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2016-06-16Merge pull request #3481 from poettering/relative-memcgLennart Poettering
various changes, most importantly regarding memory metrics
2016-06-15load-fragment: ignore ENOTDIR/EACCES errors (#3510)Zbigniew Jędrzejewski-Szmek
If for whatever reason the file system is "corrupted", we want to be resilient and ignore the error, as long as we can load the units from a different place. Arch bug https://bugs.archlinux.org/task/49547. A user had an ntfs symlink (essentially a file) instead of a directory after restoring from backup. We should just ignore that like we would treat a missing directory, for general resiliency. We should treat permission errors similarly. For example an unreadable /usr/local/lib directory would prevent (user) instances of systemd from loading any units. It seems better to continue.
2016-06-14systemctl: allow percent-based MemoryLimit= settings via systemctl set-propertyLennart Poettering
The unit files already accept relative, percent-based memory limit specification, let's make sure "systemctl set-property" support this too. Since we want the physical memory size of the destination machine to apply we pass the percentage in a new set of properties that only exist for this purpose, and can only be set.
2016-06-14util-lib: introduce parse_percent() for parsing percent specificationsLennart Poettering
And port a couple of users over to it.
2016-06-13core: improve seccomp syscall grouping a bitLennart Poettering
This adds three new seccomp syscall groups: @keyring for kernel keyring access, @cpu-emulation for CPU emulation features, for exampe vm86() for dosemu and suchlike, and @debug for ptrace() and related calls. Also, the @clock group is updated with more syscalls that alter the system clock. capset() is added to @privileged, and pciconfig_iobase() is added to @raw-io. Finally, @obsolete is a cleaned up. A number of syscalls that never existed on Linux and have no number assigned on any architecture are removed, as they only exist in the man pages and other operating sytems, but not in code at all. create_module() is moved from @module to @obsolete, as it is an obsolete system call. mem_getpolicy() is removed from the @obsolete list, as it is not obsolete, but simply a NUMA API.
2016-06-09networkd: clean up vlan handling a bit (#3478)Lennart Poettering
Let's add a generic parser for VLAN ids, which should become handy as preparation for PR #3428. Let's also make sure we use uint16_t for the vlan ID type everywhere, and that validity checks are already applied at the time of parsing, and not only whne we about to prepare a netdev. Also, establish a common definition VLANID_INVALID we can use for non-initialized VLAN id fields.
2016-06-09bus_util: add support to map double (#3479)Susant Sahani
Now we don't support parsing double at map_basic. when trying to use bus_message_map_all_properties with a double this fails. Let's add it.
2016-06-04Merge pull request #3392 from poettering/assorted-stuffZbigniew Jędrzejewski-Szmek
Assorted stuff
2016-06-03core: Restrict mmap and mprotect with PAGE_WRITE|PAGE_EXEC (#3319) (#3379)Topi Miettinen
New exec boolean MemoryDenyWriteExecute, when set, installs a seccomp filter to reject mmap(2) with PAGE_WRITE|PAGE_EXEC and mprotect(2) with PAGE_EXEC.
2016-06-03core: always use "infinity" for no upper limit instead of "max" (#3417)Tejun Heo
Recently added cgroup unified hierarchy support uses "max" in configurations for no upper limit. While consistent with what the kernel uses for no upper limit, it is inconsistent with what systemd uses for other controllers such as memory or pids. There's no point in introducing another term. Update cgroup unified hierarchy support so that "infinity" is the only term that systemd uses for no upper limit.
2016-06-01core: add pre-defined syscall groups to SystemCallFilter= (#3053) (#3157)Topi Miettinen
Implement sets of system calls to help constructing system call filters. A set starts with '@' to distinguish from a system call. Closes: #3053, #3157
2016-05-30pager: don't start pager if the terminal is explicitly set to TERM=dumbLennart Poettering
As suggested here: https://bugs.freedesktop.org/show_bug.cgi?id=64737#c8 This adds a new call terminal_is_dumb() and makes use of this where appropriate.
2016-05-30tree-wide: check colors_enabled() before outputting ANSI color stringsLennart Poettering
2016-05-27core: add cgroup memory controller support on the unified hierarchy (#3315)Tejun Heo
On the unified hierarchy, memory controller implements three control knobs - low, high and max which enables more useable and versatile control over memory usage. This patch implements support for the three control knobs. * MemoryLow, MemoryHigh and MemoryMax are added for memory.low, memory.high and memory.max, respectively. * As all absolute limits on the unified hierarchy use "max" for no limit, make memory limit parse functions accept "max" in addition to "infinity" and document "max" for the new knobs. * Implement compatibility translation between MemoryMax and MemoryLimit. v2: - Fixed missing else's in config_parse_memory_limit(). - Fixed missing newline when writing out drop-ins. - Coding style updates to use "val > 0" instead of "val". - Minor updates to documentation.
2016-05-26{machine,system}ctl: always pass &changes and &n_changes (#3350)Christian Hesse
We have to pass addresses of changes and n_changes to bus_deserialize_and_dump_unit_file_changes(). Otherwise we are hit by missing information (subsequent calls to unit_file_changes_add() to not add anything). Also prevent null pointer dereference in bus_deserialize_and_dump_unit_file_changes() by asserting. Fixes #3339
2016-05-20Merge pull request #3290 from htejun/cgroup2-io-compatLennart Poettering
Implement compat translation between IO* and BlockIO* settings
2016-05-20Make the fix for net/if.h fuckup even worse (#3287)Zbigniew Jędrzejewski-Szmek
The original conflict is fixed in the kernel in v4.6-rc7-40-g4a91cb61bb, but now our work-around causes a compilation failure. Keep the workaround to support 4.5 kernels for now, and layer more ugliness on top. Tested with: kernel-headers-4.6.0-1.fc25.x86_64 glibc-devel-2.23.90-18.fc25.x86_64 kernel-headers-4.5.4-300.fc24.x86_64 glibc-devel-2.23.1-7.fc24.x86_64 kernel-headers-4.4.9-300.fc23.x86_64 glibc-devel-2.22-16.fc23.x86_64 kernel-headers-4.1.13-100.fc21.x86_64 glibc-devel-2.20-8.fc21.x86_64
2016-05-20core/dbus: expose SELinuxContext property (#3284)Jonathan Boulle
Adds support to core for systemd D-Bus clients to send the `SELinuxContext` property . This means `systemd-run -p SELinuxContext=foo` should now work.
2016-05-18core: introduce CGroupIOLimitType enumsTejun Heo
Currently, there are two cgroup IO limits, bandwidth max for read and write, and they are hard-coded in various places. This is fine for two limits but IO is expected to grow more limits - low, high and max limits for bandwidth and IOPS - and hard-coding each limit won't make sense. This patch replaces hard-coded limits with an array indexed by CGroupIOLimitType and accompanying string and default value tables so that new limits can be added trivially.
2016-05-16Merge pull request #3193 from htejun/cgroup-io-controllerLennart Poettering
core: add io controller support on the unified hierarchy
2016-05-12Create initrd-root-device.target synchronization point (#3239)Daniel Drake
Add a synchronization point so that custom initramfs units can run after the root device becomes available, before it is fsck'd and mounted. This is useful for custom initramfs units that may modify the root disk partition table, where the root device is not known in advance (it's dynamically selected by the generators).
2016-05-10Merge pull request #3220 from keszybz/install-fixesLennart Poettering
Fix "preset-all" with dangling symlinks and install-section hint emitted too eagerly
2016-05-09tree-wide: rename draw_special_char to special_glyphZbigniew Jędrzejewski-Szmek
That function doesn't draw anything on it's own, just returns a string, which sometimes is more than one character. Also remove "DRAW_" prefix from character names, TREE_* and ARROW and BLACK_CIRCLE are unambigous on their own, don't draw anything, and are always used as an argument to special_glyph(). Rename "DASH" to "MDASH", as there's more than one type of dash.
2016-05-09shared/install: use "→" instead of "pointing to" for a symlinkZbigniew Jędrzejewski-Szmek
It's quite a bit shorter and just as readable. (The full sentence with "pointing to" was added to replace a text that used "ln -s %s %s". Using the "ln" syntax is indeed unclear, because it's not obvious which is the source and which is the target, and because symlink(2) uses the opposite order to ln(1). But with the unicode arrow there should be no ambiguity.)
2016-05-09shared/install: do not print warning when a unit is already enabledZbigniew Jędrzejewski-Szmek
Executing 'systemctl enable' on the same unit twice would cause a warning about a missing [Install] section to be printed. To avoid this, count all symlinks that "would" be created, and return 1 no matter if we actually created a symlink or skipped creation because it already exists.
2016-05-09shared/install: handle dangling aliases as an explicit case, report nicelyZbigniew Jędrzejewski-Szmek
This fixes 'preset-all' with a unit that is a dangling symlink. $ systemctl --root=/ preset-all Unit syslog.service is an alias to a unit that is not present, ignoring. Unit auditd.service is masked, ignoring. Unit NetworkManager.service is masked, ignoring.
2016-05-09shared/install: add some more debug messages and commentsZbigniew Jędrzejewski-Szmek
$ systemctl --root=/ preset foobar.service Cannot find unit foobar.service. Failed to preset: No such file or directory. $ systemctl --root=/ preset foobar@.service Cannot find unit foobar@.service. Failed to preset: No such file or directory. $ systemctl --root=/ preset foobar@blah.service Cannot find unit foobar@blah.service or foobar@.service. Failed to preset: No such file or directory.
2016-05-09tree-wide: port more code to use ifname_valid()Lennart Poettering
2016-05-07shared/install: simplify error handling conditionals in a few placesZbigniew Jędrzejewski-Szmek
2016-05-07Merge pull request #3160 from htejun/cgroup-fixes-rev2Zbigniew Jędrzejewski-Szmek
Cgroup fixes.
2016-05-05core: add io controller support on the unified hierarchyTejun Heo
On the unified hierarchy, blkio controller is renamed to io and the interface is changed significantly. * blkio.weight and blkio.weight_device are consolidated into io.weight which uses the standardized weight range [1, 10000] with 100 as the default value. * blkio.throttle.{read|write}_{bps|iops}_device are consolidated into io.max. Expansion of throttling features is being worked on to support work-conserving absolute limits (io.low and io.high). * All stats are consolidated into io.stats. This patchset adds support for the new interface. As the interface has been revamped and new features are expected to be added, it seems best to treat it as a separate controller rather than trying to expand the blkio settings although we might add automatic translation if only blkio settings are specified. * io.weight handling is mostly identical to blkio.weight[_device] handling except that the weight range is different. * Both read and write bandwidth settings are consolidated into CGroupIODeviceLimit which describes all limits applicable to the device. This makes it less painful to add new limits. * "max" can be used to specify the maximum limit which is equivalent to no config for max limits and treated as such. If a given CGroupIODeviceLimit doesn't contain any non-default configs, the config struct is discarded once the no limit config is applied to cgroup. * lookup_blkio_device() is renamed to lookup_block_device(). Signed-off-by: Tejun Heo <htejun@fb.com>
2016-05-05tree-wide: introduce new SOCKADDR_UN_LEN() macro, and use it everywhereLennart Poettering
The macro determines the right length of a AF_UNIX "struct sockaddr_un" to pass to connect() or bind(). It automatically figures out if the socket refers to an abstract namespace socket, or a socket in the file system, and properly handles the full length of the path field. This macro is not only safer, but also simpler to use, than the usual offsetof() + strlen() logic.
2016-05-04core: fix segfault on "systemctl --set-property UNIT BlockIODeviceWeight=WEIGHT"Tejun Heo
bus_append_unit_property_assignment() was missing an argument for sd_bus_message_append() when processing BlockIODeviceWeight leading to segfault. Fix it. Signed-off-by: Tejun Heo <htejun@fb.com>
2016-05-04treewide: fix typos (#3187)Torstein Husebø
2016-05-03Merge pull request #3183 from crawford/preset-arrayZbigniew Jędrzejewski-Szmek
install: cache the presets before evaluating
2016-05-03install: cache the presets before evaluatingAlex Crawford
The previous implementation traversed the various config directories, walking the preset files and parsing each line to determine if a service should be enabled or disabled. It did this for every service which resulted in many more file operations than neccessary. This approach parses each of the preset entries into an array which is then used to check if each service should be enabled or disabled.
2016-05-02Merge pull request #3162 from keszybz/alias-refusalLennart Poettering
Refuse Alias, DefaultInstance, templated units in install (as appropriate)
2016-05-02machined: support non-btrfs file systems with "machinectl clone"Lennart Poettering
Fall back to a normal copy operation when the backing file system isn't btrfs, and hence doesn't support cheap snapshotting. Of course, this will be slow, but given that the execution is asynchronous now, this should be OK. Fixes: #1308
2016-05-02tree-wide: fix invocations of chattr_path()Lennart Poettering
chattr_path() takes two bitmasks, and no booleans. Fix the various invocations to do this properly.
2016-05-02image: enable btrfs quotas on the clone destination, not the sourceLennart Poettering
2016-05-01shared/install: refuse template files for non-templateable unitsZbigniew Jędrzejewski-Szmek
$ systemctl --root=/ enable templated@bar.mount Unit type mount cannot be templated. Failed to enable: Invalid argument.
2016-05-01shared/install: warn about DefaultInstance in non-template unitsZbigniew Jędrzejewski-Szmek
[/etc/systemd/system/mnt-test.mount:6] DefaultInstance only makes sense for template units, ignoring.
2016-05-01Move no_instances information to shared/Zbigniew Jędrzejewski-Szmek
This way it can be used in install.c in subsequent commit.
2016-05-01shared/install: ignore Alias in [Install] of units which don't allow aliasesZbigniew Jędrzejewski-Szmek
A downside is that a warning about missing [Install] is printed: $ systemctl --root=/ enable mnt-test.mount [/etc/systemd/system/mnt-test.mount:5] Aliases are not allowed for mount units, ignoring. The unit files have no installation config (WantedBy, RequiredBy, Also, Alias settings in the [Install] section, and DefaultInstance for template units). This means they are not meant to be enabled using systemctl. Possible reasons for having this kind of units are: 1) A unit may be statically enabled by being symlinked from another unit's .wants/ or .requires/ directory. 2) A unit's purpose may be to act as a helper for some other unit which has a requirement dependency on it. 3) A unit may be started when needed via activation (socket, path, timer, D-Bus, udev, scripted systemctl call, ...). 4) In case of template units, the unit is meant to be enabled with some instance name specified. That's a bit misleading, but I don't see an easy way to fix this. But the situation is similar for many other parsing errors, so maybe that's OK.
2016-05-01Move no_alias information to shared/Zbigniew Jędrzejewski-Szmek
This way it can be used in install.c in subsequent commit.
2016-04-30core: bus_append_unit_property_assignment() was using the wrong parse functionTejun Heo
It was incorrectly using cg_cpu_weight_parse() to parse BlockIOWeight. Update it to use cg_blkio_weight_parse() instead. Signed-off-by: Tejun Heo <htejun@fb.com>
2016-04-29core: Filter by unit name behind the D-Bus, instead on the client side (#3142)kayrus
This commit improves systemd performance on the systems which have thousands of units.
2016-04-28install: upgrade message to a warningAlex Crawford
2016-04-28tree-wide: rename hidden_file to hidden_or_backup_file and optimizeZbigniew Jędrzejewski-Szmek
In standard linux parlance, "hidden" usually means that the file name starts with ".", and nothing else. Rename the function to convey what the function does better to casual readers. Stop exposing hidden_file_allow_backup which is rather ugly and rewrite hidden_file to extract the suffix first. Note that hidden_file_allow_backup excluded files with "~" at the end, which is quite confusing. Let's get rid of it before it gets used in the wrong place.
2016-04-26journal: when dumping journal contents, react nicer to lines we can't readLennart Poettering
If journal files are not cleanly closed it might happen that intermediaery journal entries cannot be read. Handle this nicely, skip over the unreadable entries, and log a debug message about it; after all we generally follow the logic that we try to make the best of corrupted files.