[01/10] pNFS/flexfiles: Don't attempt to send layoutstats if there are no entries
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Message ID 20161203205725.12961-2-trond.myklebust@primarydata.com
State New
Headers show

Commit Message

Trond Myklebust Dec. 3, 2016, 8:57 p.m. UTC
If the list of mirrors is empty, then don't send an RPC call.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
---
 fs/nfs/flexfilelayout/flexfilelayout.c | 5 +++++
 1 file changed, 5 insertions(+)

Patch
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diff --git a/fs/nfs/flexfilelayout/flexfilelayout.c b/fs/nfs/flexfilelayout/flexfilelayout.c
index 90462a2a9237..a6264d6836dc 100644
--- a/fs/nfs/flexfilelayout/flexfilelayout.c
+++ b/fs/nfs/flexfilelayout/flexfilelayout.c
@@ -2250,6 +2250,11 @@  ff_layout_prepare_layoutstats(struct nfs42_layoutstat_args *args)
 	args->num_dev = ff_layout_mirror_prepare_stats(args,
 			&ff_layout->generic_hdr, dev_count);
 	spin_unlock(&args->inode->i_lock);
+	if (!args->num_dev) {
+		kfree(args->devinfo);
+		args->devinfo = NULL;
+		return -ENOENT;
+	}
 
 	return 0;
 }