symlink.o \
sysfile.o \
uptodate.o \
- ver.o \
- vote.o
+ ver.o
obj-$(CONFIG_OCFS2_FS) += cluster/
obj-$(CONFIG_OCFS2_FS) += dlm/
* locking semantics of the file system using the protocol. It should
* be somewhere else, I'm sure, but right now it isn't.
*
+ * New in version 9:
+ * - All votes removed
+ *
* New in version 8:
* - Replace delete inode votes with a cluster lock
*
* - full 64 bit i_size in the metadata lock lvbs
* - introduction of "rw" lock and pushing meta/data locking down
*/
-#define O2NET_PROTOCOL_VERSION 8ULL
+#define O2NET_PROTOCOL_VERSION 9ULL
struct o2net_handshake {
__be64 protocol_version;
__be64 connector_id;
/*
* Walk the inode alias list, and find a dentry which has a given
* parent. ocfs2_dentry_attach_lock() wants to find _any_ alias as it
- * is looking for a dentry_lock reference. The vote thread is looking
- * to unhash aliases, so we allow it to skip any that already have
- * that property.
+ * is looking for a dentry_lock reference. The downconvert thread is
+ * looking to unhash aliases, so we allow it to skip any that already
+ * have that property.
*/
struct dentry *ocfs2_find_local_alias(struct inode *inode,
u64 parent_blkno,
dl->dl_count = 0;
/*
* Does this have to happen below, for all attaches, in case
- * the struct inode gets blown away by votes?
+ * the struct inode gets blown away by the downconvert thread?
*/
dl->dl_inode = igrab(inode);
dl->dl_parent_blkno = parent_blkno;
#include "slot_map.h"
#include "super.h"
#include "uptodate.h"
-#include "vote.h"
#include "buffer_head_io.h"
struct ocfs2_super * (*get_osb)(struct ocfs2_lock_res *);
/*
- * Optionally called in the downconvert (or "vote") thread
- * after a successful downconvert. The lockres will not be
- * referenced after this callback is called, so it is safe to
- * free memory, etc.
+ * Optionally called in the downconvert thread after a
+ * successful downconvert. The lockres will not be referenced
+ * after this callback is called, so it is safe to free
+ * memory, etc.
*
* The exact semantics of when this is called are controlled
* by ->downconvert_worker()
"resource %s: %s\n", dlm_errname(_stat), _func, \
_lockres->l_name, dlm_errmsg(_stat)); \
} while (0)
-static void ocfs2_vote_on_unlock(struct ocfs2_super *osb,
- struct ocfs2_lock_res *lockres);
+static int ocfs2_downconvert_thread(void *arg);
+static void ocfs2_downconvert_on_unlock(struct ocfs2_super *osb,
+ struct ocfs2_lock_res *lockres);
static int ocfs2_meta_lock_update(struct inode *inode,
struct buffer_head **bh);
static void ocfs2_drop_osb_locks(struct ocfs2_super *osb);
wake_up(&lockres->l_event);
- ocfs2_kick_vote_thread(osb);
+ ocfs2_wake_downconvert_thread(osb);
}
static void ocfs2_locking_ast(void *opaque)
mlog_entry_void();
spin_lock_irqsave(&lockres->l_lock, flags);
ocfs2_dec_holders(lockres, level);
- ocfs2_vote_on_unlock(osb, lockres);
+ ocfs2_downconvert_on_unlock(osb, lockres);
spin_unlock_irqrestore(&lockres->l_lock, flags);
mlog_exit_void();
}
return ret;
}
-static void ocfs2_vote_on_unlock(struct ocfs2_super *osb,
- struct ocfs2_lock_res *lockres)
+static void ocfs2_downconvert_on_unlock(struct ocfs2_super *osb,
+ struct ocfs2_lock_res *lockres)
{
int kick = 0;
mlog_entry_void();
/* If we know that another node is waiting on our lock, kick
- * the vote thread * pre-emptively when we reach a release
+ * the downconvert thread * pre-emptively when we reach a release
* condition. */
if (lockres->l_flags & OCFS2_LOCK_BLOCKED) {
switch(lockres->l_blocking) {
}
if (kick)
- ocfs2_kick_vote_thread(osb);
+ ocfs2_wake_downconvert_thread(osb);
mlog_exit_void();
}
}
/*
- * This is working around a lock inversion between tasks acquiring DLM locks
- * while holding a page lock and the vote thread which blocks dlm lock acquiry
- * while acquiring page locks.
+ * This is working around a lock inversion between tasks acquiring DLM
+ * locks while holding a page lock and the downconvert thread which
+ * blocks dlm lock acquiry while acquiring page locks.
*
* ** These _with_page variantes are only intended to be called from aop
* methods that hold page locks and return a very specific *positive* error
* code that aop methods pass up to the VFS -- test for errors with != 0. **
*
- * The DLM is called such that it returns -EAGAIN if it would have blocked
- * waiting for the vote thread. In that case we unlock our page so the vote
- * thread can make progress. Once we've done this we have to return
- * AOP_TRUNCATED_PAGE so the aop method that called us can bubble that back up
- * into the VFS who will then immediately retry the aop call.
+ * The DLM is called such that it returns -EAGAIN if it would have
+ * blocked waiting for the downconvert thread. In that case we unlock
+ * our page so the downconvert thread can make progress. Once we've
+ * done this we have to return AOP_TRUNCATED_PAGE so the aop method
+ * that called us can bubble that back up into the VFS who will then
+ * immediately retry the aop call.
*
* We do a blocking lock and immediate unlock before returning, though, so that
* the lock has a great chance of being cached on this node by the time the VFS
goto bail;
}
- /* launch vote thread */
- osb->vote_task = kthread_run(ocfs2_vote_thread, osb, "ocfs2vote");
- if (IS_ERR(osb->vote_task)) {
- status = PTR_ERR(osb->vote_task);
- osb->vote_task = NULL;
+ /* launch downconvert thread */
+ osb->dc_task = kthread_run(ocfs2_downconvert_thread, osb, "ocfs2dc");
+ if (IS_ERR(osb->dc_task)) {
+ status = PTR_ERR(osb->dc_task);
+ osb->dc_task = NULL;
mlog_errno(status);
goto bail;
}
bail:
if (status < 0) {
ocfs2_dlm_shutdown_debug(osb);
- if (osb->vote_task)
- kthread_stop(osb->vote_task);
+ if (osb->dc_task)
+ kthread_stop(osb->dc_task);
}
mlog_exit(status);
ocfs2_drop_osb_locks(osb);
- if (osb->vote_task) {
- kthread_stop(osb->vote_task);
- osb->vote_task = NULL;
+ if (osb->dc_task) {
+ kthread_stop(osb->dc_task);
+ osb->dc_task = NULL;
}
ocfs2_lock_res_free(&osb->osb_super_lockres);
/* Mark the lockres as being dropped. It will no longer be
* queued if blocking, but we still may have to wait on it
- * being dequeued from the vote thread before we can consider
+ * being dequeued from the downconvert thread before we can consider
* it safe to drop.
*
* You can *not* attempt to call cluster_lock on this lockres anymore. */
/*
* Does the final reference drop on our dentry lock. Right now this
- * happens in the vote thread, but we could choose to simplify the
+ * happens in the downconvert thread, but we could choose to simplify the
* dlmglue API and push these off to the ocfs2_wq in the future.
*/
static void ocfs2_dentry_post_unlock(struct ocfs2_super *osb,
mlog(0, "lockres %s blocked.\n", lockres->l_name);
/* Detect whether a lock has been marked as going away while
- * the vote thread was processing other things. A lock can
+ * the downconvert thread was processing other things. A lock can
* still be marked with OCFS2_LOCK_FREEING after this check,
* but short circuiting here will still save us some
* performance. */
lockres_or_flags(lockres, OCFS2_LOCK_QUEUED);
- spin_lock(&osb->vote_task_lock);
+ spin_lock(&osb->dc_task_lock);
if (list_empty(&lockres->l_blocked_list)) {
list_add_tail(&lockres->l_blocked_list,
&osb->blocked_lock_list);
osb->blocked_lock_count++;
}
- spin_unlock(&osb->vote_task_lock);
+ spin_unlock(&osb->dc_task_lock);
mlog_exit_void();
}
+
+static void ocfs2_downconvert_thread_do_work(struct ocfs2_super *osb)
+{
+ unsigned long processed;
+ struct ocfs2_lock_res *lockres;
+
+ mlog_entry_void();
+
+ spin_lock(&osb->dc_task_lock);
+ /* grab this early so we know to try again if a state change and
+ * wake happens part-way through our work */
+ osb->dc_work_sequence = osb->dc_wake_sequence;
+
+ processed = osb->blocked_lock_count;
+ while (processed) {
+ BUG_ON(list_empty(&osb->blocked_lock_list));
+
+ lockres = list_entry(osb->blocked_lock_list.next,
+ struct ocfs2_lock_res, l_blocked_list);
+ list_del_init(&lockres->l_blocked_list);
+ osb->blocked_lock_count--;
+ spin_unlock(&osb->dc_task_lock);
+
+ BUG_ON(!processed);
+ processed--;
+
+ ocfs2_process_blocked_lock(osb, lockres);
+
+ spin_lock(&osb->dc_task_lock);
+ }
+ spin_unlock(&osb->dc_task_lock);
+
+ mlog_exit_void();
+}
+
+static int ocfs2_downconvert_thread_lists_empty(struct ocfs2_super *osb)
+{
+ int empty = 0;
+
+ spin_lock(&osb->dc_task_lock);
+ if (list_empty(&osb->blocked_lock_list))
+ empty = 1;
+
+ spin_unlock(&osb->dc_task_lock);
+ return empty;
+}
+
+static int ocfs2_downconvert_thread_should_wake(struct ocfs2_super *osb)
+{
+ int should_wake = 0;
+
+ spin_lock(&osb->dc_task_lock);
+ if (osb->dc_work_sequence != osb->dc_wake_sequence)
+ should_wake = 1;
+ spin_unlock(&osb->dc_task_lock);
+
+ return should_wake;
+}
+
+int ocfs2_downconvert_thread(void *arg)
+{
+ int status = 0;
+ struct ocfs2_super *osb = arg;
+
+ /* only quit once we've been asked to stop and there is no more
+ * work available */
+ while (!(kthread_should_stop() &&
+ ocfs2_downconvert_thread_lists_empty(osb))) {
+
+ wait_event_interruptible(osb->dc_event,
+ ocfs2_downconvert_thread_should_wake(osb) ||
+ kthread_should_stop());
+
+ mlog(0, "downconvert_thread: awoken\n");
+
+ ocfs2_downconvert_thread_do_work(osb);
+ }
+
+ osb->dc_task = NULL;
+ return status;
+}
+
+void ocfs2_wake_downconvert_thread(struct ocfs2_super *osb)
+{
+ spin_lock(&osb->dc_task_lock);
+ /* make sure the voting thread gets a swipe at whatever changes
+ * the caller may have made to the voting state */
+ osb->dc_wake_sequence++;
+ spin_unlock(&osb->dc_task_lock);
+ wake_up(&osb->dc_event);
+}
#define OCFS2_META_LOCK_RECOVERY (0x01)
/* Instruct the dlm not to queue ourselves on the other node. */
#define OCFS2_META_LOCK_NOQUEUE (0x02)
-/* don't block waiting for the vote thread, instead return -EAGAIN */
+/* don't block waiting for the downconvert thread, instead return -EAGAIN */
#define OCFS2_LOCK_NONBLOCK (0x04)
int ocfs2_dlm_init(struct ocfs2_super *osb);
void ocfs2_simple_drop_lockres(struct ocfs2_super *osb,
struct ocfs2_lock_res *lockres);
-/* for the vote thread */
+/* for the downconvert thread */
void ocfs2_process_blocked_lock(struct ocfs2_super *osb,
struct ocfs2_lock_res *lockres);
+void ocfs2_wake_downconvert_thread(struct ocfs2_super *osb);
struct ocfs2_dlm_debug *ocfs2_new_dlm_debug(void);
void ocfs2_put_dlm_debug(struct ocfs2_dlm_debug *dlm_debug);
#include "heartbeat.h"
#include "inode.h"
#include "journal.h"
-#include "vote.h"
#include "buffer_head_io.h"
void ocfs2_init_node_maps(struct ocfs2_super *osb)
{
spin_lock_init(&osb->node_map_lock);
- ocfs2_node_map_init(&osb->mounted_map);
ocfs2_node_map_init(&osb->recovery_map);
- ocfs2_node_map_init(&osb->umount_map);
ocfs2_node_map_init(&osb->osb_recovering_orphan_dirs);
}
}
ocfs2_recovery_thread(osb, node_num);
-
- ocfs2_remove_node_from_vote_queues(osb, node_num);
}
/* Called from the dlm when it's about to evict a node. We may also
spin_lock(&osb->node_map_lock);
- __ocfs2_node_map_clear_bit(&osb->mounted_map, num);
-
if (!test_bit(num, osb->recovery_map.map)) {
__ocfs2_node_map_set_bit(&osb->recovery_map, num);
set = 1;
#include "symlink.h"
#include "sysfile.h"
#include "uptodate.h"
-#include "vote.h"
#include "buffer_head_io.h"
}
/* we do this while holding the orphan dir lock because we
- * don't want recovery being run from another node to vote for
- * an inode delete on us -- this will result in two nodes
+ * don't want recovery being run from another node to try an
+ * inode delete underneath us -- this will result in two nodes
* truncating the same file! */
status = ocfs2_truncate_for_delete(osb, inode, di_bh);
if (status < 0) {
}
/* There is a series of simple checks that should be done before a
- * vote is even considered. Encapsulate those in this function. */
+ * trylock is even considered. Encapsulate those in this function. */
static int ocfs2_inode_is_valid_to_delete(struct inode *inode)
{
int ret = 0;
goto bail;
}
- /* If we're coming from process_vote we can't go into our own
+ /* If we're coming from downconvert_thread we can't go into our own
* voting [hello, deadlock city!], so unforuntately we just
* have to skip deleting this guy. That's OK though because
* the node who's doing the actual deleting should handle it
* anyway. */
- if (current == osb->vote_task) {
+ if (current == osb->dc_task) {
mlog(0, "Skipping delete of %lu because we're currently "
- "in process_vote\n", inode->i_ino);
+ "in downconvert\n", inode->i_ino);
goto bail;
}
goto bail_unlock;
}
- /* If we have voted "yes" on the wipe of this inode for
- * another node, it will be marked here so we can safely skip
- * it. Recovery will cleanup any inodes we might inadvertantly
- * skip here. */
+ /* If we have allowd wipe of this inode for another node, it
+ * will be marked here so we can safely skip it. Recovery will
+ * cleanup any inodes we might inadvertantly skip here. */
if (oi->ip_flags & OCFS2_INODE_SKIP_DELETE) {
mlog(0, "Skipping delete of %lu because another node "
"has done this for us.\n", inode->i_ino);
/* Lock down the inode. This gives us an up to date view of
* it's metadata (for verification), and allows us to
- * serialize delete_inode votes.
+ * serialize delete_inode on multiple nodes.
*
* Even though we might be doing a truncate, we don't take the
* allocation lock here as it won't be needed - nobody will
* before we go ahead and wipe the inode. */
status = ocfs2_query_inode_wipe(inode, di_bh, &wipe);
if (!wipe || status < 0) {
- /* Error and inode busy vote both mean we won't be
+ /* Error and remote inode busy both mean we won't be
* removing the inode, so they take almost the same
* path. */
if (status < 0)
mlog_errno(status);
- /* Someone in the cluster has voted to not wipe this
- * inode, or it was never completely orphaned. Write
- * out the pages and exit now. */
+ /* Someone in the cluster has disallowed a wipe of
+ * this inode, or it was never completely
+ * orphaned. Write out the pages and exit now. */
ocfs2_cleanup_delete_inode(inode, 1);
goto bail_unlock_inode;
}
mlog_bug_on_msg(OCFS2_SB(inode->i_sb) == NULL,
"Inode=%lu\n", inode->i_ino);
- /* For remove delete_inode vote, we hold open lock before,
- * now it is time to unlock PR and EX open locks. */
+ /* To preven remote deletes we hold open lock before, now it
+ * is time to unlock PR and EX open locks. */
ocfs2_open_unlock(inode);
/* Do these before all the other work so that we don't bounce
- * the vote thread while waiting to destroy the locks. */
+ * the downconvert thread while waiting to destroy the locks. */
ocfs2_mark_lockres_freeing(&oi->ip_rw_lockres);
ocfs2_mark_lockres_freeing(&oi->ip_meta_lockres);
ocfs2_mark_lockres_freeing(&oi->ip_data_lockres);
#include "localalloc.h"
#include "slot_map.h"
#include "super.h"
-#include "vote.h"
#include "sysfile.h"
#include "buffer_head_io.h"
mlog(0, "commit_thread: flushed transaction %lu (%u handles)\n",
journal->j_trans_id, flushed);
- ocfs2_kick_vote_thread(osb);
+ ocfs2_wake_downconvert_thread(osb);
wake_up(&journal->j_checkpointed);
finally:
mlog_exit(status);
ocfs2_super_unlock(osb, 1);
/* We always run recovery on our own orphan dir - the dead
- * node(s) may have voted "no" on an inode delete earlier. A
- * revote is therefore required. */
+ * node(s) may have disallowd a previos inode delete. Re-processing
+ * is therefore required. */
ocfs2_queue_recovery_completion(osb->journal, osb->slot_num, NULL,
NULL);
iter = oi->ip_next_orphan;
spin_lock(&oi->ip_lock);
- /* Delete voting may have set these on the assumption
- * that the other node would wipe them successfully.
- * If they are still in the node's orphan dir, we need
- * to reset that state. */
+ /* The remote delete code may have set these on the
+ * assumption that the other node would wipe them
+ * successfully. If they are still in the node's
+ * orphan dir, we need to reset that state. */
oi->ip_flags &= ~(OCFS2_INODE_DELETED|OCFS2_INODE_SKIP_DELETE);
/* Set the proper information to get us going into
#include "symlink.h"
#include "sysfile.h"
#include "uptodate.h"
-#include "vote.h"
#include "buffer_head_io.h"
/* Don't drop the cluster lock until *after* the d_add --
* unlink on another node will message us to remove that
* dentry under this lock so otherwise we can race this with
- * the vote thread and have a stale dentry. */
+ * the downconvert thread and have a stale dentry. */
ocfs2_meta_unlock(dir, 0);
bail:
status = ocfs2_remote_dentry_delete(dentry);
if (status < 0) {
- /* This vote should succeed under all normal
+ /* This remote delete should succeed under all normal
* circumstances. */
mlog_errno(status);
goto leave;
/*
* Aside from allowing a meta data update, the locking here
- * also ensures that the vote thread on other nodes won't have
- * to concurrently downconvert the inode and the dentry locks.
+ * also ensures that the downconvert thread on other nodes
+ * won't have to concurrently downconvert the inode and the
+ * dentry locks.
*/
status = ocfs2_meta_lock(old_inode, &old_inode_bh, 1);
if (status < 0) {
struct ocfs2_slot_info *slot_info;
spinlock_t node_map_lock;
- struct ocfs2_node_map mounted_map;
struct ocfs2_node_map recovery_map;
- struct ocfs2_node_map umount_map;
u64 root_blkno;
u64 system_dir_blkno;
wait_queue_head_t recovery_event;
- spinlock_t vote_task_lock;
- struct task_struct *vote_task;
- wait_queue_head_t vote_event;
- unsigned long vote_wake_sequence;
- unsigned long vote_work_sequence;
+ spinlock_t dc_task_lock;
+ struct task_struct *dc_task;
+ wait_queue_head_t dc_event;
+ unsigned long dc_wake_sequence;
+ unsigned long dc_work_sequence;
struct list_head blocked_lock_list;
unsigned long blocked_lock_count;
- struct list_head vote_list;
- int vote_count;
-
- u32 net_key;
- spinlock_t net_response_lock;
- unsigned int net_response_ids;
- struct list_head net_response_list;
-
- struct o2hb_callback_func osb_hb_up;
- struct o2hb_callback_func osb_hb_down;
-
- struct list_head osb_net_handlers;
-
wait_queue_head_t osb_mount_event;
/* Truncate log info */
s16 slot_num,
s16 node_num);
-/* Use the slot information we've collected to create a map of mounted
- * nodes. Should be holding an EX on super block. assumes slot info is
- * up to date. Note that we call this *after* we find a slot, so our
- * own node should be set in the map too... */
-void ocfs2_populate_mounted_map(struct ocfs2_super *osb)
-{
- int i;
- struct ocfs2_slot_info *si = osb->slot_info;
-
- spin_lock(&si->si_lock);
-
- for (i = 0; i < si->si_size; i++)
- if (si->si_global_node_nums[i] != OCFS2_INVALID_SLOT)
- ocfs2_node_map_set_bit(osb, &osb->mounted_map,
- si->si_global_node_nums[i]);
-
- spin_unlock(&si->si_lock);
-}
-
/* post the slot information on disk into our slot_info struct. */
void ocfs2_update_slot_info(struct ocfs2_slot_info *si)
{
void ocfs2_clear_slot(struct ocfs2_slot_info *si,
s16 slot_num);
-void ocfs2_populate_mounted_map(struct ocfs2_super *osb);
-
static inline int ocfs2_is_empty_slot(struct ocfs2_slot_info *si,
int slot_num)
{
#include "sysfile.h"
#include "uptodate.h"
#include "ver.h"
-#include "vote.h"
#include "buffer_head_io.h"
goto leave;
}
- /* requires vote_thread to be running. */
- status = ocfs2_register_net_handlers(osb);
- if (status < 0) {
- mlog_errno(status);
- goto leave;
- }
-
status = ocfs2_super_lock(osb, 1);
if (status < 0) {
mlog_errno(status);
goto leave;
}
- ocfs2_populate_mounted_map(osb);
-
/* load all node-local system inodes */
status = ocfs2_init_local_system_inodes(osb);
if (status < 0) {
if (ocfs2_mount_local(osb))
goto leave;
- /* This should be sent *after* we recovered our journal as it
- * will cause other nodes to unmark us as needing
- * recovery. However, we need to send it *before* dropping the
- * super block lock as otherwise their recovery threads might
- * try to clean us up while we're live! */
- status = ocfs2_request_mount_vote(osb);
- if (status < 0)
- mlog_errno(status);
-
leave:
if (unlock_super)
ocfs2_super_unlock(osb, 1);
mlog_errno(tmp);
return;
}
-
- tmp = ocfs2_request_umount_vote(osb);
- if (tmp < 0)
- mlog_errno(tmp);
}
if (osb->slot_num != OCFS2_INVALID_SLOT)
ocfs2_release_system_inodes(osb);
- if (osb->dlm) {
- ocfs2_unregister_net_handlers(osb);
-
+ if (osb->dlm)
ocfs2_dlm_shutdown(osb);
- }
debugfs_remove(osb->osb_debug_root);
osb->s_sectsize_bits = blksize_bits(sector_size);
BUG_ON(!osb->s_sectsize_bits);
- osb->net_response_ids = 0;
- spin_lock_init(&osb->net_response_lock);
- INIT_LIST_HEAD(&osb->net_response_list);
-
- INIT_LIST_HEAD(&osb->osb_net_handlers);
init_waitqueue_head(&osb->recovery_event);
- spin_lock_init(&osb->vote_task_lock);
- init_waitqueue_head(&osb->vote_event);
- osb->vote_work_sequence = 0;
- osb->vote_wake_sequence = 0;
+ spin_lock_init(&osb->dc_task_lock);
+ init_waitqueue_head(&osb->dc_event);
+ osb->dc_work_sequence = 0;
+ osb->dc_wake_sequence = 0;
INIT_LIST_HEAD(&osb->blocked_lock_list);
osb->blocked_lock_count = 0;
- INIT_LIST_HEAD(&osb->vote_list);
spin_lock_init(&osb->osb_lock);
atomic_set(&osb->alloc_stats.moves, 0);
}
memcpy(&uuid_net_key, di->id2.i_super.s_uuid, sizeof(uuid_net_key));
- osb->net_key = le32_to_cpu(uuid_net_key);
strncpy(osb->vol_label, di->id2.i_super.s_label, 63);
osb->vol_label[63] = '\0';
+++ /dev/null
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
- * vote.c
- *
- * description here
- *
- * Copyright (C) 2003, 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/kthread.h>
-
-#include <cluster/heartbeat.h>
-#include <cluster/nodemanager.h>
-#include <cluster/tcp.h>
-
-#include <dlm/dlmapi.h>
-
-#define MLOG_MASK_PREFIX ML_VOTE
-#include <cluster/masklog.h>
-
-#include "ocfs2.h"
-
-#include "alloc.h"
-#include "dlmglue.h"
-#include "extent_map.h"
-#include "heartbeat.h"
-#include "inode.h"
-#include "journal.h"
-#include "slot_map.h"
-#include "vote.h"
-
-#include "buffer_head_io.h"
-
-#define OCFS2_MESSAGE_TYPE_VOTE (0x1)
-#define OCFS2_MESSAGE_TYPE_RESPONSE (0x2)
-struct ocfs2_msg_hdr
-{
- __be32 h_response_id; /* used to lookup message handle on sending
- * node. */
- __be32 h_request;
- __be64 h_blkno;
- __be32 h_generation;
- __be32 h_node_num; /* node sending this particular message. */
-};
-
-struct ocfs2_vote_msg
-{
- struct ocfs2_msg_hdr v_hdr;
- __be32 v_reserved1;
-} __attribute__ ((packed));
-
-/* Responses are given these values to maintain backwards
- * compatibility with older ocfs2 versions */
-#define OCFS2_RESPONSE_OK (0)
-#define OCFS2_RESPONSE_BUSY (-16)
-#define OCFS2_RESPONSE_BAD_MSG (-22)
-
-struct ocfs2_response_msg
-{
- struct ocfs2_msg_hdr r_hdr;
- __be32 r_response;
-} __attribute__ ((packed));
-
-struct ocfs2_vote_work {
- struct list_head w_list;
- struct ocfs2_vote_msg w_msg;
-};
-
-enum ocfs2_vote_request {
- OCFS2_VOTE_REQ_INVALID = 0,
- OCFS2_VOTE_REQ_MOUNT,
- OCFS2_VOTE_REQ_UMOUNT,
- OCFS2_VOTE_REQ_LAST
-};
-
-static inline int ocfs2_is_valid_vote_request(int request)
-{
- return OCFS2_VOTE_REQ_INVALID < request &&
- request < OCFS2_VOTE_REQ_LAST;
-}
-
-typedef void (*ocfs2_net_response_callback)(void *priv,
- struct ocfs2_response_msg *resp);
-struct ocfs2_net_response_cb {
- ocfs2_net_response_callback rc_cb;
- void *rc_priv;
-};
-
-struct ocfs2_net_wait_ctxt {
- struct list_head n_list;
- u32 n_response_id;
- wait_queue_head_t n_event;
- struct ocfs2_node_map n_node_map;
- int n_response; /* an agreggate response. 0 if
- * all nodes are go, < 0 on any
- * negative response from any
- * node or network error. */
- struct ocfs2_net_response_cb *n_callback;
-};
-
-static void ocfs2_process_mount_request(struct ocfs2_super *osb,
- unsigned int node_num)
-{
- mlog(0, "MOUNT vote from node %u\n", node_num);
- /* The other node only sends us this message when he has an EX
- * on the superblock, so our recovery threads (if having been
- * launched) are waiting on it.*/
- ocfs2_recovery_map_clear(osb, node_num);
- ocfs2_node_map_set_bit(osb, &osb->mounted_map, node_num);
-
- /* We clear the umount map here because a node may have been
- * previously mounted, safely unmounted but never stopped
- * heartbeating - in which case we'd have a stale entry. */
- ocfs2_node_map_clear_bit(osb, &osb->umount_map, node_num);
-}
-
-static void ocfs2_process_umount_request(struct ocfs2_super *osb,
- unsigned int node_num)
-{
- mlog(0, "UMOUNT vote from node %u\n", node_num);
- ocfs2_node_map_clear_bit(osb, &osb->mounted_map, node_num);
- ocfs2_node_map_set_bit(osb, &osb->umount_map, node_num);
-}
-
-static void ocfs2_process_vote(struct ocfs2_super *osb,
- struct ocfs2_vote_msg *msg)
-{
- int net_status, vote_response;
- unsigned int node_num;
- u64 blkno;
- enum ocfs2_vote_request request;
- struct ocfs2_msg_hdr *hdr = &msg->v_hdr;
- struct ocfs2_response_msg response;
-
- /* decode the network mumbo jumbo into local variables. */
- request = be32_to_cpu(hdr->h_request);
- blkno = be64_to_cpu(hdr->h_blkno);
- node_num = be32_to_cpu(hdr->h_node_num);
-
- mlog(0, "processing vote: request = %u, blkno = %llu, node_num = %u\n",
- request, (unsigned long long)blkno, node_num);
-
- if (!ocfs2_is_valid_vote_request(request)) {
- mlog(ML_ERROR, "Invalid vote request %d from node %u\n",
- request, node_num);
- vote_response = OCFS2_RESPONSE_BAD_MSG;
- goto respond;
- }
-
- vote_response = OCFS2_RESPONSE_OK;
-
- switch (request) {
- case OCFS2_VOTE_REQ_UMOUNT:
- ocfs2_process_umount_request(osb, node_num);
- goto respond;
- case OCFS2_VOTE_REQ_MOUNT:
- ocfs2_process_mount_request(osb, node_num);
- goto respond;
- default:
- /* avoids a gcc warning */
- break;
- }
-
-respond:
- /* Response struture is small so we just put it on the stack
- * and stuff it inline. */
- memset(&response, 0, sizeof(struct ocfs2_response_msg));
- response.r_hdr.h_response_id = hdr->h_response_id;
- response.r_hdr.h_blkno = hdr->h_blkno;
- response.r_hdr.h_generation = hdr->h_generation;
- response.r_hdr.h_node_num = cpu_to_be32(osb->node_num);
- response.r_response = cpu_to_be32(vote_response);
-
- net_status = o2net_send_message(OCFS2_MESSAGE_TYPE_RESPONSE,
- osb->net_key,
- &response,
- sizeof(struct ocfs2_response_msg),
- node_num,
- NULL);
- /* We still want to error print for ENOPROTOOPT here. The
- * sending node shouldn't have unregistered his net handler
- * without sending an unmount vote 1st */
- if (net_status < 0
- && net_status != -ETIMEDOUT
- && net_status != -ENOTCONN)
- mlog(ML_ERROR, "message to node %u fails with error %d!\n",
- node_num, net_status);
-}
-
-static void ocfs2_vote_thread_do_work(struct ocfs2_super *osb)
-{
- unsigned long processed;
- struct ocfs2_lock_res *lockres;
- struct ocfs2_vote_work *work;
-
- mlog_entry_void();
-
- spin_lock(&osb->vote_task_lock);
- /* grab this early so we know to try again if a state change and
- * wake happens part-way through our work */
- osb->vote_work_sequence = osb->vote_wake_sequence;
-
- processed = osb->blocked_lock_count;
- while (processed) {
- BUG_ON(list_empty(&osb->blocked_lock_list));
-
- lockres = list_entry(osb->blocked_lock_list.next,
- struct ocfs2_lock_res, l_blocked_list);
- list_del_init(&lockres->l_blocked_list);
- osb->blocked_lock_count--;
- spin_unlock(&osb->vote_task_lock);
-
- BUG_ON(!processed);
- processed--;
-
- ocfs2_process_blocked_lock(osb, lockres);
-
- spin_lock(&osb->vote_task_lock);
- }
-
- while (osb->vote_count) {
- BUG_ON(list_empty(&osb->vote_list));
- work = list_entry(osb->vote_list.next,
- struct ocfs2_vote_work, w_list);
- list_del(&work->w_list);
- osb->vote_count--;
- spin_unlock(&osb->vote_task_lock);
-
- ocfs2_process_vote(osb, &work->w_msg);
- kfree(work);
-
- spin_lock(&osb->vote_task_lock);
- }
- spin_unlock(&osb->vote_task_lock);
-
- mlog_exit_void();
-}
-
-static int ocfs2_vote_thread_lists_empty(struct ocfs2_super *osb)
-{
- int empty = 0;
-
- spin_lock(&osb->vote_task_lock);
- if (list_empty(&osb->blocked_lock_list) &&
- list_empty(&osb->vote_list))
- empty = 1;
-
- spin_unlock(&osb->vote_task_lock);
- return empty;
-}
-
-static int ocfs2_vote_thread_should_wake(struct ocfs2_super *osb)
-{
- int should_wake = 0;
-
- spin_lock(&osb->vote_task_lock);
- if (osb->vote_work_sequence != osb->vote_wake_sequence)
- should_wake = 1;
- spin_unlock(&osb->vote_task_lock);
-
- return should_wake;
-}
-
-int ocfs2_vote_thread(void *arg)
-{
- int status = 0;
- struct ocfs2_super *osb = arg;
-
- /* only quit once we've been asked to stop and there is no more
- * work available */
- while (!(kthread_should_stop() &&
- ocfs2_vote_thread_lists_empty(osb))) {
-
- wait_event_interruptible(osb->vote_event,
- ocfs2_vote_thread_should_wake(osb) ||
- kthread_should_stop());
-
- mlog(0, "vote_thread: awoken\n");
-
- ocfs2_vote_thread_do_work(osb);
- }
-
- osb->vote_task = NULL;
- return status;
-}
-
-static struct ocfs2_net_wait_ctxt *ocfs2_new_net_wait_ctxt(unsigned int response_id)
-{
- struct ocfs2_net_wait_ctxt *w;
-
- w = kzalloc(sizeof(*w), GFP_NOFS);
- if (!w) {
- mlog_errno(-ENOMEM);
- goto bail;
- }
-
- INIT_LIST_HEAD(&w->n_list);
- init_waitqueue_head(&w->n_event);
- ocfs2_node_map_init(&w->n_node_map);
- w->n_response_id = response_id;
- w->n_callback = NULL;
-bail:
- return w;
-}
-
-static unsigned int ocfs2_new_response_id(struct ocfs2_super *osb)
-{
- unsigned int ret;
-
- spin_lock(&osb->net_response_lock);
- ret = ++osb->net_response_ids;
- spin_unlock(&osb->net_response_lock);
-
- return ret;
-}
-
-static void ocfs2_dequeue_net_wait_ctxt(struct ocfs2_super *osb,
- struct ocfs2_net_wait_ctxt *w)
-{
- spin_lock(&osb->net_response_lock);
- list_del(&w->n_list);
- spin_unlock(&osb->net_response_lock);
-}
-
-static void ocfs2_queue_net_wait_ctxt(struct ocfs2_super *osb,
- struct ocfs2_net_wait_ctxt *w)
-{
- spin_lock(&osb->net_response_lock);
- list_add_tail(&w->n_list,
- &osb->net_response_list);
- spin_unlock(&osb->net_response_lock);
-}
-
-static void __ocfs2_mark_node_responded(struct ocfs2_super *osb,
- struct ocfs2_net_wait_ctxt *w,
- int node_num)
-{
- assert_spin_locked(&osb->net_response_lock);
-
- ocfs2_node_map_clear_bit(osb, &w->n_node_map, node_num);
- if (ocfs2_node_map_is_empty(osb, &w->n_node_map))
- wake_up(&w->n_event);
-}
-
-/* Intended to be called from the node down callback, we fake remove
- * the node from all our response contexts */
-void ocfs2_remove_node_from_vote_queues(struct ocfs2_super *osb,
- int node_num)
-{
- struct list_head *p;
- struct ocfs2_net_wait_ctxt *w = NULL;
-
- spin_lock(&osb->net_response_lock);
-
- list_for_each(p, &osb->net_response_list) {
- w = list_entry(p, struct ocfs2_net_wait_ctxt, n_list);
-
- __ocfs2_mark_node_responded(osb, w, node_num);
- }
-
- spin_unlock(&osb->net_response_lock);
-}
-
-static int ocfs2_broadcast_vote(struct ocfs2_super *osb,
- struct ocfs2_vote_msg *request,
- unsigned int response_id,
- int *response,
- struct ocfs2_net_response_cb *callback)
-{
- int status, i, remote_err;
- struct ocfs2_net_wait_ctxt *w = NULL;
- int dequeued = 0;
-
- mlog_entry_void();
-
- w = ocfs2_new_net_wait_ctxt(response_id);
- if (!w) {
- status = -ENOMEM;
- mlog_errno(status);
- goto bail;
- }
- w->n_callback = callback;
-
- /* we're pretty much ready to go at this point, and this fills
- * in n_response which we need anyway... */
- ocfs2_queue_net_wait_ctxt(osb, w);
-
- i = ocfs2_node_map_iterate(osb, &osb->mounted_map, 0);
-
- while (i != O2NM_INVALID_NODE_NUM) {
- if (i != osb->node_num) {
- mlog(0, "trying to send request to node %i\n", i);
- ocfs2_node_map_set_bit(osb, &w->n_node_map, i);
-
- remote_err = 0;
- status = o2net_send_message(OCFS2_MESSAGE_TYPE_VOTE,
- osb->net_key,
- request,
- sizeof(*request),
- i,
- &remote_err);
- if (status == -ETIMEDOUT) {
- mlog(0, "remote node %d timed out!\n", i);
- status = -EAGAIN;
- goto bail;
- }
- if (remote_err < 0) {
- status = remote_err;
- mlog(0, "remote error %d on node %d!\n",
- remote_err, i);
- mlog_errno(status);
- goto bail;
- }
- if (status < 0) {
- mlog_errno(status);
- goto bail;
- }
- }
- i++;
- i = ocfs2_node_map_iterate(osb, &osb->mounted_map, i);
- mlog(0, "next is %d, i am %d\n", i, osb->node_num);
- }
- mlog(0, "done sending, now waiting on responses...\n");
-
- wait_event(w->n_event, ocfs2_node_map_is_empty(osb, &w->n_node_map));
-
- ocfs2_dequeue_net_wait_ctxt(osb, w);
- dequeued = 1;
-
- *response = w->n_response;
- status = 0;
-bail:
- if (w) {
- if (!dequeued)
- ocfs2_dequeue_net_wait_ctxt(osb, w);
- kfree(w);
- }
-
- mlog_exit(status);
- return status;
-}
-
-static struct ocfs2_vote_msg * ocfs2_new_vote_request(struct ocfs2_super *osb,
- u64 blkno,
- unsigned int generation,
- enum ocfs2_vote_request type)
-{
- struct ocfs2_vote_msg *request;
- struct ocfs2_msg_hdr *hdr;
-
- BUG_ON(!ocfs2_is_valid_vote_request(type));
-
- request = kzalloc(sizeof(*request), GFP_NOFS);
- if (!request) {
- mlog_errno(-ENOMEM);
- } else {
- hdr = &request->v_hdr;
- hdr->h_node_num = cpu_to_be32(osb->node_num);
- hdr->h_request = cpu_to_be32(type);
- hdr->h_blkno = cpu_to_be64(blkno);
- hdr->h_generation = cpu_to_be32(generation);
- }
-
- return request;
-}
-
-/* Complete the buildup of a new vote request and process the
- * broadcast return value. */
-static int ocfs2_do_request_vote(struct ocfs2_super *osb,
- struct ocfs2_vote_msg *request,
- struct ocfs2_net_response_cb *callback)
-{
- int status, response = -EBUSY;
- unsigned int response_id;
- struct ocfs2_msg_hdr *hdr;
-
- response_id = ocfs2_new_response_id(osb);
-
- hdr = &request->v_hdr;
- hdr->h_response_id = cpu_to_be32(response_id);
-
- status = ocfs2_broadcast_vote(osb, request, response_id, &response,
- callback);
- if (status < 0) {
- mlog_errno(status);
- goto bail;
- }
-
- status = response;
-bail:
-
- return status;
-}
-
-int ocfs2_request_mount_vote(struct ocfs2_super *osb)
-{
- int status;
- struct ocfs2_vote_msg *request = NULL;
-
- request = ocfs2_new_vote_request(osb, 0ULL, 0, OCFS2_VOTE_REQ_MOUNT);
- if (!request) {
- status = -ENOMEM;
- goto bail;
- }
-
- status = -EAGAIN;
- while (status == -EAGAIN) {
- if (!(osb->s_mount_opt & OCFS2_MOUNT_NOINTR) &&
- signal_pending(current)) {
- status = -ERESTARTSYS;
- goto bail;
- }
-
- if (ocfs2_node_map_is_only(osb, &osb->mounted_map,
- osb->node_num)) {
- status = 0;
- goto bail;
- }
-
- status = ocfs2_do_request_vote(osb, request, NULL);
- }
-
-bail:
- kfree(request);
- return status;
-}
-
-int ocfs2_request_umount_vote(struct ocfs2_super *osb)
-{
- int status;
- struct ocfs2_vote_msg *request = NULL;
-
- request = ocfs2_new_vote_request(osb, 0ULL, 0, OCFS2_VOTE_REQ_UMOUNT);
- if (!request) {
- status = -ENOMEM;
- goto bail;
- }
-
- status = -EAGAIN;
- while (status == -EAGAIN) {
- /* Do not check signals on this vote... We really want
- * this one to go all the way through. */
-
- if (ocfs2_node_map_is_only(osb, &osb->mounted_map,
- osb->node_num)) {
- status = 0;
- goto bail;
- }
-
- status = ocfs2_do_request_vote(osb, request, NULL);
- }
-
-bail:
- kfree(request);
- return status;
-}
-
-/* TODO: This should eventually be a hash table! */
-static struct ocfs2_net_wait_ctxt * __ocfs2_find_net_wait_ctxt(struct ocfs2_super *osb,
- u32 response_id)
-{
- struct list_head *p;
- struct ocfs2_net_wait_ctxt *w = NULL;
-
- list_for_each(p, &osb->net_response_list) {
- w = list_entry(p, struct ocfs2_net_wait_ctxt, n_list);
- if (response_id == w->n_response_id)
- break;
- w = NULL;
- }
-
- return w;
-}
-
-/* Translate response codes into local node errno values */
-static inline int ocfs2_translate_response(int response)
-{
- int ret;
-
- switch (response) {
- case OCFS2_RESPONSE_OK:
- ret = 0;
- break;
-
- case OCFS2_RESPONSE_BUSY:
- ret = -EBUSY;
- break;
-
- default:
- ret = -EINVAL;
- }
-
- return ret;
-}
-
-static int ocfs2_handle_response_message(struct o2net_msg *msg,
- u32 len,
- void *data, void **ret_data)
-{
- unsigned int response_id, node_num;
- int response_status;
- struct ocfs2_super *osb = data;
- struct ocfs2_response_msg *resp;
- struct ocfs2_net_wait_ctxt * w;
- struct ocfs2_net_response_cb *resp_cb;
-
- resp = (struct ocfs2_response_msg *) msg->buf;
-
- response_id = be32_to_cpu(resp->r_hdr.h_response_id);
- node_num = be32_to_cpu(resp->r_hdr.h_node_num);
- response_status =
- ocfs2_translate_response(be32_to_cpu(resp->r_response));
-
- mlog(0, "received response message:\n");
- mlog(0, "h_response_id = %u\n", response_id);
- mlog(0, "h_request = %u\n", be32_to_cpu(resp->r_hdr.h_request));
- mlog(0, "h_blkno = %llu\n",
- (unsigned long long)be64_to_cpu(resp->r_hdr.h_blkno));
- mlog(0, "h_generation = %u\n", be32_to_cpu(resp->r_hdr.h_generation));
- mlog(0, "h_node_num = %u\n", node_num);
- mlog(0, "r_response = %d\n", response_status);
-
- spin_lock(&osb->net_response_lock);
- w = __ocfs2_find_net_wait_ctxt(osb, response_id);
- if (!w) {
- mlog(0, "request not found!\n");
- goto bail;
- }
- resp_cb = w->n_callback;
-
- if (response_status && (!w->n_response)) {
- /* we only really need one negative response so don't
- * set it twice. */
- w->n_response = response_status;
- }
-
- if (resp_cb) {
- spin_unlock(&osb->net_response_lock);
-
- resp_cb->rc_cb(resp_cb->rc_priv, resp);
-
- spin_lock(&osb->net_response_lock);
- }
-
- __ocfs2_mark_node_responded(osb, w, node_num);
-bail:
- spin_unlock(&osb->net_response_lock);
-
- return 0;
-}
-
-static int ocfs2_handle_vote_message(struct o2net_msg *msg,
- u32 len,
- void *data, void **ret_data)
-{
- int status;
- struct ocfs2_super *osb = data;
- struct ocfs2_vote_work *work;
-
- work = kmalloc(sizeof(struct ocfs2_vote_work), GFP_NOFS);
- if (!work) {
- status = -ENOMEM;
- mlog_errno(status);
- goto bail;
- }
-
- INIT_LIST_HEAD(&work->w_list);
- memcpy(&work->w_msg, msg->buf, sizeof(struct ocfs2_vote_msg));
-
- mlog(0, "scheduling vote request:\n");
- mlog(0, "h_response_id = %u\n",
- be32_to_cpu(work->w_msg.v_hdr.h_response_id));
- mlog(0, "h_request = %u\n", be32_to_cpu(work->w_msg.v_hdr.h_request));
- mlog(0, "h_blkno = %llu\n",
- (unsigned long long)be64_to_cpu(work->w_msg.v_hdr.h_blkno));
- mlog(0, "h_generation = %u\n",
- be32_to_cpu(work->w_msg.v_hdr.h_generation));
- mlog(0, "h_node_num = %u\n",
- be32_to_cpu(work->w_msg.v_hdr.h_node_num));
-
- spin_lock(&osb->vote_task_lock);
- list_add_tail(&work->w_list, &osb->vote_list);
- osb->vote_count++;
- spin_unlock(&osb->vote_task_lock);
-
- ocfs2_kick_vote_thread(osb);
-
- status = 0;
-bail:
- return status;
-}
-
-void ocfs2_unregister_net_handlers(struct ocfs2_super *osb)
-{
- if (!osb->net_key)
- return;
-
- o2net_unregister_handler_list(&osb->osb_net_handlers);
-
- if (!list_empty(&osb->net_response_list))
- mlog(ML_ERROR, "net response list not empty!\n");
-
- osb->net_key = 0;
-}
-
-int ocfs2_register_net_handlers(struct ocfs2_super *osb)
-{
- int status = 0;
-
- if (ocfs2_mount_local(osb))
- return 0;
-
- status = o2net_register_handler(OCFS2_MESSAGE_TYPE_RESPONSE,
- osb->net_key,
- sizeof(struct ocfs2_response_msg),
- ocfs2_handle_response_message,
- osb, NULL, &osb->osb_net_handlers);
- if (status) {
- mlog_errno(status);
- goto bail;
- }
-
- status = o2net_register_handler(OCFS2_MESSAGE_TYPE_VOTE,
- osb->net_key,
- sizeof(struct ocfs2_vote_msg),
- ocfs2_handle_vote_message,
- osb, NULL, &osb->osb_net_handlers);
- if (status) {
- mlog_errno(status);
- goto bail;
- }
-bail:
- if (status < 0)
- ocfs2_unregister_net_handlers(osb);
-
- return status;
-}
+++ /dev/null
-/* -*- mode: c; c-basic-offset: 8; -*-
- * vim: noexpandtab sw=8 ts=8 sts=0:
- *
- * vote.h
- *
- * description here
- *
- * Copyright (C) 2002, 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.
- */
-
-
-#ifndef VOTE_H
-#define VOTE_H
-
-int ocfs2_vote_thread(void *arg);
-static inline void ocfs2_kick_vote_thread(struct ocfs2_super *osb)
-{
- spin_lock(&osb->vote_task_lock);
- /* make sure the voting thread gets a swipe at whatever changes
- * the caller may have made to the voting state */
- osb->vote_wake_sequence++;
- spin_unlock(&osb->vote_task_lock);
- wake_up(&osb->vote_event);
-}
-
-int ocfs2_request_mount_vote(struct ocfs2_super *osb);
-int ocfs2_request_umount_vote(struct ocfs2_super *osb);
-int ocfs2_register_net_handlers(struct ocfs2_super *osb);
-void ocfs2_unregister_net_handlers(struct ocfs2_super *osb);
-
-void ocfs2_remove_node_from_vote_queues(struct ocfs2_super *osb,
- int node_num);
-#endif
projects / linux-2.6 / commitdiff