Native Encryption for ZFS on Linux

[mirror_zfs.git] / cmd / zdb / zdb_il.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 2009 Sun Microsystems, Inc.  All rights reserved.
 * Copyright (c) 2012 Cyril Plisko. All rights reserved.
 * Use is subject to license terms.
 */

/*
 * Copyright (c) 2013, 2016 by Delphix. All rights reserved.
 */

/*
 * Print intent log header and statistics.
 */

#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <sys/zfs_context.h>
#include <sys/spa.h>
#include <sys/dmu.h>
#include <sys/stat.h>
#include <sys/resource.h>
#include <sys/zil.h>
#include <sys/zil_impl.h>
#include <sys/abd.h>

extern uint8_t dump_opt[256];

static char prefix[4] = "\t\t\t";

static void
print_log_bp(const blkptr_t *bp, const char *prefix)
{
        char blkbuf[BP_SPRINTF_LEN];

        snprintf_blkptr(blkbuf, sizeof (blkbuf), bp);
        (void) printf("%s%s\n", prefix, blkbuf);
}

/* ARGSUSED */
static void
zil_prt_rec_create(zilog_t *zilog, int txtype, lr_create_t *lr)
{
        time_t crtime = lr->lr_crtime[0];
        char *name, *link;
        lr_attr_t *lrattr;

        name = (char *)(lr + 1);

        if (lr->lr_common.lrc_txtype == TX_CREATE_ATTR ||
            lr->lr_common.lrc_txtype == TX_MKDIR_ATTR) {
                lrattr = (lr_attr_t *)(lr + 1);
                name += ZIL_XVAT_SIZE(lrattr->lr_attr_masksize);
        }

        if (txtype == TX_SYMLINK) {
                link = name + strlen(name) + 1;
                (void) printf("%s%s -> %s\n", prefix, name, link);
        } else if (txtype != TX_MKXATTR) {
                (void) printf("%s%s\n", prefix, name);
        }

        (void) printf("%s%s", prefix, ctime(&crtime));
        (void) printf("%sdoid %llu, foid %llu, slots %llu, mode %llo\n", prefix,
            (u_longlong_t)lr->lr_doid,
            (u_longlong_t)LR_FOID_GET_OBJ(lr->lr_foid),
            (u_longlong_t)LR_FOID_GET_SLOTS(lr->lr_foid),
            (longlong_t)lr->lr_mode);
        (void) printf("%suid %llu, gid %llu, gen %llu, rdev 0x%llx\n", prefix,
            (u_longlong_t)lr->lr_uid, (u_longlong_t)lr->lr_gid,
            (u_longlong_t)lr->lr_gen, (u_longlong_t)lr->lr_rdev);
}

/* ARGSUSED */
static void
zil_prt_rec_remove(zilog_t *zilog, int txtype, lr_remove_t *lr)
{
        (void) printf("%sdoid %llu, name %s\n", prefix,
            (u_longlong_t)lr->lr_doid, (char *)(lr + 1));
}

/* ARGSUSED */
static void
zil_prt_rec_link(zilog_t *zilog, int txtype, lr_link_t *lr)
{
        (void) printf("%sdoid %llu, link_obj %llu, name %s\n", prefix,
            (u_longlong_t)lr->lr_doid, (u_longlong_t)lr->lr_link_obj,
            (char *)(lr + 1));
}

/* ARGSUSED */
static void
zil_prt_rec_rename(zilog_t *zilog, int txtype, lr_rename_t *lr)
{
        char *snm = (char *)(lr + 1);
        char *tnm = snm + strlen(snm) + 1;

        (void) printf("%ssdoid %llu, tdoid %llu\n", prefix,
            (u_longlong_t)lr->lr_sdoid, (u_longlong_t)lr->lr_tdoid);
        (void) printf("%ssrc %s tgt %s\n", prefix, snm, tnm);
}

/* ARGSUSED */
static int
zil_prt_rec_write_cb(void *data, size_t len, void *unused)
{
        char *cdata = data;
        int i;

        for (i = 0; i < len; i++) {
                if (isprint(*cdata))
                        (void) printf("%c ", *cdata);
                else
                        (void) printf("%2X", *cdata);
                cdata++;
        }
        return (0);
}

/* ARGSUSED */
static void
zil_prt_rec_write(zilog_t *zilog, int txtype, lr_write_t *lr)
{
        abd_t *data;
        blkptr_t *bp = &lr->lr_blkptr;
        zbookmark_phys_t zb;
        int verbose = MAX(dump_opt['d'], dump_opt['i']);
        int error;

        (void) printf("%sfoid %llu, offset %llx, length %llx\n", prefix,
            (u_longlong_t)lr->lr_foid, (u_longlong_t)lr->lr_offset,
            (u_longlong_t)lr->lr_length);

        if (txtype == TX_WRITE2 || verbose < 5)
                return;

        if (lr->lr_common.lrc_reclen == sizeof (lr_write_t)) {
                (void) printf("%shas blkptr, %s\n", prefix,
                    !BP_IS_HOLE(bp) &&
                    bp->blk_birth >= spa_first_txg(zilog->zl_spa) ?
                    "will claim" : "won't claim");
                print_log_bp(bp, prefix);

                if (BP_IS_HOLE(bp)) {
                        (void) printf("\t\t\tLSIZE 0x%llx\n",
                            (u_longlong_t)BP_GET_LSIZE(bp));
                        (void) printf("%s<hole>\n", prefix);
                        return;
                }
                if (bp->blk_birth < zilog->zl_header->zh_claim_txg) {
                        (void) printf("%s<block already committed>\n", prefix);
                        return;
                }

                SET_BOOKMARK(&zb, dmu_objset_id(zilog->zl_os),
                    lr->lr_foid, ZB_ZIL_LEVEL,
                    lr->lr_offset / BP_GET_LSIZE(bp));

                data = abd_alloc(BP_GET_LSIZE(bp), B_FALSE);
                error = zio_wait(zio_read(NULL, zilog->zl_spa,
                    bp, data, BP_GET_LSIZE(bp), NULL, NULL,
                    ZIO_PRIORITY_SYNC_READ, ZIO_FLAG_CANFAIL, &zb));
                if (error)
                        goto out;
        } else {
                /* data is stored after the end of the lr_write record */
                data = abd_alloc(lr->lr_length, B_FALSE);
                abd_copy_from_buf(data, lr + 1, lr->lr_length);
        }

        (void) printf("%s", prefix);
        (void) abd_iterate_func(data,
            0, MIN(lr->lr_length, (verbose < 6 ? 20 : SPA_MAXBLOCKSIZE)),
            zil_prt_rec_write_cb, NULL);
        (void) printf("\n");

out:
        abd_free(data);
}

/* ARGSUSED */
static void
zil_prt_rec_truncate(zilog_t *zilog, int txtype, lr_truncate_t *lr)
{
        (void) printf("%sfoid %llu, offset 0x%llx, length 0x%llx\n", prefix,
            (u_longlong_t)lr->lr_foid, (longlong_t)lr->lr_offset,
            (u_longlong_t)lr->lr_length);
}

/* ARGSUSED */
static void
zil_prt_rec_setattr(zilog_t *zilog, int txtype, lr_setattr_t *lr)
{
        time_t atime = (time_t)lr->lr_atime[0];
        time_t mtime = (time_t)lr->lr_mtime[0];

        (void) printf("%sfoid %llu, mask 0x%llx\n", prefix,
            (u_longlong_t)lr->lr_foid, (u_longlong_t)lr->lr_mask);

        if (lr->lr_mask & AT_MODE) {
                (void) printf("%sAT_MODE  %llo\n", prefix,
                    (longlong_t)lr->lr_mode);
        }

        if (lr->lr_mask & AT_UID) {
                (void) printf("%sAT_UID   %llu\n", prefix,
                    (u_longlong_t)lr->lr_uid);
        }

        if (lr->lr_mask & AT_GID) {
                (void) printf("%sAT_GID   %llu\n", prefix,
                    (u_longlong_t)lr->lr_gid);
        }

        if (lr->lr_mask & AT_SIZE) {
                (void) printf("%sAT_SIZE  %llu\n", prefix,
                    (u_longlong_t)lr->lr_size);
        }

        if (lr->lr_mask & AT_ATIME) {
                (void) printf("%sAT_ATIME %llu.%09llu %s", prefix,
                    (u_longlong_t)lr->lr_atime[0],
                    (u_longlong_t)lr->lr_atime[1],
                    ctime(&atime));
        }

        if (lr->lr_mask & AT_MTIME) {
                (void) printf("%sAT_MTIME %llu.%09llu %s", prefix,
                    (u_longlong_t)lr->lr_mtime[0],
                    (u_longlong_t)lr->lr_mtime[1],
                    ctime(&mtime));
        }
}

/* ARGSUSED */
static void
zil_prt_rec_acl(zilog_t *zilog, int txtype, lr_acl_t *lr)
{
        (void) printf("%sfoid %llu, aclcnt %llu\n", prefix,
            (u_longlong_t)lr->lr_foid, (u_longlong_t)lr->lr_aclcnt);
}

typedef void (*zil_prt_rec_func_t)(zilog_t *, int, void *);
typedef struct zil_rec_info {
        zil_prt_rec_func_t      zri_print;
        char                    *zri_name;
        uint64_t                zri_count;
} zil_rec_info_t;

static zil_rec_info_t zil_rec_info[TX_MAX_TYPE] = {
        { NULL,                 "Total              " },
        { (zil_prt_rec_func_t)zil_prt_rec_create,       "TX_CREATE          " },
        { (zil_prt_rec_func_t)zil_prt_rec_create,       "TX_MKDIR           " },
        { (zil_prt_rec_func_t)zil_prt_rec_create,       "TX_MKXATTR         " },
        { (zil_prt_rec_func_t)zil_prt_rec_create,       "TX_SYMLINK         " },
        { (zil_prt_rec_func_t)zil_prt_rec_remove,       "TX_REMOVE          " },
        { (zil_prt_rec_func_t)zil_prt_rec_remove,       "TX_RMDIR           " },
        { (zil_prt_rec_func_t)zil_prt_rec_link,         "TX_LINK            " },
        { (zil_prt_rec_func_t)zil_prt_rec_rename,       "TX_RENAME          " },
        { (zil_prt_rec_func_t)zil_prt_rec_write,        "TX_WRITE           " },
        { (zil_prt_rec_func_t)zil_prt_rec_truncate,     "TX_TRUNCATE        " },
        { (zil_prt_rec_func_t)zil_prt_rec_setattr,      "TX_SETATTR         " },
        { (zil_prt_rec_func_t)zil_prt_rec_acl,          "TX_ACL_V0          " },
        { (zil_prt_rec_func_t)zil_prt_rec_acl,          "TX_ACL_ACL         " },
        { (zil_prt_rec_func_t)zil_prt_rec_create,       "TX_CREATE_ACL      " },
        { (zil_prt_rec_func_t)zil_prt_rec_create,       "TX_CREATE_ATTR     " },
        { (zil_prt_rec_func_t)zil_prt_rec_create,       "TX_CREATE_ACL_ATTR " },
        { (zil_prt_rec_func_t)zil_prt_rec_create,       "TX_MKDIR_ACL       " },
        { (zil_prt_rec_func_t)zil_prt_rec_create,       "TX_MKDIR_ATTR      " },
        { (zil_prt_rec_func_t)zil_prt_rec_create,       "TX_MKDIR_ACL_ATTR  " },
        { (zil_prt_rec_func_t)zil_prt_rec_write,        "TX_WRITE2          " },
};

/* ARGSUSED */
static int
print_log_record(zilog_t *zilog, lr_t *lr, void *arg, uint64_t claim_txg)
{
        int txtype;
        int verbose = MAX(dump_opt['d'], dump_opt['i']);

        /* reduce size of txtype to strip off TX_CI bit */
        txtype = lr->lrc_txtype;

        ASSERT(txtype != 0 && (uint_t)txtype < TX_MAX_TYPE);
        ASSERT(lr->lrc_txg);

        (void) printf("\t\t%s%s len %6llu, txg %llu, seq %llu\n",
            (lr->lrc_txtype & TX_CI) ? "CI-" : "",
            zil_rec_info[txtype].zri_name,
            (u_longlong_t)lr->lrc_reclen,
            (u_longlong_t)lr->lrc_txg,
            (u_longlong_t)lr->lrc_seq);

        if (txtype && verbose >= 3) {
                if (!zilog->zl_os->os_encrypted) {
                        zil_rec_info[txtype].zri_print(zilog, txtype, lr);
                } else {
                        (void) printf("%s(encrypted)\n", prefix);
                }
        }

        zil_rec_info[txtype].zri_count++;
        zil_rec_info[0].zri_count++;

        return (0);
}

/* ARGSUSED */
static int
print_log_block(zilog_t *zilog, blkptr_t *bp, void *arg, uint64_t claim_txg)
{
        char blkbuf[BP_SPRINTF_LEN + 10];
        int verbose = MAX(dump_opt['d'], dump_opt['i']);
        char *claim;

        if (verbose <= 3)
                return (0);

        if (verbose >= 5) {
                (void) strcpy(blkbuf, ", ");
                snprintf_blkptr(blkbuf + strlen(blkbuf),
                    sizeof (blkbuf) - strlen(blkbuf), bp);
        } else {
                blkbuf[0] = '\0';
        }

        if (claim_txg != 0)
                claim = "already claimed";
        else if (bp->blk_birth >= spa_first_txg(zilog->zl_spa))
                claim = "will claim";
        else
                claim = "won't claim";

        (void) printf("\tBlock seqno %llu, %s%s\n",
            (u_longlong_t)bp->blk_cksum.zc_word[ZIL_ZC_SEQ], claim, blkbuf);

        return (0);
}

static void
print_log_stats(int verbose)
{
        int i, w, p10;

        if (verbose > 3)
                (void) printf("\n");

        if (zil_rec_info[0].zri_count == 0)
                return;

        for (w = 1, p10 = 10; zil_rec_info[0].zri_count >= p10; p10 *= 10)
                w++;

        for (i = 0; i < TX_MAX_TYPE; i++)
                if (zil_rec_info[i].zri_count || verbose >= 3)
                        (void) printf("\t\t%s %*llu\n",
                            zil_rec_info[i].zri_name, w,
                            (u_longlong_t)zil_rec_info[i].zri_count);
        (void) printf("\n");
}

/* ARGSUSED */
void
dump_intent_log(zilog_t *zilog)
{
        const zil_header_t *zh = zilog->zl_header;
        int verbose = MAX(dump_opt['d'], dump_opt['i']);
        int i;

        if (BP_IS_HOLE(&zh->zh_log) || verbose < 1)
                return;

        (void) printf("\n    ZIL header: claim_txg %llu, "
            "claim_blk_seq %llu, claim_lr_seq %llu",
            (u_longlong_t)zh->zh_claim_txg,
            (u_longlong_t)zh->zh_claim_blk_seq,
            (u_longlong_t)zh->zh_claim_lr_seq);
        (void) printf(" replay_seq %llu, flags 0x%llx\n",
            (u_longlong_t)zh->zh_replay_seq, (u_longlong_t)zh->zh_flags);

        for (i = 0; i < TX_MAX_TYPE; i++)
                zil_rec_info[i].zri_count = 0;

        if (verbose >= 2) {
                (void) printf("\n");
                (void) zil_parse(zilog, print_log_block, print_log_record, NULL,
                    zh->zh_claim_txg, B_FALSE);
                print_log_stats(verbose);
        }
}