1 files changed, 0 insertions, 407 deletions
diff --git a/ANDROID_3.4.5/drivers/md/persistent-data/dm-transaction-manager.c b/ANDROID_3.4.5/drivers/md/persistent-data/dm-transaction-manager.c
deleted file mode 100644
index ba54aacf..00000000
--- a/ANDROID_3.4.5/drivers/md/persistent-data/dm-transaction-manager.c
+++ /dev/null
@@ -1,407 +0,0 @@
-/*
- * Copyright (C) 2011 Red Hat, Inc.
- *
- * This file is released under the GPL.
- */
-#include "dm-transaction-manager.h"
-#include "dm-space-map.h"
-#include "dm-space-map-checker.h"
-#include "dm-space-map-disk.h"
-#include "dm-space-map-metadata.h"
-#include "dm-persistent-data-internal.h"
-
-#include <linux/export.h>
-#include <linux/slab.h>
-#include <linux/device-mapper.h>
-
-#define DM_MSG_PREFIX "transaction manager"
-
-/*----------------------------------------------------------------*/
-
-struct shadow_info {
-	struct hlist_node hlist;
-	dm_block_t where;
-};
-
-/*
- * It would be nice if we scaled with the size of transaction.
- */
-#define HASH_SIZE 256
-#define HASH_MASK (HASH_SIZE - 1)
-
-struct dm_transaction_manager {
-	int is_clone;
-	struct dm_transaction_manager *real;
-
-	struct dm_block_manager *bm;
-	struct dm_space_map *sm;
-
-	spinlock_t lock;
-	struct hlist_head buckets[HASH_SIZE];
-};
-
-/*----------------------------------------------------------------*/
-
-static int is_shadow(struct dm_transaction_manager *tm, dm_block_t b)
-{
-	int r = 0;
-	unsigned bucket = dm_hash_block(b, HASH_MASK);
-	struct shadow_info *si;
-	struct hlist_node *n;
-
-	spin_lock(&tm->lock);
-	hlist_for_each_entry(si, n, tm->buckets + bucket, hlist)
-		if (si->where == b) {
-			r = 1;
-			break;
-		}
-	spin_unlock(&tm->lock);
-
-	return r;
-}
-
-/*
- * This can silently fail if there's no memory.  We're ok with this since
- * creating redundant shadows causes no harm.
- */
-static void insert_shadow(struct dm_transaction_manager *tm, dm_block_t b)
-{
-	unsigned bucket;
-	struct shadow_info *si;
-
-	si = kmalloc(sizeof(*si), GFP_NOIO);
-	if (si) {
-		si->where = b;
-		bucket = dm_hash_block(b, HASH_MASK);
-		spin_lock(&tm->lock);
-		hlist_add_head(&si->hlist, tm->buckets + bucket);
-		spin_unlock(&tm->lock);
-	}
-}
-
-static void wipe_shadow_table(struct dm_transaction_manager *tm)
-{
-	struct shadow_info *si;
-	struct hlist_node *n, *tmp;
-	struct hlist_head *bucket;
-	int i;
-
-	spin_lock(&tm->lock);
-	for (i = 0; i < HASH_SIZE; i++) {
-		bucket = tm->buckets + i;
-		hlist_for_each_entry_safe(si, n, tmp, bucket, hlist)
-			kfree(si);
-
-		INIT_HLIST_HEAD(bucket);
-	}
-
-	spin_unlock(&tm->lock);
-}
-
-/*----------------------------------------------------------------*/
-
-static struct dm_transaction_manager *dm_tm_create(struct dm_block_manager *bm,
-						   struct dm_space_map *sm)
-{
-	int i;
-	struct dm_transaction_manager *tm;
-
-	tm = kmalloc(sizeof(*tm), GFP_KERNEL);
-	if (!tm)
-		return ERR_PTR(-ENOMEM);
-
-	tm->is_clone = 0;
-	tm->real = NULL;
-	tm->bm = bm;
-	tm->sm = sm;
-
-	spin_lock_init(&tm->lock);
-	for (i = 0; i < HASH_SIZE; i++)
-		INIT_HLIST_HEAD(tm->buckets + i);
-
-	return tm;
-}
-
-struct dm_transaction_manager *dm_tm_create_non_blocking_clone(struct dm_transaction_manager *real)
-{
-	struct dm_transaction_manager *tm;
-
-	tm = kmalloc(sizeof(*tm), GFP_KERNEL);
-	if (tm) {
-		tm->is_clone = 1;
-		tm->real = real;
-	}
-
-	return tm;
-}
-EXPORT_SYMBOL_GPL(dm_tm_create_non_blocking_clone);
-
-void dm_tm_destroy(struct dm_transaction_manager *tm)
-{
-	if (!tm->is_clone)
-		wipe_shadow_table(tm);
-
-	kfree(tm);
-}
-EXPORT_SYMBOL_GPL(dm_tm_destroy);
-
-int dm_tm_pre_commit(struct dm_transaction_manager *tm)
-{
-	int r;
-
-	if (tm->is_clone)
-		return -EWOULDBLOCK;
-
-	r = dm_sm_commit(tm->sm);
-	if (r < 0)
-		return r;
-
-	return 0;
-}
-EXPORT_SYMBOL_GPL(dm_tm_pre_commit);
-
-int dm_tm_commit(struct dm_transaction_manager *tm, struct dm_block *root)
-{
-	if (tm->is_clone)
-		return -EWOULDBLOCK;
-
-	wipe_shadow_table(tm);
-
-	return dm_bm_flush_and_unlock(tm->bm, root);
-}
-EXPORT_SYMBOL_GPL(dm_tm_commit);
-
-int dm_tm_new_block(struct dm_transaction_manager *tm,
-		    struct dm_block_validator *v,
-		    struct dm_block **result)
-{
-	int r;
-	dm_block_t new_block;
-
-	if (tm->is_clone)
-		return -EWOULDBLOCK;
-
-	r = dm_sm_new_block(tm->sm, &new_block);
-	if (r < 0)
-		return r;
-
-	r = dm_bm_write_lock_zero(tm->bm, new_block, v, result);
-	if (r < 0) {
-		dm_sm_dec_block(tm->sm, new_block);
-		return r;
-	}
-
-	/*
-	 * New blocks count as shadows in that they don't need to be
-	 * shadowed again.
-	 */
-	insert_shadow(tm, new_block);
-
-	return 0;
-}
-
-static int __shadow_block(struct dm_transaction_manager *tm, dm_block_t orig,
-			  struct dm_block_validator *v,
-			  struct dm_block **result)
-{
-	int r;
-	dm_block_t new;
-	struct dm_block *orig_block;
-
-	r = dm_sm_new_block(tm->sm, &new);
-	if (r < 0)
-		return r;
-
-	r = dm_sm_dec_block(tm->sm, orig);
-	if (r < 0)
-		return r;
-
-	r = dm_bm_read_lock(tm->bm, orig, v, &orig_block);
-	if (r < 0)
-		return r;
-
-	r = dm_bm_unlock_move(orig_block, new);
-	if (r < 0) {
-		dm_bm_unlock(orig_block);
-		return r;
-	}
-
-	return dm_bm_write_lock(tm->bm, new, v, result);
-}
-
-int dm_tm_shadow_block(struct dm_transaction_manager *tm, dm_block_t orig,
-		       struct dm_block_validator *v, struct dm_block **result,
-		       int *inc_children)
-{
-	int r;
-
-	if (tm->is_clone)
-		return -EWOULDBLOCK;
-
-	r = dm_sm_count_is_more_than_one(tm->sm, orig, inc_children);
-	if (r < 0)
-		return r;
-
-	if (is_shadow(tm, orig) && !*inc_children)
-		return dm_bm_write_lock(tm->bm, orig, v, result);
-
-	r = __shadow_block(tm, orig, v, result);
-	if (r < 0)
-		return r;
-	insert_shadow(tm, dm_block_location(*result));
-
-	return r;
-}
-
-int dm_tm_read_lock(struct dm_transaction_manager *tm, dm_block_t b,
-		    struct dm_block_validator *v,
-		    struct dm_block **blk)
-{
-	if (tm->is_clone)
-		return dm_bm_read_try_lock(tm->real->bm, b, v, blk);
-
-	return dm_bm_read_lock(tm->bm, b, v, blk);
-}
-
-int dm_tm_unlock(struct dm_transaction_manager *tm, struct dm_block *b)
-{
-	return dm_bm_unlock(b);
-}
-EXPORT_SYMBOL_GPL(dm_tm_unlock);
-
-void dm_tm_inc(struct dm_transaction_manager *tm, dm_block_t b)
-{
-	/*
-	 * The non-blocking clone doesn't support this.
-	 */
-	BUG_ON(tm->is_clone);
-
-	dm_sm_inc_block(tm->sm, b);
-}
-EXPORT_SYMBOL_GPL(dm_tm_inc);
-
-void dm_tm_dec(struct dm_transaction_manager *tm, dm_block_t b)
-{
-	/*
-	 * The non-blocking clone doesn't support this.
-	 */
-	BUG_ON(tm->is_clone);
-
-	dm_sm_dec_block(tm->sm, b);
-}
-EXPORT_SYMBOL_GPL(dm_tm_dec);
-
-int dm_tm_ref(struct dm_transaction_manager *tm, dm_block_t b,
-	      uint32_t *result)
-{
-	if (tm->is_clone)
-		return -EWOULDBLOCK;
-
-	return dm_sm_get_count(tm->sm, b, result);
-}
-
-struct dm_block_manager *dm_tm_get_bm(struct dm_transaction_manager *tm)
-{
-	return tm->bm;
-}
-
-/*----------------------------------------------------------------*/
-
-static int dm_tm_create_internal(struct dm_block_manager *bm,
-				 dm_block_t sb_location,
-				 struct dm_block_validator *sb_validator,
-				 size_t root_offset, size_t root_max_len,
-				 struct dm_transaction_manager **tm,
-				 struct dm_space_map **sm,
-				 struct dm_block **sblock,
-				 int create)
-{
-	int r;
-	struct dm_space_map *inner;
-
-	inner = dm_sm_metadata_init();
-	if (IS_ERR(inner))
-		return PTR_ERR(inner);
-
-	*tm = dm_tm_create(bm, inner);
-	if (IS_ERR(*tm)) {
-		dm_sm_destroy(inner);
-		return PTR_ERR(*tm);
-	}
-
-	if (create) {
-		r = dm_bm_write_lock_zero(dm_tm_get_bm(*tm), sb_location,
-					  sb_validator, sblock);
-		if (r < 0) {
-			DMERR("couldn't lock superblock");
-			goto bad1;
-		}
-
-		r = dm_sm_metadata_create(inner, *tm, dm_bm_nr_blocks(bm),
-					  sb_location);
-		if (r) {
-			DMERR("couldn't create metadata space map");
-			goto bad2;
-		}
-
-		*sm = dm_sm_checker_create(inner);
-		if (IS_ERR(*sm)) {
-			r = PTR_ERR(*sm);
-			goto bad2;
-		}
-
-	} else {
-		r = dm_bm_write_lock(dm_tm_get_bm(*tm), sb_location,
-				     sb_validator, sblock);
-		if (r < 0) {
-			DMERR("couldn't lock superblock");
-			goto bad1;
-		}
-
-		r = dm_sm_metadata_open(inner, *tm,
-					dm_block_data(*sblock) + root_offset,
-					root_max_len);
-		if (r) {
-			DMERR("couldn't open metadata space map");
-			goto bad2;
-		}
-
-		*sm = dm_sm_checker_create(inner);
-		if (IS_ERR(*sm)) {
-			r = PTR_ERR(*sm);
-			goto bad2;
-		}
-	}
-
-	return 0;
-
-bad2:
-	dm_tm_unlock(*tm, *sblock);
-bad1:
-	dm_tm_destroy(*tm);
-	dm_sm_destroy(inner);
-	return r;
-}
-
-int dm_tm_create_with_sm(struct dm_block_manager *bm, dm_block_t sb_location,
-			 struct dm_block_validator *sb_validator,
-			 struct dm_transaction_manager **tm,
-			 struct dm_space_map **sm, struct dm_block **sblock)
-{
-	return dm_tm_create_internal(bm, sb_location, sb_validator,
-				     0, 0, tm, sm, sblock, 1);
-}
-EXPORT_SYMBOL_GPL(dm_tm_create_with_sm);
-
-int dm_tm_open_with_sm(struct dm_block_manager *bm, dm_block_t sb_location,
-		       struct dm_block_validator *sb_validator,
-		       size_t root_offset, size_t root_max_len,
-		       struct dm_transaction_manager **tm,
-		       struct dm_space_map **sm, struct dm_block **sblock)
-{
-	return dm_tm_create_internal(bm, sb_location, sb_validator, root_offset,
-				     root_max_len, tm, sm, sblock, 0);
-}
-EXPORT_SYMBOL_GPL(dm_tm_open_with_sm);
-
-/*----------------------------------------------------------------*/