--- /dev/null
+// -*- mode:C; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#include <errno.h>
+
+#include "include/utime.h"
+#include "objclass/objclass.h"
+
+#include "cls_user_ops.h"
+
+CLS_VER(1,0)
+CLS_NAME(user)
+
+static int write_entry(cls_method_context_t hctx, const string& key, const cls_user_bucket_entry& entry)
+{
+ bufferlist bl;
+ ::encode(entry, bl);
+
+ int ret = cls_cxx_map_set_val(hctx, key, &bl);
+ if (ret < 0)
+ return ret;
+
+ return 0;
+}
+
+static int remove_entry(cls_method_context_t hctx, const string& key)
+{
+ int ret = cls_cxx_map_remove_key(hctx, key);
+ if (ret < 0)
+ return ret;
+
+ return 0;
+}
+
+static void get_key_by_bucket_name(const string& bucket_name, string *key)
+{
+ *key = bucket_name;
+}
+
+static int get_existing_bucket_entry(cls_method_context_t hctx, const string& bucket_name,
+ cls_user_bucket_entry& entry)
+{
+ if (bucket_name.empty()) {
+ return -EINVAL;
+ }
+
+ string key;
+ get_key_by_bucket_name(bucket_name, &key);
+
+ bufferlist bl;
+ int rc = cls_cxx_map_get_val(hctx, key, &bl);
+ if (rc < 0) {
+ CLS_LOG(10, "could not read entry %s", key.c_str());
+ return rc;
+ }
+ try {
+ bufferlist::iterator iter = bl.begin();
+ ::decode(entry, iter);
+ } catch (buffer::error& err) {
+ CLS_LOG(0, "ERROR: failed to decode entry %s", key.c_str());
+ return -EIO;
+ }
+
+ return 0;
+}
+
+static int read_header(cls_method_context_t hctx, cls_user_header *header)
+{
+ bufferlist bl;
+
+ int ret = cls_cxx_map_read_header(hctx, &bl);
+ if (ret < 0)
+ return ret;
+
+ if (bl.length() == 0) {
+ *header = cls_user_header();
+ return 0;
+ }
+
+ try {
+ ::decode(*header, bl);
+ } catch (buffer::error& err) {
+ CLS_LOG(0, "ERROR: failed to decode user header");
+ return -EIO;
+ }
+
+ return 0;
+}
+
+static void add_header_stats(cls_user_stats *stats, cls_user_bucket_entry& entry)
+{
+ stats->total_entries += entry.count;
+ stats->total_bytes += entry.size;
+ stats->total_bytes_rounded += entry.size_rounded;
+}
+
+static void dec_header_stats(cls_user_stats *stats, cls_user_bucket_entry& entry)
+{
+ stats->total_bytes -= entry.size;
+ stats->total_bytes_rounded -= entry.size_rounded;
+ stats->total_entries -= entry.count;
+}
+
+static void apply_entry_stats(const cls_user_bucket_entry& src_entry, cls_user_bucket_entry *target_entry)
+{
+ target_entry->size = src_entry.size;
+ target_entry->size_rounded = src_entry.size_rounded;
+ target_entry->count = src_entry.count;
+}
+
+static int cls_user_set_buckets_info(cls_method_context_t hctx, bufferlist *in, bufferlist *out)
+{
+ bufferlist::iterator in_iter = in->begin();
+
+ cls_user_set_buckets_op op;
+ try {
+ ::decode(op, in_iter);
+ } catch (buffer::error& err) {
+ CLS_LOG(1, "ERROR: cls_user_add_op(): failed to decode op");
+ return -EINVAL;
+ }
+
+ cls_user_header header;
+ int ret = read_header(hctx, &header);
+ if (ret < 0) {
+ CLS_LOG(0, "ERROR: failed to read user info header ret=%d", ret);
+ return ret;
+ }
+
+ for (list<cls_user_bucket_entry>::iterator iter = op.entries.begin();
+ iter != op.entries.end(); ++iter) {
+ cls_user_bucket_entry& update_entry = *iter;
+
+ string key;
+
+ get_key_by_bucket_name(update_entry.bucket.name, &key);
+
+ cls_user_bucket_entry entry;
+ ret = get_existing_bucket_entry(hctx, key, entry);
+
+ if (ret == -ENOENT) {
+ if (!op.add)
+ continue; /* racing bucket removal */
+
+ entry = update_entry;
+
+ ret = 0;
+ }
+
+ if (ret < 0) {
+ CLS_LOG(0, "ERROR: get_existing_bucket_entry() key=%s returned %d", key.c_str(), ret);
+ return ret;
+ } else if (ret >= 0 && entry.user_stats_sync) {
+ dec_header_stats(&header.stats, entry);
+ }
+
+ CLS_LOG(20, "storing entry for key=%s size=%lld count=%lld",
+ key.c_str(), (long long)update_entry.size, (long long)update_entry.count);
+
+ // sync entry stats when not an op.add, as when the case is op.add if its a
+ // new entry we already have copied update_entry earlier, OTOH, for an existing entry
+ // we end up clobbering the existing stats for the bucket
+ if (!op.add){
+ apply_entry_stats(update_entry, &entry);
+ }
+ entry.user_stats_sync = true;
+
+ ret = write_entry(hctx, key, entry);
+ if (ret < 0)
+ return ret;
+
+ add_header_stats(&header.stats, entry);
+ }
+
+ bufferlist bl;
+
+ CLS_LOG(20, "header: total bytes=%lld entries=%lld", (long long)header.stats.total_bytes, (long long)header.stats.total_entries);
+
+ if (header.last_stats_update < op.time)
+ header.last_stats_update = op.time;
+
+ ::encode(header, bl);
+
+ ret = cls_cxx_map_write_header(hctx, &bl);
+ if (ret < 0)
+ return ret;
+
+ return 0;
+}
+
+static int cls_user_complete_stats_sync(cls_method_context_t hctx, bufferlist *in, bufferlist *out)
+{
+ bufferlist::iterator in_iter = in->begin();
+
+ cls_user_complete_stats_sync_op op;
+ try {
+ ::decode(op, in_iter);
+ } catch (buffer::error& err) {
+ CLS_LOG(1, "ERROR: cls_user_add_op(): failed to decode op");
+ return -EINVAL;
+ }
+
+ cls_user_header header;
+ int ret = read_header(hctx, &header);
+ if (ret < 0) {
+ CLS_LOG(0, "ERROR: failed to read user info header ret=%d", ret);
+ return ret;
+ }
+
+ if (header.last_stats_sync < op.time)
+ header.last_stats_sync = op.time;
+
+ bufferlist bl;
+
+ ::encode(header, bl);
+
+ ret = cls_cxx_map_write_header(hctx, &bl);
+ if (ret < 0)
+ return ret;
+
+ return 0;
+}
+
+static int cls_user_remove_bucket(cls_method_context_t hctx, bufferlist *in, bufferlist *out)
+{
+ bufferlist::iterator in_iter = in->begin();
+
+ cls_user_remove_bucket_op op;
+ try {
+ ::decode(op, in_iter);
+ } catch (buffer::error& err) {
+ CLS_LOG(1, "ERROR: cls_user_add_op(): failed to decode op");
+ return -EINVAL;
+ }
+
+ cls_user_header header;
+ int ret = read_header(hctx, &header);
+ if (ret < 0) {
+ CLS_LOG(0, "ERROR: failed to read user info header ret=%d", ret);
+ return ret;
+ }
+
+ string key;
+
+ get_key_by_bucket_name(op.bucket.name, &key);
+
+ cls_user_bucket_entry entry;
+ ret = get_existing_bucket_entry(hctx, key, entry);
+ if (ret == -ENOENT) {
+ return 0; /* idempotent removal */
+ }
+ if (ret < 0) {
+ CLS_LOG(0, "ERROR: get existing bucket entry, key=%s ret=%d", key.c_str(), ret);
+ return ret;
+ }
+
+ if (entry.user_stats_sync) {
+ dec_header_stats(&header.stats, entry);
+ }
+
+ CLS_LOG(20, "removing entry at %s", key.c_str());
+
+ ret = remove_entry(hctx, key);
+ if (ret < 0)
+ return ret;
+
+ return 0;
+}
+
+static int cls_user_list_buckets(cls_method_context_t hctx, bufferlist *in, bufferlist *out)
+{
+ bufferlist::iterator in_iter = in->begin();
+
+ cls_user_list_buckets_op op;
+ try {
+ ::decode(op, in_iter);
+ } catch (buffer::error& err) {
+ CLS_LOG(1, "ERROR: cls_user_list_op(): failed to decode op");
+ return -EINVAL;
+ }
+
+ map<string, bufferlist> keys;
+
+ const string& from_index = op.marker;
+ const string& to_index = op.end_marker;
+ const bool to_index_valid = !to_index.empty();
+
+#define MAX_ENTRIES 1000
+ size_t max_entries = op.max_entries;
+ if (max_entries > MAX_ENTRIES)
+ max_entries = MAX_ENTRIES;
+
+ string match_prefix;
+ cls_user_list_buckets_ret ret;
+
+ int rc = cls_cxx_map_get_vals(hctx, from_index, match_prefix, max_entries, &keys, &ret.truncated);
+ if (rc < 0)
+ return rc;
+
+ CLS_LOG(20, "from_index=%s to_index=%s match_prefix=%s",
+ from_index.c_str(),
+ to_index.c_str(),
+ match_prefix.c_str());
+
+ list<cls_user_bucket_entry>& entries = ret.entries;
+ map<string, bufferlist>::iterator iter = keys.begin();
+
+ string marker;
+
+ for (; iter != keys.end(); ++iter) {
+ const string& index = iter->first;
+ marker = index;
+
+ if (to_index_valid && to_index.compare(index) <= 0) {
+ ret.truncated = false;
+ break;
+ }
+
+ bufferlist& bl = iter->second;
+ bufferlist::iterator biter = bl.begin();
+ try {
+ cls_user_bucket_entry e;
+ ::decode(e, biter);
+ entries.push_back(e);
+ } catch (buffer::error& err) {
+ CLS_LOG(0, "ERROR: cls_user_list: could not decode entry, index=%s", index.c_str());
+ }
+ }
+
+ if (ret.truncated) {
+ ret.marker = marker;
+ }
+
+ ::encode(ret, *out);
+
+ return 0;
+}
+
+static int cls_user_get_header(cls_method_context_t hctx, bufferlist *in, bufferlist *out)
+{
+ bufferlist::iterator in_iter = in->begin();
+
+ cls_user_get_header_op op;
+ try {
+ ::decode(op, in_iter);
+ } catch (buffer::error& err) {
+ CLS_LOG(1, "ERROR: cls_user_get_header_op(): failed to decode op");
+ return -EINVAL;
+ }
+
+ cls_user_get_header_ret op_ret;
+
+ int ret = read_header(hctx, &op_ret.header);
+ if (ret < 0)
+ return ret;
+
+ ::encode(op_ret, *out);
+
+ return 0;
+}
+
+CLS_INIT(user)
+{
+ CLS_LOG(1, "Loaded user class!");
+
+ cls_handle_t h_class;
+ cls_method_handle_t h_user_set_buckets_info;
+ cls_method_handle_t h_user_complete_stats_sync;
+ cls_method_handle_t h_user_remove_bucket;
+ cls_method_handle_t h_user_list_buckets;
+ cls_method_handle_t h_user_get_header;
+
+ cls_register("user", &h_class);
+
+ /* log */
+ cls_register_cxx_method(h_class, "set_buckets_info", CLS_METHOD_RD | CLS_METHOD_WR,
+ cls_user_set_buckets_info, &h_user_set_buckets_info);
+ cls_register_cxx_method(h_class, "complete_stats_sync", CLS_METHOD_RD | CLS_METHOD_WR,
+ cls_user_complete_stats_sync, &h_user_complete_stats_sync);
+ cls_register_cxx_method(h_class, "remove_bucket", CLS_METHOD_RD | CLS_METHOD_WR, cls_user_remove_bucket, &h_user_remove_bucket);
+ cls_register_cxx_method(h_class, "list_buckets", CLS_METHOD_RD, cls_user_list_buckets, &h_user_list_buckets);
+ cls_register_cxx_method(h_class, "get_header", CLS_METHOD_RD, cls_user_get_header, &h_user_get_header);
+
+ return;
+}
+
Code Review / stor4nfv.git / blobdiff