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* [CIFS] cifs: remove pointless lock and unlock of GlobalMid_Lock in ↵Jeff Layton2008-10-12
| | | | | | | | | | | header_assemble We lock GlobalMid_Lock in header_assemble and then immediately unlock it again without doing anything. Not sure what this was intended to do, but remove it. Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
* [CIFS] Check that last search entry resume key is validSteve French2008-10-08
| | | | | | | | Jeff's recent patch to add a last_entry field in the search structure to better construct resume keys did not validate that the server sent us a plausible pointer to the last entry. This adds that. Signed-off-by: Steve French <sfrench@us.ibm.com>
* [CIFS] make sure we have the right resume info before calling CIFSFindNextSteve French2008-10-07
| | | | | | | | | | | | | | | | | | | 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>
* [CIFS] clean up error handling in cifs_unlinkSteve French2008-10-07
| | | | | | | | | | | | | | | | | | Currently, if a standard delete fails and we end up getting -EACCES we try to clear ATTR_READONLY and try the delete again. If that then fails with -ETXTBSY then we try a rename_pending_delete. We aren't handling other errors appropriately though. Another client could have deleted the file in the meantime and we get back -ENOENT, for instance. In that case we wouldn't do a d_drop. Instead of retrying in a separate call, simply goto the original call and use the error handling from that. Also, we weren't properly undoing any attribute changes that were done before returning an error back to the caller. CC: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
* [CIFS] fix some settings of cifsAttrs after calling SetFileInfo and SetPathInfoJeff Layton2008-10-06
| | | | | | | | | We only need to set them when we call SetFileInfo or SetPathInfo directly, and as soon as possible after then. We had one place setting it where it didn't need to be, and another place where it was missing. Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
* cifs: explicitly revoke SPNEGO key after session setupJeff Layton2008-09-24
| | | | | | | | | | | | | | | | cifs: explicitly revoke SPNEGO key after session setup The SPNEGO blob returned by an upcall can only be used once. Explicitly revoke it to make sure that we never pick it up again after session setup exits. This doesn't seem to be that big an issue on more recent kernels, but older kernels seem to link keys into the session keyring by default. That said, explicitly revoking the key seems like a reasonable thing to do here. Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
* cifs: Convert cifs to new aops.Nick Piggin2008-09-24
| | | | | | | | | | | | | | | | | | | | | | | cifs: Convert cifs to new aops. This patch is based on the one originally posted by Nick Piggin. His patch was very close, but had a couple of small bugs. Nick's original comments follow: This is another relatively naive conversion. Always do the read upfront when the page is not uptodate (unless we're in the writethrough path). Fix an uninitialized data exposure where SetPageUptodate was called before the page was uptodate. SetPageUptodate and switch to writeback mode in the case that the full page was dirtied. Acked-by: Shaggy <shaggy@austin.ibm.com> Acked-by: Badari Pulavarty <pbadari@us.ibm.com> Signed-off-by: Nick Piggin <npiggin@suse.de> Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
* [CIFS] update DOS attributes in cifsInode if we successfully changed themSteve French2008-09-24
| | | | | Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
* cifs: remove NULL termination from rename target in CIFSSMBRenameOpenFIleJeff Layton2008-09-24
| | | | | | | | | | cifs: remove NULL termination from rename target in CIFSSMBRenameOpenFIle The rename destination isn't supposed to be null terminated. Also, change the name string arg to be const. Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
* cifs: work around samba returning -ENOENT on SetFileDisposition callJeff Layton2008-09-24
| | | | | | | | | | | | | | | | | | | cifs: work around samba returning -ENOENT on SetFileDisposition call Samba seems to return STATUS_OBJECT_NAME_NOT_FOUND when we try to set the delete on close bit after doing a rename by filehandle. This looks like a samba bug to me, but a lot of servers will do this. For now, pretend an -ENOENT return is a success. Samba does however seem to respect the CREATE_DELETE_ON_CLOSE bit when opening files that already exist. Windows will ignore it, but so adding it to the open flags should be harmless. We're also currently ignoring the return code on the rename by filehandle, so no need to set rc based on it. Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
* cifs: fix inverted NULL check after kmallocJeff Layton2008-09-24
| | | | | | | cifs: fix inverted NULL check after kmalloc Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
* [CIFS] clean up upcall handling for dns_resolver keysSteve French2008-09-23
| | | | | | | | | | | We're given the datalen in the downcall, so there's no need to do any calls to strlen(). Just keep track of the datalen in the key. Finally, add a sanity check of the data in the downcall to make sure that it looks like a real IP address. Signed-off-by: Jeff Layton <jlayton@redhat.com> Acked-by: David Howells <dhowells@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
* [CIFS] fix busy-file renames and refactor cifs_rename logicSteve French2008-09-23
| | | | | | | | | | | | | | | | | | | Break out the code that does the actual renaming into a separate function and have cifs_rename call that. That function will attempt a path based rename first and then do a filehandle based one if it looks like the source is busy. The existing logic tried a path based rename first, but if we needed to remove the destination then it only attempted a filehandle based rename afterward. Not all servers support renaming by filehandle, so we need to always attempt path rename first and fall back to filehandle rename if it doesn't work. This also fixes renames of open files on windows servers (at least when the source and destination directories are the same). CC: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
* cifs: add function to set file dispositionJeff Layton2008-09-23
| | | | | | | | | | | | cifs: add function to set file disposition The proper way to set the delete on close bit on an already existing file is to use SET_FILE_INFO with an infolevel of SMB_FILE_DISPOSITION_INFO. Add a function to do that and have the silly-rename code use it. Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
* [CIFS] add constants for string lengths of keynames in SPNEGO upcall stringSteve French2008-09-23
| | | | | Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
* cifs: move rename and delete-on-close logic into helper functionJeff Layton2008-09-23
| | | | | | | | | | | | | | | cifs: move rename and delete-on-close logic into helper function When a file is still open on the server, we attempt to set the DELETE_ON_CLOSE bit and rename it to a new filename. When the last opener closes the file, the server should delete it. This patch moves this mechanism into a helper function and has the two places in cifs_unlink that do this procedure call it. It also fixes the open flags to be correct. Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
* cifs: have find_writeable_file prefer filehandles opened by same taskJeff Layton2008-09-22
| | | | | | | | | | | | | | | | When the CIFS client goes to write out pages, it needs to pick a filehandle to write to. find_writeable_file however just picks the first filehandle that it finds. This can cause problems when a lock is issued against a particular filehandle and we pick a different filehandle to write to. This patch tries to avert this situation by having find_writable_file prefer filehandles that have a pid that matches the current task. This seems to fix lock test 11 from the connectathon test suite when run against a windows server. Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
* cifs: don't use GFP_KERNEL with GFP_NOFSPekka Enberg2008-09-22
| | | | | | | | | | GFP_KERNEL and GFP_NOFS are mutually exclusive. If you combine them, you end up with plain GFP_KERNEL which can deadlock in cases where you really want GFP_NOFS. Cc: Steve French <sfrench@samba.org> Signed-off-by: Pekka Enberg <penberg@cs.helsinki.fi> Signed-off-by: Steve French <sfrench@us.ibm.com>
* [CIFS] use common code for turning off ATTR_READONLY in cifs_unlinkSteve French2008-09-16
| | | | | | | | | | | We already have a cifs_set_file_info function that can flip DOS attribute bits. Have cifs_unlink call it to handle turning ATTR_HIDDEN on and ATTR_READONLY off when an unlink attempt returns -EACCES. This also removes a level of indentation from cifs_unlink. Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
* cifs: clean up variables in cifs_unlinkJeff Layton2008-09-16
| | | | | | | | | | | Change parameters to cifs_unlink to match the ones used in the generic VFS. Add some local variables to cut down on the amount of struct dereferencing that needs to be done, and eliminate some unneeded NULL pointer checks on the parent directory inode. Finally, rename pTcon to "tcon" to more closely match standard kernel coding style. Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
* [CIFS] Turn off Unicode during session establishment for plaintext ↵Steve French2008-08-28
| | | | | | | | | | | | | authentication LANMAN session setup did not support Unicode (after session setup, unicode can still be used though). Fixes samba bug# 5319 CC: Jeff Layton <jlayton@redhat.com> CC: Stable Kernel <stable@vger.kernel.org> Signed-off-by: Steve French <sfrench@us.ibm.com>
* [CIFS] update cifs change logSteve French2008-08-28
| | | | Signed-off-by: Steve French <sfrench@us.ibm.com>
* cifs: fix O_APPEND on directio mountsJeff Layton2008-08-28
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The direct I/O write codepath for CIFS is done through cifs_user_write(). That function does not currently call generic_write_checks() so the file position isn't being properly set when the file is opened with O_APPEND. It's also not doing the other "normal" checks that should be done for a write call. The problem is currently that when you open a file with O_APPEND on a mount with the directio mount option, the file position is set to the beginning of the file. This makes any subsequent writes clobber the data in the file starting at the beginning. This seems to fix the problem in cursory testing. It is, however important to note that NFS disallows the combination of (O_DIRECT|O_APPEND). If my understanding is correct, the concern is races with multiple clients appending to a file clobbering each others' data. Since the write model for CIFS and NFS is pretty similar in this regard, CIFS is probably subject to the same sort of races. What's unclear to me is why this is a particular problem with O_DIRECT and not with buffered writes... Regardless, disallowing O_APPEND on an entire mount is probably not reasonable, so we'll probably just have to deal with it and reevaluate this flag combination when we get proper support for O_DIRECT. In the meantime this patch at least fixes the existing problem. Signed-off-by: Jeff Layton <jlayton@redhat.com> Cc: Stable Tree <stable@kernel.org> Signed-off-by: Steve French <sfrench@us.ibm.com>
* [CIFS] Fix plaintext authenticationSteve French2008-08-27
| | | | | | | | | | | | | | | | The last eight bytes of the password field were not cleared when doing lanman plaintext password authentication. This patch fixes that. I tested it with Samba by setting password encryption to no in the server's smb.conf. Other servers also can be configured to force plaintext authentication. Note that plaintexti authentication requires setting /proc/fs/cifs/SecurityFlags to 0x30030 on the client (enabling both LANMAN and also plaintext password support). Also note that LANMAN support (and thus plaintext password support) requires CONFIG_CIFS_WEAK_PW_HASH to be enabled in menuconfig. CC: Jeff Layton <jlayton@redhat.com> CC: Stable Kernel <stable@vger.kernel.org> Signed-off-by: Steve French <sfrench@us.ibm.com>
* [CIFS] Add destroy routine for dns_resolverJeff Layton2008-08-27
| | | | | | | | | Otherwise, we're leaking the payload memory. CC: Stable Kernel <stable@vger.kernel.org> Acked-by: David Howells <dhowells@redhat.com> Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
* [CIFS] check version in spnego upcall responseSteve French2008-08-25
| | | | | | | | | Currently, we don't check the version in the SPNEGO upcall response even though one is provided. Jeff and Q have made the corresponding change to the Samba client (cifs.upcall). Acked-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
* [CIFS] Kerberos support not considered experimental anymoreSteve French2008-08-19
| | | | | Acked-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
* [CIFS] distinguish between Kerberos and MSKerberos in upcallSteve French2008-08-19
| | | | | | | | | | | | 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>
* cifs: add local server pointer to cifs_setup_sessionJeff Layton2008-08-19
| | | | | | | | | | cifs_setup_session references pSesInfo->server several times. That pointer shouldn't change during the life of the function so grab it once and store it in a local var. This makes the code look a little cleaner too. Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
* [CIFS] reindent misindented statementIlpo Järvinen2008-08-19
| | | | | Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@helsinki.fi> Signed-off-by: Steve French <sfrench@us.ibm.com>
* [CIFS] mount of IPC$ breaks with iget patchSteve French2008-08-13
| | | | | | | | | | | | | | | | | | In looking at network named pipe support on cifs, I noticed that Dave Howell's iget patch: iget: stop CIFS from using iget() and read_inode() broke mounts to IPC$ (the interprocess communication share), and don't handle the error case (when getting info on the root inode fails). Thanks to Gunter who noted a typo in a debug line in the original version of this patch. CC: David Howells <dhowells@redhat.com> CC: Gunter Kukkukk <linux@kukkukk.com> CC: Stable Kernel <stable@kernel.org> Signed-off-by: Steve French <sfrench@us.ibm.com>
* [CIFS] remove trailing whitespaceSteve French2008-08-11
| | | | Signed-off-by: Steve French <sfrench@us.ibm.com>
* [CIFS] if get root inode fails during mount, cleanup tree connectionSteve French2008-08-11
| | | | | CC: Stable Kernel <stable@kernel.org> Signed-off-by: Steve French <sfrench@us.ibm.com>
* Merge branch 'master' of ↵Linus Torvalds2008-08-08
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6 * 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6: [CIFS] list entry can not return null turn cifs_setattr into a multiplexor that calls the correct function move file time and dos attribute setting logic into new function spin off cifs_setattr with unix extensions to its own function [CIFS] Code cleanup in old sessionsetup code [CIFS] cifs_mkdir and cifs_create should respect the setgid bit on parent dir Rename CIFSSMBSetFileTimes to CIFSSMBSetFileInfo and add PID arg change CIFSSMBSetTimes to CIFSSMBSetPathInfo [CIFS] fix trailing whitespace bundle up Unix SET_PATH_INFO args into a struct and change name Fix missing braces in cifs_revalidate() remove locking around tcpSesAllocCount atomic variable [CIFS] properly account for new user= field in SPNEGO upcall string allocation [CIFS] remove level of indentation from decode_negTokenInit [CIFS] cifs send2 not retrying enough in some cases on full socket [CIFS] oid should also be checked against class in cifs asn
| * [CIFS] list entry can not return nullSteve French2008-08-08
| | | | | | | | Signed-off-by: Steve French <sfrench@us.ibm.com>
| * turn cifs_setattr into a multiplexor that calls the correct functionJeff Layton2008-08-06
| | | | | | | | | | Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
| * move file time and dos attribute setting logic into new functionJeff Layton2008-08-06
| | | | | | | | | | | | | | | | | | | | | | Break up cifs_setattr further by moving the logic that sets file times and dos attributes into a separate function. This patch also refactors the logic a bit so that when the file is already open then we go ahead and do a SetFileInfo call. SetPathInfo seems to be unreliable when setting times on open files. Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
| * spin off cifs_setattr with unix extensions to its own functionJeff Layton2008-08-06
| | | | | | | | | | | | | | | | | | Create a new cifs_setattr_unix function to handle a setattr when unix extensions are enabled and have cifs_setattr call it. Also, clean up variable declarations in cifs_setattr. Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
| * [CIFS] Code cleanup in old sessionsetup codeSteve French2008-08-06
| | | | | | | | | | | | Remove some long lines Signed-off-by: Steve French <sfrench@us.ibm.com>
| * [CIFS] cifs_mkdir and cifs_create should respect the setgid bit on parent dirJeff Layton2008-08-06
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If a server supports unix extensions but does not support POSIX create routines, then the client will create a new inode with a standard SMB mkdir or create/open call and then will set the mode. When it does this, it does not take the setgid bit on the parent directory into account. This patch has CIFS flip on the setgid bit when the parent directory has it. If the share is mounted with "setuids" then also change the group owner to the gid of the parent. This patch should apply cleanly on top of the setattr cleanup patches that I sent a few weeks ago. Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
| * Rename CIFSSMBSetFileTimes to CIFSSMBSetFileInfo and add PID argJeff Layton2008-08-06
| | | | | | | | | | | | | | | | | | | | The new name is more clear since this is also used to set file attributes. We'll need the pid_of_opener arg so that we can pass in filehandles of other pids and spare ourselves an open call. Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
| * change CIFSSMBSetTimes to CIFSSMBSetPathInfoJeff Layton2008-08-06
| | | | | | | | | | | | | | | | | | CIFSSMBSetTimes is a deceptive name. This function does more that just set file times. Change it to CIFSSMBSetPathInfo, which is closer to its real purpose. Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
| * [CIFS] fix trailing whitespaceSteve French2008-08-06
| | | | | | | | | | | | Jeff left trailing whitespace in previous patch Signed-off-by: Steve French <sfrench@us.ibm.com>
| * bundle up Unix SET_PATH_INFO args into a struct and change nameJeff Layton2008-08-06
| | | | | | | | | | | | | | | | | | | | | | We'd like to be able to use the unix SET_PATH_INFO_BASIC args to set file times as well, but that makes the argument list rather long. Bundle up the args for unix SET_PATH_INFO call into a struct. For now, we don't actually use the times fields anywhere. That will be done in a follow-on patch. Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
| * Fix missing braces in cifs_revalidate()Suresh Jayaraman2008-08-05
| | | | | | | | | | | | | | | | | | | | Fix missing braces introduced during commit cea218054ad277d6c126890213afde07b4eb1602. Though setting wbrc to 0 keeps this from causing real bug, this should have been there. Acked-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Suresh Jayaraman <sjayaraman@suse.de> Signed-off-by: Steve French <sfrench@us.ibm.com>
| * remove locking around tcpSesAllocCount atomic variableJeff Layton2008-08-03
| | | | | | | | | | | | | | | | | | | | The global tcpSesAllocCount variable is an atomic already and doesn't really need the extra locking around it. Remove the locking and just use the atomic_inc_return and atomic_dec_return functions to make sure we access it correctly. Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
| * [CIFS] properly account for new user= field in SPNEGO upcall string allocationJeff Layton2008-08-01
| | | | | | | | | | | | | | | | | | | | | | ...it doesn't look like it's being accounted for at the moment. Also try to reorganize the calculation to make it a little more evident what each piece means. This should probably go to the stable series as well... Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
| * [CIFS] remove level of indentation from decode_negTokenInitJeff Layton2008-07-31
| | | | | | | | | | | | | | | | | | Most of this function takes place inside of an unnecessary "else" clause. The other 2 cases both return 0, so we can remove some indentation here. Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
| * [CIFS] cifs send2 not retrying enough in some cases on full socketShirish Pargaonkar2008-07-29
| | | | | | | | | | | | | | | | | | | | | | | | There are cases in which, on a full socket which requires retry on sending data by the app (cifs in this case), that we were not retrying since we did not reinitialize a counter. This fixes the retry logic to retry up to 15 seconds on stuck sockets. Signed-off-by: Shirish Pargaonkar <shirishp@us.ibm.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
| * [CIFS] oid should also be checked against class in cifs asnSteve French2008-07-29
| | | | | | | | | | | | | | | | The oid coming back from asn1_header_decode is a primitive object so class should be checked to be universal. Acked-by: Love Hörnquist Åstrand <lha@kth.se> Signed-off-by: Steve French <sfrench@us.ibm.com>
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