#include <linux/gfp.h>
#include <linux/slab.h>
#include <linux/blkdev.h>
+#include <linux/writeback.h>
+#include <linux/pagevec.h>
#include "ctree.h"
#include "transaction.h"
#include "btrfs_inode.h"
* start IO on any dirty ones so the wait doesn't stall waiting
* for pdflush to find them
*/
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,22)
- do_sync_file_range(file, start, end, SYNC_FILE_RANGE_WRITE);
-#else
- do_sync_mapping_range(inode->i_mapping, start, end,
- SYNC_FILE_RANGE_WRITE);
-#endif
+ btrfs_fdatawrite_range(inode->i_mapping, start, end, WB_SYNC_NONE);
if (wait)
wait_event(entry->wait, test_bit(BTRFS_ORDERED_COMPLETE,
&entry->flags));
u64 orig_end;
u64 wait_end;
struct btrfs_ordered_extent *ordered;
- u64 mask = BTRFS_I(inode)->root->sectorsize - 1;
if (start + len < start) {
- wait_end = (inode->i_size + mask) & ~mask;
- orig_end = (u64)-1;
+ orig_end = INT_LIMIT(loff_t);
} else {
orig_end = start + len - 1;
- wait_end = orig_end;
+ if (orig_end > INT_LIMIT(loff_t))
+ orig_end = INT_LIMIT(loff_t);
}
+ wait_end = orig_end;
again:
/* start IO across the range first to instantiate any delalloc
* extents
*/
-#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,22)
- do_sync_file_range(file, start, wait_end, SYNC_FILE_RANGE_WRITE);
-#else
- do_sync_mapping_range(inode->i_mapping, start, wait_end,
- SYNC_FILE_RANGE_WRITE);
-#endif
- end = orig_end;
- wait_on_extent_writeback(&BTRFS_I(inode)->io_tree, start, orig_end);
+ btrfs_fdatawrite_range(inode->i_mapping, start, orig_end, WB_SYNC_NONE);
+
+ btrfs_wait_on_page_writeback_range(inode->i_mapping,
+ start >> PAGE_CACHE_SHIFT,
+ orig_end >> PAGE_CACHE_SHIFT);
+ end = orig_end;
while(1) {
ordered = btrfs_lookup_first_ordered_extent(inode, end);
if (!ordered) {
ordered_sum = list_entry(cur, struct btrfs_ordered_sum, list);
if (offset >= ordered_sum->file_offset) {
num_sectors = ordered_sum->len / sectorsize;
- sector_sums = &ordered_sum->sums;
+ sector_sums = ordered_sum->sums;
for (i = 0; i < num_sectors; i++) {
if (sector_sums[i].offset == offset) {
*sum = sector_sums[i].sum;
}
out:
mutex_unlock(&tree->mutex);
+ btrfs_put_ordered_extent(ordered);
return ret;
}
+
+/**
+ * taken from mm/filemap.c because it isn't exported
+ *
+ * __filemap_fdatawrite_range - start writeback on mapping dirty pages in range
+ * @mapping: address space structure to write
+ * @start: offset in bytes where the range starts
+ * @end: offset in bytes where the range ends (inclusive)
+ * @sync_mode: enable synchronous operation
+ *
+ * Start writeback against all of a mapping's dirty pages that lie
+ * within the byte offsets <start, end> inclusive.
+ *
+ * If sync_mode is WB_SYNC_ALL then this is a "data integrity" operation, as
+ * opposed to a regular memory cleansing writeback. The difference between
+ * these two operations is that if a dirty page/buffer is encountered, it must
+ * be waited upon, and not just skipped over.
+ */
+int btrfs_fdatawrite_range(struct address_space *mapping, loff_t start,
+ loff_t end, int sync_mode)
+{
+ struct writeback_control wbc = {
+ .sync_mode = sync_mode,
+ .nr_to_write = mapping->nrpages * 2,
+ .range_start = start,
+ .range_end = end,
+ .for_writepages = 1,
+ };
+ return btrfs_writepages(mapping, &wbc);
+}
+
+/**
+ * taken from mm/filemap.c because it isn't exported
+ *
+ * wait_on_page_writeback_range - wait for writeback to complete
+ * @mapping: target address_space
+ * @start: beginning page index
+ * @end: ending page index
+ *
+ * Wait for writeback to complete against pages indexed by start->end
+ * inclusive
+ */
+int btrfs_wait_on_page_writeback_range(struct address_space *mapping,
+ pgoff_t start, pgoff_t end)
+{
+ struct pagevec pvec;
+ int nr_pages;
+ int ret = 0;
+ pgoff_t index;
+
+ if (end < start)
+ return 0;
+
+ pagevec_init(&pvec, 0);
+ index = start;
+ while ((index <= end) &&
+ (nr_pages = pagevec_lookup_tag(&pvec, mapping, &index,
+ PAGECACHE_TAG_WRITEBACK,
+ min(end - index, (pgoff_t)PAGEVEC_SIZE-1) + 1)) != 0) {
+ unsigned i;
+
+ for (i = 0; i < nr_pages; i++) {
+ struct page *page = pvec.pages[i];
+
+ /* until radix tree lookup accepts end_index */
+ if (page->index > end)
+ continue;
+
+ wait_on_page_writeback(page);
+ if (PageError(page))
+ ret = -EIO;
+ }
+ pagevec_release(&pvec);
+ cond_resched();
+ }
+
+ /* Check for outstanding write errors */
+ if (test_and_clear_bit(AS_ENOSPC, &mapping->flags))
+ ret = -ENOSPC;
+ if (test_and_clear_bit(AS_EIO, &mapping->flags))
+ ret = -EIO;
+
+ return ret;
+}
projects / linux-2.6-block.git / blobdiff