disko = 0;
flags = 0;
- switch (em->block_start) {
- case EXTENT_MAP_LAST_BYTE:
+ if (em->block_start == EXTENT_MAP_LAST_BYTE) {
end = 1;
flags |= FIEMAP_EXTENT_LAST;
- break;
- case EXTENT_MAP_HOLE:
+ } else if (em->block_start == EXTENT_MAP_HOLE) {
flags |= FIEMAP_EXTENT_UNWRITTEN;
- break;
- case EXTENT_MAP_INLINE:
+ } else if (em->block_start == EXTENT_MAP_INLINE) {
flags |= (FIEMAP_EXTENT_DATA_INLINE |
FIEMAP_EXTENT_NOT_ALIGNED);
- break;
- case EXTENT_MAP_DELALLOC:
+ } else if (em->block_start == EXTENT_MAP_DELALLOC) {
flags |= (FIEMAP_EXTENT_DELALLOC |
FIEMAP_EXTENT_UNKNOWN);
- break;
- default:
+ } else {
disko = em->block_start;
- break;
}
if (test_bit(EXTENT_FLAG_COMPRESSED, &em->flags))
flags |= FIEMAP_EXTENT_ENCODED;
int clear_extent_buffer_dirty(struct extent_io_tree *tree,
struct extent_buffer *eb)
{
- int set;
unsigned long i;
unsigned long num_pages;
struct page *page;
- u64 start = eb->start;
- u64 end = start + eb->len - 1;
-
- set = clear_extent_dirty(tree, start, end, GFP_NOFS);
num_pages = num_extent_pages(eb->start, eb->len);
for (i = 0; i < num_pages; i++) {
page = extent_buffer_page(eb, i);
- if (!set && !PageDirty(page))
+ if (!PageDirty(page))
continue;
lock_page(page);
else
set_page_private(page, EXTENT_PAGE_PRIVATE);
- /*
- * if we're on the last page or the first page and the
- * block isn't aligned on a page boundary, do extra checks
- * to make sure we don't clean page that is partially dirty
- */
- if ((i == 0 && (eb->start & (PAGE_CACHE_SIZE - 1))) ||
- ((i == num_pages - 1) &&
- ((eb->start + eb->len) & (PAGE_CACHE_SIZE - 1)))) {
- start = (u64)page->index << PAGE_CACHE_SHIFT;
- end = start + PAGE_CACHE_SIZE - 1;
- if (test_range_bit(tree, start, end,
- EXTENT_DIRTY, 0)) {
- unlock_page(page);
- continue;
- }
- }
clear_page_dirty_for_io(page);
spin_lock_irq(&page->mapping->tree_lock);
if (!PageDirty(page)) {
{
unsigned long i;
unsigned long num_pages;
+ int was_dirty = 0;
+ was_dirty = test_and_set_bit(EXTENT_BUFFER_DIRTY, &eb->bflags);
num_pages = num_extent_pages(eb->start, eb->len);
- for (i = 0; i < num_pages; i++) {
- struct page *page = extent_buffer_page(eb, i);
- /* writepage may need to do something special for the
- * first page, we have to make sure page->private is
- * properly set. releasepage may drop page->private
- * on us if the page isn't already dirty.
- */
- lock_page(page);
- if (i == 0) {
- set_page_extent_head(page, eb->len);
- } else if (PagePrivate(page) &&
- page->private != EXTENT_PAGE_PRIVATE) {
- set_page_extent_mapped(page);
- }
+ for (i = 0; i < num_pages; i++)
__set_page_dirty_nobuffers(extent_buffer_page(eb, i));
- set_extent_dirty(tree, page_offset(page),
- page_offset(page) + PAGE_CACHE_SIZE - 1,
- GFP_NOFS);
- unlock_page(page);
- }
- return 0;
+ return was_dirty;
}
int clear_extent_buffer_uptodate(struct extent_io_tree *tree,
ret = 0;
goto out;
}
+ if (test_bit(EXTENT_BUFFER_DIRTY, &eb->bflags)) {
+ ret = 0;
+ goto out;
+ }
/* at this point we can safely release the extent buffer */
num_pages = num_extent_pages(eb->start, eb->len);
for (i = 0; i < num_pages; i++)