Hi Richard, On Thu, 30 Mar 2017 00:15:31 +0200 Richard Weinberger <richard@xxxxxx> wrote: > Ralph, > > Am 29.03.2017 um 23:26 schrieb Ralph Sennhauser: > >> # create and link a tmpfile - then remove it > >> sudo rm -rf foo; sudo xfs_io -T -c "flink foo" . ; ls -l foo; sudo > >> rm foo > > > > next-20170328, obviously without your patch: > > > > # xfs_io -T -c "flink foo" . > > .: Not supported > > -T tells xfs_io to create a tmpfile but you have it disabled in UBIFS. Bash history says I booted the other partition than I flashed (uname just happened to match), the downside of the dual boot layout. :) # rm -rf foo # xfs_io -T -c "flink foo" . # ls -l foo -rw------- 1 root root 0 Mar 30 02:00 foo # rm foo [ 305.001436] UBIFS error (ubi0:0 pid 2493): ubifs_add_orphan: orphaned twice However, unlike with the overlay setup the filesystem can be mounted just fine without imediatly visible side effects. > > Anyway, can you please test the attached patch? > Amir was right, UBIFS misses a corner case in ubifs_link(). ;-\ > > I think I understand also why we never noticed this in xfstests, > UBIFS prints only a non-fatal error while umounting the filesystem in > this case. But will test tomorrow in more detail, need some sleep now. > > diff --git a/fs/ubifs/dir.c b/fs/ubifs/dir.c > index 30825d882aa9..95e348a2da29 100644 > --- a/fs/ubifs/dir.c > +++ b/fs/ubifs/dir.c > @@ -748,6 +748,9 @@ static int ubifs_link(struct dentry *old_dentry, > struct inode *dir, goto out_fname; > > lock_2_inodes(dir, inode); > + if (inode->i_nlink == 0) > + ubifs_delete_orphan(c, inode->i_ino); > + > inc_nlink(inode); > ihold(inode); > inode->i_ctime = ubifs_current_time(inode); > > Thanks, > //richard With this patch I'm no longer able to reproduce _this_ issue, however, rename no longer works either: # mv /etc/config/wireless /etc/config/wireless.back mv: can't rename '/etc/config/wireless': Invalid argument # ls /etc/config/wireless /etc/config/wireless # rm /etc/config/wireless # ls /etc/config/wireless ls: /etc/config/wireless: No such file or directory Thanks Ralph -- To unsubscribe from this list: send the line "unsubscribe linux-unionfs" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
