X-Git-Url: https://git.whamcloud.com/?p=fs%2Flustre-release.git;a=blobdiff_plain;f=lustre%2Finclude%2Fuapi%2Flinux%2Flustre%2Flustre_fiemap.h;h=8204cd96885f96ede3e017927c31f74cf28537d7;hp=beea76d98fa3209688fe8e4f7118fd3dd4534aa5;hb=1d3c585194a907addbe8be7a884cc28d51db4b48;hpb=7a7309fa849577ddd5a4f6bb5bfb69e84a7fec89

diff --git a/lustre/include/uapi/linux/lustre/lustre_fiemap.h b/lustre/include/uapi/linux/lustre/lustre_fiemap.h
index beea76d..8204cd9 100644
--- a/lustre/include/uapi/linux/lustre/lustre_fiemap.h
+++ b/lustre/include/uapi/linux/lustre/lustre_fiemap.h
@@ -27,9 +27,6 @@
  */
 /*
  * This file is part of Lustre, http://www.lustre.org/
- * Lustre is a trademark of Sun Microsystems, Inc.
- *
- * lustre/include/lustre/ll_fiemap.h
  *
  * FIEMAP data structures and flags. This header file will be used until
  * fiemap.h is available in the upstream kernel.
@@ -41,22 +38,46 @@
 #ifndef _LUSTRE_FIEMAP_H
 #define _LUSTRE_FIEMAP_H
 
-#ifndef __KERNEL__
 #include <stddef.h>
 #include <linux/fiemap.h>
-#endif
 #include <linux/types.h>
 
-/* XXX: We use fiemap_extent::fe_reserved[0] */
+/**
+ * XXX: We use fiemap_extent::fe_reserved[0], notice the high 16bits of it
+ * is used to locate the stripe number starting from the very beginning to
+ * resume the fiemap call.
+ */
 #define fe_device	fe_reserved[0]
 
-static inline __kernel_size_t fiemap_count_to_size(size_t extent_count)
+static inline int get_fe_device(struct fiemap_extent *fe)
+{
+	return fe->fe_device & 0xffff;
+}
+static inline void set_fe_device(struct fiemap_extent *fe, int devno)
+{
+	fe->fe_device = (fe->fe_device & 0xffff0000) | (devno & 0xffff);
+}
+static inline int get_fe_stripenr(struct fiemap_extent *fe)
+{
+	return fe->fe_device >> 16;
+}
+static inline void set_fe_stripenr(struct fiemap_extent *fe, int nr)
+{
+	fe->fe_device = (fe->fe_device & 0xffff) | (nr << 16);
+}
+static inline void set_fe_device_stripenr(struct fiemap_extent *fe, int devno,
+					  int nr)
+{
+	fe->fe_device = (nr << 16) | (devno & 0xffff);
+}
+
+static inline __kernel_size_t fiemap_count_to_size(__kernel_size_t extent_count)
 {
 	return sizeof(struct fiemap) + extent_count *
 				       sizeof(struct fiemap_extent);
 }
 
-static inline unsigned fiemap_size_to_count(size_t array_size)
+static inline unsigned int fiemap_size_to_count(__kernel_size_t array_size)
 {
 	return (array_size - sizeof(struct fiemap)) /
 	       sizeof(struct fiemap_extent);
@@ -68,8 +89,6 @@ static inline unsigned fiemap_size_to_count(size_t array_size)
 #undef FIEMAP_FLAGS_COMPAT
 #endif
 
-/* Lustre specific flags - use a high bit, don't conflict with upstream flag */
-#define FIEMAP_EXTENT_NO_DIRECT 0x40000000 /* Data mapping undefined */
 #define FIEMAP_EXTENT_NET       0x80000000 /* Data stored remotely.
 					    * Sets NO_DIRECT flag */