nilfs2: remove nilfs_direct_operations from direct mapping

will remove indirect function calls using nilfs_direct_operations
table.

Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>

2 files changed, 10 insertions, 52 deletions

diff --git a/fs/nilfs2/direct.c b/fs/nilfs2/direct.c
index 2a546c8f784e..33467adf094b 100644
--- a/fs/nilfs2/direct.c
+++ b/fs/nilfs2/direct.c
@@ -90,8 +90,8 @@ static int nilfs_direct_prepare_insert(struct nilfs_direct *direct,
 {
         int ret;
 
-        if (direct->d_ops->dop_find_target != NULL)
-                req->bpr_ptr = direct->d_ops->dop_find_target(direct, key);
+        if (NILFS_BMAP_USE_VBN(&direct->d_bmap))
+                req->bpr_ptr = nilfs_direct_find_target_v(direct, key);
         ret = nilfs_bmap_prepare_alloc_ptr(&direct->d_bmap, req);
         if (ret < 0)
                 return ret;
@@ -116,8 +116,8 @@ static void nilfs_direct_commit_insert(struct nilfs_direct *direct,
         if (!nilfs_bmap_dirty(&direct->d_bmap))
                 nilfs_bmap_set_dirty(&direct->d_bmap);
 
-        if (direct->d_ops->dop_set_target != NULL)
-                direct->d_ops->dop_set_target(direct, key, req->bpr_ptr);
+        if (NILFS_BMAP_USE_VBN(&direct->d_bmap))
+                nilfs_direct_set_target_v(direct, key, req->bpr_ptr);
 }
 
 static int nilfs_direct_insert(struct nilfs_bmap *bmap, __u64 key, __u64 ptr)
@@ -297,12 +297,10 @@ static int nilfs_direct_propagate_v(struct nilfs_direct *direct,
 static int nilfs_direct_propagate(const struct nilfs_bmap *bmap,
                                   struct buffer_head *bh)
 {
-        struct nilfs_direct *direct;
+        struct nilfs_direct *direct = (struct nilfs_direct *)bmap;
 
-        direct = (struct nilfs_direct *)bmap;
-        return (direct->d_ops->dop_propagate != NULL) ?
-                direct->d_ops->dop_propagate(direct, bh) :
-                0;
+        return NILFS_BMAP_USE_VBN(bmap) ?
+                nilfs_direct_propagate_v(direct, bh) : 0;
 }
 
 static int nilfs_direct_assign_v(struct nilfs_direct *direct,
@@ -362,8 +360,9 @@ static int nilfs_direct_assign(struct nilfs_bmap *bmap,
                 return -EINVAL;
         }
 
-        return direct->d_ops->dop_assign(direct, key, ptr, bh,
-                                         blocknr, binfo);
+        return NILFS_BMAP_USE_VBN(bmap) ?
+                nilfs_direct_assign_v(direct, key, ptr, bh, blocknr, binfo) :
+                nilfs_direct_assign_p(direct, key, ptr, bh, blocknr, binfo);
 }
 
 static const struct nilfs_bmap_operations nilfs_direct_ops = {
@@ -386,33 +385,8 @@ static const struct nilfs_bmap_operations nilfs_direct_ops = {
 };
 
 
-static const struct nilfs_direct_operations nilfs_direct_ops_v = {
-        .dop_find_target        =       nilfs_direct_find_target_v,
-        .dop_set_target         =       nilfs_direct_set_target_v,
-        .dop_propagate          =       nilfs_direct_propagate_v,
-        .dop_assign             =       nilfs_direct_assign_v,
-};
-
-static const struct nilfs_direct_operations nilfs_direct_ops_p = {
-        .dop_find_target        =       NULL,
-        .dop_set_target         =       NULL,
-        .dop_propagate          =       NULL,
-        .dop_assign             =       nilfs_direct_assign_p,
-};
-
 int nilfs_direct_init(struct nilfs_bmap *bmap)
 {
-        struct nilfs_direct *direct = (struct nilfs_direct *)bmap;
-
         bmap->b_ops = &nilfs_direct_ops;
-        switch (bmap->b_inode->i_ino) {
-        case NILFS_DAT_INO:
-                direct->d_ops = &nilfs_direct_ops_p;
-                break;
-        default:
-                direct->d_ops = &nilfs_direct_ops_v;
-                break;
-        }
-
         return 0;
 }
diff --git a/fs/nilfs2/direct.h b/fs/nilfs2/direct.h
index d645f13b9aea..a5ffd66e25d0 100644
--- a/fs/nilfs2/direct.h
+++ b/fs/nilfs2/direct.h
@@ -31,18 +31,6 @@
 struct nilfs_direct;
 
 /**
- * struct nilfs_direct_operations - direct mapping operation table
- */
-struct nilfs_direct_operations {
-        __u64 (*dop_find_target)(const struct nilfs_direct *, __u64);
-        void (*dop_set_target)(struct nilfs_direct *, __u64, __u64);
-        int (*dop_propagate)(struct nilfs_direct *, struct buffer_head *);
-        int (*dop_assign)(struct nilfs_direct *, __u64, __u64,
-                          struct buffer_head **, sector_t,
-                          union nilfs_binfo *);
-};
-
-/**
  * struct nilfs_direct_node - direct node
  * @dn_flags: flags
  * @dn_pad: padding
@@ -55,13 +43,9 @@ struct nilfs_direct_node {
 /**
  * struct nilfs_direct - direct mapping
  * @d_bmap: bmap structure
- * @d_ops: direct mapping operation table
  */
 struct nilfs_direct {
         struct nilfs_bmap d_bmap;
-
-        /* direct-mapping-specific members */
-        const struct nilfs_direct_operations *d_ops;
 };