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pNFS: Prevent unnecessary layoutreturns after delegreturn 

If we cannot grab the inode or superblock, then we cannot pin the
layout header, and so we cannot send a layoutreturn as part of an
async delegreturn call. In this case, we currently end up sending
an extra layoutreturn after the delegreturn. Since the layout was
implicitly returned by the delegreturn, that just gets a BAD_STATEID.

The fix is to simply complete the return-on-close immediately.

Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
This commit is contained in:
Trond Myklebust 2016-11-19 08:48:47 -05:00
parent 1c5bd76d17
commit 53e6fc86ab
1 changed files with 4 additions and 2 deletions
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6
fs/nfs/nfs4proc.c
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@ -5744,14 +5744,16 @@ static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, co
nfs_fattr_init(data->res.fattr);
data->timestamp = jiffies;
data->rpc_status = 0;
data->lr.roc = pnfs_roc(inode, &data->lr.arg, &data->lr.res, cred);
data->inode = nfs_igrab_and_active(inode);
if (data->inode) {
data->lr.roc = pnfs_roc(inode, &data->lr.arg, &data->lr.res,
cred);
if (data->lr.roc) {
data->args.lr_args = &data->lr.arg;
data->res.lr_res = &data->lr.res;
}
} else if (data->lr.roc) {
pnfs_roc_release(&data->lr.arg, &data->lr.res, 0);
data->lr.roc = false;
}
task_setup_data.callback_data = data;