*/
#include "rsync.h"
-static int64 total_written;
-static int64 total_read;
+/* if no timeout is specified then use a 60 second select timeout */
+#define SELECT_TIMEOUT 60
static int io_multiplexing_out;
static int io_multiplexing_in;
static int eof_error=1;
extern int verbose;
extern int io_timeout;
-
-
-int64 write_total(void)
-{
- return total_written;
-}
-
-int64 read_total(void)
-{
- return total_read;
-}
+extern struct stats stats;
static int buffer_f_in = -1;
t = time(NULL);
- if (last_io && io_timeout && (t-last_io)>io_timeout) {
- rprintf(FERROR,"read timeout after %d second - exiting\n",
+ if (last_io && io_timeout && (t-last_io) >= io_timeout) {
+ rprintf(FERROR,"io timeout after %d second - exiting\n",
(int)(t-last_io));
exit_cleanup(1);
}
static char *read_buffer_p;
static int read_buffer_len;
static int read_buffer_size;
+static int no_flush;
+static int no_flush_read;
/* read from a socket with IO timeout. return the number of
bytes read. If no bytes can be read then exit, never return
{
int n, ret=0;
+ no_flush_read++;
io_flush();
+ no_flush_read--;
while (ret == 0) {
fd_set fds;
FD_ZERO(&fds);
FD_SET(fd, &fds);
- tv.tv_sec = io_timeout;
+ tv.tv_sec = io_timeout?io_timeout:SELECT_TIMEOUT;
tv.tv_usec = 0;
- if (select(fd+1, &fds, NULL, NULL,
- io_timeout?&tv:NULL) != 1) {
+ if (select(fd+1, &fds, NULL, NULL, &tv) != 1) {
check_timeout();
continue;
}
n = read(fd, buf, len);
if (n > 0) {
+ stats.total_read += n;
buf += n;
len -= n;
ret += n;
continue;
}
+ if (n == -1 &&
+ (errno == EAGAIN || errno == EWOULDBLOCK)) {
+ /* this shouldn't happen, if it does then
+ sleep for a short time to prevent us
+ chewing too much CPU */
+ u_sleep(100);
+ continue;
+ }
+
if (n == 0) {
if (eof_error) {
- rprintf(FERROR,"EOF in read_timeout\n");
+ rprintf(FERROR,"unexpected EOF in read_timeout\n");
}
exit_cleanup(1);
}
}
}
-/* read from the file descriptor handing multiplexing -
+/* read from the file descriptor handling multiplexing -
return number of bytes read
never return <= 0 */
static int read_unbuffered(int fd, char *buf, int len)
if (n > (read_buffer_size - read_buffer_len)) {
read_buffer_size += n;
- if (!read_buffer)
- read_buffer = (char *)malloc(read_buffer_size);
- else
- read_buffer = (char *)realloc(read_buffer,read_buffer_size);
+ read_buffer = (char *)Realloc(read_buffer,read_buffer_size);
if (!read_buffer) out_of_memory("read check");
read_buffer_p = read_buffer;
}
int ret;
int total=0;
- if (read_buffer_len < N && N < 1024) {
+ if ((read_buffer_len < N) && (N < 1024)) {
read_check(buffer_f_in);
}
continue;
}
+ no_flush_read++;
io_flush();
+ no_flush_read--;
ret = read_unbuffered(fd,buffer + total,N-total);
total += ret;
{
char b[4];
readfd(f,b,4);
- total_read += 4;
return IVAL(b,0);
}
#else
if (remote_version >= 16) {
readfd(f,b,8);
- total_read += 8;
ret = IVAL(b,0) | (((int64)IVAL(b,4))<<32);
}
#endif
void read_buf(int f,char *buf,int len)
{
readfd(f,buf,len);
- total_read += len;
}
void read_sbuf(int f,char *buf,int len)
fd_set w_fds, r_fds;
int fd_count, count;
struct timeval tv;
- int reading;
+ int reading=0;
+ int blocked=0;
- reading = (buffer_f_in != -1 && read_buffer_len < MAX_READ_BUFFER);
+ no_flush++;
while (total < len) {
FD_ZERO(&w_fds);
FD_SET(fd,&w_fds);
fd_count = fd+1;
+ if (!no_flush_read) {
+ reading = (buffer_f_in != -1 &&
+ read_buffer_len < MAX_READ_BUFFER);
+ }
+
if (reading) {
FD_SET(buffer_f_in,&r_fds);
if (buffer_f_in > fd)
fd_count = buffer_f_in+1;
}
- tv.tv_sec = io_timeout;
+ tv.tv_sec = io_timeout?io_timeout:SELECT_TIMEOUT;
tv.tv_usec = 0;
count = select(fd_count,
reading?&r_fds:NULL,
&w_fds,NULL,
- io_timeout?&tv:NULL);
+ &tv);
if (count <= 0) {
check_timeout();
continue;
}
+ if (reading && FD_ISSET(buffer_f_in, &r_fds)) {
+ read_check(buffer_f_in);
+ }
+
if (FD_ISSET(fd, &w_fds)) {
- int ret = write(fd,buf+total,len-total);
+ int n = (len-total)>>blocked;
+ int ret = write(fd,buf+total,n?n:1);
if (ret == -1 && errno == EINTR) {
continue;
}
+ if (ret == -1 &&
+ (errno == EAGAIN || errno == EWOULDBLOCK)) {
+ blocked++;
+ continue;
+ }
+
if (ret <= 0) {
rprintf(FERROR,"erroring writing %d bytes - exiting\n", len);
exit_cleanup(1);
}
+ blocked = 0;
total += ret;
+ stats.total_written += ret;
+
if (io_timeout)
last_io = time(NULL);
- continue;
- }
-
- if (reading && FD_ISSET(buffer_f_in, &r_fds)) {
- read_check(buffer_f_in);
}
}
+
+ no_flush--;
}
void io_flush(void)
{
int fd = multiplex_out_fd;
- if (!io_buffer_count) return;
+ if (!io_buffer_count || no_flush) return;
if (io_multiplexing_out) {
SIVAL(io_buffer-4, 0, (MPLEX_BASE<<24) + io_buffer_count);
char b[4];
SIVAL(b,0,x);
writefd(f,b,4);
- total_written += 4;
}
void write_longint(int f, int64 x)
SIVAL(b,4,((x>>32)&0xFFFFFFFF));
writefd(f,b,8);
- total_written += 8;
}
void write_buf(int f,char *buf,int len)
{
writefd(f,buf,len);
- total_written += len;
}
/* write a string to the connection */