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imsm: update metadata for dirty -> clean or resync -> idle events 

From: Dan Williams <dan.j.williams@intel.com>

Signed-off-by: Dan Williams <dan.j.williams@intel.com>
This commit is contained in:
Dan Williams 2008-05-15 16:48:47 +10:00 committed by Neil Brown
parent 3dbccbcf5f
commit c2a1e7dad7
1 changed files with 175 additions and 2 deletions
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177
super-intel.c
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@ -18,6 +18,7 @@
*/
#include "mdadm.h"
#include "mdmon.h"
#include <values.h>
#include <scsi/sg.h>
#include <ctype.h>
@ -124,6 +125,7 @@ struct intel_super {
struct imsm_super *mpb;
void *buf;
};
int updates_pending;
struct dl {
struct dl *next;
int index;
@ -1124,17 +1126,129 @@ static int imsm_open_new(struct supertype *c, struct active_array *a, int inst)
static void imsm_mark_clean(struct active_array *a, unsigned long long sync_pos)
{
fprintf(stderr, "imsm: mark clean %llu\n", sync_pos);
int inst = a->info.container_member;
struct intel_super *super = a->container->sb;
struct imsm_dev *dev = get_imsm_dev(super->mpb, inst);
if (dev->vol.dirty) {
fprintf(stderr, "imsm: mark clean %llu\n", sync_pos);
dev->vol.dirty = 0;
super->updates_pending++;
}
}
static void imsm_mark_dirty(struct active_array *a)
{
fprintf(stderr, "imsm: mark dirty\n");
int inst = a->info.container_member;
struct intel_super *super = a->container->sb;
struct imsm_dev *dev = get_imsm_dev(super->mpb, inst);
if (!dev->vol.dirty) {
fprintf(stderr, "imsm: mark dirty\n");
dev->vol.dirty = 1;
super->updates_pending++;
}
}
static __u8 imsm_check_degraded(struct imsm_super *mpb, int n, int failed)
{
struct imsm_dev *dev = get_imsm_dev(mpb, n);
struct imsm_map *map = dev->vol.map;
if (!failed)
return map->map_state;
switch (get_imsm_raid_level(map)) {
case 0:
return IMSM_T_STATE_FAILED;
break;
case 1:
if (failed < map->num_members)
return IMSM_T_STATE_DEGRADED;
else
return IMSM_T_STATE_FAILED;
break;
case 10:
{
/**
* check to see if any mirrors have failed,
* otherwise we are degraded
*/
int device_per_mirror = 2; /* FIXME is this always the case?
* and are they always adjacent?
*/
int failed = 0;
int i;
for (i = 0; i < map->num_members; i++) {
int idx = get_imsm_disk_idx(map, i);
struct imsm_disk *disk = get_imsm_disk(mpb, idx);
if (__le32_to_cpu(disk->status) & FAILED_DISK)
failed++;
if (failed >= device_per_mirror)
return IMSM_T_STATE_FAILED;
/* reset 'failed' for next mirror set */
if (!((i + 1) % device_per_mirror))
failed = 0;
}
return IMSM_T_STATE_DEGRADED;
}
case 5:
if (failed < 2)
return IMSM_T_STATE_DEGRADED;
else
return IMSM_T_STATE_FAILED;
break;
default:
break;
}
return map->map_state;
}
static int imsm_count_failed(struct imsm_super *mpb, struct imsm_map *map)
{
int i;
int failed = 0;
struct imsm_disk *disk;
for (i = 0; i < map->num_members; i++) {
int idx = get_imsm_disk_idx(map, i);
disk = get_imsm_disk(mpb, idx);
if (__le32_to_cpu(disk->status) & FAILED_DISK)
failed++;
}
return failed;
}
static void imsm_mark_sync(struct active_array *a, unsigned long long resync)
{
int inst = a->info.container_member;
struct intel_super *super = a->container->sb;
struct imsm_dev *dev = get_imsm_dev(super->mpb, inst);
struct imsm_map *map = dev->vol.map;
int failed;
__u8 map_state;
if (resync != ~0ULL)
return;
fprintf(stderr, "imsm: mark sync\n");
failed = imsm_count_failed(super->mpb, map);
map_state = imsm_check_degraded(super->mpb, inst, failed);
if (!failed)
map_state = IMSM_T_STATE_NORMAL;
if (map->map_state != map_state) {
map->map_state = map_state;
super->updates_pending++;
}
}
static void imsm_set_disk(struct active_array *a, int n)
@ -1142,9 +1256,68 @@ static void imsm_set_disk(struct active_array *a, int n)
fprintf(stderr, "imsm: set_disk %d\n", n);
}
static int store_imsm_mpb(int fd, struct intel_super *super)
{
struct imsm_super *mpb = super->mpb;
__u32 mpb_size = __le32_to_cpu(mpb->mpb_size);
unsigned long long dsize;
unsigned long long sectors;
get_dev_size(fd, NULL, &dsize);
/* first block is stored on second to last sector of the disk */
if (lseek64(fd, dsize - (512 * 2), SEEK_SET) < 0)
return 1;
if (write(fd, super->buf, 512) != 512)
return 1;
if (mpb_size <= 512)
return 0;
/* -1 because we already wrote a sector */
sectors = mpb_sectors(mpb) - 1;
/* write the extended mpb to the sectors preceeding the anchor */
if (lseek64(fd, dsize - (512 * (2 + sectors)), SEEK_SET) < 0)
return 1;
if (write(fd, super->buf + 512, mpb_size - 512) != mpb_size - 512)
return 1;
fsync(fd);
return 0;
}
static void imsm_sync_metadata(struct active_array *a)
{
struct intel_super *super = a->container->sb;
struct imsm_super *mpb = super->mpb;
struct dl *d;
__u32 generation;
__u32 sum;
if (!super->updates_pending)
return;
fprintf(stderr, "imsm: sync_metadata\n");
/* 'generation' is incremented everytime the metadata is written */
generation = __le32_to_cpu(mpb->generation_num);
generation++;
mpb->generation_num = __cpu_to_le32(generation);
/* recalculate checksum */
sum = gen_imsm_checksum(mpb);
mpb->check_sum = __cpu_to_le32(sum);
for (d = super->disks; d ; d = d->next)
if (store_imsm_mpb(d->fd, super))
fprintf(stderr, "%s: failed for device %d:%d %s\n",
__func__, d->major, d->minor, strerror(errno));
super->updates_pending = 0;
}
struct superswitch super_imsm = {