Date: Tue, 17 Feb 2009 19:57:52 +0000 (UTC) From: John Baldwin <jhb@FreeBSD.org> To: cvs-src-old@freebsd.org Subject: cvs commit: src/sys/kern kern_descrip.c uipc_sem.c src/sys/modules/sem Makefile src/sys/sys file.h ksem.h user.h src/tools/regression/posixsem Makefile posixsem.c posixsem.t test.c test.h src/usr.bin/procstat procstat_files.c Message-ID: <200902172001.n1HK1ewQ000467@repoman.freebsd.org>
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jhb 2009-02-17 19:57:52 UTC
FreeBSD src repository
Modified files: (Branch: RELENG_7)
sys/kern kern_descrip.c uipc_sem.c
sys/modules/sem Makefile
sys/sys file.h ksem.h user.h
usr.bin/procstat procstat_files.c
Added files: (Branch: RELENG_7)
tools/regression/posixsem Makefile posixsem.c posixsem.t
test.c test.h
Log:
SVN rev 188727 on 2009-02-17 19:57:52Z by jhb
MFC: Rework the lifetime management of the kernel implementation of POSIX
semaphores. Specifically, semaphores are now represented as new file
descriptor type that is set to close on exec. This removes the need for
all of the manual process reference counting (and fork, exec, and exit
event handlers) as the normal file descriptor operations handle all of
that for us nicely. It is also suggested as one possible implementation
in the spec and at least one other OS (OS X) uses this approach.
Refer to the original commit for more details on specific bug fixes, etc.
A notable difference in this MFC relative to the original commit to HEAD
is that the MAC entry points are unchanged to preserve the ABI for MAC
policy modules. fstat() on a POSIX semaphore in 7 uses the
mac_check_posix_sem_getvalue() hook to determine access as that is the
closest match to stat() of the available hooks.
Discussed with: rwatson (MAC bits (or lack thereof))
Revision Changes Path
1.313.2.13 +6 -0 src/sys/kern/kern_descrip.c
1.28.2.4 +559 -627 src/sys/kern/uipc_sem.c
1.2.10.1 +1 -1 src/sys/modules/sem/Makefile
1.73.2.2 +1 -0 src/sys/sys/file.h
1.3.2.1 +24 -18 src/sys/sys/ksem.h
1.70.2.6 +1 -0 src/sys/sys/user.h
1.1.2.1 +11 -0 src/tools/regression/posixsem/Makefile (new)
1.1.2.1 +1437 -0 src/tools/regression/posixsem/posixsem.c (new)
1.1.2.1 +5 -0 src/tools/regression/posixsem/posixsem.t (new)
1.1.2.1 +128 -0 src/tools/regression/posixsem/test.c (new)
1.1.2.1 +59 -0 src/tools/regression/posixsem/test.h (new)
1.5.2.7 +4 -0 src/usr.bin/procstat/procstat_files.c
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