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ITS#8106 retry writes on EINTR

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This commit is contained in:
Howard Chu 2015-04-17 18:32:54 +01:00
parent 5c89827817
commit 32d46d4ea2
1 changed files with 11 additions and 1 deletions
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12
libraries/liblmdb/mdb.c
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@ -3133,6 +3133,7 @@ mdb_page_flush(MDB_txn *txn, int keep)
/* Write up to MDB_COMMIT_PAGES dirty pages at a time. */
if (pos!=next_pos || n==MDB_COMMIT_PAGES || wsize+size>MAX_WRITE) {
if (n) {
retry_write:
/* Write previous page(s) */
#ifdef MDB_USE_PWRITEV
wres = pwritev(env->me_fd, iov, n, wpos);
@ -3140,8 +3141,11 @@ mdb_page_flush(MDB_txn *txn, int keep)
if (n == 1) {
wres = pwrite(env->me_fd, iov[0].iov_base, wsize, wpos);
} else {
retry_seek:
if (lseek(env->me_fd, wpos, SEEK_SET) == -1) {
rc = ErrCode();
if (rc == EINTR)
goto retry_seek;
DPRINTF(("lseek: %s", strerror(rc)));
return rc;
}
@ -3151,6 +3155,8 @@ mdb_page_flush(MDB_txn *txn, int keep)
if (wres != wsize) {
if (wres < 0) {
rc = ErrCode();
if (rc == EINTR)
goto retry_write;
DPRINTF(("Write error: %s", strerror(rc)));
} else {
rc = EIO; /* TODO: Use which error code? */
@ -3520,7 +3526,8 @@ mdb_env_init_meta(MDB_env *env, MDB_meta *meta)
int len;
#define DO_PWRITE(rc, fd, ptr, size, len, pos) do { \
len = pwrite(fd, ptr, size, pos); \
rc = (len >= 0); } while(0)
if (len == -1 && ErrCode() == EINTR) continue; \
rc = (len >= 0); break; } while(1)
#endif
DPUTS("writing new meta page");
@ -3625,6 +3632,7 @@ mdb_env_write_meta(MDB_txn *txn)
/* Write to the SYNC fd */
mfd = env->me_flags & (MDB_NOSYNC|MDB_NOMETASYNC) ?
env->me_fd : env->me_mfd;
retry_write:
#ifdef _WIN32
{
memset(&ov, 0, sizeof(ov));
@ -3637,6 +3645,8 @@ mdb_env_write_meta(MDB_txn *txn)
#endif
if (rc != len) {
rc = rc < 0 ? ErrCode() : EIO;
if (rc == EINTR)
goto retry_write;
DPUTS("write failed, disk error?");
/* On a failure, the pagecache still contains the new data.
* Write some old data back, to prevent it from being used.