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Date: Wed, 22 Jul 2015 15:02:50 +0200
From: Andreas Gruenbacher <andreas.gruenbacher@...il.com>
To: linux-kernel@...r.kernel.org
Cc: linux-fsdevel@...r.kernel.org, linux-nfs@...r.kernel.org,
linux-api@...r.kernel.org, samba-technical@...ts.samba.org,
linux-security-module@...r.kernel.org,
Andreas Gruenbacher <agruenba@...hat.com>
Subject: [PATCH v5 00/39] Richacls
From: Andreas Gruenbacher <agruenba@...hat.com>
Hello,
here's another update of the richacl patch queue. Changes since the last
posting (https://lwn.net/Articles/649287/):
* Support for user and group identifiers which don't have a uid/gid
mapping. Those identifiers are only meaningful for nfs so far; smbfs
would be a logical next candidate (for Windows SIDs instead of NFSv4
identifiers in that case). Storing those identifiers on a local file system
is not allowed.
* New xattr representation for supporting unmapped identifiers: they are stored
as a list of NUL-terminated strings at the end of the acl, with one string
for each acl entry that has an unmapped identifier.
* Changes to the nfs patches: acls are now encoded above the sunrpc
layer. This means we can no longer encode small acls directly into the
scratch area of an xdr_buf, we always have to allocate extra memory.
But we also don't need to touch the nfs sunrpc code, which Trond objected
to.
The complete patch queue is available here:
git://git.kernel.org/pub/scm/linux/kernel/git/agruen/linux-richacl.git \
richacl-2015-07-22
Open issues in nfs:
* When a user or group name cannot be mapped, nfs's idmapper always
maps it to nobody. That's good enough for mapping the file owner and
owning group, but not for identifiers in acls. For now, to get the nfs
richacl support somewhat working, I'm explicitly checking if mapping
has resulted in uid/gid 99 in the kernel.
* nfs: When the nfs server replies with NFS4ERR_BADNAME for any
user or group name lookup, the client will stop sending numeric uids
and gids to the server even when the lookup wasn't numeric.
From then on, the client will translate uids and gids that have no
mapping to the string "nobody", and the server will reject them.
This problem is not specific to acls.
Other open issues:
* It would be nice if the MAY_DELETE_SELF flag could override the sticky
directory check as it did in the previous version of this patch queue. I
couldn't come up with a clean way of achieving that.
Thanks,
Andreas
Andreas Gruenbacher (37):
vfs: Add IS_ACL() and IS_RICHACL() tests
vfs: Add MAY_CREATE_FILE and MAY_CREATE_DIR permission flags
vfs: Add MAY_DELETE_SELF and MAY_DELETE_CHILD permission flags
vfs: Make the inode passed to inode_change_ok non-const
vfs: Add permission flags for setting file attributes
richacl: In-memory representation and helper functions
richacl: Permission mapping functions
richacl: Compute maximum file masks from an acl
richacl: Update the file masks in chmod()
richacl: Permission check algorithm
vfs: Cache base_acl objects in inodes
vfs: Cache richacl in struct inode
richacl: Check if an acl is equivalent to a file mode
richacl: Create-time inheritance
richacl: Automatic Inheritance
richacl: xattr mapping functions
vfs: Add richacl permission checking
richacl: acl editing helper functions
richacl: Move everyone@ aces down the acl
richacl: Propagate everyone@ permissions to other aces
richacl: Set the owner permissions to the owner mask
richacl: Set the other permissions to the other mask
richacl: Isolate the owner and group classes
richacl: Apply the file masks to a richacl
richacl: Create richacl from mode values
nfsd: Keep list of acls to dispose of in compoundargs
nfsd: Use richacls as internal acl representation
nfsd: Add richacl support
nfsd: Add support for the v4.1 dacl attribute
richacl: Add support for unmapped identifiers
ext4: Don't allow unmapped identifiers in richacls
sunrpc: Allow to demand-allocate pages to encode into
sunrpc: Add xdr_init_encode_pages
nfs: Fix GETATTR bitmap verification
nfs: Remove unused xdr page offsets in getacl/setacl arguments
nfs: Add richacl support
nfs: Add support for the v4.1 dacl attribute
Aneesh Kumar K.V (2):
ext4: Add richacl support
ext4: Add richacl feature flag
drivers/staging/lustre/lustre/llite/llite_lib.c | 2 +-
fs/Kconfig | 9 +
fs/Makefile | 3 +
fs/attr.c | 81 ++-
fs/ext4/Kconfig | 15 +
fs/ext4/Makefile | 1 +
fs/ext4/acl.c | 6 +-
fs/ext4/acl.h | 12 +-
fs/ext4/ext4.h | 6 +-
fs/ext4/file.c | 6 +-
fs/ext4/ialloc.c | 7 +-
fs/ext4/inode.c | 10 +-
fs/ext4/namei.c | 11 +-
fs/ext4/richacl.c | 217 ++++++
fs/ext4/richacl.h | 47 ++
fs/ext4/super.c | 41 +-
fs/ext4/xattr.c | 6 +
fs/ext4/xattr.h | 1 +
fs/f2fs/acl.c | 4 +-
fs/inode.c | 15 +-
fs/namei.c | 108 ++-
fs/nfs/inode.c | 3 -
fs/nfs/nfs4proc.c | 696 +++++++++++++-----
fs/nfs/nfs4xdr.c | 259 ++++++-
fs/nfs/super.c | 4 +-
fs/nfs_common/Makefile | 1 +
fs/nfs_common/nfs4acl.c | 41 ++
fs/nfsd/Kconfig | 1 +
fs/nfsd/acl.h | 23 +-
fs/nfsd/nfs4acl.c | 483 +++++++------
fs/nfsd/nfs4proc.c | 19 +-
fs/nfsd/nfs4xdr.c | 267 ++++---
fs/nfsd/nfsd.h | 6 +-
fs/nfsd/xdr4.h | 12 +-
fs/posix_acl.c | 26 +-
fs/richacl_base.c | 669 ++++++++++++++++++
fs/richacl_compat.c | 901 ++++++++++++++++++++++++
fs/richacl_inode.c | 262 +++++++
fs/richacl_xattr.c | 249 +++++++
fs/xattr.c | 34 +-
include/linux/fs.h | 50 +-
include/linux/nfs4.h | 24 +-
include/linux/nfs4acl.h | 7 +
include/linux/nfs_fs.h | 1 -
include/linux/nfs_fs_sb.h | 2 +
include/linux/nfs_xdr.h | 13 +-
include/linux/posix_acl.h | 12 +-
include/linux/richacl.h | 366 ++++++++++
include/linux/richacl_compat.h | 40 ++
include/linux/richacl_xattr.h | 52 ++
include/linux/sunrpc/xdr.h | 2 +
include/uapi/linux/fs.h | 3 +-
include/uapi/linux/nfs4.h | 3 +-
include/uapi/linux/xattr.h | 2 +
net/sunrpc/xdr.c | 33 +
55 files changed, 4465 insertions(+), 709 deletions(-)
create mode 100644 fs/ext4/richacl.c
create mode 100644 fs/ext4/richacl.h
create mode 100644 fs/nfs_common/nfs4acl.c
create mode 100644 fs/richacl_base.c
create mode 100644 fs/richacl_compat.c
create mode 100644 fs/richacl_inode.c
create mode 100644 fs/richacl_xattr.c
create mode 100644 include/linux/nfs4acl.h
create mode 100644 include/linux/richacl.h
create mode 100644 include/linux/richacl_compat.h
create mode 100644 include/linux/richacl_xattr.h
--
2.4.3
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