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2015-10-22machinectl: accept "none" and "infinity" as specifier when dropping quotas ↵Lennart Poettering
using "machinectl set-limit" Previously, we already accepted "-" as special value for dropping limits. Add "infinity", as that's what we support for RLIMITs and hence should support here to. Also add "none" as that's what the btrfs tools use.
2015-10-22btrfs: beef-up btrfs support with a limited understanding of quotaLennart Poettering
With this change we understand more than just leaf quota groups for btrfs file systems. Specifically: - When we create a subvolume we can now optionally add the new subvolume to all qgroups its parent subvolume was member of too. Alternatively it is also possible to insert an intermediary quota group between the parent's qgroups and the subvolume's leaf qgroup, which is useful for a concept of "subtree" qgroups, that contain a subvolume and all its children. - The remove logic for subvolumes has been updated to optionally remove any leaf qgroups or "subtree" qgroups, following the logic above. - The snapshot logic for subvolumes has been updated to replicate the original qgroup setup of the source, if it follows the "subtree" design described above. It will not cover qgroup setups that introduce arbitrary qgroups, especially those orthogonal to the subvolume hierarchy. This also tries to be more graceful when setting up /var/lib/machines as btrfs. For example, if mkfs.btrfs is missing we don't even try to set it up as loopback device. Fixes #1559 Fixes #1129
2015-10-08machined: when opening a shell via machined, pass tty fds inLennart Poettering
With this change we'll open the shell's tty right from machined and then pass it to the transient unit we create. This way we make sure the pty is opened exactly as long as the transient service is around, and no longer, and vice versa. This way pty forwarders do not have to deal with EIO problems due to vhangup, as the pty is open all the time from the point we set things up to the point where the service goes away.
2015-10-08basic: move two more terminal-related calls into terminal-util.[ch]Lennart Poettering
2015-10-07machinectl: fix race when opening new shells with "machinectl shell"Lennart Poettering
Previously, we'd allocate the TTY, spawn a service on it, but immediately start processing the TTY and forwarding it to whatever the commnd was started on. This is however problematic, as the TTY might get actually opened only much later by the service. We'll hence first get EIOs on the master as the other side is still closed, and hence considered it hung up and terminated the session. With this change we add a flag to the pty forwarding logic: PTY_FORWARD_IGNORE_INITIAL_VHANGUP. If set, we'll ignore all hangups (i.e. EIOs) on the master PTY until the first byte is successfully read. From that point on we consider a hangup/EIO a regular connection termination. This way, we handle the race: when we get EIO initially we'll ignore it, until the connection is properly set up, at which time we start honouring it.
2015-09-29bus-util: rename bus_open_transport() to bus_connect_transport()Lennart Poettering
In sd-bus, the sd_bus_open_xyz() family of calls allocates a new bus, while sd_bus_default_xyz() family tries to reuse the thread's default bus. bus_open_transport() sometimes internally uses the former, sometimes the latter family, but suggests it only calls the former via its name. Hence, let's avoid this confusion, and generically rename the call to bus_connect_transport(). Similar for all related calls. And while we are at it, also change cgls + cgtop to do direct systemd connections where possible, since all they do is talk to systemd itself.
2015-09-29core: allow setting WorkingDirectory= to the special value ~Lennart Poettering
If set to ~ the working directory is set to the home directory of the user configured in User=. This change also exposes the existing switch for the working directory that allowed making missing working directories non-fatal. This also changes "machinectl shell" to make use of this to ensure that the invoked shell is by default in the user's home directory. Fixes #1268.
2015-09-29util: introduce common version() implementation and use it everywhereLennart Poettering
This also allows us to drop build.h from a ton of files, hence do so. Since we touched the #includes of those files, let's order them properly according to CODING_STYLE.
2015-09-22Merge pull request #1335 from poettering/some-fixesDaniel Mack
A variety of mostly unrelated fixes
2015-09-22util: drop UID_IS_INVALID() in favour of uid_is_valid()Lennart Poettering
No need to keep both functions, settle on uid_is_valid() for everything.
2015-09-22cgtop: underline table headerLennart Poettering
Let's underline the header line of the table shown by cgtop, how it is customary for tables. In order to do this, let's introduce new ANSI underline macros, and clean up the existing ones as side effect.
2015-09-22nspawn, machined: fix comments and error messagesKrzesimir Nowak
A bunch of "Client -> Child" fixes and one barrier-enumerator fix. (David: rebased on master)
2015-09-10tree-wide: never use the off_t unless glibc makes us use itLennart Poettering
off_t is a really weird type as it is usually 64bit these days (at least in sane programs), but could theoretically be 32bit. We don't support off_t as 32bit builds though, but still constantly deal with safely converting from off_t to other types and back for no point. Hence, never use the type anymore. Always use uint64_t instead. This has various benefits, including that we can expose these values directly as D-Bus properties, and also that the values parse the same in all cases.
2015-09-09tree-wide: drop {} from one-line if blocksLennart Poettering
Patch via coccinelle.
2015-09-09tree-wide: use coccinelle to patch a lot of code to use mfree()Lennart Poettering
This replaces this: free(p); p = NULL; by this: p = mfree(p); Change generated using coccinelle. Semantic patch is added to the sources.
2015-09-07machined: improve error message when trying to get a bus in bus-less containersLennart Poettering
Now that we get useful error messages from sd-bus for container connections, let's make use of this and report better errors back to machined clients. Fixes #685.
2015-09-07Merge pull request #1165 from poettering/nspawn-filesTom Gundersen
various fixes to the core, logind, machined, nspawn
2015-09-05machine: make sure to call unlockpt() even for local host pty connectionsLennart Poettering
This fixes breakage for local host pty handling, introduced in 395745ba533ac91fe118f43ec83f13a752c0b473. Fixes #1139
2015-09-06bus-util: support details in CheckAuthorization callsMichael Chapman
Extra details for an action can be supplied when calling polkit's CheckAuthorization method. Details are a list of key/value string pairs. Custom policy can use these details when making authorization decisions.
2015-09-01machined: introduce a ptsname_namespace() call and make use of itLennart Poettering
The call is like ptsname() but does not assume the pty path was accessible in the local namespace. It uses the same internal ioctl though.
2015-09-01machined: call unlockpt() in container, not hostLennart Poettering
It makes assumptions about the pty path, hence better call it in the container namespace rather than the host.
2015-09-01cgroup: drop "ignore_self" argument from cg_is_empty()Lennart Poettering
In all cases where the function (or cg_is_empty_recursive()) ignoring the calling process is actually wrong, as a process keeps a cgroup busy regardless if its the current one or another. Hence, let's simplify things and drop the "ignore_self" parameter.
2015-08-28core: add unit_dbus_interface_from_type() to unit-name.hLennart Poettering
Let's add a way to get the type-specific D-Bus interface of a unit from either its type or name to src/basic/unit-name.[ch]. That way we can share it with the client side, where it is useful in tools like cgls or machinectl. Also ports over machinectl to make use of this.
2015-08-26machinectl: pass $TERM into "machinectl shell" sessionsLennart Poettering
2015-08-25machinectl: remove unused variableThomas Hindoe Paaboel Andersen
2015-08-25machine: policykit string fixesLennart Poettering
2015-08-24machinectl: extend the "shell" syntax to take user@container namesLennart Poettering
In order to make "machinectl shell" more similar to ssh, allow the following syntax to connect to a container under a specific username: machinectl shell lennart@fedora Also beefs up related man page documentation.
2015-08-24machinectl: make machine name parameters for "shell" and "login" optionalLennart Poettering
If no machine name is specified, imply that we connect to ".host", i.e. the local host.
2015-08-24machined: beef up PolicyKit actionsLennart Poettering
Introduce separate actions for creating login or shell sessions for the local host or a local container. By default allow local unprivileged clients to create new login sessions (which is safe, since getty will ask for username and authentication). Also, imply login privs from shell privs, as well as shell and login privs from manage privs.
2015-08-24machined: userns is only supported for container-class machinesLennart Poettering
We do not support userns for VM machines or for the host itself.
2015-08-24machinectl: don't show ".host" pseudo-machine in list by defaultLennart Poettering
Let's hide all machines whose name begins with "." by default, thus hiding the ".host" pseudo-machine, unless --all is specified. This takes inspiration from the ".host" image handling in "machinectl list-images" which also hides all images whose name starts with ".".
2015-08-24machined: introduce pseudo-machine ".host" refererring to the host systemLennart Poettering
Some of the operations machined/machinectl implement are also very useful when applied to the host system (such as machinectl login, machinectl shell or machinectl status), hence introduce a pseudo-machine by the name of ".host" in machined that refers to the host system, and may be used top execute operations on the host system with. This copies the pseudo-image ".host" machined already implements for image related commands. (This commit also adds a PK privilege for opening a PTY in a container, which was previously not accessible for non-root.)
2015-08-24machined: validate machine names at more placesLennart Poettering
When enumerating machines from /run, and when accepting machine names for operations, be more strict and always validate. Note that these checks are strictly speaking unnecessary, since enumeration happens only on the trusted /run...
2015-08-24util: make machine_name_is_valid() a macro and move it to hostname-util.hLennart Poettering
As it turns out machine_name_is_valid() does the exact same thing as hostname_is_valid() these days, as it just invoked that and checked the name length was < 64. However, hostname_is_valid() checks the length against HOST_NAME_MAX anyway (which is 64 on Linux), hence any additional check is redundant. We hence replace machine_name_is_valid() by a macro that simply maps it to hostname_is_valid() but sets the allow_trailing_dot parameter to false. We also move this this call to hostname-util.h, to the same place as the hostname_is_valid() declaration.
2015-08-24machined: always look for leader PID firstLennart Poettering
When looking for the machine belonging to a PID, always look for the leader first, only then fall back to a cgroup check. We keep direct track of the leader PID, but only indirectly of the cgroup, hence prefer the PID.
2015-08-24machinectl: add new "machinectl shell" commandLennart Poettering
This makes use of machined's new OpenShell() command and allows opening a new interactive shell in any container.
2015-08-24machined: add new OpenShell() bus callLennart Poettering
This new bus call opens an interactive shell in a container. It works like the existing OpenLogin() call, but does not involve getty, and instead opens an arbitrary command line. This is similar to "systemd-run -t -M" but is controlled by a specific PolicyKit privilege.
2015-08-17Merge pull request #977 from richardmaw-codethink/machinectl-userns-login-v2Lennart Poettering
Fix machinectl login with containers in user namespaces (v2)
2015-08-17namespace helpers: Allow entering a UID namespaceRichard Maw
To be able to use `systemd-run` or `machinectl login` on a container that is in a private user namespace, the sub-process must have entered the user namespace before connecting to the container's D-Bus, otherwise the UID and GID in the peer credentials are garbage. So we extend namespace_open and namespace_enter to support UID namespaces, and we enter the UID namespace in bus_container_connect_{socket,kernel}. namespace_open will degrade to a no-op if user namespaces are not enabled in the kernel. Special handling is required for the setns call in namespace_enter with a user namespace, since transitioning to your own namespace is forbidden, as it would result in re-entering your user namespace as root. Arguably it may be valid to check this at the call site, rather than inside namespace_enter, but it is less code to do it inside, and if the intention of calling namespace_enter is to *be* in the target namespace, rather than to transition to the target namespace, it is a reasonable approach. The check for whether the user namespace is the same must happen before entering namespaces, as we may not be able to access /proc during the intermediate transition stage. We can't instead attempt to enter the user namespace and then ignore the failure from it being the same namespace, since the error code is not distinct, and we can't compare namespaces while mid-transition.
2015-08-17Bug #944: Deletion of unnecessary checks before a few calls of systemd functionsMarkus Elfring
The following functions return immediately if a null pointer was passed. * calendar_spec_free * link_address_free * manager_free * sd_bus_unref * sd_journal_close * udev_monitor_unref * udev_unref It is therefore not needed that a function caller repeats a corresponding check. This issue was fixed by using the software Coccinelle 1.0.1.
2015-08-06machined: rework state tracking logic for machinesLennart Poettering
This splits up the stopping logic for machines into two steps: first on machine_stop() we begin with the shutdown of a machine by queuing the stop method call for it. Then, in machine_finalize() we actually remove the rest of its runtime context. This mimics closely how sessions are handled in logind. This also reworks the GC logic to strictly check the current state of the machine unit, rather than shortcutting a few cases, like for example assuming that UnitRemoved really means a machine is gone (which it isn't since Reloading might trigger it, see #376). Fixes #376.
2015-08-06machine: drop state variable from Machine objectLennart Poettering
We never made use of it, let's get rid of it.
2015-08-06logind,machined: various smaller cleanupsLennart Poettering
Use mfree() where we can. Drop unnecessary {}. Drop unnecessary variable declarations. Cast syscall invocations where explicitly don't care for the return value to (void). Reword a comment.
2015-08-06machined,logind: don't generate errors on signal match functionsLennart Poettering
If we get a weird signal, then we should log about it, but not return an error, since sd-bus will not call us again then anymore, but for these signals we match here we actually do want to be called on the next invocation.
2015-08-04machinectl: support relative host paths in copy-{from,to}Richard Maw
2015-08-04machined: Relax path checks for Copy{From,To}Richard Maw
Absolute paths should be sufficient to prevent funny business, and while path_is_safe() checks this, it also checks whether the path contains . or .. components, which while odd, aren't a security risk.
2015-07-29tree-wide: port everything over to fflush_and_check()Lennart Poettering
Some places invoked fflush() directly with their own manual error checking, let's unify all that by using fflush_and_check(). This also unifies the general error paths of fflush()+rename() file writers.
2015-07-09nss-mymachines: map userns users of containers to real user namesLennart Poettering
Given a container "foo", that maps user id $UID to container user, using user namespaces, this NSS module extenstion will now map the $UID to a name "vu-foo-$TUID" for the translated UID $UID. Similar, userns groups are mapped to "vg-foo-$TGID" for translated GIDs of $GID. This simple change should make userns users more discoverable. Also, given that many tools like "adduser" check NSS before allocating a UID, should lower the chance of UID range conflicts between tools.
2015-07-08machine: remove unused variablesThomas Hindoe Paaboel Andersen
2015-07-08property callback returns are consistentUmut Tezduyar Lindskog
It is no different to return 0 over 1 in the property callback. It is confusing to return 1 which made me think 1 has a special purpose. This way code is consistent with the rest of the tree.