| Commit message (Collapse) | Author | Age | Files | Lines |
|---|
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| |
Buildroot's libdm is not built with --enable-udev_sync, so device-mapper
actions are not able to sync or wait for udev events.
(see 185676316, "discover/devmapper: Disable libdm udev sync support")
This can cause an issue when tearing down a snapshot in
devmapper_destroy_snapshot() which performs a DM_DEVICE_REMOVE task
against the snapshot, origin, and base devices one after the other. In
some cases if the interval between these actions is too short the action
can fail as the preceding device hasn't disappeared yet and the device
being removed is still busy.
Since we don't yet have a way to tell exactly when the device is ready,
pause for a short time and retry the action, letting
devmapper_destroy_snapshot() continue and, for example, letting
mount_device() fall back to the physical device.
Signed-off-by: Samuel Mendoza-Jonas <sam@mendozajonas.com>
|
| |
|
|
|
|
|
|
| |
The only functional change should be an additional '/n' to
a few log messagees that seemed to be missing it.
Signed-off-by: Geoff Levand <geoff@infradead.org>
Signed-off-by: Samuel Mendoza-Jonas <sam@mendozajonas.com>
|
| |
|
|
|
|
|
|
|
| |
Fixes build warnings like these when building 32 bit programs:
warning: format ‘%lu’ expects argument of type ‘long unsigned int’, but argument has type ‘uint64_t’
Signed-off-by: Geoff Levand <geoff@infradead.org>
Signed-off-by: Samuel Mendoza-Jonas <sam@mendozajonas.com>
|
| |
|
|
|
|
|
|
|
| |
Add a 'pb-' prefix to all device mapper devices created by Petitboot.
Beyond helping to identify Petitboot-related devices, this avoids naming
collisions if we create snapshots of LVM logical volumes which also
exist in /dev/mapper.
Signed-off-by: Samuel Mendoza-Jonas <sam@mendozajonas.com>
|
| |
|
|
|
|
|
|
|
|
|
|
|
| |
If udev doesn't export the ID_PART_ENTRY_SIZE variable for a device we
skip creating a snapshot for it. However in most cases the sysfs
attribute which udev reads to find ID_PART_ENTRY_SIZE is still
available. Therefore if we don't have access to ID_PART_ENTRY_SIZE try
to find the size in sysfs directly.
This allows us to create snapshots for devices which often don't have
this udev variable set, such as software raid (md) devices and NVMe
devices.
Signed-off-by: Samuel Mendoza-Jonas <sam@mendozajonas.com>
|
| |
|
|
|
|
|
|
|
| |
We currently have a bug where the return value from get_block_sectors
may overflow an unsigned int, so we create a snapshot that is too small.
This change uses uint64_t types for the sector counts.
Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
|
| |
|
|
|
|
|
| |
Add a debug-style nvram parameter to disallow the use of device-mapper
snapshots.
Signed-off-by: Samuel Mendoza-Jonas <sam.mj@au1.ibm.com>
|
| |
|
|
|
|
|
|
|
|
|
| |
Certain userspace environments that Petitboot is packaged with include
a libdm built with udev sync support which hung with the previous approach.
Relying on udev to properly process dm device creation makes some
assumptions about the flavour of udev available - until that is certain
disable udev sync support and have device-mapper control device creation
itself.
Signed-off-by: Samuel Mendoza-Jonas <sam.mj@au1.ibm.com>
|
|
|
Add discover/dm-snapshot that allows the creation of device-mapper
snapshots that support merging changes back to disk.
Device-mapper snapshots are a CoW device backed by a ramdisk, mirroring
the contents of a source device. No changes are made to the original
disk unless an explicit merge action is performed. This guarantees
read-only mounting of host disks even when writes could implicitly
occur, eg. when performing recovering a journaled filesystem.
In the event that writing back to the disk is desired, such as when
updating grubenv, the changes made to the snapshot can be merged back to
the source disk.
This patch adds support but does not change functionality.
Signed-off-by: Samuel Mendoza-Jonas <sam.mj@au1.ibm.com>
|
