add tmpfs writing, vfs node tree dumping and fix some stupid issues

Makefile

@@ -28,7 +28,7 @@ $(KERNEL): srcdir $(KERNELSRCDEPS) kernel.ld
 	mkdir -p $(ISO)
 	$(CC) $(LDFLAGS) -o $@ $(call rwildcard,bin,*.o)
 
-$(INITRD): $(call rwildcard,initrd,*)
+$(INITRD): initrd
 	cd initrd;tar -cf $(INITRD) *
 
 sysdisk.iso: $(ISO) $(INITRD)

src/fs/initrd.c

@@ -165,9 +165,13 @@ void initrd_parse(){
 		if(entry.type != TAR_FILE) continue;
 		
 		vnode_t *node;
+		int error;
 		vfs_open(&node, vfs_root(), entry.name);
-		vfs_write(&node, datastart, entry.size, 0);
-		vfs_close(&node);
+		if(vfs_write(&error, node, datastart, entry.size, 0) == -1){
+			printf("WRITE ERROR %lu\n", error);
+			_panic("Failed to write from initrd", 0);
+}
+		vfs_close(node);
 	
 	}
 	

src/fs/tmpfs.c

@@ -2,6 +2,8 @@
 #include <kernel/vfs.h>
 #include <kernel/alloc.h>
 #include <arch/mmu.h>
+#include <kernel/pmm.h>
+#include <string.h>
 
 static int tmpfs_mount(dirnode_t* mountpoint, vnode_t* device, int mountflags, void* fsinfo){
 	
@@ -23,6 +25,34 @@ static int tmpfs_mount(dirnode_t* mountpoint, vnode_t* device, int mountflags, v
 	return 0;
 }
 
+static int tmpfs_write(int* error, vnode_t* node, void* buff, size_t count, size_t offset){
+	
+	// TODO use virtual memory
+
+	size_t targetpage = (count + offset) / PAGE_SIZE;
+
+	if(node->st.st_blocks <= targetpage){
+		void* new = pmm_hhdmalloc(targetpage+1);
+		if(!new){
+			*error = ENOMEM;
+			return -1;
+		};
+		memcpy(new, node->fsdata, node->st.st_size);
+		pmm_free(node->fsdata, node->st.st_size / PAGE_SIZE + 1);
+		node->fsdata = new;
+		node->st.st_blocks = targetpage+1;
+		node->st.st_size = count + offset;
+	}
+
+	memcpy(node->fsdata + offset, buff, count);
+
+	if(offset + count > node->st.st_size)
+		node->st.st_size = offset + count;
+
+	*error = 0;
+	return count;
+}
+
 static int tmpfs_unmount(fs_t* fs) UNIMPLEMENTED
 static int tmpfs_open(dirnode_t* parent, char* name) UNIMPLEMENTED
 static int tmpfs_close(vnode_t* node) UNIMPLEMENTED
@@ -49,27 +79,38 @@ static int tmpfs_mkdir(dirnode_t* parent, char* name, mode_t mode){
 }
 
 static int tmpfs_create(dirnode_t* parent, char* name, mode_t mode){
-	
-	vnode_t* node = vfs_newnode(name, parent->vnode.fs, NULL);
-	
-	if(!node)
+		
+	// TODO use virtual memory
+	void* firstpage = pmm_hhdmalloc(1);
+
+	if(!firstpage)
 		return ENOMEM;
+
+	vnode_t* node = vfs_newnode(name, parent->vnode.fs, NULL);
+
+	if(!node){
+		pmm_free(firstpage, 1);
+		return ENOMEM;
+	}
 	
 	if(!hashtable_insert(&parent->children, name, node)){
+		pmm_free(firstpage, 1);
 		vfs_destroynode(node);
 		return ENOMEM;
 	}
 	
 	node->parent = parent;
+	node->fsdata = firstpage;
 	stat* st = &node->st;
-	st->st_mode = MAKETYPE(TYPE_DIR) | GETMODE(mode);
 	st->st_blksize = PAGE_SIZE;
+	st->st_blocks = 1;
+	
 
 	return 0;
 }
 
 static fscalls_t funcs = {
-	tmpfs_mount, tmpfs_unmount, tmpfs_open, tmpfs_close, tmpfs_mkdir, tmpfs_create
+	tmpfs_mount, tmpfs_unmount, tmpfs_open, tmpfs_close, tmpfs_mkdir, tmpfs_create, tmpfs_write
 };
 
 

src/fs/vfs.c

@@ -14,21 +14,61 @@ static inline dirnode_t* mountpoint(dirnode_t* node){
 	return ret;
 }
 
-int vfs_write(vnode_t* node, void* buff, size_t count, size_t offset){
+void vfs_debugdumptree(dirnode_t* node, size_t depth, size_t maxdepth){
 	
-	int type = GETTYPE(node->st.st_mode);
+	if(depth > maxdepth)
+		return;
+	
+	printf("Directory node: %s Children: ", node->vnode.name);
 
+	// print all children first
+	
+	node = mountpoint(node);
+
+	for(size_t i = 0; i < node->children.size; ++i){
+		hashtableentry* entry = &node->children.entries[i];
+
+		while(entry && entry->key){
+			printf("%s ", entry->key);
+			entry = entry->next;
+		}
+		
+	}
+	// now recurse into directories
+	
+	printf("\n");
+
+	for(size_t i = 0; i < node->children.size; ++i){
+		hashtableentry* entry = &node->children.entries[i];
+		
+		while(entry && entry->val){
+			vnode_t* chnode = entry->val;
+			
+			if(GETTYPE(chnode->st.st_mode) == TYPE_DIR)
+				vfs_debugdumptree((dirnode_t*)chnode, depth + 1, maxdepth);
+			entry = entry->next;
+		}
+
+		
+	}
+
+
+}
+
+int vfs_write(int* error, vnode_t* node, void* buff, size_t count, size_t offset){
+
+
+	int type = GETTYPE(node->st.st_mode);
+	
 	if(type == TYPE_DIR || type == TYPE_LINK)
 		return EINVAL;
 	
 	if(type == TYPE_BLOCKDEV || type == TYPE_CHARDEV)
 		return ENOSYS; // TODO change this when the device manager is implemented :)
-	
-	
-	int status = node->fs->calls->write(node, buff, count, offset);
-	
-	
-	return 0;
+
+	int writecount = node->fs->calls->write(error, node, buff, count, offset);
+
+	return writecount;
 	
 }
 

src/include/kernel/vfs.h

@@ -53,7 +53,7 @@ typedef struct _fscalls_t {
 	//	 args: parent, name, mode
 	int	 (*create)(dirnode_t* parent, char* name, mode_t mode);
 	//	 write to a file
-	int	 (*write)(vnode_t* node, void* buff, size_t count, size_t offset);
+	int	 (*write)(int* error, vnode_t* node, void* buff, size_t count, size_t offset);
 } fscalls_t;
 
 
@@ -63,7 +63,7 @@ int vfs_open(vnode_t** buf, dirnode_t* ref, char* path);
 int vfs_close(vnode_t* node);
 int vfs_mkdir(dirnode_t* ref, char* path, mode_t mode);
 int vfs_create(dirnode_t* ref, char* path, mode_t mode);
-int vfs_write(vnode_t* node, void* buff, size_t count, size_t offset);
+int vfs_write(int* error, vnode_t* node, void* buff, size_t count, size_t offset);
 
 void vfs_init();
 dirnode_t* vfs_root();