feat: capability list to enable greater flexibility of devices

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

diff --git a/lunaix-os/kernel/fs/vfs.c b/lunaix-os/kernel/fs/vfs.c
index 490b4dfd285cc05a7c7791427a60984f3ebc2204..28cede5e5a2ad44e2dc90487acb3dad79c98e93e 100644 (file)
--- a/lunaix-os/kernel/fs/vfs.c
+++ b/lunaix-os/kernel/fs/vfs.c
@@ -708,7 +708,7 @@ __DEFINE_LXSYSCALL3(int, read, int, fd, void*, buf, size_t, count)
     file->inode->atime = clock_unixtime();
 
     if ((file->inode->itype & VFS_IFSEQDEV) || (fd_s->flags & FO_DIRECT)) {
-        errno = file->ops->read(file->inode, buf, count, file->f_pos);
+    errno = file->ops->read(file->inode, buf, count, file->f_pos);
     } else {
         errno = pcache_read(file->inode, buf, count, file->f_pos);
     }
@@ -860,7 +860,7 @@ vfs_readlink(struct v_dnode* dnode, char* buf, size_t size)
 int
 vfs_get_dtype(int itype)
 {
-    if ((itype & VFS_IFSYMLINK)) {
+    if ((itype & VFS_IFSYMLINK) == VFS_IFSYMLINK) {
         return DT_SYMLINK;
     } else if (!(itype & VFS_IFFILE)) {
         return DT_DIR;
@@ -1003,6 +1003,11 @@ __DEFINE_LXSYSCALL1(int, mkdir, const char*, path)
         goto done;
     }
 
+    if (!(errno = vfs_walk(parent, name_value, &dir, NULL, 0))) {
+        errno = EEXIST;
+        goto done;
+    }
+
     if ((errno = vfs_check_writable(parent))) {
         goto done;
     }
@@ -1235,14 +1240,19 @@ void
 vfs_ref_dnode(struct v_dnode* dnode)
 {
     atomic_fetch_add(&dnode->ref_count, 1);
-    mnt_mkbusy(dnode->mnt);
+    
+    if (dnode->mnt) {
+        mnt_mkbusy(dnode->mnt);
+    }
 }
 
 void
 vfs_unref_dnode(struct v_dnode* dnode)
 {
     atomic_fetch_sub(&dnode->ref_count, 1);
-    mnt_chillax(dnode->mnt);
+    if (dnode->mnt) {
+        mnt_chillax(dnode->mnt);
+    }
 }
 
 int
@@ -1448,7 +1458,7 @@ __DEFINE_LXSYSCALL2(int, fstat, int, fd, struct file_stat*, stat)
                                .st_blksize = vino->sb->blksize};
 
     if (VFS_DEVFILE(vino->itype)) {
-        struct device* rdev = (struct device*)vino->data;
+        struct device* rdev = resolve_device(vino->data);
         if (!rdev || rdev->magic != DEV_STRUCT_MAGIC) {
             errno = EINVAL;
             goto done;