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commit 2a362249187a8d0f6d942d6e1d763d150a296f47 upstream.
Commit 4c63c2454ef incorrectly assumed that returning -ENOIOCTLCMD would
cause the native ioctl to be called. The ->compat_ioctl callback is
expected to handle all ioctls, not just compat variants. As a result,
when using 32-bit userspace on 64-bit kernels, everything except those
three ioctls would return -ENOTTY.
Fixes: 4c63c2454ef ("btrfs: bugfix: handle FS_IOC32_{GETFLAGS,SETFLAGS,GETVERSION} in btrfs_ioctl")
Cc: stable@vger.kernel.org
Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
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commit 57b59ed2e5b91e958843609c7884794e29e6c4cb upstream.
Subvolume directory inodes can't have ACLs.
Cc: <stable@vger.kernel.org> # 4.9.x
Signed-off-by: Omar Sandoval <osandov@fb.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: Chris Mason <clm@fb.com>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
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commit 67ade058ef2c65a3e56878af9c293ec76722a2e5 upstream.
As Jeff explained in c2951f32d36c ("btrfs: remove old tree_root dirent
processing in btrfs_real_readdir()"), supporting this old format is no
longer necessary since the Btrfs magic number has been updated since we
changed to the current format. There are other places where we still
handle this old format, but since this is part of a fix that is going to
stable, I'm only removing this one for now.
Cc: <stable@vger.kernel.org> # 4.9.x
Signed-off-by: Omar Sandoval <osandov@fb.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: Chris Mason <clm@fb.com>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
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commit aa7c8da35d1905d80e840d075f07d26ec90144b5 upstream.
In __btrfs_run_delayed_refs, the error path when run_delayed_extent_op
fails sets locked_ref->processing = 0 but doesn't re-increment
delayed_refs->num_heads_ready. As a result, we end up triggering
the WARN_ON in btrfs_select_ref_head.
Fixes: d7df2c796d7 (Btrfs: attach delayed ref updates to delayed ref heads)
Reported-by: Jon Nelson <jnelson-suse@jamponi.net>
Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Reviewed-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
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commit d0280996437081dd12ed1e982ac8aeaa62835ec4 upstream.
In __btrfs_run_delayed_refs, when we put back a delayed ref that's too
new, we have already dropped the lock on locked_ref when we set
->processing = 0.
This patch keeps the lock to cover that assignment.
Fixes: d7df2c796d7 (Btrfs: attach delayed ref updates to delayed ref heads)
Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Reviewed-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
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commit ac0c7cf8be00f269f82964cf7b144ca3edc5dbc4 upstream.
Enabling btrfs tracepoints leads to instant crash, as reported. The wq
callbacks could free the memory and the tracepoints started to
dereference the members to get to fs_info.
The proposed fix https://marc.info/?l=linux-btrfs&m=148172436722606&w=2
removed the tracepoints but we could preserve them by passing only the
required data in a safe way.
Fixes: bc074524e123 ("btrfs: prefix fsid to all trace events")
CC: stable@vger.kernel.org # 4.8+
Reported-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Reviewed-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
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commit 69ae5e4459e43e56f03d0987e865fbac2b05af2a upstream.
Indeed this just make the behavior similar to xfs when process has
fatal signals pending, and it'll make fstests/generic/298 happy.
Signed-off-by: Wang Xiaoguang <wangxg.fnst@cn.fujitsu.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit d5e84fd8d0634d056248b67463b42f6c85896a19 upstream.
Commit 951555856b88 ("Btrfs: send, don't bug on inconsistent snapshots")
removed some BUG_ON() statements (replacing them with returning errors
to user space and logging error messages) when a snapshot is in an
inconsistent state due to failures to update a delayed inode item (ENOMEM
or ENOSPC) after adding/updating/deleting references, xattrs or file
extent items.
However there is a case, when no errors happen, where a file extent item
can be modified without having the corresponding inode item updated. This
case happens during balance under very specific timings, when relocation
is in the stage where it updates data pointers and a leaf that contains
file extent items is COWed. When that happens file extent items get their
disk_bytenr field updated to a new value that reflects the post relocation
logical address of the extent, without updating their respective inode
items (as there is nothing that needs to be updated on them). This is
performed at relocation.c:replace_file_extents() through
relocation.c:btrfs_reloc_cow_block().
So make an incremental send deal with this case and don't do any processing
for a file extent item that got its disk_bytenr field updated by relocation,
since the extent's data is the same as the one pointed by the file extent
item in the parent snapshot.
After the recent commit mentioned above this case resulted in EIO errors
returned to user space (and an error message logged to dmesg/syslog) when
doing an incremental send, while before it, it resulted in hitting a
BUG_ON leading to the following trace:
[ 952.206705] ------------[ cut here ]------------
[ 952.206714] kernel BUG at ../fs/btrfs/send.c:5653!
[ 952.206719] Internal error: Oops - BUG: 0 [#1] SMP
[ 952.209854] Modules linked in: st dm_mod nls_utf8 isofs fuse nf_log_ipv6 xt_pkttype xt_physdev br_netfilter nf_log_ipv4 nf_log_common xt_LOG xt_limit ebtable_filter ebtables af_packet bridge stp llc ip6t_REJECT xt_tcpudp nf_conntrack_ipv6 nf_defrag_ipv6 ip6table_raw ipt_REJECT iptable_raw xt_CT iptable_filter ip6table_mangle nf_conntrack_netbios_ns nf_conntrack_broadcast nf_conntrack_ipv4 nf_defrag_ipv4 ip_tables xt_conntrack nf_conntrack ip6table_filter ip6_tables x_tables xfs libcrc32c nls_iso8859_1 nls_cp437 vfat fat joydev aes_ce_blk ablk_helper cryptd snd_intel8x0 aes_ce_cipher snd_ac97_codec ac97_bus snd_pcm ghash_ce sha2_ce sha1_ce snd_timer snd virtio_net soundcore btrfs xor sr_mod cdrom hid_generic usbhid raid6_pq virtio_blk virtio_scsi bochs_drm drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops ttm virtio_mmio xhci_pci xhci_hcd usbcore usb_common virtio_pci virtio_ring virtio drm sg efivarfs
[ 952.228333] Supported: Yes
[ 952.228908] CPU: 0 PID: 12779 Comm: snapperd Not tainted 4.4.14-50-default #1
[ 952.230329] Hardware name: QEMU KVM Virtual Machine, BIOS 0.0.0 02/06/2015
[ 952.231683] task: ffff800058e94100 ti: ffff8000d866c000 task.ti: ffff8000d866c000
[ 952.233279] PC is at changed_cb+0x9f4/0xa48 [btrfs]
[ 952.234375] LR is at changed_cb+0x58/0xa48 [btrfs]
[ 952.236552] pc : [<ffff7ffffc39de7c>] lr : [<ffff7ffffc39d4e0>] pstate: 80000145
[ 952.238049] sp : ffff8000d866fa20
[ 952.238732] x29: ffff8000d866fa20 x28: 0000000000000019
[ 952.239840] x27: 00000000000028d5 x26: 00000000000024a2
[ 952.241008] x25: 0000000000000002 x24: ffff8000e66e92f0
[ 952.242131] x23: ffff8000b8c76800 x22: ffff800092879140
[ 952.243238] x21: 0000000000000002 x20: ffff8000d866fb78
[ 952.244348] x19: ffff8000b8f8c200 x18: 0000000000002710
[ 952.245607] x17: 0000ffff90d42480 x16: ffff800000237dc0
[ 952.246719] x15: 0000ffff90de7510 x14: ab000c000a2faf08
[ 952.247835] x13: 0000000000577c2b x12: ab000c000b696665
[ 952.248981] x11: 2e65726f632f6966 x10: 652d34366d72612f
[ 952.250101] x9 : 32627572672f746f x8 : ab000c00092f1671
[ 952.251352] x7 : 8000000000577c2b x6 : ffff800053eadf45
[ 952.252468] x5 : 0000000000000000 x4 : ffff80005e169494
[ 952.253582] x3 : 0000000000000004 x2 : ffff8000d866fb78
[ 952.254695] x1 : 000000000003e2a3 x0 : 000000000003e2a4
[ 952.255803]
[ 952.256150] Process snapperd (pid: 12779, stack limit = 0xffff8000d866c020)
[ 952.257516] Stack: (0xffff8000d866fa20 to 0xffff8000d8670000)
[ 952.258654] fa20: ffff8000d866fae0 ffff7ffffc308fc0 ffff800092879140 ffff8000e66e92f0
[ 952.260219] fa40: 0000000000000035 ffff800055de6000 ffff8000b8c76800 ffff8000d866fb78
[ 952.261745] fa60: 0000000000000002 00000000000024a2 00000000000028d5 0000000000000019
[ 952.263269] fa80: ffff8000d866fae0 ffff7ffffc3090f0 ffff8000d866fae0 ffff7ffffc309128
[ 952.264797] faa0: ffff800092879140 ffff8000e66e92f0 0000000000000035 ffff800055de6000
[ 952.268261] fac0: ffff8000b8c76800 ffff8000d866fb78 0000000000000002 0000000000001000
[ 952.269822] fae0: ffff8000d866fbc0 ffff7ffffc39ecfc ffff8000b8f8c200 ffff8000b8f8c368
[ 952.271368] fb00: ffff8000b8f8c378 ffff800055de6000 0000000000000001 ffff8000ecb17500
[ 952.272893] fb20: ffff8000b8c76800 ffff800092879140 ffff800062b6d000 ffff80007a9e2470
[ 952.274420] fb40: ffff8000b8f8c208 0000000005784000 ffff8000580a8000 ffff8000b8f8c200
[ 952.276088] fb60: ffff7ffffc39d488 00000002b8f8c368 0000000000000000 000000000003e2a4
[ 952.280275] fb80: 000000000000006c ffff7ffffc39ec00 000000000003e2a4 000000000000006c
[ 952.283219] fba0: ffff8000b8f8c300 0000000000000100 0000000000000001 ffff8000ecb17500
[ 952.286166] fbc0: ffff8000d866fcd0 ffff7ffffc3643c0 ffff8000f8842700 0000ffff8ffe9278
[ 952.289136] fbe0: 0000000040489426 ffff800055de6000 0000ffff8ffe9278 0000000040489426
[ 952.292083] fc00: 000000000000011d 000000000000001d ffff80007a9e4598 ffff80007a9e43e8
[ 952.294959] fc20: ffff8000b8c7693f 0000000000003b24 0000000000000019 ffff8000b8f8c218
[ 952.301161] fc40: 00000001d866fc70 ffff8000b8c76800 0000000000000128 ffffffffffffff84
[ 952.305749] fc60: ffff800058e941ff 0000000000003a58 ffff8000d866fcb0 ffff8000000f7390
[ 952.308875] fc80: 000000000000012a 0000000000010290 ffff8000d866fc00 000000000000007b
[ 952.311915] fca0: 0000000000010290 ffff800046c1b100 74732d7366727462 000001006d616572
[ 952.314937] fcc0: ffff8000fffc4100 cb88537fdc8ba60e ffff8000d866fe10 ffff8000002499e8
[ 952.318008] fce0: 0000000040489426 ffff8000f8842700 0000ffff8ffe9278 ffff80007a9e4598
[ 952.321321] fd00: 0000ffff8ffe9278 0000000040489426 000000000000011d 000000000000001d
[ 952.324280] fd20: ffff80000072c000 ffff8000d866c000 ffff8000d866fda0 ffff8000000e997c
[ 952.327156] fd40: ffff8000fffc4180 00000000000031ed ffff8000fffc4180 ffff800046c1b7d4
[ 952.329895] fd60: 0000000000000140 0000ffff907ea170 000000000000011d 00000000000000dc
[ 952.334641] fd80: ffff80000072c000 ffff8000d866c000 0000000000000000 0000000000000002
[ 952.338002] fda0: ffff8000d866fdd0 ffff8000000ebacc ffff800046c1b080 ffff800046c1b7d4
[ 952.340724] fdc0: ffff8000d866fdf0 ffff8000000db67c 0000000000000040 ffff800000e69198
[ 952.343415] fde0: 0000ffff8ffea790 00000000000031ed ffff8000d866fe20 ffff800000254000
[ 952.346101] fe00: 000000000000001d 0000000000000004 ffff8000d866fe90 ffff800000249d3c
[ 952.348980] fe20: ffff8000f8842700 0000000000000000 ffff8000f8842701 0000000000000008
[ 952.351696] fe40: ffff8000d866fe70 0000000000000008 ffff8000d866fe90 ffff800000249cf8
[ 952.354387] fe60: ffff8000f8842700 0000ffff8ffe9170 ffff8000f8842701 0000000000000008
[ 952.357083] fe80: 0000ffff8ffe9278 ffff80008ff85500 0000ffff8ffe90c0 ffff800000085c84
[ 952.359800] fea0: 0000000000000000 0000ffff8ffe9170 ffffffffffffffff 0000ffff90d473bc
[ 952.365351] fec0: 0000000000000000 0000000000000015 0000000000000008 0000000040489426
[ 952.369550] fee0: 0000ffff8ffe9278 0000ffff907ea790 0000ffff907ea170 0000ffff907ea790
[ 952.372416] ff00: 0000ffff907ea170 0000000000000000 000000000000001d 0000000000000004
[ 952.375223] ff20: 0000ffff90a32220 00000000003d0f00 0000ffff907ea0a0 0000ffff8ffe8f30
[ 952.378099] ff40: 0000ffff9100f554 0000ffff91147000 0000ffff91117bc0 0000ffff90d473b0
[ 952.381115] ff60: 0000ffff9100f620 0000ffff880069b0 0000ffff8ffe9170 0000ffff8ffe91a0
[ 952.384003] ff80: 0000ffff8ffe9160 0000ffff8ffe9140 0000ffff88006990 0000ffff8ffe9278
[ 952.386860] ffa0: 0000ffff88008a60 0000ffff8ffe9480 0000ffff88014ca0 0000ffff8ffe90c0
[ 952.389654] ffc0: 0000ffff910be8e8 0000ffff8ffe90c0 0000ffff90d473bc 0000000000000000
[ 952.410986] ffe0: 0000000000000008 000000000000001d 6e2079747265706f 72616d223d656d61
[ 952.415497] Call trace:
[ 952.417403] [<ffff7ffffc39de7c>] changed_cb+0x9f4/0xa48 [btrfs]
[ 952.420023] [<ffff7ffffc308fc0>] btrfs_compare_trees+0x500/0x6b0 [btrfs]
[ 952.422759] [<ffff7ffffc39ecfc>] btrfs_ioctl_send+0xb4c/0xe10 [btrfs]
[ 952.425601] [<ffff7ffffc3643c0>] btrfs_ioctl+0x374/0x29a4 [btrfs]
[ 952.428031] [<ffff8000002499e8>] do_vfs_ioctl+0x33c/0x600
[ 952.430360] [<ffff800000249d3c>] SyS_ioctl+0x90/0xa4
[ 952.432552] [<ffff800000085c84>] el0_svc_naked+0x38/0x3c
[ 952.434803] Code: 2a1503e0 17fffdac b9404282 17ffff28 (d4210000)
[ 952.437457] ---[ end trace 9afd7090c466cf15 ]---
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 4867268c57ff709a7b6b86ae6f6537d846d1443a upstream.
Really there's lots of things that can go wrong here, kill all the
BUG_ON()'s and replace the logic ones with ASSERT()'s and return EIO
instead.
Signed-off-by: Josef Bacik <jbacik@fb.com>
[ switched to btrfs_err, errors go to common label ]
Reviewed-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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commit 0ccd05285e7f5a8e297e1d6dfc41e7c65757d6fa upstream.
btrfs_show_devname() is using the device_list_mutex, sometimes
a call to blkdev_put() leads vfs calling into this func. So
call blkdev_put() outside of device_list_mutex, as of now.
[ 983.284212] ======================================================
[ 983.290401] [ INFO: possible circular locking dependency detected ]
[ 983.296677] 4.8.0-rc5-ceph-00023-g1b39cec2 #1 Not tainted
[ 983.302081] -------------------------------------------------------
[ 983.308357] umount/21720 is trying to acquire lock:
[ 983.313243] (&bdev->bd_mutex){+.+.+.}, at: [<ffffffff9128ec51>] blkdev_put+0x31/0x150
[ 983.321264]
[ 983.321264] but task is already holding lock:
[ 983.327101] (&fs_devs->device_list_mutex){+.+...}, at: [<ffffffffc033d6f6>] __btrfs_close_devices+0x46/0x200 [btrfs]
[ 983.337839]
[ 983.337839] which lock already depends on the new lock.
[ 983.337839]
[ 983.346024]
[ 983.346024] the existing dependency chain (in reverse order) is:
[ 983.353512]
-> #4 (&fs_devs->device_list_mutex){+.+...}:
[ 983.359096] [<ffffffff910dfd0c>] lock_acquire+0x1bc/0x1f0
[ 983.365143] [<ffffffff91823125>] mutex_lock_nested+0x65/0x350
[ 983.371521] [<ffffffffc02d8116>] btrfs_show_devname+0x36/0x1f0 [btrfs]
[ 983.378710] [<ffffffff9129523e>] show_vfsmnt+0x4e/0x150
[ 983.384593] [<ffffffff9126ffc7>] m_show+0x17/0x20
[ 983.389957] [<ffffffff91276405>] seq_read+0x2b5/0x3b0
[ 983.395669] [<ffffffff9124c808>] __vfs_read+0x28/0x100
[ 983.401464] [<ffffffff9124eb3b>] vfs_read+0xab/0x150
[ 983.407080] [<ffffffff9124ec32>] SyS_read+0x52/0xb0
[ 983.412609] [<ffffffff91825fc0>] entry_SYSCALL_64_fastpath+0x23/0xc1
[ 983.419617]
-> #3 (namespace_sem){++++++}:
[ 983.424024] [<ffffffff910dfd0c>] lock_acquire+0x1bc/0x1f0
[ 983.430074] [<ffffffff918239e9>] down_write+0x49/0x80
[ 983.435785] [<ffffffff91272457>] lock_mount+0x67/0x1c0
[ 983.441582] [<ffffffff91272ab2>] do_add_mount+0x32/0xf0
[ 983.447458] [<ffffffff9127363a>] finish_automount+0x5a/0xc0
[ 983.453682] [<ffffffff91259513>] follow_managed+0x1b3/0x2a0
[ 983.459912] [<ffffffff9125b750>] lookup_fast+0x300/0x350
[ 983.465875] [<ffffffff9125d6e7>] path_openat+0x3a7/0xaa0
[ 983.471846] [<ffffffff9125ef75>] do_filp_open+0x85/0xe0
[ 983.477731] [<ffffffff9124c41c>] do_sys_open+0x14c/0x1f0
[ 983.483702] [<ffffffff9124c4de>] SyS_open+0x1e/0x20
[ 983.489240] [<ffffffff91825fc0>] entry_SYSCALL_64_fastpath+0x23/0xc1
[ 983.496254]
-> #2 (&sb->s_type->i_mutex_key#3){+.+.+.}:
[ 983.501798] [<ffffffff910dfd0c>] lock_acquire+0x1bc/0x1f0
[ 983.507855] [<ffffffff918239e9>] down_write+0x49/0x80
[ 983.513558] [<ffffffff91366237>] start_creating+0x87/0x100
[ 983.519703] [<ffffffff91366647>] debugfs_create_dir+0x17/0x100
[ 983.526195] [<ffffffff911df153>] bdi_register+0x93/0x210
[ 983.532165] [<ffffffff911df313>] bdi_register_owner+0x43/0x70
[ 983.538570] [<ffffffff914080fb>] device_add_disk+0x1fb/0x450
[ 983.544888] [<ffffffff91580226>] loop_add+0x1e6/0x290
[ 983.550596] [<ffffffff91fec358>] loop_init+0x10b/0x14f
[ 983.556394] [<ffffffff91002207>] do_one_initcall+0xa7/0x180
[ 983.562618] [<ffffffff91f932e0>] kernel_init_freeable+0x1cc/0x266
[ 983.569370] [<ffffffff918174be>] kernel_init+0xe/0x100
[ 983.575166] [<ffffffff9182620f>] ret_from_fork+0x1f/0x40
[ 983.581131]
-> #1 (loop_index_mutex){+.+.+.}:
[ 983.585801] [<ffffffff910dfd0c>] lock_acquire+0x1bc/0x1f0
[ 983.591858] [<ffffffff91823125>] mutex_lock_nested+0x65/0x350
[ 983.598256] [<ffffffff9157ed3f>] lo_open+0x1f/0x60
[ 983.603704] [<ffffffff9128eec3>] __blkdev_get+0x123/0x400
[ 983.609757] [<ffffffff9128f4ea>] blkdev_get+0x34a/0x350
[ 983.615639] [<ffffffff9128f554>] blkdev_open+0x64/0x80
[ 983.621428] [<ffffffff9124aff6>] do_dentry_open+0x1c6/0x2d0
[ 983.627651] [<ffffffff9124c029>] vfs_open+0x69/0x80
[ 983.633181] [<ffffffff9125db74>] path_openat+0x834/0xaa0
[ 983.639152] [<ffffffff9125ef75>] do_filp_open+0x85/0xe0
[ 983.645035] [<ffffffff9124c41c>] do_sys_open+0x14c/0x1f0
[ 983.650999] [<ffffffff9124c4de>] SyS_open+0x1e/0x20
[ 983.656535] [<ffffffff91825fc0>] entry_SYSCALL_64_fastpath+0x23/0xc1
[ 983.663541]
-> #0 (&bdev->bd_mutex){+.+.+.}:
[ 983.668107] [<ffffffff910def43>] __lock_acquire+0x1003/0x17b0
[ 983.674510] [<ffffffff910dfd0c>] lock_acquire+0x1bc/0x1f0
[ 983.680561] [<ffffffff91823125>] mutex_lock_nested+0x65/0x350
[ 983.686967] [<ffffffff9128ec51>] blkdev_put+0x31/0x150
[ 983.692761] [<ffffffffc033481f>] btrfs_close_bdev+0x4f/0x60 [btrfs]
[ 983.699699] [<ffffffffc033d77b>] __btrfs_close_devices+0xcb/0x200 [btrfs]
[ 983.707178] [<ffffffffc033d8db>] btrfs_close_devices+0x2b/0xa0 [btrfs]
[ 983.714380] [<ffffffffc03081c5>] close_ctree+0x265/0x340 [btrfs]
[ 983.721061] [<ffffffffc02d7959>] btrfs_put_super+0x19/0x20 [btrfs]
[ 983.727908] [<ffffffff91250e2f>] generic_shutdown_super+0x6f/0x100
[ 983.734744] [<ffffffff91250f56>] kill_anon_super+0x16/0x30
[ 983.740888] [<ffffffffc02da97e>] btrfs_kill_super+0x1e/0x130 [btrfs]
[ 983.747909] [<ffffffff91250fe9>] deactivate_locked_super+0x49/0x80
[ 983.754745] [<ffffffff912515fd>] deactivate_super+0x5d/0x70
[ 983.760977] [<ffffffff91270a1c>] cleanup_mnt+0x5c/0x80
[ 983.766773] [<ffffffff91270a92>] __cleanup_mnt+0x12/0x20
[ 983.772738] [<ffffffff910aa2fe>] task_work_run+0x7e/0xc0
[ 983.778708] [<ffffffff91081b5a>] exit_to_usermode_loop+0x7e/0xb4
[ 983.785373] [<ffffffff910039eb>] syscall_return_slowpath+0xbb/0xd0
[ 983.792212] [<ffffffff9182605c>] entry_SYSCALL_64_fastpath+0xbf/0xc1
[ 983.799225]
[ 983.799225] other info that might help us debug this:
[ 983.799225]
[ 983.807291] Chain exists of:
&bdev->bd_mutex --> namespace_sem --> &fs_devs->device_list_mutex
[ 983.816521] Possible unsafe locking scenario:
[ 983.816521]
[ 983.822489] CPU0 CPU1
[ 983.827043] ---- ----
[ 983.831599] lock(&fs_devs->device_list_mutex);
[ 983.836289] lock(namespace_sem);
[ 983.842268] lock(&fs_devs->device_list_mutex);
[ 983.849478] lock(&bdev->bd_mutex);
[ 983.853127]
[ 983.853127] *** DEADLOCK ***
[ 983.853127]
[ 983.859113] 3 locks held by umount/21720:
[ 983.863145] #0: (&type->s_umount_key#35){++++..}, at: [<ffffffff912515f5>] deactivate_super+0x55/0x70
[ 983.872713] #1: (uuid_mutex){+.+.+.}, at: [<ffffffffc033d8d3>] btrfs_close_devices+0x23/0xa0 [btrfs]
[ 983.882206] #2: (&fs_devs->device_list_mutex){+.+...}, at: [<ffffffffc033d6f6>] __btrfs_close_devices+0x46/0x200 [btrfs]
[ 983.893422]
[ 983.893422] stack backtrace:
[ 983.897824] CPU: 6 PID: 21720 Comm: umount Not tainted 4.8.0-rc5-ceph-00023-g1b39cec2 #1
[ 983.905958] Hardware name: Supermicro SYS-5018R-WR/X10SRW-F, BIOS 1.0c 09/07/2015
[ 983.913492] 0000000000000000 ffff8c8a53c17a38 ffffffff91429521 ffffffff9260f4f0
[ 983.921018] ffffffff92642760 ffff8c8a53c17a88 ffffffff911b2b04 0000000000000050
[ 983.928542] ffffffff9237d620 ffff8c8a5294aee0 ffff8c8a5294aeb8 ffff8c8a5294aee0
[ 983.936072] Call Trace:
[ 983.938545] [<ffffffff91429521>] dump_stack+0x85/0xc4
[ 983.943715] [<ffffffff911b2b04>] print_circular_bug+0x1fb/0x20c
[ 983.949748] [<ffffffff910def43>] __lock_acquire+0x1003/0x17b0
[ 983.955613] [<ffffffff910dfd0c>] lock_acquire+0x1bc/0x1f0
[ 983.961123] [<ffffffff9128ec51>] ? blkdev_put+0x31/0x150
[ 983.966550] [<ffffffff91823125>] mutex_lock_nested+0x65/0x350
[ 983.972407] [<ffffffff9128ec51>] ? blkdev_put+0x31/0x150
[ 983.977832] [<ffffffff9128ec51>] blkdev_put+0x31/0x150
[ 983.983101] [<ffffffffc033481f>] btrfs_close_bdev+0x4f/0x60 [btrfs]
[ 983.989500] [<ffffffffc033d77b>] __btrfs_close_devices+0xcb/0x200 [btrfs]
[ 983.996415] [<ffffffffc033d8db>] btrfs_close_devices+0x2b/0xa0 [btrfs]
[ 984.003068] [<ffffffffc03081c5>] close_ctree+0x265/0x340 [btrfs]
[ 984.009189] [<ffffffff9126cc5e>] ? evict_inodes+0x15e/0x170
[ 984.014881] [<ffffffffc02d7959>] btrfs_put_super+0x19/0x20 [btrfs]
[ 984.021176] [<ffffffff91250e2f>] generic_shutdown_super+0x6f/0x100
[ 984.027476] [<ffffffff91250f56>] kill_anon_super+0x16/0x30
[ 984.033082] [<ffffffffc02da97e>] btrfs_kill_super+0x1e/0x130 [btrfs]
[ 984.039548] [<ffffffff91250fe9>] deactivate_locked_super+0x49/0x80
[ 984.045839] [<ffffffff912515fd>] deactivate_super+0x5d/0x70
[ 984.051525] [<ffffffff91270a1c>] cleanup_mnt+0x5c/0x80
[ 984.056774] [<ffffffff91270a92>] __cleanup_mnt+0x12/0x20
[ 984.062201] [<ffffffff910aa2fe>] task_work_run+0x7e/0xc0
[ 984.067625] [<ffffffff91081b5a>] exit_to_usermode_loop+0x7e/0xb4
[ 984.073747] [<ffffffff910039eb>] syscall_return_slowpath+0xbb/0xd0
[ 984.080038] [<ffffffff9182605c>] entry_SYSCALL_64_fastpath+0xbf/0xc1
Reported-by: Ilya Dryomov <idryomov@gmail.com>
Signed-off-by: Anand Jain <anand.jain@oracle.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
commit a958eab0ed7fdc1b977bc25d3af6efedaa945488 upstream.
The extent buffer 'next' needs to be free'd conditionally.
Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
commit cea67ab92d3d4da9f2b4141d87cb8664757daca0 upstream.
btrfs_rm_device frees the block device but then re-opens it using
the saved device name. A race exists between the close and the
re-open that allows the block size to be changed. The result
is getting stuck forever in the reclaim loop in __getblk_slow.
This patch moves the superblock cleanup before closing the block
device, which is also consistent with other callers. We also don't
need a private copy of dev_name as the whole routine operates under
the uuid_mutex.
Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
commit 6bdf131fac2336adb1a628f992ba32384f653a55 upstream.
We don't track the reloc roots in any sort of normal way, so the only way the
root/commit_root nodes get free'd is if the relocation finishes successfully and
the reloc root is deleted. Fix this by free'ing them in free_reloc_roots.
Thanks,
Signed-off-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
commit 3561b9db70928f207be4570b48fc19898eeaef54 upstream.
When relocating tree blocks, we firstly get block information from
back references in the extent tree, we then search fs tree to try to
find all parents of a block.
However, if fs tree is corrupted, eg. if there're some missing
items, we could come across these WARN_ONs and BUG_ONs.
This makes us print some error messages and return gracefully
from balance.
Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Reviewed-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
commit 49303381f19ab16a371a061b67e783d3f570d56e upstream.
Currently we allow inconsistence about mixed flag
(BTRFS_BLOCK_GROUP_METADATA | BTRFS_BLOCK_GROUP_DATA).
We'd get ENOSPC if block group has mixed flag and btrfs doesn't.
If that happens, we have one space_info with mixed flag and another
space_info only with BTRFS_BLOCK_GROUP_METADATA, and
global_block_rsv.space_info points to the latter one, but all bytes
from block_group contributes to the mixed space_info, thus all the
allocation will fail with ENOSPC.
This adds a check for the above case.
Reported-by: Vegard Nossum <vegard.nossum@oracle.com>
Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
[ updated message ]
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
commit 2571e739677f1e4c0c63f5ed49adcc0857923625 upstream.
So we can read a btree block via readahead or intentional read,
and we can end up with a memory leak when something happens as
follows,
1) readahead starts to read block A but does not wait for read
completion,
2) btree_readpage_end_io_hook finds that block A is corrupted,
and it needs to clear all block A's pages' uptodate bit.
3) meanwhile an intentional read kicks in and checks block A's
pages' uptodate to decide which page needs to be read.
4) when some pages have the uptodate bit during 3)'s check so
3) doesn't count them for eb->io_pages, but they are later
cleared by 2) so we has to readpage on the page, we get
the wrong eb->io_pages which results in a memory leak of
this block.
This fixes the problem by firstly getting all pages's locking and
then checking pages' uptodate bit.
t1(readahead) t2(readahead endio) t3(the following read)
read_extent_buffer_pages end_bio_extent_readpage
for pg in eb: for page 0,1,2 in eb:
if pg is uptodate: btree_readpage_end_io_hook(pg)
num_reads++ if uptodate:
eb->io_pages = num_reads SetPageUptodate(pg) _______________
for pg in eb: for page 3 in eb: read_extent_buffer_pages
if pg is NOT uptodate: btree_readpage_end_io_hook(pg) for pg in eb:
__extent_read_full_page(pg) sanity check reports something wrong if pg is uptodate:
clear_extent_buffer_uptodate(eb) num_reads++
for pg in eb: eb->io_pages = num_reads
ClearPageUptodate(page) _______________
for pg in eb:
if pg is NOT uptodate:
__extent_read_full_page(pg)
So t3's eb->io_pages is not consistent with the number of pages it's reading,
and during endio(), atomic_dec_and_test(&eb->io_pages) will get a negative
number so that we're not able to free the eb.
Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
commit 8d9eddad19467b008e0c881bc3133d7da94b7ec1 upstream.
We were setting the qgroup_rescan_running flag to true only after the
rescan worker started (which is a task run by a queue). So if a user
space task starts a rescan and immediately after asks to wait for the
rescan worker to finish, this second call might happen before the rescan
worker task starts running, in which case the rescan wait ioctl returns
immediatley, not waiting for the rescan worker to finish.
This was making the fstest btrfs/022 fail very often.
Fixes: d2c609b834d6 (btrfs: properly track when rescan worker is running)
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
commit f177d73949bf758542ca15a1c1945bd2e802cc65 upstream.
We can not simply use the owner field from an extent buffer's header to
get the id of the respective tree when the extent buffer is from a
relocation tree. When we create the root for a relocation tree we leave
(on purpose) the owner field with the same value as the subvolume's tree
root (we do this at ctree.c:btrfs_copy_root()). So we must ignore extent
buffers from relocation trees, which have the BTRFS_HEADER_FLAG_RELOC
flag set, because otherwise we will always consider the extent buffer
as not being the root of the tree (the root of original subvolume tree
is always different from the root of the respective relocation tree).
This lead to assertion failures when running with the integrity checker
enabled (CONFIG_BTRFS_FS_CHECK_INTEGRITY=y) such as the following:
[ 643.393409] BTRFS critical (device sdg): corrupt leaf, non-root leaf's nritems is 0: block=38506496, root=260, slot=0
[ 643.397609] BTRFS info (device sdg): leaf 38506496 total ptrs 0 free space 3995
[ 643.407075] assertion failed: 0, file: fs/btrfs/disk-io.c, line: 4078
[ 643.408425] ------------[ cut here ]------------
[ 643.409112] kernel BUG at fs/btrfs/ctree.h:3419!
[ 643.409773] invalid opcode: 0000 [#1] PREEMPT SMP
[ 643.410447] Modules linked in: dm_flakey dm_mod crc32c_generic btrfs xor raid6_pq ppdev psmouse acpi_cpufreq parport_pc evdev parport tpm_tis tpm_tis_core pcspkr serio_raw i2c_piix4 sg tpm i2c_core button processor loop autofs4 ext4 crc16 jbd2 mbcache sr_mod cdrom sd_mod ata_generic virtio_scsi ata_piix libata virtio_pci virtio_ring scsi_mod virtio e1000 floppy
[ 643.414356] CPU: 11 PID: 32726 Comm: btrfs Not tainted 4.8.0-rc8-btrfs-next-35+ #1
[ 643.414356] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.9.1-0-gb3ef39f-prebuilt.qemu-project.org 04/01/2014
[ 643.414356] task: ffff880145e95b00 task.stack: ffff88014826c000
[ 643.414356] RIP: 0010:[<ffffffffa0352759>] [<ffffffffa0352759>] assfail.constprop.41+0x1c/0x1e [btrfs]
[ 643.414356] RSP: 0018:ffff88014826fa28 EFLAGS: 00010292
[ 643.414356] RAX: 0000000000000039 RBX: ffff88014e2d7c38 RCX: 0000000000000001
[ 643.414356] RDX: ffff88023f4d2f58 RSI: ffffffff81806c63 RDI: 00000000ffffffff
[ 643.414356] RBP: ffff88014826fa28 R08: 0000000000000001 R09: 0000000000000000
[ 643.414356] R10: ffff88014826f918 R11: ffffffff82f3c5ed R12: ffff880172910000
[ 643.414356] R13: ffff880233992230 R14: ffff8801a68a3310 R15: fffffffffffffff8
[ 643.414356] FS: 00007f9ca305e8c0(0000) GS:ffff88023f4c0000(0000) knlGS:0000000000000000
[ 643.414356] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 643.414356] CR2: 00007f9ca3071000 CR3: 000000015d01b000 CR4: 00000000000006e0
[ 643.414356] Stack:
[ 643.414356] ffff88014826fa50 ffffffffa02d655a 000000000000000a ffff88014e2d7c38
[ 643.414356] 0000000000000000 ffff88014826faa8 ffffffffa02b72f3 ffff88014826fab8
[ 643.414356] 00ffffffa03228e4 0000000000000000 0000000000000000 ffff8801bbd4e000
[ 643.414356] Call Trace:
[ 643.414356] [<ffffffffa02d655a>] btrfs_mark_buffer_dirty+0xdf/0xe5 [btrfs]
[ 643.414356] [<ffffffffa02b72f3>] btrfs_copy_root+0x18a/0x1d1 [btrfs]
[ 643.414356] [<ffffffffa0322921>] create_reloc_root+0x72/0x1ba [btrfs]
[ 643.414356] [<ffffffffa03267c2>] btrfs_init_reloc_root+0x7b/0xa7 [btrfs]
[ 643.414356] [<ffffffffa02d9e44>] record_root_in_trans+0xdf/0xed [btrfs]
[ 643.414356] [<ffffffffa02db04e>] btrfs_record_root_in_trans+0x50/0x6a [btrfs]
[ 643.414356] [<ffffffffa030ad2b>] create_subvol+0x472/0x773 [btrfs]
[ 643.414356] [<ffffffffa030b406>] btrfs_mksubvol+0x3da/0x463 [btrfs]
[ 643.414356] [<ffffffffa030b406>] ? btrfs_mksubvol+0x3da/0x463 [btrfs]
[ 643.414356] [<ffffffff810781ac>] ? preempt_count_add+0x65/0x68
[ 643.414356] [<ffffffff811a6e97>] ? __mnt_want_write+0x62/0x77
[ 643.414356] [<ffffffffa030b55d>] btrfs_ioctl_snap_create_transid+0xce/0x187 [btrfs]
[ 643.414356] [<ffffffffa030b67d>] btrfs_ioctl_snap_create+0x67/0x81 [btrfs]
[ 643.414356] [<ffffffffa030ecfd>] btrfs_ioctl+0x508/0x20dd [btrfs]
[ 643.414356] [<ffffffff81293e39>] ? __this_cpu_preempt_check+0x13/0x15
[ 643.414356] [<ffffffff81155eca>] ? handle_mm_fault+0x976/0x9ab
[ 643.414356] [<ffffffff81091300>] ? arch_local_irq_save+0x9/0xc
[ 643.414356] [<ffffffff8119a2b0>] vfs_ioctl+0x18/0x34
[ 643.414356] [<ffffffff8119a8e8>] do_vfs_ioctl+0x581/0x600
[ 643.414356] [<ffffffff814b9552>] ? entry_SYSCALL_64_fastpath+0x5/0xa8
[ 643.414356] [<ffffffff81093fe9>] ? trace_hardirqs_on_caller+0x17b/0x197
[ 643.414356] [<ffffffff8119a9be>] SyS_ioctl+0x57/0x79
[ 643.414356] [<ffffffff814b9565>] entry_SYSCALL_64_fastpath+0x18/0xa8
[ 643.414356] [<ffffffff81091b08>] ? trace_hardirqs_off_caller+0x3f/0xaa
[ 643.414356] Code: 89 83 88 00 00 00 31 c0 5b 41 5c 41 5d 5d c3 55 89 f1 48 c7 c2 98 bc 35 a0 48 89 fe 48 c7 c7 05 be 35 a0 48 89 e5 e8 13 46 dd e0 <0f> 0b 55 89 f1 48 c7 c2 9f d3 35 a0 48 89 fe 48 c7 c7 7a d5 35
[ 643.414356] RIP [<ffffffffa0352759>] assfail.constprop.41+0x1c/0x1e [btrfs]
[ 643.414356] RSP <ffff88014826fa28>
[ 643.468267] ---[ end trace 6a1b3fb1a9d7d6e3 ]---
This can be easily reproduced by running xfstests with the integrity
checker enabled.
Fixes: 1ba98d086fe3 (Btrfs: detect corruption when non-root leaf has zero item)
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
commit ed0df618b1b06d7431ee4d985317fc5419a5d559 upstream.
The balance status item contains currently known filter values, but the
stripes filter was unintentionally not among them. This would mean, that
interrupted and automatically restarted balance does not apply the
stripe filters.
Fixes: dee32d0ac3719ef8d640efaf0884111df444730f
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
commit 054570a1dc94de20e7a612cddcc5a97db9c37b6f upstream.
During relocation of a data block group we create a relocation tree
for each fs/subvol tree by making a snapshot of each tree using
btrfs_copy_root() and the tree's commit root, and then setting the last
snapshot field for the fs/subvol tree's root to the value of the current
transaction id minus 1. However this can lead to relocation later
dropping references that it did not create if we have qgroups enabled,
leaving the filesystem in an inconsistent state that keeps aborting
transactions.
Lets consider the following example to explain the problem, which requires
qgroups to be enabled.
We are relocating data block group Y, we have a subvolume with id 258 that
has a root at level 1, that subvolume is used to store directory entries
for snapshots and we are currently at transaction 3404.
When committing transaction 3404, we have a pending snapshot and therefore
we call btrfs_run_delayed_items() at transaction.c:create_pending_snapshot()
in order to create its dentry at subvolume 258. This results in COWing
leaf A from root 258 in order to add the dentry. Note that leaf A
also contains file extent items referring to extents from some other
block group X (we are currently relocating block group Y). Later on, still
at create_pending_snapshot() we call qgroup_account_snapshot(), which
switches the commit root for root 258 when it calls switch_commit_roots(),
so now the COWed version of leaf A, lets call it leaf A', is accessible
from the commit root of tree 258. At the end of qgroup_account_snapshot(),
we call record_root_in_trans() with 258 as its argument, which results
in btrfs_init_reloc_root() being called, which in turn calls
relocation.c:create_reloc_root() in order to create a relocation tree
associated to root 258, which results in assigning the value of 3403
(which is the current transaction id minus 1 = 3404 - 1) to the
last_snapshot field of root 258. When creating the relocation tree root
at ctree.c:btrfs_copy_root() we add a shared reference for leaf A',
corresponding to the relocation tree's root, when we call btrfs_inc_ref()
against the COWed root (a copy of the commit root from tree 258), which
is at level 1. So at this point leaf A' has 2 references, one normal
reference corresponding to root 258 and one shared reference corresponding
to the root of the relocation tree.
Transaction 3404 finishes its commit and transaction 3405 is started by
relocation when calling merge_reloc_root() for the relocation tree
associated to root 258. In the meanwhile leaf A' is COWed again, in
response to some filesystem operation, when we are still at transaction
3405. However when we COW leaf A', at ctree.c:update_ref_for_cow(), we
call btrfs_block_can_be_shared() in order to figure out if other trees
refer to the leaf and if any such trees exists, add a full back reference
to leaf A' - but btrfs_block_can_be_shared() incorrectly returns false
because the following condition is false:
btrfs_header_generation(buf) <= btrfs_root_last_snapshot(&root->root_item)
which evaluates to 3404 <= 3403. So after leaf A' is COWed, it stays with
only one reference, corresponding to the shared reference we created when
we called btrfs_copy_root() to create the relocation tree's root and
btrfs_inc_ref() ends up not being called for leaf A' nor we end up setting
the flag BTRFS_BLOCK_FLAG_FULL_BACKREF in leaf A'. This results in not
adding shared references for the extents from block group X that leaf A'
refers to with its file extent items.
Later, after merging the relocation root we do a call to to
btrfs_drop_snapshot() in order to delete the relocation tree. This ends
up calling do_walk_down() when path->slots[1] points to leaf A', which
results in calling btrfs_lookup_extent_info() to get the number of
references for leaf A', which is 1 at this time (only the shared reference
exists) and this value is stored at wc->refs[0]. After this walk_up_proc()
is called when wc->level is 0 and path->nodes[0] corresponds to leaf A'.
Because the current level is 0 and wc->refs[0] is 1, it does call
btrfs_dec_ref() against leaf A', which results in removing the single
references that the extents from block group X have which are associated
to root 258 - the expectation was to have each of these extents with 2
references - one reference for root 258 and one shared reference related
to the root of the relocation tree, and so we would drop only the shared
reference (because leaf A' was supposed to have the flag
BTRFS_BLOCK_FLAG_FULL_BACKREF set).
This leaves the filesystem in an inconsistent state as we now have file
extent items in a subvolume tree that point to extents from block group X
without references in the extent tree. So later on when we try to decrement
the references for these extents, for example due to a file unlink operation,
truncate operation or overwriting ranges of a file, we fail because the
expected references do not exist in the extent tree.
This leads to warnings and transaction aborts like the following:
[ 588.965795] ------------[ cut here ]------------
[ 588.965815] WARNING: CPU: 2 PID: 2479 at fs/btrfs/extent-tree.c:1625 lookup_inline_extent_backref+0x432/0x5b0 [btrfs]
[ 588.965816] Modules linked in: af_packet iscsi_ibft iscsi_boot_sysfs xfs libcrc32c ppdev acpi_cpufreq button tpm_tis e1000 i2c_piix4 pcspkr parport_pc
parport tpm qemu_fw_cfg joydev btrfs xor raid6_pq sr_mod cdrom ata_generic virtio_scsi ata_piix virtio_pci bochs_drm virtio_ring drm_kms_helper syscopyarea
sysfillrect sysimgblt fb_sys_fops virtio ttm serio_raw drm floppy sg
[ 588.965831] CPU: 2 PID: 2479 Comm: kworker/u8:7 Not tainted 4.7.3-3-default-fdm+ #1
[ 588.965832] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.9.1-0-gb3ef39f-prebuilt.qemu-project.org 04/01/2014
[ 588.965844] Workqueue: btrfs-extent-refs btrfs_extent_refs_helper [btrfs]
[ 588.965845] 0000000000000000 ffff8802263bfa28 ffffffff813af542 0000000000000000
[ 588.965847] 0000000000000000 ffff8802263bfa68 ffffffff81081e8b 0000065900000000
[ 588.965848] ffff8801db2af000 000000012bbe2000 0000000000000000 ffff880215703b48
[ 588.965849] Call Trace:
[ 588.965852] [<ffffffff813af542>] dump_stack+0x63/0x81
[ 588.965854] [<ffffffff81081e8b>] __warn+0xcb/0xf0
[ 588.965855] [<ffffffff81081f7d>] warn_slowpath_null+0x1d/0x20
[ 588.965863] [<ffffffffa0175042>] lookup_inline_extent_backref+0x432/0x5b0 [btrfs]
[ 588.965865] [<ffffffff81143220>] ? trace_clock_local+0x10/0x30
[ 588.965867] [<ffffffff8114c5df>] ? rb_reserve_next_event+0x6f/0x460
[ 588.965875] [<ffffffffa0175215>] insert_inline_extent_backref+0x55/0xd0 [btrfs]
[ 588.965882] [<ffffffffa017531f>] __btrfs_inc_extent_ref.isra.55+0x8f/0x240 [btrfs]
[ 588.965890] [<ffffffffa017acea>] __btrfs_run_delayed_refs+0x74a/0x1260 [btrfs]
[ 588.965892] [<ffffffff810cb046>] ? cpuacct_charge+0x86/0xa0
[ 588.965900] [<ffffffffa017e74f>] btrfs_run_delayed_refs+0x9f/0x2c0 [btrfs]
[ 588.965908] [<ffffffffa017ea04>] delayed_ref_async_start+0x94/0xb0 [btrfs]
[ 588.965918] [<ffffffffa01c799a>] btrfs_scrubparity_helper+0xca/0x350 [btrfs]
[ 588.965928] [<ffffffffa01c7c5e>] btrfs_extent_refs_helper+0xe/0x10 [btrfs]
[ 588.965930] [<ffffffff8109b323>] process_one_work+0x1f3/0x4e0
[ 588.965931] [<ffffffff8109b658>] worker_thread+0x48/0x4e0
[ 588.965932] [<ffffffff8109b610>] ? process_one_work+0x4e0/0x4e0
[ 588.965934] [<ffffffff810a1659>] kthread+0xc9/0xe0
[ 588.965936] [<ffffffff816f2f1f>] ret_from_fork+0x1f/0x40
[ 588.965937] [<ffffffff810a1590>] ? kthread_worker_fn+0x170/0x170
[ 588.965938] ---[ end trace 34e5232c933a1749 ]---
[ 588.966187] ------------[ cut here ]------------
[ 588.966196] WARNING: CPU: 2 PID: 2479 at fs/btrfs/extent-tree.c:2966 btrfs_run_delayed_refs+0x28c/0x2c0 [btrfs]
[ 588.966196] BTRFS: Transaction aborted (error -5)
[ 588.966197] Modules linked in: af_packet iscsi_ibft iscsi_boot_sysfs xfs libcrc32c ppdev acpi_cpufreq button tpm_tis e1000 i2c_piix4 pcspkr parport_pc
parport tpm qemu_fw_cfg joydev btrfs xor raid6_pq sr_mod cdrom ata_generic virtio_scsi ata_piix virtio_pci bochs_drm virtio_ring drm_kms_helper syscopyarea
sysfillrect sysimgblt fb_sys_fops virtio ttm serio_raw drm floppy sg
[ 588.966206] CPU: 2 PID: 2479 Comm: kworker/u8:7 Tainted: G W 4.7.3-3-default-fdm+ #1
[ 588.966207] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.9.1-0-gb3ef39f-prebuilt.qemu-project.org 04/01/2014
[ 588.966217] Workqueue: btrfs-extent-refs btrfs_extent_refs_helper [btrfs]
[ 588.966217] 0000000000000000 ffff8802263bfc98 ffffffff813af542 ffff8802263bfce8
[ 588.966219] 0000000000000000 ffff8802263bfcd8 ffffffff81081e8b 00000b96345ee000
[ 588.966220] ffffffffa021ae1c ffff880215703b48 00000000000005fe ffff8802345ee000
[ 588.966221] Call Trace:
[ 588.966223] [<ffffffff813af542>] dump_stack+0x63/0x81
[ 588.966224] [<ffffffff81081e8b>] __warn+0xcb/0xf0
[ 588.966225] [<ffffffff81081eff>] warn_slowpath_fmt+0x4f/0x60
[ 588.966233] [<ffffffffa017e93c>] btrfs_run_delayed_refs+0x28c/0x2c0 [btrfs]
[ 588.966241] [<ffffffffa017ea04>] delayed_ref_async_start+0x94/0xb0 [btrfs]
[ 588.966250] [<ffffffffa01c799a>] btrfs_scrubparity_helper+0xca/0x350 [btrfs]
[ 588.966259] [<ffffffffa01c7c5e>] btrfs_extent_refs_helper+0xe/0x10 [btrfs]
[ 588.966260] [<ffffffff8109b323>] process_one_work+0x1f3/0x4e0
[ 588.966261] [<ffffffff8109b658>] worker_thread+0x48/0x4e0
[ 588.966263] [<ffffffff8109b610>] ? process_one_work+0x4e0/0x4e0
[ 588.966264] [<ffffffff810a1659>] kthread+0xc9/0xe0
[ 588.966265] [<ffffffff816f2f1f>] ret_from_fork+0x1f/0x40
[ 588.966267] [<ffffffff810a1590>] ? kthread_worker_fn+0x170/0x170
[ 588.966268] ---[ end trace 34e5232c933a174a ]---
[ 588.966269] BTRFS: error (device sda2) in btrfs_run_delayed_refs:2966: errno=-5 IO failure
[ 588.966270] BTRFS info (device sda2): forced readonly
This was happening often on openSUSE and SLE systems using btrfs as the
root filesystem (with its default layout where multiple subvolumes are
used) where balance happens in the background triggered by a cron job and
snapshots are automatically created before/after package installations,
upgrades and removals. The issue could be triggered simply by running the
following loop on the first system boot post installation:
while true; do
zypper -n in nfs-kernel-server
zypper -n rm nfs-kernel-server
done
(If we were fast enough and made that loop before the cron job triggered
a balance operation and the balance finished)
So fix by setting the last_snapshot field of the root to the value of the
generation of its commit root. Like this btrfs_block_can_be_shared()
behaves correctly for the case where the relocation root is created during
a transaction commit and for the case where it's created before a
transaction commit.
Fixes: 6426c7ad697d (btrfs: qgroup: Fix qgroup accounting when creating snapshot)
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
commit 2a7bf53f577e49c43de4ffa7776056de26db65d9 upstream.
If a log tree has a layout like the following:
leaf N:
...
item 240 key (282 DIR_LOG_ITEM 0) itemoff 8189 itemsize 8
dir log end 1275809046
leaf N + 1:
item 0 key (282 DIR_LOG_ITEM 3936149215) itemoff 16275 itemsize 8
dir log end 18446744073709551615
...
When we pass the value 1275809046 + 1 as the parameter start_ret to the
function tree-log.c:find_dir_range() (done by replay_dir_deletes()), we
end up with path->slots[0] having the value 239 (points to the last item
of leaf N, item 240). Because the dir log item in that position has an
offset value smaller than *start_ret (1275809046 + 1) we need to move on
to the next leaf, however the logic for that is wrong since it compares
the current slot to the number of items in the leaf, which is smaller
and therefore we don't lookup for the next leaf but instead we set the
slot to point to an item that does not exist, at slot 240, and we later
operate on that slot which has unexpected content or in the worst case
can result in an invalid memory access (accessing beyond the last page
of leaf N's extent buffer).
So fix the logic that checks when we need to lookup at the next leaf
by first incrementing the slot and only after to check if that slot
is beyond the last item of the current leaf.
Signed-off-by: Robbie Ko <robbieko@synology.com>
Reviewed-by: Filipe Manana <fdmanana@suse.com>
Fixes: e02119d5a7b4 (Btrfs: Add a write ahead tree log to optimize synchronous operations)
Signed-off-by: Filipe Manana <fdmanana@suse.com>
[Modified changelog for clarity and correctness]
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
commit ec125cfb7ae2157af3dd45dd8abe823e3e233eec upstream.
While logging new directory entries, at tree-log.c:log_new_dir_dentries(),
after we call btrfs_search_forward() we get a leaf with a read lock on it,
and without unlocking that leaf we can end up calling btrfs_iget() to get
an inode pointer. The later (btrfs_iget()) can end up doing a read-only
search on the same tree again, if the inode is not in memory already, which
ends up causing a deadlock if some other task in the meanwhile started a
write search on the tree and is attempting to write lock the same leaf
that btrfs_search_forward() locked while holding write locks on upper
levels of the tree blocking the read search from btrfs_iget(). In this
scenario we get a deadlock.
So fix this by releasing the search path before calling btrfs_iget() at
tree-log.c:log_new_dir_dentries().
Example trace of such deadlock:
[ 4077.478852] kworker/u24:10 D ffff88107fc90640 0 14431 2 0x00000000
[ 4077.486752] Workqueue: btrfs-endio-write btrfs_endio_write_helper [btrfs]
[ 4077.494346] ffff880ffa56bad0 0000000000000046 0000000000009000 ffff880ffa56bfd8
[ 4077.502629] ffff880ffa56bfd8 ffff881016ce21c0 ffffffffa06ecb26 ffff88101a5d6138
[ 4077.510915] ffff880ebb5173b0 ffff880ffa56baf8 ffff880ebb517410 ffff881016ce21c0
[ 4077.519202] Call Trace:
[ 4077.528752] [<ffffffffa06ed5ed>] ? btrfs_tree_lock+0xdd/0x2f0 [btrfs]
[ 4077.536049] [<ffffffff81053680>] ? wake_up_atomic_t+0x30/0x30
[ 4077.542574] [<ffffffffa068cc1f>] ? btrfs_search_slot+0x79f/0xb10 [btrfs]
[ 4077.550171] [<ffffffffa06a5073>] ? btrfs_lookup_file_extent+0x33/0x40 [btrfs]
[ 4077.558252] [<ffffffffa06c600b>] ? __btrfs_drop_extents+0x13b/0xdf0 [btrfs]
[ 4077.566140] [<ffffffffa06fc9e2>] ? add_delayed_data_ref+0xe2/0x150 [btrfs]
[ 4077.573928] [<ffffffffa06fd629>] ? btrfs_add_delayed_data_ref+0x149/0x1d0 [btrfs]
[ 4077.582399] [<ffffffffa06cf3c0>] ? __set_extent_bit+0x4c0/0x5c0 [btrfs]
[ 4077.589896] [<ffffffffa06b4a64>] ? insert_reserved_file_extent.constprop.75+0xa4/0x320 [btrfs]
[ 4077.599632] [<ffffffffa06b206d>] ? start_transaction+0x8d/0x470 [btrfs]
[ 4077.607134] [<ffffffffa06bab57>] ? btrfs_finish_ordered_io+0x2e7/0x600 [btrfs]
[ 4077.615329] [<ffffffff8104cbc2>] ? process_one_work+0x142/0x3d0
[ 4077.622043] [<ffffffff8104d729>] ? worker_thread+0x109/0x3b0
[ 4077.628459] [<ffffffff8104d620>] ? manage_workers.isra.26+0x270/0x270
[ 4077.635759] [<ffffffff81052b0f>] ? kthread+0xaf/0xc0
[ 4077.641404] [<ffffffff81052a60>] ? kthread_create_on_node+0x110/0x110
[ 4077.648696] [<ffffffff814a9ac8>] ? ret_from_fork+0x58/0x90
[ 4077.654926] [<ffffffff81052a60>] ? kthread_create_on_node+0x110/0x110
[ 4078.358087] kworker/u24:15 D ffff88107fcd0640 0 14436 2 0x00000000
[ 4078.365981] Workqueue: btrfs-endio-write btrfs_endio_write_helper [btrfs]
[ 4078.373574] ffff880ffa57fad0 0000000000000046 0000000000009000 ffff880ffa57ffd8
[ 4078.381864] ffff880ffa57ffd8 ffff88103004d0a0 ffffffffa06ecb26 ffff88101a5d6138
[ 4078.390163] ffff880fbeffc298 ffff880ffa57faf8 ffff880fbeffc2f8 ffff88103004d0a0
[ 4078.398466] Call Trace:
[ 4078.408019] [<ffffffffa06ed5ed>] ? btrfs_tree_lock+0xdd/0x2f0 [btrfs]
[ 4078.415322] [<ffffffff81053680>] ? wake_up_atomic_t+0x30/0x30
[ 4078.421844] [<ffffffffa068cc1f>] ? btrfs_search_slot+0x79f/0xb10 [btrfs]
[ 4078.429438] [<ffffffffa06a5073>] ? btrfs_lookup_file_extent+0x33/0x40 [btrfs]
[ 4078.437518] [<ffffffffa06c600b>] ? __btrfs_drop_extents+0x13b/0xdf0 [btrfs]
[ 4078.445404] [<ffffffffa06fc9e2>] ? add_delayed_data_ref+0xe2/0x150 [btrfs]
[ 4078.453194] [<ffffffffa06fd629>] ? btrfs_add_delayed_data_ref+0x149/0x1d0 [btrfs]
[ 4078.461663] [<ffffffffa06cf3c0>] ? __set_extent_bit+0x4c0/0x5c0 [btrfs]
[ 4078.469161] [<ffffffffa06b4a64>] ? insert_reserved_file_extent.constprop.75+0xa4/0x320 [btrfs]
[ 4078.478893] [<ffffffffa06b206d>] ? start_transaction+0x8d/0x470 [btrfs]
[ 4078.486388] [<ffffffffa06bab57>] ? btrfs_finish_ordered_io+0x2e7/0x600 [btrfs]
[ 4078.494561] [<ffffffff8104cbc2>] ? process_one_work+0x142/0x3d0
[ 4078.501278] [<ffffffff8104a507>] ? pwq_activate_delayed_work+0x27/0x40
[ 4078.508673] [<ffffffff8104d729>] ? worker_thread+0x109/0x3b0
[ 4078.515098] [<ffffffff8104d620>] ? manage_workers.isra.26+0x270/0x270
[ 4078.522396] [<ffffffff81052b0f>] ? kthread+0xaf/0xc0
[ 4078.528032] [<ffffffff81052a60>] ? kthread_create_on_node+0x110/0x110
[ 4078.535325] [<ffffffff814a9ac8>] ? ret_from_fork+0x58/0x90
[ 4078.541552] [<ffffffff81052a60>] ? kthread_create_on_node+0x110/0x110
[ 4079.355824] user-space-program D ffff88107fd30640 0 32020 1 0x00000000
[ 4079.363716] ffff880eae8eba10 0000000000000086 0000000000009000 ffff880eae8ebfd8
[ 4079.372003] ffff880eae8ebfd8 ffff881016c162c0 ffffffffa06ecb26 ffff88101a5d6138
[ 4079.380294] ffff880fbed4b4c8 ffff880eae8eba38 ffff880fbed4b528 ffff881016c162c0
[ 4079.388586] Call Trace:
[ 4079.398134] [<ffffffffa06ed595>] ? btrfs_tree_lock+0x85/0x2f0 [btrfs]
[ 4079.405431] [<ffffffff81053680>] ? wake_up_atomic_t+0x30/0x30
[ 4079.411955] [<ffffffffa06876fb>] ? btrfs_lock_root_node+0x2b/0x40 [btrfs]
[ 4079.419644] [<ffffffffa068ce83>] ? btrfs_search_slot+0xa03/0xb10 [btrfs]
[ 4079.427237] [<ffffffffa06aba52>] ? btrfs_buffer_uptodate+0x52/0x70 [btrfs]
[ 4079.435041] [<ffffffffa0689b60>] ? generic_bin_search.constprop.38+0x80/0x190 [btrfs]
[ 4079.443897] [<ffffffffa068ea44>] ? btrfs_insert_empty_items+0x74/0xd0 [btrfs]
[ 4079.451975] [<ffffffffa072c443>] ? copy_items+0x128/0x850 [btrfs]
[ 4079.458890] [<ffffffffa072da10>] ? btrfs_log_inode+0x629/0xbf3 [btrfs]
[ 4079.466292] [<ffffffffa06f34a1>] ? btrfs_log_inode_parent+0xc61/0xf30 [btrfs]
[ 4079.474373] [<ffffffffa06f45a9>] ? btrfs_log_dentry_safe+0x59/0x80 [btrfs]
[ 4079.482161] [<ffffffffa06c298d>] ? btrfs_sync_file+0x20d/0x330 [btrfs]
[ 4079.489558] [<ffffffff8112777c>] ? do_fsync+0x4c/0x80
[ 4079.495300] [<ffffffff81127a0a>] ? SyS_fdatasync+0xa/0x10
[ 4079.501422] [<ffffffff814a9b72>] ? system_call_fastpath+0x16/0x1b
[ 4079.508334] user-space-program D ffff88107fc30640 0 32021 1 0x00000004
[ 4079.516226] ffff880eae8efbf8 0000000000000086 0000000000009000 ffff880eae8effd8
[ 4079.524513] ffff880eae8effd8 ffff881030279610 ffffffffa06ecb26 ffff88101a5d6138
[ 4079.532802] ffff880ebb671d88 ffff880eae8efc20 ffff880ebb671de8 ffff881030279610
[ 4079.541092] Call Trace:
[ 4079.550642] [<ffffffffa06ed595>] ? btrfs_tree_lock+0x85/0x2f0 [btrfs]
[ 4079.557941] [<ffffffff81053680>] ? wake_up_atomic_t+0x30/0x30
[ 4079.564463] [<ffffffffa068cc1f>] ? btrfs_search_slot+0x79f/0xb10 [btrfs]
[ 4079.572058] [<ffffffffa06bb7d8>] ? btrfs_truncate_inode_items+0x168/0xb90 [btrfs]
[ 4079.580526] [<ffffffffa06b04be>] ? join_transaction.isra.15+0x1e/0x3a0 [btrfs]
[ 4079.588701] [<ffffffffa06b206d>] ? start_transaction+0x8d/0x470 [btrfs]
[ 4079.596196] [<ffffffffa0690ac6>] ? block_rsv_add_bytes+0x16/0x50 [btrfs]
[ 4079.603789] [<ffffffffa06bc2e9>] ? btrfs_truncate+0xe9/0x2e0 [btrfs]
[ 4079.610994] [<ffffffffa06bd00b>] ? btrfs_setattr+0x30b/0x410 [btrfs]
[ 4079.618197] [<ffffffff81117c1c>] ? notify_change+0x1dc/0x680
[ 4079.624625] [<ffffffff8123c8a4>] ? aa_path_perm+0xd4/0x160
[ 4079.630854] [<ffffffff810f4fcb>] ? do_truncate+0x5b/0x90
[ 4079.636889] [<ffffffff810f59fa>] ? do_sys_ftruncate.constprop.15+0x10a/0x160
[ 4079.644869] [<ffffffff8110d87b>] ? SyS_fcntl+0x5b/0x570
[ 4079.650805] [<ffffffff814a9b72>] ? system_call_fastpath+0x16/0x1b
[ 4080.410607] user-space-program D ffff88107fc70640 0 32028 12639 0x00000004
[ 4080.418489] ffff880eaeccbbe0 0000000000000086 0000000000009000 ffff880eaeccbfd8
[ 4080.426778] ffff880eaeccbfd8 ffff880f317ef1e0 ffffffffa06ecb26 ffff88101a5d6138
[ 4080.435067] ffff880ef7e93928 ffff880f317ef1e0 ffff880eaeccbc08 ffff880f317ef1e0
[ 4080.443353] Call Trace:
[ 4080.452920] [<ffffffffa06ed15d>] ? btrfs_tree_read_lock+0xdd/0x190 [btrfs]
[ 4080.460703] [<ffffffff81053680>] ? wake_up_atomic_t+0x30/0x30
[ 4080.467225] [<ffffffffa06876bb>] ? btrfs_read_lock_root_node+0x2b/0x40 [btrfs]
[ 4080.475400] [<ffffffffa068cc81>] ? btrfs_search_slot+0x801/0xb10 [btrfs]
[ 4080.482994] [<ffffffffa06b2df0>] ? btrfs_clean_one_deleted_snapshot+0xe0/0xe0 [btrfs]
[ 4080.491857] [<ffffffffa06a70a6>] ? btrfs_lookup_inode+0x26/0x90 [btrfs]
[ 4080.499353] [<ffffffff810ec42f>] ? kmem_cache_alloc+0xaf/0xc0
[ 4080.505879] [<ffffffffa06bd905>] ? btrfs_iget+0xd5/0x5d0 [btrfs]
[ 4080.512696] [<ffffffffa06caf04>] ? btrfs_get_token_64+0x104/0x120 [btrfs]
[ 4080.520387] [<ffffffffa06f341f>] ? btrfs_log_inode_parent+0xbdf/0xf30 [btrfs]
[ 4080.528469] [<ffffffffa06f45a9>] ? btrfs_log_dentry_safe+0x59/0x80 [btrfs]
[ 4080.536258] [<ffffffffa06c298d>] ? btrfs_sync_file+0x20d/0x330 [btrfs]
[ 4080.543657] [<ffffffff8112777c>] ? do_fsync+0x4c/0x80
[ 4080.549399] [<ffffffff81127a0a>] ? SyS_fdatasync+0xa/0x10
[ 4080.555534] [<ffffffff814a9b72>] ? system_call_fastpath+0x16/0x1b
Signed-off-by: Robbie Ko <robbieko@synology.com>
Reviewed-by: Filipe Manana <fdmanana@suse.com>
Fixes: 2f2ff0ee5e43 (Btrfs: fix metadata inconsistencies after directory fsync)
Signed-off-by: Filipe Manana <fdmanana@suse.com>
[Modified changelog for clarity and correctness]
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
commit ef85b25e982b5bba1530b936e283ef129f02ab9d upstream.
This can only happen with CONFIG_BTRFS_FS_CHECK_INTEGRITY=y.
Commit 1ba98d0 ("Btrfs: detect corruption when non-root leaf has zero item")
assumes that a leaf is its root when leaf->bytenr == btrfs_root_bytenr(root),
however, we should not use btrfs_root_bytenr(root) since it's mainly got
updated during committing transaction. So the check can fail when doing
COW on this leaf while it is a root.
This changes to use "if (leaf == btrfs_root_node(root))" instead, just like
how we check whether leaf is a root in __btrfs_cow_block().
Fixes: 1ba98d086fe3 (Btrfs: detect corruption when non-root leaf has zero item)
Reported-by: Jeff Mahoney <jeffm@suse.com>
Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Reviewed-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
commit 2939e1a86f758b55cdba73e29397dd3d94df13bc upstream.
Problem statement: unprivileged user who has read-write access to more than
one btrfs subvolume may easily consume all kernel memory (eventually
triggering oom-killer).
Reproducer (./mkrmdir below essentially loops over mkdir/rmdir):
[root@kteam1 ~]# cat prep.sh
DEV=/dev/sdb
mkfs.btrfs -f $DEV
mount $DEV /mnt
for i in `seq 1 16`
do
mkdir /mnt/$i
btrfs subvolume create /mnt/SV_$i
ID=`btrfs subvolume list /mnt |grep "SV_$i$" |cut -d ' ' -f 2`
mount -t btrfs -o subvolid=$ID $DEV /mnt/$i
chmod a+rwx /mnt/$i
done
[root@kteam1 ~]# sh prep.sh
[maxim@kteam1 ~]$ for i in `seq 1 16`; do ./mkrmdir /mnt/$i 2000 2000 & done
[root@kteam1 ~]# for i in `seq 1 4`; do grep "kmalloc-128" /proc/slabinfo | grep -v dma; sleep 60; done
kmalloc-128 10144 10144 128 32 1 : tunables 0 0 0 : slabdata 317 317 0
kmalloc-128 9992352 9992352 128 32 1 : tunables 0 0 0 : slabdata 312261 312261 0
kmalloc-128 24226752 24226752 128 32 1 : tunables 0 0 0 : slabdata 757086 757086 0
kmalloc-128 42754240 42754240 128 32 1 : tunables 0 0 0 : slabdata 1336070 1336070 0
The huge numbers above come from insane number of async_work-s allocated
and queued by btrfs_wq_run_delayed_node.
The problem is caused by btrfs_wq_run_delayed_node() queuing more and more
works if the number of delayed items is above BTRFS_DELAYED_BACKGROUND. The
worker func (btrfs_async_run_delayed_root) processes at least
BTRFS_DELAYED_BATCH items (if they are present in the list). So, the machinery
works as expected while the list is almost empty. As soon as it is getting
bigger, worker func starts to process more than one item at a time, it takes
longer, and the chances to have async_works queued more than needed is getting
higher.
The problem above is worsened by another flaw of delayed-inode implementation:
if async_work was queued in a throttling branch (number of items >=
BTRFS_DELAYED_WRITEBACK), corresponding worker func won't quit until
the number of items < BTRFS_DELAYED_BACKGROUND / 2. So, it is possible that
the func occupies CPU infinitely (up to 30sec in my experiments): while the
func is trying to drain the list, the user activity may add more and more
items to the list.
The patch fixes both problems in straightforward way: refuse queuing too
many works in btrfs_wq_run_delayed_node and bail out of worker func if
at least BTRFS_DELAYED_WRITEBACK items are processed.
Changed in v2: remove support of thresh == NO_THRESHOLD.
Signed-off-by: Maxim Patlasov <mpatlasov@virtuozzo.com>
Signed-off-by: Chris Mason <clm@fb.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
commit 0b34c261e235a5c74dcf78bd305845bd15fe2b42 upstream.
While free'ing qgroup->reserved resources, we much check if
the page has not been invalidated by a truncate operation
by checking if the page is still dirty before reducing the
qgroup resources. Resources in such a case are free'd when
the entire extent is released by delayed_ref.
This fixes a double accounting while releasing resources
in case of truncating a file, reproduced by the following testcase.
SCRATCH_DEV=/dev/vdb
SCRATCH_MNT=/mnt
mkfs.btrfs -f $SCRATCH_DEV
mount -t btrfs $SCRATCH_DEV $SCRATCH_MNT
cd $SCRATCH_MNT
btrfs quota enable $SCRATCH_MNT
btrfs subvolume create a
btrfs qgroup limit 500m a $SCRATCH_MNT
sync
for c in {1..15}; do
dd if=/dev/zero bs=1M count=40 of=$SCRATCH_MNT/a/file;
done
sleep 10
sync
sleep 5
touch $SCRATCH_MNT/a/newfile
echo "Removing file"
rm $SCRATCH_MNT/a/file
Fixes: b9d0b38928 ("btrfs: Add handler for invalidate page")
Signed-off-by: Goldwyn Rodrigues <rgoldwyn@suse.com>
Reviewed-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
commit 570dd45042a7c8a7aba1ee029c5dd0f5ccf41b9b upstream.
btrfs_remove_all_log_ctxs takes a shortcut where it avoids walking the
list because it knows all of the waiters are patiently waiting for the
commit to finish.
But, there's a small race where btrfs_sync_log can remove itself from
the list if it finds a log commit is already done. Also, it uses
list_del_init() to remove itself from the list, but there's no way to
know if btrfs_remove_all_log_ctxs has already run, so we don't know for
sure if it is safe to call list_del_init().
This gets rid of all the shortcuts for btrfs_remove_all_log_ctxs(), and
just calls it with the proper locking.
This is part two of the corruption fixed by cbd60aa7cd1. I should have
done this in the first place, but convinced myself the optimizations were
safe. A 12 hour run of dbench 2048 will eventually trigger a list debug
WARN_ON for the list_del_init() in btrfs_sync_log().
Fixes: d1433debe7f4346cf9fc0dafc71c3137d2a97bc4
Reported-by: Dave Jones <davej@codemonkey.org.uk>
Signed-off-by: Chris Mason <clm@fb.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
commit 073931017b49d9458aa351605b43a7e34598caef upstream.
When file permissions are modified via chmod(2) and the user is not in
the owning group or capable of CAP_FSETID, the setgid bit is cleared in
inode_change_ok(). Setting a POSIX ACL via setxattr(2) sets the file
permissions as well as the new ACL, but doesn't clear the setgid bit in
a similar way; this allows to bypass the check in chmod(2). Fix that.
References: CVE-2016-7097
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
Signed-off-by: Juerg Haefliger <juerg.haefliger@hpe.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
commit 14155cafeadda946376260e2ad5d39a0528a332f upstream.
Fixes: 4246a0b63bd8 ("block: add a bi_error field to struct bio")
Signed-off-by: Junjie Mao <junjie.mao@enight.me>
Acked-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
commit 6675df311db87aa2107a04ef97e19420953cbace upstream.
There are two separate issues that can lead to corrupted free space
trees.
1. The free space tree bitmaps had an endianness issue on big-endian
systems which is fixed by an earlier patch in this series.
2. btrfs-progs before v4.7.3 modified filesystems without updating the
free space tree.
To catch both of these issues at once, we need to force the free space
tree to be rebuilt. To do so, add a FREE_SPACE_TREE_VALID compat_ro bit.
If the bit isn't set, we know that it was either produced by a broken
big-endian kernel or may have been corrupted by btrfs-progs.
This also provides us with a way to add rudimentary read-write support
for the free space tree to btrfs-progs: it can just clear this bit and
have the kernel rebuild the free space tree.
Tested-by: Holger Hoffstätte <holger@applied-asynchrony.com>
Tested-by: Chandan Rajendra <chandan@linux.vnet.ibm.com>
Signed-off-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
commit f8d468a15c22b954b379aa0c74914d5068448fb1 upstream.
We moved the code for creating the free space tree the first time that
it's enabled, but didn't move the clearing code along with it. This
breaks my (undocumented) intention that `mount -o
clear_cache,space_cache=v2` would clear the free space tree and then
recreate it.
Fixes: 511711af91f2 ("btrfs: don't run delayed references while we are creating the free space tree")
Tested-by: Holger Hoffstätte <holger@applied-asynchrony.com>
Tested-by: Chandan Rajendra <chandan@linux.vnet.ibm.com>
Signed-off-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
commit 2fe1d55134fce05c17ea118a2e37a4af771887bc upstream.
In convert_free_space_to_{bitmaps,extents}(), we buffer the free space
bitmaps in memory and copy them directly to/from the extent buffers with
{read,write}_extent_buffer(). The extent buffer bitmap helpers use byte
granularity, which is equivalent to a little-endian bitmap. This means
that on big-endian systems, the in-memory bitmaps will be written to
disk byte-swapped. To fix this, use byte-granularity for the bitmaps in
memory.
Fixes: a5ed91828518 ("Btrfs: implement the free space B-tree")
Tested-by: Holger Hoffstätte <holger@applied-asynchrony.com>
Tested-by: Chandan Rajendra <chandan@linux.vnet.ibm.com>
Signed-off-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
|
|
git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs
Pull btrfs fixes from Chris Mason:
"Josef fixed a problem when quotas are enabled with his latest ENOSPC
rework, and Jeff added more checks into the subvol ioctls to avoid
tripping up lookup_one_len"
* 'for-linus-4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs:
btrfs: ensure that file descriptor used with subvol ioctls is a dir
Btrfs: handle quota reserve failure properly
|
|
If the subvol/snapshot create/destroy ioctls are passed a regular file
with execute permissions set, we'll eventually Oops while trying to do
inode->i_op->lookup via lookup_one_len.
This patch ensures that the file descriptor refers to a directory.
Fixes: cb8e70901d (Btrfs: Fix subvolume creation locking rules)
Fixes: 76dda93c6a (Btrfs: add snapshot/subvolume destroy ioctl)
Cc: <stable@vger.kernel.org> #v2.6.29+
Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Signed-off-by: Chris Mason <clm@fb.com>
|
|
btrfs/022 was spitting a warning for the case that we exceed the quota. If we
fail to make our quota reservation we need to clean up our data space
reservation. Thanks,
Signed-off-by: Josef Bacik <jbacik@fb.com>
Tested-by: Jeff Mahoney <jeffm@suse.com>
Signed-off-by: Chris Mason <clm@fb.com>
|
|
git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs
Pull btrfs fixes from Chris Mason:
"I'm not proud of how long it took me to track down that one liner in
btrfs_sync_log(), but the good news is the patches I was trying to
blame for these problems were actually fine (sorry Filipe)"
* 'for-linus-4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs:
btrfs: introduce tickets_id to determine whether asynchronous metadata reclaim work makes progress
btrfs: remove root_log_ctx from ctx list before btrfs_sync_log returns
btrfs: do not decrease bytes_may_use when replaying extents
|
|
git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux into for-linus-4.8
|
|
reclaim work makes progress
In btrfs_async_reclaim_metadata_space(), we use ticket's address to
determine whether asynchronous metadata reclaim work is making progress.
ticket = list_first_entry(&space_info->tickets,
struct reserve_ticket, list);
if (last_ticket == ticket) {
flush_state++;
} else {
last_ticket = ticket;
flush_state = FLUSH_DELAYED_ITEMS_NR;
if (commit_cycles)
commit_cycles--;
}
But indeed it's wrong, we should not rely on local variable's address to
do this check, because addresses may be same. In my test environment, I
dd one 168MB file in a 256MB fs, found that for this file, every time
wait_reserve_ticket() called, local variable ticket's address is same,
For above codes, assume a previous ticket's address is addrA, last_ticket
is addrA. Btrfs_async_reclaim_metadata_space() finished this ticket and
wake up it, then another ticket is added, but with the same address addrA,
now last_ticket will be same to current ticket, then current ticket's flush
work will start from current flush_state, not initial FLUSH_DELAYED_ITEMS_NR,
which may result in some enospc issues(I have seen this in my test machine).
Signed-off-by: Wang Xiaoguang <wangxg.fnst@cn.fujitsu.com>
Reviewed-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: David Sterba <dsterba@suse.com>
|
|
We use a btrfs_log_ctx structure to pass information into the
tree log commit, and get error values out. It gets added to a per
log-transaction list which we walk when things go bad.
Commit d1433debe added an optimization to skip waiting for the log
commit, but didn't take root_log_ctx out of the list. This
patch makes sure we remove things before exiting.
Signed-off-by: Chris Mason <clm@fb.com>
Fixes: d1433debe7f4346cf9fc0dafc71c3137d2a97bc4
cc: stable@vger.kernel.org # 3.15+
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|
When replaying extents, there is no need to update bytes_may_use
in btrfs_alloc_logged_file_extent(), otherwise it'll trigger a
WARN_ON about bytes_may_use.
Fixes: ("btrfs: update btrfs_space_info's bytes_may_use timely")
Signed-off-by: Wang Xiaoguang <wangxg.fnst@cn.fujitsu.com>
Reviewed-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: David Sterba <dsterba@suse.com>
|
|
git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs
Pull btrfs fixes from Chris Mason:
"I'm still prepping a set of fixes for btrfs fsync, just nailing down a
hard to trigger memory corruption. For now, these are tested and ready."
* 'for-linus-4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs:
btrfs: fix one bug that process may endlessly wait for ticket in wait_reserve_ticket()
Btrfs: fix endless loop in balancing block groups
Btrfs: kill invalid ASSERT() in process_all_refs()
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wait_reserve_ticket()
If can_overcommit() in btrfs_calc_reclaim_metadata_size() returns true,
btrfs_async_reclaim_metadata_space() will not reclaim metadata space, just
return directly and also forget to wake up process which are waiting for
their tickets, so these processes will wait endlessly.
Fstests case generic/172 with mount option "-o compress=lzo" have revealed
this bug in my test machine. Here if we have tickets to handle, we must
handle them first.
Signed-off-by: Wang Xiaoguang <wangxg.fnst@cn.fujitsu.com>
Reviewed-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: David Sterba <dsterba@suse.com>
|
|
Qgroup function may overwrite the saved error 'err' with 0
in case quota is not enabled, and this ends up with a
endless loop in balance because we keep going back to balance
the same block group.
It really should use 'ret' instead.
Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Reviewed-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.com>
|
|
Suppose you have the following tree in snap1 on a file system mounted with -o
inode_cache so that inode numbers are recycled
└── [ 258] a
└── [ 257] b
and then you remove b, rename a to c, and then re-create b in c so you have the
following tree
└── [ 258] c
└── [ 257] b
and then you try to do an incremental send you will hit
ASSERT(pending_move == 0);
in process_all_refs(). This is because we assume that any recycling of inodes
will not have a pending change in our path, which isn't the case. This is the
case for the DELETE side, since we want to remove the old file using the old
path, but on the create side we could have a pending move and need to do the
normal pending rename dance. So remove this ASSERT() and put a comment about
why we ignore pending_move. Thanks,
Signed-off-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: David Sterba <dsterba@suse.com>
|
|
git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs
Pull btrfs fixes from Chris Mason:
"We've queued up a few different fixes in here. These range from
enospc corners to fsync and quota fixes, and a few targeted at error
handling for corrupt metadata/fuzzing"
* 'for-linus-4.8' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs:
Btrfs: fix lockdep warning on deadlock against an inode's log mutex
Btrfs: detect corruption when non-root leaf has zero item
Btrfs: check btree node's nritems
btrfs: don't create or leak aliased root while cleaning up orphans
Btrfs: fix em leak in find_first_block_group
btrfs: do not background blkdev_put()
Btrfs: clarify do_chunk_alloc()'s return value
btrfs: fix fsfreeze hang caused by delayed iputs deal
btrfs: update btrfs_space_info's bytes_may_use timely
btrfs: divide btrfs_update_reserved_bytes() into two functions
btrfs: use correct offset for reloc_inode in prealloc_file_extent_cluster()
btrfs: qgroup: Fix qgroup incorrectness caused by log replay
btrfs: relocation: Fix leaking qgroups numbers on data extents
btrfs: qgroup: Refactor btrfs_qgroup_insert_dirty_extent()
btrfs: waiting on qgroup rescan should not always be interruptible
btrfs: properly track when rescan worker is running
btrfs: flush_space: treat return value of do_chunk_alloc properly
Btrfs: add ASSERT for block group's memory leak
btrfs: backref: Fix soft lockup in __merge_refs function
Btrfs: fix memory leak of reloc_root
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|
Commit 44f714dae50a ("Btrfs: improve performance on fsync against new
inode after rename/unlink"), which landed in 4.8-rc2, introduced a
possibility for a deadlock due to double locking of an inode's log mutex
by the same task, which lockdep reports with:
[23045.433975] =============================================
[23045.434748] [ INFO: possible recursive locking detected ]
[23045.435426] 4.7.0-rc6-btrfs-next-34+ #1 Not tainted
[23045.436044] ---------------------------------------------
[23045.436044] xfs_io/3688 is trying to acquire lock:
[23045.436044] (&ei->log_mutex){+.+...}, at: [<ffffffffa038552d>] btrfs_log_inode+0x13a/0xc95 [btrfs]
[23045.436044]
but task is already holding lock:
[23045.436044] (&ei->log_mutex){+.+...}, at: [<ffffffffa038552d>] btrfs_log_inode+0x13a/0xc95 [btrfs]
[23045.436044]
other info that might help us debug this:
[23045.436044] Possible unsafe locking scenario:
[23045.436044] CPU0
[23045.436044] ----
[23045.436044] lock(&ei->log_mutex);
[23045.436044] lock(&ei->log_mutex);
[23045.436044]
*** DEADLOCK ***
[23045.436044] May be due to missing lock nesting notation
[23045.436044] 3 locks held by xfs_io/3688:
[23045.436044] #0: (&sb->s_type->i_mutex_key#15){+.+...}, at: [<ffffffffa035f2ae>] btrfs_sync_file+0x14e/0x425 [btrfs]
[23045.436044] #1: (sb_internal#2){.+.+.+}, at: [<ffffffff8118446b>] __sb_start_write+0x5f/0xb0
[23045.436044] #2: (&ei->log_mutex){+.+...}, at: [<ffffffffa038552d>] btrfs_log_inode+0x13a/0xc95 [btrfs]
[23045.436044]
stack backtrace:
[23045.436044] CPU: 4 PID: 3688 Comm: xfs_io Not tainted 4.7.0-rc6-btrfs-next-34+ #1
[23045.436044] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.9.1-0-gb3ef39f-prebuilt.qemu-project.org 04/01/2014
[23045.436044] 0000000000000000 ffff88022f5f7860 ffffffff8127074d ffffffff82a54b70
[23045.436044] ffffffff82a54b70 ffff88022f5f7920 ffffffff81092897 ffff880228015d68
[23045.436044] 0000000000000000 ffffffff82a54b70 ffffffff829c3f00 ffff880228015d68
[23045.436044] Call Trace:
[23045.436044] [<ffffffff8127074d>] dump_stack+0x67/0x90
[23045.436044] [<ffffffff81092897>] __lock_acquire+0xcbb/0xe4e
[23045.436044] [<ffffffff8109155f>] ? mark_lock+0x24/0x201
[23045.436044] [<ffffffff8109179a>] ? mark_held_locks+0x5e/0x74
[23045.436044] [<ffffffff81092de0>] lock_acquire+0x12f/0x1c3
[23045.436044] [<ffffffff81092de0>] ? lock_acquire+0x12f/0x1c3
[23045.436044] [<ffffffffa038552d>] ? btrfs_log_inode+0x13a/0xc95 [btrfs]
[23045.436044] [<ffffffffa038552d>] ? btrfs_log_inode+0x13a/0xc95 [btrfs]
[23045.436044] [<ffffffff814a51a4>] mutex_lock_nested+0x77/0x3a7
[23045.436044] [<ffffffffa038552d>] ? btrfs_log_inode+0x13a/0xc95 [btrfs]
[23045.436044] [<ffffffffa039705e>] ? btrfs_release_delayed_node+0xb/0xd [btrfs]
[23045.436044] [<ffffffffa038552d>] btrfs_log_inode+0x13a/0xc95 [btrfs]
[23045.436044] [<ffffffffa038552d>] ? btrfs_log_inode+0x13a/0xc95 [btrfs]
[23045.436044] [<ffffffff810a0ed1>] ? vprintk_emit+0x453/0x465
[23045.436044] [<ffffffffa0385a61>] btrfs_log_inode+0x66e/0xc95 [btrfs]
[23045.436044] [<ffffffffa03c084d>] log_new_dir_dentries+0x26c/0x359 [btrfs]
[23045.436044] [<ffffffffa03865aa>] btrfs_log_inode_parent+0x4a6/0x628 [btrfs]
[23045.436044] [<ffffffffa0387552>] btrfs_log_dentry_safe+0x5a/0x75 [btrfs]
[23045.436044] [<ffffffffa035f464>] btrfs_sync_file+0x304/0x425 [btrfs]
[23045.436044] [<ffffffff811acaf4>] vfs_fsync_range+0x8c/0x9e
[23045.436044] [<ffffffff811acb22>] vfs_fsync+0x1c/0x1e
[23045.436044] [<ffffffff811acc79>] do_fsync+0x31/0x4a
[23045.436044] [<ffffffff811ace99>] SyS_fsync+0x10/0x14
[23045.436044] [<ffffffff814a88e5>] entry_SYSCALL_64_fastpath+0x18/0xa8
[23045.436044] [<ffffffff8108f039>] ? trace_hardirqs_off_caller+0x3f/0xaa
An example reproducer for this is:
$ mkfs.btrfs -f /dev/sdb
$ mount /dev/sdb /mnt
$ mkdir /mnt/dir
$ touch /mnt/dir/foo
$ sync
$ mv /mnt/dir/foo /mnt/dir/bar
$ touch /mnt/dir/foo
$ xfs_io -c "fsync" /mnt/dir/bar
This is because while logging the inode of file bar we end up logging its
parent directory (since its inode has an unlink_trans field matching the
current transaction id due to the rename operation), which in turn logs
the inodes for all its new dentries, so that the new inode for the new
file named foo gets logged which in turn triggered another logging attempt
for the inode we are fsync'ing, since that inode had an old name that
corresponds to the name of the new inode.
So fix this by ensuring that when logging the inode for a new dentry that
has a name matching an old name of some other inode, we don't log again
the original inode that we are fsync'ing.
Fixes: 44f714dae50a ("Btrfs: improve performance on fsync against new inode after rename/unlink")
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Chris Mason <clm@fb.com>
|
|
Right now we treat leaf which has zero item as a valid one
because we could have an empty tree, that is, a root that is
also a leaf without any item, however, in the same case but
when the leaf is not a root, we can end up with hitting the
BUG_ON(1) in btrfs_extend_item() called by
setup_inline_extent_backref().
This makes us check the situation as a corruption if leaf is
not its own root.
Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Chris Mason <clm@fb.com>
|
|
When btree node (level = 1) has nritems which equals to zero,
we can end up with panic due to insert_ptr()'s
BUG_ON(slot > nritems);
where slot is 1 and nritems is 0, as copy_for_split() calls
insert_ptr(.., path->slots[1] + 1, ...);
A invalid value results in the whole mess, this adds the check
for btree's node nritems so that we stop reading block when
when something is wrong.
Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Chris Mason <clm@fb.com>
|
|
commit 909c3a22da3 (Btrfs: fix loading of orphan roots leading to BUG_ON)
avoids the BUG_ON but can add an aliased root to the dead_roots list or
leak the root.
Since we've already been loading roots into the radix tree, we should
use it before looking the root up on disk.
Cc: <stable@vger.kernel.org> # 4.5
Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Chris Mason <clm@fb.com>
|
|
We need to call free_extent_map() on the em we look up.
Signed-off-by: Josef Bacik <jbacik@fb.com>
Reviewed-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Chris Mason <clm@fb.com>
|
|
At the end of unmount/dev-delete, if the device exclusive open is not
actually closed, then there might be a race with another program in
the userland who is trying to open the device in exclusive mode and
it may fail for eg:
unmount /btrfs; fsck /dev/x
btrfs dev del /dev/x /btrfs; fsck /dev/x
so here background blkdev_put() is not a choice
Signed-off-by: Anand Jain <Anand.Jain@oracle.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Chris Mason <clm@fb.com>
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Jeff Mahoney
Omar Sandoval
David Sterba
Wang Xiaoguang
Filipe Manana
Josef Bacik
Anand Jain
Liu Bo
Robbie Ko
Maxim Patlasov
Goldwyn Rodrigues
Chris Mason
Jan Kara
Junjie Mao
Linus Torvalds