/*
* remove_hdrs_replica -- (internal) remove headers from the replica
*/
static int
remove_hdrs_replica(struct pool_set *set_in, struct pool_set *set_out,
unsigned repn)
{
LOG(3, "set %p, repn %u", set_in, repn);
int ret = 0;
/* open all part files of the input replica */
if (replica_open_replica_part_files(set_in, repn)) {
LOG(1, "opening replica %u, part files failed", repn);
ret = -1;
goto out;
}
/* share part file descriptors between poolset structures */
copy_part_fds(set_out, set_in);
/* map the whole input replica */
if (util_replica_open(set_in, repn, MAP_SHARED)) {
LOG(1, "opening input replica failed: replica %u", repn);
ret = -1;
goto out_close;
}
/* map the whole output replica */
if (util_replica_open(set_out, repn, MAP_SHARED)) {
LOG(1, "opening output replica failed: replica %u", repn);
ret = -1;
goto out_unmap_in;
}
/* move data between the two mappings of the replica */
if (REP(set_in, repn)->nparts > 1)
copy_replica_data_fw(set_out, set_in, repn);
/* make changes to the first part's header */
update_replica_header(set_out, repn);
util_replica_close(set_out, repn);
out_unmap_in:
util_replica_close(set_in, repn);
out_close:
util_replica_fdclose(REP(set_in, repn));
out:
return ret;
}
/*
* replica_open_replica_part_files -- open all part files for a replica
*/
int
replica_open_replica_part_files(struct pool_set *set, unsigned repn)
{
struct pool_replica *rep = set->replica[repn];
for (unsigned p = 0; p < rep->nparts; ++p) {
/* skip already opened files */
if (rep->part[p].fd != -1)
continue;
if (util_part_open(&rep->part[p], 0, 0)) {
LOG(1, "part files open failed for replica %u, part %u",
repn, p);
errno = EINVAL;
goto err;
}
}
return 0;
err:
util_replica_fdclose(set->replica[repn]);
return -1;
}
/*
* add_hdrs_replica -- (internal) add lacking headers to the replica
*
* when the operation fails and returns -1, the replica remains untouched
*/
static int
add_hdrs_replica(struct pool_set *set_in, struct pool_set *set_out,
unsigned repn)
{
LOG(3, "set %p, repn %u", set_in, repn);
int ret = 0;
/* open all part files of the input replica */
if (replica_open_replica_part_files(set_in, repn)) {
LOG(1, "opening replica %u, part files failed", repn);
ret = -1;
goto out;
}
/* share part file descriptors between poolset structures */
copy_part_fds(set_out, set_in);
/* map the whole input replica */
if (util_replica_open(set_in, repn, MAP_SHARED)) {
LOG(1, "opening input replica failed: replica %u", repn);
ret = -1;
goto out_close;
}
/* map the whole output replica */
if (util_replica_open(set_out, repn, MAP_SHARED)) {
LOG(1, "opening output replica failed: replica %u", repn);
ret = -1;
goto out_unmap_in;
}
/* generate new uuids for lacking headers */
if (fill_replica_struct_uuids(set_out, repn)) {
LOG(1, "generating lacking uuids for parts failed: replica %u",
repn);
ret = -1;
goto out_unmap_out;
}
/* copy data between the two mappings of the replica */
if (REP(set_in, repn)->nparts > 1)
copy_replica_data_bw(set_out, set_in, repn);
/* create the missing headers */
if (create_missing_headers(set_out, repn)) {
LOG(1, "creating lacking headers failed: replica %u", repn);
/*
* copy the data back, so we could fall back to the original
* state
*/
if (REP(set_in, repn)->nparts > 1)
copy_replica_data_fw(set_in, set_out, repn);
ret = -1;
goto out_unmap_out;
}
/* make changes to the first part's header */
update_replica_header(set_out, repn);
/* store new uuids in all headers and update linkage in the replica */
update_uuids(set_out, repn);
out_unmap_out:
util_replica_close(set_out, repn);
out_unmap_in:
util_replica_close(set_in, repn);
out_close:
util_replica_fdclose(REP(set_in, repn));
out:
return ret;
}
