1 #define pr_fmt(fmt) "drbd debugfs: " fmt
2 #include <linux/kernel.h>
3 #include <linux/module.h>
4 #include <linux/debugfs.h>
5 #include <linux/seq_file.h>
6 #include <linux/stat.h>
7 #include <linux/jiffies.h>
8 #include <linux/list.h>
12 #include "drbd_debugfs.h"
15 /**********************************************************************
16 * Whenever you change the file format, remember to bump the version. *
17 **********************************************************************/
19 static struct dentry *drbd_debugfs_root;
20 static struct dentry *drbd_debugfs_version;
21 static struct dentry *drbd_debugfs_resources;
22 static struct dentry *drbd_debugfs_minors;
24 static void seq_print_age_or_dash(struct seq_file *m, bool valid, unsigned long dt)
27 seq_printf(m, "\t%d", jiffies_to_msecs(dt));
32 static void __seq_print_rq_state_bit(struct seq_file *m,
33 bool is_set, char *sep, const char *set_name, const char *unset_name)
35 if (is_set && set_name) {
37 seq_puts(m, set_name);
39 } else if (!is_set && unset_name) {
41 seq_puts(m, unset_name);
46 static void seq_print_rq_state_bit(struct seq_file *m,
47 bool is_set, char *sep, const char *set_name)
49 __seq_print_rq_state_bit(m, is_set, sep, set_name, NULL);
52 /* pretty print enum drbd_req_state_bits req->rq_state */
53 static void seq_print_request_state(struct seq_file *m, struct drbd_request *req)
55 unsigned int s = req->rq_state;
57 seq_printf(m, "\t0x%08x", s);
58 seq_printf(m, "\tmaster: %s", req->master_bio ? "pending" : "completed");
60 /* RQ_WRITE ignored, already reported */
61 seq_puts(m, "\tlocal:");
62 seq_print_rq_state_bit(m, s & RQ_IN_ACT_LOG, &sep, "in-AL");
63 seq_print_rq_state_bit(m, s & RQ_POSTPONED, &sep, "postponed");
64 seq_print_rq_state_bit(m, s & RQ_COMPLETION_SUSP, &sep, "suspended");
66 seq_print_rq_state_bit(m, s & RQ_LOCAL_PENDING, &sep, "pending");
67 seq_print_rq_state_bit(m, s & RQ_LOCAL_COMPLETED, &sep, "completed");
68 seq_print_rq_state_bit(m, s & RQ_LOCAL_ABORTED, &sep, "aborted");
69 seq_print_rq_state_bit(m, s & RQ_LOCAL_OK, &sep, "ok");
73 /* for_each_connection ... */
74 seq_printf(m, "\tnet:");
76 seq_print_rq_state_bit(m, s & RQ_NET_PENDING, &sep, "pending");
77 seq_print_rq_state_bit(m, s & RQ_NET_QUEUED, &sep, "queued");
78 seq_print_rq_state_bit(m, s & RQ_NET_SENT, &sep, "sent");
79 seq_print_rq_state_bit(m, s & RQ_NET_DONE, &sep, "done");
80 seq_print_rq_state_bit(m, s & RQ_NET_SIS, &sep, "sis");
81 seq_print_rq_state_bit(m, s & RQ_NET_OK, &sep, "ok");
87 seq_print_rq_state_bit(m, s & RQ_EXP_RECEIVE_ACK, &sep, "B");
88 seq_print_rq_state_bit(m, s & RQ_EXP_WRITE_ACK, &sep, "C");
89 seq_print_rq_state_bit(m, s & RQ_EXP_BARR_ACK, &sep, "barr");
95 static void seq_print_one_request(struct seq_file *m, struct drbd_request *req, unsigned long now)
97 /* change anything here, fixup header below! */
98 unsigned int s = req->rq_state;
100 #define RQ_HDR_1 "epoch\tsector\tsize\trw"
101 seq_printf(m, "0x%x\t%llu\t%u\t%s",
103 (unsigned long long)req->i.sector, req->i.size >> 9,
104 (s & RQ_WRITE) ? "W" : "R");
106 #define RQ_HDR_2 "\tstart\tin AL\tsubmit"
107 seq_printf(m, "\t%d", jiffies_to_msecs(now - req->start_jif));
108 seq_print_age_or_dash(m, s & RQ_IN_ACT_LOG, now - req->in_actlog_jif);
109 seq_print_age_or_dash(m, s & RQ_LOCAL_PENDING, now - req->pre_submit_jif);
111 #define RQ_HDR_3 "\tsent\tacked\tdone"
112 seq_print_age_or_dash(m, s & RQ_NET_SENT, now - req->pre_send_jif);
113 seq_print_age_or_dash(m, (s & RQ_NET_SENT) && !(s & RQ_NET_PENDING), now - req->acked_jif);
114 seq_print_age_or_dash(m, s & RQ_NET_DONE, now - req->net_done_jif);
116 #define RQ_HDR_4 "\tstate\n"
117 seq_print_request_state(m, req);
119 #define RQ_HDR RQ_HDR_1 RQ_HDR_2 RQ_HDR_3 RQ_HDR_4
121 static void seq_print_minor_vnr_req(struct seq_file *m, struct drbd_request *req, unsigned long now)
123 seq_printf(m, "%u\t%u\t", req->device->minor, req->device->vnr);
124 seq_print_one_request(m, req, now);
127 static void seq_print_resource_pending_meta_io(struct seq_file *m, struct drbd_resource *resource, unsigned long now)
129 struct drbd_device *device;
132 seq_puts(m, "minor\tvnr\tstart\tsubmit\tintent\n");
134 idr_for_each_entry(&resource->devices, device, i) {
135 struct drbd_md_io tmp;
136 /* In theory this is racy,
137 * in the sense that there could have been a
138 * drbd_md_put_buffer(); drbd_md_get_buffer();
139 * between accessing these members here. */
141 if (atomic_read(&tmp.in_use)) {
142 seq_printf(m, "%u\t%u\t%d\t",
143 device->minor, device->vnr,
144 jiffies_to_msecs(now - tmp.start_jif));
145 if (time_before(tmp.submit_jif, tmp.start_jif))
148 seq_printf(m, "%d\t", jiffies_to_msecs(now - tmp.submit_jif));
149 seq_printf(m, "%s\n", tmp.current_use);
155 static void seq_print_waiting_for_AL(struct seq_file *m, struct drbd_resource *resource, unsigned long now)
157 struct drbd_device *device;
160 seq_puts(m, "minor\tvnr\tage\t#waiting\n");
162 idr_for_each_entry(&resource->devices, device, i) {
164 struct drbd_request *req;
165 int n = atomic_read(&device->ap_actlog_cnt);
167 spin_lock_irq(&device->resource->req_lock);
168 req = list_first_entry_or_null(&device->pending_master_completion[1],
169 struct drbd_request, req_pending_master_completion);
170 /* if the oldest request does not wait for the activity log
171 * it is not interesting for us here */
172 if (req && !(req->rq_state & RQ_IN_ACT_LOG))
173 jif = req->start_jif;
176 spin_unlock_irq(&device->resource->req_lock);
179 seq_printf(m, "%u\t%u\t", device->minor, device->vnr);
181 seq_printf(m, "%u\t", jiffies_to_msecs(now - jif));
184 seq_printf(m, "%u\n", n);
190 static void seq_print_device_bitmap_io(struct seq_file *m, struct drbd_device *device, unsigned long now)
192 struct drbd_bm_aio_ctx *ctx;
193 unsigned long start_jif;
194 unsigned int in_flight;
196 spin_lock_irq(&device->resource->req_lock);
197 ctx = list_first_entry_or_null(&device->pending_bitmap_io, struct drbd_bm_aio_ctx, list);
198 if (ctx && ctx->done)
201 start_jif = ctx->start_jif;
202 in_flight = atomic_read(&ctx->in_flight);
205 spin_unlock_irq(&device->resource->req_lock);
207 seq_printf(m, "%u\t%u\t%c\t%u\t%u\n",
208 device->minor, device->vnr,
209 (flags & BM_AIO_READ) ? 'R' : 'W',
210 jiffies_to_msecs(now - start_jif),
215 static void seq_print_resource_pending_bitmap_io(struct seq_file *m, struct drbd_resource *resource, unsigned long now)
217 struct drbd_device *device;
220 seq_puts(m, "minor\tvnr\trw\tage\t#in-flight\n");
222 idr_for_each_entry(&resource->devices, device, i) {
223 seq_print_device_bitmap_io(m, device, now);
228 /* pretty print enum peer_req->flags */
229 static void seq_print_peer_request_flags(struct seq_file *m, struct drbd_peer_request *peer_req)
231 unsigned long f = peer_req->flags;
234 __seq_print_rq_state_bit(m, f & EE_SUBMITTED, &sep, "submitted", "preparing");
235 __seq_print_rq_state_bit(m, f & EE_APPLICATION, &sep, "application", "internal");
236 seq_print_rq_state_bit(m, f & EE_CALL_AL_COMPLETE_IO, &sep, "in-AL");
237 seq_print_rq_state_bit(m, f & EE_SEND_WRITE_ACK, &sep, "C");
238 seq_print_rq_state_bit(m, f & EE_MAY_SET_IN_SYNC, &sep, "set-in-sync");
241 __seq_print_rq_state_bit(m, f & EE_IS_TRIM_USE_ZEROOUT, &sep, "zero-out", "trim");
242 seq_print_rq_state_bit(m, f & EE_WRITE_SAME, &sep, "write-same");
246 static void seq_print_peer_request(struct seq_file *m,
247 struct drbd_device *device, struct list_head *lh,
250 bool reported_preparing = false;
251 struct drbd_peer_request *peer_req;
252 list_for_each_entry(peer_req, lh, w.list) {
253 if (reported_preparing && !(peer_req->flags & EE_SUBMITTED))
257 seq_printf(m, "%u\t%u\t", device->minor, device->vnr);
259 seq_printf(m, "%llu\t%u\t%c\t%u\t",
260 (unsigned long long)peer_req->i.sector, peer_req->i.size >> 9,
261 (peer_req->flags & EE_WRITE) ? 'W' : 'R',
262 jiffies_to_msecs(now - peer_req->submit_jif));
263 seq_print_peer_request_flags(m, peer_req);
264 if (peer_req->flags & EE_SUBMITTED)
267 reported_preparing = true;
271 static void seq_print_device_peer_requests(struct seq_file *m,
272 struct drbd_device *device, unsigned long now)
274 seq_puts(m, "minor\tvnr\tsector\tsize\trw\tage\tflags\n");
275 spin_lock_irq(&device->resource->req_lock);
276 seq_print_peer_request(m, device, &device->active_ee, now);
277 seq_print_peer_request(m, device, &device->read_ee, now);
278 seq_print_peer_request(m, device, &device->sync_ee, now);
279 spin_unlock_irq(&device->resource->req_lock);
280 if (test_bit(FLUSH_PENDING, &device->flags)) {
281 seq_printf(m, "%u\t%u\t-\t-\tF\t%u\tflush\n",
282 device->minor, device->vnr,
283 jiffies_to_msecs(now - device->flush_jif));
287 static void seq_print_resource_pending_peer_requests(struct seq_file *m,
288 struct drbd_resource *resource, unsigned long now)
290 struct drbd_device *device;
294 idr_for_each_entry(&resource->devices, device, i) {
295 seq_print_device_peer_requests(m, device, now);
300 static void seq_print_resource_transfer_log_summary(struct seq_file *m,
301 struct drbd_resource *resource,
302 struct drbd_connection *connection,
305 struct drbd_request *req;
306 unsigned int count = 0;
307 unsigned int show_state = 0;
309 seq_puts(m, "n\tdevice\tvnr\t" RQ_HDR);
310 spin_lock_irq(&resource->req_lock);
311 list_for_each_entry(req, &connection->transfer_log, tl_requests) {
312 unsigned int tmp = 0;
316 /* don't disable irq "forever" */
317 if (!(count & 0x1ff)) {
318 struct drbd_request *req_next;
319 kref_get(&req->kref);
320 spin_unlock_irq(&resource->req_lock);
322 spin_lock_irq(&resource->req_lock);
323 req_next = list_next_entry(req, tl_requests);
324 if (kref_put(&req->kref, drbd_req_destroy))
326 if (&req->tl_requests == &connection->transfer_log)
332 /* This is meant to summarize timing issues, to be able to tell
333 * local disk problems from network problems.
334 * Skip requests, if we have shown an even older request with
335 * similar aspects already. */
336 if (req->master_bio == NULL)
338 if ((s & RQ_LOCAL_MASK) && (s & RQ_LOCAL_PENDING))
340 if (s & RQ_NET_MASK) {
341 if (!(s & RQ_NET_SENT))
343 if (s & RQ_NET_PENDING)
345 if (!(s & RQ_NET_DONE))
348 if ((tmp & show_state) == tmp)
351 seq_printf(m, "%u\t", count);
352 seq_print_minor_vnr_req(m, req, now);
353 if (show_state == 0x1f)
356 spin_unlock_irq(&resource->req_lock);
359 /* TODO: transfer_log and friends should be moved to resource */
360 static int in_flight_summary_show(struct seq_file *m, void *pos)
362 struct drbd_resource *resource = m->private;
363 struct drbd_connection *connection;
364 unsigned long jif = jiffies;
366 connection = first_connection(resource);
367 /* This does not happen, actually.
368 * But be robust and prepare for future code changes. */
369 if (!connection || !kref_get_unless_zero(&connection->kref))
372 /* BUMP me if you change the file format/content/presentation */
373 seq_printf(m, "v: %u\n\n", 0);
375 seq_puts(m, "oldest bitmap IO\n");
376 seq_print_resource_pending_bitmap_io(m, resource, jif);
379 seq_puts(m, "meta data IO\n");
380 seq_print_resource_pending_meta_io(m, resource, jif);
383 seq_puts(m, "socket buffer stats\n");
384 /* for each connection ... once we have more than one */
386 if (connection->data.socket) {
387 /* open coded SIOCINQ, the "relevant" part */
388 struct tcp_sock *tp = tcp_sk(connection->data.socket->sk);
389 int answ = tp->rcv_nxt - tp->copied_seq;
390 seq_printf(m, "unread receive buffer: %u Byte\n", answ);
391 /* open coded SIOCOUTQ, the "relevant" part */
392 answ = tp->write_seq - tp->snd_una;
393 seq_printf(m, "unacked send buffer: %u Byte\n", answ);
398 seq_puts(m, "oldest peer requests\n");
399 seq_print_resource_pending_peer_requests(m, resource, jif);
402 seq_puts(m, "application requests waiting for activity log\n");
403 seq_print_waiting_for_AL(m, resource, jif);
406 seq_puts(m, "oldest application requests\n");
407 seq_print_resource_transfer_log_summary(m, resource, connection, jif);
412 seq_printf(m, "generated in %d ms\n", jiffies_to_msecs(jif));
413 kref_put(&connection->kref, drbd_destroy_connection);
417 /* make sure at *open* time that the respective object won't go away. */
418 static int drbd_single_open(struct file *file, int (*show)(struct seq_file *, void *),
419 void *data, struct kref *kref,
420 void (*release)(struct kref *))
422 struct dentry *parent;
425 /* Are we still linked,
426 * or has debugfs_remove() already been called? */
427 parent = file->f_path.dentry->d_parent;
428 /* not sure if this can happen: */
429 if (!parent || d_really_is_negative(parent))
431 /* serialize with d_delete() */
432 inode_lock(d_inode(parent));
433 /* Make sure the object is still alive */
434 if (simple_positive(file->f_path.dentry)
435 && kref_get_unless_zero(kref))
437 inode_unlock(d_inode(parent));
439 ret = single_open(file, show, data);
441 kref_put(kref, release);
447 static int in_flight_summary_open(struct inode *inode, struct file *file)
449 struct drbd_resource *resource = inode->i_private;
450 return drbd_single_open(file, in_flight_summary_show, resource,
451 &resource->kref, drbd_destroy_resource);
454 static int in_flight_summary_release(struct inode *inode, struct file *file)
456 struct drbd_resource *resource = inode->i_private;
457 kref_put(&resource->kref, drbd_destroy_resource);
458 return single_release(inode, file);
461 static const struct file_operations in_flight_summary_fops = {
462 .owner = THIS_MODULE,
463 .open = in_flight_summary_open,
466 .release = in_flight_summary_release,
469 void drbd_debugfs_resource_add(struct drbd_resource *resource)
471 struct dentry *dentry;
472 if (!drbd_debugfs_resources)
475 dentry = debugfs_create_dir(resource->name, drbd_debugfs_resources);
476 if (IS_ERR_OR_NULL(dentry))
478 resource->debugfs_res = dentry;
480 dentry = debugfs_create_dir("volumes", resource->debugfs_res);
481 if (IS_ERR_OR_NULL(dentry))
483 resource->debugfs_res_volumes = dentry;
485 dentry = debugfs_create_dir("connections", resource->debugfs_res);
486 if (IS_ERR_OR_NULL(dentry))
488 resource->debugfs_res_connections = dentry;
490 dentry = debugfs_create_file("in_flight_summary", S_IRUSR|S_IRGRP,
491 resource->debugfs_res, resource,
492 &in_flight_summary_fops);
493 if (IS_ERR_OR_NULL(dentry))
495 resource->debugfs_res_in_flight_summary = dentry;
499 drbd_debugfs_resource_cleanup(resource);
500 drbd_err(resource, "failed to create debugfs dentry\n");
503 static void drbd_debugfs_remove(struct dentry **dp)
509 void drbd_debugfs_resource_cleanup(struct drbd_resource *resource)
511 /* it is ok to call debugfs_remove(NULL) */
512 drbd_debugfs_remove(&resource->debugfs_res_in_flight_summary);
513 drbd_debugfs_remove(&resource->debugfs_res_connections);
514 drbd_debugfs_remove(&resource->debugfs_res_volumes);
515 drbd_debugfs_remove(&resource->debugfs_res);
518 static void seq_print_one_timing_detail(struct seq_file *m,
519 const struct drbd_thread_timing_details *tdp,
522 struct drbd_thread_timing_details td;
524 * use temporary assignment to get at consistent data. */
527 } while (td.cb_nr != tdp->cb_nr);
530 seq_printf(m, "%u\t%d\t%s:%u\t%ps\n",
532 jiffies_to_msecs(now - td.start_jif),
533 td.caller_fn, td.line,
537 static void seq_print_timing_details(struct seq_file *m,
539 unsigned int cb_nr, struct drbd_thread_timing_details *tdp, unsigned long now)
541 unsigned int start_idx;
544 seq_printf(m, "%s\n", title);
545 /* If not much is going on, this will result in natural ordering.
546 * If it is very busy, we will possibly skip events, or even see wrap
547 * arounds, which could only be avoided with locking.
549 start_idx = cb_nr % DRBD_THREAD_DETAILS_HIST;
550 for (i = start_idx; i < DRBD_THREAD_DETAILS_HIST; i++)
551 seq_print_one_timing_detail(m, tdp+i, now);
552 for (i = 0; i < start_idx; i++)
553 seq_print_one_timing_detail(m, tdp+i, now);
556 static int callback_history_show(struct seq_file *m, void *ignored)
558 struct drbd_connection *connection = m->private;
559 unsigned long jif = jiffies;
561 /* BUMP me if you change the file format/content/presentation */
562 seq_printf(m, "v: %u\n\n", 0);
564 seq_puts(m, "n\tage\tcallsite\tfn\n");
565 seq_print_timing_details(m, "worker", connection->w_cb_nr, connection->w_timing_details, jif);
566 seq_print_timing_details(m, "receiver", connection->r_cb_nr, connection->r_timing_details, jif);
570 static int callback_history_open(struct inode *inode, struct file *file)
572 struct drbd_connection *connection = inode->i_private;
573 return drbd_single_open(file, callback_history_show, connection,
574 &connection->kref, drbd_destroy_connection);
577 static int callback_history_release(struct inode *inode, struct file *file)
579 struct drbd_connection *connection = inode->i_private;
580 kref_put(&connection->kref, drbd_destroy_connection);
581 return single_release(inode, file);
584 static const struct file_operations connection_callback_history_fops = {
585 .owner = THIS_MODULE,
586 .open = callback_history_open,
589 .release = callback_history_release,
592 static int connection_oldest_requests_show(struct seq_file *m, void *ignored)
594 struct drbd_connection *connection = m->private;
595 unsigned long now = jiffies;
596 struct drbd_request *r1, *r2;
598 /* BUMP me if you change the file format/content/presentation */
599 seq_printf(m, "v: %u\n\n", 0);
601 spin_lock_irq(&connection->resource->req_lock);
602 r1 = connection->req_next;
604 seq_print_minor_vnr_req(m, r1, now);
605 r2 = connection->req_ack_pending;
606 if (r2 && r2 != r1) {
608 seq_print_minor_vnr_req(m, r1, now);
610 r2 = connection->req_not_net_done;
612 seq_print_minor_vnr_req(m, r2, now);
613 spin_unlock_irq(&connection->resource->req_lock);
617 static int connection_oldest_requests_open(struct inode *inode, struct file *file)
619 struct drbd_connection *connection = inode->i_private;
620 return drbd_single_open(file, connection_oldest_requests_show, connection,
621 &connection->kref, drbd_destroy_connection);
624 static int connection_oldest_requests_release(struct inode *inode, struct file *file)
626 struct drbd_connection *connection = inode->i_private;
627 kref_put(&connection->kref, drbd_destroy_connection);
628 return single_release(inode, file);
631 static const struct file_operations connection_oldest_requests_fops = {
632 .owner = THIS_MODULE,
633 .open = connection_oldest_requests_open,
636 .release = connection_oldest_requests_release,
639 void drbd_debugfs_connection_add(struct drbd_connection *connection)
641 struct dentry *conns_dir = connection->resource->debugfs_res_connections;
642 struct dentry *dentry;
646 /* Once we enable mutliple peers,
647 * these connections will have descriptive names.
648 * For now, it is just the one connection to the (only) "peer". */
649 dentry = debugfs_create_dir("peer", conns_dir);
650 if (IS_ERR_OR_NULL(dentry))
652 connection->debugfs_conn = dentry;
654 dentry = debugfs_create_file("callback_history", S_IRUSR|S_IRGRP,
655 connection->debugfs_conn, connection,
656 &connection_callback_history_fops);
657 if (IS_ERR_OR_NULL(dentry))
659 connection->debugfs_conn_callback_history = dentry;
661 dentry = debugfs_create_file("oldest_requests", S_IRUSR|S_IRGRP,
662 connection->debugfs_conn, connection,
663 &connection_oldest_requests_fops);
664 if (IS_ERR_OR_NULL(dentry))
666 connection->debugfs_conn_oldest_requests = dentry;
670 drbd_debugfs_connection_cleanup(connection);
671 drbd_err(connection, "failed to create debugfs dentry\n");
674 void drbd_debugfs_connection_cleanup(struct drbd_connection *connection)
676 drbd_debugfs_remove(&connection->debugfs_conn_callback_history);
677 drbd_debugfs_remove(&connection->debugfs_conn_oldest_requests);
678 drbd_debugfs_remove(&connection->debugfs_conn);
681 static void resync_dump_detail(struct seq_file *m, struct lc_element *e)
683 struct bm_extent *bme = lc_entry(e, struct bm_extent, lce);
685 seq_printf(m, "%5d %s %s %s", bme->rs_left,
686 test_bit(BME_NO_WRITES, &bme->flags) ? "NO_WRITES" : "---------",
687 test_bit(BME_LOCKED, &bme->flags) ? "LOCKED" : "------",
688 test_bit(BME_PRIORITY, &bme->flags) ? "PRIORITY" : "--------"
692 static int device_resync_extents_show(struct seq_file *m, void *ignored)
694 struct drbd_device *device = m->private;
696 /* BUMP me if you change the file format/content/presentation */
697 seq_printf(m, "v: %u\n\n", 0);
699 if (get_ldev_if_state(device, D_FAILED)) {
700 lc_seq_printf_stats(m, device->resync);
701 lc_seq_dump_details(m, device->resync, "rs_left flags", resync_dump_detail);
707 static int device_act_log_extents_show(struct seq_file *m, void *ignored)
709 struct drbd_device *device = m->private;
711 /* BUMP me if you change the file format/content/presentation */
712 seq_printf(m, "v: %u\n\n", 0);
714 if (get_ldev_if_state(device, D_FAILED)) {
715 lc_seq_printf_stats(m, device->act_log);
716 lc_seq_dump_details(m, device->act_log, "", NULL);
722 static int device_oldest_requests_show(struct seq_file *m, void *ignored)
724 struct drbd_device *device = m->private;
725 struct drbd_resource *resource = device->resource;
726 unsigned long now = jiffies;
727 struct drbd_request *r1, *r2;
730 /* BUMP me if you change the file format/content/presentation */
731 seq_printf(m, "v: %u\n\n", 0);
734 spin_lock_irq(&resource->req_lock);
735 /* WRITE, then READ */
736 for (i = 1; i >= 0; --i) {
737 r1 = list_first_entry_or_null(&device->pending_master_completion[i],
738 struct drbd_request, req_pending_master_completion);
739 r2 = list_first_entry_or_null(&device->pending_completion[i],
740 struct drbd_request, req_pending_local);
742 seq_print_one_request(m, r1, now);
744 seq_print_one_request(m, r2, now);
746 spin_unlock_irq(&resource->req_lock);
750 static int device_data_gen_id_show(struct seq_file *m, void *ignored)
752 struct drbd_device *device = m->private;
754 enum drbd_uuid_index idx;
756 if (!get_ldev_if_state(device, D_FAILED))
759 md = &device->ldev->md;
760 spin_lock_irq(&md->uuid_lock);
761 for (idx = UI_CURRENT; idx <= UI_HISTORY_END; idx++) {
762 seq_printf(m, "0x%016llX\n", md->uuid[idx]);
764 spin_unlock_irq(&md->uuid_lock);
769 static int device_ed_gen_id_show(struct seq_file *m, void *ignored)
771 struct drbd_device *device = m->private;
772 seq_printf(m, "0x%016llX\n", (unsigned long long)device->ed_uuid);
776 #define drbd_debugfs_device_attr(name) \
777 static int device_ ## name ## _open(struct inode *inode, struct file *file) \
779 struct drbd_device *device = inode->i_private; \
780 return drbd_single_open(file, device_ ## name ## _show, device, \
781 &device->kref, drbd_destroy_device); \
783 static int device_ ## name ## _release(struct inode *inode, struct file *file) \
785 struct drbd_device *device = inode->i_private; \
786 kref_put(&device->kref, drbd_destroy_device); \
787 return single_release(inode, file); \
789 static const struct file_operations device_ ## name ## _fops = { \
790 .owner = THIS_MODULE, \
791 .open = device_ ## name ## _open, \
793 .llseek = seq_lseek, \
794 .release = device_ ## name ## _release, \
797 drbd_debugfs_device_attr(oldest_requests)
798 drbd_debugfs_device_attr(act_log_extents)
799 drbd_debugfs_device_attr(resync_extents)
800 drbd_debugfs_device_attr(data_gen_id)
801 drbd_debugfs_device_attr(ed_gen_id)
803 void drbd_debugfs_device_add(struct drbd_device *device)
805 struct dentry *vols_dir = device->resource->debugfs_res_volumes;
806 char minor_buf[8]; /* MINORMASK, MINORBITS == 20; */
807 char vnr_buf[8]; /* volume number vnr is even 16 bit only; */
808 char *slink_name = NULL;
810 struct dentry *dentry;
811 if (!vols_dir || !drbd_debugfs_minors)
814 snprintf(vnr_buf, sizeof(vnr_buf), "%u", device->vnr);
815 dentry = debugfs_create_dir(vnr_buf, vols_dir);
816 if (IS_ERR_OR_NULL(dentry))
818 device->debugfs_vol = dentry;
820 snprintf(minor_buf, sizeof(minor_buf), "%u", device->minor);
821 slink_name = kasprintf(GFP_KERNEL, "../resources/%s/volumes/%u",
822 device->resource->name, device->vnr);
825 dentry = debugfs_create_symlink(minor_buf, drbd_debugfs_minors, slink_name);
828 if (IS_ERR_OR_NULL(dentry))
830 device->debugfs_minor = dentry;
832 #define DCF(name) do { \
833 dentry = debugfs_create_file(#name, S_IRUSR|S_IRGRP, \
834 device->debugfs_vol, device, \
835 &device_ ## name ## _fops); \
836 if (IS_ERR_OR_NULL(dentry)) \
838 device->debugfs_vol_ ## name = dentry; \
841 DCF(oldest_requests);
842 DCF(act_log_extents);
850 drbd_debugfs_device_cleanup(device);
851 drbd_err(device, "failed to create debugfs entries\n");
854 void drbd_debugfs_device_cleanup(struct drbd_device *device)
856 drbd_debugfs_remove(&device->debugfs_minor);
857 drbd_debugfs_remove(&device->debugfs_vol_oldest_requests);
858 drbd_debugfs_remove(&device->debugfs_vol_act_log_extents);
859 drbd_debugfs_remove(&device->debugfs_vol_resync_extents);
860 drbd_debugfs_remove(&device->debugfs_vol_data_gen_id);
861 drbd_debugfs_remove(&device->debugfs_vol_ed_gen_id);
862 drbd_debugfs_remove(&device->debugfs_vol);
865 void drbd_debugfs_peer_device_add(struct drbd_peer_device *peer_device)
867 struct dentry *conn_dir = peer_device->connection->debugfs_conn;
868 struct dentry *dentry;
874 snprintf(vnr_buf, sizeof(vnr_buf), "%u", peer_device->device->vnr);
875 dentry = debugfs_create_dir(vnr_buf, conn_dir);
876 if (IS_ERR_OR_NULL(dentry))
878 peer_device->debugfs_peer_dev = dentry;
882 drbd_debugfs_peer_device_cleanup(peer_device);
883 drbd_err(peer_device, "failed to create debugfs entries\n");
886 void drbd_debugfs_peer_device_cleanup(struct drbd_peer_device *peer_device)
888 drbd_debugfs_remove(&peer_device->debugfs_peer_dev);
891 static int drbd_version_show(struct seq_file *m, void *ignored)
893 seq_printf(m, "# %s\n", drbd_buildtag());
894 seq_printf(m, "VERSION=%s\n", REL_VERSION);
895 seq_printf(m, "API_VERSION=%u\n", API_VERSION);
896 seq_printf(m, "PRO_VERSION_MIN=%u\n", PRO_VERSION_MIN);
897 seq_printf(m, "PRO_VERSION_MAX=%u\n", PRO_VERSION_MAX);
901 static int drbd_version_open(struct inode *inode, struct file *file)
903 return single_open(file, drbd_version_show, NULL);
906 static const struct file_operations drbd_version_fops = {
907 .owner = THIS_MODULE,
908 .open = drbd_version_open,
911 .release = single_release,
914 /* not __exit, may be indirectly called
915 * from the module-load-failure path as well. */
916 void drbd_debugfs_cleanup(void)
918 drbd_debugfs_remove(&drbd_debugfs_resources);
919 drbd_debugfs_remove(&drbd_debugfs_minors);
920 drbd_debugfs_remove(&drbd_debugfs_version);
921 drbd_debugfs_remove(&drbd_debugfs_root);
924 int __init drbd_debugfs_init(void)
926 struct dentry *dentry;
928 dentry = debugfs_create_dir("drbd", NULL);
929 if (IS_ERR_OR_NULL(dentry))
931 drbd_debugfs_root = dentry;
933 dentry = debugfs_create_file("version", 0444, drbd_debugfs_root, NULL, &drbd_version_fops);
934 if (IS_ERR_OR_NULL(dentry))
936 drbd_debugfs_version = dentry;
938 dentry = debugfs_create_dir("resources", drbd_debugfs_root);
939 if (IS_ERR_OR_NULL(dentry))
941 drbd_debugfs_resources = dentry;
943 dentry = debugfs_create_dir("minors", drbd_debugfs_root);
944 if (IS_ERR_OR_NULL(dentry))
946 drbd_debugfs_minors = dentry;
950 drbd_debugfs_cleanup();
952 return PTR_ERR(dentry);