Commit Graph

44 Commits

Author SHA1 Message Date
Al Viro 1c929cfe6d switch cifs
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2011-01-12 20:02:46 -05:00
Nick Piggin fb045adb99 fs: dcache reduce branches in lookup path
Reduce some branches and memory accesses in dcache lookup by adding dentry
flags to indicate common d_ops are set, rather than having to check them.
This saves a pointer memory access (dentry->d_op) in common path lookup
situations, and saves another pointer load and branch in cases where we
have d_op but not the particular operation.

Patched with:

git grep -E '[.>]([[:space:]])*d_op([[:space:]])*=' | xargs sed -e 's/\([^\t ]*\)->d_op = \(.*\);/d_set_d_op(\1, \2);/' -e 's/\([^\t ]*\)\.d_op = \(.*\);/d_set_d_op(\&\1, \2);/' -i

Signed-off-by: Nick Piggin <npiggin@kernel.dk>
2011-01-07 17:50:28 +11:00
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 7ffec37245 cifs: add refcounted and timestamped container for holding tcons
Eventually, we'll need to track the use of tcons on a per-sb basis, so that
we know when it's ok to tear them down. Begin this conversion by adding a
new "tcon_link" struct and accessors that get it. For now, the core data
structures are untouched -- cifs_sb still just points to a single tcon and
the pointers are just cast to deal with the accessor functions. A later
patch will flesh this out.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2010-10-06 16:12:44 +00:00
Jeff Layton a6e8a8455c cifs: add function to get a tcon from cifs_sb
When we convert cifs to do multiple sessions per mount, we'll need more
than one tcon per superblock. At that point "cifs_sb->tcon" will make
no sense. Add a new accessor function that gets a tcon given a cifs_sb.
For now, it just returns cifs_sb->tcon. Later it'll do more.

Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2010-09-29 19:04:32 +00:00
Stefan Metzmacher 1b12b9c15b cifs: use Minshall+French symlink functions
If configured, Minshall+French Symlinks are used against
all servers. If the server supports UNIX Extensions,
we still create Minshall+French Symlinks on write,
but on read we fallback to UNIX Extension symlinks.

Signed-off-by: Stefan Metzmacher <metze@samba.org>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2010-09-29 19:04:31 +00:00
Stefan Metzmacher 8713d01db8 cifs: implement CIFSCreateMFSymLink()
Signed-off-by: Stefan Metzmacher <metze@samba.org>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2010-09-29 19:04:31 +00:00
Stefan Metzmacher 18bddd1059 cifs: implement CIFSFormatMFSymlink()
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
Stefan Metzmacher 0fd43ae475 cifs: implement CIFSQueryMFSymLink()
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
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
Stefan Metzmacher c69c1b6eae cifs: implement CIFSParseMFSymlink()
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
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
Tejun Heo 5a0e3ad6af include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h
percpu.h is included by sched.h and module.h and thus ends up being
included when building most .c files.  percpu.h includes slab.h which
in turn includes gfp.h making everything defined by the two files
universally available and complicating inclusion dependencies.

percpu.h -> slab.h dependency is about to be removed.  Prepare for
this change by updating users of gfp and slab facilities include those
headers directly instead of assuming availability.  As this conversion
needs to touch large number of source files, the following script is
used as the basis of conversion.

  http://userweb.kernel.org/~tj/misc/slabh-sweep.py

The script does the followings.

* Scan files for gfp and slab usages and update includes such that
  only the necessary includes are there.  ie. if only gfp is used,
  gfp.h, if slab is used, slab.h.

* When the script inserts a new include, it looks at the include
  blocks and try to put the new include such that its order conforms
  to its surrounding.  It's put in the include block which contains
  core kernel includes, in the same order that the rest are ordered -
  alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
  doesn't seem to be any matching order.

* If the script can't find a place to put a new include (mostly
  because the file doesn't have fitting include block), it prints out
  an error message indicating which .h file needs to be added to the
  file.

The conversion was done in the following steps.

1. The initial automatic conversion of all .c files updated slightly
   over 4000 files, deleting around 700 includes and adding ~480 gfp.h
   and ~3000 slab.h inclusions.  The script emitted errors for ~400
   files.

2. Each error was manually checked.  Some didn't need the inclusion,
   some needed manual addition while adding it to implementation .h or
   embedding .c file was more appropriate for others.  This step added
   inclusions to around 150 files.

3. The script was run again and the output was compared to the edits
   from #2 to make sure no file was left behind.

4. Several build tests were done and a couple of problems were fixed.
   e.g. lib/decompress_*.c used malloc/free() wrappers around slab
   APIs requiring slab.h to be added manually.

5. The script was run on all .h files but without automatically
   editing them as sprinkling gfp.h and slab.h inclusions around .h
   files could easily lead to inclusion dependency hell.  Most gfp.h
   inclusion directives were ignored as stuff from gfp.h was usually
   wildly available and often used in preprocessor macros.  Each
   slab.h inclusion directive was examined and added manually as
   necessary.

6. percpu.h was updated not to include slab.h.

7. Build test were done on the following configurations and failures
   were fixed.  CONFIG_GCOV_KERNEL was turned off for all tests (as my
   distributed build env didn't work with gcov compiles) and a few
   more options had to be turned off depending on archs to make things
   build (like ipr on powerpc/64 which failed due to missing writeq).

   * x86 and x86_64 UP and SMP allmodconfig and a custom test config.
   * powerpc and powerpc64 SMP allmodconfig
   * sparc and sparc64 SMP allmodconfig
   * ia64 SMP allmodconfig
   * s390 SMP allmodconfig
   * alpha SMP allmodconfig
   * um on x86_64 SMP allmodconfig

8. percpu.h modifications were reverted so that it could be applied as
   a separate patch and serve as bisection point.

Given the fact that I had only a couple of failures from tests on step
6, I'm fairly confident about the coverage of this conversion patch.
If there is a breakage, it's likely to be something in one of the arch
headers which should be easily discoverable easily on most builds of
the specific arch.

Signed-off-by: Tejun Heo <tj@kernel.org>
Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-30 22:02:32 +09:00
Suresh Jayaraman 0f3bc09ee1 cifs: Fix incorrect return code being printed in cFYI messages
FreeXid() along with freeing Xid does add a cifsFYI debug message that
prints rc (return code) as well. In some code paths where we set/return
error code after calling FreeXid(), incorrect error code is being
printed when cifsFYI is enabled.

This could be misleading in few cases. For eg.
In cifs_open() if cifs_fill_filedata() returns a valid pointer to
cifsFileInfo, FreeXid() prints rc=-13 whereas 0 is actually being
returned. Fix this by setting rc before calling FreeXid().

Basically convert

FreeXid(xid);			rc = -ERR;
return -ERR;		=>	FreeXid(xid);
				return rc;

[Note that Christoph would like to replace the GetXid/FreeXid
calls, which are primarily used for debugging.  This seems
like a good longer term goal, but although there is an
alternative tracing facility, there are no examples yet
available that I know of that we can use (yet) to
convert this cifs function entry/exit logging, and for
creating an identifier that we can use to correlate
all dmesg log entries for a particular vfs operation
(ie identify all log entries for a particular vfs
request to cifs: e.g. a particular close or read or write
or byte range lock call ... and just using the thread id
is harder).  Eventually when a replacement
for this is available (e.g. when NFS switches over and various
samples to look at in other file systems) we can remove the
GetXid/FreeXid macro but in the meantime multiple people
use this run time configurable logging all the time
for debugging, and Suresh's patch fixes a problem
which made it harder to notice some low
memory problems in the log so it is worthwhile
to fix this problem until a better logging
approach is able to be used]

Acked-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Suresh Jayaraman <sjayaraman@suse.de>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2009-06-25 19:12:57 +00:00
Jeff Layton 8b6427a2a8 cifs: fix pointer initialization and checks in cifs_follow_symlink (try #4)
This is the third respin of the patch posted yesterday to fix the error
handling in cifs_follow_symlink. It also includes a fix for a bogus NULL
pointer check in CIFSSMBQueryUnixSymLink that Jeff Moyer spotted.

It's possible for CIFSSMBQueryUnixSymLink to return without setting
target_path to a valid pointer. If that happens then the current value
to which we're initializing this pointer could cause an oops when it's
kfree'd.

This patch is a little more comprehensive than the last patches. It
reorganizes cifs_follow_link a bit for (hopefully) better readability.
It should also eliminate the uneeded allocation of full_path on servers
without unix extensions (assuming they can get to this point anyway, of
which I'm not convinced).

On a side note, I'm not sure I agree with the logic of enabling this
query even when unix extensions are disabled on the client. It seems
like that should disable this as well. But, changing that is outside the
scope of this fix, so I've left it alone for now.

Reported-by: Jeff Moyer <jmoyer@redhat.com>
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Reviewed-by: Jeff Moyer <jmoyer@redhat.com>
Reviewed-by: Christoph Hellwig <hch@inraded.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2009-05-19 15:31:20 +00:00
Steve French 0e0d2cf327 [CIFS] Remove sparse endian warnings
Removes two sparse CHECK_ENDIAN warnings from Jeffs earlier patch,
and removes the dead readlink code (after noting where in
findfirst we will need to add something like that in the future
to handle the newly discovered unexpected error on FindFirst of NTFS symlinks.

Signed-off-by: Steve French <sfrench@us.ibm.com>
2009-05-01 05:27:32 +00:00
Steve French 9e39b0ae8a [CIFS] Remove unneeded QuerySymlink call and fix mapping for unmapped status
Signed-off-by: Steve French <sfrench@us.ibm.com>
2009-04-30 21:31:15 +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 c2cf07d591 [CIFS] Finishup DFS code
Fixup GetDFSRefer to prepare for cleanup of SMB response processing
Fix build warning in link.c

Signed-off-by: Steve French <sfrench@us.ibm.com>
2008-05-15 06:20:02 +00:00
Steve French 646dd53987 [CIFS] Fix paths when share is in DFS to include proper prefix
Some versions of Samba (3.2-pre e.g.) are stricter about checking to make sure that
paths in DFS name spaces are sent in the form \\server\share\dir\subdir ...
instead of \dir\subdir

Acked-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2008-05-15 01:50:56 +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 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
Steve French 366781c196 [CIFS] DFS build fixes
Also includes a few minor changes suggested by Christoph

Signed-off-by: Steve French <sfrench@us.ibm.com>
2008-01-25 10:12:41 +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 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
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 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 1b2b212603 [CIFS] mtime bounces from local to remote when cifs nocmtime i_flags overwritten
atime flag was also overwritten. Noticed by Shirish when he was debugging
an atime problem.  Should help performance a bit too.

cifs should be getting time stamps from the server (that was the original
intent too)

Signed-off-by: Steve French <sfrench@us.ibm.com>
2007-02-17 04:30:54 +00:00
Steve French 31ec35d6c8 [CIFS] Incorrect hardlink count when original file is cached (oplocked)
Fixes Samba bug 2823

In this case hardlink count is stale for one of the two inodes (ie the
original file) until it is closed - since revalidate does not go to
server while file is cached locally.

Signed-off-by: Steve French <sfrench@us.ibm.com>
2006-11-16 20:54:20 +00:00
Steve French 1bd5bbcb65 [CIFS] Legacy time handling for Win9x and OS/2 part 1
Signed-off-by: Steve French <sfrench@us.ibm.com>
2006-09-28 03:35:57 +00:00
Steve French 26a21b980b [CIFS] Cleanup extra whitespace in dmesg logging. Update cifs change log 2006-05-31 18:05:34 +00:00
Steve French 0bd4fa977f [CIFS] [CIFS] Do not take rename sem on most path based calls (during
building of full path) to avoid hang rename/readdir hang

Reported by Alan Tyson

Signed-off-by: Steve French <sfrench@us.ibm.com>
2006-04-21 18:17:42 +00:00
Steve French d62e54abca Merge with /pub/scm/linux/kernel/git/torvalds/linux-2.6.git
Signed-off-by: Steve French <sfrench@us.ibm.com>
2006-03-31 03:35:56 +00:00
Arjan van de Ven a11f3a0574 [PATCH] sem2mutex: vfs_rename_mutex
Semaphore to mutex conversion.

The conversion was generated via scripts, and the result was validated
automatically via a script as well.

Signed-off-by: Arjan van de Ven <arjan@infradead.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Cc: Al Viro <viro@ftp.linux.org.uk>
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-03-23 07:38:12 -08:00
Steve French 083d3a2cff [CIFS] Workaround various server bugs found in testing at connectathon
- slow down negprot 1ms during mount when RFC1001 over port 139
	to give buggy servers time to clear sess_init
	- remap some plausible but incorrect SMB return codes to the
	right ones in truncate and hardlink paths

Signed-off-by: Steve French <sfrench@us.ibm.com>
2006-03-03 09:53:36 +00:00
Jesper Juhl f99d49adf5 [PATCH] kfree cleanup: fs
This is the fs/ part of the big kfree cleanup patch.

Remove pointless checks for NULL prior to calling kfree() in fs/.

Signed-off-by: Jesper Juhl <jesper.juhl@gmail.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-11-07 07:54:06 -08:00
Steve French 7f57356b70 [CIFS] Remove cifs_sb argument from *build_path_from_dentry
This argument was added in a recent patch, but is unnecessary, since
the superblock is easily obtained from the dentry.

Signed-off-by: Dave Kleikamp <shaggy@austin.ibm.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
2005-08-30 11:32:14 -07:00
Steve French b92327fe6b [CIFS] Finish up of case-insensitive dentry handling for cifs. This
will eventually (or should eventually) be common code for jfs, smbfs,
etc. but in the meantime is small enough and necessary when mounting
case insensitive to Windows (nocase).

Signed-off-by: Shaggy (shaggy@austin.ibm.com)
Signed-off-by: Steve French (sfrench@us.ibm.com)
2005-08-22 20:09:43 -07:00
Steve French 646352319b Merge with /pub/scm/linux/kernel/git/torvalds/linux-2.6.git 2005-08-20 21:40:00 -07:00
Linus Torvalds cc314eef01 Fix nasty ncpfs symlink handling bug.
This bug could cause oopses and page state corruption, because ncpfs
used the generic page-cache symlink handlign functions.  But those
functions only work if the page cache is guaranteed to be "stable", ie a
page that was installed when the symlink walk was started has to still
be installed in the page cache at the end of the walk.

We could have fixed ncpfs to not use the generic helper routines, but it
is in many ways much cleaner to instead improve on the symlink walking
helper routines so that they don't require that absolute stability.

We do this by allowing "follow_link()" to return a error-pointer as a
cookie, which is fed back to the cleanup "put_link()" routine.  This
also simplifies NFS symlink handling.

Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-08-19 18:02:56 -07:00
Jeremy Allison ac67055ef2 [CIFS] POSIX extensions, SetFSInfo added
Signed-off-by: Steve French@sfrench@us.ibm.com
Signed-off-by: Jeremy Allison (jra@samba.org)
2005-06-22 17:26:35 -07:00
Steve French 737b758c96 [PATCH] cifs: character mapping of special characters (part 3 of 3)
Signed-off-by: Steve French (sfrench@us.ibm.com)
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2005-04-28 22:41:06 -07:00
Linus Torvalds 1da177e4c3 Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!
2005-04-16 15:20:36 -07:00