vfs: use mutexes for locking

kernel-src/fs/devfs.c

@@ -331,9 +331,7 @@ static vops_t vnops = {
 static void ctor(scache_t *cache, void *obj) {
 	devnode_t *node = obj;
 	memset(node, 0, sizeof(devnode_t));
-	node->vnode.refcount = 1;
+	VOP_INIT(&node->vnode, &vnops, 0, 0, NULL)
-	SPINLOCK_INIT(node->vnode.lock);
-	node->vnode.ops = &vnops;
 	node->attr.inode = ++currentinode;
 }
 

kernel-src/fs/ext2.c

@@ -2,6 +2,8 @@
 #include <kernel/alloc.h>
 #include <kernel/timekeeper.h>
 #include <kernel/slab.h>
+#include <kernel/vmm.h>
+#include <arch/cpu.h>
 #include <kernel/pmm.h>
 #include <hashtable.h>
 #include <mutex.h>

kernel-src/fs/pipefs.c

@@ -234,13 +234,10 @@ static vops_t vnops = {
 static void ctor(scache_t *cache, void *obj) {
 	pipenode_t *node = obj;
 	memset(node, 0, sizeof(pipenode_t));
-	node->vnode.refcount = 1;
+	VOP_INIT(&node->vnode, &vnops, 0, 0, NULL);
-	SPINLOCK_INIT(node->vnode.lock);
-	node->vnode.ops = &vnops;
 	node->attr.inode = ++currentinode;
 	EVENT_INIT(&node->writeevent);
 	EVENT_INIT(&node->readevent);
-	node->vnode.type = V_TYPE_FIFO;
 }
 
 void pipefs_init() {

kernel-src/fs/tmpfs.c

@@ -530,11 +530,7 @@ static tmpfsnode_t *newnode(vfs_t *vfs, int type) {
 
 	node->attr.type = type;
 	node->attr.inode = ++((tmpfs_t *)vfs)->inodenumber;
-	node->vnode.type = type;
+	VOP_INIT(&node->vnode, &vnops, 0, type, vfs);
-	node->vnode.refcount = 1;
-	SPINLOCK_INIT(node->vnode.lock);
-	node->vnode.ops = &vnops;
-	node->vnode.vfs = vfs;
 	return node;
 }
 

kernel-src/include/kernel/vfs.h

@@ -1,6 +1,7 @@
 #ifndef _VFS_H
 #define _VFS_H
 
+#include <mutex.h>
 #include <spinlock.h>
 #include <stddef.h>
 #include <stdint.h>
@@ -57,7 +58,7 @@ typedef struct vfs_t {
 
 typedef struct vnode_t {
 	struct vops_t *ops;
-	spinlock_t lock;
+	mutex_t lock;
 	int refcount;
 	int flags;
 	int type;
@@ -112,15 +113,15 @@ typedef struct vops_t {
 
 #define VOP_INIT(vn, o, f, t, v) \
 	(vn)->ops = o; \
-	SPINLOCK_INIT((vn)->lock); \
+	MUTEX_INIT(&(vn)->lock); \
 	(vn)->refcount = 1; \
 	(vn)->flags = f; \
 	(vn)->type = t; \
 	(vn)->vfs = v; \
 	(vn)->vfsmounted = NULL; 
 
-#define VOP_LOCK(v) spinlock_acquire(&(v)->lock)
+#define VOP_LOCK(v) MUTEX_ACQUIRE(&(v)->lock, false)
-#define VOP_UNLOCK(v) spinlock_release(&(v)->lock)
+#define VOP_UNLOCK(v) MUTEX_RELEASE(&(v)->lock)
 
 #define VOP_OPEN(v, f, c) (*v)->ops->open(v, f, c)
 #define VOP_CLOSE(v, f, c) (v)->ops->close(v, f, c)

kernel-src/include/kernel/vmm.h

@@ -2,7 +2,7 @@
 #define _VMM_H
 
 #include <arch/mmu.h>
-#include <spinlock.h>
+#include <mutex.h>
 #include <kernel/vfs.h>
 
 #define VMM_FLAGS_PAGESIZE 1

kernel-src/include/semaphore.h

@@ -27,6 +27,4 @@ void semaphore_signal(semaphore_t *sem);
 bool semaphore_test(semaphore_t *sem);
 bool semaphore_haswaiters(semaphore_t *sem);
 
-#include <kernel/scheduler.h>
-
 #endif

kernel-src/lib/semaphore.c

@@ -1,4 +1,5 @@
 #include <semaphore.h>
+#include <kernel/scheduler.h>
 #include <errno.h>
 #include <logging.h>