static int noinline_for_stack br_perm_val(char *perm)
{
int val, bad, sz;
char *p;
substring_t args[MAX_OPT_ARGS];
au_br_perm_str_t attr;
p = strchr(perm, '+');
if (p)
*p = 0;
val = match_token(perm, brperm, args);
if (!val) {
if (p)
*p = '+';
pr_warn("ignored branch permission %s\n", perm);
val = AuBrPerm_RO;
goto out;
}
if (!p)
goto out;
val |= br_attr_val(p + 1, brattr, args);
bad = 0;
switch (val & AuBrPerm_Mask) {
case AuBrPerm_RO:
case AuBrPerm_RR:
bad = val & AuBrWAttr_Mask;
val &= ~AuBrWAttr_Mask;
break;
case AuBrPerm_RW:
bad = val & AuBrRAttr_Mask;
val &= ~AuBrRAttr_Mask;
break;
}
/*
* 'unpin' attrib becomes meaningless since linux-3.18-rc1, but aufs
* does not treat it as an error, just warning.
* this is a tiny guard for the user operation.
*/
if (val & AuBrAttr_UNPIN) {
bad |= AuBrAttr_UNPIN;
val &= ~AuBrAttr_UNPIN;
}
if (unlikely(bad)) {
sz = au_do_optstr_br_attr(&attr, bad);
AuDebugOn(!sz);
pr_warn("ignored branch attribute %s\n", attr.a);
}
out:
return val;
}
static int noinline_for_stack br_perm_val(char *perm)
{
int val, bad, sz;
char *p;
substring_t args[MAX_OPT_ARGS];
au_br_perm_str_t attr;
p = strchr(perm, '+');
if (p)
*p = 0;
val = match_token(perm, brperm, args);
if (!val) {
if (p)
*p = '+';
pr_warn("ignored branch permission %s\n", perm);
val = AuBrPerm_RO;
goto out;
}
if (!p)
goto out;
val |= br_attr_val(p + 1, brattr, args);
bad = 0;
switch (val & AuBrPerm_Mask) {
case AuBrPerm_RO:
case AuBrPerm_RR:
bad = val & AuBrWAttr_Mask;
val &= ~AuBrWAttr_Mask;
break;
case AuBrPerm_RW:
bad = val & AuBrRAttr_Mask;
val &= ~AuBrRAttr_Mask;
break;
}
if (unlikely(bad)) {
sz = au_do_optstr_br_attr(&attr, bad);
AuDebugOn(!sz);
pr_warn("ignored branch attribute %s\n", attr.a);
}
out:
return val;
}
void au_optstr_br_perm(au_br_perm_str_t *str, int perm)
{
au_br_perm_str_t attr;
const char *p;
char *q;
int sz;
q = str->a;
p = au_optstr(&perm, brperm);
AuDebugOn(!p || !*p);
sz = strlen(p);
memcpy(q, p, sz + 1);
q += sz;
sz = au_do_optstr_br_attr(&attr, perm);
if (sz) {
*q++ = '+';
memcpy(q, attr.a, sz + 1);
}
AuDebugOn(strlen(str->a) >= sizeof(str->a));
}
