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| author | David Sterba <dsterba@suse.com> | 2016-05-16 15:46:23 +0200 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2016-05-16 15:46:23 +0200 |
| commit | 73d32ce21e1701eaafcea3cbc2a8f27ab1967abe (patch) | |
| tree | 136c03e4be575e4466ef9df119b8debdf768a56a /fs/btrfs/sysfs.c | |
| parent | 02da2d72174c61988eb4456b53f405e3ebdebce4 (diff) | |
| parent | 4673272f43ae790ab9ec04e38a7542f82bb8f020 (diff) | |
| download | linux-73d32ce21e1701eaafcea3cbc2a8f27ab1967abe.tar.gz linux-73d32ce21e1701eaafcea3cbc2a8f27ab1967abe.tar.xz | |
Merge branch 'misc-4.7' into for-chris-4.7-20160516
Diffstat (limited to 'fs/btrfs/sysfs.c')
| -rw-r--r-- | fs/btrfs/sysfs.c | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/fs/btrfs/sysfs.c b/fs/btrfs/sysfs.c index 539e7b5e3f86..4879656bda3c 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; @@ -364,7 +367,13 @@ static ssize_t btrfs_label_show(struct kobject *kobj, { struct btrfs_fs_info *fs_info = to_fs_info(kobj); char *label = fs_info->super_copy->label; - return snprintf(buf, PAGE_SIZE, label[0] ? "%s\n" : "%s", label); + ssize_t ret; + + spin_lock(&fs_info->super_lock); + ret = snprintf(buf, PAGE_SIZE, label[0] ? "%s\n" : "%s", label); + spin_unlock(&fs_info->super_lock); + + return ret; } static ssize_t btrfs_label_store(struct kobject *kobj, @@ -374,6 +383,9 @@ static ssize_t btrfs_label_store(struct kobject *kobj, struct btrfs_fs_info *fs_info = to_fs_info(kobj); size_t p_len; + if (!fs_info) + return -EPERM; + if (fs_info->sb->s_flags & MS_RDONLY) return -EROFS; |