1 files changed, 0 insertions, 818 deletions

diff --git a/ANDROID_3.4.5/drivers/md/dm-log-userspace-base.c b/ANDROID_3.4.5/drivers/md/dm-log-userspace-base.c
deleted file mode 100644
index 9429159d..00000000
--- a/ANDROID_3.4.5/drivers/md/dm-log-userspace-base.c
+++ /dev/null
@@ -1,818 +0,0 @@
-/*
- * Copyright (C) 2006-2009 Red Hat, Inc.
- *
- * This file is released under the LGPL.
- */
-
-#include <linux/bio.h>
-#include <linux/slab.h>
-#include <linux/dm-dirty-log.h>
-#include <linux/device-mapper.h>
-#include <linux/dm-log-userspace.h>
-#include <linux/module.h>
-
-#include "dm-log-userspace-transfer.h"
-
-#define DM_LOG_USERSPACE_VSN "1.1.0"
-
-struct flush_entry {
-	int type;
-	region_t region;
-	struct list_head list;
-};
-
-/*
- * This limit on the number of mark and clear request is, to a degree,
- * arbitrary.  However, there is some basis for the choice in the limits
- * imposed on the size of data payload by dm-log-userspace-transfer.c:
- * dm_consult_userspace().
- */
-#define MAX_FLUSH_GROUP_COUNT 32
-
-struct log_c {
-	struct dm_target *ti;
-	struct dm_dev *log_dev;
-	uint32_t region_size;
-	region_t region_count;
-	uint64_t luid;
-	char uuid[DM_UUID_LEN];
-
-	char *usr_argv_str;
-	uint32_t usr_argc;
-
-	/*
-	 * in_sync_hint gets set when doing is_remote_recovering.  It
-	 * represents the first region that needs recovery.  IOW, the
-	 * first zero bit of sync_bits.  This can be useful for to limit
-	 * traffic for calls like is_remote_recovering and get_resync_work,
-	 * but be take care in its use for anything else.
-	 */
-	uint64_t in_sync_hint;
-
-	/*
-	 * Mark and clear requests are held until a flush is issued
-	 * so that we can group, and thereby limit, the amount of
-	 * network traffic between kernel and userspace.  The 'flush_lock'
-	 * is used to protect these lists.
-	 */
-	spinlock_t flush_lock;
-	struct list_head mark_list;
-	struct list_head clear_list;
-};
-
-static mempool_t *flush_entry_pool;
-
-static void *flush_entry_alloc(gfp_t gfp_mask, void *pool_data)
-{
-	return kmalloc(sizeof(struct flush_entry), gfp_mask);
-}
-
-static void flush_entry_free(void *element, void *pool_data)
-{
-	kfree(element);
-}
-
-static int userspace_do_request(struct log_c *lc, const char *uuid,
-				int request_type, char *data, size_t data_size,
-				char *rdata, size_t *rdata_size)
-{
-	int r;
-
-	/*
-	 * If the server isn't there, -ESRCH is returned,
-	 * and we must keep trying until the server is
-	 * restored.
-	 */
-retry:
-	r = dm_consult_userspace(uuid, lc->luid, request_type, data,
-				 data_size, rdata, rdata_size);
-
-	if (r != -ESRCH)
-		return r;
-
-	DMERR(" Userspace log server not found.");
-	while (1) {
-		set_current_state(TASK_INTERRUPTIBLE);
-		schedule_timeout(2*HZ);
-		DMWARN("Attempting to contact userspace log server...");
-		r = dm_consult_userspace(uuid, lc->luid, DM_ULOG_CTR,
-					 lc->usr_argv_str,
-					 strlen(lc->usr_argv_str) + 1,
-					 NULL, NULL);
-		if (!r)
-			break;
-	}
-	DMINFO("Reconnected to userspace log server... DM_ULOG_CTR complete");
-	r = dm_consult_userspace(uuid, lc->luid, DM_ULOG_RESUME, NULL,
-				 0, NULL, NULL);
-	if (!r)
-		goto retry;
-
-	DMERR("Error trying to resume userspace log: %d", r);
-
-	return -ESRCH;
-}
-
-static int build_constructor_string(struct dm_target *ti,
-				    unsigned argc, char **argv,
-				    char **ctr_str)
-{
-	int i, str_size;
-	char *str = NULL;
-
-	*ctr_str = NULL;
-
-	for (i = 0, str_size = 0; i < argc; i++)
-		str_size += strlen(argv[i]) + 1; /* +1 for space between args */
-
-	str_size += 20; /* Max number of chars in a printed u64 number */
-
-	str = kzalloc(str_size, GFP_KERNEL);
-	if (!str) {
-		DMWARN("Unable to allocate memory for constructor string");
-		return -ENOMEM;
-	}
-
-	str_size = sprintf(str, "%llu", (unsigned long long)ti->len);
-	for (i = 0; i < argc; i++)
-		str_size += sprintf(str + str_size, " %s", argv[i]);
-
-	*ctr_str = str;
-	return str_size;
-}
-
-/*
- * userspace_ctr
- *
- * argv contains:
- *	<UUID> <other args>
- * Where 'other args' is the userspace implementation specific log
- * arguments.  An example might be:
- *	<UUID> clustered-disk <arg count> <log dev> <region_size> [[no]sync]
- *
- * So, this module will strip off the <UUID> for identification purposes
- * when communicating with userspace about a log; but will pass on everything
- * else.
- */
-static int userspace_ctr(struct dm_dirty_log *log, struct dm_target *ti,
-			 unsigned argc, char **argv)
-{
-	int r = 0;
-	int str_size;
-	char *ctr_str = NULL;
-	struct log_c *lc = NULL;
-	uint64_t rdata;
-	size_t rdata_size = sizeof(rdata);
-	char *devices_rdata = NULL;
-	size_t devices_rdata_size = DM_NAME_LEN;
-
-	if (argc < 3) {
-		DMWARN("Too few arguments to userspace dirty log");
-		return -EINVAL;
-	}
-
-	lc = kzalloc(sizeof(*lc), GFP_KERNEL);
-	if (!lc) {
-		DMWARN("Unable to allocate userspace log context.");
-		return -ENOMEM;
-	}
-
-	/* The ptr value is sufficient for local unique id */
-	lc->luid = (unsigned long)lc;
-
-	lc->ti = ti;
-
-	if (strlen(argv[0]) > (DM_UUID_LEN - 1)) {
-		DMWARN("UUID argument too long.");
-		kfree(lc);
-		return -EINVAL;
-	}
-
-	strncpy(lc->uuid, argv[0], DM_UUID_LEN);
-	spin_lock_init(&lc->flush_lock);
-	INIT_LIST_HEAD(&lc->mark_list);
-	INIT_LIST_HEAD(&lc->clear_list);
-
-	str_size = build_constructor_string(ti, argc - 1, argv + 1, &ctr_str);
-	if (str_size < 0) {
-		kfree(lc);
-		return str_size;
-	}
-
-	devices_rdata = kzalloc(devices_rdata_size, GFP_KERNEL);
-	if (!devices_rdata) {
-		DMERR("Failed to allocate memory for device information");
-		r = -ENOMEM;
-		goto out;
-	}
-
-	/*
-	 * Send table string and get back any opened device.
-	 */
-	r = dm_consult_userspace(lc->uuid, lc->luid, DM_ULOG_CTR,
-				 ctr_str, str_size,
-				 devices_rdata, &devices_rdata_size);
-
-	if (r < 0) {
-		if (r == -ESRCH)
-			DMERR("Userspace log server not found");
-		else
-			DMERR("Userspace log server failed to create log");
-		goto out;
-	}
-
-	/* Since the region size does not change, get it now */
-	rdata_size = sizeof(rdata);
-	r = dm_consult_userspace(lc->uuid, lc->luid, DM_ULOG_GET_REGION_SIZE,
-				 NULL, 0, (char *)&rdata, &rdata_size);
-
-	if (r) {
-		DMERR("Failed to get region size of dirty log");
-		goto out;
-	}
-
-	lc->region_size = (uint32_t)rdata;
-	lc->region_count = dm_sector_div_up(ti->len, lc->region_size);
-
-	if (devices_rdata_size) {
-		if (devices_rdata[devices_rdata_size - 1] != '\0') {
-			DMERR("DM_ULOG_CTR device return string not properly terminated");
-			r = -EINVAL;
-			goto out;
-		}
-		r = dm_get_device(ti, devices_rdata,
-				  dm_table_get_mode(ti->table), &lc->log_dev);
-		if (r)
-			DMERR("Failed to register %s with device-mapper",
-			      devices_rdata);
-	}
-out:
-	kfree(devices_rdata);
-	if (r) {
-		kfree(lc);
-		kfree(ctr_str);
-	} else {
-		lc->usr_argv_str = ctr_str;
-		lc->usr_argc = argc;
-		log->context = lc;
-	}
-
-	return r;
-}
-
-static void userspace_dtr(struct dm_dirty_log *log)
-{
-	struct log_c *lc = log->context;
-
-	(void) dm_consult_userspace(lc->uuid, lc->luid, DM_ULOG_DTR,
-				 NULL, 0,
-				 NULL, NULL);
-
-	if (lc->log_dev)
-		dm_put_device(lc->ti, lc->log_dev);
-
-	kfree(lc->usr_argv_str);
-	kfree(lc);
-
-	return;
-}
-
-static int userspace_presuspend(struct dm_dirty_log *log)
-{
-	int r;
-	struct log_c *lc = log->context;
-
-	r = dm_consult_userspace(lc->uuid, lc->luid, DM_ULOG_PRESUSPEND,
-				 NULL, 0,
-				 NULL, NULL);
-
-	return r;
-}
-
-static int userspace_postsuspend(struct dm_dirty_log *log)
-{
-	int r;
-	struct log_c *lc = log->context;
-
-	r = dm_consult_userspace(lc->uuid, lc->luid, DM_ULOG_POSTSUSPEND,
-				 NULL, 0,
-				 NULL, NULL);
-
-	return r;
-}
-
-static int userspace_resume(struct dm_dirty_log *log)
-{
-	int r;
-	struct log_c *lc = log->context;
-
-	lc->in_sync_hint = 0;
-	r = dm_consult_userspace(lc->uuid, lc->luid, DM_ULOG_RESUME,
-				 NULL, 0,
-				 NULL, NULL);
-
-	return r;
-}
-
-static uint32_t userspace_get_region_size(struct dm_dirty_log *log)
-{
-	struct log_c *lc = log->context;
-
-	return lc->region_size;
-}
-
-/*
- * userspace_is_clean
- *
- * Check whether a region is clean.  If there is any sort of
- * failure when consulting the server, we return not clean.
- *
- * Returns: 1 if clean, 0 otherwise
- */
-static int userspace_is_clean(struct dm_dirty_log *log, region_t region)
-{
-	int r;
-	uint64_t region64 = (uint64_t)region;
-	int64_t is_clean;
-	size_t rdata_size;
-	struct log_c *lc = log->context;
-
-	rdata_size = sizeof(is_clean);
-	r = userspace_do_request(lc, lc->uuid, DM_ULOG_IS_CLEAN,
-				 (char *)&region64, sizeof(region64),
-				 (char *)&is_clean, &rdata_size);
-
-	return (r) ? 0 : (int)is_clean;
-}
-
-/*
- * userspace_in_sync
- *
- * Check if the region is in-sync.  If there is any sort
- * of failure when consulting the server, we assume that
- * the region is not in sync.
- *
- * If 'can_block' is set, return immediately
- *
- * Returns: 1 if in-sync, 0 if not-in-sync, -EWOULDBLOCK
- */
-static int userspace_in_sync(struct dm_dirty_log *log, region_t region,
-			     int can_block)
-{
-	int r;
-	uint64_t region64 = region;
-	int64_t in_sync;
-	size_t rdata_size;
-	struct log_c *lc = log->context;
-
-	/*
-	 * We can never respond directly - even if in_sync_hint is
-	 * set.  This is because another machine could see a device
-	 * failure and mark the region out-of-sync.  If we don't go
-	 * to userspace to ask, we might think the region is in-sync
-	 * and allow a read to pick up data that is stale.  (This is
-	 * very unlikely if a device actually fails; but it is very
-	 * likely if a connection to one device from one machine fails.)
-	 *
-	 * There still might be a problem if the mirror caches the region
-	 * state as in-sync... but then this call would not be made.  So,
-	 * that is a mirror problem.
-	 */
-	if (!can_block)
-		return -EWOULDBLOCK;
-
-	rdata_size = sizeof(in_sync);
-	r = userspace_do_request(lc, lc->uuid, DM_ULOG_IN_SYNC,
-				 (char *)&region64, sizeof(region64),
-				 (char *)&in_sync, &rdata_size);
-	return (r) ? 0 : (int)in_sync;
-}
-
-static int flush_one_by_one(struct log_c *lc, struct list_head *flush_list)
-{
-	int r = 0;
-	struct flush_entry *fe;
-
-	list_for_each_entry(fe, flush_list, list) {
-		r = userspace_do_request(lc, lc->uuid, fe->type,
-					 (char *)&fe->region,
-					 sizeof(fe->region),
-					 NULL, NULL);
-		if (r)
-			break;
-	}
-
-	return r;
-}
-
-static int flush_by_group(struct log_c *lc, struct list_head *flush_list)
-{
-	int r = 0;
-	int count;
-	uint32_t type = 0;
-	struct flush_entry *fe, *tmp_fe;
-	LIST_HEAD(tmp_list);
-	uint64_t group[MAX_FLUSH_GROUP_COUNT];
-
-	/*
-	 * Group process the requests
-	 */
-	while (!list_empty(flush_list)) {
-		count = 0;
-
-		list_for_each_entry_safe(fe, tmp_fe, flush_list, list) {
-			group[count] = fe->region;
-			count++;
-
-			list_move(&fe->list, &tmp_list);
-
-			type = fe->type;
-			if (count >= MAX_FLUSH_GROUP_COUNT)
-				break;
-		}
-
-		r = userspace_do_request(lc, lc->uuid, type,
-					 (char *)(group),
-					 count * sizeof(uint64_t),
-					 NULL, NULL);
-		if (r) {
-			/* Group send failed.  Attempt one-by-one. */
-			list_splice_init(&tmp_list, flush_list);
-			r = flush_one_by_one(lc, flush_list);
-			break;
-		}
-	}
-
-	/*
-	 * Must collect flush_entrys that were successfully processed
-	 * as a group so that they will be free'd by the caller.
-	 */
-	list_splice_init(&tmp_list, flush_list);
-
-	return r;
-}
-
-/*
- * userspace_flush
- *
- * This function is ok to block.
- * The flush happens in two stages.  First, it sends all
- * clear/mark requests that are on the list.  Then it
- * tells the server to commit them.  This gives the
- * server a chance to optimise the commit, instead of
- * doing it for every request.
- *
- * Additionally, we could implement another thread that
- * sends the requests up to the server - reducing the
- * load on flush.  Then the flush would have less in
- * the list and be responsible for the finishing commit.
- *
- * Returns: 0 on success, < 0 on failure
- */
-static int userspace_flush(struct dm_dirty_log *log)
-{
-	int r = 0;
-	unsigned long flags;
-	struct log_c *lc = log->context;
-	LIST_HEAD(mark_list);
-	LIST_HEAD(clear_list);
-	struct flush_entry *fe, *tmp_fe;
-
-	spin_lock_irqsave(&lc->flush_lock, flags);
-	list_splice_init(&lc->mark_list, &mark_list);
-	list_splice_init(&lc->clear_list, &clear_list);
-	spin_unlock_irqrestore(&lc->flush_lock, flags);
-
-	if (list_empty(&mark_list) && list_empty(&clear_list))
-		return 0;
-
-	r = flush_by_group(lc, &mark_list);
-	if (r)
-		goto fail;
-
-	r = flush_by_group(lc, &clear_list);
-	if (r)
-		goto fail;
-
-	r = userspace_do_request(lc, lc->uuid, DM_ULOG_FLUSH,
-				 NULL, 0, NULL, NULL);
-
-fail:
-	/*
-	 * We can safely remove these entries, even if failure.
-	 * Calling code will receive an error and will know that
-	 * the log facility has failed.
-	 */
-	list_for_each_entry_safe(fe, tmp_fe, &mark_list, list) {
-		list_del(&fe->list);
-		mempool_free(fe, flush_entry_pool);
-	}
-	list_for_each_entry_safe(fe, tmp_fe, &clear_list, list) {
-		list_del(&fe->list);
-		mempool_free(fe, flush_entry_pool);
-	}
-
-	if (r)
-		dm_table_event(lc->ti->table);
-
-	return r;
-}
-
-/*
- * userspace_mark_region
- *
- * This function should avoid blocking unless absolutely required.
- * (Memory allocation is valid for blocking.)
- */
-static void userspace_mark_region(struct dm_dirty_log *log, region_t region)
-{
-	unsigned long flags;
-	struct log_c *lc = log->context;
-	struct flush_entry *fe;
-
-	/* Wait for an allocation, but _never_ fail */
-	fe = mempool_alloc(flush_entry_pool, GFP_NOIO);
-	BUG_ON(!fe);
-
-	spin_lock_irqsave(&lc->flush_lock, flags);
-	fe->type = DM_ULOG_MARK_REGION;
-	fe->region = region;
-	list_add(&fe->list, &lc->mark_list);
-	spin_unlock_irqrestore(&lc->flush_lock, flags);
-
-	return;
-}
-
-/*
- * userspace_clear_region
- *
- * This function must not block.
- * So, the alloc can't block.  In the worst case, it is ok to
- * fail.  It would simply mean we can't clear the region.
- * Does nothing to current sync context, but does mean
- * the region will be re-sync'ed on a reload of the mirror
- * even though it is in-sync.
- */
-static void userspace_clear_region(struct dm_dirty_log *log, region_t region)
-{
-	unsigned long flags;
-	struct log_c *lc = log->context;
-	struct flush_entry *fe;
-
-	/*
-	 * If we fail to allocate, we skip the clearing of
-	 * the region.  This doesn't hurt us in any way, except
-	 * to cause the region to be resync'ed when the
-	 * device is activated next time.
-	 */
-	fe = mempool_alloc(flush_entry_pool, GFP_ATOMIC);
-	if (!fe) {
-		DMERR("Failed to allocate memory to clear region.");
-		return;
-	}
-
-	spin_lock_irqsave(&lc->flush_lock, flags);
-	fe->type = DM_ULOG_CLEAR_REGION;
-	fe->region = region;
-	list_add(&fe->list, &lc->clear_list);
-	spin_unlock_irqrestore(&lc->flush_lock, flags);
-
-	return;
-}
-
-/*
- * userspace_get_resync_work
- *
- * Get a region that needs recovery.  It is valid to return
- * an error for this function.
- *
- * Returns: 1 if region filled, 0 if no work, <0 on error
- */
-static int userspace_get_resync_work(struct dm_dirty_log *log, region_t *region)
-{
-	int r;
-	size_t rdata_size;
-	struct log_c *lc = log->context;
-	struct {
-		int64_t i; /* 64-bit for mix arch compatibility */
-		region_t r;
-	} pkg;
-
-	if (lc->in_sync_hint >= lc->region_count)
-		return 0;
-
-	rdata_size = sizeof(pkg);
-	r = userspace_do_request(lc, lc->uuid, DM_ULOG_GET_RESYNC_WORK,
-				 NULL, 0,
-				 (char *)&pkg, &rdata_size);
-
-	*region = pkg.r;
-	return (r) ? r : (int)pkg.i;
-}
-
-/*
- * userspace_set_region_sync
- *
- * Set the sync status of a given region.  This function
- * must not fail.
- */
-static void userspace_set_region_sync(struct dm_dirty_log *log,
-				      region_t region, int in_sync)
-{
-	int r;
-	struct log_c *lc = log->context;
-	struct {
-		region_t r;
-		int64_t i;
-	} pkg;
-
-	pkg.r = region;
-	pkg.i = (int64_t)in_sync;
-
-	r = userspace_do_request(lc, lc->uuid, DM_ULOG_SET_REGION_SYNC,
-				 (char *)&pkg, sizeof(pkg),
-				 NULL, NULL);
-
-	/*
-	 * It would be nice to be able to report failures.
-	 * However, it is easy emough to detect and resolve.
-	 */
-	return;
-}
-
-/*
- * userspace_get_sync_count
- *
- * If there is any sort of failure when consulting the server,
- * we assume that the sync count is zero.
- *
- * Returns: sync count on success, 0 on failure
- */
-static region_t userspace_get_sync_count(struct dm_dirty_log *log)
-{
-	int r;
-	size_t rdata_size;
-	uint64_t sync_count;
-	struct log_c *lc = log->context;
-
-	rdata_size = sizeof(sync_count);
-	r = userspace_do_request(lc, lc->uuid, DM_ULOG_GET_SYNC_COUNT,
-				 NULL, 0,
-				 (char *)&sync_count, &rdata_size);
-
-	if (r)
-		return 0;
-
-	if (sync_count >= lc->region_count)
-		lc->in_sync_hint = lc->region_count;
-
-	return (region_t)sync_count;
-}
-
-/*
- * userspace_status
- *
- * Returns: amount of space consumed
- */
-static int userspace_status(struct dm_dirty_log *log, status_type_t status_type,
-			    char *result, unsigned maxlen)
-{
-	int r = 0;
-	char *table_args;
-	size_t sz = (size_t)maxlen;
-	struct log_c *lc = log->context;
-
-	switch (status_type) {
-	case STATUSTYPE_INFO:
-		r = userspace_do_request(lc, lc->uuid, DM_ULOG_STATUS_INFO,
-					 NULL, 0,
-					 result, &sz);
-
-		if (r) {
-			sz = 0;
-			DMEMIT("%s 1 COM_FAILURE", log->type->name);
-		}
-		break;
-	case STATUSTYPE_TABLE:
-		sz = 0;
-		table_args = strchr(lc->usr_argv_str, ' ');
-		BUG_ON(!table_args); /* There will always be a ' ' */
-		table_args++;
-
-		DMEMIT("%s %u %s %s ", log->type->name, lc->usr_argc,
-		       lc->uuid, table_args);
-		break;
-	}
-	return (r) ? 0 : (int)sz;
-}
-
-/*
- * userspace_is_remote_recovering
- *
- * Returns: 1 if region recovering, 0 otherwise
- */
-static int userspace_is_remote_recovering(struct dm_dirty_log *log,
-					  region_t region)
-{
-	int r;
-	uint64_t region64 = region;
-	struct log_c *lc = log->context;
-	static unsigned long long limit;
-	struct {
-		int64_t is_recovering;
-		uint64_t in_sync_hint;
-	} pkg;
-	size_t rdata_size = sizeof(pkg);
-
-	/*
-	 * Once the mirror has been reported to be in-sync,
-	 * it will never again ask for recovery work.  So,
-	 * we can safely say there is not a remote machine
-	 * recovering if the device is in-sync.  (in_sync_hint
-	 * must be reset at resume time.)
-	 */
-	if (region < lc->in_sync_hint)
-		return 0;
-	else if (jiffies < limit)
-		return 1;
-
-	limit = jiffies + (HZ / 4);
-	r = userspace_do_request(lc, lc->uuid, DM_ULOG_IS_REMOTE_RECOVERING,
-				 (char *)&region64, sizeof(region64),
-				 (char *)&pkg, &rdata_size);
-	if (r)
-		return 1;
-
-	lc->in_sync_hint = pkg.in_sync_hint;
-
-	return (int)pkg.is_recovering;
-}
-
-static struct dm_dirty_log_type _userspace_type = {
-	.name = "userspace",
-	.module = THIS_MODULE,
-	.ctr = userspace_ctr,
-	.dtr = userspace_dtr,
-	.presuspend = userspace_presuspend,
-	.postsuspend = userspace_postsuspend,
-	.resume = userspace_resume,
-	.get_region_size = userspace_get_region_size,
-	.is_clean = userspace_is_clean,
-	.in_sync = userspace_in_sync,
-	.flush = userspace_flush,
-	.mark_region = userspace_mark_region,
-	.clear_region = userspace_clear_region,
-	.get_resync_work = userspace_get_resync_work,
-	.set_region_sync = userspace_set_region_sync,
-	.get_sync_count = userspace_get_sync_count,
-	.status = userspace_status,
-	.is_remote_recovering = userspace_is_remote_recovering,
-};
-
-static int __init userspace_dirty_log_init(void)
-{
-	int r = 0;
-
-	flush_entry_pool = mempool_create(100, flush_entry_alloc,
-					  flush_entry_free, NULL);
-
-	if (!flush_entry_pool) {
-		DMWARN("Unable to create flush_entry_pool:  No memory.");
-		return -ENOMEM;
-	}
-
-	r = dm_ulog_tfr_init();
-	if (r) {
-		DMWARN("Unable to initialize userspace log communications");
-		mempool_destroy(flush_entry_pool);
-		return r;
-	}
-
-	r = dm_dirty_log_type_register(&_userspace_type);
-	if (r) {
-		DMWARN("Couldn't register userspace dirty log type");
-		dm_ulog_tfr_exit();
-		mempool_destroy(flush_entry_pool);
-		return r;
-	}
-
-	DMINFO("version " DM_LOG_USERSPACE_VSN " loaded");
-	return 0;
-}
-
-static void __exit userspace_dirty_log_exit(void)
-{
-	dm_dirty_log_type_unregister(&_userspace_type);
-	dm_ulog_tfr_exit();
-	mempool_destroy(flush_entry_pool);
-
-	DMINFO("version " DM_LOG_USERSPACE_VSN " unloaded");
-	return;
-}
-
-module_init(userspace_dirty_log_init);
-module_exit(userspace_dirty_log_exit);
-
-MODULE_DESCRIPTION(DM_NAME " userspace dirty log link");
-MODULE_AUTHOR("Jonathan Brassow <dm-devel@redhat.com>");
-MODULE_LICENSE("GPL");