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From ce2c9ea016ffa20bf291264a012cc14102040900 Mon Sep 17 00:00:00 2001
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From: Milind Changire <mchangir@redhat.com>
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Date: Mon, 10 Sep 2018 13:48:18 +0530
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Subject: [PATCH 421/444] rpc: handle EAGAIN when SSL_ERROR_SYSCALL is returned
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Problem:
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A return value of ENODATA was forcibly returned in the case where
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SSL_get_error(r) returned SSL_ERROR_SYSCALL. Sometimes SSL_ERROR_SYSCALL
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is a transient error which is identified by setting errno to EAGAIN.
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EAGAIN is not a fatal error and indicates that the syscall needs to be
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retried.
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Solution:
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Bubble up the errno in case SSL_get_error(r) returns SSL_ERROR_SYSCALL
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and let the upper layers handle it appropriately.
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mainline:
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> Reviewed-on: https://review.gluster.org/c/glusterfs/+/20993
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> fixes: bz#1622405
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> Change-Id: I76eff278378930ee79abbf9fa267a7e77356eed6
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> BUG: 1622405
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Change-Id: I76eff278378930ee79abbf9fa267a7e77356eed6
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BUG: 1622308
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Signed-off-by: Milind Changire <mchangir@redhat.com>
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Reviewed-on: https://code.engineering.redhat.com/gerrit/154868
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Tested-by: RHGS Build Bot <nigelb@redhat.com>
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Reviewed-by: Sunil Kumar Heggodu Gopala Acharya <sheggodu@redhat.com>
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---
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rpc/rpc-transport/socket/src/socket.c | 11 +++++++++--
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1 file changed, 9 insertions(+), 2 deletions(-)
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diff --git a/rpc/rpc-transport/socket/src/socket.c b/rpc/rpc-transport/socket/src/socket.c
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index 8a08177..34a937f 100644
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--- a/rpc/rpc-transport/socket/src/socket.c
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+++ b/rpc/rpc-transport/socket/src/socket.c
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@@ -209,6 +209,7 @@ ssl_do (rpc_transport_t *this, void *buf, size_t len, SSL_trinary_func *func)
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int r = (-1);
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struct pollfd pfd = {-1,};
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socket_private_t *priv = NULL;
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+ int myerrno = -1;
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GF_VALIDATE_OR_GOTO(this->name,this->private,out);
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priv = this->private;
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@@ -276,10 +277,16 @@ ssl_do (rpc_transport_t *this, void *buf, size_t len, SSL_trinary_func *func)
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}
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break;
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case SSL_ERROR_SYSCALL:
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+ myerrno = errno;
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/* This is what we get when remote disconnects. */
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gf_log(this->name,GF_LOG_DEBUG,
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- "syscall error (probably remote disconnect)");
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- errno = ENODATA;
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+ "syscall error (probably remote disconnect)"
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+ " errno:%d(%s)", errno, strerror(errno));
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+ /* sometimes, errno is set to EAGAIN in this case
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+ * so let the upper layers do what they need to do
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+ * with it
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+ */
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+ errno = myerrno;
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goto out;
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default:
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errno = EIO;
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--
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1.8.3.1
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