-----BEGIN PGP SIGNATURE-----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=KWL7
-----END PGP SIGNATURE-----
Merge tag 'for-4.18-rc2-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux
Pull btrfs fixes from David Sterba:
"We have a few regression fixes for qgroup rescan status tracking and
the vm_fault_t conversion that mixed up the error values"
* tag 'for-4.18-rc2-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux:
Btrfs: fix mount failure when qgroup rescan is in progress
Btrfs: fix regression in btrfs_page_mkwrite() from vm_fault_t conversion
btrfs: quota: Set rescan progress to (u64)-1 if we hit last leaf
Pull vfs fix from Al Viro:
"Followup to procfs-seq_file series this window"
This fixes a memory leak by making sure that proc seq files release any
private data on close. The 'proc_seq_open' has to be properly paired
with 'proc_seq_release' that releases the extra private data.
* 'fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
proc: add proc_seq_release
The poll() changes were not well thought out, and completely
unexplained. They also caused a huge performance regression, because
"->poll()" was no longer a trivial file operation that just called down
to the underlying file operations, but instead did at least two indirect
calls.
Indirect calls are sadly slow now with the Spectre mitigation, but the
performance problem could at least be largely mitigated by changing the
"->get_poll_head()" operation to just have a per-file-descriptor pointer
to the poll head instead. That gets rid of one of the new indirections.
But that doesn't fix the new complexity that is completely unwarranted
for the regular case. The (undocumented) reason for the poll() changes
was some alleged AIO poll race fixing, but we don't make the common case
slower and more complex for some uncommon special case, so this all
really needs way more explanations and most likely a fundamental
redesign.
[ This revert is a revert of about 30 different commits, not reverted
individually because that would just be unnecessarily messy - Linus ]
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Christoph Hellwig <hch@lst.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
If a power failure happens while the qgroup rescan kthread is running,
the next mount operation will always fail. This is because of a recent
regression that makes qgroup_rescan_init() incorrectly return -EINVAL
when we are mounting the filesystem (through btrfs_read_qgroup_config()).
This causes the -EINVAL error to be returned regardless of any qgroup
flags being set instead of returning the error only when neither of
the flags BTRFS_QGROUP_STATUS_FLAG_RESCAN nor BTRFS_QGROUP_STATUS_FLAG_ON
are set.
A test case for fstests follows up soon.
Fixes: 9593bf4967 ("btrfs: qgroup: show more meaningful qgroup_rescan_init error message")
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
The vm_fault_t conversion commit introduced a ret2 variable for tracking
the integer return values from internal btrfs functions. It was
sometimes returning VM_FAULT_LOCKED for pages that were actually invalid
and had been removed from the radix. Something like this:
ret2 = btrfs_delalloc_reserve_space() // returns zero on success
lock_page(page)
if (page->mapping != inode->i_mapping)
goto out_unlock;
...
out_unlock:
if (!ret2) {
...
return VM_FAULT_LOCKED;
}
This ends up triggering this WARNING in btrfs_destroy_inode()
WARN_ON(BTRFS_I(inode)->block_rsv.size);
xfstests generic/095 was able to reliably reproduce the errors.
Since out_unlock: is only used for errors, this fix moves it below the
if (!ret2) check we use to return VM_FAULT_LOCKED for success.
Fixes: a528a24150 (btrfs: change return type of btrfs_page_mkwrite to vm_fault_t)
Signed-off-by: Chris Mason <clm@fb.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Commit ff3d27a048 ("btrfs: qgroup: Finish rescan when hit the last leaf
of extent tree") added a new exit for rescan finish.
However after finishing quota rescan, we set
fs_info->qgroup_rescan_progress to (u64)-1 before we exit through the
original exit path.
While we missed that assignment of (u64)-1 in the new exit path.
The end result is, the quota status item doesn't have the same value.
(-1 vs the last bytenr + 1)
Although it doesn't affect quota accounting, it's still better to keep
the original behavior.
Reported-by: Misono Tomohiro <misono.tomohiro@jp.fujitsu.com>
Fixes: ff3d27a048 ("btrfs: qgroup: Finish rescan when hit the last leaf of extent tree")
Signed-off-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: Misono Tomohiro <misono.tomohiro@jp.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.com>
kmemleak reported some memory leak on reading proc files. After adding
some debug lines, find that proc_seq_fops is using seq_release as
release handler, which won't handle the free of 'private' field of
seq_file, while in fact the open handler proc_seq_open could create
the private data with __seq_open_private when state_size is greater
than zero. So after reading files created with proc_create_seq_private,
such as /proc/timer_list and /proc/vmallocinfo, the private mem of a
seq_file is not freed. Fix it by adding the paired proc_seq_release
as the default release handler of proc_seq_ops instead of seq_release.
Fixes: 44414d82cf ("proc: introduce proc_create_seq_private")
Reviewed-by: Christoph Hellwig <hch@lst.de>
CC: Christoph Hellwig <hch@lst.de>
Signed-off-by: Chunyu Hu <chuhu@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
- More metadata validation strengthening to prevent crashes.
- Fix extent offset overflow problem when insert_range on a 512b block fs
- Fix some off-by-one errors in the realtime fsmap code
- Fix some math errors in the default resblks calculation when free space
is low
- Fix a problem where stale page contents are exposed via mmap read
after a zero_range at eof
- Fix accounting problems with per-ag reservations causing statfs
reports to vary incorrectly
-----BEGIN PGP SIGNATURE-----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=Aw39
-----END PGP SIGNATURE-----
Merge tag 'xfs-4.18-fixes-2' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux
Pull xfs fixes from Darrick Wong:
"Here are some patches for 4.18 to fix regressions, accounting
problems, overflow problems, and to strengthen metadata validation to
prevent corruption.
This series has been run through a full xfstests run over the weekend
and through a quick xfstests run against this morning's master, with
no major failures reported.
Changes since last update:
- more metadata validation strengthening to prevent crashes.
- fix extent offset overflow problem when insert_range on a 512b
block fs
- fix some off-by-one errors in the realtime fsmap code
- fix some math errors in the default resblks calculation when free
space is low
- fix a problem where stale page contents are exposed via mmap read
after a zero_range at eof
- fix accounting problems with per-ag reservations causing statfs
reports to vary incorrectly"
* tag 'xfs-4.18-fixes-2' of git://git.kernel.org/pub/scm/fs/xfs/xfs-linux:
xfs: fix fdblocks accounting w/ RMAPBT per-AG reservation
xfs: ensure post-EOF zeroing happens after zeroing part of a file
xfs: fix off-by-one error in xfs_rtalloc_query_range
xfs: fix uninitialized field in rtbitmap fsmap backend
xfs: recheck reflink state after grabbing ILOCK_SHARED for a write
xfs: don't allow insert-range to shift extents past the maximum offset
xfs: don't trip over negative free space in xfs_reserve_blocks
xfs: allow empty transactions while frozen
xfs: xfs_iflush_abort() can be called twice on cluster writeback failure
xfs: More robust inode extent count validation
xfs: simplify xfs_bmap_punch_delalloc_range
In any case, d_splice_alias() does not drop reference of original
dentry.
Signed-off-by: "Yan, Zheng" <zyan@redhat.com>
Reviewed-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
-----BEGIN PGP SIGNATURE-----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=fCdm
-----END PGP SIGNATURE-----
Merge tag 'for-4.18-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux
Pull btrfs fixes from David Sterba:
"Two regression fixes and an incorrect error value propagation fix from
'rename exchange'"
* tag 'for-4.18-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux:
Btrfs: fix return value on rename exchange failure
btrfs: fix invalid-free in btrfs_extent_same
Btrfs: fix physical offset reported by fiemap for inline extents
In __xfs_ag_resv_init we incorrectly calculate the amount by which to
decrease fdblocks when reserving blocks for the rmapbt. Because rmapbt
allocations do not decrease fdblocks, we must decrease fdblocks by the
entire size of the requested reservation in order to achieve our goal of
always having enough free blocks to satisfy an rmapbt expansion.
This is in contrast to the refcountbt/finobt, which /do/ subtract from
fdblocks whenever they allocate a block. For this allocation type we
preserve the existing behavior where we decrease fdblocks only by the
requested reservation minus the size of the existing tree.
This fixes the problem where the available block counts reported by
statfs change across a remount if there had been an rmapbt size change
since mount time.
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Allison Henderson <allison.henderson@oracle.com>
If a user asks us to zero_range part of a file, the end of the range is
EOF, and not aligned to a page boundary, invoke writeback of the EOF
page to ensure that the post-EOF part of the page is zeroed. This
ensures that we don't expose stale memory contents via mmap, if in a
clumsy manner.
Found by running generic/127 when it runs zero_range and mapread at EOF
one after the other.
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Allison Henderson <allison.henderson@oracle.com>
In commit 8ad560d256 ("xfs: strengthen rtalloc query range checks")
we strengthened the input parameter checks in the rtbitmap range query
function, but introduced an off-by-one error in the process. The call
to xfs_rtfind_forw deals with the high key being rextents, but we clamp
the high key to rextents - 1. This causes the returned results to stop
one block short of the end of the rtdev, which is incorrect.
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Allison Henderson <allison.henderson@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Initialize the extent count field of the high key so that when we use
the high key to synthesize an 'unknown owner' record (i.e. used space
record) at the end of the queried range we have a field with which to
compute rm_blockcount. This is not strictly necessary because the
synthesizer never uses the rm_blockcount field, but we can shut up the
static code analysis anyway.
Coverity-id: 1437358
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Allison Henderson <allison.henderson@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Zorro Lang reports that generic/485 blows an assert on a filesystem with
512 byte blocks. The test tries to fallocate a post-eof extent at the
maximum file size and calls insert range to shift the extents right by
two blocks. On a 512b block filesystem this causes startoff to overflow
the 54-bit startoff field, leading to the assert.
Therefore, always check the rightmost extent to see if it would overflow
prior to invoking the insert range machinery.
Reported-by: zlang@redhat.com
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=200137
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Allison Henderson <allison.henderson@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
If we somehow end up with a filesystem that has fewer free blocks than
the blocks set aside to avoid ENOSPC deadlocks, it's possible that the
free space calculation in xfs_reserve_blocks will spit out a negative
number (because percpu_counter_sum returns s64). We fail to notice
this negative number and set fdblks_delta to it. Now we increment
fdblocks(!) and the unsigned type of m_resblks means that we end up
setting a ridiculously huge m_resblks reservation.
Avoid this comedy of errors by detecting the negative free space and
returning -ENOSPC.
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Allison Henderson <allison.henderson@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
In commit e89c041338 ("xfs: implement the GETFSMAP ioctl") we
created the ability to obtain empty transactions. These transactions
have no log or block reservations and therefore can't modify anything.
Since they're also NO_WRITECOUNT they can run while the fs is frozen,
so we don't need to WARN_ON about that usage.
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Allison Henderson <allison.henderson@oracle.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
If we failed during a rename exchange operation after starting/joining a
transaction, we would end up replacing the return value, stored in the
local 'ret' variable, with the return value from btrfs_end_transaction().
So this could end up returning 0 (success) to user space despite the
operation having failed and aborted the transaction, because if there are
multiple tasks having a reference on the transaction at the time
btrfs_end_transaction() is called by the rename exchange, that function
returns 0 (otherwise it returns -EIO and not the original error value).
So fix this by not overwriting the return value on error after getting
a transaction handle.
Fixes: cdd1fedf82 ("btrfs: add support for RENAME_EXCHANGE and RENAME_WHITEOUT")
CC: stable@vger.kernel.org # 4.9+
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
-----BEGIN PGP SIGNATURE-----
iQEzBAABCAAdFiEEq1nRK9aeMoq1VSgcnJ2qBz9kQNkFAlssqQcACgkQnJ2qBz9k
QNl2XwgAhtb2LvBhWKh3OkBVczICgc9eQho03KiHJkEcR1OCkgjOJhVBDrQmJbBa
tAuMmUcnTpLJG8CI5TyR0G4hNbttE2LuTu+6RV67hXOjhiYAQ5P9wYLyUqfZf/01
myrPEewr9qqx3h2htqufiLQIyO1M4FeM37VqdH7vZhQOb+B+FUw7JB9a/HbCpNh/
7NUDf2GbLtLjK+2Xh0ttXvfWjgbLjC4wMmaPaa5+Nabn+URtvX9aHgQ/dYrOjQ16
7oD5K5x3k3sOT6Ix7xRGLHgE6Xl6MlTtxpyt5ldb96RwWO/GAuMhSCBd14nS2hmx
fEx5N2vbs3v8Ux+ZdMauzAKZI6Fz2g==
=oFo+
-----END PGP SIGNATURE-----
Merge tag 'for_v4.18-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs
Pull udf, quota, ext2 fixes from Jan Kara:
"UDF:
- fix an oops due to corrupted disk image
- two small cleanups
quota:
- a fixfor lru handling
- cleanup
ext2:
- a warning about a deprecated mount option"
* tag 'for_v4.18-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs:
udf: Drop unused arguments of udf_delete_aext()
udf: Provide function for calculating dir entry length
udf: Detect incorrect directory size
ext2: add warning when specifying nocheck option
quota: Cleanup list iteration in dqcache_shrink_scan()
quota: reclaim least recently used dquots
When a corrupt inode is detected during xfs_iflush_cluster, we can
get a shutdown ASSERT failure like this:
XFS (pmem1): Metadata corruption detected at xfs_symlink_shortform_verify+0x5c/0xa0, inode 0x86627 data fork
XFS (pmem1): Unmount and run xfs_repair
XFS (pmem1): xfs_do_force_shutdown(0x8) called from line 3372 of file fs/xfs/xfs_inode.c. Return address = ffffffff814f4116
XFS (pmem1): Corruption of in-memory data detected. Shutting down filesystem
XFS (pmem1): xfs_do_force_shutdown(0x1) called from line 222 of file fs/xfs/libxfs/xfs_defer.c. Return address = ffffffff814a8a88
XFS (pmem1): xfs_do_force_shutdown(0x1) called from line 222 of file fs/xfs/libxfs/xfs_defer.c. Return address = ffffffff814a8ef9
XFS (pmem1): Please umount the filesystem and rectify the problem(s)
XFS: Assertion failed: xfs_isiflocked(ip), file: fs/xfs/xfs_inode.h, line: 258
.....
Call Trace:
xfs_iflush_abort+0x10a/0x110
xfs_iflush+0xf3/0x390
xfs_inode_item_push+0x126/0x1e0
xfsaild+0x2c5/0x890
kthread+0x11c/0x140
ret_from_fork+0x24/0x30
Essentially, xfs_iflush_abort() has been called twice on the
original inode that that was flushed. This happens because the
inode has been flushed to teh buffer successfully via
xfs_iflush_int(), and so when another inode is detected as corrupt
in xfs_iflush_cluster, the buffer is marked stale and EIO, and
iodone callbacks are run on it.
Running the iodone callbacks walks across the original inode and
calls xfs_iflush_abort() on it. When xfs_iflush_cluster() returns
to xfs_iflush(), it runs the error path for that function, and that
calls xfs_iflush_abort() on the inode a second time, leading to the
above assert failure as the inode is not flush locked anymore.
This bug has been there a long time.
The simple fix would be to just avoid calling xfs_iflush_abort() in
xfs_iflush() if we've got a failure from xfs_iflush_cluster().
However, xfs_iflush_cluster() has magic delwri buffer handling that
means it may or may not have run IO completion on the buffer, and
hence sometimes we have to call xfs_iflush_abort() from
xfs_iflush(), and sometimes we shouldn't.
After reading through all the error paths and the delwri buffer
code, it's clear that the error handling in xfs_iflush_cluster() is
unnecessary. If the buffer is delwri, it leaves it on the delwri
list so that when the delwri list is submitted it sees a shutdown
fliesystem in xfs_buf_submit() and that marks the buffer stale, EIO
and runs IO completion. i.e. exactly what xfs+iflush_cluster() does
when it's not a delwri buffer. Further, marking a buffer stale
clears the _XBF_DELWRI_Q flag on the buffer, which means when
submission of the buffer occurs, it just skips over it and releases
it.
IOWs, the error handling in xfs_iflush_cluster doesn't need to care
if the buffer is already on a the delwri queue or not - it just
needs to mark the buffer stale, EIO and run completions. That means
we can just use the easy fix for xfs_iflush() to avoid the double
abort.
Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
When the inode is in extent format, it can't have more extents that
fit in the inode fork. We don't currenty check this, and so this
corruption goes unnoticed by the inode verifiers. This can lead to
crashes operating on invalid in-memory structures.
Attempts to access such a inode will now error out in the verifier
rather than allowing modification operations to proceed.
Reported-by: Wen Xu <wen.xu@gatech.edu>
Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
[darrick: fix a typedef, add some braces and breaks to shut up compiler warnings]
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Instead of using xfs_bmapi_read to find delalloc extents and then punch
them out using xfs_bunmapi, opencode the loop to iterate over the extents
and call xfs_bmap_del_extent_delay directly. This both simplifies the
code and reduces the number of extent tree lookups required.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Hightlights include:
Bugfixes:
- Fix an rcu deadlock in nfs_delegation_find_inode()
- Fix NFSv4 deadlocks due to not freeing the session slot in layoutget
- Don't send layoutreturn if the layout is already invalid
- Prevent duplicate XID allocation
- flexfiles: Don't tie up all the rpciod threads in resends
-----BEGIN PGP SIGNATURE-----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=tz0M
-----END PGP SIGNATURE-----
Merge tag 'nfs-for-4.18-2' of git://git.linux-nfs.org/projects/trondmy/linux-nfs
Pull NFS client bugfixes from Trond Myklebust:
"Hightlights include:
- fix an rcu deadlock in nfs_delegation_find_inode()
- fix NFSv4 deadlocks due to not freeing the session slot in
layoutget
- don't send layoutreturn if the layout is already invalid
- prevent duplicate XID allocation
- flexfiles: Don't tie up all the rpciod threads in resends"
* tag 'nfs-for-4.18-2' of git://git.linux-nfs.org/projects/trondmy/linux-nfs:
pNFS/flexfiles: Process writeback resends from nfsiod context as well
pNFS/flexfiles: Don't tie up all the rpciod threads in resends
sunrpc: Prevent duplicate XID allocation
pNFS: Don't send layoutreturn if the layout is already invalid
pNFS: Always free the session slot on error in nfs4_layoutget_handle_exception
NFS: Fix an rcu deadlock in nfs_delegation_find_inode()
If this condition ((BTRFS_I(src)->flags & BTRFS_INODE_NODATASUM) !=
(BTRFS_I(dst)->flags & BTRFS_INODE_NODATASUM))
is hit, we will go to free the uninitialized cmp.src_pages and
cmp.dst_pages.
Fixes: 67b07bd4be ("Btrfs: reuse cmp workspace in EXTENT_SAME ioctl")
Signed-off-by: Lu Fengqi <lufq.fnst@cn.fujitsu.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Commit 9d311e11fc ("Btrfs: fiemap: pass correct bytenr when
fm_extent_count is zero") introduced a regression where we no longer
report 0 as the physical offset for inline extents (and other extents
with a special block_start value). This is because it always sets the
variable used to report the physical offset ("disko") as em->block_start
plus some offset, and em->block_start has the value 18446744073709551614
((u64) -2) for inline extents.
This made the btrfs test 004 (from fstests) often fail, for example, for
a file with an inline extent we have the following items in the subvolume
tree:
item 101 key (418 INODE_ITEM 0) itemoff 11029 itemsize 160
generation 25 transid 38 size 1525 nbytes 1525
block group 0 mode 100666 links 1 uid 0 gid 0 rdev 0
sequence 0 flags 0x2(none)
atime 1529342058.461891730 (2018-06-18 18:14:18)
ctime 1529342058.461891730 (2018-06-18 18:14:18)
mtime 1529342058.461891730 (2018-06-18 18:14:18)
otime 1529342055.869892885 (2018-06-18 18:14:15)
item 102 key (418 INODE_REF 264) itemoff 11016 itemsize 13
index 25 namelen 3 name: fc7
item 103 key (418 EXTENT_DATA 0) itemoff 9470 itemsize 1546
generation 38 type 0 (inline)
inline extent data size 1525 ram_bytes 1525 compression 0 (none)
Then when test 004 invoked fiemap against the file it got a non-zero
physical offset:
$ filefrag -v /mnt/p0/d4/d7/fc7
Filesystem type is: 9123683e
File size of /mnt/p0/d4/d7/fc7 is 1525 (1 block of 4096 bytes)
ext: logical_offset: physical_offset: length: expected: flags:
0: 0.. 4095: 18446744073709551614.. 4093: 4096: last,not_aligned,inline,eof
/mnt/p0/d4/d7/fc7: 1 extent found
This resulted in the test failing like this:
btrfs/004 49s ... [failed, exit status 1]- output mismatch (see /home/fdmanana/git/hub/xfstests/results//btrfs/004.out.bad)
--- tests/btrfs/004.out 2016-08-23 10:17:35.027012095 +0100
+++ /home/fdmanana/git/hub/xfstests/results//btrfs/004.out.bad 2018-06-18 18:15:02.385872155 +0100
@@ -1,3 +1,10 @@
QA output created by 004
*** test backref walking
-*** done
+./tests/btrfs/004: line 227: [: 7.55578637259143e+22: integer expression expected
+ERROR: 7.55578637259143e+22 is not a valid numeric value.
+unexpected output from
+ /home/fdmanana/git/hub/btrfs-progs/btrfs inspect-internal logical-resolve -s 65536 -P 7.55578637259143e+22 /home/fdmanana/btrfs-tests/scratch_1
...
(Run 'diff -u tests/btrfs/004.out /home/fdmanana/git/hub/xfstests/results//btrfs/004.out.bad' to see the entire diff)
Ran: btrfs/004
The large number in scientific notation reported as an invalid numeric
value is the result from the filter passed to perl which multiplies the
physical offset by the block size reported by fiemap.
So fix this by ensuring the physical offset is always set to 0 when we
are processing an extent with a special block_start value.
Fixes: 9d311e11fc ("Btrfs: fiemap: pass correct bytenr when fm_extent_count is zero")
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Detect when a directory entry is (possibly partially) beyond directory
size and return EIO in that case since it means the filesystem is
corrupted. Otherwise directory operations can further corrupt the
directory and possibly also oops the kernel.
CC: Anatoly Trosinenko <anatoly.trosinenko@gmail.com>
CC: stable@vger.kernel.org
Reported-and-tested-by: Anatoly Trosinenko <anatoly.trosinenko@gmail.com>
Signed-off-by: Jan Kara <jack@suse.cz>
The option nocheck(nocheck/check=none) is useless but considering
backwards compatibility it's better to print warning for a while
before completely remove from the code.
This patch add proper warning message for option 'nocheck' and
remove unnecessary comment/function declaration which is used for
removed option 'check'.
Signed-off-by: Chengguang Xu <cgxu519@gmx.com>
Signed-off-by: Jan Kara <jack@suse.cz>
Use list_first_entry() and list_empty() instead of opencoded variants.
Reviewed-by: Matthew Wilcox <mawilcox@microsoft.com>
Signed-off-by: Jan Kara <jack@suse.cz>
The dquots in the free_dquots list are not reclaimed in LRU way.
put_dquot_last() puts entries to the tail and dqcache_shrink_scan()
frees from the tail. Free unreferenced dquots in LRU order because it
seems more reasonable than freeing most recently used.
Signed-off-by: Greg Thelen <gthelen@google.com>
Signed-off-by: Shakeel Butt <shakeelb@google.com>
Signed-off-by: Jan Kara <jack@suse.cz>
The rewrite of the cmdline fetching missed the fact that we used to also
return the final terminating NUL character of the last argument. I
hadn't noticed, and none of the tools I tested cared, but something
obviously must care, because Michal Kubecek noticed the change in
behavior.
Tweak the "find the end" logic to actually include the NUL character,
and once past the eend of argv, always start the strnlen() at the
expected (original) argument end.
This whole "allow people to rewrite their arguments in place" is a nasty
hack and requires that odd slop handling at the end of the argv array,
but it's our traditional model, so we continue to support it.
Repored-and-bisected-by: Michal Kubecek <mkubecek@suse.cz>
Reviewed-and-tested-by: Michal Kubecek <mkubecek@suse.cz>
Cc: Alexey Dobriyan <adobriyan@gmail.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Although the writeback resends are more robust than the reads, since they
are not immediately rescheduled by the same thread, we are better off
processing them in the same place as the reads.
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
We do not want to have rpciod threads perform recursive calls into the
RPC layer since that can deadlock. In particular, having to wait for
a layoutget can be nasty... We want rather to defer scheduling those
retries until we're in the rpc_release() callback, since that is
called from the nfsiod workqueue.
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
If the layout was invalidated due to a reboot, then don't try to send
a layoutreturn for it.
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Right now, we can call nfs_commit_inode() while holding the session slot,
which could lead to NFSv4 deadlocks. Ensure we only keep the slot if
the server returned a layout that we have to process.
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
-----BEGIN PGP SIGNATURE-----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=fEwn
-----END PGP SIGNATURE-----
Merge tag 'jfs-4.18' of git://github.com/kleikamp/linux-shaggy
Pull jfs fix from Dave Kleikamp:
"This fixes a too-small allocation in the xattr code"
* tag 'jfs-4.18' of git://github.com/kleikamp/linux-shaggy:
jfs: Fix inconsistency between memory allocation and ea_buf->max_size
-----BEGIN PGP SIGNATURE-----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=KTNX
-----END PGP SIGNATURE-----
Merge tag '4.18-rc1-more-smb3-fixes' of git://git.samba.org/sfrench/cifs-2.6
Pull cifs fixes from Steve French:
"Misc SMB3 fixes, including particularly important ones for signing,
some minor documentation and debug improvements and another posix
smb3.11 fix"
* tag '4.18-rc1-more-smb3-fixes' of git://git.samba.org/sfrench/cifs-2.6:
cifs: Fix invalid check in __cifs_calc_signature()
cifs: Use correct packet length in SMB2_TRANSFORM header
smb3: fix corrupt path in subdirs on smb311 with posix
smb3: do not display empty interface list
smb3: Fix mode on mkdir on smb311 mounts
cifs: Fix kernel oops when traceSMB is enabled
CIFS: dump every session iface info
CIFS: parse and store info on iface queries
CIFS: add iface info to struct cifs_ses
CIFS: complete PDU definitions for interface queries
CIFS: move default port definitions to cifsglob.h
cifs: Fix encryption/signing
cifs: update __smb_send_rqst() to take an array of requests
cifs: remove smb2_send_recv()
cifs: push rfc1002 generation down the stack
smb3: increase initial number of credits requested to allow write
cifs: minor documentation updates
cifs: add lease tracking to the cached root fid
smb3: note that smb3.11 posix extensions mount option is experimental
- can.rst: fix a footnote reference;
- crypto_engine.rst: Fix two parsing warnings;
- Fix a lot of broken references to Documentation/*;
- Improves the scripts/documentation-file-ref-check script,
in order to help detecting/fixing broken references,
preventing false-positives.
After this patch series, only 33 broken references to doc files are
detected by scripts/documentation-file-ref-check.
-----BEGIN PGP SIGNATURE-----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=/ozx
-----END PGP SIGNATURE-----
Merge tag 'docs-broken-links' of git://linuxtv.org/mchehab/experimental
Pull documentation fixes from Mauro Carvalho Chehab:
"This solves a series of broken links for files under Documentation,
and improves a script meant to detect such broken links (see
scripts/documentation-file-ref-check).
The changes on this series are:
- can.rst: fix a footnote reference;
- crypto_engine.rst: Fix two parsing warnings;
- Fix a lot of broken references to Documentation/*;
- improve the scripts/documentation-file-ref-check script, in order
to help detecting/fixing broken references, preventing
false-positives.
After this patch series, only 33 broken references to doc files are
detected by scripts/documentation-file-ref-check"
* tag 'docs-broken-links' of git://linuxtv.org/mchehab/experimental: (26 commits)
fix a series of Documentation/ broken file name references
Documentation: rstFlatTable.py: fix a broken reference
ABI: sysfs-devices-system-cpu: remove a broken reference
devicetree: fix a series of wrong file references
devicetree: fix name of pinctrl-bindings.txt
devicetree: fix some bindings file names
MAINTAINERS: fix location of DT npcm files
MAINTAINERS: fix location of some display DT bindings
kernel-parameters.txt: fix pointers to sound parameters
bindings: nvmem/zii: Fix location of nvmem.txt
docs: Fix more broken references
scripts/documentation-file-ref-check: check tools/*/Documentation
scripts/documentation-file-ref-check: get rid of false-positives
scripts/documentation-file-ref-check: hint: dash or underline
scripts/documentation-file-ref-check: add a fix logic for DT
scripts/documentation-file-ref-check: accept more wildcards at filenames
scripts/documentation-file-ref-check: fix help message
media: max2175: fix location of driver's companion documentation
media: v4l: fix broken video4linux docs locations
media: dvb: point to the location of the old README.dvb-usb file
...
-----BEGIN PGP SIGNATURE-----
iQEzBAABCAAdFiEEq1nRK9aeMoq1VSgcnJ2qBz9kQNkFAlsielwACgkQnJ2qBz9k
QNlN0Af/Q82iP3EqrT3w+CT7w0gER2su+Df2riDpo0/XYRQLxuyW+kYtLsQwovvB
Q7Tt+WTSO5OIqoJxwGMmd6VO5ICblhP+uHVC6+JlWy17DgccjwFBE/sUopxPqJaK
9utwXZhqqOEoikNpDABcptNnWVILRl0yppkQrVV/pKkyZFp2F8vO4roUHFFYkJJt
/uXJfLDQx6pBLTwqfQBFyiz0dCSsvCHUVnlw7Hu5JfE6xPtkMlk6F/M0Y0rvyEOg
8KmH5jUX/BXKIijg+ycOzS3CCdvm0UhrtiH5YWy4qGaI8eczT31Epfl08Sk8pvkv
n2rnxNnJP5sjPPNQhXvHJqy9qRCB6g==
=bLjN
-----END PGP SIGNATURE-----
Merge tag 'fsnotify_for_v4.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs
Pull fsnotify updates from Jan Kara:
"fsnotify cleanups unifying handling of different watch types.
This is the shortened fsnotify series from Amir with the last five
patches pulled out. Amir has modified those patches to not change
struct inode but obviously it's too late for those to go into this
merge window"
* tag 'fsnotify_for_v4.18-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/jack/linux-fs:
fsnotify: add fsnotify_add_inode_mark() wrappers
fanotify: generalize fanotify_should_send_event()
fsnotify: generalize send_to_group()
fsnotify: generalize iteration of marks by object type
fsnotify: introduce marks iteration helpers
fsnotify: remove redundant arguments to handle_event()
fsnotify: use type id to identify connector object type
Pull AFS updates from Al Viro:
"Assorted AFS stuff - ended up in vfs.git since most of that consists
of David's AFS-related followups to Christoph's procfs series"
* 'afs-proc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
afs: Optimise callback breaking by not repeating volume lookup
afs: Display manually added cells in dynamic root mount
afs: Enable IPv6 DNS lookups
afs: Show all of a server's addresses in /proc/fs/afs/servers
afs: Handle CONFIG_PROC_FS=n
proc: Make inline name size calculation automatic
afs: Implement network namespacing
afs: Mark afs_net::ws_cell as __rcu and set using rcu functions
afs: Fix a Sparse warning in xdr_decode_AFSFetchStatus()
proc: Add a way to make network proc files writable
afs: Rearrange fs/afs/proc.c to remove remaining predeclarations.
afs: Rearrange fs/afs/proc.c to move the show routines up
afs: Rearrange fs/afs/proc.c by moving fops and open functions down
afs: Move /proc management functions to the end of the file
Pull compat updates from Al Viro:
"Some biarch patches - getting rid of assorted (mis)uses of
compat_alloc_user_space().
Not much in that area this cycle..."
* 'work.compat' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
orangefs: simplify compat ioctl handling
signalfd: lift sigmask copyin and size checks to callers of do_signalfd4()
vmsplice(): lift importing iovec into vmsplice(2) and compat counterpart
Pull aio fixes from Al Viro:
"Assorted AIO followups and fixes"
* 'work.aio' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs:
eventpoll: switch to ->poll_mask
aio: only return events requested in poll_mask() for IOCB_CMD_POLL
eventfd: only return events requested in poll_mask()
aio: mark __aio_sigset::sigmask const
The following check would never evaluate to true:
> if (i == 0 && iov[0].iov_len <= 4)
Because 'i' always starts at 1.
This patch fixes it and also move the header checks outside the for loop
- which makes more sense.
Signed-off-by: Paulo Alcantara <palcantara@suse.de>
Signed-off-by: Steve French <stfrench@microsoft.com>
In smb3_init_transform_rq(), 'orig_len' was only counting the request
length, but forgot to count any data pages in the request.
Writing or creating files with the 'seal' mount option was broken.
In addition, do some code refactoring by exporting smb2_rqst_len() to
calculate the appropriate packet size and avoid duplicating the same
calculation all over the code.
The start of the io vector is either the rfc1002 length (4 bytes) or a
SMB2 header which is always > 4. Use this fact to check and skip the
rfc1002 length if requested.
Signed-off-by: Paulo Alcantara <palcantara@suse.de>
Reviewed-by: Aurelien Aptel <aaptel@suse.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
As files move around, their previous links break. Fix the
references for them.
Acked-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Acked-by: Jonathan Corbet <corbet@lwn.net>
As we move stuff around, some doc references are broken. Fix some of
them via this script:
./scripts/documentation-file-ref-check --fix
Manually checked that produced results are valid.
Acked-by: Matthias Brugger <matthias.bgg@gmail.com>
Acked-by: Takashi Iwai <tiwai@suse.de>
Acked-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Acked-by: Guenter Roeck <linux@roeck-us.net>
Acked-by: Miguel Ojeda <miguel.ojeda.sandonis@gmail.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Acked-by: Jonathan Corbet <corbet@lwn.net>
At the moment, afs_break_callbacks calls afs_break_one_callback() for each
separate FID it was given, and the latter looks up the volume individually
for each one.
However, this is inefficient if two or more FIDs have the same vid as we
could reuse the volume. This is complicated by cell aliasing whereby we
may have multiple cells sharing a volume and can therefore have multiple
callback interests for any particular volume ID.
At the moment afs_break_one_callback() scans the entire list of volumes
we're getting from a server and breaks the appropriate callback in every
matching volume, regardless of cell. This scan is done for every FID.
Optimise callback breaking by the following means:
(1) Sort the FID list by vid so that all FIDs belonging to the same volume
are clumped together.
This is done through the use of an indirection table as we cannot do
an insertion sort on the afs_callback_break array as we decode FIDs
into it as we subsequently also have to decode callback info into it
that corresponds by array index only.
We also don't really want to bubblesort afterwards if we can avoid it.
(2) Sort the server->cb_interests array by vid so that all the matching
volumes are grouped together. This permits the scan to stop after
finding a record that has a higher vid.
(3) When breaking FIDs, we try to keep server->cb_break_lock as long as
possible, caching the start point in the array for that volume group
as long as possible.
It might make sense to add another layer in that list and have a
refcounted volume ID anchor that has the matching interests attached
to it rather than being in the list. This would allow the lock to be
dropped without losing the cursor.
Signed-off-by: David Howells <dhowells@redhat.com>
Linus Torvalds