collect: Shorten common images collecting code

Now we have a set of cinfo-s, it's possible to collect all
this stuff in a plan for-loop.
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

cr-restore.c

@@ -110,9 +110,30 @@ static int crtools_prepare_shared(void)
 	return 0;
 }
 
+static struct collect_image_info *cinfos[] = {
+	&reg_file_cinfo,
+	&remap_cinfo,
+	&nsfile_cinfo,
+	&pipe_cinfo,
+	&fifo_cinfo,
+	&unix_sk_cinfo,
+	&packet_sk_cinfo,
+	&netlink_sk_cinfo,
+	&eventfd_cinfo,
+	&epoll_tfd_cinfo,
+	&epoll_cinfo,
+	&signalfd_cinfo,
+	&inotify_cinfo,
+	&inotify_mark_cinfo,
+	&fanotify_cinfo,
+	&fanotify_mark_cinfo,
+	&tty_info_cinfo,
+	&tty_cinfo,
+};
+
 static int root_prepare_shared(void)
 {
-	int ret = 0;
+	int ret = 0, i;
 	struct pstree_item *pi;
 
 	pr_info("Preparing info about shared resources\n");
@@ -126,40 +147,20 @@ static int root_prepare_shared(void)
 	if (prepare_shared_reg_files())
 		return -1;
 
-	if (collect_reg_files())
-		return -1;
-
-	if (collect_ns_files())
-		return -1;
+	for (i = 0; i < ARRAY_SIZE(cinfos); i++) {
+		ret = collect_image(cinfos[i]);
+		if (ret)
+			return -1;
+	}
 
 	if (collect_pipes())
 		return -1;
-
 	if (collect_fifo())
 		return -1;
-
 	if (collect_unix_sockets())
 		return -1;
 
-	if (collect_packet_sockets())
-		return -1;
-
-	if (collect_netlink_sockets())
-		return -1;
-
-	if (collect_eventfd())
-		return -1;
-
-	if (collect_eventpoll())
-		return -1;
-
-	if (collect_signalfd())
-		return -1;
-
-	if (collect_inotify())
-		return -1;
-
-	if (collect_tty())
+	if (tty_verify_active_pairs())
 		return -1;
 
 	for_each_pstree_item(pi) {

eventfd.c

@@ -132,8 +132,3 @@ struct collect_image_info eventfd_cinfo = {
 	.priv_size = sizeof(struct eventfd_file_info),
 	.collect = collect_one_efd,
 };
-
-int collect_eventfd(void)
-{
-	return collect_image(&eventfd_cinfo);
-}

eventpoll.c

@@ -198,14 +198,3 @@ struct collect_image_info epoll_cinfo = {
 	.priv_size = sizeof(struct eventpoll_file_info),
 	.collect = collect_one_epoll,
 };
-
-int collect_eventpoll(void)
-{
-	int ret;
-
-	ret = collect_image(&epoll_tfd_cinfo);
-	if (!ret)
-		ret = collect_image(&epoll_cinfo);
-
-	return ret;
-}

fifo.c

@@ -151,11 +151,5 @@ struct collect_image_info fifo_cinfo = {
 
 int collect_fifo(void)
 {
-	int ret;
-
-	ret = collect_image(&fifo_cinfo);
-	if (!ret)
-		ret = collect_pipe_data(CR_FD_FIFO_DATA, pd_hash_fifo);
-
-	return ret;
+	return collect_pipe_data(CR_FD_FIFO_DATA, pd_hash_fifo);
 }

files-reg.c

@@ -581,14 +581,3 @@ int prepare_shared_reg_files(void)
 	mutex_init(ghost_file_mutex);
 	return 0;
 }
-
-int collect_reg_files(void)
-{
-	int ret;
-
-	ret = collect_image(&reg_file_cinfo);
-	if (!ret)
-		ret = collect_image(&remap_cinfo);
-
-	return ret;
-}

fsnotify.c

@@ -523,18 +523,3 @@ struct collect_image_info fanotify_mark_cinfo = {
 	.collect = collect_one_fanotify_mark,
 	.flags = COLLECT_OPTIONAL,
 };
-
-int collect_inotify(void)
-{
-	int ret;
-
-	ret = collect_image(&inotify_cinfo);
-	if (!ret)
-		ret = collect_image(&inotify_mark_cinfo);
-	if (!ret)
-		ret = collect_image(&fanotify_cinfo);
-	if (!ret)
-		ret = collect_image(&fanotify_mark_cinfo);
-
-	return ret;
-}

include/eventfd.h

@@ -11,7 +11,7 @@
 
 extern int is_eventfd_link(int lfd);
 extern const struct fdtype_ops eventfd_dump_ops;
-extern int collect_eventfd(void);
+extern struct collect_image_info eventfd_cinfo;
 extern void show_eventfds(int fd);
 
 #endif /* __CR_EVENTFD_H__ */

include/eventpoll.h

@@ -11,7 +11,8 @@
 
 extern int is_eventpoll_link(int lfd);
 extern const struct fdtype_ops eventpoll_dump_ops;
-extern int collect_eventpoll(void);
+extern struct collect_image_info epoll_tfd_cinfo;
+extern struct collect_image_info epoll_cinfo;
 extern void show_eventpoll(int fd);
 extern void show_eventpoll_tfd(int fd);
 

include/fifo.h

@@ -5,6 +5,7 @@ struct fd_parms;
 struct cr_fdset;
 
 extern const struct fdtype_ops fifo_dump_ops;
+extern struct collect_image_info fifo_cinfo;
 extern int collect_fifo(void);
 
 #endif /* __CR_FIFO_H__ */

include/files-reg.h

@@ -26,7 +26,6 @@ struct reg_file_info {
 extern int open_reg_by_id(u32 id);
 extern int open_path_by_id(u32 id, int (*open_cb)(struct reg_file_info *, void *), void *arg);
 extern void clear_ghost_files(void);
-extern int collect_reg_files(void);
 
 extern int prepare_shared_reg_files(void);
 
@@ -36,4 +35,7 @@ extern int dump_one_reg_file(int lfd, u32 id, const struct fd_parms *p);
 extern struct file_remap *lookup_ghost_remap(u32 dev, u32 ino);
 extern void remap_put(struct file_remap *remap);
 
+extern struct collect_image_info reg_file_cinfo;
+extern struct collect_image_info remap_cinfo;
+
 #endif /* __CR_FILES_REG_H__ */

include/fsnotify.h

@@ -19,7 +19,10 @@ extern int is_inotify_link(int lfd);
 extern int is_fanotify_link(int lfd);
 extern const struct fdtype_ops inotify_dump_ops;
 extern const struct fdtype_ops fanotify_dump_ops;
-extern int collect_inotify(void);
+extern struct collect_image_info inotify_cinfo;
+extern struct collect_image_info inotify_mark_cinfo;
+extern struct collect_image_info fanotify_cinfo;
+extern struct collect_image_info fanotify_mark_cinfo;
 extern void show_inotify_wd(int fd);
 extern void show_inotify(int fd);
 extern void show_fanotify_mark(int fd);

include/namespaces.h

@@ -25,7 +25,7 @@ extern struct ns_desc user_ns_desc;
 extern unsigned long current_ns_mask;
 
 extern const struct fdtype_ops nsfile_dump_ops;
-extern int collect_ns_files(void);
+extern struct collect_image_info nsfile_cinfo;
 
 int dump_namespaces(struct pid *pid, unsigned int ns_flags);
 int prepare_namespace(int pid, unsigned long clone_flags);

include/pipes.h

@@ -3,6 +3,7 @@
 
 #include "protobuf/pipe-data.pb-c.h"
 
+extern struct collect_image_info pipe_cinfo;
 extern int collect_pipes(void);
 extern void mark_pipe_master(void);
 extern const struct fdtype_ops pipe_dump_ops;

include/signalfd.h

@@ -6,6 +6,6 @@ struct fd_parms;
 extern int is_signalfd_link(int lfd);
 extern const struct fdtype_ops signalfd_dump_ops;
 extern void show_signalfd(int fd);
-extern int collect_signalfd(void);
+extern struct collect_image_info signalfd_cinfo;
 
 #endif /* __CR_SIGNALFD_H__ */

include/sk-packet.h

@@ -9,7 +9,7 @@ struct cr_fdset;
 struct fd_parms;
 struct vma_area;
 
-int collect_packet_sockets(void);
+extern struct collect_image_info packet_sk_cinfo;
 void show_packetsk(int fd);
 
 int dump_socket_map(struct vma_area *vma);

include/sockets.h

@@ -36,11 +36,12 @@ extern bool socket_test_collect_bit(unsigned int family, unsigned int proto);
 extern int sk_collect_one(int ino, int family, struct socket_desc *d);
 extern int collect_sockets(int pid);
 extern int collect_inet_sockets(void);
+extern struct collect_image_info unix_sk_cinfo;
 extern int collect_unix_sockets(void);
 extern int fix_external_unix_sockets(void);
 extern int resolve_unix_peers(void);
 
-extern int collect_netlink_sockets(void);
+extern struct collect_image_info netlink_sk_cinfo;
 
 extern void show_unixsk(int fd);
 extern void show_inetsk(int fd);

include/tty.h

@@ -15,7 +15,8 @@
 
 extern const struct fdtype_ops tty_dump_ops;
 extern int dump_verify_tty_sids(void);
-extern int collect_tty(void);
+extern struct collect_image_info tty_info_cinfo;
+extern struct collect_image_info tty_cinfo;
 extern int prepare_shared_tty(void);
 extern int tty_setup_slavery(void);
 

namespaces.c

@@ -305,11 +305,6 @@ struct collect_image_info nsfile_cinfo = {
 	.flags = COLLECT_OPTIONAL,
 };
 
-int collect_ns_files(void)
-{
-	return collect_image(&nsfile_cinfo);
-}
-
 int dump_task_ns_ids(struct pstree_item *item)
 {
 	int pid = item->pid.real;

pipes.c

@@ -398,13 +398,7 @@ struct collect_image_info pipe_cinfo = {
 
 int collect_pipes(void)
 {
-	int ret;
-
-	ret = collect_image(&pipe_cinfo);
-	if (!ret)
-		ret = collect_pipe_data(CR_FD_PIPES_DATA, pd_hash_pipes);
-
-	return ret;
+	return collect_pipe_data(CR_FD_PIPES_DATA, pd_hash_pipes);
 }
 
 int dump_one_pipe_data(struct pipe_data_dump *pd, int lfd, const struct fd_parms *p)

signalfd.c

@@ -127,8 +127,3 @@ struct collect_image_info signalfd_cinfo = {
 	.collect = collect_one_sigfd,
 	.flags = COLLECT_OPTIONAL,
 };
-
-int collect_signalfd(void)
-{
-	return collect_image(&signalfd_cinfo);
-}

sk-netlink.c

@@ -241,8 +241,3 @@ struct collect_image_info netlink_sk_cinfo = {
 	.collect = collect_one_netlink_sk,
 	.flags = COLLECT_OPTIONAL,
 };
-
-int collect_netlink_sockets(void)
-{
-	return collect_image(&netlink_sk_cinfo);
-}

sk-packet.c

@@ -506,8 +506,3 @@ struct collect_image_info packet_sk_cinfo = {
 	.collect = collect_one_packet_sk,
 	.flags = COLLECT_OPTIONAL,
 };
-
-int collect_packet_sockets(void)
-{
-	return collect_image(&packet_sk_cinfo);
-}

sk-unix.c

@@ -836,15 +836,7 @@ struct collect_image_info unix_sk_cinfo = {
 
 int collect_unix_sockets(void)
 {
-	int ret;
-
-	pr_info("Reading unix sockets in\n");
-
-	ret = collect_image(&unix_sk_cinfo);
-	if (!ret)
-		ret = read_sk_queues();
-
-	return ret;
+	return read_sk_queues();
 }
 
 int resolve_unix_peers(void)

tty.c

@@ -991,19 +991,6 @@ struct collect_image_info tty_cinfo = {
 	.flags = COLLECT_OPTIONAL,
 };
 
-int collect_tty(void)
-{
-	int ret;
-
-	ret = collect_image(&tty_info_cinfo);
-	if (!ret)
-		ret = collect_image(&tty_cinfo);
-	if (!ret)
-		ret = tty_verify_active_pairs();
-
-	return ret;
-}
-
 /* Make sure the ttys we're dumping do belong our process tree */
 int dump_verify_tty_sids(void)
 {