76 lines
2.4 KiB
C
76 lines
2.4 KiB
C
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/*
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* Copyright (c) 2001-2005 Silicon Graphics, Inc.
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* All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it would be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef __XFS_ACL_H__
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#define __XFS_ACL_H__
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struct inode;
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struct posix_acl;
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struct xfs_inode;
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#define XFS_ACL_NOT_PRESENT (-1)
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/* On-disk XFS access control list structure */
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struct xfs_acl_entry {
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__be32 ae_tag;
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__be32 ae_id;
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__be16 ae_perm;
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__be16 ae_pad; /* fill the implicit hole in the structure */
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};
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struct xfs_acl {
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__be32 acl_cnt;
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struct xfs_acl_entry acl_entry[0];
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};
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/*
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* The number of ACL entries allowed is defined by the on-disk format.
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* For v4 superblocks, that is limited to 25 entries. For v5 superblocks, it is
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* limited only by the maximum size of the xattr that stores the information.
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*/
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#define XFS_ACL_MAX_ENTRIES(mp) \
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(xfs_sb_version_hascrc(&mp->m_sb) \
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? (XATTR_SIZE_MAX - sizeof(struct xfs_acl)) / \
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sizeof(struct xfs_acl_entry) \
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: 25)
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#define XFS_ACL_MAX_SIZE(mp) \
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(sizeof(struct xfs_acl) + \
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sizeof(struct xfs_acl_entry) * XFS_ACL_MAX_ENTRIES((mp)))
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/* On-disk XFS extended attribute names */
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#define SGI_ACL_FILE (unsigned char *)"SGI_ACL_FILE"
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#define SGI_ACL_DEFAULT (unsigned char *)"SGI_ACL_DEFAULT"
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#define SGI_ACL_FILE_SIZE (sizeof(SGI_ACL_FILE)-1)
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#define SGI_ACL_DEFAULT_SIZE (sizeof(SGI_ACL_DEFAULT)-1)
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#ifdef CONFIG_XFS_POSIX_ACL
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extern struct posix_acl *xfs_get_acl(struct inode *inode, int type);
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extern int xfs_set_acl(struct inode *inode, struct posix_acl *acl, int type);
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extern int posix_acl_access_exists(struct inode *inode);
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extern int posix_acl_default_exists(struct inode *inode);
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#else
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static inline struct posix_acl *xfs_get_acl(struct inode *inode, int type)
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{
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return NULL;
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}
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# define xfs_set_acl NULL
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# define posix_acl_access_exists(inode) 0
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# define posix_acl_default_exists(inode) 0
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#endif /* CONFIG_XFS_POSIX_ACL */
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#endif /* __XFS_ACL_H__ */
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