Implement an ATA driver, Add vfsmount/vfsunmount syscalls

kernel/syscall/syscall.c

@@ -10,6 +10,7 @@
 #include "sched.h"
 #include "devctl.h"
 #include "randcrypto.h"
+#include "vfs.h"
 
 int32_t SYSCALL1(sys_debugprint, string) {
   char *p = (char *)string;
@@ -27,4 +28,6 @@ SyscallFn SYSCALL_TABLE[SYSCALLS_MAX] = {
   [SYS_SCHEDRELEASE] = &sys_schedrelease,
   [SYS_DEVCTL]     = &sys_devctl,
   [SYS_RAND]       = &sys_rand,
+  [SYS_VFSMOUNT]   = &sys_vfsmount,
+  [SYS_VFSUNMOUNT] = &sys_vfsunmount,
 };

kernel/syscall/vfs.c

@@ -0,0 +1,63 @@
+#include <stdint.h>
+#include <stddef.h>
+#include <stdbool.h>
+#include "hal/hal.h"
+#include "syscall.h"
+#include "vfs.h"
+#include "errors.h"
+#include "sysdefs/devctl.h"
+#include "vfs/vfs.h"
+#include "spinlock/spinlock.h"
+#include "dev/dev.h"
+#include "proc/proc.h"
+#include "storedev/storedev.h"
+
+int32_t SYSCALL4(sys_vfsmount, mountpoint1, fstypestr1, devid1, format1) {
+  int32_t ret = E_OK;
+  char *mountpoint = (char *)mountpoint1;
+  char *fstypestr = (char *)fstypestr1;
+  Dev_t *dev = (Dev_t *)devid1;
+  bool format = (bool)format1;
+
+  if (mountpoint == NULL) { ret = E_INVALIDARGUMENT; goto done; }
+  if (fstypestr == NULL) { ret = E_INVALIDARGUMENT; goto done; }
+  if (dev == NULL) { ret = E_INVALIDARGUMENT; goto done; }
+
+  if (*dev >= PROC_DEVHANDLES_MAX) { ret = E_INVALIDARGUMENT; goto done; }
+
+  int32_t fstype;
+
+  if (hal_strcmp(fstypestr, "LittleFS") == 0) {
+    fstype = VFS_LITTLEFS;
+  } else {
+    ret = E_INVALIDARGUMENT;
+    goto done;
+  }
+
+  spinlock_acquire(&PROCS.spinlock);
+  Proc *proc = PROCS.current;
+  spinlock_release(&PROCS.spinlock);
+
+  Dev *dp = proc->devs[*dev];
+  if (dp == NULL) { ret = E_NOENTRY; goto done; }
+
+  StoreDev *sd = (StoreDev *)dp->extra;
+  if (sd != NULL && sd->_magic != STOREDEV_MAGIC) { ret = E_NOENTRY; goto done; }
+
+  ret = vfs_mount(mountpoint, fstype, sd, format);
+
+done:
+  return ret;
+}
+
+int32_t SYSCALL1(sys_vfsunmount, mountpoint1) {
+  int32_t ret = E_OK;
+  char *mountpoint = (char *)mountpoint1;
+  
+  if (mountpoint == NULL) { ret = E_INVALIDARGUMENT; goto done; }
+
+  ret = vfs_unmount(mountpoint);
+
+done:
+  return ret;
+}

kernel/syscall/vfs.h

@@ -0,0 +1,11 @@
+#ifndef SYSCALL_VFS_H_
+#define SYSCALL_VFS_H_
+
+#include <stdint.h>
+#include <stddef.h>
+#include "syscall.h"
+
+int32_t SYSCALL4(sys_vfsmount, mountpoint1, fstypestr1, devid1, format1);
+int32_t SYSCALL1(sys_vfsunmount, mountpoint1);
+
+#endif // SYSCALL_VFS_H_