[PATCH 001 of 5] md: Move test for whether level supports bitmap to correct place.

NeilBrown
2007-05-08T04:29:51Z

We need to check for internal-consistency of superblock in
load_super. validate_super is for inter-device consistency.

With the test in the wrong place, a badly created array will confuse md
rather an produce sensible errors.

Signed-off-by: Neil Brown <neilb@suse.de>

### Diffstat output
./drivers/md/md.c | 42 ++++++++++++++++++++++++++----------------
1 file changed, 26 insertions(+), 16 deletions(-)

diff .prev/drivers/md/md.c ./drivers/md/md.c
--- .prev/drivers/md/md.c 2007-05-07 14:33:31.000000000 +1000
+++ ./drivers/md/md.c 2007-05-07 14:33:31.000000000 +1000
@@ -695,6 +695,17 @@ static int super_90_load(mdk_rdev_t *rde
rdev->data_offset = 0;
rdev->sb_size = MD_SB_BYTES;

+ if (sb->state & (1<<MD_SB_BITMAP_PRESENT)) {
+ if (sb->level != 1 && sb->level != 4
+ && sb->level != 5 && sb->level != 6
+ && sb->level != 10) {
+ /* FIXME use a better test */
+ printk(KERN_WARNING
+ "md: bitmaps not supported for this level.\n");
+ goto abort;
+ }
+ }
+
if (sb->level == LEVEL_MULTIPATH)
rdev->desc_nr = -1;
else
@@ -793,16 +804,8 @@ static int super_90_validate(mddev_t *md
mddev->max_disks = MD_SB_DISKS;

if (sb->state & (1<<MD_SB_BITMAP_PRESENT) &&
- mddev->bitmap_file == NULL) {
- if (mddev->level != 1 && mddev->level != 4
- && mddev->level != 5 && mddev->level != 6
- && mddev->level != 10) {
- /* FIXME use a better test */
- printk(KERN_WARNING "md: bitmaps not supported for this level.\n");
- return -EINVAL;
- }
+ mddev->bitmap_file == NULL)
mddev->bitmap_offset = mddev->default_bitmap_offset;
- }

} else if (mddev->pers == NULL) {
/* Insist on good event counter while assembling */
@@ -1059,6 +1062,18 @@ static int super_1_load(mdk_rdev_t *rdev
bdevname(rdev->bdev,b));
return -EINVAL;
}
+ if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_BITMAP_OFFSET)) {
+ if (sb->level != cpu_to_le32(1) &&
+ sb->level != cpu_to_le32(4) &&
+ sb->level != cpu_to_le32(5) &&
+ sb->level != cpu_to_le32(6) &&
+ sb->level != cpu_to_le32(10)) {
+ printk(KERN_WARNING
+ "md: bitmaps not supported for this level.\n");
+ return -EINVAL;
+ }
+ }
+
rdev->preferred_minor = 0xffff;
rdev->data_offset = le64_to_cpu(sb->data_offset);
atomic_set(&rdev->corrected_errors, le32_to_cpu(sb->cnt_corrected_read));
@@ -1142,14 +1157,9 @@ static int super_1_validate(mddev_t *mdd
mddev->max_disks = (4096-256)/2;

if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_BITMAP_OFFSET) &&
- mddev->bitmap_file == NULL ) {
- if (mddev->level != 1 && mddev->level != 5 && mddev->level != 6
- && mddev->level != 10) {
- printk(KERN_WARNING "md: bitmaps not supported for this level.\n");
- return -EINVAL;
- }
+ mddev->bitmap_file == NULL )
mddev->bitmap_offset = (__s32)le32_to_cpu(sb->bitmap_offset);
- }
+
if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_RESHAPE_ACTIVE)) {
mddev->reshape_position = le64_to_cpu(sb->reshape_position);
mddev->delta_disks = le32_to_cpu(sb->delta_disks);