Date: Tue, 12 Mar 2019 15:58:31 -0600 From: Alan Somers <asomers@freebsd.org> To: Konstantin Belousov <kib@freebsd.org> Cc: src-committers <src-committers@freebsd.org>, svn-src-all <svn-src-all@freebsd.org>, svn-src-head <svn-src-head@freebsd.org> Subject: Re: svn commit: r318736 - in head: cddl/lib/libzfs contrib/compiler-rt/lib/sanitizer_common contrib/openbsm/libbsm include lib/libarchive lib/libc/gen lib/libc/include lib/libc/sys lib/libkvm lib/libmi... Message-ID: <CAOtMX2j7tmHyQGRV5vxaVSy6ZMA6zUSUZnfgY6wDM6N9cVOJ%2BQ@mail.gmail.com> In-Reply-To: <201705230929.v4N9T5g1028124@repo.freebsd.org> References: <201705230929.v4N9T5g1028124@repo.freebsd.org>
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On Tue, May 23, 2017 at 3:29 AM Konstantin Belousov <kib@freebsd.org> wrote: > > Author: kib > Date: Tue May 23 09:29:05 2017 > New Revision: 318736 > URL: https://svnweb.freebsd.org/changeset/base/318736 > > Log: > Commit the 64-bit inode project. > > Extend the ino_t, dev_t, nlink_t types to 64-bit ints. Modify > struct dirent layout to add d_off, increase the size of d_fileno > to 64-bits, increase the size of d_namlen to 16-bits, and change > the required alignment. Increase struct statfs f_mntfromname[] and > f_mntonname[] array length MNAMELEN to 1024. > > ABI breakage is mitigated by providing compatibility using versioned > symbols, ingenious use of the existing padding in structures, and > by employing other tricks. Unfortunately, not everything can be > fixed, especially outside the base system. For instance, third-party > APIs which pass struct stat around are broken in backward and > forward incompatible ways. > > Kinfo sysctl MIBs ABI is changed in backward-compatible way, but > there is no general mechanism to handle other sysctl MIBS which > return structures where the layout has changed. It was considered > that the breakage is either in the management interfaces, where we > usually allow ABI slip, or is not important. > > Struct xvnode changed layout, no compat shims are provided. > > For struct xtty, dev_t tty device member was reduced to uint32_t. > It was decided that keeping ABI compat in this case is more useful > than reporting 64-bit dev_t, for the sake of pstat. > > Update note: strictly follow the instructions in UPDATING. Build > and install the new kernel with COMPAT_FREEBSD11 option enabled, > then reboot, and only then install new world. > > Credits: The 64-bit inode project, also known as ino64, started life > many years ago as a project by Gleb Kurtsou (gleb). Kirk McKusick > (mckusick) then picked up and updated the patch, and acted as a > flag-waver. Feedback, suggestions, and discussions were carried > by Ed Maste (emaste), John Baldwin (jhb), Jilles Tjoelker (jilles), > and Rick Macklem (rmacklem). Kris Moore (kris) performed an initial > ports investigation followed by an exp-run by Antoine Brodin (antoine). > Essential and all-embracing testing was done by Peter Holm (pho). > The heavy lifting of coordinating all these efforts and bringing the > project to completion were done by Konstantin Belousov (kib). > > Sponsored by: The FreeBSD Foundation (emaste, kib) > Differential revision: https://reviews.freebsd.org/D10439 What's the purpose of the new dirent.d_off field? I can't find any code that uses it. I'm wondering if the fuse(4) module should set it in order to work properly over NFS, or something. -Alan
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