[CIFS] CIFS ACL support (part 2)
Signed-off-by: Shirish Pargaonkar <shirishp@us.ibm.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>
diff --git a/fs/cifs/cifsacl.c b/fs/cifs/cifsacl.c
index 9b84f37..23bff01 100644
--- a/fs/cifs/cifsacl.c
+++ b/fs/cifs/cifsacl.c
@@ -24,48 +24,178 @@
#include <linux/fs.h>
#include "cifspdu.h"
#include "cifsglob.h"
+#include "cifsacl.h"
#include "cifsproto.h"
#include "cifs_debug.h"
-#include "cifsacl.h"
/* security id for everyone */
static const struct cifs_sid sid_everyone =
- {1, 1, {0, 0, 0, 0, 0, 0}, {0, 0, 0, 0}};
+ {1, 1, {0, 0, 0, 0, 0, 0}, {}};
/* group users */
static const struct cifs_sid sid_user =
- {1, 2 , {0, 0, 0, 0, 0, 5}, {32, 545, 0, 0}};
+ {1, 2 , {0, 0, 0, 0, 0, 5}, {}};
+
+static void parse_ace(struct cifs_ace * pace, char * end_of_acl)
+{
+ int i;
+ int num_subauth;
+ __u32 *psub_auth;
+
+ /* validate that we do not go past end of acl */
+ if (end_of_acl < (char *)pace + sizeof(struct cifs_ace)) {
+ cERROR(1, ("ACL too small to parse ACE"));
+ return;
+ }
+
+ num_subauth = cpu_to_le32(pace->num_subauth);
+ if (num_subauth) {
+ psub_auth = (__u32 *)((char *)pace + sizeof(struct cifs_ace));
+#ifdef CONFIG_CIFS_DEBUG2
+ cFYI(1, ("ACE revision %d num_subauth %d",
+ pace->revision, pace->num_subauth));
+ for (i = 0; i < num_subauth; ++i) {
+ cFYI(1, ("ACE sub_auth[%d]: 0x%x", i,
+ le32_to_cpu(psub_auth[i])));
+ }
+
+ /* BB add length check to make sure that we do not have huge
+ num auths and therefore go off the end */
+
+ cFYI(1, ("RID %d", le32_to_cpu(psub_auth[num_subauth-1])));
+#endif
+ }
+
+ return;
+}
+
+static void parse_ntace(struct cifs_ntace * pntace, char * end_of_acl)
+{
+ /* validate that we do not go past end of acl */
+ if (end_of_acl < (char *)pntace + sizeof(struct cifs_ntace)) {
+ cERROR(1, ("ACL too small to parse NT ACE"));
+ return;
+ }
+
+#ifdef CONFIG_CIFS_DEBUG2
+ cFYI(1, ("NTACE type %d flags 0x%x size %d, access Req 0x%x",
+ pntace->type, pntace->flags, pntace->size,
+ pntace->access_req));
+#endif
+ return;
+}
+
+
+
+static void parse_dacl(struct cifs_acl * pdacl, char * end_of_acl)
+{
+ int i;
+ int num_aces = 0;
+ int acl_size;
+ char *acl_base;
+ struct cifs_ntace **ppntace;
+ struct cifs_ace **ppace;
+
+ /* BB need to add parm so we can store the SID BB */
+
+ /* validate that we do not go past end of acl */
+ if (end_of_acl < (char *)pdacl + pdacl->size) {
+ cERROR(1, ("ACL too small to parse DACL"));
+ return;
+ }
+
+#ifdef CONFIG_CIFS_DEBUG2
+ cFYI(1, ("DACL revision %d size %d num aces %d",
+ pdacl->revision, pdacl->size, pdacl->num_aces));
+#endif
+
+ acl_base = (char *)pdacl;
+ acl_size = sizeof(struct cifs_acl);
+
+ num_aces = cpu_to_le32(pdacl->num_aces);
+ if (num_aces > 0) {
+ ppntace = kmalloc(num_aces * sizeof(struct cifs_ntace *),
+ GFP_KERNEL);
+ ppace = kmalloc(num_aces * sizeof(struct cifs_ace *),
+ GFP_KERNEL);
+
+/* cifscred->cecount = pdacl->num_aces;
+ cifscred->ntaces = kmalloc(num_aces *
+ sizeof(struct cifs_ntace *), GFP_KERNEL);
+ cifscred->aces = kmalloc(num_aces *
+ sizeof(struct cifs_ace *), GFP_KERNEL);*/
+
+
+ for (i = 0; i < num_aces; ++i) {
+ ppntace[i] = (struct cifs_ntace *)
+ (acl_base + acl_size);
+ ppace[i] = (struct cifs_ace *) ((char *)ppntace[i] +
+ sizeof(struct cifs_ntace));
+
+ parse_ntace(ppntace[i], end_of_acl);
+ parse_ace(ppace[i], end_of_acl);
+
+/* memcpy((void *)(&(cifscred->ntaces[i])),
+ (void *)ppntace[i],
+ sizeof(struct cifs_ntace));
+ memcpy((void *)(&(cifscred->aces[i])),
+ (void *)ppace[i],
+ sizeof(struct cifs_ace)); */
+
+ acl_base = (char *)ppntace[i];
+ acl_size = cpu_to_le32(ppntace[i]->size);
+ }
+
+ kfree(ppace);
+ kfree(ppntace);
+ }
+
+ return;
+}
+
static int parse_sid(struct cifs_sid *psid, char *end_of_acl)
{
+ int i;
+ int num_subauth;
+ __u32 *psub_auth;
+
/* BB need to add parm so we can store the SID BB */
/* validate that we do not go past end of acl */
if (end_of_acl < (char *)psid + sizeof(struct cifs_sid)) {
- cERROR(1, ("ACL to small to parse SID"));
+ cERROR(1, ("ACL too small to parse SID"));
return -EINVAL;
}
-#ifdef CONFIG_CIFS_DEBUG2
- cFYI(1, ("revision %d num_auth %d First subauth 0x%x",
- psid->revision, psid->num_subauth, psid->sub_auth[0]));
- /* BB add length check to make sure that we do not have huge num auths
- and therefore go off the end */
- cFYI(1, ("RID 0x%x", le32_to_cpu(psid->sub_auth[psid->num_subauth])));
+ num_subauth = cpu_to_le32(psid->num_subauth);
+ if (num_subauth) {
+ psub_auth = (__u32 *)((char *)psid + sizeof(struct cifs_sid));
+#ifdef CONFIG_CIFS_DEBUG2
+ cFYI(1, ("SID revision %d num_auth %d First subauth 0x%x",
+ psid->revision, psid->num_subauth, psid->sub_auth[0]));
+
+ for (i = 0; i < num_subauth; ++i) {
+ cFYI(1, ("SID sub_auth[%d]: 0x%x ", i,
+ le32_to_cpu(psub_auth[i])));
+ }
+
+ /* BB add length check to make sure that we do not have huge
+ num auths and therefore go off the end */
+ cFYI(1, ("RID 0x%x",
+ le32_to_cpu(psid->sub_auth[psid->num_subauth])));
#endif
+ }
+
return 0;
}
+
/* Convert CIFS ACL to POSIX form */
int parse_sec_desc(struct cifs_ntsd *pntsd, int acl_len)
{
- int i, rc;
- int num_aces = 0;
- int acl_size;
+ int rc;
struct cifs_sid *owner_sid_ptr, *group_sid_ptr;
struct cifs_acl *dacl_ptr; /* no need for SACL ptr */
- struct cifs_ntace **ppntace;
- struct cifs_ace **ppace;
- char *acl_base;
char *end_of_acl = ((char *)pntsd) + acl_len;
owner_sid_ptr = (struct cifs_sid *)((char *)pntsd +
@@ -89,6 +219,8 @@
if (rc)
return rc;
+ parse_dacl(dacl_ptr, end_of_acl);
+
/* cifscred->uid = owner_sid_ptr->rid;
cifscred->gid = group_sid_ptr->rid;
memcpy((void *)(&(cifscred->osid)), (void *)owner_sid_ptr,
@@ -96,46 +228,5 @@
memcpy((void *)(&(cifscred->gsid)), (void *)group_sid_ptr,
sizeof (struct cifs_sid)); */
- num_aces = cpu_to_le32(dacl_ptr->num_aces);
- cFYI(1, ("num aces %d", num_aces));
- if (num_aces > 0) {
- ppntace = kmalloc(num_aces * sizeof(struct cifs_ntace *),
- GFP_KERNEL);
- ppace = kmalloc(num_aces * sizeof(struct cifs_ace *),
- GFP_KERNEL);
-
-/* cifscred->cecount = dacl_ptr->num_aces;
- cifscred->ntaces = kmalloc(num_aces *
- sizeof(struct cifs_ntace *), GFP_KERNEL);
- cifscred->aces = kmalloc(num_aces *
- sizeof(struct cifs_ace *), GFP_KERNEL);*/
-
- acl_base = (char *)dacl_ptr;
- acl_size = sizeof(struct cifs_acl);
-
- for (i = 0; i < num_aces; ++i) {
- ppntace[i] = (struct cifs_ntace *)
- (acl_base + acl_size);
- ppace[i] = (struct cifs_ace *)
- ((char *)ppntace[i] +
- sizeof(struct cifs_ntace));
-
-/* memcpy((void *)(&(cifscred->ntaces[i])),
- (void *)ntace_ptrptr[i],
- sizeof(struct cifs_ntace));
- memcpy((void *)(&(cifscred->aces[i])),
- (void *)ace_ptrptr[i],
- sizeof(struct cifs_ace)); */
-
- acl_base = (char *)ppntace[i];
- acl_size = cpu_to_le32(ppntace[i]->size);
-#ifdef CONFIG_CIFS_DEBUG2
- cFYI(1, ("ACE revision:%d", ppace[i]->revision));
-#endif
- }
- kfree(ppace);
- kfree(ppntace);
- }
-
return (0);
}