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-rw-r--r--fs/gfs2/locking/dlm/Makefile3
-rw-r--r--fs/gfs2/locking/dlm/lock.c708
-rw-r--r--fs/gfs2/locking/dlm/lock_dlm.h166
-rw-r--r--fs/gfs2/locking/dlm/main.c48
-rw-r--r--fs/gfs2/locking/dlm/mount.c276
-rw-r--r--fs/gfs2/locking/dlm/sysfs.c226
-rw-r--r--fs/gfs2/locking/dlm/thread.c68
7 files changed, 0 insertions, 1495 deletions
diff --git a/fs/gfs2/locking/dlm/Makefile b/fs/gfs2/locking/dlm/Makefile
deleted file mode 100644
index 2609bb6..0000000
--- a/fs/gfs2/locking/dlm/Makefile
+++ /dev/null
@@ -1,3 +0,0 @@
-obj-$(CONFIG_GFS2_FS_LOCKING_DLM) += lock_dlm.o
-lock_dlm-y := lock.o main.o mount.o sysfs.o thread.o
-
diff --git a/fs/gfs2/locking/dlm/lock.c b/fs/gfs2/locking/dlm/lock.c
deleted file mode 100644
index 2482c90..0000000
--- a/fs/gfs2/locking/dlm/lock.c
+++ /dev/null
@@ -1,708 +0,0 @@
-/*
- * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
- * Copyright (C) 2004-2005 Red Hat, Inc. All rights reserved.
- *
- * This copyrighted material is made available to anyone wishing to use,
- * modify, copy, or redistribute it subject to the terms and conditions
- * of the GNU General Public License version 2.
- */
-
-#include "lock_dlm.h"
-
-static char junk_lvb[GDLM_LVB_SIZE];
-
-
-/* convert dlm lock-mode to gfs lock-state */
-
-static s16 gdlm_make_lmstate(s16 dlmmode)
-{
- switch (dlmmode) {
- case DLM_LOCK_IV:
- case DLM_LOCK_NL:
- return LM_ST_UNLOCKED;
- case DLM_LOCK_EX:
- return LM_ST_EXCLUSIVE;
- case DLM_LOCK_CW:
- return LM_ST_DEFERRED;
- case DLM_LOCK_PR:
- return LM_ST_SHARED;
- }
- gdlm_assert(0, "unknown DLM mode %d", dlmmode);
- return -1;
-}
-
-/* A lock placed on this queue is re-submitted to DLM as soon as the lock_dlm
- thread gets to it. */
-
-static void queue_submit(struct gdlm_lock *lp)
-{
- struct gdlm_ls *ls = lp->ls;
-
- spin_lock(&ls->async_lock);
- list_add_tail(&lp->delay_list, &ls->submit);
- spin_unlock(&ls->async_lock);
- wake_up(&ls->thread_wait);
-}
-
-static void wake_up_ast(struct gdlm_lock *lp)
-{
- clear_bit(LFL_AST_WAIT, &lp->flags);
- smp_mb__after_clear_bit();
- wake_up_bit(&lp->flags, LFL_AST_WAIT);
-}
-
-static void gdlm_delete_lp(struct gdlm_lock *lp)
-{
- struct gdlm_ls *ls = lp->ls;
-
- spin_lock(&ls->async_lock);
- if (!list_empty(&lp->delay_list))
- list_del_init(&lp->delay_list);
- ls->all_locks_count--;
- spin_unlock(&ls->async_lock);
-
- kfree(lp);
-}
-
-static void gdlm_queue_delayed(struct gdlm_lock *lp)
-{
- struct gdlm_ls *ls = lp->ls;
-
- spin_lock(&ls->async_lock);
- list_add_tail(&lp->delay_list, &ls->delayed);
- spin_unlock(&ls->async_lock);
-}
-
-static void process_complete(struct gdlm_lock *lp)
-{
- struct gdlm_ls *ls = lp->ls;
- struct lm_async_cb acb;
-
- memset(&acb, 0, sizeof(acb));
-
- if (lp->lksb.sb_status == -DLM_ECANCEL) {
- log_info("complete dlm cancel %x,%llx flags %lx",
- lp->lockname.ln_type,
- (unsigned long long)lp->lockname.ln_number,
- lp->flags);
-
- lp->req = lp->cur;
- acb.lc_ret |= LM_OUT_CANCELED;
- if (lp->cur == DLM_LOCK_IV)
- lp->lksb.sb_lkid = 0;
- goto out;
- }
-
- if (test_and_clear_bit(LFL_DLM_UNLOCK, &lp->flags)) {
- if (lp->lksb.sb_status != -DLM_EUNLOCK) {
- log_info("unlock sb_status %d %x,%llx flags %lx",
- lp->lksb.sb_status, lp->lockname.ln_type,
- (unsigned long long)lp->lockname.ln_number,
- lp->flags);
- return;
- }
-
- lp->cur = DLM_LOCK_IV;
- lp->req = DLM_LOCK_IV;
- lp->lksb.sb_lkid = 0;
-
- if (test_and_clear_bit(LFL_UNLOCK_DELETE, &lp->flags)) {
- gdlm_delete_lp(lp);
- return;
- }
- goto out;
- }
-
- if (lp->lksb.sb_flags & DLM_SBF_VALNOTVALID)
- memset(lp->lksb.sb_lvbptr, 0, GDLM_LVB_SIZE);
-
- if (lp->lksb.sb_flags & DLM_SBF_ALTMODE) {
- if (lp->req == DLM_LOCK_PR)
- lp->req = DLM_LOCK_CW;
- else if (lp->req == DLM_LOCK_CW)
- lp->req = DLM_LOCK_PR;
- }
-
- /*
- * A canceled lock request. The lock was just taken off the delayed
- * list and was never even submitted to dlm.
- */
-
- if (test_and_clear_bit(LFL_CANCEL, &lp->flags)) {
- log_info("complete internal cancel %x,%llx",
- lp->lockname.ln_type,
- (unsigned long long)lp->lockname.ln_number);
- lp->req = lp->cur;
- acb.lc_ret |= LM_OUT_CANCELED;
- goto out;
- }
-
- /*
- * An error occured.
- */
-
- if (lp->lksb.sb_status) {
- /* a "normal" error */
- if ((lp->lksb.sb_status == -EAGAIN) &&
- (lp->lkf & DLM_LKF_NOQUEUE)) {
- lp->req = lp->cur;
- if (lp->cur == DLM_LOCK_IV)
- lp->lksb.sb_lkid = 0;
- goto out;
- }
-
- /* this could only happen with cancels I think */
- log_info("ast sb_status %d %x,%llx flags %lx",
- lp->lksb.sb_status, lp->lockname.ln_type,
- (unsigned long long)lp->lockname.ln_number,
- lp->flags);
- return;
- }
-
- /*
- * This is an AST for an EX->EX conversion for sync_lvb from GFS.
- */
-
- if (test_and_clear_bit(LFL_SYNC_LVB, &lp->flags)) {
- wake_up_ast(lp);
- return;
- }
-
- /*
- * A lock has been demoted to NL because it initially completed during
- * BLOCK_LOCKS. Now it must be requested in the originally requested
- * mode.
- */
-
- if (test_and_clear_bit(LFL_REREQUEST, &lp->flags)) {
- gdlm_assert(lp->req == DLM_LOCK_NL, "%x,%llx",
- lp->lockname.ln_type,
- (unsigned long long)lp->lockname.ln_number);
- gdlm_assert(lp->prev_req > DLM_LOCK_NL, "%x,%llx",
- lp->lockname.ln_type,
- (unsigned long long)lp->lockname.ln_number);
-
- lp->cur = DLM_LOCK_NL;
- lp->req = lp->prev_req;
- lp->prev_req = DLM_LOCK_IV;
- lp->lkf &= ~DLM_LKF_CONVDEADLK;
-
- set_bit(LFL_NOCACHE, &lp->flags);
-
- if (test_bit(DFL_BLOCK_LOCKS, &ls->flags) &&
- !test_bit(LFL_NOBLOCK, &lp->flags))
- gdlm_queue_delayed(lp);
- else
- queue_submit(lp);
- return;
- }
-
- /*
- * A request is granted during dlm recovery. It may be granted
- * because the locks of a failed node were cleared. In that case,
- * there may be inconsistent data beneath this lock and we must wait
- * for recovery to complete to use it. When gfs recovery is done this
- * granted lock will be converted to NL and then reacquired in this
- * granted state.
- */
-
- if (test_bit(DFL_BLOCK_LOCKS, &ls->flags) &&
- !test_bit(LFL_NOBLOCK, &lp->flags) &&
- lp->req != DLM_LOCK_NL) {
-
- lp->cur = lp->req;
- lp->prev_req = lp->req;
- lp->req = DLM_LOCK_NL;
- lp->lkf |= DLM_LKF_CONVERT;
- lp->lkf &= ~DLM_LKF_CONVDEADLK;
-
- log_debug("rereq %x,%llx id %x %d,%d",
- lp->lockname.ln_type,
- (unsigned long long)lp->lockname.ln_number,
- lp->lksb.sb_lkid, lp->cur, lp->req);
-
- set_bit(LFL_REREQUEST, &lp->flags);
- queue_submit(lp);
- return;
- }
-
- /*
- * DLM demoted the lock to NL before it was granted so GFS must be
- * told it cannot cache data for this lock.
- */
-
- if (lp->lksb.sb_flags & DLM_SBF_DEMOTED)
- set_bit(LFL_NOCACHE, &lp->flags);
-
-out:
- /*
- * This is an internal lock_dlm lock
- */
-
- if (test_bit(LFL_INLOCK, &lp->flags)) {
- clear_bit(LFL_NOBLOCK, &lp->flags);
- lp->cur = lp->req;
- wake_up_ast(lp);
- return;
- }
-
- /*
- * Normal completion of a lock request. Tell GFS it now has the lock.
- */
-
- clear_bit(LFL_NOBLOCK, &lp->flags);
- lp->cur = lp->req;
-
- acb.lc_name = lp->lockname;
- acb.lc_ret |= gdlm_make_lmstate(lp->cur);
-
- ls->fscb(ls->sdp, LM_CB_ASYNC, &acb);
-}
-
-static void gdlm_ast(void *astarg)
-{
- struct gdlm_lock *lp = astarg;
- clear_bit(LFL_ACTIVE, &lp->flags);
- process_complete(lp);
-}
-
-static void process_blocking(struct gdlm_lock *lp, int bast_mode)
-{
- struct gdlm_ls *ls = lp->ls;
- unsigned int cb = 0;
-
- switch (gdlm_make_lmstate(bast_mode)) {
- case LM_ST_EXCLUSIVE:
- cb = LM_CB_NEED_E;
- break;
- case LM_ST_DEFERRED:
- cb = LM_CB_NEED_D;
- break;
- case LM_ST_SHARED:
- cb = LM_CB_NEED_S;
- break;
- default:
- gdlm_assert(0, "unknown bast mode %u", bast_mode);
- }
-
- ls->fscb(ls->sdp, cb, &lp->lockname);
-}
-
-
-static void gdlm_bast(void *astarg, int mode)
-{
- struct gdlm_lock *lp = astarg;
-
- if (!mode) {
- printk(KERN_INFO "lock_dlm: bast mode zero %x,%llx\n",
- lp->lockname.ln_type,
- (unsigned long long)lp->lockname.ln_number);
- return;
- }
-
- process_blocking(lp, mode);
-}
-
-/* convert gfs lock-state to dlm lock-mode */
-
-static s16 make_mode(s16 lmstate)
-{
- switch (lmstate) {
- case LM_ST_UNLOCKED:
- return DLM_LOCK_NL;
- case LM_ST_EXCLUSIVE:
- return DLM_LOCK_EX;
- case LM_ST_DEFERRED:
- return DLM_LOCK_CW;
- case LM_ST_SHARED:
- return DLM_LOCK_PR;
- }
- gdlm_assert(0, "unknown LM state %d", lmstate);
- return -1;
-}
-
-
-/* verify agreement with GFS on the current lock state, NB: DLM_LOCK_NL and
- DLM_LOCK_IV are both considered LM_ST_UNLOCKED by GFS. */
-
-static void check_cur_state(struct gdlm_lock *lp, unsigned int cur_state)
-{
- s16 cur = make_mode(cur_state);
- if (lp->cur != DLM_LOCK_IV)
- gdlm_assert(lp->cur == cur, "%d, %d", lp->cur, cur);
-}
-
-static inline unsigned int make_flags(struct gdlm_lock *lp,
- unsigned int gfs_flags,
- s16 cur, s16 req)
-{
- unsigned int lkf = 0;
-
- if (gfs_flags & LM_FLAG_TRY)
- lkf |= DLM_LKF_NOQUEUE;
-
- if (gfs_flags & LM_FLAG_TRY_1CB) {
- lkf |= DLM_LKF_NOQUEUE;
- lkf |= DLM_LKF_NOQUEUEBAST;
- }
-
- if (gfs_flags & LM_FLAG_PRIORITY) {
- lkf |= DLM_LKF_NOORDER;
- lkf |= DLM_LKF_HEADQUE;
- }
-
- if (gfs_flags & LM_FLAG_ANY) {
- if (req == DLM_LOCK_PR)
- lkf |= DLM_LKF_ALTCW;
- else if (req == DLM_LOCK_CW)
- lkf |= DLM_LKF_ALTPR;
- }
-
- if (lp->lksb.sb_lkid != 0) {
- lkf |= DLM_LKF_CONVERT;
- }
-
- if (lp->lvb)
- lkf |= DLM_LKF_VALBLK;
-
- return lkf;
-}
-
-/* make_strname - convert GFS lock numbers to a string */
-
-static inline void make_strname(const struct lm_lockname *lockname,
- struct gdlm_strname *str)
-{
- sprintf(str->name, "%8x%16llx", lockname->ln_type,
- (unsigned long long)lockname->ln_number);
- str->namelen = GDLM_STRNAME_BYTES;
-}
-
-static int gdlm_create_lp(struct gdlm_ls *ls, struct lm_lockname *name,
- struct gdlm_lock **lpp)
-{
- struct gdlm_lock *lp;
-
- lp = kzalloc(sizeof(struct gdlm_lock), GFP_NOFS);
- if (!lp)
- return -ENOMEM;
-
- lp->lockname = *name;
- make_strname(name, &lp->strname);
- lp->ls = ls;
- lp->cur = DLM_LOCK_IV;
- INIT_LIST_HEAD(&lp->delay_list);
-
- spin_lock(&ls->async_lock);
- ls->all_locks_count++;
- spin_unlock(&ls->async_lock);
-
- *lpp = lp;
- return 0;
-}
-
-int gdlm_get_lock(void *lockspace, struct lm_lockname *name,
- void **lockp)
-{
- struct gdlm_lock *lp;
- int error;
-
- error = gdlm_create_lp(lockspace, name, &lp);
-
- *lockp = lp;
- return error;
-}
-
-void gdlm_put_lock(void *lock)
-{
- gdlm_delete_lp(lock);
-}
-
-unsigned int gdlm_do_lock(struct gdlm_lock *lp)
-{
- struct gdlm_ls *ls = lp->ls;
- int error, bast = 1;
-
- /*
- * When recovery is in progress, delay lock requests for submission
- * once recovery is done. Requests for recovery (NOEXP) and unlocks
- * can pass.
- */
-
- if (test_bit(DFL_BLOCK_LOCKS, &ls->flags) &&
- !test_bit(LFL_NOBLOCK, &lp->flags) && lp->req != DLM_LOCK_NL) {
- gdlm_queue_delayed(lp);
- return LM_OUT_ASYNC;
- }
-
- /*
- * Submit the actual lock request.
- */
-
- if (test_bit(LFL_NOBAST, &lp->flags))
- bast = 0;
-
- set_bit(LFL_ACTIVE, &lp->flags);
-
- log_debug("lk %x,%llx id %x %d,%d %x", lp->lockname.ln_type,
- (unsigned long long)lp->lockname.ln_number, lp->lksb.sb_lkid,
- lp->cur, lp->req, lp->lkf);
-
- error = dlm_lock(ls->dlm_lockspace, lp->req, &lp->lksb, lp->lkf,
- lp->strname.name, lp->strname.namelen, 0, gdlm_ast,
- lp, bast ? gdlm_bast : NULL);
-
- if ((error == -EAGAIN) && (lp->lkf & DLM_LKF_NOQUEUE)) {
- lp->lksb.sb_status = -EAGAIN;
- gdlm_ast(lp);
- error = 0;
- }
-
- if (error) {
- log_error("%s: gdlm_lock %x,%llx err=%d cur=%d req=%d lkf=%x "
- "flags=%lx", ls->fsname, lp->lockname.ln_type,
- (unsigned long long)lp->lockname.ln_number, error,
- lp->cur, lp->req, lp->lkf, lp->flags);
- return LM_OUT_ERROR;
- }
- return LM_OUT_ASYNC;
-}
-
-static unsigned int gdlm_do_unlock(struct gdlm_lock *lp)
-{
- struct gdlm_ls *ls = lp->ls;
- unsigned int lkf = 0;
- int error;
-
- set_bit(LFL_DLM_UNLOCK, &lp->flags);
- set_bit(LFL_ACTIVE, &lp->flags);
-
- if (lp->lvb)
- lkf = DLM_LKF_VALBLK;
-
- log_debug("un %x,%llx %x %d %x", lp->lockname.ln_type,
- (unsigned long long)lp->lockname.ln_number,
- lp->lksb.sb_lkid, lp->cur, lkf);
-
- error = dlm_unlock(ls->dlm_lockspace, lp->lksb.sb_lkid, lkf, NULL, lp);
-
- if (error) {
- log_error("%s: gdlm_unlock %x,%llx err=%d cur=%d req=%d lkf=%x "
- "flags=%lx", ls->fsname, lp->lockname.ln_type,
- (unsigned long long)lp->lockname.ln_number, error,
- lp->cur, lp->req, lp->lkf, lp->flags);
- return LM_OUT_ERROR;
- }
- return LM_OUT_ASYNC;
-}
-
-unsigned int gdlm_lock(void *lock, unsigned int cur_state,
- unsigned int req_state, unsigned int flags)
-{
- struct gdlm_lock *lp = lock;
-
- if (req_state == LM_ST_UNLOCKED)
- return gdlm_unlock(lock, cur_state);
-
- if (req_state == LM_ST_UNLOCKED)
- return gdlm_unlock(lock, cur_state);
-
- clear_bit(LFL_DLM_CANCEL, &lp->flags);
- if (flags & LM_FLAG_NOEXP)
- set_bit(LFL_NOBLOCK, &lp->flags);
-
- check_cur_state(lp, cur_state);
- lp->req = make_mode(req_state);
- lp->lkf = make_flags(lp, flags, lp->cur, lp->req);
-
- return gdlm_do_lock(lp);
-}
-
-unsigned int gdlm_unlock(void *lock, unsigned int cur_state)
-{
- struct gdlm_lock *lp = lock;
-
- clear_bit(LFL_DLM_CANCEL, &lp->flags);
- if (lp->cur == DLM_LOCK_IV)
- return 0;
- return gdlm_do_unlock(lp);
-}
-
-void gdlm_cancel(void *lock)
-{
- struct gdlm_lock *lp = lock;
- struct gdlm_ls *ls = lp->ls;
- int error, delay_list = 0;
-
- if (test_bit(LFL_DLM_CANCEL, &lp->flags))
- return;
-
- log_info("gdlm_cancel %x,%llx flags %lx", lp->lockname.ln_type,
- (unsigned long long)lp->lockname.ln_number, lp->flags);
-
- spin_lock(&ls->async_lock);
- if (!list_empty(&lp->delay_list)) {
- list_del_init(&lp->delay_list);
- delay_list = 1;
- }
- spin_unlock(&ls->async_lock);
-
- if (delay_list) {
- set_bit(LFL_CANCEL, &lp->flags);
- set_bit(LFL_ACTIVE, &lp->flags);
- gdlm_ast(lp);
- return;
- }
-
- if (!test_bit(LFL_ACTIVE, &lp->flags) ||
- test_bit(LFL_DLM_UNLOCK, &lp->flags)) {
- log_info("gdlm_cancel skip %x,%llx flags %lx",
- lp->lockname.ln_type,
- (unsigned long long)lp->lockname.ln_number, lp->flags);
- return;
- }
-
- /* the lock is blocked in the dlm */
-
- set_bit(LFL_DLM_CANCEL, &lp->flags);
- set_bit(LFL_ACTIVE, &lp->flags);
-
- error = dlm_unlock(ls->dlm_lockspace, lp->lksb.sb_lkid, DLM_LKF_CANCEL,
- NULL, lp);
-
- log_info("gdlm_cancel rv %d %x,%llx flags %lx", error,
- lp->lockname.ln_type,
- (unsigned long long)lp->lockname.ln_number, lp->flags);
-
- if (error == -EBUSY)
- clear_bit(LFL_DLM_CANCEL, &lp->flags);
-}
-
-static int gdlm_add_lvb(struct gdlm_lock *lp)
-{
- char *lvb;
-
- lvb = kzalloc(GDLM_LVB_SIZE, GFP_NOFS);
- if (!lvb)
- return -ENOMEM;
-
- lp->lksb.sb_lvbptr = lvb;
- lp->lvb = lvb;
- return 0;
-}
-
-static void gdlm_del_lvb(struct gdlm_lock *lp)
-{
- kfree(lp->lvb);
- lp->lvb = NULL;
- lp->lksb.sb_lvbptr = NULL;
-}
-
-static int gdlm_ast_wait(void *word)
-{
- schedule();
- return 0;
-}
-
-/* This can do a synchronous dlm request (requiring a lock_dlm thread to get
- the completion) because gfs won't call hold_lvb() during a callback (from
- the context of a lock_dlm thread). */
-
-static int hold_null_lock(struct gdlm_lock *lp)
-{
- struct gdlm_lock *lpn = NULL;
- int error;
-
- if (lp->hold_null) {
- printk(KERN_INFO "lock_dlm: lvb already held\n");
- return 0;
- }
-
- error = gdlm_create_lp(lp->ls, &lp->lockname, &lpn);
- if (error)
- goto out;
-
- lpn->lksb.sb_lvbptr = junk_lvb;
- lpn->lvb = junk_lvb;
-
- lpn->req = DLM_LOCK_NL;
- lpn->lkf = DLM_LKF_VALBLK | DLM_LKF_EXPEDITE;
- set_bit(LFL_NOBAST, &lpn->flags);
- set_bit(LFL_INLOCK, &lpn->flags);
- set_bit(LFL_AST_WAIT, &lpn->flags);
-
- gdlm_do_lock(lpn);
- wait_on_bit(&lpn->flags, LFL_AST_WAIT, gdlm_ast_wait, TASK_UNINTERRUPTIBLE);
- error = lpn->lksb.sb_status;
- if (error) {
- printk(KERN_INFO "lock_dlm: hold_null_lock dlm error %d\n",
- error);
- gdlm_delete_lp(lpn);
- lpn = NULL;
- }
-out:
- lp->hold_null = lpn;
- return error;
-}
-
-/* This cannot do a synchronous dlm request (requiring a lock_dlm thread to get
- the completion) because gfs may call unhold_lvb() during a callback (from
- the context of a lock_dlm thread) which could cause a deadlock since the
- other lock_dlm thread could be engaged in recovery. */
-
-static void unhold_null_lock(struct gdlm_lock *lp)
-{
- struct gdlm_lock *lpn = lp->hold_null;
-
- gdlm_assert(lpn, "%x,%llx", lp->lockname.ln_type,
- (unsigned long long)lp->lockname.ln_number);
- lpn->lksb.sb_lvbptr = NULL;
- lpn->lvb = NULL;
- set_bit(LFL_UNLOCK_DELETE, &lpn->flags);
- gdlm_do_unlock(lpn);
- lp->hold_null = NULL;
-}
-
-/* Acquire a NL lock because gfs requires the value block to remain
- intact on the resource while the lvb is "held" even if it's holding no locks
- on the resource. */
-
-int gdlm_hold_lvb(void *lock, char **lvbp)
-{
- struct gdlm_lock *lp = lock;
- int error;
-
- error = gdlm_add_lvb(lp);
- if (error)
- return error;
-
- *lvbp = lp->lvb;
-
- error = hold_null_lock(lp);
- if (error)
- gdlm_del_lvb(lp);
-
- return error;
-}
-
-void gdlm_unhold_lvb(void *lock, char *lvb)
-{
- struct gdlm_lock *lp = lock;
-
- unhold_null_lock(lp);
- gdlm_del_lvb(lp);
-}
-
-void gdlm_submit_delayed(struct gdlm_ls *ls)
-{
- struct gdlm_lock *lp, *safe;
-
- spin_lock(&ls->async_lock);
- list_for_each_entry_safe(lp, safe, &ls->delayed, delay_list) {
- list_del_init(&lp->delay_list);
- list_add_tail(&lp->delay_list, &ls->submit);
- }
- spin_unlock(&ls->async_lock);
- wake_up(&ls->thread_wait);
-}
-
diff --git a/fs/gfs2/locking/dlm/lock_dlm.h b/fs/gfs2/locking/dlm/lock_dlm.h
deleted file mode 100644
index 3c98e7c..0000000
--- a/fs/gfs2/locking/dlm/lock_dlm.h
+++ /dev/null
@@ -1,166 +0,0 @@
-/*
- * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
- * Copyright (C) 2004-2005 Red Hat, Inc. All rights reserved.
- *
- * This copyrighted material is made available to anyone wishing to use,
- * modify, copy, or redistribute it subject to the terms and conditions
- * of the GNU General Public License version 2.
- */
-
-#ifndef LOCK_DLM_DOT_H
-#define LOCK_DLM_DOT_H
-
-#include <linux/module.h>
-#include <linux/slab.h>
-#include <linux/spinlock.h>
-#include <linux/types.h>
-#include <linux/string.h>
-#include <linux/list.h>
-#include <linux/socket.h>
-#include <linux/delay.h>
-#include <linux/kthread.h>
-#include <linux/kobject.h>
-#include <linux/fcntl.h>
-#include <linux/wait.h>
-#include <net/sock.h>
-
-#include <linux/dlm.h>
-#include <linux/dlm_plock.h>
-#include <linux/lm_interface.h>
-
-/*
- * Internally, we prefix things with gdlm_ and GDLM_ (for gfs-dlm) since a
- * prefix of lock_dlm_ gets awkward. Externally, GFS refers to this module
- * as "lock_dlm".
- */
-
-#define GDLM_STRNAME_BYTES 24
-#define GDLM_LVB_SIZE 32
-#define GDLM_DROP_COUNT 0
-#define GDLM_DROP_PERIOD 60
-#define GDLM_NAME_LEN 128
-
-/* GFS uses 12 bytes to identify a resource (32 bit type + 64 bit number).
- We sprintf these numbers into a 24 byte string of hex values to make them
- human-readable (to make debugging simpler.) */
-
-struct gdlm_strname {
- unsigned char name[GDLM_STRNAME_BYTES];
- unsigned short namelen;
-};
-
-enum {
- DFL_BLOCK_LOCKS = 0,
- DFL_SPECTATOR = 1,
- DFL_WITHDRAW = 2,
-};
-
-struct gdlm_ls {
- u32 id;
- int jid;
- int first;
- int first_done;
- unsigned long flags;
- struct kobject kobj;
- char clustername[GDLM_NAME_LEN];
- char fsname[GDLM_NAME_LEN];
- int fsflags;
- dlm_lockspace_t *dlm_lockspace;
- lm_callback_t fscb;
- struct gfs2_sbd *sdp;
- int recover_jid;
- int recover_jid_done;
- int recover_jid_status;
- spinlock_t async_lock;
- struct list_head delayed;
- struct list_head submit;
- u32 all_locks_count;
- wait_queue_head_t wait_control;
- struct task_struct *thread;
- wait_queue_head_t thread_wait;
-};
-
-enum {
- LFL_NOBLOCK = 0,
- LFL_NOCACHE = 1,
- LFL_DLM_UNLOCK = 2,
- LFL_DLM_CANCEL = 3,
- LFL_SYNC_LVB = 4,
- LFL_FORCE_PROMOTE = 5,
- LFL_REREQUEST = 6,
- LFL_ACTIVE = 7,
- LFL_INLOCK = 8,
- LFL_CANCEL = 9,
- LFL_NOBAST = 10,
- LFL_HEADQUE = 11,
- LFL_UNLOCK_DELETE = 12,
- LFL_AST_WAIT = 13,
-};
-
-struct gdlm_lock {
- struct gdlm_ls *ls;
- struct lm_lockname lockname;
- struct gdlm_strname strname;
- char *lvb;
- struct dlm_lksb lksb;
-
- s16 cur;
- s16 req;
- s16 prev_req;
- u32 lkf; /* dlm flags DLM_LKF_ */
- unsigned long flags; /* lock_dlm flags LFL_ */
-
- struct list_head delay_list; /* delayed */
- struct gdlm_lock *hold_null; /* NL lock for hold_lvb */
-};
-
-#define gdlm_assert(assertion, fmt, args...) \
-do { \
- if (unlikely(!(assertion))) { \
- printk(KERN_EMERG "lock_dlm: fatal assertion failed \"%s\"\n" \
- "lock_dlm: " fmt "\n", \
- #assertion, ##args); \
- BUG(); \
- } \
-} while (0)
-
-#define log_print(lev, fmt, arg...) printk(lev "lock_dlm: " fmt "\n" , ## arg)
-#define log_info(fmt, arg...) log_print(KERN_INFO , fmt , ## arg)
-#define log_error(fmt, arg...) log_print(KERN_ERR , fmt , ## arg)
-#ifdef LOCK_DLM_LOG_DEBUG
-#define log_debug(fmt, arg...) log_print(KERN_DEBUG , fmt , ## arg)
-#else
-#define log_debug(fmt, arg...)
-#endif
-
-/* sysfs.c */
-
-int gdlm_sysfs_init(void);
-void gdlm_sysfs_exit(void);
-int gdlm_kobject_setup(struct gdlm_ls *, struct kobject *);
-void gdlm_kobject_release(struct gdlm_ls *);
-
-/* thread.c */
-
-int gdlm_init_threads(struct gdlm_ls *);
-void gdlm_release_threads(struct gdlm_ls *);
-
-/* lock.c */
-
-void gdlm_submit_delayed(struct gdlm_ls *);
-unsigned int gdlm_do_lock(struct gdlm_lock *);
-
-int gdlm_get_lock(void *, struct lm_lockname *, void **);
-void gdlm_put_lock(void *);
-unsigned int gdlm_lock(void *, unsigned int, unsigned int, unsigned int);
-unsigned int gdlm_unlock(void *, unsigned int);
-void gdlm_cancel(void *);
-int gdlm_hold_lvb(void *, char **);
-void gdlm_unhold_lvb(void *, char *);
-
-/* mount.c */
-
-extern const struct lm_lockops gdlm_ops;
-
-#endif
-
diff --git a/fs/gfs2/locking/dlm/main.c b/fs/gfs2/locking/dlm/main.c
deleted file mode 100644
index b9a03a7..0000000
--- a/fs/gfs2/locking/dlm/main.c
+++ /dev/null
@@ -1,48 +0,0 @@
-/*
- * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
- * Copyright (C) 2004-2005 Red Hat, Inc. All rights reserved.
- *
- * This copyrighted material is made available to anyone wishing to use,
- * modify, copy, or redistribute it subject to the terms and conditions
- * of the GNU General Public License version 2.
- */
-
-#include <linux/init.h>
-
-#include "lock_dlm.h"
-
-static int __init init_lock_dlm(void)
-{
- int error;
-
- error = gfs2_register_lockproto(&gdlm_ops);
- if (error) {
- printk(KERN_WARNING "lock_dlm: can't register protocol: %d\n",
- error);
- return error;
- }
-
- error = gdlm_sysfs_init();
- if (error) {
- gfs2_unregister_lockproto(&gdlm_ops);
- return error;
- }
-
- printk(KERN_INFO
- "Lock_DLM (built %s %s) installed\n", __DATE__, __TIME__);
- return 0;
-}
-
-static void __exit exit_lock_dlm(void)
-{
- gdlm_sysfs_exit();
- gfs2_unregister_lockproto(&gdlm_ops);
-}
-
-module_init(init_lock_dlm);
-module_exit(exit_lock_dlm);
-
-MODULE_DESCRIPTION("GFS DLM Locking Module");
-MODULE_AUTHOR("Red Hat, Inc.");
-MODULE_LICENSE("GPL");
-
diff --git a/fs/gfs2/locking/dlm/mount.c b/fs/gfs2/locking/dlm/mount.c
deleted file mode 100644
index 1aa7eb6..0000000
--- a/fs/gfs2/locking/dlm/mount.c
+++ /dev/null
@@ -1,276 +0,0 @@
-/*
- * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
- * Copyright (C) 2004-2005 Red Hat, Inc. All rights reserved.
- *
- * This copyrighted material is made available to anyone wishing to use,
- * modify, copy, or redistribute it subject to the terms and conditions
- * of the GNU General Public License version 2.
- */
-
-#include "lock_dlm.h"
-
-const struct lm_lockops gdlm_ops;
-
-
-static struct gdlm_ls *init_gdlm(lm_callback_t cb, struct gfs2_sbd *sdp,
- int flags, char *table_name)
-{
- struct gdlm_ls *ls;
- char buf[256], *p;
-
- ls = kzalloc(sizeof(struct gdlm_ls), GFP_KERNEL);
- if (!ls)
- return NULL;
-
- ls->fscb = cb;
- ls->sdp = sdp;
- ls->fsflags = flags;
- spin_lock_init(&ls->async_lock);
- INIT_LIST_HEAD(&ls->delayed);
- INIT_LIST_HEAD(&ls->submit);
- init_waitqueue_head(&ls->thread_wait);
- init_waitqueue_head(&ls->wait_control);
- ls->jid = -1;
-
- strncpy(buf, table_name, 256);
- buf[255] = '\0';
-
- p = strchr(buf, ':');
- if (!p) {
- log_info("invalid table_name \"%s\"", table_name);
- kfree(ls);
- return NULL;
- }
- *p = '\0';
- p++;
-
- strncpy(ls->clustername, buf, GDLM_NAME_LEN);
- strncpy(ls->fsname, p, GDLM_NAME_LEN);
-
- return ls;
-}
-
-static int make_args(struct gdlm_ls *ls, char *data_arg, int *nodir)
-{
- char data[256];
- char *options, *x, *y;
- int error = 0;
-
- memset(data, 0, 256);
- strncpy(data, data_arg, 255);
-
- if (!strlen(data)) {
- log_error("no mount options, (u)mount helpers not installed");
- return -EINVAL;
- }
-
- for (options = data; (x = strsep(&options, ":")); ) {
- if (!*x)
- continue;
-
- y = strchr(x, '=');
- if (y)
- *y++ = 0;
-
- if (!strcmp(x, "jid")) {
- if (!y) {
- log_error("need argument to jid");
- error = -EINVAL;
- break;
- }
- sscanf(y, "%u", &ls->jid);
-
- } else if (!strcmp(x, "first")) {
- if (!y) {
- log_error("need argument to first");
- error = -EINVAL;
- break;
- }
- sscanf(y, "%u", &ls->first);
-
- } else if (!strcmp(x, "id")) {
- if (!y) {
- log_error("need argument to id");
- error = -EINVAL;
- break;
- }
- sscanf(y, "%u", &ls->id);
-
- } else if (!strcmp(x, "nodir")) {
- if (!y) {
- log_error("need argument to nodir");
- error = -EINVAL;
- break;
- }
- sscanf(y, "%u", nodir);
-
- } else {
- log_error("unkonwn option: %s", x);
- error = -EINVAL;
- break;
- }
- }
-
- return error;
-}
-
-static int gdlm_mount(char *table_name, char *host_data,
- lm_callback_t cb, void *cb_data,
- unsigned int min_lvb_size, int flags,
- struct lm_lockstruct *lockstruct,
- struct kobject *fskobj)
-{
- struct gdlm_ls *ls;
- int error = -ENOMEM, nodir = 0;
-
- if (min_lvb_size > GDLM_LVB_SIZE)
- goto out;
-
- ls = init_gdlm(cb, cb_data, flags, table_name);
- if (!ls)
- goto out;
-
- error = make_args(ls, host_data, &nodir);
- if (error)
- goto out;
-
- error = gdlm_init_threads(ls);
- if (error)
- goto out_free;
-
- error = gdlm_kobject_setup(ls, fskobj);
- if (error)
- goto out_thread;
-
- error = dlm_new_lockspace(ls->fsname, strlen(ls->fsname),
- &ls->dlm_lockspace,
- DLM_LSFL_FS | DLM_LSFL_NEWEXCL |
- (nodir ? DLM_LSFL_NODIR : 0),
- GDLM_LVB_SIZE);
- if (error) {
- log_error("dlm_new_lockspace error %d", error);
- goto out_kobj;
- }
-
- lockstruct->ls_jid = ls->jid;
- lockstruct->ls_first = ls->first;
- lockstruct->ls_lockspace = ls;
- lockstruct->ls_ops = &gdlm_ops;
- lockstruct->ls_flags = 0;
- lockstruct->ls_lvb_size = GDLM_LVB_SIZE;
- return 0;
-
-out_kobj:
- gdlm_kobject_release(ls);
-out_thread:
- gdlm_release_threads(ls);
-out_free:
- kfree(ls);
-out:
- return error;
-}
-
-static void gdlm_unmount(void *lockspace)
-{
- struct gdlm_ls *ls = lockspace;
-
- log_debug("unmount flags %lx", ls->flags);
-
- /* FIXME: serialize unmount and withdraw in case they
- happen at once. Also, if unmount follows withdraw,
- wait for withdraw to finish. */
-
- if (test_bit(DFL_WITHDRAW, &ls->flags))
- goto out;
-
- gdlm_kobject_release(ls);
- dlm_release_lockspace(ls->dlm_lockspace, 2);
- gdlm_release_threads(ls);
- BUG_ON(ls->all_locks_count);
-out:
- kfree(ls);
-}
-
-static void gdlm_recovery_done(void *lockspace, unsigned int jid,
- unsigned int message)
-{
- char env_jid[20];
- char env_status[20];
- char *envp[] = { env_jid, env_status, NULL };
- struct gdlm_ls *ls = lockspace;
- ls->recover_jid_done = jid;
- ls->recover_jid_status = message;
- sprintf(env_jid, "JID=%d", jid);
- sprintf(env_status, "RECOVERY=%s",
- message == LM_RD_SUCCESS ? "Done" : "Failed");
- kobject_uevent_env(&ls->kobj, KOBJ_CHANGE, envp);
-}
-
-static void gdlm_others_may_mount(void *lockspace)
-{
- char *message = "FIRSTMOUNT=Done";
- char *envp[] = { message, NULL };
- struct gdlm_ls *ls = lockspace;
- ls->first_done = 1;
- kobject_uevent_env(&ls->kobj, KOBJ_CHANGE, envp);
-}
-
-/* Userspace gets the offline uevent, blocks new gfs locks on
- other mounters, and lets us know (sets WITHDRAW flag). Then,
- userspace leaves the mount group while we leave the lockspace. */
-
-static void gdlm_withdraw(void *lockspace)
-{
- struct gdlm_ls *ls = lockspace;
-
- kobject_uevent(&ls->kobj, KOBJ_OFFLINE);
-
- wait_event_interruptible(ls->wait_control,
- test_bit(DFL_WITHDRAW, &ls->flags));
-
- dlm_release_lockspace(ls->dlm_lockspace, 2);
- gdlm_release_threads(ls);
- gdlm_kobject_release(ls);
-}
-
-static int gdlm_plock(void *lockspace, struct lm_lockname *name,
- struct file *file, int cmd, struct file_lock *fl)
-{
- struct gdlm_ls *ls = lockspace;
- return dlm_posix_lock(ls->dlm_lockspace, name->ln_number, file, cmd, fl);
-}
-
-static int gdlm_punlock(void *lockspace, struct lm_lockname *name,
- struct file *file, struct file_lock *fl)
-{
- struct gdlm_ls *ls = lockspace;
- return dlm_posix_unlock(ls->dlm_lockspace, name->ln_number, file, fl);
-}
-
-static int gdlm_plock_get(void *lockspace, struct lm_lockname *name,
- struct file *file, struct file_lock *fl)
-{
- struct gdlm_ls *ls = lockspace;
- return dlm_posix_get(ls->dlm_lockspace, name->ln_number, file, fl);
-}
-
-const struct lm_lockops gdlm_ops = {
- .lm_proto_name = "lock_dlm",
- .lm_mount = gdlm_mount,
- .lm_others_may_mount = gdlm_others_may_mount,
- .lm_unmount = gdlm_unmount,
- .lm_withdraw = gdlm_withdraw,
- .lm_get_lock = gdlm_get_lock,
- .lm_put_lock = gdlm_put_lock,
- .lm_lock = gdlm_lock,
- .lm_unlock = gdlm_unlock,
- .lm_plock = gdlm_plock,
- .lm_punlock = gdlm_punlock,
- .lm_plock_get = gdlm_plock_get,
- .lm_cancel = gdlm_cancel,
- .lm_hold_lvb = gdlm_hold_lvb,
- .lm_unhold_lvb = gdlm_unhold_lvb,
- .lm_recovery_done = gdlm_recovery_done,
- .lm_owner = THIS_MODULE,
-};
-
diff --git a/fs/gfs2/locking/dlm/sysfs.c b/fs/gfs2/locking/dlm/sysfs.c
deleted file mode 100644
index 9b7edcf..0000000
--- a/fs/gfs2/locking/dlm/sysfs.c
+++ /dev/null
@@ -1,226 +0,0 @@
-/*
- * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
- * Copyright (C) 2004-2005 Red Hat, Inc. All rights reserved.
- *
- * This copyrighted material is made available to anyone wishing to use,
- * modify, copy, or redistribute it subject to the terms and conditions
- * of the GNU General Public License version 2.
- */
-
-#include <linux/ctype.h>
-#include <linux/stat.h>
-
-#include "lock_dlm.h"
-
-static ssize_t proto_name_show(struct gdlm_ls *ls, char *buf)
-{
- return sprintf(buf, "%s\n", gdlm_ops.lm_proto_name);
-}
-
-static ssize_t block_show(struct gdlm_ls *ls, char *buf)
-{
- ssize_t ret;
- int val = 0;
-
- if (test_bit(DFL_BLOCK_LOCKS, &ls->flags))
- val = 1;
- ret = sprintf(buf, "%d\n", val);
- return ret;
-}
-
-static ssize_t block_store(struct gdlm_ls *ls, const char *buf, size_t len)
-{
- ssize_t ret = len;
- int val;
-
- val = simple_strtol(buf, NULL, 0);
-
- if (val == 1)
- set_bit(DFL_BLOCK_LOCKS, &ls->flags);
- else if (val == 0) {
- clear_bit(DFL_BLOCK_LOCKS, &ls->flags);
- gdlm_submit_delayed(ls);
- } else {
- ret = -EINVAL;
- }
- return ret;
-}
-
-static ssize_t withdraw_show(struct gdlm_ls *ls, char *buf)
-{
- ssize_t ret;
- int val = 0;
-
- if (test_bit(DFL_WITHDRAW, &ls->flags))
- val = 1;
- ret = sprintf(buf, "%d\n", val);
- return ret;
-}
-
-static ssize_t withdraw_store(struct gdlm_ls *ls, const char *buf, size_t len)
-{
- ssize_t ret = len;
- int val;
-
- val = simple_strtol(buf, NULL, 0);
-
- if (val == 1)
- set_bit(DFL_WITHDRAW, &ls->flags);
- else
- ret = -EINVAL;
- wake_up(&ls->wait_control);
- return ret;
-}
-
-static ssize_t id_show(struct gdlm_ls *ls, char *buf)
-{
- return sprintf(buf, "%u\n", ls->id);
-}
-
-static ssize_t jid_show(struct gdlm_ls *ls, char *buf)
-{
- return sprintf(buf, "%d\n", ls->jid);
-}
-
-static ssize_t first_show(struct gdlm_ls *ls, char *buf)
-{
- return sprintf(buf, "%d\n", ls->first);
-}
-
-static ssize_t first_done_show(struct gdlm_ls *ls, char *buf)
-{
- return sprintf(buf, "%d\n", ls->first_done);
-}
-
-static ssize_t recover_show(struct gdlm_ls *ls, char *buf)
-{
- return sprintf(buf, "%d\n", ls->recover_jid);
-}
-
-static ssize_t recover_store(struct gdlm_ls *ls, const char *buf, size_t len)
-{
- ls->recover_jid = simple_strtol(buf, NULL, 0);
- ls->fscb(ls->sdp, LM_CB_NEED_RECOVERY, &ls->recover_jid);
- return len;
-}
-
-static ssize_t recover_done_show(struct gdlm_ls *ls, char *buf)
-{
- return sprintf(buf, "%d\n", ls->recover_jid_done);
-}
-
-static ssize_t recover_status_show(struct gdlm_ls *ls, char *buf)
-{
- return sprintf(buf, "%d\n", ls->recover_jid_status);
-}
-
-struct gdlm_attr {
- struct attribute attr;
- ssize_t (*show)(struct gdlm_ls *, char *);
- ssize_t (*store)(struct gdlm_ls *, const char *, size_t);
-};
-
-#define GDLM_ATTR(_name,_mode,_show,_store) \
-static struct gdlm_attr gdlm_attr_##_name = __ATTR(_name,_mode,_show,_store)
-
-GDLM_ATTR(proto_name, 0444, proto_name_show, NULL);
-GDLM_ATTR(block, 0644, block_show, block_store);
-GDLM_ATTR(withdraw, 0644, withdraw_show, withdraw_store);
-GDLM_ATTR(id, 0444, id_show, NULL);
-GDLM_ATTR(jid, 0444, jid_show, NULL);
-GDLM_ATTR(first, 0444, first_show, NULL);
-GDLM_ATTR(first_done, 0444, first_done_show, NULL);
-GDLM_ATTR(recover, 0644, recover_show, recover_store);
-GDLM_ATTR(recover_done, 0444, recover_done_show, NULL);
-GDLM_ATTR(recover_status, 0444, recover_status_show, NULL);
-
-static struct attribute *gdlm_attrs[] = {
- &gdlm_attr_proto_name.attr,
- &gdlm_attr_block.attr,
- &gdlm_attr_withdraw.attr,
- &gdlm_attr_id.attr,
- &gdlm_attr_jid.attr,
- &gdlm_attr_first.attr,
- &gdlm_attr_first_done.attr,
- &gdlm_attr_recover.attr,
- &gdlm_attr_recover_done.attr,
- &gdlm_attr_recover_status.attr,
- NULL,
-};
-
-static ssize_t gdlm_attr_show(struct kobject *kobj, struct attribute *attr,
- char *buf)
-{
- struct gdlm_ls *ls = container_of(kobj, struct gdlm_ls, kobj);
- struct gdlm_attr *a = container_of(attr, struct gdlm_attr, attr);
- return a->show ? a->show(ls, buf) : 0;
-}
-
-static ssize_t gdlm_attr_store(struct kobject *kobj, struct attribute *attr,
- const char *buf, size_t len)
-{
- struct gdlm_ls *ls = container_of(kobj, struct gdlm_ls, kobj);
- struct gdlm_attr *a = container_of(attr, struct gdlm_attr, attr);
- return a->store ? a->store(ls, buf, len) : len;
-}
-
-static struct sysfs_ops gdlm_attr_ops = {
- .show = gdlm_attr_show,
- .store = gdlm_attr_store,
-};
-
-static struct kobj_type gdlm_ktype = {
- .default_attrs = gdlm_attrs,
- .sysfs_ops = &gdlm_attr_ops,
-};
-
-static struct kset *gdlm_kset;
-
-int gdlm_kobject_setup(struct gdlm_ls *ls, struct kobject *fskobj)
-{
- int error;
-
- ls->kobj.kset = gdlm_kset;
- error = kobject_init_and_add(&ls->kobj, &gdlm_ktype, fskobj,
- "lock_module");
- if (error)
- log_error("can't register kobj %d", error);
- kobject_uevent(&ls->kobj, KOBJ_ADD);
-
- return error;
-}
-
-void gdlm_kobject_release(struct gdlm_ls *ls)
-{
- kobject_put(&ls->kobj);
-}
-
-static int gdlm_uevent(struct kset *kset, struct kobject *kobj,
- struct kobj_uevent_env *env)
-{
- struct gdlm_ls *ls = container_of(kobj, struct gdlm_ls, kobj);
- add_uevent_var(env, "LOCKTABLE=%s:%s", ls->clustername, ls->fsname);
- add_uevent_var(env, "LOCKPROTO=lock_dlm");
- return 0;
-}
-
-static struct kset_uevent_ops gdlm_uevent_ops = {
- .uevent = gdlm_uevent,
-};
-
-
-int gdlm_sysfs_init(void)
-{
- gdlm_kset = kset_create_and_add("lock_dlm", &gdlm_uevent_ops, kernel_kobj);
- if (!gdlm_kset) {
- printk(KERN_WARNING "%s: can not create kset\n", __func__);
- return -ENOMEM;
- }
- return 0;
-}
-
-void gdlm_sysfs_exit(void)
-{
- kset_unregister(gdlm_kset);
-}
-
diff --git a/fs/gfs2/locking/dlm/thread.c b/fs/gfs2/locking/dlm/thread.c
deleted file mode 100644
index 38823ef..0000000
--- a/fs/gfs2/locking/dlm/thread.c
+++ /dev/null
@@ -1,68 +0,0 @@
-/*
- * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
- * Copyright (C) 2004-2005 Red Hat, Inc. All rights reserved.
- *
- * This copyrighted material is made available to anyone wishing to use,
- * modify, copy, or redistribute it subject to the terms and conditions
- * of the GNU General Public License version 2.
- */
-
-#include "lock_dlm.h"
-
-static inline int no_work(struct gdlm_ls *ls)
-{
- int ret;
-
- spin_lock(&ls->async_lock);
- ret = list_empty(&ls->submit);
- spin_unlock(&ls->async_lock);
-
- return ret;
-}
-
-static int gdlm_thread(void *data)
-{
- struct gdlm_ls *ls = (struct gdlm_ls *) data;
- struct gdlm_lock *lp = NULL;
-
- while (!kthread_should_stop()) {
- wait_event_interruptible(ls->thread_wait,
- !no_work(ls) || kthread_should_stop());
-
- spin_lock(&ls->async_lock);
-
- if (!list_empty(&ls->submit)) {
- lp = list_entry(ls->submit.next, struct gdlm_lock,
- delay_list);
- list_del_init(&lp->delay_list);
- spin_unlock(&ls->async_lock);
- gdlm_do_lock(lp);
- spin_lock(&ls->async_lock);
- }
- spin_unlock(&ls->async_lock);
- }
-
- return 0;
-}
-
-int gdlm_init_threads(struct gdlm_ls *ls)
-{
- struct task_struct *p;
- int error;
-
- p = kthread_run(gdlm_thread, ls, "lock_dlm");
- error = IS_ERR(p);
- if (error) {
- log_error("can't start lock_dlm thread %d", error);
- return error;
- }
- ls->thread = p;
-
- return 0;
-}
-
-void gdlm_release_threads(struct gdlm_ls *ls)
-{
- kthread_stop(ls->thread);
-}
-