[JFFS2] Introduce jffs2_link_node_ref() function to reduce code duplication

The same sequence of code was repeated in many places, to add a new
struct jffs2_raw_node_ref to an eraseblock and adjust the space accounting
accordingly. Move it out-of-line.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>

fs/jffs2/erase.c

@@ -373,12 +373,8 @@ static void jffs2_mark_erased_block(struct jffs2_sb_info *c, struct jffs2_eraseb
 				goto filebad;
 		}
 
-		jeb->first_node = jeb->last_node = NULL;
+		/* Everything else got zeroed before the erase */
 		jeb->free_size = c->sector_size;
-		jeb->used_size = 0;
-		jeb->dirty_size = 0;
-		jeb->wasted_size = 0;
-
 	} else {
 
 		struct kvec vecs[1];
@@ -412,17 +408,13 @@ static void jffs2_mark_erased_block(struct jffs2_sb_info *c, struct jffs2_eraseb
 			goto filebad;
 		}
 
+		/* Everything else got zeroed before the erase */
+		jeb->free_size = c->sector_size;
+
 		marker_ref->next_in_ino = NULL;
-		marker_ref->next_phys = NULL;
 		marker_ref->flash_offset = jeb->offset | REF_NORMAL;
-		marker_ref->__totlen = c->cleanmarker_size;
 
-		jeb->first_node = jeb->last_node = marker_ref;
+		jffs2_link_node_ref(c, jeb, marker_ref, c->cleanmarker_size);
-
-		jeb->free_size = c->sector_size - c->cleanmarker_size;
-		jeb->used_size = c->cleanmarker_size;
-		jeb->dirty_size = 0;
-		jeb->wasted_size = 0;
 	}
 
 	spin_lock(&c->erase_completion_lock);

fs/jffs2/nodelist.c

@@ -1046,3 +1046,37 @@ void jffs2_kill_fragtree(struct rb_root *root, struct jffs2_sb_info *c)
 		cond_resched();
 	}
 }
+
+void jffs2_link_node_ref(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb,
+			 struct jffs2_raw_node_ref *ref, uint32_t len)
+{
+	if (!jeb->first_node)
+		jeb->first_node = ref;
+	if (jeb->last_node)
+		jeb->last_node->next_phys = ref;
+	jeb->last_node = ref;
+
+	switch(ref_flags(ref)) {
+	case REF_UNCHECKED:
+		c->unchecked_size += len;
+		jeb->unchecked_size += len;
+		break;
+
+	case REF_NORMAL:
+	case REF_PRISTINE:
+		c->used_size += len;
+		jeb->used_size += len;
+		break;
+
+	case REF_OBSOLETE:
+		c->dirty_size += len;
+		jeb->used_size += len;
+		break;
+	}
+	c->free_size -= len;
+	jeb->free_size -= len;
+
+	/* Set __totlen field... for now */
+	ref->__totlen = len;
+	ref->next_phys = NULL;
+}

fs/jffs2/nodelist.h

@@ -348,6 +348,8 @@ void jffs2_obsolete_node_frag(struct jffs2_sb_info *c, struct jffs2_node_frag *t
 int jffs2_add_full_dnode_to_inode(struct jffs2_sb_info *c, struct jffs2_inode_info *f, struct jffs2_full_dnode *fn);
 void jffs2_truncate_fragtree (struct jffs2_sb_info *c, struct rb_root *list, uint32_t size);
 int jffs2_add_older_frag_to_fragtree(struct jffs2_sb_info *c, struct jffs2_inode_info *f, struct jffs2_tmp_dnode_info *tn);
+void jffs2_link_node_ref(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb,
+			 struct jffs2_raw_node_ref *ref, uint32_t len);
 
 /* nodemgmt.c */
 int jffs2_thread_should_wake(struct jffs2_sb_info *c);

fs/jffs2/nodemgmt.c

@@ -403,21 +403,7 @@ int jffs2_add_physical_node_ref(struct jffs2_sb_info *c, struct jffs2_raw_node_r
 #endif
 	spin_lock(&c->erase_completion_lock);
 
-	if (!jeb->first_node)
+	jffs2_link_node_ref(c, jeb, new, len);
-		jeb->first_node = new;
-	if (jeb->last_node)
-		jeb->last_node->next_phys = new;
-	jeb->last_node = new;
-
-	jeb->free_size -= len;
-	c->free_size -= len;
-	if (ref_obsolete(new)) {
-		jeb->dirty_size += len;
-		c->dirty_size += len;
-	} else {
-		jeb->used_size += len;
-		c->used_size += len;
-	}
 
 	if (!jeb->free_size && !jeb->dirty_size && !ISDIRTY(jeb->wasted_size)) {
 		/* If it lives on the dirty_list, jffs2_reserve_space will put it there */

fs/jffs2/scan.c

@@ -351,17 +351,11 @@ static int jffs2_scan_xattr_node(struct jffs2_sb_info *c, struct jffs2_erasebloc
 	xd->data_crc = je32_to_cpu(rx->data_crc);
 	xd->node = raw;
 
-	raw->__totlen = totlen;
 	raw->flash_offset = ofs | REF_PRISTINE;
-	raw->next_phys = NULL;
 	raw->next_in_ino = (void *)xd;
-	if (!jeb->first_node)
-		jeb->first_node = raw;
-	if (jeb->last_node)
-		jeb->last_node->next_phys = raw;
-	jeb->last_node = raw;
 
-	USED_SPACE(PAD(je32_to_cpu(rx->totlen)));
+	jffs2_link_node_ref(c, jeb, raw, totlen);
+
 	if (jffs2_sum_active())
 		jffs2_sum_add_xattr_mem(s, rx, ofs - jeb->offset);
 	dbg_xattr("scaning xdatum at %#08x (xid=%u, version=%u)\n",
@@ -418,17 +412,11 @@ static int jffs2_scan_xref_node(struct jffs2_sb_info *c, struct jffs2_eraseblock
 	ref->next = c->xref_temp;
 	c->xref_temp = ref;
 
-	raw->__totlen = PAD(je32_to_cpu(rr->totlen));
 	raw->flash_offset = ofs | REF_PRISTINE;
-	raw->next_phys = NULL;
 	raw->next_in_ino = (void *)ref;
-	if (!jeb->first_node)
-		jeb->first_node = raw;
-	if (jeb->last_node)
-		jeb->last_node->next_phys = raw;
-	jeb->last_node = raw;
 
-	USED_SPACE(PAD(je32_to_cpu(rr->totlen)));	
+	jffs2_link_node_ref(c, jeb, raw, PAD(je32_to_cpu(rr->totlen)));
+
 	if (jffs2_sum_active())
 		jffs2_sum_add_xref_mem(s, rr, ofs - jeb->offset);
 	dbg_xattr("scan xref at %#08x (xid=%u, ino=%u)\n",
@@ -827,12 +815,10 @@ scan_more:
 					return -ENOMEM;
 				}
 				marker_ref->next_in_ino = NULL;
-				marker_ref->next_phys = NULL;
 				marker_ref->flash_offset = ofs | REF_NORMAL;
-				marker_ref->__totlen = c->cleanmarker_size;
-				jeb->first_node = jeb->last_node = marker_ref;
 
-				USED_SPACE(PAD(c->cleanmarker_size));
+				jffs2_link_node_ref(c, jeb, marker_ref, c->cleanmarker_size);
+
 				ofs += PAD(c->cleanmarker_size);
 			}
 			break;
@@ -971,16 +957,11 @@ static int jffs2_scan_inode_node(struct jffs2_sb_info *c, struct jffs2_erasebloc
 	/* Wheee. It worked */
 
 	raw->flash_offset = ofs | REF_UNCHECKED;
-	raw->__totlen = PAD(je32_to_cpu(ri->totlen));
-	raw->next_phys = NULL;
-	raw->next_in_ino = ic->nodes;
 
+	raw->next_in_ino = ic->nodes;
 	ic->nodes = raw;
-	if (!jeb->first_node)
+	
-		jeb->first_node = raw;
+	jffs2_link_node_ref(c, jeb, raw, PAD(je32_to_cpu(ri->totlen)));
-	if (jeb->last_node)
-		jeb->last_node->next_phys = raw;
-	jeb->last_node = raw;
 
 	D1(printk(KERN_DEBUG "Node is ino #%u, version %d. Range 0x%x-0x%x\n",
 		  je32_to_cpu(ri->ino), je32_to_cpu(ri->version),
@@ -989,8 +970,6 @@ static int jffs2_scan_inode_node(struct jffs2_sb_info *c, struct jffs2_erasebloc
 
 	pseudo_random += je32_to_cpu(ri->version);
 
-	UNCHECKED_SPACE(PAD(je32_to_cpu(ri->totlen)));
-
 	if (jffs2_sum_active()) {
 		jffs2_sum_add_inode_mem(s, ri, ofs - jeb->offset);
 	}
@@ -1053,16 +1032,11 @@ static int jffs2_scan_dirent_node(struct jffs2_sb_info *c, struct jffs2_eraseblo
 		return -ENOMEM;
 	}
 
-	raw->__totlen = PAD(je32_to_cpu(rd->totlen));
 	raw->flash_offset = ofs | REF_PRISTINE;
-	raw->next_phys = NULL;
 	raw->next_in_ino = ic->nodes;
 	ic->nodes = raw;
-	if (!jeb->first_node)
+
-		jeb->first_node = raw;
+	jffs2_link_node_ref(c, jeb, raw, PAD(je32_to_cpu(rd->totlen)));
-	if (jeb->last_node)
-		jeb->last_node->next_phys = raw;
-	jeb->last_node = raw;
 
 	fd->raw = raw;
 	fd->next = NULL;
@@ -1070,7 +1044,6 @@ static int jffs2_scan_dirent_node(struct jffs2_sb_info *c, struct jffs2_eraseblo
 	fd->ino = je32_to_cpu(rd->ino);
 	fd->nhash = full_name_hash(fd->name, rd->nsize);
 	fd->type = rd->type;
-	USED_SPACE(PAD(je32_to_cpu(rd->totlen)));
 	jffs2_add_fd_to_list(c, fd, &ic->scan_dents);
 
 	if (jffs2_sum_active()) {

fs/jffs2/summary.c

@@ -410,19 +410,13 @@ static int jffs2_sum_process_sum_data(struct jffs2_sb_info *c, struct jffs2_eras
 				}
 
 				raw->flash_offset = (jeb->offset + je32_to_cpu(spi->offset)) | REF_UNCHECKED;
-				raw->__totlen = PAD(je32_to_cpu(spi->totlen));
+
-				raw->next_phys = NULL;
 				raw->next_in_ino = ic->nodes;
-
 				ic->nodes = raw;
-				if (!jeb->first_node)
-					jeb->first_node = raw;
-				if (jeb->last_node)
-					jeb->last_node->next_phys = raw;
-				jeb->last_node = raw;
-				*pseudo_random += je32_to_cpu(spi->version);
 
-				UNCHECKED_SPACE(PAD(je32_to_cpu(spi->totlen)));
+				jffs2_link_node_ref(c, jeb, raw, PAD(je32_to_cpu(spi->totlen)));
+
+				*pseudo_random += je32_to_cpu(spi->version);
 
 				sp += JFFS2_SUMMARY_INODE_SIZE;
 
@@ -457,16 +451,11 @@ static int jffs2_sum_process_sum_data(struct jffs2_sb_info *c, struct jffs2_eras
 					return -ENOMEM;
 				}
 
-				raw->__totlen = PAD(je32_to_cpu(spd->totlen));
 				raw->flash_offset = (jeb->offset + je32_to_cpu(spd->offset)) | REF_PRISTINE;
-				raw->next_phys = NULL;
 				raw->next_in_ino = ic->nodes;
 				ic->nodes = raw;
-				if (!jeb->first_node)
+
-					jeb->first_node = raw;
+				jffs2_link_node_ref(c, jeb, raw, PAD(je32_to_cpu(spd->totlen)));
-				if (jeb->last_node)
-					jeb->last_node->next_phys = raw;
-				jeb->last_node = raw;
 
 				fd->raw = raw;
 				fd->next = NULL;
@@ -474,7 +463,7 @@ static int jffs2_sum_process_sum_data(struct jffs2_sb_info *c, struct jffs2_eras
 				fd->ino = je32_to_cpu(spd->ino);
 				fd->nhash = full_name_hash(fd->name, spd->nsize);
 				fd->type = spd->type;
-				USED_SPACE(PAD(je32_to_cpu(spd->totlen)));
+
 				jffs2_add_fd_to_list(c, fd, &ic->scan_dents);
 
 				*pseudo_random += je32_to_cpu(spd->version);
@@ -516,17 +505,11 @@ static int jffs2_sum_process_sum_data(struct jffs2_sb_info *c, struct jffs2_eras
 				xd->node = raw;
 
 				raw->flash_offset = ofs | REF_UNCHECKED;
-				raw->__totlen = PAD(je32_to_cpu(spx->totlen));
-				raw->next_phys = NULL;
 				raw->next_in_ino = (void *)xd;
-				if (!jeb->first_node)
+
-					jeb->first_node = raw;
+				jffs2_link_node_ref(c, jeb, raw, PAD(je32_to_cpu(spx->totlen)));
-				if (jeb->last_node)
-					jeb->last_node->next_phys = raw;
-				jeb->last_node = raw;
 
 				*pseudo_random += je32_to_cpu(spx->xid);
-				UNCHECKED_SPACE(je32_to_cpu(spx->totlen));
 				sp += JFFS2_SUMMARY_XATTR_SIZE;
 
 				break;
@@ -559,17 +542,11 @@ static int jffs2_sum_process_sum_data(struct jffs2_sb_info *c, struct jffs2_eras
 				ref->next = c->xref_temp;
 				c->xref_temp = ref;
 
-				raw->__totlen = PAD(sizeof(struct jffs2_raw_xref));
 				raw->flash_offset = ofs | REF_UNCHECKED;
-				raw->next_phys = NULL;
 				raw->next_in_ino = (void *)ref;
-				if (!jeb->first_node)
-					jeb->first_node = raw;
-				if (jeb->last_node)
-					jeb->last_node->next_phys = raw;
-				jeb->last_node = raw;
 
-				UNCHECKED_SPACE(PAD(sizeof(struct jffs2_raw_xref)));
+				jffs2_link_node_ref(c, jeb, raw, PAD(sizeof(struct jffs2_raw_xref)));
+
 				*pseudo_random += ofs;
 				sp += JFFS2_SUMMARY_XREF_SIZE;
 
@@ -653,13 +630,10 @@ int jffs2_sum_scan_sumnode(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb
 				return -ENOMEM;
 			}
 
-			marker_ref->next_in_ino = NULL;
-			marker_ref->next_phys = NULL;
 			marker_ref->flash_offset = jeb->offset | REF_NORMAL;
-			marker_ref->__totlen = je32_to_cpu(summary->cln_mkr);
+			marker_ref->next_in_ino = NULL;
-			jeb->first_node = jeb->last_node = marker_ref;
 
-			USED_SPACE( PAD(je32_to_cpu(summary->cln_mkr)) );
+			jffs2_link_node_ref(c, jeb, marker_ref, je32_to_cpu(summary->cln_mkr));
 		}
 	}
 
@@ -682,15 +656,8 @@ int jffs2_sum_scan_sumnode(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb
 	cache_ref->next_in_ino = NULL;
 	cache_ref->next_phys = NULL;
 	cache_ref->flash_offset = ofs | REF_NORMAL;
-	cache_ref->__totlen = sumsize;
 
-	if (!jeb->first_node)
+	jffs2_link_node_ref(c, jeb, cache_ref, sumsize);
-		jeb->first_node = cache_ref;
-	if (jeb->last_node)
-		jeb->last_node->next_phys = cache_ref;
-	jeb->last_node = cache_ref;
-
-	USED_SPACE(sumsize);
 
 	jeb->wasted_size += jeb->free_size;
 	c->wasted_size += jeb->free_size;
@@ -888,17 +855,9 @@ int jffs2_sum_write_sumnode(struct jffs2_sb_info *c)
 	}
 
 	summary_ref->next_in_ino = NULL;
-	summary_ref->next_phys = NULL;
 	summary_ref->flash_offset = (jeb->offset + c->sector_size - jeb->free_size) | REF_NORMAL;
-	summary_ref->__totlen = infosize;
 
-	if (!jeb->first_node)
+	jffs2_link_node_ref(c, jeb, summary_ref, infosize);
-		jeb->first_node = summary_ref;
-	if (jeb->last_node)
-		jeb->last_node->next_phys = summary_ref;
-	jeb->last_node = summary_ref;
-
-	USED_SPACE(infosize);
 
 	return 0;
 }