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pNFS/flexfiles: Don't attempt to send layoutstats if there are no entries 

If the list of mirrors is empty, then don't send an RPC call.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
This commit is contained in:
Trond Myklebust 2016-11-25 13:24:09 -05:00
parent 1bcf4c5c59
commit 46c98c6d1b
1 changed files with 5 additions and 0 deletions
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5
fs/nfs/flexfilelayout/flexfilelayout.c
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@ -2250,6 +2250,11 @@ ff_layout_prepare_layoutstats(struct nfs42_layoutstat_args *args)
args->num_dev = ff_layout_mirror_prepare_stats(args, args->num_dev = ff_layout_mirror_prepare_stats(args,
&ff_layout->generic_hdr, dev_count); &ff_layout->generic_hdr, dev_count);
spin_unlock(&args->inode->i_lock); spin_unlock(&args->inode->i_lock);
if (!args->num_dev) {
kfree(args->devinfo);
args->devinfo = NULL;
return -ENOENT;
}
return 0; return 0;
} }