From 4f36ed513cc8fc3fe780b23ecda8cb1fdc6edf7d Mon Sep 17 00:00:00 2001 From: Emmanuel Vadot Date: Mon, 13 Dec 2021 10:35:23 +0100 Subject: [PATCH] loader: tftp: Don't let tftp timeout When we load a kernel or module we open/close it a few times. Since we're using the same port number each time and that we requested the same file the ACK that we send are valid on the server side and the server send us the file multiple times. This makes tftp loading time very inconsistant due to the UDP "flood" that we have to process. Reviewed by: imp, tsoome MFC after: 2 weeks Sponsored by: Beckhoff Automation GmbH & Co. KG Differential Revision: https://reviews.freebsd.org/D33407 --- stand/libsa/tftp.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/stand/libsa/tftp.c b/stand/libsa/tftp.c index 78eedddcb1f6..dcfce29a9968 100644 --- a/stand/libsa/tftp.c +++ b/stand/libsa/tftp.c @@ -114,6 +114,8 @@ struct tftp_handle { unsigned long tftp_tsize; void *pkt; struct tftphdr *tftp_hdr; + char *tftp_cache; + bool lastacksent; }; struct tftprecv_extra { @@ -378,6 +380,7 @@ tftp_makereq(struct tftp_handle *h) if (res < h->tftp_blksize) { h->islastblock = 1; /* very short file */ tftp_sendack(h, h->currblock); + h->lastacksent = true; } return (0); } @@ -594,7 +597,8 @@ tftp_close(struct open_file *f) struct tftp_handle *tftpfile; tftpfile = f->f_fsdata; - /* let it time out ... */ + if (tftpfile->lastacksent == false) + tftp_senderr(tftpfile, 0, "No error: file closed"); if (tftpfile) { free(tftpfile->path);