bsd/hfs/hfs_link.c

65 int hfs_makelink(struct hfsmount *hfsmp, struct vnode *src_vp, struct cnode *cp,
126  * Make a link to the cnode cp in the directory dp
128  * corresponds to 'cp' which was part of the arguments to
131  * The cnodes cp and dcp must be locked.
134 hfs_makelink(struct hfsmount *hfsmp, struct vnode *src_vp, struct cnode *cp,
152 	type = S_ISDIR(cp->c_mode) ? DIR_HARDLINKS : FILE_HARDLINKS;
178 	orig_cnid = cp->c_desc.cd_cnid;
184 	if ((cp->c_linkcount == 2) && !(cp->c_flag & C_HARDLINK)) {
188 		to_desc.cd_cnid = cp->c_fileid;
194 				indnodeno = cp->c_fileid;
200 					indnodeno = cp->c_fileid;
211 			retval = cat_rename(hfsmp, &cp->c_desc, &hfsmp->hfs_private_desc[type],
216 				inodename, retval, cp->c_fileid);
227 		link_desc.cd_nameptr = cp->c_desc.cd_nameptr;
228 		link_desc.cd_namelen = cp->c_desc.cd_namelen;
229 		link_desc.cd_parentcnid = cp->c_parentcnid;
230 		link_desc.cd_flags = S_ISDIR(cp->c_mode) ? CD_ISDIR : 0;
237 			cp->c_desc.cd_cnid = orig_cnid;
240 			err = cat_rename(hfsmp, &to_desc, &dcp->c_desc, &cp->c_desc, NULL);
245 		cp->c_attr.ca_linkref = indnodeno;
246 		cp->c_desc.cd_cnid = linkcnid;
249 			if (setfirstlink(hfsmp, cp->c_fileid, linkcnid) == 0)
250 				cp->c_attr.ca_recflags |= kHFSHasAttributesMask;
252 			cp->c_attr.ca_firstlink = linkcnid;
254 		cp->c_attr.ca_recflags |= kHFSHasLinkChainMask;
256 		indnodeno = cp->c_attr.ca_linkref;
267 	link_desc.cd_flags = S_ISDIR(cp->c_mode) ? CD_ISDIR : 0;
271 		retval = getfirstlink(hfsmp, cp->c_fileid, &orig_firstlink);
273 		orig_firstlink = cp->c_attr.ca_firstlink;
278 				(cp->c_attr.ca_recflags & kHFSHasLinkChainMask));
283 		(void) cat_delete(hfsmp, &cp->c_desc, &cp->c_attr);
286 		cp->c_desc.cd_cnid = orig_cnid;
289 		err = cat_rename(hfsmp, &to_desc, &dcp->c_desc, &cp->c_desc, NULL);
293 		cp->c_attr.ca_linkref = 0;
298 	    if (cp->c_attr.ca_recflags & kHFSHasLinkChainMask) {
303 		    if (setfirstlink(hfsmp, cp->c_fileid, linkcnid) == 0)
304 			cp->c_attr.ca_recflags |= kHFSHasAttributesMask;
306 		    cp->c_attr.ca_firstlink = linkcnid;
334 		cp->c_flag |= C_HARDLINK;
353 		if ((vp = cp->c_vp) != NULLVP) {
361 					cp->c_flag |= C_NEED_DVNODE_PUT;
365 		if ((vp = cp->c_rsrc_vp) != NULLVP) {
372 					cp->c_flag |= C_NEED_RVNODE_PUT;
376 		cp->c_touch_chgtime = TRUE;
377 		cp->c_flag |= C_FORCEUPDATE;
409 	struct cnode *cp;
478 	cp = VTOC(vp);
480 	parentcnid = hfs_currentparent(cp);
502 	if (cp->c_linkcount >= HFS_LINK_MAX) {
506 	if (cp->c_bsdflags & (IMMUTABLE | APPEND)) {
510 	if (cp->c_flag & (C_NOEXISTS | C_DELETED)) {
538 	if (cp->c_flag & C_HARDLINK) {
542 		if ((cat_idlookup(hfsmp, cp->c_fileid, 0, 0, NULL, &cattr, NULL) != 0) ||
543 		    (cattr.ca_fileid != cp->c_fileid)) {
551 		if ((cat_lookup(hfsmp, &cp->c_desc, 0, NULL, NULL, NULL, &fileid) != 0) ||
552 		    (fileid != cp->c_fileid)) {
573 		    cat_check_link_ancestry(hfsmp, tdcp->c_fileid, cp->c_fileid)) {
581 	cp->c_linkcount++;
582 	cp->c_touch_chgtime = TRUE;
583 	error = hfs_makelink(hfsmp, vp, cp, tdcp, cnp);
585 		cp->c_linkcount--;
640 	cp->c_flag |= C_FORCEUPDATE;
658 		hfs_unlockfour(tdcp, cp, fdcp, NULL);
660 		hfs_unlockpair(tdcp, cp);
677 	struct cnode *cp;
691 	cp = VTOC(vp);
708 	 * the cp->c_desc which may have changed).
715 	cndesc.cd_encoding = cp->c_desc.cd_encoding;
738 	hfs_relorigin(cp, dcp->c_fileid);
740 		hfs_relorigin(cp, dcp->c_cnid);
765 	--cp->c_linkcount;
766 	if (cp->c_linkcount < 1) {
782 			if (cp->c_entries != 0) {
783 				panic("hfs_unlink: dir not empty (id %d, %d entries)", cp->c_fileid, cp->c_entries);
786 						cp->c_attr.ca_linkref);
792 					cp->c_attr.ca_linkref);
799 		from_desc.cd_cnid = cp->c_fileid;
801 		MAKE_DELETED_NAME(delname, sizeof(delname), cp->c_fileid);
805 		to_desc.cd_cnid = cp->c_fileid;
810 			cp->c_flag |= C_DELETED;
811 			cp->c_attr.ca_recflags &= ~kHFSHasLinkChainMask;
812 			cp->c_attr.ca_firstlink = 0;
836 		    getfirstlink(hfsmp, cp->c_fileid, &firstlink) == 0 &&
838 			if (setfirstlink(hfsmp, cp->c_fileid, nextlinkid) == 0)
839 				cp->c_attr.ca_recflags |= kHFSHasAttributesMask;
840 		} else if (vnode_isreg(vp) && cp->c_attr.ca_firstlink == cndesc.cd_cnid) {
841 			cp->c_attr.ca_firstlink = nextlinkid;
854 	cp->c_ctime = tv.tv_sec;
855 	(void) cat_update(hfsmp, &cp->c_desc, &cp->c_attr, NULL, NULL);
871 	cat_releasedesc(&cp->c_desc);
1053 hfs_savelinkorigin(cnode_t *cp, cnid_t parentcnid)
1058 	int maxorigins = (S_ISDIR(cp->c_mode)) ? MAX_CACHED_ORIGINS : MAX_CACHED_FILE_ORIGINS;
1062 	TAILQ_FOREACH(origin, &cp->c_originlist, lo_link) {
1065 			TAILQ_REMOVE(&cp->c_originlist, origin, lo_link);
1072 			origin = TAILQ_LAST(&cp->c_originlist, hfs_originhead);
1073 			TAILQ_REMOVE(&cp->c_originlist, origin, lo_link);
1079 	origin->lo_cnid = cp->c_cnid;
1081 	TAILQ_INSERT_HEAD(&cp->c_originlist, origin, lo_link);
1091 hfs_relorigins(struct cnode *cp)
1095 	TAILQ_FOREACH_SAFE(origin, &cp->c_originlist, lo_link, prev) {
1098 	TAILQ_INIT(&cp->c_originlist);
1108 hfs_relorigin(struct cnode *cp, cnid_t parentcnid)
1113 	TAILQ_FOREACH_SAFE(origin, &cp->c_originlist, lo_link, prev) {
1116 			TAILQ_REMOVE(&cp->c_originlist, origin, lo_link);
1130 hfs_haslinkorigin(cnode_t *cp)
1132 	if (cp->c_flag & C_HARDLINK) {
1136 		TAILQ_FOREACH(origin, &cp->c_originlist, lo_link) {
1152 hfs_currentparent(cnode_t *cp)
1154 	if (cp->c_flag & C_HARDLINK) {
1158 		TAILQ_FOREACH(origin, &cp->c_originlist, lo_link) {
1164 	return (cp->c_parentcnid);
1174 hfs_currentcnid(cnode_t *cp)
1176 	if (cp->c_flag & C_HARDLINK) {
1180 		TAILQ_FOREACH(origin, &cp->c_originlist, lo_link) {
1186 	return (cp->c_cnid);