[apple/xnu.git] / bsd / hfs / hfs_cnode.h

/*
 * Copyright (c) 2002-2008 Apple 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@
 */
#ifndef _HFS_CNODE_H_
#define _HFS_CNODE_H_

#include <sys/appleapiopts.h>

#ifdef KERNEL
#ifdef __APPLE_API_PRIVATE
#include <sys/types.h>
#include <sys/queue.h>
#include <sys/stat.h>
#include <sys/vnode.h>
#include <sys/quota.h>

#include <kern/locks.h>

#include <hfs/hfs_catalog.h>
#include <hfs/rangelist.h>
#if HFS_COMPRESSION
#include <sys/decmpfs.h>
#endif

/*
 * The filefork is used to represent an HFS file fork (data or resource).
 * Reading or writing any of these fields requires holding cnode lock.
 */
struct filefork {
	struct cnode   *ff_cp;               /* cnode associated with this fork */
	struct rl_head  ff_invalidranges;    /* Areas of disk that should read back as zeroes */
	union {
	   void        *ffu_sysfileinfo;     /* additional info for system files */
	   char        *ffu_symlinkptr;      /* symbolic link pathname */
	} ff_union;
	struct cat_fork ff_data;             /* fork data (size, extents) */
};
typedef struct filefork filefork_t;

/* Aliases for common fields */
#define ff_size          ff_data.cf_size
#define ff_new_size      ff_data.cf_new_size
#define ff_clumpsize     ff_data.cf_clump
#define ff_bytesread     ff_data.cf_bytesread
#define ff_blocks        ff_data.cf_blocks
#define ff_extents       ff_data.cf_extents
#define ff_unallocblocks ff_data.cf_vblocks

#define ff_symlinkptr    ff_union.ffu_symlinkptr
#define ff_sysfileinfo   ff_union.ffu_sysfileinfo


/* The btree code still needs these... */
#define fcbEOF           ff_size
#define fcbExtents       ff_extents
#define	fcbBTCBPtr       ff_sysfileinfo

typedef u_int8_t atomicflag_t;


/*
 * Hardlink Origin (for hardlinked directories).
 */
struct linkorigin {
	TAILQ_ENTRY(linkorigin)  lo_link;  /* chain */
	void *  lo_thread;      /* thread that performed the lookup */
	cnid_t  lo_cnid;        /* hardlink's cnid */
	cnid_t  lo_parentcnid;  /* hardlink's parent cnid */
};
typedef struct linkorigin linkorigin_t;

#define MAX_CACHED_ORIGINS  10
#define MAX_CACHED_FILE_ORIGINS 8

/*
 * The cnode is used to represent each active (or recently active)
 * file or directory in the HFS filesystem.
 *
 * Reading or writing any of these fields requires holding c_lock.
 */
struct cnode {
	lck_rw_t                c_rwlock;       /* cnode's lock */
	void *                  c_lockowner;    /* cnode's lock owner (exclusive case only) */
	lck_rw_t                c_truncatelock; /* protects file from truncation during read/write */
	LIST_ENTRY(cnode)	c_hash;		/* cnode's hash chain */
	u_int32_t		c_flag;		/* cnode's runtime flags */
	u_int32_t		c_hflag;	/* cnode's flags for maintaining hash - protected by global hash lock */
	struct vnode		*c_vp;		/* vnode for data fork or dir */
	struct vnode		*c_rsrc_vp;	/* vnode for resource fork */
    struct dquot		*c_dquot[MAXQUOTAS]; /* cnode's quota info */
	u_int32_t		c_childhint;	 /* catalog hint for children (small dirs only) */
	u_int32_t		c_dirthreadhint; /* catalog hint for directory's thread rec */
	struct cat_desc		c_desc;		/* cnode's descriptor */
	struct cat_attr		c_attr;		/* cnode's attributes */
	TAILQ_HEAD(hfs_originhead, linkorigin) c_originlist;  /* hardlink origin cache */
	TAILQ_HEAD(hfs_hinthead, directoryhint) c_hintlist;  /* readdir directory hint list */
  	int16_t			c_dirhinttag;	/* directory hint tag */
	union {
	    int16_t     cu_dirhintcnt;          /* directory hint count */
	    int16_t     cu_syslockcount;        /* system file use only */
	} c_union;
	u_int32_t		c_dirchangecnt; /* changes each insert/delete (in-core only) */
 	struct filefork		*c_datafork;	/* cnode's data fork */
	struct filefork		*c_rsrcfork;	/* cnode's rsrc fork */
	atomicflag_t	c_touch_acctime;
	atomicflag_t	c_touch_chgtime;
	atomicflag_t	c_touch_modtime;
#if HFS_COMPRESSION
	decmpfs_cnode  *c_decmp;
#endif /* HFS_COMPRESSION */
};
typedef struct cnode cnode_t;

/* Aliases for common cnode fields */
#define c_cnid		c_desc.cd_cnid
#define c_hint		c_desc.cd_hint
#define c_parentcnid	c_desc.cd_parentcnid
#define c_encoding	c_desc.cd_encoding

#define c_fileid	c_attr.ca_fileid
#define c_mode		c_attr.ca_mode
#define c_linkcount	c_attr.ca_linkcount
#define c_uid		c_attr.ca_uid
#define c_gid		c_attr.ca_gid
#define c_rdev		c_attr.ca_union1.cau_rdev
#define c_atime		c_attr.ca_atime
#define c_mtime		c_attr.ca_mtime
#define c_ctime		c_attr.ca_ctime
#define c_itime		c_attr.ca_itime
#define c_btime		c_attr.ca_btime
#define c_flags		c_attr.ca_flags
#define c_finderinfo	c_attr.ca_finderinfo
#define c_blocks	c_attr.ca_union2.cau_blocks
#define c_entries	c_attr.ca_union2.cau_entries
#define c_zftimeout	c_childhint

#define c_dirhintcnt    c_union.cu_dirhintcnt
#define c_syslockcount  c_union.cu_syslockcount


/* hash maintenance flags kept in c_hflag and protected by hfs_chash_mutex */
#define H_ALLOC		0x00001	/* CNode is being allocated */
#define H_ATTACH	0x00002	/* CNode is being attached to by another vnode */
#define	H_TRANSIT	0x00004	/* CNode is getting recycled  */
#define H_WAITING	0x00008	/* CNode is being waited for */


/* Runtime cnode flags (kept in c_flag) */
#define C_NEED_RVNODE_PUT  0x00001  /* Need to do a vnode_put on c_rsrc_vp after the unlock */
#define C_NEED_DVNODE_PUT  0x00002  /* Need to do a vnode_put on c_vp after the unlock */
#define C_ZFWANTSYNC	   0x00004  /* fsync requested and file has holes */
#define C_FROMSYNC         0x00008  /* fsync was called from sync */ 

#define C_MODIFIED         0x00010  /* CNode has been modified */
#define C_NOEXISTS         0x00020  /* CNode has been deleted, catalog entry is gone */
#define C_DELETED          0x00040  /* CNode has been marked to be deleted */
#define C_HARDLINK         0x00080  /* CNode is a hard link (file or dir) */

#define C_FORCEUPDATE      0x00100  /* force the catalog entry update */
#define C_HASXATTRS        0x00200  /* cnode has extended attributes */
#define C_NEG_ENTRIES      0x00400  /* directory has negative name entries */
#define C_WARNED_RSRC      0x00800  /* cnode lookup warning has been issued */ 

#define C_NEED_DATA_SETSIZE  0x01000  /* Do a ubc_setsize(0) on c_rsrc_vp after the unlock */
#define C_NEED_RSRC_SETSIZE  0x02000  /* Do a ubc_setsize(0) on c_vp after the unlock */
#define C_DIR_MODIFICATION   0x04000  /* Directory is being modified, wait for lookups */
#define C_ALWAYS_ZEROFILL    0x08000  /* Always zero-fill the file on an fsync */

#define ZFTIMELIMIT	(5 * 60)

/*
 * The following is the "invisible" bit from the fdFlags field
 * in the FndrFileInfo.
 */
enum { kFinderInvisibleMask = 1 << 14 };


/*
 * Convert between cnode pointers and vnode pointers
 */
#define VTOC(vp)	((struct cnode *)vnode_fsnode((vp)))

#define CTOV(cp,rsrc)	(((rsrc) && S_ISREG((cp)->c_mode)) ? \
			(cp)->c_rsrc_vp : (cp)->c_vp)

/*
 * Convert between vnode pointers and file forks
 *
 * Note: no CTOF since that is ambiguous
 */

#define FTOC(fp)	((fp)->ff_cp)

#define VTOF(vp)	((vp) == VTOC((vp))->c_rsrc_vp ?	\
			 VTOC((vp))->c_rsrcfork :		\
			 VTOC((vp))->c_datafork)

#define VCTOF(vp, cp)	((vp) == (cp)->c_rsrc_vp ?	\
			 (cp)->c_rsrcfork :		\
			 (cp)->c_datafork)

#define FTOV(fp)	((fp) == FTOC(fp)->c_rsrcfork ?		\
			 FTOC(fp)->c_rsrc_vp :			\
			 FTOC(fp)->c_vp)

/*
 * This is a helper function used for determining whether or not a cnode has become open
 * unlinked in between the time we acquired its vnode and the time we acquire the cnode lock
 * to start manipulating it.  Due to the SMP nature of VFS, it is probably necessary to 
 * use this macro every time we acquire a cnode lock, as the content of the Cnode may have
 * been modified in betweeen the lookup and a VNOP.  Whether or not to call this is dependent
 * upon the VNOP in question.  Sometimes it is OK to use an open-unlinked file, for example, in,
 * reading.  But other times, such as on the source of a VNOP_RENAME, it should be disallowed.
 */
int hfs_checkdeleted (struct cnode *cp);

/*
 * Test for a resource fork
 */
#define FORK_IS_RSRC(fp)	((fp) == FTOC(fp)->c_rsrcfork)

#define VNODE_IS_RSRC(vp)	((vp) == VTOC((vp))->c_rsrc_vp)

#if HFS_COMPRESSION
/*
 * VTOCMP(vp) returns a pointer to vp's decmpfs_cnode; this could be NULL
 * if the file is not compressed or if hfs_file_is_compressed() hasn't
 * yet been called on this file.
 */
#define VTOCMP(vp) (VTOC((vp))->c_decmp)
int hfs_file_is_compressed(struct cnode *cp, int skiplock);
int hfs_uncompressed_size_of_compressed_file(struct hfsmount *hfsmp, struct vnode *vp, cnid_t fid, off_t *size, int skiplock);
int hfs_hides_rsrc(vfs_context_t ctx, struct cnode *cp, int skiplock);
int hfs_hides_xattr(vfs_context_t ctx, struct cnode *cp, const char *name, int skiplock);
#endif

#define ATIME_ONDISK_ACCURACY	300


/* This overlays the FileID portion of NFS file handles. */
struct hfsfid {
	u_int32_t hfsfid_cnid;	/* Catalog node ID. */
	u_int32_t hfsfid_gen;	/* Generation number (create date). */
};


/* Get new default vnode */
extern int hfs_getnewvnode(struct hfsmount *hfsmp, struct vnode *dvp, struct componentname *cnp,
                           struct cat_desc *descp, int flags, struct cat_attr *attrp,
                           struct cat_fork *forkp, struct vnode **vpp);


#define GNV_WANTRSRC   0x01  /* Request the resource fork vnode. */
#define GNV_SKIPLOCK   0x02  /* Skip taking the cnode lock (when getting resource fork). */
#define GNV_CREATE     0x04  /* The vnode is for a newly created item. */


/* Touch cnode times based on c_touch_xxx flags */
extern void hfs_touchtimes(struct hfsmount *, struct cnode *);

/*
 * HFS cnode hash functions.
 */
extern void  hfs_chashinit(void);
extern void  hfs_chashinit_finish(struct hfsmount *hfsmp);
extern void  hfs_delete_chash(struct hfsmount *hfsmp);
extern int   hfs_chashremove(struct hfsmount *hfsmp, struct cnode *cp);
extern void  hfs_chash_abort(struct hfsmount *hfsmp, struct cnode *cp);
extern void  hfs_chash_rehash(struct hfsmount *hfsmp, struct cnode *cp1, struct cnode *cp2);
extern void  hfs_chashwakeup(struct hfsmount *hfsmp, struct cnode *cp, int flags);
extern void  hfs_chash_mark_in_transit(struct hfsmount *hfsmp, struct cnode *cp);

extern struct vnode * hfs_chash_getvnode(struct hfsmount *hfsmp, ino_t inum, int wantrsrc, int skiplock);
extern struct cnode * hfs_chash_getcnode(struct hfsmount *hfsmp, ino_t inum, struct vnode **vpp, int wantrsrc, int skiplock);
extern int hfs_chash_snoop(struct hfsmount *, ino_t, int (*)(const struct cat_desc *,
                            const struct cat_attr *, void *), void *);
extern int hfs_valid_cnode(struct hfsmount *hfsmp, struct vnode *dvp, struct componentname *cnp, cnid_t cnid);
				
extern int hfs_chash_set_childlinkbit(struct hfsmount *hfsmp, cnid_t cnid);

/*
 * HFS cnode lock functions.
 *
 *  HFS Locking Order:
 *
 *  1. cnode truncate lock (if needed)
 *  2. cnode lock (in parent-child order if related, otherwise by address order)
 *  3. journal (if needed)
 *  4. system files (as needed)
 *       A. Catalog B-tree file
 *       B. Attributes B-tree file
 *       C. Startup file (if there is one)
 *       D. Allocation Bitmap file (always exclusive, supports recursion)
 *       E. Overflow Extents B-tree file (always exclusive, supports recursion)
 *  5. hfs mount point (always last)
 *
 */
enum hfslocktype  {HFS_SHARED_LOCK = 1, HFS_EXCLUSIVE_LOCK = 2, HFS_FORCE_LOCK = 3};
#define HFS_SHARED_OWNER  (void *)0xffffffff

extern int hfs_lock(struct cnode *, enum hfslocktype);
extern int hfs_lockpair(struct cnode *, struct cnode *, enum hfslocktype);
extern int hfs_lockfour(struct cnode *, struct cnode *, struct cnode *, struct cnode *,
                        enum hfslocktype, struct cnode **);

extern void hfs_unlock(struct cnode *);
extern void hfs_unlockpair(struct cnode *, struct cnode *);
extern void hfs_unlockfour(struct cnode *, struct cnode *, struct cnode *, struct cnode *);

extern void hfs_lock_truncate(struct cnode *, int);
extern void hfs_unlock_truncate(struct cnode *, int);

#endif /* __APPLE_API_PRIVATE */
#endif /* KERNEL */

#endif /* ! _HFS_CNODE_H_ */
Commit	Line	Data
9bccf70c	1	/*
b0d623f7	2	* Copyright (c) 2002-2008 Apple Inc. All rights reserved.
9bccf70c	3	*
2d21ac55	4	* @APPLE_OSREFERENCE_LICENSE_HEADER_START@
9bccf70c	5	*
2d21ac55 A	6	* This file contains Original Code and/or Modifications of Original Code
	7	* as defined in and that are subject to the Apple Public Source License
	8	* Version 2.0 (the 'License'). You may not use this file except in
	9	* compliance with the License. The rights granted to you under the License
	10	* may not be used to create, or enable the creation or redistribution of,
	11	* unlawful or unlicensed copies of an Apple operating system, or to
	12	* circumvent, violate, or enable the circumvention or violation of, any
	13	* terms of an Apple operating system software license agreement.
8f6c56a5	14	*
2d21ac55 A	15	* Please obtain a copy of the License at
	16	* http://www.opensource.apple.com/apsl/ and read it before using this file.
	17	*
	18	* The Original Code and all software distributed under the License are
	19	* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
8f6c56a5 A	20	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
8f6c56a5 A	21	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
2d21ac55 A	22	* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
	23	* Please see the License for the specific language governing rights and
	24	* limitations under the License.
8f6c56a5	25	*
2d21ac55	26	* @APPLE_OSREFERENCE_LICENSE_HEADER_END@
9bccf70c A	27	*/
	28	#ifndef _HFS_CNODE_H_
	29	#define _HFS_CNODE_H_
	30
	31	#include <sys/appleapiopts.h>
	32
	33	#ifdef KERNEL
	34	#ifdef __APPLE_API_PRIVATE
	35	#include <sys/types.h>
9bccf70c A	36	#include <sys/queue.h>
	37	#include <sys/stat.h>
	38	#include <sys/vnode.h>
	39	#include <sys/quota.h>
	40
91447636 A	41	#include <kern/locks.h>
91447636 A	42
9bccf70c A	43	#include <hfs/hfs_catalog.h>
9bccf70c A	44	#include <hfs/rangelist.h>
b0d623f7 A	45	#if HFS_COMPRESSION
	46	#include <sys/decmpfs.h>
	47	#endif
9bccf70c A	48
	49	/*
	50	* The filefork is used to represent an HFS file fork (data or resource).
	51	* Reading or writing any of these fields requires holding cnode lock.
	52	*/
	53	struct filefork {
91447636 A	54	struct cnode ff_cp; / cnode associated with this fork */
91447636 A	55	struct rl_head ff_invalidranges; /* Areas of disk that should read back as zeroes */
9bccf70c	56	union {
91447636 A	57	void ffu_sysfileinfo; / additional info for system files */
	58	char ffu_symlinkptr; / symbolic link pathname */
	59	} ff_union;
	60	struct cat_fork ff_data; /* fork data (size, extents) */
9bccf70c	61	};
55e303ae	62	typedef struct filefork filefork_t;
9bccf70c A	63
9bccf70c A	64	/* Aliases for common fields */
91447636	65	#define ff_size ff_data.cf_size
593a1d5f	66	#define ff_new_size ff_data.cf_new_size
91447636 A	67	#define ff_clumpsize ff_data.cf_clump
	68	#define ff_bytesread ff_data.cf_bytesread
	69	#define ff_blocks ff_data.cf_blocks
	70	#define ff_extents ff_data.cf_extents
55e303ae A	71	#define ff_unallocblocks ff_data.cf_vblocks
55e303ae A	72
91447636 A	73	#define ff_symlinkptr ff_union.ffu_symlinkptr
91447636 A	74	#define ff_sysfileinfo ff_union.ffu_sysfileinfo
9bccf70c A	75
	76
	77	/* The btree code still needs these... */
91447636 A	78	#define fcbEOF ff_size
	79	#define fcbExtents ff_extents
	80	#define fcbBTCBPtr ff_sysfileinfo
9bccf70c	81
91447636	82	typedef u_int8_t atomicflag_t;
2d21ac55 A	83
	84
	85	/*
	86	* Hardlink Origin (for hardlinked directories).
	87	*/
	88	struct linkorigin {
	89	TAILQ_ENTRY(linkorigin) lo_link; /* chain */
	90	void * lo_thread; /* thread that performed the lookup */
	91	cnid_t lo_cnid; /* hardlink's cnid */
	92	cnid_t lo_parentcnid; /* hardlink's parent cnid */
	93	};
	94	typedef struct linkorigin linkorigin_t;
	95
	96	#define MAX_CACHED_ORIGINS 10
935ed37a	97	#define MAX_CACHED_FILE_ORIGINS 8
2d21ac55	98
9bccf70c A	99	/*
	100	* The cnode is used to represent each active (or recently active)
	101	* file or directory in the HFS filesystem.
	102	*
	103	* Reading or writing any of these fields requires holding c_lock.
	104	*/
	105	struct cnode {
91447636 A	106	lck_rw_t c_rwlock; /* cnode's lock */
	107	void * c_lockowner; /* cnode's lock owner (exclusive case only) */
	108	lck_rw_t c_truncatelock; /* protects file from truncation during read/write */
9bccf70c A	109	LIST_ENTRY(cnode) c_hash; /* cnode's hash chain */
9bccf70c A	110	u_int32_t c_flag; /* cnode's runtime flags */
91447636	111	u_int32_t c_hflag; /* cnode's flags for maintaining hash - protected by global hash lock */
9bccf70c A	112	struct vnode c_vp; / vnode for data fork or dir */
9bccf70c A	113	struct vnode c_rsrc_vp; / vnode for resource fork */
b0d623f7	114	struct dquot c_dquot[MAXQUOTAS]; / cnode's quota info */
2d21ac55 A	115	u_int32_t c_childhint; /* catalog hint for children (small dirs only) */
2d21ac55 A	116	u_int32_t c_dirthreadhint; /* catalog hint for directory's thread rec */
9bccf70c A	117	struct cat_desc c_desc; /* cnode's descriptor */
9bccf70c A	118	struct cat_attr c_attr; /* cnode's attributes */
2d21ac55 A	119	TAILQ_HEAD(hfs_originhead, linkorigin) c_originlist; /* hardlink origin cache */
2d21ac55 A	120	TAILQ_HEAD(hfs_hinthead, directoryhint) c_hintlist; /* readdir directory hint list */
91447636 A	121	int16_t c_dirhinttag; /* directory hint tag */
	122	union {
	123	int16_t cu_dirhintcnt; /* directory hint count */
	124	int16_t cu_syslockcount; /* system file use only */
	125	} c_union;
2d21ac55	126	u_int32_t c_dirchangecnt; /* changes each insert/delete (in-core only) */
9bccf70c A	127	struct filefork c_datafork; / cnode's data fork */
9bccf70c A	128	struct filefork c_rsrcfork; / cnode's rsrc fork */
91447636 A	129	atomicflag_t c_touch_acctime;
	130	atomicflag_t c_touch_chgtime;
	131	atomicflag_t c_touch_modtime;
b0d623f7 A	132	#if HFS_COMPRESSION
	133	decmpfs_cnode *c_decmp;
	134	#endif /* HFS_COMPRESSION */
9bccf70c	135	};
55e303ae	136	typedef struct cnode cnode_t;
9bccf70c A	137
	138	/* Aliases for common cnode fields */
	139	#define c_cnid c_desc.cd_cnid
	140	#define c_hint c_desc.cd_hint
	141	#define c_parentcnid c_desc.cd_parentcnid
	142	#define c_encoding c_desc.cd_encoding
	143
	144	#define c_fileid c_attr.ca_fileid
	145	#define c_mode c_attr.ca_mode
2d21ac55	146	#define c_linkcount c_attr.ca_linkcount
9bccf70c A	147	#define c_uid c_attr.ca_uid
9bccf70c A	148	#define c_gid c_attr.ca_gid
2d21ac55	149	#define c_rdev c_attr.ca_union1.cau_rdev
9bccf70c A	150	#define c_atime c_attr.ca_atime
9bccf70c A	151	#define c_mtime c_attr.ca_mtime
9bccf70c A	152	#define c_ctime c_attr.ca_ctime
	153	#define c_itime c_attr.ca_itime
	154	#define c_btime c_attr.ca_btime
	155	#define c_flags c_attr.ca_flags
	156	#define c_finderinfo c_attr.ca_finderinfo
2d21ac55 A	157	#define c_blocks c_attr.ca_union2.cau_blocks
2d21ac55 A	158	#define c_entries c_attr.ca_union2.cau_entries
9bccf70c A	159	#define c_zftimeout c_childhint
9bccf70c A	160
91447636 A	161	#define c_dirhintcnt c_union.cu_dirhintcnt
91447636 A	162	#define c_syslockcount c_union.cu_syslockcount
9bccf70c	163
55e303ae	164
91447636 A	165	/* hash maintenance flags kept in c_hflag and protected by hfs_chash_mutex */
	166	#define H_ALLOC 0x00001 /* CNode is being allocated */
	167	#define H_ATTACH 0x00002 /* CNode is being attached to by another vnode */
	168	#define H_TRANSIT 0x00004 /* CNode is getting recycled */
	169	#define H_WAITING 0x00008 /* CNode is being waited for */
	170
9bccf70c	171
91447636 A	172	/* Runtime cnode flags (kept in c_flag) */
	173	#define C_NEED_RVNODE_PUT 0x00001 /* Need to do a vnode_put on c_rsrc_vp after the unlock */
	174	#define C_NEED_DVNODE_PUT 0x00002 /* Need to do a vnode_put on c_vp after the unlock */
	175	#define C_ZFWANTSYNC 0x00004 /* fsync requested and file has holes */
	176	#define C_FROMSYNC 0x00008 /* fsync was called from sync */
9bccf70c	177
91447636 A	178	#define C_MODIFIED 0x00010 /* CNode has been modified */
	179	#define C_NOEXISTS 0x00020 /* CNode has been deleted, catalog entry is gone */
	180	#define C_DELETED 0x00040 /* CNode has been marked to be deleted */
2d21ac55	181	#define C_HARDLINK 0x00080 /* CNode is a hard link (file or dir) */
9bccf70c	182
91447636 A	183	#define C_FORCEUPDATE 0x00100 /* force the catalog entry update */
91447636 A	184	#define C_HASXATTRS 0x00200 /* cnode has extended attributes */
2d21ac55 A	185	#define C_NEG_ENTRIES 0x00400 /* directory has negative name entries */
2d21ac55 A	186	#define C_WARNED_RSRC 0x00800 /* cnode lookup warning has been issued */
9bccf70c	187
0c530ab8 A	188	#define C_NEED_DATA_SETSIZE 0x01000 /* Do a ubc_setsize(0) on c_rsrc_vp after the unlock */
0c530ab8 A	189	#define C_NEED_RSRC_SETSIZE 0x02000 /* Do a ubc_setsize(0) on c_vp after the unlock */
2d21ac55	190	#define C_DIR_MODIFICATION 0x04000 /* Directory is being modified, wait for lookups */
b0d623f7	191	#define C_ALWAYS_ZEROFILL 0x08000 /* Always zero-fill the file on an fsync */
9bccf70c A	192
	193	#define ZFTIMELIMIT (5 * 60)
	194
2d21ac55 A	195	/*
	196	* The following is the "invisible" bit from the fdFlags field
	197	* in the FndrFileInfo.
	198	*/
	199	enum { kFinderInvisibleMask = 1 << 14 };
	200
	201
9bccf70c A	202	/*
	203	* Convert between cnode pointers and vnode pointers
	204	*/
91447636	205	#define VTOC(vp) ((struct cnode *)vnode_fsnode((vp)))
9bccf70c A	206
	207	#define CTOV(cp,rsrc) (((rsrc) && S_ISREG((cp)->c_mode)) ? \
	208	(cp)->c_rsrc_vp : (cp)->c_vp)
	209
	210	/*
	211	* Convert between vnode pointers and file forks
	212	*
	213	* Note: no CTOF since that is ambiguous
	214	*/
	215
	216	#define FTOC(fp) ((fp)->ff_cp)
	217
	218	#define VTOF(vp) ((vp) == VTOC((vp))->c_rsrc_vp ? \
	219	VTOC((vp))->c_rsrcfork : \
	220	VTOC((vp))->c_datafork)
	221
2d21ac55 A	222	#define VCTOF(vp, cp) ((vp) == (cp)->c_rsrc_vp ? \
	223	(cp)->c_rsrcfork : \
	224	(cp)->c_datafork)
	225
9bccf70c A	226	#define FTOV(fp) ((fp) == FTOC(fp)->c_rsrcfork ? \
	227	FTOC(fp)->c_rsrc_vp : \
	228	FTOC(fp)->c_vp)
	229
b7266188 A	230	/*
	231	* This is a helper function used for determining whether or not a cnode has become open
	232	* unlinked in between the time we acquired its vnode and the time we acquire the cnode lock
	233	* to start manipulating it. Due to the SMP nature of VFS, it is probably necessary to
	234	* use this macro every time we acquire a cnode lock, as the content of the Cnode may have
	235	* been modified in betweeen the lookup and a VNOP. Whether or not to call this is dependent
	236	* upon the VNOP in question. Sometimes it is OK to use an open-unlinked file, for example, in,
	237	* reading. But other times, such as on the source of a VNOP_RENAME, it should be disallowed.
	238	*/
	239	int hfs_checkdeleted (struct cnode *cp);
55e303ae	240
9bccf70c A	241	/*
	242	* Test for a resource fork
	243	*/
	244	#define FORK_IS_RSRC(fp) ((fp) == FTOC(fp)->c_rsrcfork)
	245
	246	#define VNODE_IS_RSRC(vp) ((vp) == VTOC((vp))->c_rsrc_vp)
	247
b0d623f7 A	248	#if HFS_COMPRESSION
	249	/*
	250	* VTOCMP(vp) returns a pointer to vp's decmpfs_cnode; this could be NULL
	251	* if the file is not compressed or if hfs_file_is_compressed() hasn't
	252	* yet been called on this file.
	253	*/
	254	#define VTOCMP(vp) (VTOC((vp))->c_decmp)
	255	int hfs_file_is_compressed(struct cnode *cp, int skiplock);
	256	int hfs_uncompressed_size_of_compressed_file(struct hfsmount hfsmp, struct vnode vp, cnid_t fid, off_t *size, int skiplock);
	257	int hfs_hides_rsrc(vfs_context_t ctx, struct cnode *cp, int skiplock);
	258	int hfs_hides_xattr(vfs_context_t ctx, struct cnode cp, const char name, int skiplock);
	259	#endif
9bccf70c	260
55e303ae	261	#define ATIME_ONDISK_ACCURACY 300
9bccf70c	262
91447636 A	263
91447636 A	264	/* This overlays the FileID portion of NFS file handles. */
9bccf70c	265	struct hfsfid {
9bccf70c A	266	u_int32_t hfsfid_cnid; /* Catalog node ID. */
	267	u_int32_t hfsfid_gen; /* Generation number (create date). */
	268	};
	269
	270
2d21ac55 A	271	/* Get new default vnode */
	272	extern int hfs_getnewvnode(struct hfsmount hfsmp, struct vnode dvp, struct componentname *cnp,
	273	struct cat_desc descp, int flags, struct cat_attr attrp,
	274	struct cat_fork forkp, struct vnode *vpp);
	275
	276
	277	#define GNV_WANTRSRC 0x01 /* Request the resource fork vnode. */
	278	#define GNV_SKIPLOCK 0x02 /* Skip taking the cnode lock (when getting resource fork). */
	279	#define GNV_CREATE 0x04 /* The vnode is for a newly created item. */
	280
	281
	282	/* Touch cnode times based on c_touch_xxx flags */
91447636 A	283	extern void hfs_touchtimes(struct hfsmount , struct cnode );
91447636 A	284
9bccf70c A	285	/*
	286	* HFS cnode hash functions.
	287	*/
	288	extern void hfs_chashinit(void);
b0d623f7 A	289	extern void hfs_chashinit_finish(struct hfsmount *hfsmp);
	290	extern void hfs_delete_chash(struct hfsmount *hfsmp);
	291	extern int hfs_chashremove(struct hfsmount hfsmp, struct cnode cp);
	292	extern void hfs_chash_abort(struct hfsmount hfsmp, struct cnode cp);
	293	extern void hfs_chash_rehash(struct hfsmount hfsmp, struct cnode cp1, struct cnode *cp2);
	294	extern void hfs_chashwakeup(struct hfsmount hfsmp, struct cnode cp, int flags);
	295	extern void hfs_chash_mark_in_transit(struct hfsmount hfsmp, struct cnode cp);
	296
	297	extern struct vnode * hfs_chash_getvnode(struct hfsmount *hfsmp, ino_t inum, int wantrsrc, int skiplock);
	298	extern struct cnode * hfs_chash_getcnode(struct hfsmount hfsmp, ino_t inum, struct vnode *vpp, int wantrsrc, int skiplock);
	299	extern int hfs_chash_snoop(struct hfsmount , ino_t, int ()(const struct cat_desc *,
91447636	300	const struct cat_attr , void ), void *);
2d21ac55	301	extern int hfs_valid_cnode(struct hfsmount hfsmp, struct vnode dvp, struct componentname *cnp, cnid_t cnid);
91447636	302
b0d623f7	303	extern int hfs_chash_set_childlinkbit(struct hfsmount *hfsmp, cnid_t cnid);
91447636 A	304
	305	/*
	306	* HFS cnode lock functions.
	307	*
	308	* HFS Locking Order:
	309	*
	310	* 1. cnode truncate lock (if needed)
	311	* 2. cnode lock (in parent-child order if related, otherwise by address order)
	312	* 3. journal (if needed)
	313	* 4. system files (as needed)
	314	* A. Catalog B-tree file
	315	* B. Attributes B-tree file
2d21ac55 A	316	* C. Startup file (if there is one)
	317	* D. Allocation Bitmap file (always exclusive, supports recursion)
	318	* E. Overflow Extents B-tree file (always exclusive, supports recursion)
91447636 A	319	* 5. hfs mount point (always last)
	320	*
	321	*/
	322	enum hfslocktype {HFS_SHARED_LOCK = 1, HFS_EXCLUSIVE_LOCK = 2, HFS_FORCE_LOCK = 3};
	323	#define HFS_SHARED_OWNER (void *)0xffffffff
	324
	325	extern int hfs_lock(struct cnode *, enum hfslocktype);
	326	extern int hfs_lockpair(struct cnode , struct cnode , enum hfslocktype);
	327	extern int hfs_lockfour(struct cnode , struct cnode , struct cnode , struct cnode ,
b0d623f7	328	enum hfslocktype, struct cnode **);
91447636 A	329
	330	extern void hfs_unlock(struct cnode *);
	331	extern void hfs_unlockpair(struct cnode , struct cnode );
	332	extern void hfs_unlockfour(struct cnode , struct cnode , struct cnode , struct cnode );
	333
	334	extern void hfs_lock_truncate(struct cnode *, int);
2d21ac55	335	extern void hfs_unlock_truncate(struct cnode *, int);
9bccf70c A	336
	337	#endif /* __APPLE_API_PRIVATE */
	338	#endif /* KERNEL */
	339
	340	#endif /* ! _HFS_CNODE_H_ */