kernel/device_manager: Implement B_GET_DRIVER_FOR_DEVICE

for legacy and new drivers.

This is an opcode for ioctl that can be used on almost any device entry found in /dev.
When used, ioctl will fill a buffer with the absolute path to the driver file that is
being used by the device.

This opcode was available in BeOS R5, though remained unimplemented in Haiku since
the introduction of the Device Manager almost two decades ago.

Original change by Jacob Secunda.

Change-Id: Ic49141b677b4158a63918459d4048450c825447c
Reviewed-on: https://review.haiku-os.org/c/haiku/+/5078
Tested-by: Commit checker robot <no-reply+buildbot@haiku-os.org>
Reviewed-by: Jérôme Duval <jerome.duval@gmail.com>

* Call module_init_post_boot_device() right after the boot volume has
been mounted, before anyone could try to load any modules from it.
Also pass it a flag whether the boot volume is where the boot loader
pre-loaded the modules from.
* module_init_post_boot_device() changes the pre-loaded module image
paths to normalized boot volume paths, now. Got rid of the code in
register_preloaded_module_image() which tried something like this.
* Changed module image ref counting. A referenced module has single
reference to its image, which is released when the module becomes
unreferenced.
* get_module() for a reference module will not try to re-get and re-set
the module's image anymore. That could lead to a similar module (from
different paths) being loaded at the same time. A module from a new
file can only be loaded when the old one has been put completely.
* Simplified B_KEEP_ALIVE module handling a bit. When the module is
initialized, we add another reference, which we'll never free. Thus
the module remains loaded without special handling. Removed
module_image::keep_loaded. A B_KEEP_ALIVE module remains referenced
and thus its image remains referenced, too.
* Removed module::file, a cached path to the module's image. An
optimization that wouldn't work with multiple root directories for
modules (/boot/beos/..., /boot/common/...) or when module files were
moved. get_module() does now always search the image file, when the
module is still unreferenced. This should be a bit slower than before,
but I didn't notice any difference in VMware at least. If it turns out
to be a problem we could introduce a more intelligent cache that stays
up to date by using node monitoring.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@27752 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Added a post boot device module init function that unloads all unused modules,
as they aren't unloaded when there is no boot device yet.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@27136 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Shuffled initializers around: the team, ELF, and module initializers come
now a lot earlier.
* That makes it now possible to use modules pretty early in the kernel (like
before timer_init(), or int_init_post_vm()).


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@26790 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Preparations for a module listener API - this will be used in the (disk)
device managers.
* Cleanup.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@26239 a95241bf-73f2-0310-859d-f6bbb57e9c96

Added function prototypes for the kernel private load_module() and unload_module() calls.
Made the header C++ safe.


git-svn-id: file:///srv/svn/repos/haiku/trunk/current@10820 a95241bf-73f2-0310-859d-f6bbb57e9c96

Removed the unused argument from module_init().


git-svn-id: file:///srv/svn/repos/haiku/trunk/current@7319 a95241bf-73f2-0310-859d-f6bbb57e9c96

Some header work: removed unnecessary dependencies to stage2.h, fixed
some broken C++ export definitions, added missing licenses etc.


git-svn-id: file:///srv/svn/repos/haiku/trunk/current@3152 a95241bf-73f2-0310-859d-f6bbb57e9c96

Added a module_test() function.


git-svn-id: file:///srv/svn/repos/haiku/trunk/current@2150 a95241bf-73f2-0310-859d-f6bbb57e9c96

Moved <types.h> to <sys/types.h>.
Removed dependencies on arch/x86/types.h - this file is not really used
anymore, now. Might prevent compiling on Windows, though.
Replaced "int" with "int32" for the id types.
Removed some stuff from ktypes.h because it didn't belong there.


git-svn-id: file:///srv/svn/repos/haiku/trunk/current@1120 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Call module_init_post_boot_device() right after the boot volume has
been mounted, before anyone could try to load any modules from it.
Also pass it a flag whether the boot volume is where the boot loader
pre-loaded the modules from.
* module_init_post_boot_device() changes the pre-loaded module image
paths to normalized boot volume paths, now. Got rid of the code in
register_preloaded_module_image() which tried something like this.
* Changed module image ref counting. A referenced module has single
reference to its image, which is released when the module becomes
unreferenced.
* get_module() for a reference module will not try to re-get and re-set
the module's image anymore. That could lead to a similar module (from
different paths) being loaded at the same time. A module from a new
file can only be loaded when the old one has been put completely.
* Simplified B_KEEP_ALIVE module handling a bit. When the module is
initialized, we add another reference, which we'll never free. Thus
the module remains loaded without special handling. Removed
module_image::keep_loaded. A B_KEEP_ALIVE module remains referenced
and thus its image remains referenced, too.
* Removed module::file, a cached path to the module's image. An
optimization that wouldn't work with multiple root directories for
modules (/boot/beos/..., /boot/common/...) or when module files were
moved. get_module() does now always search the image file, when the
module is still unreferenced. This should be a bit slower than before,
but I didn't notice any difference in VMware at least. If it turns out
to be a problem we could introduce a more intelligent cache that stays
up to date by using node monitoring.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@27752 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Added a post boot device module init function that unloads all unused modules,
as they aren't unloaded when there is no boot device yet.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@27136 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Shuffled initializers around: the team, ELF, and module initializers come
now a lot earlier.
* That makes it now possible to use modules pretty early in the kernel (like
before timer_init(), or int_init_post_vm()).


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@26790 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Preparations for a module listener API - this will be used in the (disk)
device managers.
* Cleanup.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@26239 a95241bf-73f2-0310-859d-f6bbb57e9c96

Added function prototypes for the kernel private load_module() and unload_module() calls.
Made the header C++ safe.


git-svn-id: file:///srv/svn/repos/haiku/trunk/current@10820 a95241bf-73f2-0310-859d-f6bbb57e9c96

Removed the unused argument from module_init().


git-svn-id: file:///srv/svn/repos/haiku/trunk/current@7319 a95241bf-73f2-0310-859d-f6bbb57e9c96

Some header work: removed unnecessary dependencies to stage2.h, fixed
some broken C++ export definitions, added missing licenses etc.


git-svn-id: file:///srv/svn/repos/haiku/trunk/current@3152 a95241bf-73f2-0310-859d-f6bbb57e9c96

Added a module_test() function.


git-svn-id: file:///srv/svn/repos/haiku/trunk/current@2150 a95241bf-73f2-0310-859d-f6bbb57e9c96

Moved <types.h> to <sys/types.h>.
Removed dependencies on arch/x86/types.h - this file is not really used
anymore, now. Might prevent compiling on Windows, though.
Replaced "int" with "int32" for the id types.
Removed some stuff from ktypes.h because it didn't belong there.


git-svn-id: file:///srv/svn/repos/haiku/trunk/current@1120 a95241bf-73f2-0310-859d-f6bbb57e9c96