[RFC v6 00/40] Richacls

[Andreas Gruenbacher <andreas.gruenbacher@gmail.com>]

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