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That hashmap_move_one() currently cannot fail with -ENOMEM is an
implementation detail, which is not possible to guarantee in general.
Hashmap implementations based on anything else than chaining of
individual entries may have to allocate.
hashmap_move_one will not fail with -ENOMEM if a proper reservation has
been made beforehand. Use reservations in install.c.
In cgtop.c simply propagate the error instead of asserting.
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With the current hashmap implementation that uses chaining, placing a
reservation can serve two purposes:
- To optimize putting of entries if the number of entries to put is
known. The reservation allocates buckets, so later resizing can be
avoided.
- To avoid having very long bucket chains after using
hashmap_move(_one).
In an alternative hashmap implementation it will serve an additional
purpose:
- To guarantee a subsequent hashmap_move(_one) will not fail with
-ENOMEM (this never happens in the current implementation).
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Return 0 if no resize was needed, 1 if successfully resized and
negative on error.
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on_conflict_dispatch() uses hashmap_steal_first() and then does
something non-trivial with it. It may care about the order.
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The way process_closing() picks the first entry from reply_callbacks
and works with it makes it likely that it cares about the order.
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Anything that uses hashmap_next() almost certainly cares about the order
and needs to be an OrderedHashmap.
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Order matters here. It replaces oldest entries first when
USER_JOURNALS_MAX is reached.
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The order of entries may matter here. Oldest entries are evicted first
when the cache is full.
(Though I don't see anything to rejuvenate entries on cache hits.)
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It appears order may matter here. Use OrderedHashmaps to be safe.
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It's handled just fine by returning NULL.
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-ENOENT is the same return value as if 'other' were an allocated hashmap
that does not contain the key. A NULL hashmap is a possible way of
expressing a hashmap that contains no key.
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Test more corner cases and error states in several tests.
Add new tests for:
hashmap_move
hashmap_remove
hashmap_remove2
hashmap_remove_value
hashmap_remove_and_replace
hashmap_get2
hashmap_first
In test_hashmap_many additionally test with an intentionally bad hash
function.
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test-hashmap-ordered.c is generated from test-hashmap-plain.c simply by
substituting "ordered_hashmap" for "hashmap" etc.
In the cases where tests rely on the order of entries, a distinction
between plain and ordered hashmaps is made using the ORDERED macro,
which is defined only for test-hashmap-ordered.c.
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Few Hashmaps/Sets need to remember the insertion order. Most don't care
about the order when iterating. It would be possible to use more compact
hashmap storage in the latter cases.
Add OrderedHashmap as a distinct type from Hashmap, with functions
prefixed with "ordered_". For now, the functions are nothing more than
inline wrappers for plain Hashmap functions.
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new mac_{smack,selinux,apparmor}_xyz() convention
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move label apis to selinux-util.ch or smack-util.ch appropriately.
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Even when termninated normally, systemd-journal-upload would return
something positive which would be interpreted as failure.
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Repetetive messages can be annoying when running with
SYSTEMD_LOG_LEVEL=debug, but they are sometimes very useful
when debugging problems. Add log_trace which is like log_debug
but becomes a noop unless LOG_TRACE is defined during compilation.
This makes it easy to enable very verbose logging for a subset
of programs when compiling from source.
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Precision of INT_MAX does not work as I expected it to.
https://bugzilla.redhat.com/show_bug.cgi?id=1154334
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Do our best verify that we can actually write the state file
before upload commences to avoid duplicate messages on the server.
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socknameinfo_pretty() would fail for addresses without reverse DNS,
but we do not want that to happen.
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Return a proper code instead of simply NULL for failure.
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This possibility was recently added, and it makes debugging much nicer.
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Systemd 209 started setting $WATCHDOG_PID, and sd-daemon watch was
modified to check for this variable. This means that
sd_watchdog_enabled() stopped working with previous versions of
systemd. But sd-event is a public library and API and we must keep it
working even when a program compiled with a newer version of the
libary is used on a system running an older version of the manager.
getenv() and unsetenv() are fairly expensive calls, so optimize
sd_watchdog_enabled() by not calling them when unnecessary.
man: centralize the description of $WATCHDOG_PID and $WATCHDOG_USEC in
the sd_watchdog_enabled manpage. It is better not to repeat the same
stuff in two places.
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systemd-journal-flush.service
This new command will ask the journal daemon to flush all log data
stored in /run to /var, and wait for it to complete. This is useful, so
that in case of Storage=persistent we can order systemd-tmpfiles-setup
afterwards, to ensure any possibly newly created directory in /var/log
gets proper access mode and owners.
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string_is_safe()
After all, we know have this as generic validator, so let's be correct
and use it wherver applicable.
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sd_bus_get_owner_creds() was only halfly ported over to
_cleanup_bus_creds_unref_.
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runtime journal is migrated to system journal when only
"/run/systemd/journal/flushed" exist. It's ok but according to this
the system journal directory size(max use) can be over the config. If
journal is not rotated during some time the journal directory can be
remained as over the config(or default) size. To avoid, do
server_vacuum just after the system journal migration from runtime.
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If it really is missing it should be safe to create it.
Also see:
http://lists.freedesktop.org/archives/systemd-devel/2014-August/022726.html
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names
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kdbus learned a new ioctl to tell userspace about a bus creator's
credentials, which is what we need to implement sd_bus_get_owner_creds() for
kdbus.
Move the function from sd-bus.c to bus-control.c to be able to reuse
the bus_populate_creds_from_items() helper.
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sd_bus_get_peer_creds()
Clean up the function namespace by renaming the following:
sd_bus_get_owner_uid() → sd_bus_get_name_creds_uid()
sd_bus_get_owner_machine_id() → sd_bus_get_name_machine_id()
sd_bus_get_peer_creds() → sd_bus_get_owner_creds()
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We will re-use the code to walk items in order to populate a creds object,
so let's factor it out first.
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kdbus learned a new command to query a bus creator's credentials. Sync
kdbus.h first, which also renames some struct to more generic terms.
That is, however, not an ABI break this time.
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We can simplify our code quite a bit if we explicitly check for the
ifindex being 1 on Linux as a loopback check. Apparently, this is
hardcoded on Linux on the kernel, and effectively exported to userspace
via rtnl and such, hence we should be able to rely on it.
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Don't handle clock_gettime() errors gracefully but use assert_se().
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The -l (lock) has been temporary disabled due to conflict with
udev (https://bugs.freedesktop.org/show_bug.cgi?id=79576)
The problem is fixed since util-linux v2.25 (Jul 2014).
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kdbus_msg.timeout_ns now takes an absolute value, based on CLOCK_MONOTONIC,
in order to eventually support automatically restarted syscalls.
Signed-off-by: Daniel Mack <daniel@zonque.org>
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In kdbus.h, the following details changed:
* All commands gained a 'kernel_flags' field to report the flags supported
by the driver. Before, this was done in the 'flags' field in a
bidirectional way, which turned out to be a problem for the code in
sd-bus, as many parts of it reuse the same ioctl struct more than once
and consider them to be owned by userspace.
* Name listings are now returned by a new struct instead of reusing struct
kdbus_cmd_name for that matter. This way, we don't add more unneeded
fields to it and make the API cleaner.
* 'conn_flags' was renamed to 'flags' in struct kdbus_cmd_hello to make
the API a bit more unified.
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This could overflow on 32bit, where size_t is the same as unsigned.
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