From a15f6e4cea5af9fc82c755120642634b68af5992 Mon Sep 17 00:00:00 2001
From: Jason Dillaman <dillaman@redhat.com>
Date: Mon, 19 Jun 2017 12:23:01 -0400
Subject: [PATCH] mon: store application metadata in pg_pool_t

Signed-off-by: Jason Dillaman <dillaman@redhat.com>
---
 src/mon/MonCommands.h | 25 +++++++++++++++++++++++++
 src/osd/osd_types.cc  | 33 ++++++++++++++++++++++++++++-----
 src/osd/osd_types.h   |  3 +++
 3 files changed, 56 insertions(+), 5 deletions(-)

diff --git a/src/mon/MonCommands.h b/src/mon/MonCommands.h
index b04b1b7b64d..66177ae1698 100644
--- a/src/mon/MonCommands.h
+++ b/src/mon/MonCommands.h
@@ -897,6 +897,31 @@ COMMAND("osd pool get-quota " \
         "name=pool,type=CephPoolname ",
         "obtain object or byte limits for pool",
         "osd", "r", "cli,rest")
+COMMAND("osd pool application enable " \
+        "name=pool,type=CephPoolname " \
+        "name=app,type=CephString,goodchars=[A-Za-z0-9-_.] " \
+	"name=force,type=CephChoices,strings=--yes-i-really-mean-it,req=false", \
+        "enable use of an application <app> [cephfs,rbd,rgw] on pool <poolname>",
+        "osd", "rw", "cli,rest")
+COMMAND("osd pool application disable " \
+        "name=pool,type=CephPoolname " \
+        "name=app,type=CephString " \
+	"name=force,type=CephChoices,strings=--yes-i-really-mean-it,req=false", \
+        "disables use of an application <app> on pool <poolname>",
+        "osd", "rw", "cli,rest")
+COMMAND("osd pool application set " \
+        "name=pool,type=CephPoolname " \
+        "name=app,type=CephString " \
+        "name=key,type=CephString,goodchars=[A-Za-z0-9-_.] " \
+        "name=value,type=CephString,goodchars=[A-Za-z0-9-_.=]",
+        "sets application <app> metadata key <key> to <value> on pool <poolname>",
+        "osd", "rw", "cli,rest")
+COMMAND("osd pool application rm " \
+        "name=pool,type=CephPoolname " \
+        "name=app,type=CephString " \
+        "name=key,type=CephString",
+        "removes application <app> metadata key <key> on pool <poolname>",
+        "osd", "rw", "cli,rest")
 COMMAND("osd utilization",
 	"get basic pg distribution stats",
 	"osd", "r", "cli,rest")
diff --git a/src/osd/osd_types.cc b/src/osd/osd_types.cc
index bbacdb38aa2..cda9e67f3be 100644
--- a/src/osd/osd_types.cc
+++ b/src/osd/osd_types.cc
@@ -1206,6 +1206,15 @@ void pg_pool_t::dump(Formatter *f) const
   f->open_object_section("options");
   opts.dump(f);
   f->close_section(); // options
+  f->open_object_section("application_metadata");
+  for (auto &app_pair : application_metadata) {
+    f->open_object_section(app_pair.first.c_str());
+    for (auto &kv_pair : app_pair.second) {
+      f->dump_string(kv_pair.first.c_str(), kv_pair.second);
+    }
+    f->close_section(); // application
+  }
+  f->close_section(); // application_metadata
 }
 
 void pg_pool_t::convert_to_pg_shards(const vector<int> &from, set<pg_shard_t>* to) const {
@@ -1505,15 +1514,13 @@ void pg_pool_t::encode(bufferlist& bl, uint64_t features) const
     return;
   }
 
-  uint8_t v = 25;
+  uint8_t v = 26;
   if (!(features & CEPH_FEATURE_NEW_OSDOP_ENCODING)) {
     // this was the first post-hammer thing we added; if it's missing, encode
     // like hammer.
     v = 21;
   }
-  if ((features &
-       (CEPH_FEATURE_RESEND_ON_SPLIT|CEPH_FEATURE_SERVER_JEWEL)) !=
-      (CEPH_FEATURE_RESEND_ON_SPLIT|CEPH_FEATURE_SERVER_JEWEL)) {
+  if (!HAVE_FEATURE(features, SERVER_LUMINOUS)) {
     v = 24;
   }
 
@@ -1581,12 +1588,15 @@ void pg_pool_t::encode(bufferlist& bl, uint64_t features) const
   if (v >= 25) {
     ::encode(last_force_op_resend, bl);
   }
+  if (v >= 26) {
+    ::encode(application_metadata, bl);
+  }
   ENCODE_FINISH(bl);
 }
 
 void pg_pool_t::decode(bufferlist::iterator& bl)
 {
-  DECODE_START_LEGACY_COMPAT_LEN(25, 5, 5, bl);
+  DECODE_START_LEGACY_COMPAT_LEN(26, 5, 5, bl);
   ::decode(type, bl);
   ::decode(size, bl);
   ::decode(crush_rule, bl);
@@ -1733,6 +1743,9 @@ void pg_pool_t::decode(bufferlist::iterator& bl)
   } else {
     last_force_op_resend = last_force_op_resend_preluminous;
   }
+  if (struct_v >= 26) {
+    ::decode(application_metadata, bl);
+  }
   DECODE_FINISH(bl);
   calc_pg_masks();
   calc_grade_table();
@@ -1796,6 +1809,7 @@ void pg_pool_t::generate_test_instances(list<pg_pool_t*>& o)
   a.erasure_code_profile = "profile in osdmap";
   a.expected_num_objects = 123456;
   a.fast_read = false;
+  a.application_metadata = {{"rbd", {{"key", "value"}}}};
   o.push_back(new pg_pool_t(a));
 }
 
@@ -1854,6 +1868,15 @@ ostream& operator<<(ostream& out, const pg_pool_t& p)
   if (p.fast_read)
     out << " fast_read " << p.fast_read;
   out << p.opts;
+  if (!p.application_metadata.empty()) {
+    out << " application ";
+    for (auto it = p.application_metadata.begin();
+         it != p.application_metadata.end(); ++it) {
+      if (it != p.application_metadata.begin())
+        out << ",";
+      out << it->first;
+    }
+  }
   return out;
 }
 
diff --git a/src/osd/osd_types.h b/src/osd/osd_types.h
index 2507e64b86c..1f4a032f826 100644
--- a/src/osd/osd_types.h
+++ b/src/osd/osd_types.h
@@ -1348,6 +1348,9 @@ public:
 
   pool_opts_t opts; ///< options
 
+  /// application -> key/value metadata
+  map<string, std::map<string, string>> application_metadata;
+
 private:
   vector<uint32_t> grade_table;
 
-- 
2.39.5