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slirp: improve TFTP performance 

When transferring a file, keep it open during the whole transfer,
instead of opening/closing it for each block.

Signed-off-by: Hervé Poussineau <hpoussin@reactos.org>
Reviewed-by: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
This commit is contained in:
Hervé Poussineau 2012-09-10 20:52:25 +02:00 committed by Jan Kiszka
parent e56afbc54a
commit 78be056628
2 changed files with 19 additions and 14 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

32
slirp/tftp.c
View File

@ -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;
int bytes_read = 0;
fd = open(spt->filename, O_RDONLY | O_BINARY);
if (spt->fd < 0) {
spt->fd = open(spt->filename, O_RDONLY | O_BINARY);
}
if (fd < 0) {
return -1;
}
if (spt->fd < 0) {
return -1;
}
if (len) {
lseek(fd, block_nr * 512, SEEK_SET);
if (len) {
lseek(spt->fd, block_nr * 512, SEEK_SET);
bytes_read = read(fd, buf, len);
}
bytes_read = read(spt->fd, buf, len);
}
close(fd);
return bytes_read;
return bytes_read;
}
static int tftp_send_oack(struct tftp_session *spt,

1
slirp/tftp.h
View File

@ -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;