331b6cc0ea
Improve support for writing to XFS partitions. Work done by: Russell Cattelan <cattelan at xfs dot org>
103 lines
3.4 KiB
C
103 lines
3.4 KiB
C
/*
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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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/*
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* Access Control Lists
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*/
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typedef __uint16_t xfs_acl_perm_t;
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typedef __int32_t xfs_acl_type_t;
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typedef __int32_t xfs_acl_tag_t;
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typedef __int32_t xfs_acl_id_t;
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#define XFS_ACL_MAX_ENTRIES 25
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#define XFS_ACL_NOT_PRESENT (-1)
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typedef struct xfs_acl_entry {
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xfs_acl_tag_t ae_tag;
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xfs_acl_id_t ae_id;
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xfs_acl_perm_t ae_perm;
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} xfs_acl_entry_t;
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typedef struct xfs_acl {
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__int32_t acl_cnt;
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xfs_acl_entry_t acl_entry[XFS_ACL_MAX_ENTRIES];
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} xfs_acl_t;
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/* On-disk XFS extended attribute names */
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#define SGI_ACL_FILE "SGI_ACL_FILE"
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#define SGI_ACL_DEFAULT "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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struct vattr;
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struct vnode;
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struct xfs_inode;
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extern struct kmem_zone *xfs_acl_zone;
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#define xfs_acl_zone_init(zone, name) \
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(zone) = kmem_zone_init(sizeof(xfs_acl_t), (name))
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#define xfs_acl_zone_destroy(zone) kmem_zone_destroy(zone)
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extern int xfs_acl_inherit(struct vnode *, struct vattr *, xfs_acl_t *);
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extern int xfs_acl_iaccess(struct xfs_inode *, mode_t, cred_t *);
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extern int xfs_acl_vtoacl(struct vnode *, xfs_acl_t *, xfs_acl_t *);
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extern int xfs_acl_vhasacl_access(struct vnode *);
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extern int xfs_acl_vhasacl_default(struct vnode *);
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extern int xfs_acl_vset(struct vnode *, void *, size_t, int);
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extern int xfs_acl_vget(struct vnode *, void *, size_t, int);
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extern int xfs_acl_vremove(struct vnode *vp, int);
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#define _ACL_TYPE_ACCESS 1
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#define _ACL_TYPE_DEFAULT 2
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#define _ACL_PERM_INVALID(perm) ((perm) & ~(ACL_READ|ACL_WRITE|ACL_EXECUTE))
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#define _ACL_INHERIT(c,v,d) (xfs_acl_inherit(c,v,d))
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#define _ACL_GET_ACCESS(pv,pa) (xfs_acl_vtoacl(pv,pa,NULL) == 0)
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#define _ACL_GET_DEFAULT(pv,pd) (xfs_acl_vtoacl(pv,NULL,pd) == 0)
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#define _ACL_ACCESS_EXISTS xfs_acl_vhasacl_access
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#define _ACL_DEFAULT_EXISTS xfs_acl_vhasacl_default
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#define _ACL_XFS_IACCESS(i,m,c) (XFS_IFORK_Q(i) ? xfs_acl_iaccess(i,m,c) : -1)
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#define _ACL_ALLOC(a) ((a) = kmem_zone_alloc(xfs_acl_zone, KM_SLEEP))
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#define _ACL_FREE(a) ((a)? kmem_zone_free(xfs_acl_zone, (a)):(void)0)
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#else
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#define xfs_acl_zone_init(zone,name)
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#define xfs_acl_zone_destroy(zone)
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#define xfs_acl_vset(v,p,sz,t) (-EOPNOTSUPP)
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#define xfs_acl_vget(v,p,sz,t) (-EOPNOTSUPP)
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#define xfs_acl_vremove(v,t) (-EOPNOTSUPP)
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#define xfs_acl_vhasacl_access(v) (0)
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#define xfs_acl_vhasacl_default(v) (0)
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#define _ACL_ALLOC(a) (1) /* successfully allocate nothing */
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#define _ACL_FREE(a) ((void)0)
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#define _ACL_INHERIT(c,v,d) (0)
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#define _ACL_GET_ACCESS(pv,pa) (0)
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#define _ACL_GET_DEFAULT(pv,pd) (0)
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#define _ACL_ACCESS_EXISTS (NULL)
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#define _ACL_DEFAULT_EXISTS (NULL)
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#define _ACL_XFS_IACCESS(i,m,c) (-1)
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#endif
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#endif /* __XFS_ACL_H__ */
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