OpenZFS 8600 - ZFS channel programs - snapshot

Authored by: Chris Williamson <[email protected]>
Reviewed by: Matthew Ahrens <[email protected]>
Reviewed by: John Kennedy <[email protected]>
Reviewed by: Brad Lewis <[email protected]>
Approved by: Robert Mustacchi <[email protected]>
Ported-by: Don Brady <[email protected]>

ZFS channel programs should be able to create snapshots.
In addition to the base snapshot functionality, this entails extra
logic to handle edge cases which were formerly not possible, such as
creating then destroying a snapshot in the same transaction sync.

OpenZFS-issue: https://www.illumos.org/issues/8600
OpenZFS-commit: https://github.com/openzfs/openzfs/commit/68089b8b

1 files changed, 9 insertions, 0 deletions

diff --git a/include/sys/dsl_dataset.h b/include/sys/dsl_dataset.h
index ee822a201..0030fca24 100644
--- a/include/sys/dsl_dataset.h
+++ b/include/sys/dsl_dataset.h
@@ -252,6 +252,13 @@ typedef struct dsl_dataset_rollback_arg {
 	nvlist_t *ddra_result;
 } dsl_dataset_rollback_arg_t;
 
+typedef struct dsl_dataset_snapshot_arg {
+	nvlist_t *ddsa_snaps;
+	nvlist_t *ddsa_props;
+	nvlist_t *ddsa_errors;
+	cred_t *ddsa_cr;
+} dsl_dataset_snapshot_arg_t;
+
 /*
  * The max length of a temporary tag prefix is the number of hex digits
  * required to express UINT64_MAX plus one for the hyphen.
@@ -296,6 +303,8 @@ uint64_t dsl_dataset_create_sync(dsl_dir_t *pds, const char *lastname,
     struct dsl_crypto_params *, dmu_tx_t *);
 uint64_t dsl_dataset_create_sync_dd(dsl_dir_t *dd, dsl_dataset_t *origin,
     struct dsl_crypto_params *dcp, uint64_t flags, dmu_tx_t *tx);
+void dsl_dataset_snapshot_sync(void *arg, dmu_tx_t *tx);
+int dsl_dataset_snapshot_check(void *arg, dmu_tx_t *tx);
 int dsl_dataset_snapshot(nvlist_t *snaps, nvlist_t *props, nvlist_t *errors);
 void dsl_dataset_promote_sync(void *arg, dmu_tx_t *tx);
 int dsl_dataset_promote_check(void *arg, dmu_tx_t *tx);