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cifs: smbd: Retry on memory registration failure

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Memory registration failure doesn't mean this I/O has failed, it means the
transport is hitting I/O error or needs reconnect. This error is not from
the server.

Indicate this error to upper layer, and let upper layer decide how to
reconnect and proceed with this I/O.

Signed-off-by: Long Li <longli@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
This commit is contained in:
Long Li 2019-04-05 21:36:34 +00:00 committed by Steve French
parent 62fdf6707e
commit b797209219
1 changed files with 2 additions and 2 deletions
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4
fs/cifs/smb2pdu.c
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@ -3223,7 +3223,7 @@ smb2_new_read_req(void **buf, unsigned int *total_len,
rdata->nr_pages, rdata->page_offset, rdata->nr_pages, rdata->page_offset,
rdata->tailsz, true, need_invalidate); rdata->tailsz, true, need_invalidate);
if (!rdata->mr) if (!rdata->mr)
return -ENOBUFS; return -EAGAIN;
req->Channel = SMB2_CHANNEL_RDMA_V1_INVALIDATE; req->Channel = SMB2_CHANNEL_RDMA_V1_INVALIDATE;
if (need_invalidate) if (need_invalidate)
@ -3628,7 +3628,7 @@ smb2_async_writev(struct cifs_writedata *wdata,
wdata->nr_pages, wdata->page_offset, wdata->nr_pages, wdata->page_offset,
wdata->tailsz, false, need_invalidate); wdata->tailsz, false, need_invalidate);
if (!wdata->mr) { if (!wdata->mr) {
rc = -ENOBUFS; rc = -EAGAIN;
goto async_writev_out; goto async_writev_out;
} }
req->Length = 0; req->Length = 0;