Alex Tomas wrote:
> interesting ..
>
> I thought VFS doesn't allow concurrent operations.
> if unlink goes first, then link should wait on the
> parent's i_mutex and then found no source name.
>
> thanks, Alex
Well... I was wondering that myself, whether this race should even
happen. But the bottom of do_unlinkat looks like:
mutex_unlock(&nd.dentry->d_inode->i_mutex);
if (inode)
iput(inode); /* truncate the inode here */
exit1:
path_release(&nd);
exit:
putname(name);
return error;
so I think it's possible that link can sneak in there & find it after
the mutex is dropped...? Is this ok? :) It's certainly -happening-
anyway....
-Eric
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