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them properly (they are difficult to do in an async fashion).
By choosing trans.in.max_data to fix in the negotiated buffer size a
server won't send us multi-part replies.
I notice that windows seems to avoid them too :)
setting of "server signing = auto", which means to offer signing
only if we have domain logons enabled (ie. we are a DC). This is a
better match for what windows clients want, as unfortunately windows
clients always use signing if it is offered, and when they use signing
they not only go slower because of the signing itself, they also
disable large readx/writex support, so they end up sending very small
IOs for.
- changed the default max xmit again, this time matching longhorn,
which uses 12288. That seems to be a fairly good compromise value.
Samba3's winbind. This is also the start of domain membership code in
Samba4, as we now (partially) parse the info3, and use it like Samba3
does.
Andrew Bartlett
We found a few months ago that TDB_CLEAR_IF_FIRST is extremely
inefficient for large numbers of connections, due to a fundamental
limitation in the way posix byte range locking is implemented. Rather
than the nasty workaround we had for Samba3, we now have a single
"cleanup tmp files" function that runs when smbd starts. That deletes
the tmp tdbs, so TDB_CLEAR_IF_FIRST is not needed at all.
rather than doing everything itself. This greatly simplifies the
code, although I really don't like the socket_recv() interface (it
always allocates memory for you, which means an extra memcpy in this
code)
- fixed several bugs in the socket_ipv4.c code, in particular client
side code used a non-blocking connect but didn't handle EINPROGRESS,
so it had no chance of working. Also fixed the error codes, using
map_nt_error_from_unix()
- cleaned up and expanded map_nt_error_from_unix()
- changed interpret_addr2() to not take a mem_ctx. It makes absolutely
no sense to allocate a fixed size 4 byte structure like this. Dozens
of places in the code were also using interpret_addr2() incorrectly
(precisely because the allocation made no sense)
This required reworking the auth_sam code, so that it would export the
'name -> server_info' functionality. It's a bit ugly from a modular
point of view, but it's what we have to do...
Fix up some of the code to better use the new talloc()
Andrew Bartlett
preparation for the full share modes and ntcreatex code that I am
working on.
highlights include:
- changed the way a backend determines if it is allowed to process a
request asynchronously. The previous method of looking at the
send_fn caused problems when an intermediate ntvfs module disabled
it, and the caller then wanted to finished processing using this
function. The new method is a REQ_CONTROL_MAY_ASYNC flag in
req->control_flags, which is also a bit easier to read
- fixed 2 bugs in the readbraw server code. One related to trying to
answer a readbraw with smb signing (which can't work, and crashed
our signing code), the second related to error handling, which
attempted to send a normal SMB error packet, when readbraw must
send a 0 read reply (as it has no header)
- added several more ntvfs_generic.c generic mapping functions. This
means that backends no longer need to implement such esoteric
functions as SMBwriteunlock() if they don't want to. The backend
can just request the mapping layer turn it into a write followed by
an unlock. This makes the backends considerably simpler as they
only need to implement one style of each function for lock, read,
write, open etc, rather than the full host of functions that SMB
provides. A backend can still choose to implement them
individually, of course, and the CIFS backend does that.
- simplified the generic structures to make them identical to the
principal call for several common SMB calls (such as
RAW_WRITE_GENERIC now being an alias for RAW_WRITE_WRITEX).
- started rewriting the pvfs_open() code in preparation for the full
ntcreatex semantics.
- in pvfs_open and ipc_open, initially allocate the open file
structure as a child of the request, so on error we don't need to
clean up. Then when we are going to succeed the open steal the
pointer into the long term backend context. This makes for much
simpler error handling (and fixes some bugs)
- use a destructor in the ipc backend to make sure that everthing is
cleaned up on receive error conditions.
- switched the ipc backend to using idtree for fnum allocation
- in the ntvfs_generic mapping routines, use a allocated secondary
structure not a stack structure to ensure the request pointer
remains valid even if the backend replies async.
- added the new messaging system, based on unix domain sockets. It
gets over 10k messages/second on my laptop without any socket
cacheing, which is better than I expected.
- added a LOCAL-MESSAGING torture test
caller doesn't have to worry about the constraint of only opening a
database a single time in a process. These wrappers will ensure that
only a single open is done, and will auto-close when the last instance
is gone.
When you are finished with a database pointer, use talloc_free() to
close it.
note that this code does not take account of the threads process
model, and does not yet take account of symlinks or hard links to tdb
files.
The motivation for this change was to avoid having to convert to/from
ucs2 strings for so many operations. Doing that was slow, used many
static buffers, and was also incorrect as it didn't cope properly with
unicode codepoints above 65536 (which could not be represented
correctly as smb_ucs2_t chars)
The two core functions that allowed this change are next_codepoint()
and push_codepoint(). These functions allow you to correctly walk a
arbitrary multi-byte string a character at a time without converting
the whole string to ucs2.
While doing this cleanup I also fixed several ucs2 string handling
bugs. See the commit for details.
The following code (which counts the number of occuraces of 'c' in a
string) shows how to use the new interface:
size_t count_chars(const char *s, char c)
{
size_t count = 0;
while (*s) {
size_t size;
codepoint_t c2 = next_codepoint(s, &size);
if (c2 == c) count++;
s += size;
}
return count;
}
