From 3e66d88f308af2a9bd3410f7476af342acf48b91 Mon Sep 17 00:00:00 2001
From: Sage Weil <sage@redhat.com>
Date: Thu, 16 Nov 2017 08:58:01 -0600
Subject: [PATCH] osd/*Backend: debug: inject sleep during deep scrub

Signed-off-by: Sage Weil <sage@redhat.com>
---
 src/common/legacy_config_opts.h | 1 +
 src/common/options.cc           | 3 +++
 src/osd/ECBackend.cc            | 6 ++++++
 src/osd/ReplicatedBackend.cc    | 6 ++++++
 4 files changed, 16 insertions(+)

diff --git a/src/common/legacy_config_opts.h b/src/common/legacy_config_opts.h
index f2b8196ef8e..2794084be52 100644
--- a/src/common/legacy_config_opts.h
+++ b/src/common/legacy_config_opts.h
@@ -787,6 +787,7 @@ OPTION(osd_debug_misdirected_ops, OPT_BOOL)
 OPTION(osd_debug_skip_full_check_in_recovery, OPT_BOOL)
 OPTION(osd_debug_random_push_read_error, OPT_DOUBLE)
 OPTION(osd_debug_verify_cached_snaps, OPT_BOOL)
+OPTION(osd_debug_deep_scrub_sleep, OPT_FLOAT)
 OPTION(osd_enable_op_tracker, OPT_BOOL) // enable/disable OSD op tracking
 OPTION(osd_num_op_tracker_shard, OPT_U32) // The number of shards for holding the ops
 OPTION(osd_op_history_size, OPT_U32)    // Max number of completed ops to track
diff --git a/src/common/options.cc b/src/common/options.cc
index b286457b9b3..c700871fd77 100644
--- a/src/common/options.cc
+++ b/src/common/options.cc
@@ -2889,6 +2889,9 @@ std::vector<Option> get_global_options() {
     .set_default(false)
     .set_description(""),
 
+    Option("osd_debug_deep_scrub_sleep", Option::TYPE_FLOAT, Option::LEVEL_DEV)
+    .set_default(0),
+
     Option("osd_enable_op_tracker", Option::TYPE_BOOL, Option::LEVEL_ADVANCED)
     .set_default(true)
     .set_description(""),
diff --git a/src/osd/ECBackend.cc b/src/osd/ECBackend.cc
index 47b4d799a89..8901442aadb 100644
--- a/src/osd/ECBackend.cc
+++ b/src/osd/ECBackend.cc
@@ -2428,6 +2428,8 @@ void ECBackend::be_deep_scrub(
   uint64_t stride = cct->_conf->osd_deep_scrub_stride;
   if (stride % sinfo.get_chunk_size())
     stride += sinfo.get_chunk_size() - (stride % sinfo.get_chunk_size());
+  utime_t sleeptime;
+  sleeptime.set_from_double(cct->_conf->osd_debug_deep_scrub_sleep);
   uint64_t pos = 0;
   bool skip_data_digest = store->has_builtin_csum() &&
     g_conf->get_val<bool>("osd_skip_data_digest");
@@ -2436,6 +2438,10 @@ void ECBackend::be_deep_scrub(
                            CEPH_OSD_OP_FLAG_FADVISE_DONTNEED;
 
   while (true) {
+    if (sleeptime != utime_t()) {
+      lgeneric_derr(cct) << __func__ << " sleeping for " << sleeptime << dendl;
+      sleeptime.sleep();
+    }
     bufferlist bl;
     handle.reset_tp_timeout();
     r = store->read(
diff --git a/src/osd/ReplicatedBackend.cc b/src/osd/ReplicatedBackend.cc
index be83c8d82e6..3047b945f86 100644
--- a/src/osd/ReplicatedBackend.cc
+++ b/src/osd/ReplicatedBackend.cc
@@ -666,11 +666,17 @@ void ReplicatedBackend::be_deep_scrub(
   __u64 pos = 0;
   bool skip_data_digest = store->has_builtin_csum() &&
     g_conf->get_val<bool>("osd_skip_data_digest");
+  utime_t sleeptime;
+  sleeptime.set_from_double(cct->_conf->osd_debug_deep_scrub_sleep);
 
   uint32_t fadvise_flags = CEPH_OSD_OP_FLAG_FADVISE_SEQUENTIAL |
                            CEPH_OSD_OP_FLAG_FADVISE_DONTNEED;
 
   while (true) {
+    if (sleeptime != utime_t()) {
+      lgeneric_derr(cct) << __func__ << " sleeping for " << sleeptime << dendl;
+      sleeptime.sleep();
+    }
     handle.reset_tp_timeout();
     r = store->read(
 	  ch,
-- 
2.39.5