[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 0000000..11ac133
--- /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);
+}