static struct cifs_sid_id *
id_rb_search(struct rb_root *root, struct cifs_sid *sidptr)
{
int rc;
struct rb_node *node = root->rb_node;
struct cifs_sid_id *lsidid;
while (node) {
lsidid = rb_entry(node, struct cifs_sid_id, rbnode);
rc = compare_sids(sidptr, &((lsidid)->sid));
if (rc > 0) {
node = node->rb_left;
} else if (rc < 0) {
node = node->rb_right;
} else
return lsidid;
}
return NULL;
}
static void
id_rb_insert(struct rb_root *root, struct cifs_sid *sidptr,
struct cifs_sid_id **psidid, char *typestr)
{
int rc;
char *strptr;
struct rb_node *node = root->rb_node;
struct rb_node *parent = NULL;
struct rb_node **linkto = &(root->rb_node);
struct cifs_sid_id *lsidid;
while (node) {
lsidid = rb_entry(node, struct cifs_sid_id, rbnode);
parent = node;
rc = compare_sids(sidptr, &((lsidid)->sid));
if (rc > 0) {
linkto = &(node->rb_left);
node = node->rb_left;
} else if (rc < 0) {
linkto = &(node->rb_right);
node = node->rb_right;
}
}
memcpy(&(*psidid)->sid, sidptr, sizeof(struct cifs_sid));
(*psidid)->time = jiffies - (SID_MAP_RETRY + 1);
(*psidid)->refcount = 0;
sprintf((*psidid)->sidstr, "%s", typestr);
strptr = (*psidid)->sidstr + strlen((*psidid)->sidstr);
sid_to_str(&(*psidid)->sid, strptr);
clear_bit(SID_ID_PENDING, &(*psidid)->state);
clear_bit(SID_ID_MAPPED, &(*psidid)->state);
rb_link_node(&(*psidid)->rbnode, parent, linkto);
rb_insert_color(&(*psidid)->rbnode, root);
}
static void parse_dacl(struct cifs_acl *pdacl, char *end_of_acl,
struct cifs_sid *pownersid, struct cifs_sid *pgrpsid,
struct cifs_fattr *fattr)
{
int i;
int num_aces = 0;
int acl_size;
char *acl_base;
struct cifs_ace **ppace;
/* BB need to add parm so we can store the SID BB */
if (!pdacl) {
/* no DACL in the security descriptor, set
all the permissions for user/group/other */
fattr->cf_mode |= S_IRWXUGO;
return;
}
/* validate that we do not go past end of acl */
if (end_of_acl < (char *)pdacl + le16_to_cpu(pdacl->size)) {
cERROR(1, "ACL too small to parse DACL");
return;
}
cFYI(DBG2, "DACL revision %d size %d num aces %d",
le16_to_cpu(pdacl->revision), le16_to_cpu(pdacl->size),
le32_to_cpu(pdacl->num_aces));
/* reset rwx permissions for user/group/other.
Also, if num_aces is 0 i.e. DACL has no ACEs,
user/group/other have no permissions */
fattr->cf_mode &= ~(S_IRWXUGO);
acl_base = (char *)pdacl;
acl_size = sizeof(struct cifs_acl);
num_aces = le32_to_cpu(pdacl->num_aces);
if (num_aces > 0) {
umode_t user_mask = S_IRWXU;
umode_t group_mask = S_IRWXG;
umode_t other_mask = S_IRWXO;
ppace = kmalloc(num_aces * sizeof(struct cifs_ace *),
GFP_KERNEL);
for (i = 0; i < num_aces; ++i) {
ppace[i] = (struct cifs_ace *) (acl_base + acl_size);
#ifdef CONFIG_CIFS_DEBUG2
dump_ace(ppace[i], end_of_acl);
#endif
if (compare_sids(&(ppace[i]->sid), pownersid))
access_flags_to_mode(ppace[i]->access_req,
ppace[i]->type,
&fattr->cf_mode,
&user_mask);
if (compare_sids(&(ppace[i]->sid), pgrpsid))
access_flags_to_mode(ppace[i]->access_req,
ppace[i]->type,
&fattr->cf_mode,
&group_mask);
if (compare_sids(&(ppace[i]->sid), &sid_everyone))
access_flags_to_mode(ppace[i]->access_req,
ppace[i]->type,
&fattr->cf_mode,
&other_mask);
acl_base = (char *)ppace[i];
acl_size = le16_to_cpu(ppace[i]->size);
}
kfree(ppace);
}
return;
}
static void parse_dacl(struct cifs_acl *pdacl, char *end_of_acl,
struct cifs_sid *pownersid, struct cifs_sid *pgrpsid,
struct cifs_fattr *fattr)
{
int i;
int num_aces = 0;
int acl_size;
char *acl_base;
struct cifs_ace **ppace;
if (!pdacl) {
fattr->cf_mode |= S_IRWXUGO;
return;
}
if (end_of_acl < (char *)pdacl + le16_to_cpu(pdacl->size)) {
cERROR(1, "ACL too small to parse DACL");
return;
}
cFYI(DBG2, "DACL revision %d size %d num aces %d",
le16_to_cpu(pdacl->revision), le16_to_cpu(pdacl->size),
le32_to_cpu(pdacl->num_aces));
fattr->cf_mode &= ~(S_IRWXUGO);
acl_base = (char *)pdacl;
acl_size = sizeof(struct cifs_acl);
num_aces = le32_to_cpu(pdacl->num_aces);
if (num_aces > 0) {
umode_t user_mask = S_IRWXU;
umode_t group_mask = S_IRWXG;
umode_t other_mask = S_IRWXU | S_IRWXG | S_IRWXO;
if (num_aces > ULONG_MAX / sizeof(struct cifs_ace *))
return;
ppace = kmalloc(num_aces * sizeof(struct cifs_ace *),
GFP_KERNEL);
if (!ppace) {
cERROR(1, "DACL memory allocation error");
return;
}
for (i = 0; i < num_aces; ++i) {
ppace[i] = (struct cifs_ace *) (acl_base + acl_size);
#ifdef CONFIG_CIFS_DEBUG2
dump_ace(ppace[i], end_of_acl);
#endif
if (compare_sids(&(ppace[i]->sid), pownersid) == 0)
access_flags_to_mode(ppace[i]->access_req,
ppace[i]->type,
&fattr->cf_mode,
&user_mask);
if (compare_sids(&(ppace[i]->sid), pgrpsid) == 0)
access_flags_to_mode(ppace[i]->access_req,
ppace[i]->type,
&fattr->cf_mode,
&group_mask);
if (compare_sids(&(ppace[i]->sid), &sid_everyone) == 0)
access_flags_to_mode(ppace[i]->access_req,
ppace[i]->type,
&fattr->cf_mode,
&other_mask);
if (compare_sids(&(ppace[i]->sid), &sid_authusers) == 0)
access_flags_to_mode(ppace[i]->access_req,
ppace[i]->type,
&fattr->cf_mode,
&other_mask);
acl_base = (char *)ppace[i];
acl_size = le16_to_cpu(ppace[i]->size);
}
kfree(ppace);
}
return;
}