forked from Minki/linux
md: collect bitmap-specific fields into one structure.
In preparation for making bitmap fields configurable via sysfs, start tidying up by making a single structure to contain the configuration fields. Signed-off-by: NeilBrown <neilb@suse.de>
This commit is contained in:
NeilBrown
parent
709ae4879a
commit
c3d9714e88
@ -1090,10 +1090,10 @@ void bitmap_daemon_work(mddev_t *mddev)
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/* Use a mutex to guard daemon_work against
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* bitmap_destroy.
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*/
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mutex_lock(&mddev->bitmap_mutex);
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mutex_lock(&mddev->bitmap_info.mutex);
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bitmap = mddev->bitmap;
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if (bitmap == NULL) {
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mutex_unlock(&mddev->bitmap_mutex);
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mutex_unlock(&mddev->bitmap_info.mutex);
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return;
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}
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if (time_before(jiffies, bitmap->daemon_lastrun + bitmap->daemon_sleep*HZ))
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@ -1211,7 +1211,7 @@ void bitmap_daemon_work(mddev_t *mddev)
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done:
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if (bitmap->allclean == 0)
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bitmap->mddev->thread->timeout = bitmap->daemon_sleep * HZ;
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mutex_unlock(&mddev->bitmap_mutex);
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mutex_unlock(&mddev->bitmap_info.mutex);
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}
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static bitmap_counter_t *bitmap_get_counter(struct bitmap *bitmap,
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@ -1591,9 +1591,9 @@ void bitmap_destroy(mddev_t *mddev)
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if (!bitmap) /* there was no bitmap */
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return;
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mutex_lock(&mddev->bitmap_mutex);
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mutex_lock(&mddev->bitmap_info.mutex);
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mddev->bitmap = NULL; /* disconnect from the md device */
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mutex_unlock(&mddev->bitmap_mutex);
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mutex_unlock(&mddev->bitmap_info.mutex);
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if (mddev->thread)
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mddev->thread->timeout = MAX_SCHEDULE_TIMEOUT;
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@ -1610,16 +1610,16 @@ int bitmap_create(mddev_t *mddev)
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sector_t blocks = mddev->resync_max_sectors;
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unsigned long chunks;
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unsigned long pages;
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struct file *file = mddev->bitmap_file;
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struct file *file = mddev->bitmap_info.file;
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int err;
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sector_t start;
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BUILD_BUG_ON(sizeof(bitmap_super_t) != 256);
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if (!file && !mddev->bitmap_offset) /* bitmap disabled, nothing to do */
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if (!file && !mddev->bitmap_info.offset) /* bitmap disabled, nothing to do */
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return 0;
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BUG_ON(file && mddev->bitmap_offset);
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BUG_ON(file && mddev->bitmap_info.offset);
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bitmap = kzalloc(sizeof(*bitmap), GFP_KERNEL);
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if (!bitmap)
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@ -1633,7 +1633,7 @@ int bitmap_create(mddev_t *mddev)
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bitmap->mddev = mddev;
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bitmap->file = file;
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bitmap->offset = mddev->bitmap_offset;
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bitmap->offset = mddev->bitmap_info.offset;
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if (file) {
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get_file(file);
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/* As future accesses to this file will use bmap,
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@ -463,7 +463,7 @@ static mddev_t * mddev_find(dev_t unit)
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mutex_init(&new->open_mutex);
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mutex_init(&new->reconfig_mutex);
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mutex_init(&new->bitmap_mutex);
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mutex_init(&new->bitmap_info.mutex);
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INIT_LIST_HEAD(&new->disks);
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INIT_LIST_HEAD(&new->all_mddevs);
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init_timer(&new->safemode_timer);
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@ -850,7 +850,7 @@ struct super_type {
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*/
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int md_check_no_bitmap(mddev_t *mddev)
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{
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if (!mddev->bitmap_file && !mddev->bitmap_offset)
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if (!mddev->bitmap_info.file && !mddev->bitmap_info.offset)
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return 0;
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printk(KERN_ERR "%s: bitmaps are not supported for %s\n",
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mdname(mddev), mddev->pers->name);
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@ -978,8 +978,8 @@ static int super_90_validate(mddev_t *mddev, mdk_rdev_t *rdev)
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mddev->raid_disks = sb->raid_disks;
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mddev->dev_sectors = sb->size * 2;
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mddev->events = ev1;
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mddev->bitmap_offset = 0;
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mddev->default_bitmap_offset = MD_SB_BYTES >> 9;
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mddev->bitmap_info.offset = 0;
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mddev->bitmap_info.default_offset = MD_SB_BYTES >> 9;
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if (mddev->minor_version >= 91) {
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mddev->reshape_position = sb->reshape_position;
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@ -1013,8 +1013,9 @@ static int super_90_validate(mddev_t *mddev, mdk_rdev_t *rdev)
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mddev->max_disks = MD_SB_DISKS;
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if (sb->state & (1<<MD_SB_BITMAP_PRESENT) &&
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mddev->bitmap_file == NULL)
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mddev->bitmap_offset = mddev->default_bitmap_offset;
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mddev->bitmap_info.file == NULL)
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mddev->bitmap_info.offset =
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mddev->bitmap_info.default_offset;
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} else if (mddev->pers == NULL) {
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/* Insist on good event counter while assembling */
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@ -1131,7 +1132,7 @@ static void super_90_sync(mddev_t *mddev, mdk_rdev_t *rdev)
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sb->layout = mddev->layout;
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sb->chunk_size = mddev->chunk_sectors << 9;
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if (mddev->bitmap && mddev->bitmap_file == NULL)
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if (mddev->bitmap && mddev->bitmap_info.file == NULL)
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sb->state |= (1<<MD_SB_BITMAP_PRESENT);
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sb->disks[0].state = (1<<MD_DISK_REMOVED);
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@ -1209,7 +1210,7 @@ super_90_rdev_size_change(mdk_rdev_t *rdev, sector_t num_sectors)
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{
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if (num_sectors && num_sectors < rdev->mddev->dev_sectors)
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return 0; /* component must fit device */
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if (rdev->mddev->bitmap_offset)
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if (rdev->mddev->bitmap_info.offset)
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return 0; /* can't move bitmap */
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rdev->sb_start = calc_dev_sboffset(rdev->bdev);
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if (!num_sectors || num_sectors > rdev->sb_start)
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@ -1388,8 +1389,8 @@ static int super_1_validate(mddev_t *mddev, mdk_rdev_t *rdev)
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mddev->raid_disks = le32_to_cpu(sb->raid_disks);
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mddev->dev_sectors = le64_to_cpu(sb->size);
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mddev->events = ev1;
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mddev->bitmap_offset = 0;
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mddev->default_bitmap_offset = 1024 >> 9;
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mddev->bitmap_info.offset = 0;
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mddev->bitmap_info.default_offset = 1024 >> 9;
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mddev->recovery_cp = le64_to_cpu(sb->resync_offset);
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memcpy(mddev->uuid, sb->set_uuid, 16);
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@ -1397,8 +1398,9 @@ static int super_1_validate(mddev_t *mddev, mdk_rdev_t *rdev)
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mddev->max_disks = (4096-256)/2;
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if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_BITMAP_OFFSET) &&
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mddev->bitmap_file == NULL )
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mddev->bitmap_offset = (__s32)le32_to_cpu(sb->bitmap_offset);
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mddev->bitmap_info.file == NULL )
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mddev->bitmap_info.offset =
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(__s32)le32_to_cpu(sb->bitmap_offset);
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if ((le32_to_cpu(sb->feature_map) & MD_FEATURE_RESHAPE_ACTIVE)) {
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mddev->reshape_position = le64_to_cpu(sb->reshape_position);
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@ -1492,8 +1494,8 @@ static void super_1_sync(mddev_t *mddev, mdk_rdev_t *rdev)
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sb->level = cpu_to_le32(mddev->level);
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sb->layout = cpu_to_le32(mddev->layout);
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if (mddev->bitmap && mddev->bitmap_file == NULL) {
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sb->bitmap_offset = cpu_to_le32((__u32)mddev->bitmap_offset);
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if (mddev->bitmap && mddev->bitmap_info.file == NULL) {
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sb->bitmap_offset = cpu_to_le32((__u32)mddev->bitmap_info.offset);
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sb->feature_map = cpu_to_le32(MD_FEATURE_BITMAP_OFFSET);
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}
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@ -1560,7 +1562,7 @@ super_1_rdev_size_change(mdk_rdev_t *rdev, sector_t num_sectors)
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max_sectors -= rdev->data_offset;
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if (!num_sectors || num_sectors > max_sectors)
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num_sectors = max_sectors;
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} else if (rdev->mddev->bitmap_offset) {
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} else if (rdev->mddev->bitmap_info.offset) {
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/* minor version 0 with bitmap we can't move */
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return 0;
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} else {
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@ -4507,12 +4509,12 @@ out:
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printk(KERN_INFO "md: %s stopped.\n", mdname(mddev));
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bitmap_destroy(mddev);
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if (mddev->bitmap_file) {
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restore_bitmap_write_access(mddev->bitmap_file);
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fput(mddev->bitmap_file);
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mddev->bitmap_file = NULL;
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if (mddev->bitmap_info.file) {
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restore_bitmap_write_access(mddev->bitmap_info.file);
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fput(mddev->bitmap_info.file);
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mddev->bitmap_info.file = NULL;
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}
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mddev->bitmap_offset = 0;
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mddev->bitmap_info.offset = 0;
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/* make sure all md_delayed_delete calls have finished */
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flush_scheduled_work();
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@ -4553,6 +4555,8 @@ out:
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mddev->degraded = 0;
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mddev->barriers_work = 0;
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mddev->safemode = 0;
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mddev->bitmap_info.offset = 0;
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mddev->bitmap_info.default_offset = 0;
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kobject_uevent(&disk_to_dev(mddev->gendisk)->kobj, KOBJ_CHANGE);
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if (mddev->hold_active == UNTIL_STOP)
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mddev->hold_active = 0;
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@ -4738,7 +4742,7 @@ static int get_array_info(mddev_t * mddev, void __user * arg)
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info.state = 0;
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if (mddev->in_sync)
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info.state = (1<<MD_SB_CLEAN);
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if (mddev->bitmap && mddev->bitmap_offset)
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if (mddev->bitmap && mddev->bitmap_info.offset)
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info.state = (1<<MD_SB_BITMAP_PRESENT);
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info.active_disks = insync;
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info.working_disks = working;
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@ -5096,23 +5100,23 @@ static int set_bitmap_file(mddev_t *mddev, int fd)
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if (fd >= 0) {
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if (mddev->bitmap)
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return -EEXIST; /* cannot add when bitmap is present */
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mddev->bitmap_file = fget(fd);
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mddev->bitmap_info.file = fget(fd);
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if (mddev->bitmap_file == NULL) {
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if (mddev->bitmap_info.file == NULL) {
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printk(KERN_ERR "%s: error: failed to get bitmap file\n",
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mdname(mddev));
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return -EBADF;
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}
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err = deny_bitmap_write_access(mddev->bitmap_file);
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err = deny_bitmap_write_access(mddev->bitmap_info.file);
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if (err) {
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printk(KERN_ERR "%s: error: bitmap file is already in use\n",
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mdname(mddev));
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fput(mddev->bitmap_file);
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mddev->bitmap_file = NULL;
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fput(mddev->bitmap_info.file);
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mddev->bitmap_info.file = NULL;
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return err;
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}
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mddev->bitmap_offset = 0; /* file overrides offset */
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mddev->bitmap_info.offset = 0; /* file overrides offset */
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} else if (mddev->bitmap == NULL)
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return -ENOENT; /* cannot remove what isn't there */
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err = 0;
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@ -5127,11 +5131,11 @@ static int set_bitmap_file(mddev_t *mddev, int fd)
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mddev->pers->quiesce(mddev, 0);
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}
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if (fd < 0) {
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if (mddev->bitmap_file) {
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restore_bitmap_write_access(mddev->bitmap_file);
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fput(mddev->bitmap_file);
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if (mddev->bitmap_info.file) {
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restore_bitmap_write_access(mddev->bitmap_info.file);
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fput(mddev->bitmap_info.file);
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}
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mddev->bitmap_file = NULL;
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mddev->bitmap_info.file = NULL;
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}
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return err;
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@ -5198,8 +5202,8 @@ static int set_array_info(mddev_t * mddev, mdu_array_info_t *info)
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mddev->flags = 0;
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set_bit(MD_CHANGE_DEVS, &mddev->flags);
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mddev->default_bitmap_offset = MD_SB_BYTES >> 9;
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mddev->bitmap_offset = 0;
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mddev->bitmap_info.default_offset = MD_SB_BYTES >> 9;
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mddev->bitmap_info.offset = 0;
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mddev->reshape_position = MaxSector;
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@ -5299,7 +5303,7 @@ static int update_array_info(mddev_t *mddev, mdu_array_info_t *info)
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int state = 0;
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/* calculate expected state,ignoring low bits */
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if (mddev->bitmap && mddev->bitmap_offset)
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if (mddev->bitmap && mddev->bitmap_info.offset)
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state |= (1 << MD_SB_BITMAP_PRESENT);
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if (mddev->major_version != info->major_version ||
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@ -5358,9 +5362,10 @@ static int update_array_info(mddev_t *mddev, mdu_array_info_t *info)
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/* add the bitmap */
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if (mddev->bitmap)
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return -EEXIST;
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if (mddev->default_bitmap_offset == 0)
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if (mddev->bitmap_info.default_offset == 0)
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return -EINVAL;
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mddev->bitmap_offset = mddev->default_bitmap_offset;
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mddev->bitmap_info.offset =
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mddev->bitmap_info.default_offset;
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mddev->pers->quiesce(mddev, 1);
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rv = bitmap_create(mddev);
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if (rv)
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@ -5375,7 +5380,7 @@ static int update_array_info(mddev_t *mddev, mdu_array_info_t *info)
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mddev->pers->quiesce(mddev, 1);
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bitmap_destroy(mddev);
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mddev->pers->quiesce(mddev, 0);
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mddev->bitmap_offset = 0;
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mddev->bitmap_info.offset = 0;
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}
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}
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md_update_sb(mddev, 1);
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@ -280,16 +280,18 @@ struct mddev_s
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unsigned int max_write_behind; /* 0 = sync */
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struct bitmap *bitmap; /* the bitmap for the device */
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struct file *bitmap_file; /* the bitmap file */
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long bitmap_offset; /* offset from superblock of
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* start of bitmap. May be
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* negative, but not '0'
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*/
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long default_bitmap_offset; /* this is the offset to use when
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* hot-adding a bitmap. It should
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* eventually be settable by sysfs.
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*/
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struct mutex bitmap_mutex;
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struct {
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struct file *file; /* the bitmap file */
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long offset; /* offset from superblock of
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* start of bitmap. May be
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* negative, but not '0'
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*/
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long default_offset; /* this is the offset to use when
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* hot-adding a bitmap. It should
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* eventually be settable by sysfs.
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*/
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struct mutex mutex;
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} bitmap_info;
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struct list_head all_mddevs;
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Block a user