This should avoid occasional problems with syncing or unmounting
filesystems on machines which use the automounter. Tested
successfully under NetBSD-i386 3.1_STABLE and 4.0_BETA2.
NetBSD 4.0 will be the first release which supports digital transfer
mode. The feature made it into this release because of the rebranch.
This fixes PR bin/36199 by Andreas Burghardt.
Since this is called in fork() it does rather need to give the child
process the parent's emulation root.
This means that (for example) an emulated shell will, by default, run
programs from the emulation root.
PUFFS_KFLAG_WTCACHE. Second, create separate fids for reading and
writing. If opening for read, open a read-only fid and for write
a write-only fid; use these for reading and writing. When the
open-count for a node drops to zero, clunk both. This avoids hitting
the fid limit when accessing large directory hierarchies.
Two problems remain:
* does not take credentials into account, although we can only mount
the remote 9P file server with one set of credentials, so not a
huge worry
* doesn't work for the open/mmap/close/access_memory_window case, but
that will require some further kernel changes
avoid having to allocate space in the 'stackgap'
- which is very LWP unfriendly.
The additional code for non-emulation namei() is trivial, the reduction for
the emulations is massive.
The vnode for a processes emulation root is saved in the cwdi structure
during process exec.
If the emulation root the TRYEMULROOT flag are set, namei() will do an initial
search for absolute pathnames in the emulation root, if that fails it will
retry from the normal root.
".." at the emulation root will always go to the real root, even in the middle
of paths and when expanding symlinks.
Absolute symlinks found using absolute paths in the emulation root will be
relative to the emulation root (so /usr/lib/xxx.so -> /lib/xxx.so links
inside the emulation root don't need changing).
If the root of the emulation would be returned (for an emulation lookup), then
the real root is returned instead (matching the behaviour of emul_lookup,
but being a cheap comparison here) so that programs that scan "../.."
looking for the root dircetory don't loop forever.
The target for symbolic links is no longer mangled (it used to get the
CHECK_ALT_xxx() treatment, so could get /emul/xxx prepended).
CHECK_ALT_xxx() are no more. Most of the change is deleting them, and adding
TRYEMULROOT to the flags to NDINIT().
A lot of the emulation system call stubs could now be deleted.
so make it marginally less broken so that it works with other compilers
than gcc.
Probably the check can be removed, I doubt anyone will try to use gcc1
anymore.
instead of rtcache_free(). It is not desirable to clear the cached
destination as well as the route, however, rtcache_free() will
eventually release all resources held by the cache, including the
destination.
Add some additional diagnostic assertions.
firewirereg.h sync to Rev.1.41 for FreeBSD.
fwcrom.c sync to Rev.1.14 for FreeBSD.
fwdev.c sync to Rev.1.49 for FreeBSD.
fwmem.c sync to Rev.1.32 for FreeBSD.
fwohci.c sync to Rev.1.86 for FreeBSD.
fwohcivar.h sync to Rev.1.15 for FreeBSD.
if_fwip.c sync to Rev.1.14 for FreeBSD.
if_fwipvar.h sync to Rev.1.4 for FreeBSD.
sbp.c sync to Rev.1.89 for FreeBSD.
Works, but lots of little things to nibble on:
* fix permissions to work better
* limit the amount of open files required
* do constant folding with psshfs code
* support authentication
etcetc.
