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Diffstat (limited to 'fs/btrfs/volumes.c')
-rw-r--r--fs/btrfs/volumes.c95
1 files changed, 57 insertions, 38 deletions
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index 8a3d2594b807..ecaad40e7ef4 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -2845,31 +2845,48 @@ out:
static int balance_kthread(void *data)
{
- struct btrfs_balance_control *bctl =
- (struct btrfs_balance_control *)data;
- struct btrfs_fs_info *fs_info = bctl->fs_info;
+ struct btrfs_fs_info *fs_info = data;
int ret = 0;
mutex_lock(&fs_info->volume_mutex);
mutex_lock(&fs_info->balance_mutex);
- set_balance_control(bctl);
-
- if (btrfs_test_opt(fs_info->tree_root, SKIP_BALANCE)) {
- printk(KERN_INFO "btrfs: force skipping balance\n");
- } else {
+ if (fs_info->balance_ctl) {
printk(KERN_INFO "btrfs: continuing balance\n");
- ret = btrfs_balance(bctl, NULL);
+ ret = btrfs_balance(fs_info->balance_ctl, NULL);
}
mutex_unlock(&fs_info->balance_mutex);
mutex_unlock(&fs_info->volume_mutex);
+
return ret;
}
-int btrfs_recover_balance(struct btrfs_root *tree_root)
+int btrfs_resume_balance_async(struct btrfs_fs_info *fs_info)
{
struct task_struct *tsk;
+
+ spin_lock(&fs_info->balance_lock);
+ if (!fs_info->balance_ctl) {
+ spin_unlock(&fs_info->balance_lock);
+ return 0;
+ }
+ spin_unlock(&fs_info->balance_lock);
+
+ if (btrfs_test_opt(fs_info->tree_root, SKIP_BALANCE)) {
+ printk(KERN_INFO "btrfs: force skipping balance\n");
+ return 0;
+ }
+
+ tsk = kthread_run(balance_kthread, fs_info, "btrfs-balance");
+ if (IS_ERR(tsk))
+ return PTR_ERR(tsk);
+
+ return 0;
+}
+
+int btrfs_recover_balance(struct btrfs_fs_info *fs_info)
+{
struct btrfs_balance_control *bctl;
struct btrfs_balance_item *item;
struct btrfs_disk_balance_args disk_bargs;
@@ -2882,29 +2899,30 @@ int btrfs_recover_balance(struct btrfs_root *tree_root)
if (!path)
return -ENOMEM;
- bctl = kzalloc(sizeof(*bctl), GFP_NOFS);
- if (!bctl) {
- ret = -ENOMEM;
- goto out;
- }
-
key.objectid = BTRFS_BALANCE_OBJECTID;
key.type = BTRFS_BALANCE_ITEM_KEY;
key.offset = 0;
- ret = btrfs_search_slot(NULL, tree_root, &key, path, 0, 0);
+ ret = btrfs_search_slot(NULL, fs_info->tree_root, &key, path, 0, 0);
if (ret < 0)
- goto out_bctl;
+ goto out;
if (ret > 0) { /* ret = -ENOENT; */
ret = 0;
- goto out_bctl;
+ goto out;
+ }
+
+ bctl = kzalloc(sizeof(*bctl), GFP_NOFS);
+ if (!bctl) {
+ ret = -ENOMEM;
+ goto out;
}
leaf = path->nodes[0];
item = btrfs_item_ptr(leaf, path->slots[0], struct btrfs_balance_item);
- bctl->fs_info = tree_root->fs_info;
- bctl->flags = btrfs_balance_flags(leaf, item) | BTRFS_BALANCE_RESUME;
+ bctl->fs_info = fs_info;
+ bctl->flags = btrfs_balance_flags(leaf, item);
+ bctl->flags |= BTRFS_BALANCE_RESUME;
btrfs_balance_data(leaf, item, &disk_bargs);
btrfs_disk_balance_args_to_cpu(&bctl->data, &disk_bargs);
@@ -2913,14 +2931,13 @@ int btrfs_recover_balance(struct btrfs_root *tree_root)
btrfs_balance_sys(leaf, item, &disk_bargs);
btrfs_disk_balance_args_to_cpu(&bctl->sys, &disk_bargs);
- tsk = kthread_run(balance_kthread, bctl, "btrfs-balance");
- if (IS_ERR(tsk))
- ret = PTR_ERR(tsk);
- else
- goto out;
+ mutex_lock(&fs_info->volume_mutex);
+ mutex_lock(&fs_info->balance_mutex);
-out_bctl:
- kfree(bctl);
+ set_balance_control(bctl);
+
+ mutex_unlock(&fs_info->balance_mutex);
+ mutex_unlock(&fs_info->volume_mutex);
out:
btrfs_free_path(path);
return ret;
@@ -4061,16 +4078,18 @@ static void btrfs_end_bio(struct bio *bio, int err)
BUG_ON(stripe_index >= bbio->num_stripes);
dev = bbio->stripes[stripe_index].dev;
- if (bio->bi_rw & WRITE)
- btrfs_dev_stat_inc(dev,
- BTRFS_DEV_STAT_WRITE_ERRS);
- else
- btrfs_dev_stat_inc(dev,
- BTRFS_DEV_STAT_READ_ERRS);
- if ((bio->bi_rw & WRITE_FLUSH) == WRITE_FLUSH)
- btrfs_dev_stat_inc(dev,
- BTRFS_DEV_STAT_FLUSH_ERRS);
- btrfs_dev_stat_print_on_error(dev);
+ if (dev->bdev) {
+ if (bio->bi_rw & WRITE)
+ btrfs_dev_stat_inc(dev,
+ BTRFS_DEV_STAT_WRITE_ERRS);
+ else
+ btrfs_dev_stat_inc(dev,
+ BTRFS_DEV_STAT_READ_ERRS);
+ if ((bio->bi_rw & WRITE_FLUSH) == WRITE_FLUSH)
+ btrfs_dev_stat_inc(dev,
+ BTRFS_DEV_STAT_FLUSH_ERRS);
+ btrfs_dev_stat_print_on_error(dev);
+ }
}
}