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- Implemented a protocol independent way to specify blocking direction, used by

Browse Source 
transfer.c for blocking. It is currently used only by SCP and SFTP protocols.
  This enhancement resolves an issue with 100% CPU usage during SFTP upload,
  reported by Vourhey.
This commit is contained in:
Kamil Dudka 2009-09-26 08:31:48 +00:00
parent af9ce990f0
commit 66fcebdc9e
4 changed files with 47 additions and 18 deletions
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6
CHANGES
View File

@ -6,6 +6,12 @@
Changelog
Kamil Dudka (26 Sep 2009)
- Implemented a protocol independent way to specify blocking direction, used by
transfer.c for blocking. It is currently used only by SCP and SFTP protocols.
This enhancement resolves an issue with 100% CPU usage during SFTP upload,
reported by Vourhey.
Daniel Stenberg (25 Sep 2009)
- Chris Mumford filed bug report #2861587
(http://curl.haxx.se/bug/view.cgi?id=2861587) identifying that libcurl used

30
lib/ssh.c
View File

@ -1500,6 +1500,9 @@ static CURLcode ssh_statemach_act(struct connectdata *conn, bool *block)
result = Curl_setup_transfer(conn, -1, -1, FALSE, NULL,
FIRSTSOCKET, NULL);
/* not set by Curl_setup_transfer to preserve keepon bits */
conn->sockfd = conn->writesockfd;
if(result) {
state(conn, SSH_SFTP_CLOSE);
sshc->actualcode = result;
@ -1911,6 +1914,12 @@ static CURLcode ssh_statemach_act(struct connectdata *conn, bool *block)
else {
result = Curl_setup_transfer(conn, FIRSTSOCKET, data->req.size,
FALSE, NULL, -1, NULL);
/* not set by Curl_setup_transfer to preserve keepon bits */
conn->writesockfd = conn->sockfd;
/* FIXME: here should be explained why we need it to start the download */
conn->cselect_bits = CURL_CSELECT_IN;
}
if(result) {
state(conn, SSH_SFTP_CLOSE);
@ -2031,6 +2040,9 @@ static CURLcode ssh_statemach_act(struct connectdata *conn, bool *block)
result = Curl_setup_transfer(conn, -1, data->req.size, FALSE, NULL,
FIRSTSOCKET, NULL);
/* not set by Curl_setup_transfer to preserve keepon bits */
conn->sockfd = conn->writesockfd;
if(result) {
state(conn, SSH_SCP_CHANNEL_FREE);
sshc->actualcode = result;
@ -2080,6 +2092,12 @@ static CURLcode ssh_statemach_act(struct connectdata *conn, bool *block)
result = Curl_setup_transfer(conn, FIRSTSOCKET,
bytecount, FALSE, NULL, -1, NULL);
/* not set by Curl_setup_transfer to preserve keepon bits */
conn->writesockfd = conn->sockfd;
/* FIXME: here should be explained why we need it to start the download */
conn->cselect_bits = CURL_CSELECT_IN;
if(result) {
state(conn, SSH_SCP_CHANNEL_FREE);
sshc->actualcode = result;
@ -2232,10 +2250,10 @@ static int ssh_perform_getsock(const struct connectdata *conn,
sock[0] = conn->sock[FIRSTSOCKET];
if(conn->proto.sshc.waitfor & KEEP_RECV)
if(conn->waitfor & KEEP_RECV)
bitmap |= GETSOCK_READSOCK(FIRSTSOCKET);
if(conn->proto.sshc.waitfor & KEEP_SEND)
if(conn->waitfor & KEEP_SEND)
bitmap |= GETSOCK_WRITESOCK(FIRSTSOCKET);
return bitmap;
@ -2279,15 +2297,17 @@ static void ssh_block2waitfor(struct connectdata *conn, bool block)
{
struct ssh_conn *sshc = &conn->proto.sshc;
int dir;
if(block && (dir = libssh2_session_block_directions(sshc->ssh_session))) {
if(!block)
conn->waitfor = 0;
else if((dir = libssh2_session_block_directions(sshc->ssh_session))) {
/* translate the libssh2 define bits into our own bit defines */
sshc->waitfor = ((dir&LIBSSH2_SESSION_BLOCK_INBOUND)?KEEP_RECV:0) |
conn->waitfor = ((dir&LIBSSH2_SESSION_BLOCK_INBOUND)?KEEP_RECV:0) |
((dir&LIBSSH2_SESSION_BLOCK_OUTBOUND)?KEEP_SEND:0);
}
else
/* It didn't block or libssh2 didn't reveal in which direction, put back
the original set */
sshc->waitfor = sshc->orig_waitfor;
conn->waitfor = sshc->orig_waitfor;
}
#else
/* no libssh2 directional support so we simply don't know */

26
lib/transfer.c
View File

@ -1652,10 +1652,6 @@ CURLcode Curl_readwrite(struct connectdata *conn,
if((k->keepon & KEEP_RECVBITS) == KEEP_RECV) {
fd_read = conn->sockfd;
#if defined(USE_LIBSSH2)
if(conn->protocol & (PROT_SCP|PROT_SFTP))
select_res |= CURL_CSELECT_IN;
#endif /* USE_LIBSSH2 */
} else
fd_read = CURL_SOCKET_BAD;
@ -1884,33 +1880,39 @@ Transfer(struct connectdata *conn)
return CURLE_OK;
while(!done) {
curl_socket_t fd_read;
curl_socket_t fd_write;
curl_socket_t fd_read = conn->sockfd;
curl_socket_t fd_write = conn->writesockfd;
int keepon = k->keepon;
if(conn->waitfor) {
/* if waitfor is set, get the RECV and SEND bits from that but keep the
other bits */
keepon &= ~ (KEEP_RECV|KEEP_SEND);
keepon |= conn->waitfor & (KEEP_RECV|KEEP_SEND);
}
/* limit-rate logic: if speed exceeds threshold, then do not include fd in
select set. The current speed is recalculated in each Curl_readwrite()
call */
if((k->keepon & KEEP_SEND) &&
if((keepon & KEEP_SEND) &&
(!data->set.max_send_speed ||
(data->progress.ulspeed < data->set.max_send_speed) )) {
fd_write = conn->writesockfd;
k->keepon &= ~KEEP_SEND_HOLD;
}
else {
fd_write = CURL_SOCKET_BAD;
if(k->keepon & KEEP_SEND)
if(keepon & KEEP_SEND)
k->keepon |= KEEP_SEND_HOLD; /* hold it */
}
if((k->keepon & KEEP_RECV) &&
if((keepon & KEEP_RECV) &&
(!data->set.max_recv_speed ||
(data->progress.dlspeed < data->set.max_recv_speed)) ) {
fd_read = conn->sockfd;
k->keepon &= ~KEEP_RECV_HOLD;
}
else {
fd_read = CURL_SOCKET_BAD;
if(k->keepon & KEEP_RECV)
if(keepon & KEEP_RECV)
k->keepon |= KEEP_RECV_HOLD; /* hold it */
}

3
lib/urldata.h
View File

@ -568,7 +568,6 @@ struct ssh_conn {
LIBSSH2_CHANNEL *ssh_channel; /* Secure Shell channel handle */
LIBSSH2_SFTP *sftp_session; /* SFTP handle */
LIBSSH2_SFTP_HANDLE *sftp_handle;
int waitfor; /* current READ/WRITE bits to wait for */
int orig_waitfor; /* default READ/WRITE bits wait for */
/* note that HAVE_LIBSSH2_KNOWNHOST_API is a define set in the libssh2.h
@ -1075,6 +1074,8 @@ struct connectdata {
} proto;
int cselect_bits; /* bitmask of socket events */
int waitfor; /* current READ/WRITE bits to wait for */
#if defined(HAVE_GSSAPI) || defined(USE_WINDOWS_SSPI)
int socks5_gssapi_enctype;
#endif