extern size_t bwlimit_writemax;
extern int verbose;
extern int io_timeout;
+extern int allowed_lull;
extern int am_server;
extern int am_daemon;
extern int am_sender;
+extern int am_generator;
extern int eol_nulls;
+extern int read_batch;
+extern int csum_length;
extern int checksum_seed;
extern int protocol_version;
-extern char *remote_filesfrom_file;
+extern int remove_sent_files;
+extern int preserve_hard_links;
+extern char *filesfrom_host;
extern struct stats stats;
+extern struct file_list *the_file_list;
const char phase_unknown[] = "unknown";
-int select_timeout = SELECT_TIMEOUT;
+int ignore_timeout = 0;
int batch_fd = -1;
int batch_gen_fd = -1;
const char *io_write_phase = phase_unknown;
const char *io_read_phase = phase_unknown;
-/** Ignore EOF errors while reading a module listing if the remote
- version is 24 or less. */
-int kludge_around_eof = False;
+/* Ignore an EOF error if non-zero. See whine_about_eof(). */
+int kluge_around_eof = 0;
int msg_fd_in = -1;
int msg_fd_out = -1;
+int sock_f_in = -1;
+int sock_f_out = -1;
static int io_multiplexing_out;
static int io_multiplexing_in;
-static int sock_f_in = -1;
-static int sock_f_out = -1;
-static time_t last_io;
+static time_t last_io_in;
+static time_t last_io_out;
static int no_flush;
static int write_batch_monitor_in = -1;
static char *io_filesfrom_bp;
static char io_filesfrom_lastchar;
static int io_filesfrom_buflen;
+static size_t contiguous_write_len = 0;
+static int select_timeout = SELECT_TIMEOUT;
static void read_loop(int fd, char *buf, size_t len);
-struct redo_list {
- struct redo_list *next;
- int num;
+struct flist_ndx_item {
+ struct flist_ndx_item *next;
+ int ndx;
};
-static struct redo_list *redo_list_head;
-static struct redo_list *redo_list_tail;
+struct flist_ndx_list {
+ struct flist_ndx_item *head, *tail;
+};
+
+static struct flist_ndx_list redo_list, hlink_list;
struct msg_list {
struct msg_list *next;
static struct msg_list *msg_list_head;
static struct msg_list *msg_list_tail;
-static void redo_list_add(int num)
+static void flist_ndx_push(struct flist_ndx_list *lp, int ndx)
{
- struct redo_list *rl;
-
- if (!(rl = new(struct redo_list)))
- exit_cleanup(RERR_MALLOC);
- rl->next = NULL;
- rl->num = num;
- if (redo_list_tail)
- redo_list_tail->next = rl;
+ struct flist_ndx_item *item;
+
+ if (!(item = new(struct flist_ndx_item)))
+ out_of_memory("flist_ndx_push");
+ item->next = NULL;
+ item->ndx = ndx;
+ if (lp->tail)
+ lp->tail->next = item;
else
- redo_list_head = rl;
- redo_list_tail = rl;
+ lp->head = item;
+ lp->tail = item;
+}
+
+static int flist_ndx_pop(struct flist_ndx_list *lp)
+{
+ struct flist_ndx_item *next;
+ int ndx;
+
+ if (!lp->head)
+ return -1;
+
+ ndx = lp->head->ndx;
+ next = lp->head->next;
+ free(lp->head);
+ lp->head = next;
+ if (!next)
+ lp->tail = NULL;
+
+ return ndx;
}
static void check_timeout(void)
{
time_t t;
- if (!io_timeout)
+ if (!io_timeout || ignore_timeout)
return;
- if (!last_io) {
- last_io = time(NULL);
+ if (!last_io_in) {
+ last_io_in = time(NULL);
return;
}
t = time(NULL);
- if (t - last_io >= io_timeout) {
+ if (t - last_io_in >= io_timeout) {
if (!am_server && !am_daemon) {
- rprintf(FERROR, "io timeout after %d seconds - exiting\n",
- (int)(t-last_io));
+ rprintf(FERROR, "io timeout after %d seconds -- exiting\n",
+ (int)(t-last_io_in));
}
exit_cleanup(RERR_TIMEOUT);
}
sock_f_out = f_out;
}
-/** Setup the fd used to receive MSG_* messages. Only needed when
- * we're the generator because the sender and receiver both use the
- * multiplexed I/O setup. */
+void set_io_timeout(int secs)
+{
+ io_timeout = secs;
+
+ if (!io_timeout || io_timeout > SELECT_TIMEOUT)
+ select_timeout = SELECT_TIMEOUT;
+ else
+ select_timeout = io_timeout;
+
+ allowed_lull = read_batch ? 0 : (io_timeout + 1) / 2;
+}
+
+/* Setup the fd used to receive MSG_* messages. Only needed during the
+ * early stages of being a local sender (up through the sending of the
+ * file list) or when we're the generator (to fetch the messages from
+ * the receiver). */
void set_msg_fd_in(int fd)
{
msg_fd_in = fd;
}
-/** Setup the fd used to send our MSG_* messages. Only needed when
- * we're the receiver because the generator and the sender both use
- * the multiplexed I/O setup. */
+/* Setup the fd used to send our MSG_* messages. Only needed when
+ * we're the receiver (to send our messages to the generator). */
void set_msg_fd_out(int fd)
{
msg_fd_out = fd;
struct msg_list *ml;
if (!(ml = new(struct msg_list)))
- exit_cleanup(RERR_MALLOC);
+ out_of_memory("msg_list_add");
ml->next = NULL;
if (!(ml->buf = new_array(char, len+4)))
- exit_cleanup(RERR_MALLOC);
+ out_of_memory("msg_list_add");
SIVAL(ml->buf, 0, ((code+MPLEX_BASE)<<24) | len);
memcpy(ml->buf+4, buf, len);
ml->len = len+4;
void send_msg(enum msgcode code, char *buf, int len)
{
+ if (msg_fd_out < 0) {
+ io_multiplex_write(code, buf, len);
+ return;
+ }
msg_list_add(code, buf, len);
msg_list_push(NORMAL_FLUSH);
}
-/** Read a message from the MSG_* fd and dispatch it. This is only
- * called by the generator. */
+/* Read a message from the MSG_* fd and handle it. This is called either
+ * during the early stages of being a local sender (up through the sending
+ * of the file list) or when we're the generator (to fetch the messages
+ * from the receiver). */
static void read_msg_fd(void)
{
char buf[2048];
int tag, len;
/* Temporarily disable msg_fd_in. This is needed to avoid looping back
- * to this routine from read_timeout() and writefd_unbuffered(). */
+ * to this routine from writefd_unbuffered(). */
msg_fd_in = -1;
read_loop(fd, buf, 4);
switch (tag) {
case MSG_DONE:
- if (len != 0) {
+ if (len != 0 || !am_generator) {
rprintf(FERROR, "invalid message %d:%d\n", tag, len);
exit_cleanup(RERR_STREAMIO);
}
- redo_list_add(-1);
+ flist_ndx_push(&redo_list, -1);
break;
case MSG_REDO:
- if (len != 4) {
+ if (len != 4 || !am_generator) {
rprintf(FERROR, "invalid message %d:%d\n", tag, len);
exit_cleanup(RERR_STREAMIO);
}
read_loop(fd, buf, 4);
- redo_list_add(IVAL(buf,0));
+ flist_ndx_push(&redo_list, IVAL(buf,0));
+ break;
+ case MSG_DELETED:
+ if (len >= (int)sizeof buf || !am_generator) {
+ rprintf(FERROR, "invalid message %d:%d\n", tag, len);
+ exit_cleanup(RERR_STREAMIO);
+ }
+ read_loop(fd, buf, len);
+ io_multiplex_write(MSG_DELETED, buf, len);
+ break;
+ case MSG_SUCCESS:
+ if (len != 4 || !am_generator) {
+ rprintf(FERROR, "invalid message %d:%d\n", tag, len);
+ exit_cleanup(RERR_STREAMIO);
+ }
+ read_loop(fd, buf, len);
+ if (remove_sent_files)
+ io_multiplex_write(MSG_SUCCESS, buf, len);
+ if (preserve_hard_links)
+ flist_ndx_push(&hlink_list, IVAL(buf,0));
break;
case MSG_INFO:
case MSG_ERROR:
return 1;
}
-int get_redo_num(void)
+int get_redo_num(int itemizing, enum logcode code)
{
- struct redo_list *next;
- int num;
-
- while (!redo_list_head)
+ while (1) {
+ if (hlink_list.head)
+ check_for_finished_hlinks(itemizing, code);
+ if (redo_list.head)
+ break;
read_msg_fd();
+ }
- num = redo_list_head->num;
- next = redo_list_head->next;
- free(redo_list_head);
- redo_list_head = next;
- if (!next)
- redo_list_tail = NULL;
+ return flist_ndx_pop(&redo_list);
+}
- return num;
+int get_hlink_num(void)
+{
+ return flist_ndx_pop(&hlink_list);
}
/**
io_filesfrom_buflen = 0;
}
-/**
- * It's almost always an error to get an EOF when we're trying to read
- * from the network, because the protocol is self-terminating.
+/* It's almost always an error to get an EOF when we're trying to read from the
+ * network, because the protocol is (for the most part) self-terminating.
*
- * However, there is one unfortunate cases where it is not, which is
- * rsync <2.4.6 sending a list of modules on a server, since the list
- * is terminated by closing the socket. So, for the section of the
- * program where that is a problem (start_socket_client),
- * kludge_around_eof is True and we just exit.
- */
+ * There is one case for the receiver when it is at the end of the transfer
+ * (hanging around reading any keep-alive packets that might come its way): if
+ * the sender dies before the generator's kill-signal comes through, we can end
+ * up here needing to loop until the kill-signal arrives. In this situation,
+ * kluge_around_eof will be < 0.
+ *
+ * There is another case for older protocol versions (< 24) where the module
+ * listing was not terminated, so we must ignore an EOF error in that case and
+ * exit. In this situation, kluge_around_eof will be > 0. */
static void whine_about_eof(int fd)
{
- if (kludge_around_eof && fd == sock_f_in)
- exit_cleanup(0);
+ if (kluge_around_eof && fd == sock_f_in) {
+ int i;
+ if (kluge_around_eof > 0)
+ exit_cleanup(0);
+ /* If we're still here after 10 seconds, exit with an error. */
+ for (i = 10*1000/20; i--; )
+ msleep(20);
+ }
rprintf(FERROR, RSYNC_NAME ": connection unexpectedly closed "
"(%.0f bytes received so far) [%s]\n",
FD_ZERO(&r_fds);
FD_ZERO(&w_fds);
FD_SET(fd, &r_fds);
- if (msg_fd_in >= 0) {
- FD_SET(msg_fd_in, &r_fds);
- if (msg_fd_in > maxfd)
- maxfd = msg_fd_in;
- } else if (msg_list_head) {
+ if (msg_list_head) {
FD_SET(msg_fd_out, &w_fds);
if (msg_fd_out > maxfd)
maxfd = msg_fd_out;
continue;
}
- if (msg_fd_in >= 0 && FD_ISSET(msg_fd_in, &r_fds))
- read_msg_fd();
- else if (msg_list_head && FD_ISSET(msg_fd_out, &w_fds))
+ if (msg_list_head && FD_ISSET(msg_fd_out, &w_fds))
msg_list_push(NORMAL_FLUSH);
if (io_filesfrom_f_out >= 0) {
len -= n;
ret += n;
- if (io_timeout && fd == sock_f_in)
- last_io = time(NULL);
+ if (fd == sock_f_in && io_timeout)
+ last_io_in = time(NULL);
}
return ret;
{
char ch, *s, *eob = fname + MAXPATHLEN - 1;
int cnt;
- int reading_remotely = remote_filesfrom_file != NULL;
+ int reading_remotely = filesfrom_host != NULL;
int nulls = eol_nulls || reading_remotely;
start:
}
+void maybe_flush_socket(void)
+{
+ if (iobuf_out && iobuf_out_cnt && time(NULL) - last_io_out >= 5)
+ io_flush(NORMAL_FLUSH);
+}
+
+
+void maybe_send_keepalive(void)
+{
+ if (time(NULL) - last_io_out >= allowed_lull) {
+ if (!iobuf_out || !iobuf_out_cnt) {
+ if (protocol_version < 29)
+ return; /* there's nothing we can do */
+ write_int(sock_f_out, the_file_list->count);
+ write_shortint(sock_f_out, ITEM_IS_NEW);
+ }
+ if (iobuf_out)
+ io_flush(NORMAL_FLUSH);
+ }
+}
+
+
/**
* Continue trying to read len bytes - don't return until len has been
* read.
{
static size_t remaining;
static size_t iobuf_in_ndx;
+ size_t msg_bytes;
int tag, ret = 0;
- char line[1024];
+#if MAXPATHLEN < 4096
+ char line[4096+1024];
+#else
+ char line[MAXPATHLEN+1024];
+#endif
if (!iobuf_in || fd != sock_f_in)
return read_timeout(fd, buf, len);
read_loop(fd, line, 4);
tag = IVAL(line, 0);
- remaining = tag & 0xFFFFFF;
+ msg_bytes = tag & 0xFFFFFF;
tag = (tag >> 24) - MPLEX_BASE;
switch (tag) {
case MSG_DATA:
- if (remaining > iobuf_in_siz) {
+ if (msg_bytes > iobuf_in_siz) {
if (!(iobuf_in = realloc_array(iobuf_in, char,
- remaining)))
+ msg_bytes)))
out_of_memory("readfd_unbuffered");
- iobuf_in_siz = remaining;
+ iobuf_in_siz = msg_bytes;
}
- read_loop(fd, iobuf_in, remaining);
+ read_loop(fd, iobuf_in, msg_bytes);
+ remaining = msg_bytes;
iobuf_in_ndx = 0;
break;
+ case MSG_DELETED:
+ if (msg_bytes >= sizeof line)
+ goto overflow;
+ read_loop(fd, line, msg_bytes);
+ line[msg_bytes] = '\0';
+ /* A directory name was sent with the trailing null */
+ if (msg_bytes > 0 && !line[msg_bytes-1])
+ log_delete(line, S_IFDIR);
+ else
+ log_delete(line, S_IFREG);
+ break;
+ case MSG_SUCCESS:
+ if (msg_bytes != 4) {
+ rprintf(FERROR, "invalid multi-message %d:%ld [%s]\n",
+ tag, (long)msg_bytes, who_am_i());
+ exit_cleanup(RERR_STREAMIO);
+ }
+ read_loop(fd, line, msg_bytes);
+ successful_send(IVAL(line, 0));
+ break;
case MSG_INFO:
case MSG_ERROR:
- if (remaining >= sizeof line) {
- rprintf(FERROR, "multiplexing overflow %d:%ld\n\n",
- tag, (long)remaining);
+ if (msg_bytes >= sizeof line) {
+ overflow:
+ rprintf(FERROR,
+ "multiplexing overflow %d:%ld [%s]\n",
+ tag, (long)msg_bytes, who_am_i());
exit_cleanup(RERR_STREAMIO);
}
- read_loop(fd, line, remaining);
- rwrite((enum logcode)tag, line, remaining);
- remaining = 0;
+ read_loop(fd, line, msg_bytes);
+ rwrite((enum logcode)tag, line, msg_bytes);
break;
default:
- rprintf(FERROR, "unexpected tag %d\n", tag);
+ rprintf(FERROR, "unexpected tag %d [%s]\n",
+ tag, who_am_i());
exit_cleanup(RERR_STREAMIO);
}
}
}
+int read_shortint(int f)
+{
+ uchar b[2];
+ readfd(f, (char *)b, 2);
+ return (b[1] << 8) + b[0];
+}
+
+
int32 read_int(int f)
{
char b[4];
if ((int32)ret != (int32)0xffffffff)
return ret;
-#ifdef INT64_IS_OFF_T
- if (sizeof (int64) < 8) {
- rprintf(FERROR, "Integer overflow: attempted 64-bit offset\n");
- exit_cleanup(RERR_UNSUPPORTED);
- }
-#endif
+#if SIZEOF_INT64 < 8
+ rprintf(FERROR, "Integer overflow: attempted 64-bit offset\n");
+ exit_cleanup(RERR_UNSUPPORTED);
+#else
readfd(f,b,8);
ret = IVAL(b,0) | (((int64)IVAL(b,4))<<32);
+#endif
return ret;
}
void read_sbuf(int f,char *buf,size_t len)
{
readfd(f, buf, len);
- buf[len] = 0;
+ buf[len] = '\0';
}
-unsigned char read_byte(int f)
+uchar read_byte(int f)
{
- unsigned char c;
+ uchar c;
readfd(f, (char *)&c, 1);
return c;
}
+int read_vstring(int f, char *buf, int bufsize)
+{
+ int len = read_byte(f);
+
+ if (len & 0x80)
+ len = (len & ~0x80) * 0x100 + read_byte(f);
+
+ if (len >= bufsize) {
+ rprintf(FERROR, "over-long vstring received (%d > %d)\n",
+ len, bufsize - 1);
+ return -1;
+ }
+
+ if (len)
+ readfd(f, buf, len);
+ buf[len] = '\0';
+ return len;
+}
+
+/* Populate a sum_struct with values from the socket. This is
+ * called by both the sender and the receiver. */
+void read_sum_head(int f, struct sum_struct *sum)
+{
+ sum->count = read_int(f);
+ sum->blength = read_int(f);
+ if (sum->blength < 0 || sum->blength > MAX_BLOCK_SIZE) {
+ rprintf(FERROR, "Invalid block length %ld [%s]\n",
+ (long)sum->blength, who_am_i());
+ exit_cleanup(RERR_PROTOCOL);
+ }
+ sum->s2length = protocol_version < 27 ? csum_length : (int)read_int(f);
+ if (sum->s2length < 0 || sum->s2length > MD4_SUM_LENGTH) {
+ rprintf(FERROR, "Invalid checksum length %d [%s]\n",
+ sum->s2length, who_am_i());
+ exit_cleanup(RERR_PROTOCOL);
+ }
+ sum->remainder = read_int(f);
+ if (sum->remainder < 0 || sum->remainder > sum->blength) {
+ rprintf(FERROR, "Invalid remainder length %ld [%s]\n",
+ (long)sum->remainder, who_am_i());
+ exit_cleanup(RERR_PROTOCOL);
+ }
+}
+
+/* Send the values from a sum_struct over the socket. Set sum to
+ * NULL if there are no checksums to send. This is called by both
+ * the generator and the sender. */
+void write_sum_head(int f, struct sum_struct *sum)
+{
+ static struct sum_struct null_sum;
+
+ if (sum == NULL)
+ sum = &null_sum;
+
+ write_int(f, sum->count);
+ write_int(f, sum->blength);
+ if (protocol_version >= 27)
+ write_int(f, sum->s2length);
+ write_int(f, sum->remainder);
+}
+
/**
* Sleep after writing to limit I/O bandwidth usage.
/* Write len bytes to the file descriptor fd, looping as necessary to get
- * the job done and also (in the generator) reading any data on msg_fd_in
- * (to avoid deadlock).
+ * the job done and also (in certain circumstnces) reading any data on
+ * msg_fd_in to avoid deadlock.
*
* This function underlies the multiplexing system. The body of the
* application never calls this function directly. */
{
size_t n, total = 0;
fd_set w_fds, r_fds;
- int maxfd, count, ret;
+ int maxfd, count, ret, using_r_fds;
struct timeval tv;
no_flush++;
FD_SET(fd,&w_fds);
maxfd = fd;
- if (msg_fd_in >= 0) {
+ if (msg_fd_in >= 0 && len-total >= contiguous_write_len) {
FD_ZERO(&r_fds);
FD_SET(msg_fd_in,&r_fds);
if (msg_fd_in > maxfd)
maxfd = msg_fd_in;
- }
- if (fd != sock_f_out && iobuf_out_cnt && no_flush == 1) {
- FD_SET(sock_f_out, &w_fds);
- if (sock_f_out > maxfd)
- maxfd = sock_f_out;
- }
+ using_r_fds = 1;
+ } else
+ using_r_fds = 0;
tv.tv_sec = select_timeout;
tv.tv_usec = 0;
errno = 0;
- count = select(maxfd + 1, msg_fd_in >= 0 ? &r_fds : NULL,
+ count = select(maxfd + 1, using_r_fds ? &r_fds : NULL,
&w_fds, NULL, &tv);
if (count <= 0) {
continue;
}
- if (msg_fd_in >= 0 && FD_ISSET(msg_fd_in, &r_fds))
+ if (using_r_fds && FD_ISSET(msg_fd_in, &r_fds))
read_msg_fd();
- if (!FD_ISSET(fd, &w_fds)) {
- if (fd != sock_f_out && iobuf_out_cnt) {
- no_flush--;
- io_flush(NORMAL_FLUSH);
- no_flush++;
- }
+ if (!FD_ISSET(fd, &w_fds))
continue;
- }
n = len - total;
if (bwlimit && n > bwlimit_writemax)
/* If the other side is sending us error messages, try
* to grab any messages they sent before they died. */
while (fd == sock_f_out && io_multiplexing_in) {
- io_timeout = 30;
+ set_io_timeout(30);
+ ignore_timeout = 0;
readfd_unbuffered(sock_f_in, io_filesfrom_buf,
sizeof io_filesfrom_buf);
}
total += ret;
if (fd == sock_f_out) {
- if (io_timeout)
- last_io = time(NULL);
+ if (io_timeout || am_generator)
+ last_io_out = time(NULL);
sleep_for_bwlimit(ret);
}
}
SIVAL(buffer, 0, ((MPLEX_BASE + (int)code)<<24) + len);
+ /* When the generator reads messages from the msg_fd_in pipe, it can
+ * cause output to occur down the socket. Setting contiguous_write_len
+ * prevents the reading of msg_fd_in once we actually start to write
+ * this sequence of data (though we might read it before the start). */
+ if (am_generator && msg_fd_in >= 0)
+ contiguous_write_len = len + 4;
+
if (n > sizeof buffer - 4)
n = sizeof buffer - 4;
if (len)
writefd_unbuffered(sock_f_out, buf, len);
+
+ if (am_generator && msg_fd_in >= 0)
+ contiguous_write_len = 0;
}
}
+void write_shortint(int f, int x)
+{
+ uchar b[2];
+ b[0] = x;
+ b[1] = x >> 8;
+ writefd(f, (char *)b, 2);
+}
+
+
void write_int(int f,int32 x)
{
char b[4];
return;
}
-#ifdef INT64_IS_OFF_T
- if (sizeof (int64) < 8) {
- rprintf(FERROR, "Integer overflow: attempted 64-bit offset\n");
- exit_cleanup(RERR_UNSUPPORTED);
- }
-#endif
-
+#if SIZEOF_INT64 < 8
+ rprintf(FERROR, "Integer overflow: attempted 64-bit offset\n");
+ exit_cleanup(RERR_UNSUPPORTED);
+#else
write_int(f, (int32)0xFFFFFFFF);
SIVAL(b,0,(x&0xFFFFFFFF));
SIVAL(b,4,((x>>32)&0xFFFFFFFF));
writefd(f,b,8);
+#endif
}
void write_buf(int f,char *buf,size_t len)
writefd(f, buf, strlen(buf));
}
-void write_byte(int f,unsigned char c)
+void write_byte(int f, uchar c)
{
writefd(f, (char *)&c, 1);
}
+void write_vstring(int f, char *str, int len)
+{
+ uchar lenbuf[3], *lb = lenbuf;
+
+ if (len > 0x7F) {
+ if (len > 0x7FFF) {
+ rprintf(FERROR,
+ "attempting to send over-long vstring (%d > %d)\n",
+ len, 0x7FFF);
+ exit_cleanup(RERR_PROTOCOL);
+ }
+ *lb++ = len / 0x100 + 0x80;
+ }
+ *lb = len;
+
+ writefd(f, (char*)lenbuf, lb - lenbuf + 1);
+ if (len)
+ writefd(f, str, len);
+}
/**
Matt McCutchen's Web Site / rsync / rsync.git / blobdiff