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Before this patch, gfs2 would deadlock because of the following
sequence during mount:
mount
gfs2_fill_super
gfs2_make_fs_rw <--- Detects IO error with glock
kthread_stop(sdp->sd_quotad_process);
<--- Blocked waiting for quotad to finish
logd
Detects IO error and the need to withdraw
calls gfs2_withdraw
gfs2_make_fs_ro
kthread_stop(sdp->sd_quotad_process);
<--- Blocked waiting for quotad to finish
gfs2_quotad
gfs2_statfs_sync
gfs2_glock_wait <---- Blocked waiting for statfs glock to be granted
glock_work_func
do_xmote <---Detects IO error, can't release glock: blocked on withdraw
glops->go_inval
glock_blocked_by_withdraw
requeue glock work & exit <--- work requeued, blocked by withdraw
This patch makes a special exception for the statfs system inode glock,
which allows the statfs glock UNLOCK to proceed normally. That allows the
quotad daemon to exit during the withdraw, which allows the logd daemon
to exit during the withdraw, which allows the mount to exit.
Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
Before this patch, in the unlikely event that gfs2_glock_dq encountered
a withdraw, it would do a wait_on_bit to wait for its journal to be
recovered, but it never released the glock's spin_lock, which caused a
scheduling-while-atomic error.
This patch unlocks the lockref spin_lock before waiting for recovery.
Fixes: 601ef0d52e96 ("gfs2: Force withdraw to replay journals and wait for it to finish")
Cc: stable@vger.kernel.org # v5.7+
Reported-by: Alexander Aring <aahringo@redhat.com>
Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
Patch 4a378d8a0d96 added a new check for I_NEW inodes, but unfortunately
it used the wrong variable, i_flags. This caused GFS2 to withdraw when
gfs2_lookup_by_inum needed to refresh an I_NEW inode. This patch switches
to use the correct variable, i_state.
Fixes: 4a378d8a0d96 ("gfs2: be careful with inode refresh")
Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
When a direct I/O write falls entirely and falls back to buffered I/O and the
buffered I/O fails, the write failed with return value 0 instead of the error
number reported by the buffered I/O. Fix that.
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
When smb2 lease parameter is disabled on server. Server grants
batch oplock instead of RHW lease by default on open, inode page cache
needs to be zapped immediatley upon close as cache is not valid.
Signed-off-by: Rohith Surabattula <rohiths@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Removed oplock_break_received flag which was added to achieve
synchronization between oplock handler and open handler by earlier commit.
It is not needed because there is an existing lock open_file_lock to achieve
the same. find_readable_file takes open_file_lock and then traverses the
openFileList. Similarly, cifs_oplock_break while closing the deferred
handle (i.e cifsFileInfo_put) takes open_file_lock and then sends close
to the server.
Added comments for better readability.
Signed-off-by: Rohith Surabattula <rohiths@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
When using smb2_copychunk_range() for large ranges we will
run through several iterations of a loop calling SMB2_ioctl()
but never actually free the returned buffer except for the final
iteration.
This leads to memory leaks everytime a large copychunk is requested.
Fixes: 9bf0c9cd4314 ("CIFS: Fix SMB2/SMB3 Copy offload support (refcopy) for large files")
Cc: <stable@vger.kernel.org>
Reviewed-by: Aurelien Aptel <aaptel@suse.com>
Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
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Merge tag 'fs.idmapped.mount_setattr.v5.13-rc3' of gitolite.kernel.org:pub/scm/linux/kernel/git/brauner/linux
Pull mount_setattr fix from Christian Brauner:
"This makes an underlying idmapping assumption more explicit.
We currently don't have any filesystems that support idmapped mounts
which are mountable inside a user namespace, i.e. where s_user_ns !=
init_user_ns. That was a deliberate decision for now as userns root
can just mount the filesystem themselves.
Express this restriction explicitly and enforce it until there's a
real use-case for this. This way we can notice it and will have a
chance to adapt and audit our translation helpers and fstests
appropriately if we need to support such filesystems"
* tag 'fs.idmapped.mount_setattr.v5.13-rc3' of gitolite.kernel.org:pub/scm/linux/kernel/git/brauner/linux:
fs/mount_setattr: tighten permission checks
See MS-SMB2 3.2.4.1.4, file ids in compounded requests should be set to
0xFFFFFFFFFFFFFFFF (we were treating it as u32 not u64 and setting
it incorrectly).
Signed-off-by: Steve French <stfrench@microsoft.com>
Reported-by: Stefan Metzmacher <metze@samba.org>
Reviewed-by: Shyam Prasad N <sprasad@microsoft.com>
With the addition of ssi_perf_data and ssi_perf_type struct signalfd_siginfo
is dangerously close to running out of space. All that remains is just
enough space for two additional 64bit fields. A practice of adding all
possible siginfo_t fields into struct singalfd_siginfo can not be supported
as adding the missing fields ssi_lower, ssi_upper, and ssi_pkey would
require two 64bit fields and one 32bit fields. In practice the fields
ssi_perf_data and ssi_perf_type can never be used by signalfd as the signal
that generates them always delivers them synchronously to the thread that
triggers them.
Therefore until someone actually needs the fields ssi_perf_data and
ssi_perf_type in signalfd_siginfo remove them. This leaves a bit more room
for future expansion.
v1: https://lkml.kernel.org/r/20210503203814.25487-12-ebiederm@xmission.com
v2: https://lkml.kernel.org/r/20210505141101.11519-12-ebiederm@xmission.com
Link: https://lkml.kernel.org/r/20210517195748.8880-5-ebiederm@xmission.com
Reviewed-by: Marco Elver <elver@google.com>
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Now that si_trapno is part of the union in _si_fault and available on
all architectures, add SIL_FAULT_TRAPNO and update siginfo_layout to
return SIL_FAULT_TRAPNO when the code assumes si_trapno is valid.
There is room for future changes to reduce when si_trapno is valid but
this is all that is needed to make si_trapno and the other members of
the the union in _sigfault mutually exclusive.
Update the code that uses siginfo_layout to deal with SIL_FAULT_TRAPNO
and have the same code ignore si_trapno in in all other cases.
v1: https://lkml.kernel.org/r/m1o8dvs7s7.fsf_-_@fess.ebiederm.org
v2: https://lkml.kernel.org/r/20210505141101.11519-6-ebiederm@xmission.com
Link: https://lkml.kernel.org/r/20210517195748.8880-2-ebiederm@xmission.com
Reviewed-by: Marco Elver <elver@google.com>
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
When (ia->ia_valid & (ATTR_MODE | ATTR_UID | ATTR_GID)) is zero, then
the SELinux implementation of the locked_down hook might report a denial
even though the operation would actually be allowed.
To fix this, make sure that security_locked_down() is called only when
the return value will be taken into account (i.e. when changing one of
the problematic attributes).
Note: this was introduced by commit 5496197f9b08 ("debugfs: Restrict
debugfs when the kernel is locked down"), but it didn't matter at that
time, as the SELinux support came in later.
Fixes: 59438b46471a ("security,lockdown,selinux: implement SELinux lockdown")
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Ondrej Mosnacek <omosnace@redhat.com>
Link: https://lore.kernel.org/r/20210507125304.144394-1-omosnace@redhat.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'for-5.13-rc2-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux
Pull btrfs fixes from David Sterba:
"A few more fixes:
- fix fiemap to print extents that could get misreported due to
internal extent splitting and logical merging for fiemap output
- fix RCU stalls during delayed iputs
- fix removed dentries still existing after log is synced"
* tag 'for-5.13-rc2-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux:
btrfs: fix removed dentries still existing after log is synced
btrfs: return whole extents in fiemap
btrfs: avoid RCU stalls while running delayed iputs
btrfs: return 0 for dev_extent_hole_check_zoned hole_start in case of error
Deadstore detected by Lukas Bulwahn's CodeChecker Tool (ELISA group).
line 741 struct cifsInodeInfo *cinode;
line 747 cinode = CIFS_I(d_inode(cfile->dentry));
could be deleted.
cinode on filesystem should not be deleted when files are closed,
they are representations of some data fields on a physical disk,
thus no further action is required.
The virtual inode on vfs will be handled by vfs automatically,
and the denotation is inode, which is different from the cinode.
Signed-off-by: wenhuizhang <wenhui@gwmail.gwu.edu>
Reviewed-by: Aurelien Aptel <aaptel@suse.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
xfs_bmap_rtalloc doesn't handle realtime extent files with extent size
hints larger than the rt volume's extent size properly, because
xfs_bmap_extsize_align can adjust the offset/length parameters to try to
fit the extent size hint.
Under these conditions, minlen has to be large enough so that any
allocation returned by xfs_rtallocate_extent will be large enough to
cover at least one of the blocks that the caller asked for. If the
allocation is too short, bmapi_write will return no mapping for the
requested range, which causes ENOSPC errors in other parts of the
filesystem.
Therefore, adjust minlen upwards to fix this. This can be found by
running generic/263 (g/127 or g/522) with a realtime extent size hint
that's larger than the rt volume extent size.
Signed-off-by: Darrick J. Wong <djwong@kernel.org>
Reviewed-by: Allison Henderson <allison.henderson@oracle.com>
Merge misc fixes from Andrew Morton:
"13 patches.
Subsystems affected by this patch series: resource, squashfs, hfsplus,
modprobe, and mm (hugetlb, slub, userfaultfd, ksm, pagealloc, kasan,
pagemap, and ioremap)"
* emailed patches from Andrew Morton <akpm@linux-foundation.org>:
mm/ioremap: fix iomap_max_page_shift
docs: admin-guide: update description for kernel.modprobe sysctl
hfsplus: prevent corruption in shrinking truncate
mm/filemap: fix readahead return types
kasan: fix unit tests with CONFIG_UBSAN_LOCAL_BOUNDS enabled
mm: fix struct page layout on 32-bit systems
ksm: revert "use GET_KSM_PAGE_NOLOCK to get ksm page in remove_rmap_item_from_tree()"
userfaultfd: release page in error path to avoid BUG_ON
squashfs: fix divide error in calculate_skip()
kernel/resource: fix return code check in __request_free_mem_region
mm, slub: move slub_debug static key enabling outside slab_mutex
mm/hugetlb: fix cow where page writtable in child
mm/hugetlb: fix F_SEAL_FUTURE_WRITE
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Merge tag 'io_uring-5.13-2021-05-14' of git://git.kernel.dk/linux-block
Pull io_uring fixes from Jens Axboe:
"Just a few minor fixes/changes:
- Fix issue with double free race for linked timeout completions
- Fix reference issue with timeouts
- Remove last few places that make SQPOLL special, since it's just an
io thread now.
- Bump maximum allowed registered buffers, as we don't allocate as
much anymore"
* tag 'io_uring-5.13-2021-05-14' of git://git.kernel.dk/linux-block:
io_uring: increase max number of reg buffers
io_uring: further remove sqpoll limits on opcodes
io_uring: fix ltout double free on completion race
io_uring: fix link timeout refs
- update documentation to fix the broken illustration due to ReST
conversion by accident at that time and complete the big pcluster
introduction;
- fix 1 lcluster-sized pclusters for the big pcluster feature.
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Merge tag 'erofs-for-5.13-rc2-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs
Pull erofs fixes from Gao Xiang:
"This mainly fixes 1 lcluster-sized pclusters for the big pcluster
feature, which can be forcely generated by mkfs as a specific on-disk
case for per-(sub)file compression strategies but missed to handle in
runtime properly.
Also, documentation updates are included to fix the broken
illustration due to the ReST conversion by accident and complete the
big pcluster introduction.
Summary:
- update documentation to fix the broken illustration due to ReST
conversion by accident at that time and complete the big pcluster
introduction
- fix 1 lcluster-sized pclusters for the big pcluster feature"
* tag 'erofs-for-5.13-rc2-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs:
erofs: fix 1 lcluster-sized pcluster for big pcluster
erofs: update documentation about data compression
erofs: fix broken illustration in documentation
- Fix a hang condition (missed wakeups with virtiofs when invalidating
entries)
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Merge tag 'dax-fixes-5.13-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm
Pull dax fixes from Dan Williams:
"A fix for a hang condition due to missed wakeups in the filesystem-dax
core when exercised by virtiofs.
This bug has been there from the beginning, but the condition has
not triggered on other filesystems since they hold a lock over
invalidation events"
* tag 'dax-fixes-5.13-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/nvdimm/nvdimm:
dax: Wake up all waiters after invalidating dax entry
dax: Add a wakeup mode parameter to put_unlocked_entry()
dax: Add an enum for specifying dax wakup mode
I believe there are some issues introduced by commit 31651c607151
("hfsplus: avoid deadlock on file truncation")
HFS+ has extent records which always contains 8 extents. In case the
first extent record in catalog file gets full, new ones are allocated from
extents overflow file.
In case shrinking truncate happens to middle of an extent record which
locates in extents overflow file, the logic in hfsplus_file_truncate() was
changed so that call to hfs_brec_remove() is not guarded any more.
Right action would be just freeing the extents that exceed the new size
inside extent record by calling hfsplus_free_extents(), and then check if
the whole extent record should be removed. However since the guard
(blk_cnt > start) is now after the call to hfs_brec_remove(), this has
unfortunate effect that the last matching extent record is removed
unconditionally.
To reproduce this issue, create a file which has at least 10 extents, and
then perform shrinking truncate into middle of the last extent record, so
that the number of remaining extents is not under or divisible by 8. This
causes the last extent record (8 extents) to be removed totally instead of
truncating into middle of it. Thus this causes corruption, and lost data.
Fix for this is simply checking if the new truncated end is below the
start of this extent record, making it safe to remove the full extent
record. However call to hfs_brec_remove() can't be moved to it's previous
place since we're dropping ->tree_lock and it can cause a race condition
and the cached info being invalidated possibly corrupting the node data.
Another issue is related to this one. When entering into the block
(blk_cnt > start) we are not holding the ->tree_lock. We break out from
the loop not holding the lock, but hfs_find_exit() does unlock it. Not
sure if it's possible for someone else to take the lock under our feet,
but it can cause hard to debug errors and premature unlocking. Even if
there's no real risk of it, the locking should still always be kept in
balance. Thus taking the lock now just before the check.
Link: https://lkml.kernel.org/r/20210429165139.3082828-1-jouni.roivas@tuxera.com
Fixes: 31651c607151f ("hfsplus: avoid deadlock on file truncation")
Signed-off-by: Jouni Roivas <jouni.roivas@tuxera.com>
Reviewed-by: Anton Altaparmakov <anton@tuxera.com>
Cc: Anatoly Trosinenko <anatoly.trosinenko@gmail.com>
Cc: Viacheslav Dubeyko <slava@dubeyko.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
A readahead request will not allocate more memory than can be represented
by a size_t, even on systems that have HIGHMEM available. Change the
length functions from returning an loff_t to a size_t.
Link: https://lkml.kernel.org/r/20210510201201.1558972-1-willy@infradead.org
Fixes: 32c0a6bcaa1f57 ("btrfs: add and use readahead_batch_length")
Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: Darrick J. Wong <djwong@kernel.org>
Reported-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Sysbot has reported a "divide error" which has been identified as being
caused by a corrupted file_size value within the file inode. This value
has been corrupted to a much larger value than expected.
Calculate_skip() is passed i_size_read(inode) >> msblk->block_log. Due to
the file_size value corruption this overflows the int argument/variable in
that function, leading to the divide error.
This patch changes the function to use u64. This will accommodate any
unexpectedly large values due to corruption.
The value returned from calculate_skip() is clamped to be never more than
SQUASHFS_CACHED_BLKS - 1, or 7. So file_size corruption does not lead to
an unexpectedly large return result here.
Link: https://lkml.kernel.org/r/20210507152618.9447-1-phillip@squashfs.org.uk
Signed-off-by: Phillip Lougher <phillip@squashfs.org.uk>
Reported-by: <syzbot+e8f781243ce16ac2f962@syzkaller.appspotmail.com>
Reported-by: <syzbot+7b98870d4fec9447b951@syzkaller.appspotmail.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Patch series "mm/hugetlb: Fix issues on file sealing and fork", v2.
Hugh reported issue with F_SEAL_FUTURE_WRITE not applied correctly to
hugetlbfs, which I can easily verify using the memfd_test program, which
seems that the program is hardly run with hugetlbfs pages (as by default
shmem).
Meanwhile I found another probably even more severe issue on that hugetlb
fork won't wr-protect child cow pages, so child can potentially write to
parent private pages. Patch 2 addresses that.
After this series applied, "memfd_test hugetlbfs" should start to pass.
This patch (of 2):
F_SEAL_FUTURE_WRITE is missing for hugetlb starting from the first day.
There is a test program for that and it fails constantly.
$ ./memfd_test hugetlbfs
memfd-hugetlb: CREATE
memfd-hugetlb: BASIC
memfd-hugetlb: SEAL-WRITE
memfd-hugetlb: SEAL-FUTURE-WRITE
mmap() didn't fail as expected
Aborted (core dumped)
I think it's probably because no one is really running the hugetlbfs test.
Fix it by checking FUTURE_WRITE also in hugetlbfs_file_mmap() as what we
do in shmem_mmap(). Generalize a helper for that.
Link: https://lkml.kernel.org/r/20210503234356.9097-1-peterx@redhat.com
Link: https://lkml.kernel.org/r/20210503234356.9097-2-peterx@redhat.com
Fixes: ab3948f58ff84 ("mm/memfd: add an F_SEAL_FUTURE_WRITE seal to memfd")
Signed-off-by: Peter Xu <peterx@redhat.com>
Reported-by: Hugh Dickins <hughd@google.com>
Reviewed-by: Mike Kravetz <mike.kravetz@oracle.com>
Cc: Joel Fernandes (Google) <joel@joelfernandes.org>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This series of patches fix some critical bugs such as memory leak in compression
flows, kernel panic when handling errors, and swapon failure due to newly added
condition check.
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Merge tag 'f2fs-5.13-rc1-fix' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs
Pull f2fs fixes from Jaegeuk Kim:
"This fixes some critical bugs such as memory leak in compression
flows, kernel panic when handling errors, and swapon failure due to
newly added condition check"
* tag 'f2fs-5.13-rc1-fix' of git://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs:
f2fs: return EINVAL for hole cases in swap file
f2fs: avoid swapon failure by giving a warning first
f2fs: compress: fix to assign cc.cluster_idx correctly
f2fs: compress: fix race condition of overwrite vs truncate
f2fs: compress: fix to free compress page correctly
f2fs: support iflag change given the mask
f2fs: avoid null pointer access when handling IPU error
Since recent changes instead of storing a large array of struct
io_mapped_ubuf, we store pointers to them, that is 4 times slimmer and
we should not to so worry about restricting max number of registererd
buffer slots, increase the limit 4 times.
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/d3dee1da37f46da416aa96a16bf9e5094e10584d.1620990371.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
When we move one inode from one directory to another and both the inode
and its previous parent directory were logged before, we are not supposed
to have the dentry for the old parent if we have a power failure after the
log is synced. Only the new dentry is supposed to exist.
Generally this works correctly, however there is a scenario where this is
not currently working, because the old parent of the file/directory that
was moved is not authoritative for a range that includes the dir index and
dir item keys of the old dentry. This case is better explained with the
following example and reproducer:
# The test requires a very specific layout of keys and items in the
# fs/subvolume btree to trigger the bug. So we want to make sure that
# on whatever platform we are, we have the same leaf/node size.
#
# Currently in btrfs the node/leaf size can not be smaller than the page
# size (but it can be greater than the page size). So use the largest
# supported node/leaf size (64K).
$ mkfs.btrfs -f -n 65536 /dev/sdc
$ mount /dev/sdc /mnt
# "testdir" is inode 257.
$ mkdir /mnt/testdir
$ chmod 755 /mnt/testdir
# Create several empty files to have the directory "testdir" with its
# items spread over several leaves (7 in this case).
$ for ((i = 1; i <= 1200; i++)); do
echo -n > /mnt/testdir/file$i
done
# Create our test directory "dira", inode number 1458, which gets all
# its items in leaf 7.
#
# The BTRFS_DIR_ITEM_KEY item for inode 257 ("testdir") that points to
# the entry named "dira" is in leaf 2, while the BTRFS_DIR_INDEX_KEY
# item that points to that entry is in leaf 3.
#
# For this particular filesystem node size (64K), file count and file
# names, we endup with the directory entry items from inode 257 in
# leaves 2 and 3, as previously mentioned - what matters for triggering
# the bug exercised by this test case is that those items are not placed
# in leaf 1, they must be placed in a leaf different from the one
# containing the inode item for inode 257.
#
# The corresponding BTRFS_DIR_ITEM_KEY and BTRFS_DIR_INDEX_KEY items for
# the parent inode (257) are the following:
#
# item 460 key (257 DIR_ITEM 3724298081) itemoff 48344 itemsize 34
# location key (1458 INODE_ITEM 0) type DIR
# transid 6 data_len 0 name_len 4
# name: dira
#
# and:
#
# item 771 key (257 DIR_INDEX 1202) itemoff 36673 itemsize 34
# location key (1458 INODE_ITEM 0) type DIR
# transid 6 data_len 0 name_len 4
# name: dira
$ mkdir /mnt/testdir/dira
# Make sure everything done so far is durably persisted.
$ sync
# Now do a change to inode 257 ("testdir") that does not result in
# COWing leaves 2 and 3 - the leaves that contain the directory items
# pointing to inode 1458 (directory "dira").
#
# Changing permissions, the owner/group, updating or adding a xattr,
# etc, will not change (COW) leaves 2 and 3. So for the sake of
# simplicity change the permissions of inode 257, which results in
# updating its inode item and therefore change (COW) only leaf 1.
$ chmod 700 /mnt/testdir
# Now fsync directory inode 257.
#
# Since only the first leaf was changed/COWed, we log the inode item of
# inode 257 and only the dentries found in the first leaf, all have a
# key type of BTRFS_DIR_ITEM_KEY, and no keys of type
# BTRFS_DIR_INDEX_KEY, because they sort after the former type and none
# exist in the first leaf.
#
# We also log 3 items that represent ranges for dir items and dir
# indexes for which the log is authoritative:
#
# 1) a key of type BTRFS_DIR_LOG_ITEM_KEY, which indicates the log is
# authoritative for all BTRFS_DIR_ITEM_KEY keys that have an offset
# in the range [0, 2285968570] (the offset here is the crc32c of the
# dentry's name). The value 2285968570 corresponds to the offset of
# the first key of leaf 2 (which is of type BTRFS_DIR_ITEM_KEY);
#
# 2) a key of type BTRFS_DIR_LOG_ITEM_KEY, which indicates the log is
# authoritative for all BTRFS_DIR_ITEM_KEY keys that have an offset
# in the range [4293818216, (u64)-1] (the offset here is the crc32c
# of the dentry's name). The value 4293818216 corresponds to the
# offset of the highest key of type BTRFS_DIR_ITEM_KEY plus 1
# (4293818215 + 1), which is located in leaf 2;
#
# 3) a key of type BTRFS_DIR_LOG_INDEX_KEY, with an offset of 1203,
# which indicates the log is authoritative for all keys of type
# BTRFS_DIR_INDEX_KEY that have an offset in the range
# [1203, (u64)-1]. The value 1203 corresponds to the offset of the
# last key of type BTRFS_DIR_INDEX_KEY plus 1 (1202 + 1), which is
# located in leaf 3;
#
# Also, because "testdir" is a directory and inode 1458 ("dira") is a
# child directory, we log inode 1458 too.
$ xfs_io -c "fsync" /mnt/testdir
# Now move "dira", inode 1458, to be a child of the root directory
# (inode 256).
#
# Because this inode was previously logged, when "testdir" was fsynced,
# the log is updated so that the old inode reference, referring to inode
# 257 as the parent, is deleted and the new inode reference, referring
# to inode 256 as the parent, is added to the log.
$ mv /mnt/testdir/dira /mnt
# Now change some file and fsync it. This guarantees the log changes
# made by the previous move/rename operation are persisted. We do not
# need to do any special modification to the file, just any change to
# any file and sync the log.
$ xfs_io -c "pwrite -S 0xab 0 64K" -c "fsync" /mnt/testdir/file1
# Simulate a power failure and then mount again the filesystem to
# replay the log tree. We want to verify that we are able to mount the
# filesystem, meaning log replay was successful, and that directory
# inode 1458 ("dira") only has inode 256 (the filesystem's root) as
# its parent (and no longer a child of inode 257).
#
# It used to happen that during log replay we would end up having
# inode 1458 (directory "dira") with 2 hard links, being a child of
# inode 257 ("testdir") and inode 256 (the filesystem's root). This
# resulted in the tree checker detecting the issue and causing the
# mount operation to fail (with -EIO).
#
# This happened because in the log we have the new name/parent for
# inode 1458, which results in adding the new dentry with inode 256
# as the parent, but the previous dentry, under inode 257 was never
# removed - this is because the ranges for dir items and dir indexes
# of inode 257 for which the log is authoritative do not include the
# old dir item and dir index for the dentry of inode 257 referring to
# inode 1458:
#
# - for dir items, the log is authoritative for the ranges
# [0, 2285968570] and [4293818216, (u64)-1]. The dir item at inode 257
# pointing to inode 1458 has a key of (257 DIR_ITEM 3724298081), as
# previously mentioned, so the dir item is not deleted when the log
# replay procedure processes the authoritative ranges, as 3724298081
# is outside both ranges;
#
# - for dir indexes, the log is authoritative for the range
# [1203, (u64)-1], and the dir index item of inode 257 pointing to
# inode 1458 has a key of (257 DIR_INDEX 1202), as previously
# mentioned, so the dir index item is not deleted when the log
# replay procedure processes the authoritative range.
<power failure>
$ mount /dev/sdc /mnt
mount: /mnt: can't read superblock on /dev/sdc.
$ dmesg
(...)
[87849.840509] BTRFS info (device sdc): start tree-log replay
[87849.875719] BTRFS critical (device sdc): corrupt leaf: root=5 block=30539776 slot=554 ino=1458, invalid nlink: has 2 expect no more than 1 for dir
[87849.878084] BTRFS info (device sdc): leaf 30539776 gen 7 total ptrs 557 free space 2092 owner 5
[87849.879516] BTRFS info (device sdc): refs 1 lock_owner 0 current 2099108
[87849.880613] item 0 key (1181 1 0) itemoff 65275 itemsize 160
[87849.881544] inode generation 6 size 0 mode 100644
[87849.882692] item 1 key (1181 12 257) itemoff 65258 itemsize 17
(...)
[87850.562549] item 556 key (1458 12 257) itemoff 16017 itemsize 14
[87850.563349] BTRFS error (device dm-0): block=30539776 write time tree block corruption detected
[87850.564386] ------------[ cut here ]------------
[87850.564920] WARNING: CPU: 3 PID: 2099108 at fs/btrfs/disk-io.c:465 csum_one_extent_buffer+0xed/0x100 [btrfs]
[87850.566129] Modules linked in: btrfs dm_zero dm_snapshot (...)
[87850.573789] CPU: 3 PID: 2099108 Comm: mount Not tainted 5.12.0-rc8-btrfs-next-86 #1
(...)
[87850.587481] Call Trace:
[87850.587768] btree_csum_one_bio+0x244/0x2b0 [btrfs]
[87850.588354] ? btrfs_bio_fits_in_stripe+0xd8/0x110 [btrfs]
[87850.589003] btrfs_submit_metadata_bio+0xb7/0x100 [btrfs]
[87850.589654] submit_one_bio+0x61/0x70 [btrfs]
[87850.590248] submit_extent_page+0x91/0x2f0 [btrfs]
[87850.590842] write_one_eb+0x175/0x440 [btrfs]
[87850.591370] ? find_extent_buffer_nolock+0x1c0/0x1c0 [btrfs]
[87850.592036] btree_write_cache_pages+0x1e6/0x610 [btrfs]
[87850.592665] ? free_debug_processing+0x1d5/0x240
[87850.593209] do_writepages+0x43/0xf0
[87850.593798] ? __filemap_fdatawrite_range+0xa4/0x100
[87850.594391] __filemap_fdatawrite_range+0xc5/0x100
[87850.595196] btrfs_write_marked_extents+0x68/0x160 [btrfs]
[87850.596202] btrfs_write_and_wait_transaction.isra.0+0x4d/0xd0 [btrfs]
[87850.597377] btrfs_commit_transaction+0x794/0xca0 [btrfs]
[87850.598455] ? _raw_spin_unlock_irqrestore+0x32/0x60
[87850.599305] ? kmem_cache_free+0x15a/0x3d0
[87850.600029] btrfs_recover_log_trees+0x346/0x380 [btrfs]
[87850.601021] ? replay_one_extent+0x7d0/0x7d0 [btrfs]
[87850.601988] open_ctree+0x13c9/0x1698 [btrfs]
[87850.602846] btrfs_mount_root.cold+0x13/0xed [btrfs]
[87850.603771] ? kmem_cache_alloc_trace+0x7c9/0x930
[87850.604576] ? vfs_parse_fs_string+0x5d/0xb0
[87850.605293] ? kfree+0x276/0x3f0
[87850.605857] legacy_get_tree+0x30/0x50
[87850.606540] vfs_get_tree+0x28/0xc0
[87850.607163] fc_mount+0xe/0x40
[87850.607695] vfs_kern_mount.part.0+0x71/0x90
[87850.608440] btrfs_mount+0x13b/0x3e0 [btrfs]
(...)
[87850.629477] ---[ end trace 68802022b99a1ea0 ]---
[87850.630849] BTRFS: error (device sdc) in btrfs_commit_transaction:2381: errno=-5 IO failure (Error while writing out transaction)
[87850.632422] BTRFS warning (device sdc): Skipping commit of aborted transaction.
[87850.633416] BTRFS: error (device sdc) in cleanup_transaction:1978: errno=-5 IO failure
[87850.634553] BTRFS: error (device sdc) in btrfs_replay_log:2431: errno=-5 IO failure (Failed to recover log tree)
[87850.637529] BTRFS error (device sdc): open_ctree failed
In this example the inode we moved was a directory, so it was easy to
detect the problem because directories can only have one hard link and
the tree checker immediately detects that. If the moved inode was a file,
then the log replay would succeed and we would end up having both the
new hard link (/mnt/foo) and the old hard link (/mnt/testdir/foo) present,
but only the new one should be present.
Fix this by forcing re-logging of the old parent directory when logging
the new name during a rename operation. This ensures we end up with a log
that is authoritative for a range covering the keys for the old dentry,
therefore causing the old dentry do be deleted when replaying the log.
A test case for fstests will follow up soon.
Fixes: 64d6b281ba4db0 ("btrfs: remove unnecessary check_parent_dirs_for_sync()")
CC: stable@vger.kernel.org # 5.12+
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
`xfs_io -c 'fiemap <off> <len>' <file>`
can give surprising results on btrfs that differ from xfs.
btrfs prints out extents trimmed to fit the user input. If the user's
fiemap request has an offset, then rather than returning each whole
extent which intersects that range, we also trim the start extent to not
have start < off.
Documentation in filesystems/fiemap.txt and the xfs_io man page suggests
that returning the whole extent is expected.
Some cases which all yield the same fiemap in xfs, but not btrfs:
dd if=/dev/zero of=$f bs=4k count=1
sudo xfs_io -c 'fiemap 0 1024' $f
0: [0..7]: 26624..26631
sudo xfs_io -c 'fiemap 2048 1024' $f
0: [4..7]: 26628..26631
sudo xfs_io -c 'fiemap 2048 4096' $f
0: [4..7]: 26628..26631
sudo xfs_io -c 'fiemap 3584 512' $f
0: [7..7]: 26631..26631
sudo xfs_io -c 'fiemap 4091 5' $f
0: [7..6]: 26631..26630
I believe this is a consequence of the logic for merging contiguous
extents represented by separate extent items. That logic needs to track
the last offset as it loops through the extent items, which happens to
pick up the start offset on the first iteration, and trim off the
beginning of the full extent. To fix it, start `off` at 0 rather than
`start` so that we keep the iteration/merging intact without cutting off
the start of the extent.
after the fix, all the above commands give:
0: [0..7]: 26624..26631
The merging logic is exercised by fstest generic/483, and I have written
a new fstest for checking we don't have backwards or zero-length fiemaps
for cases like those above.
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Boris Burkov <boris@bur.io>
Signed-off-by: David Sterba <dsterba@suse.com>
Generally a delayed iput is added when we might do the final iput, so
usually we'll end up sleeping while processing the delayed iputs
naturally. However there's no guarantee of this, especially for small
files. In production we noticed 5 instances of RCU stalls while testing
a kernel release overnight across 1000 machines, so this is relatively
common:
host count: 5
rcu: INFO: rcu_sched self-detected stall on CPU
rcu: ....: (20998 ticks this GP) idle=59e/1/0x4000000000000002 softirq=12333372/12333372 fqs=3208
(t=21031 jiffies g=27810193 q=41075) NMI backtrace for cpu 1
CPU: 1 PID: 1713 Comm: btrfs-cleaner Kdump: loaded Not tainted 5.6.13-0_fbk12_rc1_5520_gec92bffc1ec9 #1
Call Trace:
<IRQ> dump_stack+0x50/0x70
nmi_cpu_backtrace.cold.6+0x30/0x65
? lapic_can_unplug_cpu.cold.30+0x40/0x40
nmi_trigger_cpumask_backtrace+0xba/0xca
rcu_dump_cpu_stacks+0x99/0xc7
rcu_sched_clock_irq.cold.90+0x1b2/0x3a3
? trigger_load_balance+0x5c/0x200
? tick_sched_do_timer+0x60/0x60
? tick_sched_do_timer+0x60/0x60
update_process_times+0x24/0x50
tick_sched_timer+0x37/0x70
__hrtimer_run_queues+0xfe/0x270
hrtimer_interrupt+0xf4/0x210
smp_apic_timer_interrupt+0x5e/0x120
apic_timer_interrupt+0xf/0x20 </IRQ>
RIP: 0010:queued_spin_lock_slowpath+0x17d/0x1b0
RSP: 0018:ffffc9000da5fe48 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13
RAX: 0000000000000000 RBX: ffff889fa81d0cd8 RCX: 0000000000000029
RDX: ffff889fff86c0c0 RSI: 0000000000080000 RDI: ffff88bfc2da7200
RBP: ffff888f2dcdd768 R08: 0000000001040000 R09: 0000000000000000
R10: 0000000000000001 R11: ffffffff82a55560 R12: ffff88bfc2da7200
R13: 0000000000000000 R14: ffff88bff6c2a360 R15: ffffffff814bd870
? kzalloc.constprop.57+0x30/0x30
list_lru_add+0x5a/0x100
inode_lru_list_add+0x20/0x40
iput+0x1c1/0x1f0
run_delayed_iput_locked+0x46/0x90
btrfs_run_delayed_iputs+0x3f/0x60
cleaner_kthread+0xf2/0x120
kthread+0x10b/0x130
Fix this by adding a cond_resched_lock() to the loop processing delayed
iputs so we can avoid these sort of stalls.
CC: stable@vger.kernel.org # 4.9+
Reviewed-by: Rik van Riel <riel@surriel.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Commit 7000babddac6 ("btrfs: assign proper values to a bool variable in
dev_extent_hole_check_zoned") assigned false to the hole_start parameter
of dev_extent_hole_check_zoned().
The hole_start parameter is not boolean and returns the start location of
the found hole.
Fixes: 7000babddac6 ("btrfs: assign proper values to a bool variable in dev_extent_hole_check_zoned")
Signed-off-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
crypt_stat memory itself is allocated when inode is created, in
ecryptfs_alloc_inode, which returns NULL on failure and is handled
by callers, which would prevent us getting to this point. It then
calls ecryptfs_init_crypt_stat which allocates crypt_stat->tfm
checking for and likewise handling allocation failure. Finally,
crypt_stat->flags has ECRYPTFS_STRUCT_INITIALIZED merged into it
in ecryptfs_init_crypt_stat as well.
Simply put, the conditions that the BUG_ON checks for will never
be triggered, as to even get to this function, the relevant conditions
will have already been fulfilled (or the inode allocation would fail in
the first place and thus no call to this function or those above it).
Cc: Tyler Hicks <code@tyhicks.com>
Signed-off-by: Phillip Potter <phil@philpotter.co.uk>
Link: https://lore.kernel.org/r/20210503115736.2104747-50-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This reverts commit 2c2a7552dd6465e8fde6bc9cccf8d66ed1c1eb72.
Because of recent interactions with developers from @umn.edu, all
commits from them have been recently re-reviewed to ensure if they were
correct or not.
Upon review, this commit was found to be incorrect for the reasons
below, so it must be reverted. It will be fixed up "correctly" in a
later kernel change.
The original commit log for this change was incorrect, no "error
handling code" was added, things will blow up just as badly as before if
any of these cases ever were true. As this BUG_ON() never fired, and
most of these checks are "obviously" never going to be true, let's just
revert to the original code for now until this gets unwound to be done
correctly in the future.
Cc: Aditya Pakki <pakki001@umn.edu>
Fixes: 2c2a7552dd64 ("ecryptfs: replace BUG_ON with error handling code")
Cc: stable <stable@vger.kernel.org>
Acked-by: Tyler Hicks <code@tyhicks.com>
Link: https://lore.kernel.org/r/20210503115736.2104747-49-gregkh@linuxfoundation.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
If the 1st NONHEAD lcluster of a pcluster isn't CBLKCNT lcluster type
rather than a HEAD or PLAIN type instead, which means its pclustersize
_must_ be 1 lcluster (since its uncompressed size < 2 lclusters),
as illustrated below:
HEAD HEAD / PLAIN lcluster type
____________ ____________
|_:__________|_________:__| file data (uncompressed)
. .
.____________.
|____________| pcluster data (compressed)
Such on-disk case was explained before [1] but missed to be handled
properly in the runtime implementation.
It can be observed if manually generating 1 lcluster-sized pcluster
with 2 lclusters (thus CBLKCNT doesn't exist.) Let's fix it now.
[1] https://lore.kernel.org/r/20210407043927.10623-1-xiang@kernel.org
Link: https://lore.kernel.org/r/20210510064715.29123-1-xiang@kernel.org
Fixes: cec6e93beadf ("erofs: support parsing big pcluster compress indexes")
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Gao Xiang <xiang@kernel.org>
We currently don't have any filesystems that support idmapped mounts
which are mountable inside a user namespace. That was a deliberate
decision for now as a userns root can just mount the filesystem
themselves. So enforce this restriction explicitly until there's a real
use-case for this. This way we can notice it and will have a chance to
adapt and audit our translation helpers and fstests appropriately if we
need to support such filesystems.
Cc: Christoph Hellwig <hch@lst.de>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: stable@vger.kernel.org
CC: linux-fsdevel@vger.kernel.org
Suggested-by: Seth Forshee <seth.forshee@canonical.com>
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
The final solution can be migrating blocks to form a section-aligned file
internally. Meanwhile, let's ask users to do that when preparing the swap
file initially like:
1) create()
2) ioctl(F2FS_IOC_SET_PIN_FILE)
3) fallocate()
Reported-by: kernel test robot <oliver.sang@intel.com>
Fixes: 36e4d95891ed ("f2fs: check if swapfile is section-alligned")
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
In f2fs_destroy_compress_ctx(), after f2fs_destroy_compress_ctx(),
cc.cluster_idx will be cleared w/ NULL_CLUSTER, f2fs_cluster_blocks()
may check wrong cluster metadata, fix it.
Fixes: 4c8ff7095bef ("f2fs: support data compression")
Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
pos_fsstress testcase complains a panic as belew:
------------[ cut here ]------------
kernel BUG at fs/f2fs/compress.c:1082!
invalid opcode: 0000 [#1] SMP PTI
CPU: 4 PID: 2753477 Comm: kworker/u16:2 Tainted: G OE 5.12.0-rc1-custom #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.14.0-2 04/01/2014
Workqueue: writeback wb_workfn (flush-252:16)
RIP: 0010:prepare_compress_overwrite+0x4c0/0x760 [f2fs]
Call Trace:
f2fs_prepare_compress_overwrite+0x5f/0x80 [f2fs]
f2fs_write_cache_pages+0x468/0x8a0 [f2fs]
f2fs_write_data_pages+0x2a4/0x2f0 [f2fs]
do_writepages+0x38/0xc0
__writeback_single_inode+0x44/0x2a0
writeback_sb_inodes+0x223/0x4d0
__writeback_inodes_wb+0x56/0xf0
wb_writeback+0x1dd/0x290
wb_workfn+0x309/0x500
process_one_work+0x220/0x3c0
worker_thread+0x53/0x420
kthread+0x12f/0x150
ret_from_fork+0x22/0x30
The root cause is truncate() may race with overwrite as below,
so that one reference count left in page can not guarantee the
page attaching in mapping tree all the time, after truncation,
later find_lock_page() may return NULL pointer.
- prepare_compress_overwrite
- f2fs_pagecache_get_page
- unlock_page
- f2fs_setattr
- truncate_setsize
- truncate_inode_page
- delete_from_page_cache
- find_lock_page
Fix this by avoiding referencing updated page.
Fixes: 4c8ff7095bef ("f2fs: support data compression")
Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
In error path of f2fs_write_compressed_pages(), it needs to call
f2fs_compress_free_page() to release temporary page.
Fixes: 5e6bbde95982 ("f2fs: introduce mempool for {,de}compress intermediate page allocation")
Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
In f2fs_fileattr_set(),
if (!fa->flags_valid)
mask &= FS_COMMON_FL;
In this case, we can set supported flags by mask only instead of BUG_ON.
/* Flags shared betwen flags/xflags */
(FS_SYNC_FL | FS_IMMUTABLE_FL | FS_APPEND_FL | \
FS_NODUMP_FL | FS_NOATIME_FL | FS_DAX_FL | \
FS_PROJINHERIT_FL)
Fixes: 9b1bb01c8ae7 ("f2fs: convert to fileattr")
Reviewed-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
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Merge tag 'for-5.13-rc1-part2-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux
Pull btrfs fix from David Sterba:
"Handle transaction start error in btrfs_fileattr_set()
This is fix for code introduced by the new fileattr merge"
* tag 'for-5.13-rc1-part2-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux:
btrfs: handle transaction start error in btrfs_fileattr_set
Add error handling in btrfs_fileattr_set in case of an error while
starting a transaction. This fixes btrfs/232 which otherwise used to
fail with below signature on Power.
btrfs/232 [ 1119.474650] run fstests btrfs/232 at 2021-04-21 02:21:22
<...>
[ 1366.638585] BUG: Unable to handle kernel data access on read at 0xffffffffffffff86
[ 1366.638768] Faulting instruction address: 0xc0000000009a5c88
cpu 0x0: Vector: 380 (Data SLB Access) at [c000000014f177b0]
pc: c0000000009a5c88: btrfs_update_root_times+0x58/0xc0
lr: c0000000009a5c84: btrfs_update_root_times+0x54/0xc0
<...>
pid = 24881, comm = fsstress
btrfs_update_inode+0xa0/0x140
btrfs_fileattr_set+0x5d0/0x6f0
vfs_fileattr_set+0x2a8/0x390
do_vfs_ioctl+0x1290/0x1ac0
sys_ioctl+0x6c/0x120
system_call_exception+0x3d4/0x410
system_call_common+0xec/0x278
Fixes: 97fc29775487 ("btrfs: convert to fileattr")
Signed-off-by: Ritesh Harjani <riteshh@linux.ibm.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
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Merge tag 'for-5.13-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux
Pull btrfs fixes from David Sterba:
"First batch of various fixes, here's a list of notable ones:
- fix unmountable seed device after fstrim
- fix silent data loss in zoned mode due to ordered extent splitting
- fix race leading to unpersisted data and metadata on fsync
- fix deadlock when cloning inline extents and using qgroups"
* tag 'for-5.13-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux:
btrfs: initialize return variable in cleanup_free_space_cache_v1
btrfs: zoned: sanity check zone type
btrfs: fix unmountable seed device after fstrim
btrfs: fix deadlock when cloning inline extents and using qgroups
btrfs: fix race leading to unpersisted data and metadata on fsync
btrfs: do not consider send context as valid when trying to flush qgroups
btrfs: zoned: fix silent data loss after failure splitting ordered extent
