c65aa5b2b9
Gcc -Wall warn: 'missing parenthesis' Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
1610 lines
42 KiB
C
1610 lines
42 KiB
C
/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License (the "License").
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* You may not use this file except in compliance with the License.
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*
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* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
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* or http://www.opensolaris.org/os/licensing.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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* If applicable, add the following below this CDDL HEADER, with the
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* fields enclosed by brackets "[]" replaced with your own identifying
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* information: Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*/
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/*
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* Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
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*/
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#include <sys/dmu.h>
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#include <sys/dmu_impl.h>
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#include <sys/dmu_tx.h>
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#include <sys/dbuf.h>
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#include <sys/dnode.h>
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#include <sys/zfs_context.h>
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#include <sys/dmu_objset.h>
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#include <sys/dmu_traverse.h>
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#include <sys/dsl_dataset.h>
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#include <sys/dsl_dir.h>
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#include <sys/dsl_prop.h>
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#include <sys/dsl_pool.h>
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#include <sys/dsl_synctask.h>
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#include <sys/zfs_ioctl.h>
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#include <sys/zap.h>
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#include <sys/zio_checksum.h>
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#include <sys/zfs_znode.h>
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#include <zfs_fletcher.h>
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#include <sys/avl.h>
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#include <sys/ddt.h>
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#include <sys/zfs_onexit.h>
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static char *dmu_recv_tag = "dmu_recv_tag";
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/*
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* The list of data whose inclusion in a send stream can be pending from
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* one call to backup_cb to another. Multiple calls to dump_free() and
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* dump_freeobjects() can be aggregated into a single DRR_FREE or
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* DRR_FREEOBJECTS replay record.
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*/
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typedef enum {
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PENDING_NONE,
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PENDING_FREE,
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PENDING_FREEOBJECTS
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} pendop_t;
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struct backuparg {
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dmu_replay_record_t *drr;
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vnode_t *vp;
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offset_t *off;
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objset_t *os;
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zio_cksum_t zc;
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uint64_t toguid;
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int err;
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pendop_t pending_op;
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};
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static int
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dump_bytes(struct backuparg *ba, void *buf, int len)
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{
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ssize_t resid; /* have to get resid to get detailed errno */
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ASSERT3U(len % 8, ==, 0);
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fletcher_4_incremental_native(buf, len, &ba->zc);
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ba->err = vn_rdwr(UIO_WRITE, ba->vp,
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(caddr_t)buf, len,
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0, UIO_SYSSPACE, FAPPEND, RLIM64_INFINITY, CRED(), &resid);
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*ba->off += len;
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return (ba->err);
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}
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static int
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dump_free(struct backuparg *ba, uint64_t object, uint64_t offset,
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uint64_t length)
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{
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struct drr_free *drrf = &(ba->drr->drr_u.drr_free);
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/*
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* If there is a pending op, but it's not PENDING_FREE, push it out,
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* since free block aggregation can only be done for blocks of the
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* same type (i.e., DRR_FREE records can only be aggregated with
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* other DRR_FREE records. DRR_FREEOBJECTS records can only be
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* aggregated with other DRR_FREEOBJECTS records.
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*/
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if (ba->pending_op != PENDING_NONE && ba->pending_op != PENDING_FREE) {
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if (dump_bytes(ba, ba->drr, sizeof (dmu_replay_record_t)) != 0)
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return (EINTR);
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ba->pending_op = PENDING_NONE;
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}
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if (ba->pending_op == PENDING_FREE) {
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/*
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* There should never be a PENDING_FREE if length is -1
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* (because dump_dnode is the only place where this
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* function is called with a -1, and only after flushing
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* any pending record).
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*/
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ASSERT(length != -1ULL);
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/*
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* Check to see whether this free block can be aggregated
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* with pending one.
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*/
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if (drrf->drr_object == object && drrf->drr_offset +
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drrf->drr_length == offset) {
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drrf->drr_length += length;
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return (0);
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} else {
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/* not a continuation. Push out pending record */
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if (dump_bytes(ba, ba->drr,
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sizeof (dmu_replay_record_t)) != 0)
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return (EINTR);
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ba->pending_op = PENDING_NONE;
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}
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}
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/* create a FREE record and make it pending */
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bzero(ba->drr, sizeof (dmu_replay_record_t));
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ba->drr->drr_type = DRR_FREE;
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drrf->drr_object = object;
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drrf->drr_offset = offset;
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drrf->drr_length = length;
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drrf->drr_toguid = ba->toguid;
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if (length == -1ULL) {
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if (dump_bytes(ba, ba->drr, sizeof (dmu_replay_record_t)) != 0)
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return (EINTR);
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} else {
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ba->pending_op = PENDING_FREE;
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}
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return (0);
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}
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static int
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dump_data(struct backuparg *ba, dmu_object_type_t type,
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uint64_t object, uint64_t offset, int blksz, const blkptr_t *bp, void *data)
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{
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struct drr_write *drrw = &(ba->drr->drr_u.drr_write);
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/*
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* If there is any kind of pending aggregation (currently either
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* a grouping of free objects or free blocks), push it out to
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* the stream, since aggregation can't be done across operations
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* of different types.
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*/
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if (ba->pending_op != PENDING_NONE) {
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if (dump_bytes(ba, ba->drr, sizeof (dmu_replay_record_t)) != 0)
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return (EINTR);
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ba->pending_op = PENDING_NONE;
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}
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/* write a DATA record */
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bzero(ba->drr, sizeof (dmu_replay_record_t));
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ba->drr->drr_type = DRR_WRITE;
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drrw->drr_object = object;
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drrw->drr_type = type;
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drrw->drr_offset = offset;
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drrw->drr_length = blksz;
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drrw->drr_toguid = ba->toguid;
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drrw->drr_checksumtype = BP_GET_CHECKSUM(bp);
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if (zio_checksum_table[drrw->drr_checksumtype].ci_dedup)
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drrw->drr_checksumflags |= DRR_CHECKSUM_DEDUP;
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DDK_SET_LSIZE(&drrw->drr_key, BP_GET_LSIZE(bp));
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DDK_SET_PSIZE(&drrw->drr_key, BP_GET_PSIZE(bp));
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DDK_SET_COMPRESS(&drrw->drr_key, BP_GET_COMPRESS(bp));
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drrw->drr_key.ddk_cksum = bp->blk_cksum;
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if (dump_bytes(ba, ba->drr, sizeof (dmu_replay_record_t)) != 0)
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return (EINTR);
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if (dump_bytes(ba, data, blksz) != 0)
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return (EINTR);
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return (0);
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}
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static int
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dump_spill(struct backuparg *ba, uint64_t object, int blksz, void *data)
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{
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struct drr_spill *drrs = &(ba->drr->drr_u.drr_spill);
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if (ba->pending_op != PENDING_NONE) {
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if (dump_bytes(ba, ba->drr, sizeof (dmu_replay_record_t)) != 0)
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return (EINTR);
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ba->pending_op = PENDING_NONE;
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}
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/* write a SPILL record */
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bzero(ba->drr, sizeof (dmu_replay_record_t));
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ba->drr->drr_type = DRR_SPILL;
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drrs->drr_object = object;
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drrs->drr_length = blksz;
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drrs->drr_toguid = ba->toguid;
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if (dump_bytes(ba, ba->drr, sizeof (dmu_replay_record_t)))
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return (EINTR);
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if (dump_bytes(ba, data, blksz))
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return (EINTR);
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return (0);
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}
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static int
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dump_freeobjects(struct backuparg *ba, uint64_t firstobj, uint64_t numobjs)
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{
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struct drr_freeobjects *drrfo = &(ba->drr->drr_u.drr_freeobjects);
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/*
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* If there is a pending op, but it's not PENDING_FREEOBJECTS,
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* push it out, since free block aggregation can only be done for
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* blocks of the same type (i.e., DRR_FREE records can only be
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* aggregated with other DRR_FREE records. DRR_FREEOBJECTS records
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* can only be aggregated with other DRR_FREEOBJECTS records.
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*/
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if (ba->pending_op != PENDING_NONE &&
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ba->pending_op != PENDING_FREEOBJECTS) {
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if (dump_bytes(ba, ba->drr, sizeof (dmu_replay_record_t)) != 0)
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return (EINTR);
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ba->pending_op = PENDING_NONE;
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}
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if (ba->pending_op == PENDING_FREEOBJECTS) {
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/*
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* See whether this free object array can be aggregated
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* with pending one
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*/
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if (drrfo->drr_firstobj + drrfo->drr_numobjs == firstobj) {
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drrfo->drr_numobjs += numobjs;
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return (0);
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} else {
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/* can't be aggregated. Push out pending record */
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if (dump_bytes(ba, ba->drr,
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sizeof (dmu_replay_record_t)) != 0)
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return (EINTR);
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ba->pending_op = PENDING_NONE;
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}
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}
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/* write a FREEOBJECTS record */
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bzero(ba->drr, sizeof (dmu_replay_record_t));
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ba->drr->drr_type = DRR_FREEOBJECTS;
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drrfo->drr_firstobj = firstobj;
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drrfo->drr_numobjs = numobjs;
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drrfo->drr_toguid = ba->toguid;
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ba->pending_op = PENDING_FREEOBJECTS;
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return (0);
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}
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static int
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dump_dnode(struct backuparg *ba, uint64_t object, dnode_phys_t *dnp)
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{
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struct drr_object *drro = &(ba->drr->drr_u.drr_object);
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if (dnp == NULL || dnp->dn_type == DMU_OT_NONE)
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return (dump_freeobjects(ba, object, 1));
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if (ba->pending_op != PENDING_NONE) {
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if (dump_bytes(ba, ba->drr, sizeof (dmu_replay_record_t)) != 0)
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return (EINTR);
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ba->pending_op = PENDING_NONE;
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}
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/* write an OBJECT record */
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bzero(ba->drr, sizeof (dmu_replay_record_t));
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ba->drr->drr_type = DRR_OBJECT;
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drro->drr_object = object;
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drro->drr_type = dnp->dn_type;
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drro->drr_bonustype = dnp->dn_bonustype;
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drro->drr_blksz = dnp->dn_datablkszsec << SPA_MINBLOCKSHIFT;
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drro->drr_bonuslen = dnp->dn_bonuslen;
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drro->drr_checksumtype = dnp->dn_checksum;
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drro->drr_compress = dnp->dn_compress;
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drro->drr_toguid = ba->toguid;
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if (dump_bytes(ba, ba->drr, sizeof (dmu_replay_record_t)) != 0)
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return (EINTR);
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if (dump_bytes(ba, DN_BONUS(dnp), P2ROUNDUP(dnp->dn_bonuslen, 8)) != 0)
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return (EINTR);
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/* free anything past the end of the file */
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if (dump_free(ba, object, (dnp->dn_maxblkid + 1) *
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(dnp->dn_datablkszsec << SPA_MINBLOCKSHIFT), -1ULL))
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return (EINTR);
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if (ba->err)
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return (EINTR);
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return (0);
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}
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#define BP_SPAN(dnp, level) \
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(((uint64_t)dnp->dn_datablkszsec) << (SPA_MINBLOCKSHIFT + \
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(level) * (dnp->dn_indblkshift - SPA_BLKPTRSHIFT)))
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/* ARGSUSED */
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static int
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backup_cb(spa_t *spa, zilog_t *zilog, const blkptr_t *bp, arc_buf_t *pbuf,
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const zbookmark_t *zb, const dnode_phys_t *dnp, void *arg)
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{
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struct backuparg *ba = arg;
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dmu_object_type_t type = bp ? BP_GET_TYPE(bp) : DMU_OT_NONE;
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int err = 0;
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if (issig(JUSTLOOKING) && issig(FORREAL))
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return (EINTR);
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if (zb->zb_object != DMU_META_DNODE_OBJECT &&
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DMU_OBJECT_IS_SPECIAL(zb->zb_object)) {
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return (0);
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} else if (bp == NULL && zb->zb_object == DMU_META_DNODE_OBJECT) {
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uint64_t span = BP_SPAN(dnp, zb->zb_level);
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uint64_t dnobj = (zb->zb_blkid * span) >> DNODE_SHIFT;
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err = dump_freeobjects(ba, dnobj, span >> DNODE_SHIFT);
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} else if (bp == NULL) {
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uint64_t span = BP_SPAN(dnp, zb->zb_level);
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err = dump_free(ba, zb->zb_object, zb->zb_blkid * span, span);
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} else if (zb->zb_level > 0 || type == DMU_OT_OBJSET) {
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return (0);
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} else if (type == DMU_OT_DNODE) {
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dnode_phys_t *blk;
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int i;
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int blksz = BP_GET_LSIZE(bp);
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uint32_t aflags = ARC_WAIT;
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arc_buf_t *abuf;
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if (dsl_read(NULL, spa, bp, pbuf,
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arc_getbuf_func, &abuf, ZIO_PRIORITY_ASYNC_READ,
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ZIO_FLAG_CANFAIL, &aflags, zb) != 0)
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return (EIO);
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blk = abuf->b_data;
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for (i = 0; i < blksz >> DNODE_SHIFT; i++) {
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uint64_t dnobj = (zb->zb_blkid <<
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(DNODE_BLOCK_SHIFT - DNODE_SHIFT)) + i;
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err = dump_dnode(ba, dnobj, blk+i);
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if (err)
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break;
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}
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(void) arc_buf_remove_ref(abuf, &abuf);
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} else if (type == DMU_OT_SA) {
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uint32_t aflags = ARC_WAIT;
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arc_buf_t *abuf;
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int blksz = BP_GET_LSIZE(bp);
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if (arc_read_nolock(NULL, spa, bp,
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arc_getbuf_func, &abuf, ZIO_PRIORITY_ASYNC_READ,
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ZIO_FLAG_CANFAIL, &aflags, zb) != 0)
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return (EIO);
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err = dump_spill(ba, zb->zb_object, blksz, abuf->b_data);
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(void) arc_buf_remove_ref(abuf, &abuf);
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} else { /* it's a level-0 block of a regular object */
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uint32_t aflags = ARC_WAIT;
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arc_buf_t *abuf;
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int blksz = BP_GET_LSIZE(bp);
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if (dsl_read(NULL, spa, bp, pbuf,
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arc_getbuf_func, &abuf, ZIO_PRIORITY_ASYNC_READ,
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ZIO_FLAG_CANFAIL, &aflags, zb) != 0)
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return (EIO);
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err = dump_data(ba, type, zb->zb_object, zb->zb_blkid * blksz,
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blksz, bp, abuf->b_data);
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(void) arc_buf_remove_ref(abuf, &abuf);
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}
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ASSERT(err == 0 || err == EINTR);
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return (err);
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}
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int
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dmu_sendbackup(objset_t *tosnap, objset_t *fromsnap, boolean_t fromorigin,
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vnode_t *vp, offset_t *off)
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{
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dsl_dataset_t *ds = tosnap->os_dsl_dataset;
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dsl_dataset_t *fromds = fromsnap ? fromsnap->os_dsl_dataset : NULL;
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dmu_replay_record_t *drr;
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struct backuparg ba;
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int err;
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uint64_t fromtxg = 0;
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/* tosnap must be a snapshot */
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if (ds->ds_phys->ds_next_snap_obj == 0)
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return (EINVAL);
|
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|
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/* fromsnap must be an earlier snapshot from the same fs as tosnap */
|
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if (fromds && (ds->ds_dir != fromds->ds_dir ||
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fromds->ds_phys->ds_creation_txg >= ds->ds_phys->ds_creation_txg))
|
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return (EXDEV);
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|
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if (fromorigin) {
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dsl_pool_t *dp = ds->ds_dir->dd_pool;
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|
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if (fromsnap)
|
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return (EINVAL);
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|
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if (dsl_dir_is_clone(ds->ds_dir)) {
|
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rw_enter(&dp->dp_config_rwlock, RW_READER);
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err = dsl_dataset_hold_obj(dp,
|
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ds->ds_dir->dd_phys->dd_origin_obj, FTAG, &fromds);
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rw_exit(&dp->dp_config_rwlock);
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if (err)
|
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return (err);
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} else {
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fromorigin = B_FALSE;
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}
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}
|
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|
|
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drr = kmem_zalloc(sizeof (dmu_replay_record_t), KM_SLEEP);
|
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drr->drr_type = DRR_BEGIN;
|
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drr->drr_u.drr_begin.drr_magic = DMU_BACKUP_MAGIC;
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DMU_SET_STREAM_HDRTYPE(drr->drr_u.drr_begin.drr_versioninfo,
|
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DMU_SUBSTREAM);
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|
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#ifdef _KERNEL
|
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if (dmu_objset_type(tosnap) == DMU_OST_ZFS) {
|
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uint64_t version;
|
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if (zfs_get_zplprop(tosnap, ZFS_PROP_VERSION, &version) != 0)
|
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return (EINVAL);
|
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if (version == ZPL_VERSION_SA) {
|
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DMU_SET_FEATUREFLAGS(
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drr->drr_u.drr_begin.drr_versioninfo,
|
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DMU_BACKUP_FEATURE_SA_SPILL);
|
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}
|
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}
|
|
#endif
|
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|
|
drr->drr_u.drr_begin.drr_creation_time =
|
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ds->ds_phys->ds_creation_time;
|
|
drr->drr_u.drr_begin.drr_type = tosnap->os_phys->os_type;
|
|
if (fromorigin)
|
|
drr->drr_u.drr_begin.drr_flags |= DRR_FLAG_CLONE;
|
|
drr->drr_u.drr_begin.drr_toguid = ds->ds_phys->ds_guid;
|
|
if (ds->ds_phys->ds_flags & DS_FLAG_CI_DATASET)
|
|
drr->drr_u.drr_begin.drr_flags |= DRR_FLAG_CI_DATA;
|
|
|
|
if (fromds)
|
|
drr->drr_u.drr_begin.drr_fromguid = fromds->ds_phys->ds_guid;
|
|
dsl_dataset_name(ds, drr->drr_u.drr_begin.drr_toname);
|
|
|
|
if (fromds)
|
|
fromtxg = fromds->ds_phys->ds_creation_txg;
|
|
if (fromorigin)
|
|
dsl_dataset_rele(fromds, FTAG);
|
|
|
|
ba.drr = drr;
|
|
ba.vp = vp;
|
|
ba.os = tosnap;
|
|
ba.off = off;
|
|
ba.toguid = ds->ds_phys->ds_guid;
|
|
ZIO_SET_CHECKSUM(&ba.zc, 0, 0, 0, 0);
|
|
ba.pending_op = PENDING_NONE;
|
|
|
|
if (dump_bytes(&ba, drr, sizeof (dmu_replay_record_t)) != 0) {
|
|
kmem_free(drr, sizeof (dmu_replay_record_t));
|
|
return (ba.err);
|
|
}
|
|
|
|
err = traverse_dataset(ds, fromtxg, TRAVERSE_PRE | TRAVERSE_PREFETCH,
|
|
backup_cb, &ba);
|
|
|
|
if (ba.pending_op != PENDING_NONE)
|
|
if (dump_bytes(&ba, drr, sizeof (dmu_replay_record_t)) != 0)
|
|
err = EINTR;
|
|
|
|
if (err) {
|
|
if (err == EINTR && ba.err)
|
|
err = ba.err;
|
|
kmem_free(drr, sizeof (dmu_replay_record_t));
|
|
return (err);
|
|
}
|
|
|
|
bzero(drr, sizeof (dmu_replay_record_t));
|
|
drr->drr_type = DRR_END;
|
|
drr->drr_u.drr_end.drr_checksum = ba.zc;
|
|
drr->drr_u.drr_end.drr_toguid = ba.toguid;
|
|
|
|
if (dump_bytes(&ba, drr, sizeof (dmu_replay_record_t)) != 0) {
|
|
kmem_free(drr, sizeof (dmu_replay_record_t));
|
|
return (ba.err);
|
|
}
|
|
|
|
kmem_free(drr, sizeof (dmu_replay_record_t));
|
|
|
|
return (0);
|
|
}
|
|
|
|
struct recvbeginsyncarg {
|
|
const char *tofs;
|
|
const char *tosnap;
|
|
dsl_dataset_t *origin;
|
|
uint64_t fromguid;
|
|
dmu_objset_type_t type;
|
|
void *tag;
|
|
boolean_t force;
|
|
uint64_t dsflags;
|
|
char clonelastname[MAXNAMELEN];
|
|
dsl_dataset_t *ds; /* the ds to recv into; returned from the syncfunc */
|
|
cred_t *cr;
|
|
};
|
|
|
|
/* ARGSUSED */
|
|
static int
|
|
recv_new_check(void *arg1, void *arg2, dmu_tx_t *tx)
|
|
{
|
|
dsl_dir_t *dd = arg1;
|
|
struct recvbeginsyncarg *rbsa = arg2;
|
|
objset_t *mos = dd->dd_pool->dp_meta_objset;
|
|
uint64_t val;
|
|
int err;
|
|
|
|
err = zap_lookup(mos, dd->dd_phys->dd_child_dir_zapobj,
|
|
strrchr(rbsa->tofs, '/') + 1, sizeof (uint64_t), 1, &val);
|
|
|
|
if (err != ENOENT)
|
|
return (err ? err : EEXIST);
|
|
|
|
if (rbsa->origin) {
|
|
/* make sure it's a snap in the same pool */
|
|
if (rbsa->origin->ds_dir->dd_pool != dd->dd_pool)
|
|
return (EXDEV);
|
|
if (!dsl_dataset_is_snapshot(rbsa->origin))
|
|
return (EINVAL);
|
|
if (rbsa->origin->ds_phys->ds_guid != rbsa->fromguid)
|
|
return (ENODEV);
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
static void
|
|
recv_new_sync(void *arg1, void *arg2, dmu_tx_t *tx)
|
|
{
|
|
dsl_dir_t *dd = arg1;
|
|
struct recvbeginsyncarg *rbsa = arg2;
|
|
uint64_t flags = DS_FLAG_INCONSISTENT | rbsa->dsflags;
|
|
uint64_t dsobj;
|
|
|
|
/* Create and open new dataset. */
|
|
dsobj = dsl_dataset_create_sync(dd, strrchr(rbsa->tofs, '/') + 1,
|
|
rbsa->origin, flags, rbsa->cr, tx);
|
|
VERIFY(0 == dsl_dataset_own_obj(dd->dd_pool, dsobj,
|
|
B_TRUE, dmu_recv_tag, &rbsa->ds));
|
|
|
|
if (rbsa->origin == NULL) {
|
|
(void) dmu_objset_create_impl(dd->dd_pool->dp_spa,
|
|
rbsa->ds, &rbsa->ds->ds_phys->ds_bp, rbsa->type, tx);
|
|
}
|
|
|
|
spa_history_log_internal(LOG_DS_REPLAY_FULL_SYNC,
|
|
dd->dd_pool->dp_spa, tx, "dataset = %lld", dsobj);
|
|
}
|
|
|
|
/* ARGSUSED */
|
|
static int
|
|
recv_existing_check(void *arg1, void *arg2, dmu_tx_t *tx)
|
|
{
|
|
dsl_dataset_t *ds = arg1;
|
|
struct recvbeginsyncarg *rbsa = arg2;
|
|
int err;
|
|
uint64_t val;
|
|
|
|
/* must not have any changes since most recent snapshot */
|
|
if (!rbsa->force && dsl_dataset_modified_since_lastsnap(ds))
|
|
return (ETXTBSY);
|
|
|
|
/* new snapshot name must not exist */
|
|
err = zap_lookup(ds->ds_dir->dd_pool->dp_meta_objset,
|
|
ds->ds_phys->ds_snapnames_zapobj, rbsa->tosnap, 8, 1, &val);
|
|
if (err == 0)
|
|
return (EEXIST);
|
|
if (err != ENOENT)
|
|
return (err);
|
|
|
|
if (rbsa->fromguid) {
|
|
/* if incremental, most recent snapshot must match fromguid */
|
|
if (ds->ds_prev == NULL)
|
|
return (ENODEV);
|
|
|
|
/*
|
|
* most recent snapshot must match fromguid, or there are no
|
|
* changes since the fromguid one
|
|
*/
|
|
if (ds->ds_prev->ds_phys->ds_guid != rbsa->fromguid) {
|
|
uint64_t birth = ds->ds_prev->ds_phys->ds_bp.blk_birth;
|
|
uint64_t obj = ds->ds_prev->ds_phys->ds_prev_snap_obj;
|
|
while (obj != 0) {
|
|
dsl_dataset_t *snap;
|
|
err = dsl_dataset_hold_obj(ds->ds_dir->dd_pool,
|
|
obj, FTAG, &snap);
|
|
if (err)
|
|
return (ENODEV);
|
|
if (snap->ds_phys->ds_creation_txg < birth) {
|
|
dsl_dataset_rele(snap, FTAG);
|
|
return (ENODEV);
|
|
}
|
|
if (snap->ds_phys->ds_guid == rbsa->fromguid) {
|
|
dsl_dataset_rele(snap, FTAG);
|
|
break; /* it's ok */
|
|
}
|
|
obj = snap->ds_phys->ds_prev_snap_obj;
|
|
dsl_dataset_rele(snap, FTAG);
|
|
}
|
|
if (obj == 0)
|
|
return (ENODEV);
|
|
}
|
|
} else {
|
|
/* if full, most recent snapshot must be $ORIGIN */
|
|
if (ds->ds_phys->ds_prev_snap_txg >= TXG_INITIAL)
|
|
return (ENODEV);
|
|
}
|
|
|
|
/* temporary clone name must not exist */
|
|
err = zap_lookup(ds->ds_dir->dd_pool->dp_meta_objset,
|
|
ds->ds_dir->dd_phys->dd_child_dir_zapobj,
|
|
rbsa->clonelastname, 8, 1, &val);
|
|
if (err == 0)
|
|
return (EEXIST);
|
|
if (err != ENOENT)
|
|
return (err);
|
|
|
|
return (0);
|
|
}
|
|
|
|
/* ARGSUSED */
|
|
static void
|
|
recv_existing_sync(void *arg1, void *arg2, dmu_tx_t *tx)
|
|
{
|
|
dsl_dataset_t *ohds = arg1;
|
|
struct recvbeginsyncarg *rbsa = arg2;
|
|
dsl_pool_t *dp = ohds->ds_dir->dd_pool;
|
|
dsl_dataset_t *cds;
|
|
uint64_t flags = DS_FLAG_INCONSISTENT | rbsa->dsflags;
|
|
uint64_t dsobj;
|
|
|
|
/* create and open the temporary clone */
|
|
dsobj = dsl_dataset_create_sync(ohds->ds_dir, rbsa->clonelastname,
|
|
ohds->ds_prev, flags, rbsa->cr, tx);
|
|
VERIFY(0 == dsl_dataset_own_obj(dp, dsobj, B_TRUE, dmu_recv_tag, &cds));
|
|
|
|
/*
|
|
* If we actually created a non-clone, we need to create the
|
|
* objset in our new dataset.
|
|
*/
|
|
if (BP_IS_HOLE(dsl_dataset_get_blkptr(cds))) {
|
|
(void) dmu_objset_create_impl(dp->dp_spa,
|
|
cds, dsl_dataset_get_blkptr(cds), rbsa->type, tx);
|
|
}
|
|
|
|
rbsa->ds = cds;
|
|
|
|
spa_history_log_internal(LOG_DS_REPLAY_INC_SYNC,
|
|
dp->dp_spa, tx, "dataset = %lld", dsobj);
|
|
}
|
|
|
|
static boolean_t
|
|
dmu_recv_verify_features(dsl_dataset_t *ds, struct drr_begin *drrb)
|
|
{
|
|
int featureflags;
|
|
|
|
featureflags = DMU_GET_FEATUREFLAGS(drrb->drr_versioninfo);
|
|
|
|
/* Verify pool version supports SA if SA_SPILL feature set */
|
|
return ((featureflags & DMU_BACKUP_FEATURE_SA_SPILL) &&
|
|
(spa_version(dsl_dataset_get_spa(ds)) < SPA_VERSION_SA));
|
|
}
|
|
|
|
/*
|
|
* NB: callers *MUST* call dmu_recv_stream() if dmu_recv_begin()
|
|
* succeeds; otherwise we will leak the holds on the datasets.
|
|
*/
|
|
int
|
|
dmu_recv_begin(char *tofs, char *tosnap, char *top_ds, struct drr_begin *drrb,
|
|
boolean_t force, objset_t *origin, dmu_recv_cookie_t *drc)
|
|
{
|
|
int err = 0;
|
|
boolean_t byteswap;
|
|
struct recvbeginsyncarg rbsa = { 0 };
|
|
uint64_t versioninfo;
|
|
int flags;
|
|
dsl_dataset_t *ds;
|
|
|
|
if (drrb->drr_magic == DMU_BACKUP_MAGIC)
|
|
byteswap = FALSE;
|
|
else if (drrb->drr_magic == BSWAP_64(DMU_BACKUP_MAGIC))
|
|
byteswap = TRUE;
|
|
else
|
|
return (EINVAL);
|
|
|
|
rbsa.tofs = tofs;
|
|
rbsa.tosnap = tosnap;
|
|
rbsa.origin = origin ? origin->os_dsl_dataset : NULL;
|
|
rbsa.fromguid = drrb->drr_fromguid;
|
|
rbsa.type = drrb->drr_type;
|
|
rbsa.tag = FTAG;
|
|
rbsa.dsflags = 0;
|
|
rbsa.cr = CRED();
|
|
versioninfo = drrb->drr_versioninfo;
|
|
flags = drrb->drr_flags;
|
|
|
|
if (byteswap) {
|
|
rbsa.type = BSWAP_32(rbsa.type);
|
|
rbsa.fromguid = BSWAP_64(rbsa.fromguid);
|
|
versioninfo = BSWAP_64(versioninfo);
|
|
flags = BSWAP_32(flags);
|
|
}
|
|
|
|
if (DMU_GET_STREAM_HDRTYPE(versioninfo) == DMU_COMPOUNDSTREAM ||
|
|
rbsa.type >= DMU_OST_NUMTYPES ||
|
|
((flags & DRR_FLAG_CLONE) && origin == NULL))
|
|
return (EINVAL);
|
|
|
|
if (flags & DRR_FLAG_CI_DATA)
|
|
rbsa.dsflags = DS_FLAG_CI_DATASET;
|
|
|
|
bzero(drc, sizeof (dmu_recv_cookie_t));
|
|
drc->drc_drrb = drrb;
|
|
drc->drc_tosnap = tosnap;
|
|
drc->drc_top_ds = top_ds;
|
|
drc->drc_force = force;
|
|
|
|
/*
|
|
* Process the begin in syncing context.
|
|
*/
|
|
|
|
/* open the dataset we are logically receiving into */
|
|
err = dsl_dataset_hold(tofs, dmu_recv_tag, &ds);
|
|
if (err == 0) {
|
|
if (dmu_recv_verify_features(ds, drrb)) {
|
|
dsl_dataset_rele(ds, dmu_recv_tag);
|
|
return (ENOTSUP);
|
|
}
|
|
/* target fs already exists; recv into temp clone */
|
|
|
|
/* Can't recv a clone into an existing fs */
|
|
if (flags & DRR_FLAG_CLONE) {
|
|
dsl_dataset_rele(ds, dmu_recv_tag);
|
|
return (EINVAL);
|
|
}
|
|
|
|
/* must not have an incremental recv already in progress */
|
|
if (!mutex_tryenter(&ds->ds_recvlock)) {
|
|
dsl_dataset_rele(ds, dmu_recv_tag);
|
|
return (EBUSY);
|
|
}
|
|
|
|
/* tmp clone name is: tofs/%tosnap" */
|
|
(void) snprintf(rbsa.clonelastname, sizeof (rbsa.clonelastname),
|
|
"%%%s", tosnap);
|
|
rbsa.force = force;
|
|
err = dsl_sync_task_do(ds->ds_dir->dd_pool,
|
|
recv_existing_check, recv_existing_sync, ds, &rbsa, 5);
|
|
if (err) {
|
|
mutex_exit(&ds->ds_recvlock);
|
|
dsl_dataset_rele(ds, dmu_recv_tag);
|
|
return (err);
|
|
}
|
|
drc->drc_logical_ds = ds;
|
|
drc->drc_real_ds = rbsa.ds;
|
|
} else if (err == ENOENT) {
|
|
/* target fs does not exist; must be a full backup or clone */
|
|
char *cp;
|
|
|
|
/*
|
|
* If it's a non-clone incremental, we are missing the
|
|
* target fs, so fail the recv.
|
|
*/
|
|
if (rbsa.fromguid && !(flags & DRR_FLAG_CLONE))
|
|
return (ENOENT);
|
|
|
|
/* Open the parent of tofs */
|
|
cp = strrchr(tofs, '/');
|
|
*cp = '\0';
|
|
err = dsl_dataset_hold(tofs, FTAG, &ds);
|
|
*cp = '/';
|
|
if (err)
|
|
return (err);
|
|
|
|
if (dmu_recv_verify_features(ds, drrb)) {
|
|
dsl_dataset_rele(ds, FTAG);
|
|
return (ENOTSUP);
|
|
}
|
|
|
|
err = dsl_sync_task_do(ds->ds_dir->dd_pool,
|
|
recv_new_check, recv_new_sync, ds->ds_dir, &rbsa, 5);
|
|
dsl_dataset_rele(ds, FTAG);
|
|
if (err)
|
|
return (err);
|
|
drc->drc_logical_ds = drc->drc_real_ds = rbsa.ds;
|
|
drc->drc_newfs = B_TRUE;
|
|
}
|
|
|
|
return (err);
|
|
}
|
|
|
|
struct restorearg {
|
|
int err;
|
|
int byteswap;
|
|
vnode_t *vp;
|
|
char *buf;
|
|
uint64_t voff;
|
|
int bufsize; /* amount of memory allocated for buf */
|
|
zio_cksum_t cksum;
|
|
avl_tree_t *guid_to_ds_map;
|
|
};
|
|
|
|
typedef struct guid_map_entry {
|
|
uint64_t guid;
|
|
dsl_dataset_t *gme_ds;
|
|
avl_node_t avlnode;
|
|
} guid_map_entry_t;
|
|
|
|
static int
|
|
guid_compare(const void *arg1, const void *arg2)
|
|
{
|
|
const guid_map_entry_t *gmep1 = arg1;
|
|
const guid_map_entry_t *gmep2 = arg2;
|
|
|
|
if (gmep1->guid < gmep2->guid)
|
|
return (-1);
|
|
else if (gmep1->guid > gmep2->guid)
|
|
return (1);
|
|
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)
|
|
{
|
|
avl_tree_t *ca = arg;
|
|
void *cookie = NULL;
|
|
guid_map_entry_t *gmep;
|
|
|
|
while ((gmep = avl_destroy_nodes(ca, &cookie)) != NULL) {
|
|
dsl_dataset_rele(gmep->gme_ds, ca);
|
|
kmem_free(gmep, sizeof (guid_map_entry_t));
|
|
}
|
|
avl_destroy(ca);
|
|
kmem_free(ca, sizeof (avl_tree_t));
|
|
}
|
|
|
|
static void *
|
|
restore_read(struct restorearg *ra, int len)
|
|
{
|
|
void *rv;
|
|
int done = 0;
|
|
|
|
/* some things will require 8-byte alignment, so everything must */
|
|
ASSERT3U(len % 8, ==, 0);
|
|
|
|
while (done < len) {
|
|
ssize_t resid;
|
|
|
|
ra->err = vn_rdwr(UIO_READ, ra->vp,
|
|
(caddr_t)ra->buf + done, len - done,
|
|
ra->voff, UIO_SYSSPACE, FAPPEND,
|
|
RLIM64_INFINITY, CRED(), &resid);
|
|
|
|
if (resid == len - done)
|
|
ra->err = EINVAL;
|
|
ra->voff += len - done - resid;
|
|
done = len - resid;
|
|
if (ra->err)
|
|
return (NULL);
|
|
}
|
|
|
|
ASSERT3U(done, ==, len);
|
|
rv = ra->buf;
|
|
if (ra->byteswap)
|
|
fletcher_4_incremental_byteswap(rv, len, &ra->cksum);
|
|
else
|
|
fletcher_4_incremental_native(rv, len, &ra->cksum);
|
|
return (rv);
|
|
}
|
|
|
|
static void
|
|
backup_byteswap(dmu_replay_record_t *drr)
|
|
{
|
|
#define DO64(X) (drr->drr_u.X = BSWAP_64(drr->drr_u.X))
|
|
#define DO32(X) (drr->drr_u.X = BSWAP_32(drr->drr_u.X))
|
|
drr->drr_type = BSWAP_32(drr->drr_type);
|
|
drr->drr_payloadlen = BSWAP_32(drr->drr_payloadlen);
|
|
switch (drr->drr_type) {
|
|
case DRR_BEGIN:
|
|
DO64(drr_begin.drr_magic);
|
|
DO64(drr_begin.drr_versioninfo);
|
|
DO64(drr_begin.drr_creation_time);
|
|
DO32(drr_begin.drr_type);
|
|
DO32(drr_begin.drr_flags);
|
|
DO64(drr_begin.drr_toguid);
|
|
DO64(drr_begin.drr_fromguid);
|
|
break;
|
|
case DRR_OBJECT:
|
|
DO64(drr_object.drr_object);
|
|
/* DO64(drr_object.drr_allocation_txg); */
|
|
DO32(drr_object.drr_type);
|
|
DO32(drr_object.drr_bonustype);
|
|
DO32(drr_object.drr_blksz);
|
|
DO32(drr_object.drr_bonuslen);
|
|
DO64(drr_object.drr_toguid);
|
|
break;
|
|
case DRR_FREEOBJECTS:
|
|
DO64(drr_freeobjects.drr_firstobj);
|
|
DO64(drr_freeobjects.drr_numobjs);
|
|
DO64(drr_freeobjects.drr_toguid);
|
|
break;
|
|
case DRR_WRITE:
|
|
DO64(drr_write.drr_object);
|
|
DO32(drr_write.drr_type);
|
|
DO64(drr_write.drr_offset);
|
|
DO64(drr_write.drr_length);
|
|
DO64(drr_write.drr_toguid);
|
|
DO64(drr_write.drr_key.ddk_cksum.zc_word[0]);
|
|
DO64(drr_write.drr_key.ddk_cksum.zc_word[1]);
|
|
DO64(drr_write.drr_key.ddk_cksum.zc_word[2]);
|
|
DO64(drr_write.drr_key.ddk_cksum.zc_word[3]);
|
|
DO64(drr_write.drr_key.ddk_prop);
|
|
break;
|
|
case DRR_WRITE_BYREF:
|
|
DO64(drr_write_byref.drr_object);
|
|
DO64(drr_write_byref.drr_offset);
|
|
DO64(drr_write_byref.drr_length);
|
|
DO64(drr_write_byref.drr_toguid);
|
|
DO64(drr_write_byref.drr_refguid);
|
|
DO64(drr_write_byref.drr_refobject);
|
|
DO64(drr_write_byref.drr_refoffset);
|
|
DO64(drr_write_byref.drr_key.ddk_cksum.zc_word[0]);
|
|
DO64(drr_write_byref.drr_key.ddk_cksum.zc_word[1]);
|
|
DO64(drr_write_byref.drr_key.ddk_cksum.zc_word[2]);
|
|
DO64(drr_write_byref.drr_key.ddk_cksum.zc_word[3]);
|
|
DO64(drr_write_byref.drr_key.ddk_prop);
|
|
break;
|
|
case DRR_FREE:
|
|
DO64(drr_free.drr_object);
|
|
DO64(drr_free.drr_offset);
|
|
DO64(drr_free.drr_length);
|
|
DO64(drr_free.drr_toguid);
|
|
break;
|
|
case DRR_SPILL:
|
|
DO64(drr_spill.drr_object);
|
|
DO64(drr_spill.drr_length);
|
|
DO64(drr_spill.drr_toguid);
|
|
break;
|
|
case DRR_END:
|
|
DO64(drr_end.drr_checksum.zc_word[0]);
|
|
DO64(drr_end.drr_checksum.zc_word[1]);
|
|
DO64(drr_end.drr_checksum.zc_word[2]);
|
|
DO64(drr_end.drr_checksum.zc_word[3]);
|
|
DO64(drr_end.drr_toguid);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
#undef DO64
|
|
#undef DO32
|
|
}
|
|
|
|
static int
|
|
restore_object(struct restorearg *ra, objset_t *os, struct drr_object *drro)
|
|
{
|
|
int err;
|
|
dmu_tx_t *tx;
|
|
void *data = NULL;
|
|
|
|
if (drro->drr_type == DMU_OT_NONE ||
|
|
drro->drr_type >= DMU_OT_NUMTYPES ||
|
|
drro->drr_bonustype >= DMU_OT_NUMTYPES ||
|
|
drro->drr_checksumtype >= ZIO_CHECKSUM_FUNCTIONS ||
|
|
drro->drr_compress >= ZIO_COMPRESS_FUNCTIONS ||
|
|
P2PHASE(drro->drr_blksz, SPA_MINBLOCKSIZE) ||
|
|
drro->drr_blksz < SPA_MINBLOCKSIZE ||
|
|
drro->drr_blksz > SPA_MAXBLOCKSIZE ||
|
|
drro->drr_bonuslen > DN_MAX_BONUSLEN) {
|
|
return (EINVAL);
|
|
}
|
|
|
|
err = dmu_object_info(os, drro->drr_object, NULL);
|
|
|
|
if (err != 0 && err != ENOENT)
|
|
return (EINVAL);
|
|
|
|
if (drro->drr_bonuslen) {
|
|
data = restore_read(ra, P2ROUNDUP(drro->drr_bonuslen, 8));
|
|
if (ra->err)
|
|
return (ra->err);
|
|
}
|
|
|
|
if (err == ENOENT) {
|
|
/* currently free, want to be allocated */
|
|
tx = dmu_tx_create(os);
|
|
dmu_tx_hold_bonus(tx, DMU_NEW_OBJECT);
|
|
err = dmu_tx_assign(tx, TXG_WAIT);
|
|
if (err) {
|
|
dmu_tx_abort(tx);
|
|
return (err);
|
|
}
|
|
err = dmu_object_claim(os, drro->drr_object,
|
|
drro->drr_type, drro->drr_blksz,
|
|
drro->drr_bonustype, drro->drr_bonuslen, tx);
|
|
dmu_tx_commit(tx);
|
|
} else {
|
|
/* currently allocated, want to be allocated */
|
|
err = dmu_object_reclaim(os, drro->drr_object,
|
|
drro->drr_type, drro->drr_blksz,
|
|
drro->drr_bonustype, drro->drr_bonuslen);
|
|
}
|
|
if (err) {
|
|
return (EINVAL);
|
|
}
|
|
|
|
tx = dmu_tx_create(os);
|
|
dmu_tx_hold_bonus(tx, drro->drr_object);
|
|
err = dmu_tx_assign(tx, TXG_WAIT);
|
|
if (err) {
|
|
dmu_tx_abort(tx);
|
|
return (err);
|
|
}
|
|
|
|
dmu_object_set_checksum(os, drro->drr_object, drro->drr_checksumtype,
|
|
tx);
|
|
dmu_object_set_compress(os, drro->drr_object, drro->drr_compress, tx);
|
|
|
|
if (data != NULL) {
|
|
dmu_buf_t *db;
|
|
|
|
VERIFY(0 == dmu_bonus_hold(os, drro->drr_object, FTAG, &db));
|
|
dmu_buf_will_dirty(db, tx);
|
|
|
|
ASSERT3U(db->db_size, >=, drro->drr_bonuslen);
|
|
bcopy(data, db->db_data, drro->drr_bonuslen);
|
|
if (ra->byteswap) {
|
|
dmu_ot[drro->drr_bonustype].ot_byteswap(db->db_data,
|
|
drro->drr_bonuslen);
|
|
}
|
|
dmu_buf_rele(db, FTAG);
|
|
}
|
|
dmu_tx_commit(tx);
|
|
return (0);
|
|
}
|
|
|
|
/* ARGSUSED */
|
|
static int
|
|
restore_freeobjects(struct restorearg *ra, objset_t *os,
|
|
struct drr_freeobjects *drrfo)
|
|
{
|
|
uint64_t obj;
|
|
|
|
if (drrfo->drr_firstobj + drrfo->drr_numobjs < drrfo->drr_firstobj)
|
|
return (EINVAL);
|
|
|
|
for (obj = drrfo->drr_firstobj;
|
|
obj < drrfo->drr_firstobj + drrfo->drr_numobjs;
|
|
(void) dmu_object_next(os, &obj, FALSE, 0)) {
|
|
int err;
|
|
|
|
if (dmu_object_info(os, obj, NULL) != 0)
|
|
continue;
|
|
|
|
err = dmu_free_object(os, obj);
|
|
if (err)
|
|
return (err);
|
|
}
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
restore_write(struct restorearg *ra, objset_t *os,
|
|
struct drr_write *drrw)
|
|
{
|
|
dmu_tx_t *tx;
|
|
void *data;
|
|
int err;
|
|
|
|
if (drrw->drr_offset + drrw->drr_length < drrw->drr_offset ||
|
|
drrw->drr_type >= DMU_OT_NUMTYPES)
|
|
return (EINVAL);
|
|
|
|
data = restore_read(ra, drrw->drr_length);
|
|
if (data == NULL)
|
|
return (ra->err);
|
|
|
|
if (dmu_object_info(os, drrw->drr_object, NULL) != 0)
|
|
return (EINVAL);
|
|
|
|
tx = dmu_tx_create(os);
|
|
|
|
dmu_tx_hold_write(tx, drrw->drr_object,
|
|
drrw->drr_offset, drrw->drr_length);
|
|
err = dmu_tx_assign(tx, TXG_WAIT);
|
|
if (err) {
|
|
dmu_tx_abort(tx);
|
|
return (err);
|
|
}
|
|
if (ra->byteswap)
|
|
dmu_ot[drrw->drr_type].ot_byteswap(data, drrw->drr_length);
|
|
dmu_write(os, drrw->drr_object,
|
|
drrw->drr_offset, drrw->drr_length, data, tx);
|
|
dmu_tx_commit(tx);
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Handle a DRR_WRITE_BYREF record. This record is used in dedup'ed
|
|
* streams to refer to a copy of the data that is already on the
|
|
* system because it came in earlier in the stream. This function
|
|
* finds the earlier copy of the data, and uses that copy instead of
|
|
* data from the stream to fulfill this write.
|
|
*/
|
|
static int
|
|
restore_write_byref(struct restorearg *ra, objset_t *os,
|
|
struct drr_write_byref *drrwbr)
|
|
{
|
|
dmu_tx_t *tx;
|
|
int err;
|
|
guid_map_entry_t gmesrch;
|
|
guid_map_entry_t *gmep;
|
|
avl_index_t where;
|
|
objset_t *ref_os = NULL;
|
|
dmu_buf_t *dbp;
|
|
|
|
if (drrwbr->drr_offset + drrwbr->drr_length < drrwbr->drr_offset)
|
|
return (EINVAL);
|
|
|
|
/*
|
|
* If the GUID of the referenced dataset is different from the
|
|
* GUID of the target dataset, find the referenced dataset.
|
|
*/
|
|
if (drrwbr->drr_toguid != drrwbr->drr_refguid) {
|
|
gmesrch.guid = drrwbr->drr_refguid;
|
|
if ((gmep = avl_find(ra->guid_to_ds_map, &gmesrch,
|
|
&where)) == NULL) {
|
|
return (EINVAL);
|
|
}
|
|
if (dmu_objset_from_ds(gmep->gme_ds, &ref_os))
|
|
return (EINVAL);
|
|
} else {
|
|
ref_os = os;
|
|
}
|
|
|
|
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);
|
|
|
|
dmu_tx_hold_write(tx, drrwbr->drr_object,
|
|
drrwbr->drr_offset, drrwbr->drr_length);
|
|
err = dmu_tx_assign(tx, TXG_WAIT);
|
|
if (err) {
|
|
dmu_tx_abort(tx);
|
|
return (err);
|
|
}
|
|
dmu_write(os, drrwbr->drr_object,
|
|
drrwbr->drr_offset, drrwbr->drr_length, dbp->db_data, tx);
|
|
dmu_buf_rele(dbp, FTAG);
|
|
dmu_tx_commit(tx);
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
restore_spill(struct restorearg *ra, objset_t *os, struct drr_spill *drrs)
|
|
{
|
|
dmu_tx_t *tx;
|
|
void *data;
|
|
dmu_buf_t *db, *db_spill;
|
|
int err;
|
|
|
|
if (drrs->drr_length < SPA_MINBLOCKSIZE ||
|
|
drrs->drr_length > SPA_MAXBLOCKSIZE)
|
|
return (EINVAL);
|
|
|
|
data = restore_read(ra, drrs->drr_length);
|
|
if (data == NULL)
|
|
return (ra->err);
|
|
|
|
if (dmu_object_info(os, drrs->drr_object, NULL) != 0)
|
|
return (EINVAL);
|
|
|
|
VERIFY(0 == dmu_bonus_hold(os, drrs->drr_object, FTAG, &db));
|
|
if ((err = dmu_spill_hold_by_bonus(db, FTAG, &db_spill)) != 0) {
|
|
dmu_buf_rele(db, FTAG);
|
|
return (err);
|
|
}
|
|
|
|
tx = dmu_tx_create(os);
|
|
|
|
dmu_tx_hold_spill(tx, db->db_object);
|
|
|
|
err = dmu_tx_assign(tx, TXG_WAIT);
|
|
if (err) {
|
|
dmu_buf_rele(db, FTAG);
|
|
dmu_buf_rele(db_spill, FTAG);
|
|
dmu_tx_abort(tx);
|
|
return (err);
|
|
}
|
|
dmu_buf_will_dirty(db_spill, tx);
|
|
|
|
if (db_spill->db_size < drrs->drr_length)
|
|
VERIFY(0 == dbuf_spill_set_blksz(db_spill,
|
|
drrs->drr_length, tx));
|
|
bcopy(data, db_spill->db_data, drrs->drr_length);
|
|
|
|
dmu_buf_rele(db, FTAG);
|
|
dmu_buf_rele(db_spill, FTAG);
|
|
|
|
dmu_tx_commit(tx);
|
|
return (0);
|
|
}
|
|
|
|
/* ARGSUSED */
|
|
static int
|
|
restore_free(struct restorearg *ra, objset_t *os,
|
|
struct drr_free *drrf)
|
|
{
|
|
int err;
|
|
|
|
if (drrf->drr_length != -1ULL &&
|
|
drrf->drr_offset + drrf->drr_length < drrf->drr_offset)
|
|
return (EINVAL);
|
|
|
|
if (dmu_object_info(os, drrf->drr_object, NULL) != 0)
|
|
return (EINVAL);
|
|
|
|
err = dmu_free_long_range(os, drrf->drr_object,
|
|
drrf->drr_offset, drrf->drr_length);
|
|
return (err);
|
|
}
|
|
|
|
/*
|
|
* NB: callers *must* call dmu_recv_end() if this succeeds.
|
|
*/
|
|
int
|
|
dmu_recv_stream(dmu_recv_cookie_t *drc, vnode_t *vp, offset_t *voffp,
|
|
int cleanup_fd, uint64_t *action_handlep)
|
|
{
|
|
struct restorearg ra = { 0 };
|
|
dmu_replay_record_t *drr;
|
|
objset_t *os;
|
|
zio_cksum_t pcksum;
|
|
int featureflags;
|
|
|
|
if (drc->drc_drrb->drr_magic == BSWAP_64(DMU_BACKUP_MAGIC))
|
|
ra.byteswap = TRUE;
|
|
|
|
{
|
|
/* compute checksum of drr_begin record */
|
|
dmu_replay_record_t *drr;
|
|
drr = kmem_zalloc(sizeof (dmu_replay_record_t), KM_SLEEP);
|
|
|
|
drr->drr_type = DRR_BEGIN;
|
|
drr->drr_u.drr_begin = *drc->drc_drrb;
|
|
if (ra.byteswap) {
|
|
fletcher_4_incremental_byteswap(drr,
|
|
sizeof (dmu_replay_record_t), &ra.cksum);
|
|
} else {
|
|
fletcher_4_incremental_native(drr,
|
|
sizeof (dmu_replay_record_t), &ra.cksum);
|
|
}
|
|
kmem_free(drr, sizeof (dmu_replay_record_t));
|
|
}
|
|
|
|
if (ra.byteswap) {
|
|
struct drr_begin *drrb = drc->drc_drrb;
|
|
drrb->drr_magic = BSWAP_64(drrb->drr_magic);
|
|
drrb->drr_versioninfo = BSWAP_64(drrb->drr_versioninfo);
|
|
drrb->drr_creation_time = BSWAP_64(drrb->drr_creation_time);
|
|
drrb->drr_type = BSWAP_32(drrb->drr_type);
|
|
drrb->drr_toguid = BSWAP_64(drrb->drr_toguid);
|
|
drrb->drr_fromguid = BSWAP_64(drrb->drr_fromguid);
|
|
}
|
|
|
|
ra.vp = vp;
|
|
ra.voff = *voffp;
|
|
ra.bufsize = 1<<20;
|
|
ra.buf = kmem_alloc(ra.bufsize, KM_SLEEP);
|
|
|
|
/* these were verified in dmu_recv_begin */
|
|
ASSERT(DMU_GET_STREAM_HDRTYPE(drc->drc_drrb->drr_versioninfo) ==
|
|
DMU_SUBSTREAM);
|
|
ASSERT(drc->drc_drrb->drr_type < DMU_OST_NUMTYPES);
|
|
|
|
/*
|
|
* Open the objset we are modifying.
|
|
*/
|
|
VERIFY(dmu_objset_from_ds(drc->drc_real_ds, &os) == 0);
|
|
|
|
ASSERT(drc->drc_real_ds->ds_phys->ds_flags & DS_FLAG_INCONSISTENT);
|
|
|
|
featureflags = DMU_GET_FEATUREFLAGS(drc->drc_drrb->drr_versioninfo);
|
|
|
|
/* if this stream is dedup'ed, set up the avl tree for guid mapping */
|
|
if (featureflags & DMU_BACKUP_FEATURE_DEDUP) {
|
|
minor_t minor;
|
|
|
|
if (cleanup_fd == -1) {
|
|
ra.err = EBADF;
|
|
goto out;
|
|
}
|
|
ra.err = zfs_onexit_fd_hold(cleanup_fd, &minor);
|
|
if (ra.err) {
|
|
cleanup_fd = -1;
|
|
goto out;
|
|
}
|
|
|
|
if (*action_handlep == 0) {
|
|
ra.guid_to_ds_map =
|
|
kmem_alloc(sizeof (avl_tree_t), KM_SLEEP);
|
|
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;
|
|
} else {
|
|
ra.err = zfs_onexit_cb_data(minor, *action_handlep,
|
|
(void **)&ra.guid_to_ds_map);
|
|
if (ra.err)
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Read records and process them.
|
|
*/
|
|
pcksum = ra.cksum;
|
|
while (ra.err == 0 &&
|
|
NULL != (drr = restore_read(&ra, sizeof (*drr)))) {
|
|
if (issig(JUSTLOOKING) && issig(FORREAL)) {
|
|
ra.err = EINTR;
|
|
goto out;
|
|
}
|
|
|
|
if (ra.byteswap)
|
|
backup_byteswap(drr);
|
|
|
|
switch (drr->drr_type) {
|
|
case DRR_OBJECT:
|
|
{
|
|
/*
|
|
* We need to make a copy of the record header,
|
|
* because restore_{object,write} may need to
|
|
* restore_read(), which will invalidate drr.
|
|
*/
|
|
struct drr_object drro = drr->drr_u.drr_object;
|
|
ra.err = restore_object(&ra, os, &drro);
|
|
break;
|
|
}
|
|
case DRR_FREEOBJECTS:
|
|
{
|
|
struct drr_freeobjects drrfo =
|
|
drr->drr_u.drr_freeobjects;
|
|
ra.err = restore_freeobjects(&ra, os, &drrfo);
|
|
break;
|
|
}
|
|
case DRR_WRITE:
|
|
{
|
|
struct drr_write drrw = drr->drr_u.drr_write;
|
|
ra.err = restore_write(&ra, os, &drrw);
|
|
break;
|
|
}
|
|
case DRR_WRITE_BYREF:
|
|
{
|
|
struct drr_write_byref drrwbr =
|
|
drr->drr_u.drr_write_byref;
|
|
ra.err = restore_write_byref(&ra, os, &drrwbr);
|
|
break;
|
|
}
|
|
case DRR_FREE:
|
|
{
|
|
struct drr_free drrf = drr->drr_u.drr_free;
|
|
ra.err = restore_free(&ra, os, &drrf);
|
|
break;
|
|
}
|
|
case DRR_END:
|
|
{
|
|
struct drr_end drre = drr->drr_u.drr_end;
|
|
/*
|
|
* We compare against the *previous* checksum
|
|
* value, because the stored checksum is of
|
|
* everything before the DRR_END record.
|
|
*/
|
|
if (!ZIO_CHECKSUM_EQUAL(drre.drr_checksum, pcksum))
|
|
ra.err = ECKSUM;
|
|
goto out;
|
|
}
|
|
case DRR_SPILL:
|
|
{
|
|
struct drr_spill drrs = drr->drr_u.drr_spill;
|
|
ra.err = restore_spill(&ra, os, &drrs);
|
|
break;
|
|
}
|
|
default:
|
|
ra.err = EINVAL;
|
|
goto out;
|
|
}
|
|
pcksum = ra.cksum;
|
|
}
|
|
ASSERT(ra.err != 0);
|
|
|
|
out:
|
|
if ((featureflags & DMU_BACKUP_FEATURE_DEDUP) && (cleanup_fd != -1))
|
|
zfs_onexit_fd_rele(cleanup_fd);
|
|
|
|
if (ra.err != 0) {
|
|
/*
|
|
* destroy what we created, so we don't leave it in the
|
|
* inconsistent restoring state.
|
|
*/
|
|
txg_wait_synced(drc->drc_real_ds->ds_dir->dd_pool, 0);
|
|
|
|
(void) dsl_dataset_destroy(drc->drc_real_ds, dmu_recv_tag,
|
|
B_FALSE);
|
|
if (drc->drc_real_ds != drc->drc_logical_ds) {
|
|
mutex_exit(&drc->drc_logical_ds->ds_recvlock);
|
|
dsl_dataset_rele(drc->drc_logical_ds, dmu_recv_tag);
|
|
}
|
|
}
|
|
|
|
kmem_free(ra.buf, ra.bufsize);
|
|
*voffp = ra.voff;
|
|
return (ra.err);
|
|
}
|
|
|
|
struct recvendsyncarg {
|
|
char *tosnap;
|
|
uint64_t creation_time;
|
|
uint64_t toguid;
|
|
};
|
|
|
|
static int
|
|
recv_end_check(void *arg1, void *arg2, dmu_tx_t *tx)
|
|
{
|
|
dsl_dataset_t *ds = arg1;
|
|
struct recvendsyncarg *resa = arg2;
|
|
|
|
return (dsl_dataset_snapshot_check(ds, resa->tosnap, tx));
|
|
}
|
|
|
|
static void
|
|
recv_end_sync(void *arg1, void *arg2, dmu_tx_t *tx)
|
|
{
|
|
dsl_dataset_t *ds = arg1;
|
|
struct recvendsyncarg *resa = arg2;
|
|
|
|
dsl_dataset_snapshot_sync(ds, resa->tosnap, tx);
|
|
|
|
/* set snapshot's creation time and guid */
|
|
dmu_buf_will_dirty(ds->ds_prev->ds_dbuf, tx);
|
|
ds->ds_prev->ds_phys->ds_creation_time = resa->creation_time;
|
|
ds->ds_prev->ds_phys->ds_guid = resa->toguid;
|
|
ds->ds_prev->ds_phys->ds_flags &= ~DS_FLAG_INCONSISTENT;
|
|
|
|
dmu_buf_will_dirty(ds->ds_dbuf, tx);
|
|
ds->ds_phys->ds_flags &= ~DS_FLAG_INCONSISTENT;
|
|
}
|
|
|
|
static int
|
|
dmu_recv_existing_end(dmu_recv_cookie_t *drc)
|
|
{
|
|
struct recvendsyncarg resa;
|
|
dsl_dataset_t *ds = drc->drc_logical_ds;
|
|
int err;
|
|
|
|
/*
|
|
* XXX hack; seems the ds is still dirty and dsl_pool_zil_clean()
|
|
* expects it to have a ds_user_ptr (and zil), but clone_swap()
|
|
* can close it.
|
|
*/
|
|
txg_wait_synced(ds->ds_dir->dd_pool, 0);
|
|
|
|
if (dsl_dataset_tryown(ds, FALSE, dmu_recv_tag)) {
|
|
err = dsl_dataset_clone_swap(drc->drc_real_ds, ds,
|
|
drc->drc_force);
|
|
if (err)
|
|
goto out;
|
|
} else {
|
|
mutex_exit(&ds->ds_recvlock);
|
|
dsl_dataset_rele(ds, dmu_recv_tag);
|
|
(void) dsl_dataset_destroy(drc->drc_real_ds, dmu_recv_tag,
|
|
B_FALSE);
|
|
return (EBUSY);
|
|
}
|
|
|
|
resa.creation_time = drc->drc_drrb->drr_creation_time;
|
|
resa.toguid = drc->drc_drrb->drr_toguid;
|
|
resa.tosnap = drc->drc_tosnap;
|
|
|
|
err = dsl_sync_task_do(ds->ds_dir->dd_pool,
|
|
recv_end_check, recv_end_sync, ds, &resa, 3);
|
|
if (err) {
|
|
/* swap back */
|
|
(void) dsl_dataset_clone_swap(drc->drc_real_ds, ds, B_TRUE);
|
|
}
|
|
|
|
out:
|
|
mutex_exit(&ds->ds_recvlock);
|
|
dsl_dataset_disown(ds, dmu_recv_tag);
|
|
(void) dsl_dataset_destroy(drc->drc_real_ds, dmu_recv_tag, B_FALSE);
|
|
return (err);
|
|
}
|
|
|
|
static int
|
|
dmu_recv_new_end(dmu_recv_cookie_t *drc)
|
|
{
|
|
struct recvendsyncarg resa;
|
|
dsl_dataset_t *ds = drc->drc_logical_ds;
|
|
int err;
|
|
|
|
/*
|
|
* XXX hack; seems the ds is still dirty and dsl_pool_zil_clean()
|
|
* expects it to have a ds_user_ptr (and zil), but clone_swap()
|
|
* can close it.
|
|
*/
|
|
txg_wait_synced(ds->ds_dir->dd_pool, 0);
|
|
|
|
resa.creation_time = drc->drc_drrb->drr_creation_time;
|
|
resa.toguid = drc->drc_drrb->drr_toguid;
|
|
resa.tosnap = drc->drc_tosnap;
|
|
|
|
err = dsl_sync_task_do(ds->ds_dir->dd_pool,
|
|
recv_end_check, recv_end_sync, ds, &resa, 3);
|
|
if (err) {
|
|
/* clean up the fs we just recv'd into */
|
|
(void) dsl_dataset_destroy(ds, dmu_recv_tag, B_FALSE);
|
|
} else {
|
|
/* release the hold from dmu_recv_begin */
|
|
dsl_dataset_disown(ds, dmu_recv_tag);
|
|
}
|
|
return (err);
|
|
}
|
|
|
|
int
|
|
dmu_recv_end(dmu_recv_cookie_t *drc)
|
|
{
|
|
if (drc->drc_logical_ds != drc->drc_real_ds)
|
|
return (dmu_recv_existing_end(drc));
|
|
else
|
|
return (dmu_recv_new_end(drc));
|
|
}
|