On Wed, Mar 07, 2012 at 10:15:49AM +0800, yyq@xxxxxxxxx wrote:
> Hi,all,
> When set files/directories attributes with setfacl on XFS file
> system, we has encountered that ACL items is under the limitation of
> 23. I wonder that if XFS file system has this limitation and if can
> we exceed it?
>From fs/xfs/xfs_acl.h:
#define XFS_ACL_MAX_ENTRIES 25
....
/* On-disk XFS access control list structure */
struct xfs_acl {
__be32 acl_cnt;
struct xfs_acl_entry {
__be32 ae_tag;
__be32 ae_id;
__be16 ae_perm;
} acl_entry[XFS_ACL_MAX_ENTRIES];
};
It's basically a limitation of the on-disk format definition that
has been carried over from Irix. It is an arbitrary limit - the real
limit is the maximum size of an attribute (64KB) and we plan to
raise it to that limit as part of the upcoming on-disk format
changes for metadata checksums...
Cheers,
Dave.
--
Dave Chinner
david@xxxxxxxxxxxxx
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