f2fs: refresh pinned allocation boundary after resize

Online shrink updates MAIN_SECS() but leaves resizable_tail_secno and
pinned_area_max_secno unchanged. The pinned allocation limit can exceed
the new main area when shrinking beyond the reserved tail.

Consume the reserved tail by the number of removed sections, clamping
it to zero, before refreshing the shared pinned allocation boundary.
This preserves the boundary while shrinking within the reservation and
limits it to the new main area otherwise, retaining the zoned limit.

Save the old tail count and restore it before rolling back the geometry
if the final checkpoint fails.

Also bound pinned section allocation by the current MAIN_SECS(). Range
evacuation temporarily reduces it before moving cursegs, while the
cached pinned boundary still describes the old geometry. Otherwise, a
pinned curseg can be reallocated into the range being removed.

Fixes: c966d29e01bb ("f2fs: support resizable tail section and unify pinned allocation")
Suggested-by: Daeho Jeong <daehojeong@google.com>
Signed-off-by: Wenjie Qi <qiwenjie@xiaomi.com>
Reviewed-by: Daeho Jeong <daehojeong@google.com>
Reviewed-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

0 files changed, 0 insertions, 0 deletions