Commit Graph

300 Commits

Author SHA1 Message Date
Mark Harmstone
6a1d4adad1 btrfs-progs: mkfs: avoid dynamic allocation when doing --subvol
Reworks mkfs.btrfs --subvol so that dir and full_path in struct
rootdir_subvol are stored as arrays rather than pointers.

Signed-off-by: Mark Harmstone <maharmstone@fb.com>
2024-10-10 14:14:32 +10:30
Mark Harmstone
59f74c25af btrfs-progs: mkfs: rework --subvol CLI option
Change mkfs.btrfs --subvol so that instead of being of the form --subvol
DIR:FLAGS, it's instead --subvol MODIFIER:DIR, with MODIFIER being ro,
rw, default, or ro-default.

Signed-off-by: Mark Harmstone <maharmstone@fb.com>
2024-10-10 14:14:32 +10:30
Qu Wenruo
5ff9f6243e btrfs-progs: tests: add hardlink related tests for mkfs --subvol
This introduces two new cases:

- 3 hardlinks without any subvolume
  This should results 3 hard links inside the btrfs.

- 3 hardlinks, but a subvolume will split 2 of them
  Then the 2 inside the same subvolume should still report 2 nlinks,
  but the lone one inside the new subvolume can only report 1 nlink.

Signed-off-by: Qu Wenruo <wqu@suse.com>
2024-09-17 17:00:03 +02:00
Qu Wenruo
ef11574733 btrfs-progs: mkfs: add hard link support for --rootdir
The new hard link detection and creation support is done by maintaining
an rb tree with the following members:

- st_ino, st_dev
  This is to record the stat() report from the host fs.
  With this two, we can detect if it's really a hard link (st_dev
  determines one filesystem/subvolume, and st_ino determines the inode
  number inside the fs).

- root
  This is btrfs root pointer. This a special requirement for the recent
  introduced "--subvol" option.

  As we can have the following corner case:

  rootdir/
  |- foobar_hardlink1
  |- foobar_hardlink2
  |- subv/		<- To be a subvolume inside btrfs
     |- foobar_hardlink3

  In above case, on the host fs, `subv/` directory is just a regular
  directory, but in the new btrfs it will be a subvolume.

  In that case, `foobar_hardlink3` cannot be created as a hard link,
  but a new inode.

- st_nlink and found_nlink
  Records the original reported number of links, and the nlinks we
  created inside btrfs.
  This is recorded in case we created all hard links and can remove
  the entry early.

- btrfs_ino
  This is the inode number inside btrfs.

And since we can handle hard links safely, remove all the related
warnings, and add a new note for `--subvol` option, warning about the
case where we need to split hard links due to subvolume boundary.

Pull-request: #873
Signed-off-by: Qu Wenruo <wqu@suse.com>
2024-09-17 17:00:03 +02:00
Mark Harmstone
ec8a6b1536 btrfs-progs: mkfs: add ro flag to --subvol
Adds a flag to mkfs.btrfs --subvol to allow subvolumes to be created
readonly.

Signed-off-by: Mark Harmstone <maharmstone@fb.com>
2024-09-17 17:00:03 +02:00
Mark Harmstone
fa70df7e78 btrfs-progs: mkfs: add default flag to --subvol
Change --subvol that it can accept flags, and add a "default" flag that
allows you to mark a subvolume as the default.

Signed-off-by: Mark Harmstone <maharmstone@fb.com>
2024-09-17 17:00:03 +02:00
Mark Harmstone
e844ffcaad btrfs-progs: mkfs: add new option --subvol
Add a new option --subvol, which tells mkfs.btrfs to create the
specified directories as subvolumes when used with --rootdir.

Given a populated directory dir, the command

  $ mkfs.btrfs --rootdir dir --subvol usr --subvol home --subvol home/username img

will create subvolumes 'usr' and 'home' within the toplevel subvolume,
and subvolume 'username' within the 'home' subvolume. It will fail if
any of the directories do not yet exist.

Pull-request: #868
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: Mark Harmstone <maharmstone@fb.com>
Signed-off-by: David Sterba <dsterba@suse.com>
2024-09-17 17:00:03 +02:00
Qu Wenruo
18ecbfd3dd btrfs-progs: open the devices exclusively for writes
There is an internal report that, during btrfs-convert to block-group
tree, by accident some systemd events triggered the mount of the target
fs.

This leads to double mount (one by kernel and one by the btrfs-progs),
which seems to cause quite some problems.

To avoid such accident, exclusively opens all devices if btrfs-progs is
doing write operations.

Pull-request: #888
Reported-by: pandada8 <pandada8@gmail.com>
Signed-off-by: Qu Wenruo <wqu@suse.com>
2024-09-17 14:33:22 +02:00
David Sterba
8b36a293f7 btrfs-progs: mkfs: print only first warning when --rootdir finds a hardlink
There's a report that newly added --rootdir print too many warnings for
hardlinks, which is maybe not that uncommon. We still want to let the
user know about that so print it just once and count how many were
found:

  $ mkfs.btrfs --rootdir ...
  WARNING: '/tmp/btrfs-progs-mkfs-rootdir-hardlinks.7RcdfR/rootdir/inside_link' has extra hardlinks, they will be converted into new inodes
  WARNING: 12 hardlinks were detected in /tmp/btrfs-progs-mkfs-rootdir-hardlinks.7RcdfR/rootdir, all converted to new inodes

Link: https://github.com/kdave/btrfs-progs/pull/872#issuecomment-2289096125
Signed-off-by: David Sterba <dsterba@suse.com>
2024-08-15 00:02:39 +02:00
David Sterba
e5aeb39033 btrfs-progs: mkfs: use correct ctree.h include
Commit 14ac1a6051 ("btrfs-progs: mkfs: add support for squota")
mistakenly added ctree.h from libbtrfs/ but this is not supposed to be
used outside of the library. Moreover the correct ctree.h was already
there.

Signed-off-by: David Sterba <dsterba@suse.com>
2024-08-14 23:58:42 +02:00
Qu Wenruo
27974edb4d btrfs-progs: mkfs: warn about hard links with --rootdir
The recent rework changes how we detect hard links.

[OLD BEHAVIOR]
We trusted st_nlink and st_ino, reuse them without extra sanity
checks.

That behavior has problems handling cross mount-point or hard links out
of the rootdir cases.

[NEW BEHAVIOR]
The new refactored code will treat every inode, no matter if it's a
hardlink, as a new inode.

This means we will break the hard link detection, and every hard link
will be created as a different inode.

For the most common use case, like populating a rootfs, it's totally
fine.

[EXTRA WARNING]
But for cases where the user have extra hard links inside the rootdir,
output a warning just to inform the end user.

This will not cause any content difference, just breaking the hard links
into new inodes.

Signed-off-by: Qu Wenruo <wqu@suse.com>
2024-08-14 23:58:32 +02:00
Qu Wenruo
c6464d3f99 btrfs-progs: mkfs: rework how we traverse rootdir
[PITFALLS]
There are several hidden pitfalls of the existing traverse_directory():

- Hand written preorder traversal
  There is already a better written standard library function, nftw()
  doing exactly what we need.

- Over-designed path list
  To properly handle the directory change, we have structure
  directory_name_entry, to record every inode until rootdir.

  But it has two string members, dir_name and path, which is a little
  confusing and overkilled.
  As for preorder traversal, we will never need to read the parent's
  filename, just its btrfs inode number.

  And it's exported while no one utilizes it out of mkfs/rootdir.c.

- Weird inode numbers
  We use the inode number from st->st_ino, with an extra offset.
  This by itself is not safe, if the rootdir has child directories in
  another filesystem.

  And this results very weird inode numbers, e.g:

	item 0 key (256 INODE_ITEM 0) itemoff 16123 itemsize 160
	item 6 key (88347519 INODE_ITEM 0) itemoff 15815 itemsize 160
	item 16 key (88347520 INODE_ITEM 0) itemoff 15363 itemsize 160
	item 20 key (88347521 INODE_ITEM 0) itemoff 15119 itemsize 160
	item 24 key (88347522 INODE_ITEM 0) itemoff 14875 itemsize 160
	item 26 key (88347523 INODE_ITEM 0) itemoff 14700 itemsize 160
	item 28 key (88347524 INODE_ITEM 0) itemoff 14525 itemsize 160
	item 30 key (88347557 INODE_ITEM 0) itemoff 14350 itemsize 160
	item 32 key (88347566 INODE_ITEM 0) itemoff 14175 itemsize 160

  Which is far from a regular fs created by copying the data.

- Weird directory inode size calculation
  Unlike kernel, which updated the directory inode size every time new
  child inodes are added, we calculate the directory inode size by
  searching all its children first, then later new inodes linked to this
  directory won't touch the inode size.

- Bad hard link detection and cross mount point handling
  The hard link detection is purely based on the st_ino returned from
  the host filesystem, this means we do not have extra checks whether
  the inode is even inside the same fs.

  And we directly reuse st_nlink from the host filesystem, if there
  is a hard link out of rootdir, the st_nlink will be incorrect and
  cause a corrupted fs.

Enhance all these points by:

- Use nftw() to do the preorder traversal
  It also provides the extra level detection, which is pretty handy.

- Use a simple local inode_entry to record each parent
  The only value is a u64 to record the inode number.
  And one simple rootdir_path structure to record the list of
  inode_entry, alone with the current level.

  This rootdir_path structure along with two helpers,
  rootdir_path_push() and rootdir_path_pop(), along with the
  preorder traversal provided by nftw(), are enough for us to record
  all the parent directories until the rootdir.

- Grab new inode number properly
  Just call btrfs_get_free_objectid() to grab a proper inode number,
  other than using some weird calculated value.

- Treat every inode as a new one
  This means we will have no hard link support for now.

  But I still believe it's a good trade-off, especially considering the
  old handling is buggy for several corner cases.

- Use btrfs_insert_inode() and btrfs_add_link() to update directory
  inode automatically

With all the refactoring, the code is shorter and easier to read.

Reviewed-by: Boris Burkov <boris@bur.io>
Signed-off-by: Qu Wenruo <wqu@suse.com>
2024-08-14 23:58:27 +02:00
Mark Harmstone
e8c729743a btrfs-progs: mkfs: simplify mkfs_main() cleanup
mkfs_main() is a main-like function, meaning that return and exit are
equivalent. Deduplicate our cleanup code by moving the error label.

Signed-off-by: Mark Harmstone <maharmstone@fb.com>
Signed-off-by: David Sterba <dsterba@suse.com>
2024-07-30 20:04:38 +02:00
Qu Wenruo
d3cf350e21 btrfs-progs: introduce btrfs_rebuild_uuid_tree() for mkfs and btrfs-convert
Currently mkfs uses its own create_uuid_tree(), but that function is
only handling FS_TREE.  This means for btrfs-convert we do not generate
the uuid tree, nor add the UUID of the image subvolume.  This can be a
problem if we're going to support multiple subvolumes during mkfs time.

To address this, introduce a new helper, btrfs_rebuild_uuid_tree():

- Create a new uuid tree if there is not one

- Remove all the existing items from uuid tree

- Iterate through all subvolumes
  * If the subvolume has no valid UUID, regenerate one
  * Add the uuid entry for the subvolume UUID
  * If the subvolume has received UUID, also add it to UUID tree

By this, this new helper can handle all the uuid tree generation needs for:

- Current mkfs
  Only one uuid entry for FS_TREE

- Current btrfs-convert
  Only FS_TREE and the image subvolume

- Future multi-subvolume mkfs
  As we do the scan for all subvolumes.

- Future "btrfs rescue rebuild-uuid-tree"

Signed-off-by: Qu Wenruo <wqu@suse.com>
2024-07-30 20:02:56 +02:00
Qu Wenruo
99dc37bcfe btrfs-progs: cross-port btrfs_uuid_tree_add() from kernel
The modification is minimal:

- Replace WARN_ON() with UASSERT()

- Remove the @trans parameter for btrfs_extend_item() and
  btrfs_mark_buffer_dirty()
  As progs version doesn't need a transaction handler.

- Remove the btrfs_uuid_tree_add() in mkfs/main.c

Signed-off-by: Qu Wenruo <wqu@suse.com>
2024-07-30 20:02:42 +02:00
Qu Wenruo
8efa8092aa btrfs-progs: move uuid-tree definitions to kernel-shared/uuid-tree.h
Currently we already have a kernel-shared/uuid-tree.c, which is mostly
shared with kernel.

Kernel also has a uuid-tree.h, but we are still using ctree.h for the
header.

Move all the uuid-tree related definitions to kernel-shared/uuid-tree.h,
making future code sync easier.

Signed-off-by: Qu Wenruo <wqu@suse.com>
2024-07-30 20:01:59 +02:00
Yaroslav Halchenko
16a7cbca91 btrfs-progs: run codespell throughout fixing typos automagically
Spell checking can now run in automated mode.

=== Do not change lines below ===
{
 "chain": [],
 "cmd": "codespell -w",
 "exit": 0,
 "extra_inputs": [],
 "inputs": [],
 "outputs": [],
 "pwd": "."
}
^^^ Do not change lines above ^^^

Author: Yaroslav Halchenko <debian@onerussian.com>
Signed-off-by: David Sterba <dsterba@suse.com>
2024-07-30 19:56:08 +02:00
Qu Wenruo
3c555beabf btrfs-progs: introduce btrfs_make_subvolume()
There are two different subvolume/data reloc tree creation routines:

- create_subvol() from convert/main.c
  * calls btrfs_copy_root() to create an empty root
    This is not safe, as it relies on the source root to be empty.
  * calls btrfs_read_fs_root() to add it to the cache and trace it
    properly
  * calls btrfs_make_root_dir() to initialize the empty new root

- create_data_reloc_tree() from mkfs/main.c
  * calls btrfs_create_tree() to create an empty root
  * Manually add the root to fs_root cache
    This is only safe for data reloc tree as it's never updated
    inside btrfs-progs.
    But not safe for other subvolume trees.
  * manually setup the root dir

Both have their good and bad aspects, so here we introduce a new helper,
btrfs_make_subvolume():

- Calls btrfs_create_tree() to create an empty root
- Calls btrfs_read_fs_root() to setup the cache and tracking properly
- Calls btrfs_make_root_dir() to initialize the root dir
- Calls btrfs_update_root() to reflect the rootdir change

So this new helper can replace both create_subvol() and
create_data_reloc_tree().

Signed-off-by: Qu Wenruo <wqu@suse.com>
2024-07-30 19:54:04 +02:00
Qu Wenruo
9b74d80919 btrfs-progs: remove fs_info parameter from btrfs_create_tree()
The @fs_info parameter can be easily extracted from @trans, and kernel
has already remove the parameter.

Signed-off-by: Qu Wenruo <wqu@suse.com>
2024-07-30 19:54:00 +02:00
David Sterba
4db925911c btrfs-progs: use strncpy_null everywhere
Use the safe version of strncpy that makes sure the string is
terminated.

To be noted:

- the conversion in scrub path handling was skipped
- sizes of device paths in some ioctl related structures is
  BTRFS_DEVICE_PATH_NAME_MAX + 1

Recently gcc 13.3 started to detect problems with our use of strncpy
potentially lacking the null terminator, warnings like:

cmds/inspect.c: In function ‘cmd_inspect_logical_resolve’:
cmds/inspect.c:294:33: warning: ‘__builtin_strncpy’ specified bound 4096 equals destination size [-Wstringop-truncation]
  294 |                                 strncpy(mount_path, mounted, PATH_MAX);
      |                                 ^

Signed-off-by: David Sterba <dsterba@suse.com>
2024-06-24 19:18:48 +02:00
David Sterba
e673aa22bc btrfs-progs: rename and move __strncpy_null to string-utils
Now that there's only __strncpy_null we can drop the underscore and move
it to string-utils as it's a generic string function rather than
something for paths.

Signed-off-by: David Sterba <dsterba@suse.com>
2024-06-24 19:18:46 +02:00
David Sterba
eb7c5eb1bd btrfs-progs: copy entire label buffer to target buffers
The label is of a fixed size 256 bytes and expects the zero terminator.
Using __strncpy_null is correct as it makes sure there's always the zero
termination but the argument passed in skips the last character.

Signed-off-by: David Sterba <dsterba@suse.com>
2024-06-24 19:18:43 +02:00
Qu Wenruo
e0bf3943a4 btrfs-progs: move RST back to experimental
Currently raid-stripe-tree feature is still experimental as it requires
a BTRFS_DEBUG kernel to recognize it.  To avoid confusion move it back
to experimental so regular users won't incorrectly set it.

And since RST is no longer supported by default, also change the RST
profile detection so that for non-experimental build we won't enable RST
according to the data profiles.

Signed-off-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
2024-06-24 19:18:32 +02:00
Naohiro Aota
970c1a543c btrfs-progs: mkfs: align byte_count with sectorsize and zone size
While "byte_count" is eventually rounded down to sectorsize at make_btrfs()
or btrfs_add_to_fs_id(), it would be better round it down first and do the
size checks not to confuse the things.

Also, on a zoned device, creating a filesystem whose size is not aligned
to the zone boundary can be confusing. Round it down further to the zone
boundary.

The size calculation with a source directory is also tweaked to be aligned.
device_get_partition_size_fd_stat() must be aligned down not to exceed the
device size. And, btrfs_mkfs_size_dir() should have return sectorsize aligned
size. So, add an UASSERT for it.

Signed-off-by: Naohiro Aota <naohiro.aota@wdc.com>
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
2024-06-03 21:17:34 +02:00
Naohiro Aota
48c5ef6582 btrfs-progs: mkfs: fix minimum size calculation for zoned mode
Currently, we check if a device is larger than 5 zones to determine we can
create btrfs on the device or not. Actually, we need more zones to create
DUP block groups, so it fails with "ERROR: not enough free space to
allocate chunk". Implement proper support for non-SINGLE profile.

Also, current code does not ensure we can create tree-log BG and data
relocation BG, which are essential for the real usage. Count them as
requirement too.

The calculation for a regular btrfs is also adjusted to use dev_stripes
style.

Signed-off-by: Naohiro Aota <naohiro.aota@wdc.com>
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: Qu Wenruo <wqu@suse.com>
2024-06-03 21:17:15 +02:00
Naohiro Aota
2190d77a1c btrfs-progs: mkfs: unify zoned mode minimum size calc into btrfs_min_dev_size()
We are going to implement a better minimum size calculation for the zoned
mode. Move the current logic to btrfs_min_dev_size() and unify the size
checking path.

Also, convert "int mixed" to "bool mixed" while at it.

Signed-off-by: Naohiro Aota <naohiro.aota@wdc.com>
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
2024-06-03 21:15:26 +02:00
Naohiro Aota
5ff2e9c069 btrfs-progs: mkfs: remove duplicated device size check
test_minimum_size() already checks if each device can host the initial
block groups. There is no need to check if the first device can host the
initial system chunk again.

Signed-off-by: Naohiro Aota <naohiro.aota@wdc.com>
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
2024-06-03 21:14:34 +02:00
Naohiro Aota
d76d74c344 btrfs-progs: rename block_count to byte_count
block_count and dev_block_count are counting the size in bytes. And,
comparing them with e.g, "min_dev_size" is confusing. Rename them to
represent the unit better.

Signed-off-by: Naohiro Aota <naohiro.aota@wdc.com>
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
2024-06-03 21:12:47 +02:00
Qu Wenruo
c1d8bd82ca btrfs-progs: mkfs: skip failed mount check with --force
[BUG]
There is a bug report that, with very weird mount status, there can be
some mount source which can not be accessed:

  /path/dev/exports fs 500G 57G 444G 12% /path/dev/exports

Strace shows we can not access the above mount source:

 131065 stat("/path/dev/exports", 0x7ffed17b8e20) = -1 EACCES (Permission denied)

And lead to failed mount check:

 131065 write(2, "ERROR: ", 7)      = 7
 131065 write(2, "cannot check mount status of /de"..., 56) = 56
 131065 write(2, "\n", 1)        = 1

[CAUSE]
The mount check is based on libblkid, which gives the mount source, and
for non-btrfs mounts, we call path_is_reg_or_block_device() to check if
we even need to continue checking.

But in above case, the mount source is another fs, and we can not access
the source.

So we error out causing the check_mounted() to return error.

[FIX]
There is never any guarantee we can access the mount source, but on the
other hand, I do not want to ignore all access failure for the mount
source.

Let test_status_for_mkfs() to only skip check_mounted() error if
@force_overwrite is true.

This would still keep the old strict checks on whether the target is
already mounted, but if the end user really knows that certain mount
source do not need to be checked, they can always pass "-f" option to
skip the false alerts.

Link: https://bugzilla.suse.com/show_bug.cgi?id=1223799
Reported-by: Jiri Belka <jiri.belka@suse.com>
Signed-off-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
2024-05-17 18:23:46 +02:00
David Sterba
7f396f5ced btrfs-progs: reorder key initializations
Use the objectid, type, offset natural order as it's more readable and
we're used to read keys like that.

Signed-off-by: David Sterba <dsterba@suse.com>
2024-04-30 21:49:15 +02:00
Qu Wenruo
9de25ff2ae btrfs-progs: mkfs: use proper zoned compatible write for bgt feature
[BUG]
There is a bug report that mkfs.btrfs can not specify block-group-tree
feature along with zoned devices:

  # mkfs.btrfs /dev/nullb0 -O block-group-tree,zoned
  btrfs-progs v6.7.1
  See https://btrfs.readthedocs.io for more information.

  Resetting device zones /dev/nullb0 (40 zones) ...
  NOTE: several default settings have changed in version 5.15, please make sure
        this does not affect your deployments:
        - DUP for metadata (-m dup)
        - enabled no-holes (-O no-holes)
        - enabled free-space-tree (-R free-space-tree)

  ERROR: error during mkfs: Invalid argument

[CAUSE]
During mkfs, we need to write all the 7 or 8 tree blocks into the
metadata zone, and since it's zoned device, we need to fulfill all the
requirement for zoned writes, including:

- All writes must be in sequential bytenr
- Buffer must be aligned to sector size

The sequential bytenr requirement is already met by the mkfs design, but
the second requirement on memory alignment is never met for metadata, as
we put the contents of a leaf in extent_buffer::data[], which is after a
lot of small members.

Thus metadata IO buffer would never be aligned to sector size (normally
4K).
And we require btrfs_pwrite() and btrfs_pread() to handle the memory
alignment for us.

However in create_block_group_tree() we didn't use btrfs_pwrite(), but
plain pwrite() call directly, which would lead to -EINVAL error due to
memory alignment problem.

[FIX]
Just call btrfs_pwrite() instead of the plain pwrite() in
create_block_group_tree().

Issue: #765
Pull-request: #767
Reviewed-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Reviewed-by: Naohiro Aota <naohiro.aota@wdc.com>
Signed-off-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
2024-04-18 19:15:43 +02:00
David Sterba
3172d27fb9 btrfs-progs: mkfs: make transaction start and commit errors verbose
Use the templated error message for transaction failures, use the same
pattern assigning the ret and errno.

Signed-off-by: David Sterba <dsterba@suse.com>
2024-03-22 01:19:47 +01:00
David Sterba
a80d717db2 btrfs-progs: minor source sync with kernel 6.8
Sync a few more file on the source level with kernel 6.8.

- type cleanups
- defines and enums
- comments
- parameter updates
- error handling

Signed-off-by: David Sterba <dsterba@suse.com>
2024-03-12 21:22:56 +01:00
David Sterba
3d1a3c8c5a btrfs-progs: mkfs: print incompat and runtime features on one line
We've deprecated the -R option and runtime feature distinction, there's
only one option -O recommended so let it also print on the same line.
Incompat/compat/runtime status of a feature shall be consulted with the
documentation.

Signed-off-by: David Sterba <dsterba@suse.com>
2024-02-13 07:15:37 +01:00
David Sterba
e406abb157 btrfs-progs: mkfs: warn if page does not match sectorsize
Be verbose about the potential compatibility problems with the
sectorsize and page size. Also print the page size on the overview.

Signed-off-by: David Sterba <dsterba@suse.com>
2024-02-13 07:15:33 +01:00
Neal Gompa
e3232c2abb btrfs-progs: mkfs: make 4k sectorsize default
We have had working subpage support in Btrfs for many cycles now.
Generally, we do not want people creating filesystems by default
with non-4k sectorsizes since it creates portability problems.

As the subpage has stabilized it seems to be safe to do the switch.
This may still affect users that relying on the previous behaviour.

Issue: #604
Reviewed-by: Anand Jain <anand.jain@oracle.com>
Reviewed-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Reviewed-by: Eric Curtin <ecurtin@redhat.com>
Signed-off-by: Neal Gompa <neal@gompa.dev>
Signed-off-by: David Sterba <dsterba@suse.com>
2024-01-18 02:37:45 +01:00
Qu Wenruo
389c959d6d btrfs-progs: implement arg_strtou64_with_suffix() with a new helper
This patch introduces a new parser helper, parse_u64_with_suffix(),
which has a better error handling, following all the parse_*()
helpers to return non-zero value for errors.

This new helper is going to replace parse_size_from_string(), which
would directly call exit(1) to stop the whole program.

Furthermore most callers of parse_size_from_string() are expecting
exit(1) for error, so that they can skip the error handling.

For those call sites, introduce a wrapper, arg_strtou64_with_suffix(),
to do that.  The only disadvantage is a little less detailed error
report for why the parse failed, but for most cases the generic error
string should be enough.

Signed-off-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
2024-01-18 02:14:23 +01:00
David Sterba
b1e2de452a btrfs-progs: mkfs: print zone count for each device
In zoned mode print zone count for each device, the zone size must be
the same so it's sufficient to print it in the summary.

  $ mkfs.btrfs -O zoned /dev/nullb[0-3]
  ...
  Zoned device:       yes
    Zone size:        16.00MiB
  ...
  Devices:
     ID        SIZE  ZONES  PATH
      1   512.00MiB     32  /dev/nullb0
      2   256.00MiB     16  /dev/nullb1
      3     1.00GiB     64  /dev/nullb2
      4     2.00GiB    128  /dev/nullb3

Issue: #693
Signed-off-by: David Sterba <dsterba@suse.com>
2023-11-03 18:04:37 +01:00
David Sterba
2069bfe016 btrfs-progs: mkfs: drop unsigned long long casts for printf
The %llu specifier does not need the typecast for ULL for a long time,
remove it.

Signed-off-by: David Sterba <dsterba@suse.com>
2023-11-03 18:04:37 +01:00
David Sterba
b4f43d72ff btrfs-progs: mkfs: support parametric zone size
In experimental build, read global '--param zone-size=SIZE' and use it
as emulated zone size.  This is for testing only, will be promoted to a
proper option in the future.

Signed-off-by: David Sterba <dsterba@suse.com>
2023-11-03 18:04:37 +01:00
David Sterba
9908894102 btrfs-progs: mkfs: validate device uuid set on command line
We need to validate the device uuid the same way as the fsid:

  $ ./mkfs.btrfs --device-uuid 18eabcf0-6766-4fbf-b366-71b4ae725b2- img
  btrfs-progs v6.5.2
  See https://btrfs.readthedocs.io for more information.

  ERROR: could not parse device UUID: 18eabcf0-6766-4fbf-b366-71b4ae725b2-

Signed-off-by: David Sterba <dsterba@suse.com>
2023-10-21 15:51:07 +02:00
David Sterba
d8032c3b8b btrfs-progs: mkfs: print device uuid if set from command line
Print the device uuid in the summary in case it's specified on the
command line, not always as it would be confusing and is not usually
needed. Can be found in 'btrfs inspect-internal dump-super' as
device_item.uuid .

Signed-off-by: David Sterba <dsterba@suse.com>
2023-10-21 15:51:07 +02:00
Anand Jain
3f27e60866 btrfs-progs: mkfs: add option to specify device uuid
Add option --device-uuid that will set the device uuid item in super
block.

This is useful for creating a filesystem with a specific device uuid,
namely for testing.

Signed-off-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
2023-10-21 15:51:07 +02:00
Anand Jain
b0c4dfaaac btrfs-progs: document allowing duplicate fsid
The commit ("btrfs-progs: allow duplicate fsid for single device
filesystems") lets the duplicate fsid used for a new mkfs document this.

Signed-off-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: David Sterba <dsterba@suse.com>
2023-10-21 15:51:07 +02:00
Qu Wenruo
0af60b1faf btrfs-progs: mkfs: add the missing xattr for the rootdir inode
[BUG]
When using "mkfs.btrfs" with "--rootdir" option, the top level inode
(rootdir) will not get the same xattr from the source dir:

  mkdir -p source_dir/
  touch source_dir/file
  setfattr -n user.rootdir_xattr source_dir/
  setfattr -n user.regular_xattr source_dir/file
  mkfs.btrfs -f --rootdir source_dir $dev
  mount $dev $mnt
  getfattr $mnt
  # Nothing <<<
  getfattr $mnt/file
  # file: $mnt/file
  user.regular_xattr <<<

[CAUSE]
In function traverse_directory(), we only call add_xattr_item() for all
the child inodes, not really for the rootdir inode itself, leading to
the missing xattr items.

Not only xattr, in fact we also miss the uid/gid/timestamps/mode for the
rootdir inode.

[FIX]
Extract a dedicated function, copy_rootdir_inode(), to handle every
needed attributes for the rootdir inode, including:

- xattr
- uid
- gid
- mode
- timestamps

Issue: #688
Signed-off-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
2023-10-21 15:51:07 +02:00
Qu Wenruo
4f5a455d1b btrfs-progs: mkfs: do not enlarge the target block device
[BUG]
When running mkfs.btrfs with --rootdir on a block device, and the source
directory contains a sparse file, whose size is larger than the block
size, then mkfs.btrfs would fail:

  # lsblk  /dev/test/test
  NAME      MAJ:MIN RM SIZE RO TYPE MOUNTPOINTS
  test-test 253:0    0  10G  0 lvm
  # mkdir -p /tmp/output
  # truncate -s 20G /tmp/output/file
  # mkfs.btrfs -f --rootdir /tmp/output /dev/test/test
  # sudo mkfs.btrfs  -f /dev/test/scratch1  --rootdir /tmp/output/
  btrfs-progs v6.3.3
  See https://btrfs.readthedocs.io for more information.

  ERROR: unable to zero the output file

[CAUSE]
Mkfs.btrfs would try to zero out the target file according to the total
size of the directory.

However the directory size is calculated using the file size, not the
real bytes taken by the file, thus for such sparse file with holes only,
it would still take 20G.

Then we would use that 20G size to zero out the target file, but if the
target file is a block device, we would fail as we can not enlarge a block
device.

[FIX]
When zeroing the file, we only enlarge it if the target is a regular
file.
Otherwise we warn about the size and continue.

Please note that, since "mkfs.btrfs --rootdir" doesn't handle sparse
file any differently from regular file, above case would still fail due
to ENOSPC, as will write zeros into the target file inside the fs.

Proper handling for sparse files would need a new series of patch to
address.

Issue: #653
Signed-off-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
2023-10-21 15:51:07 +02:00
David Sterba
b421fdff95 btrfs-progs: move raid-stripe-tree and squota build out of experimental
The kernel patches for RST and squota are queued for 6.7, we need to be
able to test the features so it's not necessary to hide the mkfs support
under experimental build. The kernel may still need debug build to
enable mount.

Signed-off-by: David Sterba <dsterba@suse.com>
2023-10-17 19:33:59 +02:00
David Sterba
21aa6777b2 btrfs-progs: clean up includes, using include-what-you-use
Signed-off-by: David Sterba <dsterba@suse.com>
2023-10-03 01:11:57 +02:00
Josef Bacik
0fa89a9da7 btrfs-progs: move btrfs_uuid_tree_add into mkfs/main.c
This function is only used in mkfs, and doesn't exist in the kernel in
ctree.c.  Additionally we have a uuid lookup function to see if the uuid
exists in the tree, which for mkfs it won't because we just created the
tree.  Move btrfs_uuid_tree_add into mkfs, and remove the lookup
function as it's not needed.

Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: David Sterba <dsterba@suse.com>
2023-10-03 01:11:56 +02:00
Josef Bacik
3808db2b3e btrfs-progs: move btrfs_record_file_extent and code into a new file
This function and it's related functions only exist for the utilities
that populate existing file systems, and do not exist in the upstream
kernel.  Move this function and the related function into it's own
common source file and out of the kernel-shared sources, and then update
all of the users to include the new location of this code.

Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: David Sterba <dsterba@suse.com>
2023-10-03 01:11:56 +02:00