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This expands the role of fallback servers so they are applied not only
when there are no dns servers configured, but when all the configured
dns servers are configured only for non-default-route links.
This commit may have been a breaking change for sd-resolved foreign
resolv.conf mode, where a legacy network management daemon directly
modifies resolv.conf and sd-resolved consumes that.
This reverts commit eded61e410.
In some kernels (specifically, 5.4) even though the clone3 syscall is
supported, setting CLONE_INTO_CGROUP is not. The error message returned
in this case is E2BIG.
If posix_spawn_wrapper encounters this error, it does not retry, and
cannot spawn any programs in said kernels.
This commit adds a check for the E2BIG error and retries pidfd_spawn()
without the POSIX_SPAWN_SETCGROUP flag.
If we encounter an E2BIG error, and the pidfd_spawn() succeeds after
removing the POSIX_SPAWN_SETCGROUP flag, then we cache the result so
that we do not retry every time.
Originally, this issue was reported in https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1077204.
Signed-off-by: Kornilios Kourtis <kornilios@gmail.com>
That indicates the interface name in 'iif' or 'oif' cannot be resolved
when 'ip rule' command is invoked. That's natural when networkd fail to
remove rule but the corresponding interface is already removed.
To make not the residual rules interfere subsequent test cases, let's
ignore the flag and actually remove unwanted rules.
Currently, these attributes are not configured by us, but there may be a
existing rule created by user manually with one of these attribute.
To correctly manage such foreign rules, let's read these attributes.
The kernel does not distinguish rules with different flags in
rule_exists(), but the flags of an existing rule cannot be updated.
Let's remove rules that have conflicting flags, and configure new rules
later with requested flags.
When we fail to remove a rule, that mostly means the rule does not exist
in the kernel anymore, e.g. already removed manually and we have not
received notification about that yet.
Let's detach the rule in that case.
Otherwise, if we fail to configure the rule, then the manager will keep
nonexistent rule forever. So, let's first copy the rule and put it on
Request, then on success generate a new copy based on the netlink
notification and store it to Manager.
This is the same as 0a0c2672db, but for
routing policy rule.
If it is already requested, the new request will be anyway silently refused by
link_queue_request_safe(), which returns 0 in such case. Let's return earlier.
There should be no functional change, just refactoring.
They are stored in Manager.rules set or Network.rules_by_section hashmap.
For safety, let's not edit them even temporarily.
No functional change, just refactoring.
being connected to a TTY is not really enough to determine
interactivity in many cases. Let's also check if we have a controlling
TTY.
Inspired by #34016
This will greatly reduce the number of cases where the global unicast
scope overlaps with link scopes configured as default-route, making it
feasible to use the global DNS setting in conjunction with per-link dns
servers configured by the network.
This change is preferred over demoting links to default-route=no where
the user prefers to use the network provided DNS servers, and I expect
it is non-disruptive in that it should not degrade the efficacy of any
existing configuration.
let's instead generate ENOTTY on our own. This is more correct with out
coding style (since we generally do not propagate errors via errno), and
also addresses #34039 as side effect. (#34039 really needs to be fixed
in musl though, too, this is just a work-around as side-effect).
Fixes: #34039
glibc returs EIO on ttys that are hung up. That's not really correct,
POSIX seems to disagree.
Work around this in our code, and turn this into a clean "1", since a
hung up tty doesn't stop being a tty just because it is hung up.
Background: https://github.com/systemd/systemd/pull/34039
In apply_one_mount(), in the MOUNT_EXTENSION_DIRECTORY case,
char **extension_release was used as a return pointer twice but only
cleaned up once in the end. Fix it by removing duplicate code that
was causing this issue.
Fixes issue introduced in 55ea4ef096.
Currently, only FIB_RULE_INVERT flag can be configurable, but for
simplicity and future extension, let's manage all flags.
No functional change, just refactoring.
The kernel parses FRA_SUPPRESS_PREFIXLEN as uint32_t, but internally
handled as signed integer and negative values as unset. Let's explicitly
specify the size of the variable.
No functional change, just refactoring.
