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2009-05-15Merge branch 'for_linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4 * 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4: ext4: Fix race in ext4_inode_info.i_cached_extent ext4: Clear the unwritten buffer_head flag after the extent is initialized ext4: Use a fake block number for delayed new buffer_head ext4: Fix sub-block zeroing for writes into preallocated extents
2009-05-15devpts: correctly set default optionsSukadev Bhattiprolu
devpts_get_sb() calls memset(0) to clear mount options and calls parse_mount_options() if user specified any mount options. The memset(0) is bogus since the 'mode' and 'ptmxmode' options are non-zero by default. parse_mount_options() restores options to default anyway and can properly deal with NULL mount options. So in devpts_get_sb() remove memset(0) and call parse_mount_options() even for NULL mount options. Bug reported by Eric Paris: http://lkml.org/lkml/2009/5/7/448. Signed-off-by: Sukadev Bhattiprolu <sukadev@us.ibm.com> Tested-by: Marc Dionne <marc.c.dionne@gmail.com> Reported-by: Eric Paris <eparis@redhat.com> Cc: Christoph Hellwig <hch@lst.de> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Acked-by: Serge Hallyn <serue@us.ibm.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: "Rafael J. Wysocki" <rjw@sisk.pl> Reviewed-by: "H. Peter Anvin" <hpa@zytor.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-05-15ext4: Fix race in ext4_inode_info.i_cached_extentTheodore Ts'o
If two CPU's simultaneously call ext4_ext_get_blocks() at the same time, there is nothing protecting the i_cached_extent structure from being used and updated at the same time. This could potentially cause the wrong location on disk to be read or written to, including potentially causing the corruption of the block group descriptors and/or inode table. This bug has been in the ext4 code since almost the very beginning of ext4's development. Fortunately once the data is stored in the page cache cache, ext4_get_blocks() doesn't need to be called, so trying to replicate this problem to the point where we could identify its root cause was *extremely* difficult. Many thanks to Kevin Shanahan for working over several months to be able to reproduce this easily so we could finally nail down the cause of the corruption. Signed-off-by: "Theodore Ts'o" <tytso@mit.edu> Reviewed-by: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>
2009-05-15Merge git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6Linus Torvalds
* git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6: cifs: fix error handling in parse_DFS_referrals
2009-05-15Merge git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstableLinus Torvalds
* git://git.kernel.org/pub/scm/linux/kernel/git/mason/btrfs-unstable: Btrfs: Spelling fix in btrfs_lookup_first_block_group comments Btrfs: make show_options result match actual option names Btrfs: remove outdated comment in btrfs_ioctl_resize() Btrfs: remove some WARN_ONs in the IO failure path Btrfs: Don't loop forever on metadata IO failures Btrfs: init inode ordered_data_close flag properly
2009-05-14ext4: Clear the unwritten buffer_head flag after the extent is initializedAneesh Kumar K.V
The BH_Unwritten flag indicates that the buffer is allocated on disk but has not been written; that is, the disk was part of a persistent preallocation area. That flag should only be set when a get_blocks() function is looking up a inode's logical to physical block mapping. When ext4_get_blocks_wrap() is called with create=1, the uninitialized extent is converted into an initialized one, so the BH_Unwritten flag is no longer appropriate. Hence, we need to make sure the BH_Unwritten is not left set, since the combination of BH_Mapped and BH_Unwritten is not allowed; among other things, it will result ext4's get_block() to be called over and over again during the write_begin phase of write(2). Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2009-05-14Btrfs: Spelling fix in btrfs_lookup_first_block_group commentsSankar P
Signed-off-by: Sankar P <sankar.curiosity@gmail.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
2009-05-14Btrfs: make show_options result match actual option namesSage Weil
The notreelog and flushoncommit mount options were being printed slightly differently. Signed-off-by: Sage Weil <sage@newdream.net> Signed-off-by: Chris Mason <chris.mason@oracle.com>
2009-05-14Btrfs: remove outdated comment in btrfs_ioctl_resize()Li Hong
In Li Zefan's commit dae7b665cf6d6e6e733f1c9c16cf55547dd37e33, a combination call of kmalloc() and copy_from_user() is replaced by memdup_user(). So btrfs_ioctl_resize() doesn't use GFP_NOFS any more. Signed-off-by: Li Hong <lihong.hi@gmail.com> Signed-off-by: Chris Mason <chris.mason@oracle.com>
2009-05-14Btrfs: remove some WARN_ONs in the IO failure pathChris Mason
These debugging WARN_ONs make too much console noise during regular IO failures. An IO failure will still generate a number of messages as we verify checksums etc, but these two are not needed. Signed-off-by: Chris Mason <chris.mason@oracle.com>
2009-05-14Btrfs: Don't loop forever on metadata IO failuresChris Mason
When a btrfs metadata read fails, the first thing we try to do is find a good copy on another mirror of the block. If this fails, read_tree_block() ends up returning a buffer that isn't up to date. The btrfs btree reading code was reworked to drop locks and repeat the search when IO was done, but the changes didn't add a check for failed reads. The end result was looping forever on buffers that were never going to become up to date. Signed-off-by: Chris Mason <chris.mason@oracle.com>
2009-05-14Btrfs: init inode ordered_data_close flag properlyChris Mason
This flag is used to decide when we need to send a given file through the ordered code to make sure it is fully written before a transaction commits. It was not being properly set to zero when the inode was being setup. Signed-off-by: Chris Mason <chris.mason@oracle.com>
2009-05-14cifs: fix error handling in parse_DFS_referralsJeff Layton
cifs_strndup_from_ucs returns NULL on error, not an ERR_PTR Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Steve French <sfrench@us.ibm.com>
2009-05-13Merge git://git.kernel.org/pub/scm/linux/kernel/git/pkl/squashfs-linusLinus Torvalds
* git://git.kernel.org/pub/scm/linux/kernel/git/pkl/squashfs-linus: Squashfs: cody tidying, remove commented out line in Makefile Squashfs: check page size is not larger than the filesystem block size Squashfs: fix breakage when page size > metadata block size
2009-05-13Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse: fuse: destroy bdi on error
2009-05-13Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/ryusuke/nilfs2 * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ryusuke/nilfs2: nilfs2: check size of array structured data exchanged via ioctls nilfs2: fix lock order reversal in nilfs_clean_segments ioctl nilfs2: fix possible circular locking for get information ioctls nilfs2: ensure to clear dirty state when deleting metadata file block nilfs2: fix circular locking dependency of writer mutex nilfs2: fix possible recovery failure due to block creation without writer
2009-05-13Remove implementation of readpage from the hugetlbfs_aopsMel Gorman
The core VM assumes the page size used by the address_space in inode->i_mapping is PAGE_SIZE but hugetlbfs breaks this assumption by inserting pages into the page cache at offsets the core VM considers unexpected. This would not be a problem except that hugetlbfs also provide a ->readpage implementation. As it exists, the core VM can assume the base page size is being used, allocate pages on behalf of the filesystem, insert them into the page cache and call ->readpage to populate them. These pages are the wrong size and at the wrong offset for hugetlbfs causing confusion. This patch deletes the ->readpage implementation for hugetlbfs on the grounds the core VM should not be allocating and populating pages on behalf of hugetlbfs. There should be no existing users of the ->readpage implementation so it should not cause a regression. Signed-off-by: Mel Gorman <mel@csn.ul.ie> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-05-13Squashfs: cody tidying, remove commented out line in MakefilePhillip Lougher
Signed-off-by: Phillip Lougher <phillip@lougher.demon.co.uk>
2009-05-13Squashfs: check page size is not larger than the filesystem block sizePhillip Lougher
Normally the block size (by default 128K) will be larger than the page size, unless a non-standard block size has been specified in Mksquashfs, and the page size is larger than 4K. Signed-off-by: Phillip Lougher <phillip@lougher.demon.co.uk>
2009-05-13Squashfs: fix breakage when page size > metadata block sizeDoug Chapman
Squashfs is broken on any system where the page size is larger than the metadata size (8192). This is easily fixed by ensuring cache->pages is always > 0. [akpm@linux-foundation.org: coding-style fixes] Signed-off-by: Doug Chapman <doug.chapman@hp.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Phillip Lougher <phillip@lougher.demon.co.uk>
2009-05-13Merge branch 'for-2.6.30' of git://linux-nfs.org/~bfields/linuxLinus Torvalds
* 'for-2.6.30' of git://linux-nfs.org/~bfields/linux: nfsd: silence lockdep warning lockd: fix list corruption on lockd restart nfsd4: check for negative dentry before use in nfsv4 readdir nfsd41: slots are freed with session svcrdma: clean up error paths. svcrdma: Fix dma map direction for rdma read targets
2009-05-12epoll: fix size check in epoll_create()Davide Libenzi
Fix a size check WRT the manual pages. This was inadvertently broken by commit 9fe5ad9c8cef9ad5873d8ee55d1cf00d9b607df0 ("flag parameters add-on: remove epoll_create size param"). Signed-off-by: Davide Libenzi <davidel@xmailserver.org> Cc: <Hiroyuki.Mach@gmail.com> Cc: rohit verma <rohit.170309@gmail.com> Cc: Ulrich Drepper <drepper@redhat.com> Cc: <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-05-12ext4: Use a fake block number for delayed new buffer_headAneesh Kumar K.V
Use a very large unsigned number (~0xffff) as as the fake block number for the delayed new buffer. The VFS should never try to write out this number, but if it does, this will make it obvious. Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2009-05-13ext4: Fix sub-block zeroing for writes into preallocated extentsAneesh Kumar K.V
We need to mark the buffer_head mapping preallocated space as new during write_begin. Otherwise we don't zero out the page cache content properly for a partial write. This will cause file corruption with preallocation. Now that we mark the buffer_head new we also need to have a valid buffer_head blocknr so that unmap_underlying_metadata() unmaps the correct block. Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
2009-05-11nfsd: silence lockdep warningJ. Bruce Fields
Signed-off-by: J. Bruce Fields <bfields@citi.umich.edu>
2009-05-11dup2: Fix return value with oldfd == newfd and invalid fdJeff Mahoney
The return value of dup2 when oldfd == newfd and the fd isn't valid is not getting properly sign extended. We end up with 4294967287 instead of -EBADF. I've reproduced this on SLE11 (2.6.27.21), openSUSE Factory (2.6.29-rc5), and Ubuntu 9.04 (2.6.28). This patch uses a signed int for the error value so it is properly extended. Commit 6c5d0512a091480c9f981162227fdb1c9d70e555 introduced this regression. Reported-by: Jiri Dluhos <jdluhos@novell.com> Signed-off-by: Jeff Mahoney <jeffm@suse.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-05-11nilfs2: check size of array structured data exchanged via ioctlsRyusuke Konishi
Although some ioctls of nilfs2 exchange data in the form of indirectly referenced array, some of them lack size check on the array elements. This inserts the missing checks and rejects requests if data of ioctl does not have a valid format. We usually don't have to check size of structures that we associated with ioctl commands because the size is tested implicitly for identifying ioctl command; the checks this patch adds are for the cases where the implicit check is not applied. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
2009-05-11nilfs2: fix lock order reversal in nilfs_clean_segments ioctlRyusuke Konishi
This is a companion patch to ("nilfs2: fix possible circular locking for get information ioctls"). This corrects lock order reversal between mm->mmap_sem and nilfs->ns_segctor_sem in nilfs_clean_segments() which was detected by lockdep check: ======================================================= [ INFO: possible circular locking dependency detected ] 2.6.30-rc3-nilfs-00003-g360bdc1 #7 ------------------------------------------------------- mmap/5294 is trying to acquire lock: (&nilfs->ns_segctor_sem){++++.+}, at: [<d0d0e846>] nilfs_transaction_begin+0xb6/0x10c [nilfs2] but task is already holding lock: (&mm->mmap_sem){++++++}, at: [<c043700a>] do_page_fault+0x1d8/0x30a which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&mm->mmap_sem){++++++}: [<c01470a5>] __lock_acquire+0x1066/0x13b0 [<c01474a9>] lock_acquire+0xba/0xdd [<c01836bc>] might_fault+0x68/0x88 [<c023c61d>] copy_from_user+0x2a/0x111 [<d0d120d0>] nilfs_ioctl_prepare_clean_segments+0x1d/0xf1 [nilfs2] [<d0d0e2aa>] nilfs_clean_segments+0x6d/0x1b9 [nilfs2] [<d0d11f68>] nilfs_ioctl+0x2ad/0x318 [nilfs2] [<c01a3be7>] vfs_ioctl+0x22/0x69 [<c01a408e>] do_vfs_ioctl+0x460/0x499 [<c01a4107>] sys_ioctl+0x40/0x5a [<c01031a4>] sysenter_do_call+0x12/0x38 [<ffffffff>] 0xffffffff -> #0 (&nilfs->ns_segctor_sem){++++.+}: [<c0146e0b>] __lock_acquire+0xdcc/0x13b0 [<c01474a9>] lock_acquire+0xba/0xdd [<c0433f1d>] down_read+0x2a/0x3e [<d0d0e846>] nilfs_transaction_begin+0xb6/0x10c [nilfs2] [<d0cfe0e5>] nilfs_page_mkwrite+0xe7/0x154 [nilfs2] [<c0183b0b>] __do_fault+0x165/0x376 [<c01855cd>] handle_mm_fault+0x287/0x5d1 [<c043712d>] do_page_fault+0x2fb/0x30a [<c0435462>] error_code+0x72/0x78 [<ffffffff>] 0xffffffff where nilfs_clean_segments() holds: nilfs->ns_segctor_sem -> copy_from_user() --> page fault -> mm->mmap_sem And, page fault path may hold: page fault -> mm->mmap_sem --> nilfs_page_mkwrite() -> nilfs->ns_segctor_sem Even though nilfs_clean_segments() does not perform write access on given user pages, it may cause deadlock because nilfs->ns_segctor_sem is shared per device and mm->mmap_sem can be shared with other tasks. To avoid this problem, this patch moves all calls of copy_from_user() outside the nilfs->ns_segctor_sem lock in the ioctl. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
2009-05-11nilfs2: fix possible circular locking for get information ioctlsRyusuke Konishi
This is one of two patches which are to correct possible circular locking between mm->mmap_sem and nilfs->ns_segctor_sem. The problem was detected by lockdep check as follows: ======================================================= [ INFO: possible circular locking dependency detected ] 2.6.30-rc3-nilfs-00002-g3552613 #6 ------------------------------------------------------- mmap/5418 is trying to acquire lock: (&nilfs->ns_segctor_sem){++++.+}, at: [<d0d0e852>] nilfs_transaction_begin+0xb6/0x10c [nilfs2] but task is already holding lock: (&mm->mmap_sem){++++++}, at: [<c043700a>] do_page_fault+0x1d8/0x30a which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&mm->mmap_sem){++++++}: [<c01470a5>] __lock_acquire+0x1066/0x13b0 [<c01474a9>] lock_acquire+0xba/0xdd [<c01836bc>] might_fault+0x68/0x88 [<c023c730>] copy_to_user+0x2c/0xfc [<d0d11b4f>] nilfs_ioctl_wrap_copy+0x103/0x160 [nilfs2] [<d0d11fa9>] nilfs_ioctl+0x30a/0x3b0 [nilfs2] [<c01a3be7>] vfs_ioctl+0x22/0x69 [<c01a408e>] do_vfs_ioctl+0x460/0x499 [<c01a4107>] sys_ioctl+0x40/0x5a [<c01031a4>] sysenter_do_call+0x12/0x38 [<ffffffff>] 0xffffffff -> #0 (&nilfs->ns_segctor_sem){++++.+}: [<c0146e0b>] __lock_acquire+0xdcc/0x13b0 [<c01474a9>] lock_acquire+0xba/0xdd [<c0433f1d>] down_read+0x2a/0x3e [<d0d0e852>] nilfs_transaction_begin+0xb6/0x10c [nilfs2] [<d0cfe0e5>] nilfs_page_mkwrite+0xe7/0x154 [nilfs2] [<c0183b0b>] __do_fault+0x165/0x376 [<c01855cd>] handle_mm_fault+0x287/0x5d1 [<c043712d>] do_page_fault+0x2fb/0x30a [<c0435462>] error_code+0x72/0x78 [<ffffffff>] 0xffffffff other info that might help us debug this: 1 lock held by mmap/5418: #0: (&mm->mmap_sem){++++++}, at: [<c043700a>] do_page_fault+0x1d8/0x30a stack backtrace: Pid: 5418, comm: mmap Not tainted 2.6.30-rc3-nilfs-00002-g3552613 #6 Call Trace: [<c0432145>] ? printk+0xf/0x12 [<c0145c48>] print_circular_bug_tail+0xaa/0xb5 [<c0146e0b>] __lock_acquire+0xdcc/0x13b0 [<d0d10149>] ? nilfs_sufile_get_stat+0x1e/0x105 [nilfs2] [<c013b59a>] ? up_read+0x16/0x2c [<d0d10225>] ? nilfs_sufile_get_stat+0xfa/0x105 [nilfs2] [<c01474a9>] lock_acquire+0xba/0xdd [<d0d0e852>] ? nilfs_transaction_begin+0xb6/0x10c [nilfs2] [<c0433f1d>] down_read+0x2a/0x3e [<d0d0e852>] ? nilfs_transaction_begin+0xb6/0x10c [nilfs2] [<d0d0e852>] nilfs_transaction_begin+0xb6/0x10c [nilfs2] [<d0cfe0e5>] nilfs_page_mkwrite+0xe7/0x154 [nilfs2] [<c0183b0b>] __do_fault+0x165/0x376 [<c01855cd>] handle_mm_fault+0x287/0x5d1 [<c043700a>] ? do_page_fault+0x1d8/0x30a [<c013b54f>] ? down_read_trylock+0x39/0x43 [<c043712d>] do_page_fault+0x2fb/0x30a [<c0436e32>] ? do_page_fault+0x0/0x30a [<c0435462>] error_code+0x72/0x78 [<c0436e32>] ? do_page_fault+0x0/0x30a This makes the lock granularity of nilfs->ns_segctor_sem finer than that of the mmap semaphore for ioctl commands except nilfs_clean_segments(). The successive patch ("nilfs2: fix lock order reversal in nilfs_clean_segments ioctl") is required to fully resolve the problem. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
2009-05-10Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6 * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6: (22 commits) Fix the race between capifs remount and node creation Fix races around the access to ->s_options switch ufs directories to ufs_sync_file() Switch open_exec() and sys_uselib() to do_open_filp() Make open_exec() and sys_uselib() use may_open(), instead of duplicating its parts Reduce path_lookup() abuses Make checkpatch.pl shut up on fs/inode.c NULL noise in fs/super.c:kill_bdev_super() romfs: cleanup romfs_fs.h ROMFS: romfs_dev_read() error ignored fs: dcache fix LRU ordering ocfs2: Use nd_set_link(). Fix deadlock in ipathfs ->get_sb() Fix a leak in failure exit in 9p ->get_sb() Convert obvious places to deactivate_locked_super() New helper: deactivate_locked_super() reiserfs: remove privroot hiding in lookup reiserfs: dont associate security.* with xattr files reiserfs: fixup xattr_root caching Always lookup priv_root on reiserfs mount and keep it ...
2009-05-10nilfs2: ensure to clear dirty state when deleting metadata file blockRyusuke Konishi
This would fix the following failure during GC: nilfs_cpfile_delete_checkpoints: cannot delete block NILFS: GC failed during preparation: cannot delete checkpoints: err=-2 The problem was caused by a break in state consistency between page cache and btree; the above block was removed from the btree but the page buffering the block was remaining in the page cache in dirty state. This resolves the inconsistency by ensuring to clear dirty state of the page buffering the deleted block. Reported-by: David Arendt <admin@prnet.org> Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
2009-05-09Fix races around the access to ->s_optionsAl Viro
Put generic_show_options read access to s_options under rcu_read_lock, split save_mount_options() into "we are setting it the first time" (uses in foo_fill_super()) and "we are relacing and freeing the old one", synchronize_rcu() before kfree() in the latter. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2009-05-09switch ufs directories to ufs_sync_file()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2009-05-09Switch open_exec() and sys_uselib() to do_open_filp()Al Viro
... and make path_lookup_open() static Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2009-05-09Make open_exec() and sys_uselib() use may_open(), instead of duplicating its ↵Al Viro
parts Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2009-05-09Reduce path_lookup() abusesAl Viro
... use kern_path() where possible [folded a fix from rdd] Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2009-05-09Make checkpatch.pl shut up on fs/inode.cManish Katiyar
Code Quality According To Mingo(tm) has been vastly improved, no code has been damaged^Wchanged^Wdamaged. [commit message rewritten -- AV] Signed-off-by: Manish Katiyar <mkatiyar@gmail.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2009-05-09NULL noise in fs/super.c:kill_bdev_super()H Hartley Sweeten
Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Cc: Subrata Modak <subrata@linux.vnet.ibm.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2009-05-09ROMFS: romfs_dev_read() error ignoredRoel Kluin
romfs_dev_read() may return -EIO, but ret is unsigned, so the errorpath isn't taken. Signed-off-by: Roel Kluin <roel.kluin@gmail.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2009-05-09fs: dcache fix LRU orderingnpiggin@suse.de
Fix ordering of LRU when moving referenced dentries to the head of the list (they should go to the head of the list in the same order as they were found from the tail, rather than reverse order). Signed-off-by: Nick Piggin <npiggin@suse.de> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2009-05-09ocfs2: Use nd_set_link().Joel Becker
ocfs2 was hand-calling vfs_follow_link(), but there's no point to that. Let's use page_follow_link_light() and nd_set_link(). Signed-off-by: Joel Becker <joel.becker@oracle.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2009-05-09Fix a leak in failure exit in 9p ->get_sb()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2009-05-09Convert obvious places to deactivate_locked_super()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2009-05-09New helper: deactivate_locked_super()Al Viro
Does equivalent of up_write(&s->s_umount); deactivate_super(s); However, it does not does not unlock it until it's all over. As the result, it's safe to use to dispose of new superblock on ->get_sb() failure exits - nobody will see the sucker until it's all over. Equivalent using up_write/deactivate_super is safe for that purpose if superblock is either safe to use or has NULL ->s_root when we unlock. Normally filesystems take the required precautions, but a) we do have bugs in that area in some of them. b) up_write/deactivate_super sequence is extremely common, so the helper makes sense anyway. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2009-05-09reiserfs: remove privroot hiding in lookupJeff Mahoney
With Al Viro's patch to move privroot lookup to fs mount, there's no need to have special code to hide the privroot in reiserfs_lookup. I've also cleaned up the privroot hiding in reiserfs_readdir_dentry and removed the last user of reiserfs_xattrs(). Signed-off-by: Jeff Mahoney <jeffm@suse.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2009-05-09reiserfs: dont associate security.* with xattr filesJeff Mahoney
The security.* xattrs are ignored for xattr files, so don't create them. Signed-off-by: Jeff Mahoney <jeffm@suse.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2009-05-09reiserfs: fixup xattr_root cachingJeff Mahoney
The xattr_root caching was broken from my previous patch set. It wouldn't cause corruption, but could cause decreased performance due to allocating a larger chunk of the journal (~ 27 blocks) than it would actually use. This patch loads the xattr root dentry at xattr initialization and creates it on-demand. Since we're using the cached dentry, there's no point in keeping lookup_or_create_dir around, so that's removed. Signed-off-by: Jeff Mahoney <jeffm@suse.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2009-05-09Always lookup priv_root on reiserfs mount and keep itAl Viro
... even if it's a negative dentry. That way we can set ->d_op on root before anyone could race with us. Simplify d_compare(), while we are at it. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2009-05-09reiserfs: Expand i_mutex to enclose lookup_one_lenJeff Mahoney
2.6.30-rc3 introduced some sanity checks in the VFS code to avoid NFS bugs by ensuring that lookup_one_len is always called under i_mutex. This patch expands the i_mutex locking to enclose lookup_one_len. This was always required, but not not enforced in the reiserfs code since it does locking around the xattr interactions with the xattr_sem. This is obvious enough, and it survived an overnight 50 thread ACL test. Signed-off-by: Jeff Mahoney <jeffm@suse.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2009-05-09vfs: umount_begin BKL pushdownAlessio Igor Bogani
Push BKL down into ->umount_begin() Signed-off-by: Alessio Igor Bogani <abogani@texware.it> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>