This worker function is needed to send SMB2 fsctl
(and ioctl) requests including:

validating negotiation info (secure negotiate)
querying the servers network interfaces
copy offload (refcopy)

Followon patches for the above three will use this.
This patch also does general validation of the response.

In the future, as David Disseldorp notes, for the copychunk ioctl
case, we will want to enhance the response processing to allow
returning the chunk request limits to the caller (even
though the server returns an error, in that case we would
return data that the caller could use - see 2.2.32.1).

See MS-SMB2 Section 2.2.31 for more details on format of fsctl.
Acked-by: Pavel Shilovsky <piastry@etersoft.ru>
Signed-off-by: Steve French <smfrench@gmail.com>

In SMB2.1 and later the server will usually set the large MTU flag, and
we need to charge at least one credit, if server says that since
it supports multicredit.  Windows seems to let us get away with putting
a zero there, but they confirmed that it is wrong and the spec says
to put one there (if the request is under 64K and the CAP_LARGE_MTU
was returned during protocol negotiation by the server.

CC: Pavel Shilovsky <piastry@etersoft.ru>
Signed-off-by: Steve French <smfrench@gmail.com>

Cut and paste likely introduced accidentally inserted spurious #define
in d60622eb causes no harm but looks weird
Signed-off-by: Steve French <smfrench@gmail.com>

Acked-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <smfrench@gmail.com>

for NUL terminated string, need alway set '\0' in the end.
Signed-off-by: Zhao Hongjiang <zhaohongjiang@huawei.com>
Signed-off-by: Steve French <smfrench@gmail.com>

MS-SMB2 Section 2.2.31 lists fsctls.  Update our list of valid
cifs/smb2/smb3 fsctls and some related structs
based on more recent version of docs.  Additional detail on
less common ones can be found in MS-FSCC section 2.3.

CopyChunk (server side copy, ie refcopy) will depend on a few
of these
Signed-off-by: Steve French <smfrench@gmail.com>

More than 160 fixes since we last bumped the version number of cifs.ko.
Update to version 2.01 so it is easier in modinfo to tell
that fixes are in.
Signed-off-by: Steve French <smfrench@gmail.com>

SMB3 protocol adds various optional per-share capabilities (and
SMB3.02 adds one more beyond that).  Add ability to dump
(/proc/fs/cifs/DebugData) the share capabilities and share flags to
improve debugging.
Signed-off-by: Steve French <smfrench@gmail.com>
Acked-by: Jeff Layton <jlayton@redhat.com>

A few missing flags from SMB3.0 dialect, one missing from 2.1, and the
new #define flags for SMB3.02
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <smfrench@gmail.com>

The new Windows update supports SMB3.02 dialect, a minor update to SMB3.
This patch adds support for mounting with vers=3.02
Signed-off-by: Steve French <smfrench@gmail.com>
Reviewed-by: Jeff Layton <jlayton@redhat.com>

Fix minor endian error in Jeff's auth rewrite
Reviewed-by: Jeff Laytonn <jlayton@redhat.com>
Signed-off-by: Steve French <smfrench@gmail.com>

The SecurityFlags handler uses an obsolete simple_strtoul() call, and
doesn't really handle the bounds checking well. Fix it to use
kstrtouint() instead. Clean up the error messages as well and fix a
bogus check for an unsigned int to be less than 0.
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Reviewed-by: Pavel Shilovsky <piastry@etersoft.ru>
Signed-off-by: Steve French <smfrench@gmail.com>

Before this patchset, the global_secflags could only offer up a single
sectype. With the new set though we have the ability to allow different
sectypes since we sort out the one to use after talking to the server.

Change the global_secflags to allow NTLMSSP or NTLMv2 by default. If the
server sets the extended security bit in the Negotiate response, then
we'll use NTLMSSP. If it doesn't then we'll use raw NTLMv2. Mounting a
LANMAN server will still require a sec= option by default.
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Reviewed-by: Pavel Shilovsky <piastry@etersoft.ru>
Signed-off-by: Steve French <smfrench@gmail.com>

Now that we track what sort of NEGOTIATE response was received, stop
mandating that every session on a socket use the same type of auth.

Push that decision out into the session setup code, and make the sectype
a per-session property. This should allow us to mix multiple sectypes on
a socket as long as they are compatible with the NEGOTIATE response.

With this too, we can now eliminate the ses->secFlg field since that
info is redundant and harder to work with than a securityEnum.
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Acked-by: Pavel Shilovsky <piastry@etersoft.ru>
Signed-off-by: Steve French <smfrench@gmail.com>

Currently, we determine this according to flags in the sec_mode, flags
in the global_secflags and via other methods. That makes the semantics
very hard to follow and there are corner cases where we don't handle
this correctly.

Add a new bool to the TCP_Server_Info that acts as a simple flag to tell
us whether signing is enabled on this connection or not, and fix up the
places that need to determine this to use that flag.

This is a bit weird for the SMB2 case, where signing is per-session.
SMB2 needs work in this area already though. The existing SMB2 code has
similar logic to what we're using here, so there should be no real
change in behavior. These changes should make it easier to implement
per-session signing in the future though.
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Reviewed-by: Pavel Shilovsky <piastry@etersoft.ru>
Signed-off-by: Steve French <smfrench@gmail.com>

We have this to some degree already in secFlgs, but those get "or'ed" so
there's no way to know what the last option requested was. Add new fields
that will eventually supercede the secFlgs field in the cifs_ses.
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Reviewed-by: Pavel Shilovsky <piastry@etersoft.ru>
Signed-off-by: Steve French <smfrench@gmail.com>

Currently we have the overrideSecFlg field, but it's quite cumbersome
to work with. Add some new fields that will eventually supercede it.
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <smfrench@gmail.com>

Track what sort of NEGOTIATE response we get from the server, as that
will govern what sort of authentication types this socket will support.

There are three possibilities:

LANMAN: server sent legacy LANMAN-type response

UNENCAP: server sent a newer-style response, but extended security bit
wasn't set. This socket will only support unencapsulated auth types.

EXTENDED: server sent a newer-style response with the extended security
bit set. This is necessary to support krb5 and ntlmssp auth types.
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Reviewed-by: Pavel Shilovsky <piastry@etersoft.ru>
Signed-off-by: Steve French <smfrench@gmail.com>

Add a new securityEnum value to cover the case where a sec= option
was not explicitly set.
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Reviewed-by: Pavel Shilovsky <piastry@etersoft.ru>
Signed-off-by: Steve French <smfrench@gmail.com>

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

Move the sanity checks for signed connections into a separate function.
SMB2's was a cut-and-paste job from CIFS code, so we can make them use
the same function.
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Reviewed-by: Pavel Shilovsky <piastry@etersoft.ru>
Signed-off-by: Steve French <smfrench@gmail.com>

...this also gets rid of some #ifdef ugliness too.
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Acked-by: Pavel Shilovsky <piastry@etersoft.ru>
Signed-off-by: Steve French <sfrench@us.ibm.com>

...cleanup.
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Acked-by: Pavel Shilovsky <piastry@etersoft.ru>
Signed-off-by: Steve French <sfrench@us.ibm.com>

This field is completely unused:

CIFS_SES_W9X is completely unused. CIFS_SES_LANMAN and CIFS_SES_OS2
are set but never checked. CIFS_SES_NT4 is checked, but never set.
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Acked-by: Pavel Shilovsky <piastry@etersoft.ru>
Signed-off-by: Steve French <sfrench@us.ibm.com>

These look pretty cargo-culty to me, but let's be certain. Leave
them in place for now. Pop a WARN if it ever does happen. Also,
move to a more standard idiom for setting the "server" pointer.
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Reviewed-by: Pavel Shilovsky <piastry@etersoft.ru>
Signed-off-by: Steve French <sfrench@us.ibm.com>

...rc is always set to 0.
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Acked-by: Pavel Shilovsky <piastry@etersoft.ru>
Signed-off-by: Steve French <sfrench@us.ibm.com>

It turns out that CIFS_SESS_KEY_SIZE == CIFS_ENCPWD_SIZE, so this
memset doesn't do anything useful.
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Acked-by: Pavel Shilovsky <piastry@etersoft.ru>
Signed-off-by: Steve French <sfrench@us.ibm.com>

The field that held this was removed quite some time ago.
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Acked-by: Pavel Shilovsky <piastry@etersoft.ru>
Signed-off-by: Steve French <sfrench@us.ibm.com>

Some servers set max_vcs to 1 and actually do enforce that limit. Add a
new mount option to work around this behavior that forces a mount
request to open a new socket to the server instead of reusing an
existing one.

I'd prefer to come up with a solution that doesn't require this, so
consider this a debug patch that you can use to determine whether this
is the real problem.

Cc: Jim McDonough <jmcd@samba.org>
Cc: Steve French <smfrench@gmail.com>
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>

Fix new kernel-doc warning in fs/splice.c:

  Warning(fs/splice.c:1298): No description found for parameter 'opos'
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

Pull input subsystem updates from Dmitry Torokhov:
 "A few small fixups for cyttsp, wacom and xpad drivers"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input:
  Input: xpad - fix for "Mad Catz Street Fighter IV FightPad" controllers
  Input: wacom - add a new stylus (0x100802) for Intuos5 and Cintiqs
  Input: add missing dependencies on CONFIG_HAS_IOMEM
  Input: cyttsp - fix swapped mfg_stat and mfg_cmd registers
  Input: cyttsp - add missing handshake
  Input: cyttsp - fix memcpy size param

Pull ARM SoC fixes from Arnd Bergmann:
 "These are two fixes that came in this week, one for a regression we
  introduced in 3.10 in the GIC interrupt code, and the other one fixes
  a typo in newly introduced code"

* tag 'fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc:
  irqchip: gic: call gic_cpu_init() as well in CPU_STARTING_FROZEN case
  ARM: dts: Correct the base address of pinctrl_3 on Exynos5250

Merge tag 'driver-core-3.10-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core

Pull driver core fix from Greg Kroah-Hartman:
 "Here's a single patch for the firmware core that resolves a reported
  oops in the firmware core that people have been hitting."

* tag 'driver-core-3.10-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core:
  firmware loader: fix use-after-free by double abort

Pull USB fixes from Greg Kroah-Hartman:
 "Here are two USB patches for 3.10.

  One updates the Kconfig wording for CONFIG_USB_PHY to make it,
  hopefully, more obvious what this option is (I know you complained
  about this when it hit the tree.) The other is a new device id for a
  driver"

* tag 'usb-3.10-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb:
  USB: serial: ti_usb_3410_5052: new device id for Abbot strip port cable
  usb: phy: Improve Kconfig help for CONFIG_USB_PHY

Pul tty fixes from Greg Kroah-Hartman:
 "Here are two tty core fixes that resolve some regressions that have
  been reported recently.  Both tiny fixes, but needed"

* tag 'tty-3.10-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty:
  tty: Fix transient pty write() EIO
  tty/vt: Return EBUSY if deallocating VT1 and it is busy

Pull SCSI target fixes from Nicholas Bellinger:
 "Included is the recent tcm_qla2xxx residual underrun length fix from
  Roland, along with Joern's iscsi-target patch for session_lock
  breakage within iscsit_stop_time2retain_timer() code.  Both are CC'ed
  to stable.

  The remaining two are specific to recent iscsi-target + iser
  conversion changes.  One drops some left-over debug noise, and Andy's
  patch fixes configfs attribute handling during an explicit network
  portal feature bit disable when iser-target is unsupported."

* git://git.kernel.org/pub/scm/linux/kernel/git/nab/target-pending:
  iscsi-target: Remove left over v3.10-rc debug printks
  target/iscsi: Fix op=disable + error handling cases in np_store_iser
  tcm_qla2xxx: Fix residual for underrun commands that fail
  target/iscsi: don't corrupt bh_count in iscsit_stop_time2retain_timer()

Pull media fixes from Mauro Carvalho Chehab:
 "Another set of fixes for Kernel 3.10.

  This series contain:
   - two Kbuild fixes for randconfig
   - a buffer overflow when using rtl28xuu with r820t tuner
   - one clk fixup on exynos4-is driver"

* 'v4l_for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media:
  [media] Fix build when drivers are builtin and frontend modules
  [media] s5p makefiles: don't override other selections on obj-[ym]
  [media] exynos4-is: Fix FIMC-IS clocks initialization
  [media] rtl28xxu: fix buffer overflow when probing Rafael Micro r820t tuner

Pull vfs fixes from Al Viro:
 "Several fixes for bugs caught while looking through f_pos (ab)users"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
  aout32 coredump compat fix
  splice: don't pass the address of ->f_pos to methods
  mconsole: we'd better initialize pos before passing it to vfs_read()...

dump_seek() does SEEK_CUR, not SEEK_SET; native binfmt_aout
handles it correctly (seeks by PAGE_SIZE - sizeof(struct user),
getting the current position to PAGE_SIZE), compat one seeks
by PAGE_SIZE and ends up at PAGE_SIZE + already written...
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>