rom/partition/addbootfilesystem.c

   1 /*
   2     Copyright © 2011, The AROS Development Team. All rights reserved.
   3     $Id: $
   4
   5 */
   6
   7 #include <exec/memory.h>
   8 #include <proto/exec.h>
   9
  10 #include "partition_support.h"
  11 #include "platform.h"
  12 #include "fsloader.h"
  13
  14 /*****************************************************************************
  15
  16     NAME */
  17 #include <libraries/partition.h>
  18
  19     AROS_LH1(LONG, AddBootFileSystem,
  20
  21 /*  SYNOPSIS */
  22     AROS_LHA(struct Node *, handle, A1),
  23
  24 /*  LOCATION */
  25     struct Library *, PartitionBase, 23, Partition)
  26
  27 /*  FUNCTION
  28     Adds the specified filesystem to the system list of bootable filesystems
  29     (actually FileSystem.resource).
  30
  31     INPUTS
  32     handle - Filesystem handle obtained by FindFileSystemA()
  33
  34     RESULT
  35     Zero if everything went okay or common dos.library-compliant error code.
  36
  37     NOTES
  38     This function can be called during system startup before dos.library is
  39     available. In this case filesystem loading will be delayed until dos.library
  40     started up. Delayed loading will be handled automatically without any caller's
  41     intervention.
  42
  43     EXAMPLE
  44
  45     BUGS
  46
  47     SEE ALSO
  48
  49     INTERNALS
  50
  51     HISTORY
  52
  53 *****************************************************************************/
  54 {
  55     AROS_LIBFUNC_INIT
  56
  57     ObtainSemaphore(&PBASE(PartitionBase)->bootSem);
  58
  59     if (!PBASE(PartitionBase)->pb_DOSBase)
  60         PBASE(PartitionBase)->pb_DOSBase = OpenLibrary("dos.library", 36);
  61
  62     /* If dos.library is available, load the filesystem immediately */
  63     if (PBASE(PartitionBase)->pb_DOSBase)
  64     {
  65         ReleaseSemaphore(&PBASE(PartitionBase)->bootSem);
  66         return AddFS(PartitionBase, (struct FileSysHandle *)handle);
  67     }
  68
  69     /* Otherwise we need to queue it to the FSLoader hook (if not already done) */
  70     if (!((struct FileSysHandle *)handle)->boot)
  71     {
  72         struct BootFileSystem *bfs = AllocMem(sizeof(struct BootFileSystem), MEMF_ANY);
  73
  74         if (!bfs)
  75         {
  76             ReleaseSemaphore(&PBASE(PartitionBase)->bootSem);
  77             return ERROR_NO_FREE_STORE;
  78         }
  79
  80         bfs->ln.ln_Name = handle->ln_Name;
  81         bfs->ln.ln_Pri  = handle->ln_Pri;
  82         bfs->handle = (struct FileSysHandle *)handle;
  83
  84         /* This will prevent ClosePartitionTable() from deallocating the handle */
  85         ((struct FileSysHandle *)handle)->boot = TRUE;
  86
  87         Enqueue(&((struct PartitionBase_intern *)PartitionBase)->bootList, &bfs->ln);
  88     }
  89
  90     ReleaseSemaphore(&PBASE(PartitionBase)->bootSem);
  91
  92     return 0;
  93
  94     AROS_LIBFUNC_EXIT
  95 }