changes

Linux内核自带的cifs模块

Version 1.50
------------
Fix NTLMv2 signing. NFS server mounted over cifs works (if cifs mount is
done with "serverino" mount option).  Add support for POSIX Unlink
(helps with certain sharing violation cases when server such as
Samba supports newer POSIX CIFS Protocol Extensions). Add "nounix"
mount option to allow disabling the CIFS Unix Extensions for just
that mount. Fix hang on spinlock in find_writable_file (race when
reopening file after session crash).  Byte range unlock request to
windows server could unlock more bytes (on server copy of file)
than intended if start of unlock request is well before start of
a previous byte range lock that we issued.

Version 1.49
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IPv6 support.  Enable ipv6 addresses to be passed on mount (put the ipv6
address after the "ip=" mount option, at least until mount.cifs is fixed to
handle DNS host to ipv6 name translation).  Accept override of uid or gid
on mount even when Unix Extensions are negotiated (it used to be ignored
when Unix Extensions were ignored).  This allows users to override the
default uid and gid for files when they are certain that the uids or
gids on the server do not match those of the client.  Make "sec=none"
mount override username (so that null user connection is attempted)
to match what documentation said. Support for very large reads, over 127K,
available to some newer servers (such as Samba 3.0.26 and later but
note that it also requires setting CIFSMaxBufSize at module install
time to a larger value which may hurt performance in some cases).
Make sign option force signing (or fail if server does not support it).

Version 1.48
------------
Fix mtime bouncing around from local idea of last write times to remote time.
Fix hang (in i_size_read) when simultaneous size update of same remote file
on smp system corrupts sequence number. Do not reread unnecessarily partial page
(which we are about to overwrite anyway) when writing out file opened rw.
When DOS attribute of file on non-Unix server's file changes on the server side
from read-only back to read-write, reflect this change in default file mode
(we had been leaving a file's mode read-only until the inode were reloaded).
Allow setting of attribute back to ATTR_NORMAL (removing readonly dos attribute
when archive dos attribute not set and we are changing mode back to writeable
on server which does not support the Unix Extensions).  Remove read only dos
attribute on chmod when adding any write permission (ie on any of
user/group/other (not all of user/group/other ie  0222) when
mounted to windows.  Add support for POSIX MkDir (slight performance
enhancement and eliminates the network race between the mkdir and set 
path info of the mode).


Version 1.47
------------
Fix oops in list_del during mount caused by unaligned string.
Fix file corruption which could occur on some large file
copies caused by writepages page i/o completion bug.
Seek to SEEK_END forces check for update of file size for non-cached
files. Allow file size to be updated on remote extend of locally open,
non-cached file.  Fix reconnect to newer Samba servers (or other servers
which support the CIFS Unix/POSIX extensions) so that we again tell the
server the Unix/POSIX cifs capabilities which we support (SetFSInfo).
Add experimental support for new POSIX Open/Mkdir (which returns
stat information on the open, and allows setting the mode).

Version 1.46
------------
Support deep tree mounts.  Better support OS/2, Win9x (DOS) time stamps.
Allow null user to be specified on mount ("username="). Do not return
EINVAL on readdir when filldir fails due to overwritten blocksize
(fixes FC problem).  Return error in rename 2nd attempt retry (ie report
if rename by handle also fails, after rename by path fails, we were
not reporting whether the retry worked or not). Fix NTLMv2 to
work to Windows servers (mount with option "sec=ntlmv2").

Version 1.45
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Do not time out lockw calls when using posix extensions. Do not
time out requests if server still responding reasonably fast
on requests on other threads.  Improve POSIX locking emulation,
(lock cancel now works, and unlock of merged range works even
to Windows servers now).  Fix oops on mount to lanman servers
(win9x, os/2 etc.) when null password.  Do not send listxattr
(SMB to query all EAs) if nouser_xattr specified.  Fix SE Linux
problem (instantiate inodes/dentries in right order for readdir).

Version 1.44
------------
Rewritten sessionsetup support, including support for legacy SMB
session setup needed for OS/2 and older servers such as Windows 95 and 98.
Fix oops on ls to OS/2 servers.  Add support for level 1 FindFirst
so we can do search (ls etc.) to OS/2.  Do not send NTCreateX
or recent levels of FindFirst unless server says it supports NT SMBs
(instead use legacy equivalents from LANMAN dialect). Fix to allow
NTLMv2 authentication support (now can use stronger password hashing
on mount if corresponding /proc/fs/cifs/SecurityFlags is set (0x4004).
Allow override of global cifs security flags on mount via "sec=" option(s).

Version 1.43
------------
POSIX locking to servers which support CIFS POSIX Extensions
(disabled by default controlled by proc/fs/cifs/Experimental).
Handle conversion of long share names (especially Asian languages)
to Unicode during mount. Fix memory leak in sess struct on reconnect.
Fix rare oops after acpi suspend.  Fix O_TRUNC opens to overwrite on
cifs open which helps rare case when setpathinfo fails or server does
not support it. 

Version 1.42
------------
Fix slow oplock break when mounted to different servers at the same time and
the tids match and we try to find matching fid on wrong server. Fix read
looping when signing required by server (2.6.16 kernel only). Fix readdir
vs. rename race which could cause each to hang. Return . and .. even
if server does not.  Allow searches to skip first three entries and
begin at any location. Fix oops in find_writeable_file.

Version 1.41
------------
Fix NTLMv2 security (can be enabled in /proc/fs/cifs) so customers can
configure stronger authentication.  Fix sfu symlinks so they can
be followed (not just recognized).  Fix wraparound of bcc on
read responses when buffer size over 64K and also fix wrap of
max smb buffer size when CIFSMaxBufSize over 64K.  Fix oops in
cifs_user_read and cifs_readpages (when EAGAIN on send of smb
on socket is returned over and over).  Add POSIX (advisory) byte range
locking support (requires server with newest CIFS UNIX Extensions
to the protocol implemented). Slow down negprot slightly in port 139
RFC1001 case to give session_init time on buggy servers.

Version 1.40
------------
Use fsuid (fsgid) more consistently instead of uid (gid). Improve performance
of readpages by eliminating one extra memcpy. Allow update of file size
from remote server even if file is open for write as long as mount is
directio.  Recognize share mode security and send NTLM encrypted password
on tree connect if share mode negotiated.

Version 1.39
------------
Defer close of a file handle slightly if pending writes depend on that handle
(this reduces the EBADF bad file handle errors that can be logged under heavy
stress on writes). Modify cifs Kconfig options to expose CONFIG_CIFS_STATS2 
Fix SFU style symlinks and mknod needed for servers which do not support the
CIFS Unix Extensions.  Fix setfacl/getfacl on bigendian. Timeout negative
dentries so files that the client sees as deleted but that later get created
on the server will be recognized.  Add client side permission check on setattr.
Timeout stuck requests better (where server has never responded or sent corrupt
responses)

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.  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
------------
Fix error mapping of the TOO_MANY_LINKS (hardlinks) case.
Do not oops if root user kills cifs oplock kernel thread or
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 asterisk.
Fix out of memory case in which data could be written one page
off in the page cache.

Version 1.33
------------
Fix caching problem, in which readdir of directory containing a file
which was cached could cause the file's time stamp to be updated
without invalidating the readahead data (so we could get stale
file data on the client for that file even as the server copy changed).
Cleanup response processing so cifsd can not loop when abnormally
terminated.


Version 1.32
------------
Fix oops in ls when Transact2 FindFirst (or FindNext) returns more than one
transact response for an SMB request and search entry split across two frames.
Add support for lsattr (getting ext2/ext3/reiserfs attr flags from the server)
as new protocol extensions. Do not send Get/Set calls for POSIX ACLs
unless server explicitly claims to support them in CIFS Unix extensions
POSIX ACL capability bit. Fix packet signing when multiuser mounting with
different users from the same client to the same server. Fix oops in
cifs_close. Add mount option for remapping reserved characters in
filenames (also allow recognizing files with created by SFU which have any
of these seven reserved characters, except backslash, to be recognized).
Fix invalid transact2 message (we were sometimes trying to interpret
oplock breaks as SMB responses). Add ioctl for checking that the
current uid matches the uid of the mounter (needed by umount.cifs).
Reduce the number of large buffer allocations in cifs response processing
(significantly reduces memory pressure under heavy stress with multiple
processes accessing the same server at the same time).

Version 1.31
------------
Fix updates of DOS attributes and time fields so that files on NT4 servers
do not get marked delete on close. Display sizes of cifs buffer pools in
cifs stats. Fix oops in unmount when cifsd thread being killed by 
shutdown. Add generic readv/writev and aio support. Report inode numbers 
consistently in readdir and lookup (when serverino mount option is
specified use the inode number that the server reports - for both lookup
and readdir, otherwise by default the locally generated inode number is used
for inodes created in either path since servers are not always able to 
provide unique inode numbers when exporting multiple volumes from under one
sharename).

Version 1.30
------------
Allow new nouser_xattr mount parm to disable xattr support for user namespace.
Do not flag user_xattr mount parm in dmesg.  Retry failures setting file time  
(mostly affects NT4 servers) by retry with handle based network operation. 
Add new POSIX Query FS Info for returning statfs info more accurately.
Handle passwords with multiple commas in them.

Version 1.29
------------
Fix default mode in sysfs of cifs module parms.  Remove old readdir routine.
Fix capabilities flags for large readx so as to allow reads larger than 64K.

Version 1.28
------------
Add module init parm for large SMB buffer size (to allow it to be changed
from its default of 16K) which is especially useful for large file copy
when mounting with the directio mount option. Fix oops after 
returning from mount when experimental ExtendedSecurity enabled and
SpnegoNegotiated returning invalid error. Fix case to retry better when 
peek returns from 1 to 3 bytes on socket which should have more data.
Fixed path based calls (such as cifs lookup) to handle path names
longer than 530 (now can handle PATH_MAX). Fix pass through authentication
from Samba server to DC (Samba required dummy LM password).

Version 1.27
------------
Turn off DNOTIFY (directory change notification support) by default
(unless built with the experimental flag) to fix hang with KDE
file browser. Fix DNOTIFY flag mappings.  Fix hang (in wait_event
waiting on an SMB response) in SendReceive when session dies but
reconnects quickly from another task.  Add module init  parms for
minimum number of large and small network buffers in the buffer pools,
and for the maximum number of simultaneous requests.

Version 1.26
------------
Add setfacl support to allow setting of ACLs remotely to Samba 3.10 and later
and other POSIX CIFS compliant servers.  Fix error mapping for getfacl 
to EOPNOTSUPP when server does not support posix acls on the wire. Fix 
improperly zeroed buffer in CIFS Unix extensions set times call. 

Version 1.25
------------
Fix internationalization problem in cifs readdir with filenames that map to 
longer UTF-8 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 
buffer size to small to fit filename. Add support for reading POSIX ACLs from
the server (add also acl and noacl mount options).

Version 1.24
------------
Optionally allow using server side inode numbers, rather than client generated
ones by specifying mount option "serverino" - this is required for some apps
to work which double check hardlinked files and have persistent inode numbers.