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-   -   edit: Hook up gfs2_edit to use new metadata info from libgfs2 (http://www.linux-archive.org/cluster-development/612895-edit-hook-up-gfs2_edit-use-new-metadata-info-libgfs2.html)

Steven Whitehouse 12-22-2011 03:57 PM

edit: Hook up gfs2_edit to use new metadata info from libgfs2
 
>From 6115d0f689fe6b06e2469623fed1476684dd140c Mon Sep 17 00:00:00 2001
From: Steven Whitehouse <swhiteho@redhat.com>
Date: Thu, 22 Dec 2011 16:41:13 +0000
Subject: [PATCH] edit: Hook up gfs2_edit to use new metadata info from
libgfs2

This is really intended as a demo. It is left as an exercise for
the reader to make this work for gfs1 metadata too. However that
should be a fairly trivial thing to do.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
---
gfs2/edit/hexedit.c | 497 +++-----------------------------------------------
1 files changed, 30 insertions(+), 467 deletions(-)

diff --git a/gfs2/edit/hexedit.c b/gfs2/edit/hexedit.c
index 5416900..73fb39f 100644
--- a/gfs2/edit/hexedit.c
+++ b/gfs2/edit/hexedit.c
@@ -85,435 +85,6 @@ int display(int identify_only);
}
} while(0)

-/* -------------------------------------------------------------------------
- * superblock
- * ------------------------------------------------------------------------- */
-const int fieldsize_sb[] = {
- sizeof(sb.sb_header.mh_magic),
- sizeof(sb.sb_header.mh_type),
- sizeof(sb.sb_header.__pad0),
- sizeof(sb.sb_header.mh_format),
- sizeof(sb.sb_header.__pad1),
- sizeof(sb.sb_fs_format),
- sizeof(sb.sb_multihost_format),
- sizeof(sb.__pad0),
- sizeof(sb.sb_bsize),
- sizeof(sb.sb_bsize_shift),
- sizeof(sb.__pad1),
- sizeof(sb.sb_master_dir.no_formal_ino),
- sizeof(sb.sb_master_dir.no_addr),
- sizeof(sb.__pad2.no_formal_ino),
- sizeof(sb.__pad2.no_addr),
- sizeof(sb.sb_root_dir.no_formal_ino),
- sizeof(sb.sb_root_dir.no_addr),
- sizeof(sb.sb_lockproto),
- sizeof(sb.sb_locktable),
- sizeof(sb.__pad3.no_formal_ino),
- sizeof(sb.__pad3.no_addr),
- sizeof(sb.__pad4.no_formal_ino),
- sizeof(sb.__pad4.no_addr),
- sizeof(sb.sb_uuid),
- -1
-};
-
-const char *fieldnames_sb[] = {
- "mh_magic",
- "mh_type",
- "mh.__pad0",
- "mh_format",
- "mh.__pad1",
- "sb_fs_format",
- "sb_multihost_format",
- "__pad0",
- "sb_bsize",
- "sb_bsize_shift",
- "__pad1",
- "master.no_formal_ino",
- "master.no_addr",
- "__pad2.no_formal_ino",
- "__pad2.no_addr",
- "root.no_formal_ino",
- "root.no_addr",
- "sb_lockproto",
- "sb_locktable",
- "__pad3.no_formal_ino",
- "__pad3.no_addr",
- "__pad4.no_formal_ino",
- "__pad4.no_addr",
- "sb_uuid",
-};
-
-/* This determines which field the cursor is located in */
-static int which_field_sb(int off)
-{
- int i, tot;
-
- tot = 0;
- for (i = 0; fieldsize_sb[i] != -1; i++) {
- tot += fieldsize_sb[i];
- if (off < tot)
- return i;
- }
- return -1;
-}
-
-static const char *which_fieldname_sb(int off)
-{
- int w = which_field_sb(off);
- if (w < 0)
- return NULL;
- return fieldnames_sb[w];
-}
-
-/* -------------------------------------------------------------------------
- * rgrp
- * ------------------------------------------------------------------------- */
-const int fieldsize_rgrp[] = {
- sizeof(lrgrp->rg_header.mh_magic),
- sizeof(lrgrp->rg_header.mh_type),
- sizeof(lrgrp->rg_header.__pad0),
- sizeof(lrgrp->rg_header.mh_format),
- sizeof(lrgrp->rg_header.__pad1),
- sizeof(lrgrp->rg_flags),
- sizeof(lrgrp->rg_free),
- sizeof(lrgrp->rg_dinodes),
- sizeof(lrgrp->__pad),
- sizeof(lrgrp->rg_igeneration),
- sizeof(lrgrp->rg_reserved),
- -1
-};
-
-const char *fieldnames_rgrp[] = {
- "mh_magic",
- "mh_type",
- "mh.__pad0",
- "mh_format",
- "mh.__pad1",
- "rg_flags",
- "rg_free",
- "rg_dinodes",
- "__pad",
- "rg_igeneration",
- "rg_reserved",
-};
-
-static int which_field_rgrp(int off)
-{
- int i, tot;
-
- tot = 0;
- for (i = 0; fieldsize_rgrp[i] != -1; i++) {
- tot += fieldsize_rgrp[i];
- if (off < tot)
- return i;
- }
- return -1;
-}
-
-static const char *which_fieldname_rgrp(int off)
-{
- int w = which_field_rgrp(off);
- if (w < 0)
- return NULL;
- return fieldnames_rgrp[w];
-}
-
-/* -------------------------------------------------------------------------
- * metaheader
- * ------------------------------------------------------------------------- */
-const int fieldsize_mh[] = {
- sizeof(lmh->mh_magic),
- sizeof(lmh->mh_type),
- sizeof(lmh->__pad0),
- sizeof(lmh->mh_format),
- sizeof(lmh->__pad1),
- -1
-};
-
-const char *fieldnames_mh[] = {
- "mh_magic",
- "mh_type",
- "mh.__pad0",
- "mh_format",
- "mh.__pad1",
-};
-
-static int which_field_mh(int off)
-{
- int i, tot;
-
- tot = 0;
- for (i = 0; fieldsize_mh[i] != -1; i++) {
- tot += fieldsize_mh[i];
- if (off < tot)
- return i;
- }
- return -1;
-}
-
-static const char *which_fieldname_mh(int off)
-{
- int w = which_field_mh(off);
- if (w < 0)
- return NULL;
- return fieldnames_mh[w];
-}
-
-/* -------------------------------------------------------------------------
- * dinode
- * ------------------------------------------------------------------------- */
-const int fieldsize_di[] = {
- sizeof(ldi->di_header.mh_magic),
- sizeof(ldi->di_header.mh_type),
- sizeof(ldi->di_header.__pad0),
- sizeof(ldi->di_header.mh_format),
- sizeof(ldi->di_header.__pad1),
- sizeof(ldi->di_num.no_formal_ino),
- sizeof(ldi->di_num.no_addr),
- sizeof(ldi->di_mode),
- sizeof(ldi->di_uid),
- sizeof(ldi->di_gid),
- sizeof(ldi->di_nlink),
- sizeof(ldi->di_size),
- sizeof(ldi->di_blocks),
- sizeof(ldi->di_atime),
- sizeof(ldi->di_mtime),
- sizeof(ldi->di_ctime),
- sizeof(ldi->di_major),
- sizeof(ldi->di_minor),
- sizeof(ldi->di_goal_meta),
- sizeof(ldi->di_goal_data),
- sizeof(ldi->di_generation),
- sizeof(ldi->di_flags),
- sizeof(ldi->di_payload_format),
- sizeof(ldi->__pad1),
- sizeof(ldi->di_height),
- sizeof(ldi->__pad2),
- sizeof(ldi->__pad3),
- sizeof(ldi->di_depth),
- sizeof(ldi->di_entries),
- sizeof(ldi->__pad4.no_formal_ino),
- sizeof(ldi->__pad4.no_addr),
- sizeof(ldi->di_eattr),
- sizeof(ldi->di_atime_nsec),
- sizeof(ldi->di_mtime_nsec),
- sizeof(ldi->di_ctime_nsec),
- sizeof(ldi->di_reserved),
- -1
-};
-
-const char *fieldnames_di[] = {
- "mh_magic",
- "mh_type",
- "mh.__pad0",
- "mh_format",
- "mh.__pad1",
- "no_formal_ino",
- "no_addr",
- "di_mode",
- "di_uid",
- "di_gid",
- "di_nlink",
- "di_size",
- "di_blocks",
- "di_atime",
- "di_mtime",
- "di_ctime",
- "di_major",
- "di_minor",
- "di_goal_meta",
- "di_goal_data",
- "di_generation",
- "di_flags",
- "di_payload_format",
- "__pad1",
- "di_height",
- "__pad2",
- "__pad3",
- "di_depth",
- "di_entries",
- "__pad4.no_formal_ino",
- "__pad4.no_addr",
- "di_eattr",
- "di_atime_nsec",
- "di_mtime_nsec",
- "di_ctime_nsec",
- "di_reserved",
-};
-
-static int which_field_di(int off)
-{
- int i, tot;
-
- tot = 0;
- for (i = 0; fieldsize_di[i] != -1; i++) {
- tot += fieldsize_di[i];
- if (off < tot)
- return i;
- }
- return -1;
-}
-
-static const char *which_fieldname_di(int off)
-{
- int w = which_field_di(off);
- if (w < 0)
- return NULL;
- return fieldnames_di[w];
-}
-
-/* -------------------------------------------------------------------------
- * directory leaf
- * ------------------------------------------------------------------------- */
-const int fieldsize_lf[] = {
- sizeof(lleaf->lf_header.mh_magic),
- sizeof(lleaf->lf_header.mh_type),
- sizeof(lleaf->lf_header.__pad0),
- sizeof(lleaf->lf_header.mh_format),
- sizeof(lleaf->lf_header.__pad1),
- sizeof(lleaf->lf_depth),
- sizeof(lleaf->lf_entries),
- sizeof(lleaf->lf_dirent_format),
- sizeof(lleaf->lf_next),
- sizeof(lleaf->lf_reserved),
- -1
-};
-
-const char *fieldnames_lf[] = {
- "mh_magic",
- "mh_type",
- "mh.__pad0",
- "mh_format",
- "mh.__pad1",
- "lf_depth",
- "lf_entries",
- "lf_dirent_format",
- "lf_next",
- "lf_reserved",
-};
-
-static int which_field_lf(int off)
-{
- int i, tot;
-
- tot = 0;
- for (i = 0; fieldsize_lf[i] != -1; i++) {
- tot += fieldsize_lf[i];
- if (off < tot)
- return i;
- }
- return -1;
-}
-
-static const char *which_fieldname_lf(int off)
-{
- int w = which_field_lf(off);
- if (w < 0)
- return NULL;
- return fieldnames_lf[w];
-}
-
-/* -------------------------------------------------------------------------
- * log header
- * ------------------------------------------------------------------------- */
-const int fieldsize_lh[] = {
- sizeof(llh->lh_header.mh_magic),
- sizeof(llh->lh_header.mh_type),
- sizeof(llh->lh_header.__pad0),
- sizeof(llh->lh_header.mh_format),
- sizeof(llh->lh_header.__pad1),
- sizeof(llh->lh_sequence),
- sizeof(llh->lh_flags),
- sizeof(llh->lh_tail),
- sizeof(llh->lh_blkno),
- sizeof(llh->lh_hash),
- -1
-};
-
-const char *fieldnames_lh[] = {
- "mh_magic",
- "mh_type",
- "mh.__pad0",
- "mh_format",
- "mh.__pad1",
- "lh_sequence",
- "lh_flags",
- "lh_tail",
- "lh_blkno",
- "lh_hash",
-};
-
-static int which_field_lh(int off)
-{
- int i, tot;
-
- tot = 0;
- for (i = 0; fieldsize_lh[i] != -1; i++) {
- tot += fieldsize_lh[i];
- if (off < tot)
- return i;
- }
- return -1;
-}
-
-static const char *which_fieldname_lh(int off)
-{
- int w = which_field_lh(off);
- if (w < 0)
- return NULL;
- return fieldnames_lh[w];
-}
-
-/* -------------------------------------------------------------------------
- * log descriptor
- * ------------------------------------------------------------------------- */
-const int fieldsize_ld[] = {
- sizeof(lld->ld_header.mh_magic),
- sizeof(lld->ld_header.mh_type),
- sizeof(lld->ld_header.__pad0),
- sizeof(lld->ld_header.mh_format),
- sizeof(lld->ld_header.__pad1),
- sizeof(lld->ld_type),
- sizeof(lld->ld_length),
- sizeof(lld->ld_data1),
- sizeof(lld->ld_data2),
- sizeof(lld->ld_reserved),
- -1
-};
-
-const char *fieldnames_ld[] = {
- "mh_magic",
- "mh_type",
- "mh.__pad0",
- "mh_format",
- "mh.__pad1",
- "ld_type",
- "ld_length",
- "ld_data1",
- "ld_data2",
- "ld_reserved",
-};
-
-static int which_field_ld(int off)
-{
- int i, tot;
-
- tot = 0;
- for (i = 0; fieldsize_ld[i] != -1; i++) {
- tot += fieldsize_ld[i];
- if (off < tot)
- return i;
- }
- return -1;
-}
-
-static const char *which_fieldname_ld(int off)
-{
- int w = which_field_ld(off);
- if (w < 0)
- return NULL;
- return fieldnames_ld[w];
-}

/* -------------------------------------------------------------------------
* field-related functions:
@@ -1235,6 +806,20 @@ int display_block_type(int from_restore)
return ret_type;
}

+static const struct lgfs2_metadata *find_mtype(uint32_t mtype)
+{
+ const struct lgfs2_metadata *m = lgfs2_metadata;
+ unsigned n = 0;
+
+ do {
+ if (m->gfs2 && m->mh_type == mtype)
+ return m;
+ n++;
+ } while (n < lgfs2_metadata_size);
+
+ return NULL;
+}
+
/* ------------------------------------------------------------------------ */
/* hexdump - hex dump the filesystem block to the screen */
/* ------------------------------------------------------------------------ */
@@ -1342,45 +927,20 @@ static int hexdump(uint64_t startaddr, int len)
}
print_gfs2("] ");
if (print_field >= 0) {
- switch (get_block_type(bh)) {
- case GFS2_METATYPE_SB: /* 1 */
- print_gfs2(which_fieldname_sb(print_field));
- break;
- case GFS2_METATYPE_RG: /* 2 */
- print_gfs2(which_fieldname_rgrp(print_field));
- break;
- case GFS2_METATYPE_RB: /* 3 */
- print_gfs2(which_fieldname_mh(print_field));
- break;
- case GFS2_METATYPE_DI: /* 4 */
- print_gfs2(which_fieldname_di(print_field));
- break;
- case GFS2_METATYPE_IN: /* 5 */
- print_gfs2(which_fieldname_mh(print_field));
- break;
- case GFS2_METATYPE_LF: /* 6 */
- print_gfs2(which_fieldname_lf(print_field));
- break;
- case GFS2_METATYPE_JD:
- print_gfs2(which_fieldname_mh(print_field));
- break;
- case GFS2_METATYPE_LH:
- print_gfs2(which_fieldname_lh(print_field));
- break;
- case GFS2_METATYPE_LD:
- print_gfs2(which_fieldname_ld(print_field));
- break;
- case GFS2_METATYPE_EA:
- break;
- case GFS2_METATYPE_ED:
- break;
- case GFS2_METATYPE_LB:
- break;
- case GFS2_METATYPE_QC:
- break;
- default:
- break;
+ const struct lgfs2_metadata *m = find_mtype(get_block_type(bh));
+ if (m) {
+ const struct lgfs2_metafield *f;
+ unsigned n;
+ for (n = 0; n < m->nfields; n++) {
+ f = &m->fields[n];
+ if (print_field >= f->offset &&
+ print_field < (f->offset + f->length)) {
+ print_gfs2(m->fields[n].name);
+ break;
+ }
+ }
}
+
}
if (cursor_line) {
if (((*(bh->b_data + 7) == GFS2_METATYPE_IN) ||
@@ -3546,6 +3106,9 @@ int main(int argc, char *argv[])
{
int i, j, fd;

+ if (lgfs2_selfcheck())
+ return EXIT_FAILURE;
+
indirect = malloc(sizeof(struct iinfo));
if (!indirect)
die("Out of memory.");
--
1.7.4.4


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