This goes closely with the new physical length field in struct
fiemap_extent, as when physical length is not equal to logical length
the reason is frequently compression.
Signed-off-by: Sweet Tea Dorminy <sweettea-kernel@xxxxxxxxxx>
---
Documentation/filesystems/fiemap.rst | 4 ++++
fs/ioctl.c | 3 ++-
include/uapi/linux/fiemap.h | 2 ++
3 files changed, 8 insertions(+), 1 deletion(-)
diff --git a/Documentation/filesystems/fiemap.rst b/Documentation/filesystems/fiemap.rst
index c060bb83f5d8..16bd7faba5e0 100644
--- a/Documentation/filesystems/fiemap.rst
+++ b/Documentation/filesystems/fiemap.rst
@@ -162,6 +162,10 @@ FIEMAP_EXTENT_DATA_ENCRYPTED
This will also set FIEMAP_EXTENT_ENCODED
The data in this extent has been encrypted by the file system.
+FIEMAP_EXTENT_DATA_COMPRESSED
+ This will also set FIEMAP_EXTENT_ENCODED
+ The data in this extent is compressed by the file system.
+
FIEMAP_EXTENT_NOT_ALIGNED
Extent offsets and length are not guaranteed to be block aligned.
diff --git a/fs/ioctl.c b/fs/ioctl.c
index 1ecd46608ded..5d5a8fedc953 100644
--- a/fs/ioctl.c
+++ b/fs/ioctl.c
@@ -126,7 +126,8 @@ int fiemap_fill_next_extent(struct fiemap_extent_info *fieinfo, u64 logical,
return 1;
#define SET_UNKNOWN_FLAGS (FIEMAP_EXTENT_DELALLOC)
-#define SET_NO_UNMOUNTED_IO_FLAGS (FIEMAP_EXTENT_DATA_ENCRYPTED)
+#define SET_NO_UNMOUNTED_IO_FLAGS (FIEMAP_EXTENT_DATA_ENCRYPTED|\
+ FIEMAP_EXTENT_DATA_COMPRESSED)
#define SET_NOT_ALIGNED_FLAGS (FIEMAP_EXTENT_DATA_TAIL|FIEMAP_EXTENT_DATA_INLINE)
if (flags & SET_UNKNOWN_FLAGS)
diff --git a/include/uapi/linux/fiemap.h b/include/uapi/linux/fiemap.h
index 3079159b8e94..ea97e33ddbb3 100644
--- a/include/uapi/linux/fiemap.h
+++ b/include/uapi/linux/fiemap.h
@@ -67,6 +67,8 @@ struct fiemap {
* Sets EXTENT_UNKNOWN. */
#define FIEMAP_EXTENT_ENCODED 0x00000008 /* Data can not be read
* while fs is unmounted */
+#define FIEMAP_EXTENT_DATA_COMPRESSED 0x00000040 /* Data is compressed by fs.
+ * Sets EXTENT_ENCODED. */
#define FIEMAP_EXTENT_DATA_ENCRYPTED 0x00000080 /* Data is encrypted by fs.
* Sets EXTENT_NO_BYPASS. */
#define FIEMAP_EXTENT_NOT_ALIGNED 0x00000100 /* Extent offsets may not be
--
2.43.0
