[RFC PATCH v6 00/20] ceph+fscrypt: context, filename and symlink support

Jeff Layton
2021-04-13T17:50:55Z

The main change in this posting is in the detection of fscrypted inodes.
The older set would grovel around in the xattr blob to see if it had an
"encryption.ctx" xattr. This was problematic if the MDS didn't send
xattrs in the trace, and not very efficient.

This posting changes it to use the new "fscrypt" flag, which should
always be reported by the MDS (Luis, I'm hoping this may fix the issues
you were seeing with dcache coherency).

This unfortunately requires an MDS fix, but that should hopefully make
it in and be backported to Pacific fairly soon:

https://github.com/ceph/ceph/pull/40828

We also now handle get_name in the NFS export code correctly.

Aside from that, there are better changelogs, particularly on the
fscrypt and vfs patches, and some smaller bugfixes and optimizations.

Jeff Layton (20):
vfs: export new_inode_pseudo
fscrypt: export fscrypt_base64_encode and fscrypt_base64_decode
fscrypt: export fscrypt_fname_encrypt and fscrypt_fname_encrypted_size
fscrypt: add fscrypt_context_for_new_inode
ceph: crypto context handling for ceph
ceph: implement -o test_dummy_encryption mount option
ceph: preallocate inode for ops that may create one
ceph: add routine to create fscrypt context prior to RPC
ceph: make ceph_msdc_build_path use ref-walk
ceph: add encrypted fname handling to ceph_mdsc_build_path
ceph: decode alternate_name in lease info
ceph: send altname in MClientRequest
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: add support to readdir for encrypted filenames
ceph: create symlinks with encrypted and base64-encoded targets
ceph: make ceph_get_name decrypt filenames
ceph: add fscrypt ioctls

fs/ceph/Makefile | 1 +
fs/ceph/crypto.c | 185 ++++++++++++++++++++++
fs/ceph/crypto.h | 101 ++++++++++++
fs/ceph/dir.c | 178 ++++++++++++++++-----
fs/ceph/export.c | 42 +++--
fs/ceph/file.c | 58 ++++---
fs/ceph/inode.c | 248 ++++++++++++++++++++++++++---
fs/ceph/ioctl.c | 93 +++++++++++
fs/ceph/mds_client.c | 303 ++++++++++++++++++++++++++++++------
fs/ceph/mds_client.h | 15 +-
fs/ceph/super.c | 80 +++++++++-
fs/ceph/super.h | 15 +-
fs/ceph/xattr.c | 5 +
fs/crypto/fname.c | 53 +++++--
fs/crypto/fscrypt_private.h | 9 +-
fs/crypto/hooks.c | 6 +-
fs/crypto/policy.c | 34 +++-
fs/inode.c | 1 +
include/linux/fscrypt.h | 10 ++
19 files changed, 1263 insertions(+), 174 deletions(-)
create mode 100644 fs/ceph/crypto.c
create mode 100644 fs/ceph/crypto.h

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2.30.2