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path: root/fs/gfs2/meta_io.c
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2007-02-11[PATCH] Transform kmem_cache_alloc()+memset(0) -> kmem_cache_zalloc().Robert P. J. Day
Replace appropriate pairs of "kmem_cache_alloc()" + "memset(0)" with the corresponding "kmem_cache_zalloc()" call. Signed-off-by: Robert P. J. Day <rpjday@mindspring.com> Cc: "Luck, Tony" <tony.luck@intel.com> Cc: Andi Kleen <ak@muc.de> Cc: Roland McGrath <roland@redhat.com> Cc: James Bottomley <James.Bottomley@steeleye.com> Cc: Greg KH <greg@kroah.com> Acked-by: Joel Becker <Joel.Becker@oracle.com> Cc: Steven Whitehouse <swhiteho@redhat.com> Cc: Jan Kara <jack@ucw.cz> Cc: Michael Halcrow <mhalcrow@us.ibm.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Stephen Smalley <sds@tycho.nsa.gov> Cc: James Morris <jmorris@namei.org> Cc: Chris Wright <chrisw@sous-sol.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2006-11-30[GFS2] Reduce number of arguments to meta_io.c:getbuf()Steven Whitehouse
Since the superblock and the address_space are determined by the glock, we might as well just pass that as the argument since all the callers already have that available. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-11-30[GFS2] Move gfs2_meta_syncfs() into log.cSteven Whitehouse
By moving gfs2_meta_syncfs() into log.c, gfs2_ail1_start() can be made static. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-11-30[GFS2] Fix journal flush problemSteven Whitehouse
This fixes a bug which resulted in poor performance due to flushing the journal too often. The code path in question was via the inode_go_sync() function in glops.c. The solution is not to flush the journal immediately when inodes are ejected from memory, but batch up the work for glockd to deal with later on. This means that glocks may now live on beyond the end of the lifetime of their inodes (but not very much longer in the normal case). Also fixed in this patch is a bug (which was hidden by the bug mentioned above) in calculation of the number of free journal blocks. The gfs2_logd process has been altered to be more responsive to the journal filling up. We now wake it up when the number of uncommitted journal blocks has reached the threshold level rather than trying to flush directly at the end of each transaction. This again means doing fewer, but larger, log flushes in general. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-10-03[GFS2] Move logging code into log.c (mostly)Steven Whitehouse
This moves the logging code from meta_io.c into log.c and glops.c. As a result the routines can now be static and all the logging code is together in log.c, leaving meta_io.c with just metadata i/o code in it. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-10-02[GFS2] Mark metadata reads for blktraceSteven Whitehouse
Mark the metadata reads so that blktrace knows what they are. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-09-28[GFS2] inode_diet: Replace inode.u.generic_ip with inode.i_private (gfs)Theodore Ts'o
The following patches reduce the size of the VFS inode structure by 28 bytes on a UP x86. (It would be more on an x86_64 system). This is a 10% reduction in the inode size on a UP kernel that is configured in a production mode (i.e., with no spinlock or other debugging functions enabled; if you want to save memory taken up by in-core inodes, the first thing you should do is disable the debugging options; they are responsible for a huge amount of bloat in the VFS inode structure). This patch: The filesystem or device-specific pointer in the inode is inside a union, which is pretty pointless given that all 30+ users of this field have been using the void pointer. Get rid of the union and rename it to i_private, with a comment to explain who is allowed to use the void pointer. This is just a cleanup, but it allows us to reuse the union 'u' for something something where the union will actually be used. Signed-off-by: "Theodore Ts'o" <tytso@mit.edu> Cc: Steven Whitehouse <swhiteho@redhat.com> Signed-off-by: Andrew Morton <akpm@osdl.org>
2006-09-21[GFS2] Tidy up meta_io codeSteven Whitehouse
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>
2006-09-20[GFS2] Remove unused constantsSteven Whitehouse
Three of the DIO constants were not being used, so remove them. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-09-19[GFS2] Export lm_interface to kernel headersFabio Massimo Di Nitto
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>
2006-09-04[GFS2] More style changesSteven Whitehouse
As per Jan Engelhardt's fourth email, this is the first part of the change set with a few minor style points. Cc: Jan Engelhardt <jengelh@linux01.gwdg.de> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-09-04[GFS2] Change all types to uX styleSteven Whitehouse
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[GFS2] Align all labels against LH sideSteven Whitehouse
This makes everything consistent. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-09-01[GFS2] Update copyright, tidy up incore.hSteven Whitehouse
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>
2006-08-18[GFS2] Fix leak of gfs2_bufdataSteven Whitehouse
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>
2006-07-11[GFS2] Fix deadlock in memory allocationSteven Whitehouse
We must not call GFP_KERNEL memory allocations while we are holding the log lock (read or write) since that may trigger a log flush resulting in a deadlock. Eventually we need to fix the locking in log.c, for now this solves the problem at the expense of freeing up memory as fast as we would like to. This needs to be revisited later on. Cc: Kevin Anderson <kanderso@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-07-11[GFS2] Add generation numberSteven Whitehouse
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>
2006-07-03[GFS2] Make our address_space_operations constSteven Whitehouse
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>
2006-06-14[GFS2] Fix unlinked file handlingSteven Whitehouse
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>
2006-05-24[GFS2] Casts for printing 64bit numbersSteven Whitehouse
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-05-18[GFS2] Update copyright date to 2006Steven Whitehouse
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-05-18[GFS2] Remove semaphore.h from C filesSteven Whitehouse
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[GFS2] Drop log lock on I/O error & tidy upSteven Whitehouse
This patch drops the log spinlock when an I/O error occurs to avoid any possible problems in case of blocking or recursion in the I/O error routine. It also has a few cosmetic changes to tidy up various other files. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-04-20[GFS2] Fix a bug: scheduling under a spinlockSteven Whitehouse
At some stage, a mutex was added to gfs2_glock_put() without checking all its call sites. Two of them were called from under a spinlock causing random delays at various points and crashes. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-04-18[GFS2] Use vmalloc() in dir codeSteven Whitehouse
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>
2006-04-07[GFS2] Fix a ref count bug and other clean upsSteven Whitehouse
This fixes a ref count bug that sometimes showed up a umount time (causing it to hang) but it otherwise mostly harmless. At the same time there are some clean ups including making the log operations structures const, moving a memory allocation so that its not done in the fast path of checking to see if there is an outstanding transaction related to a particular glock. Removes the sd_log_wrap varaible which was updated, but never actually used anywhere. Updates the gfs2 ioctl() to run without the kernel lock (which it never needed anyway). Removes the "invalidate inodes" loop from GFS2's put_super routine. This is done in kill super anyway so we don't need to do it here. The loop was also bogus in that if there are any inodes "stuck" at this point its a bug and we need to know about it rather than hide it by hanging forever. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-02-27[GFS2] Macros removal in gfs2.hSteven Whitehouse
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[GFS2] 80 Column audit of GFS2Steven Whitehouse
Requested by: Prarit Bhargava <prarit@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-02-23[GFS2] Patch to remove stats gathering from GFS2David Teigland
Signed-off-by: David Teigland <teigland@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-02-21[GFS2] Use mutices rather than semaphoresSteven Whitehouse
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>
2006-02-08[GFS2] Make journaled data files identical to normal files on diskSteven Whitehouse
This is a very large patch, with a few still to be resolved issues so you might want to check out the previous head of the tree since this is known to be unstable. Fixes for the various bugs will be forthcoming shortly. This patch removes the special data format which has been used up till now for journaled data files. Directories still retain the old format so that they will remain on disk compatible with earlier releases. As a result you can now do the following with journaled data files: 1) mmap them 2) export them over NFS 3) convert to/from normal files whenever you want to (the zero length restriction is gone) In addition the level at which GFS' locking is done has changed for all files (since they all now use the page cache) such that the locking is done at the page cache level rather than the level of the fs operations. This should mean that things like loopback mounts and other things which touch the page cache directly should now work. Current known issues: 1. There is a lock mode inversion problem related to the resource group hold function which needs to be resolved. 2. Any significant amount of I/O causes an oops with an offset of hex 320 (NULL pointer dereference) which appears to be related to a journaled data buffer appearing on a list where it shouldn't be. 3. Direct I/O writes are disabled for the time being (will reappear later) 4. There is probably a deadlock between the page lock and GFS' locks under certain combinations of mmap and fs operation I/O. 5. Issue relating to ref counting on internally used inodes causes a hang on umount (discovered before this patch, and not fixed by it) 6. One part of the directory metadata is different from GFS1 and will need to be resolved before next release. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-01-18[GFS2] Rename gfs2_meta_pin to gfs2_pinSteven Whitehouse
Since we'll need to pin data if we are going to journal it, then I'm renaming this function to make it less confusing. It might also be worth moving it into lops.c since there are no users outside that file. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-01-18[GFS2] Make the new argument to gfs2_trans_add_bh() actually do somethingSteven Whitehouse
Passes the flag through to ensure that the correct log operations are invoked when the flag is set. Signed-off-by: Steven Whitehouse: <swhiteho@redhat.com>
2006-01-18[GFS2] Add an additional argument to gfs2_trans_add_bh()Steven Whitehouse
This adds an extra argument to gfs2_trans_add_bh() to indicate whether the bh being added to the transaction is metadata or data. Its currently unused since all existing callers set it to 1 (metadata) but following patches will make use of it. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
2006-01-16[GFS2] The core of GFS2David Teigland
This patch contains all the core files for GFS2. Signed-off-by: David Teigland <teigland@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>