[apple/xnu.git] / bsd / hfs / hfs_link.c

/*
 * Copyright (c) 1999-2002 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 * 
 * Copyright (c) 1999-2003 Apple Computer, Inc.  All Rights Reserved.
 * 
 * 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. 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_LICENSE_HEADER_END@
 */


#include <sys/systm.h>
#include <sys/kernel.h>
#include <sys/malloc.h>
#include <sys/mount.h>
#include <sys/namei.h>
#include <sys/stat.h>
#include <sys/vnode.h>
#include <vfs/vfs_support.h>
#include <libkern/libkern.h>

#include "hfs.h"
#include "hfs_catalog.h"
#include "hfs_format.h"
#include "hfs_endian.h"


/*
 * Create a new indirect link
 *
 * An indirect link is a reference to a data node.  The only useable
 * fields in the link are the link number, parentID, name and text
 * encoding.  All other catalog fields are ignored.
 */
static int
createindirectlink(struct hfsmount *hfsmp, u_int32_t linknum,
			u_int32_t linkparid, char *linkName, cnid_t *linkcnid)
{
	struct FndrFileInfo *fip;
	struct cat_desc desc;
	struct cat_attr attr;
	int result;

	/* Setup the descriptor */
	bzero(&desc, sizeof(desc));
	desc.cd_nameptr = linkName;
	desc.cd_namelen = strlen(linkName);
	desc.cd_parentcnid = linkparid;

	/* Setup the default attributes */
	bzero(&attr, sizeof(attr));
	
	/* links are matched to data nodes by link ID and to volumes by create date */
	attr.ca_rdev = linknum;  /* note: cat backend overloads ca_rdev to be the linknum when nlink = 0 */
	attr.ca_itime = HFSTOVCB(hfsmp)->vcbCrDate;
	attr.ca_mode = S_IFREG;

	fip = (struct FndrFileInfo *)&attr.ca_finderinfo;
	fip->fdType    = SWAP_BE32 (kHardLinkFileType);	/* 'hlnk' */
	fip->fdCreator = SWAP_BE32 (kHFSPlusCreator);	/* 'hfs+' */
	fip->fdFlags   = SWAP_BE16 (kHasBeenInited);

	hfs_global_shared_lock_acquire(hfsmp);
	if (hfsmp->jnl) {
	    if (journal_start_transaction(hfsmp->jnl) != 0) {
			hfs_global_shared_lock_release(hfsmp);
			return EINVAL;
	    }
	}

	/* Create the indirect link directly in the catalog */
	result = cat_create(hfsmp, &desc, &attr, NULL);

	if (result == 0 && linkcnid != NULL)
		*linkcnid = attr.ca_fileid;

	if (hfsmp->jnl) {
	    journal_end_transaction(hfsmp->jnl);
	}
	hfs_global_shared_lock_release(hfsmp);

	return (result);
}


/*
 * 2 locks are needed (dvp and vp)
 * also need catalog lock
 *
 * caller's responsibility:
 *		componentname cleanup
 *		unlocking dvp and vp
 */
static int
hfs_makelink(struct hfsmount *hfsmp, struct cnode *cp, struct cnode *dcp,
		struct componentname *cnp)
{
	struct proc *p = cnp->cn_proc;
	u_int32_t indnodeno = 0;
	char inodename[32];
	struct cat_desc to_desc;
	int newlink = 0;
	int retval;


	/* We don't allow link nodes in our Private Meta Data folder! */
	if (dcp->c_fileid == hfsmp->hfs_privdir_desc.cd_cnid)
		return (EPERM);

	if (hfs_freeblks(hfsmp, 0) == 0)
		return (ENOSPC);

	/* Lock catalog b-tree */
	retval = hfs_metafilelocking(hfsmp, kHFSCatalogFileID, LK_EXCLUSIVE, p);
	if (retval) {
	    return retval;
	}

	/*
	 * If this is a new hardlink then we need to create the data
	 * node (inode) and replace the original file with a link node.
	 */
	if (cp->c_nlink == 2 && (cp->c_flag & C_HARDLINK) == 0) {
		newlink = 1;
		bzero(&to_desc, sizeof(to_desc));
		to_desc.cd_parentcnid = hfsmp->hfs_privdir_desc.cd_cnid;
		to_desc.cd_cnid = cp->c_fileid;

		do {
			/* get a unique indirect node number */
			indnodeno = ((random() & 0x3fffffff) + 100);
			MAKE_INODE_NAME(inodename, indnodeno);

			/* move source file to data node directory */
			to_desc.cd_nameptr = inodename;
			to_desc.cd_namelen = strlen(inodename);
		
			retval = cat_rename(hfsmp, &cp->c_desc, &hfsmp->hfs_privdir_desc,
					&to_desc, NULL);

		} while (retval == EEXIST);
		if (retval)
			goto out;

		/* Replace source file with link node */
		retval = createindirectlink(hfsmp, indnodeno, cp->c_parentcnid,
				cp->c_desc.cd_nameptr, &cp->c_desc.cd_cnid);
		if (retval) {
			/* put it source file back */
		// XXXdbg
		#if 1
		    {
		    	int err;
				err = cat_rename(hfsmp, &to_desc, &dcp->c_desc, &cp->c_desc, NULL);
				if (err)
					panic("hfs_makelink: error %d from cat_rename backout 1", err);
		    }
		#else
			(void) cat_rename(hfsmp, &to_desc, &dcp->c_desc, &cp->c_desc, NULL);
		#endif
			goto out;
		}
		cp->c_rdev = indnodeno;
	} else {
		indnodeno = cp->c_rdev;
	}

	/*
	 * Create a catalog entry for the new link (parentID + name).
	 */
	retval = createindirectlink(hfsmp, indnodeno, dcp->c_fileid, cnp->cn_nameptr, NULL);
	if (retval && newlink) {
		/* Get rid of new link */
		(void) cat_delete(hfsmp, &cp->c_desc, &cp->c_attr);

		/* Put the source file back */
	// XXXdbg
	#if 1
		{
			int err;
			err = cat_rename(hfsmp, &to_desc, &dcp->c_desc, &cp->c_desc, NULL);
			if (err)
				panic("hfs_makelink: error %d from cat_rename backout 2", err);
		}
	#else
		(void) cat_rename(hfsmp, &to_desc, &dcp->c_desc, &cp->c_desc, NULL);
	#endif
		goto out;
	}

	/*
	 * Finally, if this is a new hardlink then:
	 *  - update HFS Private Data dir
	 *  - mark the cnode as a hard link
	 */
	if (newlink) {
		hfsmp->hfs_privdir_attr.ca_entries++;
		(void)cat_update(hfsmp, &hfsmp->hfs_privdir_desc,
			&hfsmp->hfs_privdir_attr, NULL, NULL);
		hfs_volupdate(hfsmp, VOL_MKFILE, 0);
		cp->c_flag |= (C_CHANGE | C_HARDLINK);
	}

out:
	/* Unlock catalog b-tree */
	(void) hfs_metafilelocking(hfsmp, kHFSCatalogFileID, LK_RELEASE, p);

	return (retval);
}


/*
 * link vnode call
#% link		vp	U U U
#% link		tdvp	L U U
#
 vop_link {
     IN WILLRELE struct vnode *vp;
     IN struct vnode *targetPar_vp;
     IN struct componentname *cnp;

     */
int
hfs_link(ap)
	struct vop_link_args /* {
		struct vnode *a_vp;
		struct vnode *a_tdvp;
		struct componentname *a_cnp;
	} */ *ap;
{
	struct hfsmount *hfsmp;
	struct vnode *vp = ap->a_vp;
	struct vnode *tdvp = ap->a_tdvp;
	struct componentname *cnp = ap->a_cnp;
	struct proc *p = cnp->cn_proc;
	struct cnode *cp;
	struct cnode *tdcp;
	struct timeval tv;
	int error;

	hfsmp = VTOHFS(vp);
	
#if HFS_DIAGNOSTIC
	if ((cnp->cn_flags & HASBUF) == 0)
		panic("hfs_link: no name");
#endif
	if (tdvp->v_mount != vp->v_mount) {
		VOP_ABORTOP(tdvp, cnp);
		error = EXDEV;
		goto out2;
	}
	if (VTOVCB(tdvp)->vcbSigWord != kHFSPlusSigWord)
		return err_link(ap);	/* hfs disks don't support hard links */
	
	if (hfsmp->hfs_private_metadata_dir == 0)
		return err_link(ap);	/* no private metadata dir, no links possible */

	if (tdvp != vp && (error = vn_lock(vp, LK_EXCLUSIVE, p))) {
		VOP_ABORTOP(tdvp, cnp);
		goto out2;
	}
	cp = VTOC(vp);
	tdcp = VTOC(tdvp);

	if (cp->c_nlink >= HFS_LINK_MAX) {
		VOP_ABORTOP(tdvp, cnp);
		error = EMLINK;
		goto out1;
	}
	if (cp->c_flags & (IMMUTABLE | APPEND)) {
		VOP_ABORTOP(tdvp, cnp);
		error = EPERM;
		goto out1;
	}
	if (vp->v_type == VBLK || vp->v_type == VCHR) {
		VOP_ABORTOP(tdvp, cnp);
		error = EINVAL;  /* cannot link to a special file */
		goto out1;
	}

	hfs_global_shared_lock_acquire(hfsmp);
	if (hfsmp->jnl) {
	    if (journal_start_transaction(hfsmp->jnl) != 0) {
			hfs_global_shared_lock_release(hfsmp);
			VOP_ABORTOP(tdvp, cnp);
			error = EINVAL;  /* cannot link to a special file */
			goto out1;
	    }
	}

	cp->c_nlink++;
	cp->c_flag |= C_CHANGE;
	tv = time;

	error = VOP_UPDATE(vp, &tv, &tv, 1);
	if (!error) {
		error = hfs_makelink(hfsmp, cp, tdcp, cnp);
	}
	if (error) {
		cp->c_nlink--;
		cp->c_flag |= C_CHANGE;
	} else {
		/* Update the target directory and volume stats */
		tdcp->c_nlink++;
		tdcp->c_entries++;
		tdcp->c_flag |= C_CHANGE | C_UPDATE;
		tv = time;
		(void) VOP_UPDATE(tdvp, &tv, &tv, 0);

		hfs_volupdate(hfsmp, VOL_MKFILE,
			(tdcp->c_cnid == kHFSRootFolderID));
	}

	// XXXdbg - need to do this here as well because cp could have changed
	error = VOP_UPDATE(vp, &tv, &tv, 1);

	FREE_ZONE(cnp->cn_pnbuf, cnp->cn_pnlen, M_NAMEI);

	if (hfsmp->jnl) {
	    journal_end_transaction(hfsmp->jnl);
	}
	hfs_global_shared_lock_release(hfsmp);

out1:
	if (tdvp != vp)
		VOP_UNLOCK(vp, 0, p);
out2:
	vput(tdvp);
	return (error);
}
Commit	Line	Data
1c79356b	1	/*
9bccf70c	2	* Copyright (c) 1999-2002 Apple Computer, Inc. All rights reserved.
1c79356b A	3	*
	4	* @APPLE_LICENSE_HEADER_START@
	5	*
43866e37	6	* Copyright (c) 1999-2003 Apple Computer, Inc. All Rights Reserved.
1c79356b	7	*
43866e37 A	8	* This file contains Original Code and/or Modifications of Original Code
	9	* as defined in and that are subject to the Apple Public Source License
	10	* Version 2.0 (the 'License'). You may not use this file except in
	11	* compliance with the License. Please obtain a copy of the License at
	12	* http://www.opensource.apple.com/apsl/ and read it before using this
	13	* file.
	14	*
	15	* The Original Code and all software distributed under the License are
	16	* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
1c79356b A	17	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
1c79356b A	18	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
43866e37 A	19	* FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
	20	* Please see the License for the specific language governing rights and
	21	* limitations under the License.
1c79356b A	22	*
	23	* @APPLE_LICENSE_HEADER_END@
	24	*/
	25
1c79356b A	26
	27	#include <sys/systm.h>
	28	#include <sys/kernel.h>
	29	#include <sys/malloc.h>
9bccf70c	30	#include <sys/mount.h>
1c79356b A	31	#include <sys/namei.h>
	32	#include <sys/stat.h>
	33	#include <sys/vnode.h>
	34	#include <vfs/vfs_support.h>
	35	#include <libkern/libkern.h>
	36
	37	#include "hfs.h"
9bccf70c A	38	#include "hfs_catalog.h"
	39	#include "hfs_format.h"
	40	#include "hfs_endian.h"
1c79356b A	41
	42
	43	/*
	44	* Create a new indirect link
	45	*
9bccf70c A	46	* An indirect link is a reference to a data node. The only useable
	47	* fields in the link are the link number, parentID, name and text
	48	* encoding. All other catalog fields are ignored.
1c79356b A	49	*/
1c79356b A	50	static int
9bccf70c A	51	createindirectlink(struct hfsmount *hfsmp, u_int32_t linknum,
9bccf70c A	52	u_int32_t linkparid, char linkName, cnid_t linkcnid)
1c79356b	53	{
9bccf70c A	54	struct FndrFileInfo *fip;
	55	struct cat_desc desc;
	56	struct cat_attr attr;
1c79356b A	57	int result;
1c79356b A	58
9bccf70c A	59	/* Setup the descriptor */
	60	bzero(&desc, sizeof(desc));
	61	desc.cd_nameptr = linkName;
	62	desc.cd_namelen = strlen(linkName);
	63	desc.cd_parentcnid = linkparid;
1c79356b	64
9bccf70c A	65	/* Setup the default attributes */
	66	bzero(&attr, sizeof(attr));
	67
	68	/* links are matched to data nodes by link ID and to volumes by create date */
	69	attr.ca_rdev = linknum; /* note: cat backend overloads ca_rdev to be the linknum when nlink = 0 */
	70	attr.ca_itime = HFSTOVCB(hfsmp)->vcbCrDate;
	71	attr.ca_mode = S_IFREG;
1c79356b	72
9bccf70c A	73	fip = (struct FndrFileInfo *)&attr.ca_finderinfo;
	74	fip->fdType = SWAP_BE32 (kHardLinkFileType); /* 'hlnk' */
	75	fip->fdCreator = SWAP_BE32 (kHFSPlusCreator); /* 'hfs+' */
	76	fip->fdFlags = SWAP_BE16 (kHasBeenInited);
1c79356b	77
b4c24cb9 A	78	hfs_global_shared_lock_acquire(hfsmp);
	79	if (hfsmp->jnl) {
	80	if (journal_start_transaction(hfsmp->jnl) != 0) {
	81	hfs_global_shared_lock_release(hfsmp);
	82	return EINVAL;
	83	}
	84	}
	85
9bccf70c A	86	/* Create the indirect link directly in the catalog */
9bccf70c A	87	result = cat_create(hfsmp, &desc, &attr, NULL);
1c79356b	88
b4c24cb9	89	if (result == 0 && linkcnid != NULL)
9bccf70c	90	*linkcnid = attr.ca_fileid;
1c79356b	91
b4c24cb9 A	92	if (hfsmp->jnl) {
	93	journal_end_transaction(hfsmp->jnl);
	94	}
	95	hfs_global_shared_lock_release(hfsmp);
	96
1c79356b A	97	return (result);
	98	}
	99
	100
	101	/*
9bccf70c	102	* 2 locks are needed (dvp and vp)
1c79356b A	103	* also need catalog lock
	104	*
	105	* caller's responsibility:
	106	* componentname cleanup
9bccf70c	107	* unlocking dvp and vp
1c79356b A	108	*/
1c79356b A	109	static int
9bccf70c A	110	hfs_makelink(struct hfsmount hfsmp, struct cnode cp, struct cnode *dcp,
9bccf70c A	111	struct componentname *cnp)
1c79356b A	112	{
1c79356b A	113	struct proc *p = cnp->cn_proc;
1c79356b A	114	u_int32_t indnodeno = 0;
1c79356b A	115	char inodename[32];
9bccf70c A	116	struct cat_desc to_desc;
9bccf70c A	117	int newlink = 0;
1c79356b A	118	int retval;
1c79356b A	119
1c79356b A	120
1c79356b A	121	/* We don't allow link nodes in our Private Meta Data folder! */
9bccf70c	122	if (dcp->c_fileid == hfsmp->hfs_privdir_desc.cd_cnid)
1c79356b A	123	return (EPERM);
1c79356b A	124
9bccf70c	125	if (hfs_freeblks(hfsmp, 0) == 0)
1c79356b A	126	return (ENOSPC);
1c79356b A	127
9bccf70c A	128	/* Lock catalog b-tree */
9bccf70c A	129	retval = hfs_metafilelocking(hfsmp, kHFSCatalogFileID, LK_EXCLUSIVE, p);
b4c24cb9 A	130	if (retval) {
	131	return retval;
	132	}
1c79356b A	133
	134	/*
	135	* If this is a new hardlink then we need to create the data
	136	* node (inode) and replace the original file with a link node.
	137	*/
9bccf70c A	138	if (cp->c_nlink == 2 && (cp->c_flag & C_HARDLINK) == 0) {
	139	newlink = 1;
	140	bzero(&to_desc, sizeof(to_desc));
	141	to_desc.cd_parentcnid = hfsmp->hfs_privdir_desc.cd_cnid;
	142	to_desc.cd_cnid = cp->c_fileid;
b4c24cb9	143
1c79356b A	144	do {
	145	/* get a unique indirect node number */
	146	indnodeno = ((random() & 0x3fffffff) + 100);
	147	MAKE_INODE_NAME(inodename, indnodeno);
	148
	149	/* move source file to data node directory */
9bccf70c A	150	to_desc.cd_nameptr = inodename;
	151	to_desc.cd_namelen = strlen(inodename);
	152
	153	retval = cat_rename(hfsmp, &cp->c_desc, &hfsmp->hfs_privdir_desc,
	154	&to_desc, NULL);
1c79356b	155
9bccf70c A	156	} while (retval == EEXIST);
	157	if (retval)
	158	goto out;
1c79356b	159
9bccf70c A	160	/* Replace source file with link node */
	161	retval = createindirectlink(hfsmp, indnodeno, cp->c_parentcnid,
	162	cp->c_desc.cd_nameptr, &cp->c_desc.cd_cnid);
1c79356b A	163	if (retval) {
1c79356b A	164	/* put it source file back */
b4c24cb9 A	165	// XXXdbg
	166	#if 1
	167	{
	168	int err;
	169	err = cat_rename(hfsmp, &to_desc, &dcp->c_desc, &cp->c_desc, NULL);
	170	if (err)
	171	panic("hfs_makelink: error %d from cat_rename backout 1", err);
	172	}
	173	#else
9bccf70c	174	(void) cat_rename(hfsmp, &to_desc, &dcp->c_desc, &cp->c_desc, NULL);
b4c24cb9	175	#endif
1c79356b A	176	goto out;
1c79356b A	177	}
9bccf70c A	178	cp->c_rdev = indnodeno;
	179	} else {
	180	indnodeno = cp->c_rdev;
	181	}
1c79356b A	182
	183	/*
	184	* Create a catalog entry for the new link (parentID + name).
	185	*/
9bccf70c A	186	retval = createindirectlink(hfsmp, indnodeno, dcp->c_fileid, cnp->cn_nameptr, NULL);
	187	if (retval && newlink) {
	188	/* Get rid of new link */
	189	(void) cat_delete(hfsmp, &cp->c_desc, &cp->c_attr);
	190
	191	/* Put the source file back */
b4c24cb9 A	192	// XXXdbg
	193	#if 1
	194	{
	195	int err;
	196	err = cat_rename(hfsmp, &to_desc, &dcp->c_desc, &cp->c_desc, NULL);
	197	if (err)
	198	panic("hfs_makelink: error %d from cat_rename backout 2", err);
	199	}
	200	#else
9bccf70c	201	(void) cat_rename(hfsmp, &to_desc, &dcp->c_desc, &cp->c_desc, NULL);
b4c24cb9	202	#endif
1c79356b A	203	goto out;
	204	}
	205
	206	/*
9bccf70c A	207	* Finally, if this is a new hardlink then:
	208	* - update HFS Private Data dir
	209	* - mark the cnode as a hard link
1c79356b	210	*/
9bccf70c A	211	if (newlink) {
	212	hfsmp->hfs_privdir_attr.ca_entries++;
	213	(void)cat_update(hfsmp, &hfsmp->hfs_privdir_desc,
	214	&hfsmp->hfs_privdir_attr, NULL, NULL);
	215	hfs_volupdate(hfsmp, VOL_MKFILE, 0);
	216	cp->c_flag \|= (C_CHANGE \| C_HARDLINK);
1c79356b A	217	}
	218
	219	out:
9bccf70c A	220	/* Unlock catalog b-tree */
9bccf70c A	221	(void) hfs_metafilelocking(hfsmp, kHFSCatalogFileID, LK_RELEASE, p);
1c79356b A	222
	223	return (retval);
	224	}
	225
	226
	227	/*
	228	* link vnode call
	229	#% link vp U U U
	230	#% link tdvp L U U
	231	#
	232	vop_link {
	233	IN WILLRELE struct vnode *vp;
	234	IN struct vnode *targetPar_vp;
	235	IN struct componentname *cnp;
	236
	237	*/
	238	int
	239	hfs_link(ap)
9bccf70c A	240	struct vop_link_args /* {
	241	struct vnode *a_vp;
	242	struct vnode *a_tdvp;
	243	struct componentname *a_cnp;
	244	} / ap;
1c79356b	245	{
b4c24cb9	246	struct hfsmount *hfsmp;
1c79356b A	247	struct vnode *vp = ap->a_vp;
	248	struct vnode *tdvp = ap->a_tdvp;
	249	struct componentname *cnp = ap->a_cnp;
	250	struct proc *p = cnp->cn_proc;
9bccf70c A	251	struct cnode *cp;
9bccf70c A	252	struct cnode *tdcp;
1c79356b A	253	struct timeval tv;
	254	int error;
	255
b4c24cb9 A	256	hfsmp = VTOHFS(vp);
b4c24cb9 A	257
1c79356b A	258	#if HFS_DIAGNOSTIC
	259	if ((cnp->cn_flags & HASBUF) == 0)
	260	panic("hfs_link: no name");
	261	#endif
	262	if (tdvp->v_mount != vp->v_mount) {
	263	VOP_ABORTOP(tdvp, cnp);
	264	error = EXDEV;
	265	goto out2;
	266	}
	267	if (VTOVCB(tdvp)->vcbSigWord != kHFSPlusSigWord)
	268	return err_link(ap); /* hfs disks don't support hard links */
	269
b4c24cb9	270	if (hfsmp->hfs_private_metadata_dir == 0)
1c79356b A	271	return err_link(ap); /* no private metadata dir, no links possible */
	272
	273	if (tdvp != vp && (error = vn_lock(vp, LK_EXCLUSIVE, p))) {
	274	VOP_ABORTOP(tdvp, cnp);
	275	goto out2;
	276	}
9bccf70c A	277	cp = VTOC(vp);
	278	tdcp = VTOC(tdvp);
	279
	280	if (cp->c_nlink >= HFS_LINK_MAX) {
1c79356b A	281	VOP_ABORTOP(tdvp, cnp);
	282	error = EMLINK;
	283	goto out1;
	284	}
9bccf70c	285	if (cp->c_flags & (IMMUTABLE \| APPEND)) {
1c79356b A	286	VOP_ABORTOP(tdvp, cnp);
	287	error = EPERM;
	288	goto out1;
	289	}
	290	if (vp->v_type == VBLK \|\| vp->v_type == VCHR) {
	291	VOP_ABORTOP(tdvp, cnp);
	292	error = EINVAL; /* cannot link to a special file */
	293	goto out1;
	294	}
	295
b4c24cb9 A	296	hfs_global_shared_lock_acquire(hfsmp);
	297	if (hfsmp->jnl) {
	298	if (journal_start_transaction(hfsmp->jnl) != 0) {
	299	hfs_global_shared_lock_release(hfsmp);
d7e50217 A	300	VOP_ABORTOP(tdvp, cnp);
	301	error = EINVAL; /* cannot link to a special file */
	302	goto out1;
b4c24cb9 A	303	}
	304	}
	305
9bccf70c A	306	cp->c_nlink++;
9bccf70c A	307	cp->c_flag \|= C_CHANGE;
1c79356b	308	tv = time;
b4c24cb9	309
1c79356b	310	error = VOP_UPDATE(vp, &tv, &tv, 1);
b4c24cb9 A	311	if (!error) {
	312	error = hfs_makelink(hfsmp, cp, tdcp, cnp);
	313	}
1c79356b	314	if (error) {
9bccf70c A	315	cp->c_nlink--;
	316	cp->c_flag \|= C_CHANGE;
	317	} else {
	318	/* Update the target directory and volume stats */
	319	tdcp->c_nlink++;
	320	tdcp->c_entries++;
	321	tdcp->c_flag \|= C_CHANGE \| C_UPDATE;
	322	tv = time;
	323	(void) VOP_UPDATE(tdvp, &tv, &tv, 0);
b4c24cb9 A	324
b4c24cb9 A	325	hfs_volupdate(hfsmp, VOL_MKFILE,
9bccf70c	326	(tdcp->c_cnid == kHFSRootFolderID));
1c79356b	327	}
b4c24cb9 A	328
	329	// XXXdbg - need to do this here as well because cp could have changed
	330	error = VOP_UPDATE(vp, &tv, &tv, 1);
	331
1c79356b	332	FREE_ZONE(cnp->cn_pnbuf, cnp->cn_pnlen, M_NAMEI);
b4c24cb9 A	333
	334	if (hfsmp->jnl) {
	335	journal_end_transaction(hfsmp->jnl);
	336	}
	337	hfs_global_shared_lock_release(hfsmp);
	338
1c79356b A	339	out1:
	340	if (tdvp != vp)
	341	VOP_UNLOCK(vp, 0, p);
	342	out2:
	343	vput(tdvp);
	344	return (error);
	345	}