/*
 * Copyright (C) 2007 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 v2 as published by the Free Software Foundation.
 *
 * 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/sched.h>
#include "ctree.h"
#include "disk-io.h"
#include "print-tree.h"
#include "transaction.h"
#include "locking.h"

/*
 * Defrag all the leaves in a given btree.
 * Read all the leaves and try to get key order to
 * better reflect disk order
 */

int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
			struct btrfs_root *root)
{
	struct btrfs_path *path = NULL;
	struct btrfs_key key;
	int ret = 0;
	int wret;
	int level;
	int next_key_ret = 0;
	u64 last_ret = 0;
	u64 min_trans = 0;

	if (root->fs_info->extent_root == root) {
		/*
		 * there's recursion here right now in the tree locking,
		 * we can't defrag the extent root without deadlock
		 */
		goto out;
	}

	if (!test_bit(BTRFS_ROOT_REF_COWS, &root->state))
		goto out;

	path = btrfs_alloc_path();
	if (!path)
		return -ENOMEM;

	level = btrfs_header_level(root->node);

	if (level == 0)
		goto out;

	if (root->defrag_progress.objectid == 0) {
		struct extent_buffer *root_node;
		u32 nritems;

		root_node = btrfs_lock_root_node(root);
		btrfs_set_lock_blocking(root_node);
		nritems = btrfs_header_nritems(root_node);
		root->defrag_max.objectid = 0;
		/* from above we know this is not a leaf */
		btrfs_node_key_to_cpu(root_node, &root->defrag_max,
				      nritems - 1);
		btrfs_tree_unlock(root_node);
		free_extent_buffer(root_node);
		memset(&key, 0, sizeof(key));
	} else {
		memcpy(&key, &root->defrag_progress, sizeof(key));
	}

	path->keep_locks = 1;

	ret = btrfs_search_forward(root, &key, path, min_trans);
	if (ret < 0)
		goto out;
	if (ret > 0) {
		ret = 0;
		goto out;
	}
	btrfs_release_path(path);
	/*
	 * We don't need a lock on a leaf. btrfs_realloc_node() will lock all
	 * leafs from path->nodes[1], so set lowest_level to 1 to avoid later
	 * a deadlock (attempting to write lock an already write locked leaf).
	 */
	path->lowest_level = 1;
	wret = btrfs_search_slot(trans, root, &key, path, 0, 1);

	if (wret < 0) {
		ret = wret;
		goto out;
	}
	if (!path->nodes[1]) {
		ret = 0;
		goto out;
	}
	/*
	 * The node at level 1 must always be locked when our path has
	 * keep_locks set and lowest_level is 1, regardless of the value of
	 * path->slots[1].
	 */
	BUG_ON(path->locks[1] == 0);
	ret = btrfs_realloc_node(trans, root,
				 path->nodes[1], 0,
				 &last_ret,
				 &root->defrag_progress);
	if (ret) {
		WARN_ON(ret == -EAGAIN);
		goto out;
	}
	/*
	 * Now that we reallocated the node we can find the next key. Note that
	 * btrfs_find_next_key() can release our path and do another search
	 * without COWing, this is because even with path->keep_locks = 1,
	 * btrfs_search_slot() / ctree.c:unlock_up() does not keeps a lock on a
	 * node when path->slots[node_level - 1] does not point to the last
	 * item or a slot beyond the last item (ctree.c:unlock_up()). Therefore
	 * we search for the next key after reallocating our node.
	 */
	path->slots[1] = btrfs_header_nritems(path->nodes[1]);
	next_key_ret = btrfs_find_next_key(root, path, &key, 1,
					   min_trans);
	if (next_key_ret == 0) {
		memcpy(&root->defrag_progress, &key, sizeof(key));
		ret = -EAGAIN;
	}
out:
	btrfs_free_path(path);
	if (ret == -EAGAIN) {
		if (root->defrag_max.objectid > root->defrag_progress.objectid)
			goto done;
		if (root->defrag_max.type > root->defrag_progress.type)
			goto done;
		if (root->defrag_max.offset > root->defrag_progress.offset)
			goto done;
		ret = 0;
	}
done:
	if (ret != -EAGAIN) {
		memset(&root->defrag_progress, 0,
		       sizeof(root->defrag_progress));
		root->defrag_trans_start = trans->transid;
	}
	return ret;
}
b2f92f0ff0a26a6d758ce85167a77d7d1268ca36'>b2f92f0ff0a26a6d758ce85167a77d7d1268ca36</a> (<a href='/cgit.cgi/linux/net-next.git/patch/?id=b2f92f0ff0a26a6d758ce85167a77d7d1268ca36'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=b2f92f0ff0a26a6d758ce85167a77d7d1268ca36'>428966bc786ea57241afb17edd6501b43c2f9d13</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/?id=08f37148b6a915a6996c7dbef87769b9efee2dba'>08f37148b6a915a6996c7dbef87769b9efee2dba</a> (<a href='/cgit.cgi/linux/net-next.git/diff/?id=b2f92f0ff0a26a6d758ce85167a77d7d1268ca36&amp;id2=08f37148b6a915a6996c7dbef87769b9efee2dba'>diff</a>)</td></tr></table>
<div class='commit-subject'>usb: dwc2: use u32 for DT binding parameters</div><div class='commit-msg'>Commit 05ee799f2021 ("usb: dwc2: Move gadget settings into core_params")
changes to type u16 for DT binding "g-rx-fifo-size" and
"g-np-tx-fifo-size" but use type u32 for "g-tx-fifo-size". Finally the
the first two parameters cannot be passed successfully with wrong data
format. This is found the data transferring broken on 96boards Hikey.

This patch is to change all parameters to u32 type, and verified on
Hikey board the DT parameters can pass successfully.

[johnyoun: minor rebase]

Signed-off-by: Leo Yan &lt;leo.yan@linaro.org&gt;
Signed-off-by: John Youn &lt;johnyoun@synopsys.com&gt;
Tested-by: John Stultz &lt;john.stultz@linaro.org&gt;
Signed-off-by: Felipe Balbi &lt;felipe.balbi@linux.intel.com&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=b2f92f0ff0a26a6d758ce85167a77d7d1268ca36'>Diffstat</a></div><table summary='diffstat' class='diffstat'>