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From: Bob Peterson <rpeterso@fedoraproject.org> To: cluster-cvs-relay@redhat.com Subject: cluster: RHEL5 - gfs2_edit: Display pointer numbers and use color changes to Date: Wed, 25 Mar 2009 15:10:00 -0000 [thread overview] Message-ID: <20090325151005.86E05120281@lists.fedorahosted.org> (raw) Gitweb: http://git.fedorahosted.org/git/cluster.git?p=cluster.git;a=commitdiff;h=9ee39052aa3655ea76b50a5805b30ceb0bb62983 Commit: 9ee39052aa3655ea76b50a5805b30ceb0bb62983 Parent: fc5f1f56f873b511196eba2d7b70ae959e98e290 Author: Bob Peterson <rpeterso@redhat.com> AuthorDate: Wed Mar 25 10:06:21 2009 -0500 Committer: Bob Peterson <rpeterso@redhat.com> CommitterDate: Wed Mar 25 10:06:21 2009 -0500 gfs2_edit: Display pointer numbers and use color changes to differentiate between zero-data and valid pointers. bz 483799 This patch does basically two things to improve debugging of indirect pointer problems such as bug #490136 (for which I developed it). First, I improved the color scheme and made it differentiate zero-data from non-zero data for some metadata block types. This allows you to easily see where a pointer is located on the screen rather than staring into a sea of zeroes. Second, I made gfs2_edit tell you what pointer number your cursor is at for dinodes and indirect blocks. That way, you can easily check your metapath information against what's on disk. I transposed the "red" and "pink" sections so that the cursor is red and therefore easier to see. --- gfs2/edit/hexedit.c | 98 +++++++++++++++++++++++++++++++++++++------------- 1 files changed, 72 insertions(+), 26 deletions(-) diff --git a/gfs2/edit/hexedit.c b/gfs2/edit/hexedit.c index 2da61ce..df965ae 100644 --- a/gfs2/edit/hexedit.c +++ b/gfs2/edit/hexedit.c @@ -30,13 +30,11 @@ #include <sys/mount.h> #include <dirent.h> -#include "linux_endian.h" #include <linux/gfs2_ondisk.h> #include "copyright.cf" #define EXTERN #include "hexedit.h" -#include "linux_endian.h" #include "libgfs2.h" #include "gfs2hex.h" @@ -46,8 +44,7 @@ const char *mtypes[] = {"none", "sb", "rg", "rb", "di", "in", "lf", "jd", "lh", "ld", "ea", "ed", "lb", "13", "qc"}; -const char *allocdesc[] = {"Free ", "Data ", "Unlnk", - "Meta ", "Resrv"}; +const char *allocdesc[] = {"Free ", "Data ", "Unlnk", "Meta ", "Resrv"}; int display(int identify_only); extern void eol(int col); @@ -585,8 +582,11 @@ int display_block_type(const char *lpBuffer, int from_restore) struct_len = sizeof(struct gfs2_dinode); break; case GFS2_METATYPE_IN: /* 5 */ - print_gfs2("(indir inode blklst)"); - struct_len = sizeof(struct gfs2_meta_header); + print_gfs2("(indir blklist)"); + if (gfs1) + struct_len = sizeof(struct gfs_indirect); + else + struct_len = sizeof(struct gfs2_meta_header); break; case GFS2_METATYPE_LF: /* 6 */ print_gfs2("(directory leaf)"); @@ -628,17 +628,17 @@ int display_block_type(const char *lpBuffer, int from_restore) break; default: print_gfs2("(wtf?)"); - struct_len = 512; + struct_len = sbd.bsize; break; } } else - struct_len = 512; + struct_len = sbd.bsize; eol(0); if (from_restore) return ret_type; if (termlines && dmode == HEX_MODE) { - int type; + int type, pgnum; struct rgrp_list *rgd; rgd = gfs2_blk2rgrpd(&sbd, block); @@ -650,12 +650,27 @@ int display_block_type(const char *lpBuffer, int from_restore) screen_chunk_size = ((termlines - 4) * 16) >> 8 << 8; if (!screen_chunk_size) screen_chunk_size = 256; - print_gfs2("(p.%d of %d--%s)", - (offset / screen_chunk_size) + 1, + pgnum = (offset / screen_chunk_size); + print_gfs2("(p.%d of %d--%s)", pgnum + 1, (sbd.bsize % screen_chunk_size) > 0 ? sbd.bsize / screen_chunk_size + 1 : sbd.bsize / screen_chunk_size, allocdesc[type]); /*eol(9);*/ + if ((*(lpBuffer+7) == GFS2_METATYPE_IN) || + (*(lpBuffer+7) == GFS2_METATYPE_DI && + (*(lpBuffer + 0x8b) || *(lpBuffer + 0x8a)))) { + int ptroffset = edit_row[dmode] * 16 + edit_col[dmode]; + + if (ptroffset >= struct_len || pgnum) { + int pnum; + + pnum = pgnum * screen_chunk_size; + pnum += (ptroffset - struct_len); + pnum /= sizeof(uint64_t); + + print_gfs2(" pointer 0x%x", pnum); + } + } } if (block == sbd.sd_sb.sb_root_dir.no_addr) print_gfs2("--------------- Root directory ------------------"); @@ -718,6 +733,8 @@ int hexdump(uint64_t startaddr, const char *lpBuffer, int len) line <= ((screen_chunk_size / 16) + 2)) || (!termlines && l < len)) && l < sbd.bsize) { + int ptr_not_null = 0; + if (termlines) { move(line, 0); COLORS_OFFSETS; /* cyan for offsets */ @@ -728,28 +745,55 @@ int hexdump(uint64_t startaddr, const char *lpBuffer, int len) print_gfs2("%.16"PRIX64, startaddr + l); if (termlines) { if (l < struct_len) - COLORS_NORMAL; /* normal part of the structure */ - else if (gfs2_struct_type == GFS2_METATYPE_DI && + COLORS_NORMAL; /* normal part of structure */ + else if (gfs2_struct_type == GFS2_METATYPE_DI && l < struct_len + di.di_size) COLORS_CONTENTS; /* after struct but not eof */ else - COLORS_SPECIAL; /* beyond the end of the structure */ + COLORS_SPECIAL; /* beyond end of the struct */ } for (i = 0; i < 16; i++) { /* first print it in hex */ + /* Figure out if we have a null pointer--for colors */ + if (((gfs2_struct_type == GFS2_METATYPE_IN) || + (gfs2_struct_type == GFS2_METATYPE_DI && + l < struct_len + di.di_size && + (di.di_height > 0 || !S_ISREG(di.di_mode)))) && + (i==0 || i==8)) { + int j; + + ptr_not_null = 0; + for (j = 0; j < 8; j++) { + if (*(pointer + j)) { + ptr_not_null = 1; + break; + } + } + } if (termlines) { if (l + i < struct_len) - COLORS_NORMAL; /* normal part of the structure */ - else if (gfs2_struct_type == GFS2_METATYPE_DI && - l + i < struct_len + di.di_size) - COLORS_CONTENTS; /* beyond structure but not eof */ - else - COLORS_SPECIAL; /* past end of the structure */ + COLORS_NORMAL; /* in the structure */ + else if (gfs2_struct_type == GFS2_METATYPE_DI + && l + i < struct_len + di.di_size) { + if ((!di.di_height && + S_ISREG(di.di_mode)) || + !ptr_not_null) + COLORS_CONTENTS;/*stuff data */ + else + COLORS_SPECIAL;/* non-null */ + } + else if (gfs2_struct_type == GFS2_METATYPE_IN){ + if (ptr_not_null) + COLORS_SPECIAL;/* non-null */ + else + COLORS_CONTENTS;/* null */ + } else + COLORS_SPECIAL; /* past the struct */ } if (i%4 == 0) print_gfs2(" "); if (termlines && line == edit_row[dmode] + 3 && i == edit_col[dmode]) { - COLORS_HIGHLIGHT; /* normal part of the structure */ + COLORS_HIGHLIGHT; /* in the structure */ memset(estring,0,3); sprintf(estring,"%02X",*pointer); } @@ -757,9 +801,9 @@ int hexdump(uint64_t startaddr, const char *lpBuffer, int len) if (termlines && line == edit_row[dmode] + 3 && i == edit_col[dmode]) { if (l < struct_len + offset) - COLORS_NORMAL; /* normal part of the structure */ + COLORS_NORMAL; /* in the structure */ else - COLORS_SPECIAL; /* beyond end of the structure */ + COLORS_SPECIAL; /* beyond structure */ } pointer++; } @@ -2182,8 +2226,8 @@ void init_colors() init_pair(COLOR_TITLE, COLOR_BLACK, COLOR_CYAN); init_pair(COLOR_NORMAL, COLOR_BLACK, COLOR_WHITE); init_pair(COLOR_INVERSE, COLOR_WHITE, COLOR_BLACK); - init_pair(COLOR_SPECIAL, COLOR_RED, COLOR_WHITE); - init_pair(COLOR_HIGHLIGHT, COLOR_MAGENTA, COLOR_WHITE); + init_pair(COLOR_SPECIAL, COLOR_MAGENTA, COLOR_WHITE); + init_pair(COLOR_HIGHLIGHT, COLOR_RED, COLOR_WHITE); /*cursor*/ init_pair(COLOR_OFFSETS, COLOR_CYAN, COLOR_WHITE); init_pair(COLOR_CONTENTS, COLOR_BLUE, COLOR_WHITE); } @@ -3413,7 +3457,9 @@ int main(int argc, char *argv[]) read_superblock(fd); max_block = lseek(fd, 0, SEEK_END) / sbd.bsize; strcpy(sbd.device_name, device); - if (!gfs1) + if (gfs1) + edit_row[GFS2_MODE]++; + else read_master_dir(); block_in_mem = -1; process_parameters(argc, argv, 1); /* get what to print from cmdline */
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