Userspace utilities to manage btrfs filesystems
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Qu Wenruo b874fe6dda btrfs-progs: properly reserve metadata space for bgt conversion
There is a bug report [1] that btrfstune failed to convert to block
group tree.  The bug report shows some very weird call trace, mostly
fail at free space tree code.

One of the concern is the failed conversion may be caused by exhausted
metadata space.  In that case, we're doing quite some metadata
operations (one transaction to convert 64 block groups in one go).

But for each transaction we have only reserved the metadata for one
block group conversion (1 block for extent tree and 1 block for block
group tree, this excludes free space and extent tree operations, as they
should go global reserve).

Although we're not 100% sure about the failed conversion, at least we
should handle the metadata reservation correctly, by properly reserve
the needed space for the batch, and reduce the batch size just in case
there isn't much metadata space left.

[1] https://lore.kernel.org/linux-btrfs/3c93d0b5-a8cb-ebe3-f8d6-76ea6340f23e@gmail.com/

Signed-off-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
2023-10-10 19:15:35 +02:00
.github/workflows btrfs-progs: ci: run CI image tests in parallel 2023-10-02 18:05:38 +02:00
check btrfs-progs: properly cleanup aborted transactions in check 2023-10-03 01:11:57 +02:00
ci btrfs-progs: ci: add pull request worfklows to cleanup list 2023-10-03 01:11:57 +02:00
cmds btrfs-progs: dump-tree: allow using '-' for tree ids 2023-10-06 17:33:08 +02:00
common btrfs-progs: clean up includes, using include-what-you-use 2023-10-03 01:11:57 +02:00
config btrfs-progs: detect PCLMUL CPU support for accelerated crc32c 2023-09-13 00:38:50 +02:00
convert btrfs-progs: clean up includes, using include-what-you-use 2023-10-03 01:11:57 +02:00
crypto btrfs-progs: clean up includes, using include-what-you-use 2023-10-03 01:11:57 +02:00
Documentation btrfs-progs: docs: document squota 2023-10-03 01:11:54 +02:00
image btrfs-progs: clean up includes, using include-what-you-use 2023-10-03 01:11:57 +02:00
include btrfs-progs: kernel-shared: sync delayed-refs.[ch] 2023-10-03 01:11:57 +02:00
kernel-lib btrfs-progs: clean up includes, using include-what-you-use 2023-10-03 01:11:57 +02:00
kernel-shared btrfs-progs: remove stride length from on-disk format 2023-10-06 17:26:56 +02:00
libbtrfs Revert "libbtrfs: remove the support for fs without uuid tree" 2023-09-01 13:58:46 +02:00
libbtrfsutil btrfs-progs: sync DEV_INFO ioctl from kernel 2023-03-21 02:55:56 +01:00
mkfs btrfs-progs: clean up includes, using include-what-you-use 2023-10-03 01:11:57 +02:00
tests btrfs-progs: tests: disable log scanning after tests 2023-10-03 18:49:50 +02:00
tune btrfs-progs: properly reserve metadata space for bgt conversion 2023-10-10 19:15:35 +02:00
.editorconfig btrfs-progs: add basic .editorconfig 2020-08-31 17:01:02 +02:00
.gitignore btrfs-progs: remove btrfs-fragments 2023-09-01 12:11:59 +02:00
64-btrfs-dm.rules
64-btrfs-zoned.rules btrfs-progs: add udev rule to use mq-deadline on zoned btrfs 2022-02-01 18:41:43 +01:00
autogen.sh btrfs-progs: build: reuse config/ directory for m4 macros 2023-05-26 21:08:17 +02:00
btrfs-completion btrfs-progs: completion: include files in "du" completion 2023-04-26 12:39:16 +02:00
btrfs-corrupt-block.c btrfs-progs: clean up includes, using include-what-you-use 2023-10-03 01:11:57 +02:00
btrfs-crc.c
btrfs-debugfs
btrfs-find-root.c btrfs-progs: clean up includes, using include-what-you-use 2023-10-03 01:11:57 +02:00
btrfs-map-logical.c btrfs-progs: clean up includes, using include-what-you-use 2023-10-03 01:11:57 +02:00
btrfs-sb-mod.c btrfs-progs: build: use plain fcntl.h instead of sys/fcntl.h 2023-02-28 19:49:30 +01:00
btrfs-select-super.c btrfs-progs: clean up includes, using include-what-you-use 2023-10-03 01:11:57 +02:00
btrfs.c btrfs-progs: clean up includes, using include-what-you-use 2023-10-03 01:11:57 +02:00
CHANGES btrfs-progs: update CHANGES for 6.5.2 2023-10-03 19:37:41 +02:00
configure.ac btrfs-progs: detect PCLMUL CPU support for accelerated crc32c 2023-09-13 00:38:50 +02:00
COPYING
fsck.btrfs
inject-error btrfs-progs: add error injection helper script 2023-07-27 14:45:29 +02:00
INSTALL btrfs-progs: ci: build static binaries on oldest supported x86-64 architecture 2023-09-01 12:11:59 +02:00
Makefile btrfs-progs: move btrfs_record_file_extent and code into a new file 2023-10-03 01:11:56 +02:00
Makefile.extrawarn
Makefile.inc.in btrfs-progs: crypto: add PCL based implementation for crc32c 2023-08-28 17:24:24 +02:00
quick-test.c btrfs-progs: drop btrfs_init_path 2023-10-03 01:11:56 +02:00
README.md btrfs-progs: README: pull request workflow, minor fixes 2023-09-01 13:58:46 +02:00
show-blocks
VERSION Btrfs progs v6.5.2 2023-10-03 19:38:35 +02:00

Btrfs-progs

devel coverage codecov static release

Userspace utilities to manage btrfs filesystems. License: GPLv2.

Btrfs is a copy on write (COW) filesystem for Linux aimed at implementing advanced features while focusing on fault tolerance, repair and easy administration.

This repository hosts following utilities and also documentation:

See INSTALL for build instructions, tests/README.md for testing information and ci/README.md for CI information.

Release cycle

The major version releases are time-based and follow the cycle of the linux kernel releases. The cycle usually takes 2 months. A minor version releases may happen in the meantime if there are bug fixes or minor useful improvements queued.

The release tags are signed with a GPG key ID F2B4 1200 C54E FB30 380C 1756 C565 D5F9 D76D 583B, release tarballs are hosted at kernel.org. See file CHANGES or changelogs on RTD.

Reporting bugs

There are several ways, each has its own specifics and audience that can give feedback or work on a fix. The following list is sorted in the order of preference:

Development

The development takes place in the mailing list (linux-btrfs@vger.kernel.org) or at Github (issues, pull requests). Changes should be split to logical parts if possible, documentation may be included in the same patch as to code or separately.

The development model of btrfs-progs shares a lot with the kernel model. The

  • one logical change per patch: e.g. not mixing bugfixes, cleanups, features etc., sometimes it's not clear and will be usually pointed out during reviews
  • proper subject line: e.g. prefix with btrfs-progs: subpart, ... , descriptive yet not too long, see git log --oneline for some inspiration
  • proper changelog: the changelogs are often missing or lacking explanation why the change was made, or how is something broken, what are user-visible effects of the bug or the fix, how does an improvement help or the intended usecase
  • the Signed-off-by line is not mandatory for less significant changes (typos, documentation) but is desired as this documents who authored the change, you can read more about the The Developer's Certificate of Origin (chapter 11)
    • if you are not used to the signed-off style, your contributions won't be rejected just because of it's missing, the Author: tag will be added as a substitute in order to allow contributions without much bothering with formalities

Pull requests

The pull requests on Github may be used for code or documentation contributions. There are basic build checks enabled in the Github actions CI (first time contributors' pull requests may need an approval). The status can be checked at the workflow page.

  • open a PR against branches devel or master
  • push update to the same branch if you need to
  • close the PR in case it's wrong, a mistake or needs rework
  • if you're sure the changes don't need a CI build verification, please add [skip ci] to the changelog

Source code coding style and preferences follow the kernel coding style. You can find the editor settings in .editorconfig and use the EditorConfig plugin to let your editor use that, or update your editor settings manually.

Testing

The testing documentation can be found in tests/ and continuous integration/container images in ci/.

Documentation updates

Documentation fixes or updates do not need much explanation so sticking to the code rules in the previous section is not necessary. GitHub pull requests are OK, patches could be sent to me directly and not required to be also in the mailing list. Pointing out typos via IRC also works, although might get accidentally lost in the noise.

Documentation sources are written in RST and built by sphinx.

Third-party sources

Build dependencies are listed in INSTALL. Implementation of checksum/hash functions is provided by copies of the respective sources to avoid adding dependencies that would make deployments in rescue or limited environments harder. The implementations are portable and there are optimized versions for some architectures. Optionally it's possible to use libgcrypt, libsodium or libkcapi implementations.

Some other code is borrowed from kernel, eg. the raid5 tables or data structure implementation (list, rb-tree).

References