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author | mm <mm@FreeBSD.org> | 2013-03-05 08:09:53 +0000 |
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committer | mm <mm@FreeBSD.org> | 2013-03-05 08:09:53 +0000 |
commit | 99f883783c89d10b9d02e77393eb9d0a307f3ca0 (patch) | |
tree | 669ea5740806cbf29b6e064275d3f5a62478bd47 /sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dmu_send.c | |
parent | 712512f2cc075f7890eaf59c6aa392f330857ff9 (diff) | |
parent | d5063724619a16bd1592c39395c787e97be18693 (diff) | |
download | FreeBSD-src-99f883783c89d10b9d02e77393eb9d0a307f3ca0.zip FreeBSD-src-99f883783c89d10b9d02e77393eb9d0a307f3ca0.tar.gz |
WiP merge of libzfs_core (MFV r238590, r238592)
not yet working, ioctl handling needs to be changed
Diffstat (limited to 'sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dmu_send.c')
-rw-r--r-- | sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dmu_send.c | 110 |
1 files changed, 56 insertions, 54 deletions
diff --git a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dmu_send.c b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dmu_send.c index 5d5c494..d7ff267 100644 --- a/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dmu_send.c +++ b/sys/cddl/contrib/opensolaris/uts/common/fs/zfs/dmu_send.c @@ -403,9 +403,48 @@ backup_cb(spa_t *spa, zilog_t *zilog, const blkptr_t *bp, return (err); } +/* + * Return TRUE if 'earlier' is an earlier snapshot in 'later's timeline. + * For example, they could both be snapshots of the same filesystem, and + * 'earlier' is before 'later'. Or 'earlier' could be the origin of + * 'later's filesystem. Or 'earlier' could be an older snapshot in the origin's + * filesystem. Or 'earlier' could be the origin's origin. + */ +static boolean_t +is_before(dsl_dataset_t *later, dsl_dataset_t *earlier) +{ + dsl_pool_t *dp = later->ds_dir->dd_pool; + int error; + boolean_t ret; + dsl_dataset_t *origin; + + if (earlier->ds_phys->ds_creation_txg >= + later->ds_phys->ds_creation_txg) + return (B_FALSE); + + if (later->ds_dir == earlier->ds_dir) + return (B_TRUE); + if (!dsl_dir_is_clone(later->ds_dir)) + return (B_FALSE); + + rw_enter(&dp->dp_config_rwlock, RW_READER); + if (later->ds_dir->dd_phys->dd_origin_obj == earlier->ds_object) { + rw_exit(&dp->dp_config_rwlock); + return (B_TRUE); + } + error = dsl_dataset_hold_obj(dp, + later->ds_dir->dd_phys->dd_origin_obj, FTAG, &origin); + rw_exit(&dp->dp_config_rwlock); + if (error != 0) + return (B_FALSE); + ret = is_before(origin, earlier); + dsl_dataset_rele(origin, FTAG); + return (ret); +} + int -dmu_send(objset_t *tosnap, objset_t *fromsnap, boolean_t fromorigin, - int outfd, struct file *fp, offset_t *off) +dmu_send(objset_t *tosnap, objset_t *fromsnap, int outfd, struct file *fp, + offset_t *off) { dsl_dataset_t *ds = tosnap->os_dsl_dataset; dsl_dataset_t *fromds = fromsnap ? fromsnap->os_dsl_dataset : NULL; @@ -418,30 +457,13 @@ dmu_send(objset_t *tosnap, objset_t *fromsnap, boolean_t fromorigin, if (ds->ds_phys->ds_next_snap_obj == 0) return (EINVAL); - /* fromsnap must be an earlier snapshot from the same fs as tosnap */ - if (fromds && (ds->ds_dir != fromds->ds_dir || - fromds->ds_phys->ds_creation_txg >= ds->ds_phys->ds_creation_txg)) + /* + * fromsnap must be an earlier snapshot from the same fs as tosnap, + * or the origin's fs. + */ + if (fromds != NULL && !is_before(ds, fromds)) return (EXDEV); - if (fromorigin) { - dsl_pool_t *dp = ds->ds_dir->dd_pool; - - if (fromsnap) - return (EINVAL); - - if (dsl_dir_is_clone(ds->ds_dir)) { - rw_enter(&dp->dp_config_rwlock, RW_READER); - err = dsl_dataset_hold_obj(dp, - ds->ds_dir->dd_phys->dd_origin_obj, FTAG, &fromds); - rw_exit(&dp->dp_config_rwlock); - if (err) - return (err); - } else { - fromorigin = B_FALSE; - } - } - - drr = kmem_zalloc(sizeof (dmu_replay_record_t), KM_SLEEP); drr->drr_type = DRR_BEGIN; drr->drr_u.drr_begin.drr_magic = DMU_BACKUP_MAGIC; @@ -466,7 +488,7 @@ dmu_send(objset_t *tosnap, objset_t *fromsnap, boolean_t fromorigin, drr->drr_u.drr_begin.drr_creation_time = ds->ds_phys->ds_creation_time; drr->drr_u.drr_begin.drr_type = tosnap->os_phys->os_type; - if (fromorigin) + if (fromds != NULL && ds->ds_dir != fromds->ds_dir) drr->drr_u.drr_begin.drr_flags |= DRR_FLAG_CLONE; drr->drr_u.drr_begin.drr_toguid = ds->ds_phys->ds_guid; if (ds->ds_phys->ds_flags & DS_FLAG_CI_DATASET) @@ -478,8 +500,6 @@ dmu_send(objset_t *tosnap, objset_t *fromsnap, boolean_t fromorigin, if (fromds) fromtxg = fromds->ds_phys->ds_creation_txg; - if (fromorigin) - dsl_dataset_rele(fromds, FTAG); dsp = kmem_zalloc(sizeof (dmu_sendarg_t), KM_SLEEP); @@ -538,8 +558,7 @@ out: } int -dmu_send_estimate(objset_t *tosnap, objset_t *fromsnap, boolean_t fromorigin, - uint64_t *sizep) +dmu_send_estimate(objset_t *tosnap, objset_t *fromsnap, uint64_t *sizep) { dsl_dataset_t *ds = tosnap->os_dsl_dataset; dsl_dataset_t *fromds = fromsnap ? fromsnap->os_dsl_dataset : NULL; @@ -551,27 +570,13 @@ dmu_send_estimate(objset_t *tosnap, objset_t *fromsnap, boolean_t fromorigin, if (ds->ds_phys->ds_next_snap_obj == 0) return (EINVAL); - /* fromsnap must be an earlier snapshot from the same fs as tosnap */ - if (fromds && (ds->ds_dir != fromds->ds_dir || - fromds->ds_phys->ds_creation_txg >= ds->ds_phys->ds_creation_txg)) + /* + * fromsnap must be an earlier snapshot from the same fs as tosnap, + * or the origin's fs. + */ + if (fromds != NULL && !is_before(ds, fromds)) return (EXDEV); - if (fromorigin) { - if (fromsnap) - return (EINVAL); - - if (dsl_dir_is_clone(ds->ds_dir)) { - rw_enter(&dp->dp_config_rwlock, RW_READER); - err = dsl_dataset_hold_obj(dp, - ds->ds_dir->dd_phys->dd_origin_obj, FTAG, &fromds); - rw_exit(&dp->dp_config_rwlock); - if (err) - return (err); - } else { - fromorigin = B_FALSE; - } - } - /* Get uncompressed size estimate of changed data. */ if (fromds == NULL) { size = ds->ds_phys->ds_uncompressed_bytes; @@ -579,8 +584,6 @@ dmu_send_estimate(objset_t *tosnap, objset_t *fromsnap, boolean_t fromorigin, uint64_t used, comp; err = dsl_dataset_space_written(fromds, ds, &used, &comp, &size); - if (fromorigin) - dsl_dataset_rele(fromds, FTAG); if (err) return (err); } @@ -679,8 +682,7 @@ recv_new_sync(void *arg1, void *arg2, dmu_tx_t *tx) rbsa->ds, &rbsa->ds->ds_phys->ds_bp, rbsa->type, tx); } - spa_history_log_internal(LOG_DS_REPLAY_FULL_SYNC, - dd->dd_pool->dp_spa, tx, "dataset = %lld", dsobj); + spa_history_log_internal_ds(rbsa->ds, "receive new", tx, ""); } /* ARGSUSED */ @@ -781,8 +783,7 @@ recv_existing_sync(void *arg1, void *arg2, dmu_tx_t *tx) rbsa->ds = cds; - spa_history_log_internal(LOG_DS_REPLAY_INC_SYNC, - dp->dp_spa, tx, "dataset = %lld", dsobj); + spa_history_log_internal_ds(cds, "receive over existing", tx, ""); } static boolean_t @@ -1616,6 +1617,7 @@ recv_end_sync(void *arg1, void *arg2, dmu_tx_t *tx) dmu_buf_will_dirty(ds->ds_dbuf, tx); ds->ds_phys->ds_flags &= ~DS_FLAG_INCONSISTENT; + spa_history_log_internal_ds(ds, "finished receiving", tx, ""); } static int |