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FITS: generating send-streams in portable format
This commit adds the command 'zfs fits-send', analogous to zfs send. The
generated send stream is compatible with the stream generated with that
from 'btrfs send' and can in principle easily be received to any filesystem.


 185         boolean_t recursive;
 186         boolean_t gotone;
 187         boolean_t temphold;
 188         char failed[MAXPATHLEN];
 189 };
 190 
 191 #define dsl_dataset_is_snapshot(ds) \
 192         ((ds)->ds_phys->ds_num_children != 0)
 193 
 194 #define DS_UNIQUE_IS_ACCURATE(ds)       \
 195         (((ds)->ds_phys->ds_flags & DS_FLAG_UNIQUE_ACCURATE) != 0)
 196 
 197 int dsl_dataset_hold(const char *name, void *tag, dsl_dataset_t **dsp);
 198 int dsl_dataset_hold_obj(struct dsl_pool *dp, uint64_t dsobj,
 199     void *tag, dsl_dataset_t **);
 200 int dsl_dataset_own(const char *name, boolean_t inconsistentok,
 201     void *tag, dsl_dataset_t **dsp);
 202 int dsl_dataset_own_obj(struct dsl_pool *dp, uint64_t dsobj,
 203     boolean_t inconsistentok, void *tag, dsl_dataset_t **dsp);
 204 void dsl_dataset_name(dsl_dataset_t *ds, char *name);

 205 void dsl_dataset_rele(dsl_dataset_t *ds, void *tag);
 206 void dsl_dataset_disown(dsl_dataset_t *ds, void *tag);
 207 void dsl_dataset_drop_ref(dsl_dataset_t *ds, void *tag);
 208 boolean_t dsl_dataset_tryown(dsl_dataset_t *ds, boolean_t inconsistentok,
 209     void *tag);
 210 void dsl_dataset_make_exclusive(dsl_dataset_t *ds, void *tag);
 211 void dsl_register_onexit_hold_cleanup(dsl_dataset_t *ds, const char *htag,
 212     minor_t minor);
 213 uint64_t dsl_dataset_create_sync(dsl_dir_t *pds, const char *lastname,
 214     dsl_dataset_t *origin, uint64_t flags, cred_t *, dmu_tx_t *);
 215 uint64_t dsl_dataset_create_sync_dd(dsl_dir_t *dd, dsl_dataset_t *origin,
 216     uint64_t flags, dmu_tx_t *tx);
 217 int dsl_dataset_destroy(dsl_dataset_t *ds, void *tag, boolean_t defer);
 218 dsl_checkfunc_t dsl_dataset_destroy_check;
 219 dsl_syncfunc_t dsl_dataset_destroy_sync;
 220 dsl_syncfunc_t dsl_dataset_user_hold_sync;
 221 int dsl_dataset_snapshot_check(dsl_dataset_t *ds, const char *, dmu_tx_t *tx);
 222 void dsl_dataset_snapshot_sync(dsl_dataset_t *ds, const char *, dmu_tx_t *tx);
 223 int dsl_dataset_rename(char *name, const char *newname, boolean_t recursive);
 224 int dsl_dataset_promote(const char *name, char *conflsnap);




 185         boolean_t recursive;
 186         boolean_t gotone;
 187         boolean_t temphold;
 188         char failed[MAXPATHLEN];
 189 };
 190 
 191 #define dsl_dataset_is_snapshot(ds) \
 192         ((ds)->ds_phys->ds_num_children != 0)
 193 
 194 #define DS_UNIQUE_IS_ACCURATE(ds)       \
 195         (((ds)->ds_phys->ds_flags & DS_FLAG_UNIQUE_ACCURATE) != 0)
 196 
 197 int dsl_dataset_hold(const char *name, void *tag, dsl_dataset_t **dsp);
 198 int dsl_dataset_hold_obj(struct dsl_pool *dp, uint64_t dsobj,
 199     void *tag, dsl_dataset_t **);
 200 int dsl_dataset_own(const char *name, boolean_t inconsistentok,
 201     void *tag, dsl_dataset_t **dsp);
 202 int dsl_dataset_own_obj(struct dsl_pool *dp, uint64_t dsobj,
 203     boolean_t inconsistentok, void *tag, dsl_dataset_t **dsp);
 204 void dsl_dataset_name(dsl_dataset_t *ds, char *name);
 205 int dsl_dataset_namelen(dsl_dataset_t *ds);
 206 void dsl_dataset_rele(dsl_dataset_t *ds, void *tag);
 207 void dsl_dataset_disown(dsl_dataset_t *ds, void *tag);
 208 void dsl_dataset_drop_ref(dsl_dataset_t *ds, void *tag);
 209 boolean_t dsl_dataset_tryown(dsl_dataset_t *ds, boolean_t inconsistentok,
 210     void *tag);
 211 void dsl_dataset_make_exclusive(dsl_dataset_t *ds, void *tag);
 212 void dsl_register_onexit_hold_cleanup(dsl_dataset_t *ds, const char *htag,
 213     minor_t minor);
 214 uint64_t dsl_dataset_create_sync(dsl_dir_t *pds, const char *lastname,
 215     dsl_dataset_t *origin, uint64_t flags, cred_t *, dmu_tx_t *);
 216 uint64_t dsl_dataset_create_sync_dd(dsl_dir_t *dd, dsl_dataset_t *origin,
 217     uint64_t flags, dmu_tx_t *tx);
 218 int dsl_dataset_destroy(dsl_dataset_t *ds, void *tag, boolean_t defer);
 219 dsl_checkfunc_t dsl_dataset_destroy_check;
 220 dsl_syncfunc_t dsl_dataset_destroy_sync;
 221 dsl_syncfunc_t dsl_dataset_user_hold_sync;
 222 int dsl_dataset_snapshot_check(dsl_dataset_t *ds, const char *, dmu_tx_t *tx);
 223 void dsl_dataset_snapshot_sync(dsl_dataset_t *ds, const char *, dmu_tx_t *tx);
 224 int dsl_dataset_rename(char *name, const char *newname, boolean_t recursive);
 225 int dsl_dataset_promote(const char *name, char *conflsnap);