1 files changed, 30 insertions, 26 deletions

diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index 9744af9d71e9..2ff7cd2db25f 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -68,7 +68,7 @@ enum {
 	Opt_degraded, Opt_subvol, Opt_device, Opt_nodatasum, Opt_nodatacow,
 	Opt_max_extent, Opt_max_inline, Opt_alloc_start, Opt_nobarrier,
 	Opt_ssd, Opt_thread_pool, Opt_noacl,  Opt_compress, Opt_notreelog,
-	Opt_flushoncommit, Opt_err,
+	Opt_ratio, Opt_flushoncommit, Opt_err,
 };
 
 static match_table_t tokens = {
@@ -87,6 +87,7 @@ static match_table_t tokens = {
 	{Opt_noacl, "noacl"},
 	{Opt_notreelog, "notreelog"},
 	{Opt_flushoncommit, "flushoncommit"},
+	{Opt_ratio, "metadata_ratio=%d"},
 	{Opt_err, NULL},
 };
 
@@ -195,7 +196,7 @@ int btrfs_parse_options(struct btrfs_root *root, char *options)
 				info->max_extent = max_t(u64,
 					info->max_extent, root->sectorsize);
 				printk(KERN_INFO "btrfs: max_extent at %llu\n",
-				       info->max_extent);
+				       (unsigned long long)info->max_extent);
 			}
 			break;
 		case Opt_max_inline:
@@ -210,7 +211,7 @@ int btrfs_parse_options(struct btrfs_root *root, char *options)
 						root->sectorsize);
 				}
 				printk(KERN_INFO "btrfs: max_inline at %llu\n",
-					info->max_inline);
+					(unsigned long long)info->max_inline);
 			}
 			break;
 		case Opt_alloc_start:
@@ -220,7 +221,7 @@ int btrfs_parse_options(struct btrfs_root *root, char *options)
 				kfree(num);
 				printk(KERN_INFO
 					"btrfs: allocations start at %llu\n",
-					info->alloc_start);
+					(unsigned long long)info->alloc_start);
 			}
 			break;
 		case Opt_noacl:
@@ -234,6 +235,15 @@ int btrfs_parse_options(struct btrfs_root *root, char *options)
 			printk(KERN_INFO "btrfs: turning on flush-on-commit\n");
 			btrfs_set_opt(info->mount_opt, FLUSHONCOMMIT);
 			break;
+		case Opt_ratio:
+			intarg = 0;
+			match_int(&args[0], &intarg);
+			if (intarg) {
+				info->metadata_ratio = intarg;
+				printk(KERN_INFO "btrfs: metadata ratio %d\n",
+				       info->metadata_ratio);
+			}
+			break;
 		default:
 			break;
 		}
@@ -410,11 +420,14 @@ static int btrfs_show_options(struct seq_file *seq, struct vfsmount *vfs)
 	if (btrfs_test_opt(root, NOBARRIER))
 		seq_puts(seq, ",nobarrier");
 	if (info->max_extent != (u64)-1)
-		seq_printf(seq, ",max_extent=%llu", info->max_extent);
+		seq_printf(seq, ",max_extent=%llu",
+			   (unsigned long long)info->max_extent);
 	if (info->max_inline != 8192 * 1024)
-		seq_printf(seq, ",max_inline=%llu", info->max_inline);
+		seq_printf(seq, ",max_inline=%llu",
+			   (unsigned long long)info->max_inline);
 	if (info->alloc_start != 0)
-		seq_printf(seq, ",alloc_start=%llu", info->alloc_start);
+		seq_printf(seq, ",alloc_start=%llu",
+			   (unsigned long long)info->alloc_start);
 	if (info->thread_pool_size !=  min_t(unsigned long,
 					     num_online_cpus() + 2, 8))
 		seq_printf(seq, ",thread_pool=%d", info->thread_pool_size);
@@ -423,9 +436,9 @@ static int btrfs_show_options(struct seq_file *seq, struct vfsmount *vfs)
 	if (btrfs_test_opt(root, SSD))
 		seq_puts(seq, ",ssd");
 	if (btrfs_test_opt(root, NOTREELOG))
-		seq_puts(seq, ",no-treelog");
+		seq_puts(seq, ",notreelog");
 	if (btrfs_test_opt(root, FLUSHONCOMMIT))
-		seq_puts(seq, ",flush-on-commit");
+		seq_puts(seq, ",flushoncommit");
 	if (!(root->fs_info->sb->s_flags & MS_POSIXACL))
 		seq_puts(seq, ",noacl");
 	return 0;
@@ -489,8 +502,7 @@ static int btrfs_get_sb(struct file_system_type *fs_type, int flags,
 
 	if (s->s_root) {
 		if ((flags ^ s->s_flags) & MS_RDONLY) {
-			up_write(&s->s_umount);
-			deactivate_super(s);
+			deactivate_locked_super(s);
 			error = -EBUSY;
 			goto error_close_devices;
 		}
@@ -504,8 +516,7 @@ static int btrfs_get_sb(struct file_system_type *fs_type, int flags,
 		error = btrfs_fill_super(s, fs_devices, data,
 					 flags & MS_SILENT ? 1 : 0);
 		if (error) {
-			up_write(&s->s_umount);
-			deactivate_super(s);
+			deactivate_locked_super(s);
 			goto error_free_subvol_name;
 		}
 
@@ -522,15 +533,13 @@ static int btrfs_get_sb(struct file_system_type *fs_type, int flags,
 		mutex_unlock(&s->s_root->d_inode->i_mutex);
 
 		if (IS_ERR(root)) {
-			up_write(&s->s_umount);
-			deactivate_super(s);
+			deactivate_locked_super(s);
 			error = PTR_ERR(root);
 			goto error_free_subvol_name;
 		}
 		if (!root->d_inode) {
 			dput(root);
-			up_write(&s->s_umount);
-			deactivate_super(s);
+			deactivate_locked_super(s);
 			error = -ENXIO;
 			goto error_free_subvol_name;
 		}
@@ -635,14 +644,9 @@ static long btrfs_control_ioctl(struct file *file, unsigned int cmd,
 	if (!capable(CAP_SYS_ADMIN))
 		return -EPERM;
 
-	vol = kmalloc(sizeof(*vol), GFP_KERNEL);
-	if (!vol)
-		return -ENOMEM;
-
-	if (copy_from_user(vol, (void __user *)arg, sizeof(*vol))) {
-		ret = -EFAULT;
-		goto out;
-	}
+	vol = memdup_user((void __user *)arg, sizeof(*vol));
+	if (IS_ERR(vol))
+		return PTR_ERR(vol);
 
 	switch (cmd) {
 	case BTRFS_IOC_SCAN_DEV:
@@ -650,7 +654,7 @@ static long btrfs_control_ioctl(struct file *file, unsigned int cmd,
 					    &btrfs_fs_type, &fs_devices);
 		break;
 	}
-out:
+
 	kfree(vol);
 	return ret;
 }