Adding upstream version 18.2.2.upstream/18.2.2

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 366 insertions, 0 deletions

diff --git a/src/client/Inode.h b/src/client/Inode.h
new file mode 100644
index 000000000..d28ff2e08
--- /dev/null
+++ b/src/client/Inode.h
@@ -0,0 +1,366 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#ifndef CEPH_CLIENT_INODE_H
+#define CEPH_CLIENT_INODE_H
+
+#include <numeric>
+
+#include "include/compat.h"
+#include "include/ceph_assert.h"
+#include "include/types.h"
+#include "include/xlist.h"
+
+#include "mds/flock.h"
+#include "mds/mdstypes.h" // hrm
+#include "include/cephfs/types.h"
+
+#include "osdc/ObjectCacher.h"
+
+#include "InodeRef.h"
+#include "MetaSession.h"
+#include "UserPerm.h"
+#include "Delegation.h"
+
+class Client;
+class Dentry;
+class Dir;
+struct SnapRealm;
+struct Inode;
+class MetaRequest;
+class filepath;
+class Fh;
+
+class Cap {
+public:
+  Cap() = delete;
+  Cap(Inode &i, MetaSession *s) : inode(i),
+                                  session(s),
+                                  gen(s->cap_gen),
+                                  cap_item(this)
+  {
+    s->caps.push_back(&cap_item);
+  }
+  ~Cap() {
+    cap_item.remove_myself();
+  }
+
+  void touch(void) {
+    // move to back of LRU
+    session->caps.push_back(&cap_item);
+  }
+
+  void dump(Formatter *f) const;
+
+  Inode &inode;
+  MetaSession *session;
+  uint64_t cap_id = 0;
+  unsigned issued = 0;
+  unsigned implemented = 0;
+  unsigned wanted = 0;   // as known to mds.
+  uint64_t seq = 0;
+  uint64_t issue_seq = 0;
+  __u32 mseq = 0;  // migration seq
+  __u32 gen;
+  UserPerm latest_perms;
+
+private:
+  /* Note that this Cap will not move (see Inode::caps):
+   *
+   * Section 23.1.2#8
+   * The insert members shall not affect the validity of iterators and
+   * references to the container, and the erase members shall invalidate only
+   * iterators and references to the erased elements.
+   */
+  xlist<Cap *>::item cap_item;
+};
+
+struct CapSnap {
+  //snapid_t follows;  // map key
+  InodeRef in;
+  SnapContext context;
+  int issued = 0, dirty = 0;
+
+  uint64_t size = 0;
+  utime_t ctime, btime, mtime, atime;
+  version_t time_warp_seq = 0;
+  uint64_t change_attr = 0;
+  uint32_t   mode = 0;
+  uid_t      uid = 0;
+  gid_t      gid = 0;
+  std::map<std::string,bufferptr> xattrs;
+  version_t xattr_version = 0;
+
+  bufferlist inline_data;
+  version_t inline_version = 0;
+
+  bool writing = false, dirty_data = false;
+  uint64_t flush_tid = 0;
+
+  int64_t cap_dirtier_uid = -1;
+  int64_t cap_dirtier_gid = -1;
+
+  explicit CapSnap(Inode *i)
+    : in(i)
+  {}
+
+  void dump(Formatter *f) const;
+};
+
+// inode flags
+#define I_COMPLETE		(1 << 0)
+#define I_DIR_ORDERED		(1 << 1)
+#define I_SNAPDIR_OPEN		(1 << 2)
+#define I_KICK_FLUSH		(1 << 3)
+#define I_CAP_DROPPED		(1 << 4)
+#define I_ERROR_FILELOCK	(1 << 5)
+
+struct Inode : RefCountedObject {
+  ceph::coarse_mono_time hold_caps_until;
+  Client *client;
+
+  // -- the actual inode --
+  inodeno_t ino; // ORDER DEPENDENCY: oset
+  snapid_t  snapid;
+  ino_t faked_ino = 0;
+
+  uint32_t   rdev = 0;    // if special file
+
+  // affected by any inode change...
+  utime_t    ctime;   // inode change time
+  utime_t    btime;   // birth time
+
+  // perm (namespace permissions)
+  uint32_t   mode = 0;
+  uid_t      uid = 0;
+  gid_t      gid = 0;
+
+  // nlink
+  int32_t    nlink = 0;
+
+  // file (data access)
+  ceph_dir_layout dir_layout{};
+  file_layout_t layout;
+  uint64_t   size = 0;        // on directory, # dentries
+  uint32_t   truncate_seq = 1;
+  uint64_t   truncate_size = -1;
+  utime_t    mtime;   // file data modify time.
+  utime_t    atime;   // file data access time.
+  uint32_t   time_warp_seq = 0;  // count of (potential) mtime/atime timewarps (i.e., utimes())
+  uint64_t   change_attr = 0;
+
+  uint64_t max_size = 0;  // max size we can write to
+
+  // dirfrag, recursive accountin
+  frag_info_t dirstat;
+  nest_info_t rstat;
+
+  // special stuff
+  version_t version = 0;           // auth only
+  version_t xattr_version = 0;
+  utime_t   snap_btime;        // snapshot creation (birth) time
+  std::map<std::string, std::string> snap_metadata;
+
+  // inline data
+  version_t  inline_version = 0;
+  bufferlist inline_data;
+
+  std::vector<uint8_t> fscrypt_auth;
+  std::vector<uint8_t> fscrypt_file;
+  bool is_fscrypt_enabled() {
+    return !!fscrypt_auth.size();
+  }
+
+  bool is_root()    const { return ino == CEPH_INO_ROOT; }
+  bool is_symlink() const { return (mode & S_IFMT) == S_IFLNK; }
+  bool is_dir()     const { return (mode & S_IFMT) == S_IFDIR; }
+  bool is_file()    const { return (mode & S_IFMT) == S_IFREG; }
+
+  bool has_dir_layout() const {
+    return layout != file_layout_t();
+  }
+
+  __u32 hash_dentry_name(const std::string &dn) {
+    int which = dir_layout.dl_dir_hash;
+    if (!which)
+      which = CEPH_STR_HASH_LINUX;
+    ceph_assert(ceph_str_hash_valid(which));
+    return ceph_str_hash(which, dn.data(), dn.length());
+  }
+
+  unsigned flags = 0;
+
+  quota_info_t quota;
+
+  bool is_complete_and_ordered() {
+    static const unsigned wants = I_COMPLETE | I_DIR_ORDERED;
+    return (flags & wants) == wants;
+  }
+
+  // about the dir (if this is one!)
+  Dir       *dir = 0;     // if i'm a dir.
+  fragtree_t dirfragtree;
+  uint64_t dir_release_count = 1;
+  uint64_t dir_ordered_count = 1;
+  bool dir_hashed = false;
+  bool dir_replicated = false;
+
+  // per-mds caps
+  std::map<mds_rank_t, Cap> caps;            // mds -> Cap
+  Cap *auth_cap = 0;
+  int64_t cap_dirtier_uid = -1;
+  int64_t cap_dirtier_gid = -1;
+  unsigned dirty_caps = 0;
+  unsigned flushing_caps = 0;
+  std::map<ceph_tid_t, int> flushing_cap_tids;
+  int shared_gen = 0;
+  int cache_gen = 0;
+  int snap_caps = 0;
+  int snap_cap_refs = 0;
+  xlist<Inode*>::item delay_cap_item, dirty_cap_item, flushing_cap_item;
+
+  SnapRealm *snaprealm = 0;
+  xlist<Inode*>::item snaprealm_item;
+  InodeRef snapdir_parent;  // only if we are a snapdir inode
+  std::map<snapid_t,CapSnap> cap_snaps;   // pending flush to mds
+
+  //int open_by_mode[CEPH_FILE_MODE_NUM];
+  std::map<int,int> open_by_mode;
+  std::map<int,int> cap_refs;
+
+  ObjectCacher::ObjectSet oset; // ORDER DEPENDENCY: ino
+
+  uint64_t reported_size = 0;
+  uint64_t wanted_max_size = 0;
+  uint64_t requested_max_size = 0;
+
+  uint64_t  ll_ref = 0;   // separate ref count for ll client
+  xlist<Dentry *> dentries; // if i'm linked to a dentry.
+  std::string    symlink;  // symlink content, if it's a symlink
+  std::map<std::string,bufferptr> xattrs;
+  std::map<frag_t,int> fragmap;  // known frag -> mds mappings
+  std::map<frag_t, std::vector<mds_rank_t>> frag_repmap; // non-auth mds mappings
+
+  std::list<ceph::condition_variable*> waitfor_caps;
+  std::list<ceph::condition_variable*> waitfor_commit;
+  std::list<ceph::condition_variable*> waitfor_deleg;
+
+  Dentry *get_first_parent() {
+    ceph_assert(!dentries.empty());
+    return *dentries.begin();
+  }
+
+  void make_long_path(filepath& p);
+  void make_short_path(filepath& p);
+  void make_nosnap_relative_path(filepath& p);
+
+  // The ref count. 1 for each dentry, fh, inode_map,
+  // cwd that links to me.
+  void iget() { get(); }
+  void iput(int n=1) { ceph_assert(n >= 0); while (n--) put(); }
+
+  void ll_get() {
+    ll_ref++;
+  }
+  void ll_put(uint64_t n=1) {
+    ceph_assert(ll_ref >= n);
+    ll_ref -= n;
+  }
+
+  // file locks
+  std::unique_ptr<ceph_lock_state_t> fcntl_locks;
+  std::unique_ptr<ceph_lock_state_t> flock_locks;
+
+  bool has_any_filelocks() {
+    return
+      (fcntl_locks && !fcntl_locks->empty()) ||
+      (flock_locks && !flock_locks->empty());
+  }
+
+  std::list<Delegation> delegations;
+
+  xlist<MetaRequest*> unsafe_ops;
+
+  std::set<Fh*> fhs;
+
+  mds_rank_t dir_pin = MDS_RANK_NONE;
+
+  Inode() = delete;
+  Inode(Client *c, vinodeno_t vino, file_layout_t *newlayout)
+    : client(c), ino(vino.ino), snapid(vino.snapid), delay_cap_item(this),
+      dirty_cap_item(this), flushing_cap_item(this), snaprealm_item(this),
+      oset((void *)this, newlayout->pool_id, this->ino) {}
+  ~Inode();
+
+  vinodeno_t vino() const { return vinodeno_t(ino, snapid); }
+
+  struct Compare {
+    bool operator() (Inode* const & left, Inode* const & right) {
+      if (left->ino.val < right->ino.val) {
+	return (left->snapid.val < right->snapid.val);
+      }
+      return false;
+    }
+  };
+
+  bool check_mode(const UserPerm& perms, unsigned want);
+
+  // CAPS --------
+  void get_open_ref(int mode);
+  bool put_open_ref(int mode);
+
+  void get_cap_ref(int cap);
+  int put_cap_ref(int cap);
+  bool is_any_caps();
+  bool cap_is_valid(const Cap &cap) const;
+  int caps_issued(int *implemented = 0) const;
+  void try_touch_cap(mds_rank_t mds);
+  bool caps_issued_mask(unsigned mask, bool allow_impl=false);
+  int caps_used();
+  int caps_file_wanted();
+  int caps_wanted();
+  int caps_mds_wanted();
+  int caps_dirty();
+  const UserPerm *get_best_perms();
+
+  bool have_valid_size();
+  Dir *open_dir();
+
+  void add_fh(Fh *f) {fhs.insert(f);}
+  void rm_fh(Fh *f) {fhs.erase(f);}
+  void set_async_err(int r);
+  void dump(Formatter *f) const;
+
+  void break_all_delegs() { break_deleg(false); };
+
+  void recall_deleg(bool skip_read);
+  bool has_recalled_deleg();
+  int set_deleg(Fh *fh, unsigned type, ceph_deleg_cb_t cb, void *priv);
+  void unset_deleg(Fh *fh);
+
+  void mark_caps_dirty(int caps);
+  void mark_caps_clean();
+private:
+  // how many opens for write on this Inode?
+  long open_count_for_write()
+  {
+    return (long)(open_by_mode[CEPH_FILE_MODE_RDWR] +
+		  open_by_mode[CEPH_FILE_MODE_WR]);
+  };
+
+  // how many opens of any sort on this inode?
+  long open_count()
+  {
+    return (long) std::accumulate(open_by_mode.begin(), open_by_mode.end(), 0,
+				  [] (int value, const std::map<int, int>::value_type& p)
+                   { return value + p.second; });
+  };
+
+  void break_deleg(bool skip_read);
+  bool delegations_broken(bool skip_read);
+
+};
+
+std::ostream& operator<<(std::ostream &out, const Inode &in);
+
+#endif