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// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
// vim: ts=8 sw=2 smarttab
/*
* Ceph - scalable distributed file system
*
* Copyright (C) 2015 Red Hat
*
* This is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License version 2.1, as published by the Free Software
* Foundation. See file COPYING.
*
*/
#include "include/rados/librados.hpp"
#include "mds/CInode.h"
#include "cls_cephfs_client.h"
using ceph::bufferlist;
using ceph::decode;
#define XATTR_CEILING "scan_ceiling"
#define XATTR_MAX_MTIME "scan_max_mtime"
#define XATTR_MAX_SIZE "scan_max_size"
int ClsCephFSClient::accumulate_inode_metadata(
librados::IoCtx &ctx,
inodeno_t inode_no,
const uint64_t obj_index,
const uint64_t obj_size,
const time_t mtime)
{
AccumulateArgs args(
obj_index,
obj_size,
mtime,
XATTR_CEILING,
XATTR_MAX_MTIME,
XATTR_MAX_SIZE);
// Generate 0th object name, where we will accumulate sizes/mtimes
object_t zeroth_object = InodeStore::get_object_name(inode_no, frag_t(), "");
// Construct a librados operation invoking our class method
librados::ObjectReadOperation op;
bufferlist inbl;
args.encode(inbl);
op.exec("cephfs", "accumulate_inode_metadata", inbl);
// Execute op
bufferlist outbl;
return ctx.operate(zeroth_object.name, &op, &outbl);
}
int ClsCephFSClient::delete_inode_accumulate_result(
librados::IoCtx &ctx,
const std::string &oid)
{
librados::ObjectWriteOperation op;
// Remove xattrs from object
//
op.rmxattr(XATTR_CEILING);
op.rmxattr(XATTR_MAX_SIZE);
op.rmxattr(XATTR_MAX_MTIME);
return (ctx.operate(oid, &op));
}
int ClsCephFSClient::fetch_inode_accumulate_result(
librados::IoCtx &ctx,
const std::string &oid,
inode_backtrace_t *backtrace,
file_layout_t *layout,
AccumulateResult *result)
{
ceph_assert(backtrace != NULL);
ceph_assert(result != NULL);
librados::ObjectReadOperation op;
int scan_ceiling_r = 0;
bufferlist scan_ceiling_bl;
op.getxattr(XATTR_CEILING, &scan_ceiling_bl, &scan_ceiling_r);
int scan_max_size_r = 0;
bufferlist scan_max_size_bl;
op.getxattr(XATTR_MAX_SIZE, &scan_max_size_bl, &scan_max_size_r);
int scan_max_mtime_r = 0;
bufferlist scan_max_mtime_bl;
op.getxattr(XATTR_MAX_MTIME, &scan_max_mtime_bl, &scan_max_mtime_r);
int parent_r = 0;
bufferlist parent_bl;
op.getxattr("parent", &parent_bl, &parent_r);
op.set_op_flags2(librados::OP_FAILOK);
int layout_r = 0;
bufferlist layout_bl;
op.getxattr("layout", &layout_bl, &layout_r);
op.set_op_flags2(librados::OP_FAILOK);
bufferlist op_bl;
int r = ctx.operate(oid, &op, &op_bl);
if (r < 0) {
return r;
}
// Load scan_ceiling
try {
auto scan_ceiling_bl_iter = scan_ceiling_bl.cbegin();
ObjCeiling ceiling;
ceiling.decode(scan_ceiling_bl_iter);
result->ceiling_obj_index = ceiling.id;
result->ceiling_obj_size = ceiling.size;
} catch (const ceph::buffer::error &err) {
//dout(4) << "Invalid size attr on '" << oid << "'" << dendl;
return -EINVAL;
}
// Load scan_max_size
try {
auto scan_max_size_bl_iter = scan_max_size_bl.cbegin();
decode(result->max_obj_size, scan_max_size_bl_iter);
} catch (const ceph::buffer::error &err) {
//dout(4) << "Invalid size attr on '" << oid << "'" << dendl;
return -EINVAL;
}
// Load scan_max_mtime
try {
auto scan_max_mtime_bl_iter = scan_max_mtime_bl.cbegin();
decode(result->max_mtime, scan_max_mtime_bl_iter);
} catch (const ceph::buffer::error &err) {
//dout(4) << "Invalid size attr on '" << oid << "'" << dendl;
return -EINVAL;
}
// Deserialize backtrace
if (parent_bl.length()) {
try {
auto q = parent_bl.cbegin();
backtrace->decode(q);
} catch (ceph::buffer::error &e) {
//dout(4) << "Corrupt backtrace on '" << oid << "': " << e << dendl;
return -EINVAL;
}
}
// Deserialize layout
if (layout_bl.length()) {
try {
auto q = layout_bl.cbegin();
decode(*layout, q);
} catch (ceph::buffer::error &e) {
return -EINVAL;
}
}
return 0;
}
void ClsCephFSClient::build_tag_filter(
const std::string &scrub_tag,
bufferlist *out_bl)
{
ceph_assert(out_bl != NULL);
// Leading part of bl is un-versioned string naming the filter
encode(std::string("cephfs.inode_tag"), *out_bl);
// Filter-specific part of the bl: in our case this is a versioned structure
InodeTagFilterArgs args;
args.scrub_tag = scrub_tag;
args.encode(*out_bl);
}
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