[PATCH 05/16] tmem: cleanup: rm unneeded parameters from get path

[Bob Liu <lliubbo@gmail.com>]

tmem only takes a page as unit, so parameters tmem_offset, pfn_offset and len
are meanless, this patch remove them from do_tmem_get() related path.

Signed-off-by: Bob Liu <bob.liu@oracle.com>
---
 xen/common/tmem.c          |   19 ++++++++-----------
 xen/common/tmem_xen.c      |   18 ++++--------------
 xen/include/xen/tmem_xen.h |    3 +--
 3 files changed, 13 insertions(+), 27 deletions(-)

diff --git a/xen/common/tmem.c b/xen/common/tmem.c
index e2e69bf..de3559d 100644
--- a/xen/common/tmem.c
+++ b/xen/common/tmem.c
@@ -330,8 +330,7 @@ static int pcd_copy_to_client(xen_pfn_t cmfn, struct tmem_page_descriptor *pgp)
     else if ( tmem_tze_enabled() && pcd->size < PAGE_SIZE )
         ret = tmem_copy_tze_to_client(cmfn, pcd->tze, pcd->size);
     else
-        ret = tmem_copy_to_client(cmfn, pcd->pfp, 0, 0, PAGE_SIZE,
-                                 tmem_cli_buf_null);
+        ret = tmem_copy_to_client(cmfn, pcd->pfp, tmem_cli_buf_null);
     tmem_read_unlock(&pcd_tree_rwlocks[firstbyte]);
     return ret;
 }
@@ -1647,8 +1646,7 @@ free:
 }
 
 static int do_tmem_get(struct tmem_pool *pool, struct oid *oidp, uint32_t index,
-              xen_pfn_t cmfn, pagesize_t tmem_offset,
-              pagesize_t pfn_offset, pagesize_t len, tmem_cli_va_param_t clibuf)
+              xen_pfn_t cmfn, tmem_cli_va_param_t clibuf)
 {
     struct tmem_object_root *obj;
     struct tmem_page_descriptor *pgp;
@@ -1680,12 +1678,10 @@ static int do_tmem_get(struct tmem_pool *pool, struct oid *oidp, uint32_t index,
         rc = pcd_copy_to_client(cmfn, pgp);
     else if ( pgp->size != 0 )
     {
-        rc = tmem_decompress_to_client(cmfn, pgp->cdata,
-                                      pgp->size, clibuf);
+        rc = tmem_decompress_to_client(cmfn, pgp->cdata, pgp->size, clibuf);
     }
     else
-        rc = tmem_copy_to_client(cmfn, pgp->pfp, tmem_offset,
-                                pfn_offset, len, clibuf);
+        rc = tmem_copy_to_client(cmfn, pgp->pfp, clibuf);
     if ( rc <= 0 )
         goto bad_copy;
 
@@ -2377,7 +2373,7 @@ static int tmemc_save_get_next_page(int cli_id, uint32_t pool_id,
     h.index = pgp->index;
     tmem_copy_to_client_buf(buf, &h, 1);
     tmem_client_buf_add(buf, sizeof(h));
-    ret = do_tmem_get(pool, &oid, pgp->index, 0, 0, 0, pagesize, buf);
+    ret = do_tmem_get(pool, &oid, pgp->index, 0, buf);
 
 out:
     tmem_spin_unlock(&pers_lists_spinlock);
@@ -2647,13 +2643,14 @@ EXPORT long do_tmem_op(tmem_cli_op_t uops)
         break;
     case TMEM_PUT_PAGE:
         tmem_ensure_avail_pages();
-        rc = do_tmem_put(pool, oidp, op.u.gen.index, op.u.gen.cmfn, tmem_cli_buf_null);
+        rc = do_tmem_put(pool, oidp, op.u.gen.index, op.u.gen.cmfn,
+                        tmem_cli_buf_null);
         if (rc == 1) succ_put = 1;
         else non_succ_put = 1;
         break;
     case TMEM_GET_PAGE:
         rc = do_tmem_get(pool, oidp, op.u.gen.index, op.u.gen.cmfn,
-                         0, 0, PAGE_SIZE, tmem_cli_buf_null);
+                        tmem_cli_buf_null);
         if (rc == 1) succ_get = 1;
         else non_succ_get = 1;
         break;
diff --git a/xen/common/tmem_xen.c b/xen/common/tmem_xen.c
index 165c7cf..efc2259 100644
--- a/xen/common/tmem_xen.c
+++ b/xen/common/tmem_xen.c
@@ -164,7 +164,6 @@ EXPORT int tmem_compress_from_client(xen_pfn_t cmfn,
 }
 
 EXPORT int tmem_copy_to_client(xen_pfn_t cmfn, struct page_info *pfp,
-    pagesize_t tmem_offset, pagesize_t pfn_offset, pagesize_t len,
     tmem_cli_va_param_t clibuf)
 {
     unsigned long tmem_mfn, cli_mfn = 0;
@@ -172,8 +171,6 @@ EXPORT int tmem_copy_to_client(xen_pfn_t cmfn, struct page_info *pfp,
     struct page_info *cli_pfp = NULL;
     int rc = 1;
 
-    if ( tmem_offset > PAGE_SIZE || pfn_offset > PAGE_SIZE || len > PAGE_SIZE )
-        return -EINVAL;
     ASSERT(pfp != NULL);
     if ( guest_handle_is_null(clibuf) )
     {
@@ -183,21 +180,14 @@ EXPORT int tmem_copy_to_client(xen_pfn_t cmfn, struct page_info *pfp,
     }
     tmem_mfn = page_to_mfn(pfp);
     tmem_va = map_domain_page(tmem_mfn);
-    if ( len == PAGE_SIZE && !tmem_offset && !pfn_offset && cli_va )
-        memcpy(cli_va, tmem_va, PAGE_SIZE);
-    else if ( (tmem_offset+len <= PAGE_SIZE) && (pfn_offset+len <= PAGE_SIZE) )
+    if ( cli_va )
     {
-        if ( cli_va )
-            memcpy(cli_va + pfn_offset, tmem_va + tmem_offset, len);
-        else if ( copy_to_guest_offset(clibuf, pfn_offset,
-                                       tmem_va + tmem_offset, len) )
-            rc = -EFAULT;
+        memcpy(cli_va, tmem_va, PAGE_SIZE);
+        cli_put_page(cli_va, cli_pfp, cli_mfn, 1);
     }
-    else if ( len )
+    else
         rc = -EINVAL;
     unmap_domain_page(tmem_va);
-    if ( cli_va )
-        cli_put_page(cli_va, cli_pfp, cli_mfn, 1);
     smp_mb();
     return rc;
 }
diff --git a/xen/include/xen/tmem_xen.h b/xen/include/xen/tmem_xen.h
index 25ce268..ae6acf3 100644
--- a/xen/include/xen/tmem_xen.h
+++ b/xen/include/xen/tmem_xen.h
@@ -387,8 +387,7 @@ int tmem_compress_from_client(xen_pfn_t, void **, size_t *,
 
 int tmem_copy_from_client(struct page_info *, xen_pfn_t, tmem_cli_va_param_t);
 
-int tmem_copy_to_client(xen_pfn_t, struct page_info *, pagesize_t tmem_offset,
-    pagesize_t pfn_offset, pagesize_t len, tmem_cli_va_param_t);
+int tmem_copy_to_client(xen_pfn_t, struct page_info *, tmem_cli_va_param_t);
 
 extern int tmem_copy_tze_to_client(xen_pfn_t cmfn, void *tmem_va, pagesize_t len);
 extern void *tmem_persistent_pool_page_get(unsigned long size);
-- 
1.7.10.4