aoe: fill in per-AoE-target information for debugfs file

This information is presented in a compact format that has evolved for
easy routine scanning by expert humans, mostly developers and support
technicians helping to troubleshoot or test AoE-based systems.

Signed-off-by: Ed Cashin <ecashin@coraid.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 32 insertions, 1 deletions

diff --git a/drivers/block/aoe/aoeblk.c b/drivers/block/aoe/aoeblk.c
index 0511d38e412d..b58cbeb43e05 100644
--- a/drivers/block/aoe/aoeblk.c
+++ b/drivers/block/aoe/aoeblk.c
@@ -113,11 +113,42 @@ static ssize_t aoedisk_show_payload(struct device *dev,
 static int aoedisk_debugfs_show(struct seq_file *s, void *ignored)
 {
         struct aoedev *d;
+        struct aoetgt **t, **te;
+        struct aoeif *ifp, *ife;
         unsigned long flags;
+        char c;
 
         d = s->private;
+        seq_printf(s, "rttavg: %d rttdev: %d\n",
+                d->rttavg >> RTTSCALE,
+                d->rttdev >> RTTDSCALE);
+        seq_printf(s, "nskbpool: %d\n", skb_queue_len(&d->skbpool));
+        seq_printf(s, "kicked: %ld\n", d->kicked);
+        seq_printf(s, "maxbcnt: %ld\n", d->maxbcnt);
+        seq_printf(s, "ref: %ld\n", d->ref);
+
         spin_lock_irqsave(&d->lock, flags);
-        seq_printf(s, "%s\n", d->gd->disk_name); /* place holder */
+        t = d->targets;
+        te = t + d->ntargets;
+        for (; t < te && *t; t++) {
+                c = '\t';
+                seq_printf(s, "falloc: %ld\n", (*t)->falloc);
+                seq_printf(s, "ffree: %p\n",
+                        list_empty(&(*t)->ffree) ? NULL : (*t)->ffree.next);
+                seq_printf(s, "%pm:%d:%d:%d\n", (*t)->addr, (*t)->nout,
+                        (*t)->maxout, (*t)->nframes);
+                seq_printf(s, "\tssthresh:%d\n", (*t)->ssthresh);
+                seq_printf(s, "\ttaint:%d\n", (*t)->taint);
+                seq_printf(s, "\tr:%d\n", (*t)->rpkts);
+                seq_printf(s, "\tw:%d\n", (*t)->wpkts);
+                ifp = (*t)->ifs;
+                ife = ifp + ARRAY_SIZE((*t)->ifs);
+                for (; ifp->nd && ifp < ife; ifp++) {
+                        seq_printf(s, "%c%s", c, ifp->nd->name);
+                        c = ',';
+                }
+                seq_puts(s, "\n");
+        }
         spin_unlock_irqrestore(&d->lock, flags);
 
         return 0;