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-rw-r--r--fs/ubifs/gc.c3
-rw-r--r--fs/ubifs/journal.c124
-rw-r--r--fs/ubifs/log.c24
-rw-r--r--fs/ubifs/replay.c2
-rw-r--r--fs/ubifs/super.c10
-rw-r--r--fs/ubifs/ubifs.h8
6 files changed, 153 insertions, 18 deletions
diff --git a/fs/ubifs/gc.c b/fs/ubifs/gc.c
index d2680e0b4a36f..399d764f83cb1 100644
--- a/fs/ubifs/gc.c
+++ b/fs/ubifs/gc.c
@@ -254,7 +254,8 @@ static int sort_nodes(struct ubifs_info *c, struct ubifs_scan_leb *sleb,
snod->type == UBIFS_DATA_NODE ||
snod->type == UBIFS_DENT_NODE ||
snod->type == UBIFS_XENT_NODE ||
- snod->type == UBIFS_TRUN_NODE);
+ snod->type == UBIFS_TRUN_NODE ||
+ snod->type == UBIFS_AUTH_NODE);
if (snod->type != UBIFS_INO_NODE &&
snod->type != UBIFS_DATA_NODE &&
diff --git a/fs/ubifs/journal.c b/fs/ubifs/journal.c
index 7c12bdfa9a7aa..729dc76c83dff 100644
--- a/fs/ubifs/journal.c
+++ b/fs/ubifs/journal.c
@@ -90,6 +90,12 @@ static inline void zero_trun_node_unused(struct ubifs_trun_node *trun)
memset(trun->padding, 0, 12);
}
+static void ubifs_add_auth_dirt(struct ubifs_info *c, int lnum)
+{
+ if (ubifs_authenticated(c))
+ ubifs_add_dirt(c, lnum, ubifs_auth_node_sz(c));
+}
+
/**
* reserve_space - reserve space in the journal.
* @c: UBIFS file-system description object
@@ -228,6 +234,35 @@ out_return:
return err;
}
+static int ubifs_hash_nodes(struct ubifs_info *c, void *node,
+ int len, struct shash_desc *hash)
+{
+ int auth_node_size = ubifs_auth_node_sz(c);
+ int err;
+
+ while (1) {
+ const struct ubifs_ch *ch = node;
+ int nodelen = le32_to_cpu(ch->len);
+
+ ubifs_assert(c, len >= auth_node_size);
+
+ if (len == auth_node_size)
+ break;
+
+ ubifs_assert(c, len > nodelen);
+ ubifs_assert(c, ch->magic == cpu_to_le32(UBIFS_NODE_MAGIC));
+
+ err = ubifs_shash_update(c, hash, (void *)node, nodelen);
+ if (err)
+ return err;
+
+ node += ALIGN(nodelen, 8);
+ len -= ALIGN(nodelen, 8);
+ }
+
+ return ubifs_prepare_auth_node(c, node, hash);
+}
+
/**
* write_head - write data to a journal head.
* @c: UBIFS file-system description object
@@ -255,6 +290,12 @@ static int write_head(struct ubifs_info *c, int jhead, void *buf, int len,
dbg_jnl("jhead %s, LEB %d:%d, len %d",
dbg_jhead(jhead), *lnum, *offs, len);
+ if (ubifs_authenticated(c)) {
+ err = ubifs_hash_nodes(c, buf, len, c->jheads[jhead].log_hash);
+ if (err)
+ return err;
+ }
+
err = ubifs_wbuf_write_nolock(wbuf, buf, len);
if (err)
return err;
@@ -543,7 +584,10 @@ int ubifs_jnl_update(struct ubifs_info *c, const struct inode *dir,
len = aligned_dlen + aligned_ilen + UBIFS_INO_NODE_SZ;
/* Make sure to also account for extended attributes */
- len += host_ui->data_len;
+ if (ubifs_authenticated(c))
+ len += ALIGN(host_ui->data_len, 8) + ubifs_auth_node_sz(c);
+ else
+ len += host_ui->data_len;
dent = kzalloc(len, GFP_NOFS);
if (!dent)
@@ -611,6 +655,7 @@ int ubifs_jnl_update(struct ubifs_info *c, const struct inode *dir,
}
release_head(c, BASEHD);
kfree(dent);
+ ubifs_add_auth_dirt(c, lnum);
if (deletion) {
if (nm->hash)
@@ -690,8 +735,9 @@ int ubifs_jnl_write_data(struct ubifs_info *c, const struct inode *inode,
const union ubifs_key *key, const void *buf, int len)
{
struct ubifs_data_node *data;
- int err, lnum, offs, compr_type, out_len, compr_len;
+ int err, lnum, offs, compr_type, out_len, compr_len, auth_len;
int dlen = COMPRESSED_DATA_NODE_BUF_SZ, allocated = 1;
+ int write_len;
struct ubifs_inode *ui = ubifs_inode(inode);
bool encrypted = ubifs_crypt_is_encrypted(inode);
u8 hash[UBIFS_HASH_ARR_SZ];
@@ -703,7 +749,9 @@ int ubifs_jnl_write_data(struct ubifs_info *c, const struct inode *inode,
if (encrypted)
dlen += UBIFS_CIPHER_BLOCK_SIZE;
- data = kmalloc(dlen, GFP_NOFS | __GFP_NOWARN);
+ auth_len = ubifs_auth_node_sz(c);
+
+ data = kmalloc(dlen + auth_len, GFP_NOFS | __GFP_NOWARN);
if (!data) {
/*
* Fall-back to the write reserve buffer. Note, we might be
@@ -742,15 +790,20 @@ int ubifs_jnl_write_data(struct ubifs_info *c, const struct inode *inode,
}
dlen = UBIFS_DATA_NODE_SZ + out_len;
+ if (ubifs_authenticated(c))
+ write_len = ALIGN(dlen, 8) + auth_len;
+ else
+ write_len = dlen;
+
data->compr_type = cpu_to_le16(compr_type);
/* Make reservation before allocating sequence numbers */
- err = make_reservation(c, DATAHD, dlen);
+ err = make_reservation(c, DATAHD, write_len);
if (err)
goto out_free;
ubifs_prepare_node(c, data, dlen, 0);
- err = write_head(c, DATAHD, data, dlen, &lnum, &offs, 0);
+ err = write_head(c, DATAHD, data, write_len, &lnum, &offs, 0);
if (err)
goto out_release;
@@ -761,6 +814,8 @@ int ubifs_jnl_write_data(struct ubifs_info *c, const struct inode *inode,
ubifs_wbuf_add_ino_nolock(&c->jheads[DATAHD].wbuf, key_inum(c, key));
release_head(c, DATAHD);
+ ubifs_add_auth_dirt(c, lnum);
+
err = ubifs_tnc_add(c, key, lnum, offs, dlen, hash);
if (err)
goto out_ro;
@@ -799,7 +854,8 @@ int ubifs_jnl_write_inode(struct ubifs_info *c, const struct inode *inode)
int err, lnum, offs;
struct ubifs_ino_node *ino;
struct ubifs_inode *ui = ubifs_inode(inode);
- int sync = 0, len = UBIFS_INO_NODE_SZ, last_reference = !inode->i_nlink;
+ int sync = 0, write_len, ilen = UBIFS_INO_NODE_SZ;
+ int last_reference = !inode->i_nlink;
u8 hash[UBIFS_HASH_ARR_SZ];
dbg_jnl("ino %lu, nlink %u", inode->i_ino, inode->i_nlink);
@@ -809,15 +865,21 @@ int ubifs_jnl_write_inode(struct ubifs_info *c, const struct inode *inode)
* need to synchronize the write-buffer either.
*/
if (!last_reference) {
- len += ui->data_len;
+ ilen += ui->data_len;
sync = IS_SYNC(inode);
}
- ino = kmalloc(len, GFP_NOFS);
+
+ if (ubifs_authenticated(c))
+ write_len = ALIGN(ilen, 8) + ubifs_auth_node_sz(c);
+ else
+ write_len = ilen;
+
+ ino = kmalloc(write_len, GFP_NOFS);
if (!ino)
return -ENOMEM;
/* Make reservation before allocating sequence numbers */
- err = make_reservation(c, BASEHD, len);
+ err = make_reservation(c, BASEHD, write_len);
if (err)
goto out_free;
@@ -826,7 +888,7 @@ int ubifs_jnl_write_inode(struct ubifs_info *c, const struct inode *inode)
if (err)
goto out_release;
- err = write_head(c, BASEHD, ino, len, &lnum, &offs, sync);
+ err = write_head(c, BASEHD, ino, write_len, &lnum, &offs, sync);
if (err)
goto out_release;
if (!sync)
@@ -834,17 +896,19 @@ int ubifs_jnl_write_inode(struct ubifs_info *c, const struct inode *inode)
inode->i_ino);
release_head(c, BASEHD);
+ ubifs_add_auth_dirt(c, lnum);
+
if (last_reference) {
err = ubifs_tnc_remove_ino(c, inode->i_ino);
if (err)
goto out_ro;
ubifs_delete_orphan(c, inode->i_ino);
- err = ubifs_add_dirt(c, lnum, len);
+ err = ubifs_add_dirt(c, lnum, ilen);
} else {
union ubifs_key key;
ino_key_init(c, &key, inode->i_ino);
- err = ubifs_tnc_add(c, &key, lnum, offs, len, hash);
+ err = ubifs_tnc_add(c, &key, lnum, offs, ilen, hash);
}
if (err)
goto out_ro;
@@ -973,6 +1037,8 @@ int ubifs_jnl_xrename(struct ubifs_info *c, const struct inode *fst_dir,
if (twoparents)
len += plen;
+ len += ubifs_auth_node_sz(c);
+
dent1 = kzalloc(len, GFP_NOFS);
if (!dent1)
return -ENOMEM;
@@ -1042,6 +1108,8 @@ int ubifs_jnl_xrename(struct ubifs_info *c, const struct inode *fst_dir,
}
release_head(c, BASEHD);
+ ubifs_add_auth_dirt(c, lnum);
+
dent_key_init(c, &key, snd_dir->i_ino, snd_nm);
err = ubifs_tnc_add_nm(c, &key, lnum, offs, dlen1, hash_dent1, snd_nm);
if (err)
@@ -1143,6 +1211,9 @@ int ubifs_jnl_rename(struct ubifs_info *c, const struct inode *old_dir,
len = aligned_dlen1 + aligned_dlen2 + ALIGN(ilen, 8) + ALIGN(plen, 8);
if (move)
len += plen;
+
+ len += ubifs_auth_node_sz(c);
+
dent = kzalloc(len, GFP_NOFS);
if (!dent)
return -ENOMEM;
@@ -1240,6 +1311,8 @@ int ubifs_jnl_rename(struct ubifs_info *c, const struct inode *old_dir,
}
release_head(c, BASEHD);
+ ubifs_add_auth_dirt(c, lnum);
+
dent_key_init(c, &key, new_dir->i_ino, new_nm);
err = ubifs_tnc_add_nm(c, &key, lnum, offs, dlen1, hash_dent1, new_nm);
if (err)
@@ -1411,6 +1484,9 @@ int ubifs_jnl_truncate(struct ubifs_info *c, const struct inode *inode,
sz = UBIFS_TRUN_NODE_SZ + UBIFS_INO_NODE_SZ +
UBIFS_MAX_DATA_NODE_SZ * WORST_COMPR_FACTOR;
+
+ sz += ubifs_auth_node_sz(c);
+
ino = kmalloc(sz, GFP_NOFS);
if (!ino)
return -ENOMEM;
@@ -1456,8 +1532,12 @@ int ubifs_jnl_truncate(struct ubifs_info *c, const struct inode *inode,
/* Must make reservation before allocating sequence numbers */
len = UBIFS_TRUN_NODE_SZ + UBIFS_INO_NODE_SZ;
- if (dlen)
+
+ if (ubifs_authenticated(c))
+ len += ALIGN(dlen, 8) + ubifs_auth_node_sz(c);
+ else
len += dlen;
+
err = make_reservation(c, BASEHD, len);
if (err)
goto out_free;
@@ -1482,6 +1562,8 @@ int ubifs_jnl_truncate(struct ubifs_info *c, const struct inode *inode,
ubifs_wbuf_add_ino_nolock(&c->jheads[BASEHD].wbuf, inum);
release_head(c, BASEHD);
+ ubifs_add_auth_dirt(c, lnum);
+
if (dlen) {
sz = offs + UBIFS_INO_NODE_SZ + UBIFS_TRUN_NODE_SZ;
err = ubifs_tnc_add(c, &key, lnum, sz, dlen, hash_dn);
@@ -1545,7 +1627,7 @@ int ubifs_jnl_delete_xattr(struct ubifs_info *c, const struct inode *host,
const struct inode *inode,
const struct fscrypt_name *nm)
{
- int err, xlen, hlen, len, lnum, xent_offs, aligned_xlen;
+ int err, xlen, hlen, len, lnum, xent_offs, aligned_xlen, write_len;
struct ubifs_dent_node *xent;
struct ubifs_ino_node *ino;
union ubifs_key xent_key, key1, key2;
@@ -1565,12 +1647,14 @@ int ubifs_jnl_delete_xattr(struct ubifs_info *c, const struct inode *host,
hlen = host_ui->data_len + UBIFS_INO_NODE_SZ;
len = aligned_xlen + UBIFS_INO_NODE_SZ + ALIGN(hlen, 8);
- xent = kzalloc(len, GFP_NOFS);
+ write_len = len + ubifs_auth_node_sz(c);
+
+ xent = kzalloc(write_len, GFP_NOFS);
if (!xent)
return -ENOMEM;
/* Make reservation before allocating sequence numbers */
- err = make_reservation(c, BASEHD, len);
+ err = make_reservation(c, BASEHD, write_len);
if (err) {
kfree(xent);
return err;
@@ -1595,10 +1679,12 @@ int ubifs_jnl_delete_xattr(struct ubifs_info *c, const struct inode *host,
if (err)
goto out_release;
- err = write_head(c, BASEHD, xent, len, &lnum, &xent_offs, sync);
+ err = write_head(c, BASEHD, xent, write_len, &lnum, &xent_offs, sync);
if (!sync && !err)
ubifs_wbuf_add_ino_nolock(&c->jheads[BASEHD].wbuf, host->i_ino);
release_head(c, BASEHD);
+
+ ubifs_add_auth_dirt(c, lnum);
kfree(xent);
if (err)
goto out_ro;
@@ -1680,6 +1766,8 @@ int ubifs_jnl_change_xattr(struct ubifs_info *c, const struct inode *inode,
aligned_len1 = ALIGN(len1, 8);
aligned_len = aligned_len1 + ALIGN(len2, 8);
+ aligned_len += ubifs_auth_node_sz(c);
+
ino = kzalloc(aligned_len, GFP_NOFS);
if (!ino)
return -ENOMEM;
@@ -1709,6 +1797,8 @@ int ubifs_jnl_change_xattr(struct ubifs_info *c, const struct inode *inode,
if (err)
goto out_ro;
+ ubifs_add_auth_dirt(c, lnum);
+
ino_key_init(c, &key, host->i_ino);
err = ubifs_tnc_add(c, &key, lnum, offs, len1, hash_host);
if (err)
diff --git a/fs/ubifs/log.c b/fs/ubifs/log.c
index 86b0828f54991..15fd854149bbf 100644
--- a/fs/ubifs/log.c
+++ b/fs/ubifs/log.c
@@ -236,6 +236,7 @@ int ubifs_add_bud_to_log(struct ubifs_info *c, int jhead, int lnum, int offs)
bud->lnum = lnum;
bud->start = offs;
bud->jhead = jhead;
+ bud->log_hash = NULL;
ref->ch.node_type = UBIFS_REF_NODE;
ref->lnum = cpu_to_le32(bud->lnum);
@@ -275,6 +276,14 @@ int ubifs_add_bud_to_log(struct ubifs_info *c, int jhead, int lnum, int offs)
if (err)
goto out_unlock;
+ err = ubifs_shash_update(c, c->log_hash, ref, UBIFS_REF_NODE_SZ);
+ if (err)
+ goto out_unlock;
+
+ err = ubifs_shash_copy_state(c, c->log_hash, c->jheads[jhead].log_hash);
+ if (err)
+ goto out_unlock;
+
c->lhead_offs += c->ref_node_alsz;
ubifs_add_bud(c, bud);
@@ -377,6 +386,14 @@ int ubifs_log_start_commit(struct ubifs_info *c, int *ltail_lnum)
cs->cmt_no = cpu_to_le64(c->cmt_no);
ubifs_prepare_node(c, cs, UBIFS_CS_NODE_SZ, 0);
+ err = ubifs_shash_init(c, c->log_hash);
+ if (err)
+ goto out;
+
+ err = ubifs_shash_update(c, c->log_hash, cs, UBIFS_CS_NODE_SZ);
+ if (err < 0)
+ goto out;
+
/*
* Note, we do not lock 'c->log_mutex' because this is the commit start
* phase and we are exclusively using the log. And we do not lock
@@ -402,6 +419,12 @@ int ubifs_log_start_commit(struct ubifs_info *c, int *ltail_lnum)
ubifs_prepare_node(c, ref, UBIFS_REF_NODE_SZ, 0);
len += UBIFS_REF_NODE_SZ;
+
+ err = ubifs_shash_update(c, c->log_hash, ref,
+ UBIFS_REF_NODE_SZ);
+ if (err)
+ goto out;
+ ubifs_shash_copy_state(c, c->log_hash, c->jheads[i].log_hash);
}
ubifs_pad(c, buf + len, ALIGN(len, c->min_io_size) - len);
@@ -516,6 +539,7 @@ int ubifs_log_post_commit(struct ubifs_info *c, int old_ltail_lnum)
if (err)
return err;
list_del(&bud->list);
+ kfree(bud->log_hash);
kfree(bud);
}
mutex_lock(&c->log_mutex);
diff --git a/fs/ubifs/replay.c b/fs/ubifs/replay.c
index 1c6ceb6265aa3..db489d93439c1 100644
--- a/fs/ubifs/replay.c
+++ b/fs/ubifs/replay.c
@@ -666,6 +666,8 @@ static int replay_bud(struct ubifs_info *c, struct bud_entry *b)
old_size, new_size);
break;
}
+ case UBIFS_AUTH_NODE:
+ break;
default:
ubifs_err(c, "unexpected node type %d in bud LEB %d:%d",
snod->type, lnum, snod->offs);
diff --git a/fs/ubifs/super.c b/fs/ubifs/super.c
index 0194e3c0853f6..2722ca077d234 100644
--- a/fs/ubifs/super.c
+++ b/fs/ubifs/super.c
@@ -817,6 +817,9 @@ static int alloc_wbufs(struct ubifs_info *c)
c->jheads[i].wbuf.sync_callback = &bud_wbuf_callback;
c->jheads[i].wbuf.jhead = i;
c->jheads[i].grouped = 1;
+ c->jheads[i].log_hash = ubifs_hash_get_desc(c);
+ if (IS_ERR(c->jheads[i].log_hash))
+ goto out;
}
/*
@@ -827,6 +830,12 @@ static int alloc_wbufs(struct ubifs_info *c)
c->jheads[GCHD].grouped = 0;
return 0;
+
+out:
+ while (i--)
+ kfree(c->jheads[i].log_hash);
+
+ return err;
}
/**
@@ -841,6 +850,7 @@ static void free_wbufs(struct ubifs_info *c)
for (i = 0; i < c->jhead_cnt; i++) {
kfree(c->jheads[i].wbuf.buf);
kfree(c->jheads[i].wbuf.inodes);
+ kfree(c->jheads[i].log_hash);
}
kfree(c->jheads);
c->jheads = NULL;
diff --git a/fs/ubifs/ubifs.h b/fs/ubifs/ubifs.h
index 67bfd58d28d46..600a25b93a809 100644
--- a/fs/ubifs/ubifs.h
+++ b/fs/ubifs/ubifs.h
@@ -717,6 +717,7 @@ struct ubifs_wbuf {
* @jhead: journal head number this bud belongs to
* @list: link in the list buds belonging to the same journal head
* @rb: link in the tree of all buds
+ * @log_hash: the log hash from the commit start node up to this bud
*/
struct ubifs_bud {
int lnum;
@@ -724,6 +725,7 @@ struct ubifs_bud {
int jhead;
struct list_head list;
struct rb_node rb;
+ struct shash_desc *log_hash;
};
/**
@@ -731,6 +733,7 @@ struct ubifs_bud {
* @wbuf: head's write-buffer
* @buds_list: list of bud LEBs belonging to this journal head
* @grouped: non-zero if UBIFS groups nodes when writing to this journal head
+ * @log_hash: the log hash from the commit start node up to this journal head
*
* Note, the @buds list is protected by the @c->buds_lock.
*/
@@ -738,6 +741,7 @@ struct ubifs_jhead {
struct ubifs_wbuf wbuf;
struct list_head buds_list;
unsigned int grouped:1;
+ struct shash_desc *log_hash;
};
/**
@@ -1236,6 +1240,8 @@ struct ubifs_debug_info;
* @auth_key_name: the authentication key name
* @auth_hash_name: the name of the hash algorithm used for authentication
* @auth_hash_algo: the authentication hash used for this fs
+ * @log_hash: the log hash from the commit start node up to the latest reference
+ * node.
*
* @empty: %1 if the UBI device is empty
* @need_recovery: %1 if the file-system needs recovery
@@ -1478,6 +1484,8 @@ struct ubifs_info {
char *auth_hash_name;
enum hash_algo auth_hash_algo;
+ struct shash_desc *log_hash;
+
/* The below fields are used only during mounting and re-mounting */
unsigned int empty:1;
unsigned int need_recovery:1;
generated by cgit v1.2.3 (git 2.39.1) at 2024-05-22 11:22:31 +0000