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Commit 2f8220c1 authored by Trond Myklebust's avatar Trond Myklebust
Browse files

NFS: Fix up read of mirror stats 



Need to lock while reading in order to ensure 64-bit reads are correct.

Signed-off-by: default avatarTrond Myklebust <trond.myklebust@primarydata.com>
parent 08e2e5bc

fs/nfs/flexfilelayout/flexfilelayout.c

+2 −0
Original line number Diff line number Diff line
@@ -2250,10 +2250,12 @@ ff_layout_mirror_prepare_stats(struct pnfs_layout_hdr *lo, 
		memcpy(&devinfo->dev_id, &dev->deviceid, NFS4_DEVICEID4_SIZE);

		devinfo->offset = 0;

		devinfo->length = NFS4_MAX_UINT64;

		spin_lock(&mirror->lock);

		devinfo->read_count = mirror->read_stat.io_stat.ops_completed;

		devinfo->read_bytes = mirror->read_stat.io_stat.bytes_completed;

		devinfo->write_count = mirror->write_stat.io_stat.ops_completed;

		devinfo->write_bytes = mirror->write_stat.io_stat.bytes_completed;

		spin_unlock(&mirror->lock);

		devinfo->layout_type = LAYOUT_FLEX_FILES;

		devinfo->layoutstats_encode = ff_layout_encode_layoutstats;

		devinfo->layout_private = mirror;