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btrfs-progs: remove function btrfs_check_allocatable_zones()

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This function is introduced by commit b031fe84fd ("btrfs-progs: zoned:
implement zoned chunk allocator") but it never got called since then.

Furthermore in the kernel zoned code, there is no such function from the
very beginning, and everything is handled by
btrfs_find_allocatable_zones().

Thus we can safely remove the function.

Reviewed-by: Anand Jain <anand.jain@oracle.com>
Signed-off-by: Qu Wenruo <wqu@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
This commit is contained in:
Qu Wenruo 2023-05-03 14:03:37 +08:00 committed by David Sterba
parent e150c843ea
commit 5af786113f
1 changed files with 0 additions and 58 deletions
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58
kernel-shared/zoned.c
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@ -596,64 +596,6 @@ size_t btrfs_sb_io(int fd, void *buf, off_t offset, int rw)
return ret_sz;
}
/*
* Check if spcecifeid region is suitable for allocation
*
* @device: the device to allocate a region
* @pos: the position of the region
* @num_bytes: the size of the region
*
* In non-ZONED device, anywhere is suitable for allocation. In ZONED
* device, check if:
* 1) the region is not on non-empty sequential zones,
* 2) all zones in the region have the same zone type,
* 3) it does not contain super block location
*/
bool btrfs_check_allocatable_zones(struct btrfs_device *device, u64 pos,
u64 num_bytes)
{
struct btrfs_zoned_device_info *zinfo = device->zone_info;
u64 nzones, begin, end;
u64 sb_pos;
bool is_sequential;
int shift;
int i;
if (!zinfo || zinfo->model == ZONED_NONE)
return true;
nzones = num_bytes / zinfo->zone_size;
begin = pos / zinfo->zone_size;
end = begin + nzones;
ASSERT(IS_ALIGNED(pos, zinfo->zone_size));
ASSERT(IS_ALIGNED(num_bytes, zinfo->zone_size));
if (end > zinfo->nr_zones)
return false;
shift = ilog2(zinfo->zone_size);
for (i = 0; i < BTRFS_SUPER_MIRROR_MAX; i++) {
sb_pos = sb_zone_number(shift, i);
if (!(end < sb_pos || sb_pos + 1 < begin))
return false;
}
is_sequential = btrfs_dev_is_sequential(device, pos);
while (num_bytes) {
if (is_sequential && !btrfs_dev_is_empty_zone(device, pos))
return false;
if (is_sequential != btrfs_dev_is_sequential(device, pos))
return false;
pos += zinfo->zone_size;
num_bytes -= zinfo->zone_size;
}
return true;
}
/**
* btrfs_find_allocatable_zones - find allocatable zones within a given region
*