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libzdb: Initial breakout of libzdb

Browse Source 
Step 1 in trying to slowly rip the zdb functions out of zdb.c
to allow people to play with more flexible things to leverage
zdb's functionality.

No promises on any functions or structs being stable, now or probably
in general unless someone builds a more polished abstraction, the
goal at the moment is to slowly untangle the global state usage
in zdb...

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Rich Ercolani <rincebrain@gmail.com>
Closes #15804
This commit is contained in:
Rich Ercolani 2024-02-05 13:00:41 -05:00 committed by GitHub
parent 06e25f9c4b
commit a0d3fe72bf
No known key found for this signature in database
GPG Key ID: B5690EEEBB952194
7 changed files with 184 additions and 108 deletions
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1
cmd/zdb/Makefile.am
View File

@ -10,6 +10,7 @@ zdb_SOURCES = \
%D%/zdb_il.c
zdb_LDADD = \
libzdb.la \
libzpool.la \
libzfs_core.la \
libnvpair.la

108
cmd/zdb/zdb.c
View File

@ -88,36 +88,10 @@
#include <libnvpair.h>
#include <libzutil.h>
#include <libzdb.h>
#include "zdb.h"
#define ZDB_COMPRESS_NAME(idx) ((idx) < ZIO_COMPRESS_FUNCTIONS ? \
zio_compress_table[(idx)].ci_name : "UNKNOWN")
#define ZDB_CHECKSUM_NAME(idx) ((idx) < ZIO_CHECKSUM_FUNCTIONS ? \
zio_checksum_table[(idx)].ci_name : "UNKNOWN")
#define ZDB_OT_TYPE(idx) ((idx) < DMU_OT_NUMTYPES ? (idx) : \
(idx) == DMU_OTN_ZAP_DATA || (idx) == DMU_OTN_ZAP_METADATA ? \
DMU_OT_ZAP_OTHER : \
(idx) == DMU_OTN_UINT64_DATA || (idx) == DMU_OTN_UINT64_METADATA ? \
DMU_OT_UINT64_OTHER : DMU_OT_NUMTYPES)
/* Some platforms require part of inode IDs to be remapped */
#ifdef __APPLE__
#define ZDB_MAP_OBJECT_ID(obj) INO_XNUTOZFS(obj, 2)
#else
#define ZDB_MAP_OBJECT_ID(obj) (obj)
#endif
static const char *
zdb_ot_name(dmu_object_type_t type)
{
if (type < DMU_OT_NUMTYPES)
return (dmu_ot[type].ot_name);
else if ((type & DMU_OT_NEWTYPE) &&
((type & DMU_OT_BYTESWAP_MASK) < DMU_BSWAP_NUMFUNCS))
return (dmu_ot_byteswap[type & DMU_OT_BYTESWAP_MASK].ob_name);
else
return ("UNKNOWN");
}
extern int reference_tracking_enable;
extern int zfs_recover;
@ -135,35 +109,12 @@ typedef void object_viewer_t(objset_t *, uint64_t, void *data, size_t size);
static uint64_t *zopt_metaslab = NULL;
static unsigned zopt_metaslab_args = 0;
typedef struct zopt_object_range {
uint64_t zor_obj_start;
uint64_t zor_obj_end;
uint64_t zor_flags;
} zopt_object_range_t;
static zopt_object_range_t *zopt_object_ranges = NULL;
static unsigned zopt_object_args = 0;
static int flagbits[256];
#define ZOR_FLAG_PLAIN_FILE 0x0001
#define ZOR_FLAG_DIRECTORY 0x0002
#define ZOR_FLAG_SPACE_MAP 0x0004
#define ZOR_FLAG_ZAP 0x0008
#define ZOR_FLAG_ALL_TYPES -1
#define ZOR_SUPPORTED_FLAGS (ZOR_FLAG_PLAIN_FILE | \
ZOR_FLAG_DIRECTORY | \
ZOR_FLAG_SPACE_MAP | \
ZOR_FLAG_ZAP)
#define ZDB_FLAG_CHECKSUM 0x0001
#define ZDB_FLAG_DECOMPRESS 0x0002
#define ZDB_FLAG_BSWAP 0x0004
#define ZDB_FLAG_GBH 0x0008
#define ZDB_FLAG_INDIRECT 0x0010
#define ZDB_FLAG_RAW 0x0020
#define ZDB_FLAG_PRINT_BLKPTR 0x0040
#define ZDB_FLAG_VERBOSE 0x0080
static uint64_t max_inflight_bytes = 256 * 1024 * 1024; /* 256MB */
static int leaked_objects = 0;
@ -176,62 +127,7 @@ static void mos_obj_refd_multiple(uint64_t);
static int dump_bpobj_cb(void *arg, const blkptr_t *bp, boolean_t free,
dmu_tx_t *tx);
typedef struct sublivelist_verify {
/* FREE's that haven't yet matched to an ALLOC, in one sub-livelist */
zfs_btree_t sv_pair;
/* ALLOC's without a matching FREE, accumulates across sub-livelists */
zfs_btree_t sv_leftover;
} sublivelist_verify_t;
static int
livelist_compare(const void *larg, const void *rarg)
{
const blkptr_t *l = larg;
const blkptr_t *r = rarg;
/* Sort them according to dva[0] */
uint64_t l_dva0_vdev, r_dva0_vdev;
l_dva0_vdev = DVA_GET_VDEV(&l->blk_dva[0]);
r_dva0_vdev = DVA_GET_VDEV(&r->blk_dva[0]);
if (l_dva0_vdev < r_dva0_vdev)
return (-1);
else if (l_dva0_vdev > r_dva0_vdev)
return (+1);
/* if vdevs are equal, sort by offsets. */
uint64_t l_dva0_offset;
uint64_t r_dva0_offset;
l_dva0_offset = DVA_GET_OFFSET(&l->blk_dva[0]);
r_dva0_offset = DVA_GET_OFFSET(&r->blk_dva[0]);
if (l_dva0_offset < r_dva0_offset) {
return (-1);
} else if (l_dva0_offset > r_dva0_offset) {
return (+1);
}
/*
* Since we're storing blkptrs without cancelling FREE/ALLOC pairs,
* it's possible the offsets are equal. In that case, sort by txg
*/
if (l->blk_birth < r->blk_birth) {
return (-1);
} else if (l->blk_birth > r->blk_birth) {
return (+1);
}
return (0);
}
typedef struct sublivelist_verify_block {
dva_t svb_dva;
/*
* We need this to check if the block marked as allocated
* in the livelist was freed (and potentially reallocated)
* in the metaslab spacemaps at a later TXG.
*/
uint64_t svb_allocated_txg;
} sublivelist_verify_block_t;
static void zdb_print_blkptr(const blkptr_t *bp, int flags);

1
include/Makefile.am
View File

@ -186,6 +186,7 @@ USER_H = \
libuutil.h \
libuutil_common.h \
libuutil_impl.h \
libzdb.h \
libzfs.h \
libzfs_core.h \
libzfsbootenv.h \

68
include/libzdb.h Normal file
View File

@ -0,0 +1,68 @@
#define ZDB_COMPRESS_NAME(idx) ((idx) < ZIO_COMPRESS_FUNCTIONS ? \
zio_compress_table[(idx)].ci_name : "UNKNOWN")
#define ZDB_CHECKSUM_NAME(idx) ((idx) < ZIO_CHECKSUM_FUNCTIONS ? \
zio_checksum_table[(idx)].ci_name : "UNKNOWN")
#define ZDB_OT_TYPE(idx) ((idx) < DMU_OT_NUMTYPES ? (idx) : \
(idx) == DMU_OTN_ZAP_DATA || (idx) == DMU_OTN_ZAP_METADATA ? \
DMU_OT_ZAP_OTHER : \
(idx) == DMU_OTN_UINT64_DATA || (idx) == DMU_OTN_UINT64_METADATA ? \
DMU_OT_UINT64_OTHER : DMU_OT_NUMTYPES)
/* Some platforms require part of inode IDs to be remapped */
#ifdef __APPLE__
#define ZDB_MAP_OBJECT_ID(obj) INO_XNUTOZFS(obj, 2)
#else
#define ZDB_MAP_OBJECT_ID(obj) (obj)
#endif
#define ZOR_FLAG_PLAIN_FILE 0x0001
#define ZOR_FLAG_DIRECTORY 0x0002
#define ZOR_FLAG_SPACE_MAP 0x0004
#define ZOR_FLAG_ZAP 0x0008
#define ZOR_FLAG_ALL_TYPES -1
#define ZOR_SUPPORTED_FLAGS (ZOR_FLAG_PLAIN_FILE | \
ZOR_FLAG_DIRECTORY | \
ZOR_FLAG_SPACE_MAP | \
ZOR_FLAG_ZAP)
#define ZDB_FLAG_CHECKSUM 0x0001
#define ZDB_FLAG_DECOMPRESS 0x0002
#define ZDB_FLAG_BSWAP 0x0004
#define ZDB_FLAG_GBH 0x0008
#define ZDB_FLAG_INDIRECT 0x0010
#define ZDB_FLAG_RAW 0x0020
#define ZDB_FLAG_PRINT_BLKPTR 0x0040
#define ZDB_FLAG_VERBOSE 0x0080
typedef struct zdb_ctx {
} zdb_ctx_t;
typedef struct zopt_object_range {
uint64_t zor_obj_start;
uint64_t zor_obj_end;
uint64_t zor_flags;
} zopt_object_range_t;
typedef struct sublivelist_verify {
/* FREE's that haven't yet matched to an ALLOC, in one sub-livelist */
zfs_btree_t sv_pair;
/* ALLOC's without a matching FREE, accumulates across sub-livelists */
zfs_btree_t sv_leftover;
} sublivelist_verify_t;
typedef struct sublivelist_verify_block {
dva_t svb_dva;
/*
* We need this to check if the block marked as allocated
* in the livelist was freed (and potentially reallocated)
* in the metaslab spacemaps at a later TXG.
*/
uint64_t svb_allocated_txg;
} sublivelist_verify_block_t;
const char *zdb_ot_name(dmu_object_type_t type);
int livelist_compare(const void *larg, const void *rarg);

5
lib/Makefile.am
View File

@ -9,11 +9,11 @@
# These library interfaces are subject to change at any time.
#
#
# CMDS: zhack/ztest/zdb/ zfs/zpool/zed/
# CMDS: zhack/ztest/ zfs/zpool/zed/
# raidz_{test,bench} zinject/zstream
# | |
# LIBS: | | libzfsbootenv*
# | | |
# |--libzdb--zdb | |
# | | |
# libzpool libzfs* ----------------+
# | | | \ / | | |
@ -62,6 +62,7 @@ include $(srcdir)/%D%/libspl/Makefile.am
include $(srcdir)/%D%/libtpool/Makefile.am
include $(srcdir)/%D%/libunicode/Makefile.am
include $(srcdir)/%D%/libuutil/Makefile.am
include $(srcdir)/%D%/libzdb/Makefile.am
include $(srcdir)/%D%/libzfs_core/Makefile.am
include $(srcdir)/%D%/libzfs/Makefile.am
include $(srcdir)/%D%/libzfsbootenv/Makefile.am

7
lib/libzdb/Makefile.am Normal file
View File

@ -0,0 +1,7 @@
libzdb_la_CFLAGS = $(AM_CFLAGS) $(LIBRARY_CFLAGS)
libzdb_la_CFLAGS += -fvisibility=hidden
noinst_LTLIBRARIES += libzdb.la
libzdb_la_SOURCES = \
%D%/libzdb.c

102
lib/libzdb/libzdb.c Normal file
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@ -0,0 +1,102 @@
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <ctype.h>
#include <getopt.h>
#include <openssl/evp.h>
#include <sys/zfs_context.h>
#include <sys/spa.h>
#include <sys/spa_impl.h>
#include <sys/dmu.h>
#include <sys/zap.h>
#include <sys/fs/zfs.h>
#include <sys/zfs_znode.h>
#include <sys/zfs_sa.h>
#include <sys/sa.h>
#include <sys/sa_impl.h>
#include <sys/vdev.h>
#include <sys/vdev_impl.h>
#include <sys/metaslab_impl.h>
#include <sys/dmu_objset.h>
#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>
#include <sys/zfs_fuid.h>
#include <sys/arc.h>
#include <sys/arc_impl.h>
#include <sys/ddt.h>
#include <sys/zfeature.h>
#include <sys/abd.h>
#include <sys/blkptr.h>
#include <sys/dsl_crypt.h>
#include <sys/dsl_scan.h>
#include <sys/btree.h>
#include <sys/brt.h>
#include <sys/brt_impl.h>
#include <zfs_comutil.h>
#include <sys/zstd/zstd.h>
#include <libnvpair.h>
#include <libzutil.h>
#include <libzdb.h>
const char *
zdb_ot_name(dmu_object_type_t type)
{
if (type < DMU_OT_NUMTYPES)
return (dmu_ot[type].ot_name);
else if ((type & DMU_OT_NEWTYPE) &&
((type & DMU_OT_BYTESWAP_MASK) < DMU_BSWAP_NUMFUNCS))
return (dmu_ot_byteswap[type & DMU_OT_BYTESWAP_MASK].ob_name);
else
return ("UNKNOWN");
}
int
livelist_compare(const void *larg, const void *rarg)
{
const blkptr_t *l = larg;
const blkptr_t *r = rarg;
/* Sort them according to dva[0] */
uint64_t l_dva0_vdev, r_dva0_vdev;
l_dva0_vdev = DVA_GET_VDEV(&l->blk_dva[0]);
r_dva0_vdev = DVA_GET_VDEV(&r->blk_dva[0]);
if (l_dva0_vdev < r_dva0_vdev)
return (-1);
else if (l_dva0_vdev > r_dva0_vdev)
return (+1);
/* if vdevs are equal, sort by offsets. */
uint64_t l_dva0_offset;
uint64_t r_dva0_offset;
l_dva0_offset = DVA_GET_OFFSET(&l->blk_dva[0]);
r_dva0_offset = DVA_GET_OFFSET(&r->blk_dva[0]);
if (l_dva0_offset < r_dva0_offset) {
return (-1);
} else if (l_dva0_offset > r_dva0_offset) {
return (+1);
}
/*
* Since we're storing blkptrs without cancelling FREE/ALLOC pairs,
* it's possible the offsets are equal. In that case, sort by txg
*/
if (l->blk_birth < r->blk_birth) {
return (-1);
} else if (l->blk_birth > r->blk_birth) {
return (+1);
}
return (0);
}