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md: prepare for non-power-of-two chunk sizes

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Remove chunk size check from md as this is now performed in the run
function in each personality.

Replace chunk size power 2 code calculations by a regular division.

Signed-off-by: raziebe@gmail.com
Signed-off-by: NeilBrown <neilb@suse.de>
This commit is contained in:
raz ben yehuda 2009-06-16 17:01:42 +10:00 committed by NeilBrown
parent 740da44918
commit 2ac06c3332
1 changed files with 15 additions and 14 deletions
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29
drivers/md/md.c
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@ -444,8 +444,11 @@ static sector_t calc_num_sectors(mdk_rdev_t *rdev, unsigned chunk_size)
{
sector_t num_sectors = rdev->sb_start;
if (chunk_size)
num_sectors &= ~((sector_t)chunk_size/512 - 1);
if (chunk_size) {
unsigned chunk_sects = chunk_size>>9;
sector_div(num_sectors, chunk_sects);
num_sectors *= chunk_sects;
}
return num_sectors;
}
@ -1248,8 +1251,12 @@ static int super_1_load(mdk_rdev_t *rdev, mdk_rdev_t *refdev, int minor_version)
if (rdev->sectors < le64_to_cpu(sb->data_size))
return -EINVAL;
rdev->sectors = le64_to_cpu(sb->data_size);
if (le32_to_cpu(sb->chunksize))
rdev->sectors &= ~((sector_t)le32_to_cpu(sb->chunksize) - 1);
if (le32_to_cpu(sb->chunksize)) {
int chunk_sects = le32_to_cpu(sb->chunksize);
sector_t chunks = rdev->sectors;
sector_div(chunks, chunk_sects);
rdev->sectors = chunks * chunk_sects;
}
if (le64_to_cpu(sb->size) > rdev->sectors)
return -EINVAL;
@ -3528,7 +3535,8 @@ min_sync_store(mddev_t *mddev, const char *buf, size_t len)
/* Must be a multiple of chunk_size */
if (mddev->chunk_size) {
if (min & (sector_t)((mddev->chunk_size>>9)-1))
sector_t temp = min;
if (sector_div(temp, (mddev->chunk_size>>9)))
return -EINVAL;
}
mddev->resync_min = min;
@ -3565,7 +3573,8 @@ max_sync_store(mddev_t *mddev, const char *buf, size_t len)
/* Must be a multiple of chunk_size */
if (mddev->chunk_size) {
if (max & (sector_t)((mddev->chunk_size>>9)-1))
sector_t temp = max;
if (sector_div(temp, (mddev->chunk_size>>9)))
return -EINVAL;
}
mddev->resync_max = max;
@ -4006,14 +4015,6 @@ static int do_md_run(mddev_t * mddev)
chunk_size, MAX_CHUNK_SIZE);
return -EINVAL;
}
/*
* chunk-size has to be a power of 2
*/
if ( (1 << ffz(~chunk_size)) != chunk_size) {
printk(KERN_ERR "chunk_size of %d not valid\n", chunk_size);
return -EINVAL;
}
/* devices must have minimum size of one chunk */
list_for_each_entry(rdev, &mddev->disks, same_set) {
if (test_bit(Faulty, &rdev->flags))