da92d5cbb3
Provide a common zfs_file_* interface which can be implemented on all platforms to perform normal file access from either the kernel module or the libzpool library. This allows all non-portable vnode_t usage in the common code to be replaced by the new portable zfs_file_t. The associated vnode and kobj compatibility functions, types, and macros have been removed from the SPL. Moving forward, vnodes should only be used in platform specific code when provided by the native operating system. Reviewed-by: Sean Eric Fagan <sef@ixsystems.com> Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Reviewed-by: Igor Kozhukhov <igor@dilos.org> Reviewed-by: Jorgen Lundman <lundman@lundman.net> Signed-off-by: Matt Macy <mmacy@FreeBSD.org> Closes #9556
241 lines
6.2 KiB
C
241 lines
6.2 KiB
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;
|
|
|
|
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);
|
|
}
|