Merge with /pub/scm/linux/kernel/git/sfrench/cifs-2.6.git/

Jesper Juhl (in particular for lots of whitespace/formatting cleanup)

Vince Negri and Dave Stahl (for finding an important caching bug)

Adrian Bunk (kcalloc cleanups)

Miklos Szeredi 

Kazeon team for various fixes especially for 2.4 version.

Asser Ferno (Change Notify support)

Shaggy (Dave Kleikamp) for inumerable small fs suggestions and some good cleanup

Test case and Bug Report contributors

-------------------------------------

Version 1.39

------------

Defer close of a file handle slightly if pending writes depend on that file handle

(this reduces the EBADF bad file handle errors that can be logged under heavy

stress on writes).

Version 1.38

------------

Fix tcp socket retransmission timeouts (e.g. on ENOSPACE from the socket)

to be smaller at first (but increasing) so large write performance performance

over GigE is better.  Do not hang thread on illegal byte range lock response

from Windows (Windows can send an RFC1001 size which does not match smb size) by

allowing an SMBs TCP length to be up to a few bytes longer than it should be.

wsize and rsize can now be larger than negotiated buffer size if server

supports large readx/writex, even when directio mount flag not specified.

Write size will in many cases now be 16K instead of 4K which greatly helps

file copy performance on lightly loaded networks.  Fix oops in dnotify

when experimental config flag enabled. Make cifsFYI more granular.

Version 1.37

------------

Fix readdir caching when unlink removes file in current search buffer,

and this is followed by a rewind search to just before the deleted entry.

Do not attempt to set ctime unless atime and/or mtime change requested

(most servers throw it away anyway). Fix length check of received smbs

to be more accurate. Fix big endian problem with mapchars mount option,

and with a field returned by statfs.

Version 1.36

------------

Add support for mounting to older pre-CIFS servers such as Windows9x and ME.

For these older servers, add option for passing netbios name of server in

on mount (servernetbiosname).  Add suspend support for power management, to

avoid cifsd thread preventing software suspend from working.

Add mount option for disabling the default behavior of sending byte range lock

requests to the server (necessary for certain applications which break with

mandatory lock behavior such as Evolution), and also mount option for

requesting case insensitive matching for path based requests (requesting

case sensitive is the default).

Version 1.35

------------

Add writepage performance improvements.  Fix path name conversions

for long filenames on mounts which were done with "mapchars" mount option

specified.

specified.  Ensure multiplex ids do not collide.  Fix case in which 

rmmod can oops if done soon after last unmount.  Fix truncated

search (readdir) output when resume filename was a long filename.

Fix filename conversion when mapchars mount option was specified and

filename was a long filename.

Version 1.34

------------

kills the cifsd thread (NB: killing the cifs kernel threads is not

recommended, unmount and rmmod cifs will kill them when they are

no longer needed).  Fix readdir to ASCII servers (ie older servers

which do not support Unicode) and also require asterik.

which do not support Unicode) and also require asterisk.

Fix out of memory case in which data could be written one page

off in the page cache.

Version 1.25

------------

Fix internationlization problem in cifs readdir with filenames that map to 

Fix internationalization problem in cifs readdir with filenames that map to 

longer UTF8 strings than the string on the wire was in Unicode.  Add workaround

for readdir to netapp servers. Fix search rewind (seek into readdir to return 

non-consecutive entries).  Do not do readdir when server negotiates 

page cache could contain stale data, and write through did

not occur often enough while file was still open when read ahead

(read oplock) not allowed.  Treat "sep=" when first mount option

as an overrride of comma as the default separator between mount

as an override of comma as the default separator between mount

options. 

Version 1.01

Version 1.00

------------

Gracefully clean up failed mounts when attempting to mount to servers such as

Windows 98 that terminate tcp sessions during prototocol negotiation.  Handle

Windows 98 that terminate tcp sessions during protocol negotiation.  Handle

embedded commas in mount parsing of passwords.

Version 0.99

instance is closed so that the client does not continue using stale local

copy rather than later modified server copy of file.  Do not reconnect

when server drops the tcp session prematurely before negotiate

protocol response.  Fix oops in roepen_file when dentry freed.  Allow

protocol response.  Fix oops in reopen_file when dentry freed.  Allow

the support for CIFS Unix Extensions to be disabled via proc interface.

Version 0.98

Version 0.41

------------

Various minor fixes for Connectathon Posix "basic" file i/o test suite.  Directory caching fixed so hardlinked

files now return the correct rumber of links on fstat as they are repeatedly linked and unlinked.

files now return the correct number of links on fstat as they are repeatedly linked and unlinked.

Version 0.40

------------

and cleaned them up and made them more consistent with other cifs functions. 

7) Server support for Unix extensions is now fully detected and FindFirst is implemented both ways 

(with or without Unix exentions) but FindNext and QueryPathInfo with the Unix extensions are not completed,

(with or without Unix extensions) but FindNext and QueryPathInfo with the Unix extensions are not completed,

nor is the symlink support using the Unix extensions

8) Started adding the readlink and follow_link code 

		during the local client kernel build will be used.

		If server does not support Unicode, this parameter is

		unused.

  rsize		default read size

  wsize		default write size

  rsize		default read size (usually 16K)

  wsize		default write size (usually 16K, 32K is often better over GigE)

		maximum wsize currently allowed by CIFS is 57344 (14 4096 byte

		pages)

  rw		mount the network share read-write (note that the

		server may still consider the share read-only)

  ro		mount network share read-only

		This has no effect if the server does not support

		Unicode on the wire.

 nomapchars     Do not translate any of these seven characters (default).

 nocase         Request case insensitive path name matching (case

		sensitive is the default if the server suports it).

 nobrl          Do not send byte range lock requests to the server.

		This is necessary for certain applications that break

		with cifs style mandatory byte range locks (and most

		cifs servers do not yet support requesting advisory

		byte range locks).

 remount        remount the share (often used to change from ro to rw mounts

	        or vice versa)

kernel, e.g.  insmod cifs).  To enable a feature set it to 1 e.g.  to enable 

tracing to the kernel message log type: 

	echo 1 > /proc/fs/cifs/cifsFYI

	echo 7 > /proc/fs/cifs/cifsFYI

and for more extensive tracing including the start of smb requests and responses

cifsFYI functions as a bit mask. Setting it to 1 enables additional kernel

logging of various informational messages.  2 enables logging of non-zero

SMB return codes while 4 enables logging of requests that take longer

than one second to complete (except for byte range lock requests). 

Setting it to 4 requires defining CONFIG_CIFS_STATS2 manually in the

source code (typically by setting it in the beginning of cifsglob.h),

and setting it to seven enables all three.  Finally, tracing

the start of smb requests and responses can be enabled via:

	echo 1 > /proc/fs/cifs/traceSMB

version 1.34 April 29, 2005

version 1.37 October 9, 2005

A Partial List of Missing Features

==================================

for visible, important contributions to this module.  Here

is a partial list of the known problems and missing features:

a) Support for SecurityDescriptors for chmod/chgrp/chown so

these can be supported for Windows servers

a) Support for SecurityDescriptors(Windows/CIFS ACLs) for chmod/chgrp/chown

so that these operations can be supported to Windows servers

b) Better pam/winbind integration (e.g. to handle uid mapping

better)

b) Mapping POSIX ACLs (and eventually NFSv4 ACLs) to CIFS

SecurityDescriptors

c) multi-user mounts - multiplexed sessionsetups over single vc

(ie tcp session) - more testing needed

c) Better pam/winbind integration (e.g. to handle uid mapping

better)

d) Kerberos/SPNEGO session setup support - (started)

using FindNotify or equivalent.  - (started)

g) A few byte range testcases fail due to POSIX vs. Windows/CIFS

style byte range lock differences

style byte range lock differences.  Save byte range locks so

reconnect can replay them.  

h) quota support

h) Support unlock all (unlock 0,MAX_OFFSET)

by unlocking all known byte range locks that we locked on the file.

j) finish writepages support (multi-page write behind for improved

performance) and syncpage

i) quota support (needs minor kernel change since quota calls

to make it to network filesystems or deviceless filesystems)

j) investigate sync behavior (including syncpage) and check  

for proper behavior of intr/nointr

k) hook lower into the sockets api (as NFS/SunRPC does) to avoid the

extra copy in/out of the socket buffers in some cases.

in the Extended Attribute format their SFU clients would recognize.

q) Finish fcntl D_NOTIFY support so kde and gnome file list windows

will autorefresh (started)

will autorefresh (partially complete by Asser). Needs minor kernel

vfs change to support removing D_NOTIFY on a file.   

r) Add GUI tool to configure /proc/fs/cifs settings and for display of

the CIFS statistics (started)

q) implement support for security and trusted categories of xattrs

s) implement support for security and trusted categories of xattrs

(requires minor protocol extension) to enable better support for SELINUX

r) Implement O_DIRECT flag on open (already supported on mount)

s) Allow remapping of last remaining character (\) to +0xF000 which

(this character is valid for POSIX but not for Windows)

t) Implement O_DIRECT flag on open (already supported on mount)

t) Create UID mapping facility so server UIDs can be mapped on a per

u) Create UID mapping facility so server UIDs can be mapped on a per

mount or a per server basis to client UIDs or nobody if no mapping

exists.  This is helpful when Unix extensions are negotiated to

allow better permission checking when UIDs differ on the server

standard for asking the server for the corresponding name of a

particular uid.

v) Add support for CIFS Unix and also the newer POSIX extensions to the

server side for Samba 4.

w) Finish up the dos time conversion routines needed to return old server

time to the client (default time, of now or time 0 is used now for these 

very old servers)

x) Add support for OS/2 (LANMAN 1.2 and LANMAN2.1 based SMB servers)

y) Finish testing of Windows 9x/Windows ME server support (started).

KNOWN BUGS (updated April 29, 2005)

====================================

See http://bugzilla.samba.org - search on product "CifsVFS" for

		   unsigned char **eoc,

		   unsigned int *cls, unsigned int *con, unsigned int *tag)

{

	unsigned int def, len;

	unsigned int def = 0; 

	unsigned int len = 0;

	if (!asn1_id_decode(ctx, cls, con, tag))

		return 0;