--- /dev/null
+/* -*- mode: c; c-basic-offset: 8; -*-
+ * vim: noexpandtab sw=8 ts=8 sts=0:
+ *
+ * dlmdebug.c
+ *
+ * debug functionality for the dlm
+ *
+ * Copyright (C) 2004, 2008 Oracle. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public
+ * License along with this program; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 021110-1307, USA.
+ *
+ */
+
+#include <linux/types.h>
+#include <linux/slab.h>
+#include <linux/highmem.h>
+#include <linux/sysctl.h>
+#include <linux/spinlock.h>
+#include <linux/debugfs.h>
+#include <linux/export.h>
+
+#include "cluster/heartbeat.h"
+#include "cluster/nodemanager.h"
+#include "cluster/tcp.h"
+
+#include "dlmapi.h"
+#include "dlmcommon.h"
+#include "dlmdomain.h"
+#include "dlmdebug.h"
+
+#define MLOG_MASK_PREFIX ML_DLM
+#include "cluster/masklog.h"
+
+static int stringify_lockname(const char *lockname, int locklen, char *buf,
+ int len);
+
+void dlm_print_one_lock_resource(struct dlm_lock_resource *res)
+{
+ spin_lock(&res->spinlock);
+ __dlm_print_one_lock_resource(res);
+ spin_unlock(&res->spinlock);
+}
+
+static void dlm_print_lockres_refmap(struct dlm_lock_resource *res)
+{
+ int bit;
+ assert_spin_locked(&res->spinlock);
+
+ printk(" refmap nodes: [ ");
+ bit = 0;
+ while (1) {
+ bit = find_next_bit(res->refmap, O2NM_MAX_NODES, bit);
+ if (bit >= O2NM_MAX_NODES)
+ break;
+ printk("%u ", bit);
+ bit++;
+ }
+ printk("], inflight=%u\n", res->inflight_locks);
+}
+
+static void __dlm_print_lock(struct dlm_lock *lock)
+{
+ spin_lock(&lock->spinlock);
+
+ printk(" type=%d, conv=%d, node=%u, cookie=%u:%llu, "
+ "ref=%u, ast=(empty=%c,pend=%c), bast=(empty=%c,pend=%c), "
+ "pending=(conv=%c,lock=%c,cancel=%c,unlock=%c)\n",
+ lock->ml.type, lock->ml.convert_type, lock->ml.node,
+ dlm_get_lock_cookie_node(be64_to_cpu(lock->ml.cookie)),
+ dlm_get_lock_cookie_seq(be64_to_cpu(lock->ml.cookie)),
+ atomic_read(&lock->lock_refs.refcount),
+ (list_empty(&lock->ast_list) ? 'y' : 'n'),
+ (lock->ast_pending ? 'y' : 'n'),
+ (list_empty(&lock->bast_list) ? 'y' : 'n'),
+ (lock->bast_pending ? 'y' : 'n'),
+ (lock->convert_pending ? 'y' : 'n'),
+ (lock->lock_pending ? 'y' : 'n'),
+ (lock->cancel_pending ? 'y' : 'n'),
+ (lock->unlock_pending ? 'y' : 'n'));
+
+ spin_unlock(&lock->spinlock);
+}
+
+void __dlm_print_one_lock_resource(struct dlm_lock_resource *res)
+{
+ struct dlm_lock *lock;
+ char buf[DLM_LOCKID_NAME_MAX];
+
+ assert_spin_locked(&res->spinlock);
+
+ stringify_lockname(res->lockname.name, res->lockname.len,
+ buf, sizeof(buf));
+ printk("lockres: %s, owner=%u, state=%u\n",
+ buf, res->owner, res->state);
+ printk(" last used: %lu, refcnt: %u, on purge list: %s\n",
+ res->last_used, atomic_read(&res->refs.refcount),
+ list_empty(&res->purge) ? "no" : "yes");
+ printk(" on dirty list: %s, on reco list: %s, "
+ "migrating pending: %s\n",
+ list_empty(&res->dirty) ? "no" : "yes",
+ list_empty(&res->recovering) ? "no" : "yes",
+ res->migration_pending ? "yes" : "no");
+ printk(" inflight locks: %d, asts reserved: %d\n",
+ res->inflight_locks, atomic_read(&res->asts_reserved));
+ dlm_print_lockres_refmap(res);
+ printk(" granted queue:\n");
+ list_for_each_entry(lock, &res->granted, list) {
+ __dlm_print_lock(lock);
+ }
+ printk(" converting queue:\n");
+ list_for_each_entry(lock, &res->converting, list) {
+ __dlm_print_lock(lock);
+ }
+ printk(" blocked queue:\n");
+ list_for_each_entry(lock, &res->blocked, list) {
+ __dlm_print_lock(lock);
+ }
+}
+
+void dlm_print_one_lock(struct dlm_lock *lockid)
+{
+ dlm_print_one_lock_resource(lockid->lockres);
+}
+EXPORT_SYMBOL_GPL(dlm_print_one_lock);
+
+static const char *dlm_errnames[] = {
+ [DLM_NORMAL] = "DLM_NORMAL",
+ [DLM_GRANTED] = "DLM_GRANTED",
+ [DLM_DENIED] = "DLM_DENIED",
+ [DLM_DENIED_NOLOCKS] = "DLM_DENIED_NOLOCKS",
+ [DLM_WORKING] = "DLM_WORKING",
+ [DLM_BLOCKED] = "DLM_BLOCKED",
+ [DLM_BLOCKED_ORPHAN] = "DLM_BLOCKED_ORPHAN",
+ [DLM_DENIED_GRACE_PERIOD] = "DLM_DENIED_GRACE_PERIOD",
+ [DLM_SYSERR] = "DLM_SYSERR",
+ [DLM_NOSUPPORT] = "DLM_NOSUPPORT",
+ [DLM_CANCELGRANT] = "DLM_CANCELGRANT",
+ [DLM_IVLOCKID] = "DLM_IVLOCKID",
+ [DLM_SYNC] = "DLM_SYNC",
+ [DLM_BADTYPE] = "DLM_BADTYPE",
+ [DLM_BADRESOURCE] = "DLM_BADRESOURCE",
+ [DLM_MAXHANDLES] = "DLM_MAXHANDLES",
+ [DLM_NOCLINFO] = "DLM_NOCLINFO",
+ [DLM_NOLOCKMGR] = "DLM_NOLOCKMGR",
+ [DLM_NOPURGED] = "DLM_NOPURGED",
+ [DLM_BADARGS] = "DLM_BADARGS",
+ [DLM_VOID] = "DLM_VOID",
+ [DLM_NOTQUEUED] = "DLM_NOTQUEUED",
+ [DLM_IVBUFLEN] = "DLM_IVBUFLEN",
+ [DLM_CVTUNGRANT] = "DLM_CVTUNGRANT",
+ [DLM_BADPARAM] = "DLM_BADPARAM",
+ [DLM_VALNOTVALID] = "DLM_VALNOTVALID",
+ [DLM_REJECTED] = "DLM_REJECTED",
+ [DLM_ABORT] = "DLM_ABORT",
+ [DLM_CANCEL] = "DLM_CANCEL",
+ [DLM_IVRESHANDLE] = "DLM_IVRESHANDLE",
+ [DLM_DEADLOCK] = "DLM_DEADLOCK",
+ [DLM_DENIED_NOASTS] = "DLM_DENIED_NOASTS",
+ [DLM_FORWARD] = "DLM_FORWARD",
+ [DLM_TIMEOUT] = "DLM_TIMEOUT",
+ [DLM_IVGROUPID] = "DLM_IVGROUPID",
+ [DLM_VERS_CONFLICT] = "DLM_VERS_CONFLICT",
+ [DLM_BAD_DEVICE_PATH] = "DLM_BAD_DEVICE_PATH",
+ [DLM_NO_DEVICE_PERMISSION] = "DLM_NO_DEVICE_PERMISSION",
+ [DLM_NO_CONTROL_DEVICE ] = "DLM_NO_CONTROL_DEVICE ",
+ [DLM_RECOVERING] = "DLM_RECOVERING",
+ [DLM_MIGRATING] = "DLM_MIGRATING",
+ [DLM_MAXSTATS] = "DLM_MAXSTATS",
+};
+
+static const char *dlm_errmsgs[] = {
+ [DLM_NORMAL] = "request in progress",
+ [DLM_GRANTED] = "request granted",
+ [DLM_DENIED] = "request denied",
+ [DLM_DENIED_NOLOCKS] = "request denied, out of system resources",
+ [DLM_WORKING] = "async request in progress",
+ [DLM_BLOCKED] = "lock request blocked",
+ [DLM_BLOCKED_ORPHAN] = "lock request blocked by a orphan lock",
+ [DLM_DENIED_GRACE_PERIOD] = "topological change in progress",
+ [DLM_SYSERR] = "system error",
+ [DLM_NOSUPPORT] = "unsupported",
+ [DLM_CANCELGRANT] = "can't cancel convert: already granted",
+ [DLM_IVLOCKID] = "bad lockid",
+ [DLM_SYNC] = "synchronous request granted",
+ [DLM_BADTYPE] = "bad resource type",
+ [DLM_BADRESOURCE] = "bad resource handle",
+ [DLM_MAXHANDLES] = "no more resource handles",
+ [DLM_NOCLINFO] = "can't contact cluster manager",
+ [DLM_NOLOCKMGR] = "can't contact lock manager",
+ [DLM_NOPURGED] = "can't contact purge daemon",
+ [DLM_BADARGS] = "bad api args",
+ [DLM_VOID] = "no status",
+ [DLM_NOTQUEUED] = "NOQUEUE was specified and request failed",
+ [DLM_IVBUFLEN] = "invalid resource name length",
+ [DLM_CVTUNGRANT] = "attempted to convert ungranted lock",
+ [DLM_BADPARAM] = "invalid lock mode specified",
+ [DLM_VALNOTVALID] = "value block has been invalidated",
+ [DLM_REJECTED] = "request rejected, unrecognized client",
+ [DLM_ABORT] = "blocked lock request cancelled",
+ [DLM_CANCEL] = "conversion request cancelled",
+ [DLM_IVRESHANDLE] = "invalid resource handle",
+ [DLM_DEADLOCK] = "deadlock recovery refused this request",
+ [DLM_DENIED_NOASTS] = "failed to allocate AST",
+ [DLM_FORWARD] = "request must wait for primary's response",
+ [DLM_TIMEOUT] = "timeout value for lock has expired",
+ [DLM_IVGROUPID] = "invalid group specification",
+ [DLM_VERS_CONFLICT] = "version conflicts prevent request handling",
+ [DLM_BAD_DEVICE_PATH] = "Locks device does not exist or path wrong",
+ [DLM_NO_DEVICE_PERMISSION] = "Client has insufficient perms for device",
+ [DLM_NO_CONTROL_DEVICE] = "Cannot set options on opened device ",
+ [DLM_RECOVERING] = "lock resource being recovered",
+ [DLM_MIGRATING] = "lock resource being migrated",
+ [DLM_MAXSTATS] = "invalid error number",
+};
+
+const char *dlm_errmsg(enum dlm_status err)
+{
+ if (err >= DLM_MAXSTATS || err < 0)
+ return dlm_errmsgs[DLM_MAXSTATS];
+ return dlm_errmsgs[err];
+}
+EXPORT_SYMBOL_GPL(dlm_errmsg);
+
+const char *dlm_errname(enum dlm_status err)
+{
+ if (err >= DLM_MAXSTATS || err < 0)
+ return dlm_errnames[DLM_MAXSTATS];
+ return dlm_errnames[err];
+}
+EXPORT_SYMBOL_GPL(dlm_errname);
+
+/* NOTE: This function converts a lockname into a string. It uses knowledge
+ * of the format of the lockname that should be outside the purview of the dlm.
+ * We are adding only to make dlm debugging slightly easier.
+ *
+ * For more on lockname formats, please refer to dlmglue.c and ocfs2_lockid.h.
+ */
+static int stringify_lockname(const char *lockname, int locklen, char *buf,
+ int len)
+{
+ int out = 0;
+ __be64 inode_blkno_be;
+
+#define OCFS2_DENTRY_LOCK_INO_START 18
+ if (*lockname == 'N') {
+ memcpy((__be64 *)&inode_blkno_be,
+ (char *)&lockname[OCFS2_DENTRY_LOCK_INO_START],
+ sizeof(__be64));
+ out += snprintf(buf + out, len - out, "%.*s%08x",
+ OCFS2_DENTRY_LOCK_INO_START - 1, lockname,
+ (unsigned int)be64_to_cpu(inode_blkno_be));
+ } else
+ out += snprintf(buf + out, len - out, "%.*s",
+ locklen, lockname);
+ return out;
+}
+
+static int stringify_nodemap(unsigned long *nodemap, int maxnodes,
+ char *buf, int len)
+{
+ int out = 0;
+ int i = -1;
+
+ while ((i = find_next_bit(nodemap, maxnodes, i + 1)) < maxnodes)
+ out += snprintf(buf + out, len - out, "%d ", i);
+
+ return out;
+}
+
+static int dump_mle(struct dlm_master_list_entry *mle, char *buf, int len)
+{
+ int out = 0;
+ char *mle_type;
+
+ if (mle->type == DLM_MLE_BLOCK)
+ mle_type = "BLK";
+ else if (mle->type == DLM_MLE_MASTER)
+ mle_type = "MAS";
+ else
+ mle_type = "MIG";
+
+ out += stringify_lockname(mle->mname, mle->mnamelen, buf + out, len - out);
+ out += snprintf(buf + out, len - out,
+ "\t%3s\tmas=%3u\tnew=%3u\tevt=%1d\tuse=%1d\tref=%3d\n",
+ mle_type, mle->master, mle->new_master,
+ !list_empty(&mle->hb_events),
+ !!mle->inuse,
+ atomic_read(&mle->mle_refs.refcount));
+
+ out += snprintf(buf + out, len - out, "Maybe=");
+ out += stringify_nodemap(mle->maybe_map, O2NM_MAX_NODES,
+ buf + out, len - out);
+ out += snprintf(buf + out, len - out, "\n");
+
+ out += snprintf(buf + out, len - out, "Vote=");
+ out += stringify_nodemap(mle->vote_map, O2NM_MAX_NODES,
+ buf + out, len - out);
+ out += snprintf(buf + out, len - out, "\n");
+
+ out += snprintf(buf + out, len - out, "Response=");
+ out += stringify_nodemap(mle->response_map, O2NM_MAX_NODES,
+ buf + out, len - out);
+ out += snprintf(buf + out, len - out, "\n");
+
+ out += snprintf(buf + out, len - out, "Node=");
+ out += stringify_nodemap(mle->node_map, O2NM_MAX_NODES,
+ buf + out, len - out);
+ out += snprintf(buf + out, len - out, "\n");
+
+ out += snprintf(buf + out, len - out, "\n");
+
+ return out;
+}
+
+void dlm_print_one_mle(struct dlm_master_list_entry *mle)
+{
+ char *buf;
+
+ buf = (char *) get_zeroed_page(GFP_NOFS);
+ if (buf) {
+ dump_mle(mle, buf, PAGE_SIZE - 1);
+ free_page((unsigned long)buf);
+ }
+}
+
+#ifdef CONFIG_DEBUG_FS
+
+static struct dentry *dlm_debugfs_root;
+
+#define DLM_DEBUGFS_DIR "o2dlm"
+#define DLM_DEBUGFS_DLM_STATE "dlm_state"
+#define DLM_DEBUGFS_LOCKING_STATE "locking_state"
+#define DLM_DEBUGFS_MLE_STATE "mle_state"
+#define DLM_DEBUGFS_PURGE_LIST "purge_list"
+
+/* begin - utils funcs */
+static void dlm_debug_free(struct kref *kref)
+{
+ struct dlm_debug_ctxt *dc;
+
+ dc = container_of(kref, struct dlm_debug_ctxt, debug_refcnt);
+
+ kfree(dc);
+}
+
+static void dlm_debug_put(struct dlm_debug_ctxt *dc)
+{
+ if (dc)
+ kref_put(&dc->debug_refcnt, dlm_debug_free);
+}
+
+static void dlm_debug_get(struct dlm_debug_ctxt *dc)
+{
+ kref_get(&dc->debug_refcnt);
+}
+
+static int debug_release(struct inode *inode, struct file *file)
+{
+ free_page((unsigned long)file->private_data);
+ return 0;
+}
+
+static ssize_t debug_read(struct file *file, char __user *buf,
+ size_t nbytes, loff_t *ppos)
+{
+ return simple_read_from_buffer(buf, nbytes, ppos, file->private_data,
+ i_size_read(file->f_mapping->host));
+}
+/* end - util funcs */
+
+/* begin - purge list funcs */
+static int debug_purgelist_print(struct dlm_ctxt *dlm, char *buf, int len)
+{
+ struct dlm_lock_resource *res;
+ int out = 0;
+ unsigned long total = 0;
+
+ out += snprintf(buf + out, len - out,
+ "Dumping Purgelist for Domain: %s\n", dlm->name);
+
+ spin_lock(&dlm->spinlock);
+ list_for_each_entry(res, &dlm->purge_list, purge) {
+ ++total;
+ if (len - out < 100)
+ continue;
+ spin_lock(&res->spinlock);
+ out += stringify_lockname(res->lockname.name,
+ res->lockname.len,
+ buf + out, len - out);
+ out += snprintf(buf + out, len - out, "\t%ld\n",
+ (jiffies - res->last_used)/HZ);
+ spin_unlock(&res->spinlock);
+ }
+ spin_unlock(&dlm->spinlock);
+
+ out += snprintf(buf + out, len - out, "Total on list: %lu\n", total);
+
+ return out;
+}
+
+static int debug_purgelist_open(struct inode *inode, struct file *file)
+{
+ struct dlm_ctxt *dlm = inode->i_private;
+ char *buf = NULL;
+
+ buf = (char *) get_zeroed_page(GFP_NOFS);
+ if (!buf)
+ goto bail;
+
+ i_size_write(inode, debug_purgelist_print(dlm, buf, PAGE_SIZE - 1));
+
+ file->private_data = buf;
+
+ return 0;
+bail:
+ return -ENOMEM;
+}
+
+static const struct file_operations debug_purgelist_fops = {
+ .open = debug_purgelist_open,
+ .release = debug_release,
+ .read = debug_read,
+ .llseek = generic_file_llseek,
+};
+/* end - purge list funcs */
+
+/* begin - debug mle funcs */
+static int debug_mle_print(struct dlm_ctxt *dlm, char *buf, int len)
+{
+ struct dlm_master_list_entry *mle;
+ struct hlist_head *bucket;
+ int i, out = 0;
+ unsigned long total = 0, longest = 0, bucket_count = 0;
+
+ out += snprintf(buf + out, len - out,
+ "Dumping MLEs for Domain: %s\n", dlm->name);
+
+ spin_lock(&dlm->master_lock);
+ for (i = 0; i < DLM_HASH_BUCKETS; i++) {
+ bucket = dlm_master_hash(dlm, i);
+ hlist_for_each_entry(mle, bucket, master_hash_node) {
+ ++total;
+ ++bucket_count;
+ if (len - out < 200)
+ continue;
+ out += dump_mle(mle, buf + out, len - out);
+ }
+ longest = max(longest, bucket_count);
+ bucket_count = 0;
+ }
+ spin_unlock(&dlm->master_lock);
+
+ out += snprintf(buf + out, len - out,
+ "Total: %lu, Longest: %lu\n", total, longest);
+ return out;
+}
+
+static int debug_mle_open(struct inode *inode, struct file *file)
+{
+ struct dlm_ctxt *dlm = inode->i_private;
+ char *buf = NULL;
+
+ buf = (char *) get_zeroed_page(GFP_NOFS);
+ if (!buf)
+ goto bail;
+
+ i_size_write(inode, debug_mle_print(dlm, buf, PAGE_SIZE - 1));
+
+ file->private_data = buf;
+
+ return 0;
+bail:
+ return -ENOMEM;
+}
+
+static const struct file_operations debug_mle_fops = {
+ .open = debug_mle_open,
+ .release = debug_release,
+ .read = debug_read,
+ .llseek = generic_file_llseek,
+};
+
+/* end - debug mle funcs */
+
+/* begin - debug lockres funcs */
+static int dump_lock(struct dlm_lock *lock, int list_type, char *buf, int len)
+{
+ int out;
+
+#define DEBUG_LOCK_VERSION 1
+ spin_lock(&lock->spinlock);
+ out = snprintf(buf, len, "LOCK:%d,%d,%d,%d,%d,%d:%lld,%d,%d,%d,%d,%d,"
+ "%d,%d,%d,%d\n",
+ DEBUG_LOCK_VERSION,
+ list_type, lock->ml.type, lock->ml.convert_type,
+ lock->ml.node,
+ dlm_get_lock_cookie_node(be64_to_cpu(lock->ml.cookie)),
+ dlm_get_lock_cookie_seq(be64_to_cpu(lock->ml.cookie)),
+ !list_empty(&lock->ast_list),
+ !list_empty(&lock->bast_list),
+ lock->ast_pending, lock->bast_pending,
+ lock->convert_pending, lock->lock_pending,
+ lock->cancel_pending, lock->unlock_pending,
+ atomic_read(&lock->lock_refs.refcount));
+ spin_unlock(&lock->spinlock);
+
+ return out;
+}
+
+static int dump_lockres(struct dlm_lock_resource *res, char *buf, int len)
+{
+ struct dlm_lock *lock;
+ int i;
+ int out = 0;
+
+ out += snprintf(buf + out, len - out, "NAME:");
+ out += stringify_lockname(res->lockname.name, res->lockname.len,
+ buf + out, len - out);
+ out += snprintf(buf + out, len - out, "\n");
+
+#define DEBUG_LRES_VERSION 1
+ out += snprintf(buf + out, len - out,
+ "LRES:%d,%d,%d,%ld,%d,%d,%d,%d,%d,%d,%d\n",
+ DEBUG_LRES_VERSION,
+ res->owner, res->state, res->last_used,
+ !list_empty(&res->purge),
+ !list_empty(&res->dirty),
+ !list_empty(&res->recovering),
+ res->inflight_locks, res->migration_pending,
+ atomic_read(&res->asts_reserved),
+ atomic_read(&res->refs.refcount));
+
+ /* refmap */
+ out += snprintf(buf + out, len - out, "RMAP:");
+ out += stringify_nodemap(res->refmap, O2NM_MAX_NODES,
+ buf + out, len - out);
+ out += snprintf(buf + out, len - out, "\n");
+
+ /* lvb */
+ out += snprintf(buf + out, len - out, "LVBX:");
+ for (i = 0; i < DLM_LVB_LEN; i++)
+ out += snprintf(buf + out, len - out,
+ "%02x", (unsigned char)res->lvb[i]);
+ out += snprintf(buf + out, len - out, "\n");
+
+ /* granted */
+ list_for_each_entry(lock, &res->granted, list)
+ out += dump_lock(lock, 0, buf + out, len - out);
+
+ /* converting */
+ list_for_each_entry(lock, &res->converting, list)
+ out += dump_lock(lock, 1, buf + out, len - out);
+
+ /* blocked */
+ list_for_each_entry(lock, &res->blocked, list)
+ out += dump_lock(lock, 2, buf + out, len - out);
+
+ out += snprintf(buf + out, len - out, "\n");
+
+ return out;
+}
+
+static void *lockres_seq_start(struct seq_file *m, loff_t *pos)
+{
+ struct debug_lockres *dl = m->private;
+ struct dlm_ctxt *dlm = dl->dl_ctxt;
+ struct dlm_lock_resource *oldres = dl->dl_res;
+ struct dlm_lock_resource *res = NULL;
+ struct list_head *track_list;
+
+ spin_lock(&dlm->track_lock);
+ if (oldres)
+ track_list = &oldres->tracking;
+ else {
+ track_list = &dlm->tracking_list;
+ if (list_empty(track_list)) {
+ dl = NULL;
+ spin_unlock(&dlm->track_lock);
+ goto bail;
+ }
+ }
+
+ list_for_each_entry(res, track_list, tracking) {
+ if (&res->tracking == &dlm->tracking_list)
+ res = NULL;
+ else
+ dlm_lockres_get(res);
+ break;
+ }
+ spin_unlock(&dlm->track_lock);
+
+ if (oldres)
+ dlm_lockres_put(oldres);
+
+ dl->dl_res = res;
+
+ if (res) {
+ spin_lock(&res->spinlock);
+ dump_lockres(res, dl->dl_buf, dl->dl_len - 1);
+ spin_unlock(&res->spinlock);
+ } else
+ dl = NULL;
+
+bail:
+ /* passed to seq_show */
+ return dl;
+}
+
+static void lockres_seq_stop(struct seq_file *m, void *v)
+{
+}
+
+static void *lockres_seq_next(struct seq_file *m, void *v, loff_t *pos)
+{
+ return NULL;
+}
+
+static int lockres_seq_show(struct seq_file *s, void *v)
+{
+ struct debug_lockres *dl = (struct debug_lockres *)v;
+
+ seq_printf(s, "%s", dl->dl_buf);
+
+ return 0;
+}
+
+static const struct seq_operations debug_lockres_ops = {
+ .start = lockres_seq_start,
+ .stop = lockres_seq_stop,
+ .next = lockres_seq_next,
+ .show = lockres_seq_show,
+};
+
+static int debug_lockres_open(struct inode *inode, struct file *file)
+{
+ struct dlm_ctxt *dlm = inode->i_private;
+ struct debug_lockres *dl;
+ void *buf;
+
+ buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
+ if (!buf)
+ goto bail;
+
+ dl = __seq_open_private(file, &debug_lockres_ops, sizeof(*dl));
+ if (!dl)
+ goto bailfree;
+
+ dl->dl_len = PAGE_SIZE;
+ dl->dl_buf = buf;
+
+ dlm_grab(dlm);
+ dl->dl_ctxt = dlm;
+
+ return 0;
+
+bailfree:
+ kfree(buf);
+bail:
+ mlog_errno(-ENOMEM);
+ return -ENOMEM;
+}
+
+static int debug_lockres_release(struct inode *inode, struct file *file)
+{
+ struct seq_file *seq = file->private_data;
+ struct debug_lockres *dl = (struct debug_lockres *)seq->private;
+
+ if (dl->dl_res)
+ dlm_lockres_put(dl->dl_res);
+ dlm_put(dl->dl_ctxt);
+ kfree(dl->dl_buf);
+ return seq_release_private(inode, file);
+}
+
+static const struct file_operations debug_lockres_fops = {
+ .open = debug_lockres_open,
+ .release = debug_lockres_release,
+ .read = seq_read,
+ .llseek = seq_lseek,
+};
+/* end - debug lockres funcs */
+
+/* begin - debug state funcs */
+static int debug_state_print(struct dlm_ctxt *dlm, char *buf, int len)
+{
+ int out = 0;
+ struct dlm_reco_node_data *node;
+ char *state;
+ int cur_mles = 0, tot_mles = 0;
+ int i;
+
+ spin_lock(&dlm->spinlock);
+
+ switch (dlm->dlm_state) {
+ case DLM_CTXT_NEW:
+ state = "NEW"; break;
+ case DLM_CTXT_JOINED:
+ state = "JOINED"; break;
+ case DLM_CTXT_IN_SHUTDOWN:
+ state = "SHUTDOWN"; break;
+ case DLM_CTXT_LEAVING:
+ state = "LEAVING"; break;
+ default:
+ state = "UNKNOWN"; break;
+ }
+
+ /* Domain: xxxxxxxxxx Key: 0xdfbac769 */
+ out += snprintf(buf + out, len - out,
+ "Domain: %s Key: 0x%08x Protocol: %d.%d\n",
+ dlm->name, dlm->key, dlm->dlm_locking_proto.pv_major,
+ dlm->dlm_locking_proto.pv_minor);
+
+ /* Thread Pid: xxx Node: xxx State: xxxxx */
+ out += snprintf(buf + out, len - out,
+ "Thread Pid: %d Node: %d State: %s\n",
+ task_pid_nr(dlm->dlm_thread_task), dlm->node_num, state);
+
+ /* Number of Joins: xxx Joining Node: xxx */
+ out += snprintf(buf + out, len - out,
+ "Number of Joins: %d Joining Node: %d\n",
+ dlm->num_joins, dlm->joining_node);
+
+ /* Domain Map: xx xx xx */
+ out += snprintf(buf + out, len - out, "Domain Map: ");
+ out += stringify_nodemap(dlm->domain_map, O2NM_MAX_NODES,
+ buf + out, len - out);
+ out += snprintf(buf + out, len - out, "\n");
+
+ /* Exit Domain Map: xx xx xx */
+ out += snprintf(buf + out, len - out, "Exit Domain Map: ");
+ out += stringify_nodemap(dlm->exit_domain_map, O2NM_MAX_NODES,
+ buf + out, len - out);
+ out += snprintf(buf + out, len - out, "\n");
+
+ /* Live Map: xx xx xx */
+ out += snprintf(buf + out, len - out, "Live Map: ");
+ out += stringify_nodemap(dlm->live_nodes_map, O2NM_MAX_NODES,
+ buf + out, len - out);
+ out += snprintf(buf + out, len - out, "\n");
+
+ /* Lock Resources: xxx (xxx) */
+ out += snprintf(buf + out, len - out,
+ "Lock Resources: %d (%d)\n",
+ atomic_read(&dlm->res_cur_count),
+ atomic_read(&dlm->res_tot_count));
+
+ for (i = 0; i < DLM_MLE_NUM_TYPES; ++i)
+ tot_mles += atomic_read(&dlm->mle_tot_count[i]);
+
+ for (i = 0; i < DLM_MLE_NUM_TYPES; ++i)
+ cur_mles += atomic_read(&dlm->mle_cur_count[i]);
+
+ /* MLEs: xxx (xxx) */
+ out += snprintf(buf + out, len - out,
+ "MLEs: %d (%d)\n", cur_mles, tot_mles);
+
+ /* Blocking: xxx (xxx) */
+ out += snprintf(buf + out, len - out,
+ " Blocking: %d (%d)\n",
+ atomic_read(&dlm->mle_cur_count[DLM_MLE_BLOCK]),
+ atomic_read(&dlm->mle_tot_count[DLM_MLE_BLOCK]));
+
+ /* Mastery: xxx (xxx) */
+ out += snprintf(buf + out, len - out,
+ " Mastery: %d (%d)\n",
+ atomic_read(&dlm->mle_cur_count[DLM_MLE_MASTER]),
+ atomic_read(&dlm->mle_tot_count[DLM_MLE_MASTER]));
+
+ /* Migration: xxx (xxx) */
+ out += snprintf(buf + out, len - out,
+ " Migration: %d (%d)\n",
+ atomic_read(&dlm->mle_cur_count[DLM_MLE_MIGRATION]),
+ atomic_read(&dlm->mle_tot_count[DLM_MLE_MIGRATION]));
+
+ /* Lists: Dirty=Empty Purge=InUse PendingASTs=Empty ... */
+ out += snprintf(buf + out, len - out,
+ "Lists: Dirty=%s Purge=%s PendingASTs=%s "
+ "PendingBASTs=%s\n",
+ (list_empty(&dlm->dirty_list) ? "Empty" : "InUse"),
+ (list_empty(&dlm->purge_list) ? "Empty" : "InUse"),
+ (list_empty(&dlm->pending_asts) ? "Empty" : "InUse"),
+ (list_empty(&dlm->pending_basts) ? "Empty" : "InUse"));
+
+ /* Purge Count: xxx Refs: xxx */
+ out += snprintf(buf + out, len - out,
+ "Purge Count: %d Refs: %d\n", dlm->purge_count,
+ atomic_read(&dlm->dlm_refs.refcount));
+
+ /* Dead Node: xxx */
+ out += snprintf(buf + out, len - out,
+ "Dead Node: %d\n", dlm->reco.dead_node);
+
+ /* What about DLM_RECO_STATE_FINALIZE? */
+ if (dlm->reco.state == DLM_RECO_STATE_ACTIVE)
+ state = "ACTIVE";
+ else
+ state = "INACTIVE";
+
+ /* Recovery Pid: xxxx Master: xxx State: xxxx */
+ out += snprintf(buf + out, len - out,
+ "Recovery Pid: %d Master: %d State: %s\n",
+ task_pid_nr(dlm->dlm_reco_thread_task),
+ dlm->reco.new_master, state);
+
+ /* Recovery Map: xx xx */
+ out += snprintf(buf + out, len - out, "Recovery Map: ");
+ out += stringify_nodemap(dlm->recovery_map, O2NM_MAX_NODES,
+ buf + out, len - out);
+ out += snprintf(buf + out, len - out, "\n");
+
+ /* Recovery Node State: */
+ out += snprintf(buf + out, len - out, "Recovery Node State:\n");
+ list_for_each_entry(node, &dlm->reco.node_data, list) {
+ switch (node->state) {
+ case DLM_RECO_NODE_DATA_INIT:
+ state = "INIT";
+ break;
+ case DLM_RECO_NODE_DATA_REQUESTING:
+ state = "REQUESTING";
+ break;
+ case DLM_RECO_NODE_DATA_DEAD:
+ state = "DEAD";
+ break;
+ case DLM_RECO_NODE_DATA_RECEIVING:
+ state = "RECEIVING";
+ break;
+ case DLM_RECO_NODE_DATA_REQUESTED:
+ state = "REQUESTED";
+ break;
+ case DLM_RECO_NODE_DATA_DONE:
+ state = "DONE";
+ break;
+ case DLM_RECO_NODE_DATA_FINALIZE_SENT:
+ state = "FINALIZE-SENT";
+ break;
+ default:
+ state = "BAD";
+ break;
+ }
+ out += snprintf(buf + out, len - out, "\t%u - %s\n",
+ node->node_num, state);
+ }
+
+ spin_unlock(&dlm->spinlock);
+
+ return out;
+}
+
+static int debug_state_open(struct inode *inode, struct file *file)
+{
+ struct dlm_ctxt *dlm = inode->i_private;
+ char *buf = NULL;
+
+ buf = (char *) get_zeroed_page(GFP_NOFS);
+ if (!buf)
+ goto bail;
+
+ i_size_write(inode, debug_state_print(dlm, buf, PAGE_SIZE - 1));
+
+ file->private_data = buf;
+
+ return 0;
+bail:
+ return -ENOMEM;
+}
+
+static const struct file_operations debug_state_fops = {
+ .open = debug_state_open,
+ .release = debug_release,
+ .read = debug_read,
+ .llseek = generic_file_llseek,
+};
+/* end - debug state funcs */
+
+/* files in subroot */
+int dlm_debug_init(struct dlm_ctxt *dlm)
+{
+ struct dlm_debug_ctxt *dc = dlm->dlm_debug_ctxt;
+
+ /* for dumping dlm_ctxt */
+ dc->debug_state_dentry = debugfs_create_file(DLM_DEBUGFS_DLM_STATE,
+ S_IFREG|S_IRUSR,
+ dlm->dlm_debugfs_subroot,
+ dlm, &debug_state_fops);
+ if (!dc->debug_state_dentry) {
+ mlog_errno(-ENOMEM);
+ goto bail;
+ }
+
+ /* for dumping lockres */
+ dc->debug_lockres_dentry =
+ debugfs_create_file(DLM_DEBUGFS_LOCKING_STATE,
+ S_IFREG|S_IRUSR,
+ dlm->dlm_debugfs_subroot,
+ dlm, &debug_lockres_fops);
+ if (!dc->debug_lockres_dentry) {
+ mlog_errno(-ENOMEM);
+ goto bail;
+ }
+
+ /* for dumping mles */
+ dc->debug_mle_dentry = debugfs_create_file(DLM_DEBUGFS_MLE_STATE,
+ S_IFREG|S_IRUSR,
+ dlm->dlm_debugfs_subroot,
+ dlm, &debug_mle_fops);
+ if (!dc->debug_mle_dentry) {
+ mlog_errno(-ENOMEM);
+ goto bail;
+ }
+
+ /* for dumping lockres on the purge list */
+ dc->debug_purgelist_dentry =
+ debugfs_create_file(DLM_DEBUGFS_PURGE_LIST,
+ S_IFREG|S_IRUSR,
+ dlm->dlm_debugfs_subroot,
+ dlm, &debug_purgelist_fops);
+ if (!dc->debug_purgelist_dentry) {
+ mlog_errno(-ENOMEM);
+ goto bail;
+ }
+
+ dlm_debug_get(dc);
+ return 0;
+
+bail:
+ dlm_debug_shutdown(dlm);
+ return -ENOMEM;
+}
+
+void dlm_debug_shutdown(struct dlm_ctxt *dlm)
+{
+ struct dlm_debug_ctxt *dc = dlm->dlm_debug_ctxt;
+
+ if (dc) {
+ debugfs_remove(dc->debug_purgelist_dentry);
+ debugfs_remove(dc->debug_mle_dentry);
+ debugfs_remove(dc->debug_lockres_dentry);
+ debugfs_remove(dc->debug_state_dentry);
+ dlm_debug_put(dc);
+ }
+}
+
+/* subroot - domain dir */
+int dlm_create_debugfs_subroot(struct dlm_ctxt *dlm)
+{
+ dlm->dlm_debugfs_subroot = debugfs_create_dir(dlm->name,
+ dlm_debugfs_root);
+ if (!dlm->dlm_debugfs_subroot) {
+ mlog_errno(-ENOMEM);
+ goto bail;
+ }
+
+ dlm->dlm_debug_ctxt = kzalloc(sizeof(struct dlm_debug_ctxt),
+ GFP_KERNEL);
+ if (!dlm->dlm_debug_ctxt) {
+ mlog_errno(-ENOMEM);
+ goto bail;
+ }
+ kref_init(&dlm->dlm_debug_ctxt->debug_refcnt);
+
+ return 0;
+bail:
+ dlm_destroy_debugfs_subroot(dlm);
+ return -ENOMEM;
+}
+
+void dlm_destroy_debugfs_subroot(struct dlm_ctxt *dlm)
+{
+ debugfs_remove(dlm->dlm_debugfs_subroot);
+}
+
+/* debugfs root */
+int dlm_create_debugfs_root(void)
+{
+ dlm_debugfs_root = debugfs_create_dir(DLM_DEBUGFS_DIR, NULL);
+ if (!dlm_debugfs_root) {
+ mlog_errno(-ENOMEM);
+ return -ENOMEM;
+ }
+ return 0;
+}
+
+void dlm_destroy_debugfs_root(void)
+{
+ debugfs_remove(dlm_debugfs_root);
+}
+#endif /* CONFIG_DEBUG_FS */
Code Review / kvmfornfv.git / blobdiff