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Btrfs: remove #if 0 code
Btrfs had some old code sitting around under #if 0, this drops it. Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Chris Mason
parent
d6397baee4
commit
b7967db75a
3 changed files with 1 additions and 188 deletions
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@ -584,18 +584,7 @@ int btrfs_wq_submit_bio(struct btrfs_fs_info *fs_info, struct inode *inode,
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btrfs_set_work_high_prio(&async->work);
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btrfs_queue_worker(&fs_info->workers, &async->work);
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#if 0
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int limit = btrfs_async_submit_limit(fs_info);
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if (atomic_read(&fs_info->nr_async_submits) > limit) {
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wait_event_timeout(fs_info->async_submit_wait,
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(atomic_read(&fs_info->nr_async_submits) < limit),
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HZ/10);
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wait_event_timeout(fs_info->async_submit_wait,
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(atomic_read(&fs_info->nr_async_bios) < limit),
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HZ/10);
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}
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#endif
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while (atomic_read(&fs_info->async_submit_draining) &&
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atomic_read(&fs_info->nr_async_submits)) {
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wait_event(fs_info->async_submit_wait,
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@ -770,27 +759,6 @@ static void btree_invalidatepage(struct page *page, unsigned long offset)
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}
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}
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#if 0
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static int btree_writepage(struct page *page, struct writeback_control *wbc)
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{
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struct buffer_head *bh;
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struct btrfs_root *root = BTRFS_I(page->mapping->host)->root;
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struct buffer_head *head;
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if (!page_has_buffers(page)) {
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create_empty_buffers(page, root->fs_info->sb->s_blocksize,
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(1 << BH_Dirty)|(1 << BH_Uptodate));
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}
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head = page_buffers(page);
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bh = head;
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do {
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if (buffer_dirty(bh))
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csum_tree_block(root, bh, 0);
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bh = bh->b_this_page;
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} while (bh != head);
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return block_write_full_page(page, btree_get_block, wbc);
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}
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#endif
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static struct address_space_operations btree_aops = {
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.readpage = btree_readpage,
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.writepage = btree_writepage,
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@ -1278,11 +1246,7 @@ static int btrfs_congested_fn(void *congested_data, int bdi_bits)
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int ret = 0;
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struct btrfs_device *device;
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struct backing_dev_info *bdi;
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#if 0
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if ((bdi_bits & (1 << BDI_write_congested)) &&
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btrfs_congested_async(info, 0))
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return 1;
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#endif
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list_for_each_entry(device, &info->fs_devices->devices, dev_list) {
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if (!device->bdev)
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continue;
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@ -2334,16 +2298,6 @@ int close_ctree(struct btrfs_root *root)
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btrfs_stop_workers(&fs_info->endio_write_workers);
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btrfs_stop_workers(&fs_info->submit_workers);
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#if 0
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while (!list_empty(&fs_info->hashers)) {
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struct btrfs_hasher *hasher;
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hasher = list_entry(fs_info->hashers.next, struct btrfs_hasher,
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hashers);
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list_del(&hasher->hashers);
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crypto_free_hash(&fs_info->hash_tfm);
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kfree(hasher);
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}
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#endif
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btrfs_close_devices(fs_info->fs_devices);
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btrfs_mapping_tree_free(&fs_info->mapping_tree);
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@ -1401,69 +1401,6 @@ out:
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return total_bytes;
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}
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#if 0
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/*
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* helper function to lock both pages and extents in the tree.
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* pages must be locked first.
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*/
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static int lock_range(struct extent_io_tree *tree, u64 start, u64 end)
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{
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unsigned long index = start >> PAGE_CACHE_SHIFT;
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unsigned long end_index = end >> PAGE_CACHE_SHIFT;
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struct page *page;
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int err;
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while (index <= end_index) {
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page = grab_cache_page(tree->mapping, index);
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if (!page) {
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err = -ENOMEM;
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goto failed;
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}
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if (IS_ERR(page)) {
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err = PTR_ERR(page);
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goto failed;
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}
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index++;
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}
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lock_extent(tree, start, end, GFP_NOFS);
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return 0;
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failed:
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/*
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* we failed above in getting the page at 'index', so we undo here
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* up to but not including the page at 'index'
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*/
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end_index = index;
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index = start >> PAGE_CACHE_SHIFT;
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while (index < end_index) {
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page = find_get_page(tree->mapping, index);
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unlock_page(page);
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page_cache_release(page);
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index++;
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}
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return err;
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}
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/*
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* helper function to unlock both pages and extents in the tree.
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*/
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static int unlock_range(struct extent_io_tree *tree, u64 start, u64 end)
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{
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unsigned long index = start >> PAGE_CACHE_SHIFT;
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unsigned long end_index = end >> PAGE_CACHE_SHIFT;
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struct page *page;
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while (index <= end_index) {
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page = find_get_page(tree->mapping, index);
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unlock_page(page);
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page_cache_release(page);
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index++;
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}
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unlock_extent(tree, start, end, GFP_NOFS);
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return 0;
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}
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#endif
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/*
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* set the private field for a given byte offset in the tree. If there isn't
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* an extent_state there already, this does nothing.
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@ -272,83 +272,6 @@ int btrfs_drop_extent_cache(struct inode *inode, u64 start, u64 end,
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return 0;
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}
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int btrfs_check_file(struct btrfs_root *root, struct inode *inode)
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{
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return 0;
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#if 0
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struct btrfs_path *path;
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struct btrfs_key found_key;
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struct extent_buffer *leaf;
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struct btrfs_file_extent_item *extent;
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u64 last_offset = 0;
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int nritems;
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int slot;
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int found_type;
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int ret;
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int err = 0;
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u64 extent_end = 0;
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path = btrfs_alloc_path();
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ret = btrfs_lookup_file_extent(NULL, root, path, inode->i_ino,
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last_offset, 0);
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while (1) {
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nritems = btrfs_header_nritems(path->nodes[0]);
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if (path->slots[0] >= nritems) {
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ret = btrfs_next_leaf(root, path);
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if (ret)
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goto out;
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nritems = btrfs_header_nritems(path->nodes[0]);
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}
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slot = path->slots[0];
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leaf = path->nodes[0];
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btrfs_item_key_to_cpu(leaf, &found_key, slot);
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if (found_key.objectid != inode->i_ino)
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break;
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if (found_key.type != BTRFS_EXTENT_DATA_KEY)
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goto out;
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if (found_key.offset < last_offset) {
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WARN_ON(1);
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btrfs_print_leaf(root, leaf);
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printk(KERN_ERR "inode %lu found offset %llu "
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"expected %llu\n", inode->i_ino,
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(unsigned long long)found_key.offset,
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(unsigned long long)last_offset);
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err = 1;
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goto out;
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}
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extent = btrfs_item_ptr(leaf, slot,
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struct btrfs_file_extent_item);
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found_type = btrfs_file_extent_type(leaf, extent);
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if (found_type == BTRFS_FILE_EXTENT_REG) {
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extent_end = found_key.offset +
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btrfs_file_extent_num_bytes(leaf, extent);
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} else if (found_type == BTRFS_FILE_EXTENT_INLINE) {
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struct btrfs_item *item;
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item = btrfs_item_nr(leaf, slot);
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extent_end = found_key.offset +
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btrfs_file_extent_inline_len(leaf, extent);
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extent_end = (extent_end + root->sectorsize - 1) &
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~((u64)root->sectorsize - 1);
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}
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last_offset = extent_end;
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path->slots[0]++;
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}
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if (0 && last_offset < inode->i_size) {
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WARN_ON(1);
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btrfs_print_leaf(root, leaf);
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printk(KERN_ERR "inode %lu found offset %llu size %llu\n",
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inode->i_ino, (unsigned long long)last_offset,
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(unsigned long long)inode->i_size);
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err = 1;
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}
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out:
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btrfs_free_path(path);
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return err;
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#endif
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}
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/*
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* this is very complex, but the basic idea is to drop all extents
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* in the range start - end. hint_block is filled in with a block number
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@ -689,7 +612,6 @@ out:
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unlock_extent(&BTRFS_I(inode)->io_tree, orig_locked_end,
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locked_end - 1, GFP_NOFS);
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}
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btrfs_check_file(root, inode);
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return ret;
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}
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