diff options
| author | Sascha Hauer <s.hauer@pengutronix.de> | 2018-09-07 15:36:35 +0300 |
|---|---|---|
| committer | Richard Weinberger <richard@nod.at> | 2018-10-23 14:48:39 +0300 |
| commit | 16a26b20d2afd0cf063816725b45b12e78d5bb31 (patch) | |
| tree | 3537a8eecd5da38204e443a887f4d1ed9f3cbcbe /fs/ubifs/misc.h | |
| parent | 823838a486888cf484e739ab37df14cb04dfddb5 (diff) | |
| download | linux-16a26b20d2afd0cf063816725b45b12e78d5bb31.tar.xz | |
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/misc.h')
| -rw-r--r-- | fs/ubifs/misc.h | 5 |
1 files changed, 3 insertions, 2 deletions
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); } /** |