Re: [PATCH] fs: call security_d_instantiate in d_obtain_alias

[David Quigley]

[snip]
> If you have persistent xattr support we need the dentry since the xattr
> code requires a dentry.  I have no idea why but that's what
> inode->i_op->getxattr() requires.

The original reason that the xattr operations take dentries is because 
of p9fs and CIFS. CIFS uses the name of the file to grab the extended 
attributes and so does p9fs. I had tried to remove this a while ago but 
couldn't find a way around that. When trying to find a solution I also 
got push back from Miklos (FUSE) as he views a filesystem being able to 
make xattr decisions based on the path name being a valid use-case.

Dave
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