From c1b408d0c9d836e0a95d1e0695c0c6c605ceb368 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Herv=C3=A9=20Poussineau?= Date: Mon, 10 Sep 2012 20:52:25 +0200 Subject: [PATCH] slirp: improve TFTP performance MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit When transferring a file, keep it open during the whole transfer, instead of opening/closing it for each block. Signed-off-by: Hervé Poussineau Reviewed-by: Aurelien Jarno Signed-off-by: Jan Kiszka (cherry picked from commit 78be056628c76ff73eedeade86fde44b97343c79) Signed-off-by: Michael Roth --- slirp/tftp.c | 32 ++++++++++++++++++-------------- slirp/tftp.h | 1 + 2 files changed, 19 insertions(+), 14 deletions(-) diff --git a/slirp/tftp.c b/slirp/tftp.c index b78765f..520dbd6 100644 --- a/slirp/tftp.c +++ b/slirp/tftp.c @@ -37,6 +37,10 @@ static inline void tftp_session_update(struct tftp_session *spt) static void tftp_session_terminate(struct tftp_session *spt) { + if (spt->fd >= 0) { + close(spt->fd); + spt->fd = -1; + } g_free(spt->filename); spt->slirp = NULL; } @@ -54,7 +58,7 @@ static int tftp_session_allocate(Slirp *slirp, struct tftp_t *tp) /* sessions time out after 5 inactive seconds */ if ((int)(curtime - spt->timestamp) > 5000) { - g_free(spt->filename); + tftp_session_terminate(spt); goto found; } } @@ -64,6 +68,7 @@ static int tftp_session_allocate(Slirp *slirp, struct tftp_t *tp) found: memset(spt, 0, sizeof(*spt)); memcpy(&spt->client_ip, &tp->ip.ip_src, sizeof(spt->client_ip)); + spt->fd = -1; spt->client_port = tp->udp.uh_sport; spt->slirp = slirp; @@ -95,24 +100,23 @@ static int tftp_session_find(Slirp *slirp, struct tftp_t *tp) static int tftp_read_data(struct tftp_session *spt, uint16_t block_nr, uint8_t *buf, int len) { - int fd; - int bytes_read = 0; - - fd = open(spt->filename, O_RDONLY | O_BINARY); + int bytes_read = 0; - if (fd < 0) { - return -1; - } + if (spt->fd < 0) { + spt->fd = open(spt->filename, O_RDONLY | O_BINARY); + } - if (len) { - lseek(fd, block_nr * 512, SEEK_SET); + if (spt->fd < 0) { + return -1; + } - bytes_read = read(fd, buf, len); - } + if (len) { + lseek(spt->fd, block_nr * 512, SEEK_SET); - close(fd); + bytes_read = read(spt->fd, buf, len); + } - return bytes_read; + return bytes_read; } static int tftp_send_oack(struct tftp_session *spt, diff --git a/slirp/tftp.h b/slirp/tftp.h index 72e5e91..9c364ea 100644 --- a/slirp/tftp.h +++ b/slirp/tftp.h @@ -33,6 +33,7 @@ struct tftp_t { struct tftp_session { Slirp *slirp; char *filename; + int fd; struct in_addr client_ip; uint16_t client_port; -- 1.7.12.1