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>
The stride length has been removed from kernel code, remove it here as
well.
Signed-off-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Copy over structs, accessors, and constants for simple quotas
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Boris Burkov <boris@bur.io>
Signed-off-by: David Sterba <dsterba@suse.com>
Add the definitions for the on-disk format of the raid stripe tree.
Signed-off-by: Johannes Thumshirn <johannes.thumshirn@wdc.com>
Signed-off-by: David Sterba <dsterba@suse.com>
[BUG]
There is a bug report that on s390x big endian systems, mkfs.btrfs just
fails:
$ mkfs.btrfs -f ~/test.img
btrfs-progs v6.3.1
Invalid mapping for 1081344-1097728, got 17592186044416-17592190238720
Couldn't map the block 1081344
ERROR: cannot read chunk root
ERROR: open ctree failed
[CAUSE]
The error is caused by wrong endian conversion. The s390x is a big
endian architecture:
$ lscpu
Byte Order: Big Endian
While checking the offending @disk_key and @key inside
btrfs_read_sys_array(), we got:
2301 while (cur_offset < array_size) {
(gdb)
2304 if (cur_offset + len > array_size)
(gdb)
2307 btrfs_disk_key_to_cpu(&key, disk_key);
(gdb)
2310 sb_array_offset += len;
(gdb) print *disk_key
$2 = {objectid = 281474976710656, type = 228 '\344', offset = 17592186044416}
(gdb) print key
$3 = {objectid = 281474976710656, type = 228 '\344', offset = 17592186044416}
(gdb)
Now we can see, @disk_key is indeed in the little endian, but @key is
not converted to the CPU native endian.
Furthermore, if we step into the help btrfs_disk_key_to_cpu(), it shows
we're using little endian version:
(gdb) step
btrfs_disk_key_to_cpu (disk_key=0x109fcdb, cpu_key=0x3ffffff847f)
at ./kernel-shared/accessors.h:592
592 memcpy(cpu_key, disk_key, sizeof(struct btrfs_key));
[FIX]
The kernel accessors.h checks if __LITTLE_ENDIAN is defined or not, but
that only works inside kernel.
In user space, __LITTLE_ENDIAN and __BIG_ENDIAN are both provided by
kerncompat.h that should have been included already.
Instead we should check __BYTE_ORDER against __LITTLE_ENDIAN to
determine our endianness.
With this change, s390x build works as expected now.
Issue: #639
Signed-off-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This syncs accessors.[ch] from the kernel. For the most part
accessors.h will remain the same, there's just some helpers that need to
be adjusted for eb->data instead of eb->pages. Additionally accessors.c
needed to be completely updated to deal with this as well.
This is a set of files where we will likely only sync the header going
forward, and leave the C file in place as it needs to be specific to
btrfs-progs.
This forced a few "unrelated" changes
- Using btrfs_dir_item_ftype() instead of btrfs_dir_item_type(). This
is due to the encryption changes, and was simpler to just do in this
patch.
- Adjusting some of the print tree code to use the actual helpers and
not the btrfs-progs ones.
A local definition of static_assert is used to avoid compilation
failures on older gcc (< 9) where the 2nd parameter is mandatory.
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: David Sterba <dsterba@suse.com>
