Krn: Added a new driver for the iso9660 file system

Added a new driver for the iso9660 file system. The driver supports the current version of the disk subsystem and is intended for further translation of IDE ATAPI devices to this driver. The basic version of ISO9660 and the Joliet extension are supported.

git-svn-id: svn://kolibrios.org@10053 a494cfbc-eb01-0410-851d-a64ba20cac60

kernel/trunk/blkdev/disk.inc

@@ -83,6 +83,14 @@ struct  DISKFUNC
 ; Optional, may be NULL.
 ; unsigned int adjust_cache_size(void* userdata, unsigned int suggested_size);
 ; Return value: 0 = disable cache, otherwise = used cache size in bytes.
+        LoadTray        dd ?
+; This pointer to the function which load and unload tray drive.
+; Optional, may be NULL
+; int LoadTray(void* userdata, int flags);
+; flags:
+; 0 - load
+; 1 - unload
+; Return value: one of DISK_STATUS_*
 ends
 
 ; This structure holds information on a medium.
@@ -95,6 +103,8 @@ struct  DISKMEDIAINFO
 ; Size of the sector.
         Capacity        dq ?
 ; Size of the media in sectors.
+        LastSessionSector       dd ?
+; Number last session sectors for CDFS
 ends
 
 ; This structure represents the disk cache. To follow the old implementation,
@@ -599,6 +609,7 @@ disk_media_changed:
 ; 3a. Call the 'querymedia' callback.
 ; .Flags are set to zero for possible future extensions.
         lea     edx, [esi+DISK.MediaInfo]
+        and     [edx+DISKMEDIAINFO.LastSessionSector], 0
         and     [edx+DISKMEDIAINFO.Flags], 0
         mov     al, DISKFUNC.querymedia
         stdcall disk_call_driver, edx
@@ -1282,6 +1293,9 @@ end virtual
         call    xfs_create_partition
         test    eax, eax
         jnz     .success
+        call    iso9660_create_partition
+        test    eax, eax
+        jnz     .success
 ; 3. No file system has recognized the volume, so just allocate the PARTITION
 ; structure without extra fields.
         movi    eax, sizeof.PARTITION
@@ -1490,6 +1504,7 @@ dyndisk_handler:
 @@:
         cmp     byte [esi], 0
         jnz     @f
+        ;  partition  info
         cmp     byte [ebx], 1
         jz      @f
         cmp     byte [ebx], 5
@@ -1502,21 +1517,25 @@ dyndisk_handler:
 ; was inserted/removed/changed. Otherwise, assume that media status is valid.
         test    byte [edx+DISK.DriverFlags], DISK_NO_INSERT_NOTIFICATION
         jz      .media_accurate
+
         push    ecx esi
         mov     esi, edx
         cmp     dword [esp+8], 0
         jz      .test_no_media
         cmp     [esi+DISK.MediaRefCount], 2
         jnz     .media_accurate_pop
+
         lea     edx, [esi+DISK.MediaInfo]
         and     [edx+DISKMEDIAINFO.Flags], 0
         mov     al, DISKFUNC.querymedia
         stdcall disk_call_driver, edx
         test    eax, eax
         jz      .media_accurate_pop
+
         stdcall disk_media_dereference  ; drop our reference so that disk_media_changed could close the media
         stdcall disk_media_changed, esi, 0
         and     dword [esp+8], 0        ; no media
+        ;jmp     .media_accurate_pop
 .test_no_media:
         stdcall disk_media_changed, esi, 1      ; issue fake notification
 ; if querymedia() inside disk_media_changed returns error, the notification is ignored
@@ -1524,9 +1543,11 @@ dyndisk_handler:
         jz      .media_accurate_pop
         lock inc [esi+DISK.MediaRefCount]
         mov     dword [esp+8], esi
+
 .media_accurate_pop:
         mov     edx, esi
         pop     esi ecx
+
 .media_accurate:
         pop     eax
         test    eax, eax
@@ -1688,3 +1709,59 @@ dyndisk_enum_root:
         xor     eax, eax
         pop     edx             ; restore register used in file_system_lfn
         ret
+
+; void fastcall eject_disk_media(const char* str, uint32_t code);
+; for load/eject drive
+; ecx -> asciiz string disk name (sd0, usbhd0)
+; edx = code command(0 - LoadTray 1-EjectTray)
+eject_disk_media:
+        push    esi edx ecx
+
+        mov     ecx, disk_list_mutex
+        call    mutex_lock
+        ; find disk ejected
+        mov     edx, disk_list
+.next:
+        mov     edx, [edx]
+        cmp     edx, disk_list
+        jz      .nf
+
+        mov     ecx, [edx + DISK.Name]
+        mov     esi, [esp]
+@@:
+        lodsb
+        test    al, al
+        jz      @f
+
+        or      al, 0x20
+        cmp     al, [ecx]
+        jnz     .next
+        inc     ecx
+        jmp     @b
+@@:
+        cmp     byte[ecx], al
+        jnz     .next
+
+        mov     ecx, disk_list_mutex
+        call    mutex_unlock
+; found disk
+        pop     ecx edx esi
+
+        and     edx, 1b
+        mov     al, DISKFUNC.LoadTray
+        stdcall disk_call_driver, edx   ; ecx - code command
+        ret
+
+.nf:
+        mov     ecx, disk_list_mutex
+        call    mutex_unlock
+        pop     ecx edx esi
+        ret
+
+; for disk emulation PARTITION structure
+; int32_t find_part(char* esi) esi -> name disk and partition
+; return number partition or zero for disk and
+;find_part:
+;        mov     ecx, disk_list_mutex
+;
+;        ret