Commit Graph

612 Commits

Author SHA1 Message Date
Steve French
197c183f35 [CIFS] Forgot to add two new files from previous commit
Thanks to Igor for noticing this.
CC: Igor Mammedov <niallain@gmail.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2008-01-10 17:10:23 +00:00
Steve French
6103335de8 [CIFS] DNS name resolution helper upcall for cifs
Adds additional option CIFS_DFS_UPCALL to fs/Kconfig for enabling
        DFS support.  Resolved IP address is saved as a string in the
	key payload.

	Igor has a series of related patches that will follow which finish up
	CIFS DFS support

Acked-by: Igor Mammedov <niallain@gmail.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2008-01-09 16:21:36 +00:00
Steve French
f6d0998219 [CIFS] fix checkpatch warnings in fs/cifs/inode.c
Signed-off-by: Steve French <sfrench@us.ibm.com>
2008-01-08 23:18:22 +00:00
Steve French
88e7d705c4 [CIFS] hold ses sem on tcp session reconnect during mount
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2008-01-03 17:37:09 +00:00
Steve French
97837582bc [CIFS] Allow setting mode via cifs acl
Requires cifsacl mount flag to be on and CIFS_EXPERIMENTAL enabled

CC: Shirish Pargaonkar <shirishp@us.ibm.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-12-31 07:47:21 +00:00
Jeff Layton
28c5a02a11 [CIFS] fix unicode string alignment in SPNEGO setup
Unicode strings need to be word aligned, but the code that handles that
is currently not taking the length of the SPNEGO blob into account. Fix
it to do so.

Signed-off-by: Jeff Layton <jlayton@tupile.poochiereds.net>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-12-31 04:56:21 +00:00
Steve French
bb5a9a04d4 [CIFS] cifs_partialpagewrite() cleanup
rc cannot be -EBADF now and condition is always true

Signed-off-by: Vasily Averin <vvs@sw.ru>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-12-31 04:21:29 +00:00
Jeff Layton
1a67570c76 [CIFS] use krb5 session key from first SMB session after a NegProt
Currently, any new kerberos SMB session overwrites the server's session
key. The session key should only be set by the first SMB session set up
on the socket.

Signed-off-by: Jeff Layton <jlayton@tupile.poochiereds.net>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-12-31 04:03:02 +00:00
Jeff Layton
1d9a8852c3 [CIFS] redo existing session setup if needed in cifs_mount
When cifs_mount finds an existing SMB session that it can use for a new
mount, it does not check to see whether that session is in need of being
reconnected. An easy way to reproduce:

1) mount //server/share1
2) watch /proc/fs/cifs/DebugData for the share to go DISCONNECTED
3) mount //server/share2 with same creds as in step 1.

The second mount will fail because CIFSTCon returned -EAGAIN. If you do
an operation in share1 and then reattempt the mount it will work (since
the session is reestablished).

The following patch fixes this by having cifs_mount check the status
of the session when it picks an existing session and calling
cifs_setup_session on it again if it's in need of reconnection.

Thanks to Wojciech Pilorz for the initial bug report.

Signed-off-by: Jeff Layton <jlayton@tupile.poochiereds.net>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-12-31 01:37:11 +00:00
Jeff Layton
05b3de63da [CIFS] Only dump SPNEGO key if CONFIG_CIFS_DEBUG2 is set
The SPNEGO key data is not terribly interesting except in certain
debugging situations. Only dump it to the ring buffer if needed.

Signed-off-by: Jeff Layton <jlayton@tupile.poochiereds.net>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-12-31 00:51:45 +00:00
Steve French
dae5dbdbd7 [CIFS] fix SetEA failure to some Samba versions
Thanks to Oleg Gvozdev for noticing the problem.

CC: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-12-30 23:49:57 +00:00
Al Viro
9b5e6857b3 regression: cifs endianness bug
access_flags_to_mode() gets on-the-wire data (little-endian) and treats
it as host-endian.

Introduced in commit e01b640013 ("[CIFS]
enable get mode from ACL when cifsacl mount option specified")

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-12-05 09:25:19 -08:00
Steve French
2b83457bde [CIFS] Fix check after use error in ACL code
Spotted by the coverity scanner.

CC: Adrian Bunk <bunk@kernel.org>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-11-25 10:01:00 +00:00
Jeff Layton
cea218054a [CIFS] Fix potential data corruption when writing out cached dirty pages
Fix RedHat bug 329431

The idea here is separate "conscious" from "unconscious" flushes.
Conscious flushes are those due to a fsync() or close(). Unconscious
ones are flushes that occur as a side effect of some other operation or
due to memory pressure.

Currently, when an error occurs during an unconscious flush (ENOSPC or
EIO), we toss out the page and don't preserve that error to report to
the user when a conscious flush occurs. If after the unconscious flush,
there are no more dirty pages for the inode, the conscious flush will
simply return success even though there were previous errors when writing
out pages. This can lead to data corruption.

The easiest way to reproduce this is to mount up a CIFS share that's
very close to being full or where the user is very close to quota. mv
a file to the share that's slightly larger than the quota allows. The
writes will all succeed (since they go to pagecache). The mv will do a
setattr to set the new file's attributes. This calls
filemap_write_and_wait,
which will return an error since all of the pages can't be written out.
Then later, when the flush and release ops occur, there are no more
dirty pages in pagecache for the file and those operations return 0. mv
then assumes that the file was written out correctly and deletes the
original.

CIFS already has a write_behind_rc variable where it stores the results
from earlier flushes, but that value is only reported in cifs_close.
Since the VFS ignores the return value from the release operation, this
isn't helpful. We should be reporting this error during the flush
operation.

This patch does the following:

1) changes cifs_fsync to use filemap_write_and_wait and cifs_flush and also
sync to check its return code. If it returns successful, they then check
the value of write_behind_rc to see if an earlier flush had reported any
errors. If so, they return that error and clear write_behind_rc.

2) sets write_behind_rc in a few other places where pages are written
out as a side effect of other operations and the code waits on them.

3) changes cifs_setattr to only call filemap_write_and_wait for
ATTR_SIZE changes.

4) makes cifs_writepages accurately distinguish between EIO and ENOSPC
errors when writing out pages.

Some simple testing indicates that the patch works as expected and that
it fixes the reproduceable known problem.

Acked-by: Dave Kleikamp <shaggy@austin.rr.com>
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-11-20 23:19:03 +00:00
Petr Tesarik
2a97468024 [CIFS] Fix spurious reconnect on 2nd peek from read of SMB length
When retrying kernel_recvmsg() because of a short read, check returned
length against the remaining length, not against total length. This
avoids unneeded session reconnects which would otherwise occur when
kernel_recvmsg() finally returns zero when asked to read zero bytes.

Signed-off-by: Petr Tesarik <ptesarik@suse.cz>
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-11-20 02:24:08 +00:00
Steve French
f7a44eadd5 [CIFS] remove build warning
CC: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-11-17 00:01:51 +00:00
Steve French
2442421b17 [CIFS] Have CIFS_SessSetup build correct SPNEGO SessionSetup request
Have CIFS_SessSetup call cifs_get_spnego_key when Kerberos is
negotiated. Use the info in the key payload to build a session
setup request packet. Also clean up how the request buffer in
the function is freed on error.

With appropriate user space helper (in samba/source/client). Kerberos
support (secure session establishment can be done now via Kerberos,
previously users would have to use NTLMv2 instead for more secure
session setup).

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-11-16 23:37:35 +00:00
Steve French
8840dee9dc [CIFS] minor checkpatch cleanup
Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-11-16 23:05:52 +00:00
Jeff Layton
d6c2e4d02b [CIFS] have cifs_get_spnego_key get the hostname from TCP_Server_Info
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-11-16 22:23:17 +00:00
Jeff Layton
c359cf3c61 [CIFS] add hostname field to TCP_Server_Info struct
...and populate it with the hostname portion of the UNC string.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-11-16 22:22:06 +00:00
Jeff Layton
70fe7dc055 [CIFS] clean up error handling in cifs_mount
Move all of the kfree's sprinkled in the middle of the function to the
end, and have the code set rc and just goto there on error. Also zero
out the password string before freeing it. Looks like this should also
fix a potential memory leak of the prepath string if an error occurs
near the end of the function.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-11-16 22:21:07 +00:00
Steve French
68bf728a22 [CIFS] add ver= prefix to upcall format version
Acked-by: Jeff Layton <jlayton@redhat.com>
Acked-by: Igor Mammedov <niallan@gmail.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-11-16 18:32:52 +00:00
Steve French
133672efbc [CIFS] Fix buffer overflow if server sends corrupt response to small
request

In SendReceive() function in transport.c - it memcpy's
message payload into a buffer passed via out_buf param. The function
assumes that all buffers are of size (CIFSMaxBufSize +
MAX_CIFS_HDR_SIZE) , unfortunately it is also called with smaller
(MAX_CIFS_SMALL_BUFFER_SIZE) buffers.  There are eight callers
(SMB worker functions) which are primarily affected by this change:

TreeDisconnect, uLogoff, Close, findClose, SetFileSize, SetFileTimes,
Lock and PosixLock

CC: Dave Kleikamp <shaggy@austin.ibm.com>
CC: Przemyslaw Wegrzyn <czajnik@czajsoft.pl>
Acked-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-11-13 22:41:37 +00:00
Trond Myklebust
91cf45f02a [NET]: Add the helper kernel_sock_shutdown()
...and fix a couple of bugs in the NBD, CIFS and OCFS2 socket handlers.

Looking at the sock->op->shutdown() handlers, it looks as if all of them
take a SHUT_RD/SHUT_WR/SHUT_RDWR argument instead of the
RCV_SHUTDOWN/SEND_SHUTDOWN arguments.
Add a helper, and then define the SHUT_* enum to ensure that kernel users
of shutdown() don't get confused.

Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Acked-by: Mark Fasheh <mark.fasheh@oracle.com>
Acked-by: David Howells <dhowells@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
2007-11-12 18:10:39 -08:00
Linus Torvalds
46015977e7 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: (21 commits)
  [CIFS] fix oops on second mount to same server when null auth is used
  [CIFS] Fix stale mode after readdir when cifsacl specified
  [CIFS] add mode to acl conversion helper function
  [CIFS] Fix incorrect mode when ACL had deny access control entries
  [CIFS] Add uid to key description so krb can handle user mounts
  [CIFS] Fix walking out end of cifs dacl
  [CIFS] Add upcall files for cifs to use spnego/kerberos
  [CIFS] add OIDs for KRB5 and MSKRB5 to ASN1 parsing routines
  [CIFS] Register and unregister cifs_spnego_key_type on module init/exit
  [CIFS] implement upcalls for SPNEGO blob via keyctl API
  [CIFS] allow cifs_calc_signature2 to deal with a zero length iovec
  [CIFS] If no Access Control Entries, set mode perm bits to zero
  [CIFS] when mount helper missing fix slash wrong direction in share
  [CIFS] Don't request too much permission when reading an ACL
  [CIFS] enable get mode from ACL when cifsacl mount option specified
  [CIFS] ACL support part 8
  [CIFS] acl support part 7
  [CIFS] acl support part 6
  [CIFS] acl support part 6
  [CIFS] remove unused funtion compile warning when experimental off
  ...
2007-11-12 11:11:39 -08:00
Jeff Layton
9b8f5f5737 [CIFS] fix oops on second mount to same server when null auth is used
When a share is mounted using no username, cifs_mount sets
volume_info.username as a NULL pointer, and the sesInfo userName as an
empty string. The volume_info.username is passed to a couple of other
functions to see if there is an existing unc or tcp connection that can
be used. These functions assume that the username will be a valid
string that can be passed to strncmp. If the pointer is NULL, then the
kernel will oops if there's an existing session to which the string
can be compared.

This patch changes cifs_mount to set volume_info.username to an empty
string in this situation, which prevents the oops and should make it
so that the comparison to other null auth sessions match.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-11-09 23:25:04 +00:00
Steve French
a6f8de3d9b [CIFS] Fix stale mode after readdir when cifsacl specified
When mounted with cifsacl mount option, readdir can not
instantiate the inode with the estimated mode based on the ACL
for each file since we have not queried for the ACL for
each of these files yet.  So set the refresh time to zero
for these inodes so that the next stat will cause the client
to go to the server for the ACL info so we can build the estimated
mode (this means we also will issue an extra QueryPathInfo if
the stat happens within 1 second, but this is trivial compared to
the time required to open/getacl/close for each).

ls -l is slower when cifsacl mount option is specified, but
displays correct mode information.

Signed-off-by: Shirish Pargaonkar <shirishp@us.ibm.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-11-08 23:10:32 +00:00
Steve French
ce06c9f025 [CIFS] add mode to acl conversion helper function
Acked-by: Shirish Pargaonkar <shirishp@us.ibm.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-11-08 21:12:01 +00:00
Steve French
15b0395911 [CIFS] Fix incorrect mode when ACL had deny access control entries
When mounted with the cifsacl mount option, we were
treating any deny ACEs found like allow ACEs and it turns out for
SFU and SUA Windows set these type of access control entries often.
The order of ACEs is important too.  The canonical order that most
ACL tools and Windows explorer consruct ACLs with is to begin with
DENY entries then follow with ALLOW, otherwise an allow entry
could be encountered first, making the subsequent deny entry like "dead
code which would be superflous since Windows stops when a match is
made for the operation you are trying to perform for your user

We start with no permissions in the mode and build up as we find
permissions (ie allow ACEs).  This fixes deny ACEs so they affect
the mask used to set the subsequent allow ACEs.

Acked-by: Shirish Pargaonkar <shirishp@us.ibm.com>
CC: Alexander Bokovoy <ab@samba.org>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-11-08 17:57:40 +00:00
Igor Mammedov
9eae8a8903 [CIFS] Add uid to key description so krb can handle user mounts
Adds uid to key description fro supporting user mounts
and minor formating changes

Acked-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Igor Mammedov <niallain@gmail.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-11-08 16:13:31 +00:00
Steve French
63d2583f5a [CIFS] Fix walking out end of cifs dacl
Acked-by: Shirish Pargaonkar <shirishp@us.ibm.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-11-05 21:46:10 +00:00
Steve French
f1d662a7d5 [CIFS] Add upcall files for cifs to use spnego/kerberos
Acked-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-11-05 14:38:08 +00:00
Jeff Layton
e545937a51 [CIFS] add OIDs for KRB5 and MSKRB5 to ASN1 parsing routines
Also, fix the parser to recognize them and set the secType
accordingly. Make CIFSSMBNegotiate not error out automatically
after parsing the securityBlob.

Also thanks to Q (Igor) and Simo for their help on this
set of kerberos patches (and Dave Howells for help on the
upcall).

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-11-03 05:11:06 +00:00
Jeff Layton
84a15b9354 [CIFS] Register and unregister cifs_spnego_key_type on module init/exit
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-11-03 05:02:24 +00:00
Jeff Layton
09fe7ba78d [CIFS] implement upcalls for SPNEGO blob via keyctl API
Add routines to handle upcalls to userspace via keyctl for the purpose
of getting a SPNEGO blob for a particular uid and server combination.

Clean up the Makefile a bit and set it up to only compile cifs_spnego
if CONFIG_CIFS_UPCALL is set. Also change CONFIG_CIFS_UPCALL to depend
on CONFIG_KEYS rather than CONFIG_CONNECTOR.

cifs_spnego.h defines the communications between kernel and userspace
and is intended to be shared with userspace programs.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-11-03 04:48:29 +00:00
Jeff Layton
745542e210 [CIFS] allow cifs_calc_signature2 to deal with a zero length iovec
Currently, cifs_calc_signature2 errors out if it gets a zero-length
iovec. Fix it to silently continue in that case.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-11-03 04:34:04 +00:00
Steve French
7505e0525c [CIFS] If no Access Control Entries, set mode perm bits to zero
Also clean up ACL code

Acked-by: Shirish Pargaonkar <shirishp@us.ibm.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-11-01 18:03:01 +00:00
Steve French
1fb64bfc45 [CIFS] when mount helper missing fix slash wrong direction in share
Kernel bugzilla bug #9228

If mount helper (mount.cifs) missing, mounts with form like
//10.11.12.13/c$ would not work (only mounts with slash e.g.
//10.11.12.13\\c$ would work) due to problem with slash supposed
to be converted to backslash by the mount helper (which is not
there).

If we fail on converting an IPv4 address in in4_pton then
try to canonicalize the first slash (ie between sharename
and host ip address) if necessary.  If we have to retry
to check for IPv6 address the slash is already converted
if necessary.

Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-11-01 02:12:10 +00:00
Steve French
953f868138 [CIFS] Don't request too much permission when reading an ACL
We were requesting GENERIC_READ but that fails when  we do not have
read permission on the file (even if we could read the ACL).

Also move the dump access control entry code into debug ifdef.

Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-10-31 04:54:42 +00:00
Shirish Pargaonkar
e01b640013 [CIFS] enable get mode from ACL when cifsacl mount option specified
Part 9 of ACL patch series.  getting mode from ACL now works in
some cases (and requires CIFS_EXPERIMENTAL config option).

Signed-off-by: Shirish Pargaonkar <shirishp@us.ibm.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-10-30 04:45:14 +00:00
Steve French
b9c7a2bb1e [CIFS] ACL support part 8
Now GetACL in getinodeinfo path when cifsacl mount option used, and
ACL is parsed for SIDs.  Missing only one piece now to be able
to retrieve the mode

Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-10-26 23:40:20 +00:00
Steve French
d61e5808d9 [CIFS] acl support part 7
Also fixes typo, build break

Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-10-26 04:32:43 +00:00
Steve French
630f3f0c45 [CIFS] acl support part 6
Acked-by: Shirish Pargaonkar <shirishp@us.ibm.com>
CC: Cyrill Gorcunov <gorcunov@gmail.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-10-25 21:17:17 +00:00
Steve French
44093ca2fe [CIFS] acl support part 6
CC: Shirish Pargaonkar <shirishp@us.ibm.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-10-23 21:22:55 +00:00
Parag Warudkar
c94897790e [CIFS] remove unused funtion compile warning when experimental off
get rid of couple of unused function warnings which
show up when CONFIG_CIFS_EXPERIMENTAL is not defined - wrap them in
#ifdef CONFIG_CIFS_EXPERIMENTAL. Patch against current git.

Signed-off-by: Parag Warudkar <kernel-stuff@comcast.net>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-10-23 18:09:48 +00:00
Christoph Hellwig
3965516440 exportfs: make struct export_operations const
Now that nfsd has stopped writing to the find_exported_dentry member we an
mark the export_operations const

Signed-off-by: Christoph Hellwig <hch@lst.de>
Cc: Neil Brown <neilb@suse.de>
Cc: "J. Bruce Fields" <bfields@fieldses.org>
Cc: <linux-ext4@vger.kernel.org>
Cc: Dave Kleikamp <shaggy@austin.ibm.com>
Cc: Anton Altaparmakov <aia21@cantab.net>
Cc: David Chinner <dgc@sgi.com>
Cc: Timothy Shimmin <tes@sgi.com>
Cc: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
Cc: Hugh Dickins <hugh@veritas.com>
Cc: Chris Mason <mason@suse.com>
Cc: Jeff Mahoney <jeffm@suse.com>
Cc: "Vladimir V. Saveliev" <vs@namesys.com>
Cc: Steven Whitehouse <swhiteho@redhat.com>
Cc: Mark Fasheh <mark.fasheh@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-10-22 08:13:21 -07:00
Steve French
4879b44829 [CIFS] ACL support part 5
Acked-by: Shirish Pargaonkar <shirishp@us.ibm.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-10-19 21:57:39 +00:00
Linus Torvalds
2843483d2e 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: (51 commits)
  [CIFS] log better errors on failed mounts
  [CIFS] Return better error when server requires signing but client forbids
  [CIFS] fix typo
  [CIFS] acl support part 4
  [CIFS] Fix minor problems noticed by scan
  [CIFS] fix bad handling of EAGAIN error on kernel_recvmsg in cifs_demultiplex_thread
  [CIFS] build break
  [CIFS] endian fixes
  [CIFS] endian fixes in new acl code
  [CIFS] Fix some endianness problems in new acl code
  [CIFS] missing #endif from a previous patch
  [CIFS] formatting fixes
  [CIFS] Break up unicode_sessetup string functions
  [CIFS] parse server_GUID in SPNEGO negProt response
  [CIFS]
  [CIFS] Fix endian conversion problem in posix mkdir
  [CIFS] fix build break when lanman not enabled
  [CIFS] remove two sparse warnings
  [CIFS] remove compile warnings when debug disabled
  [CIFS] CIFS ACL support part 3
  ...
2007-10-19 12:00:58 -07:00
Pavel Emelyanov
ba25f9dcc4 Use helpers to obtain task pid in printks
The task_struct->pid member is going to be deprecated, so start
using the helpers (task_pid_nr/task_pid_vnr/task_pid_nr_ns) in
the kernel.

The first thing to start with is the pid, printed to dmesg - in
this case we may safely use task_pid_nr(). Besides, printks produce
more (much more) than a half of all the explicit pid usage.

[akpm@linux-foundation.org: git-drm went and changed lots of stuff]
Signed-off-by: Pavel Emelyanov <xemul@openvz.org>
Cc: Dave Airlie <airlied@linux.ie>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-10-19 11:53:43 -07:00
Steve French
a761ac579b [CIFS] log better errors on failed mounts
Also returns more accurate errors to mount for the cases of
account expired and password expired

Acked-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-10-18 21:45:27 +00:00
Jeff Layton
d32c4f2626 CIFS: ignore mode change if it's just for clearing setuid/setgid bits
If the ATTR_KILL_S*ID bits are set then any mode change is only for clearing
the setuid/setgid bits.  For CIFS, skip the mode change and let the server
handle it.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Cc: Steven French <sfrench@us.ibm.com>
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-10-18 14:37:22 -07:00
Steve French
abb63d6c3d [CIFS] Return better error when server requires signing but client forbids
Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-10-18 02:58:40 +00:00
Steve French
d628ddb62d [CIFS] fix typo
Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-10-17 23:06:07 +00:00
Steve French
a750e77c21 [CIFS] acl support part 4
Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-10-17 22:50:39 +00:00
Steve French
d5d1850109 [CIFS] Fix minor problems noticed by scan
Coverity scan pointed out some minor possible errors.

Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-10-17 21:31:52 +00:00
Steve French
c18c732ec6 [CIFS] fix bad handling of EAGAIN error on kernel_recvmsg in cifs_demultiplex_thread
When kernel_recvmsg returns -EAGAIN or -ERESTARTSYS, then
cifs_demultiplex_thread sleeps for a bit and then tries the read again.
When it does this, it's not zeroing out the length and that throws off
the value of total_read. Fix it to zero out the length.

Can cause memory corruption:
If kernel_recvmsg returns an error and total_read is a large enough
value, then we'll end up going through the loop again. total_read will
be a bogus value, as will (pdu_length-total_read). When this happens we
end up calling kernel_recvmsg with a bogus value (possibly larger than
the current iov_len).

At that point, memcpy_toiovec can overrun iov. It will start walking
up the stack, casting other things that are there to struct iovecs
(since it assumes that it's been passed an array of them). Any pointer
on the stack at an address above the kvec is a candidate for corruption
here.

Many thanks to Ulrich Obergfell for pointing this out.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-10-17 18:01:11 +00:00
Christoph Lameter
4ba9b9d0ba Slab API: remove useless ctor parameter and reorder parameters
Slab constructors currently have a flags parameter that is never used.  And
the order of the arguments is opposite to other slab functions.  The object
pointer is placed before the kmem_cache pointer.

Convert

        ctor(void *object, struct kmem_cache *s, unsigned long flags)

to

        ctor(struct kmem_cache *s, void *object)

throughout the kernel

[akpm@linux-foundation.org: coupla fixes]
Signed-off-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-10-17 08:42:45 -07:00
Steve French
adddd49ddf [CIFS] build break
Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-10-17 02:48:17 +00:00
Steve French
adbc03587c [CIFS] endian fixes
Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-10-17 02:12:46 +00:00
Dave Kleikamp
ce51ae14ae [CIFS] endian fixes in new acl code
Signed-off-by: Dave Kleikamp <shaggy@austin.ibm.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-10-16 21:35:39 +00:00
Steve French
af6f4612fd [CIFS] Fix some endianness problems in new acl code
Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-10-16 18:40:37 +00:00
Steve French
016ec75f1a [CIFS] missing #endif from a previous patch
Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-10-16 18:10:10 +00:00
Cyrill Gorcunov
6345a3a880 [CIFS] formatting fixes
Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-10-16 17:57:55 +00:00
Jeff Layton
0d3a01fada [CIFS] Break up unicode_sessetup string functions
SPNEGO setup needs only some of these strings. Break up
unicode_ssetup_strings so we can call them individually.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-10-16 17:32:19 +00:00
Jeff Layton
e187e44eb8 [CIFS] parse server_GUID in SPNEGO negProt response
SPNEGO NegProt response also contains a server_GUID. Parse it as we
would for RawNTLMSSP.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-10-16 17:10:44 +00:00
Jeff Layton
7111d2144f [CIFS]
[CIFS] fix error message about packet signing

When packet signing is disabled and the server requires it, cifs prints
an error message. The current message refers to a file in /proc that no
longer exists. Fix it to refer to the correct file.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-10-16 16:50:25 +00:00
Cyril Gorcunov
8f2376adfb [CIFS] Fix endian conversion problem in posix mkdir
Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-10-14 17:58:43 +00:00
Steve French
516897a208 [CIFS] fix build break when lanman not enabled
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-10-12 19:24:06 +00:00
Steve French
2c2130e16f [CIFS] remove two sparse warnings
Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-10-12 19:10:28 +00:00
Steve French
8f18c1316b [CIFS] remove compile warnings when debug disabled
Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-10-12 18:54:12 +00:00
Steve French
297647c21f [CIFS] CIFS ACL support part 3
Signed-off-by: Shirish Pargaonkar <shirishp@us.ibm.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-10-12 04:11:59 +00:00
Steve French
a013689ddb [CIFS] Fix cifsd so shuts down when signing fails during mount
Fixes two problems:
1) we dropped down to negotiating lanman if we did not recognize the
mechanism (krb5 e.g.)
2) we did not stop cifsd (thus will fail when doing rmod cifs with
slab free errors) when we fail tcon but have a bad session (which is
the case in which signing is required but we don't allow signing on
the client)

It also turns on extended security flag in the header when passing
"sec=krb5" on mount command (although kerberos support is not done of
course)

Acked-by: Jeff Layton <jlayton@redhat.com>
CC: Shaggy <shaggy@us.ibm.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-10-04 20:05:09 +00:00
Steve French
d12fd121af [CIFS] Cleanup formatting
Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-10-03 19:43:19 +00:00
Shirish Pargaonkar
d0d66c443a [CIFS] CIFS ACL support (part 2)
Signed-off-by: Shirish Pargaonkar <shirishp@us.ibm.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-10-03 18:22:19 +00:00
Mariusz Kozlowski
a8a11d399f [CIFS] remove some redundant argument checks
This patch does kmalloc + memset conversion to kzalloc and removes some
redundant argument checks.

Signed-off-by: Mariusz Kozlowski <m.kozlowski@tuxland.pl>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-10-03 16:41:24 +00:00
Steve French
9b22b0b726 [CIFS] Reduce chance of list corruption in find_writable_file
When find_writable_file is racing with close and the session
to the server goes down, Shaggy noticed that there was a
chance that an open file in the list of files off the inode
could have been freed by close since cifs_reconnect can
block (the spinlock thus not held). This means that
we have to start over at the beginning of the list in some
cases.

There is a 2nd change that needs to be made later
(pointed out by Jeremy Allison and Shaggy) in order to
prevent cifs_close ever freeing the cifs per file info
when a write is pending.  Although we delay close from
freeing this memory for sufficiently long for all known
cases, ultimately on a very, very slow write
overlapping a close pending we need to allow close to return
(without freeing the cifs file info) and defer freeing the
memory to be the responsibility of the (sloooow) write
thread (presumably have to look at every place wrtPending
is decremented - and add a flag for deferred free for
after wrtPending goes to zero).

Acked-by: Shaggy <shaggy@us.ibm.com>
Acked-by: Shirish Pargaonkar <shirishp@us.ibm.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-10-02 01:11:08 +00:00
Steve French
4084973dba [CIFS] change misleading field name
num_auth is really num_subauth in ACL terminology

Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-10-01 19:59:01 +00:00
Steve French
92ad9b93cd [CIFS] named pipe support (part 2)
Also fixes typo which could cause build break

Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-09-29 05:21:58 +00:00
Steve French
7f8ed420f8 [CIFS] CIFS support for named pipes (part 1)
This allows cifs to mount to ipc shares (IPC$)
which will allow user space applications to
layer over authenticated cifs connections
(useful for Wine and others that would want
to put DCE/RPC over CIFS or run CIFS named
pipes)

Acked-by: Rob Shearman <rob@codeweavers.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-09-28 22:28:55 +00:00
Steve French
407f61a2b4 [CIFS] Fix memory leak in statfs to very old servers
We were allocating request buffers twice in the statfs
path when mounted to very old (Windows 9x) servers.

Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-09-28 06:53:39 +00:00
Steve French
65874007c3 [CIFS] fix cut and paste error - missing defines cause cifsacl build error
Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-09-25 19:53:44 +00:00
Steve French
bcb020341a [CIFS] move cifs acl code to new file and fix build break
Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-09-25 16:17:24 +00:00
Steve French
442aa310f3 [CIFS] Support for CIFS ACLs (part 1)
Add code to be able to dump CIFS ACL information
when Query Posix ACL with cifsacl mount parm enabled.

Signed-off-by: Shirish Pargoankar <shirishp@us.ibm.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-09-24 20:25:46 +00:00
Steve French
2224f4e5d5 [CIFS] fix typo in previous commit
Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-09-20 15:37:29 +00:00
Steve French
1e71f25d14 [CIFS] Print better error when server returns malformed QueryUnixInfo response
Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-09-20 15:30:07 +00:00
Steve French
5a44b3190e [CIFS] Add warning message when broken server fails SetFSInfo call
A reasonably common NAS server returns an error on the SetFSInfo of
the Unix capabilities. Log a message for this alerting the user
that the server may have problems with the Unix extensions,
and telling them what they can do to workaround it.

Unfortunately the server does not return other clues
that we could easily use to turn the Unix Extension support
off automatically in this case (since they claim to support it).

Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-09-20 15:16:24 +00:00
Steve French
c45d707f67 [CIFS] Fallback to standard mkdir if server incorrectly claims support for
posix ops

Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-09-17 02:04:21 +00:00
Steve French
5a07cdf86c [CIFS] fix small memory leak in an error path in new posix mkdir
There is a small memory leak in fs/cifs/inode.c::cifs_mkdir().
Storage for 'pInfo' is allocated with kzalloc(), but if the call
to CIFSPOSIXCreate(...) happens to return 0 and pInfo->Type == -1,
then we'll jump to the 'mkdir_get_info' label without freeing the
storage allocated for 'pInfo'.
This patch adds a kfree() call to free the storage just before
jumping to the label, thus getting rid of the leak.

Signed-off-by: Jesper Juhl <jesper.juhl@gmail.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-09-16 23:12:47 +00:00
Steve French
a23d306981 [CIFS] missing field in debug output from previous fix
Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-09-15 03:43:47 +00:00
Steve French
88f370a688 [CIFS] Fix potential NULL pointer usage if kzalloc fails
Potential problem was noticed by Cyrill Gorcunov

CC: Cyrill Gorcunov <gorcunov@gmail.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-09-15 03:01:17 +00:00
Steve French
638b250766 [CIFS] typo in earlier cifs_reconnect fix
Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-09-15 02:35:51 +00:00
Jeff
a8cd925f74 [CIFS] Respect umask when using POSIX mkdir
When making a directory with POSIX mkdir calls, cifs_mkdir does not
respect the umask.  This patch causes the new POSIX mkdir to create with
the right mode

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-09-13 18:38:50 +00:00
Steve French
4efa53f090 [CIFS] lock inode open file list in close in case racing with open
Harmless since it only protected turning off caching for the
inode, but cleaner to lock around this in case we have a close
racing with open.

Signed-off-by: Shaggy <shaggy@us.ibm.com>
CC: Cyrill Gorcunov <gorcunov@gmail.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-09-11 05:50:53 +00:00
Steve French
15745320f3 [CIFS] Fix oops in find_writable_file
There was a case in which find_writable_file was not waiting long enough
under heavy stress when writepages was racing with close of the file
handle being used by the write.

Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-09-07 22:23:48 +00:00
Steve French
77159b4df8 [CIFS] Fix warnings shown by newer version of sparse
Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-08-31 01:10:17 +00:00
Steve French
26f57364d7 [CIFS] formatting cleanup found by checkpatch
Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-08-30 22:09:15 +00:00
Steve French
f01d5e14e7 [CIFS] fix for incorrect session reconnects
cifs reconnect could end up happening incorrectly due to
the small initial tcp recvmsg response. When the socket
was within three bytes of being full and the recvmsg
returned only 1 to 3 bytes of the initial 4 byte
read of the RFC1001 length field. Fortunately this
seems to be less common on more current kernels, but
this fixes it so cifs tries to retrieve all 4 bytes
of the initial tcp read.

Signed-off-by: Shirish Pargoankar <shirishp@us.ibm.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-08-30 21:13:31 +00:00
Andre Haupt
8594c15ad2 [CIFS][KJ] use abs() from kernel.h where appropriate
Signed-off-by: Andrew Haupt <andre@finow14.de>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-08-30 20:18:41 +00:00
Steve French
c19eb71020 [CIFS] fix typo in previous
Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-08-24 03:22:48 +00:00
Jeff Layton
39db810cb6 [CIFS] Byte range unlock request to non-Unix server can unlock too much
On a mount without posix extensions enabled, when an unlock request is
made, the client can release more than is intended. To reproduce, on a
CIFS mount without posix extensions enabled:

1) open file
2) do fcntl lock: start=0 len=1
3) do fcntl lock: start=2 len=1
4) do fcntl unlock: start=0 len=1

...on the unlock call the client sends an unlock request to the server
for both locks. The problem is a bad test in cifs_lock.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-08-24 03:16:51 +00:00
Cyrill Gorcunov
95ba736210 [CIFS] Fix unbalanced call to GetXid/FreeXid
Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-08-24 00:23:36 +00:00
Steve French
8064ab4da1 [CIFS] cifs truncate missing a fix for private map COW race
vmtruncate had added the same fix to handle the case of private pages
being Copy on writed while truncate_inode_pages is going on

Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-08-22 22:12:07 +00:00
Cyrill Gorcunov
5e6e623275 [CIFS] Check return code on failed alloc
Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-08-18 00:15:20 +00:00
Steve French
a403a0a370 [CIFS] Fix hang in find_writable_file
Caused by unneeded reopen during reconnect while spinlock held.

Fixes kernel bugzilla bug #7903

Thanks to Lin Feng Shen for testing this, and Amit Arora for
some nice problem determination to narrow this down.

Acked-by: Dave Kleikamp <shaggy@us.ibm.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-07-26 15:54:16 +00:00
Paul Mundt
20c2df83d2 mm: Remove slab destructors from kmem_cache_create().
Slab destructors were no longer supported after Christoph's
c59def9f22 change. They've been
BUGs for both slab and slub, and slob never supported them
either.

This rips out support for the dtor pointer from kmem_cache_create()
completely and fixes up every single callsite in the kernel (there were
about 224, not including the slab allocator definitions themselves,
or the documentation references).

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2007-07-20 10:11:58 +09:00
Steve French
1ff8392c32 Merge branch 'master' of /pub/scm/linux/kernel/git/torvalds/linux-2.6
Conflicts:

	fs/cifs/export.c
2007-07-19 00:38:57 +00:00
Steve French
70b315b0dd [CIFS] merge conflict in fs/cifs/export.c
Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-07-19 00:32:25 +00:00
Steve French
c18c842b1f [CIFS] Allow disabling CIFS Unix Extensions as mount option
Previously the only way to do this was to umount all mounts to that server,
turn off a proc setting (/proc/fs/cifs/LinuxExtensionsEnabled).

Fixes Samba bugzilla bug number: 4582 (and also 2008)

Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-07-18 23:21:09 +00:00
Steve French
63135e088a [CIFS] More whitespace/formatting fixes (noticed by checkpatch)
Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-07-17 17:34:02 +00:00
Christoph Hellwig
a569425512 knfsd: exportfs: add exportfs.h header
currently the export_operation structure and helpers related to it are in
fs.h.  fs.h is already far too large and there are very few places needing the
export bits, so split them off into a separate header.

[akpm@linux-foundation.org: fix cifs build]
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Neil Brown <neilb@suse.de>
Cc: Steven French <sfrench@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-17 10:23:06 -07:00
Rafael J. Wysocki
8314418629 Freezer: make kernel threads nonfreezable by default
Currently, the freezer treats all tasks as freezable, except for the kernel
threads that explicitly set the PF_NOFREEZE flag for themselves.  This
approach is problematic, since it requires every kernel thread to either
set PF_NOFREEZE explicitly, or call try_to_freeze(), even if it doesn't
care for the freezing of tasks at all.

It seems better to only require the kernel threads that want to or need to
be frozen to use some freezer-related code and to remove any
freezer-related code from the other (nonfreezable) kernel threads, which is
done in this patch.

The patch causes all kernel threads to be nonfreezable by default (ie.  to
have PF_NOFREEZE set by default) and introduces the set_freezable()
function that should be called by the freezable kernel threads in order to
unset PF_NOFREEZE.  It also makes all of the currently freezable kernel
threads call set_freezable(), so it shouldn't cause any (intentional)
change of behaviour to appear.  Additionally, it updates documentation to
describe the freezing of tasks more accurately.

[akpm@linux-foundation.org: build fixes]
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Acked-by: Nigel Cunningham <nigel@nigel.suspend2.net>
Cc: Pavel Machek <pavel@ucw.cz>
Cc: Oleg Nesterov <oleg@tv-sign.ru>
Cc: Gautham R Shenoy <ego@in.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-07-17 10:23:02 -07:00
Steve French
7e42ca886b [CIFS] Typo in previous patch
Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-07-16 17:40:02 +00:00
Eric
6fa20d4fb5 [CIFS] zero_user_page() conversions
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-07-16 16:23:19 +00:00
Nate
8803863a90 [CIFS] use simple_prepare_write to zero page data
It's common for file systems to need to zero data on either side of a
write, if a page is not Uptodate during prepare_write.  It just so happens
that simple_prepare_write() in libfs.c does exactly that, so we can avoid
duplication and just call that function to zero page data.

Signed-off-by: Nate Diller <nate.diller@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-07-16 15:45:13 +00:00
Steve French
4a379e6657 [CIFS] Fix build break - inet.h not included when experimental ifdef off
Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-07-15 21:58:28 +00:00
Steve French
2d785a50a8 [CIFS] Add support for new POSIX unlink
In the cleanup phase of the dbench test, we were noticing sharing
violation followed by failed directory removals when dbench
did not close the test files before the cleanup phase started.
Using the new POSIX unlink, which Samba has supported for a few
months, avoids this.

Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-07-15 01:48:57 +00:00
Steve French
50c2f75388 [CIFS] whitespace/formatting fixes
This should be the last big batch of whitespace/formatting fixes.
checkpatch warnings for the cifs directory are down about 90% and
many of the remaining ones are harder to remove or make the code
harder to read.

Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-07-13 00:33:32 +00:00
Steve French
7521a3c566 [CIFS] Fix oops in cifs_create when nfsd server exports cifs mount
nfsd is passing null nameidata (probably the only one doing that)
on call to create - cifs was missing one check for this.

Note that running nfsd over a cifs mount requires specifying fsid on
the nfs exports entry and requires mounting cifs with serverino mount
option.

Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-07-11 18:30:34 +00:00
Jens Axboe
5ffc4ef45b sendfile: remove .sendfile from filesystems that use generic_file_sendfile()
They can use generic_file_splice_read() instead. Since sys_sendfile() now
prefers that, there should be no change in behaviour.

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
2007-07-10 08:04:13 +02:00
Steve French
fb8c4b14d9 [CIFS] whitespace cleanup
More than halfway there

Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-07-10 01:16:18 +00:00
Steve French
b609f06ac4 [CIFS] Fix packet signatures for NTLMv2 case
Signed-off-by: Yehuda Sadeh Weinraub <Yehuda.Sadeh@expand.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-07-09 07:55:14 +00:00
Steve French
3870253efb [CIFS] more whitespace fixes
Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-07-08 15:40:40 +00:00
Steve French
790fe579f5 [CIFS] more whitespace cleanup
Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-07-07 19:25:05 +00:00
Steve French
6dc0f87e35 [CIFS] whitespace cleanup
Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-07-06 23:13:06 +00:00
Steve French
79a58d1f60 [CIFS] whitespace cleanup
checkpatch.pl redux

Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-07-06 22:44:50 +00:00
Jeff
d20acd09e3 [CIFS] ipv6 support no longer experimental
Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-07-06 21:13:08 +00:00
Jeff
38c10a1ddb [CIFS] Mount should fail if server signing off but client mount option requires it
Currently, if mount with a signing-enabled sec= option (e.g.
sec=ntlmi), the kernel does a warning printk if the server doesn't
support signing, and then proceeds without signatures.

This is probably OK for people that think to look at the ring buffer,
but seems wrong to me. If someone explicitly requests signing, we
should error out if that request can't be satisfied. They can then
reattempt the mount without signing if that's ok.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-07-06 21:10:07 +00:00
Steve French
d38d8c74c7 [CIFS] whitespace fixes
This changeset brought to you ... by patchcheck.pl

Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-06-28 19:44:13 +00:00
Steve French
762e5ab77c [CIFS] Fix sign mount option and sign proc config setting
We were checking the wrong (old) global variable to determine
whether to override server and force signing on the SMB
connection.

Acked-by: Dave Kleikamp <shaggy@austin.ibm.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-06-28 18:41:42 +00:00
Steve French
467a8f8d48 [CIFS] whitespace cleanup
Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-06-27 22:41:32 +00:00
Jeff
5d9c720678 [CIFS] Do not allow signals in cifs_demultiplex_thread
Switch from send_sig to force_sig and do not allow signal for this
background thread (the signal is needed to wakeup the thread when
blocked in the network stack).

Signed-off-by: Jeff Layton <jlayton@readhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-06-25 22:16:35 +00:00
Steve French
ffdd6e4d16 [CIFS] fix whitespace
More whitespace problems found by checkpatch

Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-06-24 21:15:44 +00:00
Steve French
75865f8cc8 [CIFS] Add in some missing flags and cifs README and TODO corrections
Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-06-24 18:30:48 +00:00
Steve French
3ce53fc4c5 [CIFS] CIFS should honour umask
This patch makes CIFS honour a process' umask like other filesystems.
Of course the server is still free to munge the permissions if it wants
to; but the client will send the "right" permissions to begin with.

A few caveats:

1) It only applies to filesystems that have CAP_UNIX (aka support unix
extensions)
2) It applies the correct mode to the follow up CIFSSMBUnixSetPerms()
after remote creation

When mode to CIFS/NTFS ACL mapping is complete we can do the
same thing for that case for servers which do not
support the Unix Extensions.

Signed-off-by: Matt Keenen <matt@opcode-solutions.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-06-08 14:55:14 +00:00
Yehuda Sadeh Weinraub
100c1ddc98 [CIFS] Missing flag on negprot needed for some servers to force packet signing
A related signature issue that I came across.
There's a bug in win2k that when NT error codes are not negotiated, the
server doesn't response that signatures are mandatory. Since there's
(currently) no way turn on signatures in such case, I had to force NT
error codes, so that this bug will not occur

Signed-off-by: Yehuda Sadeh Weinraub <Yehuda.Sadeh@expand.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-06-05 21:31:16 +00:00
Steve French
221601c3d1 [CIFS] whitespace cleanup part 2
Various coding style problems found by running the new
   checkpatch.pl script against fs/cifs.  3 more files
   fixed up.

Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-06-05 20:35:06 +00:00
Steve French
5fdae1f681 [CIFS] whitespace cleanup
Various coding style problems found by running fs/cifs
against the new checkpatch.pl script.  Since there
were too many to fit in one patch.  Updated the first
four files.

Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-06-05 18:30:44 +00:00
Akinobu Mita
e6985c7f68 [CIFS] fix mempool destroy done in wrong order in cifs error path
Slab cache used as memory pool can not be destroyed before the memory
pool destruction. Because the memory pool still holds some objects and
kmem_cache_destroy() says "Can't free all objects".

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-06-04 16:14:59 +00:00
Steve French
f7f7c31c98 [CIFS] typo in previous patch
(also fixed missing space after if)

Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-05-24 02:29:51 +00:00
Steve French
28356a1679 [CIFS] Fix oops on failed cifs mount (in kthread_stop)
If the cifs demultiplex thread wakes up and exits
(zeroing server->tsk) before kthread_stop is called, the
cifs_mount code could pass a null pointer to kthread_stop

Thanks to akpm, Dave Young and Shaggy for suggesting
earlier versions of this patch.

CC: akpm@linux-foundatior.org
Signed-off-by: Dave Young <hidave.darkstar@gmail.com>
Signed-off-by: Dave Kleikamp <shaggy@linux.vnet.ibm.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-05-23 14:45:36 +00:00
Christoph Lameter
a35afb830f Remove SLAB_CTOR_CONSTRUCTOR
SLAB_CTOR_CONSTRUCTOR is always specified. No point in checking it.

Signed-off-by: Christoph Lameter <clameter@sgi.com>
Cc: David Howells <dhowells@redhat.com>
Cc: Jens Axboe <jens.axboe@oracle.com>
Cc: Steven French <sfrench@us.ibm.com>
Cc: Michael Halcrow <mhalcrow@us.ibm.com>
Cc: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
Cc: Miklos Szeredi <miklos@szeredi.hu>
Cc: Steven Whitehouse <swhiteho@redhat.com>
Cc: Roman Zippel <zippel@linux-m68k.org>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Dave Kleikamp <shaggy@austin.ibm.com>
Cc: Trond Myklebust <trond.myklebust@fys.uio.no>
Cc: "J. Bruce Fields" <bfields@fieldses.org>
Cc: Anton Altaparmakov <aia21@cantab.net>
Cc: Mark Fasheh <mark.fasheh@oracle.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Christoph Hellwig <hch@lst.de>
Cc: Jan Kara <jack@ucw.cz>
Cc: David Chinner <dgc@sgi.com>
Cc: "David S. Miller" <davem@davemloft.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-17 05:23:04 -07:00
Randy Dunlap
e63340ae6b header cleaning: don't include smp_lock.h when not used
Remove includes of <linux/smp_lock.h> where it is not used/needed.
Suggested by Al Viro.

Builds cleanly on x86_64, i386, alpha, ia64, powerpc, sparc,
sparc64, and arm (all 59 defconfigs).

Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-08 11:15:07 -07:00
Christoph Lameter
50953fe9e0 slab allocators: Remove SLAB_DEBUG_INITIAL flag
I have never seen a use of SLAB_DEBUG_INITIAL.  It is only supported by
SLAB.

I think its purpose was to have a callback after an object has been freed
to verify that the state is the constructor state again?  The callback is
performed before each freeing of an object.

I would think that it is much easier to check the object state manually
before the free.  That also places the check near the code object
manipulation of the object.

Also the SLAB_DEBUG_INITIAL callback is only performed if the kernel was
compiled with SLAB debugging on.  If there would be code in a constructor
handling SLAB_DEBUG_INITIAL then it would have to be conditional on
SLAB_DEBUG otherwise it would just be dead code.  But there is no such code
in the kernel.  I think SLUB_DEBUG_INITIAL is too problematic to make real
use of, difficult to understand and there are easier ways to accomplish the
same effect (i.e.  add debug code before kfree).

There is a related flag SLAB_CTOR_VERIFY that is frequently checked to be
clear in fs inode caches.  Remove the pointless checks (they would even be
pointless without removeal of SLAB_DEBUG_INITIAL) from the fs constructors.

This is the last slab flag that SLUB did not support.  Remove the check for
unimplemented flags from SLUB.

Signed-off-by: Christoph Lameter <clameter@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-05-07 12:12:57 -07:00
Steve French
0ec54aa8af [CIFS] Fix typo in cifs readme from previous commit
Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-05-05 22:08:06 +00:00
Jeff Layton
8426c39c12 [CIFS] Make sec=none force an anonymous mount
We had a customer report that attempting to make CIFS mount with a null
username (i.e. doing an anonymous mount) doesn't work. Looking through the
code, it looks like CIFS expects a NULL username from userspace in order
to trigger an anonymous mount. The mount.cifs code doesn't seem to ever
pass a null username to the kernel, however.

It looks also like the kernel can take a sec=none option, but it only seems
to look at it if the username is already NULL. This seems redundant and
effectively makes sec=none useless.

The following patch makes sec=none force an anonymous mount.

Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-05-05 03:27:49 +00:00
Roland Dreier
796e5661f6 [CIFS] Change semaphore to mutex for cifs lock_sem
Originally at http://lkml.org/lkml/2006/9/2/86

The recent change to "allow Windows blocking locks to be cancelled via a
CANCEL_LOCK call" introduced a new semaphore in struct cifsFileInfo,
lock_sem.  However, semaphores used as mutexes are deprecated these days,
and there's no reason to add a new one to the kernel.  Therefore, convert
lock_sem to a struct mutex (and also fix one indentation glitch on one of
the lines changed anyway).

Signed-off-by: Roland Dreier <roland@digitalvampire.org>
Signed-off-by: Jan Engelhardt <jengelh@gmx.de>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-05-03 04:33:45 +00:00
Steve French
0b2365f826 [CIFS] Fix oops in reset_cifs_unix_caps on reconnect
Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-05-03 04:30:13 +00:00
Steve French
4523cc3044 [CIFS] UID/GID override on CIFS mounts to Samba
When CIFS Unix Extensions are negotiated we get the Unix uid and gid
owners of the file from the server (on the Unix Query Path Info
levels), but if the server's uids don't match the client uid's users
were having to disable the Unix Extensions (which turned off features
they still wanted).   The changeset patch allows users to override uid
and/or gid for file/directory owner with a default uid and/or gid
specified at mount (as is often done when mounting from Linux cifs
client to Windows server).  This changeset also displays the uid
and gid used by default in /proc/mounts (if applicable).

Also cleans up code by adding some of the missing spaces after
"if" keywords per-kernel style guidelines (as suggested by Randy Dunlap
when he reviewed the patch).

Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-04-30 20:13:06 +00:00
Steve French
984acfe1cf [CIFS] prefixpath mounts to servers supporting posix paths used wrong slash
Acked-by: Alexander Bokovoy <abokovoy@ru.ibm.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-04-26 16:42:50 +00:00
Steve French
deb0420c6f [CIFS] Update cifs version to 1.49
Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-04-26 14:35:54 +00:00