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// -*- mode:C; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab
#include <errno.h>
#include "objclass/objclass.h"
#include "cls_cas_ops.h"
#include "include/compat.h"
#include "osd/osd_types.h"
CLS_VER(1,0)
CLS_NAME(cas)
struct chunk_obj_refcount;
static int chunk_read_refcount(cls_method_context_t hctx, chunk_obj_refcount *objr)
{
bufferlist bl;
objr->refs.clear();
int ret = cls_cxx_getxattr(hctx, CHUNK_REFCOUNT_ATTR, &bl);
if (ret == -ENODATA) {
return 0;
}
if (ret < 0)
return ret;
try {
auto iter = bl.cbegin();
decode(*objr, iter);
} catch (buffer::error& err) {
CLS_LOG(0, "ERROR: chunk_read_refcount(): failed to decode refcount entry\n");
return -EIO;
}
return 0;
}
static int chunk_set_refcount(cls_method_context_t hctx, const struct chunk_obj_refcount& objr)
{
bufferlist bl;
encode(objr, bl);
int ret = cls_cxx_setxattr(hctx, CHUNK_REFCOUNT_ATTR, &bl);
if (ret < 0)
return ret;
return 0;
}
static int cls_rc_chunk_refcount_get(cls_method_context_t hctx, bufferlist *in, bufferlist *out)
{
auto in_iter = in->cbegin();
cls_chunk_refcount_get_op op;
try {
decode(op, in_iter);
} catch (buffer::error& err) {
CLS_LOG(1, "ERROR: cls_rc_refcount_get(): failed to decode entry\n");
return -EINVAL;
}
chunk_obj_refcount objr;
int ret = chunk_read_refcount(hctx, &objr);
if (ret < 0)
return ret;
CLS_LOG(10, "cls_rc_chunk_refcount_get() oid=%s\n", op.source.oid.name.c_str());
objr.refs.insert(op.source);
ret = chunk_set_refcount(hctx, objr);
if (ret < 0)
return ret;
return 0;
}
static int cls_rc_chunk_refcount_put(cls_method_context_t hctx, bufferlist *in, bufferlist *out)
{
auto in_iter = in->cbegin();
cls_chunk_refcount_put_op op;
try {
decode(op, in_iter);
} catch (buffer::error& err) {
CLS_LOG(1, "ERROR: cls_rc_chunk_refcount_put(): failed to decode entry\n");
return -EINVAL;
}
chunk_obj_refcount objr;
int ret = chunk_read_refcount(hctx, &objr);
if (ret < 0)
return ret;
if (objr.refs.empty()) {// shouldn't happen!
CLS_LOG(0, "ERROR: cls_rc_chunk_refcount_put() was called without any references!\n");
return -EINVAL;
}
CLS_LOG(10, "cls_rc_chunk_refcount_put() oid=%s\n", op.source.oid.name.c_str());
bool found = false;
for (auto &p : objr.refs) {
if (p == op.source) {
found = true;
break;
}
}
if (!found) {
return 0;
}
auto p = objr.refs.find(op.source);
objr.refs.erase(p);
if (objr.refs.empty()) {
return cls_cxx_remove(hctx);
}
ret = chunk_set_refcount(hctx, objr);
if (ret < 0)
return ret;
return 0;
}
static int cls_rc_chunk_refcount_set(cls_method_context_t hctx, bufferlist *in, bufferlist *out)
{
auto in_iter = in->cbegin();
cls_chunk_refcount_set_op op;
try {
decode(op, in_iter);
} catch (buffer::error& err) {
CLS_LOG(1, "ERROR: cls_chunk_refcount_set(): failed to decode entry\n");
return -EINVAL;
}
if (!op.refs.size()) {
return cls_cxx_remove(hctx);
}
chunk_obj_refcount objr;
objr.refs = op.refs;
int ret = chunk_set_refcount(hctx, objr);
if (ret < 0)
return ret;
return 0;
}
static int cls_rc_chunk_refcount_read(cls_method_context_t hctx, bufferlist *in, bufferlist *out)
{
chunk_obj_refcount objr;
cls_chunk_refcount_read_ret read_ret;
int ret = chunk_read_refcount(hctx, &objr);
if (ret < 0)
return ret;
for (auto &p : objr.refs) {
read_ret.refs.insert(p);
}
encode(read_ret, *out);
return 0;
}
static int cls_rc_write_or_get(cls_method_context_t hctx, bufferlist *in, bufferlist *out)
{
auto in_iter = in->cbegin();
hobject_t src_obj;
bufferlist indata, outdata;
ceph_osd_op op;
try {
decode (op, in_iter);
decode(src_obj, in_iter);
in_iter.copy(op.extent.length, indata);
}
catch (buffer::error& e) {
return -EINVAL;
}
CLS_LOG(10, " offset: %llu length: %llu \n",
static_cast<long long unsigned>(op.extent.offset),
static_cast<long long unsigned>(op.extent.length));
chunk_obj_refcount objr;
int ret = chunk_read_refcount(hctx, &objr);
if (ret == -ENOENT) {
objr.refs.insert(src_obj);
bufferlist set_bl;
encode(objr, set_bl);
ret = cls_cxx_chunk_write_and_set(hctx, op.extent.offset, op.extent.length, &indata, op.flags,
&set_bl, set_bl.length());
if (ret < 0)
return ret;
return 0;
}
objr.refs.insert(src_obj);
ret = chunk_set_refcount(hctx, objr);
if (ret < 0)
return ret;
return 0;
}
static int cls_rc_has_chunk(cls_method_context_t hctx, bufferlist *in, bufferlist *out)
{
auto in_iter = in->cbegin();
string fp_oid;
bufferlist indata, outdata;
try {
decode (fp_oid, in_iter);
}
catch (buffer::error& e) {
return -EINVAL;
}
CLS_LOG(10, " fp_oid: %s \n", fp_oid.c_str());
bool ret = cls_has_chunk(hctx, fp_oid);
if (ret) {
return 0;
}
return -ENOENT;
}
CLS_INIT(cas)
{
CLS_LOG(1, "Loaded cas class!");
cls_handle_t h_class;
cls_method_handle_t h_cas_write_or_get;
cls_method_handle_t h_chunk_refcount_get;
cls_method_handle_t h_chunk_refcount_put;
cls_method_handle_t h_chunk_refcount_set;
cls_method_handle_t h_chunk_refcount_read;
cls_method_handle_t h_chunk_has_chunk;
cls_register("cas", &h_class);
/* chunk refcount */
cls_register_cxx_method(h_class, "chunk_get", CLS_METHOD_RD | CLS_METHOD_WR, cls_rc_chunk_refcount_get,
&h_chunk_refcount_get);
cls_register_cxx_method(h_class, "chunk_put", CLS_METHOD_RD | CLS_METHOD_WR, cls_rc_chunk_refcount_put,
&h_chunk_refcount_put);
cls_register_cxx_method(h_class, "chunk_set", CLS_METHOD_RD | CLS_METHOD_WR, cls_rc_chunk_refcount_set,
&h_chunk_refcount_set);
cls_register_cxx_method(h_class, "chunk_read", CLS_METHOD_RD, cls_rc_chunk_refcount_read,
&h_chunk_refcount_read);
cls_register_cxx_method(h_class, "cas_write_or_get", CLS_METHOD_RD | CLS_METHOD_WR, cls_rc_write_or_get,
&h_cas_write_or_get);
cls_register_cxx_method(h_class, "has_chunk", CLS_METHOD_RD, cls_rc_has_chunk,
&h_chunk_has_chunk);
return;
}
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