svn commit: r50394 - head/en_US.ISO8859-1/htdocs/news/status
Benjamin Kaduk <[email protected]>
| Newsgroups | gmane.os.freebsd.devel.cvs.doc |
|---|---|
| Message-ID | <[email protected]> |
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>[email protected]</email>
+ </person>
+
+ <person>
+ <name>
+ <given>Konstantin</given>
+ <common>Belousov</common>
+ </name>
+ <email>[email protected]</email>
+ </person>
+
+ <person>
+ <name>
+ <given>Kirk</given>
+ <common>McKusick</common>
+ </name>
+ <email>[email protected]</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>
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