Date: Wed, 12 Nov 2003 14:16:07 -0500 From: "Brian F. Feldman" <green@freebsd.org> To: Scott Long <scottl@freebsd.org> Cc: Kirk McKusick <mckusick@freebsd.org> Subject: Re: cvs commit: src/bin/df df.c src/sys/kern syscalls.master vfs_bio.c vfs_cluster.c vfs_syscalls.c src/sys/sys mount.h src/sys/ufs/ffs ffs_vfsops.c Message-ID: <200311121916.hACJG7ok002154@green.bikeshed.org> In-Reply-To: Message from Scott Long <scottl@freebsd.org> <20031112102742.E3170@pooker.samsco.home>
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Scott Long <scottl@freebsd.org> wrote: > On Wed, 12 Nov 2003, Kirk McKusick wrote:> mckusick 2003/11/12 00:01:40 PST > > > > FreeBSD src repository > > > > Modified files: > > bin/df df.c > > sys/kern syscalls.master vfs_bio.c vfs_cluster.c > > vfs_syscalls.c > > sys/sys mount.h > > sys/ufs/ffs ffs_vfsops.c > > Log: > > Update the statfs structure with 64-bit fields to allow > > accurate reporting of multi-terabyte filesystem sizes. > > > > You should build and boot a new kernel BEFORE doing a `make world' > > as the new kernel will know about binaries using the old statfs > > structure, but an old kernel will not know about the new system > > calls that support the new statfs structure. Running an old kernel > > after a `make world' will cause programs such as `df' that do a > > statfs system call to fail with a bad system call. > > > > Kirk, > > Thanks a lot for getting this in. Can you send a HEADS-UP email to the > lists (freebsd-current especially) just to make sure people understand the > implications? Does this mean someone may be free to write wrappers that block ENOSYS, execute statfs calls, and fall back to ostatfs calls (translating 64->32 bit values as best as possible, like the kernel does) returning the new statfs? Obviously, this would just be to add a safety window for the transition period and to be removed before a -RELEASE. -- Brian Fundakowski Feldman \'[ FreeBSD ]''''''''''\ <> green@FreeBSD.org \ The Power to Serve! \ Opinions expressed are my own. \,,,,,,,,,,,,,,,,,,,,,,\
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