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path: root/deploy/dha_adapters/hardware_adapter.py
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###############################################################################
# Copyright (c) 2015 Ericsson AB and others.
# szilard.cserey@ericsson.com
# All rights reserved. This program and the accompanying materials
# are made available under the terms of the Apache License, Version 2.0
# which accompanies this distribution, and is available at
# http://www.apache.org/licenses/LICENSE-2.0
###############################################################################


import yaml
import io


class HardwareAdapter(object):

    def __init__(self, yaml_path):
        self.dha_struct = None
        self.parse_yaml(yaml_path)

    def parse_yaml(self, yaml_path):
        with io.open(yaml_path) as yaml_file:
            self.dha_struct = yaml.load(yaml_file)

    def get_adapter_type(self):
        return self.dha_struct['adapter']

    def get_all_node_ids(self):
        node_ids = []
        for node in self.dha_struct['nodes']:
            node_ids.append(node['id'])
        node_ids.sort()
        return node_ids

    def get_fuel_node_id(self):
        for node in self.dha_struct['nodes']:
            if 'isFuel' in node and node['isFuel']:
                return node['id']

    def get_node_ids(self):
        node_ids = []
        fuel_node_id = self.get_fuel_node_id()
        for node in self.dha_struct['nodes']:
            if node['id'] != fuel_node_id:
                node_ids.append(node['id'])
        node_ids.sort()
        return node_ids

    def get_node_property(self, node_id, property_name):
        for node in self.dha_struct['nodes']:
            if node['id'] == node_id and property_name in node:
                return node[property_name]

    def get_fuel_access(self):
        for node in self.dha_struct['nodes']:
            if 'isFuel' in node and node['isFuel']:
                return node['username'], node['password']

    def get_disks(self):
        return self.dha_struct['disks']
f='#n608'>608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668
/*
 *  linux/fs/hfsplus/bnode.c
 *
 * Copyright (C) 2001
 * Brad Boyer (flar@allandria.com)
 * (C) 2003 Ardis Technologies <roman@ardistech.com>
 *
 * Handle basic btree node operations
 */

#include <linux/string.h>
#include <linux/slab.h>
#include <linux/pagemap.h>
#include <linux/fs.h>
#include <linux/swap.h>

#include "hfsplus_fs.h"
#include "hfsplus_raw.h"

/* Copy a specified range of bytes from the raw data of a node */
void hfs_bnode_read(struct hfs_bnode *node, void *buf, int off, int len)
{
	struct page **pagep;
	int l;

	off += node->page_offset;
	pagep = node->page + (off >> PAGE_CACHE_SHIFT);
	off &= ~PAGE_CACHE_MASK;

	l = min_t(int, len, PAGE_CACHE_SIZE - off);
	memcpy(buf, kmap(*pagep) + off, l);
	kunmap(*pagep);

	while ((len -= l) != 0) {
		buf += l;
		l = min_t(int, len, PAGE_CACHE_SIZE);
		memcpy(buf, kmap(*++pagep), l);
		kunmap(*pagep);
	}
}

u16 hfs_bnode_read_u16(struct hfs_bnode *node, int off)
{
	__be16 data;
	/* TODO: optimize later... */
	hfs_bnode_read(node, &data, off, 2);
	return be16_to_cpu(data);
}

u8 hfs_bnode_read_u8(struct hfs_bnode *node, int off)
{
	u8 data;
	/* TODO: optimize later... */
	hfs_bnode_read(node, &data, off, 1);
	return data;
}

void hfs_bnode_read_key(struct hfs_bnode *node, void *key, int off)
{
	struct hfs_btree *tree;
	int key_len;

	tree = node->tree;
	if (node->type == HFS_NODE_LEAF ||
	    tree->attributes & HFS_TREE_VARIDXKEYS ||
	    node->tree->cnid == HFSPLUS_ATTR_CNID)
		key_len = hfs_bnode_read_u16(node, off) + 2;
	else
		key_len = tree->max_key_len + 2;

	hfs_bnode_read(node, key, off, key_len);
}

void hfs_bnode_write(struct hfs_bnode *node, void *buf, int off, int len)
{
	struct page **pagep;
	int l;

	off += node->page_offset;
	pagep = node->page + (off >> PAGE_CACHE_SHIFT);
	off &= ~PAGE_CACHE_MASK;

	l = min_t(int, len, PAGE_CACHE_SIZE - off);
	memcpy(kmap(*pagep) + off, buf, l);
	set_page_dirty(*pagep);
	kunmap(*pagep);

	while ((len -= l) != 0) {
		buf += l;
		l = min_t(int, len, PAGE_CACHE_SIZE);
		memcpy(kmap(*++pagep), buf, l);
		set_page_dirty(*pagep);
		kunmap(*pagep);
	}
}

void hfs_bnode_write_u16(struct hfs_bnode *node, int off, u16 data)
{
	__be16 v = cpu_to_be16(data);
	/* TODO: optimize later... */
	hfs_bnode_write(node, &v, off, 2);
}

void hfs_bnode_clear(struct hfs_bnode *node, int off, int len)
{
	struct page **pagep;
	int l;

	off += node->page_offset;
	pagep = node->page + (off >> PAGE_CACHE_SHIFT);
	off &= ~PAGE_CACHE_MASK;

	l = min_t(int, len, PAGE_CACHE_SIZE - off);
	memset(kmap(*pagep) + off, 0, l);
	set_page_dirty(*pagep);
	kunmap(*pagep);

	while ((len -= l) != 0) {
		l = min_t(int, len, PAGE_CACHE_SIZE);
		memset(kmap(*++pagep), 0, l);
		set_page_dirty(*pagep);
		kunmap(*pagep);
	}
}

void hfs_bnode_copy(struct hfs_bnode *dst_node, int dst,
		    struct hfs_bnode *src_node, int src, int len)
{
	struct hfs_btree *tree;
	struct page **src_page, **dst_page;
	int l;

	hfs_dbg(BNODE_MOD, "copybytes: %u,%u,%u\n", dst, src, len);
	if (!len)
		return;
	tree = src_node->tree;
	src += src_node->page_offset;
	dst += dst_node->page_offset;
	src_page = src_node->page + (src >> PAGE_CACHE_SHIFT);
	src &= ~PAGE_CACHE_MASK;
	dst_page = dst_node->page + (dst >> PAGE_CACHE_SHIFT);
	dst &= ~PAGE_CACHE_MASK;

	if (src == dst) {
		l = min_t(int, len, PAGE_CACHE_SIZE - src);
		memcpy(kmap(*dst_page) + src, kmap(*src_page) + src, l);
		kunmap(*src_page);
		set_page_dirty(*dst_page);
		kunmap(*dst_page);

		while ((len -= l) != 0) {
			l = min_t(int, len, PAGE_CACHE_SIZE);
			memcpy(kmap(*++dst_page), kmap(*++src_page), l);
			kunmap(*src_page);
			set_page_dirty(*dst_page);
			kunmap(*dst_page);
		}
	} else {
		void *src_ptr, *dst_ptr;

		do {
			src_ptr = kmap(*src_page) + src;
			dst_ptr = kmap(*dst_page) + dst;
			if (PAGE_CACHE_SIZE - src < PAGE_CACHE_SIZE - dst) {
				l = PAGE_CACHE_SIZE - src;
				src = 0;
				dst += l;
			} else {
				l = PAGE_CACHE_SIZE - dst;
				src += l;
				dst = 0;
			}
			l = min(len, l);
			memcpy(dst_ptr, src_ptr, l);
			kunmap(*src_page);
			set_page_dirty(*dst_page);
			kunmap(*dst_page);
			if (!dst)
				dst_page++;
			else
				src_page++;
		} while ((len -= l));
	}
}

void hfs_bnode_move(struct hfs_bnode *node, int dst, int src, int len)
{
	struct page **src_page, **dst_page;
	int l;

	hfs_dbg(BNODE_MOD, "movebytes: %u,%u,%u\n", dst, src, len);
	if (!len)
		return;
	src += node->page_offset;
	dst += node->page_offset;
	if (dst > src) {
		src += len - 1;
		src_page = node->page + (src >> PAGE_CACHE_SHIFT);
		src = (src & ~PAGE_CACHE_MASK) + 1;
		dst += len - 1;
		dst_page = node->page + (dst >> PAGE_CACHE_SHIFT);
		dst = (dst & ~PAGE_CACHE_MASK) + 1;

		if (src == dst) {
			while (src < len) {
				memmove(kmap(*dst_page), kmap(*src_page), src);
				kunmap(*src_page);
				set_page_dirty(*dst_page);
				kunmap(*dst_page);
				len -= src;
				src = PAGE_CACHE_SIZE;
				src_page--;
				dst_page--;
			}
			src -= len;
			memmove(kmap(*dst_page) + src,
				kmap(*src_page) + src, len);
			kunmap(*src_page);
			set_page_dirty(*dst_page);
			kunmap(*dst_page);
		} else {
			void *src_ptr, *dst_ptr;

			do {
				src_ptr = kmap(*src_page) + src;
				dst_ptr = kmap(*dst_page) + dst;
				if (src < dst) {
					l = src;
					src = PAGE_CACHE_SIZE;
					dst -= l;
				} else {
					l = dst;
					src -= l;
					dst = PAGE_CACHE_SIZE;
				}
				l = min(len, l);
				memmove(dst_ptr - l, src_ptr - l, l);
				kunmap(*src_page);
				set_page_dirty(*dst_page);
				kunmap(*dst_page);
				if (dst == PAGE_CACHE_SIZE)
					dst_page--;
				else
					src_page--;
			} while ((len -= l));
		}
	} else {
		src_page = node->page + (src >> PAGE_CACHE_SHIFT);
		src &= ~PAGE_CACHE_MASK;
		dst_page = node->page + (dst >> PAGE_CACHE_SHIFT);
		dst &= ~PAGE_CACHE_MASK;

		if (src == dst) {
			l = min_t(int, len, PAGE_CACHE_SIZE - src);
			memmove(kmap(*dst_page) + src,
				kmap(*src_page) + src, l);
			kunmap(*src_page);
			set_page_dirty(*dst_page);
			kunmap(*dst_page);

			while ((len -= l) != 0) {
				l = min_t(int, len, PAGE_CACHE_SIZE);
				memmove(kmap(*++dst_page),
					kmap(*++src_page), l);
				kunmap(*src_page);
				set_page_dirty(*dst_page);
				kunmap(*dst_page);
			}
		} else {
			void *src_ptr, *dst_ptr;

			do {
				src_ptr = kmap(*src_page) + src;
				dst_ptr = kmap(*dst_page) + dst;
				if (PAGE_CACHE_SIZE - src <
						PAGE_CACHE_SIZE - dst) {
					l = PAGE_CACHE_SIZE - src;
					src = 0;
					dst += l;
				} else {
					l = PAGE_CACHE_SIZE - dst;
					src += l;
					dst = 0;
				}
				l = min(len, l);
				memmove(dst_ptr, src_ptr, l);
				kunmap(*src_page);
				set_page_dirty(*dst_page);
				kunmap(*dst_page);
				if (!dst)
					dst_page++;
				else
					src_page++;
			} while ((len -= l));
		}
	}
}

void hfs_bnode_dump(struct hfs_bnode *node)
{
	struct hfs_bnode_desc desc;
	__be32 cnid;
	int i, off, key_off;

	hfs_dbg(BNODE_MOD, "bnode: %d\n", node->this);
	hfs_bnode_read(node, &desc, 0, sizeof(desc));
	hfs_dbg(BNODE_MOD, "%d, %d, %d, %d, %d\n",
		be32_to_cpu(desc.next), be32_to_cpu(desc.prev),
		desc.type, desc.height, be16_to_cpu(desc.num_recs));

	off = node->tree->node_size - 2;
	for (i = be16_to_cpu(desc.num_recs); i >= 0; off -= 2, i--) {
		key_off = hfs_bnode_read_u16(node, off);
		hfs_dbg(BNODE_MOD, " %d", key_off);
		if (i && node->type == HFS_NODE_INDEX) {
			int tmp;

			if (node->tree->attributes & HFS_TREE_VARIDXKEYS ||
					node->tree->cnid == HFSPLUS_ATTR_CNID)
				tmp = hfs_bnode_read_u16(node, key_off) + 2;
			else
				tmp = node->tree->max_key_len + 2;
			hfs_dbg_cont(BNODE_MOD, " (%d", tmp);
			hfs_bnode_read(node, &cnid, key_off + tmp, 4);
			hfs_dbg_cont(BNODE_MOD, ",%d)", be32_to_cpu(cnid));
		} else if (i && node->type == HFS_NODE_LEAF) {
			int tmp;

			tmp = hfs_bnode_read_u16(node, key_off);
			hfs_dbg_cont(BNODE_MOD, " (%d)", tmp);
		}
	}
	hfs_dbg_cont(BNODE_MOD, "\n");
}

void hfs_bnode_unlink(struct hfs_bnode *node)
{
	struct hfs_btree *tree;
	struct hfs_bnode *tmp;
	__be32 cnid;

	tree = node->tree;
	if (node->prev) {
		tmp = hfs_bnode_find(tree, node->prev);
		if (IS_ERR(tmp))
			return;
		tmp->next = node->next;
		cnid = cpu_to_be32(tmp->next);
		hfs_bnode_write(tmp, &cnid,
			offsetof(struct hfs_bnode_desc, next), 4);
		hfs_bnode_put(tmp);
	} else if (node->type == HFS_NODE_LEAF)
		tree->leaf_head = node->next;

	if (node->next) {
		tmp = hfs_bnode_find(tree, node->next);
		if (IS_ERR(tmp))
			return;
		tmp->prev = node->prev;
		cnid = cpu_to_be32(tmp->prev);
		hfs_bnode_write(tmp, &cnid,
			offsetof(struct hfs_bnode_desc, prev), 4);
		hfs_bnode_put(tmp);
	} else if (node->type == HFS_NODE_LEAF)
		tree->leaf_tail = node->prev;

	/* move down? */
	if (!node->prev && !node->next)
		hfs_dbg(BNODE_MOD, "hfs_btree_del_level\n");
	if (!node->parent) {
		tree->root = 0;
		tree->depth = 0;
	}
	set_bit(HFS_BNODE_DELETED, &node->flags);
}

static inline int hfs_bnode_hash(u32 num)
{
	num = (num >> 16) + num;
	num += num >> 8;
	return num & (NODE_HASH_SIZE - 1);
}

struct hfs_bnode *hfs_bnode_findhash(struct hfs_btree *tree, u32 cnid)
{
	struct hfs_bnode *node;

	if (cnid >= tree->node_count) {
		pr_err("request for non-existent node %d in B*Tree\n",
		       cnid);
		return NULL;
	}

	for (node = tree->node_hash[hfs_bnode_hash(cnid)];
			node; node = node->next_hash)
		if (node->this == cnid)
			return node;
	return NULL;
}

static struct hfs_bnode *__hfs_bnode_create(struct hfs_btree *tree, u32 cnid)
{
	struct super_block *sb;
	struct hfs_bnode *node, *node2;
	struct address_space *mapping;
	struct page *page;
	int size, block, i, hash;
	loff_t off;

	if (cnid >= tree->node_count) {
		pr_err("request for non-existent node %d in B*Tree\n",
		       cnid);
		return NULL;
	}

	sb = tree->inode->i_sb;
	size = sizeof(struct hfs_bnode) + tree->pages_per_bnode *
		sizeof(struct page *);
	node = kzalloc(size, GFP_KERNEL);
	if (!node)
		return NULL;
	node->tree = tree;
	node->this = cnid;
	set_bit(HFS_BNODE_NEW, &node->flags);
	atomic_set(&node->refcnt, 1);
	hfs_dbg(BNODE_REFS, "new_node(%d:%d): 1\n",
		node->tree->cnid, node->this);
	init_waitqueue_head(&node->lock_wq);
	spin_lock(&tree->hash_lock);
	node2 = hfs_bnode_findhash(tree, cnid);
	if (!node2) {
		hash = hfs_bnode_hash(cnid);
		node->next_hash = tree->node_hash[hash];
		tree->node_hash[hash] = node;
		tree->node_hash_cnt++;
	} else {
		spin_unlock(&tree->hash_lock);
		kfree(node);
		wait_event(node2->lock_wq,
			!test_bit(HFS_BNODE_NEW, &node2->flags));
		return node2;
	}
	spin_unlock(&tree->hash_lock);

	mapping = tree->inode->i_mapping;
	off = (loff_t)cnid << tree->node_size_shift;
	block = off >> PAGE_CACHE_SHIFT;
	node->page_offset = off & ~PAGE_CACHE_MASK;
	for (i = 0; i < tree->pages_per_bnode; block++, i++) {
		page = read_mapping_page(mapping, block, NULL);
		if (IS_ERR(page))
			goto fail;
		if (PageError(page)) {
			page_cache_release(page);
			goto fail;
		}
		node->page[i] = page;
	}

	return node;
fail:
	set_bit(HFS_BNODE_ERROR, &node->flags);
	return node;
}

void hfs_bnode_unhash(struct hfs_bnode *node)
{
	struct hfs_bnode **p;

	hfs_dbg(BNODE_REFS, "remove_node(%d:%d): %d\n",
		node->tree->cnid, node->this, atomic_read(&node->refcnt));
	for (p = &node->tree->node_hash[hfs_bnode_hash(node->this)];
	     *p && *p != node; p = &(*p)->next_hash)
		;
	BUG_ON(!*p);
	*p = node->next_hash;
	node->tree->node_hash_cnt--;
}

/* Load a particular node out of a tree */
struct hfs_bnode *hfs_bnode_find(struct hfs_btree *tree, u32 num)
{
	struct hfs_bnode *node;
	struct hfs_bnode_desc *desc;
	int i, rec_off, off, next_off;
	int entry_size, key_size;

	spin_lock(&tree->hash_lock);
	node = hfs_bnode_findhash(tree, num);
	if (node) {
		hfs_bnode_get(node);
		spin_unlock(&tree->hash_lock);
		wait_event(node->lock_wq,
			!test_bit(HFS_BNODE_NEW, &node->flags));
		if (test_bit(HFS_BNODE_ERROR, &node->flags))
			goto node_error;
		return node;
	}
	spin_unlock(&tree->hash_lock);
	node = __hfs_bnode_create(tree, num);
	if (!node)
		return ERR_PTR(-ENOMEM);
	if (test_bit(HFS_BNODE_ERROR, &node->flags))
		goto node_error;
	if (!test_bit(HFS_BNODE_NEW, &node->flags))
		return node;

	desc = (struct hfs_bnode_desc *)(kmap(node->page[0]) +
			node->page_offset);
	node->prev = be32_to_cpu(desc->prev);
	node->next = be32_to_cpu(desc->next);
	node->num_recs = be16_to_cpu(desc->num_recs);
	node->type = desc->type;
	node->height = desc->height;
	kunmap(node->page[0]);

	switch (node->type) {
	case HFS_NODE_HEADER:
	case HFS_NODE_MAP:
		if (node->height != 0)
			goto node_error;
		break;
	case HFS_NODE_LEAF:
		if (node->height != 1)
			goto node_error;
		break;
	case HFS_NODE_INDEX:
		if (node->height <= 1 || node->height > tree->depth)
			goto node_error;
		break;
	default:
		goto node_error;
	}

	rec_off = tree->node_size - 2;
	off = hfs_bnode_read_u16(node, rec_off);
	if (off != sizeof(struct hfs_bnode_desc))
		goto node_error;
	for (i = 1; i <= node->num_recs; off = next_off, i++) {
		rec_off -= 2;
		next_off = hfs_bnode_read_u16(node, rec_off);
		if (next_off <= off ||
		    next_off > tree->node_size ||
		    next_off & 1)
			goto node_error;
		entry_size = next_off - off;
		if (node->type != HFS_NODE_INDEX &&
		    node->type != HFS_NODE_LEAF)
			continue;
		key_size = hfs_bnode_read_u16(node, off) + 2;
		if (key_size >= entry_size || key_size & 1)
			goto node_error;
	}
	clear_bit(HFS_BNODE_NEW, &node->flags);
	wake_up(&node->lock_wq);
	return node;

node_error:
	set_bit(HFS_BNODE_ERROR, &node->flags);
	clear_bit(HFS_BNODE_NEW, &node->flags);
	wake_up(&node->lock_wq);
	hfs_bnode_put(node);
	return ERR_PTR(-EIO);
}

void hfs_bnode_free(struct hfs_bnode *node)
{
	int i;

	for (i = 0; i < node->tree->pages_per_bnode; i++)
		if (node->page[i])
			page_cache_release(node->page[i]);
	kfree(node);
}

struct hfs_bnode *hfs_bnode_create(struct hfs_btree *tree, u32 num)
{
	struct hfs_bnode *node;
	struct page **pagep;
	int i;

	spin_lock(&tree->hash_lock);
	node = hfs_bnode_findhash(tree, num);
	spin_unlock(&tree->hash_lock);
	if (node) {
		pr_crit("new node %u already hashed?\n", num);
		WARN_ON(1);
		return node;
	}
	node = __hfs_bnode_create(tree, num);
	if (!node)
		return ERR_PTR(-ENOMEM);
	if (test_bit(HFS_BNODE_ERROR, &node->flags)) {
		hfs_bnode_put(node);
		return ERR_PTR(-EIO);
	}

	pagep = node->page;
	memset(kmap(*pagep) + node->page_offset, 0,
	       min_t(int, PAGE_CACHE_SIZE, tree->node_size));
	set_page_dirty(*pagep);
	kunmap(*pagep);
	for (i = 1; i < tree->pages_per_bnode; i++) {
		memset(kmap(*++pagep), 0, PAGE_CACHE_SIZE);
		set_page_dirty(*pagep);
		kunmap(*pagep);
	}
	clear_bit(HFS_BNODE_NEW, &node->flags);
	wake_up(&node->lock_wq);

	return node;
}

void hfs_bnode_get(struct hfs_bnode *node)
{
	if (node) {
		atomic_inc(&node->refcnt);
		hfs_dbg(BNODE_REFS, "get_node(%d:%d): %d\n",
			node->tree->cnid, node->this,
			atomic_read(&node->refcnt));
	}
}

/* Dispose of resources used by a node */
void hfs_bnode_put(struct hfs_bnode *node)
{
	if (node) {
		struct hfs_btree *tree = node->tree;
		int i;

		hfs_dbg(BNODE_REFS, "put_node(%d:%d): %d\n",
			node->tree->cnid, node->this,
			atomic_read(&node->refcnt));
		BUG_ON(!atomic_read(&node->refcnt));
		if (!atomic_dec_and_lock(&node->refcnt, &tree->hash_lock))
			return;
		for (i = 0; i < tree->pages_per_bnode; i++) {
			if (!node->page[i])
				continue;
			mark_page_accessed(node->page[i]);
		}

		if (test_bit(HFS_BNODE_DELETED, &node->flags)) {
			hfs_bnode_unhash(node);
			spin_unlock(&tree->hash_lock);
			if (hfs_bnode_need_zeroout(tree))
				hfs_bnode_clear(node, 0, tree->node_size);
			hfs_bmap_free(node);
			hfs_bnode_free(node);
			return;
		}
		spin_unlock(&tree->hash_lock);
	}
}

/*
 * Unused nodes have to be zeroed if this is the catalog tree and
 * a corresponding flag in the volume header is set.
 */
bool hfs_bnode_need_zeroout(struct hfs_btree *tree)
{
	struct super_block *sb = tree->inode->i_sb;
	struct hfsplus_sb_info *sbi = HFSPLUS_SB(sb);
	const u32 volume_attr = be32_to_cpu(sbi->s_vhdr->attributes);

	return tree->cnid == HFSPLUS_CAT_CNID &&
		volume_attr & HFSPLUS_VOL_UNUSED_NODE_FIX;
}