/*
  Copyright (c) 2015, Red Hat, Inc. <http://www.redhat.com>
  This file is part of GlusterFS.

  This file is licensed to you under your choice of the GNU Lesser
  General Public License, version 3 or any later version (LGPLv3 or
  later), or the GNU General Public License, version 2 (GPLv2), in all
  cases as published by the Free Software Foundation.
*/

#ifndef _UPCALL_UTILS_H
#define _UPCALL_UTILS_H

#include "glusterfs/iatt.h"
#include "glusterfs/compat-uuid.h"
#include "glusterfs/compat.h"

/* Flags sent for cache_invalidation */
#define UP_NLINK 0x00000001 /* update nlink */
#define UP_MODE 0x00000002  /* update mode and ctime */
#define UP_OWN 0x00000004   /* update mode,uid,gid and ctime */
#define UP_SIZE 0x00000008  /* update fsize */
#define UP_TIMES 0x00000010 /* update all times */
#define UP_ATIME 0x00000020 /* update atime only */
#define UP_PERM                                                                \
    0x00000040 /* update fields needed for permission                          \
                  checking */
#define UP_RENAME                                                              \
    0x00000080 /* this is a rename op - delete the cache                       \
                  entry */
#define UP_FORGET                                                              \
    0x00000100                     /* inode_forget on server side -            \
                                      invalidate the cache entry */
#define UP_PARENT_TIMES 0x00000200 /* update parent dir times */

#define UP_XATTR 0x00000400    /* update the xattrs and ctime */
#define UP_XATTR_RM 0x00000800 /* Remove the xattrs and update ctime */

#define UP_EXPLICIT_LOOKUP 0x00001000 /* Request an explicit lookup */

#define UP_INVAL_ATTR 0x00002000 /* Request to invalidate iatt and xatt */

/* for fops - open, read, lk, */
#define UP_UPDATE_CLIENT (UP_ATIME)

/* for fop - write, truncate */
#define UP_WRITE_FLAGS (UP_SIZE | UP_TIMES)

/* for fop - setattr */
#define UP_ATTR_FLAGS (UP_SIZE | UP_TIMES | UP_OWN | UP_MODE | UP_PERM)
/* for fop - rename */
#define UP_RENAME_FLAGS (UP_RENAME)

/* to invalidate parent directory entries for fops -rename, unlink, rmdir,
 * mkdir, create */
#define UP_PARENT_DENTRY_FLAGS (UP_PARENT_TIMES)

/* for fop - unlink, link, rmdir, mkdir */
#define UP_NLINK_FLAGS (UP_NLINK | UP_TIMES)

#define IATT_UPDATE_FLAGS                                                      \
    (UP_NLINK | UP_MODE | UP_OWN | UP_SIZE | UP_TIMES | UP_ATIME | UP_PERM)

typedef enum {
    GF_UPCALL_EVENT_NULL,
    GF_UPCALL_CACHE_INVALIDATION,
    GF_UPCALL_RECALL_LEASE,
    GF_UPCALL_INODELK_CONTENTION,
    GF_UPCALL_ENTRYLK_CONTENTION,
} gf_upcall_event_t;

struct gf_upcall {
    char *client_uid;
    uuid_t gfid;
    uint32_t event_type;
    void *data;
};

struct gf_upcall_cache_invalidation {
    uint32_t flags;
    uint32_t expire_time_attr;
    struct iatt stat;
    struct iatt p_stat;    /* parent dir stat */
    struct iatt oldp_stat; /* oldparent dir stat */
    dict_t *dict;          /* For xattrs */
};

struct gf_upcall_recall_lease {
    uint32_t lease_type; /* Lease type to which client can downgrade to*/
    uuid_t tid;          /* transaction id of the fop that caused
                            the recall */
    dict_t *dict;
};

struct gf_upcall_inodelk_contention {
    struct gf_flock flock;
    pid_t pid;
    const char *domain;
    dict_t *xdata;
};

struct gf_upcall_entrylk_contention {
    uint32_t type;
    pid_t pid;
    const char *name;
    const char *domain;
    dict_t *xdata;
};

#endif /* _UPCALL_UTILS_H */