static int
zfsctl_snapshot_zname(struct inode *ip, const char *name, int len, char *zname)
{
objset_t *os = ITOZSB(ip)->z_os;
if (snapshot_namecheck(name, NULL, NULL) != 0)
return (EILSEQ);
dmu_objset_name(os, zname);
if ((strlen(zname) + 1 + strlen(name)) >= len)
return (ENAMETOOLONG);
(void) strcat(zname, "@");
(void) strcat(zname, name);
return (0);
}
/*
* 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 (snapshot_namecheck(&path[1], why, what));
}