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dm integrity: factor out get_provided_data_sectors() 

Move code to a new function get_provided_data_sectors().

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
This commit is contained in:
Mikulas Patocka 2020-03-22 20:42:24 +01:00 committed by Mike Snitzer
parent f6f72f32c2
commit 87fb177b4c
1 changed files with 23 additions and 10 deletions
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33
drivers/md/dm-integrity.c
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@ -3078,6 +3078,24 @@ static int calculate_device_limits(struct dm_integrity_c *ic)
return 0;
}
static void get_provided_data_sectors(struct dm_integrity_c *ic)
{
if (!ic->meta_dev) {
int test_bit;
ic->provided_data_sectors = 0;
for (test_bit = fls64(ic->meta_device_sectors) - 1; test_bit >= 3; test_bit--) {
__u64 prev_data_sectors = ic->provided_data_sectors;
ic->provided_data_sectors |= (sector_t)1 << test_bit;
if (calculate_device_limits(ic))
ic->provided_data_sectors = prev_data_sectors;
}
} else {
ic->provided_data_sectors = ic->data_device_sectors;
ic->provided_data_sectors &= ~(sector_t)(ic->sectors_per_block - 1);
}
}
static int initialize_superblock(struct dm_integrity_c *ic, unsigned journal_sectors, unsigned interleave_sectors)
{
unsigned journal_sections;
@ -3105,20 +3123,15 @@ static int initialize_superblock(struct dm_integrity_c *ic, unsigned journal_sec
ic->sb->log2_interleave_sectors = max((__u8)MIN_LOG2_INTERLEAVE_SECTORS, ic->sb->log2_interleave_sectors);
ic->sb->log2_interleave_sectors = min((__u8)MAX_LOG2_INTERLEAVE_SECTORS, ic->sb->log2_interleave_sectors);
ic->provided_data_sectors = 0;
for (test_bit = fls64(ic->meta_device_sectors) - 1; test_bit >= 3; test_bit--) {
__u64 prev_data_sectors = ic->provided_data_sectors;
ic->provided_data_sectors |= (sector_t)1 << test_bit;
if (calculate_device_limits(ic))
ic->provided_data_sectors = prev_data_sectors;
}
get_provided_data_sectors(ic);
if (!ic->provided_data_sectors)
return -EINVAL;
} else {
ic->sb->log2_interleave_sectors = 0;
ic->provided_data_sectors = ic->data_device_sectors;
ic->provided_data_sectors &= ~(sector_t)(ic->sectors_per_block - 1);
get_provided_data_sectors(ic);
if (!ic->provided_data_sectors)
return -EINVAL;
try_smaller_buffer:
ic->sb->journal_sections = cpu_to_le32(0);