71 static int is_xattr_datum_unchecked(struct jffs2_sb_info *c, struct jffs2_xattr_datum *xd)  in is_xattr_datum_unchecked()  argument
77 	for (raw=xd->node; raw != (void *)xd; raw=raw->next_in_ino) {  in is_xattr_datum_unchecked()
87 static void unload_xattr_datum(struct jffs2_sb_info *c, struct jffs2_xattr_datum *xd)  in unload_xattr_datum()  argument
90 	D1(dbg_xattr("%s: xid=%u, version=%u\n", __func__, xd->xid, xd->version));  in unload_xattr_datum()
91 	if (xd->xname) {  in unload_xattr_datum()
92 		c->xdatum_mem_usage -= (xd->name_len + 1 + xd->value_len);  in unload_xattr_datum()
93 		kfree(xd->xname);  in unload_xattr_datum()
96 	list_del_init(&xd->xindex);  in unload_xattr_datum()
97 	xd->hashkey = 0;  in unload_xattr_datum()
98 	xd->xname = NULL;  in unload_xattr_datum()
99 	xd->xvalue = NULL;  in unload_xattr_datum()
105 	struct jffs2_xattr_datum *xd, *_xd;  in reclaim_xattr_datum()  local
116 		list_for_each_entry_safe(xd, _xd, &c->xattrindex[index], xindex) {  in reclaim_xattr_datum()
117 			if (xd->flags & JFFS2_XFLAGS_HOT) {  in reclaim_xattr_datum()
118 				xd->flags &= ~JFFS2_XFLAGS_HOT;  in reclaim_xattr_datum()
119 			} else if (!(xd->flags & JFFS2_XFLAGS_BIND)) {  in reclaim_xattr_datum()
120 				unload_xattr_datum(c, xd);  in reclaim_xattr_datum()
132 static int do_verify_xattr_datum(struct jffs2_sb_info *c, struct jffs2_xattr_datum *xd)  in do_verify_xattr_datum()  argument
143 	offset = ref_offset(xd->node);  in do_verify_xattr_datum()
144 	if (ref_flags(xd->node) == REF_PRISTINE)  in do_verify_xattr_datum()
158 		xd->flags |= JFFS2_XFLAGS_INVALID;  in do_verify_xattr_datum()
165 	    || je32_to_cpu(rx.xid) != xd->xid  in do_verify_xattr_datum()
166 	    || je32_to_cpu(rx.version) != xd->version) {  in do_verify_xattr_datum()
172 			    je32_to_cpu(rx.xid), xd->xid,  in do_verify_xattr_datum()
173 			    je32_to_cpu(rx.version), xd->version);  in do_verify_xattr_datum()
174 		xd->flags |= JFFS2_XFLAGS_INVALID;  in do_verify_xattr_datum()
177 	xd->xprefix = rx.xprefix;  in do_verify_xattr_datum()
178 	xd->name_len = rx.name_len;  in do_verify_xattr_datum()
179 	xd->value_len = je16_to_cpu(rx.value_len);  in do_verify_xattr_datum()
180 	xd->data_crc = je32_to_cpu(rx.data_crc);  in do_verify_xattr_datum()
184 	for (raw=xd->node; raw != (void *)xd; raw=raw->next_in_ino) {  in do_verify_xattr_datum()
191 		raw->flash_offset = ref_offset(raw) | ((xd->node==raw) ? REF_PRISTINE : REF_NORMAL);  in do_verify_xattr_datum()
196 	list_del_init(&xd->xindex);  in do_verify_xattr_datum()
199 		  xd->xid, xd->version);  in do_verify_xattr_datum()
204 static int do_load_xattr_datum(struct jffs2_sb_info *c, struct jffs2_xattr_datum *xd)  in do_load_xattr_datum()  argument
212 	BUG_ON(ref_flags(xd->node) != REF_PRISTINE);  in do_load_xattr_datum()
213 	BUG_ON(!list_empty(&xd->xindex));  in do_load_xattr_datum()
215 	length = xd->name_len + 1 + xd->value_len;  in do_load_xattr_datum()
220 	ret = jffs2_flash_read(c, ref_offset(xd->node)+sizeof(struct jffs2_raw_xattr),  in do_load_xattr_datum()
225 			      ret, length, readlen, ref_offset(xd->node));  in do_load_xattr_datum()
230 	data[xd->name_len] = '\0';  in do_load_xattr_datum()
232 	if (crc != xd->data_crc) {  in do_load_xattr_datum()
235 			      ref_offset(xd->node), xd->data_crc, crc);  in do_load_xattr_datum()
237 		xd->flags |= JFFS2_XFLAGS_INVALID;  in do_load_xattr_datum()
241 	xd->flags |= JFFS2_XFLAGS_HOT;  in do_load_xattr_datum()
242 	xd->xname = data;  in do_load_xattr_datum()
243 	xd->xvalue = data + xd->name_len+1;  in do_load_xattr_datum()
247 	xd->hashkey = xattr_datum_hashkey(xd->xprefix, xd->xname, xd->xvalue, xd->value_len);  in do_load_xattr_datum()
248 	i = xd->hashkey % XATTRINDEX_HASHSIZE;  in do_load_xattr_datum()
249 	list_add(&xd->xindex, &c->xattrindex[i]);  in do_load_xattr_datum()
253 		if (!xd->xname)  in do_load_xattr_datum()
258 		  xd->xid, xd->xprefix, xd->xname);  in do_load_xattr_datum()
263 static int load_xattr_datum(struct jffs2_sb_info *c, struct jffs2_xattr_datum *xd)  in load_xattr_datum()  argument
272 	BUG_ON(xd->flags & JFFS2_XFLAGS_DEAD);  in load_xattr_datum()
273 	if (xd->xname)  in load_xattr_datum()
275 	if (xd->flags & JFFS2_XFLAGS_INVALID)  in load_xattr_datum()
277 	if (unlikely(is_xattr_datum_unchecked(c, xd)))  in load_xattr_datum()
278 		rc = do_verify_xattr_datum(c, xd);  in load_xattr_datum()
280 		rc = do_load_xattr_datum(c, xd);  in load_xattr_datum()
284 static int save_xattr_datum(struct jffs2_sb_info *c, struct jffs2_xattr_datum *xd)  in save_xattr_datum()  argument
293 	BUG_ON(!xd->xname);  in save_xattr_datum()
294 	BUG_ON(xd->flags & (JFFS2_XFLAGS_DEAD|JFFS2_XFLAGS_INVALID));  in save_xattr_datum()
298 	vecs[1].iov_base = xd->xname;  in save_xattr_datum()
299 	vecs[1].iov_len = xd->name_len + 1 + xd->value_len;  in save_xattr_datum()
309 	rx.xid = cpu_to_je32(xd->xid);  in save_xattr_datum()
310 	rx.version = cpu_to_je32(++xd->version);  in save_xattr_datum()
311 	rx.xprefix = xd->xprefix;  in save_xattr_datum()
312 	rx.name_len = xd->name_len;  in save_xattr_datum()
313 	rx.value_len = cpu_to_je16(xd->value_len);  in save_xattr_datum()
328 	jffs2_add_physical_node_ref(c, phys_ofs | REF_PRISTINE, PAD(totlen), (void *)xd);  in save_xattr_datum()
331 		  xd->xid, xd->version, xd->xprefix, xd->xname);  in save_xattr_datum()
341 	struct jffs2_xattr_datum *xd;  in create_xattr_datum()  local
349 	list_for_each_entry(xd, &c->xattrindex[i], xindex) {  in create_xattr_datum()
350 		if (xd->hashkey==hashkey  in create_xattr_datum()
351 		    && xd->xprefix==xprefix  in create_xattr_datum()
352 		    && xd->value_len==xsize  in create_xattr_datum()
353 		    && !strcmp(xd->xname, xname)  in create_xattr_datum()
354 		    && !memcmp(xd->xvalue, xvalue, xsize)) {  in create_xattr_datum()
355 			atomic_inc(&xd->refcnt);  in create_xattr_datum()
356 			return xd;  in create_xattr_datum()
363 	xd = jffs2_alloc_xattr_datum();  in create_xattr_datum()
364 	if (!xd)  in create_xattr_datum()
369 		jffs2_free_xattr_datum(xd);  in create_xattr_datum()
375 	atomic_set(&xd->refcnt, 1);  in create_xattr_datum()
376 	xd->xid = ++c->highest_xid;  in create_xattr_datum()
377 	xd->flags |= JFFS2_XFLAGS_HOT;  in create_xattr_datum()
378 	xd->xprefix = xprefix;  in create_xattr_datum()
380 	xd->hashkey = hashkey;  in create_xattr_datum()
381 	xd->xname = data;  in create_xattr_datum()
382 	xd->xvalue = data + name_len + 1;  in create_xattr_datum()
383 	xd->name_len = name_len;  in create_xattr_datum()
384 	xd->value_len = xsize;  in create_xattr_datum()
385 	xd->data_crc = crc32(0, data, xd->name_len + 1 + xd->value_len);  in create_xattr_datum()
387 	rc = save_xattr_datum(c, xd);  in create_xattr_datum()
389 		kfree(xd->xname);  in create_xattr_datum()
390 		jffs2_free_xattr_datum(xd);  in create_xattr_datum()
396 	list_add(&xd->xindex, &c->xattrindex[i]);  in create_xattr_datum()
398 	c->xdatum_mem_usage += (xd->name_len + 1 + xd->value_len);  in create_xattr_datum()
401 	return xd;  in create_xattr_datum()
404 static void unrefer_xattr_datum(struct jffs2_sb_info *c, struct jffs2_xattr_datum *xd)  in unrefer_xattr_datum()  argument
407 	if (atomic_dec_and_lock(&xd->refcnt, &c->erase_completion_lock)) {  in unrefer_xattr_datum()
408 		unload_xattr_datum(c, xd);  in unrefer_xattr_datum()
409 		xd->flags |= JFFS2_XFLAGS_DEAD;  in unrefer_xattr_datum()
410 		if (xd->node == (void *)xd) {  in unrefer_xattr_datum()
411 			BUG_ON(!(xd->flags & JFFS2_XFLAGS_INVALID));  in unrefer_xattr_datum()
412 			jffs2_free_xattr_datum(xd);  in unrefer_xattr_datum()
414 			list_add(&xd->xindex, &c->xattr_dead_list);  in unrefer_xattr_datum()
419 			  xd->xid, xd->version);  in unrefer_xattr_datum()
526 		rr.xid = cpu_to_je32(ref->xd->xid);  in save_xattr_ref()
545 	dbg_xattr("success on saving xref (ino=%u, xid=%u)\n", ref->ic->ino, ref->xd->xid);  in save_xattr_ref()
551 						struct jffs2_xattr_datum *xd)  in create_xattr_ref()  argument
561 	ref->xd = xd;  in create_xattr_ref()
579 	struct jffs2_xattr_datum *xd;  in delete_xattr_ref()  local
581 	xd = ref->xd;  in delete_xattr_ref()
584 	ref->xid = ref->xd->xid;  in delete_xattr_ref()
593 	unrefer_xattr_datum(c, xd);  in delete_xattr_ref()
617 	struct jffs2_xattr_datum *xd;  in jffs2_xattr_free_inode()  local
623 		xd = ref->xd;  in jffs2_xattr_free_inode()
624 		if (atomic_dec_and_test(&xd->refcnt)) {  in jffs2_xattr_free_inode()
625 			unload_xattr_datum(c, xd);  in jffs2_xattr_free_inode()
626 			jffs2_free_xattr_datum(xd);  in jffs2_xattr_free_inode()
649 		if (!ref->xd->xname) {  in check_xattr_ref_inode()
650 			rc = load_xattr_datum(c, ref->xd);  in check_xattr_ref_inode()
659 			if (!cmp->xd->xname) {  in check_xattr_ref_inode()
660 				ref->xd->flags |= JFFS2_XFLAGS_BIND;  in check_xattr_ref_inode()
661 				rc = load_xattr_datum(c, cmp->xd);  in check_xattr_ref_inode()
662 				ref->xd->flags &= ~JFFS2_XFLAGS_BIND;  in check_xattr_ref_inode()
670 			if (ref->xd->xprefix == cmp->xd->xprefix  in check_xattr_ref_inode()
671 			    && !strcmp(ref->xd->xname, cmp->xd->xname)) {  in check_xattr_ref_inode()
727 	struct jffs2_xattr_datum *xd;  in jffs2_find_xattr_datum()  local
733 	list_for_each_entry(xd, &c->xattrindex[i], xindex) {  in jffs2_find_xattr_datum()
734 		if (xd->xid==xid)  in jffs2_find_xattr_datum()
735 			return xd;  in jffs2_find_xattr_datum()
742 	struct jffs2_xattr_datum *xd, *_xd;  in jffs2_clear_xattr_subsystem()  local
757 		list_for_each_entry_safe(xd, _xd, &c->xattrindex[i], xindex) {  in jffs2_clear_xattr_subsystem()
758 			list_del(&xd->xindex);  in jffs2_clear_xattr_subsystem()
759 			kfree(xd->xname);  in jffs2_clear_xattr_subsystem()
760 			jffs2_free_xattr_datum(xd);  in jffs2_clear_xattr_subsystem()
764 	list_for_each_entry_safe(xd, _xd, &c->xattr_dead_list, xindex) {  in jffs2_clear_xattr_subsystem()
765 		list_del(&xd->xindex);  in jffs2_clear_xattr_subsystem()
766 		jffs2_free_xattr_datum(xd);  in jffs2_clear_xattr_subsystem()
768 	list_for_each_entry_safe(xd, _xd, &c->xattr_unchecked, xindex) {  in jffs2_clear_xattr_subsystem()
769 		list_del(&xd->xindex);  in jffs2_clear_xattr_subsystem()
770 		jffs2_free_xattr_datum(xd);  in jffs2_clear_xattr_subsystem()
779 	struct jffs2_xattr_datum *xd, *_xd;  in jffs2_build_xattr_subsystem()  local
841 			xd = jffs2_find_xattr_datum(c, ref->xid);  in jffs2_build_xattr_subsystem()
843 			if (!xd || !ic || !ic->pino_nlink) {  in jffs2_build_xattr_subsystem()
852 			ref->xd = xd;  in jffs2_build_xattr_subsystem()
854 			atomic_inc(&xd->refcnt);  in jffs2_build_xattr_subsystem()
862 		list_for_each_entry_safe(xd, _xd, &c->xattrindex[i], xindex) {  in jffs2_build_xattr_subsystem()
864 			list_del_init(&xd->xindex);  in jffs2_build_xattr_subsystem()
865 			if (!atomic_read(&xd->refcnt)) {  in jffs2_build_xattr_subsystem()
867 					  xd->xid, xd->version);  in jffs2_build_xattr_subsystem()
868 				xd->flags |= JFFS2_XFLAGS_DEAD;  in jffs2_build_xattr_subsystem()
869 				list_add(&xd->xindex, &c->xattr_unchecked);  in jffs2_build_xattr_subsystem()
873 			if (is_xattr_datum_unchecked(c, xd)) {  in jffs2_build_xattr_subsystem()
875 					  xd->xid, xd->version);  in jffs2_build_xattr_subsystem()
876 				list_add(&xd->xindex, &c->xattr_unchecked);  in jffs2_build_xattr_subsystem()
892 	struct jffs2_xattr_datum *xd;  in jffs2_setup_xattr_datum()  local
894 	xd = jffs2_find_xattr_datum(c, xid);  in jffs2_setup_xattr_datum()
895 	if (!xd) {  in jffs2_setup_xattr_datum()
896 		xd = jffs2_alloc_xattr_datum();  in jffs2_setup_xattr_datum()
897 		if (!xd)  in jffs2_setup_xattr_datum()
899 		xd->xid = xid;  in jffs2_setup_xattr_datum()
900 		xd->version = version;  in jffs2_setup_xattr_datum()
901 		if (xd->xid > c->highest_xid)  in jffs2_setup_xattr_datum()
902 			c->highest_xid = xd->xid;  in jffs2_setup_xattr_datum()
903 		list_add_tail(&xd->xindex, &c->xattrindex[xid % XATTRINDEX_HASHSIZE]);  in jffs2_setup_xattr_datum()
905 	return xd;  in jffs2_setup_xattr_datum()
968 	struct jffs2_xattr_datum *xd;  in jffs2_listxattr()  local
983 		xd = ref->xd;  in jffs2_listxattr()
984 		if (!xd->xname) {  in jffs2_listxattr()
992 				rc = load_xattr_datum(c, xd);  in jffs2_listxattr()
1001 		xhandle = xprefix_to_handler(xd->xprefix);  in jffs2_listxattr()
1006 		rc = prefix_len + xd->name_len + 1;  in jffs2_listxattr()
1015 			memcpy(buffer, xd->xname, xd->name_len);  in jffs2_listxattr()
1016 			buffer += xd->name_len;  in jffs2_listxattr()
1037 	struct jffs2_xattr_datum *xd;  in do_jffs2_getxattr()  local
1050 		xd = ref->xd;  in do_jffs2_getxattr()
1051 		if (xd->xprefix != xprefix)  in do_jffs2_getxattr()
1053 		if (!xd->xname) {  in do_jffs2_getxattr()
1061 				rc = load_xattr_datum(c, xd);  in do_jffs2_getxattr()
1071 		if (!strcmp(xname, xd->xname)) {  in do_jffs2_getxattr()
1072 			rc = xd->value_len;  in do_jffs2_getxattr()
1077 					memcpy(buffer, xd->xvalue, rc);  in do_jffs2_getxattr()
1099 	struct jffs2_xattr_datum *xd;  in do_jffs2_setxattr()  local
1120 		xd = ref->xd;  in do_jffs2_setxattr()
1121 		if (xd->xprefix != xprefix)  in do_jffs2_setxattr()
1123 		if (!xd->xname) {  in do_jffs2_setxattr()
1124 			rc = load_xattr_datum(c, xd);  in do_jffs2_setxattr()
1132 		if (!strcmp(xd->xname, xname)) {  in do_jffs2_setxattr()
1139 				ref->xid = xd->xid;  in do_jffs2_setxattr()
1148 					unrefer_xattr_datum(c, xd);  in do_jffs2_setxattr()
1151 					ref->xd = xd;  in do_jffs2_setxattr()
1169 	xd = create_xattr_datum(c, xprefix, xname, buffer, size);  in do_jffs2_setxattr()
1170 	if (IS_ERR(xd)) {  in do_jffs2_setxattr()
1171 		rc = PTR_ERR(xd);  in do_jffs2_setxattr()
1184 		unrefer_xattr_datum(c, xd);  in do_jffs2_setxattr()
1190 	newref = create_xattr_ref(c, ic, xd);  in do_jffs2_setxattr()
1197 		unrefer_xattr_datum(c, xd);  in do_jffs2_setxattr()
1219 int jffs2_garbage_collect_xattr_datum(struct jffs2_sb_info *c, struct jffs2_xattr_datum *xd,  in jffs2_garbage_collect_xattr_datum()  argument
1226 	if (xd->node != raw)  in jffs2_garbage_collect_xattr_datum()
1228 	if (xd->flags & (JFFS2_XFLAGS_DEAD|JFFS2_XFLAGS_INVALID))  in jffs2_garbage_collect_xattr_datum()
1231 	rc = load_xattr_datum(c, xd);  in jffs2_garbage_collect_xattr_datum()
1236 	old_ofs = ref_offset(xd->node);  in jffs2_garbage_collect_xattr_datum()
1238 			+ xd->name_len + 1 + xd->value_len);  in jffs2_garbage_collect_xattr_datum()
1244 	rc = save_xattr_datum(c, xd);  in jffs2_garbage_collect_xattr_datum()
1247 			  xd->xid, xd->version, old_ofs, ref_offset(xd->node));  in jffs2_garbage_collect_xattr_datum()
1281 			  ref->ic->ino, ref->xd->xid, old_ofs, ref_offset(ref->node));  in jffs2_garbage_collect_xattr_ref()
1291 	struct jffs2_xattr_datum *xd, *_xd;  in jffs2_verify_xattr()  local
1298 	list_for_each_entry_safe(xd, _xd, &c->xattr_unchecked, xindex) {  in jffs2_verify_xattr()
1299 		rc = do_verify_xattr_datum(c, xd);  in jffs2_verify_xattr()
1302 		list_del_init(&xd->xindex);  in jffs2_verify_xattr()
1304 		for (raw=xd->node; raw != (void *)xd; raw=raw->next_in_ino) {  in jffs2_verify_xattr()
1312 				| ((xd->node == (void *)raw) ? REF_PRISTINE : REF_NORMAL);  in jffs2_verify_xattr()
1314 		if (xd->flags & JFFS2_XFLAGS_DEAD)  in jffs2_verify_xattr()
1315 			list_add(&xd->xindex, &c->xattr_dead_list);  in jffs2_verify_xattr()
1322 void jffs2_release_xattr_datum(struct jffs2_sb_info *c, struct jffs2_xattr_datum *xd)  in jffs2_release_xattr_datum()  argument
1325 	if (atomic_read(&xd->refcnt) || xd->node != (void *)xd)  in jffs2_release_xattr_datum()
1328 	list_del(&xd->xindex);  in jffs2_release_xattr_datum()
1329 	jffs2_free_xattr_datum(xd);  in jffs2_release_xattr_datum()