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authorChris Mason <chris.mason@oracle.com>2008-07-24 11:57:52 -0400
committerChris Mason <chris.mason@oracle.com>2008-09-25 11:04:05 -0400
commit3eaa2885276fd6dac7b076a793932428b7168e74 (patch)
treeb06382bec68bf1755597a74ac8225f3bcddda5e5 /fs/btrfs/ioctl.c
parent64f26f745084872b916cd1bef6054e21b15c5784 (diff)
Btrfs: Fix the defragmention code and the block relocation code for data=ordered
Before setting an extent to delalloc, the code needs to wait for pending ordered extents. Also, the relocation code needs to wait for ordered IO before scanning the block group again. This is because the extents are not removed until the IO for the new extents is finished Signed-off-by: Chris Mason <chris.mason@oracle.com>
Diffstat (limited to 'fs/btrfs/ioctl.c')
-rw-r--r--fs/btrfs/ioctl.c21
1 files changed, 14 insertions, 7 deletions
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index 83f17a5cbd6a..a61f2e7e2db5 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -213,6 +213,7 @@ int btrfs_defrag_file(struct file *file)
struct inode *inode = fdentry(file)->d_inode;
struct btrfs_root *root = BTRFS_I(inode)->root;
struct extent_io_tree *io_tree = &BTRFS_I(inode)->io_tree;
+ struct btrfs_ordered_extent *ordered;
struct page *page;
unsigned long last_index;
unsigned long ra_pages = root->fs_info->bdi.ra_pages;
@@ -234,6 +235,7 @@ int btrfs_defrag_file(struct file *file)
min(last_index, i + ra_pages - 1));
}
total_read++;
+again:
page = grab_cache_page(inode->i_mapping, i);
if (!page)
goto out_unlock;
@@ -247,18 +249,23 @@ int btrfs_defrag_file(struct file *file)
}
}
-#if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,18)
- ClearPageDirty(page);
-#else
- cancel_dirty_page(page, PAGE_CACHE_SIZE);
-#endif
wait_on_page_writeback(page);
- set_page_extent_mapped(page);
page_start = (u64)page->index << PAGE_CACHE_SHIFT;
page_end = page_start + PAGE_CACHE_SIZE - 1;
-
lock_extent(io_tree, page_start, page_end, GFP_NOFS);
+
+ ordered = btrfs_lookup_ordered_extent(inode, page_start);
+ if (ordered) {
+ unlock_extent(io_tree, page_start, page_end, GFP_NOFS);
+ unlock_page(page);
+ page_cache_release(page);
+ btrfs_start_ordered_extent(inode, ordered, 1);
+ btrfs_put_ordered_extent(ordered);
+ goto again;
+ }
+ set_page_extent_mapped(page);
+
set_extent_delalloc(io_tree, page_start,
page_end, GFP_NOFS);