Run fsx with -RW. (smbfs does not implement consistency between read-write access on the one hand, and mmap access on the other; using fsx -R -W avoids testing for those (known) bugs.) When fsx issues the sequence of operations: 1. write data, X. 2. truncate file down below X. 3. truncate file back above upper edge of X. 4. read from offset of prior data X then smbfs passes back the old prior file content, X, when it should instead return zeroes. Fix: The patch below could be described as a "hot glue gun" approach; but its also a thorough, suspenders-and-braces fix for this problem (which, btw, does not occur in the NetBSD version of smbfs.) I'm not really au-fait with the FreeBSD VM system, so I examined the FreeBSD-4 NFS client code (taken from FreeBSD 4.7's sys/nfs as at around April 2002) for the corresponding scenario under NFS;, and patched similar handling into the smbfs code. it may well be that not all the changes below are necessary; but they appear sufficient. This patch also applies cleanly to FreeBSD 4-stable as recent up to as recent as 4.9-STABLE January 2004; for me, it fixes the reported problem on all those releases. (If the problem is already fixed elsewhere in 4.x, I didn't notice). The timestamps on the diff below are genuine. Someone more familiar with the 4-STABLE NFS code might wish to subsequent later fixes into this patch; or reconstruct a similar fix starting from more recent 4-STABLE NFS code. I can't speak to FreeBSD-5. How-To-Repeat: repeat as above using fsx.
Responsible Changed From-To: freebsd-bugs->tjr I am the current smbfs maintainer.
Responsible Changed From-To: tjr->freebsd-bugs Unassign due to lack of time.
Responsible Changed From-To: freebsd-bugs->freebsd-fs Over to maintainer(s).
For bugs matching the following criteria: Status: In Progress Changed: (is less than) 2014-06-01 Reset to default assignee and clear in-progress tags. Mail being skipped
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