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-rw-r--r--cmd/zfs/zfs_main.c114
1 files changed, 92 insertions, 22 deletions
diff --git a/cmd/zfs/zfs_main.c b/cmd/zfs/zfs_main.c
index 0ebd16f6d..53b76e25d 100644
--- a/cmd/zfs/zfs_main.c
+++ b/cmd/zfs/zfs_main.c
@@ -254,9 +254,9 @@ get_usage(zfs_help_t idx)
return (gettext("\tclone [-p] [-o property=value] ... "
"<snapshot> <filesystem|volume>\n"));
case HELP_CREATE:
- return (gettext("\tcreate [-p] [-o property=value] ... "
+ return (gettext("\tcreate [-Pnpv] [-o property=value] ... "
"<filesystem>\n"
- "\tcreate [-ps] [-b blocksize] [-o property=value] ... "
+ "\tcreate [-Pnpsv] [-b blocksize] [-o property=value] ... "
"-V <size> <volume>\n"));
case HELP_DESTROY:
return (gettext("\tdestroy [-fnpRrv] <filesystem|volume>\n"
@@ -867,8 +867,8 @@ usage:
}
/*
- * zfs create [-p] [-o prop=value] ... fs
- * zfs create [-ps] [-b blocksize] [-o prop=value] ... -V vol size
+ * zfs create [-Pnpv] [-o prop=value] ... fs
+ * zfs create [-Pnpsv] [-b blocksize] [-o prop=value] ... -V vol size
*
* Create a new dataset. This command can be used to create filesystems
* and volumes. Snapshot creation is handled by 'zfs snapshot'.
@@ -880,16 +880,29 @@ usage:
* SPA_VERSION_REFRESERVATION, we set a refreservation instead.
*
* The '-p' flag creates all the non-existing ancestors of the target first.
+ *
+ * The '-n' flag is no-op (dry run) mode. This will perform a user-space sanity
+ * check of arguments and properties, but does not check for permissions,
+ * available space, etc.
+ *
+ * The '-v' flag is for verbose output.
+ *
+ * The '-P' flag is used for parseable output. It implies '-v'.
*/
static int
zfs_do_create(int argc, char **argv)
{
zfs_type_t type = ZFS_TYPE_FILESYSTEM;
+ zpool_handle_t *zpool_handle = NULL;
+ nvlist_t *real_props = NULL;
uint64_t volsize = 0;
int c;
boolean_t noreserve = B_FALSE;
boolean_t bflag = B_FALSE;
boolean_t parents = B_FALSE;
+ boolean_t dryrun = B_FALSE;
+ boolean_t verbose = B_FALSE;
+ boolean_t parseable = B_FALSE;
int ret = 1;
nvlist_t *props;
uint64_t intval;
@@ -898,7 +911,7 @@ zfs_do_create(int argc, char **argv)
nomem();
/* check options */
- while ((c = getopt(argc, argv, ":V:b:so:p")) != -1) {
+ while ((c = getopt(argc, argv, ":PV:b:nso:pv")) != -1) {
switch (c) {
case 'V':
type = ZFS_TYPE_VOLUME;
@@ -914,6 +927,10 @@ zfs_do_create(int argc, char **argv)
nomem();
volsize = intval;
break;
+ case 'P':
+ verbose = B_TRUE;
+ parseable = B_TRUE;
+ break;
case 'p':
parents = B_TRUE;
break;
@@ -931,6 +948,9 @@ zfs_do_create(int argc, char **argv)
intval) != 0)
nomem();
break;
+ case 'n':
+ dryrun = B_TRUE;
+ break;
case 'o':
if (!parseprop(props, optarg))
goto error;
@@ -938,6 +958,9 @@ zfs_do_create(int argc, char **argv)
case 's':
noreserve = B_TRUE;
break;
+ case 'v':
+ verbose = B_TRUE;
+ break;
case ':':
(void) fprintf(stderr, gettext("missing size "
"argument\n"));
@@ -969,14 +992,9 @@ zfs_do_create(int argc, char **argv)
goto badusage;
}
- if (type == ZFS_TYPE_VOLUME && !noreserve) {
- zpool_handle_t *zpool_handle;
- nvlist_t *real_props = NULL;
- uint64_t spa_version;
+ if (dryrun || (type == ZFS_TYPE_VOLUME && !noreserve)) {
+ char msg[ZFS_MAX_DATASET_NAME_LEN * 2];
char *p;
- zfs_prop_t resv_prop;
- char *strval;
- char msg[1024];
if ((p = strchr(argv[0], '/')) != NULL)
*p = '\0';
@@ -985,25 +1003,31 @@ zfs_do_create(int argc, char **argv)
*p = '/';
if (zpool_handle == NULL)
goto error;
- spa_version = zpool_get_prop_int(zpool_handle,
- ZPOOL_PROP_VERSION, NULL);
- if (spa_version >= SPA_VERSION_REFRESERVATION)
- resv_prop = ZFS_PROP_REFRESERVATION;
- else
- resv_prop = ZFS_PROP_RESERVATION;
(void) snprintf(msg, sizeof (msg),
+ dryrun ? gettext("cannot verify '%s'") :
gettext("cannot create '%s'"), argv[0]);
if (props && (real_props = zfs_valid_proplist(g_zfs, type,
props, 0, NULL, zpool_handle, B_TRUE, msg)) == NULL) {
zpool_close(zpool_handle);
goto error;
}
+ }
+
+ if (type == ZFS_TYPE_VOLUME && !noreserve) {
+ uint64_t spa_version;
+ zfs_prop_t resv_prop;
+ char *strval;
+
+ spa_version = zpool_get_prop_int(zpool_handle,
+ ZPOOL_PROP_VERSION, NULL);
+ if (spa_version >= SPA_VERSION_REFRESERVATION)
+ resv_prop = ZFS_PROP_REFRESERVATION;
+ else
+ resv_prop = ZFS_PROP_RESERVATION;
volsize = zvol_volsize_to_reservation(zpool_handle, volsize,
real_props);
- nvlist_free(real_props);
- zpool_close(zpool_handle);
if (nvlist_lookup_string(props, zfs_prop_to_name(resv_prop),
&strval) != 0) {
@@ -1014,6 +1038,10 @@ zfs_do_create(int argc, char **argv)
}
}
}
+ if (zpool_handle != NULL) {
+ zpool_close(zpool_handle);
+ nvlist_free(real_props);
+ }
if (parents && zfs_name_valid(argv[0], type)) {
/*
@@ -1025,8 +1053,50 @@ zfs_do_create(int argc, char **argv)
ret = 0;
goto error;
}
- if (zfs_create_ancestors(g_zfs, argv[0]) != 0)
- goto error;
+ if (verbose) {
+ (void) printf(parseable ? "create_ancestors\t%s\n" :
+ dryrun ? "would create ancestors of %s\n" :
+ "create ancestors of %s\n", argv[0]);
+ }
+ if (!dryrun) {
+ if (zfs_create_ancestors(g_zfs, argv[0]) != 0) {
+ goto error;
+ }
+ }
+ }
+
+ if (verbose) {
+ nvpair_t *nvp = NULL;
+ (void) printf(parseable ? "create\t%s\n" :
+ dryrun ? "would create %s\n" : "create %s\n", argv[0]);
+ while ((nvp = nvlist_next_nvpair(props, nvp)) != NULL) {
+ uint64_t uval;
+ char *sval;
+
+ switch (nvpair_type(nvp)) {
+ case DATA_TYPE_UINT64:
+ VERIFY0(nvpair_value_uint64(nvp, &uval));
+ (void) printf(parseable ?
+ "property\t%s\t%llu\n" : "\t%s=%llu\n",
+ nvpair_name(nvp), (u_longlong_t)uval);
+ break;
+ case DATA_TYPE_STRING:
+ VERIFY0(nvpair_value_string(nvp, &sval));
+ (void) printf(parseable ?
+ "property\t%s\t%s\n" : "\t%s=%s\n",
+ nvpair_name(nvp), sval);
+ break;
+ default:
+ (void) fprintf(stderr, "property '%s' "
+ "has illegal type %d\n",
+ nvpair_name(nvp), nvpair_type(nvp));
+ abort();
+ }
+ }
+ }
+ if (dryrun) {
+ ret = 0;
+ goto error;
}
/* pass to libzfs */
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-19 15:59:40 +0000