Add --enable-experimental configure option that allows to merge unstable
features or partially implemented features. This is supposed to help
features that need time to settle, tweak output or formatting and would
require constant rebases and would have limited exposure to users that
could provide feedback.
If this is enabled, the following may change without notice:
- the whole feature may disappear in the future
- new command names could change or relocate to other subcommands
- parameter names
- output formatting
- json output
Signed-off-by: David Sterba <dsterba@suse.com>
For the incoming extra page size support for subpage (sectorsize <
PAGE_SIZE) cases, the support for metadata will be a critical point.
Currently for subpage support, we require 64K page size, so that no
matter whatever the nodesize is, it will be contained inside one page.
And we will reject any tree block which crosses page boundary.
But for other page size, especially 16K page size, we must support
nodesize differently.
For nodesize < PAGE_SIZE, we will have the same requirement (tree blocks
can't cross page boundary).
While for nodesize >= PAGE_SIZE, we will require the tree blocks to be
page aligned.
To support such feature, we will make btrfs-check to reports more
subpage related warnings for metadata.
This patch will report any tree block which is not nodesize aligned as a
warning.
Existing mkfs/convert has already make sure all new tree blocks are
nodesize aligned, this is just for older converted filesystems.
Signed-off-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
For fsck tests, we check the subpage warnings for each type 1 test, but
such type 1 tests are mostly read-only tests, and one of the test will
trigger new subpage related warnings (fsck/018).
For subpage related warnings, what we really care are write operations,
including mkfs, btrfs-convert and repair, not those read-only tests.
So skip the subpage warning check for fsck type 1 tests to prevent false
alert of later more strict subpage warnings.
Signed-off-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
There are two types of test cases:
- Type 1 (without test.sh)
- Type 2 (test.sh, mostly will override check_image())
For Type 2 tests, we check subpage related warnings of btrfs-check, but
didn't check it for Type 1 test cases.
In fact, Type 1 test cases are more important, as they involve repair,
which can generate new tree blocks, and we want to make sure such new
tree blocks won't cause subpage related warnings.
This patch will add the extra check for Type 1 test cases.
And it will make sure the subpage related warnings are really from this
test case, to prevent false alerts.
Signed-off-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
The declarations do not correspond to any command descriptors as they
have been moved to other command groups.
Signed-off-by: David Sterba <dsterba@suse.com>
Add new option --uuid to convert with the following modes:
- 'copy' -- copy the UUID from the source filesystem
- 'new' -- (default) generate new UUID
- UUID -- a valid UUID that will be set on btrfs
Based on patch from Florian
https://lore.kernel.org/linux-btrfs/1357486331-4615-2-git-send-email-falbrechtskirchinger@gmail.com/
and ported to contemporary codebase.
Issue: #391
Signed-off-by: David Sterba <dsterba@suse.com>
There is a recent report of ghost subvolumes where such subvolumes has
no ROOT_REF/BACKREF, and 0 root ref. But without an orphan item, thus
kernel won't queue them for cleanup.
Such ghost subvolumes are just here to take up space, and no way to
delete them except by btrfs check, which will try to fix the problem by
adding orphan item.
There is a kernel patch submitted to allow btrfs to detect such ghost
subvolumes and queue them for cleanup.
But btrfs-progs will not continue to call the ioctl if it can't find the
full subvolume path.
Thus this patch will loose the restriction by allowing btrfs-progs to
continue to call the ioctl even if it can't grab the subvolume path.
Signed-off-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
[HICCUP]
There is a bug report that mkfs.btrfs -R free-space-tree still makes
kernel to try to cleanup the v1 space cache:
# mkfs.btrfs -R free-space-tree -f /dev/test/scratch1
# mount /dev/test/scratch1 /mnt/btrfs
# dmesg | grep cleaning
BTRFS info (device dm-6): cleaning free space cache v1
[CAUSE]
By default, mkfs.btrfs will set super cache generation to (u64)-1, which
will inform kernel that the v1 space cache is invalid, needs to
regenerate it.
But for free space cache tree, kernel will set super cache generation to
0, to indicate v1 space cache is not in use.
This means, even we enabled free space tree with all the RO compatible
bits and new tree, as long as super cache generation is not 0, kernel
still consider the fs has some invalid v1 space cache, and will try to
remove them.
[FIX]
This is not a big deal, but to make the "-R free-space-tree" to really
work as kernel, we also need to set super cache generation to 0.
Reported-by: Chris Murphy <lists@colorremedies.com>
Link: https://lore.kernel.org/linux-btrfs/CAJCQCtSvgzyOnxtrqQZZirSycEHp+g0eDH5c+Kw9mW=PgxuXmw@mail.gmail.com/
Reviewed-by: Anand Jain <anand.jain@oracle.com>
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
The defaults for rotational devices are to enable DUP for metadata, this
does not yet work on zoned devices and fails with messages like:
Zoned: /dev/sda: host-managed device detected, setting zoned feature
ERROR: cannot use RAID/DUP profile in zoned mode
The RAID/DUP support will be implemented in the future and we don't want
to change the defaults to revert them back again. This makes it a bit
awkward for the user until this happens, so at least print a hint what
to do that single/single must be set manually.
Link: https://lore.kernel.org/linux-btrfs/20210706091922.38650-1-johannes.thumshirn@wdc.com/
Reported-by: Damien Le Moal <damien.lemoal@wdc.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Make sure btrfs check can detect such problem. Right now we have no way
to fix it yet.
Reviewed-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Linux VFS doesn't allow directory to have hard links, thus for btrfs
on-disk directory inode items, their nlinks should never go beyond 1.
Lowmem mode already has the check and will report it without problem.
Only original mode needs this update.
Reported-by: Pepperpoint <pepperpoint@mb.ardentcoding.com>
Link: https://lore.kernel.org/linux-btrfs/162648632340.7.1932907459648384384.10178178@mb.ardentcoding.com/
Reviewed-by: Su Yue <l@damenly.su>
Signed-off-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Subvolume iteration has a window between when we get a root ref (with
BTRFS_IOC_TREE_SEARCH or BTRFS_IOC_GET_SUBVOL_ROOTREF) and when we look
up the path of the parent directory (with BTRFS_IOC_INO_LOOKUP{,_USER}).
If the subvolume is moved or deleted and its old parent directory is
deleted during that window, then BTRFS_IOC_INO_LOOKUP{,_USER} will fail
with ENOENT. The iteration will then fail with ENOENT as well.
We originally encountered this bug with an application that called
`btrfs subvolume show` (which iterates subvolumes to find snapshots) in
parallel with other threads creating and deleting subvolumes. It can be
reproduced almost instantly with the included test cases.
Subvolume iteration should be robust against concurrent modifications to
subvolumes. So, if a subvolume's parent directory no longer exists, just
skip the subvolume, as it must have been deleted or moved elsewhere.
Reviewed-by: Neal Gompa <ngompa13@gmail.com>
Signed-off-by: Omar Sandoval <osandov@fb.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Run ci/ci-build-musl to verify build of current branch works in
environment with musl libc. Also works for a given branch name.
Signed-off-by: David Sterba <dsterba@suse.com>
There is some code that using NAME_MAX but it doesn't include header
that is defined. This patch adds a line that includes linux/limits.h
which defines NAME_MAX.
Issue: #386
Issue: #385
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: Sidong Yang <realwakka@gmail.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Currently v1 space cache clearing will delete one cache inode just in
one transaction, and then start a new transaction to delete the next
inode.
This is far from efficient and can make the already slow v1 space cache
deleting even slower, as large fs has tons of cache inodes to delete.
This patch will speed up the process by batching up to 16 inode deletion
into one transaction.
A quick benchmark of deleting 702 v1 space cache inodes would look like
this:
Unpatched: 4.898s
Patched: 0.087s
Which is obviously a big win.
Reported-by: Joshua <joshua@mailmag.net>
Link: https://lore.kernel.org/linux-btrfs/0b4cf70fc883e28c97d893a3b2f81b11@mailmag.net/
Signed-off-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Since v4.19, btrfs-progs has full write support to free space tree, the
out-of-date warning in btrfs(5) has already confused some end user.
Update the content to avoid further confusion.
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Make the libbtrfsutil library and license more visible in the overview.
Drop link to travis-ci.org CI as it's not used anymore.
Signed-off-by: David Sterba <dsterba@suse.com>
In btrfs_sb_io(), blk_zone_report is used for getting information about
zones. But it is not freed if code goes in usual path. This patch frees
the variable just after it used.
Reviewed-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: Naohiro Aota <naohiro.aota@wdc.com>
Signed-off-by: Sidong Yang <realwakka@gmail.com>
Signed-off-by: David Sterba <dsterba@suse.com>
check_running_fs_exclop() can return 1 when exclop is changed to "none"
The ret is set by the return value of the select() operation. Checking
the exclusive op changes just the exclop variable while ret is still
set to 1.
Set ret = 0 if exclop is set to BTRFS_EXCL_NONE or BTRFS_EXCL_UNKNOWN.
Remove unnecessary continue statement at the end of the block.
The command appears to have executed, but does not. This was found when
balance which typically reports chunks relocated did not print anything
on screen.
Signed-off-by: Goldwyn Rodrigues <rgoldwyn@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
The Used and Free should be together, while all the device information
is in the first section.
Example:
Overall:
Device size: 128.00GiB
Device allocated: 24.00GiB
Device unallocated: 104.00GiB
Device missing: 0.00B
Device zone unusable: 5.13MiB
Device zone size: 256.00MiB
Used: 213.33MiB
Free (estimated): 111.79GiB (min: 111.79GiB)
Free (statfs, df): 111.79GiB
Data ratio: 1.00
Metadata ratio: 1.00
Global reserve: 25.58MiB (used: 16.00KiB)
Multiple profiles: no
Signed-off-by: David Sterba <dsterba@suse.com>
Read device size and print it in the overall overview in zoned mode. The
total unusable size is there so the zone size is complementing it. It's
read from the first device assuming that kernel mandates that all
devices have the same zone size.
Example:
Overall:
Device size: 128.00GiB
Device allocated: 24.00GiB
Device unallocated: 104.00GiB
Device missing: 0.00B
Used: 213.33MiB
Device zone unusable: 5.13MiB
Device zone size: 256.00MiB
Free (estimated): 111.79GiB (min: 111.79GiB)
Free (statfs, df): 111.79GiB
Data ratio: 1.00
Metadata ratio: 1.00
Global reserve: 25.58MiB (used: 16.00KiB)
Multiple profiles: no
Signed-off-by: David Sterba <dsterba@suse.com>
Sysfs hides the zone size of a block device in the queue/chunk_sectors
file, so add a helper that will read it for us when given the short
device name (that can be found in FSID/devices).
Signed-off-by: David Sterba <dsterba@suse.com>
There are several directories in /sys/fs/btrfs/FSID that contain more
than one file/directory. Add a helper to open the directory so that the
file descriptor can be used for fdopendir.
Signed-off-by: David Sterba <dsterba@suse.com>
If there's CONFIG_CRYPTO_SHA256=y in /proc/config.gz and no line with
'sha256' in /proc/modules, then the mount will use the generic
implementation.
After 'modprobe sha256' there's 'sha256_ssse3' in /proc/modules and the
sysfs checksum file would show e.g. 'sha256-avx2'.
Signed-off-by: David Sterba <dsterba@suse.com>
Print number of stripes for striped profiles in device usage commands.
It helps to see profiles easily. The output is like below.
/dev/vdc, ID: 1
Device size: 1.00GiB
Device slack: 0.00B
Data,RAID0/2: 912.62MiB
Data,RAID0/3: 912.62MiB
Metadata,RAID1: 102.38MiB
System,RAID1: 8.00MiB
Unallocated: 1.00MiB
Multiple lines can appear in case a balance conversion process was
interrupted or if there's been a new device added and new data written
to the full stripe.
Issue: #372
Signed-off-by: Sidong Yang <realwakka@gmail.com>
Signed-off-by: David Sterba <dsterba@suse.com>
The user transaction ioctls have been removed in kernel 4.17 by commit
7a5a07a81062 ("btrfs: Remove userspace transaction ioctls"), the
definitions are not relevant and can be removed.
The numbers could be reused in the future, eg. when there are no
maintained LTS kernels older than 4.19.
Signed-off-by: David Sterba <dsterba@suse.com>
There's another loop protection during scan of directory items. This can
fire under invalid conditions, ie. when there's no real endless loop.
The layout of b-tree items could trigger that and has been observed in
practice. This prevents automated restoration as it requires user
attention.
The number of loops is 1024, unjustified and without explanation. Errors
during traversing the leaves are checked so most errors would be caught.
A real loop in the directory items would require some crafting and would
not happen on a normal filesystem.
Issue: #59
Issue: #164
Issue: #237
Signed-off-by: David Sterba <dsterba@suse.com>
There's some kind of looping protection during copying file extents,
mostly likely to avoid endless loops on severely damaged filesystems.
This has been bothering users and makes restoring hard to automate as
it requires user attention to press 'y' or 'a'. This has not been well
documented either.
The number of loops is 1024 which looks arbitrary and hard to justify.
This eg. means that a file with many fragments hits the interactive
question more than once.
There are other checks when iterating the leaves that would catch
corruptions or other errors, so the looping would happen in some rare
and rather artificial case when some kind of loop exists inside the
extent items. This is not easily possible if possible at all as the
items do not directly reference other.
In case there's some genuine error found that would require a looping
protection, we'll add it or extend the checks to identify the loop.
Issue: #59
Issue: #164
Issue: #237
Signed-off-by: David Sterba <dsterba@suse.com>
