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* [CIFS] cifs: clarify the meaning of tcpStatus == CifsGoodSteve French2011-04-121-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | When the TCP_Server_Info is first allocated and connected, tcpStatus == CifsGood means that the NEGOTIATE_PROTOCOL request has completed and the socket is ready for other calls. cifs_reconnect however sets tcpStatus to CifsGood as soon as the socket is reconnected and the optional RFC1001 session setup is done. We have no clear way to tell the difference between these two states, and we need to know this in order to know whether we can send an echo or not. Resolve this by adding a new statusEnum value -- CifsNeedNegotiate. When the socket has been connected but has not yet had a NEGOTIATE_PROTOCOL request done, set it to this value. Once the NEGOTIATE is done, cifs_negotiate_protocol will set tcpStatus to CifsGood. This also fixes and cleans the logic in cifs_reconnect and cifs_reconnect_tcon. The old code checked for specific states when what it really wants to know is whether the state has actually changed from CifsNeedReconnect. Reported-and-Tested-by: JG <jg@cms.ac> Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
* various endian fixes to cifsSteve French2011-04-121-5/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | make modules C=2 M=fs/cifs CF=-D__CHECK_ENDIAN__ Found for example: CHECK fs/cifs/cifssmb.c fs/cifs/cifssmb.c:728:22: warning: incorrect type in assignment (different base types) fs/cifs/cifssmb.c:728:22: expected unsigned short [unsigned] [usertype] Tid fs/cifs/cifssmb.c:728:22: got restricted __le16 [usertype] <noident> fs/cifs/cifssmb.c:1883:45: warning: incorrect type in assignment (different base types) fs/cifs/cifssmb.c:1883:45: expected long long [signed] [usertype] fl_start fs/cifs/cifssmb.c:1883:45: got restricted __le64 [usertype] start fs/cifs/cifssmb.c:1884:54: warning: restricted __le64 degrades to integer fs/cifs/cifssmb.c:1885:58: warning: restricted __le64 degrades to integer fs/cifs/cifssmb.c:1886:43: warning: incorrect type in assignment (different base types) fs/cifs/cifssmb.c:1886:43: expected unsigned int [unsigned] fl_pid fs/cifs/cifssmb.c:1886:43: got restricted __le32 [usertype] pid In checking new smb2 code for missing endian conversions, I noticed some endian errors had crept in over the last few releases into the cifs code (symlink, ntlmssp, posix lock, and also a less problematic warning in fscache). A followon patch will address a few smb2 endian problems. Reviewed-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
* Fix common misspellingsLucas De Marchi2011-03-311-1/+1
| | | | | | Fixes generated by 'codespell' and manually reviewed. Signed-off-by: Lucas De Marchi <lucas.demarchi@profusion.mobi>
* cifs: remove checks for ses->status == CifsExitingJeff Layton2011-02-071-4/+1Star
| | | | | | | | | ses->status is never set to CifsExiting, so these checks are always false. Tested-by: JG <jg@cms.ac> Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
* cifs: clean up some compiler warningsJeff Layton2011-01-311-3/+0Star
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | New compiler warnings that I noticed when building a patchset based on recent Fedora kernel: fs/cifs/cifssmb.c: In function 'CIFSSMBSetFileSize': fs/cifs/cifssmb.c:4813:8: warning: variable 'data_offset' set but not used [-Wunused-but-set-variable] fs/cifs/file.c: In function 'cifs_open': fs/cifs/file.c:349:24: warning: variable 'pCifsInode' set but not used [-Wunused-but-set-variable] fs/cifs/file.c: In function 'cifs_partialpagewrite': fs/cifs/file.c:1149:23: warning: variable 'cifs_sb' set but not used [-Wunused-but-set-variable] fs/cifs/file.c: In function 'cifs_iovec_write': fs/cifs/file.c:1740:9: warning: passing argument 6 of 'CIFSSMBWrite2' from incompatible pointer type [enabled by default] fs/cifs/cifsproto.h:337:12: note: expected 'unsigned int *' but argument is of type 'size_t *' fs/cifs/readdir.c: In function 'cifs_readdir': fs/cifs/readdir.c:767:23: warning: variable 'cifs_sb' set but not used [-Wunused-but-set-variable] fs/cifs/cifs_dfs_ref.c: In function 'cifs_dfs_d_automount': fs/cifs/cifs_dfs_ref.c:342:2: warning: 'rc' may be used uninitialized in this function [-Wuninitialized] fs/cifs/cifs_dfs_ref.c:278:6: note: 'rc' was declared here Signed-off-by: Jeff Layton <jlayton@redhat.com> Reviewed-by: Pavel Shilovsky <piastry@etersoft.ru> Signed-off-by: Steve French <sfrench@us.ibm.com>
* cifs: fix up CIFSSMBEcho for unaligned accessJeff Layton2011-01-211-3/+3
| | | | | | | | | | | | | | | | Make sure that CIFSSMBEcho can handle unaligned fields. Also fix a minor bug that causes this warning: fs/cifs/cifssmb.c: In function 'CIFSSMBEcho': fs/cifs/cifssmb.c:740: warning: large integer implicitly truncated to unsigned type ...WordCount is u8, not __le16, so no need to convert it. This patch should apply cleanly on top of the rest of the patchset to clean up unaligned access. Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
* cifs: clean up unaligned accesses in validate_t2Jeff Layton2011-01-201-21/+23
| | | | | | | | | ...and clean up function to reduce indentation. Signed-off-by: Jeff Layton <jlayton@redhat.com> Acked-by: Pavel Shilovsky <piastryyy@gmail.com> Reviewed-by: Shirish Pargaonkar <shirishpargaonkar@gmail.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
* cifs: use get/put_unaligned functions to access ByteCountJeff Layton2011-01-201-9/+5Star
| | | | | | | | | | | | | | | | It's possible that when we access the ByteCount that the alignment will be off. Most CPUs deal with that transparently, but there's usually some performance impact. Some CPUs raise an exception on unaligned accesses. Fix this by accessing the byte count using the get_unaligned and put_unaligned inlined functions. While we're at it, fix the types of some of the variables that end up getting returns from these functions. Acked-by: Pavel Shilovsky <piastryyy@gmail.com> Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
* cifs: TCP_Server_Info dietJeff Layton2011-01-201-2/+0Star
| | | | | | | | | | | | | | | | | | | | | | | | Remove fields that are completely unused, and rearrange struct according to recommendations by "pahole". Before: /* size: 1112, cachelines: 18, members: 49 */ /* sum members: 1086, holes: 8, sum holes: 26 */ /* bit holes: 1, sum bit holes: 7 bits */ /* last cacheline: 24 bytes */ After: /* size: 1072, cachelines: 17, members: 42 */ /* sum members: 1065, holes: 3, sum holes: 7 */ /* last cacheline: 48 bytes */ ...savings of 40 bytes per struct on x86_64. 21 bytes by field removal, and 19 by reorganizing to eliminate holes. Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
* cifs: remove code for setting timeouts on requestsJeff Layton2011-01-201-4/+4
| | | | | | | | | | Since we don't time out individual requests anymore, remove the code that we used to use for setting timeouts on different requests. Reviewed-by: Pavel Shilovsky <piastryyy@gmail.com> Reviewed-by: Suresh Jayaraman <sjayaraman@suse.de> Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
* cifs: add ability to send an echo requestJeff Layton2011-01-201-0/+47
| | | | | | Reviewed-by: Suresh Jayaraman <sjayaraman@suse.de> Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
* CIFS: Fix oplock break handling (try #2)Pavel Shilovsky2011-01-191-1/+3
| | | | | | | | | | | | | | | When we get oplock break notification we should set the appropriate value of OplockLevel field in oplock break acknowledge according to the oplock level held by the client in this time. As we only can have level II oplock or no oplock in the case of oplock break, we should be aware only about clientCanCacheRead field in cifsInodeInfo structure. Also fix bug connected with wrong interpretation of OplockLevel field during oplock break notification processing. Signed-off-by: Pavel Shilovsky <piastryyy@gmail.com> Cc: <stable@kernel.org> Signed-off-by: Steve French <sfrench@us.ibm.com>
* cifs: move "ntlmssp" and "local_leases" options out of experimental codeJeff Layton2011-01-101-4/+1Star
| | | | | | | | | | | | | | | | | | | I see no real need to leave these sorts of options under an EXPERIMENTAL ifdef. Since you need a mount option to turn this code on, that only blows out the testing matrix. local_leases has been under the EXPERIMENTAL tag for some time, but it's only the mount option that's under this label. Move it out from under this tag. The NTLMSSP code is also under EXPERIMENTAL, but it needs a mount option to turn it on, and in the future any distro will reasonably want this enabled. Go ahead and move it out from under the EXPERIMENTAL tag. Signed-off-by: Jeff Layton <jlayton@redhat.com> Acked-by: Suresh Jayaraman <sjayaraman@suse.de> Signed-off-by: Steve French <sfrench@us.ibm.com>
* cifs: fix use of CONFIG_CIFS_ACLJeff Layton2010-12-061-91/+92
| | | | | | | | | | | | | | Some of the code under CONFIG_CIFS_ACL is dependent upon code under CONFIG_CIFS_EXPERIMENTAL, but the Kconfig options don't reflect that dependency. Move more of the ACL code out from under CONFIG_CIFS_EXPERIMENTAL and under CONFIG_CIFS_ACL. Also move find_readable_file out from other any sort of Kconfig option and make it a function normally compiled in. Reported-and-Acked-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
* NTLM auth and sign - Use appropriate server challengeShirish Pargaonkar2010-10-291-2/+2
| | | | | | | | | | | | | | | | | | Need to have cryptkey or server challenge in smb connection (struct TCP_Server_Info) for ntlm and ntlmv2 auth types for which cryptkey (Encryption Key) is supplied just once in Negotiate Protocol response during an smb connection setup for all the smb sessions over that smb connection. For ntlmssp, cryptkey or server challenge is provided for every smb session in type 2 packet of ntlmssp negotiation, the cryptkey provided during Negotiation Protocol response before smb connection does not count. Rename cryptKey to cryptkey and related changes. Signed-off-by: Shirish Pargaonkar <shirishpargaonkar@gmail.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
* cifs: convert cifs_tcp_ses_lock from a rwlock to a spinlockSuresh Jayaraman2010-10-211-3/+3
| | | | | | | | | | | | | | cifs_tcp_ses_lock is a rwlock with protects the cifs_tcp_ses_list, server->smb_ses_list and the ses->tcon_list. It also protects a few ref counters in server, ses and tcon. In most cases the critical section doesn't seem to be large, in a few cases where it is slightly large, there seem to be really no benefit from concurrent access. I briefly considered RCU mechanism but it appears to me that there is no real need. Replace it with a spinlock and get rid of the last rwlock in the cifs code. Signed-off-by: Suresh Jayaraman <sjayaraman@suse.de> Signed-off-by: Steve French <sfrench@us.ibm.com>
* cifs: convert GlobalSMBSeslock from a rwlock to regular spinlockJeff Layton2010-10-181-2/+2
| | | | | | | | | | | | | | | | | | | | | Convert this lock to a regular spinlock A rwlock_t offers little value here. It's more expensive than a regular spinlock unless you have a fairly large section of code that runs under the read lock and can benefit from the concurrency. Additionally, we need to ensure that the refcounting for files isn't racy and to do that we need to lock areas that can increment it for write. That means that the areas that can actually use a read_lock are very few and relatively infrequently used. While we're at it, change the name to something easier to type, and fix a bug in find_writable_file. cifsFileInfo_put can sleep and shouldn't be called while holding the lock. Signed-off-by: Jeff Layton <jlayton@redhat.com> Reviewed-by: Suresh Jayaraman <sjayaraman@suse.de> Signed-off-by: Steve French <sfrench@us.ibm.com>
* NTLM authentication and signing - Calculate auth response per smb sessionShirish Pargaonkar2010-10-141-2/+2
| | | | | | | | | | | | | | | | Start calculation auth response within a session. Move/Add pertinet data structures like session key, server challenge and ntlmv2_hash in a session structure. We should do the calculations within a session before copying session key and response over to server data structures because a session setup can fail. Only after a very first smb session succeeds, it copies/makes its session key, session key of smb connection. This key stays with the smb connection throughout its life. Signed-off-by: Shirish Pargaonkar <shirishpargaonkar@gmail.com> Reviewed-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
* Merge branch 'for-next'Steve French2010-10-081-7/+9
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| * cifs NTLMv2/NTLMSSP ntlmv2 within ntlmssp autentication codeShirish Pargaonkar2010-09-291-7/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Attribue Value (AV) pairs or Target Info (TI) pairs are part of ntlmv2 authentication. Structure ntlmv2_resp had only definition for two av pairs. So removed it, and now allocation of av pairs is dynamic. For servers like Windows 7/2008, av pairs sent by server in challege packet (type 2 in the ntlmssp exchange/negotiation) can vary. Server sends them during ntlmssp negotiation. So when ntlmssp is used as an authentication mechanism, type 2 challenge packet from server has this information. Pluck it and use the entire blob for authenticaiton purpose. If user has not specified, extract (netbios) domain name from the av pairs which is used to calculate ntlmv2 hash. Servers like Windows 7 are particular about the AV pair blob. Servers like Windows 2003, are not very strict about the contents of av pair blob used during ntlmv2 authentication. So when security mechanism such as ntlmv2 is used (not ntlmv2 in ntlmssp), there is no negotiation and so genereate a minimal blob that gets used in ntlmv2 authentication as well as gets sent. Fields tilen and tilbob are session specific. AV pair values are defined. To calculate ntlmv2 response we need ti/av pair blob. For sec mech like ntlmssp, the blob is plucked from type 2 response from the server. From this blob, netbios name of the domain is retrieved, if user has not already provided, to be included in the Target String as part of ntlmv2 hash calculations. For sec mech like ntlmv2, create a minimal, two av pair blob. The allocated blob is freed in case of error. In case there is no error, this blob is used in calculating ntlmv2 response (in CalcNTLMv2_response) and is also copied on the response to the server, and then freed. The type 3 ntlmssp response is prepared on a buffer, 5 * sizeof of struct _AUTHENTICATE_MESSAGE, an empirical value large enough to hold _AUTHENTICATE_MESSAGE plus a blob with max possible 10 values as part of ntlmv2 response and lmv2 keys and domain, user, workstation names etc. Also, kerberos gets selected as a default mechanism if server supports it, over the other security mechanisms. Signed-off-by: Shirish Pargaonkar <shirishpargaonkar@gmail.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
* | cifs: prevent infinite recursion in cifs_reconnect_tconJeff Layton2010-10-011-16/+33
|/ | | | | | | | | | | | | | | | | | | cifs_reconnect_tcon is called from smb_init. After a successful reconnect, cifs_reconnect_tcon will call reset_cifs_unix_caps. That function will, in turn call CIFSSMBQFSUnixInfo and CIFSSMBSetFSUnixInfo. Those functions also call smb_init. It's possible for the session and tcon reconnect to succeed, and then for another cifs_reconnect to occur before CIFSSMBQFSUnixInfo or CIFSSMBSetFSUnixInfo to be called. That'll cause those functions to call smb_init and cifs_reconnect_tcon again, ad infinitum... Break the infinite recursion by having those functions use a new smb_init variant that doesn't attempt to perform a reconnect. Reported-and-Tested-by: Michal Suchanek <hramrach@centrum.cz> Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
* Revert "[CIFS] Fix ntlmv2 auth with ntlmssp"Steve French2010-09-081-8/+5Star
| | | | | | | | | | | | This reverts commit 9fbc590860e75785bdaf8b83e48fabfe4d4f7d58. The change to kernel crypto and fixes to ntlvm2 and ntlmssp series, introduced a regression. Deferring this patch series to 2.6.37 after Shirish fixes it. Signed-off-by: Steve French <sfrench@us.ibm.com> Acked-by: Jeff Layton <jlayton@redhat.com> CC: Shirish Pargaonkar <shirishp@us.ibm.com>
* [CIFS] Fix ntlmv2 auth with ntlmsspSteve French2010-08-201-5/+8
| | | | | | | | | | | | | | | | | | | | | Make ntlmv2 as an authentication mechanism within ntlmssp instead of ntlmv1. Parse type 2 response in ntlmssp negotiation to pluck AV pairs and use them to calculate ntlmv2 response token. Also, assign domain name from the sever response in type 2 packet of ntlmssp and use that (netbios) domain name in calculation of response. Enable cifs/smb signing using rc4 and md5. Changed name of the structure mac_key to session_key to reflect the type of key it holds. Use kernel crypto_shash_* APIs instead of the equivalent cifs functions. Signed-off-by: Shirish Pargaonkar <shirishpargaonkar@gmail.com> Acked-by: Herbert Xu <herbert@gondor.apana.org.au> Signed-off-by: Steve French <sfrench@us.ibm.com>
* cifs: have decode_negTokenInit set flags in server structJeff Layton2010-05-061-3/+9
| | | | | | | | ...rather than the secType. This allows us to get rid of the MSKerberos securityEnum. The client just makes a decision at upcall time. Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
* cifs: break negotiate protocol calls out of cifs_setup_sessionJeff Layton2010-05-061-1/+2
| | | | | | | | So that we can reasonably set up the secType based on both the NegotiateProtocol response and the parsed mount options. Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
* cifs: save the dialect chosen by serverJeff Layton2010-04-271-6/+5Star
| | | | | Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
* cifs: rename "extended_security" to "global_secflags"Jeff Layton2010-04-261-1/+1
| | | | | | | ...since that more accurately describes what that variable holds. Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
* [CIFS] Cleanup various minor breakage in previous cFYI cleanupSteve French2010-04-211-11/+11
| | | | Signed-off-by: Steve French <sfrench@us.ibm.com>
* [CIFS] Neaten cERROR and cFYI macros, reduce text spaceJoe Perches2010-04-211-199/+194Star
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Neaten cERROR and cFYI macros, reduce text space ~2.5K Convert '__FILE__ ": " fmt' to '"%s: " fmt', __FILE__' to save text space Surround macros with do {} while Add parentheses to macros Make statement expression macro from macro with assign Remove now unnecessary parentheses from cFYI and cERROR uses defconfig with CIFS support old $ size fs/cifs/built-in.o text data bss dec hex filename 156012 1760 148 157920 268e0 fs/cifs/built-in.o defconfig with CIFS support old $ size fs/cifs/built-in.o text data bss dec hex filename 153508 1760 148 155416 25f18 fs/cifs/built-in.o allyesconfig old: $ size fs/cifs/built-in.o text data bss dec hex filename 309138 3864 74824 387826 5eaf2 fs/cifs/built-in.o allyesconfig new $ size fs/cifs/built-in.o text data bss dec hex filename 305655 3864 74824 384343 5dd57 fs/cifs/built-in.o Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
* Merge git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6Linus Torvalds2010-04-081-2/+32
|\ | | | | | | | | | | | | | | * git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6: not overwriting file_lock structure after GET_LK cifs: Fix a kernel BUG with remote OS/2 server (try #3) [CIFS] initialize nbytes at the beginning of CIFSSMBWrite() [CIFS] Add mmap for direct, nobrl cifs mount types
| * not overwriting file_lock structure after GET_LKPavel Shilovsky2010-04-061-1/+14
| | | | | | | | | | | | | | | | | | | | If we have preventing lock, cifs should overwrite file_lock structure with info about preventing lock. If we haven't preventing lock, cifs should leave it unchanged except for the lock type (change it to F_UNLCK). Signed-off-by: Pavel Shilovsky <piastryyy@gmail.com> Reviewed-by: Jeff Layton <jlayton@samba.org> Signed-off-by: Steve French <sfrench@us.ibm.com>
| * cifs: Fix a kernel BUG with remote OS/2 server (try #3)Suresh Jayaraman2010-04-031-0/+16
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | While chasing a bug report involving a OS/2 server, I noticed the server sets pSMBr->CountHigh to a incorrect value even in case of normal writes. This results in 'nbytes' being computed wrongly and triggers a kernel BUG at mm/filemap.c. void iov_iter_advance(struct iov_iter *i, size_t bytes) { BUG_ON(i->count < bytes); <--- BUG here Why the server is setting 'CountHigh' is not clear but only does so after writing 64k bytes. Though this looks like the server bug, the client side crash may not be acceptable. The workaround is to mask off high 16 bits if the number of bytes written as returned by the server is greater than the bytes requested by the client as suggested by Jeff Layton. CC: Stable <stable@kernel.org> Reviewed-by: Jeff Layton <jlayton@samba.org> Signed-off-by: Suresh Jayaraman <sjayaraman@suse.de> Signed-off-by: Steve French <sfrench@us.ibm.com>
| * [CIFS] initialize nbytes at the beginning of CIFSSMBWrite()Steve French2010-04-031-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | By doing this we always overwrite nbytes value that is being passed on to CIFSSMBWrite() and need not rely on the callers to initialize. CIFSSMBWrite2 is doing this already. CC: Stable <stable@kernel.org> Reviewed-by: Shirish Pargaonkar <shirishpargaonkar@gmail.com> Reviewed-by: Jeff Layton <jlayton@samba.org> Signed-off-by: Suresh Jayaraman <sjayaraman@suse.de> Signed-off-by: Steve French <sfrench@us.ibm.com>
* | include cleanup: Update gfp.h and slab.h includes to prepare for breaking ↵Tejun Heo2010-03-301-0/+1
|/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | implicit slab.h inclusion from percpu.h percpu.h is included by sched.h and module.h and thus ends up being included when building most .c files. percpu.h includes slab.h which in turn includes gfp.h making everything defined by the two files universally available and complicating inclusion dependencies. percpu.h -> slab.h dependency is about to be removed. Prepare for this change by updating users of gfp and slab facilities include those headers directly instead of assuming availability. As this conversion needs to touch large number of source files, the following script is used as the basis of conversion. http://userweb.kernel.org/~tj/misc/slabh-sweep.py The script does the followings. * Scan files for gfp and slab usages and update includes such that only the necessary includes are there. ie. if only gfp is used, gfp.h, if slab is used, slab.h. * When the script inserts a new include, it looks at the include blocks and try to put the new include such that its order conforms to its surrounding. It's put in the include block which contains core kernel includes, in the same order that the rest are ordered - alphabetical, Christmas tree, rev-Xmas-tree or at the end if there doesn't seem to be any matching order. * If the script can't find a place to put a new include (mostly because the file doesn't have fitting include block), it prints out an error message indicating which .h file needs to be added to the file. The conversion was done in the following steps. 1. The initial automatic conversion of all .c files updated slightly over 4000 files, deleting around 700 includes and adding ~480 gfp.h and ~3000 slab.h inclusions. The script emitted errors for ~400 files. 2. Each error was manually checked. Some didn't need the inclusion, some needed manual addition while adding it to implementation .h or embedding .c file was more appropriate for others. This step added inclusions to around 150 files. 3. The script was run again and the output was compared to the edits from #2 to make sure no file was left behind. 4. Several build tests were done and a couple of problems were fixed. e.g. lib/decompress_*.c used malloc/free() wrappers around slab APIs requiring slab.h to be added manually. 5. The script was run on all .h files but without automatically editing them as sprinkling gfp.h and slab.h inclusions around .h files could easily lead to inclusion dependency hell. Most gfp.h inclusion directives were ignored as stuff from gfp.h was usually wildly available and often used in preprocessor macros. Each slab.h inclusion directive was examined and added manually as necessary. 6. percpu.h was updated not to include slab.h. 7. Build test were done on the following configurations and failures were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my distributed build env didn't work with gcov compiles) and a few more options had to be turned off depending on archs to make things build (like ipr on powerpc/64 which failed due to missing writeq). * x86 and x86_64 UP and SMP allmodconfig and a custom test config. * powerpc and powerpc64 SMP allmodconfig * sparc and sparc64 SMP allmodconfig * ia64 SMP allmodconfig * s390 SMP allmodconfig * alpha SMP allmodconfig * um on x86_64 SMP allmodconfig 8. percpu.h modifications were reverted so that it could be applied as a separate patch and serve as bisection point. Given the fact that I had only a couple of failures from tests on step 6, I'm fairly confident about the coverage of this conversion patch. If there is a breakage, it's likely to be something in one of the arch headers which should be easily discoverable easily on most builds of the specific arch. Signed-off-by: Tejun Heo <tj@kernel.org> Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
* Merge git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6Linus Torvalds2010-03-191-1/+134
|\ | | | | | | | | | | | | | | | | | | * git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6: cifs: trivial white space [CIFS] checkpatch cleanup cifs: add cifs_revalidate_file cifs: add a CIFSSMBUnixQFileInfo function cifs: add a CIFSSMBQFileInfo function cifs: overhaul cifs_revalidate and rename to cifs_revalidate_dentry
| * cifs: trivial white spaceDan Carpenter2010-03-151-1/+1
| | | | | | | | | | | | | | I fixed the indent level. Signed-off-by: Dan Carpenter <error27@gmail.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
| * cifs: add a CIFSSMBUnixQFileInfo functionJeff Layton2010-03-061-0/+69
| | | | | | | | | | | | | | ...to allow us to get unix attrs via filehandle. Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
| * cifs: add a CIFSSMBQFileInfo functionJeff Layton2010-03-061-0/+64
| | | | | | | | | | | | | | | | | | | | | | | | ...to get inode attributes via filehandle instead of by path. In some places, we need to revalidate an inode on an open filehandle, but we can't necessarily guarantee that the dentry associated with it will still be valid. When we have an open filehandle already, it makes more sense to do a filehandle based operation anyway. Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
* | Merge branch 'for-next' into for-linusJiri Kosina2010-03-081-1/+1
|\ \ | |/ |/| | | | | | | | | | | | | Conflicts: Documentation/filesystems/proc.txt arch/arm/mach-u300/include/mach/debug-macro.S drivers/net/qlge/qlge_ethtool.c drivers/net/qlge/qlge_main.c drivers/net/typhoon.c
| * tree-wide: Assorted spelling fixesDaniel Mack2010-02-091-1/+1
| | | | | | | | | | | | | | | | | | | | | | In particular, several occurances of funny versions of 'success', 'unknown', 'therefore', 'acknowledge', 'argument', 'achieve', 'address', 'beginning', 'desirable', 'separate' and 'necessary' are fixed. Signed-off-by: Daniel Mack <daniel@caiaq.de> Cc: Joe Perches <joe@perches.com> Cc: Junio C Hamano <gitster@pobox.com> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
* | [CIFS] pSesInfo->sesSem is used as mutex. Rename it to session_mutex andSteve French2010-02-251-6/+6
| | | | | | | | | | | | | | | | convert it to a real mutex. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
* | [CIFS] Use unsigned ea length for claritySteve French2010-02-241-1/+1
| | | | | | | | | | | | Jeff correctly noted that using unsigned ea length is more intuitive. CC: Jeff Lyaton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
* | [CIFS] Minor cleanup to EA patchSteve French2010-02-231-1/+1
| | | | | | | | | | CC: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
* | cifs: merge CIFSSMBQueryEA with CIFSSMBQAllEAsJeff Layton2010-02-231-167/+47Star
| | | | | | | | | | | | | | | | | | | | Add an "ea_name" parameter to CIFSSMBQAllEAs. When it's set make it behave like CIFSSMBQueryEA does now. The current callers of CIFSSMBQueryEA are converted to use CIFSSMBQAllEAs, and the old CIFSSMBQueryEA function is removed. Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
* | cifs: verify lengths of QueryAllEAs replyJeff Layton2010-02-231-18/+31
| | | | | | | | | | | | | | | | Make sure the lengths in a QUERY_ALL_EAS reply don't make the parser walk off the end of the SMB. Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
* | cifs: increase maximum buffer size in CIFSSMBQAllEAsJeff Layton2010-02-231-1/+1
| | | | | | | | | | | | | | | | It's 4000 now, but there's no reason to limit it to that. We should be able to handle a response up to CIFSMaxBufSize. Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
* | cifs: rename name_len to list_len in CIFSSMBQAllEAsJeff Layton2010-02-231-19/+19
| | | | | | | | | | | | | | ...for clarity and so we can reuse the name for the real name_len. Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
* | cifs: clean up indentation in CIFSSMBQAllEAsJeff Layton2010-02-231-76/+75Star
|/ | | | | | | | Add a label that we can goto on error, and reduce some of the if/then/else indentation in this function. Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
* cifs: convert oplock breaks to use slow_work facility (try #4)Jeff Layton2009-09-241-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This is the fourth respin of the patch to convert oplock breaks to use the slow_work facility. A customer of ours was testing a backport of one of the earlier patchsets, and hit a "Busy inodes after umount..." problem. An oplock break job had raced with a umount, and the superblock got torn down and its memory reused. When the oplock break job tried to dereference the inode->i_sb, the kernel oopsed. This patchset has the oplock break job hold an inode and vfsmount reference until the oplock break completes. With this, there should be no need to take a tcon reference (the vfsmount implicitly holds one already). Currently, when an oplock break comes in there's a chance that the oplock break job won't occur if the allocation of the oplock_q_entry fails. There are also some rather nasty races in the allocation and handling these structs. Rather than allocating oplock queue entries when an oplock break comes in, add a few extra fields to the cifsFileInfo struct. Get rid of the dedicated cifs_oplock_thread as well and queue the oplock break job to the slow_work thread pool. This approach also has the advantage that the oplock break jobs can potentially run in parallel rather than be serialized like they are today. Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
* cifs: consolidate reconnect logic in smb_init routinesJeff Layton2009-09-031-189/+123Star
| | | | | | | | | There's a large cut and paste chunk of code in smb_init and small_smb_init to handle reconnects. Break it out into a separate function, clean it up and have both routines call it. Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
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