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During a node failure, We need to suspend read balancing so that the reads are directed to the first device and stale data is not read. Suspending writes is not required because these would be recorded and synced eventually. A new flag MD_CLUSTER_SUSPEND_READ_BALANCING is set in recover_prep(). area_resyncing() will respond true for the entire devices if this flag is set and the request type is READ. The flag is cleared in recover_done(). Signed-off-by: Goldwyn Rodrigues <rgoldwyn@suse.com> Reported-By: David Teigland <teigland@redhat.com> Signed-off-by: NeilBrown <neilb@suse.com>
29 lines
999 B
C
29 lines
999 B
C
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#ifndef _MD_CLUSTER_H
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#define _MD_CLUSTER_H
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#include "md.h"
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struct mddev;
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struct md_rdev;
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struct md_cluster_operations {
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int (*join)(struct mddev *mddev, int nodes);
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int (*leave)(struct mddev *mddev);
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int (*slot_number)(struct mddev *mddev);
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void (*resync_info_update)(struct mddev *mddev, sector_t lo, sector_t hi);
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int (*resync_start)(struct mddev *mddev, sector_t lo, sector_t hi);
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void (*resync_finish)(struct mddev *mddev);
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int (*metadata_update_start)(struct mddev *mddev);
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int (*metadata_update_finish)(struct mddev *mddev);
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int (*metadata_update_cancel)(struct mddev *mddev);
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int (*area_resyncing)(struct mddev *mddev, int direction, sector_t lo, sector_t hi);
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int (*add_new_disk_start)(struct mddev *mddev, struct md_rdev *rdev);
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int (*add_new_disk_finish)(struct mddev *mddev);
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int (*new_disk_ack)(struct mddev *mddev, bool ack);
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int (*remove_disk)(struct mddev *mddev, struct md_rdev *rdev);
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int (*gather_bitmaps)(struct md_rdev *rdev);
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};
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#endif /* _MD_CLUSTER_H */
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