/* Need to make all the stuff that this does atomic so that existing backups
never get broken, even if somebody turns the power off on the server. */
static int atomic_data_jiggle(struct sdirs *sdirs, struct fdirs *fdirs,
int hardlinked_current, struct conf **cconfs)
{
int ret=-1;
char *datapth=NULL;
char *tmpman=NULL;
struct stat statp;
char *deltabdir=NULL;
char *deltafdir=NULL;
char *sigpath=NULL;
struct fzp *zp=NULL;
struct sbuf *sb=NULL;
struct fzp *delfp=NULL;
logp("Doing the atomic data jiggle...\n");
if(!(tmpman=get_tmp_filename(fdirs->manifest)))
goto error;
if(lstat(fdirs->manifest, &statp))
{
// Manifest does not exist - maybe the server was killed before
// it could be renamed.
logp("%s did not exist - trying %s\n", fdirs->manifest, tmpman);
// Rename race condition is of no consequence, because manifest
// already does not exist.
do_rename(tmpman, fdirs->manifest);
}
if(!(zp=fzp_gzopen(fdirs->manifest, "rb")))
goto error;
if(!(deltabdir=prepend_s(fdirs->currentdup, "deltas.reverse"))
|| !(deltafdir=prepend_s(sdirs->finishing, "deltas.forward"))
|| !(sigpath=prepend_s(fdirs->currentdup, "sig.tmp"))
|| !(sb=sbuf_alloc(PROTO_1)))
{
log_out_of_memory(__func__);
goto error;
}
mkdir(fdirs->datadir, 0777);
while(1)
{
switch(sbuf_fill_from_file(sb, zp, NULL, NULL))
{
case 0: break;
case 1: goto end;
default: goto error;
}
if(sb->protocol1->datapth.buf)
{
if(write_status(CNTR_STATUS_SHUFFLING,
sb->protocol1->datapth.buf, get_cntr(cconfs))
|| jiggle(sdirs, fdirs, sb, hardlinked_current,
deltabdir, deltafdir,
sigpath, &delfp, cconfs))
goto error;
}
sbuf_free_content(sb);
}
end:
if(fzp_close(&delfp))
{
logp("error closing %s in atomic_data_jiggle\n",
fdirs->deletionsfile);
goto error;
}
if(maybe_delete_files_from_manifest(tmpman, fdirs, cconfs))
goto error;
// Remove the temporary data directory, we have probably removed
// useful files from it.
recursive_delete_dirs_only(deltafdir);
ret=0;
error:
fzp_close(&zp);
fzp_close(&delfp);
sbuf_free(&sb);
free_w(&deltabdir);
free_w(&deltafdir);
free_w(&sigpath);
free_w(&datapth);
free_w(&tmpman);
return ret;
}
/* Need to make all the stuff that this does atomic so that existing backups
never get broken, even if somebody turns the power off on the server. */
static int atomic_data_jiggle(struct sdirs *sdirs, struct fdirs *fdirs,
int hardlinked_current, struct conf *cconf, unsigned long bno)
{
int ars=0;
int ret=-1;
char *datapth=NULL;
char *tmpman=NULL;
struct stat statp;
char *deltabdir=NULL;
char *deltafdir=NULL;
char *sigpath=NULL;
gzFile zp=NULL;
struct sbuf *sb=NULL;
FILE *delfp=NULL;
logp("Doing the atomic data jiggle...\n");
if(!(tmpman=get_tmp_filename(fdirs->manifest)))
goto end;
if(lstat(fdirs->manifest, &statp))
{
// Manifest does not exist - maybe the server was killed before
// it could be renamed.
logp("%s did not exist - trying %s\n", fdirs->manifest, tmpman);
// Rename race condition is of no consequence, because manifest
// already does not exist.
do_rename(tmpman, fdirs->manifest);
}
if(!(zp=gzopen_file(fdirs->manifest, "rb")))
goto end;
if(!(deltabdir=prepend_s(fdirs->currentdup, "deltas.reverse"))
|| !(deltafdir=prepend_s(sdirs->finishing, "deltas.forward"))
|| !(sigpath=prepend_s(fdirs->currentdup, "sig.tmp"))
|| !(sb=sbuf_alloc(cconf)))
{
log_out_of_memory(__func__);
goto end;
}
mkdir(fdirs->datadir, 0777);
while(!(ars=sbufl_fill(sb, NULL, NULL, zp, cconf->cntr)))
{
if(sb->burp1->datapth.buf)
{
if(write_status(STATUS_SHUFFLING,
sb->burp1->datapth.buf, cconf)) goto end;
if((ret=jiggle(sdirs, fdirs, sb, hardlinked_current,
deltabdir, deltafdir,
sigpath, &delfp, cconf))) goto end;
}
sbuf_free_content(sb);
}
if(ars<0) goto end;
if(close_fp(&delfp))
{
logp("error closing %s in atomic_data_jiggle\n",
fdirs->deletionsfile);
goto end;
}
if(maybe_delete_files_from_manifest(tmpman, fdirs, cconf))
goto end;
// Remove the temporary data directory, we have probably removed
// useful files from it.
sync(); // try to help CIFS
recursive_delete(deltafdir, NULL, 0 /* do not del files */);
end:
gzclose_fp(&zp);
close_fp(&delfp);
sbuf_free(&sb);
free_w(&deltabdir);
free_w(&deltafdir);
free_w(&sigpath);
free_w(&datapth);
free_w(&tmpman);
return ret;
}
/* Need to make all the stuff that this does atomic so that existing backups
never get broken, even if somebody turns the power off on the server. */
static int atomic_data_jiggle(const char *finishing, const char *working, const char *manifest, const char *current, const char *currentdata, const char *datadir, const char *datadirtmp, const char *deletionsfile, struct config *cconf, const char *client, int hardlinked, unsigned long bno, struct cntr *p1cntr, struct cntr *cntr)
{
int ret=0;
int ars=0;
char *datapth=NULL;
char *tmpman=NULL;
struct stat statp;
char *deltabdir=NULL;
char *deltafdir=NULL;
char *sigpath=NULL;
gzFile zp=NULL;
struct sbuf sb;
FILE *delfp=NULL;
logp("Doing the atomic data jiggle...\n");
if(!(tmpman=get_tmp_filename(manifest))) return -1;
if(lstat(manifest, &statp))
{
// Manifest does not exist - maybe the server was killed before
// it could be renamed.
logp("%s did not exist - trying %s\n", manifest, tmpman);
do_rename(tmpman, manifest);
}
free(tmpman);
if(!(zp=gzopen_file(manifest, "rb"))) return -1;
if(!(deltabdir=prepend_s(current,
"deltas.reverse", strlen("deltas.reverse")))
|| !(deltafdir=prepend_s(finishing,
"deltas.forward", strlen("deltas.forward")))
|| !(sigpath=prepend_s(current,
"sig.tmp", strlen("sig.tmp"))))
{
log_out_of_memory(__FUNCTION__);
gzclose_fp(&zp);
return -1;
}
mkdir(datadir, 0777);
init_sbuf(&sb);
while(!(ars=sbuf_fill(NULL, zp, &sb, cntr)))
{
if(sb.datapth)
{
write_status(client, STATUS_SHUFFLING,
sb.datapth, p1cntr, cntr);
if((ret=jiggle(sb.datapth, currentdata, datadirtmp,
datadir, deltabdir, deltafdir,
sigpath, sb.endfile, deletionsfile, &delfp,
&sb,
hardlinked, sb.compression, cntr, cconf)))
break;
}
free_sbuf(&sb);
}
if(!ret)
{
if(ars>0) ret=0;
else ret=-1;
}
if(close_fp(&delfp))
{
logp("error closing %s in atomic_data_jiggle\n", deletionsfile);
ret=-1;
}
gzclose_fp(&zp);
if(maybe_delete_files_from_manifest(manifest, deletionsfile,
cconf, cntr)) ret=-1;
// Remove the temporary data directory, we have probably removed
// useful files from it.
sync(); // try to help CIFS
recursive_delete(deltafdir, NULL, FALSE /* do not del files */);
if(deltabdir) free(deltabdir);
if(deltafdir) free(deltafdir);
if(sigpath) free(sigpath);
if(datapth) free(datapth);
return ret;
}
