/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
 * vim:expandtab:shiftwidth=8:tabstop=8:
 */

#ifndef _MDS_INTERNAL_H
#define _MDS_INTERNAL_H

#include <linux/lustre_mds.h>

#define MDS_SERVICE_WATCHDOG_TIMEOUT 30000

#define MAX_ATIME_DIFF 60

struct mds_filter_data {
        __u64 io_epoch;
};

#define MDS_FILTERDATA(inode) ((struct mds_filter_data *)(inode)->i_filterdata)
#define DENTRY_VALID(dentry)    \
        ((dentry)->d_inode || ((dentry)->d_flags & DCACHE_CROSS_REF))

#define MDS_NO_SPLIT_EXPECTED   0
#define MDS_EXPECT_SPLIT        1
#define MDS_NO_SPLITTABLE       2

static inline struct mds_obd *mds_req2mds(struct ptlrpc_request *req)
{
        return &req->rq_export->exp_obd->u.mds;
}
static inline struct obd_device *req2obd(struct ptlrpc_request *req)
{
        return req->rq_export->exp_obd;
}

#ifdef __KERNEL__
/* Open counts for files.  No longer atomic, must hold inode->i_sem */
#if (LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,0))
# define mds_inode_oatomic(inode)    ((inode)->i_cindex)
#else
# define mds_inode_oatomic(inode)    ((inode)->i_attr_flags)
#endif

static inline int mds_orphan_open_count(struct inode *inode)
{
        LASSERT_MDS_ORPHAN_READ_LOCKED(inode);
        return mds_inode_oatomic(inode);
}

static inline int mds_orphan_open_inc(struct inode *inode)
{
        LASSERT_MDS_ORPHAN_WRITE_LOCKED(inode);
        return ++mds_inode_oatomic(inode);
}

static inline int mds_orphan_open_dec_test(struct inode *inode)
{
        LASSERT_MDS_ORPHAN_WRITE_LOCKED(inode);
        return --mds_inode_oatomic(inode) == 0;
}

#define mds_inode_is_orphan(inode)  ((inode)->i_flags & 0x4000000)
#define mds_inode_set_orphan(inode)                                     \
do {                                                                    \
        (inode)->i_flags |= 0x4000000;                                  \
        CDEBUG(D_VFSTRACE, "setting orphan flag on inode %p\n", inode); \
} while (0)
#define mds_inode_unset_orphan(inode)                                      \
do {                                                                       \
        (inode)->i_flags &= ~(0x4000000);                                  \
        CDEBUG(D_VFSTRACE, "removing orphan flag from inode %p\n", inode); \
} while (0)
#endif /* __KERNEL__ */

/* mds/mds_reint.c */
int enqueue_ordered_locks(struct obd_device *obd, struct ldlm_res_id *p1_res_id,
                          struct lustre_handle *p1_lockh, int p1_lock_mode,
                          ldlm_policy_data_t *p1_policy,
                          struct ldlm_res_id *p2_res_id,
                          struct lustre_handle *p2_lockh, int p2_lock_mode,
                          ldlm_policy_data_t *p2_policy);

int mds_finish_transno(struct mds_obd *mds, struct inode *inode, void *handle,
                       struct ptlrpc_request *req, int rc, __u32 op_data);
void mds_reconstruct_generic(struct ptlrpc_request *req);
void mds_req_from_mcd(struct ptlrpc_request *req, struct mds_client_data *mcd);
int mds_get_parent_child_locked(struct obd_device *obd, struct mds_obd *mds,
                                struct lustre_id *id,
                                struct lustre_handle *parent_lockh,
                                struct dentry **dparentp, int parent_mode,
                                __u64 parent_lockpart, int *update_mode,
                                char *name, int namelen,
                                struct lustre_handle *child_lockh,
                                struct dentry **dchildp, int child_mode,
                                __u64 child_lockpart);
int mds_lock_new_child(struct obd_device *obd, struct inode *inode,
                       struct lustre_handle *child_lockh);

/* mds/mds_lib.c */
void groups_from_buffer(struct group_info *ginfo, __u32 *gids);
int mds_update_unpack(struct ptlrpc_request *, int offset,
                      struct mds_update_record *);
int mds_idmap_add(struct mds_idmap_table *tbl,
                  uid_t rmt_uid, uid_t lcl_uid,
                  gid_t rmt_gid, gid_t lcl_gid);
int mds_idmap_del(struct mds_idmap_table *tbl,
                  uid_t rmt_uid, uid_t lcl_uid,
                  gid_t rmt_gid, gid_t lcl_gid);
int mds_idmap_lookup_uid(struct mds_idmap_table *tbl, int reverse, uid_t uid);
int mds_idmap_lookup_gid(struct mds_idmap_table *tbl, int reverse, gid_t gid);
struct mds_idmap_table *mds_idmap_alloc(void);
void mds_idmap_free(struct mds_idmap_table *tbl);
void mds_body_do_reverse_map(struct mds_export_data *med,
                             struct mds_body *body);
int mds_init_ucred(struct lvfs_ucred *ucred, struct ptlrpc_request *req,
                   struct mds_req_sec_desc *rsd);
void mds_exit_ucred(struct lvfs_ucred *ucred);

/* mds/mds_unlink_open.c */
int mds_cleanup_orphans(struct obd_device *obd);

int mds_unlink_object(struct mds_obd *mds, struct inode *inode,
                      struct lov_mds_md *lmm, int lmm_size,
                      struct llog_cookie *logcookies,
                      int log_unlink, int async);
        

/* mds/mds_log.c */
int mds_log_op_unlink(struct obd_device *obd, struct inode *inode,
                      struct lov_mds_md *lmm, int lmm_size,
                      struct llog_cookie *logcookies, int cookies_size,
                      struct llog_create_locks **res);
int mds_llog_init(struct obd_device *obd, struct obd_llogs *,
                  struct obd_device *tgt, int count, struct llog_catid *logid);
int mds_llog_finish(struct obd_device *obd, struct obd_llogs *, int count);

/* mds/mds_lov.c */
int mds_dt_connect(struct obd_device *obd, char * lov_name);
int mds_dt_disconnect(struct obd_device *obd, int flags);
int mds_dt_set_info(struct obd_export *exp, obd_count keylen,
                     void *key, obd_count vallen, void *val);
int mds_get_lovtgts(struct obd_device *, int tgt_count, struct obd_uuid *);
int mds_dt_write_objids(struct obd_device *obd);
void mds_dt_update_objids(struct obd_device *obd, obd_id *ids);
int mds_dt_set_growth(struct mds_obd *mds, int count);
int mds_dt_set_nextid(struct obd_device *obd);
int mds_dt_clearorphans(struct mds_obd *mds, struct obd_uuid *ost_uuid);
int mds_post_mds_lovconf(struct obd_device *obd);
int mds_notify(struct obd_device *obd, struct obd_device *watched,
               int active, void *data);
int mds_dt_update_config(struct obd_device *obd, int transno);
int mds_convert_lov_ea(struct obd_device *obd, struct inode *inode,
                       struct lov_mds_md *lmm, int lmm_size);
int mds_revalidate_lov_ea(struct obd_device *obd, struct inode *inode,
                          struct lustre_msg *msg, int offset);

/* mds/mds_open.c */
int mds_destroy_objects(struct obd_device *obd,
                        struct inode *inode, int async);
int mds_query_write_access(struct inode *inode);
int mds_open(struct mds_update_record *rec, int offset,
             struct ptlrpc_request *req, struct lustre_handle *);
int mds_pin(struct ptlrpc_request *req, int offset);
int mds_mfd_close(struct ptlrpc_request *req, int offset,
                  struct obd_device *obd, struct mds_file_data *mfd,
                  int unlink_orphan);
int mds_close(struct ptlrpc_request *req, int offset);
int mds_done_writing(struct ptlrpc_request *req, int offset);


/* mds/mds_fs.c */
int mds_client_add(struct obd_device *obd, struct mds_obd *mds,
                   struct mds_export_data *med, int cl_off);
int mds_client_free(struct obd_export *exp, int clear_client);
int mds_obd_create(struct obd_export *exp, struct obdo *oa,
                   void *acl, int acl_size,
                   struct lov_stripe_md **ea, struct obd_trans_info *oti);
int mds_obd_destroy(struct obd_export *exp, struct obdo *oa,
                    struct lov_stripe_md *ea, struct obd_trans_info *oti);

/* mds/handler.c */
int mds_squash_root(struct mds_obd *mds, struct mds_req_sec_desc *rsd,
                    ptl_nid_t *peernid);
int mds_handle(struct ptlrpc_request *req);
extern struct lvfs_callback_ops mds_lvfs_ops;
int mds_dt_clean(struct obd_device *obd);
int mds_postrecov(struct obd_device *obd);
int mds_postrecov_common(struct obd_device *obd);
extern struct lvfs_callback_ops mds_lvfs_ops;

extern int mds_iocontrol(unsigned int cmd,
                         struct obd_export *exp,
                         int len, void *karg,
                         void *uarg);

extern int mds_lock_mode_for_dir(struct obd_device *,
                                 struct dentry *, int);

int mds_fs_setup_rootid(struct obd_device *obd);
int mds_fs_setup_virtid(struct obd_device *obd);

__u64 mds_alloc_fid(struct obd_device *obd);

int mds_alloc_inode_sid(struct obd_device *, struct inode *,
                        void *, struct lustre_id *);

int mds_update_inode_sid(struct obd_device *, struct inode *,
                         void *, struct lustre_id *);

int mds_read_inode_sid(struct obd_device *, struct inode *,
                       struct lustre_id *);

int mds_update_inode_mid(struct obd_device *, struct inode *,
                         void *, struct lustre_id *);

int mds_read_inode_mid(struct obd_device *, struct inode *,
                       struct lustre_id *);

void mds_commit_last_fid_cb(struct obd_device *, __u64 fid,
                            void *data, int error);

void mds_commit_last_transno_cb(struct obd_device *, __u64 transno,
                                void *data, int error);

void mds_set_last_fid(struct obd_device *obd, __u64 fid);

#ifdef __KERNEL__
int mds_get_md(struct obd_device *, struct inode *, void *md,
               int *size, int lock, int mea);

int mds_pack_md(struct obd_device *, struct lustre_msg *, int offset,
                struct mds_body *, struct inode *, int lock, int mea);
int mds_pack_link(struct dentry *dentry, struct ptlrpc_request *req,
                  struct mds_body *repbody, int reply_off);
int mds_pack_ea(struct dentry *dentry, struct ptlrpc_request *req,
                struct mds_body *repbody, int req_off, int reply_off);
int mds_pack_ealist(struct dentry *dentry, struct ptlrpc_request *req,
                    struct mds_body *repbody, int reply_off);
int mds_pack_acl(struct obd_device *, struct lustre_msg *, int offset,
                 struct mds_body *, struct inode *);
int mds_pack_inode2id(struct obd_device *, struct lustre_id *,
                      struct inode *, int);

void mds_pack_inode2body(struct obd_device *, struct mds_body *,
                         struct inode *, int);

void mds_pack_dentry2id(struct obd_device *, struct lustre_id *,
                        struct dentry *, int);

void mds_pack_dentry2body(struct obd_device *, struct mds_body *b,
                          struct dentry *, int);
#endif

/* mds/mds_lmv.c */
int mds_md_postsetup(struct obd_device *obd);
int mds_md_connect(struct obd_device *obd, char * lov_name);
int mds_md_disconnect(struct obd_device *obd, int flags);
int mds_try_to_split_dir(struct obd_device *, struct dentry *, struct mea **,
                         int, int);
int mds_md_get_attr(struct obd_device *, struct inode *, struct mea **, int *);
int mds_choose_mdsnum(struct obd_device *, const char *, int, int, struct ptlrpc_peer *, struct inode *);
int mds_md_postsetup(struct obd_device *);
int mds_splitting_expected(struct obd_device *, struct dentry *);
int mds_lock_slave_objs(struct obd_device *, struct dentry *,
                        struct lustre_handle **);
int mds_unlink_slave_objs(struct obd_device *, struct dentry *);
void mds_unlock_slave_objs(struct obd_device *, struct dentry *,
                           struct lustre_handle *);
int mds_lock_and_check_slave(int, struct ptlrpc_request *, struct lustre_handle *);
int mds_convert_mea_ea(struct obd_device *, struct inode *, struct lov_mds_md *, int);
int mds_is_dir_empty(struct obd_device *, struct dentry *);
int mds_md_reconnect(struct obd_device *obd);

/* mds_lsd.c */
struct upcall_cache *__mds_get_global_lsd_cache(void);
int mds_init_lsd_cache(void);
void mds_cleanup_lsd_cache(void);
struct lustre_sec_desc * mds_get_lsd(__u32 uid);
void mds_put_lsd(struct lustre_sec_desc *lsd);
void mds_flush_lsd(__u32 id);

#endif /* _MDS_INTERNAL_H */