wasn't doing. Rather than just lock and unlock the vnode around the call
to VOP_FSYNC(), implement rwatson's suggestion to lock the file vnode
in kern_link() before calling VOP_LINK(), since the other filesystems
also locked the file vnode right away in their link methods. Remove the
locking and and unlocking from the leaf filesystem link methods.
Reviewed by: rwatson, bde (except for the unionfs_link() changes)
header and return that length, was misguided.
The check itself didn't take into account the fact that the
mbuf pointer pased in may be null, and the function is
defined specifically for cases where the caller knows what it wants.
Rather than fix the check I'm removing it as phk suggested.
Submitted by: phk@freebsd.org
Option 'P1003_1B_SEMAPHORES' to compile them in, or load the "sem" module
to activate them.
Have kern/makesyscalls.sh emit an include for sys/_semaphore.h into sysproto.h
to pull in the typedef for semid_t.
Add the syscalls to the syscall table as module stubs.
that are shareable between processes.
There will be a cleanup shortly along with the necessary changes made to
libc, libc_r, libpthread as well as the hooks into sys/conf and sys/modules.
- Remove all instances of the mallochash.
- Stash the slab pointer in the vm page's object pointer when allocating from
the kmem_obj.
- Use the overloaded object pointer to find slabs for malloced memory.
under way to move the remnants of the a.out toolchain to ports. As the
comment in src/Makefile said, this stuff is deprecated and one should not
expect this to remain beyond 4.0-REL. It has already lasted WAY beyond
that.
Notable exceptions:
gcc - I have not touched the a.out generation stuff there.
ldd/ldconfig - still have some code to interface with a.out rtld.
old as/ld/etc - I have not removed these yet, pending their move to ports.
some includes - necessary for ldd/ldconfig for now.
Tested on: i386 (extensively), alpha
- Use ucontext_t's to store KSE thread state.
- Synthesize state for the UTS upon each upcall, rather than
saving and copying a trapframe.
- Deliver signals to KSE-aware processes via upcall.
- Rename kse mailbox structure fields to be more BSD-like.
- Store the UTS's stack in struct proc in a stack_t.
Reviewed by: bde, deischen, julian
Approved by: -arch
next step is to allow > 1 to be allocated per process. This would give
multi-processor threads. (when the rest of the infrastructure is
in place)
While doing this I noticed libkvm and sys/kern/kern_proc.c:fill_kinfo_proc
are diverging more than they should.. corrective action needed soon.
functions. We add pnpinfo, locationinfo, devflags (the newbus flags
on the device), flags (the flags that device_get_flags returns) and
state to the list of things we return.
pnpinfo and locationinfo are place holders at the moment that will be
filled in by the device's parent (optionally). Userland programs will
likely use this information from time to time and take appropriate
actions.
Improvements to devinfo to follow.
recursion when closef() calls pfind() which also wants the proc lock.
This case only occurred when setugidsafety() needed to close unsafe files.
Reviewed by: truckman
v_tag is now const char * and should only be used for debugging.
Additionally:
1. All users of VT_NTS now check vfsconf->vf_type VFCF_NETWORK
2. The user of VT_PROCFS now checks for the new flag VV_PROCDEP, which
is propagated by pseudofs to all child vnodes if the fs sets PFS_PROCDEP.
Suggested by: phk
Reviewed by: bde, rwatson (earlier version)
Introduce biowait() function. Currently there is a race condition and the
mitigation is a timeout/retry. It is not obvious what kind of locking (if any)
is suitable for BIO_DONE, since the majority of users take are of this
themselves, and only a few places actually rely on the wakeup.
Sponsored by: DARPA & NAI Labs.
to be dropped, 2) attempting to lock acct_mtx while already holding it.
Sorry to those who experienced pain.
- Added two comments referring to two areas in which acct_mtx is held over
vnode operations that might sleep. Patch in the works for this.
request structure.
- Re-optimize the case of utrace being disabled by doing an explicit
KTRPOINT check instead of relying on the one in ktr_getrequest() so that
we don't waste time on a malloc in the non-tracing case.
- Change utrace() to return an error if the copyin() fails. Before it
would just ignore the request but still return success. This last is
a change in behavior and can be backed out if necessary.
transfer to a malloc'd buffer and use that bufer for the ktrace event.
This means that genio ktrace events no longer need to be synchronous.
- Now that ktr_buffer isn't overloaded to sometimes point to a cached uio
pointer for genio requests and always points to a malloc'd buffer if not
NULL, free the buffer in ktr_freerequest() instead of in
ktr_writerequest(). This closes a memory leak for ktrace events that
used a malloc'd buffer that had their vnode ripped out from under them
while they were on the todo list.
Suggested by: bde (1, in principle)
- Rename kern.ktrace_request_pool tunable/sysctl to
kern.ktrace.request_pool.
- Add a variable to control the max amount of data to log for genio events.
This variable is tunable via the tunable/sysctl kern.ktrace.genio_size
and defaults to one page.
Changed rename(2) to follow the letter of the POSIX spec. POSIX
requires rename() to have no effect if its args "resolve to the same
existing file". I think "file" can only reasonably be read as referring
to the inode, although the rationale and "resolve" seem to say that
sameness is at the level of (resolved) directory entries.
ext2fs_vnops.c, ufs_vnops.c:
Replaced code that gave the historical BSD behaviour of removing one
link name by checks that this code is now unreachable. This fixes
some races. All vnodes needed to be unlocked for the removal, and
locking at another level using something like IN_RENAME was not even
attempted, so it was possible for rename(x, y) to return with both x
and y removed even without any unlink(2) syscalls (one process can
remove x using rename(x, y) and another process can remove y using
rename(y, x)).
Prodded by: alfred
MFC after: 8 weeks
PR: 42617
