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cifs: Handle -EINPROGRESS only when noblockcnt is set

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We only want to avoid blocking in connect when mounting SMB root
filesystems, otherwise bail out from generic_ip_connect() so cifs.ko
can perform any reconnect failover appropriately.

This fixes DFS failover/reconnection tests in upstream buildbot.

Fixes: 8eecd1c2e5 ("cifs: Add support for root file systems")
Signed-off-by: Paulo Alcantara (SUSE) <pc@cjr.nz>
Signed-off-by: Steve French <stfrench@microsoft.com>
This commit is contained in:
Paulo Alcantara (SUSE) 2019-10-10 12:31:58 -03:00 committed by Steve French
parent 7d194c2100
commit d532cc7efd
1 changed files with 6 additions and 2 deletions
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8
fs/cifs/connect.c
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@ -3882,8 +3882,12 @@ generic_ip_connect(struct TCP_Server_Info *server)
rc = socket->ops->connect(socket, saddr, slen,
server->noblockcnt ? O_NONBLOCK : 0);
if (rc == -EINPROGRESS)
/*
* When mounting SMB root file systems, we do not want to block in
* connect. Otherwise bail out and then let cifs_reconnect() perform
* reconnect failover - if possible.
*/
if (server->noblockcnt && rc == -EINPROGRESS)
rc = 0;
if (rc < 0) {
cifs_dbg(FYI, "Error %d connecting to server\n", rc);