fsnotify: Kill fsnotify lists

The lists are only needed to collect marks (deprecated) into
notify objects. The latter ones are stored in fdsec hash, so
for this legacy case we can find them there.

✓ travis-ci: success for Sanitize fsnotify legacy code
Signed-off-by: Pavel Emelyanov <xemul@virtuozzo.com>

criu/fsnotify.c

@@ -61,7 +61,6 @@ struct fsnotify_mark_info {
 };
 
 struct fsnotify_file_info {
-	struct list_head		list;
 	union {
 		InotifyFileEntry	*ife;
 		FanotifyFileEntry	*ffe;
@@ -77,9 +76,6 @@ typedef struct {
 	u64 __handle[16];
 } fh_t;
 
-static LIST_HEAD(inotify_info_head);
-static LIST_HEAD(fanotify_info_head);
-
 /* Checks if file descriptor @lfd is inotify */
 int is_inotify_link(char *link)
 {
@@ -760,31 +756,6 @@ static struct file_desc_ops fanotify_desc_ops = {
 	.open = open_fanotify_fd,
 };
 
-static struct fsnotify_file_info *find_inotify_info(unsigned id)
-{
-	struct fsnotify_file_info *p;
-	static struct fsnotify_file_info *last = NULL;
-
-	if (last && last->ife->id == id) {
-		/*
-		 * An optimization for clean dump image -- criu puts
-		 * wd-s for one inotify in one row, thus sometimes
-		 * we can avoid scanning the inotify_info_head.
-		 */
-		pr_debug("\t\tlast ify for %#08x found\n", id);
-		return last;
-	}
-
-	list_for_each_entry(p, &inotify_info_head, list)
-		if (p->ife->id == id) {
-			last = p;
-			return p;
-		}
-
-	pr_err("Can't find inotify with id %#08x\n", id);
-	return NULL;
-}
-
 static int __collect_inotify_mark(struct fsnotify_file_info *p, struct fsnotify_mark_info *mark)
 {
 	struct fsnotify_mark_info *m;
@@ -804,13 +775,14 @@ static int __collect_inotify_mark(struct fsnotify_file_info *p, struct fsnotify_
 
 static int collect_inotify_mark(struct fsnotify_mark_info *mark)
 {
-	struct fsnotify_file_info *p;
+	struct file_desc *d;
 
-	p = find_inotify_info(mark->iwe->id);
-	if (!p)
-		return -1;
+	d = find_file_desc_raw(FD_TYPES__INOTIFY, mark->iwe->id);
+	if (d)
+		return __collect_inotify_mark(container_of(d, struct fsnotify_file_info, d), mark);
 
-	return __collect_inotify_mark(p, mark);
+	pr_err("Can't find inotify with id %#08x\n", mark->iwe->id);
+	return -1;
 }
 
 static int __collect_fanotify_mark(struct fsnotify_file_info *p,
@@ -825,12 +797,11 @@ static int __collect_fanotify_mark(struct fsnotify_file_info *p,
 
 static int collect_fanotify_mark(struct fsnotify_mark_info *mark)
 {
-	struct fsnotify_file_info *p;
+	struct file_desc *d;
 
-	list_for_each_entry(p, &fanotify_info_head, list) {
-		if (p->ffe->id == mark->fme->id)
-			return __collect_fanotify_mark(p, mark);
-	}
+	d = find_file_desc_raw(FD_TYPES__FANOTIFY, mark->fme->id);
+	if (d)
+		return __collect_fanotify_mark(container_of(d, struct fsnotify_file_info, d), mark);
 
 	pr_err("Can't find fanotify with id %#08x\n", mark->fme->id);
 	return -1;
@@ -843,7 +814,6 @@ static int collect_one_inotify(void *o, ProtobufCMessage *msg, struct cr_img *im
 
 	info->ife = pb_msg(msg, InotifyFileEntry);
 	INIT_LIST_HEAD(&info->marks);
-	list_add(&info->list, &inotify_info_head);
 	pr_info("Collected id %#08x flags %#08x\n", info->ife->id, info->ife->flags);
 
 	for (i = 0; i < info->ife->n_wd; i++) {
@@ -878,7 +848,6 @@ static int collect_one_fanotify(void *o, ProtobufCMessage *msg, struct cr_img *i
 
 	info->ffe = pb_msg(msg, FanotifyFileEntry);
 	INIT_LIST_HEAD(&info->marks);
-	list_add(&info->list, &fanotify_info_head);
 	pr_info("Collected id %#08x flags %#08x\n", info->ffe->id, info->ffe->flags);
 
 	for (i = 0; i < info->ffe->n_mark; i++) {