* CDDL HEADER END
*/
/*
- * Copyright 2007 Sun Microsystems, Inc. All rights reserved.
+ * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
-#pragma ident "@(#)dmu.c 1.30 07/11/09 SMI"
-
#include <sys/dmu.h>
#include <sys/dmu_impl.h>
#include <sys/dmu_tx.h>
#include <sys/zio_checksum.h>
#ifdef _KERNEL
#include <sys/vmsystm.h>
+#include <sys/zfs_znode.h>
#endif
const dmu_object_type_info_t dmu_ot[DMU_OT_NUMTYPES] = {
{ byteswap_uint8_array, TRUE, "ZFS SYSACL" },
{ 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" },
};
int
dmu_buf_hold_array_by_dnode(dnode_t *dn, uint64_t offset,
uint64_t length, int read, void *tag, int *numbufsp, dmu_buf_t ***dbpp)
{
+ dsl_pool_t *dp = NULL;
dmu_buf_t **dbp;
uint64_t blkid, nblks, i;
uint32_t flags;
int err;
zio_t *zio;
+ hrtime_t start;
ASSERT(length <= DMU_MAX_ACCESS);
}
dbp = kmem_zalloc(sizeof (dmu_buf_t *) * nblks, KM_SLEEP);
- zio = zio_root(dn->dn_objset->os_spa, NULL, NULL, TRUE);
+ if (dn->dn_objset->os_dsl_dataset)
+ dp = dn->dn_objset->os_dsl_dataset->ds_dir->dd_pool;
+ if (dp && dsl_pool_sync_context(dp))
+ start = gethrtime();
+ zio = zio_root(dn->dn_objset->os_spa, NULL, NULL, ZIO_FLAG_CANFAIL);
blkid = dbuf_whichblock(dn, offset);
for (i = 0; i < nblks; i++) {
dmu_buf_impl_t *db = dbuf_hold(dn, blkid+i, tag);
/* wait for async i/o */
err = zio_wait(zio);
+ /* track read overhead when we are in sync context */
+ if (dp && dsl_pool_sync_context(dp))
+ dp->dp_read_overhead += gethrtime() - start;
if (err) {
dmu_buf_rele_array(dbp, nblks, tag);
return (err);
dnode_rele(dn, FTAG);
}
+static int
+get_next_chunk(dnode_t *dn, uint64_t *offset, uint64_t limit)
+{
+ uint64_t len = *offset - limit;
+ uint64_t chunk_len = dn->dn_datablksz * DMU_MAX_DELETEBLKCNT;
+ uint64_t subchunk =
+ dn->dn_datablksz * EPB(dn->dn_indblkshift, SPA_BLKPTRSHIFT);
+
+ ASSERT(limit <= *offset);
+
+ if (len <= chunk_len) {
+ *offset = limit;
+ return (0);
+ }
+
+ ASSERT(ISP2(subchunk));
+
+ while (*offset > limit) {
+ uint64_t initial_offset = P2ROUNDUP(*offset, subchunk);
+ uint64_t delta;
+ int err;
+
+ /* skip over allocated data */
+ err = dnode_next_offset(dn,
+ DNODE_FIND_HOLE|DNODE_FIND_BACKWARDS, offset, 1, 1, 0);
+ if (err == ESRCH)
+ *offset = limit;
+ else if (err)
+ return (err);
+
+ ASSERT3U(*offset, <=, initial_offset);
+ *offset = P2ALIGN(*offset, subchunk);
+ delta = initial_offset - *offset;
+ if (delta >= chunk_len) {
+ *offset += delta - chunk_len;
+ return (0);
+ }
+ chunk_len -= delta;
+
+ /* skip over unallocated data */
+ err = dnode_next_offset(dn,
+ DNODE_FIND_BACKWARDS, offset, 1, 1, 0);
+ if (err == ESRCH)
+ *offset = limit;
+ else if (err)
+ return (err);
+
+ if (*offset < limit)
+ *offset = limit;
+ ASSERT3U(*offset, <, initial_offset);
+ }
+ return (0);
+}
+
+static int
+dmu_free_long_range_impl(objset_t *os, dnode_t *dn, uint64_t offset,
+ uint64_t length, boolean_t free_dnode)
+{
+ dmu_tx_t *tx;
+ uint64_t object_size, start, end, len;
+ boolean_t trunc = (length == DMU_OBJECT_END);
+ int align, err;
+
+ align = 1 << dn->dn_datablkshift;
+ ASSERT(align > 0);
+ object_size = align == 1 ? dn->dn_datablksz :
+ (dn->dn_maxblkid + 1) << dn->dn_datablkshift;
+
+ if (trunc || (end = offset + length) > object_size)
+ end = object_size;
+ if (end <= offset)
+ return (0);
+ length = end - offset;
+
+ while (length) {
+ start = end;
+ err = get_next_chunk(dn, &start, offset);
+ if (err)
+ return (err);
+ len = trunc ? DMU_OBJECT_END : end - start;
+
+ tx = dmu_tx_create(os);
+ dmu_tx_hold_free(tx, dn->dn_object, start, len);
+ err = dmu_tx_assign(tx, TXG_WAIT);
+ if (err) {
+ dmu_tx_abort(tx);
+ return (err);
+ }
+
+ dnode_free_range(dn, start, trunc ? -1 : len, tx);
+
+ if (start == 0 && free_dnode) {
+ ASSERT(trunc);
+ dnode_free(dn, tx);
+ }
+
+ length -= end - start;
+
+ dmu_tx_commit(tx);
+ end = start;
+ }
+ return (0);
+}
+
+int
+dmu_free_long_range(objset_t *os, uint64_t object,
+ uint64_t offset, uint64_t length)
+{
+ dnode_t *dn;
+ int err;
+
+ err = dnode_hold(os->os, object, FTAG, &dn);
+ if (err != 0)
+ return (err);
+ err = dmu_free_long_range_impl(os, dn, offset, length, FALSE);
+ dnode_rele(dn, FTAG);
+ return (err);
+}
+
+int
+dmu_free_object(objset_t *os, uint64_t object)
+{
+ dnode_t *dn;
+ dmu_tx_t *tx;
+ int err;
+
+ err = dnode_hold_impl(os->os, object, DNODE_MUST_BE_ALLOCATED,
+ FTAG, &dn);
+ if (err != 0)
+ return (err);
+ if (dn->dn_nlevels == 1) {
+ tx = dmu_tx_create(os);
+ dmu_tx_hold_bonus(tx, object);
+ dmu_tx_hold_free(tx, dn->dn_object, 0, DMU_OBJECT_END);
+ err = dmu_tx_assign(tx, TXG_WAIT);
+ if (err == 0) {
+ dnode_free_range(dn, 0, DMU_OBJECT_END, tx);
+ dnode_free(dn, tx);
+ dmu_tx_commit(tx);
+ } else {
+ dmu_tx_abort(tx);
+ }
+ } else {
+ err = dmu_free_long_range_impl(os, dn, 0, DMU_OBJECT_END, TRUE);
+ }
+ dnode_rele(dn, FTAG);
+ return (err);
+}
+
int
dmu_free_range(objset_t *os, uint64_t object, uint64_t offset,
uint64_t size, dmu_tx_t *tx)
dmu_buf_rele_array(dbp, numbufs, FTAG);
}
+void
+dmu_prealloc(objset_t *os, uint64_t object, uint64_t offset, uint64_t size,
+ dmu_tx_t *tx)
+{
+ dmu_buf_t **dbp;
+ int numbufs, i;
+
+ if (size == 0)
+ return;
+
+ VERIFY(0 == dmu_buf_hold_array(os, object, offset, size,
+ FALSE, FTAG, &numbufs, &dbp));
+
+ for (i = 0; i < numbufs; i++) {
+ dmu_buf_t *db = dbp[i];
+
+ dmu_buf_will_not_fill(db, tx);
+ }
+ dmu_buf_rele_array(dbp, numbufs, FTAG);
+}
+
#ifdef _KERNEL
int
dmu_read_uio(objset_t *os, uint64_t object, uio_t *uio, uint64_t size)
for (copied = 0; copied < tocpy; copied += PAGESIZE) {
ASSERT3U(pp->p_offset, ==, db->db_offset + bufoff);
thiscpy = MIN(PAGESIZE, tocpy - copied);
- va = ppmapin(pp, PROT_READ, (caddr_t)-1);
+ va = zfs_map_page(pp, S_READ);
bcopy(va, (char *)db->db_data + bufoff, thiscpy);
- ppmapout(va);
+ zfs_unmap_page(pp, va);
pp = pp->p_next;
bufoff += PAGESIZE;
}
/* ARGSUSED */
static void
+dmu_sync_ready(zio_t *zio, arc_buf_t *buf, void *varg)
+{
+ 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;
+ }
+}
+
+/* ARGSUSED */
+static void
dmu_sync_done(zio_t *zio, arc_buf_t *buf, void *varg)
{
dmu_sync_arg_t *in = varg;
dmu_buf_impl_t *db = dr->dr_dbuf;
dmu_sync_cb_t *done = in->done;
- if (!BP_IS_HOLE(zio->io_bp)) {
- zio->io_bp->blk_fill = 1;
- BP_SET_TYPE(zio->io_bp, db->db_dnode->dn_type);
- BP_SET_LEVEL(zio->io_bp, 0);
- }
-
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 */
dbuf_dirty_record_t *dr;
dmu_sync_arg_t *in;
zbookmark_t zb;
+ writeprops_t wp = { 0 };
zio_t *zio;
- int zio_flags;
int err;
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);
zb.zb_object = db->db.db_object;
zb.zb_level = db->db_level;
zb.zb_blkid = db->db_blkid;
- zio_flags = ZIO_FLAG_MUSTSUCCEED;
- if (dmu_ot[db->db_dnode->dn_type].ot_metadata || zb.zb_level != 0)
- zio_flags |= ZIO_FLAG_METADATA;
- zio = arc_write(pio, os->os_spa,
- zio_checksum_select(db->db_dnode->dn_checksum, os->os_checksum),
- zio_compress_select(db->db_dnode->dn_compress, os->os_compress),
- dmu_get_replication_level(os, &zb, db->db_dnode->dn_type),
- txg, bp, dr->dt.dl.dr_data, NULL, dmu_sync_done, in,
- ZIO_PRIORITY_SYNC_WRITE, zio_flags, &zb);
+ 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;
+
+ ASSERT(BP_IS_HOLE(bp));
+
+ 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;
}
int
-dmu_get_replication_level(objset_impl_t *os,
- zbookmark_t *zb, dmu_object_type_t ot)
-{
- int ncopies = os->os_copies;
-
- /* If it's the mos, it should have max copies set. */
- ASSERT(zb->zb_objset != 0 ||
- ncopies == spa_max_replication(os->os_spa));
-
- if (dmu_ot[ot].ot_metadata || zb->zb_level != 0)
- ncopies++;
- return (MIN(ncopies, spa_max_replication(os->os_spa)));
-}
-
-int
dmu_offset_next(objset_t *os, uint64_t object, boolean_t hole, uint64_t *off)
{
dnode_t *dn;
return (err);
}
- err = dnode_next_offset(dn, hole, off, 1, 1, 0);
+ err = dnode_next_offset(dn, (hole ? DNODE_FIND_HOLE : 0), off, 1, 1, 0);
dnode_rele(dn, FTAG);
return (err);
git://git.camperquake.de / zfs.git / blobdiff