This patch series (14) implements manual reshape restart/continuation
in the following scenario:
1. Condition:
During system boot mdadm finds array under reshape that should be
assembled. This happens while initramfs is mounted
(before file system pivot)
2. Scenario:
a) Assembly procedure assembles array and runs reshape continuation
procedure (as usual). Reshape procedure continues reshape and during
file system pivot lost file system context and cannot control process
using check-pointing
To avoid this now reshape procedure detects that initramfs is mounted
(before pivot) and reshape critical section is restored and array
is prepared for reshape only. At this point mdadm finishes his work
for this array and array is fully functional/accessible now.
0001-Stop-array-reshape-when-mounted-initramfs-is-detecte.patch
0002-Stop-container-reshape-while-using-initramfs.patch
0003-FIX-Do-not-unblock-array-accidentally.patch
0007-FIX-Memory-leak-during-Assembly.patch
b) Afters system boot user manually can invoke reshape continuation.
New mdadm option '--continue' for grow command was added.
This allows for reshape continuation. mdadm for reshape continuation
uses parameters read from metadata. Command line can looks as follows:
mdadm -G --continue device_name [--backup-file=file_name]
where:
device_name : device that reshape should be continued on
e.g. /dev/md/container_name or /dev/md/raid_name
backup-file : optional parameter required when backup-file
was use previously for reshape execution
For external metadata mdadm takes carry for metadata compatibility
e.g. container operation can be continued on array device /and oposit/.
0004-Add-continue-option-to-grow-command.patch
0005-Add-Grow_continue_command.patch
0006-Check-and-run-mdmon.patch
0007-FIX-Memory-leak-during-Assembly.patch
0008-Check-if-reshape-can-be-restarted.patch
0009-Move-restore-backup-code-to-function.patch
0010-Perform-restore-backup-for-reshape-continuation.patch
0011-Add-possibility-to-restart-reshape-for-native-metada.patch
0012-Early-reshape-backup-verification.patch
0013-Check-if-md-allows-to-control-reshape.patch
3. man update:
The last patch provides madam's man update for '--continue' grow option
0014-Manual-update-for-continue-option.patch
BR
Adam
---
Adam Kwolek (14):
Manual update for --continue option
Check if md allows to control reshape
Early reshape backup verification
Add possibility to restart reshape for native metadata
Perform restore backup for reshape continuation
Move restore backup code to function
Check if reshape can be restarted
FIX: Memory leak during Assembly
Check and run mdmon
Add Grow_continue_command
Add continue option to grow command
FIX: Do not unblock array accidentally
Stop container reshape while using initramfs
Stop array reshape when mounted initramfs is detected
Assemble.c | 39 +-------
Grow.c | 290 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++-
ReadMe.c | 1
mdadm.8.in | 24 +++++
mdadm.c | 24 +++++
mdadm.h | 14 +++
sysfs.c | 10 ++
util.c | 59 ++++++++++++
8 files changed, 419 insertions(+), 42 deletions(-)
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