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btrfs: replace async_cow::root with fs_info
The async_cow::root is used to propagate fs_info to async_cow_submit. We can't use inode to reach it because it could become NULL after write without compression in async_cow_start. Reviewed-by: Nikolay Borisov <nborisov@suse.com> Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de> Signed-off-by: David Sterba <dsterba@suse.com>
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@ -358,7 +358,7 @@ struct async_extent {
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struct async_cow {
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struct inode *inode;
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struct btrfs_root *root;
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struct btrfs_fs_info *fs_info;
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struct page *locked_page;
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u64 start;
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u64 end;
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@ -1144,13 +1144,11 @@ static noinline void async_cow_submit(struct btrfs_work *work)
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{
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struct btrfs_fs_info *fs_info;
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struct async_cow *async_cow;
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struct btrfs_root *root;
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unsigned long nr_pages;
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async_cow = container_of(work, struct async_cow, work);
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root = async_cow->root;
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fs_info = root->fs_info;
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fs_info = async_cow->fs_info;
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nr_pages = (async_cow->end - async_cow->start + PAGE_SIZE) >>
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PAGE_SHIFT;
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@ -1179,7 +1177,6 @@ static int cow_file_range_async(struct inode *inode, struct page *locked_page,
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{
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struct btrfs_fs_info *fs_info = btrfs_sb(inode->i_sb);
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struct async_cow *async_cow;
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struct btrfs_root *root = BTRFS_I(inode)->root;
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unsigned long nr_pages;
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u64 cur_end;
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@ -1189,7 +1186,7 @@ static int cow_file_range_async(struct inode *inode, struct page *locked_page,
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async_cow = kmalloc(sizeof(*async_cow), GFP_NOFS);
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BUG_ON(!async_cow); /* -ENOMEM */
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async_cow->inode = igrab(inode);
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async_cow->root = root;
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async_cow->fs_info = fs_info;
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async_cow->locked_page = locked_page;
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async_cow->start = start;
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async_cow->write_flags = write_flags;
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