1 files changed, 0 insertions, 527 deletions

diff --git a/fs/gfs2/locking/dlm/lock.c b/fs/gfs2/locking/dlm/lock.c
deleted file mode 100644
index 542a797ac89..00000000000
--- a/fs/gfs2/locking/dlm/lock.c
+++ /dev/null
@@ -1,527 +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];
-
-static void queue_complete(struct gdlm_lock *lp)
-{
-	struct gdlm_ls *ls = lp->ls;
-
-	clear_bit(LFL_ACTIVE, &lp->flags);
-
-	spin_lock(&ls->async_lock);
-	list_add_tail(&lp->clist, &ls->complete);
-	spin_unlock(&ls->async_lock);
-	wake_up(&ls->thread_wait);
-}
-
-static inline void gdlm_ast(void *astarg)
-{
-	queue_complete(astarg);
-}
-
-static inline void gdlm_bast(void *astarg, int mode)
-{
-	struct gdlm_lock *lp = astarg;
-	struct gdlm_ls *ls = lp->ls;
-
-	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;
-	}
-
-	spin_lock(&ls->async_lock);
-	if (!lp->bast_mode) {
-		list_add_tail(&lp->blist, &ls->blocking);
-		lp->bast_mode = mode;
-	} else if (lp->bast_mode < mode)
-		lp->bast_mode = mode;
-	spin_unlock(&ls->async_lock);
-	wake_up(&ls->thread_wait);
-}
-
-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);
-}
-
-/* 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;
-}
-
-/* convert dlm lock-mode to gfs lock-state */
-
-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;
-}
-
-/* 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;
-
-		/* Conversion deadlock avoidance by DLM */
-
-		if (!test_bit(LFL_FORCE_PROMOTE, &lp->flags) &&
-		    !(lkf & DLM_LKF_NOQUEUE) &&
-		    cur > DLM_LOCK_NL && req > DLM_LOCK_NL && cur != req)
-			lkf |= DLM_LKF_CONVDEADLK;
-	}
-
-	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_KERNEL);
-	if (!lp)
-		return -ENOMEM;
-
-	lp->lockname = *name;
-	make_strname(name, &lp->strname);
-	lp->ls = ls;
-	lp->cur = DLM_LOCK_IV;
-	lp->lvb = NULL;
-	lp->hold_null = NULL;
-	INIT_LIST_HEAD(&lp->clist);
-	INIT_LIST_HEAD(&lp->blist);
-	INIT_LIST_HEAD(&lp->delay_list);
-
-	spin_lock(&ls->async_lock);
-	list_add(&lp->all_list, &ls->all_locks);
-	ls->all_locks_count++;
-	spin_unlock(&ls->async_lock);
-
-	*lpp = lp;
-	return 0;
-}
-
-void gdlm_delete_lp(struct gdlm_lock *lp)
-{
-	struct gdlm_ls *ls = lp->ls;
-
-	spin_lock(&ls->async_lock);
-	if (!list_empty(&lp->clist))
-		list_del_init(&lp->clist);
-	if (!list_empty(&lp->blist))
-		list_del_init(&lp->blist);
-	if (!list_empty(&lp->delay_list))
-		list_del_init(&lp->delay_list);
-	gdlm_assert(!list_empty(&lp->all_list), "%x,%llx", lp->lockname.ln_type,
-		    (unsigned long long)lp->lockname.ln_number);
-	list_del_init(&lp->all_list);
-	ls->all_locks_count--;
-	spin_unlock(&ls->async_lock);
-
-	kfree(lp);
-}
-
-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;
-		queue_complete(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;
-
-	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);
-		queue_complete(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_KERNEL);
-	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);
-}
-
-int gdlm_release_all_locks(struct gdlm_ls *ls)
-{
-	struct gdlm_lock *lp, *safe;
-	int count = 0;
-
-	spin_lock(&ls->async_lock);
-	list_for_each_entry_safe(lp, safe, &ls->all_locks, all_list) {
-		list_del_init(&lp->all_list);
-
-		if (lp->lvb && lp->lvb != junk_lvb)
-			kfree(lp->lvb);
-		kfree(lp);
-		count++;
-	}
-	spin_unlock(&ls->async_lock);
-
-	return count;
-}
-