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Pull Ceph fixes from Sage Weil:
"First, there is a critical fix for the new primary-affinity function
that went into -rc1.
The second batch of patches from Zheng fix a range of problems with
directory fragmentation, readdir, and a few odds and ends for cephfs"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/sage/ceph-client:
ceph: reserve caps for file layout/lock MDS requests
ceph: avoid releasing caps that are being used
ceph: clear directory's completeness when creating file
libceph: fix non-default values check in apply_primary_affinity()
ceph: use fpos_cmp() to compare dentry positions
ceph: check directory's completeness before emitting directory entry
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Dan's "smatch" checker found out that there was a bug in the error path of the
'ubifs_remount_rw()' function. Instead of jumping to the "out" label which
cleans-things up, we just returned.
This patch fixes the problem.
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
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Pull aio fixes from Ben LaHaise:
"The first change from Anatol fixes a regression where io_destroy() no
longer waits for outstanding aios to complete. The second corrects a
memory leak in an error path for vectored aio operations.
Both of these bug fixes should be queued up for stable as well"
* git://git.kvack.org/~bcrl/aio-fixes:
aio: fix potential leak in aio_run_iocb().
aio: block io_destroy() until all context requests are completed
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iovec should be reclaimed whenever caller of rw_copy_check_uvector() returns,
but it doesn't hold when failure happens right after aio_setup_vectored_rw().
Fix that in a such way to avoid hairy goto.
Signed-off-by: Leon Yu <chianglungyu@gmail.com>
Signed-off-by: Benjamin LaHaise <bcrl@kvack.org>
Cc: stable@vger.kernel.org
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Signed-off-by: Yan, Zheng <zheng.z.yan@intel.com>
Reviewed-by: Sage Weil <sage@inktank.com>
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To avoid releasing caps that are being used, encode_inode_release()
should send implemented caps to MDS.
Signed-off-by: Yan, Zheng <zheng.z.yan@intel.com>
Reviewed-by: Sage Weil <sage@inktank.com>
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When creating a file, ceph_set_dentry_offset() puts the new dentry
at the end of directory's d_subdirs, then set the dentry's offset
based on directory's max offset. The offset does not reflect the
real postion of the dentry in directory. Later readdir reply from
MDS may change the dentry's position/offset. This inconsistency
can cause missing/duplicate entries in readdir result if readdir
is partly satisfied by dcache_readdir().
The fix is clear directory's completeness after creating/renaming
file. It prevents later readdir from using dcache_readdir().
Fixes: http://tracker.ceph.com/issues/8025
Signed-off-by: Yan, Zheng <zheng.z.yan@intel.com>
Reviewed-by: Sage Weil <sage@inktank.com>
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Signed-off-by: Yan, Zheng <zheng.z.yan@intel.com>
Reviewed-by: Sage Weil <sage@inktank.com>
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Signed-off-by: Yan, Zheng <zheng.z.yan@intel.com>
Reviewed-by: Sage Weil <sage@inktank.com>
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Pull btrfs fixes from Chris Mason.
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mason/linux-btrfs:
Btrfs: limit the path size in send to PATH_MAX
Btrfs: correctly set profile flags on seqlock retry
Btrfs: use correct key when repeating search for extent item
Btrfs: fix inode caching vs tree log
Btrfs: fix possible memory leaks in open_ctree()
Btrfs: avoid triggering bug_on() when we fail to start inode caching task
Btrfs: move btrfs_{set,clear}_and_info() to ctree.h
btrfs: replace error code from btrfs_drop_extents
btrfs: Change the hole range to a more accurate value.
btrfs: fix use-after-free in mount_subvol()
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Pull driver core fixes from Greg KH:
"Here are some kernfs fixes for 3.15-rc3 that resolve some reported
problems. Nothing huge, but all needed"
* tag 'driver-core-3.15-rc3' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core:
s390/ccwgroup: Fix memory corruption
kernfs: add back missing error check in kernfs_fop_mmap()
kernfs: fix a subdir count leak
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fs_path_ensure_buf is used to make sure our path buffers for
send are big enough for the path names as we construct them.
The buffer size is limited to 32K by the length field in
the struct.
But bugs in the path construction can end up trying to build
a huge buffer, and we'll do invalid memmmoves when the
buffer length field wraps.
This patch is step one, preventing the overflows.
Signed-off-by: Chris Mason <clm@fb.com>
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Pull file locking fixes from Jeff Layton:
"File locking related bugfixes for v3.15 (pile #2)
- fix for a long-standing bug in __break_lease that can cause soft
lockups
- renaming of file-private locks to "open file description" locks,
and the command macros to more visually distinct names
The fix for __break_lease is also in the pile of patches for which
Bruce sent a pull request, but I assume that your merge procedure will
handle that correctly.
For the other patches, I don't like the fact that we need to rename
this stuff at this late stage, but it should be settled now
(hopefully)"
* tag 'locks-v3.15-2' of git://git.samba.org/jlayton/linux:
locks: rename FL_FILE_PVT and IS_FILE_PVT to use "*_OFDLCK" instead
locks: rename file-private locks to "open file description locks"
locks: allow __break_lease to sleep even when break_time is 0
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Pull nfsd bugfixes from Bruce Fields:
"Three small nfsd bugfixes (including one locks.c fix for a bug
triggered only from nfsd).
Jeff's patches are for long-existing problems that became easier to
trigger since the addition of vfs delegation support"
* 'for-3.15' of git://linux-nfs.org/~bfields/linux:
Revert "nfsd4: fix nfs4err_resource in 4.1 case"
nfsd: set timeparms.to_maxval in setup_callback_client
locks: allow __break_lease to sleep even when break_time is 0
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While updating how mmap enabled kernfs files are handled by lockdep,
9b2db6e18945 ("sysfs: bail early from kernfs_file_mmap() to avoid
spurious lockdep warning") inadvertently dropped error return check
from kernfs_file_mmap(). The intention was just dropping "if
(ops->mmap)" check as the control won't reach the point if the mmap
callback isn't implemented, but I mistakenly removed the error return
check together with it.
This led to Xorg crash on i810 which was reported and bisected to the
commit and then to the specific change by Tobias.
Signed-off-by: Tejun Heo <tj@kernel.org>
Reported-and-bisected-by: Tobias Powalowski <tobias.powalowski@googlemail.com>
Tested-by: Tobias Powalowski <tobias.powalowski@googlemail.com>
References: http://lkml.kernel.org/g/533D01BD.1010200@googlemail.com
Cc: stable <stable@vger.kernel.org> # 3.14
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Currently kernfs_link_sibling() increates parent->dir.subdirs before
adding the node into parent's chidren rb tree.
Because it is possible that kernfs_link_sibling() couldn't find
a suitable slot and bail out, this leads to a mismatch between
elevated subdir count with actual children node numbers.
This patches fix this problem, by moving the subdir accouting
after the actual addtion happening.
Signed-off-by: Jianyu Zhan <nasa4836@gmail.com>
Acked-by: Tejun Heo <tj@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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If we had to retry on the profiles seqlock (due to a concurrent write), we
would set bits on the input flags that corresponded both to the current
profile and to previous values of the profile.
Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com>
Signed-off-by: Chris Mason <clm@fb.com>
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If skinny metadata is enabled and our first tree search fails to find a
skinny extent item, we may repeat a tree search for a "fat" extent item
(if the previous item in the leaf is not the "fat" extent we're looking
for). However we were not setting the new key's objectid to the right
value, as we previously used the same key variable to peek at the previous
item in the leaf, which has a different objectid. So just set the right
objectid to avoid modifying/deleting a wrong item if we repeat the tree
search.
Signed-off-by: Filipe David Borba Manana <fdmanana@gmail.com>
Signed-off-by: Chris Mason <clm@fb.com>
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Currently, with inode cache enabled, we will reuse its inode id immediately
after unlinking file, we may hit something like following:
|->iput inode
|->return inode id into inode cache
|->create dir,fsync
|->power off
An easy way to reproduce this problem is:
mkfs.btrfs -f /dev/sdb
mount /dev/sdb /mnt -o inode_cache,commit=100
dd if=/dev/zero of=/mnt/data bs=1M count=10 oflag=sync
inode_id=`ls -i /mnt/data | awk '{print $1}'`
rm -f /mnt/data
i=1
while [ 1 ]
do
mkdir /mnt/dir_$i
test1=`stat /mnt/dir_$i | grep Inode: | awk '{print $4}'`
if [ $test1 -eq $inode_id ]
then
dd if=/dev/zero of=/mnt/dir_$i/data bs=1M count=1 oflag=sync
echo b > /proc/sysrq-trigger
fi
sleep 1
i=$(($i+1))
done
mount /dev/sdb /mnt
umount /dev/sdb
btrfs check /dev/sdb
We fix this problem by adding unlinked inode's id into pinned tree,
and we can not reuse them until committing transaction.
Cc: stable@vger.kernel.org
Signed-off-by: Miao Xie <miaox@cn.fujitsu.com>
Signed-off-by: Wang Shilong <wangsl.fnst@cn.fujitsu.com>
Signed-off-by: Chris Mason <clm@fb.com>
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Fix possible memory leaks in the following error handling paths:
read_tree_block()
btrfs_recover_log_trees
btrfs_commit_super()
btrfs_find_orphan_roots()
btrfs_cleanup_fs_roots()
Signed-off-by: Wang Shilong <wangsl.fnst@cn.fujitsu.com>
Signed-off-by: Chris Mason <clm@fb.com>
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When running stress test(including snapshots,balance,fstress), we trigger
the following BUG_ON() which is because we fail to start inode caching task.
[ 181.131945] kernel BUG at fs/btrfs/inode-map.c:179!
[ 181.137963] invalid opcode: 0000 [#1] SMP
[ 181.217096] CPU: 11 PID: 2532 Comm: btrfs Not tainted 3.14.0 #1
[ 181.240521] task: ffff88013b621b30 ti: ffff8800b6ada000 task.ti: ffff8800b6ada000
[ 181.367506] Call Trace:
[ 181.371107] [<ffffffffa036c1be>] btrfs_return_ino+0x9e/0x110 [btrfs]
[ 181.379191] [<ffffffffa038082b>] btrfs_evict_inode+0x46b/0x4c0 [btrfs]
[ 181.387464] [<ffffffff810b5a70>] ? autoremove_wake_function+0x40/0x40
[ 181.395642] [<ffffffff811dc5fe>] evict+0x9e/0x190
[ 181.401882] [<ffffffff811dcde3>] iput+0xf3/0x180
[ 181.408025] [<ffffffffa03812de>] btrfs_orphan_cleanup+0x1ee/0x430 [btrfs]
[ 181.416614] [<ffffffffa03a6abd>] btrfs_mksubvol.isra.29+0x3bd/0x450 [btrfs]
[ 181.425399] [<ffffffffa03a6cd6>] btrfs_ioctl_snap_create_transid+0x186/0x190 [btrfs]
[ 181.435059] [<ffffffffa03a6e3b>] btrfs_ioctl_snap_create_v2+0xeb/0x130 [btrfs]
[ 181.444148] [<ffffffffa03a9656>] btrfs_ioctl+0xf76/0x2b90 [btrfs]
[ 181.451971] [<ffffffff8117e565>] ? handle_mm_fault+0x475/0xe80
[ 181.459509] [<ffffffff8167ba0c>] ? __do_page_fault+0x1ec/0x520
[ 181.467046] [<ffffffff81185b35>] ? do_mmap_pgoff+0x2f5/0x3c0
[ 181.474393] [<ffffffff811d4da8>] do_vfs_ioctl+0x2d8/0x4b0
[ 181.481450] [<ffffffff811d5001>] SyS_ioctl+0x81/0xa0
[ 181.488021] [<ffffffff81680b69>] system_call_fastpath+0x16/0x1b
We should avoid triggering BUG_ON() here, instead, we output warning messages
and clear inode_cache option.
Signed-off-by: Wang Shilong <wangsl.fnst@cn.fujitsu.com>
Signed-off-by: Chris Mason <clm@fb.com>
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Signed-off-by: Wang Shilong <wangsl.fnst@cn.fujitsu.com>
Signed-off-by: Chris Mason <clm@fb.com>
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There's a case which clone does not handle and used to BUG_ON instead,
(testcase xfstests/btrfs/035), now returns EINVAL. This error code is
confusing to the ioctl caller, as it normally signifies errorneous
arguments.
Change it to ENOPNOTSUPP which allows a fall back to copy instead of
clone. This does not affect the common reflink operation.
Signed-off-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Chris Mason <clm@fb.com>
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Commit 3ac0d7b96a268a98bd474cab8bce3a9f125aaccf fixed the btrfs expanding
write problem but the hole punched is sometimes too large for some
iovec, which has unmapped data ranges.
This patch will change to hole range to a more accurate value using the
counts checked by the write check routines.
Reported-by: Al Viro <viro@ZenIV.linux.org.uk>
Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
Signed-off-by: Chris Mason <clm@fb.com>
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File-private locks have been re-christened as "open file description"
locks. Finish the symbol name cleanup in the internal implementation.
Signed-off-by: Jeff Layton <jlayton@redhat.com>
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File-private locks have been merged into Linux for v3.15, and *now*
people are commenting that the name and macro definitions for the new
file-private locks suck.
...and I can't even disagree. The names and command macros do suck.
We're going to have to live with these for a long time, so it's
important that we be happy with the names before we're stuck with them.
The consensus on the lists so far is that they should be rechristened as
"open file description locks".
The name isn't a big deal for the kernel, but the command macros are not
visually distinct enough from the traditional POSIX lock macros. The
glibc and documentation folks are recommending that we change them to
look like F_OFD_{GETLK|SETLK|SETLKW}. That lessens the chance that a
programmer will typo one of the commands wrong, and also makes it easier
to spot this difference when reading code.
This patch makes the following changes that I think are necessary before
v3.15 ships:
1) rename the command macros to their new names. These end up in the uapi
headers and so are part of the external-facing API. It turns out that
glibc doesn't actually use the fcntl.h uapi header, but it's hard to
be sure that something else won't. Changing it now is safest.
2) make the the /proc/locks output display these as type "OFDLCK"
Cc: Michael Kerrisk <mtk.manpages@gmail.com>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Carlos O'Donell <carlos@redhat.com>
Cc: Stefan Metzmacher <metze@samba.org>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Frank Filz <ffilzlnx@mindspring.com>
Cc: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Jeff Layton <jlayton@redhat.com>
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Pull ext4 fixes from Ted Ts'o:
"These are regression and bug fixes for ext4.
We had a number of new features in ext4 during this merge window
(ZERO_RANGE and COLLAPSE_RANGE fallocate modes, renameat, etc.) so
there were many more regression and bug fixes this time around. It
didn't help that xfstests hadn't been fully updated to fully stress
test COLLAPSE_RANGE until after -rc1"
* tag 'ext4_for_linus_stable' of git://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4: (31 commits)
ext4: disable COLLAPSE_RANGE for bigalloc
ext4: fix COLLAPSE_RANGE failure with 1KB block size
ext4: use EINVAL if not a regular file in ext4_collapse_range()
ext4: enforce we are operating on a regular file in ext4_zero_range()
ext4: fix extent merging in ext4_ext_shift_path_extents()
ext4: discard preallocations after removing space
ext4: no need to truncate pagecache twice in collapse range
ext4: fix removing status extents in ext4_collapse_range()
ext4: use filemap_write_and_wait_range() correctly in collapse range
ext4: use truncate_pagecache() in collapse range
ext4: remove temporary shim used to merge COLLAPSE_RANGE and ZERO_RANGE
ext4: fix ext4_count_free_clusters() with EXT4FS_DEBUG and bigalloc enabled
ext4: always check ext4_ext_find_extent result
ext4: fix error handling in ext4_ext_shift_extents
ext4: silence sparse check warning for function ext4_trim_extent
ext4: COLLAPSE_RANGE only works on extent-based files
ext4: fix byte order problems introduced by the COLLAPSE_RANGE patches
ext4: use i_size_read in ext4_unaligned_aio()
fs: disallow all fallocate operation on active swapfile
fs: move falloc collapse range check into the filesystem methods
...
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Once COLLAPSE RANGE is be disable for ext4 with bigalloc feature till finding
root-cause of problem. It will be enable with fixing that regression of
xfstest(generic 075 and 091) again.
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Ashish Sangwan <a.sangwan@samsung.com>
Reviewed-by: Lukas Czerner <lczerner@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
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When formatting with 1KB or 2KB(not aligned with PAGE SIZE) block
size, xfstests generic/075 and 091 are failing. The offset supplied to
function truncate_pagecache_range is block size aligned. In this
function start offset is re-aligned to PAGE_SIZE by rounding_up to the
next page boundary. Due to this rounding up, old data remains in the
page cache when blocksize is less than page size and start offset is
not aligned with page size. In case of collapse range, we need to
align start offset to page size boundary by doing a round down
operation instead of round up.
Signed-off-by: Namjae Jeon <namjae.jeon@samsung.com>
Signed-off-by: Ashish Sangwan <a.sangwan@samsung.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
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A va_list needs to be copied in case it needs to be used twice.
Thanks to Hugh for debugging this issue, leading to various panics.
Tested:
lpq84:~# echo "|/foobar12345 %h %h %h %h %h %h %h %h %h %h %h %h %h %h %h %h %h %h %h %h" >/proc/sys/kernel/core_pattern
'produce_core' is simply : main() { *(int *)0 = 1;}
lpq84:~# ./produce_core
Segmentation fault (core dumped)
lpq84:~# dmesg | tail -1
[ 614.352947] Core dump to |/foobar12345 lpq84 lpq84 lpq84 lpq84 lpq84 lpq84 lpq84 lpq84 lpq84 lpq84 lpq84 lpq84 lpq84 lpq84 lpq84 lpq84 lpq84 lpq84 lpq84 (null) pipe failed
Notice the last argument was replaced by a NULL (we were lucky enough to
not crash, but do not try this on your production machine !)
After fix :
lpq83:~# echo "|/foobar12345 %h %h %h %h %h %h %h %h %h %h %h %h %h %h %h %h %h %h %h %h" >/proc/sys/kernel/core_pattern
lpq83:~# ./produce_core
Segmentation fault
lpq83:~# dmesg | tail -1
[ 740.800441] Core dump to |/foobar12345 lpq83 lpq83 lpq83 lpq83 lpq83 lpq83 lpq83 lpq83 lpq83 lpq83 lpq83 lpq83 lpq83 lpq83 lpq83 lpq83 lpq83 lpq83 lpq83 lpq83 pipe failed
Fixes: 5fe9d8ca21cc ("coredump: cn_vprintf() has no reason to call vsnprintf() twice")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Diagnosed-by: Hugh Dickins <hughd@google.com>
Acked-by: Oleg Nesterov <oleg@redhat.com>
Cc: Neil Horman <nhorman@tuxdriver.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: stable@vger.kernel.org # 3.11+
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Pull cifs fixes from Steve French:
"A set of 5 small cifs fixes"
* 'for-next' of git://git.samba.org/sfrench/cifs-2.6:
cif: fix dead code
cifs: fix error handling cifs_user_readv
fs: cifs: remove unused variable.
Return correct error on query of xattr on file with empty xattrs
cifs: Wait for writebacks to complete before attempting write.
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Pull driver core fixes from Greg KH:
"Here are some driver core fixes for 3.15-rc2. Also in here are some
documentation updates, as well as an API removal that had to wait for
after -rc1 due to the cleanups coming into you from multiple developer
trees (this one and the PPC tree.)
All have been in linux next successfully"
* tag 'driver-core-3.15-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core:
drivers/base/dd.c incorrect pr_debug() parameters
Documentation: Update stable address in Chinese and Japanese translations
topology: Fix compilation warning when not in SMP
Chinese: add translation of io_ordering.txt
stable_kernel_rules: spelling/word usage
sysfs, driver-core: remove unused {sysfs|device}_schedule_callback_owner()
kernfs: protect lazy kernfs_iattrs allocation with mutex
fs: Don't return 0 from get_anon_bdev
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Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
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Signed-off-by: Jon Ernst <jonernst07@gmail.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
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There is a bug in ext4_ext_shift_path_extents() where if we actually
manage to merge a extent we would skip shifting the next extent. This
will result in in one extent in the extent tree not being properly
shifted.
This is causing failure in various xfstests tests using fsx or fsstress
with collapse range support. It will also cause file system corruption
which looks something like:
e2fsck 1.42.9 (4-Feb-2014)
Pass 1: Checking inodes, blocks, and sizes
Inode 20 has out of order extents
(invalid logical block 3, physical block 492938, len 2)
Clear? yes
...
when running e2fsck.
It's also very easily reproducible just by running fsx without any
parameters. I can usually hit the problem within a minute.
Fix it by increasing ex_start only if we're not merging the extent.
Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Reviewed-by: Namjae Jeon <namjae.jeon@samsung.com>
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Currently in ext4_collapse_range() and ext4_punch_hole() we're
discarding preallocation twice. Once before we attempt to do any changes
and second time after we're done with the changes.
While the second call to ext4_discard_preallocations() in
ext4_punch_hole() case is not needed, we need to discard preallocation
right after ext4_ext_remove_space() in collapse range case because in
the case we had to restart a transaction in the middle of removing space
we might have new preallocations created.
Remove unneeded ext4_discard_preallocations() ext4_punch_hole() and move
it to the better place in ext4_collapse_range()
Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
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We're already calling truncate_pagecache() before we attempt to do any
actual job so there is not need to truncate pagecache once more using
truncate_setsize() after we're finished.
Remove truncate_setsize() and replace it just with i_size_write() note
that we're holding appropriate locks.
Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
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Currently in ext4_collapse_range() when calling ext4_es_remove_extent() to
remove status extents we're passing (EXT_MAX_BLOCKS - punch_start - 1)
in order to remove all extents from start of the collapse range to the
end of the file. However this is wrong because we might miss the
possible extent covering the last block of the file.
Fix it by removing the -1.
Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Reviewed-by: Namjae Jeon <namjae.jeon@samsung.com>
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Currently we're passing -1 as lend argumnet for
filemap_write_and_wait_range() which is wrong since lend is signed type
so it would cause some confusion and we might not write_and_wait for the
entire range we're expecting to write.
Fix it by using LLONG_MAX instead.
Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
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We should be using truncate_pagecache() instead of
truncate_pagecache_range() in the collapse range because we're
truncating page cache from offset to the end of file.
truncate_pagecache() also get rid of the private COWed pages from the
range because we're going to shift the end of the file.
Signed-off-by: Lukas Czerner <lczerner@redhat.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
|
|
Since we're still limiting attributes to a page, the result here is that
a large getattr result will return NFS4ERR_REP_TOO_BIG/TOO_BIG_TO_CACHE
instead of NFS4ERR_RESOURCE.
Both error returns are wrong, and the real bug here is the arbitrary
limit on getattr results, fixed by as-yet out-of-tree patches. But at a
minimum we can make life easier for clients by sticking to one broken
behavior in released kernels instead of two....
Trond says:
one immediate consequence of this patch will be that NFSv4.1
clients will now report EIO instead of EREMOTEIO if they hit the
problem. That may make debugging a little less obvious.
Another consequence will be that if we ever do try to add client
side handling of NFS4ERR_REP_TOO_BIG, then we now have to deal
with the “handle existing buggy server” syndrome.
Reported-by: Trond Myklebust <trond.myklebust@primarydata.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
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|
...otherwise the logic in the timeout handling doesn't work correctly.
Spotted-by: Trond Myklebust <trond.myklebust@primarydata.com>
Cc: stable@vger.kernel.org
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
|
|
A fl->fl_break_time of 0 has a special meaning to the lease break code
that basically means "never break the lease". knfsd uses this to ensure
that leases don't disappear out from under it.
Unfortunately, the code in __break_lease can end up passing this value
to wait_event_interruptible as a timeout, which prevents it from going
to sleep at all. This causes __break_lease to spin in a tight loop and
causes soft lockups.
Fix this by ensuring that we pass a minimum value of 1 as a timeout
instead.
Cc: <stable@vger.kernel.org>
Cc: J. Bruce Fields <bfields@fieldses.org>
Reported-by: Terry Barnaby <terry1@beam.ltd.uk>
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
|
|
This issue was found by Coverity (CID 1202536)
This proposes a fix for a statement that creates dead code.
The "rc < 0" statement is within code that is run
with "rc > 0".
It seems like "err < 0" was meant to be used here.
This way, the error code is returned by the function.
Signed-off-by: Michael Opdenacker <michael.opdenacker@free-electrons.com>
Acked-by: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Steve French <smfrench@gmail.com>
|
|
Coverity says:
*** CID 1202537: Dereference after null check (FORWARD_NULL)
/fs/cifs/file.c: 2873 in cifs_user_readv()
2867 cur_len = min_t(const size_t, len - total_read, cifs_sb->rsize);
2868 npages = DIV_ROUND_UP(cur_len, PAGE_SIZE);
2869
2870 /* allocate a readdata struct */
2871 rdata = cifs_readdata_alloc(npages,
2872 cifs_uncached_readv_complete);
>>> CID 1202537: Dereference after null check (FORWARD_NULL)
>>> Comparing "rdata" to null implies that "rdata" might be null.
2873 if (!rdata) {
2874 rc = -ENOMEM;
2875 goto error;
2876 }
2877
2878 rc = cifs_read_allocate_pages(rdata, npages);
...when we "goto error", rc will be non-zero, and then we end up trying
to do a kref_put on the rdata (which is NULL). Fix this by replacing
the "goto error" with a "break".
Reported-by: <scan-admin@coverity.com>
Signed-off-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <smfrench@gmail.com>
|
|
xfstests generic/004 reproduces an ilock deadlock using the tmpfile
interface when selinux is enabled. This occurs because
xfs_create_tmpfile() takes the ilock and then calls d_tmpfile(). The
latter eventually calls into xfs_xattr_get() which attempts to get the
lock again. E.g.:
xfs_io D ffffffff81c134c0 4096 3561 3560 0x00000080
ffff8801176a1a68 0000000000000046 ffff8800b401b540 ffff8801176a1fd8
00000000001d5800 00000000001d5800 ffff8800b401b540 ffff8800b401b540
ffff8800b73a6bd0 fffffffeffffffff ffff8800b73a6bd8 ffff8800b5ddb480
Call Trace:
[<ffffffff8177f969>] schedule+0x29/0x70
[<ffffffff81783a65>] rwsem_down_read_failed+0xc5/0x120
[<ffffffffa05aa97f>] ? xfs_ilock_attr_map_shared+0x1f/0x50 [xfs]
[<ffffffff813b3434>] call_rwsem_down_read_failed+0x14/0x30
[<ffffffff810ed179>] ? down_read_nested+0x89/0xa0
[<ffffffffa05aa7f2>] ? xfs_ilock+0x122/0x250 [xfs]
[<ffffffffa05aa7f2>] xfs_ilock+0x122/0x250 [xfs]
[<ffffffffa05aa97f>] xfs_ilock_attr_map_shared+0x1f/0x50 [xfs]
[<ffffffffa05701d0>] xfs_attr_get+0x90/0xe0 [xfs]
[<ffffffffa0565e07>] xfs_xattr_get+0x37/0x50 [xfs]
[<ffffffff8124842f>] generic_getxattr+0x4f/0x70
[<ffffffff8133fd9e>] inode_doinit_with_dentry+0x1ae/0x650
[<ffffffff81340e0c>] selinux_d_instantiate+0x1c/0x20
[<ffffffff813351bb>] security_d_instantiate+0x1b/0x30
[<ffffffff81237db0>] d_instantiate+0x50/0x70
[<ffffffff81237e85>] d_tmpfile+0xb5/0xc0
[<ffffffffa05add02>] xfs_create_tmpfile+0x362/0x410 [xfs]
[<ffffffffa0559ac8>] xfs_vn_tmpfile+0x18/0x20 [xfs]
[<ffffffff81230388>] path_openat+0x228/0x6a0
[<ffffffff810230f9>] ? sched_clock+0x9/0x10
[<ffffffff8105a427>] ? kvm_clock_read+0x27/0x40
[<ffffffff8124054f>] ? __alloc_fd+0xaf/0x1f0
[<ffffffff8123101a>] do_filp_open+0x3a/0x90
[<ffffffff817845e7>] ? _raw_spin_unlock+0x27/0x40
[<ffffffff8124054f>] ? __alloc_fd+0xaf/0x1f0
[<ffffffff8121e3ce>] do_sys_open+0x12e/0x210
[<ffffffff8121e4ce>] SyS_open+0x1e/0x20
[<ffffffff8178eda9>] system_call_fastpath+0x16/0x1b
xfs_vn_tmpfile() also fails to initialize security on the newly created
inode.
Pull the d_tmpfile() call up into xfs_vn_tmpfile() after the transaction
has been committed and the inode unlocked. Also, initialize security on
the inode based on the parent directory provided via the tmpfile call.
Signed-off-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Dave Chinner <david@fromorbit.com>
|
|
When testing exhaustion of dm snapshots, the following appeared
with CONFIG_DEBUG_OBJECTS_FREE enabled:
ODEBUG: free active (active state 0) object type: work_struct hint: xfs_buf_iodone_work+0x0/0x1d0 [xfs]
indicating that we'd freed a buffer which still had a pending reference,
down this path:
[ 190.867975] [<ffffffff8133e6fb>] debug_check_no_obj_freed+0x22b/0x270
[ 190.880820] [<ffffffff811da1d0>] kmem_cache_free+0xd0/0x370
[ 190.892615] [<ffffffffa02c5924>] xfs_buf_free+0xe4/0x210 [xfs]
[ 190.905629] [<ffffffffa02c6167>] xfs_buf_rele+0xe7/0x270 [xfs]
[ 190.911770] [<ffffffffa034c826>] xfs_trans_read_buf_map+0x7b6/0xac0 [xfs]
At issue is the fact that if IO fails in xfs_buf_iorequest,
we'll queue completion unconditionally, and then call
xfs_buf_rele; but if IO failed, there are no IOs remaining,
and xfs_buf_rele will free the bp while work is still queued.
Fix this by not scheduling completion if the buffer has
an error on it; run it immediately. The rest is only comment
changes.
Thanks to dchinner for spotting the root cause.
Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
|
|
We negate the error value being returned from a generic function
incorrectly. The code path that it is running in returned negative
errors, so there is no need to negate it to get the correct error
signs here.
This was uncovered by generic/019.
Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Dave Chinner <david@fromorbit.com>
|
|
And interesting situation can occur if a log IO error occurs during
the unmount of a filesystem. The cases reported have the same
signature - the update of the superblock counters fails due to a log
write IO error:
XFS (dm-16): xfs_do_force_shutdown(0x2) called from line 1170 of file fs/xfs/xfs_log.c. Return address = 0xffffffffa08a44a1
XFS (dm-16): Log I/O Error Detected. Shutting down filesystem
XFS (dm-16): Unable to update superblock counters. Freespace may not be correct on next mount.
XFS (dm-16): xfs_log_force: error 5 returned.
XFS (¿-¿¿¿): Please umount the filesystem and rectify the problem(s)
It can be seen that the last line of output contains a corrupt
device name - this is because the log and xfs_mount structures have
already been freed by the time this message is printed. A kernel
oops closely follows.
The issue is that the shutdown is occurring in a separate IO
completion thread to the unmount. Once the shutdown processing has
started and all the iclogs are marked with XLOG_STATE_IOERROR, the
log shutdown code wakes anyone waiting on a log force so they can
process the shutdown error. This wakes up the unmount code that
is doing a synchronous transaction to update the superblock
counters.
The unmount path now sees all the iclogs are marked with
XLOG_STATE_IOERROR and so never waits on them again, knowing that if
it does, there will not be a wakeup trigger for it and we will hang
the unmount if we do. Hence the unmount runs through all the
remaining code and frees all the filesystem structures while the
xlog_iodone() is still processing the shutdown. When the log
shutdown processing completes, xfs_do_force_shutdown() emits the
"Please umount the filesystem and rectify the problem(s)" message,
and xlog_iodone() then aborts all the objects attached to the iclog.
An iclog that has already been freed....
The real issue here is that there is no serialisation point between
the log IO and the unmount. We have serialisations points for log
writes, log forces, reservations, etc, but we don't actually have
any code that wakes for log IO to fully complete. We do that for all
other types of object, so why not iclogbufs?
Well, it turns out that we can easily do this. We've got xfs_buf
handles, and that's what everyone else uses for IO serialisation.
i.e. bp->b_sema. So, lets hold iclogbufs locked over IO, and only
release the lock in xlog_iodone() when we are finished with the
buffer. That way before we tear down the iclog, we can lock and
unlock the buffer to ensure IO completion has finished completely
before we tear it down.
Signed-off-by: Dave Chinner <dchinner@redhat.com>
Tested-by: Mike Snitzer <snitzer@redhat.com>
Tested-by: Bob Mastors <bob.mastors@solidfire.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
|
|
FSX has been detecting data corruption after to collapse range
calls. The key observation is that the offset of the last extent in
the file was not being shifted, and hence when the file size was
adjusted it was truncating away data because the extents handled
been correctly shifted.
Tracing indicated that before the collapse, the extent list looked
like:
....
ino 0x5788 state idx 6 offset 26 block 195904 count 10 flag 0
ino 0x5788 state idx 7 offset 39 block 195917 count 35 flag 0
ino 0x5788 state idx 8 offset 86 block 195964 count 32 flag 0
and after the shift of 2 blocks:
ino 0x5788 state idx 6 offset 24 block 195904 count 10 flag 0
ino 0x5788 state idx 7 offset 37 block 195917 count 35 flag 0
ino 0x5788 state idx 8 offset 86 block 195964 count 32 flag 0
Note that the last extent did not change offset. After the changing
of the file size:
ino 0x5788 state idx 6 offset 24 block 195904 count 10 flag 0
ino 0x5788 state idx 7 offset 37 block 195917 count 35 flag 0
ino 0x5788 state idx 8 offset 86 block 195964 count 30 flag 0
You can see that the last extent had it's length truncated,
indicating that we've lost data.
The reason for this is that the xfs_bmap_shift_extents() loop uses
XFS_IFORK_NEXTENTS() to determine how many extents are in the inode.
This, unfortunately, doesn't take into account delayed allocation
extents - it's a count of physically allocated extents - and hence
when the file being collapsed has a delalloc extent like this one
does prior to the range being collapsed:
....
ino 0x5788 state idx 4 offset 11 block 4503599627239429 count 1 flag 0
....
it gets the count wrong and terminates the shift loop early.
Fix it by using the in-memory extent array size that includes
delayed allocation extents to determine the number of extents on the
inode.
Signed-off-by: Dave Chinner <dchinner@redhat.com>
Tested-by: Brian Foster <bfoster@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Dave Chinner <david@fromorbit.com>
|
Linus Torvalds
Artem Bityutskiy
Leon Yu
Yan, Zheng
Chris Mason
Tejun Heo
Jianyu Zhan
Filipe Manana
Miao Xie
Wang Shilong
David Sterba
Qu Wenruo
Jeff Layton
Namjae Jeon
Eric Dumazet
Theodore Ts'o
jon ernst
Lukas Czerner
J. Bruce Fields
Michael Opdenacker
Brian Foster
Eric Sandeen
Dave Chinner