int nilfs_gccache_wait_and_mark_dirty(struct buffer_head *bh) { wait_on_buffer(bh); if (!buffer_uptodate(bh)) return -EIO; if (buffer_dirty(bh)) return -EEXIST; if (buffer_nilfs_node(bh)) nilfs_btnode_mark_dirty(bh); else nilfs_mdt_mark_buffer_dirty(bh); return 0; }
/** * nilfs_btnode_commit_change_key * commit the change_key operation prepared by prepare_change_key(). */ void nilfs_btnode_commit_change_key(struct address_space *btnc, struct nilfs_btnode_chkey_ctxt *ctxt) { struct buffer_head *obh = ctxt->bh, *nbh = ctxt->newbh; __u64 oldkey = ctxt->oldkey, newkey = ctxt->newkey; struct page *opage; if (oldkey == newkey) return; if (nbh == NULL) { /* blocksize == pagesize */ opage = obh->b_page; if (unlikely(oldkey != opage->index)) NILFS_PAGE_BUG(opage, "invalid oldkey %lld (newkey=%lld)", (unsigned long long)oldkey, (unsigned long long)newkey); nilfs_btnode_mark_dirty(obh); spin_lock_irq(&btnc->tree_lock); radix_tree_delete(&btnc->page_tree, oldkey); radix_tree_tag_set(&btnc->page_tree, newkey, PAGECACHE_TAG_DIRTY); spin_unlock_irq(&btnc->tree_lock); opage->index = obh->b_blocknr = newkey; unlock_page(opage); } else { nilfs_copy_buffer(nbh, obh); nilfs_btnode_mark_dirty(nbh); nbh->b_blocknr = newkey; ctxt->bh = nbh; nilfs_btnode_delete(obh); /* will decrement bh->b_count */ } }