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Pull documentation updates from Jonathan Corbet:
"Documentation updates for 4.16.
New stuff includes refcount_t documentation, errseq documentation,
kernel-doc support for nested structure definitions, the removal of
lots of crufty kernel-doc support for unused formats, SPDX tag
documentation, the beginnings of a manual for subsystem maintainers,
and lots of fixes and updates.
As usual, some of the changesets reach outside of Documentation/ to
effect kerneldoc comment fixes. It also adds the new LICENSES
directory, of which Thomas promises I do not need to be the
maintainer"
* tag 'docs-4.16' of git://git.lwn.net/linux: (65 commits)
linux-next: docs-rst: Fix typos in kfigure.py
linux-next: DOC: HWPOISON: Fix path to debugfs in hwpoison.txt
Documentation: Fix misconversion of #if
docs: add index entry for networking/msg_zerocopy
Documentation: security/credentials.rst: explain need to sort group_list
LICENSES: Add MPL-1.1 license
LICENSES: Add the GPL 1.0 license
LICENSES: Add Linux syscall note exception
LICENSES: Add the MIT license
LICENSES: Add the BSD-3-clause "Clear" license
LICENSES: Add the BSD 3-clause "New" or "Revised" License
LICENSES: Add the BSD 2-clause "Simplified" license
LICENSES: Add the LGPL-2.1 license
LICENSES: Add the LGPL 2.0 license
LICENSES: Add the GPL 2.0 license
Documentation: Add license-rules.rst to describe how to properly identify file licenses
scripts: kernel_doc: better handle show warnings logic
fs/*/Kconfig: drop links to 404-compliant http://acl.bestbits.at
doc: md: Fix a file name to md-fault.c in fault-injection.txt
errseq: Add to documentation tree
...
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This link is replicated in most filesystems' config stanzas. Referring
to an archived version of that site is pointless as it mostly deals with
patches; user documentation is available elsewhere.
Signed-off-by: Adam Borowski <kilobyte@angband.pl>
CC: Alexander Viro <viro@zeniv.linux.org.uk>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Acked-by: Jan Kara <jack@suse.cz>
Acked-by: Dave Kleikamp <dave.kleikamp@oracle.com>
Acked-by: David Sterba <dsterba@suse.com>
Acked-by: "Yan, Zheng" <zyan@redhat.com>
Acked-by: Chao Yu <yuchao0@huawei.com>
Acked-by: Jaegeuk Kim <jaegeuk@kernel.org>
Acked-by: Steve French <smfrench@gmail.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
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Pull networking updates from David Miller:
1) Significantly shrink the core networking routing structures. Result
of http://vger.kernel.org/~davem/seoul2017_netdev_keynote.pdf
2) Add netdevsim driver for testing various offloads, from Jakub
Kicinski.
3) Support cross-chip FDB operations in DSA, from Vivien Didelot.
4) Add a 2nd listener hash table for TCP, similar to what was done for
UDP. From Martin KaFai Lau.
5) Add eBPF based queue selection to tun, from Jason Wang.
6) Lockless qdisc support, from John Fastabend.
7) SCTP stream interleave support, from Xin Long.
8) Smoother TCP receive autotuning, from Eric Dumazet.
9) Lots of erspan tunneling enhancements, from William Tu.
10) Add true function call support to BPF, from Alexei Starovoitov.
11) Add explicit support for GRO HW offloading, from Michael Chan.
12) Support extack generation in more netlink subsystems. From Alexander
Aring, Quentin Monnet, and Jakub Kicinski.
13) Add 1000BaseX, flow control, and EEE support to mvneta driver. From
Russell King.
14) Add flow table abstraction to netfilter, from Pablo Neira Ayuso.
15) Many improvements and simplifications to the NFP driver bpf JIT,
from Jakub Kicinski.
16) Support for ipv6 non-equal cost multipath routing, from Ido
Schimmel.
17) Add resource abstration to devlink, from Arkadi Sharshevsky.
18) Packet scheduler classifier shared filter block support, from Jiri
Pirko.
19) Avoid locking in act_csum, from Davide Caratti.
20) devinet_ioctl() simplifications from Al viro.
21) More TCP bpf improvements from Lawrence Brakmo.
22) Add support for onlink ipv6 route flag, similar to ipv4, from David
Ahern.
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next: (1925 commits)
tls: Add support for encryption using async offload accelerator
ip6mr: fix stale iterator
net/sched: kconfig: Remove blank help texts
openvswitch: meter: Use 64-bit arithmetic instead of 32-bit
tcp_nv: fix potential integer overflow in tcpnv_acked
r8169: fix RTL8168EP take too long to complete driver initialization.
qmi_wwan: Add support for Quectel EP06
rtnetlink: enable IFLA_IF_NETNSID for RTM_NEWLINK
ipmr: Fix ptrdiff_t print formatting
ibmvnic: Wait for device response when changing MAC
qlcnic: fix deadlock bug
tcp: release sk_frag.page in tcp_disconnect
ipv4: Get the address of interface correctly.
net_sched: gen_estimator: fix lockdep splat
net: macb: Handle HRESP error
net/mlx5e: IPoIB, Fix copy-paste bug in flow steering refactoring
ipv6: addrconf: break critical section in addrconf_verify_rtnl()
ipv6: change route cache aging logic
i40e/i40evf: Update DESC_NEEDED value to reflect larger value
bnxt_en: cleanup DIM work on device shutdown
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Signed-off-by: David S. Miller <davem@davemloft.net>
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Add injectable error types for each error-injectable function.
One motivation of error injection test is to find software flaws,
mistakes or mis-handlings of expectable errors. If we find such
flaws by the test, that is a program bug, so we need to fix it.
But if the tester miss input the error (e.g. just return success
code without processing anything), it causes unexpected behavior
even if the caller is correctly programmed to handle any errors.
That is not what we want to test by error injection.
To clarify what type of errors the caller must expect for each
injectable function, this introduces injectable error types:
- EI_ETYPE_NULL : means the function will return NULL if it
fails. No ERR_PTR, just a NULL.
- EI_ETYPE_ERRNO : means the function will return -ERRNO
if it fails.
- EI_ETYPE_ERRNO_NULL : means the function will return -ERRNO
(ERR_PTR) or NULL.
ALLOW_ERROR_INJECTION() macro is expanded to get one of
NULL, ERRNO, ERRNO_NULL to record the error type for
each function. e.g.
ALLOW_ERROR_INJECTION(open_ctree, ERRNO)
This error types are shown in debugfs as below.
====
/ # cat /sys/kernel/debug/error_injection/list
open_ctree [btrfs] ERRNO
io_ctl_init [btrfs] ERRNO
====
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Reviewed-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
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Since error-injection framework is not limited to be used
by kprobes, nor bpf. Other kernel subsystems can use it
freely for checking safeness of error-injection, e.g.
livepatch, ftrace etc.
So this separate error-injection framework from kprobes.
Some differences has been made:
- "kprobe" word is removed from any APIs/structures.
- BPF_ALLOW_ERROR_INJECTION() is renamed to
ALLOW_ERROR_INJECTION() since it is not limited for BPF too.
- CONFIG_FUNCTION_ERROR_INJECTION is the config item of this
feature. It is automatically enabled if the arch supports
error injection feature for kprobe or ftrace etc.
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Reviewed-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
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Daniel Borkmann says:
====================
pull-request: bpf-next 2017-12-18
The following pull-request contains BPF updates for your *net-next* tree.
The main changes are:
1) Allow arbitrary function calls from one BPF function to another BPF function.
As of today when writing BPF programs, __always_inline had to be used in
the BPF C programs for all functions, unnecessarily causing LLVM to inflate
code size. Handle this more naturally with support for BPF to BPF calls
such that this __always_inline restriction can be overcome. As a result,
it allows for better optimized code and finally enables to introduce core
BPF libraries in the future that can be reused out of different projects.
x86 and arm64 JIT support was added as well, from Alexei.
2) Add infrastructure for tagging functions as error injectable and allow for
BPF to return arbitrary error values when BPF is attached via kprobes on
those. This way of injecting errors generically eases testing and debugging
without having to recompile or restart the kernel. Tags for opting-in for
this facility are added with BPF_ALLOW_ERROR_INJECTION(), from Josef.
3) For BPF offload via nfp JIT, add support for bpf_xdp_adjust_head() helper
call for XDP programs. First part of this work adds handling of BPF
capabilities included in the firmware, and the later patches add support
to the nfp verifier part and JIT as well as some small optimizations,
from Jakub.
4) The bpftool now also gets support for basic cgroup BPF operations such
as attaching, detaching and listing current BPF programs. As a requirement
for the attach part, bpftool can now also load object files through
'bpftool prog load'. This reuses libbpf which we have in the kernel tree
as well. bpftool-cgroup man page is added along with it, from Roman.
5) Back then commit e87c6bc3852b ("bpf: permit multiple bpf attachments for
a single perf event") added support for attaching multiple BPF programs
to a single perf event. Given they are configured through perf's ioctl()
interface, the interface has been extended with a PERF_EVENT_IOC_QUERY_BPF
command in this work in order to return an array of one or multiple BPF
prog ids that are currently attached, from Yonghong.
6) Various minor fixes and cleanups to the bpftool's Makefile as well
as a new 'uninstall' and 'doc-uninstall' target for removing bpftool
itself or prior installed documentation related to it, from Quentin.
7) Add CONFIG_CGROUP_BPF=y to the BPF kernel selftest config file which is
required for the test_dev_cgroup test case to run, from Naresh.
8) Fix reporting of XDP prog_flags for nfp driver, from Jakub.
9) Fix libbpf's exit code from the Makefile when libelf was not found in
the system, also from Jakub.
====================
Signed-off-by: David S. Miller <davem@davemloft.net>
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This was instrumental in reproducing a space cache bug.
Signed-off-by: Josef Bacik <jbacik@fb.com>
Acked-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
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This allows us to do error injection with BPF for open_ctree.
Signed-off-by: Josef Bacik <jbacik@fb.com>
Acked-by: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux
Pull btrfs updates from David Sterba:
"Features or user visible changes:
- fallocate: implement zero range mode
- avoid losing data raid profile when deleting a device
- tree item checker: more checks for directory items and xattrs
Notable fixes:
- raid56 recovery: don't use cached stripes, that could be
potentially changed and a later RMW or recovery would lead to
corruptions or failures
- let raid56 try harder to rebuild damaged data, reading from all
stripes if necessary
- fix scrub to repair raid56 in a similar way as in the case above
Other:
- cleanups: device freeing, removed some call indirections, redundant
bio_put/_get, unused parameters, refactorings and renames
- RCU list traversal fixups
- simplify mount callchain, remove recursing back when mounting a
subvolume
- plug for fsync, may improve bio merging on multiple devices
- compression heurisic: replace heap sort with radix sort, gains some
performance
- add extent map selftests, buffered write vs dio"
* tag 'for-4.16-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux: (155 commits)
btrfs: drop devid as device_list_add() arg
btrfs: get device pointer from device_list_add()
btrfs: set the total_devices in device_list_add()
btrfs: move pr_info into device_list_add
btrfs: make btrfs_free_stale_devices() to match the path
btrfs: rename btrfs_free_stale_devices() arg to skip_dev
btrfs: make btrfs_free_stale_devices() argument optional
btrfs: make btrfs_free_stale_device() to iterate all stales
btrfs: no need to check for btrfs_fs_devices::seeding
btrfs: Use IS_ALIGNED in btrfs_truncate_block instead of opencoding it
Btrfs: noinline merge_extent_mapping
Btrfs: add WARN_ONCE to detect unexpected error from merge_extent_mapping
Btrfs: extent map selftest: dio write vs dio read
Btrfs: extent map selftest: buffered write vs dio read
Btrfs: add extent map selftests
Btrfs: move extent map specific code to extent_map.c
Btrfs: add helper for em merge logic
Btrfs: fix unexpected EEXIST from btrfs_get_extent
Btrfs: fix incorrect block_len in merge_extent_mapping
btrfs: Remove unused readahead spinlock
...
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As struct btrfs_disk_super is being passed, so it can get devid
the same way its parent does.
Signed-off-by: Anand Jain <anand.jain@oracle.com>
Reviewed-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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Instead of pointer to btrfs_fs_devices as an arg in device_list_add()
better to get pointer to btrfs_device as return value, then we have
both, pointer to btrfs_device and btrfs_fs_devices. btrfs_device is
needed to handle reappearing missing device.
Signed-off-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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There is no other parent for device_list_add() except for
btrfs_scan_one_device(), which would set btrfs_fs_devices::total_devices
if device_list_add is successful and this can be done with in
device_list_add() itself.
Signed-off-by: Anand Jain <anand.jain@oracle.com>
Reviewed-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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Commit 60999ca4b403 ("btrfs: make device scan less noisy")
adds return value 1 to device_list_add(), so that parent function can
call pr_info only when new device is added. Move the pr_info() part
into device_list_add() so that this function can be kept simple.
Signed-off-by: Anand Jain <anand.jain@oracle.com>
Reviewed-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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The btrfs_free_stale_devices() is updated to match for the given device
path and delete it. (It searches for only unmounted list of devices.)
Also drop the comment about different path being used for the same
device, since now we will have cli to clean any device that's not a
concern any more.
Signed-off-by: Anand Jain <anand.jain@oracle.com>
Reviewed-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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No functional changes.
Rename btrfs_free_stale_devices() arg to skip_dev, so that it
reflects what that arg for.
Signed-off-by: Anand Jain <anand.jain@oracle.com>
Reviewed-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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This updates btrfs_free_stale_devices() helper function to delete all
unmouted devices, when arg is NULL.
Signed-off-by: Anand Jain <anand.jain@oracle.com>
Reviewed-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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Let the list iterator iterate further and find other stale
devices and delete it. This is in preparation to add support
for user land request-able stale devices cleanup. Also rename
btrfs_free_stale_device() to btrfs_free_stale_devices().
Signed-off-by: Anand Jain <anand.jain@oracle.com>
Reviewed-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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There is no need to check for btrfs_fs_devices::seeding when we
have checked for btrfs_fs_devices::opened, because we can't sprout
without its seed FS being opened.
Signed-off-by: Anand Jain <anand.jain@oracle.com>
Reviewed-by: Josef Bacik <jbacik@fb.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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No functional changes, just makes the code more readable
Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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In order to debug subtle bugs around merge_extent_mapping(), perf probe
can be used to check the arguments, but sometimes merge_extent_mapping()
got inlined by compiler and couldn't be probed.
This is adding noinline attribute to merge_extent_mapping().
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>
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This is a subtle case, so in order to understand the problem, it'd be good
to know the content of existing and em when any error occurs.
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>
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This test case simulates the racy situation of dio write vs dio read,
and see if btrfs_get_extent() would return -EEXIST.
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>
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This test case simulates the racy situation of buffered write vs dio
read, and see if btrfs_get_extent() would return -EEXIST.
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>
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We've observed that btrfs_get_extent() and merge_extent_mapping() could
return -EEXIST in several cases, and they are caused by some racy
condition, e.g dio read vs dio write, which makes the problem very tricky
to reproduce.
This adds extent map selftests in order to simulate those racy situations.
Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Reviewed-by: Josef Bacik <jbacik@fb.com>
[ minor string adjustments ]
Signed-off-by: David Sterba <dsterba@suse.com>
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These helpers are extent map specific, move them to extent_map.c.
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>
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This is a prepare work for the following extent map selftest, which
runs tests against em merge logic.
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>
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This fixes a corner case that is caused by a race of dio write vs dio
read/write.
Here is how the race could happen.
Suppose that no extent map has been loaded into memory yet.
There is a file extent [0, 32K), two jobs are running concurrently
against it, t1 is doing dio write to [8K, 32K) and t2 is doing dio
read from [0, 4K) or [4K, 8K).
t1 goes ahead of t2 and splits em [0, 32K) to em [0K, 8K) and [8K 32K).
------------------------------------------------------
t1 t2
btrfs_get_blocks_direct() btrfs_get_blocks_direct()
-> btrfs_get_extent() -> btrfs_get_extent()
-> lookup_extent_mapping()
-> add_extent_mapping() -> lookup_extent_mapping()
# load [0, 32K)
-> btrfs_new_extent_direct()
-> btrfs_drop_extent_cache()
# split [0, 32K) and
# drop [8K, 32K)
-> add_extent_mapping()
# add [8K, 32K)
-> add_extent_mapping()
# handle -EEXIST when adding
# [0, 32K)
------------------------------------------------------
About how t2(dio read/write) runs into -EEXIST:
a) add_extent_mapping() gets -EEXIST for adding em [0, 32k),
b) search_extent_mapping() then returns [0, 8k) as the existing em,
even though start == existing->start, em is [0, 32k) so that
extent_map_end(em) > extent_map_end(existing), i.e. 32k > 8k,
c) then it goes thru merge_extent_mapping() which tries to add a [8k, 8k)
(with a length 0) and returns -EEXIST as [8k, 32k) is already in tree,
d) so btrfs_get_extent() ends up returning -EEXIST to dio read/write,
which is confusing applications.
Here I conclude all the possible situations,
1) start < existing->start
+-----------+em+-----------+
+--prev---+ | +-------------+ |
| | | | | |
+---------+ + +---+existing++ ++
+
|
+
start
2) start == existing->start
+------------em------------+
| +-------------+ |
| | | |
+ +----existing-+ +
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+
start
3) start > existing->start && start < (existing->start + existing->len)
+------------em------------+
| +-------------+ |
| | | |
+ +----existing-+ +
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+
start
4) start >= (existing->start + existing->len)
+-----------+em+-----------+
| +-------------+ | +--next---+
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+ +---+existing++ + +---------+
+
|
+
start
As we can see, it turns out that if start is within existing em (front
inclusive), then the existing em should be returned as is, otherwise,
we try our best to merge candidate em with sibling ems to form a
larger em (in order to reduce the total number of em).
Reported-by: David Vallender <david.vallender@landmark.co.uk>
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>
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%block_len could be checked on deciding if two em are mergeable.
merge_extent_mapping() has only added the front pad if the front part
of em gets truncated, but it's possible that the end part gets
truncated.
For both compressed extent and inline extent, em->block_len is not
adjusted accordingly, and for regular extent, em->block_len always
equals to em->len, hence this sets em->block_len with em->len.
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>
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The reada_lock in struct btrfs_device was only initialised, and not
actually used. That's good because there's another lock also called
reada_lock in the btrfs_fs_info that was quite heavily used. Remove
this one.
Signed-off-by: Matthew Wilcox <mawilcox@microsoft.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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Before rbio_orig_end_io() goes to free rbio, rbio may get merged with
more bios from other rbios and rbio->bio_list becomes non-empty,
in that case, these newly merged bios don't end properly.
Once unlock_stripe() is done, rbio->bio_list will not be updated any
more and we can call bio_endio() on all queued bios.
It should only happen in error-out cases, the normal path of recover
and full stripe write have already set RBIO_RMW_LOCKED_BIT to disable
merge before doing IO, so rbio_orig_end_io() called by them doesn't
have the above issue.
Reported-by: Jérôme Carretero <cJ-ko@zougloub.eu>
Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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Since raid6 recover tries all possible combinations of failed stripes,
- when raid6 rebuild algorithm is used, i.e. raid6_datap_recov() and
raid6_2data_recov(), it may change the in-memory content of failed
stripes, if such a raid bio is cached, a later raid write rmw or recover
can steal @stripe_pages from it instead of reading from disks, such that
it carries the wrong content to do write rmw or recovery and ends up
with corruption or recovery failures.
- when raid5 rebuild algorithm is used, i.e. xor, raid bio can be cached
because the only failed stripe which contains @rbio->bio_pages gets
modified, others remain the same so that their in-memory content is
consistent with their on-disk content.
This adds a check to skip caching rbio if using raid6 recover.
Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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Bio iterated by set_bio_pages_uptodate() is raid56 internal one, so it
will never be a BIO_CLONED bio, and since this is called by end_io
functions, bio->bi_iter.bi_size is zero, we mustn't use
bio_for_each_segment() as that is a no-op if bi_size is zero.
Fixes: 6592e58c6b68e61f003a01ba29a3716e7e2e9484 ("Btrfs: fix write corruption due to bio cloning on raid5/6")
Cc: <stable@vger.kernel.org> # v4.12-rc6+
Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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There is no function named btrfs_get_inode_index_count.
Explanation for magic number index_cnt=2 in btrfs_new_inode() is
actually located in btrfs_set_inode_index_count().
So replace 'btrfs_get_inode_index_count' in the comment by
'btrfs_set_inode_index_count'.
Signed-off-by: Su Yue <suy.fnst@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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It's not used outside of extent-tree so there is no reason to not be
static.
Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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We call btrfs_free_stale_device() only when we alloc a new struct
btrfs_device (ret=1), so move it closer to where we alloc the new
device. Also drop the comments.
Signed-off-by: Anand Jain <anand.jain@oracle.com>
Reviewed-by: Josef Bacik <jbacik@fb.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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I've noticed that the updated item checker stack consumption increased
dramatically in 542f5385e20cf97447 ("btrfs: tree-checker: Add checker
for dir item")
tree-checker.c:check_leaf +552 (176 -> 728)
The array is 255 bytes long, dynamic allocation would slow down the
sanity checks so it's more reasonable to keep it on-stack. Moving the
variable to the scope of use reduces the stack usage again
tree-checker.c:check_leaf -264 (728 -> 464)
Reviewed-by: Josef Bacik <jbacik@fb.com>
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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gcc-8 reports:
fs/btrfs/ioctl.c: In function 'btrfs_ioctl':
./include/linux/string.h:245:9: warning: '__builtin_strncpy' specified
bound 1024 equals destination size [-Wstringop-truncation]
We need one less byte or call strlcpy() to make it a nul-terminated
string. This is done on the next line anyway, but we want to avoid the
warning.
Signed-off-by: Xiongfeng Wang <xiongfeng.wang@linaro.org>
Reviewed-by: David Sterba <dsterba@suse.com>
[ update changelog ]
Signed-off-by: David Sterba <dsterba@suse.com>
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It appears from the original commit [1] that there isn't any design
specific reason not to fail the mount instead of just warning. This
patch will change it to fail.
[1]
commit 319e4d0661e5323c9f9945f0f8fb5905e5fe74c3
btrfs: Enhance super validation check
Fixes: 319e4d0661e5323 ("btrfs: Enhance super validation check")
Signed-off-by: Anand Jain <anand.jain@oracle.com>
Reviewed-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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btrfs-progs uses super flag bit BTRFS_SUPER_FLAG_METADUMP_V2 (1ULL << 34).
So just define that in kernel so that we know its been used.
Signed-off-by: Anand Jain <anand.jain@oracle.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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We've avoided data losing raid profile when doing balance, but it
turns out that deleting a device could also result in the same
problem.
Say we have 3 disks, and they're created with '-d raid1' profile.
- We have chunk P (the only data chunk on the empty btrfs).
- Suppose that chunk P's two raid1 copies reside in disk A and disk B.
- Now, 'btrfs device remove disk B'
btrfs_rm_device()
-> btrfs_shrink_device()
-> btrfs_relocate_chunk() #relocate any chunk on disk B
to other places.
- Chunk P will be removed and a new chunk will be created to hold
those data, but as chunk P is the only one holding raid1 profile,
after it goes away, the new chunk will be created as single profile
which is our default profile.
This fixes the problem by creating an empty data chunk before
relocating the data chunk.
Metadata/System chunk are supposed to have non-zero bytes all the time
so their raid profile is preserved.
Reported-by: James Alandt <James.Alandt@wdc.com>
Signed-off-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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If we do a buffered write after a zero range operation that has an
unaligned (with the filesystem's sector size) end which also falls within
an unwritten (prealloc) extent that is currently beyond the inode's
i_size, and the zero range operation has the flag FALLOC_FL_KEEP_SIZE,
we end up leaking data and metadata space. This happens because when
zeroing a range we call btrfs_truncate_block(), which does delalloc
(loads the page and partially zeroes its content), and in the buffered
write path we only clear existing delalloc space reservation for the
range we are writing into if that range starts at an offset smaller then
the inode's i_size, which makes sense since we can not have delalloc
extents beyond the i_size, only unwritten extents are allowed.
Example reproducer:
$ mkfs.btrfs -f /dev/sdb
$ mount /dev/sdb /mnt
$ xfs_io -f -c "falloc -k 428K 4K" /mnt/foobar
$ xfs_io -c "fzero -k 0 430K" /mnt/foobar
$ xfs_io -c "pwrite -S 0xaa 428K 4K" /mnt/foobar
$ umount /mnt
After the unmount we get the metadata and data space leaks reported in
dmesg/syslog:
[95794.602253] ------------[ cut here ]------------
[95794.603322] WARNING: CPU: 0 PID: 31496 at fs/btrfs/inode.c:9561 btrfs_destroy_inode+0x4e/0x206 [btrfs]
[95794.605167] Modules linked in: btrfs xfs ppdev ghash_clmulni_intel pcbc aesni_intel aes_x86_64 crypto_simd cryptd glue_helper parport_pc psmouse sg i2c_piix4 parport i2c_core evdev pcspkr button serio_raw sunrpc loop autofs4 ext4 crc16 mbcache jbd2 zstd_decompress zstd_compress xxhash raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq libcrc32c crc32c_generic raid1 raid0 multipath linear md_mod sd_mod virtio_scsi ata_generic crc32c_intel ata_piix floppy virtio_pci virtio_ring virtio libata scsi_mod e1000 [last unloaded: btrfs]
[95794.613000] CPU: 0 PID: 31496 Comm: umount Tainted: G W 4.14.0-rc6-btrfs-next-54+ #1
[95794.614448] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.10.2-0-g5f4c7b1-prebuilt.qemu-project.org 04/01/2014
[95794.615972] task: ffff880075aa0240 task.stack: ffffc90001734000
[95794.617114] RIP: 0010:btrfs_destroy_inode+0x4e/0x206 [btrfs]
[95794.618001] RSP: 0018:ffffc90001737d00 EFLAGS: 00010202
[95794.618721] RAX: 0000000000000000 RBX: ffff880070fa1418 RCX: ffffc90001737c7c
[95794.619645] RDX: 0000000175aa0240 RSI: 0000000000000001 RDI: ffff880070fa1418
[95794.620711] RBP: ffffc90001737d38 R08: 0000000000000000 R09: 0000000000000000
[95794.621932] R10: ffffc90001737c48 R11: ffff88007123e158 R12: ffff880075b6a000
[95794.623124] R13: ffff88006145c000 R14: ffff880070fa1418 R15: ffff880070c3b4a0
[95794.624188] FS: 00007fa6793c92c0(0000) GS:ffff88023fc00000(0000) knlGS:0000000000000000
[95794.625578] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[95794.626522] CR2: 000056338670d048 CR3: 00000000610dc005 CR4: 00000000001606f0
[95794.627647] Call Trace:
[95794.628128] destroy_inode+0x3d/0x55
[95794.628573] evict+0x177/0x17e
[95794.629010] dispose_list+0x50/0x71
[95794.629478] evict_inodes+0x132/0x141
[95794.630289] generic_shutdown_super+0x3f/0x10b
[95794.630864] kill_anon_super+0x12/0x1c
[95794.631383] btrfs_kill_super+0x16/0x21 [btrfs]
[95794.631930] deactivate_locked_super+0x30/0x68
[95794.632539] deactivate_super+0x36/0x39
[95794.633200] cleanup_mnt+0x49/0x67
[95794.633818] __cleanup_mnt+0x12/0x14
[95794.634416] task_work_run+0x82/0xa6
[95794.634902] prepare_exit_to_usermode+0xe1/0x10c
[95794.635525] syscall_return_slowpath+0x18c/0x1af
[95794.636122] entry_SYSCALL_64_fastpath+0xab/0xad
[95794.636834] RIP: 0033:0x7fa678cb99a7
[95794.637370] RSP: 002b:00007ffccf0aaed8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
[95794.638672] RAX: 0000000000000000 RBX: 0000563386706030 RCX: 00007fa678cb99a7
[95794.639596] RDX: 0000000000000001 RSI: 0000000000000000 RDI: 000056338670ca90
[95794.640703] RBP: 000056338670ca90 R08: 000056338670c740 R09: 0000000000000015
[95794.641773] R10: 00000000000006b4 R11: 0000000000000246 R12: 00007fa6791bae64
[95794.643150] R13: 0000000000000000 R14: 0000563386706210 R15: 00007ffccf0ab160
[95794.644249] Code: ff 4c 8b a8 80 06 00 00 48 8b 87 c0 01 00 00 48 85 c0 74 02 0f ff 48 83 bb e0 02 00 00 00 74 02 0f ff 83 bb 3c ff ff ff 00 74 02 <0f> ff 83 bb 40 ff ff ff 00 74 02 0f ff 48 83 bb f8 fe ff ff 00
[95794.646929] ---[ end trace e95877675c6ec007 ]---
[95794.647751] ------------[ cut here ]------------
[95794.648509] WARNING: CPU: 0 PID: 31496 at fs/btrfs/inode.c:9562 btrfs_destroy_inode+0x59/0x206 [btrfs]
[95794.649842] Modules linked in: btrfs xfs ppdev ghash_clmulni_intel pcbc aesni_intel aes_x86_64 crypto_simd cryptd glue_helper parport_pc psmouse sg i2c_piix4 parport i2c_core evdev pcspkr button serio_raw sunrpc loop autofs4 ext4 crc16 mbcache jbd2 zstd_decompress zstd_compress xxhash raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq libcrc32c crc32c_generic raid1 raid0 multipath linear md_mod sd_mod virtio_scsi ata_generic crc32c_intel ata_piix floppy virtio_pci virtio_ring virtio libata scsi_mod e1000 [last unloaded: btrfs]
[95794.654659] CPU: 0 PID: 31496 Comm: umount Tainted: G W 4.14.0-rc6-btrfs-next-54+ #1
[95794.655894] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.10.2-0-g5f4c7b1-prebuilt.qemu-project.org 04/01/2014
[95794.657546] task: ffff880075aa0240 task.stack: ffffc90001734000
[95794.658433] RIP: 0010:btrfs_destroy_inode+0x59/0x206 [btrfs]
[95794.659279] RSP: 0018:ffffc90001737d00 EFLAGS: 00010202
[95794.660054] RAX: 0000000000000000 RBX: ffff880070fa1418 RCX: ffffc90001737c7c
[95794.660753] RDX: 0000000175aa0240 RSI: 0000000000000001 RDI: ffff880070fa1418
[95794.661513] RBP: ffffc90001737d38 R08: 0000000000000000 R09: 0000000000000000
[95794.662289] R10: ffffc90001737c48 R11: ffff88007123e158 R12: ffff880075b6a000
[95794.663393] R13: ffff88006145c000 R14: ffff880070fa1418 R15: ffff880070c3b4a0
[95794.664342] FS: 00007fa6793c92c0(0000) GS:ffff88023fc00000(0000) knlGS:0000000000000000
[95794.665673] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[95794.666593] CR2: 000056338670d048 CR3: 00000000610dc005 CR4: 00000000001606f0
[95794.667629] Call Trace:
[95794.668065] destroy_inode+0x3d/0x55
[95794.668637] evict+0x177/0x17e
[95794.669179] dispose_list+0x50/0x71
[95794.669830] evict_inodes+0x132/0x141
[95794.670416] generic_shutdown_super+0x3f/0x10b
[95794.671103] kill_anon_super+0x12/0x1c
[95794.671786] btrfs_kill_super+0x16/0x21 [btrfs]
[95794.672552] deactivate_locked_super+0x30/0x68
[95794.673393] deactivate_super+0x36/0x39
[95794.674107] cleanup_mnt+0x49/0x67
[95794.674706] __cleanup_mnt+0x12/0x14
[95794.675279] task_work_run+0x82/0xa6
[95794.675795] prepare_exit_to_usermode+0xe1/0x10c
[95794.676507] syscall_return_slowpath+0x18c/0x1af
[95794.677275] entry_SYSCALL_64_fastpath+0xab/0xad
[95794.678006] RIP: 0033:0x7fa678cb99a7
[95794.678600] RSP: 002b:00007ffccf0aaed8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
[95794.679739] RAX: 0000000000000000 RBX: 0000563386706030 RCX: 00007fa678cb99a7
[95794.680779] RDX: 0000000000000001 RSI: 0000000000000000 RDI: 000056338670ca90
[95794.681837] RBP: 000056338670ca90 R08: 000056338670c740 R09: 0000000000000015
[95794.682867] R10: 00000000000006b4 R11: 0000000000000246 R12: 00007fa6791bae64
[95794.683891] R13: 0000000000000000 R14: 0000563386706210 R15: 00007ffccf0ab160
[95794.684843] Code: c0 01 00 00 48 85 c0 74 02 0f ff 48 83 bb e0 02 00 00 00 74 02 0f ff 83 bb 3c ff ff ff 00 74 02 0f ff 83 bb 40 ff ff ff 00 74 02 <0f> ff 48 83 bb f8 fe ff ff 00 74 02 0f ff 48 83 bb 00 ff ff ff
[95794.687156] ---[ end trace e95877675c6ec008 ]---
[95794.687876] ------------[ cut here ]------------
[95794.688579] WARNING: CPU: 0 PID: 31496 at fs/btrfs/inode.c:9565 btrfs_destroy_inode+0x7d/0x206 [btrfs]
[95794.689735] Modules linked in: btrfs xfs ppdev ghash_clmulni_intel pcbc aesni_intel aes_x86_64 crypto_simd cryptd glue_helper parport_pc psmouse sg i2c_piix4 parport i2c_core evdev pcspkr button serio_raw sunrpc loop autofs4 ext4 crc16 mbcache jbd2 zstd_decompress zstd_compress xxhash raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq libcrc32c crc32c_generic raid1 raid0 multipath linear md_mod sd_mod virtio_scsi ata_generic crc32c_intel ata_piix floppy virtio_pci virtio_ring virtio libata scsi_mod e1000 [last unloaded: btrfs]
[95794.695015] CPU: 0 PID: 31496 Comm: umount Tainted: G W 4.14.0-rc6-btrfs-next-54+ #1
[95794.696396] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.10.2-0-g5f4c7b1-prebuilt.qemu-project.org 04/01/2014
[95794.697956] task: ffff880075aa0240 task.stack: ffffc90001734000
[95794.698925] RIP: 0010:btrfs_destroy_inode+0x7d/0x206 [btrfs]
[95794.699763] RSP: 0018:ffffc90001737d00 EFLAGS: 00010206
[95794.700434] RAX: 0000000000000000 RBX: ffff880070fa1418 RCX: ffffc90001737c7c
[95794.701445] RDX: 0000000175aa0240 RSI: 0000000000000001 RDI: ffff880070fa1418
[95794.702448] RBP: ffffc90001737d38 R08: 0000000000000000 R09: 0000000000000000
[95794.703557] R10: ffffc90001737c48 R11: ffff88007123e158 R12: ffff880075b6a000
[95794.704441] R13: ffff88006145c000 R14: ffff880070fa1418 R15: ffff880070c3b4a0
[95794.705270] FS: 00007fa6793c92c0(0000) GS:ffff88023fc00000(0000) knlGS:0000000000000000
[95794.706341] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[95794.707001] CR2: 000056338670d048 CR3: 00000000610dc005 CR4: 00000000001606f0
[95794.708030] Call Trace:
[95794.708466] destroy_inode+0x3d/0x55
[95794.709071] evict+0x177/0x17e
[95794.709497] dispose_list+0x50/0x71
[95794.709973] evict_inodes+0x132/0x141
[95794.710564] generic_shutdown_super+0x3f/0x10b
[95794.711200] kill_anon_super+0x12/0x1c
[95794.711633] btrfs_kill_super+0x16/0x21 [btrfs]
[95794.712139] deactivate_locked_super+0x30/0x68
[95794.712608] deactivate_super+0x36/0x39
[95794.713093] cleanup_mnt+0x49/0x67
[95794.713514] __cleanup_mnt+0x12/0x14
[95794.713933] task_work_run+0x82/0xa6
[95794.714543] prepare_exit_to_usermode+0xe1/0x10c
[95794.715247] syscall_return_slowpath+0x18c/0x1af
[95794.715952] entry_SYSCALL_64_fastpath+0xab/0xad
[95794.716653] RIP: 0033:0x7fa678cb99a7
[95794.721100] RSP: 002b:00007ffccf0aaed8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
[95794.722052] RAX: 0000000000000000 RBX: 0000563386706030 RCX: 00007fa678cb99a7
[95794.722856] RDX: 0000000000000001 RSI: 0000000000000000 RDI: 000056338670ca90
[95794.723698] RBP: 000056338670ca90 R08: 000056338670c740 R09: 0000000000000015
[95794.724736] R10: 00000000000006b4 R11: 0000000000000246 R12: 00007fa6791bae64
[95794.725928] R13: 0000000000000000 R14: 0000563386706210 R15: 00007ffccf0ab160
[95794.726728] Code: 40 ff ff ff 00 74 02 0f ff 48 83 bb f8 fe ff ff 00 74 02 0f ff 48 83 bb 00 ff ff ff 00 74 02 0f ff 48 83 bb 30 ff ff ff 00 74 02 <0f> ff 48 83 bb 08 ff ff ff 00 74 02 0f ff 4d 85 e4 0f 84 52 01
[95794.729203] ---[ end trace e95877675c6ec009 ]---
[95794.841054] ------------[ cut here ]------------
[95794.841829] WARNING: CPU: 0 PID: 31496 at fs/btrfs/extent-tree.c:5831 btrfs_free_block_groups+0x235/0x36a [btrfs]
[95794.843425] Modules linked in: btrfs xfs ppdev ghash_clmulni_intel pcbc aesni_intel aes_x86_64 crypto_simd cryptd glue_helper parport_pc psmouse sg i2c_piix4 parport i2c_core evdev pcspkr button serio_raw sunrpc loop autofs4 ext4 crc16 mbcache jbd2 zstd_decompress zstd_compress xxhash raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq libcrc32c crc32c_generic raid1 raid0 multipath linear md_mod sd_mod virtio_scsi ata_generic crc32c_intel ata_piix floppy virtio_pci virtio_ring virtio libata scsi_mod e1000 [last unloaded: btrfs]
[95794.850658] CPU: 0 PID: 31496 Comm: umount Tainted: G W 4.14.0-rc6-btrfs-next-54+ #1
[95794.852590] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.10.2-0-g5f4c7b1-prebuilt.qemu-project.org 04/01/2014
[95794.854752] task: ffff880075aa0240 task.stack: ffffc90001734000
[95794.855812] RIP: 0010:btrfs_free_block_groups+0x235/0x36a [btrfs]
[95794.856811] RSP: 0018:ffffc90001737d70 EFLAGS: 00010206
[95794.857805] RAX: 0000000080000000 RBX: ffff88006145c000 RCX: 0000000000000001
[95794.859014] RDX: 00000001810af668 RSI: 0000000000000002 RDI: 00000000ffffffff
[95794.860270] RBP: ffffc90001737d98 R08: 0000000000000000 R09: ffffffff817e22b9
[95794.861525] R10: ffffc90001737c80 R11: 00000000000337fd R12: 0000000000000000
[95794.862700] R13: ffff88006145c0c0 R14: ffff88021b61a800 R15: ffff88006145c100
[95794.863810] FS: 00007fa6793c92c0(0000) GS:ffff88023fc00000(0000) knlGS:0000000000000000
[95794.865149] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[95794.866099] CR2: 000056338670d048 CR3: 00000000610dc005 CR4: 00000000001606f0
[95794.867198] Call Trace:
[95794.867626] close_ctree+0x1db/0x2b8 [btrfs]
[95794.868188] ? evict_inodes+0x132/0x141
[95794.869037] btrfs_put_super+0x15/0x17 [btrfs]
[95794.870400] generic_shutdown_super+0x6a/0x10b
[95794.871262] kill_anon_super+0x12/0x1c
[95794.872046] btrfs_kill_super+0x16/0x21 [btrfs]
[95794.872746] deactivate_locked_super+0x30/0x68
[95794.873687] deactivate_super+0x36/0x39
[95794.874639] cleanup_mnt+0x49/0x67
[95794.875504] __cleanup_mnt+0x12/0x14
[95794.876126] task_work_run+0x82/0xa6
[95794.876788] prepare_exit_to_usermode+0xe1/0x10c
[95794.877777] syscall_return_slowpath+0x18c/0x1af
[95794.878381] entry_SYSCALL_64_fastpath+0xab/0xad
[95794.878888] RIP: 0033:0x7fa678cb99a7
[95794.879307] RSP: 002b:00007ffccf0aaed8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
[95794.880204] RAX: 0000000000000000 RBX: 0000563386706030 RCX: 00007fa678cb99a7
[95794.881640] RDX: 0000000000000001 RSI: 0000000000000000 RDI: 000056338670ca90
[95794.882690] RBP: 000056338670ca90 R08: 000056338670c740 R09: 0000000000000015
[95794.883538] R10: 00000000000006b4 R11: 0000000000000246 R12: 00007fa6791bae64
[95794.884562] R13: 0000000000000000 R14: 0000563386706210 R15: 00007ffccf0ab160
[95794.885664] Code: 89 ef e8 07 ec 32 e1 e8 9d c0 ea e0 48 8d b3 28 02 00 00 48 83 c9 ff 31 d2 48 89 df e8 29 c5 ff ff 48 83 bb 80 02 00 00 00 74 02 <0f> ff 48 83 bb 88 02 00 00 00 74 02 0f ff 48 83 bb d8 02 00 00
[95794.887980] ---[ end trace e95877675c6ec00a ]---
[95794.888739] ------------[ cut here ]------------
[95794.889405] WARNING: CPU: 0 PID: 31496 at fs/btrfs/extent-tree.c:5832 btrfs_free_block_groups+0x241/0x36a [btrfs]
[95794.891020] Modules linked in: btrfs xfs ppdev ghash_clmulni_intel pcbc aesni_intel aes_x86_64 crypto_simd cryptd glue_helper parport_pc psmouse sg i2c_piix4 parport i2c_core evdev pcspkr button serio_raw sunrpc loop autofs4 ext4 crc16 mbcache jbd2 zstd_decompress zstd_compress xxhash raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq libcrc32c crc32c_generic raid1 raid0 multipath linear md_mod sd_mod virtio_scsi ata_generic crc32c_intel ata_piix floppy virtio_pci virtio_ring virtio libata scsi_mod e1000 [last unloaded: btrfs]
[95794.897551] CPU: 0 PID: 31496 Comm: umount Tainted: G W 4.14.0-rc6-btrfs-next-54+ #1
[95794.898509] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.10.2-0-g5f4c7b1-prebuilt.qemu-project.org 04/01/2014
[95794.899685] task: ffff880075aa0240 task.stack: ffffc90001734000
[95794.900592] RIP: 0010:btrfs_free_block_groups+0x241/0x36a [btrfs]
[95794.901387] RSP: 0018:ffffc90001737d70 EFLAGS: 00010206
[95794.902300] RAX: 0000000080000000 RBX: ffff88006145c000 RCX: 0000000000000001
[95794.903260] RDX: 00000001810af668 RSI: 0000000000000002 RDI: 00000000ffffffff
[95794.904332] RBP: ffffc90001737d98 R08: 0000000000000000 R09: ffffffff817e22b9
[95794.905300] R10: ffffc90001737c80 R11: 00000000000337fd R12: 0000000000000000
[95794.906439] R13: ffff88006145c0c0 R14: ffff88021b61a800 R15: ffff88006145c100
[95794.907459] FS: 00007fa6793c92c0(0000) GS:ffff88023fc00000(0000) knlGS:0000000000000000
[95794.908625] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[95794.909511] CR2: 000056338670d048 CR3: 00000000610dc005 CR4: 00000000001606f0
[95794.910630] Call Trace:
[95794.911153] close_ctree+0x1db/0x2b8 [btrfs]
[95794.911837] ? evict_inodes+0x132/0x141
[95794.912344] btrfs_put_super+0x15/0x17 [btrfs]
[95794.912975] generic_shutdown_super+0x6a/0x10b
[95794.913788] kill_anon_super+0x12/0x1c
[95794.914424] btrfs_kill_super+0x16/0x21 [btrfs]
[95794.915142] deactivate_locked_super+0x30/0x68
[95794.915831] deactivate_super+0x36/0x39
[95794.916433] cleanup_mnt+0x49/0x67
[95794.917045] __cleanup_mnt+0x12/0x14
[95794.917665] task_work_run+0x82/0xa6
[95794.918309] prepare_exit_to_usermode+0xe1/0x10c
[95794.919021] syscall_return_slowpath+0x18c/0x1af
[95794.919722] entry_SYSCALL_64_fastpath+0xab/0xad
[95794.920426] RIP: 0033:0x7fa678cb99a7
[95794.921039] RSP: 002b:00007ffccf0aaed8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
[95794.922303] RAX: 0000000000000000 RBX: 0000563386706030 RCX: 00007fa678cb99a7
[95794.923335] RDX: 0000000000000001 RSI: 0000000000000000 RDI: 000056338670ca90
[95794.924364] RBP: 000056338670ca90 R08: 000056338670c740 R09: 0000000000000015
[95794.925435] R10: 00000000000006b4 R11: 0000000000000246 R12: 00007fa6791bae64
[95794.926533] R13: 0000000000000000 R14: 0000563386706210 R15: 00007ffccf0ab160
[95794.927557] Code: 48 8d b3 28 02 00 00 48 83 c9 ff 31 d2 48 89 df e8 29 c5 ff ff 48 83 bb 80 02 00 00 00 74 02 0f ff 48 83 bb 88 02 00 00 00 74 02 <0f> ff 48 83 bb d8 02 00 00 00 74 02 0f ff 48 83 bb e0 02 00 00
[95794.930166] ---[ end trace e95877675c6ec00b ]---
[95794.930961] ------------[ cut here ]------------
[95794.931727] WARNING: CPU: 0 PID: 31496 at fs/btrfs/extent-tree.c:9953 btrfs_free_block_groups+0x2bc/0x36a [btrfs]
[95794.932729] Modules linked in: btrfs xfs ppdev ghash_clmulni_intel pcbc aesni_intel aes_x86_64 crypto_simd cryptd glue_helper parport_pc psmouse sg i2c_piix4 parport i2c_core evdev pcspkr button serio_raw sunrpc loop autofs4 ext4 crc16 mbcache jbd2 zstd_decompress zstd_compress xxhash raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq libcrc32c crc32c_generic raid1 raid0 multipath linear md_mod sd_mod virtio_scsi ata_generic crc32c_intel ata_piix floppy virtio_pci virtio_ring virtio libata scsi_mod e1000 [last unloaded: btrfs]
[95794.938394] CPU: 0 PID: 31496 Comm: umount Tainted: G W 4.14.0-rc6-btrfs-next-54+ #1
[95794.939842] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.10.2-0-g5f4c7b1-prebuilt.qemu-project.org 04/01/2014
[95794.941455] task: ffff880075aa0240 task.stack: ffffc90001734000
[95794.942336] RIP: 0010:btrfs_free_block_groups+0x2bc/0x36a [btrfs]
[95794.943268] RSP: 0018:ffffc90001737d70 EFLAGS: 00010206
[95794.944127] RAX: ffff8802004fd0e8 RBX: ffff88006145c000 RCX: 0000000000000001
[95794.945211] RDX: 00000001810af668 RSI: 0000000000000002 RDI: 00000000ffffffff
[95794.946316] RBP: ffffc90001737d98 R08: 0000000000000000 R09: ffffffff817e22b9
[95794.947271] R10: ffffc90001737c80 R11: 00000000000337fd R12: ffff8802004fd0e8
[95794.948219] R13: ffff88006145c0c0 R14: ffff88006145e598 R15: ffff88006145c100
[95794.949193] FS: 00007fa6793c92c0(0000) GS:ffff88023fc00000(0000) knlGS:0000000000000000
[95794.950495] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[95794.951338] CR2: 000056338670d048 CR3: 00000000610dc005 CR4: 00000000001606f0
[95794.952361] Call Trace:
[95794.952811] close_ctree+0x1db/0x2b8 [btrfs]
[95794.953522] ? evict_inodes+0x132/0x141
[95794.954543] btrfs_put_super+0x15/0x17 [btrfs]
[95794.955231] generic_shutdown_super+0x6a/0x10b
[95794.955916] kill_anon_super+0x12/0x1c
[95794.956414] btrfs_kill_super+0x16/0x21 [btrfs]
[95794.956953] deactivate_locked_super+0x30/0x68
[95794.957635] deactivate_super+0x36/0x39
[95794.958256] cleanup_mnt+0x49/0x67
[95794.958701] __cleanup_mnt+0x12/0x14
[95794.959181] task_work_run+0x82/0xa6
[95794.959635] prepare_exit_to_usermode+0xe1/0x10c
[95794.960182] syscall_return_slowpath+0x18c/0x1af
[95794.960731] entry_SYSCALL_64_fastpath+0xab/0xad
[95794.961438] RIP: 0033:0x7fa678cb99a7
[95794.961990] RSP: 002b:00007ffccf0aaed8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
[95794.963111] RAX: 0000000000000000 RBX: 0000563386706030 RCX: 00007fa678cb99a7
[95794.963975] RDX: 0000000000000001 RSI: 0000000000000000 RDI: 000056338670ca90
[95794.964680] RBP: 000056338670ca90 R08: 000056338670c740 R09: 0000000000000015
[95794.965763] R10: 00000000000006b4 R11: 0000000000000246 R12: 00007fa6791bae64
[95794.966868] R13: 0000000000000000 R14: 0000563386706210 R15: 00007ffccf0ab160
[95794.967800] Code: 00 00 00 4c 8b a3 98 25 00 00 49 83 bc 24 60 ff ff ff 00 75 16 49 83 bc 24 68 ff ff ff 00 75 0b 49 83 bc 24 70 ff ff ff 00 74 16 <0f> ff 49 8d b4 24 18 ff ff ff 31 c9 31 d2 48 89 df e8 93 7a ff
[95794.970629] ---[ end trace e95877675c6ec00c ]---
[95794.971451] BTRFS info (device sdi): space_info 1 has 7680000 free, is not full
[95794.972351] BTRFS info (device sdi): space_info total=8388608, used=704512, pinned=0, reserved=0, may_use=4096, readonly=0
[95794.973595] ------------[ cut here ]------------
[95794.974353] WARNING: CPU: 0 PID: 31496 at fs/btrfs/extent-tree.c:9953 btrfs_free_block_groups+0x2bc/0x36a [btrfs]
[95794.980163] Modules linked in: btrfs xfs ppdev ghash_clmulni_intel pcbc aesni_intel aes_x86_64 crypto_simd cryptd glue_helper parport_pc psmouse sg i2c_piix4 parport i2c_core evdev pcspkr button serio_raw sunrpc loop autofs4 ext4 crc16 mbcache jbd2 zstd_decompress zstd_compress xxhash raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor async_tx xor raid6_pq libcrc32c crc32c_generic raid1 raid0 multipath linear md_mod sd_mod virtio_scsi ata_generic crc32c_intel ata_piix floppy virtio_pci virtio_ring virtio libata scsi_mod e1000 [last unloaded: btrfs]
[95794.986461] CPU: 0 PID: 31496 Comm: umount Tainted: G W 4.14.0-rc6-btrfs-next-54+ #1
[95794.987591] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.10.2-0-g5f4c7b1-prebuilt.qemu-project.org 04/01/2014
[95794.988929] task: ffff880075aa0240 task.stack: ffffc90001734000
[95794.989922] RIP: 0010:btrfs_free_block_groups+0x2bc/0x36a [btrfs]
[95794.990715] RSP: 0018:ffffc90001737d70 EFLAGS: 00010206
[95794.991431] RAX: ffff88020f6e70e8 RBX: ffff88006145c000 RCX: ffffffff8115a906
[95794.992455] RDX: ffffffff8115a902 RSI: ffff880075aa0b40 RDI: ffff880075aa0b40
[95794.993535] RBP: ffffc90001737d98 R08: 0000000000000020 R09: fffffffffffffff7
[95794.994573] R10: 00000000ffffffc4 R11: ffff8800633b1bc0 R12: ffff88020f6e70e8
[95794.996250] R13: 0000000000000038 R14: ffff88006145e598 R15: 0000000000000000
[95794.997233] FS: 00007fa6793c92c0(0000) GS:ffff88023fc00000(0000) knlGS:0000000000000000
[95794.998592] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[95794.999484] CR2: 000056338670d048 CR3: 00000000610dc005 CR4: 00000000001606f0
[95795.000542] Call Trace:
[95795.001138] close_ctree+0x1db/0x2b8 [btrfs]
[95795.001885] ? evict_inodes+0x132/0x141
[95795.002407] btrfs_put_super+0x15/0x17 [btrfs]
[95795.003093] generic_shutdown_super+0x6a/0x10b
[95795.003720] kill_anon_super+0x12/0x1c
[95795.004353] btrfs_kill_super+0x16/0x21 [btrfs]
[95795.005095] deactivate_locked_super+0x30/0x68
[95795.005716] deactivate_super+0x36/0x39
[95795.006388] cleanup_mnt+0x49/0x67
[95795.006939] __cleanup_mnt+0x12/0x14
[95795.007512] task_work_run+0x82/0xa6
[95795.008124] prepare_exit_to_usermode+0xe1/0x10c
[95795.008994] syscall_return_slowpath+0x18c/0x1af
[95795.009831] entry_SYSCALL_64_fastpath+0xab/0xad
[95795.010610] RIP: 0033:0x7fa678cb99a7
[95795.011193] RSP: 002b:00007ffccf0aaed8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6
[95795.012327] RAX: 0000000000000000 RBX: 0000563386706030 RCX: 00007fa678cb99a7
[95795.013432] RDX: 0000000000000001 RSI: 0000000000000000 RDI: 000056338670ca90
[95795.014558] RBP: 000056338670ca90 R08: 000056338670c740 R09: 0000000000000015
[95795.015577] R10: 00000000000006b4 R11: 0000000000000246 R12: 00007fa6791bae64
[95795.016569] R13: 0000000000000000 R14: 0000563386706210 R15: 00007ffccf0ab160
[95795.017662] Code: 00 00 00 4c 8b a3 98 25 00 00 49 83 bc 24 60 ff ff ff 00 75 16 49 83 bc 24 68 ff ff ff 00 75 0b 49 83 bc 24 70 ff ff ff 00 74 16 <0f> ff 49 8d b4 24 18 ff ff ff 31 c9 31 d2 48 89 df e8 93 7a ff
[95795.020538] ---[ end trace e95877675c6ec00d ]---
[95795.021259] BTRFS info (device sdi): space_info 4 has 1072775168 free, is not full
[95795.022390] BTRFS info (device sdi): space_info total=1073741824, used=114688, pinned=0, reserved=0, may_use=786432, readonly=65536
Fix this by ensuring the zero range operation does not call
btrfs_truncate_block() if the corresponding extent is an unwritten one
(it's pointless anyway, since reading from an unwritten extent yields
zeroes).
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Tested-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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For a fallocate's zero range operation that targets a range with an end
that is not aligned to the sector size, we can end up not updating the
inode's i_size. This happens when the last page of the range maps to an
unwritten (prealloc) extent and before that last page we have either a
hole or a written extent. This is because in this scenario we relied
on a call to btrfs_prealloc_file_range() to update the inode's i_size,
however it can only update the i_size to the "down aligned" end of the
range.
Example:
$ mkfs.btrfs -f /dev/sdc
$ mount /dev/sdc /mnt
$ xfs_io -f -c "pwrite -S 0xff 0 428K" /mnt/foobar
$ xfs_io -c "falloc -k 428K 4K" /mnt/foobar
$ xfs_io -c "fzero 0 430K" /mnt/foobar
$ du --bytes /mnt/foobar
438272 /mnt/foobar
The inode's i_size was left as 428Kb (438272 bytes) when it should have
been updated to 430Kb (440320 bytes).
Fix this by always updating the inode's i_size explicitly after zeroing
the range.
Fixes: ba6d5887946ff86d93dc ("Btrfs: add support for fallocate's zero range operation")
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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During a buffered IO write, we can have an extent state that we got when
we locked the range (if the range starts at an offset lower than eof), so
always pass it to btrfs_dirty_pages() so that setting the delalloc bit
in the range does not need to do a full search in the inode's io tree,
saving time and reducing the amount of time we hold the io tree's lock.
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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This implements support the zero range operation of fallocate. For now
at least it's as simple as possible while reusing most of the existing
fallocate and hole punching infrastructure.
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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Since fail stripe index in rbio would be used to decide which
algorithm reconstruction would be run, we cannot merge rbios if
their's fail striped indexes are different, otherwise, one of the two
reconstructions would fail.
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>
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Given the above
'
if (last->operation != cur->operation)
return 0;
',
it's guaranteed that two operations are same.
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>
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Assign ret = -EINVAL where it is actually required.
Remove { } around single line if else code.
Signed-off-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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No functional change rearrange the mutex_unlock.
Signed-off-by: Anand Jain <anand.jain@oracle.com>
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
[ edit subject ]
Signed-off-by: David Sterba <dsterba@suse.com>
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