Commit Graph

332 Commits

Author SHA1 Message Date
Jeff Layton
fec344e3f3 cifs: change cifs_call_async to use smb_rqst structs
For now, none of the callers populate rq_pages. That will be done for
writes in a later patch. While we're at it, change the prototype of
setup_async_request not to need a return pointer argument. Just
return the pointer to the mid_q_entry or an ERR_PTR.

Reviewed-by: Pavel Shilovsky <pshilovsky@samba.org>
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <smfrench@gmail.com>
2012-09-24 21:46:31 -05:00
Jeff Layton
fb308a6f22 cifs: teach signing routines how to deal with arrays of pages in a smb_rqst
Use the smb_send_rqst helper function to kmap each page in the array
and update the hash for that chunk.

Reviewed-by: Pavel Shilovsky <pshilovsky@samba.org>
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <smfrench@gmail.com>
2012-09-24 21:46:31 -05:00
Jeff Layton
bf5ea0e2f2 cifs: change signing routines to deal with smb_rqst structs
We need a way to represent a call to be sent on the wire that does not
require having all of the page data kmapped. Behold the smb_rqst struct.
This new struct represents an array of kvecs immediately followed by an
array of pages.

Convert the signing routines to use these structs under the hood and
turn the existing functions for this into wrappers around that. For now,
we're just changing these functions to take different args. Later, we'll
teach them how to deal with arrays of pages.

Reviewed-by: Pavel Shilovsky <pshilovsky@samba.org>
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <smfrench@gmail.com>
2012-09-24 21:46:30 -05:00
Pavel Shilovsky
92fc65a74a CIFS: Move readdir code to ops struct
Signed-off-by: Pavel Shilovsky <pshilovsky@samba.org>
Signed-off-by: Steve French <smfrench@gmail.com>
2012-09-24 21:46:29 -05:00
Pavel Shilovsky
d143341815 CIFS: Move set_file_size to ops struct
Signed-off-by: Pavel Shilovsky <pshilovsky@samba.org>
Signed-off-by: Steve French <smfrench@gmail.com>
2012-09-24 21:46:29 -05:00
Steve French
d6e906f1b5 CIFS: Move hardlink to ops struct
Signed-off-by: Pavel Shilovsky <pshilovsky@samba.org>
Signed-off-by: Steve French <sfrench@us.ibm.com>
Signed-off-by: Steve French <smfrench@gmail.com>
2012-09-24 21:46:29 -05:00
Pavel Shilovsky
8ceb984379 CIFS: Move rename to ops struct
Signed-off-by: Pavel Shilovsky <pshilovsky@samba.org>
Signed-off-by: Steve French <smfrench@gmail.com>
2012-09-24 21:46:28 -05:00
Pavel Shilovsky
3c1bf7e48e CIFS: Enable signing in SMB2
Use hmac-sha256 and rather than hmac-md5 that is used for CIFS/SMB.

Signature field in SMB2 header is 16 bytes instead of 8 bytes.

Automatically enable signing by client when requested by the server
when signing ability is available to the client.

Signed-off-by: Shirish Pargaonkar <shirishpargaonkar@gmail.com>
Signed-off-by: Sachin Prabhu <sprabhu@redhat.com>
Signed-off-by: Pavel Shilovsky <piastryyy@gmail.com>
Signed-off-by: Steve French <smfrench@gmail.com>
2012-09-24 21:46:28 -05:00
Pavel Shilovsky
ba9ad7257a CIFS: Move writepage to ops struct
Signed-off-by: Pavel Shilovsky <pshilovsky@samba.org>
Signed-off-by: Steve French <smfrench@gmail.com>
2012-09-24 21:46:28 -05:00
Pavel Shilovsky
3331914125 CIFS: Add SMB2 support for cifs_iovec_write
Signed-off-by: Pavel Shilovsky <pshilovsky@samba.org>
Signed-off-by: Steve French <smfrench@gmail.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2012-09-24 21:46:28 -05:00
Pavel Shilovsky
09a4707e76 CIFS: Add SMB2 support for cifs_iovec_read
Signed-off-by: Pavel Shilovsky <pshilovsky@samba.org>
Signed-off-by: Steve French <smfrench@gmail.com>
2012-09-24 21:46:27 -05:00
Pavel Shilovsky
4ad6504453 CIFS: Move guery file info code to ops struct
and make cifs_get_file_info(_unix) calls static.

Signed-off-by: Pavel Shilovsky <pshilovsky@samba.org>
Signed-off-by: Steve French <smfrench@gmail.com>
2012-09-24 21:46:26 -05:00
Pavel Shilovsky
fb1214e48f CIFS: Move open code to ops struct
Acked-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Pavel Shilovsky <pshilovsky@samba.org>
Signed-off-by: Steve French <smfrench@gmail.com>
2012-09-24 21:46:26 -05:00
Pavel Shilovsky
ed6875e0d6 CIFS: Move unlink code to ops struct
Reviewed-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Pavel Shilovsky <pshilovsky@samba.org>
Signed-off-by: Steve French <smfrench@gmail.com>
2012-09-24 21:46:26 -05:00
Pavel Shilovsky
f958ca5d88 CIFS: Move rmdir code to ops struct
Signed-off-by: Pavel Shilovsky <pshilovsky@samba.org>
Signed-off-by: Steve French <smfrench@gmail.com>
2012-07-27 15:17:47 -05:00
Pavel Shilovsky
f436720e94 CIFS: Separate protocol specific part from mkdir
Signed-off-by: Pavel Shilovsky <piastry@etersoft.ru>
Signed-off-by: Steve French <smfrench@gmail.com>
2012-07-27 15:17:40 -05:00
Pavel Shilovsky
ff691e9694 CIFS: Simplify cifs_mkdir call
Signed-off-by: Pavel Shilovsky <piastry@etersoft.ru>
Signed-off-by: Steve French <smfrench@gmail.com>
2012-07-27 15:17:16 -05:00
Pavel Shilovsky
45740847e2 CIFS: Setup async request in ops struct
Signed-off-by: Pavel Shilovsky <pshilovsky@samba.org>
Signed-off-by: Steve French <smfrench@gmail.com>
2012-07-24 21:55:12 +04:00
Pavel Shilovsky
9224dfc2f9 CIFS: Move building path to root to ops struct
Signed-off-by: Pavel Shilovsky <pshilovsky@samba.org>
Signed-off-by: Steve French <smfrench@gmail.com>
2012-07-24 21:55:10 +04:00
Pavel Shilovsky
1208ef1f76 CIFS: Move query inode info code to ops struct
Signed-off-by: Pavel Shilovsky <pshilovsky@samba.org>
Signed-off-by: Steve French <smfrench@gmail.com>
2012-07-24 21:55:07 +04:00
Pavel Shilovsky
68889f269b CIFS: Move is_path_accessible to ops struct
Signed-off-by: Pavel Shilovsky <pshilovsky@samba.org>
Signed-off-by: Steve French <smfrench@gmail.com>
2012-07-24 21:55:04 +04:00
Pavel Shilovsky
b669f33ca6 CIFS: Move getting dfs referalls to ops struct
Signed-off-by: Pavel Shilovsky <pshilovsky@samba.org>
Signed-off-by: Steve French <smfrench@gmail.com>
2012-07-24 21:55:01 +04:00
Pavel Shilovsky
aa24d1e969 CIFS: Process reconnects for SMB2 shares
Signed-off-by: Pavel Shilovsky <piastry@etersoft.ru>
Signed-off-by: Steve French <smfrench@gmail.com>
2012-07-24 21:54:59 +04:00
Pavel Shilovsky
28ea5290d7 CIFS: Add SMB2 credits support
For SMB2 protocol we can add more than one credit for one received
request: it depends on CreditRequest field in SMB2 response header.
Also we divide all requests by type: echoes, oplocks and others.
Each type uses its own slot pull.

Reviewed-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Pavel Shilovsky <pshilovsky@samba.org>
Signed-off-by: Steve French <smfrench@gmail.com>
2012-07-24 10:25:23 -05:00
Pavel Shilovsky
2dc7e1c033 CIFS: Make transport routines work with SMB2
Reviewed-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Pavel Shilovsky <piastry@etersoft.ru>
Signed-off-by: Steve French <smfrench@gmail.com>
2012-07-24 10:25:20 -05:00
Pavel Shilovsky
6d5786a34d CIFS: Rename Get/FreeXid and make them work with unsigned int
Acked-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Pavel Shilovsky <pshilovsky@samba.org>
Signed-off-by: Steve French <smfrench@gmail.com>
2012-07-24 10:25:08 -05:00
Pavel Shilovsky
2e6e02ab6d CIFS: Move protocol specific tcon/tdis code to ops struct
and rename variables around the code changes.

Reviewed-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Pavel Shilovsky <pshilovsky@samba.org>
Signed-off-by: Steve French <smfrench@gmail.com>
2012-07-24 10:25:06 -05:00
Pavel Shilovsky
58c45c58a1 CIFS: Move protocol specific session setup/logoff code to ops struct
Reviewed-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Pavel Shilovsky <pshilovsky@samba.org>
Signed-off-by: Steve French <smfrench@gmail.com>
2012-07-24 10:25:03 -05:00
Pavel Shilovsky
286170aa24 CIFS: Move protocol specific negotiate code to ops struct
Reviewed-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Pavel Shilovsky <pshilovsky@samba.org>
Signed-off-by: Steve French <smfrench@gmail.com>
2012-07-24 00:33:26 -05:00
Pavel Shilovsky
a891f0f895 CIFS: Extend credit mechanism to process request type
Split all requests to echos, oplocks and others - each group uses
its own credit slot. This is indicated by new flags

CIFS_ECHO_OP and CIFS_OBREAK_OP

that are not used now for CIFS. This change is required to support
SMB2 protocol because of different processing of these commands.

Acked-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Pavel Shilovsky <pshilovsky@samba.org>
Signed-off-by: Steve French <smfrench@gmail.com>
2012-07-24 00:32:48 -05:00
Jeff Layton
762a4206a3 cifs: rename cifs_sign_smb2 to cifs_sign_smbv
"smb2" makes me think of the SMB2.x protocol, which isn't at all what
this function is for...

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <smfrench@gmail.com>
2012-07-23 16:36:34 -05:00
Jeff Layton
c5fd363d77 cifs: move file_lock off stack in cifs_push_posix_locks
struct file_lock is pretty large, so we really don't want that on the
stack in a potentially long call chain. Reorganize the arguments to
CIFSSMBPosixLock to eliminate the need for that.

Eliminate the get_flag and simply use a non-NULL pLockInfo to indicate
that this is a "get" operation. In order to do that, need to add a new
loff_t argument for the start_offset.

Reported-by: Al Viro <viro@ZenIV.linux.org.uk>
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <smfrench@gmail.com>
2012-07-23 16:36:29 -05:00
Pavel Shilovsky
8825736060 CIFS: Move get_next_mid to ops struct
Reviewed-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Pavel Shilovsky <pshilovsky@samba.org>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2012-06-01 12:35:19 -05:00
Pavel Shilovsky
452757897a CIFS: Move add/set_credits and get_credits_field to ops structure
Acked-by: Shirish Pargaonkar <shirishpargaonkar@gmail.com>
Reviewed-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Pavel Shilovsky <piastry@etersoft.ru>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2012-05-23 12:33:12 +04:00
Pavel Shilovsky
082d0642c6 CIFS: Move protocol specific part from SendReceive2 to ops struct
Acked-by: Shirish Pargaonkar <shirishpargaonkar@gmail.com>
Reviewed-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Pavel Shilovsky <piastry@etersoft.ru>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2012-05-23 12:32:57 +04:00
Shirish Pargaonkar
2608bee744 cifs: Include backup intent search flags during searches {try #2)
As observed and suggested by Tushar Gosavi...

---------
readdir calls these function to send TRANS2_FIND_FIRST and
TRANS2_FIND_NEXT command to the server. The current cifs module is
not specifying CIFS_SEARCH_BACKUP_SEARCH flag while sending these
command when backupuid/backupgid is specified. This can be resolved
by specifying CIFS_SEARCH_BACKUP_SEARCH flag.
---------

Cc: <stable@kernel.org>
Reported-and-Tested-by: Tushar Gosavi <tugosavi@in.ibm.com>
Signed-off-by: Shirish Pargaonkar <shirishpargaonkar@gmail.com>
Acked-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2012-05-17 13:07:49 +04:00
Jeff Layton
1c89254926 cifs: convert cifs_iovec_read to use async reads
Convert cifs_iovec_read to use async I/O. This also raises the limit on
the rsize for uncached reads. We first allocate a set of pages to hold
the replies, then issue the reads in parallel and then collect the
replies and copy the results into the iovec.

A possible future optimization would be to kmap and inline the iovec
buffers and read the data directly from the socket into that. That would
require some rather complex conversion of the iovec into a kvec however.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
2012-05-16 20:13:31 -05:00
Jeff Layton
6993f74a5b cifs: add refcounting to cifs_readdata structures
This isn't strictly necessary for the async readpages code, but the
uncached version will need to be able to collect the replies after
issuing the calls. Add a kref to cifs_readdata and use change the
code to take and put references appropriately.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
2012-05-16 20:13:30 -05:00
Jeff Layton
8d5ce4d23c cifs: abstract out function to marshal the iovec for readv receives
Cached and uncached reads will need to do different things here to
handle the difference when the pages are in pagecache and not. Abstract
out the function that marshals the page list into a kvec array.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
2012-05-16 20:13:29 -05:00
Jeff Layton
0471ca3fe4 cifs: make cifs_readdata_alloc take a work_func_t arg
We'll need different completion routines for an uncached read. Allow
the caller to set the one he needs at allocation time. Also, move
most of these functions to file.c so we can make more of them static.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
2012-05-16 20:13:29 -05:00
Jeff Layton
da82f7e755 cifs: convert cifs_iovec_write to use async writes
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Reviewed-by: Pavel Shilovsky <piastry@etersoft.ru>
2012-03-23 14:40:56 -04:00
Jeff Layton
e9492871fb cifs: abstract out function to marshal up the iovec array for async writes
We'll need to do something a bit different depending on the caller.
Abstract the code that marshals the page array into an iovec.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Reviewed-by: Pavel Shilovsky <piastry@etersoft.ru>
2012-03-23 14:40:56 -04:00
Jeff Layton
c2e8764009 cifs: allow caller to specify completion op when allocating writedata
We'll need a different set of write completion ops when not writing out
of the pagecache.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Reviewed-by: Pavel Shilovsky <piastry@etersoft.ru>
2012-03-23 14:40:55 -04:00
Jeff Layton
fe5f5d2e90 cifs: add pid field to cifs_writedata
We'll need this to handle rwpidforward option correctly when we use
async writes in the aio_write op.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Reviewed-by: Pavel Shilovsky <piastry@etersoft.ru>
2012-03-23 14:40:55 -04:00
Pavel Shilovsky
243d04b6e6 CIFS: Expand CurrentMid field
While in CIFS/SMB we have 16 bit mid, in SMB2 it is 64 bit.
Convert the existing field to 64 bit and mask off higher bits
for CIFS/SMB.

Signed-off-by: Pavel Shilovsky <piastry@etersoft.ru>
2012-03-23 14:28:03 -04:00
Pavel Shilovsky
5ffef7bf1d CIFS: Separate protocol-specific code from cifs_readv_receive code
Signed-off-by: Pavel Shilovsky <piastry@etersoft.ru>
2012-03-23 14:28:03 -04:00
Pavel Shilovsky
d4e4854fd1 CIFS: Separate protocol-specific code from demultiplex code
Signed-off-by: Pavel Shilovsky <piastry@etersoft.ru>
2012-03-23 14:28:02 -04:00
Pavel Shilovsky
792af7b05b CIFS: Separate protocol-specific code from transport routines
that lets us use this functions for SMB2.

Signed-off-by: Pavel Shilovsky <piastry@etersoft.ru>
2012-03-23 14:28:02 -04:00
Jeff Layton
815465c4d7 cifs: clean up call to cifs_dfs_release_automount_timer()
Take the #ifdef junk out of the code, and turn it into a noop macro
when CONFIG_CIFS_DFS_UPCALL isn't defined.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2012-03-21 11:55:44 -05:00
Pavel Shilovsky
2d86dbc970 CIFS: Introduce credit-based flow control
and send no more than credits value requests at once. For SMB/CIFS
it's trivial: increment this value by receiving any message and
decrement by sending one.

Reviewed-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Pavel Shilovsky <piastry@etersoft.ru>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2012-03-21 11:35:03 -05:00
Shirish Pargaonkar
9ef5992e44 cifs: Assume passwords are encoded according to iocharset (try #2)
Re-posting a patch originally posted by Oskar Liljeblad after
rebasing on 3.2.

Modify cifs to assume that the supplied password is encoded according
to iocharset.  Before this patch passwords would be treated as
raw 8-bit data, which made authentication with Unicode passwords impossible
(at least passwords with characters > 0xFF).

The previous code would as a side effect accept passwords encoded with
ISO 8859-1, since Unicode < 0x100 basically is ISO 8859-1.  Software which
relies on that will no longer support password chars > 0x7F unless it also
uses iocharset=iso8859-1.  (mount.cifs does not care about the encoding so
it will work as expected.)

Signed-off-by: Oskar Liljeblad <oskar@osk.mine.nu>
Signed-off-by: Shirish Pargaonkar <shirishpargaonkar@gmail.com>
Reviewed-by: Pavel Shilovsky <piastry@etersoft.ru>
Tested-by: A <nimbus1_03087@yahoo.com>
Signed-off-by: Steve French <smfrench@gmail.com>
2011-10-29 22:06:54 -05:00
Pavel Shilovsky
9ee305b70e CIFS: Send as many mandatory unlock ranges at once as possible
that reduces a traffic and increases a performance.

Signed-off-by: Pavel Shilovsky <piastry@etersoft.ru>
Acked-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <smfrench@gmail.com>
2011-10-24 13:11:52 -05:00
Pavel Shilovsky
4f6bcec910 CIFS: Implement caching mechanism for posix brlocks
to handle all lock requests on the client in an exclusive oplock case.

Signed-off-by: Pavel Shilovsky <piastry@etersoft.ru>
Acked-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <smfrench@gmail.com>
2011-10-24 12:29:27 -05:00
Jeff Layton
e28bc5b1fd cifs: add cifs_async_readv
...which will allow cifs to do an asynchronous read call to the server.
The caller will allocate and set up cifs_readdata for each READ_AND_X
call that should be issued on the wire. The pages passed in are added
to the pagecache, but not placed on the LRU list yet (as we need the
page->lru to keep the pages on the list in the readdata).

When cifsd identifies the mid, it will see that there is a special
receive handler for the call, and use that to receive the rest of the
frame. cifs_readv_receive will then marshal up a kvec array with
kmapped pages from the pagecache, which eliminates one copy of the
data. Once the data is received, the pages are added to the LRU list,
set uptodate, and unlocked.

Reviewed-and-Tested-by: Pavel Shilovsky <piastry@etersoft.ru>
Signed-off-by: Jeff Layton <jlayton@redhat.com>
2011-10-19 15:30:07 -04:00
Jeff Layton
44d22d846f cifs: add a callback function to receive the rest of the frame
In order to handle larger SMBs for readpages and other calls, we want
to be able to read into a preallocated set of buffers. Rather than
changing all of the existing code to preallocate buffers however, we
instead add a receive callback function to the MID.

cifsd will call this function once the mid_q_entry has been identified
in order to receive the rest of the SMB. If the mid can't be identified
or the receive pointer is unset, then the standard 3rd phase receive
function will be called.

Reviewed-and-Tested-by: Pavel Shilovsky <piastry@etersoft.ru>
Signed-off-by: Jeff Layton <jlayton@redhat.com>
2011-10-19 15:29:49 -04:00
Shirish Pargaonkar
a5ff376966 cifs: Call id to SID mapping functions to change owner/group (try #4 repost)
Now build security descriptor to change either owner or group at the
server.  Initially security descriptor was built to change only
(D)ACL, that functionality has been extended.

When either an Owner or a Group of a file object at the server is changed,
rest of security descriptor remains same (DACL etc.).

To set security descriptor, it is necessary to open that file
with permission bits of either WRITE_DAC if DACL is being modified or
WRITE_OWNER (Take Ownership) if Owner or Group is being changed.

It is the server that decides whether a set security descriptor with
either owner or group change succeeds or not.

Signed-off-by: Shirish Pargaonkar <shirishpargaonkar@gmail.com>
Signed-off-by: Steve French <smfrench@gmail.com>
2011-10-17 09:11:11 -05:00
Pavel Shilovsky
03776f4516 CIFS: Simplify byte range locking code
Split cifs_lock into several functions and let CIFSSMBLock get pid
as an argument.

Signed-off-by: Pavel Shilovsky <piastry@etersoft.ru>
Signed-off-by: Steve French <smfrench@gmail.com>
2011-10-13 17:16:28 -05:00
Shirish Pargaonkar
3d3ea8e64e cifs: Add mount options for backup intent (try #6)
Add mount options backupuid and backugid.

It allows an authenticated user to access files with the intent to back them
up including their ACLs, who may not have access permission but has
"Backup files and directories user right" on them (by virtue of being part
of the built-in group Backup Operators.

When mount options backupuid is specified, cifs client restricts the
use of backup intents to the user whose effective user id is specified
along with the mount option.

When mount options backupgid is specified, cifs client restricts the
use of backup intents to the users whose effective user id belongs to the
group id specified along with the mount option.

If an authenticated user is not part of the built-in group Backup Operators
at the server, access to such files is denied, even if allowed by the client.

Signed-off-by: Shirish Pargaonkar <shirishpargaonkar@gmail.com>
Reviewed-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <smfrench@gmail.com>
2011-10-12 23:42:17 -05:00
Jeff Layton
826a95e4a3 cifs: consolidate signature generating code
We have two versions of signature generating code. A vectorized and
non-vectorized version. Eliminate a large chunk of cut-and-paste
code by turning the non-vectorized version into a wrapper around the
vectorized one.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <smfrench@gmail.com>
2011-10-12 23:41:41 -05:00
Jeff Layton
04db79b015 cifs: factor smb_vol allocation out of cifs_setup_volume_info
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Reviewed-by: Pavel Shilovsky <piastryyy@gmail.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2011-07-08 03:51:23 +00:00
Jeff Layton
f9e59bcba2 cifs: have cifs_cleanup_volume_info not take a double pointer
...as that makes for a cumbersome interface. Make it take a regular
smb_vol pointer and rely on the caller to zero it out if needed.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Reviewed-by: Pavel Shilovsky <piastryyy@gmail.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2011-07-06 20:03:05 +00:00
Al Viro
2a9b99516c sanitize cifs_umount() prototype
a) superblock argument is unused
b) it always returns 0

Acked-by: Pavel Shilovsky <piastryyy@gmail.com>
Reviewed-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-06-24 18:39:42 -04:00
Al Viro
2c6292ae4b cifs: don't pass superblock to cifs_mount()
To close sget() races we'll need to be able to set cifs_sb up before
we get the superblock, so we'll want to be able to do cifs_mount()
earlier.  Fortunately, it's easy to do - setting ->s_maxbytes can
be done in cifs_read_super(), ditto for ->s_time_gran and as for
putting MS_POSIXACL into ->s_flags, we can mirror it in ->mnt_cifs_flags
until cifs_read_super() is called.  Kill unused 'devname' argument,
while we are at it...

Acked-by: Pavel Shilovsky <piastryyy@gmail.com>
Reviewed-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-06-24 18:39:41 -04:00
Steve French
96daf2b091 [CIFS] Rename three structures to avoid camel case
secMode to sec_mode
and
cifsTconInfo to cifs_tcon
and
cifsSesInfo to cifs_ses

Signed-off-by: Steve French <sfrench@us.ibm.com>
2011-05-27 04:34:02 +00:00
Pavel Shilovsky
d4ffff1fa9 CIFS: Add rwpidforward mount option
Add rwpidforward mount option that switches on a mode when we forward
pid of a process who opened a file to any read and write operation.

This can prevent applications like WINE from failing on read or write
operation on a previously locked file region from the same netfd from
another process if we use mandatory brlock style.

It is actual for WINE because during a run of WINE program two processes
work on the same netfd - share the same file struct between several VFS
fds:
1) WINE-server does open and lock;
2) WINE-application does read and write.

Signed-off-by: Pavel Shilovsky <piastry@etersoft.ru>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2011-05-27 03:57:16 +00:00
Steve French
f87d39d951 [CIFS] Migrate from prefixpath logic
Now we point superblock to a server share root and set a root dentry
appropriately. This let us share superblock between mounts like
//server/sharename/foo/bar and //server/sharename/foo further.

Reviewed-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Pavel Shilovsky <piastry@etersoft.ru>

Signed-off-by: Steve French <sfrench@us.ibm.com>
2011-05-27 03:50:55 +00:00
Pavel Shilovsky
fa2989f447 CIFS: Use pid saved from cifsFileInfo in writepages and set_file_size
We need it to make them work with mandatory locking style because
we can fail in a situation like when kernel need to flush dirty pages
and there is a lock held by a process who opened file.

Signed-off-by: Pavel Shilovsky <piastry@etersoft.ru>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2011-05-26 18:07:02 +00:00
Jeff Layton
c28c89fc43 cifs: add cifs_async_writev
Add the ability for CIFS to do an asynchronous write. The kernel will
set the frame up as it would for a "normal" SMBWrite2 request, and use
cifs_call_async to send it. The mid callback will then be configured to
handle the result.

Reviewed-by: Pavel Shilovsky <piastry@etersoft.ru>
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2011-05-25 20:38:33 +00:00
Pavel Shilovsky
724d9f1cfb CIFS: Simplify mount code for further shared sb capability
Reorganize code to get mount option at first and when get a superblock.
This lets us use shared superblock model further for equal mounts.

Signed-off-by: Pavel Shilovsky <piastry@etersoft.ru>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2011-05-24 03:07:42 +00:00
Jeff Layton
59ffd84141 cifs: add ignore_pend flag to cifs_call_async
The current code always ignores the max_pending limit. Have it instead
only optionally ignore the pending limit. For CIFSSMBEcho, we need to
ignore it to make sure they always can go out. For async reads, writes
and potentially other calls, we need to respect it.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2011-05-23 02:59:16 +00:00
Jeff Layton
fcc31cb6f1 cifs: make cifs_send_async take a kvec array
We'll need this for async writes, so convert the call to take a kvec
array. CIFSSMBEcho is changed to put a kvec on the stack and pass
in the SMB buffer using that.

Reviewed-by: Pavel Shilovsky <piastry@etersoft.ru>
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2011-05-23 02:58:26 +00:00
Jeff Layton
2c8f981d93 cifs: consolidate SendReceive response checks
Further consolidate the SendReceive code by moving the checks run over
the packet into a separate function that all the SendReceive variants
can call.

We can also eliminate the check for a receive_len that's too big or too
small. cifs_demultiplex_thread already checks that and disconnects the
socket if that occurs, while setting the midStatus to MALFORMED. It'll
never call this code if that's the case.

Finally do a little cleanup. Use "goto out" on errors so that the flow
of code in the normal case is more evident. Also switch the logErr
variable in map_smb_to_linux_error to a bool.

Reviewed-by: Pavel Shilovsky <piastry@etersoft.ru>
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2011-05-23 02:58:24 +00:00
Steve French
ceec1e0fae [CIFS] Remove sparse warning
Move extern for cifsConvertToUCS to different header to prevent following warning:

CHECK   fs/cifs/cifs_unicode.c
fs/cifs/cifs_unicode.c:267:1: warning: symbol 'cifsConvertToUCS' was not declared. Should it be static?

Signed-off-by: Steve French <sfrench@us.ibm.com>
Signed-off-by: Pavel Shilovsky <piastry@etersoft.ru>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2011-05-19 14:10:56 +00:00
Sean Finney
f14bcf71d1 cifs: Unconditionally copy mount options to superblock info
Previously mount options were copied and updated in the cifs_sb_info
struct only when CONFIG_CIFS_DFS_UPCALL was enabled.  Making this
information generally available allows us to remove a number of ifdefs,
extra function params, and temporary variables.

Reviewed-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Sean Finney <seanius@seanius.net>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2011-05-19 14:10:55 +00:00
Jeff Layton
820a803ffa cifs: keep BCC in little-endian format
This is the same patch as originally posted, just with some merge
conflicts fixed up...

Currently, the ByteCount is usually converted to host-endian on receive.
This is confusing however, as we need to keep two sets of routines for
accessing it, and keep track of when to use each routine. Munging
received packets like this also limits when the signature can be
calulated.

Simplify the code by keeping the received ByteCount in little-endian
format. This allows us to eliminate a set of routines for accessing it
and we can now drop the *_le suffixes from the accessor functions since
that's now implied.

While we're at it, switch all of the places that read the ByteCount
directly to use the get_bcc inline which should also clean up some
unaligned accesses.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2011-05-19 14:10:53 +00:00
Shirish Pargaonkar
4d79dba0e0 cifs: Add idmap key and related data structures and functions (try #17 repost)
Define (global) data structures to store ids, uids and gids, to which a
SID maps.  There are two separate trees, one for SID/uid and another one
for SID/gid.

A new type of key, cifs_idmap_key_type, is used.

Keys are instantiated and searched using credential of the root by
overriding and restoring the credentials of the caller requesting the key.

Id mapping functions are invoked under config option of cifs acl.

Signed-off-by: Shirish Pargaonkar <shirishpargaonkar@gmail.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2011-05-19 14:10:51 +00:00
Steve French
b73b9a4ba7 [CIFS] Allow to set extended attribute cifs_acl (try #2)
Allow setting cifs_acl on the server.
Pass on to the server the ACL blob generated by an application.
cifs is just a pass-through, it does not monitor or inspect the contents
of the blob, server decides whether to enforce/apply the ACL blob composed
by an application.
If setting of ACL is succeessful, mark the inode for revalidation.

Signed-off-by: Shirish Pargaonkar <shirishpargaonkar@gmail.com>
Acked-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2011-05-19 14:10:49 +00:00
Steve French
43988d7685 [CIFS] Use ecb des kernel crypto APIs instead of
local cifs functions (repost)

Using kernel crypto APIs for DES encryption during LM and NT hash generation
instead of local functions within cifs.
Source file smbdes.c is deleted sans four functions, one of which
uses ecb des functionality provided by kernel crypto APIs.

Remove function SMBOWFencrypt.

Add return codes to various functions such as calc_lanman_hash,
SMBencrypt, and SMBNTencrypt.  Includes fix noticed by Dan Carpenter.

Signed-off-by: Shirish Pargaonkar <shirishpargaonkar@gmail.com>
CC: Dan Carpenter <error27@gmail.com>
Acked-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2011-05-19 14:10:49 +00:00
Steve French
c52a95545c Don't compile in unused reparse point symlink code
Recent Windows versions now create symlinks more frequently
and they do use this "reparse point" symlink mechanism.  We can of course
do symlinks nicely to Samba and other servers which support the
CIFS Unix Extensions and we can also do SFU symlinks and "client only"
"MF" symlinks optionally, but for recent Windows we currently can not
handle the common "reparse point" symlinks fully, removing the caller
for this. We will need to extend and reenable this "reparse point" worker
code in cifs and fix cifs_symlink to call this.  In the interim this code
has been moved to its own config option so it is not compiled in by default
until cifs_symlink fixed up (and tested) to use this.

CC: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2011-05-19 14:10:48 +00:00
Steve French
0eff0e2677 Remove unused CIFSSMBNotify worker function
The CIFSSMBNotify worker is unused, pending changes to allow it to be called
via inotify, so move it into its own experimental config option so it does
not get built in, until the necessary VFS support is fixed.  It used to
be used in dnotify, but according to Jeff, inotify needs minor changes
before we can reenable this.

CC: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2011-05-19 14:10:47 +00:00
Shirish Pargaonkar
ee2c925850 cifs: More crypto cleanup (try #2)
Replaced md4 hashing function local to cifs module with kernel crypto APIs.
As a result, md4 hashing function and its supporting functions in
file md4.c are not needed anymore.

Cleaned up function declarations, removed forward function declarations,
and removed a header file that is being deleted from being included.

Verified that sec=ntlm/i, sec=ntlmv2/i, and sec=ntlmssp/i work correctly.

Signed-off-by: Shirish Pargaonkar <shirishpargaonkar@gmail.com>
Reviewed-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2011-01-27 19:58:13 +00:00
Pavel Shilovsky
72432ffcf5 CIFS: Implement cifs_strict_writev (try #4)
If we don't have Exclusive oplock we write a data to the server.
Also set invalidate_mapping flag on the inode if we wrote something
to the server. Add cifs_iovec_write to let the client write iovec
buffers through CIFSSMBWrite2.

Signed-off-by: Pavel Shilovsky <piastryyy@gmail.com>
Reviewed-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2011-01-25 19:30:13 +00:00
Jeff Layton
766fdbb57f cifs: add ability to send an echo request
Reviewed-by: Suresh Jayaraman <sjayaraman@suse.de>
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2011-01-20 17:46:44 +00:00
Jeff Layton
a6827c184e cifs: add cifs_call_async
Add a function that will send a request, and set up the mid for an
async reply.

Reviewed-by: Suresh Jayaraman <sjayaraman@suse.de>
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2011-01-20 17:46:04 +00:00
Pavel Shilovsky
12fed00de9 CIFS: Fix oplock break handling (try #2)
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>
2011-01-19 17:52:29 +00:00
Jeff Layton
7d161b7f41 cifs: allow calling cifs_build_path_to_root on incomplete cifs_sb
It's possible that cifs_mount will call cifs_build_path_to_root on a
newly instantiated cifs_sb. In that case, it's likely that the
master_tlink pointer has not yet been instantiated.

Fix this by having cifs_build_path_to_root take a cifsTconInfo pointer
as well, and have the caller pass that in.

Reported-and-Tested-by: Robbert Kouprie <robbert@exx.nl>
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2010-12-07 19:25:37 +00:00
Jeff Layton
79df1baeec cifs: fix use of CONFIG_CIFS_ACL
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>
2010-12-06 20:22:39 +00:00
Shirish Pargaonkar
fbeba8bb16 cifs: Handle extended attribute name cifs_acl to generate cifs acl blob (try #4)
Add extended attribute name system.cifs_acl

Get/generate cifs/ntfs acl blob and hand over to the invoker however
it wants to parse/process it under experimental configurable option CIFS_ACL.

Do not get CIFS/NTFS ACL for xattr for attribute system.posix_acl_access

Signed-off-by: Shirish Pargaonkar <shirishpargaonkar@gmail.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2010-11-30 05:49:24 +00:00
Shirish Pargaonkar
78415d2d30 cifs: Misc. cleanup in cifsacl handling [try #4]
Change the name of function mode_to_acl to mode_to_cifs_acl.

Handle return code in functions mode_to_cifs_acl and
cifs_acl_to_fattr.

Signed-off-by: Shirish Pargaonkar <shirishpargaonkar@gmail.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2010-11-30 05:49:17 +00:00
Shirish Pargaonkar
987b21d7d9 cifs: Percolate error up to the caller during get/set acls [try #4]
Modify get/set_cifs_acl* calls to reutrn error code and percolate the
error code up to the caller.

Signed-off-by: Shirish Pargaonkar <shirishpargaonkar@gmail.com>
Reviewed-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2010-11-11 03:54:36 +00:00
Pavel Shilovsky
c67236281c cifs: make cifs_set_oplock_level() take a cifsInodeInfo pointer
All the callers already have a pointer to struct cifsInodeInfo. Use it.

Signed-off-by: Suresh Jayaraman <sjayaraman@suse.de>
Signed-off-by: Pavel Shilovsky <piastryyy@gmail.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2010-11-05 17:39:01 +00:00
Pavel Shilovsky
e66673e39a CIFS: Add cifs_set_oplock_level
Simplify many places when we need to set oplock level on an inode.

Signed-off-by: Pavel Shilovsky <piastryyy@gmail.com>
Reviewed-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2010-11-02 18:40:54 +00:00
Shirish Pargaonkar
307fbd31b6 NTLM auth and sign - Use kernel crypto apis to calculate hashes and smb signatures
Use kernel crypto sync hash apis insetead of cifs crypto functions.
The calls typically corrospond one to one except that insead of
key init, setkey is used.

Use crypto apis to generate smb signagtures also.
Use hmac-md5 to genereate ntlmv2 hash, ntlmv2 response, and HMAC (CR1 of
ntlmv2 auth blob.
User crypto apis to genereate signature and to verify signature.
md5 hash is used to calculate signature.
Use secondary key to calculate signature in case of ntlmssp.

For ntlmv2 within ntlmssp, during signature calculation, only 16 bytes key
(a nonce) stored within session key is used. during smb signature calculation.
For ntlm and ntlmv2 without extended security, 16 bytes key
as well as entire response (24 bytes in case of ntlm and variable length
in case of ntlmv2) is used for smb signature calculation.
For kerberos, there is no distinction between key and response.

Acked-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Shirish Pargaonkar <shirishpargaonkar@gmail.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2010-10-26 18:38:06 +00:00
Shirish Pargaonkar
d2b915210b NTLM auth and sign - Define crypto hash functions and create and send keys needed for key exchange
Mark dependency on crypto modules in Kconfig.

Defining per structures sdesc and cifs_secmech which are used to store
crypto hash functions and contexts.  They are stored per smb connection
and used for all auth mechs to genereate hash values and signatures.

Allocate crypto hashing functions, security descriptiors, and respective
contexts when a smb/tcp connection is established.
Release them when a tcp/smb connection is taken down.

md5 and hmac-md5 are two crypto hashing functions that are used
throught the life of an smb/tcp connection by various functions that
calcualte signagure and ntlmv2 hash, HMAC etc.

structure ntlmssp_auth is defined as per smb connection.

ntlmssp_auth holds ciphertext which is genereated by rc4/arc4 encryption of
secondary key, a nonce using ntlmv2 session key and sent in the session key
field of the type 3 message sent by the client during ntlmssp
negotiation/exchange

A key is exchanged with the server if client indicates so in flags in
type 1 messsage and server agrees in flag in type 2 message of ntlmssp
negotiation.  If both client and agree, a key sent by client in
type 3 message of ntlmssp negotiation in the session key field.
The key is a ciphertext generated off of secondary key, a nonce, using
ntlmv2 hash via rc4/arc4.

Signing works for ntlmssp in this patch. The sequence number within
the server structure needs to be zero until session is established
i.e. till type 3 packet of ntlmssp exchange of a to be very first
smb session on that smb connection is sent.

Acked-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Shirish Pargaonkar <shirishpargaonkar@gmail.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2010-10-26 18:35:31 +00:00
Shirish Pargaonkar
21e733930b NTLM auth and sign - Allocate session key/client response dynamically
Start calculating 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 copy/make its
session key, session key of smb connection.  This key stays with
the smb connection throughout its life.
sequence_number within server is set to 0x2.

The authentication Message Authentication Key (mak) which consists
of session key followed by client response within structure session_key
is now dynamic.  Every authentication type allocates the key + response
sized memory within its session structure and later either assigns or
frees it once the client response is sent and if session's session key
becomes connetion's session key.

ntlm/ntlmi authentication functions are rearranged.  A function
named setup_ntlm_resp(), similar to setup_ntlmv2_resp(), replaces
function cifs_calculate_session_key().

size of CIFS_SESS_KEY_SIZE is changed to 16, to reflect the byte size
of the key it holds.

Reviewed-by: Jeff Layton <jlayton@samba.org>
Signed-off-by: Shirish Pargaonkar <shirishpargaonkar@gmail.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2010-10-26 18:20:10 +00:00
Steve French
7a16f1961a [CIFS] Fix minor checkpatch warning and update cifs version
Signed-off-by: Steve French <sfrench@us.ibm.com>
2010-10-18 01:09:48 +00:00
Jeff Layton
abfe1eedd6 cifs: eliminate the inode argument from cifs_new_fileinfo
It already takes a file pointer. The inode associated with that had damn
well better be the same one we're passing in anyway. Thus, there's no
need for a separate argument here.

Also, get rid of the bogus check for a null pCifsInode pointer. The
CIFS_I macro uses container_of(), and that will virtually never return a
NULL pointer anyway.

Finally, move the setting of the canCache* flags outside of the lock.
Other places in the code don't hold that lock when setting it, so I
assume it's not really needed here either.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Reviewed-by: Suresh Jayaraman <sjayaraman@suse.de>
Acked-by: Dave Kleikamp <shaggy@linux.vnet.ibm.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2010-10-18 01:04:16 +00:00
Jeff Layton
f6a53460e2 cifs: eliminate oflags option from cifs_new_fileinfo
Eliminate the poor, misunderstood "oflags" option from cifs_new_fileinfo.
The callers mostly pass in the filp->f_flags here.

That's not correct however since we're checking that value for
the presence of FMODE_READ. Luckily that only affects how the f_list is
ordered. What it really wants here is the file->f_mode. Just use that
field from the filp to determine it.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Reviewed-by: Suresh Jayaraman <sjayaraman@suse.de>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2010-10-18 00:34:35 +00:00
Jeff Layton
608712fe86 cifs: fix flags handling in cifs_posix_open
The way flags are passed and converted for cifs_posix_open is rather
non-sensical. Some callers call cifs_posix_convert_flags on the flags
before they pass them to cifs_posix_open, whereas some don't. Two flag
conversion steps is just confusing though.

Change the function instead to clearly expect input in f_flags format,
and fix the callers to pass that in. Then, have cifs_posix_open call
cifs_convert_posix_flags to do the conversion. Move cifs_posix_open to
file.c as well so we can keep cifs_convert_posix_flags as a static
function.

Fix it also to not ignore O_CREAT, O_EXCL and O_TRUNC, and instead have
cifs_reopen_file mask those bits off before calling cifs_posix_open.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Reviewed-by: Suresh Jayaraman <sjayaraman@suse.de>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2010-10-18 00:34:29 +00:00
Jeff Layton
d7c86ff8cd cifs: don't use vfsmount to pin superblock for oplock breaks
Filesystems aren't really supposed to do anything with a vfsmount. It's
considered a layering violation since vfsmounts are entirely managed at
the VFS layer.

CIFS currently keeps an active reference to a vfsmount in order to
prevent the superblock vanishing before an oplock break has completed.
What we really want to do instead is to keep sb->s_active high until the
oplock break has completed. This patch borrows the scheme that NFS uses
for handling sillyrenames.

An atomic_t is added to the cifs_sb_info. When it transitions from 0 to
1, an extra reference to the superblock is taken (by bumping the
s_active value). When it transitions from 1 to 0, that reference is
dropped and a the superblock teardown may proceed if there are no more
references to it.

Also, the vfsmount pointer is removed from cifsFileInfo and from
cifs_new_fileinfo, and some bogus forward declarations are removed from
cifsfs.h.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Reviewed-by: Suresh Jayaraman <sjayaraman@suse.de>
Acked-by: Dave Kleikamp <shaggy@linux.vnet.ibm.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2010-10-12 18:08:01 +00:00
Jeff Layton
6508d904e6 cifs: have find_readable/writable_file filter by fsuid
When we implement multiuser mounts, we'll need to filter filehandles
by fsuid. Add a flag for multiuser mounts and code to filter by
fsuid when it's set.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2010-10-06 16:12:59 +00:00
Jeff Layton
13cfb7334e cifs: have cifsFileInfo hold a reference to a tlink rather than tcon pointer
cifsFileInfo needs a pointer to a tcon, but it doesn't currently hold a
reference to it. Change it to keep a pointer to a tcon_link instead and
hold a reference to it.

That will keep the tcon from being freed until the file is closed.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2010-10-06 16:12:49 +00:00
Jeff Layton
f7a40689fd cifs: have cifs_new_fileinfo take a tcon arg
To minimize calls to cifs_sb_tcon and to allow for a clear error path if
a tcon can't be acquired.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2010-09-29 19:04:33 +00:00
Stefan Metzmacher
8bfb50a882 cifs: implement CIFSCouldBeMFSymlink() and CIFSCheckMFSymlink()
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2010-09-29 19:04:30 +00:00
Shirish Pargaonkar
2b149f1197 cifs NTLMv2/NTLMSSP ntlmv2 within ntlmssp autentication code
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>
2010-09-29 19:04:29 +00:00
Shirish Pargaonkar
5f98ca9afb cifs NTLMv2/NTLMSSP Change variable name mac_key to session key to reflect the key it holds
Change name of variable mac_key to session key.
The reason mac_key was changed to session key is, this structure does not
hold message authentication code, it holds the session key (for ntlmv2,
ntlmv1 etc.).  mac is generated as a signature in cifs_calc* functions.

Signed-off-by: Shirish Pargaonkar <shirishpargaonkar@gmail.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2010-09-29 19:04:29 +00:00
Suresh Jayaraman
aa91c7e4ab cifs: fix broken oplock handling
cifs_new_fileinfo() does not use the 'oplock' value from the callers. Instead,
it sets it to REQ_OPLOCK which seems wrong. We should be using the oplock value
obtained from the Server to set the inode's clientCanCacheAll or
clientCanCacheRead flags. Fix this by passing oplock from the callers to
cifs_new_fileinfo().

This change dates back to commit a6ce4932 (2.6.30-rc3). So, all the affected
versions will need this fix. Please Cc stable once reviewed and accepted.

Cc: Stable <stable@kernel.org>
Reviewed-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Suresh Jayaraman <sjayaraman@suse.de>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2010-09-29 19:04:28 +00:00
Jeff Layton
32670396e7 cifs: prevent possible memory corruption in cifs_demultiplex_thread
cifs_demultiplex_thread sets the addr.sockAddr.sin_port without any
regard for the socket family. While it may be that the error in question
here never occurs on an IPv6 socket, it's probably best to be safe and
set the port properly if it ever does.

Break the port setting code out of cifs_fill_sockaddr and into a new
function, and call that from cifs_demultiplex_thread.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2010-09-08 21:22:35 +00:00
Steve French
4266d9118f [CIFS] ntlmv2/ntlmssp remove-unused-function CalcNTLMv2_partial_mac_key
This function is not used, so remove the definition and declaration.

Reviewed-by: Jeff Layton <jlayton@samba.org>
Signed-off-by: Shirish Pargaonkar <shirishpargaonkar@gmail.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2010-09-08 21:17:29 +00:00
Steve French
c8e56f1f4f Revert "[CIFS] Fix ntlmv2 auth with ntlmssp"
This reverts commit 9fbc590860.

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>
2010-09-08 21:10:58 +00:00
Steve French
9fbc590860 [CIFS] Fix ntlmv2 auth with ntlmssp
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>
2010-08-20 20:42:26 +00:00
David Howells
67b7626a05 CIFS: Make cifs_convert_address() take a const src pointer and a length
Make cifs_convert_address() take a const src pointer and a length so that all
the strlen() calls in their can be cut out and to make it unnecessary to modify
the src string.

Also return the data length from dns_resolve_server_name_to_ip() so that a
strlen() can be cut out of cifs_compose_mount_options() too.

Acked-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2010-08-05 17:17:50 +00:00
Jeff Layton
50d971602a cifs: set the port in sockaddr in a more clearly defined fashion
This patch should replace the patch I sent a couple of weeks ago to
set the port in cifs_convert_address.

Currently we set this in cifs_find_tcp_session, but that's more of a
side effect than anything. Add a new function called cifs_fill_sockaddr.
Have it call cifs_convert_address and then set the port.

This also allows us to skip passing in the port as a separate parm to
cifs_find_tcp_session.

Also, change cifs_convert_address take a struct sockaddr * rather than
void * to make it clearer how this function should be called.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2010-08-02 12:40:34 +00:00
Jeff Layton
2422f676fb cifs: move cifs_new_fileinfo call out of cifs_posix_open
Having cifs_posix_open call cifs_new_fileinfo is problematic and
inconsistent with how "regular" opens work. It's also buggy as
cifs_reopen_file calls this function on a reconnect, which creates a new
struct cifsFileInfo that just gets leaked.

Push it out into the callers. This also allows us to get rid of the
"mnt" arg to cifs_posix_open.

Finally, in the event that a cifsFileInfo isn't or can't be created, we
always want to close the filehandle out on the server as the client
won't have a record of the filehandle and can't actually use it. Make
sure that CIFSSMBClose is called in those cases.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Reviewed-and-Tested-by: Suresh Jayaraman <sjayaraman@suse.de>
2010-06-16 13:40:16 -04:00
Jeff Layton
4065c802da cifs: fix noserverino handling when unix extensions are enabled
The uniqueid field sent by the server when unix extensions are enabled
is currently used sometimes when it shouldn't be. The readdir codepath
is correct, but most others are not. Fix it.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2010-05-17 20:59:21 +00:00
Jeff Layton
26efa0bac9 cifs: have decode_negTokenInit set flags in server struct
...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>
2010-05-05 23:24:11 +00:00
Jeff Layton
198b568278 cifs: break negotiate protocol calls out of cifs_setup_session
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>
2010-05-05 23:18:27 +00:00
Jeff Layton
ebe6aa5ac4 cifs: eliminate "first_time" parm to CIFS_SessSetup
We can use the is_first_ses_reconnect() function to determine this.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2010-04-28 00:36:17 +00:00
Steve French
fa588e0c57 [CIFS] Allow null nd (as nfs server uses) on create
While creating a file on a server which supports unix extensions
such as Samba, if a file is being created which does not supply
nameidata (i.e. nd is null), cifs client can oops when calling
cifs_posix_open.

Signed-off-by: Shirish Pargaonkar <shirishp@us.ibm.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2010-04-22 19:21:55 +00:00
Joe Perches
b6b38f704a [CIFS] Neaten cERROR and cFYI macros, reduce text space
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>
2010-04-21 03:50:45 +00:00
Jeff Layton
abab095d1f cifs: add cifs_revalidate_file
...to allow updating inode attributes on an existing inode by
filehandle. Change mmap and llseek codepaths to use that
instead of cifs_revalidate_dentry since they have a filehandle
readily available.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2010-03-09 20:22:53 +00:00
Jeff Layton
c8634fd311 cifs: add a CIFSSMBUnixQFileInfo function
...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>
2010-03-06 04:38:25 +00:00
Jeff Layton
bcd5357f43 cifs: add a CIFSSMBQFileInfo function
...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>
2010-03-06 04:38:02 +00:00
Jeff Layton
31c0519f7a cifs: merge CIFSSMBQueryEA with CIFSSMBQAllEAs
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>
2010-02-23 20:47:32 +00:00
Jeff Layton
ec06aedd44 cifs: clean up handling when server doesn't consistently support inode numbers
It's possible that a server will return a valid FileID when we query the
FILE_INTERNAL_INFO for the root inode, but then zeroed out inode numbers
when we do a FindFile with an infolevel of
SMB_FIND_FILE_ID_FULL_DIR_INFO.

In this situation turn off querying for server inode numbers, generate a
warning for the user and just generate an inode number using iunique.
Once we generate any inode number with iunique we can no longer use any
server inode numbers or we risk collisions, so ensure that we don't do
that in cifs_get_inode_info either.

Cc: Stable <stable@kernel.org>
Reported-by: Timothy Normand Miller <theosib@gmail.com>
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2009-11-06 22:04:37 +00:00
Jeff Layton
5d2c0e2259 cifs: fix problems with last two commits
Fix problems with commits:

086f68bd97
3bc303c254

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2009-09-25 02:12:33 +00:00
Jeff Layton
086f68bd97 cifs: eliminate cifs_init_private
...it does the same thing as cifs_fill_fileinfo, but doesn't handle the
flist ordering correctly. Also rename cifs_fill_fileinfo to a more
descriptive name and have it take an open flags arg instead of just a
write_only flag. That makes the logic in the callers a little simpler.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2009-09-24 19:35:18 +00:00
Jeff Layton
3bc303c254 cifs: convert oplock breaks to use slow_work facility (try #4)
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>
2009-09-24 18:33:18 +00:00
Jeff Layton
590a3fe0e1 cifs: fix oplock request handling in posix codepath
cifs_posix_open takes a "poplock" argument that's intended to be used in
the actual posix open call to set the "Flags" field. It ignores this
value however and declares an "oplock" parameter on the stack that it
passes uninitialized to the CIFSPOSIXOpen function. Not only does this
mean that the oplock request flags are bogus, but the result that's
expected to be in that variable is unchanged.

Fix this, and also clean up the type of the oplock parameter used. Since
it's expected to be __u32, we should use that everywhere and not
implicitly cast it from a signed type.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2009-09-15 19:45:03 +00:00
Jeff Layton
0b8f18e358 cifs: convert cifs_get_inode_info and non-posix readdir to use cifs_iget
cifs: convert cifs_get_inode_info and non-posix readdir to use cifs_iget

Rather than allocating an inode and filling it out, have
cifs_get_inode_info fill out a cifs_fattr and call cifs_iget. This means
a pretty hefty reorganization of cifs_get_inode_info.

For the readdir codepath, add a couple of new functions for filling out
cifs_fattr's from different FindFile response infolevels.

Finally, remove cifs_new_inode since there are no more callers.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2009-07-09 23:05:48 +00:00
Jeff Layton
3bbeeb3c93 cifs: add and use CIFSSMBUnixSetFileInfo for setattr calls
cifs: add and use CIFSSMBUnixSetFileInfo for setattr calls

When there's an open filehandle, SET_FILE_INFO is apparently preferred
over SET_PATH_INFO. Add a new variant that sets a FILE_UNIX_INFO_BASIC
infolevel via SET_FILE_INFO and switch cifs_setattr_unix to use the
new call when there's an open filehandle available.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2009-07-09 21:15:10 +00:00
Jeff Layton
01ea95e3b6 cifs: rename CIFSSMBUnixSetInfo to CIFSSMBUnixSetPathInfo
cifs: rename CIFSSMBUnixSetInfo to CIFSSMBUnixSetPathInfo

...in preparation of adding a SET_FILE_INFO variant.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2009-07-09 21:15:02 +00:00
Jeff Layton
cc0bad7552 cifs: add new cifs_iget function and convert unix codepath to use it
cifs: add new cifs_iget function and convert unix codepath to use it

In order to unify some codepaths, introduce a common cifs_fattr struct
for storing inode attributes. The different codepaths (unix, legacy,
normal, etc...) can fill out this struct with inode info. It can then be
passed as an arg to a common set of routines to get and update inodes.

Add a new cifs_iget function that uses iget5_locked to identify inodes.
This will compare inodes based on the uniqueid value in a cifs_fattr
struct.

Rather than filling out an already-created inode, have
cifs_get_inode_info_unix instead fill out cifs_fattr and hand that off
to cifs_iget. cifs_iget can then properly look for hardlinked inodes.

On the readdir side, add a new cifs_readdir_lookup function that spawns
populated dentries. Redefine FILE_UNIX_INFO so that it's basically a
FILE_UNIX_BASIC_INFO that has a few fields wrapped around it. This
allows us to more easily use the same function for filling out the fattr
as the non-readdir codepath.

With this, we should then have proper hardlink detection and can
eventually get rid of some nasty CIFS-specific hacks for handing them.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2009-07-01 21:26:42 +00:00
Jeff Layton
1e68b2b275 cifs: add new routine for converting AF_INET and AF_INET6 addrs
...to consolidate some logic used in more than one place.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2009-06-13 08:17:30 +00:00
Christoph Hellwig
1bf4072da6 cifs: reorganize get_cifs_acl
Thus spake Christoph:

"But this whole set_cifs_acl function is a real mess anyway and needs
some splitting up."

With this change too, it's possible to call acl_to_uid_mode() with a
NULL inode pointer. That (or something close to it) will eventually be
necessary when cifs_get_inode_info is reorganized.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Shirish Pargaonkar <shirishp@us.ibm.com>
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2009-05-28 17:08:02 +00:00
Jeff Layton
c4a2c08db7 cifs: make cnvrtDosUnixTm take a little-endian args and an offset
The callers primarily end up converting the args from le anyway. Also,
most of the callers end up needing to add an offset to the result. The
exception to these rules is cnvrtDosCifsTm, but there are no callers of
that function, so we might as well remove it.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2009-05-28 14:57:20 +00:00
Jeff Layton
07119a4df8 cifs: have cifs_NTtimeToUnix take a little-endian arg
...and just have the function call le64_to_cpu.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2009-05-28 14:32:31 +00:00
Jeff Layton
f58841666b cifs: change cifs_get_name_from_search_buf to use new unicode helper
...and remove cifs_convertUCSpath. There are no more callers. Also add a
#define for the buffer used in the readdir path so that we don't have so
many magic numbers floating around.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Acked-by: Suresh Jayaraman <sjayaraman@suse.de>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2009-04-30 15:45:01 +00:00
Jeff Layton
460b96960d cifs: change CIFSSMBUnixQuerySymLink to use new helpers
Change CIFSSMBUnixQuerySymLink to use the new unicode helper functions.
Also change the calling conventions so that the allocation of the target
name buffer is done in CIFSSMBUnixQuerySymLink rather than by the caller.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Acked-by: Suresh Jayaraman <sjayaraman@suse.de>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2009-04-30 15:45:00 +00:00
Steve French
c6c00919ab [CIFS] Rename compose_mount_options to cifs_compose_mount_options.
Make it available to others for reuse.

Signed-off-by: Igor Mammedov <niallain@gmail.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2009-03-18 05:50:07 +00:00
Steve French
7fc8f4e95b [CIFS] reopen file via newer posix open protocol operation if available
If the network connection crashes, and we have to reopen files, preferentially
use the newer cifs posix open protocol operation if the server supports it.

Signed-off-by: Steve French <sfrench@us.ibm.com>
2009-03-12 01:36:20 +00:00
Steve French
b298f22355 [CIFS] Send SMB flush in cifs_fsync
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>
2009-03-12 01:36:20 +00:00
Jeff Layton
44f68fadd8 cifs: posix fill in inode needed by posix open
function needed to prepare for posix open

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2009-02-21 03:37:08 +00:00
Jeff Layton
950ec52880 cifs: properly handle case where CIFSGetSrvInodeNumber fails
...if it does then we pass a pointer to an unintialized variable for
the inode number to cifs_new_inode. Have it pass a NULL pointer instead.

Also tweak the function prototypes to reduce the amount of casting.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2009-02-21 03:37:08 +00:00
Jeff Layton
132ac7b77c cifs: refactor new_inode() calls and inode initialization
Move new inode creation into a separate routine and refactor the
callers to take advantage of it.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2009-02-21 03:37:07 +00:00
Igor Mammedov
e4cce94c9c [CIFS] Prevent OOPs when mounting with remote prefixpath.
Fixes OOPs with message 'kernel BUG at fs/cifs/cifs_dfs_ref.c:274!'.
Checks if the prefixpath in an accesible while we are still in cifs_mount
and fails with reporting a error if we can't access the prefixpath

Should fix Samba bugs 6086 and 5861 and kernel bug 12192

Signed-off-by: Igor Mammedov <niallain@gmail.com>
Acked-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2009-02-21 03:36:21 +00:00
Jeff Layton
0496e02d87 cifs: turn smb_send into a wrapper around smb_sendv
cifs: turn smb_send into a wrapper around smb_sendv

Rename smb_send2 to smb_sendv to make it consistent with kernel naming
conventions for functions that take a vector.

There's no need to have 2 functions to handle sending SMB calls. Turn
smb_send into a wrapper around smb_sendv. This also allows us to
properly mark the socket as needing to be reconnected when there's a
partial send from smb_send.

Also, in practice we always use the address and noblocksnd flag
that's attached to the TCP_Server_Info. There's no need to pass
them in as separate args to smb_sendv.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Acked-by: Dave Kleikamp <shaggy@linux.vnet.ibm.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2009-01-29 03:32:12 +00:00
Linus Torvalds
54a696bd07 Merge git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6
* git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6: (31 commits)
  [CIFS] Remove redundant test
  [CIFS] make sure that DFS pathnames are properly formed
  Remove an already-checked error condition in SendReceiveBlockingLock
  Streamline SendReceiveBlockingLock: Use "goto out:" in an error condition
  Streamline SendReceiveBlockingLock: Use "goto out:" in an error condition
  [CIFS] Streamline SendReceive[2] by using "goto out:" in an error condition
  Slightly streamline SendReceive[2]
  Check the return value of cifs_sign_smb[2]
  [CIFS] Cleanup: Move the check for too large R/W requests
  [CIFS] Slightly simplify wait_for_free_request(), remove an unnecessary "else" branch
  Simplify allocate_mid() slightly: Remove some unnecessary "else" branches
  [CIFS] In SendReceive, move consistency check out of the mutexed region
  cifs: store password in tcon
  cifs: have calc_lanman_hash take more granular args
  cifs: zero out session password before freeing it
  cifs: fix wait_for_response to time out sleeping processes correctly
  [CIFS] Can not mount with prefixpath if root directory of share is inaccessible
  [CIFS] various minor cleanups pointed out by checkpatch script
  [CIFS] fix typo
  [CIFS] remove sparse warning
  ...

Fix trivial conflict in fs/cifs/cifs_fs_sb.h due to comment changes for
the CIFS_MOUNT_xyz bit definitions between cifs updates and security
updates.
2008-12-28 12:37:14 -08:00
Jeff Layton
4e53a3fb98 cifs: have calc_lanman_hash take more granular args
cifs: have calc_lanman_hash take more granular args

We need to use this routine to encrypt passwords associated with the
tcon too. Don't assume that the password will be attached to the
smb_session.

Also, make some of the values in the lower encryption functions
const since they aren't changed.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2008-12-26 02:29:11 +00:00
David Howells
a001e5b558 CRED: Wrap task credential accesses in the CIFS filesystem
Wrap access to task credentials so that they can be separated more easily from
the task_struct during the introduction of COW creds.

Change most current->(|e|s|fs)[ug]id to current_(|e|s|fs)[ug]id().

Change some task->e?[ug]id to task_e?[ug]id().  In some places it makes more
sense to use RCU directly rather than a convenient wrapper; these will be
addressed by later patches.

Signed-off-by: David Howells <dhowells@redhat.com>
Reviewed-by: James Morris <jmorris@namei.org>
Acked-by: Serge Hallyn <serue@us.ibm.com>
Cc: Steve French <sfrench@samba.org>
Cc: linux-cifs-client@lists.samba.org
Signed-off-by: James Morris <jmorris@namei.org>
2008-11-14 10:38:47 +11:00