int si_nodemap(sinode *n, sr *r)
{
int rc = ss_mmap(&n->map, n->file.fd, n->file.size, 1);
if (ssunlikely(rc == -1)) {
sr_malfunction(r->e, "db file '%s' mmap error: %s",
n->file.file, strerror(errno));
return -1;
}
return 0;
}
static inline sibranch*
si_branchcreate(si *index, sdc *c, sinode *parent, svindex *vindex, uint64_t vlsn)
{
sr *r = index->r;
svmerge vmerge;
sv_mergeinit(&vmerge);
int rc = sv_mergeprepare(&vmerge, r, 1);
if (ssunlikely(rc == -1))
return NULL;
svmergesrc *s = sv_mergeadd(&vmerge, NULL);
ss_iterinit(sv_indexiterraw, &s->src);
ss_iteropen(sv_indexiterraw, &s->src, vindex);
ssiter i;
ss_iterinit(sv_mergeiter, &i);
ss_iteropen(sv_mergeiter, &i, r, &vmerge, SS_GTE, 1);
/* merge iter is not used */
sdmergeconf mergeconf = {
.size_stream = UINT32_MAX,
.size_node = UINT64_MAX,
.size_page = index->scheme->node_page_size,
.checksum = index->scheme->node_page_checksum,
.compression = index->scheme->compression,
.compression_key = index->scheme->compression_key,
.offset = parent->file.size,
.vlsn = vlsn,
.save_delete = 1
};
sdmerge merge;
sd_mergeinit(&merge, r, &i, &c->build, &mergeconf);
rc = sd_merge(&merge);
if (ssunlikely(rc == -1)) {
sv_mergefree(&vmerge, r->a);
sr_oom_malfunction(r->e);
goto error;
}
assert(rc == 1);
sv_mergefree(&vmerge, r->a);
sibranch *branch = si_branchnew(r);
if (ssunlikely(branch == NULL))
goto error;
sdid id = {
.parent = parent->self.id.id,
.flags = SD_IDBRANCH,
.id = sr_seq(r->seq, SR_NSNNEXT)
};
rc = sd_mergecommit(&merge, &id);
if (ssunlikely(rc == -1))
goto error;
si_branchset(branch, &merge.index);
rc = sd_commit(&c->build, r, &branch->index, &parent->file);
if (ssunlikely(rc == -1)) {
si_branchfree(branch, r);
return NULL;
}
SS_INJECTION(r->i, SS_INJECTION_SI_BRANCH_0,
sr_malfunction(r->e, "%s", "error injection");
si_branchfree(branch, r);
return NULL);
if (index->scheme->sync) {
rc = si_nodesync(parent, r);
if (ssunlikely(rc == -1)) {
si_branchfree(branch, r);
return NULL;
}
}
if (index->scheme->mmap) {
ss_mmapinit(&parent->map_swap);
rc = ss_mmap(&parent->map_swap, parent->file.fd,
parent->file.size, 1);
if (ssunlikely(rc == -1)) {
sr_malfunction(r->e, "db file '%s' mmap error: %s",
parent->file.file, strerror(errno));
return NULL;
}
}
return branch;
error:
sd_mergefree(&merge);
return NULL;
}
int si_branch(si *index, sdc *c, siplan *plan, uint64_t vlsn)
{
sr *r = index->r;
sinode *n = plan->node;
assert(n->flags & SI_LOCK);
si_lock(index);
if (ssunlikely(n->used == 0)) {
si_nodeunlock(n);
si_unlock(index);
return 0;
}
svindex *i;
i = si_noderotate(n);
si_unlock(index);
sd_creset(c);
sibranch *branch = si_branchcreate(index, c, n, i, vlsn);
if (ssunlikely(branch == NULL))
return -1;
/* commit */
si_lock(index);
branch->next = n->branch;
n->branch = branch;
n->branch_count++;
uint32_t used = sv_indexused(i);
n->used -= used;
ss_quota(r->quota, SS_QREMOVE, used);
svindex swap = *i;
si_nodeunrotate(n);
si_nodeunlock(n);
si_plannerupdate(&index->p, SI_BRANCH|SI_COMPACT, n);
ssmmap swap_map = n->map;
n->map = n->map_swap;
memset(&n->map_swap, 0, sizeof(n->map_swap));
si_unlock(index);
/* gc */
if (index->scheme->mmap) {
int rc = ss_munmap(&swap_map);
if (ssunlikely(rc == -1)) {
sr_malfunction(r->e, "db file '%s' munmap error: %s",
n->file.file, strerror(errno));
return -1;
}
}
si_nodegc_index(r, &swap);
return 1;
}
static inline char*
si_noderead(si *index, ssbuf *dest, sinode *node)
{
sr *r = index->r;
if (index->scheme->mmap) {
return node->map.p;
}
int rc = ss_bufensure(dest, r->a, node->file.size);
if (ssunlikely(rc == -1)) {
sr_oom_malfunction(r->e);
return NULL;
}
rc = ss_filepread(&node->file, 0, dest->s, node->file.size);
if (ssunlikely(rc == -1)) {
sr_malfunction(r->e, "db file '%s' read error: %s",
node->file.file, strerror(errno));
return NULL;
}
ss_bufadvance(dest, node->file.size);
return dest->s;
}
static inline sibranch*
si_branchcreate(si *index, sdc *c, sinode *parent, svindex *vindex, uint64_t vlsn)
{
sr *r = index->r;
sibranch *branch = NULL;
/* in-memory mode blob */
int rc;
ssblob copy, *blob = NULL;
if (index->scheme->in_memory) {
ss_blobinit(©);
rc = ss_blobensure(©, 10ULL * 1024 * 1024);
if (ssunlikely(rc == -1)) {
sr_oom_malfunction(r->e);
return NULL;
}
blob = ©
}
svmerge vmerge;
sv_mergeinit(&vmerge);
rc = sv_mergeprepare(&vmerge, r, 1);
if (ssunlikely(rc == -1))
return NULL;
svmergesrc *s = sv_mergeadd(&vmerge, NULL);
ss_iterinit(sv_indexiter, &s->src);
ss_iteropen(sv_indexiter, &s->src, r, vindex, SS_GTE, NULL, 0);
ssiter i;
ss_iterinit(sv_mergeiter, &i);
ss_iteropen(sv_mergeiter, &i, r, &vmerge, SS_GTE);
/* merge iter is not used */
sdmergeconf mergeconf = {
.size_stream = UINT32_MAX,
.size_node = UINT64_MAX,
.size_page = index->scheme->node_page_size,
.checksum = index->scheme->node_page_checksum,
.compression = index->scheme->compression,
.compression_key = index->scheme->compression_key,
.vlsn = vlsn,
.save_delete = 1,
.save_update = 1
};
sdmerge merge;
sd_mergeinit(&merge, r, &i, &c->build, &c->update, &mergeconf);
while ((rc = sd_merge(&merge)) > 0)
{
/* write open seal */
uint64_t seal = parent->file.size;
rc = sd_writeseal(r, &parent->file, blob);
if (ssunlikely(rc == -1))
goto e0;
/* write pages */
uint64_t offset = parent->file.size;
while ((rc = sd_mergepage(&merge, offset)) == 1)
{
rc = sd_writepage(r, &parent->file, blob, merge.build);
if (ssunlikely(rc == -1))
goto e0;
offset = parent->file.size;
}
if (ssunlikely(rc == -1))
goto e0;
sdid id = {
.parent = parent->self.id.id,
.flags = SD_IDBRANCH,
.id = sr_seq(r->seq, SR_NSNNEXT)
};
rc = sd_mergecommit(&merge, &id, parent->file.size);
if (ssunlikely(rc == -1))
goto e0;
/* write index */
rc = sd_writeindex(r, &parent->file, blob, &merge.index);
if (ssunlikely(rc == -1))
goto e0;
if (index->scheme->sync) {
rc = ss_filesync(&parent->file);
if (ssunlikely(rc == -1)) {
sr_malfunction(r->e, "file '%s' sync error: %s",
parent->file.file, strerror(errno));
goto e0;
}
}
SS_INJECTION(r->i, SS_INJECTION_SI_BRANCH_0,
sd_mergefree(&merge);
sr_malfunction(r->e, "%s", "error injection");
return NULL);
/* seal the branch */
rc = sd_seal(r, &parent->file, blob, &merge.index, seal);
if (ssunlikely(rc == -1))
goto e0;
if (index->scheme->sync == 2) {
rc = ss_filesync(&parent->file);
if (ssunlikely(rc == -1)) {
sr_malfunction(r->e, "file '%s' sync error: %s",
parent->file.file, strerror(errno));
goto e0;
}
}
/* create new branch object */
branch = si_branchnew(r);
if (ssunlikely(branch == NULL))
goto e0;
si_branchset(branch, &merge.index);
}
sv_mergefree(&vmerge, r->a);
if (ssunlikely(rc == -1)) {
sr_oom_malfunction(r->e);
goto e0;
}
assert(branch != NULL);
/* in-memory mode support */
if (blob) {
rc = ss_blobfit(blob);
if (ssunlikely(rc == -1)) {
ss_blobfree(blob);
goto e1;
}
branch->copy = copy;
}
/* mmap support */
if (index->scheme->mmap) {
ss_mmapinit(&parent->map_swap);
rc = ss_mmap(&parent->map_swap, parent->file.fd,
parent->file.size, 1);
if (ssunlikely(rc == -1)) {
sr_malfunction(r->e, "db file '%s' mmap error: %s",
parent->file.file, strerror(errno));
goto e1;
}
}
return branch;
e0:
sd_mergefree(&merge);
if (blob)
ss_blobfree(blob);
return NULL;
e1:
si_branchfree(branch, r);
return NULL;
}
int si_branch(si *index, sdc *c, siplan *plan, uint64_t vlsn)
{
sr *r = index->r;
sinode *n = plan->node;
assert(n->flags & SI_LOCK);
si_lock(index);
if (ssunlikely(n->used == 0)) {
si_nodeunlock(n);
si_unlock(index);
return 0;
}
svindex *i;
i = si_noderotate(n);
si_unlock(index);
sd_creset(c, r);
sibranch *branch = si_branchcreate(index, c, n, i, vlsn);
if (ssunlikely(branch == NULL))
return -1;
/* commit */
si_lock(index);
branch->next = n->branch;
n->branch = branch;
n->branch_count++;
uint32_t used = sv_indexused(i);
n->used -= used;
ss_quota(r->quota, SS_QREMOVE, used);
svindex swap = *i;
si_nodeunrotate(n);
si_nodeunlock(n);
si_plannerupdate(&index->p, SI_BRANCH|SI_COMPACT, n);
ssmmap swap_map = n->map;
n->map = n->map_swap;
memset(&n->map_swap, 0, sizeof(n->map_swap));
si_unlock(index);
/* gc */
if (index->scheme->mmap) {
int rc = ss_munmap(&swap_map);
if (ssunlikely(rc == -1)) {
sr_malfunction(r->e, "db file '%s' munmap error: %s",
n->file.file, strerror(errno));
return -1;
}
}
si_nodegc_index(r, &swap);
return 1;
}
int si_compact(si *index, sdc *c, siplan *plan, uint64_t vlsn)
{
sr *r = index->r;
sinode *node = plan->node;
assert(node->flags & SI_LOCK);
sd_creset(c, r);
/* prepare for compaction */
int rc;
rc = sd_censure(c, r, node->branch_count);
if (ssunlikely(rc == -1))
return sr_oom_malfunction(r->e);
svmerge merge;
sv_mergeinit(&merge);
rc = sv_mergeprepare(&merge, r, node->branch_count);
if (ssunlikely(rc == -1))
return -1;
/* read node file into memory */
int use_mmap = index->scheme->mmap;
ssmmap *map = &node->map;
ssmmap preload;
if (index->scheme->node_compact_load) {
rc = si_noderead(node, r, &c->c);
if (ssunlikely(rc == -1))
return -1;
preload.p = c->c.s;
preload.size = ss_bufused(&c->c);
map = &preload;
use_mmap = 1;
}
uint32_t size_stream = 0;
sdcbuf *cbuf = c->head;
sibranch *b = node->branch;
while (b) {
svmergesrc *s = sv_mergeadd(&merge, NULL);
sdreadarg arg = {
.index = &b->index,
.buf = &cbuf->a,
.buf_xf = &cbuf->b,
.buf_read = &c->d,
.index_iter = &cbuf->index_iter,
.page_iter = &cbuf->page_iter,
.use_compression = index->scheme->compression,
.use_memory = index->scheme->in_memory,
.use_mmap = use_mmap,
.use_mmap_copy = 0,
.o = SS_GTE,
.memory = &b->copy,
.mmap = map,
.file = &node->file,
.r = r
};
ss_iterinit(sd_read, &s->src);
int rc = ss_iteropen(sd_read, &s->src, &arg, NULL, 0);
if (ssunlikely(rc == -1))
return sr_oom_malfunction(r->e);
size_stream += sd_indextotal(&b->index);
cbuf = cbuf->next;
b = b->next;
}
ssiter i;
ss_iterinit(sv_mergeiter, &i);
ss_iteropen(sv_mergeiter, &i, r, &merge, SS_GTE);
rc = si_compaction(index, c, vlsn, node, &i, size_stream);
sv_mergefree(&merge, r->a);
return rc;
}
