From e11e93facc38fb264a5ff1e154ebb2f11dc5cffa Mon Sep 17 00:00:00 2001 From: NeilBrown Date: Wed, 9 May 2007 02:35:36 -0700 Subject: [PATCH] md: move test for whether level supports bitmap to correct place 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 Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- drivers/md/md.c | 42 ++++++++++++++++++++++++++---------------- 1 file changed, 26 insertions(+), 16 deletions(-) diff --git a/drivers/md/md.c b/drivers/md/md.c index afff038ecf..64b35cbf31 100644 --- a/drivers/md/md.c +++ b/drivers/md/md.c @@ -695,6 +695,17 @@ static int super_90_load(mdk_rdev_t *rdev, mdk_rdev_t *refdev, int minor_version rdev->data_offset = 0; rdev->sb_size = MD_SB_BYTES; + if (sb->state & (1<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 *mddev, mdk_rdev_t *rdev) mddev->max_disks = MD_SB_DISKS; if (sb->state & (1<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, mdk_rdev_t *refdev, int minor_version) 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 *mddev, mdk_rdev_t *rdev) 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); -- 2.20.1