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-rw-r--r--fs/btrfs/extent_io.c35
1 files changed, 26 insertions, 9 deletions
diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index aea990473392..9d1f42200af5 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -3628,6 +3628,13 @@ void wait_on_extent_buffer_writeback(struct extent_buffer *eb)
TASK_UNINTERRUPTIBLE);
}
+static void end_extent_buffer_writeback(struct extent_buffer *eb)
+{
+ clear_bit(EXTENT_BUFFER_WRITEBACK, &eb->bflags);
+ smp_mb__after_atomic();
+ wake_up_bit(&eb->bflags, EXTENT_BUFFER_WRITEBACK);
+}
+
/*
* Lock eb pages and flush the bio if we can't the locks
*
@@ -3699,8 +3706,11 @@ static noinline_for_stack int lock_extent_buffer_for_io(struct extent_buffer *eb
if (!trylock_page(p)) {
if (!flush) {
- ret = flush_write_bio(epd);
- if (ret < 0) {
+ int err;
+
+ err = flush_write_bio(epd);
+ if (err < 0) {
+ ret = err;
failed_page_nr = i;
goto err_unlock;
}
@@ -3715,16 +3725,23 @@ err_unlock:
/* Unlock already locked pages */
for (i = 0; i < failed_page_nr; i++)
unlock_page(eb->pages[i]);
+ /*
+ * Clear EXTENT_BUFFER_WRITEBACK and wake up anyone waiting on it.
+ * Also set back EXTENT_BUFFER_DIRTY so future attempts to this eb can
+ * be made and undo everything done before.
+ */
+ btrfs_tree_lock(eb);
+ spin_lock(&eb->refs_lock);
+ set_bit(EXTENT_BUFFER_DIRTY, &eb->bflags);
+ end_extent_buffer_writeback(eb);
+ spin_unlock(&eb->refs_lock);
+ percpu_counter_add_batch(&fs_info->dirty_metadata_bytes, eb->len,
+ fs_info->dirty_metadata_batch);
+ btrfs_clear_header_flag(eb, BTRFS_HEADER_FLAG_WRITTEN);
+ btrfs_tree_unlock(eb);
return ret;
}
-static void end_extent_buffer_writeback(struct extent_buffer *eb)
-{
- clear_bit(EXTENT_BUFFER_WRITEBACK, &eb->bflags);
- smp_mb__after_atomic();
- wake_up_bit(&eb->bflags, EXTENT_BUFFER_WRITEBACK);
-}
-
static void set_btree_ioerr(struct page *page)
{
struct extent_buffer *eb = (struct extent_buffer *)page->private;