/* 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);
}
/*
* Gets the full dataset name that corresponds to the given snapshot name
* Example:
* zfsctl_snapshot_zname("snap1") -> "mypool/myfs@snap1"
*/
static int
zfsctl_snapshot_zname(vnode_t *vp, const char *name, int len, char *zname)
{
objset_t *os = ((zfsvfs_t *)((vp)->v_vfsp->vfs_data))->z_os;
if (zfs_component_namecheck(name, NULL, NULL) != 0)
return (SET_ERROR(EILSEQ));
dmu_objset_name(os, zname);
if (strlen(zname) + 1 + strlen(name) >= len)
return (SET_ERROR(ENAMETOOLONG));
(void) strcat(zname, "@");
(void) strcat(zname, name);
return (0);
}
static int
dsl_bookmark_hold_ds(dsl_pool_t *dp, const char *fullname,
dsl_dataset_t **dsp, void *tag, char **shortnamep)
{
char buf[MAXNAMELEN];
char *hashp;
if (strlen(fullname) >= MAXNAMELEN)
return (SET_ERROR(ENAMETOOLONG));
hashp = strchr(fullname, '#');
if (hashp == NULL)
return (SET_ERROR(EINVAL));
*shortnamep = hashp + 1;
if (zfs_component_namecheck(*shortnamep, NULL, NULL))
return (SET_ERROR(EINVAL));
(void) strlcpy(buf, fullname, hashp - fullname + 1);
return (dsl_dataset_hold(dp, buf, tag, dsp));
}
/*
* Permissions set name must start with the letter '@' followed by the
* same character restrictions as snapshot names, except that the name
* cannot exceed 64 characters.
*/
int
permset_namecheck(const char *path, namecheck_err_t *why, char *what)
{
if (strlen(path) >= ZFS_PERMSET_MAXLEN) {
if (why)
*why = NAME_ERR_TOOLONG;
return (-1);
}
if (path[0] != '@') {
if (why) {
*why = NAME_ERR_NO_AT;
*what = path[0];
}
return (-1);
}
return (zfs_component_namecheck(&path[1], why, what));
}
