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authorChris Mason <chris.mason@oracle.com>2007-12-14 15:30:32 -0500
committerChris Mason <chris.mason@oracle.com>2008-09-25 11:03:58 -0400
commitb6cda9bcb4df7544c67fc3548a53bc1607d59f46 (patch)
tree2bae71b1c9eca52bf1e37ca1b3bdd4525e0a43fd /fs/btrfs/super.c
parente9906a98497c26a3c1a7532b51b81cc1fbdf9e1d (diff)
Btrfs: Add mount -o nodatasum to turn of file data checksumming
Signed-off-by: Chris Mason <chris.mason@oracle.com>
Diffstat (limited to 'fs/btrfs/super.c')
-rw-r--r--fs/btrfs/super.c17
1 files changed, 15 insertions, 2 deletions
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index ffa02872c4d..ad4f280ec77 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -61,11 +61,12 @@ static void btrfs_put_super (struct super_block * sb)
}
enum {
- Opt_subvol, Opt_err,
+ Opt_subvol, Opt_nodatasum, Opt_err,
};
static match_table_t tokens = {
{Opt_subvol, "subvol=%s"},
+ {Opt_nodatasum, "nodatasum"},
{Opt_err, NULL}
};
@@ -74,7 +75,12 @@ static int parse_options (char * options,
char **subvol_name)
{
char * p;
+ struct btrfs_fs_info *info = NULL;
substring_t args[MAX_OPT_ARGS];
+
+ if (root)
+ info = root->fs_info;
+
if (!options)
return 1;
@@ -86,7 +92,12 @@ static int parse_options (char * options,
token = match_token(p, tokens, args);
switch (token) {
case Opt_subvol:
- *subvol_name = match_strdup(&args[0]);
+ if (subvol_name)
+ *subvol_name = match_strdup(&args[0]);
+ break;
+ case Opt_nodatasum:
+ if (root)
+ btrfs_set_opt(info->mount_opt, NODATASUM);
break;
default:
return 0;
@@ -143,6 +154,8 @@ static int btrfs_fill_super(struct super_block * sb, void * data, int silent)
goto fail_close;
}
+ parse_options((char *)data, tree_root, NULL);
+
/* this does the super kobj at the same time */
err = btrfs_sysfs_add_super(tree_root->fs_info);
if (err)