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| author | Chris Mason | 2007-12-14 21:30:32 +0100 |
|---|---|---|
| committer | Chris Mason | 2008-09-25 17:03:58 +0200 |
| commit | b6cda9bcb4df7544c67fc3548a53bc1607d59f46 (patch) | |
| tree | 2bae71b1c9eca52bf1e37ca1b3bdd4525e0a43fd /fs/btrfs/super.c | |
| parent | Fixes for loopback files in btrfs (diff) | |
| download | kernel-qcow2-linux-b6cda9bcb4df7544c67fc3548a53bc1607d59f46.tar.gz kernel-qcow2-linux-b6cda9bcb4df7544c67fc3548a53bc1607d59f46.tar.xz kernel-qcow2-linux-b6cda9bcb4df7544c67fc3548a53bc1607d59f46.zip | |
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.c | 17 |
1 files changed, 15 insertions, 2 deletions
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c index ffa02872c4d6..ad4f280ec777 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) |