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When something in the cluster blocks, it can happen that we wait indefinitely
long for ctdb, just adding to the blocking condition. In theory, nothing should
block, but as someone said "In practice the difference between theory and
practice is larger than in theory". This adds a timeout parameter in seconds,
after which we stop waiting for ctdb and panic.
smbd just crashed on me: In a debug message I called a routine preparing a
string that itself used debug_ctx. The outer routine also used it after the
inner routine had returned. It was still referencing the talloc context
that the outer debug_ctx() had given us, which the inner DEBUG had already
freed.
In ctdb_transaction_commit(), when the trans2_commit control fails, there
is a race condition in the 1 second sleep between the local transaction_cancel
and the call to ctdb_replay_transaction(): The database is not locked, and
neither is the transaction_lock record. So another client can start and possibly
complete a new transaction in this gap, but only on the same node: The locking
of the transaction_lock record on a different node which involves migration of
the record to the other node has been disabled by introduction of the
transaction_active flag on the db which closes precisely this gap from the start
of the commit until the call to TRANS2_FINISH or TRANS2_ERROR.
But this mechanism does not cover the case where a process on the same node
tries to start a transaction: There is no obstacle to locking the transaction_lock
record because the record does not need to be migrated.
This commit closes this race condition in ctdb_transaction_fetch_start()
by using the new ctdb_ctrl_transaction_active() call to ask the local
ctdb daemon whether it has a transaction running on the database.
If so, the check is repeated until the running transaction is done.
This does introduce an additional call to the local ctdbd when starting
transactions, but it does close the (hopefully) last race condition.
Michael
There are two races in concurrent transactions on a single node.
One in starting a transaction and one with replay during commit.
This commit closes the first race by storing the client pid in the
transaction-lock record and comparing the stored pid against its own
pid after releasing the lock and refetching the record inside the
transaction.
Michael
Make sure we do not reference our internal tdb directly.
Let configure define what tdb.h file to use so that builds that use an
extrenal tdb do not include 2 different versions of the tdb header.
In Win 32 we have
NERR_GroupNotFound which maps to WERR_GROUP_NOT_FOUND currently
and we have
ERROR_GROUP_NOT_FOUND which maps to nothing, so it is to be added
Signed-off-by: Anatoliy Atanasov <anatoliy.atanasov@postpath.com>
Revert change from 3.3 -> 3.4 with read_socket_with_timeout changed
from sys_read() to sys_recv(). read_socket_with_timeout() is called
with non-fd's (with a pty in chgpasswd.c and with a disk file in
lib/dbwrap_file.c via read_data()). recv works for the disk file,
but not the pty. Change the name of read_socket_with_timeout() to
read_fd_with_timeout() to make this clear (and add comments).
Jeremy.
This is a small performance optimization. Instead of opening the tdb
on every smb connection in the forked child process, we now open it in
the parent and share the fd.
This also reduces the total fd usage in the system.
Explictly pass the facility from both smbd and full_audit to syslog.
Really the only major change is to not call openlog() in full_audit if
WITH_SYSLOG is defined, which implies that smbd is already using
syslog. This allows full audit to piggy-back on the same ident as
smbd, while still differentiating the logging via the facility.
On filesystems that can't store less than one second timestamps,
round the incoming timestamp set requests so the client can't discover
that a time set request has been truncated by the filesystem.
Needs backporting to 3.4, 3.3, 3.2 and (even) 3.0.
Jeremy
This function wraps the action() callback into a db
transaction and the transaction is either committed
or cancelled, depending on the return value of
the action function.
Michael
This provides a compromise between stability and performance: gencache is a
persistent database these days that for performance reasons can not use tdb
transactions for all writes. This patch splits up gencache into gencache.tdb
and gencache_notrans.tdb. gencache_notrans is used with CLEAR_IF_FIRST, writes
to it don't use transactions. By default every 5 minutes and when a program
exits, all entries from _notrans.tdb are transferred to gencache.tdb in one
transaction.
gencache_get/set/del/iterate call gencache_init() internally anyway. And we've
been very lazy calling gencache_shutdown, so this seems not really required.
create time from the existing timestamps (for systems
that need to do this). Once the write time is changed
via a sticky write, the create time might need to be
recalculated. To do this I needed to add a bool into
struct stat_ex to remember if the st_ex_btime field
was calculated, or read from the OS. Also fixed the
returning of modified write timestamps in the return
from NTCreateX, SMBattr and SMBattrE (which weren't
taking into account the modified timestamp stored
in the open file table). Attempting to fix an issue
with Excel 2003 and offline files. Volker and Metze,
please review.
Jeremy
This reverts commit 1d3dcd1e42.
This fixes Bug #6531 (Pid File creation.)
Usually, I would extend is_default_dyn_XYZ() so that it returns true
when dyn_XYZ has not been set yet or when its value is equal to the
compiled in default value XZY. But this would have a change in effect
in popt_common and torture.c: is_default_dyn_CONFIGFILE() is used
there to check whether the config file should be overwritten by the
contents of the environment variable SMB_CONF_PATH. Currently this
is only done when set_dyn_CONFIGFILE() had _not_ previously been called
at all, not even with the same value as the compiled in default.
Michael
By adding a new common setup_logging_stdout() API, we no longer need to abuse the ABI compatability between the different setup_logging() calls in Samba3 and Samba4's DEBUG() subsystems.
The revert of 49a6d757b4 works with this
to fix bug 6211.
Andrew Bartlett
This attaches the data to the tldap_message instead of the tevent_req.
It adds tldap_ctx_lastmsg() to retrieve the last message for the users of
the sync wrappers.
We will have arrays of controls passed to tldap.c. Follow a mantra from the
classic book "Thinking Forth" by Leo Brodie: Favor counts over terminators :-)
This makes the parameter lists to tldap pretty long, but everyone will have
wrapper routines anyway, see for example tldap_search_fmt. And the OpenLDAP
manpages call the non-_ext routines deprecated, probably for a reason.
"net ads leave" stopped working when "modify properties"
permissions were not granted (meaning you had to be allowed
to disable the account that you were about to delete).
Libnetapi should not delete machine accounts, as this does not
happen on win32. The WKSSVC_JOIN_FLAGS_ACCOUNT_DELETE flag
really means "disable" (both in practice and docs).
However, to keep the functionality in "net ads leave", we
will still try to do the delete. If this fails, we try
to do the disable.
Additionally, it is possible in windows to not disable or
delete the account, but just tell the local machine that it
is no longer in the account. libnet can now do this as well.
This adds the ability to attach extended information to a tldap_context. This
will become useful once we start to do automatic reconnects for example, a
callback function might want attach a pointer to credentials so that it can
rebind.
The initial user of this will be a cached rootdse, so that things like the
ability to do paged searches can be cached.
