diff options
Diffstat (limited to 'ANDROID_3.4.5/fs/ocfs2/dlm/dlmdebug.c')
| -rw-r--r-- | ANDROID_3.4.5/fs/ocfs2/dlm/dlmdebug.c | 1018 |
1 files changed, 0 insertions, 1018 deletions
diff --git a/ANDROID_3.4.5/fs/ocfs2/dlm/dlmdebug.c b/ANDROID_3.4.5/fs/ocfs2/dlm/dlmdebug.c deleted file mode 100644 index 0e28e242..00000000 --- a/ANDROID_3.4.5/fs/ocfs2/dlm/dlmdebug.c +++ /dev/null @@ -1,1018 +0,0 @@ -/* -*- 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 list_head *iter2; - 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(iter2, &res->granted) { - lock = list_entry(iter2, struct dlm_lock, list); - __dlm_print_lock(lock); - } - printk(" converting queue:\n"); - list_for_each(iter2, &res->converting) { - lock = list_entry(iter2, struct dlm_lock, list); - __dlm_print_lock(lock); - } - printk(" blocked queue:\n"); - list_for_each(iter2, &res->blocked) { - lock = list_entry(iter2, struct dlm_lock, 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 = NULL; - -#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: %ld\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; - struct hlist_node *list; - 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(list, bucket) { - mle = hlist_entry(list, struct dlm_master_list_entry, - 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: %ld, Longest: %ld\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; - 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 = 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 = 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 */ |