Messages in this thread | | | Date | Fri, 20 Nov 2015 22:33:43 +0000 | From | Al Viro <> | Subject | Re: [RFC] readlink()-related oddities |
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On Fri, Nov 20, 2015 at 09:59:05AM +0000, David Howells wrote:
> There's an AFS userspace command that could be used to query a mountpoint that > was going to use it. However, I suspect readlink() will now always trigger > the automount.
It won't, actually. All we are passing to user_path_at_empty() is LOOKUP_EMPTY, so for the final component we'll have if (!(nd->flags & (LOOKUP_PARENT | LOOKUP_DIRECTORY | LOOKUP_OPEN | LOOKUP_CREATE | LOOKUP_AUTOMOUNT)) && path->dentry->d_inode) return -EISDIR; in follow_automount() trigger and follow_managed() will turn that -EISDIR into 0. IOW, readlink(2) does work on those, same as stat() (since Sep 2011).
Sigh... OK, let's leave it for now; ->open() for those guys is completely bogus, AFAICS, but that's local bogo^Wbusiness.
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