Based on kernel version 4.16.1. Page generated on 2018-04-09 11:53 EST.
1 Version 1.62 2 ------------ 3 Add sockopt=TCP_NODELAY mount option. EA (xattr) routines hardened 4 to more strictly handle corrupt frames. 5 6 Version 1.61 7 ------------ 8 Fix append problem to Samba servers (files opened with O_APPEND could 9 have duplicated data). Fix oops in cifs_lookup. Workaround problem 10 mounting to OS/400 Netserve. Fix oops in cifs_get_tcp_session. 11 Disable use of server inode numbers when server only 12 partially supports them (e.g. for one server querying inode numbers on 13 FindFirst fails but QPathInfo queries works). Fix oops with dfs in 14 cifs_put_smb_ses. Fix mmap to work on directio mounts (needed 15 for OpenOffice when on forcedirectio mount e.g.) 16 17 Version 1.60 18 ------------- 19 Fix memory leak in reconnect. Fix oops in DFS mount error path. 20 Set s_maxbytes to smaller (the max that vfs can handle) so that 21 sendfile will now work over cifs mounts again. Add noforcegid 22 and noforceuid mount parameters. Fix small mem leak when using 23 ntlmv2. Fix 2nd mount to same server but with different port to 24 be allowed (rather than reusing the 1st port) - only when the 25 user explicitly overrides the port on the 2nd mount. 26 27 Version 1.59 28 ------------ 29 Client uses server inode numbers (which are persistent) rather than 30 client generated ones by default (mount option "serverino" turned 31 on by default if server supports it). Add forceuid and forcegid 32 mount options (so that when negotiating unix extensions specifying 33 which uid mounted does not immediately force the server's reported 34 uids to be overridden). Add support for scope mount parm. Improve 35 hard link detection to use same inode for both. Do not set 36 read-only dos attribute on directories (for chmod) since Windows 37 explorer special cases this attribute bit for directories for 38 a different purpose. 39 40 Version 1.58 41 ------------ 42 Guard against buffer overruns in various UCS-2 to UTF-8 string conversions 43 when the UTF-8 string is composed of unusually long (more than 4 byte) converted 44 characters. Add support for mounting root of a share which redirects immediately 45 to DFS target. Convert string conversion functions from Unicode to more 46 accurately mark string length before allocating memory (which may help the 47 rare cases where a UTF-8 string is much larger than the UCS2 string that 48 we converted from). Fix endianness of the vcnum field used during 49 session setup to distinguish multiple mounts to same server from different 50 userids. Raw NTLMSSP fixed (it requires /proc/fs/cifs/experimental 51 flag to be set to 2, and mount must enable krb5 to turn on extended security). 52 Performance of file create to Samba improved (posix create on lookup 53 removes 1 of 2 network requests sent on file create) 54 55 Version 1.57 56 ------------ 57 Improve support for multiple security contexts to the same server. We 58 used to use the same "vcnumber" for all connections which could cause 59 the server to treat subsequent connections, especially those that 60 are authenticated as guest, as reconnections, invalidating the earlier 61 user's smb session. This fix allows cifs to mount multiple times to the 62 same server with different userids without risking invalidating earlier 63 established security contexts. fsync now sends SMB Flush operation 64 to better ensure that we wait for server to write all of the data to 65 server disk (not just write it over the network). Add new mount 66 parameter to allow user to disable sending the (slow) SMB flush on 67 fsync if desired (fsync still flushes all cached write data to the server). 68 Posix file open support added (turned off after one attempt if server 69 fails to support it properly, as with Samba server versions prior to 3.3.2) 70 Fix "redzone overwritten" bug in cifs_put_tcon (CIFSTcon may allocate too 71 little memory for the "nativeFileSystem" field returned by the server 72 during mount). Endian convert inode numbers if necessary (makes it easier 73 to compare inode numbers on network files from big endian systems). 74 75 Version 1.56 76 ------------ 77 Add "forcemandatorylock" mount option to allow user to use mandatory 78 rather than posix (advisory) byte range locks, even though server would 79 support posix byte range locks. Fix query of root inode when prefixpath 80 specified and user does not have access to query information about the 81 top of the share. Fix problem in 2.6.28 resolving DFS paths to 82 Samba servers (worked to Windows). Fix rmdir so that pending search 83 (readdir) requests do not get invalid results which include the now 84 removed directory. Fix oops in cifs_dfs_ref.c when prefixpath is not reachable 85 when using DFS. Add better file create support to servers which support 86 the CIFS POSIX protocol extensions (this adds support for new flags 87 on create, and improves semantics for write of locked ranges). 88 89 Version 1.55 90 ------------ 91 Various fixes to make delete of open files behavior more predictable 92 (when delete of an open file fails we mark the file as "delete-on-close" 93 in a way that more servers accept, but only if we can first rename the 94 file to a temporary name). Add experimental support for more safely 95 handling fcntl(F_SETLEASE). Convert cifs to using blocking tcp 96 sends, and also let tcp autotune the socket send and receive buffers. 97 This reduces the number of EAGAIN errors returned by TCP/IP in 98 high stress workloads (and the number of retries on socket writes 99 when sending large SMBWriteX requests). Fix case in which a portion of 100 data can in some cases not get written to the file on the server before the 101 file is closed. Fix DFS parsing to properly handle path consumed field, 102 and to handle certain codepage conversions better. Fix mount and 103 umount race that can cause oops in mount or umount or reconnect. 104 105 Version 1.54 106 ------------ 107 Fix premature write failure on congested networks (we would give up 108 on EAGAIN from the socket too quickly on large writes). 109 Cifs_mkdir and cifs_create now respect the setgid bit on parent dir. 110 Fix endian problems in acl (mode from/to cifs acl) on bigendian 111 architectures. Fix problems with preserving timestamps on copying open 112 files (e.g. "cp -a") to Windows servers. For mkdir and create honor setgid bit 113 on parent directory when server supports Unix Extensions but not POSIX 114 create. Update cifs.upcall version to handle new Kerberos sec flags 115 (this requires update of cifs.upcall program from Samba). Fix memory leak 116 on dns_upcall (resolving DFS referralls). Fix plain text password 117 authentication (requires setting SecurityFlags to 0x30030 to enable 118 lanman and plain text though). Fix writes to be at correct offset when 119 file is open with O_APPEND and file is on a directio (forcediretio) mount. 120 Fix bug in rewinding readdir directory searches. Add nodfs mount option. 121 122 Version 1.53 123 ------------ 124 DFS support added (Microsoft Distributed File System client support needed 125 for referrals which enable a hierarchical name space among servers). 126 Disable temporary caching of mode bits to servers which do not support 127 storing of mode (e.g. Windows servers, when client mounts without cifsacl 128 mount option) and add new "dynperm" mount option to enable temporary caching 129 of mode (enable old behavior). Fix hang on mount caused when server crashes 130 tcp session during negotiate protocol. 131 132 Version 1.52 133 ------------ 134 Fix oops on second mount to server when null auth is used. 135 Enable experimental Kerberos support. Return writebehind errors on flush 136 and sync so that events like out of disk space get reported properly on 137 cached files. Fix setxattr failure to certain Samba versions. Fix mount 138 of second share to disconnected server session (autoreconnect on this). 139 Add ability to modify cifs acls for handling chmod (when mounted with 140 cifsacl flag). Fix prefixpath path separator so we can handle mounts 141 with prefixpaths longer than one directory (one path component) when 142 mounted to Windows servers. Fix slow file open when cifsacl 143 enabled. Fix memory leak in FindNext when the SMB call returns -EBADF. 144 145 146 Version 1.51 147 ------------ 148 Fix memory leak in statfs when mounted to very old servers (e.g. 149 Windows 9x). Add new feature "POSIX open" which allows servers 150 which support the current POSIX Extensions to provide better semantics 151 (e.g. delete for open files opened with posix open). Take into 152 account umask on posix mkdir not just older style mkdir. Add 153 ability to mount to IPC$ share (which allows CIFS named pipes to be 154 opened, read and written as if they were files). When 1st tree 155 connect fails (e.g. due to signing negotiation failure) fix 156 leak that causes cifsd not to stop and rmmod to fail to cleanup 157 cifs_request_buffers pool. Fix problem with POSIX Open/Mkdir on 158 bigendian architectures. Fix possible memory corruption when 159 EAGAIN returned on kern_recvmsg. Return better error if server 160 requires packet signing but client has disabled it. When mounted 161 with cifsacl mount option - mode bits are approximated based 162 on the contents of the ACL of the file or directory. When cifs 163 mount helper is missing convert make sure that UNC name 164 has backslash (not forward slash) between ip address of server 165 and the share name. 166 167 Version 1.50 168 ------------ 169 Fix NTLMv2 signing. NFS server mounted over cifs works (if cifs mount is 170 done with "serverino" mount option). Add support for POSIX Unlink 171 (helps with certain sharing violation cases when server such as 172 Samba supports newer POSIX CIFS Protocol Extensions). Add "nounix" 173 mount option to allow disabling the CIFS Unix Extensions for just 174 that mount. Fix hang on spinlock in find_writable_file (race when 175 reopening file after session crash). Byte range unlock request to 176 windows server could unlock more bytes (on server copy of file) 177 than intended if start of unlock request is well before start of 178 a previous byte range lock that we issued. 179 180 Version 1.49 181 ------------ 182 IPv6 support. Enable ipv6 addresses to be passed on mount (put the ipv6 183 address after the "ip=" mount option, at least until mount.cifs is fixed to 184 handle DNS host to ipv6 name translation). Accept override of uid or gid 185 on mount even when Unix Extensions are negotiated (it used to be ignored 186 when Unix Extensions were ignored). This allows users to override the 187 default uid and gid for files when they are certain that the uids or 188 gids on the server do not match those of the client. Make "sec=none" 189 mount override username (so that null user connection is attempted) 190 to match what documentation said. Support for very large reads, over 127K, 191 available to some newer servers (such as Samba 3.0.26 and later but 192 note that it also requires setting CIFSMaxBufSize at module install 193 time to a larger value which may hurt performance in some cases). 194 Make sign option force signing (or fail if server does not support it). 195 196 Version 1.48 197 ------------ 198 Fix mtime bouncing around from local idea of last write times to remote time. 199 Fix hang (in i_size_read) when simultaneous size update of same remote file 200 on smp system corrupts sequence number. Do not reread unnecessarily partial page 201 (which we are about to overwrite anyway) when writing out file opened rw. 202 When DOS attribute of file on non-Unix server's file changes on the server side 203 from read-only back to read-write, reflect this change in default file mode 204 (we had been leaving a file's mode read-only until the inode were reloaded). 205 Allow setting of attribute back to ATTR_NORMAL (removing readonly dos attribute 206 when archive dos attribute not set and we are changing mode back to writeable 207 on server which does not support the Unix Extensions). Remove read only dos 208 attribute on chmod when adding any write permission (ie on any of 209 user/group/other (not all of user/group/other ie 0222) when 210 mounted to windows. Add support for POSIX MkDir (slight performance 211 enhancement and eliminates the network race between the mkdir and set 212 path info of the mode). 213 214 215 Version 1.47 216 ------------ 217 Fix oops in list_del during mount caused by unaligned string. 218 Fix file corruption which could occur on some large file 219 copies caused by writepages page i/o completion bug. 220 Seek to SEEK_END forces check for update of file size for non-cached 221 files. Allow file size to be updated on remote extend of locally open, 222 non-cached file. Fix reconnect to newer Samba servers (or other servers 223 which support the CIFS Unix/POSIX extensions) so that we again tell the 224 server the Unix/POSIX cifs capabilities which we support (SetFSInfo). 225 Add experimental support for new POSIX Open/Mkdir (which returns 226 stat information on the open, and allows setting the mode). 227 228 Version 1.46 229 ------------ 230 Support deep tree mounts. Better support OS/2, Win9x (DOS) time stamps. 231 Allow null user to be specified on mount ("username="). Do not return 232 EINVAL on readdir when filldir fails due to overwritten blocksize 233 (fixes FC problem). Return error in rename 2nd attempt retry (ie report 234 if rename by handle also fails, after rename by path fails, we were 235 not reporting whether the retry worked or not). Fix NTLMv2 to 236 work to Windows servers (mount with option "sec=ntlmv2"). 237 238 Version 1.45 239 ------------ 240 Do not time out lockw calls when using posix extensions. Do not 241 time out requests if server still responding reasonably fast 242 on requests on other threads. Improve POSIX locking emulation, 243 (lock cancel now works, and unlock of merged range works even 244 to Windows servers now). Fix oops on mount to lanman servers 245 (win9x, os/2 etc.) when null password. Do not send listxattr 246 (SMB to query all EAs) if nouser_xattr specified. Fix SE Linux 247 problem (instantiate inodes/dentries in right order for readdir). 248 249 Version 1.44 250 ------------ 251 Rewritten sessionsetup support, including support for legacy SMB 252 session setup needed for OS/2 and older servers such as Windows 95 and 98. 253 Fix oops on ls to OS/2 servers. Add support for level 1 FindFirst 254 so we can do search (ls etc.) to OS/2. Do not send NTCreateX 255 or recent levels of FindFirst unless server says it supports NT SMBs 256 (instead use legacy equivalents from LANMAN dialect). Fix to allow 257 NTLMv2 authentication support (now can use stronger password hashing 258 on mount if corresponding /proc/fs/cifs/SecurityFlags is set (0x4004). 259 Allow override of global cifs security flags on mount via "sec=" option(s). 260 261 Version 1.43 262 ------------ 263 POSIX locking to servers which support CIFS POSIX Extensions 264 (disabled by default controlled by proc/fs/cifs/Experimental). 265 Handle conversion of long share names (especially Asian languages) 266 to Unicode during mount. Fix memory leak in sess struct on reconnect. 267 Fix rare oops after acpi suspend. Fix O_TRUNC opens to overwrite on 268 cifs open which helps rare case when setpathinfo fails or server does 269 not support it. 270 271 Version 1.42 272 ------------ 273 Fix slow oplock break when mounted to different servers at the same time and 274 the tids match and we try to find matching fid on wrong server. Fix read 275 looping when signing required by server (2.6.16 kernel only). Fix readdir 276 vs. rename race which could cause each to hang. Return . and .. even 277 if server does not. Allow searches to skip first three entries and 278 begin at any location. Fix oops in find_writeable_file. 279 280 Version 1.41 281 ------------ 282 Fix NTLMv2 security (can be enabled in /proc/fs/cifs) so customers can 283 configure stronger authentication. Fix sfu symlinks so they can 284 be followed (not just recognized). Fix wraparound of bcc on 285 read responses when buffer size over 64K and also fix wrap of 286 max smb buffer size when CIFSMaxBufSize over 64K. Fix oops in 287 cifs_user_read and cifs_readpages (when EAGAIN on send of smb 288 on socket is returned over and over). Add POSIX (advisory) byte range 289 locking support (requires server with newest CIFS UNIX Extensions 290 to the protocol implemented). Slow down negprot slightly in port 139 291 RFC1001 case to give session_init time on buggy servers. 292 293 Version 1.40 294 ------------ 295 Use fsuid (fsgid) more consistently instead of uid (gid). Improve performance 296 of readpages by eliminating one extra memcpy. Allow update of file size 297 from remote server even if file is open for write as long as mount is 298 directio. Recognize share mode security and send NTLM encrypted password 299 on tree connect if share mode negotiated. 300 301 Version 1.39 302 ------------ 303 Defer close of a file handle slightly if pending writes depend on that handle 304 (this reduces the EBADF bad file handle errors that can be logged under heavy 305 stress on writes). Modify cifs Kconfig options to expose CONFIG_CIFS_STATS2 306 Fix SFU style symlinks and mknod needed for servers which do not support the 307 CIFS Unix Extensions. Fix setfacl/getfacl on bigendian. Timeout negative 308 dentries so files that the client sees as deleted but that later get created 309 on the server will be recognized. Add client side permission check on setattr. 310 Timeout stuck requests better (where server has never responded or sent corrupt 311 responses) 312 313 Version 1.38 314 ------------ 315 Fix tcp socket retransmission timeouts (e.g. on ENOSPACE from the socket) 316 to be smaller at first (but increasing) so large write performance performance 317 over GigE is better. Do not hang thread on illegal byte range lock response 318 from Windows (Windows can send an RFC1001 size which does not match smb size) by 319 allowing an SMBs TCP length to be up to a few bytes longer than it should be. 320 wsize and rsize can now be larger than negotiated buffer size if server 321 supports large readx/writex, even when directio mount flag not specified. 322 Write size will in many cases now be 16K instead of 4K which greatly helps 323 file copy performance on lightly loaded networks. Fix oops in dnotify 324 when experimental config flag enabled. Make cifsFYI more granular. 325 326 Version 1.37 327 ------------ 328 Fix readdir caching when unlink removes file in current search buffer, 329 and this is followed by a rewind search to just before the deleted entry. 330 Do not attempt to set ctime unless atime and/or mtime change requested 331 (most servers throw it away anyway). Fix length check of received smbs 332 to be more accurate. Fix big endian problem with mapchars mount option, 333 and with a field returned by statfs. 334 335 Version 1.36 336 ------------ 337 Add support for mounting to older pre-CIFS servers such as Windows9x and ME. 338 For these older servers, add option for passing netbios name of server in 339 on mount (servernetbiosname). Add suspend support for power management, to 340 avoid cifsd thread preventing software suspend from working. 341 Add mount option for disabling the default behavior of sending byte range lock 342 requests to the server (necessary for certain applications which break with 343 mandatory lock behavior such as Evolution), and also mount option for 344 requesting case insensitive matching for path based requests (requesting 345 case sensitive is the default). 346 347 Version 1.35 348 ------------ 349 Add writepage performance improvements. Fix path name conversions 350 for long filenames on mounts which were done with "mapchars" mount option 351 specified. Ensure multiplex ids do not collide. Fix case in which 352 rmmod can oops if done soon after last unmount. Fix truncated 353 search (readdir) output when resume filename was a long filename. 354 Fix filename conversion when mapchars mount option was specified and 355 filename was a long filename. 356 357 Version 1.34 358 ------------ 359 Fix error mapping of the TOO_MANY_LINKS (hardlinks) case. 360 Do not oops if root user kills cifs oplock kernel thread or 361 kills the cifsd thread (NB: killing the cifs kernel threads is not 362 recommended, unmount and rmmod cifs will kill them when they are 363 no longer needed). Fix readdir to ASCII servers (ie older servers 364 which do not support Unicode) and also require asterisk. 365 Fix out of memory case in which data could be written one page 366 off in the page cache. 367 368 Version 1.33 369 ------------ 370 Fix caching problem, in which readdir of directory containing a file 371 which was cached could cause the file's time stamp to be updated 372 without invalidating the readahead data (so we could get stale 373 file data on the client for that file even as the server copy changed). 374 Cleanup response processing so cifsd can not loop when abnormally 375 terminated. 376 377 378 Version 1.32 379 ------------ 380 Fix oops in ls when Transact2 FindFirst (or FindNext) returns more than one 381 transact response for an SMB request and search entry split across two frames. 382 Add support for lsattr (getting ext2/ext3/reiserfs attr flags from the server) 383 as new protocol extensions. Do not send Get/Set calls for POSIX ACLs 384 unless server explicitly claims to support them in CIFS Unix extensions 385 POSIX ACL capability bit. Fix packet signing when multiuser mounting with 386 different users from the same client to the same server. Fix oops in 387 cifs_close. Add mount option for remapping reserved characters in 388 filenames (also allow recognizing files with created by SFU which have any 389 of these seven reserved characters, except backslash, to be recognized). 390 Fix invalid transact2 message (we were sometimes trying to interpret 391 oplock breaks as SMB responses). Add ioctl for checking that the 392 current uid matches the uid of the mounter (needed by umount.cifs). 393 Reduce the number of large buffer allocations in cifs response processing 394 (significantly reduces memory pressure under heavy stress with multiple 395 processes accessing the same server at the same time). 396 397 Version 1.31 398 ------------ 399 Fix updates of DOS attributes and time fields so that files on NT4 servers 400 do not get marked delete on close. Display sizes of cifs buffer pools in 401 cifs stats. Fix oops in unmount when cifsd thread being killed by 402 shutdown. Add generic readv/writev and aio support. Report inode numbers 403 consistently in readdir and lookup (when serverino mount option is 404 specified use the inode number that the server reports - for both lookup 405 and readdir, otherwise by default the locally generated inode number is used 406 for inodes created in either path since servers are not always able to 407 provide unique inode numbers when exporting multiple volumes from under one 408 sharename). 409 410 Version 1.30 411 ------------ 412 Allow new nouser_xattr mount parm to disable xattr support for user namespace. 413 Do not flag user_xattr mount parm in dmesg. Retry failures setting file time 414 (mostly affects NT4 servers) by retry with handle based network operation. 415 Add new POSIX Query FS Info for returning statfs info more accurately. 416 Handle passwords with multiple commas in them. 417 418 Version 1.29 419 ------------ 420 Fix default mode in sysfs of cifs module parms. Remove old readdir routine. 421 Fix capabilities flags for large readx so as to allow reads larger than 64K. 422 423 Version 1.28 424 ------------ 425 Add module init parm for large SMB buffer size (to allow it to be changed 426 from its default of 16K) which is especially useful for large file copy 427 when mounting with the directio mount option. Fix oops after 428 returning from mount when experimental ExtendedSecurity enabled and 429 SpnegoNegotiated returning invalid error. Fix case to retry better when 430 peek returns from 1 to 3 bytes on socket which should have more data. 431 Fixed path based calls (such as cifs lookup) to handle path names 432 longer than 530 (now can handle PATH_MAX). Fix pass through authentication 433 from Samba server to DC (Samba required dummy LM password). 434 435 Version 1.27 436 ------------ 437 Turn off DNOTIFY (directory change notification support) by default 438 (unless built with the experimental flag) to fix hang with KDE 439 file browser. Fix DNOTIFY flag mappings. Fix hang (in wait_event 440 waiting on an SMB response) in SendReceive when session dies but 441 reconnects quickly from another task. Add module init parms for 442 minimum number of large and small network buffers in the buffer pools, 443 and for the maximum number of simultaneous requests. 444 445 Version 1.26 446 ------------ 447 Add setfacl support to allow setting of ACLs remotely to Samba 3.10 and later 448 and other POSIX CIFS compliant servers. Fix error mapping for getfacl 449 to EOPNOTSUPP when server does not support posix acls on the wire. Fix 450 improperly zeroed buffer in CIFS Unix extensions set times call. 451 452 Version 1.25 453 ------------ 454 Fix internationalization problem in cifs readdir with filenames that map to 455 longer UTF-8 strings than the string on the wire was in Unicode. Add workaround 456 for readdir to netapp servers. Fix search rewind (seek into readdir to return 457 non-consecutive entries). Do not do readdir when server negotiates 458 buffer size to small to fit filename. Add support for reading POSIX ACLs from 459 the server (add also acl and noacl mount options). 460 461 Version 1.24 462 ------------ 463 Optionally allow using server side inode numbers, rather than client generated 464 ones by specifying mount option "serverino" - this is required for some apps 465 to work which double check hardlinked files and have persistent inode numbers. 466 467 Version 1.23 468 ------------ 469 Multiple bigendian fixes. On little endian systems (for reconnect after 470 network failure) fix tcp session reconnect code so we do not try first 471 to reconnect on reverse of port 445. Treat reparse points (NTFS junctions) 472 as directories rather than symlinks because we can do follow link on them. 473 474 Version 1.22 475 ------------ 476 Add config option to enable XATTR (extended attribute) support, mapping 477 xattr names in the "user." namespace space to SMB/CIFS EAs. Lots of 478 minor fixes pointed out by the Stanford SWAT checker (mostly missing 479 or out of order NULL pointer checks in little used error paths). 480 481 Version 1.21 482 ------------ 483 Add new mount parm to control whether mode check (generic_permission) is done 484 on the client. If Unix extensions are enabled and the uids on the client 485 and server do not match, client permission checks are meaningless on 486 server uids that do not exist on the client (this does not affect the 487 normal ACL check which occurs on the server). Fix default uid 488 on mknod to match create and mkdir. Add optional mount parm to allow 489 override of the default uid behavior (in which the server sets the uid 490 and gid of newly created files). Normally for network filesystem mounts 491 user want the server to set the uid/gid on newly created files (rather than 492 using uid of the client processes you would in a local filesystem). 493 494 Version 1.20 495 ------------ 496 Make transaction counts more consistent. Merge /proc/fs/cifs/SimultaneousOps 497 info into /proc/fs/cifs/DebugData. Fix oops in rare oops in readdir 498 (in build_wildcard_path_from_dentry). Fix mknod to pass type field 499 (block/char/fifo) properly. Remove spurious mount warning log entry when 500 credentials passed as mount argument. Set major/minor device number in 501 inode for block and char devices when unix extensions enabled. 502 503 Version 1.19 504 ------------ 505 Fix /proc/fs/cifs/Stats and DebugData display to handle larger 506 amounts of return data. Properly limit requests to MAX_REQ (50 507 is the usual maximum active multiplex SMB/CIFS requests per server). 508 Do not kill cifsd (and thus hurt the other SMB session) when more than one 509 session to the same server (but with different userids) exists and one 510 of the two user's smb sessions is being removed while leaving the other. 511 Do not loop reconnecting in cifsd demultiplex thread when admin 512 kills the thread without going through unmount. 513 514 Version 1.18 515 ------------ 516 Do not rename hardlinked files (since that should be a noop). Flush 517 cached write behind data when reopening a file after session abend, 518 except when already in write. Grab per socket sem during reconnect 519 to avoid oops in sendmsg if overlapping with reconnect. Do not 520 reset cached inode file size on readdir for files open for write on 521 client. 522 523 524 Version 1.17 525 ------------ 526 Update number of blocks in file so du command is happier (in Linux a fake 527 blocksize of 512 is required for calculating number of blocks in inode). 528 Fix prepare write of partial pages to read in data from server if possible. 529 Fix race on tcpStatus field between unmount and reconnection code, causing 530 cifsd process sometimes to hang around forever. Improve out of memory 531 checks in cifs_filldir 532 533 Version 1.16 534 ------------ 535 Fix incorrect file size in file handle based setattr on big endian hardware. 536 Fix oops in build_path_from_dentry when out of memory. Add checks for invalid 537 and closing file structs in writepage/partialpagewrite. Add statistics 538 for each mounted share (new menuconfig option). Fix endianness problem in 539 volume information displayed in /proc/fs/cifs/DebugData (only affects 540 affects big endian architectures). Prevent renames while constructing 541 path names for open, mkdir and rmdir. 542 543 Version 1.15 544 ------------ 545 Change to mempools for alloc smb request buffers and multiplex structs 546 to better handle low memory problems (and potential deadlocks). 547 548 Version 1.14 549 ------------ 550 Fix incomplete listings of large directories on Samba servers when Unix 551 extensions enabled. Fix oops when smb_buffer can not be allocated. Fix 552 rename deadlock when writing out dirty pages at same time. 553 554 Version 1.13 555 ------------ 556 Fix open of files in which O_CREATE can cause the mode to change in 557 some cases. Fix case in which retry of write overlaps file close. 558 Fix PPC64 build error. Reduce excessive stack usage in smb password 559 hashing. Fix overwrite of Linux user's view of file mode to Windows servers. 560 561 Version 1.12 562 ------------ 563 Fixes for large file copy, signal handling, socket retry, buffer 564 allocation and low memory situations. 565 566 Version 1.11 567 ------------ 568 Better port 139 support to Windows servers (RFC1001/RFC1002 Session_Initialize) 569 also now allowing support for specifying client netbiosname. NT4 support added. 570 571 Version 1.10 572 ------------ 573 Fix reconnection (and certain failed mounts) to properly wake up the 574 blocked users thread so it does not seem hung (in some cases was blocked 575 until the cifs receive timeout expired). Fix spurious error logging 576 to kernel log when application with open network files killed. 577 578 Version 1.09 579 ------------ 580 Fix /proc/fs module unload warning message (that could be logged 581 to the kernel log). Fix intermittent failure in connectathon 582 test7 (hardlink count not immediately refreshed in case in which 583 inode metadata can be incorrectly kept cached when time near zero) 584 585 Version 1.08 586 ------------ 587 Allow file_mode and dir_mode (specified at mount time) to be enforced 588 locally (the server already enforced its own ACLs too) for servers 589 that do not report the correct mode (do not support the 590 CIFS Unix Extensions). 591 592 Version 1.07 593 ------------ 594 Fix some small memory leaks in some unmount error paths. Fix major leak 595 of cache pages in readpages causing multiple read oriented stress 596 testcases (including fsx, and even large file copy) to fail over time. 597 598 Version 1.06 599 ------------ 600 Send NTCreateX with ATTR_POSIX if Linux/Unix extensions negotiated with server. 601 This allows files that differ only in case and improves performance of file 602 creation and file open to such servers. Fix semaphore conflict which causes 603 slow delete of open file to Samba (which unfortunately can cause an oplock 604 break to self while vfs_unlink held i_sem) which can hang for 20 seconds. 605 606 Version 1.05 607 ------------ 608 fixes to cifs_readpages for fsx test case 609 610 Version 1.04 611 ------------ 612 Fix caching data integrity bug when extending file size especially when no 613 oplock on file. Fix spurious logging of valid already parsed mount options 614 that are parsed outside of the cifs vfs such as nosuid. 615 616 617 Version 1.03 618 ------------ 619 Connect to server when port number override not specified, and tcp port 620 unitialized. Reset search to restart at correct file when kernel routine 621 filldir returns error during large directory searches (readdir). 622 623 Version 1.02 624 ------------ 625 Fix caching problem when files opened by multiple clients in which 626 page cache could contain stale data, and write through did 627 not occur often enough while file was still open when read ahead 628 (read oplock) not allowed. Treat "sep=" when first mount option 629 as an override of comma as the default separator between mount 630 options. 631 632 Version 1.01 633 ------------ 634 Allow passwords longer than 16 bytes. Allow null password string. 635 636 Version 1.00 637 ------------ 638 Gracefully clean up failed mounts when attempting to mount to servers such as 639 Windows 98 that terminate tcp sessions during protocol negotiation. Handle 640 embedded commas in mount parsing of passwords. 641 642 Version 0.99 643 ------------ 644 Invalidate local inode cached pages on oplock break and when last file 645 instance is closed so that the client does not continue using stale local 646 copy rather than later modified server copy of file. Do not reconnect 647 when server drops the tcp session prematurely before negotiate 648 protocol response. Fix oops in reopen_file when dentry freed. Allow 649 the support for CIFS Unix Extensions to be disabled via proc interface. 650 651 Version 0.98 652 ------------ 653 Fix hang in commit_write during reconnection of open files under heavy load. 654 Fix unload_nls oops in a mount failure path. Serialize writes to same socket 655 which also fixes any possible races when cifs signatures are enabled in SMBs 656 being sent out of signature sequence number order. 657 658 Version 0.97 659 ------------ 660 Fix byte range locking bug (endian problem) causing bad offset and 661 length. 662 663 Version 0.96 664 ------------ 665 Fix oops (in send_sig) caused by CIFS unmount code trying to 666 wake up the demultiplex thread after it had exited. Do not log 667 error on harmless oplock release of closed handle. 668 669 Version 0.95 670 ------------ 671 Fix unsafe global variable usage and password hash failure on gcc 3.3.1 672 Fix problem reconnecting secondary mounts to same server after session 673 failure. Fix invalid dentry - race in mkdir when directory gets created 674 by another client between the lookup and mkdir. 675 676 Version 0.94 677 ------------ 678 Fix to list processing in reopen_files. Fix reconnection when server hung 679 but tcpip session still alive. Set proper timeout on socket read. 680 681 Version 0.93 682 ------------ 683 Add missing mount options including iocharset. SMP fixes in write and open. 684 Fix errors in reconnecting after TCP session failure. Fix module unloading 685 of default nls codepage 686 687 Version 0.92 688 ------------ 689 Active smb transactions should never go negative (fix double FreeXid). Fix 690 list processing in file routines. Check return code on kmalloc in open. 691 Fix spinlock usage for SMP. 692 693 Version 0.91 694 ------------ 695 Fix oops in reopen_files when invalid dentry. drop dentry on server rename 696 and on revalidate errors. Fix cases where pid is now tgid. Fix return code 697 on create hard link when server does not support them. 698 699 Version 0.90 700 ------------ 701 Fix scheduling while atomic error in getting inode info on newly created file. 702 Fix truncate of existing files opened with O_CREAT but not O_TRUNC set. 703 704 Version 0.89 705 ------------ 706 Fix oops on write to dead tcp session. Remove error log write for case when file open 707 O_CREAT but not O_EXCL 708 709 Version 0.88 710 ------------ 711 Fix non-POSIX behavior on rename of open file and delete of open file by taking 712 advantage of trans2 SetFileInfo rename facility if available on target server. 713 Retry on ENOSPC and EAGAIN socket errors. 714 715 Version 0.87 716 ------------ 717 Fix oops on big endian readdir. Set blksize to be even power of two (2**blkbits) to fix 718 allocation size miscalculation. After oplock token lost do not read through 719 cache. 720 721 Version 0.86 722 ------------ 723 Fix oops on empty file readahead. Fix for file size handling for locally cached files. 724 725 Version 0.85 726 ------------ 727 Fix oops in mkdir when server fails to return inode info. Fix oops in reopen_files 728 during auto reconnection to server after server recovered from failure. 729 730 Version 0.84 731 ------------ 732 Finish support for Linux 2.5 open/create changes, which removes the 733 redundant NTCreate/QPathInfo/close that was sent during file create. 734 Enable oplock by default. Enable packet signing by default (needed to 735 access many recent Windows servers) 736 737 Version 0.83 738 ------------ 739 Fix oops when mounting to long server names caused by inverted parms to kmalloc. 740 Fix MultiuserMount (/proc/fs/cifs configuration setting) so that when enabled 741 we will choose a cifs user session (smb uid) that better matches the local 742 uid if a) the mount uid does not match the current uid and b) we have another 743 session to the same server (ip address) for a different mount which 744 matches the current local uid. 745 746 Version 0.82 747 ------------ 748 Add support for mknod of block or character devices. Fix oplock 749 code (distributed caching) to properly send response to oplock 750 break from server. 751 752 Version 0.81 753 ------------ 754 Finish up CIFS packet digital signing for the default 755 NTLM security case. This should help Windows 2003 756 network interoperability since it is common for 757 packet signing to be required now. Fix statfs (stat -f) 758 which recently started returning errors due to 759 invalid value (-1 instead of 0) being set in the 760 struct kstatfs f_ffiles field. 761 762 Version 0.80 763 ----------- 764 Fix oops on stopping oplock thread when removing cifs when 765 built as module. 766 767 Version 0.79 768 ------------ 769 Fix mount options for ro (readonly), uid, gid and file and directory mode. 770 771 Version 0.78 772 ------------ 773 Fix errors displayed on failed mounts to be more understandable. 774 Fixed various incorrect or misleading smb to posix error code mappings. 775 776 Version 0.77 777 ------------ 778 Fix display of NTFS DFS junctions to display as symlinks. 779 They are the network equivalent. Fix oops in 780 cifs_partialpagewrite caused by missing spinlock protection 781 of openfile linked list. Allow writebehind caching errors to 782 be returned to the application at file close. 783 784 Version 0.76 785 ------------ 786 Clean up options displayed in /proc/mounts by show_options to 787 be more consistent with other filesystems. 788 789 Version 0.75 790 ------------ 791 Fix delete of readonly file to Windows servers. Reflect 792 presence or absence of read only dos attribute in mode 793 bits for servers that do not support CIFS Unix extensions. 794 Fix shortened results on readdir of large directories to 795 servers supporting CIFS Unix extensions (caused by 796 incorrect resume key). 797 798 Version 0.74 799 ------------ 800 Fix truncate bug (set file size) that could cause hangs e.g. running fsx 801 802 Version 0.73 803 ------------ 804 unload nls if mount fails. 805 806 Version 0.72 807 ------------ 808 Add resume key support to search (readdir) code to workaround 809 Windows bug. Add /proc/fs/cifs/LookupCacheEnable which 810 allows disabling caching of attribute information for 811 lookups. 812 813 Version 0.71 814 ------------ 815 Add more oplock handling (distributed caching code). Remove 816 dead code. Remove excessive stack space utilization from 817 symlink routines. 818 819 Version 0.70 820 ------------ 821 Fix oops in get dfs referral (triggered when null path sent in to 822 mount). Add support for overriding rsize at mount time. 823 824 Version 0.69 825 ------------ 826 Fix buffer overrun in readdir which caused intermittent kernel oopses. 827 Fix writepage code to release kmap on write data. Allow "-ip=" new 828 mount option to be passed in on parameter distinct from the first part 829 (server name portion of) the UNC name. Allow override of the 830 tcp port of the target server via new mount option "-port=" 831 832 Version 0.68 833 ------------ 834 Fix search handle leak on rewind. Fix setuid and gid so that they are 835 reflected in the local inode immediately. Cleanup of whitespace 836 to make 2.4 and 2.5 versions more consistent. 837 838 839 Version 0.67 840 ------------ 841 Fix signal sending so that captive thread (cifsd) exits on umount 842 (which was causing the warning in kmem_cache_free of the request buffers 843 at rmmod time). This had broken as a sideeffect of the recent global 844 kernel change to daemonize. Fix memory leak in readdir code which 845 showed up in "ls -R" (and applications that did search rewinding). 846 847 Version 0.66 848 ------------ 849 Reconnect tids and fids after session reconnection (still do not 850 reconnect byte range locks though). Fix problem caching 851 lookup information for directory inodes, improving performance, 852 especially in deep directory trees. Fix various build warnings. 853 854 Version 0.65 855 ------------ 856 Finish fixes to commit write for caching/readahead consistency. fsx 857 now works to Samba servers. Fix oops caused when readahead 858 was interrupted by a signal. 859 860 Version 0.64 861 ------------ 862 Fix data corruption (in partial page after truncate) that caused fsx to 863 fail to Windows servers. Cleaned up some extraneous error logging in 864 common error paths. Add generic sendfile support. 865 866 Version 0.63 867 ------------ 868 Fix memory leak in AllocMidQEntry. 869 Finish reconnection logic, so connection with server can be dropped 870 (or server rebooted) and the cifs client will reconnect. 871 872 Version 0.62 873 ------------ 874 Fix temporary socket leak when bad userid or password specified 875 (or other SMBSessSetup failure). Increase maximum buffer size to slightly 876 over 16K to allow negotiation of up to Samba and Windows server default read 877 sizes. Add support for readpages 878 879 Version 0.61 880 ------------ 881 Fix oops when username not passed in on mount. Extensive fixes and improvements 882 to error logging (strip redundant newlines, change debug macros to ensure newline 883 passed in and to be more consistent). Fix writepage wrong file handle problem, 884 a readonly file handle could be incorrectly used to attempt to write out 885 file updates through the page cache to multiply open files. This could cause 886 the iozone benchmark to fail on the fwrite test. Fix bug mounting two different 887 shares to the same Windows server when using different usernames 888 (doing this to Samba servers worked but Windows was rejecting it) - now it is 889 possible to use different userids when connecting to the same server from a 890 Linux client. Fix oops when treeDisconnect called during unmount on 891 previously freed socket. 892 893 Version 0.60 894 ------------ 895 Fix oops in readpages caused by not setting address space operations in inode in 896 rare code path. 897 898 Version 0.59 899 ------------ 900 Includes support for deleting of open files and renaming over existing files (per POSIX 901 requirement). Add readlink support for Windows junction points (directory symlinks). 902 903 Version 0.58 904 ------------ 905 Changed read and write to go through pagecache. Added additional address space operations. 906 Memory mapped operations now working. 907 908 Version 0.57 909 ------------ 910 Added writepage code for additional memory mapping support. Fixed leak in xids causing 911 the simultaneous operations counter (/proc/fs/cifs/SimultaneousOps) to increase on 912 every stat call. Additional formatting cleanup. 913 914 Version 0.56 915 ------------ 916 Fix bigendian bug in order of time conversion. Merge 2.5 to 2.4 version. Formatting cleanup. 917 918 Version 0.55 919 ------------ 920 Fixes from Zwane Mwaikambo for adding missing return code checking in a few places. 921 Also included a modified version of his fix to protect global list manipulation of 922 the smb session and tree connection and mid related global variables. 923 924 Version 0.54 925 ------------ 926 Fix problem with captive thread hanging around at unmount time. Adjust to 2.5.42-pre 927 changes to superblock layout. Remove wasteful allocation of smb buffers (now the send 928 buffer is reused for responses). Add more oplock handling. Additional minor cleanup. 929 930 Version 0.53 931 ------------ 932 More stylistic updates to better match kernel style. Add additional statistics 933 for filesystem which can be viewed via /proc/fs/cifs. Add more pieces of NTLMv2 934 and CIFS Packet Signing enablement. 935 936 Version 0.52 937 ------------ 938 Replace call to sleep_on with safer wait_on_event. 939 Make stylistic changes to better match kernel style recommendations. 940 Remove most typedef usage (except for the PDUs themselves). 941 942 Version 0.51 943 ------------ 944 Update mount so the -unc mount option is no longer required (the ip address can be specified 945 in a UNC style device name. Implementation of readpage/writepage started. 946 947 Version 0.50 948 ------------ 949 Fix intermittent problem with incorrect smb header checking on badly 950 fragmented tcp responses 951 952 Version 0.49 953 ------------ 954 Fixes to setting of allocation size and file size. 955 956 Version 0.48 957 ------------ 958 Various 2.5.38 fixes. Now works on 2.5.38 959 960 Version 0.47 961 ------------ 962 Prepare for 2.5 kernel merge. Remove ifdefs. 963 964 Version 0.46 965 ------------ 966 Socket buffer management fixes. Fix dual free. 967 968 Version 0.45 969 ------------ 970 Various big endian fixes for hardlinks and symlinks and also for dfs. 971 972 Version 0.44 973 ------------ 974 Various big endian fixes for servers with Unix extensions such as Samba 975 976 Version 0.43 977 ------------ 978 Various FindNext fixes for incorrect filenames on large directory searches on big endian 979 clients. basic posix file i/o tests now work on big endian machines, not just le 980 981 Version 0.42 982 ------------ 983 SessionSetup and NegotiateProtocol now work from Big Endian machines. 984 Various Big Endian fixes found during testing on the Linux on 390. Various fixes for compatibility with older 985 versions of 2.4 kernel (now builds and works again on kernels at least as early as 2.4.7). 986 987 Version 0.41 988 ------------ 989 Various minor fixes for Connectathon Posix "basic" file i/o test suite. Directory caching fixed so hardlinked 990 files now return the correct number of links on fstat as they are repeatedly linked and unlinked. 991 992 Version 0.40 993 ------------ 994 Implemented "Raw" (i.e. not encapsulated in SPNEGO) NTLMSSP (i.e. the Security Provider Interface used to negotiate 995 session advanced session authentication). Raw NTLMSSP is preferred by Windows 2000 Professional and Windows XP. 996 Began implementing support for SPNEGO encapsulation of NTLMSSP based session authentication blobs 997 (which is the mechanism preferred by Windows 2000 server in the absence of Kerberos). 998 999 Version 0.38 1000 ------------ 1001 Introduced optional mount helper utility mount.cifs and made coreq changes to cifs vfs to enable 1002 it. Fixed a few bugs in the DFS code (e.g. bcc two bytes too short and incorrect uid in PDU). 1003 1004 Version 0.37 1005 ------------ 1006 Rewrote much of connection and mount/unmount logic to handle bugs with 1007 multiple uses to same share, multiple users to same server etc. 1008 1009 Version 0.36 1010 ------------ 1011 Fixed major problem with dentry corruption (missing call to dput) 1012 1013 Version 0.35 1014 ------------ 1015 Rewrite of readdir code to fix bug. Various fixes for bigendian machines. 1016 Begin adding oplock support. Multiusermount and oplockEnabled flags added to /proc/fs/cifs 1017 although corresponding function not fully implemented in the vfs yet 1018 1019 Version 0.34 1020 ------------ 1021 Fixed dentry caching bug, misc. cleanup 1022 1023 Version 0.33 1024 ------------ 1025 Fixed 2.5 support to handle build and configure changes as well as misc. 2.5 changes. Now can build 1026 on current 2.5 beta version (2.5.24) of the Linux kernel as well as on 2.4 Linux kernels. 1027 Support for STATUS codes (newer 32 bit NT error codes) added. DFS support begun to be added. 1028 1029 Version 0.32 1030 ------------ 1031 Unix extensions (symlink, readlink, hardlink, chmod and some chgrp and chown) implemented 1032 and tested against Samba 2.2.5 1033 1034 1035 Version 0.31 1036 ------------ 1037 1) Fixed lockrange to be correct (it was one byte too short) 1038 1039 2) Fixed GETLK (i.e. the fcntl call to test a range of bytes in a file to see if locked) to correctly 1040 show range as locked when there is a conflict with an existing lock. 1041 1042 3) default file perms are now 2767 (indicating support for mandatory locks) instead of 777 for directories 1043 in most cases. Eventually will offer optional ability to query server for the correct perms. 1044 1045 3) Fixed eventual trap when mounting twice to different shares on the same server when the first succeeded 1046 but the second one was invalid and failed (the second one was incorrectly disconnecting the tcp and smb 1047 session) 1048 1049 4) Fixed error logging of valid mount options 1050 1051 5) Removed logging of password field. 1052 1053 6) Moved negotiate, treeDisconnect and uloggoffX (only tConx and SessSetup remain in connect.c) to cifssmb.c 1054 and cleaned them up and made them more consistent with other cifs functions. 1055 1056 7) Server support for Unix extensions is now fully detected and FindFirst is implemented both ways 1057 (with or without Unix extensions) but FindNext and QueryPathInfo with the Unix extensions are not completed, 1058 nor is the symlink support using the Unix extensions 1059 1060 8) Started adding the readlink and follow_link code 1061 1062 Version 0.3 1063 ----------- 1064 Initial drop