From: Luis Chamberlain <mcgrof@kernel.org>
To: linux-xfs@vger.kernel.org, gregkh@linuxfoundation.org,
Alexander.Levin@microsoft.com
Cc: stable@vger.kernel.org, amir73il@gmail.com, hch@infradead.org,
Christoph Hellwig <hch@lst.de>,
Dave Chinner <david@fromorbit.com>,
Luis Chamberlain <mcgrof@kernel.org>
Subject: [PATCH v2 02/10] xfs: cancel COW blocks before swapext
Date: Mon, 4 Feb 2019 08:54:19 -0800 [thread overview]
Message-ID: <20190204165427.23607-3-mcgrof@kernel.org> (raw)
In-Reply-To: <20190204165427.23607-1-mcgrof@kernel.org>
From: Christoph Hellwig <hch@lst.de>
commit 96987eea537d6ccd98704a71958f9ba02da80843 upstream.
We need to make sure we have no outstanding COW blocks before we swap
extents, as there is nothing preventing us from having preallocated COW
delalloc on either inode that swapext is called on. That case can
easily be reproduced by running generic/324 in always_cow mode:
[ 620.760572] XFS: Assertion failed: tip->i_delayed_blks == 0, file: fs/xfs/xfs_bmap_util.c, line: 1669
[ 620.761608] ------------[ cut here ]------------
[ 620.762171] kernel BUG at fs/xfs/xfs_message.c:102!
[ 620.762732] invalid opcode: 0000 [#1] SMP PTI
[ 620.763272] CPU: 0 PID: 24153 Comm: xfs_fsr Tainted: G W 4.19.0-rc1+ #4182
[ 620.764203] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.11.1-1 04/01/2014
[ 620.765202] RIP: 0010:assfail+0x20/0x28
[ 620.765646] Code: 31 ff e8 83 fc ff ff 0f 0b c3 48 89 f1 41 89 d0 48 c7 c6 48 ca 8d 82 48 89 fa 38
[ 620.767758] RSP: 0018:ffffc9000898bc10 EFLAGS: 00010202
[ 620.768359] RAX: 0000000000000000 RBX: ffff88012f14ba40 RCX: 0000000000000000
[ 620.769174] RDX: 00000000ffffffc0 RSI: 000000000000000a RDI: ffffffff828560d9
[ 620.769982] RBP: ffff88012f14b300 R08: 0000000000000000 R09: 0000000000000000
[ 620.770788] R10: 000000000000000a R11: f000000000000000 R12: ffffc9000898bc98
[ 620.771638] R13: ffffc9000898bc9c R14: ffff880130b5e2b8 R15: ffff88012a1fa2a8
[ 620.772504] FS: 00007fdc36e0fbc0(0000) GS:ffff88013ba00000(0000) knlGS:0000000000000000
[ 620.773475] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 620.774168] CR2: 00007fdc3604d000 CR3: 0000000132afc000 CR4: 00000000000006f0
[ 620.774978] Call Trace:
[ 620.775274] xfs_swap_extent_forks+0x2a0/0x2e0
[ 620.775792] xfs_swap_extents+0x38b/0xab0
[ 620.776256] xfs_ioc_swapext+0x121/0x140
[ 620.776709] xfs_file_ioctl+0x328/0xc90
[ 620.777154] ? rcu_read_lock_sched_held+0x50/0x60
[ 620.777694] ? xfs_iunlock+0x233/0x260
[ 620.778127] ? xfs_setattr_nonsize+0x3be/0x6a0
[ 620.778647] do_vfs_ioctl+0x9d/0x680
[ 620.779071] ? ksys_fchown+0x47/0x80
[ 620.779552] ksys_ioctl+0x35/0x70
[ 620.780040] __x64_sys_ioctl+0x11/0x20
[ 620.780530] do_syscall_64+0x4b/0x190
[ 620.780927] entry_SYSCALL_64_after_hwframe+0x49/0xbe
[ 620.781467] RIP: 0033:0x7fdc364d0f07
[ 620.781900] Code: b3 66 90 48 8b 05 81 5f 2c 00 64 c7 00 26 00 00 00 48 c7 c0 ff ff ff ff c3 66 28
[ 620.784044] RSP: 002b:00007ffe2a766038 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[ 620.784896] RAX: ffffffffffffffda RBX: 0000000000000025 RCX: 00007fdc364d0f07
[ 620.785667] RDX: 0000560296ca2fc0 RSI: 00000000c0c0586d RDI: 0000000000000005
[ 620.786398] RBP: 0000000000000025 R08: 0000000000001200 R09: 0000000000000000
[ 620.787283] R10: 0000000000000432 R11: 0000000000000246 R12: 0000000000000005
[ 620.788051] R13: 0000000000000000 R14: 0000000000001000 R15: 0000000000000006
[ 620.788927] Modules linked in:
[ 620.789340] ---[ end trace 9503b7417ffdbdb0 ]---
[ 620.790065] RIP: 0010:assfail+0x20/0x28
[ 620.790642] Code: 31 ff e8 83 fc ff ff 0f 0b c3 48 89 f1 41 89 d0 48 c7 c6 48 ca 8d 82 48 89 fa 38
[ 620.793038] RSP: 0018:ffffc9000898bc10 EFLAGS: 00010202
[ 620.793609] RAX: 0000000000000000 RBX: ffff88012f14ba40 RCX: 0000000000000000
[ 620.794317] RDX: 00000000ffffffc0 RSI: 000000000000000a RDI: ffffffff828560d9
[ 620.795025] RBP: ffff88012f14b300 R08: 0000000000000000 R09: 0000000000000000
[ 620.795778] R10: 000000000000000a R11: f000000000000000 R12: ffffc9000898bc98
[ 620.796675] R13: ffffc9000898bc9c R14: ffff880130b5e2b8 R15: ffff88012a1fa2a8
[ 620.797782] FS: 00007fdc36e0fbc0(0000) GS:ffff88013ba00000(0000) knlGS:0000000000000000
[ 620.798908] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 620.799594] CR2: 00007fdc3604d000 CR3: 0000000132afc000 CR4: 00000000000006f0
[ 620.800424] Kernel panic - not syncing: Fatal exception
[ 620.801191] Kernel Offset: disabled
[ 620.801597] ---[ end Kernel panic - not syncing: Fatal exception ]---
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>
---
fs/xfs/xfs_bmap_util.c | 6 ++++++
1 file changed, 6 insertions(+)
diff --git a/fs/xfs/xfs_bmap_util.c b/fs/xfs/xfs_bmap_util.c
index 6de8d90041ff..9d1e5c3a661e 100644
--- a/fs/xfs/xfs_bmap_util.c
+++ b/fs/xfs/xfs_bmap_util.c
@@ -1824,6 +1824,12 @@ xfs_swap_extents(
if (error)
goto out_unlock;
+ if (xfs_inode_has_cow_data(tip)) {
+ error = xfs_reflink_cancel_cow_range(tip, 0, NULLFILEOFF, true);
+ if (error)
+ return error;
+ }
+
/*
* Extent "swapping" with rmap requires a permanent reservation and
* a block reservation because it's really just a remap operation
--
2.18.0
next prev parent reply other threads:[~2019-02-04 16:54 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-02-04 16:54 [PATCH v2 00/10] xfs: stable fixes for v4.19.y Luis Chamberlain
2019-02-04 16:54 ` [PATCH v2 01/10] xfs: Fix xqmstats offsets in /proc/fs/xfs/xqmstat Luis Chamberlain
2019-02-04 16:54 ` Luis Chamberlain [this message]
2019-02-04 16:54 ` [PATCH v2 03/10] xfs: Fix error code in 'xfs_ioc_getbmap()' Luis Chamberlain
2019-02-04 16:54 ` [PATCH v2 04/10] xfs: fix overflow in xfs_attr3_leaf_verify Luis Chamberlain
2019-02-04 16:54 ` [PATCH v2 05/10] xfs: fix shared extent data corruption due to missing cow reservation Luis Chamberlain
2019-02-04 16:54 ` [PATCH v2 06/10] xfs: fix transient reference count error in xfs_buf_resubmit_failed_buffers Luis Chamberlain
2019-02-04 16:54 ` [PATCH v2 07/10] xfs: delalloc -> unwritten COW fork allocation can go wrong Luis Chamberlain
2019-02-04 16:54 ` [PATCH v2 08/10] fs/xfs: fix f_ffree value for statfs when project quota is set Luis Chamberlain
2019-02-04 16:54 ` [PATCH v2 09/10] xfs: fix PAGE_MASK usage in xfs_free_file_space Luis Chamberlain
2019-02-04 16:54 ` [PATCH v2 10/10] xfs: fix inverted return from xfs_btree_sblock_verify_crc Luis Chamberlain
2019-02-05 6:44 ` [PATCH v2 00/10] xfs: stable fixes for v4.19.y Amir Goldstein
2019-02-05 22:06 ` Dave Chinner
2019-02-06 4:05 ` Sasha Levin
2019-02-06 21:54 ` Dave Chinner
2019-02-08 6:06 ` Sasha Levin
2019-02-08 20:06 ` Luis Chamberlain
2019-02-08 21:29 ` Dave Chinner
2019-02-09 17:53 ` Sasha Levin
2019-02-08 22:17 ` Luis Chamberlain
2019-02-09 21:56 ` Sasha Levin
2019-02-11 19:46 ` Luis Chamberlain
2019-02-08 19:48 ` Luis Chamberlain
2019-02-08 21:32 ` Dave Chinner
2019-02-08 21:50 ` Luis Chamberlain
2019-02-10 22:12 ` Dave Chinner
2019-02-11 20:09 ` Luis Chamberlain
2019-02-10 0:06 ` Sasha Levin
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