Provide the basic information about filesystem through the ioctl: * b-tree node size (same as leaf size) * sector size * expected alignment of CLONE_RANGE and EXTENT_SAME ioctl arguments Backward compatibility: if the values are 0, kernel does not provide this information, the applications should ignore them.
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| @@ -181,7 +181,11 @@ struct btrfs_ioctl_fs_info_args { · 180 unmodified lines | |||
| 181 | __u64 max_id; /* out */ | 181 | __u64 max_id; /* out */ |
| 182 | __u64 num_devices; /* out */ | 182 | __u64 num_devices; /* out */ |
| 183 | __u8 fsid[BTRFS_FSID_SIZE]; /* out */ | 183 | __u8 fsid[BTRFS_FSID_SIZE]; /* out */ |
| 184 | __u64 reserved[124]; /* pad to 1k */ | 184 | __u32 nodesize; /* out */ |
| 185 | __u32 sectorsize; /* out */ | ||
| 186 | __u32 clone_alignment; /* out */ | ||
| 187 | __u32 reserved32; | ||
| 188 | __u64 reserved[122]; /* pad to 1k */ | ||
| 185 | }; | 189 | }; |
| 186 | 190 | ||
| 187 | struct btrfs_ioctl_feature_flags { | 191 | struct btrfs_ioctl_feature_flags { |