Hi, Hidehiro Kawai wrote: > This patch fixes the similar bug fixed by commit 95450f5a. > > If a directory is modified, its data block is journaled as metadata > and finally written back to the right place. Now, we assume a > transient write erorr happens on that writeback. Uptodate flag of > the buffer is cleared by write error, so next access on the buffer > causes a reread from disk. This means it breaks the filesystems > consistency. After sending this patch, I noticed that I have to deal with the bh_uptodate_or_lock() case as well. Actually, I confirmed a data block sharing happens between two inodes. Allocate a new block, then modified bitmap goes to the fs, but it fails due to a transient IO error. Next access on the bitmap buffer cause a reread from disk. As a result, the allocated block becomes a FREE block! So this block can be shared by different two inodes. I'll send the revised version later. Thanks, -- Hidehiro Kawai Hitachi, Systems Development Laboratory Linux Technology Center -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
