--- /dev/null
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#include "test/librados_test_stub/TestMemIoCtxImpl.h"
+#include "test/librados_test_stub/TestMemRadosClient.h"
+#include "common/Clock.h"
+#include "common/RWLock.h"
+#include "include/err.h"
+#include <boost/algorithm/string/predicate.hpp>
+#include <boost/bind.hpp>
+#include <errno.h>
+#include <include/compat.h>
+
+static void to_vector(const interval_set<uint64_t> &set,
+ std::vector<std::pair<uint64_t, uint64_t> > *vec) {
+ vec->clear();
+ for (interval_set<uint64_t>::const_iterator it = set.begin();
+ it != set.end(); ++it) {
+ vec->push_back(*it);
+ }
+}
+
+namespace librados {
+
+TestMemIoCtxImpl::TestMemIoCtxImpl() {
+}
+
+TestMemIoCtxImpl::TestMemIoCtxImpl(const TestMemIoCtxImpl& rhs)
+ : TestIoCtxImpl(rhs), m_client(rhs.m_client), m_pool(rhs.m_pool) {
+ m_pool->get();
+}
+
+TestMemIoCtxImpl::TestMemIoCtxImpl(TestMemRadosClient *client, int64_t pool_id,
+ const std::string& pool_name,
+ TestMemCluster::Pool *pool)
+ : TestIoCtxImpl(client, pool_id, pool_name), m_client(client),
+ m_pool(pool) {
+ m_pool->get();
+}
+
+TestMemIoCtxImpl::~TestMemIoCtxImpl() {
+ m_pool->put();
+}
+
+TestIoCtxImpl *TestMemIoCtxImpl::clone() {
+ return new TestMemIoCtxImpl(*this);
+}
+
+int TestMemIoCtxImpl::aio_remove(const std::string& oid, AioCompletionImpl *c) {
+ m_client->add_aio_operation(oid, true,
+ boost::bind(&TestMemIoCtxImpl::remove, this, oid,
+ get_snap_context()),
+ c);
+ return 0;
+}
+
+int TestMemIoCtxImpl::append(const std::string& oid, const bufferlist &bl,
+ const SnapContext &snapc) {
+ if (get_snap_read() != CEPH_NOSNAP) {
+ return -EROFS;
+ } else if (m_client->is_blacklisted()) {
+ return -EBLACKLISTED;
+ }
+
+ TestMemCluster::SharedFile file;
+ {
+ RWLock::WLocker l(m_pool->file_lock);
+ file = get_file(oid, true, snapc);
+ }
+
+ RWLock::WLocker l(file->lock);
+ file->data.append(bl);
+ return 0;
+}
+
+int TestMemIoCtxImpl::assert_exists(const std::string &oid) {
+ if (m_client->is_blacklisted()) {
+ return -EBLACKLISTED;
+ }
+
+ RWLock::RLocker l(m_pool->file_lock);
+ TestMemCluster::SharedFile file = get_file(oid, false, get_snap_context());
+ if (file == NULL) {
+ return -ENOENT;
+ }
+ return 0;
+}
+
+int TestMemIoCtxImpl::create(const std::string& oid, bool exclusive) {
+ if (get_snap_read() != CEPH_NOSNAP) {
+ return -EROFS;
+ } else if (m_client->is_blacklisted()) {
+ return -EBLACKLISTED;
+ }
+
+ RWLock::WLocker l(m_pool->file_lock);
+ get_file(oid, true, get_snap_context());
+ return 0;
+}
+
+int TestMemIoCtxImpl::list_snaps(const std::string& oid, snap_set_t *out_snaps) {
+ if (m_client->is_blacklisted()) {
+ return -EBLACKLISTED;
+ }
+
+ out_snaps->seq = 0;
+ out_snaps->clones.clear();
+
+ RWLock::RLocker l(m_pool->file_lock);
+ TestMemCluster::Files::iterator it = m_pool->files.find(oid);
+ if (it == m_pool->files.end()) {
+ return -ENOENT;
+ }
+
+ bool include_head = false;
+ TestMemCluster::FileSnapshots &file_snaps = it->second;
+ for (TestMemCluster::FileSnapshots::iterator s_it = file_snaps.begin();
+ s_it != file_snaps.end(); ++s_it) {
+ TestMemCluster::File &file = *s_it->get();
+
+ if (file_snaps.size() > 1) {
+ out_snaps->seq = file.snap_id;
+ TestMemCluster::FileSnapshots::iterator next_it(s_it);
+ ++next_it;
+ if (next_it == file_snaps.end()) {
+ include_head = true;
+ break;
+ }
+
+ ++out_snaps->seq;
+ if (!file.exists) {
+ continue;
+ }
+
+ // update the overlap with the next version's overlap metadata
+ TestMemCluster::File &next_file = *next_it->get();
+ interval_set<uint64_t> overlap;
+ if (next_file.exists) {
+ overlap = next_file.snap_overlap;
+ }
+
+ clone_info_t clone;
+ clone.cloneid = file.snap_id;
+ clone.snaps = file.snaps;
+ to_vector(overlap, &clone.overlap);
+ clone.size = file.data.length();
+ out_snaps->clones.push_back(clone);
+ }
+ }
+
+ if ((file_snaps.size() == 1 && file_snaps.back()->data.length() > 0) ||
+ include_head)
+ {
+ // Include the SNAP_HEAD
+ TestMemCluster::File &file = *file_snaps.back();
+ if (file.exists) {
+ RWLock::RLocker l2(file.lock);
+ if (out_snaps->seq == 0 && !include_head) {
+ out_snaps->seq = file.snap_id;
+ }
+ clone_info_t head_clone;
+ head_clone.cloneid = librados::SNAP_HEAD;
+ head_clone.size = file.data.length();
+ out_snaps->clones.push_back(head_clone);
+ }
+ }
+ return 0;
+
+}
+
+int TestMemIoCtxImpl::omap_get_vals2(const std::string& oid,
+ const std::string& start_after,
+ const std::string &filter_prefix,
+ uint64_t max_return,
+ std::map<std::string, bufferlist> *out_vals,
+ bool *pmore) {
+ if (out_vals == NULL) {
+ return -EINVAL;
+ } else if (m_client->is_blacklisted()) {
+ return -EBLACKLISTED;
+ }
+
+ TestMemCluster::SharedFile file;
+ {
+ RWLock::RLocker l(m_pool->file_lock);
+ file = get_file(oid, false, get_snap_context());
+ if (file == NULL) {
+ return -ENOENT;
+ }
+ }
+
+ out_vals->clear();
+
+ RWLock::RLocker l(file->lock);
+ TestMemCluster::FileOMaps::iterator o_it = m_pool->file_omaps.find(oid);
+ if (o_it == m_pool->file_omaps.end()) {
+ if (pmore) {
+ *pmore = false;
+ }
+ return 0;
+ }
+
+ TestMemCluster::OMap &omap = o_it->second;
+ TestMemCluster::OMap::iterator it = omap.begin();
+ if (!start_after.empty()) {
+ it = omap.upper_bound(start_after);
+ }
+
+ while (it != omap.end() && max_return > 0) {
+ if (filter_prefix.empty() ||
+ boost::algorithm::starts_with(it->first, filter_prefix)) {
+ (*out_vals)[it->first] = it->second;
+ --max_return;
+ }
+ ++it;
+ }
+ if (pmore) {
+ *pmore = (it != omap.end());
+ }
+ return 0;
+}
+
+int TestMemIoCtxImpl::omap_get_vals(const std::string& oid,
+ const std::string& start_after,
+ const std::string &filter_prefix,
+ uint64_t max_return,
+ std::map<std::string, bufferlist> *out_vals) {
+ return omap_get_vals2(oid, start_after, filter_prefix, max_return, out_vals, nullptr);
+}
+
+int TestMemIoCtxImpl::omap_rm_keys(const std::string& oid,
+ const std::set<std::string>& keys) {
+ if (get_snap_read() != CEPH_NOSNAP) {
+ return -EROFS;
+ } else if (m_client->is_blacklisted()) {
+ return -EBLACKLISTED;
+ }
+
+ TestMemCluster::SharedFile file;
+ {
+ RWLock::WLocker l(m_pool->file_lock);
+ file = get_file(oid, true, get_snap_context());
+ if (file == NULL) {
+ return -ENOENT;
+ }
+ }
+
+ RWLock::WLocker l(file->lock);
+ for (std::set<std::string>::iterator it = keys.begin();
+ it != keys.end(); ++it) {
+ m_pool->file_omaps[oid].erase(*it);
+ }
+ return 0;
+}
+
+int TestMemIoCtxImpl::omap_set(const std::string& oid,
+ const std::map<std::string, bufferlist> &map) {
+ if (get_snap_read() != CEPH_NOSNAP) {
+ return -EROFS;
+ } else if (m_client->is_blacklisted()) {
+ return -EBLACKLISTED;
+ }
+
+ TestMemCluster::SharedFile file;
+ {
+ RWLock::WLocker l(m_pool->file_lock);
+ file = get_file(oid, true, get_snap_context());
+ if (file == NULL) {
+ return -ENOENT;
+ }
+ }
+
+ RWLock::WLocker l(file->lock);
+ for (std::map<std::string, bufferlist>::const_iterator it = map.begin();
+ it != map.end(); ++it) {
+ bufferlist bl;
+ bl.append(it->second);
+ m_pool->file_omaps[oid][it->first] = bl;
+ }
+
+ return 0;
+}
+
+int TestMemIoCtxImpl::read(const std::string& oid, size_t len, uint64_t off,
+ bufferlist *bl) {
+ if (m_client->is_blacklisted()) {
+ return -EBLACKLISTED;
+ }
+
+ TestMemCluster::SharedFile file;
+ {
+ RWLock::RLocker l(m_pool->file_lock);
+ file = get_file(oid, false, get_snap_context());
+ if (file == NULL) {
+ return -ENOENT;
+ }
+ }
+
+ RWLock::RLocker l(file->lock);
+ if (len == 0) {
+ len = file->data.length();
+ }
+ len = clip_io(off, len, file->data.length());
+ if (bl != NULL && len > 0) {
+ bufferlist bit;
+ bit.substr_of(file->data, off, len);
+ append_clone(bit, bl);
+ }
+ return len;
+}
+
+int TestMemIoCtxImpl::remove(const std::string& oid, const SnapContext &snapc) {
+ if (get_snap_read() != CEPH_NOSNAP) {
+ return -EROFS;
+ } else if (m_client->is_blacklisted()) {
+ return -EBLACKLISTED;
+ }
+
+ RWLock::WLocker l(m_pool->file_lock);
+ TestMemCluster::SharedFile file = get_file(oid, false, snapc);
+ if (file == NULL) {
+ return -ENOENT;
+ }
+ file = get_file(oid, true, snapc);
+
+ RWLock::WLocker l2(file->lock);
+ file->exists = false;
+
+ TestMemCluster::Files::iterator it = m_pool->files.find(oid);
+ assert(it != m_pool->files.end());
+ if (it->second.size() == 1) {
+ m_pool->files.erase(it);
+ m_pool->file_omaps.erase(oid);
+ }
+ return 0;
+}
+
+int TestMemIoCtxImpl::selfmanaged_snap_create(uint64_t *snapid) {
+ if (m_client->is_blacklisted()) {
+ return -EBLACKLISTED;
+ }
+
+ RWLock::WLocker l(m_pool->file_lock);
+ *snapid = ++m_pool->snap_id;
+ m_pool->snap_seqs.insert(*snapid);
+ return 0;
+}
+
+int TestMemIoCtxImpl::selfmanaged_snap_remove(uint64_t snapid) {
+ if (m_client->is_blacklisted()) {
+ return -EBLACKLISTED;
+ }
+
+ RWLock::WLocker l(m_pool->file_lock);
+ TestMemCluster::SnapSeqs::iterator it =
+ m_pool->snap_seqs.find(snapid);
+ if (it == m_pool->snap_seqs.end()) {
+ return -ENOENT;
+ }
+
+ // TODO clean up all file snapshots
+ m_pool->snap_seqs.erase(it);
+ return 0;
+}
+
+int TestMemIoCtxImpl::selfmanaged_snap_rollback(const std::string& oid,
+ uint64_t snapid) {
+ if (m_client->is_blacklisted()) {
+ return -EBLACKLISTED;
+ }
+
+ RWLock::WLocker l(m_pool->file_lock);
+
+ TestMemCluster::SharedFile file;
+ TestMemCluster::Files::iterator f_it = m_pool->files.find(oid);
+ if (f_it == m_pool->files.end()) {
+ return 0;
+ }
+
+ TestMemCluster::FileSnapshots &snaps = f_it->second;
+ file = snaps.back();
+
+ size_t versions = 0;
+ for (TestMemCluster::FileSnapshots::reverse_iterator it = snaps.rbegin();
+ it != snaps.rend(); ++it) {
+ TestMemCluster::SharedFile file = *it;
+ if (file->snap_id < get_snap_read()) {
+ if (versions == 0) {
+ // already at the snapshot version
+ return 0;
+ } else if (file->snap_id == CEPH_NOSNAP) {
+ if (versions == 1) {
+ // delete it current HEAD, next one is correct version
+ snaps.erase(it.base());
+ } else {
+ // overwrite contents of current HEAD
+ file = TestMemCluster::SharedFile (new TestMemCluster::File(**it));
+ file->snap_id = CEPH_NOSNAP;
+ *it = file;
+ }
+ } else {
+ // create new head version
+ file = TestMemCluster::SharedFile (new TestMemCluster::File(**it));
+ file->snap_id = m_pool->snap_id;
+ snaps.push_back(file);
+ }
+ return 0;
+ }
+ ++versions;
+ }
+ return 0;
+}
+
+int TestMemIoCtxImpl::sparse_read(const std::string& oid, uint64_t off,
+ uint64_t len,
+ std::map<uint64_t,uint64_t> *m,
+ bufferlist *data_bl) {
+ if (m_client->is_blacklisted()) {
+ return -EBLACKLISTED;
+ }
+
+ // TODO verify correctness
+ TestMemCluster::SharedFile file;
+ {
+ RWLock::RLocker l(m_pool->file_lock);
+ file = get_file(oid, false, get_snap_context());
+ if (file == NULL) {
+ return -ENOENT;
+ }
+ }
+
+ RWLock::RLocker l(file->lock);
+ len = clip_io(off, len, file->data.length());
+ if (m != NULL) {
+ m->clear();
+ if (len > 0) {
+ (*m)[off] = len;
+ }
+ }
+ if (data_bl != NULL && len > 0) {
+ bufferlist bit;
+ bit.substr_of(file->data, off, len);
+ append_clone(bit, data_bl);
+ }
+ return 0;
+}
+
+int TestMemIoCtxImpl::stat(const std::string& oid, uint64_t *psize,
+ time_t *pmtime) {
+ if (m_client->is_blacklisted()) {
+ return -EBLACKLISTED;
+ }
+
+ TestMemCluster::SharedFile file;
+ {
+ RWLock::RLocker l(m_pool->file_lock);
+ file = get_file(oid, false, get_snap_context());
+ if (file == NULL) {
+ return -ENOENT;
+ }
+ }
+
+ RWLock::RLocker l(file->lock);
+ if (psize != NULL) {
+ *psize = file->data.length();
+ }
+ if (pmtime != NULL) {
+ *pmtime = file->mtime;
+ }
+ return 0;
+}
+
+int TestMemIoCtxImpl::truncate(const std::string& oid, uint64_t size,
+ const SnapContext &snapc) {
+ if (get_snap_read() != CEPH_NOSNAP) {
+ return -EROFS;
+ } else if (m_client->is_blacklisted()) {
+ return -EBLACKLISTED;
+ }
+
+ TestMemCluster::SharedFile file;
+ {
+ RWLock::WLocker l(m_pool->file_lock);
+ file = get_file(oid, true, snapc);
+ }
+
+ RWLock::WLocker l(file->lock);
+ bufferlist bl(size);
+
+ interval_set<uint64_t> is;
+ if (file->data.length() > size) {
+ is.insert(size, file->data.length() - size);
+
+ bl.substr_of(file->data, 0, size);
+ file->data.swap(bl);
+ } else if (file->data.length() != size) {
+ if (size == 0) {
+ bl.clear();
+ } else {
+ is.insert(0, size);
+
+ bl.append_zero(size - file->data.length());
+ file->data.append(bl);
+ }
+ }
+ is.intersection_of(file->snap_overlap);
+ file->snap_overlap.subtract(is);
+ return 0;
+}
+
+int TestMemIoCtxImpl::write(const std::string& oid, bufferlist& bl, size_t len,
+ uint64_t off, const SnapContext &snapc) {
+ if (get_snap_read() != CEPH_NOSNAP) {
+ return -EROFS;
+ } else if (m_client->is_blacklisted()) {
+ return -EBLACKLISTED;
+ }
+
+ TestMemCluster::SharedFile file;
+ {
+ RWLock::WLocker l(m_pool->file_lock);
+ file = get_file(oid, true, snapc);
+ }
+
+ RWLock::WLocker l(file->lock);
+ if (len > 0) {
+ interval_set<uint64_t> is;
+ is.insert(off, len);
+ is.intersection_of(file->snap_overlap);
+ file->snap_overlap.subtract(is);
+ }
+
+ ensure_minimum_length(off + len, &file->data);
+ file->data.copy_in(off, len, bl);
+ return 0;
+}
+
+int TestMemIoCtxImpl::write_full(const std::string& oid, bufferlist& bl,
+ const SnapContext &snapc) {
+ if (get_snap_read() != CEPH_NOSNAP) {
+ return -EROFS;
+ } else if (m_client->is_blacklisted()) {
+ return -EBLACKLISTED;
+ }
+
+ TestMemCluster::SharedFile file;
+ {
+ RWLock::WLocker l(m_pool->file_lock);
+ file = get_file(oid, true, snapc);
+ if (file == NULL) {
+ return -ENOENT;
+ }
+ }
+
+ RWLock::WLocker l(file->lock);
+ if (bl.length() > 0) {
+ interval_set<uint64_t> is;
+ is.insert(0, bl.length());
+ is.intersection_of(file->snap_overlap);
+ file->snap_overlap.subtract(is);
+ }
+
+ file->data.clear();
+ file->data.append(bl);
+ return 0;
+}
+
+int TestMemIoCtxImpl::writesame(const std::string& oid, bufferlist& bl, size_t len,
+ uint64_t off, const SnapContext &snapc) {
+ if (get_snap_read() != CEPH_NOSNAP) {
+ return -EROFS;
+ } else if (m_client->is_blacklisted()) {
+ return -EBLACKLISTED;
+ }
+
+ if (len == 0 || (len % bl.length())) {
+ return -EINVAL;
+ }
+
+ TestMemCluster::SharedFile file;
+ {
+ RWLock::WLocker l(m_pool->file_lock);
+ file = get_file(oid, true, snapc);
+ }
+
+ RWLock::WLocker l(file->lock);
+ if (len > 0) {
+ interval_set<uint64_t> is;
+ is.insert(off, len);
+ is.intersection_of(file->snap_overlap);
+ file->snap_overlap.subtract(is);
+ }
+
+ ensure_minimum_length(off + len, &file->data);
+ while (len > 0) {
+ file->data.copy_in(off, bl.length(), bl);
+ off += bl.length();
+ len -= bl.length();
+ }
+ return 0;
+}
+
+int TestMemIoCtxImpl::cmpext(const std::string& oid, uint64_t off,
+ bufferlist& cmp_bl) {
+ if (get_snap_read() != CEPH_NOSNAP) {
+ return -EROFS;
+ } else if (m_client->is_blacklisted()) {
+ return -EBLACKLISTED;
+ }
+
+ if (cmp_bl.length() == 0) {
+ return -EINVAL;
+ }
+
+ TestMemCluster::SharedFile file;
+ {
+ RWLock::WLocker l(m_pool->file_lock);
+ file = get_file(oid, true, get_snap_context());
+ }
+
+ RWLock::RLocker l(file->lock);
+ size_t len = cmp_bl.length();
+ ensure_minimum_length(off + len, &file->data);
+ if (len > 0 && off <= len) {
+ for (uint64_t p = off; p < len; p++) {
+ if (file->data[p] != cmp_bl[p])
+ return -MAX_ERRNO - p;
+ }
+ }
+ return 0;
+}
+
+int TestMemIoCtxImpl::xattr_get(const std::string& oid,
+ std::map<std::string, bufferlist>* attrset) {
+ if (m_client->is_blacklisted()) {
+ return -EBLACKLISTED;
+ }
+
+ TestMemCluster::SharedFile file;
+ RWLock::RLocker l(m_pool->file_lock);
+ TestMemCluster::FileXAttrs::iterator it = m_pool->file_xattrs.find(oid);
+ if (it == m_pool->file_xattrs.end()) {
+ return -ENODATA;
+ }
+ *attrset = it->second;
+ return 0;
+}
+
+int TestMemIoCtxImpl::xattr_set(const std::string& oid, const std::string &name,
+ bufferlist& bl) {
+ if (m_client->is_blacklisted()) {
+ return -EBLACKLISTED;
+ }
+
+ RWLock::WLocker l(m_pool->file_lock);
+ m_pool->file_xattrs[oid][name] = bl;
+ return 0;
+}
+
+int TestMemIoCtxImpl::zero(const std::string& oid, uint64_t off, uint64_t len) {
+ if (m_client->is_blacklisted()) {
+ return -EBLACKLISTED;
+ }
+
+ bool truncate_redirect = false;
+ TestMemCluster::SharedFile file;
+ {
+ RWLock::WLocker l(m_pool->file_lock);
+ file = get_file(oid, false, get_snap_context());
+ if (!file) {
+ return 0;
+ }
+ file = get_file(oid, true, get_snap_context());
+
+ RWLock::RLocker l2(file->lock);
+ if (len > 0 && off + len >= file->data.length()) {
+ // Zero -> Truncate logic embedded in OSD
+ truncate_redirect = true;
+ }
+ }
+ if (truncate_redirect) {
+ return truncate(oid, off, get_snap_context());
+ }
+
+ bufferlist bl;
+ bl.append_zero(len);
+ return write(oid, bl, len, off, get_snap_context());
+}
+
+void TestMemIoCtxImpl::append_clone(bufferlist& src, bufferlist* dest) {
+ // deep-copy the src to ensure our memory-based mock RADOS data cannot
+ // be modified by callers
+ if (src.length() > 0) {
+ bufferlist::iterator iter = src.begin();
+ buffer::ptr ptr;
+ iter.copy_deep(src.length(), ptr);
+ dest->append(ptr);
+ }
+}
+
+size_t TestMemIoCtxImpl::clip_io(size_t off, size_t len, size_t bl_len) {
+ if (off >= bl_len) {
+ len = 0;
+ } else if (off + len > bl_len) {
+ len = bl_len - off;
+ }
+ return len;
+}
+
+void TestMemIoCtxImpl::ensure_minimum_length(size_t len, bufferlist *bl) {
+ if (len > bl->length()) {
+ bufferptr ptr(buffer::create(len - bl->length()));
+ ptr.zero();
+ bl->append(ptr);
+ }
+}
+
+TestMemCluster::SharedFile TestMemIoCtxImpl::get_file(
+ const std::string &oid, bool write, const SnapContext &snapc) {
+ assert(m_pool->file_lock.is_locked() || m_pool->file_lock.is_wlocked());
+ assert(!write || m_pool->file_lock.is_wlocked());
+
+ TestMemCluster::SharedFile file;
+ TestMemCluster::Files::iterator it = m_pool->files.find(oid);
+ if (it != m_pool->files.end()) {
+ file = it->second.back();
+ } else if (!write) {
+ return TestMemCluster::SharedFile();
+ }
+
+ if (write) {
+ bool new_version = false;
+ if (!file || !file->exists) {
+ file = TestMemCluster::SharedFile(new TestMemCluster::File());
+ new_version = true;
+ } else {
+ if (!snapc.snaps.empty() && file->snap_id < snapc.seq) {
+ for (std::vector<snapid_t>::const_reverse_iterator seq_it =
+ snapc.snaps.rbegin();
+ seq_it != snapc.snaps.rend(); ++seq_it) {
+ if (*seq_it > file->snap_id && *seq_it <= snapc.seq) {
+ file->snaps.push_back(*seq_it);
+ }
+ }
+
+ bufferlist prev_data = file->data;
+ file = TestMemCluster::SharedFile(
+ new TestMemCluster::File(*file));
+ file->data.clear();
+ append_clone(prev_data, &file->data);
+ if (prev_data.length() > 0) {
+ file->snap_overlap.insert(0, prev_data.length());
+ }
+ new_version = true;
+ }
+ }
+
+ if (new_version) {
+ file->snap_id = snapc.seq;
+ file->mtime = ceph_clock_now().sec();
+ m_pool->files[oid].push_back(file);
+ }
+ return file;
+ }
+
+ if (get_snap_read() == CEPH_NOSNAP) {
+ if (!file->exists) {
+ assert(it->second.size() > 1);
+ return TestMemCluster::SharedFile();
+ }
+ return file;
+ }
+
+ TestMemCluster::FileSnapshots &snaps = it->second;
+ for (TestMemCluster::FileSnapshots::reverse_iterator it = snaps.rbegin();
+ it != snaps.rend(); ++it) {
+ TestMemCluster::SharedFile file = *it;
+ if (file->snap_id < get_snap_read()) {
+ if (!file->exists) {
+ return TestMemCluster::SharedFile();
+ }
+ return file;
+ }
+ }
+ return TestMemCluster::SharedFile();
+}
+
+} // namespace librados
Code Review / stor4nfv.git / blobdiff