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Date: Tue, 4 Aug 2015 13:52:58 +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, linux-cifs@...r.kernel.org,
linux-security-module@...r.kernel.org,
Andreas Gruenbacher <agruenba@...hat.com>
Subject: [RFC v6 00/40] Richacls
Hello,
here's another update of the richacl patch queue. Changes since the last
posting (https://lwn.net/Articles/652058/):
* Version 4 of the patch queue from June 24 introduced a bug when creating
files, where the owner and others would always get the permissions specified
in the owner and other permission bits of the create mode, independent of
an inheritable acl. In fact the create mode should only be an upper bound
on the permissions granted by an inherited acl, or, in the absence of an
inheritable acl, the umask. In contrast, when setting the file permission
bits with chmod, the owner and other permissions should be set to the new
mode.
This is fixed in the code by introducing an additional RICHACL_WRITE_THROUGH
flag which is set by chmod but not at file create time.
* Suport for MAY_CREATE_FILE and MAY_CREATE_DIR in nfsd.
* Some minor fixes and checkpatch cleanups.
The complete patch queue is available here:
git://git.kernel.org/pub/scm/linux/kernel/git/agruen/linux-richacl.git \
richacl-2015-08-04
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.
* 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.
* The use of GFP_ flags needs to be looked at.
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 (38):
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
nfsd: Add support for the MAY_CREATE_{FILE,DIR} permissions
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 | 218 ++++++
fs/ext4/richacl.h | 47 ++
fs/ext4/super.c | 42 +-
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 | 701 +++++++++++++-----
fs/nfs/nfs4xdr.c | 257 ++++++-
fs/nfs/super.c | 4 +-
fs/nfs_common/Makefile | 1 +
fs/nfs_common/nfs4acl.c | 44 ++
fs/nfsd/Kconfig | 1 +
fs/nfsd/acl.h | 23 +-
fs/nfsd/nfs4acl.c | 477 ++++++------
fs/nfsd/nfs4proc.c | 24 +-
fs/nfsd/nfs4xdr.c | 268 ++++---
fs/nfsd/nfsd.h | 6 +-
fs/nfsd/nfsfh.c | 8 +-
fs/nfsd/vfs.c | 28 +-
fs/nfsd/vfs.h | 17 +-
fs/nfsd/xdr4.h | 12 +-
fs/posix_acl.c | 26 +-
fs/richacl_base.c | 682 +++++++++++++++++
fs/richacl_compat.c | 927 ++++++++++++++++++++++++
fs/richacl_inode.c | 295 ++++++++
fs/richacl_xattr.c | 267 +++++++
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 | 368 ++++++++++
include/linux/richacl_compat.h | 40 +
include/linux/richacl_xattr.h | 64 ++
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 | 34 +
58 files changed, 4615 insertions(+), 725 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
--
2.5.0
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