71 static int is_xattr_datum_unchecked(struct jffs2_sb_info *c, struct jffs2_xattr_datum *xd)  in is_xattr_datum_unchecked()  argument
76 	spin_lock(&c->erase_completion_lock);  in is_xattr_datum_unchecked()
83 	spin_unlock(&c->erase_completion_lock);  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
92 		c->xdatum_mem_usage -= (xd->name_len + 1 + xd->value_len);  in unload_xattr_datum()
102 static void reclaim_xattr_datum(struct jffs2_sb_info *c)  in reclaim_xattr_datum()  argument
110 	if (c->xdatum_mem_threshold > c->xdatum_mem_usage)  in reclaim_xattr_datum()
113 	before = c->xdatum_mem_usage;  in reclaim_xattr_datum()
114 	target = c->xdatum_mem_usage * 4 / 5; /* 20% reduction */  in reclaim_xattr_datum()
116 		list_for_each_entry_safe(xd, _xd, &c->xattrindex[index], xindex) {  in reclaim_xattr_datum()
120 				unload_xattr_datum(c, xd);  in reclaim_xattr_datum()
122 			if (c->xdatum_mem_usage <= target)  in reclaim_xattr_datum()
129 		     before, c->xdatum_mem_usage, before - c->xdatum_mem_usage);  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
142 	spin_lock(&c->erase_completion_lock);  in do_verify_xattr_datum()
146 	spin_unlock(&c->erase_completion_lock);  in do_verify_xattr_datum()
148 	rc = jffs2_flash_read(c, offset, sizeof(rx), &readlen, (char *)&rx);  in do_verify_xattr_datum()
182 	spin_lock(&c->erase_completion_lock);  in do_verify_xattr_datum()
185 		jeb = &c->blocks[ref_offset(raw) / c->sector_size];  in do_verify_xattr_datum()
186 		totlen = PAD(ref_totlen(c, jeb, raw));  in do_verify_xattr_datum()
188 			c->unchecked_size -= totlen; c->used_size += totlen;  in do_verify_xattr_datum()
193 	spin_unlock(&c->erase_completion_lock);  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
220 	ret = jffs2_flash_read(c, ref_offset(xd->node)+sizeof(struct jffs2_raw_xattr),  in do_load_xattr_datum()
245 	c->xdatum_mem_usage += length;  in do_load_xattr_datum()
249 	list_add(&xd->xindex, &c->xattrindex[i]);  in do_load_xattr_datum()
252 		reclaim_xattr_datum(c);  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
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
291 	uint32_t phys_ofs = write_ofs(c);  in save_xattr_datum()
317 	rc = jffs2_flash_writev(c, vecs, 2, phys_ofs, &length, 0);  in save_xattr_datum()
323 			jffs2_add_physical_node_ref(c, phys_ofs | REF_OBSOLETE, PAD(totlen), NULL);  in save_xattr_datum()
328 	jffs2_add_physical_node_ref(c, phys_ofs | REF_PRISTINE, PAD(totlen), (void *)xd);  in save_xattr_datum()
336 static struct jffs2_xattr_datum *create_xattr_datum(struct jffs2_sb_info *c,  in create_xattr_datum()  argument
349 	list_for_each_entry(xd, &c->xattrindex[i], xindex) {  in create_xattr_datum()
376 	xd->xid = ++c->highest_xid;  in create_xattr_datum()
387 	rc = save_xattr_datum(c, 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()
399 	reclaim_xattr_datum(c);  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()
414 			list_add(&xd->xindex, &c->xattr_dead_list);  in unrefer_xattr_datum()
416 		spin_unlock(&c->erase_completion_lock);  in unrefer_xattr_datum()
444 static int verify_xattr_ref(struct jffs2_sb_info *c, struct jffs2_xattr_ref *ref)  in verify_xattr_ref()  argument
453 	spin_lock(&c->erase_completion_lock);  in verify_xattr_ref()
457 	spin_unlock(&c->erase_completion_lock);  in verify_xattr_ref()
459 	rc = jffs2_flash_read(c, offset, sizeof(rr), &readlen, (char *)&rr);  in verify_xattr_ref()
485 	if (ref->xseqno > c->highest_xseqno)  in verify_xattr_ref()
486 		c->highest_xseqno = (ref->xseqno & ~XREF_DELETE_MARKER);  in verify_xattr_ref()
488 	spin_lock(&c->erase_completion_lock);  in verify_xattr_ref()
491 		jeb = &c->blocks[ref_offset(raw) / c->sector_size];  in verify_xattr_ref()
492 		totlen = PAD(ref_totlen(c, jeb, raw));  in verify_xattr_ref()
494 			c->unchecked_size -= totlen; c->used_size += totlen;  in verify_xattr_ref()
499 	spin_unlock(&c->erase_completion_lock);  in verify_xattr_ref()
506 static int save_xattr_ref(struct jffs2_sb_info *c, struct jffs2_xattr_ref *ref)  in save_xattr_ref()  argument
511 	uint32_t xseqno, phys_ofs = write_ofs(c);  in save_xattr_ref()
519 	xseqno = (c->highest_xseqno += 2);  in save_xattr_ref()
531 	ret = jffs2_flash_write(c, phys_ofs, sizeof(rr), &length, (char *)&rr);  in save_xattr_ref()
537 			jffs2_add_physical_node_ref(c, phys_ofs | REF_OBSOLETE, PAD(sizeof(rr)), NULL);  in save_xattr_ref()
543 	jffs2_add_physical_node_ref(c, phys_ofs | REF_PRISTINE, PAD(sizeof(rr)), (void *)ref);  in save_xattr_ref()
550 static struct jffs2_xattr_ref *create_xattr_ref(struct jffs2_sb_info *c, struct jffs2_inode_cache *…  in create_xattr_ref()  argument
563 	ret = save_xattr_ref(c, ref);  in create_xattr_ref()
576 static void delete_xattr_ref(struct jffs2_sb_info *c, struct jffs2_xattr_ref *ref)  in delete_xattr_ref()  argument
585 	spin_lock(&c->erase_completion_lock);  in delete_xattr_ref()
586 	ref->next = c->xref_dead_list;  in delete_xattr_ref()
587 	c->xref_dead_list = ref;  in delete_xattr_ref()
588 	spin_unlock(&c->erase_completion_lock);  in delete_xattr_ref()
593 	unrefer_xattr_datum(c, xd);  in delete_xattr_ref()
596 void jffs2_xattr_delete_inode(struct jffs2_sb_info *c, struct jffs2_inode_cache *ic)  in jffs2_xattr_delete_inode()  argument
605 	down_write(&c->xattr_sem);  in jffs2_xattr_delete_inode()
608 		delete_xattr_ref(c, ref);  in jffs2_xattr_delete_inode()
611 	up_write(&c->xattr_sem);  in jffs2_xattr_delete_inode()
614 void jffs2_xattr_free_inode(struct jffs2_sb_info *c, struct jffs2_inode_cache *ic)  in jffs2_xattr_free_inode()  argument
620 	down_write(&c->xattr_sem);  in jffs2_xattr_free_inode()
625 			unload_xattr_datum(c, xd);  in jffs2_xattr_free_inode()
631 	up_write(&c->xattr_sem);  in jffs2_xattr_free_inode()
634 static int check_xattr_ref_inode(struct jffs2_sb_info *c, struct jffs2_inode_cache *ic)  in check_xattr_ref_inode()  argument
645 	down_write(&c->xattr_sem);  in check_xattr_ref_inode()
650 			rc = load_xattr_datum(c, ref->xd);  in check_xattr_ref_inode()
653 				delete_xattr_ref(c, ref);  in check_xattr_ref_inode()
661 				rc = load_xattr_datum(c, cmp->xd);  in check_xattr_ref_inode()
665 					delete_xattr_ref(c, cmp);  in check_xattr_ref_inode()
674 					delete_xattr_ref(c, cmp);  in check_xattr_ref_inode()
677 					delete_xattr_ref(c, ref);  in check_xattr_ref_inode()
685 	up_write(&c->xattr_sem);  in check_xattr_ref_inode()
690 void jffs2_xattr_do_crccheck_inode(struct jffs2_sb_info *c, struct jffs2_inode_cache *ic)  in jffs2_xattr_do_crccheck_inode()  argument
692 	check_xattr_ref_inode(c, ic);  in jffs2_xattr_do_crccheck_inode()
707 void jffs2_init_xattr_subsystem(struct jffs2_sb_info *c)  in jffs2_init_xattr_subsystem()  argument
712 		INIT_LIST_HEAD(&c->xattrindex[i]);  in jffs2_init_xattr_subsystem()
713 	INIT_LIST_HEAD(&c->xattr_unchecked);  in jffs2_init_xattr_subsystem()
714 	INIT_LIST_HEAD(&c->xattr_dead_list);  in jffs2_init_xattr_subsystem()
715 	c->xref_dead_list = NULL;  in jffs2_init_xattr_subsystem()
716 	c->xref_temp = NULL;  in jffs2_init_xattr_subsystem()
718 	init_rwsem(&c->xattr_sem);  in jffs2_init_xattr_subsystem()
719 	c->highest_xid = 0;  in jffs2_init_xattr_subsystem()
720 	c->highest_xseqno = 0;  in jffs2_init_xattr_subsystem()
721 	c->xdatum_mem_usage = 0;  in jffs2_init_xattr_subsystem()
722 	c->xdatum_mem_threshold = 32 * 1024;	/* Default 32KB */  in jffs2_init_xattr_subsystem()
725 static struct jffs2_xattr_datum *jffs2_find_xattr_datum(struct jffs2_sb_info *c, uint32_t xid)  in jffs2_find_xattr_datum()  argument
731 	BUG_ON(!(c->flags & (JFFS2_SB_FLAG_SCANNING|JFFS2_SB_FLAG_BUILDING)));  in jffs2_find_xattr_datum()
733 	list_for_each_entry(xd, &c->xattrindex[i], xindex) {  in jffs2_find_xattr_datum()
740 void jffs2_clear_xattr_subsystem(struct jffs2_sb_info *c)  in jffs2_clear_xattr_subsystem()  argument
746 	for (ref=c->xref_temp; ref; ref = _ref) {  in jffs2_clear_xattr_subsystem()
751 	for (ref=c->xref_dead_list; ref; ref = _ref) {  in jffs2_clear_xattr_subsystem()
757 		list_for_each_entry_safe(xd, _xd, &c->xattrindex[i], xindex) {  in jffs2_clear_xattr_subsystem()
764 	list_for_each_entry_safe(xd, _xd, &c->xattr_dead_list, xindex) {  in jffs2_clear_xattr_subsystem()
768 	list_for_each_entry_safe(xd, _xd, &c->xattr_unchecked, xindex) {  in jffs2_clear_xattr_subsystem()
775 void jffs2_build_xattr_subsystem(struct jffs2_sb_info *c)  in jffs2_build_xattr_subsystem()  argument
785 	BUG_ON(!(c->flags & JFFS2_SB_FLAG_BUILDING));  in jffs2_build_xattr_subsystem()
790 	for (ref=c->xref_temp; ref; ref=_ref) {  in jffs2_build_xattr_subsystem()
795 			if (verify_xattr_ref(c, ref)) {  in jffs2_build_xattr_subsystem()
798 				jffs2_mark_node_obsolete(c, ref->node);  in jffs2_build_xattr_subsystem()
826 	c->xref_temp = NULL;  in jffs2_build_xattr_subsystem()
834 				ref->next = c->xref_dead_list;  in jffs2_build_xattr_subsystem()
835 				c->xref_dead_list = ref;  in jffs2_build_xattr_subsystem()
841 			xd = jffs2_find_xattr_datum(c, ref->xid);  in jffs2_build_xattr_subsystem()
842 			ic = jffs2_get_ino_cache(c, ref->ino);  in jffs2_build_xattr_subsystem()
847 				ref->next = c->xref_dead_list;  in jffs2_build_xattr_subsystem()
848 				c->xref_dead_list = ref;  in jffs2_build_xattr_subsystem()
862 		list_for_each_entry_safe(xd, _xd, &c->xattrindex[i], xindex) {  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()
876 				list_add(&xd->xindex, &c->xattr_unchecked);  in jffs2_build_xattr_subsystem()
889 struct jffs2_xattr_datum *jffs2_setup_xattr_datum(struct jffs2_sb_info *c,  in jffs2_setup_xattr_datum()  argument
894 	xd = jffs2_find_xattr_datum(c, xid);  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()
965 	struct jffs2_sb_info *c = JFFS2_SB_INFO(inode->i_sb);  in jffs2_listxattr()  local
973 	rc = check_xattr_ref_inode(c, ic);  in jffs2_listxattr()
977 	down_read(&c->xattr_sem);  in jffs2_listxattr()
987 				up_read(&c->xattr_sem);  in jffs2_listxattr()
988 				down_write(&c->xattr_sem);  in jffs2_listxattr()
991 				rc = load_xattr_datum(c, xd);  in jffs2_listxattr()
994 					delete_xattr_ref(c, ref);  in jffs2_listxattr()
1017 		up_read(&c->xattr_sem);  in jffs2_listxattr()
1019 		up_write(&c->xattr_sem);  in jffs2_listxattr()
1028 	struct jffs2_sb_info *c = JFFS2_SB_INFO(inode->i_sb);  in do_jffs2_getxattr()  local
1034 	rc = check_xattr_ref_inode(c, ic);  in do_jffs2_getxattr()
1038 	down_read(&c->xattr_sem);  in do_jffs2_getxattr()
1050 				up_read(&c->xattr_sem);  in do_jffs2_getxattr()
1051 				down_write(&c->xattr_sem);  in do_jffs2_getxattr()
1054 				rc = load_xattr_datum(c, xd);  in do_jffs2_getxattr()
1057 					delete_xattr_ref(c, ref);  in do_jffs2_getxattr()
1079 		up_read(&c->xattr_sem);  in do_jffs2_getxattr()
1081 		up_write(&c->xattr_sem);  in do_jffs2_getxattr()
1090 	struct jffs2_sb_info *c = JFFS2_SB_INFO(inode->i_sb);  in do_jffs2_setxattr()  local
1097 	rc = check_xattr_ref_inode(c, ic);  in do_jffs2_setxattr()
1102 	rc = jffs2_reserve_space(c, request, &length,  in do_jffs2_setxattr()
1110 	down_write(&c->xattr_sem);  in do_jffs2_setxattr()
1117 			rc = load_xattr_datum(c, xd);  in do_jffs2_setxattr()
1120 				delete_xattr_ref(c, ref);  in do_jffs2_setxattr()
1134 				rc = save_xattr_ref(c, ref);  in do_jffs2_setxattr()
1137 					spin_lock(&c->erase_completion_lock);  in do_jffs2_setxattr()
1138 					ref->next = c->xref_dead_list;  in do_jffs2_setxattr()
1139 					c->xref_dead_list = ref;  in do_jffs2_setxattr()
1140 					spin_unlock(&c->erase_completion_lock);  in do_jffs2_setxattr()
1141 					unrefer_xattr_datum(c, xd);  in do_jffs2_setxattr()
1162 	xd = create_xattr_datum(c, xprefix, xname, buffer, size);  in do_jffs2_setxattr()
1167 	up_write(&c->xattr_sem);  in do_jffs2_setxattr()
1168 	jffs2_complete_reservation(c);  in do_jffs2_setxattr()
1172 	rc = jffs2_reserve_space(c, request, &length,  in do_jffs2_setxattr()
1174 	down_write(&c->xattr_sem);  in do_jffs2_setxattr()
1177 		unrefer_xattr_datum(c, xd);  in do_jffs2_setxattr()
1178 		up_write(&c->xattr_sem);  in do_jffs2_setxattr()
1183 	newref = create_xattr_ref(c, ic, xd);  in do_jffs2_setxattr()
1190 		unrefer_xattr_datum(c, xd);  in do_jffs2_setxattr()
1192 		delete_xattr_ref(c, ref);  in do_jffs2_setxattr()
1195 	up_write(&c->xattr_sem);  in do_jffs2_setxattr()
1196 	jffs2_complete_reservation(c);  in do_jffs2_setxattr()
1212 int jffs2_garbage_collect_xattr_datum(struct jffs2_sb_info *c, struct jffs2_xattr_datum *xd,  in jffs2_garbage_collect_xattr_datum()  argument
1218 	down_write(&c->xattr_sem);  in jffs2_garbage_collect_xattr_datum()
1224 	rc = load_xattr_datum(c, xd);  in jffs2_garbage_collect_xattr_datum()
1232 	rc = jffs2_reserve_space_gc(c, totlen, &length, JFFS2_SUMMARY_XATTR_SIZE);  in jffs2_garbage_collect_xattr_datum()
1237 	rc = save_xattr_datum(c, xd);  in jffs2_garbage_collect_xattr_datum()
1243 		jffs2_mark_node_obsolete(c, raw);  in jffs2_garbage_collect_xattr_datum()
1244 	up_write(&c->xattr_sem);  in jffs2_garbage_collect_xattr_datum()
1248 int jffs2_garbage_collect_xattr_ref(struct jffs2_sb_info *c, struct jffs2_xattr_ref *ref,  in jffs2_garbage_collect_xattr_ref()  argument
1254 	down_write(&c->xattr_sem);  in jffs2_garbage_collect_xattr_ref()
1263 	totlen = ref_totlen(c, c->gcblock, ref->node);  in jffs2_garbage_collect_xattr_ref()
1265 	rc = jffs2_reserve_space_gc(c, totlen, &length, JFFS2_SUMMARY_XREF_SIZE);  in jffs2_garbage_collect_xattr_ref()
1271 	rc = save_xattr_ref(c, ref);  in jffs2_garbage_collect_xattr_ref()
1277 		jffs2_mark_node_obsolete(c, raw);  in jffs2_garbage_collect_xattr_ref()
1278 	up_write(&c->xattr_sem);  in jffs2_garbage_collect_xattr_ref()
1282 int jffs2_verify_xattr(struct jffs2_sb_info *c)  in jffs2_verify_xattr()  argument
1290 	down_write(&c->xattr_sem);  in jffs2_verify_xattr()
1291 	list_for_each_entry_safe(xd, _xd, &c->xattr_unchecked, xindex) {  in jffs2_verify_xattr()
1292 		rc = do_verify_xattr_datum(c, xd);  in jffs2_verify_xattr()
1296 		spin_lock(&c->erase_completion_lock);  in jffs2_verify_xattr()
1300 			jeb = &c->blocks[ref_offset(raw) / c->sector_size];  in jffs2_verify_xattr()
1301 			totlen = PAD(ref_totlen(c, jeb, raw));  in jffs2_verify_xattr()
1302 			c->unchecked_size -= totlen; c->used_size += totlen;  in jffs2_verify_xattr()
1308 			list_add(&xd->xindex, &c->xattr_dead_list);  in jffs2_verify_xattr()
1309 		spin_unlock(&c->erase_completion_lock);  in jffs2_verify_xattr()
1311 	up_write(&c->xattr_sem);  in jffs2_verify_xattr()
1312 	return list_empty(&c->xattr_unchecked) ? 1 : 0;  in jffs2_verify_xattr()
1315 void jffs2_release_xattr_datum(struct jffs2_sb_info *c, struct jffs2_xattr_datum *xd)  in jffs2_release_xattr_datum()  argument
1325 void jffs2_release_xattr_ref(struct jffs2_sb_info *c, struct jffs2_xattr_ref *ref)  in jffs2_release_xattr_ref()  argument
1333 	for (tmp=c->xref_dead_list, ptmp=&c->xref_dead_list; tmp; ptmp=&tmp->next, tmp=tmp->next) {  in jffs2_release_xattr_ref()