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* GFS2: Post-VFS scale update for RCU path walkSteven Whitehouse2011-01-211-2/+5
| | | | | | | | | | We can allow a few more cases to use RCU path walking than originally allowed. It should be possible to also enable RCU path walking when the glock is already cached. Thats a bit more complicated though, so left for a future patch. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com> Cc: Nick Piggin <npiggin@gmail.com>
* fs: provide rcu-walk aware permission i_opsNick Piggin2011-01-071-1/+4
| | | | Signed-off-by: Nick Piggin <npiggin@kernel.dk>
* Merge git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-2.6-fixesLinus Torvalds2010-05-251-0/+4
|\ | | | | | | | | | | | | * git://git.kernel.org/pub/scm/linux/kernel/git/steve/gfs2-2.6-fixes: GFS2: Fix permissions checking for setflags ioctl() GFS2: Don't "get" xattrs for ACLs when ACLs are turned off GFS2: Rework reclaiming unlinked dinodes
| * GFS2: Don't "get" xattrs for ACLs when ACLs are turned offSteven Whitehouse2010-05-211-0/+4
| | | | | | | | | | | | | | | | This is to match ext3 behaviour. We should not allow getting of xattrs relating to ACLs when ACLs are turned off. Reported-by: Nate Straz <nstraz@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
* | gfs: constify xattr_handlerStephen Hemminger2010-05-211-1/+1
|/ | | | | Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* sanitize xattr handler prototypesChristoph Hellwig2009-12-161-6/+10
| | | | | | | | | | | | | | | | | | | | | Add a flags argument to struct xattr_handler and pass it to all xattr handler methods. This allows using the same methods for multiple handlers, e.g. for the ACL methods which perform exactly the same action for the access and default ACLs, just using a different underlying attribute. With a little more groundwork it'll also allow sharing the methods for the regular user/trusted/secure handlers in extN, ocfs2 and jffs2 like it's already done for xfs in this patch. Also change the inode argument to the handlers to a dentry to allow using the handlers mechnism for filesystems that require it later, e.g. cifs. [with GFS2 bits updated by Steven Whitehouse <swhiteho@redhat.com>] Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: James Morris <jmorris@namei.org> Acked-by: Joel Becker <joel.becker@oracle.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* GFS2: Add cached ACLs supportSteven Whitehouse2009-12-031-2/+25
| | | | | | | | | | The other patches in this series have been building towards being able to support cached ACLs like other filesystems. The only real difference with GFS2 is that we have to invalidate the cache when we drop a glock, but that is dealt with in earlier patches. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
* GFS2: Clean up ACLsSteven Whitehouse2009-12-031-81/+83
| | | | | | | | | To prepare for support for caching of ACLs, this cleans up the GFS2 ACL support by pushing the xattr code back into xattr.c and changing the acl_get function into one which only returns ACLs so that we can drop the caching function into it shortly. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
* GFS2: Use gfs2_set_mode() instead of munge_mode()Steven Whitehouse2009-12-031-35/+11
| | | | | | | These two functions do the same thing, so lets only use one of them. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
* GFS2: Fix up system xattrsSteven Whitehouse2009-12-031-55/+115
| | | | | | | | | | This code has been shamelessly stolen from XFS at the suggestion of Christoph Hellwig. I've not added support for cached ACLs so far... watch for that in a later patch, although this is designed in such a way that they should be easy to add. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com> Cc: Christoph Hellwig <hch@infradead.org>
* GFS2: Rename eattr.[ch] as xattr.[ch]Steven Whitehouse2009-08-261-1/+1
| | | | | | | Use the more conventional name for the extended attribute support code. Update all the places which care. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
* GFS2: Clean up of extended attribute supportSteven Whitehouse2009-08-261-59/+45
| | | | | | | | | | | | | | | | | | | | | This has been on my list for some time. We need to change the way in which we handle extended attributes to allow faster file creation times (by reducing the number of transactions required) and the extended attribute code is the main obstacle to this. In addition to that, the VFS provides a way to demultiplex the xattr calls which we ought to be using, rather than rolling our own. This patch changes the GFS2 code to use that VFS feature and as a result the code shrinks by a couple of hundred lines or so, and becomes easier to read. I'm planning on doing further clean up work in this area, but this patch is a good start. The cleaned up code also uses the more usual "xattr" shorthand, I plan to eliminate the use of "eattr" eventually and in the mean time it serves as a flag as to which bits of the code have been updated. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
* New helper - current_umask()Al Viro2009-03-311-1/+1
| | | | | | | current->fs->umask is what most of fs_struct users are doing. Put that into a helper function. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* GFS2: Merge lock_dlm module into GFS2Steven Whitehouse2009-03-241-1/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | This is the big patch that I've been working on for some time now. There are many reasons for wanting to make this change such as: o Reducing overhead by eliminating duplicated fields between structures o Simplifcation of the code (reduces the code size by a fair bit) o The locking interface is now the DLM interface itself as proposed some time ago. o Fewer lookups of glocks when processing replies from the DLM o Fewer memory allocations/deallocations for each glock o Scope to do further optimisations in the future (but this patch is more than big enough for now!) Please note that (a) this patch relates to the lock_dlm module and not the DLM itself, that is still a separate module; and (b) that we retain the ability to build GFS2 as a standalone single node filesystem with out requiring the DLM. This patch needs a lot of testing, hence my keeping it I restarted my -git tree after the last merge window. That way, this has the maximum exposure before its merged. This is (modulo a few minor bug fixes) the same patch that I've been posting on and off the the last three months and its passed a number of different tests so far. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
* GFS2: Move di_eattr into "proper" inodeSteven Whitehouse2009-01-051-1/+1
| | | | | | | This moves the di_eattr field out of gfs2_inode_host and into the inode proper. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
* [GFS2] fix GFP_KERNEL misusesJosef Bacik2008-04-101-3/+3
| | | | | | | | | | | There are several places where GFP_KERNEL allocations happen under a glock, which will result in hangs if we're under memory pressure and go to re-enter the fs in order to flush stuff out. This patch changes the culprits to GFS_NOFS to keep this problem from happening. Thank you, Signed-off-by: Josef Bacik <jbacik@redhat.com> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
* Introduce is_owner_or_cap() to wrap CAP_FOWNER use with fsuid checkSatyam Sharma2007-07-171-1/+1
| | | | | | | | | | | | | | | | | | | | Introduce is_owner_or_cap() macro in fs.h, and convert over relevant users to it. This is done because we want to avoid bugs in the future where we check for only effective fsuid of the current task against a file's owning uid, without simultaneously checking for CAP_FOWNER as well, thus violating its semantics. [ XFS uses special macros and structures, and in general looked ... untouchable, so we leave it alone -- but it has been looked over. ] The (current->fsuid != inode->i_uid) check in generic_permission() and exec_permission_lite() is left alone, because those operations are covered by CAP_DAC_OVERRIDE and CAP_DAC_READ_SEARCH. Similarly operations falling under the purview of CAP_CHOWN and CAP_LEASE are also left alone. Signed-off-by: Satyam Sharma <ssatyam@cse.iitk.ac.in> Cc: Al Viro <viro@ftp.linux.org.uk> Acked-by: Serge E. Hallyn <serge@hallyn.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* [GFS2] Remove gfs2_check_acl()Steven Whitehouse2006-11-301-17/+2
| | | | | | | | | As pointed out by Adrian Bunk, the gfs2_check_acl() function is no longer used. This patch removes it and renamed gfs2_check_acl_locked() to gfs2_check_acl() since we only need one variant of that function now. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com> Cc: Adrian Bunk <bunk@stusta.de>
* [GFS2] Shrink gfs2_inode (4) - di_uid/di_gidSteven Whitehouse2006-11-301-1/+1
| | | | | | | 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>
* [GFS2] Shrink gfs2_inode (3) - di_modeSteven Whitehouse2006-11-301-8/+8
| | | | | | | 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>
* [GFS2] Change argument of gfs2_dinode_outSteven Whitehouse2006-11-301-1/+1
| | | | | | | | | | Everywhere this was called, a struct gfs2_inode was available, but despite that, it was always called with a struct gfs2_dinode as an argument. By making this change it paves the way to start eliminating fields duplicated between the kernel's struct inode and the struct gfs2_dinode. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
* [GFS2/DLM] Fix trailing whitespaceSteven Whitehouse2006-09-251-1/+1
| | | | | | | As per Andrew Morton's request, removed trailing whitespace. Cc: Andrew Morton <akpm@osdl.org> Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
* [GFS2] Export lm_interface to kernel headersFabio Massimo Di Nitto2006-09-191-1/+1
| | | | | | | | | | | | | | | 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>
* [GFS2] Align all labels against LH sideSteven Whitehouse2006-09-041-9/+5
| | | | | | This makes everything consistent. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
* [GFS2] Update copyright, tidy up incore.hSteven Whitehouse2006-09-011-1/+1
| | | | | | | | | | | | | | | | | | | | | | | 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>
* [GFS2] Remove gfs2_repermissionSteven Whitehouse2006-06-221-3/+1
| | | | | | | gfs2_repermission is just a wrapper for permission, so remove it and call permission directly where required. Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
* [GFS2] Fix unlinked file handlingSteven Whitehouse2006-06-141-5/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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>
* [GFS2] Update copyright date to 2006Steven Whitehouse2006-05-181-1/+1
| | | | Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
* [GFS2] Remove semaphore.h from C filesSteven Whitehouse2006-05-181-1/+0
| | | | | | | 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>
* [GFS2] Macros removal in gfs2.hSteven Whitehouse2006-02-271-2/+6
| | | | | | | | | | | | | | 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>
* [GFS2] Add an additional argument to gfs2_trans_add_bh()Steven Whitehouse2006-01-181-1/+1
| | | | | | | | | 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>
* [GFS2] The core of GFS2David Teigland2006-01-161-0/+312
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>
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