rom/partition/addbootfilesystem.c

   1 /*
   2     Copyright © 2011-2017, 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
  29         filesystems (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
  39         is available. In this case filesystem loading will be delayed until
  40         dos.library started up. Delayed loading will be handled automatically
  41         without any caller's intervention.
  42
  43     EXAMPLE
  44
  45     BUGS
  46
  47     SEE ALSO
  48
  49     INTERNALS
  50
  51 *****************************************************************************/
  52 {
  53     AROS_LIBFUNC_INIT
  54
  55     ObtainSemaphore(&PBASE(PartitionBase)->bootSem);
  56
  57     if (!PBASE(PartitionBase)->pb_DOSBase)
  58         PBASE(PartitionBase)->pb_DOSBase = OpenLibrary("dos.library", 36);
  59
  60     /* If dos.library is available, load the filesystem immediately */
  61     if (PBASE(PartitionBase)->pb_DOSBase)
  62     {
  63         ReleaseSemaphore(&PBASE(PartitionBase)->bootSem);
  64         return AddFS(PartitionBase, (struct FileSysHandle *)handle);
  65     }
  66
  67     /* Otherwise we need to queue it to the FSLoader hook (if not already done) */
  68     if (!((struct FileSysHandle *)handle)->boot)
  69     {
  70         struct BootFileSystem *bfs = AllocMem(sizeof(struct BootFileSystem), MEMF_ANY);
  71
  72         if (!bfs)
  73         {
  74             ReleaseSemaphore(&PBASE(PartitionBase)->bootSem);
  75             return ERROR_NO_FREE_STORE;
  76         }
  77
  78         bfs->ln.ln_Name = handle->ln_Name;
  79         bfs->ln.ln_Pri  = handle->ln_Pri;
  80         bfs->handle = (struct FileSysHandle *)handle;
  81
  82         /* This will prevent ClosePartitionTable() from deallocating the handle */
  83         ((struct FileSysHandle *)handle)->boot = TRUE;
  84
  85         Enqueue(&((struct PartitionBase_intern *)PartitionBase)->bootList, &bfs->ln);
  86     }
  87
  88     ReleaseSemaphore(&PBASE(PartitionBase)->bootSem);
  89
  90     return 0;
  91
  92     AROS_LIBFUNC_EXIT
  93 }