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https://github.com/Fishwaldo/Star64_linux.git
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Fix btrfs_wait_ordered_extent_range to properly wait
Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
parent
7f3c74fb83
commit
e5a2217ef6
3 changed files with 48 additions and 24 deletions
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@ -128,7 +128,9 @@ static int cow_file_range(struct inode *inode, u64 start, u64 end)
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goto out;
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BUG_ON(num_bytes > btrfs_super_total_bytes(&root->fs_info->super_copy));
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mutex_lock(&BTRFS_I(inode)->extent_mutex);
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btrfs_drop_extent_cache(inode, start, start + num_bytes - 1);
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mutex_unlock(&BTRFS_I(inode)->extent_mutex);
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while(num_bytes > 0) {
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cur_alloc_size = min(num_bytes, root->fs_info->max_extent);
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@ -144,6 +146,7 @@ static int cow_file_range(struct inode *inode, u64 start, u64 end)
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em->len = ins.offset;
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em->block_start = ins.objectid;
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em->bdev = root->fs_info->fs_devices->latest_bdev;
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mutex_lock(&BTRFS_I(inode)->extent_mutex);
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set_bit(EXTENT_FLAG_PINNED, &em->flags);
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while(1) {
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spin_lock(&em_tree->lock);
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@ -156,6 +159,7 @@ static int cow_file_range(struct inode *inode, u64 start, u64 end)
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btrfs_drop_extent_cache(inode, start,
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start + ins.offset - 1);
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}
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mutex_unlock(&BTRFS_I(inode)->extent_mutex);
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cur_alloc_size = ins.offset;
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ret = btrfs_add_ordered_extent(inode, start, ins.objectid,
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@ -487,6 +491,8 @@ static int btrfs_finish_ordered_io(struct inode *inode, u64 start, u64 end)
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struct extent_map_tree *em_tree = &BTRFS_I(inode)->extent_tree;
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struct extent_map *em;
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u64 alloc_hint = 0;
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u64 clear_start;
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u64 clear_end;
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struct list_head list;
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struct btrfs_key ins;
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int ret;
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@ -509,12 +515,14 @@ static int btrfs_finish_ordered_io(struct inode *inode, u64 start, u64 end)
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ins.objectid = ordered_extent->start;
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ins.offset = ordered_extent->len;
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ins.type = BTRFS_EXTENT_ITEM_KEY;
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ret = btrfs_alloc_reserved_extent(trans, root, root->root_key.objectid,
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trans->transid, inode->i_ino,
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ordered_extent->file_offset, &ins);
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BUG_ON(ret);
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mutex_lock(&BTRFS_I(inode)->extent_mutex);
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ret = btrfs_drop_extents(trans, root, inode,
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ordered_extent->file_offset,
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ordered_extent->file_offset +
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@ -528,13 +536,19 @@ static int btrfs_finish_ordered_io(struct inode *inode, u64 start, u64 end)
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ordered_extent->len, 0);
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BUG_ON(ret);
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spin_lock(&em_tree->lock);
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em = lookup_extent_mapping(em_tree, ordered_extent->file_offset,
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ordered_extent->len);
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if (em) {
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clear_bit(EXTENT_FLAG_PINNED, &em->flags);
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free_extent_map(em);
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clear_start = ordered_extent->file_offset;
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clear_end = ordered_extent->file_offset + ordered_extent->len;
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while(clear_start < clear_end) {
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em = lookup_extent_mapping(em_tree, clear_start,
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clear_end - clear_start);
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if (em) {
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clear_bit(EXTENT_FLAG_PINNED, &em->flags);
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clear_start = em->start + em->len;
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free_extent_map(em);
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} else {
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break;
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}
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}
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spin_unlock(&em_tree->lock);
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