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path: root/fs/cifs/cifsglob.h
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2009-05-06[CIFS] Allow raw ntlmssp code to be enabled with sec=ntlmsspSteve French
On mount, "sec=ntlmssp" can now be specified to allow "rawntlmssp" security to be enabled during CIFS session establishment/authentication (ntlmssp used to require specifying krb5 which was counterintuitive). Signed-off-by: Steve French <sfrench@us.ibm.com>
2009-04-17[CIFS] Add support for posix open during lookupSteve French
This patch by utilizing lookup intents, and thus removing a network roundtrip in the open path, improves performance dramatically on open (30% or more) to Samba and other servers which support the cifs posix extensions Signed-off-by: Shirish Pargaonkar <shirishp@us.ibm.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
2009-04-17cifs: vary timeout on writes past EOF based on offset (try #5)Jeff Layton
This is the fourth version of this patch: The first three generated a compiler warning asking for explicit curly braces. The first two didn't handle update the size correctly when writes that didn't start at the eof were done. The first patch also didn't update the size correctly when it explicitly set via truncate(). This patch adds code to track the client's current understanding of the size of the file on the server separate from the i_size, and then to use this info to semi-intelligently set the timeout for writes past the EOF. This helps prevent timeouts when trying to write large, sparse files on windows servers. Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
2009-03-12[CIFS] work around bug in Samba server handling for posix openSteve French
Samba server (version 3.3.1 and earlier, and 3.2.8 and earlier) incorrectly required the O_CREAT flag on posix open (even when a file was not being created). This disables posix open (create is still ok) after the first attempt returns EINVAL (and logs an error, once, recommending that they update their server). Acked-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
2009-03-12[CIFS] Send SMB flush in cifs_fsyncSteve French
In contrast to the now-obsolete smbfs, cifs does not send SMB_COM_FLUSH in response to an explicit fsync(2) to guarantee that all volatile data is written to stable storage on the server side, provided the server honors the request (which, to my knowledge, is true for Windows and Samba with 'strict sync' enabled). This patch modifies the cifs_fsync implementation to restore the fsync-behavior of smbfs by triggering SMB_COM_FLUSH after sending outstanding data on the client side to the server. Signed-off-by: Horst Reiterer <horst.reiterer@gmail.com> Acked-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
2009-02-21[CIFS] Fix multiuser mounts so server does not invalidate earlier security ↵Steve French
contexts When two different users mount the same Windows 2003 Server share using CIFS, the first session mounted can be invalidated. Some servers invalidate the first smb session when a second similar user (e.g. two users who get mapped by server to "guest") authenticates an smb session from the same client. By making sure that we set the 2nd and subsequent vc numbers to nonzero values, this ensures that we will not have this problem. Fixes Samba bug 6004, problem description follows: How to reproduce: - configure an "open share" (full permissions to Guest user) on Windows 2003 Server (I couldn't reproduce the problem with Samba server or Windows older than 2003) - mount the share twice with different users who will be authenticated as guest. noacl,noperm,user=john,dir_mode=0700,domain=DOMAIN,rw noacl,noperm,user=jeff,dir_mode=0700,domain=DOMAIN,rw Result: - just the mount point mounted last is accessible: Signed-off-by: Steve French <sfrench@us.ibm.com>
2008-12-26cifs: store password in tconJeff Layton
cifs: store password in tcon Each tcon has its own password for share-level security. Store it in the tcon and wipe it clean and free it when freeing the tcon. When doing the tree connect with share-level security, use the tcon password instead of the session password. Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
2008-12-26cifs: account for IPv6 in ses->serverName and clean up netbios name handlingJeff Layton
The current code for setting the session serverName is IPv4-specific. Allow it to be an IPv6 address as well. Use NIP* macros to set the format. This also entails increasing the length of the serverName field, so declare a new macro for RFC1001 name length and use it in the appropriate places. Finally, drop the unicode_server_Name field from TCP_Server_Info since it's not used. We can add it back later if needed, but for now it just wastes memory. Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
2008-12-26cifs: convert tcpSem to a mutexJeff Layton
Mutexes are preferred for single-holder semaphores... Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
2008-12-26cifs: remove unused SMB session pointer from struct mid_q_entryJeff Layton
Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
2008-11-20[CIFS] Do not attempt to close invalidated file handlesSteve French
If a connection with open file handles has gone down and come back up and reconnected without reopening the file handle yet, do not attempt to send an SMB close request for this handle in cifs_close. We were checking for the connection being invalid in cifs_close but since the connection may have been reconnected we also need to check whether the file handle was marked invalid (otherwise we could close the wrong file handle by accident). Acked-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
2008-11-17cifs: reinstate sharing of tree connectionsJeff Layton
Use a similar approach to the SMB session sharing. Add a list of tcons attached to each SMB session. Move the refcount to non-atomic. Protect all of the above with the cifs_tcp_ses_lock. Add functions to properly find and put references to the tcons. Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
2008-11-14cifs: reinstate sharing of SMB sessions sans racesJeff Layton
We do this by abandoning the global list of SMB sessions and instead moving to a per-server list. This entails adding a new list head to the TCP_Server_Info struct. The refcounting for the cifsSesInfo is moved to a non-atomic variable. We have to protect it by a lock anyway, so there's no benefit to making it an atomic. The list and refcount are protected by the global cifs_tcp_ses_lock. The patch also adds a new routines to find and put SMB sessions and that properly take and put references under the lock. Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
2008-11-14cifs: disable sharing session and tcon and add new TCP sharing codeJeff Layton
The code that allows these structs to be shared is extremely racy. Disable the sharing of SMB and tcon structs for now until we can come up with a way to do this that's race free. We want to continue to share TCP sessions, however since they are required for multiuser mounts. For that, implement a new (hopefully race-free) scheme. Add a new global list of TCP sessions, and take care to get a reference to it whenever we're dealing with one. Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
2008-11-14[CIFS] clean up server protocol handlingSteve French
We're currently declaring both a sockaddr_in and sockaddr6_in on the stack, but we really only need storage for one of them. Declare a sockaddr struct and cast it to the proper type. Also, eliminate the protocolType field in the TCP_Server_Info struct. It's redundant since we have a sa_family field in the sockaddr anyway. We may need to revisit this if SCTP is ever implemented, but for now this will simplify the code. CIFS over IPv6 also has a number of problems currently. This fixes all of them that I found. Eventually, it would be nice to move more of the code to be protocol independent, but this is a start. Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
2008-11-13[CIFS] remove unused list, add new cifs sock list to prepare for ↵Steve French
mount/umount fix Also adds two lines missing from the previous patch (for the need reconnect flag in the /proc/fs/cifs/DebugData handling) The new global_cifs_sock_list is added, and initialized in init_cifs but not used yet. Jeff Layton will be adding code in to use that and to remove the GlobalTcon and GlobalSMBSession lists. CC: Jeff Layton <jlayton@redhat.com> CC: Shirish Pargaonkar <shirishp@us.ibm.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
2008-11-13[CIFS] Fix cifs reconnection flagsSteve French
In preparation for Jeff's big umount/mount fixes to remove the possibility of various races in cifs mount and linked list handling of sessions, sockets and tree connections, this patch cleans up some repetitive code in cifs_mount, and addresses a problem with ses->status and tcon->tidStatus in which we were overloading the "need_reconnect" state with other status in that field. So the "need_reconnect" flag has been broken out from those two state fields (need reconnect was not mutually exclusive from some of the other possible tid and ses states). In addition, a few exit cases in cifs_mount were cleaned up, and a problem with a tcon flag (for lease support) was not being set consistently for the 2nd mount of the same share CC: Jeff Layton <jlayton@redhat.com> CC: Shirish Pargaonkar <shirishp@us.ibm.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
2008-10-29[CIFS] Reduce number of socket retries in large write pathSteve French
CIFS in some heavy stress conditions cifs could get EAGAIN repeatedly in smb_send2 which led to repeated retries and eventually failure of large writes which could lead to data corruption. There are three changes that were suggested by various network developers: 1) convert cifs from non-blocking to blocking tcp sendmsg (we left in the retry on failure) 2) change cifs to not set sendbuf and rcvbuf size for the socket (let tcp autotune the buffer sizes since that works much better in the TCP stack now) 3) if we have a partial frame sent in smb_send2, mark the tcp session as invalid (close the socket and reconnect) so we do not corrupt the remaining part of the SMB with the beginning of the next SMB. This does not appear to hurt performance measurably and has been run in various scenarios, but it definately removes a corruption that we were seeing in some high stress test cases. Acked-by: Shirish Pargaonkar <shirishp@us.ibm.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
2008-10-23[CIFS] improve setlease handlingSteve French
fcntl(F_SETLEASE) currently is not exported by cifs (nor by local file systems) so cifs grants leases based on how other local processes have opened the file not by whether the file is cacheable (oplocked). This adds the check to make sure that the file is cacheable on the client before checking whether we can grant the lease locally (generic_setlease). It also adds a mount option for cifs (locallease) if the user wants to override this and try to grant leases even if the server did not grant oplock. Signed-off-by: Steve French <sfrench@us.ibm.com>
2008-10-20cifs: track DeletePending flag in cifsInodeInfoJeff Layton
cifs: track DeletePending flag in cifsInodeInfo The QPathInfo call returns a flag that indicates whether DELETE_ON_CLOSE is set. Track it in the cifsInodeInfo. Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
2008-10-07[CIFS] make sure we have the right resume info before calling CIFSFindNextSteve French
When we do a seekdir() or equivalent, we usually end up doing a FindFirst call and then call FindNext until we get to the offset that we want. The problem is that when we call FindNext, the code usually doesn't have the proper info (mostly, the filename of the entry from the last search) to resume the search. Add a "last_entry" field to the cifs_search_info that points to the last entry in the search. We calculate this pointer by using the LastNameOffset field from the search parms that are returned. We then use that info to do a cifs_save_resume_key before we call CIFSFindNext. This patch allows CIFS to reliably pass the "telldir" connectathon test. Signed-off-by: Jeff Layton <jlayton@redhat.com> CC: Stable <stable@kernel.org> Signed-off-by: Steve French <sfrench@us.ibm.com>
2008-08-19[CIFS] distinguish between Kerberos and MSKerberos in upcallSteve French
Properly handle MSKRB5 by passing sec=mskrb5 to the upcall so that the spengo blob can be generated appropriately. Also, make decode_negTokenInit prefer whichever mechanism is first in the list. Needed for some NetApp servers, and possibly some older versions of Windows which treat the two KRB5 mechanisms differently. Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
2008-07-24[CIFS] Fix warnings from checkpatchShirish Pargaonkar
Signed-off-by: Steve French <sfrench@us.ibm.com>
2008-05-23[CIFS] remove unused variablesSteve French
CC: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
2008-05-15[CIFS] enable parsing for transport encryption mount parmSteve French
Samba now supports transport encryption on particular exports (mounted tree ids can be encrypted for servers which support the unix extensions). This adds parsing support to cifs mount option parsing for this. Signed-off-by: Steve French <sfrench@us.ibm.com>
2008-04-29[CIFS] convert usage of implicit booleans to boolSteve French
Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
2008-02-15[CIFS] Fix mixed case name in structure dfs_info3_paramIgor Mammedov
Signed-off-by: Igor Mammedov <niallain@gmail.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
2008-01-25[CIFS] DFS build fixesSteve French
Also includes a few minor changes suggested by Christoph Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-11-16[CIFS] Have CIFS_SessSetup build correct SPNEGO SessionSetup requestSteve French
Have CIFS_SessSetup call cifs_get_spnego_key when Kerberos is negotiated. Use the info in the key payload to build a session setup request packet. Also clean up how the request buffer in the function is freed on error. With appropriate user space helper (in samba/source/client). Kerberos support (secure session establishment can be done now via Kerberos, previously users would have to use NTLMv2 instead for more secure session setup). Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-11-16[CIFS] add hostname field to TCP_Server_Info structJeff Layton
...and populate it with the hostname portion of the UNC string. Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-11-13[CIFS] Fix buffer overflow if server sends corrupt response to smallSteve French
request In SendReceive() function in transport.c - it memcpy's message payload into a buffer passed via out_buf param. The function assumes that all buffers are of size (CIFSMaxBufSize + MAX_CIFS_HDR_SIZE) , unfortunately it is also called with smaller (MAX_CIFS_SMALL_BUFFER_SIZE) buffers. There are eight callers (SMB worker functions) which are primarily affected by this change: TreeDisconnect, uLogoff, Close, findClose, SetFileSize, SetFileTimes, Lock and PosixLock CC: Dave Kleikamp <shaggy@austin.ibm.com> CC: Przemyslaw Wegrzyn <czajnik@czajsoft.pl> Acked-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-10-16[CIFS] missing #endif from a previous patchSteve French
Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-10-16[CIFS] Break up unicode_sessetup string functionsJeff Layton
SPNEGO setup needs only some of these strings. Break up unicode_ssetup_strings so we can call them individually. Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-10-12[CIFS] fix build break when lanman not enabledSteve French
Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-10-04[CIFS] Fix cifsd so shuts down when signing fails during mountSteve French
Fixes two problems: 1) we dropped down to negotiating lanman if we did not recognize the mechanism (krb5 e.g.) 2) we did not stop cifsd (thus will fail when doing rmod cifs with slab free errors) when we fail tcon but have a bad session (which is the case in which signing is required but we don't allow signing on the client) It also turns on extended security flag in the header when passing "sec=krb5" on mount command (although kerberos support is not done of course) Acked-by: Jeff Layton <jlayton@redhat.com> CC: Shaggy <shaggy@us.ibm.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-09-29[CIFS] named pipe support (part 2)Steve French
Also fixes typo which could cause build break Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-09-28[CIFS] CIFS support for named pipes (part 1)Steve French
This allows cifs to mount to ipc shares (IPC$) which will allow user space applications to layer over authenticated cifs connections (useful for Wine and others that would want to put DCE/RPC over CIFS or run CIFS named pipes) Acked-by: Rob Shearman <rob@codeweavers.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-09-24[CIFS] Support for CIFS ACLs (part 1)Steve French
Add code to be able to dump CIFS ACL information when Query Posix ACL with cifsacl mount parm enabled. Signed-off-by: Shirish Pargoankar <shirishp@us.ibm.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-07-18[CIFS] Allow disabling CIFS Unix Extensions as mount optionSteve French
Previously the only way to do this was to umount all mounts to that server, turn off a proc setting (/proc/fs/cifs/LinuxExtensionsEnabled). Fixes Samba bugzilla bug number: 4582 (and also 2008) Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-07-09[CIFS] Fix packet signatures for NTLMv2 caseSteve French
Signed-off-by: Yehuda Sadeh Weinraub <Yehuda.Sadeh@expand.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-06-28[CIFS] whitespace fixesSteve French
This changeset brought to you ... by patchcheck.pl Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-05-03[CIFS] Change semaphore to mutex for cifs lock_semRoland Dreier
Originally at http://lkml.org/lkml/2006/9/2/86 The recent change to "allow Windows blocking locks to be cancelled via a CANCEL_LOCK call" introduced a new semaphore in struct cifsFileInfo, lock_sem. However, semaphores used as mutexes are deprecated these days, and there's no reason to add a new one to the kernel. Therefore, convert lock_sem to a struct mutex (and also fix one indentation glitch on one of the lines changed anyway). Signed-off-by: Roland Dreier <roland@digitalvampire.org> Signed-off-by: Jan Engelhardt <jengelh@gmx.de> Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-02-27[CIFS] Remove some unused functions/declarationsSteve French
Signed-off-by: Steve French <sfrench@us.ibm.com>
2006-09-30[CIFS] Make use of newer QFSInfo dependent on capability bit instead ofSteve French
whether we negotiated legacy lanman dialect so we do not keep retrying for mount to WindowsME Signed-off-by: Steve French <sfrench@us.ibm.com>
2006-09-30[CIFS] Do not send newer QFSInfo to legacy servers which can not support itSteve French
Fix dialect negotiation to save off when we have negotiated lanman. This allows us to avoid sending some somewhat newer requests that the server can not handle and go directly to the older version (infolevel) of the same call. Make sure we try to negotiate a level which allows us to get the server OS (which we check so we can detect Win9x vs. other legacy servers and eventually work around the Win9x DOS time bug (they reverse date/time fields). Signed-off-by: Steve French <sfrench@us.ibm.com>
2006-09-30[CIFS] Rename server time zone fieldSteve French
Server time zone is not really a time zone, rather a time adjustement in seconds. CC: Guenter Kukkukk <linux@kukkukk.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
2006-09-28[CIFS] Remove static and unused symbolsSteve French
Most cases of the ones found by Shaggy by "make namespacecheck" could be removed or made static Ack: Dave Kleikamp <shaggy@austin.ibm.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
2006-08-11[CIFS]Jeremy Allison
Allow Windows blocking locks to be cancelled via a CANCEL_LOCK call. TODO - restrict this to servers that support NT_STATUS codes (Win9x will probably not support this call). Signed-off-by: Jeremy Allison <jra@samba.org> Signed-off-by: Steve French <sfrench@us.ibm.com> (cherry picked from 570d4d2d895569825d0d017d4e76b51138f68864 commit)
2006-08-11[CIFS] Do not time out posix brl requests when using new posix setfileinfoSteve French
request and do not time out slow requests to a server that is still responding well to other threads Suggested by jra of Samba team Signed-off-by: Steve French <sfrench@us.ibm.com> (cherry picked from 89b57148115479eef074b8d3f86c4c86c96ac969 commit)
2006-06-27[CIFS] Fix allocation of buffers for new session setup routine to allowSteve French
longer user and domain names and allow passing sec options on mount Signed-off-by: Steve French <sfrench@us.ibm.com>