From e4bfcac449b66a373afe6120e874d225754b59c8 Mon Sep 17 00:00:00 2001
From: alex <alex>
Date: Wed, 27 Apr 2005 03:18:37 +0000
Subject: [PATCH] b=6049
- handle final completion calls only
---
lustre/obdfilter/filter_io_26.c | 24 ++++++++++++++++++++++++
1 file changed, 24 insertions(+)
diff --git a/lustre/obdfilter/filter_io_26.c b/lustre/obdfilter/filter_io_26.c
index 34f459a1f9..5a5f2349a4 100644
--- a/lustre/obdfilter/filter_io_26.c
+++ b/lustre/obdfilter/filter_io_26.c
@@ -57,6 +57,30 @@ static int dio_complete_routine(struct bio *bio, unsigned int done, int error)
struct dio_request *dreq = bio->bi_private;
unsigned long flags;
+ if (bio->bi_size) {
+ CWARN("gets called against non-complete bio 0x%p: %d/%d/%d\n",
+ bio, bio->bi_size, done, error);
+ return 1;
+ }
+
+ if (dreq == NULL) {
+ CERROR("***** bio->bi_private is NULL! This should never "
+ "happen. Normally, I would crash here, but instead I "
+ "will dump the bio contents to the console. Please "
+ "report this to CFS, along with any interesting messages "
+ "leading up to this point (like SCSI errors, perhaps). "
+ "Because bi_private is NULL, I can't wake up the thread "
+ "that initiated this I/O -- so you will probably have to "
+ "reboot this node.");
+ CERROR("bi_next: %p, bi_flags: %lx, bi_rw: %lu, bi_vcnt: %d, "
+ "bi_idx: %d, bi->size: %d, bi_end_io: %p, bi_cnt: %d, "
+ "bi_private: %p\n", bio->bi_next, bio->bi_flags,
+ bio->bi_rw, bio->bi_vcnt, bio->bi_idx, bio->bi_size,
+ bio->bi_end_io, atomic_read(&bio->bi_cnt),
+ bio->bi_private);
+ return 0;
+ }
+
spin_lock_irqsave(&dreq->dr_lock, flags);
bio->bi_private = dreq->dr_bios;
dreq->dr_bios = bio;
--
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