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In https://github.com/systemd/systemd/pull/4004 , a runtime detection
method for seccomp was added. However, it does not detect the case
where CONFIG_SECCOMP=y but CONFIG_SECCOMP_FILTER=n. This is possible
if the architecture does not support filtering yet.
Add a check for that case too.
While at it, change get_proc_field usage to use PR_GET_SECCOMP prctl,
as that should save a few system calls and (unnecessary) allocations.
Previously, reading of /proc/self/stat was done as recommended by
prctl(2) as safer. However, given that we need to do the prctl call
anyway, lets skip opening, reading and parsing the file.
Code for checking inspired by
https://outflux.net/teach-seccomp/autodetect.html
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fix #4080
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ethtool_sset_info adding some extra space to it.
also fix valgrind warning
```
Unloaded link configuration context.
==31690==
==31690== HEAP SUMMARY:
==31690== in use at exit: 8,192 bytes in 2 blocks
==31690== total heap usage: 431 allocs, 429 frees, 321,164 bytes allocated
==31690==
==31690== 4,096 bytes in 1 blocks are still reachable in loss record 1 of 2
==31690== at 0x4C2BBAD: malloc (vg_replace_malloc.c:299)
==31690== by 0x166B32: mempool_alloc_tile (mempool.c:62)
==31690== by 0x166BBC: mempool_alloc0_tile (mempool.c:81)
==31690== by 0x15B8FC: hashmap_base_new (hashmap.c:732)
==31690== by 0x15B9F7: internal_hashmap_new (hashmap.c:766)
==31690== by 0x151291: conf_files_list_strv_internal (conf-files.c:103)
==31690== by 0x1514BA: conf_files_list_strv (conf-files.c:135)
==31690== by 0x13A1CF: link_config_load (link-config.c:227)
==31690== by 0x135B68: builtin_net_setup_link_init
(udev-builtin-net_setup_link.c:77)
==31690== by 0x1306B3: udev_builtin_init (udev-builtin.c:57)
==31690== by 0x11E984: adm_builtin (udevadm-test-builtin.c:72)
==31690== by 0x117B4D: run_command (udevadm.c:75)
```
Fixes #4080
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Prior to this commit, users could be given an unusable command to run if
they attempted to stop or start special services. For example:
$ systemctl stop -- -.mount
Failed to stop -.mount: Operation refused, unit -.mount may be \
requested by dependency only.
See system logs and 'systemctl status -.mount' for details.
$ systemctl status -.mount
systemctl: invalid option -- '.'
This adds a '--' to the example command in these situations.
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(also: add comments about the used numbers)
Fixes: #3930
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Fixes: #4049
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Let's bump it further, as this the current limit turns out to be problematic
IRL. Let's bump it to more than twice what we know of is needed.
Fixes: #4068
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This splits the OS field in two : one for the distribution name
and one for the the version id.
Dashes are written for missing fields.
This also prints ip addresses of known machines. The `--max-addresses`
option specifies how much ip addresses we want to see. The default is 1.
When more than one address is written for a machine, a `,` follows it.
If there are more ips than `--max-addresses`, `...` follows the last
address.
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This patch allows to configure AgeingTimeSec, Priority and DefaultPVID for
bridge interfaces.
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Flushing foreign configuration for unmanaged interfaces is outright
evil, especially when it's a regular occurence with Wi-Fi.
Fixes: 3104883ddc24 "networkd: remove route if carrier is lost"
Ref: #3831
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Similar to MemoryMax=, MemorySwapMax= limits swap usage. This controls
controls "memory.swap.max" attribute in unified cgroup.
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The patch supports to configure
GenericReceiveOffload
LargeReceiveOffload
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Resolves #3534
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The patch supports to configure
GenericReceiveOffload
LargeReceiveOffload
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This patch supports these features to be on or off
Generic Segmentation Offload
TCP Segmentation Offload
UDP Segmentation Offload
fixes #432
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'continue' is a fancy no-op here – it only skips through the inner loop,
not the outer one, so entries already in BootOrder get printed twice.
This partially reverts f939cff71577 "bootctl: various coding style
updates".
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add ForceUnmount= setting for mount units
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Similar to MemoryMax=, MemorySwapMax= limits swap usage. This controls
controls "memory.swap.max" attribute in unified cgroup.
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fileio makes use of O_TMPFILE when it is available.
We now always have O_TMPFILE, defined in missing.h if missing
from the toolchain headers.
Have fileio include missing.h and drop the guards around the
use of O_TMPFILE.
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Currently, a missing __O_TMPFILE was only defined for i386 and x86_64,
leaving any other architectures with an "old" toolchain fail miserably
at build time:
src/import/export-raw.c: In function 'reflink_snapshot':
src/import/export-raw.c:271:26: error: 'O_TMPFILE' undeclared (first use in this function)
new_fd = open(d, O_TMPFILE|O_CLOEXEC|O_NOCTTY|O_RDWR, 0600);
^
__O_TMPFILE (and O_TMPFILE) are available since glibc 2.19. However, a
lot of existing toolchains are still using glibc-2.18, and some even
before that, and it is not really possible to update those toolchains.
Instead of defining it only for i386 and x86_64, define __O_TMPFILE
with the specific values for those archs where it is different from the
generic value. Use the values as found in the Linux kernel (v4.8-rc3,
current as of time of commit).
---
Note: tested on ARM (build+run), with glibc-2.18 and linux headers 3.12.
Untested on other archs, though (I have no board to test this).
Changes v1 -> v2:
- add a comment specifying some are hexa, others are octal.
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O_TMPFILE may be missing from the system headers, so use our fallback
definition.
---
Changes v1 -> v2:
- move include with local includes
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"-f" switch
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Resolves #3534
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"-l" switch (#3827)
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Minor cleanup suggested by Lennart.
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permit bus clients to pin units to avoid automatic GC
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This commit follows further on the deprecation path for --share-system,
by splitting and gating each share-able namespace behind its own
environment flag.
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When the system journal becomes re-opened post-flush with the runtime
journal open, it implies we've recovered from something like an ENOSPC
situation where the system journal rotate had failed, leaving the system
journal closed, causing the runtime journal to be opened post-flush.
For the duration of the unavailable system journal, we log to the
runtime journal. But when the system journal gets opened (space made
available, for example), we need to close the runtime journal before new
journal writes will go to the system journal. Calling
server_flush_to_var() after opening the system journal with a runtime
journal present, post-flush, achieves this while preserving the runtime
journal's contents in the system journal.
The combination of the present flushed flag file and the runtime journal
being open is a state where we should be logging to the system journal,
so it's appropriate to resume doing so once we've successfully opened
the system journal.
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Flushing foreign configuration for unmanaged interfaces is outright
evil, especially when it's a regular occurence with Wi-Fi.
Fixes: 3104883ddc24 "networkd: remove route if carrier is lost"
Ref: #3831
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functions (#4019)
Prevents discard-qualifiers warnings when the passed variable was const
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Fixes #3882
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bus_connect_transport() is exclusively used from our command line tools, hence
let's set exit-on-disconnect for all of them, making behaviour a bit nicer in
case dbus-daemon goes down.
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Old libdbus has a feature that the process is terminated whenever the the bus
connection receives a disconnect. This is pretty useful on desktop apps (where
a disconnect indicates session termination), as well as on command line apps
(where we really shouldn't stay hanging in most cases if dbus daemon goes
down).
Add a similar feature to sd-bus, but make it opt-in rather than opt-out, like
it is on libdbus. Also, if the bus is attached to an event loop just exit the
event loop rather than the the whole process.
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This tests in particular that disconnecting results in the tracking object's
handlers to be called.
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objects immediately
If the server side kicks us from the bus, from our view no names are on the bus
anymore, hence let's make sure to dispatch all tracking objects immediately.
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In order to add a name to a bus tracking object we need to do some bus
operations: we need to check if the name already exists and add match for it.
Both are synchronous bus calls. While processing those we need to make sure
that the tracking object is not dispatched yet, as it might still be empty, but
is not going to be empty for very long.
hence, block dispatching by removing the object from the dispatch queue while
adding it, and readding it on error.
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When a bus connection is closed we dispatch all reply callbacks. Do so in a new
function if its own.
No behaviour changes.
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It is useful for clients to be able to read the last CPU usage counter value of
a unit even if the unit is already terminated. Hence, before destroying a
cgroup's cgroup cache the last CPU usage counter and return it if the cgroup is
gone.
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Make sure we return proper errors for types not understood yet.
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Instead of ignoring empty strings retrieved via the bus, treat them as NULL, as
it's customary in systemd.
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Let's make sure we can read the exit code/status properties exposed by PID 1
properly. Let's reuse the existing code for unsigned fields, as we just use it
to copy words around, and don't calculate it.
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This adds two (privileged) bus calls Ref() and Unref() to the Unit interface.
The two calls may be used by clients to pin a unit into memory, so that various
runtime properties aren't flushed out by the automatic GC. This is necessary
to permit clients to race-freely acquire runtime results (such as process exit
status/code or accumulated CPU time) on successful service termination.
Ref() and Unref() are fully recursive, hence act like the usual reference
counting concept in C. Taking a reference is a privileged operation, as this
allows pinning units into memory which consumes resources.
Transient units may also gain a reference at the time of creation, via the new
AddRef property (that is only defined for transient units at the time of
creation).
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This adds an optional "recursive" counting mode to sd_bus_track. If enabled
adding the same name multiple times to an sd_bus_track object is counted
individually, so that it also has to be removed the same number of times before
it is gone again from the tracking object.
This functionality is useful for implementing local ref counted objects that
peers make take references on.
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