Date: Sun, 24 May 2009 12:39:38 +0000 (UTC) From: Konstantin Belousov <kib@FreeBSD.org> To: cvs-src-old@freebsd.org Subject: cvs commit: src/sys/kern kern_lockf.c src/sys/sys lockf.h Message-ID: <200905241239.n4OCdlCw030318@repoman.freebsd.org>
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kib 2009-05-24 12:39:38 UTC
FreeBSD src repository
Modified files:
sys/kern kern_lockf.c
sys/sys lockf.h
Log:
SVN rev 192685 on 2009-05-24 12:39:38Z by kib
The advisory lock may be activated or activated and removed during the
sleep waiting for conditions when the lock may be granted.
To prevent lf_setlock() from accessing possibly freed memory, add reference
counting to the struct lockf_entry. Bump refcount around the sleep.
Make lf_free_lock() return non-zero when structure was freed, and use
this after the sleep to return EINTR to the caller. The error code might
need a clarification, but we cannot return success to usermode, since
the lock is not owned anymore.
Reviewed by: dfr
Tested by: pho
MFC after: 1 month
Revision Changes Path
1.71 +15 -2 src/sys/kern/kern_lockf.c
1.24 +1 -0 src/sys/sys/lockf.h
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