diff options
Diffstat (limited to 'fs/cifs/transport.c')
| -rw-r--r-- | fs/cifs/transport.c | 20 |
1 files changed, 19 insertions, 1 deletions
diff --git a/fs/cifs/transport.c b/fs/cifs/transport.c index 2c7efd26992..0ad3e2d116a 100644 --- a/fs/cifs/transport.c +++ b/fs/cifs/transport.c @@ -199,7 +199,25 @@ smb_sendv(struct TCP_Server_Info *server, struct kvec *iov, int n_vec) n_vec - first_vec, total_len); if ((rc == -ENOSPC) || (rc == -EAGAIN)) { i++; - if (i >= 14) { + /* if blocking send we try 3 times, since each can block + for 5 seconds. For nonblocking we have to try more + but wait increasing amounts of time allowing time for + socket to clear. The overall time we wait in either + case to send on the socket is about 15 seconds. + Similarly we wait for 15 seconds for + a response from the server in SendReceive[2] + for the server to send a response back for + most types of requests (except SMB Write + past end of file which can be slow, and + blocking lock operations). NFS waits slightly longer + than CIFS, but this can make it take longer for + nonresponsive servers to be detected and 15 seconds + is more than enough time for modern networks to + send a packet. In most cases if we fail to send + after the retries we will kill the socket and + reconnect which may clear the network problem. + */ + if ((i >= 14) || (!server->noblocksnd && (i > 2))) { cERROR(1, ("sends on sock %p stuck for 15 seconds", ssocket)); |