diff options
| author | Chris Mason <clm@fb.com> | 2016-05-17 14:24:44 -0700 |
|---|---|---|
| committer | Chris Mason <clm@fb.com> | 2016-05-17 14:24:44 -0700 |
| commit | a88336d13c66fc171f336c6332fcb67339894e08 (patch) | |
| tree | 595935ba3afc91dce9be83ca65932f3cf1379436 /fs/btrfs/sysfs.c | |
| parent | 02da2d72174c61988eb4456b53f405e3ebdebce4 (diff) | |
| parent | 680834ca0ad4e9827048d4bda1e38db69c3dd1e4 (diff) | |
Merge branch 'for-chris-4.7' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux into for-linus-4.7
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; |