Print warning when one of the following is requested by some command
line option:
- btrfstune -b: conversion to block-group-tree
- mkfs.btrfs --num-global-roots: extent-tree-v2
- btrfs-image -d: dump image with data
Issue: #523
Signed-off-by: David Sterba <dsterba@suse.com>
[BUG]
Even with chunk_objectid bug fixed, mkfs.btrfs can still caused stack
overflow when enabling extent-tree-v2 feature (need experimental
features enabled):
# ./mkfs.btrfs -f -O extent-tree-v2 ~/test.img
btrfs-progs v5.19.1
See http://btrfs.wiki.kernel.org for more information.
ERROR: superblock magic doesn't match
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)
Label: (null)
UUID: 205c61e7-f58e-4e8f-9dc2-38724f5c554b
Node size: 16384
Sector size: 4096
Filesystem size: 512.00MiB
Block group profiles:
Data: single 8.00MiB
Metadata: DUP 32.00MiB
System: DUP 8.00MiB
SSD detected: no
Zoned device: no
=================================================================
[... Skip full ASAN output ...]
==65655==ABORTING
[CAUSE]
For experimental build, we have unified feature output, but the old
buffer size is only 64 bytes, which is too small to cover the new full
feature string:
extref, skinny-metadata, no-holes, free-space-tree, block-group-tree, extent-tree-v2
Above feature string is already 84 bytes, over the 64 on-stack memory
size.
This can also be proved by the ASAN output:
==65655==ERROR: AddressSanitizer: stack-buffer-overflow on address 0x7ffc4e03b1d0 at pc 0x7ff0fc05fafe bp 0x7ffc4e03ac60 sp 0x7ffc4e03a408
WRITE of size 17 at 0x7ffc4e03b1d0 thread T0
#0 0x7ff0fc05fafd in __interceptor_strcat /usr/src/debug/gcc/libsanitizer/asan/asan_interceptors.cpp:377
#1 0x55cdb7b06ca5 in parse_features_to_string common/fsfeatures.c:316
#2 0x55cdb7b06ce1 in btrfs_parse_fs_features_to_string common/fsfeatures.c:324
#3 0x55cdb7a37226 in main mkfs/main.c:1783
#4 0x7ff0fbe3c28f (/usr/lib/libc.so.6+0x2328f)
#5 0x7ff0fbe3c349 in __libc_start_main (/usr/lib/libc.so.6+0x23349)
#6 0x55cdb7a2cb34 in _start ../sysdeps/x86_64/start.S:115
[FIX]
Introduce a new macro, BTRFS_FEATURE_STRING_BUF_SIZE, along with a new
sanity check helper, btrfs_assert_feature_buf_size().
The problem is I can not find a build time method to verify
BTRFS_FEATURE_STRING_BUF_SIZE is large enough to contain all feature
names, thus have to go the runtime function to do the BUG_ON() to verify
the macro size.
Now the minimal buffer size for experimental build is 138 bytes, just
bump it to 160 for future expansion.
And if further features go beyond that number, mkfs.btrfs/btrfs-convert
will immediately crash at that BUG_ON(), so we can definitely detect it.
Reviewed-by: Anand Jain <anand.jain@oracle.com>
Tested-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
[BUG]
When enabling extent-tree-v2 feature at mkfs time (need to enable
experimental features), mkfs.btrfs will crash:
# ./mkfs.btrfs -f -O extent-tree-v2 ~/test.img
btrfs-progs v5.19.1
See http://btrfs.wiki.kernel.org for more information.
ERROR: superblock magic doesn't match
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)
Segmentation fault (core dumped)
[CAUSE]
The block group tree looks like this after make_btrfs() call:
(gdb) call btrfs_print_tree(root->fs_info->block_group_root->node, 0)
leaf 1163264 items 1 free space 16234 generation 1 owner BLOCK_GROUP_TREE
leaf 1163264 flags 0x0() backref revision 1
checksum stored f137c1ac
checksum calced f137c1ac
fs uuid 450d4b15-4954-4574-9801-8c6d248aaec6
chunk uuid 4c4cc54d-f240-4aa4-b88b-bd487db43444
item 0 key (1048576 BLOCK_GROUP_ITEM 4194304) itemoff 16259 itemsize 24
block group used 131072 chunk_objectid 256 flags SYSTEM|single
^^^
This looks completely sane, but notice that chunk_objectid 256.
That 256 value is the expected one for regular non-extent-tree-v2 btrfs,
but for extent-tree-v2, chunk_objectid is reused as the global id of
extent tree where the block group belongs to.
With the old 256 value as chunk_objectid, btrfs will not find an extent
tree root for the block group, and return NULL for btrfs_extent_root()
call, and trigger segfault.
This is a regression caused by commit 1430b41427 ("btrfs-progs:
separate block group tree from extent tree v2"), which doesn't take
extent-tree-v2 on-disk format into consideration.
[FIX]
For the initial btrfs created by make_btrfs(), all block group items
will be in extent-tree global id 0, thus we can reset chunk_objectid to
0, if and only if extent-tree-v2 is enabled.
Reviewed-by: Anand Jain <anand.jain@oracle.com>
Tested-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
[BUG]
Commit "btrfs-progs: prepare merging compat feature lists" tries to
merged "-O" and "-R" options, as they don't correctly represents
btrfs features.
But that commit caused the following bug during mkfs for experimental
build:
$ mkfs.btrfs -f -O block-group-tree /dev/nvme0n1
btrfs-progs v5.19.1
See http://btrfs.wiki.kernel.org for more information.
ERROR: superblock magic doesn't match
ERROR: illegal nodesize 16384 (not equal to 4096 for mixed block group)
[CAUSE]
Currently btrfs_parse_fs_features() will return a u64, and reuse the
same u64 for both incompat and compat RO flags for experimental branch.
This can easily leads to conflicts, as
BTRFS_FEATURE_INCOMPAT_MIXED_BLOCK_GROUP and
BTRFS_FEATURE_COMPAT_RO_BLOCK_GROUP_TREE both share the same bit
(1 << 2).
Thus for above case, mkfs.btrfs believe it has set MIXED_BLOCK_GROUP
feature, but what we really want is BLOCK_GROUP_TREE.
[FIX]
Instead of incorrectly re-using the same bits in btrfs_feature, split
the old flags into 3 flags:
- incompat_flag
- compat_ro_flag
- runtime_flag
The first two flags are easy to understand, the corresponding flag of
each feature.
The last runtime_flag is to compensate features which doesn't have any
on-disk flag set, like QUOTA and LIST_ALL.
And since we're no longer using a single u64 as features, we have to
introduce a new structure, btrfs_mkfs_features, to contain above 3
flags.
This also mean, things like default mkfs features must be converted to
use the new structure, thus those old macros are all converted to
const static structures:
- BTRFS_MKFS_DEFAULT_FEATURES + BTRFS_MKFS_DEFAULT_RUNTIME_FEATURES
-> btrfs_mkfs_default_features
- BTRFS_CONVERT_ALLOWED_FEATURES -> btrfs_convert_allowed_features
And since we're using a structure, it's not longer as easy to implement
a disallowed mask.
Thus functions with @mask_disallowed are all changed to using
an @allowed structure pointer (which can be NULL).
Finally if we have experimental features enabled, all features can be
specified by -O options, and we can output a unified feature list,
instead of the old split ones.
Signed-off-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
[BUG]
When running mkfs tests on a newly rebooted minimal system, it can cause
mkfs/009 to fail.
The reproduce steps requires /tmp to has minimal files in the first
place.
# mkdir /tmp/rootdir
# xfs_io -f -c "pwrite 0 16k" /tmp/rootdir
# mkfs.btrfs --rootdir /tmp/rootdir -f $dev
# btrfs check $dev
Opening filesystem to check...
Checking filesystem on /dev/test/scratch1
UUID: 6821b3db-f056-4c18-b797-32679dcd4272
[1/7] checking root items
[2/7] checking extents
data backref 13631488 root 5 owner 170 offset 0 num_refs 0 not found in extent tree
incorrect local backref count on 13631488 root 5 owner 170 offset 0 found 1 wanted 0 back 0x55ff6cd72260
backref 13631488 root 5 not referenced back 0x55ff6cd4c1f0
incorrect global backref count on 13631488 found 2 wanted 1
backpointer mismatch on [13631488 16384]
ERROR: errors found in extent allocation tree or chunk allocation
[CAUSE]
The extent tree has the following weird item:
item 0 key (13631488 EXTENT_ITEM 16384) itemoff 16250 itemsize 33
refs 1 gen 0 flags DATA
tree block backref root FS_TREE
This is an extent item for data, thus it should not have an inline tree
backref.
Then checking the fs tree:
item 0 key (170 INODE_ITEM 0) itemoff 16123 itemsize 160
generation 7 transid 0 size 16384 nbytes 16384
block group 0 mode 100600 links 1 uid 1000 gid 1000 rdev 0
sequence 0 flags 0x0(none)
atime 1664866393.0 (2022-10-04 14:53:13)
ctime 1664863510.0 (2022-10-04 14:05:10)
mtime 1664863455.0 (2022-10-04 14:04:15)
otime 0.0 (1970-01-01 08:00:00)
There is an inode item before the root dir inode.
And that inode number 170 is causing the problem.
In traverse_directory(), we use the inode number reported from stat()
directly as btrfs inode number, and pass it to
btrfs_record_file_extent(), which finally calls btrfs_inc_extent_ref(),
with above 170 passed as @owner parameter.
But inside btrfs_inc_extent_ref() we use that @owner value to determine
if it's a data backref.
Since we got a smaller than BTRFS_FIRST_FREE_OBJECTID, btrfs treats it
as tree block, and cause the above problem.
[FIX]
As a quick fix, always add BTRFS_FIRST_FREE_OBJECTID to all inode number
directly grabbed from stat().
And add an ASSERT() in __btrfs_record_file_extent() to catch unexpected
objectid.
This is not a perfect solution, as the resulted fs will has a huge gap
in its inodes:
item 0 key (256 INODE_ITEM 0) itemoff 16123 itemsize 160
item 4 key (426 INODE_ITEM 0) itemoff 15883 itemsize 160
For a proper fix, we should allocate new btrfs inode numbers in a
sequential order, but that would be another series of patches.
Signed-off-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
There's a group of helpers to read device size, the btrfs_device_size
should be one of them. Rename it and so minor cleanup.
Signed-off-by: David Sterba <dsterba@suse.com>
Replace BUG_ON after transaction start failures, all the functions
already handle errors and return them to the caller. The other error
handling is for impossible conditions.
Signed-off-by: David Sterba <dsterba@suse.com>
The leafsize has never been different from nodesize and since 4.0 (2015)
it's been alias for nodesize. This should be enough time for everybody
to update so the support is removed.
Signed-off-by: David Sterba <dsterba@suse.com>
The meaning of the -b/--byte-count option is different than what the
help text says. Historically it was used to set the filesystem size but
with multiple devices it sets the size on each device:
$ mkfs.btrfs /dev/sdx[1234]
...
Number of devices: 4
Devices:
ID SIZE PATH
1 2.00GiB /dev/sdx1
2 2.00GiB /dev/sdx2
3 2.00GiB /dev/sdx3
4 2.00GiB /dev/sdx4
And when set to 1G:
$ mkfs.btrfs -b 1G /dev/sdx[1234]
...
Number of devices: 4
Devices:
ID SIZE PATH
1 1.00GiB /dev/sdx1
2 1.00GiB /dev/sdx2
3 1.00GiB /dev/sdx3
4 1.00GiB /dev/sdx4
Signed-off-by: David Sterba <dsterba@suse.com>
The (unsigned long long) type casts can be dropped, printf understands
%llu and u64 and does not warn. In cases where the type is not u64 keep
the cast.
Signed-off-by: David Sterba <dsterba@suse.com>
When devices are formatted as btrfs, btrfs_prepare_device is called
sequentially for each device, which takes too much time.
Put each btrfs_prepare_device into a thread, wait for the first thread
to complete to mkfs.btrfs, and wait for other threads to complete before
adding other devices to the file system.
During the preparation it's either trim/discard or zone reset.
This was tested with TCMU emulation with two zoned devices. Each device
is 2000G (about 19.53 TiB), the region size is 4MB, Use the following
parameters for targetcli:
create name=zbc0 size=20000G cfgstring=model-HM/zsize-4/conv-100@~/zbc0.raw
Call difftime to calculate the running time of the function
btrfs_prepare_device. Calculate the time from thread creation to
completion of all threads after patching:
$ lsscsi -p
[10:0:1:0] (0x14) LIO-ORG TCMU ZBC device 0002 /dev/sdb - none
[11:0:1:0] (0x14) LIO-ORG TCMU ZBC device 0002 /dev/sdc - none
$ sudo mkfs.btrfs -d single -m single -O zoned /dev/sdc /dev/sdb -f
....
time for prepare devices:4.000000.
....
$ sudo mkfs.btrfs -d single -m single -O zoned /dev/sdc /dev/sdb -f
...
time for prepare devices:2.000000.
...
Issue: #496
Reviewed-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: Li Zhang <zhanglikernel@gmail.com>
Signed-off-by: David Sterba <dsterba@suse.com>
The preferred order:
- system headers
- standard headers
- libraries
- kernel library
- kernel shared
- common headers
- other tools
- own headers
Signed-off-by: David Sterba <dsterba@suse.com>
The source dir points to the argv data, we should make a copy to be sure
it won't change due to further processing.
Signed-off-by: David Sterba <dsterba@suse.com>
The helper parse_label is used only once and is trivial. Open code it in
the argument parsing, also to make the exit() is more visible.
Signed-off-by: David Sterba <dsterba@suse.com>
There's a helper to parse profile name and exits on error. As this is a
trivial helper we can open code it and adapt the error message to be
more specific what failed.
Signed-off-by: David Sterba <dsterba@suse.com>
To reduce the test matrix and to follow the kernel behavior, make sure
for block-group-tree feature, we have no-holes and free-space-tree
features enabled.
Signed-off-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Block group tree feature is completely a standalone feature, and it has
been over 5 years before the initial introduction to solve the long
mount time.
I don't really want to waste another 5 years waiting for a feature which
may or may not work, but definitely not properly reviewed for its
preparation patches.
So this patch will separate the block group tree feature into a
standalone compat RO feature.
There is a catch, in mkfs create_block_group_tree(), current
tree-checker only accepts block group item with valid chunk_objectid,
but the existing code from extent-tree-v2 didn't properly initialize it.
This patch will also fix above mentioned problem so kernel can mount it
correctly.
Now mkfs/fsck should be able to handle the fs with block group tree.
Signed-off-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
The extent tree v2 (thankfully not yet fully materialized) needs a
new root for storing all block group items.
My initial proposal years ago just added a new tree rootid, and load it
from tree root, just like what we did for quota/free space tree/uuid/extent
roots.
But the extent tree v2 patches introduced a completely new (and to me,
wasteful) way to store block group tree root into super block.
Currently there are only 3 trees stored in super blocks, and they all
have their valid reasons:
- Chunk root
Needed for bootstrap.
- Tree root
Really the entrance of all trees.
- Log root
This is special as log root has to be updated out of existing
transaction mechanism.
There is not even any reason to put block group root into super blocks,
the block group tree is updated at the same timing as old extent tree,
no need for extra bootstrap/out-of-transaction update.
So just move block group root from super block into tree root.
Signed-off-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
In mkfs_btrfs(), we have a btrfs_mkfs_block array to store how many tree
blocks we need to reserve for the initial btrfs image.
Currently we have two very similar arrays, extent_tree_v1_blocks and
extent_tree_v2_blocks.
The only difference is just v2 has an extra block for block group tree.
This patch will add two helpers, mkfs_blocks_add() and
mkfs_blocks_remove() to properly add/remove one block dynamically from
the array.
This allows 3 things:
- Merge extent_tree_v1_blocks and extent_tree_v2_blocks into one array
The new array will be the same as extent_tree_v1_blocks.
For extent-tree-v2, we just dynamically add MKFS_BLOCK_GROUP_TREE.
- Remove free space tree block on-demand
This only works for extent-tree-v1 case, as v2 has a hard requirement
on free space tree.
But this still make code much cleaner, not doing any special hacks.
- Allow future expansion without introduce new array
I strongly doubt why this is not properly done in extent-tree-v2
preparation patches.
We should not allow bad practice to sneak in just because it's some
preparation patches for a larger feature.
Signed-off-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Add constant for initial value to avoid unexpected clashes with user
defined getopt values and shift the common size getopt values.
Signed-off-by: David Sterba <dsterba@suse.com>
[BUG]
When running btrfs/011 with subpage case, even with RAID56 support, it
still fails with the following error:
QA output created by 011
*** test btrfs replace
mkfs failed
(see /home/adam/xfstests-dev/results//btrfs/011.full for details)
The full log shows:
---------workout "-m single -d single -M" 1 no 64-----------
ERROR: illegal nodesize 65536 (not equal to 4096 for mixed block group)
mkfs failed
This is a critical error, making test case to be aborted, without
checking the rest profiles.
[CAUSE]
Mkfs.btrfs always uses the maximum value between sectorsize and page
size for its mixed profile nodesize.
For subpage case, it means we always go PAGE_SIZE, no matter whatever
the sectorsize is passed in.
[FIX]
Just get rid of the direct PAGE_SIZE usage when determining nodesize for
mixed profiles.
And use sectorsize directly (either passed in by the user, or
determined from page size).
Signed-off-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Currently, we create the initial system block group in the zone 2. That
will create the BG at 64MB when the zone size is 32 MB, which collides with
the regular superblock location. It results in mount failure with:
BTRFS info (device nullb0): zoned mode enabled with zone size 33554432
BTRFS error (device nullb0): zoned: block group 67108864 must not contain super block
BTRFS error (device nullb0): failed to read block groups: -117
BTRFS error (device nullb0): open_ctree failed
Fix that by calculating the proper location of the initial system BG. It
avoids using zones reserved for zoned superblock logging and the zones
where a regular superblock resides.
Signed-off-by: Naohiro Aota <naohiro.aota@wdc.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Now that we have all of the supporting code, add the ability to create
all of the global roots for an extent tree v2 fs. This will default to
nr_cpu's, but also allow the user to specify how many global roots they
would like.
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Our initial block group will use global root id 0 with extent tree v2,
so adjust the helper to take the chunk_objectid as an argument, as we'll
set this to 0 for extent tree v2 and then
BTRFS_FIRST_CHUNK_TREE_OBJECTID for extent tree v1.
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: David Sterba <dsterba@suse.com>
We're going to start create global roots from mkfs, and we need to have
a offset set for the root key. Make the btrfs_create_tree() take a key
for the root_key instead of just the objectid so we can setup these new
style roots properly.
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: David Sterba <dsterba@suse.com>
In order to make sure the file system is consistent we need to record
the number of global roots we should have in the super block. We could
infer this from the number of global roots we find, however this could
lead to interesting fuzzing problems, so add a source of truth to the
super block in order to make it easier to verify the file system is
consistent.
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Add the extent tree v2 table with the block group tree as a root, and
then create the empty root and use the proper root for cleanup up the
temporary block groups.
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Instead of accessing the extent root directory for modifying block
groups, use the helper which will do the correct thing based on the
flags of the file system.
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Now that all callers are using the _nr variations we can simply rename
these helpers to btrfs_item_##member/btrfs_set_item_##member and change
the actual item SETGET funcs to raw_item_##member/set_raw_item_##member
and then change all callers to drop the _nr part.
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: David Sterba <dsterba@suse.com>
We have a lot of the following patterns
item = btrfs_item_nr(nr);
btrfs_set_item_*(eb, item, val);
btrfs_set_item_*(eb, btrfs_item_nr(nr), val);
in a lot of places in our code. Instead add _nr variations of these
helpers and convert all of the users to this new helper.
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This helper only takes the nodesize, but in the future it'll take a bool
to indicate if we're extent tree v2. The remaining users are all where
we only have extent_buffer, but we should always have a valid
eb->fs_info in these cases, so add BUG_ON()'s for the !eb->fs_info case
and then convert these callers to use BTRFS_LEAF_DATA_SIZE which takes
the fs_info.
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: David Sterba <dsterba@suse.com>
We use __BTRFS_LEAF_DATA_SIZE() in a few places for mkfs. With extent
tree v2 we'll be increasing the size of btrfs_header, so it'll be kind
of annoying to add flags to all callers of __BTRFS_LEAF_DATA_SIZE, so
simply calculate it once and put it in the mkfs_config and use that.
Reviewed-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Pass BTRFS_BLOCK_GROUP_DATA and BTRFS_BLOCK_GROUP_METADATA to
zoned_profile_supported(), so we can actually distinguish if it is a data
or a meta-data block group.
Fixes: 8f914d518a46 ("btrfs-progs: zoned support DUP on metadata block groups")
Signed-off-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Currently we have two places checking if a block-group profile is
supported on a zoned device, one in mkfs/main.c and one in
kernel-shared/zoned.c.
Use the one from kernel-shared/zoned.c in mkfs as well, unifying all
checks.
Signed-off-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: David Sterba <dsterba@suse.com>
cfg->fs_uuid is either 0 or set to the value of the -U parameter
passed to mkfs.btrfs. However the value of the latter is already being
validated in the main mkfs function. Just remove the duplicated checks
in make_btrfs as they effectively can never be executed.
Signed-off-by: Nikolay Borisov <nborisov@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
We want to enable developers to test the extent tree v2 features as they
are added, add the ability to mkfs an extent tree v2 fs if we have
experimental enabled.
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: David Sterba <dsterba@suse.com>
We are going to have multiples of these trees with extent tree v2, so
add a rb tree to track them based on their root key value. This works
for both v1 and v2, so we can remove the direct pointers to these roots
in our fs_info.
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: David Sterba <dsterba@suse.com>
We're going to have multiple free space roots in the future, so access
it via a helper in most cases. We will address the remaining direct
accesses in future patches.
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: David Sterba <dsterba@suse.com>
When we switch to multiple global trees we'll need to access the
appropriate extent root depending on the block group or possibly root.
To handle this, use a helper in most places and then the actual root in
places where it is required. We will whittle down the direct accessors
with future patches, but this does the bulk of the preparatory work.
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: David Sterba <dsterba@suse.com>
With extent tree v2 we will have per-block group checksums, so add a
helper to access the csum root and rename the fs_info csum_root to
_csum_root to catch all the places that are accessing it directly.
Convert everybody to use the helper except for internal things.
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: David Sterba <dsterba@suse.com>
