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From: Richard Weinberger <richard@nod.at>
To: Amir Goldstein <amir73il@gmail.com>
Cc: Miklos Szeredi <miklos@szeredi.hu>,
	linux-fsdevel <linux-fsdevel@vger.kernel.org>,
	linux-fscrypt@vger.kernel.org,
	overlayfs <linux-unionfs@vger.kernel.org>,
	linux-kernel <linux-kernel@vger.kernel.org>,
	Paul Lawrence <paullawrence@google.com>
Subject: Re: overlayfs vs. fscrypt
Date: Wed, 13 Mar 2019 21:33:10 +0100	[thread overview]
Message-ID: <15244624.W7e5yEypHC@blindfold> (raw)
In-Reply-To: <CAOQ4uxhqQKzriL0An4Tvzc1E_LffL-z9q1otOW_RdD1ZdKWP3Q@mail.gmail.com>

Am Mittwoch, 13. März 2019, 15:26:54 CET schrieb Amir Goldstein:
> IMO, the best thing for UBIFS to do would be to modify fscrypt to support
> opting out of the revalidate behavior, IWO, sanitize your hack to an API.

Given the WTF/s rate this thread has, this might me a good option.
Actually people already asked me how to disable this feature because
they saw no use of it.
Being able to delete encrypted files looks good on the feature list but in
reality it has very few users but causes confusion, IMHO.

I propose a new fscrypt_operations flag, FS_CFLG_NO_CRYPT_FNAMES.
If this flag is set, a) fscrypt_setup_filename() will return -EPERM if
no key is found.
And b) __fscrypt_prepare_lookup() will not attach fscrypt_d_ops to the dentry.

Eric, what do you think?

Thanks,
//richard



  parent reply	other threads:[~2019-03-13 20:33 UTC|newest]

Thread overview: 51+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-03-13 12:31 overlayfs vs. fscrypt Richard Weinberger
2019-03-13 12:36 ` Miklos Szeredi
2019-03-13 12:47   ` Richard Weinberger
2019-03-13 12:58     ` Miklos Szeredi
2019-03-13 13:00       ` Richard Weinberger
2019-03-13 13:24         ` Miklos Szeredi
2019-03-13 13:32           ` Richard Weinberger
2019-03-13 14:26             ` Amir Goldstein
2019-03-13 15:16               ` Theodore Ts'o
2019-03-13 15:30                 ` Richard Weinberger
2019-03-13 15:36                 ` James Bottomley
2019-03-13 15:51                   ` Eric Biggers
2019-03-13 16:13                     ` James Bottomley
2019-03-13 16:24                       ` Richard Weinberger
2019-03-13 16:44                   ` Theodore Ts'o
2019-03-13 17:45                     ` James Bottomley
2019-03-13 18:58                       ` Theodore Ts'o
2019-03-13 19:17                         ` James Bottomley
2019-03-13 19:57                           ` Eric Biggers
2019-03-13 20:06                             ` James Bottomley
2019-03-13 20:25                               ` Eric Biggers
2019-03-13 21:04                                 ` James Bottomley
2019-03-13 22:13                                   ` Eric Biggers
2019-03-13 22:29                                     ` James Bottomley
2019-03-13 22:58                                       ` Eric Biggers
2019-03-13 16:06                 ` Al Viro
2019-03-13 16:44                   ` Eric Biggers
2019-03-13 19:19                     ` Al Viro
2019-03-13 19:43                       ` Eric Biggers
2019-03-13 15:30               ` Eric Biggers
2019-03-13 20:33               ` Richard Weinberger [this message]
2019-03-13 22:26                 ` Eric Biggers
2019-03-13 22:42                   ` Richard Weinberger
2019-03-14  7:34                     ` Miklos Szeredi
2019-03-14 17:15                       ` [RFC] fscrypt_key_required mount option Richard Weinberger
2019-03-14 17:15                         ` [PATCH 1/4] fscrypt: Implement FS_CFLG_OWN_D_OPS Richard Weinberger
2019-03-14 17:15                         ` [PATCH 2/4] fscrypt: Export fscrypt_d_ops Richard Weinberger
2019-03-14 17:15                         ` [PATCH 3/4] ubifs: Simplify fscrypt_get_encryption_info() error handling Richard Weinberger
2019-03-14 17:15                         ` [PATCH 4/4] ubifs: Implement new mount option, fscrypt_key_required Richard Weinberger
2019-03-14 17:49                           ` Eric Biggers
2019-03-14 20:54                             ` Richard Weinberger
2019-03-14 23:07                               ` Theodore Ts'o
2019-03-15  7:48                                 ` Richard Weinberger
2019-03-15 13:51                                   ` Theodore Ts'o
2019-03-15 13:59                                     ` Richard Weinberger
2019-03-14 23:15                           ` James Bottomley
2019-03-14 23:42                             ` Theodore Ts'o
2019-03-14 23:55                               ` James Bottomley
2019-03-13 15:01           ` overlayfs vs. fscrypt Eric Biggers
2019-03-13 16:11             ` Al Viro
2019-03-13 16:33               ` Eric Biggers

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