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svcrdma: Add a "deferred close" helper

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Refactor a bit of commonly used logic so that every site that wants
a close deferred to an nfsd thread does all the right things
(set_bit(XPT_CLOSE) then enqueue).

Also, once XPT_CLOSE is set on a transport, it is never cleared. If
XPT_CLOSE is already set, then the close is already being handled
and the enqueue can be skipped.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
This commit is contained in:
Chuck Lever
2021-02-20 18:53:40 -05:00
parent c558d47596
commit e844d307d4
7 changed files with 30 additions and 24 deletions
Download Patch File Download Diff File Expand all files Collapse all files

5
net/sunrpc/xprtrdma/svc_rdma_rw.c
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@@ -250,7 +250,7 @@ static void svc_rdma_write_done(struct ib_cq *cq, struct ib_wc *wc)
wake_up(&rdma->sc_send_wait);
if (unlikely(wc->status != IB_WC_SUCCESS))
set_bit(XPT_CLOSE, &rdma->sc_xprt.xpt_flags);
svc_xprt_deferred_close(&rdma->sc_xprt);
svc_rdma_write_info_free(info);
}
@@ -334,7 +334,6 @@ static void svc_rdma_wc_read_done(struct ib_cq *cq, struct ib_wc *wc)
static int svc_rdma_post_chunk_ctxt(struct svc_rdma_chunk_ctxt *cc)
{
struct svcxprt_rdma *rdma = cc->cc_rdma;
struct svc_xprt *xprt = &rdma->sc_xprt;
struct ib_send_wr *first_wr;
const struct ib_send_wr *bad_wr;
struct list_head *tmp;
@@ -373,7 +372,7 @@ static int svc_rdma_post_chunk_ctxt(struct svc_rdma_chunk_ctxt *cc)
} while (1);
trace_svcrdma_sq_post_err(rdma, ret);
set_bit(XPT_CLOSE, &xprt->xpt_flags);
svc_xprt_deferred_close(&rdma->sc_xprt);
/* If even one was posted, there will be a completion. */
if (bad_wr != first_wr)