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zfs/include/sys/xvattr.h

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/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright (c) 1988, 2010, Oracle and/or its affiliates. All rights reserved.
*/
/* Copyright (c) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */
/* All Rights Reserved */
/*
* University Copyright- Copyright (c) 1982, 1986, 1988
* The Regents of the University of California
* All Rights Reserved
*
* University Acknowledgment- Portions of this document are derived from
* software developed by the University of California, Berkeley, and its
* contributors.
*/
#ifndef _SYS_XVATTR_H
#define _SYS_XVATTR_H
#include <sys/vnode.h>
#include <sys/strings.h>
#define AV_SCANSTAMP_SZ 32 /* length of anti-virus scanstamp */
/*
* Structure of all optional attributes.
*/
typedef struct xoptattr {
inode_timespec_t xoa_createtime; /* Create time of file */
uint8_t xoa_archive;
uint8_t xoa_system;
uint8_t xoa_readonly;
uint8_t xoa_hidden;
uint8_t xoa_nounlink;
uint8_t xoa_immutable;
uint8_t xoa_appendonly;
uint8_t xoa_nodump;
uint8_t xoa_opaque;
uint8_t xoa_av_quarantined;
uint8_t xoa_av_modified;
uint8_t xoa_av_scanstamp[AV_SCANSTAMP_SZ];
uint8_t xoa_reparse;
uint64_t xoa_generation;
uint8_t xoa_offline;
uint8_t xoa_sparse;
uint8_t xoa_projinherit;
uint64_t xoa_projid;
} xoptattr_t;
/*
* The xvattr structure is really a variable length structure that
* is made up of:
* - The classic vattr_t (xva_vattr)
* - a 32 bit quantity (xva_mapsize) that specifies the size of the
* attribute bitmaps in 32 bit words.
* - A pointer to the returned attribute bitmap (needed because the
* previous element, the requested attribute bitmap) is variable length.
* - The requested attribute bitmap, which is an array of 32 bit words.
* Callers use the XVA_SET_REQ() macro to set the bits corresponding to
* the attributes that are being requested.
* - The returned attribute bitmap, which is an array of 32 bit words.
* File systems that support optional attributes use the XVA_SET_RTN()
* macro to set the bits corresponding to the attributes that are being
* returned.
* - The xoptattr_t structure which contains the attribute values
*
* xva_mapsize determines how many words in the attribute bitmaps.
* Immediately following the attribute bitmaps is the xoptattr_t.
* xva_getxoptattr() is used to get the pointer to the xoptattr_t
* section.
*/
#define XVA_MAPSIZE 3 /* Size of attr bitmaps */
#define XVA_MAGIC 0x78766174 /* Magic # for verification */
/*
* The xvattr structure is an extensible structure which permits optional
* attributes to be requested/returned. File systems may or may not support
* optional attributes. They do so at their own discretion but if they do
* support optional attributes, they must register the VFSFT_XVATTR feature
* so that the optional attributes can be set/retrieved.
*
* The fields of the xvattr structure are:
*
* xva_vattr - The first element of an xvattr is a legacy vattr structure
* which includes the common attributes. If AT_XVATTR is set in the va_mask
* then the entire structure is treated as an xvattr. If AT_XVATTR is not
* set, then only the xva_vattr structure can be used.
*
* xva_magic - 0x78766174 (hex for "xvat"). Magic number for verification.
*
* xva_mapsize - Size of requested and returned attribute bitmaps.
*
* xva_rtnattrmapp - Pointer to xva_rtnattrmap[]. We need this since the
* size of the array before it, xva_reqattrmap[], could change which means
* the location of xva_rtnattrmap[] could change. This will allow unbundled
* file systems to find the location of xva_rtnattrmap[] when the sizes change.
*
* xva_reqattrmap[] - Array of requested attributes. Attributes are
* represented by a specific bit in a specific element of the attribute
* map array. Callers set the bits corresponding to the attributes
* that the caller wants to get/set.
*
* xva_rtnattrmap[] - Array of attributes that the file system was able to
* process. Not all file systems support all optional attributes. This map
* informs the caller which attributes the underlying file system was able
* to set/get. (Same structure as the requested attributes array in terms
* of each attribute corresponding to specific bits and array elements.)
*
* xva_xoptattrs - Structure containing values of optional attributes.
* These values are only valid if the corresponding bits in xva_reqattrmap
* are set and the underlying file system supports those attributes.
*/
typedef struct xvattr {
vattr_t xva_vattr; /* Embedded vattr structure */
uint32_t xva_magic; /* Magic Number */
uint32_t xva_mapsize; /* Size of attr bitmap (32-bit words) */
uint32_t *xva_rtnattrmapp; /* Ptr to xva_rtnattrmap[] */
uint32_t xva_reqattrmap[XVA_MAPSIZE]; /* Requested attrs */
uint32_t xva_rtnattrmap[XVA_MAPSIZE]; /* Returned attrs */
xoptattr_t xva_xoptattrs; /* Optional attributes */
} xvattr_t;
/*
* Attribute bits used in the extensible attribute's (xva's) attribute
* bitmaps. Note that the bitmaps are made up of a variable length number
* of 32-bit words. The convention is to use XAT{n}_{attrname} where "n"
* is the element in the bitmap (starting at 1). This convention is for
* the convenience of the maintainer to keep track of which element each
* attribute belongs to.
*
* NOTE THAT CONSUMERS MUST *NOT* USE THE XATn_* DEFINES DIRECTLY. CONSUMERS
* MUST USE THE XAT_* DEFINES.
*/
#define XAT0_INDEX 0LL /* Index into bitmap for XAT0 attrs */
#define XAT0_CREATETIME 0x00000001 /* Create time of file */
#define XAT0_ARCHIVE 0x00000002 /* Archive */
#define XAT0_SYSTEM 0x00000004 /* System */
#define XAT0_READONLY 0x00000008 /* Readonly */
#define XAT0_HIDDEN 0x00000010 /* Hidden */
#define XAT0_NOUNLINK 0x00000020 /* Nounlink */
#define XAT0_IMMUTABLE 0x00000040 /* immutable */
#define XAT0_APPENDONLY 0x00000080 /* appendonly */
#define XAT0_NODUMP 0x00000100 /* nodump */
#define XAT0_OPAQUE 0x00000200 /* opaque */
#define XAT0_AV_QUARANTINED 0x00000400 /* anti-virus quarantine */
#define XAT0_AV_MODIFIED 0x00000800 /* anti-virus modified */
#define XAT0_AV_SCANSTAMP 0x00001000 /* anti-virus scanstamp */
#define XAT0_REPARSE 0x00002000 /* FS reparse point */
#define XAT0_GEN 0x00004000 /* object generation number */
#define XAT0_OFFLINE 0x00008000 /* offline */
#define XAT0_SPARSE 0x00010000 /* sparse */
#define XAT0_PROJINHERIT 0x00020000 /* Create with parent projid */
#define XAT0_PROJID 0x00040000 /* Project ID */
#define XAT0_ALL_ATTRS (XAT0_CREATETIME|XAT0_ARCHIVE|XAT0_SYSTEM| \
XAT0_READONLY|XAT0_HIDDEN|XAT0_NOUNLINK|XAT0_IMMUTABLE|XAT0_APPENDONLY| \
XAT0_NODUMP|XAT0_OPAQUE|XAT0_AV_QUARANTINED| XAT0_AV_MODIFIED| \
XAT0_AV_SCANSTAMP|XAT0_REPARSE|XATO_GEN|XAT0_OFFLINE|XAT0_SPARSE| \
XAT0_PROJINHERIT | XAT0_PROJID)
/* Support for XAT_* optional attributes */
#define XVA_MASK 0xffffffff /* Used to mask off 32 bits */
#define XVA_SHFT 32 /* Used to shift index */
/*
* Used to pry out the index and attribute bits from the XAT_* attributes
* defined below. Note that we're masking things down to 32 bits then
* casting to uint32_t.
*/
#define XVA_INDEX(attr) ((uint32_t)(((attr) >> XVA_SHFT) & XVA_MASK))
#define XVA_ATTRBIT(attr) ((uint32_t)((attr) & XVA_MASK))
/*
* The following defines present a "flat namespace" so that consumers don't
* need to keep track of which element belongs to which bitmap entry.
*
* NOTE THAT THESE MUST NEVER BE OR-ed TOGETHER
*/
#define XAT_CREATETIME ((XAT0_INDEX << XVA_SHFT) | XAT0_CREATETIME)
#define XAT_ARCHIVE ((XAT0_INDEX << XVA_SHFT) | XAT0_ARCHIVE)
#define XAT_SYSTEM ((XAT0_INDEX << XVA_SHFT) | XAT0_SYSTEM)
#define XAT_READONLY ((XAT0_INDEX << XVA_SHFT) | XAT0_READONLY)
#define XAT_HIDDEN ((XAT0_INDEX << XVA_SHFT) | XAT0_HIDDEN)
#define XAT_NOUNLINK ((XAT0_INDEX << XVA_SHFT) | XAT0_NOUNLINK)
#define XAT_IMMUTABLE ((XAT0_INDEX << XVA_SHFT) | XAT0_IMMUTABLE)
#define XAT_APPENDONLY ((XAT0_INDEX << XVA_SHFT) | XAT0_APPENDONLY)
#define XAT_NODUMP ((XAT0_INDEX << XVA_SHFT) | XAT0_NODUMP)
#define XAT_OPAQUE ((XAT0_INDEX << XVA_SHFT) | XAT0_OPAQUE)
#define XAT_AV_QUARANTINED ((XAT0_INDEX << XVA_SHFT) | XAT0_AV_QUARANTINED)
#define XAT_AV_MODIFIED ((XAT0_INDEX << XVA_SHFT) | XAT0_AV_MODIFIED)
#define XAT_AV_SCANSTAMP ((XAT0_INDEX << XVA_SHFT) | XAT0_AV_SCANSTAMP)
#define XAT_REPARSE ((XAT0_INDEX << XVA_SHFT) | XAT0_REPARSE)
#define XAT_GEN ((XAT0_INDEX << XVA_SHFT) | XAT0_GEN)
#define XAT_OFFLINE ((XAT0_INDEX << XVA_SHFT) | XAT0_OFFLINE)
#define XAT_SPARSE ((XAT0_INDEX << XVA_SHFT) | XAT0_SPARSE)
#define XAT_PROJINHERIT ((XAT0_INDEX << XVA_SHFT) | XAT0_PROJINHERIT)
#define XAT_PROJID ((XAT0_INDEX << XVA_SHFT) | XAT0_PROJID)
/*
* The returned attribute map array (xva_rtnattrmap[]) is located past the
* requested attribute map array (xva_reqattrmap[]). Its location changes
* when the array sizes change. We use a separate pointer in a known location
* (xva_rtnattrmapp) to hold the location of xva_rtnattrmap[]. This is
* set in xva_init()
*/
#define XVA_RTNATTRMAP(xvap) ((xvap)->xva_rtnattrmapp)
/*
* XVA_SET_REQ() sets an attribute bit in the proper element in the bitmap
* of requested attributes (xva_reqattrmap[]).
*/
#define XVA_SET_REQ(xvap, attr) \
ASSERT((xvap)->xva_vattr.va_mask & AT_XVATTR); \
ASSERT((xvap)->xva_magic == XVA_MAGIC); \
(xvap)->xva_reqattrmap[XVA_INDEX(attr)] |= XVA_ATTRBIT(attr)
/*
* XVA_CLR_REQ() clears an attribute bit in the proper element in the bitmap
* of requested attributes (xva_reqattrmap[]).
*/
#define XVA_CLR_REQ(xvap, attr) \
ASSERT((xvap)->xva_vattr.va_mask & AT_XVATTR); \
ASSERT((xvap)->xva_magic == XVA_MAGIC); \
(xvap)->xva_reqattrmap[XVA_INDEX(attr)] &= ~XVA_ATTRBIT(attr)
/*
* XVA_SET_RTN() sets an attribute bit in the proper element in the bitmap
* of returned attributes (xva_rtnattrmap[]).
*/
#define XVA_SET_RTN(xvap, attr) \
ASSERT((xvap)->xva_vattr.va_mask & AT_XVATTR); \
ASSERT((xvap)->xva_magic == XVA_MAGIC); \
(XVA_RTNATTRMAP(xvap))[XVA_INDEX(attr)] |= XVA_ATTRBIT(attr)
/*
* XVA_ISSET_REQ() checks the requested attribute bitmap (xva_reqattrmap[])
* to see of the corresponding attribute bit is set. If so, returns non-zero.
*/
#define XVA_ISSET_REQ(xvap, attr) \
((((xvap)->xva_vattr.va_mask & AT_XVATTR) && \
((xvap)->xva_magic == XVA_MAGIC) && \
((xvap)->xva_mapsize > XVA_INDEX(attr))) ? \
((xvap)->xva_reqattrmap[XVA_INDEX(attr)] & XVA_ATTRBIT(attr)) : 0)
/*
* XVA_ISSET_RTN() checks the returned attribute bitmap (xva_rtnattrmap[])
* to see of the corresponding attribute bit is set. If so, returns non-zero.
*/
#define XVA_ISSET_RTN(xvap, attr) \
((((xvap)->xva_vattr.va_mask & AT_XVATTR) && \
((xvap)->xva_magic == XVA_MAGIC) && \
((xvap)->xva_mapsize > XVA_INDEX(attr))) ? \
((XVA_RTNATTRMAP(xvap))[XVA_INDEX(attr)] & XVA_ATTRBIT(attr)) : 0)
/*
* Zero out the structure, set the size of the requested/returned bitmaps,
* set AT_XVATTR in the embedded vattr_t's va_mask, and set up the pointer
* to the returned attributes array.
*/
static inline void
xva_init(xvattr_t *xvap)
{
bzero(xvap, sizeof (xvattr_t));
xvap->xva_mapsize = XVA_MAPSIZE;
xvap->xva_magic = XVA_MAGIC;
xvap->xva_vattr.va_mask = ATTR_XVATTR;
xvap->xva_rtnattrmapp = &(xvap->xva_rtnattrmap)[0];
}
/*
* If AT_XVATTR is set, returns a pointer to the embedded xoptattr_t
* structure. Otherwise, returns NULL.
*/
static inline xoptattr_t *
xva_getxoptattr(xvattr_t *xvap)
{
xoptattr_t *xoap = NULL;
if (xvap->xva_vattr.va_mask & AT_XVATTR)
xoap = &xvap->xva_xoptattrs;
return (xoap);
}
#define MODEMASK 07777 /* mode bits plus permission bits */
#define PERMMASK 00777 /* permission bits */
/*
* VOP_ACCESS flags
*/
#define V_ACE_MASK 0x1 /* mask represents NFSv4 ACE permissions */
#define V_APPEND 0x2 /* want to do append only check */
/*
* Structure used on VOP_GETSECATTR and VOP_SETSECATTR operations
*/
typedef struct vsecattr {
uint_t vsa_mask; /* See below */
int vsa_aclcnt; /* ACL entry count */
void *vsa_aclentp; /* pointer to ACL entries */
int vsa_dfaclcnt; /* default ACL entry count */
void *vsa_dfaclentp; /* pointer to default ACL entries */
size_t vsa_aclentsz; /* ACE size in bytes of vsa_aclentp */
uint_t vsa_aclflags; /* ACE ACL flags */
} vsecattr_t;
/* vsa_mask values */
#define VSA_ACL 0x0001
#define VSA_ACLCNT 0x0002
#define VSA_DFACL 0x0004
#define VSA_DFACLCNT 0x0008
#define VSA_ACE 0x0010
#define VSA_ACECNT 0x0020
#define VSA_ACE_ALLTYPES 0x0040
#define VSA_ACE_ACLFLAGS 0x0080 /* get/set ACE ACL flags */
#endif /* _SYS_XVATTR_H */
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