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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) 2004-2006 Sage Weil <sage@newdream.net>
+ *
+ * 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.
+ *
+ */
+
+
+#ifndef CEPH_FILER_H
+#define CEPH_FILER_H
+
+/*** Filer
+ *
+ * stripe file ranges onto objects.
+ * build list<ObjectExtent> for the objecter or objectcacher.
+ *
+ * also, provide convenience methods that call objecter for you.
+ *
+ * "files" are identified by ino.
+ */
+
+
+#include <mutex>
+
+#include "include/types.h"
+
+#include "common/ceph_time.h"
+
+#include "osd/OSDMap.h"
+#include "Objecter.h"
+#include "Striper.h"
+
+class Context;
+class Messenger;
+class OSDMap;
+class Finisher;
+
+
+/**** Filer interface ***/
+
+class Filer {
+ CephContext *cct;
+ Objecter *objecter;
+ Finisher *finisher;
+
+ // probes
+ struct Probe {
+ std::mutex lock;
+ typedef std::lock_guard<std::mutex> lock_guard;
+ typedef std::unique_lock<std::mutex> unique_lock;
+ inodeno_t ino;
+ file_layout_t layout;
+ snapid_t snapid;
+
+ uint64_t *psize;
+ ceph::real_time *pmtime;
+ utime_t *pumtime;
+
+ int flags;
+
+ bool fwd;
+
+ Context *onfinish;
+
+ std::vector<ObjectExtent> probing;
+ uint64_t probing_off, probing_len;
+
+ std::map<object_t, uint64_t> known_size;
+ ceph::real_time max_mtime;
+
+ std::set<object_t> ops;
+
+ int err;
+ bool found_size;
+
+ Probe(inodeno_t i, const file_layout_t &l, snapid_t sn,
+ uint64_t f, uint64_t *e, ceph::real_time *m, int fl, bool fw,
+ Context *c) :
+ ino(i), layout(l), snapid(sn),
+ psize(e), pmtime(m), pumtime(nullptr), flags(fl), fwd(fw), onfinish(c),
+ probing_off(f), probing_len(0),
+ err(0), found_size(false) {}
+
+ Probe(inodeno_t i, const file_layout_t &l, snapid_t sn,
+ uint64_t f, uint64_t *e, utime_t *m, int fl, bool fw,
+ Context *c) :
+ ino(i), layout(l), snapid(sn),
+ psize(e), pmtime(nullptr), pumtime(m), flags(fl), fwd(fw),
+ onfinish(c), probing_off(f), probing_len(0),
+ err(0), found_size(false) {}
+ };
+
+ class C_Probe;
+
+ void _probe(Probe *p, Probe::unique_lock& pl);
+ bool _probed(Probe *p, const object_t& oid, uint64_t size,
+ ceph::real_time mtime, Probe::unique_lock& pl);
+
+ public:
+ Filer(const Filer& other);
+ const Filer operator=(const Filer& other);
+
+ Filer(Objecter *o, Finisher *f) : cct(o->cct), objecter(o), finisher(f) {}
+ ~Filer() {}
+
+ bool is_active() {
+ return objecter->is_active(); // || (oc && oc->is_active());
+ }
+
+
+ /*** async file interface. scatter/gather as needed. ***/
+
+ void read(inodeno_t ino,
+ const file_layout_t *layout,
+ snapid_t snap,
+ uint64_t offset,
+ uint64_t len,
+ ceph::buffer::list *bl, // ptr to data
+ int flags,
+ Context *onfinish,
+ int op_flags = 0) {
+ ceph_assert(snap); // (until there is a non-NOSNAP write)
+ std::vector<ObjectExtent> extents;
+ Striper::file_to_extents(cct, ino, layout, offset, len, 0, extents);
+ objecter->sg_read(extents, snap, bl, flags, onfinish, op_flags);
+ }
+
+ void read_trunc(inodeno_t ino,
+ const file_layout_t *layout,
+ snapid_t snap,
+ uint64_t offset,
+ uint64_t len,
+ ceph::buffer::list *bl, // ptr to data
+ int flags,
+ uint64_t truncate_size,
+ __u32 truncate_seq,
+ Context *onfinish,
+ int op_flags = 0) {
+ ceph_assert(snap); // (until there is a non-NOSNAP write)
+ std::vector<ObjectExtent> extents;
+ Striper::file_to_extents(cct, ino, layout, offset, len, truncate_size,
+ extents);
+ objecter->sg_read_trunc(extents, snap, bl, flags,
+ truncate_size, truncate_seq, onfinish, op_flags);
+ }
+
+ void write(inodeno_t ino,
+ const file_layout_t *layout,
+ const SnapContext& snapc,
+ uint64_t offset,
+ uint64_t len,
+ ceph::buffer::list& bl,
+ ceph::real_time mtime,
+ int flags,
+ Context *oncommit,
+ int op_flags = 0) {
+ std::vector<ObjectExtent> extents;
+ Striper::file_to_extents(cct, ino, layout, offset, len, 0, extents);
+ objecter->sg_write(extents, snapc, bl, mtime, flags, oncommit, op_flags);
+ }
+
+ void write_trunc(inodeno_t ino,
+ const file_layout_t *layout,
+ const SnapContext& snapc,
+ uint64_t offset,
+ uint64_t len,
+ ceph::buffer::list& bl,
+ ceph::real_time mtime,
+ int flags,
+ uint64_t truncate_size,
+ __u32 truncate_seq,
+ Context *oncommit,
+ int op_flags = 0) {
+ std::vector<ObjectExtent> extents;
+ Striper::file_to_extents(cct, ino, layout, offset, len, truncate_size,
+ extents);
+ objecter->sg_write_trunc(extents, snapc, bl, mtime, flags,
+ truncate_size, truncate_seq, oncommit, op_flags);
+ }
+
+ void truncate(inodeno_t ino,
+ const file_layout_t *layout,
+ const SnapContext& snapc,
+ uint64_t offset,
+ uint64_t len,
+ __u32 truncate_seq,
+ ceph::real_time mtime,
+ int flags,
+ Context *oncommit);
+ void _do_truncate_range(struct TruncRange *pr, int fin);
+
+ void zero(inodeno_t ino,
+ const file_layout_t *layout,
+ const SnapContext& snapc,
+ uint64_t offset,
+ uint64_t len,
+ ceph::real_time mtime,
+ int flags,
+ bool keep_first,
+ Context *oncommit) {
+ std::vector<ObjectExtent> extents;
+ Striper::file_to_extents(cct, ino, layout, offset, len, 0, extents);
+ if (extents.size() == 1) {
+ if (extents[0].offset == 0 && extents[0].length == layout->object_size
+ && (!keep_first || extents[0].objectno != 0))
+ objecter->remove(extents[0].oid, extents[0].oloc,
+ snapc, mtime, flags, oncommit);
+ else
+ objecter->zero(extents[0].oid, extents[0].oloc, extents[0].offset,
+ extents[0].length, snapc, mtime, flags, oncommit);
+ } else {
+ C_GatherBuilder gcom(cct, oncommit);
+ for (auto p = extents.begin(); p != extents.end(); ++p) {
+ if (p->offset == 0 && p->length == layout->object_size &&
+ (!keep_first || p->objectno != 0))
+ objecter->remove(p->oid, p->oloc,
+ snapc, mtime, flags,
+ oncommit ? gcom.new_sub():0);
+ else
+ objecter->zero(p->oid, p->oloc, p->offset, p->length,
+ snapc, mtime, flags,
+ oncommit ? gcom.new_sub():0);
+ }
+ gcom.activate();
+ }
+ }
+
+ void zero(inodeno_t ino,
+ const file_layout_t *layout,
+ const SnapContext& snapc,
+ uint64_t offset,
+ uint64_t len,
+ ceph::real_time mtime,
+ int flags,
+ Context *oncommit) {
+ zero(ino, layout,
+ snapc, offset,
+ len, mtime,
+ flags, false,
+ oncommit);
+ }
+ // purge range of ino.### objects
+ int purge_range(inodeno_t ino,
+ const file_layout_t *layout,
+ const SnapContext& snapc,
+ uint64_t first_obj, uint64_t num_obj,
+ ceph::real_time mtime,
+ int flags, Context *oncommit);
+ void _do_purge_range(struct PurgeRange *pr, int fin, int err);
+
+ /*
+ * probe
+ * specify direction,
+ * and whether we stop when we find data, or hole.
+ */
+ int probe(inodeno_t ino,
+ const file_layout_t *layout,
+ snapid_t snapid,
+ uint64_t start_from,
+ uint64_t *end,
+ ceph::real_time *mtime,
+ bool fwd,
+ int flags,
+ Context *onfinish);
+
+ int probe(inodeno_t ino,
+ const file_layout_t *layout,
+ snapid_t snapid,
+ uint64_t start_from,
+ uint64_t *end,
+ bool fwd,
+ int flags,
+ Context *onfinish) {
+ return probe(ino, layout, snapid, start_from, end,
+ (ceph::real_time* )0, fwd, flags, onfinish);
+ }
+
+ int probe(inodeno_t ino,
+ const file_layout_t *layout,
+ snapid_t snapid,
+ uint64_t start_from,
+ uint64_t *end,
+ utime_t *mtime,
+ bool fwd,
+ int flags,
+ Context *onfinish);
+
+private:
+ int probe_impl(Probe* probe, const file_layout_t *layout,
+ uint64_t start_from, uint64_t *end);
+};
+
+#endif // !CEPH_FILER_H
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