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MD: replace special disk roles with macros

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Add the following two macros for special roles: spare and faulty

MD_DISK_ROLE_SPARE	0xffff
MD_DISK_ROLE_FAULTY	0xfffe

Add MD_DISK_ROLE_MAX	0xff00 as the maximal possible regular role,
and minimal value of special role.

Signed-off-by: Song Liu <songliubraving@fb.com>
Signed-off-by: Shaohua Li <shli@fb.com>
Signed-off-by: NeilBrown <neilb@suse.com>
This commit is contained in:
Song Liu 2015-08-13 14:31:54 -07:00 committed by NeilBrown
parent 28c1b9fdf4
commit c4d4c91b44
2 changed files with 11 additions and 7 deletions
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14
drivers/md/md.c
View File

@ -1608,7 +1608,7 @@ static int super_1_validate(struct mddev *mddev, struct md_rdev *rdev)
++ev1;
if (rdev->desc_nr >= 0 &&
rdev->desc_nr < le32_to_cpu(sb->max_dev) &&
le16_to_cpu(sb->dev_roles[rdev->desc_nr]) < 0xfffe)
le16_to_cpu(sb->dev_roles[rdev->desc_nr]) < MD_DISK_ROLE_MAX)
if (ev1 < mddev->events)
return -EINVAL;
} else if (mddev->bitmap) {
@ -1628,14 +1628,14 @@ static int super_1_validate(struct mddev *mddev, struct md_rdev *rdev)
int role;
if (rdev->desc_nr < 0 ||
rdev->desc_nr >= le32_to_cpu(sb->max_dev)) {
role = 0xffff;
role = MD_DISK_ROLE_SPARE;
rdev->desc_nr = -1;
} else
role = le16_to_cpu(sb->dev_roles[rdev->desc_nr]);
switch(role) {
case 0xffff: /* spare */
case MD_DISK_ROLE_SPARE: /* spare */
break;
case 0xfffe: /* faulty */
case MD_DISK_ROLE_FAULTY: /* faulty */
set_bit(Faulty, &rdev->flags);
break;
default:
@ -1788,18 +1788,18 @@ retry:
max_dev = le32_to_cpu(sb->max_dev);
for (i=0; i<max_dev;i++)
sb->dev_roles[i] = cpu_to_le16(0xfffe);
sb->dev_roles[i] = cpu_to_le16(MD_DISK_ROLE_FAULTY);
rdev_for_each(rdev2, mddev) {
i = rdev2->desc_nr;
if (test_bit(Faulty, &rdev2->flags))
sb->dev_roles[i] = cpu_to_le16(0xfffe);
sb->dev_roles[i] = cpu_to_le16(MD_DISK_ROLE_FAULTY);
else if (test_bit(In_sync, &rdev2->flags))
sb->dev_roles[i] = cpu_to_le16(rdev2->raid_disk);
else if (rdev2->raid_disk >= 0)
sb->dev_roles[i] = cpu_to_le16(rdev2->raid_disk);
else
sb->dev_roles[i] = cpu_to_le16(0xffff);
sb->dev_roles[i] = cpu_to_le16(MD_DISK_ROLE_SPARE);
}
sb->sb_csum = calc_sb_1_csum(sb);

4
include/uapi/linux/raid/md_p.h
View File

@ -90,6 +90,10 @@
* dire need
*/
#define MD_DISK_ROLE_SPARE 0xffff
#define MD_DISK_ROLE_FAULTY 0xfffe
#define MD_DISK_ROLE_MAX 0xff00 /* max value of regular disk role */
typedef struct mdp_device_descriptor_s {
__u32 number; /* 0 Device number in the entire set */
__u32 major; /* 1 Device major number */