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xattrs on cgroup fs were added back in v3.6-rc3-3-g03b1cde. But we
support kernels >= 2.6.39, and we should also support kernels compiled
w/o xattr support, even if systemd is compiled with xattr support.
Fall back to mounting without xattr support.
Tested-by: Colin Walters <walters@verbum.org>
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of their conditions fails
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Instead of having explicit type-specific callbacks that inform the
triggering unit when a triggered unit changes state, make this generic
so that state changes are forwarded betwee any triggered and triggering
unit.
Also, get rid of UnitRef references from automount, timer, path units,
to the units they trigger and rely exclsuively on UNIT_TRIGGER type
dendencies.
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Session objects will now get the .session suffix, user objects the .user
suffix, nspawn containers the .nspawn suffix.
This also changes the user cgroups to be named after the numeric UID
rather than the username, since this allows us the parse these paths
standalone without requiring access to the cgroup file system.
This also changes the mapping of instanced units to cgroups. Instead of
mapping foo@bar.service to the cgroup path /user/foo@.service/bar we
will now map it to /user/foo@.service/foo@bar.service, in order to
ensure that all our objects are properly suffixed in the tree.
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As discussed with Dan Berrange it's a good idea to suffix all objects in
the cgroup tree with ".something", so that when the system is
partitioned using a resource management tool we can drop objects of
different types into the same partition directory without generate
namespace conflicts.
We'l add this to the Pax Control Group document as soon as write access
to the fdo wiki is restored.
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This is really just a special case of systemd-tmpfiles-setup, moreover it could easily create more than static nodes.
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All attributes are stored as text, since root_directory is already
text, and it seems easier to have all of them in text format.
Attributes are written in the trusted. namespace, because the kernel
currently does not allow user. attributes on cgroups. This is a PITA,
and CAP_SYS_ADMIN is required to *read* the attributes. Alas.
A second pipe is opened for the child to signal the parent that the
cgroup hierarchy has been set up.
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Underlinking can cause subtle bugs like the recent issue with
libnss_myhostname (which was fixed in commit 1e335af7).
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This reverts commit 4826f0b7b5c0aefa08b8cc7ef64d69027f84da2c.
Because statfs.t_type can be int on some architecures, we have to cast
the const magic to the type, otherwise the compiler warns about
signed/unsigned comparison, because the magic can be 32 bit unsigned.
statfs(2) man page is also wrong on some systems, because
f_type is not __SWORD_TYPE on some architecures.
The following program:
int main(int argc, char**argv)
{
struct statfs s;
statfs(argv[1], &s);
printf("sizeof(f_type) = %d\n", sizeof(s.f_type));
printf("sizeof(__SWORD_TYPE) = %d\n", sizeof(__SWORD_TYPE));
printf("sizeof(long) = %d\n", sizeof(long));
printf("sizeof(int) = %d\n", sizeof(int));
if (sizeof(s.f_type) == sizeof(int)) {
printf("f_type = 0x%x\n", s.f_type);
} else {
printf("f_type = 0x%lx\n", s.f_type);
}
return 0;
}
executed on s390x gives for a btrfs:
sizeof(f_type) = 4
sizeof(__SWORD_TYPE) = 8
sizeof(long) = 8
sizeof(int) = 4
f_type = 0x9123683e
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nspawn will overmount resolv.conf if it exists. Since e.g.
default install with yum doesn't create /etc/resolv.conf,
a container created with yum will not have network. This
seems undesirable, and since we overmount the file anyway,
let's create it too.
Also, mounting a read-write /etc/resolv.conf in the container
is treated as a failure, since it makes it possible to
modify hosts /etc/resolv.conf from inside the container.
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direction.
https://bugs.freedesktop.org/show_bug.cgi?id=63672
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If the key file cannot be accessed, we can at least ask for the
password.
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libsystemd-audit needs functions from libsystemd-shared, so
libsystemd-audit needs to appear first. Otherwise:
CCLD systemd-logind
./.libs/libsystemd-audit.a(audit.o): In function `audit_session_from_pid':
/home/josh/src/systemd/src/shared/audit.c:50: undefined reference to `detect_container'
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This patch adds --disable-tests to configure. It is based on a patch
posted by Thierry Reding in 2010. The motivation for adding it is that
some tests fail link-time when cross-compiling.
The patch adds a new Makefile variable -- manual_tests -- and uses
that instead of noinst_PROGRAMS. However, if ENABLE_TESTS is true,
the former is added to the latter. It also renames noinst_tests to
simply tests.
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This reverts commit a858b64dddf79177e12ed30f5e8c47a1471c8bfe.
This reverts commit aea275c43194b6ac519ef907b62c5c995050fde0.
This reverts commit fc6e6d245ee3989c222a2a8cc82a33475f9922f3.
This reverts commit c4073a27c555aeceac87a3b02a83141cde641a1e.
This reverts commit cddf148028f525be8176e7f1cbbf4f862bd287f6.
This reverts commit 8c68a70170b31f93c287f29fd06c6c17edaf19ad.
The constants are now casted to __SWORD_TYPE, which should resolve the
compiler warnings about signed vs unsigned.
After talking to Kay, we concluded:
This should be fixed in the kernel, not worked around in userspace tools.
Architectures cannot use int and expect magic constants lager than INT_MAX
to work correctly. The kernel header needs to be fixed.
Even coreutils cannot handle it:
#define RAMFS_MAGIC 0x858458f6
# stat -f -c%t /
ffffffff858458f6
#define BTRFS_SUPER_MAGIC 0x9123683E
# stat -f -c%t /mnt
ffffffff9123683e
Although I found the perfect working macro to fix the thing :)
__extension__ ({ \
bool _ret = false; \
switch(f) { case c: _ret=true; }; \
( _ret ); \
})
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const
If the magic parameter is not a const, then the macro does not work, so
better fail to compile, than be surprised afterwards.
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systemd does not want to understand comments after the first
non-whitespace char occured.
key=foo #comment will result into key == "foo #comment"
key="foo" #comment will result into key == "foo#comment"
"key= #comment" will result into key == "#comment"
"key #comment" is an invalid line
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p pointer is not _cleanup_free_
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http://lists.freedesktop.org/archives/systemd-devel/2013-April/010510.html
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On some architectures (like s390x) the kernel has the type int for
f_type, but long in userspace.
Assigning the 32 bit magic constants from linux/magic.h to the 31 bit
signed f_type in the kernel, causes f_type to be negative for some
constants.
glibc extends the int to long for those architecures in 64 bit mode, so
the negative int becomes a negative long, which cannot be simply
compared to the original magic constant, because the compiler would
automatically cast the constant to long.
To workaround this issue, we also compare to the (int)MAGIC value in a
macro. Of course, we could do #ifdef with the architecure, but it has to
be maintained, and the magic constants are 32 bit anyway.
Someday, when the int is unsigned or long for all architectures, we can
remove this macro again. Until then, keep it as simple as it can be.
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