Add VFS, start of initrd
diff --git a/src/kernel/Makefile b/src/kernel/Makefile
index 4137f84..3cb20f8 100644
--- a/src/kernel/Makefile
+++ b/src/kernel/Makefile
@@ -13,15 +13,17 @@
switch_table.o \
scan_codes.o \
kheap.o \
- alloc.o
+ alloc.o \
+ vfs.o
+
+JAYROOT = ../../
CFLAGS = -nostdlib -nostdinc -fno-builtin -fno-stack-protector -ffreestanding \
- -m32 -O2 -g -Wall -Wno-unused-function -Wno-unused-variable
+ -m32 -O2 -g -Wall -Wno-unused-function -Wno-unused-variable \
+ -I$(JAYROOT)/include
LDFLAGS = -Tlink.ld -melf_i386
ASMFLAGS = -felf
QEMUFLAGS = -d cpu_reset
-JAYROOT = ../../
-
kernel.elf: $(SOURCES)
ld $(LDFLAGS) -o $@ $^
diff --git a/src/kernel/alloc.c b/src/kernel/alloc.c
index bcd58ae..c6e092c 100644
--- a/src/kernel/alloc.c
+++ b/src/kernel/alloc.c
@@ -254,6 +254,8 @@
base->size = full_size;
base->magic = HEAP_MAGIC;
base->allocated = true;
+
+ return mem;
}
else
{
diff --git a/src/kernel/vfs.c b/src/kernel/vfs.c
new file mode 100644
index 0000000..59ccaf5
--- /dev/null
+++ b/src/kernel/vfs.c
@@ -0,0 +1,49 @@
+#include "vfs.h"
+
+uint fs_read(struct fs_node *node, size_t offset, size_t size, uchar *buffer)
+{
+ if (!node || !node->vtable || !node->vtable->read)
+ return 0;
+
+ return node->vtable->read(node, offset, size, buffer);
+}
+
+uint fs_write(struct fs_node *node, size_t offset, size_t size, uchar *buffer)
+{
+ if (!node || !node->vtable || !node->vtable->write)
+ return 0;
+
+ return node->vtable->write(node, offset, size, buffer);
+}
+
+void fs_open(struct fs_node *node)
+{
+ if (!node || !node->vtable || !node->vtable->open)
+ return;
+
+ node->vtable->open(node);
+}
+
+void fs_close(struct fs_node *node)
+{
+ if (!node || !node->vtable || !node->vtable->close)
+ return;
+
+ node->vtable->close(node);
+}
+
+struct fs_dirent *fs_readdir(struct fs_node *node, uint index)
+{
+ if (!node || !node->vtable || !node->vtable->readdir || (node->flags & 7) != FS_DIRECTORY)
+ return NULL;
+
+ return node->vtable->readdir(node, index);
+}
+
+struct fs_node *fs_finddir(struct fs_node *node, char *name)
+{
+ if (!node || !node->vtable || !node->vtable->finddir || (node->flags & 7) != FS_DIRECTORY)
+ return NULL;
+
+ return node->vtable->finddir(node, name);
+}
diff --git a/src/kernel/vfs.h b/src/kernel/vfs.h
new file mode 100644
index 0000000..1c62a80
--- /dev/null
+++ b/src/kernel/vfs.h
@@ -0,0 +1,68 @@
+#pragma once
+
+#include "kint.h"
+
+struct fs_vtable;
+
+struct fs_node
+{
+ char name[128]; /* file name */
+ uint inode; /* identifier */
+ uint flags; /* type of node */
+ uint mask; /* permissions */
+ uint gid; /* group id */
+ uint uid; /* user id */
+ size_t size; /* size in bytes */
+ uint dri_res; /* reserved for driver */
+
+ struct fs_vtable *vtable;
+
+ struct fs_node *mount; /* used for mounts */
+};
+
+struct fs_dirent
+{
+ char name[128];
+ uint inode;
+};
+
+typedef uint (* fs_read_t)(struct fs_node *node, size_t offset, size_t size, uchar *buffer);
+typedef uint (* fs_write_t)(struct fs_node *node, size_t offset, size_t size, uchar *buffer);
+typedef void (* fs_open_t)(struct fs_node *node);
+typedef void (* fs_close_t)(struct fs_node *node);
+
+typedef struct fs_dirent *(* fs_readdir_t)(struct fs_node *node, uint index);
+typedef struct fs_node *(* fs_finddir_t)(struct fs_node *node, char *name);
+
+struct fs_vtable
+{
+ fs_read_t read;
+ fs_write_t write;
+ fs_open_t open;
+ fs_close_t close;
+ fs_readdir_t readdir;
+ fs_finddir_t finddir;
+};
+
+enum fs_flags
+{
+ FS_FILE = 1,
+ FS_DIRECTORY,
+ FS_CHARDEVICE,
+ FS_BLOCKDEVICE,
+ FS_PIPE,
+ FS_SYMLINK,
+
+ FS_MOUNT = 8, /* Can be or'd with others */
+};
+
+/* Not to be confused normal open, close, etc functions, these operate
+ * on the VFS directly */
+
+uint fs_read(struct fs_node *node, size_t offset, size_t size, uchar *buffer);
+uint fs_write(struct fs_node *node, size_t offset, size_t size, uchar *buffer);
+void fs_open(struct fs_node *node);
+void fs_close(struct fs_node *node);
+
+struct fs_dirent *fs_readdir(struct fs_node *node, uint index);
+struct fs_node *fs_finddir(struct fs_node *node, char *name);