diff options
Diffstat (limited to 'drivers/md/md-bitmap.c')
| -rw-r--r-- | drivers/md/md-bitmap.c | 131 |
1 files changed, 119 insertions, 12 deletions
diff --git a/drivers/md/md-bitmap.c b/drivers/md/md-bitmap.c index 83378c033c72..028b9ca8ce52 100644 --- a/drivers/md/md-bitmap.c +++ b/drivers/md/md-bitmap.c @@ -216,6 +216,7 @@ struct bitmap { }; static struct workqueue_struct *md_bitmap_wq; +static struct attribute_group md_bitmap_internal_group; static int __bitmap_resize(struct bitmap *bitmap, sector_t blocks, int chunksize, bool init); @@ -2580,6 +2581,30 @@ static int bitmap_resize(struct mddev *mddev, sector_t blocks, int chunksize) return __bitmap_resize(bitmap, blocks, chunksize, false); } +static bool bitmap_none_enabled(void *data, bool flush) +{ + return false; +} + +static int bitmap_none_create(struct mddev *mddev) +{ + return 0; +} + +static int bitmap_none_load(struct mddev *mddev) +{ + return 0; +} + +static void bitmap_none_destroy(struct mddev *mddev) +{ +} + +static int bitmap_none_get_stats(void *data, struct md_bitmap_stats *stats) +{ + return -ENOENT; +} + static ssize_t location_show(struct mddev *mddev, char *page) { @@ -2618,7 +2643,11 @@ location_store(struct mddev *mddev, const char *buf, size_t len) goto out; } - bitmap_destroy(mddev); + sysfs_unmerge_group(&mddev->kobj, &md_bitmap_internal_group); + md_bitmap_destroy_nosysfs(mddev); + mddev->bitmap_id = ID_BITMAP_NONE; + if (!mddev_set_bitmap_ops_nosysfs(mddev)) + goto none_err; mddev->bitmap_info.offset = 0; if (mddev->bitmap_info.file) { struct file *f = mddev->bitmap_info.file; @@ -2654,16 +2683,25 @@ location_store(struct mddev *mddev, const char *buf, size_t len) } mddev->bitmap_info.offset = offset; - rv = bitmap_create(mddev); + md_bitmap_destroy_nosysfs(mddev); + mddev->bitmap_id = ID_BITMAP; + if (!mddev_set_bitmap_ops_nosysfs(mddev)) + goto bitmap_err; + + rv = md_bitmap_create_nosysfs(mddev); if (rv) - goto out; + goto create_err; - rv = bitmap_load(mddev); + rv = mddev->bitmap_ops->load(mddev); if (rv) { mddev->bitmap_info.offset = 0; - bitmap_destroy(mddev); - goto out; + goto load_err; } + + rv = sysfs_merge_group(&mddev->kobj, + &md_bitmap_internal_group); + if (rv) + goto merge_err; } } if (!mddev->external) { @@ -2679,6 +2717,22 @@ out: if (rv) return rv; return len; + +merge_err: + mddev->bitmap_info.offset = 0; +load_err: + md_bitmap_destroy_nosysfs(mddev); +create_err: + mddev->bitmap_info.offset = 0; + mddev->bitmap_id = ID_BITMAP_NONE; + if (!mddev_set_bitmap_ops_nosysfs(mddev)) + rv = -ENOENT; + goto out; +bitmap_err: + rv = -ENOENT; +none_err: + mddev->bitmap_info.offset = 0; + goto out; } static struct md_sysfs_entry bitmap_location = @@ -2955,8 +3009,12 @@ static struct md_sysfs_entry max_backlog_used = __ATTR(max_backlog_used, S_IRUGO | S_IWUSR, behind_writes_used_show, behind_writes_used_reset); -static struct attribute *md_bitmap_attrs[] = { +static struct attribute *md_bitmap_common_attrs[] = { &bitmap_location.attr, + NULL +}; + +static struct attribute *md_bitmap_internal_attrs[] = { &bitmap_space.attr, &bitmap_timeout.attr, &bitmap_backlog.attr, @@ -2967,9 +3025,41 @@ static struct attribute *md_bitmap_attrs[] = { NULL }; -static struct attribute_group md_bitmap_group = { +static struct attribute_group md_bitmap_common_group = { .name = "bitmap", - .attrs = md_bitmap_attrs, + .attrs = md_bitmap_common_attrs, +}; + +static struct attribute_group md_bitmap_internal_group = { + .name = "bitmap", + .attrs = md_bitmap_internal_attrs, +}; + +static const struct attribute_group *bitmap_groups[] = { + &md_bitmap_common_group, + &md_bitmap_internal_group, + NULL, +}; + +static const struct attribute_group *bitmap_none_groups[] = { + &md_bitmap_common_group, + NULL, +}; + +static struct bitmap_operations bitmap_none_ops = { + .head = { + .type = MD_BITMAP, + .id = ID_BITMAP_NONE, + .name = "none", + }, + + .enabled = bitmap_none_enabled, + .create = bitmap_none_create, + .load = bitmap_none_load, + .destroy = bitmap_none_destroy, + .get_stats = bitmap_none_get_stats, + + .groups = bitmap_none_groups, }; static struct bitmap_operations bitmap_ops = { @@ -3013,21 +3103,38 @@ static struct bitmap_operations bitmap_ops = { .set_pages = bitmap_set_pages, .free = md_bitmap_free, - .group = &md_bitmap_group, + .groups = bitmap_groups, }; int md_bitmap_init(void) { + int err; + md_bitmap_wq = alloc_workqueue("md_bitmap", WQ_MEM_RECLAIM | WQ_UNBOUND, 0); if (!md_bitmap_wq) return -ENOMEM; - return register_md_submodule(&bitmap_ops.head); + err = register_md_submodule(&bitmap_none_ops.head); + if (err) + goto err_wq; + + err = register_md_submodule(&bitmap_ops.head); + if (err) + goto err_none; + + return 0; + +err_none: + unregister_md_submodule(&bitmap_none_ops.head); +err_wq: + destroy_workqueue(md_bitmap_wq); + return err; } void md_bitmap_exit(void) { - destroy_workqueue(md_bitmap_wq); unregister_md_submodule(&bitmap_ops.head); + unregister_md_submodule(&bitmap_none_ops.head); + destroy_workqueue(md_bitmap_wq); } |