c501c9e3b8
At the time mkfs.btrfs the device id and stripe index gets reversed as shown in [1]. This patch helps to keep them in order at the time of mkfs.btrfs. And makes it easier to debug. Before: Stripe 0 is on devid 2; Stipe 1 is on devid 1; ./mkfs.btrfs -fq -draid1 -mraid1 /dev/sdb /dev/sdc && btrfs in dump-tree -d /dev/sdb | grep -A 10000 "chunk tree" | grep -B 10000 "device tree" | grep -A 13 "FIRST_CHUNK_TREE CHUNK_ITEM" item 2 key (FIRST_CHUNK_TREE CHUNK_ITEM 22020096) itemoff 15975 itemsize 112 length 8388608 owner 2 stripe_len 65536 type SYSTEM|RAID1 io_align 65536 io_width 65536 sector_size 4096 num_stripes 2 sub_stripes 0 stripe 0 devid 2 offset 1048576 dev_uuid d9fe51c4-6e79-446d-87ee-5be3184798cd stripe 1 devid 1 offset 22020096 dev_uuid 16f626ca-1a54-469b-ac7e-25623af884ab item 3 key (FIRST_CHUNK_TREE CHUNK_ITEM 30408704) itemoff 15863 itemsize 112 length 268435456 owner 2 stripe_len 65536 type METADATA|RAID1 io_align 65536 io_width 65536 sector_size 4096 num_stripes 2 sub_stripes 0 stripe 0 devid 2 offset 9437184 dev_uuid d9fe51c4-6e79-446d-87ee-5be3184798cd stripe 1 devid 1 offset 30408704 dev_uuid 16f626ca-1a54-469b-ac7e-25623af884ab item 4 key (FIRST_CHUNK_TREE CHUNK_ITEM 298844160) itemoff 15751 itemsize 112 length 314572800 owner 2 stripe_len 65536 type DATA|RAID1 io_align 65536 io_width 65536 sector_size 4096 num_stripes 2 sub_stripes 0 stripe 0 devid 2 offset 277872640 dev_uuid d9fe51c4-6e79-446d-87ee-5be3184798cd stripe 1 devid 1 offset 298844160 dev_uuid 16f626ca-1a54-469b-ac7e-25623af884ab After: Stripe 0 is on devid 1; Stripe 1 is on devid 2 ./mkfs.btrfs -fq -draid1 -mraid1 /dev/sdb /dev/sdc && btrfs in dump-tree -d /dev/sdb | grep -A 10000 "chunk tree" | grep -B 10000 "device tree" | grep -A 13 "FIRST_CHUNK_TREE CHUNK_ITEM" /dev/sdb: 8 bytes were erased at offset 0x00010040 (btrfs): 5f 42 48 52 66 53 5f 4d /dev/sdc: 8 bytes were erased at offset 0x00010040 (btrfs): 5f 42 48 52 66 53 5f 4d item 2 key (FIRST_CHUNK_TREE CHUNK_ITEM 22020096) itemoff 15975 itemsize 112 length 8388608 owner 2 stripe_len 65536 type SYSTEM|RAID1 io_align 65536 io_width 65536 sector_size 4096 num_stripes 2 sub_stripes 0 stripe 0 devid 1 offset 22020096 dev_uuid 6abc88fa-f42e-4f0c-9bc3-2225735e51d1 stripe 1 devid 2 offset 1048576 dev_uuid 73746d27-13a6-4d58-ac6b-48c90c31d94d item 3 key (FIRST_CHUNK_TREE CHUNK_ITEM 30408704) itemoff 15863 itemsize 112 length 268435456 owner 2 stripe_len 65536 type METADATA|RAID1 io_align 65536 io_width 65536 sector_size 4096 num_stripes 2 sub_stripes 0 stripe 0 devid 1 offset 30408704 dev_uuid 6abc88fa-f42e-4f0c-9bc3-2225735e51d1 stripe 1 devid 2 offset 9437184 dev_uuid 73746d27-13a6-4d58-ac6b-48c90c31d94d item 4 key (FIRST_CHUNK_TREE CHUNK_ITEM 298844160) itemoff 15751 itemsize 112 length 314572800 owner 2 stripe_len 65536 type DATA|RAID1 io_align 65536 io_width 65536 sector_size 4096 num_stripes 2 sub_stripes 0 stripe 0 devid 1 offset 298844160 dev_uuid 6abc88fa-f42e-4f0c-9bc3-2225735e51d1 stripe 1 devid 2 offset 277872640 dev_uuid 73746d27-13a6-4d58-ac6b-48c90c31d94d Signed-off-by: Anand Jain <anand.jain@oracle.com> Reviewed-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.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 --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.