From a391b2b900bc6d5c0467869a454bdb5c51b5a3be Mon Sep 17 00:00:00 2001 From: Rusty Russell Date: Wed, 31 Aug 2011 15:25:16 +0930 Subject: [PATCH] tdb2: suppress tdb1 backend logging when locking returns EINTR or EAGAIN The TDB1 code logs multiple times on errors; we must prevent that in the limited case where locking fails. With TDB2, this can happen due to the lock function attribute, where the user supplies replacement locking functions which are allowed to return with errno EAGAIN or EINTR for various special-effects. Flooding the logs for this is unfriendly. --- ccan/tdb2/tdb1_lock.c | 3 ++- ccan/tdb2/tdb1_transaction.c | 23 +++++++++++++++-------- 2 files changed, 17 insertions(+), 9 deletions(-) diff --git a/ccan/tdb2/tdb1_lock.c b/ccan/tdb2/tdb1_lock.c index 2252e479..6498b713 100644 --- a/ccan/tdb2/tdb1_lock.c +++ b/ccan/tdb2/tdb1_lock.c @@ -180,7 +180,8 @@ int tdb1_lock(struct tdb1_context *tdb, int list, int ltype) int ret; ret = tdb1_lock_list(tdb, list, ltype, TDB_LOCK_WAIT); - if (ret) { + /* Don't log for EAGAIN and EINTR: they could have overridden lock fns */ + if (ret && errno != EAGAIN && errno != EINTR) { tdb_logerr(tdb, tdb->last_error, TDB_LOG_ERROR, "tdb1_lock failed on list %d " "ltype=%d (%s)", list, ltype, strerror(errno)); diff --git a/ccan/tdb2/tdb1_transaction.c b/ccan/tdb2/tdb1_transaction.c index 8d25f96a..9c526fb4 100644 --- a/ccan/tdb2/tdb1_transaction.c +++ b/ccan/tdb2/tdb1_transaction.c @@ -478,8 +478,11 @@ static int _tdb1_transaction_start(struct tdb1_context *tdb) /* get a read lock from the freelist to the end of file. This is upgraded to a write lock during the commit */ if (tdb1_allrecord_lock(tdb, F_RDLCK, TDB_LOCK_WAIT, true) == -1) { - tdb_logerr(tdb, tdb->last_error, TDB_LOG_ERROR, - "tdb1_transaction_start: failed to get hash locks"); + if (errno != EAGAIN && errno != EINTR) { + tdb_logerr(tdb, tdb->last_error, TDB_LOG_ERROR, + "tdb1_transaction_start:" + " failed to get hash locks"); + } goto fail_allrecord_lock; } @@ -955,9 +958,11 @@ static int _tdb1_transaction_prepare_commit(struct tdb1_context *tdb) /* upgrade the main transaction lock region to a write lock */ if (tdb1_allrecord_upgrade(tdb) == -1) { - tdb_logerr(tdb, tdb->last_error, TDB_LOG_ERROR, - "tdb1_transaction_prepare_commit:" - " failed to upgrade hash locks"); + if (errno != EAGAIN && errno != EINTR) { + tdb_logerr(tdb, tdb->last_error, TDB_LOG_ERROR, + "tdb1_transaction_prepare_commit:" + " failed to upgrade hash locks"); + } _tdb1_transaction_cancel(tdb); return -1; } @@ -965,9 +970,11 @@ static int _tdb1_transaction_prepare_commit(struct tdb1_context *tdb) /* get the open lock - this prevents new users attaching to the database during the commit */ if (tdb1_nest_lock(tdb, TDB1_OPEN_LOCK, F_WRLCK, TDB_LOCK_WAIT) == -1) { - tdb_logerr(tdb, tdb->last_error, TDB_LOG_ERROR, - "tdb1_transaction_prepare_commit:" - " failed to get open lock"); + if (errno != EAGAIN && errno != EINTR) { + tdb_logerr(tdb, tdb->last_error, TDB_LOG_ERROR, + "tdb1_transaction_prepare_commit:" + " failed to get open lock"); + } _tdb1_transaction_cancel(tdb); return -1; } -- 2.39.2