ceph-devel.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Eric Biggers <ebiggers@kernel.org>
To: Jeff Layton <jlayton@kernel.org>
Cc: ceph-devel@vger.kernel.org, linux-fsdevel@vger.kernel.org,
	linux-fscrypt@vger.kernel.org
Subject: Re: [RFC PATCH v2 12/18] ceph: set S_ENCRYPTED bit if new inode has encryption.ctx xattr
Date: Mon, 7 Sep 2020 21:57:37 -0700	[thread overview]
Message-ID: <20200908045737.GK68127@sol.localdomain> (raw)
In-Reply-To: <20200904160537.76663-13-jlayton@kernel.org>

On Fri, Sep 04, 2020 at 12:05:31PM -0400, Jeff Layton wrote:
> This hack fixes a chicken-and-egg problem when fetching inodes from the
> server. Once we move to a dedicated field in the inode, then this should
> be able to go away.

To clarify: while this *could* be the permanent solution, you're planning to
make ceph support storing an "is inode encrypted?" flag on the server, similar
to what the local filesystems do with i_flags (since searching the xattrs for
every inode is much more expensive than a simple flag check)?

> +#define DUMMY_ENCRYPTION_ENABLED(fsc) ((fsc)->dummy_enc_ctx.ctx != NULL)
> +

As I mentioned on an earlier patch, please put the support for the
"test_dummy_encryption" mount option in a separate patch.  It's best thought of
separately from the basic fscrypt support.

>  int ceph_fscrypt_set_ops(struct super_block *sb);
>  int ceph_fscrypt_prepare_context(struct inode *dir, struct inode *inode,
>  				 struct ceph_acl_sec_ctx *as);
>  
>  #else /* CONFIG_FS_ENCRYPTION */
>  
> +#define DUMMY_ENCRYPTION_ENABLED(fsc) (0)
> +
>  static inline int ceph_fscrypt_set_ops(struct super_block *sb)
>  {
>  	return 0;
> diff --git a/fs/ceph/inode.c b/fs/ceph/inode.c
> index 651148194316..c1c1fe2547f9 100644
> --- a/fs/ceph/inode.c
> +++ b/fs/ceph/inode.c
> @@ -964,6 +964,10 @@ int ceph_fill_inode(struct inode *inode, struct page *locked_page,
>  		ceph_forget_all_cached_acls(inode);
>  		ceph_security_invalidate_secctx(inode);
>  		xattr_blob = NULL;
> +		if ((inode->i_state & I_NEW) &&
> +		    (DUMMY_ENCRYPTION_ENABLED(mdsc->fsc) ||
> +		     ceph_inode_has_xattr(ci, CEPH_XATTR_NAME_ENCRYPTION_CONTEXT)))
> +			inode_set_flags(inode, S_ENCRYPTED, S_ENCRYPTED);

The check for DUMMY_ENCRYPTION_ENABLED() here is wrong and should be removed.
When the filesystem is mounted with test_dummy_encryption, there may be
unencrypted inodes already on-disk.  Those shouldn't get S_ENCRYPTED set.
test_dummy_encryption does add some special handling for unencrypted
directories, but that doesn't require S_ENCRYPTED to be set on them.

- Eric

  reply	other threads:[~2020-09-08  4:57 UTC|newest]

Thread overview: 59+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-09-04 16:05 [RFC PATCH v2 00/18] ceph+fscrypt: context, filename and symlink support Jeff Layton
2020-09-04 16:05 ` [RFC PATCH v2 01/18] vfs: export new_inode_pseudo Jeff Layton
2020-09-08  3:38   ` Eric Biggers
2020-09-08 11:27     ` Jeff Layton
2020-09-08 22:31       ` Eric Biggers
2020-09-09 10:47         ` Jeff Layton
2020-09-09 16:12           ` Eric Biggers
2020-09-09 16:51             ` Jeff Layton
2020-09-09 18:49               ` Eric Biggers
2020-09-09 19:24                 ` Jeff Layton
2020-09-04 16:05 ` [RFC PATCH v2 02/18] fscrypt: drop unused inode argument from fscrypt_fname_alloc_buffer Jeff Layton
2020-09-04 16:05 ` [RFC PATCH v2 03/18] fscrypt: export fscrypt_d_revalidate Jeff Layton
2020-09-04 16:05 ` [RFC PATCH v2 04/18] fscrypt: add fscrypt_new_context_from_inode Jeff Layton
2020-09-08  3:48   ` Eric Biggers
2020-09-08 11:29     ` Jeff Layton
2020-09-08 12:29     ` Jeff Layton
2020-09-08 22:34       ` Eric Biggers
2020-09-04 16:05 ` [RFC PATCH v2 05/18] fscrypt: don't balk when inode is already marked encrypted Jeff Layton
2020-09-08  3:52   ` Eric Biggers
2020-09-08 12:54     ` Jeff Layton
2020-09-08 23:08       ` Eric Biggers
2020-09-04 16:05 ` [RFC PATCH v2 06/18] fscrypt: move nokey_name conversion to separate function and export it Jeff Layton
2020-09-08  3:55   ` Eric Biggers
2020-09-08 12:50     ` Jeff Layton
2020-09-08 22:53       ` Eric Biggers
2020-09-09 16:02         ` Jeff Layton
2020-09-04 16:05 ` [RFC PATCH v2 07/18] lib: lift fscrypt base64 conversion into lib/ Jeff Layton
2020-09-08  3:59   ` Eric Biggers
2020-09-08 12:51     ` Jeff Layton
2020-09-04 16:05 ` [RFC PATCH v2 08/18] ceph: add fscrypt ioctls Jeff Layton
2020-09-04 16:05 ` [RFC PATCH v2 09/18] ceph: crypto context handling for ceph Jeff Layton
2020-09-08  4:29   ` Eric Biggers
2020-09-08 16:14     ` Jeff Layton
2020-09-04 16:05 ` [RFC PATCH v2 10/18] ceph: preallocate inode for ops that may create one Jeff Layton
2020-09-04 16:05 ` [RFC PATCH v2 11/18] ceph: add routine to create context prior to RPC Jeff Layton
2020-09-08  4:43   ` Eric Biggers
2020-09-04 16:05 ` [RFC PATCH v2 12/18] ceph: set S_ENCRYPTED bit if new inode has encryption.ctx xattr Jeff Layton
2020-09-08  4:57   ` Eric Biggers [this message]
2020-09-09 12:20     ` Jeff Layton
2020-09-09 15:53     ` Jeff Layton
2020-09-09 16:33       ` Eric Biggers
2020-09-09 17:19         ` Jeff Layton
2020-09-04 16:05 ` [RFC PATCH v2 13/18] ceph: make ceph_msdc_build_path use ref-walk Jeff Layton
2020-09-04 16:05 ` [RFC PATCH v2 14/18] ceph: add encrypted fname handling to ceph_mdsc_build_path Jeff Layton
2020-09-08  5:06   ` Eric Biggers
2020-09-09 12:24     ` Jeff Layton
2020-09-04 16:05 ` [RFC PATCH v2 15/18] ceph: make d_revalidate call fscrypt revalidator for encrypted dentries Jeff Layton
2020-09-08  5:12   ` Eric Biggers
2020-09-09 12:26     ` Jeff Layton
2020-09-09 16:18       ` Eric Biggers
2020-09-04 16:05 ` [RFC PATCH v2 16/18] ceph: add support to readdir for encrypted filenames Jeff Layton
2020-09-08  5:34   ` Eric Biggers
2020-09-09 13:02     ` Jeff Layton
2020-09-04 16:05 ` [RFC PATCH v2 17/18] ceph: add fscrypt support to ceph_fill_trace Jeff Layton
2020-09-04 16:05 ` [RFC PATCH v2 18/18] ceph: create symlinks with encrypted and base64-encoded targets Jeff Layton
2020-09-04 16:11   ` Jeff Layton
2020-09-08  5:43   ` Eric Biggers
2020-09-08  5:54 ` [RFC PATCH v2 00/18] ceph+fscrypt: context, filename and symlink support Eric Biggers
2020-09-08 12:09   ` Jeff Layton

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20200908045737.GK68127@sol.localdomain \
    --to=ebiggers@kernel.org \
    --cc=ceph-devel@vger.kernel.org \
    --cc=jlayton@kernel.org \
    --cc=linux-fscrypt@vger.kernel.org \
    --cc=linux-fsdevel@vger.kernel.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).