More VFS/FAT12 structure work

[BOS.git] / kernel / vfs / vfs.asm

diff --git a/kernel/vfs/vfs.asm b/kernel/vfs/vfs.asm
index 30d5590c39e0f5c6f6593c9d2a8d4674ce44db6f..83cd12777cf41230fe4ac869b9ebaf7dbcf8a5bb 100644 (file)
--- a/kernel/vfs/vfs.asm
+++ b/kernel/vfs/vfs.asm
@@ -7,12 +7,6 @@
 ;----------------------------------------------------------;
 
 
 ;----------------------------------------------------------;
 
 

-    ; file handles need to be dword, where the high
-    ; word contains drive number, and the low word
-    ; is the drive/FS specific handle. limits FS to
-    ; a max of 65535 opened files. should be alright. ;)
-
-

     ;---------------------------------------------;
     ;   VFS main structure                        ;
     ;---------------------------------------------;
     ;---------------------------------------------;
     ;   VFS main structure                        ;
     ;---------------------------------------------;


@@ -56,6 +50,7 @@
     struc VFS_filesystem
     {
         .data_pointer         dd  0                   ; internal driver data
     struc VFS_filesystem
     {
         .data_pointer         dd  0                   ; internal driver data

+        .FSname               db  0,0,0,0,0           ; 5 char filesystem name

         .init                 dd  0                   ; pointer to init
         .deinit               dd  0                   ; remove driver
         .format               dd  0                   ; format drive
         .init                 dd  0                   ; pointer to init
         .deinit               dd  0                   ; remove driver
         .format               dd  0                   ; format drive


@@ -64,9 +59,12 @@
         .find                 dd  0                   ; find file
         .findnext             dd  0                   ; get next match
         .open                 dd  0                   ; open file, get handle
         .find                 dd  0                   ; find file
         .findnext             dd  0                   ; get next match
         .open                 dd  0                   ; open file, get handle

+        .close                dd  0                   ; close file from handle
+        .attrib               dd  0                   ; get/set attrib. and time

         .read                 dd  0                   ; read file from handle
         .write                dd  0                   ; write file from handle
         .seek                 dd  0                   ; seek from handle
         .read                 dd  0                   ; read file from handle
         .write                dd  0                   ; write file from handle
         .seek                 dd  0                   ; seek from handle

+        .rename               dd  0                   ; rename file

         .remove               dd  0                   ; remove file/dir
         .create               dd  0                   ; create file/dir
         .ioctl                dd  0                   ; extra calls if exists
         .remove               dd  0                   ; remove file/dir
         .create               dd  0                   ; create file/dir
         .ioctl                dd  0                   ; extra calls if exists


@@ -136,4 +134,25 @@ add_fs:
         push   eax
         ;...
         pop    eax
         push   eax
         ;...
         pop    eax

+        ret
+
+;--------------------------------------------------------------;
+;   open_file  -  open file, return handle                     ;
+;--------------------------------------------------------------;
+;                                                              ;
+;       in:  reg = ASCIIZ file name and such                   ;
+;                                                              ;
+;       out: reg = dword file handle                           ;
+;                                                              ;
+;--------------------------------------------------------------;
+open_file:
+        push   eax
+        ; file handles need to be dword, where the high
+        ; word contains drive number, and the low word
+        ; is the drive/FS specific handle.  meaning no internal
+        ; table in VFS, created dynamically with FS info.
+        ; limits FS to a max of 65535 opened files. most use fewer
+        ; as default. FAT12 driver has 32.
+        ; FS reports error if handle is invalid.
+        pop    eax

         ret
\ No newline at end of file
         ret
\ No newline at end of file