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mdbx: игнорирование EAGAIN от flock() в случае копирования на NFS.

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Леонид Юрьев (Leonid Yuriev) 2025-04-07 12:13:27 +03:00
parent 8d0eceee9f
commit 29bed7cf5d
3 changed files with 18 additions and 7 deletions
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22
src/api-copy.c
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@ -766,14 +766,24 @@ __cold static int copy2pathname(MDBX_txn *txn, const pathchar_t *dest_path, MDBX
lock_op.l_whence = SEEK_SET;
lock_op.l_start = 0;
lock_op.l_len = OFF_T_MAX;
if (MDBX_FCNTL(newfd, MDBX_F_SETLK, &lock_op)
#if (defined(__linux__) || defined(__gnu_linux__)) && defined(LOCK_EX) && \
(!defined(__ANDROID_API__) || __ANDROID_API__ >= 24)
|| flock(newfd, LOCK_EX | LOCK_NB)
#endif /* Linux */
)
if (MDBX_FCNTL(newfd, MDBX_F_SETLK, &lock_op))
rc = errno;
}
#if defined(LOCK_EX) && (!defined(__ANDROID_API__) || __ANDROID_API__ >= 24)
if (rc == MDBX_SUCCESS && flock(newfd, LOCK_EX | LOCK_NB)) {
const int err_flock = errno, err_fs = osal_check_fs_local(newfd, 0);
if (err_flock != EAGAIN || err_fs != MDBX_EREMOTE) {
ERROR("%s flock(%" MDBX_PRIsPATH ") error %d, remote-fs check status %d", "unexpected", dest_path, err_flock,
err_fs);
rc = err_flock;
} else {
WARNING("%s flock(%" MDBX_PRIsPATH ") error %d, remote-fs check status %d", "ignore", dest_path, err_flock,
err_fs);
}
}
#endif /* LOCK_EX && ANDROID_API >= 24 */
#endif /* Windows / POSIX */
if (rc == MDBX_SUCCESS)

2
src/osal.c
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@ -1745,7 +1745,7 @@ MDBX_INTERNAL int osal_check_fs_incore(mdbx_filehandle_t handle) {
return MDBX_RESULT_FALSE;
}
static int osal_check_fs_local(mdbx_filehandle_t handle, int flags) {
MDBX_INTERNAL int osal_check_fs_local(mdbx_filehandle_t handle, int flags) {
#if defined(_WIN32) || defined(_WIN64)
if (globals.running_under_Wine && !(flags & MDBX_EXCLUSIVE))
return ERROR_NOT_CAPABLE /* workaround for Wine */;

1
src/osal.h
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@ -481,6 +481,7 @@ MDBX_INTERNAL int osal_resume_threads_after_remap(mdbx_handle_array_t *array);
MDBX_INTERNAL int osal_msync(const osal_mmap_t *map, size_t offset, size_t length, enum osal_syncmode_bits mode_bits);
MDBX_INTERNAL int osal_check_fs_rdonly(mdbx_filehandle_t handle, const pathchar_t *pathname, int err);
MDBX_INTERNAL int osal_check_fs_incore(mdbx_filehandle_t handle);
MDBX_INTERNAL int osal_check_fs_local(mdbx_filehandle_t handle, int flags);
MDBX_MAYBE_UNUSED static inline uint32_t osal_getpid(void) {
STATIC_ASSERT(sizeof(mdbx_pid_t) <= sizeof(uint32_t));