/*
* util_pool_open_nocheck -- open a memory pool (set or a single file)
*
* This function opens opens a pool set without checking the header values.
*/
int
util_pool_open_nocheck(struct pool_set **setp, const char *path, int rdonly,
size_t hdrsize)
{
LOG(3, "setp %p path %s", setp, path);
int flags = rdonly ? MAP_PRIVATE|MAP_NORESERVE : MAP_SHARED;
int ret = util_poolset_open(setp, path, 0);
if (ret < 0) {
LOG(2, "cannot open pool set");
return -1;
}
struct pool_set *set = *setp;
ASSERT(set->nreplicas > 0);
set->rdonly = 0;
set->poolsize = SIZE_MAX;
for (unsigned r = 0; r < set->nreplicas; r++) {
if (util_replica_open(set, r, flags, hdrsize) != 0) {
LOG(2, "replica open failed");
goto err;
}
}
/* unmap all headers */
for (unsigned r = 0; r < set->nreplicas; r++) {
struct pool_replica *rep = set->replica[r];
for (unsigned p = 0; p < rep->nparts; p++)
util_unmap_hdr(&rep->part[p]);
}
return 0;
err:
LOG(4, "error clean up");
int oerrno = errno;
for (unsigned r = 0; r < set->nreplicas; r++)
util_replica_close(set, r);
util_poolset_close(set, 0);
errno = oerrno;
return -1;
}
/*
* sync_replica -- synchronize data across replicas within a poolset
*/
int
sync_replica(struct pool_set *set, unsigned flags)
{
ASSERTne(set, NULL);
/* examine poolset's health */
struct poolset_health_status *set_hs = NULL;
if (replica_check_poolset_health(set, &set_hs, flags)) {
ERR("poolset health check failed");
return -1;
}
/* check if poolset is broken; if not, nothing to do */
if (replica_is_poolset_healthy(set_hs)) {
LOG(1, "Poolset is healthy");
goto OK_close;
}
/* find one good replica; it will be the source of data */
unsigned healthy_replica = replica_find_healthy_replica(set_hs);
if (healthy_replica == UNDEF_REPLICA) {
ERR("no healthy replica found");
goto err;
}
/* in dry-run mode we can stop here */
if (is_dry_run(flags)) {
LOG(1, "Sync in dry-run mode finished successfully");
goto OK_close;
}
/* recreate broken parts */
if (recreate_broken_parts(set, set_hs, flags)) {
ERR("recreating broken parts failed");
goto err;
}
/* open all part files */
if (replica_open_poolset_part_files(set)) {
ERR("opening poolset part files failed");
goto err;
}
/* map all replicas */
if (util_poolset_open(set)) {
ERR("opening poolset failed");
goto err;
}
/* this is required for opening remote pools */
set->poolsize = set_hs->replica[healthy_replica]->pool_size;
/* open all remote replicas */
if (open_remote_replicas(set, set_hs)) {
ERR("opening remote replicas failed");
goto err;
}
/* update uuid fields in the set structure with part headers */
if (fill_struct_uuids(set, healthy_replica, set_hs, flags)) {
ERR("gathering uuids failed");
goto err;
}
/* create headers for broken parts */
if (!is_dry_run(flags)) {
if (create_headers_for_broken_parts(set, healthy_replica,
set_hs)) {
ERR("creating headers for broken parts failed");
goto err;
}
}
if (is_dry_run(flags))
goto OK_close;
/* update uuids of replicas and parts */
update_uuids(set, set_hs);
/* create all remote replicas */
if (create_remote_replicas(set, set_hs)) {
ERR("creating remote replicas failed");
goto err;
}
/* check and copy data if possible */
if (copy_data_to_broken_parts(set, healthy_replica,
flags, set_hs)) {
ERR("copying data to broken parts failed");
goto err;
}
/* grant permissions to all created parts */
if (grant_broken_parts_perm(set, healthy_replica, set_hs)) {
ERR("granting permissions to broken parts failed");
goto err;
}
OK_close:
replica_free_poolset_health_status(set_hs);
return 0;
err:
replica_free_poolset_health_status(set_hs);
return -1;
}
/*
* util_pool_open -- open a memory pool (set or a single file)
*
* This routine does all the work, but takes a rdonly flag so internal
* calls can map a read-only pool if required.
*/
int
util_pool_open(struct pool_set **setp, const char *path, int rdonly,
size_t minsize, size_t hdrsize, const char *sig,
uint32_t major, uint32_t compat, uint32_t incompat, uint32_t ro_compat)
{
LOG(3, "setp %p path %s rdonly %d minsize %zu "
"hdrsize %zu sig %s major %u "
"compat %#x incompat %#x ro_comapt %#x",
setp, path, rdonly, minsize, hdrsize,
sig, major, compat, incompat, ro_compat);
int flags = rdonly ? MAP_PRIVATE|MAP_NORESERVE : MAP_SHARED;
int ret = util_poolset_open(setp, path, minsize);
if (ret < 0) {
LOG(2, "cannot open pool set");
return -1;
}
struct pool_set *set = *setp;
ASSERT(set->nreplicas > 0);
set->rdonly = 0;
set->poolsize = SIZE_MAX;
for (unsigned r = 0; r < set->nreplicas; r++) {
if (util_replica_open(set, r, flags, hdrsize) != 0) {
LOG(2, "replica open failed");
goto err;
}
}
/* check headers, check UUID's, check replicas linkage */
for (unsigned r = 0; r < set->nreplicas; r++) {
struct pool_replica *rep = set->replica[r];
for (unsigned p = 0; p < rep->nparts; p++) {
if (util_header_check(set, r, p, sig, major,
compat, incompat, ro_compat) != 0) {
LOG(2, "header check failed - part #%d", p);
goto err;
}
set->rdonly |= rep->part[p].rdonly;
}
if (memcmp(HDR(REP(set, r - 1), 0)->uuid,
HDR(REP(set, r), 0)->prev_repl_uuid,
POOL_HDR_UUID_LEN) ||
memcmp(HDR(REP(set, r + 1), 0)->uuid,
HDR(REP(set, r), 0)->next_repl_uuid,
POOL_HDR_UUID_LEN)) {
ERR("wrong replica UUID");
errno = EINVAL;
goto err;
}
}
/* unmap all headers */
for (unsigned r = 0; r < set->nreplicas; r++) {
struct pool_replica *rep = set->replica[r];
for (unsigned p = 0; p < rep->nparts; p++)
util_unmap_hdr(&rep->part[p]);
}
return 0;
err:
LOG(4, "error clean up");
int oerrno = errno;
for (unsigned r = 0; r < set->nreplicas; r++)
util_replica_close(set, r);
util_poolset_close(set, 0);
errno = oerrno;
return -1;
}
/*
* util_pool_open_remote -- open a remote pool set file
*
* This routine does all the work, but takes a rdonly flag so internal
* calls can map a read-only pool if required.
*/
int
util_pool_open_remote(struct pool_set **setp, const char *path, int rdonly,
size_t minsize, char *sig, uint32_t *major,
uint32_t *compat, uint32_t *incompat, uint32_t *ro_compat,
unsigned char *poolset_uuid, unsigned char *first_part_uuid,
unsigned char *prev_repl_uuid, unsigned char *next_repl_uuid,
unsigned char *arch_flags)
{
LOG(3, "setp %p path %s rdonly %d minsize %zu "
"sig %p major %p compat %p incompat %p ro_comapt %p"
"poolset_uuid %p first_part_uuid %p"
"prev_repl_uuid %p next_repl_uuid %p arch_flags %p",
setp, path, rdonly, minsize,
sig, major, compat, incompat, ro_compat,
poolset_uuid, first_part_uuid, prev_repl_uuid, next_repl_uuid,
arch_flags);
int flags = rdonly ? MAP_PRIVATE|MAP_NORESERVE : MAP_SHARED;
int ret = util_poolset_open(setp, path, minsize);
if (ret < 0) {
LOG(2, "cannot open pool set");
return -1;
}
struct pool_set *set = *setp;
if (set->nreplicas > 1) {
LOG(2, "remote pool set cannot have replicas");
goto err;
}
if (util_replica_open(set, 0, flags) != 0) {
LOG(2, "replica open failed");
goto err;
}
struct pool_replica *rep = set->replica[0];
struct pool_hdr *hdr = rep->part[0].hdr;
set->rdonly |= rep->part[0].rdonly;
/* check headers, check UUID's, check replicas linkage */
for (unsigned p = 0; p < rep->nparts; p++) {
if (util_header_check_remote(rep, p) != 0) {
LOG(2, "header check failed - part #%d", p);
goto err;
}
set->rdonly |= rep->part[p].rdonly;
}
memcpy(sig, hdr->signature, POOL_HDR_SIG_LEN);
*major = hdr->major;
*compat = hdr->compat_features;
*incompat = hdr->incompat_features;
*ro_compat = hdr->ro_compat_features;
memcpy(poolset_uuid, hdr->poolset_uuid, POOL_HDR_UUID_LEN);
memcpy(first_part_uuid, hdr->uuid, POOL_HDR_UUID_LEN);
memcpy(prev_repl_uuid, hdr->prev_repl_uuid, POOL_HDR_UUID_LEN);
memcpy(next_repl_uuid, hdr->next_repl_uuid, POOL_HDR_UUID_LEN);
memcpy(arch_flags, &hdr->arch_flags, sizeof(struct arch_flags));
/* unmap all headers */
for (unsigned p = 0; p < rep->nparts; p++)
util_unmap_hdr(&rep->part[p]);
return 0;
err:
LOG(4, "error clean up");
int oerrno = errno;
util_replica_close(set, 0);
util_poolset_close(set, 0);
errno = oerrno;
return -1;
}
/*
* sync_replica -- synchronize data across replicas within a poolset
*/
int
replica_sync(struct pool_set *set, struct poolset_health_status *s_hs,
unsigned flags)
{
LOG(3, "set %p, flags %u", set, flags);
int ret = 0;
struct poolset_health_status *set_hs = NULL;
/* check if we already know the poolset health status */
if (s_hs == NULL) {
/* validate poolset before checking its health */
if (validate_args(set))
return -1;
/* examine poolset's health */
if (replica_check_poolset_health(set, &set_hs, flags)) {
ERR("poolset health check failed");
return -1;
}
/* check if poolset is broken; if not, nothing to do */
if (replica_is_poolset_healthy(set_hs)) {
LOG(1, "Poolset is healthy");
goto out;
}
} else {
set_hs = s_hs;
}
/* find one good replica; it will be the source of data */
unsigned healthy_replica = replica_find_healthy_replica(set_hs);
if (healthy_replica == UNDEF_REPLICA) {
ERR("no healthy replica found");
ret = -1;
goto out;
}
/* in dry-run mode we can stop here */
if (is_dry_run(flags)) {
LOG(1, "Sync in dry-run mode finished successfully");
goto out;
}
/* recreate broken parts */
if (recreate_broken_parts(set, set_hs, flags)) {
ERR("recreating broken parts failed");
ret = -1;
goto out;
}
/* open all part files */
if (replica_open_poolset_part_files(set)) {
ERR("opening poolset part files failed");
ret = -1;
goto out;
}
/* map all replicas */
if (util_poolset_open(set)) {
ERR("opening poolset failed");
ret = -1;
goto out;
}
/* this is required for opening remote pools */
set->poolsize = set_hs->replica[healthy_replica]->pool_size;
/* open all remote replicas */
if (open_remote_replicas(set, set_hs)) {
ERR("opening remote replicas failed");
ret = -1;
goto out;
}
/* update uuid fields in the set structure with part headers */
if (fill_struct_uuids(set, healthy_replica, set_hs, flags)) {
ERR("gathering uuids failed");
ret = -1;
goto out;
}
/* create headers for broken parts */
if (!is_dry_run(flags)) {
if (create_headers_for_broken_parts(set, healthy_replica,
set_hs)) {
ERR("creating headers for broken parts failed");
ret = -1;
goto out;
}
}
if (is_dry_run(flags))
goto out;
/* create all remote replicas */
if (create_remote_replicas(set, set_hs, flags)) {
ERR("creating remote replicas failed");
ret = -1;
goto out;
}
/* check and copy data if possible */
if (copy_data_to_broken_parts(set, healthy_replica,
flags, set_hs)) {
ERR("copying data to broken parts failed");
ret = -1;
goto out;
}
/* update uuids of replicas and parts */
if (update_uuids(set, set_hs)) {
ERR("updating uuids failed");
ret = -1;
goto out;
}
/* grant permissions to all created parts */
if (grant_created_parts_perm(set, healthy_replica, set_hs)) {
ERR("granting permissions to created parts failed");
ret = -1;
}
out:
if (s_hs == NULL)
replica_free_poolset_health_status(set_hs);
return ret;
}