| /* -*- mode: c; c-basic-offset: 8; -*- |
| * vim: noexpandtab sw=8 ts=8 sts=0: |
| * |
| * dlmdebug.c |
| * |
| * debug functionality for the dlm |
| * |
| * Copyright (C) 2004 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/utsname.h> |
| #include <linux/sysctl.h> |
| #include <linux/spinlock.h> |
| #include <linux/debugfs.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" |
| |
| void dlm_print_one_lock_resource(struct dlm_lock_resource *res) |
| { |
| mlog(ML_NOTICE, "lockres: %.*s, owner=%u, state=%u\n", |
| res->lockname.len, res->lockname.name, |
| res->owner, res->state); |
| 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); |
| |
| mlog(ML_NOTICE, " 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); |
| } |
| |
| void __dlm_print_one_lock_resource(struct dlm_lock_resource *res) |
| { |
| struct list_head *iter2; |
| struct dlm_lock *lock; |
| |
| assert_spin_locked(&res->spinlock); |
| |
| mlog(ML_NOTICE, "lockres: %.*s, owner=%u, state=%u\n", |
| res->lockname.len, res->lockname.name, |
| res->owner, res->state); |
| mlog(ML_NOTICE, " last used: %lu, on purge list: %s\n", |
| res->last_used, list_empty(&res->purge) ? "no" : "yes"); |
| dlm_print_lockres_refmap(res); |
| mlog(ML_NOTICE, " granted queue: \n"); |
| list_for_each(iter2, &res->granted) { |
| lock = list_entry(iter2, struct dlm_lock, list); |
| spin_lock(&lock->spinlock); |
| mlog(ML_NOTICE, " type=%d, conv=%d, node=%u, " |
| "cookie=%u:%llu, ast=(empty=%c,pend=%c), bast=(empty=%c,pend=%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)), |
| list_empty(&lock->ast_list) ? 'y' : 'n', |
| lock->ast_pending ? 'y' : 'n', |
| list_empty(&lock->bast_list) ? 'y' : 'n', |
| lock->bast_pending ? 'y' : 'n'); |
| spin_unlock(&lock->spinlock); |
| } |
| mlog(ML_NOTICE, " converting queue: \n"); |
| list_for_each(iter2, &res->converting) { |
| lock = list_entry(iter2, struct dlm_lock, list); |
| spin_lock(&lock->spinlock); |
| mlog(ML_NOTICE, " type=%d, conv=%d, node=%u, " |
| "cookie=%u:%llu, ast=(empty=%c,pend=%c), bast=(empty=%c,pend=%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)), |
| list_empty(&lock->ast_list) ? 'y' : 'n', |
| lock->ast_pending ? 'y' : 'n', |
| list_empty(&lock->bast_list) ? 'y' : 'n', |
| lock->bast_pending ? 'y' : 'n'); |
| spin_unlock(&lock->spinlock); |
| } |
| mlog(ML_NOTICE, " blocked queue: \n"); |
| list_for_each(iter2, &res->blocked) { |
| lock = list_entry(iter2, struct dlm_lock, list); |
| spin_lock(&lock->spinlock); |
| mlog(ML_NOTICE, " type=%d, conv=%d, node=%u, " |
| "cookie=%u:%llu, ast=(empty=%c,pend=%c), bast=(empty=%c,pend=%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)), |
| list_empty(&lock->ast_list) ? 'y' : 'n', |
| lock->ast_pending ? 'y' : 'n', |
| list_empty(&lock->bast_list) ? 'y' : 'n', |
| lock->bast_pending ? 'y' : 'n'); |
| spin_unlock(&lock->spinlock); |
| } |
| } |
| |
| void dlm_print_one_lock(struct dlm_lock *lockid) |
| { |
| dlm_print_one_lock_resource(lockid->lockres); |
| } |
| EXPORT_SYMBOL_GPL(dlm_print_one_lock); |
| |
| #if 0 |
| void dlm_dump_lock_resources(struct dlm_ctxt *dlm) |
| { |
| struct dlm_lock_resource *res; |
| struct hlist_node *iter; |
| struct hlist_head *bucket; |
| int i; |
| |
| mlog(ML_NOTICE, "struct dlm_ctxt: %s, node=%u, key=%u\n", |
| dlm->name, dlm->node_num, dlm->key); |
| if (!dlm || !dlm->name) { |
| mlog(ML_ERROR, "dlm=%p\n", dlm); |
| return; |
| } |
| |
| spin_lock(&dlm->spinlock); |
| for (i=0; i<DLM_HASH_BUCKETS; i++) { |
| bucket = dlm_lockres_hash(dlm, i); |
| hlist_for_each_entry(res, iter, bucket, hash_node) |
| dlm_print_one_lock_resource(res); |
| } |
| spin_unlock(&dlm->spinlock); |
| } |
| #endif /* 0 */ |
| |
| 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); |
| |
| |
| #ifdef CONFIG_DEBUG_FS |
| |
| static struct dentry *dlm_debugfs_root = NULL; |
| |
| /* 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; |
| } |
| |
| #define DLM_DEBUGFS_DIR "o2dlm" |
| #define DLM_DEBUGFS_DLM_STATE "dlm_state" |
| #define DLM_DEBUGFS_LOCKING_STATE "locking_state" |
| |
| /* 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); |
| } |
| |
| 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 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 struct debug_buffer *debug_buffer_allocate(void) |
| { |
| struct debug_buffer *db = NULL; |
| |
| db = kzalloc(sizeof(struct debug_buffer), GFP_KERNEL); |
| if (!db) |
| goto bail; |
| |
| db->len = PAGE_SIZE; |
| db->buf = kmalloc(db->len, GFP_KERNEL); |
| if (!db->buf) |
| goto bail; |
| |
| return db; |
| bail: |
| kfree(db); |
| return NULL; |
| } |
| |
| static ssize_t debug_buffer_read(struct file *file, char __user *buf, |
| size_t nbytes, loff_t *ppos) |
| { |
| struct debug_buffer *db = file->private_data; |
| |
| return simple_read_from_buffer(buf, nbytes, ppos, db->buf, db->len); |
| } |
| |
| static loff_t debug_buffer_llseek(struct file *file, loff_t off, int whence) |
| { |
| struct debug_buffer *db = file->private_data; |
| loff_t new = -1; |
| |
| switch (whence) { |
| case 0: |
| new = off; |
| break; |
| case 1: |
| new = file->f_pos + off; |
| break; |
| } |
| |
| if (new < 0 || new > db->len) |
| return -EINVAL; |
| |
| return (file->f_pos = new); |
| } |
| |
| static int debug_buffer_release(struct inode *inode, struct file *file) |
| { |
| struct debug_buffer *db = (struct debug_buffer *)file->private_data; |
| |
| if (db) |
| kfree(db->buf); |
| kfree(db); |
| |
| return 0; |
| } |
| /* end - util 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 *res = NULL; |
| |
| spin_lock(&dlm->spinlock); |
| |
| if (dl->dl_res) { |
| list_for_each_entry(res, &dl->dl_res->tracking, tracking) { |
| if (dl->dl_res) { |
| dlm_lockres_put(dl->dl_res); |
| dl->dl_res = NULL; |
| } |
| if (&res->tracking == &dlm->tracking_list) { |
| mlog(0, "End of list found, %p\n", res); |
| dl = NULL; |
| break; |
| } |
| dlm_lockres_get(res); |
| dl->dl_res = res; |
| break; |
| } |
| } else { |
| if (!list_empty(&dlm->tracking_list)) { |
| list_for_each_entry(res, &dlm->tracking_list, tracking) |
| break; |
| dlm_lockres_get(res); |
| dl->dl_res = res; |
| } else |
| dl = NULL; |
| } |
| |
| if (dl) { |
| spin_lock(&dl->dl_res->spinlock); |
| dump_lockres(dl->dl_res, dl->dl_buf, dl->dl_len - 1); |
| spin_unlock(&dl->dl_res->spinlock); |
| } |
| |
| spin_unlock(&dlm->spinlock); |
| |
| 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 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; |
| int ret = -ENOMEM; |
| struct seq_file *seq; |
| struct debug_lockres *dl = NULL; |
| |
| dl = kzalloc(sizeof(struct debug_lockres), GFP_KERNEL); |
| if (!dl) { |
| mlog_errno(ret); |
| goto bail; |
| } |
| |
| dl->dl_len = PAGE_SIZE; |
| dl->dl_buf = kmalloc(dl->dl_len, GFP_KERNEL); |
| if (!dl->dl_buf) { |
| mlog_errno(ret); |
| goto bail; |
| } |
| |
| ret = seq_open(file, &debug_lockres_ops); |
| if (ret) { |
| mlog_errno(ret); |
| goto bail; |
| } |
| |
| seq = (struct seq_file *) file->private_data; |
| seq->private = dl; |
| |
| dlm_grab(dlm); |
| dl->dl_ctxt = dlm; |
| |
| return 0; |
| bail: |
| if (dl) |
| kfree(dl->dl_buf); |
| kfree(dl); |
| return ret; |
| } |
| |
| static int debug_lockres_release(struct inode *inode, struct file *file) |
| { |
| struct seq_file *seq = (struct seq_file *)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 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, struct debug_buffer *db) |
| { |
| int out = 0; |
| struct dlm_reco_node_data *node; |
| char *state; |
| int lres, rres, ures, tres; |
| |
| lres = atomic_read(&dlm->local_resources); |
| rres = atomic_read(&dlm->remote_resources); |
| ures = atomic_read(&dlm->unknown_resources); |
| tres = lres + rres + ures; |
| |
| 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(db->buf + out, db->len - out, |
| "Domain: %s Key: 0x%08x\n", dlm->name, dlm->key); |
| |
| /* Thread Pid: xxx Node: xxx State: xxxxx */ |
| out += snprintf(db->buf + out, db->len - out, |
| "Thread Pid: %d Node: %d State: %s\n", |
| dlm->dlm_thread_task->pid, dlm->node_num, state); |
| |
| /* Number of Joins: xxx Joining Node: xxx */ |
| out += snprintf(db->buf + out, db->len - out, |
| "Number of Joins: %d Joining Node: %d\n", |
| dlm->num_joins, dlm->joining_node); |
| |
| /* Domain Map: xx xx xx */ |
| out += snprintf(db->buf + out, db->len - out, "Domain Map: "); |
| out += stringify_nodemap(dlm->domain_map, O2NM_MAX_NODES, |
| db->buf + out, db->len - out); |
| out += snprintf(db->buf + out, db->len - out, "\n"); |
| |
| /* Live Map: xx xx xx */ |
| out += snprintf(db->buf + out, db->len - out, "Live Map: "); |
| out += stringify_nodemap(dlm->live_nodes_map, O2NM_MAX_NODES, |
| db->buf + out, db->len - out); |
| out += snprintf(db->buf + out, db->len - out, "\n"); |
| |
| /* Mastered Resources Total: xxx Locally: xxx Remotely: ... */ |
| out += snprintf(db->buf + out, db->len - out, |
| "Mastered Resources Total: %d Locally: %d " |
| "Remotely: %d Unknown: %d\n", |
| tres, lres, rres, ures); |
| |
| /* Lists: Dirty=Empty Purge=InUse PendingASTs=Empty ... */ |
| out += snprintf(db->buf + out, db->len - out, |
| "Lists: Dirty=%s Purge=%s PendingASTs=%s " |
| "PendingBASTs=%s Master=%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"), |
| (list_empty(&dlm->master_list) ? "Empty" : "InUse")); |
| |
| /* Purge Count: xxx Refs: xxx */ |
| out += snprintf(db->buf + out, db->len - out, |
| "Purge Count: %d Refs: %d\n", dlm->purge_count, |
| atomic_read(&dlm->dlm_refs.refcount)); |
| |
| /* Dead Node: xxx */ |
| out += snprintf(db->buf + out, db->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(db->buf + out, db->len - out, |
| "Recovery Pid: %d Master: %d State: %s\n", |
| dlm->dlm_reco_thread_task->pid, |
| dlm->reco.new_master, state); |
| |
| /* Recovery Map: xx xx */ |
| out += snprintf(db->buf + out, db->len - out, "Recovery Map: "); |
| out += stringify_nodemap(dlm->recovery_map, O2NM_MAX_NODES, |
| db->buf + out, db->len - out); |
| out += snprintf(db->buf + out, db->len - out, "\n"); |
| |
| /* Recovery Node State: */ |
| out += snprintf(db->buf + out, db->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(db->buf + out, db->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; |
| struct debug_buffer *db = NULL; |
| |
| db = debug_buffer_allocate(); |
| if (!db) |
| goto bail; |
| |
| db->len = debug_state_print(dlm, db); |
| |
| file->private_data = db; |
| |
| return 0; |
| bail: |
| return -ENOMEM; |
| } |
| |
| static struct file_operations debug_state_fops = { |
| .open = debug_state_open, |
| .release = debug_buffer_release, |
| .read = debug_buffer_read, |
| .llseek = debug_buffer_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; |
| } |
| |
| 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) { |
| if (dc->debug_lockres_dentry) |
| debugfs_remove(dc->debug_lockres_dentry); |
| if (dc->debug_state_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) |
| { |
| if (dlm->dlm_debugfs_subroot) |
| 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) |
| { |
| if (dlm_debugfs_root) |
| debugfs_remove(dlm_debugfs_root); |
| } |
| #endif /* CONFIG_DEBUG_FS */ |