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GFS2: Improve resource group error handling

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This patch improves the error handling in the case where we
discover that the summary information in the resource group
doesn't match the bitmap information while in the process of
allocating blocks. Originally this resulted in a kernel bug,
but this patch changes that so that we return -EIO and print
some messages explaining what went wrong, and how to fix it.

We also remember locally not to try and allocate from the
same rgrp again, so that a subsequent allocation in a
different rgrp should succeed.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
This commit is contained in:
Steven Whitehouse
2009-05-20 10:48:47 +01:00
parent ef9e8b14a5
commit 0901097834
7 changed files with 100 additions and 68 deletions
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20
fs/gfs2/glops.c
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@ -309,24 +309,6 @@ static void rgrp_go_unlock(struct gfs2_holder *gh)
gfs2_rgrp_bh_put(gh->gh_gl->gl_object);
}
/**
* rgrp_go_dump - print out an rgrp
* @seq: The iterator
* @gl: The glock in question
*
*/
static int rgrp_go_dump(struct seq_file *seq, const struct gfs2_glock *gl)
{
const struct gfs2_rgrpd *rgd = gl->gl_object;
if (rgd == NULL)
return 0;
gfs2_print_dbg(seq, " R: n:%llu f:%02x b:%u/%u i:%u\n",
(unsigned long long)rgd->rd_addr, rgd->rd_flags,
rgd->rd_free, rgd->rd_free_clone, rgd->rd_dinodes);
return 0;
}
/**
* trans_go_sync - promote/demote the transaction glock
* @gl: the glock
@ -410,7 +392,7 @@ const struct gfs2_glock_operations gfs2_rgrp_glops = {
.go_demote_ok = rgrp_go_demote_ok,
.go_lock = rgrp_go_lock,
.go_unlock = rgrp_go_unlock,
.go_dump = rgrp_go_dump,
.go_dump = gfs2_rgrp_dump,
.go_type = LM_TYPE_RGRP,
.go_min_hold_time = HZ / 5,
};