Add extent flag to indicate that the data are compressed. The users
set the fe_phys_length member, and PHYS_LENGTH and ENCODED flags.
Signed-off-by: David Sterba <dsterba@xxxxxxx>
---
fs/ioctl.c | 6 +++++-
include/uapi/linux/fiemap.h | 4 ++++
2 files changed, 9 insertions(+), 1 deletion(-)
diff --git a/fs/ioctl.c b/fs/ioctl.c
index 127551c70b0a..902b1d5a6316 100644
--- a/fs/ioctl.c
+++ b/fs/ioctl.c
@@ -81,7 +81,8 @@ static int ioctl_fibmap(struct file *filp, int __user *p)
* extent that will fit in user array.
*/
#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)
int fiemap_fill_next_extent(struct fiemap_extent_info *fieinfo, u64 logical,
u64 phys, u64 len, u64 phys_len, u32 flags)
@@ -112,6 +113,9 @@ int fiemap_fill_next_extent(struct fiemap_extent_info *fieinfo, u64 logical,
extent.fe_flags = flags;
extent.fe_phys_length = phys_len;
+ WARN_ON_ONCE((flags & FIEMAP_EXTENT_DATA_COMPRESSED)
+ && !(flags & FIEMAP_EXTENT_ENCODED));
+
dest += fieinfo->fi_extents_mapped;
if (copy_to_user(dest, &extent, sizeof(extent)))
return -EFAULT;
diff --git a/include/uapi/linux/fiemap.h b/include/uapi/linux/fiemap.h
index ed52d3f7821d..64fb1b3a7e1f 100644
--- a/include/uapi/linux/fiemap.h
+++ b/include/uapi/linux/fiemap.h
@@ -54,6 +54,10 @@ struct fiemap {
* while fs is unmounted */
#define FIEMAP_EXTENT_PHYS_LENGTH 0x00000010 /* Physical length of extent
* not the same as logical */
+#define FIEMAP_EXTENT_DATA_COMPRESSED 0x00000040 /* Data is compressed by fs.
+ * Sets EXTENT_ENCODED and
+ * the compressed size is
+ * stored in fe_phys_length */
#define FIEMAP_EXTENT_DATA_ENCRYPTED 0x00000080 /* Data is encrypted by fs.
* Sets EXTENT_ENCODED */
#define FIEMAP_EXTENT_NOT_ALIGNED 0x00000100 /* Extent offsets may not be
--
1.8.4.5
--
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