From: "Dr. David Alan Gilbert" <dgilbert@xxxxxxxxxx>
'removemapping' is the complement to 'setupmapping', it unmaps
a range of mapped files from the window visible to the kernel.
A 'removemapping' call consists of 'count' regions to unmap,
each consisting of an offset and length.
Signed-off-by: Vivek Goyal <vgoyal@xxxxxxxxxx>
Signed-off-by: Peng Tao <tao.peng@xxxxxxxxxxxxxxxxx>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@xxxxxxxxxx>
---
include/uapi/linux/fuse.h | 15 ++++++++++++++-
1 file changed, 14 insertions(+), 1 deletion(-)
diff --git a/include/uapi/linux/fuse.h b/include/uapi/linux/fuse.h
index fb79d4d0b3a7..f14eeb5cfc14 100644
--- a/include/uapi/linux/fuse.h
+++ b/include/uapi/linux/fuse.h
@@ -133,7 +133,7 @@
*
* 7.31
* - add FUSE_WRITE_KILL_PRIV flag
- * - add FUSE_SETUPMAPPING
+ * - add FUSE_SETUPMAPPING and FUSE_REMOVEMAPPING
*/
#ifndef _LINUX_FUSE_H
@@ -424,6 +424,7 @@ enum fuse_opcode {
FUSE_LSEEK = 46,
FUSE_COPY_FILE_RANGE = 47,
FUSE_SETUPMAPPING = 48,
+ FUSE_REMOVEMAPPING = 49,
/* CUSE specific operations */
CUSE_INIT = 4096,
@@ -862,4 +863,16 @@ struct fuse_setupmapping_in {
uint64_t moffset;
};
+struct fuse_removemapping_in {
+ /* number of fuse_removemapping_one following */
+ uint32_t count;
+};
+
+struct fuse_removemapping_one {
+ /* Offset into the dax window at start of unmapping */
+ uint64_t moffset;
+ /* Length of unmapping required */
+ uint64_t len;
+};
+
#endif /* _LINUX_FUSE_H */
--
2.21.0
