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* Merge branch 'for-linus' of ↵Linus Torvalds2009-12-1820-914/+1171
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable: Btrfs: make sure fallocate properly starts a transaction Btrfs: make metadata chunks smaller Btrfs: Show discard option in /proc/mounts Btrfs: deny sys_link across subvolumes. Btrfs: fail mount on bad mount options Btrfs: don't add extent 0 to the free space cache v2 Btrfs: Fix per root used space accounting Btrfs: Fix btrfs_drop_extent_cache for skip pinned case Btrfs: Add delayed iput Btrfs: Pass transaction handle to security and ACL initialization functions Btrfs: Make truncate(2) more ENOSPC friendly Btrfs: Make fallocate(2) more ENOSPC friendly Btrfs: Avoid orphan inodes cleanup during committing transaction Btrfs: Avoid orphan inodes cleanup while replaying log Btrfs: Fix disk_i_size update corner case Btrfs: Rewrite btrfs_drop_extents Btrfs: Add btrfs_duplicate_item Btrfs: Avoid superfluous tree-log writeout
| * Merge branch 'master' of ↵Chris Mason2009-12-171-4/+9
| |\ | | | | | | | | | ssh://master.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable into for-linus
| | * Btrfs: make sure fallocate properly starts a transactionChris Mason2009-12-171-4/+9
| | | | | | | | | | | | | | | | | | | | | | | | The recent patch to make fallocate enospc friendly would send down a NULL trans handle to the allocator. This moves the transaction start to properly fix things. Signed-off-by: Chris Mason <chris.mason@oracle.com>
| * | Merge branch btrfs-master into for-linusChris Mason2009-12-1720-916/+1168
| |\| | | | | | | | | | | | | Conflicts: fs/btrfs/acl.c
| | * Btrfs: make metadata chunks smallerJosef Bacik2009-12-172-11/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch makes us a bit less zealous about making sure we have enough free metadata space by pearing down the size of new metadata chunks to 256mb instead of 1gb. Also, we used to try an allocate metadata chunks when allocating data, but that sort of thing is done elsewhere now so we can just remove it. With my -ENOSPC test I used to have 3gb reserved for metadata out of 75gb, now I have 1.7gb. Thanks, Signed-off-by: Josef Bacik <josef@redhat.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
| | * Btrfs: Show discard option in /proc/mountsMatthew Wilcox2009-12-171-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | Christoph's patch e244a0aeb6a599c19a7c802cda6e2d67c847b154 doesn't display the discard option in /proc/mounts, leading to some confusion for me. Here's the missing bit. Signed-off-by: Matthew Wilcox <willy@linux.intel.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
| | * Btrfs: deny sys_link across subvolumes.TARUISI Hiroaki2009-12-171-0/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | I rebased Christian Parpart's patch to deny hard link across subvolumes. Original patch modifies also btrfs_rename, but I excluded it because we can move across subvolumes now and it make no problem. ----------------- Hard link across subvolumes should not allowed in Btrfs. btrfs_link checks root of 'to' directory is same as root of 'from' file. If not same, btrfs_link returns -EPERM. Signed-off-by: TARUISI Hiroaki <taruishi.hiroak@jp.fujitsu.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
| | * Btrfs: fail mount on bad mount optionsSage Weil2009-12-171-1/+8
| | | | | | | | | | | | | | | | | | | | | We shouldn't silently ignore unrecognized options. Signed-off-by: Sage Weil <sage@newdream.net> Signed-off-by: Chris Mason <chris.mason@oracle.com>
| | * Btrfs: don't add extent 0 to the free space cache v2Yan, Zheng2009-12-171-1/+9
| | | | | | | | | | | | | | | | | | | | | | | | If block group 0 is completely free, btrfs_read_block_groups will add extent [0, BTRFS_SUPER_INFO_OFFSET) to the free space cache. Signed-off-by: Yan Zheng <zheng.yan@oracle.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
| | * Btrfs: Fix per root used space accountingYan, Zheng2009-12-175-27/+47
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The bytes_used field in root item was originally planned to trace the amount of used data and tree blocks. But it never worked right since we can't trace freeing of data accurately. This patch changes it to only trace the amount of tree blocks. Signed-off-by: Yan Zheng <zheng.yan@oracle.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
| | * Btrfs: Fix btrfs_drop_extent_cache for skip pinned caseYan, Zheng2009-12-171-7/+3
| | | | | | | | | | | | | | | | | | | | | | | | The check for skip pinned case is wrong, it may breaks the while loop too soon. Signed-off-by: Yan Zheng <zheng.yan@oracle.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
| | * Btrfs: Add delayed iputYan, Zheng2009-12-179-18/+90
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | iput() can trigger new transactions if we are dropping the final reference, so calling it in btrfs_commit_transaction may end up deadlock. This patch adds delayed iput to avoid the issue. Signed-off-by: Yan Zheng <zheng.yan@oracle.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
| | * Btrfs: Pass transaction handle to security and ACL initialization functionsYan, Zheng2009-12-176-63/+96
| | | | | | | | | | | | | | | | | | | | | | | | Pass transaction handle down to security and ACL initialization functions, so we can avoid starting nested transactions Signed-off-by: Yan Zheng <zheng.yan@oracle.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
| | * Btrfs: Make truncate(2) more ENOSPC friendlyYan, Zheng2009-12-172-137/+212
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | truncating and deleting regular files are unbound operations, so it's not good to do them in a single transaction. This patch makes btrfs_truncate and btrfs_delete_inode start a new transaction after all items in a tree leaf are deleted. Signed-off-by: Yan Zheng <zheng.yan@oracle.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
| | * Btrfs: Make fallocate(2) more ENOSPC friendlyYan, Zheng2009-12-171-33/+32
| | | | | | | | | | | | | | | | | | | | | | | | | | | fallocate(2) may allocate large number of file extents, so it's not good to do it in a single transaction. This patch make fallocate(2) start a new transaction for each file extents it allocates. Signed-off-by: Yan Zheng <zheng.yan@oracle.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
| | * Btrfs: Avoid orphan inodes cleanup during committing transactionYan, Zheng2009-12-172-16/+17
| | | | | | | | | | | | | | | | | | | | | | | | btrfs_lookup_dentry may trigger orphan cleanup, so it's not good to call it while committing a transaction. Signed-off-by: Yan Zheng <zheng.yan@oracle.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
| | * Btrfs: Avoid orphan inodes cleanup while replaying logYan, Zheng2009-12-175-36/+55
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We do log replay in a single transaction, so it's not good to do unbound operations. This patch cleans up orphan inodes cleanup after replaying the log. It also avoids doing other unbound operations such as truncating a file during replaying log. These unbound operations are postponed to the orphan inode cleanup stage. Signed-off-by: Yan Zheng <zheng.yan@oracle.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
| | * Btrfs: Fix disk_i_size update corner caseYan, Zheng2009-12-174-56/+127
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | There are some cases file extents are inserted without involving ordered struct. In these cases, we update disk_i_size directly, without checking pending ordered extent and DELALLOC bit. This patch extends btrfs_ordered_update_i_size() to handle these cases. Signed-off-by: Yan Zheng <zheng.yan@oracle.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
| | * Btrfs: Rewrite btrfs_drop_extentsYan, Zheng2009-12-165-423/+277
| | | | | | | | | | | | | | | | | | | | | | | | Rewrite btrfs_drop_extents by using btrfs_duplicate_item, so we can avoid calling lock_extent within transaction. Signed-off-by: Yan Zheng <zheng.yan@oracle.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
| | * Btrfs: Add btrfs_duplicate_itemYan, Zheng2009-12-162-59/+143
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | btrfs_duplicate_item duplicates item with new key, guaranteeing the source item and the new items are in the same tree leaf and contiguous. It allows us to split file extent in place, without using lock_extent to prevent bookend extent race. Signed-off-by: Yan Zheng <zheng.yan@oracle.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
| | * Btrfs: Avoid superfluous tree-log writeoutYan, Zheng2009-12-165-31/+47
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We allow two log transactions at a time, but use same flag to mark dirty tree-log btree blocks. So we may flush dirty blocks belonging to newer log transaction when committing a log transaction. This patch fixes the issue by using two flags to mark dirty tree-log btree blocks. Signed-off-by: Yan Zheng <zheng.yan@oracle.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
* | | mm: introduce coredump parameter structureMasami Hiramatsu2009-12-186-52/+60
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Introduce coredump parameter data structure (struct coredump_params) to simplify binfmt->core_dump() arguments. Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com> Suggested-by: Ingo Molnar <mingo@elte.hu> Cc: Hidehiro Kawai <hidehiro.kawai.ez@hitachi.com> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Roland McGrath <roland@redhat.com> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | do_wait() optimization: do not place sub-threads on task_struct->children listOleg Nesterov2009-12-181-0/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Thanks to Roland who pointed out de_thread() issues. Currently we add sub-threads to ->real_parent->children list. This buys nothing but slows down do_wait(). With this patch ->children contains only main threads (group leaders). The only complication is that forget_original_parent() should iterate over sub-threads by hand, and de_thread() needs another list_replace() when it changes ->group_leader. Henceforth do_wait_thread() can never see task_detached() && !EXIT_DEAD tasks, we can remove this check (and we can unify do_wait_thread() and ptrace_do_wait()). This change can confuse the optimistic search in mm_update_next_owner(), but this is fixable and minor. Perhaps badness() and oom_kill_process() should be updated, but they should be fixed in any case. Signed-off-by: Oleg Nesterov <oleg@redhat.com> Cc: Roland McGrath <roland@redhat.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Ratan Nalumasu <rnalumasu@gmail.com> Cc: Vitaly Mayatskikh <vmayatsk@redhat.com> Cc: David Rientjes <rientjes@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | nommu: ramfs: remove unused local varMike Frysinger2009-12-181-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | Signed-off-by: Mike Frysinger <vapier@gentoo.org> Cc: David Howells <dhowells@redhat.com> Acked-by: Greg Ungerer <gerg@snapgear.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | reiserfs: truncate blocks not used by a writeJan Kara2009-12-181-4/+14
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | It can happen that write does not use all the blocks allocated in write_begin either because of some filesystem error (like ENOSPC) or because page with data to write has been removed from memory. We truncate these blocks so that we don't have dangling blocks beyond i_size. Cc: Jeff Mahoney <jeffm@suse.com> Signed-off-by: Jan Kara <jack@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | Revert "task_struct: make journal_info conditional"Linus Torvalds2009-12-178-11/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This reverts commit e4c570c4cb7a95dbfafa3d016d2739bf3fdfe319, as requested by Alexey: "I think I gave a good enough arguments to not merge it. To iterate: * patch makes impossible to start using ext3 on EXT3_FS=n kernels without reboot. * this is done only for one pointer on task_struct" None of config options which define task_struct are tristate directly or effectively." Requested-by: Alexey Dobriyan <adobriyan@gmail.com> Acked-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | Revert "fix mismerge with Trond's stuff (create_mnt_ns() export is gone now)"Linus Torvalds2009-12-172-1/+10
|/ / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This reverts commit e9496ff46a20a8592fdc7bdaaf41b45eb808d310. Quoth Al: "it's dependent on a lot of other stuff not currently in mainline and badly broken with current fs/namespace.c. Sorry, badly out-of-order cherry-pick from old queue. PS: there's a large pending series reworking the refcounting and lifetime rules for vfsmounts that will, among other things, allow to rip a subtree away _without_ dissolving connections in it, to be garbage-collected when all active references are gone. It's considerably saner wrt "is the subtree busy" logics, but it's nowhere near being ready for merge at the moment; this changeset is one of the things becoming possible with that sucker, but it certainly shouldn't have been picked during this cycle. My apologies..." Noticed-by: Eric Paris <eparis@redhat.com> Requested-by: Al Viro <viro@ZenIV.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | kill I_LOCKChristoph Hellwig2009-12-177-22/+22
| | | | | | | | | | | | | | | | After I_SYNC was split from I_LOCK the leftover is always used together with I_NEW and thus superflous. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | fold do_sync_file_range into sys_sync_file_rangeChristoph Hellwig2009-12-171-36/+23
| | | | | | | | | | | | | | | | | | | | | | | | We recently go rid of all callers of do_sync_file_range as they're better served with vfs_fsync or the filemap_write_and_wait. Now that do_sync_file_range is down to a single caller fold it into it so that people don't start using it again accidentally. While at it also switch it from using __filemap_fdatawrite_range(..., WB_SYNC_ALL) to the more clear filemap_fdatawrite_range(). Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | VFS/fsstack: handle 32-bit smp + preempt + large files in ↵Erez Zadok2009-12-171-3/+51
| | | | | | | | | | | | | | | | | | | | | | | | fsstack_copy_inode_size Copy the inode size and blocks from one inode to another correctly on 32-bit systems with CONFIG_SMP, CONFIG_PREEMPT, or CONFIG_LBDAF. Use proper inode spinlocks only when i_size/i_blocks cannot fit in one 32-bit word. Signed-off-by: Hugh Dickins <hugh.dickins@tiscali.co.uk> Signed-off-by: Erez Zadok <ezk@cs.sunysb.edu> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | fsstack/ecryptfs: remove unused get_nlinks param to fsstack_copy_attr_allErez Zadok2009-12-174-19/+8
| | | | | | | | | | | | | | | | | | | | This get_nlinks parameter was never used by the only mainline user, ecryptfs; and it has never been used by unionfs or wrapfs either. Acked-by: Dustin Kirkland <kirkland@canonical.com> Acked-by: Tyler Hicks <tyhicks@linux.vnet.ibm.com> Signed-off-by: Erez Zadok <ezk@cs.sunysb.edu> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | vfs: remove extraneous NULL d_inode check from do_filp_openJeff Layton2009-12-171-1/+1
| | | | | | | | | | | | | | | | | | | | We can't get to this point unless it's a valid pointer. Signed-off-by: Jeff Layton <jlayton@redhat.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: Christoph Hellwig <hch@lst.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | fs: no games with DCACHE_UNHASHEDNick Piggin2009-12-172-31/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Filesystems outside the regular namespace do not have to clear DCACHE_UNHASHED in order to have a working /proc/$pid/fd/XXX. Nothing in proc prevents the fd link from being used if its dentry is not in the hash. Also, it does not get put into the dcache hash if DCACHE_UNHASHED is clear; that depends on the filesystem calling d_add or d_rehash. So delete the misleading comments and needless code. Acked-by: Miklos Szeredi <mszeredi@suse.cz> Signed-off-by: Nick Piggin <npiggin@suse.de> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | fs: anon_inodes implement dnameNick Piggin2009-12-171-0/+10
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add a d_dname method for anon_inodes filesystem, the same way pipefs and sockfs pseudo filesystems. This allows us to remove the DCACHE_UNHASHED hack from anon_inodes.c (see next patch). [AV: inumber is useless here, dropped from anon_inodefs_dname()] Signed-off-by: Nick Piggin <npiggin@suse.de> Cc: Miklos Szeredi <mszeredi@suse.cz> Cc: Davide Libenzi <davidel@xmailserver.org> Cc: "David S. Miller" <davem@davemloft.net> Cc: Jens Axboe <jens.axboe@oracle.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | dio: fix use-after-freeAl Viro2009-12-171-1/+1
| | | | | | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* | Merge branch 'for-linus' of git://oss.sgi.com/xfs/xfsLinus Torvalds2009-12-166-21/+24
|\ \ | | | | | | | | | | | | | | | | | | | | | * 'for-linus' of git://oss.sgi.com/xfs/xfs: XFS: Free buffer pages array unconditionally xfs: kill xfs_bmbt_rec_32/64 types xfs: improve metadata I/O merging in the elevator xfs: check for not fully initialized inodes in xfs_ireclaim
| * | XFS: Free buffer pages array unconditionallyDave Chinner2009-12-161-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The code in xfs_free_buf() only attempts to free the b_pages array if the buffer is a page cache backed or page allocated buffer. The extra log buffer that is used when the log wraps uses pages that are allocated to a different log buffer, but it still has a b_pages array allocated when those pages are associated to with the extra buffer in xfs_buf_associate_memory. Hence we need to always attempt to free the b_pages array when tearing down a buffer, not just on buffers that are explicitly marked as page bearing buffers. This fixes a leak detected by the kernel memory leak code. Signed-off-by: Dave Chinner <david@fromorbit.com> Signed-off-by: Alex Elder <aelder@sgi.com>
| * | xfs: kill xfs_bmbt_rec_32/64 typesChristoph Hellwig2009-12-162-14/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | For a long time we've always stored bmap btree records in the 64bit format, so kill off the dead 32bit type, and make sure the 64bit type is named just xfs_bmbt_rec everywhere, without any size postfix. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Eric Sandeen <sandeen@redhat.com> Signed-off-by: Alex Elder <aelder@sgi.com>
| * | xfs: improve metadata I/O merging in the elevatorDave Chinner2009-12-163-1/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Change all async metadata buffers to use [READ|WRITE]_META I/O types so that the I/O doesn't get issued immediately. This allows merging of adjacent metadata requests but still prioritises them over bulk data. This shows a 10-15% improvement in sequential create speed of small files. Don't include the log buffers in this classification - leave them as sync types so they are issued immediately. Signed-off-by: Dave Chinner <dgc@sgi.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Alex Elder <aelder@sgi.com>
| * | xfs: check for not fully initialized inodes in xfs_ireclaimChristoph Hellwig2009-12-161-4/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | Add an assert for inodes not added to the inode cache in xfs_ireclaim, to make sure we're not going to introduce something like the famous nfsd inode cache bug again. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Alex Elder <aelder@sgi.com>
* | | re-export alloc_file()Roland Dreier2009-12-161-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Commit 3d1e4631 ("get rid of init_file()") removed the export of alloc_file() -- possibly inadvertently, since that commit mainly consisted of deleting the lines between the end of alloc_file() and the start of the code in init_file(). There is in fact one modular use of alloc_file() in the tree, in drivers/infiniband/core/uverbs_main.c, so re-add the export to fix: ERROR: "alloc_file" [drivers/infiniband/core/ib_uverbs.ko] undefined! when CONFIG_INFINIBAND_USER_ACCESS=m. Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Roland Dreier <rolandd@cisco.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | Merge branch 'hwpoison' of ↵Linus Torvalds2009-12-161-42/+3
|\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/ak/linux-mce-2.6 * 'hwpoison' of git://git.kernel.org/pub/scm/linux/kernel/git/ak/linux-mce-2.6: (34 commits) HWPOISON: Remove stray phrase in a comment HWPOISON: Try to allocate migration page on the same node HWPOISON: Don't do early filtering if filter is disabled HWPOISON: Add a madvise() injector for soft page offlining HWPOISON: Add soft page offline support HWPOISON: Undefine short-hand macros after use to avoid namespace conflict HWPOISON: Use new shake_page in memory_failure HWPOISON: Use correct name for MADV_HWPOISON in documentation HWPOISON: mention HWPoison in Kconfig entry HWPOISON: Use get_user_page_fast in hwpoison madvise HWPOISON: add an interface to switch off/on all the page filters HWPOISON: add memory cgroup filter memcg: add accessor to mem_cgroup.css memcg: rename and export try_get_mem_cgroup_from_page() HWPOISON: add page flags filter mm: export stable page flags HWPOISON: limit hwpoison injector to known page types HWPOISON: add fs/device filters HWPOISON: return 0 to indicate success reliably HWPOISON: make semantics of IGNORED/DELAYED clear ...
| * | | mm: export stable page flagsWu Fengguang2009-12-161-42/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Rename get_uflags() to stable_page_flags() and make it a global function for use in the hwpoison page flags filter, which need to compare user page flags with the value provided by user space. Also move KPF_* to kernel-page-flags.h for use by user space tools. Acked-by: Matt Mackall <mpm@selenic.com> Signed-off-by: Andi Kleen <ak@linux.intel.com> CC: Nick Piggin <npiggin@suse.de> CC: Christoph Lameter <cl@linux-foundation.org> Signed-off-by: Wu Fengguang <fengguang.wu@intel.com> Signed-off-by: Andi Kleen <ak@linux.intel.com>
* | | | Merge branch 'master' of ↵Linus Torvalds2009-12-1655-1165/+889
|\ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6 * 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6: (38 commits) direct I/O fallback sync simplification ocfs: stop using do_sync_mapping_range cleanup blockdev_direct_IO locking make generic_acl slightly more generic sanitize xattr handler prototypes libfs: move EXPORT_SYMBOL for d_alloc_name vfs: force reval of target when following LAST_BIND symlinks (try #7) ima: limit imbalance msg Untangling ima mess, part 3: kill dead code in ima Untangling ima mess, part 2: deal with counters Untangling ima mess, part 1: alloc_file() O_TRUNC open shouldn't fail after file truncation ima: call ima_inode_free ima_inode_free IMA: clean up the IMA counts updating code ima: only insert at inode creation time ima: valid return code from ima_inode_alloc fs: move get_empty_filp() deffinition to internal.h Sanitize exec_permission_lite() Kill cached_lookup() and real_lookup() Kill path_lookup_open() ... Trivial conflicts in fs/direct-io.c
| * | | | ocfs: stop using do_sync_mapping_rangeChristoph Hellwig2009-12-161-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | do_sync_mapping_range(..., SYNC_FILE_RANGE_WRITE) is a very awkward way to perform a filemap_fdatawrite_range. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| * | | | cleanup blockdev_direct_IO lockingChristoph Hellwig2009-12-163-120/+63
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently the locking in blockdev_direct_IO is a mess, we have three different locking types and very confusing checks for some of them. The most complicated one is DIO_OWN_LOCKING for reads, which happens to not actually be used. This patch gets rid of the DIO_OWN_LOCKING - as mentioned above the read case is unused anyway, and the write side is almost identical to DIO_NO_LOCKING. The difference is that DIO_NO_LOCKING always sets the create argument for the get_blocks callback to zero, but we can easily move that to the actual get_blocks callbacks. There are four users of the DIO_NO_LOCKING mode: gfs already ignores the create argument and thus is fine with the new version, ocfs2 only errors out if create were ever set, and we can remove this dead code now, the block device code only ever uses create for an error message if we are fully beyond the device which can never happen, and last but not least XFS will need the new behavour for writes. Now we can replace the lock_type variable with a flags one, where no flag means the DIO_NO_LOCKING behaviour and DIO_LOCKING is kept as the first flag. Separate out the check for not allowing to fill holes into a separate flag, although for now both flags always get set at the same time. Also revamp the documentation of the locking scheme to actually make sense. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| * | | | make generic_acl slightly more genericChristoph Hellwig2009-12-161-69/+89
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Now that we cache the ACL pointers in the generic inode all the generic_acl cruft can go away and generic_acl.c can directly implement xattr handlers dealing with the full Posix ACL semantics for in-memory filesystems. Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| * | | | sanitize xattr handler prototypesChristoph Hellwig2009-12-1636-742/+496
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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>
| * | | | libfs: move EXPORT_SYMBOL for d_alloc_nameH Hartley Sweeten2009-12-162-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The EXPORT_SYMBOL for d_alloc_name is in fs/libfs.c but the function is in fs/dcache.c. Move the EXPORT_SYMBOL to the line immediately after the closing function brace line in fs/dcache.c as mentioned in Documentation/CodingStyle. Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
| * | | | vfs: force reval of target when following LAST_BIND symlinks (try #7)Jeff Layton2009-12-161-0/+45
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | procfs-style symlinks return a last_type of LAST_BIND without an actual path string. This causes __follow_link to skip calling __vfs_follow_link and so the dentry isn't revalidated. This is a problem when the link target sits on NFSv4 as it depends on the VFS to revalidate the dentry before using it on an open call. Ensure that this occurs by forcing a revalidation of the target dentry of LAST_BIND symlinks. Signed-off-by: Jeff Layton <jlayton@redhat.com> Acked-by: "Eric W. Biederman" <ebiederm@xmission.com> Acked-by: Miklos Szeredi <mszeredi@suse.cz> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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