xnu-2782.10.72.tar.gz

[apple/xnu.git] / bsd / sys / attr.h

/*
 * Copyright (c) 2000-2010 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
 * 
 * This file contains Original Code and/or Modifications of Original Code
 * as defined in and that are subject to the Apple Public Source License
 * Version 2.0 (the 'License'). You may not use this file except in
 * compliance with the License. The rights granted to you under the License
 * may not be used to create, or enable the creation or redistribution of,
 * unlawful or unlicensed copies of an Apple operating system, or to
 * circumvent, violate, or enable the circumvention or violation of, any
 * terms of an Apple operating system software license agreement.
 * 
 * Please obtain a copy of the License at
 * http://www.opensource.apple.com/apsl/ and read it before using this file.
 * 
 * The Original Code and all software distributed under the License are
 * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
 * Please see the License for the specific language governing rights and
 * limitations under the License.
 * 
 * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
 */

/*
 * attr.h - attribute data structures and interfaces
 *
 * Copyright (c) 1998, Apple Computer, Inc.  All Rights Reserved.
 */

#ifndef _SYS_ATTR_H_
#define _SYS_ATTR_H_

#include <sys/appleapiopts.h>

#ifdef __APPLE_API_UNSTABLE
#include <sys/types.h>
#include <sys/ucred.h>
#include <sys/time.h>
#include <sys/cdefs.h>

#define FSOPT_NOFOLLOW 		0x00000001
#define FSOPT_NOINMEMUPDATE 	0x00000002
#define FSOPT_REPORT_FULLSIZE	0x00000004
/* The following option only valid when requesting ATTR_CMN_RETURNED_ATTRS */
#define FSOPT_PACK_INVAL_ATTRS	0x00000008

#ifdef PRIVATE
#define FSOPT_EXCHANGE_DATA_ONLY 0x0000010
#endif

#define FSOPT_ATTR_CMN_EXTENDED	0x00000020

/* we currently aren't anywhere near this amount for a valid
 * fssearchblock.sizeofsearchparams1 or fssearchblock.sizeofsearchparams2
 * but we put a sanity check in to avoid abuse of the value passed in from
 * user land.
 */
#define SEARCHFS_MAX_SEARCHPARMS  4096

typedef u_int32_t text_encoding_t;

typedef u_int32_t fsobj_type_t;

typedef u_int32_t fsobj_tag_t;

typedef u_int32_t fsfile_type_t;

typedef u_int32_t fsvolid_t;

typedef struct fsobj_id {
	u_int32_t		fid_objno;
	u_int32_t		fid_generation;
} fsobj_id_t;

typedef u_int32_t attrgroup_t;

struct attrlist {
	u_short bitmapcount;			/* number of attr. bit sets in list (should be 5) */
	u_int16_t reserved;			/* (to maintain 4-byte alignment) */
	attrgroup_t commonattr;			/* common attribute group */
	attrgroup_t volattr;			/* Volume attribute group */
	attrgroup_t dirattr;			/* directory attribute group */
	attrgroup_t fileattr;			/* file attribute group */
	attrgroup_t forkattr;			/* fork attribute group */
};
#define ATTR_BIT_MAP_COUNT 5

typedef struct attribute_set {
	attrgroup_t commonattr;			/* common attribute group */
	attrgroup_t volattr;			/* Volume attribute group */
	attrgroup_t dirattr;			/* directory attribute group */
	attrgroup_t fileattr;			/* file attribute group */
	attrgroup_t forkattr;			/* fork attribute group */
} attribute_set_t;

typedef struct attrreference {
	int32_t     attr_dataoffset;
	u_int32_t   attr_length;
} attrreference_t;

/* XXX PPD This is derived from HFSVolumePriv.h and should perhaps be referenced from there? */

struct diskextent {
	u_int32_t					startblock;				/* first block allocated */
	u_int32_t					blockcount;				/* number of blocks allocated */
};

typedef struct diskextent extentrecord[8];

typedef u_int32_t vol_capabilities_set_t[4];

#define VOL_CAPABILITIES_FORMAT 0
#define VOL_CAPABILITIES_INTERFACES 1
#define VOL_CAPABILITIES_RESERVED1 2
#define VOL_CAPABILITIES_RESERVED2 3

typedef struct vol_capabilities_attr {
	vol_capabilities_set_t capabilities;
	vol_capabilities_set_t valid;
} vol_capabilities_attr_t;

/*
 * XXX this value needs to be raised - 3893388
 */
#define ATTR_MAX_BUFFER		8192

/*
 * VOL_CAP_FMT_PERSISTENTOBJECTIDS: When set, the volume has object IDs
 * that are persistent (retain their values even when the volume is
 * unmounted and remounted), and a file or directory can be looked up
 * by ID.  Volumes that support VolFS and can support Carbon File ID
 * references should set this bit.
 *
 * VOL_CAP_FMT_SYMBOLICLINKS: When set, the volume supports symbolic
 * links.  The symlink(), readlink(), and lstat() calls all use this
 * symbolic link.
 *
 * VOL_CAP_FMT_HARDLINKS: When set, the volume supports hard links.
 * The link() call creates hard links.
 *
 * VOL_CAP_FMT_JOURNAL: When set, the volume is capable of supporting
 * a journal used to speed recovery in case of unplanned shutdown
 * (such as a power outage or crash).  This bit does not necessarily
 * mean the volume is actively using a journal for recovery.
 *
 * VOL_CAP_FMT_JOURNAL_ACTIVE: When set, the volume is currently using
 * a journal for use in speeding recovery after an unplanned shutdown.
 * This bit can be set only if VOL_CAP_FMT_JOURNAL is also set.
 *
 * VOL_CAP_FMT_NO_ROOT_TIMES: When set, the volume format does not
 * store reliable times for the root directory, so you should not
 * depend on them to detect changes, etc.
 *
 * VOL_CAP_FMT_SPARSE_FILES: When set, the volume supports sparse files.
 * That is, files which can have "holes" that have never been written
 * to, and are not allocated on disk.  Sparse files may have an
 * allocated size that is less than the file's logical length.
 *
 * VOL_CAP_FMT_ZERO_RUNS: For security reasons, parts of a file (runs)
 * that have never been written to must appear to contain zeroes.  When
 * this bit is set, the volume keeps track of allocated but unwritten
 * runs of a file so that it can substitute zeroes without actually
 * writing zeroes to the media.  This provides performance similar to
 * sparse files, but not the space savings.
 *
 * VOL_CAP_FMT_CASE_SENSITIVE: When set, file and directory names are
 * case sensitive (upper and lower case are different).  When clear,
 * an upper case character is equivalent to a lower case character,
 * and you can't have two names that differ solely in the case of
 * the characters.
 *
 * VOL_CAP_FMT_CASE_PRESERVING: When set, file and directory names
 * preserve the difference between upper and lower case.  If clear,
 * the volume may change the case of some characters (typically
 * making them all upper or all lower case).  A volume that sets
 * VOL_CAP_FMT_CASE_SENSITIVE should also set VOL_CAP_FMT_CASE_PRESERVING.
 *
 * VOL_CAP_FMT_FAST_STATFS: This bit is used as a hint to upper layers
 * (especially Carbon) that statfs() is fast enough that its results
 * need not be cached by those upper layers.  A volume that caches
 * the statfs information in its in-memory structures should set this bit.
 * A volume that must always read from disk or always perform a network
 * transaction should not set this bit.  
 * 
 * VOL_CAP_FMT_2TB_FILESIZE: If this bit is set the volume format supports
 * file sizes larger than 4GB, and potentially up to 2TB; it does not
 * indicate whether the filesystem supports files larger than that.
 *
 * VOL_CAP_FMT_OPENDENYMODES: When set, the volume supports open deny
 * modes (e.g. "open for read write, deny write"; effectively, mandatory
 * file locking based on open modes).
 *
 * VOL_CAP_FMT_HIDDEN_FILES: When set, the volume supports the UF_HIDDEN
 * file flag, and the UF_HIDDEN flag is mapped to that volume's native
 * "hidden" or "invisible" bit (which may be the invisible bit from the
 * Finder Info extended attribute).
 *
 * VOL_CAP_FMT_PATH_FROM_ID:  When set, the volume supports the ability
 * to derive a pathname to the root of the file system given only the
 * id of an object.  This also implies that object ids on this file
 * system are persistent and not recycled.  This is a very specialized
 * capability and it is assumed that most file systems will not support
 * it.  Its use is for legacy non-posix APIs like ResolveFileIDRef.
 * 
 * VOL_CAP_FMT_NO_VOLUME_SIZES: When set, the volume does not support 
 * returning values for total data blocks, available blocks, or free blocks
 * (as in f_blocks, f_bavail, or f_bfree in "struct statfs").  Historically,
 * those values were set to 0xFFFFFFFF for volumes that did not support them.
 * 
 * VOL_CAP_FMT_DECMPFS_COMPRESSION: When set, the volume supports transparent
 * decompression of compressed files using decmpfs.
 *
 * VOL_CAP_FMT_64BIT_OBJECT_IDS: When set, the volume uses object IDs that
 * are 64-bit. This means that ATTR_CMN_FILEID and ATTR_CMN_PARENTID are the
 * only legitimate attributes for obtaining object IDs from this volume and the
 * 32-bit fid_objno fields of the fsobj_id_t returned by ATTR_CMN_OBJID,
 * ATTR_CMN_OBJPERMID, and ATTR_CMN_PAROBJID are undefined.
 */
#define VOL_CAP_FMT_PERSISTENTOBJECTIDS		0x00000001
#define VOL_CAP_FMT_SYMBOLICLINKS 		0x00000002
#define VOL_CAP_FMT_HARDLINKS      		0x00000004
#define VOL_CAP_FMT_JOURNAL       		0x00000008
#define VOL_CAP_FMT_JOURNAL_ACTIVE 		0x00000010
#define VOL_CAP_FMT_NO_ROOT_TIMES 		0x00000020
#define VOL_CAP_FMT_SPARSE_FILES 		0x00000040
#define VOL_CAP_FMT_ZERO_RUNS     		0x00000080
#define VOL_CAP_FMT_CASE_SENSITIVE 		0x00000100
#define VOL_CAP_FMT_CASE_PRESERVING		0x00000200
#define VOL_CAP_FMT_FAST_STATFS 		0x00000400
#define VOL_CAP_FMT_2TB_FILESIZE		0x00000800
#define VOL_CAP_FMT_OPENDENYMODES		0x00001000
#define VOL_CAP_FMT_HIDDEN_FILES		0x00002000
#define VOL_CAP_FMT_PATH_FROM_ID		0x00004000
#define VOL_CAP_FMT_NO_VOLUME_SIZES		0x00008000
#define VOL_CAP_FMT_DECMPFS_COMPRESSION		0x00010000
#define VOL_CAP_FMT_64BIT_OBJECT_IDS		0x00020000


/*
 * VOL_CAP_INT_SEARCHFS: When set, the volume implements the
 * searchfs() system call (the vnop_searchfs vnode operation).
 *
 * VOL_CAP_INT_ATTRLIST: When set, the volume implements the
 * getattrlist() and setattrlist() system calls (vnop_getattrlist
 * and vnop_setattrlist vnode operations) for the volume, files,
 * and directories.  The volume may or may not implement the
 * readdirattr() system call.  XXX Is there any minimum set
 * of attributes that should be supported?  To determine the
 * set of supported attributes, get the ATTR_VOL_ATTRIBUTES
 * attribute of the volume.
 *
 * VOL_CAP_INT_NFSEXPORT: When set, the volume implements exporting
 * of NFS volumes.
 *
 * VOL_CAP_INT_READDIRATTR: When set, the volume implements the
 * readdirattr() system call (vnop_readdirattr vnode operation).
 *
 * VOL_CAP_INT_EXCHANGEDATA: When set, the volume implements the
 * exchangedata() system call (VNOP_EXCHANGE vnode operation).
 *
 * VOL_CAP_INT_COPYFILE: When set, the volume implements the
 * VOP_COPYFILE vnode operation.  (XXX There should be a copyfile()
 * system call in <unistd.h>.)
 *
 * VOL_CAP_INT_ALLOCATE: When set, the volume implements the
 * VNOP_ALLOCATE vnode operation, which means it implements the
 * F_PREALLOCATE selector of fcntl(2).
 *
 * VOL_CAP_INT_VOL_RENAME: When set, the volume implements the
 * ATTR_VOL_NAME attribute for both getattrlist() and setattrlist().
 * The volume can be renamed by setting ATTR_VOL_NAME with setattrlist().
 *
 * VOL_CAP_INT_ADVLOCK: When set, the volume implements POSIX style
 * byte range locks via vnop_advlock (accessible from fcntl(2)).
 *
 * VOL_CAP_INT_FLOCK: When set, the volume implements whole-file flock(2)
 * style locks via vnop_advlock.  This includes the O_EXLOCK and O_SHLOCK
 * flags of the open(2) call.
 *
 * VOL_CAP_INT_EXTENDED_SECURITY: When set, the volume implements
 * extended security (ACLs).
 *
 * VOL_CAP_INT_USERACCESS:  When set, the volume supports the
 * ATTR_CMN_USERACCESS attribute (used to get the user's access
 * mode to the file).
 *
 * VOL_CAP_INT_MANLOCK: When set, the volume supports AFP-style
 * mandatory byte range locks via an ioctl().
 *
 * VOL_CAP_INT_EXTENDED_ATTR: When set, the volume implements
 * native extended attribues.
 *
 * VOL_CAP_INT_NAMEDSTREAMS: When set, the volume supports
 * native named streams.
 */
#define VOL_CAP_INT_SEARCHFS			0x00000001
#define VOL_CAP_INT_ATTRLIST			0x00000002
#define VOL_CAP_INT_NFSEXPORT			0x00000004
#define VOL_CAP_INT_READDIRATTR			0x00000008
#define VOL_CAP_INT_EXCHANGEDATA		0x00000010
#define VOL_CAP_INT_COPYFILE			0x00000020
#define VOL_CAP_INT_ALLOCATE			0x00000040
#define VOL_CAP_INT_VOL_RENAME			0x00000080
#define VOL_CAP_INT_ADVLOCK			0x00000100
#define VOL_CAP_INT_FLOCK			0x00000200
#define VOL_CAP_INT_EXTENDED_SECURITY		0x00000400
#define VOL_CAP_INT_USERACCESS			0x00000800
#define VOL_CAP_INT_MANLOCK			0x00001000
#define VOL_CAP_INT_NAMEDSTREAMS		0x00002000
#define VOL_CAP_INT_EXTENDED_ATTR		0x00004000
#ifdef PRIVATE
/* Volume supports kqueue notifications for remote events */
#define VOL_CAP_INT_REMOTE_EVENT		0x00008000
#endif /* PRIVATE */

typedef struct vol_attributes_attr {
	attribute_set_t validattr;
	attribute_set_t nativeattr;
} vol_attributes_attr_t;

#define ATTR_CMN_NAME				0x00000001
#define ATTR_CMN_DEVID				0x00000002
#define ATTR_CMN_FSID				0x00000004
#define ATTR_CMN_OBJTYPE			0x00000008
#define ATTR_CMN_OBJTAG				0x00000010
#define ATTR_CMN_OBJID				0x00000020
#define ATTR_CMN_OBJPERMANENTID			0x00000040
#define ATTR_CMN_PAROBJID			0x00000080
#define ATTR_CMN_SCRIPT				0x00000100
#define ATTR_CMN_CRTIME				0x00000200
#define ATTR_CMN_MODTIME			0x00000400
#define ATTR_CMN_CHGTIME			0x00000800
#define ATTR_CMN_ACCTIME			0x00001000
#define ATTR_CMN_BKUPTIME			0x00002000
#define ATTR_CMN_FNDRINFO			0x00004000
#define ATTR_CMN_OWNERID			0x00008000
#define ATTR_CMN_GRPID				0x00010000
#define ATTR_CMN_ACCESSMASK			0x00020000
#define ATTR_CMN_FLAGS				0x00040000

/* The following were defined as:				*/
/*  	#define ATTR_CMN_NAMEDATTRCOUNT		0x00080000	*/
/* 	#define ATTR_CMN_NAMEDATTRLIST		0x00100000	*/
/* These bits have been salvaged for use as:			*/
/*	#define ATTR_CMN_GEN_COUNT		0x00080000	*/
/*	#define ATTR_CMN_DOCUMENT_ID		0x00100000	*/
/* They can only be used with the  FSOPT_ATTR_CMN_EXTENDED	*/
/* option flag.                                           	*/

#define ATTR_CMN_GEN_COUNT			0x00080000
#define ATTR_CMN_DOCUMENT_ID			0x00100000

#define ATTR_CMN_USERACCESS			0x00200000
#define ATTR_CMN_EXTENDED_SECURITY		0x00400000
#define ATTR_CMN_UUID				0x00800000
#define ATTR_CMN_GRPUUID			0x01000000
#define ATTR_CMN_FILEID				0x02000000
#define ATTR_CMN_PARENTID			0x04000000
#define ATTR_CMN_FULLPATH			0x08000000
#define ATTR_CMN_ADDEDTIME			0x10000000
#define ATTR_CMN_ERROR				0x20000000
#define ATTR_CMN_DATA_PROTECT_FLAGS		0x40000000

/*
 * ATTR_CMN_RETURNED_ATTRS is only valid with getattrlist(2) and
 * getattrlistbulk(2). It is always the first attribute in the return buffer.
 */
#define ATTR_CMN_RETURNED_ATTRS 		0x80000000	

#define ATTR_CMN_VALIDMASK			0xFFFFFFFF
#define ATTR_CMN_SETMASK			0x01C7FF00
#define ATTR_CMN_VOLSETMASK			0x00006700

#define ATTR_VOL_FSTYPE				0x00000001
#define ATTR_VOL_SIGNATURE			0x00000002
#define ATTR_VOL_SIZE				0x00000004
#define ATTR_VOL_SPACEFREE			0x00000008
#define ATTR_VOL_SPACEAVAIL			0x00000010
#define ATTR_VOL_MINALLOCATION			0x00000020
#define ATTR_VOL_ALLOCATIONCLUMP		0x00000040
#define ATTR_VOL_IOBLOCKSIZE			0x00000080
#define ATTR_VOL_OBJCOUNT			0x00000100
#define ATTR_VOL_FILECOUNT			0x00000200
#define ATTR_VOL_DIRCOUNT			0x00000400
#define ATTR_VOL_MAXOBJCOUNT			0x00000800
#define ATTR_VOL_MOUNTPOINT			0x00001000
#define ATTR_VOL_NAME				0x00002000
#define ATTR_VOL_MOUNTFLAGS			0x00004000
#define ATTR_VOL_MOUNTEDDEVICE			0x00008000
#define ATTR_VOL_ENCODINGSUSED			0x00010000
#define ATTR_VOL_CAPABILITIES			0x00020000
#define ATTR_VOL_UUID				0x00040000
#define ATTR_VOL_ATTRIBUTES			0x40000000
#define ATTR_VOL_INFO				0x80000000

#define ATTR_VOL_VALIDMASK			0xC007FFFF
#define ATTR_VOL_SETMASK			0x80002000


/* File/directory attributes: */
#define ATTR_DIR_LINKCOUNT			0x00000001
#define ATTR_DIR_ENTRYCOUNT			0x00000002
#define ATTR_DIR_MOUNTSTATUS			0x00000004
/* ATTR_DIR_MOUNTSTATUS Flags: */
#define	  DIR_MNTSTATUS_MNTPOINT		0x00000001
#define	  DIR_MNTSTATUS_TRIGGER			0x00000002

#define ATTR_DIR_VALIDMASK			0x00000007
#define ATTR_DIR_SETMASK			0x00000000

#define ATTR_FILE_LINKCOUNT			0x00000001
#define ATTR_FILE_TOTALSIZE			0x00000002
#define ATTR_FILE_ALLOCSIZE			0x00000004
#define ATTR_FILE_IOBLOCKSIZE			0x00000008
#define ATTR_FILE_DEVTYPE			0x00000020
#define ATTR_FILE_FORKCOUNT			0x00000080
#define ATTR_FILE_FORKLIST			0x00000100
#define ATTR_FILE_DATALENGTH			0x00000200
#define ATTR_FILE_DATAALLOCSIZE			0x00000400
#define ATTR_FILE_RSRCLENGTH			0x00001000
#define ATTR_FILE_RSRCALLOCSIZE			0x00002000

#define ATTR_FILE_VALIDMASK			0x000037FF
#define ATTR_FILE_SETMASK			0x00000020

#define ATTR_FORK_TOTALSIZE			0x00000001
#define ATTR_FORK_ALLOCSIZE			0x00000002

#define ATTR_FORK_VALIDMASK			0x00000003
#define ATTR_FORK_SETMASK			0x00000000

/* Obsolete, implemented, not supported */
#define ATTR_CMN_NAMEDATTRCOUNT			0x00080000
#define ATTR_CMN_NAMEDATTRLIST			0x00100000
#define ATTR_FILE_CLUMPSIZE			0x00000010	/* obsolete */
#define ATTR_FILE_FILETYPE			0x00000040	/* always zero */
#define ATTR_FILE_DATAEXTENTS			0x00000800	/* obsolete, HFS-specific */
#define ATTR_FILE_RSRCEXTENTS			0x00004000	/* obsolete, HFS-specific */

/* Required attributes for getattrlistbulk(2) */
#define ATTR_BULK_REQUIRED (ATTR_CMN_NAME | ATTR_CMN_RETURNED_ATTRS)

/*
 * Searchfs
 */
#define SRCHFS_START 				0x00000001
#define SRCHFS_MATCHPARTIALNAMES 		0x00000002
#define SRCHFS_MATCHDIRS 			0x00000004
#define SRCHFS_MATCHFILES 			0x00000008
#define SRCHFS_SKIPLINKS 			0x00000010
#define SRCHFS_SKIPINVISIBLE			0x00000020
#define SRCHFS_SKIPPACKAGES			0x00000040
#define SRCHFS_SKIPINAPPROPRIATE		0x00000080

#define SRCHFS_NEGATEPARAMS 			0x80000000
#define SRCHFS_VALIDOPTIONSMASK			0x800000FF

struct fssearchblock {
	struct attrlist		*returnattrs;
	void				*returnbuffer;
	size_t				returnbuffersize;
	u_long				maxmatches;
	struct timeval		timelimit;
	void				*searchparams1;
	size_t				sizeofsearchparams1;
	void				*searchparams2;
	size_t				sizeofsearchparams2;
	struct attrlist		searchattrs;
};

#ifdef KERNEL
/* LP64 version of fssearchblock.  all pointers and longs
 * grow when we're dealing with a 64-bit process.
 * WARNING - keep in sync with fssearchblock
 */

struct user64_fssearchblock {
	user64_addr_t         returnattrs;
	user64_addr_t         returnbuffer;
	user64_size_t         returnbuffersize;
	user64_ulong_t        maxmatches;
	struct user64_timeval	timelimit;
	user64_addr_t         searchparams1;
	user64_size_t         sizeofsearchparams1;
	user64_addr_t         searchparams2;
	user64_size_t         sizeofsearchparams2;
	struct attrlist		searchattrs;
};

struct user32_fssearchblock {
	user32_addr_t         returnattrs;
	user32_addr_t         returnbuffer;
	user32_size_t         returnbuffersize;
	user32_ulong_t        maxmatches;
	struct user32_timeval	timelimit;
	user32_addr_t         searchparams1;
	user32_size_t         sizeofsearchparams1;
	user32_addr_t         searchparams2;
	user32_size_t         sizeofsearchparams2;
	struct attrlist		searchattrs;
};

#endif /* KERNEL */

struct searchstate {
	uint32_t			ss_union_flags;		// for SRCHFS_START
	uint32_t			ss_union_layer;		// 0 = top
	u_char				ss_fsstate[548];	// fs private
} __attribute__((packed));

#define FST_EOF (-1)				/* end-of-file offset */

#endif /* __APPLE_API_UNSTABLE */
#endif /* !_SYS_ATTR_H_ */