Commit Graph

160 Commits

Author SHA1 Message Date
Axel Dörfler
80f5469291 * struct vnode is an opaque type now, removed void* where it was used incorrectly.
* Minor cleanup.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22461 a95241bf-73f2-0310-859d-f6bbb57e9c96
2007-10-06 15:33:12 +00:00
Ingo Weinhold
570263197e * Reviewed checking of empty paths and fixed some occurrences. Thanks to
mjw for the hint. Fixes bug #1516.
* Changed _{kern,user}_create_symlink() to no longer check the supplied
  link string. BeOS seems to do that, but this is not standard
  conforming. The previous implementation even used the path processed
  by check_path(), which would potentially have appended a ".".
* Some style cleanup.



git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22451 a95241bf-73f2-0310-859d-f6bbb57e9c96
2007-10-05 18:42:50 +00:00
Ingo Weinhold
6f05787478 * rootfs.c -> rootfs.cpp
* Made the kernel rootfs reusable by the FS Shell and removed the
  copy in the FS Shell sources.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22436 a95241bf-73f2-0310-859d-f6bbb57e9c96
2007-10-04 14:30:50 +00:00
Axel Dörfler
3e9513aa4a * fs_{write|read}_pages() now has an additional argument "mayBlock".
* the page writer don't allow to block, while all other writers do. This fixes
  bug #1509. The reason the page writer needs this is because it marks several
  pages from different caches as busy.
* Fixed a warning about ASSERT being defined already in BFS, since
  util/DoublyLinkedList.h now includes debug.h.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22434 a95241bf-73f2-0310-859d-f6bbb57e9c96
2007-10-04 12:45:15 +00:00
Ingo Weinhold
636bfc08ae * Renamed fs/vfs_select.cpp to wait_for_objects.cpp and got rid of
vfs_select.h, respectively moved most of it into the new kernel
  private header wait_for_objects.h.
* Added new experimental API functions wait_for_objects[_etc](). They
  work pretty much like poll(), but also for semaphores, ports, and
  threads.
* Removed the "ref" parameter from notify_select_events() and the
  select_sync_pool functions as well as from fd_ops::fd_[de]select(). It
  is no longer needed. The FS interface select() hook still has it,
  though -- the VFS will always pass 0.
* de]select_fd() take a select_info* instead of a select_sync* + ref
  pair, now. Added respective functions for semaphores, ports, and
  threads.



git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22416 a95241bf-73f2-0310-859d-f6bbb57e9c96
2007-10-02 19:47:31 +00:00
Ingo Weinhold
1c118ebc62 * Added a handy FDGetter AutoLocker-style class.
* In select_fd(): First get the file descriptor, then check whether any
  events have to be selected at all. This has the advantage that the
  caller can interpret an error return code as invalid FD. Consequently
  common_poll() no longer checks FD validity separately -- this was a
  race condition.
* common_poll() always selects POLLERR and POLLHUP now, which it has to
  do according to the specs.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22400 a95241bf-73f2-0310-859d-f6bbb57e9c96
2007-10-01 18:48:52 +00:00
Ingo Weinhold
66c03dc3a9 * fd.c -> fd.cpp
* Reworked the select support:
  - The io_context additionally stores a table of lists of select_infos,
    which enables it to deselect events of a pending select() when
    closing a FD. This prevents a race condition potentially causing a
    write to stale memory.
  - The opaque selectsync* passed to FSs is now actually a select_info*.
    This was necessary, since the FDs deselect() hook (unlike the
    select() hook) doesn't take a "ref" argument and deselecting a
    single info (e.g. caused by a premature close()) was not possible.
    The select() hook's "ref" argument has become superfluous.
  - It should now be relatively easy to implement a poll_on_steroids()
    that can also wait for objects other than FDs (e.g. semaphores,
    ports, threads etc.). 
* Set/reset the signal mask in common_select(). This makes pselect()
  work as required.
* Reorganized vfs_resize_fd_table().



git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22391 a95241bf-73f2-0310-859d-f6bbb57e9c96
2007-10-01 01:37:28 +00:00
Ingo Weinhold
d5cbcd91b7 * Use condition variables instead of semaphores for blocking readers and
writers.
* Removed the optimization for piping data between two threads of the
  same team. This greatly simplifies the code. It seems to me the case
  is very uncommon; it could be added back later, though.
* Basically rewrote reading from and writing to the pipe:
  - A blockable writer can now write more than what is currently
    available in the ring buffer.
  - Writing respects the PIPE_BUF non-interleaving limit, though our
    headers don't seem to define PIPE_BUF anywhere.
  - Unblock writers, when the last reader is gone and send those that
    haven't written anything yet a SIGPIPE. Fixes bug #1476.
* Correctly implemented select() support. We were only notifying
  writers. We manage two separate select sync pools per pipe now: one
  for the reader end and one for the writer end.
* Reading/writing from the root dir does no longer end in KDL.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22378 a95241bf-73f2-0310-859d-f6bbb57e9c96
2007-09-29 23:52:23 +00:00
Axel Dörfler
3392e9bcd6 * Added some more debug output.
* Cleanup.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22375 a95241bf-73f2-0310-859d-f6bbb57e9c96
2007-09-29 15:48:11 +00:00
Axel Dörfler
6d4aea4796 bonefish+axeld:
* Removed the vm_cache/vm_store ref_count duality that besides being a bit ugly
  also created the page dameon cache retrieval problem: now, only areas (and
  cache consumers) retrieve a reference to the store (and therefore, the vnode).
  The page daemon doesn't need to care about this at all anymore, and the pseudo
  references of the vm_cache could be removed again.
* Rearranged deletion of vnodes such that its ID can be reused directly after
  fs_remove_vnode() has been called.
* vm_page_allocate_page() no longer panics when it runs out of pages, but just
  waits for new pages to become available using the new sFreeCondition condition
  variable - to make sure this happens in an acceptable time frame, it'll
  trigger a run of the low memory handlers.
* Implemented a page_thief() that steals inactive pages from caches and puts
  them into the free queue. It runs as a low memory handler.
* The file cache now sets the usage count on the pages it inserts into the
  cache (needs some rework though, cache_io() doesn't do it yet).
* Instead of panicking, the kernel will currently dead lock in low memory
  situations, since BFS does a bit too much in bfs_release_vnode().
* Some minor cleanup.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22315 a95241bf-73f2-0310-859d-f6bbb57e9c96
2007-09-26 00:20:23 +00:00
Ingo Weinhold
8687956af2 * Added a clarifying comment to free_vnode() and prevented the vnode
reference count to drop below 0 there.
* Added TODO describing a serious race condition between free_vnode()
  and the page daemon.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22209 a95241bf-73f2-0310-859d-f6bbb57e9c96
2007-09-09 14:38:58 +00:00
Ingo Weinhold
62454aae66 Fixed get_mount(). It must also acquire the vnode lock before trying to
increment the root node vnode reference count. Otherwise it could race
with fs_unmount(). Fixes bug #1438.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22203 a95241bf-73f2-0310-859d-f6bbb57e9c96
2007-09-08 17:03:19 +00:00
Ingo Weinhold
43ab7500cc Some cleanup. Fixed gcc 4 warning.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22202 a95241bf-73f2-0310-859d-f6bbb57e9c96
2007-09-08 16:17:59 +00:00
Ingo Weinhold
76a8ec23db * Added disk system flags for whether a partition name and partition
content name are supported.
* Added file_system_module_info::flags (analogously to
  partition_module_info::flags) which indicate which disk device
  features the FS supports.
* Replaced the
  file_system_module_info/partition_module_info::supports_*()
  hooks by a get_supported_operations() hook and for partitioning
  systems additionally a get_supported_child_operations() hook.
* Updated file and partitioning systems accordingly.
* Updated fs_shell accordingly.
* Updated the DDM accordingly. The syscall interface remains unchanged,
  though.
* _user_supports_initializing_partition() also checks whether the parent
  partitioning system is content now.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22043 a95241bf-73f2-0310-859d-f6bbb57e9c96
2007-08-22 21:21:30 +00:00
Marcus Overhagen
20c4c9e77e Don't trust the user, and enforce the iovec limit.
Also check for negative positions smaller -1
(as -1 means using current address).


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@22031 a95241bf-73f2-0310-859d-f6bbb57e9c96
2007-08-21 19:07:10 +00:00
Axel Dörfler
f58cf973ad mmlr+bonefish(+axeld - I put the bug in there ;-)):
* Inode::MayReleaseWriter() would release the semaphore too often; therefore,
  Inode::WriteDataToBuffer() now loops in case it still couldn't write anything
  instead of failing - this fixes a race condition (ie. a device is full message).
* In case the read request got filled two times (while adding the request, and
  after waiting for it to become filled), ReadRequest::PutBuffer() overwrote the
  output data. This fixes bug #1331.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21830 a95241bf-73f2-0310-859d-f6bbb57e9c96
2007-08-05 23:38:31 +00:00
Marcus Overhagen
d1dc70fa5f FD_CLOEXEC is a flag, other bits may be set
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21829 a95241bf-73f2-0310-859d-f6bbb57e9c96
2007-08-05 13:56:01 +00:00
Axel Dörfler
edb15b5565 bonefish+axeld:
* Simplified the notification framework: removed the updater stuff completely;
  it was only there to account for some peculiarities of the node monitor which
  we now solved differently.
* NotificationListener no longer includes a doubly linked list link for convenience;
  it might want to listen to more than just one service.
* NotificationService cannot have an abstract destructor.
* Changed the _user_stop_watching() syscall to mirror the Be API; ie. it's no
  longer possible to just remove some flags separately, just to stop listening
  completely.
* Adapted the node monitor implementation to live in the NodeMonitorService class
  that uses the new notification framework.
* Removed the public kernel node monitor API - it wasn't useful that way since you
  couldn't do a lot with the KMessage in the kernel without using a private API.
  Now you will have to use the (private) notification manager to use the node monitor
  from inside the kernel. At a later point, we might introduce a public API for that,
  too.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21780 a95241bf-73f2-0310-859d-f6bbb57e9c96
2007-08-01 14:48:44 +00:00
Marcus Overhagen
ba8c1ff561 Make partition access saver. attempts to read or write outside of a partition
now fail with B_BAD_VALUE. It's also no longer possible to overwrite the begin
of a partition by specifying a negative position, as negative positions are no
longer translated into 0.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21702 a95241bf-73f2-0310-859d-f6bbb57e9c96
2007-07-25 22:30:59 +00:00
Ingo Weinhold
f4da50b768 Computed the netmask in net endianess. The wrong netmask caused
misrouting when the net server set up the loop device, thus stopping the
net boot process.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21662 a95241bf-73f2-0310-859d-f6bbb57e9c96
2007-07-19 13:58:17 +00:00
Ingo Weinhold
9c31fe7e21 Implemented emulating write_pages() using the write() hook.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21658 a95241bf-73f2-0310-859d-f6bbb57e9c96
2007-07-19 13:35:53 +00:00
Ingo Weinhold
fe679b9fa7 axeld+bonefish:
* Refactored RescanDiskSystems(). Pulled out a function
  _RescanDiskSystems() that scans for either file or partitioning
  systems. RescanDiskSystems(), which scanned for file systems only
  before, is used from the constructor as well (open_module_list()
  works in the early boot process since a while).
* Made InitialDeviceScan() and partition scanning safe to be called a second
  time. We call it directly after the kernel has mounted the boot
  volume, now, so that additional disk systems from the boot volume have a
  chance to recognize previously unrecognized partitions. This is a
  temporary change only; later the disk device manager shall
  automatically find out when new disk systems/devices/whatever are
  available.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21655 a95241bf-73f2-0310-859d-f6bbb57e9c96
2007-07-19 13:32:33 +00:00
Axel Dörfler
58f6e8e5e4 * Merged vm_cache_ref and vm_cache to a single structure (Axel & Ingo).
* Renamed vm_cache.c to vm_cache.cpp


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21642 a95241bf-73f2-0310-859d-f6bbb57e9c96
2007-07-18 00:16:27 +00:00
Ingo Weinhold
1fa400cd92 The partition offset is int64, of course, not bool. Sometimes one wishes,
C++ had a stricter typing.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21624 a95241bf-73f2-0310-859d-f6bbb57e9c96
2007-07-16 15:06:02 +00:00
Axel Dörfler
3a199128de * Now checks if the BootMethod allocation succeeds.
* Minor cleanup, reordered header files to go from private/local to public/global.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21623 a95241bf-73f2-0310-859d-f6bbb57e9c96
2007-07-15 23:51:21 +00:00
Axel Dörfler
bd1877933f remove_vnode() will now return an error code if the vnode to be removed did not exist.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21614 a95241bf-73f2-0310-859d-f6bbb57e9c96
2007-07-15 12:38:13 +00:00
Ingo Weinhold
9e8dc2a9bb [Sorry, couldn't split this one up any further.]
* Images preloaded by the boot loader had to be modules to be of any use
  to the kernel. Extended the mechanism so that any images not accepted
  by the module code would later be tried to be added as drivers by the
  devfs. This is a little hacky ATM, since the devfs manages the drivers
  using a hash map keyed by the drivers inode ID, which those drivers
  obviously don't have.
* The devfs emulates read_pages() using read(), if the device driver
  doesn't implement the former (all old-style drivers), thus making it
  possible to BFS, which uses the file cache which in turn requires
  read_pages(), on the device. write_pages() emulation is still missing.
* Replaced the kernel_args::boot_disk structure by a KMessage, which can
  more flexibly be extended and deals more gracefully with
  arbitrarily-size data. The disk_identifier structure still exists,
  though. It is added as message field in cases where needed (non net
  boot). Moved the boot_drive_number field of the bios_ia32 platform
  specific args into the message.
* Made the stage 1 PXE boot loader superfluous. Moved the relevant
  initialization code into the stage 2 loader, which can now be loaded
  directly via PXE.
* The PXE boot loader does now download a boot tgz archive via TFTP. It
  does no longer use the RemoteDisk protocol (it could actually be
  removed from the boot loader). It also parses the DHCP options in the
  DHCPACK packet provided by PXE and extracts the root path to be
  mounted by the kernel.
* Reorganized the boot volume search in the kernel (vfs_boot.cpp) and
  added support for network boot. In this case the net stack is
  initialized and the network interface the boot loader used is brought
  up and configured. Since NBD and RemoteDisk are our only options for
  net boot (and those aren't really configurable dynamically) ATM, the
  the boot device is found automatically by the disk device manager.

Booting via PXE does work to some degree now. The most grievous problem
is that loading certain drivers or kernel modules (or related activity)
causes a reboot (likely a triple fault, though one wonders where our
double fault handler is on vacation). Namely the keyboard and mouse input
server add-ons need to be deactivated as well as the media server.
A smaller problem is the net server, which apparently tries to
(re-)configure the network interface we're using to boot, which
obviously doesn't work out that well. So, if all this stuff is disabled
Haiku does fully boot, when using the RemoteDisk protocol (not being
able to use keyboard or mouse doesn't make this a particular fascinating
experience, though ;-)). I had no luck with NBD -- it seemed to have
protocol problems with the servers I tried.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21611 a95241bf-73f2-0310-859d-f6bbb57e9c96
2007-07-15 02:10:15 +00:00
Ingo Weinhold
3532662e0c Added RemoveLeaf() leaf method. Very handy for recursive directory
iteration code using a single KPath object.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21606 a95241bf-73f2-0310-859d-f6bbb57e9c96
2007-07-15 00:34:17 +00:00
Axel Dörfler
d5a279fef8 Cleanup.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21552 a95241bf-73f2-0310-859d-f6bbb57e9c96
2007-07-04 17:33:22 +00:00
Axel Dörfler
25f46ea449 * Reserving areas never put down their reference of their address space when
removed in several cases.
* vfs_get_vnode_cache() now always gives out a reference to the cache it
  returns; if it needs to allocate a new one, the vnode owns one reference,
  and the caller another.
* therefore, file_cache_create() now owns a reference to its vm_cache_ref, and
  frees it in file_cache_delete().


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21533 a95241bf-73f2-0310-859d-f6bbb57e9c96
2007-06-30 15:36:06 +00:00
Axel Dörfler
245aecda8a Got rid of vnode_id and mount_id, replaced with ino_t and dev_t.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21485 a95241bf-73f2-0310-859d-f6bbb57e9c96
2007-06-21 19:50:57 +00:00
François Revol
fc362b8ad7 handle api_version exported from driver.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21344 a95241bf-73f2-0310-859d-f6bbb57e9c96
2007-06-07 12:46:20 +00:00
Axel Dörfler
f415aa28be * create_vnode() now panicks when it could not find the freshly created vnode
in the vnode hash; that's a bug in the FS that shouldn't be ignored that way.
* Minor cleanup.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21262 a95241bf-73f2-0310-859d-f6bbb57e9c96
2007-05-28 14:17:18 +00:00
Axel Dörfler
aac3ed8c03 * Reverted r21199 (and therefore r21254) - it actually did work correctly initially,
see bug #1248.
* Closing a pipe now also removes it from the public namespace and marks it for
  deletion, and thus, there are no more left-overs after using a pipe.
* Minor cleanup.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21261 a95241bf-73f2-0310-859d-f6bbb57e9c96
2007-05-28 14:12:43 +00:00
Jérôme Duval
6015e60ecc fixed bug #1248
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21254 a95241bf-73f2-0310-859d-f6bbb57e9c96
2007-05-27 19:57:09 +00:00
Jérôme Duval
b5f602a702 added a missing newline, dunno why this message is displayed :)
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21250 a95241bf-73f2-0310-859d-f6bbb57e9c96
2007-05-27 14:25:49 +00:00
Hugo Santos
6580fd3848 Stylus cleanupus.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21224 a95241bf-73f2-0310-859d-f6bbb57e9c96
2007-05-23 21:48:31 +00:00
Hugo Santos
77bf99deb0 fixed the way accept() works in regards to the cookie pointer. It is no longer visible to userspace, we pass the fd instead. Also renamed kernel's shutdown() to system_shutdown as it collides with Posix's shutdown().
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21223 a95241bf-73f2-0310-859d-f6bbb57e9c96
2007-05-23 19:56:40 +00:00
Axel Dörfler
01e7c0d868 You should not publish *every* node - at least not without releasing the ref if you don't need it.
This should allow you to actually unmount /pipe if you so desire.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21199 a95241bf-73f2-0310-859d-f6bbb57e9c96
2007-05-22 01:56:45 +00:00
Axel Dörfler
6f709e745c * Added a name hash to pipefs; this should speedup the lookup when more pipes
are used at the same time.
* Added a TODO item: pipefs entries aren't deleted yet after usage!


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@21108 a95241bf-73f2-0310-859d-f6bbb57e9c96
2007-05-11 09:16:08 +00:00
Jérôme Duval
c0ca505fb0 devfs now accepts to create directories
is scanning needed here ?


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@20982 a95241bf-73f2-0310-859d-f6bbb57e9c96
2007-05-02 19:04:06 +00:00
Axel Dörfler
1c4b5b8a6a Added a debugging command "devfs_node" to dump infos about the private devfs nodes for now.
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@20794 a95241bf-73f2-0310-859d-f6bbb57e9c96
2007-04-24 14:04:26 +00:00
Ingo Weinhold
1e768ed1d3 get_vnode_name():
* read_dir() is supposed to return B_OK and and a count of 0 when
  reaching the end of the directory. In case the node in question could
  not be found, we were looping infinitely.
* free_dir_cookie() was not invoked.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@20519 a95241bf-73f2-0310-859d-f6bbb57e9c96
2007-04-03 04:29:24 +00:00
Axel Dörfler
6da6433598 * common_select() now also clears the sets for B_WOULD_BLOCK and any other error
that returns 0. Patch by Hugo Santos.
* Removed superfluous memset() of select_sync structures.
* Some cleanup.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@20467 a95241bf-73f2-0310-859d-f6bbb57e9c96
2007-03-29 16:09:53 +00:00
Ingo Weinhold
6376aa3f7a * The close-on-exit bitmap vfs_new_io_context() created was a byte
short, if the FD table size wasn't a multiple of 8.
* vfs_resize_fd_table() didn't seem to know at all about the
  close-on-exit bitmap. The pointer in the io_context would point to
  free()d memory afterwards. This explains the sporadically closed
  stdin/out/err descriptors in programs started from Tracker and
  Deskbar.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@20413 a95241bf-73f2-0310-859d-f6bbb57e9c96
2007-03-23 21:19:02 +00:00
Axel Dörfler
d349f3c941 select() is supposed to clear the sets in case of B_TIMED_OUT - found and patch
by Hugo Santos - thanks!


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@20412 a95241bf-73f2-0310-859d-f6bbb57e9c96
2007-03-23 20:40:03 +00:00
Ingo Weinhold
cf4ccd6575 Renamed the FS interface hook read_link() to read_symlink().
git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@20330 a95241bf-73f2-0310-859d-f6bbb57e9c96
2007-03-05 03:52:57 +00:00
Ingo Weinhold
12d359b85a * Removed write_link from the FS module interface. Adjusted all FS
add-ons accordingly and removed the syscall.
* Removed send_notification().
* Reimplemented notify_listener(). It used the unimplemented
  send_notification(). Now it has a chance to work. Note that
  notify_listener() is obsolete. I would already have removed it, if
  there weren't lots of FS implementations still using it (Hint!).


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@20329 a95241bf-73f2-0310-859d-f6bbb57e9c96
2007-03-05 00:46:57 +00:00
Ingo Weinhold
348be5b50b * Introduced the new static lock sVnodeCoveredByMutex to guard the
vnode::covered_by fields. Together with sMountOpLock it allows write
  access, either lock alone suffices for read access. Before
  sMountOpLock had to be acquired for read (and write) access, which
  meant that while mounting/unmounting a FS path resolution would have
  to wait. In case of the UserlandFS this would even cause a deadlock
  while mounting if the client tried to resolve the path of the device
  to be mounted (e.g. by opening it).
* Added a clarifying comment about read access to the
  fs_mount::covers_vnode/root_vnode field and removed locking in
  resolve_volume_root_to_mount_point() which was not necessary for
  explained reasons.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@20308 a95241bf-73f2-0310-859d-f6bbb57e9c96
2007-03-03 02:42:36 +00:00
Ingo Weinhold
2f742879c8 * Changed get_vnode_name() to take a dirent* parameter instead of the
name (saves copying the name, if that has to be done anyway) and added a
  wrapper version with the old interface.
* dir_vnode_to_path() was broken for file systems that didn't support
  the get_vnode_name() hook. It resolved the mount point too early, so
  that it was searching the mount point and not the FS root dir for the
  node. It uses the get_vnode_name() function now (before resolving the
  mount point).


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@20305 a95241bf-73f2-0310-859d-f6bbb57e9c96
2007-03-02 09:34:33 +00:00