diff options
Diffstat (limited to 'drivers/md/md.c')
-rw-r--r-- | drivers/md/md.c | 275 |
1 files changed, 122 insertions, 153 deletions
diff --git a/drivers/md/md.c b/drivers/md/md.c index 8dbab2ef3885..38a0a5741d52 100644 --- a/drivers/md/md.c +++ b/drivers/md/md.c @@ -389,8 +389,12 @@ static int super_written(struct bio *bio, unsigned int bytes_done, int error) if (bio->bi_size) return 1; - if (error || !test_bit(BIO_UPTODATE, &bio->bi_flags)) + if (error || !test_bit(BIO_UPTODATE, &bio->bi_flags)) { + printk("md: super_written gets error=%d, uptodate=%d\n", + error, test_bit(BIO_UPTODATE, &bio->bi_flags)); + WARN_ON(test_bit(BIO_UPTODATE, &bio->bi_flags)); md_error(mddev, rdev); + } if (atomic_dec_and_test(&mddev->pending_writes)) wake_up(&mddev->sb_wait); @@ -1587,7 +1591,7 @@ static void sync_sbs(mddev_t * mddev, int nospares) } } -void md_update_sb(mddev_t * mddev) +static void md_update_sb(mddev_t * mddev, int force_change) { int err; struct list_head *tmp; @@ -1598,7 +1602,18 @@ void md_update_sb(mddev_t * mddev) repeat: spin_lock_irq(&mddev->write_lock); - if (mddev->degraded && mddev->sb_dirty == 3) + set_bit(MD_CHANGE_PENDING, &mddev->flags); + if (test_and_clear_bit(MD_CHANGE_DEVS, &mddev->flags)) + force_change = 1; + if (test_and_clear_bit(MD_CHANGE_CLEAN, &mddev->flags)) + /* just a clean<-> dirty transition, possibly leave spares alone, + * though if events isn't the right even/odd, we will have to do + * spares after all + */ + nospares = 1; + if (force_change) + nospares = 0; + if (mddev->degraded) /* If the array is degraded, then skipping spares is both * dangerous and fairly pointless. * Dangerous because a device that was removed from the array @@ -1608,20 +1623,14 @@ repeat: * then a recovery will happen and soon that array won't * be degraded any more and the spare can go back to sleep then. */ - mddev->sb_dirty = 1; + nospares = 0; sync_req = mddev->in_sync; mddev->utime = get_seconds(); - if (mddev->sb_dirty == 3) - /* just a clean<-> dirty transition, possibly leave spares alone, - * though if events isn't the right even/odd, we will have to do - * spares after all - */ - nospares = 1; /* If this is just a dirty<->clean transition, and the array is clean * and 'events' is odd, we can roll back to the previous clean state */ - if (mddev->sb_dirty == 3 + if (nospares && (mddev->in_sync && mddev->recovery_cp == MaxSector) && (mddev->events & 1)) mddev->events--; @@ -1652,7 +1661,6 @@ repeat: MD_BUG(); mddev->events --; } - mddev->sb_dirty = 2; sync_sbs(mddev, nospares); /* @@ -1660,7 +1668,7 @@ repeat: * nonpersistent superblocks */ if (!mddev->persistent) { - mddev->sb_dirty = 0; + clear_bit(MD_CHANGE_PENDING, &mddev->flags); spin_unlock_irq(&mddev->write_lock); wake_up(&mddev->sb_wait); return; @@ -1697,20 +1705,20 @@ repeat: break; } md_super_wait(mddev); - /* if there was a failure, sb_dirty was set to 1, and we re-write super */ + /* if there was a failure, MD_CHANGE_DEVS was set, and we re-write super */ spin_lock_irq(&mddev->write_lock); - if (mddev->in_sync != sync_req|| mddev->sb_dirty == 1) { + if (mddev->in_sync != sync_req || + test_bit(MD_CHANGE_DEVS, &mddev->flags)) { /* have to write it out again */ spin_unlock_irq(&mddev->write_lock); goto repeat; } - mddev->sb_dirty = 0; + clear_bit(MD_CHANGE_PENDING, &mddev->flags); spin_unlock_irq(&mddev->write_lock); wake_up(&mddev->sb_wait); } -EXPORT_SYMBOL_GPL(md_update_sb); /* words written to sysfs files may, or my not, be \n terminated. * We want to accept with case. For this we use cmd_match. @@ -1783,7 +1791,7 @@ state_store(mdk_rdev_t *rdev, const char *buf, size_t len) else { mddev_t *mddev = rdev->mddev; kick_rdev_from_array(rdev); - md_update_sb(mddev); + md_update_sb(mddev, 1); md_new_event(mddev); err = 0; } @@ -2426,7 +2434,7 @@ array_state_store(mddev_t *mddev, const char *buf, size_t len) spin_lock_irq(&mddev->write_lock); if (atomic_read(&mddev->writes_pending) == 0) { mddev->in_sync = 1; - mddev->sb_dirty = 1; + set_bit(MD_CHANGE_CLEAN, &mddev->flags); } spin_unlock_irq(&mddev->write_lock); } else { @@ -2438,7 +2446,7 @@ array_state_store(mddev_t *mddev, const char *buf, size_t len) case active: if (mddev->pers) { restart_array(mddev); - mddev->sb_dirty = 0; + clear_bit(MD_CHANGE_CLEAN, &mddev->flags); wake_up(&mddev->sb_wait); err = 0; } else { @@ -2520,6 +2528,36 @@ static struct md_sysfs_entry md_new_device = __ATTR(new_dev, S_IWUSR, null_show, new_dev_store); static ssize_t +bitmap_store(mddev_t *mddev, const char *buf, size_t len) +{ + char *end; + unsigned long chunk, end_chunk; + + if (!mddev->bitmap) + goto out; + /* buf should be <chunk> <chunk> ... or <chunk>-<chunk> ... (range) */ + while (*buf) { + chunk = end_chunk = simple_strtoul(buf, &end, 0); + if (buf == end) break; + if (*end == '-') { /* range */ + buf = end + 1; + end_chunk = simple_strtoul(buf, &end, 0); + if (buf == end) break; + } + if (*end && !isspace(*end)) break; + bitmap_dirty_bits(mddev->bitmap, chunk, end_chunk); + buf = end; + while (isspace(*buf)) buf++; + } + bitmap_unplug(mddev->bitmap); /* flush the bits to disk */ +out: + return len; +} + +static struct md_sysfs_entry md_bitmap = +__ATTR(bitmap_set_bits, S_IWUSR, null_show, bitmap_store); + +static ssize_t size_show(mddev_t *mddev, char *page) { return sprintf(page, "%llu\n", (unsigned long long)mddev->size); @@ -2543,7 +2581,7 @@ size_store(mddev_t *mddev, const char *buf, size_t len) if (mddev->pers) { err = update_size(mddev, size); - md_update_sb(mddev); + md_update_sb(mddev, 1); } else { if (mddev->size == 0 || mddev->size > size) @@ -2839,6 +2877,7 @@ static struct attribute *md_redundancy_attrs[] = { &md_sync_completed.attr, &md_suspend_lo.attr, &md_suspend_hi.attr, + &md_bitmap.attr, NULL, }; static struct attribute_group md_redundancy_group = { @@ -3111,8 +3150,8 @@ static int do_md_run(mddev_t * mddev) set_bit(MD_RECOVERY_NEEDED, &mddev->recovery); - if (mddev->sb_dirty) - md_update_sb(mddev); + if (mddev->flags) + md_update_sb(mddev, 0); set_capacity(disk, mddev->array_size<<1); @@ -3275,10 +3314,10 @@ static int do_md_stop(mddev_t * mddev, int mode) if (mddev->ro) mddev->ro = 0; } - if (!mddev->in_sync || mddev->sb_dirty) { + if (!mddev->in_sync || mddev->flags) { /* mark array as shutdown cleanly */ mddev->in_sync = 1; - md_update_sb(mddev); + md_update_sb(mddev, 1); } if (mode == 1) set_disk_ro(disk, 1); @@ -3374,6 +3413,7 @@ static void autorun_devices(int part) printk(KERN_INFO "md: autorun ...\n"); while (!list_empty(&pending_raid_disks)) { + int unit; dev_t dev; LIST_HEAD(candidates); rdev0 = list_entry(pending_raid_disks.next, @@ -3393,16 +3433,19 @@ static void autorun_devices(int part) * mostly sane superblocks. It's time to allocate the * mddev. */ - if (rdev0->preferred_minor < 0 || rdev0->preferred_minor >= MAX_MD_DEVS) { + if (part) { + dev = MKDEV(mdp_major, + rdev0->preferred_minor << MdpMinorShift); + unit = MINOR(dev) >> MdpMinorShift; + } else { + dev = MKDEV(MD_MAJOR, rdev0->preferred_minor); + unit = MINOR(dev); + } + if (rdev0->preferred_minor != unit) { printk(KERN_INFO "md: unit number in %s is bad: %d\n", bdevname(rdev0->bdev, b), rdev0->preferred_minor); break; } - if (part) - dev = MKDEV(mdp_major, - rdev0->preferred_minor << MdpMinorShift); - else - dev = MKDEV(MD_MAJOR, rdev0->preferred_minor); md_probe(dev, NULL, NULL); mddev = mddev_find(dev); @@ -3440,67 +3483,6 @@ static void autorun_devices(int part) printk(KERN_INFO "md: ... autorun DONE.\n"); } -/* - * import RAID devices based on one partition - * if possible, the array gets run as well. - */ - -static int autostart_array(dev_t startdev) -{ - char b[BDEVNAME_SIZE]; - int err = -EINVAL, i; - mdp_super_t *sb = NULL; - mdk_rdev_t *start_rdev = NULL, *rdev; - - start_rdev = md_import_device(startdev, 0, 0); - if (IS_ERR(start_rdev)) - return err; - - - /* NOTE: this can only work for 0.90.0 superblocks */ - sb = (mdp_super_t*)page_address(start_rdev->sb_page); - if (sb->major_version != 0 || - sb->minor_version != 90 ) { - printk(KERN_WARNING "md: can only autostart 0.90.0 arrays\n"); - export_rdev(start_rdev); - return err; - } - - if (test_bit(Faulty, &start_rdev->flags)) { - printk(KERN_WARNING - "md: can not autostart based on faulty %s!\n", - bdevname(start_rdev->bdev,b)); - export_rdev(start_rdev); - return err; - } - list_add(&start_rdev->same_set, &pending_raid_disks); - - for (i = 0; i < MD_SB_DISKS; i++) { - mdp_disk_t *desc = sb->disks + i; - dev_t dev = MKDEV(desc->major, desc->minor); - - if (!dev) - continue; - if (dev == startdev) - continue; - if (MAJOR(dev) != desc->major || MINOR(dev) != desc->minor) - continue; - rdev = md_import_device(dev, 0, 0); - if (IS_ERR(rdev)) - continue; - - list_add(&rdev->same_set, &pending_raid_disks); - } - - /* - * possibly return codes - */ - autorun_devices(0); - return 0; - -} - - static int get_version(void __user * arg) { mdu_version_t ver; @@ -3808,7 +3790,7 @@ static int hot_remove_disk(mddev_t * mddev, dev_t dev) goto busy; kick_rdev_from_array(rdev); - md_update_sb(mddev); + md_update_sb(mddev, 1); md_new_event(mddev); return 0; @@ -3885,7 +3867,7 @@ static int hot_add_disk(mddev_t * mddev, dev_t dev) rdev->raid_disk = -1; - md_update_sb(mddev); + md_update_sb(mddev, 1); /* * Kick recovery, maybe this spare has to be added to the @@ -4016,7 +3998,8 @@ static int set_array_info(mddev_t * mddev, mdu_array_info_t *info) mddev->max_disks = MD_SB_DISKS; - mddev->sb_dirty = 1; + mddev->flags = 0; + set_bit(MD_CHANGE_DEVS, &mddev->flags); mddev->default_bitmap_offset = MD_SB_BYTES >> 9; mddev->bitmap_offset = 0; @@ -4185,7 +4168,7 @@ static int update_array_info(mddev_t *mddev, mdu_array_info_t *info) mddev->bitmap_offset = 0; } } - md_update_sb(mddev); + md_update_sb(mddev, 1); return rv; } @@ -4259,27 +4242,6 @@ static int md_ioctl(struct inode *inode, struct file *file, goto abort; } - - if (cmd == START_ARRAY) { - /* START_ARRAY doesn't need to lock the array as autostart_array - * does the locking, and it could even be a different array - */ - static int cnt = 3; - if (cnt > 0 ) { - printk(KERN_WARNING - "md: %s(pid %d) used deprecated START_ARRAY ioctl. " - "This will not be supported beyond July 2006\n", - current->comm, current->pid); - cnt--; - } - err = autostart_array(new_decode_dev(arg)); - if (err) { - printk(KERN_WARNING "md: autostart failed!\n"); - goto abort; - } - goto done; - } - err = mddev_lock(mddev); if (err) { printk(KERN_INFO @@ -4687,9 +4649,11 @@ static void status_resync(struct seq_file *seq, mddev_t * mddev) seq_printf(seq, " %s =%3u.%u%% (%llu/%llu)", (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery)? "reshape" : - (test_bit(MD_RECOVERY_SYNC, &mddev->recovery) ? - "resync" : "recovery")), - per_milli/10, per_milli % 10, + (test_bit(MD_RECOVERY_CHECK, &mddev->recovery)? + "check" : + (test_bit(MD_RECOVERY_SYNC, &mddev->recovery) ? + "resync" : "recovery"))), + per_milli/10, per_milli % 10, (unsigned long long) resync, (unsigned long long) max_blocks); @@ -5042,12 +5006,12 @@ void md_write_start(mddev_t *mddev, struct bio *bi) spin_lock_irq(&mddev->write_lock); if (mddev->in_sync) { mddev->in_sync = 0; - mddev->sb_dirty = 3; + set_bit(MD_CHANGE_CLEAN, &mddev->flags); md_wakeup_thread(mddev->thread); } spin_unlock_irq(&mddev->write_lock); } - wait_event(mddev->sb_wait, mddev->sb_dirty==0); + wait_event(mddev->sb_wait, mddev->flags==0); } void md_write_end(mddev_t *mddev) @@ -5078,6 +5042,7 @@ void md_do_sync(mddev_t *mddev) int skipped = 0; struct list_head *rtmp; mdk_rdev_t *rdev; + char *desc; /* just incase thread restarts... */ if (test_bit(MD_RECOVERY_DONE, &mddev->recovery)) @@ -5085,6 +5050,18 @@ void md_do_sync(mddev_t *mddev) if (mddev->ro) /* never try to sync a read-only array */ return; + if (test_bit(MD_RECOVERY_SYNC, &mddev->recovery)) { + if (test_bit(MD_RECOVERY_CHECK, &mddev->recovery)) + desc = "data-check"; + else if (test_bit(MD_RECOVERY_REQUESTED, &mddev->recovery)) + desc = "requested-resync"; + else + desc = "resync"; + } else if (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery)) + desc = "reshape"; + else + desc = "recovery"; + /* we overload curr_resync somewhat here. * 0 == not engaged in resync at all * 2 == checking that there is no conflict with another sync @@ -5128,10 +5105,10 @@ void md_do_sync(mddev_t *mddev) prepare_to_wait(&resync_wait, &wq, TASK_UNINTERRUPTIBLE); if (!kthread_should_stop() && mddev2->curr_resync >= mddev->curr_resync) { - printk(KERN_INFO "md: delaying resync of %s" - " until %s has finished resync (they" + printk(KERN_INFO "md: delaying %s of %s" + " until %s has finished (they" " share one or more physical units)\n", - mdname(mddev), mdname(mddev2)); + desc, mdname(mddev), mdname(mddev2)); mddev_put(mddev2); schedule(); finish_wait(&resync_wait, &wq); @@ -5167,12 +5144,12 @@ void md_do_sync(mddev_t *mddev) j = rdev->recovery_offset; } - printk(KERN_INFO "md: syncing RAID array %s\n", mdname(mddev)); - printk(KERN_INFO "md: minimum _guaranteed_ reconstruction speed:" - " %d KB/sec/disc.\n", speed_min(mddev)); + printk(KERN_INFO "md: %s of RAID array %s\n", desc, mdname(mddev)); + printk(KERN_INFO "md: minimum _guaranteed_ speed:" + " %d KB/sec/disk.\n", speed_min(mddev)); printk(KERN_INFO "md: using maximum available idle IO bandwidth " - "(but not more than %d KB/sec) for reconstruction.\n", - speed_max(mddev)); + "(but not more than %d KB/sec) for %s.\n", + speed_max(mddev), desc); is_mddev_idle(mddev); /* this also initializes IO event counters */ @@ -5198,8 +5175,8 @@ void md_do_sync(mddev_t *mddev) if (j>2) { printk(KERN_INFO - "md: resuming recovery of %s from checkpoint.\n", - mdname(mddev)); + "md: resuming %s of %s from checkpoint.\n", + desc, mdname(mddev)); mddev->curr_resync = j; } @@ -5282,7 +5259,7 @@ void md_do_sync(mddev_t *mddev) } } } - printk(KERN_INFO "md: %s: sync done.\n",mdname(mddev)); + printk(KERN_INFO "md: %s: %s done.\n",mdname(mddev), desc); /* * this also signals 'finished resyncing' to md_stop */ @@ -5302,8 +5279,8 @@ void md_do_sync(mddev_t *mddev) if (test_bit(MD_RECOVERY_INTR, &mddev->recovery)) { if (mddev->curr_resync >= mddev->recovery_cp) { printk(KERN_INFO - "md: checkpointing recovery of %s.\n", - mdname(mddev)); + "md: checkpointing %s of %s.\n", + desc, mdname(mddev)); mddev->recovery_cp = mddev->curr_resync; } } else @@ -5317,7 +5294,6 @@ void md_do_sync(mddev_t *mddev) !test_bit(In_sync, &rdev->flags) && rdev->recovery_offset < mddev->curr_resync) rdev->recovery_offset = mddev->curr_resync; - mddev->sb_dirty = 1; } } @@ -5374,7 +5350,7 @@ void md_check_recovery(mddev_t *mddev) } if ( ! ( - mddev->sb_dirty || + mddev->flags || test_bit(MD_RECOVERY_NEEDED, &mddev->recovery) || test_bit(MD_RECOVERY_DONE, &mddev->recovery) || (mddev->safemode == 1) || @@ -5390,14 +5366,14 @@ void md_check_recovery(mddev_t *mddev) if (mddev->safemode && !atomic_read(&mddev->writes_pending) && !mddev->in_sync && mddev->recovery_cp == MaxSector) { mddev->in_sync = 1; - mddev->sb_dirty = 3; + set_bit(MD_CHANGE_CLEAN, &mddev->flags); } if (mddev->safemode == 1) mddev->safemode = 0; spin_unlock_irq(&mddev->write_lock); - if (mddev->sb_dirty) - md_update_sb(mddev); + if (mddev->flags) + md_update_sb(mddev, 0); if (test_bit(MD_RECOVERY_RUNNING, &mddev->recovery) && @@ -5416,7 +5392,7 @@ void md_check_recovery(mddev_t *mddev) /* activate any spares */ mddev->pers->spare_active(mddev); } - md_update_sb(mddev); + md_update_sb(mddev, 1); /* if array is no-longer degraded, then any saved_raid_disk * information must be scrapped @@ -5556,22 +5532,15 @@ static void md_geninit(void) static int __init md_init(void) { - printk(KERN_INFO "md: md driver %d.%d.%d MAX_MD_DEVS=%d," - " MD_SB_DISKS=%d\n", - MD_MAJOR_VERSION, MD_MINOR_VERSION, - MD_PATCHLEVEL_VERSION, MAX_MD_DEVS, MD_SB_DISKS); - printk(KERN_INFO "md: bitmap version %d.%d\n", BITMAP_MAJOR_HI, - BITMAP_MINOR); - if (register_blkdev(MAJOR_NR, "md")) return -1; if ((mdp_major=register_blkdev(0, "mdp"))<=0) { unregister_blkdev(MAJOR_NR, "md"); return -1; } - blk_register_region(MKDEV(MAJOR_NR, 0), MAX_MD_DEVS, THIS_MODULE, - md_probe, NULL, NULL); - blk_register_region(MKDEV(mdp_major, 0), MAX_MD_DEVS<<MdpMinorShift, THIS_MODULE, + blk_register_region(MKDEV(MAJOR_NR, 0), 1UL<<MINORBITS, THIS_MODULE, + md_probe, NULL, NULL); + blk_register_region(MKDEV(mdp_major, 0), 1UL<<MINORBITS, THIS_MODULE, md_probe, NULL, NULL); register_reboot_notifier(&md_notifier); @@ -5630,8 +5599,8 @@ static __exit void md_exit(void) mddev_t *mddev; struct list_head *tmp; - blk_unregister_region(MKDEV(MAJOR_NR,0), MAX_MD_DEVS); - blk_unregister_region(MKDEV(mdp_major,0), MAX_MD_DEVS << MdpMinorShift); + blk_unregister_region(MKDEV(MAJOR_NR,0), 1U << MINORBITS); + blk_unregister_region(MKDEV(mdp_major,0), 1U << MINORBITS); unregister_blkdev(MAJOR_NR,"md"); unregister_blkdev(mdp_major, "mdp"); |