From 119e9db233ad0f4cbd4cfb9f9385a7bca378b37d Mon Sep 17 00:00:00 2001 From: Zeng Chi Date: Mon, 21 Sep 2026 18:24:42 +0800 Subject: KVM: Don't pre-reserve xarray entries when storing empty/NULL attributes Skip the xarray reservation loop when clearing all memory attributes, as storing NULL only erases the entry and never needs to allocate, so no reservation (and no cleanup of a failed one) is required in that case. Suggested-by: Sean Christopherson Cc: David Ballesteros Signed-off-by: Zeng Chi Link: https://patch.msgid.link/20260921102442.1232375-1-zeng_chi911@163.com [sean: split to separate patch] Signed-off-by: Sean Christopherson --- drivers/md/md-cluster.h | 44 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 44 insertions(+) create mode 100644 drivers/md/md-cluster.h (limited to 'drivers/md/md-cluster.h') diff --git a/drivers/md/md-cluster.h b/drivers/md/md-cluster.h new file mode 100644 index 000000000..8fb06d853 --- /dev/null +++ b/drivers/md/md-cluster.h @@ -0,0 +1,44 @@ +/* SPDX-License-Identifier: GPL-2.0 */ + + +#ifndef _MD_CLUSTER_H +#define _MD_CLUSTER_H + +#include "md.h" + +struct mddev; +struct md_rdev; + +struct md_cluster_operations { + struct md_submodule_head head; + + int (*join)(struct mddev *mddev, int nodes); + int (*leave)(struct mddev *mddev); + int (*slot_number)(struct mddev *mddev); + int (*resync_info_update)(struct mddev *mddev, sector_t lo, sector_t hi); + int (*resync_start_notify)(struct mddev *mddev); + int (*resync_status_get)(struct mddev *mddev); + void (*resync_info_get)(struct mddev *mddev, sector_t *lo, sector_t *hi); + int (*metadata_update_start)(struct mddev *mddev); + int (*metadata_update_finish)(struct mddev *mddev); + void (*metadata_update_cancel)(struct mddev *mddev); + int (*resync_start)(struct mddev *mddev); + int (*resync_finish)(struct mddev *mddev); + int (*area_resyncing)(struct mddev *mddev, int direction, sector_t lo, sector_t hi); + int (*add_new_disk)(struct mddev *mddev, struct md_rdev *rdev); + void (*add_new_disk_cancel)(struct mddev *mddev); + int (*new_disk_ack)(struct mddev *mddev, bool ack); + int (*remove_disk)(struct mddev *mddev, struct md_rdev *rdev); + void (*load_bitmaps)(struct mddev *mddev, int total_slots); + int (*gather_bitmaps)(struct md_rdev *rdev); + int (*resize_bitmaps)(struct mddev *mddev, sector_t newsize, sector_t oldsize); + int (*lock_all_bitmaps)(struct mddev *mddev); + void (*unlock_all_bitmaps)(struct mddev *mddev); + void (*update_size)(struct mddev *mddev, sector_t old_dev_sectors); +}; + +extern int md_setup_cluster(struct mddev *mddev, int nodes); +extern void md_cluster_stop(struct mddev *mddev); +extern void md_reload_sb(struct mddev *mddev, int raid_disk); + +#endif /* _MD_CLUSTER_H */ -- cgit v1.3.1