*/
/*
* Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2011 by Delphix. All rights reserved.
+ * Copyright 2011 Nexenta Systems, Inc. All rights reserved.
+ * Copyright (c) 2011 by Delphix. All rights reserved.
*/
#include <sys/dmu.h>
#include <sys/ddt.h>
#include <sys/zfs_onexit.h>
+/* Set this tunable to TRUE to replace corrupt data with 0x2f5baddb10c */
+int zfs_send_corrupt_data = B_FALSE;
+
static char *dmu_recv_tag = "dmu_recv_tag";
/*
if (dsl_read(NULL, spa, bp, pbuf,
arc_getbuf_func, &abuf, ZIO_PRIORITY_ASYNC_READ,
- ZIO_FLAG_CANFAIL, &aflags, zb) != 0)
- return (EIO);
+ ZIO_FLAG_CANFAIL, &aflags, zb) != 0) {
+ if (zfs_send_corrupt_data) {
+ uint64_t *ptr;
+ /* Send a block filled with 0x"zfs badd bloc" */
+ abuf = arc_buf_alloc(spa, blksz, &abuf,
+ ARC_BUFC_DATA);
+ for (ptr = abuf->b_data;
+ (char *)ptr < (char *)abuf->b_data + blksz;
+ ptr++)
+ *ptr = 0x2f5baddb10c;
+ } else {
+ return (EIO);
+ }
+ }
err = dump_data(ba, type, zb->zb_object, zb->zb_blkid * blksz,
blksz, bp, abuf->b_data);
return (0);
}
+int
+dmu_send_estimate(objset_t *tosnap, objset_t *fromsnap, boolean_t fromorigin,
+ uint64_t *sizep)
+{
+ dsl_dataset_t *ds = tosnap->os_dsl_dataset;
+ dsl_dataset_t *fromds = fromsnap ? fromsnap->os_dsl_dataset : NULL;
+ dsl_pool_t *dp = ds->ds_dir->dd_pool;
+ int err;
+ uint64_t size, recordsize;
+
+ /* tosnap must be a snapshot */
+ if (ds->ds_phys->ds_next_snap_obj == 0)
+ return (EINVAL);
+
+ /* fromsnap must be an earlier snapshot from the same fs as tosnap */
+ if (fromds && (ds->ds_dir != fromds->ds_dir ||
+ fromds->ds_phys->ds_creation_txg >= ds->ds_phys->ds_creation_txg))
+ return (EXDEV);
+
+ if (fromorigin) {
+ if (fromsnap)
+ return (EINVAL);
+
+ if (dsl_dir_is_clone(ds->ds_dir)) {
+ rw_enter(&dp->dp_config_rwlock, RW_READER);
+ err = dsl_dataset_hold_obj(dp,
+ ds->ds_dir->dd_phys->dd_origin_obj, FTAG, &fromds);
+ rw_exit(&dp->dp_config_rwlock);
+ if (err)
+ return (err);
+ } else {
+ fromorigin = B_FALSE;
+ }
+ }
+
+ /* Get uncompressed size estimate of changed data. */
+ if (fromds == NULL) {
+ size = ds->ds_phys->ds_uncompressed_bytes;
+ } else {
+ uint64_t used, comp;
+ err = dsl_dataset_space_written(fromds, ds,
+ &used, &comp, &size);
+ if (fromorigin)
+ dsl_dataset_rele(fromds, FTAG);
+ if (err)
+ return (err);
+ }
+
+ /*
+ * Assume that space (both on-disk and in-stream) is dominated by
+ * data. We will adjust for indirect blocks and the copies property,
+ * but ignore per-object space used (eg, dnodes and DRR_OBJECT records).
+ */
+
+ /*
+ * Subtract out approximate space used by indirect blocks.
+ * Assume most space is used by data blocks (non-indirect, non-dnode).
+ * Assume all blocks are recordsize. Assume ditto blocks and
+ * internal fragmentation counter out compression.
+ *
+ * Therefore, space used by indirect blocks is sizeof(blkptr_t) per
+ * block, which we observe in practice.
+ */
+ rw_enter(&dp->dp_config_rwlock, RW_READER);
+ err = dsl_prop_get_ds(ds, "recordsize",
+ sizeof (recordsize), 1, &recordsize, NULL);
+ rw_exit(&dp->dp_config_rwlock);
+ if (err)
+ return (err);
+ size -= size / recordsize * sizeof (blkptr_t);
+
+ /* Add in the space for the record associated with each block. */
+ size += size / recordsize * sizeof (dmu_replay_record_t);
+
+ *sizep = size;
+
+ return (0);
+}
+
struct recvbeginsyncarg {
const char *tofs;
const char *tosnap;
return (0);
}
-/*
- * This function is a callback used by dmu_objset_find() (which
- * enumerates the object sets) to build an avl tree that maps guids
- * to datasets. The resulting table is used when processing DRR_WRITE_BYREF
- * send stream records. These records, which are used in dedup'ed
- * streams, do not contain data themselves, but refer to a copy
- * of the data block that has already been written because it was
- * earlier in the stream. That previous copy is identified by the
- * guid of the dataset with the referenced data.
- */
-int
-find_ds_by_guid(const char *name, void *arg)
-{
- avl_tree_t *guid_map = arg;
- dsl_dataset_t *ds, *snapds;
- guid_map_entry_t *gmep;
- dsl_pool_t *dp;
- int err;
- uint64_t lastobj, firstobj;
-
- if (dsl_dataset_hold(name, FTAG, &ds) != 0)
- return (0);
-
- dp = ds->ds_dir->dd_pool;
- rw_enter(&dp->dp_config_rwlock, RW_READER);
- firstobj = ds->ds_dir->dd_phys->dd_origin_obj;
- lastobj = ds->ds_phys->ds_prev_snap_obj;
-
- while (lastobj != firstobj) {
- err = dsl_dataset_hold_obj(dp, lastobj, guid_map, &snapds);
- if (err) {
- /*
- * Skip this snapshot and move on. It's not
- * clear why this would ever happen, but the
- * remainder of the snapshot streadm can be
- * processed.
- */
- rw_exit(&dp->dp_config_rwlock);
- dsl_dataset_rele(ds, FTAG);
- return (0);
- }
-
- gmep = kmem_alloc(sizeof (guid_map_entry_t), KM_SLEEP);
- gmep->guid = snapds->ds_phys->ds_guid;
- gmep->gme_ds = snapds;
- avl_add(guid_map, gmep);
- lastobj = snapds->ds_phys->ds_prev_snap_obj;
- }
-
- rw_exit(&dp->dp_config_rwlock);
- dsl_dataset_rele(ds, FTAG);
-
- return (0);
-}
-
static void
free_guid_map_onexit(void *arg)
{
return (rv);
}
-static void
+noinline static void
backup_byteswap(dmu_replay_record_t *drr)
{
#define DO64(X) (drr->drr_u.X = BSWAP_64(drr->drr_u.X))
DO64(drr_end.drr_checksum.zc_word[3]);
DO64(drr_end.drr_toguid);
break;
+ default:
+ break;
}
#undef DO64
#undef DO32
}
-static int
+noinline static int
restore_object(struct restorearg *ra, objset_t *os, struct drr_object *drro)
{
int err;
}
/* ARGSUSED */
-static int
+noinline static int
restore_freeobjects(struct restorearg *ra, objset_t *os,
struct drr_freeobjects *drrfo)
{
return (0);
}
-static int
+noinline static int
restore_write(struct restorearg *ra, objset_t *os,
struct drr_write *drrw)
{
ref_os = os;
}
- if (err = dmu_buf_hold(ref_os, drrwbr->drr_refobject,
- drrwbr->drr_refoffset, FTAG, &dbp, DMU_READ_PREFETCH))
+ err = dmu_buf_hold(ref_os, drrwbr->drr_refobject,
+ drrwbr->drr_refoffset, FTAG, &dbp, DMU_READ_PREFETCH);
+ if (err)
return (err);
tx = dmu_tx_create(os);
}
/* ARGSUSED */
-static int
+noinline static int
restore_free(struct restorearg *ra, objset_t *os,
struct drr_free *drrf)
{
ra.vp = vp;
ra.voff = *voffp;
ra.bufsize = 1<<20;
- ra.buf = kmem_alloc(ra.bufsize, KM_SLEEP);
+ ra.buf = vmem_alloc(ra.bufsize, KM_SLEEP);
/* these were verified in dmu_recv_begin */
ASSERT(DMU_GET_STREAM_HDRTYPE(drc->drc_drrb->drr_versioninfo) ==
avl_create(ra.guid_to_ds_map, guid_compare,
sizeof (guid_map_entry_t),
offsetof(guid_map_entry_t, avlnode));
- (void) dmu_objset_find(drc->drc_top_ds, find_ds_by_guid,
- (void *)ra.guid_to_ds_map,
- DS_FIND_CHILDREN);
ra.err = zfs_onexit_add_cb(minor,
free_guid_map_onexit, ra.guid_to_ds_map,
action_handlep);
if (ra.err)
goto out;
}
+
+ drc->drc_guid_to_ds_map = ra.guid_to_ds_map;
}
/*
}
}
- kmem_free(ra.buf, ra.bufsize);
+ vmem_free(ra.buf, ra.bufsize);
*voffp = ra.voff;
return (ra.err);
}
}
static int
+add_ds_to_guidmap(avl_tree_t *guid_map, dsl_dataset_t *ds)
+{
+ dsl_pool_t *dp = ds->ds_dir->dd_pool;
+ uint64_t snapobj = ds->ds_phys->ds_prev_snap_obj;
+ dsl_dataset_t *snapds;
+ guid_map_entry_t *gmep;
+ int err;
+
+ ASSERT(guid_map != NULL);
+
+ rw_enter(&dp->dp_config_rwlock, RW_READER);
+ err = dsl_dataset_hold_obj(dp, snapobj, guid_map, &snapds);
+ if (err == 0) {
+ gmep = kmem_alloc(sizeof (guid_map_entry_t), KM_SLEEP);
+ gmep->guid = snapds->ds_phys->ds_guid;
+ gmep->gme_ds = snapds;
+ avl_add(guid_map, gmep);
+ }
+
+ rw_exit(&dp->dp_config_rwlock);
+ return (err);
+}
+
+static int
dmu_recv_existing_end(dmu_recv_cookie_t *drc)
{
struct recvendsyncarg resa;
dsl_dataset_t *ds = drc->drc_logical_ds;
- int err;
+ int err, myerr;
/*
* XXX hack; seems the ds is still dirty and dsl_pool_zil_clean()
out:
mutex_exit(&ds->ds_recvlock);
+ if (err == 0 && drc->drc_guid_to_ds_map != NULL)
+ (void) add_ds_to_guidmap(drc->drc_guid_to_ds_map, ds);
dsl_dataset_disown(ds, dmu_recv_tag);
- (void) dsl_dataset_destroy(drc->drc_real_ds, dmu_recv_tag, B_FALSE);
+ myerr = dsl_dataset_destroy(drc->drc_real_ds, dmu_recv_tag, B_FALSE);
+ ASSERT3U(myerr, ==, 0);
return (err);
}
/* clean up the fs we just recv'd into */
(void) dsl_dataset_destroy(ds, dmu_recv_tag, B_FALSE);
} else {
+ if (drc->drc_guid_to_ds_map != NULL)
+ (void) add_ds_to_guidmap(drc->drc_guid_to_ds_map, ds);
/* release the hold from dmu_recv_begin */
dsl_dataset_disown(ds, dmu_recv_tag);
}
git://git.camperquake.de / zfs.git / blobdiff