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📄 Makefile.in(4.57 KB)
📄 THIRDPARTYLICENSE.cityhash(1.03 KB)
📄 THIRDPARTYLICENSE.cityhash.descrip(39 B)
📄 abd.c(31.72 KB)
📄 aggsum.c(8.46 KB)
📄 arc.c(330.91 KB)
📄 blkptr.c(4.26 KB)
📄 bplist.c(2.38 KB)
📄 bpobj.c(27.82 KB)
📄 bptree.c(8.2 KB)
📄 bqueue.c(4.7 KB)
📄 btree.c(65.19 KB)
📄 dataset_kstats.c(6.32 KB)
📄 dbuf.c(141.84 KB)
📄 dbuf_stats.c(6.05 KB)
📄 ddt.c(28.01 KB)
📄 ddt_zap.c(4.38 KB)
📄 dmu.c(60.44 KB)
📄 dmu_diff.c(6.25 KB)
📄 dmu_object.c(14.73 KB)
📄 dmu_objset.c(79.38 KB)
📄 dmu_recv.c(98.69 KB)
📄 dmu_redact.c(37.09 KB)
📄 dmu_send.c(95.51 KB)
📄 dmu_traverse.c(21.98 KB)
📄 dmu_tx.c(40.13 KB)
📄 dmu_zfetch.c(13.56 KB)
📄 dnode.c(71.32 KB)
📄 dnode_sync.c(24.93 KB)
📄 dsl_bookmark.c(51.22 KB)
📄 dsl_crypt.c(78.06 KB)
📄 dsl_dataset.c(141.61 KB)
📄 dsl_deadlist.c(27.94 KB)
📄 dsl_deleg.c(19.92 KB)
📄 dsl_destroy.c(36.73 KB)
📄 dsl_dir.c(65.45 KB)
📄 dsl_pool.c(42.92 KB)
📄 dsl_prop.c(32.88 KB)
📄 dsl_scan.c(134.47 KB)
📄 dsl_synctask.c(7.94 KB)
📄 dsl_userhold.c(18.26 KB)
📄 edonr_zfs.c(3.21 KB)
📄 fm.c(39.75 KB)
📄 gzip.c(2.57 KB)
📄 hkdf.c(4.5 KB)
📄 lz4.c(26.46 KB)
📄 lzjb.c(3.85 KB)
📄 metaslab.c(190.62 KB)
📄 mmp.c(24.93 KB)
📄 multilist.c(12.21 KB)
📄 objlist.c(2.58 KB)
📄 pathname.c(2.52 KB)
📄 range_tree.c(24.9 KB)
📄 refcount.c(7.82 KB)
📄 rrwlock.c(10.82 KB)
📄 sa.c(59.23 KB)
📄 sha256.c(2.89 KB)
📄 skein_zfs.c(2.92 KB)
📄 spa.c(272.81 KB)
📄 spa_boot.c(1.28 KB)
📄 spa_checkpoint.c(21.54 KB)
📄 spa_config.c(16.97 KB)
📄 spa_errlog.c(11.35 KB)
📄 spa_history.c(17.75 KB)
📄 spa_log_spacemap.c(47.13 KB)
📄 spa_misc.c(75.4 KB)
📄 spa_stats.c(27.08 KB)
📄 space_map.c(31.45 KB)
📄 space_reftree.c(4.21 KB)
📄 txg.c(27.49 KB)
📄 uberblock.c(2.17 KB)
📄 unique.c(2.53 KB)
📄 vdev.c(143.91 KB)
📄 vdev_cache.c(11.71 KB)
📄 vdev_draid.c(96.86 KB)
📄 vdev_draid_rand.c(1.16 KB)
📄 vdev_indirect.c(60.83 KB)
📄 vdev_indirect_births.c(5.88 KB)
📄 vdev_indirect_mapping.c(18.06 KB)
📄 vdev_initialize.c(22.38 KB)
📄 vdev_label.c(57.52 KB)
📄 vdev_mirror.c(26.76 KB)
📄 vdev_missing.c(3.74 KB)
📄 vdev_queue.c(37.61 KB)
📄 vdev_raidz.c(76.09 KB)
📄 vdev_raidz_math.c(17.18 KB)
📄 vdev_raidz_math_aarch64_neon.c(112.13 KB)
📄 vdev_raidz_math_aarch64_neon_common.h(23.64 KB)
📄 vdev_raidz_math_aarch64_neonx2.c(5.39 KB)
📄 vdev_raidz_math_avx2.c(10.64 KB)
📄 vdev_raidz_math_avx512bw.c(10.93 KB)
📄 vdev_raidz_math_avx512f.c(17.9 KB)
📄 vdev_raidz_math_impl.h(34.78 KB)
📄 vdev_raidz_math_powerpc_altivec.c(213.46 KB)
📄 vdev_raidz_math_powerpc_altivec_common.h(22.62 KB)
📄 vdev_raidz_math_scalar.c(9.54 KB)
📄 vdev_raidz_math_sse2.c(25.84 KB)
📄 vdev_raidz_math_ssse3.c(118 KB)
📄 vdev_rebuild.c(34.65 KB)
📄 vdev_removal.c(72.08 KB)
📄 vdev_root.c(4.28 KB)
📄 vdev_trim.c(50.92 KB)
📄 zap.c(35.35 KB)
📄 zap_leaf.c(22.75 KB)
📄 zap_micro.c(42.18 KB)
📄 zcp.c(42.29 KB)
📄 zcp_get.c(21.01 KB)
📄 zcp_global.c(1.9 KB)
📄 zcp_iter.c(18.21 KB)
📄 zcp_set.c(2.37 KB)
📄 zcp_synctask.c(13.69 KB)
📄 zfeature.c(17.6 KB)
📄 zfs_byteswap.c(5.64 KB)
📄 zfs_fm.c(40.58 KB)
📄 zfs_fuid.c(19.69 KB)
📄 zfs_ioctl.c(195.48 KB)
📄 zfs_log.c(20.6 KB)
📄 zfs_onexit.c(5.09 KB)
📄 zfs_quota.c(12.93 KB)
📄 zfs_ratelimit.c(2.35 KB)
📄 zfs_replay.c(26.11 KB)
📄 zfs_rlock.c(20.38 KB)
📄 zfs_sa.c(13.09 KB)
📄 zfs_vnops.c(22 KB)
📄 zil.c(111.32 KB)
📄 zio.c(144.72 KB)
📄 zio_checksum.c(17.28 KB)
📄 zio_compress.c(5.92 KB)
📄 zio_inject.c(25.79 KB)
📄 zle.c(2.52 KB)
📄 zrlock.c(4.45 KB)
📄 zthr.c(16.41 KB)
📄 zvol.c(42.96 KB)

Editing: dmu_diff.c

/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */
/*
 * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
 * Copyright (c) 2012, 2018 by Delphix. All rights reserved.
 * Copyright (c) 2019, loli10K <ezomori.nozomu@gmail.com>. All rights reserved.
 */

#include <sys/dmu.h>
#include <sys/dmu_impl.h>
#include <sys/dmu_tx.h>
#include <sys/dbuf.h>
#include <sys/dnode.h>
#include <sys/zfs_context.h>
#include <sys/dmu_objset.h>
#include <sys/dmu_traverse.h>
#include <sys/dsl_dataset.h>
#include <sys/dsl_dir.h>
#include <sys/dsl_pool.h>
#include <sys/dsl_synctask.h>
#include <sys/zfs_ioctl.h>
#include <sys/zap.h>
#include <sys/zio_checksum.h>
#include <sys/zfs_znode.h>
#include <sys/zfs_file.h>

typedef struct dmu_diffarg {
	zfs_file_t *da_fp;		/* file to which we are reporting */
	offset_t *da_offp;
	int da_err;			/* error that stopped diff search */
	dmu_diff_record_t da_ddr;
} dmu_diffarg_t;

static int
write_record(dmu_diffarg_t *da)
{
	zfs_file_t *fp;
	ssize_t resid;

if (da->da_ddr.ddr_type == DDR_NONE) {
		da->da_err = 0;
		return (0);
	}

fp = da->da_fp;
	da->da_err = zfs_file_write(fp, (caddr_t)&da->da_ddr,
	    sizeof (da->da_ddr), &resid);
	*da->da_offp += sizeof (da->da_ddr);
	return (da->da_err);
}

static int
report_free_dnode_range(dmu_diffarg_t *da, uint64_t first, uint64_t last)
{
	ASSERT(first <= last);
	if (da->da_ddr.ddr_type != DDR_FREE ||
	    first != da->da_ddr.ddr_last + 1) {
		if (write_record(da) != 0)
			return (da->da_err);
		da->da_ddr.ddr_type = DDR_FREE;
		da->da_ddr.ddr_first = first;
		da->da_ddr.ddr_last = last;
		return (0);
	}
	da->da_ddr.ddr_last = last;
	return (0);
}

static int
report_dnode(dmu_diffarg_t *da, uint64_t object, dnode_phys_t *dnp)
{
	ASSERT(dnp != NULL);
	if (dnp->dn_type == DMU_OT_NONE)
		return (report_free_dnode_range(da, object, object));

if (da->da_ddr.ddr_type != DDR_INUSE ||
	    object != da->da_ddr.ddr_last + 1) {
		if (write_record(da) != 0)
			return (da->da_err);
		da->da_ddr.ddr_type = DDR_INUSE;
		da->da_ddr.ddr_first = da->da_ddr.ddr_last = object;
		return (0);
	}
	da->da_ddr.ddr_last = object;
	return (0);
}

#define	DBP_SPAN(dnp, level)				  \
	(((uint64_t)dnp->dn_datablkszsec) << (SPA_MINBLOCKSHIFT + \
	(level) * (dnp->dn_indblkshift - SPA_BLKPTRSHIFT)))

/* ARGSUSED */
static int
diff_cb(spa_t *spa, zilog_t *zilog, const blkptr_t *bp,
    const zbookmark_phys_t *zb, const dnode_phys_t *dnp, void *arg)
{
	dmu_diffarg_t *da = arg;
	int err = 0;

if (issig(JUSTLOOKING) && issig(FORREAL))
		return (SET_ERROR(EINTR));

if (zb->zb_level == ZB_DNODE_LEVEL ||
	    zb->zb_object != DMU_META_DNODE_OBJECT)
		return (0);

if (BP_IS_HOLE(bp)) {
		uint64_t span = DBP_SPAN(dnp, zb->zb_level);
		uint64_t dnobj = (zb->zb_blkid * span) >> DNODE_SHIFT;

err = report_free_dnode_range(da, dnobj,
		    dnobj + (span >> DNODE_SHIFT) - 1);
		if (err)
			return (err);
	} else if (zb->zb_level == 0) {
		dnode_phys_t *blk;
		arc_buf_t *abuf;
		arc_flags_t aflags = ARC_FLAG_WAIT;
		int epb = BP_GET_LSIZE(bp) >> DNODE_SHIFT;
		int zio_flags = ZIO_FLAG_CANFAIL;
		int i;

if (BP_IS_PROTECTED(bp))
			zio_flags |= ZIO_FLAG_RAW;

if (arc_read(NULL, spa, bp, arc_getbuf_func, &abuf,
		    ZIO_PRIORITY_ASYNC_READ, zio_flags, &aflags, zb) != 0)
			return (SET_ERROR(EIO));

blk = abuf->b_data;
		for (i = 0; i < epb; i += blk[i].dn_extra_slots + 1) {
			uint64_t dnobj = (zb->zb_blkid <<
			    (DNODE_BLOCK_SHIFT - DNODE_SHIFT)) + i;
			err = report_dnode(da, dnobj, blk+i);
			if (err)
				break;
		}
		arc_buf_destroy(abuf, &abuf);
		if (err)
			return (err);
		/* Don't care about the data blocks */
		return (TRAVERSE_VISIT_NO_CHILDREN);
	}
	return (0);
}

int
dmu_diff(const char *tosnap_name, const char *fromsnap_name,
    zfs_file_t *fp, offset_t *offp)
{
	dmu_diffarg_t da;
	dsl_dataset_t *fromsnap;
	dsl_dataset_t *tosnap;
	dsl_pool_t *dp;
	int error;
	uint64_t fromtxg;

if (strchr(tosnap_name, '@') == NULL ||
	    strchr(fromsnap_name, '@') == NULL)
		return (SET_ERROR(EINVAL));

error = dsl_pool_hold(tosnap_name, FTAG, &dp);
	if (error != 0)
		return (error);

error = dsl_dataset_hold(dp, tosnap_name, FTAG, &tosnap);
	if (error != 0) {
		dsl_pool_rele(dp, FTAG);
		return (error);
	}

error = dsl_dataset_hold(dp, fromsnap_name, FTAG, &fromsnap);
	if (error != 0) {
		dsl_dataset_rele(tosnap, FTAG);
		dsl_pool_rele(dp, FTAG);
		return (error);
	}

if (!dsl_dataset_is_before(tosnap, fromsnap, 0)) {
		dsl_dataset_rele(fromsnap, FTAG);
		dsl_dataset_rele(tosnap, FTAG);
		dsl_pool_rele(dp, FTAG);
		return (SET_ERROR(EXDEV));
	}

fromtxg = dsl_dataset_phys(fromsnap)->ds_creation_txg;
	dsl_dataset_rele(fromsnap, FTAG);

dsl_dataset_long_hold(tosnap, FTAG);
	dsl_pool_rele(dp, FTAG);

da.da_fp = fp;
	da.da_offp = offp;
	da.da_ddr.ddr_type = DDR_NONE;
	da.da_ddr.ddr_first = da.da_ddr.ddr_last = 0;
	da.da_err = 0;

/*
	 * Since zfs diff only looks at dnodes which are stored in plaintext
	 * (other than bonus buffers), we don't technically need to decrypt
	 * the dataset to perform this operation. However, the command line
	 * utility will still fail if the keys are not loaded because the
	 * dataset isn't mounted and because it will fail when it attempts to
	 * call the ZFS_IOC_OBJ_TO_STATS ioctl.
	 */
	error = traverse_dataset(tosnap, fromtxg,
	    TRAVERSE_PRE | TRAVERSE_PREFETCH_METADATA | TRAVERSE_NO_DECRYPT,
	    diff_cb, &da);

if (error != 0) {
		da.da_err = error;
	} else {
		/* we set the da.da_err we return as side-effect */
		(void) write_record(&da);
	}

dsl_dataset_long_rele(tosnap, FTAG);
	dsl_dataset_rele(tosnap, FTAG);

return (da.da_err);
}

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Editing: dmu_diff.c

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