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/*
* Routines only used by the sending process.
*
* Copyright (C) 1996 Andrew Tridgell
* Copyright (C) 1996 Paul Mackerras
* Copyright (C) 2003-2014 Wayne Davison
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, visit the http://fsf.org website.
*/
#include "rsync.h"
#include "inums.h"
extern int do_xfers;
extern int am_server;
extern int am_daemon;
extern int inc_recurse;
extern int log_before_transfer;
extern int stdout_format_has_i;
extern int logfile_format_has_i;
extern int want_xattr_optim;
extern int csum_length;
extern int append_mode;
extern int io_error;
extern int flist_eof;
extern int allowed_lull;
extern int preserve_xattrs;
extern int protocol_version;
extern int remove_source_files;
extern int updating_basis_file;
extern int make_backups;
extern int inplace;
extern int batch_fd;
extern int write_batch;
extern int file_old_total;
extern struct stats stats;
extern struct file_list *cur_flist, *first_flist, *dir_flist;
BOOL extra_flist_sending_enabled;
/**
* @file
*
* The sender gets checksums from the generator, calculates deltas,
* and transmits them to the receiver. The sender process runs on the
* machine holding the source files.
**/
/**
* Receive the checksums for a buffer
**/
static struct sum_struct *receive_sums(int f)
{
struct sum_struct *s;
int32 i;
int lull_mod = protocol_version >= 31 ? 0 : allowed_lull * 5;
OFF_T offset = 0;
if (!(s = new(struct sum_struct)))
out_of_memory("receive_sums");
read_sum_head(f, s);
s->sums = NULL;
if (DEBUG_GTE(DELTASUM, 3)) {
rprintf(FINFO, "count=%s n=%ld rem=%ld\n",
big_num(s->count), (long)s->blength, (long)s->remainder);
}
if (append_mode > 0) {
s->flength = (OFF_T)s->count * s->blength;
if (s->remainder)
s->flength -= s->blength - s->remainder;
return s;
}
if (s->count == 0)
return(s);
if (!(s->sums = new_array(struct sum_buf, s->count)))
out_of_memory("receive_sums");
for (i = 0; i < s->count; i++) {
s->sums[i].sum1 = read_int(f);
read_buf(f, s->sums[i].sum2, s->s2length);
s->sums[i].offset = offset;
s->sums[i].flags = 0;
if (i == s->count-1 && s->remainder != 0)
s->sums[i].len = s->remainder;
else
s->sums[i].len = s->blength;
offset += s->sums[i].len;
if (lull_mod && !(i % lull_mod))
maybe_send_keepalive(time(NULL), True);
if (DEBUG_GTE(DELTASUM, 3)) {
rprintf(FINFO,
"chunk[%d] len=%d offset=%s sum1=%08x\n",
i, s->sums[i].len, big_num(s->sums[i].offset),
s->sums[i].sum1);
}
}
s->flength = offset;
return s;
}
void successful_send(int ndx)
{
char fname[MAXPATHLEN];
char *failed_op;
struct file_struct *file;
struct file_list *flist;
STRUCT_STAT st;
if (!remove_source_files)
return;
flist = flist_for_ndx(ndx, "successful_send");
file = flist->files[ndx - flist->ndx_start];
if (!change_pathname(file, NULL, 0))
return;
f_name(file, fname);
if (do_lstat(fname, &st) < 0) {
failed_op = "re-lstat";
goto failed;
}
if (st.st_size != F_LENGTH(file) || st.st_mtime != file->modtime
#ifdef ST_MTIME_NSEC
|| (NSEC_BUMP(file) && (uint32)st.ST_MTIME_NSEC != F_MOD_NSEC(file))
#endif
) {
rprintf(FERROR_XFER, "ERROR: Skipping sender remove for changed file: %s\n", fname);
return;
}
if (do_unlink(fname) < 0) {
failed_op = "remove";
failed:
if (errno == ENOENT)
rprintf(FINFO, "sender file already removed: %s\n", fname);
else
rsyserr(FERROR_XFER, errno, "sender failed to %s %s", failed_op, fname);
} else {
if (INFO_GTE(REMOVE, 1))
rprintf(FINFO, "sender removed %s\n", fname);
}
}
static void write_ndx_and_attrs(int f_out, int ndx, int iflags,
const char *fname, struct file_struct *file,
uchar fnamecmp_type, char *buf, int len)
{
write_ndx(f_out, ndx);
if (protocol_version < 29)
return;
write_shortint(f_out, iflags);
if (iflags & ITEM_BASIS_TYPE_FOLLOWS)
write_byte(f_out, fnamecmp_type);
if (iflags & ITEM_XNAME_FOLLOWS)
write_vstring(f_out, buf, len);
#ifdef SUPPORT_XATTRS
if (preserve_xattrs && iflags & ITEM_REPORT_XATTR && do_xfers
&& !(want_xattr_optim && BITS_SET(iflags, ITEM_XNAME_FOLLOWS|ITEM_LOCAL_CHANGE)))
send_xattr_request(fname, file, f_out);
#endif
}
void send_files(int f_in, int f_out)
{
int fd = -1;
struct sum_struct *s;
struct map_struct *mbuf = NULL;
STRUCT_STAT st;
char fname[MAXPATHLEN], xname[MAXPATHLEN];
const char *path, *slash;
uchar fnamecmp_type;
int iflags, xlen;
struct file_struct *file;
int phase = 0, max_phase = protocol_version >= 29 ? 2 : 1;
int itemizing = am_server ? logfile_format_has_i : stdout_format_has_i;
enum logcode log_code = log_before_transfer ? FLOG : FINFO;
int f_xfer = write_batch < 0 ? batch_fd : f_out;
int save_io_error = io_error;
int ndx, j;
if (DEBUG_GTE(SEND, 1))
rprintf(FINFO, "send_files starting\n");
while (1) {
if (inc_recurse) {
send_extra_file_list(f_out, MIN_FILECNT_LOOKAHEAD);
extra_flist_sending_enabled = !flist_eof;
}
/* This call also sets cur_flist. */
ndx = read_ndx_and_attrs(f_in, f_out, &iflags, &fnamecmp_type,
xname, &xlen);
extra_flist_sending_enabled = False;
if (ndx == NDX_DONE) {
if (!am_server && INFO_GTE(PROGRESS, 2) && cur_flist) {
set_current_file_index(NULL, 0);
end_progress(0);
}
if (inc_recurse && first_flist) {
file_old_total -= first_flist->used;
flist_free(first_flist);
if (first_flist) {
if (first_flist == cur_flist)
file_old_total = cur_flist->used;
write_ndx(f_out, NDX_DONE);
continue;
}
}
if (++phase > max_phase)
break;
if (DEBUG_GTE(SEND, 1))
rprintf(FINFO, "send_files phase=%d\n", phase);
write_ndx(f_out, NDX_DONE);
continue;
}
if (inc_recurse)
send_extra_file_list(f_out, MIN_FILECNT_LOOKAHEAD);
if (ndx - cur_flist->ndx_start >= 0)
file = cur_flist->files[ndx - cur_flist->ndx_start];
else
file = dir_flist->files[cur_flist->parent_ndx];
if (F_PATHNAME(file)) {
path = F_PATHNAME(file);
slash = "/";
} else {
path = slash = "";
}
if (!change_pathname(file, NULL, 0))
continue;
f_name(file, fname);
if (DEBUG_GTE(SEND, 1))
rprintf(FINFO, "send_files(%d, %s%s%s)\n", ndx, path,slash,fname);
#ifdef SUPPORT_XATTRS
if (preserve_xattrs && iflags & ITEM_REPORT_XATTR && do_xfers
&& !(want_xattr_optim && BITS_SET(iflags, ITEM_XNAME_FOLLOWS|ITEM_LOCAL_CHANGE)))
recv_xattr_request(file, f_in);
#endif
if (!(iflags & ITEM_TRANSFER)) {
maybe_log_item(file, iflags, itemizing, xname);
write_ndx_and_attrs(f_out, ndx, iflags, fname, file,
fnamecmp_type, xname, xlen);
if (iflags & ITEM_IS_NEW) {
stats.created_files++;
if (S_ISREG(file->mode)) {
/* Nothing further to count. */
} else if (S_ISDIR(file->mode))
stats.created_dirs++;
#ifdef SUPPORT_LINKS
else if (S_ISLNK(file->mode))
stats.created_symlinks++;
#endif
else if (IS_DEVICE(file->mode))
stats.created_devices++;
else
stats.created_specials++;
}
continue;
}
if (phase == 2) {
rprintf(FERROR,
"got transfer request in phase 2 [%s]\n",
who_am_i());
exit_cleanup(RERR_PROTOCOL);
}
if (file->flags & FLAG_FILE_SENT) {
if (csum_length == SHORT_SUM_LENGTH) {
/* For inplace: redo phase turns off the backup
* flag so that we do a regular inplace send. */
make_backups = -make_backups;
append_mode = -append_mode;
csum_length = SUM_LENGTH;
}
} else {
if (csum_length != SHORT_SUM_LENGTH) {
make_backups = -make_backups;
append_mode = -append_mode;
csum_length = SHORT_SUM_LENGTH;
}
if (iflags & ITEM_IS_NEW)
stats.created_files++;
}
updating_basis_file = inplace && (protocol_version >= 29
? fnamecmp_type == FNAMECMP_FNAME : make_backups <= 0);
if (!am_server && INFO_GTE(PROGRESS, 1))
set_current_file_index(file, ndx);
stats.xferred_files++;
stats.total_transferred_size += F_LENGTH(file);
if (!log_before_transfer)
remember_initial_stats();
if (!do_xfers) { /* log the transfer */
log_item(FCLIENT, file, iflags, NULL);
write_ndx_and_attrs(f_out, ndx, iflags, fname, file,
fnamecmp_type, xname, xlen);
continue;
}
if (!(s = receive_sums(f_in))) {
io_error |= IOERR_GENERAL;
rprintf(FERROR_XFER, "receive_sums failed\n");
exit_cleanup(RERR_PROTOCOL);
}
fd = do_open(fname, O_RDONLY, 0);
if (fd == -1) {
if (errno == ENOENT) {
enum logcode c = am_daemon
&& protocol_version < 28 ? FERROR
: FWARNING;
io_error |= IOERR_VANISHED;
rprintf(c, "file has vanished: %s\n",
full_fname(fname));
} else {
io_error |= IOERR_GENERAL;
rsyserr(FERROR_XFER, errno,
"send_files failed to open %s",
full_fname(fname));
}
free_sums(s);
if (protocol_version >= 30)
send_msg_int(MSG_NO_SEND, ndx);
continue;
}
/* map the local file */
if (do_fstat(fd, &st) != 0) {
io_error |= IOERR_GENERAL;
rsyserr(FERROR_XFER, errno, "fstat failed");
free_sums(s);
close(fd);
exit_cleanup(RERR_FILEIO);
}
if (st.st_size) {
int32 read_size = MAX(s->blength * 3, MAX_MAP_SIZE);
mbuf = map_file(fd, st.st_size, read_size, s->blength);
} else
mbuf = NULL;
if (DEBUG_GTE(DELTASUM, 2)) {
rprintf(FINFO, "send_files mapped %s%s%s of size %s\n",
path,slash,fname, big_num(st.st_size));
}
write_ndx_and_attrs(f_out, ndx, iflags, fname, file,
fnamecmp_type, xname, xlen);
write_sum_head(f_xfer, s);
if (DEBUG_GTE(DELTASUM, 2))
rprintf(FINFO, "calling match_sums %s%s%s\n", path,slash,fname);
if (log_before_transfer)
log_item(FCLIENT, file, iflags, NULL);
else if (!am_server && INFO_GTE(NAME, 1) && INFO_EQ(PROGRESS, 1))
rprintf(FCLIENT, "%s\n", fname);
set_compression(fname);
match_sums(f_xfer, s, mbuf, st.st_size);
if (INFO_GTE(PROGRESS, 1))
end_progress(st.st_size);
log_item(log_code, file, iflags, NULL);
if (mbuf) {
j = unmap_file(mbuf);
if (j) {
io_error |= IOERR_GENERAL;
rsyserr(FERROR_XFER, j,
"read errors mapping %s",
full_fname(fname));
}
}
close(fd);
free_sums(s);
if (DEBUG_GTE(SEND, 1))
rprintf(FINFO, "sender finished %s%s%s\n", path,slash,fname);
/* Flag that we actually sent this entry. */
file->flags |= FLAG_FILE_SENT;
}
if (make_backups < 0)
make_backups = -make_backups;
if (io_error != save_io_error && protocol_version >= 30)
send_msg_int(MSG_IO_ERROR, io_error);
if (DEBUG_GTE(SEND, 1))
rprintf(FINFO, "send files finished\n");
match_report();
write_ndx(f_out, NDX_DONE);
}