Date: Thu, 22 Jun 2017 17:54:49 +0000 (UTC) From: Benjamin Kaduk <bjk@FreeBSD.org> To: doc-committers@freebsd.org, svn-doc-all@freebsd.org, svn-doc-head@freebsd.org Subject: svn commit: r50394 - head/en_US.ISO8859-1/htdocs/news/status Message-ID: <201706221754.v5MHsnxO049565@repo.freebsd.org>
next in thread | raw e-mail | index | archive | help
Author: bjk Date: Thu Jun 22 17:54:49 2017 New Revision: 50394 URL: https://svnweb.freebsd.org/changeset/doc/50394 Log: Add 2017Q2 ino64 entry from mkcusick Modified: head/en_US.ISO8859-1/htdocs/news/status/report-2017-04-2017-06.xml Modified: head/en_US.ISO8859-1/htdocs/news/status/report-2017-04-2017-06.xml ============================================================================== --- head/en_US.ISO8859-1/htdocs/news/status/report-2017-04-2017-06.xml Wed Jun 21 19:14:18 2017 (r50393) +++ head/en_US.ISO8859-1/htdocs/news/status/report-2017-04-2017-06.xml Thu Jun 22 17:54:49 2017 (r50394) @@ -83,4 +83,97 @@ <description>Miscellaneous</description> </category> + <project cat='proj'> + <title>64-bit Inode Numbers</title> + + <contact> + <person> + <name> + <given>Gleb</given> + <common>Kurtsou</common> + </name> + <email>gleb@FreeBSD.org</email> + </person> + + <person> + <name> + <given>Konstantin</given> + <common>Belousov</common> + </name> + <email>kib@FreeBSD.org</email> + </person> + + <person> + <name> + <given>Kirk</given> + <common>McKusick</common> + </name> + <email>mckusick@FreeBSD.org</email> + </person> + </contact> + + <links> + <url href="https://reviews.FreeBSD.org/D10439">Phabricator Review</url> + </links> + + <body> + <p>The 64-bit inode project was completed and merged into + &os; 12 on May 23, 2017. It extends the <tt>ino_t</tt>, + <tt>dev_t</tt>, and <tt>nlink_t</tt> types to be 64-bit + integers. It modifies the <tt>struct dirent</tt> layout to + add a <tt>d_off</tt> field, increases the size of + <tt>d_fileno</tt> to 64 bits, increases the size of + <tt>d_namlen</tt> to 16 bits, and changes the required + alignment of the structure. It increases the <tt>struct + statfs</tt> <tt>f_mntfromname[]</tt> and + <tt>f_mntonname[]</tt> array lengths from MNAMELEN to + 1024.</p> + + <p>ABI breakage is mitigated by providing compatibility using + versioned symbols, ingenious use of the existing padding in + structures, and employing various other tricks. + Unfortunately, not everything can be fixed, especially outside + the base system. For instance, third-party APIs which pass + <tt>struct stat</tt> as parameters are broken in backward- and + forward-incompatible ways.</p> + + <p>The ABI for <tt>kinfo</tt> sysctl MIBs is changed in a + 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 management interfaces, where we usually allow ABI + slippage, or is not important.</p> + + <p>The layout of <tt>struct xvnode</tt> changed, and no + compatibility shims are provided.</p> + + <p>For <tt>struct xtty</tt>, the <tt>dev_t tty</tt> device + member was reduced to be just <tt>uint32_t</tt>. It was + decided that maintaining ABI compatability in this case is + more useful than reporting a 64-bit <tt>dev_t</tt> value, for + the sake of <tt>pstat</tt>.</p> + + <p>Updating note: strictly follow the instructions in + <tt>UPDATING</tt>. Build and install the new kernel with the + <tt>COMPAT_FREEBSD11</tt> option enabled, then reboot, and + only then install the new world.</p> + + <p>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). </p> + </body> + + <sponsor> + The FreeBSD Foundation (emaste, kib) + </sponsor> + </project> </report>
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?201706221754.v5MHsnxO049565>