summaryrefslogtreecommitdiff
path: root/fs/btrfs/ioctl.c
diff options
context:
space:
mode:
Diffstat (limited to 'fs/btrfs/ioctl.c')
-rw-r--r--fs/btrfs/ioctl.c69
1 files changed, 46 insertions, 23 deletions
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index a8577a7f26ab..cdbb054102b9 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -239,7 +239,13 @@ static noinline int create_subvol(struct btrfs_root *root,
u64 index = 0;
unsigned long nr = 1;
- ret = btrfs_check_metadata_free_space(root);
+ /*
+ * 1 - inode item
+ * 2 - refs
+ * 1 - root item
+ * 2 - dir items
+ */
+ ret = btrfs_reserve_metadata_space(root, 6);
if (ret)
return ret;
@@ -340,6 +346,9 @@ fail:
err = btrfs_commit_transaction(trans, root);
if (err && !ret)
ret = err;
+
+ btrfs_unreserve_metadata_space(root, 6);
+ btrfs_btree_balance_dirty(root, nr);
return ret;
}
@@ -355,19 +364,27 @@ static int create_snapshot(struct btrfs_root *root, struct dentry *dentry,
if (!root->ref_cows)
return -EINVAL;
- ret = btrfs_check_metadata_free_space(root);
+ /*
+ * 1 - inode item
+ * 2 - refs
+ * 1 - root item
+ * 2 - dir items
+ */
+ ret = btrfs_reserve_metadata_space(root, 6);
if (ret)
goto fail_unlock;
pending_snapshot = kzalloc(sizeof(*pending_snapshot), GFP_NOFS);
if (!pending_snapshot) {
ret = -ENOMEM;
+ btrfs_unreserve_metadata_space(root, 6);
goto fail_unlock;
}
pending_snapshot->name = kmalloc(namelen + 1, GFP_NOFS);
if (!pending_snapshot->name) {
ret = -ENOMEM;
kfree(pending_snapshot);
+ btrfs_unreserve_metadata_space(root, 6);
goto fail_unlock;
}
memcpy(pending_snapshot->name, name, namelen);
@@ -813,6 +830,7 @@ out_up_write:
out_unlock:
mutex_unlock(&inode->i_mutex);
if (!err) {
+ shrink_dcache_sb(root->fs_info->sb);
btrfs_invalidate_inodes(dest);
d_delete(dentry);
}
@@ -1105,8 +1123,10 @@ static noinline long btrfs_ioctl_clone(struct file *file, unsigned long srcfd,
datao += off - key.offset;
datal -= off - key.offset;
}
- if (key.offset + datao + datal > off + len)
- datal = off + len - key.offset - datao;
+
+ if (key.offset + datal > off + len)
+ datal = off + len - key.offset;
+
/* disko == 0 means it's a hole */
if (!disko)
datao = 0;
@@ -1215,15 +1235,15 @@ static long btrfs_ioctl_trans_start(struct file *file)
struct inode *inode = fdentry(file)->d_inode;
struct btrfs_root *root = BTRFS_I(inode)->root;
struct btrfs_trans_handle *trans;
- int ret = 0;
+ int ret;
+ ret = -EPERM;
if (!capable(CAP_SYS_ADMIN))
- return -EPERM;
+ goto out;
- if (file->private_data) {
- ret = -EINPROGRESS;
+ ret = -EINPROGRESS;
+ if (file->private_data)
goto out;
- }
ret = mnt_want_write(file->f_path.mnt);
if (ret)
@@ -1233,12 +1253,19 @@ static long btrfs_ioctl_trans_start(struct file *file)
root->fs_info->open_ioctl_trans++;
mutex_unlock(&root->fs_info->trans_mutex);
+ ret = -ENOMEM;
trans = btrfs_start_ioctl_transaction(root, 0);
- if (trans)
- file->private_data = trans;
- else
- ret = -ENOMEM;
- /*printk(KERN_INFO "btrfs_ioctl_trans_start on %p\n", file);*/
+ if (!trans)
+ goto out_drop;
+
+ file->private_data = trans;
+ return 0;
+
+out_drop:
+ mutex_lock(&root->fs_info->trans_mutex);
+ root->fs_info->open_ioctl_trans--;
+ mutex_unlock(&root->fs_info->trans_mutex);
+ mnt_drop_write(file->f_path.mnt);
out:
return ret;
}
@@ -1254,24 +1281,20 @@ long btrfs_ioctl_trans_end(struct file *file)
struct inode *inode = fdentry(file)->d_inode;
struct btrfs_root *root = BTRFS_I(inode)->root;
struct btrfs_trans_handle *trans;
- int ret = 0;
trans = file->private_data;
- if (!trans) {
- ret = -EINVAL;
- goto out;
- }
- btrfs_end_transaction(trans, root);
+ if (!trans)
+ return -EINVAL;
file->private_data = NULL;
+ btrfs_end_transaction(trans, root);
+
mutex_lock(&root->fs_info->trans_mutex);
root->fs_info->open_ioctl_trans--;
mutex_unlock(&root->fs_info->trans_mutex);
mnt_drop_write(file->f_path.mnt);
-
-out:
- return ret;
+ return 0;
}
long btrfs_ioctl(struct file *file, unsigned int