c003709191
When debugging tree nodes with higher level, default DFS is not that reader friendly: file tree key (262 ROOT_ITEM 16) node 33800192 level 2 items 4 free 117 generation 16 owner 262 fs uuid 2d66d111-6850-4ca1-ae73-03f50adde41c chunk uuid 11141e63-2534-4d04-a0bd-c0531a8f5b88 key (256 INODE_ITEM 0) block 33771520 gen 15 key (330 EXTENT_DATA 0) block 33325056 gen 11 key (438 EXTENT_DATA 0) block 33652736 gen 15 key (654 EXTENT_DATA 0) block 33644544 gen 15 node 33771520 level 1 items 59 free 62 generation 15 owner 256 fs uuid 2d66d111-6850-4ca1-ae73-03f50adde41c chunk uuid 11141e63-2534-4d04-a0bd-c0531a8f5b88 key (256 INODE_ITEM 0) block 33787904 gen 15 key (256 DIR_ITEM 273597024) block 33124352 gen 9 [...] leaf 33787904 items 30 free space 1868 generation 15 owner 256 fs uuid 2d66d111-6850-4ca1-ae73-03f50adde41c chunk uuid 11141e63-2534-4d04-a0bd-c0531a8f5b88 item 0 key (256 INODE_ITEM 0) itemoff 3835 itemsize 160 generation 6 transid 15 size 12954 nbytes 0 block group 0 mode 40755 links 1 uid 0 gid 0 rdev 0 sequence 528 flags 0x0(none) atime 1565071339.446118888 (2019-08-06 14:02:19) ctime 1565071339.449452222 (2019-08-06 14:02:19) mtime 1565071339.449452222 (2019-08-06 14:02:19) otime 1565071338.89452221 (2019-08-06 14:02:18) item 1 key (256 INODE_REF 256) itemoff 3823 itemsize 12 index 0 namelen 2 name: .. item 2 key (256 DIR_ITEM 2487323) itemoff 3781 itemsize 42 location key (487 INODE_ITEM 0) type FILE transid 7 data_len 0 name_len 12 name: file_reg_115 [...] leaf 33124352 items 31 free space 1873 generation 9 owner 256 [...] However such DFS will show the leaves before nodes. If tracing things like drop_progress, we want to see nodes first then leaves. So change default behavior to BFS to life of developers easier. This affects 'btrfs inspect-internal dump-tree' output, the traversal order can be selected by --dfs or --bfs options. Signed-off-by: Qu Wenruo <wqu@suse.com> Signed-off-by: David Sterba <dsterba@suse.com> |
||
---|---|---|
Documentation | ||
check | ||
ci | ||
cmds | ||
common | ||
convert | ||
image | ||
kernel-lib | ||
kernel-shared | ||
libbtrfsutil | ||
m4 | ||
mkfs | ||
tests | ||
.gitignore | ||
.travis.yml | ||
64-btrfs-dm.rules | ||
Android.mk | ||
CHANGES | ||
COPYING | ||
INSTALL | ||
Makefile | ||
Makefile.extrawarn | ||
Makefile.inc.in | ||
README.md | ||
VERSION | ||
androidcompat.h | ||
autogen.sh | ||
backref.c | ||
backref.h | ||
bcp | ||
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 | ||
common-defs.h | ||
configure.ac | ||
ctree.c | ||
ctree.h | ||
delayed-ref.c | ||
delayed-ref.h | ||
dir-item.c | ||
disk-io.c | ||
disk-io.h | ||
extent-cache.c | ||
extent-cache.h | ||
extent-tree.c | ||
extent_io.c | ||
extent_io.h | ||
file-item.c | ||
file.c | ||
find-root.c | ||
find-root.h | ||
free-space-cache.c | ||
free-space-cache.h | ||
free-space-tree.c | ||
free-space-tree.h | ||
fsck.btrfs | ||
hash.h | ||
hasher.c | ||
inode-item.c | ||
inode-map.c | ||
inode.c | ||
ioctl-test.c | ||
ioctl.h | ||
kerncompat.h | ||
library-test.c | ||
print-tree.c | ||
print-tree.h | ||
props.c | ||
props.h | ||
qgroup-verify.c | ||
qgroup-verify.h | ||
qgroup.c | ||
qgroup.h | ||
quick-test.c | ||
random-test.c | ||
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.h.in | ||
volumes.c | ||
volumes.h |
README.md
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 --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: 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.