[CIFS] move cifs acl code to new file and fix build break

Signed-off-by: Steve French <sfrench@us.ibm.com>

1 files changed, 134 insertions, 0 deletions

diff --git a/fs/cifs/cifsacl.c b/fs/cifs/cifsacl.c
new file mode 100644
index 000000000000..11ac13336ecb
--- /dev/null
+++ b/fs/cifs/cifsacl.c
@@ -0,0 +1,134 @@
+/*
+ *   fs/cifs/cifsacl.c
+ *
+ *   Copyright (C) International Business Machines  Corp., 2007
+ *   Author(s): Steve French (sfrench@us.ibm.com)
+ *
+ *   Contains the routines for mapping CIFS/NTFS ACLs
+ *
+ *   This library is free software; you can redistribute it and/or modify
+ *   it under the terms of the GNU Lesser General Public License as published
+ *   by the Free Software Foundation; either version 2.1 of the License, or
+ *   (at your option) any later version.
+ *
+ *   This library is distributed in the hope that it will be useful,
+ *   but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
+ *   the GNU Lesser General Public License for more details.
+ *
+ *   You should have received a copy of the GNU Lesser General Public License
+ *   along with this library; if not, write to the Free Software
+ *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+/* security id for everyone */
+static const struct cifs_sid sid_everyone =
+                {1, 1, {0, 0, 0, 0, 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}};
+
+static int parse_sid(struct cifs_sid *psid, char *end_of_acl)
+{
+        /* 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"));
+                return -EINVAL;
+        }
+#ifdef CONFIG_CIFS_DEBUG2
+        cFYI(1, ("revision %d num_auth %d First subauth 0x%x",
+                psid->revision, psid->num_auth, 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_auth])));
+#endif
+        return 0;
+}
+
+/* Convert CIFS ACL to POSIX form */
+int parse_sec_desc(struct cifs_ntsd *pntsd, int acl_len)
+{
+        int i;
+        int num_aces = 0;
+        int acl_size;
+        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 +
+                                cpu_to_le32(pntsd->osidoffset));
+        group_sid_ptr = (struct cifs_sid *)((char *)pntsd +
+                                cpu_to_le32(pntsd->gsidoffset));
+        dacl_ptr = (struct cifs_acl *)((char *)pntsd +
+                                cpu_to_le32(pntsd->dacloffset));
+#ifdef CONFIG_CIFS_DEBUG2
+        cFYI(1, ("revision %d type 0x%x ooffset 0x%x goffset 0x%x "
+                 "sacloffset 0x%x dacloffset 0x%x",
+                 pntsd->revision, pntsd->type,
+                 pntsd->osidoffset, pntsd->gsidoffset, pntsd->sacloffset,
+                 pntsd->dacloffset));
+#endif
+        rc = parse_sid(owner_sid_ptr, end_of_acl);
+        if (rc)
+                return rc;
+
+        rc = parse_sid(group_sid_ptr, end_of_acl);
+        if (rc)
+                return rc;
+
+/*      cifscred->uid = owner_sid_ptr->rid;
+        cifscred->gid = group_sid_ptr->rid;
+        memcpy((void *)(&(cifscred->osid)), (void *)owner_sid_ptr,
+                        sizeof (struct cifs_sid));
+        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);
+}