.sym_num = SYM_NUM,
.ocon_num = OCON_NUM,
},
+ {
+ .version = POLICYDB_VERSION_COMP_FTRANS,
+ .sym_num = SYM_NUM,
+ .ocon_num = OCON_NUM,
+ },
};
static struct policydb_compat_info *policydb_lookup_compat(int version)
return 0;
}
+static int role_tr_destroy(void *key, void *datum, void *p)
+{
+ kfree(key);
+ kfree(datum);
+ return 0;
+}
+
static void ocontext_destroy(struct ocontext *c, int i)
{
if (!c)
return v;
}
+static u32 role_trans_hash(struct hashtab *h, const void *k)
+{
+ const struct role_trans_key *key = k;
+
+ return (key->role + (key->type << 3) + (key->tclass << 5)) &
+ (h->size - 1);
+}
+
+static int role_trans_cmp(struct hashtab *h, const void *k1, const void *k2)
+{
+ const struct role_trans_key *key1 = k1, *key2 = k2;
+ int v;
+
+ v = key1->role - key2->role;
+ if (v)
+ return v;
+
+ v = key1->type - key2->type;
+ if (v)
+ return v;
+
+ return key1->tclass - key2->tclass;
+}
+
/*
* Initialize a policy database structure.
*/
-static int policydb_init(struct policydb *p)
+static void policydb_init(struct policydb *p)
{
memset(p, 0, sizeof(*p));
avtab_init(&p->te_avtab);
cond_policydb_init(p);
- p->filename_trans = hashtab_create(filenametr_hash, filenametr_cmp,
- (1 << 11));
- if (!p->filename_trans)
- return -ENOMEM;
-
ebitmap_init(&p->filename_trans_ttypes);
ebitmap_init(&p->policycaps);
ebitmap_init(&p->permissive_map);
-
- return 0;
}
/*
struct genfs *g, *gtmp;
int i;
struct role_allow *ra, *lra = NULL;
- struct role_trans *tr, *ltr = NULL;
for (i = 0; i < SYM_NUM; i++) {
cond_resched();
cond_policydb_destroy(p);
- for (tr = p->role_tr; tr; tr = tr->next) {
- cond_resched();
- kfree(ltr);
- ltr = tr;
- }
- kfree(ltr);
+ hashtab_map(p->role_tr, role_tr_destroy, NULL);
+ hashtab_destroy(p->role_tr);
for (ra = p->role_allow; ra; ra = ra->next) {
cond_resched();
if (!name)
continue;
- rc = context_add_hash(p, &c->context[0]);
- if (rc) {
- sidtab_destroy(s);
- goto out;
- }
rc = sidtab_set_initial(s, sid, &c->context[0]);
if (rc) {
pr_err("SELinux: unable to load initial SID %s.\n",
return rc;
}
-static int filename_trans_read_one(struct policydb *p, void *fp)
+static int filename_trans_read_helper_compat(struct policydb *p, void *fp)
{
struct filename_trans_key key, *ft = NULL;
struct filename_trans_datum *last, *datum = NULL;
return rc;
}
+static int filename_trans_read_helper(struct policydb *p, void *fp)
+{
+ struct filename_trans_key *ft = NULL;
+ struct filename_trans_datum **dst, *datum, *first = NULL;
+ char *name = NULL;
+ u32 len, ttype, tclass, ndatum, i;
+ __le32 buf[3];
+ int rc;
+
+ /* length of the path component string */
+ rc = next_entry(buf, fp, sizeof(u32));
+ if (rc)
+ return rc;
+ len = le32_to_cpu(buf[0]);
+
+ /* path component string */
+ rc = str_read(&name, GFP_KERNEL, fp, len);
+ if (rc)
+ return rc;
+
+ rc = next_entry(buf, fp, sizeof(u32) * 3);
+ if (rc)
+ goto out;
+
+ ttype = le32_to_cpu(buf[0]);
+ tclass = le32_to_cpu(buf[1]);
+
+ ndatum = le32_to_cpu(buf[2]);
+ if (ndatum == 0) {
+ pr_err("SELinux: Filename transition key with no datum\n");
+ rc = -ENOENT;
+ goto out;
+ }
+
+ dst = &first;
+ for (i = 0; i < ndatum; i++) {
+ rc = -ENOMEM;
+ datum = kmalloc(sizeof(*datum), GFP_KERNEL);
+ if (!datum)
+ goto out;
+
+ *dst = datum;
+
+ /* ebitmap_read() will at least init the bitmap */
+ rc = ebitmap_read(&datum->stypes, fp);
+ if (rc)
+ goto out;
+
+ rc = next_entry(buf, fp, sizeof(u32));
+ if (rc)
+ goto out;
+
+ datum->otype = le32_to_cpu(buf[0]);
+ datum->next = NULL;
+
+ dst = &datum->next;
+ }
+
+ rc = -ENOMEM;
+ ft = kmalloc(sizeof(*ft), GFP_KERNEL);
+ if (!ft)
+ goto out;
+
+ ft->ttype = ttype;
+ ft->tclass = tclass;
+ ft->name = name;
+
+ rc = hashtab_insert(p->filename_trans, ft, first);
+ if (rc == -EEXIST)
+ pr_err("SELinux: Duplicate filename transition key\n");
+ if (rc)
+ goto out;
+
+ return ebitmap_set_bit(&p->filename_trans_ttypes, ttype, 1);
+
+out:
+ kfree(ft);
+ kfree(name);
+ while (first) {
+ datum = first;
+ first = first->next;
+
+ ebitmap_destroy(&datum->stypes);
+ kfree(datum);
+ }
+ return rc;
+}
+
static int filename_trans_read(struct policydb *p, void *fp)
{
u32 nel;
return rc;
nel = le32_to_cpu(buf[0]);
- p->filename_trans_count = nel;
+ if (p->policyvers < POLICYDB_VERSION_COMP_FTRANS) {
+ p->compat_filename_trans_count = nel;
+ p->filename_trans = hashtab_create(filenametr_hash,
+ filenametr_cmp, (1 << 11));
+ if (!p->filename_trans)
+ return -ENOMEM;
- for (i = 0; i < nel; i++) {
- rc = filename_trans_read_one(p, fp);
- if (rc)
- return rc;
+ for (i = 0; i < nel; i++) {
+ rc = filename_trans_read_helper_compat(p, fp);
+ if (rc)
+ return rc;
+ }
+ } else {
+ p->filename_trans = hashtab_create(filenametr_hash,
+ filenametr_cmp, nel);
+ if (!p->filename_trans)
+ return -ENOMEM;
+
+ for (i = 0; i < nel; i++) {
+ rc = filename_trans_read_helper(p, fp);
+ if (rc)
+ return rc;
+ }
}
hash_eval(p->filename_trans, "filenametr");
return 0;
int policydb_read(struct policydb *p, void *fp)
{
struct role_allow *ra, *lra;
- struct role_trans *tr, *ltr;
+ struct role_trans_key *rtk = NULL;
+ struct role_trans_datum *rtd = NULL;
int i, j, rc;
__le32 buf[4];
u32 len, nprim, nel;
char *policydb_str;
struct policydb_compat_info *info;
- rc = policydb_init(p);
- if (rc)
- return rc;
+ policydb_init(p);
/* Read the magic number and string length. */
rc = next_entry(buf, fp, sizeof(u32) * 2);
if (rc)
goto bad;
nel = le32_to_cpu(buf[0]);
- ltr = NULL;
+
+ p->role_tr = hashtab_create(role_trans_hash, role_trans_cmp, nel);
+ if (!p->role_tr)
+ goto bad;
for (i = 0; i < nel; i++) {
rc = -ENOMEM;
- tr = kzalloc(sizeof(*tr), GFP_KERNEL);
- if (!tr)
+ rtk = kmalloc(sizeof(*rtk), GFP_KERNEL);
+ if (!rtk)
goto bad;
- if (ltr)
- ltr->next = tr;
- else
- p->role_tr = tr;
+
+ rc = -ENOMEM;
+ rtd = kmalloc(sizeof(*rtd), GFP_KERNEL);
+ if (!rtd)
+ goto bad;
+
rc = next_entry(buf, fp, sizeof(u32)*3);
if (rc)
goto bad;
rc = -EINVAL;
- tr->role = le32_to_cpu(buf[0]);
- tr->type = le32_to_cpu(buf[1]);
- tr->new_role = le32_to_cpu(buf[2]);
+ rtk->role = le32_to_cpu(buf[0]);
+ rtk->type = le32_to_cpu(buf[1]);
+ rtd->new_role = le32_to_cpu(buf[2]);
if (p->policyvers >= POLICYDB_VERSION_ROLETRANS) {
rc = next_entry(buf, fp, sizeof(u32));
if (rc)
goto bad;
- tr->tclass = le32_to_cpu(buf[0]);
+ rtk->tclass = le32_to_cpu(buf[0]);
} else
- tr->tclass = p->process_class;
+ rtk->tclass = p->process_class;
rc = -EINVAL;
- if (!policydb_role_isvalid(p, tr->role) ||
- !policydb_type_isvalid(p, tr->type) ||
- !policydb_class_isvalid(p, tr->tclass) ||
- !policydb_role_isvalid(p, tr->new_role))
+ if (!policydb_role_isvalid(p, rtk->role) ||
+ !policydb_type_isvalid(p, rtk->type) ||
+ !policydb_class_isvalid(p, rtk->tclass) ||
+ !policydb_role_isvalid(p, rtd->new_role))
+ goto bad;
+
+ rc = hashtab_insert(p->role_tr, rtk, rtd);
+ if (rc)
goto bad;
- ltr = tr;
+
+ rtk = NULL;
+ rtd = NULL;
}
rc = next_entry(buf, fp, sizeof(u32));
if (rc)
goto bad;
+ rc = -ENOMEM;
p->type_attr_map_array = kvcalloc(p->p_types.nprim,
sizeof(*p->type_attr_map_array),
GFP_KERNEL);
out:
return rc;
bad:
+ kfree(rtk);
+ kfree(rtd);
policydb_destroy(p);
goto out;
}
return 0;
}
-static int role_trans_write(struct policydb *p, void *fp)
+static int role_trans_write_one(void *key, void *datum, void *ptr)
{
- struct role_trans *r = p->role_tr;
- struct role_trans *tr;
+ struct role_trans_key *rtk = key;
+ struct role_trans_datum *rtd = datum;
+ struct policy_data *pd = ptr;
+ void *fp = pd->fp;
+ struct policydb *p = pd->p;
__le32 buf[3];
- size_t nel;
int rc;
- nel = 0;
- for (tr = r; tr; tr = tr->next)
- nel++;
- buf[0] = cpu_to_le32(nel);
- rc = put_entry(buf, sizeof(u32), 1, fp);
+ buf[0] = cpu_to_le32(rtk->role);
+ buf[1] = cpu_to_le32(rtk->type);
+ buf[2] = cpu_to_le32(rtd->new_role);
+ rc = put_entry(buf, sizeof(u32), 3, fp);
if (rc)
return rc;
- for (tr = r; tr; tr = tr->next) {
- buf[0] = cpu_to_le32(tr->role);
- buf[1] = cpu_to_le32(tr->type);
- buf[2] = cpu_to_le32(tr->new_role);
- rc = put_entry(buf, sizeof(u32), 3, fp);
+ if (p->policyvers >= POLICYDB_VERSION_ROLETRANS) {
+ buf[0] = cpu_to_le32(rtk->tclass);
+ rc = put_entry(buf, sizeof(u32), 1, fp);
if (rc)
return rc;
- if (p->policyvers >= POLICYDB_VERSION_ROLETRANS) {
- buf[0] = cpu_to_le32(tr->tclass);
- rc = put_entry(buf, sizeof(u32), 1, fp);
- if (rc)
- return rc;
- }
}
-
return 0;
}
+static int role_trans_write(struct policydb *p, void *fp)
+{
+ struct policy_data pd = { .p = p, .fp = fp };
+ __le32 buf[1];
+ int rc;
+
+ buf[0] = cpu_to_le32(p->role_tr->nel);
+ rc = put_entry(buf, sizeof(u32), 1, fp);
+ if (rc)
+ return rc;
+
+ return hashtab_map(p->role_tr, role_trans_write_one, &pd);
+}
+
static int role_allow_write(struct role_allow *r, void *fp)
{
struct role_allow *ra;
return 0;
}
-static int filename_write_helper(void *key, void *data, void *ptr)
+static int filename_write_helper_compat(void *key, void *data, void *ptr)
{
struct filename_trans_key *ft = key;
struct filename_trans_datum *datum = data;
return 0;
}
-static int filename_trans_write(struct policydb *p, void *fp)
+static int filename_write_helper(void *key, void *data, void *ptr)
{
- __le32 buf[1];
+ struct filename_trans_key *ft = key;
+ struct filename_trans_datum *datum;
+ void *fp = ptr;
+ __le32 buf[3];
int rc;
+ u32 ndatum, len = strlen(ft->name);
- if (p->policyvers < POLICYDB_VERSION_FILENAME_TRANS)
- return 0;
-
- buf[0] = cpu_to_le32(p->filename_trans_count);
+ buf[0] = cpu_to_le32(len);
rc = put_entry(buf, sizeof(u32), 1, fp);
if (rc)
return rc;
- rc = hashtab_map(p->filename_trans, filename_write_helper, fp);
+ rc = put_entry(ft->name, sizeof(char), len, fp);
if (rc)
return rc;
+ ndatum = 0;
+ datum = data;
+ do {
+ ndatum++;
+ datum = datum->next;
+ } while (unlikely(datum));
+
+ buf[0] = cpu_to_le32(ft->ttype);
+ buf[1] = cpu_to_le32(ft->tclass);
+ buf[2] = cpu_to_le32(ndatum);
+ rc = put_entry(buf, sizeof(u32), 3, fp);
+ if (rc)
+ return rc;
+
+ datum = data;
+ do {
+ rc = ebitmap_write(&datum->stypes, fp);
+ if (rc)
+ return rc;
+
+ buf[0] = cpu_to_le32(datum->otype);
+ rc = put_entry(buf, sizeof(u32), 1, fp);
+ if (rc)
+ return rc;
+
+ datum = datum->next;
+ } while (unlikely(datum));
+
return 0;
}
+static int filename_trans_write(struct policydb *p, void *fp)
+{
+ __le32 buf[1];
+ int rc;
+
+ if (p->policyvers < POLICYDB_VERSION_FILENAME_TRANS)
+ return 0;
+
+ if (p->policyvers < POLICYDB_VERSION_COMP_FTRANS) {
+ buf[0] = cpu_to_le32(p->compat_filename_trans_count);
+ rc = put_entry(buf, sizeof(u32), 1, fp);
+ if (rc)
+ return rc;
+
+ rc = hashtab_map(p->filename_trans,
+ filename_write_helper_compat, fp);
+ } else {
+ buf[0] = cpu_to_le32(p->filename_trans->nel);
+ rc = put_entry(buf, sizeof(u32), 1, fp);
+ if (rc)
+ return rc;
+
+ rc = hashtab_map(p->filename_trans, filename_write_helper, fp);
+ }
+ return rc;
+}
+
/*
* Write the configuration data in a policy database
* structure to a policy database binary representation
git.samba.org / sfrench / cifs-2.6.git / blobdiff