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| author | Sascha Hauer <s.hauer@pengutronix.de> | 2018-09-07 14:36:37 +0200 |
|---|---|---|
| committer | Richard Weinberger <richard@nod.at> | 2018-10-23 13:48:40 +0200 |
| commit | 6f06d96fdf624be3e1d65c6100704a1fd79a30b7 (patch) | |
| tree | 9f73bc0c8b651130327943b8b198aa781513e50e | |
| parent | 6a98bc4614de8fac8c6d520a6b20b194e23c9936 (diff) | |
| download | linux-0-day-6f06d96fdf624be3e1d65c6100704a1fd79a30b7.tar.gz linux-0-day-6f06d96fdf624be3e1d65c6100704a1fd79a30b7.tar.xz | |
ubifs: Add auth nodes to garbage collector journal head
To be able to authenticate the garbage collector journal head add
authentication nodes to the buds the garbage collector creates.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: Richard Weinberger <richard@nod.at>
| -rw-r--r-- | fs/ubifs/gc.c | 46 |
1 files changed, 43 insertions, 3 deletions
diff --git a/fs/ubifs/gc.c b/fs/ubifs/gc.c index 399d764f83cb1..bf75fdc76fc35 100644 --- a/fs/ubifs/gc.c +++ b/fs/ubifs/gc.c @@ -365,12 +365,13 @@ static int move_nodes(struct ubifs_info *c, struct ubifs_scan_leb *sleb) /* Write nodes to their new location. Use the first-fit strategy */ while (1) { - int avail; + int avail, moved = 0; struct ubifs_scan_node *snod, *tmp; /* Move data nodes */ list_for_each_entry_safe(snod, tmp, &sleb->nodes, list) { - avail = c->leb_size - wbuf->offs - wbuf->used; + avail = c->leb_size - wbuf->offs - wbuf->used - + ubifs_auth_node_sz(c); if (snod->len > avail) /* * Do not skip data nodes in order to optimize @@ -378,14 +379,21 @@ static int move_nodes(struct ubifs_info *c, struct ubifs_scan_leb *sleb) */ break; + err = ubifs_shash_update(c, c->jheads[GCHD].log_hash, + snod->node, snod->len); + if (err) + goto out; + err = move_node(c, sleb, snod, wbuf); if (err) goto out; + moved = 1; } /* Move non-data nodes */ list_for_each_entry_safe(snod, tmp, &nondata, list) { - avail = c->leb_size - wbuf->offs - wbuf->used; + avail = c->leb_size - wbuf->offs - wbuf->used - + ubifs_auth_node_sz(c); if (avail < min) break; @@ -403,9 +411,41 @@ static int move_nodes(struct ubifs_info *c, struct ubifs_scan_leb *sleb) continue; } + err = ubifs_shash_update(c, c->jheads[GCHD].log_hash, + snod->node, snod->len); + if (err) + goto out; + err = move_node(c, sleb, snod, wbuf); if (err) goto out; + moved = 1; + } + + if (ubifs_authenticated(c) && moved) { + struct ubifs_auth_node *auth; + + auth = kmalloc(ubifs_auth_node_sz(c), GFP_NOFS); + if (!auth) { + err = -ENOMEM; + goto out; + } + + err = ubifs_prepare_auth_node(c, auth, + c->jheads[GCHD].log_hash); + if (err) { + kfree(auth); + goto out; + } + + err = ubifs_wbuf_write_nolock(wbuf, auth, + ubifs_auth_node_sz(c)); + if (err) { + kfree(auth); + goto out; + } + + ubifs_add_dirt(c, wbuf->lnum, ubifs_auth_node_sz(c)); } if (list_empty(&sleb->nodes) && list_empty(&nondata)) |