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Btrfs: Integrate metadata reservation with start_transaction

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Besides simplify the code, this change makes sure all metadata
reservation for normal metadata operations are released after
committing transaction.

Changes since V1:

Add code that check if unlink and rmdir will free space.

Add ENOSPC handling for clone ioctl.

Signed-off-by: Yan Zheng <zheng.yan@oracle.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
This commit is contained in:
Yan, Zheng
2010-05-16 10:48:46 -04:00
committed by Chris Mason
parent f0486c68e4
commit a22285a6a3
15 changed files with 685 additions and 535 deletions
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17
fs/btrfs/volumes.c
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@@ -1097,7 +1097,7 @@ static int btrfs_rm_dev_item(struct btrfs_root *root,
if (!path)
return -ENOMEM;
trans = btrfs_start_transaction(root, 1);
trans = btrfs_start_transaction(root, 0);
key.objectid = BTRFS_DEV_ITEMS_OBJECTID;
key.type = BTRFS_DEV_ITEM_KEY;
key.offset = device->devid;
@@ -1486,7 +1486,7 @@ int btrfs_init_new_device(struct btrfs_root *root, char *device_path)
goto error;
}
trans = btrfs_start_transaction(root, 1);
trans = btrfs_start_transaction(root, 0);
lock_chunks(root);
device->barriers = 1;
@@ -1751,9 +1751,10 @@ static int btrfs_relocate_chunk(struct btrfs_root *root,
/* step one, relocate all the extents inside this chunk */
ret = btrfs_relocate_block_group(extent_root, chunk_offset);
BUG_ON(ret);
if (ret)
return ret;
trans = btrfs_start_transaction(root, 1);
trans = btrfs_start_transaction(root, 0);
BUG_ON(!trans);
lock_chunks(root);
@@ -1925,7 +1926,7 @@ int btrfs_balance(struct btrfs_root *dev_root)
break;
BUG_ON(ret);
trans = btrfs_start_transaction(dev_root, 1);
trans = btrfs_start_transaction(dev_root, 0);
BUG_ON(!trans);
ret = btrfs_grow_device(trans, device, old_size);
@@ -2094,11 +2095,7 @@ again:
}
/* Shrinking succeeded, else we would be at "done". */
trans = btrfs_start_transaction(root, 1);
if (!trans) {
ret = -ENOMEM;
goto done;
}
trans = btrfs_start_transaction(root, 0);
lock_chunks(root);
device->disk_total_bytes = new_size;