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-rw-r--r--module/zfs/arc.c10
-rw-r--r--module/zfs/dbuf.c137
-rw-r--r--module/zfs/dnode_sync.c7
3 files changed, 116 insertions, 38 deletions
diff --git a/module/zfs/arc.c b/module/zfs/arc.c
index bf514f00f..ab2564841 100644
--- a/module/zfs/arc.c
+++ b/module/zfs/arc.c
@@ -2137,13 +2137,17 @@ arc_buf_fill(arc_buf_t *buf, spa_t *spa, const zbookmark_phys_t *zb,
}
/*
- * Adjust encrypted and authenticated headers to accomodate the
- * request if needed.
+ * Adjust encrypted and authenticated headers to accomodate
+ * the request if needed. Dnode blocks (ARC_FILL_IN_PLACE) are
+ * allowed to fail decryption due to keys not being loaded
+ * without being marked as an IO error.
*/
if (HDR_PROTECTED(hdr)) {
error = arc_fill_hdr_crypt(hdr, hash_lock, spa,
zb, !!(flags & ARC_FILL_NOAUTH));
- if (error != 0) {
+ if (error == EACCES && (flags & ARC_FILL_IN_PLACE) != 0) {
+ return (error);
+ } else if (error != 0) {
if (hash_lock != NULL)
mutex_enter(hash_lock);
arc_hdr_set_flags(hdr, ARC_FLAG_IO_ERROR);
diff --git a/module/zfs/dbuf.c b/module/zfs/dbuf.c
index e3738db52..0a8e6d08b 100644
--- a/module/zfs/dbuf.c
+++ b/module/zfs/dbuf.c
@@ -1119,6 +1119,64 @@ dbuf_read_done(zio_t *zio, const zbookmark_phys_t *zb, const blkptr_t *bp,
dbuf_rele_and_unlock(db, NULL, B_FALSE);
}
+
+/*
+ * This function ensures that, when doing a decrypting read of a block,
+ * we make sure we have decrypted the dnode associated with it. We must do
+ * this so that we ensure we are fully authenticating the checksum-of-MACs
+ * tree from the root of the objset down to this block. Indirect blocks are
+ * always verified against their secure checksum-of-MACs assuming that the
+ * dnode containing them is correct. Now that we are doing a decrypting read,
+ * we can be sure that the key is loaded and verify that assumption. This is
+ * especially important considering that we always read encrypted dnode
+ * blocks as raw data (without verifying their MACs) to start, and
+ * decrypt / authenticate them when we need to read an encrypted bonus buffer.
+ */
+static int
+dbuf_read_verify_dnode_crypt(dmu_buf_impl_t *db, uint32_t flags)
+{
+ int err = 0;
+ objset_t *os = db->db_objset;
+ arc_buf_t *dnode_abuf;
+ dnode_t *dn;
+ zbookmark_phys_t zb;
+
+ ASSERT(MUTEX_HELD(&db->db_mtx));
+
+ if (!os->os_encrypted || os->os_raw_receive ||
+ (flags & DB_RF_NO_DECRYPT) != 0)
+ return (0);
+
+ DB_DNODE_ENTER(db);
+ dn = DB_DNODE(db);
+ dnode_abuf = (dn->dn_dbuf != NULL) ? dn->dn_dbuf->db_buf : NULL;
+
+ if (dnode_abuf == NULL || !arc_is_encrypted(dnode_abuf)) {
+ DB_DNODE_EXIT(db);
+ return (0);
+ }
+
+ SET_BOOKMARK(&zb, dmu_objset_id(os),
+ DMU_META_DNODE_OBJECT, 0, dn->dn_dbuf->db_blkid);
+ err = arc_untransform(dnode_abuf, os->os_spa, &zb, B_TRUE);
+
+ /*
+ * An error code of EACCES tells us that the key is still not
+ * available. This is ok if we are only reading authenticated
+ * (and therefore non-encrypted) blocks.
+ */
+ if (err == EACCES && ((db->db_blkid != DMU_BONUS_BLKID &&
+ !DMU_OT_IS_ENCRYPTED(dn->dn_type)) ||
+ (db->db_blkid == DMU_BONUS_BLKID &&
+ !DMU_OT_IS_ENCRYPTED(dn->dn_bonustype))))
+ err = 0;
+
+
+ DB_DNODE_EXIT(db);
+
+ return (err);
+}
+
static int
dbuf_read_impl(dmu_buf_impl_t *db, zio_t *zio, uint32_t flags)
{
@@ -1143,23 +1201,13 @@ dbuf_read_impl(dmu_buf_impl_t *db, zio_t *zio, uint32_t flags)
*/
int bonuslen = MIN(dn->dn_bonuslen, dn->dn_phys->dn_bonuslen);
int max_bonuslen = DN_SLOTS_TO_BONUSLEN(dn->dn_num_slots);
- arc_buf_t *dn_buf = (dn->dn_dbuf != NULL) ?
- dn->dn_dbuf->db_buf : NULL;
/* if the underlying dnode block is encrypted, decrypt it */
- if (dn_buf != NULL && dn->dn_objset->os_encrypted &&
- DMU_OT_IS_ENCRYPTED(dn->dn_bonustype) &&
- (flags & DB_RF_NO_DECRYPT) == 0 &&
- arc_is_encrypted(dn_buf)) {
- SET_BOOKMARK(&zb, dmu_objset_id(db->db_objset),
- DMU_META_DNODE_OBJECT, 0, dn->dn_dbuf->db_blkid);
- err = arc_untransform(dn_buf, dn->dn_objset->os_spa,
- &zb, B_TRUE);
- if (err != 0) {
- DB_DNODE_EXIT(db);
- mutex_exit(&db->db_mtx);
- return (err);
- }
+ err = dbuf_read_verify_dnode_crypt(db, flags);
+ if (err != 0) {
+ DB_DNODE_EXIT(db);
+ mutex_exit(&db->db_mtx);
+ return (err);
}
ASSERT3U(bonuslen, <=, db->db.db_size);
@@ -1215,17 +1263,6 @@ dbuf_read_impl(dmu_buf_impl_t *db, zio_t *zio, uint32_t flags)
return (0);
}
- DB_DNODE_EXIT(db);
-
- db->db_state = DB_READ;
- mutex_exit(&db->db_mtx);
-
- if (DBUF_IS_L2CACHEABLE(db))
- aflags |= ARC_FLAG_L2CACHE;
-
- SET_BOOKMARK(&zb, dmu_objset_id(db->db_objset),
- db->db.db_object, db->db_level, db->db_blkid);
-
/*
* All bps of an encrypted os should have the encryption bit set.
* If this is not true it indicates tampering and we report an error.
@@ -1234,11 +1271,31 @@ dbuf_read_impl(dmu_buf_impl_t *db, zio_t *zio, uint32_t flags)
spa_log_error(db->db_objset->os_spa, &zb);
zfs_panic_recover("unencrypted block in encrypted "
"object set %llu", dmu_objset_id(db->db_objset));
+ DB_DNODE_EXIT(db);
+ mutex_exit(&db->db_mtx);
return (SET_ERROR(EIO));
}
+ err = dbuf_read_verify_dnode_crypt(db, flags);
+ if (err != 0) {
+ DB_DNODE_EXIT(db);
+ mutex_exit(&db->db_mtx);
+ return (err);
+ }
+
+ DB_DNODE_EXIT(db);
+
+ db->db_state = DB_READ;
+ mutex_exit(&db->db_mtx);
+
+ if (DBUF_IS_L2CACHEABLE(db))
+ aflags |= ARC_FLAG_L2CACHE;
+
dbuf_add_ref(db, NULL);
+ SET_BOOKMARK(&zb, dmu_objset_id(db->db_objset),
+ db->db.db_object, db->db_level, db->db_blkid);
+
zio_flags = (flags & DB_RF_CANFAIL) ?
ZIO_FLAG_CANFAIL : ZIO_FLAG_MUSTSUCCEED;
@@ -1358,14 +1415,22 @@ dbuf_read(dmu_buf_impl_t *db, zio_t *zio, uint32_t flags)
spa_t *spa = dn->dn_objset->os_spa;
/*
- * If the arc buf is compressed or encrypted, we need to
- * untransform it to read the data. This could happen during
- * the "zfs receive" of a stream which is deduplicated and
- * either raw or compressed. We do not need to do this if the
- * caller wants raw encrypted data.
+ * Ensure that this block's dnode has been decrypted if
+ * the caller has requested decrypted data.
*/
- if (db->db_buf != NULL && (flags & DB_RF_NO_DECRYPT) == 0 &&
+ err = dbuf_read_verify_dnode_crypt(db, flags);
+
+ /*
+ * If the arc buf is compressed or encrypted and the caller
+ * requested uncompressed data, we need to untransform it
+ * before returning. We also call arc_untransform() on any
+ * unauthenticated blocks, which will verify their MAC if
+ * the key is now available.
+ */
+ if (err == 0 && db->db_buf != NULL &&
+ (flags & DB_RF_NO_DECRYPT) == 0 &&
(arc_is_encrypted(db->db_buf) ||
+ arc_is_unauthenticated(db->db_buf) ||
arc_get_compression(db->db_buf) != ZIO_COMPRESS_OFF)) {
zbookmark_phys_t zb;
@@ -1376,7 +1441,7 @@ dbuf_read(dmu_buf_impl_t *db, zio_t *zio, uint32_t flags)
dbuf_set_data(db, db->db_buf);
}
mutex_exit(&db->db_mtx);
- if (prefetch)
+ if (err == 0 && prefetch)
dmu_zfetch(&dn->dn_zfetch, db->db_blkid, 1, B_TRUE);
if ((flags & DB_RF_HAVESTRUCT) == 0)
rw_exit(&dn->dn_struct_rwlock);
@@ -1943,6 +2008,8 @@ dbuf_dirty(dmu_buf_impl_t *db, dmu_tx_t *tx)
ddt_prefetch(os->os_spa, db->db_blkptr);
if (db->db_level == 0) {
+ ASSERT(!db->db_objset->os_raw_receive ||
+ dn->dn_maxblkid >= db->db_blkid);
dnode_new_blkid(dn, db->db_blkid, tx, drop_struct_lock);
ASSERT(dn->dn_maxblkid >= db->db_blkid);
}
@@ -3806,8 +3873,10 @@ dbuf_write_ready(zio_t *zio, arc_buf_t *buf, void *vdb)
if (db->db_level == 0) {
mutex_enter(&dn->dn_mtx);
if (db->db_blkid > dn->dn_phys->dn_maxblkid &&
- db->db_blkid != DMU_SPILL_BLKID)
+ db->db_blkid != DMU_SPILL_BLKID) {
+ ASSERT0(db->db_objset->os_raw_receive);
dn->dn_phys->dn_maxblkid = db->db_blkid;
+ }
mutex_exit(&dn->dn_mtx);
if (dn->dn_type == DMU_OT_DNODE) {
diff --git a/module/zfs/dnode_sync.c b/module/zfs/dnode_sync.c
index 044031e4f..830da26f8 100644
--- a/module/zfs/dnode_sync.c
+++ b/module/zfs/dnode_sync.c
@@ -367,7 +367,12 @@ dnode_sync_free_range_impl(dnode_t *dn, uint64_t blkid, uint64_t nblks,
}
}
- if (trunc) {
+ /*
+ * Do not truncate the maxblkid if we are performing a raw
+ * receive. The raw receive sets the mablkid manually and
+ * must not be overriden.
+ */
+ if (trunc && !dn->dn_objset->os_raw_receive) {
ASSERTV(uint64_t off);
dn->dn_phys->dn_maxblkid = blkid == 0 ? 0 : blkid - 1;
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-18 07:45:08 +0000