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authorPaul Dagnelie <[email protected]>2019-06-19 09:48:13 -0700
committerBrian Behlendorf <[email protected]>2019-06-19 09:48:12 -0700
commit30af21b02569ac192f52ce6e6511015f8a8d5729 (patch)
treee5f1091c2d3a6e511bbd2414782e490c18e0f59c /cmd/zdb/zdb.c
parentc1b5801bb5af0055e5f3d263beaa07026103e212 (diff)
Implement Redacted Send/Receive
Redacted send/receive allows users to send subsets of their data to a target system. One possible use case for this feature is to not transmit sensitive information to a data warehousing, test/dev, or analytics environment. Another is to save space by not replicating unimportant data within a given dataset, for example in backup tools like zrepl. Redacted send/receive is a three-stage process. First, a clone (or clones) is made of the snapshot to be sent to the target. In this clone (or clones), all unnecessary or unwanted data is removed or modified. This clone is then snapshotted to create the "redaction snapshot" (or snapshots). Second, the new zfs redact command is used to create a redaction bookmark. The redaction bookmark stores the list of blocks in a snapshot that were modified by the redaction snapshot(s). Finally, the redaction bookmark is passed as a parameter to zfs send. When sending to the snapshot that was redacted, the redaction bookmark is used to filter out blocks that contain sensitive or unwanted information, and those blocks are not included in the send stream. When sending from the redaction bookmark, the blocks it contains are considered as candidate blocks in addition to those blocks in the destination snapshot that were modified since the creation_txg of the redaction bookmark. This step is necessary to allow the target to rehydrate data in the case where some blocks are accidentally or unnecessarily modified in the redaction snapshot. The changes to bookmarks to enable fast space estimation involve adding deadlists to bookmarks. There is also logic to manage the life cycles of these deadlists. The new size estimation process operates in cases where previously an accurate estimate could not be provided. In those cases, a send is performed where no data blocks are read, reducing the runtime significantly and providing a byte-accurate size estimate. Reviewed-by: Dan Kimmel <[email protected]> Reviewed-by: Matt Ahrens <[email protected]> Reviewed-by: Prashanth Sreenivasa <[email protected]> Reviewed-by: John Kennedy <[email protected]> Reviewed-by: George Wilson <[email protected]> Reviewed-by: Chris Williamson <[email protected]> Reviewed-by: Pavel Zhakarov <[email protected]> Reviewed-by: Sebastien Roy <[email protected]> Reviewed-by: Prakash Surya <[email protected]> Reviewed-by: Brian Behlendorf <[email protected]> Signed-off-by: Paul Dagnelie <[email protected]> Closes #7958
Diffstat (limited to 'cmd/zdb/zdb.c')
-rw-r--r--cmd/zdb/zdb.c282
1 files changed, 252 insertions, 30 deletions
diff --git a/cmd/zdb/zdb.c b/cmd/zdb/zdb.c
index 4b07cdb8e..3194fd082 100644
--- a/cmd/zdb/zdb.c
+++ b/cmd/zdb/zdb.c
@@ -50,11 +50,13 @@
#include <sys/dsl_dir.h>
#include <sys/dsl_dataset.h>
#include <sys/dsl_pool.h>
+#include <sys/dsl_bookmark.h>
#include <sys/dbuf.h>
#include <sys/zil.h>
#include <sys/zil_impl.h>
#include <sys/stat.h>
#include <sys/resource.h>
+#include <sys/dmu_send.h>
#include <sys/dmu_traverse.h>
#include <sys/zio_checksum.h>
#include <sys/zio_compress.h>
@@ -143,6 +145,7 @@ usage(void)
"\t\t[<poolname> [<object> ...]]\n"
"\t%s [-AdiPv] [-e [-V] [-p <path> ...]] [-U <cache>] <dataset>\n"
"\t\t[<object> ...]\n"
+ "\t%s [-v] <bookmark>\n"
"\t%s -C [-A] [-U <cache>]\n"
"\t%s -l [-Aqu] <device>\n"
"\t%s -m [-AFLPX] [-e [-V] [-p <path> ...]] [-t <txg>] "
@@ -154,7 +157,7 @@ usage(void)
"\t%s -S [-AP] [-e [-V] [-p <path> ...]] [-U <cache>] "
"<poolname>\n\n",
cmdname, cmdname, cmdname, cmdname, cmdname, cmdname, cmdname,
- cmdname, cmdname);
+ cmdname, cmdname, cmdname);
(void) fprintf(stderr, " Dataset name must include at least one "
"separator character '/' or '@'\n");
@@ -420,6 +423,43 @@ dump_uint8(objset_t *os, uint64_t object, void *data, size_t size)
static void
dump_uint64(objset_t *os, uint64_t object, void *data, size_t size)
{
+ uint64_t *arr;
+
+ if (dump_opt['d'] < 6)
+ return;
+ if (data == NULL) {
+ dmu_object_info_t doi;
+
+ VERIFY0(dmu_object_info(os, object, &doi));
+ size = doi.doi_max_offset;
+ arr = kmem_alloc(size, KM_SLEEP);
+
+ int err = dmu_read(os, object, 0, size, arr, 0);
+ if (err != 0) {
+ (void) printf("got error %u from dmu_read\n", err);
+ kmem_free(arr, size);
+ return;
+ }
+ } else {
+ arr = data;
+ }
+
+ if (size == 0) {
+ (void) printf("\t\t[]\n");
+ return;
+ }
+
+ (void) printf("\t\t[%0llx", (u_longlong_t)arr[0]);
+ for (size_t i = 1; i * sizeof (uint64_t) < size; i++) {
+ if (i % 4 != 0)
+ (void) printf(", %0llx", (u_longlong_t)arr[i]);
+ else
+ (void) printf(",\n\t\t%0llx", (u_longlong_t)arr[i]);
+ }
+ (void) printf("]\n");
+
+ if (data == NULL)
+ kmem_free(arr, size);
}
/*ARGSUSED*/
@@ -1498,6 +1538,7 @@ visit_indirect(spa_t *spa, const dnode_phys_t *dnp,
int epb = BP_GET_LSIZE(bp) >> SPA_BLKPTRSHIFT;
arc_buf_t *buf;
uint64_t fill = 0;
+ ASSERT(!BP_IS_REDACTED(bp));
err = arc_read(NULL, spa, bp, arc_getbuf_func, &buf,
ZIO_PRIORITY_ASYNC_READ, ZIO_FLAG_CANFAIL, &flags, zb);
@@ -1784,6 +1825,128 @@ dump_full_bpobj(bpobj_t *bpo, const char *name, int indent)
}
}
+static int
+dump_bookmark(dsl_pool_t *dp, char *name, boolean_t print_redact,
+ boolean_t print_list)
+{
+ int err = 0;
+ zfs_bookmark_phys_t prop;
+ objset_t *mos = dp->dp_spa->spa_meta_objset;
+ err = dsl_bookmark_lookup(dp, name, NULL, &prop);
+
+ if (err != 0) {
+ return (err);
+ }
+
+ (void) printf("\t#%s: ", strchr(name, '#') + 1);
+ (void) printf("{guid: %llx creation_txg: %llu creation_time: "
+ "%llu redaction_obj: %llu}\n", (u_longlong_t)prop.zbm_guid,
+ (u_longlong_t)prop.zbm_creation_txg,
+ (u_longlong_t)prop.zbm_creation_time,
+ (u_longlong_t)prop.zbm_redaction_obj);
+
+ IMPLY(print_list, print_redact);
+ if (!print_redact || prop.zbm_redaction_obj == 0)
+ return (0);
+
+ redaction_list_t *rl;
+ VERIFY0(dsl_redaction_list_hold_obj(dp,
+ prop.zbm_redaction_obj, FTAG, &rl));
+
+ redaction_list_phys_t *rlp = rl->rl_phys;
+ (void) printf("\tRedacted:\n\t\tProgress: ");
+ if (rlp->rlp_last_object != UINT64_MAX ||
+ rlp->rlp_last_blkid != UINT64_MAX) {
+ (void) printf("%llu %llu (incomplete)\n",
+ (u_longlong_t)rlp->rlp_last_object,
+ (u_longlong_t)rlp->rlp_last_blkid);
+ } else {
+ (void) printf("complete\n");
+ }
+ (void) printf("\t\tSnapshots: [");
+ for (unsigned int i = 0; i < rlp->rlp_num_snaps; i++) {
+ if (i > 0)
+ (void) printf(", ");
+ (void) printf("%0llu",
+ (u_longlong_t)rlp->rlp_snaps[i]);
+ }
+ (void) printf("]\n\t\tLength: %llu\n",
+ (u_longlong_t)rlp->rlp_num_entries);
+
+ if (!print_list) {
+ dsl_redaction_list_rele(rl, FTAG);
+ return (0);
+ }
+
+ if (rlp->rlp_num_entries == 0) {
+ dsl_redaction_list_rele(rl, FTAG);
+ (void) printf("\t\tRedaction List: []\n\n");
+ return (0);
+ }
+
+ redact_block_phys_t *rbp_buf;
+ uint64_t size;
+ dmu_object_info_t doi;
+
+ VERIFY0(dmu_object_info(mos, prop.zbm_redaction_obj, &doi));
+ size = doi.doi_max_offset;
+ rbp_buf = kmem_alloc(size, KM_SLEEP);
+
+ err = dmu_read(mos, prop.zbm_redaction_obj, 0, size,
+ rbp_buf, 0);
+ if (err != 0) {
+ dsl_redaction_list_rele(rl, FTAG);
+ kmem_free(rbp_buf, size);
+ return (err);
+ }
+
+ (void) printf("\t\tRedaction List: [{object: %llx, offset: "
+ "%llx, blksz: %x, count: %llx}",
+ (u_longlong_t)rbp_buf[0].rbp_object,
+ (u_longlong_t)rbp_buf[0].rbp_blkid,
+ (uint_t)(redact_block_get_size(&rbp_buf[0])),
+ (u_longlong_t)redact_block_get_count(&rbp_buf[0]));
+
+ for (size_t i = 1; i < rlp->rlp_num_entries; i++) {
+ (void) printf(",\n\t\t{object: %llx, offset: %llx, "
+ "blksz: %x, count: %llx}",
+ (u_longlong_t)rbp_buf[i].rbp_object,
+ (u_longlong_t)rbp_buf[i].rbp_blkid,
+ (uint_t)(redact_block_get_size(&rbp_buf[i])),
+ (u_longlong_t)redact_block_get_count(&rbp_buf[i]));
+ }
+ dsl_redaction_list_rele(rl, FTAG);
+ kmem_free(rbp_buf, size);
+ (void) printf("]\n\n");
+ return (0);
+}
+
+static void
+dump_bookmarks(objset_t *os, int verbosity)
+{
+ zap_cursor_t zc;
+ zap_attribute_t attr;
+ dsl_dataset_t *ds = dmu_objset_ds(os);
+ dsl_pool_t *dp = spa_get_dsl(os->os_spa);
+ objset_t *mos = os->os_spa->spa_meta_objset;
+ if (verbosity < 4)
+ return;
+ dsl_pool_config_enter(dp, FTAG);
+
+ for (zap_cursor_init(&zc, mos, ds->ds_bookmarks_obj);
+ zap_cursor_retrieve(&zc, &attr) == 0;
+ zap_cursor_advance(&zc)) {
+ char osname[ZFS_MAX_DATASET_NAME_LEN];
+ char buf[ZFS_MAX_DATASET_NAME_LEN];
+ dmu_objset_name(os, osname);
+ VERIFY0(snprintf(buf, sizeof (buf), "%s#%s", osname,
+ attr.za_name));
+ (void) dump_bookmark(dp, buf, verbosity >= 5, verbosity >= 6);
+ }
+ zap_cursor_fini(&zc);
+ dsl_pool_config_exit(dp, FTAG);
+}
+
static void
bpobj_count_refd(bpobj_t *bpo)
{
@@ -1886,19 +2049,26 @@ static objset_t *sa_os = NULL;
static sa_attr_type_t *sa_attr_table = NULL;
static int
-open_objset(const char *path, dmu_objset_type_t type, void *tag, objset_t **osp)
+open_objset(const char *path, void *tag, objset_t **osp)
{
int err;
uint64_t sa_attrs = 0;
uint64_t version = 0;
VERIFY3P(sa_os, ==, NULL);
- err = dmu_objset_own(path, type, B_TRUE, B_FALSE, tag, osp);
+ /*
+ * We can't own an objset if it's redacted. Therefore, we do this
+ * dance: hold the objset, then acquire a long hold on its dataset, then
+ * release the pool (which is held as part of holding the objset).
+ */
+ err = dmu_objset_hold(path, tag, osp);
if (err != 0) {
- (void) fprintf(stderr, "failed to own dataset '%s': %s\n", path,
- strerror(err));
+ (void) fprintf(stderr, "failed to hold dataset '%s': %s\n",
+ path, strerror(err));
return (err);
}
+ dsl_dataset_long_hold(dmu_objset_ds(*osp), tag);
+ dsl_pool_rele(dmu_objset_pool(*osp), tag);
if (dmu_objset_type(*osp) == DMU_OST_ZFS && !(*osp)->os_encrypted) {
(void) zap_lookup(*osp, MASTER_NODE_OBJ, ZPL_VERSION_STR,
@@ -1912,7 +2082,8 @@ open_objset(const char *path, dmu_objset_type_t type, void *tag, objset_t **osp)
if (err != 0) {
(void) fprintf(stderr, "sa_setup failed: %s\n",
strerror(err));
- dmu_objset_disown(*osp, B_FALSE, tag);
+ dsl_dataset_long_rele(dmu_objset_ds(*osp), tag);
+ dsl_dataset_rele(dmu_objset_ds(*osp), tag);
*osp = NULL;
}
}
@@ -1927,7 +2098,8 @@ close_objset(objset_t *os, void *tag)
VERIFY3P(os, ==, sa_os);
if (os->os_sa != NULL)
sa_tear_down(os);
- dmu_objset_disown(os, B_FALSE, tag);
+ dsl_dataset_long_rele(dmu_objset_ds(os), tag);
+ dsl_dataset_rele(dmu_objset_ds(os), tag);
sa_attr_table = NULL;
sa_os = NULL;
}
@@ -2205,8 +2377,8 @@ static object_viewer_t *object_viewer[DMU_OT_NUMTYPES + 1] = {
};
static void
-dump_object(objset_t *os, uint64_t object, int verbosity, int *print_header,
- uint64_t *dnode_slots_used)
+dump_object(objset_t *os, uint64_t object, int verbosity,
+ boolean_t *print_header, uint64_t *dnode_slots_used)
{
dmu_buf_t *db = NULL;
dmu_object_info_t doi;
@@ -2325,7 +2497,7 @@ dump_object(objset_t *os, uint64_t object, int verbosity, int *print_header,
(void) printf("\t\t(object encrypted)\n");
}
- *print_header = 1;
+ *print_header = B_TRUE;
}
if (verbosity >= 5)
@@ -2396,6 +2568,7 @@ count_ds_mos_objects(dsl_dataset_t *ds)
mos_obj_refd(dsl_dataset_phys(ds)->ds_props_obj);
mos_obj_refd(dsl_dataset_phys(ds)->ds_userrefs_obj);
mos_obj_refd(dsl_dataset_phys(ds)->ds_snapnames_zapobj);
+ mos_obj_refd(ds->ds_bookmarks_obj);
if (!dsl_dataset_is_snapshot(ds)) {
count_dir_mos_objects(ds->ds_dir);
@@ -2416,7 +2589,7 @@ dump_dir(objset_t *os)
char osname[ZFS_MAX_DATASET_NAME_LEN];
const char *type = "UNKNOWN";
int verbosity = dump_opt['d'];
- int print_header = 1;
+ boolean_t print_header;
unsigned i;
int error;
uint64_t total_slots_used = 0;
@@ -2430,6 +2603,8 @@ dump_dir(objset_t *os)
dmu_objset_fast_stat(os, &dds);
dsl_pool_config_exit(dmu_objset_pool(os), FTAG);
+ print_header = B_TRUE;
+
if (dds.dds_type < DMU_OST_NUMTYPES)
type = objset_types[dds.dds_type];
@@ -2464,9 +2639,10 @@ dump_dir(objset_t *os)
(dds.dds_inconsistent) ? " (inconsistent)" : "");
if (zopt_objects != 0) {
- for (i = 0; i < zopt_objects; i++)
+ for (i = 0; i < zopt_objects; i++) {
dump_object(os, zopt_object[i], verbosity,
&print_header, NULL);
+ }
(void) printf("\n");
return;
}
@@ -2485,6 +2661,9 @@ dump_dir(objset_t *os)
count_ds_mos_objects(ds);
}
+ if (dmu_objset_ds(os) != NULL)
+ dump_bookmarks(os, verbosity);
+
if (verbosity < 2)
return;
@@ -2962,7 +3141,7 @@ static int
dump_path_impl(objset_t *os, uint64_t obj, char *name)
{
int err;
- int header = 1;
+ boolean_t header = B_TRUE;
uint64_t child_obj;
char *s;
dmu_buf_t *db;
@@ -3033,7 +3212,7 @@ dump_path(char *ds, char *path)
objset_t *os;
uint64_t root_obj;
- err = open_objset(ds, DMU_OST_ZFS, FTAG, &os);
+ err = open_objset(ds, FTAG, &os);
if (err != 0)
return (err);
@@ -3041,7 +3220,7 @@ dump_path(char *ds, char *path)
if (err != 0) {
(void) fprintf(stderr, "can't lookup root znode: %s\n",
strerror(err));
- dmu_objset_disown(os, B_FALSE, FTAG);
+ close_objset(os, FTAG);
return (EINVAL);
}
@@ -3222,6 +3401,7 @@ dump_label(const char *dev)
}
static uint64_t dataset_feature_count[SPA_FEATURES];
+static uint64_t global_feature_count[SPA_FEATURES];
static uint64_t remap_deadlist_count = 0;
/*ARGSUSED*/
@@ -3232,7 +3412,7 @@ dump_one_dir(const char *dsname, void *arg)
objset_t *os;
spa_feature_t f;
- error = open_objset(dsname, DMU_OST_ANY, FTAG, &os);
+ error = open_objset(dsname, FTAG, &os);
if (error != 0)
return (0);
@@ -3248,6 +3428,16 @@ dump_one_dir(const char *dsname, void *arg)
remap_deadlist_count++;
}
+ for (dsl_bookmark_node_t *dbn =
+ avl_first(&dmu_objset_ds(os)->ds_bookmarks); dbn != NULL;
+ dbn = AVL_NEXT(&dmu_objset_ds(os)->ds_bookmarks, dbn)) {
+ mos_obj_refd(dbn->dbn_phys.zbm_redaction_obj);
+ if (dbn->dbn_phys.zbm_redaction_obj != 0)
+ global_feature_count[SPA_FEATURE_REDACTION_BOOKMARKS]++;
+ if (dbn->dbn_phys.zbm_flags & ZBM_FLAG_HAS_FBN)
+ global_feature_count[SPA_FEATURE_BOOKMARK_WRITTEN]++;
+ }
+
dump_dir(os);
close_objset(os, FTAG);
fuid_table_destroy();
@@ -3484,7 +3674,7 @@ zdb_blkptr_cb(spa_t *spa, zilog_t *zilog, const blkptr_t *bp,
dmu_object_type_t type;
boolean_t is_metadata;
- if (bp == NULL)
+ if (zb->zb_level == ZB_DNODE_LEVEL)
return (0);
if (dump_opt['b'] >= 5 && bp->blk_birth > 0) {
@@ -3499,7 +3689,7 @@ zdb_blkptr_cb(spa_t *spa, zilog_t *zilog, const blkptr_t *bp,
blkbuf);
}
- if (BP_IS_HOLE(bp))
+ if (BP_IS_HOLE(bp) || BP_IS_REDACTED(bp))
return (0);
type = BP_GET_TYPE(bp);
@@ -4545,7 +4735,8 @@ zdb_ddt_add_cb(spa_t *spa, zilog_t *zilog, const blkptr_t *bp,
avl_index_t where;
zdb_ddt_entry_t *zdde, zdde_search;
- if (bp == NULL || BP_IS_HOLE(bp) || BP_IS_EMBEDDED(bp))
+ if (zb->zb_level == ZB_DNODE_LEVEL || BP_IS_HOLE(bp) ||
+ BP_IS_EMBEDDED(bp))
return (0);
if (dump_opt['S'] > 1 && zb->zb_level == ZB_ROOT_LEVEL) {
@@ -5381,6 +5572,12 @@ dump_zpool(spa_t *spa)
}
dump_dtl(spa->spa_root_vdev, 0);
}
+
+ for (spa_feature_t f = 0; f < SPA_FEATURES; f++)
+ global_feature_count[f] = UINT64_MAX;
+ global_feature_count[SPA_FEATURE_REDACTION_BOOKMARKS] = 0;
+ global_feature_count[SPA_FEATURE_BOOKMARK_WRITTEN] = 0;
+
(void) dmu_objset_find(spa_name(spa), dump_one_dir,
NULL, DS_FIND_SNAPSHOTS | DS_FIND_CHILDREN);
@@ -5390,21 +5587,31 @@ dump_zpool(spa_t *spa)
for (f = 0; f < SPA_FEATURES; f++) {
uint64_t refcount;
+ uint64_t *arr;
if (!(spa_feature_table[f].fi_flags &
- ZFEATURE_FLAG_PER_DATASET) ||
- !spa_feature_is_enabled(spa, f)) {
- ASSERT0(dataset_feature_count[f]);
- continue;
+ ZFEATURE_FLAG_PER_DATASET)) {
+ if (global_feature_count[f] == UINT64_MAX)
+ continue;
+ if (!spa_feature_is_enabled(spa, f)) {
+ ASSERT0(global_feature_count[f]);
+ continue;
+ }
+ arr = global_feature_count;
+ } else {
+ if (!spa_feature_is_enabled(spa, f)) {
+ ASSERT0(dataset_feature_count[f]);
+ continue;
+ }
+ arr = dataset_feature_count;
}
if (feature_get_refcount(spa, &spa_feature_table[f],
&refcount) == ENOTSUP)
continue;
- if (dataset_feature_count[f] != refcount) {
+ if (arr[f] != refcount) {
(void) printf("%s feature refcount mismatch: "
- "%lld datasets != %lld refcount\n",
+ "%lld consumers != %lld refcount\n",
spa_feature_table[f].fi_uname,
- (longlong_t)dataset_feature_count[f],
- (longlong_t)refcount);
+ (longlong_t)arr[f], (longlong_t)refcount);
rc = 2;
} else {
(void) printf("Verified %s feature refcount "
@@ -6184,9 +6391,23 @@ main(int argc, char **argv)
FTAG, policy, NULL);
}
}
+ } else if (strpbrk(target, "#") != NULL) {
+ dsl_pool_t *dp;
+ error = dsl_pool_hold(target, FTAG, &dp);
+ if (error != 0) {
+ fatal("can't dump '%s': %s", target,
+ strerror(error));
+ }
+ error = dump_bookmark(dp, target, B_TRUE, verbose > 1);
+ dsl_pool_rele(dp, FTAG);
+ if (error != 0) {
+ fatal("can't dump '%s': %s", target,
+ strerror(error));
+ }
+ return (error);
} else {
zdb_set_skip_mmp(target);
- error = open_objset(target, DMU_OST_ANY, FTAG, &os);
+ error = open_objset(target, FTAG, &os);
if (error == 0)
spa = dmu_objset_spa(os);
}
@@ -6245,10 +6466,11 @@ main(int argc, char **argv)
free(checkpoint_target);
}
- if (os != NULL)
+ if (os != NULL) {
close_objset(os, FTAG);
- else
+ } else {
spa_close(spa, FTAG);
+ }
fuid_table_destroy();