LU-4931 ladvise: Add dontneed advice support for ladvise

[fs/lustre-release.git] / lustre / osd-ldiskfs / osd_io.c

diff --git a/lustre/osd-ldiskfs/osd_io.c b/lustre/osd-ldiskfs/osd_io.c
index 91034d2..9bfe5aa 100644 (file)
--- a/lustre/osd-ldiskfs/osd_io.c
+++ b/lustre/osd-ldiskfs/osd_io.c
@@ -1933,10 +1933,18 @@ static int osd_fiemap_get(const struct lu_env *env, struct dt_object *dt,
 static int osd_ladvise(const struct lu_env *env, struct dt_object *dt,
                       __u64 start, __u64 end, enum lu_ladvise_type advice)
 {
-       int     rc;
+       int              rc = 0;
+       struct inode    *inode = osd_dt_obj(dt)->oo_inode;
        ENTRY;
 
        switch (advice) {
+       case LU_LADVISE_DONTNEED:
+               if (end == 0)
+                       break;
+               invalidate_mapping_pages(inode->i_mapping,
+                                        start >> PAGE_CACHE_SHIFT,
+                                        (end - 1) >> PAGE_CACHE_SHIFT);
+               break;
        default:
                rc = -ENOTSUPP;
                break;