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Add internal error warning when string value is used
as sort value for numerical field.
Using log_warn since the function itself does not return error,
so we do not confuse log_error() checker.
Send error message on stdout, since after _display_info_long()
command return errors.
Patch makes consistent behavior for command:
dmsetup info -c non-existing-dev
&
dmsetup info non-existing-dev
Now both commands report error on stderr when they return error status
for non-existing device.
On modern systems udev manages nodes in /dev/mapper directory.
It creates, deletes and renames the nodes according to the
state of the kernel driver.
When the dmsetup is compiled without udev support (--enable-udev_sync)
and runs on the system with running udevd it tries to manage nodes in
/dev/mapper too, so it can race with udev.
dmsetup checks if the node was created/deleted/renamed with the stat
syscall, and skips the operation if it was. However, if udev
creates/deletes/renames the node after the stat syscall and before the
mknod/unlink/rename syscall, dmsetup reports an error.
Since in the system everything happened as expected, skip reporting
error for such case.
These races can be easily provoked by inserting sleep at appropriate
places.
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
This file may be included by other programs, so it should be compliant
with the C standard.
* use __linux__ instead of linux - __linux__ is always defined, linux is
not defined when gcc runs in standard-compliant mode (with -std=c89 or
-std=c99) because the C standard doesn't allow polluting namespace
with arbitrary defines.
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Just like we have symbolic names assigned to general DM udev flags
(DM_UDEV_* flags), we have the same for any subsystem flags now
(DM_SUBSYSTEM_UDEV_FLAG*), making it easier to use.
Each subsystem rule that needs to import any of DM_SUBSYSTEM_UDEV_FLAG*
flags is responsible for doing so. This simply moves control of these
flags from general 10-dm.rules to any subsystem rule using these flags
as each subsystem knows better how to handle these flags on its own.
Do not allow passing '' names to kernel.
This test was missing also in kernel, so it has allowed
to create device with '' name. This then confused dmsetup tool,
since such name is unexpected and unsupported. To remove
such name from table, user has to use -j -m to specify which device
should be removed.
This patch fixes the posibility to run this operation:
dmsetup rename existingdev ''
after this operation commands like 'dmsetup table' are failing.
This patch prohibits to use such name.
Recent kernels allow messages to respond with a string.
Add dm_task_get_message_response() to libdevmapper to perform some
basic sanity checks and return this.
Have 'dmsetup message' display any response.
DM statistics will make extensive use of this.
(From Mikulas.)
84 files changed, 1540 insertions(+), 442 deletions(-)
Mostly bug fixes this time.
Also note:
md raid replaces dm mirroring as the default implementation.
Can call out to thin_repair to fix thin metadata.
Improved clvmd error detection/debugging information.
Support tests with abort when libdm encounters internal
error - i.e. for dmsetup tool.
Code execution will be aborted when
env var DM_ABORT_ON_INTERNAL_ERRORS is set to 1
363 files changed, 19863 insertions(+), 9055 deletions(-)
This is a very large release - so expect bugs!
Please treat this release like a release candidate.
Changes to the external interfaces since 2.02.98 are not yet frozen.
Updated releases will follow quickly (days not weeks) as any problems
are handled.
Clear send_messages flag when they have been delivered successfully.
There is no need to validate it for all other activations of the same
node in the dm_tree.
Also add extra debug message which shows the reason for skipping
sending of messages because the transaction_id has already the matching
value.
Instead of calling syslog() from signal event handler,
run all logging code in the main loop.
Also it needs to take the lock and check for list
only when really needed.
Switch to use libdm dm_get_status_snapshot() function for
reading status info.
This fixes bug, where the code was using 32bit integers,
while the snapshot target is able to return 64bit sizes.
However this also means, someone is using >1TB snapshot
cow devices, which is actually very bad idea anyway, since the
perfomance and memory usage in this case is very bad.
To detect mounted device, use also /proc/self/mountinfo
as so far the check was only able to detect ext4 mounted filesystem.
TODO:
Once proper testing for this feature is added, it may appear,
mountinfo check is enough and covers all cases and sysfs check
could be removed.
Sharing char* with field has a problem in error path,
when we allocate event, but fail to allocate timeout string.
Instead of creating complicated error paths to resolve
it individually stop using unions, and let the resource
to be released in a simple _free_message().
