On Mon, Jun 26, 2017 at 10:34:18AM -0400, Jeff Layton wrote: > The bigger question is -- what about more complex filesystems like > ext4? There are a couple of cases where we can return -EIO or -EROFS on > fsync before filemap_write_and_wait_range is ever called. Like this one > for instance: > > if (unlikely(ext4_forced_shutdown(EXT4_SB(inode->i_sb)))) > return -EIO; > > ...and the EXT4_MF_FS_ABORTED case. > > Are those conditions ever recoverable, such that a later fsync could > succeed? IOW, could I do a remount or something such that the existing > fds are left open and become usable again? This looks copied from the xfs forced shutdown code, and in that case it's final and permanent - you'll need an unmount to clear it. > If so, then we really ought to advance the errseq_t in the file when we > catch those cases as well. If we have to do that, then it probably makes > sense to leave the ext4 patch as-is. I think it can switch to the new file helper.
