t len);
static ssize_t node_weight_read(struct node *nd, char *buf); static ssize_t node_weight_read(struct node *nd, char *buf);
static ssize_t node_weight_write(struct node *nd, const char *buf, size_t len); static ssize_t node_weight_write(struct node *nd, const char *buf, size_t len);
struct 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;
};
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,
};
struct cluster_attribute {
struct configfs_attribute attr;
ssize_t (*show)(struct cluster *, char *);
ssize_t (*store)(struct cluster *, const char *, size_t);
};
static ssize_t cluster_set(struct cluster *cl, unsigned int *cl_field,
unsigned 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 __CONFIGFS_ATTR(_name,_mode,_read,_write) { \
.attr = { .ca_name = __stringify(_name), \
.ca_mode = _mode, \
.ca_owner = THIS_MODULE }, \
.show = _read, \
.store = _write, \
}
#define CLUSTER_ATTR(name, check_zero) \
static ssize_t name##_write(struct 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 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);
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,
NULL,
};
enum { enum {
COMM_ATTR_NODEID = 0, COMM_ATTR_NODEID = 0,
COMM_ATTR_LOCAL, COMM_ATTR_LOCAL,
@ -152,10 +252,6 @@ struct clusters {
struct configfs_subsystem subsys; struct configfs_subsystem subsys;
}; };
struct cluster {
struct config_group group;
};
struct spaces { struct spaces {
struct config_group ss_group; struct config_group ss_group;
}; };
@ -197,6 +293,8 @@ static struct configfs_group_operations clusters_ops = {
static struct configfs_item_operations cluster_ops = { static struct configfs_item_operations cluster_ops = {
.release = release_cluster, .release = release_cluster,
.show_attribute = show_cluster,
.store_attribute = store_cluster,
}; };
static struct configfs_group_operations spaces_ops = { static struct configfs_group_operations spaces_ops = {
@ -237,6 +335,7 @@ static struct config_item_type clusters_type = {
static struct config_item_type cluster_type = { static struct config_item_type cluster_type = {
.ct_item_ops = &cluster_ops, .ct_item_ops = &cluster_ops,
.ct_attrs = cluster_attrs,
.ct_owner = THIS_MODULE, .ct_owner = THIS_MODULE,
}; };
@ -317,6 +416,16 @@ static struct config_group *make_cluster(struct config_group *g,
cl->group.default_groups[1] = &cms->cs_group; cl->group.default_groups[1] = &cms->cs_group;
cl->group.default_groups[2] = NULL; 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;
space_list = &sps->ss_group; space_list = &sps->ss_group;
comm_list = &cms->cs_group; comm_list = &cms->cs_group;
return &cl->group; return &cl->group;
@ -509,6 +618,25 @@ void dlm_config_exit(void)
* Functions for user space to read/write attributes * Functions for user space to read/write attributes
*/ */
static ssize_t show_cluster(struct config_item *i, struct configfs_attribute *a,
char *buf)
{
struct cluster *cl = 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 cluster *cl = 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, static ssize_t show_comm(struct config_item *i, struct configfs_attribute *a,
char *buf) char *buf)
{ {