From 5f023415af5aa5803be6fbd6e2760782f4a6ad53 Mon Sep 17 00:00:00 2001 From: delphij Date: Tue, 1 Jul 2014 08:20:34 +0000 Subject: MFV r267568: 4891 want zdb option to dump all metadata illumos/illumos-gate@df15e419cb7359ba56ddddab9045e438d89e7cbc MFC after: 2 weeks --- cddl/contrib/opensolaris/cmd/zdb/zdb.8 | 13 ++++++++++-- cddl/contrib/opensolaris/cmd/zdb/zdb.c | 17 ++++++++++----- .../opensolaris/lib/libzpool/common/kernel.c | 24 ++++++++++++++++++++++ .../lib/libzpool/common/sys/zfs_context.h | 2 ++ 4 files changed, 49 insertions(+), 7 deletions(-) (limited to 'cddl/contrib') diff --git a/cddl/contrib/opensolaris/cmd/zdb/zdb.8 b/cddl/contrib/opensolaris/cmd/zdb/zdb.8 index e59f370..41b99ac 100644 --- a/cddl/contrib/opensolaris/cmd/zdb/zdb.8 +++ b/cddl/contrib/opensolaris/cmd/zdb/zdb.8 @@ -14,12 +14,12 @@ .\" .\" Copyright 2012, Richard Lowe. .\" Copyright (c) 2012, Marcelo Araujo . -.\" Copyright (c) 2012 by Delphix. All rights reserved. +.\" Copyright (c) 2012, 2014 by Delphix. All rights reserved. .\" All Rights Reserved. .\" .\" $FreeBSD$ .\" -.Dd March 20, 2014 +.Dd July 1, 2014 .Dt ZDB 8 .Os .Sh NAME @@ -32,6 +32,7 @@ .Op Fl t Ar txg .Op Fl U Ar cache .Op Fl M Ar inflight I/Os +.Op Fl x Ar dumpdir .Ar poolname .Op Ar object ... .Nm @@ -217,6 +218,14 @@ Operate on an exported pool, not present in The .Fl p flag specifies the path under which devices are to be searched. +.It Fl x Ar dumpdir +All blocks accessed will be copied to files in the specified directory. +The blocks will be placed in sparse files whose name is the same as +that of the file or device read. zdb can be then run on the generated files. +Note that the +.Fl bbc +flags are sufficient to access (and thus copy) +all metadata on the pool. .It Fl F Attempt to make an unreadable pool readable by trying progressively older transactions. diff --git a/cddl/contrib/opensolaris/cmd/zdb/zdb.c b/cddl/contrib/opensolaris/cmd/zdb/zdb.c index 5974878..038cc28 100644 --- a/cddl/contrib/opensolaris/cmd/zdb/zdb.c +++ b/cddl/contrib/opensolaris/cmd/zdb/zdb.c @@ -112,7 +112,7 @@ usage(void) { (void) fprintf(stderr, "Usage: %s [-CumdibcsDvhLXFPA] [-t txg] [-e [-p path...]] " - "[-U config] [-M inflight I/Os] poolname [object...]\n" + "[-U config] [-M inflight I/Os] [-x dumpdir] poolname [object...]\n" " %s [-divPA] [-e -p path...] [-U config] dataset " "[object...]\n" " %s -m [-LXFPA] [-t txg] [-e [-p path...]] [-U config] " @@ -150,7 +150,7 @@ usage(void) (void) fprintf(stderr, " -R read and display block from a " "device\n\n"); (void) fprintf(stderr, " Below options are intended for use " - "with other options (except -l):\n"); + "with other options:\n"); (void) fprintf(stderr, " -A ignore assertions (-A), enable " "panic recovery (-AA) or both (-AAA)\n"); (void) fprintf(stderr, " -F attempt automatic rewind within " @@ -163,11 +163,14 @@ usage(void) "has altroot/not in a cachefile\n"); (void) fprintf(stderr, " -p -- use one or more with " "-e to specify path to vdev dir\n"); - (void) fprintf(stderr, " -P print numbers in parseable form\n"); + (void) fprintf(stderr, " -x -- " + "dump all read blocks into specified directory\n"); + (void) fprintf(stderr, " -P print numbers in parseable form\n"); (void) fprintf(stderr, " -t -- highest txg to use when " "searching for uberblocks\n"); (void) fprintf(stderr, " -M -- " - "specify the maximum number of checksumming I/Os [default is 200]"); + "specify the maximum number of " + "checksumming I/Os [default is 200]\n"); (void) fprintf(stderr, "Specify an option more than once (e.g. -bb) " "to make only that option verbose\n"); (void) fprintf(stderr, "Default is to dump everything non-verbosely\n"); @@ -3355,7 +3358,8 @@ main(int argc, char **argv) dprintf_setup(&argc, argv); - while ((c = getopt(argc, argv, "bcdhilmM:suCDRSAFLXevp:t:U:P")) != -1) { + while ((c = getopt(argc, argv, + "bcdhilmM:suCDRSAFLXx:evp:t:U:P")) != -1) { switch (c) { case 'b': case 'c': @@ -3408,6 +3412,9 @@ main(int argc, char **argv) } searchdirs[nsearch++] = optarg; break; + case 'x': + vn_dumpdir = optarg; + break; case 't': max_txg = strtoull(optarg, NULL, 0); if (max_txg < TXG_INITIAL) { diff --git a/cddl/contrib/opensolaris/lib/libzpool/common/kernel.c b/cddl/contrib/opensolaris/lib/libzpool/common/kernel.c index 2b174f9..c61c5c2 100644 --- a/cddl/contrib/opensolaris/lib/libzpool/common/kernel.c +++ b/cddl/contrib/opensolaris/lib/libzpool/common/kernel.c @@ -31,6 +31,7 @@ #include #include #include +#include #include #include #include @@ -52,6 +53,9 @@ char hw_serial[HW_HOSTID_LEN]; kmutex_t cpu_lock; #endif +/* If set, all blocks read will be copied to the specified directory. */ +char *vn_dumpdir = NULL; + struct utsname utsname = { "userland", "libzpool", "1", "1", "na" }; @@ -415,6 +419,7 @@ int vn_open(char *path, int x1, int flags, int mode, vnode_t **vpp, int x2, int x3) { int fd; + int dump_fd; vnode_t *vp; int old_umask; char realpath[MAXPATHLEN]; @@ -463,6 +468,17 @@ vn_open(char *path, int x1, int flags, int mode, vnode_t **vpp, int x2, int x3) if (flags & FCREAT) (void) umask(old_umask); + if (vn_dumpdir != NULL) { + char dumppath[MAXPATHLEN]; + (void) snprintf(dumppath, sizeof (dumppath), + "%s/%s", vn_dumpdir, basename(realpath)); + dump_fd = open64(dumppath, O_CREAT | O_WRONLY, 0666); + if (dump_fd == -1) + return (errno); + } else { + dump_fd = -1; + } + if (fd == -1) return (errno); @@ -478,6 +494,7 @@ vn_open(char *path, int x1, int flags, int mode, vnode_t **vpp, int x2, int x3) vp->v_fd = fd; vp->v_size = st.st_size; vp->v_path = spa_strdup(path); + vp->v_dump_fd = dump_fd; return (0); } @@ -510,6 +527,11 @@ vn_rdwr(int uio, vnode_t *vp, void *addr, ssize_t len, offset_t offset, if (uio == UIO_READ) { iolen = pread64(vp->v_fd, addr, len, offset); + if (vp->v_dump_fd != -1) { + int status = + pwrite64(vp->v_dump_fd, addr, iolen, offset); + ASSERT(status != -1); + } } else { /* * To simulate partial disk writes, we split writes into two @@ -536,6 +558,8 @@ void vn_close(vnode_t *vp, int openflag, cred_t *cr, kthread_t *td) { close(vp->v_fd); + if (vp->v_dump_fd != -1) + close(vp->v_dump_fd); spa_strfree(vp->v_path); umem_free(vp, sizeof (vnode_t)); } diff --git a/cddl/contrib/opensolaris/lib/libzpool/common/sys/zfs_context.h b/cddl/contrib/opensolaris/lib/libzpool/common/sys/zfs_context.h index cc8285d..03027c3 100644 --- a/cddl/contrib/opensolaris/lib/libzpool/common/sys/zfs_context.h +++ b/cddl/contrib/opensolaris/lib/libzpool/common/sys/zfs_context.h @@ -424,8 +424,10 @@ typedef struct vnode { uint64_t v_size; int v_fd; char *v_path; + int v_dump_fd; } vnode_t; +extern char *vn_dumpdir; #define AV_SCANSTAMP_SZ 32 /* length of anti-virus scanstamp */ typedef struct xoptattr { -- cgit v1.1