Commit 72244b6b authored by Bob Peterson's avatar Bob Peterson
Browse files

gfs2: improve debug information when lvb mismatches are found 



Before this patch, gfs2_rgrp_bh_get would check for lvb mismatches,
but it wouldn't tell you what was actually wrong. This patch adds
more information to help us debug it. It also makes rgrp consistency
checks dump any bad rgrps, and the rgrp dump code dump any lvbs
as well as the rgrp itself.

Signed-off-by: default avatarBob Peterson <rpeterso@redhat.com>
Acked-by: default avatarSteven Whitehouse <swhiteho@redhat.com>
parent 050cdc6c

fs/gfs2/rgrp.c

+36 −5
Original line number Diff line number Diff line
@@ -1103,12 +1103,35 @@ static int gfs2_rgrp_lvb_valid(struct gfs2_rgrpd *rgd) 
{

	struct gfs2_rgrp_lvb *rgl = rgd->rd_rgl;

	struct gfs2_rgrp *str = (struct gfs2_rgrp *)rgd->rd_bits[0].bi_bh->b_data;

	int valid = 1;



	if (rgl->rl_flags != str->rg_flags || rgl->rl_free != str->rg_free ||

	    rgl->rl_dinodes != str->rg_dinodes ||

	    rgl->rl_igeneration != str->rg_igeneration)

		return 0;

	return 1;

	if (rgl->rl_flags != str->rg_flags) {

		printk(KERN_WARNING "GFS2: rgd: %llu lvb flag mismatch %u/%u",

		       (unsigned long long)rgd->rd_addr,

		       be32_to_cpu(rgl->rl_flags), be32_to_cpu(str->rg_flags));

		valid = 0;

	}

	if (rgl->rl_free != str->rg_free) {

		printk(KERN_WARNING "GFS2: rgd: %llu lvb free mismatch %u/%u",

		       (unsigned long long)rgd->rd_addr,

		       be32_to_cpu(rgl->rl_free), be32_to_cpu(str->rg_free));

		valid = 0;

	}

	if (rgl->rl_dinodes != str->rg_dinodes) {

		printk(KERN_WARNING "GFS2: rgd: %llu lvb dinode mismatch %u/%u",

		       (unsigned long long)rgd->rd_addr,

		       be32_to_cpu(rgl->rl_dinodes),

		       be32_to_cpu(str->rg_dinodes));

		valid = 0;

	}

	if (rgl->rl_igeneration != str->rg_igeneration) {

		printk(KERN_WARNING "GFS2: rgd: %llu lvb igen mismatch "

		       "%llu/%llu", (unsigned long long)rgd->rd_addr,

		       (unsigned long long)be64_to_cpu(rgl->rl_igeneration),

		       (unsigned long long)be64_to_cpu(str->rg_igeneration));

		valid = 0;

	}

	return valid;

}



static u32 count_unlinked(struct gfs2_rgrpd *rgd)
@@ -2244,6 +2267,14 @@ void gfs2_rgrp_dump(struct seq_file *seq, const struct gfs2_glock *gl) 
		       (unsigned long long)rgd->rd_addr, rgd->rd_flags,

		       rgd->rd_free, rgd->rd_free_clone, rgd->rd_dinodes,

		       rgd->rd_reserved, rgd->rd_extfail_pt);

	if (rgd->rd_sbd->sd_args.ar_rgrplvb) {

		struct gfs2_rgrp_lvb *rgl = rgd->rd_rgl;



		gfs2_print_dbg(seq, "  L: f:%02x b:%u i:%u\n",

			       be32_to_cpu(rgl->rl_flags),

			       be32_to_cpu(rgl->rl_free),

			       be32_to_cpu(rgl->rl_dinodes));

	}

	spin_lock(&rgd->rd_rsspin);

	for (n = rb_first(&rgd->rd_rstree); n; n = rb_next(&trs->rs_node)) {

		trs = rb_entry(n, struct gfs2_blkreserv, rs_node);

fs/gfs2/util.c

+3 −0
Original line number Diff line number Diff line
@@ -19,6 +19,7 @@ 
#include "gfs2.h"

#include "incore.h"

#include "glock.h"

#include "rgrp.h"

#include "util.h"



struct kmem_cache *gfs2_glock_cachep __read_mostly;
@@ -181,6 +182,8 @@ int gfs2_consist_rgrpd_i(struct gfs2_rgrpd *rgd, int cluster_wide, 
{

	struct gfs2_sbd *sdp = rgd->rd_sbd;

	int rv;



	gfs2_rgrp_dump(NULL, rgd->rd_gl);

	rv = gfs2_lm_withdraw(sdp,

			      "fatal: filesystem consistency error\n"

			      "  RG = %llu\n"

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