This patch adds the nilfs_suinfo_update structure, which contains the
information needed to update one segment usage entry. The flags
specify, which fields need to be updated.
Signed-off-by: Andreas Rohner <andreas.rohner@xxxxxxx>
---
include/linux/nilfs2_fs.h | 41 +++++++++++++++++++++++++++++++++++++++++
1 file changed, 41 insertions(+)
diff --git a/include/linux/nilfs2_fs.h b/include/linux/nilfs2_fs.h
index 9875576..7b94449 100644
--- a/include/linux/nilfs2_fs.h
+++ b/include/linux/nilfs2_fs.h
@@ -709,6 +709,47 @@ static inline int nilfs_suinfo_clean(const struct nilfs_suinfo *si)
return !si->sui_flags;
}
+/**
+ * nilfs_suinfo_update - segment usage information update
+ * @sup_segnum: segment number
+ * @sup_flags: flags for which fields are active in sup_sui
+ * @sup_reserved: reserved necessary for alignment
+ * @sup_sui: segment usage information
+ */
+struct nilfs_suinfo_update {
+ __u64 sup_segnum;
+ __u32 sup_flags;
+ __u32 sup_reserved;
+ struct nilfs_suinfo sup_sui;
+};
+
+enum {
+ NILFS_SUINFO_UPDATE_LASTMOD,
+ NILFS_SUINFO_UPDATE_NBLOCKS,
+ NILFS_SUINFO_UPDATE_FLAGS,
+};
+
+#define NILFS_SUINFO_UPDATE_FNS(flag, name) \
+static inline void \
+nilfs_suinfo_update_set_##name(struct nilfs_suinfo_update *sup) \
+{ \
+ sup->sup_flags |= 1UL << NILFS_SUINFO_UPDATE_##flag; \
+} \
+static inline void \
+nilfs_suinfo_update_clear_##name(struct nilfs_suinfo_update *sup) \
+{ \
+ sup->sup_flags &= ~(1UL << NILFS_SUINFO_UPDATE_##flag); \
+} \
+static inline int \
+nilfs_suinfo_update_##name(const struct nilfs_suinfo_update *sup) \
+{ \
+ return !!(sup->sup_flags & (1UL << NILFS_SUINFO_UPDATE_##flag));\
+}
+
+NILFS_SUINFO_UPDATE_FNS(LASTMOD, lastmod)
+NILFS_SUINFO_UPDATE_FNS(NBLOCKS, nblocks)
+NILFS_SUINFO_UPDATE_FNS(FLAGS, flags)
+
/* ioctl */
enum {
NILFS_CHECKPOINT,
--
1.8.5.3
--
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