/* ARGSUSED */
static int
zfsctl_snapdir_mkdir(vnode_t *dvp, char *dirname, vattr_t *vap, vnode_t **vpp,
cred_t *cr, caller_context_t *cc, int flags, vsecattr_t *vsecp)
{
zfsvfs_t *zfsvfs = dvp->v_vfsp->vfs_data;
char name[ZFS_MAX_DATASET_NAME_LEN];
int err;
static enum symfollow follow = NO_FOLLOW;
static enum uio_seg seg = UIO_SYSSPACE;
if (zfs_component_namecheck(dirname, NULL, NULL) != 0)
return (SET_ERROR(EILSEQ));
dmu_objset_name(zfsvfs->z_os, name);
*vpp = NULL;
err = zfs_secpolicy_snapshot_perms(name, cr);
if (err != 0)
return (err);
if (err == 0) {
err = dmu_objset_snapshot_one(name, dirname);
if (err != 0)
return (err);
err = lookupnameat(dirname, seg, follow, NULL, vpp, dvp);
}
return (err);
}
int
dmu_objset_snapshot(char *fsname, char *snapname, boolean_t recursive)
{
dsl_sync_task_t *dst;
struct osnode *osn;
struct snaparg sn = { 0 };
spa_t *spa;
int err;
(void) strcpy(sn.failed, fsname);
err = spa_open(fsname, &spa, FTAG);
if (err)
return (err);
sn.dstg = dsl_sync_task_group_create(spa_get_dsl(spa));
sn.snapname = snapname;
list_create(&sn.objsets, sizeof (struct osnode),
offsetof(struct osnode, node));
if (recursive) {
sn.checkperms = B_TRUE;
err = dmu_objset_find(fsname,
dmu_objset_snapshot_one, &sn, DS_FIND_CHILDREN);
} else {
sn.checkperms = B_FALSE;
err = dmu_objset_snapshot_one(fsname, &sn);
}
if (err)
goto out;
err = dsl_sync_task_group_wait(sn.dstg);
for (dst = list_head(&sn.dstg->dstg_tasks); dst;
dst = list_next(&sn.dstg->dstg_tasks, dst)) {
dsl_dataset_t *ds = dst->dst_arg1;
if (dst->dst_err)
dsl_dataset_name(ds, sn.failed);
}
out:
while (osn = list_head(&sn.objsets)) {
list_remove(&sn.objsets, osn);
zil_resume(dmu_objset_zil(osn->os));
dmu_objset_close(osn->os);
kmem_free(osn, sizeof (struct osnode));
}
list_destroy(&sn.objsets);
if (err)
(void) strcpy(fsname, sn.failed);
dsl_sync_task_group_destroy(sn.dstg);
spa_close(spa, FTAG);
return (err);
}
int
dmu_objset_snapshot(char *fsname, char *snapname,
nvlist_t *props, boolean_t recursive)
{
dsl_sync_task_t *dst;
struct snaparg *sn;
spa_t *spa;
int err;
sn = kmem_alloc(sizeof (struct snaparg), KM_SLEEP);
(void) strcpy(sn->failed, fsname);
err = spa_open(fsname, &spa, FTAG);
if (err) {
kmem_free(sn, sizeof (struct snaparg));
return (err);
}
sn->dstg = dsl_sync_task_group_create(spa_get_dsl(spa));
sn->snapname = snapname;
sn->props = props;
if (recursive) {
sn->checkperms = B_TRUE;
err = dmu_objset_find(fsname,
dmu_objset_snapshot_one, sn, DS_FIND_CHILDREN);
} else {
sn->checkperms = B_FALSE;
err = dmu_objset_snapshot_one(fsname, sn);
}
if (err == 0)
err = dsl_sync_task_group_wait(sn->dstg);
for (dst = list_head(&sn->dstg->dstg_tasks); dst;
dst = list_next(&sn->dstg->dstg_tasks, dst)) {
objset_t *os = dst->dst_arg1;
dsl_dataset_t *ds = os->os->os_dsl_dataset;
if (dst->dst_err)
dsl_dataset_name(ds, sn->failed);
zil_resume(dmu_objset_zil(os));
dmu_objset_close(os);
}
if (err)
(void) strcpy(fsname, sn->failed);
dsl_sync_task_group_destroy(sn->dstg);
spa_close(spa, FTAG);
kmem_free(sn, sizeof (struct snaparg));
return (err);
}
