Align all filesystem relevant places to use B_UNSUPPORTED for unsupported
instead of a mix of B_NOT_SUPPORTED and B_UNSUPPORTED. This allows checking for
a specific error code. Probably one of those should be phased out...


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@43025 a95241bf-73f2-0310-859d-f6bbb57e9c96

Merged signals-merge branch into trunk with the following changes:
* Reorganized the kernel locking related to threads and teams.
* We now discriminate correctly between process and thread signals. Signal
handlers have been moved to teams. Fixes #5679.
* Implemented real-time signal support, including signal queuing, SA_SIGINFO
support, sigqueue(), sigwaitinfo(), sigtimedwait(), waitid(), and the addition
of the real-time signal range. Closes #1935 and #2695.
* Gave SIGBUS a separate signal number. Fixes #6704.
* Implemented <time.h> clock and timer support, and fixed/completed alarm() and
[set]itimer(). Closes #5682.
* Implemented support for thread cancellation. Closes #5686.
* Moved send_signal() from <signal.h> to <OS.h>. Fixes #7554.
* Lots over smaller more or less related changes.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@42116 a95241bf-73f2-0310-859d-f6bbb57e9c96

* if ioctl hook wasn't found, now returns B_DEV_INVALID_IOCTL
* in case fd_ioctl() was about to return B_DEV_INVALID_IOCTL, translate to ENOTTY to satisfy #7279.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@40787 a95241bf-73f2-0310-859d-f6bbb57e9c96

reverted r40686


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@40699 a95241bf-73f2-0310-859d-f6bbb57e9c96

FIONBIO and FIONREAD don't apply to directories, files, attributes: returns ENOTTY in these cases. This fixes #7279.
ENOTTY could also be replaced with a B_ error code.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@40686 a95241bf-73f2-0310-859d-f6bbb57e9c96

Merged the signals branch into trunk, with these changes:
* The team and thread kernel structures have been renamed to Team and Thread
respectively and moved into the new BKernel namespace.
* Several (kernel add-on) sources have been converted from C to C++ since
private kernel headers are included that are no longer C compatible.

Changes after merging:
* Fixed gcc 2 build (warnings mainly in the scary firewire bus manager).


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@40196 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Changed some POSIX error codes to native ones.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@37842 a95241bf-73f2-0310-859d-f6bbb57e9c96

Changed the type of the "op" parameter of the fs_vnode_ops::ioctl() hook and
the _kern_ioctl() syscall from ulong to uint32.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@36927 a95241bf-73f2-0310-859d-f6bbb57e9c96

bonefish+mmlr:
* Add file descriptor and IO context tracing.
* Some minor cleanup.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@36272 a95241bf-73f2-0310-859d-f6bbb57e9c96

Changed the FD selection/deselection handling a bit:
* B_EVENT_INVALID is no longer passed to the FD's select()/deselect() hooks.
* Now we always attach the select info to the I/O context, even if no event has
been selected. The reasoning is that B_EVENT_INVALID is always automatically
selected and handled by the VFS, so we need the handle to notify on close().


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@32417 a95241bf-73f2-0310-859d-f6bbb57e9c96

* _user_read_dir(): Allocate a temporary heap buffer passed into the kernel
instead of using the user buffer. This frees the VFS and FS implementations
from handling user buffers.
* Adjusted fix_dirent() accordingly.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@32384 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Replaced all "status < B_OK" with != B_OK - this should make the VFS layer
more robust against broken (userland) file systems.
* 80 character column cleanup.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@32184 a95241bf-73f2-0310-859d-f6bbb57e9c96

Added dup_foreign_fd() to duplicate a FD from another team.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@29468 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Fixed wrong use of MutexLocker as pointed out by Korli - nice catch! This
could have caused a number of problems.
* Fixed coding style violation Ingo introduced.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@29378 a95241bf-73f2-0310-859d-f6bbb57e9c96

Fixed build with tracing enabled.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@26772 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

Added get_open_fd() function which gets the descriptor and also
increments its open count.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@25317 a95241bf-73f2-0310-859d-f6bbb57e9c96

Fixed a race condition between select_fd() and close(). Since
select_fd() first added the select info to the IO context and then
called select() on the descriptor, a close() called at the same time
could already deselect the events and close the descriptor before
select_fd() was done with select(). select_fd() does now keep an own
open reference while selecting the events and add the select info
afterwards to the IO context (if the FD is still current).


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@25266 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Removed SyscallRestartWrapper comparison operators. They are not
needed, since we've got a cast operator.
* Reverted r24927-r24929. There's no potential ambiguity anymore.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@24949 a95241bf-73f2-0310-859d-f6bbb57e9c96

Added close_fd_index() which is pretty much like close(), but gets the
IO context in which to close the FD.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@24937 a95241bf-73f2-0310-859d-f6bbb57e9c96

better cast to the good type to avoid confusing gcc


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@24929 a95241bf-73f2-0310-859d-f6bbb57e9c96

hmm I managed to break the comparaison order...


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@24928 a95241bf-73f2-0310-859d-f6bbb57e9c96

gcc4 build fix. Here is one of the two errors:
src/system/kernel/fs/fd.cpp: In function 'ssize_t common_user_vector_io(int, off_t, const iovec*, size_t, bool)':
src/system/kernel/fs/fd.cpp:727: error: ISO C++ says that these are ambiguous, even though the worst conversion for the first is better than the worst conversion for the
second:
headers/private/kernel/syscall_restart.h:151: note: candidate 1: bool SyscallRestartWrapper<Type>::operator<(const Type&) const [with Type = long int]
src/system/kernel/fs/fd.cpp:727: note: candidate 2: operator<(long int, int) <built-in>


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@24927 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Renamed THREAD_FLAGS_IOCTL_SYSCALL to THREAD_FLAGS_SYSCALL,
syscall_restart_ioctl_is_restarted() to syscall_restart_is_restarted,
IoctlSyscallFlagUnsetter to SyscallFlagUnsetter, and
IoctlSyscallRestartWrapper to SyscallRestartWrapper, as they are no
longer only used for ioctl().
* Removed unused syscall_restart_ioctl_handle_post().
* Made SyscallRestartWrapper a lot fancier. Instead of storing a
reference to the result value, it stores the value itself, and it
features all the interesting operators that make it appear like that
value. This simplifies the use of the class quite a bit.
* THREAD_FLAGS_SYSCALL is now set for all socket function and the
read[v](), write[v]() syscalls.
* Added is_syscall() function and net_stack hook to the net stack.
* Removed "kernel" parameter from all net_stack_interface and net_socket
module hooks. They aren't need any longer, since is_syscall() can be
used instead.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@24914 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Fixed some checks for user addresses. IS_KERNEL_ADDRESS is not the
same as !IS_USER_ADDRESS.
* Use the new IoctlSyscallFlagUnsetter helper class in _kern_ioctl().
The former implementation wasn't checking correctly for a previous
syscall flag.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@24904 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Implemented support for chroot:
- Added a "root" vnode to the io_context. It is used for resolving
paths and converting nodes to paths instead of sRoot. Some more
passing around of io_context structures was necessary.
- Introduced a new lock sIOContextRootLock to protect
io_context::root. The current uses of io_context::io_mutex
(put_vnode(), remove_vnode() while holding it) looked too suspicious
to use that mutex in vnode_path_to_vnode().
- Added _kern_change_root() syscall and chroot() libroot function.
- Added chroot coreutils program to the image. Funnily it seems to be
much easier to set up a little jail than under Linux (just copy
bash and libroot.so into respective subdirs; mount another pipefs
if you want pipe support).
With Haiku allowing direct access to directories via inode IDs
jailing is obviously not very secure at the moment.
- Added /var/empty to the image. It will be the chroot target for ssh.
* Changed vfs.cpp:get_cwd() so that the io_context::io_mutex is no
longer held when calling dir_vnode_to_path().


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@24673 a95241bf-73f2-0310-859d-f6bbb57e9c96

axeld + bonefish:
* Implemented automatic syscall restarts:
- A syscall can indicate that it has been interrupted and can be
restarted by setting a respective bit in thread::flags. It can
store parameters it wants to be preserved for the restart in
thread::syscall_restart::parameters. Another thread::flags bit
indicates whether it has been restarted.
- handle_signals() clears the restart flag, if the handled signal
has a handler function installed and SA_RESTART is not set. Another
thread flag (THREAD_FLAGS_DONT_RESTART_SYSCALL) can prevent syscalls
from being restarted, even if they could be (not used yet, but we
might want to use it in resume_thread(), so that we stay
behaviorally compatible with BeOS).
- The architecture specific syscall handler restarts the syscall, if
the restart flag is set. Implemented for x86 only.
- Added some support functions in the private <syscall_restart.h> to
simplify the syscall restart code in the syscalls.
- Adjusted all syscalls that can potentially be restarted accordingly.
- _user_ioctl() sets new thread flag THREAD_FLAGS_IOCTL_SYSCALL while
calling the underlying FS's/driver's hook, so that syscall restarts
can also be supported there.
* thread_at_kernel_exit() invokes handle_signals() in a loop now, as
long as the latter indicates that the thread shall be suspended, so
that after waking up signals received in the meantime will be handled
before the thread returns to userland. Adjusted handle_signals()
accordingly -- when encountering a suspending signal we don't check
for further signals.
* Fixed sigsuspend(): Suspending the thread and rescheduling doesn't
result in the correct behavior. Instead we employ a temporary
condition variable and interruptably wait on it. The POSIX test
suite test passes, now.
* Made the switch_sem[_etc]() behavior on interruption consistent.
Depending on when the signal arrived (before the call or when already
waiting) the first semaphore would or wouldn't be released. Now we
consistently release it.
* Refactored _user_{read,write}[v]() syscalls. Use a common function for
either pair. The iovec version doesn't fail anymore, if anything could
be read/written at all. It also checks whether a complete vector
could be read/written, so that we won't skip data, if the underlying
FS/driver couldn't read/write more ATM.
* Some refactoring in the x86 syscall handler: The int 99 and sysenter
handlers use a common subroutine to avoid code duplication.



git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@23983 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Fixed _{kern|user}_{read|write}[v]() functions to not move the descriptor's
file position in case an offset was specified.
* Reverted r23828-r23830 in File.cpp: don't fix the symptoms but the cause
of the problem (hey, that has to be in the kernel, right? :))
* Cleanup of File.cpp, removed OpenBeOS namespace.
* Moved user_fd_kernel_ioctl() to the section where it belongs to (that
function should be renamed, though).


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@23832 a95241bf-73f2-0310-859d-f6bbb57e9c96

Merged branch haiku/branches/developer/bonefish/optimization revision
23139 into trunk, with roughly the following changes (for details svn
log the branch):
* The int 99 syscall handler is now fully in assembly.
* Added a sysenter/sysexit handler and use it on Pentiums that support
it (via commpage).
* Got rid of i386_handle_trap(). A bit of functionality was moved into
the assembly handler which now uses a jump table to call C functions
handling the respective interrupt.
* Some optimizations to get user debugger support code out of the
interrupt handling path.
* Introduced a thread::flags fields which allows to skip handling of
rare events (signals, user debug enabling/disabling) on the
common interrupt handling path.
* Got rid of the explicit iframe stack. The iframes can still be
retrieved by iterating through the stack frames.
* Made the commpage an architecture independent feature. It's used for
the real time data stuff (instead of creating a separate area).
* The x86 CPU modules can now provide processor optimized versions for
common functions (currently memcpy() only). They are used in the
kernel and are provided to the userland via commpage entries.
* Introduced build system feature allowing easy use of C structure
member offsets in assembly code.

Changes after merging:
* Fixed merge conflict in src/system/kernel/arch/x86/arch_debug.cpp
(caused by refactoring and introduction of "call" debugger command).



git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@23370 a95241bf-73f2-0310-859d-f6bbb57e9c96

* 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

* 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

* 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

Align all filesystem relevant places to use B_UNSUPPORTED for unsupported
instead of a mix of B_NOT_SUPPORTED and B_UNSUPPORTED. This allows checking for
a specific error code. Probably one of those should be phased out...


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@43025 a95241bf-73f2-0310-859d-f6bbb57e9c96

Merged signals-merge branch into trunk with the following changes:
* Reorganized the kernel locking related to threads and teams.
* We now discriminate correctly between process and thread signals. Signal
handlers have been moved to teams. Fixes #5679.
* Implemented real-time signal support, including signal queuing, SA_SIGINFO
support, sigqueue(), sigwaitinfo(), sigtimedwait(), waitid(), and the addition
of the real-time signal range. Closes #1935 and #2695.
* Gave SIGBUS a separate signal number. Fixes #6704.
* Implemented <time.h> clock and timer support, and fixed/completed alarm() and
[set]itimer(). Closes #5682.
* Implemented support for thread cancellation. Closes #5686.
* Moved send_signal() from <signal.h> to <OS.h>. Fixes #7554.
* Lots over smaller more or less related changes.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@42116 a95241bf-73f2-0310-859d-f6bbb57e9c96

* if ioctl hook wasn't found, now returns B_DEV_INVALID_IOCTL
* in case fd_ioctl() was about to return B_DEV_INVALID_IOCTL, translate to ENOTTY to satisfy #7279.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@40787 a95241bf-73f2-0310-859d-f6bbb57e9c96

reverted r40686


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@40699 a95241bf-73f2-0310-859d-f6bbb57e9c96

FIONBIO and FIONREAD don't apply to directories, files, attributes: returns ENOTTY in these cases. This fixes #7279.
ENOTTY could also be replaced with a B_ error code.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@40686 a95241bf-73f2-0310-859d-f6bbb57e9c96

Merged the signals branch into trunk, with these changes:
* The team and thread kernel structures have been renamed to Team and Thread
respectively and moved into the new BKernel namespace.
* Several (kernel add-on) sources have been converted from C to C++ since
private kernel headers are included that are no longer C compatible.

Changes after merging:
* Fixed gcc 2 build (warnings mainly in the scary firewire bus manager).


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@40196 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Changed some POSIX error codes to native ones.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@37842 a95241bf-73f2-0310-859d-f6bbb57e9c96

Changed the type of the "op" parameter of the fs_vnode_ops::ioctl() hook and
the _kern_ioctl() syscall from ulong to uint32.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@36927 a95241bf-73f2-0310-859d-f6bbb57e9c96

bonefish+mmlr:
* Add file descriptor and IO context tracing.
* Some minor cleanup.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@36272 a95241bf-73f2-0310-859d-f6bbb57e9c96

Changed the FD selection/deselection handling a bit:
* B_EVENT_INVALID is no longer passed to the FD's select()/deselect() hooks.
* Now we always attach the select info to the I/O context, even if no event has
been selected. The reasoning is that B_EVENT_INVALID is always automatically
selected and handled by the VFS, so we need the handle to notify on close().


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@32417 a95241bf-73f2-0310-859d-f6bbb57e9c96

* _user_read_dir(): Allocate a temporary heap buffer passed into the kernel
instead of using the user buffer. This frees the VFS and FS implementations
from handling user buffers.
* Adjusted fix_dirent() accordingly.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@32384 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Replaced all "status < B_OK" with != B_OK - this should make the VFS layer
more robust against broken (userland) file systems.
* 80 character column cleanup.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@32184 a95241bf-73f2-0310-859d-f6bbb57e9c96

Added dup_foreign_fd() to duplicate a FD from another team.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@29468 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Fixed wrong use of MutexLocker as pointed out by Korli - nice catch! This
could have caused a number of problems.
* Fixed coding style violation Ingo introduced.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@29378 a95241bf-73f2-0310-859d-f6bbb57e9c96

Fixed build with tracing enabled.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@26772 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

Added get_open_fd() function which gets the descriptor and also
increments its open count.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@25317 a95241bf-73f2-0310-859d-f6bbb57e9c96

Fixed a race condition between select_fd() and close(). Since
select_fd() first added the select info to the IO context and then
called select() on the descriptor, a close() called at the same time
could already deselect the events and close the descriptor before
select_fd() was done with select(). select_fd() does now keep an own
open reference while selecting the events and add the select info
afterwards to the IO context (if the FD is still current).


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@25266 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Removed SyscallRestartWrapper comparison operators. They are not
needed, since we've got a cast operator.
* Reverted r24927-r24929. There's no potential ambiguity anymore.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@24949 a95241bf-73f2-0310-859d-f6bbb57e9c96

Added close_fd_index() which is pretty much like close(), but gets the
IO context in which to close the FD.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@24937 a95241bf-73f2-0310-859d-f6bbb57e9c96

better cast to the good type to avoid confusing gcc


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@24929 a95241bf-73f2-0310-859d-f6bbb57e9c96

hmm I managed to break the comparaison order...


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@24928 a95241bf-73f2-0310-859d-f6bbb57e9c96

gcc4 build fix. Here is one of the two errors:
src/system/kernel/fs/fd.cpp: In function 'ssize_t common_user_vector_io(int, off_t, const iovec*, size_t, bool)':
src/system/kernel/fs/fd.cpp:727: error: ISO C++ says that these are ambiguous, even though the worst conversion for the first is better than the worst conversion for the
second:
headers/private/kernel/syscall_restart.h:151: note: candidate 1: bool SyscallRestartWrapper<Type>::operator<(const Type&) const [with Type = long int]
src/system/kernel/fs/fd.cpp:727: note: candidate 2: operator<(long int, int) <built-in>


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@24927 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Renamed THREAD_FLAGS_IOCTL_SYSCALL to THREAD_FLAGS_SYSCALL,
syscall_restart_ioctl_is_restarted() to syscall_restart_is_restarted,
IoctlSyscallFlagUnsetter to SyscallFlagUnsetter, and
IoctlSyscallRestartWrapper to SyscallRestartWrapper, as they are no
longer only used for ioctl().
* Removed unused syscall_restart_ioctl_handle_post().
* Made SyscallRestartWrapper a lot fancier. Instead of storing a
reference to the result value, it stores the value itself, and it
features all the interesting operators that make it appear like that
value. This simplifies the use of the class quite a bit.
* THREAD_FLAGS_SYSCALL is now set for all socket function and the
read[v](), write[v]() syscalls.
* Added is_syscall() function and net_stack hook to the net stack.
* Removed "kernel" parameter from all net_stack_interface and net_socket
module hooks. They aren't need any longer, since is_syscall() can be
used instead.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@24914 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Fixed some checks for user addresses. IS_KERNEL_ADDRESS is not the
same as !IS_USER_ADDRESS.
* Use the new IoctlSyscallFlagUnsetter helper class in _kern_ioctl().
The former implementation wasn't checking correctly for a previous
syscall flag.


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@24904 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Implemented support for chroot:
- Added a "root" vnode to the io_context. It is used for resolving
paths and converting nodes to paths instead of sRoot. Some more
passing around of io_context structures was necessary.
- Introduced a new lock sIOContextRootLock to protect
io_context::root. The current uses of io_context::io_mutex
(put_vnode(), remove_vnode() while holding it) looked too suspicious
to use that mutex in vnode_path_to_vnode().
- Added _kern_change_root() syscall and chroot() libroot function.
- Added chroot coreutils program to the image. Funnily it seems to be
much easier to set up a little jail than under Linux (just copy
bash and libroot.so into respective subdirs; mount another pipefs
if you want pipe support).
With Haiku allowing direct access to directories via inode IDs
jailing is obviously not very secure at the moment.
- Added /var/empty to the image. It will be the chroot target for ssh.
* Changed vfs.cpp:get_cwd() so that the io_context::io_mutex is no
longer held when calling dir_vnode_to_path().


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@24673 a95241bf-73f2-0310-859d-f6bbb57e9c96

axeld + bonefish:
* Implemented automatic syscall restarts:
- A syscall can indicate that it has been interrupted and can be
restarted by setting a respective bit in thread::flags. It can
store parameters it wants to be preserved for the restart in
thread::syscall_restart::parameters. Another thread::flags bit
indicates whether it has been restarted.
- handle_signals() clears the restart flag, if the handled signal
has a handler function installed and SA_RESTART is not set. Another
thread flag (THREAD_FLAGS_DONT_RESTART_SYSCALL) can prevent syscalls
from being restarted, even if they could be (not used yet, but we
might want to use it in resume_thread(), so that we stay
behaviorally compatible with BeOS).
- The architecture specific syscall handler restarts the syscall, if
the restart flag is set. Implemented for x86 only.
- Added some support functions in the private <syscall_restart.h> to
simplify the syscall restart code in the syscalls.
- Adjusted all syscalls that can potentially be restarted accordingly.
- _user_ioctl() sets new thread flag THREAD_FLAGS_IOCTL_SYSCALL while
calling the underlying FS's/driver's hook, so that syscall restarts
can also be supported there.
* thread_at_kernel_exit() invokes handle_signals() in a loop now, as
long as the latter indicates that the thread shall be suspended, so
that after waking up signals received in the meantime will be handled
before the thread returns to userland. Adjusted handle_signals()
accordingly -- when encountering a suspending signal we don't check
for further signals.
* Fixed sigsuspend(): Suspending the thread and rescheduling doesn't
result in the correct behavior. Instead we employ a temporary
condition variable and interruptably wait on it. The POSIX test
suite test passes, now.
* Made the switch_sem[_etc]() behavior on interruption consistent.
Depending on when the signal arrived (before the call or when already
waiting) the first semaphore would or wouldn't be released. Now we
consistently release it.
* Refactored _user_{read,write}[v]() syscalls. Use a common function for
either pair. The iovec version doesn't fail anymore, if anything could
be read/written at all. It also checks whether a complete vector
could be read/written, so that we won't skip data, if the underlying
FS/driver couldn't read/write more ATM.
* Some refactoring in the x86 syscall handler: The int 99 and sysenter
handlers use a common subroutine to avoid code duplication.



git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@23983 a95241bf-73f2-0310-859d-f6bbb57e9c96

* Fixed _{kern|user}_{read|write}[v]() functions to not move the descriptor's
file position in case an offset was specified.
* Reverted r23828-r23830 in File.cpp: don't fix the symptoms but the cause
of the problem (hey, that has to be in the kernel, right? :))
* Cleanup of File.cpp, removed OpenBeOS namespace.
* Moved user_fd_kernel_ioctl() to the section where it belongs to (that
function should be renamed, though).


git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@23832 a95241bf-73f2-0310-859d-f6bbb57e9c96

Merged branch haiku/branches/developer/bonefish/optimization revision
23139 into trunk, with roughly the following changes (for details svn
log the branch):
* The int 99 syscall handler is now fully in assembly.
* Added a sysenter/sysexit handler and use it on Pentiums that support
it (via commpage).
* Got rid of i386_handle_trap(). A bit of functionality was moved into
the assembly handler which now uses a jump table to call C functions
handling the respective interrupt.
* Some optimizations to get user debugger support code out of the
interrupt handling path.
* Introduced a thread::flags fields which allows to skip handling of
rare events (signals, user debug enabling/disabling) on the
common interrupt handling path.
* Got rid of the explicit iframe stack. The iframes can still be
retrieved by iterating through the stack frames.
* Made the commpage an architecture independent feature. It's used for
the real time data stuff (instead of creating a separate area).
* The x86 CPU modules can now provide processor optimized versions for
common functions (currently memcpy() only). They are used in the
kernel and are provided to the userland via commpage entries.
* Introduced build system feature allowing easy use of C structure
member offsets in assembly code.

Changes after merging:
* Fixed merge conflict in src/system/kernel/arch/x86/arch_debug.cpp
(caused by refactoring and introduction of "call" debugger command).



git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@23370 a95241bf-73f2-0310-859d-f6bbb57e9c96

* 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

* 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

* 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