1 /* -*- mode: c; c-basic-offset: 8; -*-
2 * vim: noexpandtab sw=8 ts=8 sts=0:
6 * debug functionality for the dlm
8 * Copyright (C) 2004 Oracle. All rights reserved.
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public
12 * License as published by the Free Software Foundation; either
13 * version 2 of the License, or (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * General Public License for more details.
20 * You should have received a copy of the GNU General Public
21 * License along with this program; if not, write to the
22 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
23 * Boston, MA 021110-1307, USA.
27 #include <linux/types.h>
28 #include <linux/slab.h>
29 #include <linux/highmem.h>
30 #include <linux/utsname.h>
31 #include <linux/sysctl.h>
32 #include <linux/spinlock.h>
33 #include <linux/debugfs.h>
35 #include "cluster/heartbeat.h"
36 #include "cluster/nodemanager.h"
37 #include "cluster/tcp.h"
40 #include "dlmcommon.h"
41 #include "dlmdomain.h"
44 #define MLOG_MASK_PREFIX ML_DLM
45 #include "cluster/masklog.h"
47 void dlm_print_one_lock_resource(struct dlm_lock_resource
*res
)
49 mlog(ML_NOTICE
, "lockres: %.*s, owner=%u, state=%u\n",
50 res
->lockname
.len
, res
->lockname
.name
,
51 res
->owner
, res
->state
);
52 spin_lock(&res
->spinlock
);
53 __dlm_print_one_lock_resource(res
);
54 spin_unlock(&res
->spinlock
);
57 static void dlm_print_lockres_refmap(struct dlm_lock_resource
*res
)
60 assert_spin_locked(&res
->spinlock
);
62 mlog(ML_NOTICE
, " refmap nodes: [ ");
65 bit
= find_next_bit(res
->refmap
, O2NM_MAX_NODES
, bit
);
66 if (bit
>= O2NM_MAX_NODES
)
71 printk("], inflight=%u\n", res
->inflight_locks
);
74 void __dlm_print_one_lock_resource(struct dlm_lock_resource
*res
)
76 struct list_head
*iter2
;
77 struct dlm_lock
*lock
;
79 assert_spin_locked(&res
->spinlock
);
81 mlog(ML_NOTICE
, "lockres: %.*s, owner=%u, state=%u\n",
82 res
->lockname
.len
, res
->lockname
.name
,
83 res
->owner
, res
->state
);
84 mlog(ML_NOTICE
, " last used: %lu, on purge list: %s\n",
85 res
->last_used
, list_empty(&res
->purge
) ? "no" : "yes");
86 dlm_print_lockres_refmap(res
);
87 mlog(ML_NOTICE
, " granted queue: \n");
88 list_for_each(iter2
, &res
->granted
) {
89 lock
= list_entry(iter2
, struct dlm_lock
, list
);
90 spin_lock(&lock
->spinlock
);
91 mlog(ML_NOTICE
, " type=%d, conv=%d, node=%u, "
92 "cookie=%u:%llu, ast=(empty=%c,pend=%c), bast=(empty=%c,pend=%c)\n",
93 lock
->ml
.type
, lock
->ml
.convert_type
, lock
->ml
.node
,
94 dlm_get_lock_cookie_node(be64_to_cpu(lock
->ml
.cookie
)),
95 dlm_get_lock_cookie_seq(be64_to_cpu(lock
->ml
.cookie
)),
96 list_empty(&lock
->ast_list
) ? 'y' : 'n',
97 lock
->ast_pending
? 'y' : 'n',
98 list_empty(&lock
->bast_list
) ? 'y' : 'n',
99 lock
->bast_pending
? 'y' : 'n');
100 spin_unlock(&lock
->spinlock
);
102 mlog(ML_NOTICE
, " converting queue: \n");
103 list_for_each(iter2
, &res
->converting
) {
104 lock
= list_entry(iter2
, struct dlm_lock
, list
);
105 spin_lock(&lock
->spinlock
);
106 mlog(ML_NOTICE
, " type=%d, conv=%d, node=%u, "
107 "cookie=%u:%llu, ast=(empty=%c,pend=%c), bast=(empty=%c,pend=%c)\n",
108 lock
->ml
.type
, lock
->ml
.convert_type
, lock
->ml
.node
,
109 dlm_get_lock_cookie_node(be64_to_cpu(lock
->ml
.cookie
)),
110 dlm_get_lock_cookie_seq(be64_to_cpu(lock
->ml
.cookie
)),
111 list_empty(&lock
->ast_list
) ? 'y' : 'n',
112 lock
->ast_pending
? 'y' : 'n',
113 list_empty(&lock
->bast_list
) ? 'y' : 'n',
114 lock
->bast_pending
? 'y' : 'n');
115 spin_unlock(&lock
->spinlock
);
117 mlog(ML_NOTICE
, " blocked queue: \n");
118 list_for_each(iter2
, &res
->blocked
) {
119 lock
= list_entry(iter2
, struct dlm_lock
, list
);
120 spin_lock(&lock
->spinlock
);
121 mlog(ML_NOTICE
, " type=%d, conv=%d, node=%u, "
122 "cookie=%u:%llu, ast=(empty=%c,pend=%c), bast=(empty=%c,pend=%c)\n",
123 lock
->ml
.type
, lock
->ml
.convert_type
, lock
->ml
.node
,
124 dlm_get_lock_cookie_node(be64_to_cpu(lock
->ml
.cookie
)),
125 dlm_get_lock_cookie_seq(be64_to_cpu(lock
->ml
.cookie
)),
126 list_empty(&lock
->ast_list
) ? 'y' : 'n',
127 lock
->ast_pending
? 'y' : 'n',
128 list_empty(&lock
->bast_list
) ? 'y' : 'n',
129 lock
->bast_pending
? 'y' : 'n');
130 spin_unlock(&lock
->spinlock
);
134 void dlm_print_one_lock(struct dlm_lock
*lockid
)
136 dlm_print_one_lock_resource(lockid
->lockres
);
138 EXPORT_SYMBOL_GPL(dlm_print_one_lock
);
141 void dlm_dump_lock_resources(struct dlm_ctxt
*dlm
)
143 struct dlm_lock_resource
*res
;
144 struct hlist_node
*iter
;
145 struct hlist_head
*bucket
;
148 mlog(ML_NOTICE
, "struct dlm_ctxt: %s, node=%u, key=%u\n",
149 dlm
->name
, dlm
->node_num
, dlm
->key
);
150 if (!dlm
|| !dlm
->name
) {
151 mlog(ML_ERROR
, "dlm=%p\n", dlm
);
155 spin_lock(&dlm
->spinlock
);
156 for (i
=0; i
<DLM_HASH_BUCKETS
; i
++) {
157 bucket
= dlm_lockres_hash(dlm
, i
);
158 hlist_for_each_entry(res
, iter
, bucket
, hash_node
)
159 dlm_print_one_lock_resource(res
);
161 spin_unlock(&dlm
->spinlock
);
165 static const char *dlm_errnames
[] = {
166 [DLM_NORMAL
] = "DLM_NORMAL",
167 [DLM_GRANTED
] = "DLM_GRANTED",
168 [DLM_DENIED
] = "DLM_DENIED",
169 [DLM_DENIED_NOLOCKS
] = "DLM_DENIED_NOLOCKS",
170 [DLM_WORKING
] = "DLM_WORKING",
171 [DLM_BLOCKED
] = "DLM_BLOCKED",
172 [DLM_BLOCKED_ORPHAN
] = "DLM_BLOCKED_ORPHAN",
173 [DLM_DENIED_GRACE_PERIOD
] = "DLM_DENIED_GRACE_PERIOD",
174 [DLM_SYSERR
] = "DLM_SYSERR",
175 [DLM_NOSUPPORT
] = "DLM_NOSUPPORT",
176 [DLM_CANCELGRANT
] = "DLM_CANCELGRANT",
177 [DLM_IVLOCKID
] = "DLM_IVLOCKID",
178 [DLM_SYNC
] = "DLM_SYNC",
179 [DLM_BADTYPE
] = "DLM_BADTYPE",
180 [DLM_BADRESOURCE
] = "DLM_BADRESOURCE",
181 [DLM_MAXHANDLES
] = "DLM_MAXHANDLES",
182 [DLM_NOCLINFO
] = "DLM_NOCLINFO",
183 [DLM_NOLOCKMGR
] = "DLM_NOLOCKMGR",
184 [DLM_NOPURGED
] = "DLM_NOPURGED",
185 [DLM_BADARGS
] = "DLM_BADARGS",
186 [DLM_VOID
] = "DLM_VOID",
187 [DLM_NOTQUEUED
] = "DLM_NOTQUEUED",
188 [DLM_IVBUFLEN
] = "DLM_IVBUFLEN",
189 [DLM_CVTUNGRANT
] = "DLM_CVTUNGRANT",
190 [DLM_BADPARAM
] = "DLM_BADPARAM",
191 [DLM_VALNOTVALID
] = "DLM_VALNOTVALID",
192 [DLM_REJECTED
] = "DLM_REJECTED",
193 [DLM_ABORT
] = "DLM_ABORT",
194 [DLM_CANCEL
] = "DLM_CANCEL",
195 [DLM_IVRESHANDLE
] = "DLM_IVRESHANDLE",
196 [DLM_DEADLOCK
] = "DLM_DEADLOCK",
197 [DLM_DENIED_NOASTS
] = "DLM_DENIED_NOASTS",
198 [DLM_FORWARD
] = "DLM_FORWARD",
199 [DLM_TIMEOUT
] = "DLM_TIMEOUT",
200 [DLM_IVGROUPID
] = "DLM_IVGROUPID",
201 [DLM_VERS_CONFLICT
] = "DLM_VERS_CONFLICT",
202 [DLM_BAD_DEVICE_PATH
] = "DLM_BAD_DEVICE_PATH",
203 [DLM_NO_DEVICE_PERMISSION
] = "DLM_NO_DEVICE_PERMISSION",
204 [DLM_NO_CONTROL_DEVICE
] = "DLM_NO_CONTROL_DEVICE ",
205 [DLM_RECOVERING
] = "DLM_RECOVERING",
206 [DLM_MIGRATING
] = "DLM_MIGRATING",
207 [DLM_MAXSTATS
] = "DLM_MAXSTATS",
210 static const char *dlm_errmsgs
[] = {
211 [DLM_NORMAL
] = "request in progress",
212 [DLM_GRANTED
] = "request granted",
213 [DLM_DENIED
] = "request denied",
214 [DLM_DENIED_NOLOCKS
] = "request denied, out of system resources",
215 [DLM_WORKING
] = "async request in progress",
216 [DLM_BLOCKED
] = "lock request blocked",
217 [DLM_BLOCKED_ORPHAN
] = "lock request blocked by a orphan lock",
218 [DLM_DENIED_GRACE_PERIOD
] = "topological change in progress",
219 [DLM_SYSERR
] = "system error",
220 [DLM_NOSUPPORT
] = "unsupported",
221 [DLM_CANCELGRANT
] = "can't cancel convert: already granted",
222 [DLM_IVLOCKID
] = "bad lockid",
223 [DLM_SYNC
] = "synchronous request granted",
224 [DLM_BADTYPE
] = "bad resource type",
225 [DLM_BADRESOURCE
] = "bad resource handle",
226 [DLM_MAXHANDLES
] = "no more resource handles",
227 [DLM_NOCLINFO
] = "can't contact cluster manager",
228 [DLM_NOLOCKMGR
] = "can't contact lock manager",
229 [DLM_NOPURGED
] = "can't contact purge daemon",
230 [DLM_BADARGS
] = "bad api args",
231 [DLM_VOID
] = "no status",
232 [DLM_NOTQUEUED
] = "NOQUEUE was specified and request failed",
233 [DLM_IVBUFLEN
] = "invalid resource name length",
234 [DLM_CVTUNGRANT
] = "attempted to convert ungranted lock",
235 [DLM_BADPARAM
] = "invalid lock mode specified",
236 [DLM_VALNOTVALID
] = "value block has been invalidated",
237 [DLM_REJECTED
] = "request rejected, unrecognized client",
238 [DLM_ABORT
] = "blocked lock request cancelled",
239 [DLM_CANCEL
] = "conversion request cancelled",
240 [DLM_IVRESHANDLE
] = "invalid resource handle",
241 [DLM_DEADLOCK
] = "deadlock recovery refused this request",
242 [DLM_DENIED_NOASTS
] = "failed to allocate AST",
243 [DLM_FORWARD
] = "request must wait for primary's response",
244 [DLM_TIMEOUT
] = "timeout value for lock has expired",
245 [DLM_IVGROUPID
] = "invalid group specification",
246 [DLM_VERS_CONFLICT
] = "version conflicts prevent request handling",
247 [DLM_BAD_DEVICE_PATH
] = "Locks device does not exist or path wrong",
248 [DLM_NO_DEVICE_PERMISSION
] = "Client has insufficient perms for device",
249 [DLM_NO_CONTROL_DEVICE
] = "Cannot set options on opened device ",
250 [DLM_RECOVERING
] = "lock resource being recovered",
251 [DLM_MIGRATING
] = "lock resource being migrated",
252 [DLM_MAXSTATS
] = "invalid error number",
255 const char *dlm_errmsg(enum dlm_status err
)
257 if (err
>= DLM_MAXSTATS
|| err
< 0)
258 return dlm_errmsgs
[DLM_MAXSTATS
];
259 return dlm_errmsgs
[err
];
261 EXPORT_SYMBOL_GPL(dlm_errmsg
);
263 const char *dlm_errname(enum dlm_status err
)
265 if (err
>= DLM_MAXSTATS
|| err
< 0)
266 return dlm_errnames
[DLM_MAXSTATS
];
267 return dlm_errnames
[err
];
269 EXPORT_SYMBOL_GPL(dlm_errname
);
272 #ifdef CONFIG_DEBUG_FS
274 static struct dentry
*dlm_debugfs_root
= NULL
;
276 /* NOTE: This function converts a lockname into a string. It uses knowledge
277 * of the format of the lockname that should be outside the purview of the dlm.
278 * We are adding only to make dlm debugging slightly easier.
280 * For more on lockname formats, please refer to dlmglue.c and ocfs2_lockid.h.
282 static int stringify_lockname(const char *lockname
, int locklen
,
286 __be64 inode_blkno_be
;
288 #define OCFS2_DENTRY_LOCK_INO_START 18
289 if (*lockname
== 'N') {
290 memcpy((__be64
*)&inode_blkno_be
,
291 (char *)&lockname
[OCFS2_DENTRY_LOCK_INO_START
],
293 out
+= snprintf(buf
+ out
, len
- out
, "%.*s%08x",
294 OCFS2_DENTRY_LOCK_INO_START
- 1, lockname
,
295 (unsigned int)be64_to_cpu(inode_blkno_be
));
297 out
+= snprintf(buf
+ out
, len
- out
, "%.*s",
302 #define DLM_DEBUGFS_DIR "o2dlm"
303 #define DLM_DEBUGFS_DLM_STATE "dlm_state"
304 #define DLM_DEBUGFS_LOCKING_STATE "locking_state"
305 #define DLM_DEBUGFS_MLE_STATE "mle_state"
307 /* begin - utils funcs */
308 static void dlm_debug_free(struct kref
*kref
)
310 struct dlm_debug_ctxt
*dc
;
312 dc
= container_of(kref
, struct dlm_debug_ctxt
, debug_refcnt
);
317 void dlm_debug_put(struct dlm_debug_ctxt
*dc
)
320 kref_put(&dc
->debug_refcnt
, dlm_debug_free
);
323 static void dlm_debug_get(struct dlm_debug_ctxt
*dc
)
325 kref_get(&dc
->debug_refcnt
);
328 static int stringify_nodemap(unsigned long *nodemap
, int maxnodes
,
334 while ((i
= find_next_bit(nodemap
, maxnodes
, i
+ 1)) < maxnodes
)
335 out
+= snprintf(buf
+ out
, len
- out
, "%d ", i
);
340 static struct debug_buffer
*debug_buffer_allocate(void)
342 struct debug_buffer
*db
= NULL
;
344 db
= kzalloc(sizeof(struct debug_buffer
), GFP_KERNEL
);
349 db
->buf
= kmalloc(db
->len
, GFP_KERNEL
);
359 static ssize_t
debug_buffer_read(struct file
*file
, char __user
*buf
,
360 size_t nbytes
, loff_t
*ppos
)
362 struct debug_buffer
*db
= file
->private_data
;
364 return simple_read_from_buffer(buf
, nbytes
, ppos
, db
->buf
, db
->len
);
367 static loff_t
debug_buffer_llseek(struct file
*file
, loff_t off
, int whence
)
369 struct debug_buffer
*db
= file
->private_data
;
377 new = file
->f_pos
+ off
;
381 if (new < 0 || new > db
->len
)
384 return (file
->f_pos
= new);
387 static int debug_buffer_release(struct inode
*inode
, struct file
*file
)
389 struct debug_buffer
*db
= (struct debug_buffer
*)file
->private_data
;
397 /* end - util funcs */
399 /* begin - debug mle funcs */
400 static int dump_mle(struct dlm_master_list_entry
*mle
, char *buf
, int len
)
403 unsigned int namelen
;
407 if (mle
->type
!= DLM_MLE_MASTER
) {
408 namelen
= mle
->u
.name
.len
;
409 name
= mle
->u
.name
.name
;
411 namelen
= mle
->u
.res
->lockname
.len
;
412 name
= mle
->u
.res
->lockname
.name
;
415 if (mle
->type
== DLM_MLE_BLOCK
)
417 else if (mle
->type
== DLM_MLE_MASTER
)
422 out
+= stringify_lockname(name
, namelen
, buf
+ out
, len
- out
);
423 out
+= snprintf(buf
+ out
, len
- out
,
424 "\t%3s\tmas=%3u\tnew=%3u\tevt=%1d\tuse=%1d\tref=%3d\n",
425 mle_type
, mle
->master
, mle
->new_master
,
426 !list_empty(&mle
->hb_events
),
428 atomic_read(&mle
->mle_refs
.refcount
));
430 out
+= snprintf(buf
+ out
, len
- out
, "Maybe=");
431 out
+= stringify_nodemap(mle
->maybe_map
, O2NM_MAX_NODES
,
432 buf
+ out
, len
- out
);
433 out
+= snprintf(buf
+ out
, len
- out
, "\n");
435 out
+= snprintf(buf
+ out
, len
- out
, "Vote=");
436 out
+= stringify_nodemap(mle
->vote_map
, O2NM_MAX_NODES
,
437 buf
+ out
, len
- out
);
438 out
+= snprintf(buf
+ out
, len
- out
, "\n");
440 out
+= snprintf(buf
+ out
, len
- out
, "Response=");
441 out
+= stringify_nodemap(mle
->response_map
, O2NM_MAX_NODES
,
442 buf
+ out
, len
- out
);
443 out
+= snprintf(buf
+ out
, len
- out
, "\n");
445 out
+= snprintf(buf
+ out
, len
- out
, "Node=");
446 out
+= stringify_nodemap(mle
->node_map
, O2NM_MAX_NODES
,
447 buf
+ out
, len
- out
);
448 out
+= snprintf(buf
+ out
, len
- out
, "\n");
450 out
+= snprintf(buf
+ out
, len
- out
, "\n");
455 static int debug_mle_print(struct dlm_ctxt
*dlm
, struct debug_buffer
*db
)
457 struct dlm_master_list_entry
*mle
;
459 unsigned long total
= 0;
461 out
+= snprintf(db
->buf
+ out
, db
->len
- out
,
462 "Dumping MLEs for Domain: %s\n", dlm
->name
);
464 spin_lock(&dlm
->master_lock
);
465 list_for_each_entry(mle
, &dlm
->master_list
, list
) {
467 if (db
->len
- out
< 200)
469 out
+= dump_mle(mle
, db
->buf
+ out
, db
->len
- out
);
471 spin_unlock(&dlm
->master_lock
);
473 out
+= snprintf(db
->buf
+ out
, db
->len
- out
,
474 "Total on list: %ld\n", total
);
478 static int debug_mle_open(struct inode
*inode
, struct file
*file
)
480 struct dlm_ctxt
*dlm
= inode
->i_private
;
481 struct debug_buffer
*db
;
483 db
= debug_buffer_allocate();
487 db
->len
= debug_mle_print(dlm
, db
);
489 file
->private_data
= db
;
496 static struct file_operations debug_mle_fops
= {
497 .open
= debug_mle_open
,
498 .release
= debug_buffer_release
,
499 .read
= debug_buffer_read
,
500 .llseek
= debug_buffer_llseek
,
503 /* end - debug mle funcs */
505 /* begin - debug lockres funcs */
506 static int dump_lock(struct dlm_lock
*lock
, int list_type
, char *buf
, int len
)
510 #define DEBUG_LOCK_VERSION 1
511 spin_lock(&lock
->spinlock
);
512 out
= snprintf(buf
, len
, "LOCK:%d,%d,%d,%d,%d,%d:%lld,%d,%d,%d,%d,%d,"
515 list_type
, lock
->ml
.type
, lock
->ml
.convert_type
,
517 dlm_get_lock_cookie_node(be64_to_cpu(lock
->ml
.cookie
)),
518 dlm_get_lock_cookie_seq(be64_to_cpu(lock
->ml
.cookie
)),
519 !list_empty(&lock
->ast_list
),
520 !list_empty(&lock
->bast_list
),
521 lock
->ast_pending
, lock
->bast_pending
,
522 lock
->convert_pending
, lock
->lock_pending
,
523 lock
->cancel_pending
, lock
->unlock_pending
,
524 atomic_read(&lock
->lock_refs
.refcount
));
525 spin_unlock(&lock
->spinlock
);
530 static int dump_lockres(struct dlm_lock_resource
*res
, char *buf
, int len
)
532 struct dlm_lock
*lock
;
536 out
+= snprintf(buf
+ out
, len
- out
, "NAME:");
537 out
+= stringify_lockname(res
->lockname
.name
, res
->lockname
.len
,
538 buf
+ out
, len
- out
);
539 out
+= snprintf(buf
+ out
, len
- out
, "\n");
541 #define DEBUG_LRES_VERSION 1
542 out
+= snprintf(buf
+ out
, len
- out
,
543 "LRES:%d,%d,%d,%ld,%d,%d,%d,%d,%d,%d,%d\n",
545 res
->owner
, res
->state
, res
->last_used
,
546 !list_empty(&res
->purge
),
547 !list_empty(&res
->dirty
),
548 !list_empty(&res
->recovering
),
549 res
->inflight_locks
, res
->migration_pending
,
550 atomic_read(&res
->asts_reserved
),
551 atomic_read(&res
->refs
.refcount
));
554 out
+= snprintf(buf
+ out
, len
- out
, "RMAP:");
555 out
+= stringify_nodemap(res
->refmap
, O2NM_MAX_NODES
,
556 buf
+ out
, len
- out
);
557 out
+= snprintf(buf
+ out
, len
- out
, "\n");
560 out
+= snprintf(buf
+ out
, len
- out
, "LVBX:");
561 for (i
= 0; i
< DLM_LVB_LEN
; i
++)
562 out
+= snprintf(buf
+ out
, len
- out
,
563 "%02x", (unsigned char)res
->lvb
[i
]);
564 out
+= snprintf(buf
+ out
, len
- out
, "\n");
567 list_for_each_entry(lock
, &res
->granted
, list
)
568 out
+= dump_lock(lock
, 0, buf
+ out
, len
- out
);
571 list_for_each_entry(lock
, &res
->converting
, list
)
572 out
+= dump_lock(lock
, 1, buf
+ out
, len
- out
);
575 list_for_each_entry(lock
, &res
->blocked
, list
)
576 out
+= dump_lock(lock
, 2, buf
+ out
, len
- out
);
578 out
+= snprintf(buf
+ out
, len
- out
, "\n");
583 static void *lockres_seq_start(struct seq_file
*m
, loff_t
*pos
)
585 struct debug_lockres
*dl
= m
->private;
586 struct dlm_ctxt
*dlm
= dl
->dl_ctxt
;
587 struct dlm_lock_resource
*res
= NULL
;
589 spin_lock(&dlm
->spinlock
);
592 list_for_each_entry(res
, &dl
->dl_res
->tracking
, tracking
) {
594 dlm_lockres_put(dl
->dl_res
);
597 if (&res
->tracking
== &dlm
->tracking_list
) {
598 mlog(0, "End of list found, %p\n", res
);
602 dlm_lockres_get(res
);
607 if (!list_empty(&dlm
->tracking_list
)) {
608 list_for_each_entry(res
, &dlm
->tracking_list
, tracking
)
610 dlm_lockres_get(res
);
617 spin_lock(&dl
->dl_res
->spinlock
);
618 dump_lockres(dl
->dl_res
, dl
->dl_buf
, dl
->dl_len
- 1);
619 spin_unlock(&dl
->dl_res
->spinlock
);
622 spin_unlock(&dlm
->spinlock
);
627 static void lockres_seq_stop(struct seq_file
*m
, void *v
)
631 static void *lockres_seq_next(struct seq_file
*m
, void *v
, loff_t
*pos
)
636 static int lockres_seq_show(struct seq_file
*s
, void *v
)
638 struct debug_lockres
*dl
= (struct debug_lockres
*)v
;
640 seq_printf(s
, "%s", dl
->dl_buf
);
645 static struct seq_operations debug_lockres_ops
= {
646 .start
= lockres_seq_start
,
647 .stop
= lockres_seq_stop
,
648 .next
= lockres_seq_next
,
649 .show
= lockres_seq_show
,
652 static int debug_lockres_open(struct inode
*inode
, struct file
*file
)
654 struct dlm_ctxt
*dlm
= inode
->i_private
;
656 struct seq_file
*seq
;
657 struct debug_lockres
*dl
= NULL
;
659 dl
= kzalloc(sizeof(struct debug_lockres
), GFP_KERNEL
);
665 dl
->dl_len
= PAGE_SIZE
;
666 dl
->dl_buf
= kmalloc(dl
->dl_len
, GFP_KERNEL
);
672 ret
= seq_open(file
, &debug_lockres_ops
);
678 seq
= (struct seq_file
*) file
->private_data
;
692 static int debug_lockres_release(struct inode
*inode
, struct file
*file
)
694 struct seq_file
*seq
= (struct seq_file
*)file
->private_data
;
695 struct debug_lockres
*dl
= (struct debug_lockres
*)seq
->private;
698 dlm_lockres_put(dl
->dl_res
);
699 dlm_put(dl
->dl_ctxt
);
701 return seq_release_private(inode
, file
);
704 static struct file_operations debug_lockres_fops
= {
705 .open
= debug_lockres_open
,
706 .release
= debug_lockres_release
,
710 /* end - debug lockres funcs */
712 /* begin - debug state funcs */
713 static int debug_state_print(struct dlm_ctxt
*dlm
, struct debug_buffer
*db
)
716 struct dlm_reco_node_data
*node
;
718 int lres
, rres
, ures
, tres
;
720 lres
= atomic_read(&dlm
->local_resources
);
721 rres
= atomic_read(&dlm
->remote_resources
);
722 ures
= atomic_read(&dlm
->unknown_resources
);
723 tres
= lres
+ rres
+ ures
;
725 spin_lock(&dlm
->spinlock
);
727 switch (dlm
->dlm_state
) {
729 state
= "NEW"; break;
730 case DLM_CTXT_JOINED
:
731 state
= "JOINED"; break;
732 case DLM_CTXT_IN_SHUTDOWN
:
733 state
= "SHUTDOWN"; break;
734 case DLM_CTXT_LEAVING
:
735 state
= "LEAVING"; break;
737 state
= "UNKNOWN"; break;
740 /* Domain: xxxxxxxxxx Key: 0xdfbac769 */
741 out
+= snprintf(db
->buf
+ out
, db
->len
- out
,
742 "Domain: %s Key: 0x%08x\n", dlm
->name
, dlm
->key
);
744 /* Thread Pid: xxx Node: xxx State: xxxxx */
745 out
+= snprintf(db
->buf
+ out
, db
->len
- out
,
746 "Thread Pid: %d Node: %d State: %s\n",
747 dlm
->dlm_thread_task
->pid
, dlm
->node_num
, state
);
749 /* Number of Joins: xxx Joining Node: xxx */
750 out
+= snprintf(db
->buf
+ out
, db
->len
- out
,
751 "Number of Joins: %d Joining Node: %d\n",
752 dlm
->num_joins
, dlm
->joining_node
);
754 /* Domain Map: xx xx xx */
755 out
+= snprintf(db
->buf
+ out
, db
->len
- out
, "Domain Map: ");
756 out
+= stringify_nodemap(dlm
->domain_map
, O2NM_MAX_NODES
,
757 db
->buf
+ out
, db
->len
- out
);
758 out
+= snprintf(db
->buf
+ out
, db
->len
- out
, "\n");
760 /* Live Map: xx xx xx */
761 out
+= snprintf(db
->buf
+ out
, db
->len
- out
, "Live Map: ");
762 out
+= stringify_nodemap(dlm
->live_nodes_map
, O2NM_MAX_NODES
,
763 db
->buf
+ out
, db
->len
- out
);
764 out
+= snprintf(db
->buf
+ out
, db
->len
- out
, "\n");
766 /* Mastered Resources Total: xxx Locally: xxx Remotely: ... */
767 out
+= snprintf(db
->buf
+ out
, db
->len
- out
,
768 "Mastered Resources Total: %d Locally: %d "
769 "Remotely: %d Unknown: %d\n",
770 tres
, lres
, rres
, ures
);
772 /* Lists: Dirty=Empty Purge=InUse PendingASTs=Empty ... */
773 out
+= snprintf(db
->buf
+ out
, db
->len
- out
,
774 "Lists: Dirty=%s Purge=%s PendingASTs=%s "
775 "PendingBASTs=%s Master=%s\n",
776 (list_empty(&dlm
->dirty_list
) ? "Empty" : "InUse"),
777 (list_empty(&dlm
->purge_list
) ? "Empty" : "InUse"),
778 (list_empty(&dlm
->pending_asts
) ? "Empty" : "InUse"),
779 (list_empty(&dlm
->pending_basts
) ? "Empty" : "InUse"),
780 (list_empty(&dlm
->master_list
) ? "Empty" : "InUse"));
782 /* Purge Count: xxx Refs: xxx */
783 out
+= snprintf(db
->buf
+ out
, db
->len
- out
,
784 "Purge Count: %d Refs: %d\n", dlm
->purge_count
,
785 atomic_read(&dlm
->dlm_refs
.refcount
));
788 out
+= snprintf(db
->buf
+ out
, db
->len
- out
,
789 "Dead Node: %d\n", dlm
->reco
.dead_node
);
791 /* What about DLM_RECO_STATE_FINALIZE? */
792 if (dlm
->reco
.state
== DLM_RECO_STATE_ACTIVE
)
797 /* Recovery Pid: xxxx Master: xxx State: xxxx */
798 out
+= snprintf(db
->buf
+ out
, db
->len
- out
,
799 "Recovery Pid: %d Master: %d State: %s\n",
800 dlm
->dlm_reco_thread_task
->pid
,
801 dlm
->reco
.new_master
, state
);
803 /* Recovery Map: xx xx */
804 out
+= snprintf(db
->buf
+ out
, db
->len
- out
, "Recovery Map: ");
805 out
+= stringify_nodemap(dlm
->recovery_map
, O2NM_MAX_NODES
,
806 db
->buf
+ out
, db
->len
- out
);
807 out
+= snprintf(db
->buf
+ out
, db
->len
- out
, "\n");
809 /* Recovery Node State: */
810 out
+= snprintf(db
->buf
+ out
, db
->len
- out
, "Recovery Node State:\n");
811 list_for_each_entry(node
, &dlm
->reco
.node_data
, list
) {
812 switch (node
->state
) {
813 case DLM_RECO_NODE_DATA_INIT
:
816 case DLM_RECO_NODE_DATA_REQUESTING
:
817 state
= "REQUESTING";
819 case DLM_RECO_NODE_DATA_DEAD
:
822 case DLM_RECO_NODE_DATA_RECEIVING
:
825 case DLM_RECO_NODE_DATA_REQUESTED
:
828 case DLM_RECO_NODE_DATA_DONE
:
831 case DLM_RECO_NODE_DATA_FINALIZE_SENT
:
832 state
= "FINALIZE-SENT";
838 out
+= snprintf(db
->buf
+ out
, db
->len
- out
, "\t%u - %s\n",
839 node
->node_num
, state
);
842 spin_unlock(&dlm
->spinlock
);
847 static int debug_state_open(struct inode
*inode
, struct file
*file
)
849 struct dlm_ctxt
*dlm
= inode
->i_private
;
850 struct debug_buffer
*db
= NULL
;
852 db
= debug_buffer_allocate();
856 db
->len
= debug_state_print(dlm
, db
);
858 file
->private_data
= db
;
865 static struct file_operations debug_state_fops
= {
866 .open
= debug_state_open
,
867 .release
= debug_buffer_release
,
868 .read
= debug_buffer_read
,
869 .llseek
= debug_buffer_llseek
,
871 /* end - debug state funcs */
873 /* files in subroot */
874 int dlm_debug_init(struct dlm_ctxt
*dlm
)
876 struct dlm_debug_ctxt
*dc
= dlm
->dlm_debug_ctxt
;
878 /* for dumping dlm_ctxt */
879 dc
->debug_state_dentry
= debugfs_create_file(DLM_DEBUGFS_DLM_STATE
,
881 dlm
->dlm_debugfs_subroot
,
882 dlm
, &debug_state_fops
);
883 if (!dc
->debug_state_dentry
) {
888 /* for dumping lockres */
889 dc
->debug_lockres_dentry
=
890 debugfs_create_file(DLM_DEBUGFS_LOCKING_STATE
,
892 dlm
->dlm_debugfs_subroot
,
893 dlm
, &debug_lockres_fops
);
894 if (!dc
->debug_lockres_dentry
) {
899 /* for dumping mles */
900 dc
->debug_mle_dentry
= debugfs_create_file(DLM_DEBUGFS_MLE_STATE
,
902 dlm
->dlm_debugfs_subroot
,
903 dlm
, &debug_mle_fops
);
904 if (!dc
->debug_mle_dentry
) {
913 dlm_debug_shutdown(dlm
);
917 void dlm_debug_shutdown(struct dlm_ctxt
*dlm
)
919 struct dlm_debug_ctxt
*dc
= dlm
->dlm_debug_ctxt
;
922 if (dc
->debug_mle_dentry
)
923 debugfs_remove(dc
->debug_mle_dentry
);
924 if (dc
->debug_lockres_dentry
)
925 debugfs_remove(dc
->debug_lockres_dentry
);
926 if (dc
->debug_state_dentry
)
927 debugfs_remove(dc
->debug_state_dentry
);
932 /* subroot - domain dir */
933 int dlm_create_debugfs_subroot(struct dlm_ctxt
*dlm
)
935 dlm
->dlm_debugfs_subroot
= debugfs_create_dir(dlm
->name
,
937 if (!dlm
->dlm_debugfs_subroot
) {
942 dlm
->dlm_debug_ctxt
= kzalloc(sizeof(struct dlm_debug_ctxt
),
944 if (!dlm
->dlm_debug_ctxt
) {
948 kref_init(&dlm
->dlm_debug_ctxt
->debug_refcnt
);
952 dlm_destroy_debugfs_subroot(dlm
);
956 void dlm_destroy_debugfs_subroot(struct dlm_ctxt
*dlm
)
958 if (dlm
->dlm_debugfs_subroot
)
959 debugfs_remove(dlm
->dlm_debugfs_subroot
);
963 int dlm_create_debugfs_root(void)
965 dlm_debugfs_root
= debugfs_create_dir(DLM_DEBUGFS_DIR
, NULL
);
966 if (!dlm_debugfs_root
) {
973 void dlm_destroy_debugfs_root(void)
975 if (dlm_debugfs_root
)
976 debugfs_remove(dlm_debugfs_root
);
978 #endif /* CONFIG_DEBUG_FS */