kernel: follow-up to hrev56619: use new(std::nothrow)

to handle allocation failures.

Change-Id: I15d84b24dcea17741382b1d5285acf6219a39811
Reviewed-on: https://review.haiku-os.org/c/haiku/+/5868
Reviewed-by: waddlesplash <waddlesplash@gmail.com>
Tested-by: Commit checker robot <no-reply+buildbot@haiku-os.org>

kernel/legacy_drivers: Use new/delete instead of malloc/free.

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>

kernel/device_manager: make sure we can reload the driver before unloading it

for instance usb drivers are unloaded when unused, but they will be
loaded again when a matching device appears. this can only work when
the boot device is already mounted.

Change-Id: Ia92c679cffb6a1fac143c9f8b3bb570fb4555719
Reviewed-on: https://review.haiku-os.org/c/haiku/+/5706
Tested-by: Commit checker robot <no-reply+buildbot@haiku-os.org>
Reviewed-by: waddlesplash <waddlesplash@gmail.com>

kernel: Don't load modules from non-packaged under "disable user add-ons".

This matches the behavior of the "new-style" module system.
Part of #14361.

kernel/legacy_drivers: Make asterisk style consistent.

Most of the file used space after asterisk, but some of it used spaces
before the asterisk. Now it's consistently after.

kernel: Don't watch the "dev" legacy driver directory.

We don't watch its children, and most drivers within it are within
subdirectories. Further, all drivers in it are really symlinks to "bin",
which we also watch. So there is really not much purpose in watching
"dev" directly.

Should fix #4638.

kernel: B_BEOS_* -> B_SYSTEM_* for directory constants.

Also clean up legacy_drivers' usage of them a bit.

kernel: Use anonymous namespaces to avoid type collisions.

The anonymous namespace makes type definitions local to the translation
unit (like static does for objects). For pretty much any type not shared
across multiple files this is what one wants to happen (and might
erroneously expect to happen automatically).

This commit solves some actual collisions that were present:

* The VFS and the rootfs both used an incompatible VnodeHash struct for
their BOpenHashTable.
* XSI semaphores and message queues both used queued_thread, Ipc and
IpcHashTableDefinition.

For release builds these did not cause problems as the types were fully
inlined. Debug builds would crash at boot however because parts of a
BOpenHashTable<VnodeHash> from the rootfs meant to operate on struct
rootfs_vnode would be applied to one from the VFS expecting struct
vnode.

As such collisions are violations of the one definition rule, the code
is at fault and unfortunatley the compiler isn't required to diagnose
such problems across translation units (which isn't actually trivial).
This can lead to subtle and hard to debug problems and it's therefore
best to avoid leaking types into the global namespace whenever possible.

legacy_drivers: convert to BOpenHashTable.

Add symbol versioning for find_directory()

Should already have been done back when the semantics for the
B_COMMON_*DIRECTORY constants was changed.

Currently old and new version behave the same. So this is just a
contingency measure ATM.

Remove /boot/common for good

* Remove support for the "common" installation location from packagefs,
package kit, package daemon, package managers.
* Rename the B_COMMON_*_DIRECTORY constants referring to writable
directories to B_SYSTEM_*_DIRECTORY.
* Remove/adjust the use of various B_COMMON_*_DIRECTORY constants.
I'm sure some occurrence still remain. They can be adjusted when the
remaining B_COMMON_*_DIRECTORY constants are removed.

Fix _user_entry_ref_to_path() in chroot

* Add "bool kernel" parameter to vfs_entry_ref_to_path(), so it can be
specified for which I/O context the entry ref shall be translated.
* _user_entry_ref_to_path(): Use the calling team's I/O context instead
of the kernel's. Fixes the bug that in a chroot the syscall would
return a path for outside the chroot.

Changed {,u}int64 to be long rather than long long on x86_64.

Added an ELF64 version of preloaded_image.

* There is now 2 structures, preloaded_elf32_image and preloaded_elf64_image,
which both inherit from preloaded_image.
* For now I've just hardcoded in use of preloaded_elf32_image, but the
bootloader ELF code will shortly be converted to use templates which use
the appropriate structure. The kernel will be changed later when I add
ELF64 support to it.
* All kernel_args data is now compatible between 32-bit and 64-bit kernels.

More 64-bit compilation/safety fixes.

Change instances of wether in comments to whether. No functional change intended.

* Obviously forgot to compile after a last minute change, sorry!


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@41121 a95241bf-73f2-0310-859d-f6bbb57e9c96

* legacy_driver::devices_used was not taken into account when deciding to
unload a driver. This was causing bug #4608 depending on the order of events;
now you should have less worries removing your USB device before having it
unmounted.
* Added a "legacy_device" KDL command.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@41119 a95241bf-73f2-0310-859d-f6bbb57e9c96

Use the unnamed namespace instead of an unofficial one.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@40061 a95241bf-73f2-0310-859d-f6bbb57e9c96

adding a LegacyDrivers namespace to avoid clash with other components (see #7018).


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@39945 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Corrected and improved debug output.
* Minor cleanup.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@37577 a95241bf-73f2-0310-859d-f6bbb57e9c96

Removed unnecessary inclusions of <boot/kernel_args.h> in private kernel
headers and respectively added includes in source files.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@37259 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Restructured the notification driven addition/removal of drivers to
driver_events (ie. there is now only a single list to walk).
* Also, the DriverWatcher is now maintained using the driver_events.
This fixes bug #5005.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@35463 a95241bf-73f2-0310-859d-f6bbb57e9c96

Fixed spelling.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@34144 a95241bf-73f2-0310-859d-f6bbb57e9c96

* VFS:
- Fixed vfs_get_vnode_from_fd() return type.
- Added vfs_open_vnode().
- Added a "bool traverseLeafLink" parameter to vfs_get_fs_node_from_path().
It was always resolving symlinks.
* device manager/devfs:
- devfs: get_node_for_path() no longer resolves leaf symlinks. That still
doesn't help with file disk devices, as creating partition wouldn't work
anyway.
- Pulled the module-related implementation part of BaseDevice into new class
AbstractModuleDevice and made all methods of BaseDevice virtual. Small
adjustments to devfs to be happy with the new BaseDevice interface.
- Added BaseDevice subclass FileDevice, which maps the interface to a file's
file descriptor. Still got a few TODOs, but should basically work.
- Use FileDevice for publishing file disk devices in devfs. Now those do
actually work, though there's some BFS trouble with one of the images I
tested.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@33385 a95241bf-73f2-0310-859d-f6bbb57e9c96

Use TRACE() instead of dprintf()


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@33134 a95241bf-73f2-0310-859d-f6bbb57e9c96

Added dprintf() to be able to see which driver hangs on load


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@33133 a95241bf-73f2-0310-859d-f6bbb57e9c96

* handle_driver_events() kept the sDriversListLock locked over the whole
time. But since this is also locked from within the driver/directory watcher
(with the node monitor lock held), and handle_driver_events() could cause
node monitoring updates, the locking order could be reverted, causing a
deadlock (I just ran into).


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@32152 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/private/kernel/util/OpenHashTable.h, Hugo's version, is a bit nicer than
Tracker's OpenHashTable.h which it should eventually replace. We've renamed the
class to BOpenHashTable and changed the interface slightly so that HashTableLink
became superfluous.
Adapted all the code that used it. Since the OpenHashTables no longer clash,
this should fix the GCC4 build.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@31791 a95241bf-73f2-0310-859d-f6bbb57e9c96

* reload_driver() now also checks if the binary node changed, and will update
the node listener, to make sure it won't lose track.
* The DriverWatcher now also listens for B_ENTRY_REMOVED. This causes drivers to
be unpublished even if they are only symlinked.
* However, to detect new drivers in a symlinked location, we'd need special
support for those, and also need to watch the parent directory of the symlink
target - this is close to overkill, so I stayed away from implementing that
for now :-)


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@31267 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Made the internal file systems correctly handle the timespec struct stat
times.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@31059 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Applied a patch by Rene that fixes bug #3856.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@30770 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Instead of deleting the device directly, we now only remove it from its
parent.
* Additionally, when a vnode is deleted, the new BaseDevice::Removed() method is
called that will remove the device from its parent if needed, and delete it
then.
* This should fix #3856.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@30726 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Added RemoveTail() method.
* Renamed DoublyLinkedList::Size() to Count(), since it actually counts the
items (ie. O(n)).


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@29979 a95241bf-73f2-0310-859d-f6bbb57e9c96

* proposition to fix a deadlock between kernel daemon and package installer install thread (bug #3447)
to manage this, avoid locking the main sLock in notification handling methods. Instead fill up two lists which will be emptied later by the kernel daemon thread.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@29603 a95241bf-73f2-0310-859d-f6bbb57e9c96

Do proper unlocking of the KPath when find_directory() fails. This should help with CD boot where find_directory() can't create folders on a read-only media.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@29139 a95241bf-73f2-0310-859d-f6bbb57e9c96

Fixing warnings under GCC4 in preparation to enable -Werror there as well:
* Replaced the use of offsetof() for structs that aren't PODs. Add a
offset_of_member() macro to util/khash.h because that's what it's used for
in our cases.
* Change the signature of add_debugger_command()/remove_debugger_command() on
GCC > 2 to avoid the depricated conversion from string constants to char *.
* Adding some "suggested" parenthesis. I know that not everyone likes that, but
it pointed out at least one bug that is fixed here as well.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@29113 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Greatly simplified republish_driver(); it doesn't need to use the path_entry
stuff at all, anymore.
* Removed now unused get_device_for_path().
* unpublish_driver() now only deletes the device if unpublishing actually
worked out okay.
* Minor cleanup.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@27038 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Added new devfs_unpublish_device() that gets a BaseDevice instead of a path.
* Added inode ID member to BaseDevice to make this possible.
* Removed unused and unmaintained legacy_driver::devices_published field.
* Implemented legacy driver's unpublish_driver().
* Reenabled legacy driver reloading on changes.
* Renamed devfs_driver_{added|removed}() to driver_{added|removed}(), and
made them private.
* Simplified deletion of device_node lists (no need to use an iterator here),
added device unpublishing.
* Minor cleanup.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@27033 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Removed -Wno-unused from all KernelMergeObjects in kernel Jamfiles.
* Fixed most of the warnings resulting from that by removing actually not used
variables or moving declaration into the #IF. Left unused functions there
though, as I wouldn't know if they are supposed to be used again.
* Fixed two statements with no effect (clamping to MAX_ANCILLARY_DATA_LEN in
socket.cpp and unsetting fCounterSem in MessagingService.cpp).
* Some style cleanups.

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@26253 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Only set the select hook on the device module if we actually got a select
hook from the legacy driver.
* Add note explaining why it is set to an arbitrary invalid value (~0) and why
it still works by redirecting in the virtual Select() of LegacyDevice.

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@26079 a95241bf-73f2-0310-859d-f6bbb57e9c96

Update the driver path and set binary_updated when we encounter a driver with
the same name but different path. In case of usb_disk that is now loaded as
a boot module the driver got registered with a different path, which prevented
later rescans from working. USB mass storage should now work again.

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@25862 a95241bf-73f2-0310-859d-f6bbb57e9c96

Replace the legacy driver mutex with a recursive lock. This fixes the deadlock
when hot-plugging a USB mass storage device. The legacy driver (usb_disk in
this case) was rescanned which locked the legacy driver mutex. The insertion
of the new device node caused the disk device manager (notified through node
monitoring) to try to scan the new node. As opening the node triggers
LegacyDevice::InitDevice() that locks the legacy driver mutex again a deadlock
occured.

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@25807 a95241bf-73f2-0310-859d-f6bbb57e9c96

Move the device deletion after the unpublish call. Fixes crashes where a
device is still referenced through the devfs and used right between deleting
and unpublishing.

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@25775 a95241bf-73f2-0310-859d-f6bbb57e9c96

Fix one reason for crashing on legacy driver rescans, but there seems to be
more to it.

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@25724 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Integration of the new driver architecture.
* Moved devfs from fs/ to device_manager/, and separated the legacy driver
support from it.
* Removed fast_log module.
* There are a couple of (temporary) regressions, though:
- legacy SATA and ISA IDE support is disabled, the drivers haven't been
ported yet.
- The not yet used ATA bus manager hasn't been ported yet, either.
- AHCI changes have not been tested.
- the listdev command has been removed from the build (as it currently
doesn't work anymore).
- device manager generated IDs currently are not freed anymore when a device
node is removed.
- generic drivers can't yet use the new driver architecture.
- simple busses that do not support device types won't work yet.
- legacy driver publishing/unpublishing (ie. what USB needs) has not been
tested, and may be broken.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@25662 a95241bf-73f2-0310-859d-f6bbb57e9c96

legacy_drivers: convert to BOpenHashTable.

Add symbol versioning for find_directory()

Should already have been done back when the semantics for the
B_COMMON_*DIRECTORY constants was changed.

Currently old and new version behave the same. So this is just a
contingency measure ATM.

Remove /boot/common for good

* Remove support for the "common" installation location from packagefs,
package kit, package daemon, package managers.
* Rename the B_COMMON_*_DIRECTORY constants referring to writable
directories to B_SYSTEM_*_DIRECTORY.
* Remove/adjust the use of various B_COMMON_*_DIRECTORY constants.
I'm sure some occurrence still remain. They can be adjusted when the
remaining B_COMMON_*_DIRECTORY constants are removed.

Fix _user_entry_ref_to_path() in chroot

* Add "bool kernel" parameter to vfs_entry_ref_to_path(), so it can be
specified for which I/O context the entry ref shall be translated.
* _user_entry_ref_to_path(): Use the calling team's I/O context instead
of the kernel's. Fixes the bug that in a chroot the syscall would
return a path for outside the chroot.

Changed {,u}int64 to be long rather than long long on x86_64.

Added an ELF64 version of preloaded_image.

* There is now 2 structures, preloaded_elf32_image and preloaded_elf64_image,
which both inherit from preloaded_image.
* For now I've just hardcoded in use of preloaded_elf32_image, but the
bootloader ELF code will shortly be converted to use templates which use
the appropriate structure. The kernel will be changed later when I add
ELF64 support to it.
* All kernel_args data is now compatible between 32-bit and 64-bit kernels.

More 64-bit compilation/safety fixes.

Change instances of wether in comments to whether. No functional change intended.

* Obviously forgot to compile after a last minute change, sorry!


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@41121 a95241bf-73f2-0310-859d-f6bbb57e9c96

* legacy_driver::devices_used was not taken into account when deciding to
unload a driver. This was causing bug #4608 depending on the order of events;
now you should have less worries removing your USB device before having it
unmounted.
* Added a "legacy_device" KDL command.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@41119 a95241bf-73f2-0310-859d-f6bbb57e9c96

Use the unnamed namespace instead of an unofficial one.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@40061 a95241bf-73f2-0310-859d-f6bbb57e9c96

adding a LegacyDrivers namespace to avoid clash with other components (see #7018).


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@39945 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Corrected and improved debug output.
* Minor cleanup.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@37577 a95241bf-73f2-0310-859d-f6bbb57e9c96

Removed unnecessary inclusions of <boot/kernel_args.h> in private kernel
headers and respectively added includes in source files.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@37259 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Restructured the notification driven addition/removal of drivers to
driver_events (ie. there is now only a single list to walk).
* Also, the DriverWatcher is now maintained using the driver_events.
This fixes bug #5005.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@35463 a95241bf-73f2-0310-859d-f6bbb57e9c96

Fixed spelling.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@34144 a95241bf-73f2-0310-859d-f6bbb57e9c96

* VFS:
- Fixed vfs_get_vnode_from_fd() return type.
- Added vfs_open_vnode().
- Added a "bool traverseLeafLink" parameter to vfs_get_fs_node_from_path().
It was always resolving symlinks.
* device manager/devfs:
- devfs: get_node_for_path() no longer resolves leaf symlinks. That still
doesn't help with file disk devices, as creating partition wouldn't work
anyway.
- Pulled the module-related implementation part of BaseDevice into new class
AbstractModuleDevice and made all methods of BaseDevice virtual. Small
adjustments to devfs to be happy with the new BaseDevice interface.
- Added BaseDevice subclass FileDevice, which maps the interface to a file's
file descriptor. Still got a few TODOs, but should basically work.
- Use FileDevice for publishing file disk devices in devfs. Now those do
actually work, though there's some BFS trouble with one of the images I
tested.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@33385 a95241bf-73f2-0310-859d-f6bbb57e9c96

Use TRACE() instead of dprintf()


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@33134 a95241bf-73f2-0310-859d-f6bbb57e9c96

Added dprintf() to be able to see which driver hangs on load


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@33133 a95241bf-73f2-0310-859d-f6bbb57e9c96

* handle_driver_events() kept the sDriversListLock locked over the whole
time. But since this is also locked from within the driver/directory watcher
(with the node monitor lock held), and handle_driver_events() could cause
node monitoring updates, the locking order could be reverted, causing a
deadlock (I just ran into).


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@32152 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/private/kernel/util/OpenHashTable.h, Hugo's version, is a bit nicer than
Tracker's OpenHashTable.h which it should eventually replace. We've renamed the
class to BOpenHashTable and changed the interface slightly so that HashTableLink
became superfluous.
Adapted all the code that used it. Since the OpenHashTables no longer clash,
this should fix the GCC4 build.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@31791 a95241bf-73f2-0310-859d-f6bbb57e9c96

* reload_driver() now also checks if the binary node changed, and will update
the node listener, to make sure it won't lose track.
* The DriverWatcher now also listens for B_ENTRY_REMOVED. This causes drivers to
be unpublished even if they are only symlinked.
* However, to detect new drivers in a symlinked location, we'd need special
support for those, and also need to watch the parent directory of the symlink
target - this is close to overkill, so I stayed away from implementing that
for now :-)


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@31267 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Made the internal file systems correctly handle the timespec struct stat
times.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@31059 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Applied a patch by Rene that fixes bug #3856.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@30770 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Instead of deleting the device directly, we now only remove it from its
parent.
* Additionally, when a vnode is deleted, the new BaseDevice::Removed() method is
called that will remove the device from its parent if needed, and delete it
then.
* This should fix #3856.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@30726 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Added RemoveTail() method.
* Renamed DoublyLinkedList::Size() to Count(), since it actually counts the
items (ie. O(n)).


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@29979 a95241bf-73f2-0310-859d-f6bbb57e9c96

* proposition to fix a deadlock between kernel daemon and package installer install thread (bug #3447)
to manage this, avoid locking the main sLock in notification handling methods. Instead fill up two lists which will be emptied later by the kernel daemon thread.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@29603 a95241bf-73f2-0310-859d-f6bbb57e9c96

Do proper unlocking of the KPath when find_directory() fails. This should help with CD boot where find_directory() can't create folders on a read-only media.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@29139 a95241bf-73f2-0310-859d-f6bbb57e9c96

Fixing warnings under GCC4 in preparation to enable -Werror there as well:
* Replaced the use of offsetof() for structs that aren't PODs. Add a
offset_of_member() macro to util/khash.h because that's what it's used for
in our cases.
* Change the signature of add_debugger_command()/remove_debugger_command() on
GCC > 2 to avoid the depricated conversion from string constants to char *.
* Adding some "suggested" parenthesis. I know that not everyone likes that, but
it pointed out at least one bug that is fixed here as well.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@29113 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Greatly simplified republish_driver(); it doesn't need to use the path_entry
stuff at all, anymore.
* Removed now unused get_device_for_path().
* unpublish_driver() now only deletes the device if unpublishing actually
worked out okay.
* Minor cleanup.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@27038 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Added new devfs_unpublish_device() that gets a BaseDevice instead of a path.
* Added inode ID member to BaseDevice to make this possible.
* Removed unused and unmaintained legacy_driver::devices_published field.
* Implemented legacy driver's unpublish_driver().
* Reenabled legacy driver reloading on changes.
* Renamed devfs_driver_{added|removed}() to driver_{added|removed}(), and
made them private.
* Simplified deletion of device_node lists (no need to use an iterator here),
added device unpublishing.
* Minor cleanup.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@27033 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Removed -Wno-unused from all KernelMergeObjects in kernel Jamfiles.
* Fixed most of the warnings resulting from that by removing actually not used
variables or moving declaration into the #IF. Left unused functions there
though, as I wouldn't know if they are supposed to be used again.
* Fixed two statements with no effect (clamping to MAX_ANCILLARY_DATA_LEN in
socket.cpp and unsetting fCounterSem in MessagingService.cpp).
* Some style cleanups.

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@26253 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Only set the select hook on the device module if we actually got a select
hook from the legacy driver.
* Add note explaining why it is set to an arbitrary invalid value (~0) and why
it still works by redirecting in the virtual Select() of LegacyDevice.

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@26079 a95241bf-73f2-0310-859d-f6bbb57e9c96

Update the driver path and set binary_updated when we encounter a driver with
the same name but different path. In case of usb_disk that is now loaded as
a boot module the driver got registered with a different path, which prevented
later rescans from working. USB mass storage should now work again.

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@25862 a95241bf-73f2-0310-859d-f6bbb57e9c96

Replace the legacy driver mutex with a recursive lock. This fixes the deadlock
when hot-plugging a USB mass storage device. The legacy driver (usb_disk in
this case) was rescanned which locked the legacy driver mutex. The insertion
of the new device node caused the disk device manager (notified through node
monitoring) to try to scan the new node. As opening the node triggers
LegacyDevice::InitDevice() that locks the legacy driver mutex again a deadlock
occured.

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@25807 a95241bf-73f2-0310-859d-f6bbb57e9c96

Move the device deletion after the unpublish call. Fixes crashes where a
device is still referenced through the devfs and used right between deleting
and unpublishing.

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@25775 a95241bf-73f2-0310-859d-f6bbb57e9c96

Fix one reason for crashing on legacy driver rescans, but there seems to be
more to it.

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@25724 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Integration of the new driver architecture.
* Moved devfs from fs/ to device_manager/, and separated the legacy driver
support from it.
* Removed fast_log module.
* There are a couple of (temporary) regressions, though:
- legacy SATA and ISA IDE support is disabled, the drivers haven't been
ported yet.
- The not yet used ATA bus manager hasn't been ported yet, either.
- AHCI changes have not been tested.
- the listdev command has been removed from the build (as it currently
doesn't work anymore).
- device manager generated IDs currently are not freed anymore when a device
node is removed.
- generic drivers can't yet use the new driver architecture.
- simple busses that do not support device types won't work yet.
- legacy driver publishing/unpublishing (ie. what USB needs) has not been
tested, and may be broken.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@25662 a95241bf-73f2-0310-859d-f6bbb57e9c96