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mdbx: переработка проверка размера файла БД при открытии.

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Переработка 05cdf9d202b14ac09c801c7893e65271fa27f378. У предыдущего
варианта был недостаток, при необходимости выдачи предупреждения
и открытии БД с изменением геометрии, предупреждение не выдавалось,
что может затруднять анализ/разбор проблемных ситуаций.
This commit is contained in:
Леонид Юрьев (Leonid Yuriev) 2025-02-20 22:21:47 +03:00
parent 26cd5ebc43
commit 54d8c0d290
1 changed files with 14 additions and 16 deletions
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30
src/dxb.c
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@ -567,7 +567,7 @@ __cold int dxb_setup(MDBX_env *env, const int lck_rc, const mdbx_mode_t mode_bit
return err;
}
bool new_size_from_user = false;
size_t expected_filesize = 0;
const size_t used_bytes = pgno2bytes(env, header.geometry.first_unallocated);
const size_t used_aligned2os_bytes = ceil_powerof2(used_bytes, globals.sys_pagesize);
if ((env->flags & MDBX_RDONLY) /* readonly */
@ -612,28 +612,25 @@ __cold int dxb_setup(MDBX_env *env, const int lck_rc, const mdbx_mode_t mode_bit
}
/* altering fields to match geometry given from user */
new_size_from_user = header.geometry.now != bytes2pgno(env, env->geo_in_bytes.now);
if (new_size_from_user)
header.geometry.now = bytes2pgno(env, env->geo_in_bytes.now);
expected_filesize = pgno_align2os_bytes(env, header.geometry.now);
header.geometry.now = bytes2pgno(env, env->geo_in_bytes.now);
header.geometry.lower = bytes2pgno(env, env->geo_in_bytes.lower);
header.geometry.upper = bytes2pgno(env, env->geo_in_bytes.upper);
header.geometry.grow_pv = pages2pv(bytes2pgno(env, env->geo_in_bytes.grow));
header.geometry.shrink_pv = pages2pv(bytes2pgno(env, env->geo_in_bytes.shrink));
VERBOSE("amended: root %" PRIaPGNO "/%" PRIaPGNO ", geo %" PRIaPGNO "/%" PRIaPGNO "-%" PRIaPGNO "/%" PRIaPGNO
VERBOSE("amending: root %" PRIaPGNO "/%" PRIaPGNO ", geo %" PRIaPGNO "/%" PRIaPGNO "-%" PRIaPGNO "/%" PRIaPGNO
" +%u -%u, txn_id %" PRIaTXN ", %s",
header.trees.main.root, header.trees.gc.root, header.geometry.lower, header.geometry.first_unallocated,
header.geometry.now, header.geometry.upper, pv2pages(header.geometry.grow_pv),
pv2pages(header.geometry.shrink_pv), unaligned_peek_u64(4, header.txnid_a), durable_caption(&header));
} else {
/* fetch back 'now/current' size, since it was ignored during comparison
* and may differ. */
/* fetch back 'now/current' size, since it was ignored during comparison and may differ. */
env->geo_in_bytes.now = pgno_align2os_bytes(env, header.geometry.now);
}
ENSURE(env, header.geometry.now >= header.geometry.first_unallocated);
} else {
/* geo-params are not pre-configured by user,
* get current values from the meta. */
/* geo-params are not pre-configured by user, get current values from the meta. */
env->geo_in_bytes.now = pgno2bytes(env, header.geometry.now);
env->geo_in_bytes.lower = pgno2bytes(env, header.geometry.lower);
env->geo_in_bytes.upper = pgno2bytes(env, header.geometry.upper);
@ -643,18 +640,19 @@ __cold int dxb_setup(MDBX_env *env, const int lck_rc, const mdbx_mode_t mode_bit
ENSURE(env, pgno_align2os_bytes(env, header.geometry.now) == env->geo_in_bytes.now);
ENSURE(env, env->geo_in_bytes.now >= used_bytes);
if (!expected_filesize)
expected_filesize = env->geo_in_bytes.now;
const uint64_t filesize_before = env->dxb_mmap.filesize;
if (unlikely(filesize_before != env->geo_in_bytes.now)) {
if (lck_rc != /* lck exclusive */ MDBX_RESULT_TRUE) {
VERBOSE("filesize mismatch (expect %" PRIuPTR "b/%" PRIaPGNO "p, have %" PRIu64 "b/%" PRIaPGNO "p), "
"assume other process working",
VERBOSE("filesize mismatch (expect %" PRIuPTR "b/%" PRIaPGNO "p, have %" PRIu64 "b/%" PRIu64
"p), assume other process working",
env->geo_in_bytes.now, bytes2pgno(env, env->geo_in_bytes.now), filesize_before,
bytes2pgno(env, (size_t)filesize_before));
filesize_before >> env->ps2ln);
} else {
if (!new_size_from_user)
WARNING("filesize mismatch (expect %" PRIuSIZE "b/%" PRIaPGNO "p, have %" PRIu64 "b/%" PRIaPGNO "p)",
env->geo_in_bytes.now, bytes2pgno(env, env->geo_in_bytes.now), filesize_before,
bytes2pgno(env, (size_t)filesize_before));
if (filesize_before != expected_filesize)
WARNING("filesize mismatch (expect %" PRIuSIZE "b/%" PRIaPGNO "p, have %" PRIu64 "b/%" PRIu64 "p)",
expected_filesize, bytes2pgno(env, expected_filesize), filesize_before, filesize_before >> env->ps2ln);
if (filesize_before < used_bytes) {
ERROR("last-page beyond end-of-file (last %" PRIaPGNO ", have %" PRIaPGNO ")",
header.geometry.first_unallocated, bytes2pgno(env, (size_t)filesize_before));