a77facd273
Some context on the current IPv6 interface setup & address management: There are two data path for IPv6 initialisation in context of assigning LL addresses: 1) Userland explicitly requests IFF_UP for the interface w/o any addresses. if_up() then calls in6_if_up(), which calls in6_ifattach(). The latter sets up some initial ND/IN6 state and disables IPv6 for the interface if it’s not loopback. If the interface is loopback, then it adds ::1/128 and LL addresses via in6_ifattach_loopback(). Then, devd notification is generated (if the VNET is the default one), which triggers rc.network ifconfig_up(), causing ifdisabled to be removed via SIOCSIFINFO_IN6 from ifconfig. The kernel SIOCSIFINFO_IN6 handler calls in6_if_up() once again and it assigns the interface link-local address. 2) Userland adds IPv4 or IPv6 address to the interface. SIOCAIFADDR[_IN6] kernel handler calls IPv4/IPv6 protocol handler to add the address. Both then call if_ioctl() with SIOCSIFADDR. Ethernet/loopback ioctl handlers silently sets IFF_UP for the interface. Finally, if.c:ifioctl() wrapper code compares old and new interface flags and, if IFF_UP is added, it explicitly calls in6_if_up(), which adds link-local address if either the original address is IPv6 or the interface is loopback. In the latter case, “formal” interface-up notifications are missing. The kernel does not trigger event handler event, does not call carp hook and does not provide any userland notification. This diff unifies the event handling in both scenarios, providing the necessary notifications to the kernel and userland. Reviewed By: kp Differential Revision: https://reviews.freebsd.org/D40332 MFC after: 2 weeks |
||
|---|---|---|
| .cirrus-ci | ||
| .github | ||
| bin | ||
| cddl | ||
| contrib | ||
| crypto | ||
| etc | ||
| gnu | ||
| include | ||
| kerberos5 | ||
| lib | ||
| libexec | ||
| release | ||
| rescue | ||
| sbin | ||
| secure | ||
| share | ||
| stand | ||
| sys | ||
| targets | ||
| tests | ||
| tools | ||
| usr.bin | ||
| usr.sbin | ||
| .arcconfig | ||
| .arclint | ||
| .cirrus.yml | ||
| .clang-format | ||
| .git-blame-ignore-revs | ||
| .gitattributes | ||
| .gitignore | ||
| CONTRIBUTING.md | ||
| COPYRIGHT | ||
| LOCKS | ||
| MAINTAINERS | ||
| Makefile | ||
| Makefile.inc1 | ||
| Makefile.libcompat | ||
| Makefile.sys.inc | ||
| ObsoleteFiles.inc | ||
| README.md | ||
| RELNOTES | ||
| UPDATING | ||
FreeBSD Source:
This is the top level of the FreeBSD source directory.
FreeBSD is an operating system used to power modern servers, desktops, and embedded platforms. A large community has continually developed it for more than thirty years. Its advanced networking, security, and storage features have made FreeBSD the platform of choice for many of the busiest web sites and most pervasive embedded networking and storage devices.
For copyright information, please see the file COPYRIGHT in this directory. Additional copyright information also exists for some sources in this tree - please see the specific source directories for more information.
The Makefile in this directory supports a number of targets for building components (or all) of the FreeBSD source tree. See build(7), config(8), FreeBSD handbook on building userland, and Handbook for kernels for more information, including setting make(1) variables.
For information on the CPU architectures and platforms supported by FreeBSD, see the FreeBSD website's Platforms page.
Source Roadmap:
| Directory | Description |
|---|---|
| bin | System/user commands. |
| cddl | Various commands and libraries under the Common Development and Distribution License. |
| contrib | Packages contributed by 3rd parties. |
| crypto | Cryptography stuff (see crypto/README). |
| etc | Template files for /etc. |
| gnu | Commands and libraries under the GNU General Public License (GPL) or Lesser General Public License (LGPL). Please see gnu/COPYING and gnu/COPYING.LIB for more information. |
| include | System include files. |
| kerberos5 | Kerberos5 (Heimdal) package. |
| lib | System libraries. |
| libexec | System daemons. |
| release | Release building Makefile & associated tools. |
| rescue | Build system for statically linked /rescue utilities. |
| sbin | System commands. |
| secure | Cryptographic libraries and commands. |
| share | Shared resources. |
| stand | Boot loader sources. |
| sys | Kernel sources (see sys/README.md). |
| targets | Support for experimental DIRDEPS_BUILD |
| tests | Regression tests which can be run by Kyua. See tests/README for additional information. |
| tools | Utilities for regression testing and miscellaneous tasks. |
| usr.bin | User commands. |
| usr.sbin | System administration commands. |
For information on synchronizing your source tree with one or more of the FreeBSD Project's development branches, please see FreeBSD Handbook.