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mdbx: fix/refine mdbx_setup_dxb() for case open existing DB with new geo-params.

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Change-Id: Iebb9b19c8f81d8629c4b28ed547d27f1a139dc7f
This commit is contained in:
Leonid Yuriev
2019-10-29 08:23:48 +03:00
parent 3cc8e5222c
commit e7b3a15d54
1 changed files with 38 additions and 45 deletions
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83
src/elements/core.c
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@@ -7792,10 +7792,10 @@ int __cold mdbx_env_get_maxreaders(MDBX_env *env, unsigned *readers) {
/* Further setup required for opening an MDBX environment */
static int __cold mdbx_setup_dxb(MDBX_env *env, const int lck_rc) {
uint64_t filesize_before_mmap;
uint64_t filesize_before;
MDBX_meta meta;
int rc = MDBX_RESULT_FALSE;
int err = mdbx_read_header(env, &meta, &filesize_before_mmap);
int err = mdbx_read_header(env, &meta, &filesize_before);
if (unlikely(err != MDBX_SUCCESS)) {
if (lck_rc != /* lck exclusive */ MDBX_RESULT_TRUE || err != MDBX_ENODATA ||
(env->me_flags & MDBX_RDONLY) != 0)
@@ -7821,12 +7821,12 @@ static int __cold mdbx_setup_dxb(MDBX_env *env, const int lck_rc) {
if (unlikely(err != MDBX_SUCCESS))
return err;
err = mdbx_ftruncate(env->me_fd, filesize_before_mmap = env->me_dbgeo.now);
err = mdbx_ftruncate(env->me_fd, filesize_before = env->me_dbgeo.now);
if (unlikely(err != MDBX_SUCCESS))
return err;
#ifndef NDEBUG /* just for checking */
err = mdbx_read_header(env, &meta, &filesize_before_mmap);
err = mdbx_read_header(env, &meta, &filesize_before);
if (unlikely(err != MDBX_SUCCESS))
return err;
#endif
@@ -7842,38 +7842,39 @@ static int __cold mdbx_setup_dxb(MDBX_env *env, const int lck_rc) {
mdbx_setup_pagesize(env, meta.mm_psize);
const size_t used_bytes = pgno2bytes(env, meta.mm_geo.next);
const size_t used_aligned2os_bytes =
roundup_powerof2(used_bytes, env->me_os_psize);
if ((env->me_flags & MDBX_RDONLY) /* readonly */
|| lck_rc != MDBX_RESULT_TRUE /* not exclusive */) {
/* use present params from db */
const size_t pagesize = meta.mm_psize;
err = mdbx_env_set_geometry(
env, meta.mm_geo.lower * (uint64_t)meta.mm_psize,
meta.mm_geo.now * (uint64_t)meta.mm_psize,
meta.mm_geo.upper * (uint64_t)meta.mm_psize,
meta.mm_geo.grow * (uint64_t)meta.mm_psize,
meta.mm_geo.shrink * (uint64_t)meta.mm_psize, meta.mm_psize);
env, meta.mm_geo.lower * pagesize, meta.mm_geo.now * pagesize,
meta.mm_geo.upper * pagesize, meta.mm_geo.grow * pagesize,
meta.mm_geo.shrink * pagesize, meta.mm_psize);
if (unlikely(err != MDBX_SUCCESS)) {
mdbx_error("%s", "could not use present dbsize-params from db");
return MDBX_INCOMPATIBLE;
}
} else if (env->me_dbgeo.now) {
/* silently growth to last used page */
if (env->me_dbgeo.now < used_bytes)
env->me_dbgeo.now = used_bytes;
if (env->me_dbgeo.upper < used_bytes)
env->me_dbgeo.upper = used_bytes;
if (env->me_dbgeo.now < used_aligned2os_bytes)
env->me_dbgeo.now = used_aligned2os_bytes;
if (env->me_dbgeo.upper < used_aligned2os_bytes)
env->me_dbgeo.upper = used_aligned2os_bytes;
/* apply preconfigured params, but only if substantial changes:
* - upper or lower limit changes
* - shrink threshold or growth step
* But ignore change just a 'now/current' size. */
if (bytes_align2os_bytes(env, env->me_dbgeo.upper) !=
pgno_align2os_bytes(env, meta.mm_geo.upper) ||
pgno2bytes(env, meta.mm_geo.upper) ||
bytes_align2os_bytes(env, env->me_dbgeo.lower) !=
pgno_align2os_bytes(env, meta.mm_geo.lower) ||
pgno2bytes(env, meta.mm_geo.lower) ||
bytes_align2os_bytes(env, env->me_dbgeo.shrink) !=
pgno_align2os_bytes(env, meta.mm_geo.shrink) ||
pgno2bytes(env, meta.mm_geo.shrink) ||
bytes_align2os_bytes(env, env->me_dbgeo.grow) !=
pgno_align2os_bytes(env, meta.mm_geo.grow)) {
pgno2bytes(env, meta.mm_geo.grow)) {
if (env->me_dbgeo.shrink && env->me_dbgeo.now > used_bytes)
/* pre-shrink if enabled */
@@ -7902,11 +7903,15 @@ static int __cold mdbx_setup_dxb(MDBX_env *env, const int lck_rc) {
meta.mm_geo.lower, meta.mm_geo.next, meta.mm_geo.now,
meta.mm_geo.upper, meta.mm_geo.grow, meta.mm_geo.shrink,
meta.mm_txnid_a.inconsistent, mdbx_durable_str(&meta));
} else {
/* fetch back 'now/current' size, since it was ignored during comparison
* and may differ. */
env->me_dbgeo.now = pgno_align2os_bytes(env, meta.mm_geo.now);
}
mdbx_ensure(env, meta.mm_geo.now >= meta.mm_geo.next);
} else {
/* geo-params not pre-configured by user,
* get current values from a meta. */
/* geo-params are not pre-configured by user,
* get current values from the meta. */
env->me_dbgeo.now = pgno2bytes(env, meta.mm_geo.now);
env->me_dbgeo.lower = pgno2bytes(env, meta.mm_geo.lower);
env->me_dbgeo.upper = pgno2bytes(env, meta.mm_geo.upper);
@@ -7914,48 +7919,38 @@ static int __cold mdbx_setup_dxb(MDBX_env *env, const int lck_rc) {
env->me_dbgeo.shrink = pgno2bytes(env, meta.mm_geo.shrink);
}
const size_t expected_bytes = pgno_align2os_bytes(env, meta.mm_geo.now);
mdbx_ensure(env, expected_bytes >= used_bytes);
if (filesize_before_mmap != expected_bytes) {
mdbx_ensure(env,
pgno_align2os_bytes(env, meta.mm_geo.now) == env->me_dbgeo.now);
mdbx_ensure(env, env->me_dbgeo.now >= used_bytes);
if (unlikely(filesize_before != env->me_dbgeo.now)) {
if (lck_rc != /* lck exclusive */ MDBX_RESULT_TRUE) {
mdbx_verbose("filesize mismatch (expect %" PRIuPTR "b/%" PRIaPGNO
"p, have %" PRIu64 "b/%" PRIaPGNO "p), "
"assume other process working",
expected_bytes, bytes2pgno(env, expected_bytes),
filesize_before_mmap,
bytes2pgno(env, (size_t)filesize_before_mmap));
env->me_dbgeo.now, bytes2pgno(env, env->me_dbgeo.now),
filesize_before, bytes2pgno(env, (size_t)filesize_before));
} else {
mdbx_notice("filesize mismatch (expect %" PRIuSIZE "b/%" PRIaPGNO
"p, have %" PRIu64 "b/%" PRIaPGNO "p)",
expected_bytes, bytes2pgno(env, expected_bytes),
filesize_before_mmap,
bytes2pgno(env, (size_t)filesize_before_mmap));
if (filesize_before_mmap < used_bytes) {
env->me_dbgeo.now, bytes2pgno(env, env->me_dbgeo.now),
filesize_before, bytes2pgno(env, (size_t)filesize_before));
if (filesize_before < used_bytes) {
mdbx_error("last-page beyond end-of-file (last %" PRIaPGNO
", have %" PRIaPGNO ")",
meta.mm_geo.next,
bytes2pgno(env, (size_t)filesize_before_mmap));
meta.mm_geo.next, bytes2pgno(env, (size_t)filesize_before));
return MDBX_CORRUPTED;
}
if (env->me_flags & MDBX_RDONLY) {
if (filesize_before_mmap % env->me_os_psize) {
if (filesize_before & (env->me_os_psize - 1)) {
mdbx_error("%s", "filesize should be rounded-up to system page");
return MDBX_WANNA_RECOVERY;
}
mdbx_warning("%s", "ignore filesize mismatch in readonly-mode");
} else {
mdbx_verbose("resize datafile to %" PRIuSIZE " bytes, %" PRIaPGNO
mdbx_verbose("will resize datafile to %" PRIuSIZE " bytes, %" PRIaPGNO
" pages",
expected_bytes, bytes2pgno(env, expected_bytes));
err = mdbx_ftruncate(env->me_fd, expected_bytes);
if (unlikely(err != MDBX_SUCCESS)) {
mdbx_error("error %d, while resize datafile to %" PRIuSIZE
" bytes, %" PRIaPGNO " pages",
rc, expected_bytes, bytes2pgno(env, expected_bytes));
return err;
}
filesize_before_mmap = expected_bytes;
env->me_dbgeo.now, bytes2pgno(env, env->me_dbgeo.now));
}
}
}
@@ -7973,8 +7968,6 @@ static int __cold mdbx_setup_dxb(MDBX_env *env, const int lck_rc) {
: MADV_DONTDUMP);
#endif
const size_t used_aligned2os_bytes =
roundup_powerof2(used_bytes, env->me_os_psize);
*env->me_discarded_tail = bytes2pgno(env, used_aligned2os_bytes);
if (used_aligned2os_bytes < env->me_dxb_mmap.current) {
#if defined(MADV_REMOVE)
@@ -8124,7 +8117,7 @@ static int __cold mdbx_setup_dxb(MDBX_env *env, const int lck_rc) {
env->me_dxb_mmap.current);
return MDBX_PROBLEM;
}
if (env->me_dxb_mmap.current != expected_bytes &&
if (env->me_dxb_mmap.current != env->me_dbgeo.now &&
(env->me_flags & MDBX_RDONLY) == 0) {
meta.mm_geo.now = bytes2pgno(env, env->me_dxb_mmap.current);
mdbx_verbose("update meta-geo to filesize %" PRIuPTR " bytes, %" PRIaPGNO