Volker Lendecke c7211882a7 tdb: Truncate the file after expand failure ...

Without this it's very easy to create virtually huge files: ftruncate expands a
file, the pwrites fail with ENOSPC, thus the write fails. The next writer runs
into the same situation, and ftruncate-expands the file even further. tdb_check
will then spend ages reading the 4GB of zeros byte by byte.

Here we hold the freelist lock or are inside a transaction, so it is safe to
cut the file again. Nobody can have used the space that we have tried to
allocate, so we can't have any stray pointers corrupting the database.

Signed-off-by: Volker Lendecke <vl@samba.org>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>

2017-08-24 01:46:08 +02:00

..

check.c

tdb: introduce TDB_SUPPORTED_FEATURE_FLAGS

2014-05-22 21:05:15 +02:00

dump.c

tdb: fix tbdtool list freelist output

2017-08-22 23:32:13 +02:00

error.c

tdb: Fix blank line endings

2012-12-21 11:54:53 +01:00

freelist.c

tdb: defragment the freelist in tdb_allocate_from_freelist()

2014-06-26 12:16:03 +02:00

freelistcheck.c

tdb: Use tdb_null in freelistcheck

2013-02-19 15:46:45 +01:00

hash.c

tdb: enable VALGRIND to remove valgrind noise.

2011-06-08 11:05:47 +02:00

io.c

tdb: Truncate the file after expand failure

2017-08-24 01:46:08 +02:00

lock.c

tdb: document hashtable bucket offset calculation madness

2017-08-22 23:32:13 +02:00

mutex.c

tdb: runtime check for robust mutexes may hang in threaded programs

2017-04-27 14:52:16 +02:00

open.c

tdb: Clarify the CLEAR_IF_FIRST locked logic

2017-08-17 11:54:10 +02:00

rescue.c

tdb: Remove "header" from tdb_context

2013-02-05 13:18:28 +01:00

summary.c

tdb: add TDB_MUTEX_LOCKING support

2014-05-22 21:05:15 +02:00

tdb_private.h

tbd: BUCKET(-1) returns wrong offset because tdb->hash_size is an unsigned int

2017-08-22 23:32:13 +02:00

tdb.c

tdb: Avoid NULL tdb_write

2017-08-09 22:34:17 +02:00

transaction.c

tdb: Fix a typo

2017-08-24 01:46:08 +02:00

traverse.c

tdb: rename struct tdb_traverse_lock hash member to list

2017-08-22 23:32:13 +02:00