/* 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[MAXNAMELEN];
int err;
static enum symfollow follow = NO_FOLLOW;
static enum uio_seg seg = UIO_SYSSPACE;
if (snapshot_namecheck(dirname, NULL, NULL) != 0)
return (EILSEQ);
dmu_objset_name(zfsvfs->z_os, name);
*vpp = NULL;
err = zfs_secpolicy_snapshot_perms(name, cr);
if (err)
return (err);
if (err == 0) {
err = dmu_objset_snapshot(name, dirname, NULL, B_FALSE);
if (err)
return (err);
err = lookupnameat(dirname, seg, follow, NULL, vpp, dvp);
}
return (err);
}
/* ARGSUSED */
int
zfsctl_snapdir_mkdir(struct inode *dip, char *dirname, vattr_t *vap,
struct inode **ipp, cred_t *cr, int flags)
{
zfs_sb_t *zsb = ITOZSB(dip);
char *dsname;
int error;
dsname = kmem_alloc(MAXNAMELEN, KM_SLEEP);
if (snapshot_namecheck(dirname, NULL, NULL) != 0) {
error = EILSEQ;
goto out;
}
dmu_objset_name(zsb->z_os, dsname);
error = zfs_secpolicy_snapshot_perms(dsname, cr);
if (error)
goto out;
if (error == 0) {
error = dmu_objset_snapshot(dsname, dirname,
NULL, NULL, B_FALSE, B_FALSE, -1);
if (error)
goto out;
error = zfsctl_snapdir_lookup(dip, dirname, ipp,
0, cr, NULL, NULL);
}
out:
kmem_free(dsname, MAXNAMELEN);
return (error);
}
static int
dmu_objset_snapshot_one(char *name, void *arg)
{
struct snaparg *sn = arg;
objset_t *os;
int err;
(void) strcpy(sn->failed, name);
/*
* Check permissions only when requested. This only applies when
* doing a recursive snapshot. The permission checks for the starting
* dataset have already been performed in zfs_secpolicy_snapshot()
*/
if (sn->checkperms == B_TRUE &&
(err = zfs_secpolicy_snapshot_perms(name, CRED())))
return (err);
err = dmu_objset_open(name, DMU_OST_ANY, DS_MODE_USER, &os);
if (err != 0)
return (err);
/* If the objset is in an inconsistent state, return busy */
if (os->os->os_dsl_dataset->ds_phys->ds_flags & DS_FLAG_INCONSISTENT) {
dmu_objset_close(os);
return (EBUSY);
}
/*
* NB: we need to wait for all in-flight changes to get to disk,
* so that we snapshot those changes. zil_suspend does this as
* a side effect.
*/
err = zil_suspend(dmu_objset_zil(os));
if (err == 0) {
struct osnode *osn;
dsl_sync_task_create(sn->dstg, dsl_dataset_snapshot_check,
dsl_dataset_snapshot_sync, os->os->os_dsl_dataset,
sn->snapname, 3);
osn = kmem_alloc(sizeof (struct osnode), KM_SLEEP);
osn->os = os;
list_insert_tail(&sn->objsets, osn);
} else {
dmu_objset_close(os);
}
return (err);
}