diff options
| author | Sascha Hauer | 2018-09-07 14:36:35 +0200 |
|---|---|---|
| committer | Richard Weinberger | 2018-10-23 13:48:39 +0200 |
| commit | 16a26b20d2afd0cf063816725b45b12e78d5bb31 (patch) | |
| tree | 3537a8eecd5da38204e443a887f4d1ed9f3cbcbe /fs/ubifs/master.c | |
| parent | ubifs: Add hashes to the tree node cache (diff) | |
| download | kernel-qcow2-linux-16a26b20d2afd0cf063816725b45b12e78d5bb31.tar.gz kernel-qcow2-linux-16a26b20d2afd0cf063816725b45b12e78d5bb31.tar.xz kernel-qcow2-linux-16a26b20d2afd0cf063816725b45b12e78d5bb31.zip | |
ubifs: authentication: Add hashes to index nodes
With this patch the hashes over the index nodes stored in the tree node
cache are written to flash and are checked when read back from flash.
The hash of the root index node is stored in the master node.
During journal replay the hashes are regenerated from the read nodes
and stored in the tree node cache. This means the nodes must previously
be authenticated by other means. This is done in a later patch.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Richard Weinberger <richard@nod.at>
Diffstat (limited to 'fs/ubifs/master.c')
| -rw-r--r-- | fs/ubifs/master.c | 3 |
1 files changed, 3 insertions, 0 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; |