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-rw-r--r--fs/ubifs/master.c3
-rw-r--r--fs/ubifs/misc.h5
-rw-r--r--fs/ubifs/replay.c29
-rw-r--r--fs/ubifs/tnc.c12
-rw-r--r--fs/ubifs/tnc_commit.c27
-rw-r--r--fs/ubifs/tnc_misc.c15
-rw-r--r--fs/ubifs/ubifs.h4
7 files changed, 81 insertions, 14 deletions
diff --git a/fs/ubifs/master.c b/fs/ubifs/master.c
index 9df4a41bba52..0ca9d3513b4d 100644
--- a/fs/ubifs/master.c
+++ b/fs/ubifs/master.c
@@ -305,6 +305,8 @@ int ubifs_read_master(struct ubifs_info *c)
 	c->lst.total_dead  = le64_to_cpu(c->mst_node->total_dead);
 	c->lst.total_dark  = le64_to_cpu(c->mst_node->total_dark);
 
+	ubifs_copy_hash(c, c->mst_node->hash_root_idx, c->zroot.hash);
+
 	c->calc_idx_sz = c->bi.old_idx_sz;
 
 	if (c->mst_node->flags & cpu_to_le32(UBIFS_MST_NO_ORPHS))
@@ -378,6 +380,7 @@ int ubifs_write_master(struct ubifs_info *c)
 	c->mst_offs = offs;
 	c->mst_node->highest_inum = cpu_to_le64(c->highest_inum);
 
+	ubifs_copy_hash(c, c->zroot.hash, c->mst_node->hash_root_idx);
 	err = ubifs_write_node(c, c->mst_node, len, lnum, offs);
 	if (err)
 		return err;
diff --git a/fs/ubifs/misc.h b/fs/ubifs/misc.h
index 21d35d7dd975..6f87237fdbf4 100644
--- a/fs/ubifs/misc.h
+++ b/fs/ubifs/misc.h
@@ -197,7 +197,8 @@ static inline int ubifs_return_leb(struct ubifs_info *c, int lnum)
  */
 static inline int ubifs_idx_node_sz(const struct ubifs_info *c, int child_cnt)
 {
-	return UBIFS_IDX_NODE_SZ + (UBIFS_BRANCH_SZ + c->key_len) * child_cnt;
+	return UBIFS_IDX_NODE_SZ + (UBIFS_BRANCH_SZ + c->key_len + c->hash_len)
+				   * child_cnt;
 }
 
 /**
@@ -212,7 +213,7 @@ struct ubifs_branch *ubifs_idx_branch(const struct ubifs_info *c,
 				      int bnum)
 {
 	return (struct ubifs_branch *)((void *)idx->branches +
-				       (UBIFS_BRANCH_SZ + c->key_len) * bnum);
+			(UBIFS_BRANCH_SZ + c->key_len + c->hash_len) * bnum);
 }
 
 /**
diff --git a/fs/ubifs/replay.c b/fs/ubifs/replay.c
index bccb35f72277..1c6ceb6265aa 100644
--- a/fs/ubifs/replay.c
+++ b/fs/ubifs/replay.c
@@ -56,6 +56,7 @@ struct replay_entry {
 	int lnum;
 	int offs;
 	int len;
+	u8 hash[UBIFS_HASH_ARR_SZ];
 	unsigned int deletion:1;
 	unsigned long long sqnum;
 	struct list_head list;
@@ -228,7 +229,7 @@ static int apply_replay_entry(struct ubifs_info *c, struct replay_entry *r)
 			err = ubifs_tnc_remove_nm(c, &r->key, &r->nm);
 		else
 			err = ubifs_tnc_add_nm(c, &r->key, r->lnum, r->offs,
-					       r->len, NULL, &r->nm);
+					       r->len, r->hash, &r->nm);
 	} else {
 		if (r->deletion)
 			switch (key_type(c, &r->key)) {
@@ -248,7 +249,7 @@ static int apply_replay_entry(struct ubifs_info *c, struct replay_entry *r)
 			}
 		else
 			err = ubifs_tnc_add(c, &r->key, r->lnum, r->offs,
-					    r->len, NULL);
+					    r->len, r->hash);
 		if (err)
 			return err;
 
@@ -352,9 +353,9 @@ static void destroy_replay_list(struct ubifs_info *c)
  * in case of success and a negative error code in case of failure.
  */
 static int insert_node(struct ubifs_info *c, int lnum, int offs, int len,
-		       union ubifs_key *key, unsigned long long sqnum,
-		       int deletion, int *used, loff_t old_size,
-		       loff_t new_size)
+		       const u8 *hash, union ubifs_key *key,
+		       unsigned long long sqnum, int deletion, int *used,
+		       loff_t old_size, loff_t new_size)
 {
 	struct replay_entry *r;
 
@@ -372,6 +373,7 @@ static int insert_node(struct ubifs_info *c, int lnum, int offs, int len,
 	r->lnum = lnum;
 	r->offs = offs;
 	r->len = len;
+	ubifs_copy_hash(c, hash, r->hash);
 	r->deletion = !!deletion;
 	r->sqnum = sqnum;
 	key_copy(c, key, &r->key);
@@ -400,8 +402,9 @@ static int insert_node(struct ubifs_info *c, int lnum, int offs, int len,
  * negative error code in case of failure.
  */
 static int insert_dent(struct ubifs_info *c, int lnum, int offs, int len,
-		       union ubifs_key *key, const char *name, int nlen,
-		       unsigned long long sqnum, int deletion, int *used)
+		       const u8 *hash, union ubifs_key *key,
+		       const char *name, int nlen, unsigned long long sqnum,
+		       int deletion, int *used)
 {
 	struct replay_entry *r;
 	char *nbuf;
@@ -425,6 +428,7 @@ static int insert_dent(struct ubifs_info *c, int lnum, int offs, int len,
 	r->lnum = lnum;
 	r->offs = offs;
 	r->len = len;
+	ubifs_copy_hash(c, hash, r->hash);
 	r->deletion = !!deletion;
 	r->sqnum = sqnum;
 	key_copy(c, key, &r->key);
@@ -582,6 +586,7 @@ static int replay_bud(struct ubifs_info *c, struct bud_entry *b)
 	 */
 
 	list_for_each_entry(snod, &sleb->nodes, list) {
+		u8 hash[UBIFS_HASH_ARR_SZ];
 		int deletion = 0;
 
 		cond_resched();
@@ -591,6 +596,8 @@ static int replay_bud(struct ubifs_info *c, struct bud_entry *b)
 			goto out_dump;
 		}
 
+		ubifs_node_calc_hash(c, snod->node, hash);
+
 		if (snod->sqnum > c->max_sqnum)
 			c->max_sqnum = snod->sqnum;
 
@@ -602,7 +609,7 @@ static int replay_bud(struct ubifs_info *c, struct bud_entry *b)
 
 			if (le32_to_cpu(ino->nlink) == 0)
 				deletion = 1;
-			err = insert_node(c, lnum, snod->offs, snod->len,
+			err = insert_node(c, lnum, snod->offs, snod->len, hash,
 					  &snod->key, snod->sqnum, deletion,
 					  &used, 0, new_size);
 			break;
@@ -614,7 +621,7 @@ static int replay_bud(struct ubifs_info *c, struct bud_entry *b)
 					  key_block(c, &snod->key) *
 					  UBIFS_BLOCK_SIZE;
 
-			err = insert_node(c, lnum, snod->offs, snod->len,
+			err = insert_node(c, lnum, snod->offs, snod->len, hash,
 					  &snod->key, snod->sqnum, deletion,
 					  &used, 0, new_size);
 			break;
@@ -628,7 +635,7 @@ static int replay_bud(struct ubifs_info *c, struct bud_entry *b)
 			if (err)
 				goto out_dump;
 
-			err = insert_dent(c, lnum, snod->offs, snod->len,
+			err = insert_dent(c, lnum, snod->offs, snod->len, hash,
 					  &snod->key, dent->name,
 					  le16_to_cpu(dent->nlen), snod->sqnum,
 					  !le64_to_cpu(dent->inum), &used);
@@ -654,7 +661,7 @@ static int replay_bud(struct ubifs_info *c, struct bud_entry *b)
 			 * functions which expect nodes to have keys.
 			 */
 			trun_key_init(c, &key, le32_to_cpu(trun->inum));
-			err = insert_node(c, lnum, snod->offs, snod->len,
+			err = insert_node(c, lnum, snod->offs, snod->len, hash,
 					  &key, snod->sqnum, 1, &used,
 					  old_size, new_size);
 			break;
diff --git a/fs/ubifs/tnc.c b/fs/ubifs/tnc.c
index bb5f989a6e06..25572ffea163 100644
--- a/fs/ubifs/tnc.c
+++ b/fs/ubifs/tnc.c
@@ -488,6 +488,12 @@ static int try_read_node(const struct ubifs_info *c, void *buf, int type,
 	if (crc != node_crc)
 		return 0;
 
+	err = ubifs_node_check_hash(c, buf, zbr->hash);
+	if (err) {
+		ubifs_bad_hash(c, buf, zbr->hash, lnum, offs);
+		return 0;
+	}
+
 	return 1;
 }
 
@@ -1713,6 +1719,12 @@ static int validate_data_node(struct ubifs_info *c, void *buf,
 		goto out;
 	}
 
+	err = ubifs_node_check_hash(c, buf, zbr->hash);
+	if (err) {
+		ubifs_bad_hash(c, buf, zbr->hash, zbr->lnum, zbr->offs);
+		return err;
+	}
+
 	len = le32_to_cpu(ch->len);
 	if (len != zbr->len) {
 		ubifs_err(c, "bad node length %d, expected %d", len, zbr->len);
diff --git a/fs/ubifs/tnc_commit.c b/fs/ubifs/tnc_commit.c
index dba87d09b989..dbcd2c350b65 100644
--- a/fs/ubifs/tnc_commit.c
+++ b/fs/ubifs/tnc_commit.c
@@ -38,6 +38,7 @@ static int make_idx_node(struct ubifs_info *c, struct ubifs_idx_node *idx,
 			 struct ubifs_znode *znode, int lnum, int offs, int len)
 {
 	struct ubifs_znode *zp;
+	u8 hash[UBIFS_HASH_ARR_SZ];
 	int i, err;
 
 	/* Make index node */
@@ -52,6 +53,7 @@ static int make_idx_node(struct ubifs_info *c, struct ubifs_idx_node *idx,
 		br->lnum = cpu_to_le32(zbr->lnum);
 		br->offs = cpu_to_le32(zbr->offs);
 		br->len = cpu_to_le32(zbr->len);
+		ubifs_copy_hash(c, zbr->hash, ubifs_branch_hash(c, br));
 		if (!zbr->lnum || !zbr->len) {
 			ubifs_err(c, "bad ref in znode");
 			ubifs_dump_znode(c, znode);
@@ -62,6 +64,7 @@ static int make_idx_node(struct ubifs_info *c, struct ubifs_idx_node *idx,
 		}
 	}
 	ubifs_prepare_node(c, idx, len, 0);
+	ubifs_node_calc_hash(c, idx, hash);
 
 	znode->lnum = lnum;
 	znode->offs = offs;
@@ -78,10 +81,12 @@ static int make_idx_node(struct ubifs_info *c, struct ubifs_idx_node *idx,
 		zbr->lnum = lnum;
 		zbr->offs = offs;
 		zbr->len = len;
+		ubifs_copy_hash(c, hash, zbr->hash);
 	} else {
 		c->zroot.lnum = lnum;
 		c->zroot.offs = offs;
 		c->zroot.len = len;
+		ubifs_copy_hash(c, hash, c->zroot.hash);
 	}
 	c->calc_idx_sz += ALIGN(len, 8);
 
@@ -647,6 +652,8 @@ static int get_znodes_to_commit(struct ubifs_info *c)
 			znode->cnext = c->cnext;
 			break;
 		}
+		znode->cparent = znode->parent;
+		znode->ciip = znode->iip;
 		znode->cnext = cnext;
 		znode = cnext;
 		cnt += 1;
@@ -840,6 +847,8 @@ static int write_index(struct ubifs_info *c)
 	}
 
 	while (1) {
+		u8 hash[UBIFS_HASH_ARR_SZ];
+
 		cond_resched();
 
 		znode = cnext;
@@ -857,6 +866,7 @@ static int write_index(struct ubifs_info *c)
 			br->lnum = cpu_to_le32(zbr->lnum);
 			br->offs = cpu_to_le32(zbr->offs);
 			br->len = cpu_to_le32(zbr->len);
+			ubifs_copy_hash(c, zbr->hash, ubifs_branch_hash(c, br));
 			if (!zbr->lnum || !zbr->len) {
 				ubifs_err(c, "bad ref in znode");
 				ubifs_dump_znode(c, znode);
@@ -868,6 +878,23 @@ static int write_index(struct ubifs_info *c)
 		}
 		len = ubifs_idx_node_sz(c, znode->child_cnt);
 		ubifs_prepare_node(c, idx, len, 0);
+		ubifs_node_calc_hash(c, idx, hash);
+
+		mutex_lock(&c->tnc_mutex);
+
+		if (znode->cparent)
+			ubifs_copy_hash(c, hash,
+					znode->cparent->zbranch[znode->ciip].hash);
+
+		if (znode->parent) {
+			if (!ubifs_zn_obsolete(znode))
+				ubifs_copy_hash(c, hash,
+					znode->parent->zbranch[znode->iip].hash);
+		} else {
+			ubifs_copy_hash(c, hash, c->zroot.hash);
+		}
+
+		mutex_unlock(&c->tnc_mutex);
 
 		/* Determine the index node position */
 		if (lnum == -1) {
diff --git a/fs/ubifs/tnc_misc.c b/fs/ubifs/tnc_misc.c
index 6ce75999f273..d1815e959007 100644
--- a/fs/ubifs/tnc_misc.c
+++ b/fs/ubifs/tnc_misc.c
@@ -293,6 +293,12 @@ static int read_znode(struct ubifs_info *c, struct ubifs_zbranch *zzbr,
 		return err;
 	}
 
+	err = ubifs_node_check_hash(c, idx, zzbr->hash);
+	if (err) {
+		ubifs_bad_hash(c, idx, zzbr->hash, lnum, offs);
+		return err;
+	}
+
 	znode->child_cnt = le16_to_cpu(idx->child_cnt);
 	znode->level = le16_to_cpu(idx->level);
 
@@ -309,13 +315,14 @@ static int read_znode(struct ubifs_info *c, struct ubifs_zbranch *zzbr,
 	}
 
 	for (i = 0; i < znode->child_cnt; i++) {
-		const struct ubifs_branch *br = ubifs_idx_branch(c, idx, i);
+		struct ubifs_branch *br = ubifs_idx_branch(c, idx, i);
 		struct ubifs_zbranch *zbr = &znode->zbranch[i];
 
 		key_read(c, &br->key, &zbr->key);
 		zbr->lnum = le32_to_cpu(br->lnum);
 		zbr->offs = le32_to_cpu(br->offs);
 		zbr->len  = le32_to_cpu(br->len);
+		ubifs_copy_hash(c, ubifs_branch_hash(c, br), zbr->hash);
 		zbr->znode = NULL;
 
 		/* Validate branch */
@@ -497,5 +504,11 @@ int ubifs_tnc_read_node(struct ubifs_info *c, struct ubifs_zbranch *zbr,
 		return -EINVAL;
 	}
 
+	err = ubifs_node_check_hash(c, node, zbr->hash);
+	if (err) {
+		ubifs_bad_hash(c, node, zbr->hash, zbr->lnum, zbr->offs);
+		return err;
+	}
+
 	return 0;
 }
diff --git a/fs/ubifs/ubifs.h b/fs/ubifs/ubifs.h
index a7e423347e6d..67bfd58d28d4 100644
--- a/fs/ubifs/ubifs.h
+++ b/fs/ubifs/ubifs.h
@@ -765,6 +765,8 @@ struct ubifs_zbranch {
  * struct ubifs_znode - in-memory representation of an indexing node.
  * @parent: parent znode or NULL if it is the root
  * @cnext: next znode to commit
+ * @cparent: parent node for this commit
+ * @ciip: index in cparent's zbranch array
  * @flags: znode flags (%DIRTY_ZNODE, %COW_ZNODE or %OBSOLETE_ZNODE)
  * @time: last access time (seconds)
  * @level: level of the entry in the TNC tree
@@ -782,6 +784,8 @@ struct ubifs_zbranch {
 struct ubifs_znode {
 	struct ubifs_znode *parent;
 	struct ubifs_znode *cnext;
+	struct ubifs_znode *cparent;
+	int ciip;
 	unsigned long flags;
 	time64_t time;
 	int level;
generated by cgit-pink 1.4.1 (git 2.36.1) at 2024-10-19 19:59:35 +0000