Add factory inode support.

kernel/fs/user.cpp

@@ -214,6 +214,8 @@ public:
 	                            size_t size, off_t start);
 	virtual Ref<Inode> open(ioctx_t* ctx, const char* filename, int flags,
 	                        mode_t mode);
+	virtual Ref<Inode> factory(ioctx_t* ctx, const char* filename, int flags,
+	                           mode_t mode);
 	virtual int mkdir(ioctx_t* ctx, const char* filename, mode_t mode);
 	virtual int link(ioctx_t* ctx, const char* filename, Ref<Inode> node);
 	virtual int link_raw(ioctx_t* ctx, const char* filename, Ref<Inode> node);
@@ -1065,6 +1067,12 @@ Ref<Inode> Unode::open(ioctx_t* ctx, const char* filename, int flags,
 	return ret;
 }
 
+Ref<Inode> Unode::factory(ioctx_t* /*ctx*/, const char* /*filename*/,
+                          int /*flags*/, mode_t /*mode*/)
+{
+	return errno = EBADF, Ref<Inode>(NULL);
+}
+
 int Unode::mkdir(ioctx_t* ctx, const char* filename, mode_t mode)
 {
 	Channel* channel = server->Connect(ctx);

kernel/include/sortix/fcntl.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2012, 2013, 2014 Jonas 'Sortie' Termansen.
+ * Copyright (c) 2012, 2013, 2014, 2016 Jonas 'Sortie' Termansen.
  *
  * Permission to use, copy, modify, and distribute this software for any
  * purpose with or without fee is hereby granted, provided that the above
@@ -44,6 +44,9 @@ extern "C" {
 #define O_SYMLINK_NOFOLLOW (1<<13)
 #define O_NOCTTY (1<<14)
 #define O_TTY_INIT (1<<15)
+#ifdef __is_sortix_kernel
+#define O_IS_STAT (1<<30)
+#endif
 
 #define O_ACCMODE (O_READ | O_WRITE | O_EXEC | O_SEARCH)
 

kernel/include/sortix/kernel/inode.h

@@ -73,6 +73,8 @@ public:
 	                            size_t size, off_t start) = 0;
 	virtual Ref<Inode> open(ioctx_t* ctx, const char* filename, int flags,
 	                        mode_t mode) = 0;
+	virtual Ref<Inode> factory(ioctx_t* ctx, const char* filename, int flags,
+	                           mode_t mode) = 0;
 	virtual int mkdir(ioctx_t* ctx, const char* filename, mode_t mode) = 0;
 	virtual int link(ioctx_t* ctx, const char* filename, Ref<Inode> node) = 0;
 	virtual int link_raw(ioctx_t* ctx, const char* filename, Ref<Inode> node) = 0;
@@ -166,6 +168,8 @@ public:
 	                            size_t size, off_t start);
 	virtual Ref<Inode> open(ioctx_t* ctx, const char* filename, int flags,
 	                        mode_t mode);
+	virtual Ref<Inode> factory(ioctx_t* ctx, const char* filename, int flags,
+	                           mode_t mode);
 	virtual int mkdir(ioctx_t* ctx, const char* filename, mode_t mode);
 	virtual int link(ioctx_t* ctx, const char* filename, Ref<Inode> node);
 	virtual int link_raw(ioctx_t* ctx, const char* filename, Ref<Inode> node);

kernel/include/sortix/stat.h

@@ -84,6 +84,11 @@ struct stat
 #define S_ISCHR(mode) (((mode) & S_IFMT) == S_IFCHR)
 #define S_ISFIFO(mode) (((mode) & S_IFMT) == S_IFIFO)
 
+#ifdef __is_sortix_kernel
+#define S_IFFACTORY 0x10000
+#define S_IFFACTORY_NOSTAT 0x20000
+#endif
+
 #define UTIME_NOW  0x3FFFFFFF
 #define UTIME_OMIT 0x3FFFFFFE
 

kernel/inode.cpp

@@ -217,6 +217,14 @@ Ref<Inode> AbstractInode::open(ioctx_t* /*ctx*/, const char* /*filename*/,
 	return errno = ENOTDIR, Ref<Inode>(NULL);
 }
 
+Ref<Inode> AbstractInode::factory(ioctx_t* /*ctx*/, const char* /*filename*/,
+                                  int /*flags*/, mode_t /*mode*/)
+{
+	if ( inode_type == INODE_TYPE_DIR )
+		return errno = EBADF, Ref<Inode>(NULL);
+	return errno = ENOTDIR, Ref<Inode>(NULL);
+}
+
 int AbstractInode::mkdir(ioctx_t* /*ctx*/, const char* /*filename*/,
                          mode_t /*mode*/)
 {

kernel/io.cpp

@@ -205,7 +205,8 @@ int sys_faccessat(int dirfd, const char* path, int mode, int flags)
 	ioctx_t ctx; SetupUserIOCtx(&ctx);
 	Ref<Descriptor> from = PrepareLookup(pathcopy, dirfd);
 	if ( !from ) { delete[] pathcopy; return -1; }
-	int open_flags = O_READ | (flags & AT_SYMLINK_NOFOLLOW ? O_SYMLINK_NOFOLLOW : 0);
+	int open_flags = O_READ | O_IS_STAT |
+	                 (flags & AT_SYMLINK_NOFOLLOW ? O_SYMLINK_NOFOLLOW : 0);
 	Ref<Descriptor> desc = from->open(&ctx, pathcopy, open_flags);
 	delete[] pathcopy;
 	if ( !desc )
@@ -290,7 +291,8 @@ int sys_fstatat(int dirfd, const char* path, struct stat* st, int flags)
 	ioctx_t ctx; SetupUserIOCtx(&ctx);
 	Ref<Descriptor> from = PrepareLookup(pathcopy, dirfd);
 	if ( !from ) { delete[] pathcopy; return -1; }
-	int open_flags = O_READ | (flags & AT_SYMLINK_NOFOLLOW ? O_SYMLINK_NOFOLLOW : 0);
+	int open_flags = O_READ | O_IS_STAT |
+	                 (flags & AT_SYMLINK_NOFOLLOW ? O_SYMLINK_NOFOLLOW : 0);
 	Ref<Descriptor> desc = from->open(&ctx, pathcopy, open_flags);
 	delete[] pathcopy;
 	if ( !desc )
@@ -326,7 +328,8 @@ int sys_fstatvfsat(int dirfd, const char* path, struct statvfs* stvfs, int flags
 	ioctx_t ctx; SetupUserIOCtx(&ctx);
 	Ref<Descriptor> from = PrepareLookup(pathcopy, dirfd);
 	if ( !from ) { delete[] pathcopy; return -1; }
-	int open_flags = O_READ | (flags & AT_SYMLINK_NOFOLLOW ? O_SYMLINK_NOFOLLOW : 0);
+	int open_flags = O_READ | O_IS_STAT |
+	                 (flags & AT_SYMLINK_NOFOLLOW ? O_SYMLINK_NOFOLLOW : 0);
 	Ref<Descriptor> desc = from->open(&ctx, pathcopy, open_flags);
 	delete[] pathcopy;
 	if ( !desc )

kernel/vnode.cpp

@@ -98,6 +98,13 @@ Ref<Vnode> Vnode::open(ioctx_t* ctx, const char* filename, int flags, mode_t mod
 	Ref<Inode> retinode = inode->open(ctx, filename, flags, mode);
 	if ( !retinode )
 		return Ref<Vnode>(NULL);
+	if ( retinode->type & S_IFFACTORY &&
+	     !(retinode->type & S_IFFACTORY_NOSTAT && flags & O_IS_STAT) )
+	{
+		retinode = retinode->factory(ctx, filename, flags, mode);
+		if ( !retinode )
+			return Ref<Vnode>(NULL);
+	}
 	Ref<Vnode> retmountedat = mountedat;
 	ino_t retrootino = rootino;
 	dev_t retrootdev = rootdev;