feat: support ioctl() syscall for direct control to devices

[lunaix-os.git] / lunaix-os / kernel / fs / mount.c

diff --git a/lunaix-os/kernel/fs/mount.c b/lunaix-os/kernel/fs/mount.c
index 7b83757e91b26740ac43426bbda421934a226750..38258ee68d831a6a52114b4a3d42ae2819406545 100644 (file)
--- a/lunaix-os/kernel/fs/mount.c
+++ b/lunaix-os/kernel/fs/mount.c
@@ -145,12 +145,12 @@ vfs_mount_at(const char* fs_name,
     }
 
     struct v_mount* parent_mnt = mnt_point->mnt;
     }
 
     struct v_mount* parent_mnt = mnt_point->mnt;

-    struct v_superblock* sb = vfs_sb_alloc();
+    struct v_superblock *sb = vfs_sb_alloc(), *old_sb = mnt_point->super_block;

     sb->dev = device;
     sb->dev = device;

+    mnt_point->super_block = sb;

 
     int errno = 0;
     if (!(errno = fs->mount(sb, mnt_point))) {
 
     int errno = 0;
     if (!(errno = fs->mount(sb, mnt_point))) {

-        mnt_point->super_block = sb;

         sb->fs = fs;
         sb->root = mnt_point;
 
         sb->fs = fs;
         sb->root = mnt_point;
 


@@ -167,6 +167,7 @@ vfs_mount_at(const char* fs_name,
     return errno;
 
 cleanup:
     return errno;
 
 cleanup:

+    mnt_point->super_block = old_sb;

     vfs_sb_free(sb);
     return errno;
 }
     vfs_sb_free(sb);
     return errno;
 }


@@ -233,7 +234,7 @@ __DEFINE_LXSYSCALL4(int,
 
     // By our convention.
     // XXX could we do better?
 
     // By our convention.
     // XXX could we do better?

-    struct device* device = (struct device*)dev->data;
+    struct device* device = (struct device*)dev->inode->data;

 
     if (!(dev->inode->itype & VFS_IFVOLDEV) || !device) {
         errno = ENOTDEV;
 
     if (!(dev->inode->itype & VFS_IFVOLDEV) || !device) {
         errno = ENOTDEV;