diff options
Diffstat (limited to 'drivers/md/raid1.c')
| -rw-r--r-- | drivers/md/raid1.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c index 57d6abd497ef..d3d3568b4fb1 100644 --- a/drivers/md/raid1.c +++ b/drivers/md/raid1.c @@ -46,6 +46,20 @@ */ #define NR_RAID1_BIOS 256 +/* when we get a read error on a read-only array, we redirect to another + * device without failing the first device, or trying to over-write to + * correct the read error. To keep track of bad blocks on a per-bio + * level, we store IO_BLOCKED in the appropriate 'bios' pointer + */ +#define IO_BLOCKED ((struct bio *)1) +/* When we successfully write to a known bad-block, we need to remove the + * bad-block marking which must be done from process context. So we record + * the success by setting devs[n].bio to IO_MADE_GOOD + */ +#define IO_MADE_GOOD ((struct bio *)2) + +#define BIO_SPECIAL(bio) ((unsigned long)bio <= 2) + /* When there are this many requests queue to be written by * the raid1 thread, we become 'congested' to provide back-pressure * for writeback. |