Skip to content

Commit

Permalink
Consolidate arc_buf allocation checks
Browse files Browse the repository at this point in the history 
The following check currently occurs in three separate locations
in dbuf.c.  This change consolidates those checks in to the
dbuf_alloc_arcbuf_from_arcbuf() function.

if (arc_is_encrypted(data)) {
...
} else if (compress_type != ZIO_COMPRESS_OFF) {
...
} else {
...
}

Reviewed-by: Brian Behlendorf <[email protected]>
Signed-off-by: Matt Macy <[email protected]>
Closes openzfs#10057
  • Loading branch information
@mattmacy
mattmacy authored Feb 28, 2020
1 parent 3d5ba1c commit 13fac09
Showing 1 changed file with 42 additions and 72 deletions.
114 changes: 42 additions & 72 deletions module/zfs/dbuf.c
View file
Original file line number Diff line number Diff line change
Expand Up @@ -1086,6 +1086,40 @@ dbuf_set_data(dmu_buf_impl_t *db, arc_buf_t *buf)
db->db.db_data = buf->b_data;
}

static arc_buf_t *
dbuf_alloc_arcbuf_from_arcbuf(dmu_buf_impl_t *db, arc_buf_t *data)
{
objset_t *os = db->db_objset;
spa_t *spa = os->os_spa;
arc_buf_contents_t type = DBUF_GET_BUFC_TYPE(db);
enum zio_compress compress_type;
int psize, lsize;

psize = arc_buf_size(data);
lsize = arc_buf_lsize(data);
compress_type = arc_get_compression(data);

if (arc_is_encrypted(data)) {
boolean_t byteorder;
uint8_t salt[ZIO_DATA_SALT_LEN];
uint8_t iv[ZIO_DATA_IV_LEN];
uint8_t mac[ZIO_DATA_MAC_LEN];
dnode_t *dn = DB_DNODE(db);

arc_get_raw_params(data, &byteorder, salt, iv, mac);
data = arc_alloc_raw_buf(spa, db, dmu_objset_id(os),
byteorder, salt, iv, mac, dn->dn_type, psize, lsize,
compress_type);
} else if (compress_type != ZIO_COMPRESS_OFF) {
ASSERT3U(type, ==, ARC_BUFC_DATA);
data = arc_alloc_compressed_buf(spa, db,
psize, lsize, compress_type);
} else {
data = arc_alloc_buf(spa, db, type, psize);
}
return (data);
}

static arc_buf_t *
dbuf_alloc_arcbuf(dmu_buf_impl_t *db)
{
Expand Down Expand Up @@ -1535,33 +1569,9 @@ dbuf_fix_old_data(dmu_buf_impl_t *db, uint64_t txg)
arc_space_consume(bonuslen, ARC_SPACE_BONUS);
bcopy(db->db.db_data, dr->dt.dl.dr_data, bonuslen);
} else if (zfs_refcount_count(&db->db_holds) > db->db_dirtycnt) {
dnode_t *dn = DB_DNODE(db);
int size = arc_buf_size(db->db_buf);
arc_buf_contents_t type = DBUF_GET_BUFC_TYPE(db);
spa_t *spa = db->db_objset->os_spa;
enum zio_compress compress_type =
arc_get_compression(db->db_buf);

if (arc_is_encrypted(db->db_buf)) {
boolean_t byteorder;
uint8_t salt[ZIO_DATA_SALT_LEN];
uint8_t iv[ZIO_DATA_IV_LEN];
uint8_t mac[ZIO_DATA_MAC_LEN];

arc_get_raw_params(db->db_buf, &byteorder, salt,
iv, mac);
dr->dt.dl.dr_data = arc_alloc_raw_buf(spa, db,
dmu_objset_id(dn->dn_objset), byteorder, salt, iv,
mac, dn->dn_type, size, arc_buf_lsize(db->db_buf),
compress_type);
} else if (compress_type != ZIO_COMPRESS_OFF) {
ASSERT3U(type, ==, ARC_BUFC_DATA);
dr->dt.dl.dr_data = arc_alloc_compressed_buf(spa, db,
size, arc_buf_lsize(db->db_buf), compress_type);
} else {
dr->dt.dl.dr_data = arc_alloc_buf(spa, db, type, size);
}
bcopy(db->db.db_data, dr->dt.dl.dr_data->b_data, size);
arc_buf_t *buf = dbuf_alloc_arcbuf_from_arcbuf(db, db->db_buf);
dr->dt.dl.dr_data = buf;
bcopy(db->db.db_data, buf->b_data, arc_buf_size(buf));
} else {
db->db_buf = NULL;
dbuf_clear_data(db);
Expand Down Expand Up @@ -3264,29 +3274,10 @@ noinline static void
dbuf_hold_copy(dnode_t *dn, dmu_buf_impl_t *db)
{
dbuf_dirty_record_t *dr = db->db_data_pending;
arc_buf_t *data = dr->dt.dl.dr_data;
enum zio_compress compress_type = arc_get_compression(data);

if (arc_is_encrypted(data)) {
boolean_t byteorder;
uint8_t salt[ZIO_DATA_SALT_LEN];
uint8_t iv[ZIO_DATA_IV_LEN];
uint8_t mac[ZIO_DATA_MAC_LEN];

arc_get_raw_params(data, &byteorder, salt, iv, mac);
dbuf_set_data(db, arc_alloc_raw_buf(dn->dn_objset->os_spa, db,
dmu_objset_id(dn->dn_objset), byteorder, salt, iv, mac,
dn->dn_type, arc_buf_size(data), arc_buf_lsize(data),
compress_type));
} else if (compress_type != ZIO_COMPRESS_OFF) {
dbuf_set_data(db, arc_alloc_compressed_buf(
dn->dn_objset->os_spa, db, arc_buf_size(data),
arc_buf_lsize(data), compress_type));
} else {
dbuf_set_data(db, arc_alloc_buf(dn->dn_objset->os_spa, db,
DBUF_GET_BUFC_TYPE(db), db->db.db_size));
}
arc_buf_t *newdata, *data = dr->dt.dl.dr_data;

newdata = dbuf_alloc_arcbuf_from_arcbuf(db, data);
dbuf_set_data(db, newdata);
rw_enter(&db->db_rwlock, RW_WRITER);
bcopy(data->b_data, db->db.db_data, arc_buf_size(data));
rw_exit(&db->db_rwlock);
Expand Down Expand Up @@ -4070,29 +4061,8 @@ dbuf_sync_leaf(dbuf_dirty_record_t *dr, dmu_tx_t *tx)
* objects only modified in the syncing context (e.g.
* DNONE_DNODE blocks).
*/
int psize = arc_buf_size(*datap);
int lsize = arc_buf_lsize(*datap);
arc_buf_contents_t type = DBUF_GET_BUFC_TYPE(db);
enum zio_compress compress_type = arc_get_compression(*datap);

if (arc_is_encrypted(*datap)) {
boolean_t byteorder;
uint8_t salt[ZIO_DATA_SALT_LEN];
uint8_t iv[ZIO_DATA_IV_LEN];
uint8_t mac[ZIO_DATA_MAC_LEN];

arc_get_raw_params(*datap, &byteorder, salt, iv, mac);
*datap = arc_alloc_raw_buf(os->os_spa, db,
dmu_objset_id(os), byteorder, salt, iv, mac,
dn->dn_type, psize, lsize, compress_type);
} else if (compress_type != ZIO_COMPRESS_OFF) {
ASSERT3U(type, ==, ARC_BUFC_DATA);
*datap = arc_alloc_compressed_buf(os->os_spa, db,
psize, lsize, compress_type);
} else {
*datap = arc_alloc_buf(os->os_spa, db, type, psize);
}
bcopy(db->db.db_data, (*datap)->b_data, psize);
*datap = dbuf_alloc_arcbuf_from_arcbuf(db, db->db_buf);
bcopy(db->db.db_data, (*datap)->b_data, arc_buf_size(*datap));
}
db->db_data_pending = dr;

Expand Down

0 comments on commit 13fac09

Please sign in to comment.