tree-wide: remove Emacs lines from all files This should be handled fine now by .dir-locals.el, so need to carry that stuff in every file.

util-lib: split our string related calls from util.[ch] into its own file string-util.[ch] There are more than enough calls doing string manipulations to deserve its own files, hence do something about it. This patch also sorts the #include blocks of all files that needed to be updated, according to the sorting suggestions from CODING_STYLE. Since pretty much every file needs our string manipulation functions this effectively means that most files have sorted #include blocks now. Also touches a few unrelated include files.

document ability to disable MACAddressPolicy While it is currently possible to either not set MACAddressPolicy or set it to a value different from "persistent" or "random", it is not obvious that a user can do so. Add a policy, "none", which simply retains kernel MAC addresses (same as not filling in the policy at all) and document it so that users are aware of this setting. Signed-off-by: Jacob Keller <jacob.keller@gmail.com>

udev: link-config - fix corruption The parser used for MTU and Speed expects them to be size_t, not unsigned int. This caused a corruption in the rest of the structure. Reported by David O Neill <david.m.oneill@intel.com>.

remove unused includes This patch removes includes that are not used. The removals were found with include-what-you-use which checks if any of the symbols from a header is in use.

net: support globbing and disjunction in Match logic Match{Name,OrginalName,Type,Driver,Path} can now take a space-separated glob of matches.

udev: net_setup - allow matching on OriginalName= This has been requested repeatedly, so let's give it a go. We explicitly do not allow matching on names that have already been changed (from a previous udev run, or otherwise), and matching on unpredictable names (ethX) is discouraged (but not currently disallowed). We also currently allow: [Match] Name=veth0 [Link] Name=my-name0 SomeOtherSetting=true Which means that the link file will be applied the first time it is invoked, but not on subsequent invocations, which may be surprising.

shared: rename condition-util.[ch] to condition.[ch] Now that we only have one file with condition implementations around, we can drop the -util suffix and simplify things a bit.

udev: link_setup - respect kernel name assign policy Newer kernels export meta-information about the origin of an ifname. Respect this from the ifname rename logic. We do not rename any interfaces that was originally named by userspace, nor once which have already been renamed from userspace. Moreover, we optionally do not (the default) rename interfaces which the kernel claims to have named in a predictable way.

udev - link-setup - expose ID_NET_DRIVER This is the same as shown by 'ethtool -i <ifname>', and is sometimes set even though DRIVER is not.

.network/.netdev/.link: allow to match on architecture

network/link: Match - filter on kernel cmdline, host and virt

udev: net-config - allow interface names to be set from the hwdb

conf-parser: distinguish between multiple sections with the same name Pass on the line on which a section was decleared to the parsers, so they can distinguish between multiple sections (if they chose to). Currently no parsers take advantage of this, but a follow-up patch will do that to distinguish [Address] Address=192.168.0.1/24 Label=one [Address] Address=192.168.0.2/24 Label=two from [Address] Address=192.168.0.1/24 Label=one Address=192.168.0.2/24 Label=two

udev: net_setup_link - don't use Description as Alias Use Description only internally, and allow Alias to be set as a separate option. For instance SNMP uses ifalias for a specific purpose, so let's not write to it by default.

net-config: start split out matching and parsing logic Move this to src/share/net-util.c, so it can be used elsewhere.

udev: link-config - let udevd set the ifname

udev: link-config - add proper parsing

udev: link-config - add mac address policy This introduces a new key MACAddressPolicy. The possible policies are 'persistent' and 'random'. 'persistent' will do nothing if the current address is the hardware address, but if the hardware does not have an address (or another address is set for whatever reason), we will generate an address which will be random, but persistent between boots (based on machineid and persistent netif name). 'random' will do nothing if the kernel already set a random address, otherwise it will generate a random one and use that instead. This patch sets MACAddressPolicy=persistent in the default .link file.

udev: link-config - move naming policy from udev rules This introduces a new key NamePolicy, which takes an ordered list of naming policies. The first successful one is applide. If all fail the value of Name (if any) is used. The possible policies are 'onboard', 'slot', 'path' and 'mac'. This patch introduces a default link file, which replaces the equivalent udev rule.

udev: link-config: add rtnl support This adds support for setting the mac address, name and mtu. Example: [Link] MTU=1450 MACAddress=98:76:54:32:10:ab Name=wireless0

udev: link-config: add ethtool support This adds support for setting the link speed, duplex and WakeOnLan settings. Example: [Link] SpeedMBytes=100 Duplex=half WakeOnLan=magic

udev: add network link configuration tool This tool applies hardware specific settings to network devices before they are announced via libudev. Settings that will probably eventually be supported are MTU, Speed, DuplexMode, WakeOnLan, MACAddress, MACAddressPolicy (e.g., 'hardware', 'synthetic' or 'random'), Name and NamePolicy (replacing our current interface naming logic). This patch only introduces support for Description, as a proof of concept. Some of these settings may later be overriden by a network management daemon/script. However, these tools should always listen and wait on libudev before touching a device (listening on netlink is not enough). This is no different from how things used to be, as we always supported changing the network interface name from udev rules, which does not work if someone has already started using it. The tool is configured by .link files in /etc/net/links/ (with the usual overriding logic in /run and /lib). The first (in lexicographical order) matching .link file is applied to a given device, and all others are ignored. The .link files contain a [Match] section with (currently) the keys MACAddress, Driver, Type (see DEVTYPE in udevadm info) and Path (this matches on the stable device path as exposed as ID_PATH, and not the unstable DEVPATH). A .link file matches a given device if all of the specified keys do. Currently the keys are treated as plain strings, but some limited globbing may later be added to the keys where it makes sense. Example: /etc/net/links/50-wireless.link [Match] MACAddress=98:f2:e4:42:c6:92 Path=pci-0000:02:00.0-bcma-0 Type=wlan [Link] Description=The wireless link