* CDDL HEADER END
*/
/*
- * Copyright 2009 Sun Microsystems, Inc. All rights reserved.
- * Use is subject to license terms.
+ * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
*/
#include <sys/dmu.h>
#include <sys/zfs_ioctl.h>
#include <sys/zap.h>
#include <sys/zio_checksum.h>
+#include <sys/sa.h>
#ifdef _KERNEL
#include <sys/vmsystm.h>
#include <sys/zfs_znode.h>
{ byteswap_uint64_array, TRUE, "object array" },
{ byteswap_uint8_array, TRUE, "packed nvlist" },
{ byteswap_uint64_array, TRUE, "packed nvlist size" },
- { byteswap_uint64_array, TRUE, "bplist" },
- { byteswap_uint64_array, TRUE, "bplist header" },
+ { byteswap_uint64_array, TRUE, "bpobj" },
+ { byteswap_uint64_array, TRUE, "bpobj header" },
{ byteswap_uint64_array, TRUE, "SPA space map header" },
{ byteswap_uint64_array, TRUE, "SPA space map" },
{ byteswap_uint64_array, TRUE, "ZIL intent log" },
{ byteswap_uint8_array, TRUE, "FUID table" },
{ byteswap_uint64_array, TRUE, "FUID table size" },
{ zap_byteswap, TRUE, "DSL dataset next clones"},
- { zap_byteswap, TRUE, "scrub work queue" },
+ { zap_byteswap, TRUE, "scan work queue" },
{ zap_byteswap, TRUE, "ZFS user/group used" },
{ zap_byteswap, TRUE, "ZFS user/group quota" },
{ zap_byteswap, TRUE, "snapshot refcount tags"},
+ { zap_byteswap, TRUE, "DDT ZAP algorithm" },
+ { zap_byteswap, TRUE, "DDT statistics" },
+ { byteswap_uint8_array, TRUE, "System attributes" },
+ { zap_byteswap, TRUE, "SA master node" },
+ { zap_byteswap, TRUE, "SA attr registration" },
+ { zap_byteswap, TRUE, "SA attr layouts" },
+ { zap_byteswap, TRUE, "scan translations" },
+ { byteswap_uint8_array, FALSE, "deduplicated block" },
+ { zap_byteswap, TRUE, "DSL deadlist map" },
+ { byteswap_uint64_array, TRUE, "DSL deadlist map hdr" },
+ { zap_byteswap, TRUE, "DSL dir clones" },
+ { byteswap_uint64_array, TRUE, "bpobj subobj" },
};
int
dmu_buf_hold(objset_t *os, uint64_t object, uint64_t offset,
- void *tag, dmu_buf_t **dbp)
+ void *tag, dmu_buf_t **dbp, int flags)
{
dnode_t *dn;
uint64_t blkid;
dmu_buf_impl_t *db;
int err;
+ int db_flags = DB_RF_CANFAIL;
- err = dnode_hold(os->os, object, FTAG, &dn);
+ if (flags & DMU_READ_NO_PREFETCH)
+ db_flags |= DB_RF_NOPREFETCH;
+
+ err = dnode_hold(os, object, FTAG, &dn);
if (err)
return (err);
blkid = dbuf_whichblock(dn, offset);
if (db == NULL) {
err = EIO;
} else {
- err = dbuf_read(db, NULL, DB_RF_CANFAIL);
+ err = dbuf_read(db, NULL, db_flags);
if (err) {
dbuf_rele(db, tag);
db = NULL;
return (0);
}
+int
+dmu_set_bonustype(dmu_buf_t *db, dmu_object_type_t type, dmu_tx_t *tx)
+{
+ dnode_t *dn = ((dmu_buf_impl_t *)db)->db_dnode;
+
+ if (type > DMU_OT_NUMTYPES)
+ return (EINVAL);
+
+ if (dn->dn_bonus != (dmu_buf_impl_t *)db)
+ return (EINVAL);
+
+ dnode_setbonus_type(dn, type, tx);
+ return (0);
+}
+
+int
+dmu_rm_spill(objset_t *os, uint64_t object, dmu_tx_t *tx)
+{
+ dnode_t *dn;
+ int error;
+
+ error = dnode_hold(os, object, FTAG, &dn);
+ dbuf_rm_spill(dn, tx);
+ rw_enter(&dn->dn_struct_rwlock, RW_WRITER);
+ dnode_rm_spill(dn, tx);
+ rw_exit(&dn->dn_struct_rwlock);
+ dnode_rele(dn, FTAG);
+ return (error);
+}
+
/*
* returns ENOENT, EIO, or 0.
*/
dmu_buf_impl_t *db;
int error;
- error = dnode_hold(os->os, object, FTAG, &dn);
+ error = dnode_hold(os, object, FTAG, &dn);
if (error)
return (error);
dnode_rele(dn, FTAG);
- VERIFY(0 == dbuf_read(db, NULL, DB_RF_MUST_SUCCEED));
+ VERIFY(0 == dbuf_read(db, NULL, DB_RF_MUST_SUCCEED | DB_RF_NOPREFETCH));
*dbp = &db->db;
return (0);
}
/*
+ * returns ENOENT, EIO, or 0.
+ *
+ * This interface will allocate a blank spill dbuf when a spill blk
+ * doesn't already exist on the dnode.
+ *
+ * if you only want to find an already existing spill db, then
+ * dmu_spill_hold_existing() should be used.
+ */
+int
+dmu_spill_hold_by_dnode(dnode_t *dn, uint32_t flags, void *tag, dmu_buf_t **dbp)
+{
+ dmu_buf_impl_t *db = NULL;
+ int err;
+
+ if ((flags & DB_RF_HAVESTRUCT) == 0)
+ rw_enter(&dn->dn_struct_rwlock, RW_READER);
+
+ db = dbuf_hold(dn, DMU_SPILL_BLKID, tag);
+
+ if ((flags & DB_RF_HAVESTRUCT) == 0)
+ rw_exit(&dn->dn_struct_rwlock);
+
+ ASSERT(db != NULL);
+ err = dbuf_read(db, NULL, DB_RF_MUST_SUCCEED | flags);
+ *dbp = &db->db;
+ return (err);
+}
+
+int
+dmu_spill_hold_existing(dmu_buf_t *bonus, void *tag, dmu_buf_t **dbp)
+{
+ dnode_t *dn = ((dmu_buf_impl_t *)bonus)->db_dnode;
+ int err;
+
+ if (spa_version(dn->dn_objset->os_spa) < SPA_VERSION_SA)
+ return (EINVAL);
+ rw_enter(&dn->dn_struct_rwlock, RW_READER);
+
+ if (!dn->dn_have_spill) {
+ rw_exit(&dn->dn_struct_rwlock);
+ return (ENOENT);
+ }
+ err = dmu_spill_hold_by_dnode(dn, DB_RF_HAVESTRUCT, tag, dbp);
+ rw_exit(&dn->dn_struct_rwlock);
+ return (err);
+}
+
+int
+dmu_spill_hold_by_bonus(dmu_buf_t *bonus, void *tag, dmu_buf_t **dbp)
+{
+ return (dmu_spill_hold_by_dnode(((dmu_buf_impl_t *)bonus)->db_dnode,
+ 0, tag, dbp));
+}
+
+/*
* Note: longer-term, we should modify all of the dmu_buf_*() interfaces
* to take a held dnode rather than <os, object> -- the lookup is wasteful,
* and can induce severe lock contention when writing to several files
dnode_t *dn;
int err;
- err = dnode_hold(os->os, object, FTAG, &dn);
+ err = dnode_hold(os, object, FTAG, &dn);
if (err)
return (err);
return;
if (len == 0) { /* they're interested in the bonus buffer */
- dn = os->os->os_meta_dnode;
+ dn = os->os_meta_dnode;
if (object == 0 || object >= DN_MAX_OBJECT)
return;
* already cached, we will do a *synchronous* read in the
* dnode_hold() call. The same is true for any indirects.
*/
- err = dnode_hold(os->os, object, FTAG, &dn);
+ err = dnode_hold(os, object, FTAG, &dn);
if (err != 0)
return;
dnode_t *dn;
int err;
- err = dnode_hold(os->os, object, FTAG, &dn);
+ err = dnode_hold(os, object, FTAG, &dn);
if (err != 0)
return (err);
err = dmu_free_long_range_impl(os, dn, offset, length, FALSE);
dmu_tx_t *tx;
int err;
- err = dnode_hold_impl(os->os, object, DNODE_MUST_BE_ALLOCATED,
+ err = dnode_hold_impl(os, object, DNODE_MUST_BE_ALLOCATED,
FTAG, &dn);
if (err != 0)
return (err);
uint64_t size, dmu_tx_t *tx)
{
dnode_t *dn;
- int err = dnode_hold(os->os, object, FTAG, &dn);
+ int err = dnode_hold(os, object, FTAG, &dn);
if (err)
return (err);
ASSERT(offset < UINT64_MAX);
dmu_buf_t **dbp;
int numbufs, err;
- err = dnode_hold(os->os, object, FTAG, &dn);
+ err = dnode_hold(os, object, FTAG, &dn);
if (err)
return (err);
dmu_buf_rele_array(dbp, numbufs, FTAG);
}
+/*
+ * DMU support for xuio
+ */
+kstat_t *xuio_ksp = NULL;
+
+int
+dmu_xuio_init(xuio_t *xuio, int nblk)
+{
+ dmu_xuio_t *priv;
+ uio_t *uio = &xuio->xu_uio;
+
+ uio->uio_iovcnt = nblk;
+ uio->uio_iov = kmem_zalloc(nblk * sizeof (iovec_t), KM_SLEEP);
+
+ priv = kmem_zalloc(sizeof (dmu_xuio_t), KM_SLEEP);
+ priv->cnt = nblk;
+ priv->bufs = kmem_zalloc(nblk * sizeof (arc_buf_t *), KM_SLEEP);
+ priv->iovp = uio->uio_iov;
+ XUIO_XUZC_PRIV(xuio) = priv;
+
+ if (XUIO_XUZC_RW(xuio) == UIO_READ)
+ XUIOSTAT_INCR(xuiostat_onloan_rbuf, nblk);
+ else
+ XUIOSTAT_INCR(xuiostat_onloan_wbuf, nblk);
+
+ return (0);
+}
+
+void
+dmu_xuio_fini(xuio_t *xuio)
+{
+ dmu_xuio_t *priv = XUIO_XUZC_PRIV(xuio);
+ int nblk = priv->cnt;
+
+ kmem_free(priv->iovp, nblk * sizeof (iovec_t));
+ kmem_free(priv->bufs, nblk * sizeof (arc_buf_t *));
+ kmem_free(priv, sizeof (dmu_xuio_t));
+
+ if (XUIO_XUZC_RW(xuio) == UIO_READ)
+ XUIOSTAT_INCR(xuiostat_onloan_rbuf, -nblk);
+ else
+ XUIOSTAT_INCR(xuiostat_onloan_wbuf, -nblk);
+}
+
+/*
+ * Initialize iov[priv->next] and priv->bufs[priv->next] with { off, n, abuf }
+ * and increase priv->next by 1.
+ */
+int
+dmu_xuio_add(xuio_t *xuio, arc_buf_t *abuf, offset_t off, size_t n)
+{
+ struct iovec *iov;
+ uio_t *uio = &xuio->xu_uio;
+ dmu_xuio_t *priv = XUIO_XUZC_PRIV(xuio);
+ int i = priv->next++;
+
+ ASSERT(i < priv->cnt);
+ ASSERT(off + n <= arc_buf_size(abuf));
+ iov = uio->uio_iov + i;
+ iov->iov_base = (char *)abuf->b_data + off;
+ iov->iov_len = n;
+ priv->bufs[i] = abuf;
+ return (0);
+}
+
+int
+dmu_xuio_cnt(xuio_t *xuio)
+{
+ dmu_xuio_t *priv = XUIO_XUZC_PRIV(xuio);
+ return (priv->cnt);
+}
+
+arc_buf_t *
+dmu_xuio_arcbuf(xuio_t *xuio, int i)
+{
+ dmu_xuio_t *priv = XUIO_XUZC_PRIV(xuio);
+
+ ASSERT(i < priv->cnt);
+ return (priv->bufs[i]);
+}
+
+void
+dmu_xuio_clear(xuio_t *xuio, int i)
+{
+ dmu_xuio_t *priv = XUIO_XUZC_PRIV(xuio);
+
+ ASSERT(i < priv->cnt);
+ priv->bufs[i] = NULL;
+}
+
+static void
+xuio_stat_init(void)
+{
+ xuio_ksp = kstat_create("zfs", 0, "xuio_stats", "misc",
+ KSTAT_TYPE_NAMED, sizeof (xuio_stats) / sizeof (kstat_named_t),
+ KSTAT_FLAG_VIRTUAL);
+ if (xuio_ksp != NULL) {
+ xuio_ksp->ks_data = &xuio_stats;
+ kstat_install(xuio_ksp);
+ }
+}
+
+static void
+xuio_stat_fini(void)
+{
+ if (xuio_ksp != NULL) {
+ kstat_delete(xuio_ksp);
+ xuio_ksp = NULL;
+ }
+}
+
+void
+xuio_stat_wbuf_copied()
+{
+ XUIOSTAT_BUMP(xuiostat_wbuf_copied);
+}
+
+void
+xuio_stat_wbuf_nocopy()
+{
+ XUIOSTAT_BUMP(xuiostat_wbuf_nocopy);
+}
+
#ifdef _KERNEL
int
dmu_read_uio(objset_t *os, uint64_t object, uio_t *uio, uint64_t size)
{
dmu_buf_t **dbp;
int numbufs, i, err;
+ xuio_t *xuio = NULL;
/*
* NB: we could do this block-at-a-time, but it's nice
if (err)
return (err);
+ if (uio->uio_extflg == UIO_XUIO)
+ xuio = (xuio_t *)uio;
+
for (i = 0; i < numbufs; i++) {
int tocpy;
int bufoff;
bufoff = uio->uio_loffset - db->db_offset;
tocpy = (int)MIN(db->db_size - bufoff, size);
- err = uiomove((char *)db->db_data + bufoff, tocpy,
- UIO_READ, uio);
+ if (xuio) {
+ dmu_buf_impl_t *dbi = (dmu_buf_impl_t *)db;
+ arc_buf_t *dbuf_abuf = dbi->db_buf;
+ arc_buf_t *abuf = dbuf_loan_arcbuf(dbi);
+ err = dmu_xuio_add(xuio, abuf, bufoff, tocpy);
+ if (!err) {
+ uio->uio_resid -= tocpy;
+ uio->uio_loffset += tocpy;
+ }
+
+ if (abuf == dbuf_abuf)
+ XUIOSTAT_BUMP(xuiostat_rbuf_nocopy);
+ else
+ XUIOSTAT_BUMP(xuiostat_rbuf_copied);
+ } else {
+ err = uiomove((char *)db->db_data + bufoff, tocpy,
+ UIO_READ, uio);
+ }
if (err)
break;
return (err);
}
-int
-dmu_write_uio(objset_t *os, uint64_t object, uio_t *uio, uint64_t size,
- dmu_tx_t *tx)
+static int
+dmu_write_uio_dnode(dnode_t *dn, uio_t *uio, uint64_t size, dmu_tx_t *tx)
{
dmu_buf_t **dbp;
- int numbufs, i;
+ int numbufs;
int err = 0;
+ int i;
- if (size == 0)
- return (0);
-
- err = dmu_buf_hold_array(os, object, uio->uio_loffset, size,
- FALSE, FTAG, &numbufs, &dbp);
+ err = dmu_buf_hold_array_by_dnode(dn, uio->uio_loffset, size,
+ FALSE, FTAG, &numbufs, &dbp, DMU_READ_PREFETCH);
if (err)
return (err);
size -= tocpy;
}
+
dmu_buf_rele_array(dbp, numbufs, FTAG);
return (err);
}
int
+dmu_write_uio_dbuf(dmu_buf_t *zdb, uio_t *uio, uint64_t size,
+ dmu_tx_t *tx)
+{
+ if (size == 0)
+ return (0);
+
+ return (dmu_write_uio_dnode(((dmu_buf_impl_t *)zdb)->db_dnode,
+ uio, size, tx));
+}
+
+int
+dmu_write_uio(objset_t *os, uint64_t object, uio_t *uio, uint64_t size,
+ dmu_tx_t *tx)
+{
+ dnode_t *dn;
+ int err;
+
+ if (size == 0)
+ return (0);
+
+ err = dnode_hold(os, object, FTAG, &dn);
+ if (err)
+ return (err);
+
+ err = dmu_write_uio_dnode(dn, uio, size, tx);
+
+ dnode_rele(dn, FTAG);
+
+ return (err);
+}
+
+int
dmu_write_pages(objset_t *os, uint64_t object, uint64_t offset, uint64_t size,
page_t *pp, dmu_tx_t *tx)
{
dbuf_rele(db, FTAG);
} else {
dbuf_rele(db, FTAG);
- ASSERT(dn->dn_objset->os.os == dn->dn_objset);
- dmu_write(&dn->dn_objset->os, dn->dn_object, offset, blksz,
+ dmu_write(dn->dn_objset, dn->dn_object, offset, blksz,
buf->b_data, tx);
dmu_return_arcbuf(buf);
+ XUIOSTAT_BUMP(xuiostat_wbuf_copied);
}
}
typedef struct {
- dbuf_dirty_record_t *dr;
- dmu_sync_cb_t *done;
- void *arg;
+ dbuf_dirty_record_t *dsa_dr;
+ dmu_sync_cb_t *dsa_done;
+ zgd_t *dsa_zgd;
+ dmu_tx_t *dsa_tx;
} dmu_sync_arg_t;
/* ARGSUSED */
static void
dmu_sync_ready(zio_t *zio, arc_buf_t *buf, void *varg)
{
+ dmu_sync_arg_t *dsa = varg;
+ dmu_buf_t *db = dsa->dsa_zgd->zgd_db;
+ dnode_t *dn = ((dmu_buf_impl_t *)db)->db_dnode;
blkptr_t *bp = zio->io_bp;
- if (!BP_IS_HOLE(bp)) {
- dmu_sync_arg_t *in = varg;
- dbuf_dirty_record_t *dr = in->dr;
- dmu_buf_impl_t *db = dr->dr_dbuf;
- ASSERT(BP_GET_TYPE(bp) == db->db_dnode->dn_type);
- ASSERT(BP_GET_LEVEL(bp) == 0);
- bp->blk_fill = 1;
+ if (zio->io_error == 0) {
+ if (BP_IS_HOLE(bp)) {
+ /*
+ * A block of zeros may compress to a hole, but the
+ * block size still needs to be known for replay.
+ */
+ BP_SET_LSIZE(bp, db->db_size);
+ } else {
+ ASSERT(BP_GET_TYPE(bp) == dn->dn_type);
+ ASSERT(BP_GET_LEVEL(bp) == 0);
+ bp->blk_fill = 1;
+ }
}
}
+static void
+dmu_sync_late_arrival_ready(zio_t *zio)
+{
+ dmu_sync_ready(zio, NULL, zio->io_private);
+}
+
/* ARGSUSED */
static void
dmu_sync_done(zio_t *zio, arc_buf_t *buf, void *varg)
{
- dmu_sync_arg_t *in = varg;
- dbuf_dirty_record_t *dr = in->dr;
+ dmu_sync_arg_t *dsa = varg;
+ dbuf_dirty_record_t *dr = dsa->dsa_dr;
dmu_buf_impl_t *db = dr->dr_dbuf;
- dmu_sync_cb_t *done = in->done;
mutex_enter(&db->db_mtx);
ASSERT(dr->dt.dl.dr_override_state == DR_IN_DMU_SYNC);
- dr->dt.dl.dr_overridden_by = *zio->io_bp; /* structure assignment */
- dr->dt.dl.dr_override_state = DR_OVERRIDDEN;
+ if (zio->io_error == 0) {
+ dr->dt.dl.dr_overridden_by = *zio->io_bp;
+ dr->dt.dl.dr_override_state = DR_OVERRIDDEN;
+ dr->dt.dl.dr_copies = zio->io_prop.zp_copies;
+ if (BP_IS_HOLE(&dr->dt.dl.dr_overridden_by))
+ BP_ZERO(&dr->dt.dl.dr_overridden_by);
+ } else {
+ dr->dt.dl.dr_override_state = DR_NOT_OVERRIDDEN;
+ }
cv_broadcast(&db->db_changed);
mutex_exit(&db->db_mtx);
- if (done)
- done(&(db->db), in->arg);
+ dsa->dsa_done(dsa->dsa_zgd, zio->io_error);
- kmem_free(in, sizeof (dmu_sync_arg_t));
+ kmem_free(dsa, sizeof (*dsa));
+}
+
+static void
+dmu_sync_late_arrival_done(zio_t *zio)
+{
+ blkptr_t *bp = zio->io_bp;
+ dmu_sync_arg_t *dsa = zio->io_private;
+
+ if (zio->io_error == 0 && !BP_IS_HOLE(bp)) {
+ ASSERT(zio->io_bp->blk_birth == zio->io_txg);
+ ASSERT(zio->io_txg > spa_syncing_txg(zio->io_spa));
+ zio_free(zio->io_spa, zio->io_txg, zio->io_bp);
+ }
+
+ dmu_tx_commit(dsa->dsa_tx);
+
+ dsa->dsa_done(dsa->dsa_zgd, zio->io_error);
+
+ kmem_free(dsa, sizeof (*dsa));
+}
+
+static int
+dmu_sync_late_arrival(zio_t *pio, objset_t *os, dmu_sync_cb_t *done, zgd_t *zgd,
+ zio_prop_t *zp, zbookmark_t *zb)
+{
+ dmu_sync_arg_t *dsa;
+ dmu_tx_t *tx;
+
+ tx = dmu_tx_create(os);
+ dmu_tx_hold_space(tx, zgd->zgd_db->db_size);
+ if (dmu_tx_assign(tx, TXG_WAIT) != 0) {
+ dmu_tx_abort(tx);
+ return (EIO); /* Make zl_get_data do txg_waited_synced() */
+ }
+
+ dsa = kmem_alloc(sizeof (dmu_sync_arg_t), KM_SLEEP);
+ dsa->dsa_dr = NULL;
+ dsa->dsa_done = done;
+ dsa->dsa_zgd = zgd;
+ dsa->dsa_tx = tx;
+
+ zio_nowait(zio_write(pio, os->os_spa, dmu_tx_get_txg(tx), zgd->zgd_bp,
+ zgd->zgd_db->db_data, zgd->zgd_db->db_size, zp,
+ dmu_sync_late_arrival_ready, dmu_sync_late_arrival_done, dsa,
+ ZIO_PRIORITY_SYNC_WRITE, ZIO_FLAG_CANFAIL, zb));
+
+ return (0);
}
/*
* EALREADY: this block is already in the process of being synced.
* The caller should track its progress (somehow).
*
- * EINPROGRESS: the IO has been initiated.
- * The caller should log this blkptr in the callback.
+ * EIO: could not do the I/O.
+ * The caller should do a txg_wait_synced().
*
- * 0: completed. Sets *bp to the blkptr just written.
- * The caller should log this blkptr immediately.
+ * 0: the I/O has been initiated.
+ * The caller should log this blkptr in the done callback.
+ * It is possible that the I/O will fail, in which case
+ * the error will be reported to the done callback and
+ * propagated to pio from zio_done().
*/
int
-dmu_sync(zio_t *pio, dmu_buf_t *db_fake,
- blkptr_t *bp, uint64_t txg, dmu_sync_cb_t *done, void *arg)
+dmu_sync(zio_t *pio, uint64_t txg, dmu_sync_cb_t *done, zgd_t *zgd)
{
- dmu_buf_impl_t *db = (dmu_buf_impl_t *)db_fake;
- objset_impl_t *os = db->db_objset;
- dsl_pool_t *dp = os->os_dsl_dataset->ds_dir->dd_pool;
- tx_state_t *tx = &dp->dp_tx;
+ blkptr_t *bp = zgd->zgd_bp;
+ dmu_buf_impl_t *db = (dmu_buf_impl_t *)zgd->zgd_db;
+ objset_t *os = db->db_objset;
+ dsl_dataset_t *ds = os->os_dsl_dataset;
dbuf_dirty_record_t *dr;
- dmu_sync_arg_t *in;
+ dmu_sync_arg_t *dsa;
zbookmark_t zb;
- writeprops_t wp = { 0 };
- zio_t *zio;
- int err;
+ zio_prop_t zp;
+ ASSERT(pio != NULL);
ASSERT(BP_IS_HOLE(bp));
ASSERT(txg != 0);
- dprintf("dmu_sync txg=%llu, s,o,q %llu %llu %llu\n",
- txg, tx->tx_synced_txg, tx->tx_open_txg, tx->tx_quiesced_txg);
+ SET_BOOKMARK(&zb, ds->ds_object,
+ db->db.db_object, db->db_level, db->db_blkid);
+
+ dmu_write_policy(os, db->db_dnode, db->db_level, WP_DMU_SYNC, &zp);
/*
- * XXX - would be nice if we could do this without suspending...
+ * If we're frozen (running ziltest), we always need to generate a bp.
*/
- txg_suspend(dp);
+ if (txg > spa_freeze_txg(os->os_spa))
+ return (dmu_sync_late_arrival(pio, os, done, zgd, &zp, &zb));
/*
- * If this txg already synced, there's nothing to do.
+ * Grabbing db_mtx now provides a barrier between dbuf_sync_leaf()
+ * and us. If we determine that this txg is not yet syncing,
+ * but it begins to sync a moment later, that's OK because the
+ * sync thread will block in dbuf_sync_leaf() until we drop db_mtx.
*/
- if (txg <= tx->tx_synced_txg) {
- txg_resume(dp);
+ mutex_enter(&db->db_mtx);
+
+ if (txg <= spa_last_synced_txg(os->os_spa)) {
/*
- * If we're running ziltest, we need the blkptr regardless.
+ * This txg has already synced. There's nothing to do.
*/
- if (txg > spa_freeze_txg(dp->dp_spa)) {
- /* if db_blkptr == NULL, this was an empty write */
- if (db->db_blkptr)
- *bp = *db->db_blkptr; /* structure assignment */
- return (0);
- }
+ mutex_exit(&db->db_mtx);
return (EEXIST);
}
- mutex_enter(&db->db_mtx);
-
- if (txg == tx->tx_syncing_txg) {
- while (db->db_data_pending) {
- /*
- * IO is in-progress. Wait for it to finish.
- * XXX - would be nice to be able to somehow "attach"
- * this zio to the parent zio passed in.
- */
- cv_wait(&db->db_changed, &db->db_mtx);
- if (!db->db_data_pending &&
- db->db_blkptr && BP_IS_HOLE(db->db_blkptr)) {
- /*
- * IO was compressed away
- */
- *bp = *db->db_blkptr; /* structure assignment */
- mutex_exit(&db->db_mtx);
- txg_resume(dp);
- return (0);
- }
- ASSERT(db->db_data_pending ||
- (db->db_blkptr && db->db_blkptr->blk_birth == txg));
- }
-
- if (db->db_blkptr && db->db_blkptr->blk_birth == txg) {
- /*
- * IO is already completed.
- */
- *bp = *db->db_blkptr; /* structure assignment */
- mutex_exit(&db->db_mtx);
- txg_resume(dp);
- return (0);
- }
+ if (txg <= spa_syncing_txg(os->os_spa)) {
+ /*
+ * This txg is currently syncing, so we can't mess with
+ * the dirty record anymore; just write a new log block.
+ */
+ mutex_exit(&db->db_mtx);
+ return (dmu_sync_late_arrival(pio, os, done, zgd, &zp, &zb));
}
dr = db->db_last_dirty;
- while (dr && dr->dr_txg > txg)
+ while (dr && dr->dr_txg != txg)
dr = dr->dr_next;
- if (dr == NULL || dr->dr_txg < txg) {
+
+ if (dr == NULL) {
/*
- * This dbuf isn't dirty, must have been free_range'd.
+ * There's no dr for this dbuf, so it must have been freed.
* There's no need to log writes to freed blocks, so we're done.
*/
mutex_exit(&db->db_mtx);
- txg_resume(dp);
return (ENOENT);
}
ASSERT(dr->dr_txg == txg);
- if (dr->dt.dl.dr_override_state == DR_IN_DMU_SYNC) {
- /*
- * We have already issued a sync write for this buffer.
- */
- mutex_exit(&db->db_mtx);
- txg_resume(dp);
- return (EALREADY);
- } else if (dr->dt.dl.dr_override_state == DR_OVERRIDDEN) {
+ if (dr->dt.dl.dr_override_state == DR_IN_DMU_SYNC ||
+ dr->dt.dl.dr_override_state == DR_OVERRIDDEN) {
/*
- * This buffer has already been synced. It could not
+ * We have already issued a sync write for this buffer,
+ * or this buffer has already been synced. It could not
* have been dirtied since, or we would have cleared the state.
*/
- *bp = dr->dt.dl.dr_overridden_by; /* structure assignment */
mutex_exit(&db->db_mtx);
- txg_resume(dp);
- return (0);
+ return (EALREADY);
}
+ ASSERT(dr->dt.dl.dr_override_state == DR_NOT_OVERRIDDEN);
dr->dt.dl.dr_override_state = DR_IN_DMU_SYNC;
- in = kmem_alloc(sizeof (dmu_sync_arg_t), KM_SLEEP);
- in->dr = dr;
- in->done = done;
- in->arg = arg;
mutex_exit(&db->db_mtx);
- txg_resume(dp);
-
- zb.zb_objset = os->os_dsl_dataset->ds_object;
- zb.zb_object = db->db.db_object;
- zb.zb_level = db->db_level;
- zb.zb_blkid = db->db_blkid;
- wp.wp_type = db->db_dnode->dn_type;
- wp.wp_level = db->db_level;
- wp.wp_copies = os->os_copies;
- wp.wp_dnchecksum = db->db_dnode->dn_checksum;
- wp.wp_oschecksum = os->os_checksum;
- wp.wp_dncompress = db->db_dnode->dn_compress;
- wp.wp_oscompress = os->os_compress;
+ dsa = kmem_alloc(sizeof (dmu_sync_arg_t), KM_SLEEP);
+ dsa->dsa_dr = dr;
+ dsa->dsa_done = done;
+ dsa->dsa_zgd = zgd;
+ dsa->dsa_tx = NULL;
- ASSERT(BP_IS_HOLE(bp));
+ zio_nowait(arc_write(pio, os->os_spa, txg,
+ bp, dr->dt.dl.dr_data, DBUF_IS_L2CACHEABLE(db), &zp,
+ dmu_sync_ready, dmu_sync_done, dsa,
+ ZIO_PRIORITY_SYNC_WRITE, ZIO_FLAG_CANFAIL, &zb));
- zio = arc_write(pio, os->os_spa, &wp, DBUF_IS_L2CACHEABLE(db),
- txg, bp, dr->dt.dl.dr_data, dmu_sync_ready, dmu_sync_done, in,
- ZIO_PRIORITY_SYNC_WRITE, ZIO_FLAG_MUSTSUCCEED, &zb);
- if (pio) {
- zio_nowait(zio);
- err = EINPROGRESS;
- } else {
- err = zio_wait(zio);
- ASSERT(err == 0);
- }
- return (err);
+ return (0);
}
int
dnode_t *dn;
int err;
- err = dnode_hold(os->os, object, FTAG, &dn);
+ err = dnode_hold(os, object, FTAG, &dn);
if (err)
return (err);
err = dnode_set_blksz(dn, size, ibs, tx);
dnode_t *dn;
/* XXX assumes dnode_hold will not get an i/o error */
- (void) dnode_hold(os->os, object, FTAG, &dn);
+ (void) dnode_hold(os, object, FTAG, &dn);
ASSERT(checksum < ZIO_CHECKSUM_FUNCTIONS);
dn->dn_checksum = checksum;
dnode_setdirty(dn, tx);
dnode_t *dn;
/* XXX assumes dnode_hold will not get an i/o error */
- (void) dnode_hold(os->os, object, FTAG, &dn);
+ (void) dnode_hold(os, object, FTAG, &dn);
ASSERT(compress < ZIO_COMPRESS_FUNCTIONS);
dn->dn_compress = compress;
dnode_setdirty(dn, tx);
dnode_rele(dn, FTAG);
}
+int zfs_mdcomp_disable = 0;
+
+void
+dmu_write_policy(objset_t *os, dnode_t *dn, int level, int wp, zio_prop_t *zp)
+{
+ dmu_object_type_t type = dn ? dn->dn_type : DMU_OT_OBJSET;
+ boolean_t ismd = (level > 0 || dmu_ot[type].ot_metadata);
+ enum zio_checksum checksum = os->os_checksum;
+ enum zio_compress compress = os->os_compress;
+ enum zio_checksum dedup_checksum = os->os_dedup_checksum;
+ boolean_t dedup;
+ boolean_t dedup_verify = os->os_dedup_verify;
+ int copies = os->os_copies;
+
+ /*
+ * Determine checksum setting.
+ */
+ if (ismd) {
+ /*
+ * Metadata always gets checksummed. If the data
+ * checksum is multi-bit correctable, and it's not a
+ * ZBT-style checksum, then it's suitable for metadata
+ * as well. Otherwise, the metadata checksum defaults
+ * to fletcher4.
+ */
+ if (zio_checksum_table[checksum].ci_correctable < 1 ||
+ zio_checksum_table[checksum].ci_eck)
+ checksum = ZIO_CHECKSUM_FLETCHER_4;
+ } else {
+ checksum = zio_checksum_select(dn->dn_checksum, checksum);
+ }
+
+ /*
+ * Determine compression setting.
+ */
+ if (ismd) {
+ /*
+ * XXX -- we should design a compression algorithm
+ * that specializes in arrays of bps.
+ */
+ compress = zfs_mdcomp_disable ? ZIO_COMPRESS_EMPTY :
+ ZIO_COMPRESS_LZJB;
+ } else {
+ compress = zio_compress_select(dn->dn_compress, compress);
+ }
+
+ /*
+ * Determine dedup setting. If we are in dmu_sync(), we won't
+ * actually dedup now because that's all done in syncing context;
+ * but we do want to use the dedup checkum. If the checksum is not
+ * strong enough to ensure unique signatures, force dedup_verify.
+ */
+ dedup = (!ismd && dedup_checksum != ZIO_CHECKSUM_OFF);
+ if (dedup) {
+ checksum = dedup_checksum;
+ if (!zio_checksum_table[checksum].ci_dedup)
+ dedup_verify = 1;
+ }
+
+ if (wp & WP_DMU_SYNC)
+ dedup = 0;
+
+ if (wp & WP_NOFILL) {
+ ASSERT(!ismd && level == 0);
+ checksum = ZIO_CHECKSUM_OFF;
+ compress = ZIO_COMPRESS_OFF;
+ dedup = B_FALSE;
+ }
+
+ zp->zp_checksum = checksum;
+ zp->zp_compress = compress;
+ zp->zp_type = (wp & WP_SPILL) ? dn->dn_bonustype : type;
+ zp->zp_level = level;
+ zp->zp_copies = MIN(copies + ismd, spa_max_replication(os->os_spa));
+ zp->zp_dedup = dedup;
+ zp->zp_dedup_verify = dedup && dedup_verify;
+}
+
int
dmu_offset_next(objset_t *os, uint64_t object, boolean_t hole, uint64_t *off)
{
dnode_t *dn;
int i, err;
- err = dnode_hold(os->os, object, FTAG, &dn);
+ err = dnode_hold(os, object, FTAG, &dn);
if (err)
return (err);
/*
if (i != TXG_SIZE) {
dnode_rele(dn, FTAG);
txg_wait_synced(dmu_objset_pool(os), 0);
- err = dnode_hold(os->os, object, FTAG, &dn);
+ err = dnode_hold(os, object, FTAG, &dn);
if (err)
return (err);
}
void
dmu_object_info_from_dnode(dnode_t *dn, dmu_object_info_t *doi)
{
+ dnode_phys_t *dnp;
+
rw_enter(&dn->dn_struct_rwlock, RW_READER);
mutex_enter(&dn->dn_mtx);
+ dnp = dn->dn_phys;
+
doi->doi_data_block_size = dn->dn_datablksz;
doi->doi_metadata_block_size = dn->dn_indblkshift ?
1ULL << dn->dn_indblkshift : 0;
+ doi->doi_type = dn->dn_type;
+ doi->doi_bonus_type = dn->dn_bonustype;
+ doi->doi_bonus_size = dn->dn_bonuslen;
doi->doi_indirection = dn->dn_nlevels;
doi->doi_checksum = dn->dn_checksum;
doi->doi_compress = dn->dn_compress;
- doi->doi_physical_blks = (DN_USED_BYTES(dn->dn_phys) +
- SPA_MINBLOCKSIZE/2) >> SPA_MINBLOCKSHIFT;
- doi->doi_max_block_offset = dn->dn_phys->dn_maxblkid;
- doi->doi_type = dn->dn_type;
- doi->doi_bonus_size = dn->dn_bonuslen;
- doi->doi_bonus_type = dn->dn_bonustype;
+ doi->doi_physical_blocks_512 = (DN_USED_BYTES(dnp) + 256) >> 9;
+ doi->doi_max_offset = (dnp->dn_maxblkid + 1) * dn->dn_datablksz;
+ doi->doi_fill_count = 0;
+ for (int i = 0; i < dnp->dn_nblkptr; i++)
+ doi->doi_fill_count += dnp->dn_blkptr[i].blk_fill;
mutex_exit(&dn->dn_mtx);
rw_exit(&dn->dn_struct_rwlock);
dmu_object_info(objset_t *os, uint64_t object, dmu_object_info_t *doi)
{
dnode_t *dn;
- int err = dnode_hold(os->os, object, FTAG, &dn);
+ int err = dnode_hold(os, object, FTAG, &dn);
if (err)
return (err);
void
dmu_init(void)
{
+ zfs_dbgmsg_init();
dbuf_init();
dnode_init();
+ zfetch_init();
arc_init();
l2arc_init();
+ xuio_stat_init();
+ sa_cache_init();
}
void
dmu_fini(void)
{
arc_fini();
+ zfetch_fini();
dnode_fini();
dbuf_fini();
l2arc_fini();
+ xuio_stat_fini();
+ sa_cache_fini();
+ zfs_dbgmsg_fini();
}
git://git.camperquake.de / zfs.git / blobdiff