linux.git/fs/btrfs/tests, branch v5.4

Btrfs: fix selftests failure due to uninitialized i_mode in test inodes

2019-09-24T12:45:02+00:00

Some of the self tests create a test inode, setup some extents and then do
calls to btrfs_get_extent() to test that the corresponding extent maps
exist and are correct. However btrfs_get_extent(), since the 5.2 merge
window, now errors out when it finds a regular or prealloc extent for an
inode that does not correspond to a regular file (its ->i_mode is not
S_IFREG). This causes the self tests to fail sometimes, specially when
KASAN, slub_debug and page poisoning are enabled:

  $ modprobe btrfs
  modprobe: ERROR: could not insert 'btrfs': Invalid argument

  $ dmesg
  [ 9414.691648] Btrfs loaded, crc32c=crc32c-intel, debug=on, assert=on, integrity-checker=on, ref-verify=on
  [ 9414.692655] BTRFS: selftest: sectorsize: 4096  nodesize: 4096
  [ 9414.692658] BTRFS: selftest: running btrfs free space cache tests
  [ 9414.692918] BTRFS: selftest: running extent only tests
  [ 9414.693061] BTRFS: selftest: running bitmap only tests
  [ 9414.693366] BTRFS: selftest: running bitmap and extent tests
  [ 9414.696455] BTRFS: selftest: running space stealing from bitmap to extent tests
  [ 9414.697131] BTRFS: selftest: running extent buffer operation tests
  [ 9414.697133] BTRFS: selftest: running btrfs_split_item tests
  [ 9414.697564] BTRFS: selftest: running extent I/O tests
  [ 9414.697583] BTRFS: selftest: running find delalloc tests
  [ 9415.081125] BTRFS: selftest: running find_first_clear_extent_bit test
  [ 9415.081278] BTRFS: selftest: running extent buffer bitmap tests
  [ 9415.124192] BTRFS: selftest: running inode tests
  [ 9415.124195] BTRFS: selftest: running btrfs_get_extent tests
  [ 9415.127909] BTRFS: selftest: running hole first btrfs_get_extent test
  [ 9415.128343] BTRFS critical (device (efault)): regular/prealloc extent found for non-regular inode 256
  [ 9415.131428] BTRFS: selftest: fs/btrfs/tests/inode-tests.c:904 expected a real extent, got 0

This happens because the test inodes are created without ever initializing
the i_mode field of the inode, and neither VFS's new_inode() nor the btrfs
callback btrfs_alloc_inode() initialize the i_mode. Initialization of the
i_mode is done through the various callbacks used by the VFS to create
new inodes (regular files, directories, symlinks, tmpfiles, etc), which
all call btrfs_new_inode() which in turn calls inode_init_owner(), which
sets the inode's i_mode. Since the tests only uses new_inode() to create
the test inodes, the i_mode was never initialized.

This always happens on a VM I used with kasan, slub_debug and many other
debug facilities enabled. It also happened to someone who reported this
on bugzilla (on a 5.3-rc).

Fix this by setting i_mode to S_IFREG at btrfs_new_test_inode().

Fixes: 6bf9e4bd6a2778 ("btrfs: inode: Verify inode mode to avoid NULL pointer dereference")
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=204397
Signed-off-by: Filipe Manana 
Reviewed-by: Qu Wenruo 
Signed-off-by: David Sterba

btrfs: stop clearing EXTENT_DIRTY in inode I/O tree

2019-09-09T12:59:17+00:00

Since commit fee187d9d9dd ("Btrfs: do not set EXTENT_DIRTY along with
EXTENT_DELALLOC"), we never set EXTENT_DIRTY in inode->io_tree, so we
can simplify and stop trying to clear it.

Reviewed-by: Josef Bacik 
Signed-off-by: Omar Sandoval 
Reviewed-by: David Sterba 
Signed-off-by: David Sterba

Btrfs: make test_find_first_clear_extent_bit fail on incorrect results

2019-09-09T12:59:05+00:00

If any call to find_first_clear_extent_bit() returns an unexpected result,
the test should fail and not just print an error message, otherwise it
makes detection of regressions much harder to notice.

Fixes: 1eaebb341d2b41 ("btrfs: Don't trim returned range based on input value in find_first_clear_extent_bit")
Reviewed-by: Nikolay Borisov 
Signed-off-by: Filipe Manana 
Signed-off-by: David Sterba

Btrfs: fix memory leaks in the test test_find_first_clear_extent_bit

2019-09-09T12:59:05+00:00

The test creates an extent io tree and sets several ranges with the
CHUNK_ALLOCATED and CHUNK_TRIMMED bits, resulting in the allocation of
several extent state structures. However the test never clears those
ranges, resulting in memory leaks of the extent state structures.

This is detected when CONFIG_BTRFS_DEBUG is set once we remove the
btrfs module (rmmod btrfs):

[57399.787918] BTRFS: state leak: start 67108864 end 75497471 state 1 in tree 1 refs 1
[57399.790155] BTRFS: state leak: start 33554432 end 67108863 state 33 in tree 1 refs 1
[57399.791941] BTRFS: state leak: start 1048576 end 4194303 state 33 in tree 1 refs 1
[57399.793753] BTRFS: state leak: start 67108864 end 75497471 state 1 in tree 1 refs 1
[57399.795188] BTRFS: state leak: start 33554432 end 67108863 state 33 in tree 1 refs 1
[57399.796453] BTRFS: state leak: start 1048576 end 4194303 state 33 in tree 1 refs 1
[57399.797765] BTRFS: state leak: start 67108864 end 75497471 state 1 in tree 1 refs 1
[57399.799049] BTRFS: state leak: start 33554432 end 67108863 state 33 in tree 1 refs 1
[57399.800142] BTRFS: state leak: start 1048576 end 4194303 state 33 in tree 1 refs 1
[57399.801126] BTRFS: state leak: start 67108864 end 75497471 state 1 in tree 1 refs 1
[57399.802106] BTRFS: state leak: start 33554432 end 67108863 state 33 in tree 1 refs 1
[57399.803119] BTRFS: state leak: start 1048576 end 4194303 state 33 in tree 1 refs 1
[57399.804153] BTRFS: state leak: start 67108864 end 75497471 state 1 in tree 1 refs 1
[57399.805196] BTRFS: state leak: start 33554432 end 67108863 state 33 in tree 1 refs 1
[57399.806191] BTRFS: state leak: start 1048576 end 4194303 state 33 in tree 1 refs 1

The start and end offsets reported correspond exactly to the ranges
used by the test.

So fix that by clearing all the ranges when the test finishes.

Fixes: 1eaebb341d2b41 ("btrfs: Don't trim returned range based on input value in find_first_clear_extent_bit")
Signed-off-by: Filipe Manana 
Signed-off-by: David Sterba

btrfs: move basic block_group definitions to their own header

2019-09-09T12:59:03+00:00

This is prep work for moving all of the block group cache code into its
own file.

Signed-off-by: Josef Bacik 
Reviewed-by: David Sterba 
[ minor comment updates ]
Signed-off-by: David Sterba

btrfs: Remove leftover of in-band dedupe

2019-09-09T12:58:59+00:00

It's unlikely in-band dedupe is going to land so just remove any
leftovers - dedupe.h header as well as the 'dedupe' parameter to
btrfs_set_extent_delalloc.

Signed-off-by: Nikolay Borisov 
Reviewed-by: David Sterba 
Signed-off-by: David Sterba

Merge branch 'work.mount0' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

2019-07-19T17:42:02+00:00

Pull vfs mount updates from Al Viro:
 "The first part of mount updates.

  Convert filesystems to use the new mount API"

* 'work.mount0' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (63 commits)
  mnt_init(): call shmem_init() unconditionally
  constify ksys_mount() string arguments
  don't bother with registering rootfs
  init_rootfs(): don't bother with init_ramfs_fs()
  vfs: Convert smackfs to use the new mount API
  vfs: Convert selinuxfs to use the new mount API
  vfs: Convert securityfs to use the new mount API
  vfs: Convert apparmorfs to use the new mount API
  vfs: Convert openpromfs to use the new mount API
  vfs: Convert xenfs to use the new mount API
  vfs: Convert gadgetfs to use the new mount API
  vfs: Convert oprofilefs to use the new mount API
  vfs: Convert ibmasmfs to use the new mount API
  vfs: Convert qib_fs/ipathfs to use the new mount API
  vfs: Convert efivarfs to use the new mount API
  vfs: Convert configfs to use the new mount API
  vfs: Convert binfmt_misc to use the new mount API
  convenience helper: get_tree_single()
  convenience helper get_tree_nodev()
  vfs: Kill sget_userns()
  ...

btrfs: Evaluate io_tree in find_lock_delalloc_range()

2019-07-04T15:26:17+00:00

Simplification.  No point passing the tree variable when it can be
evaluated from inode. The tests now use the io_tree from btrfs_inode as
opposed to creating one.

Signed-off-by: Goldwyn Rodrigues 
Reviewed-by: David Sterba 
Signed-off-by: David Sterba

btrfs: tests: add locks around add_extent_mapping

2019-07-01T11:35:03+00:00

There are no concerns about locking during the selftests so the locks
are not necessary, but following patches will add lockdep assertions to
add_extent_mapping so this is needed in tests too.

Reviewed-by: Nikolay Borisov 
Signed-off-by: David Sterba

btrfs: Don't trim returned range based on input value in find_first_clear_extent_bit

2019-07-01T11:35:02+00:00

Currently find_first_clear_extent_bit always returns a range whose
starting value is >= passed 'start'. This implicit trimming behavior is
somewhat subtle and an implementation detail.

Instead, this patch modifies the function such that now it always
returns the range which contains passed 'start' and has the given bits
unset. This range could either be due to presence of existing records
which contains 'start' but have the bits unset or because there are no
records that contain the given starting offset.

This patch also adds test cases which cover find_first_clear_extent_bit
since they were missing up until now.

Reviewed-by: Qu Wenruo 
Signed-off-by: Nikolay Borisov 
Signed-off-by: David Sterba