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ubifs: Add auth nodes to garbage collector journal head

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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>
This commit is contained in:
Sascha Hauer 2018-09-07 14:36:37 +02:00 committed by Richard Weinberger
parent 6a98bc4614
commit 6f06d96fdf
1 changed files with 43 additions and 3 deletions
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46
fs/ubifs/gc.c
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@ -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))