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d8cc8daef9
need...but most of it remains.
431 lines
11 KiB
C
431 lines
11 KiB
C
/*
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* Routines only used by the sending process.
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*
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* Copyright (C) 1996 Andrew Tridgell
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* Copyright (C) 1996 Paul Mackerras
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* Copyright (C) 2003-2014 Wayne Davison
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, visit the http://fsf.org website.
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*/
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#include "rsync.h"
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#include "inums.h"
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extern int do_xfers;
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extern int am_server;
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extern int am_daemon;
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extern int inc_recurse;
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extern int log_before_transfer;
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extern int stdout_format_has_i;
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extern int logfile_format_has_i;
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extern int want_xattr_optim;
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extern int csum_length;
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extern int append_mode;
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extern int io_error;
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extern int flist_eof;
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extern int allowed_lull;
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extern int preserve_xattrs;
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extern int protocol_version;
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extern int remove_source_files;
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extern int updating_basis_file;
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extern int make_backups;
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extern int inplace;
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extern int batch_fd;
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extern int write_batch;
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extern int file_old_total;
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extern struct stats stats;
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extern struct file_list *cur_flist, *first_flist, *dir_flist;
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BOOL extra_flist_sending_enabled;
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/**
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* @file
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*
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* The sender gets checksums from the generator, calculates deltas,
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* and transmits them to the receiver. The sender process runs on the
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* machine holding the source files.
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**/
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/**
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* Receive the checksums for a buffer
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**/
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static struct sum_struct *receive_sums(int f)
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{
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struct sum_struct *s;
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int32 i;
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int lull_mod = protocol_version >= 31 ? 0 : allowed_lull * 5;
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OFF_T offset = 0;
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if (!(s = new(struct sum_struct)))
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out_of_memory("receive_sums");
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read_sum_head(f, s);
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s->sums = NULL;
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if (DEBUG_GTE(DELTASUM, 3)) {
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rprintf(FINFO, "count=%s n=%ld rem=%ld\n",
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big_num(s->count), (long)s->blength, (long)s->remainder);
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}
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if (append_mode > 0) {
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s->flength = (OFF_T)s->count * s->blength;
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if (s->remainder)
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s->flength -= s->blength - s->remainder;
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return s;
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}
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if (s->count == 0)
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return(s);
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if (!(s->sums = new_array(struct sum_buf, s->count)))
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out_of_memory("receive_sums");
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for (i = 0; i < s->count; i++) {
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s->sums[i].sum1 = read_int(f);
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read_buf(f, s->sums[i].sum2, s->s2length);
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s->sums[i].offset = offset;
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s->sums[i].flags = 0;
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if (i == s->count-1 && s->remainder != 0)
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s->sums[i].len = s->remainder;
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else
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s->sums[i].len = s->blength;
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offset += s->sums[i].len;
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if (lull_mod && !(i % lull_mod))
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maybe_send_keepalive(time(NULL), True);
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if (DEBUG_GTE(DELTASUM, 3)) {
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rprintf(FINFO,
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"chunk[%d] len=%d offset=%s sum1=%08x\n",
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i, s->sums[i].len, big_num(s->sums[i].offset),
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s->sums[i].sum1);
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}
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}
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s->flength = offset;
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return s;
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}
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void successful_send(int ndx)
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{
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char fname[MAXPATHLEN];
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char *failed_op;
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struct file_struct *file;
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struct file_list *flist;
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STRUCT_STAT st;
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if (!remove_source_files)
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return;
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flist = flist_for_ndx(ndx, "successful_send");
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file = flist->files[ndx - flist->ndx_start];
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if (!change_pathname(file, NULL, 0))
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return;
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f_name(file, fname);
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if (do_lstat(fname, &st) < 0) {
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failed_op = "re-lstat";
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goto failed;
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}
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if (st.st_size != F_LENGTH(file) || st.st_mtime != file->modtime
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#ifdef ST_MTIME_NSEC
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|| (NSEC_BUMP(file) && (uint32)st.ST_MTIME_NSEC != F_MOD_NSEC(file))
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#endif
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) {
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rprintf(FERROR_XFER, "ERROR: Skipping sender remove for changed file: %s\n", fname);
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return;
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}
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if (do_unlink(fname) < 0) {
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failed_op = "remove";
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failed:
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if (errno == ENOENT)
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rprintf(FINFO, "sender file already removed: %s\n", fname);
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else
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rsyserr(FERROR_XFER, errno, "sender failed to %s %s", failed_op, fname);
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} else {
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if (INFO_GTE(REMOVE, 1))
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rprintf(FINFO, "sender removed %s\n", fname);
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}
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}
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static void write_ndx_and_attrs(int f_out, int ndx, int iflags,
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const char *fname, struct file_struct *file,
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uchar fnamecmp_type, char *buf, int len)
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{
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write_ndx(f_out, ndx);
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if (protocol_version < 29)
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return;
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write_shortint(f_out, iflags);
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if (iflags & ITEM_BASIS_TYPE_FOLLOWS)
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write_byte(f_out, fnamecmp_type);
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if (iflags & ITEM_XNAME_FOLLOWS)
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write_vstring(f_out, buf, len);
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#ifdef SUPPORT_XATTRS
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if (preserve_xattrs && iflags & ITEM_REPORT_XATTR && do_xfers
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&& !(want_xattr_optim && BITS_SET(iflags, ITEM_XNAME_FOLLOWS|ITEM_LOCAL_CHANGE)))
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send_xattr_request(fname, file, f_out);
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#endif
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}
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void send_files(int f_in, int f_out)
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{
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int fd = -1;
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struct sum_struct *s;
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struct map_struct *mbuf = NULL;
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STRUCT_STAT st;
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char fname[MAXPATHLEN], xname[MAXPATHLEN];
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const char *path, *slash;
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uchar fnamecmp_type;
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int iflags, xlen;
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struct file_struct *file;
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int phase = 0, max_phase = protocol_version >= 29 ? 2 : 1;
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int itemizing = am_server ? logfile_format_has_i : stdout_format_has_i;
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enum logcode log_code = log_before_transfer ? FLOG : FINFO;
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int f_xfer = write_batch < 0 ? batch_fd : f_out;
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int save_io_error = io_error;
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int ndx, j;
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if (DEBUG_GTE(SEND, 1))
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rprintf(FINFO, "send_files starting\n");
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while (1) {
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if (inc_recurse) {
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send_extra_file_list(f_out, MIN_FILECNT_LOOKAHEAD);
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extra_flist_sending_enabled = !flist_eof;
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}
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/* This call also sets cur_flist. */
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ndx = read_ndx_and_attrs(f_in, f_out, &iflags, &fnamecmp_type,
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xname, &xlen);
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extra_flist_sending_enabled = False;
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if (ndx == NDX_DONE) {
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if (!am_server && INFO_GTE(PROGRESS, 2) && cur_flist) {
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set_current_file_index(NULL, 0);
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end_progress(0);
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}
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if (inc_recurse && first_flist) {
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file_old_total -= first_flist->used;
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flist_free(first_flist);
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if (first_flist) {
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if (first_flist == cur_flist)
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file_old_total = cur_flist->used;
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write_ndx(f_out, NDX_DONE);
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continue;
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}
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}
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if (++phase > max_phase)
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break;
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if (DEBUG_GTE(SEND, 1))
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rprintf(FINFO, "send_files phase=%d\n", phase);
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write_ndx(f_out, NDX_DONE);
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continue;
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}
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if (inc_recurse)
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send_extra_file_list(f_out, MIN_FILECNT_LOOKAHEAD);
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if (ndx - cur_flist->ndx_start >= 0)
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file = cur_flist->files[ndx - cur_flist->ndx_start];
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else
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file = dir_flist->files[cur_flist->parent_ndx];
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if (F_PATHNAME(file)) {
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path = F_PATHNAME(file);
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slash = "/";
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} else {
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path = slash = "";
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}
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if (!change_pathname(file, NULL, 0))
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continue;
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f_name(file, fname);
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if (DEBUG_GTE(SEND, 1))
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rprintf(FINFO, "send_files(%d, %s%s%s)\n", ndx, path,slash,fname);
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#ifdef SUPPORT_XATTRS
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if (preserve_xattrs && iflags & ITEM_REPORT_XATTR && do_xfers
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&& !(want_xattr_optim && BITS_SET(iflags, ITEM_XNAME_FOLLOWS|ITEM_LOCAL_CHANGE)))
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recv_xattr_request(file, f_in);
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#endif
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if (!(iflags & ITEM_TRANSFER)) {
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maybe_log_item(file, iflags, itemizing, xname);
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write_ndx_and_attrs(f_out, ndx, iflags, fname, file,
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fnamecmp_type, xname, xlen);
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if (iflags & ITEM_IS_NEW) {
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stats.created_files++;
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if (S_ISREG(file->mode)) {
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/* Nothing further to count. */
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} else if (S_ISDIR(file->mode))
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stats.created_dirs++;
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#ifdef SUPPORT_LINKS
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else if (S_ISLNK(file->mode))
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stats.created_symlinks++;
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#endif
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else if (IS_DEVICE(file->mode))
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stats.created_devices++;
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else
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stats.created_specials++;
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}
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continue;
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}
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if (phase == 2) {
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rprintf(FERROR,
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"got transfer request in phase 2 [%s]\n",
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who_am_i());
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exit_cleanup(RERR_PROTOCOL);
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}
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if (file->flags & FLAG_FILE_SENT) {
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if (csum_length == SHORT_SUM_LENGTH) {
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/* For inplace: redo phase turns off the backup
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* flag so that we do a regular inplace send. */
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make_backups = -make_backups;
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append_mode = -append_mode;
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csum_length = SUM_LENGTH;
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}
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} else {
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if (csum_length != SHORT_SUM_LENGTH) {
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make_backups = -make_backups;
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append_mode = -append_mode;
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csum_length = SHORT_SUM_LENGTH;
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}
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if (iflags & ITEM_IS_NEW)
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stats.created_files++;
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}
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updating_basis_file = inplace && (protocol_version >= 29
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? fnamecmp_type == FNAMECMP_FNAME : make_backups <= 0);
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if (!am_server && INFO_GTE(PROGRESS, 1))
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set_current_file_index(file, ndx);
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stats.xferred_files++;
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stats.total_transferred_size += F_LENGTH(file);
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if (!log_before_transfer)
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remember_initial_stats();
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if (!do_xfers) { /* log the transfer */
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log_item(FCLIENT, file, iflags, NULL);
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write_ndx_and_attrs(f_out, ndx, iflags, fname, file,
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fnamecmp_type, xname, xlen);
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continue;
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}
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if (!(s = receive_sums(f_in))) {
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io_error |= IOERR_GENERAL;
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rprintf(FERROR_XFER, "receive_sums failed\n");
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exit_cleanup(RERR_PROTOCOL);
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}
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fd = do_open(fname, O_RDONLY, 0);
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if (fd == -1) {
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if (errno == ENOENT) {
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enum logcode c = am_daemon
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&& protocol_version < 28 ? FERROR
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: FWARNING;
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io_error |= IOERR_VANISHED;
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rprintf(c, "file has vanished: %s\n",
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full_fname(fname));
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} else {
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io_error |= IOERR_GENERAL;
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rsyserr(FERROR_XFER, errno,
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"send_files failed to open %s",
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full_fname(fname));
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}
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free_sums(s);
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if (protocol_version >= 30)
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send_msg_int(MSG_NO_SEND, ndx);
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continue;
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}
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/* map the local file */
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if (do_fstat(fd, &st) != 0) {
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io_error |= IOERR_GENERAL;
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rsyserr(FERROR_XFER, errno, "fstat failed");
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free_sums(s);
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close(fd);
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exit_cleanup(RERR_FILEIO);
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}
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if (st.st_size) {
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int32 read_size = MAX(s->blength * 3, MAX_MAP_SIZE);
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mbuf = map_file(fd, st.st_size, read_size, s->blength);
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} else
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mbuf = NULL;
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if (DEBUG_GTE(DELTASUM, 2)) {
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rprintf(FINFO, "send_files mapped %s%s%s of size %s\n",
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path,slash,fname, big_num(st.st_size));
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}
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write_ndx_and_attrs(f_out, ndx, iflags, fname, file,
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fnamecmp_type, xname, xlen);
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write_sum_head(f_xfer, s);
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if (DEBUG_GTE(DELTASUM, 2))
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rprintf(FINFO, "calling match_sums %s%s%s\n", path,slash,fname);
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if (log_before_transfer)
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log_item(FCLIENT, file, iflags, NULL);
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else if (!am_server && INFO_GTE(NAME, 1) && INFO_EQ(PROGRESS, 1))
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rprintf(FCLIENT, "%s\n", fname);
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set_compression(fname);
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match_sums(f_xfer, s, mbuf, st.st_size);
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if (INFO_GTE(PROGRESS, 1))
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end_progress(st.st_size);
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log_item(log_code, file, iflags, NULL);
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if (mbuf) {
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j = unmap_file(mbuf);
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if (j) {
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io_error |= IOERR_GENERAL;
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rsyserr(FERROR_XFER, j,
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"read errors mapping %s",
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full_fname(fname));
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}
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}
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close(fd);
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free_sums(s);
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if (DEBUG_GTE(SEND, 1))
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rprintf(FINFO, "sender finished %s%s%s\n", path,slash,fname);
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/* Flag that we actually sent this entry. */
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file->flags |= FLAG_FILE_SENT;
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}
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if (make_backups < 0)
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make_backups = -make_backups;
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if (io_error != save_io_error && protocol_version >= 30)
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send_msg_int(MSG_IO_ERROR, io_error);
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if (DEBUG_GTE(SEND, 1))
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rprintf(FINFO, "send files finished\n");
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match_report();
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write_ndx(f_out, NDX_DONE);
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}
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