lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

md: Make mddev->chunk_size sector-based.

Browse Source 
This patch renames the chunk_size field to chunk_sectors with the
implied change of semantics.  Since

	is_power_of_2(chunk_size) = is_power_of_2(chunk_sectors << 9)
				  = is_power_of_2(chunk_sectors)

these bits don't need an adjustment for the shift.

Signed-off-by: Andre Noll <maan@systemlinux.org>
Signed-off-by: NeilBrown <neilb@suse.de>
This commit is contained in:
Andre Noll
2009-06-18 08:45:01 +10:00
committed by NeilBrown
parent fbb704efb7
commit 9d8f036362
7 changed files with 74 additions and 68 deletions
Download Patch File Download Diff File Expand all files Collapse all files

51
drivers/md/md.c
View File

@@ -869,7 +869,7 @@ static int super_90_validate(mddev_t *mddev, mdk_rdev_t *rdev)
mddev->minor_version = sb->minor_version;
mddev->patch_version = sb->patch_version;
mddev->external = 0;
mddev->chunk_size = sb->chunk_size;
mddev->chunk_sectors = sb->chunk_size >> 9;
mddev->ctime = sb->ctime;
mddev->utime = sb->utime;
mddev->level = sb->level;
@@ -892,7 +892,7 @@ static int super_90_validate(mddev_t *mddev, mdk_rdev_t *rdev)
mddev->delta_disks = 0;
mddev->new_level = mddev->level;
mddev->new_layout = mddev->layout;
mddev->new_chunk = mddev->chunk_size;
mddev->new_chunk = mddev->chunk_sectors << 9;
}
if (sb->state & (1<<MD_SB_CLEAN))
@@ -1021,7 +1021,7 @@ static void super_90_sync(mddev_t *mddev, mdk_rdev_t *rdev)
sb->recovery_cp = 0;
sb->layout = mddev->layout;
sb->chunk_size = mddev->chunk_size;
sb->chunk_size = mddev->chunk_sectors << 9;
if (mddev->bitmap && mddev->bitmap_file == NULL)
sb->state |= (1<<MD_SB_BITMAP_PRESENT);
@@ -1278,7 +1278,7 @@ static int super_1_validate(mddev_t *mddev, mdk_rdev_t *rdev)
mddev->major_version = 1;
mddev->patch_version = 0;
mddev->external = 0;
mddev->chunk_size = le32_to_cpu(sb->chunksize) << 9;
mddev->chunk_sectors = le32_to_cpu(sb->chunksize);
mddev->ctime = le64_to_cpu(sb->ctime) & ((1ULL << 32)-1);
mddev->utime = le64_to_cpu(sb->utime) & ((1ULL << 32)-1);
mddev->level = le32_to_cpu(sb->level);
@@ -1310,7 +1310,7 @@ static int super_1_validate(mddev_t *mddev, mdk_rdev_t *rdev)
mddev->delta_disks = 0;
mddev->new_level = mddev->level;
mddev->new_layout = mddev->layout;
mddev->new_chunk = mddev->chunk_size;
mddev->new_chunk = mddev->chunk_sectors << 9;
}
} else if (mddev->pers == NULL) {
@@ -1382,7 +1382,7 @@ static void super_1_sync(mddev_t *mddev, mdk_rdev_t *rdev)
sb->raid_disks = cpu_to_le32(mddev->raid_disks);
sb->size = cpu_to_le64(mddev->dev_sectors);
sb->chunksize = cpu_to_le32(mddev->chunk_size >> 9);
sb->chunksize = cpu_to_le32(mddev->chunk_sectors);
sb->level = cpu_to_le32(mddev->level);
sb->layout = cpu_to_le32(mddev->layout);
@@ -2753,7 +2753,7 @@ level_store(mddev_t *mddev, const char *buf, size_t len)
if (IS_ERR(priv)) {
mddev->new_level = mddev->level;
mddev->new_layout = mddev->layout;
mddev->new_chunk = mddev->chunk_size;
mddev->new_chunk = mddev->chunk_sectors << 9;
mddev->raid_disks -= mddev->delta_disks;
mddev->delta_disks = 0;
module_put(pers->owner);
@@ -2771,7 +2771,7 @@ level_store(mddev_t *mddev, const char *buf, size_t len)
strlcpy(mddev->clevel, pers->name, sizeof(mddev->clevel));
mddev->level = mddev->new_level;
mddev->layout = mddev->new_layout;
mddev->chunk_size = mddev->new_chunk;
mddev->chunk_sectors = mddev->new_chunk >> 9;
mddev->delta_disks = 0;
pers->run(mddev);
mddev_resume(mddev);
@@ -2864,10 +2864,10 @@ static ssize_t
chunk_size_show(mddev_t *mddev, char *page)
{
if (mddev->reshape_position != MaxSector &&
mddev->chunk_size != mddev->new_chunk)
mddev->chunk_sectors << 9 != mddev->new_chunk)
return sprintf(page, "%d (%d)\n", mddev->new_chunk,
mddev->chunk_size);
return sprintf(page, "%d\n", mddev->chunk_size);
mddev->chunk_sectors << 9);
return sprintf(page, "%d\n", mddev->chunk_sectors << 9);
}
static ssize_t
@@ -2889,7 +2889,7 @@ chunk_size_store(mddev_t *mddev, const char *buf, size_t len)
} else {
mddev->new_chunk = n;
if (mddev->reshape_position == MaxSector)
mddev->chunk_size = n;
mddev->chunk_sectors = n >> 9;
}
return len;
}
@@ -3534,9 +3534,9 @@ min_sync_store(mddev_t *mddev, const char *buf, size_t len)
return -EBUSY;
/* Must be a multiple of chunk_size */
if (mddev->chunk_size) {
if (mddev->chunk_sectors) {
sector_t temp = min;
if (sector_div(temp, (mddev->chunk_size>>9)))
if (sector_div(temp, mddev->chunk_sectors))
return -EINVAL;
}
mddev->resync_min = min;
@@ -3572,9 +3572,9 @@ max_sync_store(mddev_t *mddev, const char *buf, size_t len)
return -EBUSY;
/* Must be a multiple of chunk_size */
if (mddev->chunk_size) {
if (mddev->chunk_sectors) {
sector_t temp = max;
if (sector_div(temp, (mddev->chunk_size>>9)))
if (sector_div(temp, mddev->chunk_sectors))
return -EINVAL;
}
mddev->resync_max = max;
@@ -3665,7 +3665,7 @@ reshape_position_store(mddev_t *mddev, const char *buf, size_t len)
mddev->delta_disks = 0;
mddev->new_level = mddev->level;
mddev->new_layout = mddev->layout;
mddev->new_chunk = mddev->chunk_size;
mddev->new_chunk = mddev->chunk_sectors << 9;
return len;
}
@@ -4007,7 +4007,7 @@ static int do_md_run(mddev_t * mddev)
analyze_sbs(mddev);
}
chunk_size = mddev->chunk_size;
chunk_size = mddev->chunk_sectors << 9;
if (chunk_size) {
if (chunk_size > MAX_CHUNK_SIZE) {
@@ -4406,7 +4406,7 @@ static int do_md_stop(mddev_t * mddev, int mode, int is_open)
mddev->flags = 0;
mddev->ro = 0;
mddev->metadata_type[0] = 0;
mddev->chunk_size = 0;
mddev->chunk_sectors = 0;
mddev->ctime = mddev->utime = 0;
mddev->layout = 0;
mddev->max_disks = 0;
@@ -4619,7 +4619,7 @@ static int get_array_info(mddev_t * mddev, void __user * arg)
info.spare_disks = spare;
info.layout = mddev->layout;
info.chunk_size = mddev->chunk_size;
info.chunk_size = mddev->chunk_sectors << 9;
if (copy_to_user(arg, &info, sizeof(info)))
return -EFAULT;
@@ -4844,7 +4844,8 @@ static int add_new_disk(mddev_t * mddev, mdu_disk_info_t *info)
rdev->sb_start = rdev->bdev->bd_inode->i_size / 512;
} else
rdev->sb_start = calc_dev_sboffset(rdev->bdev);
rdev->sectors = calc_num_sectors(rdev, mddev->chunk_size);
rdev->sectors = calc_num_sectors(rdev,
mddev->chunk_sectors << 9);
err = bind_rdev_to_array(rdev, mddev);
if (err) {
@@ -4914,7 +4915,7 @@ static int hot_add_disk(mddev_t * mddev, dev_t dev)
else
rdev->sb_start = rdev->bdev->bd_inode->i_size / 512;
rdev->sectors = calc_num_sectors(rdev, mddev->chunk_size);
rdev->sectors = calc_num_sectors(rdev, mddev->chunk_sectors << 9);
if (test_bit(Faulty, &rdev->flags)) {
printk(KERN_WARNING
@@ -5063,7 +5064,7 @@ static int set_array_info(mddev_t * mddev, mdu_array_info_t *info)
mddev->external = 0;
mddev->layout = info->layout;
mddev->chunk_size = info->chunk_size;
mddev->chunk_sectors = info->chunk_size >> 9;
mddev->max_disks = MD_SB_DISKS;
@@ -5082,7 +5083,7 @@ static int set_array_info(mddev_t * mddev, mdu_array_info_t *info)
get_random_bytes(mddev->uuid, 16);
mddev->new_level = mddev->level;
mddev->new_chunk = mddev->chunk_size;
mddev->new_chunk = mddev->chunk_sectors << 9;
mddev->new_layout = mddev->layout;
mddev->delta_disks = 0;
@@ -5192,7 +5193,7 @@ static int update_array_info(mddev_t *mddev, mdu_array_info_t *info)
mddev->level != info->level ||
/* mddev->layout != info->layout || */
!mddev->persistent != info->not_persistent||
mddev->chunk_size != info->chunk_size ||
mddev->chunk_sectors != info->chunk_size >> 9 ||
/* ignore bottom 8 bits of state, and allow SB_BITMAP_PRESENT to change */
((state^info->state) & 0xfffffe00)
)