Re: [RFC PATCH v11 00/51] ceph+fscrypt : full support

Jeff Layton
2022-03-25T09:58:04Z

On Tue, 2022-03-22 at 10:12 -0400, Jeff Layton wrote:
> This patchset represents a (mostly) working prototype of the
> ceph+fscrypt work. With this, I'm able run xfstests with
> test_dummy_encryption, and most of the tests that pass on ceph without
> fscrypt now pass on it.
>
> When I made the last posting of this series [1], I mentioned that proper
> support for sparse read support would be necessary to do this. Thus, the
> biggest difference from the v10 set is that this is now based on top of
> the patch series that I posted yesterday to implement sparse reads [2].
>
> Aside from that, there are also numerous cleanups all over the tree, as
> well as an overhaul of the readdir handling by Xiubo.
>
> This series is not yet bug-free, but it's at a point where it is quite
> usable, providing you're running against the Quincy release of ceph
> (which should ship sometime in the next few months).
>
> Next Steps:
> ===========
> I'm not going to sugar-coat it. This is a huge, invasive patch series
> that touches a lot of the most sensitive code in ceph.
>
> Eric Biggers has acked the changes we need in fscrypt infrastructure. I
> still need Al to ack exporting the new_inode_pseudo symbol. The rest is
> pretty much all ceph and libceph code.
>
> The main piece missing at this point is support for sparse reads with
> ms_mode settings other than "crc". Once that's complete, I want to merge
> that and this series into the ceph "testing" branch so we can start
> running tests against it in teuthology with fscrypt enabled.
>
> If that goes well, I think we could probably merge this into mainline
> for v5.20 or v5.21. There is also some incoming support for netfs write
> and DIO read helpers that we may want to convert to as well [3]. That
> may alter the timing as well.
>
> Review, comments and questions are welcome...
>
> [1]: https://lore.kernel.org/ceph-devel/20220111191608.88762-1-jlayton@kernel.org/
>
> [2]: https://lore.kernel.org/ceph-devel/20220318135013.43934-1-jlayton@kernel.org/
>
> [3]: https://lore.kernel.org/ceph-devel/YixWLJXyWtD+STvl@codewreck.org/T/#maec7e3579f13a45171ad23d7a49183d169fcfcca
>
> Jeff Layton (41):
> vfs: export new_inode_pseudo
> fscrypt: export fscrypt_base64url_encode and fscrypt_base64url_decode
> fscrypt: export fscrypt_fname_encrypt and fscrypt_fname_encrypted_size
> fscrypt: add fscrypt_context_for_new_inode
> ceph: preallocate inode for ops that may create one
> ceph: crypto context handling for ceph
> ceph: parse new fscrypt_auth and fscrypt_file fields in inode traces
> ceph: add support for fscrypt_auth/fscrypt_file to cap messages
> ceph: add ability to set fscrypt_auth via setattr
> ceph: implement -o test_dummy_encryption mount option
> ceph: decode alternate_name in lease info
> ceph: add fscrypt ioctls
> ceph: make ceph_msdc_build_path use ref-walk
> ceph: add encrypted fname handling to ceph_mdsc_build_path
> ceph: send altname in MClientRequest
> ceph: encode encrypted name in dentry release
> ceph: properly set DCACHE_NOKEY_NAME flag in lookup
> ceph: make d_revalidate call fscrypt revalidator for encrypted
> dentries
> ceph: add helpers for converting names for userland presentation
> ceph: add fscrypt support to ceph_fill_trace
> ceph: create symlinks with encrypted and base64-encoded targets
> ceph: make ceph_get_name decrypt filenames
> ceph: add a new ceph.fscrypt.auth vxattr
> ceph: add some fscrypt guardrails
> libceph: add CEPH_OSD_OP_ASSERT_VER support
> ceph: size handling for encrypted inodes in cap updates
> ceph: fscrypt_file field handling in MClientRequest messages
> ceph: get file size from fscrypt_file when present in inode traces
> ceph: handle fscrypt fields in cap messages from MDS
> ceph: add infrastructure for file encryption and decryption
> libceph: allow ceph_osdc_new_request to accept a multi-op read
> ceph: disable fallocate for encrypted inodes
> ceph: disable copy offload on encrypted inodes
> ceph: don't use special DIO path for encrypted inodes
> ceph: align data in pages in ceph_sync_write
> ceph: add read/modify/write to ceph_sync_write
> ceph: plumb in decryption during sync reads
> ceph: add fscrypt decryption support to ceph_netfs_issue_op
> ceph: set i_blkbits to crypto block size for encrypted inodes
> ceph: add encryption support to writepage
> ceph: fscrypt support for writepages
>
> Luis Henriques (1):
> ceph: don't allow changing layout on encrypted files/directories
>
> Xiubo Li (9):
> ceph: make the ioctl cmd more readable in debug log
> ceph: fix base64 encoded name's length check in ceph_fname_to_usr()
> ceph: pass the request to parse_reply_info_readdir()
> ceph: add ceph_encode_encrypted_dname() helper
> ceph: add support to readdir for encrypted filenames
> ceph: add __ceph_get_caps helper support
> ceph: add __ceph_sync_read helper support
> ceph: add object version support for sync read
> ceph: add truncate size handling support for fscrypt
>
> fs/ceph/Makefile | 1 +
> fs/ceph/acl.c | 4 +-
> fs/ceph/addr.c | 128 ++++++--
> fs/ceph/caps.c | 212 +++++++++++--
> fs/ceph/crypto.c | 432 +++++++++++++++++++++++++
> fs/ceph/crypto.h | 256 +++++++++++++++
> fs/ceph/dir.c | 182 ++++++++---
> fs/ceph/export.c | 44 ++-
> fs/ceph/file.c | 530 ++++++++++++++++++++++++++-----
> fs/ceph/inode.c | 546 +++++++++++++++++++++++++++++---
> fs/ceph/ioctl.c | 126 +++++++-
> fs/ceph/mds_client.c | 455 ++++++++++++++++++++++----
> fs/ceph/mds_client.h | 24 +-
> fs/ceph/super.c | 91 +++++-
> fs/ceph/super.h | 43 ++-
> fs/ceph/xattr.c | 29 ++
> fs/crypto/fname.c | 44 ++-
> fs/crypto/fscrypt_private.h | 9 +-
> fs/crypto/hooks.c | 6 +-
> fs/crypto/policy.c | 35 +-
> fs/inode.c | 1 +
> include/linux/ceph/ceph_fs.h | 21 +-
> include/linux/ceph/osd_client.h | 6 +-
> include/linux/ceph/rados.h | 4 +
> include/linux/fscrypt.h | 10 +
> net/ceph/osd_client.c | 32 +-
> 26 files changed, 2907 insertions(+), 364 deletions(-)
> create mode 100644 fs/ceph/crypto.c
> create mode 100644 fs/ceph/crypto.h
>

I was able to get the sparse reads working on other transports
yesterday, and I've gone ahead and updated the wip-fscrypt branch with
the newest sparse read and fscrypt changes.

For the record, the final diffstat with both patch series is:

30 files changed, 3706 insertions(+), 400 deletions(-)

I'll probably plan to move these into the testing branch next week,
after I do bit more testing locally today. Another thing we'll need to
sort out is how to enable fscrypt for teuthology tests.

As always, more testing and review would definitely be welcome.

Thanks!
--
Jeff Layton <jlayton@kernel.org>