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http://lists.freedesktop.org/archives/systemd-devel/2015-May/031658.html
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Previously all bind mount mounts were applied in the order specified,
followed by all tmpfs mounts in the order specified. This is
problematic, if bind mounts shall be placed within tmpfs mounts.
This patch hence reworks the custom mount point logic, and alwas applies
them in strict prefix-first order. This means the order of mounts
specified on the command line becomes irrelevant, the right operation
will always be executed.
While we are at it this commit also adds native support for overlayfs
mounts, as supported by recent kernels.
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=================================================================
==64281==ERROR: LeakSanitizer: detected memory leaks
Direct leak of 32 byte(s) in 1 object(s) allocated from:
#0 0x7f623c961c4a in malloc (/usr/lib64/libasan.so.2+0x96c4a)
#1 0x5651f79ad34e in malloc_multiply (/home/crrodriguez/scm/systemd/systemd-modules-load+0x2134e)
#2 0x5651f79b02d6 in strjoin (/home/crrodriguez/scm/systemd/systemd-modules-load+0x242d6)
#3 0x5651f79be1f5 in files_add (/home/crrodriguez/scm/systemd/systemd-modules-load+0x321f5)
#4 0x5651f79be6a3 in conf_files_list_strv_internal (/home/crrodriguez/scm/systemd/systemd-modules-load+0x326a3)
#5 0x5651f79bea24 in conf_files_list_nulstr (/home/crrodriguez/scm/systemd/systemd-modules-load+0x32a24)
#6 0x5651f79ad01a in main (/home/crrodriguez/scm/systemd/systemd-modules-load+0x2101a)
#7 0x7f623c11586f in __libc_start_main (/lib64/libc.so.6+0x2086f)
SUMMARY: AddressSanitizer: 32 byte(s) leaked in 1 allocation(s).
This happens due to the wrong cleanup attribute is used (free vs strv_free)
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In this usecase, the file will never be materialized
with linkat().
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Stop relying on global variables in event handlers, and move them
all to a Manager object instead.
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Before:
May 12 17:11:22 tomegun-x2402 systemd[1]: systemd-udevd.service: Got notification message for unit.
May 12 17:11:22 tomegun-x2402 systemd[1]: systemd-udevd.service: Got notification message from PID 195 (READY=1)
May 12 17:11:22 tomegun-x2402 systemd[1]: systemd-udevd.service: Ggot READY=1
After:
May 12 17:11:22 tomegun-x2402 systemd[1]: systemd-udevd.service: Got notification message from PID 195 (READY=1)
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This avoids updating the flag files twice for every loop, and also removes another dependency
in the main-loop, so we are freer to reshufle it as we want.
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Rather than skippling ctrl handling whenever we have handlede inotify events
(and hence may have synthesized a 'change' event), just call the uevent
handling explicitly from on_inotify() so that the event queue is up-to-date.
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In containers we never have udev devices, so drop the assert.
This fixes an assertion introduced in af3aa302741b6edb0729925febb5f8bc26721fe3.
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This allows us to simplify the ctrl_msg handler. Eventually all this global state should move to
a Manager object or so.
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A typo from 7410616c. We want to ignore EINVAL but only catch errors.
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All other types exported from install.h should be namespaces like this,
hence namespace InstallInfo the same way.
Also, remove external forward definition of UnitFileScope type.
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It's primarily just a property of the Manager object after all, and we
try to refer to PID 1 as "manager" instead of "systemd", hence let's to
stick to this here too.
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The call is only used by the mount and automount unit types, but that's
already enough to consider it generic unit functionality, hence move it
out of mount.c and into unit.c.
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This changes log_unit_info() (and friends) to take a real Unit* object
insted of just a unit name as parameter. The call will now prefix all
logged messages with the unit name, thus allowing the unit name to be
dropped from the various passed romat strings, simplifying invocations
drastically, and unifying log output across messages. Also, UNIT= vs.
USER_UNIT= is now derived from the Manager object attached to the Unit
object, instead of getpid(). This has the benefit of correcting the
field for --test runs.
Also contains a couple of other logging improvements:
- Drops a couple of strerror() invocations in favour of using %m.
- Not only .mount units now warn if a symlinks exist for the mount
point already, .automount units do that too, now.
- A few invocations of log_struct() that didn't actually pass any
additional structured data have been replaced by simpler invocations
of log_unit_info() and friends.
- For structured data a new LOG_UNIT_MESSAGE() macro has been added,
that works like LOG_MESSAGE() but prefixes the message with the unit
name. Similar, there's now LOG_LINK_MESSAGE() and
LOG_NETDEV_MESSAGE().
- For structured data new LOG_UNIT_ID(), LOG_LINK_INTERFACE(),
LOG_NETDEV_INTERFACE() macros have been added that generate the
necessary per object fields. The old log_unit_struct() call has been
removed in favour of these new macros used in raw log_struct()
invocations. In addition to removing one more function call this
allows generated structured log messages that contain two object
fields, as necessary for example for network interfaces that are
joined into another network interface, and whose messages shall be
indexed by both.
- The LOG_ERRNO() macro has been removed, in favour of
log_struct_errno(). The latter has the benefit of ensuring that %m in
format strings is properly resolved to the specified error number.
- A number of logging messages have been converted to use
log_unit_info() instead of log_info()
- The client code in sysv-generator no longer #includes core code from
src/core/.
- log_unit_full_errno() has been removed, log_unit_full() instead takes
an errno now, too.
- log_unit_info(), log_link_info(), log_netdev_info() and friends, now
avoid double evaluation of their parameters
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Otherwise it might be passed in as 0, which is a valid fd, but usually
does not refer to a real endpoint.
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This way we know that any bridges and other user-created network devices
are in place, and can be properly added to the container.
In the long run this should be dropped, and replaced by direct calls
inside nspawn that cause the devices to be created when necessary.
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Under the assumption that strcmp() is cheaper than memory allocation,
let's avoid the allocation, if the new value is identical to the old.
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Let's just pass on what the user set for us.
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CID# 1297428
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CID#1297436
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In the initrafms, generate a systemd-fsck-root.service to replace
systemd-fsck@<sysroot-device>.service. This way, after we transition
to the real root, systemd-fsck-root.service is marked as already done.
This introduces an unnecessary synchronization point, because
systemd-fsck@* is ordered after systemd-fsck-root also in the
initramfs. In practice this shouldn't be a problem.
https://bugzilla.redhat.com/show_bug.cgi?id=1201979
C.f. 956eaf2b8d6c9999024705ddadc7393bc707de02.
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https://bugzilla.redhat.com/show_bug.cgi?id=1147651
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Simply query the size of the hashmap keeping all the worker contexts instead.
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This makes the code somewhat more readable.
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Make the worker context have the same life-span as the worker process. It is created on fork()
and free'd on SIGCHLD.
The change means that we can get worker_returned() for a worker context that is no longer around,
this is not a problem and we can just drop the message. The only use for worker_returned() is to
know to reschedule events to workers that are still around, so if the worker has already exited
it is not important to keep track of. We still print a debug statement in this case to be on the
safe side.
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Eeeew!
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CID#1296244
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Follow the coding style and avoid the exit handlers.
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We never return magic exit codes, but just EXIT_FAILUER or EXIT_SUCCESS.
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Take and drop explicit references where it makes sense.
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This is not used in the worker, so avoid having to free it there.
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We used to use this to track failed events so they could be retriggered,
but that is no longer done, so the code can be dropped.
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