Commit Graph

42 Commits

Author SHA1 Message Date
Dave Kleikamp
6ab409b53d cifs: Replace wrtPending with a real reference count
Currently, cifs_close() tries to wait until all I/O is complete and then
frees the file private data.  If I/O does not completely in a reasonable
amount of time it frees the structure anyway, leaving a potential use-
after-free situation.

This patch changes the wrtPending counter to a complete reference count and
lets the last user free the structure.

Signed-off-by: Dave Kleikamp <shaggy@linux.vnet.ibm.com>
Reviewed-by: Jeff Layton <jlayton@redhat.com>
Tested-by: Shirish Pargaonkar <shirishp@us.ibm.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2009-09-01 22:35:01 +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
Christoph Hellwig
b96d31a62f cifs: clean up set_cifs_acl interfaces
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 18:41:56 +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
Shirish Pargaonkar
ef571cadd5 [CIFS] Fix warnings from checkpatch
Signed-off-by: Steve French <sfrench@us.ibm.com>
2008-07-24 15:56:05 +00:00
Shirish Pargaonkar
b1910ad622 [CIFS] Fix improper endian conversion of ACL subauth field
In mode_to_acl when converting a Unix mode to a Windows ACL
the subauth fields of the SID in the ACL were translated
incorrectly on bigendian architectures

Signed-off-by: Steve French <sfrench@us.ibm.com>
2008-07-24 14:53:20 +00:00
Jeff Layton
536abdb080 cifs: fix wksidarr declaration to be big-endian friendly
The current definition of wksidarr works fine on little endian arches
(since cpu_to_le32 is a no-op there), but on big-endian arches, it fails
to compile with this error:

error: braced-group within expression allowed only inside a function

The problem is that this static declaration has cpu_to_le32 embedded
within it, and that expands into a function macro.  We need to use
__constant_cpu_to_le32() instead.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Cc: Steven French <sfrench@us.ibm.com>
Cc: <stable@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-07-12 14:33:42 -07:00
Steve French
af4b3c355c [CIFS] fix build warning
Signed-off-by: Steve French <sfrench@us.ibm.com>
2008-05-09 03:48:05 +00:00
Steve French
4b18f2a9c3 [CIFS] convert usage of implicit booleans to bool
Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2008-04-29 00:06:05 +00:00
Steve French
cce246ee5f [CIFS] Fix acl length when very short ACL being modified by chmod
Signed-off-by: Shirish Pargaonkar <shirishp@us.ibm.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2008-04-09 20:55:31 +00:00
Al Viro
2b210adcb0 cifs: fix misannotations
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-03-30 14:20:23 -07:00
Steve French
8b1327f6ed [CIFS] file create with acl support enabled is slow
Shirish Pargaonkar noted:
With cifsacl mount option, when a file is created on the Windows server,
exclusive oplock is broken right away because the get cifs acl code
again opens the file to obtain security descriptor.
The client does not have the newly created file handle or inode in any
of its lists yet so it does not respond to oplock break and server waits for
its duration and then responds to the second open. This slows down file
creation signficantly.  The fix is to pass the file descriptor to the get
cifsacl code wherever available so that get cifs acl code does not send
second open (NT Create ANDX) and oplock is not broken.

CC: Shirish Pargaonkar <shirishp@us.ibm.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2008-03-14 22:37:16 +00:00
Shirish Pargaonkar
d9f382eff6 [CIFS] patch to fix incorrect encoding of number of aces on set mode
This patch fixes an error in the experimental cifs acl code. During chmod,
set security descriptor data (num aces) is not sent with little-endian encoding.

Signed-off-by: Shirish Pargaonkar <shirishp@us.ibm.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2008-02-12 20:46:26 +00:00
Steve French
90c81e0b0e [CIFS] clean up some hard to read ifdefs
Christoph had noticed too many ifdefs in the CIFS code making it
hard to read.  This patch removes about a quarter of them from
the C files in cifs by improving a few key ifdefs in the .h files.

Signed-off-by: Steve French <sfrench@us.ibm.com>
2008-02-12 20:32:36 +00:00
Steve French
ad7a2926b9 [CIFS] reduce checkpatch warnings
Signed-off-by: Steve French <sfrench@us.ibm.com>
2008-02-07 23:25:02 +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
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
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
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
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
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
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
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
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
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
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
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
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