cf15c0eb0e
The function print_filesystem_usage_overall() prints the info on the basis of the r_*_chunk, r_*_used and l_*_chunks values computed for data, metadata and system chunks. For the RAID1/10/1C3/1C4/DUP these info are easily accessible from the info returned by load_space_info(). However for RAID5/6 this is not true because the ratios between the l_* and r_* values are not fixed but depend by the number of devices involved in the chunk. A new function called get_raid56_space_info() is created to compute the values r_*_chunk, and r_*_used for data, metadata and system chunks in case of a RAID5/6 profile. The r_*_chunk values are computed from the chunk_info array. In order to compute the r_*_used values, a new function get_raid56_logical_ratio() is created. This function computes the ratio l_*_used / l_*_chunk from the ioctl_space_args array. So we can get: 'r_*_used' = 'r_*_chunk' * 'l_*_used' / 'l_*_chunk' Even tough this is not mathematically true every time, it is true on "average" (for example if the RAID5 chunks use different number of disks the real values depend by which chunk contains the data). Signed-off-by: Goffredo Baroncelli <kreijack@inwind.it> Signed-off-by: David Sterba <dsterba@suse.com> |
||
|---|---|---|
| check | ||
| ci | ||
| cmds | ||
| common | ||
| convert | ||
| crypto | ||
| Documentation | ||
| image | ||
| kernel-lib | ||
| kernel-shared | ||
| libbtrfsutil | ||
| m4 | ||
| mkfs | ||
| tests | ||
| .gitignore | ||
| .gitlab-ci.yml | ||
| .travis.yml | ||
| 64-btrfs-dm.rules | ||
| Android.mk | ||
| androidcompat.h | ||
| autogen.sh | ||
| btrfs-completion | ||
| btrfs-corrupt-block.c | ||
| btrfs-crc.c | ||
| btrfs-debugfs | ||
| btrfs-find-root.c | ||
| btrfs-fragments.c | ||
| btrfs-list.c | ||
| btrfs-list.h | ||
| btrfs-map-logical.c | ||
| btrfs-sb-mod.c | ||
| btrfs-select-super.c | ||
| btrfs.c | ||
| btrfsck.h | ||
| btrfstune.c | ||
| CHANGES | ||
| configure.ac | ||
| COPYING | ||
| ctree.c | ||
| ctree.h | ||
| dir-item.c | ||
| disk-io.c | ||
| disk-io.h | ||
| extent_io.c | ||
| extent_io.h | ||
| extent-cache.c | ||
| extent-cache.h | ||
| extent-tree.c | ||
| file-item.c | ||
| file.c | ||
| find-root.c | ||
| find-root.h | ||
| free-space-cache.c | ||
| free-space-cache.h | ||
| fsck.btrfs | ||
| inode-item.c | ||
| inode-map.c | ||
| inode.c | ||
| INSTALL | ||
| ioctl.h | ||
| kerncompat.h | ||
| libbtrfs.sym | ||
| libbtrfsutil.sym | ||
| Makefile | ||
| Makefile.extrawarn | ||
| Makefile.inc.in | ||
| print-tree.c | ||
| print-tree.h | ||
| props.c | ||
| props.h | ||
| qgroup.c | ||
| qgroup.h | ||
| quick-test.c | ||
| random-test.c | ||
| README.md | ||
| repair.c | ||
| repair.h | ||
| root-tree.c | ||
| send-dump.c | ||
| send-dump.h | ||
| send-stream.c | ||
| send-stream.h | ||
| send-utils.c | ||
| send-utils.h | ||
| send.h | ||
| show-blocks | ||
| transaction.c | ||
| transaction.h | ||
| utils-lib.c | ||
| uuid-tree.c | ||
| VERSION | ||
| version.h.in | ||
| volumes.c | ||
| volumes.h | ||
Btrfs-progs 
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:
- btrfs — the main administration tool (manual page)
- mkfs.btrfs — utility to create the filesystem (manual page)
- all-in-one binary in the busybox style with mkfs.btrfs, btrfs-image and other tools built-in (standalone tools)
The C and python 3 bindings are provided by a LGPL library libbtrfsutil see libbtrfsutil/README.md for more.
See INSTALL for build instructions and tests/README.md for testing 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 wiki.
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:
- github issue tracker
- to the mailing list linux-btrfs@vger.kernel.org -- (not required to subscribe), beware that the mail might get overlooked in other traffic
- IRC (irc.freenode.net #btrfs) -- good for discussions eg. if a bug is already known, but reports could miss developers' attention
- bugzilla.kernel.org -- (requires registration), set the product to Filesystems and component Btrfs, please put 'btrfs-progs' into the subject so it's clear that it's not a kernel bug report
Development
The patch submissions, development or general discussions take place at linux-btrfs@vger.kernel.org mailinglist, subsciption is not required to post.
The GitHub pull requests will not be accepted directly, the preferred way is to send patches to the mailinglist instead. You can link to a branch in any git repository if the mails do not make it to the mailinglist or just for convenience (makes it easier to test).
The development model of btrfs-progs shares a lot with the kernel model. The github way is different in some ways. We, the upstream community, expect that the patches meet some criteria (often lacking in github contributions):
- one logical change per patch: eg. not mixing bugfixes, cleanups, features etc., sometimes it's not clear and will be usually pointed out during reviews
- proper subject line: eg. prefix with btrfs-progs: subpart, ... ,
descriptive yet not too long, see
git log --onelinefor 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: 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
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 mailinglist. Pointing out typos via IRC also works, although might get accidentally lost in the noise.
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 rescure or limited environments harder. The implementations are portable and not optimized for speed nor accelerated. Optionally it's possible to use libgcrypt or libsodium implementations.
- CRC32C: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/
- XXHASH: https://github.com/Cyan4973/xxHash
- SHA256: https://tools.ietf.org/html/rfc4634
- BLAKE2: https://github.com/BLAKE2/BLAKE2