X-Git-Url: http://git.rot13.org/?a=blobdiff_plain;f=fs%2Fjffs2%2Fsummary.c;h=be1acc3dad97a7d340b56c82c5db59fd64436ce3;hb=d6e05edc59ecd79e8badf440c0d295a979bdfa3e;hp=95b5bf8f4a99b59cf92c52159de6ef4e363ae981;hpb=fb9fbbcc9389edabb172ac1b6419c01e32046787;p=powerpc.git

diff --git a/fs/jffs2/summary.c b/fs/jffs2/summary.c
index 95b5bf8f4a..be1acc3dad 100644
--- a/fs/jffs2/summary.c
+++ b/fs/jffs2/summary.c
@@ -43,7 +43,7 @@ int jffs2_sum_init(struct jffs2_sb_info *c)
 		return -ENOMEM;
 	}
 
-	dbg_summary("returned succesfully\n");
+	dbg_summary("returned successfully\n");
 
 	return 0;
 }
@@ -369,23 +369,41 @@ no_mem:
 	return -ENOMEM;
 }
 
+static struct jffs2_raw_node_ref *sum_link_node_ref(struct jffs2_sb_info *c,
+						    struct jffs2_eraseblock *jeb,
+						    uint32_t ofs, uint32_t len,
+						    struct jffs2_inode_cache *ic)
+{
+	/* If there was a gap, mark it dirty */
+	if ((ofs & ~3) > c->sector_size - jeb->free_size) {
+		/* Ew. Summary doesn't actually tell us explicitly about dirty space */
+		jffs2_scan_dirty_space(c, jeb, (ofs & ~3) - (c->sector_size - jeb->free_size));
+	}
+
+	return jffs2_link_node_ref(c, jeb, jeb->offset + ofs, len, ic);
+}
 
 /* Process the stored summary information - helper function for jffs2_sum_scan_sumnode() */
 
 static int jffs2_sum_process_sum_data(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb,
 				struct jffs2_raw_summary *summary, uint32_t *pseudo_random)
 {
-	struct jffs2_raw_node_ref *raw;
 	struct jffs2_inode_cache *ic;
 	struct jffs2_full_dirent *fd;
 	void *sp;
 	int i, ino;
+	int err;
 
 	sp = summary->sum;
 
 	for (i=0; i<je32_to_cpu(summary->sum_num); i++) {
 		dbg_summary("processing summary index %d\n", i);
 
+		/* Make sure there's a spare ref for dirty space */
+		err = jffs2_prealloc_raw_node_refs(c, jeb, 2);
+		if (err)
+			return err;
+
 		switch (je16_to_cpu(((struct jffs2_sum_unknown_flash *)sp)->nodetype)) {
 			case JFFS2_NODETYPE_INODE: {
 				struct jffs2_sum_inode_flash *spi;
@@ -393,28 +411,18 @@ static int jffs2_sum_process_sum_data(struct jffs2_sb_info *c, struct jffs2_eras
 
 				ino = je32_to_cpu(spi->inode);
 
-				dbg_summary("Inode at 0x%08x\n",
-							jeb->offset + je32_to_cpu(spi->offset));
-
-				raw = jffs2_alloc_raw_node_ref();
-				if (!raw) {
-					JFFS2_NOTICE("allocation of node reference failed\n");
-					return -ENOMEM;
-				}
+				dbg_summary("Inode at 0x%08x-0x%08x\n",
+					    jeb->offset + je32_to_cpu(spi->offset),
+					    jeb->offset + je32_to_cpu(spi->offset) + je32_to_cpu(spi->totlen));
 
 				ic = jffs2_scan_make_ino_cache(c, ino);
 				if (!ic) {
 					JFFS2_NOTICE("scan_make_ino_cache failed\n");
-					jffs2_free_raw_node_ref(raw);
 					return -ENOMEM;
 				}
 
-				raw->flash_offset = (jeb->offset + je32_to_cpu(spi->offset)) | REF_UNCHECKED;
-
-				raw->next_in_ino = ic->nodes;
-				ic->nodes = raw;
-
-				jffs2_link_node_ref(c, jeb, raw, PAD(je32_to_cpu(spi->totlen)));
+				sum_link_node_ref(c, jeb, je32_to_cpu(spi->offset) | REF_UNCHECKED,
+						  PAD(je32_to_cpu(spi->totlen)), ic);
 
 				*pseudo_random += je32_to_cpu(spi->version);
 
@@ -427,8 +435,10 @@ static int jffs2_sum_process_sum_data(struct jffs2_sb_info *c, struct jffs2_eras
 				struct jffs2_sum_dirent_flash *spd;
 				spd = sp;
 
-				dbg_summary("Dirent at 0x%08x\n",
-							jeb->offset + je32_to_cpu(spd->offset));
+				dbg_summary("Dirent at 0x%08x-0x%08x\n",
+					    jeb->offset + je32_to_cpu(spd->offset),
+					    jeb->offset + je32_to_cpu(spd->offset) + je32_to_cpu(spd->totlen));
+
 
 				fd = jffs2_alloc_full_dirent(spd->nsize+1);
 				if (!fd)
@@ -437,27 +447,15 @@ static int jffs2_sum_process_sum_data(struct jffs2_sb_info *c, struct jffs2_eras
 				memcpy(&fd->name, spd->name, spd->nsize);
 				fd->name[spd->nsize] = 0;
 
-				raw = jffs2_alloc_raw_node_ref();
-				if (!raw) {
-					jffs2_free_full_dirent(fd);
-					JFFS2_NOTICE("allocation of node reference failed\n");
-					return -ENOMEM;
-				}
-
 				ic = jffs2_scan_make_ino_cache(c, je32_to_cpu(spd->pino));
 				if (!ic) {
 					jffs2_free_full_dirent(fd);
-					jffs2_free_raw_node_ref(raw);
 					return -ENOMEM;
 				}
 
-				raw->flash_offset = (jeb->offset + je32_to_cpu(spd->offset)) | REF_PRISTINE;
-				raw->next_in_ino = ic->nodes;
-				ic->nodes = raw;
+				fd->raw = sum_link_node_ref(c, jeb,  je32_to_cpu(spd->offset) | REF_UNCHECKED,
+							    PAD(je32_to_cpu(spd->totlen)), ic);
 
-				jffs2_link_node_ref(c, jeb, raw, PAD(je32_to_cpu(spd->totlen)));
-
-				fd->raw = raw;
 				fd->next = NULL;
 				fd->version = je32_to_cpu(spd->version);
 				fd->ino = je32_to_cpu(spd->ino);
@@ -476,38 +474,30 @@ static int jffs2_sum_process_sum_data(struct jffs2_sb_info *c, struct jffs2_eras
 			case JFFS2_NODETYPE_XATTR: {
 				struct jffs2_xattr_datum *xd;
 				struct jffs2_sum_xattr_flash *spx;
-				uint32_t ofs;
 
 				spx = (struct jffs2_sum_xattr_flash *)sp;
-				ofs = jeb->offset + je32_to_cpu(spx->offset);
-				dbg_summary("xattr at %#08x (xid=%u, version=%u)\n", ofs,
+				dbg_summary("xattr at %#08x-%#08x (xid=%u, version=%u)\n", 
+					    jeb->offset + je32_to_cpu(spx->offset),
+					    jeb->offset + je32_to_cpu(spx->offset) + je32_to_cpu(spx->totlen),
 					    je32_to_cpu(spx->xid), je32_to_cpu(spx->version));
-				raw = jffs2_alloc_raw_node_ref();
-				if (!raw) {
-					JFFS2_NOTICE("allocation of node reference failed\n");
-					kfree(summary);
-					return -ENOMEM;
-				}
+
 				xd = jffs2_setup_xattr_datum(c, je32_to_cpu(spx->xid),
 								je32_to_cpu(spx->version));
 				if (IS_ERR(xd)) {
-					jffs2_free_raw_node_ref(raw);
 					if (PTR_ERR(xd) == -EEXIST) {
 						/* a newer version of xd exists */
-						DIRTY_SPACE(je32_to_cpu(spx->totlen));
+						if ((err = jffs2_scan_dirty_space(c, jeb, je32_to_cpu(spx->totlen))))
+							return err;
 						sp += JFFS2_SUMMARY_XATTR_SIZE;
 						break;
 					}
 					JFFS2_NOTICE("allocation of xattr_datum failed\n");
-					kfree(summary);
 					return PTR_ERR(xd);
 				}
-				xd->node = raw;
 
-				raw->flash_offset = ofs | REF_UNCHECKED;
-				raw->next_in_ino = (void *)xd;
-
-				jffs2_link_node_ref(c, jeb, raw, PAD(je32_to_cpu(spx->totlen)));
+				xd->node = sum_link_node_ref(c, jeb, je32_to_cpu(spx->offset) | REF_UNCHECKED,
+							     PAD(je32_to_cpu(spx->totlen)), NULL);
+				/* FIXME */ xd->node->next_in_ino = (void *)xd;
 
 				*pseudo_random += je32_to_cpu(spx->xid);
 				sp += JFFS2_SUMMARY_XATTR_SIZE;
@@ -517,50 +507,52 @@ static int jffs2_sum_process_sum_data(struct jffs2_sb_info *c, struct jffs2_eras
 			case JFFS2_NODETYPE_XREF: {
 				struct jffs2_xattr_ref *ref;
 				struct jffs2_sum_xref_flash *spr;
-				uint32_t ofs;
 
 				spr = (struct jffs2_sum_xref_flash *)sp;
-				ofs = jeb->offset + je32_to_cpu(spr->offset);
-				dbg_summary("xref at %#08x (xid=%u, ino=%u)\n", ofs,
-					    je32_to_cpu(spr->xid), je32_to_cpu(spr->ino));
-				raw = jffs2_alloc_raw_node_ref();
-				if (!raw) {
-					JFFS2_NOTICE("allocation of node reference failed\n");
-					kfree(summary);
-					return -ENOMEM;
-				}
+				dbg_summary("xref at %#08x-%#08x\n",
+					    jeb->offset + je32_to_cpu(spr->offset),
+					    jeb->offset + je32_to_cpu(spr->offset) + 
+					    (uint32_t)PAD(sizeof(struct jffs2_raw_xref)));
+
 				ref = jffs2_alloc_xattr_ref();
 				if (!ref) {
 					JFFS2_NOTICE("allocation of xattr_datum failed\n");
-					jffs2_free_raw_node_ref(raw);
-					kfree(summary);
 					return -ENOMEM;
 				}
 				ref->ino = 0xfffffffe;
 				ref->xid = 0xfffffffd;
-				ref->node = raw;
 				ref->next = c->xref_temp;
 				c->xref_temp = ref;
 
-				raw->flash_offset = ofs | REF_UNCHECKED;
-				raw->next_in_ino = (void *)ref;
+				ref->node = sum_link_node_ref(c, jeb, je32_to_cpu(spr->offset) | REF_UNCHECKED,
+							      PAD(sizeof(struct jffs2_raw_xref)), NULL);
+				/* FIXME */ ref->node->next_in_ino = (void *)ref;
 
-				jffs2_link_node_ref(c, jeb, raw, PAD(sizeof(struct jffs2_raw_xref)));
-
-				*pseudo_random += ofs;
+				*pseudo_random += ref->node->flash_offset;
 				sp += JFFS2_SUMMARY_XREF_SIZE;
 
 				break;
 			}
 #endif
 			default : {
-printk("nodetype = %#04x\n",je16_to_cpu(((struct jffs2_sum_unknown_flash *)sp)->nodetype));
-				JFFS2_WARNING("Unsupported node type found in summary! Exiting...");
-				return -EIO;
+				uint16_t nodetype = je16_to_cpu(((struct jffs2_sum_unknown_flash *)sp)->nodetype);
+				JFFS2_WARNING("Unsupported node type %x found in summary! Exiting...\n", nodetype);
+				if ((nodetype & JFFS2_COMPAT_MASK) == JFFS2_FEATURE_INCOMPAT)
+					return -EIO;
+
+				/* For compatible node types, just fall back to the full scan */
+				c->wasted_size -= jeb->wasted_size;
+				c->free_size += c->sector_size - jeb->free_size;
+				c->used_size -= jeb->used_size;
+				c->dirty_size -= jeb->dirty_size;
+				jeb->wasted_size = jeb->used_size = jeb->dirty_size = 0;
+				jeb->free_size = c->sector_size;
+
+				jffs2_free_jeb_node_refs(c, jeb);
+				return -ENOTRECOVERABLE;
 			}
 		}
 	}
-
 	return 0;
 }
 
@@ -570,14 +562,13 @@ int jffs2_sum_scan_sumnode(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb
 			   uint32_t *pseudo_random)
 {
 	struct jffs2_unknown_node crcnode;
-	struct jffs2_raw_node_ref *cache_ref;
 	int ret, ofs;
 	uint32_t crc;
 
-	ofs = jeb->offset + c->sector_size - sumsize;
+	ofs = c->sector_size - sumsize;
 
 	dbg_summary("summary found for 0x%08x at 0x%08x (0x%x bytes)\n",
-		    jeb->offset, ofs, sumsize);
+		    jeb->offset, jeb->offset + ofs, sumsize);
 
 	/* OK, now check for node validity and CRC */
 	crcnode.magic = cpu_to_je16(JFFS2_MAGIC_BITMASK);
@@ -614,55 +605,49 @@ int jffs2_sum_scan_sumnode(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb
 
 		dbg_summary("Summary : CLEANMARKER node \n");
 
+		ret = jffs2_prealloc_raw_node_refs(c, jeb, 1);
+		if (ret)
+			return ret;
+
 		if (je32_to_cpu(summary->cln_mkr) != c->cleanmarker_size) {
 			dbg_summary("CLEANMARKER node has totlen 0x%x != normal 0x%x\n",
 				je32_to_cpu(summary->cln_mkr), c->cleanmarker_size);
-			DIRTY_SPACE(PAD(je32_to_cpu(summary->cln_mkr)));
+			if ((ret = jffs2_scan_dirty_space(c, jeb, PAD(je32_to_cpu(summary->cln_mkr)))))
+				return ret;
 		} else if (jeb->first_node) {
 			dbg_summary("CLEANMARKER node not first node in block "
 					"(0x%08x)\n", jeb->offset);
-			DIRTY_SPACE(PAD(je32_to_cpu(summary->cln_mkr)));
+			if ((ret = jffs2_scan_dirty_space(c, jeb, PAD(je32_to_cpu(summary->cln_mkr)))))
+				return ret;
 		} else {
-			struct jffs2_raw_node_ref *marker_ref = jffs2_alloc_raw_node_ref();
-
-			if (!marker_ref) {
-				JFFS2_NOTICE("Failed to allocate node ref for clean marker\n");
-				return -ENOMEM;
-			}
-
-			marker_ref->flash_offset = jeb->offset | REF_NORMAL;
-			marker_ref->next_in_ino = NULL;
-
-			jffs2_link_node_ref(c, jeb, marker_ref, je32_to_cpu(summary->cln_mkr));
+			jffs2_link_node_ref(c, jeb, jeb->offset | REF_NORMAL,
+					    je32_to_cpu(summary->cln_mkr), NULL);
 		}
 	}
 
-	if (je32_to_cpu(summary->padded)) {
-		DIRTY_SPACE(je32_to_cpu(summary->padded));
-	}
-
 	ret = jffs2_sum_process_sum_data(c, jeb, summary, pseudo_random);
+	/* -ENOTRECOVERABLE isn't a fatal error -- it means we should do a full
+	   scan of this eraseblock. So return zero */
+	if (ret == -ENOTRECOVERABLE)
+		return 0;
 	if (ret)
-		return ret;
+		return ret;		/* real error */
 
 	/* for PARANOIA_CHECK */
-	cache_ref = jffs2_alloc_raw_node_ref();
-
-	if (!cache_ref) {
-		JFFS2_NOTICE("Failed to allocate node ref for cache\n");
-		return -ENOMEM;
-	}
-
-	cache_ref->next_in_ino = NULL;
-	cache_ref->next_phys = NULL;
-	cache_ref->flash_offset = ofs | REF_NORMAL;
+	ret = jffs2_prealloc_raw_node_refs(c, jeb, 2);
+	if (ret)
+		return ret;
 
-	jffs2_link_node_ref(c, jeb, cache_ref, sumsize);
+	sum_link_node_ref(c, jeb, ofs | REF_NORMAL, sumsize, NULL);
 
-	jeb->wasted_size += jeb->free_size;
-	c->wasted_size += jeb->free_size;
-	c->free_size -= jeb->free_size;
-	jeb->free_size = 0;
+	if (unlikely(jeb->free_size)) {
+		JFFS2_WARNING("Free size 0x%x bytes in eraseblock @0x%08x with summary?\n",
+			      jeb->free_size, jeb->offset);
+		jeb->wasted_size += jeb->free_size;
+		c->wasted_size += jeb->free_size;
+		c->free_size -= jeb->free_size;
+		jeb->free_size = 0;
+	}
 
 	return jffs2_scan_classify_jeb(c, jeb);
 
@@ -681,6 +666,7 @@ static int jffs2_sum_write_data(struct jffs2_sb_info *c, struct jffs2_eraseblock
 	union jffs2_sum_mem *temp;
 	struct jffs2_sum_marker *sm;
 	struct kvec vecs[2];
+	uint32_t sum_ofs;
 	void *wpage;
 	int ret;
 	size_t retlen;
@@ -760,7 +746,14 @@ static int jffs2_sum_write_data(struct jffs2_sb_info *c, struct jffs2_eraseblock
 			}
 #endif
 			default : {
-				BUG();	/* unknown node in summary information */
+				if ((je16_to_cpu(temp->u.nodetype) & JFFS2_COMPAT_MASK)
+				    == JFFS2_FEATURE_RWCOMPAT_COPY) {
+					dbg_summary("Writing unknown RWCOMPAT_COPY node type %x\n",
+						    je16_to_cpu(temp->u.nodetype));
+					jffs2_sum_disable_collecting(c->summary);
+				} else {
+					BUG();	/* unknown node in summary information */
+				}
 			}
 		}
 
@@ -786,25 +779,34 @@ static int jffs2_sum_write_data(struct jffs2_sb_info *c, struct jffs2_eraseblock
 	vecs[1].iov_base = c->summary->sum_buf;
 	vecs[1].iov_len = datasize;
 
-	dbg_summary("JFFS2: writing out data to flash to pos : 0x%08x\n",
-			jeb->offset + c->sector_size - jeb->free_size);
+	sum_ofs = jeb->offset + c->sector_size - jeb->free_size;
 
-	spin_unlock(&c->erase_completion_lock);
-	ret = jffs2_flash_writev(c, vecs, 2, jeb->offset + c->sector_size -
-				jeb->free_size, &retlen, 0);
-	spin_lock(&c->erase_completion_lock);
+	dbg_summary("JFFS2: writing out data to flash to pos : 0x%08x\n",
+		    sum_ofs);
 
+	ret = jffs2_flash_writev(c, vecs, 2, sum_ofs, &retlen, 0);
 
 	if (ret || (retlen != infosize)) {
+
 		JFFS2_WARNING("Write of %u bytes at 0x%08x failed. returned %d, retlen %zd\n",
-			infosize, jeb->offset + c->sector_size - jeb->free_size, ret, retlen);
+			      infosize, sum_ofs, ret, retlen);
+
+		if (retlen) {
+			/* Waste remaining space */
+			spin_lock(&c->erase_completion_lock);
+			jffs2_link_node_ref(c, jeb, sum_ofs | REF_OBSOLETE, infosize, NULL);
+			spin_unlock(&c->erase_completion_lock);
+		}
 
 		c->summary->sum_size = JFFS2_SUMMARY_NOSUM_SIZE;
-		DIRTY_SPACE(infosize);
 
-		return 1;
+		return 0;
 	}
 
+	spin_lock(&c->erase_completion_lock);
+	jffs2_link_node_ref(c, jeb, sum_ofs | REF_NORMAL, infosize, NULL);
+	spin_unlock(&c->erase_completion_lock);
+
 	return 0;
 }
 
@@ -812,13 +814,16 @@ static int jffs2_sum_write_data(struct jffs2_sb_info *c, struct jffs2_eraseblock
 
 int jffs2_sum_write_sumnode(struct jffs2_sb_info *c)
 {
-	struct jffs2_raw_node_ref *summary_ref;
-	int datasize, infosize, padsize, ret;
+	int datasize, infosize, padsize;
 	struct jffs2_eraseblock *jeb;
+	int ret;
 
 	dbg_summary("called\n");
 
+	spin_unlock(&c->erase_completion_lock);
+
 	jeb = c->nextblock;
+	jffs2_prealloc_raw_node_refs(c, jeb, 1);
 
 	if (!c->summary->sum_num || !c->summary->sum_list_head) {
 		JFFS2_WARNING("Empty summary info!!!\n");
@@ -837,27 +842,11 @@ int jffs2_sum_write_sumnode(struct jffs2_sb_info *c)
 		jffs2_sum_disable_collecting(c->summary);
 
 		JFFS2_WARNING("Not enough space for summary, padsize = %d\n", padsize);
+		spin_lock(&c->erase_completion_lock);
 		return 0;
 	}
 
 	ret = jffs2_sum_write_data(c, jeb, infosize, datasize, padsize);
-	if (ret)
-		return 0; /* can't write out summary, block is marked as NOSUM_SIZE */
-
-	/* for ACCT_PARANOIA_CHECK */
-	spin_unlock(&c->erase_completion_lock);
-	summary_ref = jffs2_alloc_raw_node_ref();
 	spin_lock(&c->erase_completion_lock);
-
-	if (!summary_ref) {
-		JFFS2_NOTICE("Failed to allocate node ref for summary\n");
-		return -ENOMEM;
-	}
-
-	summary_ref->next_in_ino = NULL;
-	summary_ref->flash_offset = (jeb->offset + c->sector_size - jeb->free_size) | REF_NORMAL;
-
-	jffs2_link_node_ref(c, jeb, summary_ref, infosize);
-
-	return 0;
+	return ret;
 }