| Age | Commit message (Collapse) | Author | Files | Lines |
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This allows removing extents from the extent tree especially on truncate
operations, and thus fixing reads from truncated and re-extended that
previously returned stale data.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
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Currently the block layout driver tracks extents in three separate
data structures:
- the two list of pnfs_block_extent structures returned by the server
- the list of sectors that were in invalid state but have been written to
- a list of pnfs_block_short_extent structures for LAYOUTCOMMIT
All of these share the property that they are not only highly inefficient
data structures, but also that operations on them are even more inefficient
than nessecary.
In addition there are various implementation defects like:
- using an int to track sectors, causing corruption for large offsets
- incorrect normalization of page or block granularity ranges
- insufficient error handling
- incorrect synchronization as extents can be modified while they are in
use
This patch replace all three data with a single unified rbtree structure
tracking all extents, as well as their in-memory state, although we still
need to instance for read-only and read-write extent due to the arcane
client side COW feature in the block layouts spec.
To fix the problem of extent possibly being modified while in use we make
sure to return a copy of the extent for use in the write path - the
extent can only be invalidated by a layout recall or return which has
to wait until the I/O operations finished due to refcounts on the layout
segment.
The new extent tree work similar to the schemes used by block based
filesystems like XFS or ext4.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
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The core nfs code handles setting pages uptodate on reads, no need to mess
with the pageflags outselves. Also remove a debug function to dump page
flags.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
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Use the new PNFS_READ_WHOLE_PAGE flag to offload read-modify-write
handling to core nfs code, and remove a huge chunk of deadlock prone
mess from the block layout writeback path.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
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If a layout driver keeps per-inode state outside of the layout segments it
needs to be notified of any layout returns or recalls on an inode, and not
just about the freeing of layout segments. Add a method to acomplish this,
which will allow the block layout driver to handle the case of truncated
and re-expanded files properly.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
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Like all block based filesystems, the pNFS block layout driver can't read
or write at a byte granularity and thus has to perform read-modify-write
cycles on writes smaller than this granularity.
Add a flag so that the core NFS code always reads a whole page when
starting a smaller write, so that we can do it in the place where the VFS
expects it instead of doing in very deadlock prone way in the writeback
handler.
Note that in theory we could do less than page size reads here for disks
that have a smaller sector size which are served by a server with a smaller
pnfs block size. But so far that doesn't seem like a worthwhile
optimization.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
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Expedite layout recall processing by forcing a layout commit when
we see busy segments. Without it the layout recall might have to wait
until the VM decided to start writeback for the file, which can introduce
long delays.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
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gcc reports:
linux/fs/nfs/write.c: In function ‘nfs_page_find_head_request_locked.isra.17’:
linux/fs/nfs/write.c:121:64: warning: ‘cinfo.mds’ may be used uninitialized in this function [-Wmaybe-uninitialized]
list_for_each_entry_safe(freq, t, &cinfo.mds->list, wb_list) {
^
linux/fs/nfs/write.c:110:25: note: ‘cinfo.mds’ was declared here
struct nfs_commit_info cinfo;
Reported-by: Anna Schumaker <Anna.Schumaker@netapp.com>
Cc: Weston Andros Adamson <dros@primarydata.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
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When we do non-page sized reads we can underflow the extent_length variable
and read incorrect data. Fix the extent_length calculation and change to
defensive <= checks for the extent length in the read and write path.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
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Make sure the block queue is plugged when performing pNFS blocklayout I/O.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
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Tell userspace what stage of GETDEVICEINFO failed so that there is a chance
to debug it, especially with the userspace daemon clusterf***k in the block
layout driver.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
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The Linux VM subsystem can't support block sizes larger than page size
for block based filesystems very well. While this can be hacked around
to some extent for simple filesystems the read-modify-write cycles
required for pnfs block invalid extents are extremly deadlock prone
when operating on multiple pages. Reject this case early on instead
of pretending to support it (badly).
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
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Currently there is no XDR buffer space allocated for the per-layout driver
layoutcommit payload, which leads to server buffer overflows in the
blocklayout driver even under simple workloads. As we can't do per-layout
sizes for XDR operations we'll have to splice a previously encoded list
of pages into the XDR stream, similar to how we handle ACL buffers.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
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After we issued a layoutreturn operations the may free the layout stateid
and will thus cause bad stateid error when the client uses it again.
We currently try to avoid this case by chosing the open stateid if not
lsegs are present for this inode. But various places can hold refererence
on lsegs and thus cause the list not to be empty shortly after a layout
return. Add an explicit flag to mark the current layout stateid invalid
and force usage of the openstateid after we did a full file layoutreturn.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
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Currently we fall through to nfs4_async_handle_error when we get
a bad stateid error back from layoutget. nfs4_async_handle_error
with a NULL state argument will never retry the operations but return
the error to higher layer, causing an avoiable fallback to MDS I/O.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
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When layoutget returns an entirely new layout stateid it should not
check the generation counter as the new stateid will start with a new
counter entirely unrelated to old one.
The current behavior causes constant layoutget failures against a block
server which allocates a new stateid after an recall that removed all
outstanding layouts.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
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Ensure the lsegs are initialized early so that we don't pass an unitialized
one back to ->free_lseg during error processing.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
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pNFS servers may return arbitrarily large layouts. Trim back the I/O size
to one that we can at least allocate the page array for.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
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Following http://www.rfc-editor.org/errata_search.php?rfc=5661&eid=2751
Don't set layoutcommit for commit_through_mds case.
For FILE_SYNC writes, don't set layoutcommit.
For DATA_SYNC wirtes, set layout commit right after wirtes done.
For UNSTABLE writes, set layout commit when commit done.
Signed-off-by: Peng Tao <tao.peng@primarydata.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
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Track lwb in nfs_commit_data so that we can use it to setup
layoutcommit in commit_done callback.
Signed-off-by: Peng Tao <tao.peng@primarydata.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
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can_open_cached() reads values out of the state structure, meaning that
we need the so_lock to have a correct return value. As a bonus, this
helps clear up some potentially confusing code.
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
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filelayout_retry_commit was recently split out from alloc_ds_commits,
but was done in such a way that the bucket pointer always starts at
index 0 no matter what the @idx argument is set to.
The intention of the @idx argument is to retry commits starting at
bucket @idx. This is called when alloc_ds_commits fails for a bucket.
Signed-off-by: Weston Andros Adamson <dros@primarydata.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
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This reverts commit 49a4bda22e186c4d0eb07f4a36b5b1a378f9398d.
Christoph reported an oops due to the above commit:
generic/089 242s ...[ 2187.041239] general protection fault: 0000 [#1]
SMP
[ 2187.042899] Modules linked in:
[ 2187.044000] CPU: 0 PID: 11913 Comm: kworker/0:1 Not tainted 3.16.0-rc6+ #1151
[ 2187.044287] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2007
[ 2187.044287] Workqueue: nfsiod free_lock_state_work
[ 2187.044287] task: ffff880072b50cd0 ti: ffff88007a4ec000 task.ti: ffff88007a4ec000
[ 2187.044287] RIP: 0010:[<ffffffff81361ca6>] [<ffffffff81361ca6>] free_lock_state_work+0x16/0x30
[ 2187.044287] RSP: 0018:ffff88007a4efd58 EFLAGS: 00010296
[ 2187.044287] RAX: 6b6b6b6b6b6b6b6b RBX: ffff88007a947ac0 RCX: 8000000000000000
[ 2187.044287] RDX: ffffffff826af9e0 RSI: ffff88007b093c00 RDI: ffff88007b093db8
[ 2187.044287] RBP: ffff88007a4efd58 R08: ffffffff832d3e10 R09: 000001c40efc0000
[ 2187.044287] R10: 0000000000000000 R11: 0000000000059e30 R12: ffff88007fc13240
[ 2187.044287] R13: ffff88007fc18b00 R14: ffff88007b093db8 R15: 0000000000000000
[ 2187.044287] FS: 0000000000000000(0000) GS:ffff88007fc00000(0000) knlGS:0000000000000000
[ 2187.044287] CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b
[ 2187.044287] CR2: 00007f93ec33fb80 CR3: 0000000079dc2000 CR4: 00000000000006f0
[ 2187.044287] Stack:
[ 2187.044287] ffff88007a4efdd8 ffffffff810cc877 ffffffff810cc80d ffff88007fc13258
[ 2187.044287] 000000007a947af0 0000000000000000 ffffffff8353ccc8 ffffffff82b6f3d0
[ 2187.044287] 0000000000000000 ffffffff82267679 ffff88007a4efdd8 ffff88007fc13240
[ 2187.044287] Call Trace:
[ 2187.044287] [<ffffffff810cc877>] process_one_work+0x1c7/0x490
[ 2187.044287] [<ffffffff810cc80d>] ? process_one_work+0x15d/0x490
[ 2187.044287] [<ffffffff810cd569>] worker_thread+0x119/0x4f0
[ 2187.044287] [<ffffffff810fbbad>] ? trace_hardirqs_on+0xd/0x10
[ 2187.044287] [<ffffffff810cd450>] ? init_pwq+0x190/0x190
[ 2187.044287] [<ffffffff810d3c6f>] kthread+0xdf/0x100
[ 2187.044287] [<ffffffff810d3b90>] ? __init_kthread_worker+0x70/0x70
[ 2187.044287] [<ffffffff81d9873c>] ret_from_fork+0x7c/0xb0
[ 2187.044287] [<ffffffff810d3b90>] ? __init_kthread_worker+0x70/0x70
[ 2187.044287] Code: 0f 1f 44 00 00 31 c0 5d c3 66 66 66 2e 0f 1f 84 00 00 00 00 00 55 48 8d b7 48 fe ff ff 48 8b 87 58 fe ff ff 48 89 e5 48 8b 40 30 <48> 8b 00 48 8b 10 48 89 c7 48 8b 92 90 03 00 00 ff 52 28 5d c3
[ 2187.044287] RIP [<ffffffff81361ca6>] free_lock_state_work+0x16/0x30
[ 2187.044287] RSP <ffff88007a4efd58>
[ 2187.103626] ---[ end trace 0f11326d28e5d8fa ]---
The original reason for this patch was because the fl_release_private
operation couldn't sleep. With commit ed9814d85810 (locks: defer freeing
locks in locks_delete_lock until after i_lock has been dropped), this is
no longer a problem so we can revert this patch.
Reported-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Jeff Layton <jlayton@primarydata.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Tested-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
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I saw the following kernel warning:
[ 1852.321222] ------------[ cut here ]------------
[ 1852.326527] WARNING: CPU: 0 PID: 118 at fs/proc/generic.c:521 remove_proc_entry+0x154/0x16b()
[ 1852.335630] remove_proc_entry: removing non-empty directory 'fs/nfsfs', leaking at least 'volumes'
[ 1852.344084] CPU: 0 PID: 118 Comm: kworker/u8:2 Not tainted 3.16.0+ #540
[ 1852.350036] Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
[ 1852.354992] Workqueue: netns cleanup_net
[ 1852.358701] 0000000000000000 ffff880116f2fbd0 ffffffff819c03e9 ffff880116f2fc18
[ 1852.366474] ffff880116f2fc08 ffffffff810744ee ffffffff811e0e6e ffff8800d4e96238
[ 1852.373507] ffffffff81dbe665 ffff8800d46a5948 0000000000000005 ffff880116f2fc68
[ 1852.380224] Call Trace:
[ 1852.381976] [<ffffffff819c03e9>] dump_stack+0x4d/0x66
[ 1852.385495] [<ffffffff810744ee>] warn_slowpath_common+0x7a/0x93
[ 1852.389869] [<ffffffff811e0e6e>] ? remove_proc_entry+0x154/0x16b
[ 1852.393987] [<ffffffff8107457b>] warn_slowpath_fmt+0x4c/0x4e
[ 1852.397999] [<ffffffff811e0e6e>] remove_proc_entry+0x154/0x16b
[ 1852.402034] [<ffffffff8129c73d>] nfs_fs_proc_net_exit+0x53/0x56
[ 1852.406136] [<ffffffff812a103b>] nfs_net_exit+0x12/0x1d
[ 1852.409774] [<ffffffff81785bc9>] ops_exit_list+0x44/0x55
[ 1852.413529] [<ffffffff81786389>] cleanup_net+0xee/0x182
[ 1852.417198] [<ffffffff81088c9e>] process_one_work+0x209/0x40d
[ 1852.502320] [<ffffffff81088bf7>] ? process_one_work+0x162/0x40d
[ 1852.587629] [<ffffffff810890c1>] worker_thread+0x1f0/0x2c7
[ 1852.673291] [<ffffffff81088ed1>] ? process_scheduled_works+0x2f/0x2f
[ 1852.759470] [<ffffffff8108e079>] kthread+0xc9/0xd1
[ 1852.843099] [<ffffffff8109427f>] ? finish_task_switch+0x3a/0xce
[ 1852.926518] [<ffffffff8108dfb0>] ? __kthread_parkme+0x61/0x61
[ 1853.008565] [<ffffffff819cbeac>] ret_from_fork+0x7c/0xb0
[ 1853.076477] [<ffffffff8108dfb0>] ? __kthread_parkme+0x61/0x61
[ 1853.140653] ---[ end trace 69c4c6617f78e32d ]---
It looks wrong that we add "/proc/net/nfsfs" in nfs_fs_proc_net_init()
while remove "/proc/fs/nfsfs" in nfs_fs_proc_net_exit().
Fixes: commit 65b38851a17 (NFS: Fix /proc/fs/nfsfs/servers and /proc/fs/nfsfs/volumes)
Cc: Eric W. Biederman <ebiederm@xmission.com>
Cc: Trond Myklebust <trond.myklebust@primarydata.com>
Cc: Dan Aloni <dan@kernelim.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
[Trond: replace uses of remove_proc_entry() with remove_proc_subtree()
as suggested by Al Viro]
Cc: stable@vger.kernel.org # 3.4.x : 65b38851a17: NFS: Fix /proc/fs/nfsfs/servers
Cc: stable@vger.kernel.org # 3.4.x
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
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git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull filesystem fixes from Al Viro:
"Several bugfixes (all of them -stable fodder).
Alexey's one deals with double mutex_lock() in UFS (apparently, nobody
has tried to test "ufs: sb mutex merge + mutex_destroy" on something
like file creation/removal on ufs). Mine deal with two kinds of
umount bugs, in umount propagation and in handling of automounted
submounts, both resulting in bogus transient EBUSY from umount"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
ufs: fix deadlocks introduced by sb mutex merge
fix EBUSY on umount() from MNT_SHRINKABLE
get rid of propagate_umount() mistakenly treating slaves as busy.
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Commit 0244756edc4b ("ufs: sb mutex merge + mutex_destroy") introduces
deadlocks in ufs_new_inode() and ufs_free_inode().
Most callers of that functions acqure the mutex by themselves and
ufs_{new,free}_inode() do that via lock_ufs(),
i.e we have an unavoidable double lock.
The patch proposes to resolve the issue by making sure that
ufs_{new,free}_inode() are not called with the mutex held.
Found by Linux Driver Verification project (linuxtesting.org).
Cc: stable@vger.kernel.org # 3.16
Signed-off-by: Alexey Khoroshilov <khoroshilov@ispras.ru>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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git://git.kernel.org/pub/scm/linux/kernel/git/dgc/linux-xfs
Pull xfs fixes from Dave Chinner:
"The fixes all address recently discovered data corruption issues.
The original Direct IO issue was discovered by Chris Mason @ Facebook
on a production workload which mixed buffered reads with direct reads
and writes IO to the same file. The fix for that exposed other issues
with page invalidation (exposed by millions of fsx operations) failing
due to dirty buffers beyond EOF.
Finally, the collapse_range code could also cause problems due to
racing writeback changing the extent map while it was being shifted
around. The commits for that problem are simple mitigation fixes that
prevent the problem from occuring. A more robust fix for 3.18 that
addresses the underlying problem is currently being worked on by
Brian.
Summary of fixes:
- a direct IO read/buffered read data corruption
- the associated fallout from the DIO data corruption fix
- collapse range bugs that are potential data corruption issues"
* tag 'xfs-for-linus-3.17-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/dgc/linux-xfs:
xfs: trim eofblocks before collapse range
xfs: xfs_file_collapse_range is delalloc challenged
xfs: don't log inode unless extent shift makes extent modifications
xfs: use ranged writeback and invalidation for direct IO
xfs: don't zero partial page cache pages during O_DIRECT writes
xfs: don't zero partial page cache pages during O_DIRECT writes
xfs: don't dirty buffers beyond EOF
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This patch changes sync_filesystem() to be EXPORT_SYMBOL().
The reason this is needed is that starting with 3.15 kernel, due to
Theodore Ts'o's commit 02b9984d6408 ("fs: push sync_filesystem() down to
the file system's remount_fs()"), all file systems that have dirty data
to be written out need to call sync_filesystem() from their
->remount_fs() method when remounting read-only.
As this is now a generically required function rather than an internal
only function it should be EXPORT_SYMBOL() so that all file systems can
call it.
Signed-off-by: Anton Altaparmakov <aia21@cantab.net>
Acked-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Pull aio bugfixes from Ben LaHaise:
"Two small fixes"
* git://git.kvack.org/~bcrl/aio-fixes:
aio: block exit_aio() until all context requests are completed
aio: add missing smp_rmb() in read_events_ring
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It seems that exit_aio() also needs to wait for all iocbs to complete (like
io_destroy), but we missed the wait step in current implemention, so fix
it in the same way as we did in io_destroy.
Signed-off-by: Gu Zheng <guz.fnst@cn.fujitsu.com>
Signed-off-by: Benjamin LaHaise <bcrl@kvack.org>
Cc: stable@vger.kernel.org
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git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs
Pull f2fs bug fixes from Jaegeuk Kim:
"This series includes patches to:
- fix recovery routines
- fix bugs related to inline_data/xattr
- fix when casting the dentry names
- handle EIO or ENOMEM correctly
- fix memory leak
- fix lock coverage"
* tag 'for-f2fs-3.17-rc4' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs: (28 commits)
f2fs: reposition unlock_new_inode to prevent accessing invalid inode
f2fs: fix wrong casting for dentry name
f2fs: simplify by using a literal
f2fs: truncate stale block for inline_data
f2fs: use macro for code readability
f2fs: introduce need_do_checkpoint for readability
f2fs: fix incorrect calculation with total/free inode num
f2fs: remove rename and use rename2
f2fs: skip if inline_data was converted already
f2fs: remove rewrite_node_page
f2fs: avoid double lock in truncate_blocks
f2fs: prevent checkpoint during roll-forward
f2fs: add WARN_ON in f2fs_bug_on
f2fs: handle EIO not to break fs consistency
f2fs: check s_dirty under cp_mutex
f2fs: unlock_page when node page is redirtied out
f2fs: introduce f2fs_cp_error for readability
f2fs: give a chance to mount again when encountering errors
f2fs: trigger release_dirty_inode in f2fs_put_super
f2fs: don't skip checkpoint if there is no dirty node pages
...
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We ran into a case on ppc64 running mariadb where io_getevents would
return zeroed out I/O events. After adding instrumentation, it became
clear that there was some missing synchronization between reading the
tail pointer and the events themselves. This small patch fixes the
problem in testing.
Thanks to Zach for helping to look into this, and suggesting the fix.
Signed-off-by: Jeff Moyer <jmoyer@redhat.com>
Signed-off-by: Benjamin LaHaise <bcrl@kvack.org>
Cc: stable@vger.kernel.org
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As the race condition on the inode cache, following scenario can appear:
[Thread a] [Thread b]
->f2fs_mkdir
->f2fs_add_link
->__f2fs_add_link
->init_inode_metadata failed here
->gc_thread_func
->f2fs_gc
->do_garbage_collect
->gc_data_segment
->f2fs_iget
->iget_locked
->wait_on_inode
->unlock_new_inode
->move_data_page
->make_bad_inode
->iput
When we fail in create/symlink/mkdir/mknod/tmpfile, the new allocated inode
should be set as bad to avoid being accessed by other thread. But in above
scenario, it allows f2fs to access the invalid inode before this inode was set
as bad.
This patch fix the potential problem, and this issue was found by code review.
change log from v1:
o Add condition judgment in gc_data_segment() suggested by Changman Lee.
o use iget_failed to simplify code.
Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
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xfs_collapse_file_space() currently writes back the entire file
undergoing collapse range to settle things down for the extent shift
algorithm. While this prevents changes to the extent list during the
collapse operation, the writeback itself is not enough to prevent
unnecessary collapse failures.
The current shift algorithm uses the extent index to iterate the in-core
extent list. If a post-eof delalloc extent persists after the writeback
(e.g., a prior zero range op where the end of the range aligns with eof
can separate the post-eof blocks such that they are not written back and
converted), xfs_bmap_shift_extents() becomes confused over the encoded
br_startblock value and fails the collapse.
As with the full writeback, this is a temporary fix until the algorithm
is improved to cope with a volatile extent list and avoid attempts to
shift post-eof extents.
Signed-off-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Dave Chinner <david@fromorbit.com>
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If we have delalloc extents on a file before we run a collapse range
opertaion, we sync the range that we are going to collapse to
convert delalloc extents in that region to real extents to simplify
the shift operation.
However, the shift operation then assumes that the extent list is
not going to change as it iterates over the extent list moving
things about. Unfortunately, this isn't true because we can't hold
the ILOCK over all the operations. We can prevent new IO from
modifying the extent list by holding the IOLOCK, but that doesn't
prevent writeback from running....
And when writeback runs, it can convert delalloc extents is the
range of the file prior to the region being collapsed, and this
changes the indexes of all the extents in the file. That causes the
collapse range operation to Go Bad.
The right fix is to rewrite the extent shift operation not to be
dependent on the extent list not changing across the entire
operation, but this is a fairly significant piece of work to do.
Hence, as a short-term workaround for the problem, sync the entire
file before starting a collapse operation to remove all delalloc
ranges from the file and so avoid the problem of concurrent
writeback changing the extent list.
Diagnosed-and-Reported-by: Brian Foster <bfoster@redhat.com>
Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Dave Chinner <david@fromorbit.com>
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The file collapse mechanism uses xfs_bmap_shift_extents() to collapse
all subsequent extents down into the specified, previously punched out,
region. This function performs some validation, such as whether a
sufficient hole exists in the target region of the collapse, then shifts
the remaining exents downward.
The exit path of the function currently logs the inode unconditionally.
While we must log the inode (and abort) if an error occurs and the
transaction is dirty, the initial validation paths can generate errors
before the transaction has been dirtied. This creates an unnecessary
filesystem shutdown scenario, as the caller will cancel a transaction
that has been marked dirty.
Modify xfs_bmap_shift_extents() to OR the logflags bits as modifications
are made to the inode bmap. Only log the inode in the exit path if
logflags has been set. This ensures we only have to cancel a dirty
transaction if modifications have been made and prevents an unnecessary
filesystem shutdown otherwise.
Signed-off-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Dave Chinner <david@fromorbit.com>
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Now we are not doing silly things with dirtying buffers beyond EOF
and using invalidation correctly, we can finally reduce the ranges of
writeback and invalidation used by direct IO to match that of the IO
being issued.
Bring the writeback and invalidation ranges back to match the
generic direct IO code - this will greatly reduce the perturbation
of cached data when direct IO and buffered IO are mixed, but still
provide the same buffered vs direct IO coherency behaviour we
currently have.
Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Dave Chinner <david@fromorbit.com>
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Similar to direct IO reads, direct IO writes are using
truncate_pagecache_range to invalidate the page cache. This is
incorrect due to the sub-block zeroing in the page cache that
truncate_pagecache_range() triggers.
This patch fixes things by using invalidate_inode_pages2_range
instead. It preserves the page cache invalidation, but won't zero
any pages.
cc: stable@vger.kernel.org
Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Dave Chinner <david@fromorbit.com>
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xfs is using truncate_pagecache_range to invalidate the page cache
during DIO reads. This is different from the other filesystems who
only invalidate pages during DIO writes.
truncate_pagecache_range is meant to be used when we are freeing the
underlying data structs from disk, so it will zero any partial
ranges in the page. This means a DIO read can zero out part of the
page cache page, and it is possible the page will stay in cache.
buffered reads will find an up to date page with zeros instead of
the data actually on disk.
This patch fixes things by using invalidate_inode_pages2_range
instead. It preserves the page cache invalidation, but won't zero
any pages.
[dchinner: catch error and warn if it fails. Comment.]
cc: stable@vger.kernel.org
Signed-off-by: Chris Mason <clm@fb.com>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Dave Chinner <david@fromorbit.com>
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generic/263 is failing fsx at this point with a page spanning
EOF that cannot be invalidated. The operations are:
1190 mapwrite 0x52c00 thru 0x5e569 (0xb96a bytes)
1191 mapread 0x5c000 thru 0x5d636 (0x1637 bytes)
1192 write 0x5b600 thru 0x771ff (0x1bc00 bytes)
where 1190 extents EOF from 0x54000 to 0x5e569. When the direct IO
write attempts to invalidate the cached page over this range, it
fails with -EBUSY and so any attempt to do page invalidation fails.
The real question is this: Why can't that page be invalidated after
it has been written to disk and cleaned?
Well, there's data on the first two buffers in the page (1k block
size, 4k page), but the third buffer on the page (i.e. beyond EOF)
is failing drop_buffers because it's bh->b_state == 0x3, which is
BH_Uptodate | BH_Dirty. IOWs, there's dirty buffers beyond EOF. Say
what?
OK, set_buffer_dirty() is called on all buffers from
__set_page_buffers_dirty(), regardless of whether the buffer is
beyond EOF or not, which means that when we get to ->writepage,
we have buffers marked dirty beyond EOF that we need to clean.
So, we need to implement our own .set_page_dirty method that
doesn't dirty buffers beyond EOF.
This is messy because the buffer code is not meant to be shared
and it has interesting locking issues on the buffer dirty bits.
So just copy and paste it and then modify it to suit what we need.
Note: the solutions the other filesystems and generic block code use
of marking the buffers clean in ->writepage does not work for XFS.
It still leaves dirty buffers beyond EOF and invalidations still
fail. Hence rather than play whack-a-mole, this patch simply
prevents those buffers from being dirtied in the first place.
cc: <stable@kernel.org>
Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
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Pull file locking bugfx from Jeff Layton:
"Just a bugfix for a bug that crept in to v3.15. It's in a rather rare
error path, and I'm not aware of anyone having hit it, but it's worth
fixing for v3.17"
* tag 'locks-v3.17-3' of git://git.samba.org/jlayton/linux:
locks: pass correct "before" pointer to locks_unlink_lock in generic_add_lease
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We need the parents of victims alive until namespace_unlock() gets to
dput() of the (ex-)mountpoints. However, that screws up the "is it
busy" checks in case when we have shrinkable mounts that need to be
killed. Solution: go ahead and decrement refcounts of parents right
in umount_tree(), increment them again just before dropping rwsem in
namespace_unlock() (and let the loop in the end of namespace_unlock()
finally drop those references for good, as we do now). Parents can't
get freed until we drop rwsem - at least one reference is kept until
then, both in case when parent is among the victims and when it is
not. So they'll still be around when we get to namespace_unlock().
Cc: stable@vger.kernel.org # 3.12+
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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The check in __propagate_umount() ("has somebody explicitly mounted
something on that slave?") is done *before* taking the already doomed
victims out of the child lists.
Cc: stable@vger.kernel.org
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
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Merge patches from Andrew Morton:
"22 fixes"
* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (22 commits)
kexec: purgatory: add clean-up for purgatory directory
Documentation/kdump/kdump.txt: add ARM description
flush_icache_range: export symbol to fix build errors
tools: selftests: fix build issue with make kselftests target
ocfs2: quorum: add a log for node not fenced
ocfs2: o2net: set tcp user timeout to max value
ocfs2: o2net: don't shutdown connection when idle timeout
ocfs2: do not write error flag to user structure we cannot copy from/to
x86/purgatory: use approprate -m64/-32 build flag for arch/x86/purgatory
drivers/rtc/rtc-s5m.c: re-add support for devices without irq specified
xattr: fix check for simultaneous glibc header inclusion
kexec: remove CONFIG_KEXEC dependency on crypto
kexec: create a new config option CONFIG_KEXEC_FILE for new syscall
x86,mm: fix pte_special versus pte_numa
hugetlb_cgroup: use lockdep_assert_held rather than spin_is_locked
mm/zpool: use prefixed module loading
zram: fix incorrect stat with failed_reads
lib: turn CONFIG_STACKTRACE into an actual option.
mm: actually clear pmd_numa before invalidating
memblock, memhotplug: fix wrong type in memblock_find_in_range_node().
...
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For debug use, we can see from the log whether the fence decision is
made and why it is not fenced.
Signed-off-by: Junxiao Bi <junxiao.bi@oracle.com>
Reviewed-by: Srinivas Eeda <srinivas.eeda@oracle.com>
Reviewed-by: Mark Fasheh <mfasheh@suse.de>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Joseph Qi <joseph.qi@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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When tcp retransmit timeout(15mins), the connection will be closed.
Pending messages may be lost during this time. So we set tcp user
timeout to override the retransmit timeout to the max value. This is OK
for ocfs2 since we have disk heartbeat, if peer crash, the disk
heartbeat will timeout and it will be evicted, if disk heartbeat not
timeout and connection idle for a long time, then this means the cluster
enters split-brain state, since fence can't happen, we'd better keep the
connection and wait network recover.
Signed-off-by: Junxiao Bi <junxiao.bi@oracle.com>
Reviewed-by: Srinivas Eeda <srinivas.eeda@oracle.com>
Reviewed-by: Mark Fasheh <mfasheh@suse.de>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Joseph Qi <joseph.qi@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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This patch series is to fix a possible message lost bug in ocfs2 when
network go bad. This bug will cause ocfs2 hung forever even network
become good again.
The messages may lost in this case. After the tcp connection is
established between two nodes, an idle timer will be set to check its
state periodically, if no messages are received during this time, idle
timer will timeout, it will shutdown the connection and try to
reconnect, so pending messages in tcp queues will be lost. This
messages may be from dlm. Dlm may get hung in this case. This may
cause the whole ocfs2 cluster hung.
This is very possible to happen when network state goes bad. Do the
reconnect is useless, it will fail if network state is still bad. Just
waiting there for network recovering may be a good idea, it will not
lost messages and some node will be fenced until cluster goes into
split-brain state, for this case, Tcp user timeout is used to override
the tcp retransmit timeout. It will timeout after 25 days, user should
have notice this through the provided log and fix the network, if they
don't, ocfs2 will fall back to original reconnect way.
This patch (of 3):
Some messages in the tcp queue maybe lost if we shutdown the connection
and reconnect when idle timeout. If packets lost and reconnect success,
then the ocfs2 cluster maybe hung.
To fix this, we can leave the connection there and do the fence decision
when idle timeout, if network recover before fence dicision is made, the
connection survive without lost any messages.
This bug can be saw when network state go bad. It may cause ocfs2 hung
forever if some packets lost. With this fix, ocfs2 will recover from
hung if network becomes good again.
Signed-off-by: Junxiao Bi <junxiao.bi@oracle.com>
Reviewed-by: Srinivas Eeda <srinivas.eeda@oracle.com>
Reviewed-by: Mark Fasheh <mfasheh@suse.de>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: Joseph Qi <joseph.qi@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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If we failed to copy from the structure, writing back the flags leaks 31
bits of kernel memory (the rest of the ir_flags field).
In any case, if we cannot copy from/to the structure, why should we
expect putting just the flags to work?
Also make sure ocfs2_info_handle_freeinode() returns the right error
code if the copy_to_user() fails.
Fixes: ddee5cdb70e6 ('Ocfs2: Add new OCFS2_IOC_INFO ioctl for ocfs2 v8.')
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
Cc: Joel Becker <jlbec@evilplan.org>
Acked-by: Mark Fasheh <mfasheh@suse.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Pull NFS client fixes from Trond Myklebust:
"Highlights:
- NFSv3 stable fix for another POSIX ACL regression
- NFSv4 stable fix for a regression with OPEN_DOWNGRADE
- NFSv4 stable fix for bad close() behaviour when holding a delegation"
* tag 'nfs-for-3.17-3' of git://git.linux-nfs.org/projects/trondmy/linux-nfs:
NFSv3: Fix another acl regression
NFSv4: Don't clear the open state when we just did an OPEN_DOWNGRADE
NFSv4: Fix problems with close in the presence of a delegation
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git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4
Pull ext4 bugfixes from Ted Ts'o:
"Ext4 bug fixes for 3.17, to provide better handling of memory
allocation failures, and to fix some journaling bugs involving
journal checksums and FALLOC_FL_ZERO_RANGE"
* tag 'ext4_for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4:
ext4: fix same-dir rename when inline data directory overflows
jbd2: fix descriptor block size handling errors with journal_csum
jbd2: fix infinite loop when recovering corrupt journal blocks
ext4: update i_disksize coherently with block allocation on error path
ext4: fix transaction issues for ext4_fallocate and ext_zero_range
ext4: fix incorect journal credits reservation in ext4_zero_range
ext4: move i_size,i_disksize update routines to helper function
ext4: fix BUG_ON in mb_free_blocks()
ext4: propagate errors up to ext4_find_entry()'s callers
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