diff options
| -rw-r--r-- | fs/btrfs/sysfs.c | 24 |
1 files changed, 22 insertions, 2 deletions
diff --git a/fs/btrfs/sysfs.c b/fs/btrfs/sysfs.c index 78b4af72997b..2880407d0dd3 100644 --- a/fs/btrfs/sysfs.c +++ b/fs/btrfs/sysfs.c @@ -1307,15 +1307,34 @@ BTRFS_ATTR(, temp_fsid, btrfs_temp_fsid_show); static const char * const btrfs_read_policy_name[] = { "pid" }; -static int btrfs_read_policy_to_enum(const char *str) +static int btrfs_read_policy_to_enum(const char *str, s64 *value_ret) { char param[32] = { 0 }; + char __maybe_unused *value_str; if (!str || strlen(str) == 0) return 0; strncpy(param, str, sizeof(param) - 1); +#ifdef CONFIG_BTRFS_EXPERIMENTAL + /* Separate value from input in policy:value format. */ + value_str = strchr(param, ':'); + if (value_str) { + int ret; + + *value_str = 0; + value_str++; + if (!value_ret) + return -EINVAL; + ret = kstrtos64(value_str, 10, value_ret); + if (ret) + return -EINVAL; + if (*value_ret < 0) + return -ERANGE; + } +#endif + return sysfs_match_string(btrfs_read_policy_name, param); } @@ -1351,8 +1370,9 @@ static ssize_t btrfs_read_policy_store(struct kobject *kobj, { struct btrfs_fs_devices *fs_devices = to_fs_devs(kobj); int index; + s64 value = -1; - index = btrfs_read_policy_to_enum(buf); + index = btrfs_read_policy_to_enum(buf, &value); if (index < 0) return -EINVAL; |