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-rw-r--r--kernel/drivers/md/md.h40
1 files changed, 23 insertions, 17 deletions
diff --git a/kernel/drivers/md/md.h b/kernel/drivers/md/md.h
index 4046a6c6f..dfa57b415 100644
--- a/kernel/drivers/md/md.h
+++ b/kernel/drivers/md/md.h
@@ -16,6 +16,7 @@
#define _MD_MD_H
#include <linux/blkdev.h>
+#include <linux/backing-dev.h>
#include <linux/kobject.h>
#include <linux/list.h>
#include <linux/mm.h>
@@ -86,10 +87,16 @@ struct md_rdev {
* array and could again if we did a partial
* resync from the bitmap
*/
- sector_t recovery_offset;/* If this device has been partially
+ union {
+ sector_t recovery_offset;/* If this device has been partially
* recovered, this is where we were
* up to.
*/
+ sector_t journal_tail; /* If this device is a journal device,
+ * this is the journal tail (journal
+ * recovery start point)
+ */
+ };
atomic_t nr_pending; /* number of pending requests.
* only maintained for arrays that
@@ -133,10 +140,6 @@ enum flag_bits {
Bitmap_sync, /* ..actually, not quite In_sync. Need a
* bitmap-based recovery to get fully in sync
*/
- Unmerged, /* device is being added to array and should
- * be considerred for bvec_merge_fn but not
- * yet for actual IO
- */
WriteMostly, /* Avoid reading if at all possible */
AutoDetected, /* added by auto-detect */
Blocked, /* An error occurred but has not yet
@@ -175,6 +178,11 @@ enum flag_bits {
* This device is seen locally but not
* by the whole cluster
*/
+ Journal, /* This device is used as journal for
+ * raid-5/6.
+ * Usually, this device should be faster
+ * than other devices in the array
+ */
};
#define BB_LEN_MASK (0x00000000000001FFULL)
@@ -224,6 +232,8 @@ struct mddev {
#define MD_STILL_CLOSED 4 /* If set, then array has not been opened since
* md_ioctl checked on it.
*/
+#define MD_JOURNAL_CLEAN 5 /* A raid with journal is already clean */
+#define MD_HAS_JOURNAL 6 /* The raid array has journal feature set */
int suspended;
atomic_t active_io;
@@ -373,10 +383,6 @@ struct mddev {
int degraded; /* whether md should consider
* adding a spare
*/
- int merge_check_needed; /* at least one
- * member device
- * has a
- * merge_bvec_fn */
atomic_t recovery_active; /* blocks scheduled, but not written */
wait_queue_head_t recovery_wait;
@@ -531,10 +537,6 @@ struct md_personality
/* congested implements bdi.congested_fn().
* Will not be called while array is 'suspended' */
int (*congested)(struct mddev *mddev, int bits);
- /* mergeable_bvec is use to implement ->merge_bvec_fn */
- int (*mergeable_bvec)(struct mddev *mddev,
- struct bvec_merge_data *bvm,
- struct bio_vec *biovec);
};
struct md_sysfs_entry {
@@ -564,7 +566,9 @@ static inline char * mdname (struct mddev * mddev)
static inline int sysfs_link_rdev(struct mddev *mddev, struct md_rdev *rdev)
{
char nm[20];
- if (!test_bit(Replacement, &rdev->flags) && mddev->kobj.sd) {
+ if (!test_bit(Replacement, &rdev->flags) &&
+ !test_bit(Journal, &rdev->flags) &&
+ mddev->kobj.sd) {
sprintf(nm, "rd%d", rdev->raid_disk);
return sysfs_create_link(&mddev->kobj, &rdev->kobj, nm);
} else
@@ -574,7 +578,9 @@ static inline int sysfs_link_rdev(struct mddev *mddev, struct md_rdev *rdev)
static inline void sysfs_unlink_rdev(struct mddev *mddev, struct md_rdev *rdev)
{
char nm[20];
- if (!test_bit(Replacement, &rdev->flags) && mddev->kobj.sd) {
+ if (!test_bit(Replacement, &rdev->flags) &&
+ !test_bit(Journal, &rdev->flags) &&
+ mddev->kobj.sd) {
sprintf(nm, "rd%d", rdev->raid_disk);
sysfs_remove_link(&mddev->kobj, nm);
}
@@ -651,7 +657,7 @@ extern void md_wait_for_blocked_rdev(struct md_rdev *rdev, struct mddev *mddev);
extern void md_set_array_sectors(struct mddev *mddev, sector_t array_sectors);
extern int md_check_no_bitmap(struct mddev *mddev);
extern int md_integrity_register(struct mddev *mddev);
-extern void md_integrity_add_rdev(struct md_rdev *rdev, struct mddev *mddev);
+extern int md_integrity_add_rdev(struct md_rdev *rdev, struct mddev *mddev);
extern int strict_strtoul_scaled(const char *cp, unsigned long *res, int scale);
extern void mddev_init(struct mddev *mddev);
@@ -669,7 +675,7 @@ extern struct bio *bio_alloc_mddev(gfp_t gfp_mask, int nr_iovecs,
struct mddev *mddev);
extern void md_unplug(struct blk_plug_cb *cb, bool from_schedule);
-extern void md_reload_sb(struct mddev *mddev);
+extern void md_reload_sb(struct mddev *mddev, int raid_disk);
extern void md_update_sb(struct mddev *mddev, int force);
extern void md_kick_rdev_from_array(struct md_rdev * rdev);
struct md_rdev *md_find_rdev_nr_rcu(struct mddev *mddev, int nr);