Commit Graph

57 Commits

Author SHA1 Message Date
Steven Whitehouse
ae619320b2 [GFS2] mark_inode_dirty after write to stuffed file
Writes to stuffed files were not being marked dirty correctly.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-11-30 10:36:36 -05:00
Steven Whitehouse
dcd2479959 [GFS2] Remove unused function from inode.c
The gfs2_glock_nq_m_atime function is unused in so far as its only
ever called with num_gh = 1, and this falls through to the
gfs2_glock_nq_atime function, so we might as well call that directly.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-11-30 10:35:57 -05:00
Russell Cattelan
61057c6bb3 [GFS2] Remove unused zero_readpage from stuffed_readpage
Stuffed files only consist of a maximum of
(gfs2 block size - sizeof(struct gfs2_dinode)) bytes. Since the
gfs2 block size is always less than page size, we will never see
a call to stuffed_readpage for anything other than the first page
in the file.

Signed-off-by: Russell Cattelan <cattelan@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-11-30 10:34:57 -05:00
Steven Whitehouse
2ca99501fa [GFS2] Fix page lock/glock deadlock
This fixes a race between the glock and the page lock encountered
during truncate in gfs2_readpage and gfs2_prepare_write. The gfs2_readpages
function doesn't need the same fix since it only uses a try lock anyway, so
it will fail back to gfs2_readpage in the case of a potential deadlock.

This bug was spotted by Russell Cattelan.

Cc: Russell Cattelan <cattelan@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-11-30 10:34:43 -05:00
Steven Whitehouse
1a7b1eed58 [GFS2] Shrink gfs2_inode (6) - di_atime/di_mtime/di_ctime
Remove the di_[amc]time fields and use inode->i_[amc]time
fields instead. This saves 24 bytes from the gfs2_inode.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-11-30 10:34:23 -05:00
Steven Whitehouse
2933f9254a [GFS2] Shrink gfs2_inode (4) - di_uid/di_gid
Remove duplicate di_uid/di_gid fields in favour of using
inode->i_uid/inode->i_gid instead. This saves 8 bytes.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-11-30 10:34:17 -05:00
Steven Whitehouse
b60623c238 [GFS2] Shrink gfs2_inode (3) - di_mode
This removes the duplicate di_mode field in favour of using the
inode->i_mode field. This saves 4 bytes.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-11-30 10:34:14 -05:00
OGAWA Hirofumi
7011774db8 [PATCH] gfs2: ->readpages() fixes
This just ignore the remaining pages, and remove unneeded unlock_pages().

Signed-off-by: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
Cc: Steven French <sfrench@us.ibm.com>
Cc: Miklos Szeredi <miklos@szeredi.hu>
Acked-by: Steven Whitehouse <swhiteho@redhat.com>
Cc: Trond Myklebust <trond.myklebust@fys.uio.no>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-11-03 12:27:57 -08:00
Steven Whitehouse
23591256d6 [GFS2] Fix bmap to map extents properly
This fix means that bmap will map extents of the length requested
by the VFS rather than guessing at it, or just mapping one block
at a time. The other callers of gfs2_block_map are audited to ensure
they send the correct max extent lengths (i.e. set bh->b_size correctly).

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-10-20 09:13:40 -04:00
Russell Cattelan
c312c4fdc8 [GFS2] Pass the correct value to kunmap_atomic
Pass kaddr rather than (incorrect) struct page to kunmap_atomic.

Signed-off-by: Russell Cattelan <cattelan@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-10-12 17:11:13 -04:00
Steven Whitehouse
f5c54804d9 [GFS2] Fix uninitialised variable
This fixes a bug where, in certain cases an uninitialised variable
could cause a dereference of a NULL pointer in gfs2_commit_write().
Also a typo in a comment is fixed at the same time.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-10-12 17:10:15 -04:00
Russell Cattelan
52ae7b7935 [GFS2] Fix a size calculation error
Fix a size calculation error.
The size was incorrect being computed as a
negative length and then being passed to an
unsigned parameter.

This in turn would cause the allocator to
think it needed enough meta data to store
a gigabyte file for every file created.

Signed-off-by: Russell Cattelan <cattelan@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-10-12 17:09:54 -04:00
Steven Whitehouse
48516ced21 [GFS2] Remove uneeded endian conversion
In many places GFS2 was calling the endian conversion routines
for an inode even when only a single field, or a few fields might
have changed. As a result we were copying lots of data needlessly.

This patch replaces those calls with conversion of just the
required fields in each case. This should be faster and easier
to understand. There are still other places which suffer from this
problem, but this is a start in the right direction.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-10-02 12:39:19 -04:00
Steven Whitehouse
907b9bceb4 [GFS2/DLM] Fix trailing whitespace
As per Andrew Morton's request, removed trailing whitespace.

Cc: Andrew Morton <akpm@osdl.org>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-09-25 09:26:04 -04:00
Steven Whitehouse
7276b3b0c7 [GFS2] Tidy up meta_io code
Fix a bug in the directory reading code, where we might have dereferenced
a NULL pointer in case of OOM. Updated the directory code to use the new
& improved version of gfs2_meta_ra() which now returns the first block
that was being read. Previously it was releasing it requiring following
code to grab the block again at each point it was called.

Also turned off readahead on directory lookups since we are reading a
hash table, and therefore reading the entries in order is very
unlikely. Readahead is still used for all other calls to the
directory reading function (e.g. when growing the hash table).

Removed the DIO_START constant. Everywhere this was used, it was
used to unconditionally start i/o aside from a couple of places, so
I've removed it and made the couple of exceptions to this rule into
separate functions.

Also hunted through the other DIO flags and removed them as arguments
from functions which were always called with the same combination of
arguments.

Updated gfs2_meta_indirect_buffer to be a bit more efficient and
hopefully also be a bit easier to read.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-09-21 17:05:23 -04:00
Steven Whitehouse
56965536b8 [GFS2] Remove unused constants
Three of the DIO constants were not being used, so remove them.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-09-20 15:48:09 -04:00
Fabio Massimo Di Nitto
7d308590ae [GFS2] Export lm_interface to kernel headers
lm_interface.h has a few out of the tree clients such as GFS1
and userland tools.

Right now, these clients keeps a copy of the file in their build tree
that can go out of sync.

Move lm_interface.h to include/linux, export it to userland and
clean up fs/gfs2 to use the new location.

Signed-off-by: Fabio M. Di Nitto <fabbione@ubuntu.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-09-19 08:45:18 -04:00
Steven Whitehouse
07903c02d0 [GFS2] Tweek unlock test in readpage()
This make the unlock test a bit simpler.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-09-18 17:30:05 -04:00
Russell Cattelan
dc41aeedef [GFS2] Fix for mmap() bug in readpage
Fix for Red Hat bz 205307. Don't need to lock in readpage if
the higher level code has already grabbed the lock.

Signed-off-by: Russell Cattelan <cattelan@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-09-18 17:26:48 -04:00
Steven Whitehouse
7a6bbacbb8 [GFS2] Map multiple blocks at once where possible
This is a tidy up of the GFS2 bmap code. The main change is that the
bh is passed to gfs2_block_map allowing the flags to be set directly
rather than having to repeat that code several times in ops_address.c.

At the same time, the extent mapping code from gfs2_extent_map has
been moved into gfs2_block_map. This allows all calls to gfs2_block_map
to map extents in the case that no allocation is taking place. As a
result reads and non-allocating writes should be faster. A quick test
with postmark appears to support this.

There is a limit on the number of blocks mapped in a single bmap
call in that it will only ever map blocks which are pointed to
from a single pointer block. So in other words, it will never try
to do additional i/o in order to satisfy read-ahead. The maximum
number of blocks is thus somewhat less than 512 (the GFS2 4k block
size minus the header divided by sizeof(u64)). I've further limited
the mapping of "normal" blocks to 32 blocks (to avoid extra work)
since readpages() will currently read a maximum of 32 blocks ahead (128k).

Some further work will probably be needed to set a suitable value
for DIO as well, but for now thats left at the maximum 512 (see
ops_address.c:gfs2_get_block_direct).

There is probably a lot more that can be done to improve bmap for GFS2,
but this is a good first step.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-09-18 17:18:23 -04:00
Steven Whitehouse
0bd5996a00 [GFS2] Style changes in ops_address.c
As per the remainder of Jan Engelhardt's fourth email comments,
remove an cast thats not required. Also tidy up the "limit" code
in stuck_releasepage().

Cc: Jan Engelhardt <jengelh@linux01.gwdg.de>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-09-04 14:59:35 -04:00
Steven Whitehouse
dd538c832a [GFS2] Spelling sentinal -> sentinel
A spelling mistake (one of mine).

Cc: Jan Engelhardt <jengelh@linux01.gwdg.de>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-09-04 14:53:30 -04:00
Steven Whitehouse
cd915493fc [GFS2] Change all types to uX style
This makes all fixed size types have consistent names.

Cc: Jan Engelhardt <jengelh@linux01.gwdg.de>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-09-04 12:49:07 -04:00
Steven Whitehouse
e9fc2aa091 [GFS2] Update copyright, tidy up incore.h
As per comments from Jan Engelhardt <jengelh@linux01.gwdg.de> this
updates the copyright message to say "version" in full rather than
"v.2". Also incore.h has been updated to remove forward structure
declarations which are not required.

The gfs2_quota_lvb structure has now had endianess annotations added
to it. Also quota.c has been updated so that we now store the
lvb data locally in endian independant format to avoid needing
a structure in host endianess too. As a result the endianess
conversions are done as required at various points and thus the
conversion routines in lvb.[ch] are no longer required. I've
moved the one remaining constant in lvb.h thats used into lm.h
and removed the unused lvb.[ch].

I have not changed the HIF_ constants. That is left to a later patch
which I hope will unify the gh_flags and gh_iflags fields of the
struct gfs2_holder.

Cc: Jan Engelhardt <jengelh@linux01.gwdg.de>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-09-01 11:05:15 -04:00
Steven Whitehouse
623d93555c [GFS2] Fix releasepage bug (fixes direct i/o writes)
This patch fixes three main bugs. Firstly the direct i/o get_block
was returning the wrong return code in certain cases. Secondly, the
GFS2's releasepage function was not dealing with cases when clean,
ordered buffers were found still queued on a transaction (which can
happen depending on the ordering of journal flushes). Thirdly, the
journaling code itself needed altering to take account of the
after effects of removing the clean ordered buffers from the transactions
before a journal flush.

The releasepage bug did also show up under "normal" buffered i/o
as well, so its not just a fix for direct i/o. In fact its not
normally used in the direct i/o path at all, except when flushing
existing buffers after performing a direct i/o write, but that was
the code path that led us to spot this.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-08-31 12:14:44 -04:00
Steven Whitehouse
166afccd71 [GFS2] Tidy up error handling in gfs2_releasepage()
This should clarify the logic in gfs2_releasepage() relating to
error handling as well as making the response to errors a bit
more graceful.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-08-24 15:59:40 -04:00
Steven Whitehouse
15d00c0b91 [GFS2] Fix leak of gfs2_bufdata
This fixes a memory leak of struct gfs2_bufdata and also some
problems in the ordered write handling code. It needs a bit
more testing, but I believe that the reference counting of
ordered write buffers should now be correct.

This is aimed at fixing Red Hat bugzilla: #201028 and #201082

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-08-18 15:51:09 -04:00
Steven Whitehouse
f4387149ec [GFS2] Fix lack of buffers in writepage bug
In some cases we can enter write page without there being buffers
attached to the page. In this case the function to add gfs2_bufdata
to the buffers fails sliently causing further failures down the
stack.

This fix ensures that we always add buffers in writepage if they
didn't already exist (mmap is one way to trigger this).

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-08-08 13:23:19 -04:00
Steven Whitehouse
59a1cc6bda [GFS2] Fix lock ordering bug in page fault path
Mmapped files were able to trigger a lock ordering bug. Private
maps do not need to take the glock so early on. Shared maps do
unfortunately, however we can get around that by adding a flag
into the flags for the struct gfs2_file. This only works because
we are taking an exclusive lock at this point, so we know that
nobody else can be racing with us.

Fixes Red Hat bugzilla: #201196

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-08-04 15:41:22 -04:00
Steven Whitehouse
ba7f72901c [GFS2] Remove page.[ch]
The remaining routines in page.c were all only used in one other
file, so they are now moved into the files where they are referenced
and made static. Thus page.[ch] are no longer required.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-07-26 11:27:10 -04:00
Steven Whitehouse
f25ef0c1b4 [GFS2] Tidy gfs2_unstuffer_page
Tidy up gfs2_unstuffer_page by:

 a) Moving it into bmap.c
 b) Making it static
 c) Calling it directly from gfs2_unstuff_dinode
 d) Updating all callers of gfs2_unstuff_dinode due to one less
    required argument.

It doesn't change the behaviour at all.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-07-26 10:51:20 -04:00
Steven Whitehouse
a9e5f4d078 [GFS2] Alter direct I/O path
As per comments received, alter the GFS2 direct I/O path so that
it uses the standard read functions "out of the box". Needs a
small change to one of the VFS functions. This reduces the size
of the code quite a lot and also removes the need for one new export.

Some more work remains to be done, but this is the bones of the
thing.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-07-25 17:24:12 -04:00
Steven Whitehouse
4340fe6253 [GFS2] Add generation number
This adds a generation number for the eventual use of NFS to the
ondisk inode. Its backward compatible with the current code since
it doesn't really matter what the generation number is to start with,
and indeed since its set to zero, due to it being taken from padding
in both the inode and rgrp header, it should be fine.

The eventual plan is to use this rather than no_formal_ino in the
NFS filehandles. At that point no_formal_ino will be unused.

At the same time we also add a releasepages call back to the
"normal" address space for gfs2 inodes. Also I've removed a
one-linrer function thats not required any more.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-07-11 09:46:33 -04:00
Steven Whitehouse
ffeb874b2b [GFS2] Bug fix to gfs2_readpages()
This fixes a bug where we were releasing a page incorrectly
sometimes when reading a stuffed file. This fixes the bug
that Kevin reported when using Xen.

Cc: Kevin Anderson <kanderso@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-07-10 15:47:01 -04:00
Steven Whitehouse
faac9bd0e3 [GFS2] Fix locking for Direct I/O reads
We need to hold i_mutex when doing direct i/o reads.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-07-05 08:24:34 -04:00
Steven Whitehouse
66de045d9f [GFS2] Make our address_space_operations const
As per Christoph's patch:
http://www.kernel.org/git/?p=linux/kernel/git/steve/gfs2-2.6.git;a=commitdiff;h=f5e54d6e53a20cef45af7499e86164f0e0d16bb2

We mark struct address_space_operations const in GFS2.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-07-03 13:37:30 -04:00
Steven Whitehouse
feaa7bba02 [GFS2] Fix unlinked file handling
This patch fixes the way we have been dealing with unlinked,
but still open files. It removes all limits (other than memory
for inodes, as per every other filesystem) on numbers of these
which we can support on GFS2. It also means that (like other
fs) its the responsibility of the last process to close the file
to deallocate the storage, rather than the person who did the
unlinking. Note that with GFS2, those two events might take place
on different nodes.

Also there are a number of other changes:

 o We use the Linux inode subsystem as it was intended to be
used, wrt allocating GFS2 inodes
 o The Linux inode cache is now the point which we use for
local enforcement of only holding one copy of the inode in
core at once (previous to this we used the glock layer).
 o We no longer use the unlinked "special" file. We just ignore it
completely. This makes unlinking more efficient.
 o We now use the 4th block allocation state. The previously unused
state is used to track unlinked but still open inodes.
 o gfs2_inoded is no longer needed
 o Several fields are now no longer needed (and removed) from the in
core struct gfs2_inode
 o Several fields are no longer needed (and removed) from the in core
superblock

There are a number of future possible optimisations and clean ups
which have been made possible by this patch.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-06-14 15:32:57 -04:00
Steven Whitehouse
3a8a9a1034 [GFS2] Update copyright date to 2006
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-05-18 15:09:15 -04:00
Steven Whitehouse
bd8968010a [GFS2] Remove semaphore.h from C files
We no longer use semaphores, everything has been converted to
mutex or rwsem, so we don't need to include this header any more.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-05-18 14:54:58 -04:00
Steven Whitehouse
fd88de569b [GFS2] Readpages support
This adds readpages support (and also corrects a small bug in
the readpage error path at the same time). Hopefully this will
improve performance by allowing GFS to submit larger lumps of
I/O at a time.

In order to simplify the setting of BH_Boundary, it currently gets
set when we hit the end of a indirect pointer block. There is
always a boundary at this point with the current allocation code.
It doesn't get all the boundaries right though, so there is still
room for improvement in this.

See comments in fs/gfs2/ops_address.c for further information about
readpages with GFS2.

Signed-off-by: Steven Whitehouse
2006-05-05 16:59:11 -04:00
Steven Whitehouse
d2d7b8a2a7 [GFS2] Fix bug in writepage()
As pointed out by Wendy Cheng, the logic in GFS2's writepage() function
wasn't quite right with respect to invalidating pages when a file has been
truncated. This patch fixes that.

CC: Wendy Cheng <wcheng@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-05-02 12:09:42 -04:00
Steven Whitehouse
fe1bdedc6c [GFS2] Use vmalloc() in dir code
When allocating memory to sort directory entries, use vmalloc()
rather than kmalloc() since for larger directories, the required
size can easily be graeter than the 128k maximum of kmalloc().

Also adding the first steps towards getting the AOP_TRUNCATED_PAGE
return code get in the glock code by flagging all places where we
request a glock and we are holding a page lock.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-04-18 10:09:15 -04:00
Steven Whitehouse
8628de0583 [GFS2] Update GFS2 for the recent pull from Linus
Some interfaces have changed. In particular one of the posix
locking functions has changed prototype, along with the
address space operation invalidatepage and the block getting
callback to the direct IO function.

In addition add the splice file operations. These will need to
be updated to support AOP_TRUNCATED_PAGE before they will be
of much use to us.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-03-31 16:48:41 -05:00
Steven Whitehouse
5c676f6d35 [GFS2] Macros removal in gfs2.h
As suggested by Pekka Enberg <penberg@cs.helsinki.fi>.

The DIV_RU macro is renamed DIV_ROUND_UP and and moved to kernel.h
The other macros are gone from gfs2.h as (although not requested
by Pekka Enberg) are a number of included header file which are now
included individually. The inode number comparison function is
now an inline function.

The DT2IF and IF2DT may be addressed in a future patch.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-02-27 17:23:27 -05:00
Steven Whitehouse
568f4c9659 [GFS2] 80 Column audit of GFS2
Requested by:
Prarit Bhargava <prarit@redhat.com>

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-02-27 12:00:42 -05:00
David Teigland
6a6b3d018f [GFS2] Patch to remove stats gathering from GFS2
Signed-off-by: David Teigland <teigland@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-02-23 10:11:47 +00:00
Steven Whitehouse
f55ab26a8f [GFS2] Use mutices rather than semaphores
As well as a number of minor bug fixes, this patch changes GFS
to use mutices rather than semaphores. This results in better
information in case there are any locking problems.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-02-21 12:51:39 +00:00
Steven Whitehouse
5c4e9e0366 [GFS2] Fix a case where we didn't get unstuffing right
There was a bug in the unstuffing logic which caused a crash
under certain circumstances. This is now fixed.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-02-15 12:26:19 +00:00
Steven Whitehouse
61a30dcb58 [GFS2] Fix for lock recursion problem for internal files
Two internal files which are read through the gfs2_internal_read()
routine were already locked when the routine was called and this
do not need locking at the redapages level.

This patch introduces a struct file which is used as a sentinal
so that readpage will only perform locking in the case that the
struct file passed to it is _not_ equal to this sentinal.

Since the comments in the generic kernel code indicate that the
struct file will never be used for anything other than passing
straight through to readpage(), this should be ok.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-02-15 10:15:18 +00:00
Steven Whitehouse
d1665e4142 [GFS2] Put back O_DIRECT support
This patch adds back O_DIRECT support with various caveats
attached:

 1. Journaled data can be read via O_DIRECT since its now the
    same on disk format as normal data files.
 2. Journaled data writes with O_DIRECT will be failed sliently
    back to normal writes (should we really do this I wonder or
    should we return an error instead?)
 3. Stuffed files will be failed back to normal buffered I/O
 4. All the usual corner cases (write beyond current end of file,
    write to an unallocated block) will also revert to normal buffered I/O.

The I/O path is slightly odd as reads arrive at the page cache layer
with the lock for the file already held, but writes arrive unlocked.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-02-14 11:54:42 +00:00