Commit d022509d authored by David Teigland's avatar David Teigland

dlm: add new debugfs entry

The new debugfs entry dumps all rsb and lkb structures, and includes
a lot more information than has been available before.  This includes
the new timestamps added by a previous patch for debugging callback
issues.
Signed-off-by: default avatarDavid Teigland <teigland@redhat.com>
parent e3a84ad4
/******************************************************************************
*******************************************************************************
**
** Copyright (C) 2005 Red Hat, Inc. All rights reserved.
** Copyright (C) 2005-2008 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
......@@ -27,7 +27,7 @@ static struct dentry *dlm_root;
struct rsb_iter {
int entry;
int locks;
int format;
int header;
struct dlm_ls *ls;
struct list_head *next;
......@@ -60,8 +60,8 @@ static char *print_lockmode(int mode)
}
}
static void print_resource_lock(struct seq_file *s, struct dlm_lkb *lkb,
struct dlm_rsb *res)
static void print_format1_lock(struct seq_file *s, struct dlm_lkb *lkb,
struct dlm_rsb *res)
{
seq_printf(s, "%08x %s", lkb->lkb_id, print_lockmode(lkb->lkb_grmode));
......@@ -83,7 +83,7 @@ static void print_resource_lock(struct seq_file *s, struct dlm_lkb *lkb,
seq_printf(s, "\n");
}
static int print_resource(struct dlm_rsb *res, struct seq_file *s)
static int print_format1(struct dlm_rsb *res, struct seq_file *s)
{
struct dlm_lkb *lkb;
int i, lvblen = res->res_ls->ls_lvblen, recover_list, root_list;
......@@ -134,15 +134,15 @@ static int print_resource(struct dlm_rsb *res, struct seq_file *s)
/* Print the locks attached to this resource */
seq_printf(s, "Granted Queue\n");
list_for_each_entry(lkb, &res->res_grantqueue, lkb_statequeue)
print_resource_lock(s, lkb, res);
print_format1_lock(s, lkb, res);
seq_printf(s, "Conversion Queue\n");
list_for_each_entry(lkb, &res->res_convertqueue, lkb_statequeue)
print_resource_lock(s, lkb, res);
print_format1_lock(s, lkb, res);
seq_printf(s, "Waiting Queue\n");
list_for_each_entry(lkb, &res->res_waitqueue, lkb_statequeue)
print_resource_lock(s, lkb, res);
print_format1_lock(s, lkb, res);
if (list_empty(&res->res_lookup))
goto out;
......@@ -160,7 +160,8 @@ static int print_resource(struct dlm_rsb *res, struct seq_file *s)
return 0;
}
static void print_lock(struct seq_file *s, struct dlm_lkb *lkb, struct dlm_rsb *r)
static void print_format2_lock(struct seq_file *s, struct dlm_lkb *lkb,
struct dlm_rsb *r)
{
u64 xid = 0;
u64 us;
......@@ -193,20 +194,108 @@ static void print_lock(struct seq_file *s, struct dlm_lkb *lkb, struct dlm_rsb *
r->res_name);
}
static int print_locks(struct dlm_rsb *r, struct seq_file *s)
static int print_format2(struct dlm_rsb *r, struct seq_file *s)
{
struct dlm_lkb *lkb;
lock_rsb(r);
list_for_each_entry(lkb, &r->res_grantqueue, lkb_statequeue)
print_lock(s, lkb, r);
print_format2_lock(s, lkb, r);
list_for_each_entry(lkb, &r->res_convertqueue, lkb_statequeue)
print_lock(s, lkb, r);
print_format2_lock(s, lkb, r);
list_for_each_entry(lkb, &r->res_waitqueue, lkb_statequeue)
print_lock(s, lkb, r);
print_format2_lock(s, lkb, r);
unlock_rsb(r);
return 0;
}
static void print_format3_lock(struct seq_file *s, struct dlm_lkb *lkb,
int rsb_lookup)
{
u64 xid = 0;
if (lkb->lkb_flags & DLM_IFL_USER) {
if (lkb->lkb_ua)
xid = lkb->lkb_ua->xid;
}
seq_printf(s, "lkb %x %d %x %u %llu %x %x %d %d %d %d %d %d %u %llu %llu\n",
lkb->lkb_id,
lkb->lkb_nodeid,
lkb->lkb_remid,
lkb->lkb_ownpid,
(unsigned long long)xid,
lkb->lkb_exflags,
lkb->lkb_flags,
lkb->lkb_status,
lkb->lkb_grmode,
lkb->lkb_rqmode,
lkb->lkb_highbast,
rsb_lookup,
lkb->lkb_wait_type,
lkb->lkb_lvbseq,
(unsigned long long)ktime_to_ns(lkb->lkb_timestamp),
(unsigned long long)ktime_to_ns(lkb->lkb_time_bast));
}
static int print_format3(struct dlm_rsb *r, struct seq_file *s)
{
struct dlm_lkb *lkb;
int i, lvblen = r->res_ls->ls_lvblen;
int print_name = 1;
lock_rsb(r);
seq_printf(s, "rsb %p %d %x %lx %d %d %u %d ",
r,
r->res_nodeid,
r->res_first_lkid,
r->res_flags,
!list_empty(&r->res_root_list),
!list_empty(&r->res_recover_list),
r->res_recover_locks_count,
r->res_length);
for (i = 0; i < r->res_length; i++) {
if (!isascii(r->res_name[i]) || !isprint(r->res_name[i]))
print_name = 0;
}
seq_printf(s, "%s", print_name ? "str " : "hex");
for (i = 0; i < r->res_length; i++) {
if (print_name)
seq_printf(s, "%c", r->res_name[i]);
else
seq_printf(s, " %02x", (unsigned char)r->res_name[i]);
}
seq_printf(s, "\n");
if (!r->res_lvbptr)
goto do_locks;
seq_printf(s, "lvb %u %d", r->res_lvbseq, lvblen);
for (i = 0; i < lvblen; i++)
seq_printf(s, " %02x", (unsigned char)r->res_lvbptr[i]);
seq_printf(s, "\n");
do_locks:
list_for_each_entry(lkb, &r->res_grantqueue, lkb_statequeue)
print_format3_lock(s, lkb, 0);
list_for_each_entry(lkb, &r->res_convertqueue, lkb_statequeue)
print_format3_lock(s, lkb, 0);
list_for_each_entry(lkb, &r->res_waitqueue, lkb_statequeue)
print_format3_lock(s, lkb, 0);
list_for_each_entry(lkb, &r->res_lookup, lkb_rsb_lookup)
print_format3_lock(s, lkb, 1);
unlock_rsb(r);
return 0;
......@@ -231,7 +320,7 @@ static int rsb_iter_next(struct rsb_iter *ri)
break;
}
read_unlock(&ls->ls_rsbtbl[i].lock);
}
}
ri->entry = i;
if (ri->entry >= ls->ls_rsbtbl_size)
......@@ -248,7 +337,7 @@ static int rsb_iter_next(struct rsb_iter *ri)
read_unlock(&ls->ls_rsbtbl[i].lock);
dlm_put_rsb(old);
goto top;
}
}
ri->rsb = list_entry(ri->next, struct dlm_rsb, res_hashchain);
dlm_hold_rsb(ri->rsb);
read_unlock(&ls->ls_rsbtbl[i].lock);
......@@ -274,6 +363,7 @@ static struct rsb_iter *rsb_iter_init(struct dlm_ls *ls)
ri->ls = ls;
ri->entry = 0;
ri->next = NULL;
ri->format = 1;
if (rsb_iter_next(ri)) {
rsb_iter_free(ri);
......@@ -325,16 +415,26 @@ static int rsb_seq_show(struct seq_file *file, void *iter_ptr)
{
struct rsb_iter *ri = iter_ptr;
if (ri->locks) {
switch (ri->format) {
case 1:
print_format1(ri->rsb, file);
break;
case 2:
if (ri->header) {
seq_printf(file, "id nodeid remid pid xid exflags flags "
"sts grmode rqmode time_ms r_nodeid "
"r_len r_name\n");
seq_printf(file, "id nodeid remid pid xid exflags "
"flags sts grmode rqmode time_ms "
"r_nodeid r_len r_name\n");
ri->header = 0;
}
print_locks(ri->rsb, file);
} else {
print_resource(ri->rsb, file);
print_format2(ri->rsb, file);
break;
case 3:
if (ri->header) {
seq_printf(file, "version rsb 1.1 lvb 1.1 lkb 1.1\n");
ri->header = 0;
}
print_format3(ri->rsb, file);
break;
}
return 0;
......@@ -385,7 +485,7 @@ static struct rsb_iter *locks_iter_init(struct dlm_ls *ls, loff_t *pos)
ri->ls = ls;
ri->entry = 0;
ri->next = NULL;
ri->locks = 1;
ri->format = 2;
if (*pos == 0)
ri->header = 1;
......@@ -447,6 +547,84 @@ static const struct file_operations locks_fops = {
.release = seq_release
};
/*
* Dump all rsb/lvb/lkb state in compact listing, more complete than _locks
* This can replace both formats 1 and 2 eventually.
*/
static struct rsb_iter *all_iter_init(struct dlm_ls *ls, loff_t *pos)
{
struct rsb_iter *ri;
ri = kzalloc(sizeof *ri, GFP_KERNEL);
if (!ri)
return NULL;
ri->ls = ls;
ri->entry = 0;
ri->next = NULL;
ri->format = 3;
if (*pos == 0)
ri->header = 1;
if (rsb_iter_next(ri)) {
rsb_iter_free(ri);
return NULL;
}
return ri;
}
static void *all_seq_start(struct seq_file *file, loff_t *pos)
{
struct rsb_iter *ri;
loff_t n = *pos;
ri = all_iter_init(file->private, pos);
if (!ri)
return NULL;
while (n--) {
if (rsb_iter_next(ri)) {
rsb_iter_free(ri);
return NULL;
}
}
return ri;
}
static struct seq_operations all_seq_ops = {
.start = all_seq_start,
.next = rsb_seq_next,
.stop = rsb_seq_stop,
.show = rsb_seq_show,
};
static int all_open(struct inode *inode, struct file *file)
{
struct seq_file *seq;
int ret;
ret = seq_open(file, &all_seq_ops);
if (ret)
return ret;
seq = file->private_data;
seq->private = inode->i_private;
return 0;
}
static const struct file_operations all_fops = {
.owner = THIS_MODULE,
.open = all_open,
.read = seq_read,
.llseek = seq_lseek,
.release = seq_release
};
/*
* dump lkb's on the ls_waiters list
*/
......@@ -489,30 +667,33 @@ static const struct file_operations waiters_fops = {
.read = waiters_read
};
void dlm_delete_debug_file(struct dlm_ls *ls)
{
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);
if (ls->ls_debug_locks_dentry)
debugfs_remove(ls->ls_debug_locks_dentry);
if (ls->ls_debug_all_dentry)
debugfs_remove(ls->ls_debug_all_dentry);
}
int dlm_create_debug_file(struct dlm_ls *ls)
{
char name[DLM_LOCKSPACE_LEN+8];
/* format 1 */
ls->ls_debug_rsb_dentry = debugfs_create_file(ls->ls_name,
S_IFREG | S_IRUGO,
dlm_root,
ls,
&rsb_fops);
if (!ls->ls_debug_rsb_dentry)
return -ENOMEM;
goto fail;
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;
}
/* format 2 */
memset(name, 0, sizeof(name));
snprintf(name, DLM_LOCKSPACE_LEN+8, "%s_locks", ls->ls_name);
......@@ -522,23 +703,38 @@ int dlm_create_debug_file(struct dlm_ls *ls)
dlm_root,
ls,
&locks_fops);
if (!ls->ls_debug_locks_dentry) {
debugfs_remove(ls->ls_debug_waiters_dentry);
debugfs_remove(ls->ls_debug_rsb_dentry);
return -ENOMEM;
}
if (!ls->ls_debug_locks_dentry)
goto fail;
/* format 3 */
memset(name, 0, sizeof(name));
snprintf(name, DLM_LOCKSPACE_LEN+8, "%s_all", ls->ls_name);
ls->ls_debug_all_dentry = debugfs_create_file(name,
S_IFREG | S_IRUGO,
dlm_root,
ls,
&all_fops);
if (!ls->ls_debug_all_dentry)
goto fail;
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)
goto fail;
return 0;
}
void dlm_delete_debug_file(struct dlm_ls *ls)
{
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);
if (ls->ls_debug_locks_dentry)
debugfs_remove(ls->ls_debug_locks_dentry);
fail:
dlm_delete_debug_file(ls);
return -ENOMEM;
}
int __init dlm_register_debugfs(void)
......
......@@ -482,6 +482,7 @@ struct dlm_ls {
struct dentry *ls_debug_rsb_dentry; /* debugfs */
struct dentry *ls_debug_waiters_dentry; /* debugfs */
struct dentry *ls_debug_locks_dentry; /* debugfs */
struct dentry *ls_debug_all_dentry; /* debugfs */
wait_queue_head_t ls_uevent_wait; /* user part of join/leave */
int ls_uevent_result;
......
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