[CIFS] acl support part 6

Acked-by: Shirish Pargaonkar <shirishp@us.ibm.com>
CC: Cyrill Gorcunov <gorcunov@gmail.com>
Signed-off-by: Steve French <sfrench@us.ibm.com>

1 files changed, 71 insertions, 20 deletions

diff --git a/fs/cifs/cifsacl.c b/fs/cifs/cifsacl.c
index 154cb8449b9b..14200bd45b30 100644
--- a/fs/cifs/cifsacl.c
+++ b/fs/cifs/cifsacl.c
@@ -97,7 +97,7 @@ int match_sid(struct cifs_sid *ctsid)
 
 /* if the two SIDs (roughly equivalent to a UUID for a user or group) are
    the same returns 1, if they do not match returns 0 */
-int compare_sids(struct cifs_sid *ctsid, struct cifs_sid *cwsid)
+int compare_sids(const struct cifs_sid *ctsid, const struct cifs_sid *cwsid)
 {
         int i;
         int num_subauth, num_sat, num_saw;
@@ -129,28 +129,77 @@ int compare_sids(struct cifs_sid *ctsid, struct cifs_sid *cwsid)
         return (1); /* sids compare/match */
 }
 
-void get_mode_from_acl(struct inode * inode, const char * path)
+/*
+   change posix mode to reflect permissions
+   pmode is the existing mode (we only want to overwrite part of this
+   bits to set can be: S_IRWXU, S_IRWXG or S_IRWXO ie 00700 or 00070 or 00007
+*/
+static void access_flags_to_mode(__u32 access_flags, umode_t * pmode,
+                                 umode_t bits_to_set)
+{
+
+#ifdef CONFIG_CIFS_DEBUG2
+        cFYI(1, ("access flags 0x%x mode now 0x%x", access_flags, *pmode);
+#endif
+
+        return;
+}
+
+/* Translate the CIFS ACL (simlar to NTFS ACL) for a file into mode bits */
+
+void acl_to_uid_mode(struct inode *inode, const char *path)
 {
+        struct cifsFileInfo *open_file;
+        int unlock_file = FALSE;
+        int xid;
+        int rc = -EIO;
+        __u16 fid;
+        struct super_block *sb;
+        struct cifs_sb_info *cifs_sb;
 
         cFYI(1, ("get mode from ACL for %s", path));
         
         if (inode == NULL)
                 return;
 
-        /* find an open readable handle
-           if handle found
-                 lock handle 
-           else open file
-              if no open file can not hurt to check if path is null
-           GetCIFSACL
-           for all ACEs in ACL {
-                   if U or G or O
-                           inode->i_mode = parse_ace(file_type, UG or O, ace->perms, inode->i_mode)
-                   else continue
-           }
-           if handle open close it
-           else unlock handle */
+        xid = GetXid();
+        open_file = find_readable_file(CIFS_I(inode));
+        if (open_file) {
+                unlock_file = TRUE;
+                fid = open_file->netfid;
+        } else {
+                int oplock = FALSE;
+                /* open file */
+                sb = inode->i_sb;
+                if (sb == NULL) {
+                        FreeXid(xid);
+                        return;
+                }
+                cifs_sb = CIFS_SB(sb);
+                rc = CIFSSMBOpen(xid, cifs_sb->tcon, path, FILE_OPEN,
+                                GENERIC_READ, 0, &fid, &oplock, NULL,
+                                cifs_sb->local_nls, cifs_sb->mnt_cifs_flags &
+                                        CIFS_MOUNT_MAP_SPECIAL_CHR);
+                if (rc != 0) {
+                        cERROR(1, ("Unable to open file to get ACL"));
+                        FreeXid(xid);
+                        return;
+                }
+        }
+
+        /*   rc = CIFSSMBGetCIFSACL(xid, cifs_sb->tcon, fid, pntsd, acllen,
+                                    ACL_TYPE_ACCESS); */
+
+        if (unlock_file == TRUE)
+                atomic_dec(&open_file->wrtPending);
+        else
+                CIFSSMBClose(xid, cifs_sb->tcon, fid);
+
+/* parse ACEs e.g.
+        rc = parse_sec_desc(pntsd, acllen, inode);
+*/
 
+        FreeXid(xid);
         return;
 }
 
@@ -193,7 +242,8 @@ static void parse_ace(struct cifs_ace *pace, char *end_of_acl)
 
 
 static void parse_dacl(struct cifs_acl *pdacl, char *end_of_acl,
-                       struct cifs_sid *pownersid, struct cifs_sid *pgrpsid)
+                       struct cifs_sid *pownersid, struct cifs_sid *pgrpsid
+                       struct inode *inode)
 {
         int i;
         int num_aces = 0;
@@ -281,7 +331,8 @@ static int parse_sid(struct cifs_sid *psid, char *end_of_acl)
 
 
 /* Convert CIFS ACL to POSIX form */
-int parse_sec_desc(struct cifs_ntsd *pntsd, int acl_len)
+static int parse_sec_desc(struct cifs_ntsd *pntsd, int acl_len,
+                          struct inode *inode)
 {
         int rc;
         struct cifs_sid *owner_sid_ptr, *group_sid_ptr;
@@ -310,14 +361,14 @@ int parse_sec_desc(struct cifs_ntsd *pntsd, int acl_len)
         if (rc)
                 return rc;
 
-        parse_dacl(dacl_ptr, end_of_acl, owner_sid_ptr, group_sid_ptr);
+        parse_dacl(dacl_ptr, end_of_acl, owner_sid_ptr, group_sid_ptr, inode);
 
 /*      cifscred->uid = owner_sid_ptr->rid;
         cifscred->gid = group_sid_ptr->rid;
         memcpy((void *)(&(cifscred->osid)), (void *)owner_sid_ptr,
-                        sizeof (struct cifs_sid));
+                        sizeof(struct cifs_sid));
         memcpy((void *)(&(cifscred->gsid)), (void *)group_sid_ptr,
-                        sizeof (struct cifs_sid)); */
+                        sizeof(struct cifs_sid)); */
 
 
         return (0);