}
EXPORT_SYMBOL_GPL(bio_clone_mddev);
+void md_trim_bio(struct bio *bio, int offset, int size)
+{
+ /* 'bio' is a cloned bio which we need to trim to match
+ * the given offset and size.
+ * This requires adjusting bi_sector, bi_size, and bi_io_vec
+ */
+ int i;
+ struct bio_vec *bvec;
+ int sofar = 0;
+
+ size <<= 9;
+ if (offset == 0 && size == bio->bi_size)
+ return;
+
+ bio->bi_sector += offset;
+ bio->bi_size = size;
+ offset <<= 9;
+ clear_bit(BIO_SEG_VALID, &bio->bi_flags);
+
+ while (bio->bi_idx < bio->bi_vcnt &&
+ bio->bi_io_vec[bio->bi_idx].bv_len <= offset) {
+ /* remove this whole bio_vec */
+ offset -= bio->bi_io_vec[bio->bi_idx].bv_len;
+ bio->bi_idx++;
+ }
+ if (bio->bi_idx < bio->bi_vcnt) {
+ bio->bi_io_vec[bio->bi_idx].bv_offset += offset;
+ bio->bi_io_vec[bio->bi_idx].bv_len -= offset;
+ }
+ /* avoid any complications with bi_idx being non-zero*/
+ if (bio->bi_idx) {
+ memmove(bio->bi_io_vec, bio->bi_io_vec+bio->bi_idx,
+ (bio->bi_vcnt - bio->bi_idx) * sizeof(struct bio_vec));
+ bio->bi_vcnt -= bio->bi_idx;
+ bio->bi_idx = 0;
+ }
+ /* Make sure vcnt and last bv are not too big */
+ bio_for_each_segment(bvec, bio, i) {
+ if (sofar + bvec->bv_len > size)
+ bvec->bv_len = size - sofar;
+ if (bvec->bv_len == 0) {
+ bio->bi_vcnt = i;
+ break;
+ }
+ sofar += bvec->bv_len;
+ }
+}
+EXPORT_SYMBOL_GPL(md_trim_bio);
+
/*
* We have a system wide 'event count' that is incremented
* on any 'interesting' event, and readers of /proc/mdstat
rdev->sb_start = 0;
rdev->sectors = 0;
}
+ if (rdev->bb_page) {
+ put_page(rdev->bb_page);
+ rdev->bb_page = NULL;
+ }
}
bio->bi_end_io = super_written;
atomic_inc(&mddev->pending_writes);
- submit_bio(REQ_WRITE | REQ_SYNC | REQ_FLUSH | REQ_FUA, bio);
+ submit_bio(WRITE_FLUSH_FUA, bio);
}
void md_super_wait(mddev_t *mddev)
rdev->preferred_minor = sb->md_minor;
rdev->data_offset = 0;
rdev->sb_size = MD_SB_BYTES;
+ rdev->badblocks.shift = -1;
if (sb->level == LEVEL_MULTIPATH)
rdev->desc_nr = -1;
return cpu_to_le32(csum);
}
+static int md_set_badblocks(struct badblocks *bb, sector_t s, int sectors,
+ int acknowledged);
static int super_1_load(mdk_rdev_t *rdev, mdk_rdev_t *refdev, int minor_version)
{
struct mdp_superblock_1 *sb;
else
rdev->desc_nr = le32_to_cpu(sb->dev_number);
+ if (!rdev->bb_page) {
+ rdev->bb_page = alloc_page(GFP_KERNEL);
+ if (!rdev->bb_page)
+ return -ENOMEM;
+ }
+ if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_BAD_BLOCKS) &&
+ rdev->badblocks.count == 0) {
+ /* need to load the bad block list.
+ * Currently we limit it to one page.
+ */
+ s32 offset;
+ sector_t bb_sector;
+ u64 *bbp;
+ int i;
+ int sectors = le16_to_cpu(sb->bblog_size);
+ if (sectors > (PAGE_SIZE / 512))
+ return -EINVAL;
+ offset = le32_to_cpu(sb->bblog_offset);
+ if (offset == 0)
+ return -EINVAL;
+ bb_sector = (long long)offset;
+ if (!sync_page_io(rdev, bb_sector, sectors << 9,
+ rdev->bb_page, READ, true))
+ return -EIO;
+ bbp = (u64 *)page_address(rdev->bb_page);
+ rdev->badblocks.shift = sb->bblog_shift;
+ for (i = 0 ; i < (sectors << (9-3)) ; i++, bbp++) {
+ u64 bb = le64_to_cpu(*bbp);
+ int count = bb & (0x3ff);
+ u64 sector = bb >> 10;
+ sector <<= sb->bblog_shift;
+ count <<= sb->bblog_shift;
+ if (bb + 1 == 0)
+ break;
+ if (md_set_badblocks(&rdev->badblocks,
+ sector, count, 1) == 0)
+ return -EINVAL;
+ }
+ } else if (sb->bblog_offset == 0)
+ rdev->badblocks.shift = -1;
+
if (!refdev) {
ret = 1;
} else {
sb->pad0 = 0;
sb->recovery_offset = cpu_to_le64(0);
memset(sb->pad1, 0, sizeof(sb->pad1));
- memset(sb->pad2, 0, sizeof(sb->pad2));
memset(sb->pad3, 0, sizeof(sb->pad3));
sb->utime = cpu_to_le64((__u64)mddev->utime);
sb->level = cpu_to_le32(mddev->level);
sb->layout = cpu_to_le32(mddev->layout);
+ if (test_bit(WriteMostly, &rdev->flags))
+ sb->devflags |= WriteMostly1;
+ else
+ sb->devflags &= ~WriteMostly1;
+
if (mddev->bitmap && mddev->bitmap_info.file == NULL) {
sb->bitmap_offset = cpu_to_le32((__u32)mddev->bitmap_info.offset);
sb->feature_map = cpu_to_le32(MD_FEATURE_BITMAP_OFFSET);
sb->new_chunk = cpu_to_le32(mddev->new_chunk_sectors);
}
+ if (rdev->badblocks.count == 0)
+ /* Nothing to do for bad blocks*/ ;
+ else if (sb->bblog_offset == 0)
+ /* Cannot record bad blocks on this device */
+ md_error(mddev, rdev);
+ else {
+ struct badblocks *bb = &rdev->badblocks;
+ u64 *bbp = (u64 *)page_address(rdev->bb_page);
+ u64 *p = bb->page;
+ sb->feature_map |= cpu_to_le32(MD_FEATURE_BAD_BLOCKS);
+ if (bb->changed) {
+ unsigned seq;
+
+retry:
+ seq = read_seqbegin(&bb->lock);
+
+ memset(bbp, 0xff, PAGE_SIZE);
+
+ for (i = 0 ; i < bb->count ; i++) {
+ u64 internal_bb = *p++;
+ u64 store_bb = ((BB_OFFSET(internal_bb) << 10)
+ | BB_LEN(internal_bb));
+ *bbp++ = cpu_to_le64(store_bb);
+ }
+ if (read_seqretry(&bb->lock, seq))
+ goto retry;
+
+ bb->sector = (rdev->sb_start +
+ (int)le32_to_cpu(sb->bblog_offset));
+ bb->size = le16_to_cpu(sb->bblog_size);
+ bb->changed = 0;
+ }
+ }
+
max_dev = 0;
list_for_each_entry(rdev2, &mddev->disks, same_set)
if (rdev2->desc_nr+1 > max_dev)
mdk_rdev_t *rdev;
int sync_req;
int nospares = 0;
+ int any_badblocks_changed = 0;
repeat:
/* First make sure individual recovery_offsets are correct */
if (!mddev->persistent) {
clear_bit(MD_CHANGE_CLEAN, &mddev->flags);
clear_bit(MD_CHANGE_DEVS, &mddev->flags);
- if (!mddev->external)
+ if (!mddev->external) {
clear_bit(MD_CHANGE_PENDING, &mddev->flags);
+ list_for_each_entry(rdev, &mddev->disks, same_set) {
+ if (rdev->badblocks.changed) {
+ md_ack_all_badblocks(&rdev->badblocks);
+ md_error(mddev, rdev);
+ }
+ clear_bit(Blocked, &rdev->flags);
+ clear_bit(BlockedBadBlocks, &rdev->flags);
+ wake_up(&rdev->blocked_wait);
+ }
+ }
wake_up(&mddev->sb_wait);
return;
}
MD_BUG();
mddev->events --;
}
+
+ list_for_each_entry(rdev, &mddev->disks, same_set) {
+ if (rdev->badblocks.changed)
+ any_badblocks_changed++;
+ if (test_bit(Faulty, &rdev->flags))
+ set_bit(FaultRecorded, &rdev->flags);
+ }
+
sync_sbs(mddev, nospares);
spin_unlock_irq(&mddev->write_lock);
bdevname(rdev->bdev,b),
(unsigned long long)rdev->sb_start);
rdev->sb_events = mddev->events;
+ if (rdev->badblocks.size) {
+ md_super_write(mddev, rdev,
+ rdev->badblocks.sector,
+ rdev->badblocks.size << 9,
+ rdev->bb_page);
+ rdev->badblocks.size = 0;
+ }
} else
dprintk(")\n");
if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery))
sysfs_notify(&mddev->kobj, NULL, "sync_completed");
+ list_for_each_entry(rdev, &mddev->disks, same_set) {
+ if (test_and_clear_bit(FaultRecorded, &rdev->flags))
+ clear_bit(Blocked, &rdev->flags);
+
+ if (any_badblocks_changed)
+ md_ack_all_badblocks(&rdev->badblocks);
+ clear_bit(BlockedBadBlocks, &rdev->flags);
+ wake_up(&rdev->blocked_wait);
+ }
}
/* words written to sysfs files may, or may not, be \n terminated.
char *sep = "";
size_t len = 0;
- if (test_bit(Faulty, &rdev->flags)) {
+ if (test_bit(Faulty, &rdev->flags) ||
+ rdev->badblocks.unacked_exist) {
len+= sprintf(page+len, "%sfaulty",sep);
sep = ",";
}
len += sprintf(page+len, "%swrite_mostly",sep);
sep = ",";
}
- if (test_bit(Blocked, &rdev->flags)) {
+ if (test_bit(Blocked, &rdev->flags) ||
+ rdev->badblocks.unacked_exist) {
len += sprintf(page+len, "%sblocked", sep);
sep = ",";
}
len += sprintf(page+len, "%sspare", sep);
sep = ",";
}
+ if (test_bit(WriteErrorSeen, &rdev->flags)) {
+ len += sprintf(page+len, "%swrite_error", sep);
+ sep = ",";
+ }
return len+sprintf(page+len, "\n");
}
state_store(mdk_rdev_t *rdev, const char *buf, size_t len)
{
/* can write
- * faulty - simulates and error
+ * faulty - simulates an error
* remove - disconnects the device
* writemostly - sets write_mostly
* -writemostly - clears write_mostly
- * blocked - sets the Blocked flag
- * -blocked - clears the Blocked flag
+ * blocked - sets the Blocked flags
+ * -blocked - clears the Blocked and possibly simulates an error
* insync - sets Insync providing device isn't active
+ * write_error - sets WriteErrorSeen
+ * -write_error - clears WriteErrorSeen
*/
int err = -EINVAL;
if (cmd_match(buf, "faulty") && rdev->mddev->pers) {
md_error(rdev->mddev, rdev);
- err = 0;
+ if (test_bit(Faulty, &rdev->flags))
+ err = 0;
+ else
+ err = -EBUSY;
} else if (cmd_match(buf, "remove")) {
if (rdev->raid_disk >= 0)
err = -EBUSY;
set_bit(Blocked, &rdev->flags);
err = 0;
} else if (cmd_match(buf, "-blocked")) {
+ if (!test_bit(Faulty, &rdev->flags) &&
+ rdev->badblocks.unacked_exist) {
+ /* metadata handler doesn't understand badblocks,
+ * so we need to fail the device
+ */
+ md_error(rdev->mddev, rdev);
+ }
clear_bit(Blocked, &rdev->flags);
+ clear_bit(BlockedBadBlocks, &rdev->flags);
wake_up(&rdev->blocked_wait);
set_bit(MD_RECOVERY_NEEDED, &rdev->mddev->recovery);
md_wakeup_thread(rdev->mddev->thread);
} else if (cmd_match(buf, "insync") && rdev->raid_disk == -1) {
set_bit(In_sync, &rdev->flags);
err = 0;
+ } else if (cmd_match(buf, "write_error")) {
+ set_bit(WriteErrorSeen, &rdev->flags);
+ err = 0;
+ } else if (cmd_match(buf, "-write_error")) {
+ clear_bit(WriteErrorSeen, &rdev->flags);
+ err = 0;
}
if (!err)
sysfs_notify_dirent_safe(rdev->sysfs_state);
static struct rdev_sysfs_entry rdev_recovery_start =
__ATTR(recovery_start, S_IRUGO|S_IWUSR, recovery_start_show, recovery_start_store);
+
+static ssize_t
+badblocks_show(struct badblocks *bb, char *page, int unack);
+static ssize_t
+badblocks_store(struct badblocks *bb, const char *page, size_t len, int unack);
+
+static ssize_t bb_show(mdk_rdev_t *rdev, char *page)
+{
+ return badblocks_show(&rdev->badblocks, page, 0);
+}
+static ssize_t bb_store(mdk_rdev_t *rdev, const char *page, size_t len)
+{
+ int rv = badblocks_store(&rdev->badblocks, page, len, 0);
+ /* Maybe that ack was all we needed */
+ if (test_and_clear_bit(BlockedBadBlocks, &rdev->flags))
+ wake_up(&rdev->blocked_wait);
+ return rv;
+}
+static struct rdev_sysfs_entry rdev_bad_blocks =
+__ATTR(bad_blocks, S_IRUGO|S_IWUSR, bb_show, bb_store);
+
+
+static ssize_t ubb_show(mdk_rdev_t *rdev, char *page)
+{
+ return badblocks_show(&rdev->badblocks, page, 1);
+}
+static ssize_t ubb_store(mdk_rdev_t *rdev, const char *page, size_t len)
+{
+ return badblocks_store(&rdev->badblocks, page, len, 1);
+}
+static struct rdev_sysfs_entry rdev_unack_bad_blocks =
+__ATTR(unacknowledged_bad_blocks, S_IRUGO|S_IWUSR, ubb_show, ubb_store);
+
static struct attribute *rdev_default_attrs[] = {
&rdev_state.attr,
&rdev_errors.attr,
&rdev_offset.attr,
&rdev_size.attr,
&rdev_recovery_start.attr,
+ &rdev_bad_blocks.attr,
+ &rdev_unack_bad_blocks.attr,
NULL,
};
static ssize_t
rdev->sb_events = 0;
rdev->last_read_error.tv_sec = 0;
rdev->last_read_error.tv_nsec = 0;
+ rdev->sb_loaded = 0;
+ rdev->bb_page = NULL;
atomic_set(&rdev->nr_pending, 0);
atomic_set(&rdev->read_errors, 0);
atomic_set(&rdev->corrected_errors, 0);
goto abort_free;
}
}
+ if (super_format == -1)
+ /* hot-add for 0.90, or non-persistent: so no badblocks */
+ rdev->badblocks.shift = -1;
return rdev;
abort_free:
- if (rdev->sb_page) {
- if (rdev->bdev)
- unlock_rdev(rdev);
- free_disk_sb(rdev);
- }
+ if (rdev->bdev)
+ unlock_rdev(rdev);
+ free_disk_sb(rdev);
kfree(rdev->badblocks.page);
kfree(rdev);
return ERR_PTR(err);
return -ENODEV;
md_error(mddev, rdev);
+ if (!test_bit(Faulty, &rdev->flags))
+ return -EBUSY;
return 0;
}
if (!rdev || test_bit(Faulty, &rdev->flags))
return;
- if (mddev->external)
- set_bit(Blocked, &rdev->flags);
-/*
- dprintk("md_error dev:%s, rdev:(%d:%d), (caller: %p,%p,%p,%p).\n",
- mdname(mddev),
- MAJOR(rdev->bdev->bd_dev), MINOR(rdev->bdev->bd_dev),
- __builtin_return_address(0),__builtin_return_address(1),
- __builtin_return_address(2),__builtin_return_address(3));
-*/
- if (!mddev->pers)
- return;
- if (!mddev->pers->error_handler)
+ if (!mddev->pers || !mddev->pers->error_handler)
return;
mddev->pers->error_handler(mddev,rdev);
if (mddev->degraded)
mddev_put(mddev);
}
-struct mdstat_info {
- int event;
-};
-
static int md_seq_show(struct seq_file *seq, void *v)
{
mddev_t *mddev = v;
sector_t sectors;
mdk_rdev_t *rdev;
- struct mdstat_info *mi = seq->private;
struct bitmap *bitmap;
if (v == (void*)1) {
spin_unlock(&pers_lock);
seq_printf(seq, "\n");
- mi->event = atomic_read(&md_event_count);
+ seq->poll_event = atomic_read(&md_event_count);
return 0;
}
if (v == (void*)2) {
static int md_seq_open(struct inode *inode, struct file *file)
{
+ struct seq_file *seq;
int error;
- struct mdstat_info *mi = kmalloc(sizeof(*mi), GFP_KERNEL);
- if (mi == NULL)
- return -ENOMEM;
error = seq_open(file, &md_seq_ops);
if (error)
- kfree(mi);
- else {
- struct seq_file *p = file->private_data;
- p->private = mi;
- mi->event = atomic_read(&md_event_count);
- }
+ return error;
+
+ seq = file->private_data;
+ seq->poll_event = atomic_read(&md_event_count);
return error;
}
static unsigned int mdstat_poll(struct file *filp, poll_table *wait)
{
- struct seq_file *m = filp->private_data;
- struct mdstat_info *mi = m->private;
+ struct seq_file *seq = filp->private_data;
int mask;
poll_wait(filp, &md_event_waiters, wait);
/* always allow read */
mask = POLLIN | POLLRDNORM;
- if (mi->event != atomic_read(&md_event_count))
+ if (seq->poll_event != atomic_read(&md_event_count))
mask |= POLLERR | POLLPRI;
return mask;
}
atomic_add(sectors, &mddev->recovery_active);
}
+ if (test_bit(MD_RECOVERY_INTR, &mddev->recovery))
+ break;
+
j += sectors;
if (j>1) mddev->curr_resync = j;
mddev->curr_mark_cnt = io_sectors;
if (last_check == 0)
- /* this is the earliers that rebuilt will be
+ /* this is the earliest that rebuild will be
* visible in /proc/mdstat
*/
md_new_event(mddev);
continue;
last_check = io_sectors;
-
- if (test_bit(MD_RECOVERY_INTR, &mddev->recovery))
- break;
-
repeat:
if (time_after_eq(jiffies, mark[last_mark] + SYNC_MARK_STEP )) {
/* step marks */
list_for_each_entry(rdev, &mddev->disks, same_set) {
if (rdev->raid_disk >= 0 &&
!test_bit(In_sync, &rdev->flags) &&
- !test_bit(Faulty, &rdev->flags) &&
- !test_bit(Blocked, &rdev->flags))
+ !test_bit(Faulty, &rdev->flags))
spares++;
if (rdev->raid_disk < 0
&& !test_bit(Faulty, &rdev->flags)) {
{
sysfs_notify_dirent_safe(rdev->sysfs_state);
wait_event_timeout(rdev->blocked_wait,
- !test_bit(Blocked, &rdev->flags),
+ !test_bit(Blocked, &rdev->flags) &&
+ !test_bit(BlockedBadBlocks, &rdev->flags),
msecs_to_jiffies(5000));
rdev_dec_pending(rdev, mddev);
}
}
bb->changed = 1;
+ if (!acknowledged)
+ bb->unacked_exist = 1;
write_sequnlock_irq(&bb->lock);
return rv;
p[i] = BB_MAKE(start, len, 1);
}
}
+ bb->unacked_exist = 0;
}
write_sequnlock_irq(&bb->lock);
}
EXPORT_SYMBOL_GPL(md_ack_all_badblocks);
+/* sysfs access to bad-blocks list.
+ * We present two files.
+ * 'bad-blocks' lists sector numbers and lengths of ranges that
+ * are recorded as bad. The list is truncated to fit within
+ * the one-page limit of sysfs.
+ * Writing "sector length" to this file adds an acknowledged
+ * bad block list.
+ * 'unacknowledged-bad-blocks' lists bad blocks that have not yet
+ * been acknowledged. Writing to this file adds bad blocks
+ * without acknowledging them. This is largely for testing.
+ */
+
+static ssize_t
+badblocks_show(struct badblocks *bb, char *page, int unack)
+{
+ size_t len;
+ int i;
+ u64 *p = bb->page;
+ unsigned seq;
+
+ if (bb->shift < 0)
+ return 0;
+
+retry:
+ seq = read_seqbegin(&bb->lock);
+
+ len = 0;
+ i = 0;
+
+ while (len < PAGE_SIZE && i < bb->count) {
+ sector_t s = BB_OFFSET(p[i]);
+ unsigned int length = BB_LEN(p[i]);
+ int ack = BB_ACK(p[i]);
+ i++;
+
+ if (unack && ack)
+ continue;
+
+ len += snprintf(page+len, PAGE_SIZE-len, "%llu %u\n",
+ (unsigned long long)s << bb->shift,
+ length << bb->shift);
+ }
+ if (unack && len == 0)
+ bb->unacked_exist = 0;
+
+ if (read_seqretry(&bb->lock, seq))
+ goto retry;
+
+ return len;
+}
+
+#define DO_DEBUG 1
+
+static ssize_t
+badblocks_store(struct badblocks *bb, const char *page, size_t len, int unack)
+{
+ unsigned long long sector;
+ int length;
+ char newline;
+#ifdef DO_DEBUG
+ /* Allow clearing via sysfs *only* for testing/debugging.
+ * Normally only a successful write may clear a badblock
+ */
+ int clear = 0;
+ if (page[0] == '-') {
+ clear = 1;
+ page++;
+ }
+#endif /* DO_DEBUG */
+
+ switch (sscanf(page, "%llu %d%c", §or, &length, &newline)) {
+ case 3:
+ if (newline != '\n')
+ return -EINVAL;
+ case 2:
+ if (length <= 0)
+ return -EINVAL;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+#ifdef DO_DEBUG
+ if (clear) {
+ md_clear_badblocks(bb, sector, length);
+ return len;
+ }
+#endif /* DO_DEBUG */
+ if (md_set_badblocks(bb, sector, length, !unack))
+ return len;
+ else
+ return -ENOSPC;
+}
+
static int md_notify_reboot(struct notifier_block *this,
unsigned long code, void *x)
{
projects / deliverable / linux.git / blobdiff