[DLM] more info through debugfs
Display more information from debugfs, particularly locks waiting for a master lookup or operations waiting for a remote reply. Signed-off-by: David Teigland <teigland@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
This commit is contained in:
David Teigland
Steven Whitehouse
parent
a9e5f4d078
commit
5de6319b18
3 changed files with 114 additions and 24 deletions
|
|
@ -18,6 +18,9 @@
|
|||
|
||||
#include "dlm_internal.h"
|
||||
|
||||
#define DLM_DEBUG_BUF_LEN 4096
|
||||
static char debug_buf[DLM_DEBUG_BUF_LEN];
|
||||
static struct mutex debug_buf_lock;
|
||||
|
||||
static struct dentry *dlm_root;
|
||||
|
||||
|
|
@ -28,6 +31,10 @@ struct rsb_iter {
|
|||
struct dlm_rsb *rsb;
|
||||
};
|
||||
|
||||
/*
|
||||
* dump all rsb's in the lockspace hash table
|
||||
*/
|
||||
|
||||
static char *print_lockmode(int mode)
|
||||
{
|
||||
switch (mode) {
|
||||
|
|
@ -76,7 +83,7 @@ static void print_lock(struct seq_file *s, struct dlm_lkb *lkb,
|
|||
static int print_resource(struct dlm_rsb *res, struct seq_file *s)
|
||||
{
|
||||
struct dlm_lkb *lkb;
|
||||
int i, lvblen = res->res_ls->ls_lvblen;
|
||||
int i, lvblen = res->res_ls->ls_lvblen, recover_list, root_list;
|
||||
|
||||
seq_printf(s, "\nResource %p Name (len=%d) \"", res, res->res_length);
|
||||
for (i = 0; i < res->res_length; i++) {
|
||||
|
|
@ -110,6 +117,15 @@ static int print_resource(struct dlm_rsb *res, struct seq_file *s)
|
|||
seq_printf(s, "\n");
|
||||
}
|
||||
|
||||
root_list = !list_empty(&res->res_root_list);
|
||||
recover_list = !list_empty(&res->res_recover_list);
|
||||
|
||||
if (root_list || recover_list) {
|
||||
seq_printf(s, "Recovery: root %d recover %d flags %lx "
|
||||
"count %d\n", root_list, recover_list,
|
||||
res->flags, res->res_recover_locks_count);
|
||||
}
|
||||
|
||||
/* Print the locks attached to this resource */
|
||||
seq_printf(s, "Granted Queue\n");
|
||||
list_for_each_entry(lkb, &res->res_grantqueue, lkb_statequeue)
|
||||
|
|
@ -123,6 +139,18 @@ static int print_resource(struct dlm_rsb *res, struct seq_file *s)
|
|||
list_for_each_entry(lkb, &res->res_waitqueue, lkb_statequeue)
|
||||
print_lock(s, lkb, res);
|
||||
|
||||
if (list_empty(&res->res_lookup))
|
||||
goto out;
|
||||
|
||||
seq_printf(s, "Lookup Queue\n");
|
||||
list_for_each_entry(lkb, &res->res_lookup, lkb_rsb_lookup) {
|
||||
seq_printf(s, "%08x %s", lkb->lkb_id,
|
||||
print_lockmode(lkb->lkb_rqmode));
|
||||
if (lkb->lkb_wait_type)
|
||||
seq_printf(s, " wait_type: %d", lkb->lkb_wait_type);
|
||||
seq_printf(s, "\n");
|
||||
}
|
||||
out:
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
|
@ -190,7 +218,7 @@ static struct rsb_iter *rsb_iter_init(struct dlm_ls *ls)
|
|||
return ri;
|
||||
}
|
||||
|
||||
static void *seq_start(struct seq_file *file, loff_t *pos)
|
||||
static void *rsb_seq_start(struct seq_file *file, loff_t *pos)
|
||||
{
|
||||
struct rsb_iter *ri;
|
||||
loff_t n = *pos;
|
||||
|
|
@ -209,7 +237,7 @@ static void *seq_start(struct seq_file *file, loff_t *pos)
|
|||
return ri;
|
||||
}
|
||||
|
||||
static void *seq_next(struct seq_file *file, void *iter_ptr, loff_t *pos)
|
||||
static void *rsb_seq_next(struct seq_file *file, void *iter_ptr, loff_t *pos)
|
||||
{
|
||||
struct rsb_iter *ri = iter_ptr;
|
||||
|
||||
|
|
@ -223,12 +251,12 @@ static void *seq_next(struct seq_file *file, void *iter_ptr, loff_t *pos)
|
|||
return ri;
|
||||
}
|
||||
|
||||
static void seq_stop(struct seq_file *file, void *iter_ptr)
|
||||
static void rsb_seq_stop(struct seq_file *file, void *iter_ptr)
|
||||
{
|
||||
/* nothing for now */
|
||||
}
|
||||
|
||||
static int seq_show(struct seq_file *file, void *iter_ptr)
|
||||
static int rsb_seq_show(struct seq_file *file, void *iter_ptr)
|
||||
{
|
||||
struct rsb_iter *ri = iter_ptr;
|
||||
|
||||
|
|
@ -237,19 +265,19 @@ static int seq_show(struct seq_file *file, void *iter_ptr)
|
|||
return 0;
|
||||
}
|
||||
|
||||
static struct seq_operations dlm_seq_ops = {
|
||||
.start = seq_start,
|
||||
.next = seq_next,
|
||||
.stop = seq_stop,
|
||||
.show = seq_show,
|
||||
static struct seq_operations rsb_seq_ops = {
|
||||
.start = rsb_seq_start,
|
||||
.next = rsb_seq_next,
|
||||
.stop = rsb_seq_stop,
|
||||
.show = rsb_seq_show,
|
||||
};
|
||||
|
||||
static int do_open(struct inode *inode, struct file *file)
|
||||
static int rsb_open(struct inode *inode, struct file *file)
|
||||
{
|
||||
struct seq_file *seq;
|
||||
int ret;
|
||||
|
||||
ret = seq_open(file, &dlm_seq_ops);
|
||||
ret = rsb_seq_open(file, &rsb_seq_ops);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
|
|
@ -259,32 +287,92 @@ static int do_open(struct inode *inode, struct file *file)
|
|||
return 0;
|
||||
}
|
||||
|
||||
static struct file_operations dlm_fops = {
|
||||
static struct file_operations rsb_fops = {
|
||||
.owner = THIS_MODULE,
|
||||
.open = do_open,
|
||||
.open = rsb_open,
|
||||
.read = seq_read,
|
||||
.llseek = seq_lseek,
|
||||
.release = seq_release
|
||||
};
|
||||
|
||||
/*
|
||||
* dump lkb's on the ls_waiters list
|
||||
*/
|
||||
|
||||
static int waiters_open(struct inode *inode, struct file *file)
|
||||
{
|
||||
file->private_data = inode->i_private;
|
||||
return 0;
|
||||
}
|
||||
|
||||
static ssize_t waiters_read(struct file *file, char __user *userbuf,
|
||||
size_t count, loff_t *ppos)
|
||||
{
|
||||
struct dlm_ls *ls = file->private_data;
|
||||
struct dlm_lkb *lkb;
|
||||
size_t len = DLM_DEBUG_BUF_LEN, pos = 0, rv;
|
||||
|
||||
mutex_lock(&debug_buf_lock);
|
||||
mutex_lock(&ls->ls_waiters_mutex);
|
||||
memset(debug_buf, 0, sizeof(debug_buf));
|
||||
|
||||
list_for_each_entry(lkb, &ls->ls_waiters, lkb_wait_reply) {
|
||||
pos += snprintf(debug_buf + pos, len - pos, "%x %d %d %s\n",
|
||||
lkb->lkb_id, lkb->lkb_wait_type,
|
||||
lkb->lkb_nodeid, lkb->lkb_resource->res_name);
|
||||
}
|
||||
mutex_unlock(&ls->ls_waiters_mutex);
|
||||
|
||||
rv = simple_read_from_buffer(userbuf, count, ppos, debug_buf, pos);
|
||||
mutex_unlock(&debug_buf_lock);
|
||||
return rv;
|
||||
}
|
||||
|
||||
static struct file_operations waiters_fops = {
|
||||
.owner = THIS_MODULE,
|
||||
.open = waiters_open,
|
||||
.read = waiters_read
|
||||
};
|
||||
|
||||
int dlm_create_debug_file(struct dlm_ls *ls)
|
||||
{
|
||||
ls->ls_debug_dentry = debugfs_create_file(ls->ls_name,
|
||||
char name[DLM_LOCKSPACE_LEN+8];
|
||||
|
||||
ls->ls_debug_rsb_dentry = debugfs_create_file(ls->ls_name,
|
||||
S_IFREG | S_IRUGO,
|
||||
dlm_root,
|
||||
ls,
|
||||
&dlm_fops);
|
||||
return ls->ls_debug_dentry ? 0 : -ENOMEM;
|
||||
&rsb_fops);
|
||||
if (!ls->ls_rsb_debug_dentry)
|
||||
return -ENOMEM;
|
||||
|
||||
memset(name, 0, sizeof(name));
|
||||
snprintf(name, DLM_LOCKSPACE_LEN+8, "%s_waiters", ls->ls_name);
|
||||
|
||||
ls->ls_debug_waiters_dentry = debugfs_create_file(name,
|
||||
S_IFREG | S_IRUGO,
|
||||
dlm_root,
|
||||
ls,
|
||||
&waiters_fops);
|
||||
if (!ls->ls_debug_waiters_dentry) {
|
||||
debugfs_remove(ls->ls_debug_rsb_dentry);
|
||||
return -ENOMEM;
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
void dlm_delete_debug_file(struct dlm_ls *ls)
|
||||
{
|
||||
if (ls->ls_debug_dentry)
|
||||
debugfs_remove(ls->ls_debug_dentry);
|
||||
if (ls->ls_debug_rsb_dentry)
|
||||
debugfs_remove(ls->ls_debug_rsb_dentry);
|
||||
if (ls->ls_debug_waiters_dentry)
|
||||
debugfs_remove(ls->ls_debug_waiters_dentry);
|
||||
}
|
||||
|
||||
int dlm_register_debugfs(void)
|
||||
{
|
||||
mutex_init(&debug_buf_lock);
|
||||
dlm_root = debugfs_create_dir("dlm", NULL);
|
||||
return dlm_root ? 0 : -ENOMEM;
|
||||
}
|
||||
|
|
|
|||
|
|
@ -446,7 +446,8 @@ struct dlm_ls {
|
|||
struct dlm_lkb ls_stub_lkb; /* for returning errors */
|
||||
struct dlm_message ls_stub_ms; /* for faking a reply */
|
||||
|
||||
struct dentry *ls_debug_dentry; /* debugfs */
|
||||
struct dentry *ls_debug_rsb_dentry; /* debugfs */
|
||||
struct dentry *ls_debug_waiters_dentry; /* debugfs */
|
||||
|
||||
wait_queue_head_t ls_uevent_wait; /* user part of join/leave */
|
||||
int ls_uevent_result;
|
||||
|
|
|
|||
|
|
@ -446,7 +446,8 @@ static int new_lockspace(char *name, int namelen, void **lockspace,
|
|||
memset(&ls->ls_stub_rsb, 0, sizeof(struct dlm_rsb));
|
||||
ls->ls_stub_rsb.res_ls = ls;
|
||||
|
||||
ls->ls_debug_dentry = NULL;
|
||||
ls->ls_debug_rsb_dentry = NULL;
|
||||
ls->ls_debug_waiters_dentry = NULL;
|
||||
|
||||
init_waitqueue_head(&ls->ls_uevent_wait);
|
||||
ls->ls_uevent_result = 0;
|
||||
|
|
|
|||
Loading…
Reference in a new issue