On Fri, Sep 24, 2010 at 06:18:03PM +0530, Aneesh Kumar K.V wrote: > > Hi, > > The following set of patches implements VFS changes needed to implement > a new acl model for linux. Rich ACLs are an implementation of NFSv4 ACLs, > extended by file masks to fit into the standard POSIX file permission model. > They are designed to work seamlessly locally as well as across the NFSv4 and > CIFS/SMB2 network file system protocols. > > The patch set consists of four parts: > > The first set of patches, posted as a follow up, contains VFS changes needed > to implement the Rich ACL model. The second set [1] contains the Rich ACL model > and Ext4 implementation. The third set [2] contains mapping of Rich ACL to > NFSv4 ACL (how to apply file mask to access mask) and implementation of > Richacl ACL for NFS server and client. That's the part I'd like to review carefully and haven't yet. > The fourth set [3] contains POSIX ACL > to Rich ACL mapping and its ext4 usage. The one thing I remember not liking before was a flag that told the user whether a given ACL was originally mapped from POSIX or not. Is that still there? Overall I'm for doing this: I don't like NFSv4/Windows ACLs more than anyone else, but they're too useful to ignore, and the mapping that Samba and the NFSv4 server try to do is painful for users. --b. > > [1] git://git.kernel.org/pub/scm/linux/kernel/git/agruen/linux-2.6-richacl.git richacl-minimal > [2] git://git.kernel.org/pub/scm/linux/kernel/git/agruen/linux-2.6-richacl.git richacl-upstream > [3] git://git.kernel.org/pub/scm/linux/kernel/git/agruen/linux-2.6-richacl.git richacl-fullset > > A user-space utility for displaying and changing richacls is available at [4] > (a number of examples can be found at http://acl.bestbits.at/richacl/examples.html). > > [4] git://git.kernel.org/pub/scm/linux/kernel/git/agruen/richacl.git master > > To test richacl on ext4 use -o richacl mount option. This mount option may later be > dropped in favour of a feature flag. > > More details regarding richacl can be found at > http://acl.bestbits.at/richacl/ > > Changes from V3: > a) Droped may_delete and may_create inode operations callback and reworked > the patch series to use additional check flags. > b) Rebased to the latest kernel > c) The patch series now contain only the minimal VFS changes. > > Changes from V2: > 1) Git repo include check-acl branch that drop newly added inode_operations > callback in favour for additional access check flags (MAY_CREATE_FILE, > MAY_CREATE_DIR, MAY_DELETE_CHILD, MAY_DELETE_SELF, MAY_TAKE_OWNERSHIP, > MAY_CHMOD, and MAY_SET_TIMES) > 2) richacl is now cached in the vfs inode instead of file system inode. > (currently kept as a separate patch. We may want to fold that later) > 3) Added a new acl flag ACL4_MASKED. richacl_apply_masks() can skip transforming acls > without this flag, which speeds things up and avoids modifying those acls unnecessarily. > 4) Owner always allowed permissions are now explicitly included when synthesizing an acl > from file mode. > > Changes from V1: > 1) Split the patches into smaller patches > 2) Added extensive documentation to the patches. > > -aneesh > > -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
