3 Improve support for multiple security contexts to the same server. We
4 used to use the same "vcnumber" for all connections which could cause
5 the server to treat subsequent connections, especially those that
6 are authenticated as guest, as reconnections, invalidating the earlier
7 user's smb session. This fix allows cifs to mount multiple times to the
8 same server with different userids without risking invalidating earlier
9 established security contexts. fsync now sends SMB Flush operation
10 to better ensure that we wait for server to write all of the data to
11 server disk (not just write it over the network). Add new mount
12 parameter to allow user to disable sending the (slow) SMB flush on
13 fsync if desired (fsync still flushes all cached write data to the server).
14 Posix file open support added (turned off after one attempt if server
15 fails to support it properly, as with Samba server versions prior to 3.3.2)
16 Fix "redzone overwritten" bug in cifs_put_tcon (CIFSTcon may allocate too
17 little memory for the "nativeFileSystem" field returned by the server
18 during mount). Endian convert inode numbers if necessary (makes it easier
19 to compare inode numbers on network files from big endian systems).
23 Add "forcemandatorylock" mount option to allow user to use mandatory
24 rather than posix (advisory) byte range locks, even though server would
25 support posix byte range locks. Fix query of root inode when prefixpath
26 specified and user does not have access to query information about the
27 top of the share. Fix problem in 2.6.28 resolving DFS paths to
28 Samba servers (worked to Windows). Fix rmdir so that pending search
29 (readdir) requests do not get invalid results which include the now
30 removed directory. Fix oops in cifs_dfs_ref.c when prefixpath is not reachable
31 when using DFS. Add better file create support to servers which support
32 the CIFS POSIX protocol extensions (this adds support for new flags
33 on create, and improves semantics for write of locked ranges).
37 Various fixes to make delete of open files behavior more predictable
38 (when delete of an open file fails we mark the file as "delete-on-close"
39 in a way that more servers accept, but only if we can first rename the
40 file to a temporary name). Add experimental support for more safely
41 handling fcntl(F_SETLEASE). Convert cifs to using blocking tcp
42 sends, and also let tcp autotune the socket send and receive buffers.
43 This reduces the number of EAGAIN errors returned by TCP/IP in
44 high stress workloads (and the number of retries on socket writes
45 when sending large SMBWriteX requests). Fix case in which a portion of
46 data can in some cases not get written to the file on the server before the
47 file is closed. Fix DFS parsing to properly handle path consumed field,
48 and to handle certain codepage conversions better. Fix mount and
49 umount race that can cause oops in mount or umount or reconnect.
53 Fix premature write failure on congested networks (we would give up
54 on EAGAIN from the socket too quickly on large writes).
55 Cifs_mkdir and cifs_create now respect the setgid bit on parent dir.
56 Fix endian problems in acl (mode from/to cifs acl) on bigendian
57 architectures. Fix problems with preserving timestamps on copying open
58 files (e.g. "cp -a") to Windows servers. For mkdir and create honor setgid bit
59 on parent directory when server supports Unix Extensions but not POSIX
60 create. Update cifs.upcall version to handle new Kerberos sec flags
61 (this requires update of cifs.upcall program from Samba). Fix memory leak
62 on dns_upcall (resolving DFS referralls). Fix plain text password
63 authentication (requires setting SecurityFlags to 0x30030 to enable
64 lanman and plain text though). Fix writes to be at correct offset when
65 file is open with O_APPEND and file is on a directio (forcediretio) mount.
66 Fix bug in rewinding readdir directory searches. Add nodfs mount option.
70 DFS support added (Microsoft Distributed File System client support needed
71 for referrals which enable a hierarchical name space among servers).
72 Disable temporary caching of mode bits to servers which do not support
73 storing of mode (e.g. Windows servers, when client mounts without cifsacl
74 mount option) and add new "dynperm" mount option to enable temporary caching
75 of mode (enable old behavior). Fix hang on mount caused when server crashes
76 tcp session during negotiate protocol.
80 Fix oops on second mount to server when null auth is used.
81 Enable experimental Kerberos support. Return writebehind errors on flush
82 and sync so that events like out of disk space get reported properly on
83 cached files. Fix setxattr failure to certain Samba versions. Fix mount
84 of second share to disconnected server session (autoreconnect on this).
85 Add ability to modify cifs acls for handling chmod (when mounted with
86 cifsacl flag). Fix prefixpath path separator so we can handle mounts
87 with prefixpaths longer than one directory (one path component) when
88 mounted to Windows servers. Fix slow file open when cifsacl
89 enabled. Fix memory leak in FindNext when the SMB call returns -EBADF.
94 Fix memory leak in statfs when mounted to very old servers (e.g.
95 Windows 9x). Add new feature "POSIX open" which allows servers
96 which support the current POSIX Extensions to provide better semantics
97 (e.g. delete for open files opened with posix open). Take into
98 account umask on posix mkdir not just older style mkdir. Add
99 ability to mount to IPC$ share (which allows CIFS named pipes to be
100 opened, read and written as if they were files). When 1st tree
101 connect fails (e.g. due to signing negotiation failure) fix
102 leak that causes cifsd not to stop and rmmod to fail to cleanup
103 cifs_request_buffers pool. Fix problem with POSIX Open/Mkdir on
104 bigendian architectures. Fix possible memory corruption when
105 EAGAIN returned on kern_recvmsg. Return better error if server
106 requires packet signing but client has disabled it. When mounted
107 with cifsacl mount option - mode bits are approximated based
108 on the contents of the ACL of the file or directory. When cifs
109 mount helper is missing convert make sure that UNC name
110 has backslash (not forward slash) between ip address of server
115 Fix NTLMv2 signing. NFS server mounted over cifs works (if cifs mount is
116 done with "serverino" mount option). Add support for POSIX Unlink
117 (helps with certain sharing violation cases when server such as
118 Samba supports newer POSIX CIFS Protocol Extensions). Add "nounix"
119 mount option to allow disabling the CIFS Unix Extensions for just
120 that mount. Fix hang on spinlock in find_writable_file (race when
121 reopening file after session crash). Byte range unlock request to
122 windows server could unlock more bytes (on server copy of file)
123 than intended if start of unlock request is well before start of
124 a previous byte range lock that we issued.
128 IPv6 support. Enable ipv6 addresses to be passed on mount (put the ipv6
129 address after the "ip=" mount option, at least until mount.cifs is fixed to
130 handle DNS host to ipv6 name translation). Accept override of uid or gid
131 on mount even when Unix Extensions are negotiated (it used to be ignored
132 when Unix Extensions were ignored). This allows users to override the
133 default uid and gid for files when they are certain that the uids or
134 gids on the server do not match those of the client. Make "sec=none"
135 mount override username (so that null user connection is attempted)
136 to match what documentation said. Support for very large reads, over 127K,
137 available to some newer servers (such as Samba 3.0.26 and later but
138 note that it also requires setting CIFSMaxBufSize at module install
139 time to a larger value which may hurt performance in some cases).
140 Make sign option force signing (or fail if server does not support it).
144 Fix mtime bouncing around from local idea of last write times to remote time.
145 Fix hang (in i_size_read) when simultaneous size update of same remote file
146 on smp system corrupts sequence number. Do not reread unnecessarily partial page
147 (which we are about to overwrite anyway) when writing out file opened rw.
148 When DOS attribute of file on non-Unix server's file changes on the server side
149 from read-only back to read-write, reflect this change in default file mode
150 (we had been leaving a file's mode read-only until the inode were reloaded).
151 Allow setting of attribute back to ATTR_NORMAL (removing readonly dos attribute
152 when archive dos attribute not set and we are changing mode back to writeable
153 on server which does not support the Unix Extensions). Remove read only dos
154 attribute on chmod when adding any write permission (ie on any of
155 user/group/other (not all of user/group/other ie 0222) when
156 mounted to windows. Add support for POSIX MkDir (slight performance
157 enhancement and eliminates the network race between the mkdir and set
158 path info of the mode).
163 Fix oops in list_del during mount caused by unaligned string.
164 Fix file corruption which could occur on some large file
165 copies caused by writepages page i/o completion bug.
166 Seek to SEEK_END forces check for update of file size for non-cached
167 files. Allow file size to be updated on remote extend of locally open,
168 non-cached file. Fix reconnect to newer Samba servers (or other servers
169 which support the CIFS Unix/POSIX extensions) so that we again tell the
170 server the Unix/POSIX cifs capabilities which we support (SetFSInfo).
171 Add experimental support for new POSIX Open/Mkdir (which returns
172 stat information on the open, and allows setting the mode).
176 Support deep tree mounts. Better support OS/2, Win9x (DOS) time stamps.
177 Allow null user to be specified on mount ("username="). Do not return
178 EINVAL on readdir when filldir fails due to overwritten blocksize
179 (fixes FC problem). Return error in rename 2nd attempt retry (ie report
180 if rename by handle also fails, after rename by path fails, we were
181 not reporting whether the retry worked or not). Fix NTLMv2 to
182 work to Windows servers (mount with option "sec=ntlmv2").
186 Do not time out lockw calls when using posix extensions. Do not
187 time out requests if server still responding reasonably fast
188 on requests on other threads. Improve POSIX locking emulation,
189 (lock cancel now works, and unlock of merged range works even
190 to Windows servers now). Fix oops on mount to lanman servers
191 (win9x, os/2 etc.) when null password. Do not send listxattr
192 (SMB to query all EAs) if nouser_xattr specified. Fix SE Linux
193 problem (instantiate inodes/dentries in right order for readdir).
197 Rewritten sessionsetup support, including support for legacy SMB
198 session setup needed for OS/2 and older servers such as Windows 95 and 98.
199 Fix oops on ls to OS/2 servers. Add support for level 1 FindFirst
200 so we can do search (ls etc.) to OS/2. Do not send NTCreateX
201 or recent levels of FindFirst unless server says it supports NT SMBs
202 (instead use legacy equivalents from LANMAN dialect). Fix to allow
203 NTLMv2 authentication support (now can use stronger password hashing
204 on mount if corresponding /proc/fs/cifs/SecurityFlags is set (0x4004).
205 Allow override of global cifs security flags on mount via "sec=" option(s).
209 POSIX locking to servers which support CIFS POSIX Extensions
210 (disabled by default controlled by proc/fs/cifs/Experimental).
211 Handle conversion of long share names (especially Asian languages)
212 to Unicode during mount. Fix memory leak in sess struct on reconnect.
213 Fix rare oops after acpi suspend. Fix O_TRUNC opens to overwrite on
214 cifs open which helps rare case when setpathinfo fails or server does
219 Fix slow oplock break when mounted to different servers at the same time and
220 the tids match and we try to find matching fid on wrong server. Fix read
221 looping when signing required by server (2.6.16 kernel only). Fix readdir
222 vs. rename race which could cause each to hang. Return . and .. even
223 if server does not. Allow searches to skip first three entries and
224 begin at any location. Fix oops in find_writeable_file.
228 Fix NTLMv2 security (can be enabled in /proc/fs/cifs) so customers can
229 configure stronger authentication. Fix sfu symlinks so they can
230 be followed (not just recognized). Fix wraparound of bcc on
231 read responses when buffer size over 64K and also fix wrap of
232 max smb buffer size when CIFSMaxBufSize over 64K. Fix oops in
233 cifs_user_read and cifs_readpages (when EAGAIN on send of smb
234 on socket is returned over and over). Add POSIX (advisory) byte range
235 locking support (requires server with newest CIFS UNIX Extensions
236 to the protocol implemented). Slow down negprot slightly in port 139
237 RFC1001 case to give session_init time on buggy servers.
241 Use fsuid (fsgid) more consistently instead of uid (gid). Improve performance
242 of readpages by eliminating one extra memcpy. Allow update of file size
243 from remote server even if file is open for write as long as mount is
244 directio. Recognize share mode security and send NTLM encrypted password
245 on tree connect if share mode negotiated.
249 Defer close of a file handle slightly if pending writes depend on that handle
250 (this reduces the EBADF bad file handle errors that can be logged under heavy
251 stress on writes). Modify cifs Kconfig options to expose CONFIG_CIFS_STATS2
252 Fix SFU style symlinks and mknod needed for servers which do not support the
253 CIFS Unix Extensions. Fix setfacl/getfacl on bigendian. Timeout negative
254 dentries so files that the client sees as deleted but that later get created
255 on the server will be recognized. Add client side permission check on setattr.
256 Timeout stuck requests better (where server has never responded or sent corrupt
261 Fix tcp socket retransmission timeouts (e.g. on ENOSPACE from the socket)
262 to be smaller at first (but increasing) so large write performance performance
263 over GigE is better. Do not hang thread on illegal byte range lock response
264 from Windows (Windows can send an RFC1001 size which does not match smb size) by
265 allowing an SMBs TCP length to be up to a few bytes longer than it should be.
266 wsize and rsize can now be larger than negotiated buffer size if server
267 supports large readx/writex, even when directio mount flag not specified.
268 Write size will in many cases now be 16K instead of 4K which greatly helps
269 file copy performance on lightly loaded networks. Fix oops in dnotify
270 when experimental config flag enabled. Make cifsFYI more granular.
274 Fix readdir caching when unlink removes file in current search buffer,
275 and this is followed by a rewind search to just before the deleted entry.
276 Do not attempt to set ctime unless atime and/or mtime change requested
277 (most servers throw it away anyway). Fix length check of received smbs
278 to be more accurate. Fix big endian problem with mapchars mount option,
279 and with a field returned by statfs.
283 Add support for mounting to older pre-CIFS servers such as Windows9x and ME.
284 For these older servers, add option for passing netbios name of server in
285 on mount (servernetbiosname). Add suspend support for power management, to
286 avoid cifsd thread preventing software suspend from working.
287 Add mount option for disabling the default behavior of sending byte range lock
288 requests to the server (necessary for certain applications which break with
289 mandatory lock behavior such as Evolution), and also mount option for
290 requesting case insensitive matching for path based requests (requesting
291 case sensitive is the default).
295 Add writepage performance improvements. Fix path name conversions
296 for long filenames on mounts which were done with "mapchars" mount option
297 specified. Ensure multiplex ids do not collide. Fix case in which
298 rmmod can oops if done soon after last unmount. Fix truncated
299 search (readdir) output when resume filename was a long filename.
300 Fix filename conversion when mapchars mount option was specified and
301 filename was a long filename.
305 Fix error mapping of the TOO_MANY_LINKS (hardlinks) case.
306 Do not oops if root user kills cifs oplock kernel thread or
307 kills the cifsd thread (NB: killing the cifs kernel threads is not
308 recommended, unmount and rmmod cifs will kill them when they are
309 no longer needed). Fix readdir to ASCII servers (ie older servers
310 which do not support Unicode) and also require asterisk.
311 Fix out of memory case in which data could be written one page
312 off in the page cache.
316 Fix caching problem, in which readdir of directory containing a file
317 which was cached could cause the file's time stamp to be updated
318 without invalidating the readahead data (so we could get stale
319 file data on the client for that file even as the server copy changed).
320 Cleanup response processing so cifsd can not loop when abnormally
326 Fix oops in ls when Transact2 FindFirst (or FindNext) returns more than one
327 transact response for an SMB request and search entry split across two frames.
328 Add support for lsattr (getting ext2/ext3/reiserfs attr flags from the server)
329 as new protocol extensions. Do not send Get/Set calls for POSIX ACLs
330 unless server explicitly claims to support them in CIFS Unix extensions
331 POSIX ACL capability bit. Fix packet signing when multiuser mounting with
332 different users from the same client to the same server. Fix oops in
333 cifs_close. Add mount option for remapping reserved characters in
334 filenames (also allow recognizing files with created by SFU which have any
335 of these seven reserved characters, except backslash, to be recognized).
336 Fix invalid transact2 message (we were sometimes trying to interpret
337 oplock breaks as SMB responses). Add ioctl for checking that the
338 current uid matches the uid of the mounter (needed by umount.cifs).
339 Reduce the number of large buffer allocations in cifs response processing
340 (significantly reduces memory pressure under heavy stress with multiple
341 processes accessing the same server at the same time).
345 Fix updates of DOS attributes and time fields so that files on NT4 servers
346 do not get marked delete on close. Display sizes of cifs buffer pools in
347 cifs stats. Fix oops in unmount when cifsd thread being killed by
348 shutdown. Add generic readv/writev and aio support. Report inode numbers
349 consistently in readdir and lookup (when serverino mount option is
350 specified use the inode number that the server reports - for both lookup
351 and readdir, otherwise by default the locally generated inode number is used
352 for inodes created in either path since servers are not always able to
353 provide unique inode numbers when exporting multiple volumes from under one
358 Allow new nouser_xattr mount parm to disable xattr support for user namespace.
359 Do not flag user_xattr mount parm in dmesg. Retry failures setting file time
360 (mostly affects NT4 servers) by retry with handle based network operation.
361 Add new POSIX Query FS Info for returning statfs info more accurately.
362 Handle passwords with multiple commas in them.
366 Fix default mode in sysfs of cifs module parms. Remove old readdir routine.
367 Fix capabilities flags for large readx so as to allow reads larger than 64K.
371 Add module init parm for large SMB buffer size (to allow it to be changed
372 from its default of 16K) which is especially useful for large file copy
373 when mounting with the directio mount option. Fix oops after
374 returning from mount when experimental ExtendedSecurity enabled and
375 SpnegoNegotiated returning invalid error. Fix case to retry better when
376 peek returns from 1 to 3 bytes on socket which should have more data.
377 Fixed path based calls (such as cifs lookup) to handle path names
378 longer than 530 (now can handle PATH_MAX). Fix pass through authentication
379 from Samba server to DC (Samba required dummy LM password).
383 Turn off DNOTIFY (directory change notification support) by default
384 (unless built with the experimental flag) to fix hang with KDE
385 file browser. Fix DNOTIFY flag mappings. Fix hang (in wait_event
386 waiting on an SMB response) in SendReceive when session dies but
387 reconnects quickly from another task. Add module init parms for
388 minimum number of large and small network buffers in the buffer pools,
389 and for the maximum number of simultaneous requests.
393 Add setfacl support to allow setting of ACLs remotely to Samba 3.10 and later
394 and other POSIX CIFS compliant servers. Fix error mapping for getfacl
395 to EOPNOTSUPP when server does not support posix acls on the wire. Fix
396 improperly zeroed buffer in CIFS Unix extensions set times call.
400 Fix internationalization problem in cifs readdir with filenames that map to
401 longer UTF-8 strings than the string on the wire was in Unicode. Add workaround
402 for readdir to netapp servers. Fix search rewind (seek into readdir to return
403 non-consecutive entries). Do not do readdir when server negotiates
404 buffer size to small to fit filename. Add support for reading POSIX ACLs from
405 the server (add also acl and noacl mount options).
409 Optionally allow using server side inode numbers, rather than client generated
410 ones by specifying mount option "serverino" - this is required for some apps
411 to work which double check hardlinked files and have persistent inode numbers.
415 Multiple bigendian fixes. On little endian systems (for reconnect after
416 network failure) fix tcp session reconnect code so we do not try first
417 to reconnect on reverse of port 445. Treat reparse points (NTFS junctions)
418 as directories rather than symlinks because we can do follow link on them.
422 Add config option to enable XATTR (extended attribute) support, mapping
423 xattr names in the "user." namespace space to SMB/CIFS EAs. Lots of
424 minor fixes pointed out by the Stanford SWAT checker (mostly missing
425 or out of order NULL pointer checks in little used error paths).
429 Add new mount parm to control whether mode check (generic_permission) is done
430 on the client. If Unix extensions are enabled and the uids on the client
431 and server do not match, client permission checks are meaningless on
432 server uids that do not exist on the client (this does not affect the
433 normal ACL check which occurs on the server). Fix default uid
434 on mknod to match create and mkdir. Add optional mount parm to allow
435 override of the default uid behavior (in which the server sets the uid
436 and gid of newly created files). Normally for network filesystem mounts
437 user want the server to set the uid/gid on newly created files (rather than
438 using uid of the client processes you would in a local filesystem).
442 Make transaction counts more consistent. Merge /proc/fs/cifs/SimultaneousOps
443 info into /proc/fs/cifs/DebugData. Fix oops in rare oops in readdir
444 (in build_wildcard_path_from_dentry). Fix mknod to pass type field
445 (block/char/fifo) properly. Remove spurious mount warning log entry when
446 credentials passed as mount argument. Set major/minor device number in
447 inode for block and char devices when unix extensions enabled.
451 Fix /proc/fs/cifs/Stats and DebugData display to handle larger
452 amounts of return data. Properly limit requests to MAX_REQ (50
453 is the usual maximum active multiplex SMB/CIFS requests per server).
454 Do not kill cifsd (and thus hurt the other SMB session) when more than one
455 session to the same server (but with different userids) exists and one
456 of the two user's smb sessions is being removed while leaving the other.
457 Do not loop reconnecting in cifsd demultiplex thread when admin
458 kills the thread without going through unmount.
462 Do not rename hardlinked files (since that should be a noop). Flush
463 cached write behind data when reopening a file after session abend,
464 except when already in write. Grab per socket sem during reconnect
465 to avoid oops in sendmsg if overlapping with reconnect. Do not
466 reset cached inode file size on readdir for files open for write on
472 Update number of blocks in file so du command is happier (in Linux a fake
473 blocksize of 512 is required for calculating number of blocks in inode).
474 Fix prepare write of partial pages to read in data from server if possible.
475 Fix race on tcpStatus field between unmount and reconnection code, causing
476 cifsd process sometimes to hang around forever. Improve out of memory
477 checks in cifs_filldir
481 Fix incorrect file size in file handle based setattr on big endian hardware.
482 Fix oops in build_path_from_dentry when out of memory. Add checks for invalid
483 and closing file structs in writepage/partialpagewrite. Add statistics
484 for each mounted share (new menuconfig option). Fix endianness problem in
485 volume information displayed in /proc/fs/cifs/DebugData (only affects
486 affects big endian architectures). Prevent renames while constructing
487 path names for open, mkdir and rmdir.
491 Change to mempools for alloc smb request buffers and multiplex structs
492 to better handle low memory problems (and potential deadlocks).
496 Fix incomplete listings of large directories on Samba servers when Unix
497 extensions enabled. Fix oops when smb_buffer can not be allocated. Fix
498 rename deadlock when writing out dirty pages at same time.
502 Fix open of files in which O_CREATE can cause the mode to change in
503 some cases. Fix case in which retry of write overlaps file close.
504 Fix PPC64 build error. Reduce excessive stack usage in smb password
505 hashing. Fix overwrite of Linux user's view of file mode to Windows servers.
509 Fixes for large file copy, signal handling, socket retry, buffer
510 allocation and low memory situations.
514 Better port 139 support to Windows servers (RFC1001/RFC1002 Session_Initialize)
515 also now allowing support for specifying client netbiosname. NT4 support added.
519 Fix reconnection (and certain failed mounts) to properly wake up the
520 blocked users thread so it does not seem hung (in some cases was blocked
521 until the cifs receive timeout expired). Fix spurious error logging
522 to kernel log when application with open network files killed.
526 Fix /proc/fs module unload warning message (that could be logged
527 to the kernel log). Fix intermittent failure in connectathon
528 test7 (hardlink count not immediately refreshed in case in which
529 inode metadata can be incorrectly kept cached when time near zero)
533 Allow file_mode and dir_mode (specified at mount time) to be enforced
534 locally (the server already enforced its own ACLs too) for servers
535 that do not report the correct mode (do not support the
536 CIFS Unix Extensions).
540 Fix some small memory leaks in some unmount error paths. Fix major leak
541 of cache pages in readpages causing multiple read oriented stress
542 testcases (including fsx, and even large file copy) to fail over time.
546 Send NTCreateX with ATTR_POSIX if Linux/Unix extensions negotiated with server.
547 This allows files that differ only in case and improves performance of file
548 creation and file open to such servers. Fix semaphore conflict which causes
549 slow delete of open file to Samba (which unfortunately can cause an oplock
550 break to self while vfs_unlink held i_sem) which can hang for 20 seconds.
554 fixes to cifs_readpages for fsx test case
558 Fix caching data integrity bug when extending file size especially when no
559 oplock on file. Fix spurious logging of valid already parsed mount options
560 that are parsed outside of the cifs vfs such as nosuid.
565 Connect to server when port number override not specified, and tcp port
566 unitialized. Reset search to restart at correct file when kernel routine
567 filldir returns error during large directory searches (readdir).
571 Fix caching problem when files opened by multiple clients in which
572 page cache could contain stale data, and write through did
573 not occur often enough while file was still open when read ahead
574 (read oplock) not allowed. Treat "sep=" when first mount option
575 as an override of comma as the default separator between mount
580 Allow passwords longer than 16 bytes. Allow null password string.
584 Gracefully clean up failed mounts when attempting to mount to servers such as
585 Windows 98 that terminate tcp sessions during protocol negotiation. Handle
586 embedded commas in mount parsing of passwords.
590 Invalidate local inode cached pages on oplock break and when last file
591 instance is closed so that the client does not continue using stale local
592 copy rather than later modified server copy of file. Do not reconnect
593 when server drops the tcp session prematurely before negotiate
594 protocol response. Fix oops in reopen_file when dentry freed. Allow
595 the support for CIFS Unix Extensions to be disabled via proc interface.
599 Fix hang in commit_write during reconnection of open files under heavy load.
600 Fix unload_nls oops in a mount failure path. Serialize writes to same socket
601 which also fixes any possible races when cifs signatures are enabled in SMBs
602 being sent out of signature sequence number order.
606 Fix byte range locking bug (endian problem) causing bad offset and
611 Fix oops (in send_sig) caused by CIFS unmount code trying to
612 wake up the demultiplex thread after it had exited. Do not log
613 error on harmless oplock release of closed handle.
617 Fix unsafe global variable usage and password hash failure on gcc 3.3.1
618 Fix problem reconnecting secondary mounts to same server after session
619 failure. Fix invalid dentry - race in mkdir when directory gets created
620 by another client between the lookup and mkdir.
624 Fix to list processing in reopen_files. Fix reconnection when server hung
625 but tcpip session still alive. Set proper timeout on socket read.
629 Add missing mount options including iocharset. SMP fixes in write and open.
630 Fix errors in reconnecting after TCP session failure. Fix module unloading
631 of default nls codepage
635 Active smb transactions should never go negative (fix double FreeXid). Fix
636 list processing in file routines. Check return code on kmalloc in open.
637 Fix spinlock usage for SMP.
641 Fix oops in reopen_files when invalid dentry. drop dentry on server rename
642 and on revalidate errors. Fix cases where pid is now tgid. Fix return code
643 on create hard link when server does not support them.
647 Fix scheduling while atomic error in getting inode info on newly created file.
648 Fix truncate of existing files opened with O_CREAT but not O_TRUNC set.
652 Fix oops on write to dead tcp session. Remove error log write for case when file open
653 O_CREAT but not O_EXCL
657 Fix non-POSIX behavior on rename of open file and delete of open file by taking
658 advantage of trans2 SetFileInfo rename facility if available on target server.
659 Retry on ENOSPC and EAGAIN socket errors.
663 Fix oops on big endian readdir. Set blksize to be even power of two (2**blkbits) to fix
664 allocation size miscalculation. After oplock token lost do not read through
669 Fix oops on empty file readahead. Fix for file size handling for locally cached files.
673 Fix oops in mkdir when server fails to return inode info. Fix oops in reopen_files
674 during auto reconnection to server after server recovered from failure.
678 Finish support for Linux 2.5 open/create changes, which removes the
679 redundant NTCreate/QPathInfo/close that was sent during file create.
680 Enable oplock by default. Enable packet signing by default (needed to
681 access many recent Windows servers)
685 Fix oops when mounting to long server names caused by inverted parms to kmalloc.
686 Fix MultiuserMount (/proc/fs/cifs configuration setting) so that when enabled
687 we will choose a cifs user session (smb uid) that better matches the local
688 uid if a) the mount uid does not match the current uid and b) we have another
689 session to the same server (ip address) for a different mount which
690 matches the current local uid.
694 Add support for mknod of block or character devices. Fix oplock
695 code (distributed caching) to properly send response to oplock
700 Finish up CIFS packet digital signing for the default
701 NTLM security case. This should help Windows 2003
702 network interoperability since it is common for
703 packet signing to be required now. Fix statfs (stat -f)
704 which recently started returning errors due to
705 invalid value (-1 instead of 0) being set in the
706 struct kstatfs f_ffiles field.
710 Fix oops on stopping oplock thread when removing cifs when
715 Fix mount options for ro (readonly), uid, gid and file and directory mode.
719 Fix errors displayed on failed mounts to be more understandable.
720 Fixed various incorrect or misleading smb to posix error code mappings.
724 Fix display of NTFS DFS junctions to display as symlinks.
725 They are the network equivalent. Fix oops in
726 cifs_partialpagewrite caused by missing spinlock protection
727 of openfile linked list. Allow writebehind caching errors to
728 be returned to the application at file close.
732 Clean up options displayed in /proc/mounts by show_options to
733 be more consistent with other filesystems.
737 Fix delete of readonly file to Windows servers. Reflect
738 presence or absence of read only dos attribute in mode
739 bits for servers that do not support CIFS Unix extensions.
740 Fix shortened results on readdir of large directories to
741 servers supporting CIFS Unix extensions (caused by
742 incorrect resume key).
746 Fix truncate bug (set file size) that could cause hangs e.g. running fsx
750 unload nls if mount fails.
754 Add resume key support to search (readdir) code to workaround
755 Windows bug. Add /proc/fs/cifs/LookupCacheEnable which
756 allows disabling caching of attribute information for
761 Add more oplock handling (distributed caching code). Remove
762 dead code. Remove excessive stack space utilization from
767 Fix oops in get dfs referral (triggered when null path sent in to
768 mount). Add support for overriding rsize at mount time.
772 Fix buffer overrun in readdir which caused intermittent kernel oopses.
773 Fix writepage code to release kmap on write data. Allow "-ip=" new
774 mount option to be passed in on parameter distinct from the first part
775 (server name portion of) the UNC name. Allow override of the
776 tcp port of the target server via new mount option "-port="
780 Fix search handle leak on rewind. Fix setuid and gid so that they are
781 reflected in the local inode immediately. Cleanup of whitespace
782 to make 2.4 and 2.5 versions more consistent.
787 Fix signal sending so that captive thread (cifsd) exits on umount
788 (which was causing the warning in kmem_cache_free of the request buffers
789 at rmmod time). This had broken as a sideeffect of the recent global
790 kernel change to daemonize. Fix memory leak in readdir code which
791 showed up in "ls -R" (and applications that did search rewinding).
795 Reconnect tids and fids after session reconnection (still do not
796 reconnect byte range locks though). Fix problem caching
797 lookup information for directory inodes, improving performance,
798 especially in deep directory trees. Fix various build warnings.
802 Finish fixes to commit write for caching/readahead consistency. fsx
803 now works to Samba servers. Fix oops caused when readahead
804 was interrupted by a signal.
808 Fix data corruption (in partial page after truncate) that caused fsx to
809 fail to Windows servers. Cleaned up some extraneous error logging in
810 common error paths. Add generic sendfile support.
814 Fix memory leak in AllocMidQEntry.
815 Finish reconnection logic, so connection with server can be dropped
816 (or server rebooted) and the cifs client will reconnect.
820 Fix temporary socket leak when bad userid or password specified
821 (or other SMBSessSetup failure). Increase maximum buffer size to slightly
822 over 16K to allow negotiation of up to Samba and Windows server default read
823 sizes. Add support for readpages
827 Fix oops when username not passed in on mount. Extensive fixes and improvements
828 to error logging (strip redundant newlines, change debug macros to ensure newline
829 passed in and to be more consistent). Fix writepage wrong file handle problem,
830 a readonly file handle could be incorrectly used to attempt to write out
831 file updates through the page cache to multiply open files. This could cause
832 the iozone benchmark to fail on the fwrite test. Fix bug mounting two different
833 shares to the same Windows server when using different usernames
834 (doing this to Samba servers worked but Windows was rejecting it) - now it is
835 possible to use different userids when connecting to the same server from a
836 Linux client. Fix oops when treeDisconnect called during unmount on
837 previously freed socket.
841 Fix oops in readpages caused by not setting address space operations in inode in
846 Includes support for deleting of open files and renaming over existing files (per POSIX
847 requirement). Add readlink support for Windows junction points (directory symlinks).
851 Changed read and write to go through pagecache. Added additional address space operations.
852 Memory mapped operations now working.
856 Added writepage code for additional memory mapping support. Fixed leak in xids causing
857 the simultaneous operations counter (/proc/fs/cifs/SimultaneousOps) to increase on
858 every stat call. Additional formatting cleanup.
862 Fix bigendian bug in order of time conversion. Merge 2.5 to 2.4 version. Formatting cleanup.
866 Fixes from Zwane Mwaikambo for adding missing return code checking in a few places.
867 Also included a modified version of his fix to protect global list manipulation of
868 the smb session and tree connection and mid related global variables.
872 Fix problem with captive thread hanging around at unmount time. Adjust to 2.5.42-pre
873 changes to superblock layout. Remove wasteful allocation of smb buffers (now the send
874 buffer is reused for responses). Add more oplock handling. Additional minor cleanup.
878 More stylistic updates to better match kernel style. Add additional statistics
879 for filesystem which can be viewed via /proc/fs/cifs. Add more pieces of NTLMv2
880 and CIFS Packet Signing enablement.
884 Replace call to sleep_on with safer wait_on_event.
885 Make stylistic changes to better match kernel style recommendations.
886 Remove most typedef usage (except for the PDUs themselves).
890 Update mount so the -unc mount option is no longer required (the ip address can be specified
891 in a UNC style device name. Implementation of readpage/writepage started.
895 Fix intermittent problem with incorrect smb header checking on badly
896 fragmented tcp responses
900 Fixes to setting of allocation size and file size.
904 Various 2.5.38 fixes. Now works on 2.5.38
908 Prepare for 2.5 kernel merge. Remove ifdefs.
912 Socket buffer management fixes. Fix dual free.
916 Various big endian fixes for hardlinks and symlinks and also for dfs.
920 Various big endian fixes for servers with Unix extensions such as Samba
924 Various FindNext fixes for incorrect filenames on large directory searches on big endian
925 clients. basic posix file i/o tests now work on big endian machines, not just le
929 SessionSetup and NegotiateProtocol now work from Big Endian machines.
930 Various Big Endian fixes found during testing on the Linux on 390. Various fixes for compatibility with older
931 versions of 2.4 kernel (now builds and works again on kernels at least as early as 2.4.7).
935 Various minor fixes for Connectathon Posix "basic" file i/o test suite. Directory caching fixed so hardlinked
936 files now return the correct number of links on fstat as they are repeatedly linked and unlinked.
940 Implemented "Raw" (i.e. not encapsulated in SPNEGO) NTLMSSP (i.e. the Security Provider Interface used to negotiate
941 session advanced session authentication). Raw NTLMSSP is preferred by Windows 2000 Professional and Windows XP.
942 Began implementing support for SPNEGO encapsulation of NTLMSSP based session authentication blobs
943 (which is the mechanism preferred by Windows 2000 server in the absence of Kerberos).
947 Introduced optional mount helper utility mount.cifs and made coreq changes to cifs vfs to enable
948 it. Fixed a few bugs in the DFS code (e.g. bcc two bytes too short and incorrect uid in PDU).
952 Rewrote much of connection and mount/unmount logic to handle bugs with
953 multiple uses to same share, multiple users to same server etc.
957 Fixed major problem with dentry corruption (missing call to dput)
961 Rewrite of readdir code to fix bug. Various fixes for bigendian machines.
962 Begin adding oplock support. Multiusermount and oplockEnabled flags added to /proc/fs/cifs
963 although corresponding function not fully implemented in the vfs yet
967 Fixed dentry caching bug, misc. cleanup
971 Fixed 2.5 support to handle build and configure changes as well as misc. 2.5 changes. Now can build
972 on current 2.5 beta version (2.5.24) of the Linux kernel as well as on 2.4 Linux kernels.
973 Support for STATUS codes (newer 32 bit NT error codes) added. DFS support begun to be added.
977 Unix extensions (symlink, readlink, hardlink, chmod and some chgrp and chown) implemented
978 and tested against Samba 2.2.5
983 1) Fixed lockrange to be correct (it was one byte too short)
985 2) Fixed GETLK (i.e. the fcntl call to test a range of bytes in a file to see if locked) to correctly
986 show range as locked when there is a conflict with an existing lock.
988 3) default file perms are now 2767 (indicating support for mandatory locks) instead of 777 for directories
989 in most cases. Eventually will offer optional ability to query server for the correct perms.
991 3) Fixed eventual trap when mounting twice to different shares on the same server when the first succeeded
992 but the second one was invalid and failed (the second one was incorrectly disconnecting the tcp and smb
995 4) Fixed error logging of valid mount options
997 5) Removed logging of password field.
999 6) Moved negotiate, treeDisconnect and uloggoffX (only tConx and SessSetup remain in connect.c) to cifssmb.c
1000 and cleaned them up and made them more consistent with other cifs functions.
1002 7) Server support for Unix extensions is now fully detected and FindFirst is implemented both ways
1003 (with or without Unix extensions) but FindNext and QueryPathInfo with the Unix extensions are not completed,
1004 nor is the symlink support using the Unix extensions
1006 8) Started adding the readlink and follow_link code
projects / linux-2.6 / blob