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net: nfs: don't fail when nfs_read_reply returns -NFS_RPC_DROP

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That can happen if duplicate UDP packet arrived, and that's not uncommon.
Anyway, we ignore packets with rpc_id lower than last we sent for other
requests, so it makes sense to do that for read request as well.

Signed-off-by: Vasily Khoruzhick <anarsoul@gmail.com>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>
This commit is contained in:
Vasily Khoruzhick
2018-05-14 08:34:36 -07:00
committed by Joe Hershberger
parent 286bea2e85
commit d48d40a091
1 changed files with 2 additions and 0 deletions
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net/nfs.c
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@@ -822,6 +822,8 @@ static void nfs_handler(uchar *pkt, unsigned dest, struct in_addr sip,
case STATE_READ_REQ: case STATE_READ_REQ:
rlen = nfs_read_reply(pkt, len); rlen = nfs_read_reply(pkt, len);
if (rlen == -NFS_RPC_DROP)
break;
net_set_timeout_handler(nfs_timeout, nfs_timeout_handler); net_set_timeout_handler(nfs_timeout, nfs_timeout_handler);
if (rlen > 0) { if (rlen > 0) {
nfs_offset += rlen; nfs_offset += rlen;