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| author | David Sterba <dsterba@suse.cz> | 2015-01-23 18:43:31 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-06-07 18:18:54 -0700 |
| commit | 296f8da334a009ea2ec8112c2a1ac318872eff87 (patch) | |
| tree | bf29f52a6a3fb46f2f5ebeaad3e64ab699ff184e /fs | |
| parent | 72de21b004d05eff15ca7315cd2be16b18fb20d2 (diff) | |
| download | lwn-296f8da334a009ea2ec8112c2a1ac318872eff87.tar.gz lwn-296f8da334a009ea2ec8112c2a1ac318872eff87.zip | |
btrfs: add read-only check to sysfs handler of features
commit ee6111386a1b304f8bf589d36810d53e3b27ee20 upstream.
We don't want to trigger the change on a read-only filesystem, similar
to what the label handler does.
Signed-off-by: David Sterba <dsterba@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/btrfs/sysfs.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/fs/btrfs/sysfs.c b/fs/btrfs/sysfs.c index 539e7b5e3f86..6a6bb600b1ff 100644 --- a/fs/btrfs/sysfs.c +++ b/fs/btrfs/sysfs.c @@ -120,6 +120,9 @@ static ssize_t btrfs_feature_attr_store(struct kobject *kobj, if (!fs_info) return -EPERM; + if (fs_info->sb->s_flags & MS_RDONLY) + return -EROFS; + ret = kstrtoul(skip_spaces(buf), 0, &val); if (ret) return ret; |