files: Pass stat information into fd_id_generate_special

Acked-by: Andrew Vagin <avagin@parallels.com>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>

cr-dump.c

@@ -255,7 +255,7 @@ static int dump_task_exe_link(pid_t pid, MmEntry *mm)
 		return -1;
 	}
 
-	mm->exe_file_id = fd_id_generate_special();
+	mm->exe_file_id = fd_id_generate_special(&params.stat);
 
 	ret = dump_one_reg_file(fd, mm->exe_file_id, &params);
 	close(fd);
@@ -281,7 +281,7 @@ static int dump_task_fs(pid_t pid, struct parasite_dump_misc *misc, struct cr_fd
 		return -1;
 	}
 
-	fe.cwd_id = fd_id_generate_special();
+	fe.cwd_id = fd_id_generate_special(&p.stat);
 
 	ret = dump_one_reg_file(fd, fe.cwd_id, &p);
 	if (ret < 0)
@@ -299,7 +299,7 @@ static int dump_task_fs(pid_t pid, struct parasite_dump_misc *misc, struct cr_fd
 		return -1;
 	}
 
-	fe.root_id = fd_id_generate_special();
+	fe.root_id = fd_id_generate_special(&p.stat);
 
 	ret = dump_one_reg_file(fd, fe.root_id, &p);
 	if (ret < 0)
@@ -356,7 +356,7 @@ static int dump_filemap(pid_t pid, struct vma_area *vma_area,
 		p.flags = O_RDWR;
 	else
 		p.flags = O_RDONLY;
-	vma->shmid = fd_id_generate_special();
+	vma->shmid = fd_id_generate_special(&p.stat);
 
 	return dump_one_reg_file(vma_area->vm_file_fd, vma->shmid, &p);
 }

file-ids.c

@@ -17,6 +17,7 @@
 #include "syscall.h"
 #include "image.h"
 #include "util.h"
+#include "irmap.h"
 
 static DECLARE_KCMP_TREE(fd_tree, KCMP_FILE);
 
@@ -25,7 +26,7 @@ void fd_id_show_tree(void)
 	kid_show_tree(&fd_tree);
 }
 
-u32 fd_id_generate_special(void)
+u32 fd_id_generate_special(struct stat *st)
 {
 	return fd_tree.subid++;
 }

files-reg.c

@@ -382,7 +382,7 @@ static int create_link_remap(char *path, int len, int lfd, u32 *idp)
 		tmp--;
 	}
 
-	rfe.id = *idp	= fd_id_generate_special();
+	rfe.id = *idp	= fd_id_generate_special(NULL);
 	rfe.flags	= 0;
 	rfe.pos		= 0;
 	rfe.fown	= &fwn;

include/file-ids.h

@@ -11,8 +11,10 @@
 #define FD_DESC_INVALID		(-3U)
 
 struct fdinfo_entry;
+struct stat;
+
 extern int fd_id_generate(pid_t pid, FdinfoEntry *fe);
-extern u32 fd_id_generate_special(void);
+extern u32 fd_id_generate_special(struct stat *);
 extern void fd_id_show_tree(void);
 
 #endif /* __CR_FILE_IDS_H__ */

sk-unix.c

@@ -581,7 +581,7 @@ int fix_external_unix_sockets(void)
 
 		BUG_ON(sk->sd.already_dumped);
 
-		e.id		= fd_id_generate_special();
+		e.id		= fd_id_generate_special(NULL);
 		e.ino		= sk->sd.ino;
 		e.type		= SOCK_DGRAM;
 		e.state		= TCP_LISTEN;