implicit conversion from 'boolean_t' to 'ds_hold_flags_t'

Build error on illumos with gcc 10 did reveal:

In function 'dmu_objset_refresh_ownership':
../../common/fs/zfs/dmu_objset.c:857:25: error: implicit conversion
from 'boolean_t' to 'ds_hold_flags_t' {aka 'enum ds_hold_flags'}
[-Werror=enum-conversion]
      857 |  dsl_dataset_disown(ds, decrypt, tag);
          |                         ^~~~~~~
cc1: all warnings being treated as errors

libzfs_input_check.c: In function 'zfs_ioc_input_tests':
libzfs_input_check.c:754:28: error: implicit conversion from
'enum dmu_objset_type' to 'enum lzc_dataset_type'
[-Werror=enum-conversion]
  754 |  err = lzc_create(dataset, DMU_OST_ZFS, NULL, NULL, 0);
      |                            ^~~~~~~~~~~
cc1: all warnings being treated as errors

The same issue is present in openzfs, and also the same issue about
ds_hold_flags_t, which currently defines exactly one valid value.

Reviewed-by: Igor Kozhukhov <[email protected]>
Reviewed-by: Brian Behlendorf <[email protected]>
Signed-off-by: Toomas Soome <[email protected]>
Closes #11406 

3 files changed, 27 insertions, 17 deletions

diff --git a/module/zfs/dmu_objset.c b/module/zfs/dmu_objset.c
index 17414ec75..66a8f2009 100644
--- a/module/zfs/dmu_objset.c
+++ b/module/zfs/dmu_objset.c
@@ -682,8 +682,9 @@ dmu_objset_hold_flags(const char *name, boolean_t decrypt, void *tag,
 	dsl_pool_t *dp;
 	dsl_dataset_t *ds;
 	int err;
-	ds_hold_flags_t flags = (decrypt) ? DS_HOLD_FLAG_DECRYPT : 0;
+	ds_hold_flags_t flags;
 
+	flags = (decrypt) ? DS_HOLD_FLAG_DECRYPT : DS_HOLD_FLAG_NONE;
 	err = dsl_pool_hold(name, tag, &dp);
 	if (err != 0)
 		return (err);
@@ -755,8 +756,9 @@ dmu_objset_own(const char *name, dmu_objset_type_t type,
 	dsl_pool_t *dp;
 	dsl_dataset_t *ds;
 	int err;
-	ds_hold_flags_t flags = (decrypt) ? DS_HOLD_FLAG_DECRYPT : 0;
+	ds_hold_flags_t flags;
 
+	flags = (decrypt) ? DS_HOLD_FLAG_DECRYPT : DS_HOLD_FLAG_NONE;
 	err = dsl_pool_hold(name, FTAG, &dp);
 	if (err != 0)
 		return (err);
@@ -798,8 +800,9 @@ dmu_objset_own_obj(dsl_pool_t *dp, uint64_t obj, dmu_objset_type_t type,
 {
 	dsl_dataset_t *ds;
 	int err;
-	ds_hold_flags_t flags = (decrypt) ? DS_HOLD_FLAG_DECRYPT : 0;
+	ds_hold_flags_t flags;
 
+	flags = (decrypt) ? DS_HOLD_FLAG_DECRYPT : DS_HOLD_FLAG_NONE;
 	err = dsl_dataset_own_obj(dp, obj, flags, tag, &ds);
 	if (err != 0)
 		return (err);
@@ -816,9 +819,10 @@ dmu_objset_own_obj(dsl_pool_t *dp, uint64_t obj, dmu_objset_type_t type,
 void
 dmu_objset_rele_flags(objset_t *os, boolean_t decrypt, void *tag)
 {
-	ds_hold_flags_t flags = (decrypt) ? DS_HOLD_FLAG_DECRYPT : 0;
-
+	ds_hold_flags_t flags;
 	dsl_pool_t *dp = dmu_objset_pool(os);
+
+	flags = (decrypt) ? DS_HOLD_FLAG_DECRYPT : DS_HOLD_FLAG_NONE;
 	dsl_dataset_rele_flags(os->os_dsl_dataset, flags, tag);
 	dsl_pool_rele(dp, tag);
 }
@@ -846,7 +850,9 @@ dmu_objset_refresh_ownership(dsl_dataset_t *ds, dsl_dataset_t **newds,
 {
 	dsl_pool_t *dp;
 	char name[ZFS_MAX_DATASET_NAME_LEN];
+	ds_hold_flags_t flags;
 
+	flags = (decrypt) ? DS_HOLD_FLAG_DECRYPT : DS_HOLD_FLAG_NONE;
 	VERIFY3P(ds, !=, NULL);
 	VERIFY3P(ds->ds_owner, ==, tag);
 	VERIFY(dsl_dataset_long_held(ds));
@@ -854,21 +860,22 @@ dmu_objset_refresh_ownership(dsl_dataset_t *ds, dsl_dataset_t **newds,
 	dsl_dataset_name(ds, name);
 	dp = ds->ds_dir->dd_pool;
 	dsl_pool_config_enter(dp, FTAG);
-	dsl_dataset_disown(ds, decrypt, tag);
-	VERIFY0(dsl_dataset_own(dp, name,
-	    (decrypt) ? DS_HOLD_FLAG_DECRYPT : 0, tag, newds));
+	dsl_dataset_disown(ds, flags, tag);
+	VERIFY0(dsl_dataset_own(dp, name, flags, tag, newds));
 	dsl_pool_config_exit(dp, FTAG);
 }
 
 void
 dmu_objset_disown(objset_t *os, boolean_t decrypt, void *tag)
 {
+	ds_hold_flags_t flags;
+
+	flags = (decrypt) ? DS_HOLD_FLAG_DECRYPT : DS_HOLD_FLAG_NONE;
 	/*
 	 * Stop upgrading thread
 	 */
 	dmu_objset_upgrade_stop(os);
-	dsl_dataset_disown(os->os_dsl_dataset,
-	    (decrypt) ? DS_HOLD_FLAG_DECRYPT : 0, tag);
+	dsl_dataset_disown(os->os_dsl_dataset, flags, tag);
 }
 
 void
diff --git a/module/zfs/dmu_recv.c b/module/zfs/dmu_recv.c
index f2d151578..a0fd157eb 100644
--- a/module/zfs/dmu_recv.c
+++ b/module/zfs/dmu_recv.c
@@ -560,7 +560,7 @@ dmu_recv_begin_check(void *arg, dmu_tx_t *tx)
 	struct drr_begin *drrb = drba->drba_cookie->drc_drrb;
 	uint64_t fromguid = drrb->drr_fromguid;
 	int flags = drrb->drr_flags;
-	ds_hold_flags_t dsflags = 0;
+	ds_hold_flags_t dsflags = DS_HOLD_FLAG_NONE;
 	int error;
 	uint64_t featureflags = drba->drba_cookie->drc_featureflags;
 	dsl_dataset_t *ds;
@@ -772,7 +772,7 @@ dmu_recv_begin_sync(void *arg, dmu_tx_t *tx)
 	dsl_dataset_t *ds, *newds;
 	objset_t *os;
 	uint64_t dsobj;
-	ds_hold_flags_t dsflags = 0;
+	ds_hold_flags_t dsflags = DS_HOLD_FLAG_NONE;
 	int error;
 	uint64_t crflags = 0;
 	dsl_crypto_params_t dummy_dcp = { 0 };
@@ -946,7 +946,7 @@ dmu_recv_resume_begin_check(void *arg, dmu_tx_t *tx)
 	dsl_pool_t *dp = dmu_tx_pool(tx);
 	struct drr_begin *drrb = drc->drc_drrb;
 	int error;
-	ds_hold_flags_t dsflags = 0;
+	ds_hold_flags_t dsflags = DS_HOLD_FLAG_NONE;
 	dsl_dataset_t *ds;
 	const char *tofs = drc->drc_tofs;
 
@@ -1094,7 +1094,7 @@ dmu_recv_resume_begin_sync(void *arg, dmu_tx_t *tx)
 	const char *tofs = drba->drba_cookie->drc_tofs;
 	uint64_t featureflags = drba->drba_cookie->drc_featureflags;
 	dsl_dataset_t *ds;
-	ds_hold_flags_t dsflags = 0;
+	ds_hold_flags_t dsflags = DS_HOLD_FLAG_NONE;
 	/* 6 extra bytes for /%recv */
 	char recvname[ZFS_MAX_DATASET_NAME_LEN + 6];
 
@@ -2315,8 +2315,9 @@ static void
 dmu_recv_cleanup_ds(dmu_recv_cookie_t *drc)
 {
 	dsl_dataset_t *ds = drc->drc_ds;
-	ds_hold_flags_t dsflags = (drc->drc_raw) ? 0 : DS_HOLD_FLAG_DECRYPT;
+	ds_hold_flags_t dsflags;
 
+	dsflags = (drc->drc_raw) ? DS_HOLD_FLAG_NONE : DS_HOLD_FLAG_DECRYPT;
 	/*
 	 * Wait for the txg sync before cleaning up the receive. For
 	 * resumable receives, this ensures that our resume state has
diff --git a/module/zfs/dmu_send.c b/module/zfs/dmu_send.c
index 9480c8b75..d65438223 100644
--- a/module/zfs/dmu_send.c
+++ b/module/zfs/dmu_send.c
@@ -2626,7 +2626,7 @@ dmu_send_obj(const char *pool, uint64_t tosnap, uint64_t fromsnap,
 {
 	int err;
 	dsl_dataset_t *fromds;
-	ds_hold_flags_t dsflags = (rawok) ? 0 : DS_HOLD_FLAG_DECRYPT;
+	ds_hold_flags_t dsflags;
 	struct dmu_send_params dspp = {0};
 	dspp.embedok = embedok;
 	dspp.large_block_ok = large_block_ok;
@@ -2638,6 +2638,7 @@ dmu_send_obj(const char *pool, uint64_t tosnap, uint64_t fromsnap,
 	dspp.rawok = rawok;
 	dspp.savedok = savedok;
 
+	dsflags = (rawok) ? DS_HOLD_FLAG_NONE : DS_HOLD_FLAG_DECRYPT;
 	err = dsl_pool_hold(pool, FTAG, &dspp.dp);
 	if (err != 0)
 		return (err);
@@ -2711,12 +2712,13 @@ dmu_send(const char *tosnap, const char *fromsnap, boolean_t embedok,
     dmu_send_outparams_t *dsop)
 {
 	int err = 0;
-	ds_hold_flags_t dsflags = (rawok) ? 0 : DS_HOLD_FLAG_DECRYPT;
+	ds_hold_flags_t dsflags;
 	boolean_t owned = B_FALSE;
 	dsl_dataset_t *fromds = NULL;
 	zfs_bookmark_phys_t book = {0};
 	struct dmu_send_params dspp = {0};
 
+	dsflags = (rawok) ? DS_HOLD_FLAG_NONE : DS_HOLD_FLAG_DECRYPT;
 	dspp.tosnap = tosnap;
 	dspp.embedok = embedok;
 	dspp.large_block_ok = large_block_ok;